html{line-height:1.5;-webkit-text-size-adjust:100%}button,input{font:inherit}h1,h2,h3,p{overflow-wrap:break-word}body{font-family:Arial,"Microsoft YaHei",sans-serif}button{color:inherit}button:disabled{cursor:not-allowed}

:root{font-family:Inter,"Microsoft YaHei",Arial,sans-serif;color:#24263c;background:#f6f7fb}*{box-sizing:border-box}body{margin:0}button{font:inherit;cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible{outline:3px solid #9c8fff;outline-offset:4px}.shell{display:flex;min-height:100vh}.sidebar{width:230px;background:white;border-right:1px solid #e9eaf2;padding:36px 24px;position:fixed;height:100vh;display:flex;flex-direction:column}.brand{display:flex;gap:12px;align-items:center;font-size:24px;font-weight:750}.logo{background:#6554ce;color:white;width:44px;height:44px;display:grid;place-items:center;border-radius:14px}.brand small{display:block;font-size:9px;letter-spacing:1.7px;color:#9897ad;margin-top:3px}.nav-label{font-size:11px;color:#9696a8;margin:54px 0 16px 12px}nav{display:flex;flex-direction:column;gap:8px}nav button{display:flex;gap:12px;align-items:center;text-align:left;border:0;padding:14px 15px;background:transparent;color:#73758b;border-radius:10px;font-size:14px}nav button span{font-size:21px}nav button.selected{background:#eeebfc;color:#6653c7;font-weight:700}nav em{margin-left:auto;font-size:11px;background:#ded8fa;padding:3px 6px;border-radius:5px;font-style:normal}.side-bottom{margin-top:auto;padding:20px 10px;font-size:12px;color:#646579}.side-bottom p{font-size:11px;color:#9a99aa;line-height:1.8;margin:10px 0 22px}main{margin-left:230px;width:calc(100% - 230px);padding:34px 5%;max-width:1650px}header{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:36px}.eyebrow{font-size:11px;letter-spacing:1px;color:#8b8b9e}h1{font-size:23px;margin:10px 0;font-weight:650}.account{display:flex;gap:12px;font-size:11px;color:#858399;max-width:290px;flex-wrap:wrap}.account a{color:#6854cc}.hero{background:#eeebfa;border:1px solid #e6e1f7;border-radius:18px;padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:24px}.hero h2,.welcome h2{font-size:33px;line-height:1.5;letter-spacing:-1px;margin:18px 0 12px}.hero p,.welcome p{color:#77728e;font-size:13px;line-height:1.9;margin-bottom:26px}.pill{font-size:11px;color:#7561b6;background:#e5dff8;border-radius:5px;padding:6px 10px;display:inline-block}.primary{border:0;border-radius:9px;background:#6754cd;color:white;padding:13px 22px;display:inline-flex;align-items:center;justify-content:center;gap:26px;font-size:13px;font-weight:600}.primary:hover:not(:disabled){background:#5743ba}.secondary{border:1px solid #e1dfea;background:white;border-radius:8px;padding:11px 16px;color:#77718a;font-size:12px}.progress-ring{width:190px;height:190px;flex-shrink:0;border-radius:50%;background:conic-gradient(#8573dd var(--progress),#ddd6f1 0);padding:10px;margin-right:24px}.progress-ring>div{background:#eeebfa;border-radius:50%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px}.progress-ring span{font-size:11px;color:#8c82a7}.progress-ring b{font-size:48px;font-weight:600;color:#5b479e}.progress-ring small{font-size:20px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:24px 0 34px}.stats article{background:white;border:1px solid #ececf3;border-radius:12px;padding:21px}.stats span{font-size:12px;color:#838195}.stats b{display:block;font-size:31px;font-weight:600;margin:12px 0 7px}.stats small{font-size:12px;font-weight:400;margin-left:6px;color:#9d99ad}.stats p{font-size:10px;color:#aaa6b7;margin:0}.section-head{display:flex;justify-content:space-between;align-items:center;gap:14px;margin:24px 0 17px}.section-head h2{font-size:17px;margin:0}.section-head>span{font-size:11px;color:#a19cae}.modes{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.modes article{background:white;border:1px