:root {
      --primary: #4F46E5;
      --primary-hover: #4338CA;
      --accent: #FF3366;
      --accent-yellow: #FFB800;
      --accent-cyan: #06B6D4;
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-sub: #475569;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --border-strong: #CBD5E1;
      --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 20px 35px -10px rgba(15, 23, 42, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
    }

    * {
      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-main);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 2px solid var(--border-color);
    }

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

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

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

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

    .brand-tag {
      font-size: 11px;
      font-weight: 700;
      background: var(--accent);
      color: #FFFFFF;
      padding: 2px 8px;
      border-radius: var(--radius-full);
      text-transform: uppercase;
    }

    .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-sub);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .nav-links li a:hover,
    .nav-links li a.ai-page-home-link {
      color: var(--primary);
      background: #EEF2FF;
    }

    .nav-action {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      padding: 10px 20px;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 2px solid transparent;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(79, 70, 229, 0.35);
    }

    .btn-accent {
      background: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(255, 51, 102, 0.25);
    }

    .btn-accent:hover {
      background: #E02454;
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(255, 51, 102, 0.35);
    }

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

    .btn-outline:hover {
      background: #EEF2FF;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
      padding: 4px;
    }

    /* 模块通用样式 */
    .section-wrap {
      padding-top: 80px;
      padding-bottom: 80px;
      position: relative;
    }

    .section-alt {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px auto;
    }

    .section-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      font-weight: 800;
      color: var(--primary);
      background: #EEF2FF;
      border: 1px solid #C7D2FE;
      padding: 4px 14px;
      border-radius: var(--radius-full);
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

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

    /* 首屏 Hero 区域（禁止图片） */
    .hero-section {
      padding-top: 70px;
      padding-bottom: 80px;
      background: radial-gradient(circle at 80% 20%, rgba(255, 51, 102, 0.08) 0%, transparent 40%),
                  radial-gradient(circle at 20% 80%, rgba(79, 70, 229, 0.08) 0%, transparent 40%),
                  #F8FAFC;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FFFFFF;
      border: 2px solid var(--accent-yellow);
      padding: 6px 16px;
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    .hero-badge span {
      background: var(--accent-yellow);
      color: #78350F;
      font-size: 11px;
      padding: 2px 6px;
      border-radius: 4px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-content h1 .highlight-blue {
      color: var(--primary);
    }

    .hero-content h1 .highlight-pink {
      color: var(--accent);
    }

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

    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 36px;
    }

    .hero-buttons .btn {
      font-size: 16px;
      padding: 14px 28px;
    }

    .hero-trust-bar {
      display: flex;
      align-items: center;
      gap: 24px;
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
    }

    .trust-item {
      display: flex;
      flex-direction: column;
    }

    .trust-num {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }

    .trust-label {
      font-size: 12px;
      color: var(--text-muted);
      font-weight: 600;
    }

    .hero-dashboard {
      background: #FFFFFF;
      border: 2px solid var(--border-strong);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .dashboard-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 16px;
      margin-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .dashboard-title {
      font-size: 16px;
      font-weight: 800;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .status-dot {
      width: 10px;
      height: 10px;
      background: #10B981;
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
    }

    .model-pills-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      margin-bottom: 20px;
    }

    .model-pill {
      background: #F1F5F9;
      border: 1px solid #CBD5E1;
      padding: 10px 8px;
      border-radius: var(--radius-sm);
      text-align: center;
      font-size: 12px;
      font-weight: 700;
      color: var(--text-main);
      transition: all 0.2s ease;
    }

    .model-pill:hover {
      background: #EEF2FF;
      border-color: var(--primary);
      color: var(--primary);
    }

    .dashboard-stat-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .dash-stat-box {
      background: #FAFAFA;
      border-radius: var(--radius-md);
      padding: 14px;
      border-left: 4px solid var(--accent);
    }

    .dash-stat-box.blue {
      border-left-color: var(--primary);
    }

    .dash-stat-label {
      font-size: 11px;
      font-weight: 600;
      color: var(--text-muted);
      margin-bottom: 4px;
    }

    .dash-stat-val {
      font-size: 16px;
      font-weight: 800;
      color: var(--text-main);
    }

    /* 服务能力与一站式制作卡片 */
    .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: 24px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
      position: relative;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
    }

    .service-tag {
      align-self: flex-start;
      font-size: 11px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: var(--radius-full);
      margin-bottom: 16px;
      background: #EEF2FF;
      color: var(--primary);
    }

    .service-tag.pink {
      background: #FFE4E6;
      color: var(--accent);
    }

    .service-tag.yellow {
      background: #FEF3C7;
      color: #B45309;
    }

    .service-card h3 {
      font-size: 19px;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .service-card p {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 18px;
    }

    .feature-list {
      list-style: none;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
      margin-bottom: 16px;
    }

    .feature-list li {
      font-size: 13px;
      color: var(--text-sub);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .feature-list li::before {
      content: "✓";
      color: #10B981;
      font-weight: bold;
    }

    /* 案例图片展示区 */
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .media-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }

    .media-img-wrap {
      width: 100%;
      height: 220px;
      overflow: hidden;
      background: #F1F5F9;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

    .media-card:hover .media-img-wrap img {
      transform: scale(1.05);
    }

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

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

    .media-card-desc {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 评测与对比板块 */
    .review-score-panel {
      background: linear-gradient(135deg, #1E1B4B 0%, #312E81 100%);
      border-radius: var(--radius-lg);
      padding: 40px;
      color: #FFFFFF;
      margin-bottom: 40px;
      display: grid;
      grid-template-columns: 0.8fr 1.2fr;
      gap: 36px;
      align-items: center;
    }

    .score-badge-box {
      text-align: center;
      background: rgba(255, 255, 255, 0.08);
      border: 2px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-md);
      padding: 28px;
    }

    .stars-line {
      color: #FBBF24;
      font-size: 24px;
      margin-bottom: 8px;
      letter-spacing: 2px;
    }

    .big-score-num {
      font-size: 54px;
      font-weight: 900;
      color: #FBBF24;
      line-height: 1;
      margin-bottom: 6px;
    }

    .score-scale-text {
      font-size: 14px;
      color: #CBD5E1;
      font-weight: 600;
    }

    .score-summary-title {
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 12px;
      color: #FFFFFF;
    }

    .score-summary-desc {
      font-size: 14px;
      color: #E2E8F0;
      line-height: 1.8;
      margin-bottom: 18px;
    }

    .score-highlights {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .score-pill {
      background: rgba(255, 255, 255, 0.15);
      font-size: 12px;
      padding: 6px 14px;
      border-radius: var(--radius-full);
      font-weight: 600;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

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

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

    .compare-table th {
      background: #F8FAFC;
      color: var(--text-main);
      font-weight: 800;
    }

    .compare-table td.highlight-col {
      background: #F5F3FF;
      font-weight: 700;
      color: var(--primary);
    }

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

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

    .step-num-badge {
      width: 38px;
      height: 38px;
      background: var(--primary);
      color: #FFFFFF;
      font-size: 18px;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }

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

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

    /* 用户评论 */
    .testimonial-card {
      background: #FFFFFF;
      border: 1px 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;
    }

    .testimonial-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 16px;
      font-style: italic;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .author-avatar-badge {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #EEF2FF;
      color: var(--primary);
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      border: 1px solid #C7D2FE;
    }

    .author-name {
      font-size: 14px;
      font-weight: 800;
      color: var(--text-main);
    }

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

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

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

    .faq-item:hover {
      border-color: #CBD5E1;
    }

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

    .faq-toggle-icon {
      font-size: 20px;
      font-weight: 400;
      color: var(--primary);
      transition: transform 0.3s ease;
    }

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

    .faq-answer {
      display: none;
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
      border-top: 1px dashed var(--border-color);
      padding-top: 16px;
    }

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

    /* 表单与联系区 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }

    .contact-info-panel {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
    }

    .contact-info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 18px;
      margin-top: 24px;
    }

    .contact-info-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      font-size: 14px;
      color: var(--text-sub);
    }

    .info-label {
      font-weight: 700;
      color: var(--text-main);
      min-width: 80px;
    }

    .qrcode-box {
      margin-top: 24px;
      padding: 20px;
      background: #F8FAFC;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
    }

    .qrcode-box img {
      width: 140px;
      height: 140px;
      display: block;
      border-radius: var(--radius-sm);
    }

    .form-panel {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

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

    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 14px;
      font-size: 14px;
      border: 1px solid var(--border-strong);
      border-radius: var(--radius-sm);
      color: var(--text-main);
      background: #FFFFFF;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    }

    /* 资讯与外链板块 */
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 14px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: all 0.2s ease;
    }

    .article-item:hover {
      border-color: var(--primary);
      background: #F8FAFC;
    }

    .article-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

    .article-date {
      font-size: 12px;
      color: var(--text-muted);
      white-space: nowrap;
    }

    /* 页脚 */
    .site-footer {
      background: #0F172A;
      color: #94A3B8;
      padding-top: 60px;
      padding-bottom: 30px;
      border-top: 3px solid var(--primary);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 800;
      margin-bottom: 18px;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col ul li a {
      color: #94A3B8;
      font-size: 13px;
    }

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

    .friend-links-box {
      padding-top: 24px;
      margin-top: 24px;
      border-top: 1px solid #334155;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links-box span {
      color: #FFFFFF;
      font-size: 13px;
      font-weight: 700;
    }

    .friend-links-box a {
      color: #94A3B8;
      font-size: 13px;
      transition: color 0.2s ease;
    }

    .friend-links-box a:hover {
      color: var(--accent-yellow);
    }

    .footer-bottom {
      padding-top: 24px;
      margin-top: 24px;
      border-top: 1px solid #1E293B;
      text-align: center;
      font-size: 13px;
      color: #64748B;
    }

    /* 浮动客服 */
    .floating-widget {
      position: fixed;
      right: 20px;
      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;
      font-size: 14px;
      font-weight: 800;
      box-shadow: var(--shadow-lg);
      cursor: pointer;
      border: none;
      transition: transform 0.2s ease, background-color 0.2s ease;
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: var(--accent);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid,
      .review-score-panel,
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .grid-4,
      .step-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3,
      .media-card-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links,
      .nav-action .btn-outline {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-content h1 {
        font-size: 32px;
      }
      .grid-3,
      .grid-4,
      .grid-2,
      .media-card-grid,
      .step-grid,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-wrap {
        padding-top: 50px;
        padding-bottom: 50px;
      }
      .section-title {
        font-size: 26px;
      }
    }