@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700&family=Inter:wght@300;400;500&display=swap');

:root {
  --bg-page: #0a0808;
  --bg-card: #12100e;
  --bg-elevated: #1a1715;
  --bg-hover: #24211e;
  --text: #e8e3dc;
  --text-dim: #a5a099;
  --text-muted: #736e68;
  --red: #c23b22;
  --red-light: #d44a30;
  --red-dim: #8a2a18;
  --gold: #b8963e;
  --gold-light: #c9a85a;
  --gold-dim: #8a7030;
  --border: #24211e;
  --border-light: #34302c;
  --font-serif: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  --font-sans: 'Inter', 'PingFang SC', -apple-system, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-serif);
  background: var(--bg-page);
  color: var(--text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

#bg-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.portal-wrapper {
  max-width: 580px;
  margin: 0 auto;
  padding: 50px 20px 80px;
  position: relative;
  z-index: 1;
}

.portal-header {
  text-align: center;
  padding: 30px 0 40px;
}

.portal-header .logo-chinese {
  font-size: 52px;
  font-weight: 700;
  letter-spacing: 12px;
  color: var(--red);
  margin-bottom: 6px;
}

.portal-header .logo-sub {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--gold-light);
  letter-spacing: 6px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.portal-header .logo-desc {
  color: var(--text-muted);
  font-size: 13px;
  font-family: var(--font-sans);
  letter-spacing: 3px;
}

.portal-header .hero-divider {
  color: var(--red-dim);
  font-size: 14px;
  letter-spacing: 8px;
  margin-top: 20px;
}

.books {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 30px;
}

.book-card {
  display: flex;
  align-items: stretch;
  gap: 20px;
  padding: 22px 24px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  transition: all 0.3s;
  cursor: pointer;
}

.book-card:hover {
  background: var(--bg-elevated);
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.book-card.disabled {
  opacity: 0.35;
  cursor: default;
  pointer-events: none;
}

.card-number {
  font-family: var(--font-serif);
  font-size: 34px;
  color: var(--gold-dim);
  min-width: 44px;
  text-align: center;
  opacity: 0.6;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-content {
  flex: 1;
}

.card-content h2 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
  letter-spacing: 4px;
}

.book-card:hover .card-content h2 {
  color: var(--red);
}

.card-subtitle {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--gold-dim);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.card-desc {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 8px;
}

.card-link {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--red);
  letter-spacing: 1px;
  opacity: 0;
  transition: all 0.3s;
}

.book-card:hover .card-link {
  opacity: 1;
}

.portal-footer {
  text-align: center;
  padding: 40px 20px;
  margin-top: 40px;
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.portal-footer .author { color: var(--gold-dim); }
.portal-footer .meta {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
  opacity: 0.6;
}

@media (max-width: 600px) {
  .portal-wrapper { padding: 30px 16px 60px; }
  .portal-header .logo-chinese { font-size: 38px; letter-spacing: 8px; }
  .book-card { padding: 18px; gap: 14px; }
  .card-number { font-size: 22px; min-width: 30px; }
  .card-content h2 { font-size: 18px; }
}