:root {
  color-scheme: dark;
  --bg: #151515;
  --bg-panel: #1C1C1C;
  --bg-panel-2: #242424;
  --border: #2E2E2E;
  --accent: #E7B49B;
  --accent-dark: #C38E72;
  --text: #ECEAE4;
  --text-soft: #BEBCB6;
  --text-muted: #8F8E8A;
  --success: #86B89C;
  --warn: #D8B66E;
  --error: #D97A70;
  --field-cool: #6F84A8;
  --field-clay: #7B5446;
  --composer: #E9E7DF;
  --composer-chip: #DCD9CF;
  --ink: #2A2926;
  --ink-muted: #8A877F;
  --white: #FFFFFF;
  --clear: transparent;
  --veil-line: rgba(236,234,228,.14);
  --veil-line-strong: rgba(236,234,228,.30);
  --veil-fill: rgba(21,21,21,.38);
  --veil-fill-strong: rgba(21,21,21,.82);
  --shell-fill: rgba(255,255,255,.10);
  --shell-line: rgba(255,255,255,.34);
  --shell-inner: rgba(255,255,255,.55);
  --ink-line: rgba(0,0,0,.07);
  --shade-deep: rgba(0,0,0,.58);
  --shade-soft: rgba(0,0,0,.32);
  --cool-a: rgba(111,132,168,.80);
  --cool-b: rgba(111,132,168,.28);
  --clay-a: rgba(123,84,70,.92);
  --apricot-a: rgba(231,180,155,.50);
  --mist-a: rgba(150,146,150,.20);
  --glint: rgba(236,234,228,.055);
  --pill-fill: rgba(233,231,223,.80);
  --pill-line: rgba(255,255,255,.45);
  --success-glow: rgba(134,184,156,.22);
  --font-display: "Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body: "Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono: "JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --r-canvas: 32px;
  --r-panel: 28px;
  --r-small: 16px;
  --r-pill: 999px;
  --r-tag: 6px;
  --r-round: 50%;
  --nav-h: 72px;
  --gutter: max(16px, 3vw);
  --reading-width: 1120px;
  --nav-width: 1280px;
  --ease: cubic-bezier(.2,.7,.2,1);
  --speed: .2s;
  --reveal-speed: .6s;
  --tab-cycle: 8s;
  --weight-regular: 400;
  --weight-medium: 500;
}
*, *::before, *::after { box-sizing: border-box; }
html {
  background: var(--bg);
  color: var(--text);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}
html.nav-open { overflow: hidden; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
[hidden] { display: none !important; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button, input, select, textarea {
  max-width: 100%;
  color: var(--text);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-small);
}
button:disabled { cursor: not-allowed; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
svg, .dot, .kicker-dot, .brand-mark { flex-shrink: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
::selection { background: var(--composer); color: var(--ink); }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--weight-regular);
  line-height: 1.2;
  letter-spacing: -.02em;
  text-wrap: balance;
  overflow-wrap: break-word;
}
h1 { font-size: clamp(34px, 3.4vw, 48px); }
h2 { font-size: clamp(28px, 3vw, 40px); }
h3 { font-size: 24px; }
p { margin: 0 0 1.25em; }
strong { font-weight: var(--weight-medium); }
code, pre, kbd { font-family: var(--font-mono); }
code { overflow-wrap: anywhere; }
pre {
  margin: 0;
  padding: 24px;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  background: var(--bg-panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--r-small);
  font-size: 14px;
  line-height: 1.8;
  tab-size: 2;
}
pre code { white-space: pre; overflow-wrap: normal; word-break: normal; }
hr { border: 0; border-top: 1px solid var(--border); margin-block: 40px; }
.wrap {
  width: 100%;
  max-width: calc(var(--reading-width) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-top: 96px; padding-bottom: 96px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.grid > *, .feature-layout > *, .footer-grid > *, .prose > * { min-width: 0; }
.stack > * + * { margin-top: 24px; }
.nowrap { white-space: nowrap; }
.muted { color: var(--text-muted); }
.soft { color: var(--text-soft); }
.mono { font-family: var(--font-mono); }
.small { font-size: 14px; }
.prose { min-width: 0; max-width: 100%; }
.prose h2 { margin-top: 2em; }
.prose h3 { margin-top: 1.7em; }
.prose p, .prose li { color: var(--text-soft); }
.prose a { color: var(--text); text-decoration: underline; text-underline-offset: 4px; }
.prose a:hover { color: var(--accent); }
.prose :not(pre) > code {
  padding: 2px 5px;
  background: var(--bg-panel-2);
  color: var(--text);
  border-radius: var(--r-tag);
}
.prose li + li { margin-top: 8px; }
.panel, .card {
  min-width: 0;
  padding: 30px;
  border: 1px solid var(--border);
  border-radius: var(--r-panel);
  background: var(--bg-panel);
  color: var(--text);
}
.panel-raised { background: var(--bg-panel-2); color: var(--text); }
.card h3 { margin-top: 0; }
.cta-row, .button-samples {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.cta-row { justify-content: center; margin: 0 0 18px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 48px;
  padding: 10px 26px;
  border: 1px solid var(--clear);
  border-radius: var(--r-pill);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: var(--weight-medium);
  letter-spacing: .005em;
  text-align: center;
  transition: background-color var(--speed) var(--ease), color var(--speed) var(--ease), border-color var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.btn svg { width: 16px; height: 16px; }
.btn-solid { background: var(--text); color: var(--bg); }
.btn-solid:hover, .btn-solid.is-hover { background: var(--composer); color: var(--bg); transform: translateY(-1px); }
.btn-line { border-color: var(--veil-line-strong); background: var(--veil-fill); color: var(--text); }
.btn-line:hover, .btn-line.is-hover { border-color: var(--accent); color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn.is-focus { outline: 2px solid var(--accent); outline-offset: 3px; }
.btn:disabled, .btn[aria-disabled="true"] {
  background: var(--bg-panel-2);
  color: var(--text-muted);
  border-color: var(--border);
  transform: none;
}
#site-header { position: relative; z-index: 30; }
.topbar {
  position: relative;
  z-index: 30;
  height: var(--nav-h);
  width: 100%;
  max-width: min(100%, calc(var(--nav-width) + var(--gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--bg);
  color: var(--text);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  font-size: 17px;
  font-weight: var(--weight-medium);
  letter-spacing: -.01em;
  color: var(--text);
}
.brand-mark { width: 30px; height: 30px; }
.topnav { display: flex; align-items: center; min-width: 0; margin-left: auto; }
.topnav-list {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 34px;
}
.topnav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  color: var(--text-muted);
  white-space: nowrap;
}
.topnav-list a:hover { color: var(--accent); }
.topnav-list a[aria-current="page"] { color: var(--text); font-weight: var(--weight-medium); }
.header-tools { display: flex; align-items: center; gap: 10px; flex-shrink: 0; margin-left: 16px; }
.language { position: relative; }
.lang {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  min-height: 38px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  white-space: nowrap;
}
.lang:hover { border-color: var(--accent); color: var(--accent); }
.lang-short { display: none; }
.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  width: 190px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: var(--r-small);
  background: var(--bg-panel);
  color: var(--text);
  z-index: 34;
}
.lang-menu a { display: flex; align-items: center; min-height: 44px; padding: 8px 12px; border-radius: var(--r-tag); }
.lang-menu a:hover { background: var(--bg-panel-2); color: var(--accent); }
.lang-menu a[aria-current="true"] { color: var(--text-soft); }
.menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-pill);
  background: var(--bg);
  color: var(--text);
}
.menu-toggle svg { width: 20px; height: 20px; }
.mobile-drawer { display: none; }
.nav-veil {
  position: fixed;
  inset: var(--nav-h) 0 0;
  z-index: 29;
  background: var(--veil-fill-strong);
  color: var(--text);
}
.skip-link {
  position: absolute;
  left: var(--gutter);
  top: 12px;
  z-index: 50;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  padding: 0;
  background: var(--text);
  color: var(--bg);
  border-radius: var(--r-pill);
}
.skip-link:focus {
  width: auto;
  height: auto;
  overflow: visible;
  clip-path: none;
  padding: 12px 20px;
}
.hero { padding: 0 var(--gutter) 22px; overflow-x: clip; }
.stage {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: max(760px, calc(100svh - var(--nav-h) - 22px));
  border-radius: 0 0 var(--r-canvas) var(--r-canvas);
  display: grid;
  align-content: center;
  justify-items: center;
  padding: 40px 32px 60px;
  text-align: center;
  color: var(--text);
  background:
    radial-gradient(42% 48% at 90% 108%, var(--apricot-a), var(--clear) 72%),
    radial-gradient(62% 66% at 104% 104%, var(--clay-a), var(--clear) 70%),
    radial-gradient(64% 70% at -4% 104%, var(--cool-a), var(--clear) 70%),
    radial-gradient(40% 50% at 22% 92%, var(--cool-b), var(--clear) 70%),
    radial-gradient(50% 40% at 50% 112%, var(--mist-a), var(--clear) 75%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg) 18%, var(--bg-panel) 52%, var(--bg-panel-2) 100%);
}
.stage > * { min-width: 0; max-width: 100%; }
.stage::before, .stage::after { content: ""; position: absolute; z-index: -1; pointer-events: none; }
.stage::before {
  inset: -10% 40% 30% -20%;
  background: linear-gradient(118deg, var(--clear) 32%, var(--glint) 44%, var(--clear) 56%);
}
.stage::after {
  inset: -12% 52% 40% -30%;
  background: linear-gradient(118deg, var(--clear) 44%, var(--glint) 50%, var(--clear) 58%);
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 30px;
  padding: 3px 14px 3px 12px;
  margin: 0 0 20px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--veil-fill);
  color: var(--text-muted);
  font-size: 13px;
}
.kicker-dot { width: 7px; height: 7px; border-radius: var(--r-round); background: var(--success); box-shadow: 0 0 0 4px var(--success-glow); }
.hero-title {
  margin: 0 0 16px;
  font-size: clamp(26px, 1.2rem + 2.2vw, 48px);
  line-height: 1.14;
  font-weight: var(--weight-regular);
}
.hero-title .line { display: block; }
.hero-title .line-soft { color: var(--text-soft); }
.hero-lede { margin: 0 0 26px; max-width: 640px; font-size: 16px; line-height: 1.65; color: var(--text-muted); }
.hero-lede strong { color: var(--text); }
.os-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: 0 0 34px; padding: 0; list-style: none; }
.os-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 34px;
  padding: 5px 14px 5px 12px;
  border: 1px solid var(--veil-line);
  border-radius: var(--r-pill);
  background: var(--veil-fill);
  color: var(--text-muted);
  font-size: 13px;
}
.os-chip svg { width: 14px; height: 14px; }
.os-chip:hover { color: var(--accent); border-color: var(--accent-dark); }
.site-footer { border-top: 1px solid var(--border); padding-top: 64px; padding-bottom: 28px; background: var(--bg); color: var(--text); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr 1fr; gap: 40px; }
.footer-grid h2 { margin: 0 0 18px; font-size: 15px; letter-spacing: 0; font-weight: var(--weight-medium); }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li + li { margin-top: 10px; }
.footer-grid a:not(.brand), .footer-note { font-size: 14px; color: var(--text-muted); }
.footer-grid a:hover { color: var(--accent); }
.footer-note { margin-top: 20px; max-width: 280px; }
.footer-bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 16px 28px; color: var(--text-muted); font-size: 13px; }
.reveal { opacity: 1; transform: none; }
.reveal.is-waiting { opacity: 0; transform: translateY(16px); }
.reveal.shown { opacity: 1; transform: none; transition: opacity var(--reveal-speed) var(--ease), transform var(--reveal-speed) var(--ease); }
.decorated { position: relative; overflow-x: clip; }
@media (max-width: 1280px) {
  .topnav-list { gap: 22px; }
  .topbar { gap: 16px; }
}
@media (max-width: 1100px) {
  .topnav { display: none; }
  .header-tools { margin-left: auto; }
  .menu-toggle { display: inline-flex; }
  .mobile-drawer:not([hidden]) {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: var(--nav-h);
    padding: 16px var(--gutter) 24px;
    max-height: calc(100dvh - var(--nav-h));
    overflow-y: auto;
    overscroll-behavior: contain;
    border-bottom: 1px solid var(--border);
    background: var(--bg-panel);
    color: var(--text);
    z-index: 33;
  }
  .mobile-drawer ul { margin: 0; padding: 0; list-style: none; }
  .mobile-drawer a { display: flex; align-items: center; width: 100%; min-height: 48px; padding: 12px 16px; }
  .mobile-drawer a[aria-current="page"] { color: var(--text); font-weight: var(--weight-medium); }
  .drawer-languages { border-top: 1px solid var(--border); margin-top: 12px; padding-top: 12px; }
  .corner-link { display: none !important; }
  .preview-mobile { display: block; }
  .preview-mobile summary { list-style: none; }
}
@media (max-width: 860px) {
  .stage { padding: 40px 18px 48px; border-radius: 0 0 var(--r-panel) var(--r-panel); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
}
@media (max-width: 768px) {
  h1, .hero-title { font-size: clamp(24px, 4vw, 30px); }
  .section { padding-top: 64px; padding-bottom: 64px; }
}
@media (max-width: 640px) {
  .grid { grid-template-columns: minmax(0, 1fr); }
  .tilt, [data-tilt] { transform: none !important; }
  .panel, .card { padding: 22px; }
  .topbar { gap: 10px; }
  .brand { gap: 8px; font-size: 14px; }
  .header-tools { gap: 6px; margin-left: auto; }
  .lang { padding-inline: 12px; }
  .lang-full { display: none; }
  .lang-short { display: inline; }
  pre { padding: 18px; font-size: 13px; }
}
@media (max-width: 520px) {
  .hero { padding: 0 12px 16px; }
  .hero-title { font-size: clamp(24px, 7vw, 30px); }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .reveal.is-waiting { opacity: 1; transform: none; }
}