/* roulang page: index */
/* 基础重置与设计变量补充 */
    :root {
      --brand-deep: #1A3C5E;
      --brand-gold: #C8963E;
      --brand-gold-hover: #B07D2E;
      --bg-light: #F8FAFC;
      --card-bg: #FFFFFF;
      --dark-section: #0F2A45;
      --border-light: #E9EEF3;
      --text-heading: #0B1E33;
      --text-body: #3A4A5C;
      --text-muted: #6B7B8D;
      --footer-bg: #0B1E33;
      --footer-text: #B0C4D8;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.75;
      margin: 0;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    
    /* 导航栏过渡 */
    .navbar {
      transition: background-color 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
    }
    .navbar-scrolled {
      background-color: rgba(255,255,255,0.95);
      backdrop-filter: blur(8px);
      box-shadow: 0 2px 12px rgba(26,60,94,0.08);
    }
    .nav-link {
      position: relative;
      transition: color 0.2s;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 3px;
      background-color: var(--brand-gold);
      transition: width 0.25s ease;
      border-radius: 2px;
    }
    .nav-link:hover::after,
    .nav-link.active::after {
      width: 100%;
    }
    
    /* 按钮与组件过渡 */
    .btn-primary {
      background-color: var(--brand-gold);
      color: white;
      border-radius: 8px;
      padding: 12px 28px;
      font-weight: 600;
      font-size: 15px;
      transition: all 0.25s ease;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
      box-shadow: 0 2px 6px rgba(200,150,62,0.2);
    }
    .btn-primary:hover {
      background-color: var(--brand-gold-hover);
      box-shadow: 0 4px 14px rgba(176,125,46,0.3);
      transform: translateY(-1px);
    }
    
    .btn-outline {
      background: transparent;
      color: var(--brand-deep);
      border: 1.5px solid var(--brand-deep);
      border-radius: 8px;
      padding: 12px 28px;
      font-weight: 600;
      font-size: 15px;
      transition: all 0.25s ease;
      display: inline-block;
      text-align: center;
      cursor: pointer;
    }
    .btn-outline:hover {
      background-color: rgba(26,60,94,0.08);
      border-color: var(--brand-deep);
      transform: translateY(-1px);
    }
    
    .card-hover {
      transition: all 0.3s ease;
      background: white;
      border-radius: 12px;
      box-shadow: 0 2px 12px rgba(26,60,94,0.06);
    }
    .card-hover:hover {
      box-shadow: 0 8px 24px rgba(26,60,94,0.12);
      transform: translateY(-4px);
    }
    
    /* FAQ 手风琴动画 */
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 12px;
      padding-bottom: 8px;
    }
    .faq-icon {
      transition: transform 0.3s ease;
      color: var(--brand-gold);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    
    /* 瀑布流列 */
    .masonry-columns {
      column-count: 3;
      column-gap: 20px;
    }
    @media (max-width: 768px) {
      .masonry-columns {
        column-count: 2;
      }
    }
    @media (max-width: 480px) {
      .masonry-columns {
        column-count: 1;
      }
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 20px;
    }
    
    /* 自定义滚动条 */
    ::-webkit-scrollbar {
      width: 6px;
    }
    ::-webkit-scrollbar-track {
      background: #f1f1f1;
    }
    ::-webkit-scrollbar-thumb {
      background: #c1c1c1;
      border-radius: 3px;
    }