/* roulang page: index */
:root {
      --color-espresso: #2B1E16;
      --color-gold: #C19A6B;
      --color-gold-hover: #A67C4A;
      --color-warm-white: #FAF7F2;
      --color-parchment: #F3EDE3;
      --color-rose: #8B3A3A;
      --color-body-text: #3C332C;
      --color-sub-text: #6B5E53;
      --color-border: #D9CFC0;
      --color-white: #FFFFFF;
      
      --font-serif: 'Noto Serif SC', 'Times New Roman', serif;
      --font-display: 'Playfair Display', var(--font-serif);
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      
      --shadow-sm: 0 2px 12px rgba(43, 30, 22, 0.06);
      --shadow-md: 0 8px 24px rgba(43, 30, 22, 0.12);
      --shadow-header: 0 1px 4px rgba(0, 0, 0, 0.04);
      --radius-card: 12px;
      --radius-btn: 8px;
      --transition: all 0.25s ease;
      --container-max: 1280px;
      --section-gap: 120px;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--color-warm-white);
      color: var(--color-body-text);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }
    
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    
    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      font-weight: 600;
      border: none;
      background: none;
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      white-space: nowrap;
    }
    
    h1, h2, h3, h4 {
      font-family: var(--font-serif);
      color: var(--color-espresso);
      font-weight: 700;
    }
    
    h1 {
      font-size: 3rem;
      line-height: 1.2;
      letter-spacing: -0.5px;
    }
    
    h2 {
      font-size: 2.25rem;
      line-height: 1.3;
      font-weight: 600;
      margin-bottom: 0.75rem;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }
    
    h2::after {
      content: '';
      display: block;
      width: 40px;
      height: 3px;
      background-color: var(--color-gold);
      margin-top: 0.5rem;
      border-radius: 2px;
    }
    
    h3 {
      font-size: 1.375rem;
      line-height: 1.4;
      font-weight: 600;
    }
    
    .section {
      padding: var(--section-gap) 0;
    }
    
    /* 导航 Header */
    .site-header {
      background: var(--color-white);
      box-shadow: var(--shadow-header);
      position: sticky;
      top: 0;
      z-index: 50;
      height: 64px;
      display: flex;
      align-items: center;
    }
    
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-serif);
      font-size: 1.375rem;
      font-weight: 700;
      color: var(--color-espresso);
    }
    
    .logo-icon {
      font-size: 1.8rem;
      color: var(--color-gold);
    }
    
    .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
    }
    
    .nav-links a {
      font-size: 1rem;
      color: var(--color-body-text);
      padding: 0.25rem 0;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
      font-weight: 500;
    }
    
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--color-gold);
      border-bottom-color: var(--color-gold);
    }
    
    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    
    .search-box {
      display: flex;
      align-items: center;
      background: var(--color-warm-white);
      border: 1px solid var(--color-border);
      border-radius: 2rem;
      padding: 0.4rem 1rem;
      gap: 6px;
      color: var(--color-sub-text);
    }
    
    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      font-size: 0.9rem;
      width: 120px;
    }
    
    .btn-primary {
      background: var(--color-gold);
      color: var(--color-white);
      border-radius: var(--radius-btn);
      padding: 10px 24px;
      font-weight: 600;
      box-shadow: 0 2px 8px rgba(193, 154, 107, 0.3);
    }
    
    .btn-primary:hover {
      background: var(--color-gold-hover);
      box-shadow: 0 6px 16px rgba(193, 154, 107, 0.4);
      transform: translateY(-1px);
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid var(--color-gold);
      color: var(--color-gold);
      border-radius: var(--radius-btn);
      padding: 12px 32px;
      font-weight: 600;
    }
    
    .btn-outline:hover {
      background: var(--color-gold);
      color: var(--color-white);
    }
    
    .hamburger {
      display: none;
      font-size: 1.6rem;
      color: var(--color-espresso);
    }
    
    /* Hero 双栏 */
    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 3rem;
      align-items: center;
      padding: 4rem 0;
    }
    
    .hero-content {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }
    
    .hero-eyebrow {
      font-family: var(--font-display);
      font-size: 0.9rem;
      letter-spacing: 3px;
      color: var(--color-gold);
      text-transform: uppercase;
    }
    
