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solid #eee}.image-work svg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.annotations-legend{font-size:12px;color:#a32e2e}.photo-input{display:flex;align-items:center;gap:12px;font-size:12px;color:#888;margin:15px 0}dialog{width:min(760px,94vw);max-height:88vh;overflow:auto;border:1px solid #ddd;padding:30px;border-radius:8px;background:#fff}dialog::backdrop{background:#0006}.modal-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:22px}.modal-head h2{font-size:23px;margin:0}.modal-head button{padding:4px 10px;border:0;font-size:22px}.modal-footer{border-top:1px solid #eee;margin-top:22px;padding-top:17px;font-size:12px;color:#999}#toast{position:fixed;bottom:26px;left:calc(50% + 110px);max-width:85vw;background:#222;color:#fff;padding:12px 21px;border-radius:5px;font-size:13px;z-index:100;transform:translate(-50%,10px);opacity:0;pointer-events:none;transition:.15s}#toast.show{opacity:1;transform:translate(-50%,0)}.hide{display:none!important}#print-area{display:none}.line-chart{display:flex;gap:9px;align-items:flex-end;height:110px;margin-top:20px}.line-chart .bar{flex:1;background:#ddd;min-height:3px;position:relative}.line-chart .bar span{position:absolute;bottom:-24px;left:0;width:100%;text-align:center;font-size:9px;color:#aaa}.float-note{font-size:11px;color:#aaa;line-height:1.9;margin:13px 0 0}.chips{display:flex;gap:7px;flex-wrap:wrap}.chips span{background:#f0f0f0;padding:4px 9px;border-radius:3px;font-size:11px;color:#888}.print-list{white-space:pre-wrap}.busy{opacity:.6;pointer-events:none}.progress-track{height:4px;background:#eee;margin-top:10px}.progress-track span{display:block;height:4px;background:#444}.semester-note{font-size:11px;color:#aaa;margin-top:12px}.analysis-fields{display:grid;grid-template-columns:1fr 1fr;gap:13px}.analysis-fields textarea{min-height:70px}.authoring .en{color:#222}.mobile-shade{display:none}.social-card{width:100%;max-width:400px;background:white;border:1px solid #ddd;padding:30px}.social-card .en{font-size:20px}
@media(max-width:1200px){.sidebar{width:210px;padding-left:16px;padding-right:16px}.shell{margin-left:210px}.topbar{padding:0 28px}main{padding:32px 28px 50px}.hero{gap:25px}.hero h1{font-size:35px}.dark-note{padding:25px}.top-actions #sync-state{display:none}.grid3{gap:12px}.migration-grid{grid-template-columns:1fr 1fr}.lab-layout{gap:16px}.preview{padding:20px}.preview .en{font-size:18px}footer{margin:0 28px}}
@media(max-width:950px){.sidebar{width:180px;padding:24px 10px 15px}.shell{margin-left:180px}.brand{gap:8px;font-size:18px}.brand-symbol{width:32px;height:35px;font-size:19px}nav a{font-size:12px;padding:8px 10px;gap:7px}.search-short{min-width:130px;font-size:10px!important}.hero{grid-template-columns:1fr}.dark-note{display:none}.grid3{grid-template-columns:repeat(2,1fr)}.grid2,.lab-layout{grid-template-columns:1fr}.lab-right{position:static}.split{grid-template-columns:180px minmax(0,1fr);gap:20px}.stat{padding:0 14px}.stat strong{font-size:27px}.migration-grid{grid-template-columns:1fr}.topbar{padding:0 24px}main{padding:30px 24px 45px}.heading h1{font-size:28px}.heading p{font-size:12px}.toolbar select{max-width:180px}}
@media(max-width:680px){body{font-size:15px}.sidebar{transform:translateX(-100%);width:245px;transition:transform .18s;box-shadow:8px 0 30px #0001;inset:0 auto 0 0;padding:25px 19px}.sidebar.open{transform:translateX(0)}.sidebar .brand{font-size:21px}nav a{font-size:14px;padding:10px 12px;gap:10px}.shell{margin:0}.topbar{height:72px;padding:0 17px;position:sticky;top:0;background:#fff;z-index:20;gap:10px}.icon-button{display:block;border:0;padding:5px;background:none;font-size:19px}.breadcrumb{flex:1}.breadcrumb small{font-size:8px}.breadcrumb strong{font-size:12px}.top-actions .search-short{display:none}.top-actions button{font-size:11px;padding:7px 10px}.top-actions{gap:5px}.top-actions #sync-state{display:none}main{padding:26px 18px 40px}.hero{margin-top:0}.hero h1{font-size:34px}.hero p{font-size:13px}.eyebrow{font-size:9px}.stats{grid-template-columns:repeat(2,1fr);gap:20px 0;padding:20px 0}.stat{padding:0 18px!important;border:0!important}.stat:nth-child(odd){padding-left:0!important}.stat:nth-child(even){border-left:1px solid var(--line)!important}.stat strong{font-size:30px}.stat small{font-size:11px}.heading{gap:12px;flex-wrap:wrap}.heading h1{font-size:27px}.heading p{font-size:12px}.heading .actions{padding:0}.heading .actions button{font-size:11px}.grid3{gap:10px}.type-card{padding:15px;min-height:190px}.type-card h3{font-size:17px}.type-card p{font-size:11px}.type-card .number{font-size:18px}.split{grid-template-columns:1fr;gap:20px}.course-nav{position:static;display:flex;overflow-x:auto;scrollbar-width:thin}.course-nav button{white-space:nowrap;border:1px solid #eee;font-size:11px;padding:9px}.course-nav .badge{display:none}.course-section h3{font-size:19px}.course-section p{font-size:14px}.example{padding:13px 16px}.example .en{font-size:18px}.preview{padding:21px}.preview .en{font-size:19px}.panel-head{padding:14px 17px}.panel-body{padding:19px}.edit-block{padding:18px}.edit-block textarea{min-height:104px;font-size:18px}.edit-block textarea.translation{font-size:12px;min-height:45px}.toolbar input[type=search]{min-width:100%}.toolbar select{max-width:none;flex:1;min-width:130px}.toolbar{gap:8px}.form-grid{grid-template-columns:1fr}.analysis-fields{grid-template-columns:1fr}.info-grid{gap:7px}.info-cell{font-size:11px}.exercise-text{font-size:20px}.timer{font-size:39px}.exam-head{gap:14px}.plan-day{gap:12px}.plan-day .day{min-width:35px;font-size:21px}.plan-day button{font-size:10px;padding:6px}.comparison{font-size:12px;display:block;overflow-x:auto}.comparison td.en{font-size:16px;min-width:210px}footer{margin:0 18px;flex-direction:column;gap:3px;font-size:9px}.row{gap:10px}.row .actions button{font-size:10px;padding:6px}.migration-entry{padding:20px}dialog{padding:22px}.modal-head h2{font-size:21px}#toast{left:50%;font-size:12px;width:max-content;max-width:90vw}.quiz{padding:17px}.quiz label{font-size:13px}.actions button{min-height:36px}.sidebar.open+.shell{filter:brightness(.9)}}
@media(max-width:680px){.hero h1{font-size:30px;line-height:1.45}.dark-note{display:block;padding:22px}.hero{gap:25px}.hero>div{min-width:0}}
@page{size:A4;margin:18mm 18mm 18mm 18mm}@media print{body{font-size:12pt;color:#000;background:#fff}.sidebar,.shell,dialog,#toast{display:none!important}#print-area{display:block!important;color:#000;font-family:"Microsoft YaHei",sans-serif;line-height:1.7}#print-area h1{font-size:21pt;font-weight:bold;letter-spacing:0;margin-bottom:16pt}#print-area h2{font-size:15pt;margin:18pt 0 10pt;break-after:avoid}#print-area h3{font-size:13pt;break-after:avoid}#print-area .en{font-family:Georgia,serif;font-size:13pt;line-height:1.8}#print-area .zh{font-size:11pt;color:#333}#print-area p{margin:0 0 9pt;orphans:3;widows:3}#print-area table{width:100%;border-collapse:collapse;font-size:10.5pt}#print-area td,#print-area th{border:1px solid #bbb;padding:7pt;vertical-align:top}#print-area th{background:#eee}#print-area button{display:none}#print-area .print-page{break-before:page}#print-area .print-page:first-child{break-before:auto}}

.payment-codes img{display:block;max-width:100%;width:300px;height:auto;margin:12px auto}.qr-mini{max-width:120px;max-height:180px;object-fit:contain;margin-bottom:18px}