.watch .crumbs{display:flex;gap:12px;flex-wrap:wrap}.watch-heading{padding:27px 0 30px;max-width:1000px}.watch-heading h1{font-size:clamp(26px,3vw,39px);line-height:1.45;letter-spacing:-1px;margin:12px 0 17px}.watch-meta{display:flex;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:12px}.watch-meta a{color:var(--green)}.watch-layout{display:grid;grid-template-columns:minmax(0,1.9fr) minmax(280px,1fr);gap:28px;align-items:start}.player-card{border:1px solid var(--line);border-radius:9px;overflow:hidden;background:#fff8}.screen{aspect-ratio:16/9;position:relative;background:#132019;overflow:hidden}.screen>img,.screen video,.screen iframe,.screen #embed{width:100%;height:100%;position:absolute;inset:0;object-fit:contain;border:0}.screen>img{object-fit:cover}.load-video{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;color:white;background:#12201940;border:0;font-weight:600;text-shadow:0 1px 4px #000}.load-video span{display:grid;place-items:center;background:var(--lime);color:var(--green);width:68px;height:68px;border-radius:50%;font-size:24px;padding-left:4px;text-shadow:none}.captions{position:absolute;bottom:44px;left:5%;right:5%;text-align:center;pointer-events:none;z-index:4;white-space:pre-line;font-size:clamp(12px,1.25vw,18px);line-height:1.6;color:white;text-shadow:0 1px 3px black;background:#000B;padding:5px 10px;border-radius:4px;max-height:40%;overflow:hidden}.audio-cover{position:absolute;inset:0;z-index:5;display:flex;align-items:center;justify-content:center;overflow:hidden}.audio-cover img{width:100%;height:100%;object-fit:cover;filter:brightness(.3) blur(4px)}.audio-cover span{position:absolute;font-size:20px;color:var(--lime)}.player-tools{padding:15px 16px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;border-bottom:1px solid var(--line)}.modes{display:flex;gap:5px}.modes button{border:1px solid var(--line);background:transparent;color:var(--muted);border-radius:4px;padding:7px 10px;font-size:12px}.modes button.active{background:var(--green);border-color:var(--green);color:white}.sound-settings{display:flex;gap:7px;align-items:center}.sound-settings label,.transcript-controls label{font-size:11px;color:var(--muted)}.watch select{background:var(--paper);color:var(--ink);border:1px solid var(--line);padding:5px;border-radius:4px;font-size:12px}.transport{display:flex;align-items:center;gap:9px;padding:15px 16px 3px;font-size:11px}.transport button{border:0;background:var(--lime);color:var(--ink);padding:8px 13px;border-radius:4px;white-space:nowrap;min-width:62px}.transport input{accent-color:var(--green);min-width:0}#seek{flex:1;width:100%}#volume{width:55px}.transport output{white-space:nowrap;min-width:80px;font-variant-numeric:tabular-nums}.seek-label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.volume-label{font-size:11px}.player-status{font-size:12px;line-height:1.7;color:var(--muted);padding:0 17px;margin:12px 0 16px}.player-status.error{color:#9b462d;background:#faf0e4;padding:10px 17px;margin:10px 0 0}.watch-about{padding:28px 0}.watch-about h2{font-size:22px;font-weight:600;margin:8px 0 12px}.watch-about p{font-size:14px;color:#5f6c61;line-height:1.9}.watch-note{font-size:11px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px}.watch-note a{margin-left:10px;color:var(--green)}.transcript-panel{border:1px solid var(--line);border-radius:8px;background:#fff6;padding:20px;min-width:0}.transcript-head{display:flex;justify-content:space-between;align-items:center}.transcript-head h2{font-size:21px;margin:5px 0 13px;font-weight:600}.transcript-head>span{font-size:11px;color:var(--muted)}.transcript-controls{display:flex;align-items:center;gap:7px;flex-wrap:wrap}.follow-label{margin-left:auto;display:flex;align-items:center}.follow-label input{accent-color:var(--green)}#transcript-search{width:100%;padding:9px 12px;margin:15px 0 0;border:1px solid var(--line);border-radius:4px;background:var(--paper);font-size:12px;color:var(--ink)}.transcript-hint{font-size:10px;color:var(--muted);margin:9px 0 12px}.transcript{height:510px;overflow:auto;scrollbar-width:thin;padding-right:5px;overscroll-behavior:contain}.cue{display:grid;grid-template-columns:43px 1fr;width:100%;padding:11px 7px;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;color:var(--ink);gap:7px;border-radius:4px;line-height:1.75;font-size:12px}.cue time{font-variant-numeric:tabular-nums;font-size:10px;color:#839074;padding-top:3px}.cue.active{background:#e5eccd}.cue:hover{background:#e9edde}.cue-zh,.cue-en{display:block}.cue-en{font-size:11px;color:var(--muted);margin-top:4px}.watch-related{padding:30px 0 60px;border-top:1px solid var(--line);margin-top:20px}.watch-related .library-head>a{font-size:12px;color:var(--green)}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}@media(max-width:1000px){.watch-layout{grid-template-columns:minmax(0,1.5fr) minmax(260px,1fr);gap:18px}.player-tools{padding:12px}.transport{flex-wrap:wrap}.sound-settings{flex-wrap:wrap}.transcript-panel{padding:15px}.volume-label,#volume{display:none}}@media(max-width:760px){.watch-layout{grid-template-columns:1fr}.watch-heading{padding:22px 0}.watch-heading h1{font-size:27px}.watch-meta{gap:12px;font-size:11px}.player-tools{gap:10px}.sound-settings{width:100%}.transcript{height:390px}.related-grid{grid-template-columns:1fr}.watch-related .library-head{display:flex;align-items:center}.watch-related h2{font-size:22px}.watch .eyebrow{font-size:10px}.captions{bottom:36px;font-size:12px}.transport{flex-wrap:nowrap;padding:13px 10px 3px;gap:5px}.transport button{padding:7px 9px}.transport output{font-size:10px;min-width:76px}.watch-about{padding:25px 0 15px}.screen{border-radius:0}.watch-note a{display:block;margin:5px 0}.watch-meta a{word-break:break-word}} 
.lecture-notes{border:1px solid var(--line);border-radius:8px;margin:25px 0;background:#fff5}.lecture-notes summary{padding:18px 22px;cursor:pointer;font-weight:600}.lecture-notes>div{padding:0 22px 25px;max-width:950px}.lecture-notes h2{font-size:21px;margin:25px 0 12px}.lecture-notes h3{font-size:17px}.lecture-notes p,.lecture-notes li{font-size:14px;color:var(--muted)}.lecture-notes blockquote{border-left:3px solid var(--green);margin:20px 0;padding:10px 20px;background:#e7eddb}.lecture-notes table{border-collapse:collapse;max-width:100%;font-size:12px}.lecture-notes td,.lecture-notes th{border:1px solid var(--line);padding:8px}