:root {
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --brand-primary: #0ea5e9;
      --neon-cyan: #00f2fe;
      --neon-pink: #ff007f;
      --neon-purple: #7928ca;
      --neon-green: #10b981;
      --border-color: #e2e8f0;
      --border-glow: rgba(14, 165, 233, 0.3);
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(14, 165, 233, 0.1), 0 8px 10px -6px rgba(14, 165, 233, 0.1);
      --shadow-neon: 0 0 20px rgba(0, 242, 254, 0.25), 0 0 40px rgba(121, 40, 202, 0.15);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-max: 1240px;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      background-image: 
        radial-gradient(circle at 10% 10%, rgba(0, 242, 254, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 90%, rgba(255, 0, 127, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(121, 40, 202, 0.03) 0%, transparent 60%);
      background-attachment: fixed;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

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

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

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

    .brand-logo-wrap img.ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

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

    .nav-links li a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--brand-primary);
      background: rgba(14, 165, 233, 0.08);
    }

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

    .btn-glow-primary {
      background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
      color: #ffffff;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: 30px;
      box-shadow: 0 4px 14px rgba(0, 242, 254, 0.35);
      transition: all 0.3s ease;
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
    }

    .btn-glow-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 242, 254, 0.55);
      color: #ffffff;
    }

    .btn-outline-neon {
      border: 1px solid #7928ca;
      color: #7928ca;
      font-weight: 600;
      padding: 9px 20px;
      border-radius: 30px;
      transition: all 0.3s ease;
      background: rgba(121, 40, 202, 0.04);
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-outline-neon:hover {
      background: #7928ca;
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(121, 40, 202, 0.3);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 模块通用样式 */
    section.page-section {
      padding: 70px 0;
      position: relative;
    }

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

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      padding: 4px 14px;
      border-radius: 20px;
      background: linear-gradient(90deg, rgba(0, 242, 254, 0.15), rgba(121, 40, 202, 0.15));
      color: #0284c7;
      border: 1px solid rgba(14, 165, 233, 0.3);
      margin-bottom: 12px;
      letter-spacing: 1px;
    }

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

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

    /* 首屏 HERO（禁止使用任何图片） */
    .hero-section {
      padding: 80px 0 60px 0;
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.8) 0%, rgba(240, 249, 255, 0.6) 100%);
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-content {
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid rgba(0, 242, 254, 0.5);
      box-shadow: 0 4px 12px rgba(0, 242, 254, 0.15);
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      color: #0284c7;
      margin-bottom: 24px;
    }

    .hero-badge .pulse-dot {
      width: 8px;
      height: 8px;
      background: #00f2fe;
      border-radius: 50%;
      box-shadow: 0 0 10px #00f2fe;
      animation: pulseAnim 2s infinite;
    }

    @keyframes pulseAnim {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 242, 254, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(0, 242, 254, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 242, 254, 0); }
    }

    .hero-title {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title .glow-text {
      background: linear-gradient(135deg, #0ea5e9 0%, #7928ca 50%, #ff007f 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-lead {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 36px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-btns {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 18px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .btn-hero-official {
      background: linear-gradient(135deg, #ff007f 0%, #7928ca 100%);
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: 30px;
      box-shadow: 0 6px 22px rgba(255, 0, 127, 0.4);
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-hero-official:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 10px 30px rgba(255, 0, 127, 0.6);
      color: #ffffff;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .stat-item {
      text-align: center;
      padding: 8px;
      border-right: 1px dashed var(--border-color);
    }

    .stat-item:last-child {
      border-right: none;
    }

    .stat-number {
      font-size: 28px;
      font-weight: 800;
      color: #0ea5e9;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 多模型生态徽章墙 */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 24px;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid rgba(14, 165, 233, 0.2);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      border-color: #00f2fe;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(0, 242, 254, 0.25);
      color: #0284c7;
    }

    /* 卡片通用 */
    .grid-cards {
      display: grid;
      grid-template-columns: repeat(auto-fill, min-min(300px, 1fr));
      gap: 24px;
    }

    .card-tech {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }

    .card-tech::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, #00f2fe, #7928ca, #ff007f);
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .card-tech:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(14, 165, 233, 0.4);
    }

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

    .card-icon-badge {
      width: 46px;
      height: 46px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(0, 242, 254, 0.15), rgba(121, 40, 202, 0.15));
      border: 1px solid rgba(14, 165, 233, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #0284c7;
      font-weight: 800;
      font-size: 18px;
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

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

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

    .step-box {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .step-index {
      font-size: 14px;
      font-weight: 800;
      color: #ff007f;
      background: rgba(255, 0, 127, 0.1);
      display: inline-block;
      padding: 4px 10px;
      border-radius: 6px;
      margin-bottom: 12px;
    }

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

    .step-box p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 评测与比价表格 */
    .table-container {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      overflow-x: auto;
      margin-bottom: 30px;
    }

    table.tech-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    table.tech-table th {
      background: #f1f5f9;
      color: var(--text-main);
      font-weight: 700;
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      white-space: nowrap;
    }

    table.tech-table td {
      padding: 14px 20px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-muted);
      vertical-align: middle;
    }

    table.tech-table tr:hover td {
      background: rgba(240, 249, 255, 0.5);
    }

    .badge-highlight {
      display: inline-block;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 600;
      background: rgba(16, 185, 129, 0.12);
      color: #059669;
    }

    /* 评分卡片 */
    .rating-highlight-card {
      background: linear-gradient(135deg, #ffffff 0%, #f0fdf4 100%);
      border: 2px solid #10b981;
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-neon);
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-score-box {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }

    .score-big {
      font-size: 42px;
      font-weight: 900;
      color: #059669;
      line-height: 1;
    }

    .score-max {
      font-size: 16px;
      color: var(--text-light);
    }

    .stars-glow {
      color: #f59e0b;
      font-size: 20px;
      letter-spacing: 2px;
    }

    /* 宣传图展示区 */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .media-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-card img {
      width: 100%;
      height: 240px;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

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

    .media-card-body {
      padding: 16px;
    }

    .media-card-body h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .media-card-body p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: italic;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }

    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #00f2fe, #7928ca);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 700;
      font-size: 15px;
    }

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

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

    /* FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .faq-item.active {
      border-color: #0ea5e9;
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 20px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      background: none;
      border: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-question:hover {
      color: #0ea5e9;
    }

    .faq-icon {
      font-size: 18px;
      font-weight: 400;
      transition: transform 0.3s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: #ff007f;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fafafa;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.6;
      padding: 0 20px;
    }

    .faq-item.active .faq-answer {
      padding: 16px 20px 20px 20px;
      max-height: 250px;
    }

    /* 表单与联系模块 */
    .contact-form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      padding: 40px;
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      outline: none;
      transition: all 0.25s ease;
      background: #f8fafc;
    }

    .form-control:focus {
      border-color: #0ea5e9;
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
    }

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

    .contact-info-panel {
      background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
      color: #ffffff;
      border-radius: var(--radius-md);
      padding: 30px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-info-panel h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 16px;
      color: #00f2fe;
    }

    .contact-info-panel p {
      color: #cbd5e1;
      font-size: 14px;
      margin-bottom: 12px;
      line-height: 1.6;
    }

    .qr-box-wrap {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-sm);
      padding: 14px;
      display: inline-flex;
      align-items: center;
      gap: 16px;
      margin-top: 16px;
    }

    .qr-box-wrap img {
      width: 90px;
      height: 90px;
      border-radius: 4px;
      background: #fff;
    }

    .qr-box-desc {
      font-size: 13px;
      color: #e2e8f0;
      line-height: 1.5;
    }

    /* 资讯与外链板块 */
    .article-link-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 13px;
      color: var(--text-main);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .article-chip:hover {
      border-color: #0ea5e9;
      color: #0284c7;
      background: #f0f9ff;
    }

    /* 页脚 */
    footer.site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 50px 0 30px 0;
      border-top: 1px solid #1e293b;
      font-size: 14px;
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

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

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 8px;
    }

    .footer-col ul li a {
      color: #94a3b8;
      transition: color 0.2s ease;
    }

    .footer-col ul li a:hover {
      color: #00f2fe;
    }

    .friend-links-box {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
    }

    .friend-links-box span {
      color: #cbd5e1;
      font-weight: 600;
    }

    .friend-links-box a {
      color: #94a3b8;
      font-size: 13px;
      transition: color 0.2s;
    }

    .friend-links-box a:hover {
      color: #00f2fe;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
    }

    /* 浮动客服 */
    .float-kefu-btn {
      position: fixed;
      right: 20px;
      bottom: 80px;
      z-index: 99;
      background: linear-gradient(135deg, #ff007f 0%, #7928ca 100%);
      color: #ffffff;
      border-radius: 50px;
      padding: 12px 18px;
      box-shadow: 0 4px 20px rgba(255, 0, 127, 0.4);
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      font-weight: 700;
      font-size: 14px;
      transition: all 0.3s;
    }

    .float-kefu-btn:hover {
      transform: translateY(-4px) scale(1.05);
      box-shadow: 0 6px 25px rgba(255, 0, 127, 0.6);
      color: #ffffff;
    }

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

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .nav-actions .btn-outline-neon {
        display: none;
      }
    }