/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #E74C3C;
            --color-primary-dark: #C0392B;
            --color-primary-light: #F1948A;
            --color-accent: #F39C12;
            --color-accent-dark: #D68910;
            --color-accent-light: #FDEBD0;
            --color-bg-dark: #0B0E14;
            --color-bg-darker: #07090E;
            --color-bg-card: #131A24;
            --color-bg-section: #0F141C;
            --color-bg-light: #F8F9FA;
            --color-text-white: #FFFFFF;
            --color-text-light: #E8E8E8;
            --color-text-muted: #8899AA;
            --color-text-dark: #1A1A2E;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-light: rgba(255, 255, 255, 0.15);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-btn: 0 4px 20px rgba(231, 76, 60, 0.35);
            --shadow-btn-hover: 0 8px 32px rgba(231, 76, 60, 0.5);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --container-padding: 24px;
            --section-gap: 100px;
            --nav-height: 72px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text-light);
            background: var(--color-bg-dark);
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul {
            list-style: none;
        }

        ::selection {
            background: var(--color-primary);
            color: #fff;
        }

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

        .container-narrow {
            max-width: 880px;
            margin: 0 auto;
            padding: 0 var(--container-padding);
        }

        /* ===== Utility ===== */
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--color-accent);
            background: rgba(243, 156, 18, 0.12);
            padding: 6px 18px;
            border-radius: 50px;
            border: 1px solid rgba(243, 156, 18, 0.2);
            margin-bottom: 16px;
        }

        .section-label i {
            font-size: 0.75rem;
        }

        .section-title {
            font-size: clamp(2rem, 5vw, 3rem);
            font-weight: 800;
            line-height: 1.2;
            color: var(--color-text-white);
            margin-bottom: 16px;
        }

        .section-title .highlight {
            background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-desc {
            font-size: 1.1rem;
            color: var(--color-text-muted);
            max-width: 640px;
            line-height: 1.8;
        }

        .section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .text-center {
            text-align: center;
        }

        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Button ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 50px;
            transition: all var(--transition-smooth);
            border: 2px solid transparent;
            position: relative;
            overflow: hidden;
            letter-spacing: 0.3px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: #fff;
            box-shadow: var(--shadow-btn);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-btn-hover);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-accent {
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
            color: #fff;
            box-shadow: 0 4px 20px rgba(243, 156, 18, 0.35);
        }

        .btn-accent:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(243, 156, 18, 0.5);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--color-border-light);
            color: var(--color-text-white);
        }

        .btn-outline:hover {
            border-color: var(--color-primary);
            background: rgba(231, 76, 60, 0.08);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 10px 22px;
            font-size: 0.875rem;
        }

        .btn-lg {
            padding: 18px 44px;
            font-size: 1.1rem;
        }

        .btn i {
            font-size: 1.1em;
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 50px;
            background: rgba(231, 76, 60, 0.15);
            color: var(--color-primary-light);
            border: 1px solid rgba(231, 76, 60, 0.2);
            letter-spacing: 0.5px;
        }

        .badge-accent {
            background: rgba(243, 156, 18, 0.15);
            color: var(--color-accent);
            border-color: rgba(243, 156, 18, 0.2);
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(11, 14, 20, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--color-border);
            transition: background var(--transition-smooth);
        }

        .header.scrolled {
            background: rgba(11, 14, 20, 0.96);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-padding);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--color-text-white);
            letter-spacing: -0.5px;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 900;
            color: #fff;
            flex-shrink: 0;
        }

        .logo span {
            background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: 50px;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-list a i {
            font-size: 0.85rem;
        }

        .nav-list a:hover {
            color: var(--color-text-white);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-list a.active {
            color: var(--color-text-white);
            background: rgba(231, 76, 60, 0.15);
            border: 1px solid rgba(231, 76, 60, 0.2);
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-cta .btn {
            padding: 10px 24px;
            font-size: 0.85rem;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--color-text-white);
            border-radius: 2px;
            transition: all var(--transition-smooth);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Mobile Nav ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            background: rgba(11, 14, 20, 0.98);
            backdrop-filter: blur(20px);
            padding: 20px var(--container-padding);
            border-bottom: 1px solid var(--color-border);
            z-index: 999;
            transform: translateY(-120%);
            transition: transform var(--transition-smooth);
        }

        .mobile-nav.open {
            transform: translateY(0);
        }

        .mobile-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .mobile-nav a:hover {
            color: var(--color-text-white);
            background: rgba(255, 255, 255, 0.05);
        }

        .mobile-nav a.active {
            color: var(--color-primary);
            background: rgba(231, 76, 60, 0.1);
        }

        .mobile-nav .mobile-cta {
            margin-top: 12px;
            padding: 14px 16px;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding-top: var(--nav-height);
            overflow: hidden;
            background: var(--color-bg-darker);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.4;
            z-index: 0;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg,
                    rgba(11, 14, 20, 0.92) 0%,
                    rgba(11, 14, 20, 0.6) 40%,
                    rgba(231, 76, 60, 0.15) 70%,
                    rgba(11, 14, 20, 0.9) 100%);
            z-index: 1;
        }

        .hero-overlay-glow {
            position: absolute;
            top: -30%;
            right: -10%;
            width: 60%;
            height: 80%;
            background: radial-gradient(ellipse, rgba(231, 76, 60, 0.12), transparent 70%);
            z-index: 1;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            padding: 60px var(--container-padding);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 22px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--color-border-light);
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-bottom: 28px;
            backdrop-filter: blur(8px);
        }

        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #2ECC71;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.6;
                transform: scale(1.3);
            }
        }

        .hero-title {
            font-size: clamp(2.6rem, 8vw, 4.5rem);
            font-weight: 900;
            line-height: 1.05;
            color: var(--color-text-white);
            margin-bottom: 24px;
            letter-spacing: -1px;
        }

        .hero-title .gradient-text {
            background: linear-gradient(135deg, var(--color-accent), var(--color-primary), #E74C3C);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: var(--color-text-muted);
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            margin-bottom: 50px;
        }

        /* ===== Countdown ===== */
        .hero-countdown {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            padding: 24px 32px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(12px);
            max-width: 520px;
            margin: 0 auto;
        }

        .countdown-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            min-width: 70px;
        }

        .countdown-item .num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--color-text-white);
            line-height: 1;
            letter-spacing: -1px;
            background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .countdown-item .label {
            font-size: 0.7rem;
            color: var(--color-text-muted);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-top: 6px;
        }

        .countdown-sep {
            font-size: 2rem;
            font-weight: 300;
            color: var(--color-text-muted);
            align-self: flex-start;
            padding-top: 2px;
        }

        /* ===== Section通用 ===== */
        .section {
            padding: var(--section-gap) 0;
            position: relative;
        }

        .section-bg-dark {
            background: var(--color-bg-section);
        }

        .section-bg-darker {
            background: var(--color-bg-darker);
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Features / 核心说明 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }

        .feature-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-card);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(231, 76, 60, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--color-primary);
            margin-bottom: 20px;
            transition: all var(--transition-smooth);
        }

        .feature-card:hover .feature-icon {
            background: rgba(231, 76, 60, 0.2);
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: 12px;
        }

        .feature-card p {
            color: var(--color-text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== Categories / 分类入口 ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            transition: all var(--transition-smooth);
            aspect-ratio: 4 / 3;
            display: flex;
            align-items: flex-end;
        }

        .category-card:hover {
            transform: translateY(-6px);
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-card);
        }

        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .category-card:hover img {
            transform: scale(1.05);
        }

        .category-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 14, 20, 0.95) 0%, rgba(11, 14, 20, 0.2) 60%, transparent 100%);
            z-index: 1;
        }

        .category-card .info {
            position: relative;
            z-index: 2;
            padding: 28px 24px;
            width: 100%;
        }

        .category-card .info h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: 6px;
        }

        .category-card .info p {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-bottom: 12px;
        }

        .category-card .info .badge {
            background: rgba(231, 76, 60, 0.2);
            color: var(--color-primary-light);
            border-color: rgba(231, 76, 60, 0.3);
            font-size: 0.7rem;
        }

        /* ===== Latest Posts / 最新资讯 ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 28px;
        }

        .post-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }

        .post-card:hover {
            transform: translateY(-6px);
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-card);
        }

        .post-card .thumb {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--color-bg-darker);
        }

        .post-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .post-card:hover .thumb img {
            transform: scale(1.05);
        }

        .post-card .thumb .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(231, 76, 60, 0.9);
            color: #fff;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }

        .post-card .body {
            padding: 24px 22px 22px;
        }

        .post-card .body .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-bottom: 12px;
        }

        .post-card .body .meta i {
            margin-right: 4px;
        }

        .post-card .body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: 10px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-card .body p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-card .body .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 16px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent);
            transition: gap var(--transition-fast);
        }

        .post-card .body .read-more:hover {
            gap: 12px;
        }

        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--color-text-muted);
            background: var(--color-bg-card);
            border: 1px dashed var(--color-border);
            border-radius: var(--radius-lg);
        }

        .empty-posts i {
            font-size: 2.5rem;
            margin-bottom: 16px;
            color: var(--color-border-light);
        }

        /* ===== Stats / 数据 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
        }

        .stat-card {
            text-align: center;
            padding: 36px 20px;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            transition: all var(--transition-smooth);
        }

        .stat-card:hover {
            border-color: var(--color-border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }

        .stat-card .num {
            font-size: 2.8rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
            margin-bottom: 6px;
        }

        .stat-card .label {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* ===== How It Works / 流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 32px;
            counter-reset: step;
        }

        .step-card {
            text-align: center;
            padding: 36px 24px;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            position: relative;
            transition: all var(--transition-smooth);
        }

        .step-card:hover {
            border-color: var(--color-border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }

        .step-card .step-num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin: 0 auto 20px;
            box-shadow: 0 4px 20px rgba(231, 76, 60, 0.3);
        }

        .step-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: 10px;
        }

        .step-card p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--color-border-light);
        }

        .faq-item.open {
            border-color: rgba(231, 76, 60, 0.3);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-light);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
            transition: color var(--transition-fast);
        }

        .faq-question:hover {
            color: var(--color-text-white);
        }

        .faq-question i {
            font-size: 1.2rem;
            color: var(--color-text-muted);
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--color-primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-bg-darker);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 70%;
            height: 200%;
            background: radial-gradient(ellipse, rgba(231, 76, 60, 0.06), transparent 70%);
            pointer-events: none;
        }

        .cta-box {
            position: relative;
            z-index: 1;
            background: linear-gradient(135deg, rgba(231, 76, 60, 0.08), rgba(243, 156, 18, 0.05));
            border: 1px solid rgba(231, 76, 60, 0.15);
            border-radius: var(--radius-xl);
            padding: 60px 40px;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }

        .cta-box h2 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            color: var(--color-text-white);
            margin-bottom: 16px;
        }

        .cta-box p {
            color: var(--color-text-muted);
            font-size: 1.05rem;
            max-width: 520px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .cta-box .btn {
            margin: 0 8px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--color-bg-darker);
            border-top: 1px solid var(--color-border);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            max-width: 320px;
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-text-white);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .footer-col a {
            display: block;
            padding: 6px 0;
            font-size: 0.88rem;
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--color-primary-light);
        }

        .footer-col a i {
            margin-right: 8px;
            font-size: 0.8rem;
        }

        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .footer-bottom p {
            font-size: 0.82rem;
            color: var(--color-text-muted);
        }

        .footer-bottom .socials {
            display: flex;
            gap: 12px;
        }

        .footer-bottom .socials a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
        }

        .footer-bottom .socials a:hover {
            background: rgba(231, 76, 60, 0.15);
            border-color: rgba(231, 76, 60, 0.3);
            color: var(--color-primary);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .hero-title {
                font-size: clamp(2.2rem, 7vw, 3.5rem);
            }
        }

        @media (max-width: 768px) {
            :root {
                --container-padding: 20px;
                --section-gap: 60px;
            }

            .nav-list {
                display: none;
            }

            .nav-cta .btn-desktop {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .mobile-nav {
                display: block;
            }

            .hero {
                min-height: auto;
                padding: 100px 0 60px;
            }

            .hero-countdown {
                padding: 18px 20px;
                gap: 12px;
            }

            .countdown-item {
                min-width: 55px;
            }

            .countdown-item .num {
                font-size: 1.8rem;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }

            .categories-grid {
                grid-template-columns: 1fr 1fr;
            }

            .posts-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }

            .steps-grid {
                grid-template-columns: 1fr;
            }

            .cta-box {
                padding: 40px 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .section-title {
                font-size: clamp(1.6rem, 4vw, 2.2rem);
            }

            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            :root {
                --container-padding: 16px;
                --section-gap: 48px;
            }

            .categories-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: 1fr;
            }

            .hero-title {
                font-size: clamp(1.8rem, 6vw, 2.4rem);
            }

            .hero-countdown {
                gap: 8px;
                padding: 14px 12px;
            }

            .countdown-item {
                min-width: 45px;
            }

            .countdown-item .num {
                font-size: 1.4rem;
            }

            .countdown-item .label {
                font-size: 0.6rem;
            }

            .countdown-sep {
                font-size: 1.4rem;
            }

            .cta-box .btn {
                width: 100%;
                justify-content: center;
                margin: 6px 0;
            }

            .post-card .body {
                padding: 18px 16px 16px;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }

        .animate-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-delay-3 {
            animation-delay: 0.3s;
        }
        .animate-delay-4 {
            animation-delay: 0.4s;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--color-bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.12);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.2);
        }

        /* ===== Focus ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #e6344a;
            --primary-dark: #c91d32;
            --primary-light: #f05a6e;
            --secondary: #f7c948;
            --secondary-dark: #e5b230;
            --accent: #2d9cdb;
            --bg-dark: #0b0e1a;
            --bg-darker: #070913;
            --bg-card: #11162a;
            --bg-card-hover: #1a2040;
            --bg-body: #0b0e1a;
            --text-white: #ffffff;
            --text-light: #f0f0f5;
            --text-muted: #9aa0b8;
            --text-muted-dark: #6b7190;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.18);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.6);
            --shadow-glow: 0 0 40px rgba(230, 52, 74, 0.15);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-light);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        a:focus-visible { outline: 2px solid var(--secondary); outline-offset: 3px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text-white); font-weight: 700; }
        ::selection { background: var(--primary); color: #fff; }
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg-darker); }
        ::-webkit-scrollbar-thumb { background: var(--primary-dark); border-radius: 6px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--primary); }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Header / Nav (品牌活动导航) ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 14, 26, 0.92);
            backdrop-filter: blur(18px) saturate(1.3);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-height);
            transition: var(--transition);
        }
        .header.scrolled { box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5); }
        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        @media (max-width: 768px) { .header-inner { padding: 0 16px; } }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-white);
            font-weight: 800;
            font-size: 1.35rem;
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .logo:hover { color: var(--secondary); }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.3rem;
            color: #fff;
            box-shadow: 0 4px 14px rgba(230, 52, 74, 0.35);
        }
        .logo span { font-size: 1.2rem; }
        @media (max-width: 520px) { .logo span { font-size: 1rem; } .logo-icon { width: 32px; height: 32px; font-size: 1rem; } }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: 100px;
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.92rem;
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-list a i { margin-right: 6px; font-size: 0.85rem; }
        .nav-list a:hover { color: var(--text-white); background: rgba(255, 255, 255, 0.06); }
        .nav-list a.active {
            color: var(--text-white);
            background: var(--primary);
            box-shadow: 0 4px 20px rgba(230, 52, 74, 0.3);
        }
        .nav-list a.active:hover { background: var(--primary-dark); }
        @media (max-width: 768px) {
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                flex-direction: column;
                background: rgba(11, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                padding: 20px 16px 30px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
                z-index: 999;
            }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-list a { width: 100%; text-align: center; padding: 12px 18px; font-size: 1rem; }
        }

        .nav-cta { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
        .btn-desktop { display: inline-flex; }
        @media (max-width: 768px) { .btn-desktop { display: none; } }

        /* ===== Hamburger ===== */
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 36px;
            height: 36px;
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            cursor: pointer;
            padding: 6px;
            transition: var(--transition);
        }
        .hamburger:hover { border-color: var(--border-hover); background: rgba(255,255,255,0.04); }
        .hamburger span {
            display: block;
            height: 2px;
            background: var(--text-light);
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
        @media (max-width: 768px) { .hamburger { display: flex; } }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 30px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            line-height: 1.3;
            white-space: nowrap;
        }
        .btn:focus-visible { outline: 2px solid var(--secondary); outline-offset: 3px; }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 20px rgba(230, 52, 74, 0.3);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(230, 52, 74, 0.45); color: #fff; }
        .btn-primary:active { transform: translateY(0); }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-white);
            border: 1px solid var(--border-color);
        }
        .btn-secondary:hover { background: rgba(255, 255, 255, 0.14); color: var(--text-white); transform: translateY(-2px); }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }
        .btn-lg { padding: 16px 40px; font-size: 1.1rem; }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary-light);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 12px 0;
            font-size: 0.88rem;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            align-items: center;
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--primary-light); }
        .breadcrumb .sep { color: var(--text-muted-dark); margin: 0 4px; }
        .breadcrumb .current { color: var(--text-light); font-weight: 500; }

        /* ===== Article Banner ===== */
        .article-banner {
            padding: 120px 0 60px;
            background: linear-gradient(160deg, var(--bg-darker) 0%, var(--bg-dark) 60%, #0f142a 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }
        .article-banner::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(230, 52, 74, 0.12), transparent 70%);
            pointer-events: none;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(45, 156, 219, 0.08), transparent 70%);
            pointer-events: none;
        }
        .article-banner .container { position: relative; z-index: 2; }
        .article-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(230, 52, 74, 0.18);
            color: var(--primary-light);
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 16px;
            border: 1px solid rgba(230, 52, 74, 0.2);
        }
        .article-badge i { font-size: 0.7rem; }
        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-white);
            max-width: 900px;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-meta i { color: var(--primary-light); font-size: 0.8rem; }
        .article-meta .divider { width: 1px; height: 18px; background: var(--border-color); }
        @media (max-width: 768px) {
            .article-banner { padding: 100px 0 40px; }
            .article-banner h1 { font-size: 1.7rem; }
            .article-meta { gap: 12px; font-size: 0.82rem; }
            .article-meta .divider { display: none; }
        }
        @media (max-width: 520px) {
            .article-banner h1 { font-size: 1.4rem; }
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 50px 0 70px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 50px;
        }
        @media (max-width: 1024px) { .article-layout { grid-template-columns: 1fr; gap: 40px; } }

        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 40px 44px;
            min-height: 300px;
        }
        .article-body p {
            margin-bottom: 1.4em;
            color: var(--text-light);
            line-height: 1.85;
            font-size: 1.02rem;
        }
        .article-body h2 {
            font-size: 1.6rem;
            margin: 1.8em 0 0.6em;
            color: var(--text-white);
            border-left: 4px solid var(--primary);
            padding-left: 16px;
        }
        .article-body h3 {
            font-size: 1.25rem;
            margin: 1.6em 0 0.5em;
            color: var(--text-white);
        }
        .article-body ul, .article-body ol {
            margin: 1em 0 1.4em;
            padding-left: 24px;
            color: var(--text-light);
        }
        .article-body ul li { list-style: disc; margin-bottom: 6px; }
        .article-body ol li { list-style: decimal; margin-bottom: 6px; }
        .article-body a { color: var(--secondary); text-decoration: underline; }
        .article-body a:hover { color: var(--primary-light); }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            margin: 1.5em 0;
            background: rgba(230, 52, 74, 0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 1.8em 0;
            width: 100%;
            box-shadow: var(--shadow-md);
        }
        .article-body .article-image-caption {
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted-dark);
            margin-top: -1.2em;
            margin-bottom: 2em;
        }
        @media (max-width: 768px) {
            .article-body { padding: 24px 20px; }
            .article-body p { font-size: 0.96rem; }
            .article-body h2 { font-size: 1.3rem; }
            .article-body h3 { font-size: 1.1rem; }
        }

        /* ===== Article Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 24px 26px;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-white);
        }
        .sidebar-card h3 i { color: var(--primary-light); }
        .sidebar-list { display: flex; flex-direction: column; gap: 10px; }
        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,0.02);
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .sidebar-list a:hover { background: rgba(255,255,255,0.06); color: var(--text-light); transform: translateX(4px); }
        .sidebar-list a i { color: var(--primary-light); font-size: 0.75rem; }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            padding: 4px 14px;
            border-radius: 100px;
            background: rgba(255,255,255,0.05);
            border: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 0.8rem;
            transition: var(--transition);
        }
        .sidebar-tags a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
        .sidebar-cta {
            text-align: center;
            padding: 30px 20px;
        }
        .sidebar-cta .cta-icon {
            font-size: 2.2rem;
            color: var(--primary-light);
            margin-bottom: 12px;
        }
        .sidebar-cta h4 { font-size: 1.05rem; margin-bottom: 6px; }
        .sidebar-cta p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 16px; }
        @media (max-width: 1024px) {
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        }
        @media (max-width: 640px) { .article-sidebar { grid-template-columns: 1fr; } }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }
        .not-found-box .nf-icon {
            font-size: 4rem;
            color: var(--text-muted-dark);
            margin-bottom: 20px;
        }
        .not-found-box h2 { font-size: 1.6rem; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-muted); margin-bottom: 24px; font-size: 1.05rem; }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 50px 0 70px;
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
        }
        .related-section h2 {
            font-size: 1.6rem;
            margin-bottom: 30px;
            text-align: center;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 900px) { .related-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 560px) { .related-grid { grid-template-columns: 1fr; } }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); border-color: var(--border-hover); }
        .related-card img { width: 100%; height: 180px; object-fit: cover; }
        .related-card .card-body { padding: 18px 20px; }
        .related-card .card-body h4 { font-size: 1rem; margin-bottom: 8px; }
        .related-card .card-body h4 a { color: var(--text-white); }
        .related-card .card-body h4 a:hover { color: var(--primary-light); }
        .related-card .card-body .meta { font-size: 0.8rem; color: var(--text-muted-dark); display: flex; gap: 12px; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        @media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; } }
        @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } }
        .footer-brand .logo { margin-bottom: 14px; }
        .footer-brand p { font-size: 0.88rem; color: var(--text-muted); max-width: 360px; line-height: 1.7; }
        .footer-col h4 {
            font-size: 0.95rem;
            color: var(--text-white);
            margin-bottom: 16px;
            font-weight: 700;
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            color: var(--text-muted);
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .footer-col a i { font-size: 0.6rem; margin-right: 6px; color: var(--text-muted-dark); transition: var(--transition); }
        .footer-col a:hover { color: var(--primary-light); transform: translateX(4px); }
        .footer-col a:hover i { color: var(--primary-light); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 30px;
            border-top: 1px solid var(--border-color);
            font-size: 0.84rem;
            color: var(--text-muted-dark);
        }
        .socials {
            display: flex;
            gap: 12px;
        }
        .socials a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.05);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition);
        }
        .socials a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }
        @media (max-width: 640px) { .footer-bottom { flex-direction: column; text-align: center; } }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .section-title {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-sub {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 40px;
            text-align: center;
        }
        @media (max-width: 640px) { .section-title { font-size: 1.4rem; } }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            border: none;
            cursor: pointer;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            z-index: 999;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            pointer-events: none;
            transform: translateY(20px);
        }
        .back-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
        .back-top:hover { background: var(--primary-dark); transform: translateY(-4px); box-shadow: var(--shadow-glow); }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b7a;
            --secondary: #457b9d;
            --secondary-dark: #1d3557;
            --accent: #f4a261;
            --accent-light: #f8c291;
            --bg: #0d1b2a;
            --bg-alt: #1b2838;
            --bg-card: #1e2d3d;
            --bg-card-hover: #243447;
            --text: #f1faee;
            --text-muted: #a8b2c1;
            --text-dim: #6c7a8a;
            --border: #2a3a4a;
            --border-light: #3a4a5a;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.2);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: 880px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 头部 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(13, 27, 42, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            height: var(--header-h);
            transition: var(--transition);
        }
        .header.scrolled {
            background: rgba(13, 27, 42, 0.98);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text);
            flex-shrink: 0;
        }
        .logo .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 900;
            color: #fff;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.4);
        }
        .logo span {
            background: linear-gradient(135deg, var(--text), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--text-muted);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
            position: relative;
        }
        .nav-list a i {
            font-size: 0.85rem;
        }
        .nav-list a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-list a.active {
            color: var(--text);
            background: rgba(230, 57, 70, 0.15);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .btn-desktop {
            display: inline-flex;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: none;
            border: none;
        }
        .hamburger span {
            width: 26px;
            height: 2.5px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            white-space: nowrap;
            text-align: center;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.5);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.08);
            color: var(--text);
            border: 1px solid var(--border);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.14);
            border-color: var(--border-light);
            transform: translateY(-2px);
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent), #e76f51);
            color: #fff;
            box-shadow: 0 4px 16px rgba(244, 162, 97, 0.35);
        }
        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(244, 162, 97, 0.5);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary-light);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 页面主体 ===== */
        .main {
            padding-top: var(--header-h);
        }

        /* ===== 分类横幅 ===== */
        .category-banner {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, rgba(13, 27, 42, 0.92), rgba(27, 40, 56, 0.88)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(230, 57, 70, 0.12), transparent 60%);
            pointer-events: none;
        }
        .category-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-banner .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .category-banner .breadcrumb a {
            color: var(--text-muted);
        }
        .category-banner .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .category-banner .breadcrumb .sep {
            color: var(--text-dim);
        }
        .category-banner .breadcrumb .current {
            color: var(--text);
        }
        .category-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-banner p {
            max-width: 680px;
            margin: 0 auto 28px;
            font-size: 1.1rem;
            color: var(--text-muted);
            line-height: 1.8;
        }
        .category-banner .banner-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .category-banner .banner-tags .tag {
            padding: 6px 16px;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--border);
            font-size: 0.82rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .category-banner .banner-tags .tag:hover {
            background: rgba(230, 57, 70, 0.15);
            border-color: var(--primary);
            color: var(--text);
        }
        .category-banner .banner-tags .tag i {
            margin-right: 4px;
            color: var(--primary-light);
        }
        .category-banner .banner-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 36px;
        }
        .category-banner .banner-stats .stat {
            text-align: center;
        }
        .category-banner .banner-stats .stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            display: block;
            line-height: 1.2;
        }
        .category-banner .banner-stats .stat .num span {
            color: var(--primary-light);
        }
        .category-banner .banner-stats .stat .label {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .section-header h2 i {
            color: var(--primary-light);
            margin-right: 8px;
        }
        .section-header p {
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-muted);
            font-size: 1rem;
        }
        .section-header .subtitle {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(230, 57, 70, 0.12);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--primary-light);
            margin-bottom: 12px;
            letter-spacing: 1px;
            font-weight: 500;
        }

        /* ===== 攻略分类卡片 ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
            cursor: pointer;
        }
        .guide-card:hover {
            transform: translateY(-6px);
            border-color: var(--primary);
            box-shadow: 0 12px 40px rgba(230, 57, 70, 0.15);
            background: var(--bg-card-hover);
        }
        .guide-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: var(--transition);
        }
        .guide-card:hover .card-img {
            transform: scale(1.03);
        }
        .guide-card .card-body {
            padding: 24px;
        }
        .guide-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .guide-card .card-body h3 i {
            color: var(--primary-light);
            font-size: 1rem;
        }
        .guide-card .card-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .guide-card .card-body .meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--border);
            font-size: 0.8rem;
            color: var(--text-dim);
        }
        .guide-card .card-body .meta .badge {
            padding: 2px 12px;
            border-radius: 12px;
            background: rgba(230, 57, 70, 0.12);
            color: var(--primary-light);
            font-size: 0.75rem;
            font-weight: 500;
        }

        /* ===== 热门攻略列表 ===== */
        .hot-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .hot-item {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
            align-items: flex-start;
        }
        .hot-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-light);
            transform: translateX(4px);
        }
        .hot-item .thumb {
            width: 80px;
            height: 80px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }
        .hot-item .info {
            flex: 1;
            min-width: 0;
        }
        .hot-item .info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .hot-item .info h4 a:hover {
            color: var(--primary-light);
        }
        .hot-item .info .desc {
            font-size: 0.82rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
        }
        .hot-item .info .meta-line {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.75rem;
            color: var(--text-dim);
        }
        .hot-item .info .meta-line i {
            margin-right: 3px;
        }
        .hot-item .info .meta-line .hot-badge {
            color: var(--accent);
        }

        /* ===== 技巧步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.3);
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-item .faq-q {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 0.98rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: var(--transition);
            user-select: none;
        }
        .faq-item .faq-q:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-item .faq-q i {
            color: var(--primary-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-q i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            padding: 0 24px 18px;
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-a {
            display: block;
        }
        .faq-item .faq-a a {
            color: var(--primary-light);
            text-decoration: underline;
        }
        .faq-item .faq-a a:hover {
            color: var(--accent);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(13, 27, 42, 0.95), rgba(27, 40, 56, 0.9)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section h2 span {
            color: var(--primary-light);
        }
        .cta-section p {
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
            color: var(--text-muted);
        }
        .cta-section .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-alt);
            border-top: 1px solid var(--border);
            padding: 60px 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);
        }
        .footer-brand .logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 0.88rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-col a i {
            margin-right: 6px;
            font-size: 0.7rem;
            color: var(--text-dim);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 0.82rem;
            color: var(--text-dim);
        }
        .socials {
            display: flex;
            gap: 14px;
        }
        .socials a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .socials a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== 移动端菜单 ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(13, 27, 42, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px;
            z-index: 999;
            flex-direction: column;
            gap: 6px;
            box-shadow: var(--shadow-lg);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .mobile-menu a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text);
        }
        .mobile-menu a.active {
            color: var(--text);
            background: rgba(230, 57, 70, 0.15);
        }
        .mobile-menu a i {
            width: 20px;
            text-align: center;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
            }
            .btn-desktop {
                display: none !important;
            }
            .hamburger {
                display: flex;
            }
            .category-banner {
                padding: 80px 0 60px;
            }
            .category-banner h1 {
                font-size: 1.8rem;
            }
            .category-banner .banner-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
            .category-banner .banner-stats .stat .num {
                font-size: 1.6rem;
            }
            .section {
                padding: 60px 0;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .hot-list {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .steps-grid .step-card {
                padding: 24px 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .category-banner p {
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .category-banner {
                padding: 64px 0 48px;
            }
            .category-banner h1 {
                font-size: 1.5rem;
            }
            .category-banner .banner-stats {
                gap: 16px;
            }
            .category-banner .banner-stats .stat .num {
                font-size: 1.3rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 1.35rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .hot-item {
                flex-direction: column;
            }
            .hot-item .thumb {
                width: 100%;
                height: 140px;
            }
            .faq-item .faq-q {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-item .faq-a {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }
            .cta-section {
                padding: 60px 0;
            }
            .cta-section h2 {
                font-size: 1.35rem;
            }
            .btn-lg {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
            .footer {
                padding: 40px 0 0;
            }
        }

        /* ===== 辅助 ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--text), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .text-primary-light {
            color: var(--primary-light);
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .mt-12 {
            margin-top: 12px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-12 {
            margin-bottom: 12px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .text-center {
            text-align: center;
        }
        .d-none {
            display: none;
        }
        @media (min-width: 769px) {
            .d-md-block {
                display: block !important;
            }
            .d-md-none {
                display: none !important;
            }
        }