:root {
  color-scheme: dark;
  --bg: #1d1430;
  --bg-head: #180f29;
  --bg-deep: #150d25;
  --bg-panel: #2a1f45;
  --bg-panel-2: #362a58;
  --border: #4a3b72;
  --line: rgba(155, 107, 255, .16);
  --accent: #ff3fa4;
  --accent-dark: #d61f80;
  --accent-wash: rgba(255, 63, 164, .08);
  --violet: #9b6bff;
  --violet-shade: #7550e0;
  --violet-light: #c0a3ff;
  --amber: #ffc23d;
  --text: #f4effc;
  --text-muted: #b3a7cf;
  --success: #7ee0a8;
  --warn: var(--amber);
  --error: #ff5c6c;
  --ink: #120a22;
  --ink-wash: rgba(18, 10, 34, .55);
  --on-accent: #1d1430;
  --transparent: transparent;
  --shadow-ink: rgba(8, 4, 18, .8);
  --shadow-soft: rgba(8, 4, 18, .45);
  --pink-shadow: rgba(255, 63, 164, .5);
  --pink-ring: rgba(255, 63, 164, .18);
  --violet-ring: rgba(155, 107, 255, .2);
  --amber-ring: rgba(255, 194, 61, .18);
  --beam-violet: rgba(155, 107, 255, .09);
  --grad-edge: linear-gradient(135deg, var(--accent), var(--amber));
  --shadow-card: 0 22px 40px -16px var(--shadow-ink), 0 3px 0 var(--shadow-soft);
  --shadow-btn: 0 4px 0 var(--accent-dark), 0 16px 32px -12px var(--pink-shadow);
  --shadow-btn-hover: 0 6px 0 var(--accent-dark), 0 20px 36px -12px var(--pink-shadow);
  --shadow-btn-press: 0 1px 0 var(--accent-dark), 0 8px 18px -10px var(--pink-shadow);
  --dot-ring-pink: 0 0 0 3px var(--pink-ring);
  --dot-ring-violet: 0 0 0 3px var(--violet-ring);
  --dot-ring-amber: 0 0 0 3px var(--amber-ring);
  --r-card: 6px;
  --r-btn: 8px;
  --r-chip: 4px;
  --r-mark: 10px;
  --r-round: 50%;
  --r-indicator: 3px 3px 0 0;
  --font-display: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --fs-body: 16px;
  --fs-small: 13px;
  --fs-caption: 12px;
  --fs-nav: 14.5px;
  --fs-brand: 17px;
  --fs-brand-sub: 11px;
  --fs-eyebrow: 12.5px;
  --fs-lede: 16.5px;
  --fs-h1: clamp(34px, calc(3.2vw + 2px), 48px);
  --fs-h2: clamp(24px, 2.2vw, 32px);
  --fs-h3: 21px;
  --fs-code: 14px;
  --weight-display: 900;
  --weight-title: 800;
  --weight-strong: 700;
  --weight-label: 600;
  --tracking-display: -.035em;
  --tracking-cjk: -.01em;
  --tracking-label: .05em;
  --leading-body: 1.6;
  --leading-title: 1.15;
  --gutter: 56px;
  --content-width: 1328px;
  --reading-width: 800px;
  --head-width: 1328px;
  --head-h: 72px;
  --section-space: 160px;
  --grain-opacity: .42;
  --duration: .2s;
  --duration-reveal: .55s;
}
*, *::before, *::after { box-sizing: border-box; }
html { background: var(--bg); 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: var(--fs-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--accent); color: var(--on-accent); }
[hidden] { display: none !important; }
img, svg { max-width: 100%; }
img { height: auto; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: var(--transparent); }
button { cursor: pointer; }
a { color: var(--violet-light); text-underline-offset: .2em; }
a:hover { color: var(--text); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }
h1, h2, h3, h4 { font-family: var(--font-display); text-wrap: balance; }
h1 { font-size: var(--fs-h1); font-weight: var(--weight-display); line-height: 1.1; letter-spacing: var(--tracking-cjk); }
h2 { font-size: var(--fs-h2); line-height: 1.25; letter-spacing: var(--tracking-cjk); }
h3 { font-size: var(--fs-h3); line-height: 1.35; }
p { margin-top: 0; }
strong { font-weight: var(--weight-strong); }
code, pre, kbd { font-family: var(--font-mono); font-size: var(--fs-code); }
code { overflow-wrap: anywhere; }
pre {
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.7;
  -webkit-overflow-scrolling: touch;
}
pre code { white-space: pre; overflow-wrap: normal; word-break: normal; }
hr { border: 0; border-top: 1px solid var(--line); margin-block: 32px; }
.wrap {
  width: 100%;
  max-width: calc(var(--content-width) + var(--gutter) * 2);
  padding-inline: var(--gutter);
  margin-inline: auto;
}
.reading { max-width: calc(var(--reading-width) + var(--gutter) * 2); }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.grid > *, .hero-grid > *, .footer-grid > *, .head-inner > * { min-width: 0; }
.section { padding-top: var(--section-space); padding-bottom: 0; }
.section:last-child { padding-bottom: var(--section-space); }
.decorated, .hero { position: relative; overflow-x: clip; }
.nowrap { white-space: nowrap; }
.muted, .caption { color: var(--text-muted); }
.caption { font-size: var(--fs-caption); }
.kicker { margin: 0 0 12px; font: var(--weight-label) var(--fs-eyebrow)/1.6 var(--font-mono); color: var(--violet-light); letter-spacing: .04em; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  top: 8px;
  left: 16px;
  z-index: 100;
  padding: 10px 16px;
  transform: translateY(-160%);
  border-radius: var(--r-btn);
  background: var(--amber);
  color: var(--ink);
}
.skip-link:focus { transform: none; }
.grain {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 50;
  opacity: var(--grain-opacity);
  mix-blend-mode: overlay;
}
.site-head { position: relative; z-index: 40; background: var(--bg-head); color: var(--text); border-bottom: 1px solid var(--line); }
.head-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--head-h);
  gap: 24px;
  width: 100%;
  max-width: min(100%, calc(var(--head-width) + var(--gutter) * 2));
  padding-inline: var(--gutter);
  margin-inline: auto;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; color: var(--text); text-decoration: none; }
.brand-mark {
  display: block;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--r-mark);
  background: var(--bg-panel-2);
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--border), 0 6px 14px -6px var(--shadow-ink);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--font-display); font-weight: var(--weight-title); font-size: var(--fs-brand); letter-spacing: var(--tracking-cjk); }
.brand-sub { font-family: var(--font-mono); font-size: var(--fs-brand-sub); color: var(--text-muted); letter-spacing: .02em; }
.desktop-nav { margin-left: auto; min-width: 0; }
.tabs { display: flex; align-items: center; list-style: none; margin: 0; padding: 0; }
.tab {
  position: relative;
  display: flex;
  align-items: center;
  height: var(--head-h);
  padding-inline: 14px;
  color: var(--text-muted);
  font-size: var(--fs-nav);
  font-weight: var(--weight-label);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--duration) ease;
}
.tab::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: -1px;
  height: 3px;
  border-radius: var(--r-indicator);
  background: var(--accent);
  transform: scaleX(0);
  opacity: 0;
  transition: transform .28s ease, opacity .28s ease;
}
.tab:hover { color: var(--text); }
.tab:hover::after { transform: scaleX(.45); opacity: .55; }
.tab[aria-current="page"] { color: var(--text); }
.tab[aria-current="page"]::after { transform: scaleX(1); opacity: 1; }
.head-tools { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.language-control { position: relative; }
.lang {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 36px;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-btn);
  background: var(--transparent);
  color: var(--text);
  font-size: var(--fs-small);
  font-weight: var(--weight-label);
  white-space: nowrap;
}
.lang:hover { border-color: var(--violet); }
.lang svg { width: 15px; height: 15px; color: var(--violet-light); flex-shrink: 0; }
.lang-caret { color: var(--text-muted); font-size: var(--fs-brand-sub); }
.lang-short { display: none; }
.language-list {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  min-width: 180px;
  margin: 0;
  padding: 6px;
  list-style: none;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  background: var(--bg-panel);
  color: var(--text);
  box-shadow: var(--shadow-card);
}
.language-list a { display: flex; align-items: center; min-height: 44px; padding: 8px 12px; color: var(--text); text-decoration: none; border-radius: var(--r-chip); }
.language-list a:hover, .language-list a[aria-current] { background: var(--bg-panel-2); color: var(--text); }
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--r-btn);
  background: var(--bg-panel);
  color: var(--text);
}
.menu-toggle svg { width: 22px; height: 22px; }
.mobile-drawer { display: none; }
.menu-veil { position: fixed; inset: var(--head-h) 0 0; z-index: -1; border: 0; background: var(--ink-wash); color: var(--text); }
.hero { padding-top: 36px; padding-bottom: 64px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 44fr) minmax(0, 56fr); gap: 48px; align-items: center; }
.hero-copy { position: relative; z-index: 2; max-width: 572px; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0; font-family: var(--font-mono); font-size: var(--fs-eyebrow); letter-spacing: var(--tracking-label); color: var(--text-muted); }
.eyebrow-bar { width: 20px; height: 3px; border-radius: var(--r-chip); background: var(--accent); flex-shrink: 0; }
.hero-title { margin: 22px 0 26px; font-size: var(--fs-h1); font-weight: var(--weight-display); line-height: 1.1; letter-spacing: var(--tracking-cjk); }
.ht-line { display: block; }
.ht-key { display: inline-block; margin: .06em 0 .16em; color: var(--accent); transform: translate(.05em, .12em) rotate(-4deg); transform-origin: 0 70%; letter-spacing: var(--tracking-cjk); }
.hero-lede { margin: 0; max-width: 530px; font-size: var(--fs-lede); line-height: 1.8; color: var(--text-muted); }
.hero-lede strong { color: var(--text); }
.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  min-height: 52px;
  max-width: 100%;
  padding: 12px 24px;
  border: 1px solid var(--transparent);
  border-radius: var(--r-btn);
  background: var(--bg-panel);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: var(--weight-title);
  text-align: center;
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease, border-color .18s ease;
}
.btn svg { width: 19px; height: 19px; flex-shrink: 0; }
.btn-primary { background: var(--accent); color: var(--on-accent); box-shadow: var(--shadow-btn); }
.btn-primary:hover, .btn-primary.is-hover { background: var(--accent); color: var(--on-accent); transform: translateY(-2px); box-shadow: var(--shadow-btn-hover); }
.btn-primary:active, .btn-primary.is-pressed { transform: translateY(3px); box-shadow: var(--shadow-btn-press); }
.btn-ghost { border: 1.5px solid var(--accent); background: var(--bg-panel); color: var(--text); }
.btn-ghost svg { color: var(--accent); }
.btn-ghost:hover { background: var(--accent-wash); color: var(--text); }
.btn:disabled, .btn[aria-disabled="true"] { background: var(--bg-panel-2); color: var(--text-muted); border-color: var(--border); box-shadow: none; cursor: not-allowed; transform: none; }
.btn.is-focus { outline: 2px solid var(--amber); outline-offset: 3px; }
.platforms { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 0; margin-top: 32px; }
.devices { display: flex; flex-wrap: wrap; align-items: center; margin: 0; padding: 0; list-style: none; }
.device { display: flex; align-items: center; gap: 7px; padding-inline: 16px; border-left: 1px solid var(--line); font-size: var(--fs-small); font-weight: var(--weight-label); color: var(--text-muted); text-decoration: none; white-space: nowrap; }
.devices li:first-child .device { padding-left: 0; border-left: 0; }
.device svg { width: 20px; height: 20px; flex-shrink: 0; color: var(--violet-light); fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.store-pill { display: inline-flex; align-items: center; min-height: 26px; margin-left: 4px; padding-inline: 10px; border: 1px solid var(--accent); border-radius: var(--r-chip); font-family: var(--font-mono); font-size: var(--fs-caption); font-weight: var(--weight-strong); color: var(--accent); text-decoration: none; }
.sys-note { margin: 12px 0 0; font-size: var(--fs-eyebrow); color: var(--text-muted); }
.card, .panel {
  position: relative;
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--transparent);
  border-radius: var(--r-card);
  background: linear-gradient(var(--bg-panel), var(--bg-panel)) padding-box, var(--grad-edge) border-box;
  color: var(--text);
  box-shadow: var(--shadow-card);
}
.panel { overflow: clip; }
.panel::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(40deg, var(--transparent) 65%, var(--beam-violet) 65%, var(--transparent) 84%); }
.panel > * { position: relative; }
.prose { min-width: 0; overflow-wrap: break-word; }
.prose h2 { margin-top: 64px; margin-bottom: 20px; }
.prose h3 { margin-top: 36px; margin-bottom: 16px; }
.prose p, .prose li { line-height: 1.85; }
.prose li + li { margin-top: 8px; }
.prose img { max-width: 100%; }
.prose :not(pre) > code { color: var(--violet-light); }
.reveal { opacity: 1; transform: none; }
.reveal-pending { opacity: 0; transform: translateY(18px); transition: opacity var(--duration-reveal) ease, transform var(--duration-reveal) ease; }
.reveal.shown { opacity: 1; transform: none; }
.site-foot { margin-top: var(--section-space); padding-top: 56px; padding-bottom: 32px; background: var(--bg-head); color: var(--text); border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 1.3fr .8fr 1.3fr .7fr; gap: 40px; }
.footer-title { margin: 0 0 16px; font-size: var(--fs-body); }
.footer-about p { margin-top: 20px; color: var(--text-muted); font-size: var(--fs-small); max-width: 330px; }
.footer-links { list-style: none; margin: 0; padding: 0; }
.footer-links a { display: inline-block; padding-block: 6px; color: var(--text-muted); text-decoration: none; font-size: var(--fs-small); }
.footer-links a:hover { color: var(--text); }
.footer-bottom { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--text-muted); font-size: var(--fs-caption); }
.legal-links { display: flex; flex-wrap: wrap; gap: 18px; }
.legal-links a { color: var(--text-muted); }
@media (min-width: 1600px) {
  .head-inner { max-width: min(100%, calc(1280px + var(--gutter) * 2)); }
}
@media (max-width: 1279px) {
  .site-head:not(.preview-head) .desktop-nav { display: none; }
  .head-tools { margin-left: auto; }
  .site-head:not(.preview-head) .menu-toggle { display: inline-flex; }
  .mobile-drawer:not([hidden]) {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 2;
    max-height: calc(100dvh - var(--head-h));
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 16px var(--gutter) 24px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-head);
    color: var(--text);
    box-shadow: var(--shadow-card);
  }
  .mobile-drawer ul { display: block; list-style: none; margin: 0; padding: 0; }
  .mobile-drawer a { display: flex; align-items: center; width: 100%; min-height: 48px; padding: 12px 16px; color: var(--text-muted); text-decoration: none; border-bottom: 1px solid var(--line); }
  .mobile-drawer a[aria-current] { color: var(--text); border-left: 3px solid var(--accent); background: var(--bg-panel); }
  .drawer-label { margin: 20px 16px 8px; font-size: var(--fs-small); color: var(--violet-light); }
  .tab { padding-inline: 10px; }
  .tab::after { left: 10px; right: 10px; }
}
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 56px; }
  .hero-copy { max-width: 640px; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .preview-head .head-inner { height: auto; flex-wrap: wrap; padding-top: 12px; gap: 6px 24px; }
  .preview-head .desktop-nav { order: 3; width: 100%; margin-left: 0; overflow-x: auto; }
  .preview-head .tab { height: 52px; }
}
@media (max-width: 768px) {
  :root { --fs-h1: clamp(24px, 6.8vw, 30px); }
}
@media (max-width: 640px) {
  :root { --gutter: 20px; --fs-lede: 15.5px; }
  .head-inner { gap: 10px; }
  .brand { gap: 9px; flex-shrink: 1; min-width: 0; }
  .brand-text { min-width: 0; overflow-wrap: anywhere; }
  .brand-name { font-size: var(--fs-nav); }
  .brand-sub { font-size: var(--fs-brand-sub); }
  .head-tools { margin-left: auto; gap: 6px; flex-shrink: 0; }
  .lang { min-height: 44px; padding-inline: 10px; }
  .lang-full, .lang svg { display: none; }
  .lang-short { display: inline; }
  .grid, .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .hero { padding-top: 28px; }
  .eyebrow { letter-spacing: normal; }
  .hero-title { margin-top: 18px; margin-bottom: 22px; }
  .platforms { gap: 12px; }
  .devices { gap: 10px 0; }
  .device { padding-inline: 12px; }
  .card, .panel { padding: 22px; }
  .tilt, .ht-key, [class*="tilt-"] { transform: none; }
  .footer-grid { gap: 32px; }
  .footer-bottom { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 360px) {
  :root { --gutter: 16px; }
  .brand-mark { width: 30px; height: 30px; }
  .brand-sub { display: none; }
  .btn { padding-inline: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal, .reveal-pending { opacity: 1; transform: none; }
}