/* roulang page: index */
:root {
      --primary: #1A3A5C;
      --accent: #C8A96E;
      --accent-hover: #B28B4B;
      --bg: #F7F5F2;
      --card-bg: #FFFFFF;
      --text-primary: #2C3E50;
      --text-secondary: #5D6D7E;
      --border-light: #E0DBD1;
      --shadow-sm: 0 2px 16px rgba(26,58,92,0.06);
      --shadow-md: 0 8px 32px rgba(26,58,92,0.12);
      --radius-md: 12px;
      --radius-sm: 8px;
      --radius-pill: 20px;
      --transition: 0.25s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
      background-color: var(--bg);
      color: var(--text-primary);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    h1, h2, h3, h4 {
      font-weight: 600;
      color: var(--primary);
    }
    h1 {
      font-size: 38px;
      line-height: 1.2;
      font-weight: 700;
    }
    h2 {
      font-size: 28px;
      line-height: 1.3;
    }
    h3 {
      font-size: 20px;
      line-height: 1.4;
      color: var(--text-primary);
    }
    .section-padding {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      .section-padding {
        padding: 60px 0;
      }
      h1 {
        font-size: 28px;
      }
      h2 {
        font-size: 22px;
      }
    }
    /* 导航栏 */
    .navbar {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(247,245,242,0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
    }
    .logo-text {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
    }
    .logo-dot {
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
      display: inline-block;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-primary);
      text-decoration: none;
      position: relative;
      padding: 4px 0;
      transition: color 0.2s;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent);
      transition: width 0.2s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .search-box {
      display: flex;
      align-items: center;
      background: #FFFFFF;
      border: 1px solid #D1CFC9;
      border-radius: var(--radius-pill);
      padding: 6px 16px;
      width: 180px;
      transition: width 0.25s ease, border-color 0.25s;
      margin-right: 12px;
    }
    .search-box i {
      color: #5D6D7E;
      font-size: 14px;
      margin-right: 8px;
    }
    .search-box input {
      border: none;
      outline: none;
      background: transparent;
      font-size: 14px;
      color: var(--text-primary);
      width: 100%;
    }
    .search-box input::placeholder {
      color: #A0A8B0;
    }
    .search-box:focus-within {
      width: 220px;
      border-color: var(--primary);
    }
    .btn-primary {
      background: var(--accent);
      color: #FFFFFF;
      font-weight: 600;
      font-size: 16px;
      padding: 8px 20px;
      border-radius: var(--radius-pill);
      border: none;
      cursor: pointer;
      transition: background 0.25s, box-shadow 0.25s;
      text-decoration: none;
      display: inline-block;
      box-shadow: 0 4px 12px rgba(200,169,110,0.4);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      box-shadow: 0 6px 18px rgba(200,169,110,0.55);
    }
    .btn-secondary {
      background: transparent;
      color: var(--primary);
      border: 1px solid var(--primary);
      font-weight: 600;
      font-size: 16px;
      padding: 8px 20px;
      border-radius: var(--radius-pill);
      cursor: pointer;
      transition: all 0.25s;
      text-decoration: none;
      display: inline-block;
    }
    .btn-secondary:hover {
      background: var(--primary);
      color: #FFFFFF;
    }
    .hamburger {
      display: none;
      font-size: 24px;
      color: var(--primary);
      background: none;
      border: none;
      cursor: pointer;
    }
    @media (max-width: 1024px) {
      .nav-links, .search-box, .btn-primary.nav-cta {
        display: none;
      }
      .hamburger {
        display: block;
      }
    }
    /* 卡片 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      padding: 32px;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      height: 100%;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    /* 背景纹理 */
    .bg-grid {
      background-image: radial-gradient(#E0DBD1 0.5px, transparent 0.5px);
      background-size: 40px 40px;
    }
    @media (max-width: 768px) {
      .bg-grid {
        background-image: none;
      }
    }
    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 0;
      cursor: pointer;
      font-weight: 600;
      font-size: 20px;
      color: var(--primary);
      position: relative;
      padding-left: 16px;
    }
    .faq-question::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 20px;
      background: var(--accent);
      border-radius: 2px;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: var(--text-primary);
      font-size: 15px;
      padding: 0 16px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }
    .faq-arrow {
      transition: transform 0.3s ease;
      color: var(--accent);
    }
    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }
    /* 瀑布流 */
    .masonry {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 0;
    }
    .masonry .card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      border-radius: var(--radius-sm);
      transition: transform 0.3s;
    }
    .masonry .card:hover img {
      transform: scale(1.03);
    }
    @media (max-width: 1024px) {
      .masonry {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 640px) {
      .masonry {
        grid-template-columns: 1fr;
      }
    }
    .tag {
      background: #F0EDE8;
      color: #5D6D7E;
      font-size: 11px;
      padding: 4px 10px;
      border-radius: 20px;
      display: inline-block;
    }
    .plan-highlight {
      border: 2px solid var(--accent);
      background: #FBF8F2;
      position: relative;
    }
    .recommend-badge {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--accent);
      color: white;
      font-size: 11px;
      padding: 4px 12px;
      border-radius: 4px;
      font-weight: 600;
    }
    footer {
      background: #2C3E50;
      color: #B0BEC5;
    }
    footer a {
      color: #B0BEC5;
      text-decoration: none;
      transition: color 0.2s;
    }
    footer a:hover {
      color: var(--accent);
    }