:root {
  --primary-red: #D9232E;
  --primary-dark: #A8131C;
  --primary-light: #FFF0F1;
  --accent-gold: #D97706;
  --accent-orange: #EA580C;
  --text-main: #1F2937;
  --text-muted: #4B5563;
  --text-light: #9CA3AF;
  --bg-page: #FAF9F8;
  --bg-card: #FFFFFF;
  --border-color: #F3D2D5;
  --shadow-sm: 0 2px 8px rgba(217, 35, 46, 0.06);
  --shadow-md: 0 8px 24px rgba(217, 35, 46, 0.1);
  --shadow-lg: 0 16px 36px rgba(217, 35, 46, 0.14);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --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", Arial, "Noto Sans", sans-serif;
  color: var(--text-main);
  background-color: var(--bg-page);
  line-height: 1.6;
}

body {
  background: radial-gradient(circle at 50% 0%, #FFF5F5 0%, #FAF9F8 60%);
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

.site-container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 2px 10px rgba(0,0,0,0.03);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo-box {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-box .ai-page-logo {
  height: 40px;
  width: auto;
}

.brand-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary-red);
  letter-spacing: -0.5px;
}

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

.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: var(--primary-light);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-red), var(--primary-dark));
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(217, 35, 46, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #E62A36, #B81520);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(217, 35, 46, 0.35);
}

.btn-outline {
  border-color: var(--primary-red);
  color: var(--primary-red);
  background: transparent;
}

.btn-outline:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-main);
  cursor: pointer;
}

/* Sections Global */
.section {
  padding: 80px 0;
  position: relative;
}

.section-head {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary-red);
  background: var(--primary-light);
  padding: 4px 14px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
}

.section-subtitle {
  margin-top: 10px;
  font-size: 16px;
  color: var(--text-muted);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* Hero Section (No Images Allowed) */
.hero-section {
  padding: 100px 0 80px;
  background: linear-gradient(180deg, rgba(255, 238, 239, 0.7) 0%, rgba(250, 249, 248, 1) 100%);
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-red);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.hero-title {
  font-size: 44px;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-title span {
  color: var(--primary-red);
}

.hero-desc {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 54px;
  flex-wrap: wrap;
}

.btn-hero-main {
  font-size: 16px;
  padding: 14px 34px;
  border-radius: 30px;
}

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

.metric-card {
  background: var(--bg-card);
  padding: 24px 16px;
  border-radius: var(--radius-md);
  border: 1px solid #F5E5E7;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-red);
}

.metric-num {
  font-size: 32px;
  font-weight: 900;
  color: var(--primary-red);
  margin-bottom: 4px;
}

.metric-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
}

/* Models Cloud */
.models-banner {
  background: #FFFFFF;
  border: 1px dashed var(--border-color);
  padding: 24px;
  border-radius: var(--radius-md);
  margin-top: 40px;
  text-align: center;
}

.models-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 14px;
}

.tags-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.tag-pill {
  font-size: 12px;
  padding: 4px 12px;
  background: #FFF5F5;
  color: var(--primary-red);
  border-radius: 20px;
  border: 1px solid var(--border-color);
  font-weight: 600;
}

/* Grid Layouts */
.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: 28px;
}

/* Feature Cards */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid #F1ECEB;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-color);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 900;
  margin-bottom: 18px;
}

.card-title {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--text-main);
}

.card-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  flex-grow: 1;
}

/* Media Showcase */
.showcase-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  margin-top: 32px;
}

.showcase-box {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.showcase-box img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  transition: var(--transition);
}

.showcase-box:hover img {
  transform: scale(1.02);
}

.showcase-info {
  padding: 20px;
}

.showcase-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.showcase-text {
  font-size: 13px;
  color: var(--text-muted);
}

.showcase-square img {
  aspect-ratio: 1/1;
}

/* Process Timeline */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}

.step-card {
  background: #FFFFFF;
  border: 1px solid #F1ECEB;
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  position: relative;
}

.step-num {
  width: 36px;
  height: 36px;
  background: var(--primary-red);
  color: #FFFFFF;
  font-weight: 900;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  box-shadow: 0 4px 10px rgba(217, 35, 46, 0.3);
}

.step-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 13px;
  color: var(--text-muted);
}

/* Evaluation Comparison Table */
.eval-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 2px solid var(--border-color);
  padding: 36px;
  box-shadow: var(--shadow-md);
}

.eval-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #F3ECEB;
  padding-bottom: 24px;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 16px;
}

.eval-score-badge {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--primary-light);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.eval-score {
  font-size: 38px;
  font-weight: 900;
  color: var(--primary-red);
  line-height: 1;
}

.eval-stars {
  color: #F59E0B;
  font-size: 18px;
  letter-spacing: 2px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.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 #F3ECEB;
}

.custom-table th {
  background: #FFF8F8;
  color: var(--primary-dark);
  font-weight: 800;
  font-size: 14px;
}

.custom-table td {
  font-size: 14px;
  color: var(--text-main);
}

.custom-table tr:hover td {
  background: #FFFDFD;
}

.status-highlight {
  font-weight: 700;
  color: var(--primary-red);
}

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

.price-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  text-align: center;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.price-card.featured {
  border: 2px solid var(--primary-red);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.price-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-red);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: 20px;
}

.price-value {
  font-size: 36px;
  font-weight: 900;
  color: var(--primary-red);
  margin: 16px 0;
}

.price-features {
  list-style: none;
  margin: 20px 0 28px;
  text-align: left;
  flex-grow: 1;
}

.price-features li {
  font-size: 13px;
  color: var(--text-muted);
  padding: 8px 0;
  border-bottom: 1px dashed #F5ECEB;
}

/* FAQ Accordion */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: #FFFFFF;
  border: 1px solid #EFE8E8;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 18px 24px;
  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;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0 24px;
  background: #FFFDFD;
}

.faq-answer p {
  padding-bottom: 18px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

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

/* Reviews */
.review-card {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid #F1ECEB;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.avatar-initial {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary-red);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.user-meta h4 {
  font-size: 14px;
  font-weight: 700;
}

.user-meta p {
  font-size: 12px;
  color: var(--text-muted);
}

.review-body {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Articles */
.articles-box {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border-color);
}

.article-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 16px;
}

.article-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: #FAF8F8;
  transition: var(--transition);
}

.article-row:hover {
  background: var(--primary-light);
  padding-left: 20px;
}

.article-row a {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.article-row:hover a {
  color: var(--primary-red);
}

/* Contact & Form */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 32px;
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.contact-info h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 16px;
}

.contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 24px;
}

.contact-item {
  font-size: 14px;
  color: var(--text-muted);
}

.contact-item strong {
  color: var(--text-main);
}

.qr-box {
  display: inline-block;
  padding: 10px;
  background: #FAF8F8;
  border: 1px solid #ECE3E3;
  border-radius: var(--radius-md);
  text-align: center;
}

.qr-box img {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.qr-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--primary-red);
  margin-top: 6px;
}

.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #E0D5D5;
  border-radius: var(--radius-sm);
  font-size: 14px;
  transition: var(--transition);
  background: #FAF8F8;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-red);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(217, 35, 46, 0.1);
}

textarea.form-control {
  resize: vertical;
  min-height: 90px;
}

/* Footer */
.site-footer {
  background: #111827;
  color: #D1D5DB;
  padding: 60px 0 24px;
  border-top: 4px solid var(--primary-red);
}

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

.footer-brand h4 {
  color: #FFFFFF;
  font-size: 20px;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.7;
  color: #9CA3AF;
  max-width: 380px;
}

.footer-col h5 {
  color: #FFFFFF;
  font-size: 15px;
  margin-bottom: 16px;
}

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

.footer-links a {
  font-size: 13px;
  color: #9CA3AF;
}

.footer-links a:hover {
  color: #FFFFFF;
}

.friend-links-box {
  border-top: 1px solid #374151;
  padding-top: 24px;
  margin-bottom: 24px;
}

.friend-links-title {
  font-size: 13px;
  color: #9CA3AF;
  margin-bottom: 12px;
  font-weight: 700;
}

.friend-links-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.friend-links-wrap a {
  font-size: 12px;
  color: #9CA3AF;
}

.friend-links-wrap a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid #1F2937;
  padding-top: 20px;
  text-align: center;
  font-size: 12px;
  color: #6B7280;
}

/* Sticky Float */
.float-kefu {
  position: fixed;
  right: 20px;
  bottom: 80px;
  z-index: 99;
  background: var(--primary-red);
  color: #FFFFFF;
  border-radius: 50%;
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: var(--transition);
}

.float-kefu:hover {
  transform: scale(1.08);
}

.float-modal {
  position: fixed;
  right: 80px;
  bottom: 80px;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 16px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: none;
  z-index: 100;
  text-align: center;
}

.float-modal img {
  width: 140px;
  height: 140px;
}

/* Responsive */
@media (max-width: 992px) {
  .hero-title { font-size: 32px; }
  .grid-3, .grid-4, .pricing-grid, .process-steps, .hero-metrics { grid-template-columns: repeat(2, 1fr); }
  .showcase-grid, .contact-wrapper, .footer-main { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
}

@media (max-width: 600px) {
  .hero-title { font-size: 26px; }
  .grid-3, .grid-4, .grid-2, .pricing-grid, .process-steps, .hero-metrics { grid-template-columns: 1fr; }
  .section { padding: 50px 0; }
  .eval-score-badge { width: 100%; justify-content: center; }
}