.dh-player{box-sizing:border-box}.dh-player *,.dh-player :after,.dh-player :before{box-sizing:inherit}.dh-player button,.dh-player input,.dh-player select,.dh-player summary,.dh-player textarea{font:inherit;color:inherit}.dh-player{--bg:#f6f7f9;--panel:#ffffff;--ink:#14233b;--muted:#55657d;--line:#dfe4ec;--accent:#f7941e;--accent-ink:#14233b;--accent-soft:#fff1dc;--focus:#1d4ed8;--ok:#15803d;--ok-soft:#e7f6ec;--bad:#b91c1c;--bad-soft:#fdecec;--shadow:0 10px 30px -14px rgba(20,35,59,.28);--radius:14px;--side:344px}[data-theme=dark] .dh-player{--bg:#0d1626;--panel:#15213a;--ink:#eef2f9;--muted:#a8b4c8;--line:#263756;--accent:#f7941e;--accent-ink:#0d1626;--accent-soft:#3a2a12;--focus:#8ab4ff;--ok:#4ade80;--ok-soft:#12301f;--bad:#f87171;--bad-soft:#3a1717;--shadow:0 10px 30px -14px rgba(0,0,0,.6)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .dh-player{--bg:#0d1626;--panel:#15213a;--ink:#eef2f9;--muted:#a8b4c8;--line:#263756;--accent:#f7941e;--accent-ink:#0d1626;--accent-soft:#3a2a12;--focus:#8ab4ff;--ok:#4ade80;--ok-soft:#12301f;--bad:#f87171;--bad-soft:#3a1717;--shadow:0 10px 30px -14px rgba(0,0,0,.6)}}.dh-player button{font:inherit;color:inherit;cursor:pointer}.dh-player :focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:6px}.dh-player .skip{position:absolute;left:-999px;top:8px;background:var(--panel);padding:8px 12px;z-index:50;border-radius:8px}.dh-player .skip:focus{left:8px}.dh-player [hidden]{display:none!important}.dh-player .app{min-height:100%;display:flex;flex-direction:column}.dh-player .topbar{display:flex;align-items:center;gap:14px;padding:10px 20px;background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:64px;z-index:20}.dh-player .brand{min-width:0;flex:1}.dh-player .brand-title{font-weight:800;letter-spacing:-.01em;font-size:18px}.dh-player .brand-sub,.dh-player .brand-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.dh-player .brand-sub{color:var(--muted);font-size:13px}.dh-player .topbar-right{display:flex;align-items:center;gap:14px}.dh-player .overall{display:flex;align-items:center;gap:10px}.dh-player .ring{--p:0;width:40px;height:40px;border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:800;background:conic-gradient(var(--accent) calc(var(--p) * 1%),var(--line) 0);position:relative}.dh-player .ring:before{content:"";position:absolute;inset:5px;border-radius:50%;background:var(--panel)}.dh-player .ring span{position:relative}.dh-player .overall-text{font-size:13px;line-height:1.25;color:var(--muted)}.dh-player .overall-text strong{display:block;color:var(--ink);font-size:15px}.dh-player .iconbtn{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--panel);display:grid;place-items:center}.dh-player .iconbtn svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.dh-player .iconbtn.menu{display:none}.dh-player .primary{background:var(--accent);color:var(--accent-ink);border:0;border-radius:10px;padding:10px 16px;font-weight:800}.dh-player .primary:hover{filter:brightness(1.05)}.dh-player .ghost[disabled],.dh-player .primary[disabled]{opacity:.45;cursor:not-allowed}.dh-player .primary.wide{width:100%}.dh-player .ghost{background:transparent;border:1px solid var(--line);border-radius:10px;padding:9px 14px;font-weight:700}.dh-player .ghost[aria-pressed=true]{background:var(--ok-soft);border-color:var(--ok);color:var(--ok)}.dh-player .layout{display:grid;grid-template-columns:var(--side) minmax(0,1fr);flex:1;min-height:0}.dh-player .sidebar{background:var(--panel);border-right:1px solid var(--line);padding:16px;overflow:auto;position:sticky;top:125px;height:calc(100vh - 125px);scrollbar-width:thin;scrollbar-color:transparent transparent}.dh-player .sidebar:focus-within,.dh-player .sidebar:hover{scrollbar-color:var(--line) transparent}.dh-player .sidebar::-webkit-scrollbar{width:6px}.dh-player .sidebar::-webkit-scrollbar-thumb{background:transparent;border-radius:3px}.dh-player .sidebar:focus-within::-webkit-scrollbar-thumb,.dh-player .sidebar:hover::-webkit-scrollbar-thumb{background:var(--line)}.dh-player .pack-label{font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}.dh-player .seg{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin-bottom:12px}.dh-player .seg button{border:0;background:transparent;padding:8px 6px;font-size:13px;font-weight:700}.dh-player .seg button[aria-checked=true]{background:var(--accent-soft);color:var(--ink);box-shadow:inset 0 -3px 0 var(--accent)}.dh-player .outline{margin-top:14px}.dh-player .mod{border:1px solid var(--line);border-radius:12px;margin-bottom:10px;overflow:hidden}.dh-player .mod-head{width:100%;display:flex;align-items:center;gap:10px;text-align:left;background:transparent;border:0;padding:12px}.dh-player .mod-head .chev{transition:transform .15s;width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2.4;flex:none}.dh-player .mod-head[aria-expanded=true] .chev{transform:rotate(90deg)}.dh-player .mod-title{flex:1;font-weight:800}.dh-player .mod-count{color:var(--muted);font-size:12px;font-weight:700}.dh-player .mod-bar{height:3px;background:var(--line)}.dh-player .mod-bar i{display:block;height:100%;background:var(--accent);width:0}.dh-player .lessons{list-style:none;margin:0;padding:0}.dh-player .lesson{width:100%;display:grid;grid-template-columns:24px 1fr auto;gap:10px;align-items:start;text-align:left;border:0;background:transparent;padding:10px 12px;border-top:1px solid var(--line)}.dh-player .lesson:hover{background:var(--bg)}.dh-player .lesson[aria-current=true]{background:var(--accent-soft);box-shadow:inset 4px 0 0 var(--accent)}.dh-player .lesson .st{width:22px;height:22px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;margin-top:1px;font-size:12px}.dh-player .lesson.done .st{background:var(--ok);border-color:var(--ok);color:#fff}.dh-player .lesson.playing .st{border-color:var(--accent)}.dh-player .lesson.soon{color:var(--muted)}.dh-player .lesson-title{font-weight:700;line-height:1.3}.dh-player .lesson-meta{display:flex;gap:8px;align-items:center;font-size:12px;color:var(--muted);margin-top:2px;flex-wrap:wrap}.dh-player .badge{font-size:10px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;border-radius:999px;padding:1px 8px;border:1px solid var(--line)}.dh-player .badge.us{border-color:#93b4f8;color:#1d4ed8;background:rgba(29,78,216,.08)}[data-theme=dark] .dh-player .badge.us{color:#8ab4ff;border-color:#3b5aa8}.dh-player .badge.soon{color:var(--muted)}.dh-player .lesson-len{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;padding-top:2px}.dh-player .verified{margin-top:16px;padding:12px;border:1px dashed var(--line);border-radius:12px;font-size:12.5px;color:var(--muted)}.dh-player .verified strong{color:var(--ink)}.dh-player .main{padding:20px 24px 60px;max-width:1180px;width:100%;margin:0 auto;outline:none}.dh-player .player-wrap{margin-bottom:18px}.dh-player .stage{position:relative;background:#000;border-radius:var(--radius);overflow:hidden;aspect-ratio:16/9;box-shadow:var(--shadow);-webkit-user-select:none;-moz-user-select:none;user-select:none;outline:none}.dh-player .stage video{width:100%;height:100%;display:block;background:#000;-o-object-fit:contain;object-fit:contain}.dh-player .stage:fullscreen{border-radius:0;aspect-ratio:auto}.dh-player .stage video::cue{background:rgba(0,0,0,.78);color:#fff;font-size:1.15em}.dh-player .bigplay{position:absolute;inset:0;margin:auto;width:84px;height:84px;border-radius:50%;border:0;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;box-shadow:0 12px 32px rgba(0,0,0,.45);transition:transform .15s,opacity .2s}.dh-player .bigplay:hover{transform:scale(1.06)}.dh-player .bigplay svg{width:36px;height:36px;fill:currentColor;margin-left:4px}.dh-player .stage.playing .bigplay,.dh-player .toast{opacity:0;pointer-events:none}.dh-player .toast{position:absolute;left:50%;top:16px;transform:translateX(-50%);background:rgba(0,0,0,.75);color:#fff;padding:6px 14px;border-radius:999px;font-size:14px;font-weight:700;transition:opacity .2s}.dh-player .toast.show{opacity:1}.dh-player .controls{position:absolute;left:0;right:0;bottom:0;padding:28px 14px 10px;color:#fff;background:linear-gradient(transparent,rgba(0,0,0,.78));transition:opacity .25s}.dh-player .stage.idle.playing .controls{opacity:0;pointer-events:none}.dh-player .stage.idle.playing{cursor:none}.dh-player .seek{position:relative;height:22px;display:flex;align-items:center}.dh-player .seek .track{position:absolute;left:0;right:0;height:5px;border-radius:3px;background:rgba(255,255,255,.3)}.dh-player .seek .buf,.dh-player .seek .played{position:absolute;left:0;height:5px;border-radius:3px;width:0}.dh-player .seek .buf{background:rgba(255,255,255,.45)}.dh-player .seek .played{background:var(--accent)}.dh-player .seek .tick{position:absolute;top:50%;width:3px;height:11px;transform:translate(-50%,-50%);background:rgba(255,255,255,.85);border-radius:2px;pointer-events:none}.dh-player .seek input{position:absolute;inset:0;width:100%;margin:0;opacity:0;cursor:pointer;height:22px}.dh-player .seek .thumb{position:absolute;top:50%;width:14px;height:14px;margin-left:-7px;margin-top:-7px;border-radius:50%;background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.5);pointer-events:none;left:0}.dh-player .seek .tip{position:absolute;bottom:26px;transform:translateX(-50%);background:rgba(0,0,0,.85);color:#fff;font-size:12px;font-weight:700;padding:3px 8px;border-radius:6px;white-space:nowrap;pointer-events:none;opacity:0}.dh-player .seek:hover .tip{opacity:1}.dh-player .row{display:flex;align-items:center;gap:4px}.dh-player .row .sp{flex:1}.dh-player .cbtn{background:transparent;border:0;color:#fff;width:40px;height:40px;border-radius:10px;display:grid;place-items:center;position:relative}.dh-player .cbtn:hover{background:rgba(255,255,255,.16)}.dh-player .cbtn svg{width:22px;height:22px;fill:currentColor}.dh-player .cbtn.stroke svg{fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.dh-player .cbtn[aria-pressed=true]:after{content:"";position:absolute;bottom:4px;left:12px;right:12px;height:3px;background:var(--accent);border-radius:2px}.dh-player .cbtn.txt{width:auto;padding:0 10px;font-size:14px;font-weight:800}.dh-player .time{font-size:13px;font-variant-numeric:tabular-nums;padding:0 8px;white-space:nowrap}.dh-player .vol{width:78px;accent-color:var(--accent)}.dh-player .menu-pop{position:absolute;right:0;bottom:46px;background:rgba(15,20,32,.96);border-radius:10px;padding:6px;min-width:120px;box-shadow:0 10px 30px rgba(0,0,0,.5)}.dh-player .menu-pop button{display:block;width:100%;text-align:left;background:transparent;border:0;color:#fff;padding:7px 10px;border-radius:6px;font-size:14px}.dh-player .menu-pop button:hover{background:rgba(255,255,255,.14)}.dh-player .menu-pop button[aria-checked=true]{color:var(--accent);font-weight:800}.dh-player .endcard{position:absolute;inset:0;background:rgba(8,12,22,.88);color:#fff;display:grid;place-items:center;text-align:center;padding:24px}.dh-player .endcard h3{margin:6px 0 4px;font-size:24px}.dh-player .endcard p{margin:0 0 16px;color:#cbd5e5}.dh-player .endcard .btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.dh-player .endcard .ghost{color:#fff;border-color:rgba(255,255,255,.4)}.dh-player .soon-card{aspect-ratio:16/9;border-radius:var(--radius);display:grid;place-items:center;text-align:center;padding:28px;color:#fff;box-shadow:var(--shadow);background:radial-gradient(900px 400px at 85% -10%,rgba(247,148,30,.4),transparent 70%),linear-gradient(160deg,#14233b,#0d1626)}.dh-player .soon-card h2{margin:10px 0 6px;font-size:26px}.dh-player .soon-card p{color:#cbd5e5;max-width:520px;margin:0 auto}.dh-player .soon-card .badge{border-color:rgba(255,255,255,.4);color:#fff}.dh-player .lesson-head h1{font-size:28px;letter-spacing:-.02em;line-height:1.2;margin:4px 0 12px}.dh-player .crumbs{font-size:13px;color:var(--muted);font-weight:700}.dh-player .lesson-actions{display:flex;gap:10px;flex-wrap:wrap}.dh-player .tabs-wrap{margin-top:22px}.dh-player .tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);overflow-x:auto}.dh-player .tabs button{background:transparent;border:0;padding:12px 14px;font-weight:800;color:var(--muted);border-bottom:3px solid transparent;white-space:nowrap}.dh-player .tabs button[aria-selected=true]{color:var(--ink);border-bottom-color:var(--accent)}.dh-player .panel{background:var(--panel);border:1px solid var(--line);border-top:0;border-radius:0 0 var(--radius) var(--radius);padding:22px}.dh-player .panel ul.plain{padding-left:20px;margin:6px 0 18px}.dh-player .chapters{list-style:none;padding:0;margin:8px 0 18px;display:grid;gap:6px}.dh-player .chapters button{width:100%;display:flex;gap:12px;text-align:left;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:9px 12px}.dh-player .chapters .t{font-variant-numeric:tabular-nums;font-weight:800;color:var(--muted);min-width:44px}.dh-player .chapters button.now{border-color:var(--accent);background:var(--accent-soft)}.dh-player .cue-list{max-height:420px;overflow:auto;display:grid;gap:4px}.dh-player .cue{display:flex;gap:12px;text-align:left;width:100%;background:transparent;border:0;border-radius:8px;padding:8px 10px}.dh-player .cue .t{font-variant-numeric:tabular-nums;color:var(--muted);font-weight:800;min-width:44px}.dh-player .cue.now{background:var(--accent-soft)}.dh-player .notes textarea{width:100%;min-height:170px;border:1px solid var(--line);border-radius:10px;padding:12px;background:var(--bg);color:var(--ink);font:inherit;resize:vertical}.dh-player .notes .hint{color:var(--muted);font-size:13px;margin-top:6px}.dh-player .res a{display:flex;gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;margin-bottom:8px;color:var(--ink);text-decoration:none;font-weight:700}.dh-player .res a:hover{background:var(--bg)}.dh-player .quiz .q{border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:14px}.dh-player .quiz .q p{font-weight:800;margin:0 0 8px}.dh-player .quiz label{display:flex;gap:10px;align-items:flex-start;padding:8px 10px;border-radius:8px;cursor:pointer}.dh-player .quiz label:hover{background:var(--bg)}.dh-player .quiz label.right{background:var(--ok-soft)}.dh-player .quiz label.wrong{background:var(--bad-soft)}.dh-player .quiz .why{margin:8px 0 0;font-size:14px;color:var(--muted)}.dh-player .quiz .score{font-weight:800;margin:6px 0 12px}.dh-player .empty{color:var(--muted)}.dh-player .modal{background:rgba(8,12,22,.6);padding:20px}.dh-player .modal-card{padding:20px 22px;max-width:460px;width:100%;box-shadow:var(--shadow)}.dh-player .modal-head{display:flex;justify-content:space-between;align-items:center}.dh-player .modal-head h2{margin:0;font-size:18px}.dh-player .keys{display:grid;grid-template-columns:auto 1fr;gap:8px 16px;margin:14px 0 0}.dh-player .keys dt{white-space:nowrap}.dh-player .keys dd{margin:0;color:var(--muted)}.dh-player kbd{background:var(--bg);border:solid var(--line);border-width:1px 1px 2px;border-radius:6px;padding:1px 7px;font:700 12px ui-monospace,Menlo,Consolas,monospace}@media (max-width:920px){.dh-player .layout{grid-template-columns:minmax(0,1fr)}.dh-player .main{min-width:0}.dh-player .iconbtn.menu{display:grid}.dh-player .sidebar{position:fixed;left:0;top:64px;bottom:0;width:min(88vw,360px);z-index:30;transform:translateX(-100%);transition:transform .2s;height:auto;box-shadow:var(--shadow)}.dh-player .sidebar.open{transform:none}.dh-player .overall-text{display:none}.dh-player .main{padding:14px 14px 50px}.dh-player .lesson-head h1{font-size:22px}.dh-player .vol{display:none}}@media (max-width:520px){.dh-player .controls{padding:24px 8px 6px}.dh-player .cbtn{width:34px;height:36px}.dh-player .cbtn.txt{padding:0 6px}.dh-player .time{padding:0 4px;font-size:12px}.dh-player .cbtn[aria-label="Picture in picture"],.dh-player .cbtn[aria-label^=Back],.dh-player .cbtn[aria-label^=Forward]{display:none}.dh-player .bigplay{width:64px;height:64px}.dh-player .topbar{padding:8px 12px;gap:10px}.dh-player .lesson-actions .ghost,.dh-player .lesson-actions .primary{flex:1 1 auto}}.dh-player .country{width:100%;padding:9px 10px;border-radius:10px;border:1px solid var(--line);background:var(--panel);color:var(--ink);font:inherit;font-weight:700}.dh-player .hint{font-size:12px;color:var(--muted);margin:6px 0 12px;line-height:1.35}.dh-player .lesson-group{padding:8px 12px 4px;font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);border-top:1px solid var(--line);background:var(--bg)}.dh-player .lesson-group:first-child{border-top:0}.dh-player .watch{display:block;margin-bottom:18px}.dh-player .watch.with-rail{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:18px;align-items:start}.dh-player .watch .player-wrap{margin-bottom:0}.dh-player .rail{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px;overflow:auto;box-shadow:var(--shadow)}.dh-player .rail-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px}.dh-player .rail-eyebrow{font-weight:800;letter-spacing:.08em;text-transform:uppercase}.dh-player .rail-eyebrow,.dh-player .rail-len{font-size:12px;color:var(--muted)}.dh-player .drawer ol,.dh-player .rail ol{list-style:none;margin:0;padding:0;display:grid;gap:6px}.dh-player .drawer button,.dh-player .rail button{width:100%;display:flex;gap:10px;align-items:baseline;text-align:left;padding:9px 12px;border-radius:12px;border:1px solid var(--line);background:var(--bg);cursor:pointer;transition:border-color .15s,background .15s}.dh-player .drawer button:hover,.dh-player .rail button:hover{border-color:var(--accent)}.dh-player .drawer button .t,.dh-player .rail button .t{font:700 12px ui-monospace,Consolas,monospace;color:var(--muted);min-width:36px}.dh-player .rail button .lbl{font-weight:700}.dh-player .rail button.seen .lbl{color:var(--muted)}.dh-player .drawer button.now,.dh-player .rail button.now{border-color:var(--accent);background:var(--accent-soft)}.dh-player .rail button.now .t{color:var(--accent-text,#b45309)}.dh-player .chip-row{display:none;gap:8px;overflow-x:auto;padding:2px 0 14px;scrollbar-width:thin}.dh-player .chip-row .chip{flex:none;display:inline-flex;gap:8px;align-items:baseline;border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:7px 14px;font-weight:700;font-size:14px;cursor:pointer}.dh-player .chip-row .chip .t{font:700 12px ui-monospace,Consolas,monospace;color:var(--muted)}.dh-player .chip-row .chip.now{border-color:var(--accent);background:var(--accent-soft)}.dh-player .chaplabel{font-size:13px;font-weight:700;color:#fff;opacity:.9;padding-left:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:34%}.dh-player .drawer{position:absolute;top:0;right:0;bottom:58px;width:min(320px,82%);background:rgba(10,16,30,.92);backdrop-filter:blur(8px);padding:14px;overflow:auto;z-index:6}.dh-player .drawer-head{color:#fff;font-weight:800;font-size:12px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:10px}.dh-player .drawer button{color:#fff;background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.18)}.dh-player .drawer button .t{color:#cbd5e5}.dh-player .drawer button.now{background:rgba(247,148,30,.22);border-color:var(--accent)}.dh-player .wm{position:absolute;left:6%;top:12%;z-index:5;color:rgba(255,255,255,.22);font:700 14px system-ui;letter-spacing:.04em;pointer-events:none;text-shadow:0 0 2px rgba(0,0,0,.4);animation:wm 40s linear infinite}@keyframes wm{0%{left:6%;top:12%}25%{left:60%;top:30%}50%{left:20%;top:62%}75%{left:64%;top:70%}to{left:6%;top:12%}}.dh-player .astext{margin-top:10px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius)}.dh-player .astext summary{cursor:pointer;padding:12px 16px;font-weight:800;list-style:none}.dh-player .astext summary::-webkit-details-marker{display:none}.dh-player .astext summary:before{content:"\25B8  ";color:var(--accent-text,#b45309)}.dh-player .astext[open] summary:before{content:"\25BE  "}.dh-player .astext-body{padding:0 16px 14px;color:var(--muted);max-height:280px;overflow:auto}.dh-player .astext-body p{margin:0 0 8px}@media (max-width:1100px){.dh-player .watch.with-rail{display:block}.dh-player .rail{display:none}.dh-player .chip-row{display:flex}}@media (prefers-reduced-motion:reduce){.dh-player .wm{animation:none}}.dh-player{background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;min-height:100vh}.dh-player a{color:inherit}.dh-player .regionpill{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:999px;padding:7px 12px;font-weight:700;font-size:14px;background:var(--panel)}.dh-player .regionpill:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--ok)}.dh-player 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