html,body{width:100%;height:100%}input::-ms-clear,input::-ms-reveal{display:none}*,*:before,*:after{box-sizing:border-box}html{font-family:sans-serif;line-height:1.15;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;-ms-overflow-style:scrollbar;-webkit-tap-highlight-color:rgba(0,0,0,0)}@-ms-viewport{width:device-width}body{margin:0}[tabindex="-1"]:focus{outline:none}hr{box-sizing:content-box;height:0;overflow:visible}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:.5em;font-weight:500}p{margin-top:0;margin-bottom:1em}abbr[title],abbr[data-original-title]{-webkit-text-decoration:underline dotted;text-decoration:underline;text-decoration:underline dotted;border-bottom:0;cursor:help}address{margin-bottom:1em;font-style:normal;line-height:inherit}input[type=text],input[type=password],input[type=number],textarea{-webkit-appearance:none}ol,ul,dl{margin-top:0;margin-bottom:1em}ol ol,ul ul,ol ul,ul ol{margin-bottom:0}dt{font-weight:500}dd{margin-bottom:.5em;margin-left:0}blockquote{margin:0 0 1em}dfn{font-style:italic}b,strong{font-weight:bolder}small{font-size:80%}sub,sup{position:relative;font-size:75%;line-height:0;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}pre,code,kbd,samp{font-size:1em;font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,Courier,monospace}pre{margin-top:0;margin-bottom:1em;overflow:auto}figure{margin:0 0 1em}img{vertical-align:middle;border-style:none}a,area,button,[role=button],input:not([type=range]),label,select,summary,textarea{touch-action:manipulation}table{border-collapse:collapse}caption{padding-top:.75em;padding-bottom:.3em;text-align:left;caption-side:bottom}input,button,select,optgroup,textarea{margin:0;color:inherit;font-size:inherit;font-family:inherit;line-height:inherit}button,input{overflow:visible}button,select{text-transform:none}button,html [type=button],[type=reset],[type=submit]{-webkit-appearance:button}button::-moz-focus-inner,[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner{padding:0;border-style:none}input[type=radio],input[type=checkbox]{box-sizing:border-box;padding:0}input[type=date],input[type=time],input[type=datetime-local],input[type=month]{-webkit-appearance:listbox}textarea{overflow:auto;resize:vertical}fieldset{min-width:0;margin:0;padding:0;border:0}legend{display:block;width:100%;max-width:100%;margin-bottom:.5em;padding:0;color:inherit;font-size:1.5em;line-height:inherit;white-space:normal}progress{vertical-align:baseline}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{outline-offset:-2px;-webkit-appearance:none}[type=search]::-webkit-search-cancel-button,[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{font:inherit;-webkit-appearance:button}output{display:inline-block}summary{display:list-item}template{display:none}[hidden]{display:none!important}mark{padding:.2em;background-color:#feffe6}:root{--bili:#cf1322;--text:#18191c;--sub:#9499a0;--line:#e3e5e7;--bg:#f1f2f3;--blue:#1677ff}*{box-sizing:border-box;margin:0;padding:0;font-family:PingFang SC,Microsoft YaHei,sans-serif}body{background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.bili-academy .top{position:fixed;top:0;left:0;right:0;height:56px;background:linear-gradient(180deg,#00000052,#0000001a 55%,#0000);display:flex;align-items:center;padding:0 24px;z-index:50}.bili-academy .logo{color:#fff;font-size:20px;font-weight:700;cursor:pointer;display:flex;align-items:center;gap:8px;text-shadow:0 1px 4px rgba(0,0,0,.7)}.bili-academy .logo img{width:28px;height:28px;display:block}.bili-academy .top.scrolled{background:#fff;box-shadow:0 1px 3px #0000000f}.bili-academy .top.scrolled .logo,.bili-academy .top.scrolled .menu a,.bili-academy .top.scrolled .top-right .tr-link{color:#18191c;text-shadow:none}.bili-academy .top.scrolled .top-right .tr-link:hover,.bili-academy .top.scrolled .menu a:hover{opacity:.7}.bili-academy .top.scrolled .nav-search input{background:#f1f2f3}.bili-academy .top.scrolled .nav-search button svg{stroke:#18191c}.bili-academy .menu{display:flex;gap:28px;margin-left:32px}.bili-academy .menu a{font-size:14px;color:#fff;transition:opacity .2s;text-shadow:0 1px 6px rgba(0,0,0,.75)}.bili-academy .menu a:hover{color:#fff;opacity:.85}.bili-academy .menu a.cur{color:#fff;font-weight:600}.bili-academy .top-right{margin-left:auto;display:flex;align-items:center;gap:18px}.bili-academy .top-right .tr-link{font-size:13px;color:#fff;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:2px;transition:opacity .2s;text-shadow:0 1px 6px rgba(0,0,0,.75)}.bili-academy .top-right .tr-link:hover{color:#fff;opacity:.85}.bili-academy .top-right .tr-link .tr-icon{font-size:18px}.bili-academy .login-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,#cf1322,#ff7875);cursor:pointer;display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;text-shadow:none}.bili-academy .nav-search{flex:1;max-width:400px;margin:0 auto;display:flex;align-items:center;position:relative}.bili-academy .nav-search input{flex:1;height:36px;border:none;border-radius:18px;padding:0 38px 0 16px;font-size:13px;outline:none;background:#f1f2f3;color:#18191c}.bili-academy .nav-search input::placeholder{color:#9499a0}.bili-academy .nav-search input:focus{background:#fff;box-shadow:inset 0 0 0 1px var(--bili)}.bili-academy .nav-search button{position:absolute;right:2px;top:50%;transform:translateY(-50%);width:32px;height:32px;background:transparent;border:none;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0}.bili-academy .nav-search button svg{width:16px;height:16px;stroke:#18191c;display:block}.bili-academy .wrap{background:#fff;padding:10px 24px 60px 92px}.bili-academy .wrap.wrap-home{max-width:1920px;margin:0 auto}.bili-academy .wrap.ov-top{padding:56px 92px 60px}.bili-academy .wrap.ov-top .row{max-width:1440px;margin:0 auto}.bili-academy .top-banner{aspect-ratio:9.6 / 1;border-radius:0;margin-bottom:0;background:#b8d8c0 url(/portal/covers/beijing.png) center / 100% auto no-repeat;position:relative;overflow:hidden}.bili-academy .top-banner:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#0f371e73,#0f371e1f 35%,#0f371e00 65%,#0000);pointer-events:none}.bili-academy .top-banner:after{content:"";position:absolute;right:-100px;top:40%;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,#ffffff1a,#fff0 70%);transform:translateY(-50%);pointer-events:none}.bili-academy .banner-content{position:relative;z-index:2;max-width:none;margin:0 auto;padding:64px 24px 18px 92px;color:#fff}.bili-academy .banner-content h2{font-size:28px;font-weight:700;margin-bottom:6px;letter-spacing:1px;text-shadow:0 2px 10px rgba(0,0,0,.4)}.bili-academy .banner-content p{font-size:14px;opacity:.95;letter-spacing:.5px;text-shadow:0 1px 6px rgba(0,0,0,.5)}.bili-academy .fs-row{display:grid;grid-template-columns:repeat(5,minmax(0,1fr)) 56px;gap:16px 12px;margin-bottom:32px}.bili-academy .fs-row.is-empty{margin-bottom:6px}.bili-academy .fs-left{grid-column:1 / span 2;grid-row:1 / span 2;position:relative;border-radius:12px;overflow:hidden}.bili-academy .fs-banner{display:flex;transition:transform .5s ease;height:100%}.bili-academy .fs-slide{min-width:100%;height:100%;position:relative;cursor:pointer}.bili-academy .fs-slide img{width:100%;height:100%;object-fit:cover}.bili-academy .fs-slide .fs-info{position:absolute;bottom:0;left:0;right:0;padding:80px 24px 20px;background:linear-gradient(transparent,#000000bf);color:#fff}.bili-academy .fs-slide .fs-info h3{font-size:20px;font-weight:600}.bili-academy .fs-slide .fs-info p{font-size:13px;margin-top:6px;opacity:.85}.bili-academy .fs-dots{position:absolute;bottom:12px;right:20px;display:flex;gap:6px;z-index:5}.bili-academy .fs-dots span{width:6px;height:6px;border-radius:50%;background:#ffffff80;cursor:pointer;transition:all .3s}.bili-academy .fs-dots span.cur{background:#fff;width:18px;border-radius:3px}.bili-academy .fs-arrow{position:absolute;top:50%;transform:translateY(-50%);width:36px;height:36px;border-radius:50%;background:#0006;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;transition:opacity .3s;font-size:16px;z-index:5}.bili-academy .fs-left:hover .fs-arrow{opacity:1}.bili-academy .fs-arrow.prev{left:10px}.bili-academy .fs-arrow.next{right:10px}.bili-academy .fs-right-wrap,.bili-academy .fs-right{display:contents}.bili-academy .fs-mini{border-radius:6px;overflow:hidden;cursor:pointer;position:relative;background:transparent;transition:opacity .15s;animation:miniIn .45s cubic-bezier(.22,1,.36,1)}.bili-academy .fs-mini:hover{opacity:.88}@keyframes miniIn{0%{opacity:0;transform:translateY(16px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}.bili-academy .fs-mini .vc-cover{border-radius:6px}.bili-academy .fs-mini .vc-body{padding:4px 2px 0}.bili-academy .fs-mini .vc-title{font-size:12px;line-height:1.4;max-height:34px;-webkit-line-clamp:2}.bili-academy .fs-mini .vc-up-row{font-size:11px;margin-top:6px;flex-wrap:wrap;row-gap:2px}.bili-academy .fs-refresh{position:relative;grid-column:6;grid-row:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;font-size:12px;color:#61666d;background:#fff;border:none;border-radius:8px;box-shadow:0 2px 10px #00000014;padding:14px 4px;cursor:pointer;transition:all .2s;width:40px;justify-self:center;align-self:start}@media (max-width: 1400px){.bili-academy .fs-row{grid-template-columns:repeat(4,minmax(0,1fr)) 48px}.bili-academy .fs-refresh{grid-column:5}.bili-academy .video-grid{grid-template-columns:repeat(4,1fr) 48px}}.bili-academy .fs-refresh:hover{color:var(--bili);box-shadow:0 4px 14px #0000001f}.bili-academy .fs-refresh .refresh-icon{font-size:18px;line-height:1}.bili-academy .fs-refresh .refresh-text{writing-mode:vertical-rl;letter-spacing:2px;white-space:nowrap}.bili-academy .fs-refresh.spinning .refresh-icon{animation:spin .7s linear infinite}.bili-academy .fs-refresh .refresh-empty-tip{position:absolute;left:50%;bottom:calc(100% + 6px);transform:translate(-50%);white-space:nowrap;font-size:12px;color:#fff;background:#384250eb;border-radius:6px;padding:6px 12px;z-index:60;box-shadow:0 2px 8px #00000029}.bili-academy .fs-refresh .refresh-empty-tip:before{content:"";position:absolute;left:50%;bottom:-5px;transform:translate(-50%);border:5px solid transparent;border-top-color:#384250e0}.bili-academy .tip-fade-enter-active,.bili-academy .tip-fade-leave-active{transition:opacity .25s,transform .25s}.bili-academy .tip-fade-enter-from,.bili-academy .tip-fade-leave-to{opacity:0;transform:translate(-50%) translateY(6px)}.bili-academy .channel-nav{display:flex;align-items:center;margin:0 0 16px;padding:12px 16px;background:#fff;border-radius:8px;border:1px solid var(--line)}.bili-academy .channel-nav .cn-tab{display:flex;flex-direction:column;background:#f6f7f8;border-radius:6px;overflow:hidden;margin-right:16px;min-width:50px}.bili-academy .channel-nav .cn-tab-item{font-size:12px;color:#61666d;cursor:pointer;padding:6px 12px;text-align:center;transition:all .2s}.bili-academy .channel-nav .cn-tab-item:hover{color:var(--bili)}.bili-academy .channel-nav .cn-tab-item.cur{color:#fff;background:var(--bili);font-weight:600}.bili-academy .channel-nav .cn-tab-item+.cn-tab-item{border-top:1px solid var(--line)}.bili-academy .channel-nav .cn-list{flex:1;display:flex;align-items:center;flex-wrap:wrap}.bili-academy .channel-nav .cn-item{font-size:13px;color:#18191c;cursor:pointer;padding:4px 0;margin-right:22px;position:relative;transition:color .2s;white-space:nowrap}.bili-academy .channel-nav .cn-item:hover{color:var(--bili)}.bili-academy .channel-nav .cn-item.cur{color:var(--bili);font-weight:600}.bili-academy .channel-nav .cn-item.cur:after{content:"";position:absolute;bottom:-2px;left:50%;transform:translate(-50%);width:16px;height:2px;border-radius:1px;background:var(--bili)}.bili-academy .channel-nav .cn-divider{width:1px;height:14px;background:var(--line);margin:0 10px}.bili-academy .channel-nav .cn-more{font-size:12px;color:var(--sub);cursor:pointer;padding:3px 10px;border:1px solid var(--line);border-radius:4px;transition:all .2s;white-space:nowrap}.bili-academy .channel-nav .cn-more:hover{color:var(--bili);border-color:var(--bili)}.bili-academy .video-grid{display:grid;grid-template-columns:repeat(5,1fr) 56px;gap:16px 12px;margin-bottom:32px}.bili-academy .video-card{background:transparent;border-radius:6px;overflow:hidden;cursor:pointer;transition:opacity .15s;grid-column-end:span 1}.bili-academy .video-card:nth-child(5n+1){grid-column-start:1}.bili-academy .video-card:hover{opacity:.88}.bili-academy .video-grid.is-search{grid-template-columns:repeat(5,1fr)}.bili-academy .video-grid.is-search .video-card:nth-child(5n+1){grid-column-start:auto}.bili-academy .video-grid.is-empty{margin-bottom:4px;min-height:0}.bili-academy .vc-cover{width:100%;aspect-ratio:16/9;background-size:cover;background-position:center;position:relative;border-radius:6px}.bili-academy .vc-cover .c-views{position:absolute;left:6px;bottom:6px;display:inline-flex;align-items:center;gap:3px;background:#0000006b;color:#fff;font-size:12px;padding:2px 6px;border-radius:3px}.bili-academy .vc-cover .c-views svg{width:13px;height:13px}.bili-academy .vc-cover .c-dur{position:absolute;right:6px;bottom:6px;background:#0000006b;color:#fff;font-size:12px;padding:2px 5px;border-radius:3px}.bili-academy .vc-body{padding:6px 2px 0;background:transparent}.bili-academy .vc-title{font-size:14px;font-weight:400;line-height:1.5;max-height:42px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;color:#18191c}.bili-academy .vc-up-row{font-size:12px;color:#9499a0;margin-top:8px;display:flex;align-items:center;gap:6px}.bili-academy .vc-up-row .up-tag{font-size:10px;color:#fff;background:#00a1d6;padding:0 4px;border-radius:2px;line-height:14px;height:14px;flex-shrink:0}.bili-academy .vc-up-row .up-name{color:#9499a0;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bili-academy .vc-up-row .up-views{color:#9499a0;display:inline-flex;align-items:center;gap:3px;flex-shrink:0}.bili-academy .vc-up-row .up-views svg{width:12px;height:12px;flex-shrink:0}.bili-academy .vc-up-row .up-date{color:#9499a0;flex-shrink:0}.bili-academy .sec-title{font-size:20px;font-weight:600;margin:28px 0 14px;display:flex;align-items:center;justify-content:space-between}.bili-academy .sec-title .st-more{font-size:13px;color:var(--sub);cursor:pointer;font-weight:400}.bili-academy .sec-title .st-more:hover{color:var(--bili)}.bili-academy .search-title{margin-top:8px;padding:4px 2px 14px;border-bottom:1px solid var(--line);font-size:16px;font-weight:400;color:var(--text);display:flex;align-items:center;justify-content:space-between}.bili-academy .search-title .st-left{display:flex;align-items:center;gap:8px}.bili-academy .search-title .st-icon{width:18px;height:18px;color:var(--sub);flex-shrink:0}.bili-academy .search-title em{color:var(--bili);font-style:normal;font-weight:700}.bili-academy .search-title .st-more{font-size:13px;color:var(--sub);font-weight:400}.bili-academy .search-title .st-right{display:flex;align-items:center;gap:14px}.bili-academy .search-title .st-clear{display:inline-flex;align-items:center;gap:4px;padding:5px 12px;font-size:13px;color:var(--sub);background:#f6f7f8;border:1px solid var(--line);border-radius:16px;cursor:pointer;transition:all .2s}.bili-academy .search-title .st-clear:hover{color:var(--bili);border-color:var(--bili);background:#fff}.bili-academy .refresh-btn{display:flex;align-items:center;gap:4px;font-size:13px;color:var(--sub);cursor:pointer;padding:4px 12px;border:1px solid var(--line);border-radius:4px;transition:all .2s}.bili-academy .refresh-btn:hover{color:var(--bili);border-color:var(--bili)}.bili-academy .hero{background:linear-gradient(135deg,#cf1322,#ff7875);border-radius:12px;padding:38px 40px;color:#fff;margin-bottom:24px}.bili-academy .hero.nav-top{margin-top:56px}.bili-academy .hero h1{font-size:28px;font-weight:700}.bili-academy .hero p{margin-top:8px;opacity:.92;font-size:15px}.bili-academy .zones{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:16px;border-bottom:1px solid var(--line);padding-bottom:12px}.bili-academy .zone{font-size:14px;color:#61666d;cursor:pointer;padding-bottom:6px}.bili-academy .zone.cur{color:var(--bili);font-weight:600;border-bottom:2px solid var(--bili)}.bili-academy .sort{display:flex;gap:14px;margin:14px 0 18px;font-size:13px;color:var(--sub)}.bili-academy .sort .cur{color:var(--bili);font-weight:600}.bili-academy .sec{font-size:18px;font-weight:600;margin:22px 0 14px;display:flex;align-items:center}.bili-academy .legend{font-size:12px;font-weight:400;color:var(--sub);margin-left:12px;display:inline-flex;align-items:center;gap:5px}.bili-academy .legend .lg{width:10px;height:10px;border-radius:3px;display:inline-block}.bili-academy .lg-collection{background:var(--bili)}.bili-academy .lg-single{background:var(--blue)}.bili-academy .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.bili-academy .card{display:block;background:transparent;border-radius:6px;overflow:hidden;cursor:pointer;transition:opacity .15s}.bili-academy .card:hover{opacity:.88}.bili-academy .cover{width:100%;aspect-ratio:16/9;background:linear-gradient(135deg,#e3e5e7,#f1f2f3);background-size:cover;background-position:center;position:relative;border-radius:6px}.bili-academy .cover .dur{position:absolute;right:6px;bottom:6px;background:#0009;color:#fff;font-size:11px;padding:1px 4px;border-radius:3px}.bili-academy .body{padding:6px 2px 0}.bili-academy .ct{font-size:14px;font-weight:400;line-height:1.5;max-height:42px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;color:#18191c}.bili-academy .up-row{font-size:12px;color:#9499a0;margin-top:8px;display:flex;align-items:center;gap:6px}.bili-academy .up-row .up-tag{font-size:10px;color:#fff;background:#00a1d6;padding:0 4px;border-radius:2px;line-height:14px;height:14px;flex-shrink:0}.bili-academy .up-row .up-tag.studying{background:#ff8f3f}.bili-academy .up-row .up-tag.done{background:#4ebd6a}.bili-academy .up-row .up-tag.idle{background:#9499a0}.bili-academy .up-row .up-name{color:#9499a0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bili-academy .up-row .up-date{color:#9499a0;flex-shrink:0}.bili-academy .row{display:flex;gap:24px}.bili-academy .left{flex:1;min-width:0}.bili-academy .right{width:360px;flex-shrink:0}.bili-academy .panel{background:#fff;border-radius:8px;padding:14px}.bili-academy .panel.related-box{border:none;background:#f1f2f3}.bili-academy .not-found{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:120px 20px 80px;color:#9499a0;text-align:center}.bili-academy .not-found .nf-title{font-size:20px;font-weight:600;color:var(--text);margin-top:18px}.bili-academy .not-found .nf-sub{font-size:14px;margin-top:8px}.bili-academy .not-found .nf-btn{margin-top:28px;padding:9px 28px;border:none;border-radius:6px;background:var(--bili);color:#fff;font-size:14px;cursor:pointer;transition:opacity .2s}.bili-academy .not-found .nf-btn:hover{opacity:.85}.bili-academy .ph{font-size:15px;font-weight:600;margin-bottom:12px;display:flex;justify-content:space-between;align-items:center}.bili-academy .ph span{font-size:12px;color:var(--sub);font-weight:400}.bili-academy .item{display:flex;gap:10px;padding:8px;border-radius:6px;cursor:pointer;align-items:center}.bili-academy .item:hover{background:#f6f7f8}.bili-academy .item.cur{background:#fdeaea}.bili-academy .item.cur .i-title{color:var(--bili)}.bili-academy .thumb{width:112px;height:63px;border-radius:4px;background:linear-gradient(135deg,#e3e5e7,#f1f2f3);background-size:cover;background-position:center;flex-shrink:0;position:relative;overflow:hidden}.bili-academy .thumb .dur{position:absolute;right:4px;bottom:4px;background:#0009;color:#fff;font-size:11px;padding:1px 4px;border-radius:3px}.bili-academy .i-main{flex:1;min-width:0}.bili-academy .i-title{font-size:13px;color:#18191c;line-height:1.4}.bili-academy .i-sub{font-size:12px;color:var(--sub);margin-top:4px}.bili-academy .tags{display:flex;gap:10px;margin:14px 0;flex-wrap:wrap}.bili-academy .tag{position:relative;font-size:12px;color:#d6336c;background:linear-gradient(135deg,#fff0f3,#ffe3ea);border:1px solid rgba(214,51,108,.15);border-radius:999px;padding:4px 14px 4px 22px;cursor:pointer;transition:transform .2s,box-shadow .2s}.bili-academy .tag:before{content:"";position:absolute;left:11px;top:50%;transform:translateY(-50%);width:6px;height:6px;border-radius:50%;background:#ff4d6d}.bili-academy .tag:hover{transform:translateY(-1px);box-shadow:0 4px 12px #ff4d6d33}.bili-academy .learn-btn{display:block;text-align:center;background:var(--bili);color:#fff;font-size:16px;font-weight:600;padding:12px;border-radius:8px;margin-top:14px}.bili-academy .vtitle{font-size:20px;font-weight:600;line-height:1.4}.bili-academy .vtitle .tb{display:inline-block;font-size:12px;font-weight:600;padding:2px 9px;border-radius:4px;vertical-align:middle;margin-left:10px;color:#fff}.bili-academy .tb-collection{background:var(--bili)}.bili-academy .tb-single{background:var(--blue)}.bili-academy .player{position:relative;background:#000;width:100%;aspect-ratio:16/9;max-height:70vh;margin-top:8px;display:flex;align-items:center;justify-content:center;overflow:hidden}.bili-academy .play{width:60px;height:60px;border-radius:50%;background:#cf1322e6;display:flex;align-items:center;justify-content:center;color:#fff;font-size:26px;cursor:pointer}.bili-academy .btn{padding:6px 16px;border:1px solid #d0d3d6;border-radius:6px;background:#fff;cursor:pointer;font-size:14px;display:inline-flex;align-items:center;gap:5px;color:#61666d;transition:all .2s}.bili-academy .bar .btn{padding:7px 18px;border:1px solid #e3e6ea;border-radius:999px;box-shadow:0 1px 3px #0000000a}.bili-academy .bar .btn svg{width:15px;height:15px;flex-shrink:0}.bili-academy .bar .btn:hover{border-color:var(--bili);color:var(--bili);transform:translateY(-1px);box-shadow:0 4px 12px #cf132224}.bili-academy .btn.primary{background:var(--bili);border-color:var(--bili);color:#fff}.bili-academy .btn.liked{border-color:#f5c518;color:#f5c518;background:#fffdf5}.bili-academy .btn.liked:hover{border-color:#f0b90b;color:#f0b90b;box-shadow:0 4px 12px #f5c51838}.bili-academy .catalog{background:#fff;border-radius:8px;padding:16px 20px 12px;margin-top:16px}.bili-academy .catalog .ch{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:#61666d;background:#f7f8fa;border-radius:8px;padding:10px 12px;margin:10px 0 4px;cursor:pointer;user-select:none}.bili-academy .catalog .ch:hover{color:var(--bili);background:#f2f3f5}.bili-academy .catalog .ch .ch-arrow{width:7px;height:7px;border-right:2px solid #c9ccd0;border-bottom:2px solid #c9ccd0;transform:rotate(-45deg);transition:transform .2s;flex-shrink:0}.bili-academy .catalog .ch.open .ch-arrow{transform:rotate(45deg)}.bili-academy .catalog .ch .ch-count{margin-left:auto;font-weight:400;color:#c9ccd0;font-size:12px}.bili-academy .catalog .les{display:flex;align-items:center;gap:10px;border-top:none;border-radius:6px;padding:10px 12px 10px 44px;margin:0 -12px;font-size:14px;color:#18191c;transition:background .15s;cursor:pointer}.bili-academy .catalog .les:hover{background:#f6f7f8;color:var(--bili)}.bili-academy .catalog .les.cur{background:#fdeaea;color:#18191c;font-weight:500}.bili-academy .catalog .dot{position:relative;width:18px;height:18px;border-radius:50%;background:#eef0f2;flex-shrink:0}.bili-academy .catalog .dot:after{content:"";position:absolute;left:7px;top:5px;border-left:5px solid #9499a0;border-top:4px solid transparent;border-bottom:4px solid transparent}.bili-academy .catalog .les:hover .dot,.bili-academy .catalog .les.cur .dot{background:#fdeaea}.bili-academy .catalog .les:hover .dot:after,.bili-academy .catalog .les.cur .dot:after{border-left-color:var(--bili)}.bili-academy .intro{background:#fff;border-radius:8px;padding:16px;margin-top:14px;font-size:14px;line-height:1.7;color:#61666d}.bili-academy .teacher{display:flex;align-items:center;gap:12px}.bili-academy .teacher .t-av{width:48px;height:48px;max-width:48px;max-height:48px;border-radius:50%;object-fit:cover;flex-shrink:0;background:#f1f2f3;display:block}.bili-academy .ov{margin-left:calc(50% - 50vw);margin-right:calc(50% - 50vw);margin-bottom:0;background-image:linear-gradient(180deg,#b2e5fa00 74%,#b2e5fa73 86%,#aae0f7eb 95%,#a5ddf6),url(/portal/covers/my-stats-bg.jpg);background-size:cover;background-position:center;display:flex;align-items:center;justify-content:center;min-height:120px;padding:8px 16px 0}.bili-academy .ov-in{display:flex;gap:60px;max-width:1200px;margin:0 auto;justify-content:center}.bili-academy .wrap.my-wrap{min-height:calc(100vh + 56px)}.bili-academy .ovc{flex:0 0 180px;background:#ffffff59;border-radius:12px;padding:10px 14px;display:flex;flex-direction:column;align-items:center;gap:4px}.bili-academy .ov-ic{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}.bili-academy .ov-ic svg{width:18px;height:18px}.bili-academy .ovc .ov-r{text-align:center}.bili-academy .ovc .ov-r .n{font-size:20px;font-weight:700;line-height:1.1}.bili-academy .ovc .ov-r .l{font-size:13px;color:var(--sub);margin-top:2px}.bili-academy .ov-blue .ov-ic{background:#e8f1ff;color:#2563eb}.bili-academy .ov-green .ov-ic{background:#e8f9ee;color:#16a34a}.bili-academy .ov-orange .ov-ic{background:#fff3e0;color:#ea8a00}.bili-academy .ov-red .ov-ic{background:#fde8ea;color:var(--bili)}.bili-academy .ov-blue .n{color:#2563eb}.bili-academy .ov-green .n{color:#16a34a}.bili-academy .ov-orange .n{color:#ea8a00}.bili-academy .ov-red .n{color:var(--bili)}.bili-academy .cover .cl{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#9499a0;font-size:13px}.bili-academy .crumb{font-size:13px;color:var(--sub);margin-bottom:14px}.bili-academy .crumb a{color:var(--sub)}.bili-academy .crumb a:hover{color:var(--bili)}.bili-academy .crumb .sep{margin:0 8px}.bili-academy .search{display:flex;margin:18px 0 6px}.bili-academy .search input{flex:1;height:40px;border:1px solid var(--line);border-radius:6px 0 0 6px;padding:0 14px;font-size:14px;outline:none}.bili-academy .search button{width:80px;background:var(--bili);color:#fff;border:none;border-radius:0 6px 6px 0;cursor:pointer;font-size:14px}.bili-academy .ov+.tabs{margin-top:14px}.bili-academy .tabs{display:flex;gap:4px;align-items:center;position:relative;margin-bottom:14px;border-bottom:1px solid #eef0f2}.bili-academy .tabs .t{font-size:15px;color:#61666d;cursor:pointer;padding:9px 16px;display:inline-flex;align-items:center;gap:6px;transition:color .25s;position:relative}.bili-academy .tabs .t svg{width:18px;height:18px;flex-shrink:0;transition:color .25s}.bili-academy .tabs .t:hover{color:var(--bili)}.bili-academy .tabs .t.cur{color:var(--bili);font-weight:600}.bili-academy .tabs .t .t-count{font-size:12px;font-weight:400;color:#9499a0;margin-left:2px}.bili-academy .tabs .t:after{content:"";position:absolute;left:16px;right:16px;bottom:-1px;height:3px;border-radius:3px;background:var(--bili);transform:scaleX(0);opacity:0;transition:transform .35s cubic-bezier(.4,0,.2,1),opacity .3s}.bili-academy .tabs .t.cur:after{transform:scaleX(1);opacity:1}.bili-academy .tabs .t.ic-blue svg{color:#2563eb}.bili-academy .tabs .t.ic-red svg{color:#e5484d}.bili-academy .tabs .t.ic-green svg{color:#16a34a}.bili-academy .tabs .t.ic-orange svg{color:#ea8a00}.bili-academy .tabs .t.cur.ic-blue svg{color:#2563eb}.bili-academy .tabs .t.cur.ic-red svg{color:#e5484d}.bili-academy .tabs .t.cur.ic-green svg{color:#16a34a}.bili-academy .tabs .t.cur.ic-orange svg{color:#ea8a00}.bili-academy .tab-ind{position:absolute;bottom:0;left:0;width:0;height:3px;border-radius:3px;background:var(--bili);transition:left .35s cubic-bezier(.4,0,.2,1),width .35s cubic-bezier(.4,0,.2,1);pointer-events:none}.bili-academy .pager{display:flex;align-items:center;justify-content:center;gap:8px;margin:24px 0 4px}.bili-academy .pager .pg{min-width:32px;height:32px;padding:0 8px;border-radius:6px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;color:#61666d;background:#fff;border:1px solid var(--line);cursor:pointer;user-select:none;transition:color .2s,border-color .2s,background .2s}.bili-academy .pager .pg:hover:not(.cur):not(.off){color:var(--bili);border-color:var(--bili)}.bili-academy .pager .pg.cur{color:#fff;background:var(--bili);border-color:var(--bili);font-weight:600}.bili-academy .pager .pg.off{opacity:.4;cursor:not-allowed}.bili-academy .hl-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:72px 0;color:var(--sub)}.bili-academy .hl-empty .hl-empty-icon{width:96px;height:96px;border-radius:50%;background:#f4f5f7;color:#c3c6cc;display:flex;align-items:center;justify-content:center;margin-bottom:16px}.bili-academy .hl-empty .hl-empty-text{font-size:14px}.bili-academy .hl-empty.stream-empty{position:relative;overflow:hidden;width:100%;height:120px;border-radius:12px;background:url(/portal/covers/empty-courses-illustration.jpg) center / cover no-repeat;box-shadow:inset 0 0 0 1px #788ca01f;padding:0;flex-direction:row}.bili-academy .hl-empty.stream-empty .hl-empty-text{position:relative;z-index:2;font-size:15px;color:#6b4f8f;font-weight:600;letter-spacing:1px;margin:0;padding:9px 24px;background:#fff9;border-radius:22px;line-height:1.3;white-space:nowrap}.bili-academy .empty-float-star{position:absolute;z-index:2;font-size:18px;color:#f7b576;opacity:.85;animation:floatStar 3s ease-in-out infinite;pointer-events:none}.bili-academy .empty-float-star.s1{left:22%;top:22%;animation-delay:0s}.bili-academy .empty-float-star.s2{right:22%;bottom:20%;font-size:14px;color:#f093b0;animation-delay:1.2s}@keyframes floatStar{0%,to{transform:translateY(0) scale(1);opacity:.8}50%{transform:translateY(-7px) scale(1.15);opacity:1}}.bili-academy .empty-airplane{position:absolute;z-index:2;left:6%;top:38%;font-size:16px;opacity:0;transform:rotate(-8deg);animation:flyAcross 5s ease-in-out infinite;pointer-events:none}@keyframes flyAcross{0%{transform:translate(0) rotate(-8deg);opacity:0}12%{opacity:.9}45%{transform:translate(280px,-20px) rotate(6deg);opacity:.9}60%{transform:translate(360px,-28px) rotate(10deg);opacity:0}to{transform:translate(360px,-28px) rotate(10deg);opacity:0}}.bili-academy .hl-end{padding:28px 0;text-align:center;font-size:13px;color:var(--sub)}.bili-academy .filter{display:flex;gap:10px;flex-wrap:wrap;margin:10px 0 18px}.bili-academy .filter .ft{font-size:12px;color:#61666d;background:#fff;border:1px solid var(--line);border-radius:14px;padding:4px 14px;cursor:pointer}.bili-academy .filter .ft.cur{color:#fff;background:var(--bili);border-color:var(--bili)}.bili-academy .sub{font-size:13px;color:var(--sub);margin-top:4px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}.bili-academy .sub .sub-item{display:inline-flex;align-items:center;gap:5px}.bili-academy .sub .sub-item svg{width:14px;height:14px;flex-shrink:0}.bili-academy .sub .av{width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,#cf1322,#ff7875)}.bili-academy .bar{display:flex;gap:12px;margin-top:18px;margin-bottom:14px}.bili-academy .mini{font-size:13px;color:var(--sub);background:#f6f7f8;border-radius:6px;padding:8px 12px}.bili-academy .mini b{color:var(--text)}.bili-academy .rec-item{background:#fff;border-radius:8px;padding:12px 16px;margin-bottom:10px;font-size:14px;display:flex;gap:14px;align-items:center}.bili-academy .rec-item .rt{color:var(--sub);font-size:12px;width:90px;flex-shrink:0}.bili-academy .rec-item .rc{color:var(--text);cursor:pointer}.bili-academy .rec-item .rc:hover{color:var(--bili)}.bili-academy .tabpane{display:none}.bili-academy .tabpane.show{display:block;animation:tabFloat .4s cubic-bezier(.22,1,.36,1)}@keyframes tabFloat{0%{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}.bili-academy .switch{width:38px;height:20px;border-radius:12px;background:#d0d3d6;position:relative;cursor:pointer;transition:background .2s;flex-shrink:0;display:inline-block;vertical-align:middle}.bili-academy .switch.on{background:var(--bili)}.bili-academy .switch:after{content:"";position:absolute;top:2px;left:2px;width:16px;height:16px;border-radius:50%;background:#fff;transition:left .2s}.bili-academy .switch.on:after{left:20px}.bili-academy .note-box{width:100%;height:90px;border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-size:14px;resize:none;outline:none;font-family:inherit}.bili-academy .note-box:focus{border-color:var(--bili)}.bili-academy .mind{background:#fff;border-radius:8px;padding:20px}.bili-academy .mind .center{display:inline-block;background:var(--bili);color:#fff;padding:8px 16px;border-radius:6px;font-weight:600;font-size:15px}.bili-academy .mind .branch{margin-top:14px;display:flex;flex-direction:column;gap:10px;padding-left:22px;border-left:2px dashed var(--line)}.bili-academy .mind .node{background:#f6f7f8;border-radius:6px;padding:9px 12px;font-size:14px}.bili-academy .modal-mask{display:none;position:fixed;inset:0;background:#00000080;z-index:200;align-items:center;justify-content:center}.bili-academy .modal-mask.show{display:flex}.bili-academy .qr-modal{background:#fff;border-radius:12px;padding:24px;width:320px;text-align:center;box-shadow:0 8px 24px #00000026}.bili-academy .qr-modal h3{font-size:16px;margin-bottom:16px}.bili-academy .qr-modal img{width:200px;height:200px;border-radius:8px;margin-bottom:10px}.bili-academy .qr-modal p{font-size:13px;color:var(--sub);margin-bottom:16px}.bili-academy .qr-modal .close{display:inline-block;padding:6px 20px;border:1px solid var(--line);border-radius:6px;cursor:pointer;font-size:14px}.bili-academy .qr-card{background:#fff;border-radius:8px;padding:16px;text-align:center;margin-top:16px}.bili-academy .qr-card .ph{display:block;text-align:center;margin-bottom:12px}.bili-academy .qr-card img{width:170px;height:170px;border-radius:6px;margin-bottom:12px}.bili-academy .qr-card .btn-row{display:flex;flex-direction:column;gap:8px}.bili-academy .qr-card .btn-block{display:block;width:100%;text-align:center;padding:10px;border-radius:6px;font-size:14px;cursor:pointer;border:1px solid transparent}.bili-academy .qr-card .btn-primary{background:var(--bili);color:#fff}.bili-academy .qr-card .btn-outline{background:#fff;color:var(--bili);border-color:var(--bili)}.bili-academy .teacher .msg-btn{margin-left:auto;padding:6px 16px;border-radius:20px;background:#fff;color:var(--bili);border:1px solid var(--bili);font-size:13px;cursor:pointer;white-space:nowrap;flex-shrink:0}.bili-academy .load-more{display:flex;align-items:center;justify-content:center;gap:10px;padding:30px 0}.bili-academy .load-more.hidden{display:none}.bili-academy .load-spinner{width:20px;height:20px;border:2px solid var(--line);border-top-color:var(--bili);border-radius:50%;animation:spin .8s linear infinite}.bili-academy .load-arrow{font-size:18px;color:var(--sub);line-height:1;animation:bounceDown 1.6s ease-in-out infinite}@keyframes bounceDown{0%,to{transform:translateY(-3px)}50%{transform:translateY(3px)}}.bili-academy .load-text{font-size:13px;color:var(--sub)}.bili-academy .end-line{width:52px;height:1px;background:linear-gradient(90deg,transparent,var(--line))}.bili-academy .end-line.right{background:linear-gradient(90deg,var(--line),transparent)}.bili-academy .end-icon{width:16px;height:16px;color:#c3c6cc;flex-shrink:0}.bili-academy .end-text{font-size:13px;color:#c3c6cc;letter-spacing:1px}@keyframes spin{to{transform:rotate(360deg)}}.bili-academy .bili-tags{background:#fff;border:none;border-radius:0;padding:12px 24px 12px 92px;position:sticky;top:56px;z-index:40}.bili-academy .bili-tags .bili-tags-inner{max-width:1920px;margin:0 auto}.bili-academy .bili-tags .tags-row{display:grid;grid-template-columns:repeat(11,minmax(0,1fr)) 56px;gap:10px 12px;align-items:stretch}.bili-academy .bili-tags .tags-row+.tags-row{margin-top:10px}.bili-academy .bili-tags .tags-spacer{visibility:hidden}@media (max-width: 1400px){.bili-academy .bili-tags .tags-row{grid-template-columns:repeat(8,minmax(0,1fr)) 48px}.bili-academy .bili-tags .tags-spacer{display:none}}.bili-academy .bili-tags.is-sticky{background:#fff;box-shadow:0 2px 8px #00000014}.bili-academy .bili-tag{font-size:13px;color:#61666d;background:#f1f2f3;border:1px solid #e3e5e7;border-radius:6px;padding:5px 10px;cursor:pointer;transition:all .2s;white-space:nowrap;text-align:center;overflow:hidden;text-overflow:ellipsis}.bili-academy .bili-tag:hover{border-color:var(--bili);color:var(--bili);background:#fdeaea}.bili-academy .bili-tag.cur{color:var(--bili);background:#fff;border-color:var(--bili);font-weight:600}.bili-academy .bili-tag.more-btn{background:#f1f2f3;color:#61666d;border-color:#e3e5e7}.bili-academy .bili-tag.more-btn:hover{border-color:var(--bili);color:var(--bili);background:#fdeaea}.bili-academy .bili-tag.more-btn .arrow{font-size:10px;margin-left:3px;display:inline-block;transform:translateY(-1px)}.bili-academy .more-panel{display:none;position:fixed;z-index:999;background:#fff;border-radius:8px;border:1px solid var(--line);box-shadow:0 4px 16px #0000001f;padding:16px;gap:24px;max-width:600px}.bili-academy .more-panel.show{display:flex}.bili-academy .more-panel-col{display:flex;flex-direction:column;gap:8px;min-width:100px}.bili-academy .more-item{font-size:13px;color:#18191c;padding:6px 12px;border-radius:4px;cursor:pointer;transition:all .2s;white-space:nowrap}.bili-academy .more-item:hover{background:#f1f2f3;color:var(--bili)}.bili-academy .more-item.cur{color:var(--bili);background:#fdeaea}.bili-academy .history-page{padding:8px 0 40px}.bili-academy .history-list{--tl-w: 32px;--dot: 16px;--anchor-gap: 40px;position:relative;padding-left:96px}.bili-academy .tl-item{position:relative;display:flex;align-items:stretch}.bili-academy .tl-label{position:absolute;top:0;right:100%;height:100%;padding-right:16px;display:flex;align-items:flex-start;padding-top:15px}.bili-academy .tl-date{font-size:14px;font-weight:600;color:#18191c;white-space:nowrap}.bili-academy .tl-anchor{position:relative;width:var(--tl-w);flex-shrink:0;margin-right:var(--anchor-gap);display:flex;justify-content:center}.bili-academy .tl-anchor:before{content:"";position:absolute;top:0;bottom:0;width:2px;background:#e3e5e7}.bili-academy .tl-dot{position:absolute;top:14px;width:var(--dot);height:var(--dot);border-radius:50%;background:#fff;border:2px solid #c9ccd0;box-sizing:border-box;transition:all .2s;z-index:2}.bili-academy .tl-anchor.is-end:before{bottom:auto;height:14px}.bili-academy .tl-item.cur .tl-dot{border-color:var(--bili);background:var(--bili)}.bili-academy .tl-item.cur .tl-date{color:var(--bili)}.bili-academy .tl-item.cur .tl-anchor:before{background:var(--bili)}.bili-academy .tl-content{flex:1;min-width:0;padding-bottom:32px}.bili-academy .tl-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px 20px}.bili-academy .hl-item{display:flex;flex-direction:column;border-radius:6px;transition:transform .2s;cursor:pointer}.bili-academy .hl-item:hover{transform:translateY(-3px)}.bili-academy .hl-cover{width:100%;aspect-ratio:16/9;border-radius:6px;background-size:cover;background-position:center;position:relative;overflow:hidden;background-color:#e3e5e7;background-image:url(/portal/covers/cover-vite.png)}.bili-academy .hl-status{position:absolute;left:4px;top:4px;background:#0009;color:#fff;font-size:11px;padding:1px 5px;border-radius:3px;z-index:2}.bili-academy .hl-dur{position:absolute;right:4px;bottom:4px;background:#000000b3;color:#fff;font-size:11px;padding:1px 4px;border-radius:3px;z-index:2}.bili-academy .hl-progress{position:absolute;left:0;bottom:0;right:0;height:3px;background:#0003;z-index:1}.bili-academy .hl-progress-bar{height:100%;background:var(--bili);border-radius:0 2px 2px 0}.bili-academy .hl-info{padding:8px 0 0;position:relative}.bili-academy .hl-title{font-size:13px;font-weight:400;color:#18191c;line-height:1.45;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;padding-right:18px}.bili-academy .hl-del{position:absolute;right:-2px;top:8px;width:16px;height:16px;color:#9499a0;cursor:pointer;font-size:14px;line-height:16px;text-align:center;display:none}.bili-academy .hl-item:hover .hl-del{display:block}.bili-academy .hl-del:hover{color:var(--bili)}.bili-academy .hl-meta{display:flex;align-items:center;gap:6px;font-size:12px;color:#9499a0}.bili-academy .hl-meta .dot{width:2px;height:2px;border-radius:50%;background:#9499a0}.bili-academy .hl-up,.bili-academy .hl-time{display:flex;align-items:center;gap:2px}.bili-academy .back-to-top{position:fixed;right:24px;bottom:24px;width:40px;height:60px;background:#fff;border-radius:8px;box-shadow:0 2px 12px #0000001f;display:flex;align-items:center;justify-content:center;font-size:12px;color:#61666d;cursor:pointer;opacity:0;visibility:hidden;transition:all .2s;z-index:90;writing-mode:vertical-rl;letter-spacing:2px}.bili-academy .back-to-top.show{opacity:1;visibility:visible}.bili-academy .back-to-top:hover{color:var(--bili)}html,body{margin:0;padding:0;height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#0000001a;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#0003}#app{height:100%}.ant-table-cell{word-break:break-all}.layout{min-height:100vh}.passport-layout{min-height:100vh;display:flex;align-items:center;justify-content:center;background:#f0f2f5}.passport-container{width:100%;max-width:400px;padding:24px}.header-item{display:inline-flex;align-items:center;padding:0 12px;cursor:pointer;transition:all .3s}.header-item:hover{background:#00000006}.qr-code-container{display:flex;align-items:center;justify-content:center;width:200px;height:200px;margin:0 auto}.social-login-icons{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:16px}.social-icon{width:36px;height:36px;cursor:pointer;transition:transform .3s}.social-icon:hover{transform:scale(1.1)}.password-policy h2{font-size:16px;margin-bottom:16px}.password-policy ul{list-style:none;padding:0}.password-policy ul li{padding:4px 0;font-size:13px}.password-policy ul li.valid{color:#52c41a}.password-policy ul li.invalid{color:#ff4d4f}