/* roulang page: index */
:root {
      --primary: #0B3D2E;
      --primary-soft: #E8F0ED;
      --accent: #D42E2E;
      --accent-hover: #B22222;
      --bg: #F7F8F6;
      --white: #FFFFFF;
      --text: #1A1A1A;
      --text-secondary: #5C5C5C;
      --border-light: #D9D9D9;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --shadow-card: 0 2px 16px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.08);
      --transition: 0.3s ease;
      --font-stack: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --max-width: 1200px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-stack);
      background: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      display: block;
    }
    button, input {
      font-family: inherit;
    }
    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: var(--white);
      border-bottom: 1px solid rgba(0,0,0,0.05);
      z-index: 1000;
      height: 72px;
      transition: box-shadow 0.3s;
    }
    .site-header.scrolled {
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }
    .logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .logo span {
      color: var(--accent);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text);
      transition: color 0.2s;
      position: relative;
    }
    .nav-menu a:hover {
      color: var(--primary);
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 15px;
      border: none;
      cursor: pointer;
      transition: background 0.25s, transform 0.25s;
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      transform: scale(1.03);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: 0.25s;
      display: inline-block;
    }
    .btn-outline:hover {
      background: var(--primary-soft);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }
    .hamburger span {
      width: 25px;
      height: 2.5px;
      background: var(--primary);
      border-radius: 2px;
    }
    @media (max-width: 768px) {
      .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        height: 100vh;
        background: var(--primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 40px;
        transition: 0.4s ease;
        backdrop-filter: blur(10px);
      }
      .nav-menu.active {
        right: 0;
      }
      .nav-menu a {
        color: white;
        font-size: 20px;
      }
      .hamburger {
        display: flex;
        z-index: 1001;
      }
    }
    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }
    /* Hero */
    #hero {
      margin-top: 72px;
      background: linear-gradient(135deg, #F0F4F2 0%, #FFFFFF 100%);
      min-height: 90vh;
      display: flex;
      align-items: center;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .hero-title {
      font-size: 48px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--primary);
      line-height: 1.2;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-secondary);
      margin: 24px 0 32px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-visual {
      background: url('/assets/images/backpic/hero-dashboard.jpg') center/cover no-repeat;
      height: 400px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-hover);
    }
    .floating-stats {
      display: flex;
      justify-content: center;
      background: rgba(11,61,46,0.9);
      backdrop-filter: blur(8px);
      border-radius: 60px;
      padding: 16px 32px;
      margin-top: -40px;
      position: relative;
      z-index: 2;
      gap: 32px;
      flex-wrap: wrap;
    }
    .stat-item {
      display: flex;
      align-items: baseline;
      gap: 6px;
      color: white;
    }
    .stat-number {
      font-size: 32px;
      font-weight: 700;
    }
    .stat-label {
      font-size: 14px;
      color: #A9CBBF;
    }
    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero-visual {
        height: 280px;
        order: -1;
      }
      .hero-title {
        font-size: 32px;
      }
      .floating-stats {
        gap: 20px;
        padding: 12px 24px;
      }
    }
    /* 指标卡 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }
    .metric-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      text-align: center;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .metric-value {
      font-size: 40px;
      font-weight: 700;
      color: var(--primary);
    }
    .metric-label {
      color: var(--text-secondary);
      margin-top: 8px;
    }
    @media (max-width: 768px) {
      .metrics-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 服务体系 */
    .section-title {
      font-size: 36px;
      font-weight: 600;
      text-align: center;
      margin-bottom: 48px;
      color: var(--primary);
    }
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .service-img {
      height: 200px;
      object-fit: cover;
    }
    .service-body {
      padding: 24px;
    }
    .service-name {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .service-desc {
      color: var(--text-secondary);
      font-size: 15px;
    }
    @media (max-width: 768px) {
      .service-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 对比 */
    .compare-wrapper {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 24px;
      align-items: center;
    }
    .compare-col {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 32px;
    }
    .compare-col.traditional {
      background: #F2F2F2;
    }
    .compare-col.huatiyu {
      background: #F0F7F4;
      border: 1px solid var(--primary);
    }
    .compare-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 16px;
    }
    .vs-divider {
      font-size: 24px;
      font-weight: 700;
      color: var(--accent);
    }
    @media (max-width: 768px) {
      .compare-wrapper {
        grid-template-columns: 1fr;
      }
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 16px 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 18px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: 0.4s ease;
      padding-left: 8px;
      border-left: 3px solid var(--primary);
      margin-top: 8px;
      color: var(--text-secondary);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 12px 0 12px 16px;
    }
    /* CTA */
    #cta {
      background: var(--primary);
      color: white;
      text-align: center;
    }
    .cta-form {
      max-width: 480px;
      margin: 32px auto 0;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .cta-input {
      height: 48px;
      border-radius: 6px;
      border: 1px solid var(--border-light);
      padding: 0 16px;
      font-size: 16px;
      outline: none;
    }
    .cta-input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(11,61,46,0.2);
    }
    .btn-submit {
      background: var(--accent);
      color: white;
      height: 52px;
      border: none;
      border-radius: 6px;
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      position: relative;
      overflow: hidden;
    }
    .btn-submit::after {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
      transition: 0.5s;
    }
    .btn-submit:hover::after {
      left: 100%;
    }
    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    .footer-links a {
      display: block;
      color: var(--text-secondary);
      margin-bottom: 8px;
    }
    .copyright {
      border-top: 1px solid #E0E0E0;
      margin-top: 40px;
      padding-top: 24px;
      text-align: center;
      color: var(--text-secondary);
      font-size: 14px;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }