/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0d1b2a;
            --primary-light: #1b3a5c;
            --primary-dark: #070f18;
            --accent: #f0a500;
            --accent-light: #ffd166;
            --accent-dark: #c98800;
            --accent-rgb: 240, 165, 0;
            --energy: #e94560;
            --energy-light: #f06a7e;
            --bg: #f4f6f9;
            --bg-alt: #ffffff;
            --bg-dark: #0d1b2a;
            --text: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aa0;
            --text-light: #ffffff;
            --border: #e0e0e8;
            --border-light: #f0f0f5;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.08);
            --shadow-accent: 0 4px 20px rgba(var(--accent-rgb), 0.3);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --nav-height: 72px;
        }

        /* ===== 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-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--primary); }
        h1 { font-size: 2.75rem; }
        h2 { font-size: 2.25rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.25rem; }
        p { margin-bottom: 1rem; }
        p:last-child { margin-bottom: 0; }

        /* ===== Container ===== */
        .container { max-width: 1200px; padding: 0 24px; margin: 0 auto; }
        .container-narrow { max-width: 900px; }
        .container-wide { max-width: 1400px; }

        /* ===== Section ===== */
        .section { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 16px; }
        .section-subtitle { text-align: center; color: var(--text-secondary); font-size: 1.125rem; max-width: 680px; margin: 0 auto 56px; }
        .section-bg-alt { background: var(--bg-alt); }
        .section-bg-dark { background: var(--bg-dark); color: var(--text-light); }
        .section-bg-dark .section-title { color: var(--text-light); }
        .section-bg-dark .section-subtitle { color: rgba(255,255,255,0.7); }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        .navbar { padding: 0; width: 100%; }
        .navbar .container { display: flex; align-items: center; gap: 16px; }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary) !important;
            flex-shrink: 0;
        }
        .navbar-brand .brand-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
        }
        .navbar-brand .brand-text { letter-spacing: 0.5px; }
        .navbar-brand:hover .brand-icon { transform: rotate(-8deg) scale(1.05); }

        /* 搜索框 */
        .search-box {
            flex: 1;
            max-width: 480px;
            margin: 0 auto;
            position: relative;
        }
        .search-box .input-group {
            border-radius: 50px;
            overflow: hidden;
            border: 2px solid var(--border);
            background: var(--bg);
            transition: var(--transition);
        }
        .search-box .input-group:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(var(--accent-rgb), 0.15);
            background: #fff;
        }
        .search-box .input-group-text {
            background: transparent;
            border: none;
            color: var(--text-muted);
            padding-left: 16px;
            padding-right: 8px;
        }
        .search-box .form-control {
            background: transparent;
            border: none;
            padding: 10px 8px;
            font-size: 0.925rem;
            color: var(--text);
            box-shadow: none !important;
        }
        .search-box .form-control::placeholder { color: var(--text-muted); }
        .search-box .btn-search {
            background: var(--accent);
            color: var(--primary);
            border: none;
            padding: 8px 20px;
            border-radius: 0 50px 50px 0;
            font-weight: 600;
            font-size: 0.875rem;
            transition: var(--transition);
        }
        .search-box .btn-search:hover { background: var(--accent-dark); color: #fff; }
        .search-box .btn-search:active { transform: scale(0.96); }

        /* 导航链接 */
        .navbar-nav { gap: 4px; }
        .navbar-nav .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-secondary) !important;
            transition: var(--transition);
            position: relative;
        }
        .navbar-nav .nav-link:hover { color: var(--primary) !important; background: rgba(13,27,42,0.04); }
        .navbar-nav .nav-link.active {
            color: var(--primary) !important;
            background: rgba(13,27,42,0.06);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .navbar-toggler {
            border: none;
            padding: 8px;
            color: var(--primary);
            background: transparent;
            font-size: 1.4rem;
        }
        .navbar-toggler:focus { box-shadow: none; }
        .navbar-toggler-icon { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='rgba(13,27,42,0.8)' stroke-width='2.5' stroke-linecap='round' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E"); }

        /* ===== Hero ===== */
        .hero {
            padding: 100px 0 80px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, #1a2a4a 100%);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(var(--accent-rgb), 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(233,69,96,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero .container { position: relative; z-index: 1; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(var(--accent-rgb), 0.15);
            color: var(--accent-light);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(var(--accent-rgb), 0.2);
        }
        .hero h1 {
            font-size: 3.25rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            line-height: 1.15;
        }
        .hero h1 .highlight { color: var(--accent); }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.75);
            max-width: 580px;
            margin-bottom: 32px;
            line-height: 1.6;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-actions .btn {
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero-actions .btn-primary-custom {
            background: var(--accent);
            color: var(--primary);
            border: none;
        }
        .hero-actions .btn-primary-custom:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: var(--shadow-accent); }
        .hero-actions .btn-outline-custom {
            background: transparent;
            color: var(--text-light);
            border: 2px solid rgba(255,255,255,0.25);
        }
        .hero-actions .btn-outline-custom:hover { background: rgba(255,255,255,0.1); border-color: var(--accent); color: var(--accent); }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .hero-stat { text-align: center; }
        .hero-stat .num { font-size: 2rem; font-weight: 800; color: var(--accent); display: block; }
        .hero-stat .label { font-size: 0.85rem; color: rgba(255,255,255,0.55); margin-top: 4px; }

        /* ===== Cards ===== */
        .card-custom {
            background: var(--bg-alt);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 32px 28px;
            transition: var(--transition);
            height: 100%;
        }
        .card-custom:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--accent); }
        .card-custom .icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            color: #fff;
        }
        .card-custom .icon.accent-bg { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); }
        .card-custom .icon.energy-bg { background: linear-gradient(135deg, var(--energy), var(--energy-light)); }
        .card-custom .icon.primary-bg { background: linear-gradient(135deg, var(--primary), var(--primary-light)); }
        .card-custom .icon.teal-bg { background: linear-gradient(135deg, #0a9396, #0b6e70); }
        .card-custom h4 { margin-bottom: 10px; font-size: 1.15rem; }
        .card-custom p { color: var(--text-secondary); font-size: 0.95rem; }

        /* ===== Steps ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
        .step-item {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 36px 28px;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
        .step-item .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary);
            font-size: 1.2rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            counter-increment: step;
        }
        .step-item h4 { font-size: 1.1rem; margin-bottom: 8px; }
        .step-item p { color: var(--text-secondary); font-size: 0.9rem; }
        .step-connector { display: none; }

        /* ===== Feature Blocks ===== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 56px;
        }
        .feature-block:last-child { margin-bottom: 0; }
        .feature-block.reverse { direction: rtl; }
        .feature-block.reverse > * { direction: ltr; }
        .feature-image {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            border-radius: var(--radius-lg);
            padding: 48px;
            min-height: 280px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 4rem;
            position: relative;
            overflow: hidden;
        }
        .feature-image::after {
            content: '';
            position: absolute;
            top: -20%;
            right: -20%;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(var(--accent-rgb), 0.15), transparent);
            border-radius: 50%;
        }
        .feature-content h3 { font-size: 1.6rem; margin-bottom: 12px; }
        .feature-content p { color: var(--text-secondary); font-size: 1rem; }
        .feature-content .feature-list { margin-top: 16px; }
        .feature-content .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 6px 0;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .feature-content .feature-list li i { color: var(--accent); margin-top: 4px; flex-shrink: 0; }

        /* ===== Category Card ===== */
        .category-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 40px 32px;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--accent); }
        .category-card .icon { font-size: 2.8rem; color: var(--accent); margin-bottom: 16px; }
        .category-card h4 { font-size: 1.2rem; margin-bottom: 8px; }
        .category-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 16px; }
        .category-card .btn-category {
            padding: 8px 24px;
            border-radius: 50px;
            background: transparent;
            border: 2px solid var(--accent);
            color: var(--accent-dark);
            font-weight: 600;
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .category-card .btn-category:hover { background: var(--accent); color: var(--primary); }

        /* ===== News / CMS List ===== */
        .news-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        .news-item {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 24px 28px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-item:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--accent); }
        .news-item .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .news-item .news-meta .badge-tag {
            background: rgba(var(--accent-rgb), 0.12);
            color: var(--accent-dark);
            padding: 2px 12px;
            border-radius: 50px;
            font-weight: 600;
        }
        .news-item h4 { font-size: 1.05rem; margin-bottom: 6px; }
        .news-item h4 a { color: var(--primary); }
        .news-item h4 a:hover { color: var(--accent); }
        .news-item p { color: var(--text-secondary); font-size: 0.9rem; flex-grow: 1; }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-muted);
            background: var(--bg-alt);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        .news-empty i { font-size: 2.4rem; margin-bottom: 12px; opacity: 0.5; }

        /* ===== FAQ ===== */
        .faq-accordion .accordion-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--bg-alt);
        }
        .faq-accordion .accordion-button {
            padding: 20px 24px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--primary);
            background: var(--bg-alt);
            box-shadow: none !important;
        }
        .faq-accordion .accordion-button::after {
            background-size: 1rem;
            filter: brightness(0.4);
        }
        .faq-accordion .accordion-button:not(.collapsed) { color: var(--accent-dark); background: var(--bg-alt); }
        .faq-accordion .accordion-button:not(.collapsed)::after { filter: brightness(1) sepia(1) hue-rotate(-10deg); }
        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 72px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -30%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(var(--accent-rgb), 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-block::after {
            content: '';
            position: absolute;
            bottom: -40%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(233,69,96,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-block .container { position: relative; z-index: 1; }
        .cta-block h2 { color: var(--text-light); font-size: 2rem; margin-bottom: 12px; }
        .cta-block p { color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-block .btn-cta {
            padding: 16px 48px;
            border-radius: 50px;
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .cta-block .btn-cta:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: var(--shadow-accent); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 0;
        }
        .site-footer .footer-brand { font-size: 1.2rem; font-weight: 800; color: var(--text-light); margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
        .site-footer .footer-brand i { color: var(--accent); }
        .site-footer p { font-size: 0.9rem; }
        .site-footer .footer-links { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: center; margin-bottom: 16px; }
        .site-footer .footer-links a { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
        .site-footer .footer-links a:hover { color: var(--accent); }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding: 20px 0;
            margin-top: 32px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199px) {
            .search-box { max-width: 380px; }
        }

        @media (max-width: 991px) {
            :root { --nav-height: 64px; }
            .site-header { height: var(--nav-height); }
            .navbar .container { flex-wrap: nowrap; }
            .search-box { display: none; }
            .search-box.mobile-show { display: block; max-width: 100%; margin: 12px 0; }
            .navbar-collapse {
                background: var(--bg-alt);
                padding: 16px 24px;
                border-radius: var(--radius);
                box-shadow: var(--shadow-lg);
                margin-top: 8px;
                border: 1px solid var(--border-light);
            }
            .navbar-nav .nav-link { padding: 10px 16px; }
            .navbar-nav .nav-link.active::after { display: none; }
            .hero { padding: 72px 0 56px; }
            .hero h1 { font-size: 2.25rem; }
            .hero p { font-size: 1.05rem; }
            .hero-stats { grid-template-columns: repeat(3, 1fr); gap: 16px; }
            .hero-stat .num { font-size: 1.6rem; }
            .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .feature-block { grid-template-columns: 1fr; gap: 32px; }
            .feature-block.reverse { direction: ltr; }
            .feature-image { min-height: 200px; padding: 32px; font-size: 3rem; }
            .news-list { grid-template-columns: 1fr; }
            .section { padding: 56px 0; }
            .section-title { font-size: 1.8rem; }
            .section-subtitle { font-size: 1rem; margin-bottom: 40px; }
            .cta-block { padding: 48px 24px; }
            .cta-block h2 { font-size: 1.6rem; }
        }

