/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #0b1120;
            --clr-primary-light: #141c30;
            --clr-secondary: #1a2a4a;
            --clr-accent: #4a9eff;
            --clr-accent-hover: #6db4ff;
            --clr-gold: #f0c040;
            --clr-gold-dim: #c99a20;
            --clr-red-dot: #e74c3c;
            --clr-bg-body: #070c16;
            --clr-bg-card: #101828;
            --clr-bg-dark: #0a0f1a;
            --clr-bg-section-alt: #0d1522;
            --clr-text: #e8edf5;
            --clr-text-muted: #8899b0;
            --clr-text-dim: #5a6a82;
            --clr-border: #1e2d44;
            --clr-border-light: #2a3c58;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5), 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 40px rgba(74, 158, 255, 0.15);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }

        /* ===== 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--clr-text);
            background: var(--clr-bg-body);
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--clr-accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--clr-accent-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--clr-accent);
            outline-offset: 2px;
            border-radius: 2px;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: #fff;
        }
        h1 {
            font-size: clamp(2.2rem, 6vw, 3.8rem);
        }
        h2 {
            font-size: clamp(1.6rem, 4vw, 2.6rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        p {
            margin-bottom: 1rem;
            color: var(--clr-text-muted);
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--clr-bg-section-alt);
        }
        .section-dark {
            background: var(--clr-bg-dark);
        }
        .section-title {
            text-align: center;
            margin-bottom: 16px;
        }
        .section-subtitle {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px auto;
            color: var(--clr-text-muted);
            font-size: 1.05rem;
        }
        .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--clr-accent), var(--clr-gold));
            border-radius: 4px;
            margin: 12px auto 20px auto;
        }

        /* ===== 按钮系统 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.3px;
        }
        .btn-primary {
            background: var(--clr-accent);
            color: #fff;
            border-color: var(--clr-accent);
        }
        .btn-primary:hover {
            background: var(--clr-accent-hover);
            border-color: var(--clr-accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-outline {
            background: transparent;
            color: var(--clr-accent);
            border-color: var(--clr-accent);
        }
        .btn-outline:hover {
            background: var(--clr-accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-gold {
            background: var(--clr-gold);
            color: #0b1120;
            border-color: var(--clr-gold);
            font-weight: 700;
        }
        .btn-gold:hover {
            background: var(--clr-gold-dim);
            border-color: var(--clr-gold-dim);
            color: #0b1120;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(240, 192, 64, 0.25);
        }
        .btn-lg {
            padding: 18px 44px;
            font-size: 1.1rem;
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: rgba(74, 158, 255, 0.15);
            color: var(--clr-accent);
            border: 1px solid rgba(74, 158, 255, 0.25);
        }
        .badge-gold {
            background: rgba(240, 192, 64, 0.15);
            color: var(--clr-gold);
            border-color: rgba(240, 192, 64, 0.25);
        }
        .badge-red {
            background: rgba(231, 76, 60, 0.15);
            color: var(--clr-red-dot);
            border-color: rgba(231, 76, 60, 0.25);
        }
        .badge .dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            display: inline-block;
        }
        .badge .dot.red {
            background: var(--clr-red-dot);
        }
        .badge .dot.gold {
            background: var(--clr-gold);
        }
        .badge .dot.blue {
            background: var(--clr-accent);
        }

        /* ===== 卡片系统 ===== */
        .card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--clr-border);
            padding: 28px 24px;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
        }
        .card:hover {
            border-color: var(--clr-border-light);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(74, 158, 255, 0.08);
        }
        .card-img {
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            overflow: hidden;
            margin: -28px -24px 20px -24px;
            height: 200px;
            background: var(--clr-secondary);
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.05);
        }
        .card-title {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: #fff;
        }
        .card-text {
            color: var(--clr-text-muted);
            font-size: 0.92rem;
            margin-bottom: 0;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--clr-text-dim);
            margin-top: 12px;
        }
        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 14px;
        }

        /* ===== Header & Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            background: rgba(7, 12, 22, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(30, 45, 68, 0.5);
            z-index: 1000;
            transition: background var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo i {
            color: var(--clr-gold);
            font-size: 1.4rem;
        }
        .logo-badge {
            background: var(--clr-red-dot);
            color: #fff;
            font-size: 0.6rem;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: 50px;
            margin-left: 6px;
            letter-spacing: 0.5px;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.6;
            }
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--clr-text-muted);
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: #fff;
            background: rgba(74, 158, 255, 0.08);
        }
        .nav a.active {
            color: #fff;
            background: rgba(74, 158, 255, 0.12);
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--clr-accent);
            border-radius: 2px;
        }
        .nav-cta {
            background: var(--clr-accent) !important;
            color: #fff !important;
            padding: 8px 22px !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
        }
        .nav-cta:hover {
            background: var(--clr-accent-hover) !important;
            transform: translateY(-1px);
            box-shadow: var(--shadow-glow);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: #fff;
            border-radius: 4px;
            transition: all var(--transition);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding-top: var(--header-h);
            position: relative;
            background: var(--clr-primary);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.5;
            z-index: 1;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(7, 12, 22, 0.92) 0%, rgba(7, 12, 22, 0.7) 50%, rgba(7, 12, 22, 0.88) 100%);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 820px;
            padding: 0 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            border-radius: 50px;
            background: rgba(240, 192, 64, 0.12);
            border: 1px solid rgba(240, 192, 64, 0.2);
            color: var(--clr-gold);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero h1 {
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 40%, var(--clr-gold) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: var(--clr-text-muted);
            max-width: 600px;
            margin: 0 auto 36px auto;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 56px;
            padding-top: 32px;
            border-top: 1px solid rgba(30, 45, 68, 0.4);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat-number span {
            color: var(--clr-accent);
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--clr-text-dim);
            margin-top: 4px;
        }

        /* ===== 核心说明 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-card);
            background: var(--clr-bg-card);
        }
        .intro-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }
        .intro-text h2 {
            margin-bottom: 16px;
        }
        .intro-text p {
            font-size: 1rem;
            margin-bottom: 16px;
        }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 24px;
        }
        .intro-feature {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 16px;
            background: rgba(74, 158, 255, 0.04);
            border-radius: var(--radius-sm);
            border: 1px solid rgba(74, 158, 255, 0.08);
        }
        .intro-feature i {
            color: var(--clr-accent);
            font-size: 1.2rem;
            margin-top: 2px;
        }
        .intro-feature h4 {
            font-size: 0.95rem;
            margin-bottom: 4px;
            color: #fff;
        }
        .intro-feature p {
            font-size: 0.85rem;
            margin-bottom: 0;
            color: var(--clr-text-dim);
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
        }
        .category-card:hover {
            transform: translateY(-6px);
            border-color: var(--clr-border-light);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6), 0 0 30px rgba(74, 158, 255, 0.08);
        }
        .category-card-img {
            height: 180px;
            overflow: hidden;
            background: var(--clr-secondary);
        }
        .category-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .category-card-img img {
            transform: scale(1.05);
        }
        .category-card-body {
            padding: 20px 22px 24px;
        }
        .category-card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .category-card-body p {
            font-size: 0.88rem;
            color: var(--clr-text-dim);
            margin-bottom: 14px;
        }
        .category-card-body .btn {
            padding: 8px 20px;
            font-size: 0.82rem;
        }

        /* ===== 最新资讯 (CMS) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            display: flex;
            flex-direction: column;
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--clr-border);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
        }
        .news-card:hover {
            transform: translateY(-4px);
            border-color: var(--clr-border-light);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
        }
        .news-card-img {
            height: 180px;
            overflow: hidden;
            background: var(--clr-secondary);
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.03);
        }
        .news-card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-body .badge {
            align-self: flex-start;
            margin-bottom: 10px;
        }
        .news-card-body h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            color: #fff;
        }
        .news-card-body h3 a {
            color: inherit;
        }
        .news-card-body h3 a:hover {
            color: var(--clr-accent);
        }
        .news-card-body .card-text {
            font-size: 0.88rem;
            color: var(--clr-text-muted);
            flex: 1;
            margin-bottom: 12px;
        }
        .news-card-body .card-meta {
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid rgba(30, 45, 68, 0.3);
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--clr-text-dim);
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--clr-border);
        }
        .news-empty i {
            font-size: 2.4rem;
            color: var(--clr-text-dim);
            margin-bottom: 16px;
            opacity: 0.5;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
        }
        .stat-card:hover {
            border-color: var(--clr-border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .stat-icon {
            font-size: 2rem;
            color: var(--clr-accent);
            margin-bottom: 12px;
        }
        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-number span {
            color: var(--clr-gold);
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--clr-text-dim);
            margin-top: 6px;
        }

        /* ===== 使用流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 36px 24px 32px;
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--clr-border);
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover {
            border-color: var(--clr-border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--clr-accent), #1a5a9e);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px auto;
            box-shadow: 0 4px 20px rgba(74, 158, 255, 0.25);
        }
        .step-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--clr-text-dim);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--clr-border-light);
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            color: #fff;
            font-size: 1rem;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(74, 158, 255, 0.04);
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--clr-accent);
            font-size: 0.85rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px 24px;
            color: var(--clr-text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0b1120 0%, #141c30 50%, #0b1120 100%);
            border-top: 1px solid rgba(30, 45, 68, 0.4);
            border-bottom: 1px solid rgba(30, 45, 68, 0.4);
        }
        .cta-box {
            text-align: center;
            padding: 64px 24px;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-box h2 {
            margin-bottom: 16px;
        }
        .cta-box p {
            font-size: 1.05rem;
            margin-bottom: 32px;
            color: var(--clr-text-muted);
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--clr-bg-dark);
            border-top: 1px solid rgba(30, 45, 68, 0.3);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(30, 45, 68, 0.2);
        }
        .footer-brand .logo {
            font-size: 1.15rem;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--clr-text-dim);
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            padding: 4px 0;
            font-size: 0.88rem;
            color: var(--clr-text-dim);
        }
        .footer-col a:hover {
            color: var(--clr-accent);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            font-size: 0.82rem;
            color: var(--clr-text-dim);
        }
        .footer-bottom a {
            color: var(--clr-text-dim);
        }
        .footer-bottom a:hover {
            color: var(--clr-accent);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(74, 158, 255, 0.08);
            color: var(--clr-text-muted);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--clr-accent);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 移动端响应式 ===== */
        @media (max-width: 1024px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-image {
                order: -1;
            }
            .intro-image img {
                height: 280px;
            }
            .category-grid {
                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: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .hero {
                min-height: 90vh;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 24px;
            }
            .hero-stat-number {
                font-size: 1.6rem;
            }

            /* 移动端导航 */
            .nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(7, 12, 22, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                border-bottom: 1px solid rgba(30, 45, 68, 0.4);
                transform: translateY(-120%);
                opacity: 0;
                transition: all var(--transition);
                pointer-events: none;
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .nav a.active::after {
                display: none;
            }
            .nav a.active {
                background: rgba(74, 158, 255, 0.12);
            }
            .nav-cta {
                text-align: center;
                margin-top: 8px;
            }
            .nav-toggle {
                display: flex;
            }

            .category-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-card {
                padding: 24px 16px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .intro-features {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 16px;
                text-align: center;
            }
            .cta-box {
                padding: 40px 16px;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 40px 0;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-number {
                font-size: 1.5rem;
            }
            .logo {
                font-size: 1.05rem;
            }
            .logo i {
                font-size: 1.1rem;
            }
            .card {
                padding: 20px 18px;
            }
            .card-img {
                margin: -20px -18px 16px -18px;
                height: 160px;
            }
            .news-card-body {
                padding: 16px 18px 20px;
            }
            .news-card-img {
                height: 140px;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 1rem;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b1a2f;
            --primary-light: #1a3050;
            --primary-dark: #060e1a;
            --accent: #e8a93a;
            --accent-hover: #d4942e;
            --accent-glow: rgba(232, 169, 58, 0.25);
            --bg-dark: #0a0f18;
            --bg-card: #111a28;
            --bg-section: #0d1623;
            --bg-input: #1a2538;
            --text-primary: #f0f4fa;
            --text-secondary: #b0c4de;
            --text-muted: #6a7f9f;
            --border-color: rgba(232, 169, 58, 0.15);
            --border-accent: rgba(232, 169, 58, 0.35);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(232, 169, 58, 0.06);
            --shadow-glow: 0 0 40px rgba(232, 169, 58, 0.08);
            --shadow-btn: 0 4px 20px rgba(232, 169, 58, 0.2);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
        }

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

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

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 头部 / 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(10, 15, 24, 0.88);
            backdrop-filter: blur(20px) saturate(1.2);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition), border-color var(--transition);
        }
        .header.scrolled {
            background: rgba(6, 14, 26, 0.96);
            border-bottom-color: var(--border-accent);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        @media (max-width: 768px) {
            .header-inner {
                padding: 0 16px;
            }
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            transition: opacity var(--transition);
            flex-shrink: 0;
        }
        .logo:hover {
            opacity: 0.88;
            color: var(--text-primary);
        }
        .logo i {
            color: var(--accent);
            font-size: 26px;
            filter: drop-shadow(0 0 8px var(--accent-glow));
        }
        .logo-badge {
            font-size: 11px;
            font-weight: 600;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 2px 10px;
            border-radius: 20px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            line-height: 1.4;
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav a:hover {
            color: var(--text-primary);
            background: rgba(232, 169, 58, 0.06);
        }
        .nav a.active {
            color: var(--accent);
            background: rgba(232, 169, 58, 0.1);
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            box-shadow: 0 0 12px var(--accent-glow);
        }
        .nav a.nav-cta {
            background: var(--accent);
            color: var(--primary-dark);
            padding: 8px 22px;
            border-radius: var(--radius-md);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: var(--shadow-btn);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .nav a.nav-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 28px rgba(232, 169, 58, 0.3);
            color: var(--primary-dark);
        }
        .nav a.nav-cta i {
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: transparent;
            transition: background var(--transition);
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: transform var(--transition), opacity var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(232, 169, 58, 0.08);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        @media (max-width: 820px) {
            .nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(10, 15, 24, 0.97);
                backdrop-filter: blur(24px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 6px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.35s ease, opacity 0.35s ease;
                box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 17px;
                border-radius: var(--radius-sm);
            }
            .nav a.active::after {
                display: none;
            }
            .nav a.nav-cta {
                justify-content: center;
                margin-top: 8px;
                padding: 14px 22px;
            }
            .nav-toggle {
                display: flex;
            }
        }

        /* ===== 分类 Banner ===== */
        .category-banner {
            margin-top: var(--header-height);
            padding: 100px 0 80px;
            background: linear-gradient(165deg, var(--primary-dark) 0%, var(--bg-dark) 40%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .category-banner::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(232, 169, 58, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .category-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .category-banner .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .category-banner .breadcrumb a:hover {
            color: var(--accent);
        }
        .category-banner .breadcrumb .sep {
            color: var(--text-muted);
        }
        .category-banner .breadcrumb .current {
            color: var(--accent);
        }
        .category-banner h1 {
            font-size: clamp(32px, 5vw, 56px);
            font-weight: 800;
            letter-spacing: -0.5px;
            line-height: 1.2;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text-primary) 60%, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-banner .subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .category-banner .meta-tags {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .category-banner .meta-tags .tag {
            background: rgba(232, 169, 58, 0.1);
            border: 1px solid var(--border-accent);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .category-banner .meta-tags .tag i {
            font-size: 12px;
        }

        @media (max-width: 768px) {
            .category-banner {
                padding: 80px 0 56px;
            }
            .category-banner .subtitle {
                font-size: 16px;
            }
            .category-banner .meta-tags .tag {
                font-size: 13px;
                padding: 4px 14px;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-dark {
            background: var(--bg-section);
        }
        .section-card {
            background: var(--bg-card);
        }
        .section-title {
            font-size: clamp(26px, 3.2vw, 38px);
            font-weight: 700;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
            line-height: 1.25;
            color: var(--text-primary);
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 44px;
            line-height: 1.7;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }
        .section-divider {
            width: 50px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            margin: 16px auto 0;
            box-shadow: 0 0 20px var(--accent-glow);
        }
        .section-header .section-divider {
            margin: 12px auto 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-subtitle {
                font-size: 16px;
                margin-bottom: 32px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== 卡片网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: var(--border-accent);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
            transition: transform 0.4s ease;
        }
        .card:hover .card-img {
            transform: scale(1.03);
        }
        .card-body {
            padding: 22px 24px 26px;
        }
        .card-body .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 169, 58, 0.1);
            padding: 2px 12px;
            border-radius: 20px;
            letter-spacing: 0.3px;
            margin-bottom: 10px;
            border: 1px solid var(--border-accent);
        }
        .card-body h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.35;
        }
        .card-body h3 a {
            color: var(--text-primary);
            transition: color var(--transition);
        }
        .card-body h3 a:hover {
            color: var(--accent);
        }
        .card-body p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.65;
            margin-bottom: 14px;
        }
        .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .card-body .card-meta i {
            margin-right: 4px;
            color: var(--accent);
        }
        .card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 500;
            font-size: 14px;
            color: var(--accent);
            transition: gap var(--transition);
        }
        .card-body .card-link:hover {
            gap: 12px;
        }

        @media (max-width: 768px) {
            .card-body {
                padding: 18px 18px 22px;
            }
            .card-body h3 {
                font-size: 17px;
            }
            .card-body p {
                font-size: 14px;
            }
        }

        /* ===== 特色列表项 ===== */
        .feature-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px 32px;
        }
        .feature-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 20px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .feature-item:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-card);
        }
        .feature-item .icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: rgba(232, 169, 58, 0.08);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent);
            border: 1px solid var(--border-accent);
        }
        .feature-item .text h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text-primary);
        }
        .feature-item .text p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .feature-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-item {
                padding: 16px 18px;
            }
        }

        /* ===== 分类入口（子分类网格） ===== */
        .subcat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .subcat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 28px 20px 24px;
            text-align: center;
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
        }
        .subcat-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-accent);
            box-shadow: var(--shadow-card);
        }
        .subcat-card .icon {
            font-size: 32px;
            color: var(--accent);
            margin-bottom: 12px;
            filter: drop-shadow(0 0 12px var(--accent-glow));
        }
        .subcat-card h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .subcat-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .subcat-card .badge {
            display: inline-block;
            margin-top: 10px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(232, 169, 58, 0.08);
            color: var(--accent);
            padding: 2px 14px;
            border-radius: 20px;
            border: 1px solid var(--border-accent);
        }

        @media (max-width: 1024px) {
            .subcat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .subcat-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 数据统计块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: border-color var(--transition), transform var(--transition);
        }
        .stat-item:hover {
            border-color: var(--border-accent);
            transform: translateY(-2px);
        }
        .stat-item .number {
            font-size: 38px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stat-item .label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .number {
                font-size: 30px;
            }
        }
        @media (max-width: 400px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-accent);
        }
        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            background: transparent;
            text-align: left;
            transition: background var(--transition), color var(--transition);
        }
        .faq-question:hover {
            background: rgba(232, 169, 58, 0.04);
        }
        .faq-question .faq-icon {
            font-size: 14px;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 260px;
            padding: 0 24px 20px;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 18px;
                font-size: 15px;
            }
            .faq-answer {
                font-size: 14px;
                padding: 0 18px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: clamp(28px, 3.6vw, 42px);
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .cta-section p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 580px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            border: none;
            cursor: pointer;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: var(--shadow-btn);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(232, 169, 58, 0.3);
            color: var(--primary-dark);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-accent);
        }
        .btn-outline:hover {
            background: rgba(232, 169, 58, 0.08);
            border-color: var(--accent);
            transform: translateY(-2px);
            color: var(--text-primary);
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 14px;
        }

        @media (max-width: 640px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary-dark);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 20px;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 5px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            font-size: 18px;
            color: var(--text-muted);
            transition: color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            color: var(--accent);
            transform: translateY(-2px);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 540px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 功能性 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== 响应式辅助 ===== */
        @media (max-width: 520px) {
            .container {
                padding: 0 12px;
            }
            .category-banner h1 {
                font-size: 26px;
            }
            .category-banner .subtitle {
                font-size: 15px;
            }
            .section-title {
                font-size: 22px;
            }
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--text-muted);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent);
        }

        /* ===== 焦点 ===== */
        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ===== 图片占位优雅降级 ===== */
        img {
            background: var(--bg-input);
        }

/* roulang page: article */
:root {
            --primary: #0a0e17;
            --primary-light: #141c2b;
            --secondary: #f0b90b;
            --secondary-hover: #d4a509;
            --accent: #ff6b00;
            --accent-hover: #e05e00;
            --bg-dark: #050810;
            --bg-card: #0f1724;
            --bg-card-hover: #1a2538;
            --bg-surface: #0d1520;
            --text-primary: #f0f4ff;
            --text-secondary: #b0b8c5;
            --text-muted: #6b7a8f;
            --border-color: #1e2a3a;
            --border-light: #2a3a4e;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.5);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.6);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }
        *, *::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);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary-hover); }
        a:focus-visible { outline: 2px solid var(--secondary); outline-offset: 3px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; color: inherit; }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(5,8,16,0.92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color); height: var(--header-h); transition: var(--transition);
        }
        .header.scrolled { background: rgba(5,8,16,0.98); box-shadow: var(--shadow-md); }
        .header-inner {
            max-width: var(--container-max); margin: 0 auto; padding: 0 24px;
            display: flex; align-items: center; justify-content: space-between; height: 100%;
        }
        .logo {
            display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700;
            color: var(--text-primary); letter-spacing: 0.5px; transition: var(--transition);
        }
        .logo i { color: var(--secondary); font-size: 26px; }
        .logo:hover { color: var(--secondary); }
        .logo-badge {
            font-size: 10px; font-weight: 600; background: var(--secondary); color: var(--primary);
            padding: 2px 10px; border-radius: 20px; letter-spacing: 0.5px; text-transform: uppercase;
            margin-left: 4px;
        }
        .nav { display: flex; align-items: center; gap: 8px; }
        .nav a {
            position: relative; padding: 8px 18px; font-size: 14px; font-weight: 500;
            color: var(--text-secondary); border-radius: var(--radius-sm); transition: var(--transition);
            letter-spacing: 0.3px;
        }
        .nav a:hover { color: var(--text-primary); background: rgba(240,185,11,0.08); }
        .nav a.active { color: var(--secondary); background: rgba(240,185,11,0.12); }
        .nav a.active::after {
            content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
            width: 20px; height: 2px; background: var(--secondary); border-radius: 2px;
        }
        .nav a.nav-cta {
            background: var(--secondary); color: var(--primary); font-weight: 600;
            padding: 8px 22px; border-radius: var(--radius-sm); display: flex; align-items: center; gap: 8px;
        }
        .nav a.nav-cta:hover { background: var(--secondary-hover); color: var(--primary); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(240,185,11,0.3); }
        .nav-toggle {
            display: none; flex-direction: column; gap: 5px; padding: 8px; border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle span { display: block; width: 26px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }
        .nav-toggle:hover span { background: var(--secondary); }
        .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
        .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
        .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

        /* ===== Hero / Banner ===== */
        .article-hero {
            position: relative; margin-top: var(--header-h); min-height: 380px;
            display: flex; align-items: flex-end; padding: 60px 0 50px;
            background: var(--primary) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }
        .article-hero::before {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(180deg, rgba(5,8,16,0.45) 0%, rgba(5,8,16,0.92) 100%);
            z-index: 1;
        }
        .article-hero .container { position: relative; z-index: 2; width: 100%; }
        .article-hero .hero-meta {
            display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin-bottom: 16px;
        }
        .article-hero .hero-category {
            display: inline-block; background: var(--secondary); color: var(--primary);
            font-size: 12px; font-weight: 600; padding: 4px 16px; border-radius: 20px;
            letter-spacing: 0.5px; text-transform: uppercase;
        }
        .article-hero .hero-date {
            font-size: 13px; color: var(--text-secondary); display: flex; align-items: center; gap: 6px;
        }
        .article-hero .hero-date i { color: var(--secondary); }
        .article-hero h1 {
            font-size: 40px; font-weight: 800; line-height: 1.2; color: var(--text-primary);
            max-width: 900px; letter-spacing: -0.5px; margin-bottom: 12px;
        }
        .article-hero .hero-desc {
            font-size: 17px; color: var(--text-secondary); max-width: 720px; line-height: 1.6;
        }

        /* ===== Content Section ===== */
        .content-section { padding: 60px 0 40px; background: var(--bg-dark); }
        .content-layout {
            display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: start;
        }
        .content-main {
            background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-lg);
            padding: 40px 44px; box-shadow: var(--shadow-sm);
        }
        .content-main .article-body {
            font-size: 16.5px; line-height: 1.85; color: var(--text-secondary);
        }
        .content-main .article-body p { margin-bottom: 1.4em; }
        .content-main .article-body h2,
        .content-main .article-body h3,
        .content-main .article-body h4 {
            color: var(--text-primary); margin: 1.6em 0 0.6em; font-weight: 700; letter-spacing: -0.3px;
        }
        .content-main .article-body h2 { font-size: 26px; margin-top: 2em; }
        .content-main .article-body h3 { font-size: 21px; }
        .content-main .article-body h4 { font-size: 18px; }
        .content-main .article-body ul,
        .content-main .article-body ol { margin: 1em 0; padding-left: 1.6em; }
        .content-main .article-body li { margin-bottom: 0.5em; }
        .content-main .article-body a { color: var(--secondary); text-decoration: underline; text-underline-offset: 3px; }
        .content-main .article-body a:hover { color: var(--secondary-hover); }
        .content-main .article-body blockquote {
            border-left: 4px solid var(--secondary); background: rgba(240,185,11,0.06);
            padding: 16px 24px; margin: 1.6em 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary); font-style: italic;
        }
        .content-main .article-body img {
            margin: 1.6em auto; border-radius: var(--radius-md); box-shadow: var(--shadow-md);
            max-width: 100%;
        }
        .content-main .article-body .content-image-wrapper {
            text-align: center; margin: 1.6em 0;
        }
        .content-main .article-body .content-image-wrapper figcaption {
            font-size: 13px; color: var(--text-muted); margin-top: 8px;
        }

        /* Sidebar */
        .content-sidebar { display: flex; flex-direction: column; gap: 28px; }
        .sidebar-card {
            background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-md);
            padding: 24px; box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 16px; font-weight: 700; color: var(--text-primary); margin-bottom: 16px;
            display: flex; align-items: center; gap: 8px;
        }
        .sidebar-card h3 i { color: var(--secondary); font-size: 16px; }
        .sidebar-card .info-row {
            display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--border-color);
            font-size: 14px; color: var(--text-secondary);
        }
        .sidebar-card .info-row:last-child { border-bottom: none; }
        .sidebar-card .info-row .label { color: var(--text-muted); }
        .sidebar-card .info-row .value { color: var(--text-primary); font-weight: 500; }
        .sidebar-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
        .sidebar-tags .tag {
            display: inline-block; background: rgba(240,185,11,0.1); color: var(--secondary);
            font-size: 12px; font-weight: 500; padding: 4px 14px; border-radius: 20px;
            border: 1px solid rgba(240,185,11,0.2); transition: var(--transition);
        }
        .sidebar-tags .tag:hover { background: rgba(240,185,11,0.2); color: var(--secondary-hover); }
        .sidebar-share { display: flex; gap: 10px; margin-top: 8px; }
        .sidebar-share a {
            width: 38px; height: 38px; display: flex; align-items: center; justify-content: center;
            background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 50%;
            color: var(--text-secondary); font-size: 16px; transition: var(--transition);
        }
        .sidebar-share a:hover { background: var(--secondary); color: var(--primary); border-color: var(--secondary); transform: translateY(-2px); }

        /* ===== Recommend Section ===== */
        .recommend-section { padding: 60px 0; background: var(--primary); }
        .recommend-section .section-title {
            font-size: 28px; font-weight: 800; color: var(--text-primary); text-align: center; margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .recommend-section .section-sub {
            text-align: center; color: var(--text-secondary); font-size: 16px; margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto;
        }
        .recommend-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
        }
        .recommend-card {
            background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-md);
            overflow: hidden; transition: var(--transition); box-shadow: var(--shadow-sm);
        }
        .recommend-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--border-light); }
        .recommend-card .card-img {
            width: 100%; height: 180px; object-fit: cover; border-radius: 0; display: block;
        }
        .recommend-card .card-body { padding: 20px 22px 24px; }
        .recommend-card .card-body h4 { font-size: 17px; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
        .recommend-card .card-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
        .recommend-card .card-body .card-link {
            display: inline-flex; align-items: center; gap: 6px; margin-top: 12px;
            font-size: 14px; font-weight: 600; color: var(--secondary); transition: var(--transition);
        }
        .recommend-card .card-body .card-link:hover { color: var(--secondary-hover); gap: 10px; }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 64px 0; background: var(--bg-dark);
            border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color);
        }
        .cta-box {
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
            border: 1px solid var(--border-color); border-radius: var(--radius-xl);
            padding: 52px 48px; text-align: center; box-shadow: var(--shadow-md);
            position: relative; overflow: hidden;
        }
        .cta-box::before {
            content: ''; position: absolute; top: -50%; right: -20%; width: 300px; height: 300px;
            background: radial-gradient(circle, rgba(240,185,11,0.05) 0%, transparent 70%);
            border-radius: 50%; pointer-events: none;
        }
        .cta-box h2 { font-size: 28px; font-weight: 800; color: var(--text-primary); margin-bottom: 12px; }
        .cta-box p { color: var(--text-secondary); font-size: 16px; max-width: 560px; margin: 0 auto 28px; line-height: 1.6; }
        .cta-box .btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
        .cta-box .btn-primary {
            display: inline-flex; align-items: center; gap: 10px; background: var(--secondary); color: var(--primary);
            font-weight: 700; font-size: 15px; padding: 14px 32px; border-radius: var(--radius-sm);
            transition: var(--transition); border: none;
        }
        .cta-box .btn-primary:hover { background: var(--secondary-hover); transform: translateY(-2px); box-shadow: 0 6px 24px rgba(240,185,11,0.3); }
        .cta-box .btn-outline {
            display: inline-flex; align-items: center; gap: 10px; border: 1px solid var(--border-light);
            color: var(--text-secondary); font-weight: 600; font-size: 15px; padding: 14px 32px;
            border-radius: var(--radius-sm); transition: var(--transition); background: transparent;
        }
        .cta-box .btn-outline:hover { border-color: var(--secondary); color: var(--secondary); background: rgba(240,185,11,0.06); }

        /* ===== Error State ===== */
        .error-section {
            padding: 120px 0 80px; min-height: 60vh; display: flex; align-items: center; justify-content: center;
            text-align: center;
        }
        .error-section .error-icon { font-size: 64px; color: var(--secondary); margin-bottom: 20px; opacity: 0.6; }
        .error-section h2 { font-size: 28px; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; }
        .error-section p { color: var(--text-secondary); font-size: 16px; margin-bottom: 24px; }
        .error-section .back-link {
            display: inline-flex; align-items: center; gap: 8px; background: var(--secondary); color: var(--primary);
            font-weight: 600; padding: 12px 28px; border-radius: var(--radius-sm); transition: var(--transition);
        }
        .error-section .back-link:hover { background: var(--secondary-hover); transform: translateY(-2px); }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary); border-top: 1px solid var(--border-color);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px;
            border-bottom: 1px solid var(--border-color);
        }
        .footer-brand .logo { font-size: 20px; margin-bottom: 14px; display: inline-flex; }
        .footer-brand p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; max-width: 320px; }
        .footer-col h4 { font-size: 14px; font-weight: 700; color: var(--text-primary); margin-bottom: 16px; letter-spacing: 0.5px; }
        .footer-col a {
            display: block; font-size: 13px; color: var(--text-secondary); padding: 6px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--secondary); padding-left: 4px; }
        .footer-bottom {
            display: flex; justify-content: space-between; align-items: center;
            padding: 20px 0; flex-wrap: wrap; gap: 12px;
        }
        .footer-bottom span { font-size: 13px; color: var(--text-muted); }
        .footer-bottom a { color: var(--text-secondary); }
        .footer-bottom a:hover { color: var(--secondary); }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 34px; height: 34px; display: flex; align-items: center; justify-content: center;
            border: 1px solid var(--border-color); border-radius: 50%; color: var(--text-secondary);
            font-size: 14px; transition: var(--transition);
        }
        .footer-social a:hover { background: var(--secondary); color: var(--primary); border-color: var(--secondary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .content-layout { grid-template-columns: 1fr; }
            .content-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0;
                background: rgba(5,8,16,0.98); backdrop-filter: blur(16px); flex-direction: column;
                padding: 16px 24px 24px; border-bottom: 1px solid var(--border-color); gap: 6px; }
            .nav.open { display: flex; }
            .nav a { width: 100%; padding: 12px 16px; font-size: 16px; }
            .nav a.nav-cta { justify-content: center; }
            .nav-toggle { display: flex; }
            .article-hero { min-height: 280px; padding: 40px 0 30px; }
            .article-hero h1 { font-size: 28px; }
            .article-hero .hero-desc { font-size: 15px; }
            .content-main { padding: 24px 20px; }
            .content-main .article-body { font-size: 15px; }
            .content-sidebar { grid-template-columns: 1fr; }
            .recommend-grid { grid-template-columns: 1fr 1fr; }
            .cta-box { padding: 36px 24px; }
            .cta-box h2 { font-size: 22px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; align-items: flex-start; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .header-inner { padding: 0 16px; }
            .logo { font-size: 18px; }
            .logo i { font-size: 20px; }
            .logo-badge { font-size: 8px; padding: 1px 8px; }
            .article-hero h1 { font-size: 22px; }
            .article-hero .hero-meta { gap: 8px 12px; }
            .recommend-grid { grid-template-columns: 1fr; }
            .content-main { padding: 18px 14px; border-radius: var(--radius-md); }
            .cta-box { padding: 28px 18px; border-radius: var(--radius-lg); }
            .cta-box .btn-primary,
            .cta-box .btn-outline { width: 100%; justify-content: center; }
            .footer-grid { gap: 20px; }
        }