    .hero-desc {
      font-size: 1rem;
      color: var(--color-sub-text);
      max-width: 480px;
    }
    
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-top: 0.5rem;
    }
    
    .hero-image {
      background: var(--color-parchment);
      border-radius: 16px;
      overflow: hidden;
      transition: transform 0.4s ease;
      aspect-ratio: 4/5;
    }
    
    .hero-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    
    .hero-image:hover {
      transform: scale(1.02);
    }
    
    /* 亮点网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    
    .highlight-card {
      background: var(--color-parchment);
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      border: 1px solid var(--color-border);
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    
    .highlight-card:hover {
      background: var(--color-warm-white);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    
    .highlight-icon {
      font-size: 2.5rem;
      color: var(--color-gold);
      margin-bottom: 1rem;
    }
    
    /* 案例瀑布 */
    .case-waterfall {
      column-count: 3;
      column-gap: 24px;
    }
    
    .case-item {
      break-inside: avoid;
      margin-bottom: 24px;
      background: var(--color-white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    
    .case-item:hover {
      box-shadow: var(--shadow-md);
    }
    
    .case-img {
      width: 100%;
      display: block;
      aspect-ratio: 3/4;
      object-fit: cover;
      background: var(--color-parchment);
    }
    
    .case-text {
      padding: 20px;
    }
    
    .case-tag {
      background: var(--color-gold);
      color: white;
      font-size: 0.75rem;
      padding: 2px 10px;
      border-radius: 20px;
      display: inline-block;
      margin-bottom: 8px;
      letter-spacing: 0.5px;
    }
    
    /* 方案对比 */
    .compare-table {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      align-items: start;
    }
    
    .plan-card {
      background: var(--color-parchment);
      border-radius: var(--radius-card);
      padding: 2rem;
      border: 1px solid var(--color-border);
    }
    
    .plan-premium {
      border-left: 4px solid var(--color-gold);
      background: var(--color-white);
    }
    
    .plan-badge {
      font-size: 0.8rem;
      background: #ddd;
      padding: 4px 12px;
      border-radius: 20px;
      display: inline-block;
      margin-bottom: 1rem;
    }
    
    .gold-badge {
      background: var(--color-gold);
      color: white;
    }
    
    .feature-row {
      display: flex;
      justify-content: space-between;
      padding: 0.8rem 0;
      border-bottom: 1px solid var(--color-border);
    }
    
    /* FAQ */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    
    .faq-item {
      background: var(--color-parchment);
      border-radius: var(--radius-card);
      overflow: hidden;
    }
    
    .faq-question {
      padding: 1.2rem 1.5rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-family: var(--font-serif);
      font-size: 1.2rem;
      cursor: pointer;
    }
    
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      background: var(--color-white);
      padding: 0 1.5rem;
    }
    
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 1rem 1.5rem;
    }
    
    /* 联系 CTA */
    .cta-dark {
      background: var(--color-espresso);
      color: var(--color-warm-white);
      border-radius: 24px;
      padding: 4rem 2rem;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }
    
    .cta-dark h2 {
      color: white;
    }
    
    .cta-form input, .cta-form textarea {
      width: 100%;
      padding: 12px;
      margin-bottom: 1rem;
      background: var(--color-warm-white);
      border: 1px solid var(--color-gold);
      border-radius: var(--radius-btn);
      font-family: var(--font-sans);
    }
    
    /* 页脚 */
    .site-footer {
      background: var(--color-parchment);
      padding: 3rem 0 1.5rem;
      margin-top: var(--section-gap);
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
    }
    
    @media (max-width: 1024px) {
      .hero-grid, .compare-table, .cta-dark {
        grid-template-columns: 1fr;
      }
      .highlights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .case-waterfall {
        column-count: 2;
      }
    }
    
    @media (max-width: 768px) {
      .nav-links, .header-actions .search-box, .header-actions .btn-primary {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .highlights-grid {
        grid-template-columns: 1fr;
      }
      .case-waterfall {
        column-count: 1;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      h1 {
        font-size: 2.2rem;
      }
    }