/* Global Reset & Base Variables - Laser Iridescent Light Theme */
    :root {
      --primary: #6366f1;
      --primary-dark: #4f46e5;
      --secondary: #ec4899;
      --accent-cyan: #06b6d4;
      --accent-purple: #a855f7;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-main: #f8fafc;
      --bg-card: rgba(255, 255, 255, 0.82);
      --border-color: rgba(226, 232, 240, 0.9);
      --laser-gradient: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(236, 72, 153, 0.15), rgba(6, 182, 212, 0.15));
      --laser-border: linear-gradient(135deg, #6366f1, #a855f7, #ec4899, #06b6d4);
      --laser-btn: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
      --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(236, 72, 153, 0.08);
      --shadow-lg: 0 20px 25px -5px rgba(99, 102, 241, 0.12), 0 8px 10px -6px rgba(168, 85, 247, 0.1);
      --radius: 16px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.05) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(236, 72, 153, 0.05) 0%, transparent 40%),
                  radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.04) 0%, transparent 50%),
                  #f8fafc;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

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

    /* Header & Navigation */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      transition: var(--transition);
    }

    .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;
      color: var(--text-main);
      font-weight: 700;
      font-size: 1.25rem;
    }

    .logo-box img.ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .nav-wrapper {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.92rem;
      font-weight: 500;
      border-radius: 8px;
      transition: var(--transition);
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(99, 102, 241, 0.06);
    }

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

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 30px;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn-laser {
      background: var(--laser-btn);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
    }

    .btn-laser:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(236, 72, 153, 0.4);
      filter: brightness(1.05);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid rgba(99, 102, 241, 0.3);
    }

    .btn-outline:hover {
      background: rgba(99, 102, 241, 0.05);
      border-color: var(--primary);
      color: var(--primary);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* Section Styles */
    section {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 48px;
    }

    .laser-tag {
      display: inline-block;
      padding: 4px 16px;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 1px;
      text-transform: uppercase;
      background: var(--laser-gradient);
      border: 1px solid rgba(168, 85, 247, 0.3);
      border-radius: 20px;
      color: var(--primary-dark);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Laser Card Component */
    .laser-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .laser-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--laser-border);
      opacity: 0;
      transition: var(--transition);
    }

    .laser-card:hover {
      transform: translateY(-4px);
      border-color: rgba(168, 85, 247, 0.4);
      box-shadow: var(--shadow-md);
    }

    .laser-card:hover::before {
      opacity: 1;
    }

    /* Hero Section (Strictly NO Images) */
    .hero-section {
      padding: 80px 0 60px;
      background: linear-gradient(180deg, rgba(255,255,255,0.7) 0%, rgba(248,250,252,0.9) 100%);
      position: relative;
      overflow: hidden;
    }

    .hero-wrapper {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid rgba(99, 102, 241, 0.3);
      border-radius: 30px;
      box-shadow: 0 4px 12px rgba(99, 102, 241, 0.08);
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary-dark);
      margin-bottom: 24px;
    }

    .hero-badge .sparkle {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--secondary);
      box-shadow: 0 0 10px var(--secondary);
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      letter-spacing: -0.5px;
      color: #0f172a;
      line-height: 1.25;
      margin-bottom: 20px;
    }

    .hero-title .laser-text {
      background: linear-gradient(135deg, #4f46e5 0%, #a855f7 40%, #ec4899 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.18rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

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

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

    .metric-card {
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(226, 232, 240, 0.8);
      border-radius: 14px;
      padding: 20px 14px;
      box-shadow: var(--shadow-sm);
    }

    .metric-value {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.85rem;
      color: var(--text-light);
      font-weight: 500;
    }

    /* Grid Layouts */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    /* Model Cloud / Badges */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 16px;
    }

    .model-pill {
      padding: 5px 12px;
      background: #ffffff;
      border: 1px solid rgba(203, 213, 225, 0.8);
      border-radius: 6px;
      font-size: 0.8rem;
      color: var(--text-muted);
      font-weight: 600;
      transition: var(--transition);
    }

    .model-pill:hover {
      border-color: var(--accent-purple);
      color: var(--primary);
      background: rgba(168, 85, 247, 0.05);
    }

    /* Feature & Service Card Details */
    .service-card {
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--laser-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      color: var(--primary);
      font-size: 1.4rem;
      font-weight: 700;
    }

    .service-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .service-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* Process Flow */
    .process-step {
      position: relative;
      padding: 24px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
    }

    .step-number {
      font-size: 1.6rem;
      font-weight: 900;
      color: var(--primary);
      opacity: 0.35;
      position: absolute;
      top: 16px;
      right: 18px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

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

    /* Media Library Section & Images */
    .media-container {
      border-radius: 12px;
      overflow: hidden;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .media-container img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
      transition: var(--transition);
    }

    .media-container:hover img {
      transform: scale(1.02);
    }

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

    .banner-strip .ai-page-image {
      border-radius: 10px;
      width: 100%;
      height: 160px;
      object-fit: cover;
      display: block;
      border: 1px solid var(--border-color);
    }

    /* Comparison Table */
    .compare-box {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-md);
      margin-top: 24px;
    }

    .score-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 24px;
      background: var(--laser-gradient);
      border: 1px solid rgba(168, 85, 247, 0.4);
      border-radius: 30px;
      font-weight: 800;
      color: var(--primary-dark);
      font-size: 1.1rem;
      margin-bottom: 24px;
    }

    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.94rem;
    }

    table.compare-table th, 
    table.compare-table td {
      padding: 18px 22px;
      border-bottom: 1px solid var(--border-color);
    }

    table.compare-table th {
      background: rgba(248, 250, 252, 0.9);
      font-weight: 700;
      color: var(--text-main);
    }

    table.compare-table tr:hover td {
      background: rgba(99, 102, 241, 0.02);
    }

    .highlight-col {
      background: rgba(99, 102, 241, 0.04);
      font-weight: 600;
      color: var(--primary-dark);
    }

    /* User Reviews */
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }

    .review-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
    }

    .reviewer-info h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .reviewer-info span {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    .stars {
      color: #f59e0b;
      font-size: 0.95rem;
    }

    .review-content {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* FAQ Accordion */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: rgba(99, 102, 241, 0.4);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 1rem;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      transition: var(--transition);
      color: var(--text-light);
    }

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

    .faq-answer {
      padding: 0 24px 18px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* Form & Contact */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

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

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      background: #f8fafc;
      color: var(--text-main);
      transition: var(--transition);
      outline: none;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    }

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

    .contact-info-panel {
      background: linear-gradient(145deg, #f8fafc, #f1f5f9);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 30px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      margin-bottom: 18px;
    }

    .contact-item-title {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .contact-item-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .qr-box {
      text-align: center;
      margin-top: 15px;
      padding: 16px;
      background: #ffffff;
      border-radius: 10px;
      border: 1px dashed rgba(99, 102, 241, 0.3);
    }

    .qr-box img {
      max-width: 130px;
      height: auto;
      display: block;
      margin: 0 auto 8px;
      border-radius: 6px;
    }

    .qr-label {
      font-size: 0.82rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* Article List */
    .article-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
    }

    .article-links {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 16px;
    }

    .article-link-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      background: #f8fafc;
      border-radius: 8px;
      text-decoration: none;
      color: var(--text-main);
      font-size: 0.92rem;
      font-weight: 500;
      transition: var(--transition);
      border: 1px solid transparent;
    }

    .article-link-item:hover {
      border-color: rgba(99, 102, 241, 0.3);
      background: #ffffff;
      color: var(--primary);
      transform: translateX(4px);
    }

    /* Footer */
    footer.site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px;
      margin-top: 40px;
      color: var(--text-muted);
    }

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

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links li a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.88rem;
      transition: var(--transition);
    }

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

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friend-links-wrap a {
      color: var(--text-light);
      text-decoration: none;
      font-size: 0.85rem;
      padding: 4px 10px;
      background: #f1f5f9;
      border-radius: 4px;
      transition: var(--transition);
    }

    .friend-links-wrap a:hover {
      color: var(--primary);
      background: rgba(99, 102, 241, 0.1);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* Floating CTA */
    .floating-kefu {
      position: fixed;
      right: 24px;
      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 rgba(99, 102, 241, 0.3);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      cursor: pointer;
      text-decoration: none;
      transition: var(--transition);
      font-size: 1.1rem;
    }

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

    /* Responsive */
    @media (max-width: 992px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .contact-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .banner-strip { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .hero-title { font-size: 2rem; }
      .nav-wrapper {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        display: none;
        box-shadow: var(--shadow-lg);
      }
      .nav-wrapper.active { display: block; }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li a { width: 100%; }
      .mobile-menu-btn { display: block; }
      .header-actions { display: none; }
      .hero-metrics { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .banner-strip { grid-template-columns: 1fr; }
    }