/* roulang page: index */
:root {
      --panda-black: #1A1A1A;
      --bamboo-green: #2E8B57;
      --bamboo-dark: #1F6B43;
      --energy-orange: #FF6B35;
      --bg-light: #F5F7FA;
      --card-white: #FFFFFF;
      --text-primary: #1A1A1A;
      --text-secondary: #4A4A4A;
      --text-weak: #CCCCCC;
      --border-light: #DDDDDD;
      --radius-sm: 8px;
      --radius-md: 12px;
      --shadow-card: 0 4px 12px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 20px rgba(0,0,0,0.10);
      --transition-default: all 0.2s ease;
    }

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

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-primary);
      line-height: 1.6;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button, input {
      font-family: inherit;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 按钮系统 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      font-weight: 600;
      padding: 12px 24px;
      cursor: pointer;
      transition: var(--transition-default);
      border: 2px solid transparent;
      font-size: 16px;
      line-height: 1.2;
    }
    .btn-primary {
      background-color: var(--bamboo-green);
      color: white;
      border-color: var(--bamboo-green);
    }
    .btn-primary:hover {
      background-color: var(--bamboo-dark);
      border-color: var(--bamboo-dark);
      transform: translateY(-1px);
      box-shadow: var(--shadow-hover);
    }
    .btn-secondary {
      background-color: transparent;
      color: var(--panda-black);
      border-color: var(--panda-black);
    }
    .btn-secondary:hover {
      background-color: var(--panda-black);
      color: white;
      transform: translateY(-1px);
    }
    .btn-orange {
      background-color: var(--energy-orange);
      color: white;
      border-color: var(--energy-orange);
      font-weight: 700;
      padding: 14px 28px;
      letter-spacing: 0.5px;
    }
    .btn-orange:hover {
      background-color: #e55a2b;
      border-color: #e55a2b;
      box-shadow: 0 8px 18px rgba(255,107,53,0.3);
      transform: translateY(-2px);
    }
    .btn-outline-white {
      background: transparent;
      border: 2px solid white;
      color: white;
    }
    .btn-outline-white:hover {
      background: white;
      color: var(--panda-black);
    }

    /* 导航 */
    .site-header {
      background: white;
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 1px 6px rgba(0,0,0,0.04);
      width: 100%;
    }
    .navbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 22px;
      color: var(--panda-black);
      letter-spacing: 0.5px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--panda-black);
      border-radius: 50%;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 800;
      font-size: 18px;
    }
    .logo-icon::before {
      content: "🐼";
      font-size: 20px;
      transform: scale(1.2);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-link {
      font-weight: 500;
      color: var(--text-secondary);
      position: relative;
      padding: 4px 0;
      border-bottom: 2px solid transparent;
    }
    .nav-link:hover,
    .nav-link.active {
      color: var(--panda-black);
      border-bottom-color: var(--bamboo-green);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .hamburger span {
      display: block;
      width: 26px;
      height: 2.5px;
      background: var(--panda-black);
      transition: 0.3s;
      border-radius: 2px;
    }

    /* Hero */
    .hero {
      background-color: var(--panda-black);
      padding: 80px 0;
      position: relative;
      overflow: hidden;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(0,0,0,0.65);
    }
    .hero-content {
      position: relative;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 40px;
    }
    .hero-text {
      flex: 1 1 500px;
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      color: white;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-weak);
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    .hero-stats {
      display: flex;
      gap: 24px;
      flex: 1 1 400px;
      justify-content: flex-end;
    }
    .stat-card {
      background: white;
      border-radius: var(--radius-md);
      padding: 20px 18px;
      text-align: center;
      box-shadow: var(--shadow-card);
      min-width: 110px;
      animation: float 3s infinite ease-in-out;
    }
    .stat-card:nth-child(2) { animation-delay: 0.3s; }
    .stat-card:nth-child(3) { animation-delay: 0.6s; }
    @keyframes float {
      0% { transform: translateY(0); }
      50% { transform: translateY(-6px); }
      100% { transform: translateY(0); }
    }
    .stat-number {
      font-size: 32px;
      font-weight: 800;
      color: var(--energy-orange);
      font-feature-settings: "tnum";
      letter-spacing: -1px;
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-secondary);
      margin-top: 6px;
    }

    /* 通用板块 */
    .section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 36px;
      font-weight: 700;
      text-align: center;
      margin-bottom: 48px;
      color: var(--panda-black);
    }

    /* 数据看板 */
    .dashboard {
      background: #2A2A2A;
      color: white;
    }
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-bottom: 24px;
    }
    .metric-card {
      background: rgba(255,255,255,0.06);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
      backdrop-filter: blur(2px);
      transition: var(--transition-default);
      border: 1px solid transparent;
    }
    .metric-card:hover {
      border-color: var(--bamboo-green);
      transform: translateY(-4px);
    }
    .metric-icon {
      font-size: 32px;
      color: var(--bamboo-green);
      margin-bottom: 12px;
    }
    .metric-value {
      font-size: 36px;
      font-weight: 800;
      color: white;
      font-feature-settings: "tnum";
    }
    .metric-label {
      color: #aaa;
      font-size: 14px;
      margin-top: 8px;
    }
    .trend-line {
      text-align: center;
      color: var(--energy-orange);
      font-weight: 600;
    }

    /* 服务矩阵 错落高度 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: var(--transition-default);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .service-img {
      height: 180px;
      background-size: cover;
      background-position: center;
      transition: transform 0.3s;
    }
    .service-card:hover .service-img {
      transform: scale(1.03);
    }
    .service-body {
      padding: 24px;
      flex: 1;
    }
    .service-body h3 {
      font-size: 22px;
      margin-bottom: 12px;
    }
    .service-body p {
      color: var(--text-secondary);
      margin-bottom: 16px;
    }
    .text-link {
      color: var(--bamboo-green);
      font-weight: 600;
    }
    .card-tall { min-height: 520px; }
    .card-short { min-height: 440px; }
    .card-mid { min-height: 480px; }

    /* 对比 */
    .comparison-wrapper {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
    }
    .compare-col {
      flex: 1 1 350px;
      background: white;
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-card);
    }
    .compare-list {
      list-style: none;
      margin-top: 20px;
    }
    .compare-list li {
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .icon-x { color: #c00; font-weight: bold; }
    .icon-check { color: var(--bamboo-green); font-weight: bold; }
    .progress-bar-group {
      margin-top: 24px;
    }
    .progress-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }
    .progress-bg {
      flex: 1;
      height: 8px;
      background: #e0e0e0;
      border-radius: 4px;
      overflow: hidden;
    }
    .progress-fill {
      height: 100%;
      background: var(--bamboo-green);
      width: 0%;
      border-radius: 4px;
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      margin-bottom: 12px;
    }
    .faq-question {
      background: var(--panda-black);
      color: white;
      padding: 18px 24px;
      border-radius: var(--radius-sm);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
    }
    .faq-answer {
      background: white;
      border-left: 4px solid var(--bamboo-green);
      padding: 16px 24px;
      display: none;
      color: var(--text-secondary);
    }
    .faq-item.open .faq-answer {
      display: block;
    }

    /* 转化表单 */
    .cta-section {
      background: linear-gradient(135deg, #E8F5E9, #F5F7FA);
      text-align: center;
      padding: 80px 0;
    }
    .form-inline {
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
      margin: 32px 0 16px;
    }
    .form-inline input {
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      min-width: 260px;
      font-size: 16px;
      transition: 0.2s;
    }
    .form-inline input:focus {
      outline: none;
      border-color: var(--bamboo-green);
      box-shadow: 0 0 0 3px rgba(46,139,87,0.2);
    }
    .trust-badge {
      color: #666;
      font-size: 13px;
    }

    /* 页脚 */
    .site-footer {
      background: var(--panda-black);
      color: #ccc;
      padding: 48px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 32px;
    }
    .footer-brand {
      font-weight: 700;
      font-size: 20px;
      color: white;
      margin-bottom: 12px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--bamboo-green);
    }
    .copyright {
      text-align: center;
      margin-top: 32px;
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 16px;
      font-size: 14px;
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero h1 { font-size: 36px; }
      .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
      .services-grid { grid-template-columns: 1fr 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .hamburger { display: flex; }
      .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--panda-black);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
      }
      .nav-menu.active { display: flex; }
      .nav-link { color: white; }
      .hero { padding: 48px 0; }
      .hero h1 { font-size: 30px; }
      .hero-stats { justify-content: center; flex-wrap: wrap; }
      .services-grid { grid-template-columns: 1fr; }
      .dashboard-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }