:root{font-family:DM Sans,-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,sans-serif;color:#25334b;background:#f6f8fc;font-synthesis:none;font-size:14px;--blue:#4169de;--muted:#8691a4;--line:#e9edf4;--radius:14px}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button{border:0;background:none;color:inherit}button:disabled{opacity:.4;cursor:not-allowed}button,a{transition:background .18s,color .18s,box-shadow .18s,transform .18s}button:focus-visible,a:focus-visible{outline:3px solid #97b5ff;outline-offset:4px}input:focus,textarea:focus,select:focus{outline:2px solid #b6c8fb;outline-offset:1px}svg{flex-shrink:0;vertical-align:middle}h1,h2,h3,p{margin:0}p{line-height:1.8}h1{font-size:32px;letter-spacing:-1.3px;font-weight:650;line-height:1.5}h2{font-size:20px;font-weight:600}h3{font-size:16px;font-weight:600}.shell{min-height:100vh}.sidebar{width:224px;background:#fff;border-right:1px solid var(--line);height:100vh;position:fixed;inset:0 auto 0 0;padding:34px 20px 0;display:flex;flex-direction:column;z-index:25}.brand{display:flex;align-items:center;gap:12px;padding:0 10px;font-weight:750;font-size:25px;letter-spacing:2px}.brand-icon{background:var(--blue);color:#fff;width:43px;height:45px;display:grid;place-items:center;border-radius:13px 13px 13px 3px;box-shadow:0 5px 12px #4169de20}.brand-en{font-size:9px;letter-spacing:1.6px;display:block;color:#8691a4;font-weight:600;margin-top:1px}.course-switch{margin-top:38px;background:#f7f9fd;border:1px solid #e9edf5;border-radius:10px;padding:12px 10px;display:flex;align-items:center;gap:9px}.course-switch>b{font-size:14px}.course-switch small{display:block;font-size:12px;color:#8a95a7;margin-top:4px}.course-switch>svg{margin-left:auto;color:#95a0b1}.course-symbol{color:var(--blue);display:grid;place-items:center;width:32px}.nav-label{font-size:12px;letter-spacing:1px;color:#a0a9b9;margin:32px 13px 12px}nav{display:flex;flex-direction:column;gap:7px}nav a{display:flex;align-items:center;gap:12px;padding:14px 15px;border-radius:9px;color:#6c7890}nav a:hover{background:#f6f8fc}nav a.active{background:#edf2ff;color:var(--blue);font-weight:600}nav a.active:before{content:"";position:absolute;left:0;width:3px;height:23px;background:var(--blue);border-radius:0 4px 4px 0}.new-dot{margin-left:auto;width:5px;height:5px;background:#e8b874;border-radius:50%}.sidebar-bottom{margin-top:auto}.semester-card{padding:18px 13px;margin-bottom:22px;border:1px solid #e6edf9;border-radius:12px;background:linear-gradient(135deg,#f7f9ff,#fff)}.semester-card>div{font-size:12px;font-weight:600}.tiny-spark{font-size:20px;color:#7394e8;margin-right:5px}.semester-card p{font-size:12px;color:#8a95a7;margin:10px 0 14px}.semester-card button{font-size:12px;color:var(--blue);padding:0;display:flex;align-items:center;gap:25px}.user{display:flex;align-items:center;gap:10px;padding:20px 0;border-top:1px solid var(--line)}.user b{font-size:12px}.user small{display:block;color:#9aa4b4;font-size:11px;margin-top:4px}.online{width:6px;height:6px;border-radius:50%;background:#57b298;margin-left:auto}.avatar{display:inline-grid;place-items:center;width:25px;height:25px;border-radius:50%;background:#eaf0fc;color:#5b7dcb;font-size:11px;flex-shrink:0}.avatar.my{background:#e6ecff;color:#657dd1;width:34px;height:34px;font-size:13px}.avatar.small{width:30px;height:30px}.avatar.wiki{background:#e5f3ee;color:#4d9b86}.avatar.quiz{background:#f8ecdc;color:#bb8e50}.avatar.code{background:#eeeafd;color:#8d7db5}.main-shell{margin-left:224px}.topbar{height:76px;border-bottom:1px solid var(--line);background:#ffffffc9;display:flex;justify-content:space-between;align-items:center;padding:0 40px}.breadcrumb{display:flex;align-items:center;gap:14px;font-size:12px;color:#98a2b3}.breadcrumb b{color:#536079;font-weight:500}.top-right{display:flex;align-items:center;gap:20px}.demo-pill{font-size:11px;color:#75839a;display:flex;align-items:center;gap:7px}.demo-pill>span{width:5px;height:5px;border-radius:50%;background:#6aae9c}.top-divider{height:17px;width:1px;background:var(--line)}main{max-width:1530px;padding:38px 40px 0;margin:auto}.page-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:27px;gap:20px}.eyebrow{font-size:10px;font-weight:650;letter-spacing:2.3px;color:#8a99b2;margin-bottom:9px;display:block}.heading-dot{color:var(--blue);margin-left:4px}.page-heading p{margin-top:8px;font-size:13px;color:#8b96a8}.primary,.secondary{display:inline-flex;justify-content:center;align-items:center;gap:8px;padding:12px 19px;border-radius:8px;font-size:13px;font-weight:550;white-space:nowrap}.primary{background:var(--blue);color:#fff;box-shadow:0 4px 9px #4169de16}.primary:hover{background:#345bd0;transform:translateY(-1px)}.secondary{background:#fff;border:1px solid #e2e7f0;color:#66738c}.secondary:hover{background:#f0f4fc;border-color:#cbd7f3}.full{display:flex;width:100%}.intro-band{border:1px solid #e1e9f8;background:linear-gradient(105deg,#edf3ff,#f2f6ff 55%,#edf3ff);min-height:98px;padding:20px 24px;border-radius:12px;display:flex;align-items:center;gap:18px;position:relative;overflow:hidden}.intro-symbol{background:#ffffffae;border:1px solid #fff;border-radius:14px;width:53px;height:53px;color:#7794df;display:grid;place-items:center}.intro-band b{font-size:15px;font-weight:600;color:#466085}.intro-band p{font-size:12px;color:#8395b3;margin-top:6px}.intro-count{margin-left:auto;display:flex;align-items:center;gap:10px;padding-right:100px;z-index:1}.intro-count strong{font-size:29px;color:#5e7bb6;font-weight:500}.intro-count span{color:#8899b5;font-size:11px;width:25px}.intro-decoration{position:absolute;right:22px;top:7px;font-family:Georgia,serif;font-size:82px;font-style:italic;color:#d8e4fa;transform:rotate(-8deg)}.intro-decoration span{position:absolute;font-size:23px;top:59px;right:58px;color:#cbdaf5}.discovery-toolbar{margin-top:28px;border-bottom:1px solid #e3e8f1}.tabs{display:flex;align-items:center;gap:24px}.tabs button{padding:15px 0 17px;display:flex;align-items:center;gap:7px;font-size:13px;color:#7e899d;position:relative;white-space:nowrap}.tabs button.selected{color:var(--blue);font-weight:600}.tabs button.selected:after{content:"";height:2px;border-radius:4px;background:var(--blue);position:absolute;bottom:-1px;left:0;right:0}.tabs button>span{background:#e9efff;font-size:10px;min-width:21px;border-radius:5px;padding:2px 5px}.filter-row{display:flex;align-items:center;justify-content:space-between;margin:23px 0 27px;gap:20px}.search{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid #e6eaf1;border-radius:8px;padding:10px 12px;width:340px;color:#9aa6ba}.search input{border:0;background:transparent;min-width:0;width:100%;font-size:12px;color:#53627b;outline:0}input::placeholder,textarea::placeholder{color:#a2acbc}.filters{display:flex;align-items:center;gap:17px;color:#8390a5}.filter-toggle{display:flex;align-items:center;gap:6px;font-size:12px}.filter-toggle.on{color:#b58b41}.sort{display:flex;align-items:center;gap:8px;border-left:1px solid #e1e7f0;padding-left:18px}select{border:0;background:transparent;color:#7d889c;font-size:12px;padding:5px;cursor:pointer}.section-line{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.section-line h2{font-size:15px}.section-line h2 span{font-size:11px;color:#99a3b3;margin-left:10px;font-weight:400}.muted{color:#a2acbd;font-size:11px}.work-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:23px 22px}.work-card{background:#fff;border:1px solid #e7ebf2;border-radius:12px;overflow:hidden;transition:transform .2s,box-shadow .2s}.work-card:hover{transform:translateY(-4px);box-shadow:0 12px 30px #36517d0c}.art-link{display:block;position:relative;padding:8px 8px 0}.art{padding:17px 17px 11px;height:190px;border-radius:7px;overflow:hidden;position:relative;background:#edf2fc;color:#5273ac;-webkit-user-select:none;user-select:none}.art-label,.art-bottom{display:flex;justify-content:space-between;font-size:7px;letter-spacing:1.1px;align-items:center}.art-label{font-weight:650;opacity:.7}.art-label span{font-size:6px;letter-spacing:.7px}.slide-art{display:flex;align-items:center;height:132px}.slide-art>div{position:relative;z-index:1;flex:1;min-width:0}.slide-art small{font-size:9px;color:#7c95be;letter-spacing:2px}.slide-art h3{font-size:17px;letter-spacing:-.5px;white-space:nowrap;margin:10px 0}.slide-art p{font-size:6px;letter-spacing:1.1px;white-space:nowrap}.slide-art svg{width:42%;max-width:128px;margin-right:-10px}.art-bottom{font-size:7px;opacity:.72;border-top:1px solid #5273ac20;padding-top:9px;letter-spacing:.5px}.art-bottom span{font-size:6px}.art.wiki{background:#eaf5ef;color:#497565}.tree-art{height:132px;padding-top:21px;max-width:250px;margin:auto;position:relative}.tree-node{border:1px solid #8eb8a582;background:#f7fcf8;box-shadow:0 3px 4px #54857107;border-radius:4px;font-size:8px;padding:6px 12px;text-align:center;z-index:1;position:relative}.tree-node.root{width:100px;margin:auto;background:#d8eee2;font-weight:600}.branches{display:flex;justify-content:center;gap:43px;position:relative;margin-top:18px}.branches:before{position:absolute;content:"";top:-11px;width:132px;height:12px;border:1px solid #95bba7;border-bottom:0}.branches:after{content:"";position:absolute;width:1px;height:8px;background:#95bba7;top:-18px}.branches .tree-node{padding:5px 9px}.leaves{display:flex;justify-content:space-evenly;margin-top:13px}.leaves i{width:17px;height:10px;border:1px solid #b2ccbd;border-radius:3px;background:#d7eadd;position:relative}.leaves i:before{position:absolute;content:"";width:1px;height:13px;top:-14px;left:7px;background:#b2ccbd}.art.code{background:#f0edf9;color:#777099}.code-art{height:132px;padding-top:16px;font-family:ui-monospace,SFMono-Regular,monospace}.code-art p{font-size:9px;line-height:1.75;white-space:nowrap}.code-art em{font-style:normal;color:#b8b1cb;margin-right:13px;font-size:8px}.code-art b{font-weight:500;color:#8b68bd}.code-art strong{font-weight:400;color:#c09764}.art-label .dots{letter-spacing:3px;color:#b6a7ce;font-size:8px}.art.quiz{background:#fcf3e8;color:#a28359}.quiz-art{height:132px;padding-top:15px}.quiz-art small{font-size:8px;letter-spacing:1px}.quiz-art h3{font-size:16px;line-height:1.7;color:#8c7251;margin-top:5px}.formula{position:absolute;right:16px;top:105px;display:flex;align-items:center;gap:5px;font-family:Georgia,serif;font-size:10px;color:#ad956e}.formula span{text-align:center;font-size:9px}.formula i{display:block;border-top:1px solid #bda989;margin-top:2px;padding-top:2px}.featured{position:absolute;right:16px;top:17px;display:flex;align-items:center;gap:4px;padding:4px 7px;background:#ffffffeb;box-shadow:0 2px 5px #48577a08;border-radius:4px;color:#a18b5a;font-size:9px}.card-body{padding:18px 18px 0}.card-type{font-size:10px;display:flex;align-items:center;gap:5px;color:#708ccc;margin-bottom:9px}.card-type>span{font-size:9px;color:#a6afbd;margin-left:auto}.card-type.wiki{color:#68a58d}.card-type.code{color:#9682bb}.card-type.quiz{color:#c3a16b}.card-title{font-size:15px;font-weight:600;display:block;line-height:1.5;letter-spacing:-.2px}.card-title:hover{color:var(--blue)}.card-body>p{font-size:11px;line-height:1.8;color:#909bae;margin-top:8px;min-height:40px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:13px;margin-bottom:16px}.tags button,.tag{background:#f5f7fa;color:#8a96a9;font-size:9px;border-radius:4px;padding:4px 7px}.tags button:hover{background:#e9efff;color:var(--blue)}.card-footer{border-top:1px solid #f0f2f6;padding:13px 0;display:flex;align-items:center;justify-content:space-between;gap:8px}.author{display:flex;align-items:center;gap:7px;font-size:10px;color:#8792a5}.card-footer>div{display:flex;align-items:center;gap:10px}.like-button,.score{padding:0;display:flex;align-items:center;gap:4px;font-size:10px;color:#98a2b4}.score{color:#9a8d77}.score svg{color:#dfba71}.liked,.like-button.liked{color:#d87589}.load-more{text-align:center;padding:32px 0 10px;font-size:11px;color:#a4aebe}.load-more>span>span{color:#9badcf;margin-left:9px}.load-more .secondary{padding:11px 32px}footer{margin-top:35px;padding:24px 0;border-top:1px solid #e6ebf3;display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#a2adbf}footer>span{display:flex;align-items:center;gap:8px}.footer-star{font-size:15px;color:#b2bfd7}.back{padding:0;display:flex;align-items:center;gap:7px;color:#8a96ab;font-size:12px;margin-bottom:24px}.detail-heading{padding:0 0 28px}.detail-heading h1{font-size:29px;margin-bottom:10px}.detail-heading>p{color:#8b96aa;font-size:14px}.detail-heading .card-type{font-size:12px;justify-content:flex-start}.detail-heading .inline-feature{margin-left:12px;color:#af945d;display:flex;gap:4px;align-items:center}.detail-meta{display:flex;align-items:center;gap:10px;margin-top:20px;font-size:12px;color:#96a0b1;flex-wrap:wrap}.detail-meta b{font-weight:500;color:#6d7a91;margin-right:7px}.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 256px;gap:25px;align-items:start}.content-panel,.side-panel,.form-panel{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}.panel-bar{padding:17px 23px;display:flex;justify-content:space-between;border-bottom:1px solid var(--line);font-size:11px;color:#9aa5b6;gap:10px}.panel-bar>span:first-child{display:flex;align-items:center;gap:8px;color:#687890;font-size:12px}.side-panel{padding:23px;margin-bottom:18px}.side-panel .eyebrow{font-size:8px;letter-spacing:1.4px}.big-rating{font-size:41px;color:#354868;display:flex;align-items:center;gap:12px;margin:16px 0 2px}.big-rating svg{color:#dfba71}.side-panel p{font-size:11px;color:#94a0b4;margin-bottom:18px}.side-panel .full+.full{margin-top:10px}.side-panel h3{font-size:14px;margin-bottom:18px}.side-panel p b{float:right;color:#66768d;font-weight:500}.small-note{font-size:10px!important;margin:12px 0 0!important}.detail-tip{display:flex;gap:10px;padding:0 10px;color:#a3afc0}.detail-tip p{font-size:11px}.toc{display:flex;width:100%;font-size:12px;text-align:left;gap:13px;padding:10px 0;color:#8392a6}.toc:hover{color:var(--blue)}.toc span{font-size:10px;color:#b1bdce}.markdown{padding:30px 35px;font-size:15px;color:#63738a;line-height:1.9;overflow-wrap:anywhere}.markdown h1{font-size:26px;margin:0 0 20px;color:#293b55}.markdown h2{font-size:20px;margin:32px 0 15px;color:#34475e;scroll-margin-top:30px}.markdown h2:first-child{margin-top:0}.markdown h3{margin:20px 0}.markdown p{margin:12px 0}.markdown a{color:var(--blue);text-decoration:underline}.markdown pre{overflow:auto;padding:20px;background:#f4f6fa;border:1px solid #e8edf5;border-radius:8px;font-size:12px;color:#6a7397;line-height:1.9}.markdown code{font-family:ui-monospace,SFMono-Regular,monospace}.markdown blockquote{margin:22px 0;padding:1px 18px;background:#f0f5ff;border-left:3px solid #9db5ea;font-size:13px;color:#6c83a9}.markdown table{width:100%;border-collapse:collapse;font-size:12px}.markdown td,.markdown th{padding:12px;text-align:left;border-bottom:1px solid var(--line)}.markdown th{background:#f7f9fc}.slide-view{padding:32px;background:#fbfcff}.slide-view .art{height:290px;padding:30px}.slide-view .slide-art{height:207px}.slide-view .slide-art h3{font-size:27px}.slide-view .slide-art svg{max-width:200px}.slide-view .slide-art small{font-size:12px}.slide-view .art-label,.slide-view .art-bottom{font-size:9px}.slide-view h2{text-align:center;margin-top:26px;font-size:21px}.slide-view p{text-align:center;margin-top:10px;color:#8f9db3;font-size:12px}.slide-text{min-height:427px;padding:55px 40px;background:#f5f8ff}.slide-text small{color:#90a6ce;font-size:10px;letter-spacing:2px}.slide-text h2{font-size:26px;margin:20px 0}.slide-text p{font-size:15px;color:#8595af}.math-large{text-align:center;font-family:Georgia,serif;font-size:27px;padding:35px 0;color:#6381b9}.slide-text>span{font-size:10px;color:#adb8c9}.slide-controls{display:flex;align-items:center;justify-content:center;gap:25px;padding:12px;border-top:1px solid var(--line);font-size:12px;color:#8e9cb1}.info-note{display:flex;gap:9px;padding:15px 20px;background:#f8faff;color:#91a1ba;font-size:11px;line-height:1.8}.info-note>svg{margin-top:2px}.pdf-frame{width:100%;height:650px;border:0}.quiz-content{padding:30px}.privacy-note{display:flex;align-items:center;gap:8px;background:#f0f7f4;color:#6f9a89;border-radius:7px;padding:13px;font-size:12px;line-height:1.8}.question-label{display:block;margin:30px 0 15px;color:#8195ba;font-size:10px;letter-spacing:1.7px}.question-label span{margin-left:15px;color:#a2adbd;letter-spacing:0}.quiz-content h2{font-size:21px;line-height:1.7}.quiz-content>p{font-size:14px;color:#7a899f;margin-top:17px}.choices{display:grid;gap:10px;margin:25px 0}.choices button{border:1px solid var(--line);border-radius:8px;display:flex;align-items:center;gap:12px;text-align:left;padding:14px;font-size:13px;color:#7e8ba0}.choices button>span{display:grid;place-items:center;border:1px solid #e0e6f0;border-radius:50%;width:24px;height:24px;font-size:11px}.choices button.chosen{border-color:#8faaf0;background:#f3f6ff;color:var(--blue)}.choices button svg{margin-left:auto}.field{display:block;font-size:13px;font-weight:500;color:#61728c;margin:24px 0 0}.field>span,.editor-label b>span{color:#d89b93;margin-left:4px}.field input,.field textarea{display:block;width:100%;margin-top:10px;border:1px solid #e2e8f2;border-radius:7px;background:#fff;padding:12px 14px;color:#55667f;font-size:13px;resize:vertical;line-height:1.7}.quiz-content .primary{margin-top:20px}.success-text{color:#539a80!important;font-size:12px!important}.round-emblem{width:78px;height:78px;border:1px solid #e4eafa;background:linear-gradient(135deg,#edf2ff,#fff);color:#839de0;border-radius:23px;display:grid;place-items:center}.ranking-controls{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);margin-bottom:25px}.ranking-controls>select{border:1px solid #e2e8f0;padding:9px;border-radius:7px;background:#fff}.podium{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-bottom:30px}.podium-card{background:linear-gradient(130deg,#f8f3e8,#fff 95%);border:1px solid #eee4cf;border-radius:12px;padding:23px;transition:transform .2s}.podium-card:hover{transform:translateY(-3px)}.podium-card.place-1{background:linear-gradient(130deg,#edf2fa,#fff 95%);border-color:#e0e7f1}.podium-card.place-2{background:linear-gradient(130deg,#f9eeea,#fff 95%);border-color:#efe3df}.podium-top{display:flex;justify-content:space-between;color:#c9b283;align-items:center;margin-bottom:25px}.podium-top>span{font-size:30px;font-style:italic;font-family:Georgia,serif}.place-1 .podium-top{color:#9dacbf}.place-2 .podium-top{color:#c5a596}.podium-card h2{font-size:17px;line-height:1.7;min-height:58px}.podium-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:20px}.podium-bottom strong{font-size:26px;color:#a68b54}.podium-bottom small{font-size:10px;font-weight:400;margin-left:4px}.ranking-table{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}.ranking-row{display:grid;grid-template-columns:60px 1fr 100px 90px 50px;align-items:center;gap:15px;padding:21px 26px;border-bottom:1px solid #edf1f7;font-size:12px;color:#8b99ad}.ranking-row:last-child{border:0}.ranking-row:not(.table-head):hover{background:#f9fbff}.ranking-row b{font-size:13px;color:#4b5f7b;font-weight:500}.ranking-row small{display:block;font-size:10px;margin-top:7px;color:#a2afc2}.ranking-row.table-head{background:#fcfdff;padding-top:16px;padding-bottom:16px;font-size:11px}.rank-num{font-size:16px;color:#a7b3c4;font-style:italic}.rank-num.top{color:#bba26b}.rank-score{color:#657fae}.ranking-note{font-size:11px;color:#9aa7bb;display:flex;align-items:center;gap:7px;margin-top:19px}.my-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:30px 0}.my-stats>div{padding:25px;background:#fff;border:1px solid var(--line);border-radius:12px}.my-stats>div>span{font-size:12px;color:#8c9ab0}.my-stats strong{display:flex;gap:12px;align-items:baseline;margin-top:18px;font-size:33px;font-weight:500;color:#546d94}.my-stats small{font-size:11px;color:#a3afc0;font-weight:400}.my-stats svg{margin-left:auto;color:#cfb0bc}.progress{height:3px;background:#eef2f9;border-radius:3px;margin-top:18px}.progress i{height:100%;background:#819de6;display:block;border-radius:3px}.mine-tabs{border-bottom:1px solid var(--line);margin-bottom:22px}.my-list{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0 23px}.my-item{display:flex;align-items:center;gap:18px;padding:24px 0;border-bottom:1px solid var(--line)}.my-item:last-child{border:0}.my-thumb{width:65px;height:65px;display:grid;place-items:center;background:#edf1fb;color:#8ba1ce;border-radius:10px;cursor:pointer}.my-item h3{font-size:14px}.my-item p{font-size:10px;color:#a0aec1;margin-top:10px}.published{display:inline-flex;align-items:center;gap:3px;color:#84ac9e;margin-left:17px}.my-actions{margin-left:auto;display:flex;gap:12px;align-items:center}.my-actions .secondary{font-size:11px;padding:9px 12px}.text-button{font-size:12px;color:var(--blue)}.submit-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:27px;align-items:start}.form-panel{padding:30px}.steps{display:flex;align-items:center;justify-content:center;gap:18px;margin-bottom:35px;border-bottom:1px solid var(--line);padding-bottom:25px}.steps>div{height:1px;width:60px;background:#e0e7f3}.steps span{display:flex;gap:8px;align-items:center;font-size:12px;color:#a4afc0}.steps i{display:grid;place-items:center;border-radius:50%;width:23px;height:23px;background:#f0f3f9;font-style:normal}.steps span.active{color:var(--blue)}.steps .active i{background:#e9efff}.form-panel>h3{font-size:13px;color:#60728d}.type-picker{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:15px}.type-picker button{border:1px solid #e5eaf3;border-radius:8px;padding:19px 5px;display:flex;align-items:center;flex-direction:column;gap:12px;color:#98a5ba;font-size:11px;position:relative}.type-picker button.picked{border-color:#98b0f1;background:#f4f7ff;color:var(--blue)}.pick-check{position:absolute;top:8px;right:8px}.dropzone{width:100%;border:1px dashed #b8c7e4;border-radius:8px;display:flex;align-items:center;flex-direction:column;background:#fafcff;padding:29px 10px;gap:12px;margin-top:12px}.dropzone:hover{background:#f1f5ff}.dropzone>span{color:#8da6d7}.dropzone b{font-size:12px;font-weight:500;color:#7289ad}.dropzone small{font-size:10px;color:#a3afc1}.file-item{display:flex;align-items:center;gap:12px;padding:13px;background:#f6f9ff;border:1px solid #e8eef8;border-radius:7px;margin-top:10px;color:#7b90b5;font-size:12px}.file-item>span{flex:1;overflow-wrap:anywhere}.file-item small{display:block;margin-top:4px;color:#aab6c9;font-size:10px}.form-actions{display:flex;justify-content:space-between;gap:12px;margin-top:30px;padding-top:25px;border-top:1px solid var(--line)}.submit-aside .side-panel{padding:24px}.hint-icon{display:grid;place-items:center;background:#eef4ff;color:#8da6d7;width:45px;height:45px;border-radius:11px;margin-bottom:20px}.side-panel ul{padding-left:18px;color:#98a5b8;font-size:12px;line-height:2.4;margin:15px 0}.side-panel hr{border:0;border-top:1px solid var(--line);margin:20px 0}.submit-aside .info-note{background:transparent;padding:4px 10px}.private-fields{background:#f6f9f8;border:1px solid #e4eee9;border-radius:9px;padding:20px;margin-top:24px}.private-fields h3{display:flex;align-items:center;gap:8px;color:#6c9384;font-size:13px}.private-fields>p{font-size:11px;color:#8ea89c;margin-top:10px}.private-fields .field{margin-top:16px}.helper{font-size:11px;color:#a0abc0;margin-top:8px}.editor-label{display:flex;align-items:center;justify-content:space-between;margin:25px 0 10px}.editor-label b{font-weight:500;font-size:13px;color:#687a94}.editor-label>div{background:#f4f6fa;border-radius:5px;padding:3px}.editor-label button{font-size:11px;padding:5px 10px;color:#91a0b6;border-radius:4px}.editor-label button.on{background:#fff;color:var(--blue);box-shadow:0 1px 4px #00000008}.md-editor{width:100%;border:1px solid #e4eaf3;border-radius:7px;padding:17px;font-family:ui-monospace,SFMono-Regular,monospace;line-height:1.8;font-size:12px;color:#71819a;resize:vertical}.editor-preview{border:1px solid var(--line);border-radius:8px;max-height:450px;overflow:auto;padding:24px}.form-error{background:#fff1f1;color:#c57373;padding:12px;border-radius:7px;font-size:12px;margin-top:20px}.confirm-banner{display:flex;gap:12px;align-items:center;background:#f1f8f4;border-radius:8px;padding:18px;margin-bottom:28px;color:#7fa995}.confirm-banner h3{font-size:13px}.confirm-banner p{font-size:11px;margin-top:5px}.form-panel>h2{margin:15px 0}.form-panel>p{font-size:13px;color:#8a99af}.confirm-content{padding:24px;background:#f8faff;border-radius:8px;margin-top:25px;color:#8596b1}.confirm-content p{margin:12px 0;font-size:13px}.preserve{white-space:pre-wrap}.icon-button{display:inline-flex;align-items:center;justify-content:center;padding:6px;border-radius:5px;color:#95a3b8}.icon-button:hover{background:#eef2f9}.empty{padding:65px 20px;text-align:center;color:#96a5bd}.empty>svg{margin-bottom:20px}.empty h3{color:#7688a4;font-size:16px;margin-bottom:10px}.empty p{font-size:13px}.empty .secondary,.empty .primary{margin-top:20px}.toast-message{position:fixed;left:calc(50% + 112px);bottom:35px;transform:translate(-50%);border:1px solid #dfe9e4;box-shadow:0 8px 30px #304c651a;background:#fff;padding:15px 23px;border-radius:10px;display:flex;align-items:center;gap:10px;color:#688f7d;font-size:13px;z-index:100;max-width:90vw}.toast-enter-active,.toast-leave-active{transition:opacity .2s}.toast-enter-from,.toast-leave-to{opacity:0}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:70;display:flex;align-items:center;justify-content:center;background:#25355355;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);padding:20px}.modal{position:relative;width:460px;background:#fff;border-radius:18px;padding:38px;text-align:center;box-shadow:0 25px 80px #1c30402b}.modal-close{position:absolute;top:14px;right:14px}.modal-icon{display:grid;place-items:center;width:60px;height:60px;border-radius:18px;background:#fff8e9;color:#d2b169;margin:0 auto 22px}.modal h2{font-size:20px;margin-bottom:12px}.modal>p{font-size:12px;color:#93a0b6}.rating-stars{display:flex;justify-content:center;gap:8px;margin-top:25px}.rating-stars button{color:#e0e6f0;padding:4px}.rating-stars .filled{color:#e4bd69}.rating-caption{display:block;font-size:12px;color:#b2a17e;margin:13px 0 28px}.modal>small{display:block;font-size:10px;color:#aeb8c8;line-height:1.7;margin-top:17px}.danger{background:#ce7c83}.mobile-toggle,.veil{display:none}@media(min-width:1500px){main{padding-top:45px}.work-grid{gap:25px}.art{height:210px}.slide-art,.tree-art,.code-art,.quiz-art{height:152px}.slide-art h3{font-size:20px}.card-title{font-size:16px}.card-body>p{font-size:12px}.card-type,.author,.like-button,.score{font-size:11px}}@media(max-width:1190px){.sidebar{width:200px;padding-left:15px;padding-right:15px}.main-shell{margin-left:200px}main{padding:30px 28px 0}.topbar{padding:0 28px}.work-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.intro-count{padding-right:60px}.detail-layout,.submit-layout{grid-template-columns:minmax(0,1fr) 225px;gap:18px}.tabs{gap:19px}.podium-card{padding:18px}.podium-card h2{font-size:15px}.ranking-row{grid-template-columns:40px 1fr 65px 65px 40px;padding:20px}.form-panel{padding:24px}.sidebar .semester-card>div{font-size:11px}.toast-message{left:calc(50% + 100px)}}@media(max-width:950px){.sidebar{width:180px;padding:28px 12px 0}.brand{font-size:22px;gap:10px;padding-left:6px}.brand-icon{width:37px;height:39px}.brand-en{font-size:7px}.main-shell{margin-left:180px}main{padding:27px 22px 0}.topbar{padding:0 22px}.intro-decoration,.intro-count{display:none}.intro-band{padding:18px}.intro-band p{font-size:11px}.category-tabs{gap:18px;overflow:auto}.category-tabs button{font-size:11px}.category-tabs button>svg{display:none}.category-tabs button>span{font-size:9px}.detail-layout,.submit-layout{grid-template-columns:1fr}.detail-aside{display:grid;grid-template-columns:1fr 1fr;gap:15px}.detail-aside .detail-tip,.submit-aside{display:none}.sidebar .semester-card{padding:13px 10px}.sidebar .semester-card>div{font-size:10px}.sidebar .tiny-spark{font-size:16px}.page-heading h1{font-size:28px}.filter-row{gap:10px}.filters{gap:8px}.search{width:240px}.sort{padding-left:9px}.filter-toggle{font-size:11px}.podium{gap:10px}.podium-card h2{font-size:13px}.podium-bottom{align-items:flex-start;gap:5px;flex-direction:column}.ranking-row{grid-template-columns:30px 1fr 55px 50px;gap:10px}.rank-author,.table-head>span:nth-child(3){display:none}.my-stats{gap:10px}.my-stats>div{padding:20px 15px}.my-stats strong{font-size:27px;flex-wrap:wrap;gap:6px}.my-item{gap:12px}.my-thumb{width:48px;height:48px}.my-item h3{font-size:12px}.my-actions{gap:5px}.toast-message{left:calc(50% + 90px)}}@media(max-width:700px){.sidebar{transform:translate(-100%);transition:transform .2s;width:224px}.sidebar.open{transform:translate(0)}.sidebar .semester-card{padding:18px}.sidebar .semester-card>div{font-size:12px}.main-shell{margin-left:0}.topbar{height:62px;padding:0 18px}.mobile-toggle{display:inline-flex}.breadcrumb{gap:8px}.top-right{gap:12px}.top-divider{display:none}.demo-pill{font-size:10px}.top-right>.avatar{display:none}.veil{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#293b5355;z-index:24}.page-heading{align-items:flex-start;margin-bottom:22px}.page-heading h1{font-size:25px;letter-spacing:-.7px}.page-heading p{font-size:12px;max-width:240px}.page-heading>.primary{padding:10px 12px;font-size:11px;margin-top:26px}.eyebrow{font-size:9px;letter-spacing:1.8px}.intro-band{gap:13px;padding:17px 15px;min-height:95px}.intro-symbol{width:42px;height:42px;border-radius:11px}.intro-symbol svg{width:24px}.intro-band b{font-size:13px}.intro-band p{font-size:10px;line-height:1.8;max-width:260px}.discovery-toolbar{margin-top:18px}.category-tabs{gap:22px}.tabs button,.category-tabs button{font-size:12px}.category-tabs button>svg{display:block;width:14px}.category-tabs button>span{display:none}.filter-row{margin:19px 0;align-items:stretch;flex-direction:column;gap:13px}.search{width:100%;padding:12px}.search input{font-size:12px}.filters{justify-content:flex-end}.section-line .muted{display:none}.section-line{margin-top:22px}.work-grid{gap:16px}.card-body{padding:15px 13px 0}.card-title{font-size:13px}.card-body>p{font-size:10px}.art{height:165px;padding:13px 11px 9px}.slide-art,.tree-art,.code-art,.quiz-art{height:113px}.slide-art h3{font-size:12px;margin:7px 0}.slide-art small{font-size:7px}.slide-art p{font-size:5px}.slide-art svg{width:38%;margin-right:-7px}.art-label,.art-label span,.art-bottom,.art-bottom span{font-size:5px}.featured{font-size:8px;right:12px;top:13px;padding:3px 5px}.featured svg{width:9px}.tree-art{padding-top:19px}.tree-node{font-size:6px}.tree-node.root{width:82px}.branches{gap:15px;margin-top:15px}.branches:before{width:96px}.branches .tree-node{font-size:6px;padding:5px}.code-art p{font-size:7px}.code-art em{font-size:6px;margin-right:5px}.quiz-art h3{font-size:12px}.quiz-art small{font-size:6px}.formula{font-size:7px;top:99px;right:10px}.formula span{font-size:6px}.card-footer{gap:3px}.card-footer>div{gap:6px}.author{font-size:9px;gap:4px}.avatar{width:21px;height:21px;font-size:9px}.like-button,.score{font-size:9px;gap:3px}.like-button svg,.score svg{width:12px}.card-type{font-size:9px}.card-type>span{display:none}.card-type svg{width:12px}.tags{gap:4px;margin-bottom:12px}.tags button{font-size:8px;padding:3px 5px}.load-more{font-size:10px}main{padding:25px 17px 0}footer{font-size:9px;gap:10px;flex-wrap:wrap;margin-top:25px}.detail-heading h1{font-size:24px}.detail-heading>p{font-size:13px}.detail-meta{font-size:10px;gap:8px}.detail-aside{grid-template-columns:1fr}.side-panel{margin-bottom:0}.detail-aside .side-panel:nth-child(2){display:none}.markdown{padding:23px 20px;font-size:14px}.markdown h2{font-size:18px}.markdown pre{padding:15px;font-size:11px}.panel-bar{padding:15px;font-size:10px}.slide-view{padding:17px}.slide-view .art{height:250px;padding:20px}.slide-view .slide-art{height:185px}.slide-view .slide-art h3{font-size:18px}.slide-view .slide-art svg{width:43%}.slide-text{padding:35px 25px;min-height:380px}.slide-text h2{font-size:22px}.math-large{font-size:23px}.quiz-content{padding:20px}.quiz-content h2{font-size:19px}.privacy-note{font-size:11px;align-items:flex-start}.round-emblem{width:55px;height:55px;border-radius:17px}.round-emblem svg{width:26px}.ranking-controls .tabs{gap:14px}.ranking-controls .tabs button{font-size:11px;gap:5px}.ranking-controls .tabs svg{width:14px}.ranking-controls>select{font-size:10px;padding:6px;width:81px}.podium{grid-template-columns:1fr}.podium-card{display:grid;grid-template-columns:38px 1fr;gap:8px 15px;padding:18px}.podium-top{grid-row:1/4;flex-direction:column;margin:0;justify-content:center;gap:12px}.podium-top>span{font-size:28px}.podium-top svg{width:20px}.podium-card h2{font-size:16px;min-height:0}.podium-card .card-type{margin:0}.podium-bottom{flex-direction:row;margin-top:5px;align-items:center}.podium-bottom strong{font-size:21px}.ranking-row{padding:16px 13px;gap:8px;grid-template-columns:24px 1fr 50px 29px}.ranking-row b{font-size:11px}.ranking-row small{font-size:9px}.rank-num{font-size:13px}.ranking-note{font-size:10px;align-items:flex-start;line-height:1.8}.my-stats{gap:8px}.my-stats>div{padding:16px 11px}.my-stats>div>span{font-size:10px}.my-stats strong{font-size:25px;display:block;margin-top:10px}.my-stats strong small{display:block;font-size:9px;margin-top:5px}.my-stats strong svg{display:none}.my-list{padding:0 15px}.my-item{flex-wrap:wrap}.my-item>div:nth-child(2){flex:1;min-width:180px}.my-actions{width:100%;padding-left:60px;margin-top:5px}.my-item h3{font-size:13px}.my-item p{font-size:9px}.published{margin-left:7px}.form-panel{padding:20px 17px}.type-picker{gap:6px}.type-picker button{font-size:10px;padding:17px 3px}.type-picker button>svg{width:21px}.type-picker .pick-check{width:12px;right:4px;top:4px}.field,.field input,.field textarea{font-size:12px}.steps{gap:12px}.steps>div{width:35px}.form-actions .primary,.form-actions .secondary{padding:11px 12px;font-size:12px}.private-fields{padding:15px}.modal{padding:30px 23px}.modal h2{font-size:18px}.rating-stars{gap:5px}.toast-message{left:50%;font-size:12px;width:max-content;max-width:90vw;padding:14px 17px;bottom:20px}}@media(max-width:390px){.work-grid{grid-template-columns:1fr}.art{height:190px}.slide-art,.tree-art,.code-art,.quiz-art{height:138px}.slide-art h3{font-size:20px}.slide-art svg{width:40%}.card-title{font-size:16px}.card-body>p{font-size:12px}.card-type,.author,.score,.like-button{font-size:11px}.art-label{font-size:8px}.code-art p{font-size:10px}.quiz-art h3{font-size:18px}.formula{font-size:11px}.formula span{font-size:10px}.page-heading>.primary{padding:10px 9px}.page-heading h1{font-size:23px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.brand-en{font-size:10px}.eyebrow{font-size:11px}.demo-pill,.breadcrumb{font-size:12px}.page-heading p{font-size:14px}.intro-band p{font-size:13px}.tabs button{font-size:14px}.search input,.filter-toggle,select{font-size:13px}.section-line h2{font-size:16px}.section-line h2 span,.muted{font-size:12px}.card-title{font-size:16px}.card-body>p{font-size:13px;min-height:47px}.card-type{font-size:12px}.card-type>span{font-size:10px}.tags button,.tag{font-size:11px}.author,.like-button,.score{font-size:12px}.featured{font-size:10px}.card-footer{padding:15px 0}.semester-card p,.semester-card button,.user small{font-size:12px}.user b{font-size:13px}footer{font-size:12px}.side-panel p,.toc,.info-note,.privacy-note,.helper{font-size:13px}.field,.field input,.field textarea,.ranking-row b{font-size:14px}.ranking-row small{font-size:12px}.my-item h3{font-size:15px}.my-item p,.ranking-note{font-size:12px}.modal>p,.rating-caption{font-size:14px}.modal>small{font-size:12px}.primary,.secondary{font-size:14px}.markdown{font-size:16px}@media(max-width:700px){.card-title{font-size:14px}.card-body>p{font-size:12px;min-height:44px}.card-type{font-size:11px}.author,.like-button,.score,.tags button{font-size:10px}.page-heading p{font-size:13px}.page-heading>.primary{font-size:12px}.intro-band p{font-size:11px}.tabs button{font-size:12px}.muted{display:none}footer{font-size:10px}.ranking-row b{font-size:12px}.ranking-row small{font-size:10px}.my-item p{font-size:11px}.breadcrumb,.demo-pill{font-size:10px}}.auth-modal{max-height:92vh;overflow-y:auto;padding:28px 34px}.auth-logo{display:grid;place-items:center;background:#edf2ff;color:var(--blue);border-radius:15px;width:53px;height:53px;margin:0 auto 16px}.auth-tabs{display:flex;border-bottom:1px solid var(--line);margin-top:22px}.auth-tabs button{width:50%;padding:12px;color:#95a2b7;font-size:14px}.auth-tabs .active{color:var(--blue);border-bottom:2px solid var(--blue)}.auth-modal .field{text-align:left;margin-top:17px}.auth-modal .field input{padding:10px 12px}.auth-name-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.password-input{position:relative}.password-input input{padding-right:54px!important}.password-input>button{position:absolute;right:7px;top:11px;color:#8ca0c0;font-size:12px}.auth-submit{margin-top:24px}.auth-help{margin-top:18px!important;font-size:12px!important}.markdown-tools{display:flex;gap:10px;margin-top:23px}.markdown-tools .secondary{font-size:12px;padding:9px 12px}.attachment-link{display:flex;align-items:center;gap:8px;color:var(--blue);font-size:12px;overflow-wrap:anywhere;padding:12px 0;border-bottom:1px solid var(--line);margin-bottom:15px}.private-modal{text-align:left;max-height:85vh;overflow:auto;width:640px}.private-modal h3{margin-top:25px}.private-modal p{color:#70819a!important}.admin-banner{display:flex;align-items:center;justify-content:space-between;gap:20px;background:#edf3ff;border:1px solid #dfe8fb;padding:24px;border-radius:12px;margin:24px 0}.admin-banner h3{font-size:15px}.admin-banner p{font-size:12px;color:#8b9db9;margin-top:7px}.admin-secret{display:flex;align-items:center;gap:20px;padding:19px;background:#fff8e9;color:#927951;border:1px solid #eedeac;border-radius:9px;overflow-wrap:anywhere;margin:15px 0}.success-banner{padding:13px 17px;background:#eef8f1;color:#6b9b7f;border-radius:8px;font-size:13px}.admin-heading{font-size:17px;margin:30px 0 17px}.admin-heading>span{font-size:12px;color:#99a8be;margin-left:8px;font-weight:400}.admin-scroll{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:12px}.admin-table{width:100%;border-collapse:collapse;text-align:left;white-space:nowrap}.admin-table th{color:#9ba7b9;background:#fafcff;font-size:12px;font-weight:400;padding:15px 22px}.admin-table td{padding:17px 22px;border-top:1px solid var(--line);font-size:13px;color:#788ba5}.admin-table small{display:block;color:#a4b1c5;font-size:11px;margin-top:6px}.admin-work{display:flex;align-items:center;gap:15px;background:#fff;border:1px solid var(--line);border-radius:9px;padding:19px;margin-bottom:13px}.admin-work>div{flex:1}.admin-work h3{font-size:14px}.admin-work p{font-size:11px;color:#98a8be;margin-top:6px}.admin-feature{font-size:12px;color:#8a9bb4;display:flex;gap:5px;align-items:center}.admin-score{font-size:11px;color:#8a9bb4}.admin-score input{display:block;width:82px;margin-top:5px;border:1px solid #dfe7f3;border-radius:5px;padding:7px;font-size:12px;color:#687e9f}.markdown img{max-width:100%;height:auto;border-radius:8px}.sidebar nav{gap:4px}.private-modal .preserve{overflow-wrap:anywhere;font-size:14px!important}@media(max-width:700px){.auth-modal{padding:25px 22px}.admin-banner{flex-direction:column;align-items:flex-start;padding:20px}.admin-work{flex-wrap:wrap}.admin-work>div{flex-basis:100%}.admin-secret{flex-direction:column;align-items:flex-start}.admin-table th,.admin-table td{padding:13px 16px}.markdown-tools .secondary{font-size:11px}.auth-name-row{gap:9px}}.chapter-filter{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;background:#fff;padding:16px;border:1px solid var(--line);border-radius:12px;margin:8px 0 23px}.chapter-filter button{display:flex;align-items:center;gap:8px;padding:12px 10px;border-radius:7px;text-align:left;color:#8290a7;font-size:12px;white-space:nowrap;border:1px solid transparent}.chapter-filter button:hover{background:#f6f8fc}.chapter-filter button.selected{color:var(--blue);background:#edf2ff;border-color:#e0e8ff;font-weight:600}.chapter-filter i{font-size:10px;color:#a4b0c4;font-style:normal}.chapter-filter .selected i{color:#819bdc}.chapter-filter small{margin-left:auto;color:#a4b0c4;font-size:10px;font-weight:400}.material-select select{padding:8px;background:#fff;border:1px solid var(--line);border-radius:6px;font-size:12px}.chapter-field{margin:0 0 27px}.chapter-field select{display:block;margin-top:10px;width:100%;border:1px solid #e2e8f2;border-radius:7px;background:#fff;padding:13px;color:#65768f;font-size:14px}.chapter-card-label{font-size:10px!important;margin-left:auto!important;color:#9aa7bb!important}.filter-row .filters{gap:12px}.filter-row .search{max-width:320px}@media(max-width:1150px){.chapter-filter{grid-template-columns:repeat(3,minmax(0,1fr))}.filter-row{flex-wrap:wrap}.filter-row .filters{margin-left:auto}.chapter-filter button:first-child{grid-column:span 3}}@media(max-width:700px){.chapter-filter{grid-template-columns:repeat(2,minmax(0,1fr));padding:12px;gap:5px;margin-top:0}.chapter-filter button{font-size:12px;padding:10px 8px;gap:7px}.chapter-filter button:first-child{grid-column:auto}.chapter-filter small{font-size:10px}.filter-row .search{max-width:none}.filter-row .filters{width:100%;justify-content:space-between;gap:6px}.material-select select{font-size:11px}.card-type>.chapter-card-label{display:block;font-size:9px!important}.form-panel .chapter-field{margin-top:0}}.katex-display{overflow-x:auto;overflow-y:hidden;padding:8px 0}.katex{font-size:1.1em}.sidebar-upload{width:100%;margin-bottom:22px;padding:12px 14px;font-size:14px}.quiz-editor{margin-top:28px}.quiz-summary{display:flex;align-items:center;justify-content:space-between;color:#647895}.quiz-summary>span{font-size:13px;color:#93a1b7}.question-editor{border:1px solid #e2e8f2;border-radius:9px;padding:20px;margin:20px 0;background:#fff}.question-editor-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.question-editor-head>b{font-size:14px;color:#536b91}.question-editor-head select{background:#f3f6fb;border:1px solid #e4eaf3;border-radius:6px;padding:8px}.question-editor-head>label{font-size:12px;color:#8396b1;display:flex;align-items:center;gap:7px}.question-editor-head input{width:65px;padding:7px;border:1px solid #e4eaf3;border-radius:5px;font-size:12px}.question-editor-head>div{margin-left:auto;display:flex}.question-options-editor{margin-top:16px}.question-options-editor>div{display:flex;align-items:center;gap:10px;margin-bottom:10px;color:#889bb8;font-size:13px}.question-options-editor input{flex:1;width:0;border:1px solid #e2e8f2;border-radius:6px;padding:10px;font-size:13px;color:#687b98}.question-options-editor .text-button{margin-top:5px}.question-secrets{border-top:1px dashed #dce8e1;margin-top:22px;padding-top:2px}.question-secrets .field{color:#719180;font-size:13px}.correct-options{display:flex;flex-wrap:wrap;gap:15px;margin-top:12px}.correct-options label{display:flex;align-items:center;gap:7px;color:#71849d;font-size:14px}.plain-textarea{width:100%;border:1px solid #e2e8f2;border-radius:7px;margin-top:10px;padding:12px;font:inherit;font-size:13px;resize:vertical;color:#61758f;line-height:1.7}.quiz-runner-inner{padding:24px}.quiz-type-filters{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}.quiz-type-filters button{padding:8px 11px;border-radius:6px;background:#f5f7fb;color:#8b9cb3;font-size:12px}.quiz-type-filters button.on{background:#eaf0ff;color:#4169de}.question-runner{border:1px solid #e3eaf4;border-radius:9px;padding:22px;margin-bottom:20px}.question-meta{display:flex;align-items:center;gap:13px;font-size:12px;color:#94a3ba}.question-meta b{font-size:14px;color:#5a7295}.question-meta svg{margin-left:auto;color:#72a98d}.markdown.question-prompt{padding:14px 0 