:root{--ink:#192e3b;--muted:#667781;--brand:#1c605b;--accent:#cbb78a;--line:#dfe5e4;--paper:#fff;--bg:#f4f5f1;--soft:#f3f7f5;--nav:#172f3b;--warn:#9a511b;--radius:14px;color-scheme:light;font-family:"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;font-size:15px;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:1px solid var(--line);background:white;border-radius:8px;padding:10px 15px;color:var(--ink);min-height:42px;font-weight:600}button:hover{border-color:#9dada9;background:var(--soft)}button:disabled{opacity:.45;cursor:default}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}button:focus-visible,a:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid #91b9b2;outline-offset:3px}input:focus,textarea:focus,select:focus{outline:3px solid 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0;border:1px solid #dbe4dc;border-radius:7px;background:#fff}summary{cursor:pointer;font-size:12px;color:var(--brand);padding:13px 15px;line-height:1.7;font-weight:600}details .body{padding:0 16px 14px;font-size:12px}.lesson-bottom{display:flex;gap:14px;justify-content:space-between;align-items:center;margin:28px 0;padding:21px;background:#e7eee5;border-radius:10px;font-size:12px}.lesson-bottom a{padding:8px 0;max-width:45%}.lesson-bottom a:last-child{text-align:right}.philosophy-result{margin:18px 0;padding:20px;background:#edf3ee;border-radius:9px}.score-row{display:grid;grid-template-columns:115px 1fr 60px;gap:12px;align-items:center;margin:13px 0;font-size:12px}.score-row .progress-track{margin:0}.lab-frame{width:100%;border:1px solid var(--line);border-radius:12px;background:white;min-height:900px;display:block}.lesson-lab .lesson-header{padding-bottom:20px}dialog{max-width:620px;width:calc(100% - 36px);max-height:85vh;overflow:auto;border:1px solid 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@media(min-width:1600px){.home-hero{gap:70px}.home-hero h1{font-size:48px}.course-card{padding:25px}.home-hero{margin-bottom:40px}.journey-visual{max-width:430px;width:100%;justify-self:end}}
@media(max-width:1200px){.sidebar{width:224px;padding-left:12px;padding-right:12px}.main-shell{margin-left:224px}.brand{font-size:15px;gap:9px}.brand small{font-size:7px}.topbar{padding:0 26px}main{padding:30px 26px}.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-layout{display:block}.toc{position:static;display:flex;flex-wrap:wrap;gap:9px;border:0;padding:0 0 20px;grid-row:1}.toc h2,.toc .progress-track,.toc .progress-caption{display:none}.toc a{margin:0;padding:6px 10px;background:#e8eee5;border-radius:5px;font-size:10px}.lesson-layout{display:flex;flex-direction:column}.lesson-body{width:100%;order:1}.toc{width:100%;order:0}.journey-visual{padding:23px}.journey-visual small{display:none}.profile-strip{gap:16px;padding:20px}.profile-stat{padding-left:16px}.profile-stat>span{display:block;margin:4px 0 0}.app-footer{padding:23px 26px}}
@media(max-width:900px){.sidebar{transform:translateX(-100%);transition:transform .2s;width:258px}.sidebar.open{transform:translateX(0)}.main-shell{margin-left:0}#menu{display:inline-block}.topbar{height:65px;padding:0 20px}.overlay{display:block;position:fixed;inset:0;background:#10273366;border:0;border-radius:0;z-index:35}.home-hero{gap:22px}.home-hero h1{font-size:34px}.home-hero p{font-size:12px}.journey-visual{padding:22px}.journey-visual li{font-size:12px}.home-hero{grid-template-columns:1.35fr 1fr}#toast{left:50%}.app-footer{padding:22px}main{padding:27px 22px}#saveStatus{max-width:120px;font-size:10px}.lesson-header h1{font-size:29px}}
@media(max-width:600px){.topbar{padding:0 12px;gap:8px}.topbar-left{gap:6px}#breadcrumb{font-size:11px;max-width:165px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#breadcrumb i{margin:0 6px}.topbar-actions{gap:8px}#saveStatus{display:none}#exportButton{font-size:11px;padding:8px 10px}#exportButton span{margin-left:4px}main{padding:22px 16px}.home-hero{display:block;margin-top:6px;margin-bottom:23px}.home-hero h1{font-size:34px;margin:12px 0}.home-hero p{font-size:12px}.journey-visual{margin-top:25px;padding:17px 18px}.journey-label{margin-bottom:15px}.journey-visual ol{grid-template-columns:repeat(4,1fr);gap:5px}.journey-visual li{display:flex;flex-direction:column;gap:7px;text-align:center;font-size:10px;white-space:nowrap}.journey-visual li:before{height:0;top:16px;left:calc(50% + 17px);width:calc(100% - 30px);border:0;border-top:1px solid #bbcbbb}.journey-visual b{width:31px;height:31px}.journey-visual small{display:none}.hero-actions{gap:12px}.hero-actions small{font-size:10px}.profile-strip{grid-template-columns:1fr 1fr;gap:18px;padding:19px 20px;margin-bottom:26px}.student-field{grid-column:1/-1}.profile-stat{padding-left:0;border:0}.profile-stat strong{font-size:24px}.profile-stat>span{display:inline-block;margin-left:6px;font-size:10px}.section-heading{align-items:flex-start;flex-direction:column;gap:15px}.section-heading h2{font-size:17px}.search-box{width:100%}.filters{gap:4px}.filters button{padding:8px 9px;font-size:11px;min-height:40px}.phase-heading{margin:23px 0 13px}.course-grid{gap:12px;grid-template-columns:1fr}.course-card{padding:20px;min-height:165px}.course-card h4{margin:15px 0 7px}.course-card p{margin-bottom:13px}.home-note{display:block;padding:17px}.home-note strong{display:block;margin-bottom:5px}.app-footer{font-size:9px;padding:22px 16px;flex-direction:column;gap:7px}.lesson-header h1{font-size:25px}.lesson-header p{font-size:12px}.lesson-meta{gap:10px}.lesson-actions{gap:7px;margin-top:18px}.lesson-actions button{padding:9px 11px;font-size:11px}.lesson-body section.card{padding:20px 17px;scroll-margin-top:85px}.lesson-body h2.sec{font-size:17px}.lesson-body p,.lesson-body li{font-size:13px}.task{padding:15px 13px}.steps{grid-template-columns:repeat(2,minmax(0,1fr))}.task .tag{margin-bottom:5px}.lesson-body textarea{font-size:16px;min-height:110px}.lesson-body input[type=text],.lesson-body select{font-size:16px}.lesson-body td textarea{font-size:14px}.checklist{padding:12px}.lesson-bottom{padding:15px}.lesson-bottom a{font-size:11px}.score-row{grid-template-columns:90px 1fr 45px;font-size:11px}.lab-frame{border-radius:8px}dialog{padding:22px 20px}.dialog-heading h2{font-size:19px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
body[data-saved=false] #saveStatus{display:block;color:#9b3b23;font-weight:600}
@media(max-width:600px){body[data-saved=false] #saveStatus{position:fixed;top:65px;left:0;right:0;max-width:none;padding:8px 16px;background:#fff0df;border-bottom:1px solid #e9b68c;font-size:12px}}
@media print{body{background:#fff}.sidebar,.topbar,.app-footer,#toast,dialog,.lesson-header,.toc,.lesson-bottom,.home-hero,.lesson-actions{display:none!important}.main-shell{margin:0}.app-shell{display:none!important}.print-sheet{display:block!important;font-size:11pt;line-height:1.7;color:#111}.print-sheet h1{font-size:22pt}.print-sheet h2{font-size:17pt;border-bottom:1px solid #aaa;padding-bottom:10px;break-before:page}.print-sheet h3{font-size:12pt;margin-bottom:4px}.print-sheet p{white-space:pre-wrap;overflow-wrap:anywhere}.print-sheet .answer{border-left:2px solid #ccc;padding-left:12px;margin:0 0 16px}.print-sheet .print-meta{font-size:10pt;color:#555}.print-sheet section{break-inside:auto}.print-sheet h3{break-after:avoid}@page{size:A4;margin:17mm}}