* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --bg-base: #fbf8f2;
      --bg-soft: #fffefb;
      --ink: #1d2a2f;
      --ink-light: #485b63;
      --primary: #d64b2a;
      --primary-light: #f96b4c;
      --primary-soft: #fee9e2;
      --secondary: #1e6f5c;
      --accent: #e8b86d;
      --card-bg: #ffffff;
      --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.03);
      --shadow-md: 0 10px 30px -8px rgba(0, 0, 0, 0.08);
      --shadow-lg: 0 24px 48px -12px rgba(0, 0, 0, 0.12);
      --radius: 24px;
      --radius-sm: 16px;
      --radius-xs: 12px;
      --container: 1180px;
      --transition: 0.25s ease;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-base);
      background-image: radial-gradient(circle at 10% 20%, rgba(232, 184, 109, 0.06) 0%, transparent 30%),
                        radial-gradient(circle at 90% 70%, rgba(254, 107, 76, 0.06) 0%, transparent 40%);
      color: var(--ink);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      width: 100%;
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 24px;
    }
    h1, h2, h3, h4 {
      font-weight: 700;
      line-height: 1.25;
      letter-spacing: -0.02em;
      color: var(--ink);
    }
    h1 {
      font-size: 2.65rem;
      margin-bottom: 0.5rem;
    }
    h2 {
      font-size: 2rem;
      margin-bottom: 0.75rem;
    }
    h3 {
      font-size: 1.35rem;
      margin-bottom: 0.5rem;
    }
    p {
      color: var(--ink-light);
    }
    a {
      text-decoration: none;
      color: var(--primary);
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    ul, ol {
      list-style: none;
    }
    .section {
      padding: 72px 0;
    }
    .section-header {
      max-width: 720px;
      margin-bottom: 48px;
    }
    .section-header .tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--primary);
      background: var(--primary-soft);
      padding: 6px 16px;
      border-radius: 40px;
      margin-bottom: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 32px;
      border-radius: 60px;
      font-weight: 600;
      font-size: 0.95rem;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      background: white;
      color: var(--ink);
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #e66541);
      color: white;
      box-shadow: 0 12px 24px -8px rgba(214, 75, 42, 0.4);
    }
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 18px 30px -8px rgba(214, 75, 42, 0.5);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid rgba(29, 42, 47, 0.15);
      color: var(--ink);
      box-shadow: none;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #fff6f2;
    }
    .btn-sm {
      padding: 10px 22px;
      font-size: 0.875rem;
    }
    /* 导航栏 */
    .navbar {
      background: rgba(255, 254, 251, 0.9);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      position: sticky;
      top: 0;
      z-index: 50;
      border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 0;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.2rem;
      color: var(--ink);
    }
    .brand img {
      height: 36px;
      width: auto;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      margin-left: auto;
      margin-right: 16px;
    }
    .nav-links a {
      padding: 8px 14px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--ink-light);
      white-space: nowrap;
      border-radius: 40px;
    }
    .nav-links a:hover {
      color: var(--primary);
      background: var(--primary-soft);
    }
    .nav-action {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      width: 40px;
      height: 40px;
      font-size: 1.6rem;
      cursor: pointer;
      color: var(--ink);
    }
    /* 移动端菜单隐藏 */
    @media (max-width: 991px) {
      .nav-links {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-soft);
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid #eee;
        box-shadow: 0 20px 30px rgba(0, 0, 0, 0.05);
        gap: 6px;
        margin: 0;
        align-items: stretch;
        z-index: 60;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        padding: 12px 16px;
        font-size: 1rem;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-action .btn {
        display: none;
      }
    }
    /* Hero 首屏 - 无图片 */
    .hero {
      padding: 70px 0 80px;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: -180px;
      right: -80px;
      width: 520px;
      height: 520px;
      background: radial-gradient(circle, rgba(249, 107, 76, 0.15) 0%, transparent 70%);
      border-radius: 50%;
      z-index: 0;
      pointer-events: none;
    }
    .hero::after {
      content: '';
      position: absolute;
      bottom: -120px;
      left: -60px;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(232, 184, 109, 0.18) 0%, transparent 70%);
      border-radius: 50%;
      z-index: 0;
      pointer-events: none;
    }
    .hero .container {
      position: relative;
      z-index: 2;
    }
    .hero-content {
      max-width: 820px;
    }
    .hero .badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: white;
      border-radius: 60px;
      padding: 6px 18px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--secondary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }
    .hero h1 {
      font-size: 3.2rem;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #1d2a2f 30%, #8b3e29 80%);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      letter-spacing: -0.03em;
    }
    .hero-sub {
      font-size: 1.18rem;
      color: var(--ink-light);
      max-width: 640px;
      margin-bottom: 32px;
    }
    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      margin-bottom: 48px;
    }
    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 32px 56px;
      padding-top: 16px;
      border-top: 1px solid rgba(0, 0, 0, 0.06);
    }
    .stat-item h3 {
      font-size: 2rem;
      margin-bottom: 4px;
      color: var(--ink);
    }
    .stat-item p {
      font-size: 0.9rem;
      color: var(--ink-light);
      margin: 0;
    }
    /* 卡片通用 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-sm);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border: 1px solid rgba(0, 0, 0, 0.02);
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 28px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 28px;
    }
    /* 关于我们 */
    .about-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
      align-items: stretch;
    }
    .feature-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 24px;
    }
    .feature-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
    }
    .feature-icon {
      width: 44px;
      height: 44px;
      flex-shrink: 0;
      border-radius: 12px;
      background: var(--primary-soft);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    /* AIGC服务卡片 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 24px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-xs);
      padding: 24px 22px;
      transition: var(--transition);
      border: 1px solid rgba(0,0,0,0.02);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .service-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .service-icon {
      font-size: 1.8rem;
      line-height: 1;
      margin-bottom: 8px;
    }
    .service-card h3 {
      font-size: 1.1rem;
      margin-bottom: 2px;
    }
    .service-card p {
      font-size: 0.9rem;
      color: var(--ink-light);
    }
    /* 流程步骤 */
    .steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
      gap: 20px;
      counter-reset: step;
    }
    .step-item {
      background: white;
      border-radius: var(--radius-xs);
      padding: 24px 20px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .step-item::before {
      counter-increment: step;
      content: counter(step);
      display: flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), #f58b6c);
      color: white;
      border-radius: 50%;
      font-weight: 700;
      font-size: 0.95rem;
      margin-bottom: 16px;
    }
    .step-item h3 {
      font-size: 1.1rem;
      margin-bottom: 6px;
    }
    .step-item p {
      font-size: 0.9rem;
    }
    /* 对比表格 */
    .table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-sm);
      background: white;
      box-shadow: var(--shadow-sm);
      -webkit-overflow-scrolling: touch;
    }
    .compare-table {
      width: 100%;
      min-width: 680px;
      border-collapse: collapse;
      font-size: 0.95rem;
    }
    .compare-table th,
    .compare-table td {
      padding: 18px 20px;
      text-align: left;
      border-bottom: 1px solid #f0ede8;
    }
    .compare-table th {
      background: #f9f6f2;
      font-weight: 600;
      color: var(--ink);
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table .highlight {
      background: #fff7f4;
      font-weight: 600;
      color: var(--primary);
    }
    .rating-stars {
      color: #f5b342;
      letter-spacing: 2px;
      font-size: 1rem;
    }
    /* 评论卡片 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 24px;
    }
    .testimonial-card {
      background: white;
      border-radius: var(--radius-sm);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .testimonial-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(145deg, #fdd7c4, #f8b99c);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #872f16;
      font-size: 1.1rem;
      flex-shrink: 0;
    }
    .testimonial-user h4 {
      font-size: 1rem;
      margin-bottom: 2px;
    }
    .testimonial-user p {
      font-size: 0.8rem;
      color: var(--ink-light);
    }
    .testimonial-card blockquote {
      font-size: 0.95rem;
      color: var(--ink-light);
