:root {
      --primary: #0ea879;
      --primary-hover: #0b8a63;
      --primary-light: #e6f7f0;
      --mint-bg: #f3faf6;
      --mint-border: #c8edd9;
      --text-main: #192a24;
      --text-muted: #52665e;
      --card-bg: #ffffff;
      --container-max: 1200px;
      --radius: 12px;
      --transition: all 0.28s ease;
      --shadow: 0 4px 20px rgba(14, 168, 121, 0.08);
      --shadow-hover: 0 10px 30px rgba(14, 168, 121, 0.16);
    }

    * {
      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(--mint-bg);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

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

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--mint-border);
    }

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

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

    .brand-box .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

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

    .nav-links a {
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 6px;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      text-align: center;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff !important;
      box-shadow: 0 4px 12px rgba(14, 168, 121, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(14, 168, 121, 0.35);
    }

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

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

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .mobile-menu-btn svg {
      width: 28px;
      height: 28px;
      stroke: var(--text-main);
    }

    /* 区域共用 */
    .section-spacing {
      padding: 68px 0;
    }

    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 30px;
      margin-bottom: 12px;
      border: 1px solid var(--mint-border);
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.3;
    }

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

    /* Hero 首屏 */
    .hero-section {
      background: radial-gradient(circle at 50% 10%, #e0f6ec 0%, #f3faf6 70%);
      padding: 72px 0 64px;
      border-bottom: 1px solid var(--mint-border);
    }

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

    .hero-h1 {
      font-size: 2.5rem;
      font-weight: 900;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      line-height: 1.25;
    }

    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 44px;
    }

    .btn-hero-official {
      background-color: var(--primary);
      color: #ffffff;
      font-size: 1.1rem;
      padding: 14px 34px;
      border-radius: 30px;
      box-shadow: 0 8px 24px rgba(14, 168, 121, 0.35);
      border: 2px solid #ffffff;
    }

    .btn-hero-official:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
    }

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

    .stat-card {
      background: #ffffff;
      padding: 20px 14px;
      border-radius: var(--radius);
      border: 1px solid var(--mint-border);
      box-shadow: var(--shadow);
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }

    .stat-val {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 平台矩阵 */
    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-badge {
      background: #ffffff;
      padding: 6px 14px;
      border-radius: 20px;
      border: 1px solid var(--mint-border);
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-muted);
      transition: var(--transition);
    }

    .model-badge:hover {
      background: var(--primary-light);
      color: var(--primary);
      border-color: var(--primary);
    }

    /* 核心服务网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .service-card {
      background: var(--card-bg);
      padding: 28px 24px;
      border-radius: var(--radius);
      border: 1px solid var(--mint-border);
      box-shadow: var(--shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      color: var(--primary);
    }

    .card-icon svg {
      width: 26px;
      height: 26px;
    }

    .service-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .card-meta {
      font-size: 0.85rem;
      color: var(--primary);
      font-weight: 600;
    }

    /* 横版与素材展示区域 */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-top: 24px;
    }

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

    .img-box img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .img-box:hover img {
      transform: scale(1.02);
    }

    .img-caption {
      padding: 14px 18px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
    }

    /* 对比评测板块 */
    .eval-highlight {
      background: #ffffff;
      border: 2px solid var(--primary);
      border-radius: var(--radius);
      padding: 24px 32px;
      margin-bottom: 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow);
    }

    .eval-stars {
      color: #f59e0b;
      font-size: 1.4rem;
      margin-right: 8px;
    }

    .score-box {
      text-align: right;
    }

    .score-box .num {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary);
    }

    .table-container {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--mint-border);
      box-shadow: var(--shadow);
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #ebf5ee;
      font-size: 0.95rem;
    }

    .eval-table th {
      background-color: var(--primary-light);
      font-weight: 700;
      color: var(--text-main);
    }

    .eval-table tr:last-child td {
      border-bottom: none;
    }

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

    .text-green {
      color: var(--primary);
      font-weight: 700;
    }

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

    .step-item {
      background: #ffffff;
      padding: 24px 20px;
      border-radius: var(--radius);
      border: 1px solid var(--mint-border);
      position: relative;
      box-shadow: var(--shadow);
    }

    .step-num {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--mint-border);
      margin-bottom: 10px;
      line-height: 1;
    }

    .step-item h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
      color: var(--text-main);
    }

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

    /* 客户评价网格 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .review-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--mint-border);
      box-shadow: var(--shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-content {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.65;
      margin-bottom: 18px;
      font-style: normal;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
    }

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

    .reviewer-meta h5 {
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .reviewer-meta span {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 表单与联系区 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 32px;
      background: #ffffff;
      padding: 36px;
      border-radius: var(--radius);
      border: 1px solid var(--mint-border);
      box-shadow: var(--shadow);
    }

    .contact-info-side {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .info-item {
      margin-bottom: 20px;
    }

    .info-item h4 {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 4px;
    }

    .info-item p, .info-item a {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .qr-container {
      margin-top: 14px;
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .qr-container img {
      width: 110px;
      height: 110px;
      border: 1px solid var(--mint-border);
      border-radius: 8px;
      display: block;
    }

    .qr-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #d2e8dd;
      border-radius: 8px;
      font-size: 0.95rem;
      color: var(--text-main);
      outline: none;
      background: #fafdfb;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(14, 168, 121, 0.15);
    }

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

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--mint-border);
      border-radius: 8px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 600;
      font-size: 1rem;
      color: var(--text-main);
      user-select: none;
    }

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background-color: #fbfdfc;
      padding: 0 24px;
      font-size: 0.93rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

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

    .faq-item.active .faq-answer {
      padding: 16px 24px 20px;
      max-height: 260px;
      border-top: 1px solid #edf7f2;
    }

    /* 资讯与外链板块 */
    .article-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-chip {
      background: #ffffff;
      padding: 10px 18px;
      border-radius: 8px;
      border: 1px solid var(--mint-border);
      font-size: 0.9rem;
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .article-chip:hover {
      background: var(--primary-light);
      color: var(--primary);
    }

    /* 底部通用样式 */
    .site-footer {
      background-color: #ffffff;
      border-top: 1px solid var(--mint-border);
      padding: 48px 0 24px;
      margin-top: auto;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 32px;
      margin-bottom: 36px;
    }

    .footer-col h4 {
      font-size: 1rem;
      color: var(--text-main);
      margin-bottom: 16px;
      font-weight: 700;
    }

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

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

    .footer-links a {
      color: var(--text-muted);
      font-size: 0.9rem;
    }

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

    .friendly-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .friendly-links-wrap a {
      font-size: 0.85rem;
      padding: 4px 10px;
      background: var(--mint-bg);
      border: 1px solid var(--mint-border);
      border-radius: 4px;
      color: var(--text-muted);
    }

    .friendly-links-wrap a:hover {
      background: var(--primary-light);
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid #ebf5ee;
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 浮动客服 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 80px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .kefu-trigger {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(14, 168, 121, 0.4);
      cursor: pointer;
      transition: var(--transition);
      position: relative;
    }

    .kefu-trigger:hover {
      transform: scale(1.06);
    }

    .kefu-popup {
      display: none;
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      border: 1px solid var(--mint-border);
      border-radius: 8px;
      padding: 12px;
      box-shadow: var(--shadow-hover);
      text-align: center;
      width: 140px;
    }

    .kefu-popup img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 4px;
    }

    .kefu-popup span {
      font-size: 0.78rem;
      color: var(--text-muted);
      margin-top: 6px;
      display: block;
    }

    .kefu-trigger:hover .kefu-popup {
      display: block;
    }

    .back-to-top {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--mint-border);
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: var(--shadow);
      transition: var(--transition);
      opacity: 0;
      pointer-events: none;
    }

    .back-to-top.show {
      opacity: 1;
      pointer-events: auto;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-h1 {
        font-size: 2.1rem;
      }
      .grid-3, .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4, .step-list, .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        border-bottom: 1px solid var(--mint-border);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links a {
        display: block;
        padding: 10px 0;
      }
      .grid-3, .grid-4, .review-grid, .hero-stats, .gallery-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 1.75rem;
      }
      .eval-highlight {
        flex-direction: column;
        text-align: center;
        gap: 12px;
      }
      .score-box {
        text-align: center;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
      }
    }