:root {
      --primary: #0b132b;
      --accent-neon-cyan: #00f2fe;
      --accent-neon-pink: #fe0979;
      --accent-neon-purple: #7928ca;
      --accent-neon-lime: #00f7a5;
      --text-main: #1e2640;
      --text-muted: #5c6b8c;
      --bg-base: #f8fafc;
      --bg-card: #ffffff;
      --border-light: rgba(121, 40, 202, 0.12);
      --neon-shadow: 0 10px 30px -5px rgba(0, 242, 254, 0.2), 0 0 15px rgba(254, 9, 121, 0.1);
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      background-image: 
        radial-gradient(circle at 10% 15%, rgba(0, 242, 254, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 90% 40%, rgba(254, 9, 121, 0.04) 0%, transparent 45%),
        radial-gradient(circle at 50% 85%, rgba(121, 40, 202, 0.04) 0%, transparent 50%);
      background-attachment: fixed;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    .container {
      width: 100%;
      max-width: 1200px;
      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, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0, 242, 254, 0.15);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }

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

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
      display: block;
    }

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      background: linear-gradient(135deg, #0b132b, #7928ca);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

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

    .nav-item {
      position: relative;
    }

    .nav-item a {
      display: block;
      padding: 10px 14px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      border-radius: 8px;
    }

    .nav-item a:hover {
      color: var(--accent-neon-purple);
      background: rgba(0, 242, 254, 0.08);
    }

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

    .btn-neon-glow {
      position: relative;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 700;
      color: #ffffff !important;
      background: linear-gradient(135deg, var(--accent-neon-purple), var(--accent-neon-pink));
      border-radius: 50px;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(254, 9, 121, 0.3);
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-neon-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(254, 9, 121, 0.45);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

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

    /* 区域通用结构 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

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

    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      padding: 4px 12px;
      border-radius: 30px;
      background: rgba(0, 242, 254, 0.1);
      color: #0077b6;
      border: 1px solid rgba(0, 242, 254, 0.3);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
    }

    /* 首屏 Hero（无任何图片） */
    .hero-section {
      padding: 90px 0 70px 0;
      position: relative;
      overflow: hidden;
    }

    .hero-box {
      border: 2px solid transparent;
      background: linear-gradient(#ffffff, #ffffff) padding-box,
                  linear-gradient(135deg, var(--accent-neon-cyan), var(--accent-neon-purple), var(--accent-neon-pink)) border-box;
      border-radius: 28px;
      padding: 60px 40px;
      text-align: center;
      box-shadow: var(--neon-shadow);
      position: relative;
      overflow: hidden;
    }

    .hero-badge-row {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(121, 40, 202, 0.06);
      border: 1px solid rgba(121, 40, 202, 0.2);
      padding: 6px 18px;
      border-radius: 50px;
      margin-bottom: 24px;
    }

    .neon-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent-neon-lime);
      box-shadow: 0 0 10px var(--accent-neon-lime);
    }

    .hero-badge-text {
      font-size: 13px;
      font-weight: 700;
      color: var(--accent-neon-purple);
    }

    .hero-main-title {
      font-size: 42px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 20px;
      line-height: 1.25;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px auto;
      line-height: 1.6;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 18px;
      margin-bottom: 44px;
    }

    .btn-hero-primary {
      padding: 14px 34px;
      font-size: 16px;
      font-weight: 700;
      color: #ffffff !important;
      background: linear-gradient(135deg, #00f2fe 0%, #7928ca 50%, #fe0979 100%);
      border-radius: 50px;
      border: none;
      cursor: pointer;
      box-shadow: 0 10px 25px rgba(121, 40, 202, 0.35);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-hero-primary:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 14px 30px rgba(254, 9, 121, 0.45);
    }

    .btn-hero-secondary {
      padding: 14px 30px;
      font-size: 16px;
      font-weight: 600;
      color: var(--primary);
      background: #f1f5f9;
      border: 1px solid rgba(0, 0, 0, 0.08);
      border-radius: 50px;
      transition: var(--transition);
    }

    .btn-hero-secondary:hover {
      background: #e2e8f0;
      color: var(--accent-neon-purple);
    }

    /* 指标统计栏 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 10px;
    }

    .metric-card {
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid rgba(0, 242, 254, 0.2);
      border-radius: 16px;
      padding: 24px;
      text-align: center;
      transition: var(--transition);
    }

    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 25px rgba(0, 0, 0, 0.05);
      border-color: var(--accent-neon-purple);
    }

    .metric-number {
      font-size: 34px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 6px;
      background: linear-gradient(135deg, #0b132b, #fe0979);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 模型矩阵胶囊 */
    .model-tags-wrapper {
      margin-top: 36px;
      padding-top: 24px;
      border-top: 1px dashed rgba(0, 0, 0, 0.1);
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-pill {
      font-size: 12px;
      font-weight: 600;
      padding: 4px 12px;
      background: #f1f5f9;
      color: var(--text-main);
      border-radius: 20px;
      border: 1px solid rgba(0, 0, 0, 0.05);
      transition: var(--transition);
    }

    .model-pill:hover {
      background: rgba(0, 242, 254, 0.15);
      color: #0b132b;
      border-color: var(--accent-neon-cyan);
    }

    /* 场景卡片通用 */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: 20px;
      padding: 32px 24px;
      position: relative;
      transition: var(--transition);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
      display: flex;
      flex-direction: column;
    }

    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 20px;
      right: 20px;
      height: 3px;
      background: linear-gradient(90deg, var(--accent-neon-cyan), var(--accent-neon-pink));
      border-radius: 0 0 4px 4px;
      opacity: 0;
      transition: var(--transition);
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 16px 30px rgba(121, 40, 202, 0.08);
      border-color: rgba(121, 40, 202, 0.3);
    }

    .feature-card:hover::before {
      opacity: 1;
    }

    .feature-icon-badge {
      width: 48px;
      height: 48px;
      border-radius: 14px;
      background: linear-gradient(135deg, rgba(0, 242, 254, 0.15), rgba(254, 9, 121, 0.15));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: var(--accent-neon-purple);
      margin-bottom: 20px;
    }

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

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

    /* 评测板块对比表 */
    .review-summary {
      background: linear-gradient(135deg, #0b132b, #1e2640);
      border-radius: 20px;
      padding: 36px;
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      margin-bottom: 30px;
      box-shadow: 0 10px 30px rgba(11, 19, 43, 0.2);
    }

    .review-score-box {
      display: flex;
      align-items: baseline;
      gap: 10px;
    }

    .review-huge-num {
      font-size: 52px;
      font-weight: 900;
      color: var(--accent-neon-lime);
      line-height: 1;
    }

    .review-max-num {
      font-size: 20px;
      color: #94a3b8;
    }

    .review-stars {
      color: #ffb703;
      font-size: 22px;
      letter-spacing: 2px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: 16px;
      border: 1px solid var(--border-light);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
    }

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

    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      font-size: 14px;
      border-bottom: 1px solid #f1f5f9;
    }

    .comparison-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--primary);
    }

    .highlight-cell {
      color: var(--accent-neon-purple);
      font-weight: 700;
      background: rgba(121, 40, 202, 0.02);
    }

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

    .step-box {
      background: var(--bg-card);
      border-radius: 16px;
      padding: 28px 20px;
      border: 1px solid var(--border-light);
      position: relative;
    }

    .step-badge {
      font-size: 12px;
      font-weight: 800;
      color: var(--accent-neon-pink);
      background: rgba(254, 9, 121, 0.08);
      padding: 4px 10px;
      border-radius: 8px;
      display: inline-block;
      margin-bottom: 14px;
    }

    .step-box h4 {
      font-size: 17px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }

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

    /* 媒体视觉图片陈列 */
    .media-gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 30px;
    }

    .media-item {
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid rgba(0, 242, 254, 0.2);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.04);
      background: #ffffff;
      transition: var(--transition);
    }

    .media-item:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 28px rgba(121, 40, 202, 0.12);
    }

    .media-item img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .media-banner-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .ai-page-image {
      border-radius: 12px;
      width: 100%;
      height: auto;
      display: block;
      border: 1px solid rgba(0, 0, 0, 0.06);
    }

    /* 客户评论卡片 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--bg-card);
      border-radius: 18px;
      padding: 28px;
      border: 1px solid var(--border-light);
      box-shadow: 0 4px 18px rgba(0, 0, 0, 0.02);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-stars-static {
      color: #ffb703;
      margin-bottom: 12px;
      font-size: 14px;
    }

    .review-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent-neon-cyan), var(--accent-neon-purple));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

    .reviewer-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--primary);
    }

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

    /* 表单区域 */
    .form-wrapper {
      background: #ffffff;
      border-radius: 24px;
      padding: 44px;
      border: 1px solid rgba(0, 242, 254, 0.3);
      box-shadow: var(--neon-shadow);
      max-width: 800px;
      margin: 0 auto;
    }

    .form-row {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .form-group.full-width {
      margin-bottom: 24px;
    }

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

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #cbd5e1;
      border-radius: 10px;
      font-size: 14px;
      color: var(--text-main);
      background: #f8fafc;
      transition: var(--transition);
      outline: none;
    }

    .form-control:focus {
      border-color: var(--accent-neon-purple);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(121, 40, 202, 0.15);
    }

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

    .btn-submit-form {
      width: 100%;
      padding: 15px;
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, var(--accent-neon-purple), var(--accent-neon-pink));
      border: none;
      border-radius: 12px;
      cursor: pointer;
      box-shadow: 0 8px 20px rgba(254, 9, 121, 0.3);
      transition: var(--transition);
    }

    .btn-submit-form:hover {
      box-shadow: 0 12px 28px rgba(254, 9, 121, 0.45);
      transform: translateY(-2px);
    }

    /* FAQ 折叠 */
    .faq-container {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--bg-card);
      border-radius: 14px;
      border: 1px solid var(--border-light);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: var(--accent-neon-purple);
      box-shadow: 0 6px 20px rgba(121, 40, 202, 0.08);
    }

    .faq-question {
      padding: 20px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
    }

    .faq-toggle-icon {
      font-size: 20px;
      transition: var(--transition);
      color: var(--accent-neon-purple);
    }

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

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

    .faq-item.active .faq-answer {
      padding: 0 24px 20px 24px;
      max-height: 200px;
    }

    /* 文章列表 */
    .article-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-item {
      background: var(--bg-card);
      border-radius: 14px;
      border: 1px solid var(--border-light);
      padding: 20px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-item:hover {
      border-color: var(--accent-neon-cyan);
      transform: translateY(-3px);
      box-shadow: 0 8px 20px rgba(0, 242, 254, 0.1);
    }

    .article-item h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .article-link-out {
      font-size: 13px;
      color: var(--accent-neon-purple);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 页脚 */
    .site-footer {
      background: #0b132b;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      border-top: 2px solid rgba(0, 242, 254, 0.2);
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-col p {
      font-size: 13px;
      line-height: 1.7;
      margin-bottom: 12px;
    }

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

    .footer-links a {
      font-size: 13px;
      color: #94a3b8;
    }

    .footer-links a:hover {
      color: var(--accent-neon-cyan);
    }

    .footer-qr-block {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .footer-qr-img {
      width: 90px;
      height: 90px;
      border-radius: 8px;
      background: #fff;
      padding: 4px;
    }

    .footer-qr-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .friend-links-strip {
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 13px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links-strip a {
      color: #94a3b8;
    }

    .friend-links-strip a:hover {
      color: var(--accent-neon-cyan);
    }

    .footer-bottom {
      text-align: center;
      font-size: 13px;
      color: #64748b;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    /* 悬浮客服面板 */
    .float-widget {
      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: #0b132b;
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
      border: 1px solid var(--accent-neon-cyan);
      cursor: pointer;
      position: relative;
      transition: var(--transition);
    }

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

    .float-qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 12px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
      display: none;
      width: 140px;
      text-align: center;
      border: 1px solid rgba(121, 40, 202, 0.2);
    }

    .float-qr-popup img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 6px;
    }

    .float-qr-popup p {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      margin-top: 6px;
    }

    .float-btn:hover .float-qr-popup {
      display: block;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .feature-grid,
      .article-list,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid,
      .steps-grid,
      .media-banner-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 74px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px 24px;
        border-bottom: 1px solid #e2e8f0;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-item a {
        padding: 12px 0;
        width: 100%;
      }
    }

    @media (max-width: 640px) {
      .hero-main-title {
        font-size: 28px;
      }
      .feature-grid,
      .article-list,
      .reviews-grid,
      .metrics-grid,
      .steps-grid,
      .media-gallery-grid,
      .media-banner-strip,
      .form-row {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-box {
        padding: 36px 20px;
      }
      .form-wrapper {
        padding: 24px 16px;
      }
    }