:root {
  color-scheme: light;
  font-family: var(--font-ui);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --canvas: oklch(97.2% 0.006 255);
  --surface: oklch(99.4% 0.003 255);
  --surface-subtle: oklch(94.8% 0.008 255);
  --line: oklch(88.2% 0.012 255);
  --line-strong: oklch(76.5% 0.018 255);
  --text: oklch(20% 0.018 255);
  --text-soft: oklch(40% 0.02 255);
  --text-muted: oklch(52% 0.018 255);
  --blue: oklch(54% 0.2 255);
  --blue-hover: oklch(47% 0.19 255);
  --blue-soft: oklch(93.5% 0.035 255);
  --green: oklch(52% 0.13 155);
  --brand: oklch(22% 0.022 255);
  --on-brand: oklch(98% 0.004 255);
  --font-ui: "Segoe UI Variable Text", "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif;
  --font-display: Bahnschrift, "Segoe UI Variable Display", "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif;
  --font-mono: "Cascadia Mono", "Cascadia Code", Consolas, monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --canvas: oklch(15.5% 0.014 255);
  --surface: oklch(19% 0.016 255);
  --surface-subtle: oklch(23.5% 0.018 255);
  --line: oklch(29% 0.022 255);
  --line-strong: oklch(39% 0.025 255);
  --text: oklch(94% 0.008 255);
  --text-soft: oklch(78% 0.018 255);
  --text-muted: oklch(65% 0.02 255);
  --blue: oklch(72% 0.14 255);
  --blue-hover: oklch(78% 0.11 255);
  --blue-soft: oklch(28% 0.055 255);
  --green: oklch(72% 0.12 155);
  --brand: oklch(91% 0.012 255);
  --on-brand: oklch(17% 0.015 255);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--canvas); }
body { min-width: 320px; margin: 0; background: var(--canvas); color: var(--text); }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; font: inherit; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }
svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.site-header {
  width: min(1480px, calc(100% - 64px));
  min-height: 82px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 32px;
  border-bottom: 1px solid var(--line);
}
.site-brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 42px; height: 42px; flex: none; border-radius: 10px; object-fit: cover; }
.site-brand > span:last-child { display: grid; line-height: 1.1; }
.site-brand strong { font-size: 1rem; }
.site-brand small { margin-top: 5px; color: var(--text-muted); font-size: .6875rem; }
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 26px; }
.site-nav a { color: var(--text-soft); font-size: .8125rem; text-decoration: none; }
.site-nav a:hover { color: var(--text); }
.site-theme-toggle { min-width: 76px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 7px; padding: 0 12px; border: 1px solid var(--line-strong); border-radius: 9px; background: transparent; color: var(--text-soft); font-size: .75rem; cursor: pointer; }
.site-theme-toggle:hover { border-color: var(--text-muted); color: var(--text); }
.sun-icon, [data-theme="dark"] .moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: block; }

main { overflow: hidden; }
.hero {
  width: min(1120px, calc(100% - 48px));
  min-height: min(790px, calc(100svh - 82px));
  margin: 0 auto;
  padding: clamp(92px, 12vw, 164px) 0 110px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.eyebrow, .section-index { margin: 0; color: var(--blue); font-family: var(--font-mono); font-size: .75rem; font-weight: 650; letter-spacing: .08em; text-transform: uppercase; }
.hero h1 { margin: 28px 0 0; font-family: var(--font-display); font-size: clamp(3.25rem, 7.6vw, 6.75rem); font-weight: 720; line-height: .98; letter-spacing: -.055em; text-wrap: balance; }
.hero h1 span { color: var(--text-soft); }
.hero-intro { max-width: 45rem; margin: 34px auto 0; color: var(--text-soft); font-size: 1.0625rem; line-height: 1.8; text-wrap: pretty; }
.download-label { margin: 34px 0 0; color: var(--text-muted); font-family: var(--font-mono); font-size: .6875rem; font-weight: 650; letter-spacing: .08em; text-transform: uppercase; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 10px; }
.button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; padding: 0 19px; border: 1px solid var(--line-strong); border-radius: 10px; font-size: .875rem; font-weight: 680; text-decoration: none; transition: border-color 120ms ease, background-color 120ms ease, color 120ms ease; }
.button svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.button.primary { border-color: var(--brand); background: var(--brand); color: var(--on-brand); }
.button.primary:hover { border-color: var(--blue); background: var(--blue); color: oklch(98% 0.004 255); }
.button.secondary { background: transparent; color: var(--text); }
.button.secondary:hover { border-color: var(--text-muted); }
.button.source { border-color: transparent; background: transparent; color: var(--text-soft); }
.button.source:hover { color: var(--text); }
.release-note { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px 12px; margin: 19px 0 0; color: var(--text-muted); font-size: .75rem; }
.release-note span:last-child::before { content: "·"; margin-right: 12px; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }

.app-showcase, .features, .boundary, .download-close {
  width: min(1480px, calc(100% - 64px));
  margin: 0 auto;
  border-top: 1px solid var(--line);
}
.app-showcase { padding: clamp(86px, 10vw, 138px) 0; }
.showcase-heading { display: grid; grid-template-columns: minmax(320px, .85fr) minmax(360px, 1fr); gap: clamp(40px, 9vw, 140px); align-items: end; }
.showcase-heading h2, .boundary h2, .download-close h2 { max-width: 12ch; margin: 20px 0 0; font-family: var(--font-display); font-size: clamp(2.5rem, 5vw, 5.25rem); font-weight: 700; line-height: 1.02; letter-spacing: -.045em; }
.showcase-heading > p, .boundary-copy > p { max-width: 38rem; margin: 0; color: var(--text-soft); font-size: 1rem; line-height: 1.8; }

.console-stage { margin-top: clamp(54px, 7vw, 92px); }
.stage-toolbar { min-height: 52px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 0 4px 0 16px; color: var(--text-muted); font-size: .75rem; }
.stage-toolbar > span { display: inline-flex; align-items: center; gap: 9px; }
.stage-toolbar > span i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }
.stage-theme-switch { display: grid; grid-template-columns: 1fr 1fr; padding: 3px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface-subtle); }
.stage-theme-switch button { min-height: 32px; padding: 0 14px; border: 0; border-radius: 6px; background: transparent; color: var(--text-soft); font-size: .6875rem; cursor: pointer; }
.stage-theme-switch button[aria-pressed="true"] { background: var(--surface); color: var(--text); font-weight: 680; }

.console-window {
  --c-canvas: oklch(94.5% 0.008 255);
  --c-surface: oklch(99.5% 0.002 255);
  --c-subtle: oklch(96.5% 0.006 255);
  --c-control: oklch(98.5% 0.003 255);
  --c-line: oklch(87% 0.012 255);
  --c-line-strong: oklch(77% 0.018 255);
  --c-text: oklch(19% 0.018 255);
  --c-soft: oklch(40% 0.022 255);
  --c-muted: oklch(53% 0.018 255);
  --c-blue: oklch(55% 0.2 255);
  --c-blue-soft: oklch(94% 0.035 255);
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: clamp(16px, 2vw, 26px);
  background: var(--c-canvas);
  color: var(--c-text);
  font-family: var(--font-ui);
}
.console-window[data-preview="dark"] {
  --c-canvas: oklch(15.5% 0.014 255);
  --c-surface: oklch(19.5% 0.016 255);
  --c-subtle: oklch(23.5% 0.018 255);
  --c-control: oklch(21% 0.016 255);
  --c-line: oklch(30% 0.022 255);
  --c-line-strong: oklch(40% 0.026 255);
  --c-text: oklch(94% 0.008 255);
  --c-soft: oklch(77% 0.018 255);
  --c-muted: oklch(64% 0.02 255);
  --c-blue: oklch(72% 0.14 255);
  --c-blue-soft: oklch(28% 0.055 255);
}
.console-header { min-height: 74px; display: grid; grid-template-columns: auto auto minmax(210px, 1fr) auto auto; align-items: center; gap: 14px; padding: 0 22px; border-bottom: 1px solid var(--c-line); background: var(--c-surface); }
.console-brand { width: 38px; height: 38px; border-radius: 8px; object-fit: cover; }
.console-title, .console-runtime, .console-resolution { display: grid; }
.console-title strong { font-size: .875rem; }
.console-title small, .console-runtime small, .console-resolution small { margin-top: 3px; color: var(--c-muted); font-size: .625rem; }
.console-runtime { position: relative; grid-template-columns: auto 1fr; align-items: center; gap: 9px; margin-left: 18px; padding-left: 22px; border-left: 1px solid var(--c-line); }
.console-runtime > i { width: 8px; height: 8px; border-radius: 50%; background: var(--c-muted); }
.console-runtime span { display: grid; }
.console-runtime strong, .console-resolution strong { font-size: .6875rem; }
.console-resolution { text-align: right; font-variant-numeric: tabular-nums; }
.console-actions { display: flex; align-items: center; gap: 7px; }
.console-actions > span { min-height: 34px; display: inline-flex; align-items: center; padding: 0 10px; border: 1px solid var(--c-line-strong); border-radius: 7px; color: var(--c-soft); font-size: .625rem; }
.console-actions > b { min-height: 36px; display: inline-flex; align-items: center; gap: 7px; padding: 0 11px; border-radius: 7px; background: var(--c-blue); color: oklch(98% 0.004 255); font-size: .6875rem; }
kbd { padding: 2px 4px; border: 1px solid currentColor; border-radius: 3px; font-family: var(--font-mono); font-size: .5625rem; font-weight: 500; }
.console-body { padding: clamp(16px, 2vw, 24px); }
.console-phase { padding: 20px 22px 17px; border: 1px solid var(--c-line); border-radius: 12px; background: var(--c-surface); }
.console-phase > span { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.console-phase > span strong { font-size: .8125rem; }
.console-phase > span small { color: var(--c-muted); font-size: .625rem; }
.console-phase > span b { margin-left: 8px; color: var(--c-text); font-family: var(--font-mono); font-size: .625rem; }
.console-phase ol { display: grid; grid-template-columns: repeat(7, 1fr); margin: 18px 0 0; padding: 0; list-style: none; }
.console-phase li { position: relative; min-width: 0; display: grid; justify-items: center; gap: 6px; color: var(--c-muted); font-size: .625rem; text-align: center; }
.console-phase li::before { content: ""; position: absolute; top: 10px; right: 50%; left: -50%; height: 1px; background: var(--c-line-strong); }
.console-phase li:first-child::before { display: none; }
.console-phase li i { position: relative; z-index: 1; width: 22px; height: 22px; display: grid; place-items: center; border: 1px solid var(--c-line-strong); border-radius: 50%; background: var(--c-surface); font-family: var(--font-mono); font-size: .5625rem; font-style: normal; }
.console-phase li.active { color: var(--c-text); font-weight: 680; }
.console-phase li.active i { border: 2px solid var(--c-blue); background: var(--c-blue-soft); color: var(--c-blue); }
.console-columns { display: grid; grid-template-columns: .94fr 1.08fr .98fr; gap: 14px; margin-top: 14px; align-items: start; }
.console-panel { min-width: 0; padding: 18px; border: 1px solid var(--c-line); border-radius: 12px; background: var(--c-surface); }
.panel-heading { display: flex; gap: 11px; padding-bottom: 15px; border-bottom: 1px solid var(--c-line); }
.panel-heading > span { width: 30px; height: 30px; flex: none; display: grid; place-items: center; border-radius: 7px; background: var(--c-blue-soft); color: var(--c-blue); font-family: var(--font-mono); font-size: .5625rem; }
.panel-heading h3 { margin: 0; font-size: .75rem; }
.panel-heading p { margin: 4px 0 0; color: var(--c-soft); font-size: .5625rem; line-height: 1.5; }
.segmented { display: grid; grid-template-columns: 1fr 1fr; margin-top: 14px; padding: 2px; border: 1px solid var(--c-line); border-radius: 7px; background: var(--c-subtle); text-align: center; font-size: .5625rem; }
.segmented b, .segmented span { padding: 7px; border-radius: 5px; }
.segmented b { background: var(--c-surface); }
.segmented span { color: var(--c-soft); }
.resolution-card { display: grid; gap: 3px; margin-top: 10px; padding: 11px; border: 1px solid color-mix(in oklch, var(--c-blue) 32%, var(--c-line)); border-radius: 7px; background: var(--c-blue-soft); }
.resolution-card small { color: var(--c-soft); font-size: .5625rem; }
.resolution-card strong { color: var(--c-blue); font-size: .9375rem; font-variant-numeric: tabular-nums; }
.console-panel h4 { display: flex; justify-content: space-between; gap: 10px; margin: 14px 0 8px; font-size: .625rem; }
.console-panel h4 small { color: var(--c-muted); font-weight: 500; }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.field-grid.settings-fields { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.field-grid label { display: grid; gap: 5px; color: var(--c-soft); font-size: .5625rem; }
.field-grid label b, .field-grid label em { min-height: 31px; display: flex; align-items: center; padding: 0 9px; border: 1px solid var(--c-line-strong); border-radius: 6px; background: var(--c-control); color: var(--c-text); font-size: .625rem; font-style: normal; font-weight: 500; font-variant-numeric: tabular-nums; }
.scale-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-top: 10px; overflow: hidden; border: 1px solid var(--c-line); border-radius: 7px; background: var(--c-line); }
.scale-row.settings-scales { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.scale-row span { display: grid; gap: 4px; padding: 10px; background: var(--c-subtle); color: var(--c-soft); font-size: .53125rem; }
.scale-row strong { color: var(--c-blue); font-size: .75rem; }
.vector-card { position: relative; min-height: 82px; margin-top: 14px; padding: 11px; overflow: hidden; border: 1px solid var(--c-line); border-radius: 7px; background: var(--c-subtle); font-size: .5625rem; }
.vector-card span { color: var(--c-soft); }
.vector-card b { float: right; font-family: var(--font-mono); font-size: .5625rem; }
.vector-card::before, .vector-card::after { content: ""; position: absolute; background: var(--c-line-strong); }
.vector-card::before { top: 54px; right: 22%; left: 22%; height: 1px; }
.vector-card::after { top: 31px; bottom: 7px; left: 50%; width: 1px; }
.vector-card i { position: absolute; z-index: 1; top: 49px; left: 39%; width: 10px; height: 10px; border: 2px solid var(--c-surface); border-radius: 50%; background: var(--c-blue); }
.offset-card { position: relative; margin-top: 10px; padding: 11px; border: 1px solid var(--c-line); border-radius: 7px; }
.offset-card.selected { border-color: color-mix(in oklch, var(--c-blue) 50%, var(--c-line)); background: color-mix(in oklch, var(--c-blue-soft) 55%, var(--c-surface)); }
.offset-card > span { display: grid; padding-right: 70px; }
.offset-card > span strong { font-size: .625rem; }
.offset-card > span small { margin-top: 3px; color: var(--c-soft); font-size: .53125rem; }
.offset-card > b { position: absolute; top: 11px; right: 11px; padding: 3px 5px; border-radius: 4px; background: var(--c-subtle); color: var(--c-blue); font-family: var(--font-mono); font-size: .5rem; }
.offset-card .field-grid { margin-top: 9px; }
.timing-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 8px; margin-top: 14px; }
.timing-grid label { display: grid; gap: 4px; color: var(--c-soft); font-size: .5625rem; }
.timing-grid b { min-height: 31px; display: flex; align-items: center; justify-content: space-between; padding: 0 9px; border: 1px solid var(--c-line-strong); border-radius: 6px; background: var(--c-control); color: var(--c-text); font-size: .625rem; font-weight: 500; font-variant-numeric: tabular-nums; }
.timing-grid b small, .timing-grid label > span { color: var(--c-muted); font-size: .5rem; font-weight: 400; line-height: 1.35; }
.safety-card { display: flex; align-items: flex-start; gap: 10px; margin-top: 14px; padding: 11px; border: 1px solid color-mix(in oklch, var(--c-blue) 32%, var(--c-line)); border-radius: 7px; background: var(--c-blue-soft); }
.safety-card > i { width: 8px; height: 8px; margin-top: 3px; flex: none; border-radius: 2px; background: var(--c-blue); }
.safety-card > span { display: grid; gap: 3px; }
.safety-card strong { font-size: .625rem; }
.safety-card small { color: var(--c-soft); font-size: .53125rem; line-height: 1.45; }
.console-footer { min-height: 44px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 0 24px; border-top: 1px solid var(--c-line); background: var(--c-surface); color: var(--c-muted); font-size: .5625rem; }
.console-footer strong { display: flex; align-items: center; gap: 6px; color: var(--c-soft); font-weight: 500; }
.console-footer strong i { width: 6px; height: 6px; border-radius: 50%; background: var(--green); }

.features { padding: clamp(86px, 10vw, 138px) 0; }
.feature-list { margin-top: clamp(54px, 7vw, 88px); border-top: 1px solid var(--line-strong); }
.feature-list article { min-height: 150px; display: grid; grid-template-columns: 80px minmax(170px, .55fr) minmax(300px, 1fr); align-items: center; gap: 28px; border-bottom: 1px solid var(--line); }
.feature-list article > span { color: var(--blue); font-family: var(--font-mono); font-size: .75rem; }
.feature-list h3 { margin: 0; font-family: var(--font-display); font-size: clamp(1.5rem, 2.3vw, 2.25rem); letter-spacing: -.025em; }
.feature-list p { max-width: 42rem; margin: 0; color: var(--text-soft); font-size: .9375rem; line-height: 1.75; }

.boundary { display: grid; grid-template-columns: minmax(320px, .85fr) minmax(360px, 1fr); gap: clamp(40px, 9vw, 140px); padding: clamp(86px, 10vw, 138px) 0; }
.boundary-copy ul { margin: 38px 0 0; padding: 0; border-top: 1px solid var(--line-strong); list-style: none; }
.boundary-copy li { min-height: 56px; display: flex; align-items: center; gap: 11px; border-bottom: 1px solid var(--line); color: var(--text-soft); font-size: .875rem; }
.boundary-copy li::before { content: ""; width: 6px; height: 6px; border: 1px solid var(--blue); border-radius: 2px; }

.download-close { min-height: 520px; padding: 100px 0; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.download-close h2 { max-width: none; margin-top: 28px; }
.download-close .hero-actions { margin-top: 42px; }
.site-footer { width: min(1480px, calc(100% - 64px)); min-height: 92px; margin: 0 auto; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 28px; border-top: 1px solid var(--line); color: var(--text-muted); font-size: .6875rem; }
.site-footer span:nth-child(2) { justify-self: center; text-align: center; }

@media (max-width: 1100px) {
  .site-nav { display: none; }
  .site-theme-toggle { margin-left: auto; }
  .console-window { overflow-x: auto; }
  .console-header, .console-body, .console-footer { min-width: 980px; }
  .console-stage { overflow: hidden; border-radius: 26px; }
}

@media (max-width: 760px) {
  .site-header, .app-showcase, .features, .boundary, .download-close, .site-footer { width: min(100% - 28px, 1480px); }
  .site-header { min-height: 72px; }
  .site-brand small { display: none; }
  .site-theme-toggle { min-width: 44px; width: 44px; padding: 0; }
  .site-theme-toggle span { display: none; }
  .hero { width: min(100% - 28px, 1120px); min-height: auto; padding: 86px 0 82px; }
  .hero h1 { max-width: 100%; margin-top: 22px; font-size: clamp(2.75rem, 10vw, 3.5rem); overflow-wrap: anywhere; word-break: break-all; }
  .hero h1 span { display: inline-block; max-width: 100%; }
  .hero-intro { width: 100%; margin-top: 28px; font-size: 1rem; overflow-wrap: anywhere; }
  .showcase-heading, .boundary { grid-template-columns: 1fr; gap: 30px; }
  .showcase-heading h2, .boundary h2, .download-close h2 { font-size: clamp(2.75rem, 13vw, 4rem); }
  .console-stage { margin-right: -14px; margin-left: -14px; border-radius: 20px; }
  .stage-toolbar { padding-right: 14px; padding-left: 14px; }
  .console-window { border-radius: 20px; }
  .feature-list article { grid-template-columns: 44px 1fr; gap: 10px 16px; padding: 26px 0; }
  .feature-list p { grid-column: 2; }
  .download-close { min-height: 420px; }
  .site-footer { grid-template-columns: 1fr auto; padding: 24px 0; }
  .site-footer span:nth-child(2) { grid-column: 1 / -1; grid-row: 2; justify-self: start; text-align: left; }
}

@media (max-width: 600px) {
  .hero-actions { width: 100%; display: grid; }
  .button { width: 100%; }
}

@media (max-width: 480px) {
  .release-note span:last-child { flex-basis: 100%; }
  .release-note span:last-child::before { display: none; }
  .stage-toolbar > span { display: none; }
  .stage-toolbar { justify-content: flex-end; }
  .stage-theme-switch button { min-height: 38px; }
  .feature-list article { grid-template-columns: 34px 1fr; }
}

@media (pointer: coarse) {
  .site-nav a, .stage-theme-switch button { min-height: 44px; display: inline-flex; align-items: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}