:root {
      --primary-color: #059669;
      --primary-light: #10b981;
      --primary-bright: #00d26a;
      --primary-soft: #ecfdf5;
      --primary-hover: #047857;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --bg-page: #f8fafc;
      --bg-white: #ffffff;
      --border-color: #e2e8f0;
      --border-light: #d1fae5;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 10px 15px -3px rgba(16, 185, 129, 0.12), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --transition: all 0.25s ease-in-out;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    ul, ol { list-style: none; }
    button, input, select, textarea { font-family: inherit; }
    .site-container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .section-wrap {
      padding: 72px 0;
      position: relative;
    }
    .section-alt {
      background: linear-gradient(180deg, #ffffff 0%, #f0fdf4 100%);
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px auto;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary-color);
      background-color: var(--primary-soft);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-full);
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-inner {
      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;
      object-fit: contain;
      display: block;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-color);
      letter-spacing: -0.5px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-links li a {
      padding: 8px 12px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover {
      color: var(--primary-color);
      background: var(--primary-soft);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      line-height: 1.2;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary-bright) 0%, var(--primary-color) 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-hover) 100%);
      box-shadow: 0 6px 18px rgba(16, 185, 129, 0.45);
      transform: translateY(-1px);
    }
    .btn-secondary {
      background-color: #ffffff;
      color: var(--primary-color);
      border: 1px solid var(--primary-light);
    }
    .btn-secondary:hover {
      background-color: var(--primary-soft);
      border-color: var(--primary-color);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }
    .hero-section {
      background: radial-gradient(circle at 50% 10%, rgba(16, 185, 129, 0.12) 0%, rgba(248, 250, 252, 1) 70%);
      padding: 80px 0 60px 0;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: rgba(16, 185, 129, 0.1);
      border: 1px solid rgba(16, 185, 129, 0.25);
      border-radius: var(--radius-full);
      color: var(--primary-hover);
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-highlight {
      background: linear-gradient(135deg, var(--primary-color), #047857);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-hero-primary {
      padding: 14px 34px;
      font-size: 1.05rem;
    }
    .hero-features-list {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .hero-feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      text-align: left;
      transition: var(--transition);
    }
    .hero-feature-card:hover {
      border-color: var(--primary-light);
      box-shadow: var(--shadow-lg);
      transform: translateY(-2px);
    }
    .hero-feature-card h4 {
      font-size: 1.05rem;
      color: var(--primary-color);
      margin-bottom: 8px;
    }
    .hero-feature-card p {
      font-size: 0.88rem;
      color: var(--text-sub);
      line-height: 1.5;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .platform-panel {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      margin-bottom: 40px;
    }
    .platform-intro-text {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .models-cloud-wrap {
      background: var(--primary-soft);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-light);
    }
    .models-cloud-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--primary-hover);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .tag-item {
      padding: 6px 14px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
    }
    .tag-item:hover {
      border-color: var(--primary-light);
      color: var(--primary-color);
    }
    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .service-card:hover {
      border-color: var(--primary-light);
      box-shadow: var(--shadow-lg);
      transform: translateY(-3px);
    }
    .service-card-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .service-icon {
      width: 40px;
      height: 40px;
      border-radius: var(--radius-md);
      background: var(--primary-soft);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .service-card h3 {
      font-size: 1.15rem;
      color: var(--text-main);
    }
    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }
    .step-list {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .step-number {
      width: 36px;
      height: 36px;
      background: var(--primary-color);
      color: #ffffff;
      font-weight: 700;
      border-radius: var(--radius-full);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      font-size: 1.1rem;
    }
    .step-card h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .step-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .rating-banner {
      background: linear-gradient(135deg, #065f46 0%, #047857 100%);
      border-radius: var(--radius-lg);
      padding: 36px 40px;
      color: #ffffff;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-lg);
    }
    .rating-score {
      font-size: 3.6rem;
      font-weight: 800;
      line-height: 1;
      color: #a7f3d0;
    }
    .rating-stars {
      color: #facc15;
      font-size: 1.6rem;
      margin-bottom: 6px;
    }
    .rating-desc {
      font-size: 1rem;
      color: #e2e8f0;
      max-width: 600px;
    }
    .table-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .custom-table th {
      background-color: #f8fafc;
      font-weight: 600;
      color: var(--text-main);
    }
    .custom-table tr:last-child td {
      border-bottom: none;
    }
    .custom-table .highlight-col {
      background-color: #f0fdf4;
      font-weight: 600;
      color: var(--primary-color);
    }
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .media-card-body {
      padding: 20px;
    }
    .media-card-body h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .media-card-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .article-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 14px 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      transition: var(--transition);
    }
    .article-item:hover {
      border-color: var(--primary-light);
      transform: translateX(4px);
    }
    .article-item-title {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .article-item-link {
      font-size: 0.85rem;
      color: var(--primary-color);
      font-weight: 600;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-content {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }
    .review-avatar {
      width: 42px;
      height: 42px;
      background: var(--primary-soft);
      color: var(--primary-color);
      font-weight: 700;
      border-radius: var(--radius-full);
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .review-info h4 {
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .review-info span {
      font-size: 0.82rem;
      color: var(--text-sub);
    }
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      transition: var(--transition);
    }
    .faq-question:hover {
      background: #f8fafc;
      color: var(--primary-color);
    }
    .faq-question::after {
      content: "+";
      font-size: 1.4rem;
      color: var(--primary-color);
      font-weight: 400;
      line-height: 1;
    }
    .faq-item.active .faq-question::after {
      content: "−";
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background-color: #f8fafc;
      outline: none;
      transition: var(--transition);
    }
    .form-control:focus {
      background-color: #ffffff;
      border-color: var(--primary-light);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }
    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .contact-info-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      padding: 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
    }
    .contact-qr-wrap {
      text-align: center;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      margin-top: 16px;
    }
    .contact-qr-wrap img {
      width: 130px;
      height: 130px;
      object-fit: contain;
      display: block;
      margin: 0 auto 10px auto;
    }
    .agency-box {
      background: linear-gradient(135deg, #f0fdf4 0%, #d1fae5 100%);
      border: 1px solid #a7f3d0;
      border-radius: var(--radius-lg);
      padding: 48px 40px;
      text-align: center;
    }
    .agency-box h3 {
      font-size: 1.8rem;
      color: #065f46;
      margin-bottom: 14px;
    }
    .agency-box p {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto 28px auto;
      line-height: 1.6;
    }
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 56px 0 28px 0;
      border-top: 1px solid #1e293b;
    }
    .footer-content {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a {
      color: #94a3b8;
      font-size: 0.9rem;
    }
    .footer-col ul li a:hover {
      color: var(--primary-light);
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.88rem;
    }
    .friendly-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }
    .friendly-links a {
      color: #94a3b8;
      font-size: 0.85rem;
    }
    .friendly-links a:hover {
      color: var(--primary-bright);
    }
    .floating-bar {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-full);
      background: var(--primary-color);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      box-shadow: var(--shadow-lg);
      cursor: pointer;
      border: none;
      transition: var(--transition);
    }
    .floating-btn:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
    }
    .banner-strip {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 36px;
    }
    .banner-strip-item {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
    }
    .banner-strip-item img {
      width: 100%;
      height: auto;
      display: block;
    }
    @media (max-width: 992px) {
      .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .step-list { grid-template-columns: repeat(2, 1fr); }
      .hero-features-list { grid-template-columns: repeat(2, 1fr); }
      .banner-strip { grid-template-columns: repeat(1, 1fr); }
      .footer-content { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .mobile-menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active { display: flex; }
      .nav-actions { display: none; }
      .hero-title { font-size: 2rem; }
      .hero-features-list, .grid-2, .grid-3, .grid-4, .step-list { grid-template-columns: 1fr; }
      .footer-content { grid-template-columns: 1fr; }
      .rating-banner { flex-direction: column; text-align: center; gap: 20px; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }