/* roulang page: index */
:root {
      --primary: #0B1E33;
      --secondary: #C9923C;
      --bg: #F4F6F9;
      --accent: #1F7B4D;
      --text: #1E2B3C;
      --text-light: #5A6B7F;
      --white: #FFFFFF;
      --border: #D0D7E2;
      --shadow-sm: 0 4px 16px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
      --radius: 12px;
      --radius-btn: 8px;
      --transition: 0.2s ease;
      --font-head: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, -apple-system, sans-serif;
      --font-body: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, -apple-system, sans-serif;
      --container-max: 1280px;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      padding-bottom: 70px; /* 移动端底部Tab预留空间 */
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }

    img {
      max-width: 100%;
      display: block;
      height: auto;
    }

    button, input, textarea {
      font-family: inherit;
      font-size: inherit;
    }

    /* 导航栏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(12px);
      height: 72px;
      display: flex;
      align-items: center;
      transition: background var(--transition), box-shadow var(--transition);
    }

    .header.scrolled {
      background: var(--white);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    }

    .header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo {
      font-family: var(--font-head);
      font-weight: 700;
      font-size: 22px;
      color: var(--primary);
      letter-spacing: 0.5px;
    }
    .logo span {
      color: var(--secondary);
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text);
      position: relative;
      padding: 4px 0;
      font-size: 16px;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--secondary);
      transition: width 0.2s ease;
    }

    .nav-links a:hover {
      color: var(--secondary);
    }
    .nav-links a:hover::after {
      width: 100%;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
    }

    /* 移动端底部Tab */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 56px;
      background: var(--white);
      box-shadow: 0 -2px 8px rgba(0,0,0,0.04);
      z-index: 999;
      justify-content: space-around;
      align-items: center;
      border-top: 1px solid rgba(0,0,0,0.03);
    }

    .mobile-bottom-nav a {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      color: var(--text-light);
      gap: 4px;
      transition: color 0.2s;
      font-weight: 500;
    }
    .mobile-bottom-nav a i {
      font-size: 20px;
    }
    .mobile-bottom-nav a.active {
      color: var(--primary);
    }

    /* 首屏看板 */
    .dashboard {
      background-color: var(--primary);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      min-height: 85vh;
      display: flex;
      align-items: center;
      color: white;
      margin-top: 0;
      padding: 120px 0 80px;
    }

    .dashboard::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(11,30,51,0.85) 0%, rgba(11,30,51,0.7) 100%);
    }

    .dashboard .container {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      gap: 48px;
    }

    .hero-title {
      font-family: var(--font-head);
      font-size: clamp(36px, 5vw, 52px);
      font-weight: 700;
      line-height: 1.3;
      max-width: 700px;
    }

    .metrics {
      display: flex;
      flex-wrap: wrap;
      gap: 48px;
      margin-top: 20px;
    }

    .metric-item {
      display: flex;
      flex-direction: column;
    }
    .metric-number {
      font-size: 48px;
      font-weight: 700;
      color: white;
      line-height: 1.1;
    }
    .metric-label {
      font-size: 16px;
      color: var(--secondary);
      font-weight: 500;
      letter-spacing: 0.3px;
    }

    /* 通用板块 */
    section {
      padding: 80px 0;
    }

    .section-title {
      font-family: var(--font-head);
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--primary);
    }

    .section-sub {
      color: var(--text-light);
      max-width: 600px;
      margin-bottom: 40px;
    }

    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--white);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all var(--transition);
      display: flex;
      flex-direction: column;
      gap: 16px;
      border: 1px solid rgba(0,0,0,0.02);
    }
    .service-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
    }
    .icon-circle {
      width: 48px;
      height: 48px;
      background: rgba(201,146,60,0.12);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--secondary);
      font-size: 24px;
    }
    .service-card h3 {
      font-size: 20px;
      font-weight: 700;
    }
    .service-card p {
      color: var(--text-light);
      font-size: 15px;
      line-height: 1.6;
    }

    /* 结果对比 */
    .compare-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      background: var(--white);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .before, .after {
      padding: 24px;
      border-radius: 10px;
    }
    .before {
      background: #f0f2f5;
      color: #4a5568;
    }
    .after {
      background: rgba(31,123,77,0.06);
      border-left: 4px solid var(--accent);
    }
    .compare-title {
      font-weight: 700;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .highlight-green {
      color: var(--accent);
      font-weight: 700;
    }

    /* FAQ */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--white);
      border-radius: var(--radius);
      padding: 0 24px;
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }
    .faq-question {
      width: 100%;
      background: transparent;
      border: none;
      text-align: left;
      padding: 20px 0;
      font-weight: 700;
      font-size: 18px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      color: var(--primary);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #f8fafc;
      margin: 0 -24px;
      padding: 0 24px;
      color: var(--text-light);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 24px;
    }
    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }
    .faq-arrow {
      transition: transform 0.2s ease;
      color: var(--secondary);
    }

    /* 表单 */
    .cta-section {
      background: rgba(201,146,60,0.08);
      border-radius: 24px;
      padding: 48px;
      text-align: center;
    }
    .form-row {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
      margin-top: 24px;
    }
    .form-row input, .form-row textarea {
      flex: 1 1 200px;
      padding: 12px 16px;
      border: 1px solid var(--border);
      border-radius: var(--radius-btn);
      background: white;
      outline: none;
      transition: border 0.2s;
    }
    .form-row input:focus, .form-row textarea:focus {
      border-color: var(--primary);
    }
    .btn {
      background: var(--secondary);
      color: white;
      border: none;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: background 0.2s;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn:hover {
      background: #B07D2E;
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }

    /* 页脚 */
    .footer {
      background: var(--primary);
      color: #B0C0D0;
      padding: 48px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
    }
    .footer h4 {
      color: var(--secondary);
      margin-bottom: 16px;
      font-weight: 700;
    }
    .footer a:hover {
      color: white;
    }

    @media (max-width: 1024px) {
      .services-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      .mobile-bottom-nav { display: flex; }
      body { padding-bottom: 70px; }
      .dashboard { min-height: 70vh; padding: 100px 0 60px; }
      .metrics { gap: 24px; }
      .compare-block { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .services-grid { grid-template-columns: 1fr; }
      .cta-section { padding: 32px 20px; }
    }

    @media (max-width: 480px) {
      .container { padding: 0 16px; }
      .metric-number { font-size: 36px; }
      .form-row input, .form-row textarea { flex: 1 1 100%; }
    }