:root {
  --primary: #0b57d0;
  --primary-light: #1a73e8;
  --primary-dark: #003a8c;
  --accent: #00c48c;
  --accent-warm: #ff6d00;
  --bg-main: #f4f8fc;
  --bg-card: #ffffff;
  --text-main: #1f2937;
  --text-sub: #4b5563;
  --text-light: #8c9ba5;
  --border-color: #dbe4ee;
  --shadow-sm: 0 4px 12px rgba(11, 87, 208, 0.05);
  --shadow-md: 0 10px 25px rgba(11, 87, 208, 0.08);
  --shadow-hover: 0 14px 30px rgba(11, 87, 208, 0.15);
  --radius: 12px;
  --container-width: 1200px;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
}
body {
  width: 100%;
  overflow-x: hidden;
  background: radial-gradient(circle at 10% 10%, #e6effd 0%, #f4f8fc 60%, #eef5ff 100%);
}
a {
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
}
.container {
  width: 100%;
  max-width: var(--container-width);
  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);
  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;
}
.ai-page-logo {
  height: 40px;
  width: auto;
  display: block;
}
.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.5px;
}
nav.nav-menu {
  display: flex;
  align-items: center;
}
.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0;
}
.nav-links li a {
  display: block;
  padding: 8px 14px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-sub);
  border-radius: 6px;
}
.nav-links li a:hover,
.nav-links li a.active {
  color: var(--primary);
  background: #eef5ff;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  color: #ffffff;
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(26, 115, 232, 0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26, 115, 232, 0.4);
  color: #ffffff;
}
.btn-outline {
  background: #ffffff;
  color: var(--primary);
  border: 1px solid var(--primary);
  padding: 9px 20px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn-outline:hover {
  background: #eef5ff;
  transform: translateY(-2px);
}
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  margin: 5px 0;
  transition: 0.3s;
}

section {
  padding: 80px 0;
}
.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px;
}
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: #e1edff;
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 20px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-sub);
}

.hero-section {
  padding: 100px 0 70px;
  text-align: center;
  position: relative;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ffffff;
  padding: 8px 18px;
  border-radius: 30px;
  border: 1px solid #c7dcfa;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  font-size: 0.9rem;
  color: var(--primary);
  font-weight: 600;
}
.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 196, 140, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0, 196, 140, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 196, 140, 0); }
}
.hero-title {
  font-size: 2.8rem;
  font-weight: 900;
  color: #0b224e;
  line-height: 1.25;
  margin-bottom: 22px;
  letter-spacing: -1px;
}
.hero-title .highlight {
  color: var(--primary-light);
  background: linear-gradient(120deg, var(--primary), #00a2ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-sub);
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 50px;
}
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1040px;
  margin: 0 auto;
}
.metric-box {
  background: #ffffff;
  padding: 24px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  text-align: center;
}
.metric-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}
.metric-label {
  font-size: 0.9rem;
  color: var(--text-sub);
}

.models-wall {
  background: #ffffff;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  margin-top: 40px;
  text-align: center;
}
.models-wall-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-sub);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.models-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
.model-tag {
  background: #f0f6ff;
  color: var(--primary-dark);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid #d5e5fb;
  transition: all 0.2s;
}
.model-tag:hover {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  transform: translateY(-2px);
}

.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;
}

.service-card {
  background: #ffffff;
  border-radius: var(--radius);
  padding: 30px 24px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: #b8d5fb;
}
.service-icon {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background: #e8f2fe;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 20px;
}
.service-card h3 {
  font-size: 1.25rem;
  color: #111827;
  margin-bottom: 12px;
  font-weight: 700;
}
.service-card p {
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.6;
  flex-grow: 1;
}

.feature-pill-list {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.feature-pill {
  font-size: 0.75rem;
  background: #f1f5f9;
  color: #475569;
  padding: 3px 8px;
  border-radius: 4px;
}

.flow-step-wrapper {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.flow-card {
  background: #ffffff;
  padding: 28px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  position: relative;
}
.flow-num {
  font-size: 2.2rem;
  font-weight: 900;
  color: #d1e4fd;
  margin-bottom: 10px;
  line-height: 1;
}
.flow-card h4 {
  font-size: 1.15rem;
  color: var(--text-main);
  margin-bottom: 8px;
}
.flow-card p {
  font-size: 0.9rem;
  color: var(--text-sub);
}

.eval-container {
  background: #ffffff;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  padding: 36px;
}
.eval-header-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, #0b57d0, #1a73e8);
  color: #ffffff;
  padding: 24px 30px;
  border-radius: 12px;
  margin-bottom: 30px;
}
.eval-score-box {
  display: flex;
  align-items: center;
  gap: 20px;
}
.score-big {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
}
.stars {
  color: #ffc107;
  font-size: 1.3rem;
  margin-bottom: 4px;
}
.table-responsive {
  width: 100%;
  overflow-x: auto;
}
.custom-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}
.custom-table th, .custom-table td {
  padding: 16px 20px;
  border-bottom: 1px solid #edf2f7;
  font-size: 0.95rem;
}
.custom-table th {
  background: #f8fafc;
  color: var(--text-main);
  font-weight: 700;
}
.badge-check {
  display: inline-block;
  color: var(--accent);
  font-weight: 700;
}
.badge-cross {
  display: inline-block;
  color: #ef4444;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.gallery-card {
  background: #ffffff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}
.gallery-card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
  transition: transform 0.3s;
}
.gallery-card:hover img {
  transform: scale(1.03);
}
.gallery-info {
  padding: 20px;
}
.gallery-info h4 {
  font-size: 1.15rem;
  color: #111827;
  margin-bottom: 6px;
}
.gallery-info p {
  font-size: 0.9rem;
  color: var(--text-sub);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: #ffffff;
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.review-quote {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 20px;
  line-height: 1.6;
}
.reviewer-info {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid #f1f5f9;
  padding-top: 14px;
}
.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #e0edfe;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}
.reviewer-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #1e293b;
}
.reviewer-role {
  font-size: 0.8rem;
  color: var(--text-sub);
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #ffffff;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: border-color 0.2s;
}
.faq-item.active {
  border-color: var(--primary-light);
}
.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.faq-icon {
  font-size: 1.2rem;
  color: var(--primary);
  transition: transform 0.3s;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
}
.faq-answer {
  padding: 0 24px 20px;
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.6;
  display: none;
}
.faq-item.active .faq-answer {
  display: block;
}

.contact-section-wrap {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  background: #ffffff;
  padding: 40px;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}
.contact-info-side h3 {
  font-size: 1.5rem;
  color: #111827;
  margin-bottom: 16px;
}
.contact-info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 24px;
}
.contact-info-list li {
  font-size: 0.95rem;
  color: var(--text-sub);
}
.contact-info-list strong {
  color: var(--text-main);
}
.qr-box {
  background: #f8fafc;
  padding: 16px;
  border-radius: 10px;
  display: inline-block;
  border: 1px solid #e2e8f0;
  text-align: center;
}
.qr-box img {
  width: 130px;
  height: 130px;
  display: block;
  margin: 0 auto 8px;
}
.qr-box span {
  font-size: 0.85rem;
  color: var(--text-sub);
}

.contact-form-side form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}
.form-control {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.95rem;
  outline: none;
  background: #fcfdfe;
  transition: border-color 0.2s;
}
.form-control:focus {
  border-color: var(--primary);
  background: #ffffff;
}
textarea.form-control {
  resize: vertical;
  min-height: 100px;
}

.agent-banner {
  background: linear-gradient(135deg, #092c63, #0b57d0);
  border-radius: 16px;
  padding: 46px;
  color: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.agent-banner h3 {
  font-size: 1.8rem;
  margin-bottom: 12px;
}
.agent-banner p {
  font-size: 1rem;
  opacity: 0.9;
  max-width: 600px;
}

.article-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #ffffff;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}
.article-item-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: 8px;
  background: #f8fafc;
  color: var(--text-main);
  font-size: 0.95rem;
  transition: background 0.2s;
}
.article-item-link:hover {
  background: #eef5ff;
  color: var(--primary);
}

footer.site-footer {
  background: #0d1b2a;
  color: #cbd5e1;
  padding: 60px 0 30px;
  border-top: 1px solid #1e293b;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 40px;
}
.footer-col h4 {
  font-size: 1.1rem;
  color: #ffffff;
  margin-bottom: 16px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links li a {
  color: #94a3b8;
  font-size: 0.9rem;
}
.footer-links li a:hover {
  color: #ffffff;
}
.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: #64748b;
}
.footer-friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
  width: 100%;
}
.footer-friend-links a {
  color: #94a3b8;
}
.footer-friend-links a:hover {
  color: var(--primary-light);
}

.float-bar {
  position: fixed;
  right: 20px;
  bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 999;
}
.float-btn {
  width: 48px;
  height: 48px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}
.float-btn:hover {
  background: var(--primary);
  color: #ffffff;
  transform: scale(1.08);
}
.float-qr-popup {
  position: absolute;
  right: 60px;
  bottom: 0;
  background: #ffffff;
  padding: 12px;
  border-radius: 10px;
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--border-color);
  display: none;
  text-align: center;
  width: 140px;
}
.float-btn:hover .float-qr-popup {
  display: block;
}
.float-qr-popup img {
  width: 100%;
  height: auto;
  display: block;
  margin-bottom: 4px;
}
.float-qr-popup span {
  font-size: 0.75rem;
  color: var(--text-main);
}

@media (max-width: 992px) {
  .hero-title { font-size: 2.2rem; }
  .grid-4, .flow-step-wrapper, .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-section-wrap { grid-template-columns: 1fr; }
  .agent-banner { flex-direction: column; text-align: center; gap: 20px; }
  .menu-toggle { display: block; }
  .nav-menu {
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    padding: 20px;
    display: none;
  }
  .nav-menu.open { display: flex; }
  .nav-links { flex-direction: column; width: 100%; }
  .nav-links li { width: 100%; text-align: center; }
  .nav-links li a { padding: 12px; }
  .header-actions { display: none; }
}
@media (max-width: 600px) {
  .hero-title { font-size: 1.8rem; }
  .grid-3, .grid-4, .flow-step-wrapper, .reviews-grid, .gallery-grid, .grid-2 { grid-template-columns: 1fr; }
  .hero-metrics { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .eval-header-card { flex-direction: column; text-align: center; gap: 14px; }
  .hero-cta { flex-direction: column; width: 100%; }
  .hero-cta a { width: 100%; }
}