/* roulang page: index */
:root {
            --color-primary: #0F172A;
            --color-primary-light: #1E293B;
            --color-accent: #059669;
            --color-accent-hover: #047857;
            --color-highlight: #D97706;
            --color-bg: #FAFAFA;
            --color-card-bg: #FFFFFF;
            --color-dark-section: #090D16;
            --color-text: #334155;
            --color-text-dark: #020617;
            --color-text-muted: #64748B;
            --color-border: #E2E8F0;
            --color-border-dark: #1E293B;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-subtle: 0 4px 6px -1px rgba(0, 0, 0, 0.04), 0 2px 4px -2px rgba(0, 0, 0, 0.03);
            --shadow-card: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -4px rgba(0, 0, 0, 0.03);
            --shadow-float: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
            --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
            --container-max: 1240px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            color: var(--color-text);
            background-color: var(--color-bg);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        button, input, select {
            font-family: inherit;
            outline: none;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部导航与Top Bar */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--color-border);
        }

        .top-bar {
            background-color: #F8FAFC;
            border-bottom: 1px solid #EDF2F7;
            font-size: 12px;
            color: var(--color-text-muted);
            padding: 6px 0;
        }

        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .nav-main {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }

        .logo-box {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            font-size: 20px;
            letter-spacing: -0.02em;
            color: var(--color-primary);
        }

        .logo-box svg {
            width: 32px;
            height: 32px;
            fill: var(--color-accent);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-menu a {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
        }

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

        .nav-cta-btn {
            background-color: var(--color-primary);
            color: #FFFFFF;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            border: 1px solid var(--color-primary);
            cursor: pointer;
            transition: var(--transition);
        }

        .nav-cta-btn:hover {
            background-color: var(--color-primary-light);
            box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
        }

        /* 通用板块结构 */
        section {
            padding: 96px 0;
            position: relative;
        }

        .section-header {
            margin-bottom: 54px;
            text-align: center;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-badge {
            display: inline-block;
            background-color: #ECFDF5;
            color: var(--color-accent);
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 14px;
            border: 1px solid #A7F3D0;
        }

        .section-title {
            font-size: 32px;
            line-height: 1.25;
            color: var(--color-text-dark);
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* Section 1: Hero 新品发布与倒计时 */
        .hero-section {
            background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
            padding: 80px 0 100px;
            border-bottom: 1px solid var(--color-border);
            position: relative;
            overflow: hidden;
        }

        .hero-wrap {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 48px;
            align-items: center;
        }

        .hero-left h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--color-text-dark);
            letter-spacing: -0.03em;
            margin-bottom: 24px;
        }

        .hero-left .hero-intro {
            font-size: 17px;
            color: var(--color-text);
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .hero-points {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 36px;
        }

        .hero-point-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-dark);
        }

        .hero-point-item svg {
            width: 18px;
            height: 18px;
            fill: var(--color-accent);
            flex-shrink: 0;
            margin-top: 2px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #FFFFFF;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-primary:hover {
            background-color: var(--color-accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 10px 15px -3px rgba(5, 150, 105, 0.3);
        }

        .btn-secondary {
            background-color: #FFFFFF;
            color: var(--color-text-dark);
            border: 1px solid var(--color-border);
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-secondary:hover {
            background-color: #F8FAFC;
            border-color: #CBD5E1;
        }

        /* 倒计时环面板 */
        .countdown-stage {
            background: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-card);
            text-align: center;
            position: relative;
        }

        .countdown-title {
            font-size: 14px;
            text-transform: uppercase;
            font-weight: 700;
            letter-spacing: 0.05em;
            color: var(--color-text-muted);
            margin-bottom: 20px;
        }

        .countdown-ring-box {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 24px;
        }

        .count-block {
            background: #F8FAFC;
            border: 1px solid #E2E8F0;
            border-radius: var(--radius-md);
            padding: 16px 14px;
            min-width: 64px;
        }

        .count-num {
            font-size: 26px;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1;
            font-variant-numeric: tabular-nums;
        }

        .count-lbl {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-top: 6px;
        }

        .countdown-desc {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* Section 2: 入口矩阵 */
        .entry-matrix-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .entry-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .entry-card:hover {
            transform: translateY(-4px);
            border-color: #94A3B8;
            box-shadow: var(--shadow-float);
        }

        .entry-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: #ECFDF5;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }

        .entry-icon svg {
            width: 24px;
            height: 24px;
            fill: var(--color-accent);
        }

        .entry-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-dark);
            margin-bottom: 10px;
        }

        .entry-text {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .entry-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Section 3: 架构与体系深读 */
        .about-system-section {
            background-color: #FFFFFF;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .system-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .system-img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
        }

        .system-specs-box {
            background: #F8FAFC;
            border-left: 4px solid var(--color-accent);
            padding: 16px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            font-size: 14px;
            color: var(--color-text);
            line-height: 1.7;
        }

        /* Section 4: 六卡核心优势矩阵 */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .adv-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 30px;
            transition: var(--transition);
        }

        .adv-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: #CBD5E1;
        }

        .adv-num {
            font-size: 13px;
            font-weight: 800;
            color: var(--color-accent);
            letter-spacing: 0.1em;
            margin-bottom: 12px;
        }

        .adv-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-dark);
            margin-bottom: 12px;
        }

        .adv-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* Section 5: 三联产品矩阵 */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .product-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-subtle);
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

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

        .product-media {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .product-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .product-body {
            padding: 28px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .product-tag {
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 8px;
        }

        .product-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-dark);
            margin-bottom: 12px;
        }

        .product-summary {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .feature-checklist {
            list-style: none;
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .feature-checklist li {
            font-size: 13px;
            color: var(--color-text);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .feature-checklist svg {
            width: 14px;
            height: 14px;
            fill: var(--color-accent);
            flex-shrink: 0;
        }

        /* Section 6: 深色沉浸式博弈理念与案例 */
        .dark-methodology-section {
            background-color: var(--color-dark-section);
            color: #F8FAFC;
        }

        .dark-methodology-section .section-title {
            color: #FFFFFF;
        }

        .dark-methodology-section .section-desc {
            color: #94A3B8;
        }

        .dark-methodology-section .section-badge {
            background: rgba(5, 150, 105, 0.2);
            color: #34D399;
            border-color: rgba(5, 150, 105, 0.4);
        }

        .dark-content-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
        }

        .dark-box {
            background: #111827;
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-md);
            padding: 32px;
        }

        .dark-box h3 {
            font-size: 20px;
            color: #F3F4F6;
            margin-bottom: 16px;
            font-weight: 700;
        }

        .dark-box p {
            font-size: 14px;
            color: #9CA3AF;
            line-height: 1.7;
            margin-bottom: 16px;
        }

        /* Section 7: 精选分类 */
        .category-tabs-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .cat-card {
            background: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition);
        }

        .cat-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card);
        }

        .cat-badge {
            font-size: 12px;
            background: #F1F5F9;
            color: var(--color-text-dark);
            padding: 2px 8px;
            border-radius: var(--radius-sm);
            font-weight: 600;
        }

        .cat-title {
            font-size: 16px;
            font-weight: 700;
            margin: 12px 0 8px;
            color: var(--color-text-dark);
        }

        .cat-desc {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* Section 8: 核心计算与数据指标条 */
        .metrics-strip-section {
            background: #FFFFFF;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            padding: 60px 0;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .metric-val {
            font-size: 40px;
            font-weight: 800;
            color: var(--color-text-dark);
            line-height: 1.1;
            margin-bottom: 8px;
            font-variant-numeric: tabular-nums;
        }

        .metric-val span {
            color: var(--color-accent);
        }

        .metric-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
        }

        .metric-sub {
            font-size: 12px;
            color: var(--color-text-muted);
        }

        /* Section 9: 资讯与动态 */
        .insights-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .insight-card {
            background: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .insight-body {
            padding: 24px;
        }

        .insight-date {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-bottom: 8px;
        }

        .insight-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text-dark);
            line-height: 1.4;
            margin-bottom: 10px;
        }

        .insight-summary {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* Section 10: 版本更新日志 */
        .version-log-section {
            background: #FFFFFF;
            border-top: 1px solid var(--color-border);
        }

        .timeline-box {
            max-width: 860px;
            margin: 0 auto;
            border-left: 2px solid var(--color-border);
            padding-left: 32px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 36px;
        }

        .timeline-item:last-child {
            margin-bottom: 0;
        }

        .timeline-dot {
            position: absolute;
            left: -39px;
            top: 4px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--color-accent);
            border: 3px solid #FFFFFF;
            box-shadow: 0 0 0 2px var(--color-accent);
        }

        .timeline-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            padding: 2px 8px;
            background: #F1F5F9;
            color: var(--color-primary);
            border-radius: var(--radius-sm);
            margin-bottom: 8px;
        }

        .timeline-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-dark);
            margin-bottom: 8px;
        }

        .timeline-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* Section 11: 多端与客户端支持 */
        .app-multi-section {
            background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .app-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .app-card {
            background: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-subtle);
        }

        .app-card svg {
            width: 48px;
            height: 48px;
            fill: var(--color-primary);
            margin-bottom: 16px;
        }

        .app-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-dark);
            margin-bottom: 8px;
        }

        .app-card p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* Section 12: 快速解答与常见问题 */
        .faq-box {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            background: #FFFFFF;
            overflow: hidden;
        }

        .faq-trigger {
            width: 100%;
            text-align: left;
            padding: 20px 24px;
            background: none;
            border: none;
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text-dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }

        .faq-trigger svg {
            width: 16px;
            height: 16px;
            fill: var(--color-text-muted);
            transition: transform 0.2s ease;
        }

        .faq-item.active .faq-trigger svg {
            transform: rotate(180deg);
        }

        .faq-content {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            display: none;
        }

        .faq-item.active .faq-content {
            display: block;
        }

        /* 预约转化与行动召唤 */
        .contact-section {
            background-color: var(--color-primary);
            color: #FFFFFF;
            padding: 80px 0;
        }

        .contact-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .contact-info h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .contact-info p {
            font-size: 15px;
            color: #94A3B8;
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .contact-form {
            background: #FFFFFF;
            padding: 32px;
            border-radius: var(--radius-lg);
            color: var(--color-text);
            box-shadow: var(--shadow-float);
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text-dark);
            margin-bottom: 6px;
        }

        .form-control {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            font-size: 14px;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.15);
        }

        .btn-submit {
            width: 100%;
            background-color: var(--color-accent);
            color: #FFFFFF;
            padding: 14px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            margin-top: 8px;
        }

        .btn-submit:hover {
            background-color: var(--color-accent-hover);
        }

        /* 统一页脚 */
        .site-footer {
            background-color: #0B1120;
            color: #94A3B8;
            padding: 64px 0 32px;
            border-top: 1px solid #1E293B;
            font-size: 13px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #F8FAFC;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid #1E293B;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* 移动端菜单控制 */
        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .mobile-nav-toggle svg {
            width: 24px;
            height: 24px;
            fill: var(--color-primary);
        }

        @media (max-width: 1024px) {
            .hero-wrap,
            .system-layout,
            .dark-content-grid,
            .contact-wrap {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .entry-matrix-grid,
            .category-tabs-grid,
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .advantages-grid,
            .products-grid,
            .insights-grid,
            .app-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

        @media (max-width: 768px) {
            section {
                padding: 60px 0;
            }

            .top-bar {
                display: none;
            }

            .mobile-nav-toggle {
                display: block;
            }

            .nav-menu {
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                background: #FFFFFF;
                flex-direction: column;
                padding: 24px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-card);
                display: none;
            }

            .nav-menu.open {
                display: flex;
            }

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

            .hero-left h1 {
                font-size: 32px;
            }

            .hero-points {
                grid-template-columns: 1fr;
            }

            .entry-matrix-grid,
            .advantages-grid,
            .products-grid,
            .category-tabs-grid,
            .metrics-grid,
            .insights-grid,
            .app-grid,
            .footer-grid {
                grid-template-columns: 1fr;
            }

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