:root{
  color-scheme:light;
  --bg:#F5F9FB;--panel:#FFFFFF;--panel-2:#EAF3EC;--panel-fade:#F2F8F0;--border:#DCE5EA;
  --accent:#46A64A;--accent-2:#3E9A43;--accent-hi:#62BA66;--accent-dark:#2E7E34;--accent-deep:#24662A;
  --slate:#2D4054;--text:#22313F;--muted:#5E6E7C;--faint:#94A3AF;
  --success:#2E9E5B;--warn:#D9931E;--error:#D2453B;
  --leaf-hi1:#DDF2D0;--leaf-hi2:#A6D896;--leaf-ring:#D6EBD8;--glow-core:#F6FCD9;--glow:#D4EC80;
  --glow-a70:rgba(212,236,128,.70);--glow-a0:rgba(212,236,128,0);
  --deep-a28:rgba(36,102,42,.28);--deep-a0:rgba(36,102,42,0);
  --spot-a:rgba(218,240,158,.62);--spot-b:rgba(218,240,158,.22);--spot-0:rgba(218,240,158,0);
  --accent-a05:rgba(70,166,74,.05);--accent-a10:rgba(70,166,74,.10);--accent-a18:rgba(70,166,74,.18);
  --accent-a30:rgba(70,166,74,.30);--accent-a45:rgba(70,166,74,.45);--accent-a55:rgba(70,166,74,.55);
  --slate-a05:rgba(45,64,84,.05);--slate-a12:rgba(45,64,84,.12);--slate-a40:rgba(45,64,84,.40);
  --bg-a0:rgba(245,249,251,0);--panel-a80:rgba(255,255,255,.80);--panel-a88:rgba(255,255,255,.88);
  --white-a14:rgba(255,255,255,.14);--white-a22:rgba(255,255,255,.22);--white-a30:rgba(255,255,255,.30);
  --white-a55:rgba(255,255,255,.55);--white-a85:rgba(255,255,255,.85);
  --flag-red:#D7282F;--flag-blue:#2F4A8C;--flag-white:#FFFFFF;--flag-edge:rgba(45,64,84,.18);
  --transparent:transparent;
  --font-display:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Hiragino Sans","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --r-btn:10px;--r-card:11px;--r-plate:10px;--r-pill:999px;--r-round:50%;
  --gutter:24px;--content-width:1200px;--reading-width:800px;--head-height:64px;--toc-height:64px;
  --fs-body:16px;--fs-small:14px;--fs-caption:13px;--fs-tiny:12px;--fs-label:11px;
  --fs-brand:19px;--fs-lead:19px;--fs-h1:64px;--fs-h2:32px;--fs-h3:22px;
  --fw-normal:400;--fw-medium:500;--fw-strong:600;
  --space-1:8px;--space-2:16px;--space-3:24px;--space-4:32px;--space-5:40px;--space-6:48px;--space-8:64px;--space-12:96px;
  --shadow-panel:inset 0 1px 0 var(--panel),0 2px 8px var(--slate-a05),0 30px 72px -10px var(--accent-a10);
  --shadow-small:inset 0 1px 0 var(--panel),0 12px 26px -8px var(--accent-a30);
  --ease:ease;--fast:.2s;--reveal-duration:.35s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:80px;scroll-behavior:smooth}
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:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
svg{vertical-align:middle}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:var(--accent-dark);text-underline-offset:4px}
button,a,summary{-webkit-tap-highlight-color:var(--accent-a18)}
button{border:0}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
h1,h2,h3{font-family:var(--font-display);font-weight:var(--fw-normal);color:var(--slate);text-wrap:balance}
h1{font-size:clamp(52px,5vw,var(--fs-h1));line-height:1.12;letter-spacing:-.02em;margin:0 0 var(--space-3)}
h2{font-size:var(--fs-h2);line-height:1.3;letter-spacing:-.015em;margin:0 0 var(--space-2)}
h3{font-size:var(--fs-h3);line-height:1.4;margin:0 0 var(--space-1)}
p{margin:0 0 var(--space-2)}
ul,ol{padding-left:var(--space-3)}
code{font-family:var(--font-mono);font-size:.9em;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-plate)}
pre code{overflow-wrap:normal;white-space:pre}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:var(--reading-width);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--space-8);padding-bottom:var(--space-8)}
.stack>*+*{margin-top:var(--space-3)}
.grid{display:grid;gap:var(--space-3)}
.grid>*{min-width:0}
.panel,.card{min-width:0;padding:var(--space-3);border:1px solid var(--border);border-radius:var(--r-card);background:var(--panel);box-shadow:var(--shadow-panel)}
.muted{color:var(--muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.no-break{white-space:nowrap}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.svg-defs{position:absolute;width:0;height:0;overflow:hidden}
.decor-region{position:relative;overflow-x:clip;max-width:100%}
.prose{min-width:0;overflow-wrap:break-word;line-height:1.85}
.prose h2{margin-top:var(--space-8)}
.prose h3{margin-top:var(--space-4)}
.prose li+li{margin-top:var(--space-1)}
.prose img{display:block;margin-inline:auto}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;min-width:156px;padding:10px 28px;border:1px solid var(--transparent);border-radius:var(--r-btn);font-size:var(--fs-body);font-weight:var(--fw-medium);letter-spacing:.02em;text-decoration:none;flex-shrink:0;white-space:nowrap;transition:transform var(--fast) var(--ease),box-shadow var(--fast) var(--ease)}
.btn:hover{transform:translateY(-1px)}
.btn--primary,.btn-primary{color:var(--panel);background:linear-gradient(180deg,var(--accent),var(--accent-2));box-shadow:inset 0 1px 0 var(--white-a30),0 14px 30px -12px var(--accent-a55)}
.btn--primary:hover,.btn-primary:hover{box-shadow:inset 0 1px 0 var(--white-a30),0 18px 36px -12px var(--accent-a55)}
.btn--slate{background:var(--slate);color:var(--panel);box-shadow:inset 0 1px 0 var(--white-a14),0 14px 30px -14px var(--slate-a40)}
.btn--outline{background:var(--panel);border-color:var(--accent);color:var(--accent-dark)}
.btn:active{transform:translateY(0);box-shadow:inset 0 2px 4px var(--slate-a12)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--panel-2);color:var(--muted);box-shadow:none;cursor:not-allowed;transform:none}
.btn svg{width:18px;height:18px;flex-shrink:0}
.cta-row{display:flex;gap:12px;justify-content:center;margin:0 0 20px}
.site-head{position:relative;z-index:40}
.site-head__surface{background:var(--panel-a88);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.site-head__bar{min-height:var(--head-height);display:flex;align-items:center;flex-wrap:nowrap;gap:32px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--slate);font-family:var(--font-display);font-size:var(--fs-brand);font-weight:var(--fw-strong);letter-spacing:-.01em;flex-shrink:0}
.brand__mark{width:30px;height:30px;flex-shrink:0}
.brand__hope{color:var(--accent-dark)}
.desktop-nav{flex:1;min-width:0}
.dotnav{display:flex;align-items:center;list-style:none;margin:0;padding:0;font-size:15px;line-height:1;gap:0}
.dotnav li{display:flex;align-items:center;white-space:nowrap}
.dotnav li+li::before{content:"·";margin:0 10px;color:var(--faint);font-weight:var(--fw-strong)}
.dotnav a{display:inline-flex;align-items:center;min-height:32px;padding:6px 0;color:var(--muted);text-decoration:none;transition:color var(--fast)}
.dotnav a:hover,.dotnav a[aria-current="page"]{color:var(--accent-dark)}
.dotnav a[aria-current="page"]{font-weight:var(--fw-medium)}
.head-actions{margin-left:auto;display:flex;align-items:center;gap:8px;flex-shrink:0}
.nav-login{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:0 20px;border-radius:var(--r-btn);border:1px solid var(--accent);color:var(--accent-dark);background:var(--panel);font-size:var(--fs-small);font-weight:var(--fw-medium);text-decoration:none;white-space:nowrap;box-shadow:0 6px 16px -8px var(--accent-a30)}
.nav-login:hover{background:var(--accent);color:var(--panel)}
.lang-switch{position:relative}
.lang-button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;width:auto;padding:0 4px 0 16px;border:0;border-left:1px solid var(--border);background:var(--transparent);color:var(--muted);font-size:var(--fs-small);white-space:nowrap}
.lang-button svg{width:12px;height:12px;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.8}
.lang-panel{position:absolute;right:0;top:calc(100% + 12px);z-index:60;min-width:180px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-small)}
.lang-panel a{display:flex;align-items:center;min-height:40px;padding:8px 12px;color:var(--slate);text-decoration:none;border-radius:var(--r-btn)}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--panel-2);color:var(--accent-dark)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;background:var(--transparent);color:var(--slate);border:1px solid var(--border);border-radius:var(--r-btn)}
.menu-toggle__line{display:block;width:20px;height:2px;background:currentColor;border-radius:var(--r-pill)}
.mobile-drawer{display:none;position:fixed;top:var(--head-height);right:0;left:0;z-index:42;height:calc(100dvh - var(--head-height));max-height:calc(100dvh - var(--head-height));overflow-y:auto;overscroll-behavior:contain;background:var(--panel);padding:16px var(--gutter) 32px;border-top:1px solid var(--border)}
.mobile-drawer ul{list-style:none;margin:0;padding:0}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;border-bottom:1px solid var(--border);color:var(--slate);text-decoration:none}
.mobile-drawer a[aria-current]{color:var(--accent-dark);background:var(--panel-2)}
.drawer-languages{margin-top:24px;border-top:1px solid var(--border)}
.menu-veil{display:none;position:fixed;inset:var(--head-height) 0 0;z-index:41;background:var(--slate-a40);border:0}
.site-footer{background:linear-gradient(180deg,var(--panel),var(--panel-2));border-top:1px solid var(--border);padding-top:48px;padding-bottom:32px}
.footer-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:40px}
.footer-grid>*{min-width:0}
.footer-intro{max-width:340px;margin-top:16px;color:var(--muted);font-size:var(--fs-small)}
.footer-title{margin:0 0 16px;font-size:var(--fs-body);font-weight:var(--fw-medium)}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 20px;list-style:none;margin:0;padding:0}
.footer-links li{min-width:0}
.footer-links a{display:inline-flex;align-items:center;min-height:28px;color:var(--muted);font-size:var(--fs-small);text-decoration:none}
.footer-links a:hover{color:var(--accent-dark);text-decoration:underline}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 24px;margin-top:32px;padding-top:24px;border-top:1px solid var(--border)}
.footer-languages a{display:inline-flex;align-items:center;min-height:32px;font-size:var(--fs-small);color:var(--muted)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:24px;color:var(--muted);font-size:var(--fs-caption)}
.footer-bottom p{margin:0}
.reveal{transition:opacity var(--reveal-duration) var(--ease),transform var(--reveal-duration) var(--ease)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-width:0;width:100%;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:32px}
#server-status>*{min-width:0;max-width:100%}
#server-status+*{margin-top:32px}
@media(max-width:1180px){
  .site-head__bar{gap:20px}
  .dotnav{font-size:var(--fs-small)}
  .dotnav li+li::before{margin-inline:7px}
  .lang-button{padding-left:10px}
}
@media(max-width:1080px){
  .desktop-nav{display:none}
  .head-actions{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .mobile-drawer.is-open,.menu-veil.is-open{display:block}
  .site-head__surface{position:relative;z-index:43}
}
@media(max-width:768px){
  :root{--fs-h1:36px;--fs-h2:28px;--fs-lead:17px}
  h1{font-size:var(--fs-h1);line-height:1.16}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .section{padding-top:48px;padding-bottom:48px}
}
@media(max-width:640px){
  :root{--gutter:16px;--fs-h2:26px}
  .no-break{white-space:normal}
  .wrap,.reading-wrap{padding-inline:var(--gutter)}
  .site-head__bar{gap:8px}
  .brand{gap:6px;font-size:16px}
  .brand__mark{width:26px;height:26px}
  .head-actions{gap:4px;margin-left:auto}
  .nav-login{padding-inline:10px;font-size:var(--fs-caption)}
  .lang-button{padding-inline:7px 3px;font-size:var(--fs-tiny);min-height:36px}
  .lang-button svg{width:10px;height:10px}
  .cta-row{flex-direction:column;width:100%;max-width:320px}
  .cta-row .btn{width:100%}
  .tilt,.chip-float{transform:none}
  .decor-region{max-width:100%;overflow-x:clip}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
  .btn,.dotnav a{transition:none}
  .btn:hover{transform:none}
}