/* 知序 AI 学院 · Apple Edition — content-first, actual product surfaces.
   Apple Liquid Glass token layer is imported separately from the installed Skill. */
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0}.feedback{border-radius:13px;background:#f4f6f7;padding:16px 20px;margin:20px 0;color:#39454b}.feedback strong{display:block}.feedback p{margin:6px 0 0}.success{background:#ecf7f3;color:#1a6956}.warning{background:#fff4e8;color:#855623}.error{background:#fff0ef;color:#9b3e32}.plot{width:100%;height:auto;display:block;max-height:250px;overflow:visible}.plot line{stroke:#d9dfe1;stroke-width:1}.plot polyline{fill:none;stroke:#1d8796;stroke-width:1.6;vector-effect:non-scaling-stroke}.plot polyline.alt{stroke:#cf9165}.plot-label{font-size:12px;color:#868686}.metrics-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px}.metrics-list div{padding:16px;border-radius:13px;background:#f6f7f8}.metrics-list strong{display:block;font-size:20px;font-variant-numeric:tabular-nums}.metrics-list span{font-size:12px;color:#7c7c80}.inline-progress{display:flex;gap:7px;margin:0 0 24px}.inline-progress 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16px}.timeline-row{border-left:2px solid #dbe0e0;padding:0 0 27px 21px;margin:0 0 0 7px;position:relative}.timeline-row:before{content:"";position:absolute;width:11px;height:11px;background:#87b4b3;border-radius:50%;left:-6.5px;top:7px}.timeline-row:last-child{border:0}.timeline-row strong{font-size:15px}.timeline-row small{display:block;color:#888;font-size:12px}.timeline-row p{margin:4px 0;white-space:normal;color:#626267}.settings-group{max-width:830px;margin:23px 0 35px}.setting-row{display:flex;justify-content:space-between;gap:24px;align-items:center;min-height:67px;border-bottom:1px solid #e9e9eb}.setting-row:last-child{border:0}.setting-row small{color:#7c7c80;font-size:12px;display:block}.setting-row button{border:0;background:none;color:#117d8c;font-size:13px}.toggle{position:relative;width:50px;height:30px;border:0;background:#cacdd1;border-radius:22px;transition:background .2s}.toggle[aria-checked=true]{background:#238b93}.toggle::after{content:"";display:block;width:24px;height:24px;border-radius:50%;background:white;position:absolute;left:3px;top:3px;transition:transform .2s;box-shadow:0 1px 4px #0002}.toggle[aria-checked=true]::after{transform:translateX(20px)}.toast{position:fixed;left:50%;bottom:110px;transform:translate(-50%,12px);z-index:80;pointer-events:none;opacity:0;border-radius:15px;background:#252b31e8;color:#fff;padding:11px 18px;font-size:13px;max-width:90vw;text-align:center;transition:opacity .2s,transform .2s}.toast.show{opacity:1;transform:translate(-50%,0)}.mobile-dock{display:none}.modal-backdrop{position:fixed;inset:0;background:#10182065;z-index:40;display:grid;place-items:center;padding:16px}.modal-card{width:min(570px,100%);max-height:88dvh;overflow:auto;background:#fff;border-radius:25px;padding:30px}.modal-card h2{margin:0 0 15px;font-size:24px}.modal-card p{line-height:1.85}.modal-actions{display:flex;justify-content:flex-end;gap:10px}.original-note{display:flex;align-items:center;gap:8px;font-size:12px;color:#848484;margin-top:28px}.prewrap{white-space:pre-wrap;overflow-wrap:anywhere}
#original-engine{position:fixed!important;left:-10000px!important;top:0!important;width:760px;height:770px;border:0;visibility:hidden;pointer-events:none;z-index:-1}
[data-effect=off] .reading-cover:after{box-shadow:none}
@media(max-width:1200px){.app-shell{grid-template-columns:228px minmax(0,1fr)}.study-layout{gap:20px;grid-template-columns:180px minmax(0,1fr)}}
@media(max-width:950px){.app-shell{grid-template-columns:210px minmax(0,1fr)}.reading-hero{grid-template-columns:1fr 210px}.reading-cover{min-height:300px}.two-col{grid-template-columns:1fr}.study-layout{grid-template-columns:1fr}.study-rail{position:relative;top:auto;display:flex;align-items:center;overflow-x:auto;padding:8px}.study-rail h3{display:none}.study-stage{min-width:max-content}.lesson-paper{min-height:360px}.course-grid{grid-template-columns:1fr}}
@media(max-width:700px){.app-shell{display:block}.sidebar{display:none}.topbar{height:61px;padding:0 22px}.crumb{display:none}.mobile-brand{display:inline;font-size:18px;font-weight:710;letter-spacing:-.045em}.user-button{display:none}.edition-badge{font-size:10px}main{padding:25px 19px 135px;min-height:calc(100dvh - 61px)}.large-title{font-size:34px;line-height:1.24;margin-bottom:25px}.reading-hero{display:block;border-radius:24px}.reading-inner{padding:30px 25px}.reading-cover{display:none}.reading-inner h2{font-size:29px;line-height:1.39}.reading-inner>p{line-height:1.9;font-size:14px}.section-head{margin-top:35px}.unified{padding:6px 18px}.list-row{min-height:77px}.mobile-dock{position:fixed;display:flex;justify-content:space-around;align-items:center;z-index:10;bottom:max(11px,env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);width:min(440px,calc(100% - 28px));height:68px;padding:5px 6px;border-radius:27px;border:1px solid #ffffffdb;background:rgba(250,251,252,.8);-webkit-backdrop-filter:blur(27px) saturate(1.6);backdrop-filter:blur(27px) saturate(1.6);box-shadow:0 9px 32px #1c344528}.dock-link{width:20%;min-height:55px;display:grid;place-items:center;align-content:center;gap:2px;background:none;border:0;color:#686a6e;border-radius:18px;font-size:11px;padding:5px 0}.dock-link svg{width:22px;height:22px}.dock-link.selected{color:#077b88;font-weight:690}.data-metrics{padding:8px 0}.metric{padding:16px 13px}.metric strong{font-size:29px}.metric span{font-size:11px}.lesson-paper{padding:29px 23px}.study-rail{margin:0 -4px 14px}.study-stage{font-size:12px;min-height:43px;padding:6px 10px}.study-rail .stage-num{width:auto}.modal-card{padding:25px 21px}.form-actions .primary{width:100%}.reading-actions .primary{width:auto}.course-world{min-height:220px}.nav-item{min-width:0}}
@media(max-width:350px){main{padding-left:15px;padding-right:15px}.reading-inner{padding:25px 20px}.large-title{font-size:31px}.list-icon{width:38px;height:38px}.metric strong{font-size:24px}.lesson-paper{padding:25px 18px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}.reading-cover:after{filter:none}}
@media(prefers-reduced-transparency:reduce),(prefers-contrast:more){.mobile-dock{background:#fff;backdrop-filter:none;-webkit-backdrop-filter:none;border-color:#d4d4d6}}

/* Native shared-geometry page transition: same teaching surface moves from reading preview to lesson. */
.reading-inner,.lesson-paper{view-transition-name:lesson-focus}
::view-transition-old(root),::view-transition-new(root){animation-duration:.23s;animation-timing-function:ease-out}
::view-transition-old(lesson-focus),::view-transition-new(lesson-focus){animation-duration:.44s;animation-timing-function:cubic-bezier(.22,.74,.15,1)}
.experiment-picker{display:flex;align-items:center;gap:15px;flex-wrap:wrap;margin:-8px 0 28px}
.experiment-picker lg-segmented{--lg-track:#e8eded;--lg-accent:#107888;--lg-surface:#ffffff;--lg-text-muted:#5e6468;--lg-radius:15px}
.experiment-picker lg-segmented button{font-size:13px}
.show-original-engine{overflow:hidden}
.show-original-engine #original-engine{position:fixed!important;left:50%!important;top:50%!important;transform:translate(-50%,-50%);width:min(740px,92vw)!important;height:min(790px,87dvh)!important;z-index:96!important;visibility:visible!important;pointer-events:auto!important;border:9px solid #fff!important;border-radius:19px!important;box-shadow:0 28px 90px #0004}
#ai-config-shade{z-index:93;align-items:flex-start;justify-content:flex-end;padding:15px 20px}
#close-ai-config{z-index:97;position:fixed;right:20px;top:14px;background:#fff;color:#165b66;box-shadow:0 2px 20px #0003}
