/* roulang page: index */
:root {
            --primary-blue: #1A5B8C;
            --primary-blue-dark: #13476E;
            --primary-blue-light: #E9F0F7;
            --primary-blue-lighter: #F0F5FB;
            --accent-gold: #C69C6D;
            --accent-gold-dark: #B3874B;
            --accent-gold-light: #F5EDE3;
            --bg-warm: #F5F7FA;
            --bg-white: #FFFFFF;
            --text-dark: #1E1E1E;
            --text-mid: #5F6B7A;
            --text-light: #B0B8C4;
            --text-white: #FFFFFF;
            --shadow-xs: 0 2px 6px rgba(0,0,0,0.03);
            --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.07);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.10);
            --shadow-xl: 0 24px 64px rgba(0,0,0,0.14);
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius: 8px;
            --radius-md: 10px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --transition-fast: 0.15s ease;
            --transition: 0.2s ease;
            --transition-slow: 0.3s ease;
            --max-width: 1200px;
            --nav-height: 72px;
            --steps-bar-height: 56px;
            --font-xl: 54px;
            --font-lg: 32px;
            --font-md: 24px;
            --font-base: 16px;
            --font-sm: 14px;
            --font-xs: 12px;
            --letter-spacing-title: -0.5px;
            --line-height-body: 1.8;
            --line-height-heading: 1.2;
        }

        *,
        *::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: 'PingFang SC', 'Microsoft YaHei', 'Heiti SC', 'Noto Sans SC', sans-serif;
            font-size: var(--font-base);
            line-height: var(--line-height-body);
            color: var(--text-dark);
            background-color: var(--bg-warm);
            min-height: 100vh;
            padding-top: calc(var(--nav-height) + var(--steps-bar-height));
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        input,
        textarea,
        select {
            font-family: inherit;
            font-size: var(--font-base);
            outline: none;
            border: 1px solid #D1D9E0;
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            width: 100%;
            transition: border-color var(--transition), box-shadow var(--transition);
            background: var(--bg-white);
            color: var(--text-dark);
        }

        input:focus,
        textarea:focus,
        select:focus {
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(26,91,140,0.08);
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== 导航栏 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--bg-white);
            border-bottom: 1px solid rgba(0,0,0,0.06);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--primary-blue);
            letter-spacing: var(--letter-spacing-title);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent-gold) 0%, #D4A76A 100%);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-menu a {
            font-size: 15px;
            color: var(--text-dark);
            font-weight: 500;
            position: relative;
            padding: 4px 0;
            white-space: nowrap;
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-gold);
            border-radius: 1px;
            transition: width var(--transition);
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--accent-gold);
        }

        .nav-menu a:hover::after,
        .nav-menu a.active::after {
            width: 100%;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-gold);
            color: #fff;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
            transition: background var(--transition), transform var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-cta:hover {
            background: var(--accent-gold-dark);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            z-index: 1001;
        }

        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: all var(--transition);
        }

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

        /* ========== 进度步骤导航 ========== */
        .steps-bar {
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            z-index: 999;
            background: var(--primary-blue-light);
            border-bottom: 1px solid rgba(26,91,140,0.08);
            height: var(--steps-bar-height);
            display: flex;
            align-items: center;
        }

        .steps-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 8px;
        }

        .step-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-mid);
            white-space: nowrap;
            cursor: pointer;
            transition: color var(--transition);
            position: relative;
            flex: 1;
            justify-content: center;
            text-decoration: none;
        }

        .step-item:hover {
            color: var(--primary-blue);
        }

        .step-num {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: var(--bg-white);
            border: 2px solid #D1D9E0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 13px;
            flex-shrink: 0;
            transition: all var(--transition);
            color: var(--text-mid);
        }

        .step-item.highlight .step-num {
            background: var(--accent-gold);
            border-color: var(--accent-gold);
            color: #fff;
        }

        .step-item.highlight {
            color: var(--primary-blue);
            font-weight: 600;
        }

        .step-connector {
            flex: 0 0 40px;
            height: 1.5px;
            background: #D1D9E0;
            border-radius: 1px;
            max-width: 60px;
        }

        /* ========== Hero 白皮书获客 ========== */
        .hero-section {
            background: linear-gradient(170deg, #F0F5FB 0%, #F8FAFC 30%, #FFFFFF 70%, #F5F7FA 100%);
            padding: 60px 0 70px;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -180px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(198,156,109,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -120px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(26,91,140,0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1.2fr;
            gap: 32px;
            align-items: stretch;
            position: relative;
            z-index: 1;
        }

        .hero-cover-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            aspect-ratio: 3/4;
            max-height: 480px;
            position: relative;
        }

        .hero-cover-img {
            flex: 1;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            position: relative;
            min-height: 260px;
        }

        .hero-cover-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(26,91,140,0.55) 0%, rgba(26,91,140,0.10) 50%, transparent 100%);
        }

        .hero-cover-label {
            position: absolute;
            bottom: 16px;
            left: 16px;
            right: 16px;
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            z-index: 2;
            text-shadow: 0 1px 3px rgba(0,0,0,0.3);
            letter-spacing: var(--letter-spacing-title);
        }

        .hero-cover-footer {
            padding: 16px 20px;
            background: var(--bg-white);
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-mid);
            border-top: 1px solid #f0f0f0;
        }

        .hero-cover-footer .badge {
            background: var(--accent-gold-light);
            color: var(--accent-gold-dark);
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
        }

        .hero-toc {
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 16px;
        }

        .hero-toc h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: var(--line-height-heading);
            letter-spacing: var(--letter-spacing-title);
            margin-bottom: 4px;
        }

        .hero-toc h1 .highlight {
            color: var(--accent-gold);
        }

        .hero-toc .subtitle {
            font-size: 16px;
            color: var(--text-mid);
            line-height: 1.6;
            margin-bottom: 8px;
        }

        .hero-toc-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .hero-toc-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-dark);
            line-height: 1.5;
        }

        .hero-toc-item .toc-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-blue-light);
            color: var(--primary-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 1px;
        }

        .hero-form-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            padding: 28px 24px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            border: 1px solid rgba(198,156,109,0.2);
        }

        .hero-form-card .form-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            text-align: center;
            letter-spacing: var(--letter-spacing-title);
        }

        .hero-form-card .form-subtitle {
            font-size: 13px;
            color: var(--text-mid);
            text-align: center;
            margin-top: -8px;
        }

        .hero-form-card input {
            font-size: 14px;
            padding: 11px 14px;
        }

        .hero-form-card .btn-submit {
            background: var(--accent-gold);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 13px;
            border-radius: var(--radius-sm);
            width: 100%;
            text-align: center;
            transition: background var(--transition), transform var(--transition-fast);
            cursor: pointer;
            border: none;
            letter-spacing: 0.5px;
        }

        .hero-form-card .btn-submit:hover {
            background: var(--accent-gold-dark);
            transform: translateY(-1px);
        }

        .hero-form-card .form-note {
            font-size: 12px;
            color: var(--text-light);
            text-align: center;
        }

        /* ========== 通用板块标题 ========== */
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-gold);
            background: var(--accent-gold-light);
            padding: 5px 16px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .section-header h2 {
            font-size: var(--font-lg);
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: var(--letter-spacing-title);
            line-height: var(--line-height-heading);
            margin-bottom: 8px;
        }

        .section-header .section-desc {
            font-size: 15px;
            color: var(--text-mid);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        section {
            padding: 70px 0;
        }

        /* ========== 优惠阶梯 ========== */
        .benefits-section {
            background: var(--bg-white);
        }

        .benefits-ladder {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            position: relative;
        }

        .benefit-level {
            background: var(--bg-warm);
            border-radius: var(--radius-lg);
            padding: 32px 20px;
            text-align: center;
            position: relative;
            transition: all var(--transition-slow);
            border: 2px solid transparent;
            display: flex;
            flex-direction: column;
            gap: 12px;
            z-index: 1;
        }

        .benefit-level:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent-gold);
            z-index: 2;
            background: #fff;
        }

        .benefit-level.featured {
            background: #fff;
            border-color: var(--accent-gold);
            box-shadow: var(--shadow-md);
            z-index: 2;
            transform: scale(1.03);
        }

        .benefit-level.featured:hover {
            transform: scale(1.03) translateY(-4px);
            box-shadow: var(--shadow-xl);
        }

        .benefit-level .level-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            background: var(--primary-blue-light);
            color: var(--primary-blue);
            flex-shrink: 0;
        }

        .benefit-level.featured .level-icon {
            background: var(--accent-gold-light);
            color: var(--accent-gold-dark);
        }

        .benefit-level .level-name {
            font-weight: 700;
            font-size: 16px;
            color: var(--text-dark);
            letter-spacing: var(--letter-spacing-title);
        }

        .benefit-level .level-desc {
            font-size: 13px;
            color: var(--text-mid);
            line-height: 1.5;
        }

        .benefit-level .level-perks {
            font-size: 12px;
            color: var(--text-light);
            line-height: 1.6;
            text-align: left;
            padding: 0 8px;
        }

        .benefit-level .level-perks li {
            padding: 2px 0;
            padding-left: 16px;
            position: relative;
        }

        .benefit-level .level-perks li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 11px;
        }

        /* ========== 套餐对比 ========== */
        .plans-section {
            background: var(--bg-warm);
        }

        .plans-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }

        .plan-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            box-shadow: var(--shadow-sm);
            border: 2px solid transparent;
            display: flex;
            flex-direction: column;
            gap: 16px;
            transition: all var(--transition-slow);
            position: relative;
        }

        .plan-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .plan-card.recommended {
            border-color: var(--accent-gold);
            box-shadow: var(--shadow-md);
            background: #FFFDF9;
        }

        .plan-card .plan-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent-gold);
            color: #fff;
            padding: 6px 20px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1px;
            white-space: nowrap;
        }

        .plan-card .plan-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-dark);
            text-align: center;
            letter-spacing: var(--letter-spacing-title);
            margin-top: 8px;
        }

        .plan-card .plan-price {
            text-align: center;
            font-size: 40px;
            font-weight: 700;
            color: var(--primary-blue);
            letter-spacing: -1px;
        }

        .plan-card .plan-price span {
            font-size: 16px;
            font-weight: 400;
            color: var(--text-mid);
        }

        .plan-card .plan-features {
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.5;
            flex: 1;
        }

        .plan-card .plan-features li {
            padding-left: 20px;
            position: relative;
        }

        .plan-card .plan-features li::before {
            content: '•';
            position: absolute;
            left: 4px;
            color: var(--accent-gold);
            font-weight: 700;
        }

        .plan-card .btn-plan {
            display: block;
            text-align: center;
            padding: 13px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            cursor: pointer;
            border: 2px solid var(--primary-blue);
            background: transparent;
            color: var(--primary-blue);
            letter-spacing: 0.5px;
        }

        .plan-card .btn-plan:hover {
            background: var(--primary-blue);
            color: #fff;
        }

        .plan-card.recommended .btn-plan {
            background: var(--accent-gold);
            color: #fff;
            border-color: var(--accent-gold);
        }

        .plan-card.recommended .btn-plan:hover {
            background: var(--accent-gold-dark);
            border-color: var(--accent-gold-dark);
        }

        /* ========== 保障条 ========== */
        .guarantee-section {
            background: var(--bg-white);
            padding: 50px 0;
        }

        .guarantee-strip {
            display: flex;
            align-items: center;
            justify-content: space-around;
            gap: 24px;
            flex-wrap: wrap;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            padding: 16px 20px;
            background: var(--bg-warm);
            border-radius: var(--radius);
            transition: all var(--transition);
            flex: 1;
            min-width: 180px;
            justify-content: center;
        }

        .guarantee-item:hover {
            background: var(--primary-blue-lighter);
            transform: translateY(-2px);
        }

        .guarantee-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-blue-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
            color: var(--primary-blue);
        }

        /* ========== 里程碑 ========== */
        .milestone-section {
            background: var(--bg-warm);
        }

        .milestone-timeline {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 0;
            position: relative;
            padding: 20px 0;
        }

        .milestone-timeline::before {
            content: '';
            position: absolute;
            top: 36px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: linear-gradient(to right, var(--primary-blue-light), var(--accent-gold), var(--primary-blue-light));
            border-radius: 1px;
        }

        .milestone-node {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 12px;
            flex: 1;
            position: relative;
            z-index: 1;
            text-align: center;
            min-width: 100px;
        }

        .milestone-dot {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--primary-blue);
            border: 4px solid var(--bg-warm);
            box-shadow: 0 0 0 4px var(--primary-blue-light);
            flex-shrink: 0;
            z-index: 2;
        }

        .milestone-node:nth-child(3) .milestone-dot {
            background: var(--accent-gold);
            box-shadow: 0 0 0 6px var(--accent-gold-light);
        }

        .milestone-year {
            font-weight: 700;
            font-size: 18px;
            color: var(--primary-blue);
            letter-spacing: -0.5px;
        }

        .milestone-desc {
            font-size: 13px;
            color: var(--text-mid);
            line-height: 1.5;
            max-width: 160px;
        }

        /* ========== 资讯区 ========== */
        .news-section {
            background: var(--bg-white);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.6fr 1fr;
            gap: 40px;
            align-items: start;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-list-item {
            padding: 18px 0;
            border-bottom: 1px solid #f0f0f0;
            display: flex;
            flex-direction: column;
            gap: 6px;
            transition: all var(--transition);
            cursor: pointer;
        }

        .news-list-item:hover {
            padding-left: 8px;
            border-bottom-color: var(--accent-gold-light);
        }

        .news-list-item:last-child {
            border-bottom: none;
        }

        .news-list-item .news-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.4;
            transition: color var(--transition);
        }

        .news-list-item:hover .news-title {
            color: var(--accent-gold);
        }

        .news-list-item .news-meta {
            font-size: 12px;
            color: var(--text-light);
            display: flex;
            gap: 16px;
        }

        .news-list-item .news-excerpt {
            font-size: 13px;
            color: var(--text-mid);
            line-height: 1.5;
        }

        .news-sidebar {
            background: var(--bg-warm);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            position: sticky;
            top: calc(var(--nav-height) + var(--steps-bar-height) + 24px);
        }

        .news-sidebar h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: var(--letter-spacing-title);
        }

        .news-sidebar .hot-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .news-sidebar .hot-tag {
            padding: 6px 14px;
            background: #fff;
            border-radius: 20px;
            font-size: 13px;
            color: var(--text-mid);
            cursor: pointer;
            transition: all var(--transition);
            border: 1px solid #e8e8e8;
        }

        .news-sidebar .hot-tag:hover {
            background: var(--accent-gold);
            color: #fff;
            border-color: var(--accent-gold);
        }

        .news-sidebar .rec-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .news-sidebar .rec-item {
            font-size: 14px;
            color: var(--text-dark);
            cursor: pointer;
            padding: 8px 0;
            border-bottom: 1px dashed #e8e8e8;
            transition: color var(--transition);
            line-height: 1.4;
        }

        .news-sidebar .rec-item:hover {
            color: var(--accent-gold);
        }

        /* ========== 相关推荐 ========== */
        .related-section {
            background: var(--bg-warm);
            overflow: hidden;
        }

        .related-track {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            padding: 8px 0 16px;
            scrollbar-width: thin;
            scrollbar-color: #D1D9E0 transparent;
        }

        .related-track::-webkit-scrollbar {
            height: 4px;
        }
        .related-track::-webkit-scrollbar-track {
            background: transparent;
        }
        .related-track::-webkit-scrollbar-thumb {
            background: #D1D9E0;
            border-radius: 4px;
        }

        .related-card {
            flex: 0 0 280px;
            scroll-snap-align: start;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-slow);
            cursor: pointer;
            flex-shrink: 0;
        }

        .related-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .related-card-img {
            width: 100%;
            height: 170px;
            object-fit: cover;
            background: var(--primary-blue-lighter);
        }

        .related-card-body {
            padding: 16px 18px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .related-card-body .related-card-title {
            font-weight: 600;
            font-size: 15px;
            color: var(--text-dark);
            line-height: 1.4;
        }

        .related-card-body .related-card-desc {
            font-size: 13px;
            color: var(--text-mid);
            line-height: 1.5;
        }

        /* ========== 限时入口 ========== */
        .limited-section {
            background: linear-gradient(135deg, #1A3A54 0%, #1A5B8C 40%, #13476E 100%);
            color: #fff;
            padding: 50px 0;
            position: relative;
            overflow: hidden;
        }

        .limited-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -100px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(198,156,109,0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .limited-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .limited-info {
            display: flex;
            flex-direction: column;
            gap: 12px;
            flex: 1;
            min-width: 260px;
        }

        .limited-info h2 {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: var(--letter-spacing-title);
            line-height: var(--line-height-heading);
        }

        .limited-info .limited-desc {
            font-size: 15px;
            opacity: 0.9;
            line-height: 1.6;
        }

        .countdown-box {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .countdown-unit {
            background: rgba(255,255,255,0.12);
            border-radius: var(--radius);
            padding: 14px 18px;
            text-align: center;
            min-width: 60px;
            backdrop-filter: blur(4px);
        }

        .countdown-unit .count-num {
            font-size: 32px;
            font-weight: 700;
            line-height: 1;
            color: #fff;
        }

        .countdown-unit .count-label {
            font-size: 11px;
            opacity: 0.7;
            margin-top: 4px;
        }

        .countdown-sep {
            font-size: 28px;
            font-weight: 300;
            opacity: 0.6;
        }

        .limited-cta {
            flex-shrink: 0;
        }

        .limited-cta .btn-limited {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-gold);
            color: #fff;
            padding: 16px 32px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 16px;
            letter-spacing: 0.5px;
            transition: all var(--transition);
            cursor: pointer;
            border: none;
            white-space: nowrap;
            box-shadow: 0 8px 24px rgba(198,156,109,0.35);
        }

        .limited-cta .btn-limited:hover {
            background: #D4A76A;
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(198,156,109,0.45);
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--bg-white);
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: var(--bg-warm);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .faq-item.active {
            background: #fff;
            border-color: #e8e8e8;
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            padding: 18px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            color: var(--text-dark);
            gap: 12px;
            user-select: none;
            transition: color var(--transition);
        }

        .faq-question:hover {
            color: var(--accent-gold);
        }

        .faq-question .faq-q {
            color: var(--accent-gold);
            font-weight: 700;
            flex-shrink: 0;
        }

        .faq-question .faq-arrow {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #e8e8e8;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all var(--transition);
            font-size: 12px;
            color: var(--text-mid);
        }

        .faq-item.active .faq-arrow {
            background: var(--accent-gold);
            color: #fff;
            transform: rotate(180deg);
        }

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

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 20px 20px;
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        .faq-answer-inner .faq-a {
            color: var(--primary-blue);
            font-weight: 700;
            margin-right: 4px;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #1E1E1E;
            color: #ccc;
            padding: 40px 0;
        }

        .footer-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
            text-align: center;
        }

        .footer-logo {
            font-weight: 700;
            font-size: 20px;
            color: #fff;
            letter-spacing: var(--letter-spacing-title);
        }

        .footer-links {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .footer-links a {
            font-size: 14px;
            color: #aaa;
            transition: color var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent-gold);
        }

        .footer-bottom {
            font-size: 13px;
            color: #777;
            border-top: 1px solid #333;
            padding-top: 16px;
            width: 100%;
            max-width: var(--max-width);
        }

        .footer-bottom strong {
            color: #ccc;
            font-weight: 500;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            :root {
                --font-xl: 40px;
                --font-lg: 28px;
                --font-md: 20px;
            }
            .hero-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .hero-cover-card {
                grid-column: 1 / -1;
                max-height: 350px;
                aspect-ratio: 16/9;
            }
            .hero-toc {
                grid-column: 1 / -1;
            }
            .hero-form-card {
                grid-column: 1 / -1;
            }
            .benefits-ladder {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .benefit-level.featured {
                transform: none;
            }
            .benefit-level.featured:hover {
                transform: translateY(-4px);
            }
            .plans-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .plan-card.recommended {
                order: -1;
            }
            .news-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .news-sidebar {
                position: static;
            }
            .milestone-timeline {
                flex-wrap: wrap;
                gap: 20px;
                justify-content: center;
            }
            .milestone-timeline::before {
                display: none;
            }
            .milestone-node {
                flex: 0 0 40%;
                min-width: 120px;
            }
            .limited-inner {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .countdown-box {
                justify-content: center;
            }
        }

        @media (max-width: 768px) {
            :root {
                --font-xl: 32px;
                --font-lg: 24px;
                --font-md: 20px;
                --font-base: 15px;
                --nav-height: 60px;
                --steps-bar-height: 48px;
            }
            body {
                padding-top: calc(var(--nav-height) + var(--steps-bar-height));
            }
            section {
                padding: 50px 0;
            }
            .nav-menu {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                gap: 16px;
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                transition: transform var(--transition-slow);
                z-index: 998;
            }
            .nav-menu.open {
                transform: translateY(0);
            }
            .nav-toggle {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
            .nav-menu .nav-cta-mobile {
                display: inline-flex;
                background: var(--accent-gold);
                color: #fff;
                padding: 10px 20px;
                border-radius: var(--radius-sm);
                font-weight: 600;
                align-self: center;
            }
            .steps-bar {
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }
            .steps-inner {
                gap: 4px;
                padding: 0 12px;
                min-width: 500px;
                justify-content: flex-start;
            }
            .step-connector {
                flex: 0 0 20px;
                max-width: 30px;
            }
            .step-item {
                font-size: 11px;
                gap: 4px;
            }
            .step-num {
                width: 24px;
                height: 24px;
                font-size: 11px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .hero-cover-card {
                aspect-ratio: 16/10;
                max-height: 280px;
            }
            .hero-toc h1 {
                font-size: 26px;
            }
            .benefits-ladder {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .benefit-level.featured {
                transform: none;
            }
            .guarantee-strip {
                flex-direction: column;
                gap: 10px;
            }
            .guarantee-item {
                min-width: auto;
                width: 100%;
            }
            .milestone-timeline {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
                padding-left: 24px;
            }
            .milestone-timeline::before {
                display: block;
                top: 0;
                bottom: 0;
                left: 10px;
                width: 2px;
                height: auto;
                right: auto;
            }
            .milestone-node {
                flex-direction: row;
                align-items: center;
                gap: 12px;
                text-align: left;
                flex: 1;
                min-width: auto;
            }
            .milestone-dot {
                width: 16px;
                height: 16px;
                border-width: 3px;
                box-shadow: 0 0 0 3px var(--primary-blue-light);
            }
            .milestone-desc {
                max-width: none;
            }
            .related-card {
                flex: 0 0 240px;
            }
            .countdown-unit {
                padding: 10px 12px;
                min-width: 48px;
            }
            .countdown-unit .count-num {
                font-size: 24px;
            }
            .limited-info h2 {
                font-size: 22px;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer-inner {
                padding: 0 16px 16px;
                font-size: 13px;
            }
            .footer-links {
                gap: 14px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --font-xl: 28px;
                --font-lg: 22px;
                --font-md: 18px;
                --font-base: 14px;
            }
            .container {
                padding: 0 16px;
            }
            section {
                padding: 40px 0;
            }
            .hero-cover-card {
                aspect-ratio: 4/3;
                max-height: 220px;
            }
            .hero-toc h1 {
                font-size: 22px;
            }
            .hero-form-card {
                padding: 20px 16px;
            }
            .section-header h2 {
                font-size: 20px;
            }
            .plan-card {
                padding: 24px 16px;
            }
            .plan-card .plan-price {
                font-size: 32px;
            }
            .countdown-box {
                gap: 6px;
            }
            .countdown-unit {
                padding: 8px 10px;
                min-width: 40px;
            }
            .countdown-unit .count-num {
                font-size: 20px;
            }
            .countdown-sep {
                font-size: 20px;
            }
            .limited-cta .btn-limited {
                padding: 14px 24px;
                font-size: 14px;
            }
            .related-card {
                flex: 0 0 220px;
            }
            .related-card-img {
                height: 130px;
            }
        }