:root{--font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;--text-page-title: 30px;--text-page-subtitle: 14px;--text-card-title: 22px;--text-course-title: 32px;--text-section-title: 18px;--text-small-title: 15px;--text-body: 14px;--text-caption: 12px;--text-button: 15px;--text-status-number: 18px;--text-status-label: 13px;--text-nav: 15px;--teacher-text-page-title: 32px;--teacher-text-card-title: 20px;--teacher-text-section-title: 18px;--teacher-text-small-title: 15px;--teacher-text-body: 14px;--teacher-text-supporting: 12px;--teacher-text-button: 14px;--teacher-text-status-number: 18px;--teacher-text-status-label: 12px;--teacher-text-nav: 12px;--weight-regular: 400;--weight-medium: 500;--weight-semibold: 600;--weight-bold: 700;--leading-title: 1.25;--leading-body: 1.55;--leading-caption: 1.45;--leading-button: 1;--xcx-text-main: var(--text-primary);--xcx-text-secondary: var(--text-secondary)}:root{--app-viewport-height: 100vh;color-scheme:light;--design-width: 1280;--design-height: 800;--app-ui-scale: 1;--device-aspect-ratio: 16 / 10;--app-ratio-landscape: 16 / 10;--app-ratio-photo: 4 / 3;--app-ratio-card: 3 / 2;--app-ratio-square: 1 / 1;--device-max-width: min(100vw, 160vh );--device-max-height: min(100vh, 62.5vw );--viewport-gutter: clamp(8px, 1.5vw, 20px);--safe-area-inset-x: 20px;--safe-area-inset-y: 14px;--shell-gap: 12px;--app-safe-inline-padding: var(--safe-area-inset-x);--app-safe-block-padding: var(--safe-area-inset-y);--app-bottom-safe-gap: max(10px, env(safe-area-inset-bottom, 0px));--app-action-bar-height: clamp(56px, 8vh, 84px);--app-action-bar-safe-space: calc(var(--app-action-bar-height) + var(--app-bottom-safe-gap));--app-card-grid-min: clamp(168px, 24vw, 280px);--surface-page: #fbfaf5;--surface-frame: #fffdf9;--surface-muted: #f4f3ed;--surface-panel: #ffffff;--border-subtle: #dedccf;--text-primary: #2c312a;--text-secondary: #6b7168;--accent: #4f7b4f;--accent-warm: #f0b557;--accent-soft: #edf4e7;--accent-berry: #8f6b4a;--shadow-frame: 0 18px 60px rgb(76 83 67 / 14%)}@supports (height: 100dvh){:root{--app-viewport-height: 100dvh}}*{box-sizing:border-box}html,body,#root{width:100%;height:100%;min-height:var(--app-viewport-height);min-width:0;margin:0;overflow:hidden}body{min-height:var(--app-viewport-height);font-family:var(--font-sans);color:var(--text-primary);background:var(--surface-page)}button,input,textarea,select{font:inherit}.app-root{display:grid;width:100%;height:var(--app-viewport-height);min-height:var(--app-viewport-height);min-width:0;min-height:0;place-items:center;padding:var(--viewport-gutter);overflow:hidden}.device-frame{position:relative;width:min(calc(100vw - var(--viewport-gutter) * 2),calc((100vh - var(--viewport-gutter) * 2) * 16 / 9));max-width:var(--device-max-width);max-height:var(--device-max-height);aspect-ratio:var(--device-aspect-ratio);overflow:hidden;border:1px solid rgb(121 126 111 / 14%);border-radius:8px;background:var(--surface-frame);box-shadow:var(--shadow-frame)}.device-frame__viewport{width:100%;height:100%;min-width:0;min-height:0;overflow:hidden}.safe-area-container{width:100%;height:100%;min-width:0;min-height:0;padding:var(--app-safe-block-padding) var(--app-safe-inline-padding);overflow:hidden}.student-shell{display:grid;grid-template-rows:min-content minmax(0,1fr) min-content;width:100%;height:100%;min-width:0;min-height:0;gap:var(--shell-gap);overflow:hidden}.layout-test-page{display:contents}.layout-test-header,.layout-test-footer{min-width:0}.software-preview-header{display:flex;align-items:flex-start;justify-content:space-between;gap:clamp(12px,2vw,22px)}.layout-test-kicker{margin:0 0 4px;color:var(--accent);font-size:clamp(11px,1.1vw,14px);font-weight:700;letter-spacing:0;text-transform:uppercase}.layout-test-header h1{margin:0;overflow-wrap:anywhere;font-size:clamp(20px,3.2vw,38px);line-height:1.12;letter-spacing:0}.software-lesson-meta{display:grid;flex:0 1 190px;min-width:0;gap:3px;padding:10px 12px;border:1px solid rgb(79 123 79 / 18%);border-radius:8px;background:var(--accent-soft);text-align:right}.software-lesson-meta strong,.software-lesson-meta span{min-width:0;overflow-wrap:anywhere}.software-lesson-meta strong{color:var(--text-primary);font-size:clamp(14px,1.45vw,18px);line-height:1.2}.software-lesson-meta span{color:var(--text-secondary);font-size:clamp(11px,1vw,13px);line-height:1.25}.layout-test-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));min-width:0;min-height:0;gap:clamp(8px,1.4vw,16px);padding-right:2px;overflow-x:hidden;overflow-y:auto;scrollbar-gutter:stable}.layout-test-panel{display:grid;align-content:start;justify-items:start;gap:8px;min-width:0;min-height:clamp(74px,12vw,130px);padding:clamp(10px,1.8vw,18px);overflow:hidden;border:1px solid var(--border-subtle);border-radius:8px;background:var(--surface-panel);transition:background-color var(--motion-duration-base) var(--motion-ease-standard),box-shadow var(--motion-duration-base) var(--motion-ease-standard),transform var(--motion-duration-base) var(--motion-ease-standard),opacity var(--motion-duration-fast) var(--motion-ease-standard)}.layout-test-panel:hover{transform:translateY(var(--motion-shift-card))}.student-shell--motion-stage{animation:motionStageEnter var(--motion-duration-base) var(--motion-ease-standard)}.layout-test-panel span{max-width:100%;overflow-wrap:anywhere;color:var(--text-primary);font-weight:700;font-size:clamp(13px,1.5vw,18px);line-height:1.25;text-align:left}.layout-test-panel small{max-width:100%;overflow:hidden;color:var(--text-secondary);font-size:clamp(11px,1.05vw,13px);line-height:1.35;overflow-wrap:anywhere}.layout-test-footer{display:flex;min-height:0;align-items:center;justify-content:space-between;gap:12px;padding-top:2px;color:var(--text-secondary);font-size:clamp(12px,1.2vw,15px);line-height:1.3}.layout-test-footer span{min-width:0;overflow-wrap:anywhere}.software-preview-footer span:first-child{color:var(--accent-berry);font-weight:700}.student-task-main{display:grid;grid-template-rows:min-content minmax(0,1fr);min-width:0;min-height:0;gap:12px;overflow:hidden}.student-task-hero{display:grid;min-width:0;gap:6px;padding:14px 16px;overflow:hidden;border:1px solid rgb(79 123 79 / 18%);border-radius:8px;background:#f6f8f0}.student-task-hero span,.student-task-hero strong,.student-task-hero p{min-width:0;margin:0;overflow-wrap:anywhere;letter-spacing:0}.student-task-hero 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var(--app-safe-inline-padding)}.u-safe-bottom-pad{padding-bottom:var(--app-action-bar-safe-space)}.u-bottom-action-safe-gap{padding-bottom:var(--app-bottom-safe-gap)}.u-responsive-card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,var(--app-card-grid-min)),1fr));min-width:0;min-height:0;gap:var(--shell-gap);align-content:start}.u-clamp-1,.u-clamp-2,.u-clamp-3{min-width:0;overflow:hidden}.u-clamp-1{white-space:nowrap;text-overflow:ellipsis}.u-clamp-2,.u-clamp-3{display:-webkit-box;-webkit-box-orient:vertical;text-overflow:ellipsis}.u-clamp-2{-webkit-line-clamp:2}.u-clamp-3{-webkit-line-clamp:3}@media(max-width:720px){:root{--safe-area-inset-x: clamp(12px, 4vw, 28px);--safe-area-inset-y: clamp(10px, 3vw, 20px)}.app-root{place-items:stretch;padding:0;overflow-x:hidden;overflow-y:auto}.software-preview-header{display:grid}.software-lesson-meta{text-align:left}.layout-test-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:480px){:root{--viewport-gutter: 0px;--safe-area-inset-x: max(12px, env(safe-area-inset-left, 0px));--safe-area-inset-y: max(10px, env(safe-area-inset-top, 0px))}html,body,#root{height:auto;min-height:var(--app-viewport-height);overflow-x:hidden;overflow-y:auto}.app-root{display:block;height:auto;min-height:var(--app-viewport-height);overflow:visible}.device-frame{width:100%;max-width:none;max-height:none;min-height:var(--app-viewport-height);aspect-ratio:auto;border:0;border-radius:0;box-shadow:none}.device-frame__viewport,.safe-area-container{height:auto;min-height:var(--app-viewport-height);overflow:visible}.layout-test-grid{grid-template-columns:minmax(0,1fr)}}.teacher-device-frame{position:relative;container-type:size;width:calc(var(--app-canvas-width, var(--design-width)) * 1px);height:calc(var(--app-canvas-height, var(--design-height)) * 1px);flex:0 0 auto;transform:scale(var(--app-ui-scale));transform-origin:center center;margin:calc(var(--app-canvas-height, var(--design-height)) * (var(--app-ui-scale) - 1) / 2 * 1px) calc(var(--app-canvas-width, var(--design-width)) * (var(--app-ui-scale) - 1) / 2 * 1px);overflow:hidden;border:1px solid rgb(49 74 62 / 12%);border-radius:8px;background:var(--teacher-frame)}.teacher-device-frame__viewport,.teacher-safe-area-stage,.teacher-safe-area{width:100%;height:100%;min-width:0;min-height:0;overflow:hidden}.teacher-safe-area{overflow-x:hidden;overflow-y:auto;overscroll-behavior:contain}.teacher-device-frame__viewport,.teacher-safe-area-stage{position:relative}.teacher-safe-area{padding:var(--app-safe-block-padding) var(--app-safe-inline-padding)}@media(max-width:959px){.teacher-device-frame{border:0;border-radius:0;background:transparent;box-shadow:none}}.viewport-warning{position:fixed;z-index:9999;top:0;right:0;left:0;display:flex;gap:12px;align-items:flex-start;padding:10px 14px;border-bottom:1px solid #d98b3a;background:#fff4e0;box-shadow:0 6px 18px #281e0a2e;color:#6b4514;font-size:14px;line-height:1.5}.viewport-warning__body{display:flex;flex:1 1 auto;flex-wrap:wrap;gap:4px 12px;min-width:0}.viewport-warning__body strong{color:#a4501a}.viewport-warning__hint{font-weight:700}.viewport-warning__close{flex:0 0 auto;padding:2px 8px;border:0;border-radius:6px;background:transparent;color:#a4501a;cursor:pointer;font-size:15px}.viewport-warning__close:hover{background:#f3e0c4}:root{--teacher-frame: #f8f6f1;--teacher-surface: #f4f1eb;--teacher-card: #ffffff;--teacher-card-soft: #edf1ea;--teacher-card-warm: #fbfaf7;--teacher-card-danger: #f7ece8;--teacher-border: #d8d2c8;--teacher-border-strong: #cbc5ba;--teacher-text: #2f342f;--teacher-muted: #6f746d;--teacher-green: #6e8b74;--teacher-green-soft: #edf1ea;--teacher-orange: #b79669;--teacher-orange-soft: #f5efe6;--teacher-red: #b36f61;--teacher-red-soft: #f7ece8;--teacher-shadow: 0 10px 28px rgb(81 76 67 / 6%)}.teacher-card{display:grid;grid-template-rows:min-content min-content 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p{margin:0;color:var(--teacher-muted);font-size:var(--teacher-text-body);line-height:var(--leading-body);overflow-wrap:anywhere}.teacher-clamp-1,.teacher-clamp-2,.teacher-clamp-3,.student-clamp-3{display:-webkit-box;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis}.teacher-clamp-1{-webkit-line-clamp:1}.teacher-clamp-2{-webkit-line-clamp:2}.teacher-clamp-3,.student-clamp-3{-webkit-line-clamp:3}.teacher-button{display:inline-flex;min-height:38px;min-width:92px;max-width:100%;align-items:center;justify-content:center;padding:0 14px;border:1px solid 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p{max-width:520px;margin:0;line-height:1.7}.live-class__list{display:flex;flex-direction:column;gap:8px;min-height:0;overflow-y:auto}.teacher-page.lesson-prep{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:min-content minmax(0,1.05fr) minmax(0,.95fr) min-content;gap:10px;height:100%;min-height:0}.lesson-prep__grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:10px;min-width:0;min-height:0}.lesson-prep__grid--bottom{grid-template-columns:minmax(0,1fr)}.lesson-prep-current__main{min-width:0}.lesson-prep-current__main p{margin:2px 0 0;overflow:hidden;font-size:12px;color:var(--text-secondary);text-overflow:ellipsis;white-space:nowrap}.lesson-prep-current__duration{display:flex;flex:0 0 auto;align-items:center;gap:6px;font-size:12.5px;color:var(--text-secondary)}.lesson-prep-current__duration input{width:68px;padding:5px 8px;border:1px solid var(--border-subtle);border-radius:8px;font:inherit;font-size:14px;text-align:center}.lesson-prep-current__duration input:focus{border-color:var(--accent);outline:none}.lesson-prep-current__duration em{font-style:normal}.lesson-prep-current__go{flex:0 0 auto;padding:6px 14px;border:0;border-radius:999px;background:var(--accent);color:#fff;cursor:pointer;font-size:12.5px}.launch-checklist{display:grid;grid-template-rows:min-content minmax(0,1fr);gap:8px;min-height:0;padding:14px}.launch-checklist header strong{display:block;font-size:15px}.launch-checklist header span{font-size:12px;color:var(--text-secondary)}.launch-checklist__list{display:grid;align-content:start;gap:6px;margin:0;padding:0;min-height:0;overflow-y:auto;list-style:none}.launch-checklist__list label{display:flex;align-items:flex-start;gap:8px;padding:7px 9px;border:1px solid var(--border-subtle);border-radius:10px;cursor:pointer;font-size:12.5px;line-height:1.5}.launch-checklist__list label.is-checked{border-color:var(--accent);background:var(--accent-soft)}.launch-checklist__list input{margin-top:2px;accent-color:var(--accent)}.launch-checklist__tag{flex:0 0 auto;padding:1px 7px;border-radius:999px;background:var(--surface-muted);color:var(--text-secondary);font-size:11px}.launch-checklist__tag--安全{background:#fdeceb;color:#a03325}.launch-checklist__text{min-width:0}.launch-checklist__empty{margin:0;font-size:12.5px;line-height:1.6;color:var(--text-secondary)}.lesson-prep__footer{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px;border:1px solid var(--border-subtle);border-radius:12px;background:var(--surface-panel);font-size:12.5px;color:var(--text-secondary)}.lesson-prep__footer-warn{color:#a4501a}.lesson-prep__finish{flex:0 0 auto;padding:10px 24px;border:0;border-radius:10px;background:var(--accent);color:#fff;cursor:pointer;font-size:14px;font-weight:700}.lesson-prep__finish:disabled{cursor:default;opacity:.55}.dashboard-course-ingredients{margin:0;font-size:12.5px;line-height:1.6;color:var(--text-secondary)}.dashboard-course-prep{justify-self:start;padding:8px 18px;border:0;border-radius:10px;background:var(--accent);color:#fff;cursor:pointer;font-size:13.5px;font-weight:700}.course-wizard__duration{display:flex;align-items:center;gap:6px}.course-wizard__duration input{width:66px;padding:3px 7px;border:1px solid var(--border-subtle);border-radius:6px;font:inherit;font-size:12.5px;text-align:center}.course-wizard__duration input:focus{border-color:var(--accent);outline:none}.lesson-prep__footer{padding-right:150px}.dashboard-course-block--gallery{min-height:0}.dashboard-course-photo-frame{flex:0 1 auto;min-height:0}.dashboard-course-photo-copy{flex:0 0 auto}