/* roulang page: index */
:root {
            --color-primary: #1F3A31;
            --color-primary-hover: #2C5144;
            --color-bg: #F4EFE8;
            --color-accent: #E5483A;
            --color-accent-hover: #C63A2D;
            --color-gold: #D9A441;
            --color-text: #2A2A28;
            --color-text-muted: #74736D;
            --color-card-bg: #FFFFFF;
            --color-card-alt: #EDF3EE;
            --color-border: #E0D9CE;
            --color-footer-text: #EDEAE3;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-card: 0 2px 12px rgba(31, 58, 49, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(31, 58, 49, 0.16);
            --font-sans: '思源黑体', '阿里巴巴普惠体', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', monospace;
            --max-width: 1180px;
            --space-section: 72px;
            --space-section-mobile: 44px;
            --transition: 0.2s ease-out;
            --header-height: 68px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--color-primary-hover);
            text-decoration: underline;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            background: none;
            border: none;
        }
        ul,
        ol {
            list-style: none;
        }
        summary {
            list-style: none;
            cursor: pointer;
        }
        summary::-webkit-details-marker {
            display: none;
        }

        :focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            background-color: var(--color-primary);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .site-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .site-logo:hover {
            color: #fff;
            text-decoration: none;
        }
        .site-logo .logo-dot {
            width: 8px;
            height: 8px;
            background-color: var(--color-accent);
            border-radius: 50%;
            display: inline-block;
            flex-shrink: 0;
            animation: pulse-dot 2.4s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.3);
            }
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 0;
        }
        .main-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 0.92rem;
            padding: 8px 14px;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition);
        }
        .main-nav a:hover {
            color: #fff;
            text-decoration: none;
        }
        .main-nav a.active {
            color: #fff;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background-color: var(--color-accent);
            border-radius: 1px;
        }
        .nav-divider {
            width: 1px;
            height: 16px;
            background-color: rgba(255, 255, 255, 0.25);
            margin: 0 2px;
        }
        .header-cta {
            flex-shrink: 0;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-primary);
            color: #fff;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            padding: 12px 22px;
            transition: background-color var(--transition), transform var(--transition);
            white-space: nowrap;
            border: 1px solid var(--color-primary);
            text-decoration: none;
        }
        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            border-color: var(--color-primary-hover);
            color: #fff;
            text-decoration: none;
        }
        .btn-header {
            background-color: transparent;
            border: 1px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            padding: 8px 18px;
            font-size: 0.88rem;
        }
        .btn-header:hover {
            background-color: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition);
            flex-shrink: 0;
        }
        .hamburger:hover {
            background-color: rgba(255, 255, 255, 0.12);
        }
        .hamburger .bar {
            display: block;
            width: 100%;
            height: 2px;
            background-color: #fff;
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }
        .hamburger.active .bar:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.active .bar:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active .bar:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-nav {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background-color: var(--color-primary);
            padding: 12px 24px 24px;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
            z-index: 99;
        }
        .mobile-nav a {
            display: block;
            color: rgba(255, 255, 255, 0.85);
            padding: 12px 8px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 1rem;
            transition: color var(--transition);
        }
        .mobile-nav a:hover {
            color: #fff;
            text-decoration: none;
        }
        .mobile-nav .btn-header {
            display: block;
            text-align: center;
            margin-top: 14px;
            padding: 12px 18px;
        }
        .mobile-nav.open {
            display: block;
        }

        /* ===== Hero Section ===== */
        .hero {
            background-color: var(--color-primary);
            color: #fff;
            padding: 72px 0 64px;
            position: relative;
            overflow: hidden;
            background-image:
                radial-gradient(circle at 85% 30%, rgba(217, 164, 65, 0.06) 0%, transparent 45%),
                radial-gradient(circle at 10% 70%, rgba(229, 72, 58, 0.05) 0%, transparent 40%);
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: 18px;
            color: #fff;
        }
        .hero-content .hero-subtitle {
            font-size: 1.18rem;
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 560px;
        }
        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-accent);
            color: #fff;
            font-weight: 500;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            padding: 14px 28px;
            transition: background-color var(--transition), transform var(--transition);
            white-space: nowrap;
            border: none;
            text-decoration: none;
        }
        .btn-accent:hover {
            background-color: var(--color-accent-hover);
            color: #fff;
            text-decoration: none;
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: transparent;
            color: #fff;
            font-weight: 500;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            padding: 14px 28px;
            border: 1px solid rgba(255, 255, 255, 0.45);
            transition: background-color var(--transition), border-color var(--transition);
            white-space: nowrap;
            text-decoration: none;
        }
        .btn-outline-light:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
            text-decoration: none;
        }
        .hero-trust {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            align-items: center;
        }
        .hero-trust-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
        }
        .hero-trust-item .trust-dot {
            width: 6px;
            height: 6px;
            background-color: var(--color-accent);
            border-radius: 50%;
            flex-shrink: 0;
        }
        .hero-trust-item strong {
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
        }

        .hero-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            aspect-ratio: 4/3;
            background-color: rgba(255, 255, 255, 0.05);
        }
        .hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }
        .hero-visual .signal-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
            background-color: rgba(31, 58, 49, 0.88);
            border-radius: 20px;
            padding: 6px 14px;
            font-size: 0.8rem;
            color: #fff;
            letter-spacing: 0.03em;
        }
        .hero-visual .signal-badge .live-dot {
            width: 8px;
            height: 8px;
            background-color: var(--color-accent);
            border-radius: 50%;
            animation: pulse-dot 1.8s ease-in-out infinite;
        }

        /* ===== Section Base ===== */
        .section {
            padding: var(--space-section) 0;
        }
        .section-alt {
            background-color: #fff;
        }
        .section-tight {
            padding: 52px 0;
        }
        .section-header {
            margin-bottom: 40px;
        }
        .section-header .section-title {
            font-size: 1.85rem;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--color-text);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .section-header .section-title::before {
            content: '';
            width: 4px;
            height: 28px;
            background-color: var(--color-accent);
            border-radius: 2px;
            flex-shrink: 0;
        }
        .section-header .section-desc {
            color: var(--color-text-muted);
            font-size: 1rem;
            margin-top: 12px;
            max-width: 640px;
            line-height: 1.8;
        }

        /* ===== Category Index ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 16px;
        }
        .category-card {
            background-color: #fff;
            border-radius: var(--radius-md);
            padding: 22px 18px;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
            text-align: center;
            border: 1px solid transparent;
        }
        .category-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--color-border);
        }
        .category-card .cat-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background-color: var(--color-card-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--color-primary);
            letter-spacing: 0.05em;
        }
        .category-card h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--color-text);
            line-height: 1.4;
        }
        .category-card p {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }
        .category-card a {
            text-decoration: none;
            color: inherit;
        }
        .category-card a:hover {
            text-decoration: none;
            color: inherit;
        }

        /* ===== Data Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            background-color: var(--color-primary);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
        }
        .stat-item {
            text-align: center;
            padding: 12px 8px;
        }
        .stat-item .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--color-gold);
            display: block;
            line-height: 1.3;
        }
        .stat-item .stat-number.red {
            color: var(--color-accent);
        }
        .stat-item .stat-label {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.72);
            margin-top: 8px;
            display: block;
            line-height: 1.6;
        }

        /* ===== Service Matrix ===== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .service-card {
            background-color: var(--color-card-alt);
            border-radius: var(--radius-md);
            padding: 28px 26px;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
            border: 1px solid transparent;
        }
        .service-card:nth-child(even) {
            background-color: #fff;
        }
        .service-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--color-border);
        }
        .service-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--color-text);
            line-height: 1.4;
        }
        .service-card p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .service-card .read-link {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition);
        }
        .service-card .read-link:hover {
            color: var(--color-accent);
            text-decoration: none;
        }
        .service-card .read-link::after {
            content: '→';
            transition: transform var(--transition);
        }
        .service-card .read-link:hover::after {
            transform: translateX(3px);
        }

        /* ===== Process Flow ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .process-step {
            background-color: #fff;
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            position: relative;
            border-top: 3px solid var(--color-gold);
        }
        .process-step:nth-child(2) {
            border-top-color: var(--color-accent);
        }
        .process-step:nth-child(3) {
            border-top-color: var(--color-primary);
        }
        .process-step:nth-child(4) {
            border-top-color: #8B6F3F;
        }
        .process-step .step-num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-primary);
            opacity: 0.25;
            display: block;
            margin-bottom: 8px;
            line-height: 1;
        }
        .process-step h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--color-text);
            line-height: 1.4;
        }
        .process-step p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* ===== Case Cards ===== */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .case-card {
            background-color: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .case-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .case-card .case-cover {
            aspect-ratio: 16/10;
            overflow: hidden;
            position: relative;
        }
        .case-card .case-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease-out;
        }
        .case-card:hover .case-cover img {
            transform: scale(1.03);
        }
        .case-card .case-cover .case-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background-color: var(--color-card-alt);
            color: var(--color-primary);
            padding: 4px 12px;
            border-radius: 16px;
            font-size: 0.78rem;
            font-weight: 500;
        }
        .case-card .case-body {
            padding: 20px 22px 24px;
        }
        .case-card .case-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--color-text);
            line-height: 1.45;
        }
        .case-card .case-body p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .case-card .case-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .case-card .case-link::after {
            content: '→';
            transition: transform var(--transition);
        }
        .case-card .case-link:hover {
            color: var(--color-accent);
            text-decoration: none;
        }
        .case-card .case-link:hover::after {
            transform: translateX(3px);
        }

        /* ===== Brand Intro ===== */
        .brand-grid {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 48px;
            align-items: center;
        }
        .brand-card {
            background-color: var(--color-primary);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            color: #fff;
            text-align: center;
            box-shadow: var(--shadow-card-hover);
        }
        .brand-card .brand-logo {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .brand-card .brand-tagline {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .brand-card .brand-year {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.12);
            border-radius: 20px;
            padding: 6px 18px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.85);
        }
        .brand-text h2 {
            font-size: 1.85rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 18px;
            color: var(--color-text);
            letter-spacing: -0.01em;
        }
        .brand-text p {
            font-size: 0.97rem;
            color: var(--color-text-muted);
            line-height: 1.8;
            margin-bottom: 14px;
        }
        .brand-text .brand-more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--color-primary);
            margin-top: 8px;
        }
        .brand-text .brand-more-link::after {
            content: '→';
            transition: transform var(--transition);
        }
        .brand-text .brand-more-link:hover {
            color: var(--color-accent);
            text-decoration: none;
        }
        .brand-text .brand-more-link:hover::after {
            transform: translateX(3px);
        }

        /* ===== Hot Topics ===== */
        .topics-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 32px;
        }
        .topic-featured {
            background-color: #fff;
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-card);
            border-left: 4px solid var(--color-accent);
        }
        .topic-featured .topic-date {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-bottom: 10px;
        }
        .topic-featured h3 {
            font-size: 1.35rem;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--color-text);
            line-height: 1.45;
        }
        .topic-featured p {
            font-size: 0.92rem;
            color: var(--color-text-muted);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .topic-featured .topic-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .topic-featured .topic-link::after {
            content: '→';
            transition: transform var(--transition);
        }
        .topic-featured .topic-link:hover {
            color: var(--color-accent);
            text-decoration: none;
        }
        .topic-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .topic-short {
            background-color: #fff;
            border-radius: var(--radius-sm);
            padding: 16px 20px;
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            transition: box-shadow var(--transition), transform var(--transition);
            border-left: 3px solid transparent;
        }
        .topic-short:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-1px);
            border-left-color: var(--color-accent);
        }
        .topic-short a {
            font-size: 0.9rem;
            color: var(--color-text);
            font-weight: 500;
            line-height: 1.5;
            flex: 1;
        }
        .topic-short a:hover {
            color: var(--color-accent);
            text-decoration: none;
        }
        .topic-short .topic-short-date {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            flex-shrink: 0;
        }

        /* ===== Trend Data ===== */
        .trend-bar {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            background-color: var(--color-card-alt);
            border-radius: var(--radius-md);
            padding: 28px 32px;
        }
        .trend-item {
            text-align: center;
        }
        .trend-item .trend-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-accent);
            display: block;
            line-height: 1.3;
            letter-spacing: -0.02em;
        }
        .trend-item .trend-number.gold {
            color: var(--color-gold);
        }
        .trend-item .trend-label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-top: 6px;
            display: block;
            line-height: 1.6;
        }

        /* ===== Partner Strip ===== */
        .partner-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            padding: 16px 0;
        }
        .partner-tag {
            background-color: #fff;
            border: 1px solid var(--color-border);
            border-radius: 24px;
            padding: 10px 22px;
            font-size: 0.88rem;
            color: var(--color-text-muted);
            transition: border-color var(--transition), color var(--transition);
        }
        .partner-tag:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        /* ===== Team Photo Wall ===== */
        .photo-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .photo-item {
            aspect-ratio: 1/1;
            border-radius: var(--radius-md);
            overflow: hidden;
            position: relative;
            box-shadow: var(--shadow-card);
        }
        .photo-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease-out;
        }
        .photo-item:hover img {
            transform: scale(1.04);
        }
        .photo-item .photo-overlay {
            position: absolute;
            inset: 0;
            background: rgba(31, 58, 49, 0.55);
            display: flex;
            align-items: flex-end;
            padding: 16px;
            opacity: 0;
            transition: opacity var(--transition);
            border-radius: var(--radius-md);
        }
        .photo-item:hover .photo-overlay {
            opacity: 1;
        }
        .photo-item .photo-overlay span {
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            line-height: 1.5;
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background-color: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            border-left: 3px solid var(--color-accent);
            transition: border-color var(--transition);
            overflow: hidden;
        }
        .faq-item[open] {
            border-left-color: var(--color-gold);
        }
        .faq-item summary {
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            line-height: 1.5;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 1.4rem;
            font-weight: 400;
            color: var(--color-text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(45deg);
            color: var(--color-gold);
        }
        .faq-item .faq-answer {
            padding: 0 22px 20px;
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.8;
        }

        /* ===== CTA Banner ===== */
        .cta-banner {
            background-color: var(--color-primary);
            border-radius: var(--radius-lg);
            padding: 52px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
        }
        .cta-banner h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }
        .cta-banner .btn-accent {
            position: relative;
            z-index: 1;
            padding: 16px 36px;
            font-size: 1.05rem;
        }

        /* ===== Form ===== */
        .inquiry-section {
            background-color: #fff;
            border-radius: var(--radius-lg);
            padding: 48px 44px;
            box-shadow: var(--shadow-card);
            max-width: 720px;
            margin: 0 auto;
        }
        .inquiry-section h2 {
            font-size: 1.7rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 10px;
            color: var(--color-text);
            letter-spacing: -0.01em;
        }
        .inquiry-section .inquiry-sub {
            text-align: center;
            color: var(--color-text-muted);
            font-size: 0.95rem;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--color-text);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            background-color: #fff;
            border: 1px solid var(--color-primary);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            font-size: 0.95rem;
            color: var(--color-text);
            transition: border-color var(--transition), box-shadow var(--transition);
            appearance: none;
            -webkit-appearance: none;
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(229, 72, 58, 0.1);
        }
        .form-group textarea {
            min-height: 110px;
            resize: vertical;
        }
        .form-group select {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2374736D' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            padding-right: 40px;
        }
        .form-submit {
            width: 100%;
            margin-top: 8px;
            padding: 16px 24px;
            font-size: 1.05rem;
            font-weight: 600;
        }
        .form-privacy {
            text-align: center;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-top: 14px;
            line-height: 1.7;
        }

        /* ===== Footer ===== */
        .site-footer {
            background-color: var(--color-primary);
            color: var(--color-footer-text);
            padding: 56px 0 32px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            max-width: 280px;
        }
        .footer-nav h4,
        .footer-contact h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .footer-nav {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-nav a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.88rem;
            transition: color var(--transition);
        }
        .footer-nav a:hover {
            color: #fff;
            text-decoration: none;
        }
        .footer-contact p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 12px;
            line-height: 1.7;
        }
        .footer-contact .footer-btns {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 16px;
        }
        .footer-contact .btn-footer {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: transparent;
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            font-size: 0.85rem;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition), border-color var(--transition);
            text-decoration: none;
        }
        .footer-contact .btn-footer:hover {
            background-color: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            text-decoration: none;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.8rem;
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: #fff;
            text-decoration: none;
        }
        .footer-bottom .footer-meta-links {
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
        }
        .footer-bottom .icp-info {
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.4);
            line-height: 1.7;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero-visual {
                aspect-ratio: 16/9;
                max-height: 360px;
            }
            .category-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
                padding: 32px 24px;
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .brand-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .topics-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .photo-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 44px;
                --header-height: 60px;
            }
            body {
                font-size: 14px;
            }
            .site-header .main-nav {
                display: none;
            }
            .site-header .header-cta {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav {
                display: none;
            }
            .mobile-nav.open {
                display: block;
            }
            .hero {
                padding: 48px 0 40px;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-content .hero-subtitle {
                font-size: 1rem;
            }
            .hero-cta-group {
                flex-direction: column;
                gap: 10px;
            }
            .hero-cta-group .btn-accent,
            .hero-cta-group .btn-outline-light {
                width: 100%;
                text-align: center;
                justify-content: center;
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
                padding: 24px 16px;
            }
            .stat-item .stat-number {
                font-size: 1.8rem;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .trend-bar {
                grid-template-columns: 1fr;
                gap: 16px;
                padding: 20px 24px;
            }
            .photo-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .inquiry-section {
                padding: 32px 20px;
            }
            .cta-banner {
                padding: 36px 24px;
            }
            .cta-banner h2 {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-bottom .footer-meta-links {
                justify-content: center;
            }
            .section-header .section-title {
                font-size: 1.5rem;
            }
            .topic-featured h3 {
                font-size: 1.15rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }
            .hero-content h1 {
                font-size: 1.7rem;
            }
            .category-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .category-card {
                padding: 16px 12px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .photo-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .hero-trust {
                gap: 12px;
                flex-direction: column;
                align-items: flex-start;
            }
            .inquiry-section h2 {
                font-size: 1.4rem;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #1F3A31;
            --color-primary-hover: #2C5144;
            --color-bg: #F4EFE8;
            --color-accent: #E5483A;
            --color-accent-hover: #C63A2D;
            --color-gold: #D9A441;
            --color-text: #2A2A28;
            --color-text-muted: #74736D;
            --color-card-bg: #FFFFFF;
            --color-card-alt: #EDF3EE;
            --color-border: #E0D9CE;
            --color-footer-text: #EDEAE3;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-card: 0 2px 12px rgba(31, 58, 49, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(31, 58, 49, 0.16);
            --font-sans: '思源黑体', '阿里巴巴普惠体', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', monospace;
            --max-width: 1180px;
            --space-section: 72px;
            --space-section-mobile: 44px;
            --transition: 0.2s ease-out;
            --header-height: 68px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            margin: 0;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--color-primary-hover);
            text-decoration: underline;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            background: none;
            border: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--color-text);
            margin-top: 0;
        }

        p {
            margin: 0 0 1rem;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        .site-header {
            background-color: var(--color-primary);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .site-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .site-logo:hover {
            color: #fff;
            text-decoration: none;
        }

        .site-logo .logo-dot {
            width: 8px;
            height: 8px;
            background-color: var(--color-accent);
            border-radius: 50%;
            display: inline-block;
            flex-shrink: 0;
            animation: pulse-dot 2.4s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.6;
                transform: scale(1.2);
            }
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 0;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 0.92rem;
            padding: 8px 14px;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition);
            text-decoration: none;
        }

        .main-nav a:hover {
            color: #fff;
            text-decoration: none;
        }

        .main-nav a.active {
            color: #fff;
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background-color: var(--color-accent);
            border-radius: 1px;
        }

        .nav-divider {
            width: 1px;
            height: 16px;
            background-color: rgba(255, 255, 255, 0.25);
            margin: 0 2px;
        }

        .header-cta {
            flex-shrink: 0;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-primary);
            color: #fff;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            padding: 12px 22px;
            transition: background-color var(--transition), transform var(--transition);
            white-space: nowrap;
            border: 1px solid var(--color-primary);
            text-decoration: none;
        }

        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            border-color: var(--color-primary-hover);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
        }

        .btn-header {
            background-color: transparent;
            border: 1px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            padding: 8px 18px;
            font-size: 0.88rem;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition), border-color var(--transition);
        }

        .btn-header:hover {
            background-color: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            text-decoration: none;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            cursor: pointer;
            background: transparent;
            border: none;
            padding: 8px;
        }

        .hamburger span {
            display: block;
            width: 100%;
            height: 2px;
            background-color: #fff;
            border-radius: 1px;
            transition: all var(--transition);
        }

        /* Page Hero */
        .page-hero {
            padding: 48px 0 40px;
            border-bottom: 1px solid var(--color-border);
            background-color: #fff;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--color-text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--color-primary);
            text-decoration: none;
        }

        .breadcrumb-sep {
            color: var(--color-border);
            user-select: none;
        }

        .page-hero h1 {
            font-size: 2.6rem;
            margin-bottom: 16px;
        }

