:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#17211e;background:#f4f5f1;line-height:1.65}
*{box-sizing:border-box}
body{margin:0}
main{width:min(860px,calc(100% - 32px));margin:48px auto;background:#fff;border:1px solid #dce3df;border-radius:24px;padding:clamp(24px,5vw,56px);box-shadow:0 24px 70px rgba(24,45,38,.08)}
a{color:#136f55}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:#10211c;text-decoration:none}
.mark{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:#e7f4ef;color:#136f55}
h1{font-size:clamp(2rem,5vw,3rem);line-height:1.05;margin:32px 0 12px}
h2{margin-top:32px;font-size:1.25rem}
p,li{color:#52615c}
.meta{font-size:.9rem;color:#71807b}
.notice{padding:16px 18px;border-radius:14px;background:#edf7f3;border-left:4px solid #136f55}
footer{margin-top:40px;padding-top:20px;border-top:1px solid #e4e9e6;display:flex;gap:16px;flex-wrap:wrap;font-size:.9rem}
html[data-theme='dark']{color-scheme:dark;color:#e7f0eb;background:#0d1512}
html[data-theme='dark'] main{background:#151f1b;border-color:#2b3934;box-shadow:0 24px 70px rgba(0,0,0,.3)}
html[data-theme='dark'] .brand{color:#edf5f1}
html[data-theme='dark'] .mark{background:#19372d;color:#65c8a3}
html[data-theme='dark'] a{color:#65c8a3}
html[data-theme='dark'] p,html[data-theme='dark'] li{color:#b4c2bb}
html[data-theme='dark'] .meta{color:#93a29b}
html[data-theme='dark'] .notice{color:#c7d6cf;background:#183129}
html[data-theme='dark'] footer{border-color:#2b3934}