/* roulang page: index */
:root {
      --primary: #00F2FE;
      --secondary: #00E599;
      --bg-main: #0B0E14;
      --bg-panel: #12161F;
      --bg-card: #181D27;
      --text-main: #FFFFFF;
      --text-sub: #94A3B8;
      --text-dim: #64748B;
      --border-color: #1E293B;
    }
    body {
      font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .neon-border {
      border: 1px solid rgba(0, 242, 254, 0.2);
    }
    .neon-border:hover {
      border-color: rgba(0, 242, 254, 0.6);
      box-shadow: 0 0 20px rgba(0, 242, 254, 0.15);
    }
    .bg-glass {
      background: rgba(18, 22, 31, 0.75);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    .text-gradient {
      background: linear-gradient(135deg, #00F2FE 0%, #00E599 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .countdown-box {
      background: rgba(0, 242, 254, 0.05);
      border: 1px solid rgba(0, 242, 254, 0.25);
    }
    /* 平滑折叠过渡 */
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }