/* roulang page: index */
:root {
      --primary: #7C3AED;
      --accent: #06D6A0;
      --bg: #0B0E17;
      --card: rgba(15,23,42,0.85);
      --text: #F1F5F9;
      --muted: #94A3B8;
      --border: rgba(6,214,160,0.25);
      --glow: 0 0 18px rgba(6,214,160,0.25);
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      background-color: #0B0E17;
      color: #F1F5F9;
      line-height: 1.6;
      margin: 0;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    @media (min-width: 768px) {
      .container-custom {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }
    /* 霓虹下划线动画 */
    .nav-link {
      position: relative;
      transition: color 0.3s;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -4px;
      width: 0%;
      height: 2px;
      background: #06D6A0;
      box-shadow: 0 0 12px #06D6A0;
      transition: width 0.3s ease;
    }
    .nav-link:hover::after,
    .nav-link.active::after {
      width: 100%;
    }
    .glow-card {
      transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s;
      border: 1px solid rgba(6,214,160,0.25);
      background: rgba(15,23,42,0.8);
      backdrop-filter: blur(6px);
      border-radius: 1.25rem;
      box-shadow: 0 8px 20px rgba(0,0,0,0.6);
    }
    .glow-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 0 28px rgba(6,214,160,0.35);
      border-color: #06D6A0;
    }
    .btn-primary {
      background: #06D6A0;
      color: #0B0E17;
      font-weight: 700;
      border-radius: 9999px;
      padding: 0.75rem 2rem;
      transition: filter 0.2s, box-shadow 0.2s;
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      filter: brightness(1.15);
      box-shadow: 0 0 22px #06D6A0;
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid #06D6A0;
      color: #06D6A0;
      font-weight: 600;
      border-radius: 9999px;
      padding: 0.7rem 1.9rem;
      transition: background 0.2s, color 0.2s, box-shadow 0.2s;
    }
    .btn-outline:hover {
      background: rgba(6,214,160,0.1);
      box-shadow: 0 0 16px #06D6A0;
      color: #ffffff;
    }
    .accent-glow-text {
      text-shadow: 0 0 10px rgba(6,214,160,0.7);
    }
    .hamburger-line {
      display: block;
      width: 24px;
      height: 2px;
      background: #F1F5F9;
      margin: 5px 0;
      transition: 0.3s;
    }
    .mobile-menu {
      background: rgba(11,14,23,0.96);
      backdrop-filter: blur(20px);
      transform: translateX(100%);
      transition: transform 0.3s ease;
    }
    .mobile-menu.open {
      transform: translateX(0);
    }
    input, textarea {
      background: #1E293B;
      border: 1px solid #334155;
      border-radius: 0.9rem;
      padding: 0.75rem 1rem;
      color: white;
      transition: border 0.2s, box-shadow 0.2s;
      width: 100%;
    }
    input:focus, textarea:focus {
      outline: none;
      border-color: #06D6A0;
      box-shadow: 0 0 0 3px rgba(6,214,160,0.3);
    }
    .faq-item {
      border-bottom: 1px solid rgba(6,214,160,0.2);
      padding: 1rem 0;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.2s;
      color: #CBD5E1;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 0.8rem;
      padding-bottom: 0.8rem;
    }
    .faq-item.active .faq-icon {
      color: #06D6A0;
      transform: rotate(45deg);
    }
    .timeline-dot::before {
      content: '';
      position: absolute;
      left: -6px;
      top: 6px;
      width: 10px;
      height: 10px;
      background: #06D6A0;
      border-radius: 50%;
      box-shadow: 0 0 12px #06D6A0;
    }
    @media (max-width: 767px) {
      .h1-responsive {
        font-size: 2.5rem;
        line-height: 1.2;
      }
      .btn-primary, .btn-outline {
        width: 100%;
        justify-content: center;
      }
    }