:root {
      --primary: #FF4D00;
      --primary-light: #FF7A00;
      --primary-hover: #E03E00;
      --accent-cyan: #00D2BE;
      --accent-blue: #0066FF;
      --accent-yellow: #FFB800;
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-regular: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 15px -3px rgba(255, 77, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 20px 25px -5px rgba(255, 77, 0, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      background-image: 
        radial-gradient(circle at 10% 10%, rgba(255, 77, 0, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 90% 40%, rgba(0, 102, 255, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 50% 80%, rgba(0, 210, 190, 0.04) 0%, transparent 40%);
      background-attachment: fixed;
    }

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

    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 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: 2px solid #FFE4D6;
      box-shadow: 0 4px 20px rgba(255, 77, 0, 0.04);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

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

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

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

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

    .nav-links li a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-regular);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: rgba(255, 77, 0, 0.08);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
      padding: 10px 22px;
      border-radius: 50px;
      cursor: pointer;
      border: 2px solid transparent;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(255, 77, 0, 0.35);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary) 100%);
      box-shadow: 0 6px 20px rgba(255, 77, 0, 0.45);
      transform: translateY(-2px);
      color: #FFFFFF;
    }

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

    .btn-outline:hover {
      background: rgba(255, 77, 0, 0.08);
      transform: translateY(-2px);
    }

    .btn-large {
      padding: 14px 34px;
      font-size: 17px;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
      padding: 6px;
    }

    /* 区域通用标题 */
    .section-padding {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      background: #FFF1EB;
      padding: 6px 16px;
      border-radius: 30px;
      margin-bottom: 12px;
      border: 1px solid #FFE0D2;
    }

    .section-title {
      font-size: 32px;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 720px;
      margin: 0 auto;
    }

    /* 首屏 Hero (鲜亮纯代码构造，不放图片) */
    .hero-section {
      padding: 70px 0 80px 0;
      background: linear-gradient(180deg, #FFFFFF 0%, #FFF7F2 100%);
      border-bottom: 1px solid #FFE6D9;
      position: relative;
      overflow: hidden;
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FFFFFF;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 8px 20px;
      border-radius: 50px;
      font-size: 14px;
      font-weight: 800;
      margin-bottom: 24px;
      box-shadow: 0 4px 12px rgba(255, 77, 0, 0.12);
    }

    .hero-title {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      color: #0F172A;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary);
      background: linear-gradient(120deg, #FF4D00, #FF0055);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-regular);
      margin-bottom: 36px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 18px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

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

    .stat-card {
      background: #FFFFFF;
      border: 2px solid #FFE9DF;
      padding: 24px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

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

    .stat-num {
      font-size: 32px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 4px;
      font-family: Arial, sans-serif;
    }

    .stat-label {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-regular);
    }

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

    .model-tag {
      background: #FFFFFF;
      border: 1px solid #CBD5E1;
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
      box-shadow: 0 2px 5px rgba(0,0,0,0.03);
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #FFF5F0;
      transform: scale(1.05);
    }

    /* 服务与一站式制作卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .card {
      background: var(--bg-card);
      border: 1.5px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      border-color: var(--primary);
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }

    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: #FFF1EB;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      font-weight: 900;
      margin-bottom: 20px;
      border: 1px solid #FFE0D2;
    }

    .card-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

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

    /* 对比评测高亮板块 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #FFF5F0 0%, #FFFFFF 100%);
      border: 2px solid #FFD3C2;
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      box-shadow: var(--shadow-md);
    }

    .eval-score-area {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .eval-score-circle {
      width: 100px;
      height: 100px;
      border-radius: 50%;
      background: linear-gradient(135deg, #FF4D00, #FF7A00);
      color: #FFFFFF;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 18px rgba(255, 77, 0, 0.35);
    }

    .eval-score-num {
      font-size: 32px;
      font-weight: 900;
      line-height: 1;
    }

    .eval-score-max {
      font-size: 13px;
      opacity: 0.9;
    }

    .eval-info h3 {
      font-size: 22px;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .eval-stars {
      color: #FF9900;
      font-size: 20px;
      margin-bottom: 6px;
      letter-spacing: 2px;
    }

    .eval-desc {
      font-size: 14px;
      color: var(--text-muted);
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1.5px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .custom-table th {
      background: #FFF1EB;
      color: var(--text-main);
      font-weight: 800;
      font-size: 15px;
      padding: 16px 20px;
      border-bottom: 2px solid #FFE0D2;
    }

    .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
      color: var(--text-regular);
    }

    .custom-table tr:hover {
      background-color: #FAFAFA;
    }

    .custom-table .col-strong {
      font-weight: 700;
      color: var(--primary);
    }

    /* 案例展示 */
    .case-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

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

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #F1F5F9;
      overflow: hidden;
    }

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

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

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

    .case-body {
      padding: 20px;
    }

    .case-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--accent-blue);
      background: #EFF6FF;
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 10px;
    }

    .case-title {
      font-size: 17px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .case-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 标准流程时间线 */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-box {
      background: #FFFFFF;
      border: 1.5px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      transition: all 0.3s ease;
    }

    .step-box:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }

    .step-index {
      font-size: 28px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 14px;
      opacity: 0.85;
    }

    .step-title {
      font-size: 18px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 8px;
    }

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

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

    .faq-item {
      background: #FFFFFF;
      border: 1.5px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.25s ease;
    }

    .faq-item.active {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

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

    .faq-toggle-icon {
      font-size: 18px;
      font-weight: 900;
      color: var(--primary);
      transition: transform 0.3s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #FAFBFD;
      color: var(--text-regular);
      font-size: 14px;
      line-height: 1.7;
      padding: 0 24px;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 22px 24px;
      border-top: 1px dashed var(--border-color);
    }

    /* 评论卡片 */
    .review-card {
      background: #FFFFFF;
      border: 1.5px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.3s ease;
    }

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

    .review-quote {
      font-size: 14px;
      color: var(--text-regular);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
    }

    .author-info h4 {
      font-size: 15px;
      font-weight: 800;
      color: var(--text-main);
    }

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

    /* 表单与联系 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1.5px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 24px;
    }

    .contact-icon {
      width: 42px;
      height: 42px;
      border-radius: 10px;
      background: #FFF1EB;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 18px;
      flex-shrink: 0;
    }

    .contact-text h4 {
      font-size: 16px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

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

    .qr-container {
      display: flex;
      align-items: center;
      gap: 18px;
      background: #F8FAFC;
      padding: 18px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .qr-container img {
      width: 90px;
      height: 90px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

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

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 14px;
      border-radius: var(--radius-sm);
      border: 1.5px solid var(--border-color);
      background: #FFFFFF;
      color: var(--text-main);
      transition: all 0.25s ease;
      font-family: inherit;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(255, 77, 0, 0.15);
    }

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

    /* 文章与资讯列表 */
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 20px;
      background: #FFFFFF;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      transition: all 0.2s ease;
    }

    .article-item:hover {
      border-color: var(--primary);
      background: #FFFBF9;
      transform: translateX(4px);
    }

    .article-item a {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }

    .article-item a:hover {
      color: var(--primary);
    }

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

    /* 友情链接与页脚 */
    .site-footer {
      background: #111827;
      color: #94A3B8;
      padding: 60px 0 30px 0;
      border-top: 4px solid var(--primary);
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-brand h3 {
      color: #FFFFFF;
      font-size: 20px;
      font-weight: 900;
      margin-bottom: 14px;
    }

    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 18px;
    }

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 800;
      margin-bottom: 16px;
      position: relative;
      padding-bottom: 8px;
    }

    .footer-col h4::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 24px;
      height: 2px;
      background: var(--primary);
    }

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

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a {
      color: #94A3B8;
    }

    .footer-links a:hover {
      color: #FFFFFF;
      padding-left: 4px;
    }

    .friend-links-box {
      border-top: 1px solid #1F2937;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      color: #CBD5E1;
      font-weight: 800;
      font-size: 14px;
      margin-bottom: 12px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-list a {
      color: #94A3B8;
      font-size: 13px;
    }

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

    .footer-bottom {
      border-top: 1px solid #1F2937;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748B;
    }

    /* 悬浮工具栏 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      background: #FFFFFF;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 14px;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .floating-btn:hover {
      background: var(--primary);
      color: #FFFFFF;
      transform: scale(1.1);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .grid-4, .hero-grid-stats, .timeline-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 34px;
      }
    }

    @media (max-width: 768px) {
      .grid-3, .grid-2, .grid-4, .hero-grid-stats, .timeline-steps, .footer-grid {
        grid-template-columns: 1fr;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-wrapper {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        border-bottom: 2px solid var(--primary);
        padding: 20px;
        box-shadow: var(--shadow-lg);
      }
      .nav-wrapper.show {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 0;
      }
      .header-actions {
        display: none;
      }
      .eval-highlight-box {
        flex-direction: column;
        text-align: center;
      }
      .eval-score-area {
        flex-direction: column;
      }
      .hero-title {
        font-size: 28px;
      }
      .section-title {
        font-size: 26px;
      }
    }