/* roulang page: index */
:root {
      --primary-orange: #FF5C00;
      --primary-dark: #E04E00;
      --deep-blue: #0A1E3F;
      --bg-light: #F8FAFC;
      --card-white: #FFFFFF;
      --text-heading: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --gold-accent: #F59E0B;
      --border-light: #E2E8F0;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.08);
      --radius-lg: 16px;
      --radius-btn: 12px;
      --radius-input: 10px;
      --transition: 0.25s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.9);
      backdrop-filter: blur(8px);
      box-shadow: 0 1px 8px rgba(0,0,0,0.02);
      z-index: 50;
      padding: 16px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--primary-orange);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 700;
      font-size: 20px;
    }
    .logo-text {
      font-size: 22px;
      font-weight: 700;
      color: var(--text-heading);
      letter-spacing: -0.3px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      text-decoration: none;
      color: var(--text-body);
      font-weight: 500;
      font-size: 16px;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--primary-orange);
    }
    .btn-primary {
      background: var(--primary-orange);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: background 0.2s, box-shadow 0.2s;
      text-decoration: none;
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 8px 20px rgba(255,92,0,0.3);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-orange);
      color: var(--primary-orange);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      display: inline-block;
      transition: all 0.2s;
    }
    .btn-outline:hover {
      background: var(--primary-orange);
      color: white;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--text-heading);
      border-radius: 2px;
    }
    /* 移动端导航抽屉 */
    .mobile-menu {
      position: fixed;
      top: 0;
      right: -100%;
      width: 80%;
      max-width: 320px;
      height: 100vh;
      background: white;
      box-shadow: -10px 0 30px rgba(0,0,0,0.1);
      z-index: 100;
      padding: 80px 30px;
      display: flex;
      flex-direction: column;
      gap: 28px;
      transition: right 0.35s ease;
    }
    .mobile-menu.active {
      right: 0;
    }
    .mobile-menu a {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-heading);
      text-decoration: none;
    }
    .overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.3);
      z-index: 99;
      display: none;
    }
    .overlay.active {
      display: block;
    }
    /* 区块通用 */
    section {
      padding: 120px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 80px 0;
      }
    }
    h2 {
      font-size: 32px;
      font-weight: 600;
      color: var(--text-heading);
      margin-bottom: 16px;
    }
    /* Hero */
    .hero {
      padding: 160px 0 100px;
      background: var(--bg-light);
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: flex;
      gap: 60px;
      align-items: center;
    }
    .hero-content {
      flex: 1;
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--text-heading);
      letter-spacing: -0.5px;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-body);
      margin: 20px 0 28px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-visual {
      flex: 1;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      min-height: 340px;
      border-radius: 24px;
      position: relative;
      overflow: hidden;
    }
    .hero-visual::after {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(255,92,0,0.08);
    }
    .data-badge-row {
      display: flex;
      gap: 24px;
      margin-top: 36px;
    }
    .data-badge {
      background: white;
      padding: 16px 20px;
      border-radius: 16px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      flex: 1;
    }
    .data-number {
      font-size: 36px;
      font-weight: 800;
      color: var(--primary-orange);
      line-height: 1.2;
    }
    .data-label {
      font-size: 14px;
      color: var(--text-muted);
    }
    /* 服务卡片网格 */
    .services-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 24px;
      margin-top: 40px;
    }
    .service-card {
      background: var(--card-white);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-orange);
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 24px;
    }
    .service-card h3 {
      font-size: 20px;
      font-weight: 600;
      color: var(--text-heading);
    }
    .service-desc {
      color: var(--text-body);
      font-size: 15px;
    }
    /* 对比模块 */
    .comparison-row {
      display: flex;
      gap: 30px;
      margin-top: 40px;
    }
    .compare-col {
      flex: 1;
      border-radius: 20px;
      padding: 32px;
    }
    .left-col {
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
    }
    .right-col {
      background: var(--deep-blue);
      color: white;
      background-image: linear-gradient(135deg, #0A1E3F 0%, #132E54 100%);
    }
    .compare-item {
      display: flex;
      justify-content: space-between;
      margin-bottom: 24px;
      font-weight: 500;
    }
    .right-col .compare-value {
      color: var(--primary-orange);
      font-weight: 700;
    }
    .left-col .compare-value {
      color: #64748B;
    }
    /* FAQ */
    .faq-list {
      margin-top: 32px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: white;
      border-radius: 16px;
      padding: 20px 24px;
      box-shadow: var(--shadow-sm);
      cursor: pointer;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      color: var(--text-heading);
      align-items: center;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: #475569;
      margin-top: 0;
      line-height: 1.8;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }
    /* CTA 转化区 */
    .cta-section {
      background: var(--deep-blue);
      color: white;
      text-align: center;
      padding: 100px 0;
    }
    .cta-form {
      max-width: 500px;
      margin: 32px auto 0;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .cta-form input, .cta-form textarea {
      padding: 14px 18px;
      border-radius: var(--radius-input);
      border: 1px solid var(--border-light);
      font-size: 16px;
      background: white;
      outline: none;
    }
    .cta-form input:focus, .cta-form textarea:focus {
      border-color: var(--primary-orange);
      box-shadow: 0 0 0 3px rgba(255,92,0,0.1);
    }
    .trust-badges {
      display: flex;
      justify-content: center;
      gap: 24px;
      margin-top: 24px;
      color: #CBD5E1;
    }
    /* 页脚 */
    .footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    .footer a {
      color: #CBD5E1;
      text-decoration: none;
    }
    @media (max-width: 1024px) {
      .hero-grid {
        flex-direction: column;
      }
      .services-grid {
        grid-template-columns: 1fr 1fr;
      }
      .comparison-row {
        flex-direction: column;
      }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      h1 { font-size: 32px !important; }
      h2 { font-size: 24px; }
      .data-badge-row { flex-direction: column; }
      .services-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }