/* roulang page: index */
:root {
      --bg-main: #0A0F1D;
      --bg-card: rgba(17, 24, 39, 0.75);
      --bg-surface: #111827;
      --accent-cyan: #00F2FE;
      --accent-blue: #4FACFE;
      --text-primary: #F3F4F6;
      --text-muted: #9CA3AF;
      --border-glass: rgba(255, 255, 255, 0.08);
      --glow-cyan: 0 0 20px rgba(0, 242, 254, 0.35);
      --radius-card: 16px;
      --radius-pill: 9999px;
      --radius-btn: 8px;
    }

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

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

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

    /* 顶部辅助条 */
    .top-bar {
      background-color: rgba(10, 15, 29, 0.95);
      border-bottom: 1px solid var(--border-glass);
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .status-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: #10B981;
      box-shadow: 0 0 8px #10B981;
      margin-right: 6px;
    }

    /* 主导航 */
    .main-nav {
      background: rgba(17, 24, 39, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-glass);
      position: sticky;
      top: 0;
      z-index: 1030;
    }
    .brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      background: linear-gradient(90deg, #FFFFFF, var(--accent-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .nav-link {
      color: var(--text-muted) !important;
      font-size: 0.92rem;
      font-weight: 500;
      padding: 0.5rem 0.85rem !important;
      transition: color 0.2s;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--accent-cyan) !important;
    }

    /* 发光与渐变按钮 */
    .btn-glow {
      background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
      color: #0A0F1D !important;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-btn);
      padding: 0.65rem 1.4rem;
      box-shadow: var(--glow-cyan);
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(0, 242, 254, 0.65);
      transform: translateY(-2px);
      color: #000 !important;
    }
    .btn-outline-glow {
      background: transparent;
      color: var(--accent-cyan) !important;
      font-weight: 600;
      border: 1px solid var(--accent-cyan);
      border-radius: var(--radius-btn);
      padding: 0.65rem 1.4rem;
      transition: all 0.3s ease;
    }
    .btn-outline-glow:hover {
      background: rgba(0, 242, 254, 0.1);
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.25);
      transform: translateY(-2px);
    }

    /* 玻璃拟态卡片与边框 */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-card);
      padding: 1.75rem;
      transition: all 0.3s ease;
    }
    .glass-card:hover {
      border-color: rgba(0, 242, 254, 0.3);
      transform: translateY(-4px);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
    }

    .badge-pill {
      border-radius: var(--radius-pill);
      padding: 0.35rem 0.85rem;
      font-size: 0.78rem;
      font-weight: 600;
      letter-spacing: 0.5px;
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }
    .badge-live {
      background: rgba(239, 68, 68, 0.15);
      border: 1px solid rgba(239, 68, 68, 0.4);
      color: #F87171;
    }
    .badge-tech {
      background: rgba(0, 242, 254, 0.12);
      border: 1px solid rgba(0, 242, 254, 0.3);
      color: var(--accent-cyan);
    }

    /* 板块结构基准 */
    .app-section {
      padding: 5.5rem 0;
      position: relative;
    }
    .section-alt {
      background: #0d1424;
      border-top: 1px solid var(--border-glass);
      border-bottom: 1px solid var(--border-glass);
    }
    .section-header {
      margin-bottom: 3.5rem;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 0.85rem;
    }
    .section-desc {
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto;
      font-size: 1.05rem;
      line-height: 1.7;
    }

    /* 闪购/限时首屏条 */
    .flash-sale-bar {
      background: linear-gradient(90deg, #1E1B4B, #0F172A);
      border: 1px solid rgba(79, 172, 254, 0.3);
      border-radius: 12px;
      padding: 0.85rem 1.5rem;
      margin-bottom: 2rem;
    }
    .countdown-timer span {
      background: rgba(0, 0, 0, 0.4);
      padding: 4px 8px;
      border-radius: 4px;
      font-family: monospace;
      font-size: 1.1rem;
      color: var(--accent-cyan);
      font-weight: bold;
      border: 1px solid var(--border-glass);
    }

    /* 表格风格组件 */
    .table-dark-custom {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0 8px;
    }
    .table-dark-custom tr {
      background: var(--bg-surface);
      border: 1px solid var(--border-glass);
      border-radius: 8px;
      transition: background 0.2s;
    }
    .table-dark-custom tr:hover {
      background: rgba(30, 41, 59, 0.8);
    }
    .table-dark-custom td, .table-dark-custom th {
      padding: 1.1rem 1.25rem;
      vertical-align: middle;
      border: none;
    }
    .table-dark-custom th {
      color: var(--text-muted);
      font-weight: 500;
      font-size: 0.9rem;
    }

    /* 手风琴改造 */
    .accordion-item {
      background: var(--bg-card) !important;
      border: 1px solid var(--border-glass) !important;
      border-radius: 12px !important;
      margin-bottom: 1rem;
      overflow: hidden;
    }
    .accordion-button {
      background: transparent !important;
      color: #FFFFFF !important;
      font-weight: 600;
      font-size: 1.05rem;
      padding: 1.25rem 1.5rem;
      box-shadow: none !important;
    }
    .accordion-button:not(.collapsed) {
      color: var(--accent-cyan) !important;
      border-bottom: 1px solid var(--border-glass);
    }
    .accordion-button::after {
      filter: invert(1);
    }
    .accordion-body {
      color: var(--text-muted);
      line-height: 1.7;
      padding: 1.25rem 1.5rem;
    }

    /* 页脚 */
    .site-footer {
      background: #060913;
      border-top: 1px solid var(--border-glass);
      padding: 4.5rem 0 2rem;
      font-size: 0.92rem;
      color: var(--text-muted);
    }
    .footer-heading {
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .footer-links li {
      margin-bottom: 0.65rem;
      list-style: none;
    }
    .footer-links a:hover {
      color: var(--accent-cyan);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-glass);
      padding-top: 2rem;
      margin-top: 3.5rem;
      font-size: 0.85rem;
    }