:root{
  --bg:#F7EFE2;
  --bg-panel:#FFFAF2;
  --bg-panel-2:#EFE3CF;
  --border:#E2D3BA;
  --border-soft:rgba(226,211,186,.72);
  --accent:#0A98A0;
  --accent-dark:#076F75;
  --accent-soft:#CDE7E5;
  --accent-soft-hi:#E6F3F1;
  --accent-soft-lo:#AFD4D1;
  --apricot:#EBB48E;
  --apricot-tape:rgba(235,180,142,.5);
  --text:#2B2118;
  --text-muted:#6E5F4E;
  --success:#2F8F4E;
  --success-soft:rgba(47,143,78,.18);
  --warn:#C98A12;
  --error:#C2412D;
  --hero-top:#FBF5EA;
  --hero-bottom:#F1E6D3;
  --glow-apricot:rgba(235,180,142,.16);
  --dusk-top:#F5DCBD;
  --dusk-mid:#EBB48E;
  --dusk-sea:#CFDFD9;
  --sky-high:#F9E8D2;
  --sky-low:#F0C29C;
  --sea-deep:#B8CEC9;
  --sun-core:rgba(255,243,226,.95);
  --sun-glow:rgba(247,206,168,.55);
  --horizon:rgba(255,244,228,.95);
  --cloud:rgba(255,248,238,.92);
  --cloud-soft:rgba(255,244,230,.6);
  --cloud-sea:rgba(236,243,239,.75);
  --frame-hi:#FFF6E8;
  --frame-lo:#E6D4B8;
  --frame-groove:#D6C2A3;
  --hi-line:rgba(255,255,255,.78);
  --glare:rgba(255,255,255,.66);
  --sheen:rgba(255,255,255,.3);
  --ink-04:rgba(43,33,24,.04);
  --ink-06:rgba(43,33,24,.06);
  --ink-08:rgba(43,33,24,.08);
  --ink-12:rgba(43,33,24,.12);
  --ink-20:rgba(43,33,24,.20);
  --veil:rgba(43,33,24,.38);
  --teal-10:rgba(10,152,160,.10);
  --teal-14:rgba(10,152,160,.14);
  --flag-red:#D52B1E;
  --flag-white:#FFFFFF;
  --flag-navy:#3C3B6E;
  --flag-blue:#21468B;
  --clear:transparent;
  --shadow-card:0 1px 2px var(--ink-06),0 16px 34px -12px var(--ink-08),0 26px 52px -20px var(--teal-10);
  --shadow-panel:0 2px 6px var(--ink-04),0 30px 64px -18px var(--ink-08),0 44px 96px -30px var(--teal-10);
  --shadow-field:0 1px 2px var(--ink-06),0 12px 28px -14px var(--ink-08),0 18px 36px -22px var(--teal-10);
  --shadow-shell:0 30px 70px -44px var(--ink-12);
  --r-shell:32px;
  --r-panel:28px;
  --r-card:16px;
  --r-ctl:14px;
  --r-btn:10px;
  --r-small:2px;
  --r-mobile:24px;
  --r-circle:50%;
  --r-pill:999px;
  --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;
  --weight-body:400;
  --weight-medium:500;
  --weight-semibold:600;
  --weight-bold:700;
  --weight-display:800;
  --size-body:16px;
  --size-small:14px;
  --size-h1:clamp(52px,4.45vw,64px);
  --size-h2:clamp(28px,3vw,40px);
  --size-h3:24px;
  --tracking-display:-.02em;
  --gutter:24px;
  --content-width:1328px;
  --reading-width:840px;
  --anchor-offset:88px;
  --toc-offset:16px;
  --toc-clearance:104px;
  --space-section:80px;
  --duration-fast:.2s;
  --duration-reveal:.65s;
  --grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.17 0 0 0 0 0.13 0 0 0 0 0.09 0 0 0 1.4 -0.2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23g)'/%3E%3C/svg%3E");
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);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(--size-body);font-weight:var(--weight-body);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:60;background-image:var(--grain);background-size:160px 160px;opacity:.03;mix-blend-mode:multiply}
img,video{display:block;max-width:100%;height:auto}
svg{flex-shrink:0;vertical-align:middle}
button,input,select,textarea{font:inherit}
button,a,input,summary{-webkit-tap-highlight-color:var(--teal-10)}
button{cursor:pointer}
a{color:inherit;text-underline-offset:4px}
button:disabled{cursor:not-allowed}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:var(--size-h1);font-weight:var(--weight-display);line-height:1.1;letter-spacing:var(--tracking-display)}
h2{font-size:var(--size-h2);font-weight:var(--weight-display);line-height:1.2;letter-spacing:var(--tracking-display)}
h3{font-size:var(--size-h3);line-height:1.35;font-weight:var(--weight-bold)}
p{margin-block:0 20px}
p:last-child{margin-bottom:0}
code{font-family:var(--font-mono);font-size:.88em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:24px;border:1px solid var(--border);border-radius:var(--r-card);background:var(--bg-panel-2);font-family:var(--font-mono)}
pre code{white-space:pre;overflow-wrap:normal}
blockquote{margin-inline:0}
.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-section);padding-bottom:var(--space-section)}
.section-heading{max-width:760px;margin-bottom:32px}
.section-heading h2{margin-top:0}
.decor-section{position:relative;overflow-x:clip}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid>*{min-width:0}
.flex-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono)}
.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}
.reveal{transition:opacity var(--duration-reveal) ease,transform var(--duration-reveal) ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.counter-stat,[data-counter]{display:inline-block;min-width:3ch;font-variant-numeric:tabular-nums;font-family:var(--font-mono);text-align:end}
.card{padding:28px;background:var(--bg-panel);border:1px solid var(--border-soft);border-radius:var(--r-card);box-shadow:inset 0 1px 0 var(--hi-line),var(--shadow-card);min-width:0}
.panel{padding:40px;background:var(--bg-panel-2);border:1px solid var(--border);border-radius:var(--r-shell);min-width:0}
.btn,.btn-primary,.btn-secondary,.btn-ghost,.login{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;flex-shrink:0;white-space:nowrap;max-width:100%;font-weight:var(--weight-semibold)}
.btn{min-height:48px;padding:12px 22px;border:1px solid var(--border);border-radius:var(--r-btn);background:var(--bg-panel);color:var(--text);gap:8px}
.btn-primary{gap:8px;height:48px;padding:0 20px 0 22px;border:0;border-radius:var(--r-btn);background:var(--accent);color:var(--bg-panel);font-size:17px;font-weight:var(--weight-bold);letter-spacing:.01em;transition:background var(--duration-fast)}
.btn-primary:hover,.btn-primary.is-hover{background:var(--accent-dark)}
.btn-secondary,.btn-ghost{height:60px;padding:0 26px;border-radius:var(--r-ctl);border:1.5px solid var(--text);background:var(--clear);color:var(--text);font-size:16px;transition:background var(--duration-fast),color var(--duration-fast)}
.btn-secondary:hover,.btn-ghost:hover,.btn-ghost.is-hover{background:var(--text);color:var(--bg-panel)}
.btn-primary:disabled,.btn:disabled{background:var(--bg-panel-2);color:var(--text-muted);border:1px solid var(--border)}
.btn.is-focus{outline:2px solid var(--accent-dark);outline-offset:3px}
.notice{background:var(--text);color:var(--accent-soft);font-size:14px;position:relative;z-index:2}
.notice-inner{min-height:40px;display:flex;align-items:center;justify-content:center;gap:18px;padding-block:6px;text-align:center;flex-wrap:wrap}
.notice strong{color:var(--bg-panel);font-weight:var(--weight-bold);letter-spacing:.01em}
.notice a{color:var(--bg-panel);font-weight:var(--weight-semibold);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px;display:inline-flex;align-items:center;min-height:24px}
.notice a:hover{color:var(--accent-soft)}
#site-header{position:relative;z-index:40}
.topbar{position:relative;z-index:2}
.topbar-inner{height:72px;display:flex;align-items:center;gap:40px;position:relative}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);flex-shrink:0;min-height:44px}
.brand img{width:36px;height:36px}
.brand-word{font-family:var(--font-display);font-weight:var(--weight-display);font-size:21px;letter-spacing:var(--tracking-display)}
.brand-zh{font-weight:var(--weight-medium);color:var(--text-muted);font-size:16px}
.nav-links{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:30px}
.nav-links a{text-decoration:none;font-size:15px;font-weight:var(--weight-medium);color:var(--text-muted);display:inline-flex;align-items:center;min-height:44px;white-space:nowrap;transition:color var(--duration-fast)}
.nav-links a:hover{color:var(--text)}
.nav-links a[aria-current="page"]{color:var(--text);font-weight:var(--weight-bold)}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:20px;flex-shrink:0}
.lang-switch{position:relative}
.lang{font-size:14.5px;font-weight:var(--weight-medium);color:var(--text-muted);background:none;border:0;padding:6px 2px;min-height:44px;min-width:44px;width:auto;white-space:nowrap}
.lang:hover{color:var(--text)}
.lang-list{position:absolute;right:0;top:100%;min-width:176px;list-style:none;margin:4px 0 0;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-card);z-index:5}
.lang-list a{display:flex;align-items:center;min-height:44px;padding:8px 12px;text-decoration:none;border-radius:var(--r-btn)}
.lang-list a:hover,.lang-list a[aria-current="true"]{background:var(--bg-panel-2);color:var(--accent-dark)}
.login{height:42px;padding:0 22px;border-radius:var(--r-ctl);border:1.5px solid var(--text);color:var(--text);font-size:15px;transition:background var(--duration-fast),color var(--duration-fast)}
.login:hover{background:var(--text);color:var(--bg-panel)}
.menu-toggle{display:none;min-width:44px;min-height:44px;padding:10px;border:1px solid var(--border);border-radius:var(--r-btn);background:var(--bg-panel);color:var(--text);align-items:center;justify-content:center}
.menu-toggle svg{width:22px;height:22px}
.mobile-drawer{display:none}
.nav-veil{position:fixed;inset:0;z-index:1;background:var(--veil);border:0;width:100%;height:100%;padding:0}
.site-footer{margin-top:64px;padding-top:56px;padding-bottom:28px;border-top:1px solid var(--border);background:var(--bg-panel-2)}
.footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:48px}
.footer-grid>*{min-width:0}
.footer-brand p{max-width:330px;margin-top:16px;color:var(--text-muted)}
.footer-heading{font-size:16px;font-weight:var(--weight-bold);margin:8px 0 16px}
.footer-links{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 16px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:32px;text-decoration:none;font-size:14px;overflow-wrap:anywhere}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{color:var(--accent-dark);text-decoration:underline}
.footer-languages{display:flex;flex-wrap:wrap;gap:6px 24px;padding-block:24px;margin-top:24px;border-block:1px solid var(--border)}
.footer-languages [aria-current="true"]{font-weight:var(--weight-bold);color:var(--accent-dark)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;padding-top:20px;font-size:13px;color:var(--text-muted)}
.footer-bottom p{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.prose{min-width:0;overflow-wrap:break-word}
.prose h2{margin-block:56px 24px}
.prose h3{margin-block:32px 16px}
.prose p,.prose li{line-height:1.85}
.prose a{color:var(--accent-dark)}
.prose a.btn-primary{color:var(--bg-panel)}
.prose img{border-radius:var(--r-card)}
#server-status{position:relative;display:block;min-height:120px;overflow:hidden;max-width:100%;margin-block:24px}
#server-status+*{margin-top:32px}
@media(max-width:1180px){
  .topbar-inner{gap:24px}
  .nav-links{gap:20px}
  .nav-tools{gap:14px}
}
@media(max-width:1080px){
  .desktop-nav{display:none}
  .nav-tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .mobile-drawer:not([hidden]){display:block;position:absolute;left:var(--gutter);right:var(--gutter);top:100%;z-index:4;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-card);padding:12px;max-height:calc(100dvh - 132px);overflow-y:auto;overscroll-behavior:contain}
  .mobile-drawer a{display:flex;width:100%;align-items:center;min-height:44px;padding:10px 14px;text-decoration:none;border-radius:var(--r-btn);color:var(--text)}
  .mobile-drawer a:hover,.mobile-drawer a[aria-current="page"]{background:var(--bg-panel-2);font-weight:var(--weight-bold)}
  .drawer-languages{border-top:1px solid var(--border);margin-top:8px;padding-top:8px}
}
@media(max-width:768px){
  :root{--size-h1:36px;--gutter:20px;--space-section:56px}
  .notice-inner{font-size:12.5px;gap:4px 12px}
  .topbar-inner{height:64px;gap:16px}
  .nav-tools{gap:12px;margin-left:auto}
  .login{height:38px;padding:0 16px}
  .grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:24px}
  .panel{padding:24px;border-radius:var(--r-mobile)}
  .card{padding:24px}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .tilt,.tilt-decor{transform:none}
  .decor-section,.decor-section>*{max-width:100%}
}
@media(max-width:380px){
  .brand{gap:6px}
  .brand img{width:30px;height:30px}
  .brand-word{font-size:18px}
  .nav-tools{gap:6px}
  .login{padding-inline:12px}
  .topbar-inner{gap:8px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation:none!important;transition:none!important}
}