@font-face{font-family:StudioLatin;src:url('/assets/fonts/lato/lato-regular.woff') format('woff');font-weight:400;font-display:swap}
@font-face{font-family:StudioLatin;src:url('/assets/fonts/lato/lato-bold.woff') format('woff');font-weight:700;font-display:swap}
:root{--ink:#233c43;--muted:#667d84;--line:#dae5e7;--soft:#f2f6f7;--teal:#008b8e;--deep:#006c70;--mint:#e8f6f4;--blue:#387bc5;--amber:#b17823}
*{box-sizing:border-box;letter-spacing:0}body{margin:0;min-width:320px;background:#f3f6f7;color:var(--ink);font:16px/1.6 StudioLatin,'Microsoft YaHei UI','Microsoft YaHei',sans-serif}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer}button:disabled{opacity:.4;cursor:default}a{color:inherit;text-decoration:none}:focus-visible{outline:3px solid #83cfce;outline-offset:3px}[hidden]{display:none!important}h1,h2,h3,p{margin:0}h1{font-size:30px;line-height:1.3}h2{font-size:19px;line-height:1.4}h3{font-size:18px}small{font-size:13px}button i{pointer-events:none}.topbar{display:flex;align-items:stretch;gap:36px;min-height:66px;padding:0 32px;background:#fff;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:23px;font-weight:700}.brand>span{width:34px;height:36px;display:grid;place-items:center;background:var(--deep);color:#fff;border-radius:4px;font-size:20px}.main-nav{display:flex;align-items:stretch;gap:24px}.main-nav a{display:flex;align-items:center;border-bottom:3px solid transparent;padding:3px 2px 0;color:var(--muted);white-space:nowrap}.main-nav a.active{color:var(--deep);border-color:var(--teal);font-weight:700}.account{margin-left:auto;display:flex;align-items:center;gap:9px;white-space:nowrap}.account i{font-size:24px;color:#7c979a}.account small{margin-left:5px;color:var(--muted)}
.button,.icon-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:8px 15px;border:1px solid #c6d6da;border-radius:5px;background:#fff;font-size:15px;font-weight:700;white-space:nowrap;transition:background .15s,box-shadow .15s}.button:hover,.icon-button:hover{background:#eef5f5}.primary{border-color:var(--teal);background:var(--teal);color:white}.primary:hover{background:var(--deep)}.icon-button{width:40px;min-width:40px;padding:0}.text-button{display:inline-flex;align-items:center;gap:6px;border:0;background:none;color:var(--deep);padding:4px 0;font-size:15px}.danger{color:#b94e44}.eyebrow{font-size:14px;color:var(--muted)}.badge{display:inline-flex;align-items:center;gap:5px;background:#ecf3f4;border:1px solid #d6e4e7;border-radius:4px;color:#526f77;font-size:13px;padding:2px 8px;white-space:nowrap}.badge.ready{background:#e7f5ed;color:#32805c;border-color:#c8e5d5}.badge.draft{background:#fff5e6;color:#966523;border-color:#ecd9b6}.library{max-width:1560px;margin:auto;padding:32px 40px 50px}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}.page-heading h1{margin-top:5px}.library-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);margin-bottom:26px}.filters{display:flex;gap:25px}.filters button{background:none;border:0;border-bottom:3px solid transparent;padding:15px 0;font-size:16px;color:var(--muted)}.filters button.active{color:var(--deep);border-bottom-color:var(--teal);font-weight:700}.filters span{margin-left:7px;font-size:14px}.search{display:flex;align-items:center;gap:10px;background:white;border:1px solid var(--line);padding:0 12px;border-radius:4px;max-width:300px}.search i{color:var(--muted)}.search input{border:0;min-width:0;width:100%;height:40px;background:none}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;align-items:start}.course-card{min-width:0;background:white;border:1px solid #cfdfe2;border-radius:7px;overflow:hidden;transition:box-shadow .2s,transform .2s}.course-card:hover{box-shadow:0 8px 25px #23444f0c;transform:translateY(-2px)}.course-cover{padding:23px 24px 20px;background:#e9f3f4;border-bottom:1px solid #dce8e9;position:relative}.course-cover:before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--teal)}.course-topline{display:flex;justify-content:space-between;align-items:center;gap:8px;color:#527980;font-size:14px}.course-cover h2{margin:17px 0 18px;font-size:25px;line-height:1.4;overflow-wrap:anywhere}.course-visual{display:flex;align-items:center;height:48px}.visual-node{display:grid;place-items:center;width:44px;height:44px;background:white;border:1px solid #c7dedf;border-radius:6px;color:var(--teal);font-size:20px}.visual-node:nth-of-type(3){color:var(--blue)}.visual-node:nth-of-type(5){color:var(--amber)}.connector{width:27px;height:1px;background:#9bc7ca}.course-body{padding:21px 24px}.course-description{min-height:54px;color:#5a747b;font-size:15px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.course-details{display:flex;gap:20px;margin:17px 0;color:#5b747b;font-size:14px}.course-details i{margin-right:6px;color:#789398}.module-tags{display:flex;gap:7px;flex-wrap:wrap;margin:18px 0}.module-tags span{font-size:13px;color:#5b7178;background:#f1f5f6;padding:3px 8px;border-radius:3px}.course-actions{display:flex;gap:8px;margin-top:22px;align-items:center}.course-actions>.primary{flex:1}.course-updated{font-size:13px;color:#8a9ba0;margin-top:15px}.library-foot{display:flex;justify-content:space-between;gap:20px;margin-top:32px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}.library-foot i{margin-right:5px}.empty{text-align:center;padding:70px 20px;color:var(--muted)}.empty>i{font-size:32px;margin-bottom:12px}.empty h2{margin:5px 0 20px}
.editor-heading{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:18px 28px;background:white;border-bottom:1px solid var(--line)}.editor-identity{display:flex;align-items:center;gap:16px;min-width:0}.editor-identity h1{font-size:24px;overflow-wrap:anywhere}.editor-breadcrumb{font-size:13px;color:var(--muted)}.editor-actions{display:flex;gap:8px;flex-shrink:0}.editor-tabs{display:flex;align-items:center;gap:28px;padding:0 32px;background:white;border-bottom:1px solid var(--line)}.editor-tabs button{border:0;border-bottom:3px solid transparent;background:none;padding:13px 0;color:var(--muted);font-size:16px}.editor-tabs button.active{color:var(--deep);border-color:var(--teal);font-weight:700}.editor-tabs>span{margin-left:auto;color:var(--muted);font-size:14px}.studio-layout{display:grid;grid-template-columns:230px minmax(350px,1fr) 365px;min-height:calc(100dvh - 205px);align-items:stretch}.module-palette{padding:23px 18px;background:white;border-right:1px solid var(--line)}.module-palette header{display:flex;align-items:center;justify-content:space-between;gap:5px;margin-bottom:22px}.module-palette h2{font-size:16px}.module-palette header .badge{font-size:11px;padding:1px 5px}.palette-category{font-size:13px;color:#799095;margin:19px 8px 8px}.module-button{display:flex;width:100%;align-items:center;gap:12px;border:1px solid transparent;background:none;text-align:left;padding:11px 9px;border-radius:5px;margin-bottom:3px;font-size:15px}.module-button:hover{background:#eaf5f5;border-color:#c7e4e3}.module-button>i:first-child{width:29px;height:29px;display:grid;place-items:center;background:#edf3f5;color:#507881;border-radius:4px;font-size:16px}.module-button>i:last-child{margin-left:auto;font-size:11px;color:#7c969c}.module-button[data-kind='brainstorm']>i:first-child{background:#eaf3ff;color:var(--blue)}.module-button[data-kind='peer']>i:first-child{background:#fff2df;color:var(--amber)}.sequence{padding:23px 26px 50px;min-width:0}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:20px}.section-heading h2{font-size:17px}.section-heading>span,.section-heading h2 span{color:var(--muted);font-size:14px;font-weight:400}.stage-list{margin:0;padding:0;list-style:none;display:grid;gap:13px}.stage-row{position:relative;display:flex;border:1px solid #d2dfe3;border-radius:6px;background:white;min-width:0;transition:border-color .16s,box-shadow .16s;animation:arrive .18s ease-out}.stage-row.selected{border-color:var(--teal);box-shadow:inset 3px 0 0 var(--teal),0 3px 10px #006c700a}.stage-pick{flex:1;min-width:0;display:flex;align-items:flex-start;gap:14px;padding:17px;border:0;background:transparent;text-align:left;border-radius:5px}.stage-number{display:grid;place-items:center;flex:0 0 30px;height:30px;border-radius:5px;background:#edf3f4;color:#779398;font-size:14px}.selected .stage-number{background:var(--mint);color:var(--deep)}.stage-copy{min-width:0;flex:1}.stage-copy h3{font-size:17px;line-height:1.5;overflow-wrap:anywhere}.stage-copy p{color:#71848a;font-size:14px;margin:5px 0;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}.stage-meta{display:flex;align-items:center;gap:11px;flex-wrap:wrap;font-size:12px;color:#758b92;margin-top:9px}.stage-meta i{margin-right:4px}.stage-meta .ai-tag{color:var(--blue)}.stage-order{display:flex;flex-direction:column;align-self:center;gap:2px;margin-right:10px}.stage-order .icon-button{width:28px;min-width:28px;min-height:27px;border:0;font-size:12px;background:transparent;color:#668088}.add-stage{width:100%;padding:14px;border:1px dashed #a8c6cc;border-radius:5px;background:transparent;color:var(--deep);margin-top:15px;font-size:15px}.add-stage:hover{background:#e9f4f4}.blank-sequence{text-align:center;padding:60px 20px;background:#fff;border:1px dashed #bfd3d8;border-radius:5px;color:var(--muted)}.blank-sequence i{font-size:30px;color:#84a9b0;display:block;margin-bottom:15px}.blank-sequence h3{font-size:17px;margin-bottom:8px}
.inspector{border-left:1px solid var(--line);background:white;padding:22px 24px;min-width:0}.inspector-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.inspector-heading .tools{display:flex;gap:5px}.inspector-heading .icon-button{width:32px;min-width:32px;min-height:32px;border:0}.inspector .field{margin-bottom:16px}.inspector-group{border-top:1px solid var(--line);padding-top:21px;margin-top:21px}.inspector-group h3{font-size:15px;margin-bottom:13px}.field{display:flex;flex-direction:column;gap:7px;font-size:14px;color:#526c74;font-weight:700}.field input,.field textarea,.field select{width:100%;min-width:0;border:1px solid #c5d5da;border-radius:4px;background:white;padding:9px 11px;min-height:42px;font-size:16px;font-weight:400;color:#293f47}.field textarea{resize:vertical;line-height:1.65}.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--teal)}.field-pair{display:grid;grid-template-columns:1fr 1fr;gap:13px}.checkline{display:flex;gap:9px;align-items:flex-start;font-size:15px;color:#4b666e;margin:12px 0;cursor:pointer}.checkline input{accent-color:var(--teal);width:17px;height:17px;margin:4px 0;flex:none}.switchline{display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:15px;margin:14px 0;cursor:pointer}.switchline input{appearance:none;position:relative;width:34px;height:20px;border:0;border-radius:20px;background:#c4d1d5;flex:none;margin:0;transition:background .2s;cursor:pointer}.switchline input:before{content:'';position:absolute;width:14px;height:14px;left:3px;top:3px;background:white;border-radius:50%;transition:transform .2s}.switchline input:checked{background:var(--teal)}.switchline input:checked:before{transform:translateX(14px)}.inspector-empty{text-align:center;padding:40px 0;color:var(--muted)}.inspector-empty i{font-size:28px;margin-bottom:12px}.subtle{color:var(--muted);font-size:13px;font-weight:400}.settings-panel,.reference-panel{max-width:1100px;margin:auto;padding:32px 40px 60px}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}.settings-grid .wide{grid-column:1/-1}.settings-grid fieldset{margin:0;border:0;padding:0}.settings-grid legend{font-size:14px;font-weight:700;color:#526c74;margin-bottom:8px}.grade-options{display:flex;gap:24px;align-items:center}.settings-section{padding:28px 0;border-top:1px solid var(--line);margin-top:28px}.settings-section h2{margin-bottom:18px}.reference-panel .field{margin:20px 0}.reference-header{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:25px}.reference-source{padding:18px 0;border-bottom:1px solid var(--line);display:flex;gap:18px;align-items:flex-start}.reference-source>i{font-size:23px;color:var(--teal);padding-top:5px}.reference-source h3{font-size:17px;margin-bottom:5px}.reference-source p{font-size:15px;color:var(--muted)}.reference-actions{display:flex;gap:20px;align-items:center;margin-top:25px}.reference-chat{border-top:1px solid var(--line);padding-top:25px;margin-top:30px}.reference-chat h2{margin-bottom:12px}.chat-compose{display:flex;gap:10px;align-items:flex-end}.chat-compose .field{flex:1;margin:0}.chat-log{padding:15px 0}.chat-entry{padding:16px 0;border-bottom:1px solid var(--line);font-size:15px}.chat-entry p{margin:7px 0}.chat-entry small{color:var(--muted)}
.dialog{padding:0;border:1px solid #cddce0;border-radius:8px;max-height:90dvh;background:white;color:var(--ink);box-shadow:0 24px 80px #172f3940;overflow:auto}.dialog::backdrop{background:#162e3c66;backdrop-filter:blur(2px)}.compact{width:min(550px,calc(100% - 32px))}.dialog-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;padding:22px 26px;border-bottom:1px solid var(--line)}.dialog-heading h2{font-size:23px}.dialog-content{padding:24px 26px}.dialog-content .field{margin-bottom:20px}.dialog-footer{display:flex;justify-content:flex-end;align-items:center;gap:10px;padding:18px 26px;background:#f6f9f9;border-top:1px solid var(--line)}.dialog-footer small{margin-right:auto;color:var(--muted)}.template-options{margin:10px 0 0;padding:0;border:0}.template-options legend{font-size:14px;color:#526c74;font-weight:700;margin-bottom:10px}.template-options label{display:flex;gap:12px;border:1px solid var(--line);border-radius:5px;margin-top:9px;padding:14px;cursor:pointer}.template-options label:has(:checked){border-color:var(--teal);background:#eff9f8}.template-options input{accent-color:var(--teal);margin:5px 0}.template-options strong,.template-options small{display:block}.template-options small{color:var(--muted);margin-top:3px}.preview-dialog{width:min(1060px,calc(100% - 36px))}.preview-layout{display:grid;grid-template-columns:250px 1fr;min-height:420px}.preview-layout nav{padding:16px;border-right:1px solid var(--line);background:#f5f8f9}.preview-layout nav button{width:100%;border:0;border-radius:4px;background:none;text-align:left;padding:10px 12px;font-size:15px;margin-bottom:5px}.preview-layout nav button.active{background:#dff1ef;color:var(--deep);font-weight:700}.preview-layout section{padding:30px;min-width:0}.preview-instruction{white-space:pre-wrap;margin:22px 0;color:#425f69;line-height:1.8}.preview-controls{border-top:1px solid var(--line);padding-top:20px}.preview-controls textarea{width:100%;height:120px;border:1px solid var(--line);border-radius:4px;padding:12px;font:inherit;margin:10px 0}.preview-info{display:flex;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:14px}.preview-feature{border-left:3px solid var(--blue);padding:10px 15px;background:#f0f6ff;font-size:15px;margin:20px 0}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:200;background:#24464b;color:white;padding:12px 22px;border-radius:6px;box-shadow:0 8px 30px #153e4830;max-width:calc(100% - 32px);font-size:15px}
.grade-options{flex-wrap:wrap}.grade-options .checkline{white-space:nowrap}
@keyframes arrive{from{opacity:.5;transform:translateY(5px)}to{opacity:1;transform:none}}
@media(min-width:1700px){.studio-layout{grid-template-columns:260px minmax(400px,1fr) 410px}.sequence{padding-right:50px;padding-left:50px}.inspector{padding:25px 30px}}
@media(max-width:1150px){.topbar{gap:25px;padding:0 22px}.main-nav{gap:16px}.account small{display:none}.studio-layout{grid-template-columns:190px minmax(290px,1fr) 320px}.module-palette{padding:22px 12px}.module-palette header .badge{display:none}.sequence{padding:22px 18px}.inspector{padding:22px 18px}.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.editor-identity{gap:10px}.editor-identity .badge{display:none}.stage-pick{padding:15px 12px;gap:10px}.stage-order{margin-right:5px}}
@media(max-width:900px){.topbar{flex-wrap:wrap;gap:0 20px;padding:10px 20px 0}.brand{font-size:21px}.main-nav{order:3;width:100%;overflow:auto;gap:25px;min-height:46px}.account{margin-left:auto}.studio-layout{grid-template-columns:minmax(0,1fr) 320px}.module-palette{grid-column:1/-1;border-right:0;border-bottom:1px solid var(--line);padding:15px 20px}.module-palette header{margin-bottom:7px}.module-palette #modulePalette{display:flex;overflow:auto;gap:8px}.palette-category{display:none}.module-button{width:auto;flex-shrink:0;gap:7px;padding:8px 10px;border-color:var(--line);margin:0}.module-button>i:last-child{display:none}.module-button>i:first-child{width:22px;height:22px;font-size:14px}.editor-heading{padding:16px 20px;flex-wrap:wrap}.editor-actions{margin-left:auto}.editor-tabs{padding:0 20px;gap:24px}.editor-tabs>span{font-size:12px}.library{padding:26px 24px}.course-body,.course-cover{padding:20px}.course-actions{flex-wrap:wrap}.course-description{min-height:72px}.editor-identity h1{font-size:22px}}
@media(max-width:650px){.library{padding:24px 16px}.page-heading h1{font-size:27px}.page-heading{align-items:flex-end;gap:10px}.page-heading .button{font-size:14px;padding:9px 11px}.library-toolbar{flex-direction:column-reverse;align-items:stretch;gap:6px}.search{max-width:none}.filters{gap:25px}.course-grid{grid-template-columns:1fr}.course-description{min-height:0}.library-foot{flex-direction:column;gap:12px}.editor-heading{padding:14px 16px;gap:14px}.editor-actions{width:100%;justify-content:flex-end}.editor-actions .button{flex:1}.editor-identity{width:100%}.editor-tabs{padding:0 16px;gap:24px;flex-wrap:wrap}.editor-tabs>span{display:none}.studio-layout{display:flex;flex-direction:column;min-height:0}.module-palette{padding:15px 16px}.sequence{padding:20px 16px}.inspector{border-left:0;border-top:1px solid var(--line);padding:24px 20px;scroll-margin-top:15px}.stage-pick{padding:17px 12px}.settings-panel,.reference-panel{padding:25px 20px}.settings-grid{grid-template-columns:1fr}.settings-grid .wide{grid-column:auto}.reference-header{align-items:flex-start;flex-direction:column}.preview-layout{grid-template-columns:1fr}.preview-layout nav{display:flex;overflow:auto;gap:5px;border-right:0;border-bottom:1px solid var(--line)}.preview-layout nav button{white-space:nowrap;width:auto}.preview-layout section{padding:22px}.dialog-heading,.dialog-content{padding:20px}.dialog-footer{padding:15px 20px;flex-wrap:wrap}.dialog-heading h2{font-size:21px}.chat-compose{align-items:stretch;flex-direction:column}.toast{width:max-content;text-align:center}.stage-meta{gap:8px}.grade-options{gap:20px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}