/* roulang page: index */
:root {
      --primary-color: #0F172A;
      --accent-color: #0EA5E9;
      --accent-emerald: #10B981;
      --bg-main: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0B0F19;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: rgba(226, 232, 240, 0.85);
      --border-dark: rgba(255, 255, 255, 0.12);
      --card-radius: 12px;
      --shadow-sm: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 12px 30px -4px rgba(15, 23, 42, 0.12);
      --sidebar-width: 250px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.7;
      letter-spacing: -0.01em;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-main);
      letter-spacing: -0.02em;
      font-weight: 700;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    /* 左侧 App Shell 导航架构 */
    .app-sidebar {
      position: fixed;
      top: 0;
      bottom: 0;
      left: 0;
      width: var(--sidebar-width);
      background-color: var(--bg-white);
      border-right: 1px solid var(--border-color);
      z-index: 1040;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 28px 20px;
    }

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--border-color);
    }

    .brand-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, #0F172A 0%, #0EA5E9 100%);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 8px;
      font-size: 1.25rem;
    }

    .brand-text {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.2;
    }

    .sidebar-nav {
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-top: 24px;
      flex-grow: 1;
    }

    .sidebar-link {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 14px;
      color: var(--text-body);
      border-radius: 8px;
      font-weight: 500;
      font-size: 0.95rem;
    }

    .sidebar-link i {
      font-size: 1.1rem;
      color: var(--text-muted);
      transition: color 0.2s;
    }

    .sidebar-link:hover, .sidebar-link.active {
      background-color: #F1F5F9;
      color: var(--accent-color);
    }

    .sidebar-link:hover i, .sidebar-link.active i {
      color: var(--accent-color);
    }

    .sidebar-footer {
      padding-top: 20px;
      border-top: 1px solid var(--border-color);
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    .sidebar-footer .status-indicator {
      display: inline-block;
      width: 8px;
      height: 8px;
      background-color: var(--accent-emerald);
      border-radius: 50%;
      margin-right: 6px;
    }

    /* 主内容视口展开 */
    .app-main-viewport {
      margin-left: var(--sidebar-width);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      background-color: var(--bg-main);
    }

    /* 移动端吸顶 Bar */
    .mobile-header {
      display: none;
      position: sticky;
      top: 0;
      z-index: 1030;
      background-color: var(--bg-white);
      border-bottom: 1px solid var(--border-color);
      padding: 12px 20px;
      align-items: center;
      justify-content: space-between;
    }

    /* 通用板块与排版 */
    section {
      padding: 72px 0;
      position: relative;
    }

    .section-header {
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--accent-color);
      background-color: rgba(14, 165, 233, 0.1);
      padding: 4px 12px;
      border-radius: 4px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.1rem;
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 720px;
      margin: 0 auto;
    }

    /* Section 1: Hero 首屏活动 KV 与倒计时条 */
    #hero {
      padding: 60px 0 80px 0;
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      position: relative;
    }

    .hero-banner-card {
      position: relative;
      border-radius: 16px;
      overflow: hidden;
      min-height: 480px;
      background-image: linear-gradient(rgba(15, 23, 42, 0.75), rgba(15, 23, 42, 0.88)), url('/assets/images/b8bd3be504239b0e.jpg');
      background-size: cover;
      background-position: center;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 60px 48px;
      color: #fff;
      box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.2);
    }

    .hero-title {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.25;
      color: #FFFFFF;
      margin-bottom: 20px;
    }

    .hero-intro {
      font-size: 1.1rem;
      max-width: 680px;
      color: #E2E8F0;
      line-height: 1.8;
      margin-bottom: 32px;
    }

    .countdown-bar {
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 10px;
      padding: 14px 24px;
      display: inline-flex;
      align-items: center;
      gap: 20px;
      margin-bottom: 32px;
      max-width: fit-content;
    }

    .countdown-item {
      display: flex;
      align-items: baseline;
      gap: 4px;
    }

    .countdown-num {
      font-size: 1.35rem;
      font-weight: 700;
      color: #38BDF8;
    }

    .countdown-txt {
      font-size: 0.8rem;
      color: #CBD5E1;
    }

    /* 按钮与交互规范 */
    .btn-action-primary {
      background-color: var(--accent-color);
      color: #FFFFFF;
      font-weight: 600;
      padding: 13px 28px;
      border-radius: 8px;
      border: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 46px;
    }

    .btn-action-primary:hover {
      background-color: #0284C7;
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(14, 165, 233, 0.35);
    }

    .btn-action-secondary {
      background-color: rgba(255, 255, 255, 0.15);
      color: #FFFFFF;
      font-weight: 600;
      padding: 13px 28px;
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, 0.3);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 46px;
    }

