:root{--rail-width:168px;--header-height:72px;--ink:#e6e8ed;--muted:#a1a6b0;--cyan:#35c9f2;--line:#2d3036;--dark:#141518;--surface:#202227;--feed-gap:18px;color-scheme:dark}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--header-height)}
body{margin:0;min-width:280px;background:var(--dark);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
button,input{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
button{cursor:pointer;border:0}
a{color:inherit;text-decoration:none}
button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--cyan);outline-offset:4px}
[hidden]{display:none!important}

.topbar{position:sticky;top:0;height:var(--header-height);z-index:30;background:rgba(20,21,24,.97);color:#fff;backdrop-filter:blur(18px)}
.nav-shell{position:relative;width:100%;height:100%;padding:0 30px;display:flex;align-items:center;justify-content:space-between}
.brand{display:inline-flex;align-items:center;gap:9px;font-size:24px;font-weight:850;letter-spacing:-1px}
.brand-mark{width:31px;height:31px;display:grid;place-items:center;border-radius:10px;background:var(--cyan);transform:rotate(-5deg)}
.brand-mark:before{content:"";border-top:7px solid transparent;border-bottom:7px solid transparent;border-left:11px solid #fff;margin-left:3px}
.brand small{display:none}
.search{position:absolute;left:50%;transform:translateX(-50%);width:clamp(260px,34vw,480px);margin:0}
.search-box{height:40px;width:100%;display:flex;align-items:center;gap:12px;padding:0 7px 0 18px;border:1px solid #46484d;border-radius:22px;background:#2d2f34;transition:background .2s,border-color .2s}
.search-box:focus-within{background:#373a40;border-color:#8d929b}
.search-box input{width:100%;min-width:0;color:#fff;background:none;border:0;outline:0;font-size:13px}
.search-box input::placeholder{color:#a3a6ae}
.search-btn{width:30px;height:30px;flex:none;display:grid;place-items:center;background:none;color:#d6d8df}
.search-icon{width:14px;height:14px;position:relative;border:2px solid currentColor;border-radius:50%}
.search-icon:after{content:"";position:absolute;right:-5px;bottom:-3px;width:6px;height:2px;border-radius:2px;background:currentColor;transform:rotate(45deg)}
.nav-actions{display:flex;align-items:center;gap:18px}
.upload-btn{height:34px;display:flex;align-items:center;gap:5px;padding:0 15px;border-radius:7px;background:var(--cyan);color:#09242e;font-size:13px}
.upload-btn span{font-size:20px}
.avatar{width:34px;height:34px;border-radius:50%;background:#ffb59e;color:#652f35;font-weight:700}
.nav-caption{font-size:12px;color:#aeb0b7}

.page{margin-left:var(--rail-width);min-width:0}
.side-nav{position:fixed;z-index:25;left:0;top:var(--header-height);bottom:0;width:var(--rail-width);padding:3px 16px 24px;background:var(--dark);color:#8e9198;overflow-y:auto;scrollbar-width:thin;scrollbar-color:#34363c transparent}
.side-nav nav{display:flex;flex-direction:column;gap:5px}
.side-link{min-height:43px;display:flex;align-items:center;gap:14px;padding:0 16px;border-radius:8px;font-size:15px;white-space:nowrap;transition:color .2s,background .2s}
.side-link svg{width:19px;height:19px;flex:none;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round}
.side-link:hover{background:#22252a;color:#fff}
.side-link.active{background:#262e34;color:#55d5f5;font-weight:650}
.side-divider{height:1px;margin:10px 14px;background:#292b30}
.side-caption{font-size:10px;letter-spacing:2px;color:#575d67;padding:22px 16px 0}

.hero{position:relative;height:554px;isolation:isolate;overflow:hidden;padding:44px 32px 0;color:#fff;background:var(--dark)}
.hero-backdrop{position:absolute;z-index:-2;inset:0 0 90px;background-color:#202b35;background-size:cover;background-position:center 35%;transition:background .3s ease}
.hero:after{content:"";position:absolute;z-index:-1;inset:0;background:linear-gradient(0deg,#141518 0%,rgba(20,21,24,.92) 14%,transparent 49%),linear-gradient(90deg,#141518 0%,rgba(20,21,24,.92) 16%,rgba(20,21,24,.5) 44%,rgba(20,21,24,.02) 80%);pointer-events:none}
.hero-copy{max-width:530px;position:relative}
.eyebrow{color:#c8d7dc;display:flex;gap:10px;align-items:center;font-size:12px;letter-spacing:2px;margin-bottom:16px}
.eyebrow:before{content:"";height:6px;width:6px;border-radius:50%;background:var(--cyan)}
.hero h1{margin:0;font-size:clamp(34px,3.8vw,58px);font-weight:800;line-height:1.18;letter-spacing:-1.8px;text-shadow:0 2px 24px #14151866}
.hero-tags{display:flex;gap:7px;margin-top:18px;font-size:11px;color:#ccd5dd}
.hero-tags span{padding:4px 7px;background:#ffffff13;border-radius:3px}
.hero-tags span:first-child{color:#77dffa;background:#35c9f21c}
.hero p{max-width:425px;margin:13px 0 20px;font-size:13px;line-height:1.8;color:#b8bec8;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}
.hero-bottom{display:flex;align-items:center;gap:17px}
.primary-btn{height:40px;display:inline-flex;align-items:center;gap:9px;padding:0 20px;border-radius:6px;color:#10212b;background:var(--cyan);font-size:13px;font-weight:700}
.primary-btn:hover{background:#79e2fc}
.play-triangle{width:0;height:0;border-top:5px solid transparent;border-bottom:5px solid transparent;border-left:8px solid currentColor}
.hero-note{font-size:11px;color:#9198a2}
.hero-controls{position:absolute;right:34px;top:282px;display:flex;gap:8px}
.hero-arrow,.feed-arrow{width:32px;height:32px;display:grid;place-items:center;background:#ffffff1c;color:white;border-radius:50%;font-size:18px}
.hero-arrow:hover,.feed-arrow:hover{background:#ffffff38}
.hero-posters{position:absolute;left:32px;right:32px;bottom:24px;display:flex;gap:12px;overflow-x:auto;scrollbar-width:none;padding:4px 0}
.hero-posters::-webkit-scrollbar{display:none}
.hero-poster{position:relative;flex:0 0 clamp(112px,calc((100% - 84px)/8),155px);height:166px;padding:0;overflow:hidden;border:2px solid transparent;border-radius:7px;color:#fff;text-align:left;background:#26344b;transition:border .2s,transform .2s}
.hero-poster:first-child{margin-left:auto}
.hero-poster:hover{transform:translateY(-3px)}
.hero-poster.active{border-color:#64daf9}
.poster-art{position:absolute;inset:0;overflow:hidden;background-size:cover;background-position:center}
.poster-art>img{width:100%;height:100%;object-fit:cover;object-position:center top}
.hero-backdrop.art-tv{background-image:url('media/tv/home-hero-tv-55678.jpg')}
.hero-poster:after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 20%,#101623b8)}
.poster-badge{position:absolute;z-index:2;top:7px;left:7px;font-size:10px;font-weight:650;text-shadow:0 1px 6px #000}
.poster-name{position:absolute;z-index:2;left:9px;right:7px;bottom:12px;font-size:17px;font-weight:750;letter-spacing:-.5px}
.poster-name small{display:block;font-size:10px;font-weight:400;color:#d0d4df;margin-top:5px;letter-spacing:0}
.poster-word{position:absolute;left:10px;top:44px;font-size:30px;line-height:.95;font-weight:900;letter-spacing:-2px;opacity:.4;transform:rotate(-9deg)}

.art-ai{background-image:url('media/creator-ai-poster.jpg');background-size:cover;background-position:center}
.art-night{background:radial-gradient(circle at 76% 23%,#e5dbb8 0 9%,transparent 9.4%),linear-gradient(145deg,#1a234b,#5364a0 65%,#bd9faf)}
.art-night:before{content:"";position:absolute;inset:62% -10% -20%;background:#172238;transform:rotate(-12deg);border-radius:45% 45% 0 0;box-shadow:-36px -20px 0 #283b61}
.art-fight{background:radial-gradient(ellipse at 70% 40%,#ffca8677,transparent 55%),linear-gradient(125deg,#62203e,#d56666 55%,#eab785)}
.art-fight:before,.art-music:before{content:"";position:absolute;width:62%;height:65%;border:14px solid #ffffff22;border-radius:50%;right:-12%;top:17%;box-shadow:0 0 0 12px #ffffff12,0 0 0 26px #ffffff08}
.art-city{background:linear-gradient(140deg,#184f65,#5ea49f 64%,#ccdda3)}
.art-city:before{content:"";position:absolute;right:9%;bottom:17%;height:52%;width:22%;background:repeating-linear-gradient(0deg,transparent 0 10px,#ffffff33 10px 13px),#133e59;box-shadow:-35px 23px 0 #286079,28px 38px 0 #7ac4b0;transform:skewY(-9deg)}
.art-food{background:radial-gradient(circle at 70% 42%,#e4b756 0 12%,#677f49 13% 17%,#f9eaca 18% 27%,#eee0ba 28% 30%,transparent 31%),linear-gradient(130deg,#ac5537,#dfa666)}
.art-music{background:linear-gradient(130deg,#403967,#996daa 60%,#dda7b8)}
.art-travel{background:linear-gradient(163deg,#c5dee0 0 44%,#618977 45% 60%,#284d4a 61% 75%,#d8c8a2 76%)}
.art-game{background:linear-gradient(140deg,#141d43,#465da9 66%,#d87897)}
.art-game:before{content:"";position:absolute;right:10%;top:22%;height:60%;width:40%;border:2px solid #80dce3;transform:rotate(35deg);box-shadow:0 0 28px #38cef44d,inset 0 0 22px #38cef44d}
.art-room{background:linear-gradient(135deg,#dfcfc0,#a2b9a6)}
.art-room:before{content:"";position:absolute;right:12%;top:12%;width:37%;height:62%;border:7px solid #e7e3d7;background:linear-gradient(20deg,#406560,#a9c8c4);box-shadow:-45px 47px 0 -17px #997666}
.art-jazz{background:radial-gradient(circle at 72% 40%,#111d36 0 12%,#c39860 13% 15%,#172638 16% 28%,transparent 29%),linear-gradient(140deg,#3b3544,#b88664)}

.content-layout{padding:28px 32px 42px;background:var(--dark);scroll-margin-top:16px}
.section-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:21px}
.section-heading{display:flex;align-items:baseline;gap:12px}
.section-title{font-size:23px;letter-spacing:-.6px;margin:0}
.section-subtitle{color:var(--muted);font-size:12px;margin:0}
.feed-actions{display:flex;align-items:center;gap:14px}
.tabs{display:flex;gap:18px}
.tab{padding:7px 0;background:none;color:var(--muted);font-size:13px}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--cyan);font-weight:650}
.refresh-btn{display:flex;align-items:center;gap:6px;padding:6px 10px;background:var(--surface);border:1px solid var(--line);border-radius:6px;font-size:12px;color:#c8cdd6}
.refresh-btn:hover{background:#2b2e35;color:#fff}
.refresh-btn span{font-size:17px}
/* Desktop feed: a 2 × 2 carousel leaves three cards beside it and five below. */
.video-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:24px var(--feed-gap);align-items:start}
.video-card{min-width:0;cursor:pointer;border-radius:6px;outline-offset:4px}
.cover{position:relative;isolation:isolate;overflow:hidden;aspect-ratio:16/9;border-radius:6px;background-color:#25304b;transition:filter .2s}
.video-card:hover .cover{filter:brightness(1.07)}
.cover-illustration{position:absolute;inset:0;overflow:hidden}
.cover-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.cover-copy{position:absolute;z-index:1;left:13px;right:10px;bottom:34px;color:#fff;text-shadow:0 2px 10px #0003}
.cover-copy strong{display:block;font-size:clamp(19px,1.8vw,28px);font-weight:850;line-height:1;letter-spacing:-1px}
.cover-copy span{display:block;font-size:10px;margin-top:6px;opacity:.85}
.cover-stats{position:absolute;z-index:2;bottom:0;left:0;right:0;display:flex;align-items:center;gap:11px;padding:19px 9px 7px;background:linear-gradient(transparent,#0009);color:#fff;font-size:11px}
.cover-stats .duration{margin-left:auto}
.cover-play{position:absolute;right:12px;bottom:37px;z-index:2;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#1118;color:#fff;opacity:0;transition:opacity .2s}
.video-card:hover .cover-play,.video-card:focus-visible .cover-play{opacity:1}
.cover-play:before{content:"";margin-left:2px;border-top:5px solid transparent;border-bottom:5px solid transparent;border-left:8px solid #fff}
.cover-preview{position:absolute;inset:0;z-index:3;width:100%;height:100%;object-fit:contain;background:#111;opacity:0;pointer-events:none}
.preview-hint,.preview-status{position:absolute;z-index:4;left:8px;top:8px;padding:4px 7px;border-radius:4px;background:#111b;color:#fff;font-size:10px;line-height:16px;pointer-events:none}
.preview-hint{opacity:0;transition:opacity .15s}
@media(hover:hover){.cover:hover .preview-hint{opacity:1}}
.preview-progress{position:absolute;z-index:4;left:0;right:0;bottom:0;height:3px;background:#ffffff45;opacity:0;pointer-events:none}
.preview-progress span{display:block;width:100%;height:100%;background:var(--cyan);transform:scaleX(0);transform-origin:left}
.cover.preview-loading .preview-hint,.cover.preview-playing .preview-hint{opacity:0}
.video-card .cover.preview-playing{filter:none}
.cover.preview-playing .cover-preview,.cover.preview-playing .preview-progress{opacity:1}
.cover.preview-playing .cover-copy,.cover.preview-playing .cover-play,.cover.preview-playing .cover-stats{visibility:hidden}
.card-title{margin:9px 0 0;color:var(--ink);font-size:14px;font-weight:500;line-height:22px;min-height:44px;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}
.video-card:hover .card-title{color:var(--cyan)}
.card-meta{display:flex;align-items:center;gap:5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:5px;color:var(--muted);font-size:11px;line-height:18px}
.card-meta:before{content:"UP";font-size:8px;line-height:10px;border:1px solid #a4a8b0;border-radius:3px;padding:0 2px}
.card-meta span+span:before{content:"·";padding:0 5px 0 0}
.feed-carousel{position:relative;min-width:0;max-width:100%;grid-column:span 2;grid-row:span 2;align-self:stretch;min-height:280px;margin-bottom:67px;overflow:hidden;border-radius:7px;color:#fff;background:#182c34}
.feed-art{position:absolute;inset:0;background-size:cover;background-position:center;transition:background .25s}
.feed-carousel:after{position:absolute;inset:0;content:"";background:linear-gradient(transparent 25%,#10232988 62%,#152c35 86%);pointer-events:none}
.feed-feature-link{position:absolute;z-index:2;inset:0;padding:25px;display:flex;flex-direction:column;justify-content:center;align-items:flex-start}
.feature-word{margin-top:38px;font-size:clamp(32px,3.2vw,56px);font-weight:850;line-height:1.2;letter-spacing:-2px;text-shadow:0 2px 20px #12243655}
.feature-subtitle{margin-top:10px;font-size:12px;letter-spacing:4px;opacity:.8}
.feed-caption{position:absolute;z-index:3;left:18px;bottom:43px;right:95px;font-size:17px;line-height:1.4;font-weight:500;pointer-events:none}
.feed-controls{position:absolute;z-index:4;right:14px;bottom:40px;display:flex;gap:7px}
.feed-arrow{width:28px;height:28px;border-radius:6px;font-size:16px}
.feed-dots{position:absolute;z-index:4;left:18px;bottom:18px;display:flex;gap:7px;align-items:center}
.feed-dot{width:7px;height:7px;padding:0;border-radius:50%;background:#ffffff66}
.feed-dot.active{width:11px;height:11px;background:white}
.empty-state{grid-column:1/-1;padding:60px 20px;color:var(--muted);text-align:center;background:var(--surface);border-radius:8px}
.footer{display:flex;justify-content:space-between;gap:18px;padding:24px 32px 32px;border-top:1px solid var(--line);color:var(--muted);font-size:11px}
.toast{position:fixed;z-index:50;left:50%;bottom:28px;max-width:90vw;padding:12px 19px;border-radius:9px;color:white;background:#252d3e;box-shadow:0 8px 30px #0002;font-size:13px;opacity:0;pointer-events:none;transform:translate(-50%,10px);transition:.2s}
.toast.show{opacity:1;transform:translate(-50%,0)}

@media(min-width:901px){
.feed-feature-link{padding:40px 25px 110px}
.feature-word{margin-top:0}
}

@media(min-width:1440px){
.hero{height:584px;padding-top:54px}
.hero-posters{bottom:28px}
.hero-poster{height:176px}
.hero-controls{top:314px}
}

@media(min-width:1900px){
.hero{height:640px}
.hero-poster{height:190px}
.hero-controls{top:350px}
.hero-backdrop{background-position:center 38%}
}

@media(max-width:1100px){:root{--rail-width:136px;--feed-gap:14px}
.nav-shell{padding:0 22px}
.side-nav{padding-inline:9px}
.side-link{padding-inline:12px;gap:11px;font-size:14px}
.hero{padding-left:26px}
.hero-posters{left:26px;right:26px}
.content-layout{padding-inline:26px}
.section-subtitle,.nav-caption{display:none}
.hero h1{font-size:42px}
.video-grid{gap:22px var(--feed-gap)}
.card-title{font-size:13px}
.feed-caption{font-size:15px}
.cover-stats{gap:6px;font-size:10px}
.card-meta{font-size:10px}
}

@media(max-width:900px){:root{--rail-width:92px}
.side-link{justify-content:center;flex-direction:column;gap:5px;padding:8px 3px;font-size:11px}
.side-nav{padding-inline:12px}
.side-caption,.side-divider{display:none}
.hero{height:548px;padding-top:35px}
.hero-copy{max-width:420px}
.hero p{max-width:340px}
.hero-controls{top:280px}
.video-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.feed-carousel{grid-column:1/-1;grid-row:auto;aspect-ratio:2.1;margin-bottom:0;min-height:260px}
.feed-art{background-position:center 40%}
.feature-word{font-size:45px}
.feed-caption{font-size:17px}
.section-head{gap:12px}
.tabs{gap:12px}
.feed-actions{gap:10px}
.refresh-btn{font-size:0;gap:0;padding:5px 9px}
.refresh-btn span{font-size:17px}
.nav-actions{gap:10px}
.upload-btn{padding:0 10px}
.brand{font-size:21px;gap:7px}
}

@media(max-width:640px){:root{--header-height:110px;--rail-width:0px;--feed-gap:12px}
html{scroll-padding-top:158px}
.topbar{height:110px}
.nav-shell{align-items:flex-start;padding:13px 16px}
.brand-mark{height:28px;width:28px;border-radius:8px}
.brand{height:30px;font-size:22px}
.nav-actions{height:30px;gap:12px}
.avatar{height:30px;width:30px}
.upload-btn{height:30px;font-size:12px}
.search{top:61px;width:calc(100% - 32px);max-width:none}
.search-box{height:35px}
.search-box input{font-size:12px}
.side-nav{position:sticky;top:110px;bottom:auto;width:100%;height:48px;padding:0 12px;overflow-x:auto;overflow-y:hidden;scrollbar-width:none;background:#1c1e22}
.side-nav nav{height:48px;flex-direction:row;gap:3px;width:max-content}
.side-link{min-height:36px;align-self:center;flex-direction:row;font-size:13px;padding:0 12px}
.side-link svg,.side-divider,.side-caption{display:none}
.hero{height:506px;padding:29px 20px 0}
.hero h1{font-size:35px}
.hero-copy{max-width:90%}
.hero p{font-size:12px;max-width:300px}
.hero-backdrop{background-position:63% center;bottom:80px}
.hero:after{background:linear-gradient(0deg,#141518 5%,transparent 80%),linear-gradient(90deg,#141518f2,#14151833)}
.eyebrow{font-size:10px;letter-spacing:1px;margin-bottom:12px}
.hero-tags{margin-top:13px;font-size:10px}
.hero p{margin:10px 0 15px}
.hero-note{font-size:10px}
.primary-btn{height:36px;padding:0 15px;font-size:12px}
.hero-controls{top:274px;right:20px}
.hero-posters{left:20px;right:20px;bottom:21px;gap:9px}
.hero-poster{flex-basis:101px;height:146px}
.poster-name{font-size:16px}
.content-layout{padding:23px 16px 30px;scroll-margin-top:12px}
.section-head{flex-wrap:wrap;margin-bottom:16px;gap:9px}
.section-title{font-size:21px}
.feed-actions{width:100%;justify-content:space-between}
.tabs{gap:23px}
.tab{font-size:12px}
.refresh-btn{font-size:11px;gap:4px;padding:4px 8px}
.refresh-btn span{font-size:15px}
.video-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 12px}
.feed-carousel{aspect-ratio:1.5;min-height:230px}
.feed-feature-link{padding:50px 18px 80px;justify-content:flex-start}
.feature-word{font-size:clamp(26px,8.2vw,34px);margin-top:0}
.feature-subtitle{display:none}
.feed-caption{font-size:14px;bottom:39px}
.feed-controls{bottom:37px}
.cover-copy{left:10px;bottom:27px}
.cover-copy strong{font-size:19px}
.cover-copy span{font-size:9px;margin-top:4px}
.card-title{font-size:13px;line-height:20px;min-height:40px;margin-top:7px}
.card-meta{font-size:10px;margin-top:4px}
.cover-stats{font-size:9px;gap:6px;padding:15px 7px 6px}
.cover-stats .comments{display:none}
.footer{padding:20px 16px;flex-direction:column;gap:7px}
}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
*,*:before,*:after{transition:none!important;animation:none!important}
}