/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg-dark: #0b0f1a;
            --bg-card: #111827;
            --bg-card-hover: #1a2332;
            --bg-section: #0f1623;
            --bg-light: #f8f9fa;
            --text-white: #ffffff;
            --text-light: #e0e0e0;
            --text-muted: #8892a4;
            --text-dark: #1a1a2e;
            --border-color: rgba(255,255,255,0.08);
            --border-light: rgba(255,255,255,0.15);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.4);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 40px rgba(230,57,70,0.15);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --spacing-section: 80px;
            --container-max: 1200px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-light);
            background: var(--bg-dark);
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); font-weight: 700; line-height: 1.25; color: var(--text-white); }
        h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
        h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
        h3 { font-size: clamp(1.3rem, 2.2vw, 1.8rem); }
        h4 { font-size: 1.25rem; }
        p { margin-bottom: 1rem; color: var(--text-light); }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
            :root { --spacing-section: 50px; }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(11, 15, 26, 0.98);
            box-shadow: 0 4px 30px rgba(0,0,0,0.5);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            padding: 0 24px;
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            box-shadow: 0 0 20px rgba(230,57,70,0.3);
        }
        .logo span { color: var(--primary); }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            position: relative;
        }
        .nav-list a:hover,
        .nav-list a.active {
            color: var(--text-white);
            background: rgba(230,57,70,0.12);
        }
        .nav-list a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(230,57,70,0.3);
            margin-left: 12px;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(230,57,70,0.45);
            color: #fff;
        }
        .mobile-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            color: var(--text-white);
            font-size: 1.4rem;
            border-radius: 8px;
            background: rgba(255,255,255,0.06);
        }
        @media (max-width: 868px) {
            .nav-list { display: none; }
            .nav-list.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(11,15,26,0.98);
                backdrop-filter: blur(20px);
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
            }
            .nav-list.open a { width: 100%; padding: 12px 16px; }
            .nav-list.open a.active::after { display: none; }
            .mobile-toggle { display: flex; }
            .nav-cta { margin-left: auto; }
        }
        @media (max-width: 520px) {
            .nav-cta { padding: 8px 16px; font-size: 0.82rem; gap: 4px; }
            .logo { font-size: 1.15rem; }
            .logo-icon { width: 32px; height: 32px; font-size: 1rem; }
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: 70px;
            overflow: hidden;
            background: var(--bg-dark);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background:
                radial-gradient(ellipse 80% 60% at 20% 30%, rgba(230,57,70,0.12) 0%, transparent 70%),
                radial-gradient(ellipse 70% 50% at 80% 70%, rgba(69,123,157,0.08) 0%, transparent 60%),
                radial-gradient(ellipse 50% 40% at 50% 50%, rgba(244,162,97,0.04) 0%, transparent 50%);
        }
        .hero-particles {
            position: absolute;
            inset: 0;
            z-index: 1;
            overflow: hidden;
        }
        .hero-particles span {
            position: absolute;
            width: 4px;
            height: 4px;
            background: rgba(230,57,70,0.3);
            border-radius: 50%;
            animation: floatParticle 20s infinite ease-in-out;
        }
        .hero-particles span:nth-child(1) { top: 10%; left: 15%; animation-delay: 0s; width: 6px; height: 6px; }
        .hero-particles span:nth-child(2) { top: 25%; left: 75%; animation-delay: 3s; background: rgba(69,123,157,0.25); }
        .hero-particles span:nth-child(3) { top: 60%; left: 20%; animation-delay: 6s; width: 5px; height: 5px; }
        .hero-particles span:nth-child(4) { top: 80%; left: 80%; animation-delay: 9s; background: rgba(244,162,97,0.2); }
        .hero-particles span:nth-child(5) { top: 40%; left: 50%; animation-delay: 12s; width: 3px; height: 3px; }
        .hero-particles span:nth-child(6) { top: 70%; left: 10%; animation-delay: 15s; background: rgba(230,57,70,0.2); width: 5px; height: 5px; }
        @keyframes floatParticle {
            0%, 100% { transform: translateY(0) scale(1); opacity: 0.3; }
            50% { transform: translateY(-120px) scale(1.6); opacity: 0.8; }
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            padding-top: 40px;
            padding-bottom: 60px;
        }
        .hero-content { max-width: 620px; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(230,57,70,0.12);
            border: 1px solid rgba(230,57,70,0.25);
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--primary-light);
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }
        .hero-badge i { font-size: 0.7rem; }
        .hero h1 {
            margin-bottom: 20px;
            background: linear-gradient(135deg, #ffffff 30%, rgba(255,255,255,0.7) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero h1 em { font-style: normal; color: var(--primary); -webkit-text-fill-color: var(--primary); }
        .hero p {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 32px;
            max-width: 540px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            box-shadow: 0 6px 30px rgba(230,57,70,0.3);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(230,57,70,0.45);
            color: #fff;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border: 2px solid var(--border-light);
            border-radius: var(--radius-sm);
            color: var(--text-light);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            background: transparent;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(230,57,70,0.06);
        }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 40px;
        }
        .hero-stat-card {
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            text-align: center;
            backdrop-filter: blur(10px);
            transition: var(--transition);
        }
        .hero-stat-card:hover {
            background: rgba(255,255,255,0.07);
            border-color: var(--border-light);
            transform: translateY(-4px);
        }
        .hero-stat-card .number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
        }
        .hero-stat-card .number span { color: var(--primary); }
        .hero-stat-card .label {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        .hero-visual-inner {
            width: 100%;
            max-width: 500px;
            aspect-ratio: 1/0.85;
            background: linear-gradient(145deg, rgba(230,57,70,0.08), rgba(69,123,157,0.06));
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 30px;
            display: flex;
            flex-direction: column;
            gap: 20px;
            backdrop-filter: blur(10px);
            box-shadow: var(--shadow-glow);
        }
        .visual-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .visual-tag {
            padding: 6px 18px;
            background: rgba(255,255,255,0.06);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .visual-tag.highlight {
            background: rgba(230,57,70,0.15);
            border-color: rgba(230,57,70,0.3);
            color: var(--primary-light);
        }
        .visual-card {
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            border-left: 4px solid var(--primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .visual-card .v-info { display: flex; align-items: center; gap: 12px; }
        .visual-card .v-info i { font-size: 1.2rem; color: var(--primary); width: 28px; text-align: center; }
        .visual-card .v-info .v-title { font-weight: 600; color: var(--text-white); font-size: 0.95rem; }
        .visual-card .v-info .v-sub { font-size: 0.8rem; color: var(--text-muted); }
        .visual-card .v-status {
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(46,204,113,0.15);
            color: #2ecc71;
        }
        .visual-card .v-status.live { background: rgba(230,57,70,0.15); color: var(--primary); animation: pulseLive 1.5s infinite; }
        @keyframes pulseLive {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.6; }
        }
        @media (max-width: 968px) {
            .hero .container { grid-template-columns: 1fr; gap: 30px; text-align: center; }
            .hero-content { max-width: 100%; }
            .hero p { margin-left: auto; margin-right: auto; }
            .hero-actions { justify-content: center; }
            .hero-stats { max-width: 500px; margin-left: auto; margin-right: auto; }
            .hero-visual-inner { max-width: 450px; margin: 0 auto; }
        }
        @media (max-width: 520px) {
            .hero-stats { grid-template-columns: repeat(3, 1fr); gap: 10px; }
            .hero-stat-card { padding: 14px 10px; }
            .hero-stat-card .number { font-size: 1.3rem; }
            .hero-actions { flex-direction: column; align-items: stretch; }
            .btn-primary, .btn-outline { justify-content: center; }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--spacing-section) 0;
            position: relative;
        }
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px;
        }
        .section-header h2 {
            margin-bottom: 14px;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
        }
        .section-subtitle {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 4px 16px;
            background: rgba(230,57,70,0.08);
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--primary-light);
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        /* ===== 分类入口 ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .category-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            transition: var(--transition);
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .category-card:hover::before { opacity: 1; }
        .category-card:hover {
            border-color: rgba(230,57,70,0.3);
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            background: var(--bg-card-hover);
        }
        .category-card .icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            background: linear-gradient(135deg, rgba(230,57,70,0.12), rgba(69,123,157,0.08));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .category-card:hover .icon { background: linear-gradient(135deg, rgba(230,57,70,0.2), rgba(69,123,157,0.12)); transform: scale(1.05); }
        .category-card h3 { font-size: 1.1rem; margin-bottom: 6px; }
        .category-card p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0; }
        .category-card .tag-count {
            display: inline-block;
            margin-top: 12px;
            padding: 2px 12px;
            background: rgba(255,255,255,0.05);
            border-radius: 50px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        @media (max-width: 968px) {
            .categories-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .categories-grid { grid-template-columns: 1fr; }
        }

        /* ===== 资讯/内容列表 ===== */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .content-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            border-color: rgba(230,57,70,0.25);
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .content-card .thumb {
            height: 180px;
            background: linear-gradient(145deg, rgba(230,57,70,0.06), rgba(69,123,157,0.04));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.2rem;
            color: var(--text-muted);
            position: relative;
            overflow: hidden;
        }
        .content-card .thumb .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(11,15,26,0.6) 0%, transparent 60%);
        }
        .content-card .thumb .cat-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            background: rgba(230,57,70,0.85);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            color: #fff;
            backdrop-filter: blur(4px);
        }
        .content-card .body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .content-card .body .meta {
            display: flex;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .content-card .body .meta i { margin-right: 4px; }
        .content-card .body h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-card .body p {
            font-size: 0.88rem;
            color: var(--text-muted);
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }
        .content-card .body .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
        }
        .content-card .body .read-more i { transition: var(--transition); }
        .content-card .body .read-more:hover i { transform: translateX(4px); }
        .empty-list {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            background: var(--bg-card);
            border: 1px dashed var(--border-color);
            border-radius: var(--radius-md);
        }
        .empty-list i { font-size: 2.4rem; margin-bottom: 16px; opacity: 0.4; }
        @media (max-width: 968px) {
            .content-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .content-grid { grid-template-columns: 1fr; }
        }

