/* roulang page: index */
:root {
      --primary: #0D3B36;
      --primary-dark: #082623;
      --primary-light: #16534C;
      --secondary: #C59B27;
      --secondary-hover: #AA821C;
      --bg-body: #F8F9FA;
      --bg-surface: #FFFFFF;
      --bg-dark: #0A1C1A;
      --bg-muted: #F0F4F3;
      --text-main: #111827;
      --text-body: #374151;
      --text-muted: #6B7280;
      --border-color: #E5E7EB;
      --border-dark: #1E3A36;
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
      --shadow-lift: 0 12px 24px -4px rgba(13, 59, 54, 0.08);
      --container-max: 1240px;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-body);
      color: var(--text-body);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; transition: all 0.2s ease; }
    button, input, select, textarea { font: inherit; }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    .topbar {
      background-color: var(--primary-dark);
      color: #A3BFBC;
      font-size: 0.825rem;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 6px 0;
    }
    .topbar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .topbar-items { display: flex; gap: 20px; align-items: center; }
    .site-header {
      background-color: rgba(255,255,255,0.98);
      backdrop-filter: blur(8px);
      position: sticky;
      top: 0;
      z-index: 100;
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .navbar {
      height: 74px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.02em;
    }
    .brand-logo svg { width: 30px; height: 30px; fill: var(--primary); }
    .nav-menu { display: flex; align-items: center; gap: 28px; list-style: none; }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 6px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active { color: var(--primary); }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--secondary);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after, .nav-link.active::after { width: 100%; }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      border-radius: var(--radius-sm);
      padding: 10px 22px;
      font-size: 0.95rem;
      cursor: pointer;
      transition: all 0.2s ease;
      border: 1px solid transparent;
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #fff;
    }
    .btn-primary:hover {
      background-color: var(--secondary);
      color: #fff;
    }
    .btn-secondary {
      background-color: #fff;
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-secondary:hover {
      background-color: var(--bg-muted);
    }
    .btn-accent {
      background-color: var(--secondary);
      color: #fff;
    }
    .btn-accent:hover {
      background-color: var(--secondary-hover);
    }
    .hero-search-hub {
      position: relative;
      background: linear-gradient(180deg, #EBF3F1 0%, #F8F9FA 100%);
      padding: 80px 0 60px;
      border-bottom: 1px solid var(--border-color);
      background-image: radial-gradient(circle at 10% 20%, rgba(13, 59, 54, 0.04) 0%, transparent 40%),
                        radial-gradient(circle at 90% 80%, rgba(197, 155, 39, 0.05) 0%, transparent 40%);
    }
    .hero-inner {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }
    .hero-badge {
      display: inline-block;
      padding: 4px 14px;
      background-color: rgba(13, 59, 54, 0.08);
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 20px;
    }
    .hero-title {
      font-size: 2.6rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }
    .hero-desc {
      font-size: 1.05rem;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 36px;
    }
    .search-box-wrapper {
      background: #FFFFFF;
      padding: 8px;
      border-radius: var(--radius-md);
      box-shadow: 0 10px 25px -5px rgba(13, 59, 54, 0.12);
      border: 1px solid #D1D5DB;
      display: flex;
      gap: 8px;
      max-width: 720px;
      margin: 0 auto 20px;
    }
    .search-input {
      flex: 1;
      border: none;
      outline: none;
      padding: 12px 18px;
      font-size: 1rem;
      color: var(--text-main);
    }
    .hot-chips {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      align-items: center;
      gap: 10px;
      font-size: 0.875rem;
      color: var(--text-muted);
    }
    .chip {
      background-color: #fff;
      border: 1px solid var(--border-color);
      padding: 4px 12px;
      border-radius: 16px;
      color: var(--text-body);
      transition: all 0.2s;
    }
    .chip:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .section-pad {
      padding: 80px 0;
    }
    .section-head {
      margin-bottom: 50px;
    }
    .section-head.center { text-align: center; max-width: 780px; margin-left: auto; margin-right: auto; }
    .section-tag {
      font-size: 0.825rem;
      text-transform: uppercase;
      font-weight: 700;
      color: var(--secondary);
      letter-spacing: 0.08em;
      margin-bottom: 10px;
      display: block;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-body);
      line-height: 1.7;
    }
    .kpi-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .kpi-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
    .kpi-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 8px;
      font-feature-settings: "tnum";
    }
    .kpi-label {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .kpi-sub {
      font-size: 0.825rem;
      color: var(--text-muted);
      line-height: 1.4;
    }
    .suite-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .suite-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .suite-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lift);
    }
    .suite-card.highlight {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-lift);
    }
    .suite-badge {
      position: absolute;
      top: -12px;
      right: 28px;
      background: var(--secondary);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 12px;
      border-radius: 12px;
    }
    .suite-name {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .suite-text {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.6;
      margin-bottom: 24px;
      min-height: 60px;
    }
    .suite-features {
      list-style: none;
      margin-bottom: 32px;
      flex: 1;
    }
    .suite-features li {
      position: relative;
      padding-left: 22px;
      font-size: 0.875rem;
      color: var(--text-body);
      margin-bottom: 10px;
      line-height: 1.5;
    }
    .suite-features li::before {
      content: '✓';
      position: absolute;
      left: 0;
      color: var(--primary);
      font-weight: 700;
    }
    .table-box {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
    }
    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.925rem;
    }
    .comp-table th, .comp-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .comp-table th {
      background-color: #F9FAFB;
      font-weight: 700;
      color: var(--text-main);
    }
    .comp-table tr:last-child td { border-bottom: none; }
    .comp-table .col-sys {
      background-color: rgba(13, 59, 54, 0.03);
      font-weight: 600;
      color: var(--primary);
    }
    .two-col-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .spec-sheet {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .spec-row {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px dashed var(--border-color);
      font-size: 0.9rem;
    }
    .spec-row:last-child { border-bottom: none; }
    .spec-k { color: var(--text-muted); }
    .spec-v { font-weight: 600; color: var(--text-main); text-align: right; }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .card-base {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: all 0.2s ease;
    }
    .card-base:hover {
      box-shadow: var(--shadow-lift);
      border-color: rgba(13, 59, 54, 0.2);
    }
    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 0.885rem;
      color: var(--text-body);
      line-height: 1.6;
    }
    .card-img-wrap {
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 16px;
      height: 180px;
    }
    .card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: #D1D5DB;
    }
    .section-dark .section-title { color: #FFFFFF; }
    .section-dark .section-desc { color: #9CA3AF; }
    .section-dark .card-base {
      background: #112826;
      border-color: var(--border-dark);
      color: #D1D5DB;
    }
    .section-dark .card-title { color: #FFFFFF; }
    .section-dark .card-text { color: #9CA3AF; }
    .timeline {
      position: relative;
      border-left: 2px solid var(--border-color);
      padding-left: 28px;
      margin-left: 10px;
    }
    .timeline-item {
      position: relative;
      margin-bottom: 32px;
    }
    .timeline-item:last-child { margin-bottom: 0; }
    .timeline-dot {
      position: absolute;
      left: -35px;
      top: 4px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--primary);
      border: 2px solid #fff;
    }
    .timeline-year {
      font-size: 0.825rem;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 4px;
    }
    .timeline-tit {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .timeline-txt {
      font-size: 0.875rem;
      color: var(--text-body);
      line-height: 1.55;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.45;
      margin-bottom: 12px;
    }
    .news-title:hover { color: var(--primary); }
    .news-excerpt {
      font-size: 0.875rem;
      color: var(--text-body);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-item details summary {
      padding: 18px 22px;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background 0.2s;
    }
    .faq-item details summary::-webkit-details-marker { display: none; }
    .faq-item details summary::after {
      content: '+';
      font-size: 1.25rem;
      font-weight: 400;
      color: var(--primary);
    }
    .faq-item details[open] summary::after {
      content: '−';
    }
    .faq-item details[open] summary {
      border-bottom: 1px solid var(--border-color);
      border-left: 4px solid var(--primary);
      background-color: var(--bg-muted);
    }
    .faq-content {
      padding: 18px 22px;
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.7;
    }
    .cta-form-strip {
      background-color: var(--primary);
      color: #fff;
      border-radius: var(--radius-lg);
      padding: 48px 40px;
    }
    .cta-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .cta-text h3 {
      font-size: 1.85rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 12px;
    }
    .cta-text p {
      font-size: 0.95rem;
      color: #C1D5D2;
      line-height: 1.6;
    }
    .eval-form {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .eval-form .form-group.full { grid-column: span 2; }
    .form-control {
      width: 100%;
      padding: 11px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255,255,255,0.2);
      background: rgba(255,255,255,0.08);
      color: #fff;
      font-size: 0.9rem;
      outline: none;
    }
    .form-control::placeholder { color: #8BA8A4; }
    .form-control:focus {
      background: rgba(255,255,255,0.15);
      border-color: var(--secondary);
    }
    .site-footer {
      background-color: #081B19;
      color: #8C9E9C;
      font-size: 0.875rem;
      padding: 60px 0 30px;
      border-top: 1px solid rgba(255,255,255,0.06);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.65;
      font-size: 0.85rem;
      margin-bottom: 16px;
    }
    .footer-col h5 {
      font-size: 0.95rem;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-links { list-style: none; }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a:hover { color: #FFFFFF; }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.06);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8rem;
    }
    @media (max-width: 1024px) {
      .kpi-grid { grid-template-columns: repeat(2, 1fr); }
      .suite-grid { grid-template-columns: 1fr; }
      .two-col-grid { grid-template-columns: 1fr; }
      .cta-inner { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .topbar { display: none; }
      .navbar { height: 64px; }
      .nav-menu { display: none; }
      .hero-title { font-size: 1.85rem; }
      .section-title { font-size: 1.5rem; }
      .grid-3, .grid-2 { grid-template-columns: 1fr; }
      .eval-form { grid-template-columns: 1fr; }
      .eval-form .form-group.full { grid-column: span 1; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }