:root {
      --bg-main: #0c0716;
      --bg-card: rgba(22, 14, 42, 0.75);
      --bg-card-hover: rgba(36, 21, 68, 0.9);
      --accent-pink: #ff2a8d;
      --accent-purple: #9d4edd;
      --accent-cyan: #00f0ff;
      --text-main: #ffffff;
      --text-sub: #d0c8e8;
      --text-muted: #8d81a8;
      --border-glow: rgba(255, 42, 141, 0.35);
      --border-soft: rgba(157, 78, 221, 0.25);
      --shadow-glow: 0 0 25px rgba(255, 42, 141, 0.25);
      --max-w: 1200px;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      background-color: var(--bg-main);
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(157, 78, 221, 0.18) 0%, transparent 40%),
        radial-gradient(circle at 85% 35%, rgba(255, 42, 141, 0.16) 0%, transparent 45%),
        radial-gradient(circle at 50% 80%, rgba(0, 240, 255, 0.12) 0%, transparent 50%);
      background-attachment: fixed;
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }
    .container {
      width: 100%;
      max-width: var(--max-w);
      margin: 0 auto;
      padding: 0 20px;
    }
    a { color: inherit; text-decoration: none; transition: color 0.3s ease; }
    ul { list-style: none; }
    
    /* Header */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(12, 7, 22, 0.9);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-soft);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
      filter: drop-shadow(0 0 8px rgba(255, 42, 141, 0.6));
    }
    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 1px;
      color: #fff;
      text-shadow: 0 0 10px rgba(255, 42, 141, 0.5);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-links a {
      padding: 8px 12px;
      font-size: 0.92rem;
      color: var(--text-sub);
      white-space: nowrap;
      position: relative;
    }
    .nav-links a:hover {
      color: #fff;
      text-shadow: 0 0 8px var(--accent-pink);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-nav-primary {
      padding: 8px 18px;
      background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
      color: #fff;
      font-weight: 600;
      font-size: 0.9rem;
      border-radius: 6px;
      box-shadow: 0 0 15px rgba(255, 42, 141, 0.4);
      transition: all 0.3s ease;
    }
    .btn-nav-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 22px rgba(255, 42, 141, 0.7);
    }
    .nav-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-glow);
      color: #fff;
      font-size: 1.2rem;
      padding: 6px 10px;
      border-radius: 4px;
      cursor: pointer;
    }

    /* Common Section Styles */
    section {
      padding: 70px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      margin-bottom: 45px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 20px;
      background: rgba(255, 42, 141, 0.15);
      border: 1px solid var(--border-glow);
      color: var(--accent-pink);
      font-size: 0.82rem;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      margin-bottom: 12px;
      font-weight: 600;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #ffffff;
      text-shadow: 0 0 18px rgba(157, 78, 221, 0.4);
      margin-bottom: 12px;
    }
    .section-desc {
      color: var(--text-sub);
      font-size: 1rem;
      max-width: 720px;
      margin: 0 auto;
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      padding: 90px 0 70px;
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 42, 141, 0.12);
      border: 1px solid var(--accent-pink);
      padding: 6px 18px;
      border-radius: 30px;
      color: #fff;
      font-size: 0.9rem;
      margin-bottom: 24px;
      box-shadow: 0 0 15px rgba(255, 42, 141, 0.3);
    }
    .hero-badge span {
      display: inline-block;
      width: 8px;
      height: 8px;
      background: var(--accent-pink);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-pink);
    }
    .hero-title {
      font-size: 2.5rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      color: #ffffff;
      text-shadow: 0 0 25px rgba(255, 42, 141, 0.5), 0 0 50px rgba(157, 78, 221, 0.3);
    }
    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-sub);
      max-width: 800px;
      margin: 0 auto 35px;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }
    .btn-hero-main {
      padding: 14px 36px;
      background: linear-gradient(135deg, #ff2a8d 0%, #9d4edd 100%);
      color: #ffffff;
      font-weight: 700;
      font-size: 1.05rem;
      border-radius: 8px;
      border: none;
      box-shadow: 0 0 25px rgba(255, 42, 141, 0.55);
      cursor: pointer;
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    .btn-hero-main:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 0 35px rgba(255, 42, 141, 0.85);
    }
    .btn-hero-sub {
      padding: 14px 32px;
      background: rgba(22, 14, 42, 0.85);
      color: #ffffff;
      font-weight: 600;
      font-size: 1.05rem;
      border-radius: 8px;
      border: 1px solid var(--accent-purple);
      cursor: pointer;
      transition: all 0.3s ease;
    }
    .btn-hero-sub:hover {
      background: rgba(45, 23, 85, 0.95);
      border-color: var(--accent-pink);
      transform: translateY(-3px);
    }
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 980px;
      margin: 0 auto;
    }
    .hero-stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      padding: 22px 16px;
      border-radius: 12px;
      text-align: center;
      backdrop-filter: blur(10px);
      transition: border-color 0.3s, transform 0.3s;
    }
    .hero-stat-card:hover {
      border-color: var(--accent-pink);
      transform: translateY(-4px);
    }
    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: #00f0ff;
      text-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
      margin-bottom: 6px;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--text-sub);
    }

    /* Platform Grid & Tags */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 30px;
    }
    .model-chip {
      background: rgba(30, 18, 56, 0.85);
      border: 1px solid var(--border-soft);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.82rem;
      color: var(--text-sub);
      transition: all 0.25s ease;
    }
    .model-chip:hover {
      border-color: var(--accent-pink);
      color: #fff;
      box-shadow: 0 0 10px rgba(255, 42, 141, 0.4);
      transform: translateY(-2px);
    }

    /* Cards & Grids */
    .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;
    }
    .cyber-card {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: 12px;
      padding: 24px;
      backdrop-filter: blur(8px);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .cyber-card:hover {
      border-color: var(--accent-pink);
      background: var(--bg-card-hover);
      transform: translateY(-4px);
      box-shadow: var(--shadow-glow);
    }
    .card-icon {
      font-size: 1.8rem;
      color: var(--accent-pink);
      margin-bottom: 14px;
      display: inline-block;
    }
    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }
    .card-desc {
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.55;
      flex-grow: 1;
    }

    /* Comparison Table */
    .table-container {
      overflow-x: auto;
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: 12px;
      padding: 10px;
    }
    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    table.compare-table th, table.compare-table td {
      padding: 14px 18px;
      border-bottom: 1px solid rgba(157, 78, 221, 0.2);
      font-size: 0.95rem;
    }
    table.compare-table th {
      color: #fff;
      background: rgba(30, 18, 56, 0.9);
      font-weight: 700;
    }
    table.compare-table td {
      color: var(--text-sub);
    }
    .highlight-col {
      background: rgba(255, 42, 141, 0.08);
      color: #fff;
      font-weight: 600;
      border-left: 1px solid var(--border-glow);
      border-right: 1px solid var(--border-glow);
    }
    .score-badge {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 6px;
      background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
      color: #fff;
      font-weight: bold;
      font-size: 0.85rem;
    }

    /* Media Library Display (After Hero) */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-top: 30px;
    }
    .media-box {
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-soft);
      background: #000;
    }
    .media-box img {
      width: 100%;
      height: 240px;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-box:hover img {
      transform: scale(1.04);
    }
    .media-info {
      padding: 14px 18px;
      background: var(--bg-card);
    }
    .media-title {
      font-size: 1.05rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 4px;
    }
    .media-caption {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* Steps */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      padding: 24px 20px;
      border-radius: 12px;
      position: relative;
    }
    .step-num {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--accent-pink);
      opacity: 0.8;
      margin-bottom: 8px;
    }

    /* Reviews */
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      padding: 22px;
      border-radius: 12px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #fff;
    }
    .review-name {
      font-weight: 600;
      color: #fff;
      font-size: 0.95rem;
    }
    .review-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      border-radius: 8px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: rgba(157, 78, 221, 0.15);
    }
    .faq-icon {
      color: var(--accent-pink);
      font-weight: bold;
      transition: transform 0.3s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding: 0 24px;
      color: var(--text-sub);
      font-size: 0.95rem;
      line-height: 1.6;
    }
    .faq-item.active .faq-answer {
      padding: 0 24px 20px;
      max-height: 250px;
    }

    /* Form Section */
    .form-box {
      max-width: 760px;
      margin: 0 auto;
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      padding: 36px;
      border-radius: 14px;
      box-shadow: var(--shadow-glow);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-size: 0.95rem;
      color: #fff;
      font-weight: 500;
    }
    .form-control {
      width: 100%;
      background: rgba(15, 9, 28, 0.85);
      border: 1px solid var(--border-soft);
      padding: 12px 16px;
      border-radius: 6px;
      color: #fff;
      font-size: 0.95rem;
      transition: border-color 0.3s;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--accent-pink);
      box-shadow: 0 0 10px rgba(255, 42, 141, 0.4);
    }
    select.form-control option {
      background: #140d25;
      color: #fff;
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
      color: #fff;
      border: none;
      border-radius: 6px;
      font-size: 1.05rem;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 0 18px rgba(255, 42, 141, 0.4);
      transition: all 0.3s;
    }
    .btn-submit:hover {
      box-shadow: 0 0 26px rgba(255, 42, 141, 0.8);
      transform: translateY(-2px);
    }

    /* Articles & Links */
    .article-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 16px;
      margin-top: 24px;
    }
    .article-item {
      background: var(--bg-card);
      border: 1px solid var(--border-soft);
      padding: 16px 20px;
      border-radius: 8px;
      transition: border-color 0.3s;
    }
    .article-item:hover {
      border-color: var(--accent-pink);
    }

    /* Footer */
    footer.site-footer {
      background: #07040d;
      border-top: 1px solid var(--border-soft);
      padding: 50px 0 30px;
      color: var(--text-sub);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-brand p {
      margin-top: 12px;
      font-size: 0.9rem;
      line-height: 1.6;
      color: var(--text-muted);
    }
    .footer-title {
      font-size: 1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
      position: relative;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-links a {
      color: var(--text-sub);
      font-size: 0.9rem;
    }
    .footer-links a:hover {
      color: var(--accent-pink);
    }
    .footer-qrcode {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 10px;
    }
    .footer-qrcode img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
      border: 1px solid var(--border-glow);
    }
    .footer-bottom {
      border-top: 1px solid rgba(157, 78, 221, 0.15);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .friendly-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }
    .friendly-links a {
      color: var(--text-sub);
    }
    .friendly-links a:hover {
      color: var(--accent-pink);
    }

    /* Floating Widget */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 1000;
      background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
      padding: 12px 18px;
      border-radius: 30px;
      color: #fff;
      font-weight: 600;
      box-shadow: 0 0 20px rgba(255, 42, 141, 0.6);
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      transition: transform 0.3s;
    }
    .floating-kefu:hover {
      transform: scale(1.05);
    }
    .kefu-modal {
      display: none;
      position: fixed;
      right: 20px;
      bottom: 90px;
      background: #180f2d;
      border: 1px solid var(--border-glow);
      padding: 20px;
      border-radius: 12px;
      z-index: 1001;
      text-align: center;
      box-shadow: var(--shadow-glow);
    }
    .kefu-modal.active {
      display: block;
    }
    .kefu-modal img {
      width: 140px;
      height: 140px;
      border-radius: 8px;
      margin-bottom: 8px;
    }

    /* Responsive */
    @media (max-width: 992px) {
      .grid-4, .steps-wrapper, .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .header-inner {
        position: relative;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(12, 7, 22, 0.98);
        flex-direction: column;
        align-items: flex-start;
        padding: 15px 20px;
        border-bottom: 1px solid var(--border-soft);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links a {
        padding: 10px 0;
        width: 100%;
      }
      .nav-toggle {
        display: block;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .section-title {
        font-size: 1.6rem;
      }
      .grid-2, .grid-3, .grid-4, .showcase-grid, .steps-wrapper, .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }