/* roulang page: index */
:root {
      --primary: #6366F1;
      --primary-dark: #4F46E5;
      --secondary: #06B6D4;
      --accent: #F59E0B;
      --bg-main: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0F172A;
      --bg-dark-card: #1E293B;
      --text-title: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --shadow-sm: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-lg: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.1);
      --radius-xl: 16px;
      --radius-full: 9999px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      color: var(--text-body);
      background-color: var(--bg-main);
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    ul {
      list-style: none;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      padding: 0.85rem 1.75rem;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      min-height: 48px;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff;
      box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
    }

    .btn-primary:hover {
      box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
      transform: translateY(-2px);
    }

    .btn-accent {
      background: linear-gradient(135deg, var(--accent), #D97706);
      color: #fff;
      box-shadow: 0 4px 14px 0 rgba(245, 158, 11, 0.35);
    }

    .btn-accent:hover {
      box-shadow: 0 6px 20px rgba(245, 158, 11, 0.45);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.4);
      color: #fff;
    }

    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.15);
      border-color: #fff;
    }

    .btn-outline-dark {
      background: #fff;
      border-color: var(--border-color);
      color: var(--text-title);
    }

    .btn-outline-dark:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .badge {
      display: inline-block;
      padding: 0.35rem 0.85rem;
      font-size: 0.8rem;
      font-weight: 600;
      border-radius: var(--radius-full);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .badge-primary {
      background: rgba(99, 102, 241, 0.1);
      color: var(--primary);
    }

    .badge-accent {
      background: rgba(245, 158, 11, 0.15);
      color: #D97706;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 3.5rem;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-title-wrap h2 {
      font-size: 2.25rem;
      color: var(--text-title);
      margin-top: 0.75rem;
      margin-bottom: 1rem;
      line-height: 1.3;
    }

    .section-title-wrap p {
      color: var(--text-muted);
      font-size: 1.05rem;
    }

    /* Top Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .top-bar {
      background: var(--bg-dark);
      color: #94A3B8;
      font-size: 0.8rem;
      padding: 0.4rem 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

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

    .top-bar-status {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .status-dot {
      width: 8px;
      height: 8px;
      background: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10B981;
    }

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

    .nav-logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--text-title);
    }

    .logo-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.2rem;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 2rem;
    }

    .nav-link {
      font-weight: 500;
      color: var(--text-body);
      position: relative;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-title);
      cursor: pointer;
    }

    /* Hero Section */
    .hero-section {
      position: relative;
      background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.88)), url('/assets/images/19870667af895a3a.jpg') center/cover no-repeat;
      color: #fff;
      padding: 6.5rem 0 5rem;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 3.5rem;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 3.25rem;
      line-height: 1.2;
      margin-bottom: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
    }

    .hero-content p {
      font-size: 1.15rem;
      line-height: 1.7;
      color: #CBD5E1;
      margin-bottom: 2rem;
    }

    .group-status-strip {
      display: inline-flex;
      align-items: center;
      gap: 0.75rem;
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(8px);
      padding: 0.5rem 1.25rem;
      border-radius: var(--radius-full);
      margin-bottom: 1.75rem;
      border: 1px solid rgba(255, 255, 255, 0.15);
      font-size: 0.9rem;
    }

    .avatar-group {
      display: flex;
      margin-right: 0.25rem;
    }

    .avatar-mini {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      border: 2px solid #fff;
      margin-left: -8px;
      background: var(--primary);
    }
    .avatar-mini:first-child { margin-left: 0; background: var(--secondary); }
    .avatar-mini:last-child { background: var(--accent); }

    .hero-actions {
      display: flex;
      gap: 1.25rem;
      flex-wrap: wrap;
    }

    .hero-card-panel {
      background: rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-xl);
      padding: 2rem;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
    }

    .panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 1.5rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      padding-bottom: 1rem;
    }

    .panel-list {
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
    }

    .panel-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: rgba(15, 23, 42, 0.4);
      padding: 0.85rem 1rem;
      border-radius: 10px;
    }

    .panel-meta {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    /* Section Global Styles */
    section {
      padding: 5.5rem 0;
    }

    .bg-light {
      background-color: #FFFFFF;
    }

    .bg-surface {
      background-color: var(--bg-main);
    }

    .bg-dark-block {
      background-color: var(--bg-dark);
      color: #fff;
    }

    .bg-dark-block .section-title-wrap h2 {
      color: #fff;
    }

    .bg-dark-block .section-title-wrap p {
      color: #94A3B8;
    }

    /* 1. 卖点三连 */
    .features-triple {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .triple-card {
      background: #FFFFFF;
      padding: 2.5rem 2rem;
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .triple-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      opacity: 0;
      transition: var(--transition);
    }

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

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

    .triple-icon {
      width: 56px;
      height: 56px;
      border-radius: 14px;
      background: rgba(99, 102, 241, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 1.5rem;
    }

    .triple-card h3 {
      font-size: 1.35rem;
      color: var(--text-title);
      margin-bottom: 0.75rem;
    }

    .triple-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
    }

    /* 2. 入口矩阵 */
    .portal-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }

    .portal-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-xl);
      padding: 2rem 1.5rem;
      text-align: center;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

    .portal-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }

    .portal-icon {
      width: 64px;
      height: 64px;
      border-radius: 50%;
      margin: 0 auto 1.25rem;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.75rem;
      background: #F1F5F9;
      color: var(--primary);
      transition: var(--transition);
    }

    .portal-card:hover .portal-icon {
      background: var(--primary);
      color: #fff;
    }

    .portal-card h3 {
      font-size: 1.2rem;
      color: var(--text-title);
      margin-bottom: 0.5rem;
    }

    .portal-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 3. 最新发布 */
    .release-box {
      background: #fff;
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-color);
      padding: 2.5rem;
      box-shadow: var(--shadow-sm);
    }

    .release-timeline {
      display: flex;
      flex-direction: column;
      gap: 2rem;
    }

    .timeline-item {
      display: grid;
      grid-template-columns: 180px 1fr;
      gap: 2rem;
      padding-bottom: 2rem;
      border-bottom: 1px dashed var(--border-color);
    }

    .timeline-item:last-child {
      padding-bottom: 0;
      border-bottom: none;
    }

    .timeline-meta .ver-tag {
      display: inline-block;
      background: var(--bg-dark);
      color: #fff;
      font-weight: 700;
      padding: 0.25rem 0.75rem;
      border-radius: 6px;
      font-size: 0.9rem;
      margin-bottom: 0.5rem;
    }

    .timeline-meta .ver-date {
      color: var(--text-muted);
      font-size: 0.85rem;
    }

    .timeline-body h3 {
      font-size: 1.2rem;
      color: var(--text-title);
      margin-bottom: 0.5rem;
    }

    .timeline-body p {
      color: var(--text-body);
      font-size: 0.95rem;
    }

    /* 4. 热门专题 (图文宽卡) */
    .topics-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .topic-card {
      background: #fff;
      border-radius: var(--radius-xl);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

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

    .topic-img-wrapper {
      position: relative;
      height: 200px;
      overflow: hidden;
    }

    .topic-img-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

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

    .topic-content {
      padding: 1.75rem;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .topic-content h3 {
      font-size: 1.25rem;
      color: var(--text-title);
      margin: 0.75rem 0;
    }

    .topic-content p {
      color: var(--text-muted);
      font-size: 0.95rem;
      margin-bottom: 1.5rem;
      flex-grow: 1;
    }

    /* 5. 资讯列表 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .news-card {
      background: #fff;
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-color);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .news-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-3px);
      border-color: var(--primary);
    }

    .news-date {
      font-size: 0.85rem;
      color: var(--secondary);
      font-weight: 600;
      margin-bottom: 0.75rem;
      display: block;
    }

    .news-card h3 {
      font-size: 1.2rem;
      color: var(--text-title);
      margin-bottom: 0.75rem;
      line-height: 1.4;
    }

    .news-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
    }

    /* 6. 数据指标条 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
    }

    .metric-box {
      background: var(--bg-dark-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-xl);
      padding: 2.5rem 1.5rem;
      text-align: center;
      transition: var(--transition);
    }

    .metric-box:hover {
      border-color: var(--secondary);
      transform: translateY(-4px);
    }

    .metric-val {
      font-size: 3rem;
      font-weight: 800;
      color: transparent;
      background: linear-gradient(135deg, #fff, var(--secondary));
      -webkit-background-clip: text;
      margin-bottom: 0.5rem;
      line-height: 1;
    }

    .metric-label {
      color: #94A3B8;
      font-size: 1rem;
      font-weight: 500;
    }

    /* 7. 口碑反馈 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .review-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-xl);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-stars {
      color: var(--accent);
      margin-bottom: 1rem;
      font-size: 0.9rem;
    }

    .review-text {
      color: var(--text-body);
      font-size: 0.95rem;
      line-height: 1.6;
      margin-bottom: 1.5rem;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .user-avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }

    /* 8. 技术架构深入 (交错图文) */
    .arch-cross {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 4rem;
      align-items: center;
    }

    .arch-img-holder {
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }

    .arch-specs {
      margin-top: 1.5rem;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1rem;
    }

    .spec-item {
      background: #fff;
      padding: 1rem;
      border-radius: 8px;
      border-left: 3px solid var(--primary);
    }

    .spec-item h4 {
      font-size: 0.95rem;
      color: var(--text-title);
      margin-bottom: 0.25rem;
    }

    .spec-item span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 9. 安全体系 */
    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }

    .security-card {
      background: var(--bg-dark-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-xl);
      padding: 2rem 1.5rem;
      text-align: center;
    }

    .security-icon {
      font-size: 2.2rem;
      color: var(--secondary);
      margin-bottom: 1.25rem;
    }

    .security-card h3 {
      font-size: 1.15rem;
      color: #fff;
      margin-bottom: 0.75rem;
    }

    .security-card p {
      font-size: 0.9rem;
      color: #94A3B8;
    }

    /* 10. 新手入门流程 */
    .steps-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      position: relative;
    }

    .step-box {
      background: #fff;
      padding: 2rem;
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff;
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.25rem;
    }

    .step-box h3 {
      font-size: 1.15rem;
      color: var(--text-title);
      margin-bottom: 0.5rem;
    }

    .step-box p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 11. FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .faq-item {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item details summary {
      padding: 1.25rem 1.5rem;
      cursor: pointer;
      font-weight: 600;
      font-size: 1.05rem;
      color: var(--text-title);
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
    }

    .faq-item details summary::-webkit-details-marker {
      display: none;
    }

    .faq-item details summary::after {
      content: '\f078';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      font-size: 0.85rem;
      color: var(--text-muted);
      transition: transform 0.3s;
    }

    .faq-item details[open] summary::after {
      transform: rotate(180deg);
      color: var(--primary);
    }

    .faq-item details[open] {
      border-color: var(--primary);
    }

    .faq-content {
      padding: 0 1.5rem 1.25rem;
      color: var(--text-body);
      font-size: 0.95rem;
      line-height: 1.6;
    }

    /* 12. 统一收口联系入口与行动召唤 */
    .cta-strip {
      background: linear-gradient(135deg, var(--bg-dark), #1E1B4B);
      border-radius: var(--radius-xl);
      padding: 4.5rem 3rem;
      color: #fff;
      text-align: center;
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .cta-content {
      max-width: 720px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .cta-content h2 {
      font-size: 2.5rem;
      margin-bottom: 1rem;
      color: #fff;
    }

    .cta-content p {
      font-size: 1.1rem;
      color: #CBD5E1;
      margin-bottom: 2rem;
    }

    /* Footer */
    .site-footer {
      background: var(--bg-dark);
      color: #94A3B8;
      padding: 5rem 0 2rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.95rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }

    .footer-col h4 {
      color: #fff;
      font-size: 1.1rem;
      margin-bottom: 1.25rem;
      font-weight: 600;
    }

    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .arch-cross {
        grid-template-columns: 1fr;
      }
      .portal-grid, .security-grid, .steps-flow {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-menu, .nav-cta {
        display: none;
      }
      .nav-toggle {
        display: block;
      }
      .features-triple, .topics-grid, .news-grid, .reviews-grid {
        grid-template-columns: 1fr;
      }
      .portal-grid, .security-grid, .steps-flow, .metrics-bar {
        grid-template-columns: 1fr;
      }
      .hero-content h1 {
        font-size: 2.25rem;
      }
      .section-title-wrap h2 {
        font-size: 1.75rem;
      }
      .timeline-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
      }
    }