:root {
      --primary: #0052ff;
      --primary-hover: #0040cc;
      --accent: #ff4d00;
      --secondary: #7928ca;
      --cyan: #00dfd8;
      --bg: #f8fafc;
      --card-bg: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg);
      color: var(--text-main);
    }

    body {
      background: radial-gradient(circle at 10% 20%, rgba(0, 82, 255, 0.05) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(255, 77, 0, 0.05) 0%, transparent 40%),
                  #f8fafc;
      line-height: 1.6;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.25s ease;
    }

    .container {
      width: 100%;
      max-width: var(--container-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 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: 1px solid var(--border-color);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
    }

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

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

    .logo-box {
      width: 130px;
      height: 40px;
      display: flex;
      align-items: center;
    }

    .nav-menu {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: 6px;
      transition: all 0.2s;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(0, 82, 255, 0.06);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 8px;
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #2563eb 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(0, 82, 255, 0.3);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover) 0%, #1d4ed8 100%);
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(0, 82, 255, 0.4);
    }

    .btn-accent {
      background: linear-gradient(135deg, var(--accent) 0%, #e11d48 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(255, 77, 0, 0.3);
    }

    .btn-accent:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(255, 77, 0, 0.4);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-main);
      border-color: var(--border-color);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(0, 82, 255, 0.04);
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 模块通用标题 */
    .section {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      background: rgba(0, 82, 255, 0.08);
      border-radius: 50px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 Hero (无图片) */
    .hero-section {
      padding: 80px 0 60px 0;
      background: radial-gradient(circle at 50% 0%, rgba(0, 82, 255, 0.1) 0%, transparent 60%),
                  linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }

    .hero-h1 {
      font-size: 40px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #0f172a 0%, #0052ff 50%, #7928ca 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-p {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 840px;
      margin: 0 auto 32px auto;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .hero-btn-official {
      background: linear-gradient(135deg, #ff4d00 0%, #ff0055 100%);
      color: #ffffff;
      font-size: 17px;
      padding: 13px 32px;
      border-radius: 8px;
      box-shadow: 0 8px 24px rgba(255, 77, 0, 0.35);
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .hero-btn-official:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 30px rgba(255, 77, 0, 0.45);
    }

    .hero-features-bar {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
      background: #ffffff;
      padding: 24px;
      border-radius: 14px;
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
      border: 1px solid var(--border-color);
    }

    .feat-item {
      display: flex;
      align-items: center;
      gap: 12px;
      text-align: left;
    }

    .feat-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(0, 82, 255, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: bold;
      flex-shrink: 0;
    }

    .feat-title {
      font-weight: 700;
      font-size: 15px;
      color: var(--text-main);
    }

    .feat-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 数据指标板块 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .metric-card {
      background: #ffffff;
      padding: 28px 20px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      text-align: center;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
      transition: transform 0.25s;
    }

    .metric-card:hover {
      transform: translateY(-4px);
    }

    .metric-num {
      font-size: 34px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 平台介绍与模型生态 */
    .platform-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
      box-shadow: 0 6px 24px rgba(0, 0, 0, 0.03);
    }

    .platform-desc-p {
      font-size: 16px;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.8;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

    .tag-pill {
      background: #f1f5f9;
      color: var(--text-main);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      border: 1px solid #e2e8f0;
      transition: all 0.2s;
    }

    .tag-pill:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

    /* AIGC 服务能力卡片 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 20px;
    }

    .service-card {
      background: #ffffff;
      border-radius: 12px;
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.02);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 12px 28px rgba(0, 82, 255, 0.08);
      border-color: rgba(0, 82, 255, 0.3);
    }

    .service-badge {
      align-self: flex-start;
      font-size: 12px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      background: rgba(121, 40, 202, 0.08);
      color: var(--secondary);
      margin-bottom: 12px;
    }

    .service-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .service-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 一站式制作工作流 & 流程步骤 */
    .workflow-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .flow-step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 28px 20px;
      position: relative;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.02);
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 15px;
      margin-bottom: 16px;
    }

    .step-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测表格与卡片 */
    .eval-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
      box-shadow: 0 6px 24px rgba(0, 0, 0, 0.03);
    }

    .eval-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 24px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .eval-score-badge {
      display: flex;
      align-items: center;
      gap: 12px;
      background: rgba(255, 77, 0, 0.06);
      padding: 8px 18px;
      border-radius: 8px;
      border: 1px solid rgba(255, 77, 0, 0.2);
    }

    .eval-score-num {
      font-size: 26px;
      font-weight: 900;
      color: var(--accent);
    }

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

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

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

    .eval-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    .eval-table td:nth-child(2) {
      color: var(--primary);
      font-weight: 700;
    }

    /* 案例中心图文展示 */
    .banner-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 30px;
    }

    .case-banner-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.03);
    }

    .case-banner-item img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
    }

    .case-info {
      padding: 18px;
    }

    .case-info h4 {
      font-size: 16px;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .case-info p {
      font-size: 13px;
      color: var(--text-muted);
    }

    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .gallery-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
    }

    .gallery-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      display: block;
    }

    /* 客户评价板块 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.02);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .quote-content {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .author-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }

    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }

    .author-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 表单与需求匹配 */
    .form-wrapper {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      padding: 36px;
      box-shadow: 0 6px 24px rgba(0, 0, 0, 0.03);
      max-width: 800px;
      margin: 0 auto;
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      background: #f8fafc;
      color: var(--text-main);
      transition: all 0.2s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(0, 82, 255, 0.1);
    }

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

    /* 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(--border-color);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
    }

    .faq-question {
      padding: 18px 22px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }

    .faq-question::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--primary);
      transition: transform 0.2s;
    }

    .faq-item.active .faq-question::after {
      content: "−";
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #f8fafc;
      padding: 0 22px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.6;
    }

    .faq-item.active .faq-answer {
      padding: 16px 22px 20px 22px;
      max-height: 200px;
    }

    /* 最新文章板块 */
    .article-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      margin-top: 24px;
    }

    .article-links-box ul {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 12px;
    }

    .article-links-box a {
      color: var(--primary);
      font-size: 14px;
      font-weight: 600;
      display: inline-block;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .article-links-box a:hover {
      text-decoration: underline;
    }

    /* 友情链接与网络 */
    .friend-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }

    .friend-links-box a {
      font-size: 14px;
      color: var(--text-muted);
      padding: 4px 10px;
      background: #f1f5f9;
      border-radius: 6px;
    }

    .friend-links-box a:hover {
      background: var(--primary);
      color: #ffffff;
    }

    /* 页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 50px 0 24px 0;
      border-top: 1px solid #1e293b;
      margin-top: auto;
    }

    .footer-inner {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 16px;
    }

    .footer-col p {
      font-size: 14px;
      line-height: 1.8;
      margin-bottom: 10px;
    }

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

    .footer-col a:hover {
      color: #ffffff;
    }

    .footer-qr {
      width: 90px;
      height: 90px;
      background: #ffffff;
      padding: 4px;
      border-radius: 6px;
      display: block;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

    /* 悬浮客服面板 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
      padding: 16px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }

    .float-kefu-qr {
      width: 100px;
      height: 100px;
      margin-bottom: 8px;
    }

    .float-kefu-title {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
    }

    .float-kefu-desc {
      font-size: 11px;
      color: var(--text-muted);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .workflow-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .testimonial-grid {
        grid-template-columns: 1fr;
      }
      .footer-inner {
        grid-template-columns: 1fr 1fr;
      }
      .gallery-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-toggle {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
      }
      .nav-menu.open {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .header-actions {
        display: none;
      }
      .hero-h1 {
        font-size: 28px;
      }
      .banner-grid {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .footer-inner {
        grid-template-columns: 1fr;
      }
      .float-kefu {
        display: none;
      }
    }