:root {
  --c-bg:#ffffff;
  --c-panel:#f6f7f9;
  --c-panel-2:#eef0f4;
  --c-border:#e3e6eb;
  --c-border-strong:#cfd4db;
  --c-line-dash:#b8bfca;
  --c-accent:#0f62fe;
  --c-accent-dark:#0a47c2;
  --c-accent-soft:#eaf1ff;
  --c-text:#0e1014;
  --c-muted:#5d6470;
  --c-faint:#8a909a;
  --c-success:#1f9d57;
  --c-warn:#b7791f;
  --c-error:#d6383a;
  --c-on-dark:#ffffff;
  --c-on-dark-muted:#b9bec7;
  --c-clear:transparent;
  --f-display:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans","Microsoft YaHei",sans-serif;
  --f-body:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans","Microsoft YaHei",sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --r-pill:999px;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:8px;
  --r-xs:5px;
  --r-shot:8px;
  --r-circle:50%;
  --r-zero:0;
  --r-tab-tip:0 0 2px 0;
  --shadow-hair:0 1px 2px rgba(14,16,20,.04);
  --ring:0 0 0 3px rgba(15,98,254,.28);
  --wrap:1200px;
  --header-wrap:1280px;
  --reading:800px;
  --gutter:32px;
  --section-gap:140px;
  --code-lh:30px;
  --t-fast:.18s ease;
  --t-reveal:.5s ease;
  --size-body:16px;
  --size-small:13px;
  --size-h1:clamp(34px,3.4vw,48px);
  --size-h2:clamp(26px,2.8vw,36px);
  --size-h3:22px;
  --weight-normal:400;
  --weight-medium:500;
  --header-height:104px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:24px}
html.nav-open{overflow:hidden}
body{margin:0;background:var(--c-bg);color:var(--c-text);font-family:var(--f-body);font-size:var(--size-body);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
button,a{-webkit-tap-highlight-color:var(--c-clear)}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:4px}
a:focus-visible,button:focus-visible{outline:none;box-shadow:var(--ring);border-radius:var(--r-sm)}
img{max-width:100%;height:auto}
svg{display:block;flex-shrink:0}
[hidden]{display:none!important}
h1,h2,h3,h4{font-family:var(--f-display);font-weight:var(--weight-normal);line-height:1.25;text-wrap:balance;overflow-wrap:break-word}
h1{font-size:var(--size-h1);line-height:1.12;letter-spacing:-.02em}
h2{font-size:var(--size-h2);letter-spacing:-.02em}
h3{font-size:var(--size-h3)}
p{margin:0 0 1.2em}
strong{font-weight:var(--weight-medium)}
code,kbd,pre{font-family:var(--f-mono)}
code{overflow-wrap:anywhere}
pre{max-width:100%;min-width:0;overflow-x:auto;padding:20px;border:1px solid var(--c-border);border-radius:var(--r-md);background:var(--c-panel);color:var(--c-text);font-size:13px;line-height:1.8}
pre code{overflow-wrap:normal;word-break:normal;white-space:pre}
blockquote{margin-inline:0}
hr{border:0;border-top:1px solid var(--c-border)}
.wrap{width:100%;max-width:calc(var(--wrap) + var(--gutter) * 2);margin-inline:auto;padding-inline:var(--gutter)}
.reading{max-width:calc(var(--reading) + var(--gutter) * 2)}
.section{margin-top:var(--section-gap);padding-top:32px;border-top:1px solid var(--c-border)}
.section__intro{max-width:720px;margin-bottom:32px}
.section__intro h2{margin:0 0 16px}
.muted{color:var(--c-muted)}
.eyebrow{font-size:12px;letter-spacing:.04em;color:var(--c-muted)}
.keep{white-space:nowrap}
.text-link{color:var(--c-accent);text-decoration:underline;text-underline-offset:4px}
.grid-two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.grid-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid-two>*,.grid-three>*,.hero__top>*,.features-split>*,.footer-grid>*{min-width:0}
.card{padding:28px;border:1px solid var(--c-border);border-radius:var(--r-md);background:var(--c-bg);color:var(--c-text)}
.card h3{margin:0 0 14px}
.panel{padding:32px;border:1px solid var(--c-border);border-radius:var(--r-lg);background:var(--c-panel);color:var(--c-text)}
.actions{margin-top:28px;display:flex;align-items:center;flex-wrap:wrap;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:48px;padding:10px 24px;border:1px solid var(--c-clear);border-radius:var(--r-pill);font-size:15px;font-weight:var(--weight-medium);letter-spacing:-.005em;text-align:center;transition:background var(--t-fast),border-color var(--t-fast),color var(--t-fast)}
.btn svg{width:17px;height:17px}
.btn--store{background:var(--c-accent);color:var(--c-on-dark);padding-left:20px}
.btn--store svg{margin-top:-2px}
.btn--store:hover,.btn--store.is-hover{background:var(--c-accent-dark);color:var(--c-on-dark)}
.btn--line{background:var(--c-bg);color:var(--c-text);border-color:var(--c-border-strong)}
.btn--line svg{width:15px;height:15px;color:var(--c-muted);transition:transform var(--t-fast)}
.btn--line:hover{border-color:var(--c-text)}
