:root{
  --bg:#E6EDF3;--bg-top:#EEF3F7;--bg-bottom:#DFE8EF;
  --panel:#F7FAFC;--panel-2:#D8E3EC;--border:#C6D3DE;--line-soft:rgba(198,211,222,.72);
  --accent:#1F5240;--accent-dark:#133829;--accent-2:#2B6A55;--slate:#5C7A83;--fog:#C2D3E0;
  --apricot:#F7DFC6;--apricot-deep:#EFC9A2;--apricot-line:#E9C49F;--cream:#FBF4EC;
  --text:#16262A;--muted:#52646B;--success:#2E8A5C;--warn:#B9761C;--error:#BE3F37;
  --white:#FFFFFF;--on-deep:#F7FAFC;--on-deep-muted:rgba(247,250,252,.74);
  --flag-red:#C8283A;--flag-blue:#1F3F7A;--flag-white:#FFFFFF;--flag-ring:rgba(22,38,42,.14);
  --glow-green:rgba(31,82,64,.06);--glow-apricot:rgba(233,168,108,.10);
  --shade-06:rgba(31,82,64,.06);--shade-10:rgba(31,82,64,.10);--shade-12:rgba(31,82,64,.12);--shade-14:rgba(31,82,64,.14);
  --tint-07:rgba(31,82,64,.07);--tint-10:rgba(31,82,64,.10);--tint-12:rgba(31,82,64,.12);--ok-ring:rgba(46,138,92,.16);
  --hi:rgba(255,255,255,.88);--hi-dim:rgba(255,255,255,.2);--hi-edge:rgba(255,255,255,.5);--sheen:rgba(255,255,255,.2);
  --glass:rgba(247,250,252,.8);--groove:rgba(216,227,236,.72);--veil:rgba(22,38,42,.28);
  --sky-deep-far:rgba(255,255,255,.07);--sky-deep-near:rgba(19,56,41,.6);--sky-deep-mark:rgba(19,56,41,.76);
  --sky-deep-water:rgba(255,255,255,.07);--sky-deep-lit:rgba(247,223,198,.6);--sky-deep-ring:rgba(247,223,198,.34);
  --sky-light-far:rgba(31,82,64,.07);--sky-light-near:rgba(31,82,64,.14);--sky-light-mark:rgba(31,82,64,.3);
  --sky-light-water:rgba(255,255,255,.46);--sky-sun:rgba(255,255,255,.62);--sky-snow:rgba(255,255,255,.78);
  --font-display:Georgia,"Iowan Old Style","Times New Roman","Songti SC","STSongti-SC-Regular","Noto Serif CJK SC","Source Han Serif SC","Noto Serif JP","Hiragino Mincho ProN","Nanum Myeongjo",serif;
  --font-body:Inter,"Noto Sans SC","PingFang SC","Hiragino Sans","Hiragino Kaku Gothic ProN","Apple SD Gothic Neo","Malgun Gothic","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --r-card:10px;--r-tag:12px;--r-pill:999px;--r-small:8px;--r-logo:9px;--r-flag:4px;--r-round:50%;
  --body-size:17px;--body-leading:1.75;--display-weight:400;--display-tracking:-.02em;
  --gutter:24px;--wrap-max:1200px;--nav-h:72px;--toc-h:64px;--anchor-gap:16px;
  --hero-h:clamp(720px,calc(100svh - var(--nav-h)),900px);
  --space-1:8px;--space-2:16px;--space-3:24px;--space-4:32px;--space-5:40px;--space-6:48px;--space-8:64px;--space-12:96px;
  --ease-ui:cubic-bezier(.2,.65,.3,1);--duration-ui:.2s;
  --shadow-panel:inset 0 1px 0 var(--hi),0 16px 32px -12px var(--shade-12);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + var(--anchor-gap))}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--body-size);line-height:var(--body-leading);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{vertical-align:middle}
img{max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:inherit;text-underline-offset:.2em}
button,a,summary{touch-action:manipulation}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
[hidden]{display:none!important}
h1,h2,h3,h4,p,blockquote{margin:0}
h1,h2,h3{font-family:var(--font-display);font-weight:var(--display-weight);letter-spacing:var(--display-tracking);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,5vw,72px);line-height:1.12}
h2{font-size:clamp(30px,3.2vw,44px);line-height:1.22}
h3{font-size:28px;line-height:1.3}
p{overflow-wrap:break-word}
ul,ol{padding-left:1.5em}
li+li{margin-top:var(--space-1)}
nav ul,.nav-list,.marks-list,.trust{list-style:none;margin:0;padding:0}
nav li+li,.marks-list li+li,.trust li+li{margin-top:0}
code{font-family:var(--font-mono);font-size:.88em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:var(--space-3);background:var(--panel-2);border:1px solid var(--border);border-radius:var(--r-card)}
pre code{white-space:pre;overflow-wrap:normal}
table{border-collapse:collapse}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:var(--wrap-max);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--space-12);padding-bottom:var(--space-12)}
.section-head{max-width:760px;margin-bottom:var(--space-5)}
.section-head p{margin-top:var(--space-2);color:var(--muted)}
.stack>*+*{margin-top:var(--space-3)}
.grid{display:grid;gap:var(--space-3)}
.grid>*{min-width:0}
.grid--three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--two{grid-template-columns:repeat(2,minmax(0,1fr))}
.panel,.card{min-width:0;background:var(--panel);border:1px solid var(--line-soft);border-radius:var(--r-card);box-shadow:var(--shadow-panel);padding:var(--space-4)}
.muted{color:var(--muted)}
.accent{color:var(--accent)}
.mono{font-family:var(--font-mono)}
.prose{max-width:800px;min-width:0}
.prose p,.prose ul,.prose ol{margin-top:var(--space-3)}
.prose h2{margin-top:var(--space-8)}
.prose h3{margin-top:var(--space-5)}
.prose section{padding-top:var(--space-3);padding-bottom:var(--space-3)}
.prose a{color:var(--accent)}
.prose blockquote{margin-top:var(--space-3)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.ic{fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.ic--bold{stroke-width:1.9}
.ic-fill{fill:currentColor}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:12px 30px;border:0;border-radius:var(--r-pill);font-size:16px;font-weight:500;line-height:1.2;text-decoration:none;flex-shrink:0;white-space:nowrap;transition:transform var(--duration-ui),box-shadow var(--duration-ui),background-color var(--duration-ui)}
.btn svg{width:18px;height:18px;flex-shrink:0}
.btn--solid,.btn-primary{color:var(--on-deep);background:linear-gradient(180deg,var(--accent-2),var(--accent));box-shadow:inset 0 1px 0 var(--hi-dim),0 12px 26px -6px var(--shade-14)}
.btn--solid:hover,.btn-primary:hover{transform:translateY(-1px);box-shadow:inset 0 1px 0 var(--hi-dim),0 16px 30px -6px var(--shade-14)}
.btn--ghost,.btn-secondary{color:var(--text);border:1.5px solid var(--text);background:transparent}
.btn--ghost:hover,.btn-secondary:hover{background:var(--panel)}
.btn:active{transform:translateY(1px)}
.btn--small{min-height:40px;padding:10px 20px;font-size:14px}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}
.text-link{display:inline-flex;align-items:center;gap:var(--space-1);min-height:32px;color:var(--accent)}
.topbar{position:sticky;top:0;z-index:40;height:var(--nav-h);background:var(--glass);-webkit-backdrop-filter:blur(14px) saturate(1.2);backdrop-filter:blur(14px) saturate(1.2);border-bottom:1px solid var(--line-soft)}
.topbar-inner{position:relative;width:min(1360px,calc(100% - 48px));height:100%;margin-inline:auto;display:flex;align-items:center;gap:32px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);flex-shrink:0}
.brand-logo{width:34px;height:34px;border-radius:var(--r-logo);box-shadow:0 6px 14px var(--shade-14)}
.brand-word{font-size:19px;font-weight:650;letter-spacing:.03em;line-height:1}
.nav-list{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.nav-list a,.nav-more>button,.nav-more>summary{position:relative;display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 14px;border:0;border-radius:var(--r-pill);background:none;font-size:15.5px;line-height:1;color:var(--text);text-decoration:none;cursor:pointer;transition:background-color var(--duration-ui)}
.nav-list a:hover,.nav-more>button:hover,.nav-more>summary:hover{background:var(--tint-07)}
.nav-list a[aria-current="page"],.nav-more>button.is-current{color:var(--accent);font-weight:600}
.nav-list a[aria-current="page"]::after{content:"";position:absolute;left:50%;bottom:3px;width:4px;height:4px;margin-left:-2px;border-radius:var(--r-round);background:var(--accent)}
.caret{font-size:11px;color:var(--muted)}
.nav-more{position:relative}
.nav-more summary{list-style:none}
.nav-more summary::-webkit-details-marker{display:none}
.nav-menu{position:absolute;top:calc(100% + 10px);left:-6px;min-width:184px;padding:10px;background:var(--panel);border:1px solid var(--line-soft);border-radius:var(--r-card);box-shadow:inset 0 1px 0 var(--hi),0 22px 40px -12px var(--shade-14)}
.nav-group{padding:6px 10px 2px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--muted);line-height:1.6}
.nav-menu a{display:flex;min-height:40px;padding:8px 10px;border-radius:var(--r-small);font-size:15px;text-decoration:none}
.nav-menu a:hover{background:var(--tint-07)}
.topbar-end{margin-left:auto;display:flex;align-items:center;gap:12px}
.lang-control{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;min-width:44px;width:auto;padding:0 12px;border:0;border-radius:var(--r-pill);background:none;font-size:14.5px;color:var(--text);cursor:pointer;white-space:nowrap}
