:root {
      --primary-yellow: #facc15;
      --primary-yellow-hover: #eab308;
      --accent-yellow-light: #fef08a;
      --dark-text: #1e293b;
      --body-text: #334155;
      --muted-text: #64748b;
      --bg-light: #fefce8;
      --bg-white: #ffffff;
      --bg-subtle: #fafaf9;
      --border-color: #fde047;
      --border-subtle: #e2e8f0;
      --card-shadow: 0 10px 25px -5px rgba(234, 179, 8, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-subtle);
      background-image: radial-gradient(#fde047 0.75px, transparent 0.75px), radial-gradient(#fde047 0.75px, var(--bg-subtle) 0.75px);
      background-size: 30px 30px;
      background-position: 0 0, 15px 15px;
      color: var(--body-text);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    ul {
      list-style: none;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--primary-yellow);
      box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

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

    .brand-box .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      font-size: 14px;
      font-weight: 500;
      color: var(--dark-text);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }

    .nav-links a:hover {
      background-color: var(--bg-light);
      color: #854d0e;
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 9999px;
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
      border: 1px solid transparent;
    }

    .btn:active {
      transform: scale(0.97);
    }

    .btn-primary {
      background-color: var(--primary-yellow);
      color: #713f12;
      box-shadow: 0 4px 14px rgba(250, 204, 21, 0.45);
    }

    .btn-primary:hover {
      background-color: var(--primary-yellow-hover);
      box-shadow: 0 6px 18px rgba(234, 179, 8, 0.55);
    }

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

    .btn-outline:hover {
      border-color: var(--primary-yellow);
      background-color: var(--bg-light);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .menu-toggle svg {
      width: 28px;
      height: 28px;
      stroke: var(--dark-text);
    }

    .section {
      padding: 70px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: var(--accent-yellow-light);
      color: #854d0e;
      font-size: 13px;
      font-weight: 700;
      border-radius: 9999px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--dark-text);
      line-height: 1.3;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--muted-text);
      max-width: 680px;
      margin: 0 auto;
    }

    .hero-section {
      padding: 90px 0 60px 0;
      background: linear-gradient(180deg, #fef08a 0%, #fefce8 60%, var(--bg-subtle) 100%);
      border-bottom: 1px solid rgba(250, 204, 21, 0.4);
      position: relative;
    }

    .hero-wrapper {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 18px;
      border-radius: 9999px;
      font-size: 14px;
      font-weight: 600;
      color: #854d0e;
      border: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(234, 179, 8, 0.15);
      margin-bottom: 24px;
    }

    .hero-badge span {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #16a34a;
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      color: #0f172a;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title mark {
      background: transparent;
      color: #ca8a04;
      position: relative;
    }

    .hero-title mark::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 2px;
      width: 100%;
      height: 8px;
      background-color: var(--primary-yellow);
      z-index: -1;
      border-radius: 4px;
    }

    .hero-lead {
      font-size: 18px;
      color: #475569;
      margin-bottom: 36px;
      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: 17px;
      background: #eab308;
      color: #422006;
      border-radius: 9999px;
      font-weight: 700;
      box-shadow: 0 8px 24px rgba(234, 179, 8, 0.4);
    }

    .btn-hero-primary:hover {
      background: #ca8a04;
      color: #ffffff;
      transform: translateY(-2px);
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .metric-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--card-shadow);
    }

    .metric-num {
      font-size: 32px;
      font-weight: 800;
      color: #854d0e;
      line-height: 1;
      margin-bottom: 6px;
    }

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

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

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

    .card-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: #ffffff;
      border: 1px solid #f1f5f9;
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      border-color: var(--primary-yellow);
      box-shadow: 0 16px 30px -6px rgba(234, 179, 8, 0.2);
    }

    .card-icon-wrap {
      width: 52px;
      height: 52px;
      background: var(--accent-yellow-light);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: #854d0e;
      font-weight: 700;
      font-size: 20px;
    }

    .card-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 12px;
    }

    .card-desc {
      font-size: 14px;
      color: var(--muted-text);
      line-height: 1.65;
      margin-bottom: 18px;
    }

    .badge-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: auto;
    }

    .sub-badge {
      font-size: 12px;
      background: #f8fafc;
      color: #475569;
      padding: 3px 10px;
      border-radius: 6px;
      border: 1px solid #e2e8f0;
    }

    .chip-wall {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .chip-item {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      padding: 8px 16px;
      border-radius: 9999px;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      display: flex;
      align-items: center;
      gap: 6px;
      box-shadow: 0 2px 4px rgba(0,0,0,0.02);
    }

    .chip-item::before {
      content: '●';
      color: #eab308;
      font-size: 10px;
    }

    .media-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid #f1f5f9;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }

    .media-img-holder {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .media-img-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .media-square-holder {
      aspect-ratio: 1 / 1;
    }

    .media-content {
      padding: 22px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .process-step {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      padding: 24px 20px;
      border-radius: var(--radius-md);
      position: relative;
    }

    .step-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 16px;
    }

    .step-index {
      font-size: 26px;
      font-weight: 900;
      color: var(--primary-yellow-hover);
      line-height: 1;
    }

    .step-pill {
      font-size: 12px;
      font-weight: 600;
      background: var(--bg-light);
      color: #854d0e;
      padding: 2px 8px;
      border-radius: 4px;
    }

    .table-container {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid #f1f5f9;
      box-shadow: var(--card-shadow);
      overflow-x: auto;
      padding: 8px;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 640px;
    }

    th, td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
      font-size: 14px;
    }

    th {
      background-color: #fefce8;
      color: #854d0e;
      font-weight: 700;
    }

    tr:last-child td {
      border-bottom: none;
    }

    .rating-badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      background: #ca8a04;
      color: #fff;
      padding: 4px 10px;
      border-radius: 9999px;
      font-weight: 700;
      font-size: 13px;
    }

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

    .review-card {
      background: #ffffff;
      border: 1px solid #f1f5f9;
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--accent-yellow-light);
      color: #854d0e;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }

    .reviewer-role {
      font-size: 13px;
      color: var(--muted-text);
    }

    .reviewer-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--dark-text);
    }

    .review-text {
      font-size: 14px;
      color: #475569;
      line-height: 1.6;
    }

    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.2s;
    }

    .faq-item:hover {
      border-color: var(--primary-yellow);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 700;
      color: var(--dark-text);
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      user-select: none;
    }

    .faq-question::after {
      content: '+';
      font-size: 20px;
      color: #ca8a04;
      font-weight: 600;
      transition: transform 0.2s;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s ease-out;
      background-color: #fefce8;
      color: #475569;
      font-size: 14px;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      padding: 18px 22px;
      max-height: 300px;
    }

    .form-wrapper {
      max-width: 640px;
      margin: 0 auto;
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-color);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #cbd5e1;
      border-radius: var(--radius-sm);
      font-size: 14px;
      background: #fff;
      color: var(--dark-text);
      outline: none;
      transition: border-color 0.2s, box-shadow 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary-yellow-hover);
      box-shadow: 0 0 0 3px rgba(250, 204, 21, 0.25);
    }

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

    .site-footer {
      background: #1e293b;
      color: #94a3b8;
      padding: 60px 0 24px 0;
      border-top: 4px solid var(--primary-yellow);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-title {
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a {
      color: #cbd5e1;
      font-size: 14px;
    }

    .footer-links a:hover {
      color: var(--primary-yellow);
    }

    .qrcode-box {
      background: #ffffff;
      padding: 8px;
      border-radius: 8px;
      display: inline-block;
      margin-bottom: 10px;
    }

    .qrcode-box img {
      width: 100px;
      height: 100px;
      display: block;
    }

    .footer-bottom {
      border-top: 1px solid #334155;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

    .footer-friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-bottom: 16px;
    }

    .footer-friend-links a {
      color: #94a3b8;
      font-size: 13px;
    }

    .footer-friend-links a:hover {
      color: var(--primary-yellow);
    }

    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 1000;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .widget-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 2px solid var(--primary-yellow);
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: #854d0e;
      transition: transform 0.2s, background-color 0.2s;
    }

    .widget-btn:hover {
      background: var(--bg-light);
      transform: scale(1.05);
    }

    .widget-btn svg {
      width: 22px;
      height: 22px;
      fill: currentColor;
    }

    @media (max-width: 992px) {
      .card-grid, .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .card-grid-4, .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-title {
        font-size: 32px;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 2px solid var(--primary-yellow);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 0;
      }
      .menu-toggle {
        display: block;
      }
      .card-grid, .card-grid-4, .card-grid-2, .review-grid, .process-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 26px;
      }
      .hero-title {
        font-size: 28px;
      }
      .form-wrapper {
        padding: 24px;
      }
    }