/* roulang page: index */
:root {
      --primary: #00E676;
      --primary-dark: #004D40;
      --accent: #FF6D00;
      --accent-blue: #2979FF;
      --bg-dark: #0D1117;
      --bg-card: #161B22;
      --text-main: #FFFFFF;
      --text-muted: #8B949E;
      --text-body: #E6EDF3;
      --border-color: rgba(0, 230, 118, 0.18);
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-body);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      scroll-behavior: smooth;
    }

    .font-num {
      font-family: "DIN Alternate", "Impact", "Teko", sans-serif;
    }

    .neon-border {
      border: 1px solid var(--border-color);
      box-shadow: 0 0 15px rgba(0, 230, 118, 0.08);
    }

    .neon-border-hover:hover {
      border-color: rgba(0, 230, 118, 0.5);
      box-shadow: 0 0 25px rgba(0, 230, 118, 0.2);
    }

    .neon-glow-btn {
      box-shadow: 0 0 20px rgba(0, 230, 118, 0.35);
      transition: all 0.3s ease;
    }

    .neon-glow-btn:hover {
      box-shadow: 0 0 30px rgba(0, 230, 118, 0.65);
      transform: translateY(-2px);
    }

    /* 抽屉导航过渡 */
    #side-drawer {
      transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* 手风琴过渡样式 */
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, opacity 0.3s ease;
      opacity: 0;
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      opacity: 1;
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }