:root {
      --bg-base: #0b0514;
      --bg-surface: #140924;
      --bg-card: #1c0e33;
      --bg-card-hover: #261345;
      --neon-pink: #ff2a8d;
      --neon-purple: #9d4edd;
      --neon-cyan: #00f0ff;
      --text-main: #f8f6fc;
      --text-muted: #b8a9cf;
      --text-sub: #8775a6;
      --border-color: rgba(255, 42, 141, 0.2);
      --border-glow: rgba(157, 78, 221, 0.4);
      --gradient-brand: linear-gradient(135deg, #ff2a8d 0%, #9d4edd 100%);
      --gradient-card: linear-gradient(180deg, rgba(28, 14, 51, 0.8) 0%, rgba(20, 9, 36, 0.95) 100%);
      --container-max: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--bg-base);
      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;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.3s ease;
    }

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 5, 20, 0.9);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-inner {
      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: 40px;
      width: auto;
      object-fit: contain;
    }

    .brand-title-badge {
      font-size: 1.25rem;
      font-weight: 800;
      color: #fff;
      letter-spacing: 0.5px;
    }

    .brand-title-badge span {
      color: var(--neon-pink);
    }

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      color: var(--text-muted);
      font-size: 0.95rem;
      font-weight: 500;
      border-radius: 6px;
    }

    .nav-links li a:hover {
      color: #fff;
      background: rgba(255, 42, 141, 0.15);
      text-shadow: 0 0 8px var(--neon-pink);
    }

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

    .btn-nav-primary {
      padding: 8px 18px;
      border-radius: 6px;
      font-size: 0.9rem;
      font-weight: 600;
      background: var(--gradient-brand);
      color: #fff;
      box-shadow: 0 0 15px rgba(255, 42, 141, 0.4);
    }

    .btn-nav-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 0 20px rgba(255, 42, 141, 0.7);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      color: #fff;
      padding: 6px 10px;
      border-radius: 4px;
      cursor: pointer;
    }

    .hero-section {
      position: relative;
      padding: 90px 0 70px;
      background: radial-gradient(circle at 50% 20%, rgba(157, 78, 221, 0.18) 0%, rgba(11, 5, 20, 1) 70%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 999px;
      background: rgba(255, 42, 141, 0.1);
      border: 1px solid rgba(255, 42, 141, 0.3);
      color: var(--neon-pink);
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 24px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .hero-title {
      font-size: 2.75rem;
      line-height: 1.25;
      font-weight: 900;
      color: #fff;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: linear-gradient(90deg, #ff2a8d, #00f0ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      max-width: 800px;
      margin: 0 auto 36px;
      color: var(--text-muted);
      font-size: 1.15rem;
      line-height: 1.7;
    }

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

    .btn-hero-official {
      padding: 14px 34px;
      border-radius: 8px;
      background: var(--gradient-brand);
      color: #fff;
      font-size: 1.1rem;
      font-weight: 700;
      box-shadow: 0 0 25px rgba(255, 42, 141, 0.5);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .btn-hero-official:hover {
      box-shadow: 0 0 35px rgba(255, 42, 141, 0.8);
      transform: translateY(-2px);
    }

    .btn-hero-secondary {
      padding: 14px 28px;
      border-radius: 8px;
      background: rgba(28, 14, 51, 0.8);
      border: 1px solid var(--border-glow);
      color: #fff;
      font-size: 1rem;
      font-weight: 600;
    }

    .btn-hero-secondary:hover {
      background: rgba(40, 20, 70, 0.9);
      border-color: var(--neon-cyan);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 980px;
      margin: 0 auto;
      text-align: left;
    }

    .stat-card {
      background: var(--gradient-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 20px;
      position: relative;
    }

    .stat-card:hover {
      border-color: var(--neon-pink);
    }

    .stat-value {
      font-size: 1.85rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 4px;
    }

    .stat-value span {
      color: var(--neon-cyan);
      font-size: 1.2rem;
    }

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

    .section-wrap {
      padding: 80px 0;
      border-bottom: 1px solid rgba(255, 42, 141, 0.1);
    }

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

    .section-tag {
      color: var(--neon-cyan);
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
    }

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

    .matrix-chips-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 30px;
    }

    .matrix-chip {
      background: rgba(30, 15, 55, 0.7);
      border: 1px solid rgba(157, 78, 221, 0.3);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .matrix-chip.highlight {
      border-color: var(--neon-pink);
      color: #fff;
      background: rgba(255, 42, 141, 0.15);
    }

    .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-card {
      background: var(--gradient-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 28px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      border-color: var(--neon-pink);
      box-shadow: 0 10px 25px rgba(255, 42, 141, 0.15);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(255, 42, 141, 0.15);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--neon-pink);
      font-size: 1.4rem;
      margin-bottom: 20px;
      font-weight: 900;
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }

    .card-text {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .card-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: auto;
    }

    .tag-item {
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 4px;
      background: rgba(157, 78, 221, 0.15);
      color: #dfccf5;
    }

    .media-card {
      background: var(--gradient-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .media-thumb-wrap {
      width: 100%;
      position: relative;
      background: #000;
      overflow: hidden;
      aspect-ratio: 16 / 9;
    }

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

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

    .media-card:hover .media-thumb-wrap img {
      transform: scale(1.04);
    }

    .media-body {
      padding: 20px;
    }

    .gallery-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 30px;
    }

    .gallery-item {
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #000;
      aspect-ratio: 16 / 10;
    }

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

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

    .step-box {
      background: var(--gradient-card);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 24px;
      position: relative;
    }

    .step-number {
      position: absolute;
      top: -12px;
      left: 20px;
      background: var(--neon-pink);
      color: #fff;
      font-size: 0.8rem;
      font-weight: 800;
      padding: 2px 10px;
      border-radius: 999px;
      box-shadow: 0 0 10px var(--neon-pink);
    }

    .step-heading {
      color: #fff;
      font-size: 1.1rem;
      font-weight: 700;
      margin-top: 8px;
      margin-bottom: 8px;
    }

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

    .eval-highlight-box {
      background: linear-gradient(135deg, rgba(255, 42, 141, 0.15) 0%, rgba(157, 78, 221, 0.15) 100%);
      border: 1px solid var(--neon-pink);
      border-radius: 12px;
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-area {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-circle {
      font-size: 2.8rem;
      font-weight: 900;
      color: #fff;
      background: var(--gradient-brand);
      padding: 10px 24px;
      border-radius: 12px;
      box-shadow: 0 0 20px rgba(255, 42, 141, 0.5);
    }

    .score-detail h3 {
      font-size: 1.4rem;
      color: #fff;
      margin-bottom: 4px;
    }

    .score-stars {
      color: #ffd166;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: var(--gradient-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
    }

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

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 42, 141, 0.1);
      font-size: 0.95rem;
    }

    .compare-table th {
      background: rgba(30, 15, 55, 0.9);
      color: #fff;
      font-weight: 700;
    }

    .compare-table tr:hover {
      background: rgba(255, 42, 141, 0.05);
    }

    .highlight-col {
      color: #fff;
      font-weight: 600;
      background: rgba(255, 42, 141, 0.08);
      border-left: 1px solid var(--border-color);
      border-right: 1px solid var(--border-color);
    }

    .badge-win {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      background: var(--neon-pink);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      margin-left: 6px;
    }

    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: var(--gradient-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--gradient-brand);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .reviewer-meta h4 {
      font-size: 1rem;
      color: #fff;
    }

    .reviewer-meta span {
      font-size: 0.8rem;
      color: var(--neon-cyan);
    }

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

    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--gradient-card);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
    }

    .faq-trigger {
      width: 100%;
      text-align: left;
      padding: 18px 20px;
      background: none;
      border: none;
      color: #fff;
      font-size: 1rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-trigger:hover {
      color: var(--neon-pink);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--neon-pink);
    }

    .faq-content {
      padding: 0 20px 18px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
      display: none;
      border-top: 1px solid rgba(255, 42, 141, 0.08);
    }

    .faq-item.active .faq-content {
      display: block;
      padding-top: 14px;
    }

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

    .form-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: var(--gradient-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
    }

    .contact-info-block {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .contact-detail-row {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }

    .contact-icon {
      color: var(--neon-pink);
      font-size: 1.2rem;
      margin-top: 2px;
    }

    .contact-qr-box {
      margin-top: 10px;
      padding: 16px;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      background: rgba(15, 6, 28, 0.8);
      display: inline-block;
      max-width: 200px;
      text-align: center;
    }

    .contact-qr-box img {
      max-width: 100%;
      height: auto;
      border-radius: 6px;
      display: block;
      margin: 0 auto 8px;
    }

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

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

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      background: rgba(15, 7, 28, 0.9);
      color: #fff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.3s;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--neon-pink);
      box-shadow: 0 0 10px rgba(255, 42, 141, 0.3);
    }

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

    .btn-form-submit {
      width: 100%;
      padding: 14px;
      border-radius: 8px;
      background: var(--gradient-brand);
      color: #fff;
      font-weight: 700;
      font-size: 1rem;
      border: none;
      cursor: pointer;
      box-shadow: 0 0 20px rgba(255, 42, 141, 0.5);
    }

    .btn-form-submit:hover {
      box-shadow: 0 0 30px rgba(255, 42, 141, 0.8);
      transform: translateY(-1px);
    }

    .articles-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 14px;
      margin-top: 20px;
    }

    .article-item-card {
      background: var(--gradient-card);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 14px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-item-card:hover {
      border-color: var(--neon-cyan);
    }

    .article-item-title {
      font-size: 0.9rem;
      font-weight: 600;
      color: #fff;
      line-height: 1.4;
      margin-bottom: 8px;
    }

    .article-link-anchor {
      font-size: 0.8rem;
      color: var(--neon-pink);
    }

    .footer-section {
      background: #080310;
      border-top: 1px solid rgba(255, 42, 141, 0.2);
      padding: 50px 0 30px;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

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

    .footer-col h4 {
      color: #fff;
      font-size: 1rem;
      margin-bottom: 16px;
      font-weight: 700;
    }

    .footer-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-nav-list li a:hover {
      color: var(--neon-pink);
    }

    .friend-links-area {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 20px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      font-size: 0.85rem;
    }

    .friend-links-area a {
      color: var(--text-sub);
    }

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

    .copyright-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: var(--text-sub);
    }

    .fixed-floating-bar {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
      cursor: pointer;
    }

    .floating-btn:hover {
      border-color: var(--neon-pink);
      color: var(--neon-pink);
    }

    @media (max-width: 992px) {
      .grid-4, .hero-stats-grid, .timeline-steps, .gallery-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .review-grid, .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .form-layout {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-title {
        font-size: 2.1rem;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--bg-surface);
        border-bottom: 1px solid var(--border-color);
        padding: 16px 0;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li a {
        padding: 12px 24px;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .grid-2, .grid-3, .grid-4, .hero-stats-grid, .timeline-steps, .review-grid, .gallery-strip, .articles-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.75rem;
      }
      .hero-section {
        padding: 50px 0 40px;
      }
    }