:root {
      --primary: #1245ff;
      --accent: #ff4800;
      --secondary: #00d084;
      --yellow: #ffd600;
      --bg: #f8fafc;
      --surface: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #0f172a;
      --shadow-solid: 4px 4px 0px #0f172a;
      --shadow-hover: 7px 7px 0px #0f172a;
      --max-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, sans-serif;
      background-color: var(--bg);
      color: var(--text-main);
    }

    body {
      overflow-x: hidden;
      line-height: 1.6;
      background: radial-gradient(circle at 10% 10%, rgba(18, 69, 255, 0.04), transparent 40%),
                  radial-gradient(circle at 90% 90%, rgba(255, 72, 0, 0.04), transparent 40%),
                  #f8fafc;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    .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: #ffffff;
      border-bottom: 3px solid var(--border-color);
    }

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

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

    .brand-box img {
      max-height: 42px;
      width: auto;
      display: block;
    }

    .brand-name {
      font-size: 1.35rem;
      font-weight: 900;
      letter-spacing: -0.5px;
      color: var(--text-main);
    }

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

    .nav-links a {
      display: inline-block;
      padding: 10px 14px;
      font-weight: 700;
      font-size: 0.95rem;
      transition: color 0.2s, background-color 0.2s;
    }

    .nav-links a:hover {
      color: var(--primary);
      background: #eef2ff;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.95rem;
      font-weight: 800;
      border: 2px solid var(--border-color);
      box-shadow: 3px 3px 0px var(--border-color);
      cursor: pointer;
      transition: transform 0.15s ease, box-shadow 0.15s ease;
      white-space: nowrap;
      text-align: center;
    }

    .btn:hover {
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0px var(--border-color);
    }

    .btn:active {
      transform: translate(1px, 1px);
      box-shadow: 1px 1px 0px var(--border-color);
    }

    .btn-primary {
      background: var(--primary);
      color: #ffffff;
    }

    .btn-accent {
      background: var(--accent);
      color: #ffffff;
    }

    .btn-yellow {
      background: var(--yellow);
      color: var(--text-main);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 2px solid var(--border-color);
      padding: 6px 10px;
      font-size: 1.2rem;
      cursor: pointer;
    }

    /* 首屏 Hero (无图，纯CSS与排版) */
    .hero-section {
      padding: 70px 0 50px;
      position: relative;
      background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
      border-bottom: 3px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge {
      display: inline-block;
      background: var(--yellow);
      border: 2px solid var(--border-color);
      box-shadow: 2px 2px 0px var(--border-color);
      font-size: 0.85rem;
      font-weight: 900;
      padding: 4px 12px;
      margin-bottom: 20px;
      text-transform: uppercase;
    }

    .hero-title {
      font-size: 2.7rem;
      line-height: 1.25;
      font-weight: 900;
      letter-spacing: -1px;
      margin-bottom: 20px;
      color: var(--text-main);
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 30px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 30px;
    }

    .hero-actions .btn {
      font-size: 1.05rem;
      padding: 14px 28px;
    }

    .hero-features {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .hero-features span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .hero-features span::before {
      content: "✓";
      color: var(--secondary);
      font-weight: 900;
    }

    .hero-status-card {
      background: #ffffff;
      border: 3px solid var(--border-color);
      box-shadow: var(--shadow-solid);
      padding: 24px;
      position: relative;
    }

    .status-header {
      display: flex;
      justify-content: space-between;
      border-bottom: 2px solid #e2e8f0;
      padding-bottom: 12px;
      margin-bottom: 16px;
      font-weight: 800;
      font-size: 0.95rem;
    }

    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #15803d;
    }

    .status-indicator::before {
      content: "";
      width: 8px;
      height: 8px;
      background: #22c55e;
      border-radius: 50%;
      display: inline-block;
    }

    .status-row {
      display: flex;
      justify-content: space-between;
      padding: 8px 0;
      font-size: 0.9rem;
      border-bottom: 1px dashed #cbd5e1;
    }

    .status-row:last-child {
      border-bottom: none;
    }

    .status-key {
      color: var(--text-muted);
      font-weight: 600;
    }

    .status-val {
      font-weight: 800;
      color: var(--primary);
    }

    /* 模块通用样式 */
    .section {
      padding: 60px 0;
      border-bottom: 3px solid var(--border-color);
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 40px;
    }

    .section-tag {
      display: inline-block;
      background: #e2e8f0;
      border: 2px solid var(--border-color);
      font-size: 0.8rem;
      font-weight: 800;
      padding: 3px 10px;
      margin-bottom: 12px;
      box-shadow: 2px 2px 0px var(--border-color);
    }

    .section-title {
      font-size: 2rem;
      font-weight: 900;
      margin-bottom: 12px;
    }

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

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

    .metric-card {
      background: #ffffff;
      border: 3px solid var(--border-color);
      box-shadow: var(--shadow-solid);
      padding: 24px;
      text-align: center;
      transition: transform 0.2s ease;
    }

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

    .metric-num {
      font-size: 2.4rem;
      font-weight: 900;
      color: var(--accent);
      line-height: 1;
      margin-bottom: 8px;
    }

    .metric-label {
      font-weight: 800;
      font-size: 1rem;
      margin-bottom: 4px;
    }

    .metric-sub {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 服务能力与场景矩阵 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 20px;
    }

    .scene-card {
      background: #ffffff;
      border: 2px solid var(--border-color);
      box-shadow: 3px 3px 0px var(--border-color);
      padding: 20px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .scene-card:hover {
      transform: translateY(-3px);
      box-shadow: 5px 5px 0px var(--border-color);
    }

    .scene-title {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .scene-title::before {
      content: "";
      width: 10px;
      height: 10px;
      background: var(--accent);
      border: 1px solid var(--border-color);
      display: inline-block;
    }

    .scene-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
      margin-bottom: 16px;
    }

    .scene-tag-box {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .scene-tag {
      font-size: 0.75rem;
      font-weight: 700;
      background: #f1f5f9;
      border: 1px solid var(--border-color);
      padding: 2px 6px;
    }

    /* 模型支持标签云 */
    .tags-box {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-chip {
      background: #ffffff;
      border: 2px solid var(--border-color);
      box-shadow: 2px 2px 0px var(--border-color);
      padding: 6px 14px;
      font-size: 0.85rem;
      font-weight: 800;
      display: inline-block;
      transition: background-color 0.2s;
    }

    .model-chip:hover {
      background: var(--yellow);
    }

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

    .step-item {
      background: #ffffff;
      border: 3px solid var(--border-color);
      box-shadow: var(--shadow-solid);
      padding: 24px;
      position: relative;
    }

    .step-badge {
      position: absolute;
      top: -14px;
      left: 20px;
      background: var(--primary);
      color: #ffffff;
      font-weight: 900;
      padding: 2px 10px;
      border: 2px solid var(--border-color);
      font-size: 0.85rem;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 800;
      margin: 10px 0 8px;
    }

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

    /* 对比评测表格 */
    .comparison-section {
      background: #ffffff;
    }

    .rating-banner {
      background: #fef08a;
      border: 3px solid var(--border-color);
      box-shadow: var(--shadow-solid);
      padding: 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 30px;
    }

    .rating-score {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--accent);
    }

    .rating-meta {
      font-size: 1.05rem;
      font-weight: 800;
    }

    .table-container {
      overflow-x: auto;
      border: 3px solid var(--border-color);
      box-shadow: var(--shadow-solid);
      background: #ffffff;
    }

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

    .table-custom th,
    .table-custom td {
      padding: 16px 20px;
      border: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .table-custom th {
      background: #f8fafc;
      font-weight: 900;
    }

    .table-custom tr:nth-child(even) {
      background: #fdfdfd;
    }

    .col-highlight {
      background: #ecfeff !important;
      font-weight: 800;
    }

    /* 案例展示区（含素材图） */
    .media-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .media-card {
      background: #ffffff;
      border: 3px solid var(--border-color);
      box-shadow: var(--shadow-solid);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .media-card-img-wrapper {
      position: relative;
      background: #0f172a;
      aspect-ratio: 16/9;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .media-card-img-wrapper.square {
      aspect-ratio: 1/1;
    }

    .media-card-img-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .media-card-body {
      padding: 20px;
      flex-grow: 1;
    }

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

    .media-card-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      border: 3px solid var(--border-color);
      box-shadow: var(--shadow-solid);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.95rem;
      line-height: 1.6;
      margin-bottom: 20px;
      position: relative;
    }

    .review-author {
      border-top: 2px dashed #cbd5e1;
      padding-top: 14px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .author-name {
      font-weight: 800;
      font-size: 0.95rem;
    }

    .author-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 手风琴 */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 2px solid var(--border-color);
      box-shadow: 3px 3px 0px var(--border-color);
    }

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

    .faq-question::after {
      content: "+";
      font-size: 1.3rem;
      font-weight: 900;
      transition: transform 0.2s;
    }

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

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      border-top: 1px solid #f1f5f9;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* 表单与联系区 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .form-box {
      background: #ffffff;
      border: 3px solid var(--border-color);
      box-shadow: var(--shadow-solid);
      padding: 30px;
    }

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

    .form-group label {
      display: block;
      font-weight: 800;
      font-size: 0.9rem;
      margin-bottom: 6px;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 14px;
      font-size: 0.95rem;
      border: 2px solid var(--border-color);
      background: #f8fafc;
      font-family: inherit;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      outline: none;
      background: #ffffff;
      border-color: var(--primary);
    }

    .contact-info-card {
      background: #fef9c3;
      border: 3px solid var(--border-color);
      box-shadow: var(--shadow-solid);
      padding: 30px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-list {
      list-style: none;
      margin-bottom: 24px;
    }

    .contact-list li {
      padding: 10px 0;
      border-bottom: 1px dashed var(--border-color);
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 0.95rem;
    }

    .qr-container {
      background: #ffffff;
      border: 2px solid var(--border-color);
      padding: 14px;
      width: 160px;
      margin: 0 auto;
      text-align: center;
    }

    .qr-container img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 资讯与友情链接 */
    .article-list {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 12px;
      margin-bottom: 24px;
    }

    .article-item {
      background: #ffffff;
      border: 2px solid var(--border-color);
      padding: 10px 14px;
      font-size: 0.9rem;
      font-weight: 700;
      box-shadow: 2px 2px 0px var(--border-color);
      transition: background-color 0.2s;
    }

    .article-item:hover {
      background: #eef2ff;
    }

    .links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 16px;
      border-top: 2px solid var(--border-color);
    }

    .links-box a {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-muted);
      border: 1px solid #cbd5e1;
      padding: 4px 10px;
      background: #ffffff;
    }

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

    /* 页脚规范 */
    .site-footer {
      background: #0f172a;
      color: #f8fafc;
      padding: 40px 0 24px;
      border-top: 4px solid var(--accent);
    }

    .footer-inner {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 1px solid #334155;
    }

    .footer-brand {
      font-size: 1.2rem;
      font-weight: 900;
    }

    .footer-copy {
      text-align: center;
      font-size: 0.85rem;
      color: #94a3b8;
      padding-top: 20px;
    }

    /* 悬浮客服面板 */
    .fixed-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--yellow);
      border: 2px solid var(--border-color);
      box-shadow: 4px 4px 0px var(--border-color);
      padding: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      width: 100px;
      text-align: center;
      font-size: 0.75rem;
      font-weight: 800;
    }

    .fixed-kefu img {
      width: 76px;
      height: 76px;
      border: 1px solid var(--border-color);
    }

    /* 移动端响应式 */
    @media (max-width: 992px) {
      .hero-grid,
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .metric-grid,
      .process-steps,
      .media-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 3px solid var(--border-color);
        padding: 16px;
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 2rem;
      }
      .metric-grid,
      .process-steps,
      .media-grid,
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .header-inner {
        height: 60px;
      }
      .brand-name {
        font-size: 1.1rem;
      }
      .fixed-kefu {
        right: 10px;
        bottom: 10px;
        transform: scale(0.9);
      }
    }