@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');
:root{--blue:#0079d2;--indigo:#5b6cf0;--ink:#0c1626;--ink-2:#46566b;--ink-3:#93a1b5;--bg:#f6f9fd;--card:#fff;--line:#e6edf6;--grad:linear-gradient(120deg,#0079d2,#5b6cf0)}
*{box-sizing:border-box;margin:0}
body{font-family:'Plus Jakarta Sans',-apple-system,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7;font-size:16px}
.wrap{max-width:800px;margin:0 auto;padding:0 1.5rem}
header{border-bottom:1px solid var(--line);background:#f6f9fdcc;backdrop-filter:blur(10px);position:sticky;top:0;z-index:5}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:800;font-size:1.08rem;text-decoration:none;color:var(--ink)}
.mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--grad);color:#fff;font-weight:800}
.brand-logo{width:32px;height:32px;object-fit:contain;display:block}
.brand .sub{color:var(--ink-3);font-weight:600;font-size:.86rem}
.nav a.back{color:var(--blue);font-weight:600;text-decoration:none;font-size:.9rem}
main{padding:3rem 0 4rem}
h1{font-size:2rem;letter-spacing:-.03em;margin-bottom:.4rem}
.updated{color:var(--ink-3);font-size:.88rem;margin-bottom:2.2rem}
h2{font-size:1.2rem;letter-spacing:-.02em;margin:2.2rem 0 .7rem}
h3{font-size:1rem;margin:1.3rem 0 .4rem}
p,li{color:var(--ink-2)}
ul{margin:.5rem 0 .5rem 1.2rem}
li{margin:.3rem 0}
a{color:var(--blue)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:1.2rem 1.4rem;margin:1.2rem 0}
.card p{margin:.15rem 0;color:var(--ink)}
strong{color:var(--ink)}
footer{border-top:1px solid var(--line);padding:1.6rem 0;color:var(--ink-3);font-size:.82rem}
footer a{color:var(--ink-2)}