lg-navbar.mobile-dock{--lg-text:#1f292d;--lg-tint-strong:rgba(255,255,255,.75);--lg-indicator:rgba(255,255,255,.7);--lg-surface:rgba(245,248,248,1);color:#51565a;isolation:isolate}
lg-navbar.mobile-dock .dock-link{display:grid;align-content:center;justify-items:center;height:55px;font-size:11px;padding:5px 0;gap:2px;line-height:1.15;width:20%;color:#686a6e}
lg-navbar.mobile-dock .dock-link.selected{color:#087a89}
lg-navbar.mobile-dock .lg-nav__copy{border-radius:23px;overflow:hidden}
lg-navbar.mobile-dock .lg-nav__copy>span{width:20%;height:55px;display:grid;place-content:center;padding:5px 0;font-size:11px;line-height:1.15}
@media(max-width:700px){
 .experiment-picker{margin:-6px 0 18px;gap:9px}
 .experiment-picker .subline{font-size:12px}
 .experiment-picker lg-segmented{width:100%;justify-content:space-between}
 .experiment-picker lg-segmented button{font-size:12px;padding:0 10px;flex:1}
 .study-rail{margin-bottom:16px}
 .show-original-engine #original-engine{height:min(710px,86dvh)!important;width:94vw!important}
 #close-ai-config{top:5px;right:10px;font-size:12px;min-height:38px}
}
@media(prefers-reduced-motion:reduce){::view-transition-old(*),::view-transition-new(*){animation-duration:0.01ms!important}}

@media(min-width:701px) and (max-width:900px){
 .reading-hero{grid-template-columns:1fr}
 .reading-cover{display:none}
}
.edition-compare{color:#246e7c;font-size:12px;font-weight:620;white-space:nowrap}.edition-compare:hover{text-decoration:underline;text-underline-offset:4px}
@media(max-width:390px){.top-right{gap:9px}.edition-compare{font-size:11px}}@media(max-width:700px){.topbar .user-button{display:grid;place-items:center;width:34px;height:34px;flex:none}}`n[data-effect=off] .mobile-dock, [data-effect=off] lg-navbar.mobile-dock {backdrop-filter:none!important;-webkit-backdrop-filter:none!important;background:#fff!important;border-color:#d8dadd!important;} [data-effect=off] .reading-cover lg-lens {display:none!important;}
/* Keep installed segmented control's real optical indicator, but avoid double-drawn labels
   when the refracted copy overlaps native text at small Chinese-language widths. */
.experiment-picker lg-segmented{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));width:min(410px,100%);--lg-track:#e9eded;--lg-accent:#107888}
.experiment-picker lg-segmented>button.lg-seg__option{min-width:0;width:100%;height:37px;padding:0 5px;font-size:12px}
.experiment-picker lg-segmented>button[aria-checked=true]{font-weight:700;color:#0d7180}
.experiment-picker lg-segmented .lg-refract{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}
.experiment-picker lg-segmented .lg-refract .lg-seg__option{visibility:hidden;min-width:0}
.evo-table-wrap{overflow-x:auto;max-width:100%}
.evo-table-wrap .data-table{width:100%;min-width:365px}
.evo-table-wrap .data-table td,.evo-table-wrap .data-table th{font-variant-numeric:tabular-nums}
@media(max-width:700px){
 .experiment-picker lg-segmented{width:100%}
 .evo-table-wrap .data-table{min-width:unset;table-layout:fixed}
 .evo-table-wrap .data-table td,.evo-table-wrap .data-table th{padding:10px 4px;font-size:11px;overflow-wrap:anywhere}
}

.table-scroll{max-width:100%;overflow-x:auto;overscroll-behavior-inline:contain;border-radius:13px;border:1px solid #e8ebed;margin:18px 0}.table-scroll table{min-width:450px;background:#fff}.table-scroll:focus-visible{outline:3px solid #0a8493;outline-offset:2px}
.study-layout,.lesson-paper{min-width:0}.table-scroll{width:100%;max-width:100%;overflow-x:auto}.table-scroll table{min-width:450px}
@media(max-width:700px){.user-button{display:grid;place-items:center;width:36px;height:36px;border-radius:50%;flex:none}.user-button svg{width:18px;height:18px}}@media(max-width:350px){.edition-badge{display:none}}