/* roulang page: index */
:root {
      --brand-green: #0E8C3A;
      --brand-deepgreen: #0B7530;
      --brand-lightgreen: #E8F5EC;
      --brand-dark: #1E1E1E;
      --brand-gold: #D4A843;
      --color-graybg: #F7F8FA;
      --color-white: #FFFFFF;
      --color-border: #E5E7EB;
      --color-muted: #B0B0B0;
      --color-lighttext: #6B7280;
      --shadow-card: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 12px 28px rgba(0,0,0,0.08);
      --radius-card: 16px;
      --radius-btn: 999px;
      --radius-img: 12px;
      --transition-smooth: 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
      background-color: #FFFFFF;
      color: #1E1E1E;
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

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

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

    button, input {
      font-family: inherit;
      outline: none;
      border: none;
    }

    /* 导航栏搜索框专用聚焦 */
    .search-input:focus {
      border-color: var(--brand-green);
      box-shadow: 0 0 0 3px rgba(14,140,58,0.1);
    }

    /* 手风琴动画辅助 */
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding-top: 16px;
      padding-bottom: 16px;
    }

    /* 导航滚动阴影预留 */
    .header-scrolled {
      box-shadow: 0 4px 18px rgba(0,0,0,0.06);
      backdrop-filter: blur(12px);
      background-color: rgba(255,255,255,0.92);
    }

    /* 按钮悬停微动 */
    .btn-hover-lift:hover {
      transform: translateY(-1px);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    /* 卡片悬浮 */
    .card-lift:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }