/* roulang page: index */
:root {
      --primary-coral: #FF5A5F;
      --primary-purple: #6C5CE7;
      --dark-base: #0F0E17;
      --card-dark: #1A162B;
      --bg-light: #F8F9FD;
      --text-main: #1E293B;
      --text-muted: #64748B;
    }
    html, body {
      font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
      background-color: #F8F9FD;
      color: var(--text-main);
      line-height: 1.75;
      overflow-x: hidden;
      margin: 0;
      padding: 0;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(108, 92, 231, 0.15) 0%, rgba(255, 90, 95, 0.08) 45%, transparent 70%);
    }
    .neon-border-hover {
      transition: all 0.3s ease;
    }
    .neon-border-hover:hover {
      border-color: rgba(108, 92, 231, 0.4);
      box-shadow: 0 10px 25px -5px rgba(108, 92, 231, 0.12), 0 8px 10px -6px rgba(255, 90, 95, 0.08);
      transform: translateY(-3px);
    }
    .glass-dark {
      background: rgba(26, 22, 43, 0.75);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.08);
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, opacity 0.3s ease-out;
      opacity: 0;
    }
    .faq-item.active .faq-content {
      max-height: 240px;
      opacity: 1;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }