:root {
  --primary-red: #D91A2A;
  --dark-red: #9E0E1B;
  --bright-red: #FF334B;
  --accent-gold: #FFB300;
  --bg-warm: #FFF9F8;
  --bg-card: #FFFFFF;
  --text-main: #1F1616;
  --text-muted: #5C4A4A;
  --border-light: #F4D3D5;
  --shadow-sm: 0 4px 12px rgba(217, 26, 42, 0.06);
  --shadow-md: 0 10px 24px rgba(217, 26, 42, 0.12);
  --shadow-lg: 0 16px 36px rgba(158, 14, 27, 0.15);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --max-w: 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-warm);
  color: var(--text-main);
  line-height: 1.6;
}
body {
  width: 100%;
  overflow-x: hidden;
  background: radial-gradient(circle at 10% 20%, rgba(255, 235, 235, 0.8) 0%, transparent 40%),
              radial-gradient(circle at 90% 80%, rgba(255, 240, 230, 0.8) 0%, transparent 40%),
              var(--bg-warm);
}
a {
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
}
ul {
  list-style: none;
}
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--border-light);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-group .ai-page-logo {
  height: 38px;
  width: auto;
  display: block;
}
.brand-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary-red);
  letter-spacing: -0.5px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
}
.nav-links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
}
.nav-links a:hover {
  color: var(--primary-red);
  background: rgba(217, 26, 42, 0.05);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn-primary-site {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 700;
  color: #FFFFFF !important;
  background: linear-gradient(135deg, var(--bright-red), var(--primary-red));
  border-radius: 50px;
  box-shadow: 0 4px 14px rgba(217, 26, 42, 0.3);
}
.btn-primary-site:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(217, 26, 42, 0.4);
}
.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-light);
  font-size: 20px;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--primary-red);
  cursor: pointer;
}
.hero-section {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: #FFE8E8;
  border: 1px solid var(--border-light);
  color: var(--dark-red);
  font-size: 13px;
  font-weight: 700;
  border-radius: 30px;
  margin-bottom: 24px;
}
.hero-title {
  font-size: 40px;
  line-height: 1.25;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero-title span {
  color: var(--primary-red);
}
.hero-desc {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 36px;
}
.hero-cta-box {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.btn-hero-main {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 700;
  color: #FFFFFF !important;
  background: linear-gradient(135deg, var(--bright-red), var(--dark-red));
  border-radius: 50px;
  box-shadow: 0 8px 24px rgba(217, 26, 42, 0.35);
}
.btn-hero-main:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(217, 26, 42, 0.45);
}
.btn-hero-sub {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-red);
  background: #FFFFFF;
  border: 2px solid var(--primary-red);
  border-radius: 50px;
}
.btn-hero-sub:hover {
  background: #FFF0F1;
}
.hero-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 20px;
}
.metric-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease;
}
.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.metric-num {
  font-size: 32px;
  font-weight: 900;
  color: var(--primary-red);
  line-height: 1;
  margin-bottom: 6px;
}
.metric-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
}
.section-wrapper {
  padding: 70px 0;
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  color: var(--primary-red);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.section-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}
.section-sub {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}
.models-tag-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  background: #FFFFFF;
  padding: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.model-pill {
  display: inline-block;
  padding: 8px 16px;
  background: #FFF4F4;
  border: 1px solid var(--border-light);
  border-radius: 30px;
  font-size: 14px;
  font-weight: 700;
  color: var(--dark-red);
  transition: all 0.2s ease;
}
.model-pill:hover {
  background: var(--primary-red);
  color: #FFFFFF;
  transform: translateY(-2px);
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feature-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}
.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--bright-red);
  box-shadow: var(--shadow-md);
}
.feature-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, #FFE8E8, #FFD2D5);
  color: var(--primary-red);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  margin-bottom: 20px;
}
.feature-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}
.feature-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  flex-grow: 1;
}
.banner-media-box {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 40px;
  text-align: center;
}
.banner-media-box .ai-page-image {
  border-radius: var(--radius-md);
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}
.gallery-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
  margin-top: 30px;
}
.gallery-item {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  padding: 16px;
  box-shadow: var(--shadow-sm);
}
.gallery-item img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
  object-fit: cover;
}
.gallery-caption {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 12px;
  text-align: center;
}
.timeline-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.step-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.step-badge {
  display: inline-block;
  padding: 4px 10px;
  background: var(--primary-red);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 800;
  border-radius: 4px;
  margin-bottom: 12px;
}
.step-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-desc {
  font-size: 13px;
  color: var(--text-muted);
}
.score-banner {
  background: linear-gradient(135deg, var(--dark-red), var(--primary-red));
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 30px;
  box-shadow: var(--shadow-md);
}
.score-info h3 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 8px;
}
.score-info p {
  font-size: 15px;
  opacity: 0.9;
}
.score-rating {
  text-align: right;
}
.score-val {
  font-size: 48px;
  font-weight: 900;
  color: var(--accent-gold);
  line-height: 1;
}
.score-stars {
  font-size: 20px;
  color: var(--accent-gold);
  margin-top: 4px;
}
.table-responsive {
  width: 100%;
  overflow-x: auto;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.custom-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}
.custom-table th, .custom-table td {
  padding: 16px 20px;
  border-bottom: 1px solid #F0ECEC;
  font-size: 14px;
}
.custom-table th {
  background: #FFF2F3;
  color: var(--dark-red);
  font-weight: 700;
}
.custom-table tr:last-child td {
  border-bottom: none;
}
.custom-table .highlight-col {
  background: #FFF9F9;
  font-weight: 700;
  color: var(--primary-red);
}
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.review-avatar {
  width: 44px;
  height: 44px;
  background: #FFE8E8;
  color: var(--primary-red);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
}
.review-role {
  font-size: 12px;
  color: var(--text-muted);
}
.review-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}
.review-stars {
  color: var(--accent-gold);
  font-size: 13px;
  margin-bottom: 8px;
}
.review-text {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  padding: 18px 24px;
  text-align: left;
  background: none;
  border: none;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}
.faq-question:hover {
  color: var(--primary-red);
}
.faq-icon {
  font-size: 18px;
  color: var(--primary-red);
  transition: transform 0.3s ease;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}
.faq-item.active .faq-answer {
  padding-bottom: 18px;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
}
.articles-wrapper {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.articles-dynamic-box {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}
.article-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
}
.article-link-item {
  display: block;
  padding: 12px 16px;
  background: #FFF4F4;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--dark-red);
}
.article-link-item:hover {
  background: var(--primary-red);
  color: #FFFFFF;
}
.form-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.form-group-full {
  grid-column: span 2;
}
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #E0D4D4;
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: #FAFAFA;
  outline: none;
  transition: border-color 0.2s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary-red);
  background: #FFFFFF;
}
.form-textarea {
  resize: vertical;
  min-height: 110px;
}
.btn-submit {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--bright-red), var(--primary-red));
  border: none;
  border-radius: var(--radius-sm);
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(217, 26, 42, 0.3);
}
.btn-submit:hover {
  background: linear-gradient(135deg, var(--primary-red), var(--dark-red));
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: center;
}
.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-info-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--text-main);
  background: #FFFFFF;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}
.qr-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.qr-card img {
  max-width: 160px;
  height: auto;
  margin: 0 auto 12px;
  display: block;
  border-radius: var(--radius-sm);
}
.site-footer {
  background: #231617;
  color: #FFFFFF;
  padding: 50px 0 20px;
  margin-top: 60px;
  border-top: 4px solid var(--primary-red);
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand h4 {
  font-size: 20px;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 13px;
  color: #CCCCCC;
  line-height: 1.6;
}
.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 14px;
  border-left: 3px solid var(--primary-red);
  padding-left: 8px;
}
.footer-links-list a {
  display: block;
  font-size: 13px;
  color: #CCCCCC;
  margin-bottom: 8px;
}
.footer-links-list a:hover {
  color: var(--bright-red);
}
.friend-links-box {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.friend-links-box a {
  font-size: 12px;
  color: #CCCCCC;
  background: rgba(255, 255, 255, 0.08);
  padding: 6px 12px;
  border-radius: 4px;
}
.friend-links-box a:hover {
  background: var(--primary-red);
  color: #FFFFFF;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: #888888;
}
.float-widget {
  position: fixed;
  right: 20px;
  bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 999;
}
.float-btn {
  width: 46px;
  height: 46px;
  background: var(--primary-red);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  border: none;
}
.float-btn:hover {
  background: var(--dark-red);
}
@media (max-width: 992px) {
  .hero-title { font-size: 32px; }
  .hero-metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .grid-4, .reviews-grid, .timeline-steps { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .gallery-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #FFFFFF;
    border-bottom: 2px solid var(--border-light);
    padding: 16px 20px;
    box-shadow: var(--shadow-md);
  }
  .mobile-toggle { display: block; }
  .hero-title { font-size: 26px; }
  .grid-3, .grid-4, .grid-2, .reviews-grid, .timeline-steps, .contact-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .form-group-full { grid-column: span 1; }
  .score-banner { flex-direction: column; text-align: center; gap: 16px; }
  .score-rating { text-align: center; }
  .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
}