.btn--line:hover svg{transform:translateX(2px)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--c-panel-2);color:var(--c-muted);border-color:var(--c-border);cursor:not-allowed}
.btn.is-focus{box-shadow:var(--ring)}
.notice{background:var(--c-text);color:var(--c-on-dark)}
.notice__inner{height:40px;display:flex;align-items:center;justify-content:center;gap:14px;font-size:13px;letter-spacing:.01em}
.notice__text{color:var(--c-on-dark)}
.notice__sep{color:var(--c-on-dark-muted);margin-inline:2px}
.notice__dev{color:var(--c-on-dark-muted)}
.notice__cta{display:inline-flex;align-items:center;gap:6px;min-height:26px;padding:2px 12px;border-radius:var(--r-pill);background:var(--c-accent);color:var(--c-on-dark);font-size:12.5px;font-weight:var(--weight-medium);transition:background var(--t-fast)}
.notice__cta:hover{background:var(--c-accent-dark);color:var(--c-on-dark)}
.notice__cta svg{width:12px;height:12px}
#site-header{position:relative;z-index:50}
.masthead{background:var(--c-bg);color:var(--c-text);border-bottom:1px solid var(--c-border)}
.masthead__inner{position:relative;z-index:3;width:100%;max-width:min(100%,calc(var(--header-wrap) + var(--gutter) * 2));margin-inline:auto;padding-inline:var(--gutter);height:64px;display:flex;align-items:center;gap:40px;background:var(--c-bg);color:var(--c-text)}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand__mark{display:block;flex-shrink:0;width:30px;height:30px;border-radius:var(--r-sm);background:var(--c-panel-2);color:var(--c-text);border:1px solid var(--c-border)}
.brand__name{font-size:16px;font-weight:var(--weight-medium);letter-spacing:-.01em}
.brand__sub{font-size:12.5px;color:var(--c-muted);padding-left:10px;border-left:1px solid var(--c-border)}
.mainnav{flex:1;min-width:0}
.mainnav__list{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:2px}
.mainnav__link{display:inline-flex;align-items:center;gap:7px;min-height:36px;padding:6px 12px;border-radius:var(--r-pill);font-size:14px;color:var(--c-text);white-space:nowrap;transition:background var(--t-fast),color var(--t-fast)}
.mainnav__link svg{width:16px;height:16px;color:var(--c-muted)}
.mainnav__link:hover,.mainnav__link[aria-current="page"]{background:var(--c-panel);color:var(--c-text)}
.mainnav__link[aria-current="page"]{font-weight:var(--weight-medium)}
.mainnav__link[aria-current="page"] svg{color:var(--c-accent)}
.header-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;gap:7px;min-height:36px;padding:5px 14px;border:1px solid var(--c-border);border-radius:var(--r-pill);font-size:13.5px;color:var(--c-text);background:var(--c-bg);white-space:nowrap}
.lang svg{width:15px;height:15px;color:var(--c-muted)}
.lang__caret{color:var(--c-muted);font-size:11px}
.language-menu{position:absolute;right:0;top:calc(100% + 10px);width:190px;list-style:none;margin:0;padding:8px;border:1px solid var(--c-border);border-radius:var(--r-md);background:var(--c-bg);color:var(--c-text);box-shadow:var(--shadow-hair);z-index:5}
.language-menu a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-sm)}
.language-menu a:hover,.language-menu a[aria-current]{background:var(--c-panel);color:var(--c-text)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:1px solid var(--c-border);border-radius:var(--r-pill);background:var(--c-bg);color:var(--c-text)}
.menu-toggle svg{width:20px;height:20px}
.mobile-drawer{position:fixed;z-index:3;top:var(--header-height);left:0;right:0;max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;padding:20px var(--gutter) 28px;background:var(--c-bg);color:var(--c-text);border-bottom:1px solid var(--c-border)}
.mobile-drawer ul{list-style:none;margin:0;padding:0}
.mobile-drawer a{display:flex;align-items:center;gap:12px;width:100%;min-height:48px;padding:12px 14px;border-radius:var(--r-sm)}
.mobile-drawer svg{width:18px;height:18px}
.mobile-drawer a:hover,.mobile-drawer a[aria-current]{background:var(--c-panel);color:var(--c-text)}
.mobile-drawer__languages{margin-top:18px;padding-top:18px;border-top:1px solid var(--c-border)}
.menu-veil{position:fixed;z-index:1;inset:var(--header-height) 0 0;border:0;background:var(--c-panel-2);color:var(--c-text)}
.hero{padding-top:40px;overflow-x:clip}
.hero__top{display:grid;grid-template-columns:1.15fr 1fr;column-gap:56px;align-items:start}
.tagmark{display:inline-flex;align-items:center;gap:9px;min-height:30px;max-width:100%;padding:4px 14px 4px 12px;border:1px solid var(--c-border);border-radius:var(--r-pill);background:var(--c-bg);color:var(--c-muted);font-size:13px}
.tagmark__dot{flex-shrink:0;width:7px;height:7px;border-radius:var(--r-circle);background:var(--c-accent)}
.hero__title{margin:20px 0 0;font-family:var(--f-display);font-weight:var(--weight-normal);font-size:clamp(28px,3.4vw,48px);line-height:1.12;letter-spacing:-.02em;color:var(--c-text)}
.hero__title-line{display:block}
.hero__aside{padding-top:52px}
.lede{margin:0;font-size:16px;line-height:1.72;color:var(--c-muted);max-width:520px}
.lede strong{color:var(--c-text);font-weight:var(--weight-medium)}
.devices{margin-top:16px;display:flex;align-items:center;flex-wrap:wrap;gap:4px 18px}
.devices__label{font-size:12.5px;color:var(--c-muted);margin-right:-4px}
.devices__item{display:inline-flex;align-items:center;gap:6px;min-height:30px;font-size:13.5px;color:var(--c-text);transition:color var(--t-fast),transform var(--t-fast)}
.devices__item svg{width:17px;height:17px;color:var(--c-muted)}
.devices__item:hover{color:var(--c-accent);transform:translateY(-1px)}
.devices__item:hover svg{color:var(--c-accent)}
.devices__store{display:inline-flex;align-items:center;gap:5px;min-height:26px;padding:2px 11px;border-radius:var(--r-pill);border:1px solid var(--c-border-strong);font-size:12.5px;color:var(--c-accent)}
.devices__store:hover{border-color:var(--c-accent)}
.next{margin-top:40px}
.next__rule{border-top:1px solid var(--c-border);padding-top:28px;font-size:13px;color:var(--c-muted)}
.prose{min-width:0;line-height:1.85}
.prose h2{margin-top:64px;margin-bottom:24px}
.prose h3{margin-top:36px}
.prose a{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px}
.prose li+li{margin-top:10px}
.prose img{max-width:100%}
.site-footer{margin-top:var(--section-gap);padding-top:48px;padding-bottom:32px;border-top:1px solid var(--c-border);background:var(--c-bg);color:var(--c-text)}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1.3fr;gap:48px}
.footer-brand p{margin-top:20px;max-width:360px;font-size:14px;color:var(--c-muted)}
.footer-heading{font-size:14px;font-weight:var(--weight-medium);margin:0 0 16px}
.footer-links{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px 20px}
.footer-links li{min-width:0}
.footer-links a{display:inline-block;padding-block:5px;font-size:13px;color:var(--c-muted)}
.footer-links a:hover{color:var(--c-accent)}
.footer-languages{display:flex;flex-wrap:wrap;gap:12px 20px;margin-top:36px}
.footer-languages a{font-size:13px;color:var(--c-muted);padding-block:6px}
.footer-languages a[aria-current]{color:var(--c-accent)}
.footer-bottom{margin-top:24px;padding-top:24px;border-top:1px solid var(--c-border);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px 24px;font-size:12px;color:var(--c-muted)}
.footer-bottom p{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px}
.reveal{opacity:1;transform:none}
.reveal-enabled .reveal:not(.shown){opacity:0;transform:translateY(16px)}
.reveal-enabled .reveal{transition:opacity var(--t-reveal),transform var(--t-reveal)}
.reveal.shown{opacity:1;transform:none}
@media(max-width:1280px){
  .masthead__inner{gap:20px}
  .brand__sub{display:none}
  .header-tools{margin-left:auto}
}
@media(max-width:1279px){
  .mainnav{display:none}
  .menu-toggle{display:inline-flex}
}
@media(min-width:1280px){.mobile-drawer,.menu-veil{display:none!important}}
@media(max-width:1080px){
  .hero__top{grid-template-columns:minmax(0,1fr);row-gap:28px}
  .hero__aside{padding-top:0}
  .footer-grid{gap:28px;grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:768px){
  h1,.hero__title{font-size:clamp(24px,4vw,30px);letter-spacing:-.02em}
  .grid-three{grid-template-columns:minmax(0,1fr)}
  .notice__dev,.notice__sep{display:none}
}
@media(max-width:640px){
  :root{--gutter:20px;--section-gap:140px}
  .wrap,.masthead__inner{padding-inline:var(--gutter)}
  .grid-two,.footer-grid{grid-template-columns:minmax(0,1fr)}
  .card,.panel{padding:22px}
  .brand__sub{display:none}
  .masthead__inner{gap:10px}
  .masthead__inner .brand{flex:1;min-width:0}
  .masthead__inner .brand__name{min-width:0;font-size:14px;line-height:1.25;overflow-wrap:anywhere}
  .lang{padding-inline:10px}
  .header-tools{gap:8px;margin-left:auto}
  .tilt,[data-tilt]{transform:none!important}
  .hero__title-line{white-space:normal}
  .devices{gap:8px 14px}
  .footer-brand{grid-column:auto}
}
@media(max-width:360px){
  .brand{gap:7px}
  .brand__name{font-size:14px}
  .lang{font-size:12px;padding-inline:9px}
  .lang svg{display:none}
  .notice__inner{gap:10px;font-size:12px}
  .notice__cta{font-size:12px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal-enabled .reveal:not(.shown){opacity:1;transform:none}
}