:root {
  --u-primary:       #3b82f6;
  --u-primary-dark:  #2563eb;
  --u-primary-light: #eff6ff;
  --u-primary-glow:  rgba(59,130,246,0.18);

  --u-jade:          #10b981;
  --u-jade-light:    #ecfdf5;

  --u-cinnabar:      #ef4444;
  --u-text:          #111827;
  --u-text-2:        #4b5563;
  --u-muted:         #9ca3af;

  --u-bg:            #f7f8fa;
  --u-card:          #ffffff;
  --u-card-2:        #f9fafb;
  --u-border:        #e5e7eb;
  --u-border-strong: #d1d5db;

  --u-danger:        #ef4444;
  --u-warning:       #f59e0b;

  --u-radius:        14px;
  --u-radius-lg:     20px;
  --u-nav-h:         56px;
  --u-tab-h:         62px;

  --u-font:  'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;

  --u-shadow:       0 10px 30px -12px rgba(17,24,39,0.14);
  --u-shadow-soft:  0 4px 16px -8px rgba(17,24,39,0.10);
  --u-shadow-card:  0 1px 3px rgba(17,24,39,0.06);

  color-scheme: light;
}

html[data-theme="dark"] {
  --u-primary:       #60a5fa;
  --u-primary-dark:  #3b82f6;
  --u-primary-light: #1e293b;
  --u-primary-glow:  rgba(96,165,250,0.22);

  --u-jade:          #34d399;
  --u-jade-light:    #064e3b;

  --u-cinnabar:      #f87171;
  --u-text:          #f3f4f6;
  --u-text-2:        #9ca3af;
  --u-muted:         #6b7280;

  --u-bg:            #0f1115;
  --u-card:          #171a1f;
  --u-card-2:        #1c2027;
  --u-border:        #262a31;
  --u-border-strong: #363b44;

  --u-shadow:       0 10px 30px -12px rgba(0,0,0,0.6);
  --u-shadow-soft:  0 4px 16px -8px rgba(0,0,0,0.5);
  --u-shadow-card:  0 1px 3px rgba(0,0,0,0.35);

  color-scheme: dark;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { height: 100%; background: var(--u-bg); transition: background .3s ease; }

body {
  font-family: var(--u-font);
  background: var(--u-bg);
  color: var(--u-text);
  font-size: 14px;
  line-height: 1.7;
  max-width: 520px;
  margin: 0 auto;
  min-height: 100vh;
  padding-top: var(--u-nav-h);
  padding-bottom: var(--u-tab-h);
  -webkit-font-smoothing: antialiased;
  transition: background .3s ease, color .3s ease;
}
body.no-tabbar { padding-bottom: 0; }
body.no-navbar { padding-top: 0; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { font-weight: 700; letter-spacing: 0.5px; }

.u-navbar {
  position: fixed;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 100%; max-width: 520px;
  height: var(--u-nav-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  color: var(--u-text);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 18px;
  z-index: 100;
  border-bottom: 1px solid var(--u-border);
  transition: background .3s ease, border-color .3s ease;
}
html[data-theme="dark"] .u-navbar { background: rgba(23,26,31,0.92); }
.u-navbar .u-nav-left {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--u-text); flex: 1; min-width: 0;
}
.u-navbar .u-nav-left i { font-size: 15px; color: var(--u-primary); }
.u-navbar .u-location {
  font-weight: 600; flex-shrink: 0; max-width: 90px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.u-navbar .u-divider {
  width: 1px; height: 16px;
  background: var(--u-border);
  margin: 0 6px; flex-shrink: 0;
}
.u-navbar .u-slogan {
  color: var(--u-muted); font-size: 11.5px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  flex: 1; min-width: 0;
}
.u-navbar.inner {
  background: var(--u-card);
  border-bottom: 1px solid var(--u-border);
}
.u-navbar.inner .u-back {
  display: flex; align-items: center; gap: 4px;
  font-size: 14px; color: var(--u-text-2);
}
.u-navbar.inner .u-back i { color: var(--u-primary); }
.u-navbar.inner .u-nav-title {
  position: absolute; left: 50%; transform: translateX(-50%);
  font-size: 16px; font-weight: 700; color: var(--u-text);
}
.u-navbar.inner .u-search { color: var(--u-primary); font-size: 16px; }

.u-tabbar {
  position: fixed; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 100%; max-width: 520px;
  height: var(--u-tab-h);
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  display: flex;
  border-top: 1px solid var(--u-border);
  z-index: 100;
  padding-bottom: env(safe-area-inset-bottom, 0);
  transition: background .3s ease, border-color .3s ease;
}
html[data-theme="dark"] .u-tabbar { background: rgba(23,26,31,0.96); }
.u-tabbar a {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 3px; color: var(--u-muted); font-size: 11px;
  transition: color 0.22s ease; position: relative;
}
.u-tabbar a i { font-size: 19px; transition: transform 0.22s, color 0.22s; }
.u-tabbar a.active { color: var(--u-primary); font-weight: 600; }
.u-tabbar a.active i { transform: translateY(-1px); }

.u-tab-badge {
  position: absolute;
  top: 6px; left: 50%;
  transform: translateX(6px);
  min-width: 16px; height: 16px;
  padding: 0 4px; border-radius: 999px;
  background: var(--u-cinnabar); color: #fff;
  font-size: 10px; font-weight: 700; line-height: 16px;
  text-align: center;
  box-shadow: 0 0 0 2px var(--u-card);
  pointer-events: none;
}

.u-main { padding: 0 0 20px; }

.u-section {
  background: var(--u-card);
  margin: 12px 16px;
  border-radius: var(--u-radius-lg);
  padding: 20px 16px;
  border: 1px solid var(--u-border);
  box-shadow: var(--u-shadow-card);
}
.u-section-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.u-section-head h3 {
  font-size: 16px; font-weight: 700; color: var(--u-text);
  display: flex; align-items: center; gap: 8px;
}
.u-section-head h3 i { color: var(--u-primary); font-size: 15px; }
.u-section-head .u-more {
  font-size: 12px; color: var(--u-muted);
  display: flex; align-items: center; gap: 4px;
  padding: 4px 10px; border-radius: 999px;
  transition: all 0.2s ease;
}
.u-section-head .u-more:hover {
  color: var(--u-primary); background: var(--u-primary-light);
}

.u-empty {
  text-align: center; padding: 40px 20px;
  color: var(--u-muted); font-size: 13px;
}
.u-empty i { font-size: 40px; color: var(--u-border-strong); display: block; margin-bottom: 12px; }

.u-btn {
  display: inline-block;
  padding: 10px 24px; border-radius: 999px;
  font-size: 13px; font-weight: 600;
  border: none; cursor: pointer; transition: all 0.2s ease;
}
.u-btn-primary { background: var(--u-primary); color: #fff; }
.u-btn-primary:hover { background: var(--u-primary-dark); }

.u-theme-btn {
  width: 34px; height: 34px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--u-card-2); color: var(--u-text-2);
  border: 1px solid var(--u-border);
  cursor: pointer; flex-shrink: 0;
  transition: all .2s ease;
}
.u-theme-btn:hover {
  background: var(--u-primary-light);
  color: var(--u-primary);
  border-color: var(--u-primary);
}
.u-theme-btn i { font-size: 14px; }

.u-theme-mask {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.35);
  z-index: 999;
  opacity: 0; pointer-events: none;
  transition: opacity .25s ease;
}
.u-theme-mask.show { opacity: 1; pointer-events: auto; }

.u-theme-panel {
  position: fixed;
  left: 50%; bottom: 0;
  transform: translate(-50%, 100%);
  width: 100%; max-width: 520px;
  background: var(--u-card);
  border-radius: 20px 20px 0 0;
  padding: 24px 20px calc(24px + env(safe-area-inset-bottom, 0));
  z-index: 1000;
  transition: transform .3s cubic-bezier(.34,1.2,.64,1), background .3s ease;
  border-top: 1px solid var(--u-border);
}
.u-theme-panel.show { transform: translate(-50%, 0); }

.u-theme-panel .title {
  font-size: 15px; font-weight: 700;
  color: var(--u-text);
  margin: 0 0 16px 4px;
}

.u-color-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px 10px;
}

.u-color-item {
  display: flex; flex-direction: column;
  align-items: center; gap: 8px;
  cursor: pointer;
  transition: transform .2s ease;
}
.u-color-item:hover { transform: translateY(-2px); }

.u-color-dot {
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 2px solid transparent;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: #fff;
  box-shadow: 0 2px 8px -2px rgba(0,0,0,0.15);
  transition: all .2s ease;
}
.u-color-item.active .u-color-dot {
  border-color: var(--u-text);
  box-shadow: 0 0 0 3px var(--u-card), 0 0 0 5px var(--u-text);
}
.u-color-item .u-color-name {
  font-size: 11px;
  color: var(--u-text-2);
  letter-spacing: 0.3px;
  white-space: nowrap;
}
.u-color-item.active .u-color-name {
  color: var(--u-text);
  font-weight: 600;
}

.u-color-dot.dot-light {
  background: #ffffff;
  color: #f59e0b;
  border: 2px solid var(--u-border);
}
.u-color-dot.dot-dark {
  background: #171a1f;
  color: #fbbf24;
}
.u-color-dot.dot-random {
  background: conic-gradient(#ef4444, #f97316, #f59e0b, #10b981, #3b82f6, #8b5cf6, #ec4899, #ef4444);
  color: #fff;
  text-shadow: 0 1px 2px rgba(0,0,0,.4);
}

@media (max-width: 768px) {
  ::-webkit-scrollbar { width: 0 !important; height: 0 !important; display: none !important; }
  html, body {
    scrollbar-width: none;
    -ms-overflow-style: none;
    -webkit-overflow-scrolling: touch;
  }
}