:root {
      --primary: #ff5722;
      --primary-hover: #f4511e;
      --accent: #2979ff;
      --accent-hover: #1565c0;
      --bg-light: #fafbff;
      --surface: #ffffff;
      --surface-sub: #f3f6fc;
      --text-dark: #1a202c;
      --text-muted: #5a6a85;
      --border-color: #e2e8f0;
      --brand-gradient: linear-gradient(135deg, #ff5722 0%, #ff1744 50%, #2979ff 100%);
      --shadow-sm: 0 4px 12px rgba(255, 87, 34, 0.08);
      --shadow-md: 0 10px 30px rgba(41, 121, 255, 0.12);
      --shadow-hover: 0 16px 40px rgba(255, 87, 34, 0.18);
      --radius: 12px;
      --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-light);
      color: var(--text-dark);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: radial-gradient(circle at 10% 20%, rgba(255, 87, 34, 0.04) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(41, 121, 255, 0.04) 0%, transparent 40%),
                  var(--bg-light);
    }

    .container {
      width: 100%;
      max-width: var(--max-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, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

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

    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-logo-wrap .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-name {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -0.5px;
    }

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

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

    .nav-links li a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      padding: 8px 12px;
      border-radius: 6px;
      transition: all 0.25s ease;
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(255, 87, 34, 0.08);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 8px;
      text-decoration: none;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
    }

    .btn-primary {
      background: var(--primary);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(255, 87, 34, 0.35);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 87, 34, 0.45);
    }

    .btn-accent {
      background: var(--accent);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(41, 121, 255, 0.35);
    }

    .btn-accent:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(41, 121, 255, 0.45);
    }

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

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(255, 87, 34, 0.04);
    }

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

    .mobile-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-dark);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 区域统一结构 */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .badge-pill {
      display: inline-block;
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      background: rgba(255, 87, 34, 0.1);
      border-radius: 50px;
      margin-bottom: 14px;
      border: 1px solid rgba(255, 87, 34, 0.2);
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-dark);
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Hero 首屏 (无图片) */
    .hero-section {
      padding: 90px 0 70px 0;
      background: linear-gradient(180deg, #ffffff 0%, var(--surface-sub) 100%);
      border-bottom: 1px solid var(--border-color);
    }

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

    .hero-content h1 {
      font-size: 40px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-dark);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-content .highlight {
      color: var(--primary);
      position: relative;
      display: inline-block;
    }

    .hero-content p {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 32px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 40px;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
    }

    .metric-item .val {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary);
      display: block;
    }

    .metric-item .lbl {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    .hero-visual-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-md);
      position: relative;
    }

    .model-terminal {
      background: #0f172a;
      border-radius: 8px;
      padding: 20px;
      color: #38bdf8;
      font-family: monospace;
      font-size: 13px;
      line-height: 1.7;
    }

    .model-terminal .status-dot {
      width: 10px;
      height: 10px;
      background: #22c55e;
      border-radius: 50%;
      display: inline-block;
      margin-right: 8px;
    }

    .engine-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 20px;
    }

    .engine-tag {
      font-size: 12px;
      font-weight: 600;
      padding: 6px 12px;
      background: var(--surface-sub);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      color: var(--text-dark);
    }

    /* 关于我们与平台介绍 */
    .about-card-wrap {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-sm);
    }

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

    .card-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 10px;
      background: rgba(255, 87, 34, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
      font-weight: bold;
    }

    .info-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-dark);
    }

    .info-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* AIGC服务 / 一站式制作网格 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .scene-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      transition: all 0.25s ease;
    }

    .scene-item:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .scene-tag {
      font-size: 12px;
      color: var(--accent);
      font-weight: 700;
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .scene-item h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-dark);
    }

    .scene-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 案例中心图文展示 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .case-img-container {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      overflow: hidden;
    }

    .case-img-container.square {
      aspect-ratio: 1 / 1;
    }

    .case-img-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .case-card:hover .case-img-container img {
      transform: scale(1.04);
    }

    .case-info {
      padding: 20px;
    }

    .case-info h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-dark);
    }

    .case-info p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测板块 */
    .evaluation-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
      margin-bottom: 40px;
    }

    .eval-score-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--border-color);
      margin-bottom: 28px;
    }

    .eval-score-box {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-number {
      font-size: 48px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .score-stars {
      color: #ffb300;
      font-size: 20px;
    }

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

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

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .eval-table th {
      background: var(--surface-sub);
      color: var(--text-dark);
      font-weight: 700;
    }

    .eval-table .highlight-col {
      background: rgba(255, 87, 34, 0.04);
      color: var(--primary);
      font-weight: 700;
    }

    /* 标准流程时间线 */
    .step-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 14px;
      margin-bottom: 16px;
    }

    .step-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-dark);
    }

    .step-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 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);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

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

    .avatar-char {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(41, 121, 255, 0.1);
      color: var(--accent);
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
    }

    .user-meta h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-dark);
    }

    .user-meta span {
      font-size: 12px;
      color: var(--text-muted);
    }

    .review-text {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
      transition: all 0.25s ease;
    }

    .faq-item:hover {
      border-color: var(--primary);
    }

    .faq-question {
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 600;
      font-size: 15px;
      color: var(--text-dark);
      background: #ffffff;
    }

    .faq-question::after {
      content: '+';
      font-size: 20px;
      color: var(--primary);
      font-weight: 700;
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      display: none;
      padding: 0 24px 18px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
      display: block;
      border-top: 1px solid var(--surface-sub);
    }

    /* 需求表单与联系我们 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .form-box form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-dark);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      background: var(--bg-light);
      color: var(--text-dark);
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
    }

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

    .contact-meta-item {
      margin-bottom: 20px;
    }

    .contact-meta-item strong {
      display: block;
      font-size: 14px;
      color: var(--text-dark);
      margin-bottom: 4px;
    }

    .contact-meta-item span {
      font-size: 14px;
      color: var(--text-muted);
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 20px;
      background: var(--surface-sub);
      padding: 16px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    .qr-container img {
      width: 100px;
      height: 100px;
      object-fit: cover;
      border-radius: 6px;
    }

    .qr-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 最新文章模块 */
    .article-list-wrap {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-item {
      background: #ffffff;
      padding: 20px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-item h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-dark);
    }

    .article-item a {
      color: var(--accent);
      text-decoration: none;
      font-size: 13px;
      font-weight: 600;
      margin-top: 14px;
      display: inline-block;
    }

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

    /* 底部通用规范 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px 0;
      color: var(--text-muted);
      font-size: 13px;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 16px;
    }

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

    .footer-links-list a {
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s ease;
    }

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

    .friendly-links {
      border-top: 1px solid var(--border-color);
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friendly-links span {
      font-weight: 700;
      color: var(--text-dark);
    }

    .friendly-links a {
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s ease;
    }

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

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

    /* 悬浮客服面板 */
    .floating-service {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-hover);
      cursor: pointer;
      text-decoration: none;
      transition: transform 0.2s ease;
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    .float-qr-card {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 14px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: none;
      text-align: center;
      width: 140px;
    }

    .float-qr-card img {
      width: 110px;
      height: 110px;
      object-fit: cover;
      margin-bottom: 6px;
    }

    .float-qr-card span {
      font-size: 11px;
      color: var(--text-dark);
      font-weight: 600;
      display: block;
    }

    .floating-service:hover .float-qr-card {
      display: block;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .about-card-wrap,
      .case-grid,
      .reviews-grid,
      .article-list-wrap {
        grid-template-columns: repeat(2, 1fr);
      }
      .scene-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-menu.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 14px;
      }
      .mobile-toggle {
        display: block;
      }
    }

    @media (max-width: 640px) {
      .about-card-wrap,
      .case-grid,
      .reviews-grid,
      .article-list-wrap,
      .scene-grid,
      .step-timeline {
        grid-template-columns: 1fr;
      }
      .hero-content h1 {
        font-size: 30px;
      }
      .section-title {
        font-size: 26px;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .hero-metrics {
        grid-template-columns: 1fr;
      }
    }