@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&display=swap');
.training-toolbar,.library-toolbar{display:flex;align-items:center;gap:16px;margin-bottom:22px;flex-wrap:wrap;font-size:14px;color:#5373a1}.training-toolbar>div{display:flex;align-items:center;gap:12px}.training-toolbar>span{margin-left:auto}.training-toolbar select,.library-toolbar input{font:inherit;border:1px solid #d2dbe8;background:white;border-radius:7px;padding:11px 13px;color:#2e405a;max-width:100%}.library-toolbar input{flex:1;min-width:180px}.question-dots{flex-wrap:wrap}.coverage-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.coverage-stats section{padding:23px;background:white;border:1px solid #dce3ed;border-radius:10px}.coverage-stats strong{display:block;font-size:28px;color:#31496a;margin-bottom:10px}.coverage-stats span{font-size:13px;color:#6786b1}.source-list{background:white;border:1px solid #dce3ed;border-radius:10px;overflow:hidden}.source-row{display:grid;grid-template-columns:minmax(0,1fr) 185px 150px;align-items:center;gap:15px;padding:18px 24px;border-bottom:1px solid #e5eaf1}.source-row:last-child{border:0}.source-row h2{font-size:14px;font-weight:500;line-height:1.7;overflow-wrap:anywhere;margin:0}.source-row p{font-size:12px;color:#6c8ab3;margin:5px 0 0}.source-status{font-size:12px;color:#4c6a94}.source-progress{font-size:12px;color:#6e8bb4;text-align:right}@media(max-width:850px){.coverage-stats{grid-template-columns:1fr 1fr}.source-row{grid-template-columns:1fr}.source-progress{text-align:left}.training-toolbar>span{margin-left:0}.sidebar nav{flex-wrap:wrap}.sidebar .nav-item{width:auto;flex:1;white-space:nowrap}.training-toolbar select{max-width:230px}}@media(max-width:480px){.coverage-stats section{padding:17px}.training-toolbar>div{flex-wrap:wrap}.training-toolbar select{max-width:100%}.sidebar .nav-item{flex-basis:40%}}
:root{font-family:'DM Sans','Microsoft YaHei',sans-serif;color:#1c2635;background:#f0f4fa;font-synthesis:none;font-size:16px;--accent:#1e4070;--dark:#101c2c;--muted:#5474a2;--line:#dde4ed}*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:disabled{cursor:default}button,a,input{outline-offset:5px}button:focus-visible,a:focus-visible{outline:3px solid #527cb7}a{color:inherit}.sidebar{position:fixed;inset:0 auto 0 0;width:232px;background:#111d2d;color:#d2dbe8;padding:35px 22px;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:7px;font-size:27px;font-weight:700;text-decoration:none;letter-spacing:-1px;color:#fff}.brand>span:last-child{font-weight:400;color:#7b96bb}.brand-icon{display:inline-grid;place-items:center;color:#92b2df;border:1px solid #4d6b95;border-radius:8px;width:34px;height:34px;margin-right:6px;font-size:25px;letter-spacing:3px}.side-label{font-size:12px;letter-spacing:2px;color:#7f99bd;margin:18px 0 33px}nav{display:grid;gap:8px}.nav-item{background:transparent;border:0;color:#aebed5;width:100%;display:flex;align-items:center;gap:13px;text-align:left;border-radius:8px;padding:14px;font-size:15px}.nav-item>span:first-child{font-size:20px;width:22px}.nav-item.active{background:#263549;color:#a9c7f0}.nav-item:hover{background:#212d3f}.nav-count{margin-left:auto;font-size:12px;background:#2d3e56;padding:2px 7px;border-radius:4px}.side-course{border-top:1px solid #293950;margin-top:43px;padding:8px 13px}.side-course .side-label{margin:20px 0}.side-course strong{font-size:16px;font-weight:500}.side-course p{font-size:14px;color:#8aa1c2;margin:9px 0 21px}.course-line{height:3px;background:#28374d;border-radius:3px;margin-bottom:12px}.course-line span{display:block;width:8%;height:100%;background:#84a1c9}.side-course small{font-size:12px;color:#7f99bd}.side-bottom{margin-top:auto;display:flex;align-items:center;gap:11px;font-size:14px}.side-bottom small{display:block;font-size:12px;color:#7591b8;margin-top:5px}.avatar{width:35px;height:35px;display:grid;place-items:center;border-radius:50%;background:#2f425c;color:#c7d5e8;font-size:12px}.workspace{margin-left:232px}.topbar{height:80px;padding:0 42px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;background:#f9fbfd;font-size:14px;color:#5b7caa}.topbar strong{font-weight:500;color:#2c3e56}.slash{margin:0 13px;color:#b2c1d7}.preview-pill{font-size:12px;padding:6px 11px;border:1px solid #d4dde9;border-radius:20px;color:#4b6891}main{max-width:1400px;margin:auto;padding:36px 42px 44px}.page-intro{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:27px}.eyebrow{font-size:12px;font-weight:700;letter-spacing:2px;color:#6181ae;margin-bottom:10px}h1{font-size:30px;line-height:1.4;letter-spacing:-.8px;margin:0 0 9px;font-weight:600}.subtitle{font-size:14px;color:var(--muted);margin:0;line-height:1.7}.session-meta{text-align:right;color:#5c7dab;font-size:12px}.session-meta strong{display:block;font-size:22px;color:#293a51;margin-bottom:5px;font-weight:500}.practice-layout{display:grid;grid-template-columns:minmax(0,1fr) 276px;gap:24px;align-items:start}.question-card{background:white;border:1px solid var(--line);border-radius:13px;overflow:hidden}.question-head{display:flex;align-items:center;justify-content:space-between;padding:19px 26px;border-bottom:1px solid #e9eef4;font-size:13px;color:#6e8bb4}.badges{display:flex;gap:8px}.badge{font-size:12px;display:inline-block;padding:5px 9px;border-radius:4px;color:#3d5577;background:#edf0f5}.badge.gray{background:#ecf2fa;color:#5474a2}.question-body{padding:25px 28px}.question-title{font-size:19px;line-height:1.75;font-weight:500;margin:0 0 9px}.question-hint{font-size:13px;color:#6886b1;margin:0 0 20px;line-height:1.6}.chart-panel{background:#f6f8fc;border:1px solid #e6ebf2;border-radius:8px;margin:22px 0;padding:14px 18px 10px}.chart-caption{display:flex;justify-content:space-between;font-size:12px;color:#6d8bb4}.chart-caption strong{font-size:13px;color:#476289;font-weight:500}.chart-panel svg{width:100%;height:190px;display:block}.options{display:grid;gap:11px;margin:22px 0}.option{width:100%;border:1px solid #d9e1ec;background:#fff;padding:14px 17px;display:flex;gap:14px;align-items:center;text-align:left;border-radius:7px;color:#334764;transition:background .15s,border-color .15s;line-height:1.55;font-size:15px}.option-letter{display:grid;place-items:center;flex:none;width:28px;height:28px;border:1px solid #dce3ed;border-radius:5px;font-size:12px;color:#6c8ab3}.option:hover:not(:disabled){border-color:#708db5;background:#f6f9fd}.option.selected{border-color:#3b5c8a;background:#eef3fa}.option.selected .option-letter{background:#24426b;border-color:#24426b;color:#fff}.option.correct{border-color:#3b5c8a;background:#edf1f7}.option.incorrect{border-color:#cc8176;background:#fcf1ee}.option-result{margin-left:auto;color:#425c80;font-size:17px}.question-actions{border-top:1px solid #e5eaf2;padding-top:22px;display:flex;align-items:center;justify-content:space-between;gap:12px}.text-button{border:0;background:transparent;color:#5374a2;font-size:13px;padding:8px 0}.primary{border:0;border-radius:7px;padding:12px 24px;background:#22406a;color:#fff;font-size:14px;font-weight:500;min-height:44px}.primary:hover{background:#152d4f}.primary:disabled{background:#dfe6ef;color:#839cbf}.secondary{border:1px solid #c7d2e2;background:white;color:#2e476b;border-radius:7px;padding:11px 18px;font-size:14px}.aside-panel{background:white;border:1px solid var(--line);border-radius:11px;padding:22px;margin-bottom:18px}.aside-panel h2{font-size:15px;font-weight:600;margin:0 0 20px}.progress-row{display:flex;justify-content:space-between;font-size:13px;color:#5c7dab;margin-bottom:12px}.progress-row strong{color:#30425c;font-weight:500}.progress-track{height:5px;background:#ebeff4;border-radius:4px;overflow:hidden}.progress-track span{display:block;background:#5273a0;height:100%;transition:width .3s}.question-dots{display:flex;gap:9px;margin:22px 0}.question-dot{width:35px;height:35px;border:1px solid #dce3ed;background:#fff;color:#809abe;border-radius:6px;font-size:13px}.question-dot.current{border-color:#5678a8;color:#395172;background:#edf2fa}.question-dot.right{background:#27446d;color:#fff;border-color:#27446d}.question-dot.wrong{background:#f7e7e3;color:#a86055;border-color:#eecdc5}.stats{display:flex;gap:22px;padding-top:17px;border-top:1px solid #e9eef4}.stats strong{font-size:22px;font-weight:500;display:block;color:#2e405a}.stats small{font-size:12px;color:#6a88b2}.knowledge-teaser{display:flex;align-items:center;gap:11px;background:#eff4fa;padding:13px;border-radius:7px;margin:14px 0;font-size:14px;color:#384e6d}.knowledge-teaser span{font-size:19px}.aside-copy{font-size:13px;color:#6584b0;line-height:1.85;margin:0}.tip-panel{padding:5px 16px}.tip-panel h3{font-size:13px;color:#4f6e99;margin:8px 0}.tip-panel p{font-size:13px;color:#6c8ab4;line-height:1.85}.feedback{margin:20px 0 0;padding:19px;background:#edf2fa;border:1px solid #d5dde9;border-radius:8px;line-height:1.8;font-size:14px}.feedback.wrong{background:#fff7f1;border-color:#eadccd}.feedback h3{margin:0 0 8px;font-size:16px}.feedback p{margin:6px 0}.feedback details{border-top:1px solid #d9e0eb;margin-top:12px;padding-top:10px}.feedback summary{cursor:pointer;font-size:13px;color:#415b7f}.source{font-size:12px!important;color:#5b7cab;margin-top:12px!important}.section-heading{font-size:16px;margin:28px 0 15px}.knowledge-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.knowledge-card{background:white;border:1px solid var(--line);border-radius:12px;padding:25px;text-align:left;display:block;color:inherit}.knowledge-card:hover{border-color:#6f8cb5}.knowledge-number{font-size:12px;color:#6886b1;letter-spacing:1px}.knowledge-card h2{font-size:20px;font-weight:500;margin:25px 0 8px}.knowledge-card p{font-size:14px;line-height:1.9;color:#5a7baa}.card-bottom{margin-top:26px;padding-top:16px;border-top:1px solid #eaeef4;font-size:13px;color:#365075;display:flex;justify-content:space-between}.empty{background:#fff;border:1px solid var(--line);border-radius:12px;padding:70px 25px;text-align:center}.empty h2{font-size:22px;font-weight:500}.empty p{font-size:14px;color:#5f7fac;margin-bottom:28px}.result-number{font-size:68px;font-weight:500;color:#284267;letter-spacing:-4px}.result-number small{font-size:23px;letter-spacing:0;color:#7692b9}.review-list{display:grid;gap:15px}.review-card{background:white;border:1px solid var(--line);padding:24px;border-radius:10px}.review-card h2{font-size:17px;line-height:1.8;font-weight:500}.review-card p{font-size:14px;line-height:1.9;color:#5373a1}footer{padding:0 42px 24px;display:flex;justify-content:space-between;gap:15px;font-size:12px;color:#8099bd}.footer-dot{margin:0 8px}dialog{border:0;border-radius:15px;width:min(660px,calc(100% - 28px));max-height:88vh;padding:0;color:#222f41;box-shadow:0 24px 90px #0b172740}dialog::backdrop{background:#101b2b80;backdrop-filter:blur(3px)}.dialog-top{position:sticky;top:0;display:flex;justify-content:space-between;align-items:center;background:white;padding:18px 28px;border-bottom:1px solid var(--line);font-size:14px;color:#5f7fac}.icon-button{border:0;background:#edf2fa;border-radius:50%;font-size:25px;width:34px;height:34px;color:#4b6891}#dialog-content{padding:25px 30px 35px}#dialog-content h2{font-size:26px;margin:0 0 5px}.english{font-size:14px;color:#718eb6}.knowledge-section{margin-top:25px}.knowledge-section h3{font-size:14px;color:#2d4b74;margin:0 0 8px}.knowledge-section p{font-size:15px;line-height:1.9;margin:5px 0}.basis{font-size:12px;color:#6d8bb4}.notice{font-size:13px;color:#5b7cab;line-height:1.8;margin:20px 0}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(min-width:1500px){main{padding-top:45px}.question-body{padding:30px 35px}.chart-panel svg{height:230px}}@media(max-width:1150px){.sidebar{width:194px;padding:30px 15px}.workspace{margin-left:194px}.practice-layout{grid-template-columns:minmax(0,1fr) 235px;gap:18px}main{padding:28px 25px}.topbar{padding:0 25px}.aside-panel{padding:18px}.question-body{padding:22px}.knowledge-grid{grid-template-columns:1fr 1fr}footer{padding-left:25px;padding-right:25px}}@media(max-width:850px){.sidebar{position:static;width:100%;padding:18px 22px;display:block}.brand{font-size:23px}.sidebar>.side-label,.side-course,.side-bottom{display:none}nav{display:flex;margin-top:18px;gap:5px}.nav-item{justify-content:center;padding:10px;font-size:14px}.nav-item>span:first-child{display:none}.nav-count{margin-left:4px}.workspace{margin:0}.topbar{height:56px}.practice-layout{grid-template-columns:1fr}.practice-aside{display:grid;grid-template-columns:1fr 1fr;gap:16px}.tip-panel{display:none}.aside-panel{margin:0}.session-meta{display:none}h1{font-size:26px}.question-card{border-radius:10px}.knowledge-grid{grid-template-columns:1fr}footer{flex-direction:column;margin-top:10px}}@media(max-width:480px){main{padding:24px 15px}.topbar{padding:0 16px;font-size:12px}.question-head{padding:15px}.question-body{padding:18px}.question-title{font-size:17px}.chart-panel{padding:12px 8px}.practice-aside{grid-template-columns:1fr}.question-actions{align-items:stretch}.primary{padding:12px 17px}.text-button{font-size:12px}.nav-item{font-size:13px}.option{padding:12px}.subtitle{font-size:13px}.preview-pill{font-size:12px}.chart-caption{font-size:12px;gap:12px}}


/* Course and knowledge filters */
.training-toolbar{flex-wrap:wrap;gap:14px}.training-toolbar>div{min-width:160px;flex:1}.training-toolbar select{width:100%;max-width:350px}.question-title,.feedback p,.review-card p{white-space:pre-line}.question-head{gap:12px;flex-wrap:wrap}.badges{flex-wrap:wrap}.source p{overflow-wrap:anywhere}.option{line-height:1.7}.question-actions{flex-wrap:wrap;gap:12px}@media(max-width:700px){.training-toolbar>div{min-width:100%}.training-toolbar select{max-width:100%}}

.question-actions{justify-content:flex-end}

/* Blue learning surface */
:root{background:#f2f7ff;color:#1b2f50;--accent:#2463cc;--line:#dce6f4;--muted:#61738e}
.sidebar{background:#102a50}.nav-item.active{background:#21477e;color:#d6eaff}.nav-item:hover{background:#1c3c68}
.primary{background:#245fc7}.primary:hover{background:#19499e}.secondary{color:#2455a1;border-color:#bfd0e8}
.option.selected,.option.correct{border-color:#3875cc;background:#eef5ff}.option.selected .option-letter{background:#245fc7;border-color:#245fc7}
.feedback{background:#edf5ff;border-color:#cbdcf3}.feedback.wrong{background:#fff7f1;border-color:#eadccd}
.subtitle,.question-hint,.aside-copy,.tip-panel p,.review-card p{color:#61738e}
.question-title{font-size:20px}.option,.feedback,.review-card p{font-size:16px}.badge,.question-hint{font-size:14px}