/* roulang page: index */
:root {
      --primary: #1A5F3A;
      --primary-dark: #0F2B1D;
      --accent: #F5A623;
      --accent-hover: #E09510;
      --bg-light: #F7F8F9;
      --white: #FFFFFF;
      --gray-border: #E8EBED;
      --gray-text: #8C9BA5;
      --text-dark: #1E2D2F;
      --text-body: #3A4A4D;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-card: 0 2px 12px rgba(26, 95, 58, 0.06);
      --shadow-hover: 0 6px 20px rgba(26, 95, 58, 0.12);
      --transition: 0.2s ease;
      --container-max: 1200px;
    }
    
    * {
      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-body);
      line-height: 1.75;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }
    
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 排版 */
    h1 {
      font-size: 32px;
      line-height: 1.3;
      font-weight: 700;
      color: var(--text-dark);
    }
    h2 {
      font-size: 24px;
      line-height: 1.4;
      font-weight: 600;
      color: var(--text-dark);
    }
    h3 {
      font-size: 18px;
      line-height: 1.5;
      font-weight: 600;
      color: var(--text-dark);
    }
    p {
      margin-bottom: 1.2em;
      color: var(--text-body);
    }
    .small-text {
      font-size: 12px;
      line-height: 1.6;
      color: var(--gray-text);
    }
    
    a {
      text-decoration: none;
      color: inherit;
    }
    
    img {
      max-width: 100%;
      display: block;
    }
    
    /* 按钮 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 15px;
      transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.1s ease;
      cursor: pointer;
      border: 2px solid transparent;
      text-align: center;
    }
    .btn-primary {
      background-color: var(--accent);
      color: var(--white);
      border-color: var(--accent);
    }
    .btn-primary:hover {
      background-color: var(--accent-hover);
      border-color: var(--accent-hover);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
    }
    .btn-outline:hover {
      background: rgba(26, 95, 58, 0.05);
    }
    .btn-white {
      background: var(--white);
      color: var(--primary);
      border-color: var(--white);
    }
    .btn-white:hover {
      background: #f0f0f0;
    }
    
    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--gray-border);
      z-index: 100;
      padding: 12px 0;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      display: flex;
      align-items: baseline;
      gap: 4px;
      font-weight: 700;
      font-size: 22px;
      color: var(--primary);
      letter-spacing: 0.5px;
    }
    .logo span {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-body);
      margin-left: 4px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 4px 0;
      transition: color 0.2s;
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--primary);
    }
    .nav-menu a.active::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
    }
    .nav-cta {
      margin-left: 16px;
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
    }
    
    /* 区块间距 */
    section {
      padding: 80px 0;
    }
    
    /* Hero */
    .hero {
      background-image: linear-gradient(135deg, rgba(15, 43, 29, 0.75) 0%, rgba(26, 95, 58, 0.6) 100%), url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      color: white;
      padding: 140px 0 100px;
      margin-top: 0;
      text-align: left;
    }
    .hero h1 {
      color: white;
      font-size: 36px;
    }
    .hero .subtitle {
      font-size: 18px;
      color: rgba(255,255,255,0.85);
      margin: 16px 0 32px;
      max-width: 600px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    
    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 32px;
    }
    .stat-card {
      background: var(--primary-dark);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      color: white;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .stat-card i {
      font-size: 28px;
      color: rgba(255,255,255,0.5);
      margin-bottom: 16px;
    }
    .stat-number {
      font-size: 36px;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.2;
    }
    .stat-label {
      font-size: 14px;
      margin-top: 8px;
      color: rgba(255,255,255,0.8);
    }
    .dashboard-note {
      margin-top: 16px;
      color: var(--gray-text);
    }
    
    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 32px;
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: box-shadow 0.2s, transform 0.2s;
    }
    .service-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
    }
    .service-img {
      height: 140px;
      object-fit: cover;
      width: 100%;
    }
    .service-content {
      padding: 24px;
    }
    .service-content h3 {
      margin-bottom: 8px;
    }
    .tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 12px;
    }
    .tag {
      background: #EAF4EE;
      color: var(--primary);
      font-size: 12px;
      padding: 4px 12px;
      border-radius: 20px;
      font-weight: 500;
    }
    
    /* 对比区 */
    .comparison-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0;
      background: white;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      margin-top: 32px;
    }
    .compare-left, .compare-right {
      padding: 32px;
    }
    .compare-left {
      background: #f0f4f2;
      color: #6b7b7d;
    }
    .compare-right {
      background: #f9fdfb;
    }
    .compare-item {
      margin: 20px 0;
    }
    .progress-bar {
      background: #e0e4e2;
      height: 8px;
      border-radius: 4px;
      width: 100%;
      margin-top: 6px;
    }
    .progress-fill {
      background: var(--primary);
      height: 8px;
      border-radius: 4px;
      width: 0%;
    }
    .compare-right .progress-fill {
      background: var(--accent);
    }
    
    /* FAQ */
    .faq-list {
      margin-top: 24px;
    }
    .faq-item {
      border: 1px solid var(--gray-border);
      border-radius: var(--radius-card);
      margin-bottom: 12px;
      background: white;
      transition: border-color 0.2s;
    }
    .faq-item.active {
      border-color: var(--primary);
    }
    .faq-question {
      padding: 16px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding: 0 16px;
      color: var(--text-body);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 16px;
    }
    
    /* CTA */
    .cta-section {
      background: var(--primary-dark);
      color: white;
      text-align: center;
    }
    .cta-form {
      display: flex;
      max-width: 500px;
      margin: 24px auto 0;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .cta-input {
      flex: 1;
      padding: 12px 16px;
      border-radius: var(--radius-btn);
      border: 1px solid #5a7a6a;
      background: rgba(255,255,255,0.1);
      color: white;
      outline: none;
    }
    .cta-input::placeholder {
      color: rgba(255,255,255,0.6);
    }
    
    /* 页脚 */
    .footer {
      background: var(--primary-dark);
      color: #B0C4B8;
      padding: 48px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .footer a {
      color: #B0C4B8;
      display: block;
      margin-bottom: 8px;
    }
    .footer a:hover {
      color: var(--accent);
    }
    .copyright {
      margin-top: 32px;
      border-top: 1px solid #2a4a3a;
      padding-top: 16px;
      text-align: center;
      font-size: 13px;
    }
    
    /* 响应式 */
    @media (max-width: 768px) {
      h1 { font-size: 26px; }
      h2 { font-size: 20px; }
      section { padding: 48px 0; }
      .nav-menu { display: none; }
      .hamburger { display: block; }
      .mobile-menu {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        z-index: 99;
      }
      .mobile-menu.open {
        display: flex;
      }
      .dashboard-grid,
      .services-grid {
        grid-template-columns: 1fr;
      }
      .comparison-wrapper {
        grid-template-columns: 1fr;
      }
      .hero {
        padding: 120px 0 64px;
        text-align: center;
      }
      .hero-buttons {
        justify-content: center;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
    }