        @media (max-width: 767px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 0.95rem; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .hero-stats { grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
            .hero-stat .num { font-size: 1.4rem; }
            .hero-stat .label { font-size: 0.75rem; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .step-item { padding: 24px 16px; }
            .card-custom { padding: 24px 20px; }
            .category-card { padding: 28px 20px; }
            .news-item { padding: 20px; }
            .faq-accordion .accordion-button { padding: 16px 18px; font-size: 0.95rem; }
            .cta-block { padding: 36px 20px; }
            .cta-block h2 { font-size: 1.4rem; }
            .cta-block .btn-cta { width: 100%; justify-content: center; }
            .site-footer .footer-links { gap: 6px 16px; }
            .feature-image { min-height: 160px; padding: 24px; font-size: 2.4rem; }
        }

        @media (max-width: 520px) {
            .hero h1 { font-size: 1.5rem; }
            .hero-stats { grid-template-columns: 1fr 1fr; gap: 12px; }
            .hero-stat:nth-child(3) { grid-column: 1 / -1; }
            .steps-grid { grid-template-columns: 1fr; }
            .section-title { font-size: 1.5rem; }
            .section-subtitle { font-size: 0.9rem; }
            .navbar-brand .brand-text { font-size: 1rem; }
            .navbar-brand .brand-icon { width: 34px; height: 34px; font-size: 1rem; }
            .news-item h4 { font-size: 0.95rem; }
        }

        /* ===== Utility ===== */
        .text-accent { color: var(--accent) !important; }
        .text-energy { color: var(--energy) !important; }
        .bg-accent-light { background: rgba(var(--accent-rgb), 0.08); }
        .gap-2 { gap: 8px; }
        .gap-3 { gap: 16px; }
        .gap-4 { gap: 24px; }
        .mt-2 { margin-top: 8px; }
        .mt-3 { margin-top: 16px; }
        .mt-4 { margin-top: 24px; }
        .mt-5 { margin-top: 40px; }
        .mb-0 { margin-bottom: 0; }
        .mb-2 { margin-bottom: 8px; }
        .mb-3 { margin-bottom: 16px; }
        .mb-4 { margin-bottom: 24px; }
        .mb-5 { margin-bottom: 40px; }
        .text-center { text-align: center; }
        .fw-bold { font-weight: 700; }
        .fw-semibold { font-weight: 600; }

        /* ===== Smooth Scrollbar ===== */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--bg); }
        ::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

        /* ===== Selection ===== */
        ::selection { background: rgba(var(--accent-rgb), 0.25); color: var(--primary); }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --accent-light: #f9c74f;
            --bg-body: #f8f9fa;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-footer: #0d1b2a;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #6c757d;
            --text-light: #f8f9fa;
            --border-color: #e0e0e0;
            --border-light: #f0f0f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.10);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-hover: 0 12px 40px rgba(230,57,70,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            padding-left: 20px;
            padding-right: 20px;
            margin: 0 auto;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(12px);
            background: rgba(255,255,255,0.96);
        }

        .site-header .navbar {
            padding: 10px 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.45rem;
            color: var(--primary) !important;
            transition: var(--transition);
        }
        .navbar-brand:hover {
            transform: scale(1.02);
            color: var(--primary-dark) !important;
        }
        .brand-icon {
            font-size: 1.6rem;
            color: var(--primary);
            filter: drop-shadow(0 2px 6px rgba(230,57,70,0.3));
        }
        .brand-text {
            letter-spacing: 0.5px;
        }

        /* Search Box */
        .search-box .input-group {
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0,0,0,0.06);
            transition: var(--transition);
            max-width: 420px;
        }
        .search-box .input-group:focus-within {
            box-shadow: 0 2px 20px rgba(230,57,70,0.18);
        }
        .search-box .input-group-text {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-right: none;
            color: var(--text-muted);
            padding: 0 16px;
        }
        .search-box .form-control {
            border: 1px solid var(--border-color);
            border-left: none;
            border-right: none;
            padding: 10px 16px;
            font-size: 0.95rem;
            background: var(--bg-card);
        }
        .search-box .form-control:focus {
            box-shadow: none;
            border-color: var(--primary);
        }
        .search-box .btn-search {
            background: var(--primary);
            color: #fff;
            border: 1px solid var(--primary);
            padding: 10px 22px;
            font-weight: 600;
            border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
            transition: var(--transition);
        }
        .search-box .btn-search:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
        }

        /* Nav Links */
        .navbar-nav .nav-link {
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            font-size: 0.95rem;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(230,57,70,0.06);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary);
            background: rgba(230,57,70,0.10);
            font-weight: 600;
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        .navbar-toggler {
            border: 1px solid var(--border-color);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(230,57,70,0.2);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(26,26,46,0.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== Article Detail ===== */
        .article-detail-section {
            padding: 60px 0 80px;
        }

        .article-breadcrumb {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .article-breadcrumb a {
            color: var(--secondary-light);
        }
        .article-breadcrumb a:hover {
            color: var(--primary);
        }
        .article-breadcrumb .separator {
            margin: 0 10px;
            color: var(--border-color);
        }

        .article-header {
            margin-bottom: 32px;
        }
        .article-header .category-badge {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 4px 18px;
            border-radius: var(--radius-xl);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        .article-header h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-muted);
            font-size: 0.9rem;
            align-items: center;
        }
        .article-meta i {
            margin-right: 6px;
            color: var(--primary-light);
        }
        .article-meta .meta-item {
            display: flex;
            align-items: center;
        }

        .article-featured-image {
            margin-bottom: 36px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .article-featured-image img {
            width: 100%;
            height: auto;
            max-height: 500px;
            object-fit: cover;
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-content h2,
        .article-content h3,
        .article-content h4 {
            margin-top: 36px;
            margin-bottom: 16px;
            font-weight: 700;
            color: var(--text-primary);
        }
        .article-content h2 {
            font-size: 1.7rem;
            border-bottom: 2px solid var(--border-light);
            padding-bottom: 10px;
        }
        .article-content h3 {
            font-size: 1.35rem;
        }
        .article-content p {
            margin-bottom: 18px;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content a {
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(230,57,70,0.05);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-secondary);
        }
        .article-content img {
            margin: 24px 0;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .article-content .table-wrap {
            overflow-x: auto;
            margin: 24px 0;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            overflow: hidden;
        }
        .article-content table th,
        .article-content table td {
            padding: 12px 16px;
            border: 1px solid var(--border-light);
            text-align: left;
        }
        .article-content table th {
            background: var(--secondary);
            color: #fff;
            font-weight: 600;
        }

        .article-tags {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .article-tags .tag {
            display: inline-block;
            background: var(--bg-body);
            color: var(--text-secondary);
            padding: 6px 18px;
            border-radius: var(--radius-xl);
            font-size: 0.85rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* Article Sidebar */
        .article-sidebar {
            position: sticky;
            top: 100px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            margin-bottom: 24px;
        }
        .sidebar-card h5 {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 16px;
            color: var(--text-primary);
            border-bottom: 2px solid var(--primary-light);
            padding-bottom: 10px;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            color: var(--text-secondary);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .sidebar-card ul li a i {
            color: var(--primary-light);
            font-size: 0.8rem;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
        }
        .sidebar-cta h5 {
            color: #fff;
            border-bottom: none;
            font-size: 1.2rem;
        }
        .sidebar-cta p {
            font-size: 0.9rem;
            opacity: 0.9;
            margin-bottom: 18px;
        }
        .sidebar-cta .btn-cta {
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            padding: 10px 28px;
            border-radius: var(--radius-xl);
            border: none;
            transition: var(--transition);
        }
        .sidebar-cta .btn-cta:hover {
            background: var(--accent-light);
            color: var(--text-primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.15);
        }

        /* Not Found */
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found .not-found-icon {
            font-size: 4rem;
            color: var(--primary-light);
            margin-bottom: 24px;
        }
        .article-not-found h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .article-not-found p {
            color: var(--text-muted);
            font-size: 1.1rem;
            margin-bottom: 24px;
        }
        .article-not-found .btn-home {
            background: var(--primary);
            color: #fff;
            padding: 12px 36px;
            border-radius: var(--radius-xl);
            font-weight: 600;
            transition: var(--transition);
            border: none;
        }
        .article-not-found .btn-home:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== Related Articles ===== */
        .related-section {
            background: var(--bg-body);
            padding: 60px 0;
            border-top: 1px solid var(--border-light);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 32px;
            text-align: center;
        }
        .related-section .section-title span {
            color: var(--primary);
        }

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            height: 100%;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-category {
            font-size: 0.75rem;
            color: var(--primary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .related-card .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .related-card .card-title a {
            color: var(--text-primary);
        }
        .related-card .card-title a:hover {
            color: var(--primary);
        }
        .related-card .card-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 12px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-footer);
            color: rgba(255,255,255,0.85);
            padding: 50px 0 30px;
            border-top: 4px solid var(--primary);
        }
        .site-footer .footer-brand {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand i {
            color: var(--primary-light);
        }
        .site-footer p {
            font-size: 0.95rem;
            opacity: 0.8;
            max-width: 500px;
            margin: 0 auto 20px;
        }
        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 18px;
            margin-bottom: 20px;
        }
        .site-footer .footer-links a {
            color: rgba(255,255,255,0.75);
            font-size: 0.9rem;
            transition: var(--transition);
            position: relative;
        }
        .site-footer .footer-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-light);
            transition: var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: #fff;
        }
        .site-footer .footer-links a:hover::after {
            width: 100%;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            font-size: 0.85rem;
            opacity: 0.7;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199px) {
            .article-header h1 {
                font-size: 2rem;
            }
        }

        @media (max-width: 991px) {
            .site-header .navbar {
                padding: 8px 0;
            }
            .navbar-brand {
                font-size: 1.25rem;
            }
            .search-box.mobile-show {
                margin: 12px 0 8px;
            }
            .search-box.mobile-show .input-group {
                max-width: 100%;
            }
            .navbar-nav .nav-link {
                padding: 10px 16px;
            }
            .navbar-nav .nav-link.active::after {
                display: none;
            }

            .article-detail-section {
                padding: 40px 0 60px;
            }
            .article-header h1 {
                font-size: 1.7rem;
            }
            .article-content {
                font-size: 1rem;
            }
            .article-sidebar {
                margin-top: 40px;
                position: static;
            }
        }

        @media (max-width: 767px) {
            .article-detail-section {
                padding: 28px 0 40px;
            }
            .article-header h1 {
                font-size: 1.4rem;
            }
            .article-meta {
                gap: 12px;
                font-size: 0.8rem;
            }
            .article-content h2 {
                font-size: 1.35rem;
            }
            .article-content h3 {
                font-size: 1.15rem;
            }
            .article-breadcrumb {
                font-size: 0.8rem;
            }
            .related-section .section-title {
                font-size: 1.3rem;
            }

            .site-footer {
                padding: 36px 0 24px;
            }
            .site-footer .footer-brand {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .article-header h1 {
                font-size: 1.2rem;
            }
            .article-content {
                font-size: 0.95rem;
            }
            .article-content h2 {
                font-size: 1.2rem;
            }
            .sidebar-card {
                padding: 16px;
            }
        }

        /* ===== Accessibility & Print ===== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition: none !important;
                animation: none !important;
            }
        }

        @media print {
            .site-header,
            .site-footer,
            .article-sidebar,
            .related-section {
                display: none !important;
            }
            .article-detail-section {
                padding: 20px 0;
            }
            body {
                background: #fff;
                color: #000;
            }
        }

        /* ===== Skeleton Loading ===== */
        .skeleton {
            background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
            background-size: 200% 100%;
            animation: skeleton-loading 1.5s infinite;
            border-radius: var(--radius-sm);
        }
        @keyframes skeleton-loading {
            0% { background-position: 200% 0; }
            100% { background-position: -200% 0; }
        }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #457b9d;
            --secondary-dark: #1d3557;
            --accent: #f4a261;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #1d3557;
            --text-dark: #212529;
            --text-muted: #6c757d;
            --text-light: #f8f9fa;
            --border-color: #dee2e6;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.14);
            --transition: all 0.3s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container-max: 1140px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

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

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            padding-left: 20px;
            padding-right: 20px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-white);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 0;
            z-index: 1050;
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }

        .navbar {
            padding-top: 0;
            padding-bottom: 0;
            width: 100%;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--primary) !important;
            padding: 0;
        }
        .navbar-brand .brand-icon {
            font-size: 1.8rem;
            color: var(--primary);
        }
        .navbar-brand .brand-text {
            letter-spacing: 1px;
        }

        /* 搜索框 (桌面) */
        .search-box {
            flex: 1;
            max-width: 400px;
            margin: 0 20px;
        }
        .search-box .input-group {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .search-box .input-group:focus-within {
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.15);
            border-color: var(--primary-light);
        }
        .search-box .input-group-text {
            background: var(--bg-white);
            border: none;
            color: var(--text-muted);
            padding-left: 16px;
        }
        .search-box .form-control {
            border: none;
            padding: 10px 0 10px 4px;
            font-size: 0.95rem;
            background: var(--bg-white);
        }
        .search-box .form-control:focus {
            box-shadow: none;
        }
        .search-box .btn-search {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 8px 20px;
            font-weight: 600;
            border-radius: 0;
            transition: var(--transition);
        }
        .search-box .btn-search:hover {
            background: var(--primary-dark);
        }

        /* 导航项 */
        .navbar-nav .nav-link {
            font-weight: 500;
            color: var(--text-dark);
            padding: 8px 18px !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.05);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.10);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        .navbar-toggler {
            border: none;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.2);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(33,37,41,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* 移动端搜索 (折叠内) */
        .search-box.mobile-show {
            max-width: 100%;
            margin: 12px 0 8px;
        }
        .search-box.mobile-show .input-group {
            width: 100%;
        }

        /* ===== Hero 板块 ===== */
        .category-hero {
            background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--secondary) 100%);
            padding: 72px 0 60px;
            color: var(--text-light);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -8%;
            width: 240px;
            height: 240px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(4px);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 1px;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.10);
        }
        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .category-hero h1 i {
            margin-right: 12px;
            color: var(--accent);
        }
        .category-hero .lead {
            font-size: 1.2rem;
            max-width: 680px;
            margin: 0 auto 28px;
            opacity: 0.90;
            line-height: 1.8;
        }
        .category-hero .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            flex-wrap: wrap;
            margin-top: 32px;
        }
        .category-hero .hero-stats .stat-item {
            text-align: center;
        }
        .category-hero .hero-stats .stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
            display: block;
        }
        .category-hero .hero-stats .stat-label {
            font-size: 0.90rem;
            opacity: 0.75;
        }

        /* ===== 板块通用 ===== */
        .section-padding {
            padding: 72px 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-dark);
            text-align: center;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 48px;
            text-align: center;
            line-height: 1.7;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 12px auto 40px;
        }

        .bg-white-block {
            background: var(--bg-white);
        }
        .bg-light-block {
            background: var(--bg-light);
        }

        /* ===== 登录方式卡片 ===== */
        .method-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .method-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
        }
        .method-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .method-card .method-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(230, 57, 70, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .method-card:hover .method-icon {
            background: var(--primary);
            color: #fff;
        }
        .method-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .method-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .method-card .method-tag {
            display: inline-block;
            background: rgba(69, 123, 157, 0.10);
            color: var(--secondary);
            font-size: 0.80rem;
            font-weight: 500;
            padding: 4px 14px;
            border-radius: 50px;
            margin-top: 12px;
        }

        /* ===== 步骤流程 ===== */
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 28px;
            max-width: 780px;
            margin: 0 auto;
        }
        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            background: var(--bg-white);
            padding: 24px 28px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border-left: 4px solid var(--primary);
            transition: var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
        }
        .step-number {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }
        .step-content {
            flex: 1;
        }
        .step-content h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .step-content p {
            color: var(--text-muted);
            margin-bottom: 0;
            font-size: 0.95rem;
        }

        /* ===== 安全提示 ===== */
        .safety-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .safety-item {
            display: flex;
            gap: 16px;
            align-items: center;
            background: var(--bg-white);
            padding: 20px 24px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .safety-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .safety-item .safety-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(69, 123, 157, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--secondary);
        }
        .safety-item .safety-text h5 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .safety-item .safety-text p {
            font-size: 0.90rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--bg-white);
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text-dark);
            transition: var(--transition);
        }
        .faq-question:hover {
            background: rgba(230, 57, 70, 0.03);
        }
        .faq-question .faq-toggle {
            font-size: 1.2rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .faq-question[aria-expanded="true"] .faq-toggle {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-answer p {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 60px 0;
            text-align: center;
            color: #fff;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-block p {
            font-size: 1.1rem;
            opacity: 0.90;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-block .btn-cta {
            background: #fff;
            color: var(--primary);
            border: none;
            padding: 14px 44px;
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 50px;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }
        .cta-block .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.20);
            background: var(--bg-light);
        }
        .cta-block .btn-cta i {
            margin-right: 8px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 48px 0 36px;
        }
        .site-footer .footer-brand {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand i {
            color: var(--primary-light);
        }
        .site-footer p {
            font-size: 0.95rem;
            opacity: 0.75;
            max-width: 480px;
            margin: 0 auto 20px;
        }
        .site-footer .footer-links {
            display: flex;
            justify-content: center;
            gap: 28px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: #fff;
        }
        .site-footer .footer-bottom {
            font-size: 0.85rem;
            opacity: 0.60;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            margin-top: 8px;
        }

        /* ===== 按钮通用 ===== */
        .btn-outline-primary {
            border-color: var(--primary);
            color: var(--primary);
            border-radius: 50px;
            padding: 8px 28px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-outline-primary:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .method-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }
            .section-padding {
                padding: 48px 0;
            }
            .category-hero {
                padding: 48px 0 40px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero .lead {
                font-size: 1rem;
            }
            .category-hero .hero-stats {
                gap: 24px;
            }
            .category-hero .hero-stats .stat-number {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            .method-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .method-card {
                padding: 24px 16px 20px;
            }
            .method-card .method-icon {
                width: 52px;
                height: 52px;
                font-size: 1.3rem;
            }
            .step-item {
                padding: 18px 20px;
                flex-direction: column;
                gap: 12px;
            }
            .safety-grid {
                grid-template-columns: 1fr;
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }
            .cta-block .btn-cta {
                padding: 12px 32px;
                font-size: 0.95rem;
            }
            .site-footer {
                padding: 36px 0 28px;
            }
            .site-footer .footer-links {
                gap: 16px;
            }
            .navbar-brand {
                font-size: 1.2rem;
            }
            .navbar-brand .brand-icon {
                font-size: 1.4rem;
            }
        }

        @media (max-width: 576px) {
            .method-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .category-hero .hero-stats {
                flex-direction: column;
                gap: 12px;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .faq-question {
                font-size: 0.95rem;
                padding: 14px 18px;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.90rem;
            }
            .step-item {
                padding: 16px;
            }
            .safety-item {
                padding: 16px 18px;
            }
        }

        /* ===== 辅助 ===== */
        .text-primary {
            color: var(--primary) !important;
        }
        .bg-primary {
            background-color: var(--primary) !important;
        }
        .rounded-pill {
            border-radius: 50px !important;
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .mt-2 {
            margin-top: 8px;
        }
        .mt-3 {
            margin-top: 16px;
        }
        .mb-0 {
            margin-bottom: 0;
        }