:root{--blue:#0875ef;--ink:#092541;--muted:#65798d;--line:#dce7f0;--bg:#f5f9fc}
*{box-sizing:border-box}body{margin:0;font-family:Arial,"Helvetica Neue",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--blue)}.wrap{width:min(900px,calc(100% - 32px));margin:42px auto}.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:34px;box-shadow:0 12px 35px rgba(7,40,69,.07)}
.back{display:inline-block;margin-bottom:18px;font-weight:700;text-decoration:none}.meta{color:var(--muted);font-size:13px}.operator{background:#eef7ff;border-radius:12px;padding:16px 18px;margin:18px 0}
h1{font-size:34px;line-height:1.15;margin:0 0 8px}h2{font-size:20px;margin-top:28px}p,li{font-size:14px}ul{padding-left:22px}.notice{background:#fff8e7;border:1px solid #f1dfab;border-radius:10px;padding:12px 14px;font-size:13px}footer{margin-top:26px;color:var(--muted);font-size:12px}
@media(max-width:600px){.wrap{margin:18px auto}.card{padding:22px}h1{font-size:28px}}