/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #e11d48;
            --color-primary-dark: #be123c;
            --color-primary-light: #fda4af;
            --color-secondary: #1e293b;
            --color-secondary-light: #334155;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-bg: #f8fafc;
            --color-bg-dark: #0f172a;
            --color-bg-card: #ffffff;
            --color-bg-section: #f1f5f9;
            --color-text: #0f172a;
            --color-text-secondary: #475569;
            --color-text-light: #94a3b8;
            --color-text-inverse: #ffffff;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --radius-sm: 0.375rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
            --spacing-section: 5rem;
            --spacing-block: 3rem;
            --max-width: 1200px;
            --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-family);
            color: var(--color-text);
            background-color: var(--color-bg);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
        a:hover { color: var(--color-primary); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea, select { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }
        h1 { font-size: 2.75rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.375rem; }
        h4 { font-size: 1.125rem; }

        /* ===== 容器 ===== */
        .container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
        .container-narrow { max-width: 880px; }
        .container-wide { max-width: 1400px; }

        /* ===== 板块间距 ===== */
        .section { padding: var(--spacing-section) 0; }
        .section + .section { padding-top: 0; }
        .section-title { text-align: center; margin-bottom: var(--spacing-block); }
        .section-title h2 { font-size: 2.25rem; font-weight: 800; letter-spacing: -0.02em; color: var(--color-text); }
        .section-title p { font-size: 1.125rem; color: var(--color-text-secondary); margin-top: 0.75rem; max-width: 640px; margin-left: auto; margin-right: auto; }
        .section-title .title-accent { display: inline-block; width: 48px; height: 4px; border-radius: 2px; background: var(--color-primary); margin-bottom: 1rem; }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(255,255,255,0.96); backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: 68px; max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem;
        }
        .logo {
            font-size: 1.4rem; font-weight: 800; letter-spacing: -0.02em;
            color: var(--color-text); display: flex; align-items: center; gap: 0.5rem;
        }
        .logo .logo-icon {
            width: 34px; height: 34px; background: var(--color-primary);
            border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
            color: #fff; font-size: 1.1rem; font-weight: 700;
        }
        .logo span { color: var(--color-primary); }
        .nav-list { display: flex; align-items: center; gap: 0.25rem; }
        .nav-list a {
            display: block; padding: 0.5rem 1rem; border-radius: var(--radius-md);
            font-size: 0.925rem; font-weight: 500; color: var(--color-text-secondary);
            transition: all 0.2s ease; position: relative;
        }
        .nav-list a:hover { color: var(--color-primary); background: rgba(225,29,72,0.06); }
        .nav-list a.active { color: var(--color-primary); font-weight: 600; background: rgba(225,29,72,0.08); }
        .nav-list a.active::after {
            content: ''; position: absolute; bottom: 2px; left: 1rem; right: 1rem;
            height: 3px; background: var(--color-primary); border-radius: 2px;
        }
        .nav-cta {
            display: inline-flex; align-items: center; gap: 0.5rem;
            padding: 0.5rem 1.5rem; background: var(--color-primary); color: #fff !important;
            border-radius: var(--radius-md); font-weight: 600; font-size: 0.9rem;
            transition: all 0.25s ease; margin-left: 1rem;
        }
        .nav-cta:hover { background: var(--color-primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
        .nav-cta i { font-size: 0.85rem; }
        .nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 0.5rem; cursor: pointer; background: none; border: none; }
        .nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text); border-radius: 2px; transition: all 0.3s ease; }
        .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .nav-toggle.active span:nth-child(2) { opacity: 0; }
        .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh; display: flex; align-items: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            position: relative; overflow: hidden; padding-top: 68px;
        }
        .hero::before {
            content: ''; position: absolute; inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(225,29,72,0.15) 0%, transparent 60%),
                        radial-gradient(ellipse at 80% 50%, rgba(245,158,11,0.08) 0%, transparent 50%);
            pointer-events: none;
        }
        .hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; position: relative; z-index: 1; }
        .hero-content { padding: 2rem 0; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 0.5rem;
            padding: 0.35rem 1rem; background: rgba(225,29,72,0.15);
            border: 1px solid rgba(225,29,72,0.3); border-radius: 999px;
            font-size: 0.85rem; color: var(--color-primary-light); margin-bottom: 1.5rem;
        }
        .hero-badge i { font-size: 0.75rem; }
        .hero h1 {
            font-size: 3.25rem; font-weight: 900; line-height: 1.15;
            color: var(--color-text-inverse); letter-spacing: -0.03em;
        }
        .hero h1 .highlight { color: var(--color-primary); }
        .hero p {
            font-size: 1.15rem; color: rgba(255,255,255,0.7); margin-top: 1.25rem;
            max-width: 520px; line-height: 1.8;
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.25rem; }
        .hero-actions .btn-primary {
            display: inline-flex; align-items: center; gap: 0.5rem;
            padding: 0.85rem 2rem; background: var(--color-primary); color: #fff;
            border-radius: var(--radius-md); font-weight: 600; font-size: 1rem;
            transition: all 0.25s ease; border: none;
        }
        .hero-actions .btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(225,29,72,0.35); }
        .hero-actions .btn-outline {
            display: inline-flex; align-items: center; gap: 0.5rem;
            padding: 0.85rem 2rem; border: 2px solid rgba(255,255,255,0.25);
            border-radius: var(--radius-md); color: #fff; font-weight: 600; font-size: 1rem;
            transition: all 0.25s ease;
        }
        .hero-actions .btn-outline:hover { border-color: var(--color-primary); background: rgba(225,29,72,0.1); transform: translateY(-2px); }
        .hero-stats {
            display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 2.5rem;
        }
        .hero-stat-item { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-md); padding: 1rem 1.25rem; }
        .hero-stat-item .number { font-size: 1.75rem; font-weight: 800; color: var(--color-accent); line-height: 1.2; }
        .hero-stat-item .label { font-size: 0.8rem; color: rgba(255,255,255,0.5); margin-top: 0.2rem; }
        .hero-visual {
            display: flex; align-items: center; justify-content: center;
            position: relative; min-height: 400px;
        }
        .hero-visual .card-decor {
            width: 100%; max-width: 480px; aspect-ratio: 4/3;
            background: linear-gradient(145deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
            border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-xl);
            padding: 2rem; backdrop-filter: blur(4px);
            display: flex; flex-direction: column; justify-content: center;
        }
        .hero-visual .card-decor .mini-chart { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem; margin-bottom: 1.5rem; }
        .hero-visual .card-decor .mini-chart .bar { height: 80px; border-radius: var(--radius-sm); background: linear-gradient(to top, var(--color-primary), rgba(225,29,72,0.3)); align-self: flex-end; }
        .hero-visual .card-decor .mini-chart .bar:nth-child(1) { height: 40px; background: linear-gradient(to top, var(--color-accent), rgba(245,158,11,0.3)); }
        .hero-visual .card-decor .mini-chart .bar:nth-child(2) { height: 70px; }
        .hero-visual .card-decor .mini-chart .bar:nth-child(3) { height: 55px; background: linear-gradient(to top, var(--color-accent), rgba(245,158,11,0.3)); }
        .hero-visual .card-decor .mini-chart .bar:nth-child(4) { height: 85px; }
        .hero-visual .card-decor .mini-data { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
        .hero-visual .card-decor .mini-data .item { background: rgba(255,255,255,0.05); border-radius: var(--radius-sm); padding: 0.75rem 1rem; }
        .hero-visual .card-decor .mini-data .item .val { font-size: 1.25rem; font-weight: 700; color: #fff; }
        .hero-visual .card-decor .mini-data .item .lbl { font-size: 0.75rem; color: rgba(255,255,255,0.5); }

        /* ===== 数据板块 ===== */
        .data-section { background: var(--color-bg-dark); color: var(--color-text-inverse); }
        .data-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
        .data-card {
            text-align: center; padding: 2rem 1.5rem;
            background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06);
            border-radius: var(--radius-lg); transition: all 0.3s ease;
        }
        .data-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); border-color: rgba(225,29,72,0.3); }
        .data-card .icon { font-size: 2rem; color: var(--color-primary); margin-bottom: 0.75rem; }
        .data-card .number { font-size: 2.5rem; font-weight: 900; color: var(--color-accent); line-height: 1.2; }
        .data-card .number .suffix { font-size: 1.25rem; color: rgba(245,158,11,0.7); }
        .data-card .label { font-size: 0.95rem; color: rgba(255,255,255,0.6); margin-top: 0.5rem; }

        /* ===== 分类入口 ===== */
        .category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
        .category-card {
            background: var(--color-bg-card); border: 1px solid var(--color-border);
            border-radius: var(--radius-lg); padding: 2rem 1.75rem; text-align: center;
            transition: all 0.3s ease; position: relative; overflow: hidden;
        }
        .category-card::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
            background: var(--color-primary); transform: scaleX(0); transform-origin: left;
            transition: transform 0.3s ease;
        }
        .category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .category-card:hover::before { transform: scaleX(1); }
        .category-card .icon { font-size: 2.25rem; color: var(--color-primary); margin-bottom: 1rem; }
        .category-card h3 { font-size: 1.2rem; font-weight: 700; color: var(--color-text); }
        .category-card p { font-size: 0.9rem; color: var(--color-text-secondary); margin-top: 0.5rem; line-height: 1.6; }
        .category-card .tag {
            display: inline-block; margin-top: 1rem; padding: 0.3rem 0.9rem;
            background: rgba(225,29,72,0.08); color: var(--color-primary);
            border-radius: 999px; font-size: 0.8rem; font-weight: 500;
        }

        /* ===== 资讯列表 ===== */
        .news-section { background: var(--color-bg-section); }
        .news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
        .news-card {
            background: var(--color-bg-card); border-radius: var(--radius-md);
            border: 1px solid var(--color-border); overflow: hidden;
            transition: all 0.3s ease; display: flex; flex-direction: column;
        }
        .news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .news-card .card-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
        .news-card .card-meta { display: flex; align-items: center; gap: 0.75rem; font-size: 0.8rem; color: var(--color-text-light); margin-bottom: 0.6rem; }
        .news-card .card-meta .cat { display: inline-block; padding: 0.15rem 0.6rem; background: rgba(225,29,72,0.08); color: var(--color-primary); border-radius: 999px; font-weight: 500; }
        .news-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--color-text); line-height: 1.4; margin-bottom: 0.5rem; }
        .news-card h3 a { color: inherit; }
        .news-card h3 a:hover { color: var(--color-primary); }
        .news-card p { font-size: 0.9rem; color: var(--color-text-secondary); line-height: 1.6; flex: 1; }
        .news-card .card-footer { margin-top: 1rem; display: flex; align-items: center; justify-content: space-between; font-size: 0.8rem; color: var(--color-text-light); border-top: 1px solid var(--color-border-light); padding-top: 0.75rem; }
        .news-card .card-footer a { color: var(--color-primary); font-weight: 500; }
        .news-empty { grid-column: 1 / -1; text-align: center; padding: 3rem 1rem; color: var(--color-text-light); background: var(--color-bg-card); border-radius: var(--radius-md); border: 1px dashed var(--color-border); }

        /* ===== 特色优势 ===== */
        .features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
        .feature-item { text-align: center; padding: 1.5rem 1rem; }
        .feature-item .icon-wrap {
            width: 64px; height: 64px; margin: 0 auto 1rem;
            background: rgba(225,29,72,0.08); border-radius: var(--radius-md);
            display: flex; align-items: center; justify-content: center;
            font-size: 1.6rem; color: var(--color-primary); transition: all 0.3s ease;
        }
        .feature-item:hover .icon-wrap { background: var(--color-primary); color: #fff; transform: scale(1.05); }
        .feature-item h3 { font-size: 1.1rem; font-weight: 700; color: var(--color-text); }
        .feature-item p { font-size: 0.9rem; color: var(--color-text-secondary); margin-top: 0.4rem; line-height: 1.6; }

        /* ===== 流程步骤 ===== */
        .steps-section { background: var(--color-bg-dark); color: var(--color-text-inverse); }
        .steps-section .section-title h2 { color: #fff; }
        .steps-section .section-title p { color: rgba(255,255,255,0.6); }
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; position: relative; }
        .steps-grid::before {
            content: ''; position: absolute; top: 3rem; left: 12.5%; right: 12.5%;
            height: 2px; background: linear-gradient(to right, var(--color-primary), rgba(225,29,72,0.2));
            z-index: 0;
        }
        .step-item { text-align: center; position: relative; z-index: 1; }
        .step-item .step-num {
            width: 56px; height: 56px; margin: 0 auto 1rem;
            background: var(--color-primary); border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.4rem; font-weight: 800; color: #fff;
            border: 3px solid var(--color-bg-dark); box-shadow: 0 0 0 3px var(--color-primary);
        }
        .step-item h3 { font-size: 1.1rem; font-weight: 700; color: #fff; }
        .step-item p { font-size: 0.9rem; color: rgba(255,255,255,0.55); margin-top: 0.4rem; line-height: 1.6; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.75rem; }
        .faq-item { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; transition: all 0.2s ease; }
        .faq-item:hover { border-color: var(--color-border); }
        .faq-item .faq-q {
            display: flex; align-items: center; justify-content: space-between;
            padding: 1.25rem 1.5rem; cursor: pointer; font-weight: 600; font-size: 1rem;
            color: var(--color-text); user-select: none; gap: 1rem;
        }
        .faq-item .faq-q i { color: var(--color-primary); transition: transform 0.3s ease; font-size: 0.9rem; flex-shrink: 0; }
        .faq-item.active .faq-q i { transform: rotate(180deg); }
        .faq-item .faq-a {
            max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 1.5rem; color: var(--color-text-secondary); font-size: 0.95rem; line-height: 1.7;
        }
        .faq-item.active .faq-a { max-height: 300px; padding: 0 1.5rem 1.25rem; }

        /* ===== CTA ===== */
        .cta-section { background: linear-gradient(135deg, var(--color-primary) 0%, #be123c 100%); color: #fff; text-align: center; padding: 4rem 0; }
        .cta-section h2 { font-size: 2.25rem; font-weight: 800; color: #fff; }
        .cta-section p { font-size: 1.1rem; opacity: 0.9; margin-top: 0.75rem; max-width: 560px; margin-left: auto; margin-right: auto; }
        .cta-section .btn-cta {
            display: inline-flex; align-items: center; gap: 0.5rem;
            margin-top: 2rem; padding: 1rem 2.5rem; background: #fff; color: var(--color-primary);
            border-radius: var(--radius-md); font-weight: 700; font-size: 1.05rem;
            transition: all 0.25s ease; border: none;
        }
        .cta-section .btn-cta:hover { background: var(--color-bg); transform: translateY(-3px); box-shadow: 0 12px 30px rgba(0,0,0,0.2); }
        .cta-section .btn-outline-light {
            display: inline-flex; align-items: center; gap: 0.5rem;
            margin-top: 2rem; margin-left: 1rem; padding: 1rem 2.5rem;
            border: 2px solid rgba(255,255,255,0.5); border-radius: var(--radius-md); color: #fff;
            font-weight: 600; font-size: 1.05rem; transition: all 0.25s ease;
        }
        .cta-section .btn-outline-light:hover { border-color: #fff; background: rgba(255,255,255,0.1); transform: translateY(-3px); }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-secondary); color: rgba(255,255,255,0.7);
            padding: 3rem 0 2rem; border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; }
        .footer-brand .logo { color: #fff; margin-bottom: 0.75rem; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer-col h4 { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 1rem; }
        .footer-col ul li { margin-bottom: 0.5rem; }
        .footer-col ul li a { font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: all 0.2s ease; }
        .footer-col ul li a:hover { color: var(--color-primary); padding-left: 4px; }
        .footer-bottom {
            margin-top: 2.5rem; padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.06);
            display: flex; align-items: center; justify-content: space-between;
            font-size: 0.85rem; color: rgba(255,255,255,0.4); flex-wrap: wrap; gap: 0.5rem;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--color-primary); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
            .hero-visual { min-height: 300px; }
            .hero h1 { font-size: 2.75rem; }
            .data-grid { grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
            .features-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
            .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 2rem; }
            .steps-grid::before { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
            .category-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
            .news-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            :root { --spacing-section: 3rem; }
            .nav-list { display: none; }
            .nav-list.open { display: flex; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); border-bottom: 1px solid var(--color-border); padding: 1rem; box-shadow: var(--shadow-lg); gap: 0.25rem; }
            .nav-list.open a { padding: 0.75rem 1rem; }
            .nav-list.open .nav-cta { margin-left: 0; margin-top: 0.5rem; justify-content: center; }
            .nav-toggle { display: flex; }
            .hero { min-height: auto; padding: 6rem 0 3rem; }
            .hero h1 { font-size: 2.25rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
            .hero-visual { min-height: 200px; }
            .hero-visual .card-decor { padding: 1.25rem; }
            .data-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
            .data-card .number { font-size: 2rem; }
            .category-grid { grid-template-columns: 1fr; gap: 1rem; }
            .features-grid { grid-template-columns: 1fr; gap: 1.5rem; }
            .steps-grid { grid-template-columns: 1fr; gap: 1.5rem; }
            .section-title h2 { font-size: 1.75rem; }
            .cta-section h2 { font-size: 1.75rem; }
            .cta-section .btn-cta, .cta-section .btn-outline-light { margin-left: 0; width: 100%; justify-content: center; }
            .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .news-card .card-body { padding: 1.25rem; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.85rem; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn-primary, .hero-actions .btn-outline { width: 100%; justify-content: center; }
            .data-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
            .data-card { padding: 1.25rem 1rem; }
            .data-card .number { font-size: 1.6rem; }
            .container { padding: 0 1rem; }
            .header-inner { padding: 0 1rem; }
        }

        /* ===== 辅助 ===== */
        .text-primary { color: var(--color-primary); }
        .bg-primary { background-color: var(--color-primary); }
        .text-accent { color: var(--color-accent); }
        .gap-section { height: 1px; background: var(--color-border); margin: 0; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0; }

        /* ===== 按钮通用补充 ===== */
        .btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.7rem 1.5rem; border-radius: var(--radius-md); font-weight: 600; font-size: 0.95rem; transition: all 0.25s ease; border: none; cursor: pointer; }
        .btn-primary { background: var(--color-primary); color: #fff; }
        .btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-outline { border: 2px solid var(--color-primary); color: var(--color-primary); background: transparent; }
        .btn-outline:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); }
        .btn-sm { padding: 0.45rem 1rem; font-size: 0.85rem; }
        .btn-lg { padding: 1rem 2.25rem; font-size: 1.05rem; }

        /* focus 可访问性 */
        a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-sm); }

/* roulang page: category1 */
:root {
            --brand: #1a68e0;
            --brand-dark: #122753;
            --accent: #ff7411;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --text-dark: #0f172a;
            --text-muted: #64748b;
            --border-light: #e2e8f0;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.1);
            --radius-card: 1rem;
            --radius-btn: 0.75rem;
        }

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

        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* -------- Header / Nav -------- */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.3s;
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--brand-dark);
            text-decoration: none;
            letter-spacing: -0.02em;
            transition: opacity 0.2s;
        }
        .logo:hover {
            opacity: 0.85;
        }
        .logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--brand), #3b82f6);
            border-radius: 0.65rem;
            color: #fff;
            font-size: 1rem;
        }
        .logo span {
            color: var(--brand);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-list a {
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-btn);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            text-decoration: none;
            transition: all 0.25s;
            white-space: nowrap;
        }
        .nav-list a:hover {
            color: var(--brand-dark);
            background: rgba(26, 104, 224, 0.06);
        }
        .nav-list a.active {
            color: var(--brand);
            background: rgba(26, 104, 224, 0.1);
            font-weight: 600;
        }
        .nav-list a.nav-cta {
            background: linear-gradient(135deg, var(--accent), #ff5500);
            color: #fff;
            font-weight: 600;
            padding: 0.5rem 1.5rem;
            border-radius: 2rem;
            box-shadow: 0 4px 14px rgba(255, 116, 17, 0.3);
            margin-left: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .nav-list a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(255, 116, 17, 0.4);
            background: linear-gradient(135deg, #ff8822, #ff4400);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 0.5rem;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(0, 0, 0, 0.04);
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-dark);
            border-radius: 4px;
            transition: all 0.25s;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* -------- Hero / Page Header -------- */
        .page-hero {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a6b 50%, #122753 100%);
            padding: 4rem 0 3.5rem;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .page-hero h1 {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
        }
        .page-hero h1 i {
            color: var(--accent);
        }
        .page-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            line-height: 1.7;
        }
        .page-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem 2.5rem;
            margin-top: 1.75rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }
        .page-hero .hero-meta span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
        }
        .page-hero .hero-meta i {
            color: var(--accent);
            font-size: 1.1rem;
        }

        /* -------- Section Common -------- */
        .section {
            padding: 4.5rem 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(26, 104, 224, 0.08);
            color: var(--brand);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.3rem 1rem;
            border-radius: 2rem;
            letter-spacing: 0.02em;
            margin-bottom: 0.75rem;
            text-transform: uppercase;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 0.75rem;
            color: var(--text-dark);
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.7;
        }
        .section-header {
            margin-bottom: 2.75rem;
        }

        /* -------- Cards -------- */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.75rem;
        }
        .card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all 0.3s;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(26, 104, 224, 0.15);
        }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            background: #eef2f7;
        }
        .card-body {
            padding: 1.5rem;
        }
        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
            line-height: 1.3;
        }
        .card-body h3 a {
            color: var(--text-dark);
            text-decoration: none;
            transition: color 0.2s;
        }
        .card-body h3 a:hover {
            color: var(--brand);
        }
        .card-body p {
            color: var(--text-muted);
            font-size: 0.93rem;
            line-height: 1.6;
        }
        .card-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.75rem;
            margin-top: 0.75rem;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .card-meta .tag {
            background: rgba(26, 104, 224, 0.08);
            color: var(--brand);
            padding: 0.2rem 0.7rem;
            border-radius: 2rem;
            font-weight: 500;
            font-size: 0.75rem;
        }
        .card-meta .tag-accent {
            background: rgba(255, 116, 17, 0.1);
            color: var(--accent);
        }

        /* -------- Stat / Data Blocks -------- */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1.5rem;
        }
        .stat-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 2rem 1.5rem;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s;
        }
        .stat-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .stat-card .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--brand);
            line-height: 1.1;
            letter-spacing: -0.02em;
        }
        .stat-card .stat-number.accent {
            color: var(--accent);
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.4rem;
        }

        /* -------- Timeline / Schedule -------- */
        .timeline-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .timeline-item {
            display: flex;
            align-items: center;
            gap: 1.25rem;
            background: var(--bg-white);
            padding: 1.25rem 1.5rem;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all 0.25s;
        }
        .timeline-item:hover {
            border-color: rgba(26, 104, 224, 0.2);
            box-shadow: var(--shadow-md);
        }
        .timeline-item .tl-time {
            min-width: 72px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--brand);
        }
        .timeline-item .tl-info {
            flex: 1;
        }
        .timeline-item .tl-info h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.2rem;
        }
        .timeline-item .tl-info p {
            font-size: 0.88rem;
            color: var(--text-muted);
        }
        .timeline-item .tl-badge {
            background: rgba(255, 116, 17, 0.1);
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 1rem;
            border-radius: 2rem;
            white-space: nowrap;
        }

        /* -------- Expert Section -------- */
        .expert-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.75rem;
        }
        .expert-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 1.75rem;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s;
        }
        .expert-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .expert-card .expert-header {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1rem;
        }
        .expert-card .expert-avatar {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .expert-card .expert-name {
            font-weight: 700;
            font-size: 1.05rem;
        }
        .expert-card .expert-title {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .expert-card .expert-quote {
            font-size: 0.95rem;
            color: var(--text-dark);
            line-height: 1.7;
            font-style: italic;
            padding-left: 0.75rem;
            border-left: 3px solid var(--brand);
        }

        /* -------- FAQ -------- */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow 0.25s;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 1.25rem 1.5rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            text-align: left;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            transition: background 0.2s;
        }
        .faq-question:hover {
            background: rgba(26, 104, 224, 0.02);
        }
        .faq-question i {
            color: var(--brand);
            transition: transform 0.3s;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 1.5rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 240px;
            padding: 0 1.5rem 1.25rem;
        }

        /* -------- CTA -------- */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a6b 50%, #122753 100%);
            padding: 4rem 0;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            font-size: 2.25rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin: 0 auto 1.75rem;
        }
        .cta-section .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--accent), #ff5500);
            color: #fff;
            font-weight: 600;
            padding: 0.85rem 2.25rem;
            border-radius: 2rem;
            text-decoration: none;
            box-shadow: 0 4px 18px rgba(255, 116, 17, 0.35);
            transition: all 0.3s;
            border: none;
            cursor: pointer;
            font-size: 1rem;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(255, 116, 17, 0.45);
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: transparent;
            color: #fff;
            font-weight: 600;
            padding: 0.85rem 2.25rem;
            border-radius: 2rem;
            text-decoration: none;
            border: 2px solid rgba(255, 255, 255, 0.3);
            transition: all 0.3s;
            font-size: 1rem;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-2px);
        }

        /* -------- Footer -------- */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 4rem 0 0;
        }
        .site-footer .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 0.75rem;
            display: inline-flex;
        }
        .footer-brand .logo span {
            color: #60a5fa;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.2s;
        }
        .footer-col ul li a:hover {
            color: #60a5fa;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
            transition: color 0.2s;
        }
        .footer-bottom a:hover {
            color: #60a5fa;
        }

        /* -------- Responsive -------- */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .page-hero h1 {
                font-size: 2.25rem;
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 1rem 1.5rem 1.5rem;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-lg);
                gap: 0.25rem;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                width: 100%;
                padding: 0.7rem 1rem;
                border-radius: 0.5rem;
            }
            .nav-list a.nav-cta {
                margin-left: 0;
                margin-top: 0.5rem;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }
            .page-hero {
                padding: 3rem 0 2.5rem;
            }
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .page-hero .hero-meta {
                gap: 1rem 1.5rem;
            }
            .section {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .expert-grid {
                grid-template-columns: 1fr;
            }
            .timeline-item {
                flex-wrap: wrap;
                gap: 0.75rem;
            }
            .timeline-item .tl-time {
                min-width: auto;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 0.5rem;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0 1rem;
            }
            .logo {
                font-size: 1.25rem;
            }
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.75rem;
            }
            .stat-card {
                padding: 1.25rem 0.75rem;
            }
            .stat-card .stat-number {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .container {
                padding: 0 1rem;
            }
            .card-body {
                padding: 1.25rem;
            }
            .faq-question {
                padding: 1rem 1.25rem;
                font-size: 0.95rem;
            }
            .btn-primary,
            .btn-outline-light {
                padding: 0.7rem 1.5rem;
                font-size: 0.9rem;
            }
        }

        /* -------- Utilities -------- */
        .text-brand {
            color: var(--brand);
        }
        .text-accent {
            color: var(--accent);
        }
        .bg-brand-soft {
            background: rgba(26, 104, 224, 0.05);
        }
        .gap-section {
            gap: 1.5rem;
        }
        .mt-section {
            margin-top: 1.5rem;
        }

/* roulang page: article */
:root {
    --primary: #e63946;
    --primary-dark: #cf2f3b;
    --accent: #1d3557;
    --accent-light: #3d6b9e;
    --neutral: #f1faee;
    --dark: #0b0e14;
    --text: #1a1a2e;
    --text-weak: #6b7280;
    --bg-body: #fafbfc;
    --bg-card: #ffffff;
    --border: #e5e7eb;
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.10);
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif; background: var(--bg-body); color: var(--text); line-height: 1.7; font-size: 1rem; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; font-size: inherit; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 1.25rem; }
.section-padding { padding: 4.5rem 0; }
.section-title { font-size: 2rem; font-weight: 700; margin-bottom: 0.5rem; letter-spacing: -0.01em; color: var(--accent); }
.section-subtitle { font-size: 1.05rem; color: var(--text-weak); margin-bottom: 2.5rem; max-width: 640px; }
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.7rem 1.6rem; font-weight: 600; font-size: 0.95rem; border-radius: var(--radius-sm); transition: all var(--transition); border: 2px solid transparent; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 14px rgba(230,57,70,0.35); }
.btn-outline { background: transparent; color: var(--accent); border-color: var(--accent); }
.btn-outline:hover { background: var(--accent); color: #fff; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--text-weak); border-color: transparent; }
.btn-ghost:hover { background: rgba(0,0,0,0.04); color: var(--text); }
.btn-sm { padding: 0.45rem 1rem; font-size: 0.85rem; }
.badge { display: inline-block; padding: 0.2rem 0.7rem; font-size: 0.8rem; font-weight: 600; border-radius: 999px; background: var(--primary); color: #fff; }
.badge-accent { background: var(--accent); color: #fff; }
.badge-soft { background: rgba(230,57,70,0.10); color: var(--primary); }
.badge-soft-accent { background: rgba(29,53,87,0.10); color: var(--accent); }
.card { background: var(--bg-card); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: all var(--transition); overflow: hidden; }
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); border-color: transparent; }
.card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.card-body { padding: 1.25rem; }
.card-title { font-size: 1.1rem; font-weight: 700; line-height: 1.4; margin-bottom: 0.4rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-text { font-size: 0.92rem; color: var(--text-weak); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.tag { display: inline-block; padding: 0.15rem 0.6rem; font-size: 0.78rem; border-radius: 999px; background: rgba(0,0,0,0.04); color: var(--text-weak); transition: all var(--transition); }
.tag:hover { background: var(--primary); color: #fff; }
.divider { height: 1px; background: var(--border); margin: 1.5rem 0; }
/* ===== Header / Nav ===== */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid rgba(229,231,235,0.5); box-shadow: var(--shadow-sm); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 0.75rem 1.25rem; max-width: 1200px; margin: 0 auto; }
.logo { display: flex; align-items: center; gap: 0.4rem; font-size: 1.5rem; font-weight: 800; color: var(--accent); letter-spacing: -0.02em; }
.logo .logo-icon { color: var(--primary); font-size: 1.3rem; }
.logo span { color: var(--primary); }
.nav-list { display: flex; align-items: center; gap: 1.75rem; }
.nav-list a { font-size: 0.95rem; font-weight: 500; color: var(--text); padding: 0.3rem 0; position: relative; transition: color var(--transition); }
.nav-list a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--primary); transition: width var(--transition); border-radius: 2px; }
.nav-list a:hover { color: var(--primary); }
.nav-list a:hover::after { width: 100%; }
.nav-list a.active { color: var(--primary); }
.nav-list a.active::after { width: 100%; }
.nav-list a.nav-cta { background: var(--primary); color: #fff; padding: 0.5rem 1.25rem; border-radius: var(--radius-sm); font-weight: 600; border: 2px solid var(--primary); transition: all var(--transition); }
.nav-list a.nav-cta::after { display: none; }
.nav-list a.nav-cta:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 14px rgba(230,57,70,0.3); color: #fff; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 4px; background: transparent; cursor: pointer; }
.nav-toggle span { display: block; width: 26px; height: 2px; background: var(--accent); border-radius: 4px; transition: all 0.3s ease; }
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
/* ===== Article Hero ===== */
.article-hero { background: linear-gradient(135deg, var(--accent) 0%, #0d1928 100%); padding: 3.5rem 0 2.5rem; position: relative; overflow: hidden; }
.article-hero::before { content: ''; position: absolute; top: -50%; right: -20%; width: 60%; height: 200%; background: radial-gradient(circle, rgba(230,57,70,0.08) 0%, transparent 70%); pointer-events: none; }
.article-hero .container { position: relative; z-index: 1; }
.article-hero .badge { margin-bottom: 1rem; }
.article-hero h1 { font-size: 2.25rem; font-weight: 800; color: #fff; line-height: 1.3; margin-bottom: 1rem; max-width: 860px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 1rem 2rem; color: rgba(255,255,255,0.7); font-size: 0.9rem; align-items: center; }
.article-meta i { margin-right: 0.35rem; }
/* ===== Article Content ===== */
.article-content { font-size: 1.05rem; line-height: 1.9; color: var(--text); }
.article-content h2 { font-size: 1.6rem; font-weight: 700; margin: 2rem 0 1rem; color: var(--accent); }
.article-content h3 { font-size: 1.25rem; font-weight: 700; margin: 1.5rem 0 0.75rem; }
.article-content p { margin-bottom: 1.25rem; }
.article-content ul, .article-content ol { margin: 0 0 1.25rem 1.5rem; }
.article-content li { margin-bottom: 0.5rem; }
.article-content blockquote { border-left: 4px solid var(--primary); padding: 1rem 1.5rem; margin: 1.5rem 0; background: rgba(230,57,70,0.04); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-style: italic; color: var(--text-weak); }
.article-content img { border-radius: var(--radius-md); margin: 1.5rem 0; box-shadow: var(--shadow-sm); }
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-content a:hover { color: var(--primary-dark); }
.article-content table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.95rem; }
.article-content th, .article-content td { padding: 0.75rem 1rem; border: 1px solid var(--border); text-align: left; }
.article-content th { background: rgba(29,53,87,0.05); font-weight: 600; color: var(--accent); }
.article-content code { background: rgba(0,0,0,0.04); padding: 0.2rem 0.5rem; border-radius: 4px; font-size: 0.9em; }
/* ===== FAQ ===== */
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-md); margin-bottom: 0.75rem; overflow: hidden; transition: all var(--transition); background: var(--bg-card); }
.faq-item:hover { border-color: rgba(230,57,70,0.2); }
.faq-question { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.25rem; font-weight: 600; font-size: 1rem; cursor: pointer; background: transparent; transition: background var(--transition); width: 100%; text-align: left; color: var(--text); }
.faq-question:hover { background: rgba(0,0,0,0.02); }
.faq-question i { transition: transform var(--transition); color: var(--primary); font-size: 0.85rem; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease, padding 0.3s ease; padding: 0 1.25rem; color: var(--text-weak); font-size: 0.95rem; line-height: 1.7; }
.faq-item.active .faq-answer { max-height: 300px; padding: 0 1.25rem 1rem; }
/* ===== CTA ===== */
.cta-section { background: linear-gradient(135deg, var(--accent) 0%, #0d1928 100%); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: radial-gradient(circle at 80% 20%, rgba(230,57,70,0.10) 0%, transparent 50%); pointer-events: none; }
.cta-section .container { position: relative; z-index: 1; }
/* ===== Footer ===== */
.site-footer { background: var(--dark); color: rgba(255,255,255,0.7); padding: 3.5rem 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; margin-bottom: 2.5rem; }
.footer-brand .logo { color: #fff; margin-bottom: 1rem; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 1rem; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 0.5rem; }
.footer-col ul a { font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: color var(--transition); }
.footer-col ul a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 1.25rem 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.5rem; font-size: 0.85rem; }
.footer-bottom a { color: rgba(255,255,255,0.6); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--primary); }
/* ===== Not Found ===== */
.not-found { text-align: center; padding: 4rem 1rem; }
.not-found i { font-size: 3.5rem; color: var(--primary); margin-bottom: 1rem; }
.not-found h2 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.75rem; color: var(--accent); }
.not-found p { color: var(--text-weak); margin-bottom: 1.5rem; }
/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .article-hero h1 { font-size: 1.9rem; }
    .section-padding { padding: 3.5rem 0; }
}
@media (max-width: 768px) {
    .nav-list { display: none; position: absolute; top: 100%; left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); flex-direction: column; gap: 0; padding: 0.5rem 0; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md); }
    .nav-list.open { display: flex; }
    .nav-list a { padding: 0.8rem 1.25rem; width: 100%; border-bottom: 1px solid rgba(0,0,0,0.04); }
    .nav-list a::after { display: none; }
    .nav-list a.nav-cta { margin: 0.5rem 1.25rem; width: auto; text-align: center; }
    .nav-toggle { display: flex; }
    .article-hero h1 { font-size: 1.6rem; }
    .section-title { font-size: 1.6rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .article-meta { gap: 0.75rem 1.25rem; font-size: 0.85rem; }
    .article-content { font-size: 1rem; }
    .container { padding: 0 1rem; }
    .section-padding { padding: 2.5rem 0; }
}
@media (max-width: 520px) {
    .article-hero h1 { font-size: 1.35rem; }
    .section-title { font-size: 1.35rem; }
    .card-body { padding: 1rem; }
    .btn { padding: 0.6rem 1.2rem; font-size: 0.9rem; }
    .header-inner { padding: 0.6rem 1rem; }
}