:root {
  --bg:#E3EAF3;
  --bg-panel:#F5F8FC;
  --bg-panel-2:#D6E0EC;
  --border:#C3CFDF;
  --accent:#C8643F;
  --accent-dark:#9A4527;
  --accent-soft:#E7A585;
  --text:#121A26;
  --text-soft:#2A3547;
  --text-muted:#566376;
  --success:#2F8A5B;
  --warn:#B7791F;
  --error:#C0393B;
  --white:#FFFFFF;
  --ink-blue:#2C3E5C;
  --ink-blue-lift:#43597E;
  --ink-deep:#22324C;
  --ink-hover:#27344A;
  --hero-top:#EEF2FA;
  --hero-bottom:#DCE5F1;
  --sky-top:#EEF2FA;
  --sky-bottom:#D7E2F0;
  --ridge-far:#C9D6E7;
  --ridge-far-haze:#DAE3EF;
  --ridge-mid:#B3C3DA;
  --ridge-mid-haze:#C5D2E4;
  --ridge-near:#97AACA;
  --ridge-near-deep:#8497BB;
  --ridge-near-haze:#AABBD4;
  --btn-soft:#DCE3EC;
  --btn-soft-hover:#CDD7E3;
  --glass:rgba(255,255,255,.72);
  --glass-solid:rgba(255,255,255,.94);
  --glass-edge:rgba(255,255,255,.92);
  --white-a60:rgba(255,255,255,.6);
  --white-a35:rgba(255,255,255,.35);
  --veil-strong:rgba(240,244,250,.92);
  --veil-mid:rgba(240,244,250,.64);
  --veil-0:rgba(240,244,250,0);
  --accent-a0:rgba(200,100,63,0);
  --accent-a10:rgba(200,100,63,.10);
  --accent-a12:rgba(200,100,63,.12);
  --accent-a18:rgba(200,100,63,.18);
  --accent-a40:rgba(200,100,63,.40);
  --ink-a06:rgba(44,62,92,.06);
  --ink-a08:rgba(44,62,92,.08);
  --ink-a10:rgba(44,62,92,.10);
  --ink-a16:rgba(44,62,92,.16);
  --ink-a24:rgba(44,62,92,.24);
  --ink-a40:rgba(44,62,92,.40);
  --flag-red:#C9343C;
  --flag-blue:#24407C;
  --flag-white:#FFFFFF;
  --transparent:transparent;
  --radius-s:2px;
  --radius-l:6px;
  --radius-pill:999px;
  --radius-round:50%;
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Apple SD Gothic Neo","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Malgun Gothic","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --shadow-stage:0 40px 90px -36px var(--accent-a12),0 18px 40px -26px var(--ink-a16);
  --shadow-panel:0 34px 72px -22px var(--accent-a12),0 14px 30px -16px var(--ink-a10);
  --shadow-chip:0 14px 30px -10px var(--accent-a12),0 2px 6px var(--ink-a08);
  --page-inset:24px;
  --gutter:24px;
  --content-width:1280px;
  --header-height:64px;
  --toc-offset:16px;
  --anchor-offset:96px;
  --size-body:17px;
  --size-small:14px;
  --size-h1:clamp(52px,4.6vw,66px);
  --size-h2:clamp(28px,3vw,40px);
  --size-h3:24px;
  --weight-normal:400;
  --weight-medium:500;
  --weight-strong:600;
  --ease-ui:200ms ease;
}
*,*::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;font-family:var(--font-body);font-size:var(--size-body);line-height:1.6;color:var(--text);background:linear-gradient(180deg,var(--hero-top) 0,var(--hero-bottom) 900px,var(--bg) 1400px);-webkit-font-smoothing:antialiased}
a{color:inherit}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
button,a,input,select,textarea,summary{touch-action:manipulation}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--ink-blue);outline-offset:3px}
img{max-width:100%;height:auto}
svg{flex-shrink:0}
[hidden]{display:none!important}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:var(--weight-normal);color:var(--text);overflow-wrap:break-word;text-wrap:balance}
h1{font-size:var(--size-h1);line-height:1.12;letter-spacing:-.02em;margin:0 0 32px}
h2{font-size:var(--size-h2);line-height:1.25;letter-spacing:-.02em;margin:0 0 24px}
h3{font-size:var(--size-h3);line-height:1.35;margin:0 0 16px}
p{margin:0 0 20px}
strong{font-weight:var(--weight-strong)}
code,kbd,pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere;font-size:.88em}
pre{max-width:100%;overflow-x:auto;padding:24px;background:var(--bg-panel-2);border-radius:var(--radius-s)}
pre code{overflow-wrap:normal}
blockquote{margin-inline:0}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:72px;padding-bottom:72px}
.reading-wrap{max-width:880px}
:where(.grid,.plan-grid,.platform-grid,.footer-grid)>*{min-width:0}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.small{font-size:var(--size-small)}
.panel,.card{min-width:0;background:var(--bg-panel);border-radius:var(--radius-l);padding:32px;box-shadow:inset 0 1px 0 var(--white),var(--shadow-panel)}
.decoration-host{position:relative;overflow-x:clip}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 24px;border:0;border-radius:var(--radius-s);font-size:16px;font-weight:var(--weight-medium);letter-spacing:.01em;line-height:1.5;text-align:center;text-decoration:none;transition:background-color var(--ease-ui);flex-shrink:0;white-space:nowrap}
.btn-ink,.btn-primary{background:var(--text);color:var(--white)}
.btn-ink:hover,.btn-primary:hover,.btn.is-hover{background:var(--ink-hover);color:var(--white)}
.btn-soft,.btn-secondary{background:var(--btn-soft);color:var(--text);box-shadow:inset 0 1px 0 var(--white-a60)}
.btn-soft:hover,.btn-secondary:hover{background:var(--btn-soft-hover)}
.btn:disabled,.btn[aria-disabled="true"]{cursor:not-allowed;background:var(--bg-panel-2);color:var(--text-muted)}
.btn.is-focus{outline:2px solid var(--ink-blue);outline-offset:3px}
.btn-ink span{font-size:19px;line-height:1;transform:translateY(-1px)}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:0 0 32px}
.notice{background:linear-gradient(90deg,var(--ink-blue) 0%,var(--ink-blue-lift) 46%,var(--accent) 100%);color:var(--white);font-size:14px}
.notice-inner{min-height:40px;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px 18px;padding:6px var(--page-inset)}
.notice-text{margin:0;letter-spacing:.01em}
.notice-link{display:inline-flex;align-items:center;min-height:24px;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.notice-link:hover{text-decoration-thickness:2px}
.notice-pill{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:3px 12px;min-height:26px;border-radius:var(--radius-pill);background:var(--white);color:var(--text);font-size:13px;font-weight:var(--weight-medium);text-decoration:none;line-height:1.5}
.notice-pill:hover{background:var(--bg-panel)}
#site-header{position:relative;z-index:50}
.masthead{position:relative;z-index:53;padding:0 var(--page-inset);background:var(--hero-top)}
.masthead-inner{height:var(--header-height);display:flex;align-items:center;gap:32px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;text-decoration:none;color:var(--text);font-family:var(--font-display);font-size:19px;font-weight:var(--weight-strong);letter-spacing:-.015em}
.brand img{width:30px;height:30px;display:block}
.primary-nav{flex:1;min-width:0;display:flex;justify-content:center}
.primary-nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:30px}
.primary-nav a{display:inline-flex;align-items:center;min-height:32px;font-size:15px;color:var(--text-muted);text-decoration:none;padding:6px 0;white-space:nowrap;transition:color var(--ease-ui)}
.primary-nav a:hover{color:var(--text)}
.primary-nav a[aria-current="page"]{color:var(--text);font-weight:var(--weight-medium)}
.mast-tools{display:flex;align-items:center;gap:10px;flex-shrink:0;margin-left:auto}
.language-picker{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:5px;min-height:36px;width:auto;min-width:44px;font:inherit;font-size:14px;color:var(--text-muted);background:var(--transparent);border:0;padding:8px 10px;cursor:pointer;white-space:nowrap}
.lang:hover{color:var(--text)}
.language-menu{position:absolute;right:0;top:calc(100% + 8px);z-index:60;min-width:180px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-l);box-shadow:var(--shadow-panel)}
.language-menu a{display:flex;align-items:center;width:100%;min-height:44px;padding:8px 12px;text-decoration:none;font-size:14px}
.language-menu a:hover,.language-menu a[aria-current="true"]{background:var(--bg-panel-2)}
.login{display:inline-flex;align-items:center;justify-content:center;height:36px;padding:0 18px;border-radius:var(--radius-s);background:var(--btn-soft);color:var(--text);font-size:14px;font-weight:var(--weight-medium);text-decoration:none;box-shadow:inset 0 1px 0 var(--white-a60);white-space:nowrap}
.login:hover{background:var(--btn-soft-hover)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;padding:10px;border:0;border-radius:var(--radius-s);background:var(--transparent);color:var(--text)}
.menu-line{display:block;width:20px;height:2px;background:currentColor}
.nav-drawer{position:fixed;z-index:52;left:0;right:0;top:var(--drawer-top,var(--header-height));height:calc(100dvh - var(--drawer-top,var(--header-height)));max-height:calc(100dvh - var(--drawer-top,var(--header-height)));overflow-y:auto;overscroll-behavior:contain;padding:20px var(--gutter) 40px;background:var(--bg-panel)}
.nav-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;text-decoration:none}
.nav-drawer a:hover,.nav-drawer a[aria-current="page"]{background:var(--bg-panel-2)}
.drawer-languages{margin-top:24px;padding-top:16px;border-top:1px solid var(--border)}
.drawer-languages a[aria-current="true"]{font-weight:var(--weight-strong)}
.site-footer{margin-top:72px;background:var(--bg-panel-2);box-shadow:inset 0 1px 0 var(--white-a60);padding-top:56px;padding-bottom:24px}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:48px}
.footer-brand p{max-width:30em;margin-top:20px;color:var(--text-muted);font-size:15px}
.footer-heading{font-size:16px;font-weight:var(--weight-medium);margin:0 0 16px}
.footer-links{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.footer-links a{display:inline-flex;align-items:center;min-height:30px;font-size:14px;text-decoration:none}
.footer-links a:hover{text-decoration:underline;text-underline-offset:4px}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:40px;padding-top:20px;border-top:1px solid var(--border);font-size:13px;color:var(--text-muted)}
.footer-bottom p{margin:0}
.footer-languages,.legal-links{display:flex;flex-wrap:wrap;gap:8px 18px}
.footer-languages a,.legal-links a{display:inline-flex;align-items:center;min-height:26px}
.reveal{transition:opacity .35s ease,transform .35s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:static;display:block;min-height:48px;overflow:hidden;max-width:100%;margin-top:24px;margin-bottom:24px}
#server-status+*{margin-top:24px}
@media(min-width:1101px) and (max-width:1280px){
  .masthead-inner{gap:20px}
  .primary-nav ul{gap:20px}
  .primary-nav a{font-size:14px}
  .mast-tools{gap:6px}
}
@media(max-width:1100px){
  .primary-nav{display:none}
  .masthead-inner{justify-content:space-between;gap:16px}
  .mast-tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .footer-grid{gap:32px}
}
@media(max-width:768px){
  :root{--page-inset:12px;--gutter:20px;--size-h1:clamp(28px,8vw,40px)}
  h1{line-height:1.15}
  .section{padding-top:48px;padding-bottom:48px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
  .panel,.card{padding:24px}
  .notice{font-size:13px}
  .masthead-inner{gap:8px}
  .mast-tools{gap:4px}
  .lang{font-size:12px;padding:8px 4px}
  .brand{font-size:17px;gap:7px}
  .login{padding:0 12px}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .tilt,[data-tilt]{transform:none}
  .decoration-host>*{max-width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .footer-bottom{flex-direction:column}
}
@media(max-width:360px){
  .brand{font-size:15px;gap:5px}
  .brand img{width:26px;height:26px}
  .mast-tools{gap:2px}
  .login{padding:0 9px;font-size:13px}
  .lang{font-size:11px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}