/* Kaitor：原始品牌色作点缀，业务信息保持清晰。 */
:root{--ink:#26334a;--muted:#87909e;--line:#e9ebef;--paper:#f6f7f9;--green:#075be7}body{background:var(--paper)}.sidebar{background:#fff;border-right:1px solid var(--line);padding:26px 17px 18px}.brand{padding:0 12px;letter-spacing:0}.kaitor-logo{display:block;position:relative;overflow:hidden;width:162px;height:50px;background:#f6e7d1;border-radius:10px}.kaitor-logo img{position:absolute;width:256px;max-width:none;left:-47px;top:-12px}.brand small{color:#9498a2;letter-spacing:1px;font-size:10px;margin-top:10px}.sidebar nav{margin-top:27px;gap:4px}.nav{color:#747d8d;border-radius:8px;padding:11px 12px;font-size:12px}.nav b{color:#b5bbc5}.nav.active{background:#edf3ff;color:#075be7;box-shadow:inset 3px 0 #075be7}.nav.active b{color:#79a0e3}.nav:hover{background:#f5f7fb}.sidebar-foot{border-color:#eee;color:#a1a8b3;font-size:10px}.sidebar-foot strong{color:#536075}.main{padding:0 32px 36px}.topbar{height:65px;border-color:#e6e8ed;font-size:11px}.top-actions>button{background:#fff;border-color:#e5e7ec}.top-actions small{color:#8b96a4}.primary{background:#075be7;border-color:#075be7;box-shadow:none}.primary:hover{background:#064bc0}.panel{border-color:#e8ebef;border-radius:12px;box-shadow:none}.panel-head{padding:17px 20px}.panel-head h3{font-size:14px}.page-head h1{font-size:25px}.quiet-welcome{display:flex;justify-content:space-between;align-items:center;padding:33px 0 27px;gap:20px}.quiet-welcome>div>span{font-size:10px;color:#959dab;letter-spacing:1.8px}.quiet-welcome h1{font-size:26px;font-weight:650;line-height:1.5;margin:8px 0 7px;letter-spacing:-.5px}.quiet-welcome p{font-size:12px;color:#959da9;margin:0}.quiet-welcome>div:last-child{display:flex;gap:9px}.quiet-welcome button{font-size:11px;padding:10px 15px;background:#fff}.quiet-welcome 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i:nth-child(3){background:#ffad00}.promo-colors i:nth-child(4){background:#0099ac}.promo-colors i:nth-child(5){background:#ff4a2f}.promo-colors i:nth-child(6){background:#6b29ad}.quiet-shortcuts>div:last-child{display:grid;grid-template-columns:repeat(5,1fr);padding:19px 10px}.quiet-shortcuts button{position:relative;border:0;border-right:1px solid #edf0f4;border-radius:0;background:transparent;text-align:left;padding:2px 18px;min-width:0}.quiet-shortcuts button:last-child{border:0}.quiet-shortcuts button>small{font-size:9px;color:#b7bfcb;display:block;margin-bottom:12px}.quiet-shortcuts button>b{font-size:12px;display:block;font-weight:550}.quiet-shortcuts button>span{font-size:9px;color:#9da6b4;display:block;margin-top:5px}.quiet-shortcuts button>i{position:absolute;top:0;right:16px;color:#b0b9c8;font-style:normal}.home-report{margin-top:24px;border:1px solid #e8ebef;border-radius:10px;background:#fff;padding:16px 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@media(min-width:1650px){.main{padding-left:45px;padding-right:45px}.quiet-home-grid{grid-template-columns:minmax(0,1fr) 320px}.academy-promo{padding-left:30px}.academy-grid{gap:26px}.lesson-layout{grid-template-columns:minmax(0,1fr) 290px}}
@media(max-width:1150px){.main{padding-left:22px;padding-right:22px}.quiet-home-grid{grid-template-columns:minmax(0,1fr) 240px}.quiet-welcome h1{font-size:23px}.academy-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.quiet-shortcuts button{padding-left:12px;padding-right:8px}.quiet-shortcuts button>b{font-size:11px}.quiet-shortcuts button>span{font-size:8px}.lesson-layout{grid-template-columns:minmax(0,1fr) 200px}.quiet-welcome>div:last-child{flex-direction:column}.quiet-metrics>button{padding:16px}}
@media(max-width:800px){.sidebar{width:auto;padding:17px 15px}.brand{padding-left:4px}.sidebar nav{margin-top:20px}.main{padding:0 18px 25px}.quiet-welcome{padding-top:25px}.quiet-welcome h1{font-size:22px}.quiet-welcome p{font-size:10px}.quiet-welcome button{font-size:10px;padding:8px 10px}.quiet-metrics{grid-template-columns:repeat(2,1fr);gap:12px}.quiet-home-grid{grid-template-columns:1fr}.academy-promo{padding-bottom:26px}.academy-promo h2 br,.academy-promo p br{display:none}.academy-promo h2{font-size:22px;margin-top:12px}.academy-promo button{max-width:240px}.quiet-shortcuts>div:last-child{grid-template-columns:repeat(3,1fr);gap:20px 0}.quiet-shortcuts button{border:0}.academy-head h1{font-size:24px}.academy-toolbar{align-items:start;flex-direction:column}.lesson-layout{grid-template-columns:1fr}.lesson-side{order:2}.lesson-side>button{display:inline-flex;width:49%}.academy-grid{gap:15px}.course-info{padding:15px}.academy-head p{font-size:11px}.academy-start{padding:18px;gap:12px}.academy-start p{font-size:10px}.lesson-video-note{font-size:9px}}
@media(max-width:480px){.quiet-welcome{align-items:start;flex-direction:column}.quiet-welcome>div:last-child{flex-direction:row}.quiet-welcome h1{font-size:22px}.quiet-metrics strong{font-size:28px}.quiet-metrics>button>span:last-child{font-size:9px;right:12px}.quiet-shortcuts>div:last-child{grid-template-columns:repeat(2,1fr)}.academy-grid{grid-template-columns:1fr}.academy-progress{min-width:65px}.academy-progress b{font-size:28px}.academy-head h1{font-size:22px}.academy-start{flex-wrap:wrap}.academy-start>button{margin-left:54px}.academy-start>div{min-width:180px}.academy-head p{line-height:1.8}.lesson-head>span{font-size:8px}.lesson-title{font-size:23px}.lesson-side>button{width:100%}.lesson-actions button{padding:8px 10px}}
@media print{.quiet-welcome,.academy-grid,.academy-head,.lesson-player,.lesson-side,.academy-promo{display:none}.sidebar{display:none}.main{padding:0}}
/* 阅读版：减低白色亮度，提升所有业务页的字号和对比。 */
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