:root {
  --bg: #F3F4F2;
  --bg-alt: #E9ECE9;
  --surface: #FFFFFF;
  --ink: #16202A;
  --muted: #5A6570;
  --line: #D6DBD8;
  --seal: #B3261E;          /* cinnabar, the one accent */
  --seal-ink: #FFFFFF;
  --up: #1D6B58;            /* text for gains */
  --down: #A3271F;          /* text for falls */
  /* map: diverging (falls warm, gains cool, grey midpoint) */
  --fall-strong: #9E2A22; --fall: #D9776A; --mid: #C9CDCB; --rise: #4E9C87; --rise-strong: #1D6B58;
  /* map: sequential (risk) */
  --seq-0: #F1D9D5; --seq-1: #DD9488; --seq-2: #C0473B; --seq-3: #7E1A14;
  --land: #E3E7E4; --land-hover: #D5DBD7; --land-line: #BFC7C2; --land-muted: #EEF0EE;
  --serif: "Source Serif 4", "Iowan Old Style", Georgia, serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --zh: "Noto Serif SC", "Songti SC", "SimSun", serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0F151A; --bg-alt: #131B21; --surface: #18222A; --ink: #E6EAE8; --muted: #95A1A9; --line: #29353E;
    --seal: #E0584C; --seal-ink: #150A09; --up: #5FC2A6; --down: #F07F73;
    --fall-strong: #F0877B; --fall: #B9574D; --mid: #4A555C; --rise: #3F8C78; --rise-strong: #6CCBB0;
    --seq-0: #3A2A2A; --seq-1: #7A3A33; --seq-2: #C0504A; --seq-3: #F29A8F;
    --land: #1E2A32; --land-hover: #26343D; --land-line: #34434D; --land-muted: #172027;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0F151A; --bg-alt: #131B21; --surface: #18222A; --ink: #E6EAE8; --muted: #95A1A9; --line: #29353E;
  --seal: #E0584C; --seal-ink: #150A09; --up: #5FC2A6; --down: #F07F73;
  --fall-strong: #F0877B; --fall: #B9574D; --mid: #4A555C; --rise: #3F8C78; --rise-strong: #6CCBB0;
  --seq-0: #3A2A2A; --seq-1: #7A3A33; --seq-2: #C0504A; --seq-3: #F29A8F;
  --land: #1E2A32; --land-hover: #26343D; --land-line: #34434D; --land-muted: #172027;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 64px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); text-underline-offset: 3px; }
a:hover { text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--seal); outline-offset: 2px; border-radius: 2px; }
.zh { font-family: var(--zh); font-weight: 500; color: var(--muted); font-size: .72em; letter-spacing: .04em; }
.wrap { max-width: 1160px; margin-inline: auto; padding-inline: 24px; }
@media (max-width: 600px) { .wrap { padding-inline: 16px; } }

/* top bar */
.topbar { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.topbar-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 56px; }
.brand { font: 700 18px/1 var(--serif); text-decoration: none; display: flex; align-items: center; gap: 10px; }
.brand::before { content: ""; width: 12px; height: 12px; background: var(--seal); border-radius: 2px; transform: rotate(45deg); }
.topbar nav { display: flex; gap: 22px; font-size: 14px; }
.topbar nav a { text-decoration: none; color: var(--muted); }
.topbar nav a:hover { color: var(--ink); }
@media (max-width: 640px) { .topbar nav { gap: 14px; font-size: 13px; } .topbar nav a[href="#contact"] { display: none; } }
@media (max-width: 400px) { .topbar nav a[href="#monitor"] { display: none; } }

/* hero */
.hero { padding-block: 72px 56px; }
.eyebrow { font: 500 12px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin: 0 0 18px; }
.hero h1 { font: 600 clamp(34px, 5.2vw, 60px)/1.06 var(--serif); letter-spacing: -.015em; max-width: 17ch; margin: 0 0 22px; text-wrap: balance; }
.lede { max-width: 62ch; font-size: 18px; color: var(--muted); margin: 0; }

/* sections */
.section { padding-block: 72px; border-top: 1px solid var(--line); }
.section.alt { background: var(--bg-alt); }
.sec-head { margin-bottom: 32px; max-width: 70ch; }
.sec-head.row { max-width: none; display: flex; justify-content: space-between; align-items: end; gap: 16px; flex-wrap: wrap; }
.sec-kicker { font: 500 12px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--seal); }
.sec-head h2 { font: 600 clamp(28px, 3.6vw, 40px)/1.12 var(--serif); margin: 10px 0 12px; text-wrap: balance; letter-spacing: -.01em; }
.sec-head p { color: var(--muted); margin: 0; }

/* headline strip */
.strip { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); margin-bottom: 24px; }
.strip > div { padding: 14px 16px 14px 0; display: grid; gap: 2px; }
.strip > div + div { padding-left: 16px; border-left: 1px solid var(--line); }
.strip .k { font-size: 12px; color: var(--muted); }
.strip .v { font: 500 24px/1.2 var(--mono); font-variant-numeric: tabular-nums; }
.strip .s { font: 400 11px/1.3 var(--mono); color: var(--muted); }
@media (max-width: 760px) { .strip { grid-template-columns: repeat(2, 1fr); } .strip > div:nth-child(3) { padding-left: 0; border-left: 0; } .strip > div:nth-child(n+3) { border-top: 1px solid var(--line); } }

/* monitor layout */
.cpm { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 24px; align-items: start; }
@media (max-width: 920px) { .cpm { grid-template-columns: 1fr; } }
.cpm-controls { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; background: var(--surface); flex-wrap: wrap; }
.seg button { font: 500 13px/1 var(--sans); padding: 9px 12px; border: 0; background: transparent; color: var(--muted); cursor: pointer; }
.seg button + button { border-left: 1px solid var(--line); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
.toggle { font-size: 13px; color: var(--muted); display: inline-flex; gap: 6px; align-items: center; cursor: pointer; }
.toggle input { accent-color: var(--seal); }
.cpm-map-frame { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
#cpm-map { width: 100%; height: 520px; }
@media (max-width: 600px) { #cpm-map { height: 380px; } }
.map-caption { position: absolute; top: 12px; left: 14px; font: 500 12px/1 var(--mono); color: var(--muted); pointer-events: none; }
.map-err { padding: 40px 20px; color: var(--muted); }
.fine { font-size: 12.5px; color: var(--muted); margin: 10px 0 0; }

.cpm-panel { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 18px; display: grid; gap: 16px; }
.city-pick { display: grid; gap: 6px; }
.k { font-size: 12px; color: var(--muted); }
select { font: 400 14px var(--sans); padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); width: 100%; }
.city-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.city-head h3 { font: 600 26px/1.1 var(--serif); margin: 0; }
.tag { font: 500 11px/1 var(--mono); color: var(--muted); letter-spacing: .04em; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 16px; margin: 0; }
.stats div { display: grid; gap: 2px; }
.stats dt { font-size: 12px; color: var(--muted); }
.stats dd { margin: 0; font: 500 20px/1.2 var(--mono); font-variant-numeric: tabular-nums; display: flex; align-items: center; gap: 8px; }
[data-sign="up"] { color: var(--up); }
[data-sign="down"] { color: var(--down); }
.riskbar { flex: 1; height: 6px; background: var(--bg-alt); border-radius: 3px; overflow: hidden; max-width: 80px; }
.riskbar span { display: block; height: 100%; background: var(--seal); border-radius: 3px; transition: width .3s; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font: 500 12px/1 var(--sans); padding: 6px 8px; border-radius: 4px; border: 1px solid var(--line); display: inline-flex; gap: 6px; align-items: center; }
.chip b { font: 400 9px/1 var(--mono); letter-spacing: 1px; color: var(--down); }
.chip[data-dir="up"] b { color: var(--up); }
.chip-none { font-size: 12.5px; color: var(--muted); }

.proj { border-top: 1px solid var(--line); padding-top: 14px; }
.proj-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.proj-head span { font-size: 13px; font-weight: 600; }
.proj-head strong { font: 600 26px/1 var(--mono); font-variant-numeric: tabular-nums; }
.proj-range { font: 400 12px/1.4 var(--mono); color: var(--muted); text-align: right; margin: 4px 0 12px; }
.wf { display: grid; gap: 7px; }
.wf-row { display: grid; grid-template-columns: 104px 1fr 54px; gap: 8px; align-items: center; font-size: 12px; }
.wf-label { color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.wf-track { position: relative; height: 12px; }
.wf-zero { position: absolute; left: 50%; top: -3px; bottom: -3px; width: 1px; background: var(--line); }
.wf-bar { position: absolute; top: 2px; height: 8px; border-radius: 2px; }
.wf-bar[data-dir="up"] { background: var(--rise); }
.wf-bar[data-dir="down"] { background: var(--fall); }
.wf-val { font: 500 12px/1 var(--mono); text-align: right; font-variant-numeric: tabular-nums; }

.cpm-lower { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 24px; margin-top: 24px; }
@media (max-width: 920px) { .cpm-lower { grid-template-columns: 1fr; } }
.scenario, .analysis { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 18px; }
.sub-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 12px; }
.sub-head h3 { font: 600 18px/1.2 var(--serif); margin: 0; }
.linkbtn { font: 500 13px var(--sans); color: var(--muted); background: none; border: 0; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
#cpm-sliders { display: grid; gap: 14px; }
.sl label { display: flex; justify-content: space-between; gap: 8px; font-size: 13.5px; font-weight: 500; }
.sl output { font: 500 12px var(--mono); color: var(--muted); white-space: nowrap; }
.sl input { width: 100%; accent-color: var(--seal); margin: 6px 0 2px; }
.sl small { display: block; font-size: 12px; color: var(--muted); line-height: 1.45; }
.engine { font: 500 11px/1.2 var(--mono); color: var(--muted); text-align: right; }
.engine[data-kind="ai"] { color: var(--seal); }
.out { font-size: 14.5px; max-width: 70ch; min-height: 200px; transition: opacity .2s; }
.out[data-stale] { opacity: .5; }
.out h4 { font: 600 14px/1.3 var(--sans); margin: 16px 0 4px; }
.out h4:first-child { margin-top: 0; }
.out p { margin: 0 0 8px; }
.out ul { margin: 0 0 8px; padding-left: 18px; }
.out li { margin-bottom: 4px; }
.loading { color: var(--muted); font-style: italic; }
.btn { font: 600 14px/1 var(--sans); background: var(--seal); color: var(--seal-ink); border: 1px solid var(--seal); padding: 12px 18px; border-radius: 6px; cursor: pointer; margin-top: 12px; text-decoration: none; display: inline-block; }
.btn:disabled { opacity: .6; cursor: progress; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--ink); margin-top: 0; }
.method { margin-top: 24px; font-size: 14px; color: var(--muted); max-width: 80ch; }
.method summary { cursor: pointer; font-weight: 600; color: var(--ink); }
.method p { margin: 10px 0; }

/* memos */
.memos { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
@media (max-width: 860px) { .memos { grid-template-columns: 1fr; } }
.memo { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 24px; display: grid; gap: 18px; }
.memo-id { display: flex; justify-content: space-between; gap: 8px; font: 500 12px/1 var(--mono); }
.ticker { letter-spacing: .04em; }
.status { color: var(--seal); text-transform: uppercase; letter-spacing: .08em; font-size: 11px; }
.memo h3 { font: 600 28px/1.15 var(--serif); margin: 12px 0 10px; }
.thesis { margin: 0; font: 400 17px/1.55 var(--serif); }
.kv { display: grid; grid-template-columns: 1fr 1fr; margin: 0; border-top: 1px solid var(--line); }
.kv div { padding: 10px 0; border-bottom: 1px solid var(--line); display: grid; gap: 2px; }
.kv div:nth-child(odd) { padding-right: 12px; }
.kv div:nth-child(even) { padding-left: 12px; border-left: 1px solid var(--line); }
.kv dt { font-size: 12px; color: var(--muted); }
.kv dd { margin: 0; font: 500 16px/1.3 var(--mono); font-variant-numeric: tabular-nums; }
.kv em { font-style: normal; color: var(--up); font-size: 13px; }
.memo details summary { cursor: pointer; font-weight: 600; font-size: 14px; list-style: none; display: inline-flex; align-items: center; gap: 8px; }
.memo details summary::-webkit-details-marker { display: none; }
.memo details summary::after { content: "+"; font: 500 16px/1 var(--mono); color: var(--seal); }
.memo details[open] summary::after { content: "−"; }
.memo-body { font-size: 15px; }
.memo-body h4 { font: 600 16px/1.3 var(--serif); margin: 20px 0 6px; }
.memo-body p, .memo-body ul { margin: 0 0 10px; }
.memo-body ul { padding-left: 18px; }
.memo-body li { margin-bottom: 6px; }
.src { font-size: 12.5px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 10px; margin-top: 16px !important; }

/* cv */
.cv { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; }
@media (max-width: 860px) { .cv { grid-template-columns: 1fr; gap: 24px; } }
.cv-block h3 { font: 500 12px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin: 0 0 14px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.cv-block h3:not(:first-child) { margin-top: 28px; }
.entry { margin-bottom: 16px; }
.entry-top { display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.entry-top span { font: 400 13px var(--mono); color: var(--muted); }
.entry p { margin: 4px 0 0; color: var(--muted); font-size: 14.5px; }
.plain { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; font-size: 14.5px; }
.muted { color: var(--muted); }

/* socials */
.socials { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; max-width: 760px; }
@media (max-width: 600px) { .socials { grid-template-columns: 1fr; } }
.social { display: flex; align-items: center; gap: 16px; padding: 20px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; text-decoration: none; transition: border-color .15s, transform .15s; }
.social:hover { border-color: var(--ink); transform: translateY(-1px); }
@media (prefers-reduced-motion: reduce) { .social { transition: none; } .social:hover { transform: none; } }
.social svg { width: 28px; height: 28px; flex: none; color: var(--seal); }
.social span { display: grid; gap: 2px; }
.social strong { font: 600 18px/1.2 var(--serif); }
.social small { color: var(--muted); font-size: 13px; }

.foot { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-block: 28px; font-size: 13px; color: var(--muted); border-top: 1px solid var(--line); }