/* ============================================
   北京之夜/之昼 · BEIJING NIGHT / DAY
   双主题变量系统 — 暗黑夜面 vs 天蓝昼面
   ============================================ */

/* ---- 夜面主题 (默认) ---- */
[data-theme="night"] {
  --bg-primary: #08090c;
  --bg-secondary: #111318;
  --bg-tertiary: #1a1d24;
  --bg-card: rgba(255,255,255,0.03);
  --bg-card-hover: rgba(255,255,255,0.06);

  --text-primary: #e8e6e0;
  --text-secondary: #9a958a;
  --text-muted: #555049;

  --accent: #c8102e;
  --accent-bright: #ff1e3c;
  --accent-glow: rgba(200,16,46,0.35);
  --accent-dim: rgba(200,16,46,0.12);

  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.18);

  --grain-opacity: 0.04;
  --grain-blend: overlay;

  --hero-gradient: radial-gradient(ellipse at 50% 30%, #1a1228 0%, #0a0810 40%, #050407 100%);

  --font-display: 'Bodoni Moda', 'Noto Serif SC', serif;
  --font-body: 'Noto Serif SC', 'Songti SC', serif;
  --font-mono: 'Space Mono', monospace;

  --logo-mark: '黑';
  --logo-mark-color: #c8102e;
  --logo-mark-bg: rgba(200,16,46,0.08);
}

/* ---- 昼面主题 ---- */
[data-theme="day"] {
  --bg-primary: #eef4f9;
  --bg-secondary: #e0ecf4;
  --bg-tertiary: #d4e4ef;
  --bg-card: rgba(255,255,255,0.7);
  --bg-card-hover: rgba(255,255,255,0.9);

  --text-primary: #1a2b3c;
  --text-secondary: #5a7088;
  --text-muted: #9ab0c4;

  --accent: #0066cc;
  --accent-bright: #0099ff;
  --accent-glow: rgba(0,102,204,0.25);
  --accent-dim: rgba(0,102,204,0.08);

  --border: rgba(0,40,80,0.1);
  --border-hover: rgba(0,40,80,0.2);

  --grain-opacity: 0.015;
  --grain-blend: multiply;

  --hero-gradient: radial-gradient(ellipse at 50% 40%, #c4dcf0 0%, #e8f0f8 50%, #f5f9fc 100%);

  --font-display: 'Bodoni Moda', 'Noto Serif SC', serif;
  --font-body: 'Noto Serif SC', 'Songti SC', serif;
  --font-mono: 'Space Mono', monospace;

  --logo-mark: '蓝';
  --logo-mark-color: #0066cc;
  --logo-mark-bg: rgba(0,102,204,0.08);
}

/* ---- Reset ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background 0.8s cubic-bezier(0.4,0,0.2,1), color 0.8s cubic-bezier(0.4,0,0.2,1);
}

a { color: inherit; text-decoration: none; }

::selection { background: var(--accent); color: #fff; }

/* ---- 噪点叠加 ---- */
.grain-overlay {
  position: fixed; inset: 0; z-index: 9999; pointer-events: none;
  opacity: var(--grain-opacity);
  mix-blend-mode: var(--grain-blend);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.9' numOctaves='2' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  transition: opacity 0.8s;
}

/* ---- Header ---- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 3rem;
  background: color-mix(in srgb, var(--bg-primary) 85%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all 0.8s cubic-bezier(0.4,0,0.2,1);
}

.logo-area { display: flex; align-items: center; gap: 0.8rem; }

.logo-mark {
  display: flex; align-items: center; justify-content: center;
  width: 42px; height: 42px;
  font-family: var(--font-display);
  font-size: 1.4rem; font-weight: 900;
  color: var(--logo-mark-color);
  background: var(--logo-mark-bg);
  border: 1px solid var(--accent-dim);
  transition: all 0.8s cubic-bezier(0.4,0,0.2,1);
}

.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-cn { font-size: 0.95rem; font-weight: 700; letter-spacing: 2px; }
.logo-en { font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-secondary); letter-spacing: 1px; }

.nav-links { display: flex; gap: 2rem; }
.nav-link {
  font-size: 0.85rem; font-weight: 400; letter-spacing: 1px;
  color: var(--text-secondary);
  position: relative; padding: 0.3rem 0;
  transition: color 0.3s;
}
.nav-link::after {
  content: ''; position: absolute; bottom: 0; left: 0;
  width: 0; height: 1px; background: var(--accent);
  transition: width 0.3s cubic-bezier(0.4,0,0.2,1);
}
.nav-link:hover, .nav-link.active { color: var(--text-primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

/* ---- Theme Toggle ---- */
.theme-toggle {
  display: flex; align-items: center; gap: 0.6rem;
  background: none; border: none; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.7rem;
  color: var(--text-secondary); letter-spacing: 1px;
}

.toggle-track {
  position: relative;
  width: 52px; height: 26px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 13px;
  transition: all 0.4s;
}

.toggle-thumb {
  position: absolute; top: 2px; left: 2px;
  width: 20px; height: 20px;
  background: var(--accent);
  border-radius: 50%;
  transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
  box-shadow: 0 0 12px var(--accent-glow);
}

[data-theme="day"] .toggle-thumb {
  left: 28px;
}

.toggle-label { white-space: nowrap; }

/* ---- Mobile Menu ---- */
.menu-btn {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
}
.menu-btn span {
  width: 24px; height: 2px; background: var(--text-primary);
  transition: all 0.3s;
}

.mobile-menu {
  display: none;
  position: fixed; top: 0; right: -100%;
  width: 280px; height: 100vh; z-index: 999;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  padding: 6rem 2rem 2rem;
  flex-direction: column; gap: 1.5rem;
  transition: right 0.4s cubic-bezier(0.4,0,0.2,1);
}
.mobile-menu.open { right: 0; }
.mobile-menu .nav-link { font-size: 1.1rem; }

/* ---- Hero ---- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute; inset: 0;
  background: var(--hero-gradient);
  transition: background 0.8s cubic-bezier(0.4,0,0.2,1);
}

/* 夜面星空粒子 */
.hero-bg::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 60% 20%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 80% 50%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 30% 70%, rgba(255,255,255,0.3), transparent),
    radial-gradient(2px 2px at 70% 80%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 45% 15%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 90% 35%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 15% 55%, rgba(255,255,255,0.4), transparent);
  opacity: 1;
  transition: opacity 0.8s;
}

[data-theme="day"] .hero-bg::before { opacity: 0; }

/* 昼面云朵光晕 */
.hero-bg::after {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 600px 200px at 30% 20%, rgba(255,255,255,0.4), transparent),
    radial-gradient(ellipse 800px 300px at 70% 30%, rgba(255,255,255,0.3), transparent);
  opacity: 0;
  transition: opacity 0.8s;
}

[data-theme="day"] .hero-bg::after { opacity: 1; }

.hero-content {
  position: relative; z-index: 2;
  text-align: center; max-width: 800px;
  padding: 0 2rem;
}

.hero-time {
  display: flex; align-items: center; justify-content: center; gap: 1rem;
  margin-bottom: 2rem;
}

.time-period {
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 4px; color: var(--accent);
  text-transform: uppercase;
  padding: 0.3rem 1rem;
  border: 1px solid var(--accent-dim);
  background: var(--accent-dim);
}

.time-clock {
  font-family: var(--font-mono); font-size: 0.8rem;
  color: var(--text-secondary); letter-spacing: 2px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  font-weight: 900; line-height: 1.15;
  margin-bottom: 1.5rem;
}

.title-line { display: block; }

.title-accent {
  font-style: italic; font-weight: 400;
  color: var(--accent);
  text-shadow: 0 0 30px var(--accent-glow);
}

.hero-subtitle {
  font-size: 1.05rem; line-height: 1.9;
  color: var(--text-secondary);
  max-width: 580px; margin: 0 auto 2.5rem;
}

.hero-actions {
  display: flex; gap: 1rem; justify-content: center;
  margin-bottom: 4rem;
}

.btn-primary {
  padding: 0.9rem 2.5rem;
  font-family: var(--font-mono); font-size: 0.75rem;
  letter-spacing: 2px; text-transform: uppercase;
  background: var(--accent); color: #fff;
  border: 1px solid var(--accent);
  transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--accent-bright);
  box-shadow: 0 0 30px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-secondary {
  padding: 0.9rem 2.5rem;
  font-family: var(--font-mono); font-size: 0.75rem;
  letter-spacing: 2px; text-transform: uppercase;
  background: transparent; color: var(--text-primary);
  border: 1px solid var(--border-hover);
  transition: all 0.3s;
  cursor: pointer;
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-scroll-hint {
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
}

.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, transparent, var(--text-secondary));
  animation: scrollHint 2s ease-in-out infinite;
}

@keyframes scrollHint {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

.scroll-text {
  font-family: var(--font-mono); font-size: 0.6rem;
  letter-spacing: 3px; color: var(--text-muted);
  text-transform: uppercase;
}

/* ---- Section Common ---- */
section { padding: 6rem 3rem; position: relative; }

.section-header {
  max-width: 1200px; margin: 0 auto 3rem;
  display: flex; align-items: baseline; gap: 1.5rem;
  flex-wrap: wrap;
}

.section-num {
  font-family: var(--font-mono); font-size: 0.8rem;
  color: var(--accent); letter-spacing: 2px;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 0.2rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
}

.section-desc {
  flex-basis: 100%;
  font-size: 0.95rem; color: var(--text-secondary);
  max-width: 600px; margin-top: 0.5rem;
}

/* ---- Venues ---- */
.venue-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.venue-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2rem;
  transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
  position: relative; overflow: hidden;
}

.venue-card::before {
  content: ''; position: absolute; top: 0; left: 0;
  width: 3px; height: 0; background: var(--accent);
  transition: height 0.4s cubic-bezier(0.4,0,0.2,1);
}

.venue-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
}
.venue-card:hover::before { height: 100%; }

.venue-cat {
  font-family: var(--font-mono); font-size: 0.65rem;
  letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 0.8rem;
}

.venue-name {
  font-family: var(--font-display);
  font-size: 1.3rem; font-weight: 700;
  margin-bottom: 0.3rem;
}

.venue-addr {
  font-size: 0.8rem; color: var(--text-muted);
  margin-bottom: 1rem;
}

.venue-desc {
  font-size: 0.9rem; line-height: 1.8;
  color: var(--text-secondary);
}

.venue-hours {
  margin-top: 1.2rem; padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono); font-size: 0.7rem;
  color: var(--text-muted); letter-spacing: 1px;
}

/* ---- Gallery ---- */
.gallery { background: var(--bg-secondary); transition: background 0.8s; }

.gallery-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 120px;
  gap: 1rem;
}

.gallery-item {
  position: relative; overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.4s;
}

.gallery-item:nth-child(1) { grid-column: span 6; grid-row: span 3; }
.gallery-item:nth-child(2) { grid-column: span 3; grid-row: span 2; }
.gallery-item:nth-child(3) { grid-column: span 3; grid-row: span 2; }
.gallery-item:nth-child(4) { grid-column: span 4; grid-row: span 2; }
.gallery-item:nth-child(5) { grid-column: span 4; grid-row: span 2; }
.gallery-item:nth-child(6) { grid-column: span 4; grid-row: span 2; }
.gallery-item:nth-child(7) { grid-column: span 3; grid-row: span 2; }
.gallery-item:nth-child(8) { grid-column: span 6; grid-row: span 2; }
.gallery-item:nth-child(9) { grid-column: span 3; grid-row: span 2; }

.gallery-img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4,0,0.2,1);
}

.gallery-item:hover .gallery-img { transform: scale(1.05); }

.gallery-caption {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 1.5rem 1rem 1rem;
  background: linear-gradient(to top, rgba(0,0,0,0.85), transparent);
  color: #fff;
}

.gallery-caption .cap-title {
  font-family: var(--font-display); font-size: 0.95rem; font-weight: 700;
}

.gallery-caption .cap-loc {
  font-family: var(--font-mono); font-size: 0.6rem;
  letter-spacing: 1px; opacity: 0.7; margin-top: 0.2rem;
}

/* ---- Stories ---- */
.story-list {
  max-width: 900px; margin: 0 auto;
}

.story-item {
  display: grid; grid-template-columns: 80px 1fr;
  gap: 2rem; padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
  transition: all 0.3s;
}

.story-item:last-child { border-bottom: none; }

.story-num {
  font-family: var(--font-mono); font-size: 0.8rem;
  color: var(--accent); letter-spacing: 1px;
  padding-top: 0.3rem;
}

.story-quote {
  font-family: var(--font-display);
  font-size: 1.25rem; font-style: italic; font-weight: 400;
  line-height: 1.6; margin-bottom: 0.8rem;
  color: var(--text-primary);
}

.story-author {
  font-size: 0.8rem; color: var(--text-secondary);
}
.story-author .author-name { color: var(--accent); font-weight: 700; }

/* ---- Map ---- */
.map-section { background: var(--bg-secondary); transition: background 0.8s; }

.map-container {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 240px; gap: 2rem;
}

.map-canvas {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2rem; min-height: 400px;
  position: relative;
}

.map-canvas svg { width: 100%; height: auto; }

.map-legend {
  display: flex; flex-direction: column; gap: 0.8rem;
}

.legend-item {
  display: flex; align-items: center; gap: 0.8rem;
  font-size: 0.85rem; color: var(--text-secondary);
  padding: 0.6rem 1rem;
  border: 1px solid var(--border);
  transition: all 0.3s;
  cursor: pointer;
}
.legend-item:hover { border-color: var(--accent); color: var(--text-primary); }

.legend-dot {
  width: 10px; height: 10px; border-radius: 50%;
  flex-shrink: 0;
}

/* ---- Cross-link ---- */
.cross-link {
  padding: 5rem 3rem;
  text-align: center;
}

.cross-content {
  max-width: 700px; margin: 0 auto;
}

.cross-label {
  font-family: var(--font-mono); font-size: 0.65rem;
  letter-spacing: 4px; color: var(--text-muted);
  text-transform: uppercase; margin-bottom: 1rem; display: block;
}

.cross-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700; margin-bottom: 1rem;
}

.cross-desc {
  font-size: 0.95rem; color: var(--text-secondary);
  margin-bottom: 2rem;
}

.cross-cta {
  display: inline-flex; align-items: center; gap: 0.8rem;
  padding: 1rem 2.5rem;
  font-family: var(--font-mono); font-size: 0.75rem;
  letter-spacing: 2px; text-transform: uppercase;
  border: 1px solid var(--accent);
  color: var(--accent);
  transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}
.cross-cta:hover {
  background: var(--accent); color: #fff;
  box-shadow: 0 0 30px var(--accent-glow);
}

.cta-arrow { transition: transform 0.3s; }
.cross-cta:hover .cta-arrow { transform: translateX(4px); }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 3rem;
  background: var(--bg-primary);
  transition: all 0.8s;
}

.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: auto 1fr auto;
  gap: 2rem; align-items: center;
}

.footer-brand { display: flex; align-items: center; gap: 0.6rem; }

.footer-mark {
  font-family: var(--font-display); font-size: 1.1rem; font-weight: 900;
  color: var(--logo-mark-color);
}

.footer-domain {
  font-family: var(--font-mono); font-size: 0.75rem;
  color: var(--text-secondary); letter-spacing: 1px;
}

.footer-links {
  display: flex; gap: 1.5rem; justify-content: center;
}
.footer-links a {
  font-size: 0.8rem; color: var(--text-secondary);
  transition: color 0.3s;
}
.footer-links a:hover { color: var(--accent); }

.footer-copy {
  text-align: right;
  display: flex; flex-direction: column; gap: 0.3rem;
}
.footer-copy span { font-size: 0.7rem; color: var(--text-muted); }
.footer-tagline { font-family: var(--font-body); }