        /* ===== 数据/流程 ===== */
        .stats-showcase {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            transition: var(--transition);
        }
        .stat-item:hover {
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }
        .stat-item .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
        }
        .stat-item .stat-num span { color: var(--primary); }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 6px;
        }
        .stat-item .stat-icon {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 12px;
            opacity: 0.6;
        }
        @media (max-width: 968px) {
            .stats-showcase { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .stats-showcase { grid-template-columns: 1fr; }
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            position: relative;
            transition: var(--transition);
            counter-increment: step;
        }
        .step-card:hover {
            border-color: rgba(230,57,70,0.2);
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }
        .step-card .step-number {
            font-size: 3rem;
            font-weight: 800;
            color: rgba(230,57,70,0.12);
            position: absolute;
            top: 12px;
            right: 20px;
            line-height: 1;
        }
        .step-card .step-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, rgba(230,57,70,0.12), rgba(69,123,157,0.08));
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .step-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0; }
        @media (max-width: 868px) {
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .steps-grid { grid-template-columns: 1fr; }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: rgba(230,57,70,0.15); }
        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            text-align: left;
            background: transparent;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover { color: var(--primary-light); }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p { margin-bottom: 0; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(230,57,70,0.06), rgba(69,123,157,0.04));
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 50%, rgba(230,57,70,0.04) 0%, transparent 50%);
            pointer-events: none;
        }
        .cta-section h2 { margin-bottom: 14px; }
        .cta-section p { color: var(--text-muted); max-width: 560px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: rgba(11,15,26,0.95);
            border-top: 1px solid var(--border-color);
            padding: 50px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { font-size: 1.3rem; margin-bottom: 14px; }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-muted);
            max-width: 320px;
            margin-bottom: 18px;
        }
        .footer-social {
            display: flex;
            gap: 10px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: rgba(230,57,70,0.12);
            border-color: rgba(230,57,70,0.3);
            color: var(--primary);
        }
        .footer-col h4 {
            font-size: 0.95rem;
            color: var(--text-white);
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-col ul li a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary-light); }
        @media (max-width: 868px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== 分隔线 ===== */
        .divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-color), transparent);
            margin: 0;
        }

        /* ===== 滚动动画 ===== */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 768px) {
            .section-header { margin-bottom: 32px; }
            .cta-section { padding: 40px 20px; }
        }
        @media (max-width: 480px) {
            .hero-stat-card .number { font-size: 1.1rem; }
            .stat-item .stat-num { font-size: 2rem; }
            .faq-question { padding: 14px 16px; font-size: 0.92rem; }
        }
        /* 滚动条美化 */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg-dark); }
        ::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

        /* 选中文本 */
        ::selection { background: rgba(230,57,70,0.3); color: #fff; }

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
  --primary: #0f0f1a;
  --primary-light: #1a1a30;
  --primary-lighter: #242445;
  --secondary: #e94560;
  --secondary-hover: #ff5a7a;
  --accent: #0f3460;
  --gold: #f5a623;
  --gold-light: #ffc44d;
  --bg-body: #08081a;
  --bg-card: #12122a;
  --bg-card-hover: #1c1c40;
  --bg-section: #0c0c22;
  --text-primary: #f0f0f8;
  --text-secondary: #b0b0c8;
  --text-muted: #6c6c88;
  --border-color: #2a2a50;
  --border-light: #3a3a60;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow: 0 12px 48px rgba(0,0,0,0.5);
  --shadow-sm: 0 6px 24px rgba(0,0,0,0.35);
  --shadow-card: 0 8px 32px rgba(233,69,96,0.08);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --container: 1200px;
  --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: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--gold); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--gold-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
button { cursor: pointer; background: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
h1 { font-size: 2.4rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.15rem; }
p { margin-bottom: 1rem; color: var(--text-secondary); }
small { font-size: 0.85rem; color: var(--text-muted); }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 2.2rem; margin-bottom: 12px; background: linear-gradient(135deg, #f0f0f8 0%, var(--gold) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.section-title p { font-size: 1.1rem; color: var(--text-muted); max-width: 600px; margin: 0 auto; }
.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  background: var(--secondary);
  color: #fff;
}
.badge-gold { background: var(--gold); color: #1a1a2e; }
.badge-outline { background: transparent; border: 1px solid var(--border-light); color: var(--text-secondary); }

