:root {
  --c-bg:#F9F9F8;
  --c-panel:#FFFFFF;
  --c-panel-2:#F0EFEC;
  --c-border:#E4E2DE;
  --c-accent:#A3341F;
  --c-accent-dark:#7C2614;
  --c-text:#1E2128;
  --c-text-hover:#2C3039;
  --c-muted:#5D626C;
  --c-faint:#6E727A;
  --c-success:#1F8A5B;
  --c-warn:#C98A12;
  --c-error:#B42318;
  --c-link:#2D5BB9;
  --c-notice:#EEF4FD;
  --c-notice-edge:#DCE6F6;
  --c-hero-top:#FFFFFF;
  --c-hero-bottom:#F2F1EE;
  --c-on-accent:#FFFFFF;
  --c-transparent:transparent;
  --c-accent-a04:rgba(163,52,31,.04);
  --c-accent-a10:rgba(163,52,31,.10);
  --c-accent-a12:rgba(163,52,31,.12);
  --c-success-a18:rgba(31,138,91,.18);
  --c-ink-a06:rgba(30,33,40,.06);
  --c-ink-a14:rgba(30,33,40,.14);
  --c-veil:rgba(30,33,40,.38);
  --c-white-a12:rgba(255,255,255,.12);
  --c-white-a16:rgba(255,255,255,.16);
  --c-white-a20:rgba(255,255,255,.20);
  --c-white-a38:rgba(255,255,255,.38);
  --c-white-a55:rgba(255,255,255,.55);
  --c-white-a70:rgba(255,255,255,.70);
  --c-white-a80:rgba(255,255,255,.80);
  --c-white-a92:rgba(255,255,255,.92);
  --c-glass:rgba(255,255,255,.14);
  --c-glass-edge:rgba(255,255,255,.38);
  --c-glass-deep:rgba(64,12,4,.42);
  --flag-red:#BF2E36;
  --flag-blue:#263B78;
  --flag-white:#FFFFFF;
  --f-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Microsoft YaHei",system-ui,sans-serif;
  --f-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --fs-body:16px;
  --fs-small:14px;
  --fs-caption:12px;
  --fs-h1:clamp(52px,5vw,64px);
  --fs-h2:clamp(28px,3vw,40px);
  --fs-h3:22px;
  --fs-hero:64px;
  --fs-hero-mobile:36px;
  --weight-normal:400;
  --weight-medium:500;
  --weight-strong:600;
  --r-chip:6px;
  --r-nav:8px;
  --r-btn:10px;
  --r-tile:12px;
  --r-float:14px;
  --r-card:18px;
  --r-panel:28px;
  --r-pill:999px;
  --r-circle:50%;
  --gutter:24px;
  --wrap-width:1240px;
  --head-height:60px;
  --drawer-top:98px;
  --anchor-offset:80px;
  --toc-offset:88px;
  --section-space:80px;
  --transition-fast:.2s;
  --transition-reveal:.35s;
  --shadow-float:0 2px 6px var(--c-ink-a06),0 20px 44px -14px var(--c-accent-a10);
  --shadow-card:0 1px 0 var(--c-white-a80) inset,0 14px 36px -22px var(--c-accent-a10);
  --shadow-panel:inset 0 1px 0 var(--c-white-a20),0 18px 40px -22px var(--c-accent-a12),0 48px 96px -36px var(--c-accent-a12);
  --shadow-glass:inset 0 1px 0 var(--c-white-a38),0 34px 44px -18px var(--c-glass-deep);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
body{margin:0;background:var(--c-bg);color:var(--c-text);font-family:var(--f-body);font-size:var(--fs-body);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
h1,h2,h3,h4{font-family:var(--f-display);font-weight:var(--weight-normal);text-wrap:balance}
h1{font-size:var(--fs-h1);line-height:1.1;letter-spacing:-.02em}
h2{font-size:var(--fs-h2);line-height:1.25;letter-spacing:-.02em}
h3{font-size:var(--fs-h3);line-height:1.4}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
img{display:block;max-width:100%;height:auto}
svg{flex-shrink:0}
ul,ol{margin:0;padding:0;list-style:none}
button{border:0}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--c-link);outline-offset:2px}
::selection{background:var(--c-notice-edge);color:var(--c-text)}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:var(--wrap-width);margin-inline:auto;padding-inline:var(--gutter)}
.sec{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.section-head{margin-bottom:32px}
.section-head p{margin-top:16px;max-width:760px;color:var(--c-muted)}
.grid{display:grid;gap:24px}
.grid--three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--five{grid-template-columns:repeat(5,minmax(0,1fr))}
.grid>*{min-width:0}
.panel,.card{min-width:0;background:var(--c-panel);border:1px solid var(--c-border);box-shadow:var(--shadow-card)}
.panel{padding:32px;border-radius:var(--r-panel)}
.card{padding:24px;border-radius:var(--r-card)}
.muted{color:var(--c-muted)}
.mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
.text-link,.prose a:not(.btn){color:var(--c-link);text-decoration:underline;text-underline-offset:3px}
.prose{min-width:0;overflow-wrap:break-word}
.prose p,.prose ul,.prose ol,.prose pre,.prose blockquote,.prose table{margin-block:20px}
.prose h2{margin-top:48px;margin-bottom:20px}
.prose h3{margin-top:32px;margin-bottom:16px}
.prose ul{list-style:disc;padding-left:24px}
.prose ol{list-style:decimal;padding-left:24px}
.prose li+li{margin-top:8px}
