:root {
      --bg-primary: #070913;
      --bg-secondary: #0d1226;
      --bg-card: rgba(18, 25, 48, 0.7);
      --border-color: rgba(0, 242, 254, 0.2);
      --text-main: #f0f4ff;
      --text-muted: #94a3b8;
      --neon-cyan: #00f2fe;
      --neon-purple: #9d4edd;
      --neon-pink: #f72585;
      --neon-green: #10b981;
      --gradient-brand: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #9d4edd 100%);
      --container-width: 1200px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      background-color: var(--bg-primary);
      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;
    }
    .container {
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.3s ease;
    }
    /* Header */
    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(7, 9, 19, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      max-height: 44px;
    }
    .brand img {
      max-height: 38px;
      width: auto;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 14px;
      display: inline-block;
      transition: color 0.3s ease;
    }
    .nav-links li a:hover {
      color: var(--neon-cyan);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-neon {
      background: var(--gradient-brand);
      color: #fff;
      padding: 10px 22px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
      border: none;
      cursor: pointer;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .btn-neon:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(0, 242, 254, 0.6);
    }
    .btn-outline {
      border: 1px solid var(--neon-cyan);
      color: var(--neon-cyan);
      background: transparent;
      padding: 9px 20px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.3s;
    }
    .btn-outline:hover {
      background: rgba(0, 242, 254, 0.1);
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.3);
    }
    /* Mobile Nav Toggle */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 24px;
      cursor: pointer;
    }
    /* Hero Section (No Images Allowed) */
    .hero-section {
      padding: 100px 0 80px;
      position: relative;
      text-align: center;
      background: radial-gradient(circle at 50% 30%, rgba(79, 172, 254, 0.15), transparent 70%);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .hero-badge {
      display: inline-block;
      padding: 6px 18px;
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid var(--neon-cyan);
      border-radius: 20px;
      font-size: 13px;
      color: var(--neon-cyan);
      margin-bottom: 24px;
      letter-spacing: 1px;
    }
    .hero-title {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      background: linear-gradient(135deg, #ffffff 30%, var(--neon-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 18px;
      margin-bottom: 60px;
      flex-wrap: wrap;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }
    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px 16px;
      backdrop-filter: blur(8px);
      transition: transform 0.3s;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      border-color: var(--neon-cyan);
    }
    .metric-num {
      font-size: 32px;
      font-weight: 700;
      color: var(--neon-cyan);
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
    }
    /* Common Section */
    .section-wrap {
      padding: 90px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .section-header {
      text-align: center;
      margin-bottom: 56px;
    }
    .section-sub {
      color: var(--neon-cyan);
      font-size: 13px;
      letter-spacing: 2px;
      text-transform: uppercase;
      font-weight: 600;
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .section-intro {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 600px;
      margin: 0 auto;
    }
    /* Grid Layouts */
    .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: 32px;
      align-items: center;
    }
    /* Cards */
    .feature-card {
      background: var(--bg-secondary);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 16px;
      padding: 28px;
      position: relative;
      overflow: hidden;
      transition: all 0.3s ease;
    }
    .feature-card:hover {
      border-color: var(--neon-cyan);
      transform: translateY(-5px);
      box-shadow: 0 10px 30px rgba(0, 242, 254, 0.15);
    }
    .feature-icon {
      width: 48px;
      height: 48px;
      background: rgba(0, 242, 254, 0.1);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--neon-cyan);
      font-size: 20px;
      margin-bottom: 20px;
      border: 1px solid rgba(0, 242, 254, 0.3);
    }
    .feature-card h3 {
      font-size: 18px;
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    /* Platform Tag Cloud */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }
    .tag-pill {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      color: var(--text-muted);
      transition: all 0.3s;
    }
    .tag-pill:hover {
      background: rgba(0, 242, 254, 0.15);
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
    }
    /* Comparison Rating Box */
    .rating-box {
      background: linear-gradient(135deg, rgba(13, 18, 38, 0.8) 0%, rgba(20, 10, 35, 0.8) 100%);
      border: 2px solid var(--neon-cyan);
      border-radius: 20px;
      padding: 40px;
      box-shadow: 0 0 35px rgba(0, 242, 254, 0.2);
      margin-bottom: 40px;
      text-align: center;
    }
    .rating-score {
      font-size: 56px;
      font-weight: 900;
      color: var(--neon-cyan);
      display: flex;
      align-items: baseline;
      justify-content: center;
      gap: 6px;
    }
    .rating-score span {
      font-size: 20px;
      color: var(--text-muted);
      font-weight: 400;