/* ===== Header & Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(8, 8, 26, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  height: var(--nav-height);
  transition: var(--transition);
}
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.5px;
}
.logo i { color: var(--secondary); font-size: 1.7rem; }
.logo span { background: linear-gradient(135deg, var(--gold) 0%, var(--secondary) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}
.nav-list a i { font-size: 0.9rem; }
.nav-list a:hover { color: var(--text-primary); background: var(--primary-lighter); }
.nav-list a.active {
  color: var(--text-primary);
  background: var(--secondary);
  box-shadow: 0 4px 20px rgba(233,69,96,0.3);
}
.nav-list a.active:hover { background: var(--secondary-hover); }
.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn-nav {
  padding: 8px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.88rem;
  background: var(--gold);
  color: #1a1a2e;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.btn-nav:hover { background: var(--gold-light); color: #1a1a2e; transform: translateY(-1px); box-shadow: 0 6px 24px rgba(245,166,35,0.3); }
.mobile-toggle { display: none; font-size: 1.5rem; color: var(--text-primary); padding: 8px; border-radius: 8px; background: var(--primary-lighter); }

/* ===== Hero (Article Header) ===== */
.article-hero {
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 40px;
  background: var(--bg-section);
  position: relative;
  overflow: hidden;
}
.article-hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(233,69,96,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.article-hero .container { position: relative; z-index: 1; }
.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.article-breadcrumb a { color: var(--text-muted); }
.article-breadcrumb a:hover { color: var(--gold); }
.article-breadcrumb .sep { color: var(--border-light); }
.article-category {
  display: inline-block;
  padding: 6px 18px;
  border-radius: 20px;
  background: var(--secondary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}
.article-hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  max-width: 900px;
  background: linear-gradient(135deg, #fff 0%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 0.92rem;
}
.article-meta span { display: flex; align-items: center; gap: 6px; }
.article-meta i { color: var(--secondary); font-size: 0.85rem; }
.article-meta .author { color: var(--gold); font-weight: 500; }

/* ===== Article Content ===== */
.article-main {
  padding: 48px 0 80px;
  background: var(--bg-body);
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}
.article-content-area {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 40px 44px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
}
.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}
.article-body h2, .article-body h3 { margin-top: 36px; margin-bottom: 16px; color: var(--text-primary); }
.article-body h2 { font-size: 1.6rem; }
.article-body h3 { font-size: 1.25rem; }
.article-body p { margin-bottom: 1.2rem; color: var(--text-secondary); }
.article-body ul, .article-body ol { margin-bottom: 1.2rem; padding-left: 24px; color: var(--text-secondary); }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 6px; }
.article-body a { color: var(--gold); border-bottom: 1px solid transparent; }
.article-body a:hover { border-bottom-color: var(--gold); }
.article-body blockquote {
  border-left: 4px solid var(--secondary);
  padding: 16px 24px;
  margin: 24px 0;
  background: rgba(233,69,96,0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
}
.article-body blockquote p { margin-bottom: 0; }
.article-body img { border-radius: var(--radius-sm); margin: 24px 0; }
.article-body code {
  background: var(--primary-lighter);
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.9rem;
  color: var(--gold);
}
.article-body pre {
  background: var(--primary-lighter);
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--border-color);
}
.article-body pre code { background: none; padding: 0; color: var(--text-secondary); }
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
}
.article-tags .tag {
  padding: 6px 16px;
  border-radius: 20px;
  background: var(--primary-lighter);
  color: var(--text-secondary);
  font-size: 0.82rem;
  transition: var(--transition);
}
.article-tags .tag:hover { background: var(--primary-light); color: var(--gold); }
.article-share {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}
.article-share span { font-size: 0.92rem; color: var(--text-muted); }
.article-share a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-lighter);
  color: var(--text-secondary);
  transition: var(--transition);
  font-size: 1rem;
}
.article-share a:hover { background: var(--secondary); color: #fff; transform: translateY(-2px); }

/* ===== Sidebar ===== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.sidebar-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}
.sidebar-card h3 {
  font-size: 1.1rem;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
}
.sidebar-card h3 i { color: var(--secondary); }
.sidebar-list { display: flex; flex-direction: column; gap: 14px; }
.sidebar-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}
.sidebar-item:last-child { border-bottom: none; padding-bottom: 0; }
.sidebar-item .num {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--primary-lighter);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gold);
  flex-shrink: 0;
}
.sidebar-item .info { flex: 1; }
.sidebar-item .info h4 { font-size: 0.92rem; font-weight: 600; margin-bottom: 4px; }
.sidebar-item .info h4 a { color: var(--text-primary); }
.sidebar-item .info h4 a:hover { color: var(--gold); }
.sidebar-item .info span { font-size: 0.78rem; color: var(--text-muted); }
.sidebar-cta {
  text-align: center;
  padding: 24px;
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent) 100%);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}
.sidebar-cta h4 { font-size: 1.1rem; margin-bottom: 8px; color: var(--gold); }
.sidebar-cta p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 16px; }
.sidebar-cta .btn { display: inline-block; padding: 10px 28px; border-radius: 10px; background: var(--secondary); color: #fff; font-weight: 600; transition: var(--transition); }
.sidebar-cta .btn:hover { background: var(--secondary-hover); transform: translateY(-2px); box-shadow: 0 6px 24px rgba(233,69,96,0.3); }