.lang span{white-space:nowrap}
.lang:hover{background:var(--tint-07)}
.lang svg{width:17px;height:17px;flex-shrink:0;color:var(--muted)}
.language-menu{left:auto;right:0;min-width:170px}
.login{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 24px;border:1.5px solid var(--text);border-radius:var(--r-pill);font-size:15px;font-weight:500;text-decoration:none;color:var(--text);white-space:nowrap;transition:background-color var(--duration-ui),color var(--duration-ui)}
.login:hover{background:var(--text);color:var(--panel)}
.hamburger{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:0;border-radius:var(--r-small);background:var(--tint-07)}
.hamburger svg{width:20px;height:20px}
.mobile-nav{position:absolute;z-index:2;left:0;right:0;top:var(--nav-h);padding:var(--space-2);background:var(--panel);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:0 22px 40px -12px var(--shade-14);max-height:calc(100dvh - var(--nav-h) - 16px);overflow-y:auto;overscroll-behavior:contain}
.mobile-nav a{display:flex;align-items:center;width:100%;min-height:44px;padding:10px 16px;text-decoration:none;border-radius:var(--r-small)}
.mobile-nav a:hover,.mobile-nav a[aria-current]{background:var(--tint-07);color:var(--accent)}
.drawer-languages{margin-top:var(--space-2);padding-top:var(--space-2);border-top:1px solid var(--border)}
.nav-veil{position:fixed;inset:var(--nav-h) 0 0;z-index:0;border:0;background:var(--veil)}
html.nav-open{overflow:hidden}
.site-footer{background:var(--panel-2);border-top:1px solid var(--border);padding-top:var(--space-8);padding-bottom:var(--space-4)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:var(--space-6)}
.footer-grid>*{min-width:0}
.footer-brand p{margin-top:var(--space-2);max-width:380px;color:var(--muted);font-size:15px}
.footer-heading{font-family:var(--font-body);font-weight:600;font-size:15px;letter-spacing:0;margin-bottom:var(--space-2)}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 16px;list-style:none;padding:0;margin:0}
.footer-links li{margin:0;min-width:0}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:32px;text-decoration:none;font-size:14px}
.footer-links a:hover,.footer-legal a:hover{text-decoration:underline;color:var(--accent)}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:var(--space-5)}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--space-2);margin-top:var(--space-4);padding-top:var(--space-3);border-top:1px solid var(--border);font-size:13px;color:var(--muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:var(--space-3)}
.reveal{transition:opacity .6s var(--ease-ui),transform .6s var(--ease-ui)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.decorated,.hero,.stripe-halo-host{position:relative;overflow-x:clip;max-width:100%}
#server-status{position:relative;display:block;min-width:0;width:100%;max-width:100%;overflow:hidden;margin-top:var(--space-4);margin-bottom:var(--space-4)}
#server-status>*{max-width:100%;min-width:0}
#server-status+*{margin-top:var(--space-4)}
.counter-number,[data-count]{display:inline-block;min-width:3ch;font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:right}
@media(max-width:1100px){
  .desktop-nav{display:none}
  .hamburger{display:inline-flex}
  .topbar-end{margin-left:auto}
  .footer-grid{grid-template-columns:1.2fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:768px){
  h1{font-size:clamp(28px,7vw,40px)}
  h2{font-size:32px}
  h3{font-size:25px}
  .section{padding-top:var(--space-8);padding-bottom:var(--space-8)}
  .grid--three,.grid--two{grid-template-columns:minmax(0,1fr)}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .topbar-inner{width:calc(100% - 32px);gap:8px}
  .topbar-end{gap:4px;margin-left:auto}
  .brand-word{font-size:17px}
  .brand{gap:7px}
  .brand-logo{width:30px;height:30px}
  .login{padding:0 14px;min-height:44px;font-size:14px}
  .lang{padding:0 8px}
  .lang-label{display:none}
  .panel,.card{padding:var(--space-3)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:var(--space-4)}
  .footer-brand{grid-column:auto}
  .tilt,.tilt-card,[data-tilt]{transform:none}
  .decorated,.stripe-halo-host{max-width:100%;overflow-x:clip}
  .btn{padding-inline:24px;max-width:100%}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none}
}