:root{--wine:#693849;--wine-dark:#402732;--pink:#f0dfe2;--ink:#352d30;--muted:#736b6e;--bg:#f8f7f5;--line:#e6e0df;--white:#fff;--green:#336b58;--amber:#946824;--radius:18px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}button,input,select,textarea{font:inherit}button,a,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.48}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #b18151;outline-offset:3px}a{color:var(--wine)}h1,h2,h3,p{margin-top:0}h1{font-size:30px;letter-spacing:.02em;line-height:1.35;margin-bottom:10px}h2{font-size:21px;line-height:1.5;margin-bottom:14px}h3{font-size:17px;line-height:1.5;margin-bottom:8px}p{margin-bottom:14px}.muted{color:var(--muted)}.small{font-size:14px}.eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase}.layout{display:grid;grid-template-columns:224px 1fr;min-height:100vh}.sidebar{padding:32px 22px;background:var(--wine-dark);color:#fff;display:flex;flex-direction:column;position:fixed;inset:0 auto 0 0;width:224px}.brand{display:flex;gap:12px;align-items:center;margin-bottom:44px}.brand-mark{display:grid;place-items:center;width:43px;height:43px;border:1px solid #bca1ab;border-radius:14px;font-family:serif;font-size:25px}.brand-name{font-family:serif;font-size:25px;letter-spacing:.08em}.brand-sub{font-size:11px;color:#c5afb8;letter-spacing:.2em}.nav{display:grid;gap:8px}.nav 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.15s}.lesson-card:hover{border-color:#b998a5;transform:translateY(-2px)}.lesson-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:17px}.lesson-number{font-size:22px;color:#a98d98;font-family:Georgia,serif}.lesson-card h3{font-size:16px}.lesson-card p{color:var(--muted);font-size:13px;margin:5px 0}.lesson-bottom{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted);margin-top:16px}.progress-figure{display:flex;align-items:center;gap:17px;margin:22px 0}.progress-ring{width:90px;height:90px;flex-shrink:0;position:relative;display:grid;place-items:center}.progress-ring svg{position:absolute;inset:0;width:100%;height:100%;transform:rotate(-90deg)}.progress-ring b{font-size:22px;font-family:Georgia,serif}.big-number{font-size:29px;font-family:Georgia,serif}.metrics{display:grid;grid-template-columns:1fr 1fr;gap:16px;border-top:1px solid var(--line);padding-top:20px}.metrics p{font-size:12px;margin:2px 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h2{font-size:25px}}@media(max-width:940px){.home-grid,.content-layout{grid-template-columns:1fr}.rail{display:grid;grid-template-columns:1fr 1fr}.demo-note{grid-column:1/-1}.scenario-grid{grid-template-columns:1fr}.scenario-card{min-height:210px}.sticky{position:static}.detail-grid{grid-template-columns:1fr}.stat-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:650px){.layout{display:block}.sidebar{position:fixed;inset:auto 0 0;width:100%;height:75px;padding:6px 10px;background:#fff;border-top:1px solid var(--line);z-index:10}.sidebar .brand,.sidebar-foot{display:none}.nav{display:flex;justify-content:space-around;gap:0}.nav button{flex-direction:column;gap:2px;padding:6px 9px;font-size:12px;min-width:65px;color:var(--muted)}.nav button.active{background:#f3e9ed;color:var(--wine)}.nav button:hover{background:#f3e9ed}.nav-icon{font-size:18px}.workspace{display:block}.topbar{height:auto;min-height:75px;padding:14px 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legend{font-size:16px}.actions .button{flex:1}.learner-select{max-width:130px;font-size:12px}.record-line{flex-wrap:wrap}.table-wrap{margin:0 -10px}#toast{bottom:92px}.bubble{max-width:95%}table{min-width:650px}.topbar:has(.learner-select) .mobile-brand{font-size:20px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.table-hint{display:none}@media(max-width:650px){.table-hint{display:block}}
.login{max-width:950px;margin:5vh auto;padding:25px}.login h1{font-size:34px}.account-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:25px 0}.account{text-align:left;padding:24px;background:white;border:1px solid var(--line);border-radius:16px;color:var(--ink)}.account strong{font-size:19px;display:block}.account small{display:block;color:var(--muted);font-size:14px;margin-top:10px}.loading{padding:40px}.module-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.module-grid .panel{display:flex;flex-direction:column;gap:10px}.module-grid .button{margin-top:auto}.module-grid .panel p{font-size:14px}.module-grid .locked{opacity:.62}.brand-mark{flex-shrink:0}.workspace .main{max-width:1400px}.notice{padding:14px 18px;background:#f3e9ed;color:var(--wine);border-radius:10px;margin-bottom:22px;font-size:14px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px}.wide{grid-column:1/-1}.toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:20px}.toolbar h1{flex:1}.task-line{padding:18px 0;border-bottom:1px solid var(--line)}.task-line p{font-size:14px}.task-line .button{margin:8px 5px 0 0}.task-line:last-child{border-bottom:0}.field code{font-size:12px}textarea.code{min-height:350px;font:14px/1.5 ui-monospace,monospace}.order-input{max-width:250px}.exam-question{padding:22px 0;border-bottom:1px solid var(--line)}.exam-question legend{font-weight:600;font-size:17px}.exam-question fieldset{border:0;padding:0}.exam-question .option{margin-top:10px}.result-question{padding:18px 0;border-bottom:1px solid var(--line)}.row-list{display:grid;gap:14px}.row-card{padding:20px;border:1px solid var(--line);border-radius:12px;background:white}.row-head{display:flex;justify-content:space-between;gap:14px;align-items:center}.row-card p{font-size:14px}.course-cards p{font-size:16px}.course-cards li{margin-bottom:12px}.scrollbox{overflow:auto;max-width:100%}pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:13px}details summary{cursor:pointer;color:var(--wine)}.hint{font-size:14px;color:var(--muted)}.status-note{font-size:14px;color:var(--green)}.subnav{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}.nav button{font-size:14px}.nav{gap:4px}.sidebar{padding-top:24px}.brand{margin-bottom:28px}.small-strong{font-size:14px}.media-line audio{max-width:100%;margin-top:10px}.dashboard-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:24px}.dashboard-metrics strong{font-size:30px;display:block}.sidebar-foot{font-size:12px}.form-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.file{max-width:100%}@media(max-width:1050px){.module-grid{grid-template-columns:1fr 1fr}.two-col{grid-template-columns:1fr}.wide{grid-column:auto}}@media(max-width:650px){.account-grid,.module-grid{grid-template-columns:1fr}.login{margin:20px auto;padding:20px}.main{padding:23px 16px 105px}.panel{padding:20px}.topbar{padding:12px 16px;min-height:72px;height:auto}.profile-sub,.breadcrumb{display:none}.top-actions{gap:8px}.brand-sub{display:none}.sidebar{height:80px;padding:7px}.nav{overflow-x:auto;justify-content:flex-start}.nav button{min-width:75px;padding:7px 10px;white-space:nowrap}.sidebar-foot{display:none}.dashboard-metrics{gap:8px}.dashboard-metrics .panel{padding:12px}.dashboard-metrics strong{font-size:25px}.dashboard-metrics p{font-size:12px}.row-head{align-items:flex-start;flex-wrap:wrap}.profile-name{font-size:13px}.button{min-height:44px}.toolbar{align-items:flex-start}.toolbar h1{flex-basis:100%}.topbar strong{font-size:18px}.subnav .button{font-size:14px;padding:8px 12px}.panel{overflow-wrap:anywhere}}
@media(max-width:650px){.nav button{flex:1}}

.comparison-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:18px 0}.comparison-item{padding:14px;border:1px solid var(--line);border-radius:10px}.comparison-item p{margin:7px 0}.comparison-item strong{font-size:14px}@media(max-width:1050px){.comparison-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:400px){.comparison-grid{grid-template-columns:1fr}}
.video-section{margin:20px 0}.video-lesson{border-top:1px solid var(--line);padding:18px 0}.video-lesson:first-of-type{border-top:0}.video-lesson video,.submission-media video{display:block;width:100%;max-width:720px;max-height:420px;background:#141414;border-radius:12px;margin:12px 0}.submission-media video{max-height:300px}.video-lesson .button{margin-top:8px}@media(max-width:650px){.video-section{margin:14px 0}.video-lesson video,.submission-media video{max-height:270px;border-radius:8px}}

.ai-report { overflow-wrap: anywhere; }
.ai-report li { margin: .6rem 0; }
.ai-feedback { margin-top: 1.25rem; }
.ai-advice-form { margin-top: 1.25rem; border-top: 1px solid var(--line, #e8dfdf); padding-top: 1rem; }
.voice-controls { display: grid; gap: 12px; margin: 16px 0; }
.voice-controls input[type=file] { max-width: 100%; }
.voice-controls [hidden] { display: none; }
.bubble > button { display: block; margin-top: 12px; }

.sheet-gallery{display:flex;flex-wrap:wrap;gap:12px;margin:16px 0}.exam-sheet{width:180px;max-width:100%;height:180px;object-fit:contain;border:1px solid #e8dce0;border-radius:8px}.panel+.panel,#course-editor>section{margin-top:20px}#course-editor fieldset{margin:16px 0}.field input[type=file]{max-width:100%}.field textarea{max-width:100%}

.task-recipient-list{max-height:340px;overflow:auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:8px}#task-publisher-form fieldset{min-width:0}#task-publisher-form input[type="datetime-local"]{min-width:0;max-width:100%;box-sizing:border-box}