:root {
      --bg-dark: #0b0716;
      --bg-card: #150f2a;
      --bg-card-alt: #1c133a;
      --border-glow: rgba(235, 64, 255, 0.28);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --primary-pink: #ff2d87;
      --primary-purple: #9d3bf6;
      --primary-cyan: #00f0ff;
      --text-main: #f3effc;
      --text-muted: #a69bb8;
      --text-sub: #7a6e92;
      --gradient-brand: linear-gradient(135deg, #ff2d87 0%, #9d3bf6 50%, #00f0ff 100%);
      --container-max: 1240px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
      background-image: radial-gradient(circle at 50% 0%, rgba(157, 59, 246, 0.18) 0%, transparent 70%),
                        radial-gradient(circle at 90% 40%, rgba(255, 45, 135, 0.12) 0%, transparent 60%);
      background-attachment: fixed;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.3s ease;
    }
    .site-wrapper {
      width: 100%;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 7, 22, 0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-subtle);
      width: 100%;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-box img.ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      background: linear-gradient(90deg, #fff, #e4a7ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    nav.main-nav {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      font-size: 0.95rem;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: 6px;
      display: inline-block;
    }
    .nav-links li a:hover,
    .nav-links li a.ai-page-home-link {
      color: #fff;
      text-shadow: 0 0 10px rgba(255, 45, 135, 0.6);
    }
    .nav-cta-btn {
      background: var(--gradient-brand);
      color: #fff !important;
      padding: 8px 20px !important;
      border-radius: 99px !important;
      font-weight: 600;
      box-shadow: 0 4px 15px rgba(255, 45, 135, 0.4);
      margin-left: 12px;
    }
    .nav-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 45, 135, 0.6);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-glow);
      color: #fff;
      padding: 6px 12px;
      border-radius: 6px;
      cursor: pointer;
    }
    main {
      flex: 1;
      width: 100%;
    }
    .hero-section {
      padding: 100px 0 80px;
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 45, 135, 0.12);
      border: 1px solid var(--border-glow);
      padding: 6px 18px;
      border-radius: 99px;
      color: #ff7bc1;
      font-size: 0.9rem;
      font-weight: 500;
      margin-bottom: 24px;
    }
    .hero-badge span {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary-pink);
      box-shadow: 0 0 8px var(--primary-pink);
    }
    h1.hero-title {
      font-size: clamp(2rem, 5vw, 3.2rem);
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
      color: #ffffff;
      text-shadow: 0 2px 20px rgba(157, 59, 246, 0.3);
    }
    .hero-desc {
      font-size: clamp(1rem, 2vw, 1.2rem);
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 40px;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 18px;
      margin-bottom: 60px;
    }
    .btn-main {
      background: var(--gradient-brand);
      color: #fff;
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 600;
      border-radius: 99px;
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 6px 25px rgba(255, 45, 135, 0.45);
    }
    .btn-main:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(255, 45, 135, 0.65);
    }
    .btn-outline {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-glow);
      color: #fff;
      padding: 14px 30px;
      font-size: 1.05rem;
      font-weight: 500;
      border-radius: 99px;
      cursor: pointer;
    }
    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: #ff2d87;
    }
    .stats-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: rgba(21, 15, 42, 0.75);
      border: 1px solid var(--border-glow);
      border-radius: 18px;
      padding: 28px 24px;
      margin-top: 10px;
    }
    .stat-item h3 {
      font-size: 1.8rem;
      font-weight: 700;
      color: #00f0ff;
      margin-bottom: 4px;
    }
    .stat-item p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .section-block {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }
    .section-tag {
      font-size: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 2px;
      color: var(--primary-pink);
      font-weight: 700;
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 14px;
    }
    .section-intro {
      font-size: 1rem;
      color: var(--text-muted);
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 14px;
      padding: 28px 22px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .feature-card:hover {
      border-color: var(--primary-pink);
      transform: translateY(-4px);
      box-shadow: 0 10px 30px rgba(157, 59, 246, 0.2);
    }
    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(255, 45, 135, 0.15);
      border: 1px solid rgba(255, 45, 135, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      margin-bottom: 16px;
      color: #00f0ff;
    }
    .feature-card h3 {
      font-size: 1.18rem;
      color: #fff;
      margin-bottom: 10px;
      font-weight: 600;
    }
    .feature-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }
    .model-tag {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-subtle);
      color: #e2d9f3;
      padding: 8px 16px;
      border-radius: 8px;
      font-size: 0.88rem;
      font-weight: 500;
      transition: 0.3s;
    }
    .model-tag:hover {
      border-color: var(--primary-cyan);
      color: var(--primary-cyan);
    }
    .eval-box {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 16px;
      padding: 32px;
      margin-bottom: 40px;
    }
    .eval-score-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-subtle);
      padding-bottom: 24px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .score-num {
      font-size: 3rem;
      font-weight: 800;
      background: var(--gradient-brand);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1;
    }
    .score-stars {
      color: #ffd200;
      font-size: 1.2rem;
    }
    .eval-table-wrap {
      width: 100%;
      overflow-x: auto;
    }
    table.eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    table.eval-table th,
    table.eval-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-subtle);
      font-size: 0.92rem;
    }
    table.eval-table th {
      color: var(--text-muted);
      font-weight: 600;
      background: rgba(255, 255, 255, 0.02);
    }
    table.eval-table td.highlight {
      color: #00f0ff;
      font-weight: 600;
    }
    .media-card-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 30px;
    }
    .media-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 14px;
      overflow: hidden;
    }
    .media-img-holder {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #090513;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    .media-img-holder.square-ratio {
      aspect-ratio: 1 / 1;
      max-height: 380px;
    }
    .media-img-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .media-body {
      padding: 20px;
    }
    .media-body h4 {
      font-size: 1.1rem;
      color: #fff;
      margin-bottom: 6px;
    }
    .media-body p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .flow-step-item {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 12px;
      padding: 24px 20px;
      position: relative;
    }
    .step-number {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary-pink);
      margin-bottom: 12px;
    }
    .flow-step-item h4 {
      font-size: 1.05rem;
      color: #fff;
      margin-bottom: 8px;
    }
    .flow-step-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 14px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-card p {
      font-size: 0.92rem;
      color: #d1c8e2;
      margin-bottom: 16px;
      line-height: 1.6;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 14px;
    }
    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--gradient-brand);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
      font-size: 0.9rem;
    }
    .reviewer-name {
      font-size: 0.95rem;
      color: #fff;
      font-weight: 600;
    }
    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .faq-accordion {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 10px;
      overflow: hidden;
      transition: 0.3s;
    }
    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 600;
      color: #f1edfa;
      font-size: 1rem;
      user-select: none;
    }
    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s;
      color: var(--primary-pink);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
      background: rgba(11, 7, 22, 0.4);
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-item.active .faq-answer {
      padding: 16px 24px 20px;
      max-height: 300px;
    }
    .form-box {
      max-width: 760px;
      margin: 0 auto;
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 16px;
      padding: 36px 30px;
    }
    .form-group {
      margin-bottom: 20px;
      text-align: left;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      background: rgba(11, 7, 22, 0.8);
      border: 1px solid var(--border-subtle);
      border-radius: 8px;
      color: #fff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.3s;
    }
    .form-control:focus {
      border-color: var(--primary-pink);
    }
    select.form-control {
      cursor: pointer;
    }
    select.form-control option {
      background: var(--bg-dark);
      color: #fff;
    }
    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }
    .article-links-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 24px;
    }
    .article-pill {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-subtle);
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .article-pill:hover {
      color: #00f0ff;
      border-color: #00f0ff;
    }
    .banners-container {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
      margin-top: 40px;
    }
    .banner-slot {
      max-width: 32%;
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid var(--border-subtle);
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }
    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .contact-item-row {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 0.95rem;
      color: #d8cfea;
    }
    .qr-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 12px;
      padding: 24px;
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
      text-align: center;
    }
    .qr-card img {
      width: 140px;
      height: 140px;
      display: block;
      border-radius: 8px;
    }
    footer.site-footer {
      background: #07040f;
      border-top: 1px solid var(--border-subtle);
      padding: 60px 0 30px;
      width: 100%;
      margin-top: 40px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 1.05rem;
      color: #fff;
      margin-bottom: 16px;
      font-weight: 600;
    }
    .footer-col p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links-list li a {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .footer-links-list li a:hover {
      color: #ff2d87;
    }
    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      margin-top: 20px;
    }
    .friend-links-wrap a {
      font-size: 0.85rem;
      color: var(--text-sub);
    }
    .friend-links-wrap a:hover {
      color: #00f0ff;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.82rem;
      color: var(--text-sub);
      flex-wrap: wrap;
      gap: 12px;
    }
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--gradient-brand);
      color: #fff;
      padding: 12px 18px;
      border-radius: 99px;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      font-weight: 600;
      box-shadow: 0 4px 20px rgba(255, 45, 135, 0.5);
      cursor: pointer;
    }
    .floating-kefu:hover {
      transform: translateY(-2px);
    }
    @media (max-width: 992px) {
      .grid-3, .grid-4, .reviews-grid, .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-card-grid {
        grid-template-columns: 1fr;
      }
      .stats-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
    }
    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      nav.main-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(11, 7, 22, 0.98);
        border-bottom: 1px solid var(--border-glow);
        padding: 20px;
      }
      nav.main-nav.show {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .nav-cta-btn {
        margin-left: 0;
        margin-top: 10px;
        display: inline-block;
      }
      .grid-3, .grid-4, .reviews-grid, .flow-steps, .stats-strip, .contact-grid {
        grid-template-columns: 1fr;
      }
      .banner-slot {
        max-width: 100%;
      }
    }