    }
    .stars {
      color: #ffb703;
      font-size: 22px;
      margin-bottom: 12px;
    }
    /* Table Responsive */
    .table-container {
      overflow-x: auto;
      background: var(--bg-secondary);
      border-radius: 16px;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }
    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }
    table.compare-table th, table.compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 14px;
    }
    table.compare-table th {
      background: rgba(0, 242, 254, 0.08);
      color: var(--neon-cyan);
      font-weight: 600;
    }
    table.compare-table tr:hover {
      background: rgba(255, 255, 255, 0.02);
    }
    /* Process Timeline */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: var(--bg-secondary);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 16px;
      padding: 24px;
      position: relative;
    }
    .step-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--neon-cyan);
      opacity: 0.5;
      margin-bottom: 12px;
    }
    /* FAQ Accordion */
    .faq-list {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-secondary);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      overflow: hidden;
      transition: border-color 0.3s;
    }
    .faq-item.active {
      border-color: var(--neon-cyan);
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      padding: 0 24px 20px;
      max-height: 200px;
    }
    /* Testimonials */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--bg-secondary);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 16px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 14px;
      color: var(--text-main);
      margin-bottom: 18px;
      line-height: 1.6;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 14px;
    }
    .review-avatar {
      width: 40px;
      height: 40px;
      background: var(--gradient-brand);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }
    .review-info h4 {
      font-size: 14px;
    }
    .review-info span {
      font-size: 12px;
      color: var(--text-muted);
    }
    /* Form Section */
    .form-container {
      background: var(--bg-secondary);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 40px;
      max-width: 680px;
      margin: 0 auto;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-size: 14px;
      margin-bottom: 8px;
      color: var(--text-muted);
    }
    .form-control {
      width: 100%;
      background: rgba(7, 9, 19, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 8px;
      padding: 12px 16px;
      color: #fff;
      font-size: 14px;
      outline: none;
      transition: border-color 0.3s;
    }
    .form-control:focus {
      border-color: var(--neon-cyan);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }
    /* Media Cards */
    .media-card {
      background: var(--bg-secondary);
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.08);
      transition: transform 0.3s;
    }
    .media-card:hover {
      transform: translateY(-4px);
    }
    .media-img-wrap {
      width: 100%;
      aspect-ratio: 16/9;
      background: #111;
      overflow: hidden;
    }
    .media-img-wrap.square {
      aspect-ratio: 1/1;
    }
    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .media-content {
      padding: 20px;
    }
    /* Articles List */
    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }
    .article-pill {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      padding: 8px 16px;
      border-radius: 8px;
      font-size: 13px;
      color: var(--text-muted);
      transition: all 0.3s;
    }
    .article-pill:hover {
      color: var(--neon-cyan);
      border-color: var(--neon-cyan);
      background: rgba(0, 242, 254, 0.08);
    }
    /* Footer */
    footer {
      background: #04060b;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 60px 0 30px;
      color: var(--text-muted);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #fff;
      font-size: 15px;
      margin-bottom: 18px;
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a:hover {
      color: var(--neon-cyan);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 20px;
      justify-content: center;
    }
    .friend-links a {
      color: var(--text-muted);
    }
    .friend-links a:hover {
      color: var(--neon-cyan);
    }
    /* Floating Bar */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--bg-secondary);
      border: 1px solid var(--neon-cyan);
      color: var(--neon-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.3);
      position: relative;
    }
    .qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: var(--bg-secondary);
      border: 1px solid var(--neon-cyan);
      border-radius: 12px;
      padding: 12px;
      display: none;
      width: 140px;
      text-align: center;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    }
    .qr-popup img {
      width: 100%;
      height: auto;
      border-radius: 6px;
    }
    .qr-popup span {
      font-size: 11px;
      color: var(--text-muted);
      margin-top: 6px;
      display: block;
    }
    .floating-btn:hover .qr-popup {
      display: block;
    }
    /* Responsive */
    @media (max-width: 992px) {
      .grid-4, .hero-metrics, .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-2 {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 30px;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #0d1226;
        flex-direction: column;
        padding: 20px 0;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .grid-4, .grid-3, .hero-metrics, .review-grid, .process-steps {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }