:root {
      --primary: #4338ca;
      --primary-light: #6366f1;
      --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #ec4899 100%);
      --rainbow-accent: linear-gradient(90deg, #ef4444, #f59e0b, #10b981, #06b6d4, #6366f1, #d946ef);
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 20px 25px -5px rgba(99, 102, 241, 0.15), 0 8px 10px -6px rgba(99, 102, 241, 0.1);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.03) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(236, 72, 153, 0.03) 0%, transparent 40%),
                  var(--bg-page);
      min-height: 100vh;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    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);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-logo {
      height: 40px;
      display: flex;
      align-items: center;
    }

    .brand-logo img.ai-page-logo {
      max-height: 38px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 20px;
      font-weight: 700;
      color: #1e1b4b;
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      padding: 8px 12px;
      border-radius: 6px;
      transition: color 0.2s, background 0.2s;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: #f1f5f9;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 8px;
      text-decoration: none;
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      line-height: 1.2;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
    }

    .btn-primary:hover {
      opacity: 0.95;
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(79, 70, 229, 0.35);
      color: #ffffff;
    }

    .btn-outline {
      border-color: #cbd5e1;
      background: #ffffff;
      color: var(--text-main);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #f8fafc;
    }

    .btn-rainbow {
      position: relative;
      background: #ffffff;
      color: #1e1b4b;
      border: none;
      z-index: 1;
      padding: 10px 22px;
    }

    .btn-rainbow::before {
      content: "";
      position: absolute;
      inset: -2px;
      border-radius: 10px;
      background: var(--rainbow-accent);
      z-index: -1;
      transition: opacity 0.25s ease;
    }

    .btn-rainbow:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(99, 102, 241, 0.25);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 6px 10px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 16px;
      color: var(--text-main);
    }

    section {
      padding: 70px 0;
      position: relative;
    }

    .section-rainbow-strip {
      height: 4px;
      background: var(--rainbow-accent);
      width: 100%;
    }

    .section-head {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 48px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      background: #ede9fe;
      color: #6d28d9;
      font-size: 13px;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 12px;
      border: 1px solid #ddd6fe;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #0f172a;
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .hero {
      padding: 85px 0 65px 0;
      background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-inner {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero h1 {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 900;
      color: #0f172a;
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }

    .hero h1 span {
      background: var(--rainbow-accent);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 18px;
      color: #334155;
      margin-bottom: 34px;
      line-height: 1.8;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-btn-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .hero-features-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      text-align: left;
    }

    .h-feature-item {
      display: flex;
      flex-direction: column;
      gap: 6px;
      border-right: 1px solid #f1f5f9;
      padding-right: 12px;
    }

    .h-feature-item:last-child {
      border-right: none;
    }

    .h-feature-title {
      font-weight: 700;
      color: #1e293b;
      font-size: 15px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .h-feature-title::before {
      content: "";
      width: 8px;
      height: 8px;
      background: #3b82f6;
      border-radius: 50%;
      display: inline-block;
    }

    .h-feature-item:nth-child(2) .h-feature-title::before { background: #10b981; }
    .h-feature-item:nth-child(3) .h-feature-title::before { background: #f59e0b; }
    .h-feature-item:nth-child(4) .h-feature-title::before { background: #ec4899; }

    .h-feature-desc {
      font-size: 13px;
      color: #64748b;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }

    .stat-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .stat-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }

    .stat-number {
      font-size: 32px;
      font-weight: 800;
      color: #1e1b4b;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 24px;
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #cbd5e1;
    }

    .card-tag {
      font-size: 12px;
      font-weight: 700;
      color: #4f46e5;
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .card-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .model-badge-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 24px;
      justify-content: center;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      box-shadow: 0 1px 2px rgba(0,0,0,0.03);
      transition: all 0.2s;
    }

    .model-chip:hover {
      background: #eef2ff;
      border-color: #818cf8;
      color: #3730a3;
      transform: scale(1.03);
    }

    .process-flow {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .process-step {
      background: #ffffff;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .step-badge {
      width: 36px;
      height: 36px;
      background: #f1f5f9;
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 14px;
      margin-bottom: 12px;
      border: 2px solid var(--border-color);
    }

    .process-step:hover .step-badge {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

    .step-title {
      font-size: 15px;
      font-weight: 700;
      color: #1e293b;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .rating-banner {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      padding: 30px;
      border-radius: var(--radius-lg);
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .rating-score-box {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-giant {
      font-size: 48px;
      font-weight: 900;
      color: #38bdf8;
      line-height: 1;
    }

    .rating-stars {
      color: #fbbf24;
      font-size: 20px;
      letter-spacing: 2px;
    }

    .table-container {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
      min-width: 640px;
    }

    table.compare-table th,
    table.compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    table.compare-table th {
      background: #f8fafc;
      color: #334155;
      font-weight: 700;
    }

    table.compare-table tr:hover td {
      background: #fdfdff;
    }

    .highlight-col {
      background: #f5f3ff;
      font-weight: 600;
      color: #4338ca;
    }

    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 24px;
    }

    .gallery-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .gallery-thumb-box {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .gallery-thumb-box.square {
      aspect-ratio: 1 / 1;
    }

    .gallery-thumb-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }

    .gallery-item:hover .gallery-thumb-box img {
      transform: scale(1.04);
    }

    .gallery-info {
      padding: 16px;
    }

    .gallery-info h4 {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 6px;
      color: #1e293b;
    }

    .gallery-info p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: border-color 0.2s;
    }

    .faq-item:hover {
      border-color: #cbd5e1;
    }

    .faq-question {
      width: 100%;
      padding: 16px 20px;
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 15px;
      font-weight: 600;
      color: #1e293b;
      text-align: left;
      cursor: pointer;
    }

    .faq-question::after {
      content: "+";
      font-size: 18px;
      font-weight: 400;
      color: #64748b;
      margin-left: 10px;
      transition: transform 0.2s;
    }

    .faq-item.open .faq-question::after {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #f8fafc;
      font-size: 14px;
      color: #475569;
      line-height: 1.7;
      padding: 0 20px;
    }

    .faq-item.open .faq-answer {
      max-height: 400px;
      padding: 16px 20px;
      border-top: 1px solid var(--border-color);
    }

    .reviews-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-md);
      padding: 20px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: italic;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }

    .reviewer-avatar-placeholder {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #a5b4fc, #6366f1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 700;
      font-size: 14px;
    }

    .reviewer-name {
      font-size: 14px;
      font-weight: 700;
      color: #0f172a;
    }

    .reviewer-role {
      font-size: 12px;
      color: #64748b;
    }

    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: #334155;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      font-size: 14px;
      border: 1px solid #cbd5e1;
      border-radius: 6px;
      background: #ffffff;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .info-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }

    .info-label {
      font-weight: 600;
      font-size: 14px;
      color: #1e293b;
      min-width: 80px;
    }

    .info-val {
      font-size: 14px;
      color: var(--text-muted);
    }

    .qr-card {
      margin-top: 16px;
      background: #f8fafc;
      padding: 16px;
      border-radius: var(--radius-md);
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      border: 1px solid var(--border-color);
    }

    .qr-card img {
      max-width: 130px;
      height: auto;
      display: block;
      border-radius: 4px;
    }

    .qr-card-tip {
      font-size: 12px;
      color: #64748b;
      margin-top: 8px;
    }

    .article-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
    }

    .article-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 8px 0;
      border-bottom: 1px dashed var(--border-color);
    }

    .article-item:last-child {
      border-bottom: none;
    }

    .article-link {
      color: #334155;
      text-decoration: none;
      font-size: 14px;
      transition: color 0.2s;
    }

    .article-link:hover {
      color: var(--primary);
    }

    .article-tag {
      font-size: 12px;
      background: #e2e8f0;
      padding: 2px 8px;
      border-radius: 4px;
      color: #475569;
    }

    footer {
      background: #0f172a;
      color: #94a3b8;
      font-size: 14px;
      padding: 50px 0 30px 0;
      border-top: 4px solid var(--primary-light);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 32px;
      margin-bottom: 36px;
    }

    .footer-col h4 {
      color: #f8fafc;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 8px;
    }

    .footer-col ul li a {
      color: #94a3b8;
      text-decoration: none;
      transition: color 0.2s;
    }

    .footer-col ul li a:hover {
      color: #38bdf8;
    }

    .friendly-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 10px;
    }

    .friendly-links-wrap a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 13px;
      transition: color 0.2s;
    }

    .friendly-links-wrap a:hover {
      color: #ffffff;
      text-decoration: underline;
    }

    .footer-bottom {
      text-align: center;
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      font-size: 13px;
    }

    .float-dock {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .dock-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: #1e293b;
      text-decoration: none;
      font-size: 12px;
      font-weight: 700;
      transition: all 0.2s;
    }

    .dock-btn:hover {
      transform: scale(1.08);
      background: var(--primary);
      color: #ffffff;
    }

    @media (max-width: 992px) {
      .grid-3, .grid-4, .reviews-grid, .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-flow {
        grid-template-columns: repeat(3, 1fr);
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .hero h1 {
        font-size: 28px;
      }
      .hero-features-bar {
        grid-template-columns: 1fr;
      }
      .h-feature-item {
        border-right: none;
        border-bottom: 1px solid #f1f5f9;
        padding-bottom: 8px;
      }
      .h-feature-item:last-child {
        border-bottom: none;
      }
      .grid-3, .grid-4, .reviews-grid, .gallery-grid {
        grid-template-columns: 1fr;
      }
      .process-flow {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        grid-template-columns: 1fr;
      }
    }