/* roulang page: index */
:root {
            --primary: #1e3a5f;
            --primary-light: #2a4e7a;
            --primary-dark: #142a45;
            --accent: #d4a04a;
            --accent-light: #e8b95e;
            --accent-dark: #b8893a;
            --bg-light: #f8f7f4;
            --bg-card: #ffffff;
            --text-dark: #1a1a2e;
            --text-body: #3d4050;
            --text-muted: #7a7d8a;
            --border-light: #e8e6e1;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.08);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
            background: var(--bg-light);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .section-padding { padding: 80px 0; }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 48px auto;
            text-align: center;
        }
        /* 悬浮胶囊导航 */
        .nav-float {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1000;
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: 56px;
            box-shadow: 0 4px 24px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            padding: 8px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            max-width: 1200px;
            width: calc(100% - 48px);
            border: 1px solid rgba(255,255,255,0.3);
            transition: var(--transition);
        }
        .nav-float.scrolled {
            background: rgba(255,255,255,0.95);
            box-shadow: 0 8px 32px rgba(0,0,0,0.1);
        }
        .nav-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .nav-logo i { color: var(--accent); font-size: 1.3rem; }
        .nav-links { display: flex; align-items: center; gap: 8px; list-style: none; }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover { background: rgba(30,58,95,0.06); color: var(--primary); }
        .nav-links a.active { background: var(--primary); color: #fff; }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--primary); cursor: pointer; padding: 4px; }
        @media (max-width: 768px) {
            .nav-float { top: 12px; padding: 8px 16px; width: calc(100% - 24px); border-radius: 40px; }
            .nav-links { display: none; position: absolute; top: calc(100% + 8px); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); border-radius: 24px; box-shadow: var(--shadow-lg); padding: 12px 16px; flex-direction: column; gap: 4px; border: 1px solid var(--border-light); }
            .nav-links.open { display: flex; }
            .nav-links a { width: 100%; padding: 12px 16px; }
            .nav-toggle { display: block; }
        }
        /* Hero */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(30,58,95,0.85) 0%, rgba(20,42,69,0.92) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            color: #fff;
            text-align: center;
            padding: 140px 24px 80px;
        }
        .hero-content { max-width: 800px; position: relative; z-index: 2; }
        .hero-badge {
            display: inline-block;
            background: rgba(212,160,74,0.2);
            border: 1px solid rgba(212,160,74,0.3);
            border-radius: 40px;
            padding: 6px 20px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--accent-light);
            letter-spacing: 0.02em;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.15);
        }
        .hero-title span { color: var(--accent); }
        .hero-desc {
            font-size: 1.2rem;
            line-height: 1.8;
            color: rgba(255,255,255,0.85);
            max-width: 640px;
            margin: 0 auto 36px;
        }
        .hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .btn-primary {
            display: inline-flex; align-items: center; gap: 8px;
            background: var(--accent); color: var(--primary-dark); font-weight: 600;
            padding: 14px 32px; border-radius: 50px; border: none; cursor: pointer;
            transition: var(--transition); font-size: 1rem;
        }
        .btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,160,74,0.3); }
        .btn-outline {
            display: inline-flex; align-items: center; gap: 8px;
            background: transparent; color: #fff; font-weight: 500;
            padding: 14px 32px; border-radius: 50px; border: 1.5px solid rgba(255,255,255,0.3); cursor: pointer;
            transition: var(--transition); font-size: 1rem;
        }
        .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.6); transform: translateY(-2px); }
        @media (max-width: 768px) {
            .hero-title { font-size: 2.2rem; }
            .hero-desc { font-size: 1rem; }
            .hero-btns { flex-direction: column; align-items: center; }
            .section-title { font-size: 1.6rem; }
            .section-padding { padding: 56px 0; }
        }
        /* 服务卡片 */
        .service-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 28px; }
        .service-card {
            background: var(--bg-card); border-radius: var(--radius-md); padding: 32px 24px;
            box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
            transition: var(--transition); text-align: center;
        }
        .service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(212,160,74,0.2); }
        .service-icon { width: 64px; height: 64px; border-radius: 50%; background: rgba(30,58,95,0.06); display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; font-size: 1.6rem; color: var(--accent); transition: var(--transition); }
        .service-card:hover .service-icon { background: var(--primary); color: #fff; }
        .service-card h3 { font-size: 1.2rem; font-weight: 600; color: var(--primary); margin-bottom: 10px; }
        .service-card p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.7; }
        /* 特色板块 */
        .feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; }
        .feature-card { display: flex; gap: 16px; align-items: flex-start; background: var(--bg-card); padding: 28px 24px; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); }
        .feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .feature-icon { flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px; background: rgba(212,160,74,0.1); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; color: var(--accent); }
        .feature-card h4 { font-size: 1.05rem; font-weight: 600; color: var(--primary); margin-bottom: 6px; }
        .feature-card p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.6; }
        /* 流程 */
        .steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; counter-reset: step; }
        .step-card { background: var(--bg-card); border-radius: var(--radius-md); padding: 32px 20px; text-align: center; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); position: relative; transition: var(--transition); }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .step-num { width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; font-weight: 700; margin: 0 auto 16px; }
        .step-card h4 { font-size: 1.05rem; font-weight: 600; color: var(--primary); margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }
        /* CMS 列表 */
        .news-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
        .news-card { background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); }
        .news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .news-card img { width: 100%; height: 180px; object-fit: cover; }
        .news-body { padding: 20px; }
        .news-body .tag { display: inline-block; background: rgba(212,160,74,0.12); color: var(--accent-dark); font-size: 0.75rem; font-weight: 600; padding: 3px 12px; border-radius: 20px; margin-bottom: 10px; }
        .news-body h4 { font-size: 1.05rem; font-weight: 600; color: var(--primary); margin-bottom: 8px; line-height: 1.5; }
        .news-body p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 12px; }
        .news-body .meta { font-size: 0.8rem; color: var(--text-muted); display: flex; align-items: center; gap: 12px; }
        .news-empty { text-align: center; padding: 60px 24px; color: var(--text-muted); font-size: 1.05rem; background: var(--bg-card); border-radius: var(--radius-md); border: 1px dashed var(--border-light); }
        /* 数据统计 */
        .stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 24px; }
        .stat-item { text-align: center; padding: 32px 16px; background: rgba(255,255,255,0.06); border-radius: var(--radius-md); border: 1px solid rgba(255,255,255,0.08); backdrop-filter: blur(4px); }
        .stat-num { font-size: 2.6rem; font-weight: 800; color: var(--accent); line-height: 1.1; margin-bottom: 6px; }
        .stat-label { font-size: 0.95rem; color: rgba(255,255,255,0.8); }
        /* FAQ */
        .faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { background: var(--bg-card); border-radius: var(--radius-md); border: 1px solid var(--border-light); overflow: hidden; transition: var(--transition); }
        .faq-item:hover { border-color: rgba(212,160,74,0.2); }
        .faq-q { padding: 18px 24px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 500; color: var(--primary); font-size: 1rem; background: none; border: none; width: 100%; text-align: left; transition: var(--transition); }
        .faq-q:hover { background: rgba(30,58,95,0.02); }
        .faq-q i { transition: var(--transition); color: var(--accent); }
        .faq-item.open .faq-q i { transform: rotate(180deg); }
        .faq-a { padding: 0 24px; max-height: 0; overflow: hidden; transition: var(--transition); color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; }
        .faq-item.open .faq-a { padding: 0 24px 18px; max-height: 300px; }
        /* CTA */
        .cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: #fff; text-align: center; padding: 80px 24px; }
        .cta-section h2 { font-size: 2rem; font-weight: 700; margin-bottom: 16px; }
        .cta-section p { font-size: 1.1rem; color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto 32px; }
        /* Footer */
        .site-footer { background: var(--primary-dark); color: rgba(255,255,255,0.7); padding: 48px 0 32px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
        .footer-brand .nav-logo { color: #fff; margin-bottom: 12px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer-col h5 { color: #fff; font-weight: 600; margin-bottom: 16px; font-size: 1rem; }
        .footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
        .footer-col a { font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: var(--transition); }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 24px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; font-size: 0.85rem; color: rgba(255,255,255,0.4); }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer-brand { grid-column: 1 / -1; }
            .cta-section h2 { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .service-grid { grid-template-columns: 1fr; }
            .feature-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .news-list { grid-template-columns: 1fr; }
        }
        /* 波形装饰 */
        .wave-divider { position: relative; height: 60px; overflow: hidden; margin-top: -2px; }
        .wave-divider svg { position: absolute; bottom: 0; width: 100%; height: 60px; }
        /* 背景色区块 */
        .bg-soft { background: #f0ede8; }
        .bg-white { background: #fff; }
        .bg-deep { background: var(--primary); color: #fff; }
        .bg-deep .section-title { color: #fff; }
        .bg-deep .section-subtitle { color: rgba(255,255,255,0.7); }
        .text-accent { color: var(--accent); }
        .border-accent { border-color: rgba(212,160,74,0.2); }
        /* 响应式微调 */
        @media (max-width: 1024px) {
            .hero-title { font-size: 2.6rem; }
        }
        @media (max-width: 480px) {
            .hero-title { font-size: 1.8rem; }
            .section-title { font-size: 1.4rem; }
            .step-card { padding: 24px 16px; }
            .stat-num { font-size: 2rem; }
        }
        /* 滚动状态 JS 辅助 */
        .nav-float.scrolled { background: rgba(255,255,255,0.96); }

/* roulang page: article */
:root {
            --primary: #1e3a5f;
            --primary-light: #2a5298;
            --primary-dark: #0f2440;
            --primary-bg: #f0f4fa;
            --accent: #c0392b;
            --accent-light: #e74c3c;
            --accent-dark: #962d22;
            --text: #1a1a2e;
            --text-soft: #4a4a6a;
            --text-muted: #8a8aaa;
            --border: #e2e8f0;
            --radius: 0.75rem;
            --radius-lg: 1rem;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: var(--text);
            background: #ffffff;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .nav-float {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: calc(100% - 40px);
            max-width: 1160px;
            padding: 10px 28px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: 60px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.5);
            transition: var(--transition);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
        }
        .nav-logo i {
            font-size: 1.4rem;
            color: var(--accent);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links li a {
            display: block;
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-soft);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links li a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .nav-links li a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 12px rgba(30, 58, 95, 0.25);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        @media (max-width: 768px) {
            .nav-float {
                top: 12px;
                padding: 10px 18px;
                width: calc(100% - 24px);
                border-radius: 40px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 8px);
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                border-radius: 24px;
                padding: 12px 16px;
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
                border: 1px solid var(--border);
                gap: 4px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li a {
                padding: 12px 18px;
                font-size: 1rem;
                width: 100%;
                text-align: center;
            }
        }

        /* ===== 文章页 ===== */
        .article-hero {
            position: relative;
            padding: 140px 0 60px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-hero h1 {
            font-size: 2.4rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            max-width: 860px;
            margin: 0 auto 16px;
            letter-spacing: 0.5px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.9rem;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i {
            font-size: 0.85rem;
        }
        .article-meta .category-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.18);
            padding: 4px 16px;
            border-radius: 40px;
            color: #fff;
            font-weight: 500;
            font-size: 0.85rem;
            backdrop-filter: blur(4px);
        }

        .article-body-wrap {
            padding: 60px 0 80px;
            background: #fff;
        }
        .article-body {
            max-width: 800px;
            margin: 0 auto;
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            color: var(--primary);
            font-weight: 700;
            margin-top: 2em;
            margin-bottom: 0.8em;
            line-height: 1.4;
        }
        .article-body h2 {
            font-size: 1.6rem;
            border-bottom: 2px solid var(--primary-bg);
            padding-bottom: 0.4em;
        }
        .article-body h3 {
            font-size: 1.3rem;
        }
        .article-body p {
            margin-bottom: 1.2em;
        }
        .article-body ul,
        .article-body ol {
            margin: 1em 0 1.2em 1.8em;
        }
        .article-body li {
            margin-bottom: 0.4em;
        }
        .article-body a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--accent);
        }
        .article-body img {
            border-radius: var(--radius-lg);
            margin: 2em auto;
            box-shadow: var(--shadow);
        }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: var(--primary-bg);
            padding: 1.2em 1.6em;
            margin: 1.6em 0;
            border-radius: 0 var(--radius) var(--radius) 0;
            color: var(--text-soft);
            font-style: italic;
        }
        .article-body code {
            background: var(--neutral-100);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--accent-dark);
        }
        .article-body pre {
            background: var(--neutral-900);
            color: #e8e8e8;
            padding: 1.4em 1.6em;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 1.6em 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found i {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .article-not-found h2 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-soft);
            margin-bottom: 24px;
        }
        .article-not-found .btn-back {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 40px;
            font-weight: 500;
            transition: var(--transition);
        }
        .article-not-found .btn-back:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            background: var(--primary-bg);
            padding: 60px 0;
        }
        .related-section .section-title {
            text-align: center;
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 40px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .related-card .card-body {
            padding: 18px 20px 22px;
        }
        .related-card .card-body h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.88rem;
            color: var(--text-soft);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .related-card .card-meta a {
            color: var(--primary-light);
            font-weight: 500;
        }
        .related-card .card-meta a:hover {
            color: var(--accent);
        }

        @media (max-width: 768px) {
            .article-hero {
                padding: 120px 0 40px;
            }
            .article-hero h1 {
                font-size: 1.6rem;
            }
            .article-body {
                font-size: 0.98rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .article-meta {
                flex-direction: column;
                align-items: center;
                gap: 10px;
            }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px 20px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 骨架屏 / 微交互动效 ===== */
        .fade-in {
            animation: fadeIn 0.6s ease forwards;
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(16px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .btn-accent {
            display: inline-block;
            padding: 12px 32px;
            background: var(--accent);
            color: #fff;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(192, 57, 43, 0.3);
        }
        .btn-outline {
            display: inline-block;
            padding: 10px 28px;
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--primary-bg);
            color: var(--primary);
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
        }

/* roulang page: category1 */
:root {
            --primary: #1a2a4a;
            --primary-light: #2d4a7a;
            --primary-lighter: #e8edf5;
            --gold: #d4a84b;
            --gold-light: #f0d68a;
            --gold-dark: #b8922e;
            --accent: #10b981;
            --bg: #f7f9fc;
            --bg-warm: #fefcf7;
            --text: #1e293b;
            --text-light: #5a6b7f;
            --text-lighter: #94a3b8;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(26, 42, 74, 0.08);
            --shadow-lg: 0 12px 48px rgba(26, 42, 74, 0.14);
            --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: var(--font-sans);
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            font-size: 1rem;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
            transition: var(--transition);
        }
        ul {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航 ===== */
        .nav-float {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 48px);
            max-width: 1200px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-radius: 60px;
            padding: 10px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.3);
            z-index: 1000;
            transition: var(--transition);
        }
        .nav-float.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 4px 30px rgba(26, 42, 74, 0.12);
        }
        .nav-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.3px;
        }
        .nav-logo i {
            color: var(--gold);
            font-size: 1.3rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links li a {
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links li a:hover {
            background: var(--primary-lighter);
            color: var(--primary);
        }
        .nav-links li a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(26, 42, 74, 0.2);
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--primary);
            padding: 6px 10px;
            border-radius: 8px;
        }
        .nav-toggle:hover {
            background: var(--primary-lighter);
        }

        @media (max-width: 768px) {
            .nav-float {
                top: 12px;
                padding: 10px 18px;
                border-radius: 40px;
                width: calc(100% - 24px);
            }
            .nav-links {
                position: fixed;
                top: 80px;
                left: 12px;
                right: 12px;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                border-radius: 24px;
                flex-direction: column;
                padding: 18px 12px;
                gap: 6px;
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
                border: 1px solid var(--border);
                display: none;
                z-index: 999;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li a {
                padding: 12px 20px;
                width: 100%;
                text-align: center;
                font-size: 1.05rem;
            }
            .nav-toggle {
                display: block;
            }
        }

        @media (max-width: 480px) {
            .nav-float {
                padding: 8px 14px;
                top: 10px;
            }
            .nav-logo {
                font-size: 1.15rem;
            }
            .nav-logo i {
                font-size: 1.1rem;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(26, 42, 74, 0.88) 0%, rgba(26, 42, 74, 0.70) 100%), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 140px 24px 80px;
            text-align: center;
            color: #fff;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg), transparent);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(212, 168, 75, 0.25);
            border: 1px solid rgba(212, 168, 75, 0.35);
            color: var(--gold-light);
            padding: 6px 22px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            letter-spacing: 0.3px;
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero-title {
            font-size: clamp(2.6rem, 6.5vw, 4.4rem);
            font-weight: 800;
            line-height: 1.12;
            letter-spacing: -1px;
            margin-bottom: 20px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }
        .hero-title span {
            color: var(--gold);
        }
        .hero-sub {
            font-size: clamp(1.05rem, 2vw, 1.35rem);
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.7;
            font-weight: 400;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--gold);
            color: var(--primary);
            padding: 16px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 8px 28px rgba(212, 168, 75, 0.35);
            transition: var(--transition);
            border: none;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(212, 168, 75, 0.45);
            background: var(--gold-light);
            color: var(--primary);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: #fff;
            padding: 16px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            border: 2px solid rgba(255, 255, 255, 0.35);
            transition: var(--transition);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.7);
            transform: translateY(-3px);
        }
        .btn-outline-light:active {
            transform: translateY(0);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            margin-top: 52px;
            padding-top: 36px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--gold);
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        @media (max-width: 640px) {
            .hero-section {
                min-height: 80vh;
                padding: 120px 18px 60px;
            }
            .hero-stats {
                gap: 24px;
                margin-top: 36px;
                padding-top: 24px;
            }
            .hero-stat-item .num {
                font-size: 1.7rem;
            }
            .btn-primary,
            .btn-outline-light {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }

        /* ===== 通用板块 ===== */
        .section-padding {
            padding: 90px 0;
        }
        .section-padding-sm {
            padding: 60px 0;
        }
        .section-title {
            font-size: clamp(2rem, 4vw, 2.8rem);
            font-weight: 800;
            color: var(--primary);
            text-align: center;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            text-align: center;
            max-width: 680px;
            margin: 0 auto 52px;
            line-height: 1.7;
        }
        .section-subtitle strong {
            color: var(--primary);
        }

        .bg-white {
            background: #fff;
        }
        .bg-warm {
            background: var(--bg-warm);
        }
        .bg-alt {
            background: var(--bg);
        }
        .bg-dark {
            background: var(--primary);
            color: #fff;
        }
        .bg-dark .section-title {
            color: #fff;
        }
        .bg-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.8);
        }

        /* ===== 卡片 ===== */
        .card-base {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            overflow: hidden;
        }
        .card-base:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 28px;
        }
        .service-card {
            padding: 0;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            overflow: hidden;
        }
        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .service-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .service-card .card-body {
            padding: 28px 24px 30px;
        }
        .service-card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-lighter);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
        }
        .service-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .service-card p {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== 场景 ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
        }
        .scene-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 36px 24px 32px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .scene-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--gold-light);
        }
        .scene-card .icon {
            font-size: 2.4rem;
            color: var(--gold);
            margin-bottom: 16px;
        }
        .scene-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .scene-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== 流程 ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            counter-reset: step;
        }
        .process-step {
            background: #fff;
            border-radius: var(--radius);
            padding: 32px 22px 28px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .process-step .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            margin: 0 auto 16px;
            box-shadow: 0 4px 12px rgba(26, 42, 74, 0.2);
        }
        .process-step h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== 案例 ===== */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .case-card {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            background: #fff;
        }
        .case-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .case-card img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-radius: 0;
        }
        .case-card .case-info {
            padding: 22px 24px 26px;
        }
        .case-card .case-tag {
            display: inline-block;
            background: var(--primary-lighter);
            color: var(--primary);
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .case-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .case-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== 数据/优势 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 28px;
            text-align: center;
        }
        .stat-item .stat-num {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--gold);
            line-height: 1.1;
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.8);
            margin-top: 6px;
        }
        .bg-dark .stat-item .stat-label {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--gold-light);
        }
        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            gap: 16px;
            background: none;
            width: 100%;
            text-align: left;
            border: none;
            font-family: inherit;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--gold-dark);
        }
        .faq-question i {
            font-size: 0.9rem;
            color: var(--gold);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            padding: 80px 24px;
            text-align: center;
            color: #fff;
            border-radius: 0;
        }
        .cta-section h2 {
            font-size: clamp(2rem, 4vw, 2.8rem);
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn-primary {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
        }
        .cta-section .btn-primary:hover {
            background: var(--gold-light);
            color: var(--primary);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-top: 14px;
            max-width: 360px;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--gold);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0 28px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 600px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
        }

        /* ===== 工具 ===== */
        .gap-4 {
            gap: 16px;
        }
        .mt-2 {
            margin-top: 8px;
        }
        .mt-4 {
            margin-top: 16px;
        }
        .mt-6 {
            margin-top: 24px;
        }
        .mt-8 {
            margin-top: 32px;
        }
        .mt-10 {
            margin-top: 40px;
        }
        .mb-2 {
            margin-bottom: 8px;
        }
        .mb-4 {
            margin-bottom: 16px;
        }
        .mb-6 {
            margin-bottom: 24px;
        }
        .text-center {
            text-align: center;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .gap-3 {
            gap: 12px;
        }
        .gap-6 {
            gap: 24px;
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 60px 0;
            }
            .section-padding-sm {
                padding: 40px 0;
            }
            .section-subtitle {
                margin-bottom: 36px;
                font-size: 1rem;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .scene-grid {
                grid-template-columns: 1fr 1fr;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 480px) {
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item .stat-num {
                font-size: 2rem;
            }
            .hero-title {
                font-size: 2rem;
            }
            .container {
                padding: 0 16px;
            }
            .cta-section {
                padding: 56px 16px;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
        }

        /* ===== 图片占位优雅降级 ===== */
        .img-placeholder {
            background: var(--primary-lighter);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-lighter);
            font-size: 0.9rem;
        }

        /* 滚动加载动画 */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }