:root{--ink: #15172a;--brand: #4f46e5;--brand-dark: #342bb8;--brand-tint: #eef0ff;--bg: #f6f6fb;--card-bg: #ffffff;--text: #2b2e43;--muted: #6b7085;--border: #e4e4f0;--green: #15803d;--green-bg: #e7f6ec;--yellow: #b45309;--yellow-bg: #fef3c7;--red: #dc2626;--red-bg: #fdeceb;--font: "IBM Plex Sans Thai", "IBM Plex Sans", "Segoe UI", sans-serif;--mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;--product-detail-width: 60%}*{box-sizing:border-box}body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}.page-shell{display:flex;flex-direction:column;min-height:100vh}.page-shell>main{flex:1 0 auto}.page-shell>.site-footer{flex-shrink:0}h1,h2,h3,h4{color:var(--ink);font-weight:700;line-height:1.3}h1{font-size:32px}h2{font-size:22px}h3{font-size:17px}a{color:var(--brand);text-decoration:none}a:hover{color:var(--brand-dark)}code{font-family:var(--mono)}.container{max-width:1120px;margin:0 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