/* roulang page: index */
:root {
      --primary: #00E599;
      --secondary: #0A84FF;
      --bg-dark: #0A0D14;
      --surface-dark: #161B22;
      --text-main: #FFFFFF;
      --text-muted: #94A3B8;
      --border-color: rgba(0, 229, 153, 0.2);
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .slant-hero {
      clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
    }
    .neon-border {
      border: 1px solid rgba(0, 229, 153, 0.25);
      transition: all 0.3s ease;
    }
    .neon-border:hover {
      border-color: #00E599;
      box-shadow: 0 10px 30px rgba(0, 229, 153, 0.18);
      transform: translateY(-4px);
    }
    .glow-badge {
      background: rgba(0, 229, 153, 0.12);
      border: 1px solid rgba(0, 229, 153, 0.3);
      color: #00E599;
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
      width: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #00E599;
      border-radius: 3px;
    }
    .custom-scroll::-webkit-scrollbar-track {
      background: #161B22;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .faq-item.active .faq-answer {
      max-height: 250px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }