:root {
  --bg: #FFFFFF;
  --bg-panel: #F4F6FA;
  --bg-panel-2: #EBEEF5;
  --border: #E2E6EE;
  --accent: #2442F2;
  --accent-dark: #0E1B6B;
  --text: #0E1230;
  --text-muted: #5A6078;
  --success: #12A06A;
  --warn: #D98A0B;
  --error: #D9363E;
  --night: #070B2E;
  --sapphire: #1B2C9E;
  --azure: #4A63E6;
  --haze: #C9D2F8;
  --rose-mist: #F4C6DA;
  --rose: #E0569C;
  --dot-soft: #A9B8FF;
  --white-90: rgba(255,255,255,.9);
  --white-78: rgba(255,255,255,.78);
  --white-64: rgba(255,255,255,.64);
  --white-40: rgba(255,255,255,.4);
  --white-28: rgba(255,255,255,.28);
  --white-18: rgba(255,255,255,.18);
  --white-10: rgba(255,255,255,.1);
  --white-06: rgba(255,255,255,.06);
  --haze-glass: rgba(205,215,255,.22);
  --haze-glass-hover: rgba(205,215,255,.32);
  --accent-wash: rgba(36,66,242,.07);
  --accent-wash-2: rgba(36,66,242,.13);
  --accent-ring: rgba(36,66,242,.28);
  --ink-06: rgba(14,18,48,.06);
  --ink-10: rgba(14,18,48,.1);
  --shadow-deep: rgba(14,27,107,.30);
  --shadow-night: rgba(7,11,46,.42);
  --rose-fog: rgba(244,198,218,.5);
  --rose-fog-soft: rgba(244,198,218,.16);
  --clear: transparent;
  --font-display: "Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","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","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold: 600;
  --r-shell: 30px;
  --r-cabin: 32px;
  --r-card: 24px;
  --r-win: 14px;
  --r-sm: 10px;
  --r-xs: 7px;
  --r-check: 4px;
  --r-phone: 34px;
  --r-screen: 27px;
  --r-pill: 999px;
  --r-circle: 50%;
  --gutter: 40px;
  --wrap-width: 1200px;
  --reading-width: 800px;
  --header-width: 1280px;
  --header-height: 64px;
  --card-w: 336px;
  --card-h: 392px;
  --card-gap: 20px;
  --press: 120px;
  --stage-pad: 24px;
  --space-section: 80px;
  --shadow-card: 0 1px 2px var(--ink-06),0 30px 56px -34px var(--shadow-deep);
  --shadow-win: 0 22px 40px -26px var(--shadow-night);
  --shadow-pop: 0 1px 2px var(--ink-06),0 14px 30px -14px var(--shadow-deep);
  --ease: .2s ease;
  --display-size: clamp(34px,2.2vw + 14px,46px);
  --section-size: clamp(26px,1.6vw + 14px,40px);
  --tracking-title: -.02em;
}
*,*::before,*::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; font-family: var(--font-body); color: var(--text); background: var(--bg); line-height: 1.5; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
h1,h2,h3,h4,p,figure,blockquote,pre { margin: 0; }
h1,h2,h3 { font-family: var(--font-display); font-weight: var(--weight-normal); letter-spacing: var(--tracking-title); text-wrap: balance; }
h1,.h1 { font-size: var(--display-size); line-height: 1.15; }
h2,.h2 { font-size: var(--section-size); line-height: 1.2; }
h3 { font-size: 23px; line-height: 1.4; }
a { color: inherit; text-decoration: none; }
button,input,select,textarea { font: inherit; }
button { color: inherit; cursor: pointer; }
button { border: 0; background: var(--clear); }
button:disabled { cursor: not-allowed; }
img,svg { display: block; max-width: 100%; }
img { height: auto; }
svg,.badge-dot { flex-shrink: 0; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: var(--r-xs); }
.stage :focus-visible { outline-color: var(--dot-soft); }
::selection { background: var(--accent-wash-2); color: var(--text); }
.wrap { width: 100%; max-width: calc(var(--wrap-width) + var(--gutter) * 2); margin-inline: auto; padding-inline: var(--gutter); }
.reading { max-width: calc(var(--reading-width) + var(--gutter) * 2); }
.section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.section--panel { background: var(--bg-panel); color: var(--text); }
.panel { padding: 32px; border-radius: var(--r-shell); background: var(--bg-panel); color: var(--text); }
.panel--white { background: var(--bg); color: var(--text); }
.grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 24px; }
.grid > *, .flex > *, .feat-row > *, .footer-grid > * { min-width: 0; }
.stack > * + * { margin-top: 20px; }
.muted { color: var(--text-muted); }
.mono { font-family: var(--font-mono); }
.keep { white-space: nowrap; }
.grad { background: linear-gradient(90deg,var(--accent),var(--rose)); background-clip: text; -webkit-background-clip: text; color: var(--clear); }
code { font-family: var(--font-mono); font-size: .88em; overflow-wrap: anywhere; }
pre { max-width: 100%; min-width: 0; overflow-x: auto; padding: 24px; border-radius: var(--r-win); background: var(--bg-panel); color: var(--text); tab-size: 2; }
pre code { font-size: 13px; white-space: pre; overflow-wrap: normal; word-break: normal; }
.prose,.article-body { min-width: 0; line-height: 1.85; }
.prose :is(h2,h3),.article-body :is(h2,h3) { margin-top: 48px; margin-bottom: 20px; scroll-margin-top: 28px; }
.prose p + p,.article-body p + p { margin-top: 18px; }
.prose :is(ul,ol,pre,blockquote),.article-body :is(ul,ol,pre,blockquote) { margin-block: 24px; }
.prose a,.article-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; overflow-wrap: anywhere; }
.prose li + li,.article-body li + li { margin-top: 8px; }
.prose img,.article-body img { max-width: 100%; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  min-height: 50px; padding: 12px 28px; border-radius: var(--r-pill);
  font-size: 16px; font-weight: var(--weight-medium); line-height: 1.5;
  background: var(--accent); color: var(--bg); text-align: center;
  transition: transform var(--ease),background var(--ease),box-shadow var(--ease);
}
.btn svg { width: 18px; height: 18px; }
.btn:hover,.btn.is-hover { background: var(--accent-dark); color: var(--bg); }
.btn:active,.btn.is-active { transform: translateY(1px); }
.btn:disabled,.btn[aria-disabled="true"] { background: var(--bg-panel-2); color: var(--text-muted); box-shadow: none; pointer-events: none; }
.btn.is-focus { outline: 2px solid var(--accent); outline-offset: 4px; }
.btn--primary { background: var(--bg); color: var(--accent-dark); box-shadow: 0 10px 24px -14px var(--shadow-night); }
.btn--primary:hover { background: var(--bg); color: var(--accent-dark); transform: translateY(-1px); box-shadow: 0 14px 28px -14px var(--shadow-night); }
.btn--glass { background: var(--accent-dark); color: var(--bg); box-shadow: inset 0 0 0 1px var(--white-28); }
.btn--glass:hover { background: var(--night); color: var(--bg); }
.btn--soft { min-height: 46px; padding: 11px 24px; font-size: 15px; background: var(--bg-panel); color: var(--accent-dark); flex: 0 0 auto; }
.btn--soft:hover { background: var(--bg-panel-2); color: var(--accent-dark); }
.actions { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.stage { position: relative; overflow: hidden; background: var(--bg); color: var(--text); padding-bottom: var(--stage-pad); }
.stage::before {
  content: ""; position: absolute; inset: 0 0 calc(var(--press) + var(--stage-pad));
  background:
    radial-gradient(46% 13% at 74% 60%,var(--rose-fog) 0%,var(--rose-fog-soft) 55%,var(--clear) 100%),
    radial-gradient(38% 10% at 86% 86%,var(--rose-fog-soft) 0%,var(--clear) 100%),
    linear-gradient(180deg,var(--night) 0%,var(--sapphire) 36%,var(--azure) 63%,var(--haze) 85%,var(--bg) 100%);
  z-index: 0;
}
.stage > * { position: relative; z-index: 1; }
.hero { padding-top: 18px; text-align: center; overflow-x: clip; }
.intro { max-width: 980px; margin-inline: auto; padding-inline: 24px; display: flex; flex-direction: column; align-items: center; }
.hero .h1 { margin-top: 16px; font-family: var(--font-display); font-weight: var(--weight-normal); letter-spacing: var(--tracking-title); color: var(--bg); }
.h1 .title-line { display: block; }
.lede { margin-top: 14px; font-size: 16px; line-height: 1.65; color: var(--white-78); }
.lede strong { font-weight: var(--weight-medium); color: var(--bg); }
.badge { display: inline-flex; align-items: center; gap: 10px; min-height: 26px; padding: 3px 14px 3px 12px; border-radius: var(--r-pill); font-size: 13px; background: var(--accent-dark); color: var(--bg); box-shadow: inset 0 0 0 1px var(--white-18); }
.badge-dot { width: 7px; height: 7px; border-radius: var(--r-circle); background: var(--dot-soft); }
.facts { margin-top: 16px; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.fact { display: inline-flex; align-items: center; min-height: 30px; padding: 4px 14px; border-radius: var(--r-pill); background: var(--white-06); color: var(--white-90); box-shadow: inset 0 0 0 1px var(--white-18); }
.fact-k { font-size: 12.5px; color: var(--white-78); padding-right: 10px; margin-right: 10px; box-shadow: 1px 0 0 var(--white-18); }
.fact-v { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .01em; }
.platforms { margin-top: 20px; display: flex; align-items: center; justify-content: center; }
.platforms-label { font-size: 13px; color: var(--white-78); padding-right: 18px; margin-right: 18px; box-shadow: 1px 0 0 var(--white-28); line-height: 16px; }
.platforms ul { display: flex; align-items: center; gap: 26px; list-style: none; margin: 0; padding: 0; }
.plat { display: inline-flex; align-items: center; gap: 8px; min-height: 34px; font-size: 14px; color: var(--white-90); }
.plat svg { width: 16px; height: 16px; flex: 0 0 16px; }
.plat:hover { color: var(--bg); text-decoration: underline; text-underline-offset: 5px; }
.topbar,#site-header { position: relative; height: var(--header-height); z-index: 50; background: var(--bg); color: var(--text); }
.stage .topbar,.stage #site-header { background: var(--night); color: var(--bg); }
.topbar-in { height: 100%; max-width: min(100%,calc(var(--header-width) + var(--gutter) * 2)); margin-inline: auto; padding-inline: var(--gutter); display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark { width: 28px; height: 28px; flex: 0 0 28px; }
.brand-name { font-family: var(--font-display); font-size: 17px; font-weight: var(--weight-medium); letter-spacing: -.01em; }
.tabs { margin-left: auto; min-width: 0; }
.tabs ul { display: flex; align-items: center; list-style: none; margin: 0; padding: 0; gap: 30px; height: var(--header-height); }
.tab { position: relative; display: flex; align-items: center; height: var(--header-height); font-size: 15px; white-space: nowrap; color: var(--text-muted); transition: color var(--ease); }
.tab::after { content: ""; position: absolute; left: 0; right: 0; bottom: 12px; height: 2px; border-radius: var(--r-pill); background: var(--accent); opacity: 0; transform: scaleX(.4); transition: opacity var(--ease),transform var(--ease); }
.tab:hover,.tab[aria-current="page"] { color: var(--accent); }
.tab:hover::after { opacity: .4; transform: scaleX(1); }
.tab[aria-current="page"]::after { opacity: 1; transform: scaleX(1); }
.stage .tab { color: var(--white-78); }
.stage .tab:hover,.stage .tab[aria-current="page"] { color: var(--bg); }
.stage .tab::after { background: var(--bg); }
.header-tools { display: flex; align-items: center; gap: 8px; flex-shrink: 0; position: relative; }
.lang { display: inline-flex; align-items: center; gap: 8px; min-height: 36px; padding: 8px 14px 8px 12px; border-radius: var(--r-pill); font-size: 14px; white-space: nowrap; background: var(--bg-panel); color: var(--text); }
.lang svg { width: 16px; height: 16px; }
.lang:hover { background: var(--bg-panel-2); color: var(--text); }
.stage .lang { background: var(--white-06); color: var(--white-90); box-shadow: inset 0 0 0 1px var(--white-18); }
.stage .lang:hover { background: var(--white-10); color: var(--bg); }
.lang-short { display: none; }
.language-menu { position: absolute; top: calc(100% + 12px); right: 0; min-width: 190px; padding: 8px; border-radius: var(--r-win); background: var(--bg); color: var(--text); box-shadow: var(--shadow-pop); z-index: 54; }
.language-menu a { display: flex; align-items: center; min-height: 44px; padding: 10px 14px; border-radius: var(--r-xs); }
.language-menu a:hover,.language-menu a[aria-current] { background: var(--bg-panel); color: var(--accent); }
.menu-toggle { display: none; min-width: 44px; min-height: 44px; padding: 10px; border-radius: var(--r-pill); }
.menu-toggle svg { width: 24px; height: 24px; }
.mobile-nav { position: absolute; inset: var(--header-height) 0 auto; padding: 16px var(--gutter) 24px; background: var(--bg); color: var(--text); max-height: calc(100dvh - var(--header-height)); overflow-y: auto; overscroll-behavior: contain; z-index: 53; box-shadow: var(--shadow-pop); }
.mobile-nav ul { list-style: none; margin: 0; padding: 0; }
.mobile-nav a { display: flex; align-items: center; width: 100%; min-height: 48px; padding: 12px 16px; border-radius: var(--r-xs); }
.mobile-nav a:hover,.mobile-nav a[aria-current] { background: var(--bg-panel); color: var(--accent); }
.mobile-nav p { padding: 16px 16px 8px; color: var(--text-muted); font-size: 13px; }
.menu-veil { position: fixed; inset: var(--header-height) 0 0; background: var(--shadow-night); color: var(--bg); z-index: 49; cursor: pointer; }
html.nav-open { overflow: hidden; }
.feat-head { padding-top: 72px; padding-bottom: 48px; }
.feat-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; }
.feat-lede { margin-top: 12px; max-width: 620px; font-size: 16px; line-height: 1.7; color: var(--text-muted); }
.site-footer { margin-top: 48px; padding-top: 64px; padding-bottom: 32px; background: var(--bg-panel); color: var(--text); }
.footer-grid { display: grid; grid-template-columns: 1.3fr .8fr 1.5fr .8fr; gap: 40px; }
.footer-brand p { max-width: 290px; margin-top: 18px; color: var(--text-muted); font-size: 14px; line-height: 1.8; }
.footer-heading { font-size: 14px; font-weight: var(--weight-medium); margin-bottom: 14px; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links a { display: inline-block; padding-block: 7px; font-size: 14px; color: var(--text-muted); overflow-wrap: anywhere; }
.footer-links a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.footer-hot { display: flex; flex-wrap: wrap; column-gap: 18px; align-content: flex-start; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); color: var(--text-muted); font-size: 13px; }
.footer-legal { display: flex; flex-wrap: wrap; gap: 24px; }
.reveal { opacity: 1; transform: none; }
.reveal.is-waiting { opacity: 0; transform: translateY(14px); transition: opacity .55s ease,transform .55s ease; }
.reveal.shown { opacity: 1; transform: none; }
@media (max-width: 960px) {
  .tabs { display: none; }
  .header-tools { margin-left: auto; }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
}
@media (max-width: 960px) {
  :root { --gutter: 24px; --card-w: 280px; --card-h: 360px; --card-gap: 14px; --space-section: 64px; }
  .topbar-in { padding-inline: 20px; }
  .facts { gap: 8px; }
  .platforms { flex-direction: column; gap: 8px; }
  .platforms-label { box-shadow: none; margin: 0; padding: 0; }
  .platforms ul { gap: 18px; flex-wrap: wrap; justify-content: center; }
  .feat-row { flex-direction: column; align-items: flex-start; gap: 24px; }
  .grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .footer-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 768px) {
  :root { --display-size: clamp(24px,4vw,30px); }
}
@media (max-width: 640px) {
  :root { --gutter: 16px; --space-section: 48px; }
  .wrap { padding-inline: var(--gutter); }
  .grid,.footer-grid { grid-template-columns: minmax(0,1fr); }
  .panel { padding: 24px; }
  .brand-name { font-size: 15px; }
  .brand { gap: 7px; }
  .topbar-in { gap: 8px; padding-inline: var(--gutter); }
  .header-tools { margin-left: auto; gap: 2px; }
  .lang-long { display: none; }
  .lang-short { display: inline; }
  .lang { padding-inline: 10px; gap: 5px; }
  .intro { padding-inline: var(--gutter); }
  .lede { font-size: 15px; }
  .facts { flex-direction: row; flex-wrap: wrap; }
  .fact { padding-inline: 10px; }
  .fact-k,.fact-v { font-size: 11px; }
  .platforms ul { gap: 8px 16px; }
  .plat { font-size: 12px; gap: 5px; }
  .actions { gap: 10px; }
  .actions .btn { padding-inline: 20px; font-size: 15px; }
  .tilt,[data-tilt] { transform: none !important; }
  .footer-grid { gap: 28px; }
  .site-footer { padding-top: 48px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { animation: none !important; transition: none !important; }
  .reveal.is-waiting { opacity: 1; transform: none; }
  .btn:hover { transform: none; }
}