/* roulang page: index */
:root {
      --primary: #0A3D2E;
      --secondary: #7B2FBE;
      --accent: #D4A017;
      --bg-warm: #F7F5F0;
      --deep: #041F16;
      --text-main: #1A1A1A;
      --text-body: #3D3D3D;
      --text-muted: #6B6B6B;
      --border-light: #E5E0D8;
      --card-border: #E8E3DA;
      --white: #FFFFFF;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --radius-xs: 6px;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.10);
      --transition: 0.25s ease;
      --max-width: 1280px;
      --header-height: 64px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    img {
      display: block;
      max-width: 100%;
      height: auto;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
    }
    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--header-height);
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-light);
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background var(--transition);
    }
    .header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 20px;
      color: var(--primary);
      letter-spacing: -0.3px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 700;
      font-size: 18px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 4px 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--secondary);
      transition: width var(--transition);
    }
    .nav-links a:hover {
      color: var(--secondary);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .search-box {
      display: flex;
      align-items: center;
      background: #f0ede7;
      border-radius: 30px;
      padding: 6px 16px;
      width: 200px;
      border: 1px solid transparent;
      transition: border var(--transition);
    }
    .search-box input {
      background: transparent;
      border: none;
      outline: none;
      font-size: 14px;
      width: 100%;
      color: var(--text-body);
    }
    .search-box i {
      color: var(--text-muted);
      margin-right: 6px;
    }
    .btn-cta {
      background: var(--accent);
      color: white;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      background: #D4A017;
      transition: all var(--transition);
      font-size: 15px;
      white-space: nowrap;
    }
    .btn-cta:hover {
      background: #b8860b;
      transform: scale(1.03);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--primary);
      transition: var(--transition);
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: var(--header-height);
      left: 0;
      width: 100%;
      background: white;
      flex-direction: column;
      padding: 24px;
      gap: 20px;
      box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      z-index: 99;
    }
    .mobile-menu a {
      font-size: 18px;
      font-weight: 500;
      color: var(--text-main);
    }
    /* Hero */
    .hero {
      min-height: 90vh;
      display: flex;
      align-items: center;
      background: linear-gradient(90deg, rgba(10,61,46,0.75) 0%, rgba(10,61,46,0.3) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      color: white;
      margin-top: var(--header-height);
      position: relative;
    }
    .hero-content {
      display: flex;
      flex-direction: column;
      gap: 28px;
      max-width: 700px;
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      background: linear-gradient(135deg, #E0C88E, #F5E7C6);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-sub {
      font-size: 20px;
      opacity: 0.9;
    }
    .metric-cards {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
      margin: 20px 0;
    }
    .metric-item {
      background: rgba(0,0,0,0.45);
      backdrop-filter: blur(6px);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      min-width: 120px;
      text-align: center;
      border-left: 4px solid var(--accent);
    }
    .metric-num {
      font-size: 36px;
      font-weight: 700;
      color: var(--accent);
      font-family: 'Roboto Mono', monospace;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
    }
    .btn-secondary {
      background: transparent;
      border: 1px solid white;
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 500;
    }
    /* 通用区块 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 32px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    /* 指标看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      border-top: 4px solid var(--secondary);
      text-align: center;
      transition: var(--transition);
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--primary);
      font-family: 'Roboto Mono', monospace;
    }
    /* 服务矩阵 混合栅格 */
    .services-grid {
      display: grid;
      grid-template-columns: 2fr 2fr 1fr;
      gap: 24px;
    }
    .service-large {
      background: white;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--card-border);
      display: flex;
      flex-direction: column;
    }
    .service-large img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    .service-large .text {
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .service-small-stack {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .service-small {
      background: white;
      border-radius: var(--radius-md);
      padding: 20px;
      border: 1px solid var(--card-border);
      display: flex;
      align-items: center;
      gap: 16px;
      transition: var(--transition);
    }
    .service-small:hover {
      background: #f4f0fb;
      border-color: var(--secondary);
    }
    /* 对比 */
    .comparison-row {
      display: grid;
      grid-template-columns: 1fr 80px 1fr;
      align-items: center;
    }
    .vs-badge {
      background: var(--accent);
      color: white;
      font-weight: 700;
      width: 60px;
      height: 60px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin: 0 auto;
    }
    .compare-card {
      padding: 32px;
      border-radius: var(--radius-lg);
    }
    .left-compare {
      background: #EDEDED;
      color: #888;
    }
    .right-compare {
      background: var(--primary);
      color: white;
    }
    .right-compare .highlight {
      color: var(--accent);
      font-weight: 700;
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 20px 0;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      font-size: 18px;
      cursor: pointer;
      color: var(--text-main);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-body);
    }
    /* 表单 */
    .contact-section {
      background: var(--deep);
      color: white;
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .contact-form input {
      width: 100%;
      padding: 14px;
      border-radius: var(--radius-xs);
      border: none;
      margin-bottom: 16px;
      font-size: 16px;
    }
    .btn-submit {
      background: var(--accent);
      width: 100%;
      padding: 14px;
      font-weight: 700;
      border-radius: var(--radius-xs);
    }
    /* 页脚 */
    .footer {
      background: var(--deep);
      color: #B0B0B0;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    @media (max-width: 1024px) {
      .services-grid { grid-template-columns: 1fr 1fr; }
      .comparison-row { grid-template-columns: 1fr; }
      .vs-badge { margin: 20px auto; }
    }
    @media (max-width: 768px) {
      .nav-links, .search-box { display: none; }
      .hamburger { display: flex; }
      .dashboard-grid { grid-template-columns: 1fr 1fr; }
      .services-grid { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }