/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');

    :root {
      --primary: #1A3A5C;
      --primary-hover: #15304A;
      --primary-light: #EBF0F5;
      --accent: #C49A2B;
      --bg: #F7F9FC;
      --card-bg: #FFFFFF;
      --text: #2C3E50;
      --text-secondary: #5D6D7E;
      --border: #E1E8EF;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-card: 0 4px 20px rgba(26, 58, 92, 0.06);
      --shadow-card-hover: 0 8px 28px rgba(26, 58, 92, 0.1);
      --font-title: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: var(--font-title);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      padding-bottom: 80px; /* 移动端底部导航留白 */
    }

    @media (min-width: 769px) {
      body {
        padding-bottom: 0;
      }
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }

    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 桌面导航 */
    .desktop-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 64px;
      background: #fff;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
      z-index: 50;
      display: flex;
      align-items: center;
    }

    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--primary);
    }

    .logo-icon {
      font-size: 1.8rem;
      color: var(--accent);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      font-weight: 500;
      color: var(--text);
    }

    .nav-links a:hover {
      color: var(--primary);
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      border: none;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: background 0.2s ease;
      display: inline-block;
      cursor: pointer;
      font-size: 0.95rem;
    }

    .btn-primary:hover {
      background: var(--primary-hover);
    }

    .btn-outline {
      background: transparent;
      color: var(--primary);
      border: 1px solid var(--primary);
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.2s ease;
      display: inline-block;
      font-size: 0.95rem;
    }

    .btn-outline:hover {
      background: var(--primary-light);
    }

    /* 移动端底部导航 */
    .mobile-tab-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 64px;
      background: #fff;
      border-top: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-around;
      z-index: 50;
      box-shadow: 0 -2px 10px rgba(0,0,0,0.04);
    }

    .tab-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 4px;
      font-size: 0.7rem;
      color: #5D6D7E;
      transition: color 0.2s;
      font-weight: 500;
    }

    .tab-item i {
      font-size: 1.4rem;
    }

    .tab-item.active {
      color: var(--primary);
    }

    @media (min-width: 769px) {
      .mobile-tab-bar {
        display: none;
      }
    }

    /* 板块间距 */
    section {
      padding: 80px 0;
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 16px;
      font-family: var(--font-title);
    }

    .section-subtitle {
      font-size: 1.1rem;
      color: var(--text-secondary);
      margin-bottom: 40px;
    }

    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: box-shadow 0.25s ease;
    }

    .card:hover {
      box-shadow: var(--shadow-card-hover);
    }

    @media (max-width: 768px) {
      .card {
        padding: 24px;
      }
    }

    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid var(--border);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      background: transparent;
      border: none;
      padding: 20px 0;
      font-weight: 600;
      font-size: 1.1rem;
      color: var(--text);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      transition: color 0.2s;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #F7F9FC;
      padding: 0 20px;
      margin-bottom: 4px;
      border-radius: 6px;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 20px;
    }

    .faq-item.active .faq-question {
      color: var(--primary);
    }

    .footer {
      background: var(--primary);
      color: rgba(255,255,255,0.85);
      padding: 40px 0 20px;
      font-size: 0.95rem;
    }

    .footer a {
      color: rgba(255,255,255,0.7);
    }

    .footer a:hover {
      color: white;
    }