/* ---- Animations ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in { animation: fadeUp 0.8s cubic-bezier(0.4,0,0.2,1) both; }
.fade-in:nth-child(2) { animation-delay: 0.1s; }
.fade-in:nth-child(3) { animation-delay: 0.2s; }
.fade-in:nth-child(4) { animation-delay: 0.3s; }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .site-header { padding: 1rem 1.5rem; }
  .nav-links { display: none; }
  .menu-btn { display: flex; }
  .mobile-menu { display: flex; }
  .toggle-label { display: none; }
  section { padding: 4rem 1.5rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .gallery-grid { grid-template-columns: repeat(6, 1fr); grid-auto-rows: 100px; }
  .gallery-item:nth-child(n) { grid-column: span 3; grid-row: span 2; }
  .map-container { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; }
  .footer-copy { text-align: center; }
  .footer-links { flex-wrap: wrap; }
  .story-item { grid-template-columns: 1fr; gap: 0.5rem; }
}

@media (max-width: 500px) {
  .hero-title { font-size: 2rem; }
  .venue-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-item:nth-child(n) { grid-column: span 2; grid-row: span 2; }
  .hero-actions { gap: 0.6rem; }
  .btn-primary, .btn-secondary { padding: 0.8rem 1.8rem; font-size: 0.7rem; }
}

/* ---- 商家推荐 ---- */
.shops { background: var(--bg-secondary); transition: background 0.8s; }

.shop-filters {
  max-width: 1200px; margin: 0 auto 2rem;
  display: flex; gap: 2rem; flex-wrap: wrap;
}

.filter-group { display: flex; align-items: center; gap: 0.6rem; }

.filter-label {
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 1px; color: var(--text-muted);
  text-transform: uppercase; white-space: nowrap;
}

.filter-tags { display: flex; gap: 0.4rem; flex-wrap: wrap; }

.filter-tag {
  padding: 0.35rem 0.9rem;
  font-family: var(--font-mono); font-size: 0.65rem;
  letter-spacing: 0.5px; color: var(--text-secondary);
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  transition: all 0.3s;
}
.filter-tag:hover { border-color: var(--accent); color: var(--accent); }
.filter-tag.active {
  background: var(--accent); color: #fff;
  border-color: var(--accent);
}

.shop-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.2rem;
}

.shop-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 1.5rem;
  transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
  position: relative;
}

.shop-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.shop-card-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 0.6rem;
}

.shop-name {
  font-family: var(--font-display);
  font-size: 1.15rem; font-weight: 700;
}

.shop-rating {
  font-family: var(--font-mono); font-size: 0.75rem;
  color: var(--accent); white-space: nowrap;
}

.shop-meta {
  display: flex; gap: 0.8rem; align-items: center;
  font-size: 0.75rem; color: var(--text-muted);
  margin-bottom: 0.8rem;
}

.shop-cat-tag {
  font-family: var(--font-mono); font-size: 0.6rem;
  letter-spacing: 1px; text-transform: uppercase;
  color: var(--accent); border: 1px solid var(--accent-dim);
  padding: 0.15rem 0.5rem;
}

.shop-price { color: var(--text-muted); }

.shop-desc {
  font-size: 0.85rem; line-height: 1.7;
  color: var(--text-secondary); margin-bottom: 0.8rem;
}

.shop-tags {
  display: flex; gap: 0.4rem; flex-wrap: wrap;
}

.shop-tag {
  font-size: 0.65rem; color: var(--text-muted);
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--border);
}

/* ---- 活动消息 ---- */
.events { transition: background 0.8s; }

.event-list {
  max-width: 900px; margin: 0 auto;
}

.event-group-title {
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 3px; color: var(--accent);
  text-transform: uppercase;
  margin: 2rem 0 1rem; padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.event-item {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  gap: 1.5rem; align-items: center;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  transition: all 0.3s;
}
.event-item:hover { padding-left: 1rem; }

.event-item.featured {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
}

.event-date {
  font-family: var(--font-mono); font-size: 0.75rem;
  color: var(--text-secondary); line-height: 1.6;
}
.event-date .event-day {
  font-size: 1.4rem; font-weight: 700;
  color: var(--text-primary); display: block;
}

.event-body h3 {
  font-family: var(--font-display);
  font-size: 1.1rem; font-weight: 700;
  margin-bottom: 0.3rem;
}

.event-body p {
  font-size: 0.85rem; color: var(--text-secondary);
  line-height: 1.6;
}

.event-meta {
  font-size: 0.75rem; color: var(--text-muted);
  margin-top: 0.3rem;
}

.event-tags {
  display: flex; gap: 0.3rem; margin-top: 0.4rem;
}

.event-tag {
  font-size: 0.6rem; color: var(--accent);
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--accent-dim);
}

.event-status {
  font-family: var(--font-mono); font-size: 0.65rem;
  letter-spacing: 1px; white-space: nowrap;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--accent-dim);
  color: var(--accent);
}

/* ---- AI 推荐 ---- */
.ai-section { background: var(--bg-secondary); transition: background 0.8s; }

.ai-container {
  max-width: 700px; margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  overflow: hidden;
}

.chat-window {
  min-height: 360px; max-height: 500px;
  overflow-y: auto; padding: 1.5rem;
  display: flex; flex-direction: column;
}

.chat-messages {
  flex: 1; display: flex; flex-direction: column;
  gap: 1rem;
}

.chat-msg {
  max-width: 85%; padding: 0.8rem 1.2rem;
  font-size: 0.9rem; line-height: 1.7;
  animation: fadeUp 0.4s both;
}

.chat-msg.bot {
  align-self: flex-start;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
}

.chat-msg.user {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
}

.chat-msg .msg-label {
  font-family: var(--font-mono); font-size: 0.6rem;
  letter-spacing: 1px; text-transform: uppercase;
  opacity: 0.6; margin-bottom: 0.3rem;
}

.chat-msg .msg-recommendations {
  margin-top: 0.8rem;
  display: flex; flex-direction: column; gap: 0.5rem;
}

.msg-rec-item {
  padding: 0.5rem 0.8rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 0.85rem;
}
.msg-rec-item .rec-name {
  font-weight: 700; color: var(--accent);
}
.msg-rec-item .rec-reason {
  font-size: 0.8rem; color: var(--text-secondary);
  margin-top: 0.2rem;
}

.chat-suggestions {
  display: flex; gap: 0.5rem; flex-wrap: wrap;
  margin-top: 1rem; padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.chat-suggestion {
  padding: 0.4rem 0.9rem;
  font-size: 0.75rem; color: var(--text-secondary);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.3s;
  background: none;
}
.chat-suggestion:hover {
  border-color: var(--accent); color: var(--accent);
}

.chat-input-area {
  display: flex; border-top: 1px solid var(--border);
}

.chat-input {
  flex: 1; padding: 1rem 1.2rem;
  font-family: var(--font-body);
  font-size: 0.9rem; color: var(--text-primary);
  background: transparent;
  border: none; outline: none;
}
.chat-input::placeholder { color: var(--text-muted); }

.chat-send {
  padding: 1rem 1.5rem;
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 2px; text-transform: uppercase;
  background: var(--accent); color: #fff;
  border: none; cursor: pointer;
  transition: background 0.3s;
}
.chat-send:hover { background: var(--accent-bright); }

.chat-typing {
  align-self: flex-start;
  font-size: 0.8rem; color: var(--text-muted);
  padding: 0.5rem 0;
}
.chat-typing span {
  animation: typingDots 1.4s infinite;
}
.chat-typing span:nth-child(2) { animation-delay: 0.2s; }
.chat-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingDots {
  0%, 60%, 100% { opacity: 0.3; }
  30% { opacity: 1; }
}

/* AI responsive */
@media (max-width: 900px) {
  .shop-grid { grid-template-columns: 1fr; }
  .shop-filters { gap: 1rem; }
  .event-item { grid-template-columns: 1fr; gap: 0.5rem; }
  .event-date .event-day { font-size: 1rem; display: inline; }
  .ai-container { margin: 0 1rem; }
}

@media (max-width: 500px) {
  .filter-tags { gap: 0.3rem; }
  .filter-tag { padding: 0.25rem 0.6rem; font-size: 0.6rem; }
  .chat-window { min-height: 280px; padding: 1rem; }
  .chat-suggestions { gap: 0.3rem; }
}