:root {
      --primary: #f59e0b;
      --primary-hover: #d97706;
      --accent-yellow: #fbbf24;
      --light-yellow: #fffbeb;
      --bg-cream: #fefce8;
      --text-dark: #1f2937;
      --text-mid: #4b5563;
      --text-light: #6b7280;
      --border-color: #fde68a;
      --card-bg: #ffffff;
      --shadow-sm: 0 2px 4px rgba(245, 158, 11, 0.08);
      --shadow-md: 0 6px 16px rgba(217, 119, 6, 0.12);
      --shadow-lg: 0 12px 32px rgba(180, 83, 9, 0.16);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-w: 1200px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-dark);
      background-color: var(--bg-cream);
    }
    body {
      line-height: 1.6;
      overflow-x: hidden;
      background: radial-gradient(circle at top right, #fef3c7 0%, #fffbeb 40%, #fefce8 100%);
      min-height: 100vh;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: var(--container-w);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }
    .section-head {
      text-align: center;
      margin-bottom: 45px;
    }
    .section-tag {
      display: inline-block;
      background: #fde68a;
      color: #92400e;
      font-size: 13px;
      font-weight: 700;
      padding: 5px 14px;
      border-radius: 999px;
      margin-bottom: 12px;
      letter-spacing: 1px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #111827;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-mid);
      max-width: 720px;
      margin: 0 auto;
    }
    .header-main {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 75px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap .ai-page-logo {
      height: 42px;
      width: auto;
    }
    .brand-name {
      font-size: 20px;
      font-weight: 800;
      color: #b45309;
      letter-spacing: 0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 15px;
      font-weight: 600;
      color: #374151;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover {
      color: #b45309;
      background-color: var(--light-yellow);
    }
    .nav-btn-group {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-solid {
      background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
      color: #ffffff;
      font-size: 14px;
      font-weight: 700;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 12px rgba(245, 158, 11, 0.35);
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-solid:hover {
      background: linear-gradient(135deg, #fbbf24 0%, #b45309 100%);
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 2px solid #f59e0b;
      color: #b45309;
      font-size: 14px;
      font-weight: 700;
      padding: 8px 20px;
      border-radius: var(--radius-sm);
      background: transparent;
      cursor: pointer;
    }
    .btn-outline:hover {
      background: var(--light-yellow);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: #1f2937;
      cursor: pointer;
    }
    .hero-section {
      padding: 80px 0 60px;
      position: relative;
    }
    .hero-content {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      background: #fef3c7;
      border: 1px solid #fde68a;
      padding: 6px 18px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 700;
      color: #b45309;
      margin-bottom: 24px;
    }
    .hero-h1 {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      color: #111827;
      margin-bottom: 20px;
    }
    .hero-h1 span {
      background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: #d97706;
    }
    .hero-lead {
      font-size: 18px;
      color: #4b5563;
      margin-bottom: 35px;
      line-height: 1.7;
    }
    .hero-cta {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 18px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }
    .btn-hero-main {
      font-size: 18px;
      padding: 16px 36px;
      border-radius: var(--radius-md);
      background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
      color: #111827;
      font-weight: 800;
      box-shadow: 0 8px 24px rgba(245, 158, 11, 0.45);
      border: 2px solid #ffffff;
      animation: pulseGlow 2.5s infinite;
    }
    .btn-hero-main:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 28px rgba(217, 119, 6, 0.55);
    }
    .btn-hero-sub {
      font-size: 16px;
      padding: 15px 30px;
      border-radius: var(--radius-md);
      background: #ffffff;
      color: #92400e;
      border: 2px solid #fde68a;
      font-weight: 700;
    }
    .btn-hero-sub:hover {
      background: var(--light-yellow);
    }
    @keyframes pulseGlow {
      0%, 100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.5); }
      50% { box-shadow: 0 0 0 14px rgba(245, 158, 11, 0); }
    }
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .metric-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .metric-num {
      font-size: 32px;
      font-weight: 900;
      color: #b45309;
      line-height: 1;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 14px;
      color: #4b5563;
      font-weight: 600;
    }
    .models-marquee-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 2px dashed #fde68a;
      padding: 30px;
      margin-top: 40px;
      text-align: center;
    }
    .models-tagline {
      font-size: 15px;
      font-weight: 700;
      color: #92400e;
      margin-bottom: 18px;
    }
    .models-badge-list {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    .model-chip {
      background: #fefce8;
      border: 1px solid #fef08a;
      color: #78350f;
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 8px;
      transition: all 0.2s ease;
    }
    .model-chip:hover {
      background: #f59e0b;
      color: #ffffff;
      border-color: #f59e0b;
      transform: scale(1.05);
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: #f59e0b;
    }
    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 18px;
    }
    .card-title {
      font-size: 19px;
      font-weight: 700;
      color: #111827;
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 14px;
      color: #4b5563;
      line-height: 1.6;
      flex-grow: 1;
    }
    .card-footer-tip {
      margin-top: 16px;
      font-size: 12px;
      color: #b45309;
      font-weight: 600;
      background: #fffbeb;
      padding: 6px 10px;
      border-radius: 6px;
    }
    .showcase-banner-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-top: 30px;
    }
    .banner-img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 2px solid #fde68a;
      box-shadow: var(--shadow-sm);
      background: #fff;
    }
    .step-grid {
      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;
    }
    .step-badge {
      font-size: 12px;
      font-weight: 800;
      color: #d97706;
      background: #fef3c7;
      display: inline-block;
      padding: 4px 10px;
      border-radius: 4px;
      margin-bottom: 14px;
    }
    .step-name {
      font-size: 17px;
      font-weight: 700;
      color: #1f2937;
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 13px;
      color: #6b7280;
      line-height: 1.6;
    }
    .table-container {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .eval-table th {
      background: #fffbeb;
      padding: 16px 20px;
      font-size: 15px;
      font-weight: 700;
      color: #92400e;
      border-bottom: 2px solid var(--border-color);
    }
    .eval-table td {
      padding: 16px 20px;
      font-size: 14px;
      color: #374151;
      border-bottom: 1px solid #fef3c7;
    }
    .eval-highlight {
      background: #fffdf5;
      font-weight: 600;
      color: #b45309;
    }
    .score-badge-card {
      background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
      border: 2px solid #fde68a;
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      align-items: center;
      justify-content: space-around;
      margin-bottom: 28px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .score-item {
      text-align: center;
    }
    .score-label {
      font-size: 14px;
      font-weight: 700;
      color: #78350f;
    }
    .score-val {
      font-size: 32px;
      font-weight: 900;
      color: #d97706;
    }
    .price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .price-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 2px solid var(--border-color);
      padding: 32px 24px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .price-card.featured {
      border-color: #f59e0b;
      box-shadow: var(--shadow-md);
      transform: scale(1.02);
      background: #fffdfa;
    }
    .price-title {
      font-size: 20px;
      font-weight: 800;
      color: #111827;
      margin-bottom: 8px;
    }
    .price-amount {
      font-size: 34px;
      font-weight: 900;
      color: #b45309;
      margin: 16px 0;
    }
    .price-list {
      list-style: none;
      text-align: left;
      margin-bottom: 24px;
      flex-grow: 1;
    }
    .price-list li {
      font-size: 14px;
      color: #4b5563;
      padding: 8px 0;
      border-bottom: 1px dashed #fef3c7;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .review-stars {
      color: #f59e0b;
      margin-bottom: 12px;
      font-size: 16px;
    }
    .review-text {
      font-size: 14px;
      color: #4b5563;
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #fde68a;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #92400e;
    }
    .author-name {
      font-size: 15px;
      font-weight: 700;
      color: #1f2937;
    }
    .author-role {
      font-size: 12px;
      color: #6b7280;
    }
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      transition: all 0.2s ease;
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: #1f2937;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #fff;
    }
    .faq-question:hover {
      background: #fffdf5;
      color: #b45309;
    }
    .faq-icon {
      font-size: 18px;
      color: #f59e0b;
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #fffdf8;
      border-top: 1px solid #fef3c7;
    }
    .faq-answer-inner {
      padding: 16px 24px;
      font-size: 14px;
      color: #4b5563;
      line-height: 1.7;
    }
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .article-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 20px;
      transition: transform 0.2s ease;
    }
    .article-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-sm);
    }
    .article-meta {
      font-size: 12px;
      color: #b45309;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .article-title-link {
      font-size: 15px;
      font-weight: 700;
      color: #1f2937;
      display: block;
      margin-bottom: 8px;
      line-height: 1.4;
    }
    .article-title-link:hover {
      color: #b45309;
    }
    .contact-form-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 2px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-md);
      max-width: 820px;
      margin: 0 auto;
    }
    .form-group-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }
    .form-item {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-label {
      font-size: 14px;
      font-weight: 700;
      color: #374151;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #d1d5db;
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      background: #fff;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: #f59e0b;
      box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
    }
    .form-textarea {
      resize: vertical;
      min-height: 100px;
    }
    .footer-main {
      background: #ffffff;
      border-top: 2px solid var(--border-color);
      padding: 50px 0 30px;
      color: #374151;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 16px;
      font-weight: 800;
      color: #111827;
      margin-bottom: 16px;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links-list a {
      font-size: 14px;
      color: #4b5563;
    }
    .footer-links-list a:hover {
      color: #b45309;
    }
    .footer-qr-box {
      display: flex;
      gap: 16px;
      align-items: center;
    }
    .qr-img-wrap {
      width: 85px;
      height: 85px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      overflow: hidden;
      background: #fff;
    }
    .friend-links-box {
      border-top: 1px solid #fef3c7;
      padding-top: 20px;
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      font-size: 13px;
    }
    .friend-links-box a {
      color: #6b7280;
      background: #fffbeb;
      padding: 4px 10px;
      border-radius: 4px;
    }
    .friend-links-box a:hover {
      color: #b45309;
    }
    .footer-bottom {
      border-top: 1px solid #f3f4f6;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #9ca3af;
    }
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 40px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }
    .float-btn {
      width: 46px;
      height: 46px;
      background: #ffffff;
      border: 2px solid #f59e0b;
      color: #b45309;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      font-weight: 800;
      font-size: 13px;
      transition: all 0.2s ease;
    }
    .float-btn:hover {
      background: #f59e0b;
      color: #fff;
      transform: scale(1.08);
    }
    @media (max-width: 992px) {
      .grid-3, .price-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-bar, .step-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-h1 {
        font-size: 34px;
      }
      .nav-links {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
    }
    @media (max-width: 640px) {
      .grid-3, .price-grid, .reviews-grid, .metrics-bar, .step-grid, .showcase-banner-grid, .articles-grid {
        grid-template-columns: 1fr;
      }
      .form-group-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 26px;
      }
      .contact-form-card {
        padding: 24px 16px;
      }
      .nav-btn-group {
        display: none;
      }
    }