:root{--y:#f4cc47;--y2:#fff6d6;--ink:#1a1a1a;--mute:#5b5b5b;--line:#ececec;--bg:#fff}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"IBM Plex Sans Thai","Noto Sans Thai",system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px}
a{color:inherit;text-decoration-color:var(--y);text-decoration-thickness:2px;text-underline-offset:3px}
header{border-bottom:1px solid var(--line)}
.wrap{max-width:880px;margin:0 auto;padding:0 20px}
.bar{display:flex;align-items:center;justify-content:space-between;height:68px}
.bar img{height:38px;display:block}
nav a{margin-left:18px;font-size:15px;text-decoration:none;color:var(--mute)}
nav a:hover{color:var(--ink)}
.hero{padding:72px 0 56px}
.hero h1{font-size:clamp(30px,5vw,46px);line-height:1.2;margin:0 0 16px;letter-spacing:-.01em}
.hero h1 span{background:linear-gradient(transparent 62%,var(--y) 62%)}
.hero p{font-size:19px;color:var(--mute);max-width:620px;margin:0 0 28px}
.btn{display:inline-block;background:var(--ink);color:#fff;text-decoration:none;padding:12px 22px;border-radius:10px;font-weight:600}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;padding:8px 0 64px}
.card{border:1px solid var(--line);border-radius:14px;padding:20px 22px;background:#fff}
.card h3{margin:0 0 6px;font-size:17px}
.card p{margin:0;color:var(--mute);font-size:15px}
.card b{display:inline-block;background:var(--y2);border-radius:6px;padding:0 8px;margin-bottom:10px;font-size:13px}
main.doc{padding-top:48px;padding-bottom:64px}
.doc h1{font-size:32px;line-height:1.25;margin:0 0 4px}
.doc .meta{color:var(--mute);font-size:14px;margin-bottom:32px}
.doc h2{font-size:21px;margin:36px 0 8px;padding-top:4px}
.doc h3{font-size:17px;margin:22px 0 4px}
.doc ul,.doc ol{padding-left:22px}
.doc li{margin:4px 0}
.note{background:var(--y2);border-radius:12px;padding:14px 18px;margin:20px 0}
.lang{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;font-size:14px;margin-bottom:24px}
.lang a{padding:4px 14px;text-decoration:none;color:var(--mute)}
.lang a.on{background:var(--ink);color:#fff}
hr{border:0;border-top:1px solid var(--line);margin:48px 0}
footer{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--mute);font-size:14px}
footer .row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}
footer a{margin-right:16px}
@media (max-width:640px){nav{display:none}.grid{grid-template-columns:1fr}.hero{padding:48px 0 36px}}