:root {
  color-scheme: dark;
  --bg: #0F0F0F;
  --panel-0: #141414;
  --panel: #181818;
  --panel-1: #1C1C1C;
  --panel-2: #212121;
  --line: #2B2B2B;
  --line-2: #3A3A3A;
  --accent: #9168F0;
  --accent-dark: #6A3FD6;
  --white: #FFFFFF;
  --ink: #000000;
  --text: #E8E8E8;
  --text-hi: #F5F5F5;
  --muted: #9A9A9A;
  --dim: #666666;
  --silver: #8A8A8A;
  --success: #3CC07A;
  --warn: #E0A23A;
  --error: #E5534B;
  --clear: transparent;
  --accent-soft: color-mix(in srgb, var(--accent) 78%, var(--white));
  --grad: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  --glow: radial-gradient(closest-side, color-mix(in srgb, var(--accent) 24%, var(--clear)) 0%, color-mix(in srgb, var(--accent-dark) 10%, var(--clear)) 55%, var(--clear) 100%);
  --veil: rgb(0 0 0 / .7);
  --shadow-card: inset 0 1px 0 rgb(255 255 255 / .035), 0 14px 36px -14px rgb(0 0 0 / .65);
  --shadow-win: 0 0 0 1px rgb(0 0 0 / .45), 0 2px 0 rgb(255 255 255 / .02), 0 24px 48px -18px rgb(0 0 0 / .55), 0 70px 120px -40px rgb(0 0 0 / .75);
  --shadow-phone: 0 0 0 4px var(--bg), 0 22px 40px -8px rgb(0 0 0 / .8), 0 60px 100px -24px rgb(0 0 0 / .95);
  --shadow-button: inset 0 1px 0 color-mix(in srgb, var(--white) 24%, var(--clear)), 0 0 0 1px color-mix(in srgb, var(--accent) 55%, var(--clear)), 0 12px 26px -12px color-mix(in srgb, var(--accent-dark) 85%, var(--clear));
  --f-display: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --f-body: "Inter", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 10px;
  --r-xl: 14px;
  --r-tile: 28px;
  --r-phone: 34px;
  --r-pill: 999px;
  --r-round: 50%;
  --r-logo: 30%;
  --container: 1200px;
  --header-container: 1280px;
  --reading: 800px;
  --gutter: clamp(20px, 8vw, 120px);
  --nav-h: 64px;
  --section-space: clamp(80px, 12vh, 144px);
  --ease: cubic-bezier(.2, .7, .2, 1);
  --fast: .2s;
  --slow: .6s;
}
*, *::before, *::after { box-sizing: border-box; }
html {
  background: var(--bg);
  color: var(--text);
  font-family: var(--f-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.75; }
html.nav-open { overflow: hidden; }
[hidden] { display: none !important; }
a { color: var(--accent-soft); text-decoration: none; text-underline-offset: .2em; }
a:hover { text-decoration: underline; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; }
a:focus-visible, button:focus-visible, summary:focus-visible, [tabindex]:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}
img, svg { max-width: 100%; vertical-align: middle; }
img { height: auto; }
p, li, dd { overflow-wrap: break-word; }
h1, h2, h3, h4 { font-family: var(--f-display); font-weight: 500; color: var(--text-hi); line-height: 1.25; text-wrap: balance; }
h1 { font-size: clamp(34px, 1rem + 2.2vw, 48px); letter-spacing: -.01em; }
h2 { font-size: clamp(26px, 3vw, 40px); }
h3 { font-size: 22px; }
h4 { font-size: 18px; }
h1, h2, h3, h4, p { margin-top: 0; }
code, pre, kbd, samp { font-family: var(--f-mono); }
code { overflow-wrap: anywhere; }
pre {
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
  color: var(--text);
  font-size: 13px;
  line-height: 1.8;
}
pre code { white-space: pre; overflow-wrap: normal; word-break: normal; }
::selection { background: var(--accent-dark); color: var(--white); }
.wrap {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  padding-inline: var(--gutter);
  margin-inline: auto;
}
.reading { max-width: calc(var(--reading) + var(--gutter) * 2); }
.section { padding-top: var(--section-space); padding-bottom: var(--section-space); }
.section-line { border-top: 1px solid var(--line); }
.grid-two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.grid-two > *, .hero__in > *, .footer-grid > *, .manifesto__in > *, .card > *, .doc-layout > * { min-width: 0; }
.flow > * + * { margin-top: 24px; }
.nowrap { white-space: nowrap; }
.muted { color: var(--muted); }
.mono { font-family: var(--f-mono); }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.ico { width: 16px; height: 16px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 20px; padding: 8px 16px; background: var(--panel-2); color: var(--text-hi); transform: translateY(-160%); }
.skip-link:focus { transform: none; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 10px 22px;
  border: 1px solid var(--clear);
  border-radius: var(--r-md);
  background: var(--grad);
  color: var(--white);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  text-align: center;
  box-shadow: var(--shadow-button);
  transition: filter var(--fast), transform var(--fast), border-color var(--fast);
}
.btn:hover, .btn.is-hover { filter: brightness(1.08); transform: translateY(-1px); text-decoration: none; }
.btn:active, .btn.is-pressed { transform: translateY(1px); filter: brightness(.96); }
.btn--secondary { background: var(--panel); color: var(--text); border-color: var(--line); box-shadow: none; }
.btn--secondary:hover { border-color: var(--line-2); }
.btn--quiet { background: var(--clear); color: var(--accent-soft); box-shadow: none; }
.btn:disabled, .btn[aria-disabled="true"] { background: var(--panel-2); color: var(--muted); border-color: var(--line); box-shadow: none; transform: none; filter: none; }
.btn[aria-disabled="true"] { pointer-events: none; }
.more { display: inline-flex; align-items: center; gap: 6px; color: var(--accent-soft); font-size: 15px; font-weight: 500; }
.cta { display: flex; align-items: center; flex-wrap: wrap; gap: 26px; }
.card, .panel {
  padding: clamp(20px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow-card);
}
.card p:last-child, .panel p:last-child { margin-bottom: 0; }
.card h3 { margin-bottom: 14px; }
.card p { color: var(--muted); }
.prose { min-width: 0; }
.prose h2 { margin-top: 64px; margin-bottom: 24px; scroll-margin-top: 24px; }
.prose h3 { margin-top: 36px; margin-bottom: 16px; }
.prose p, .prose ul, .prose ol { margin-bottom: 24px; }
.prose li + li { margin-top: 10px; }
.prose :not(pre) > code { background: var(--panel-2); color: var(--text); border-radius: var(--r-sm); padding: .12em .35em; font-size: .88em; }
.prose img { display: block; margin-block: 28px; }
.reveal { opacity: 1; transform: none; }
.reveal-ready .reveal:not(.shown) { opacity: 0; transform: translateY(18px); }
.reveal-ready .reveal { transition: opacity var(--slow) var(--ease), transform var(--slow) var(--ease); }

.topbar { position: relative; z-index: 40; height: var(--nav-h); border-bottom: 1px solid var(--line); background: var(--bg); color: var(--text); }
.topbar__in {
  width: 100%;
  max-width: min(100%, calc(var(--header-container) + var(--gutter) * 2));
  padding-inline: var(--gutter);
  margin-inline: auto;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 40px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; font-size: 16px; font-weight: 500; color: var(--text-hi); letter-spacing: .01em; }
.brand:hover { text-decoration: none; }
.brand__mark { display: block; width: 28px; height: 28px; flex-shrink: 0; border-radius: var(--r-logo); }
.tabs { min-width: 0; margin-left: auto; height: 100%; }
.tabs ul { display: flex; align-items: center; list-style: none; margin: 0; padding: 0; height: 100%; gap: 30px; }
.tabs li { height: 100%; }
.tab { position: relative; display: flex; align-items: center; height: 100%; white-space: nowrap; font-size: 14.5px; color: var(--muted); transition: color var(--fast); }
.tab:hover { color: var(--text); text-decoration: none; }
.tab::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; border-radius: var(--r-sm); background: var(--line-2); color: var(--text); transform: scaleX(0); transition: transform .25s var(--ease); }
.tab:hover::after { transform: scaleX(1); }
.tab.is-current { color: var(--text-hi); }
.tab.is-current::after { background: var(--grad); color: var(--white); transform: scaleX(1); }
.header-tools { display: flex; align-items: center; flex-shrink: 0; gap: 10px; }
.language { position: relative; }
.lang { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 34px; padding: 6px 12px; border: 1px solid var(--line); border-radius: var(--r-md); background: var(--clear); color: var(--muted); font: inherit; font-size: 13.5px; white-space: nowrap; list-style: none; cursor: pointer; }
.lang::-webkit-details-marker { display: none; }
.lang:hover { color: var(--text); border-color: var(--line-2); }
.lang-short { display: none; }
.language-menu {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: 200px;
  padding: 8px;
  margin: 0;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow-card);
}
.language-menu a { display: flex; align-items: center; min-height: 44px; padding: 8px 12px; color: var(--muted); border-radius: var(--r-sm); }
.language-menu a:hover, .language-menu a[aria-current] { background: var(--panel-2); color: var(--text-hi); text-decoration: none; }
.menu-toggle { display: none; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; border: 1px solid var(--line); border-radius: var(--r-md); background: var(--bg); color: var(--text); }
.menu-toggle svg { width: 20px; height: 20px; }
.nav-veil { position: fixed; inset: var(--nav-h) 0 0; z-index: 1; border: 0; background: var(--veil); color: var(--text); }
.mobile-drawer { position: absolute; top: var(--nav-h); left: 0; right: 0; z-index: 2; max-height: calc(100dvh - var(--nav-h)); overflow-y: auto; overscroll-behavior: contain; padding: 20px var(--gutter) 28px; border-bottom: 1px solid var(--line); background: var(--bg); color: var(--text); }
.mobile-drawer ul { list-style: none; padding: 0; margin: 0; }
.mobile-drawer a { display: flex; align-items: center; width: 100%; min-height: 48px; padding: 10px 12px; color: var(--text); border-bottom: 1px solid var(--line); }
.mobile-drawer a[aria-current] { color: var(--accent-soft); }
.drawer-label { margin: 24px 12px 8px; color: var(--muted); font-size: 13px; }

.site-footer { border-top: 1px solid var(--line); padding-top: 72px; padding-bottom: 32px; background: var(--bg); color: var(--muted); font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr 1.3fr .7fr; gap: 40px; }
.footer-grid h2 { font-size: 14px; font-weight: 500; margin-bottom: 20px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li + li { margin-top: 10px; }
.footer-grid a { color: var(--muted); }
.footer-grid a:hover { color: var(--accent-soft); }
.footer-grid .brand { color: var(--text-hi); }
.footer-intro { max-width: 24em; margin-top: 20px; }
.footer-bottom { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); padding-top: 24px; margin-top: 56px; font-size: 13px; }
.footer-bottom p { margin: 0; }
.footer-legal { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-legal a { color: var(--muted); }

@media (max-width: 1100px) {
  .topbar__in { gap: 24px; }
  .tabs ul { gap: 20px; }
}
@media (max-width: 960px) {
  .topbar__in > .tabs { display: none; }
  .header-tools { margin-left: auto; }
  .menu-toggle { display: inline-flex; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 961px) {
  .mobile-drawer, .nav-veil { display: none !important; }
}
@media (max-width: 768px) {
  h1 { font-size: clamp(24px, 4vw, 30px); }
  h2 { font-size: clamp(24px, 5vw, 32px); }
  .grid-two { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 640px) {
  :root { --gutter: 20px; }
  .topbar__in { gap: 12px; }
  .lang-full { display: none; }
  .lang-short { display: inline; }
  .lang { min-height: 44px; }
  .tilt, [data-tilt] { transform: none !important; }
  .cta { gap: 20px; }
  .footer-grid { gap: 32px 24px; }
  .footer-brand { grid-column: 1 / -1; }
  .prose ul, .prose ol { padding-left: 22px; }
}
@media (max-width: 360px) {
  .brand__name { font-size: 14px; }
  .header-tools { gap: 6px; }
  .lang { padding-inline: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal-ready .reveal:not(.shown) { opacity: 1; transform: none; }
}