:root{--text:#111a24;--muted:#667582;--line:#dfe6e8;--green:#19bb68}
*{box-sizing:border-box}body{margin:0;background:#f6f8f9;color:var(--text);font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif}
header{height:64px;background:white;border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 24px}
header img{width:170px}main{max-width:820px;margin:36px auto;padding:0 20px}article{background:white;border:1px solid var(--line);border-radius:12px;padding:28px}
h1{font-size:28px;margin:0 0 8px}h2{font-size:17px;margin:26px 0 8px}p,li{color:var(--muted);font-size:14px;line-height:1.65}
a{color:#0b9c76;text-decoration:none}.back{display:inline-block;margin-bottom:14px}
footer{text-align:center;color:#8a97a1;font-size:12px;padding:24px}