solid #e9e8f1;border-radius:12px;padding:24px}.modes i{font-size:10px;font-style:normal;color:#a099b7;letter-spacing:1px}.modes h3{font-size:17px;margin:17px 0 10px}.modes p{font-size:12px;line-height:1.9;color:#9590a3;min-height:66px}.modes button{border:0;background:none;color:#6d59b7;font-size:12px;padding:10px 0 0}.plan{background:white;border:1px solid #eceaf3;padding:23px;border-radius:12px;margin:25px 0}.plan h3{margin:0 0 12px;font-size:14px}.plan>div{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.plan p{font-size:11px;color:#928b9f;line-height:1.8}.plan b{display:block;color:#676176;font-size:12px;margin-bottom:6px}.plan small{font-size:10px;color:#a7a0b2}footer{text-align:center;font-size:10px;color:#aaa5b7;padding:30px 0 10px}.quiz-layout{display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:22px}.question-card,.answer-sheet,.review-card,.history,.result{background:white;border:1px solid #e7e5ef;border-radius:15px;padding:28px}.question-meta{display:flex;align-items:center;gap:12px;color:#9d95ab;font-size:11px}.question-meta b{margin-left:auto;color:#797085}.bar{height:4px;background:#f0edf7;margin:20px 0 36px;border-radius:4px}.bar>div{height:100%;background:#9680de;border-radius:4px}.question-card h2{font-size:21px;line-height:1.8;margin:0 0 30px}.options{display:grid;gap:13px}.options button{border:1px solid #e7e3ee;background:white;display:flex;align-items:center;text-align:left;gap:16px;padding:17px;border-radius:9px;font-size:14px;line-height:1.7}.options button>span{display:grid;place-items:center;width:30px;height:30px;flex-shrink:0;border:1px solid #e6e1ee;border-radius:7px;color:#93899f}.options button.chosen{background:#f2edff;border-color:#9981dc;color:#6a4bad}.options button.chosen>span{background:#8061c9;color:white}.options i{margin-left:auto}.question-footer{margin-top:36px;display:flex;align-items:center;justify-content:space-between;gap:10px}.question-footer>span{font-size:10px;color:#aaa0b6}.answer-sheet{align-self:start;padding:23px}.answer-sheet h3{font-size:14px;margin:0 0 20px}.answer-sheet h3 span{float:right;font-size:12px;color:#9b91ab}.answer-sheet>div{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.answer-sheet>div button{border:1px solid #e7e3ec;border-radius:6px;background:white;color:#9991a5;aspect-ratio:1;font-size:12px}.answer-sheet>div button.filled{background:#e9e1fb;color:#7658b7}.answer-sheet>div button.current{outline:2px solid #9271d7;outline-offset:1px}.answer-sheet p{font-size:11px;line-height:1.9;color:#a096ae;margin:22px 0}.answer-sheet>.primary{width:100%}.review-card{margin:18px 0;font-size:13px}.review-card h3{font-size:17px;line-height:1.7}.review-card>p{line-height:1.8;color:#8c819a}.explanation{background:#f7f5fc;padding:18px;border-radius:8px;margin-top:20px;line-height:1.9;color:#7e728e}.explanation p{font-size:13px;margin:8px 0}.explanation strong{font-size:12px;color:#645578}.explanation small{display:block;color:#aca2b8;font-size:10px;margin-top:8px}.explanation a{color:#7661b2;font-size:11px}.correct-tag,.wrong-tag{font-size:11px;padding:5px 9px;border-radius:5px}.correct-tag{background:#e4f4ec;color:#47836b}.wrong-tag{background:#fff0ea;color:#c17c61}.correct-text{color:#44836c!important}.result{text-align:center;background:#efebfa;margin-bottom:30px;padding:35px}.result h2{font-size:48px;margin:18px 0}.result small{font-size:14px;font-weight:400;margin-left:12px}.result p{color:#9183a3;font-size:13px;margin-bottom:25px}.result .secondary{margin-left:10px}.filters{display:flex;gap:8px}.filters button{background:transparent;border:0;padding:10px 14px;color:#93879f;font-size:12px;border-radius:7px}.filters button.active{background:#e9e1f7;color:#6e50ac}.muted{color:#a196ac;font-size:12px}.empty{border:1px dashed #dcd4e6;padding:60px 24px;border-radius:15px;text-align:center;color:#9a8ca6;font-size:13px;line-height:2}.empty h2{color:#655474;font-size:22px}.history h2{font-size:18px;margin-bottom:20px}.history>div{display:flex;align-items:center;gap:25px;border-top:1px solid #f0ebf5;padding:20px 0;font-size:13px}.history span{color:#a093ad;font-size:12px}.history strong{margin-left:auto;color:#7e61b4}.welcome{padding:55px;background:#eee9fa;border-radius:20px;margin-top:30px}.welcome h2{font-size:45px}.welcome>small{display:block;font-size:11px;color:#9b8baa;margin-top:20px}.welcome-grid{display:flex;gap:70px;border-top:1px solid #dcd3ec;margin-top:45px;padding-top:30px}.welcome-grid div{font-size:12px;color:#9986a6}.welcome-grid b{font-size:30px;display:block;color:#796194;margin-bottom:8px}.error{background:#fff0eb;color:#b66c50;padding:15px;border-radius:9px;font-size:13px;margin-bottom:20px}.error button{border:0;background:none;text-decoration:underline;color:inherit}
@media(max-width:1100px){.sidebar{width:190px;padding:28px 15px}main{margin-left:190px;width:calc(100% - 190px);padding:30px}.quiz-layout{grid-template-columns:1fr}.answer-sheet>div{grid-template-columns:repeat(10,1fr)}.answer-sheet>div button{max-height:45px}.progress-ring{width:160px;height:160px;margin:0}.stats{gap:10px}.stats article{padding:17px}.modes{gap:12px}.modes article{padding:19px}.question-footer>span{display:none}}@media(max-width:760px){.sidebar{position:relative;width:100%;height:auto;padding:18px;border-right:0;border-bottom:1px solid #ece8f3;display:block}.shell{display:block}.brand{font-size:20px}.logo{width:36px;height:36px}.nav-label,.side-bottom{display:none}nav{flex-direction:row;margin-top:18px;justify-content:space-between;gap:3px}nav button{padding:9px;font-size:12px;gap:5px}nav button span{font-size:16px}nav em{font-size:9px}main{margin:0;width:100%;padding:24px 18px}header{align-items:start;margin-bottom:24px}h1{font-size:19px;line-height:1.6}.account{max-width:120px;justify-content:flex-end;font-size:9px}.account>span{display:none}.hero{padding:26px 22px;gap:12px}.hero h2{font-size:25px}.hero p{font-size:11px}.progress-ring{width:105px;height:105px;padding:6px}.progress-ring b{font-size:29px}.progress-ring small{font-size:12px}.progress-ring span{font-size:8px}.stats{grid-template-columns:repeat(2,1fr);margin-bottom:25px}.stats b{font-size:28px}.modes{grid-template-columns:1fr}.modes p{min-height:0}.section-head{align-items:start;flex-wrap:wrap}.section-head>span{display:none}.plan>div{grid-template-columns:1fr;gap:0}.question-card{padding:22px 18px}.question-card h2{font-size:19px}.question-meta{flex-wrap:wrap}.options button{font-size:13px;padding:13px}.question-footer{margin-top:25px}.primary{padding:12px 17px}.answer-sheet>div{grid-template-columns:repeat(5,1fr)}.review-card{padding:20px}.history{padding:20px}.history>div{gap:10px;flex-wrap:wrap}.history strong{margin-left:0}.welcome{padding:30px 23px}.welcome h2{font-size:35px}.welcome-grid{gap:25px}.welcome-grid b{font-size:25px}.welcome-grid div{font-size:10px}.result h2{font-size:36px}.result .secondary{margin-top:10px}}

.backup-bar{display:flex;gap:12px;align-items:center;flex-wrap:wrap;background:#f0edf9;border:1px solid #e4ddf4;border-radius:12px;padding:16px 20px;margin-bottom:24px}.backup-bar>div{flex:1;min-width:200px}.backup-bar b{font-size:12px;color:#6f5b97}.backup-bar p{font-size:11px;line-height:1.8;color:#8c809e;margin:6px 0 0}.import-label{cursor:pointer;position:relative;overflow:hidden}.import-label input{position:absolute;inset:0;opacity:0;width:100%;cursor:pointer}.account button{border:0;background:none;padding:0;color:#6854cc;font-size:11px}.welcome>.secondary{margin-left:12px;display:inline-block}.welcome>small{line-height:1.9}@media(max-width:760px){.welcome>.secondary{margin:12px 0 0}.backup-bar{padding:14px}.backup-bar>div{flex-basis:100%}}