        .page-hero .lead {
            font-size: 1rem;
            color: var(--color-text-muted);
            max-width: 820px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* Section Common */
        .section {
            padding: var(--space-section) 0;
        }

        .section-alt {
            background-color: #fff;
        }

        .section-title {
            font-size: 1.7rem;
            margin-bottom: 12px;
            position: relative;
            padding-left: 16px;
        }

        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 28px;
            background-color: var(--color-accent);
            border-radius: 2px;
        }

        .section-sub {
            color: var(--color-text-muted);
            margin-bottom: 32px;
            max-width: 720px;
        }

        /* Case Cards */
        .case-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .case-card {
            background: var(--color-card-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
            display: flex;
            flex-direction: column;
        }

        .case-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .case-thumb {
            width: 100%;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--color-card-alt);
            flex-shrink: 0;
        }

        .case-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease-out;
        }

        .case-card:hover .case-thumb img {
            transform: scale(1.03);
        }

        .case-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .case-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--color-primary);
            background-color: var(--color-card-alt);
            border-radius: 20px;
            padding: 3px 12px;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        .case-card h3 {
            font-size: 1.25rem;
            margin-bottom: 10px;
            line-height: 1.35;
        }

        .case-card h3 a {
            color: var(--color-text);
            text-decoration: none;
            transition: color var(--transition);
        }

        .case-card h3 a:hover {
            color: var(--color-primary);
            text-decoration: none;
        }

        .case-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.75;
            flex: 1;
            margin-bottom: 14px;
        }

        .case-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.84rem;
            color: var(--color-text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--color-border);
        }

        .case-meta a {
            color: var(--color-primary);
            font-weight: 500;
            text-decoration: none;
            transition: color var(--transition);
        }

        .case-meta a:hover {
            color: var(--color-accent);
            text-decoration: none;
        }

        /* Data Strip */
        .data-strip {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            text-align: center;
        }

        .data-item {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 32px 20px;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .data-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .data-number {
            font-size: 2.6rem;
            font-weight: 700;
            color: var(--color-accent);
            line-height: 1.2;
            margin-bottom: 6px;
            font-feature-settings: "tnum";
        }

        .data-number.gold {
            color: var(--color-gold);
        }

        .data-label {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* Methodology */
        .methodology-text {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            box-shadow: var(--shadow-card);
        }

        .methodology-text p {
            font-size: 0.98rem;
            color: var(--color-text);
            line-height: 1.9;
            margin-bottom: 1.2rem;
        }

        .methodology-text p:last-child {
            margin-bottom: 0;
        }

        /* Resource List */
        .resource-list {
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .resource-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            border-bottom: 1px solid var(--color-border);
            transition: background-color var(--transition);
        }

        .resource-item:last-child {
            border-bottom: none;
        }

        .resource-item:hover {
            background-color: var(--color-card-alt);
        }

        .resource-item .resource-title {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--color-text);
        }

        .resource-item .resource-arrow {
            color: var(--color-text-muted);
            font-size: 1.1rem;
            transition: color var(--transition), transform var(--transition);
            flex-shrink: 0;
        }

        .resource-item a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            text-decoration: none;
        }

        .resource-item a:hover .resource-arrow {
            color: var(--color-accent);
            transform: translateX(4px);
        }

        .resource-item a:hover .resource-title {
            color: var(--color-primary);
        }

        /* FAQ */
        .faq-section details {
            background: #fff;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-card);
            padding: 0;
            margin-bottom: 14px;
            overflow: hidden;
            border-left: 3px solid var(--color-accent);
            transition: border-color var(--transition);
        }

        .faq-section details[open] {
            border-left-color: var(--color-gold);
        }

        .faq-section summary {
            cursor: pointer;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--transition);
        }

        .faq-section summary:hover {
            color: var(--color-primary);
        }

        .faq-section summary::-webkit-details-marker {
            display: none;
        }

        .faq-section summary::after {
            content: '+';
            font-size: 1.4rem;
            font-weight: 400;
            color: var(--color-text-muted);
            transition: transform var(--transition), color var(--transition);
            flex-shrink: 0;
        }

        .faq-section details[open] summary::after {
            content: '−';
            color: var(--color-gold);
        }

        .faq-section .faq-answer {
            padding: 0 22px 20px;
            font-size: 0.9rem;
            line-height: 1.75;
            color: var(--color-text-muted);
        }

        /* CTA Section */
        .cta-section {
            padding: var(--space-section) 0;
        }

        .cta-box {
            background-color: var(--color-primary);
            border-radius: var(--radius-lg);
            padding: 52px 40px;
            text-align: center;
            color: var(--color-footer-text);
        }

        .cta-box h2 {
            color: #fff;
            font-size: 1.8rem;
            margin-bottom: 12px;
        }

        .cta-box p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1rem;
            margin-bottom: 28px;
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-accent);
            color: #fff;
            font-weight: 500;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            padding: 14px 32px;
            transition: background-color var(--transition), transform var(--transition);
            text-decoration: none;
            border: none;
        }

        .btn-accent:hover {
            background-color: var(--color-accent-hover);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-primary);
            color: var(--color-footer-text);
            padding: 56px 0 24px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }

        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 280px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .footer-nav h4,
        .footer-contact h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-nav {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-nav a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-nav a:hover {
            color: #fff;
            text-decoration: none;
        }

        .footer-contact p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .footer-btns {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .btn-footer {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            font-size: 0.84rem;
            border-radius: var(--radius-sm);
            padding: 8px 16px;
            transition: background-color var(--transition), border-color var(--transition);
            text-decoration: none;
        }

        .btn-footer:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
            text-decoration: none;
        }

        .footer-bottom {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 20px;
            padding-top: 20px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.55);
            flex-wrap: wrap;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: #fff;
            text-decoration: none;
        }

        .footer-meta-links {
            display: flex;
            gap: 16px;
            flex-shrink: 0;
        }

        .icp-info {
            display: block;
            margin-top: 4px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav a {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
            .case-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 44px;
                --header-height: 60px;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background-color: var(--color-primary);
                flex-direction: column;
                align-items: flex-start;
                padding: 12px 24px 20px;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
                box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 0;
                font-size: 1rem;
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
            .main-nav a.active::after {
                display: none;
            }
            .nav-divider {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .header-cta {
                display: none;
            }
            .page-hero {
                padding: 32px 0 28px;
            }
            .page-hero h1 {
                font-size: 1.9rem;
            }
            .section {
                padding: var(--space-section-mobile) 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .case-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .case-card h3 {
                font-size: 1.1rem;
            }
            .data-strip {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .data-number {
                font-size: 2.2rem;
            }
            .methodology-text {
                padding: 24px 20px;
            }
            .resource-item {
                padding: 14px 16px;
            }
            .cta-box {
                padding: 36px 24px;
            }
            .cta-box h2 {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                padding-bottom: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                align-items: flex-start;
            }
            .footer-meta-links {
                gap: 12px;
                flex-wrap: wrap;
            }
            .breadcrumb {
                font-size: 0.8rem;
                gap: 4px;
            }
            .page-hero .lead {
                font-size: 0.92rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .site-logo {
                font-size: 1.15rem;
            }
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.25rem;
                padding-left: 12px;
            }
            .section-title::before {
                height: 20px;
                width: 3px;
            }
            .case-body {
                padding: 16px 16px 18px;
            }
            .case-card h3 {
                font-size: 1.05rem;
            }
            .case-excerpt {
                font-size: 0.85rem;
            }
            .case-meta {
                font-size: 0.78rem;
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .cta-box {
                padding: 28px 18px;
            }
            .btn-accent {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .faq-section summary {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-section .faq-answer {
                padding: 0 16px 16px;
                font-size: 0.85rem;
            }
            .data-number {
                font-size: 2rem;
            }
            .resource-item {
                padding: 12px 14px;
            }
            .resource-item .resource-title {
                font-size: 0.88rem;
            }
        }

/* roulang page: category3 */
:root {
            --color-primary: #1F3A31;
            --color-primary-hover: #2C5144;
            --color-bg: #F4EFE8;
            --color-accent: #E5483A;
            --color-accent-hover: #C63A2D;
            --color-gold: #D9A441;
            --color-text: #2A2A28;
            --color-text-muted: #74736D;
            --color-card-bg: #FFFFFF;
            --color-card-alt: #EDF3EE;
            --color-border: #E0D9CE;
            --color-footer-text: #EDEAE3;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-card: 0 2px 12px rgba(31, 58, 49, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(31, 58, 49, 0.16);
            --font-sans: '思源黑体', '阿里巴巴普惠体', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', monospace;
            --max-width: 1180px;
            --space-section: 72px;
            --space-section-mobile: 44px;
            --transition: 0.2s ease-out;
            --header-height: 68px;
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 44px;
                --header-height: 60px;
            }
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--color-primary-hover);
            text-decoration: underline;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            background: none;
            border: none;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            background-color: var(--color-primary);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .site-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .site-logo:hover {
            color: #fff;
            text-decoration: none;
        }

        .site-logo .logo-dot {
            width: 8px;
            height: 8px;
            background-color: var(--color-accent);
            border-radius: 50%;
            display: inline-block;
            flex-shrink: 0;
            animation: pulse-dot 2.4s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.6; transform: scale(0.85); }
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 0;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 0.92rem;
            padding: 8px 14px;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition);
        }

        .main-nav a:hover {
            color: #fff;
            text-decoration: none;
        }

        .main-nav a.active {
            color: #fff;
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background-color: var(--color-accent);
            border-radius: 1px;
        }

        .nav-divider {
            width: 1px;
            height: 16px;
            background-color: rgba(255, 255, 255, 0.25);
            margin: 0 2px;
        }

        .header-cta {
            flex-shrink: 0;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-primary);
            color: #fff;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            padding: 12px 22px;
            transition: background-color var(--transition), transform var(--transition);
            white-space: nowrap;
            border: 1px solid var(--color-primary);
            text-decoration: none;
        }

        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            border-color: var(--color-primary-hover);
            color: #fff;
            text-decoration: none;
        }

        .btn-header {
            background-color: transparent;
            border: 1px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            padding: 8px 18px;
            font-size: 0.88rem;
        }

        .btn-header:hover {
            background-color: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            text-decoration: none;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
            cursor: pointer;
        }

        .hamburger span {
            display: block;
            width: 100%;
            height: 2px;
            background-color: #fff;
            border-radius: 1px;
            transition: transform var(--transition), opacity var(--transition);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-section {
            padding: 24px 0 0;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--color-text-muted);
        }

