/* roulang page: index */
:root {
      --primary: #C8A96E;
      --primary-hover: #B8955A;
      --primary-soft: rgba(200,169,110,0.08);
      --primary-border: rgba(200,169,110,0.15);
      --secondary: #1E1E1E;
      --bg: #FAF8F5;
      --white: #FFFFFF;
      --text: #2C2C2C;
      --text-light: #5A5A5A;
      --text-muted: #7A7A7A;
      --border: #EAE6DD;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --radius-sm: 8px;
      --radius: 12px;
      --radius-lg: 20px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-number: "Inter", "SF Pro Display", sans-serif;
      --max-width: 1280px;
      --gap: 24px;
      --section-padding: 120px;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航栏 - 分段标签式 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(250,248,245,0.85);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border-bottom: 1px solid transparent;
      transition: all 0.25s ease;
    }
    
    .header.scrolled {
      border-bottom: 1px solid var(--border);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 68px;
    }
    
    .logo {
      font-size: 22px;
      font-weight: 700;
      color: var(--secondary);
      text-decoration: none;
      letter-spacing: -0.3px;
      white-space: nowrap;
    }
    
    .logo i {
      color: var(--primary);
      margin-right: 6px;
      font-size: 24px;
    }
    
    .nav-chips {
      display: flex;
      align-items: center;
      gap: 6px;
      flex-wrap: wrap;
    }
    
    .nav-chip {
      padding: 8px 16px;
      border-radius: 40px;
      font-size: 15px;
      font-weight: 500;
      color: #555;
      text-decoration: none;
      transition: all 0.2s ease;
      background: transparent;
      white-space: nowrap;
    }
    
    .nav-chip.active {
      background: var(--primary-soft);
      color: var(--primary);
      font-weight: 600;
    }
    
    .nav-chip:hover {
      background: rgba(200,169,110,0.06);
      color: var(--primary);
    }
    
    .nav-cta {
      margin-left: 8px;
      padding: 10px 22px;
      background: var(--primary);
      color: var(--white);
      border-radius: 40px;
      font-weight: 600;
      font-size: 15px;
      text-decoration: none;
      transition: background 0.2s ease;
      white-space: nowrap;
    }
    
    .nav-cta:hover {
      background: var(--primary-hover);
    }
    
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--secondary);
      cursor: pointer;
      padding: 8px;
    }
    
    /* 板块通用 */
    section {
      padding: var(--section-padding) 0;
    }
    
    .section-title {
      font-size: 28px;
      font-weight: 600;
      letter-spacing: -0.3px;
      color: var(--secondary);
      margin-bottom: 16px;
    }
    
    .section-subtitle {
      font-size: 18px;
      color: var(--text-light);
      margin-bottom: 48px;
    }
    
    /* Hero 首屏 */
    .hero {
      padding: 140px 0 100px;
      background: radial-gradient(circle at 20% 20%, rgba(200,169,110,0.06) 0%, #FAF8F5 70%);
    }
    
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 60px;
      align-items: center;
    }
    
    .hero-content h1 {
      font-size: 40px;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.25;
      color: var(--secondary);
      margin-bottom: 20px;
    }
    
    .hero-content .subtitle {
      font-size: 18px;
      color: var(--text-light);
      margin-bottom: 32px;
      line-height: 1.6;
    }
    
    .hero-stats {
      display: flex;
      gap: 32px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }
    
    .stat-item {
      text-align: left;
    }
    
    .stat-number {
      font-family: var(--font-number);
      font-size: 36px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    
    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
    }
    
    .btn-primary {
      display: inline-block;
      background: var(--primary);
      color: var(--white);
      padding: 15px 36px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 17px;
      text-decoration: none;
      transition: background 0.2s;
      cursor: pointer;
      border: none;
      letter-spacing: 0.3px;
    }
    
    .btn-primary:hover {
      background: var(--primary-hover);
    }
    
    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: var(--radius-lg);
      height: 420px;
      box-shadow: var(--shadow-md);
      transition: transform 0.3s ease;
    }
    
    .hero-image:hover {
      transform: scale(1.02);
    }
    
    /* 核心优势 非对称双列 */
    .value-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }
    
    .value-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
    }
    
    .value-card.large {
      grid-row: span 2;
    }
    
    .value-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    
    .value-icon {
      font-size: 32px;
      color: var(--primary);
      margin-bottom: 20px;
    }
    
    .value-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 12px;
      color: var(--secondary);
    }
    
    .value-card p {
      color: var(--text-light);
      font-size: 16px;
    }
    
    /* 功能分组 图文交错 */
    .capability-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      margin-bottom: 80px;
    }
    
    .capability-block:last-child {
      margin-bottom: 0;
    }
    
    .capability-text h3 {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--secondary);
    }
    
    .capability-text p {
      color: var(--text-light);
    }
    
    .capability-img {
      background-size: cover;
      background-position: center;
      border-radius: var(--radius);
      height: 300px;
      box-shadow: var(--shadow-sm);
    }
    
    /* 使用场景 横向滚动卡片 */
    .scenario-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scroll-snap-type: x mandatory;
    }
    
    .scenario-card {
      flex: 0 0 320px;
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      scroll-snap-align: start;
      transition: all 0.25s;
    }
    
    .scenario-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    
    .scenario-card img {
      width: 100%;
      height: 160px;
      object-fit: cover;
      border-radius: var(--radius-sm);
      margin-bottom: 20px;
    }
    
    /* 案例横幅式 */
    .case-banner {
      display: flex;
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      margin-bottom: 28px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    
    .case-data {
      background: var(--secondary);
      color: var(--white);
      padding: 32px;
      min-width: 200px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    
    .case-data .number {
      font-size: 38px;
      font-weight: 700;
      font-family: var(--font-number);
      color: var(--primary);
    }
    
    .case-desc {
      padding: 32px;
    }
    
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    
    .faq-item {
      background: #FAF8F5;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }
    
    .faq-question {
      padding: 20px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      transition: background 0.2s;
    }
    
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding: 0 20px;
      color: var(--text-light);
    }
    
    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }
    
    .faq-item.open {
      background: var(--white);
      border: 1px solid var(--border);
    }
    
    /* CTA 区块 */
    .cta-section {
      background: rgba(200,169,110,0.08);
    }
    
    .cta-box {
      text-align: center;
    }
    
    .cta-form {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 32px;
    }
    
    .cta-form input {
      padding: 14px 20px;
      border: 1px solid #DDD;
      border-radius: var(--radius-sm);
      font-size: 16px;
      outline: none;
      transition: border 0.2s, box-shadow 0.2s;
      flex: 1 1 220px;
    }
    
    .cta-form input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(200,169,110,0.15);
    }
    
    /* 页脚 */
    .footer {
      background: var(--secondary);
      color: #CCC;
      padding: 60px 0 30px;
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
    }
    
    .footer a {
      color: #CCC;
      text-decoration: none;
    }
    
    .footer a:hover {
      color: var(--primary);
    }
    
    .copyright {
      border-top: 1px solid #333;
      margin-top: 40px;
      padding-top: 20px;
      font-size: 13px;
      color: #999;
    }
    
    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-grid, .capability-block {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .value-grid {
        grid-template-columns: 1fr;
      }
      .case-banner {
        flex-direction: column;
      }
    }
    
    @media (max-width: 768px) {
      :root {
        --section-padding: 80px;
      }
      .nav-chips {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-container {
        justify-content: space-between;
      }
      .hero-content h1 {
        font-size: 32px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }