/* roulang page: index */
*, *::before, *::after {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --primary-green: #1B8A3D;
      --primary-green-dark: #157032;
      --accent-neon: #C8FF00;
      --text-dark: #0F1A2E;
      --white-pure: #FFFFFF;
      --bg-light: #F5F7FA;
      --text-gray: #5A6A7E;
      --border-light: #E2E8F0;
      --orange-peel: #FF6B35;
      --card-shadow: 0 4px 16px rgba(15, 26, 46, 0.06);
      --card-hover-shadow: 0 12px 28px rgba(15, 26, 46, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --anim-smooth: all 0.25s ease;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, sans-serif;
      --container-max: 1200px;
    }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 72px;
    }

    body {
      font-family: var(--font-sans);
      line-height: 1.75;
      font-size: 16px;
      color: var(--text-dark);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    h1, h2, h3, h4 {
      font-weight: 600;
      line-height: 1.3;
    }

    h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
    h2 {
      font-size: 2rem;
      display: inline-block;
      position: relative;
      padding-bottom: 0.5rem;
      margin-bottom: 2rem;
    }
    h2::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 48px;
      height: 4px;
      background-color: var(--primary-green);
      border-radius: 2px;
    }
    h3 { font-size: 1.25rem; }

    .container {
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    section {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      padding: 0.85rem 2rem;
      cursor: pointer;
      transition: var(--anim-smooth);
      font-size: 0.95rem;
      border: 2px solid transparent;
      letter-spacing: 0.3px;
    }

    .btn-primary {
      background-color: var(--primary-green);
      color: var(--white-pure);
      box-shadow: 0 6px 20px rgba(27, 138, 61, 0.3);
    }
    .btn-primary:hover {
      background-color: var(--primary-green-dark);
      transform: translateY(-2px);
      box-shadow: 0 15px 30px rgba(27, 138, 61, 0.4);
    }

    .btn-secondary {
      background: transparent;
      border-color: var(--primary-green);
      color: var(--primary-green);
    }
    .btn-secondary:hover {
      background-color: var(--primary-green);
      color: var(--white-pure);
      transform: translateY(-2px);
    }

    .btn-accent {
      background-color: var(--accent-neon);
      color: var(--text-dark);
      font-weight: 700;
      border: none;
      box-shadow: 0 6px 16px rgba(200, 255, 0, 0.4);
    }
    .btn-accent:hover {
      filter: brightness(1.1);
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(200, 255, 0, 0.5);
    }

    /* 导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background-color: var(--white-pure);
      backdrop-filter: blur(4px);
      background: rgba(255,255,255,0.92);
      transition: box-shadow 0.2s;
    }
    .header-shadow {
      box-shadow: 0 2px 16px rgba(0,0,0,0.05);
    }
    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 64px;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    .logo {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--primary-green);
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }
    .logo i {
      font-size: 1.9rem;
    }
    .nav-list {
      display: flex;
      gap: 2rem;
      align-items: center;
      list-style: none;
    }
    .nav-list a {
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 0.4rem 0;
    }
    .nav-list a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 3px;
      background: var(--primary-green);
      border-radius: 5px;
      transition: width 0.25s;
    }
    .nav-list a:hover::after,
    .nav-list a.active::after {
      width: 100%;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--text-dark);
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(255,255,255,0.98);
      flex-direction: column;
      justify-content: center;
      align-items: center;
      z-index: 99;
    }
    .mobile-menu.active {
      display: flex;
    }
    .mobile-menu a {
      font-size: 1.5rem;
      margin: 1rem 0;
    }
    .close-menu {
      position: absolute;
      top: 2rem;
      right: 2rem;
      background: none;
      border: none;
      font-size: 2rem;
    }

    /* Hero */
    .hero {
      min-height: 90vh;
      display: flex;
      align-items: center;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      color: white;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 20%, rgba(27,138,61,0.75) 0%, #0A2E14 95%);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 650px;
    }
    .hero h1 {
      color: white;
      font-weight: 800;
    }
    .hero .subtitle {
      font-size: 1.15rem;
      color: rgba(255,255,255,0.9);
      margin: 1.5rem 0 2rem;
      max-width: 560px;
    }
    .floating-card {
      position: absolute;
      right: 5%;
      bottom: 10%;
      background: rgba(255,255,255,0.15);
      backdrop-filter: blur(16px);
      border-radius: var(--radius-md);
      padding: 1.25rem 1.5rem;
      color: white;
      border: 1px solid rgba(255,255,255,0.25);
      z-index: 3;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 0.8rem;
    }

    /* 指标看板 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      background: var(--text-dark);
      padding: 3rem 2rem;
      border-radius: var(--radius-lg);
      margin-top: -3rem;
      position: relative;
      z-index: 5;
      box-shadow: 0 15px 40px rgba(0,0,0,0.25);
    }
    .stat-item {
      text-align: center;
      color: white;
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent-neon);
      margin-bottom: 0.3rem;
    }
    .stat-label {
      font-size: 0.9rem;
      opacity: 0.85;
    }

    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .service-card {
      background: var(--white-pure);
      padding: 2rem 1.6rem;
      border-radius: var(--radius-md);
      box-shadow: var(--card-shadow);
      transition: var(--anim-smooth);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
    }
    .service-icon {
      width: 64px;
      height: 64px;
      background-color: #E8F5EC;
      border-radius: var(--radius-sm);
      margin-bottom: 1.5rem;
      overflow: hidden;
    }
    .service-icon img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .arrow-link {
      margin-top: 1rem;
      font-weight: 600;
      color: var(--primary-green);
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      transition: gap 0.2s;
    }
    .service-card:hover .arrow-link {
      gap: 0.6rem;
    }

    /* 对比 */
    .comparison-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }
    .compare-column {
      background: white;
      border-radius: var(--radius-md);
      padding: 2rem;
      
    }
    .left-col {
      border-left: 5px solid #B0BEC5;
      background: #f9fbfd;
    }
    .right-col {
      border-left: 5px solid var(--primary-green);
      background: #f4fdf7;
    }
    .compare-row {
      display: flex;
      align-items: center;
      margin-bottom: 1.8rem;
    }
    .progress-bg {
      flex:1; background:#eee; height:8px; border-radius:4px; margin:0 1rem;
    }
    .progress-fill {
      height:8px; border-radius:4px; background:var(--primary-green);
    }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: var(--radius-md);
      margin-bottom: 1rem;
      box-shadow: var(--card-shadow);
    }
    .faq-question {
      padding: 1.2rem 1.5rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: 0.3s;
      background: #F0F9F3;
      padding: 0 1.5rem;
    }
    .faq-answer.open {
      max-height: 200px;
      padding: 1rem 1.5rem;
    }

    .contact-form {
      background: #EAF5ED;
      border-radius: var(--radius-lg);
      padding: 2.5rem;
      max-width: 700px;
      margin: auto;
    }
    .form-input {
      width: 100%;
      padding: 0.9rem;
      margin-bottom: 1.2rem;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
    }

    footer {
      background: var(--text-dark);
      color: #B0BEC5;
      padding: 3rem 0 0;
    }

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

    @media (max-width: 768px) {
      .nav-list { display: none; }
      .menu-toggle { display: block; }
      h1 { font-size: 2rem; }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: 1fr; }
      .hero { min-height: 75vh; }
    }