:root{
  --bg:#E5F0F1;--sky-top:#EEF6F7;--sky-bottom:#DCEAEC;
  --panel:#F6FBFB;--panel-2:#D6E7E9;--border:#C3D7DA;--border-strong:#A9C0C4;
  --accent:#CF4330;--accent-2:#E8743F;--accent-dark:#A3301F;
  --text:#1D2B2F;--muted:#5A6E73;--faint:#8A9DA1;
  --success:#2E8F6A;--success-soft:#7FD0AE;--success-face:rgba(46,143,106,.12);
  --warn:#C98A12;--error:#B42318;--ink:#1D3A40;
  --side-top:#22343A;--side-bottom:#1A282D;--side-text:rgba(222,236,238,.76);
  --side-strong:#EEF6F7;--side-dim:rgba(222,236,238,.42);
  --side-on:rgba(238,246,247,.11);--side-line:rgba(238,246,247,.08);
  --side-chip:rgba(238,246,247,.06);
  --white:#FFFFFF;--glass:rgba(255,255,255,.55);--glass-strong:rgba(246,251,251,.92);
  --highlight:rgba(255,255,255,.92);--highlight-dim:rgba(255,255,255,.16);
  --shadow-ink:rgba(29,58,64,.12);--shadow-ink-soft:rgba(29,58,64,.07);
  --shadow-ink-faint:rgba(29,58,64,.05);--win-edge:rgba(29,58,64,.07);
  --accent-glow:rgba(207,67,48,.06);--accent-face:rgba(207,67,48,.06);
  --accent-face-2:rgba(232,116,63,.03);--accent-edge:rgba(207,67,48,.22);
  --accent-bar:rgba(207,67,48,.72);--accent-mark:rgba(232,116,63,.34);
  --accent-line:rgba(232,116,63,.66);--accent-shadow:rgba(207,67,48,.26);
  --grey-bar:#A7B9BD;--query-bg:rgba(214,231,233,.62);
  --tape:rgba(214,231,233,.82);--line-art:#A8BCC0;
  --line-art-fill:rgba(195,215,218,.45);
  --dot-red:#EE6A5F;--dot-yellow:#F5BE4F;--dot-green:#61C554;
  --flag-red:#C8313A;--flag-blue:#223F7A;--flag-white:#FFFFFF;
  --flag-edge:rgba(29,43,47,.16);
  --r-xs:6px;--r-sm:8px;--r-md:12px;--r-lg:20px;--r-pill:999px;
  --gutter:32px;--head-height:64px;
  --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
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--head-height) + 16px);-webkit-text-size-adjust:100%}
html.nav-open{overflow:hidden}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 var(--font-body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
ul,ol,dl,dd{margin:0;padding:0}
ul{list-style:none}
img,svg{max-width:100%}
svg{flex-shrink:0}
h1,h2,h3{font-family:var(--font-display);line-height:1.2;letter-spacing:-.02em;text-wrap:balance}
h1{font-size:clamp(52px,5vw,72px);font-weight:800}
h2{font-size:clamp(30px,3.5vw,44px)}
p{margin:0 0 1em}
code,pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto}
pre code{overflow-wrap:normal}
.wrap{width:100%;max-width:1280px;margin-inline:auto;padding-inline:var(--gutter);min-width:0}
.sec{padding-top:88px;padding-bottom:88px;overflow-x:clip}
.sec > *{min-width:0}
.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}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--r-xs)}
.skip{position:absolute;left:16px;top:-48px;z-index:100;padding:8px 14px;background:var(--ink);color:var(--side-strong);border-radius:var(--r-sm)}
.skip:focus{top:12px}
.ico{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.reveal{transition:opacity .55s ease,transform .55s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:0 26px;border:0;border-radius:var(--r-md);font-size:16px;font-weight:600;line-height:1;white-space:nowrap;flex-shrink:0;transition:transform .2s,box-shadow .2s}
.btn svg{width:18px;height:18px}
.btn-main{color:var(--white);background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 12px 26px var(--accent-shadow),inset 0 1px 0 var(--highlight-dim)}
.btn-main:hover{transform:translateY(-1px);box-shadow:0 16px 30px var(--accent-shadow)}
.btn-ghost{color:var(--text);background:var(--white);box-shadow:inset 0 0 0 1px var(--border),0 4px 12px var(--shadow-ink-faint)}
.btn-ghost:hover{box-shadow:inset 0 0 0 1px var(--border-strong),0 6px 16px var(--shadow-ink-soft)}
.panel,.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:inset 0 1px 0 var(--highlight),0 16px 36px var(--shadow-ink-faint)}
.badge{display:inline-flex;align-items:center;gap:8px;min-height:30px;max-width:100%;padding:0 14px 0 12px;border-radius:var(--r-pill);background:var(--glass-strong);box-shadow:inset 0 0 0 1px var(--border),0 1px 0 var(--highlight);font-size:13px;font-weight:500;color:var(--muted);letter-spacing:.02em;overflow:hidden}
.badge-dot{width:7px;height:7px;flex-shrink:0;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px var(--accent-face)}
.tag{display:inline-flex;align-items:center;max-width:100%;overflow:hidden;padding:2px 8px;border-radius:var(--r-xs);background:var(--panel-2);font:11px/1.5 var(--font-mono);color:var(--ink)}
/* Shared header */
.site-head{position:relative;z-index:30}
.head-in{display:flex;align-items:center;gap:24px;min-height:var(--head-height)}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;font:800 20px/1 var(--font-display);letter-spacing:-.01em}
.brand img{width:30px;height:30px}
.brand-local{font-size:14px;font-weight:500;color:var(--muted)}
.nav{margin-left:auto}
.nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.nav a{display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:8px 11px;border-radius:var(--r-sm);font-size:14.5px;line-height:1;color:var(--muted);white-space:nowrap;transition:color .2s,background-color .2s}
.nav a svg{width:16px;height:16px}
.nav a:hover{color:var(--text);background:var(--glass)}
.nav a[aria-current="page"]{color:var(--text);font-weight:600;background:var(--glass-strong);box-shadow:inset 0 0 0 1px var(--border),0 1px 0 var(--highlight)}
.nav a[aria-current="page"] svg{color:var(--accent)}
.head-tools{display:flex;align-items:center;gap:10px}
.lang-holder{position:relative}
.lang-button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;width:auto;padding:0 10px;border:0;border-radius:var(--r-sm);background:transparent;color:var(--muted);font-size:14px;white-space:nowrap}
.lang-button svg{width:16px;height:16px}
.lang-button:hover{background:var(--glass);color:var(--text)}
.lang-menu{position:absolute;right:0;top:calc(100% + 8px);width:156px;padding:6px;border:1px solid var(--border);border-radius:var(--r-md);background:var(--panel);box-shadow:0 14px 32px var(--shadow-ink);z-index:40}
.lang-menu[hidden]{display:none}
.lang-menu a{display:flex;align-items:center;min-height:40px;padding:8px 10px;border-radius:var(--r-sm);font-size:14px}
.lang-menu a:hover,.lang-menu a[aria-current]{background:var(--panel-2)}
.login{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;padding:0 16px;border-radius:var(--r-sm);background:var(--ink);color:var(--side-strong);font-size:14px;font-weight:600;line-height:1;white-space:nowrap;box-shadow:0 6px 14px var(--shadow-ink-soft),inset 0 1px 0 var(--highlight-dim)}
.login svg{width:15px;height:15px}
.login:hover{background:var(--side-top)}
.hamburger{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--panel);color:var(--text)}
.hamburger svg{width:22px;height:22px}
.mobile-nav{display:none}
.nav-veil{display:none}
/* Shared footer */
.site-footer{margin-top:80px;padding-top:64px;background:var(--ink);color:var(--side-text)}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1.4fr 1fr;gap:36px}
.site-footer .brand{color:var(--side-strong)}
.site-footer h2{margin:0 0 16px;color:var(--side-strong);font-size:15px;letter-spacing:0}
.site-footer p{margin:18px 0 0;max-width:290px;font-size:14px}
.foot-links{display:grid;gap:8px}
.foot-links a{display:inline-flex;align-items:center;min-height:28px;font-size:14px}
.foot-links a:hover,.foot-bottom a:hover{color:var(--white)}
.foot-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:52px;padding-top:22px;padding-bottom:26px;border-top:1px solid var(--side-line);font-size:13px}
.foot-bottom a{margin-left:18px}
#server-status{position:relative;display:block;max-width:100%;overflow:hidden;margin-bottom:32px}
#server-status + *{margin-top:32px}
@media(max-width:1100px){
  .head-in{gap:12px}
  .nav a{font-size:12.5px;padding-inline:7px}
  .nav a svg{width:14px;height:14px}
}
@media(max-width:900px){
  .nav{display:none}
  .head-tools{margin-left:auto;gap:6px}
  .hamburger{display:inline-flex}
  .site-head{z-index:30}
  .mobile-nav{position:absolute;left:var(--gutter);right:var(--gutter);top:var(--head-height);z-index:32;max-height:calc(100dvh - var(--head-height) - 12px);overflow-y:auto;overscroll-behavior:contain;padding:12px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:0 24px 50px var(--shadow-ink)}
  .mobile-nav.is-open{display:block}
  .mobile-nav a{display:flex;align-items:center;gap:12px;width:100%;min-height:48px;padding:12px;border-radius:var(--r-sm);font-size:15px}
  .mobile-nav a svg{width:18px;height:18px}
  .mobile-nav a:hover,.mobile-nav a[aria-current="page"]{background:var(--panel-2);color:var(--accent-dark)}
  .mobile-nav .mobile-language{border-top:1px solid var(--border);margin-top:10px;padding-top:10px}
  .nav-veil.is-open{display:block;position:fixed;inset:0;z-index:29;background:var(--shadow-ink)}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:768px){
  h1{font-size:clamp(28px,7vw,40px)}
  .sec{padding-top:64px;padding-bottom:64px}
}
@media(max-width:640px){
  :root{--gutter:18px}
  .no-break{white-space:normal}
  .head-in{gap:8px}
  .brand{font-size:18px}
  .brand img{width:26px;height:26px}
  .lang-button{padding-inline:5px;min-width:32px}
  .lang-button span{display:none}
  .login{padding-inline:11px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px 18px}
  .foot-grid > :first-child{grid-column:1/-1}
  .foot-bottom a{margin:0 16px 0 0}
  .tilt,.note{transform:none}
}
@media(max-width:360px){:root{--gutter:16px}.brand-local{display:none}.head-tools{gap:4px}.login{padding-inline:9px}}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}