:root {
      --primary: #4f46e5;
      --primary-light: #818cf8;
      --secondary: #06b6d4;
      --accent: #ec4899;
      --laser-gradient: linear-gradient(135deg, rgba(238, 242, 255, 0.95) 0%, rgba(245, 235, 255, 0.95) 35%, rgba(224, 247, 250, 0.95) 70%, rgba(254, 242, 242, 0.95) 100%);
      --laser-border: linear-gradient(135deg, rgba(99, 102, 241, 0.4), rgba(236, 72, 153, 0.4), rgba(6, 182, 212, 0.4));
      --bg-main: #f8fafc;
      --card-bg: rgba(255, 255, 255, 0.88);
      --card-hover: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-soft: #64748b;
      --border-color: rgba(203, 213, 225, 0.7);
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 15px -3px rgba(99, 102, 241, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 20px 25px -5px rgba(99, 102, 241, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(236, 72, 153, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 50%, rgba(6, 182, 212, 0.05) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(129, 140, 248, 0.08) 0px, transparent 50%);
      background-attachment: fixed;
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .nav-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-wrap .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
      border-radius: 6px;
    }

    .brand-text {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--text-main);
    }

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

    .nav-item {
      display: inline-block;
    }

    .nav-link {
      display: inline-block;
      padding: 8px 14px;
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.925rem;
      font-weight: 500;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.06);
    }

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

    .btn-laser {
      position: relative;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      color: #ffffff;
      text-decoration: none;
      background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #db2777 100%);
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
      border: none;
      cursor: pointer;
      transition: var(--transition);
      overflow: hidden;
      white-space: nowrap;
    }

    .btn-laser:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(124, 58, 237, 0.45);
      opacity: 0.96;
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      color: var(--primary);
      text-decoration: none;
      background: #ffffff;
      border: 1px solid rgba(79, 70, 229, 0.4);
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-outline:hover {
      background: rgba(79, 70, 229, 0.05);
      border-color: var(--primary);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 6px;
    }

    /* Hero Section (Strictly No Images) */
    .hero-section {
      padding: 80px 0 64px;
      position: relative;
    }

    .hero-content {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: linear-gradient(90deg, rgba(79, 70, 229, 0.1), rgba(236, 72, 153, 0.1));
      border: 1px solid rgba(99, 102, 241, 0.25);
      border-radius: 999px;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
    }

    .hero-badge::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      box-shadow: 0 0 8px #10b981;
    }

    .hero-title {
      font-size: clamp(2rem, 4.5vw, 3.1rem);
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.03em;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-btn-main {
      padding: 14px 34px;
      font-size: 1.05rem;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 20px;
    }

    .stat-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      padding: 24px 18px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      position: relative;
      overflow: hidden;
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(99, 102, 241, 0.4);
    }

    .stat-card::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, #4f46e5, #ec4899, #06b6d4);
    }

    .stat-value {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
      letter-spacing: -0.02em;
    }

    .stat-label {
      font-size: 0.875rem;
      color: var(--text-soft);
      font-weight: 500;
    }

    /* Section Common Styles */
    .section-padding {
      padding: 72px 0;
    }

    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 52px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.825rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--primary);
      margin-bottom: 10px;
    }

    .section-h2 {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.02em;
    }

    .section-sub {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* Cards & Grids */
    .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: 28px;
    }

    .feature-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      background: var(--card-hover);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(99, 102, 241, 0.4);
    }

    .feature-icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(79, 70, 229, 0.12), rgba(236, 72, 153, 0.12));
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      margin-bottom: 20px;
      font-size: 1.35rem;
      font-weight: bold;
    }

    .feature-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .feature-text {
      font-size: 0.925rem;
      color: var(--text-muted);
      flex-grow: 1;
      line-height: 1.6;
    }

    .feature-footer-tag {
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px dashed var(--border-color);
      font-size: 0.8rem;
      color: var(--primary);
      font-weight: 600;
    }

    /* Model Chips Cloud */
    .models-chip-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-chip {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 999px;
      font-size: 0.875rem;
      font-weight: 500;
      color: var(--text-main);
      box-shadow: 0 2px 4px rgba(0,0,0,0.02);
      transition: var(--transition);
    }

    .model-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: scale(1.04);
      background: rgba(79, 70, 229, 0.04);
    }

    /* Showcase Images Component */
    .image-showcase-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
      align-items: stretch;
      margin-top: 32px;
    }

    .showcase-item {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .showcase-item .ai-page-image,
    .showcase-item img {
      width: 100%;
      height: 260px;
      object-fit: cover;
      display: block;
      transition: transform 0.5s ease;
    }

    .showcase-item:hover img {
      transform: scale(1.03);
    }

    .showcase-info {
      padding: 20px;
      flex-grow: 1;
    }

    .showcase-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .showcase-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* Comparison Table Component */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .eval-score-badge {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      padding: 20px;
      background: linear-gradient(90deg, rgba(79, 70, 229, 0.08), rgba(236, 72, 153, 0.08));
      border-bottom: 1px solid var(--border-color);
      font-weight: 700;
      color: var(--text-main);
      font-size: 1.1rem;
    }

    .eval-stars {
      color: #f59e0b;
      letter-spacing: 2px;
    }

    .eval-score {
      font-size: 1.6rem;
      color: #ef4444;
      font-weight: 800;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.925rem;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .compare-table th {
      background: #f8fafc;
      color: var(--text-main);
      font-weight: 700;
    }

    .compare-table tr:hover {
      background: rgba(248, 250, 252, 0.6);
    }

    .compare-table .highlight-col {
      background: rgba(79, 70, 229, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    /* Flow Steps */
    .flow-steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .flow-step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .flow-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: rgba(79, 70, 229, 0.18);
      position: absolute;
      top: 14px;
      right: 18px;
      line-height: 1;
    }

    .flow-step-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .flow-step-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* Testimonials (6 Reviews) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-body {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      position: relative;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 14px;
      border-top: 1px solid rgba(226, 232, 240, 0.8);
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 700;
      font-size: 1rem;
    }

    .author-meta h4 {
      font-size: 0.95rem;
      color: var(--text-main);
      font-weight: 600;
    }

    .author-meta p {
      font-size: 0.8rem;
      color: var(--text-soft);
    }

    /* FAQ Component */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-header {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 18px 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-size: 1.025rem;
      font-weight: 600;
      color: var(--text-main);
      transition: color 0.2s ease;
    }

    .faq-header:hover {
      color: var(--primary);
    }

    .faq-icon {
      font-size: 1.2rem;
      color: var(--text-soft);
      transition: transform 0.25s ease;
    }

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

    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #fbfcfe;
    }

    .faq-inner {
      padding: 0 22px 18px;
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Form & Contact Section */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: start;
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .contact-item-row {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 20px;
    }

    .contact-item-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(79, 70, 229, 0.08);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
    }

    .contact-item-detail h4 {
      font-size: 0.875rem;
      color: var(--text-soft);
    }

    .contact-item-detail p {
      font-size: 1.05rem;
      color: var(--text-main);
      font-weight: 600;
    }

    .qr-container {
      margin-top: 24px;
      padding: 20px;
      background: #f8fafc;
      border-radius: var(--radius-sm);
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      border: 1px dashed var(--border-color);
    }

    .qr-container img {
      width: 140px;
      height: 140px;
      object-fit: contain;
      border-radius: 6px;
      margin-bottom: 8px;
    }

    .qr-label {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background: #f8fafc;
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* Articles Component */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-link {
      color: var(--text-main);
      text-decoration: none;
      font-weight: 600;
      font-size: 1rem;
      margin-bottom: 12px;
      line-height: 1.45;
      transition: color 0.2s ease;
      display: block;
    }

    .article-link:hover {
      color: var(--primary);
    }

    .article-meta {
      font-size: 0.8rem;
      color: var(--text-soft);
      display: flex;
      justify-content: space-between;
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }

    /* Footer & Friendly Links */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 32px;
      color: var(--text-muted);
      margin-top: 40px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-about p {
      font-size: 0.9rem;
      margin-top: 14px;
      max-width: 320px;
      line-height: 1.6;
    }

    .footer-col h4 {
      font-size: 0.975rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
    }

    .footer-links-list {
      list-style: none;
    }

    .footer-links-list li {
      margin-bottom: 10px;
    }

    .footer-links-list a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.9rem;
      transition: color 0.2s ease;
    }

    .footer-links-list a:hover {
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.875rem;
      color: var(--text-soft);
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
      margin-bottom: 24px;
      padding: 16px;
      background: #f8fafc;
      border-radius: var(--radius-sm);
    }

    .friend-links-title {
      font-weight: 600;
      color: var(--text-main);
      font-size: 0.875rem;
    }

    .friend-links-wrap a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.85rem;
      transition: color 0.2s ease;
    }

    .friend-links-wrap a:hover {
      color: var(--primary);
    }

    /* Fixed Floating Widget */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-main);
      cursor: pointer;
      text-decoration: none;
      transition: var(--transition);
      font-size: 1.1rem;
      font-weight: bold;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: scale(1.08);
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .grid-4, .hero-stats-grid, .flow-steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .reviews-grid, .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        padding: 16px 20px;
        box-shadow: var(--shadow-lg);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-link {
        width: 100%;
        padding: 12px;
      }
      .grid-2, .grid-3, .grid-4, .hero-stats-grid, .flow-steps-grid, .reviews-grid, .articles-grid, .contact-grid, .image-showcase-grid {
        grid-template-columns: 1fr;
      }
      .hero-section {
        padding: 48px 0 40px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }