/* roulang page: index */
:root {
      --color-primary: #00FF88;
      --color-cyan: #00E5FF;
      --bg-dark: #080A0F;
      --bg-card: #161B22;
      --border-color: rgba(255, 255, 255, 0.08);
      --text-main: #F0F6FC;
      --text-muted: #8B949E;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
    }
    .glow-border {
      border: 1px solid var(--border-color);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .glow-border:hover {
      border-color: rgba(0, 255, 136, 0.4);
      box-shadow: 0 0 24px rgba(0, 255, 136, 0.12);
    }
    .text-gradient {
      background: linear-gradient(135deg, #F0F6FC 30%, #00FF88 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .text-cyan-gradient {
      background: linear-gradient(135deg, #00E5FF 0%, #00FF88 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-bg {
      background: linear-gradient(to bottom, rgba(8, 10, 15, 0.75), rgba(8, 10, 15, 0.95)), url('/assets/images/a90512403e55b109.webp') center/cover no-repeat;
    }
    .section-pattern {
      background-color: #0B0E14;
      background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
      background-size: 24px 24px;
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary .faq-icon {
      transform: rotate(180deg);
      color: #00FF88;
    }