/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b1a30;
            --primary-light: #1a3a5c;
            --primary-dark: #060f1c;
            --accent: #d4a017;
            --accent-light: #e8b830;
            --accent-dark: #b8860b;
            --bg-dark: #0b1a30;
            --bg-darker: #060f1c;
            --bg-light: #f4f6f9;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --text-dark: #1a2a3a;
            --text-light: #ffffff;
            --text-muted: #6c7a8a;
            --text-accent: #d4a017;
            --border-color: rgba(212, 160, 23, 0.2);
            --border-radius: 12px;
            --border-radius-sm: 8px;
            --border-radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
            --shadow-glow: 0 0 30px rgba(212, 160, 23, 0.12);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --font-size-xs: 0.75rem;
            --font-size-sm: 0.875rem;
            --font-size-base: 1rem;
            --font-size-lg: 1.125rem;
            --font-size-xl: 1.25rem;
            --font-size-2xl: 1.5rem;
            --font-size-3xl: 2rem;
            --font-size-4xl: 2.625rem;
            --font-size-5xl: 3.5rem;
            --space-xs: 0.25rem;
            --space-sm: 0.5rem;
            --space-md: 1rem;
            --space-lg: 1.5rem;
            --space-xl: 2rem;
            --space-2xl: 3rem;
            --space-3xl: 4rem;
            --space-4xl: 6rem;
            --nav-width: 260px;
            --nav-bg: #0a1628;
            --nav-text: #ffffff;
            --nav-active: #d4a017;
            --nav-hover: rgba(212, 160, 23, 0.08);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 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-sans);
            font-size: var(--font-size-base);
            line-height: 1.6;
            color: var(--text-dark);
            background: var(--bg-light);
            display: flex;
            min-height: 100vh;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-dark);
        }
        h1 {
            font-size: var(--font-size-4xl);
        }
        h2 {
            font-size: var(--font-size-3xl);
            margin-bottom: var(--space-lg);
        }
        h3 {
            font-size: var(--font-size-xl);
            margin-bottom: var(--space-sm);
        }
        p {
            margin-bottom: var(--space-md);
            color: var(--text-muted);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--space-xl);
        }
        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 var(--space-xl);
        }
        .section-padding {
            padding: var(--space-4xl) 0;
        }
        .text-center {
            text-align: center;
        }
        .text-accent {
            color: var(--text-accent);
        }
        .text-light {
            color: var(--text-light);
        }
        .text-muted {
            color: var(--text-muted);
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

        /* ===== 左侧导航 ===== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--nav-bg);
            color: var(--nav-text);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition);
            overflow-y: auto;
            border-right: 1px solid rgba(255, 255, 255, 0.04);
        }
        .side-nav .brand {
            padding: var(--space-xl) var(--space-lg);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }
        .side-nav .brand-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary-dark);
            flex-shrink: 0;
        }
        .side-nav .brand-text {
            font-size: var(--font-size-lg);
            font-weight: 700;
            color: var(--text-light);
            line-height: 1.2;
        }
        .side-nav .brand-text small {
            display: block;
            font-size: var(--font-size-xs);
            font-weight: 400;
            color: rgba(255, 255, 255, 0.5);
            letter-spacing: 0.5px;
        }
        .side-nav .nav-list {
            padding: var(--space-lg) 0;
            flex: 1;
        }
        .side-nav .nav-list a {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            padding: var(--space-md) var(--space-lg);
            color: rgba(255, 255, 255, 0.65);
            font-size: var(--font-size-base);
            font-weight: 500;
            transition: all var(--transition);
            border-left: 3px solid transparent;
        }
        .side-nav .nav-list a i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
            opacity: 0.7;
        }
        .side-nav .nav-list a:hover {
            color: var(--text-light);
            background: var(--nav-hover);
            border-left-color: var(--accent);
        }
        .side-nav .nav-list a.active {
            color: var(--nav-active);
            background: var(--nav-hover);
            border-left-color: var(--nav-active);
        }
        .side-nav .nav-list a.active i {
            opacity: 1;
        }
        .side-nav .nav-footer {
            padding: var(--space-lg);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: var(--font-size-xs);
            color: rgba(255, 255, 255, 0.3);
            text-align: center;
        }

        /* ===== 移动端顶部导航 ===== */
        .top-bar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--nav-bg);
            z-index: 999;
            padding: 0 var(--space-lg);
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .top-bar .brand-text-mobile {
            font-size: var(--font-size-lg);
            font-weight: 700;
            color: var(--text-light);
        }
        .top-bar .brand-text-mobile small {
            font-size: var(--font-size-xs);
            color: rgba(255, 255, 255, 0.5);
            margin-left: var(--space-sm);
        }
        .top-bar .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 8px;
            transition: background var(--transition);
        }
        .top-bar .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .top-bar .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-light);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .top-bar .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .top-bar .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .top-bar .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
            background: var(--bg-light);
        }

        /* ===== 导航遮罩 ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
            backdrop-filter: blur(4px);
        }
        .nav-overlay.active {
            display: block;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-darker);
            overflow: hidden;
            padding: var(--space-4xl) 0;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
            opacity: 0.45;
            mix-blend-mode: luminosity;
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% {
                transform: scale(1);
            }
            100% {
                transform: scale(1.08);
            }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 22, 40, 0.88) 0%, rgba(10, 22, 40, 0.60) 50%, rgba(10, 22, 40, 0.85) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            background: rgba(212, 160, 23, 0.12);
            border: 1px solid rgba(212, 160, 23, 0.25);
            color: var(--accent-light);
            padding: var(--space-sm) var(--space-lg);
            border-radius: 50px;
            font-size: var(--font-size-sm);
            font-weight: 500;
            margin-bottom: var(--space-xl);
            backdrop-filter: blur(8px);
        }
        .hero-badge i {
            font-size: 0.9rem;
        }
        .hero h1 {
            font-size: var(--font-size-5xl);
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: var(--space-lg);
            letter-spacing: -1px;
            line-height: 1.1;
        }
        .hero h1 span {
            color: var(--accent);
        }
        .hero p {
            font-size: var(--font-size-lg);
            color: rgba(255, 255, 255, 0.7);
            max-width: 680px;
            margin: 0 auto var(--space-2xl);
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-md);
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: var(--font-size-base);
            transition: all var(--transition);
            border: 2px solid transparent;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(212, 160, 23, 0.3);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-light);
            border-color: rgba(255, 255, 255, 0.3);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-2xl);
            justify-content: center;
            margin-top: var(--space-3xl);
            padding-top: var(--space-2xl);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .num {
            font-size: var(--font-size-3xl);
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
        }
        .hero-stat-item .label {
            font-size: var(--font-size-sm);
            color: rgba(255, 255, 255, 0.5);
            margin-top: var(--space-xs);
        }

        /* ===== 通用板块标题 ===== */
        .section-title {
            text-align: center;
            margin-bottom: var(--space-3xl);
        }
        .section-title h2 {
            margin-bottom: var(--space-sm);
        }
        .section-title .subtitle {
            font-size: var(--font-size-lg);
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title .subtitle-light {
            color: rgba(255, 255, 255, 0.6);
        }

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

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            padding: var(--space-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: all var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: var(--space-md);
            color: var(--accent);
            background: rgba(212, 160, 23, 0.1);
        }
        .card h3 {
            font-size: var(--font-size-lg);
            margin-bottom: var(--space-sm);
        }
        .card p {
            font-size: var(--font-size-sm);
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .card-tag {
            display: inline-block;
            background: rgba(212, 160, 23, 0.08);
            color: var(--text-accent);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: var(--font-size-xs);
            font-weight: 600;
            margin-bottom: var(--space-sm);
        }

        /* ===== 封面卡片（图片） ===== */
        .cover-card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: all var(--transition);
        }
        .cover-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .cover-card .cover-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .cover-card .cover-body {
            padding: var(--space-lg);
        }
        .cover-card .cover-body h3 {
            font-size: var(--font-size-lg);
            margin-bottom: var(--space-xs);
        }
        .cover-card .cover-body p {
            font-size: var(--font-size-sm);
            color: var(--text-muted);
            margin-bottom: var(--space-md);
        }
        .cover-card .cover-link {
            font-weight: 600;
            color: var(--text-accent);
            font-size: var(--font-size-sm);
            display: inline-flex;
            align-items: center;
            gap: var(--space-xs);
        }
        .cover-card .cover-link:hover {
            gap: var(--space-sm);
        }

        /* ===== 资讯列表 ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
        }
        .news-item {
            display: flex;
            align-items: flex-start;
            gap: var(--space-lg);
            background: var(--bg-card);
            padding: var(--space-lg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: all var(--transition);
        }
        .news-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .news-item .news-date {
            flex-shrink: 0;
            width: 60px;
            text-align: center;
            background: rgba(212, 160, 23, 0.08);
            border-radius: 10px;
            padding: var(--space-sm);
        }
        .news-item .news-date .day {
            font-size: var(--font-size-xl);
            font-weight: 700;
            color: var(--text-accent);
            line-height: 1;
        }
        .news-item .news-date .mon {
            font-size: var(--font-size-xs);
            color: var(--text-muted);
            margin-top: 2px;
        }
        .news-item .news-info {
            flex: 1;
            min-width: 0;
        }
        .news-item .news-info .cat {
            font-size: var(--font-size-xs);
            color: var(--text-accent);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .news-item .news-info h3 {
            font-size: var(--font-size-base);
            margin: 4px 0 6px;
            font-weight: 600;
        }
        .news-item .news-info p {
            font-size: var(--font-size-sm);
            color: var(--text-muted);
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            text-align: center;
            padding: var(--space-2xl);
            color: var(--text-muted);
            font-size: var(--font-size-base);
            background: var(--bg-card);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
        }

        /* ===== 数据统计区块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-xl);
        }
        .stat-card {
            text-align: center;
            padding: var(--space-xl);
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--border-radius);
            border: 1px solid rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(8px);
            transition: all var(--transition);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
            border-color: rgba(212, 160, 23, 0.2);
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: var(--space-sm);
        }
        .stat-card .stat-num {
            font-size: var(--font-size-4xl);
            font-weight: 800;
            color: var(--text-light);
            line-height: 1;
        }
        .stat-card .stat-label {
            font-size: var(--font-size-sm);
            color: rgba(255, 255, 255, 0.5);
            margin-top: var(--space-xs);
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-2xl);
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: var(--space-xl);
            background: var(--bg-card);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(0, 0, 0, 0.04);
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-card .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: var(--font-size-xl);
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--space-md);
        }
        .step-card h3 {
            font-size: var(--font-size-lg);
            margin-bottom: var(--space-sm);
        }
        .step-card p {
            font-size: var(--font-size-sm);
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(0, 0, 0, 0.04);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--space-lg) var(--space-xl);
            font-weight: 600;
            font-size: var(--font-size-base);
            color: var(--text-dark);
            background: none;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(212, 160, 23, 0.03);
        }
        .faq-question i {
            color: var(--text-accent);
            transition: transform var(--transition);
            font-size: 0.9rem;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 var(--space-xl);
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 var(--space-xl) var(--space-lg);
        }
        .faq-answer p {
            font-size: var(--font-size-sm);
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') no-repeat center center / cover;
            opacity: 0.12;
            mix-blend-mode: luminosity;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            color: var(--text-light);
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.6);
            max-width: 600px;
            margin: 0 auto var(--space-xl);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-darker);
            color: rgba(255, 255, 255, 0.5);
            padding: var(--space-3xl) 0 var(--space-xl);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--space-2xl);
            margin-bottom: var(--space-2xl);
        }
        .footer-brand .brand-text {
            font-size: var(--font-size-xl);
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: var(--space-sm);
        }
        .footer-brand p {
            font-size: var(--font-size-sm);
            color: rgba(255, 255, 255, 0.4);
            max-width: 320px;
        }
        .footer h4 {
            font-size: var(--font-size-sm);
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: var(--space-md);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .footer a {
            display: block;
            font-size: var(--font-size-sm);
            color: rgba(255, 255, 255, 0.4);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: var(--space-lg);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: var(--space-md);
            font-size: var(--font-size-xs);
            color: rgba(255, 255, 255, 0.3);
        }
        .footer-bottom a {
            display: inline;
            color: rgba(255, 255, 255, 0.3);
            padding: 0;
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 深色板块 ===== */
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-light);
        }
        .section-dark h2 {
            color: var(--text-light);
        }
        .section-dark .subtitle {
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== 背景图片板块 ===== */
        .section-bg-image {
            position: relative;
            background: var(--bg-darker);
        }
        .section-bg-image .bg-img {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') no-repeat center center / cover;
            opacity: 0.12;
            mix-blend-mode: luminosity;
        }
        .section-bg-image .container {
            position: relative;
            z-index: 1;
        }

        /* ===== 标签 ===== */
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: var(--font-size-xs);
            font-weight: 600;
            background: rgba(212, 160, 23, 0.08);
            color: var(--text-accent);
            transition: all var(--transition);
        }
        .tag:hover {
            background: rgba(212, 160, 23, 0.15);
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
            margin: var(--space-md) auto var(--space-lg);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 900px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            :root {
                --font-size-5xl: 2.8rem;
                --font-size-4xl: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            body {
                flex-direction: column;
            }
            .side-nav {
                transform: translateX(-100%);
            }
            .side-nav.open {
                transform: translateX(0);
            }
            .top-bar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 64px;
            }
            .hero {
                min-height: 70vh;
                padding: var(--space-3xl) 0;
            }
            .hero h1 {
                font-size: var(--font-size-3xl);
            }
            .hero p {
                font-size: var(--font-size-base);
            }
            .hero-stats {
                gap: var(--space-xl);
                flex-wrap: wrap;
            }
            .hero-stat-item .num {
                font-size: var(--font-size-2xl);
            }
            .grid-3,
            .grid-2,
            .stats-grid,
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .section-padding {
                padding: var(--space-3xl) 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--space-xl);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .news-item {
                flex-direction: column;
                gap: var(--space-sm);
            }
            .news-item .news-date {
                width: auto;
                display: flex;
                gap: var(--space-sm);
                align-items: center;
                padding: var(--space-xs) var(--space-md);
            }
            .news-item .news-date .day {
                font-size: var(--font-size-base);
            }
            .news-item .news-date .mon {
                font-size: var(--font-size-xs);
                margin-top: 0;
            }
            :root {
                --font-size-5xl: 2.4rem;
                --font-size-4xl: 2rem;
                --font-size-3xl: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 0 var(--space-md);
            }
            :root {
                --font-size-5xl: 2rem;
                --font-size-4xl: 1.6rem;
                --font-size-3xl: 1.4rem;
                --font-size-2xl: 1.2rem;
            }
            .hero h1 {
                font-size: var(--font-size-4xl);
            }
            .stat-card .stat-num {
                font-size: var(--font-size-3xl);
            }
            .cover-card .cover-img {
                height: 160px;
            }
            .faq-question {
                font-size: var(--font-size-sm);
                padding: var(--space-md) var(--space-lg);
            }
            .card {
                padding: var(--space-lg);
            }
            .step-card {
                padding: var(--space-lg);
            }
        }

        /* ===== 滚动条美化 ===== */
        .side-nav::-webkit-scrollbar {
            width: 4px;
        }
        .side-nav::-webkit-scrollbar-track {
            background: transparent;
        }
        .side-nav::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 4px;
        }
        .side-nav::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.25);
        }

        /* ===== 选中高亮 ===== */
        ::selection {
            background: rgba(212, 160, 23, 0.3);
            color: var(--primary-dark);
        }

        /* ===== 焦点可访问性 ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --secondary: #0f3460;
            --accent: #e94560;
            --accent-light: #ff6b81;
            --accent-dark: #c0392b;
            --gold: #f39c12;
            --gold-light: #f1c40f;
            --bg: #f8f9fa;
            --bg-alt: #ffffff;
            --bg-dark: #0d0d1a;
            --text: #2c3e50;
            --text-light: #7f8c8d;
            --text-white: #ecf0f1;
            --border: #e0e0e0;
            --border-light: #f0f0f0;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
            --shadow-glow: 0 0 30px rgba(233,69,96,0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --nav-width: 240px;
            --nav-collapsed: 72px;
            --header-h: 0px;
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --section-gap: 80px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
        }
        a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.2rem; }
        h2 { font-size: 1.8rem; margin-bottom: 1rem; }
        h3 { font-size: 1.35rem; margin-bottom: 0.75rem; }
        h4 { font-size: 1.1rem; margin-bottom: 0.5rem; }
        p { margin-bottom: 1rem; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; width: 100%; }

        /* ===== Side Navigation (Desktop) ===== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: width var(--transition), transform var(--transition);
            overflow: hidden;
            box-shadow: 2px 0 30px rgba(0,0,0,0.3);
        }
        .side-nav .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 24px 20px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            flex-shrink: 0;
        }
        .side-nav .brand-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent), var(--gold));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            flex-shrink: 0;
        }
        .side-nav .brand-text {
            font-size: 1rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            line-height: 1.2;
            color: #fff;
        }
        .side-nav .brand-text small {
            display: block;
            font-size: 0.7rem;
            font-weight: 400;
            opacity: 0.6;
            letter-spacing: 0.3px;
            margin-top: 2px;
        }
        .side-nav .nav-list {
            flex: 1;
            overflow-y: auto;
            padding: 12px 0;
        }
        .side-nav .nav-list a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 20px;
            color: rgba(255,255,255,0.6);
            font-size: 0.92rem;
            font-weight: 500;
            transition: var(--transition);
            border-left: 3px solid transparent;
            text-decoration: none;
        }
        .side-nav .nav-list a i { width: 20px; text-align: center; font-size: 1.05rem; }
        .side-nav .nav-list a:hover {
            color: #fff;
            background: rgba(255,255,255,0.06);
            border-left-color: var(--accent);
        }
        .side-nav .nav-list a.active {
            color: #fff;
            background: rgba(233,69,96,0.15);
            border-left-color: var(--accent);
        }
        .side-nav .nav-footer {
            padding: 16px 20px;
            font-size: 0.75rem;
            color: rgba(255,255,255,0.35);
            border-top: 1px solid rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .side-nav .nav-footer i { color: var(--accent); }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--primary);
            color: #fff;
            z-index: 999;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.2);
        }
        .mobile-header .brand-text {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
        }
        .mobile-header .brand-text small { display: none; }
        .mobile-header .menu-toggle {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.4rem;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
        }
        .mobile-header .menu-toggle:focus { outline: 2px solid var(--accent); }

        /* ===== Main Content Area ===== */
        .main-wrapper {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            transition: margin var(--transition);
        }
        .main-content { flex: 1; padding: 40px 0 60px; }

        /* ===== Article Detail ===== */
        .article-detail {
            background: var(--bg-alt);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 48px 40px;
            margin-bottom: 48px;
        }
        .article-detail .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .article-detail .breadcrumb a { color: var(--text-light); }
        .article-detail .breadcrumb a:hover { color: var(--accent); }
        .article-detail .breadcrumb .sep { color: var(--border); }
        .article-detail .article-header { margin-bottom: 32px; }
        .article-detail .article-header h1 {
            font-size: 2rem;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .article-detail .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            font-size: 0.88rem;
            color: var(--text-light);
            align-items: center;
        }
        .article-detail .article-meta .category {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: #fff;
            font-size: 0.78rem;
            font-weight: 600;
        }
        .article-detail .article-meta .date i,
        .article-detail .article-meta .views i { margin-right: 6px; }
        .article-detail .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-detail .article-body p { margin-bottom: 1.2rem; }
        .article-detail .article-body h2,
        .article-detail .article-body h3 { margin-top: 2rem; color: var(--primary); }
        .article-detail .article-body ul,
        .article-detail .article-body ol { margin-bottom: 1.2rem; padding-left: 1.5rem; }
        .article-detail .article-body ul { list-style: disc; }
        .article-detail .article-body ol { list-style: decimal; }
        .article-detail .article-body li { margin-bottom: 0.4rem; }
        .article-detail .article-body img { margin: 1.5rem 0; border-radius: var(--radius-md); }
        .article-detail .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 20px;
            margin: 1.5rem 0;
            background: var(--bg);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-detail .article-body a { color: var(--accent); text-decoration: underline; }
        .article-detail .article-body a:hover { color: var(--accent-dark); }
        .article-detail .article-footer {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .article-detail .article-footer .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-detail .article-footer .tags span {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            background: var(--bg);
            color: var(--text-light);
            font-size: 0.8rem;
            border: 1px solid var(--border);
        }
        .article-detail .article-footer .share {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .article-detail .article-footer .share a {
            color: var(--text-light);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .article-detail .article-footer .share a:hover { color: var(--accent); }
        .article-detail .not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .article-detail .not-found i { font-size: 3rem; color: var(--text-light); margin-bottom: 20px; }
        .article-detail .not-found h2 { color: var(--text); }
        .article-detail .not-found p { color: var(--text-light); margin-bottom: 24px; }
        .article-detail .not-found .btn {
            display: inline-block;
            padding: 12px 32px;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            transition: var(--transition);
        }
        .article-detail .not-found .btn:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: var(--shadow-glow); }

        /* ===== Related Posts ===== */
        .related-posts {
            margin-top: 48px;
        }
        .related-posts h2 {
            font-size: 1.5rem;
            margin-bottom: 24px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-posts h2 i { color: var(--accent); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-alt);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body { padding: 20px; }
        .related-card .card-body h3 { font-size: 1rem; margin-bottom: 8px; }
        .related-card .card-body h3 a { color: var(--text); }
        .related-card .card-body h3 a:hover { color: var(--accent); }
        .related-card .card-body .meta {
            font-size: 0.8rem;
            color: var(--text-light);
            display: flex;
            gap: 12px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 24px;
            margin-top: auto;
            flex-shrink: 0;
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer .footer-brand .brand-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer .footer-brand p { font-size: 0.88rem; line-height: 1.6; color: rgba(255,255,255,0.5); }
        .footer h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; }
        .footer a {
            display: block;
            color: rgba(255,255,255,0.5);
            font-size: 0.85rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer a:hover { color: var(--accent); padding-left: 4px; }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
            gap: 12px;
        }
        .footer .footer-bottom a { color: rgba(255,255,255,0.45); display: inline; padding: 0; }
        .footer .footer-bottom a:hover { color: var(--accent); padding: 0; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .article-detail { padding: 36px 28px; }
            .article-detail .article-header h1 { font-size: 1.7rem; }
        }

        @media (max-width: 768px) {
            .side-nav { transform: translateX(-100%); width: var(--nav-width); }
            .side-nav.open { transform: translateX(0); }
            .mobile-header { display: flex; }
            .main-wrapper { margin-left: 0; padding-top: 60px; }
            .main-content { padding: 24px 0 40px; }
            .article-detail { padding: 28px 20px; border-radius: var(--radius-md); }
            .article-detail .article-header h1 { font-size: 1.4rem; }
            .article-detail .article-body { font-size: 0.98rem; }
            .footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .related-grid { grid-template-columns: 1fr; }
            .container { padding: 0 16px; }
        }

        @media (max-width: 520px) {
            .article-detail { padding: 20px 16px; }
            .article-detail .article-header h1 { font-size: 1.2rem; }
            .article-detail .article-meta { flex-direction: column; gap: 8px; }
            .article-detail .article-footer { flex-direction: column; align-items: flex-start; }
            .footer .footer-grid { grid-template-columns: 1fr; gap: 20px; }
            .footer .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Overlay for mobile ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.5);
            z-index: 998;
        }
        .nav-overlay.active { display: block; }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --secondary: #0f3460;
            --accent: #e94560;
            --accent-light: #ff6b7f;
            --accent-dark: #c73a4f;
            --bg: #f5f7fc;
            --card-bg: #ffffff;
            --text: #1e1e2f;
            --text-light: #5a5a7a;
            --text-white: #f0f0f5;
            --border: #e0e3ed;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.14);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --nav-width: 260px;
            --header-height: 0px;
            --max-width: 1200px;
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --bg-dark: #12121e;
            --card-dark: #1c1c30;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
            padding-left: var(--nav-width);
            transition: padding-left var(--transition);
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover { color: var(--accent); }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 4px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button { cursor: pointer; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--primary);
        }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; margin-bottom: 1rem; }
        h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }
        h4 { font-size: 1.2rem; margin-bottom: 0.5rem; }
        p { margin-bottom: 1rem; color: var(--text-light); }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            max-width: 600px;
            margin: 12px auto 0;
            font-size: 1.05rem;
        }

        /* ===== 左侧竖向导航 ===== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            padding: 28px 0 20px;
            z-index: 1000;
            overflow-y: auto;
            transition: transform var(--transition), width var(--transition);
            border-right: 1px solid rgba(255, 255, 255, 0.06);
        }
        .side-nav .brand {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 0 24px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 16px;
        }
        .side-nav .brand-icon {
            width: 44px;
            height: 44px;
            background: var(--accent);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: #fff;
            flex-shrink: 0;
        }
        .side-nav .brand-text {
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
        }
        .side-nav .brand-text small {
            display: block;
            font-size: 0.7rem;
            font-weight: 400;
            opacity: 0.7;
            margin-top: 2px;
            letter-spacing: 0.3px;
        }
        .nav-list {
            flex: 1;
            padding: 0 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: 12px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition);
            text-decoration: none;
            position: relative;
        }
        .nav-list a i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }
        .nav-list a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .nav-list a:hover i {
            color: var(--accent-light);
        }
        .nav-list a.active {
            background: rgba(233, 69, 96, 0.2);
            color: #fff;
            font-weight: 600;
        }
        .nav-list a.active i {
            color: var(--accent);
        }
        .nav-list a.active::before {
            content: '';
            position: absolute;
            left: -12px;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: var(--accent);
            border-radius: 0 4px 4px 0;
        }
        .nav-footer {
            padding: 16px 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.75rem;
            opacity: 0.6;
            text-align: center;
            color: var(--text-white);
            margin-top: auto;
        }
        .nav-footer i {
            margin-right: 6px;
            color: var(--accent);
        }

        /* ===== 移动端导航切换 ===== */
        .nav-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 12px;
            width: 48px;
            height: 48px;
            font-size: 1.4rem;
            cursor: pointer;
            box-shadow: 0 4px 16px rgba(0,0,0,0.2);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--secondary);
        }
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0,0,0,0.5);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        /* ===== 主内容区 ===== */
        .main-content {
            flex: 1;
            min-width: 0;
            width: 100%;
            padding: 0;
            transition: all var(--transition);
        }

        /* ===== Banner / 内页首屏 ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-blend-mode: overlay;
            color: #fff;
            text-align: center;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,46,0.85) 0%, rgba(15,52,96,0.75) 100%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner h1 {
            color: #fff;
            font-size: 2.8rem;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .page-banner p {
            color: rgba(255,255,255,0.8);
            font-size: 1.15rem;
            max-width: 680px;
            margin: 0 auto;
            text-shadow: 0 1px 8px rgba(0,0,0,0.2);
        }
        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
        }
        .page-banner .breadcrumb a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
        }
        .page-banner .breadcrumb a:hover {
            color: var(--accent-light);
        }
        .page-banner .breadcrumb span {
            color: var(--accent-light);
            font-weight: 500;
        }

        /* ===== 登录指南区块 ===== */
        .guide-intro {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 48px;
            box-shadow: var(--shadow);
            margin-top: -40px;
            position: relative;
            z-index: 3;
        }
        .guide-intro .text h3 {
            color: var(--primary);
            font-size: 1.6rem;
            margin-bottom: 16px;
        }
        .guide-intro .text p {
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .guide-intro .text .badge-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 20px;
        }
        .guide-intro .text .badge {
            background: var(--bg);
            color: var(--secondary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid var(--border);
        }
        .guide-intro .image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
        }
        .guide-intro .image img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            transition: transform var(--transition);
        }
        .guide-intro .image img:hover {
            transform: scale(1.02);
        }

        /* ===== 登录方式卡片 ===== */
        .methods-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .method-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 32px 24px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
            text-align: center;
        }
        .method-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--accent);
        }
        .method-card .icon {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.8rem;
            color: #fff;
            transition: transform var(--transition);
        }
        .method-card:hover .icon {
            transform: scale(1.08);
        }
        .method-card h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--primary);
        }
        .method-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .method-card .tag {
            display: inline-block;
            margin-top: 12px;
            padding: 4px 14px;
            background: rgba(233, 69, 96, 0.1);
            color: var(--accent);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* ===== 流程步骤 ===== */
        .steps-section {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: #fff;
            padding: 80px 0;
        }
        .steps-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(26,26,46,0.88);
            z-index: 1;
        }
        .steps-section .container {
            position: relative;
            z-index: 2;
        }
        .steps-section .section-title h2 {
            color: #fff;
        }
        .steps-section .section-title h2::after {
            background: var(--accent);
        }
        .steps-section .section-title p {
            color: rgba(255,255,255,0.7);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: rgba(255,255,255,0.06);
            backdrop-filter: blur(8px);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            border: 1px solid rgba(255,255,255,0.1);
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover {
            background: rgba(255,255,255,0.12);
            transform: translateY(-4px);
        }
        .step-card .step-number {
            width: 48px;
            height: 48px;
            background: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            margin: 0 auto 16px;
            box-shadow: 0 4px 20px rgba(233,69,96,0.3);
        }
        .step-card h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .step-card p {
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            margin-bottom: 0;
        }

        /* ===== 安全提示 ===== */
        .security-tips {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }
        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px 20px;
            box-shadow: var(--shadow);
            border-left: 4px solid var(--accent);
            transition: all var(--transition);
        }
        .tip-item:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-hover);
        }
        .tip-item .tip-icon {
            font-size: 1.6rem;
            color: var(--accent);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .tip-item .tip-content h4 {
            font-size: 1rem;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .tip-item .tip-content p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            color: var(--primary);
            font-size: 1.05rem;
            transition: background var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            background: rgba(233, 69, 96, 0.03);
        }
        .faq-question i {
            color: var(--accent);
            transition: transform var(--transition);
            font-size: 1.1rem;
        }
        .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-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            text-align: center;
            padding: 80px 0;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(26,26,46,0.85);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2.4rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.75);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            padding: 16px 40px;
            background: var(--accent);
            color: #fff;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            transition: all var(--transition);
            text-decoration: none;
            box-shadow: 0 8px 30px rgba(233,69,96,0.35);
        }
        .cta-btn:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(233,69,96,0.45);
        }
        .cta-btn i {
            transition: transform var(--transition);
        }
        .cta-btn:hover i {
            transform: translateX(4px);
        }

        /* ===== Footer（沿用首页结构） ===== */
        .footer {
            background: var(--primary);
            color: var(--text-white);
            padding: 60px 0 0;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .brand-text {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-brand p {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            max-width: 320px;
            line-height: 1.7;
        }
        .footer h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer a {
            display: block;
            color: rgba(255,255,255,0.6);
            padding: 4px 0;
            font-size: 0.9rem;
            transition: color var(--transition);
            text-decoration: none;
        }
        .footer a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
            gap: 12px;
        }
        .footer-bottom a {
            color: var(--accent-light);
            display: inline;
            padding: 0;
        }
        .footer-bottom a:hover {
            text-decoration: underline;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            body {
                padding-left: 0;
            }
            .side-nav {
                transform: translateX(-100%);
                width: 280px;
            }
            .side-nav.open {
                transform: translateX(0);
            }
            .nav-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .nav-overlay.active {
                display: block;
            }
            .guide-intro {
                grid-template-columns: 1fr;
                padding: 32px 24px;
                margin-top: -20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .page-banner {
                padding: 60px 0 40px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .guide-intro {
                padding: 24px 16px;
            }
            .guide-intro .image img {
                height: 200px;
            }
            .methods-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .security-tips {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-btn {
                padding: 14px 32px;
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .methods-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .container {
                padding: 0 16px;
            }
            .guide-intro {
                padding: 20px 16px;
            }
            .method-card {
                padding: 24px 16px;
            }
            .step-card {
                padding: 24px 16px;
            }
            .faq-question {
                padding: 16px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.9rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }