/* roulang page: index */
:root {
      --primary: #F1502F;
      --secondary: #1E1E24;
      --warm: #FDFBF7;
      --accent: #FFC107;
      --muted: #4A4A55;
      --radius-xl: 24px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--warm);
      color: var(--muted);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    button, input {
      font-family: inherit;
    }

    .btn-primary {
      background-color: var(--primary);
      color: white;
      border-radius: 9999px;
      padding: 0.875rem 2.2rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s ease;
      border: 2px solid transparent;
      box-shadow: 0 10px 15px -3px rgba(241, 80, 47, 0.2);
      letter-spacing: 0.5px;
    }
    .btn-primary:hover {
      background-color: #d94428;
      transform: scale(1.02);
      box-shadow: 0 15px 25px -5px rgba(241, 80, 47, 0.3);
    }

    .btn-ghost {
      background: transparent;
      color: var(--primary);
      border: 2px solid var(--primary);
      border-radius: 9999px;
      padding: 0.875rem 2.2rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s ease;
    }
    .btn-ghost:hover {
      background-color: var(--primary);
      color: white;
      transform: scale(1.02);
    }

    .card {
      background: white;
      border-radius: 24px;
      padding: 2rem;
      box-shadow: 0 20px 35px -8px rgba(241, 80, 47, 0.06);
      transition: all 0.3s ease;
      border: 1px solid rgba(0,0,0,0.02);
    }
    .card:hover {
      transform: translateY(-6px);
      box-shadow: 0 30px 45px -12px rgba(241, 80, 47, 0.12);
      border-color: rgba(241, 80, 47, 0.15);
    }

    .section-padding {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }
    @media (min-width: 768px) {
      .section-padding {
        padding-top: 7rem;
        padding-bottom: 7rem;
      }
    }

    .container-main {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* 导航优化 */
    .nav-link {
      position: relative;
      font-weight: 500;
      color: var(--secondary);
      transition: color 0.2s;
      padding: 0.5rem 0;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary);
      transition: width 0.3s;
    }
    .nav-link:hover::after {
      width: 100%;
    }

    /* 汉堡菜单动画 */
    .mobile-menu {
      transition: all 0.3s ease;
      opacity: 0;
      transform: translateY(-10px);
      pointer-events: none;
    }
    .mobile-menu.open {
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
    }

    details summary {
      list-style: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: var(--secondary);
      padding: 1rem 0;
      border-bottom: 1px solid #e5e7eb;
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary {
      color: var(--primary);
    }
    details .faq-content {
      padding: 1rem 0 1.5rem;
      color: var(--muted);
    }

    /* 背景装饰 */
    .hero-bg-glow {
      background: radial-gradient(circle at 10% 20%, rgba(241,80,47,0.04) 0%, transparent 60%);
    }

    .accent-dot {
      background-color: var(--accent);
      width: 8px;
      height: 8px;
      border-radius: 50%;
      display: inline-block;
    }