:root {
      --primary-yellow: #FFD000;
      --accent-gold: #FFB703;
      --deep-charcoal: #1E1F24;
      --text-main: #23272F;
      --text-muted: #5C6370;
      --bg-light: #FAFAFA;
      --bg-white: #FFFFFF;
      --card-border: #EAECEF;
      --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
      --card-shadow-hover: 0 16px 40px rgba(255, 183, 3, 0.16);
      --container-width: 1200px;
    }

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

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

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

    /* 顶部导航 */
    header.site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--card-border);
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .brand-logo-wrap .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }
    .brand-name {
      font-size: 20px;
      font-weight: 800;
      color: var(--deep-charcoal);
      letter-spacing: -0.5px;
    }
    .brand-tag {
      background: var(--primary-yellow);
      color: var(--deep-charcoal);
      font-size: 11px;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 4px;
    }
    nav.main-nav {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      list-style: none;
      align-items: center;
      gap: 0;
    }
    .nav-links a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 600;
      font-size: 14px;
      padding: 8px 12px;
      border-radius: 6px;
      transition: all 0.2s ease;
    }
    .nav-links a:hover {
      background: rgba(255, 208, 0, 0.2);
      color: #000000;
    }
    .nav-cta-btn {
      background: var(--primary-yellow);
      color: var(--deep-charcoal);
      padding: 9px 20px;
      font-size: 14px;
      font-weight: 700;
      border-radius: 30px;
      text-decoration: none;
      border: 1px solid var(--accent-gold);
      box-shadow: 0 4px 12px rgba(255, 183, 3, 0.25);
      transition: all 0.2s ease;
      margin-left: 10px;
    }
    .nav-cta-btn:hover {
      background: var(--accent-gold);
      transform: translateY(-1px);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--deep-charcoal);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 按钮基础 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 28px;
      font-size: 15px;
      font-weight: 700;
      border-radius: 8px;
      text-decoration: none;
      transition: all 0.25s ease;
      cursor: pointer;
      border: none;
    }
    .btn-glow-yellow {
      background: var(--primary-yellow);
      color: var(--deep-charcoal);
      box-shadow: 0 6px 20px rgba(255, 183, 3, 0.4);
      border: 1px solid #E5A800;
    }
    .btn-glow-yellow:hover {
      background: var(--accent-gold);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(255, 183, 3, 0.5);
    }
    .btn-outline-dark {
      background: #FFFFFF;
      color: var(--deep-charcoal);
      border: 1.5px solid var(--deep-charcoal);
    }
    .btn-outline-dark:hover {
      background: #F4F5F7;
      transform: translateY(-2px);
    }

    /* Hero 首屏 (无图规范) */
    section.hero-section {
      padding: 80px 0 60px;
      background: radial-gradient(circle at 50% 10%, rgba(255, 208, 0, 0.22) 0%, rgba(250, 250, 250, 0) 70%);
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #FFF;
      border: 1px solid rgba(255, 183, 3, 0.4);
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 700;
      color: #946200;
      margin-bottom: 24px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    }
    .hero-badge .dot {
      width: 8px;
      height: 8px;
      background: #FFB703;
      border-radius: 50%;
    }
    h1.hero-title {
      font-size: 42px;
      font-weight: 900;
      color: var(--deep-charcoal);
      line-height: 1.25;
      letter-spacing: -1px;
      margin-bottom: 20px;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }
    .hero-stats-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #FFFFFF;
      padding: 24px;
      border-radius: 16px;
      border: 1px solid var(--card-border);
      box-shadow: var(--card-shadow);
      max-width: 960px;
      margin: 0 auto;
    }
    .stat-item {
      text-align: center;
      border-right: 1px solid #F0F2F5;
    }
    .stat-item:last-child {
      border-right: none;
    }
    .stat-val {
      font-size: 26px;
      font-weight: 800;
      color: var(--deep-charcoal);
    }
    .stat-val span {
      color: #D97706;
      font-size: 18px;
    }
    .stat-lbl {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 区域统一标准 */
    section.page-block {
      padding: 72px 0;
    }
    .block-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }
    .block-subtitle {
      font-size: 13px;
      font-weight: 800;
      color: #B45309;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }
    .block-header h2 {
      font-size: 32px;
      font-weight: 800;
      color: var(--deep-charcoal);
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }
    .block-header p {
      color: var(--text-muted);
      font-size: 15px;
    }

    /* 模型矩阵胶囊云 */
    .model-pills-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 24px;
    }
    .model-pill {
      background: #FFFFFF;
      border: 1px solid var(--card-border);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: var(--deep-charcoal);
      box-shadow: 0 2px 5px rgba(0,0,0,0.03);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .model-pill::before {
      content: "";
      width: 6px;
      height: 6px;
      background: var(--primary-yellow);
      border-radius: 50%;
    }

    /* 服务场景九宫格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: #FFFFFF;
      border: 1px solid var(--card-border);
      border-radius: 14px;
      padding: 28px;
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
      position: relative;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: rgba(255, 183, 3, 0.6);
    }
    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(255, 208, 0, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      color: #946200;
      font-size: 18px;
      margin-bottom: 18px;
    }
    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--deep-charcoal);
    }
    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 平台特色图文展示区 */
    .showcase-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      margin-bottom: 50px;
    }
    .showcase-row.reverse {
      direction: rtl;
    }
    .showcase-row.reverse .showcase-text {
      direction: ltr;
    }
    .showcase-text h3 {
      font-size: 26px;
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--deep-charcoal);
    }
    .showcase-text p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .feature-list {
      list-style: none;
      margin-bottom: 24px;
    }
    .feature-list li {
      position: relative;
      padding-left: 24px;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .feature-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      color: #D97706;
      font-weight: 900;
    }
    .showcase-media {
      background: #FFFFFF;
      border: 1px solid var(--card-border);
      border-radius: 16px;
      padding: 12px;
      box-shadow: var(--card-shadow);
      overflow: hidden;
    }
    .showcase-media img {
      width: 100%;
      height: auto;
      border-radius: 10px;
      display: block;
    }

    /* 对比评测卡片与表格 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #FFF9E6 0%, #FFFFFF 100%);
      border: 2px solid var(--primary-yellow);
      border-radius: 16px;
      padding: 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 36px;
      box-shadow: 0 10px 30px rgba(255, 183, 3, 0.15);
    }
    .eval-score-num {
      font-size: 48px;
      font-weight: 900;
      color: #B45309;
      line-height: 1;
    }
    .eval-score-stars {
      color: #F59E0B;
      font-size: 20px;
      margin-top: 6px;
    }
    .eval-meta {
      font-size: 14px;
      color: var(--text-muted);
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #FFFFFF;
      border-radius: 14px;
      border: 1px solid var(--card-border);
      box-shadow: var(--card-shadow);
    }
    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    table.compare-table th, table.compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--card-border);
    }
    table.compare-table th {
      background: #F9FAFB;
      font-weight: 700;
      color: var(--deep-charcoal);
    }
    table.compare-table tr:last-child td {
      border-bottom: none;
    }
    table.compare-table .badge-best {
      background: var(--primary-yellow);
      color: #000;
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 700;
      font-size: 12px;
    }

    /* 流程与步骤 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .process-step-card {
      background: #FFFFFF;
      border: 1px solid var(--card-border);
      border-radius: 12px;
      padding: 24px;
      position: relative;
    }
    .step-number {
      font-size: 28px;
      font-weight: 900;
      color: #D97706;
      opacity: 0.8;
      margin-bottom: 12px;
    }
    .process-step-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .process-step-card p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--card-border);
      border-radius: 14px;
      padding: 24px;
      box-shadow: var(--card-shadow);
    }
    .t-user-role {
      font-size: 13px;
      font-weight: 700;
      color: #B45309;
      margin-bottom: 6px;
    }
    .t-quote {
      font-size: 14px;
      color: var(--text-main);
      font-style: italic;
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .t-author {
      font-size: 13px;
      font-weight: 700;
      color: var(--deep-charcoal);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--card-border);
      border-radius: 10px;
      overflow: hidden;
      transition: all 0.2s ease;
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 15px;
      font-weight: 700;
      color: var(--deep-charcoal);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 18px;
      font-weight: 400;
      color: #B45309;
      transition: transform 0.2s;
    }
    .faq-item.active .faq-question::after {
      content: "-";
      transform: rotate(180deg);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 表单与需求匹配 */
    .form-wrapper {
      max-width: 680px;
      margin: 0 auto;
      background: #FFFFFF;
      border: 1px solid var(--card-border);
      border-radius: 16px;
      padding: 36px;
      box-shadow: var(--card-shadow);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--deep-charcoal);
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--card-border);
      border-radius: 8px;
      font-size: 14px;
      background: #FAFAFA;
      color: var(--text-main);
      transition: border-color 0.2s;
    }
    .form-control:focus {
      outline: none;
      border-color: #FFB703;
      background: #FFF;
    }
    textarea.form-control {
      min-height: 100px;
      resize: vertical;
    }

    /* 行业资讯 / 最新文章 */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 16px;
      margin-top: 24px;
    }
    .article-card {
      background: #FFFFFF;
      border: 1px solid var(--card-border);
      padding: 16px;
      border-radius: 10px;
      text-decoration: none;
      color: var(--deep-charcoal);
      font-size: 13px;
      font-weight: 600;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: all 0.2s;
    }
    .article-card:hover {
      border-color: var(--accent-gold);
      transform: translateY(-2px);
    }

    /* 页脚与友情链接 */
    footer.site-footer {
      background: #18191C;
      color: #9CA3AF;
      padding: 60px 0 30px;
      font-size: 13px;
    }
    .footer-content {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 18px;
      margin-bottom: 12px;
      font-weight: 800;
    }
    .footer-brand p {
      line-height: 1.6;
      margin-bottom: 16px;
      max-width: 320px;
    }
    .footer-col h5 {
      color: #FFFFFF;
      font-size: 14px;
      margin-bottom: 14px;
      font-weight: 700;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-links a {
      color: #9CA3AF;
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: var(--primary-yellow);
    }
    .friend-links-box {
      border-top: 1px solid #282A30;
      padding-top: 20px;
      margin-bottom: 24px;
    }
    .friend-links-box span {
      color: #6B7280;
      margin-right: 12px;
      font-weight: 700;
    }
    .friend-links-box a {
      color: #9CA3AF;
      text-decoration: none;
      margin-right: 16px;
      display: inline-block;
      margin-bottom: 6px;
    }
    .friend-links-box a:hover {
      color: var(--primary-yellow);
    }
    .footer-bottom {
      border-top: 1px solid #282A30;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .footer-bottom a {
      color: #9CA3AF;
      text-decoration: none;
    }
    .footer-bottom a:hover {
      color: #FFF;
    }

    /* 浮动客服悬挂 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 40px;
      background: #FFFFFF;
      border: 2px solid var(--primary-yellow);
      border-radius: 12px;
      padding: 12px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
      z-index: 999;
      text-align: center;
      width: 140px;
    }
    .float-kefu img {
      width: 100%;
      height: auto;
      border-radius: 6px;
      display: block;
      margin-bottom: 6px;
    }
    .float-kefu-txt {
      font-size: 11px;
      font-weight: 700;
      color: var(--deep-charcoal);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .services-grid, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .showcase-row {
        grid-template-columns: 1fr;
      }
      .footer-content {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      h1.hero-title {
        font-size: 30px;
      }
      .hero-stats-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .services-grid, .testimonials-grid {
        grid-template-columns: 1fr;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .mobile-menu-toggle {
        display: block;
      }
      nav.main-nav {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        padding: 20px;
      }
      nav.main-nav.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 0;
      }
      .nav-cta-btn {
        margin: 16px 0 0 0;
        width: 100%;
        text-align: center;
      }
      .eval-highlight-box {
        flex-direction: column;
        text-align: center;
        gap: 16px;
      }
      .footer-content {
        grid-template-columns: 1fr;
      }
      .float-kefu {
        display: none;
      }
    }