/* ===== Article Navigation (Prev/Next) ===== */
.article-nav-section {
  padding: 32px 0 48px;
  background: var(--bg-body);
}
.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.article-nav a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 24px 28px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.article-nav a:hover { background: var(--bg-card-hover); border-color: var(--border-light); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.article-nav .nav-label { font-size: 0.8rem; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.article-nav .nav-label i { font-size: 0.75rem; }
.article-nav .nav-title { font-size: 1rem; font-weight: 600; color: var(--text-primary); }
.article-nav a:hover .nav-title { color: var(--gold); }
.article-nav .nav-next { text-align: right; }

/* ===== Related Posts ===== */
.related-section {
  padding: 60px 0 80px;
  background: var(--bg-section);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.related-card:hover { background: var(--bg-card-hover); border-color: var(--border-light); transform: translateY(-4px); box-shadow: var(--shadow-card); }
.related-card .cat { display: inline-block; padding: 4px 12px; border-radius: 16px; background: var(--primary-lighter); color: var(--gold); font-size: 0.72rem; font-weight: 600; margin-bottom: 12px; }
.related-card h4 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.related-card h4 a { color: var(--text-primary); }
.related-card h4 a:hover { color: var(--gold); }
.related-card p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .date { font-size: 0.78rem; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }

/* ===== CTA Section ===== */
.cta-section {
  padding: 64px 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  text-align: center;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.cta-section h2 { font-size: 2rem; margin-bottom: 12px; color: var(--text-primary); }
.cta-section p { font-size: 1.05rem; color: var(--text-muted); max-width: 600px; margin: 0 auto 28px; }
.cta-section .btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  border-radius: 12px;
  background: var(--secondary);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition);
}
.btn-primary:hover { background: var(--secondary-hover); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 32px rgba(233,69,96,0.35); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  border-radius: 12px;
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid var(--border-light);
  transition: var(--transition);
}
.btn-outline:hover { border-color: var(--gold); color: var(--gold); transform: translateY(-2px); }

/* ===== Footer ===== */
.footer {
  background: var(--primary);
  padding: 48px 0 28px;
  border-top: 1px solid var(--border-color);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p { font-size: 0.9rem; color: var(--text-muted); max-width: 360px; line-height: 1.6; }
.footer-col h4 { font-size: 1rem; font-weight: 600; margin-bottom: 18px; color: var(--text-primary); }
.footer-col a { display: block; font-size: 0.9rem; color: var(--text-muted); padding: 4px 0; }
.footer-col a:hover { color: var(--gold); padding-left: 4px; }
.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--gold); }

/* ===== Not Found State ===== */
.not-found-container {
  text-align: center;
  padding: 80px 24px;
}
.not-found-container i { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; }
.not-found-container h2 { font-size: 2rem; margin-bottom: 12px; }
.not-found-container p { color: var(--text-muted); margin-bottom: 24px; font-size: 1.1rem; }
.not-found-container .btn-back { display: inline-flex; align-items: center; gap: 8px; padding: 12px 32px; border-radius: 12px; background: var(--secondary); color: #fff; font-weight: 600; transition: var(--transition); }
.not-found-container .btn-back:hover { background: var(--secondary-hover); transform: translateY(-2px); box-shadow: 0 6px 24px rgba(233,69,96,0.3); }

/* ===== Error State for Article Content ===== */
.error-state {
  text-align: center;
  padding: 60px 24px;
}
.error-state i { font-size: 3.5rem; color: var(--text-muted); margin-bottom: 16px; }
.error-state h3 { font-size: 1.6rem; margin-bottom: 10px; }
.error-state p { color: var(--text-muted); margin-bottom: 20px; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-list { display: none; }
  .nav-list.open { display: flex; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; width: 100%; background: rgba(8,8,26,0.98); backdrop-filter: blur(20px); padding: 16px 24px; gap: 4px; border-bottom: 1px solid var(--border-color); }
  .nav-list a { width: 100%; padding: 14px 20px; }
  .nav-cta .btn-nav { display: none; }
  .mobile-toggle { display: block; }
  .article-hero h1 { font-size: 1.8rem; }
  .article-content-area { padding: 24px 20px; }
  .article-body { font-size: 0.98rem; }
  .article-nav { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .article-sidebar { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .section { padding: 48px 0; }
  .section-title h2 { font-size: 1.6rem; }
  .cta-section h2 { font-size: 1.5rem; }
  .article-hero { padding-top: calc(var(--nav-height) + 32px); padding-bottom: 24px; }
  .article-hero h1 { font-size: 1.6rem; }
  .article-meta { gap: 14px; font-size: 0.82rem; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-content-area { padding: 18px 14px; }
  .article-body { font-size: 0.92rem; }
  .article-hero h1 { font-size: 1.35rem; }
  .article-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
  .article-tags { gap: 6px; }
  .article-tags .tag { font-size: 0.72rem; padding: 4px 12px; }
  .sidebar-card { padding: 20px; }
  .related-card { padding: 20px; }
  .btn-primary, .btn-outline { padding: 12px 24px; font-size: 0.9rem; width: 100%; justify-content: center; }
  .cta-section .btn-group { flex-direction: column; gap: 12px; }
  .footer { padding: 32px 0 20px; }
  .not-found-container i { font-size: 2.8rem; }
  .not-found-container h2 { font-size: 1.4rem; }
}

/* ===== Mobile Toggle Animation ===== */
.mobile-toggle.active i::before { content: '\f00d'; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0d1b2a;
            --primary-light: #1b3a5c;
            --secondary: #f0a500;
            --secondary-light: #ffc54d;
            --accent: #00d4ff;
            --accent-dim: rgba(0, 212, 255, 0.15);
            --bg-dark: #0a0e27;
            --bg-card: #121a3a;
            --bg-card-hover: #1a254a;
            --bg-section: #0f1535;
            --text-primary: #ffffff;
            --text-secondary: #e0e0e0;
            --text-muted: #8899b0;
            --text-dark: #1a1a2e;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(240, 165, 0, 0.25);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 40px rgba(240, 165, 0, 0.08);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --container-w: 1200px;
            --nav-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary-light); }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }

        /* ===== 容器 ===== */
        .container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 14, 39, 0.85);
            backdrop-filter: blur(18px) saturate(160%);
            -webkit-backdrop-filter: blur(18px) saturate(160%);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .site-header.scrolled { background: rgba(10, 14, 39, 0.96); box-shadow: 0 4px 30px rgba(0,0,0,0.5); }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: var(--nav-height); max-width: var(--container-w); margin: 0 auto; padding: 0 24px;
        }
        .logo {
            font-size: 1.4rem; font-weight: 800; letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text;
            display: flex; align-items: center; gap: 10px;
        }
        .logo i { font-size: 1.5rem; -webkit-text-fill-color: var(--secondary); color: var(--secondary); }
        .nav-list { display: flex; align-items: center; gap: 6px; }
        .nav-list a {
            display: flex; align-items: center; gap: 8px;
            padding: 8px 20px; border-radius: 50px;
            font-size: 0.9rem; font-weight: 500; color: var(--text-secondary);
            transition: var(--transition); white-space: nowrap;
            background: transparent; border: 1px solid transparent;
        }
        .nav-list a i { font-size: 0.85rem; opacity: 0.7; }
        .nav-list a:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.08); }
        .nav-list a.active {
            color: var(--text-primary); background: rgba(240, 165, 0, 0.12);
            border-color: var(--border-glow); box-shadow: 0 0 20px rgba(240,165,0,0.05);
        }
        .nav-list a.active i { opacity: 1; color: var(--secondary); }
        .nav-cta {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 8px 24px; border-radius: 50px;
            background: linear-gradient(135deg, var(--secondary), #d48900);
            color: #0a0e27 !important; font-weight: 700; font-size: 0.9rem;
            border: none !important; box-shadow: 0 4px 20px rgba(240,165,0,0.25);
            transition: var(--transition);
        }
        .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(240,165,0,0.35); color: #0a0e27 !important; }
        .nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; background: none; border: none; cursor: pointer; }
        .nav-toggle span { display: block; width: 26px; height: 2.5px; background: var(--text-primary); border-radius: 4px; transition: var(--transition); }

        /* ===== Hero ===== */
        .hero-section {
            position: relative; min-height: 85vh; display: flex; align-items: center;
            padding: calc(var(--nav-height) + 40px) 0 80px;
            background: linear-gradient(160deg, #060a1e 0%, #0d1b2a 40%, #132244 70%, #0a0e27 100%);
            overflow: hidden;
        }
        .hero-section::before {
            content: ''; position: absolute; inset: 0;
            background: radial-gradient(ellipse 80% 60% at 30% 40%, rgba(240,165,0,0.04) 0%, transparent 70%),
                        radial-gradient(ellipse 60% 50% at 70% 60%, rgba(0,212,255,0.03) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
        .hero-content h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 900;
            background: linear-gradient(135deg, #fff 30%, var(--secondary) 100%);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text; margin-bottom: 20px; line-height: 1.2;
        }
        .hero-content .subtitle {
            font-size: 1.15rem; color: var(--text-secondary); max-width: 520px;
            margin-bottom: 32px; line-height: 1.8;
        }
        .hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 36px; }
        .hero-tags span {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 6px 16px; border-radius: 50px;
            background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08);
            color: var(--text-muted); font-size: 0.85rem; font-weight: 400;
        }
        .hero-tags span i { color: var(--secondary); font-size: 0.75rem; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
        .hero-actions .btn-primary {
            padding: 14px 36px; border-radius: 50px;
            background: linear-gradient(135deg, var(--secondary), #d48900);
            color: #0a0e27; font-weight: 700; font-size: 1rem;
            box-shadow: 0 8px 30px rgba(240,165,0,0.25);
            transition: var(--transition); display: inline-flex; align-items: center; gap: 10px;
        }
        .hero-actions .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(240,165,0,0.35); }
        .hero-actions .btn-outline {
            padding: 14px 36px; border-radius: 50px;
            border: 1.5px solid rgba(255,255,255,0.15); color: var(--text-primary);
            font-weight: 500; transition: var(--transition);
            display: inline-flex; align-items: center; gap: 10px;
        }
        .hero-actions .btn-outline:hover { border-color: var(--secondary); background: rgba(240,165,0,0.06); }
        .hero-visual { position: relative; display: flex; justify-content: center; align-items: center; }
        .hero-glow-ring {
            width: 380px; height: 380px; border-radius: 50%;
            background: radial-gradient(circle at 40% 50%, rgba(240,165,0,0.08) 0%, rgba(0,212,255,0.03) 40%, transparent 70%);
            position: relative; animation: pulseGlow 4s ease-in-out infinite alternate;
        }
        .hero-glow-ring::after {
            content: ''; position: absolute; inset: 30px;
            border-radius: 50%; border: 1px solid rgba(240,165,0,0.1);
            animation: spinSlow 20s linear infinite;
        }
        .hero-icon-stack { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); }
        .hero-icon-stack i { font-size: 4.5rem; color: var(--secondary); opacity: 0.6; }
        @keyframes pulseGlow { 0% { transform: scale(1); opacity: 0.6; } 100% { transform: scale(1.08); opacity: 1; } }
        @keyframes spinSlow { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

