:root {
      --primary: #FFD000;
      --primary-hover: #E6BC00;
      --primary-light: #FFF9E6;
      --primary-dark: #B8860B;
      --text-dark: #111827;
      --text-muted: #4B5563;
      --text-light: #6B7280;
      --bg-main: #FAFAFA;
      --bg-white: #FFFFFF;
      --bg-card: #FFFFFF;
      --border-color: #E5E7EB;
      --border-focus: #FFD000;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
      --shadow-hover: 0 16px 36px rgba(255,208,0,0.18);
      --radius: 12px;
      --max-width: 1240px;
      --transition: all 0.28s ease;
    }

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

    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-dark);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    /* 容器基准 */
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 2px solid #F3F4F6;
      box-shadow: var(--shadow-sm);
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      font-size: 1.25rem;
      color: var(--text-dark);
    }

    .brand-logo .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-dark);
      border-radius: 6px;
    }

    .nav-links li a:hover {
      color: var(--text-dark);
      background-color: var(--primary);
    }

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

    .btn-header-cta {
      background-color: var(--primary);
      color: var(--text-dark);
      font-weight: 700;
      padding: 10px 20px;
      border-radius: 8px;
      border: 1px solid #E5BA00;
      box-shadow: 0 4px 12px rgba(255, 208, 0, 0.3);
      font-size: 0.9rem;
    }

    .btn-header-cta:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-dark);
      padding: 6px;
    }

    /* 鲜黄质感按钮与徽章 */
    .badge-primary {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--primary-light);
      color: var(--text-dark);
      border: 1px solid var(--primary);
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 700;
      letter-spacing: 0.5px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 700;
      padding: 14px 28px;
      border-radius: 8px;
      cursor: pointer;
      transition: var(--transition);
      border: none;
      font-size: 1rem;
      text-align: center;
    }

    .btn-primary {
      background: var(--primary);
      color: var(--text-dark);
      box-shadow: 0 6px 18px rgba(255, 208, 0, 0.35);
      border: 1px solid #E5BA00;
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(255, 208, 0, 0.45);
    }

    .btn-dark {
      background: var(--text-dark);
      color: #FFFFFF;
      border: 1px solid #000;
    }

    .btn-dark:hover {
      background: #2D3748;
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      color: var(--text-dark);
      border: 2px solid var(--text-dark);
    }

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

    /* 区域通用样式 */
    .section-padding {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px auto;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-dark);
      margin-top: 12px;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 50%;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      background: var(--primary);
      border-radius: 2px;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 HERO（纯 CSS/矢量，无图片） */
    .hero-section {
      background: linear-gradient(180deg, #FFFDEB 0%, #FAFAFA 100%);
      padding: 90px 0 70px 0;
      position: relative;
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }

    .hero-glow-1 {
      position: absolute;
      top: -100px;
      left: 10%;
      width: 450px;
      height: 450px;
      background: radial-gradient(circle, rgba(255,208,0,0.22) 0%, rgba(255,255,255,0) 70%);
      pointer-events: none;
    }

    .hero-glow-2 {
      position: absolute;
      bottom: -50px;
      right: 15%;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(255,230,0,0.18) 0%, rgba(255,255,255,0) 70%);
      pointer-events: none;
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero-h1 {
      font-size: 2.7rem;
      font-weight: 900;
      color: var(--text-dark);
      line-height: 1.25;
      margin: 20px 0 18px 0;
      letter-spacing: -0.5px;
    }

    .hero-h1 span {
      background: linear-gradient(180deg, transparent 65%, var(--primary) 65%);
      padding: 0 4px;
      display: inline-block;
    }

    .hero-desc {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.8;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-features-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .hero-feature-card {
      background: #FFFFFF;
      border: 1px solid #F0F0F0;
      padding: 20px 16px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
      border-top: 3px solid var(--primary);
    }

    .hero-feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .hero-feature-num {
      font-size: 1.6rem;
      font-weight: 900;
      color: var(--text-dark);
      margin-bottom: 4px;
    }

    .hero-feature-txt {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 平台介绍 & 多模型聚合板块 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }

    .intro-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .intro-point-list {
      list-style: none;
      display: grid;
      gap: 16px;
      margin-top: 24px;
    }

    .intro-point-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }

    .intro-point-icon {
      width: 24px;
      height: 24px;
      background: var(--primary);
      color: var(--text-dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.85rem;
      font-weight: 900;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .models-tags-box {
      background: #FFFDEB;
      border: 2px dashed #FFD000;
      border-radius: var(--radius);
      padding: 30px;
    }

    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 18px;
    }

    .model-tag {
      background: #FFFFFF;
      border: 1px solid #E5E7EB;
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-dark);
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
      transition: var(--transition);
    }

    .model-tag:hover {
      background: var(--primary);
      transform: translateY(-2px);
    }

    /* AIGC 全功能矩阵网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }

    .service-card:hover {
      border-color: var(--primary);
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }

    .service-badge {
      align-self: flex-start;
      font-size: 0.75rem;
      font-weight: 800;
      padding: 4px 10px;
      border-radius: 4px;
      background: #FFF8CC;
      color: #996B00;
      margin-bottom: 16px;
    }

    .service-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 12px;
    }

    .service-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }

    .service-features {
      list-style: none;
      font-size: 0.85rem;
      color: var(--text-dark);
      display: grid;
      gap: 6px;
      margin-top: auto;
      border-top: 1px solid #F3F4F6;
      padding-top: 12px;
    }

    .service-features li::before {
      content: '✓';
      color: var(--primary-dark);
      font-weight: 900;
      margin-right: 6px;
    }

    /* 案例展示区（含图片素材规范接入） */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
      align-items: stretch;
    }

    .showcase-card {
      background: #FFFFFF;
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .showcase-img-wrap {
      width: 100%;
      background: #F3F4F6;
      position: relative;
      overflow: hidden;
    }

    .showcase-img-wrap img {
      width: 100%;
      height: 260px;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .showcase-card:hover .showcase-img-wrap img {
      transform: scale(1.03);
    }

    .showcase-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .showcase-body h3 {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .showcase-body p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 行业方案与流程 */
    .steps-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px 20px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-badge-num {
      width: 44px;
      height: 44px;
      background: var(--primary);
      color: var(--text-dark);
      font-weight: 900;
      font-size: 1.2rem;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px auto;
      box-shadow: 0 4px 10px rgba(255,208,0,0.4);
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测高亮板块 */
    .eval-box {
      background: #FFFFFF;
      border: 2px solid var(--primary);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-hover);
    }

    .eval-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 30px;
      padding-bottom: 24px;
      border-bottom: 1px solid #E5E7EB;
    }

    .score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
      background: #FFFDEB;
      padding: 14px 24px;
      border-radius: 12px;
      border: 1px solid #FFD000;
    }

    .score-num {
      font-size: 2.4rem;
      font-weight: 900;
      color: #D97706;
      line-height: 1;
    }

    .score-stars {
      color: #FFB800;
      font-size: 1.3rem;
      letter-spacing: 2px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #F3F4F6;
    }

    .eval-table th {
      background: #FFFBE6;
      color: var(--text-dark);
      font-weight: 800;
    }

    .eval-table td.highlight {
      background: #FFFEF5;
      font-weight: 700;
      color: #92400E;
    }

    /* Token 比价与代理加盟 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .token-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .token-card.popular {
      border: 2px solid var(--primary);
      transform: scale(1.02);
      box-shadow: var(--shadow-hover);
    }

    .token-price {
      font-size: 2rem;
      font-weight: 900;
      color: var(--text-dark);
      margin: 16px 0;
    }

    .token-price span {
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-muted);
    }

    /* 客户评价板块 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .review-avatar-char {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: var(--text-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
    }

    .review-user h4 {
      font-size: 1rem;
      font-weight: 800;
    }

    .review-user span {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .review-content {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      display: grid;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 800;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

    .faq-icon {
      font-size: 1.2rem;
      font-weight: 700;
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #FCFCFD;
    }

    .faq-answer p {
      padding: 0 24px 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 需求表单与联系 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .contact-info-panel h3 {
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .contact-item-box {
      display: grid;
      gap: 16px;
      margin: 24px 0;
    }

    .contact-row {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      font-weight: 600;
    }

    .qr-box {
      background: #FFFDEB;
      padding: 16px;
      border-radius: 10px;
      display: inline-block;
      border: 1px dashed var(--primary);
      text-align: center;
    }

    .qr-box img {
      width: 130px;
      height: 130px;
      object-fit: contain;
      margin: 0 auto 8px auto;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-dark);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      background: #F9FAFB;
      transition: var(--transition);
      outline: none;
    }

    .form-control:focus {
      border-color: #FFD000;
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(255, 208, 0, 0.2);
    }

    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    /* 资讯与文章列表 */
    .articles-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
    }

    .article-links-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-top: 16px;
      list-style: none;
    }

    .article-links-list li a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 18px;
      background: #F9FAFB;
      border-radius: 8px;
      border: 1px solid #E5E7EB;
      font-size: 0.9rem;
      font-weight: 600;
    }

    .article-links-list li a:hover {
      background: #FFFBE6;
      border-color: var(--primary);
    }

    /* 底部通用 Footer */
    .site-footer {
      background: #111827;
      color: #E5E7EB;
      padding: 60px 0 30px 0;
      font-size: 0.9rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .footer-brand p {
      color: #9CA3AF;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      color: #FFFFFF;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 16px;
      position: relative;
      padding-bottom: 8px;
    }

    .footer-col h5::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 24px;
      height: 2px;
      background: var(--primary);
    }

    .footer-links {
      list-style: none;
      display: grid;
      gap: 8px;
    }

    .footer-links li a {
      color: #9CA3AF;
    }

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

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 10px;
    }

    .friend-links-wrap a {
      color: #9CA3AF;
      background: #1F2937;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.8rem;
    }

    .friend-links-wrap a:hover {
      background: var(--primary);
      color: var(--text-dark);
    }

    .footer-bottom {
      border-top: 1px solid #374151;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      color: #6B7280;
      font-size: 0.85rem;
    }

    /* 悬浮工具栏 */
    .float-panel {
      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: #FFFFFF;
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      cursor: pointer;
      transition: var(--transition);
      color: var(--text-dark);
    }

    .float-btn:hover {
      background: var(--primary);
      transform: translateY(-3px);
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .services-grid, .token-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-flow {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .intro-grid, .contact-wrapper {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        border-bottom: 2px solid var(--primary);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .hero-h1 {
        font-size: 2rem;
      }
      .hero-features-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .services-grid, .token-grid, .reviews-grid, .showcase-grid, .steps-flow {
        grid-template-columns: 1fr;
      }
      .article-links-list {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .eval-header {
        flex-direction: column;
        align-items: flex-start;
      }
      .section-padding {
        padding: 50px 0;
      }
    }