:root {
  --paper: #f4ead4;
  --paper-2: #ebe0c6;
  --ink: #1b140e;
  --ink-soft: #5a4a38;
  --ink-faint: #8a7460;
  --cinnabar: #9c1c2b;
  --gold: #8a6a28;
  --line: rgba(28, 20, 14, 0.12);
  --serif: "Songti SC", "Noto Serif SC", "STSong", "SimSun", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --nav-h: 58px;
  --safe-b: env(safe-area-inset-bottom, 0px);
}
[data-theme="dark"] {
  --paper: #16110d;
  --paper-2: #1e1812;
  --ink: #f3e6cc;
  --ink-soft: #cbb99a;
  --ink-faint: #8e7b63;
  --cinnabar: #e25a5a;
  --gold: #d4b46a;
  --line: rgba(243, 230, 204, 0.12);
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); }
body { padding-bottom: calc(var(--nav-h) + var(--safe-b)); }
button { font-family: inherit; cursor: pointer; }
img { max-width: 100%; display: block; }

.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 8px;
  padding: calc(8px + env(safe-area-inset-top, 0px)) 14px 8px;
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.brand { font-family: var(--serif); font-size: 18px; letter-spacing: 0.28em; text-decoration: none; color: inherit; }
.spacer { flex: 1; }
.pill {
  font-size: 12px; padding: 5px 10px; border-radius: 999px;
  background: var(--paper-2); border: 1px solid var(--line); color: var(--ink-soft);
}
.icon-btn {
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--paper-2); color: var(--ink);
}

.nav {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 30;
  height: calc(var(--nav-h) + var(--safe-b));
  padding-bottom: var(--safe-b);
  display: grid; grid-template-columns: 1fr 1fr 1fr;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--line);
}
.nav a {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px; text-decoration: none; color: var(--ink-faint); font-size: 12px; letter-spacing: 0.12em;
}
.nav a.on { color: var(--cinnabar); }

/* Tour */
.tour { max-width: 720px; margin: 0 auto; }
.pic {
  background: #1a120c;
  min-height: 220px;
  display: grid; place-items: center;
}
.pic img { width: 100%; height: auto; max-height: 52dvh; object-fit: contain; background: #1a120c; }
.ph {
  width: 100%; min-height: 220px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; color: #e8d7b0; padding: 32px 16px; text-align: center;
  background:
    radial-gradient(ellipse at 50% 30%, #3a2a18 0%, #1a120c 70%);
}
.ph b { font-family: var(--serif); font-size: 28px; letter-spacing: 0.16em; }
.ph span { font-size: 13px; opacity: 0.7; }

.body { padding: 16px 18px 28px; }
.kicker { font-size: 12px; letter-spacing: 0.18em; color: var(--cinnabar); }
h1 { font-family: var(--serif); font-size: clamp(26px, 7vw, 36px); margin: 6px 0 4px; letter-spacing: 0.08em; }
.who { color: var(--ink-soft); margin-bottom: 8px; }
.meta { font-size: 13px; color: var(--ink-faint); }
.badges { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0; }
.badge {
  font-size: 11px; letter-spacing: 0.08em; padding: 3px 8px; border-radius: 999px;
  border: 1px solid var(--cinnabar); color: var(--cinnabar);
}
.badge.loan { border-color: var(--gold); color: var(--gold); }
.look {
  background: var(--paper-2); border-left: 3px solid var(--cinnabar);
  padding: 12px 14px; margin: 14px 0; font-size: 15px; line-height: 1.7;
}
.intro p { line-height: 1.8; color: var(--ink-soft); margin: 0 0 12px; font-size: 15px; }
.actions {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 8px;
}
.btn {
  appearance: none; border: 0; min-height: 46px; border-radius: 999px;
  background: var(--cinnabar); color: #f8eee0; font-size: 15px; letter-spacing: 0.08em;
}
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn:disabled { opacity: 0.35; }

/* Map */
.map-page { padding: 8px 0 20px; }
.map-hint { padding: 4px 16px 10px; font-size: 13px; color: var(--ink-faint); line-height: 1.6; }
.map-stage {
  position: relative;
  overflow: auto;
  max-height: calc(100dvh - 160px);
  -webkit-overflow-scrolling: touch;
  background: #efe4c8;
}
.map-stage .inner { position: relative; width: min(100%, 900px); margin: 0 auto; }
.map-stage img.floor { width: 100%; height: auto; display: block; }
.pin {
  position: absolute; transform: translate(-50%, -50%);
  width: 28px; height: 28px; border-radius: 50%;
  border: 2px solid #f4ead4; background: #1b140e; color: #f8eee0;
  font-size: 11px; font-family: var(--serif);
  display: grid; place-items: center; padding: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,.35);
}
.pin.forbid { background: var(--cinnabar); }
.pin.seen { background: var(--gold); }
.pin.on { outline: 3px solid #e7cf96; z-index: 2; }
.pin.g { width: 44px; border-radius: 14px; font-size: 10px; }

/* Catalog */
.wrap { padding: 12px 14px 24px; max-width: 860px; margin: 0 auto; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.chip {
  border: 1px solid var(--line); background: var(--paper-2); color: var(--ink-soft);
  border-radius: 999px; padding: 6px 12px; font-size: 13px;
}
.chip.on { background: var(--cinnabar); color: #fff6ea; border-color: transparent; }
.grid { display: grid; grid-template-columns: 1fr; gap: 8px; }
.card {
  display: grid; grid-template-columns: 96px 1fr; gap: 10px;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 12px;
  overflow: hidden; text-align: left; color: inherit; padding: 0; width: 100%;
}
.card .th {
  width: 96px; height: 96px; object-fit: cover; background: #2a1c12;
}
.card .th.ph {
  min-height: 96px; font-size: 20px; letter-spacing: 0.12em;
}
.card .info { padding: 10px 10px 10px 0; }
.card .name { font-family: var(--serif); font-size: 17px; }
.card .sub { font-size: 12px; color: var(--ink-faint); margin-top: 2px; }

.unit-h { font-family: var(--serif); letter-spacing: 0.16em; color: var(--cinnabar); margin: 16px 0 8px; }
.muted { color: var(--ink-faint); font-size: 13px; }