/* roulang page: index */
:root {
      --primary: #0F5132;
      --primary-hover: #198754;
      --accent: #EA580C;
      --accent-hover: #C2410C;
      --dark-navy: #0B132B;
      --text-main: #1E293B;
      --text-muted: #475569;
      --text-sub: #94A3B8;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --border-color: rgba(226, 232, 240, 0.9);
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 12px 24px -4px rgba(15, 81, 50, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --transition: all 0.25s ease;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-white);
      line-height: 1.75;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, h5, h6 {
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.02em;
      margin-bottom: 0.75rem;
    }
    p { margin-bottom: 1.25rem; }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary-hover); }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(8px);
      box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    }
    .header-primary-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 24px;
      border-bottom: 1px solid var(--border-color);
      max-width: 1280px;
      margin: 0 auto;
    }
    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .brand-logo-icon {
      width: 40px;
      height: 40px;
      background: var(--primary);
      color: #fff;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .header-info-actions {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .header-info-item {
      display: flex;
      flex-direction: column;
      font-size: 0.825rem;
      color: var(--text-muted);
      line-height: 1.3;
      text-align: right;
    }
    .header-info-item strong { color: var(--text-main); font-size: 0.95rem; }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: 9999px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      min-height: 44px;
    }
    .btn-accent {
      background-color: var(--accent);
      color: #ffffff;
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      color: #ffffff;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(234, 88, 12, 0.3);
    }
    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      color: #ffffff;
    }
    .btn-outline {
      background-color: transparent;
      border-color: #ffffff;
      color: #ffffff;
    }
    .btn-outline:hover {
      background-color: rgba(255,255,255,0.15);
      color: #ffffff;
    }

    .chip-nav-container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 8px 16px;
      display: flex;
      align-items: center;
      overflow-x: auto;
      white-space: nowrap;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
      gap: 10px;
    }
    .chip-nav-container::-webkit-scrollbar { display: none; }
    .chip-item {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: 9999px;
      font-size: 0.875rem;
      color: var(--text-muted);
      font-weight: 500;
      min-height: 38px;
    }
    .chip-item:hover, .chip-item.active {
      background: #E8F5E9;
      color: var(--primary);
      border-color: #A3D9A5;
    }

    .app-section {
      padding: 80px 20px;
      position: relative;
    }
    .section-bg-light { background-color: var(--bg-light); }
    .section-bg-dark { background-color: var(--dark-navy); color: #ffffff; }
    .section-bg-dark h2, .section-bg-dark h3, .section-bg-dark p { color: #ffffff; }
    .section-container {
      max-width: 1200px;
      margin: 0 auto;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.text-center { text-align: center; }
    .section-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 8px;
      background: rgba(234, 88, 12, 0.1);
      padding: 4px 10px;
      border-radius: 4px;
    }
    .section-title {
      font-size: 2.1rem;
      color: inherit;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 1.25rem;
    }
    .section-bg-dark .section-desc { color: var(--text-sub); }

    .hero-banner {
      position: relative;
      background-image: linear-gradient(rgba(11, 19, 43, 0.85), rgba(15, 81, 50, 0.82)), url('/assets/images/8efecec1799563bd.jpg');
      background-size: cover;
      background-position: center;
      padding: 120px 20px 100px;
      color: #ffffff;
    }
    .hero-content {
      max-width: 900px;
      margin: 0 auto;
      text-align: center;
    }
    .hero-badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(4px);
      padding: 6px 16px;
      border-radius: 9999px;
      font-size: 0.875rem;
      color: #F8FAFC;
      margin-bottom: 24px;
      border: 1px solid rgba(255, 255, 255, 0.25);
    }
    .hero-title {
      font-size: 2.85rem;
      line-height: 1.25;
      color: #ffffff;
      margin-bottom: 24px;
    }
    .hero-desc {
      font-size: 1.15rem;
      line-height: 1.8;
      color: #E2E8F0;
      margin-bottom: 36px;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-sub-series {
      margin-top: 48px;
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      border-top: 1px solid rgba(255,255,255,0.15);
      padding-top: 32px;
    }
    .series-nav-btn {
      color: #E2E8F0;
      background: rgba(255, 255, 255, 0.1);
      padding: 8px 18px;
      border-radius: 6px;
      font-size: 0.875rem;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .series-nav-btn:hover {
      background: #ffffff;
      color: var(--primary);
    }

    .card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      overflow: hidden;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
      border-color: rgba(15, 81, 50, 0.3);
    }
    .card-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .card-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: #E8F5E9;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 16px;
    }

    .split-layout {
      display: flex;
      align-items: center;
      gap: 48px;
      flex-wrap: wrap;
    }
    .split-col {
      flex: 1;
      min-width: 320px;
    }
    .media-card-img {
      width: 100%;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      object-fit: cover;
      display: block;
    }

    .stat-counter-strip {
      background: var(--primary);
      color: #ffffff;
      padding: 48px 20px;
    }
    .stat-item {
      text-align: center;
      padding: 12px;
    }
    .stat-number {
      font-size: 2.85rem;
      font-weight: 800;
      color: #FACC15;
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .stat-label {
      font-size: 0.95rem;
      color: #E2E8F0;
    }

    .quote-box {
      border-left: 4px solid var(--accent);
      padding: 16px 20px;
      background: #FFF7ED;
      margin: 16px 0;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      font-style: italic;
    }

    .flow-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 24px;
      position: relative;
    }
    .flow-step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .step-badge {
      width: 32px;
      height: 32px;
      background: var(--primary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
      margin-bottom: 16px;
    }

    .accordion-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      background: #ffffff;
      overflow: hidden;
    }
    .accordion-header {
      padding: 18px 24px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }
    .accordion-header:hover {
      background: var(--bg-light);
    }
    .accordion-content {
      padding: 0 24px 20px;
      display: none;
      color: var(--text-muted);
      border-top: 1px solid #F1F5F9;
    }
    .accordion-content.open { display: block; }

    .contact-form-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 36px;
      box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
      border: 1px solid var(--border-color);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.95rem;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(15, 81, 50, 0.15);
    }

    .site-footer {
      background: var(--dark-navy);
      color: #94A3B8;
      padding: 64px 20px 32px;
      border-top: 1px solid rgba(255,255,255,0.1);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 36px;
      max-width: 1200px;
      margin: 0 auto 48px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      margin-bottom: 18px;
    }
    .footer-nav-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-nav-list li { margin-bottom: 10px; }
    .footer-nav-list a {
      color: #94A3B8;
      font-size: 0.9rem;
    }
    .footer-nav-list a:hover { color: #ffffff; }
    .footer-bottom {
      max-width: 1200px;
      margin: 0 auto;
      padding-top: 24px;
      border-top: 1px solid rgba(255,255,255,0.1);
      text-align: center;
      font-size: 0.85rem;
    }

    .fixed-conversion-strip {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(15, 81, 50, 0.96);
      backdrop-filter: blur(8px);
      color: #ffffff;
      z-index: 999;
      padding: 10px 20px;
      box-shadow: 0 -4px 12px rgba(0,0,0,0.15);
      display: flex;
      justify-content: space-around;
      align-items: center;
      border-top: 1px solid rgba(255,255,255,0.2);
    }
    .fixed-conversion-text {
      font-size: 0.925rem;
      font-weight: 500;
    }

    @media (max-width: 768px) {
      .hero-title { font-size: 2rem; }
      .header-info-item { display: none; }
      .app-section { padding: 56px 16px; }
      .fixed-conversion-text { display: none; }
      .split-layout { gap: 24px; }
    }