.l5acad{--page:#050608;--bg0:#08090C;--bg1:#0F1117;--bg2:#171A22;--line:#2A2E3A;--line2:#1E2230;--text:#E4E2DF;--text2:#9B9A97;--muted:#7A7976;--hi:#F4F2EE;--lo:#86857F;--card:#0E0F13;--card2:#15161B;--gold:#D4A039;--gold2:#E4B049;--display:Sora,system-ui,sans-serif;--ui:"DM Sans",system-ui,-apple-system,sans-serif;--gut:max(22px, calc((100vw - 1260px)/2) )}.l5acad{background:var(--page);color:var(--text);font:17px/1.55 var(--ui);-webkit-font-smoothing:antialiased;overflow-x:clip;padding-bottom:clamp(40px,6vw,80px)}.l5acad *{box-sizing:border-box}.l5acad [hidden]{display:none!important}.l5acad a{color:var(--gold);text-decoration:none}.l5acad button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;text-align:inherit}.l5acad h1,.l5acad h2,.l5acad h3,.l5acad p,.l5acad ul,.l5acad ol{margin:0}.l5acad ul,.l5acad ol{padding:0;list-style:none}.l5acad :focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:6px}.l5acad .eyebrow{font:600 clamp(19px,1.75vw,24px)/1.2 var(--display);color:var(--gold);letter-spacing:-.005em;margin-bottom:10px}.l5acad .head{font:700 clamp(38px,5.2vw,72px)/1.04 var(--display);letter-spacing:-.04em;color:var(--hi)}.l5acad .intro{font:500 clamp(19px,1.62vw,23px)/1.42 var(--ui);color:var(--lo);max-width:820px;margin-top:22px;letter-spacing:-.005em}.l5acad .intro b{color:var(--hi);font-weight:600}.l5acad .l5pill{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:999px;background:var(--gold);color:#16110a;font:600 17px var(--ui);white-space:nowrap}.l5acad .l5pill:hover{background:var(--gold2)}.l5acad .hero{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:clamp(24px,4vw,64px);align-items:center;padding:clamp(28px,4vw,56px) var(--gut) 0;min-height:min(calc(100svh - 52px),760px)}.l5acad .hero h1{font:800 clamp(46px,6.3vw,92px)/1 var(--display);letter-spacing:-.045em;color:var(--hi)}.l5acad .hero .mark{font:800 clamp(15px,1.3vw,18px) var(--display);letter-spacing:.2em;color:var(--hi);margin-bottom:22px}.l5acad .hero .mark .five{color:var(--gold);font-size:.66em;position:relative;top:-.5em;margin-left:1px}.l5acad .hero .mark .w{color:var(--gold);letter-spacing:.14em;margin-left:.5em}.l5acad .hero .intro{max-width:30em}.l5acad .ask{margin-top:34px}.l5acad .ask p{font:600 15px var(--ui);color:var(--text);margin-bottom:12px}.l5acad .ways{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;max-width:560px}.l5acad .way{display:block;padding:14px 18px;border-radius:14px;background:var(--card2);box-shadow:inset 0 0 0 1px var(--line);transition:box-shadow .15s,background .15s}.l5acad .way b{display:block;font:600 16px/1.25 var(--ui);color:var(--hi)}.l5acad .way span{display:block;font-size:13.5px;color:var(--lo);margin-top:2px}.l5acad .way:hover{background:var(--bg2);box-shadow:inset 0 0 0 1.5px var(--gold)}.l5acad .mary{position:relative;align-self:end;display:flex;flex-direction:column;align-items:center;min-width:0}.l5acad .mary img{display:block;width:100%;max-width:520px;height:auto;max-height:calc(100svh - 190px);object-fit:contain;object-position:bottom;-webkit-mask-image:radial-gradient(51% 51% at 50% 48%,#000 66%,transparent 100%);mask-image:radial-gradient(51% 51% at 50% 48%,#000 66%,transparent 100%)}.l5acad .say{position:relative;margin-top:-34px;max-width:440px;text-align:center;font:500 clamp(17px,1.5vw,20px)/1.4 var(--ui);color:var(--text);padding-bottom:30px;min-height:4.2em}.l5acad .say i{font-style:normal;opacity:0;animation:l5acad-word .3s ease forwards}@keyframes l5acad-word{to{opacity:1}}@media(prefers-reduced-motion:reduce){.l5acad .say i{opacity:1;animation:none}}@media(max-width:900px){.l5acad .hero{grid-template-columns:1fr;min-height:0;gap:6px}.l5acad .mary{order:-1}.l5acad .mary img{max-width:300px;max-height:none}.l5acad .say{margin-top:-26px;min-height:0;padding-bottom:14px;font-size:16px}.l5acad .ways{grid-template-columns:1fr}}.l5acad .path{position:sticky;top:52px;z-index:50;background:#050608e6;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-top:1px solid var(--line2);border-bottom:1px solid var(--line2);margin-top:clamp(28px,4vw,56px)}.l5acad .path-in{position:relative;display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;padding:0 var(--gut)}.l5acad .path-in::-webkit-scrollbar{display:none}.l5acad .path a{flex:none;padding:13px 12px 12px;font:500 14px var(--ui);color:var(--lo);white-space:nowrap}.l5acad .path a:hover,.l5acad .path a.on{color:var(--hi)}.l5acad .path a small{font:400 12px var(--ui);color:var(--muted);margin-left:5px}.l5acad .po{position:relative;display:block;width:100%;aspect-ratio:16/9;border-radius:14px;overflow:hidden;background:var(--bg1);box-shadow:inset 0 0 0 1px var(--line2)}.l5acad .po>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:top left}.l5acad .po:after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 55%,#050608b8);pointer-events:none}.l5acad .po .fa{position:absolute;right:3.5%;bottom:6%;width:17%;aspect-ratio:264/284;border-radius:10px;overflow:hidden;box-shadow:0 0 0 1px #ffffff24,0 8px 24px #00000080;z-index:2}.l5acad .po .fa img{width:100%;height:100%;object-fit:cover;display:block}.l5acad .po .len{position:absolute;left:3.5%;bottom:6%;z-index:2;font:500 13px var(--ui);color:var(--hi);background:#050608b8;padding:2px 8px;border-radius:6px;font-variant-numeric:tabular-nums}.l5acad .po .play{position:absolute;left:50%;top:50%;width:68px;height:68px;margin:-34px 0 0 -34px;border-radius:50%;background:#05060899;box-shadow:inset 0 0 0 1.5px #f4f2eebf;z-index:2;display:grid;place-items:center;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);transition:background .15s}.l5acad .po .play svg{width:24px;height:24px;fill:var(--hi);margin-left:3px}.l5acad .po:not(.big) .fa{display:none}.l5acad a:hover>.po .play,.l5acad button:hover>.po .play{background:var(--gold)}.l5acad a:hover>.po .play svg,.l5acad button:hover>.po .play svg{fill:#16110a}.l5acad .chap{padding:clamp(72px,9vw,130px) 0 0}.l5acad .chap-h{padding:0 var(--gut)}.l5acad .rail{display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;padding:32px var(--gut) 6px;scroll-padding-left:var(--gut)}.l5acad .rail::-webkit-scrollbar{display:none}.l5acad .card{flex:0 0 clamp(280px,29vw,392px);scroll-snap-align:start;display:block;color:inherit}.l5acad .card h3{font:600 18.5px/1.25 var(--ui);color:var(--hi);margin-top:14px}.l5acad .card p{font-size:15.5px;line-height:1.42;color:var(--lo);margin-top:5px}.l5acad .card:hover h3{color:var(--gold2)}.l5acad .rail-nav{display:flex;gap:8px;justify-content:flex-end;padding:8px var(--gut) 0}.l5acad .rail-nav button{width:36px;height:36px;border-radius:50%;background:var(--card2);box-shadow:inset 0 0 0 1px var(--line);display:grid;place-items:center;color:var(--hi)}.l5acad .rail-nav button:hover{box-shadow:inset 0 0 0 1px var(--gold)}.l5acad .rail-nav svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.l5acad .qa{padding:clamp(72px,9vw,130px) var(--gut) 0;display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.5fr);gap:32px}.l5acad .qa .head{font-size:clamp(34px,4vw,56px)}.l5acad details.q{border-top:1px solid var(--line2);padding:16px 0}.l5acad details.q:last-child{border-bottom:1px solid var(--line2)}.l5acad details.q summary{cursor:pointer;font:600 18px/1.3 var(--ui);color:var(--hi);list-style:none;display:flex;justify-content:space-between;gap:16px}.l5acad details.q summary::-webkit-details-marker{display:none}.l5acad details.q summary:after{content:"+";color:var(--gold);font-weight:400}.l5acad details.q[open] summary:after{content:"−"}.l5acad details.q p{color:var(--lo);margin-top:8px;max-width:60ch;font-size:16px}@media(max-width:900px){.l5acad .qa{grid-template-columns:1fr}}.l5acad .try{text-align:center;padding:clamp(80px,10vw,140px) var(--gut) 0}.l5acad .try .intro{margin-left:auto;margin-right:auto;max-width:640px}.l5acad .try .l5pill{margin-top:28px}.l5acad .topic{padding:clamp(20px,2.4vw,32px) var(--gut) 0;max-width:1304px;margin:0 auto}.l5acad .crumb{font-size:14px;color:var(--lo)}.l5acad .crumb a{color:var(--lo)}.l5acad .crumb a:hover{color:var(--hi)}.l5acad .crumb span{margin:0 7px;color:var(--muted)}.l5acad .t-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:clamp(24px,3.4vw,48px);align-items:start;margin-top:14px}.l5acad .player{position:relative;width:100%;display:block;cursor:pointer;border-radius:16px;aspect-ratio:16/9}.l5acad .player .po{border-radius:16px;height:100%}.l5acad .player .po .play{width:88px;height:88px;margin:-44px 0 0 -44px}.l5acad .player .po .play svg{width:30px;height:30px}.l5acad .player-frame{display:block;width:100%;aspect-ratio:16/9;border:0;border-radius:16px;background:#000}.l5acad .t-title{font:700 clamp(32px,3.6vw,50px)/1.08 var(--display);letter-spacing:-.03em;color:var(--hi);margin-top:24px}.l5acad .t-out{font:500 clamp(18px,1.5vw,21px)/1.4 var(--ui);color:var(--lo);margin-top:10px;max-width:40em}.l5acad .t-meta{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:14px;color:var(--lo);margin-top:14px}.l5acad .t-meta a{color:var(--lo);text-decoration:underline;text-underline-offset:3px}.l5acad .t-meta a:hover{color:var(--hi)}.l5acad .t-sec{margin-top:40px;max-width:44em}.l5acad .t-sec h2{font:600 22px/1.2 var(--display);letter-spacing:-.015em;color:var(--hi);margin-bottom:12px}.l5acad .t-sec p{color:var(--text);line-height:1.6}.l5acad .t-sec p+p{margin-top:12px}.l5acad .marks li{border-top:1px solid var(--line2)}.l5acad .marks li:last-child{border-bottom:1px solid var(--line2)}.l5acad .marks button{display:grid;grid-template-columns:54px 1fr;gap:10px;align-items:baseline;width:100%;padding:11px 0;color:var(--text)}.l5acad .marks button:hover{color:var(--hi)}.l5acad .marks time{color:var(--gold);font-variant-numeric:tabular-nums;font-size:15px}.l5acad .fold summary{cursor:pointer;font:600 22px/1.2 var(--display);letter-spacing:-.015em;color:var(--hi)}.l5acad .fold p{margin-top:12px;color:var(--text2)}.l5acad .side{position:sticky;top:72px;display:grid;gap:30px}.l5acad .side h2{font:600 17px var(--ui);color:var(--hi);margin-bottom:10px}.l5acad .nexts a{display:grid;grid-template-columns:128px 1fr;gap:12px;align-items:center;color:inherit;padding:7px 0}.l5acad .nexts a .po{border-radius:8px}.l5acad .nexts .po .play{display:none}.l5acad .nexts .po .len{font-size:11px;padding:0 5px;left:5%}.l5acad .nexts b{font:600 15px/1.28 var(--ui);color:var(--hi);display:block}.l5acad .nexts a:hover b{color:var(--gold2)}.l5acad .nexts a.here b{color:var(--gold)}.l5acad .nexts small{color:var(--lo);font-size:13px}.l5acad .side .channel{font-size:15px;color:var(--lo);line-height:1.5}.l5acad .pn{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:48px;max-width:44em}.l5acad .pn a{padding:14px 16px;border-radius:12px;background:var(--card);box-shadow:inset 0 0 0 1px var(--line2);color:inherit}.l5acad .pn a:hover{box-shadow:inset 0 0 0 1px var(--gold)}.l5acad .pn small{display:block;color:var(--lo);font-size:13px}.l5acad .pn b{display:block;font:600 16px/1.25 var(--ui);color:var(--hi);margin-top:2px}.l5acad .pn a.r{text-align:right;grid-column:2}@media(max-width:1000px){.l5acad .t-grid{grid-template-columns:1fr}.l5acad .side{position:static}}