:root{--ground:#F4F5F4;--ink:#0B0C0D;--muted:#5b6066;--line:#d6d8d5;--signal:#1B5FD9}
@media (prefers-color-scheme:dark){:root{--ground:#0f1113;--ink:#eceeef;--muted:#9aa0a6;--line:#2a2e33;--signal:#6E9BFF}}
*{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--ink);font:16px/1.5 system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif}
.wrap{max-width:1120px;margin:0 auto;padding:0 16px}
header{display:flex;flex-wrap:wrap;gap:8px 0;justify-content:space-between;align-items:center;padding:18px 0}
nav{display:flex;flex-wrap:wrap;gap:4px 16px}nav a{margin-left:0!important}
header a{color:inherit;text-decoration:none}
.brand{font:600 1.05rem system-ui,sans-serif}.brand span{opacity:.6}
nav a{margin-left:18px;font-size:.95rem;opacity:.8}
h1{font:600 clamp(1.8rem,4vw,2.6rem) system-ui,sans-serif;margin:18px 0 8px;line-height:1.1}
.intro{max-width:660px;margin:0;color:var(--muted)}
.stats{display:flex;flex-wrap:wrap;gap:28px;margin:22px 0}
.stats b{display:block;font:600 2.1rem system-ui,sans-serif;line-height:1}
.stats span{color:var(--muted);font-size:.9rem}
@media (max-width:560px){.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.stats b{font-size:1.7rem}}
.intro,h1{overflow-wrap:anywhere}
.bar{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 12px}
.bar input{flex:1 1 220px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:transparent;color:inherit;font:inherit}
.chip{border:1px solid var(--line);border-radius:999px;padding:6px 12px;background:transparent;color:inherit;font:500 .85rem ui-monospace,SFMono-Regular,Menlo,monospace;cursor:pointer}
.chip[aria-pressed=true]{background:var(--signal);border-color:var(--signal);color:#fff}
#map{height:min(64vh,600px);border-radius:14px;border:1px solid var(--line);background:#eef1f5}
.cities{list-style:none;padding:0;margin:24px 0;display:grid;gap:12px;grid-template-columns:minmax(0,1fr)}
@media (min-width:760px){.cities{grid-template-columns:repeat(3,1fr)}}
.cities li{border-top:2px solid var(--signal);padding-top:8px}
.cities a{color:inherit;text-decoration:none}.cities b{display:block}
.cities span,.small{color:var(--muted);font-size:.88rem}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.78rem;letter-spacing:.04em;text-transform:uppercase}
.leaflet-popup-content{font-family:system-ui,sans-serif;font-size:.92rem}
.leaflet-popup-content a{color:var(--signal)}
.button{display:inline-block;background:var(--ink);color:var(--ground);padding:10px 16px;border-radius:10px;text-decoration:none;font-weight:600}
footer{padding:30px 0 40px}