:root {
  color-scheme: light;
  --c-bg: #FFFFFF;
  --c-panel: #F6F6FA;
  --c-navy: #14123A;
  --c-border: #E6E6EE;
  --c-border-strong: #D7D7E2;
  --c-accent: #5B47EE;
  --c-accent-dark: #3F2FC2;
  --c-sky: #3AA6EC;
  --c-text: #16142B;
  --c-muted: #5F5E73;
  --c-faint: #9897AB;
  --c-success: #1FB89A;
  --c-warn: #E9A23B;
  --c-error: #EF5F52;
  --c-on-accent: #FFFFFF;
  --c-accent-tint: #F1EFFE;
  --c-dot: #DADAE4;
  --c-grid-dot: rgba(91,71,238,.16);
  --c-navy-text: rgba(255,255,255,.92);
  --c-navy-muted: rgba(255,255,255,.72);
  --c-navy-line: rgba(255,255,255,.09);
  --c-navy-fill: rgba(255,255,255,.06);
  --c-tab-on: #E9E6FE;
  --c-clear: transparent;
  --c-mask: #000000;
  --c-success-ink: #087965;
  --c-success-tint: #E9F8F4;
  --c-warn-ink: #855318;
  --c-warn-tint: #FFF5E5;
  --c-error-ink: #AC342B;
  --c-error-tint: #FFF0EE;
  --glow-a: rgba(91,71,238,.11);
  --glow-b: rgba(58,166,236,.07);
  --grad-accent: linear-gradient(100deg,var(--c-accent) 0%,var(--c-sky) 100%);
  --grad-btn: linear-gradient(135deg,var(--c-accent) 0%,var(--c-accent-dark) 100%);
  --grad-stroke: linear-gradient(135deg,rgba(91,71,238,.55) 0%,rgba(58,166,236,.38) 45%,rgba(230,230,238,.95) 100%);
  --grad-stroke-soft: linear-gradient(135deg,rgba(91,71,238,.40) 0%,rgba(58,166,236,.30) 60%,rgba(230,230,238,.9) 100%);
  --grad-scene-stroke: linear-gradient(120deg,var(--c-error),var(--c-accent));
  --sh-win: 0 1px 2px rgba(22,20,43,.04),0 10px 26px -8px rgba(22,20,43,.07),0 36px 72px -26px rgba(63,47,194,.18);
  --sh-front: 0 1px 2px rgba(22,20,43,.05),0 16px 34px -10px rgba(22,20,43,.12),0 54px 96px -30px rgba(63,47,194,.32);
  --sh-tag: 0 8px 20px -8px rgba(63,47,194,.38),0 1px 2px rgba(22,20,43,.06);
  --sh-btn: 0 12px 26px -10px rgba(91,71,238,.62),inset 0 1px 0 rgba(255,255,255,.20);
  --sh-seg: 0 5px 14px -5px rgba(91,71,238,.60);
  --sh-pop: 0 22px 52px -18px rgba(22,20,43,.20),0 2px 6px rgba(22,20,43,.05);
  --sh-pill: 0 1px 2px rgba(22,20,43,.05);
  --sh-knob: 0 1px 3px rgba(22,20,43,.22);
  --r-card: 24px;
  --r-card-sm: 20px;
  --r-ctl: 10px;
  --r-btn: 12px;
  --r-item: 14px;
  --r-focus: 8px;
  --r-pill: 999px;
  --r-round: 50%;
  --r-line: 2px;
  --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;
  --fs-xs: 12px;
  --fs-detail: 12.5px;
  --fs-sm: 13px;
  --fs-control: 13.5px;
  --fs-ui: 14px;
  --fs-nav: 15px;
  --fs-body: 16px;
  --fs-lede: 17px;
  --fs-subtitle: 20px;
  --fs-h3: 22px;
  --fs-h2: clamp(26px,2.5vw,34px);
  --fs-h1: clamp(34px,1.6vw + 24px,48px);
  --fs-h1-mobile: 28px;
  --fs-code-small: 11.5px;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --lh-body: 1.6;
  --lh-copy: 1.85;
  --lh-heading: 1.25;
  --tracking-display: -.012em;
  --nav-h: 72px;
  --peek: 28px;
  --page-w: 1280px;
  --reading-w: 1120px;
  --prose-w: 780px;
  --gutter: 40px;
  --section-space: 88px;
  --motion-fast: .18s;
  --motion-reveal: .55s;
  --ease: ease;
  --tilt: -2deg;
}
*,*::before,*::after { box-sizing: border-box; }
html { margin: 0; padding: 0; scroll-behavior: smooth; scroll-padding-top: 24px; }
body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--f-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
html.nav-open { overflow: hidden; }
img,svg { max-width: 100%; vertical-align: middle; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button,input,select,textarea { font: inherit; }
button { color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
button:disabled { cursor: not-allowed; }
ul,ol { margin: 0; padding: 0; }
h1,h2,h3,h4 { margin: 0 0 .6em; font-family: var(--f-display); line-height: var(--lh-heading); font-weight: var(--weight-regular); text-wrap: balance; }
h1 { font-size: var(--fs-h1); letter-spacing: var(--tracking-display); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p { margin: 0 0 1em; }
strong { font-weight: var(--weight-semibold); }
code,kbd,pre { font-family: var(--f-mono); }
code { overflow-wrap: anywhere; }
pre { max-width: 100%; overflow-x: auto; white-space: pre; }
pre code { overflow-wrap: normal; word-break: normal; }
:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 3px; border-radius: var(--r-focus); }
[hidden] { display: none !important; }
:where(.grid,.card-grid,.footer-grid,.scene-layout,.app,.hero__stage) > * { min-width: 0; }
.wrap { width: 100%; max-width: calc(var(--reading-w) + var(--gutter) * 2); margin-inline: auto; padding-inline: var(--gutter); }
.wrap--wide { max-width: calc(var(--page-w) + var(--gutter) * 2); }
.section { padding-top: var(--section-space); padding-bottom: var(--section-space); }
.section--panel { background: var(--c-panel); color: var(--c-text); }
.section--decorated { position: relative; overflow-x: clip; }
.section-heading { max-width: 720px; margin-bottom: 32px; }
.section-heading p,.muted { color: var(--c-muted); }
.keep { white-space: nowrap; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.stack { display: grid; gap: 20px; min-width: 0; }
.inline-row { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.card-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 24px; }
.card,.panel {
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-card);
  background: var(--c-bg);
  color: var(--c-text);
}
.panel { background: var(--c-panel); color: var(--c-text); }
.card--raised { box-shadow: var(--sh-win); }
.card p:last-child,.panel p:last-child { margin-bottom: 0; }
.text-link { color: var(--c-accent-dark); text-decoration: underline; text-underline-offset: 4px; }
.prose { max-width: var(--prose-w); min-width: 0; line-height: var(--lh-copy); }
.prose :where(div,section,article) { min-width: 0; max-width: 100%; }
.prose h2 { margin-top: 2em; scroll-margin-top: 24px; }
.prose h3 { margin-top: 1.6em; }
.prose :where(ul,ol) { padding-left: 1.5em; margin-bottom: 1.2em; }
.prose li + li { margin-top: .5em; }
.prose a:not([class*="btn"]):not([class*="button"]) { color: var(--c-accent-dark); text-decoration: underline; text-underline-offset: 3px; }
.prose :not(pre) > code { background: var(--c-panel); color: var(--c-accent-dark); padding: .12em .3em; border-radius: var(--r-focus); }
.prose pre,.code-block { padding: 22px; border: 1px solid var(--c-border); border-radius: var(--r-card-sm); background: var(--c-panel); color: var(--c-text); font-size: var(--fs-ui); line-height: 1.8; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 12px 24px;
  border: 1px solid var(--c-clear);
  border-radius: var(--r-btn);
  font-size: var(--fs-body);
  font-weight: var(--weight-medium);
  line-height: 1.5;
  text-align: center;
  max-width: 100%;
  transition: transform var(--motion-fast) var(--ease),box-shadow var(--motion-fast) var(--ease),border-color var(--motion-fast) var(--ease),background-color var(--motion-fast) var(--ease);
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn--primary { background: var(--grad-btn); color: var(--c-on-accent); box-shadow: var(--sh-btn); }
.btn--primary:hover,.btn--primary.is-hover { transform: translateY(-1px); }
.btn--primary:active { transform: translateY(1px); box-shadow: var(--sh-pill); }
.btn--ghost { background: var(--c-bg); color: var(--c-text); border-color: var(--c-border-strong); }
.btn--ghost:hover,.btn--ghost.is-hover { border-color: var(--c-accent); color: var(--c-accent-dark); }
.btn--small { min-height: 44px; padding: 9px 18px; font-size: var(--fs-ui); }
.btn:disabled,.btn[aria-disabled="true"] { background: var(--c-panel); color: var(--c-muted); border-color: var(--c-border); box-shadow: none; transform: none; }
.btn.is-focus { outline: 2px solid var(--c-accent); outline-offset: 3px; }
.topbar { position: relative; z-index: 40; height: var(--nav-h); background: var(--c-bg); color: var(--c-text); border-bottom: 1px solid var(--c-border); }
.topbar__inner {
  width: 100%;
  max-width: min(100%,calc(var(--page-w) + var(--gutter) * 2));
  height: 100%;
  padding-inline: var(--gutter);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 44px;
}
.brand { display: inline-flex; align-items: center; gap: 11px; font-family: var(--f-display); font-size: var(--fs-lede); font-weight: var(--weight-semibold); letter-spacing: -.01em; white-space: nowrap; flex-shrink: 0; }
.brand__mark { width: 32px; height: 32px; flex-shrink: 0; }
.mainnav { flex: 1; min-width: 0; }
.mainnav__list { display: flex; align-items: center; list-style: none; margin: 0; padding: 0; gap: 4px; }
.mainnav__link { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 40px; padding: 8px 14px; border-radius: var(--r-ctl); font-size: var(--fs-nav); white-space: nowrap; color: var(--c-text); transition: background-color var(--motion-fast) var(--ease),color var(--motion-fast) var(--ease); }
.mainnav__link:hover { background: var(--c-panel); color: var(--c-text); }
.mainnav__link[aria-current="page"],.mainnav__link.is-current { color: var(--c-accent-dark); font-weight: var(--weight-medium); }
.mainnav__link svg { width: 14px; height: 14px; flex-shrink: 0; color: var(--c-muted); }
.mainnav__more,.language-picker { position: relative; }
.dropdown {
  position: absolute;
  z-index: 5;
  top: calc(100% + 10px);
  left: -10px;
  width: 300px;
  padding: 10px;
  background: var(--c-bg);
  color: var(--c-text);
  border: 1px solid var(--c-border);
  border-radius: var(--r-card-sm);
  box-shadow: var(--sh-pop);
}
.dropdown__label { display: block; padding: 6px 12px 8px; font-size: var(--fs-xs); color: var(--c-muted); letter-spacing: .04em; }
.dropdown__item { display: block; padding: 10px 12px; border-radius: var(--r-item); }
.dropdown__item:hover { background: var(--c-panel); color: var(--c-text); }
.dropdown__item[aria-current="page"] .dropdown__title { color: var(--c-accent-dark); }
.dropdown__title { display: block; font-size: var(--fs-nav); font-weight: var(--weight-medium); }
.dropdown__desc { display: block; font-size: var(--fs-detail); color: var(--c-muted); line-height: 1.5; margin-top: 2px; white-space: normal; }
.topbar__tools { margin-left: auto; display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.lang { display: inline-flex; align-items: center; justify-content: center; gap: 7px; min-height: 38px; padding: 7px 14px; border: 1px solid var(--c-border); border-radius: var(--r-pill); font-size: var(--fs-ui); color: var(--c-text); background: var(--c-bg); white-space: nowrap; }
.lang:hover { border-color: var(--c-border-strong); }
.lang svg { width: 15px; height: 15px; flex-shrink: 0; color: var(--c-muted); }
.lang .lang__chev { width: 12px; height: 12px; }
.lang__short { display: none; }
.language-picker .dropdown { width: 190px; left: auto; right: 0; }
.language-picker .dropdown a { display: flex; align-items: center; min-height: 44px; padding: 9px 12px; border-radius: var(--r-ctl); font-size: var(--fs-ui); }
.language-picker .dropdown a:hover { background: var(--c-panel); color: var(--c-text); }
.language-picker a[aria-current="true"] { color: var(--c-accent-dark); font-weight: var(--weight-semibold); }
.menu-toggle { display: none; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; border: 1px solid var(--c-border); border-radius: var(--r-ctl); background: var(--c-bg); color: var(--c-text); }
.menu-toggle svg { width: 22px; height: 22px; flex-shrink: 0; }
.mobile-drawer { display: none; }
.static-disclosure > summary { list-style: none; cursor: pointer; }
.static-disclosure > summary::-webkit-details-marker { display: none; }
.hero {
  position: relative;
  overflow: hidden;
  overflow-x: clip;
  min-height: calc(100vh - var(--nav-h) - var(--peek));
  min-height: calc(100svh - var(--nav-h) - var(--peek));
  display: grid;
  align-content: center;
  background: var(--c-bg);
  color: var(--c-text);
}
.hero__glow { position: absolute; right: -12%; bottom: -26%; width: min(1040px,80vw); height: 820px; background: radial-gradient(closest-side,var(--glow-a) 0%,var(--glow-b) 52%,var(--c-clear) 100%); pointer-events: none; }
.hero__stage { position: relative; width: 100%; max-width: calc(var(--page-w) + var(--gutter) * 2); height: 760px; padding-inline: var(--gutter); margin-inline: auto; }
.hero__copy { position: relative; z-index: 5; max-width: 520px; padding-top: 44px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }
.chip { display: inline-flex; align-items: center; gap: 7px; min-height: 30px; padding: 4px 13px; border: 1px solid var(--c-border); border-radius: var(--r-pill); background: var(--c-bg); color: var(--c-muted); font-size: var(--fs-detail); box-shadow: var(--sh-pill); max-width: 100%; overflow-wrap: anywhere; }
.chip--lead { border-color: var(--c-clear); background: linear-gradient(var(--c-bg),var(--c-bg)) padding-box,var(--grad-stroke) border-box; color: var(--c-accent-dark); font-weight: var(--weight-medium); }
.chip__dot { width: 6px; height: 6px; border-radius: var(--r-round); background: var(--grad-accent); flex-shrink: 0; }
.hero__title { margin: 26px 0 20px; font-family: var(--f-display); font-weight: var(--weight-regular); font-size: var(--fs-h1); line-height: 1.2; letter-spacing: var(--tracking-display); }
.h1-line { display: block; }
.grad-text { background: var(--grad-accent); -webkit-background-clip: text; background-clip: text; color: var(--c-clear); padding-right: .12em; }
.lede { margin: 0; max-width: 470px; font-size: var(--fs-lede); line-height: 1.78; color: var(--c-muted); }
.lede strong { color: var(--c-text); }
.platforms { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 14px; margin-top: 34px; }
.platforms__label { font-size: var(--fs-detail); color: var(--c-muted); padding-right: 14px; border-right: 1px solid var(--c-border); line-height: 1; padding-block: 4px; }
.platforms__list { display: flex; flex-wrap: wrap; gap: 2px; list-style: none; }
.platforms__link { display: inline-flex; align-items: center; justify-content: center; gap: 7px; min-height: 32px; padding: 5px 10px; border-radius: var(--r-pill); font-size: var(--fs-control); color: var(--c-muted); }
.platforms__link svg { width: 15px; height: 15px; flex-shrink: 0; }
.platforms__link:hover { background: var(--c-panel); color: var(--c-accent-dark); }
.site-footer { background: var(--c-panel); color: var(--c-text); border-top: 1px solid var(--c-border); padding-top: 60px; padding-bottom: 28px; }
.footer-grid { display: grid; grid-template-columns: 1.25fr .8fr 1.2fr .65fr; gap: 40px; }
.footer-brand p { max-width: 300px; margin-top: 18px; font-size: var(--fs-ui); color: var(--c-muted); }
