:root {
      --primary-color: #f72585;
      --primary-hover: #b5179e;
      --secondary-color: #4361ee;
      --accent-color: #4cc9f0;
      --accent-orange: #ff7b00;
      --dark-text: #1a1e2d;
      --muted-text: #5c677d;
      --light-text: #ffffff;
      --bg-page: #f8faff;
      --bg-card: #ffffff;
      --bg-alt: #f1f5fb;
      --border-color: #e2e8f0;
      --card-shadow: 0 10px 25px -5px rgba(67, 97, 238, 0.08), 0 8px 10px -6px rgba(247, 37, 133, 0.04);
      --card-shadow-hover: 0 20px 30px -10px rgba(67, 97, 238, 0.16), 0 10px 15px -5px rgba(247, 37, 133, 0.12);
      --gradient-brand: linear-gradient(135deg, #f72585 0%, #7209b7 50%, #4361ee 100%);
      --gradient-warm: linear-gradient(135deg, #ff7b00 0%, #f72585 100%);
      --gradient-cool: linear-gradient(135deg, #4361ee 0%, #4cc9f0 100%);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --container-width: 1200px;
      --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--dark-text);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(247, 37, 133, 0.03) 0%, transparent 40%),
        radial-gradient(circle at 90% 60%, rgba(67, 97, 238, 0.03) 0%, transparent 45%),
        linear-gradient(180deg, #f8faff 0%, #f0f4fc 100%);
      background-attachment: fixed;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-fast);
    }
    ul, ol {
      list-style: none;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: var(--container-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }
    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      padding: 6px 14px;
      border-radius: var(--radius-full);
      background: rgba(247, 37, 133, 0.1);
      color: var(--primary-color);
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--dark-text);
      line-height: 1.3;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--muted-text);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 600;
      padding: 12px 26px;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all var(--transition-fast);
      text-align: center;
      white-space: nowrap;
    }
    .btn:hover {
      transform: translateY(-2px);
    }
    .btn-primary {
      background: var(--gradient-brand);
      color: #fff;
      box-shadow: 0 8px 20px -4px rgba(247, 37, 133, 0.4);
    }
    .btn-primary:hover {
      box-shadow: 0 12px 25px -4px rgba(247, 37, 133, 0.6);
      color: #fff;
    }
    .btn-secondary {
      background: #ffffff;
      color: var(--secondary-color);
      border-color: var(--border-color);
      box-shadow: 0 4px 10px rgba(0,0,0,0.03);
    }
    .btn-secondary:hover {
      border-color: var(--secondary-color);
      background: #f8faff;
    }
    .btn-warm {
      background: var(--gradient-warm);
      color: #fff;
      box-shadow: 0 8px 20px -4px rgba(255, 123, 0, 0.4);
    }
    .btn-warm:hover {
      box-shadow: 0 12px 25px -4px rgba(255, 123, 0, 0.6);
      color: #fff;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }
    .logo-text {
      font-size: 20px;
      font-weight: 800;
      background: var(--gradient-brand);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 600;
      color: var(--dark-text);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-color);
      background: rgba(247, 37, 133, 0.05);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      font-size: 24px;
      color: var(--dark-text);
      cursor: pointer;
      padding: 4px;
    }
    .hero-section {
      padding: 90px 0 70px;
      position: relative;
      overflow: hidden;
      text-align: center;
      background: radial-gradient(circle at 50% 30%, rgba(247, 37, 133, 0.08) 0%, rgba(67, 97, 238, 0.05) 40%, transparent 75%);
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 18px;
      border-radius: var(--radius-full);
      box-shadow: 0 4px 15px rgba(67, 97, 238, 0.08);
      border: 1px solid rgba(247, 37, 133, 0.2);
      margin-bottom: 24px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary-color);
    }
    .hero-title {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--dark-text);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-title span {
      background: var(--gradient-brand);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--muted-text);
      max-width: 820px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }
    .hero-buttons {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 18px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }
    .hero-stats-panel {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-color);
      max-width: 1040px;
      margin: 0 auto;
    }
    .stat-item {
      text-align: center;
      padding: 0 15px;
      border-right: 1px solid var(--border-color);
    }
    .stat-item:last-child {
      border-right: none;
    }
    .stat-num {
      font-size: 36px;
      font-weight: 900;
      line-height: 1;
      margin-bottom: 8px;
      background: var(--gradient-brand);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .stat-label {
      font-size: 14px;
      color: var(--muted-text);
      font-weight: 600;
    }
    .model-pills-bar {
      margin-top: 35px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    .model-pill {
      font-size: 13px;
      background: #ffffff;
      padding: 6px 14px;
      border-radius: var(--radius-full);
      border: 1px solid rgba(67, 97, 238, 0.15);
      color: var(--dark-text);
      font-weight: 500;
      box-shadow: 0 2px 6px rgba(0,0,0,0.02);
      transition: var(--transition-fast);
    }
    .model-pill:hover {
      background: var(--primary-color);
      color: #fff;
      transform: translateY(-2px);
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
      align-items: center;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }
    .card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      transition: all var(--transition-fast);
      position: relative;
      overflow: hidden;
    }
    .card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-shadow-hover);
      border-color: rgba(247, 37, 133, 0.3);
    }
    .card-top-icon {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 20px;
      background: rgba(247, 37, 133, 0.1);
      color: var(--primary-color);
    }
    .card-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 12px;
    }
    .card-desc {
      font-size: 14px;
      color: var(--muted-text);
      line-height: 1.65;
    }
    .tag-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      padding: 3px 8px;
      border-radius: 4px;
      background: #f1f5fb;
      color: var(--secondary-color);
      margin-top: 15px;
    }
    .about-visual-box {
      background: linear-gradient(135deg, rgba(67, 97, 238, 0.05), rgba(247, 37, 133, 0.05));
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
    }
    .about-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 24px;
    }
    .about-item {
      display: flex;
      gap: 14px;
      align-items: flex-start;
    }
    .about-check {
      min-width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--gradient-brand);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 800;
    }
    .media-card {
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      transition: var(--transition-fast);
    }
    .media-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
    }
    .media-img-wrap {
      width: 100%;
      overflow: hidden;
      background: #edf2f7;
    }
    .media-img-wrap img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .media-card:hover .media-img-wrap img {
      transform: scale(1.04);
    }
    .media-body {
      padding: 22px;
    }
    .compare-container {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      overflow: hidden;
    }
    .compare-score-banner {
      background: var(--gradient-brand);
      color: #ffffff;
      padding: 24px 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }
    .score-badge-huge {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }
    .score-badge-huge .num {
      font-size: 46px;
      font-weight: 900;
      line-height: 1;
    }
    .score-badge-huge .out-of {
      font-size: 18px;
      opacity: 0.9;
    }
    .stars {
      color: #ffb703;
      font-size: 22px;
      letter-spacing: 2px;
    }
    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, 
    .compare-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
      font-size: 15px;
    }
    .compare-table th {
      background: #f8faff;
      color: var(--dark-text);
      font-weight: 700;
    }
    .compare-table tr:hover td {
      background: rgba(67, 97, 238, 0.02);
    }
    .highlight-cell {
      background: rgba(247, 37, 133, 0.04);
      color: var(--primary-color);
      font-weight: 700;
    }
    .step-box {
      position: relative;
      background: #ffffff;
      padding: 30px 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      text-align: center;
    }
    .step-number {
      width: 44px;
      height: 44px;
      line-height: 44px;
      margin: 0 auto 16px;
      background: var(--gradient-cool);
      color: #fff;
      font-size: 18px;
      font-weight: 800;
      border-radius: 50%;
    }
    .form-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--dark-text);
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 15px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: var(--transition-fast);
      background: #fafcff;
      color: var(--dark-text);
    }
    .form-control:focus {
      border-color: var(--secondary-color);
      background: #ffffff;
      box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.1);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: var(--transition-fast);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 17px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      color: var(--dark-text);
    }
    .faq-question::after {
      content: '+';
      font-size: 22px;
      font-weight: 400;
      color: var(--primary-color);
      transition: transform var(--transition-fast);
    }
    .faq-item.active .faq-question::after {
      content: '−';
      transform: rotate(180deg);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 22px;
      font-size: 15px;
      color: var(--muted-text);
      line-height: 1.7;
      border-top: 1px dashed var(--border-color);
      padding-top: 16px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .testimonial-card {
      background: #ffffff;
      padding: 26px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-content {
      font-size: 14px;
      color: var(--muted-text);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .user-avatar-tag {
      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: 15px;
    }
    .user-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--dark-text);
    }
    .user-role {
      font-size: 13px;
      color: var(--muted-text);
    }
    .price-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      text-align: center;
      position: relative;
    }
    .price-card.featured {
      border: 2px solid var(--primary-color);
      box-shadow: 0 15px 35px -5px rgba(247, 37, 133, 0.2);
    }
    .price-badge {
      position: absolute;
      top: 14px;
      right: 18px;
      background: var(--primary-color);
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: var(--radius-full);
    }
    .price-value {
      font-size: 42px;
      font-weight: 900;
      color: var(--dark-text);
      margin: 20px 0 10px;
    }
    .price-value span {
      font-size: 16px;
      font-weight: 500;
      color: var(--muted-text);
    }
    .price-features {
      margin: 24px 0;
      text-align: left;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 14px;
      color: var(--muted-text);
    }
    .price-features li {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .price-features li::before {
      content: "✓";
      color: var(--secondary-color);
      font-weight: 900;
    }
    .article-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }
    .article-links-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-top: 16px;
    }
    .article-link-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      background: #f8faff;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      font-size: 14px;
      font-weight: 600;
      color: var(--dark-text);
      transition: var(--transition-fast);
    }
    .article-link-item:hover {
      background: #ffffff;
      border-color: var(--secondary-color);
      color: var(--secondary-color);
      transform: translateX(4px);
    }
    .site-footer {
      background: #ffffff;
      color: var(--dark-text);
      padding: 60px 0 30px;
      border-top: 1px solid var(--border-color);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1.2fr 1.2fr 1.6fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 20px;
      color: var(--dark-text);
      position: relative;
      padding-bottom: 10px;
    }
    .footer-col h4::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: 0;
      width: 32px;
      height: 3px;
      background: var(--primary-color);
      border-radius: 2px;
    }
    .footer-links-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-links-list a {
      color: var(--muted-text);
      font-size: 14px;
    }
    .footer-links-list a:hover {
      color: var(--primary-color);
    }
    .footer-contact-info {
      font-size: 14px;
      color: var(--muted-text);
      line-height: 1.8;
    }
    .footer-qr-card {
      display: inline-block;
      text-align: center;
      background: #f8faff;
      padding: 12px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      margin-top: 12px;
    }
    .footer-qr-card img {
      width: 100px;
      height: 100px;
      border-radius: 4px;
      margin-bottom: 6px;
    }
    .footer-qr-card span {
      font-size: 12px;
      color: var(--dark-text);
      font-weight: 600;
      display: block;
    }
    .friendly-links-bar {
      border-top: 1px solid var(--border-color);
      padding: 24px 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      font-size: 13px;
    }
    .friendly-links-bar span {
      font-weight: 700;
      color: var(--dark-text);
    }
    .friendly-links-bar a {
      color: var(--muted-text);
      background: #f1f5fb;
      padding: 4px 10px;
      border-radius: 4px;
    }
    .friendly-links-bar a:hover {
      color: var(--primary-color);
      background: rgba(247, 37, 133, 0.08);
    }
    .footer-bottom-bar {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--muted-text);
      flex-wrap: wrap;
      gap: 10px;
    }
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--dark-text);
      box-shadow: 0 4px 14px rgba(0,0,0,0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border-color);
      cursor: pointer;
      transition: var(--transition-fast);
      position: relative;
    }
    .float-btn:hover {
      background: var(--primary-color);
      color: #fff;
      transform: scale(1.08);
    }
    .float-qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #fff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
      border: 1px solid var(--border-color);
      display: none;
      width: 140px;
      text-align: center;
    }
    .float-btn:hover .float-qr-popup {
      display: block;
    }
    .float-qr-popup img {
      width: 100%;
      height: auto;
      border-radius: 4px;
    }
    .float-qr-popup p {
      font-size: 12px;
      color: var(--dark-text);
      margin-top: 6px;
      font-weight: 600;
    }
    @media (max-width: 1024px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-panel {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 20px;
      }
      .stat-item:nth-child(2) {
        border-right: none;
      }
    }
    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 15px 20px rgba(0,0,0,0.06);
        border-bottom: 1px solid var(--border-color);
        display: none;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 12px 16px;
      }
      .grid-2, .grid-3 {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-subtitle {
        font-size: 15px;
      }
      .hero-stats-panel {
        grid-template-columns: 1fr;
      }
      .stat-item {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 15px;
      }
      .stat-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .compare-score-banner {
        flex-direction: column;
        align-items: flex-start;
      }
      .floating-tools {
        right: 12px;
        bottom: 20px;
      }
    }