:root {
  --primary: #e60067;
  --primary-hover: #c40057;
  --primary-light: #fff0f5;
  --primary-gradient: linear-gradient(135deg, #e60067 0%, #ff4b8b 100%);
  --secondary: #2b1020;
  --text-main: #1f2329;
  --text-muted: #5c6370;
  --bg-page: #fdfafb;
  --bg-card: #ffffff;
  --border-color: #f3d6e2;
  --shadow-sm: 0 2px 8px rgba(230, 0, 103, 0.06);
  --shadow-md: 0 8px 24px rgba(230, 0, 103, 0.1);
  --shadow-lg: 0 16px 36px rgba(230, 0, 103, 0.14);
  --radius: 12px;
  --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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text-main);
  background-color: var(--bg-page);
}

body {
  line-height: 1.65;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

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

a:hover {
  color: var(--primary-hover);
}

/* 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);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.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(--secondary);
}

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

.nav-links li a {
  padding: 8px 12px;
  font-size: 0.95rem;
  color: var(--text-main);
  font-weight: 500;
}

.nav-links li a:hover {
  color: var(--primary);
}

.nav-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;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 14px rgba(230, 0, 103, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(230, 0, 103, 0.35);
}

.btn-outline {
  border-color: var(--primary);
  color: var(--primary) !important;
  background: #ffffff;
}

.btn-outline:hover {
  background: var(--primary-light);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--secondary);
  cursor: pointer;
}

/* Section Common */
.section {
  padding: 70px 0;
}

.section-alt {
  background: #fff5f8;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px auto;
}

.section-badge {
  display: inline-block;
  padding: 4px 14px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 12px;
  border: 1px solid var(--border-color);
}

.section-title {
  font-size: 2.1rem;
  color: var(--secondary);
  margin-bottom: 12px;
  font-weight: 700;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
}

/* Hero Section (Strictly no images) */
.hero-section {
  padding: 90px 0 80px;
  background: radial-gradient(circle at 80% 20%, #ffeaf1 0%, #fdfafb 60%);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.hero-content h1 {
  font-size: 2.5rem;
  line-height: 1.25;
  color: var(--secondary);
  margin-bottom: 20px;
  font-weight: 800;
}

.hero-highlight {
  color: var(--primary);
  position: relative;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-tag-item {
  padding: 6px 12px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero-visual-card {
  background: #ffffff;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  padding: 30px;
  position: relative;
}

.visual-top-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.visual-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ffd1df;
}

.visual-dot:first-child { background: var(--primary); }

.stat-grid-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat-box {
  background: #fff8fa;
  padding: 20px;
  border-radius: 8px;
  border: 1px solid #fce3ec;
  text-align: center;
}

.stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Feature Grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 18px;
  font-weight: bold;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--secondary);
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Model Matrix */
.model-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 30px;
}

.model-chip {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 8px 18px;
  border-radius: 30px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--secondary);
  transition: var(--transition);
}

.model-chip:hover {
  background: var(--primary-gradient);
  color: #ffffff;
  border-color: transparent;
}

/* Banners and Media Showcase */
.banner-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.banner-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  background: #ffffff;
}

.ai-page-image {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.4s ease;
}

.banner-item:hover .ai-page-image {
  transform: scale(1.03);
}

.media-case-box {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin-top: 30px;
}

.media-case-card {
  background: #ffffff;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  overflow: hidden;
  padding: 16px;
}

.media-case-card img {
  border-radius: 8px;
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  margin-bottom: 12px;
}

.media-case-card.square img {
  aspect-ratio: 1/1;
}

/* Comparison Table */
.comparison-container {
  background: #ffffff;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  overflow-x: auto;
  box-shadow: var(--shadow-md);
}

.comp-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 650px;
}

.comp-table th, .comp-table td {
  padding: 16px 20px;
  border-bottom: 1px solid #f5e4ec;
}

.comp-table th {
  background: #fff0f5;
  color: var(--secondary);
  font-weight: 700;
}

.comp-table tr:hover {
  background: #fffdfd;
}

.badge-tag {
  display: inline-block;
  padding: 2px 8px;
  background: #e60067;
  color: #fff;
  font-size: 0.75rem;
  border-radius: 4px;
}

/* Steps */
.step-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  counter-reset: step-counter;
}

.step-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}

.step-number {
  display: inline-block;
  width: 36px;
  height: 36px;
  line-height: 36px;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 800;
  border-radius: 50%;
  text-align: center;
  margin-bottom: 14px;
}

/* Testimonials */
.testi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.testi-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testi-text {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 16px;
  font-style: normal;
}

.testi-user {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid #f9ebf1;
  padding-top: 12px;
}

.user-avatar-badge {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.user-meta-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--secondary);
}

.user-meta-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  width: 100%;
  padding: 18px 24px;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--secondary);
  cursor: pointer;
  text-align: left;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform 0.3s;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  background: #fffcfd;
}

.faq-item.active .faq-answer {
  padding-bottom: 18px;
}

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

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--secondary);
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
  background: #fffdfd;
}

.form-control:focus {
  border-color: var(--primary);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(230, 0, 103, 0.1);
}

.contact-info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
}

.qr-box {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--primary-light);
  border-radius: 8px;
  border: 1px dashed var(--border-color);
}

.qr-box img {
  width: 90px;
  height: 90px;
  border-radius: 6px;
  background: #ffffff;
  display: block;
}

/* Articles and Links */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.article-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  transition: var(--transition);
}

.article-item:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* Footer */
.site-footer {
  background: #1b0a14;
  color: #d1b8c6;
  padding: 60px 0 30px;
  border-top: 4px solid var(--primary);
}

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

.footer-brand h4 {
  color: #ffffff;
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.footer-col h5 {
  color: #ffffff;
  font-size: 1rem;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h5::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--primary);
}

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

.footer-links a {
  color: #bfaab6;
  font-size: 0.9rem;
}

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

.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
}

.friend-links a {
  color: #bfaab6;
  font-size: 0.85rem;
}

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

.footer-bottom {
  border-top: 1px solid #331728;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: #8f7786;
}

/* Floating Tools */
.float-bar {
  position: fixed;
  right: 20px;
  bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 999;
}

.float-btn {
  width: 46px;
  height: 46px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  color: var(--primary);
  font-weight: bold;
  cursor: pointer;
  transition: var(--transition);
}

.float-btn:hover {
  background: var(--primary);
  color: #ffffff;
}

/* Responsive */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .media-case-box {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    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.active {
    display: flex;
  }
  .menu-toggle {
    display: block;
  }
  .hero-content h1 {
    font-size: 1.9rem;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
}