:root {
      --primary: #1254eb;
      --primary-hover: #083ecc;
      --accent: #ff4d2e;
      --accent-soft: #fff1ef;
      --sun: #ffaa00;
      --dark: #0e1726;
      --gray-deep: #2d3748;
      --gray-mid: #5a6a85;
      --gray-light: #f4f6fb;
      --card-bg: #ffffff;
      --border-color: #e2e8f0;
      --radius: 12px;
      --radius-lg: 20px;
      --shadow: 0 10px 30px rgba(18, 84, 235, 0.08);
      --shadow-hover: 0 18px 40px rgba(18, 84, 235, 0.14);
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: var(--font);
      background-color: #f8fafc;
      color: var(--gray-deep);
      line-height: 1.6;
      overflow-x: hidden;
      min-width: 320px;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .header-bar {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap .ai-page-logo {
      height: 38px;
      width: auto;
    }
    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--dark);
      letter-spacing: -0.5px;
    }
    .brand-tag {
      background: var(--accent);
      color: #fff;
      font-size: 0.72rem;
      padding: 2px 7px;
      border-radius: 4px;
      font-weight: 600;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 0.94rem;
      font-weight: 500;
      color: var(--gray-deep);
      padding: 8px 12px;
      border-radius: 6px;
      display: inline-block;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background: var(--gray-light);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .nav-btn {
      padding: 9px 18px;
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-primary {
      background: var(--primary);
      color: #ffffff;
      border: 1px solid var(--primary);
      box-shadow: 0 4px 12px rgba(18, 84, 235, 0.25);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
    }
    .btn-accent {
      background: var(--accent);
      color: #ffffff;
      border: 1px solid var(--accent);
      box-shadow: 0 4px 14px rgba(255, 77, 46, 0.25);
    }
    .btn-accent:hover {
      background: #e23b1e;
      transform: translateY(-1px);
    }
    .btn-outline {
      background: #ffffff;
      color: var(--primary);
      border: 1px solid var(--primary);
    }
    .btn-outline:hover {
      background: var(--gray-light);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }
    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--dark);
      margin: 5px 0;
      transition: all 0.3s;
    }
    .hero-section {
      background: radial-gradient(circle at 10% 20%, rgba(255, 77, 46, 0.07) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(18, 84, 235, 0.08) 0%, transparent 45%),
                  linear-gradient(180deg, #ffffff 0%, #f4f7fc 100%);
      padding: 70px 0 60px;
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid #ffd1c8;
      color: var(--accent);
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 22px;
      box-shadow: 0 4px 12px rgba(255, 77, 46, 0.08);
    }
    .hero-title {
      font-size: clamp(2rem, 4.2vw, 3.2rem);
      font-weight: 900;
      color: var(--dark);
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }
    .hero-title .highlight-text {
      color: var(--primary);
      position: relative;
      display: inline-block;
    }
    .hero-desc {
      font-size: clamp(1rem, 1.6vw, 1.2rem);
      color: var(--gray-mid);
      max-width: 820px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-cta-group .btn-main {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: 10px;
    }
    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      max-width: 1020px;
      margin: 0 auto;
    }
    .metric-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-top: 4px solid var(--primary);
      border-radius: var(--radius);
      padding: 22px 16px;
      text-align: center;
      box-shadow: var(--shadow);
      transition: transform 0.25s ease;
    }
    .metric-item:nth-child(2) { border-top-color: var(--accent); }
    .metric-item:nth-child(3) { border-top-color: var(--sun); }
    .metric-item:nth-child(4) { border-top-color: #10b981; }
    .metric-item:hover {
      transform: translateY(-4px);
    }
    .metric-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 4px;
    }
    .metric-label {
      font-size: 0.88rem;
      color: var(--gray-mid);
      font-weight: 500;
    }
    .section-wrap {
      padding: 70px 0;
    }
    .section-wrap.alt-bg {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 46px;
    }
    .section-eyebrow {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--accent);
      background: var(--accent-soft);
      padding: 4px 14px;
      border-radius: 30px;
      margin-bottom: 10px;
    }
    .section-title {
      font-size: clamp(1.65rem, 2.6vw, 2.2rem);
      font-weight: 800;
      color: var(--dark);
      line-height: 1.35;
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 0.98rem;
      color: var(--gray-mid);
      line-height: 1.65;
    }
    .platform-intro-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      align-items: center;
    }
    .platform-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 34px;
      box-shadow: var(--shadow);
    }
    .platform-card h3 {
      font-size: 1.45rem;
      color: var(--dark);
      margin-bottom: 16px;
      font-weight: 800;
    }
    .platform-card p {
      color: var(--gray-deep);
      margin-bottom: 16px;
      font-size: 0.96rem;
      line-height: 1.7;
    }
    .feature-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 20px;
    }
    .feature-tag {
      background: #eef4ff;
      color: var(--primary);
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 600;
    }
    .model-logos-panel {
      background: linear-gradient(145deg, #101a2e, #1c2b48);
      border-radius: var(--radius-lg);
      padding: 32px;
      color: #ffffff;
      box-shadow: 0 16px 36px rgba(16, 26, 46, 0.16);
    }
    .model-logos-panel h4 {
      font-size: 1.15rem;
      margin-bottom: 14px;
      color: #93c5fd;
      font-weight: 700;
    }
    .model-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .model-chip {
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.16);
      color: #ffffff;
      font-size: 0.8rem;
      padding: 5px 11px;
      border-radius: 6px;
      font-weight: 500;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
      transition: all 0.28s ease;
      position: relative;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: #bfdbfe;
    }
    .service-icon {
      width: 46px;
      height: 46px;
      border-radius: 10px;
      background: var(--gray-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 14px;
    }
    .service-card:nth-child(3n+1) .service-icon { background: #eff6ff; color: var(--primary); }
    .service-card:nth-child(3n+2) .service-icon { background: var(--accent-soft); color: var(--accent); }
    .service-card:nth-child(3n+3) .service-icon { background: #fef3c7; color: #d97706; }
    .service-card h4 {
      font-size: 1.12rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }
    .service-card p {
      font-size: 0.88rem;
      color: var(--gray-mid);
      line-height: 1.6;
      flex-grow: 1;
    }
    .service-card .card-footer-action {
      margin-top: 14px;
      padding-top: 12px;
      border-top: 1px dashed var(--border-color);
      font-size: 0.84rem;
      font-weight: 600;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 24px;
    }
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      display: flex;
      flex-direction: column;
    }
    .media-img-wrap {
      width: 100%;
      height: 220px;
      background-color: #e2e8f0;
      overflow: hidden;
    }
    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .media-card:hover .media-img-wrap img {
      transform: scale(1.04);
    }
    .media-body {
      padding: 22px;
      flex-grow: 1;
    }
    .media-body h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }
    .media-body p {
      font-size: 0.9rem;
      color: var(--gray-mid);
      line-height: 1.6;
    }
    .steps-container {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 20px;
      text-align: center;
      position: relative;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.02);
    }
    .step-badge {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.95rem;
      margin: 0 auto 14px;
    }
    .step-card:nth-child(2) .step-badge { background: var(--accent); }
    .step-card:nth-child(3) .step-badge { background: var(--sun); }
    .step-card:nth-child(4) .step-badge { background: #10b981; }
    .step-card h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 0.86rem;
      color: var(--gray-mid);
      line-height: 1.55;
    }
    .compare-table-wrap {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow);
    }
    .compare-highlight-card {
      background: linear-gradient(135deg, #1254eb 0%, #0a3399 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 24px 30px;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .rating-badge {
      font-size: 2.2rem;
      font-weight: 900;
      color: #ffeb3b;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .rating-stars {
      color: #ffaa00;
      font-size: 1.3rem;
      letter-spacing: 2px;
    }
    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    table.compare-table th,
    table.compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }
    table.compare-table th {
      background: #f8fafc;
      color: var(--dark);
      font-weight: 700;
    }
    table.compare-table tr:hover td {
      background: #fafcff;
    }
    .cell-highlight {
      font-weight: 700;
      color: var(--primary);
      background: #f0f7ff;
    }
    .tag-success {
      display: inline-block;
      padding: 3px 8px;
      background: #dcfce7;
      color: #166534;
      border-radius: 4px;
      font-size: 0.78rem;
      font-weight: 600;
    }
    .tag-gray {
      display: inline-block;
      padding: 3px 8px;
      background: #f1f5f9;
      color: #64748b;
      border-radius: 4px;
      font-size: 0.78rem;
    }
    .form-panel-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: start;
    }
    .form-info-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 34px;
      box-shadow: var(--shadow);
    }
    .form-info-box h3 {
      font-size: 1.45rem;
      color: var(--dark);
      margin-bottom: 14px;
      font-weight: 800;
    }
    .contact-item-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 0.95rem;
      color: var(--gray-deep);
    }
    .contact-badge {
      width: 34px;
      height: 34px;
      border-radius: 8px;
      background: #eff6ff;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.85rem;
      flex-shrink: 0;
    }
    .booking-form {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--dark);
      margin-bottom: 6px;
    }
    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.92rem;
      font-family: inherit;
      color: var(--gray-deep);
      background: #ffffff;
      transition: border-color 0.2s;
    }
    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(18, 84, 235, 0.12);
    }
    .form-textarea {
      resize: vertical;
      min-height: 96px;
    }
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.02);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 0.92rem;
      color: var(--gray-deep);
      line-height: 1.65;
      margin-bottom: 16px;
      position: relative;
    }
    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }
    .review-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #dbeafe;
      color: var(--primary);
      font-weight: 800;
      font-size: 1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .review-meta h5 {
      font-size: 0.94rem;
      font-weight: 700;
      color: var(--dark);
    }
    .review-meta span {
      font-size: 0.78rem;
      color: var(--gray-mid);
    }
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-question {
      padding: 18px 22px;
      font-size: 1.02rem;
      font-weight: 700;
      color: var(--dark);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }
    .faq-question:hover {
      background: #f8fafc;
    }
    .faq-icon-arrow {
      width: 18px;
      height: 18px;
      transition: transform 0.25s ease;
      color: var(--primary);
      font-weight: bold;
    }
    .faq-answer {
      display: none;
      padding: 0 22px 18px;
      font-size: 0.92rem;
      color: var(--gray-deep);
      line-height: 1.65;
      border-top: 1px solid #f1f5f9;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-icon-arrow {
      transform: rotate(180deg);
    }
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 24px;
    }
    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 22px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .article-tag {
      font-size: 0.76rem;
      background: var(--accent-soft);
      color: var(--accent);
      padding: 3px 8px;
      border-radius: 4px;
      align-self: flex-start;
      margin-bottom: 10px;
      font-weight: 700;
    }
    .article-card h4 {
      font-size: 1.02rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
      line-height: 1.45;
    }
    .article-card p {
      font-size: 0.86rem;
      color: var(--gray-mid);
      margin-bottom: 14px;
      line-height: 1.6;
    }
    .article-link {
      font-size: 0.86rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .article-link:hover {
      color: var(--primary-hover);
      text-decoration: underline;
    }
    .article-custom-area {
      background: #f1f5f9;
      border-radius: var(--radius);
      padding: 16px 20px;
      font-size: 0.9rem;
      color: var(--gray-deep);
      margin-top: 14px;
    }
    .banners-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 24px;
    }
    .banner-box {
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #ffffff;
      box-shadow: 0 4px 10px rgba(0,0,0,0.03);
    }
    .banner-box img {
      width: 100%;
      height: 160px;
      object-fit: cover;
    }
    .agent-box {
      background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
      border: 2px dashed #fb923c;
      border-radius: var(--radius-lg);
      padding: 34px;
      text-align: center;
      margin-top: 20px;
    }
    .agent-box h3 {
      font-size: 1.5rem;
      font-weight: 800;
      color: #9a3412;
      margin-bottom: 10px;
    }
    .agent-box p {
      color: #7c2d12;
      font-size: 0.98rem;
      max-width: 780px;
      margin: 0 auto 20px;
      line-height: 1.65;
    }
    .footer-section {
      background: #0d1522;
      color: #94a3b8;
      padding: 56px 0 24px;
      border-top: 1px solid #1e293b;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 32px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-col p {
      font-size: 0.88rem;
      line-height: 1.7;
      margin-bottom: 14px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 9px;
    }
    .footer-links li a {
      font-size: 0.88rem;
      color: #94a3b8;
    }
    .footer-links li a:hover {
      color: #ffffff;
    }
    .footer-qr-wrap {
      display: flex;
      align-items: center;
      gap: 14px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 12px;
      border-radius: 10px;
    }
    .footer-qr-wrap img {
      width: 76px;
      height: 76px;
      border-radius: 6px;
      background: #ffffff;
    }
    .footer-qr-desc {
      font-size: 0.82rem;
      color: #cbd5e1;
      line-height: 1.45;
    }
    .friend-links-box {
      border-top: 1px solid #1e293b;
      padding-top: 22px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
      font-size: 0.84rem;
    }
    .friend-links-box span {
      color: #ffffff;
      font-weight: 700;
    }
    .friend-links-box a {
      color: #64748b;
      background: rgba(255, 255, 255, 0.03);
      padding: 4px 10px;
      border-radius: 4px;
    }
    .friend-links-box a:hover {
      color: #38bdf8;
      background: rgba(255, 255, 255, 0.08);
    }
    .copyright-area {
      text-align: center;
      font-size: 0.82rem;
      color: #64748b;
      border-top: 1px solid #1e293b;
      padding-top: 20px;
    }
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 28px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
      border: 1px solid var(--border-color);
      cursor: pointer;
      position: relative;
    }
    .floating-btn.kefu-btn {
      background: var(--accent);
      color: #ffffff;
      border-color: var(--accent);
    }
    .floating-qr-pop {
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 10px;
      box-shadow: 0 8px 24px rgba(0,0,0,0.2);
      display: none;
      width: 140px;
      text-align: center;
      border: 1px solid var(--border-color);
    }
    .floating-qr-pop img {
      width: 100%;
      height: auto;
      margin-bottom: 6px;
    }
    .floating-qr-pop span {
      font-size: 0.75rem;
      color: var(--dark);
      font-weight: 600;
    }
    .floating-btn.kefu-btn:hover .floating-qr-pop {
      display: block;
    }
    @media (max-width: 992px) {
      .hero-metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .platform-intro-grid { grid-template-columns: 1fr; }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .steps-container { grid-template-columns: repeat(2, 1fr); }
      .form-panel-wrap { grid-template-columns: 1fr; }
      .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
      .articles-grid { grid-template-columns: repeat(2, 1fr); }
      .banners-strip { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .mobile-menu-btn { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .grid-3, .grid-4, .testimonials-grid, .articles-grid, .banners-strip, .media-card-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .compare-highlight-card {
        flex-direction: column;
        align-items: flex-start;
      }
    }