*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#1c2b2a;background:#f5f7f6;line-height:1.6}
a{color:#2C504D}header.top{background:#fff;border-bottom:1px solid #e3e8e7;padding:14px 24px;display:flex;align-items:center;gap:16px;position:sticky;top:0;z-index:5}
header.top img{height:26px}header.top .ct{font-weight:600;color:#2C504D;font-size:15px;border-left:1px solid #d5dcdb;padding-left:16px}
header.top .sp{flex:1}header.top button.menu{display:none;background:none;border:1px solid #d5dcdb;border-radius:8px;padding:6px 10px;font:inherit}
.wrap{display:flex;min-height:calc(100vh - 55px)}nav.side{width:320px;flex:none;background:#fff;border-right:1px solid #e3e8e7;padding:18px 0 40px;overflow-y:auto;height:calc(100vh - 55px);position:sticky;top:55px}
nav.side .grp{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#6b7c7a;padding:18px 22px 6px;font-weight:700}
nav.side .sec{font-weight:600;font-size:14px;padding:10px 22px 4px;color:#1c2b2a}nav.side a{display:block;padding:6px 22px 6px 30px;font-size:14px;color:#3d4f4d;text-decoration:none;border-left:3px solid transparent}
nav.side a:hover{background:#f1f5f4}nav.side a.on{background:#e8f0ee;border-left-color:#2C504D;color:#2C504D;font-weight:600}nav.side a .d{color:#8a9997;font-size:12px;margin-left:6px}
main{flex:1;min-width:0;padding:32px 40px 80px;max-width:980px}h1{font-size:28px;line-height:1.25;margin:0 0 6px;color:#12201f}.crumb{font-size:13px;color:#6b7c7a;margin-bottom:18px}
.player{background:#000;border-radius:12px;overflow:hidden;aspect-ratio:16/9;margin:18px 0 26px}.player video{width:100%;height:100%;display:block;background:#000}
.body{background:#fff;border:1px solid #e3e8e7;border-radius:12px;padding:24px 28px}.body p{margin:0 0 12px}.body h2,.body h3,.body h4{margin:22px 0 10px;color:#12201f}.body hr{border:0;border-top:1px solid #e3e8e7;margin:18px 0}
a.file{display:flex;gap:14px;align-items:center;border:1px solid #d5dcdb;border-radius:10px;padding:12px 16px;text-decoration:none;color:#1c2b2a;margin:10px 0;background:#fafcfb}
a.file .ficon{background:#2C504D;color:#fff;font-size:11px;font-weight:700;border-radius:6px;padding:8px 7px}a.file small{display:block;color:#6b7c7a;font-size:12px}
.pn{display:flex;justify-content:space-between;gap:12px;margin-top:28px}.pn a{flex:1;max-width:48%;border:1px solid #d5dcdb;border-radius:10px;padding:12px 16px;text-decoration:none;background:#fff;color:#1c2b2a;font-size:14px}
.pn a small{display:block;color:#6b7c7a;font-size:12px}.pn a.nx{text-align:right;margin-left:auto}
.mod{background:#fff;border:1px solid #e3e8e7;border-radius:12px;margin:14px 0;overflow:hidden}.mod h3{margin:0;padding:14px 20px;font-size:16px;background:#f1f5f4;border-bottom:1px solid #e3e8e7}
.mod a{display:flex;justify-content:space-between;padding:10px 20px;border-bottom:1px solid #eef2f1;text-decoration:none;color:#1c2b2a;font-size:15px}.mod a:last-child{border-bottom:0}.mod a:hover{background:#f7faf9}.mod a span{color:#8a9997;font-size:13px}
.grp-h{margin:34px 0 4px;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:#6b7c7a}
.btn{display:inline-block;background:#2C504D;color:#fff;border:0;border-radius:10px;padding:12px 22px;font-weight:600;font-size:15px;font-family:inherit;text-decoration:none;cursor:pointer}
.center{max-width:460px;margin:9vh auto;background:#fff;border:1px solid #e3e8e7;border-radius:16px;padding:36px}.center img{height:30px;margin-bottom:22px}
.center input{width:100%;padding:12px 14px;border:1px solid #c9d2d0;border-radius:10px;font:inherit;margin:8px 0 16px}.err{color:#b3261e;font-size:14px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;max-width:900px;margin:30px auto;padding:0 20px}.card{background:#fff;border:1px solid #e3e8e7;border-radius:14px;padding:26px;text-decoration:none;color:#1c2b2a}
.card h2{margin:0 0 8px;font-size:19px;color:#2C504D}.card p{margin:0;color:#56706d;font-size:14px}
@media (max-width:860px){nav.side{display:none;position:fixed;top:55px;left:0;right:0;width:auto;z-index:4;height:calc(100vh - 55px)}nav.side.open{display:block}header.top button.menu{display:block}main{padding:22px 16px 60px}header.top .ct{display:none}}