code{font-family:var(--f-mono);font-size:.9em;overflow-wrap:anywhere;word-break:break-word}
pre{max-width:100%;min-width:0;overflow-x:auto;padding:20px;border:1px solid var(--c-border);border-radius:var(--r-tile);background:var(--c-panel-2)}
pre code{white-space:pre;overflow-wrap:normal;word-break:normal}
.decor-section{position:relative;overflow-x:clip}
.decor-halo{position:absolute;inset:0 0 30% 40%;max-width:100%;pointer-events:none;background:radial-gradient(closest-side,var(--c-accent-a04),var(--c-transparent))}
#server-status{position:relative;display:block;min-width:0;max-width:100%;min-height:64px;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:24px}
#server-status>*{min-width:0;max-width:100%}
.reveal{transition:opacity var(--transition-reveal) ease,transform var(--transition-reveal) ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.btn{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;min-width:140px;min-height:44px;padding:10px 28px;border:1px solid var(--c-transparent);border-radius:var(--r-btn);font-size:15px;font-weight:var(--weight-medium);letter-spacing:.01em;line-height:22px;white-space:nowrap;transition:background-color var(--transition-fast) ease,box-shadow var(--transition-fast) ease,transform var(--transition-fast) ease}
.btn--solid,.btn-primary{background:var(--c-text);color:var(--c-on-accent);box-shadow:0 1px 0 var(--c-ink-a14),0 12px 26px -12px var(--c-accent-a12)}
.btn--solid:hover,.btn-primary:hover{background:var(--c-text-hover);transform:translateY(-1px)}
.btn--line,.btn-secondary{background:var(--c-panel);color:var(--c-text);border-color:var(--c-text)}
.btn--line:hover,.btn-secondary:hover{background:var(--c-panel-2)}
.btn:active{transform:none}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--c-panel-2);color:var(--c-muted);border-color:var(--c-border);box-shadow:none;transform:none;pointer-events:none}
.notice{background:var(--c-notice);border-bottom:1px solid var(--c-notice-edge)}
.notice-text{max-width:1280px;min-height:34px;margin:0 auto;padding:7px 24px;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:4px 10px;font-size:13.5px;line-height:20px;color:var(--c-text)}
.notice-link{display:inline-flex;align-items:center;gap:4px;min-height:24px;color:var(--c-link);font-weight:var(--weight-medium)}
.notice-link:hover{text-decoration:underline;text-underline-offset:3px}
.notice-arrow{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.site-head{position:relative;z-index:30;background:var(--c-panel);border-bottom:1px solid var(--c-border)}
.head-inner{max-width:1280px;height:var(--head-height);margin:0 auto;padding:0 24px;display:flex;align-items:center;flex-wrap:nowrap;gap:28px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;min-height:30px}
.brand-mark{width:30px;height:30px}
.brand-word{font-family:var(--f-display);font-size:19px;font-weight:var(--weight-strong);letter-spacing:-.02em;color:var(--c-text)}
.primary-nav{flex:1;min-width:0}
.nav-list{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.nav-list>li{flex-shrink:0}
.nav-more{position:relative}
.nav-more-toggle{cursor:pointer;border:0;background:var(--c-transparent)}
.nav-more-toggle::after{content:'▾';font-size:10px}
.nav-more-panel{position:absolute;top:calc(100% + 8px);right:0;z-index:80;list-style:none;margin:0;padding:8px;min-width:220px;border:1px solid var(--c-border);border-radius:var(--r-tile);background:var(--c-panel);box-shadow:var(--shadow-float)}
.nav-more-panel .nav-link{display:flex;width:100%;height:auto;min-height:40px;white-space:normal;padding:8px 10px}
.nav-link{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 10px;border-radius:var(--r-nav);font-size:14px;color:var(--c-muted);white-space:nowrap;transition:background-color var(--transition-fast) ease,color var(--transition-fast) ease}
.nav-link:hover,.nav-link.is-active{color:var(--c-text);background:var(--c-panel-2)}
.nav-ico,.tool-ico{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.head-tools{display:flex;align-items:center;gap:10px;margin-left:auto;flex-shrink:0}
.lang-box{position:relative}
.lang-switch{display:inline-flex;align-items:center;justify-content:center;gap:6px;width:auto;min-width:44px;height:36px;padding:0 10px;border:0;border-radius:var(--r-nav);background:var(--c-transparent);font-size:14px;color:var(--c-muted);cursor:pointer}
.lang-switch span{white-space:nowrap}
.lang-switch:hover{background:var(--c-panel-2);color:var(--c-text)}
.lang-panel{position:absolute;right:0;top:calc(100% + 8px);z-index:80;min-width:180px;padding:8px;border:1px solid var(--c-border);border-radius:var(--r-tile);background:var(--c-panel);box-shadow:var(--shadow-float)}
.lang-panel a{display:flex;align-items:center;min-height:40px;padding:8px 12px;border-radius:var(--r-nav)}
.lang-panel a:hover,.lang-panel a[aria-current]{background:var(--c-panel-2)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:0 18px;border:1px solid var(--c-text);border-radius:var(--r-btn);background:var(--c-panel);font-size:14px;font-weight:var(--weight-medium);white-space:nowrap}
.btn-login:hover{background:var(--c-panel-2)}
.menu-btn{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:1px solid var(--c-border);border-radius:var(--r-btn);background:var(--c-panel)}
.menu-icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.mobile-drawer{position:fixed;top:var(--drawer-top);right:0;left:0;z-index:60;height:calc(100dvh - var(--drawer-top));max-height:calc(100dvh - var(--drawer-top));overflow-y:auto;overscroll-behavior:contain;background:var(--c-panel);padding:16px var(--gutter) 32px;border-top:1px solid var(--c-border)}
.mobile-drawer a{display:flex;align-items:center;gap:12px;width:100%;min-height:46px;padding:11px 12px;border-radius:var(--r-nav)}
.mobile-drawer a:hover,.mobile-drawer a[aria-current="page"]{background:var(--c-panel-2)}
.drawer-languages{margin-top:16px;padding-top:16px;border-top:1px solid var(--c-border)}
.nav-veil{position:fixed;inset:var(--drawer-top) 0 0;z-index:20;background:var(--c-veil)}
html.nav-open{overflow:hidden}
.site-footer{border-top:1px solid var(--c-border);background:var(--c-panel)}
.footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:48px;padding-top:48px;padding-bottom:40px}
.footer-grid>*{min-width:0}
.footer-brand p{max-width:320px;margin-top:16px;font-size:14px;color:var(--c-muted)}
.footer-title{font-size:14px;font-weight:var(--weight-medium);margin-bottom:12px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 16px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;font-size:14px;color:var(--c-muted);overflow-wrap:anywhere}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{color:var(--c-text);text-decoration:underline;text-underline-offset:3px}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;padding-top:20px;padding-bottom:20px;border-top:1px solid var(--c-border)}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding-top:20px;padding-bottom:28px;border-top:1px solid var(--c-border);font-size:13px;color:var(--c-muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:16px}
@media(min-width:1061px){.mobile-drawer,.nav-veil{display:none!important}}
@media(max-width:1240px){.head-inner{gap:18px}.nav-link{padding-inline:7px}.head-tools{gap:6px}}
@media(max-width:1120px){.head-inner{gap:12px}.nav-link{font-size:13px;gap:4px;padding-inline:6px}.lang-switch{padding-inline:6px}}
@media(max-width:1060px){.primary-nav{display:none}.menu-btn{display:inline-flex}.head-tools{margin-left:auto}}
@media(max-width:960px){.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}}
@media(max-width:768px){
  :root{--fs-h1:36px;--section-space:48px}
  .grid--three{grid-template-columns:1fr}
  .grid--five{grid-template-columns:repeat(2,minmax(0,1fr))}
  .head-tools{margin-left:auto}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .wrap{padding-inline:var(--gutter)}
  .head-inner{padding-inline:16px;gap:8px}
  .head-tools{margin-left:auto;gap:6px}
  .brand{gap:6px}
  .brand-word{font-size:17px}
  .brand-mark{width:26px;height:26px}
  .btn-login{padding-inline:12px}
  .lang-switch{padding-inline:6px;font-size:12px}
  .lang-switch .tool-ico{display:none}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-brand{grid-column:auto}
  .panel{padding:22px}
  .tilt,[data-tilt]{transform:none}
  .decor-halo,.decor-section{max-width:100%}
}
@media(max-width:359px){
  .head-inner{padding-inline:16px;gap:4px}
  .head-tools{gap:4px}
  .brand-word{font-size:15px}
  .brand-mark{width:24px;height:24px}
  .btn-login{padding-inline:9px;font-size:13px}
  .lang-switch{padding-inline:4px;font-size:11px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:0s!important;animation-duration:0s!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}