:root {
  --bg: #0b0f19; --bg2: #121a2b; --bg3: #1a2438; --line: #263247;
  --fg: #e6edf3; --fg2: #9fb0c3; --fg3: #6b7a90; --accent: #ffd166;
  --radius: 14px; --pad: 16px; --maxw: 1080px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 -apple-system, "PingFang SC", "Helvetica Neue", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif; }
h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: 0.01em; }
a { color: var(--accent); }
code { background: var(--bg3); padding: 1px 6px; border-radius: 6px; font-size: 0.9em; }
.small { color: var(--fg3); font-size: 0.85em; }
button { font: inherit; color: inherit; }

/* hero map */
.hero { position: relative; height: 62svh; min-height: 380px; max-height: 720px; overflow: hidden; background: var(--bg2); }
@media (min-width: 900px) { .hero { height: 72vh; } }
.map { position: absolute; inset: 0; }
.hero-title { position: absolute; left: var(--pad); top: calc(var(--pad) + env(safe-area-inset-top)); pointer-events: none; text-shadow: 0 2px 12px rgba(0,0,0,0.8); }
.hero-title h1 { font-size: 40px; line-height: 1.1; }
.hero-title .sub { margin: 4px 0 0; color: var(--fg2); font-size: 15px; }
.legend { position: absolute; right: var(--pad); bottom: var(--pad); display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--fg2); background: rgba(11,15,25,0.72); padding: 8px 10px; border-radius: 10px; backdrop-filter: blur(6px); }
.lg::before { content: ""; display: inline-block; width: 26px; height: 0; margin-right: 8px; vertical-align: middle; border-top: 3px solid var(--fg); }
.lg-dash::before { border-top-style: dashed; opacity: 0.8; }
.map-touch { position: absolute; left: var(--pad); bottom: var(--pad); z-index: 5; border: 1px solid rgba(255,255,255,0.25); background: rgba(11,15,25,0.75); color: var(--fg); border-radius: 999px; padding: 8px 14px; font-size: 13px; backdrop-filter: blur(6px); cursor: pointer; }
.map-touch[aria-pressed="true"] { background: var(--accent); color: #0b0f19; border-color: var(--accent); }
.map-touch[hidden] { display: none; }
.geo-banner { position: absolute; left: 50%; transform: translateX(-50%); bottom: calc(var(--pad) + 44px); margin: 0; z-index: 5; font-size: 12px; color: #0b0f19; background: var(--accent); padding: 4px 10px; border-radius: 999px; white-space: nowrap; }
.geo-banner[hidden] { display: none; }
.map-fallback { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; padding: var(--pad); background: linear-gradient(180deg, #0f1626, #0b0f19); }
.map-fallback[hidden] { display: none; }

/* markers (rendered inside AMap) */
.pin { position: relative; transform: translate(-50%, -50%); white-space: nowrap; pointer-events: none; }
.pin i { display: block; width: 12px; height: 12px; border-radius: 50%; background: var(--c); box-shadow: 0 0 0 3px rgba(255,255,255,0.15), 0 0 14px var(--c); }
.pin span { position: absolute; left: 16px; top: -3px; font-size: 12px; font-weight: 600; color: #fff; text-shadow: 0 1px 4px #000, 0 0 8px #000; }
.pin.done i { box-shadow: 0 0 0 2px #fff inset, 0 0 10px var(--c); }
.pin.dim { opacity: 0.25; }

/* controls */
.controls { max-width: var(--maxw); margin: 0 auto; padding: 12px var(--pad) 8px; background: var(--bg); }
.controls .row { display: flex; align-items: center; gap: 12px; }
.btn { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line); background: var(--bg3); font-size: 18px; cursor: pointer; flex: 0 0 auto; }
.btn:active { transform: scale(0.96); }
.clock { flex: 1 1 auto; font-variant-numeric: tabular-nums; font-size: 22px; font-weight: 700; }
.clock .tplus { color: var(--fg3); font-size: 14px; margin-right: 2px; }
.clock .unit { color: var(--fg3); font-size: 12px; font-weight: 400; margin-left: 8px; }
.speeds { display: flex; gap: 6px; }
.chip { border: 1px solid var(--line); background: transparent; color: var(--fg2); border-radius: 999px; padding: 4px 10px; font-size: 13px; cursor: pointer; }
.chip.active { background: var(--bg3); color: var(--fg); border-color: var(--fg3); }
.slider { width: 100%; margin: 10px 0 6px; accent-color: var(--accent); height: 28px; }
.status { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 4px 12px; font-size: 13px; color: var(--fg2); }
.status .st { display: flex; align-items: center; gap: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.status .st i { width: 8px; height: 8px; border-radius: 50%; background: var(--c); flex: 0 0 auto; }
.status .st b { color: var(--fg); font-weight: 600; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.align-note { margin: 8px 0 0; color: var(--fg3); font-size: 12px; }

/* sections */
.section { max-width: var(--maxw); margin: 0 auto; padding: 28px var(--pad); border-top: 1px solid var(--line); }
.section h2 { font-size: 24px; margin-bottom: 6px; }
.lead { color: var(--fg2); margin: 0 0 16px; }

/* cards */
.cards { display: grid; gap: 12px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .cards { grid-template-columns: repeat(3, 1fr); } }
.card { position: relative; background: var(--bg2); border: 1px solid var(--line); border-left: 4px solid var(--c); border-radius: var(--radius); padding: 14px 14px 12px; cursor: pointer; transition: transform .15s, border-color .15s, opacity .15s; }
.card:hover { transform: translateY(-2px); }
.card.active { border-color: var(--c); box-shadow: 0 0 0 1px var(--c) inset; }
.card.muted { opacity: 0.45; }
.card .who { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.card .who b { font-size: 18px; }
.card .who .from { color: var(--fg2); }
.card .who .date { margin-left: auto; color: var(--fg3); font-size: 13px; font-variant-numeric: tabular-nums; }
.card .chain { margin: 6px 0 10px; font-size: 14px; color: var(--fg2); line-height: 1.5; }
.card .chain b { color: var(--fg); font-weight: 600; }
.card .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.card .stat { background: var(--bg3); border-radius: 10px; padding: 6px 8px; text-align: center; }
.card .stat b { display: block; font-size: 17px; font-variant-numeric: tabular-nums; }
.card .stat span { font-size: 11px; color: var(--fg3); }
.card .note { margin: 10px 0 0; font-size: 13px; color: var(--fg2); }
.card .badge { display: inline-block; margin-top: 8px; font-size: 11px; color: var(--fg3); border: 1px dashed var(--line); border-radius: 6px; padding: 2px 6px; }
.card .badge.measured { border-style: solid; color: var(--fg2); }
.tag { display: inline-block; font-size: 11px; padding: 1px 6px; border-radius: 6px; background: var(--bg3); color: var(--fg3); }

/* charts */
.charts { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 900px) { .charts { grid-template-columns: repeat(3, 1fr); } }
figure { margin: 0; background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; }
figcaption { font-size: 13px; color: var(--fg2); margin-bottom: 4px; }
.chart { height: 220px; }

/* regions */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
th { color: var(--fg3); font-weight: 500; font-size: 12px; }
td.num { font-variant-numeric: tabular-nums; text-align: right; }
.access { margin: 14px 0 6px; padding-left: 18px; color: var(--fg2); font-size: 14px; }
.access li { margin: 4px 0; }

/* video */
.video-wrap { position: relative; padding-top: 56.25%; background: #000; border-radius: var(--radius); overflow: hidden; }
.video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; }

/* footer */
.footer { max-width: var(--maxw); margin: 0 auto; padding: 24px var(--pad) calc(32px + env(safe-area-inset-bottom)); border-top: 1px solid var(--line); color: var(--fg2); font-size: 14px; }
.footer p { margin: 4px 0; }
.footer details { margin: 10px 0; }
.footer summary { cursor: pointer; color: var(--fg); }
.footer ul { margin: 6px 0 0; padding-left: 18px; }
.footer li { margin: 4px 0; }