:root {
  color-scheme: dark;
  --bg: #07101d;
  --surface: rgba(16, 30, 49, 0.72);
  --surface-strong: #101d30;
  --line: rgba(169, 196, 226, 0.14);
  --text: #f4f7fb;
  --muted: #8fa3bb;
  --cyan: #52e3c2;
  --cyan-soft: rgba(82, 227, 194, 0.14);
  --gold: #f2bb64;
  --red: #ff6b68;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 76% 12%, rgba(27, 95, 115, 0.2), transparent 28rem),
    linear-gradient(180deg, #081321 0%, var(--bg) 65%, #050b14 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
.ambient { position: fixed; z-index: -1; filter: blur(80px); opacity: .2; border-radius: 50%; }
.ambient-one { width: 24rem; height: 24rem; background: #1bc6a0; top: 12rem; right: -12rem; }
.ambient-two { width: 20rem; height: 20rem; background: #b56d2b; bottom: 8rem; left: -12rem; }

.site-header {
  width: min(calc(100% - 40px), var(--max));
  height: 84px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; gap: 12px; align-items: center; }
.brand-mark {
  width: 42px; height: 42px; border: 1px solid rgba(242,187,100,.65); border-radius: 50%;
  display: grid; place-items: center; color: var(--gold); font-family: serif; font-size: 23px;
  box-shadow: inset 0 0 0 4px rgba(242,187,100,.07);
}
.brand strong { display: block; font-size: 19px; letter-spacing: .04em; }
.brand small { display: block; color: var(--muted); font-size: 11px; letter-spacing: .12em; }
nav { display: flex; align-items: center; gap: 28px; font-size: 13px; color: #b7c4d4; }
nav a:hover { color: var(--text); }
.nav-github { border: 1px solid var(--line); border-radius: 999px; padding: 8px 14px; }

main, footer { width: min(calc(100% - 40px), var(--max)); margin: auto; }
.hero { min-height: 660px; padding: 90px 0 80px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: center; }
.eyebrow, .kicker { color: var(--cyan); font-size: 11px; font-weight: 700; letter-spacing: .18em; }
.pulse-dot { display: inline-block; width: 7px; height: 7px; margin-right: 10px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 18px var(--cyan); animation: pulse 2s infinite; }
@keyframes pulse { 50% { opacity: .35; transform: scale(.75); } }
h1 { margin: 20px 0 24px; font-size: clamp(44px, 6vw, 78px); line-height: 1.08; letter-spacing: -.055em; }
h1 em { color: var(--gold); font-style: normal; font-family: "STKaiti", "KaiTi", serif; font-weight: 500; }
.hero-copy > p { max-width: 610px; color: #aab9ca; font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 0 22px; border-radius: 8px; font-size: 14px; font-weight: 650; }
.button.primary { color: #041713; background: var(--cyan); box-shadow: 0 8px 28px rgba(82,227,194,.18); }
.button.secondary { border: 1px solid var(--line); background: rgba(255,255,255,.025); }
.button.disabled { cursor: default; color: #7f93a8; background: #142235; box-shadow: none; }
.shortcut-note { font-size: 12px !important; color: #73879d !important; }

.position-card { border: 1px solid var(--line); border-radius: 18px; padding: 18px; background: linear-gradient(145deg, rgba(20,38,60,.92), rgba(7,17,30,.88)); box-shadow: 0 32px 80px rgba(0,0,0,.28); transform: none; user-select: none; }
.card-top, .panel-title { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: 10px; letter-spacing: .16em; }
.live-pill { color: var(--cyan); border: 1px solid rgba(82,227,194,.25); background: var(--cyan-soft); border-radius: 999px; padding: 4px 9px; }
.board { display: block; width: min(100%, 380px); margin: 18px auto 12px; filter: drop-shadow(0 18px 28px rgba(0,0,0,.28)); touch-action: manipulation; }
.board-surface { fill: url(#board-surface); stroke: rgba(242,187,100,.5); stroke-width: 2; }
.board-lines, .board-star { fill: none; stroke: rgba(48,29,15,.72); stroke-width: 3; stroke-linecap: square; stroke-linejoin: miter; }
.board-stars { opacity: .88; }
.river-label text { fill: rgba(50,27,12,.82); font-family: "STKaiti", "KaiTi", serif; font-size: 42px; text-anchor: middle; dominant-baseline: middle; letter-spacing: 8px; }
.piece { filter: drop-shadow(0 9px 7px rgba(0,0,0,.34)); }
.piece circle:first-child { fill: #ead8ad; stroke: currentColor; stroke-width: 5; }
.piece circle:nth-child(2) { fill: none; stroke: currentColor; stroke-width: 2; }
.piece text { fill: currentColor; font-family: "STKaiti", "KaiTi", serif; font-size: 49px; font-weight: 700; text-anchor: middle; dominant-baseline: central; }
.piece.black { color: #172434; }.piece.red { color: #a92e2b; }
.board-last-move { fill: rgba(242,187,100,.2); stroke: rgba(242,187,100,.72); stroke-width: 4; }
.board-selection { fill: rgba(82,227,194,.18); stroke: var(--cyan); stroke-width: 5; }
.board-target { fill: rgba(11,83,66,.82); stroke: rgba(225,255,246,.95); stroke-width: 3; filter: drop-shadow(0 2px 3px rgba(0,0,0,.35)); }
.board-target.capture { fill: none; stroke: var(--cyan); stroke-width: 7; stroke-dasharray: 12 8; }
.board-hit { fill: transparent; cursor: pointer; outline: none; }
.board-hit:focus-visible { fill: rgba(82,227,194,.12); stroke: var(--cyan); stroke-width: 4; }
.board-feedback { min-height: 46px; display: flex; align-items: start; justify-content: space-between; gap: 18px; padding: 0 3px 12px; }
.board-feedback strong, .board-feedback span { display: block; }
.board-feedback strong { color: #e3ebf4; font-size: 12px; }
.board-feedback span { max-width: 220px; color: var(--muted); font-size: 10px; text-align: right; }
.position-actions { display: grid; grid-template-columns: repeat(4, auto); gap: 7px; margin-bottom: 9px; }
.position-action { min-height: 35px; display: inline-flex; align-items: center; justify-content: center; padding: 5px 9px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.025); color: #c4d0dd; font: inherit; font-size: 10px; cursor: pointer; }
.position-action:hover, .position-action:focus-visible { color: var(--cyan); border-color: rgba(82,227,194,.42); outline: none; }
.position-action.primary { color: #061713; border-color: transparent; background: var(--cyan); font-weight: 700; }
.position-action:disabled { cursor: default; opacity: .38; }
.fen-preview { padding: 13px 14px; border-radius: 10px; background: rgba(3,9,17,.65); }
.fen-preview small { display: block; color: var(--cyan); font-size: 9px; letter-spacing: .18em; }
.fen-preview code { display: block; margin-top: 5px; color: #d7e1ed; font-size: 11px; word-break: break-all; }

.live-section, .story-section, .roadmap-section { padding: 95px 0; border-top: 1px solid var(--line); }
.section-heading { display: flex; justify-content: space-between; gap: 40px; align-items: end; margin-bottom: 35px; }
.section-heading.narrow { align-items: start; }
.section-heading h2 { margin: 8px 0 0; font-size: clamp(30px, 4vw, 46px); letter-spacing: -.035em; }
.section-heading > p { max-width: 470px; color: var(--muted); margin: 0; }
.metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.metric, .panel, .manifesto, .road-card { border: 1px solid var(--line); background: var(--surface); backdrop-filter: blur(16px); }
.metric { padding: 20px; border-radius: 12px; }
.metric span, .metric small { display: block; color: var(--muted); font-size: 11px; }
.metric strong { display: block; margin: 7px 0 3px; font-size: 30px; letter-spacing: -.04em; }
.dashboard-grid { display: grid; grid-template-columns: 1.6fr .75fr; gap: 12px; margin-top: 12px; }
.panel { border-radius: 14px; padding: 22px; }
.panel-title h3 { margin: 2px 0 0; color: var(--text); font-size: 17px; letter-spacing: normal; }
.panel-title p { margin: 0; letter-spacing: normal; }
.activity-chart { height: 180px; display: flex; align-items: end; gap: 3px; margin-top: 28px; border-bottom: 1px solid var(--line); }
.bar { flex: 1; min-width: 2px; height: var(--height); min-height: 2px; border-radius: 3px 3px 0 0; background: linear-gradient(180deg, var(--cyan), rgba(82,227,194,.22)); opacity: .82; transition: height .45s ease; }
.bar:hover { opacity: 1; }
.chart-axis { display: flex; justify-content: space-between; margin-top: 8px; color: #60758d; font-size: 10px; }
.donut-wrap { min-height: 210px; display: grid; place-items: center; grid-template-columns: 1fr; }
.donut { --rate: 0deg; width: 112px; height: 112px; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--cyan) var(--rate), #2a3546 0); position: relative; }
.donut::after { content: ""; position: absolute; inset: 12px; border-radius: 50%; background: var(--surface-strong); }
.donut span { z-index: 1; font-weight: 750; font-size: 19px; }
.quality-legend { width: 100%; }
.quality-legend p { display: grid; grid-template-columns: 12px 1fr auto; gap: 8px; align-items: center; margin: 7px 0; color: var(--muted); font-size: 12px; }
.quality-legend i { width: 7px; height: 7px; border-radius: 50%; }.accepted-dot { background: var(--cyan); }.review-dot { background: #59677a; }
.quality-legend strong { color: var(--text); }
.feed-panel { margin-top: 12px; }
.feed-head, .feed-row { display: grid; grid-template-columns: 100px 80px 80px minmax(100px,1fr) 88px 52px 72px 168px; gap: 10px; align-items: center; }
.feed-head { margin-top: 22px; padding: 8px 12px; color: #657990; font-size: 10px; letter-spacing: .12em; }
.feed-row { padding: 12px; border-top: 1px solid var(--line); font-size: 12px; }
.feed-row time, .feed-row .confidence, .feed-row .duration, .event-location { color: var(--muted); }
.event-location { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.event-recommendation { color: var(--cyan); font-weight: 600; white-space: nowrap; }
.feed-row code { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: #cdd9e6; }
.feed-actions { display: flex; gap: 6px; justify-content: flex-end; }
.feed-action { min-height: 30px; padding: 4px 9px; border: 1px solid var(--line); border-radius: 7px; background: rgba(255,255,255,.025); color: #bdcad8; font: inherit; font-size: 10px; white-space: nowrap; cursor: pointer; }
.feed-action:hover, .feed-action:focus-visible { color: var(--cyan); border-color: rgba(82,227,194,.4); outline: none; }
.status-badge { justify-self: start; border-radius: 999px; padding: 3px 9px; font-size: 10px; }
.status-accepted { color: var(--cyan); background: var(--cyan-soft); }.status-review_required { color: var(--gold); background: rgba(242,187,100,.12); }
.empty-state { padding: 40px 12px 20px; color: var(--muted); text-align: center; }
.feed-pager { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 18px 12px 2px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; }
.feed-pager > div { display: flex; gap: 8px; }
.feed-pager button { min-height: 34px; padding: 6px 12px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.025); color: var(--text); font: inherit; cursor: pointer; }
.feed-pager button:hover, .feed-pager button:focus-visible { color: var(--cyan); border-color: rgba(82,227,194,.4); outline: none; }
.feed-pager button:disabled { cursor: default; opacity: .5; }

.story-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 12px; }
.manifesto { border-radius: 14px; padding: 36px; }
.manifesto blockquote { margin: 0 0 28px; color: var(--gold); font-family: "STKaiti", "KaiTi", serif; font-size: 32px; line-height: 1.35; }
.manifesto p { color: var(--muted); }
.timeline { list-style: none; margin: 0; padding: 8px 0 8px 36px; border-left: 1px solid var(--line); }
.timeline li { display: grid; grid-template-columns: 72px 1fr; gap: 20px; position: relative; padding: 10px 0 24px; }
.timeline li::before { content: ""; position: absolute; left: -41px; top: 18px; width: 8px; height: 8px; border: 2px solid var(--cyan); border-radius: 50%; background: var(--bg); }
.timeline time { color: var(--cyan); font-family: ui-monospace, monospace; }.timeline strong, .timeline span { display: block; }.timeline span { color: var(--muted); font-size: 13px; }
.roadmap-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; }
.road-card { border-radius: 14px; padding: 26px; min-height: 250px; display: flex; flex-direction: column; }
.road-card > span { color: var(--cyan); font-size: 10px; letter-spacing: .16em; }.road-card h3 { font-size: 23px; margin: 18px 0 8px; }.road-card p { color: var(--muted); }.road-card b { margin-top: auto; color: #7489a0; font-size: 11px; }.road-card.active { border-color: rgba(82,227,194,.32); background: linear-gradient(145deg, rgba(33,81,78,.42), var(--surface)); }.road-card.active b { color: var(--cyan); }
.privacy-strip { margin: 20px 0 90px; padding: 26px 30px; border: 1px solid rgba(242,187,100,.2); border-radius: 14px; background: rgba(90,61,27,.12); display: flex; align-items: center; justify-content: space-between; gap: 30px; }.privacy-strip span, .privacy-strip strong { display: block; }.privacy-strip span { color: var(--gold); font-size: 10px; letter-spacing: .15em; }.privacy-strip p { max-width: 780px; margin: 0; color: #a8b5c4; font-size: 13px; }
footer { min-height: 110px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 24px; color: var(--muted); font-size: 12px; }footer > div { display: flex; flex-wrap: wrap; gap: 18px; }footer strong { color: var(--text); }

.docs-main { padding-bottom: 80px; }
.docs-hero { max-width: 900px; padding: 90px 0 60px; }
.docs-hero h1 { font-size: clamp(42px, 6vw, 68px); }
.docs-hero > p { max-width: 760px; color: var(--muted); font-size: 17px; }
.docs-main code { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
.docs-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 12px; }
.docs-grid .panel { min-width: 0; }
.trial-panel > p, .endpoint-panel > p, .docs-note { color: var(--muted); font-size: 13px; }
.trial-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 14px; }
.trial-actions button:disabled { opacity: .55; cursor: default; }
.trial-key { display: block; min-height: 54px; padding: 15px; border: 1px solid var(--line); border-radius: 9px; background: rgba(3,9,17,.65); color: var(--cyan); font: 12px/1.6 "SFMono-Regular", Consolas, monospace; overflow-wrap: anywhere; }
.endpoint-panel h2, .response-section h2 { margin: 12px 0 20px; font-size: 23px; }
.method { color: var(--cyan); font-size: 11px; letter-spacing: .12em; }
.parameter-list { margin: 0; }
.parameter-list > div { padding: 12px 0; border-top: 1px solid var(--line); }
.parameter-list dt { color: var(--text); font: 12px "SFMono-Regular", Consolas, monospace; }
.parameter-list dd { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.code-section { padding: 90px 0; }
.code-card { margin-top: 12px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: #050c16; }
.code-card > div { display: flex; justify-content: space-between; align-items: center; padding: 10px 15px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 11px; }
.code-copy { border: 0; background: transparent; color: var(--cyan); font: inherit; cursor: pointer; }
pre { margin: 0; padding: 20px; overflow: auto; color: #cbd8e6; font-size: 12px; line-height: 1.7; }
.response-section { align-items: stretch; }
.docs-list { margin: 0; padding-left: 20px; color: var(--muted); font-size: 13px; }
.docs-list li { margin: 10px 0; }
.docs-list code, .docs-list strong { color: var(--text); }

@media (max-width: 900px) {
  nav a:not(.nav-github) { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 65px; }
  .position-card { max-width: 560px; width: 100%; margin: auto; transform: none; }
  .metrics-grid { grid-template-columns: repeat(2,1fr); }
  .dashboard-grid, .story-grid { grid-template-columns: 1fr; }
  .docs-grid { grid-template-columns: 1fr; }
  .roadmap-grid { grid-template-columns: 1fr; }
  .feed-head { display: none; }
  .feed-row { grid-template-columns: minmax(0,1fr) auto; gap: 7px 12px; }
  .feed-row .event-location { grid-row: 2; grid-column: 1; }
  .feed-row .event-recommendation { grid-row: 2; grid-column: 2; text-align: right; }
  .feed-row .event-recommendation::before { content: "推荐："; color: var(--muted); font-weight: 400; }
  .feed-row code { grid-column: 1 / -1; grid-row: 3; }
  .feed-row .confidence, .feed-row .duration { display: none; }
  .feed-actions { grid-column: 1 / -1; justify-content: flex-start; }
}
@media (max-width: 620px) {
  .site-header, main, footer { width: min(calc(100% - 24px), var(--max)); }
  .hero { gap: 42px; min-height: auto; }.hero-actions .button { width: 100%; }
  .section-heading { display: block; }.section-heading > p { margin-top: 14px; }
  .metrics-grid { grid-template-columns: 1fr 1fr; }.metric { padding: 16px; }.metric strong { font-size: 24px; }
  .feed-action { min-height: 34px; }.feed-pager { align-items: flex-start; flex-direction: column; }.feed-pager > div { width: 100%; }.feed-pager button { flex: 1; }
  .story-grid .manifesto { padding: 24px; }.manifesto blockquote { font-size: 27px; }
  .privacy-strip, footer { flex-direction: column; align-items: flex-start; }.privacy-strip { padding: 22px; }footer { padding: 25px 0; }footer > div { flex-wrap: wrap; }
  .docs-hero { padding-top: 65px; }.trial-actions .button { width: 100%; }
  .board-feedback { display: block; }.board-feedback span { max-width: none; margin-top: 3px; text-align: left; }.position-actions { grid-template-columns: 1fr 1fr; }.position-action { min-height: 39px; }
}