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@media(max-width:1180px){:root{--side:195px}.sidebar{padding-left:12px;padding-right:12px}.binding>span{display:none}.recording-panel{padding:23px 23px 16px}.recording-heading>div{display:block}.language-chip{display:inline-block;margin-top:10px}.recording-help{line-height:1.7}.record-dock{gap:12px;padding-left:13px;padding-right:13px}.record-dock .primary,.record-dock .outlined{padding:9px 12px}.waveform i:nth-child(n+9){display:none}.study-tabs{gap:20px;padding-left:20px;padding-right:20px}.auto-label{font-size:8px}.study-tabs>button{font-size:12px}.learning-grid{grid-template-columns:minmax(0,1fr) minmax(330px,.9fr)}.topbar{padding:0 20px}.topbar-right{gap:12px}.save-status{display:none}.lesson-bar{padding:0 22px}.personal-notes{font-size:13px}}
@media(max-width:900px){.sidebar{width:220px;box-shadow:8px 0 30px #3d4f8a15}main{margin-left:0}.sidebar-hidden .sidebar{transform:translateX(-100%)}body:not(.sidebar-hidden) main::after{content:'';position:fixed;inset:65px 0 0 220px;background:#34416d25;z-index:7}.topbar{position:relative;z-index:9}.learning-grid{grid-template-columns:minmax(0,1fr) minmax(310px,.9fr)}.binding label{display:none}.lesson-bar{gap:10px}.binding select{max-width:190px}.recording-heading h1{font-size:17px}.recording-help{font-size:9px}.record-dock{gap:10px}.record-dock .outlined{font-size:10px;padding:8px 10px}.record-dock .primary{font-size:10px}.recording-panel{padding-left:20px;padding-right:20px}.waveform i:nth-child(n+7){display:none}}
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[hidden]{display:none!important}

/* 课堂选择与课件操作归入右侧；录音结束后在控制条展示导出。 */
.learning-grid{height:calc(100dvh - 65px)}body.has-notice .learning-grid{height:calc(100dvh - 107px)}
.courseware-area{display:flex;flex-direction:column;flex-shrink:0;max-height:49%;min-height:54px;border-bottom:1px solid var(--line)}
.courseware-tools{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:54px;padding:10px 23px;flex-shrink:0}
.class-picker{display:flex;align-items:center;gap:10px;min-width:0;flex:1}.class-picker label{font-size:11px;color:#929fbb;white-space:nowrap}.class-picker select{border:1px solid #e3e8f4;background:#fff;border-radius:5px;padding:7px 26px 7px 10px;font-size:11px;color:#7481a3;min-width:125px;width:min(260px,100%);max-width:100%}.class-picker option[value="__new_course__"]{color:#4143af}
.courseware-tools .outlined{flex-shrink:0}.courseware-area .ppt-region{max-height:none;min-height:160px;flex:1;overflow:hidden;border-bottom:0;padding-top:4px}
.record-dock{max-width:580px;gap:12px}.record-dock .primary,.record-dock .outlined{padding:9px 12px}.record-dock #export{background:#f6f7ff;border-color:#e2e6f8;color:#696eb1}
@media(min-width:1600px){.courseware-tools{padding-left:30px;padding-right:30px}}
@media(max-width:1180px){.courseware-tools{padding-left:20px;padding-right:20px;gap:10px}.class-picker{gap:7px}.class-picker select{width:100%;min-width:100px}.courseware-tools .small{padding:7px 9px;font-size:10px}.record-dock.has-export{gap:9px}.record-dock.has-export .outlined,.record-dock.has-export .primary{font-size:10px;padding:9px 10px}}
@media(max-width:650px){.learning-grid,body.has-notice .learning-grid{height:auto}.courseware-area{max-height:none;min-height:52px}.courseware-tools{padding:10px 18px;min-height:52px}.courseware-area .ppt-region{height:260px;min-height:0;flex:none}.class-picker select{max-width:220px;font-size:10px}.record-dock.has-export{flex-wrap:wrap;max-width:100%;gap:8px;padding:9px 10px}.record-dock.has-export .waveform,.record-dock.has-export .dock-divider{display:none}.record-dock.has-export .outlined,.record-dock.has-export .primary{padding:8px 10px;font-size:10px}}

/* 录音笔记名称：标题即笔记名称，可直接编辑 */
.recording-heading>div:first-child{flex:1 1 auto;min-width:0}
.lesson-title{font:inherit;font-size:17px;font-weight:600;color:#3f4c6f;border:0;border-bottom:1px dashed #e6ebf7;background:transparent;padding:1px 2px 2px;margin:0;flex:1 1 auto;width:auto;min-width:0;max-width:420px;border-radius:4px;outline:none;line-height:1.35;text-overflow:ellipsis}
.lesson-title:hover{border-bottom-color:#ccd4e8}
.lesson-title:focus{border-bottom-color:#4143af;background:#f6f7ff}
.lesson-title::placeholder{color:#8b98b8;font-weight:550}

/* 资料库：目录名已由顶栏给出，个人/公开目录不再重复标题；资料数量归入工具栏 */
.library-toolbar-end{margin-left:auto;display:flex;align-items:center;gap:12px}
.library-toolbar-end button{margin-left:0}
.library-toolbar .library-count{padding-top:0;white-space:nowrap}
@media(max-width:1180px){.recording-heading>div:first-child{display:flex;flex-wrap:wrap;row-gap:6px;align-items:center}.lesson-title{flex:1 0 100%;width:100%;max-width:none}}
@media(max-width:650px){.library-toolbar-end{margin-left:0;width:100%;justify-content:space-between}.library-toolbar .library-count{font-size:10px}}

/* 手机拍照：笔记区的二维码入口、照片缩略图与预览 */
.note-tools{display:flex;align-items:center;gap:12px}
.note-tools #noteStatus{font-size:9px;color:#b0b8cb}
#phoneUpload{color:#7074b7;font-size:10px;border:1px solid #e5e9f8;border-radius:20px;padding:5px 11px;background:#f8f9ff}
#phoneUpload:hover{border-color:#c3cbf0;color:#4143af}
.note-photos{flex:0 0 auto;max-height:34%;overflow:auto;border-top:1px dashed #eaeff8;padding:10px 26px 14px}
.note-photos-head{display:flex;align-items:center;justify-content:space-between;font-size:9px;color:#a4aec6;margin-bottom:9px}
.photo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(66px,1fr));gap:7px}
.note-photo{aspect-ratio:1;border:1px solid #e6ebf7;border-radius:6px;overflow:hidden;padding:0;background:#f5f7fd;display:block}
.note-photo img{width:100%;height:100%;object-fit:cover;display:block}
.note-photo i{display:block;width:100%;height:100%;background:linear-gradient(100deg,#f2f5fc,#e9eefb,#f2f5fc);background-size:200% 100%;animation:shimmer 1.2s linear infinite}
.note-photo:hover{border-color:#b9c2ea;box-shadow:0 2px 8px #4143af1f}
.file-icon.photo{background:#fdf3ef;color:#d8a68c}
@keyframes shimmer{to{background-position:-200% 0}}
.capture-dialog{width:376px}
.capture-box h2{font-size:19px}
.capture-qr{width:216px;height:216px;margin:0 auto 16px;display:grid;place-items:center;background:#fff;border:1px solid #eef1f9;border-radius:10px;padding:8px;color:#a9b3c9;font-size:11px}
.capture-qr svg{width:100%;height:100%;display:block}
.capture-url{display:flex;align-items:center;gap:8px;padding:8px 10px;background:#f6f8fd;border-radius:6px}
.capture-url code{flex:1;min-width:0;font-size:10px;color:#7c88a8;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.capture-url .small{flex-shrink:0;min-height:28px;padding:5px 9px;font-size:10px}
#captureState{font-size:10px;color:#a6b0c7;line-height:1.8;margin:12px 0 0}
.capture-dialog .dialog-actions{align-items:center;justify-content:space-between;margin-top:18px}
.photo-dialog{width:min(720px,92vw);padding:14px}
.photo-box img{display:block;width:100%;max-height:70vh;object-fit:contain;border-radius:8px;background:#f4f6fc}
.photo-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 4px 2px;font-size:10px;color:#a3adc4}
.photo-actions>div{display:flex;align-items:center;gap:14px}
@media(max-width:650px){.note-photos{padding-left:19px;padding-right:19px;max-height:none}.photo-grid{grid-template-columns:repeat(auto-fill,minmax(58px,1fr))}.capture-dialog{width:92vw}}

