:root {
      --primary: #ffd000;
      --primary-dark: #e6bc00;
      --primary-light: #fff9d6;
      --accent: #111111;
      --bg-main: #fcfbf7;
      --bg-card: #ffffff;
      --text-main: #1e2022;
      --text-muted: #5f6368;
      --border-color: #ede9dc;
      --shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 16px 40px rgba(255, 208, 0, 0.25);
      --radius: 12px;
      --transition: all 0.25s ease-in-out;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      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;
    }
    ul {
      list-style: none;
    }
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(252, 251, 247, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-links a {
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      border-radius: 6px;
      transition: var(--transition);
    }
    .nav-links a:hover {
      background-color: var(--primary);
      color: var(--accent);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      padding: 10px 20px;
      border-radius: 8px;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .btn-primary {
      background-color: var(--primary);
      color: var(--accent);
      box-shadow: 0 4px 14px rgba(255, 208, 0, 0.4);
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }
    .btn-dark {
      background-color: var(--accent);
      color: #ffffff;
    }
    .btn-dark:hover {
      background-color: #2b2b2b;
      transform: translateY(-2px);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }
    .hero-section {
      padding: 80px 0 60px;
      background: radial-gradient(circle at 50% 20%, #fff6c2 0%, var(--bg-main) 70%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      background-color: #ffffff;
      border: 1px solid var(--primary);
      color: #946c00;
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 24px;
      box-shadow: 0 2px 8px rgba(255, 208, 0, 0.2);
    }
    .hero-title {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--accent);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: linear-gradient(180deg, transparent 65%, var(--primary) 65%);
      padding: 0 4px;
    }
    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-cta-group .btn {
      padding: 14px 32px;
      font-size: 16px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow);
    }
    .metric-item {
      text-align: center;
      border-right: 1px solid var(--border-color);
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-value {
      font-size: 32px;
      font-weight: 900;
      color: var(--accent);
      margin-bottom: 4px;
    }
    .metric-value em {
      font-style: normal;
      color: #c99300;
      font-size: 20px;
      margin-left: 2px;
    }
    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
    }
    .section-wrap {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-head {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-tag {
      font-size: 12px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: #946c00;
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 640px;
      margin: 0 auto;
    }
    .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;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: var(--transition);
      position: relative;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
    }
    .feature-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
      color: #8c6700;
      border: 1px solid rgba(255, 208, 0, 0.4);
    }
    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--accent);
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .model-tags-wrapper {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow);
    }
    .tags-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .model-pill {
      background: #f4f2ea;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .model-pill:hover {
      background: var(--primary);
      border-color: var(--primary-dark);
      transform: scale(1.05);
    }
    .compare-box {
      background: var(--bg-card);
      border: 2px solid var(--primary);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow);
    }
    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: var(--primary-light);
      padding: 16px 24px;
      border-radius: 8px;
      margin-bottom: 24px;
      border: 1px dashed #d6af00;
    }
    .score-val {
      font-size: 28px;
      font-weight: 900;
      color: #8c6700;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    .compare-table th {
      background: #fbfaf5;
      font-weight: 700;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .tag-highlight {
      background: var(--primary);
      color: var(--accent);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 700;
    }
    .step-item {
      position: relative;
      padding: 24px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
    }
    .step-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary);
      color: var(--accent);
      font-weight: 900;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }
    .media-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .media-card:hover {
      box-shadow: var(--shadow-hover);
    }
    .media-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #ede9dc;
    }
    .media-img-wrap.square {
      aspect-ratio: 1 / 1;
    }
    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-card:hover img {
      transform: scale(1.05);
    }
    .media-content {
      padding: 20px;
    }
    .media-content h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .media-content p {
      font-size: 13px;
      color: var(--text-muted);
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 14px;
      color: var(--text-main);
      margin-bottom: 16px;
      font-style: italic;
    }
    .reviewer {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 14px;
    }
    .reviewer-info h5 {
      font-size: 14px;
      font-weight: 700;
    }
    .reviewer-info span {
      font-size: 12px;
      color: var(--text-muted);
    }
    .faq-accordion {
      max-width: 880px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 15px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }
    .faq-question::after {
      content: '+';
      font-size: 20px;
      font-weight: 400;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .faq-item.active .faq-question::after {
      transform: rotate(45deg);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .form-wrapper {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      background: #faf9f5;
      outline: none;
      transition: var(--transition);
    }
    .form-control:focus {
      border-color: var(--primary-dark);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(255, 208, 0, 0.2);
    }
    .contact-side-info {
      display: flex;
      flex-direction: column;
      gap: 20px;
      justify-content: center;
    }
    .contact-card-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius);
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .qr-img-box {
      width: 90px;
      height: 90px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      overflow: hidden;
      flex-shrink: 0;
    }
    .qr-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .article-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 16px 20px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: var(--transition);
    }
    .article-item:hover {
      border-color: var(--primary-dark);
      background: #fffdf0;
      transform: translateX(4px);
    }
    .article-title {
      font-size: 14px;
      font-weight: 600;
    }
    .footer {
      background: #191b1d;
      color: #9ea3a9;
      padding: 60px 0 30px;
      font-size: 13px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col a {
      color: #9ea3a9;
      transition: var(--transition);
    }
    .footer-col a:hover {
      color: var(--primary);
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .friend-links a {
      color: #83888e;
      background: #25282c;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
    }
    .friend-links a:hover {
      background: var(--primary);
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid #2b2f35;
      padding-top: 24px;
      text-align: center;
      font-size: 12px;
      color: #6c727a;
    }
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--accent);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.2);
      cursor: pointer;
      font-size: 20px;
      transition: var(--transition);
      border: 1px solid var(--primary);
    }
    .float-btn:hover {
      transform: scale(1.1);
      background: var(--primary);
      color: var(--accent);
    }
    @media (max-width: 992px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 28px;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 12px;
      }
      .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 0;
        text-align: center;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-actions {
        display: none;
      }
    }