        .breadcrumb-nav a:hover {
            color: var(--color-primary);
        }

        .breadcrumb-nav .separator {
            color: var(--color-border);
        }

        .breadcrumb-nav .current {
            color: var(--color-primary);
            font-weight: 500;
        }

        /* ===== Page Header ===== */
        .page-header {
            padding: 32px 0 40px;
        }

        .page-header h1 {
            font-size: 2.4rem;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--color-primary);
            margin-bottom: 16px;
        }

        .page-header .page-intro {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            max-width: 780px;
            line-height: 1.8;
        }

        .page-header .header-accent {
            width: 48px;
            height: 4px;
            background-color: var(--color-accent);
            border-radius: 2px;
            margin-bottom: 20px;
        }

        /* ===== Content List Section ===== */
        .content-list-section {
            padding: 40px 0 56px;
            background-color: var(--color-card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            margin-bottom: var(--space-section);
        }

        .content-list-section .container {
            padding: 0 32px;
        }

        .content-list-section .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .content-list-section .section-title::before {
            content: '';
            width: 4px;
            height: 24px;
            background-color: var(--color-accent);
            border-radius: 2px;
        }

        .guide-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .guide-item {
            display: flex;
            gap: 24px;
            padding: 20px;
            background-color: var(--color-bg);
            border-radius: var(--radius-md);
            transition: box-shadow var(--transition), transform var(--transition);
            align-items: flex-start;
        }

        .guide-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .guide-number {
            width: 48px;
            height: 48px;
            min-width: 48px;
            background-color: var(--color-primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 700;
            letter-spacing: -0.01em;
        }

        .guide-content {
            flex: 1;
        }

        .guide-content .guide-tag {
            display: inline-block;
            font-size: 0.78rem;
            background-color: var(--color-card-alt);
            color: var(--color-primary);
            padding: 2px 10px;
            border-radius: 12px;
            margin-bottom: 8px;
            font-weight: 500;
        }

        .guide-content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }

        .guide-content p {
            font-size: 0.92rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .guide-content .guide-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
        }

        .guide-content .guide-meta .read-link {
            color: var(--color-primary);
            font-weight: 500;
        }

        .guide-content .guide-meta .read-link:hover {
            color: var(--color-accent);
        }

        /* ===== Method Section ===== */
        .method-section {
            padding: 32px 0;
            margin-bottom: var(--space-section);
        }

        .method-section .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .method-section .section-title::before {
            content: '';
            width: 4px;
            height: 24px;
            background-color: var(--color-gold);
            border-radius: 2px;
        }

        .method-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .method-block .method-text {
            background-color: var(--color-card-bg);
            padding: 28px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
        }

        .method-block .method-text h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--color-primary);
        }

        .method-block .method-text p {
            font-size: 0.92rem;
            color: var(--color-text-muted);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ===== Expert Cards ===== */
        .expert-section {
            padding: 32px 0;
            margin-bottom: var(--space-section);
        }

        .expert-section .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .expert-section .section-title::before {
            content: '';
            width: 4px;
            height: 24px;
            background-color: var(--color-accent);
            border-radius: 2px;
        }

        .expert-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .expert-card {
            background-color: var(--color-card-bg);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .expert-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .expert-card .expert-avatar {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            overflow: hidden;
            margin-bottom: 16px;
            border: 2px solid var(--color-card-alt);
        }

        .expert-card .expert-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .expert-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .expert-card .expert-title {
            font-size: 0.85rem;
            color: var(--color-accent);
            font-weight: 500;
            margin-bottom: 12px;
        }

        .expert-card p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* ===== Tag Cloud ===== */
        .tag-section {
            padding: 32px 0;
            margin-bottom: var(--space-section);
        }

        .tag-section .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .tag-section .section-title::before {
            content: '';
            width: 4px;
            height: 24px;
            background-color: var(--color-gold);
            border-radius: 2px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag-cloud .tag {
            display: inline-block;
            padding: 8px 18px;
            font-size: 0.85rem;
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: 20px;
            color: var(--color-text);
            transition: border-color var(--transition), background-color var(--transition), color var(--transition);
        }

        .tag-cloud .tag:hover {
            border-color: var(--color-primary);
            background-color: var(--color-card-alt);
            color: var(--color-primary);
            text-decoration: none;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 48px 0;
            background-color: var(--color-primary);
            border-radius: var(--radius-lg);
            margin-bottom: var(--space-section);
            text-align: center;
            box-shadow: var(--shadow-card);
        }

        .cta-section .container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 16px;
        }

        .cta-section h2 {
            color: #fff;
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.98rem;
            max-width: 520px;
            margin-bottom: 12px;
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-accent);
            color: #fff;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            transition: background-color var(--transition), transform var(--transition);
            white-space: nowrap;
            border: 1px solid var(--color-accent);
            text-decoration: none;
        }

        .btn-accent:hover {
            background-color: var(--color-accent-hover);
            border-color: var(--color-accent-hover);
            color: #fff;
            text-decoration: none;
        }

        /* ===== Footer ===== */
        .site-footer {
            background-color: var(--color-primary);
            color: var(--color-footer-text);
            padding: 48px 0 24px;
            margin-top: 0;
        }

        .site-footer .container {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1.5fr 1.5fr;
            gap: 32px;
        }

        .footer-brand .footer-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-nav h4,
        .footer-contact h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-nav {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-nav a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.88rem;
        }

        .footer-nav a:hover {
            color: #fff;
            text-decoration: none;
        }

        .footer-contact p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .footer-btns {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn-footer {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: transparent;
            border: 1px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            padding: 8px 16px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition), border-color var(--transition);
        }

        .btn-footer:hover {
            background-color: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            text-decoration: none;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-bottom .icp-info {
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-meta-links {
            display: flex;
            gap: 16px;
        }

        .footer-meta-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.82rem;
        }

        .footer-meta-links a:hover {
            color: #fff;
        }

        /* ===== Mobile Nav ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background-color: var(--color-primary);
            z-index: 99;
            padding: 12px 24px 24px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        .mobile-menu.active {
            display: block;
        }

        .mobile-menu a {
            display: block;
            color: rgba(255, 255, 255, 0.85);
            font-size: 1rem;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .mobile-menu a:last-child {
            border-bottom: none;
        }

        .mobile-menu a:hover {
            color: #fff;
            text-decoration: none;
        }

        .mobile-menu .mobile-divider {
            height: 1px;
            background-color: rgba(255, 255, 255, 0.1);
            margin: 4px 0;
            display: none;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .main-nav a {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
            .expert-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .header-cta {
                display: none;
            }
            .mobile-menu .mobile-divider {
                display: block;
            }
            .mobile-menu .mobile-cta {
                display: block;
                margin-top: 12px;
                background-color: var(--color-accent);
                color: #fff;
                text-align: center;
                padding: 12px;
                border-radius: var(--radius-sm);
            }
            .mobile-menu .mobile-cta:hover {
                background-color: var(--color-accent-hover);
                color: #fff;
                text-decoration: none;
            }

            .page-header h1 {
                font-size: 1.8rem;
            }
            .page-header .page-intro {
                font-size: 0.95rem;
            }
            .content-list-section .container {
                padding: 0 20px;
            }
            .guide-item {
                flex-direction: column;
                gap: 16px;
                padding: 16px;
            }
            .guide-number {
                width: 40px;
                height: 40px;
                min-width: 40px;
                font-size: 1rem;
            }
            .method-block {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .expert-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-header h1 {
                font-size: 1.5rem;
            }
            .content-list-section .container {
                padding: 0 16px;
            }
            .guide-content h3 {
                font-size: 1rem;
            }
            .tag-cloud .tag {
                font-size: 0.8rem;
                padding: 6px 14px;
            }
            .cta-section h2 {
                font-size: 1.3rem;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #1F3A31;
            --color-primary-hover: #2C5144;
            --color-bg: #F4EFE8;
            --color-accent: #E5483A;
            --color-accent-hover: #C63A2D;
            --color-gold: #D9A441;
            --color-text: #2A2A28;
            --color-text-muted: #74736D;
            --color-card-bg: #FFFFFF;
            --color-card-alt: #EDF3EE;
            --color-border: #E0D9CE;
            --color-footer-text: #EDEAE3;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-card: 0 2px 12px rgba(31, 58, 49, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(31, 58, 49, 0.16);
            --font-sans: '思源黑体', '阿里巴巴普惠体', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', monospace;
            --max-width: 1180px;
            --space-section: 72px;
            --space-section-mobile: 44px;
            --transition: 0.2s ease-out;
            --header-height: 68px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--color-primary-hover);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            background: none;
            border: none;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        /* ===== Header & Navigation ===== */
        .site-header {
            background-color: var(--color-primary);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 12px;
        }
        .site-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .site-logo:hover {
            color: #fff;
            text-decoration: none;
        }
        .site-logo .logo-dot {
            width: 8px;
            height: 8px;
            background-color: var(--color-accent);
            border-radius: 50%;
            display: inline-block;
            flex-shrink: 0;
            animation: pulse-dot 2.4s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(0.8); }
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0;
        }
        .main-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 0.92rem;
            padding: 8px 14px;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition);
        }
        .main-nav a:hover {
            color: #fff;
            text-decoration: none;
        }
        .main-nav a.active {
            color: #fff;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background-color: var(--color-accent);
            border-radius: 1px;
        }
        .nav-divider {
            width: 1px;
            height: 16px;
            background-color: rgba(255, 255, 255, 0.25);
            margin: 0 2px;
        }
        .header-cta {
            flex-shrink: 0;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-primary);
            color: #fff;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            padding: 12px 22px;
            transition: background-color var(--transition), transform var(--transition);
            white-space: nowrap;
            border: 1px solid var(--color-primary);
            text-decoration: none;
        }
        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            border-color: var(--color-primary-hover);
            color: #fff;
            text-decoration: none;
        }
        .btn-header {
            background-color: transparent;
            border: 1px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            padding: 8px 18px;
            font-size: 0.88rem;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition), border-color var(--transition), color var(--transition);
            white-space: nowrap;
        }
        .btn-header:hover {
            background-color: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            flex-shrink: 0;
        }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: #fff;
            border-radius: 1px;
            transition: transform var(--transition), opacity var(--transition);
        }
        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            padding: 20px 0 0;
            background-color: var(--color-bg);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--color-text-muted);
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
            text-decoration: underline;
        }
        .breadcrumb .separator {
            color: var(--color-border);
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 500;
        }
        /* ===== Page Header ===== */
        .page-head {
            padding: 40px 0 48px;
            background-color: var(--color-bg);
        }
        .page-head h1 {
            font-size: 2.5rem;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--color-text);
            margin: 0 0 16px;
        }
        .page-head .lead {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            line-height: 1.8;
            max-width: 820px;
            margin: 0;
        }
        /* ===== Section Base ===== */
        section {
            padding: var(--space-section) 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-accent);
            letter-spacing: 0.02em;
            margin-bottom: 12px;
            text-transform: none;
        }
        .section-label::before {
            content: '';
            display: inline-block;
            width: 18px;
            height: 2px;
            background-color: var(--color-accent);
            border-radius: 1px;
        }
        .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--color-text);
            margin: 0 0 20px;
        }
        /* ===== Industry List Cards ===== */
        .industry-list-section {
            background-color: var(--color-bg);
        }
        .industry-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .industry-card {
            background-color: var(--color-card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: box-shadow var(--transition), transform var(--transition);
            border: 1px solid var(--color-border);
            position: relative;
        }
        .industry-card::before {
            content: '';
            position: absolute;
            top: 16px;
            bottom: 16px;
            left: 0;
            width: 4px;
            background-color: var(--color-accent);
            border-radius: 0 2px 2px 0;
            z-index: 1;
        }
        .industry-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .industry-card .card-img {
            height: 200px;
            overflow: hidden;
            border-bottom: 1px solid var(--color-border);
        }
        .industry-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease-out;
        }
        .industry-card:hover .card-img img {
            transform: scale(1.03);
        }
        .industry-card .card-body {
            padding: 20px 22px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .industry-card .card-tag {
            display: inline-block;
            background-color: var(--color-card-alt);
            color: var(--color-primary);
            font-size: 0.78rem;
            font-weight: 500;
            border-radius: 999px;
            padding: 4px 12px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .industry-card .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin: 0 0 8px;
        }
        .industry-card .card-pain {
            font-size: 0.88rem;
            color: var(--color-accent);
            font-weight: 500;
            margin: 0 0 8px;
        }
        .industry-card .card-desc {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.75;
            margin: 0 0 14px;
            flex: 1;
        }
        .industry-card .card-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition);
        }
        .industry-card .card-link::after {
            content: '→';
            transition: transform var(--transition);
        }
        .industry-card .card-link:hover {
            color: var(--color-primary-hover);
            text-decoration: none;
        }
        .industry-card .card-link:hover::after {
            transform: translateX(3px);
        }
        .view-more-row {
            text-align: center;
            margin-top: 32px;
        }
        .btn-outline-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: transparent;
            color: var(--color-primary);
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            border: 1px solid var(--color-primary);
            transition: background-color var(--transition), color var(--transition);
            white-space: nowrap;
            text-decoration: none;
        }
        .btn-outline-primary:hover {
            background-color: #E8EEE9;
            border-color: var(--color-primary);
            color: var(--color-primary);
            text-decoration: none;
        }
        /* ===== Data Strip ===== */
        .data-strip-section {
            background-color: var(--color-card-alt);
            padding: 56px 0;
        }
        .data-strip {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            text-align: center;
        }
        .data-item {
            padding: 8px 16px;
        }
        .data-item .data-number {
            font-size: 2.8rem;
            font-weight: 700;
            line-height: 1.2;
            color: var(--color-accent);
            letter-spacing: -0.02em;
        }
        .data-item .data-number.gold {
            color: var(--color-gold);
        }
        .data-item .data-label {
            font-size: 0.92rem;
            color: var(--color-text-muted);
            margin-top: 8px;
            line-height: 1.6;
        }
        /* ===== Methodology ===== */
        .methodology-section {
            background-color: var(--color-bg);
        }
        .methodology-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .methodology-text h2 {
            font-size: 1.6rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin: 0 0 16px;
        }
        .methodology-text p {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            line-height: 1.85;
            margin: 0 0 14px;
        }
        .methodology-aside {
            background-color: var(--color-card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 24px 26px;
            align-self: start;
            border-left: 4px solid var(--color-gold);
        }
        .methodology-aside h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 12px;
        }
        .methodology-aside ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .methodology-aside ul li {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            padding: 8px 0 8px 20px;
            position: relative;
            line-height: 1.7;
        }
        .methodology-aside ul li::before {
            content: '▪';
            position: absolute;
            left: 0;
            color: var(--color-gold);
        }
        /* ===== Tag Cloud ===== */
        .tag-cloud-section {
            background-color: var(--color-card-alt);
            padding: 48px 0;
        }
        .tag-cloud-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .tag-cloud {
            display: inline-block;
            background-color: var(--color-card-bg);
            color: var(--color-primary);
            font-size: 0.85rem;
            font-weight: 500;
            border-radius: 999px;
            padding: 8px 18px;
            border: 1px solid var(--color-border);
            transition: background-color var(--transition), border-color var(--transition), color var(--transition);
            text-decoration: none;
        }
        .tag-cloud:hover {
            background-color: var(--color-primary);
            border-color: var(--color-primary);
            color: #fff;
            text-decoration: none;
        }
        /* ===== CTA Section ===== */
        .cta-section {
            background-color: var(--color-primary);
            padding: 64px 0;
        }
        .cta-inner {
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
        }
        .cta-inner h2 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            margin: 0 0 12px;
            letter-spacing: -0.01em;
        }
        .cta-inner p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.7;
            margin: 0 0 28px;
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-accent);
            color: #fff;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            border: 1px solid var(--color-accent);
            transition: background-color var(--transition), border-color var(--transition);
            white-space: nowrap;
            text-decoration: none;
        }
        .btn-accent:hover {
            background-color: var(--color-accent-hover);
            border-color: var(--color-accent-hover);
            color: #fff;
            text-decoration: none;
        }
        /* ===== Inquiry Form ===== */
        .inquiry-section {
            background-color: var(--color-bg);
        }
        .inquiry-form-wrap {
            background-color: var(--color-card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 36px 40px;
            max-width: 640px;
            margin: 0 auto;
            border: 1px solid var(--color-border);
        }
        .inquiry-form-wrap h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 8px;
            text-align: center;
        }
        .inquiry-form-wrap .form-hint {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            text-align: center;
            margin: 0 0 24px;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            background-color: #fff;
            border: 1px solid var(--color-primary);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 0.95rem;
            transition: border-color var(--transition), box-shadow var(--transition);
            outline: none;
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(229, 72, 58, 0.12);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 90px;
        }
        .btn-submit {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            background-color: var(--color-primary);
            color: #fff;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            padding: 12px 22px;
            border: 1px solid var(--color-primary);
            transition: background-color var(--transition), border-color var(--transition);
            white-space: nowrap;
            text-decoration: none;
        }
        .btn-submit:hover {
            background-color: var(--color-primary-hover);
            border-color: var(--color-primary-hover);
            color: #fff;
        }
        .privacy-note {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            text-align: center;
            margin-top: 14px;
            line-height: 1.6;
        }
        /* ===== Footer ===== */
        .site-footer {
            background-color: var(--color-primary);
            color: var(--color-footer-text);
            padding: 56px 0 28px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
            max-width: 280px;
            margin: 0;
        }
        .footer-nav h4,
        .footer-contact h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin: 0 0 14px;
        }
        .footer-nav {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-nav a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.88rem;
            transition: color var(--transition);
        }
        .footer-nav a:hover {
            color: #fff;
            text-decoration: none;
        }
        .footer-contact p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
            margin: 0 0 14px;
        }
        .footer-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .btn-footer {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: transparent;
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            font-size: 0.82rem;
            border-radius: var(--radius-sm);
            padding: 8px 16px;
            transition: background-color var(--transition), border-color var(--transition);
            white-space: nowrap;
            text-decoration: none;
        }
        .btn-footer:hover {
            background-color: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            text-decoration: none;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom .icp-info {
            display: block;
            margin-top: 4px;
        }
        .footer-meta-links {
            display: flex;
            gap: 18px;
        }
        .footer-meta-links a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            transition: color var(--transition);
        }
        .footer-meta-links a:hover {
            color: #fff;
        }
        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .main-nav a {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
            .nav-divider {
                margin: 0 0;
            }
            .industry-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }
            .methodology-content {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --space-section: 44px;
            }
            body {
                font-size: 14px;
            }
            .hamburger {
                display: flex;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background-color: var(--color-primary);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0;
                gap: 0;
                box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 24px;
                font-size: 0.95rem;
                color: rgba(255, 255, 255, 0.85);
            }
            .main-nav a.active::after {
                display: none;
            }
            .nav-divider {
                display: none;
            }
            .header-cta .btn-header {
                padding: 6px 12px;
                font-size: 0.78rem;
            }
            .site-logo {
                font-size: 1.15rem;
            }
            .page-head h1 {
                font-size: 1.9rem;
            }
            .page-head .lead {
                font-size: 0.92rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .industry-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .industry-card .card-img {
                height: 170px;
            }
            .industry-card .card-body {
                padding: 16px 18px 18px 22px;
            }
            .data-strip {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .data-item .data-number {
                font-size: 2.2rem;
            }
            .inquiry-form-wrap {
                padding: 24px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .methodology-content {
                gap: 18px;
            }
            .cta-inner h2 {
                font-size: 1.5rem;
            }
            .breadcrumb-bar {
                padding: 14px 0 0;
            }
        }
        @media (max-width: 520px) {
            .header-cta .btn-header {
                font-size: 0.72rem;
                padding: 5px 9px;
            }
            .site-logo {
                font-size: 1.05rem;
            }
            .hamburger {
                width: 34px;
                height: 34px;
            }
            .hamburger span {
                width: 18px;
            }
            .container {
                padding: 0 16px;
            }
            .page-head {
                padding: 28px 0 32px;
            }
            .page-head h1 {
                font-size: 1.6rem;
            }
            .industry-card .card-img {
                height: 150px;
            }
            .data-item .data-number {
                font-size: 1.9rem;
            }
            .cta-section {
                padding: 48px 0;
            }
        }

/* roulang page: category4 */
:root {
            --color-primary: #1F3A31;
            --color-primary-hover: #2C5144;
            --color-bg: #F4EFE8;
            --color-accent: #E5483A;
            --color-accent-hover: #C63A2D;
            --color-gold: #D9A441;
            --color-text: #2A2A28;
            --color-text-muted: #74736D;
            --color-card-bg: #FFFFFF;
            --color-card-alt: #EDF3EE;
            --color-border: #E0D9CE;
            --color-footer-text: #EDEAE3;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-card: 0 2px 12px rgba(31, 58, 49, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(31, 58, 49, 0.16);
            --font-sans: '思源黑体', '阿里巴巴普惠体', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', monospace;
            --max-width: 1180px;
            --space-section: 72px;
            --space-section-mobile: 44px;
            --transition: 0.2s ease-out;
            --header-height: 68px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            margin: 0;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--color-primary-hover);
            text-decoration: underline;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            background: none;
            border: none;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            background-color: var(--color-primary);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .site-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            text-decoration: none;
        }

        .site-logo:hover {
            color: #fff;
            text-decoration: none;
        }

        .site-logo .logo-dot {
            width: 8px;
            height: 8px;
            background-color: var(--color-accent);
            border-radius: 50%;
            display: inline-block;
            flex-shrink: 0;
            animation: pulse-dot 2.4s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 0;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 0.92rem;
            padding: 8px 14px;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition);
            text-decoration: none;
        }

        .main-nav a:hover {
            color: #fff;
            text-decoration: none;
        }

        .main-nav a.active {
            color: #fff;
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background-color: var(--color-accent);
            border-radius: 1px;
        }

        .nav-divider {
            width: 1px;
            height: 16px;
            background-color: rgba(255, 255, 255, 0.25);
            margin: 0 2px;
        }

        .header-cta {
            flex-shrink: 0;
            margin-left: 16px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-primary);
            color: #fff;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            padding: 12px 22px;
            transition: background-color var(--transition), transform var(--transition);
            white-space: nowrap;
            border: 1px solid var(--color-primary);
            text-decoration: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            border-color: var(--color-primary-hover);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
        }

        .btn-header {
            background-color: transparent;
            border: 1px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            padding: 8px 18px;
            font-size: 0.88rem;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition), border-color var(--transition), color var(--transition);
            text-decoration: none;
            display: inline-block;
        }

        .btn-header:hover {
            background-color: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            text-decoration: none;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .hamburger span {
            display: block;
            width: 100%;
            height: 2px;
            background-color: #fff;
            border-radius: 2px;
            transition: transform 0.3s, opacity 0.3s;
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-section {
            padding: 24px 0 8px;
            background-color: var(--color-bg);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--color-text-muted);
            list-style: none;
            padding: 0;
            margin: 0;
            gap: 6px;
        }

        .breadcrumb a {
            color: var(--color-text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--color-primary);
            text-decoration: underline;
        }

        .breadcrumb .separator {
            margin: 0 4px;
            color: #b0aba0;
        }

        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 500;
        }

        /* ===== Category Header ===== */
        .category-header {
            padding: 32px 0 40px;
            background-color: var(--color-bg);
        }

        .category-header .container {
            max-width: 880px;
        }

        .category-header h1 {
            font-size: 2.4rem;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--color-text);
            margin: 0 0 16px;
        }

        .category-header .lead {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            line-height: 1.8;
            max-width: 800px;
            margin: 0;
        }

        /* ===== Article List ===== */
        .article-list-section {
            padding: 48px 0;
            background-color: #fff;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .article-list-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 28px;
            color: var(--color-text);
            position: relative;
            padding-left: 14px;
        }

        .article-list-section .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background-color: var(--color-accent);
            border-radius: 2px;
        }

        .article-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .article-card {
            display: flex;
            background: var(--color-card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: box-shadow var(--transition), transform var(--transition);
            border: 1px solid #f0ede8;
        }

        .article-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .article-thumb {
            flex: 0 0 240px;
            height: 160px;
            overflow: hidden;
            background-color: #e9e4dc;
        }

        .article-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .article-card:hover .article-thumb img {
            transform: scale(1.03);
        }

        .article-info {
            flex: 1;
            padding: 18px 20px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .article-tag {
            display: inline-block;
            background-color: var(--color-card-alt);
            color: var(--color-primary);
            font-size: 0.75rem;
            padding: 3px 10px;
            border-radius: 20px;
            margin-bottom: 8px;
            font-weight: 500;
            border: 1px solid #dce5de;
            align-self: flex-start;
        }

        .article-info h3 {
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 1.4;
            margin: 0 0 8px;
            color: var(--color-text);
        }

        .article-info h3 a {
            color: var(--color-text);
            text-decoration: none;
            transition: color var(--transition);
        }

        .article-info h3 a:hover {
            color: var(--color-primary);
            text-decoration: underline;
        }

        .article-meta {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-bottom: 6px;
        }

        .article-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
            align-self: flex-start;
        }

        .article-link:hover {
            color: var(--color-primary-hover);
            text-decoration: underline;
        }

        /* ===== Data Brief ===== */
        .data-brief-section {
            padding: 56px 0;
            background-color: var(--color-bg);
        }

        .data-brief-section .container {
            max-width: 1000px;
        }

        .data-brief-grid {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            text-align: center;
        }

        .data-item {
            flex: 1 1 220px;
            max-width: 280px;
        }

        .data-number {
            font-size: 2.8rem;
            font-weight: 500;
            color: var(--color-accent);
            line-height: 1.2;
            margin-bottom: 8px;
            font-family: var(--font-sans);
        }

        .data-label {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* ===== Resource List ===== */
        .resource-section {
            padding: 56px 0;
            background-color: #fff;
            border-top: 1px solid var(--color-border);
        }

        .resource-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 24px;
            color: var(--color-text);
            position: relative;
            padding-left: 14px;
        }

        .resource-section .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background-color: var(--color-accent);
            border-radius: 2px;
        }

        .resource-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .resource-list li {
            padding: 14px 0;
            border-bottom: 1px solid #f0ece4;
        }

        .resource-list li:last-child {
            border-bottom: none;
        }

        .resource-list a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--color-text);
            font-size: 0.98rem;
            text-decoration: none;
            transition: color var(--transition);
        }

        .resource-list a:hover {
            color: var(--color-primary);
            text-decoration: underline;
        }

        .resource-list .resource-icon {
            display: inline-block;
            width: 8px;
            height: 8px;
            background-color: var(--color-gold);
            border-radius: 50%;
            margin-right: 10px;
            flex-shrink: 0;
        }

        .resource-title {
            display: flex;
            align-items: center;
        }

        .resource-arrow {
            color: var(--color-text-muted);
            font-size: 0.9rem;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 56px 0;
            background-color: var(--color-bg);
        }

        .faq-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 28px;
            color: var(--color-text);
            position: relative;
            padding-left: 14px;
        }

        .faq-section .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background-color: var(--color-accent);
            border-radius: 2px;
        }

        .faq-list details {
            background: var(--color-card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            margin-bottom: 12px;
            padding: 16px 20px;
            border-left: 3px solid var(--color-accent);
            transition: border-color var(--transition);
        }

        .faq-list details[open] {
            border-left-color: var(--color-gold);
        }

        .faq-list summary {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .faq-list summary::-webkit-details-marker {
            display: none;
        }

        .faq-list summary::after {
            content: '+';
            font-size: 1.4rem;
            font-weight: 300;
            color: var(--color-text-muted);
            transition: transform 0.2s ease;
        }

        .faq-list details[open] summary::after {
            content: '−';
            transform: rotate(180deg);
        }

        .faq-list .faq-answer {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            line-height: 1.75;
            padding-top: 10px;
            margin-top: 6px;
            border-top: 1px solid #f0ede8;
        }

        /* ===== CTA & Form ===== */
        .cta-form-section {
            padding: 56px 0;
            background-color: var(--color-primary);
            position: relative;
            overflow: hidden;
        }

        .cta-form-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: radial-gradient(circle at 20% 30%, rgba(255,255,255,0.04) 0%, transparent 30%),
                              radial-gradient(circle at 80% 70%, rgba(255,255,255,0.04) 0%, transparent 30%);
            pointer-events: none;
        }

        .cta-form-section .container {
            position: relative;
            z-index: 1;
            max-width: 700px;
            text-align: center;
        }

        .cta-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .cta-subtitle {
            font-size: 1rem;
            color: rgba(255,255,255,0.85);
            margin-bottom: 28px;
            line-height: 1.6;
        }

        .inquiry-form {
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.15);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: left;
            backdrop-filter: blur(6px);
        }

        .form-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 16px;
        }

        .form-group {
            flex: 1 1 200px;
            margin-bottom: 0;
        }

        .form-group label {
            display: block;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.9);
            margin-bottom: 4px;
            font-weight: 500;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            background-color: rgba(255,255,255,0.95);
            border: 1px solid rgba(255,255,255,0.3);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 0.9rem;
            color: var(--color-text);
            transition: border-color var(--transition), box-shadow var(--transition);
            outline: none;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(229,72,58,0.2);
        }

        .form-group textarea {
            resize: vertical;
            min-height: 90px;
        }

        .privacy-note {
            font-size: 0.8rem;
            color: rgba(255,255,255,0.6);
            margin-top: 10px;
            text-align: center;
        }

        .btn-submit {
            background-color: var(--color-accent);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: background-color var(--transition), transform var(--transition);
            cursor: pointer;
            display: inline-block;
            text-decoration: none;
        }

        .btn-submit:hover {
            background-color: var(--color-accent-hover);
            transform: translateY(-1px);
        }

        .text-center {
            text-align: center;
        }

        /* ===== Footer ===== */
        .site-footer {
            background-color: var(--color-primary);
            color: var(--color-footer-text);
            padding: 48px 0 24px;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand p {
            margin: 0;
            line-height: 1.7;
            color: rgba(255,255,255,0.75);
        }

        .footer-nav h4,
        .footer-contact h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .footer-nav a {
            display: block;
            color: rgba(255,255,255,0.75);
            margin-bottom: 6px;
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-nav a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .footer-contact p {
            margin: 0 0 12px;
            color: rgba(255,255,255,0.75);
            line-height: 1.7;
        }

        .footer-btns {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .btn-footer {
            display: inline-block;
            background-color: transparent;
            border: 1px solid rgba(255,255,255,0.4);
            color: #fff;
            padding: 6px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.85rem;
            text-decoration: none;
            transition: background-color var(--transition), border-color var(--transition), color var(--transition);
        }

        .btn-footer:hover {
            background-color: rgba(255,255,255,0.1);
            border-color: #fff;
            color: #fff;
            text-decoration: none;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.12);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: rgba(255,255,255,0.6);
        }

        .footer-meta-links {
            display: flex;
            gap: 18px;
        }

        .footer-meta-links a {
            color: rgba(255,255,255,0.6);
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-meta-links a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .icp-info {
            display: block;
            margin-top: 4px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: 1fr;
            }
            .article-thumb {
                flex-basis: 200px;
                height: 150px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .main-nav a {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 44px;
                --header-height: 60px;
            }

            .hamburger {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background-color: var(--color-primary);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px;
                gap: 4px;
                box-shadow: 0 8px 16px rgba(0,0,0,0.15);
                transform: translateY(-120%);
                transition: transform 0.3s ease;
                z-index: 99;
                max-height: calc(100vh - var(--header-height));
                overflow-y: auto;
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .main-nav a {
                font-size: 1rem;
                padding: 12px 0;
                width: 100%;
                border-bottom: 1px solid rgba(255,255,255,0.06);
            }

            .main-nav a.active::after {
                display: none;
            }

            .nav-divider {
                display: none;
            }

            .header-cta {
                margin-left: auto;
                margin-right: 12px;
            }

            .btn-header {
                padding: 6px 12px;
                font-size: 0.8rem;
            }

            .category-header h1 {
                font-size: 1.8rem;
            }

            .article-card {
                flex-direction: column;
            }

            .article-thumb {
                flex-basis: auto;
                height: 200px;
                width: 100%;
            }

            .article-info {
                padding: 16px;
            }

            .data-brief-grid {
                gap: 24px;
            }

            .data-number {
                font-size: 2rem;
            }

            .cta-title {
                font-size: 1.5rem;
            }

            .form-row {
                flex-direction: column;
                gap: 12px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .article-thumb {
                height: 160px;
            }

            .article-list-section .section-title,
            .resource-section .section-title,
            .faq-section .section-title {
                font-size: 1.3rem;
            }

            .faq-list summary {
                font-size: 0.95rem;
            }

            .cta-form-section {
                padding: 40px 0;
            }

            .inquiry-form {
                padding: 20px 16px;
            }
        }

/* roulang page: category5 */
:root {
  --color-primary: #1F3A31;
  --color-primary-hover: #2C5144;
  --color-bg: #F4EFE8;
  --color-accent: #E5483A;
  --color-accent-hover: #C63A2D;
  --color-gold: #D9A441;
  --color-text: #2A2A28;
  --color-text-muted: #74736D;
  --color-card-bg: #FFFFFF;
  --color-card-alt: #EDF3EE;
  --color-border: #E0D9CE;
  --color-footer-text: #EDEAE3;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 2px 12px rgba(31, 58, 49, 0.08);
  --shadow-card-hover: 0 8px 28px rgba(31, 58, 49, 0.16);
  --font-sans: '思源黑体', '阿里巴巴普惠体', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1180px;
  --space-section: 72px;
  --space-section-mobile: 44px;
  --transition: 0.2s ease-out;
  --header-height: 68px;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  margin: 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
  box-sizing: border-box;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--color-text);
}

p {
  margin: 0;
  color: var(--color-text);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header & Navigation ===== */
.site-header {
  background-color: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  text-decoration: none;
}

.site-logo:hover {
  color: #fff;
  text-decoration: none;
}

.site-logo .logo-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
  animation: pulse-dot 2.4s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0;
}

.main-nav a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.92rem;
  padding: 8px 14px;
  position: relative;
  white-space: nowrap;
  transition: color var(--transition);
  text-decoration: none;
}

.main-nav a:hover {
  color: #fff;
  text-decoration: none;
}

.main-nav a.active {
  color: #fff;
}

.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 14px;
  right: 14px;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 1px;
}

.nav-divider {
  width: 1px;
  height: 16px;
  background-color: rgba(255, 255, 255, 0.25);
  margin: 0 2px;
}

.header-cta {
  flex-shrink: 0;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: #fff;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  padding: 12px 22px;
  transition: background-color var(--transition), transform var(--transition);
  white-space: nowrap;
  border: 1px solid var(--color-primary);
  text-decoration: none;
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #fff;
  text-decoration: none;
}

.btn-header {
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: #fff;
  padding: 8px 18px;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), border-color var(--transition);
  text-decoration: none;
}

.btn-header:hover {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
  text-decoration: none;
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  align-items: center;
  z-index: 110;
}

.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background-color: #fff;
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* ===== Breadcrumb ===== */
.breadcrumb-section {
  padding: 28px 0 0;
  background-color: var(--color-bg);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

.breadcrumb .separator {
  color: var(--color-border);
  font-size: 0.75rem;
}

.breadcrumb .current {
  color: var(--color-text);
  font-weight: 500;
}

/* ===== Category Hero ===== */
.category-hero {
  padding: 36px 0 44px;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.category-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: end;
}

.category-hero-title {
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-primary);
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 16px;
}

.category-hero-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 4px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.category-hero-desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 620px;
}

.category-hero-visual {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.mini-stat-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.85rem;
  color: var(--color-text);
  box-shadow: var(--shadow-card);
  white-space: nowrap;
}

.mini-stat-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
}

.mini-stat-badge .dot.gold {
  background-color: var(--color-gold);
}

/* ===== Section Common ===== */
.section {
  padding: var(--space-section) 0;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  line-height: 1.7;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.section-header-left {
  flex: 1;
  min-width: 280px;
}

.section-header-right {
  flex-shrink: 0;
}

.text-link {
  color: var(--color-primary);
  font-weight: 500;
  font-size: 0.92rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition);
}

.text-link::after {
  content: '→';
  font-size: 1rem;
  line-height: 1;
  transition: transform var(--transition);
}

.text-link:hover {
  color: var(--color-primary-hover);
  text-decoration: none;
}

.text-link:hover::after {
  transform: translateX(3px);
}

/* ===== Data Report List ===== */
.data-report-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.report-card {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  background-color: var(--color-card-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
  color: var(--color-text);
}

.report-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
  text-decoration: none;
  color: var(--color-text);
}

.report-thumb {
  width: 240px;
  height: 160px;
  flex-shrink: 0;
  overflow: hidden;
  border-radius: 8px 0 0 8px;
  background-color: var(--color-card-alt);
}

.report-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.report-card:hover .report-thumb img {
  transform: scale(1.03);
}

.report-body {
  padding: 18px 20px 18px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.report-tag {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-card-alt);
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 10px;
  width: fit-content;
  letter-spacing: 0.02em;
}

.report-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.4;
}

.report-summary {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.report-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.report-meta .date {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.report-meta .date::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--color-gold);
  display: inline-block;
}

.report-read {
  font-weight: 500;
  color: var(--color-primary);
  font-size: 0.82rem;
  text-decoration: none;
  transition: color var(--transition);
  margin-left: auto;
}

.report-read:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

/* ===== Data Snapshot Strip ===== */
.data-snapshot-section {
  background-color: var(--color-primary);
  padding: var(--space-section) 0;
}

.data-snapshot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.snapshot-item {
  text-align: center;
}

.snapshot-value {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 8px;
}

.snapshot-value .accent {
  color: var(--color-gold);
}

.snapshot-value .red {
  color: #FF8A80;
}

.snapshot-label {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.6;
}

.snapshot-divider {
  width: 1px;
  background-color: rgba(255, 255, 255, 0.2);
  margin: 8px 0;
}

/* ===== Methodology Section ===== */
.methodology-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.methodology-text {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.methodology-text p {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.8;
  margin: 0;
}

.methodology-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.methodology-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.methodology-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.methodology-card li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--color-text);
  line-height: 1.7;
}

.methodology-card li::before {
  content: '';
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
  margin-top: 10px;
}

/* ===== Tag Cloud ===== */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 0.88rem;
  font-weight: 400;
  padding: 8px 18px;
  border-radius: 999px;
  transition: all var(--transition);
  text-decoration: none;
  cursor: default;
}

.tag-item:hover {
  background-color: var(--color-card-alt);
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
}

.tag-item .tag-count {
  margin-left: 8px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background-color: var(--color-bg);
  border-radius: 999px;
  padding: 1px 8px;
}

/* ===== Related Resources ===== */
.resource-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  background-color: var(--color-card-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.resource-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition);
  text-decoration: none;
  color: var(--color-text);
}

.resource-item:last-child {
  border-bottom: none;
}

.resource-item:hover {
  background-color: var(--color-card-alt);
  text-decoration: none;
  color: var(--color-text);
}

.resource-num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  width: 28px;
  flex-shrink: 0;
  text-align: right;
}

.resource-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  flex: 1;
  line-height: 1.5;
}

.resource-item .arrow {
  color: var(--color-primary);
  font-size: 1rem;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.resource-item:hover .arrow {
  transform: translateX(3px);
}

/* ===== CTA Banner ===== */
.cta-banner {
  background-color: var(--color-primary);
  padding: 64px 0;
  text-align: center;
  border-radius: 0;
}

.cta-banner-inner {
  max-width: 600px;
  margin: 0 auto;
}

.cta-banner h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.cta-banner p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 28px;
  line-height: 1.7;
}

.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent);
  color: #fff;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  padding: 12px 26px;
  transition: background-color var(--transition), transform var(--transition);
  white-space: nowrap;
  border: 1px solid var(--color-accent);
  text-decoration: none;
}

.btn-accent:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
  text-decoration: none;
}

/* ===== Footer ===== */
.site-footer {
  background-color: var(--color-primary);
  color: var(--color-footer-text);
  padding: 56px 0 0;
  margin-top: 0;
}

.site-footer .container {
  max-width: var(--max-width);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.4fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-brand .footer-logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 300px;
  margin: 0;
}

.footer-nav h4,
.footer-contact h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-contact p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.9rem;
  line-height: 1.7;
  margin: 0 0 16px;
}

.footer-btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-footer {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: #fff;
  padding: 8px 18px;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), border-color var(--transition);
  text-decoration: none;
}

.btn-footer:hover {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
  text-decoration: none;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 20px 0 28px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-bottom a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-meta-links {
  display: flex;
  gap: 16px;
  align-items: center;
}

/* ===== Mobile Nav Overlay ===== */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-primary);
  z-index: 95;
  padding: 32px 24px;
  flex-direction: column;
  gap: 0;
  overflow-y: auto;
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav a {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.1rem;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: color var(--transition);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: #fff;
  text-decoration: none;
}

.mobile-nav a.active::after {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
}

.mobile-nav .mobile-cta {
  margin-top: 24px;
  border-bottom: none;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .main-nav a {
    font-size: 0.82rem;
    padding: 8px 9px;
  }
  .nav-divider {
    margin: 0 0;
  }
  .category-hero-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .category-hero-visual {
    justify-content: flex-start;
  }
  .data-snapshot-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
  .methodology-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .report-card {
    grid-template-columns: 200px 1fr;
  }
  .report-thumb {
    width: 200px;
    height: 150px;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: var(--space-section-mobile);
    --header-height: 60px;
  }
  body {
    font-size: 14px;
  }
  .container {
    padding: 0 18px;
  }
  .main-nav {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .header-cta .btn-header {
    display: none;
  }
  .category-hero {
    padding: 24px 0 32px;
  }
  .category-hero-title {
    font-size: 1.8rem;
  }
  .report-card {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .report-thumb {
    width: 100%;
    height: 180px;
    border-radius: 8px 8px 0 0;
  }
  .report-body {
    padding: 16px 18px;
  }
  .report-meta {
    flex-wrap: wrap;
    gap: 8px;
  }
  .report-read {
    margin-left: 0;
  }
  .data-snapshot-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .snapshot-value {
    font-size: 2.2rem;
  }
  .cta-banner {
    padding: 44px 0;
  }
  .cta-banner h2 {
    font-size: 1.5rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 520px) {
  .data-snapshot-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .snapshot-value {
    font-size: 2rem;
  }
  .category-hero-title {
    font-size: 1.6rem;
  }
  .report-summary {
    -webkit-line-clamp: 3;
  }
  .mini-stat-badge {
    font-size: 0.75rem;
    padding: 6px 12px;
  }
}

/* roulang page: category6 */
:root {
            --color-primary: #1F3A31;
            --color-primary-hover: #2C5144;
            --color-bg: #F4EFE8;
            --color-accent: #E5483A;
            --color-accent-hover: #C63A2D;
            --color-gold: #D9A441;
            --color-text: #2A2A28;
            --color-text-muted: #74736D;
            --color-card-bg: #FFFFFF;
            --color-card-alt: #EDF3EE;
            --color-border: #E0D9CE;
            --color-footer-text: #EDEAE3;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-card: 0 2px 12px rgba(31, 58, 49, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(31, 58, 49, 0.16);
            --font-sans: '思源黑体', '阿里巴巴普惠体', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', monospace;
            --max-width: 1180px;
            --space-section: 72px;
            --space-section-mobile: 44px;
            --transition: 0.2s ease-out;
            --header-height: 68px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--color-primary-hover);
            text-decoration: underline;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            background: none;
            border: none;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            background-color: var(--color-primary);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .site-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .site-logo:hover {
            color: #fff;
            text-decoration: none;
        }
        .site-logo .logo-dot {
            width: 8px;
            height: 8px;
            background-color: var(--color-accent);
            border-radius: 50%;
            display: inline-block;
            flex-shrink: 0;
            animation: pulse-dot 2.4s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.55; transform: scale(0.8); }
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0;
        }
        .main-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 0.92rem;
            padding: 8px 14px;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition);
        }
        .main-nav a:hover {
            color: #fff;
            text-decoration: none;
        }
        .main-nav a.active {
            color: #fff;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background-color: var(--color-accent);
            border-radius: 1px;
        }
        .nav-divider {
            width: 1px;
            height: 16px;
            background-color: rgba(255, 255, 255, 0.25);
            margin: 0 2px;
        }
        .header-cta {
            flex-shrink: 0;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-primary);
            color: #fff;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            padding: 12px 22px;
            transition: background-color var(--transition), transform var(--transition);
            white-space: nowrap;
            border: 1px solid var(--color-primary);
            text-decoration: none;
        }
        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            border-color: var(--color-primary-hover);
            color: #fff;
            text-decoration: none;
        }
        .btn-header {
            background-color: transparent;
            border: 1px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            padding: 8px 18px;
            font-size: 0.88rem;
        }
        .btn-header:hover {
            background-color: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
            background: transparent;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 100%;
            height: 2px;
            background-color: #fff;
            border-radius: 1px;
            transition: all var(--transition);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-section {
            padding: 20px 0 0;
            background-color: var(--color-bg);
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb-nav a {
            color: var(--color-text-muted);
        }
        .breadcrumb-nav a:hover {
            color: var(--color-primary);
            text-decoration: none;
        }
        .breadcrumb-nav .breadcrumb-sep {
            color: var(--color-border);
        }
        .breadcrumb-nav .breadcrumb-current {
            color: var(--color-primary);
            font-weight: 500;
        }

        /* ===== Category Hero ===== */
        .category-hero {
            padding: 36px 0 28px;
            background-color: var(--color-bg);
        }
        .category-hero h1 {
            font-size: 2.4rem;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--color-primary);
            margin-bottom: 16px;
        }
        .category-hero .hero-description {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            max-width: 820px;
            line-height: 1.8;
        }

        /* ===== Data List Section ===== */
        .data-list-section {
            padding: 32px 0 56px;
            background-color: var(--color-bg);
        }
        .data-list-card {
            background: var(--color-card-bg);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            margin-bottom: 20px;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
            display: flex;
            gap: 24px;
            align-items: flex-start;
        }
        .data-list-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .data-list-card .data-thumb {
            flex-shrink: 0;
            width: 180px;
            height: 120px;
            border-radius: var(--radius-sm);
            object-fit: cover;
        }
        .data-list-card .data-info {
            flex: 1;
            min-width: 0;
        }
        .data-list-card .badge-row {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 8px;
        }
        .badge-tag {
            display: inline-block;
            background-color: var(--color-card-alt);
            color: var(--color-primary);
            font-size: 0.75rem;
            padding: 2px 10px;
            border-radius: 20px;
            font-weight: 500;
        }
        .badge-tag--gold {
            background-color: rgba(217, 164, 65, 0.15);
            color: #a1782a;
        }
        .badge-tag--red {
            background-color: rgba(229, 72, 58, 0.1);
            color: var(--color-accent);
        }
        .data-list-card h2 {
            font-size: 1.3rem;
            font-weight: 700;
            line-height: 1.4;
            color: var(--color-text);
            margin-bottom: 8px;
        }
        .data-list-card .data-summary {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 10px;
        }
        .data-list-card .data-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
        }
        .data-list-card .data-meta a {
            font-weight: 500;
            color: var(--color-primary);
        }
        .data-list-card .data-meta a:hover {
            color: var(--color-primary-hover);
            text-decoration: none;
        }

        /* ===== Data Snapshot Section ===== */
        .data-snapshot-section {
            padding: var(--space-section) 0;
            background-color: var(--color-primary);
        }
        .data-snapshot-section .section-label {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            letter-spacing: 0.02em;
            margin-bottom: 28px;
        }
        .snapshot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .snapshot-item {
            text-align: left;
            border-left: 3px solid var(--color-accent);
            padding-left: 20px;
        }
        .snapshot-item .snapshot-number {
            font-size: 2.6rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: -0.02em;
        }
        .snapshot-item .snapshot-number em {
            font-size: 1.2rem;
            color: var(--color-gold);
            font-style: normal;
            font-weight: 500;
        }
        .snapshot-item .snapshot-label {
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.9rem;
            line-height: 1.5;
        }

        /* ===== Tag Cloud Section ===== */
        .tag-cloud-section {
            padding: var(--space-section) 0;
            background-color: var(--color-bg);
        }
        .section-title {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.3;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .section-title::before {
            content: '';
            width: 4px;
            height: 28px;
            background-color: var(--color-accent);
            border-radius: 2px;
            flex-shrink: 0;
        }
        .section-subtitle {
            color: var(--color-text-muted);
            font-size: 1rem;
            margin-bottom: 32px;
        }
        .tag-cloud-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .tag-cloud-item {
            display: inline-block;
            background-color: var(--color-card-bg);
            border: 1px solid var(--color-border);
            color: var(--color-primary);
            font-size: 0.9rem;
            padding: 8px 18px;
            border-radius: 20px;
            transition: all var(--transition);
            text-decoration: none;
        }
        .tag-cloud-item:hover {
            background-color: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            text-decoration: none;
        }

        /* ===== Methodology Section ===== */
        .method-section {
            padding: var(--space-section) 0;
            background-color: var(--color-card-alt);
        }
        .method-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .method-card {
            background: var(--color-card-bg);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            box-shadow: var(--shadow-card);
        }
        .method-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 10px;
        }
        .method-card p {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            line-height: 1.75;
            margin-bottom: 0;
        }
        .method-card .method-index {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            background-color: var(--color-primary);
            color: #fff;
            border-radius: 50%;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: var(--space-section) 0;
            background-color: var(--color-bg);
        }
        .cta-banner {
            background-color: var(--color-primary);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner h2 {
            color: #fff;
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }
        .cta-banner p {
            color: rgba(255, 255, 255, 0.78);
            font-size: 1rem;
            margin-bottom: 28px;
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-accent);
            color: #fff;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            transition: background-color var(--transition);
            border: none;
            text-decoration: none;
        }
        .btn-accent:hover {
            background-color: var(--color-accent-hover);
            color: #fff;
            text-decoration: none;
        }

        /* ===== Footer ===== */
        .site-footer {
            background-color: var(--color-primary);
            color: var(--color-footer-text);
            padding: 56px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }
        .footer-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-logo .logo-dot {
            width: 8px;
            height: 8px;
            background-color: var(--color-accent);
            border-radius: 50%;
            display: inline-block;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-nav h4,
        .footer-contact h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-nav {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-nav a {
            color: rgba(255, 255, 255, 0.68);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-nav a:hover {
            color: #fff;
            text-decoration: none;
        }
        .footer-contact p {
            color: rgba(255, 255, 255, 0.68);
            font-size: 0.9rem;
            margin-bottom: 16px;
        }
        .footer-btns {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .btn-footer {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: transparent;
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .btn-footer:hover {
            background-color: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            text-decoration: none;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 16px;
            padding: 20px 0 28px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom .icp-info {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-meta-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .footer-meta-links a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.82rem;
        }
        .footer-meta-links a:hover {
            color: #fff;
            text-decoration: none;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .main-nav a {
                font-size: 0.82rem;
                padding: 8px 8px;
            }
            .main-nav a.active::after {
                left: 8px;
                right: 8px;
            }
            .nav-divider {
                margin: 0 0;
            }
            .snapshot-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .method-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .data-list-card {
                flex-direction: column;
                gap: 16px;
            }
            .data-list-card .data-thumb {
                width: 100%;
                height: 180px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 44px;
                --header-height: 60px;
            }
            .container {
                padding: 0 16px;
            }
            .site-logo {
                font-size: 1.15rem;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background-color: var(--color-primary);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: 0 8px 20px rgba(0,0,0,0.2);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 0;
                font-size: 0.95rem;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a.active::after {
                display: none;
            }
            .nav-divider {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .header-cta {
                display: none;
            }
            .category-hero h1 {
                font-size: 1.7rem;
            }
            .category-hero .hero-description {
                font-size: 0.95rem;
            }
            .data-list-card {
                padding: 16px;
            }
            .data-list-card h2 {
                font-size: 1.1rem;
            }
            .snapshot-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .snapshot-item .snapshot-number {
                font-size: 2.2rem;
            }
            .method-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .method-card {
                padding: 16px 20px;
            }
            .cta-banner {
                padding: 32px 20px;
            }
            .cta-banner h2 {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-bottom: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.45rem;
            }
            .data-list-card .data-thumb {
                height: 140px;
            }
            .badge-tag {
                font-size: 0.7rem;
                padding: 2px 8px;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .cta-banner h2 {
                font-size: 1.25rem;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}