:root {
      --bg-main: #0c0814;
      --bg-surface: #140e24;
      --bg-surface-elevated: #1e1335;
      --bg-card: rgba(33, 19, 58, 0.72);
      --border-color: rgba(236, 72, 153, 0.25);
      --border-hover: rgba(244, 114, 182, 0.6);
      --primary-pink: #ec4899;
      --primary-purple: #8b5cf6;
      --accent-cyan: #06b6d4;
      --glow-pink: rgba(236, 72, 153, 0.45);
      --glow-purple: rgba(139, 92, 246, 0.45);
      --text-main: #f8fafc;
      --text-muted: #cbd5e1;
      --text-dim: #94a3b8;
      --container-max: 1200px;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      background-color: var(--bg-main);
      background-image: 
        radial-gradient(circle at 15% 10%, rgba(236, 72, 153, 0.14), transparent 40%),
        radial-gradient(circle at 85% 25%, rgba(139, 92, 246, 0.16), transparent 45%),
        radial-gradient(circle at 50% 75%, rgba(236, 72, 153, 0.1), transparent 50%);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      min-height: 100vh;
    }

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

    ul, ol {
      list-style: none;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(12, 8, 20, 0.88);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(236, 72, 153, 0.2);
    }

    .header-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;
      object-fit: contain;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      background: linear-gradient(135deg, #fff, #f472b6);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: 0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-item {
      display: inline-block;
      padding: 10px 14px;
      font-size: 0.92rem;
      color: var(--text-muted);
      white-space: nowrap;
      border-radius: var(--radius-sm);
    }

    .nav-item:hover, .nav-item.active {
      color: #fff;
      background: rgba(236, 72, 153, 0.15);
      text-shadow: 0 0 8px var(--glow-pink);
    }

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

    .btn-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      border-radius: 9999px;
      font-size: 0.88rem;
      font-weight: 600;
      background: linear-gradient(135deg, #ec4899, #8b5cf6);
      color: #ffffff;
      box-shadow: 0 0 16px var(--glow-pink);
      border: 1px solid rgba(255, 255, 255, 0.3);
    }

    .btn-portal:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 24px rgba(236, 72, 153, 0.7);
      color: #ffffff;
    }

    .nav-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-size: 1rem;
    }

    /* 首屏 Hero（严禁出现图片） */
    .hero-section {
      padding: 80px 0 60px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid rgba(139, 92, 246, 0.2);
    }

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

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(236, 72, 153, 0.12);
      border: 1px solid var(--border-color);
      border-radius: 9999px;
      font-size: 0.86rem;
      color: #f472b6;
      margin-bottom: 24px;
      box-shadow: 0 0 14px rgba(236, 72, 153, 0.25);
    }

    .hero-title {
      font-size: clamp(1.85rem, 4vw, 2.75rem);
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
      color: #ffffff;
      text-shadow: 0 0 30px rgba(236, 72, 153, 0.4);
    }

    .hero-title span {
      background: linear-gradient(135deg, #f472b6, #c084fc, #38bdf8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: clamp(1rem, 1.8vw, 1.18rem);
      color: var(--text-muted);
      line-height: 1.8;
      max-width: 820px;
      margin: 0 auto 36px;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .btn-main-action {
      padding: 14px 34px;
      border-radius: 9999px;
      font-size: 1.05rem;
      font-weight: 700;
      background: linear-gradient(135deg, #f43f5e, #ec4899 40%, #8b5cf6 100%);
      color: #fff;
      box-shadow: 0 0 25px rgba(236, 72, 153, 0.65);
      border: 1px solid rgba(255, 255, 255, 0.35);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-main-action:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 0 35px rgba(236, 72, 153, 0.85);
      color: #ffffff;
    }

    .btn-sub-action {
      padding: 14px 28px;
      border-radius: 9999px;
      font-size: 1rem;
      font-weight: 600;
      background: rgba(30, 19, 53, 0.8);
      color: var(--text-main);
      border: 1px solid var(--border-color);
      backdrop-filter: blur(8px);
    }

    .btn-sub-action:hover {
      border-color: var(--primary-purple);
      background: rgba(45, 26, 80, 0.9);
      box-shadow: 0 0 16px var(--glow-purple);
    }

    /* 纯代码科技数据指标组件 */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 10px;
    }

    .stat-box {
      background: linear-gradient(145deg, rgba(30, 19, 53, 0.85), rgba(18, 12, 34, 0.85));
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px 16px;
      text-align: center;
      position: relative;
      overflow: hidden;
      backdrop-filter: blur(8px);
    }

    .stat-box::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(90deg, transparent, #ec4899, #8b5cf6, transparent);
    }

    .stat-num {
      font-size: 1.85rem;
      font-weight: 800;
      color: #f472b6;
      line-height: 1.2;
      margin-bottom: 6px;
      font-family: monospace, sans-serif;
      text-shadow: 0 0 12px rgba(244, 114, 182, 0.5);
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-dim);
    }

    /* 通用Section结构 */
    .section-block {
      padding: 80px 0;
      position: relative;
    }

    .section-block:nth-child(even) {
      background: rgba(18, 12, 34, 0.5);
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px;
    }

    .section-tag {
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 1.5px;
      color: #ec4899;
      text-transform: uppercase;
      margin-bottom: 10px;
      display: block;
    }

    .section-title {
      font-size: clamp(1.6rem, 3vw, 2.25rem);
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
      line-height: 1.35;
    }

    .section-desc {
      font-size: 0.98rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 通用卡片与网格 */
    .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: 30px;
    }

    .cyber-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      position: relative;
      transition: var(--transition-smooth);
      backdrop-filter: blur(10px);
    }

    .cyber-card:hover {
      border-color: var(--border-hover);
      transform: translateY(-4px);
      box-shadow: 0 10px 30px -10px var(--glow-pink);
    }

    .card-icon-pill {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(236, 72, 153, 0.25), rgba(139, 92, 246, 0.25));
      border: 1px solid var(--border-color);
      color: #f472b6;
      font-size: 1.25rem;
      margin-bottom: 18px;
    }

    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 平台矩阵芯片墙 */
    .model-chip-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-chip {
      padding: 7px 16px;
      background: rgba(26, 16, 45, 0.8);
      border: 1px solid rgba(139, 92, 246, 0.3);
      border-radius: 9999px;
      font-size: 0.85rem;
      color: #e2e8f0;
      transition: var(--transition-smooth);
    }

    .model-chip:hover {
      border-color: #ec4899;
      color: #fff;
      background: rgba(236, 72, 153, 0.2);
      box-shadow: 0 0 10px var(--glow-pink);
    }

    /* 宣传图/素材图展示区域 */
    .media-showcase-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 36px;
    }

    .media-card {
      background: var(--bg-surface-elevated);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    }

    .media-card img {
      width: 100%;
      height: 260px;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

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

    .media-content {
      padding: 20px;
    }

    .media-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 8px;
    }

    .media-text {
      font-size: 0.88rem;
      color: var(--text-dim);
    }

    /* 对比评测高亮板块 */
    .rating-hero-panel {
      background: linear-gradient(135deg, rgba(236, 72, 153, 0.15), rgba(139, 92, 246, 0.2));
      border: 1px solid rgba(236, 72, 153, 0.4);
      border-radius: var(--radius-lg);
      padding: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 40px;
      box-shadow: 0 0 30px rgba(236, 72, 153, 0.2);
    }

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

    .score-big {
      font-size: 3.8rem;
      font-weight: 900;
      color: #f472b6;
      line-height: 1;
      text-shadow: 0 0 20px rgba(244, 114, 182, 0.7);
    }

    .score-total {
      font-size: 1.4rem;
      color: var(--text-dim);
    }

    .stars-line {
      color: #fbbf24;
      font-size: 1.25rem;
      margin-top: 6px;
    }

    .eval-table-container {
      overflow-x: auto;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background: var(--bg-surface);
    }

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

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(236, 72, 153, 0.15);
    }

    .eval-table th {
      background: rgba(30, 19, 53, 0.9);
      color: #ffffff;
      font-weight: 700;
    }

    .eval-table tr:hover td {
      background: rgba(236, 72, 153, 0.06);
    }

    .highlight-col {
      color: #f472b6;
      font-weight: 600;
    }

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

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

    .step-badge {
      display: inline-block;
      padding: 4px 10px;
      background: linear-gradient(135deg, #ec4899, #8b5cf6);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      border-radius: 9999px;
      margin-bottom: 14px;
    }

    /* 用户评论卡片 */
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
      padding-top: 16px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ec4899, #8b5cf6);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #ffffff;
      font-size: 0.9rem;
    }

    /* FAQ 折叠组件 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition-smooth);
    }

    .faq-header {
      padding: 20px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      user-select: none;
      font-weight: 600;
      color: #fff;
    }

    .faq-header:hover {
      background: rgba(236, 72, 153, 0.08);
    }

    .faq-icon {
      font-size: 1.25rem;
      color: #ec4899;
      transition: transform 0.3s ease;
    }

    .faq-body {
      display: none;
      padding: 0 24px 20px;
      color: var(--text-muted);
      font-size: 0.93rem;
      line-height: 1.75;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .faq-item.active {
      border-color: var(--border-hover);
      box-shadow: 0 0 16px rgba(236, 72, 153, 0.2);
    }

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

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

    /* 表单组件 */
    .form-wrapper {
      max-width: 740px;
      margin: 0 auto;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px 36px;
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      margin-bottom: 18px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-bottom: 18px;
    }

    .form-label {
      font-size: 0.88rem;
      font-weight: 600;
      color: #e2e8f0;
    }

    .form-control {
      width: 100%;
      background: rgba(14, 9, 24, 0.8);
      border: 1px solid rgba(139, 92, 246, 0.3);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      color: #ffffff;
      font-size: 0.92rem;
      outline: none;
      transition: var(--transition-smooth);
    }

    .form-control:focus {
      border-color: #ec4899;
      box-shadow: 0 0 12px var(--glow-pink);
    }

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

    .btn-submit {
      width: 100%;
      padding: 14px;
      border-radius: var(--radius-sm);
      font-size: 1.02rem;
      font-weight: 700;
      background: linear-gradient(135deg, #ec4899, #8b5cf6);
      color: #fff;
      border: none;
      cursor: pointer;
      box-shadow: 0 0 20px var(--glow-pink);
      transition: var(--transition-smooth);
    }

    .btn-submit:hover {
      box-shadow: 0 0 30px rgba(236, 72, 153, 0.8);
      transform: translateY(-2px);
    }

    /* 行业资讯 & 最新文章 */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .article-item-card {
      background: rgba(26, 16, 45, 0.6);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 18px 16px;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .article-item-card:hover {
      border-color: #ec4899;
      background: rgba(45, 26, 80, 0.7);
    }

    .article-tag {
      font-size: 0.75rem;
      color: #ec4899;
      padding: 2px 8px;
      background: rgba(236, 72, 153, 0.15);
      border-radius: 4px;
      white-space: nowrap;
    }

    /* 联系我们与二维码 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }

    .qr-card {
      background: rgba(26, 16, 45, 0.7);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }

    .qr-card img {
      width: 180px;
      height: 180px;
      border-radius: var(--radius-sm);
      border: 2px solid rgba(236, 72, 153, 0.5);
      box-shadow: 0 0 20px rgba(236, 72, 153, 0.35);
      margin-bottom: 16px;
      object-fit: cover;
    }

    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .contact-info-item {
      display: flex;
      align-items: center;
      gap: 16px;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 16px 20px;
    }

    .contact-icon {
      font-size: 1.4rem;
      color: #ec4899;
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #08050e;
      border-top: 1px solid rgba(236, 72, 153, 0.2);
      padding: 60px 0 30px;
      color: var(--text-dim);
      font-size: 0.88rem;
    }

    .footer-links-row {
      display: flex;
      flex-wrap: wrap;
      gap: 14px 24px;
      margin-bottom: 30px;
      padding-bottom: 24px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      justify-content: center;
    }

    .footer-links-row a {
      color: var(--text-muted);
    }

    .footer-links-row a:hover {
      color: #f472b6;
      text-shadow: 0 0 8px var(--glow-pink);
    }

    .footer-bottom {
      text-align: center;
      line-height: 1.8;
    }

    /* 浮动客服入口与返回顶部 */
    .floating-actions {
      position: fixed;
      right: 24px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ec4899, #8b5cf6);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid rgba(255, 255, 255, 0.3);
      box-shadow: 0 0 16px var(--glow-pink);
      cursor: pointer;
      transition: var(--transition-smooth);
      font-size: 1.1rem;
    }

    .float-btn:hover {
      transform: scale(1.08);
      box-shadow: 0 0 24px rgba(236, 72, 153, 0.8);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-showcase-wrap {
        grid-template-columns: 1fr;
      }
      .rating-hero-panel {
        flex-direction: column;
        text-align: center;
        gap: 20px;
      }
      .score-badge {
        justify-content: center;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #100a1c;
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border-color);
        gap: 0;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-item {
        width: 100%;
        padding: 12px 16px;
      }
      .nav-toggle {
        display: block;
      }
    }

    @media (max-width: 640px) {
      .grid-3, .grid-4, .grid-2, .hero-stats-grid, .process-steps, .contact-grid, .article-links-grid {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .form-wrapper {
        padding: 24px 18px;
      }
      .hero-section {
        padding: 60px 0 40px;
      }
      .section-block {
        padding: 60px 0;
      }
    }