/* roulang page: index */
/* 基础重置与设计变量补充 */
    :root {
      --primary: #0A2540;
      --accent: #F6B100;
      --accent-hover: #E09E00;
      --bg-light: #F8FAFC;
      --text-title: #1E293B;
      --text-body: #475569;
      --text-soft: #64748B;
      --border-light: #E2E8F0;
      --success: #059669;
      --card-bg: #FFFFFF;
      --shadow-card: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 12px 28px rgba(0,0,0,0.08);
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
      color: #475569;
      background-color: #F8FAFC;
      line-height: 1.625;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    /* 导航 */
    .navbar {
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid #E2E8F0;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 50;
    }
    .nav-link {
      font-size: 0.875rem;
      color: #475569;
      font-weight: 500;
      padding: 0.5rem 0.75rem;
      border-radius: 6px;
      transition: all 0.2s;
    }
    .nav-link:hover {
      color: #0A2540;
      background-color: #F8FAFC;
    }
    .logo-text {
      font-weight: 800;
      font-size: 1.5rem;
      color: #0A2540;
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
    }
    .logo-diamond {
      display: inline-block;
      width: 10px;
      height: 10px;
      background: #F6B100;
      transform: rotate(45deg);
      margin-right: 10px;
    }
    .btn-primary {
      background-color: #F6B100;
      color: #0A2540;
      font-weight: 600;
      border-radius: 8px;
      padding: 0.625rem 1.5rem;
      transition: all 0.25s;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      font-size: 0.95rem;
    }
    .btn-primary:hover {
      background-color: #E09E00;
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(246,177,0,0.25);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid #0A2540;
      color: #0A2540;
      font-weight: 600;
      border-radius: 8px;
      padding: 0.625rem 1.5rem;
      transition: all 0.25s;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-outline:hover {
      background-color: rgba(10,37,64,0.05);
      border-color: #0A2540;
    }
    .status-tag {
      background-color: #E8F5E9;
      color: #059669;
      font-size: 0.75rem;
      font-weight: 600;
      border-radius: 20px;
      padding: 0.2rem 0.8rem;
      margin-left: 12px;
    }
    /* 卡片悬停 */
    .card-hover {
      transition: all 0.25s ease;
    }
    .card-hover:hover {
      transform: translateY(-6px);
      box-shadow: 0 12px 28px rgba(0,0,0,0.08);
    }
    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid #E2E8F0;
    }
    .faq-question {
      cursor: pointer;
      font-weight: 700;
      font-size: 1.125rem;
      color: #1E293B;
      padding: 1.25rem 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: #475569;
      padding-bottom: 0;
      font-size: 1rem;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 1.25rem;
    }
    .faq-icon {
      transition: transform 0.3s ease;
      font-size: 1.5rem;
      color: #64748B;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: #F6B100;
    }
    /* 移动端汉堡菜单 */
    @media (max-width: 768px) {
      .desktop-nav {
        display: none;
      }
      .mobile-menu-btn {
        display: flex;
      }
      .mobile-nav {
        display: none;
        flex-direction: column;
        background: white;
        border-top: 1px solid #E2E8F0;
        padding: 1rem;
      }
      .mobile-nav.open {
        display: flex;
      }
    }
    @media (min-width: 769px) {
      .mobile-menu-btn {
        display: none;
      }
      .mobile-nav {
        display: none;
      }
    }
    /* 触摸优化 */
    button, .btn-primary, .btn-outline, .nav-link {
      min-height: 44px;
      min-width: 44px;
    }
    .nav-link {
      display: inline-flex;
      align-items: center;
    }