/* roulang page: index */
:root {
      --bg-dark: #060B16;
      --bg-deep: #0B132B;
      --card-bg: rgba(16, 26, 54, 0.72);
      --accent-blue: #0066FF;
      --accent-cyan: #00F2FE;
      --border-glow: rgba(0, 242, 254, 0.2);
    }
    body {
      background-color: var(--bg-dark);
      color: #E2E8F0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .glow-btn {
      background: linear-gradient(135deg, #0066FF 0%, #00d2ff 100%);
      box-shadow: 0 0 20px rgba(0, 102, 255, 0.45);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glow-btn:hover {
      box-shadow: 0 0 30px rgba(0, 242, 254, 0.75);
      transform: translateY(-2px);
    }
    .glass-panel {
      background: var(--card-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-glow);
    }
    .glass-card {
      background: rgba(16, 26, 54, 0.65);
      backdrop-filter: blur(14px);
      border: 1px solid rgba(0, 242, 254, 0.15);
      transition: all 0.35s ease;
    }
    .glass-card:hover {
      border-color: rgba(0, 242, 254, 0.5);
      transform: translateY(-5px);
      box-shadow: 0 12px 30px rgba(0, 102, 255, 0.25);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
    }
    .accordion-item.active .accordion-content {
      max-height: 240px;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }
    .custom-scroll::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: rgba(0, 242, 254, 0.25);
      border-radius: 4px;
    }