:root{
  --color-bg:#0B2D3E;
  --color-panel:#113A4E;
  --color-panel-raised:#174659;
  --color-border:#24566B;
  --color-border-strong:#2E6479;
  --color-accent:#F2809F;
  --color-accent-dark:#D65E82;
  --color-text:#EAF3F7;
  --color-muted:#9FB8C4;
  --color-success:#4ED8A0;
  --color-warning:#FFC24D;
  --color-error:#FF6B6B;
  --color-shadow:rgba(3,14,21,.5);
  --color-shadow-soft:rgba(3,14,21,.3);
  --color-accent-halo:rgba(242,128,159,.16);
  --color-accent-faint:rgba(242,128,159,.08);
  --color-panel-halo:rgba(23,70,89,.55);
  --color-highlight:rgba(234,243,247,.05);
  --color-overlay:rgba(3,14,21,.72);
  --color-focus-gap:#0B2D3E;
  --flag-red:#D8495C;
  --flag-white:#F0F5F8;
  --flag-blue:#2D4F86;
  --flag-gold:#E9B94A;
  --flag-black:#0E1C26;
  --font-display:'Inter','Noto Sans SC','Noto Sans JP','Noto Sans KR',-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Inter','Noto Sans SC','Noto Sans JP','Noto Sans KR',-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,'SF Mono',Consolas,'Courier New',monospace;
  --radius-xl:32px;
  --radius-lg:24px;
  --radius-md:14px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow-deep:0 28px 64px var(--color-shadow);
  --shadow-mid:0 8px 24px var(--color-shadow-soft);
  --shadow-inset:inset 0 1px 0 var(--color-highlight);
  --shadow-button:0 8px 24px rgba(214,94,130,.32);
  --page-max:1240px;
  --reading-max:780px;
  --gutter:clamp(16px,3vw,36px);
  --header-height:74px;
  --section-space:clamp(64px,8vw,112px);
  --transition-fast:180ms ease;
  --transition-slow:420ms cubic-bezier(.2,.7,.2,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px;background:var(--color-bg)}
html.nav-open{overflow:hidden}
body{margin:0;min-width:320px;overflow-x:clip;background:radial-gradient(1100px 620px at 76% 6%,var(--color-accent-faint),transparent 62%),radial-gradient(920px 700px at 10% 92%,var(--color-panel-halo),transparent 66%),var(--color-bg);color:var(--color-text);font-family:var(--font-body);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}
img,svg,video{display:block;max-width:100%}
img{height:auto}
button,input,select,textarea{font:inherit}
button{color:inherit}
a{color:inherit;text-decoration:none}
p,h1,h2,h3,h4,ul,ol,figure,blockquote{margin-top:0}
ul[role="list"],.plain-list{list-style:none;padding:0}
main,section,article,aside,header,footer,nav,div{min-width:0}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:400;line-height:1.18;letter-spacing:-.01em;text-wrap:balance}
h1{font-size:clamp(52px,5.5vw,72px)}
h2{font-size:clamp(32px,4vw,50px)}
h3{font-size:clamp(21px,2.3vw,30px)}
p{color:var(--color-muted)}
strong{color:var(--color-text);font-weight:600}
code,kbd,pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-panel);color:var(--color-text);-webkit-overflow-scrolling:touch}
::selection{background:var(--color-accent);color:var(--color-bg)}
:focus-visible{outline:2px solid var(--color-accent);outline-offset:3px}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:var(--page-max);margin-inline:auto;padding-inline:var(--gutter)}
.reading{width:100%;max-width:var(--reading-max);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space);overflow-x:clip}
.section-tight{padding-top:48px;padding-bottom:48px;overflow-x:clip}
.eyebrow{margin-bottom:12px;color:var(--color-accent);font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.15em;text-transform:uppercase}
.lead{max-width:720px;font-size:clamp(17px,1.8vw,21px)}
.muted{color:var(--color-muted)}
.accent{color:var(--color-accent)}
.badge{display:inline-flex;max-width:100%;min-height:28px;align-items:center;gap:8px;padding:4px 12px;overflow:hidden;border:1px solid var(--color-border);border-radius:var(--radius-pill);background:var(--color-panel);color:var(--color-muted);font-size:12px;line-height:1.4;box-shadow:var(--shadow-inset)}
.badge-dot{width:7px;height:7px;flex-shrink:0;border-radius:50%;background:var(--color-success)}
.btn{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:12px 28px;border:1px solid transparent;border-radius:12px;cursor:pointer;font-weight:600;letter-spacing:.01em;transition:transform var(--transition-fast),background var(--transition-fast),border-color var(--transition-fast)}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--color-accent);color:var(--color-bg);box-shadow:var(--shadow-button)}
.btn-primary:hover{background:var(--color-accent-dark)}
.btn-secondary{border-color:var(--color-border-strong);background:transparent;color:var(--color-text)}
.btn-secondary:hover{border-color:var(--color-accent)}
.btn-quiet{border-color:var(--color-border);background:var(--color-panel-raised);color:var(--color-text)}
.btn[aria-disabled="true"],.btn:disabled{cursor:not-allowed;opacity:.55;transform:none}
.button-row{display:flex;flex-wrap:wrap;gap:14px}
.panel,.card{border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-panel);box-shadow:var(--shadow-mid),var(--shadow-inset)}
.card{padding:clamp(20px,3vw,32px)}
.card-raised{background:var(--color-panel-raised);box-shadow:var(--shadow-deep),var(--shadow-inset)}
.site-head{position:relative;z-index:50;border-bottom:1px solid var(--color-border);background:var(--color-bg)}
.head-inner{display:flex;height:var(--header-height);align-items:center;gap:30px}
.brand{display:flex;flex:none;align-items:center;gap:10px;min-height:44px}
.brand-logo{width:30px;height:30px;flex-shrink:0}
.brand-name{font-size:19px;font-weight:650}
.brand-local{color:var(--color-muted);font-size:13px;font-weight:400}
.desktop-nav{display:flex;align-items:center;gap:22px;min-width:0}
.desktop-nav a{display:inline-flex;min-height:44px;align-items:center;color:var(--color-muted);font-size:13px;white-space:nowrap}
.desktop-nav a:hover,.desktop-nav a.is-active{color:var(--color-text)}
.desktop-nav a.is-active{font-weight:650}
.head-tools{display:flex;flex:none;align-items:center;gap:10px;margin-left:auto}
.login-btn{display:inline-flex;min-height:40px;align-items:center;padding:7px 18px;border:1px solid var(--color-border-strong);border-radius:var(--radius-sm);background:var(--color-panel-raised);font-size:13px;font-weight:650}
.language-box{position:relative}
.language-toggle,.menu-toggle{display:inline-flex;min-width:44px;min-height:44px;align-items:center;justify-content:center;border:0;background:transparent;cursor:pointer;color:var(--color-muted)}
.language-toggle{gap:6px;padding-inline:8px;white-space:nowrap}
.language-menu{position:absolute;top:calc(100% + 8px);right:0;z-index:70;display:none;width:168px;padding:8px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-panel-raised);box-shadow:var(--shadow-deep)}
.language-box.is-open .language-menu{display:block}
.language-menu a{display:flex;min-height:42px;align-items:center;padding:8px 12px;border-radius:var(--radius-sm);color:var(--color-muted)}
.language-menu a:hover,.language-menu a[aria-current="true"]{background:var(--color-panel);color:var(--color-text)}
.menu-toggle{display:none}
.menu-toggle-lines,.menu-toggle-lines::before,.menu-toggle-lines::after{display:block;width:20px;height:2px;background:var(--color-text);content:"";transition:transform var(--transition-fast)}
.menu-toggle-lines::before{transform:translateY(-6px)}
.menu-toggle-lines::after{transform:translateY(4px)}
.menu-toggle[aria-expanded="true"] .menu-toggle-lines{background:transparent}
.menu-toggle[aria-expanded="true"] .menu-toggle-lines::before{transform:translateY(0) rotate(45deg)}
.menu-toggle[aria-expanded="true"] .menu-toggle-lines::after{transform:translateY(-2px) rotate(-45deg)}
.mobile-nav{position:absolute;top:var(--header-height);right:0;left:0;z-index:60;display:none;max-height:calc(100dvh - var(--header-height));overflow-y:auto;padding:10px var(--gutter) 22px;border-top:1px solid var(--color-border);background:var(--color-panel);overscroll-behavior:contain}
.mobile-nav.is-open{display:block}
.mobile-nav a{display:flex;width:100%;min-height:48px;align-items:center;padding:11px 12px;border-bottom:1px solid var(--color-border);color:var(--color-muted)}
.mobile-nav a.is-active{color:var(--color-text);font-weight:650}
.mobile-language-label{padding:18px 12px 6px;color:var(--color-accent);font-family:var(--font-mono);font-size:11px;letter-spacing:.12em}
.nav-veil{position:fixed;inset:var(--header-height) 0 0;z-index:40;display:none;background:var(--color-overlay)}
.nav-veil.is-open{display:block}
.site-foot{margin-top:var(--section-space);border-top:1px solid var(--color-border);background:var(--color-panel)}
.footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1.15fr .8fr;gap:40px;padding-top:64px;padding-bottom:48px}
.footer-brand p{max-width:310px;margin-top:18px}
.footer-title{margin-bottom:14px;color:var(--color-text);font-size:14px;font-weight:650}
.footer-links{display:grid;gap:8px}
.footer-links a{display:inline-flex;min-height:28px;align-items:center;color:var(--color-muted);font-size:13px}
.footer-links a:hover{color:var(--color-accent)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:18px;padding-top:20px;padding-bottom:26px;border-top:1px solid var(--color-border);color:var(--color-muted);font-size:12px}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px}
.reveal{transition:opacity .55s ease,transform .55s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.prose h2,.prose h3{margin-top:1.8em;scroll-margin-top:120px}
.prose a:not(.btn){color:var(--color-accent);text-decoration:underline;text-underline-offset:3px}
.prose li{margin-bottom:.55em;color:var(--color-muted)}
.prose img{border-radius:var(--radius-md)}
@media(max-width:1080px){
  .desktop-nav{gap:13px}
  .desktop-nav a{font-size:12px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:900px){
  .desktop-nav,.language-box{display:none}
  .menu-toggle{display:inline-flex}
  .head-tools{margin-left:auto}
}
@media(max-width:768px){
  h1{font-size:clamp(28px,9vw,40px);line-height:1.14;letter-spacing:-.01em}
  h2{font-size:clamp(28px,7vw,38px)}
  .brand-local{display:none}
  .login-btn{padding-inline:13px}
}
@media(max-width:640px){
  .section{padding-top:64px;padding-bottom:64px}
  .section-tight{padding-top:38px;padding-bottom:38px}
  .button-row .btn{flex:1 1 140px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{display:block}
  .footer-legal{margin-top:12px}
  .tilt,.tilt-card,[data-tilt]{transform:none!important}
}
@media(max-width:380px){
  .head-inner{gap:8px}
  .brand-name{font-size:17px}
  .login-btn{padding-inline:10px}
}
@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{opacity:1!important;transform:none!important}
}