:root {
      --primary: #f5b300;
      --primary-hover: #e0a200;
      --primary-light: #fff8e1;
      --accent: #111111;
      --text-main: #1e2022;
      --text-muted: #5a626a;
      --bg-page: #fcfbf7;
      --bg-card: #ffffff;
      --border-color: #f0e6cf;
      --shadow-sm: 0 4px 12px rgba(245, 179, 0, 0.08);
      --shadow-md: 0 8px 24px rgba(20, 20, 20, 0.06);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--primary);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 42px;
      width: auto;
    }
    .brand-name {
      font-size: 20px;
      font-weight: 800;
      color: var(--accent);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      display: inline-block;
      padding: 10px 14px;
      font-size: 14px;
      font-weight: 600;
      color: #333333;
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover {
      color: #000000;
      background-color: var(--primary-light);
    }
    .header-action {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--primary);
      color: #111111;
      font-weight: 700;
      font-size: 14px;
      padding: 9px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid #dfa200;
      box-shadow: 0 2px 6px rgba(245, 179, 0, 0.3);
    }
    .btn-portal:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
    }
    .nav-toggle {
      display: none;
      background: none;
      border: 1px solid #ddd;
      padding: 6px 10px;
      border-radius: 6px;
      font-size: 18px;
      cursor: pointer;
    }

    /* 区域通用样式 */
    .section-block {
      padding: 70px 0;
      border-bottom: 1px solid rgba(240, 230, 207, 0.6);
    }
    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 46px;
    }
    .section-tag {
      display: inline-block;
      background: var(--primary-light);
      color: #946800;
      border: 1px solid #f6dd9e;
      padding: 4px 12px;
      font-size: 12px;
      font-weight: 700;
      border-radius: 30px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 14px;
      line-height: 1.25;
    }
    .section-subtitle {
      font-size: 15px;
      color: var(--text-muted);
    }

    /* 首屏 Hero - 严禁出现图片 */
    .hero-section {
      background: linear-gradient(180deg, #fffcf0 0%, #ffffff 100%);
      padding: 70px 0 60px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #fff;
      border: 1px solid var(--primary);
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 700;
      color: #8f6500;
      margin-bottom: 24px;
      box-shadow: 0 2px 8px rgba(245, 179, 0, 0.15);
    }
    .hero-title {
      font-size: 44px;
      font-weight: 900;
      color: var(--accent);
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-desc {
      font-size: 17px;
      color: #4b5259;
      max-width: 760px;
      margin: 0 auto 36px;
      line-height: 1.6;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-hero-primary {
      background: var(--primary);
      color: #111;
      font-size: 16px;
      font-weight: 800;
      padding: 14px 34px;
      border-radius: var(--radius-sm);
      border: 2px solid #222;
      box-shadow: 4px 4px 0 #222;
      transition: all 0.2s ease;
    }
    .btn-hero-primary:hover {
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0 #222;
      background: #ffbe1a;
    }
    .btn-hero-secondary {
      background: #ffffff;
      color: #222;
      font-size: 16px;
      font-weight: 700;
      padding: 14px 28px;
      border-radius: var(--radius-sm);
      border: 2px solid #ddd;
    }
    .btn-hero-secondary:hover {
      border-color: #222;
    }
    .hero-badges-row {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 10px;
      max-width: 840px;
      margin: 0 auto;
    }
    .model-chip {
      background: #ffffff;
      border: 1px solid #ebd9ab;
      padding: 5px 12px;
      border-radius: 6px;
      font-size: 12px;
      font-weight: 600;
      color: #444;
    }

    /* 指标卡片 */
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }
    .metric-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-top: 4px solid var(--primary);
      padding: 24px 20px;
      border-radius: var(--radius-md);
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
    .metric-value {
      font-size: 32px;
      font-weight: 900;
      color: var(--accent);
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .service-card {
      background: #fff;
      border: 1px solid var(--border-color);
      padding: 28px;
      border-radius: var(--radius-md);
      transition: all 0.25s ease;
      position: relative;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .card-icon-tag {
      display: inline-block;
      width: 44px;
      height: 44px;
      line-height: 44px;
      text-align: center;
      border-radius: 10px;
      background: var(--primary);
      color: #111;
      font-weight: 900;
      font-size: 18px;
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--accent);
    }
    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 流程步骤 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .process-item {
      background: #fff;
      border: 1px solid var(--border-color);
      padding: 24px 20px;
      border-radius: var(--radius-md);
      position: relative;
    }
    .step-num {
      width: 32px;
      height: 32px;
      background: #111;
      color: var(--primary);
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      margin-bottom: 14px;
    }
    .process-item h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .process-item p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 对比评测表格 */
    .eval-badge-box {
      background: linear-gradient(135deg, #fff9e6 0%, #ffffff 100%);
      border: 2px solid var(--primary);
      border-radius: var(--radius-md);
      padding: 28px;
      margin-bottom: 30px;
      display: flex;
      justify-content: space-around;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      box-shadow: var(--shadow-sm);
    }
    .eval-score-item {
      text-align: center;
    }
    .eval-score-num {
      font-size: 40px;
      font-weight: 900;
      color: #c98800;
    }
    .eval-star-tag {
      font-size: 20px;
      color: #f5b300;
      letter-spacing: 2px;
    }
    .table-responsive {
      overflow-x: auto;
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f0f0f0;
    }
    .custom-table th {
      background: #fffdf5;
      color: var(--accent);
      font-weight: 700;
      font-size: 14px;
    }
    .custom-table tr:hover td {
      background: #fffef8;
    }
    .col-highlight {
      background: #fffbee;
      font-weight: 700;
      color: #a46d00;
    }

    /* 案例展示区带真实图片 */
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 30px;
    }
    .media-showcase-box {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .img-wrap {
      width: 100%;
      background: #f7f5ee;
      overflow: hidden;
    }
    .media-info {
      padding: 20px;
    }
    .media-info h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .media-info p {
      font-size: 13px;
      color: var(--text-muted);
    }

    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 24px;
    }
    .banner-item {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
    }

    /* 评论板块 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: #fff;
      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-text {
      font-size: 14px;
      color: #333;
      margin-bottom: 20px;
      line-height: 1.6;
    }
    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f2ede2;
      padding-top: 14px;
    }
    .reviewer-avatar {
      width: 40px;
      height: 40px;
      background: var(--primary);
      color: #111;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
    }
    .reviewer-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--accent);
    }
    .reviewer-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* FAQ 手风琴 */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 15px;
      font-weight: 700;
      color: var(--accent);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }
    .faq-question:hover {
      background: #fffdf5;
    }
    .faq-toggle-icon {
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 14px;
      color: #555;
      line-height: 1.7;
      border-top: 1px solid #fcf7eb;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }

    /* 文章与外链 */
    .article-box {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 24px;
    }
    .link-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }
    .link-badges a {
      display: inline-block;
      padding: 8px 16px;
      background: #fffdf5;
      border: 1px solid #ead8a6;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
      color: #333;
    }
    .link-badges a:hover {
      background: var(--primary);
      color: #111;
      border-color: var(--primary);
    }

    /* 需求表单与联系 */
    .form-contact-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      color: #333;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #dcd3be;
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s ease;
      background: #faf9f5;
    }
    .form-control:focus {
      border-color: #222;
      background: #fff;
    }
    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }
    .btn-submit {
      width: 100%;
      background: var(--primary);
      color: #111;
      font-size: 15px;
      font-weight: 800;
      padding: 14px;
      border: 2px solid #222;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 3px 3px 0 #222;
    }
    .btn-submit:hover {
      background: #ffc425;
      transform: translateY(-1px);
    }

    .contact-info-list {
      list-style: none;
      margin-bottom: 24px;
    }
    .contact-info-list li {
      font-size: 14px;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .contact-qr-box {
      text-align: center;
      display: inline-block;
      border: 1px solid var(--border-color);
      padding: 14px;
      background: #fffcf2;
      border-radius: var(--radius-sm);
    }
    .contact-qr-box img {
      width: 130px;
      height: 130px;
      margin: 0 auto 8px;
    }

    /* 浮动组件 */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      background: #ffffff;
      border: 2px solid #222;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 3px 3px 0 rgba(0,0,0,0.2);
      font-weight: 800;
      font-size: 12px;
      cursor: pointer;
      color: #111;
    }
    .float-btn:hover {
      background: var(--primary);
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 3px solid var(--primary);
      padding: 50px 0 30px;
      color: #444;
    }
    .footer-content {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 12px;
      max-width: 420px;
      line-height: 1.6;
    }
    .footer-col h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 8px;
      font-size: 13px;
    }
    .footer-links li a:hover {
      color: #b58000;
    }
    .friend-links-row {
      border-top: 1px solid #eee;
      padding-top: 24px;
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 13px;
    }
    .friend-links-row a {
      color: #666;
    }
    .friend-links-row a:hover {
      color: #111;
      text-decoration: underline;
    }
    .footer-bottom {
      border-top: 1px solid #f0f0f0;
      padding-top: 20px;
      text-align: center;
      font-size: 12px;
      color: #888;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .metric-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .process-timeline { grid-template-columns: repeat(2, 1fr); }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .media-card-grid { grid-template-columns: 1fr; }
      .banner-gallery { grid-template-columns: repeat(2, 1fr); }
      .form-contact-wrap { grid-template-columns: 1fr; padding: 24px; }
      .footer-content { grid-template-columns: 1fr; gap: 30px; }
    }

    @media (max-width: 768px) {
      .nav-toggle { display: block; }
      .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        position: absolute;
        top: 72px;
        left: 0;
        background: #fff;
        border-bottom: 1px solid var(--border-color);
        padding: 12px 20px;
        box-shadow: 0 4px 10px rgba(0,0,0,0.05);
      }
      .nav-links.show { display: flex; }
      .nav-links li { width: 100%; }
      .nav-links li a { width: 100%; padding: 10px 0; }
      .hero-title { font-size: 30px; }
      .section-title { font-size: 26px; }
      .metric-grid, .grid-3, .grid-2, .process-timeline, .review-grid { grid-template-columns: 1fr; }
      .banner-gallery { grid-template-columns: 1fr; }
    }