:root {
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --primary: #4338ca;
      --primary-hover: #3730a3;
      --accent-cyan: #06b6d4;
      --accent-pink: #ec4899;
      --accent-purple: #8b5cf6;
      --border-color: #e2e8f0;
      --holo-gradient: linear-gradient(135deg, rgba(6,182,212,0.12) 0%, rgba(139,92,246,0.14) 50%, rgba(236,72,153,0.12) 100%);
      --holo-border: linear-gradient(135deg, rgba(6,182,212,0.4), rgba(139,92,246,0.4), rgba(236,72,153,0.4));
      --holo-glow: 0 10px 30px -10px rgba(139,92,246,0.18);
      --container-width: 1200px;
      --radius-lg: 16px;
      --radius-md: 10px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      color: var(--text-main);
      background-color: var(--bg-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    body {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      line-height: 1.6;
      background: radial-gradient(circle at 10% 10%, rgba(6,182,212,0.06) 0%, transparent 40%),
                  radial-gradient(circle at 90% 20%, rgba(236,72,153,0.06) 0%, transparent 40%),
                  radial-gradient(circle at 50% 80%, rgba(139,92,246,0.05) 0%, transparent 50%),
                  var(--bg-main);
      background-attachment: fixed;
    }

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

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

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    }

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

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

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

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .brand-badge {
      font-size: 0.75rem;
      font-weight: 600;
      padding: 2px 8px;
      border-radius: 999px;
      background: var(--holo-gradient);
      border: 1px solid rgba(139,92,246,0.25);
      color: var(--primary);
    }

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

    .nav-links a {
      padding: 8px 12px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 6px;
      display: inline-block;
    }

    .nav-links a:hover {
      color: var(--primary);
      background: rgba(67, 56, 202, 0.05);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.92rem;
      font-weight: 600;
      padding: 9px 20px;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, #4338ca, #6366f1);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(67,56,202,0.28);
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(67,56,202,0.38);
      color: #ffffff;
    }

    .btn-laser {
      position: relative;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid rgba(139,92,246,0.35);
      box-shadow: 0 4px 12px rgba(6,182,212,0.12);
      overflow: hidden;
    }

    .btn-laser::before {
      content: "";
      position: absolute;
      inset: 0;
      background: var(--holo-gradient);
      opacity: 0.7;
      transition: opacity 0.3s ease;
      z-index: 0;
    }

    .btn-laser:hover::before {
      opacity: 1;
    }

    .btn-laser span {
      position: relative;
      z-index: 1;
    }

    .btn-laser:hover {
      border-color: rgba(236,72,153,0.5);
      transform: translateY(-1px);
    }

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .menu-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background-color: var(--text-main);
      border-radius: 2px;
      transition: 0.3s;
    }

    /* 区域通用规范 */
    section {
      padding: 72px 0;
      position: relative;
    }

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

    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      padding: 4px 14px;
      background: var(--holo-gradient);
      border: 1px solid rgba(139,92,246,0.2);
      border-radius: 999px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 首屏 HERO（严格无图片） */
    .hero-section {
      padding: 90px 0 80px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-bubble {
      position: absolute;
      width: 480px;
      height: 480px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(6,182,212,0.18) 0%, rgba(139,92,246,0.12) 50%, rgba(236,72,153,0.05) 100%);
      filter: blur(60px);
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      z-index: 0;
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 1;
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 999px;
      background: #ffffff;
      border: 1px solid rgba(139,92,246,0.3);
      box-shadow: var(--holo-glow);
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
    }

    .hero-kicker-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      box-shadow: 0 0 0 3px rgba(16,185,129,0.25);
    }

    h1.hero-title {
      font-size: 2.7rem;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -1px;
      color: var(--text-main);
      margin-bottom: 20px;
    }

    .hero-title-highlight {
      background: linear-gradient(135deg, #2563eb, #7c3aed, #db2777);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .btn-hero-official {
      font-size: 1.05rem;
      padding: 14px 34px;
      border-radius: var(--radius-md);
      background: linear-gradient(135deg, #3730a3, #4f46e5, #7c3aed);
      color: #ffffff;
      font-weight: 700;
      box-shadow: 0 8px 24px rgba(79,70,229,0.35);
      border: 1px solid rgba(255,255,255,0.2);
    }

    .btn-hero-official:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 30px rgba(79,70,229,0.45);
      color: #ffffff;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.04);
      position: relative;
    }

    .hero-stats::before {
      content: "";
      position: absolute;
      inset: -1px;
      border-radius: inherit;
      background: var(--holo-border);
      z-index: -1;
      opacity: 0.6;
    }

    .stat-item {
      text-align: center;
    }

    .stat-value {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.85rem;
      color: var(--text-light);
      font-weight: 500;
    }

    /* 镭射卡片基础 */
    .holo-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      position: relative;
      transition: all 0.3s ease;
      box-shadow: 0 4px 16px rgba(0,0,0,0.02);
      overflow: hidden;
    }

    .holo-card::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, #06b6d4, #8b5cf6, #ec4899);
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .holo-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 36px rgba(139,92,246,0.1);
      border-color: rgba(139,92,246,0.3);
    }

    .holo-card:hover::after {
      opacity: 1;
    }

    /* 模型矩阵与平台能力 */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-tag {
      font-size: 0.82rem;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 8px;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      transition: 0.2s;
    }

    .model-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(67,56,202,0.04);
    }

    /* 一站式制作场景 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

    .feature-icon-badge {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--holo-gradient);
      border: 1px solid rgba(139,92,246,0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      color: var(--primary);
      font-weight: 700;
      font-size: 1.1rem;
    }

    .feature-title {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .feature-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 流程步骤 */
    .step-list {
      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-number {
      display: inline-block;
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--primary);
      padding: 4px 10px;
      border-radius: 6px;
      background: var(--holo-gradient);
      margin-bottom: 12px;
    }

    .step-item h3 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 对比评测模块 */
    .evaluation-summary {
      background: #ffffff;
      border: 1px solid rgba(139,92,246,0.3);
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      box-shadow: var(--holo-glow);
      background: linear-gradient(135deg, rgba(255,255,255,1), rgba(248,250,252,0.9));
    }

    .rating-score {
      font-size: 3.2rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .stars {
      color: #f59e0b;
      font-size: 1.2rem;
      letter-spacing: 2px;
      margin-top: 4px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
    }

    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

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

    table.compare-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    table.compare-table tr:hover {
      background: rgba(67,56,202,0.02);
    }

    .td-highlight {
      background: rgba(139,92,246,0.04);
      font-weight: 600;
      color: var(--primary);
    }

    /* 案例图片展示容器 */
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 4px 16px rgba(0,0,0,0.02);
    }

    .media-card-img-wrap {
      width: 100%;
      aspect-ratio: 16/9;
      background: #e2e8f0;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

    .media-card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

    .media-card:hover img {
      transform: scale(1.03);
    }

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

    .media-card-body h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .media-card-body p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 需求匹配与表单 */
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      max-width: 760px;
      margin: 0 auto;
      box-shadow: 0 10px 30px rgba(0,0,0,0.03);
      position: relative;
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.92rem;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      background: #f8fafc;
      color: var(--text-main);
      transition: border-color 0.2s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(67,56,202,0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    /* 折叠 FAQ */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 880px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.2s ease;
    }

    .faq-header {
      padding: 18px 24px;
      font-size: 1.02rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

    .faq-header:hover {
      background: rgba(67,56,202,0.02);
      color: var(--primary);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.2s ease;
      color: var(--text-light);
    }

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

    .faq-body {
      padding: 0 24px 18px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }

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

    /* 客户评论卡片 */
    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }

    .testimonial-quote {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
      z-index: 1;
    }

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

    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--holo-gradient);
      border: 1px solid rgba(139,92,246,0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      font-size: 0.9rem;
    }

    .author-name {
      font-weight: 700;
      font-size: 0.92rem;
      color: var(--text-main);
    }

    .author-role {
      font-size: 0.78rem;
      color: var(--text-light);
    }

    /* 文章与外链 */
    .article-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      margin-top: 24px;
    }

    .article-url-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      list-style: none;
      margin-top: 12px;
    }

    .article-url-list a {
      font-size: 0.85rem;
      color: var(--primary);
      padding: 6px 12px;
      background: #f1f5f9;
      border-radius: 6px;
      word-break: break-all;
    }

    .article-url-list a:hover {
      background: var(--holo-gradient);
      color: #000000;
    }

    /* 底部通用规范 */
    footer.site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 56px 0 24px;
      margin-top: 40px;
    }

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

    .footer-brand-info p {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin: 12px 0 20px;
      max-width: 360px;
    }

    .footer-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

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

    .footer-links a {
      font-size: 0.86rem;
      color: var(--text-muted);
    }

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

    .footer-qrcode {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
    }

    .footer-qrcode img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      padding: 4px;
      background: #ffffff;
    }

    .footer-qrcode span {
      font-size: 0.78rem;
      color: var(--text-light);
    }

    .friend-links-wrap {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 0.85rem;
      color: var(--text-light);
    }

    .friend-links-wrap a {
      color: var(--text-muted);
    }

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

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* 浮动客服 */
    .floating-kefu {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 10px;
    }

    .kefu-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: linear-gradient(135deg, #4338ca, #8b5cf6);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 24px rgba(67,56,202,0.35);
      cursor: pointer;
      border: none;
      transition: transform 0.2s;
    }

    .kefu-btn:hover {
      transform: scale(1.08);
    }

    .kefu-popover {
      display: none;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 14px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.12);
      text-align: center;
      width: 140px;
    }

    .kefu-popover img {
      width: 100%;
      height: auto;
      border-radius: 4px;
      display: block;
    }

    .kefu-popover p {
      font-size: 0.78rem;
      color: var(--text-muted);
      margin-top: 6px;
    }

    .floating-kefu:hover .kefu-popover {
      display: block;
    }

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

    @media (max-width: 768px) {
      h1.hero-title {
        font-size: 1.95rem;
      }
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .grid-2, .grid-4 {
        grid-template-columns: 1fr;
      }
      .step-list {
        grid-template-columns: 1fr;
      }
      .evaluation-summary {
        flex-direction: column;
        text-align: center;
      }
      .menu-toggle {
        display: flex;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: stretch;
        border-bottom: 1px solid var(--border-color);
        padding: 12px 20px 20px;
        box-shadow: 0 10px 24px rgba(0,0,0,0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        padding: 12px;
        border-bottom: 1px solid #f1f5f9;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }