:root {
      --primary-yellow: #FFD000;
      --primary-yellow-hover: #F2C400;
      --primary-yellow-light: #FFF9D2;
      --primary-yellow-glow: rgba(255, 208, 0, 0.35);
      --dark-text: #17181C;
      --body-text: #3D404A;
      --muted-text: #6B7280;
      --light-border: #E5E7EB;
      --pure-white: #FFFFFF;
      --warm-bg: #FCFBF7;
      --card-bg: #FFFFFF;
      --accent-black: #121316;
      --container-max: 1200px;
      --border-radius: 14px;
      --transition: all 0.28s ease-in-out;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--warm-bg);
      color: var(--body-text);
      line-height: 1.65;
      font-size: 16px;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(229, 231, 235, 0.8);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-weight: 500;
      font-size: 15px;
      color: var(--dark-text);
      padding: 10px 14px;
      border-radius: 8px;
    }
    .nav-links li a:hover {
      color: #000;
      background: var(--primary-yellow-light);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-nav-primary {
      background: var(--primary-yellow);
      color: var(--accent-black);
      padding: 9px 20px;
      font-size: 14px;
      font-weight: 700;
      border-radius: 99px;
      border: 1px solid #E5B800;
      box-shadow: 0 4px 12px var(--primary-yellow-glow);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .btn-nav-primary:hover {
      background: var(--primary-yellow-hover);
      transform: translateY(-1px);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-btn span {
      display: block;
      width: 22px;
      height: 2.5px;
      background: var(--dark-text);
      margin: 4px 0;
      transition: var(--transition);
    }

    /* 首屏 Hero - 严格无图片 */
    .hero-section {
      position: relative;
      background: linear-gradient(175deg, #FFFDE8 0%, #FFF8CF 45%, #FCFBF7 100%);
      padding: 90px 0 80px;
      overflow: hidden;
      border-bottom: 1px solid #F0ECE1;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FFFFFF;
      border: 1px solid #FFE066;
      padding: 6px 18px;
      border-radius: 99px;
      font-size: 14px;
      font-weight: 600;
      color: #925C00;
      margin-bottom: 24px;
      box-shadow: 0 4px 14px rgba(255, 208, 0, 0.2);
    }
    .hero-badge::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #E5A800;
      display: inline-block;
    }
    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-title {
      font-size: 46px;
      line-height: 1.25;
      color: var(--accent-black);
      font-weight: 900;
      letter-spacing: -0.5px;
      margin-bottom: 22px;
    }
    .hero-title .highlight {
      background: linear-gradient(180deg, transparent 65%, #FFE766 65%);
      display: inline;
      padding: 0 4px;
    }
    .hero-desc {
      font-size: 19px;
      color: #4B5563;
      max-width: 780px;
      margin: 0 auto 36px;
      line-height: 1.6;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-hero-primary {
      background: var(--primary-yellow);
      color: #121316;
      font-size: 17px;
      font-weight: 800;
      padding: 15px 36px;
      border-radius: 99px;
      border: 2px solid #E6B500;
      box-shadow: 0 8px 24px rgba(255, 208, 0, 0.45);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-hero-primary:hover {
      background: var(--primary-yellow-hover);
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(255, 208, 0, 0.55);
    }
    .btn-hero-secondary {
      background: #FFFFFF;
      color: var(--dark-text);
      font-size: 16px;
      font-weight: 700;
      padding: 15px 30px;
      border-radius: 99px;
      border: 1px solid var(--light-border);
      box-shadow: 0 4px 14px rgba(0,0,0,0.04);
    }
    .btn-hero-secondary:hover {
      border-color: #CBD5E1;
      background: #F8FAFC;
    }

    /* 抽象几何数字卡片 */
    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 20px;
    }
    .metric-item {
      background: rgba(255, 255, 255, 0.95);
      border: 1px solid #F3E8C4;
      border-radius: var(--border-radius);
      padding: 22px 16px;
      text-align: center;
      box-shadow: 0 8px 20px rgba(220, 180, 0, 0.08);
      transition: var(--transition);
    }
    .metric-item:hover {
      transform: translateY(-3px);
      border-color: var(--primary-yellow);
      box-shadow: 0 12px 26px rgba(220, 180, 0, 0.16);
    }
    .metric-value {
      font-size: 32px;
      font-weight: 900;
      color: #B47800;
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 14px;
      color: var(--muted-text);
      font-weight: 600;
    }

    /* 通用章节样式 */
    .section-wrap {
      padding: 85px 0;
      position: relative;
    }
    .section-bg-alt {
      background-color: #F8F7F0;
      border-top: 1px solid #ECE7D9;
      border-bottom: 1px solid #ECE7D9;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 52px;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: #9A6700;
      background: var(--primary-yellow-light);
      padding: 5px 14px;
      border-radius: 99px;
      margin-bottom: 12px;
      border: 1px solid #FFE680;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      color: var(--accent-black);
      line-height: 1.35;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--muted-text);
      line-height: 1.6;
    }

    /* 关于我们 / 平台介绍 */
    .about-card-wrap {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      align-items: stretch;
    }
    .about-main-box {
      background: #FFFFFF;
      border: 1px solid var(--light-border);
      border-radius: var(--border-radius);
      padding: 40px;
      box-shadow: 0 6px 24px rgba(0, 0, 0, 0.03);
    }
    .about-main-box h3 {
      font-size: 24px;
      font-weight: 800;
      color: var(--accent-black);
      margin-bottom: 18px;
    }
    .about-main-box p {
      font-size: 15px;
      color: var(--body-text);
      margin-bottom: 16px;
      line-height: 1.75;
    }
    .model-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 24px;
    }
    .model-chip {
      background: #F4F4F5;
      color: #374151;
      font-size: 12px;
      font-weight: 600;
      padding: 6px 12px;
      border-radius: 6px;
      border: 1px solid #E5E7EB;
    }
    .about-side-features {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .feature-box {
      background: #FFFFFF;
      border: 1px solid #EFEAE0;
      border-left: 5px solid var(--primary-yellow);
      border-radius: var(--border-radius);
      padding: 22px 26px;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.02);
      transition: var(--transition);
    }
    .feature-box:hover {
      transform: translateX(4px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
    }
    .feature-box h4 {
      font-size: 18px;
      font-weight: 700;
      color: var(--accent-black);
      margin-bottom: 8px;
    }
    .feature-box p {
      font-size: 14px;
      color: var(--muted-text);
      line-height: 1.6;
    }

    /* 服务场景网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: #FFFFFF;
      border: 1px solid #EBE5D8;
      border-radius: var(--border-radius);
      padding: 28px 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      box-shadow: 0 4px 18px rgba(0, 0, 0, 0.03);
    }
    .service-card:hover {
      transform: translateY(-4px);
      border-color: #E6C200;
      box-shadow: 0 14px 30px rgba(255, 208, 0, 0.18);
    }
    .service-icon-box {
      width: 48px;
      height: 48px;
      background: var(--primary-yellow-light);
      border: 1px solid #FFDE59;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 18px;
      color: #925C00;
      font-weight: 900;
    }
    .service-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--accent-black);
      margin-bottom: 10px;
    }
    .service-card p {
      font-size: 14px;
      color: var(--muted-text);
      line-height: 1.65;
      flex-grow: 1;
    }
    .service-tag-label {
      font-size: 12px;
      color: #B47800;
      font-weight: 700;
      margin-top: 14px;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 标准流程时间线 */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }
    .workflow-step-card {
      background: #FFFFFF;
      border: 1px solid #ECE7D9;
      border-radius: var(--border-radius);
      padding: 24px 18px;
      text-align: center;
      position: relative;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.02);
    }
    .step-number {
      width: 40px;
      height: 40px;
      line-height: 40px;
      background: var(--primary-yellow);
      color: #121316;
      border-radius: 50%;
      font-weight: 800;
      font-size: 16px;
      margin: 0 auto 14px;
      border: 2px solid #FFFFFF;
      box-shadow: 0 4px 10px var(--primary-yellow-glow);
    }
    .workflow-step-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--accent-black);
      margin-bottom: 8px;
    }
    .workflow-step-card p {
      font-size: 13px;
      color: var(--muted-text);
      line-height: 1.5;
    }

    /* 案例展示区带真实图片 */
    .showcase-banner-area {
      background: #FFFFFF;
      border: 1px solid var(--light-border);
      border-radius: var(--border-radius);
      padding: 30px;
      margin-bottom: 30px;
      box-shadow: 0 6px 20px rgba(0,0,0,0.03);
    }
    .media-grid-mixed {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 20px;
      align-items: center;
    }
    .media-box-item {
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid #EAE6D8;
      background: #F9F9FB;
    }
    .media-box-item img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
      object-fit: cover;
    }
    .media-box-item:hover img {
      transform: scale(1.02);
    }
    .media-desc {
      padding: 12px 14px;
      background: #FFFFFF;
      font-size: 13px;
      font-weight: 600;
      color: var(--dark-text);
      border-top: 1px solid #F0ECE0;
    }

    /* 对比评测高亮板块 */
    .compare-container {
      background: #FFFFFF;
      border: 2px solid #FFD000;
      border-radius: var(--border-radius);
      padding: 36px;
      box-shadow: 0 10px 30px rgba(255, 208, 0, 0.15);
    }
    .compare-badge-strip {
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: var(--primary-yellow-light);
      border: 1px solid #FFE580;
      border-radius: 10px;
      padding: 16px 24px;
      margin-bottom: 28px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .rating-highlight {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }
    .rating-highlight .score {
      font-size: 38px;
      font-weight: 900;
      color: #925C00;
    }
    .rating-highlight .stars {
      color: #E5A100;
      font-size: 20px;
      letter-spacing: 2px;
    }
    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 15px;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #EAE6D8;
    }
    .custom-table th {
      background: #FBF9F0;
      font-weight: 700;
      color: var(--accent-black);
    }
    .custom-table td.col-brand {
      background: #FFFCED;
      font-weight: 700;
      color: #8C5800;
    }

    /* 需求匹配与表单 */
    .match-form-grid {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 40px;
      background: #FFFFFF;
      border: 1px solid #EFEAE0;
      border-radius: var(--border-radius);
      padding: 44px;
      box-shadow: 0 8px 30px rgba(0,0,0,0.03);
    }
    .form-info-side h3 {
      font-size: 26px;
      font-weight: 800;
      color: var(--accent-black);
      margin-bottom: 16px;
    }
    .form-info-side p {
      font-size: 15px;
      color: var(--muted-text);
      margin-bottom: 24px;
      line-height: 1.7;
    }
    .contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 15px;
      margin-bottom: 14px;
      color: var(--body-text);
    }
    .contact-item strong {
      color: var(--dark-text);
      min-width: 80px;
    }
    .form-wrapper form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--dark-text);
      margin-bottom: 6px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #D1D5DB;
      border-radius: 8px;
      font-size: 15px;
      background: #FAFAFA;
      transition: var(--transition);
      color: var(--dark-text);
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: #E5B800;
      background: #FFFFFF;
      box-shadow: 0 0 0 3px var(--primary-yellow-glow);
    }
    .btn-submit-form {
      background: var(--primary-yellow);
      color: #121316;
      border: 1px solid #E5B800;
      padding: 14px 28px;
      font-size: 16px;
      font-weight: 800;
      border-radius: 8px;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 4px 14px var(--primary-yellow-glow);
    }
    .btn-submit-form:hover {
      background: var(--primary-yellow-hover);
      transform: translateY(-2px);
    }

    /* 客户评价板块 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid #EFEAE0;
      border-radius: var(--border-radius);
      padding: 26px;
      box-shadow: 0 4px 18px rgba(0, 0, 0, 0.02);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 14px;
      color: #374151;
      line-height: 1.7;
      margin-bottom: 18px;
      font-style: normal;
    }
    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F3F1E7;
      padding-top: 14px;
    }
    .avatar-char {
      width: 42px;
      height: 42px;
      background: var(--primary-yellow-light);
      color: #925C00;
      border: 1px solid #FFE066;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
    }
    .user-meta h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--accent-black);
    }
    .user-meta span {
      font-size: 13px;
      color: var(--muted-text);
    }

    /* FAQ 折叠面板 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-accordion-item {
      background: #FFFFFF;
      border: 1px solid #ECE7D9;
      border-radius: 10px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-accordion-item.active {
      border-color: #E6C200;
      box-shadow: 0 6px 18px rgba(255, 208, 0, 0.12);
    }
    .faq-question-btn {
      width: 100%;
      background: none;
      border: none;
      text-align: left;
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--accent-black);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-question-btn .toggle-icon {
      font-size: 18px;
      color: #8C5800;
      transition: transform 0.2s ease;
    }
    .faq-accordion-item.active .toggle-icon {
      transform: rotate(180deg);
    }
    .faq-answer-body {
      padding: 0 24px 20px;
      font-size: 14px;
      color: #4B5563;
      line-height: 1.7;
      display: none;
    }
    .faq-accordion-item.active .faq-answer-body {
      display: block;
    }

    /* 资讯与友情链接 */
    .articles-list-box {
      background: #FFFFFF;
      border: 1px solid #EFEAE0;
      border-radius: var(--border-radius);
      padding: 28px;
    }
    .articles-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }
    .article-item-link {
      background: #F9F8F3;
      border: 1px solid #EBE6D7;
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 14px;
      color: var(--dark-text);
      transition: var(--transition);
    }
    .article-item-link:hover {
      background: var(--primary-yellow-light);
      border-color: #FFDE59;
    }

    /* 页脚 */
    .site-footer {
      background: #17181C;
      color: #9CA3AF;
      padding: 70px 0 35px;
      border-top: 4px solid var(--primary-yellow);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 18px;
      position: relative;
    }
    .footer-col p {
      font-size: 14px;
      line-height: 1.7;
      margin-bottom: 12px;
    }
    .footer-links-list {
      list-style: none;
    }
    .footer-links-list li {
      margin-bottom: 10px;
    }
    .footer-links-list a {
      color: #9CA3AF;
      font-size: 14px;
    }
    .footer-links-list a:hover {
      color: var(--primary-yellow);
    }
    .qr-box-wrap {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .qr-box-wrap img {
      width: 96px;
      height: 96px;
      background: #FFF;
      border-radius: 8px;
      padding: 4px;
    }
    .qr-box-text {
      font-size: 13px;
      color: #D1D5DB;
    }
    .footer-bottom {
      border-top: 1px solid #2B2D33;
      padding-top: 25px;
      text-align: center;
      font-size: 13px;
      color: #6B7280;
    }
    .friend-links-bar {
      margin-bottom: 15px;
      font-size: 13px;
    }
    .friend-links-bar a {
      color: #9CA3AF;
      margin: 0 10px;
    }
    .friend-links-bar a:hover {
      color: var(--primary-yellow);
    }

    /* 浮动客服小工具 */
    .floating-tools {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-tool-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #FFFFFF;
      border: 1px solid #E5E7EB;
      box-shadow: 0 6px 16px rgba(0,0,0,0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--accent-black);
      font-weight: 700;
      font-size: 14px;
      transition: var(--transition);
    }
    .float-tool-btn.btn-qr {
      background: var(--primary-yellow);
      border-color: #E5B800;
    }
    .float-tool-btn:hover {
      transform: scale(1.08);
    }

    /* 响应式样式 */
    @media (max-width: 1024px) {
      .services-grid, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-steps {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        border-bottom: 1px solid var(--light-border);
        padding: 16px 24px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 12px 0;
        border-bottom: 1px solid #F3F4F6;
      }
      .hero-title {
        font-size: 30px;
      }
      .hero-desc {
        font-size: 16px;
      }
      .about-card-wrap, .match-form-grid {
        grid-template-columns: 1fr;
      }
      .media-grid-mixed {
        grid-template-columns: 1fr;
      }
      .services-grid, .testimonials-grid, .workflow-steps {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }