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span[data-off]{color:#ff4a4a;font-weight:600;white-space:nowrap}.dl-off-i{display:inline-flex;width:22px;height:22px;align-items:center;justify-content:center;border-radius:50%;background:#1f1f1f;color:#ff1f1f;margin-right:4px}.dl-off-a{color:#ff4a4a;font-weight:600;text-decoration:none;white-space:nowrap}.dl-off-a:hover{text-decoration:underline}.dl-pwa{margin:14px auto 0;max-width:820px;color:#9a9a9a;font-size:13px}.tut-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px;margin-top:44px;align-items:start}.tut-player{position:relative;aspect-ratio:16/9;border-radius:var(--r);overflow:hidden;background:#0a0a0a;border:1px solid #1a1a1a;box-shadow:0 30px 80px -40px rgba(0,0,0,.9)}.tut-player video{width:100%;height:100%;object-fit:contain;background:#0a0a0a}.tut-off{position:absolute;left:0;right:0;bottom:0;padding:10px 14px;background:rgba(10,10,10,.85);color:var(--mu);font-size:14px;text-align:center}.tut-credit{margin-top:12px;color:var(--mu);font-size:13px}.tut-credit a{color:#d7d7dc}.tut-chaps{padding:16px 10px 10px;background:#121212;border-color:#1a1a1a}.tut-chaps-h{font:700 12px var(--hfont);letter-spacing:.12em;text-transform:uppercase;color:var(--mu);padding:0 10px 8px}.tut-chaps ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}.chap{display:flex;align-items:center;gap:12px;width:100%;text-align:left;background:0 0;border:1px solid transparent;border-radius:12px;padding:9px 10px;color:#e6e6ea;font:500 14.5px/1.25 var(--bfont);cursor:pointer;transition:background .2s,border-color .2s,box-shadow .2s}.chap:hover{background:#1a1a1a}.chap-t{flex:0 0 auto;min-width:42px;font:600 12.5px/1 var(--hfont);font-variant-numeric:tabular-nums;color:var(--mu);background:#1a1a1a;border-radius:999px;padding:5px 8px;text-align:center}.chap.on{background:rgba(255,31,31,.08);border-color:rgba(255,31,31,.55);box-shadow:0 0 18px -4px rgba(255,31,31,.45);color:#fff}.chap.on .chap-t{background:var(--red);color:#fff}@media (max-width:960px){.tut-grid{grid-template-columns:1fr}.tut-chaps ol{display:grid;grid-template-columns:1fr 1fr;gap:4px}}@media (max-width:560px){.tut-grid{margin-top:30px;gap:16px}.tut-player{border-radius:14px}.chap{font-size:13.5px;padding:8px;gap:8px}.chap-t{min-width:38px;font-size:12px;padding:4px 6px}}