:root{--bg:#f6f9fc;--card:#fff;--text:#16212e;--muted:#5b6b7c;--brand:#0b6bcb;--brand2:#0a4f99;--line:#dde5ee;--warn:#fff4cc;--warnt:#6b5200}
@media(prefers-color-scheme:dark){:root{--bg:#0f1720;--card:#16212e;--text:#e8eef5;--muted:#9fb0c2;--brand:#5aa9ff;--brand2:#8cc2ff;--line:#26364a;--warn:#3a3210;--warnt:#f3df8a}}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font:16px/1.7 "Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--brand)}a:hover{color:var(--brand2)}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
header.top{background:var(--card);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:14px 20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--text);text-decoration:none}
.brand img{width:36px;height:36px;border-radius:8px}
nav a{margin-left:16px;text-decoration:none;font-size:15px}
.hero{padding:56px 0 36px;text-align:center}
.hero img{width:96px;height:96px;border-radius:20px}
.hero h1{font-size:clamp(28px,5vw,42px);margin:16px 0 8px}
.hero p{color:var(--muted);max-width:620px;margin:0 auto}
.btn{display:inline-block;margin-top:20px;padding:10px 20px;border-radius:10px;background:var(--brand);color:#fff;text-decoration:none;font-weight:600}
.btn:hover{background:var(--brand2);color:#fff}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px 24px;margin:18px 0}
.card h2{margin-top:0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.grid .card{margin:0}
main h1{font-size:30px;margin:36px 0 4px}
main h2{font-size:21px;margin:30px 0 8px}
main h3{font-size:17px;margin:20px 0 4px}
.meta{color:var(--muted);font-size:14px}
table{width:100%;border-collapse:collapse;margin:10px 0;font-size:15px}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--bg)}
.ph{background:var(--warn);color:var(--warnt);padding:0 5px;border-radius:4px;font-weight:600}
.note{background:var(--warn);color:var(--warnt);border-radius:10px;padding:12px 16px;margin:16px 0}
footer{border-top:1px solid var(--line);margin-top:48px;padding:22px 0;color:var(--muted);font-size:14px;text-align:center}
footer a{margin:0 8px}