:root {
  --bg-main: #120d12;
  --bg-card: #1e161e;
  --bg-card-hover: #2a1f2a;
  --primary: #c93748;
  --primary-light: #e85569;
  --text-main: #f5eff5;
  --text-muted: #b59eb5;
  --border: #382638;
  --radius: 16px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(18, 13, 18, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.logo-wrapper img {
  height: 32px;
  width: 32px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--border);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  padding: 10px 24px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.2s, box-shadow 0.2s;
  border: none;
  cursor: pointer;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(201, 55, 72, 0.4);
}

/* Hero */
.hero {
  padding: 60px 0 40px;
  text-align: center;
}
.hero h1 {
  font-size: 32px;
  line-height: 1.3;
  margin-bottom: 16px;
  font-weight: 800;
}
.hero p {
  color: var(--text-muted);
  font-size: 16px;
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.hero-cta .btn { width: 100%; max-width: 280px; padding: 14px 0; font-size: 16px; }

/* Section Common */
.section-title {
  font-size: 24px;
  margin-bottom: 8px;
  text-align: center;
}
.section-desc {
  color: var(--text-muted);
  font-size: 14px;
  text-align: center;
  margin-bottom: 32px;
}

/* Role Square */
.tags-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 24px;
}
.tag-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}
.tag-btn.active, .tag-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.role-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.role-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: background 0.3s;
}
.role-card:hover { background: var(--bg-card-hover); }
.role-img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: top;
}
.role-info {
  padding: 12px;
}
.role-info h3 {
  font-size: 15px;
  margin-bottom: 4px;
}
.role-info p {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Interaction Demo */
.interaction {
  padding: 40px 20px;
  background: var(--bg-card);
  border-radius: var(--radius);
  margin: 40px 20px;
}
.chat-bubble {
  background: var(--bg-main);
  padding: 16px;
  border-radius: 0 16px 16px 16px;
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  max-width: 85%;
}
.chat-bubble.user {
  background: var(--primary);
  color: #fff;
  border-radius: 16px 16px 0 16px;
  margin-left: auto;
  border-color: var(--primary);
}
.features-list {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.feature-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.feature-item span {
  background: var(--primary);
  color: #fff;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: bold;
  flex-shrink: 0;
  margin-top: 2px;
}
.feature-item div h4 {
  font-size: 15px;
  margin-bottom: 2px;
}
.feature-item div p {
  font-size: 13px;
  color: var(--text-muted);
}

/* Creator Center */
.creator-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.creator-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 20px;
  border-radius: var(--radius);
}
.creator-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--primary-light);
}
.creator-card p {
  font-size: 13px;
  color: var(--text-muted);
}

/* Multi-Model */
.model-section {
  padding: 40px 20px;
  text-align: center;
}
.model-section p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 20px;
}
.model-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}
.model-badge {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-main);
}

/* Reviews */
.reviews {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.review-card {
  background: var(--bg-card);
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.review-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 14px;
}
.review-name { font-size: 14px; font-weight: 600; }
.review-text { font-size: 13px; color: var(--text-muted); }

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.faq-item h3 {
  font-size: 15px;
  margin-bottom: 8px;
}
.faq-item p {
  font-size: 13px;
  color: var(--text-muted);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 20px;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}
.footer p { margin-bottom: 8px; }
.update-time {
  font-size: 12px;
  color: #6e5a6e;
  margin-top: 16px;
}

/* Layout adjustments for bigger screens */
@media (min-width: 768px) {
  .hero h1 { font-size: 40px; }
  .hero p { font-size: 18px; }
  .role-grid { grid-template-columns: repeat(3, 1fr); }
  .creator-grid { grid-template-columns: repeat(3, 1fr); }
  .reviews { flex-direction: row; }
  .review-card { flex: 1; }
  .interaction { margin: 40px auto; max-width: 800px; }
}

@media (min-width: 1024px) {
  .hero { padding: 80px 0 60px; }
  .hero h1 { font-size: 48px; }
  .role-grid { grid-template-columns: repeat(4, 1fr); }
  .section-title { font-size: 28px; }
  .interaction-layout {
    display: flex;
    gap: 40px;
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
  }
  .interaction-chat { flex: 1; }
  .features-list { flex: 1; margin-top: 0; }
}