:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --accent: #f97316;
  --accent-light: #ffedd5;
  --cyan-accent: #06b6d4;
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #64748b;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --radius: 12px;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-main);
  background-color: var(--bg-page);
  line-height: 1.6;
}
body {
  width: 100%;
  overflow-x: hidden;
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
header.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand-area {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.brand-area .ai-page-logo {
  height: 40px;
  width: auto;
  display: block;
}
.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.5px;
}
.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0;
}
.nav-links li a {
  display: inline-block;
  padding: 8px 14px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}
.nav-links li a:hover,
.nav-links li a.active {
  color: var(--primary);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}
.btn-accent {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(249, 115, 22, 0.25);
}
.btn-accent:hover {
  background: #ea580c;
  transform: translateY(-1px);
}
.btn-outline {
  border-color: var(--border-color);
  background: #ffffff;
  color: var(--text-main);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-main);
  cursor: pointer;
}
.hero-section {
  padding: 70px 0 50px;
  background: linear-gradient(135deg, #eff6ff 0%, #fff7ed 50%, #f0fdf4 100%);
  border-bottom: 1px solid var(--border-color);
}
.hero-content {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}
.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: #dbeafe;
  color: var(--primary);
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 20px;
  border: 1px solid #bfdbfe;
}
.hero-title {
  font-size: 2.75rem;
  line-height: 1.25;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero-title span {
  color: var(--primary);
}
.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}
.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}
.stat-card {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--border-color);
  padding: 20px 16px;
  border-radius: var(--radius);
  text-align: center;
  backdrop-filter: blur(5px);
}
.stat-num {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}
.section-wrapper {
  padding: 70px 0;
}
.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 48px;
}
.section-badge {
  display: inline-block;
  font-size: 0.8rem;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-light);
  padding: 4px 12px;
  border-radius: 6px;
  margin-bottom: 12px;
}
.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}
.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
}
.model-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
}
.badge-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.875rem;
  color: var(--text-main);
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}
.badge-item:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.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: 30px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: #eff6ff;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin-bottom: 16px;
  font-size: 1.2rem;
}
.card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
  color: var(--text-main);
}
.card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.card-tag {
  display: inline-block;
  font-size: 0.75rem;
  background: #f1f5f9;
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 4px;
  margin-top: 12px;
}
.steps-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.step-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}
.step-num {
  font-size: 1.75rem;
  font-weight: 800;
  color: #bfdbfe;
  line-height: 1;
  margin-bottom: 12px;
}
.step-item h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.step-item p {
  font-size: 0.875rem;
  color: var(--text-muted);
}
.media-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}
.media-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.media-img-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #e2e8f0;
  overflow: hidden;
}
.media-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-content {
  padding: 20px;
}
.banner-gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 24px;
}
.banner-gallery-item {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  aspect-ratio: 16 / 9;
  background: #e2e8f0;
}
.banner-gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 600px;
}
.compare-table th,
.compare-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.95rem;
}
.compare-table th {
  background: #f8fafc;
  color: var(--text-main);
  font-weight: 600;
}
.compare-table tr:last-child td {
  border-bottom: none;
}
.highlight-row {
  background: #eff6ff;
  font-weight: 600;
  color: var(--primary);
}
.rating-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #fef3c7;
  color: #b45309;
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 700;
  font-size: 0.85rem;
}
.faq-list {
  max-width: 850px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: #ffffff;
  overflow: hidden;
}
.faq-header {
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  color: var(--text-main);
  background: #ffffff;
}
.faq-header:hover {
  background: #f8fafc;
}
.faq-icon {
  font-size: 1.25rem;
  color: var(--text-muted);
  transition: transform 0.2s ease;
}
.faq-body {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.25s ease-out;
  color: var(--text-muted);
  font-size: 0.925rem;
  line-height: 1.6;
}
.faq-item.active .faq-body {
  padding: 0 20px 16px;
  max-height: 250px;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
}
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.testimonial-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.testimonial-text {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  font-style: italic;
}
.testimonial-user {
  display: flex;
  align-items: center;
  gap: 12px;
}
.avatar-placeholder {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #dbeafe;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}
.user-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}
.user-role {
  font-size: 0.8rem;
  color: var(--text-light);
}
.article-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.article-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  text-decoration: none;
  color: var(--text-main);
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.article-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}
.article-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}
.article-link-text {
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 500;
}
.form-section {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}
.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.95rem;
  color: var(--text-main);
  background: #ffffff;
  outline: none;
}
.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
textarea.form-control {
  resize: vertical;
  min-height: 100px;
}
.contact-info-block {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.info-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.qr-code-box {
  width: 130px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px;
  background: #ffffff;
  text-align: center;
}
.qr-code-box img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
}
.qr-code-box span {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
}
footer.site-footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 60px 0 30px;
  border-top: 1px solid #1e293b;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-col h4 {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col ul li a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}
.footer-col ul li a:hover {
  color: #ffffff;
}
.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  font-size: 0.85rem;
  color: #64748b;
  text-align: center;
}
.footer-links-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.footer-links-inline a {
  color: #94a3b8;
  text-decoration: none;
}
.footer-links-inline a:hover {
  color: #ffffff;
}
.float-tool {
  position: fixed;
  bottom: 30px;
  right: 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-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  text-decoration: none;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.2s ease;
}
.float-btn:hover {
  background: var(--primary);
  color: #ffffff;
}
@media (max-width: 1024px) {
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3, .testimonial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4, .steps-container, .banner-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-grid {
    grid-template-columns: repeat(3, 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;
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
  }
  .nav-links.show {
    display: flex;
  }
  .hero-title {
    font-size: 2rem;
  }
  .grid-3, .grid-4, .grid-2, .testimonial-grid, .steps-container, .media-card-grid, .article-grid, .footer-grid {
    grid-template-columns: 1fr;
  }
  .form-section {
    padding: 20px;
  }
}