      font-style: normal;
      line-height: 1.6;
    }
    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 24px;
    }
    .tag-cloud span {
      background: white;
      padding: 8px 18px;
      border-radius: 40px;
      font-size: 0.85rem;
      box-shadow: var(--shadow-sm);
      color: var(--ink-light);
      transition: var(--transition);
    }
    .tag-cloud span:hover {
      background: var(--primary-soft);
      color: var(--primary);
    }
    /* 文章列表、案例 */
    .article-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
    }
    .article-item {
      background: white;
      border-radius: var(--radius-xs);
      padding: 22px;
      border-left: 4px solid var(--primary);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .article-item:hover {
      transform: translateX(6px);
    }
    .article-item a {
      font-weight: 600;
      color: var(--ink);
      display: block;
      margin-bottom: 6px;
    }
    .article-item a:hover {
      color: var(--primary);
    }
    /* 表单 */
    .form-card {
      background: white;
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-lg);
      max-width: 760px;
      margin: 0 auto;
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group label {
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--ink);
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      padding: 14px 18px;
      border: 1.5px solid #eae5df;
      border-radius: 16px;
      font-size: 0.95rem;
      background: var(--bg-soft);
      transition: var(--transition);
      font-family: inherit;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(214, 75, 42, 0.1);
    }
    .form-group textarea {
      min-height: 120px;
      resize: vertical;
    }
    .full-width {
      grid-column: 1 / -1;
    }
    /* FAQ 折叠 */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: white;
      border-radius: var(--radius-xs);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      transition: var(--transition);
      color: var(--ink);
    }
    .faq-question:hover {
      background: #fefbf9;
    }
    .faq-question span {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.3s;
    }
    .faq-item.active .faq-question span {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--ink-light);
      font-size: 0.95rem;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
    }
    /* footer */
    .footer {
      background: #1d2a2f;
      color: #e6ecef;
      padding: 60px 0 24px;
      margin-top: 40px;
    }
    .footer a {
      color: #c9d6dd;
    }
    .footer a:hover {
      color: #ffffff;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1.2fr 1.2fr 1.2fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand p {
      color: #b4c2cb;
      font-size: 0.95rem;
      margin-top: 12px;
    }
    .footer h4 {
      color: white;
      font-size: 1rem;
      margin-bottom: 16px;
    }
    .footer ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer ul a {
      font-size: 0.9rem;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-size: 0.875rem;
      color: #9fb0b9;
    }
    .floating-support {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 60;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
    }
    .floating-support .support-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: white;
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      cursor: pointer;
      transition: var(--transition);
      color: var(--ink);
    }
    .floating-support .support-btn:hover {
      transform: scale(1.06);
      box-shadow: var(--shadow-lg);
    }
    .back-top {
      opacity: 0;
      visibility: hidden;
      transition: var(--transition);
    }
    .back-top.show {
      opacity: 1;
      visibility: visible;
    }
    /* 响应式 */
    @media (max-width: 991px) {
      h1 { font-size: 2.5rem; }
      .hero h1 { font-size: 2.6rem; }
      .about-grid { grid-template-columns: 1fr; gap: 32px; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .form-row { grid-template-columns: 1fr; }
    }
    @media (max-width: 767px) {
      h1 { font-size: 2rem; }
      .hero h1 { font-size: 2.1rem; }
      h2 { font-size: 1.7rem; }
      .section { padding: 56px 0; }
      .hero { padding: 50px 0 60px; }
      .hero-stats { gap: 24px; }
      .stat-item h3 { font-size: 1.6rem; }
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .form-card { padding: 28px 20px; }
      .nav-wrap { padding: 10px 0; }
    }
    @media (max-width: 480px) {
      .hero h1 { font-size: 1.8rem; }
      .hero-buttons .btn { width: 100%; }
      .card { padding: 20px; }
    }
    /* 滚动渐入 */
    .fade-up {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }
    .sr-only {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      border: 0;
    }