:root{--bg:#f4f6fb;--card:#fff;--ink:#16202f;--muted:#566377;--line:#dde3ee;--acc:#2f5be7;--chip:#eef2ff}
@media (prefers-color-scheme:dark){:root{--bg:#14161c;--card:#1e222b;--ink:#eef1f6;--muted:#aab3c2;--line:#323846;--acc:#8fb0ff;--chip:#273049}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.dp-wrap{max-width:900px;margin:0 auto;padding:22px 16px 60px}
.dp-top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.dp-top img{height:56px;width:auto;background:#fff;border-radius:10px;padding:4px 8px}
.dp-back{color:var(--acc);font-weight:650;text-decoration:none;border:1px solid var(--line);border-radius:10px;padding:8px 14px;background:var(--card)}
.dp-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px 24px;margin-top:16px}
h1{font-size:1.9rem;margin:6px 0 4px;line-height:1.2}
h2{font-size:1.25rem;margin:0 0 8px}
h3{font-size:1.02rem;margin:16px 0 4px}
p{margin:8px 0}
ul{margin:6px 0 8px;padding-left:22px}li{margin:3px 0}
a{color:var(--acc)}
.muted{color:var(--muted)}
.dp-toc{columns:2;column-gap:28px;margin:0;padding-left:20px}
.dp-toc li{break-inside:avoid}
.dp-box{background:var(--chip);border-radius:12px;padding:12px 16px;margin:12px 0}
.dp-switch{margin-top:18px;text-align:center;font-size:.95rem}
table{width:100%;border-collapse:collapse;margin:8px 0;font-size:.95rem}
th,td{border-top:1px solid var(--line);padding:8px 8px;text-align:left;vertical-align:top}
th{color:var(--muted);font-weight:650}
@media (max-width:640px){.dp-toc{columns:1}.dp-card{padding:18px 16px}table,thead,tbody,tr,th,td{display:block}thead{display:none}td{border:0;padding:2px 0}tr{border-top:1px solid var(--line);padding:8px 0}}
@media print{body{background:#fff;color:#000}.dp-back{display:none}.dp-card{border:0;padding:0}}