:root {
      --primary: #10b981;
      --primary-dark: #059669;
      --primary-light: #ecfdf5;
      --mint: #34d399;
      --mint-glow: rgba(52, 211, 153, 0.18);
      --bg-page: #f8faf9;
      --bg-card: #ffffff;
      --text-main: #1f2937;
      --text-muted: #4b5563;
      --text-light: #6b7280;
      --border-color: #e5e7eb;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 6px 16px -2px rgba(16, 185, 129, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
      --shadow-lg: 0 12px 28px -4px rgba(16, 185, 129, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --radius: 12px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    ul, ol {
      list-style: none;
    }
    .main-container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(229, 231, 235, 0.8);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-area .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }
    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: #065f46;
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-links a {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
      padding: 8px 12px;
      border-radius: 6px;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-dark);
      background-color: var(--primary-light);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 18px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      text-align: center;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 10px rgba(16, 185, 129, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      box-shadow: 0 6px 14px rgba(16, 185, 129, 0.35);
      transform: translateY(-1px);
      color: #ffffff;
    }
    .btn-outline {
      background-color: transparent;
      border-color: var(--primary);
      color: var(--primary-dark);
    }
    .btn-outline:hover {
      background-color: var(--primary-light);
    }
    .btn-sm {
      padding: 6px 12px;
      font-size: 13px;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 22px;
      cursor: pointer;
      color: var(--text-main);
    }
    .hero-section {
      padding: 60px 0 50px;
      background: radial-gradient(circle at 10% 20%, rgba(209, 250, 229, 0.6) 0%, rgba(248, 250, 249, 1) 70%);
      border-bottom: 1px solid #edf2f0;
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 36px;
      align-items: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      background: #ecfdf5;
      color: var(--primary-dark);
      border: 1px solid #a7f3d0;
      border-radius: 9999px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .hero-title {
      font-size: 2.35rem;
      line-height: 1.25;
      font-weight: 800;
      color: #064e3b;
      margin-bottom: 16px;
      letter-spacing: -0.8px;
    }
    .hero-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 28px;
    }
    .hero-btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 30px;
    }
    .hero-metrics {
      display: flex;
      gap: 24px;
      border-top: 1px dashed #d1fae5;
      padding-top: 20px;
    }
    .metric-item .val {
      font-size: 1.45rem;
      font-weight: 700;
      color: #047857;
    }
    .metric-item .lbl {
      font-size: 13px;
      color: var(--text-light);
    }
    .hero-card-panel {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid #d1fae5;
      box-shadow: var(--shadow-lg);
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .hero-panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid #f0fdf4;
      padding-bottom: 12px;
    }
    .hero-panel-title {
      font-size: 15px;
      font-weight: 700;
      color: #065f46;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
      70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
      100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }
    .platform-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 7px;
    }
    .platform-tag {
      background: #f0fdf4;
      border: 1px solid #d1fae5;
      color: #047857;
      font-size: 12px;
      padding: 4px 9px;
      border-radius: 6px;
      font-weight: 500;
    }
    .hero-feature-item {
      background: #fcfdfd;
      border: 1px solid #f3f4f6;
      padding: 12px;
      border-radius: 8px;
      display: flex;
      gap: 12px;
      align-items: flex-start;
    }
    .feature-icon-box {
      background: #d1fae5;
      color: #065f46;
      width: 32px;
      height: 32px;
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 13px;
      flex-shrink: 0;
    }
    .section-block {
      padding: 60px 0;
      border-bottom: 1px solid #edf2f0;
    }
    .section-head {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 36px;
    }
    .section-tag {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary-dark);
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 8px;
      display: inline-block;
    }
    .section-head h2 {
      font-size: 1.85rem;
      font-weight: 700;
      color: #111827;
      margin-bottom: 10px;
      letter-spacing: -0.4px;
    }
    .section-head p {
      font-size: 15px;
      color: var(--text-muted);
    }
    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .card-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }
    .card-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: #a7f3d0;
    }
    .service-icon {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 18px;
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #111827;
    }
    .service-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 12px;
      flex-grow: 1;
    }
    .service-badge {
      align-self: flex-start;
      font-size: 12px;
      color: var(--primary-dark);
      background: #f0fdf4;
      padding: 3px 8px;
      border-radius: 4px;
      border: 1px solid #d1fae5;
    }
    .platform-overview-box {
      background: #ffffff;
      border: 1px solid #d1fae5;
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 30px;
    }
    .step-list {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }
    .step-item {
      background: #ffffff;
      padding: 20px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      position: relative;
    }
    .step-num {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 13px;
      margin-bottom: 12px;
    }
    .step-item h4 {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 6px;
      color: #111827;
    }
    .step-item p {
      font-size: 13px;
      color: var(--text-muted);
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .compare-table th, .compare-table td {
      padding: 14px 18px;
      font-size: 14px;
      border-bottom: 1px solid #f3f4f6;
    }
    .compare-table th {
      background: #f8faf9;
      font-weight: 700;
      color: #374151;
    }
    .compare-table tr:hover td {
      background: #f9fdfb;
    }
    .highlight-col {
      background: #f0fdf4;
      font-weight: 600;
      color: #065f46;
    }
    .star-score {
      color: #f59e0b;
      font-size: 16px;
      font-weight: 700;
    }
    .case-card {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease;
    }
    .case-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #e5e7eb;
      overflow: hidden;
    }
    .case-img-wrap.square {
      aspect-ratio: 1 / 1;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .case-info {
      padding: 18px;
    }
    .case-info h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
      color: #111827;
    }
    .case-info p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .avatar-char {
      width: 40px;
      height: 40px;
      background: #d1fae5;
      color: #065f46;
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
    }
    .review-meta h4 {
      font-size: 14px;
      font-weight: 700;
      color: #111827;
    }
    .review-meta span {
      font-size: 12px;
      color: var(--text-light);
    }
    .review-text {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .faq-accordion {
      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-item.active {
      border-color: #a7f3d0;
    }
    .faq-question {
      padding: 16px 20px;
      font-size: 15px;
      font-weight: 600;
      color: #1f2937;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #ffffff;
    }
    .faq-question:hover {
      background: #f9fdfb;
    }
    .faq-toggle {
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-toggle {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fafcfb;
      padding: 0 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .faq-item.active .faq-answer {
      padding: 14px 20px 18px;
      max-height: 300px;
      border-top: 1px solid #f3f4f6;
    }
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .form-grid.full {
      grid-template-columns: 1fr;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
      margin-bottom: 16px;
    }
    .form-group label {
      font-size: 13.5px;
      font-weight: 600;
      color: #374151;
    }
    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
      background: #fcfdfd;
      color: var(--text-main);
    }
    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
    }
    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 14px 18px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: all 0.2s;
    }
    .article-item:hover {
      border-color: var(--primary);
      background: #f9fdfb;
      transform: translateX(4px);
    }
    .article-item a {
      font-size: 14.5px;
      font-weight: 600;
      color: #1f2937;
    }
    .article-date {
      font-size: 13px;
      color: var(--text-light);
    }
    .banner-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-bottom: 24px;
    }
    .banner-row .ai-page-image {
      width: 100%;
      height: 160px;
      object-fit: cover;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }
    .contact-card-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .contact-info-panel {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .qr-box {
      display: flex;
      align-items: center;
      gap: 18px;
      background: #f8faf9;
      padding: 16px;
      border-radius: 8px;
      border: 1px solid #e5e7eb;
    }
    .qr-box img {
      width: 88px;
      height: 88px;
      border-radius: 6px;
      object-fit: cover;
      border: 1px solid #d1fae5;
    }
    .qr-desc h5 {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 4px;
      color: #111827;
    }
    .qr-desc p {
      font-size: 13px;
      color: var(--text-muted);
    }
    footer.site-footer {
      background: #111827;
      color: #d1d5db;
      padding: 48px 0 24px;
      margin-top: 40px;
      border-top: 1px solid #1f2937;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 32px;
      padding-bottom: 36px;
      border-bottom: 1px solid #374151;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 14px;
      letter-spacing: 0.2px;
    }
    .footer-col p {
      font-size: 13.5px;
      line-height: 1.6;
      color: #9ca3af;
      margin-bottom: 12px;
    }
    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links a {
      color: #9ca3af;
      font-size: 13.5px;
    }
    .footer-links a:hover {
      color: var(--mint);
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .friend-links a {
      display: inline-block;
      font-size: 13px;
      color: #9ca3af;
      background: #1f2937;
      padding: 4px 10px;
      border-radius: 4px;
    }
    .friend-links a:hover {
      color: #ffffff;
      background: #374151;
    }
    .footer-bottom {
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
      color: #6b7280;
    }
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 1000;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .kefu-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
      cursor: pointer;
      border: none;
      transition: transform 0.2s ease;
    }
    .kefu-btn:hover {
      transform: scale(1.08);
      background: var(--primary-dark);
    }
    .kefu-dialog {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      width: 220px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-lg);
      padding: 16px;
      text-align: center;
    }
    .kefu-dialog.active {
      display: block;
    }
    .kefu-dialog img {
      width: 130px;
      height: 130px;
      margin: 0 auto 8px;
      display: block;
      border: 1px solid #d1fae5;
      border-radius: 6px;
    }
    .kefu-dialog span {
      font-size: 12px;
      color: var(--text-muted);
    }
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .card-grid-3, .card-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-list {
        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;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px;
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .header-actions .btn {
        display: none;
      }
      .card-grid-2, .card-grid-3, .card-grid-4 {
        grid-template-columns: 1fr;
      }
      .step-list {
        grid-template-columns: 1fr;
      }
      .contact-card-grid {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .banner-row {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.85rem;
      }
    }