:root {
      --primary: #10b981;
      --primary-dark: #059669;
      --primary-light: #d1fae5;
      --primary-soft: #ecfdf5;
      --mint-accent: #065f46;
      --text-main: #1e293b;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --bg-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --border-focus: #10b981;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 12px rgba(16, 185, 129, 0.08);
      --shadow-lg: 0 10px 25px -5px rgba(16, 185, 129, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --transition: all 0.25s ease;
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

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

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

    /* 统一居中容器 */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .section-wrap {
      padding: 70px 0;
      position: relative;
    }

    .section-wrap.bg-light {
      background-color: #f4fbf7;
    }

    .section-wrap.bg-white {
      background-color: #ffffff;
    }

    /* 标题规范 */
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 45px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--mint-accent);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 30px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
    }

    .btn-primary:hover {
      background-color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(16, 185, 129, 0.4);
    }

    .btn-outline {
      border-color: var(--primary);
      color: var(--mint-accent);
      background: #ffffff;
    }

    .btn-outline:hover {
      background: var(--primary-soft);
      border-color: var(--primary-dark);
      transform: translateY(-2px);
    }

    .btn-lg {
      padding: 15px 32px;
      font-size: 1.05rem;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-box img {
      max-height: 38px;
      width: auto;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--mint-accent);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      font-size: 0.92rem;
      color: var(--text-muted);
      font-weight: 500;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }

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

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .nav-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      color: var(--text-main);
    }

    /* Hero 首屏 (无图设计，薄荷绿科技几何) */
    .hero-section {
      background: linear-gradient(135deg, #ecfdf5 0%, #f0fdf4 50%, #ffffff 100%);
      padding: 80px 0 60px 0;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-section::before {
      content: "";
      position: absolute;
      top: -100px;
      right: -100px;
      width: 450px;
      height: 450px;
      background: radial-gradient(circle, rgba(16, 185, 129, 0.12) 0%, rgba(255,255,255,0) 70%);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero-content {
      text-align: center;
      max-width: 880px;
      margin: 0 auto;
    }

    .hero-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid #bbf7d0;
      color: var(--mint-accent);
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: 0 2px 6px rgba(16, 185, 129, 0.06);
    }

    .hero-title {
      font-size: 2.5rem;
      font-weight: 800;
      color: #0f172a;
      line-height: 1.25;
      margin-bottom: 20px;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 35px;
    }

    .hero-buttons {
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 45px;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .metric-card {
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 18px 12px;
      box-shadow: var(--shadow-sm);
    }

    .metric-val {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--mint-accent);
      line-height: 1.2;
    }

    .metric-lbl {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 平台聚合标签云 */
    .model-tags-box {
      margin-top: 35px;
      padding: 20px;
      background: #ffffff;
      border: 1px dashed #86efac;
      border-radius: var(--radius-md);
    }

    .model-tags-title {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--mint-accent);
      margin-bottom: 12px;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }

    .model-tag {
      background: var(--primary-soft);
      border: 1px solid #d1fae5;
      color: var(--text-main);
      font-size: 0.8rem;
      padding: 4px 10px;
      border-radius: 6px;
      font-weight: 500;
    }

    /* 关于我们 / 平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-text h3 {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .about-text p {
      color: var(--text-muted);
      margin-bottom: 16px;
      font-size: 0.98rem;
    }

    .about-points {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-top: 20px;
    }

    .about-point-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--mint-accent);
      background: var(--primary-soft);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--primary-light);
    }

    .img-box-styled {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      background: #ffffff;
    }

    /* AIGC 服务矩阵 / 卡片网格 */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .cards-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }

    .card-icon-pill {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: var(--primary-soft);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 16px;
      border: 1px solid var(--primary-light);
    }

    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 流程步骤 */
    .steps-container {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #ffffff;
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 14px auto;
    }

    .step-name {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-detail {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 对比评测专属样式 */
    .eval-highlight-box {
      background: #ffffff;
      border: 2px solid var(--primary);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-md);
      margin-bottom: 30px;
    }

    .eval-score-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
      margin-bottom: 24px;
    }

    .score-badge {
      display: inline-flex;
      align-items: baseline;
      gap: 6px;
    }

    .score-num {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--primary-dark);
      line-height: 1;
    }

    .score-max {
      font-size: 1.1rem;
      color: var(--text-light);
      font-weight: 600;
    }

    .star-rate {
      color: #f59e0b;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }

    .eval-table-wrap {
      overflow-x: auto;
    }

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

    .eval-table th,
    .eval-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-color);
    }

    .eval-table th {
      background-color: var(--primary-soft);
      color: var(--mint-accent);
      font-weight: 700;
    }

    .eval-table tr:hover td {
      background-color: #fafbfc;
    }

    .col-highlight {
      background-color: #f0fdf4;
      font-weight: 600;
      color: var(--mint-accent);
    }

    /* 价格 / Token 比价 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .pricing-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px 24px;
      text-align: center;
      display: flex;
      flex-direction: column;
      position: relative;
    }

    .pricing-card.featured {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-lg);
    }

    .pricing-badge {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #ffffff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 14px;
      border-radius: 20px;
    }

    .pricing-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .pricing-price {
      font-size: 2rem;
      font-weight: 800;
      color: var(--mint-accent);
      margin: 15px 0;
    }

    .pricing-price span {
      font-size: 0.9rem;
      color: var(--text-light);
      font-weight: 400;
    }

    .pricing-features {
      list-style: none;
      text-align: left;
      margin: 20px 0;
      flex-grow: 1;
    }

    .pricing-features li {
      padding: 8px 0;
      font-size: 0.9rem;
      color: var(--text-muted);
      border-bottom: 1px dashed var(--border-color);
    }

    /* 客户评价网格 */
    .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-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

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

    .user-avatar-tag {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--mint-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .user-meta-name {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--text-main);
    }

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

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

    /* FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 16px 20px;
      font-weight: 600;
      font-size: 1rem;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      user-select: none;
    }

    .faq-question:hover {
      background: var(--primary-soft);
    }

    .faq-icon {
      font-weight: 700;
      color: var(--primary);
      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;
      background: #fafcfb;
    }

    .faq-answer p {
      padding: 16px 20px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      border-top: 1px solid var(--border-color);
    }

    .faq-item.active .faq-answer {
      max-height: 220px;
    }

    /* 表单与需求匹配 */
    .form-box-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
      max-width: 820px;
      margin: 0 auto;
    }

    .app-form {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    .form-group.full-width {
      grid-column: span 2;
    }

    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      background-color: #fdfdfd;
    }

    .form-control:focus {
      border-color: var(--border-focus);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
      background-color: #ffffff;
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* 文章与资讯 */
    .articles-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 24px;
    }

    .articles-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 12px;
    }

    .art-link-chip {
      background: var(--primary-soft);
      border: 1px solid var(--primary-light);
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.88rem;
      color: var(--mint-accent);
      font-weight: 500;
    }

    .art-link-chip:hover {
      background: var(--primary-light);
    }

    /* 加盟代理板块 */
    .partner-banner {
      background: linear-gradient(135deg, #065f46 0%, #047857 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 30px;
      align-items: center;
    }

    .partner-banner h3 {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: #ffffff;
    }

    .partner-banner p {
      font-size: 0.95rem;
      color: #e2e8f0;
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .partner-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .partner-item {
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 12px;
      border-radius: var(--radius-sm);
      font-size: 0.88rem;
      font-weight: 600;
    }

    /* 联系我们与客服二维码 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 30px;
      align-items: center;
    }

    .contact-info-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 16px;
    }

    .contact-lbl {
      font-size: 0.8rem;
      color: var(--text-light);
      margin-bottom: 4px;
    }

    .contact-val {
      font-size: 0.98rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .kefu-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
    }

    .kefu-box img {
      max-width: 140px;
      margin: 0 auto 12px auto;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    /* 友情链接 */
    .friendly-links-section {
      padding: 24px 0;
      background-color: #f1f5f9;
      border-top: 1px solid var(--border-color);
    }

    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.88rem;
    }

    .friend-links-title {
      font-weight: 700;
      color: var(--text-main);
    }

    .friend-links-flex a {
      color: var(--text-muted);
      background: #ffffff;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid var(--border-color);
    }

    .friend-links-flex a:hover {
      color: var(--primary-dark);
      border-color: var(--primary);
    }

    /* 页脚 */
    .site-footer {
      background-color: #0f172a;
      color: #cbd5e1;
      padding: 45px 0 25px 0;
      font-size: 0.9rem;
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 30px;
      padding-bottom: 30px;
      border-bottom: 1px solid #334155;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.2rem;
      margin-bottom: 10px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 0.95rem;
      margin-bottom: 12px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 8px;
    }

    .footer-links li a {
      color: #94a3b8;
    }

    .footer-links li a:hover {
      color: #34d399;
    }

    .footer-bottom {
      text-align: center;
      color: #64748b;
      font-size: 0.82rem;
    }

    /* 悬浮客服 */
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
      cursor: pointer;
      font-size: 1.1rem;
      border: none;
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: var(--primary-dark);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2rem;
      }
      .cards-grid-3,
      .pricing-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-container {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid,
      .contact-grid,
      .partner-banner,
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        padding: 15px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .hero-title {
        font-size: 1.65rem;
      }
      .section-title {
        font-size: 1.6rem;
      }
      .cards-grid-3,
      .cards-grid-4,
      .pricing-grid,
      .reviews-grid,
      .steps-container {
        grid-template-columns: 1fr;
      }
      .app-form {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .about-points,
      .contact-info-list {
        grid-template-columns: 1fr;
      }
    }