/* 笔记时间戳：记录起始/更新时间，照片按拍摄时间排序并标出时刻 */
.note-hint{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.note-tools{gap:10px}
.note-stamp{font-size:9px;color:#a3aec8;background:#f6f8fd;border:1px solid #eef1f9;border-radius:10px;padding:3px 8px;white-space:nowrap;font-variant-numeric:tabular-nums}
.note-stamp:empty{display:none}
.note-photo{position:relative}
.note-photo-time{position:absolute;right:3px;bottom:3px;font-size:8px;line-height:1;padding:2px 4px;border-radius:4px;background:#0f1226b8;color:#eef1ff;font-variant-numeric:tabular-nums;letter-spacing:.2px}
@media(max-width:900px){.note-hint{display:none}}
@media(max-width:650px){.note-stamp{display:none}}

/* 菜单信息架构：录音学习 / 笔记 / 资料 / 课堂 */
.side-hint{margin-top:auto;padding:16px 8px 0;font-size:9px;color:#a3adc6;line-height:1.9;letter-spacing:.2px}
.sidebar .sidebar-bottom{margin-top:14px}
.library-tabs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:22px 0 6px}
.library-tabs>button{font-size:12px;color:#8d98b8;padding:8px 14px;border:1px solid #e7ecf6;border-radius:20px;background:#fff}
.library-tabs>button:hover{border-color:#cfd6ee;color:#5b668c}
.library-tabs>button.active{color:#4143af;border-color:#c9cff1;background:#f2f4ff;font-weight:600}
.library-course-select{margin-left:auto;padding:8px 12px;border:1px solid #e3e8f5;border-radius:6px;font-size:11px;color:#7481a3;background:#fff;max-width:230px}
.library-heading-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
/* 笔记列表 */
.notes-list{background:#fff;border:1px solid #e7ecf6;border-radius:8px;overflow:hidden}
.note-row{display:flex;align-items:center;gap:15px;padding:18px 22px;border-bottom:1px solid #f0f3f8}
.note-row:last-child{border-bottom:0}
.note-row.current{background:#fafbff;box-shadow:inset 3px 0 0 #7c81d9}
.note-row-main{flex:1;min-width:0}
.note-row-title{font-size:13px;color:#5b688a;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.note-row-meta{font-size:9px;color:#adb7cc;margin-top:7px;line-height:1.6}
.note-row-actions{display:flex;gap:16px;flex-shrink:0}
.note-row-actions button{font-size:10px;color:#8c9ac3;white-space:nowrap}
.note-row-actions button:hover{color:#4143af}
/* 课堂卡片 */
.course-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:14px;margin-top:24px}
.course-card{border:1px solid #e7ecf6;border-radius:10px;background:#fff;padding:20px 20px 16px;display:flex;flex-direction:column;gap:9px}
.course-card-head{display:flex;align-items:center;gap:10px;min-width:0}
.course-card-head h3{margin:0;font-size:15px;font-weight:600;color:#4d5a7c;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.course-card-head .chip{flex-shrink:0;margin-left:auto;font-size:9px;color:#8d93c6;background:#f1f3fd;border-radius:10px;padding:3px 8px}
.course-card-meta{margin:0;font-size:10px;color:#a6b0c7}
.course-card-actions{display:flex;gap:16px;margin-top:8px}
.course-card-actions button{font-size:10px;color:#7781ad}
.course-card-actions button:hover{color:#4143af}
.course-empty{grid-column:1/-1;text-align:center;padding:64px 20px;color:#a9b4ce;font-size:13px;line-height:2;border:1px dashed #e3e9f6;border-radius:10px;background:#fcfdff}
.course-empty span{display:block;font-size:32px;color:#c4cde5;margin-bottom:12px}
@media(max-width:900px){.side-hint{display:none}}
@media(max-width:650px){.library-heading{align-items:flex-start}.library-heading-actions{flex-direction:column;align-items:stretch;gap:8px}.library-tabs{gap:6px}.library-tabs>button{padding:7px 11px;font-size:11px}.library-course-select{margin-left:0;width:100%;max-width:none}.note-row{padding:14px;gap:10px}.note-row-title{font-size:12px}.note-row-actions{gap:12px}.course-cards{grid-template-columns:1fr}}