/* roulang page: index */
:root {
      --deep-wood: #3E2723;
      --champagne: #C9A96E;
      --ivory: #FAF7F2;
      --charcoal: #2B2420;
      --text-primary: #1C1411;
      --text-secondary: #5C4B42;
      --text-muted: #8C7B6F;
      --card-bg: #FFFFFF;
      --border-light: #E8E0D5;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow-card: 0 2px 12px rgba(62,39,35,0.06);
      --shadow-hover: 0 8px 28px rgba(62,39,35,0.12);
      --font-serif: 'Noto Serif SC', serif;
      --font-sans: 'Noto Sans SC', sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--ivory);
      color: var(--text-primary);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    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;
    }
    /* 悬浮胶囊导航 */
    .nav-capsule {
      background: rgba(250,247,242,0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-light);
      border-radius: 40px;
      padding: 8px 32px;
      transition: box-shadow 0.3s ease;
      box-shadow: 0 4px 10px rgba(62,39,35,0.03);
    }
    .nav-scrolled {
      box-shadow: 0 8px 24px rgba(62,39,35,0.08);
    }
    .nav-link {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 6px 12px;
      border-radius: 30px;
      transition: all 0.2s;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--deep-wood);
      background: rgba(201,169,110,0.12);
    }
    /* 汉堡菜单 */
    .mobile-menu {
      display: none;
    }
    @media (max-width: 768px) {
      .desktop-nav-links {
        display: none !important;
      }
      .mobile-menu {
        display: flex;
        align-items: center;
      }
      .nav-capsule {
        padding: 8px 20px;
      }
    }
    /* 按钮 */
    .btn-primary {
      background: var(--champagne);
      color: var(--deep-wood);
      border-radius: var(--radius-sm);
      padding: 14px 32px;
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: background 0.25s, transform 0.15s;
      display: inline-block;
      text-align: center;
      box-shadow: 0 4px 10px rgba(201,169,110,0.25);
    }
    .btn-primary:hover {
      background: #B8934F;
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      color: var(--deep-wood);
      border: 1.5px solid var(--deep-wood);
      border-radius: var(--radius-sm);
      padding: 14px 32px;
      font-weight: 600;
      transition: all 0.25s;
      display: inline-block;
    }
    .btn-outline:hover {
      background: rgba(62,39,35,0.05);
      border-color: var(--deep-wood);
    }
    @media (max-width: 640px) {
      .btn-primary, .btn-outline {
        width: 100%;
        padding: 12px 24px;
      }
    }
    /* 卡片 */
    .card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }
    .card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .masonry-grid {
      columns: 3;
      column-gap: 20px;
    }
    @media (max-width: 1024px) {
      .masonry-grid { columns: 2; }
    }
    @media (max-width: 640px) {
      .masonry-grid { columns: 1; }
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 20px;
    }
    /* FAQ手风琴 */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      background: var(--ivory);
      padding: 20px 24px;
      font-weight: 600;
      font-size: 1.1rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background 0.2s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s cubic-bezier(0.4,0,0.2,1);
      background: white;
      border-left: 3px solid var(--champagne);
    }
    .faq-answer.show {
      max-height: 300px;
    }
    .faq-answer p {
      padding: 20px 24px;
      color: var(--text-secondary);
    }
    /* 对比卡片装饰 */
    .vs-badge {
      background: var(--deep-wood);
      color: white;
      border-radius: 50%;
      width: 48px;
      height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.2rem;
    }
    footer a:hover {
      color: var(--champagne);
    }