    .btn-action-secondary:hover {
      background-color: rgba(255, 255, 255, 0.25);
      color: #FFFFFF;
      transform: translateY(-2px);
    }

    /* Section 2: 产品矩阵 (5:7 栅格) */
    .matrix-img-box {
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      height: 100%;
      min-height: 360px;
    }

    .matrix-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .metric-badge-box {
      background-color: #F1F5F9;
      border-radius: 8px;
      padding: 16px;
      border-left: 4px solid var(--accent-color);
      margin-top: 20px;
    }

    /* Section 3: 优势与核心服务 (6宫格) */
    .service-card {
      background: var(--bg-white);
      border-radius: var(--card-radius);
      padding: 32px 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      height: 100%;
    }

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

    .service-icon-box {
      width: 48px;
      height: 48px;
      background-color: rgba(14, 165, 233, 0.1);
      color: var(--accent-color);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      margin-bottom: 20px;
    }

    /* Section 4: 热门资产交易展品卡片 */
    .asset-card {
      background: var(--bg-white);
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }

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

    .asset-thumb-box {
      position: relative;
      height: 200px;
      overflow: hidden;
    }

    .asset-thumb-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

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

    .asset-status-badge {
      position: absolute;
      top: 12px;
      right: 12px;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(4px);
      color: #38BDF8;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 4px;
    }

    .asset-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    /* Section 5: 深色沉浸式合规体系 */
    #compliance-dark {
      background-color: var(--bg-dark);
      color: #E2E8F0;
      padding: 88px 0;
    }

    .compliance-card {
      background-color: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-dark);
      border-radius: var(--card-radius);
      padding: 30px;
      height: 100%;
      transition: border-color 0.3s;
    }

    .compliance-card:hover {
      border-color: var(--accent-color);
    }

    /* Section 6: 案例瀑布流 */
    .case-card {
      background-color: var(--bg-white);
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    /* Section 7: 关键数据条 */
    #metrics {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      color: #FFFFFF;
      padding: 60px 0;
    }

    .metric-item {
      text-align: center;
      padding: 10px;
      position: relative;
    }

    .metric-value {
      font-size: 2.75rem;
      font-weight: 800;
      color: #38BDF8;
      line-height: 1.2;
      margin-bottom: 6px;
    }

    .metric-label {
      font-size: 0.95rem;
      color: #94A3B8;
    }

    /* Section 8: 评价墙 */
    .testimonial-card {
      background-color: var(--bg-white);
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .quote-icon {
      font-size: 1.75rem;
      color: #CBD5E1;
      margin-bottom: 12px;
    }

    /* Section 9: 资讯列表 */
    .insight-card {
      background: var(--bg-white);
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      height: 100%;
      display: flex;
      flex-direction: column;
    }

    .insight-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    /* Section 10: FAQ 手风琴定制 */
    .accordion-custom .accordion-item {
      background: transparent;
      border: none;
      border-bottom: 1px solid var(--border-color);
      margin-bottom: 8px;
    }

    .accordion-custom .accordion-button {
      background: transparent;
      box-shadow: none !important;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--text-main);
      padding: 20px 0;
    }

    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--accent-color);
    }

    .accordion-custom .accordion-body {
      padding: 0 0 20px 0;
      color: var(--text-body);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    /* Section 11: 合作伙伴 */
    .partner-logo-box {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 20px 10px;
      text-align: center;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
      filter: grayscale(100%);
      opacity: 0.7;
      transition: all 0.3s;
    }

    .partner-logo-box:hover {
      filter: grayscale(0%);
      opacity: 1;
      color: var(--accent-color);
      border-color: var(--accent-color);
    }

    /* Section 12: 咨询与服务接入表单 */
    .contact-form-box {
      background: var(--bg-white);
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .form-control-custom, .form-select-custom {
      border: 1px solid #CBD5E1;
      border-radius: 6px;
      padding: 12px 14px;
      font-size: 0.95rem;
      width: 100%;
      margin-bottom: 16px;
      transition: border-color 0.2s;
    }

    .form-control-custom:focus, .form-select-custom:focus {
      outline: none;
      border-color: var(--accent-color);
      box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
    }

    /* 页脚 */
    .app-footer {
      background-color: var(--bg-white);
      border-top: 1px solid var(--border-color);
      padding: 40px 0 30px 0;
      color: var(--text-muted);
      font-size: 0.88rem;
    }

    /* 移动端响应式断点 */
    @media (max-width: 991.98px) {
      .app-sidebar {
        display: none;
      }
      .app-main-viewport {
        margin-left: 0;
      }
      .mobile-header {
        display: flex;
      }
      .hero-banner-card {
        padding: 40px 24px;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .metric-item {
        margin-bottom: 24px;
      }
    }