/* roulang page: index */
:root {
      --primary: #2C3E50;
      --accent: #C9A96E;
      --bg: #F7F8FA;
      --white: #FFFFFF;
      --heading: #1E2630;
      --body: #3A3F47;
      --muted: #6B7280;
      --border-light: #E5E7EB;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --radius-lg: 1rem;
      --radius-xl: 1.5rem;
      --transition: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, -apple-system, sans-serif;
      background-color: #F7F8FA;
      color: #3A3F47;
      line-height: 1.6;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    button, input, textarea {
      font-family: inherit;
    }
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    @media (min-width: 640px) {
      .container-custom {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }
    @media (min-width: 1024px) {
      .container-custom {
        padding-left: 2.5rem;
        padding-right: 2.5rem;
      }
    }
    /* 导航胶囊 */
    .nav-capsule {
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: 9999px;
      box-shadow: 0 8px 26px rgba(0,0,0,0.07);
      padding: 0.75rem 2rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: auto;
      max-width: 95%;
      margin: 0 auto;
    }
    .nav-link {
      font-weight: 500;
      font-size: 0.9rem;
      color: #3A3F47;
      padding: 0.4rem 0.8rem;
      transition: color 0.2s;
      white-space: nowrap;
    }
    .nav-link:hover {
      color: #C9A96E;
    }
    .mobile-menu {
      display: none;
    }
    @media (max-width: 768px) {
      .desktop-nav {
        display: none;
      }
      .mobile-menu {
        display: block;
      }
      .nav-capsule {
        padding: 0.5rem 1.5rem;
        justify-content: space-between;
      }
    }
    /* 卡片 */
    .card {
      background: #FFFFFF;
      border-radius: 1.5rem;
      box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
      transition: box-shadow 0.3s ease, transform 0.2s ease;
    }
    .card:hover {
      box-shadow: 0 20px 30px -10px rgba(0,0,0,0.1), 0 10px 15px -8px rgba(0,0,0,0.05);
      transform: translateY(-3px);
    }
    .btn-primary {
      background-color: #C9A96E;
      color: white;
      padding: 0.75rem 2rem;
      border-radius: 9999px;
      font-weight: 600;
      box-shadow: 0 8px 18px rgba(201,169,110,0.25);
      transition: all 0.2s ease;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 22px rgba(201,169,110,0.35);
      filter: brightness(1.05);
    }
    .btn-outline {
      border: 2px solid #2C3E50;
      color: #2C3E50;
      padding: 0.7rem 2rem;
      border-radius: 9999px;
      font-weight: 600;
      transition: all 0.2s;
      display: inline-block;
      background: transparent;
      cursor: pointer;
    }
    .btn-outline:hover {
      background-color: #2C3E50;
      color: white;
    }
    .section-padding {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }
    @media (min-width: 768px) {
      .section-padding {
        padding-top: 7rem;
        padding-bottom: 7rem;
      }
    }
    .accent-border {
      border-left: 4px solid #C9A96E;
      padding-left: 1.5rem;
    }
    .faq-item {
      border-bottom: 1px solid #E5E7EB;
      padding-bottom: 1.2rem;
      margin-bottom: 1.2rem;
    }
    .faq-question {
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 600;
      color: #1E2630;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: #4B5563;
    }
    .faq-answer.open {
      max-height: 200px;
      margin-top: 0.8rem;
    }
    .accent-dot::before {
      content: '';
      display: inline-block;
      width: 8px;
      height: 8px;
      background: #C9A96E;
      border-radius: 50%;
      margin-right: 10px;
    }