:root {
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --color-primary: #ff4d4f;
      --color-primary-hover: #e0383a;
      --color-secondary: #2563eb;
      --color-secondary-hover: #1d4ed8;
      --color-accent-yellow: #ffd600;
      --color-accent-cyan: #06b6d4;
      --color-accent-green: #10b981;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --border-bold: #0f172a;
      --shadow-block: 4px 4px 0px #0f172a;
      --shadow-block-hover: 6px 6px 0px #0f172a;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background-color: var(--bg-page);
      color: var(--text-main);
      min-width: 320px;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.2s ease;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: #ffffff;
      border-bottom: 2px solid var(--border-bold);
      box-shadow: 0 2px 0 rgba(15, 23, 42, 0.05);
    }

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

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

    .brand-logo-wrap img {
      max-height: 42px;
      width: auto;
      object-fit: contain;
    }

    .brand-title-badge {
      background: var(--color-accent-yellow);
      color: var(--text-main);
      font-weight: 900;
      font-size: 14px;
      padding: 2px 8px;
      border-radius: 4px;
      border: 1.5px solid var(--border-bold);
      letter-spacing: 0.5px;
    }

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

    .nav-links li a {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: background-color 0.2s ease, color 0.2s ease;
    }

    .nav-links li a:hover {
      background: #eff6ff;
      color: var(--color-secondary);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn-nav-primary {
      background: var(--color-primary);
      color: #ffffff !important;
      font-weight: 700;
      font-size: 14px;
      padding: 8px 18px;
      border-radius: var(--radius-sm);
      border: 2px solid var(--border-bold);
      box-shadow: 2px 2px 0px var(--border-bold);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-nav-primary:hover {
      transform: translate(-1px, -1px);
      box-shadow: 3px 3px 0px var(--border-bold);
    }

    .menu-toggle-btn {
      display: none;
      background: #f1f5f9;
      border: 2px solid var(--border-bold);
      padding: 6px 10px;
      border-radius: 6px;
      cursor: pointer;
      font-weight: bold;
    }

    /* 通用板块与排版 */
    section {
      padding: 64px 0;
      position: relative;
    }

    .section-head {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 800;
      text-transform: uppercase;
      padding: 4px 14px;
      border-radius: 999px;
      border: 2px solid var(--border-bold);
      background: var(--color-accent-yellow);
      color: var(--text-main);
      margin-bottom: 12px;
      box-shadow: 2px 2px 0px var(--border-bold);
    }

    .section-title {
      font-size: 32px;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 醒目撞色卡片通用 */
    .block-card {
      background: var(--bg-card);
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-block);
      padding: 24px;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .block-card:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-block-hover);
    }

    /* Hero 首屏 (无图片) */
    .hero-section {
      background: linear-gradient(135deg, #fffbeb 0%, #eff6ff 50%, #fdf2f8 100%);
      border-bottom: 2px solid var(--border-bold);
      padding: 70px 0 80px 0;
      text-align: center;
    }

    .hero-pill-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 2px solid var(--border-bold);
      padding: 6px 18px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 24px;
      box-shadow: 2px 2px 0px var(--border-bold);
    }

    .hero-pill-badge span.pulse-dot {
      width: 10px;
      height: 10px;
      background: var(--color-accent-green);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.4);
    }

    .hero-h1 {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-h1 .highlight-text {
      background: linear-gradient(180deg, transparent 65%, var(--color-accent-yellow) 65%);
      padding: 0 6px;
      display: inline-block;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }

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

    .btn-main-cta {
      background: var(--color-primary);
      color: #ffffff;
      font-size: 17px;
      font-weight: 800;
      padding: 14px 34px;
      border-radius: var(--radius-md);
      border: 2px solid var(--border-bold);
      box-shadow: 4px 4px 0px var(--border-bold);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-main-cta:hover {
      background: var(--color-primary-hover);
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0px var(--border-bold);
    }

    .btn-sub-cta {
      background: #ffffff;
      color: var(--text-main);
      font-size: 17px;
      font-weight: 800;
      padding: 14px 28px;
      border-radius: var(--radius-md);
      border: 2px solid var(--border-bold);
      box-shadow: 4px 4px 0px var(--border-bold);
    }

    .btn-sub-cta:hover {
      background: #f8fafc;
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0px var(--border-bold);
    }

    .hero-feature-chips {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
      max-width: 960px;
      margin: 0 auto;
    }

    .chip-item {
      background: #ffffff;
      border: 2px solid var(--border-bold);
      padding: 8px 16px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 6px;
      box-shadow: 2px 2px 0px var(--border-bold);
    }

    /* 平台核心能力介绍 */
    .grid-intro-features {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 24px;
    }

    .intro-feature-card {
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-md);
      padding: 24px;
      background: #ffffff;
      box-shadow: var(--shadow-block);
      transition: all 0.2s ease;
    }

    .intro-feature-card:nth-child(1) { border-top: 6px solid var(--color-primary); }
    .intro-feature-card:nth-child(2) { border-top: 6px solid var(--color-secondary); }
    .intro-feature-card:nth-child(3) { border-top: 6px solid var(--color-accent-green); }
    .intro-feature-card:nth-child(4) { border-top: 6px solid var(--color-accent-yellow); }

    .intro-feature-card h3 {
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .intro-feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模型矩阵徽章云 */
    .model-tag-wall {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-badge {
      background: #ffffff;
      border: 1.5px solid var(--border-bold);
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 700;
      border-radius: 6px;
      color: var(--text-main);
      box-shadow: 2px 2px 0px rgba(15, 23, 42, 0.15);
    }

    /* AIGC 服务场景大合集 */
    .service-matrix-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 20px;
    }

    .service-item-box {
      background: #ffffff;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: 3px 3px 0px var(--border-bold);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-item-box .tag-line {
      font-size: 12px;
      font-weight: 800;
      color: var(--color-secondary);
      margin-bottom: 6px;
      display: inline-block;
    }

    .service-item-box h3 {
      font-size: 17px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .service-item-box p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 案例展示 */
    .case-banner-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-bottom: 24px;
    }

    .case-image-card {
      background: #ffffff;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-block);
    }

    .case-image-card img {
      width: 100%;
      height: 260px;
      object-fit: cover;
      display: block;
      border-bottom: 2px solid var(--border-bold);
    }

    .case-info-inner {
      padding: 16px;
    }

    .case-info-inner h4 {
      font-size: 16px;
      font-weight: 800;
      margin-bottom: 6px;
    }

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

    .promo-full-banner {
      background: #ffffff;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-block);
    }

    .promo-full-banner img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 标准制作流程 */
    .flow-steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .step-node {
      background: #ffffff;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-md);
      padding: 24px 18px;
      box-shadow: var(--shadow-block);
      position: relative;
    }

    .step-num-badge {
      position: absolute;
      top: -14px;
      left: 18px;
      background: var(--color-primary);
      color: #ffffff;
      font-weight: 900;
      font-size: 14px;
      padding: 2px 10px;
      border-radius: 6px;
      border: 2px solid var(--border-bold);
    }

    .step-node h4 {
      font-size: 16px;
      font-weight: 800;
      margin: 8px 0 6px 0;
    }

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

    /* 对比评测 板块 */
    .eval-highlight-box {
      background: #eff6ff;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-block);
      margin-bottom: 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-item {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }

    .eval-score-num {
      font-size: 52px;
      font-weight: 900;
      color: var(--color-primary);
      line-height: 1;
    }

    .eval-score-max {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-muted);
    }

    .eval-stars {
      color: #f59e0b;
      font-size: 24px;
      letter-spacing: 2px;
    }

    .eval-table-container {
      overflow-x: auto;
      background: #ffffff;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-block);
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    .eval-table th, .eval-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
    }

    .eval-table th {
      background: #f1f5f9;
      font-weight: 800;
      color: var(--text-main);
      border-bottom: 2px solid var(--border-bold);
    }

    .eval-table td.brand-col {
      background: #fffbeb;
      font-weight: 800;
      color: var(--color-primary);
    }

    /* Token 比价 */
    .token-price-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

    .token-price-card {
      background: #ffffff;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-block);
    }

    .token-price-card .model-title {
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 12px;
      padding-bottom: 8px;
      border-bottom: 2px dashed var(--border-color);
    }

    .price-row {
      display: flex;
      justify-content: space-between;
      margin-bottom: 8px;
      font-size: 13.5px;
    }

    .price-save {
      color: var(--color-primary);
      font-weight: 800;
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-block);
    }

    .review-head {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
    }

    .review-author {
      font-weight: 800;
      font-size: 15px;
    }

    .review-role {
      font-size: 12px;
      background: #eff6ff;
      color: var(--color-secondary);
      padding: 2px 8px;
      border-radius: 4px;
      border: 1px solid var(--color-secondary);
      font-weight: 600;
    }

    .review-stars {
      color: #f59e0b;
      font-size: 13px;
      margin-bottom: 8px;
    }

    .review-content {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* FAQ 手风琴 */
    .faq-accordion-wrap {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-md);
      box-shadow: 2px 2px 0px var(--border-bold);
      overflow: hidden;
    }

    .faq-question {
      padding: 16px 20px;
      font-size: 15.5px;
      font-weight: 800;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #ffffff;
    }

    .faq-question:hover {
      background: #f8fafc;
    }

    .faq-icon {
      font-size: 18px;
      font-weight: 900;
      transition: transform 0.2s ease;
    }

    .faq-answer {
      display: none;
      padding: 0 20px 16px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      border-top: 1px dashed var(--border-color);
      margin-top: 4px;
      padding-top: 12px;
    }

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

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

    /* 需求匹配与表单 */
    .match-form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: start;
    }

    .contact-info-panel {
      background: var(--color-accent-yellow);
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-block);
    }

    .contact-info-panel h3 {
      font-size: 22px;
      font-weight: 900;
      margin-bottom: 16px;
    }

    .contact-meta-list {
      list-style: none;
      margin-bottom: 24px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 14.5px;
      font-weight: 700;
    }

    .qr-preview-box {
      background: #ffffff;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-md);
      padding: 16px;
      text-align: center;
      display: inline-block;
    }

    .qr-preview-box img {
      width: 140px;
      height: 140px;
      display: block;
      margin: 0 auto 8px auto;
      object-fit: cover;
    }

    .custom-submit-form {
      background: #ffffff;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-block);
    }

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

    .form-group label {
      display: block;
      font-size: 13.5px;
      font-weight: 800;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      font-size: 14px;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-sm);
      outline: none;
      background: #f8fafc;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      background: #ffffff;
      border-color: var(--color-secondary);
    }

    .form-submit-btn {
      width: 100%;
      padding: 14px;
      font-size: 16px;
      font-weight: 900;
      color: #ffffff;
      background: var(--color-primary);
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 3px 3px 0px var(--border-bold);
      transition: all 0.2s ease;
    }

    .form-submit-btn:hover {
      background: var(--color-primary-hover);
      transform: translate(-1px, -1px);
      box-shadow: 4px 4px 0px var(--border-bold);
    }

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

    .article-link-item {
      background: #ffffff;
      border: 1.5px solid var(--border-bold);
      border-radius: var(--radius-sm);
      padding: 10px 14px;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 6px;
      box-shadow: 2px 2px 0px rgba(15,23,42,0.1);
    }

    .article-link-item:hover {
      background: #eff6ff;
      color: var(--color-secondary);
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      padding: 16px;
      background: #ffffff;
      border: 2px solid var(--border-bold);
      border-radius: var(--radius-md);
    }

    .friend-links-wrap a {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-muted);
      padding: 4px 10px;
      background: #f1f5f9;
      border-radius: 4px;
    }

    .friend-links-wrap a:hover {
      color: var(--color-primary);
      background: #fee2e2;
    }

    /* 页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      border-top: 3px solid var(--color-primary);
      padding: 48px 0 24px 0;
      font-size: 13.5px;
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 15px;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

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

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

    .footer-bottom-bar {
      border-top: 1px solid #334155;
      padding-top: 20px;
      text-align: center;
      font-size: 12.5px;
      color: #64748b;
    }

    /* 浮动客服入口 */
    .floating-kefu-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--color-primary);
      color: #ffffff;
      border: 2px solid var(--border-bold);
      box-shadow: var(--shadow-block);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: 900;
      cursor: pointer;
      text-align: center;
    }

    .floating-btn:hover {
      transform: scale(1.06);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        border-bottom: 2px solid var(--border-bold);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle-btn {
        display: block;
      }
      .flow-steps-grid {
        grid-template-columns: 1fr 1fr;
      }
      .case-banner-wrapper {
        grid-template-columns: 1fr;
      }
      .match-form-grid {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-h1 {
        font-size: 32px;
      }
    }

    @media (max-width: 640px) {
      .flow-steps-grid {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 26px;
      }
      .section-title {
        font-size: 24px;
      }
    }