.footer-title { font-size: var(--fs-ui); font-weight: var(--weight-semibold); margin-bottom: 16px; }
.footer-links { display: grid; gap: 10px; list-style: none; font-size: var(--fs-ui); color: var(--c-muted); }
.footer-links a { display: inline-block; padding-block: 3px; }
.footer-links a:hover { color: var(--c-accent-dark); text-decoration: underline; text-underline-offset: 3px; }
.footer-links a[aria-current="true"] { color: var(--c-accent-dark); }
.footer-bottom { border-top: 1px solid var(--c-border); padding-top: 22px; margin-top: 40px; font-size: var(--fs-sm); color: var(--c-muted); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.reveal { opacity: 1; transform: none; }
.reveal.reveal-ready { opacity: 0; transform: translateY(16px); transition: opacity var(--motion-reveal) var(--ease),transform var(--motion-reveal) var(--ease); }
.reveal.shown { opacity: 1; transform: none; }
@media (max-width: 1360px) {
  .hero__copy { max-width: 480px; }
}
@media (max-width: 1200px) {
  .topbar__inner { gap: 24px; }
  .mainnav { display: none; }
  .menu-toggle { display: inline-flex; }
  .mobile-drawer:not([hidden]) {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 20px var(--gutter) 28px;
    background: var(--c-bg);
    color: var(--c-text);
    border-bottom: 1px solid var(--c-border);
    box-shadow: var(--sh-pop);
    max-height: calc(100dvh - var(--nav-h));
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .mobile-drawer a { display: flex; align-items: center; width: 100%; min-height: 46px; padding: 11px 14px; border-radius: var(--r-ctl); }
  .mobile-drawer a:hover { background: var(--c-panel); color: var(--c-text); }
  .mobile-drawer a[aria-current] { color: var(--c-accent-dark); }
  .mobile-drawer__languages { border-top: 1px solid var(--c-border); margin-top: 12px; padding-top: 12px; }
  .mobile-drawer__label { display: block; padding: 8px 14px; color: var(--c-muted); font-size: var(--fs-xs); }
  .topbar__tools { margin-left: auto; }
  .preview-mobile { display: block; }
  .preview-mobile .mobile-drawer { top: var(--nav-h); }
}
@media (max-width: 1120px) {
  .hero__stage { height: auto; padding-bottom: 56px; }
  .hero__copy { max-width: 600px; }
  .footer-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 860px) {
  :root { --gutter: 20px; --section-space: 60px; }
  .hero__copy { padding-top: 28px; }
  .lede { font-size: var(--fs-body); }
  .card-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 768px) {
  h1,.hero__title { font-size: var(--fs-h1-mobile); }
}
@media (max-width: 640px) {
  :root { --gutter: 20px; }
  .card-grid,.footer-grid { grid-template-columns: minmax(0,1fr); }
  .card,.panel { padding: 22px; }
  .topbar__inner { gap: 10px; }
  .brand { font-size: var(--fs-ui); gap: 7px; }
  .brand__mark { width: 28px; height: 28px; }
  .lang { padding-inline: 10px; }
  .lang__full { display: none; }
  .lang__short { display: inline; }
  .hero .chips { flex-direction: row; flex-wrap: wrap; }
  .platforms { gap: 6px; }
  .platforms__label { width: 100%; border-right: 0; }
  .platforms__link { padding-inline: 8px; min-height: 38px; }
  .tilt,.rig__tilt,[data-tilt] { transform: none; rotate: none; }
  .footer-grid { gap: 28px; }
}
@media (max-width: 360px) {
  :root { --gutter: 16px; }
  .topbar__tools { gap: 4px; }
  .lang > svg:first-child { display: none; }
  .brand { font-size: var(--fs-sm); }
  .btn { padding-inline: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { transition: none !important; animation: none !important; }
  .reveal.reveal-ready { opacity: 1; transform: none; }
}