        /* ===== 通用板块 ===== */
        .section { padding: 90px 0; position: relative; }
        .section-alt { background: var(--bg-section); }
        .section-header { text-align: center; margin-bottom: 56px; }
        .section-header h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 800;
            margin-bottom: 14px; color: var(--text-primary);
        }
        .section-header p { color: var(--text-muted); max-width: 600px; margin: 0 auto; font-size: 1.05rem; }
        .section-header .overline {
            display: inline-block; font-size: 0.8rem; font-weight: 600; letter-spacing: 2px;
            color: var(--secondary); text-transform: uppercase; margin-bottom: 12px;
        }

        /* ===== 卡片网格 ===== */
        .card-grid { display: grid; gap: 28px; }
        .card-grid-4 { grid-template-columns: repeat(4, 1fr); }
        .card-grid-3 { grid-template-columns: repeat(3, 1fr); }
        .card-grid-2 { grid-template-columns: repeat(2, 1fr); }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card); border-radius: var(--radius-md);
            border: 1px solid var(--border-color); padding: 28px 24px;
            transition: var(--transition); position: relative; overflow: hidden;
        }
        .card:hover { background: var(--bg-card-hover); border-color: rgba(240,165,0,0.15); transform: translateY(-4px); box-shadow: var(--shadow-card); }
        .card-icon { width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin-bottom: 18px; background: rgba(240,165,0,0.08); color: var(--secondary); }
        .card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; color: var(--text-primary); }
        .card p { color: var(--text-muted); font-size: 0.92rem; line-height: 1.7; }
        .card .badge {
            display: inline-block; padding: 2px 12px; border-radius: 50px;
            font-size: 0.7rem; font-weight: 600; letter-spacing: 0.3px;
            background: rgba(240,165,0,0.12); color: var(--secondary); margin-top: 12px;
        }

        /* ===== 排行列表 ===== */
        .rank-list { display: flex; flex-direction: column; gap: 12px; }
        .rank-item {
            display: flex; align-items: center; gap: 16px;
            padding: 16px 20px; border-radius: var(--radius-sm);
            background: var(--bg-card); border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .rank-item:hover { background: var(--bg-card-hover); border-color: rgba(240,165,0,0.12); transform: translateX(4px); }
        .rank-number { font-size: 1.2rem; font-weight: 800; color: var(--secondary); min-width: 36px; }
        .rank-info { flex: 1; }
        .rank-info h4 { font-size: 1rem; font-weight: 600; color: var(--text-primary); }
        .rank-info span { font-size: 0.82rem; color: var(--text-muted); }
        .rank-stats { font-size: 0.85rem; color: var(--accent); font-weight: 500; white-space: nowrap; }
        .rank-tag {
            padding: 3px 14px; border-radius: 50px; font-size: 0.7rem; font-weight: 600;
            background: rgba(0,212,255,0.1); color: var(--accent); white-space: nowrap;
        }

        /* ===== 统计数字 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-card {
            text-align: center; padding: 32px 20px;
            background: var(--bg-card); border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .stat-card:hover { border-color: rgba(240,165,0,0.12); transform: translateY(-2px); }
        .stat-number { font-size: 2.4rem; font-weight: 900; background: linear-gradient(135deg, var(--secondary), var(--secondary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .stat-label { color: var(--text-muted); font-size: 0.92rem; margin-top: 6px; }

        /* ===== 流程步骤 ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .step-card {
            text-align: center; padding: 32px 20px;
            background: var(--bg-card); border-radius: var(--radius-md);
            border: 1px solid var(--border-color); position: relative;
            transition: var(--transition);
        }
        .step-card:hover { transform: translateY(-4px); border-color: rgba(240,165,0,0.12); }
        .step-num {
            width: 44px; height: 44px; border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), #d48900);
            color: #0a0e27; font-weight: 800; font-size: 1.1rem;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 16px; box-shadow: 0 4px 20px rgba(240,165,0,0.2);
        }
        .step-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; color: var(--text-primary); }
        .step-card p { color: var(--text-muted); font-size: 0.88rem; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card); border-radius: var(--radius-sm);
            border: 1px solid var(--border-color); overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: rgba(240,165,0,0.1); }
        .faq-question {
            width: 100%; padding: 18px 24px; display: flex; justify-content: space-between; align-items: center;
            color: var(--text-primary); font-weight: 600; font-size: 0.98rem;
            background: none; border: none; cursor: pointer; text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover { color: var(--secondary); }
        .faq-question i { font-size: 0.85rem; color: var(--secondary); transition: var(--transition); }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px; color: var(--text-muted); font-size: 0.92rem; line-height: 1.8;
        }
        .faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 18px; }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0; text-align: center;
            background: linear-gradient(160deg, #0d1b2a, #132244);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .cta-section h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; margin-bottom: 16px; }
        .cta-section p { color: var(--text-muted); max-width: 520px; margin: 0 auto 32px; font-size: 1.05rem; }
        .cta-btn {
            display: inline-flex; align-items: center; gap: 12px;
            padding: 16px 44px; border-radius: 50px;
            background: linear-gradient(135deg, var(--secondary), #d48900);
            color: #0a0e27; font-weight: 700; font-size: 1.05rem;
            box-shadow: 0 8px 30px rgba(240,165,0,0.2);
            transition: var(--transition);
        }
        .cta-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(240,165,0,0.3); color: #0a0e27; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #060a1e; border-top: 1px solid var(--border-color);
            padding: 56px 0 32px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo { font-size: 1.3rem; margin-bottom: 14px; }
        .footer-brand p { color: var(--text-muted); font-size: 0.9rem; max-width: 300px; line-height: 1.8; }
        .footer-col h4 { font-size: 0.95rem; font-weight: 700; color: var(--text-primary); margin-bottom: 16px; }
        .footer-col a {
            display: block; color: var(--text-muted); font-size: 0.88rem;
            padding: 4px 0; transition: var(--transition);
        }
        .footer-col a:hover { color: var(--secondary); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid var(--border-color); padding-top: 24px;
            display: flex; justify-content: space-between; align-items: center;
            flex-wrap: wrap; gap: 12px;
        }
        .footer-bottom p { color: var(--text-muted); font-size: 0.82rem; }
        .footer-bottom .social-links { display: flex; gap: 16px; }
        .footer-bottom .social-links a { color: var(--text-muted); font-size: 1.1rem; transition: var(--transition); }
        .footer-bottom .social-links a:hover { color: var(--secondary); transform: translateY(-2px); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; gap: 40px; text-align: center; }
            .hero-content .subtitle { margin-left: auto; margin-right: auto; }
            .hero-tags { justify-content: center; }
            .hero-actions { justify-content: center; }
            .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
        }

        @media (max-width: 768px) {
            :root { --nav-height: 64px; }
            .nav-toggle { display: flex; }
            .nav-list {
                position: fixed; top: var(--nav-height); left: 0; right: 0;
                background: rgba(10, 14, 39, 0.98); backdrop-filter: blur(18px);
                flex-direction: column; padding: 16px 24px; gap: 4px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-110%); opacity: 0; pointer-events: none;
                transition: var(--transition);
            }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-list a { width: 100%; padding: 12px 20px; border-radius: var(--radius-sm); }
            .nav-list .nav-cta { margin-top: 8px; justify-content: center; }
            .hero-section { min-height: auto; padding: calc(var(--nav-height) + 32px) 0 60px; }
            .hero-content h1 { font-size: clamp(1.8rem, 7vw, 2.6rem); }
            .hero-glow-ring { width: 240px; height: 240px; }
            .hero-icon-stack i { font-size: 3rem; }
            .section { padding: 60px 0; }
            .section-header { margin-bottom: 40px; }
            .card-grid-4, .card-grid-3 { grid-template-columns: 1fr 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .steps-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .card-grid-4, .card-grid-3, .card-grid-2 { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .steps-grid { grid-template-columns: 1fr; }
            .stat-number { font-size: 1.8rem; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn-primary, .hero-actions .btn-outline { width: 100%; justify-content: center; }
            .rank-item { flex-wrap: wrap; gap: 8px; }
            .faq-question { padding: 14px 16px; font-size: 0.9rem; }
            .faq-answer { padding: 0 16px; font-size: 0.85rem; }
            .faq-item.open .faq-answer { padding: 0 16px 14px; }
            .cta-section { padding: 60px 0; }
            .cta-btn { width: 100%; justify-content: center; }
        }

        /* ===== 实用辅助 ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }