:root {
  --primary: #1e40af;
  --primary-light: #3b82f6;
  --primary-dark: #1e3a8a;
  --accent: #2563eb;
  --accent-cyan: #0284c7;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #64748b;
  --border-color: #e2e8f0;
  --border-focus: #93c5fd;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(30, 64, 175, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 20px 25px -5px rgba(30, 64, 175, 0.12), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition: all 0.25s ease-in-out;
}
* {
  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", Arial, "Noto Sans", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}
ul, ol {
  list-style: none;
}
.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand-area {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-logo-wrap {
  display: flex;
  align-items: center;
  max-height: 42px;
}
.ai-page-logo {
  max-height: 40px;
  width: auto;
  object-fit: contain;
}
.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-dark);
  letter-spacing: -0.5px;
}
.nav-wrap {
  display: flex;
  align-items: center;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
}
.nav-links li a {
  padding: 8px 14px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}
.nav-links li a:hover,
.nav-links li a.active {
  color: var(--primary);
  background-color: #eff6ff;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: 16px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}
.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(30, 64, 175, 0.25);
}
.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(30, 64, 175, 0.35);
  color: #ffffff;
}
.btn-outline {
  background-color: transparent;
  border-color: var(--primary-light);
  color: var(--primary);
}
.btn-outline:hover {
  background-color: #eff6ff;
  border-color: var(--primary);
}
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-main);
  margin: 5px 0;
  transition: var(--transition);
}
.hero-section {
  position: relative;
  background: linear-gradient(135deg, #f0f7ff 0%, #e0edff 50%, #eff6ff 100%);
  border-bottom: 1px solid var(--border-color);
  padding: 80px 0 60px;
  overflow: hidden;
}
.hero-section::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(255, 255, 255, 0) 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-section::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.12) 0%, rgba(255, 255, 255, 0) 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background-color: #ffffff;
  border: 1px solid #bfdbfe;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}
.hero-title {
  font-size: 2.5rem;
  line-height: 1.25;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.btn-hero-primary {
  padding: 14px 32px;
  font-size: 1.05rem;
  border-radius: 30px;
}
.btn-hero-secondary {
  padding: 14px 28px;
  font-size: 1.05rem;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 30px;
  color: var(--text-main);
}
.btn-hero-secondary:hover {
  border-color: var(--primary-light);
  background-color: #f8fafc;
  color: var(--primary);
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background-color: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.9);
  padding: 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(8px);
}
.stat-item {
  text-align: center;
  border-right: 1px solid var(--border-color);
}
.stat-item:last-child {
  border-right: none;
}
.stat-num {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
}
.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.section {
  padding: 72px 0;
  position: relative;
}
.section-alt {
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}
.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
  background-color: #dbeafe;
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  line-height: 1.3;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.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;
}
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-light);
}
.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: #eff6ff;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
  border: 1px solid #bfdbfe;
}
.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}
.card-text {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex-grow: 1;
}
.card-tags {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-pill {
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 4px;
  background-color: #f1f5f9;
  color: var(--text-muted);
}
.model-badges-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 24px;
}
.model-badge {
  padding: 6px 14px;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
}
.model-badge:hover {
  border-color: var(--primary-light);
  color: var(--primary);
}
.steps-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.step-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
}
.step-num {
  font-size: 2rem;
  font-weight: 900;
  color: #dbeafe;
  line-height: 1;
  margin-bottom: 12px;
}
.step-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}
.step-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.table-wrap {
  width: 100%;
  overflow-x: auto;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.custom-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 600px;
}
.custom-table th,
.custom-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.925rem;
}
.custom-table th {
  background-color: #f8fafc;
  color: var(--text-main);
  font-weight: 700;
}
.custom-table tr:hover td {
  background-color: #f1f5f9;
}
.rating-banner {
  background: linear-gradient(135deg, #1e40af, #2563eb);
  color: #ffffff;
  padding: 36px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  box-shadow: var(--shadow-lg);
}
.rating-score-box {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.rating-huge {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
}
.rating-stars {
  color: #facc15;
  font-size: 1.5rem;
}
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.active {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}
.faq-header {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-main);
  user-select: none;
}
.faq-header:hover {
  background-color: #f8fafc;
  color: var(--primary);
}
.faq-toggle-icon {
  font-size: 1.2rem;
  color: var(--primary);
  transition: transform 0.25s ease;
}
.faq-item.active .faq-toggle-icon {
  transform: rotate(45deg);
}
.faq-body {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.active .faq-body {
  padding: 0 24px 20px;
  max-height: 400px;
}
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.testi-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}
.testi-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.testi-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: #dbeafe;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}
.testi-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}
.testi-role {
  font-size: 0.8rem;
  color: var(--text-light);
}
.testi-quote {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex-grow: 1;
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}
.gallery-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  background-color: #ffffff;
}
.gallery-item img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}
.gallery-item:hover img {
  transform: scale(1.05);
}
.gallery-sub-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
}
.media-box {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  padding: 12px;
}
.media-box img {
  width: 100%;
  border-radius: var(--radius-sm);
  display: block;
}
.articles-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.article-item {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
}
.article-title-link {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}
.article-title-link:hover {
  color: var(--primary);
}
.article-meta {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 12px;
}
.form-container {
  max-width: 760px;
  margin: 0 auto;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}
.form-group {
  margin-bottom: 20px;
}
.form-label {
  display: block;
  font-size: 0.9rem;
  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-color: #f8fafc;
  outline: none;
  transition: var(--transition);
}
.form-control:focus {
  border-color: var(--primary);
  background-color: #ffffff;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}
textarea.form-control {
  resize: vertical;
  min-height: 120px;
}
.contact-section-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: start;
}
.contact-info-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}
.contact-icon-box {
  width: 44px;
  height: 44px;
  background-color: #eff6ff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.25rem;
  flex-shrink: 0;
}
.qr-box {
  text-align: center;
  padding: 16px;
  background-color: #f8fafc;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin-top: 20px;
}
.qr-box img {
  max-width: 140px;
  height: auto;
  margin: 0 auto 8px;
  display: block;
  border-radius: 4px;
}
.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px;
  color: var(--text-muted);
}
.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}
.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.footer-links a:hover {
  color: var(--primary);
}
.friend-links-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  margin-bottom: 24px;
}
.friend-links-wrap a {
  font-size: 0.85rem;
  color: var(--text-light);
  padding: 4px 10px;
  background-color: #f1f5f9;
  border-radius: 4px;
}
.friend-links-wrap a:hover {
  color: var(--primary);
  background-color: #e2e8f0;
}
.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}
.floating-widget {
  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-color: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-size: 1.2rem;
}
.float-btn:hover {
  background-color: var(--primary-dark);
  transform: scale(1.08);
}
@media (max-width: 992px) {
  .hero-title {
    font-size: 2rem;
  }
  .grid-4, .gallery-grid, .steps-container {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3, .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-main, .contact-section-layout, .gallery-sub-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-item:nth-child(2) {
    border-right: none;
  }
  .stat-item:nth-child(1), .stat-item:nth-child(2) {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
  }
}
@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
  .nav-wrap {
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 20px;
    display: none;
    box-shadow: var(--shadow-md);
  }
  .nav-wrap.show {
    display: flex;
  }
  .nav-links {
    flex-direction: column;
    width: 100%;
    align-items: flex-start;
  }
  .nav-links li {
    width: 100%;
  }
  .nav-links li a {
    display: block;
    width: 100%;
    padding: 10px 14px;
  }
  .nav-actions {
    margin: 16px 0 0 0;
    width: 100%;
    justify-content: flex-start;
  }
  .hero-title {
    font-size: 1.75rem;
  }
  .grid-3, .grid-4, .grid-2, .steps-container, .testimonials-grid, .articles-list {
    grid-template-columns: 1fr;
  }
  .form-container {
    padding: 24px;
  }
  .rating-banner {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
}