/* roulang page: index */
:root {
      --primary: #0A6E5C;
      --primary-dark: #085849;
      --primary-light: rgba(10, 110, 92, 0.12);
      --secondary: #1E2B2C;
      --warm-bg: #F7F5F0;
      --text-primary: #1E2B2C;
      --text-secondary: #555;
      --border-light: #E5E5E5;
      --card-radius: 16px;
      --btn-radius: 30px;
      --input-radius: 10px;
      --section-gap: 100px;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.08);
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--warm-bg);
      color: var(--text-primary);
      line-height: 1.6;
      margin: 0;
      overflow-x: hidden;
    }

    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .navbar {
      background: white;
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 2px 12px rgba(0,0,0,0.02);
      position: sticky;
      top: 0;
      z-index: 50;
      transition: box-shadow 0.2s;
    }
    .navbar.scrolled {
      box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    }
    .logo-text {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary);
      letter-spacing: 0.5px;
    }
    .nav-link {
      color: #555;
      font-size: 0.95rem;
      font-weight: 500;
      transition: color 0.2s, border-bottom 0.2s;
      padding: 0.5rem 0.8rem;
      border-bottom: 2px solid transparent;
    }
    .nav-link:hover {
      color: var(--primary);
      border-bottom-color: var(--primary);
    }
    .search-box {
      border: 1px solid #DDD;
      border-radius: 20px;
      padding: 0.5rem 1rem;
      font-size: 0.9rem;
      transition: border-color 0.2s, box-shadow 0.2s;
    }
    .search-box:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(10,110,92,0.2);
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      border-radius: var(--btn-radius);
      padding: 0.6rem 1.6rem;
      font-weight: 600;
      transition: all 0.3s;
      border: none;
      cursor: pointer;
      white-space: nowrap;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 8px 18px rgba(10,110,92,0.25);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      border-radius: var(--btn-radius);
      padding: 0.6rem 1.6rem;
      font-weight: 600;
      transition: all 0.3s;
    }
    .btn-outline:hover {
      background: rgba(10,110,92,0.05);
    }

    /* 卡片基础 */
    .card-hover {
      background: white;
      border-radius: var(--card-radius);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s;
      position: relative;
      overflow: hidden;
    }
    .card-hover:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover), 0 0 0 1px rgba(10,110,92,0.2);
    }
    .card-hover::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      opacity: 0;
      transition: opacity 0.25s;
    }
    .card-hover:hover::after {
      opacity: 1;
    }

    .badge-stat {
      background: rgba(10,110,92,0.08);
      color: var(--primary);
      border-radius: 12px;
      padding: 0.2rem 1rem;
      font-weight: 700;
      font-size: 1.5rem;
      display: inline-flex;
      align-items: baseline;
      gap: 4px;
    }

    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid #EEE;
    }
    .faq-question {
      cursor: pointer;
      padding: 1.2rem 0.5rem;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 12px;
      transition: color 0.2s;
    }
    .faq-question i {
      transition: transform 0.3s, color 0.2s;
      color: #888;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      background: #FAFAFA;
      border-radius: 10px;
      margin-bottom: 0.5rem;
    }
    .faq-input:checked + .faq-question i {
      transform: rotate(90deg);
      color: var(--primary);
    }
    .faq-input:checked + .faq-question + .faq-answer {
      max-height: 200px;
      padding: 1rem 1.2rem;
    }

    /* 表单光晕 */
    .input-field {
      border: 1px solid #DDD;
      border-radius: var(--input-radius);
      padding: 0.8rem 1rem;
      width: 100%;
      transition: border 0.2s, box-shadow 0.2s;
    }
    .input-field:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 4px rgba(10,110,92,0.15);
    }

    /* 移动端汉堡 */
    .mobile-menu {
      display: none;
    }
    #menu-toggle {
      display: none;
    }
    @media (max-width: 768px) {
      .desktop-nav {
        display: none;
      }
      .mobile-menu {
        display: block;
      }
      .navbar .container-custom {
        flex-wrap: wrap;
      }
      #menu-toggle:checked ~ .mobile-nav {
        display: flex;
        flex-direction: column;
        width: 100%;
        background: white;
        padding: 1rem 0;
      }
      .mobile-nav {
        display: none;
      }
    }

    section {
      margin: var(--section-gap) 0;
    }
    @media (max-width: 768px) {
      :root {
        --section-gap: 70px;
      }
      h1 {
        font-size: 2.2rem !important;
      }
      h2 {
        font-size: 1.8rem !important;
      }
      .card-hover {
        border-radius: 12px;
      }
      .badge-stat {
        font-size: 1.2rem;
      }
    }