/* roulang page: index */
/* 基础重置与设计变量 */
    :root {
      --plum: #C0265E;
      --plum-light: #FDF2F5;
      --carbon: #1A1A1E;
      --gold: #D4A843;
      --ice: #F5F5F7;
      --soft-text: #3A3A3E;
      --muted: #6A6A72;
      --line: #E8E8EC;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, -apple-system, sans-serif;
      background-color: #F9F9FA;
      color: #3A3A3E;
      line-height: 1.75;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }
    /* 自定义滚动条与动画 */
    .fade-in-up {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    }
    .fade-in-up.visible {
      opacity: 1;
      transform: translateY(0);
    }
    /* 数字动画样式 */
    .count-up {
      font-feature-settings: "tnum";
      font-weight: 700;
      color: #D4A843;
    }
    /* 导航阴影过渡 */
    #mainNav {
      transition: box-shadow 0.3s ease;
    }
    /* FAQ 箭头旋转 */
    .faq-arrow {
      transition: transform 0.3s ease;
    }
    details[open] .faq-arrow {
      transform: rotate(180deg);
    }
    /* 按钮动效 */
    .btn-primary {
      background-color: #C0265E;
      color: white;
      border-radius: 10px;
      padding: 14px 32px;
      font-weight: 600;
      display: inline-block;
      text-align: center;
      transition: all 0.25s ease;
      box-shadow: 0 4px 10px rgba(192,38,94,0.2);
    }
    .btn-primary:hover {
      filter: brightness(1.1);
      box-shadow: 0 6px 18px rgba(192,38,94,0.35);
      transform: scale(1.03);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid #C0265E;
      color: #C0265E;
      border-radius: 10px;
      padding: 14px 32px;
      font-weight: 600;
      display: inline-block;
      transition: all 0.25s ease;
    }
    .btn-outline:hover {
      background-color: #FDF2F5;
      border-color: #C0265E;
      color: #C0265E;
      transform: scale(1.02);
    }
    .text-link {
      color: #C0265E;
      font-weight: 500;
      position: relative;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .text-link::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 1.5px;
      background: #C0265E;
      transition: width 0.3s ease;
    }
    .text-link:hover::after {
      width: 100%;
    }
    /* 卡片悬停效果 */
    .hover-card {
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.2s;
    }
    .hover-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 8px 24px rgba(0,0,0,0.10);
      border-color: #C0265E;
    }
    /* 移动端菜单 */
    @media (max-width: 767px) {
      .mobile-menu {
        display: none;
        position: fixed;
        top: 68px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 8px 20px rgba(0,0,0,0.08);
        z-index: 50;
      }
      .mobile-menu.open {
        display: flex;
      }
    }