/* 知物 / Curious Matter — a bold, readable science playground. */
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/* The learning workspace uses the same larger type and stronger hierarchy. */
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@media(min-width:1600px){main{padding:38px 44px}.hero{min-height:430px}.hero-copy{padding:38px 40px}.hero h2{font-size:59px}.hero-art>svg{max-height:420px}.card-visual{height:230px}.card-body h3{font-size:21px}.card-body p{font-size:15px}}
@media(max-width:1250px){.sidebar{width:207px;padding-left:13px;padding-right:13px}.app-shell{margin-left:207px}.sidebar .nav-item{font-size:13px;gap:8px}.brand{font-size:35px}.topbar{padding:0 27px}main{padding:27px}.hero h2{font-size:44px}.hero-copy{padding-left:28px}.hero p{font-size:14px}.hero-buttons{gap:6px}.hero-buttons .button{font-size:13px;padding:10px 13px}.hero-art{min-height:330px}.hero{min-height:380px}.experiment-grid{gap:18px}.card-visual{height:184px}.card-body{padding:18px 17px 14px}.card-body h3{font-size:18px}.card-body p{font-size:13px;min-height:49px}.path-item{padding:14px 12px;gap:9px}.path-item .path-icon{width:36px;height:36px;border-radius:10px}.path-item strong{font-size:13px}.path-item small{font-size:11px}.section-heading h2{font-size:25px}.section-heading h2 small{display:none}.segmented button{padding:7px 10px;font-size:11px}.lab-layout{grid-template-columns:minmax(0,1fr) 282px}.lab-heading h1{font-size:29px}.parameter label{font-size:13px}.panel{padding:18px}.lab-toolbar .button{font-size:12px;padding:9px 12px}.content-layout{grid-template-columns:1fr}.content-layout>aside{display:grid;grid-template-columns:1fr 1fr;gap:18px}.card-tags span{font-size:10px}.card-foot small{font-size:11px}.card-foot .experiment-link{font-size:12px}.filter-row>small{display:none}}
@media(max-width:1020px){.sidebar{width:193px;padding-left:11px;padding-right:11px}.app-shell{margin-left:193px}.brand{gap:9px;margin-left:7px;font-size:33px}.brand-mark{width:41px;height:45px;font-size:37px;line-height:38px}.brand-mark i{left:16px;top:25px}.workspace-label{font-size:11px;letter-spacing:0}.sidebar .nav-item{padding:10px 9px;font-size:12px;min-height:43px}.pro-note{padding:12px}.pro-note h3{font-size:15px}.pro-note p{font-size:11px}.hero{grid-template-columns:1.05fr 1fr;min-height:360px}.hero h2{font-size:39px}.hero-copy{padding:28px 0 27px 24px}.hero p{font-size:13px}.hero-art{padding:12px 0;min-height:310px;margin-left:-20px}.hero-number{font-size:8px;right:15px}.hero-pill{font-size:10px}.hero-buttons .button{font-size:12px;padding:9px 11px;min-height:40px}.hero-buttons .button.ghost{padding-left:0}.hero-stamp{font-size:12px;bottom:20px;right:15px}.quick-path{gap:10px}.path-item .path-icon{display:none}.path-item strong{font-size:13px}.path-item small{font-size:10px}.experiment-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:19px}.card-visual{height:200px}.card-body h3{font-size:19px}.card-body p{font-size:14px}.card-foot .experiment-link{font-size:13px}.card-foot small{font-size:12px}.card-tags span{font-size:11px}.lab-layout{grid-template-columns:1fr}.lab-side{display:grid;grid-template-columns:1fr 1fr;gap:17px}.lab-side .panel{margin-bottom:0}.lab-heading{display:block}.lab-toolbar{justify-content:flex-start;margin-top:16px}.parameter label{font-size:14px}.panel{padding:21px}.panel h3{font-size:18px}.scene-controls .button{font-size:14px}.plan-grid{grid-template-columns:1fr}.plan-card ul{display:flex;gap:24px;flex-wrap:wrap}.plan-card .button{width:auto}.plan-card .price small{display:inline-block;margin-left:10px}.top-actions{gap:13px}.text-button,.profile{font-size:12px}.breadcrumbs{font-size:12px}.dashboard-stats{grid-template-columns:1fr 1fr}.teacher-mode .lab-layout{grid-template-columns:1fr}.teacher-mode .lab-side{grid-template-columns:1fr 1fr}.welcome-row h1{font-size:29px}.welcome-row p{font-size:14px}}
@media(max-width:760px){.sidebar{width:244px;transform:translateX(-100%);box-shadow:20px 0 80px #263b3320}.sidebar.open{transform:translateX(0)}.app-shell{margin-left:0}.sidebar .nav-item{font-size:15px;padding:11px 13px;min-height:47px}.sidebar .brand{font-size:37px;margin-left:9px}.workspace-label{font-size:12px}.sidebar-label{font-size:12px}.pro-note h3{font-size:18px}.pro-note p{font-size:12px}.mobile-menu{display:inline-grid!important}.topbar{height:66px;padding:0 20px}.breadcrumbs{font-size:11px}.breadcrumbs span{margin:0 8px}.top-actions{gap:8px}.top-actions .text-button,.desktop-label,.top-divider{display:none}.avatar{width:32px;height:32px}.profile{padding:0}.icon-button{width:38px;height:38px}main{padding:26px 20px 20px}.welcome-row{margin-bottom:21px}.welcome-row .eyebrow{font-size:9px;letter-spacing:1.4px}.welcome-row h1{font-size:29px;margin:7px 0}.welcome-row p{font-size:14px;max-width:100%}.date-label{display:none}.hero{grid-template-columns:1fr;min-height:0;border-radius:21px}.hero-copy{padding:28px 27px 2px}.hero-pill{font-size:11px;padding:5px 9px}.hero h2{font-size:43px;line-height:1.28;letter-spacing:0;margin:20px 0 15px}.hero h2 br{display:block}.hero p{font-size:15px;max-width:100%;line-height:1.85;margin-bottom:21px}.hero-buttons{gap:10px;flex-wrap:wrap}.hero-buttons .button{font-size:13px;padding:10px 13px;min-height:43px}.hero-art{height:276px;min-height:0;margin:0;padding:0 18px 4px}.hero-art>svg{width:100%;height:100%}.hero-number{display:none}.hero-stamp{font-size:13px;bottom:22px;right:25px}.art-note{font-size:10px;right:19px;bottom:13px}.quick-path{grid-template-columns:1fr;gap:10px;margin:23px 0 33px}.path-item{padding:14px 16px;gap:14px;border-radius:13px}.path-item .path-icon{display:grid;width:42px;height:42px;border-radius:12px}.path-item strong{font-size:15px}.path-item small{font-size:12px}.section-heading{align-items:flex-start;flex-direction:column;gap:14px;margin-bottom:17px}.section-heading h2{font-size:25px;line-height:1.5}.section-heading .segmented{width:100%;justify-content:space-between}.section-heading .segmented button{flex:1;font-size:12px;padding:8px;min-height:36px}.filter-row{gap:7px;margin-bottom:20px}.chip{font-size:12px;padding:7px 12px;min-height:37px}.experiment-grid{grid-template-columns:1fr;gap:21px}.card-visual{height:218px}.card-visual>svg{padding:10px 10px 0}.card-label{font-size:12px;top:15px;left:17px;padding:4px 9px}.card-number{display:block;font-size:10px;top:17px;right:17px}.card-body{padding:20px 21px 17px}.card-body h3{font-size:21px;line-height:1.6;margin-bottom:9px;min-height:0}.card-body p{font-size:15px;line-height:1.8;min-height:0;margin-bottom:17px}.card-tags span{font-size:12px;padding:3px 7px}.card-tags{gap:7px}.card-foot{margin-top:18px;padding-top:13px;flex-wrap:nowrap}.card-foot small{font-size:12px}.card-foot .experiment-link{font-size:14px;padding:5px 0}.bottom-banner{padding:22px 21px;gap:17px;margin-top:25px}.bottom-banner strong{font-size:21px;line-height:1.6}.bottom-banner p{font-size:14px;line-height:1.8;margin-top:6px}.bottom-banner button{font-size:13px;min-height:43px;margin-left:0;padding:9px 14px}.bottom-banner .banner-icon{display:none}footer{font-size:11px;line-height:1.9;padding:20px 21px 25px;flex-direction:column;gap:9px}footer button{font-size:11px;margin-left:8px}.lab-heading h1{font-size:28px;line-height:1.6}.lab-heading .eyebrow{font-size:10px;letter-spacing:1.3px}.lab-heading p{font-size:15px;line-height:1.85}.lab-toolbar{gap:9px;margin-top:17px}.lab-toolbar .button{font-size:13px;padding:10px 13px}.back-link{font-size:13px;margin-bottom:18px}.steps{padding:13px 9px;gap:4px;border-radius:12px;margin-bottom:21px}.step{font-size:11px;gap:5px;line-height:1.5}.step i{width:23px;height:23px;font-size:10px;flex-shrink:0}.step-arrow{font-size:11px}.lab-side{grid-template-columns:1fr;gap:17px}.lab-layout{gap:20px}.canvas-wrap{aspect-ratio:1.4}.scene-top{padding:13px 12px;gap:6px;flex-wrap:wrap}.live-badge{font-size:12px}.scene-top small{font-size:10px}.scene-status{font-size:10px;left:10px;top:11px;padding:5px 8px;max-width:calc(100% - 20px)}.scene-hint{font-size:9px;right:10px;bottom:9px}.scene-controls{padding:12px 10px;gap:7px}.scene-controls .button{font-size:12px;min-height:39px;padding:8px 10px}.speed-select{font-size:11px;margin-left:auto}.speed-select select{font-size:11px;padding:7px}.overlay-options{font-size:11px;padding:2px 12px 14px;gap:11px}.overlay-options label{gap:4px}.energy-bars{font-size:10px;gap:7px;padding:0 12px 14px}.energy-bars progress{width:70px}.energy-bars small{font-size:9px}.metrics{gap:8px;margin-top:13px}.metric{padding:12px 10px;border-radius:11px}.metric small{font-size:10px;line-height:1.6}.metric strong{font-size:25px;margin-top:6px;letter-spacing:-.9px;line-height:1.5}.metric strong em{font-size:10px;margin-left:3px}.explain-panel{padding:21px 18px;border-radius:14px;margin-top:20px}.explain-panel h3{font-size:19px;line-height:1.7}.explain-panel p{font-size:15px;line-height:1.9}.hint-content{font-size:14px}.result-box{padding:16px}.result-box h4{font-size:16px}.result-box p{font-size:14px}.prediction-question{font-size:16px}.prediction-options button{font-size:14px;padding:9px 12px}.prediction-note{font-size:12px}.panel{padding:21px;border-radius:14px}.panel h3{font-size:19px;margin-bottom:19px}.parameter label{font-size:15px}.parameter output{font-size:17px}.parameter{margin:26px 0}.range-labels{font-size:11px}.panel-note{font-size:13px;line-height:1.9}.lab-side .segmented button{font-size:12px;padding:8px 10px;flex:1}.lab-side .segmented{justify-content:space-between}.presets button{font-size:13px;padding:8px 11px}.model-details summary,.model-details p{font-size:13px}.reflection{font-size:15px;min-height:100px}.challenge h4{font-size:18px}.challenge .feedback,#ex-feedback{font-size:14px}.record-page h1,.tool-page h1{font-size:29px;line-height:1.5}.page-intro{font-size:15px;line-height:1.9}.tool-grid{grid-template-columns:1fr;gap:19px}.tool-card{padding:23px}.tool-card h3{font-size:22px}.tool-card p{font-size:15px}.record-card{padding:21px;display:block}.record-card h3{font-size:20px}.record-card p{font-size:14px}.record-card .button{margin-top:12px}.empty-state h3{font-size:22px}.empty-state p{font-size:15px}.consent{font-size:13px;padding:15px}.workspace-notice{font-size:12px;padding:14px}.workspace-notice span{display:block}.workspace-bar{gap:13px}.workspace-bar>span{font-size:13px}.workspace-bar .button{font-size:12px;padding:9px 12px}.workspace-bar h2{font-size:23px}.workspace-bar select{font-size:13px}.workspace-section-title{font-size:20px}.dashboard-stats{gap:11px}.dashboard-stats .metric{padding:16px}.dashboard-stats .metric strong{font-size:31px}.dashboard-stats .metric small{font-size:11px}.assignment-card{padding:21px;display:block}.assignment-card h3{font-size:20px}.assignment-card p{font-size:14px}.assignment-card small{font-size:12px}.assignment-actions{flex-direction:row;gap:8px;margin-top:17px;flex-wrap:wrap}.assignment-actions .button{font-size:12px;padding:9px 11px}.tag-outline{font-size:11px}.content-layout{grid-template-columns:1fr}.content-layout>aside{grid-template-columns:1fr}.content-layout .panel{padding:21px}.form-field{font-size:15px}.form-field input,.form-field textarea,.form-field select,.form-input{font-size:16px}.task-banner{gap:10px;padding:16px}.task-banner strong{font-size:15px}.task-banner span{font-size:13px;flex-basis:100%}.plan-grid{gap:19px}.plan-card{padding:25px}.plan-card h3{font-size:25px}.plan-card .price{font-size:36px}.plan-card .price small{display:block;margin-left:0}.plan-card ul{display:block}.plan-card li{font-size:15px}.plan-card .button{width:100%;font-size:14px}.billing-toggle{width:100%}.billing-toggle button{font-size:13px;flex:1}.order-row{font-size:14px;gap:12px}.source-page p{font-size:15px}.source-link strong{font-size:16px}.source-link small{font-size:13px}.toast{left:50%;font-size:13px;padding:13px 18px;max-width:91vw;width:max-content}dialog{padding:29px 23px;border-radius:18px}dialog h2{font-size:28px}dialog p,dialog li{font-size:15px}.teacher-mode main{padding:18px}.teacher-mode .lab-heading h1{font-size:29px}.teacher-mode .lab-side{grid-template-columns:1fr}.teacher-mode .canvas-wrap{aspect-ratio:1.4}.teacher-mode .scene-status{font-size:12px}.teacher-mode .scene-controls .button{font-size:12px}.teacher-mode .metric strong{font-size:26px}}
@media(max-width:370px){main{padding-left:16px;padding-right:16px}.hero-copy{padding-left:23px;padding-right:23px}.hero h2{font-size:39px}.hero p{font-size:14px}.welcome-row h1{font-size:27px}.card-body h3{font-size:20px}.steps{gap:2px;padding:12px 7px}.step{font-size:10px;gap:3px}.step i{width:21px;height:21px}.scene-controls .button{padding:8px;font-size:11px}.speed-select{font-size:10px}.lab-side .segmented button{font-size:11px;padding:8px}.metric strong{font-size:23px}}
/* Home learning mode picker: explain the control before asking people to use it. */
.crumb-link{font:inherit;color:#778473;background:none;border:0;padding:0;cursor:pointer}.crumb-link:hover{color:#294536;text-decoration:underline}
.learning-picker{display:grid;grid-template-columns:minmax(210px,.8fr) minmax(330px,1.2fr);align-items:center;gap:8px 18px;padding:12px 14px;background:#f1f4e9;border:1.5px solid #d1dcc5;border-radius:13px;min-width:min(100%,530px)}.learning-picker-label{display:grid;gap:3px}.learning-picker-label strong{font-size:14px;color:#34543d}.learning-picker-label span{font-size:11px;line-height:1.5;color:#718267}.learning-picker .segmented{width:100%}.learning-picker-current{grid-column:1/-1;margin:0;padding:5px 8px;border-top:1px dashed #c6d4b9;color:#5d745b;font-size:12px;line-height:1.7}
@media(max-width:760px){.learning-picker{grid-template-columns:1fr;gap:9px;padding:12px}.learning-picker .segmented{width:100%}.learning-picker-current{grid-column:auto;font-size:12px}}

.learning-picker{display:none!important}