/* roulang page: index */
:root {
      --primary: #0A3D2E;
      --primary-light: #1a5a45;
      --accent: #FF6B35;
      --accent-hover: #FF8C5A;
      --bg: #F7F5F2;
      --white: #FFFFFF;
      --text-primary: #1A1A1A;
      --text-secondary: #3A3A3A;
      --text-muted: #6B6B6B;
      --gold-light: #F0E6D2;
      --success: #2E8B57;
      --border-light: #e8e6e1;
      --shadow-card: 0 8px 30px rgba(10,61,46,0.12);
      --shadow-nav: 0 2px 20px rgba(0,0,0,0.06);
      --radius-lg: 12px;
      --radius-md: 8px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", sans-serif;
      --font-mono: "DIN Alternate", "Roboto Mono", "Menlo", monospace;
      --transition: 0.3s ease-out;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text-secondary);
      line-height: 1.7;
      font-size: 16px;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }
    h1, h2, h3, h4 {
      font-weight: 600;
      color: var(--text-primary);
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
    }
    /* 导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: var(--white);
      z-index: 1000;
      height: 72px;
      display: flex;
      align-items: center;
      transition: box-shadow var(--transition);
    }
    .nav.scrolled {
      box-shadow: var(--shadow-nav);
    }
    .nav .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: -0.5px;
    }
    .logo span {
      color: var(--accent);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--text-secondary);
      transition: color var(--transition);
      font-size: 0.95rem;
    }
    .nav-links a:hover {
      color: var(--accent);
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      padding: 12px 24px;
      border-radius: var(--radius-md);
      font-weight: 600;
      transition: background var(--transition), box-shadow var(--transition);
      display: inline-block;
      box-shadow: 0 2px 8px rgba(255,107,53,0.3);
      border: 2px solid transparent;
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      box-shadow: 0 4px 16px rgba(255,107,53,0.45);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 10px 22px;
      border-radius: var(--radius-md);
      font-weight: 600;
      transition: all var(--transition);
      display: inline-block;
    }
    .btn-outline:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: rgba(255,107,53,0.05);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--primary);
      transition: var(--transition);
    }
    /* 移动端导航 */
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: var(--primary);
      z-index: 999;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 32px;
      transform: translateX(100%);
      transition: transform 0.4s ease;
    }
    .mobile-menu.active {
      transform: translateX(0);
    }
    .mobile-menu a {
      color: var(--white);
      font-size: 1.5rem;
      font-weight: 500;
    }
    .mobile-menu .btn-primary {
      background: var(--accent);
      border: none;
    }
    /* Hero */
    .hero {
      padding: 140px 0 80px;
      background: linear-gradient(135deg, #f7f5f2 0%, #eae7e0 100%);
      position: relative;
      overflow: hidden;
    }
    .hero .container {
      display: flex;
      align-items: center;
      gap: 60px;
    }
    .hero-content {
      flex: 1;
    }
    .hero h1 {
      font-size: 48px;
      line-height: 1.2;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 20px;
    }
    .hero .sub {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-data {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .data-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 24px;
      display: flex;
      align-items: center;
      gap: 16px;
      box-shadow: var(--shadow-card);
      transition: transform var(--transition);
    }
    .data-card:hover {
      transform: translateY(-4px);
    }
    .data-icon {
      font-size: 2rem;
      color: var(--accent);
    }
    .data-number {
      font-family: var(--font-mono);
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--primary);
    }
    .data-label {
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 36px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--primary);
    }
    .section-desc {
      color: var(--text-muted);
      max-width: 700px;
      margin-bottom: 48px;
    }
    /* 数据看板 */
    .dashboard {
      background: var(--primary);
      color: white;
      padding: 70px 0;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 32px;
    }
    .stat-item {
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 3rem;
      font-weight: 700;
      color: var(--white);
    }
    .stat-label {
      color: var(--gold-light);
      margin-top: 8px;
    }
    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 32px;
    }
    .service-card {
      background: var(--white);
      padding: 32px;
      border-radius: var(--radius-lg);
      transition: all var(--transition);
      box-shadow: 0 4px 12px rgba(0,0,0,0.04);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card);
    }
    .service-icon {
      font-size: 2.2rem;
      color: var(--accent);
      margin-bottom: 16px;
    }
    .service-card h3 {
      margin-bottom: 12px;
    }
    /* 对比表格 */
    .compare-table {
      background: var(--white);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .table-row {
      display: flex;
      border-bottom: 1px solid var(--border-light);
    }
    .table-row:last-child {
      border: none;
    }
    .table-cell {
      flex: 1;
      padding: 20px 24px;
    }
    .table-header {
      background: var(--primary);
      color: white;
      font-weight: 600;
    }
    /* 信任墙 */
    .trust-logos {
      display: flex;
      justify-content: center;
      gap: 48px;
      flex-wrap: wrap;
      opacity: 0.8;
    }
    /* FAQ */
    .faq-item {
      background: var(--white);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      padding: 20px 24px;
      cursor: pointer;
      transition: background var(--transition);
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 500;
      font-size: 18px;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-secondary);
      margin-top: 0;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }
    /* 表单 */
    .cta-form {
      background: #eaf4f0;
      border-radius: var(--radius-lg);
      padding: 48px;
      text-align: center;
    }
    .form-row {
      display: flex;
      gap: 16px;
      max-width: 600px;
      margin: 32px auto 0;
      flex-wrap: wrap;
      justify-content: center;
    }
    .form-row input {
      flex: 1;
      padding: 14px 18px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      font-size: 16px;
      background: white;
    }
    /* 页脚 */
    .footer {
      background: var(--primary);
      color: var(--gold-light);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer a {
      color: var(--gold-light);
      transition: color var(--transition);
    }
    .footer a:hover {
      color: var(--accent);
    }
    .copyright {
      border-top: 1px solid rgba(255,255,255,0.2);
      padding-top: 24px;
      text-align: center;
      font-size: 0.9rem;
    }
    @media (max-width: 1024px) {
      .container { padding: 0 24px; }
      .hero .container { flex-direction: column; }
      .services-grid { grid-template-columns: repeat(2,1fr); }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero h1 { font-size: 32px; }
      .section-title { font-size: 26px; }
      .services-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .table-row { flex-direction: column; }
    }