10px;font-size:15px}.question-prompt p{margin:0 0 10px}.answer-choices{display:grid;gap:10px}.answer-choices label{display:flex;align-items:flex-start;gap:9px;padding:13px;border:1px solid #e3eaf4;border-radius:7px;cursor:pointer;font-size:13px;color:#7589a5;line-height:1.7}.answer-choices label.chosen{background:#eef3ff;border-color:#b2c4f2;color:#4169de}.answer-choices input{margin-top:5px;accent-color:#4169de}.answer-choices span{white-space:pre-wrap;overflow-wrap:anywhere}.answer-upload{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:13px}.answer-upload>span{font-size:11px;color:#9cabc1}.answer-upload .secondary{font-size:12px;padding:9px 12px;cursor:pointer}.solution-panel{background:#f2f8f5;border:1px solid #dcece3;border-radius:8px;margin-top:24px;padding:18px}.solution-panel h4{font-size:13px;color:#648d79;margin:0 0 8px}.solution-panel h4:not(:first-child){margin-top:18px}.solution-panel .markdown{padding:0;font-size:14px;color:#6d8c7c}.solution-panel .markdown p{margin:0;white-space:pre-wrap}.quiz-submit-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding-top:22px;margin-top:18px}.quiz-submit-bar>span{font-size:13px;color:#8a9fbb}.question-runner textarea.code{font-family:ui-monospace,monospace;font-size:13px}.question-runner .file-item a{flex:1}.page-heading{min-height:54px}.question-editor .field{margin-top:17px}@media(max-width:700px){.question-editor{padding:15px}.question-editor-head{gap:8px}.question-editor-head>div{width:100%;justify-content:flex-end}.quiz-runner-inner{padding:15px}.question-runner{padding:16px}.quiz-type-filters{gap:6px}.quiz-type-filters button{font-size:11px}.question-meta{gap:9px}.quiz-submit-bar .primary{font-size:12px;padding:11px}.page-heading>.primary{margin-top:4px}.question-editor-head input{width:55px}}.art-photo{width:100%;height:100%;object-fit:cover;object-position:top;display:block;border-radius:7px;background:#fff}.art-photo-tall{max-height:420px;object-fit:contain;background:#f6f8fd}.art-head{display:flex;align-items:baseline;gap:8px;margin-bottom:4px}.art-num{font-size:24px;font-weight:700;letter-spacing:-1px;opacity:.32}.art-chapter{font-size:11px;font-weight:600}.art-kind{font-size:9px;margin-left:auto;letter-spacing:.12em;opacity:.55;white-space:nowrap}.art-motif{width:100%;height:86px;display:block;margin:0 0 6px}.art-title{font-size:12.5px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;opacity:.92}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2) format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff) format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2) format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff) format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2) format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff) format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2) format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff) format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2) format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff) format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2) format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff) format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2) format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff) format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2) format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff) format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2) format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff) format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2) format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff) format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2) format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff) format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff) format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff) format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff) format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2) format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff) format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2) format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff) format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2) format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff) format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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) format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff) format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2) format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff) format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2) format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff) format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf) format("truetype")}.katex{font: 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;position:relative;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.47"}.katex .katex-mathml{border:0;-webkit-clip-path:inset(50%);clip-path:inset(50%);height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.newline{display:block}.katex .base{position:relative;white-space:nowrap;width:-webkit-min-content;width:-moz-min-content;width:min-content}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{display:inline-flex;flex-direction:row}.katex .thinbox{max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .smash{display:inline;line-height:0}.katex .clap,.katex .llap,.katex .rlap{position:relative;width:0}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.root{margin-left:.2777777778em;margin-right:-.5555555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.6666666667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.8571428571em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.5542857143em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.8888888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.7644444444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{display:inline-block;width:.12em}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{display:inline-block;min-width:1px}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{border:.04em solid;box-sizing:border-box}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}
