:root{--clay-primary:#ff7f5c;--clay-primary-light:#ffa07a;--clay-primary-dark:#e86a4a;--clay-secondary:#b8a9c9;--clay-secondary-light:#d4c8e0;--clay-secondary-dark:#9a8aad;--clay-accent:#7dd3c0;--clay-accent-light:#a8e6cf;--clay-accent-dark:#5bbfaa;--clay-danger:#f5a5a5;--clay-danger-dark:#e88888;--clay-success:#a8d8a8;--clay-success-dark:#8bc88b;--clay-bg:#fef9f3;--clay-bg-warm:#fff5eb;--clay-bg-cool:#f5f0fa;--clay-surface:#fff;--clay-surface-raised:#fffcf8;--clay-surface-sunken:#f8f4ef;--clay-text:#4a4458;--clay-text-light:#7a7489;--clay-text-muted:#a9a4b4;--clay-border:#0000000f;--clay-border-strong:#0000001a;--clay-shadow-xs:2px 2px 4px #a68c7826,-2px -2px 4px #fffc;--clay-shadow-sm:4px 4px 8px #a68c782e,-4px -4px 8px #ffffffe6;--clay-shadow-md:6px 6px 12px #a68c7833,-6px -6px 12px #fffffff2;--clay-shadow-lg:10px 10px 20px #a68c7838,-10px -10px 20px #fff;--clay-shadow-xl:15px 15px 30px #a68c7840,-15px -15px 30px #fff;--clay-shadow-inset:inset 3px 3px 6px #a68c7826,inset -3px -3px 6px #ffffffb3;--clay-shadow-inset-sm:inset 2px 2px 4px #a68c781f,inset -2px -2px 4px #fff9;--clay-shadow-primary:6px 6px 12px #ff7f5c4d,-4px -4px 8px #ffffffe6;--clay-shadow-accent:6px 6px 12px #7dd3c04d,-4px -4px 8px #ffffffe6;--clay-radius-sm:12px;--clay-radius-md:18px;--clay-radius-lg:24px;--clay-radius-xl:32px;--clay-radius-full:9999px;--clay-transition:all .3s cubic-bezier(.4,0,.2,1);--clay-transition-bounce:all .4s cubic-bezier(.34,1.56,.64,1);--teacher-page-padding-x:12px;--teacher-page-padding-y:12px;--teacher-content-max-width:1200px;--teacher-touch-target:44px;--teacher-baseline-width:1920px;--teacher-baseline-height:1080px;--teacher-baseline-page-padding:28px;--teacher-baseline-page-padding-mobile:16px;--teacher-baseline-panel-gap:24px;--teacher-font-sans:"HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;--teacher-font-display:"Alibaba PuHuiTi 3.0","HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif}.clay-dark,[data-theme=dark]{--clay-bg:#1e1b2e;--clay-bg-warm:#252236;--clay-bg-cool:#1a1826;--clay-surface:#2a2740;--clay-surface-raised:#322f48;--clay-surface-sunken:#1e1b2e;--clay-text:#e8e4f0;--clay-text-light:#b8b4c4;--clay-text-muted:#7a7689;--clay-border:#ffffff14;--clay-border-strong:#ffffff26;--clay-shadow-xs:2px 2px 4px #0006,-2px -2px 4px #3c37504d;--clay-shadow-sm:4px 4px 8px #00000080,-4px -4px 8px #3c375040;--clay-shadow-md:6px 6px 12px #0000008c,-6px -6px 12px #3c375033;--clay-shadow-lg:10px 10px 20px #0009,-10px -10px 20px #3c375026;--clay-shadow-inset:inset 3px 3px 6px #0006,inset -3px -3px 6px #3c375033;--clay-shadow-inset-sm:inset 2px 2px 4px #00000059,inset -2px -2px 4px #3c375026;--clay-shadow-primary:6px 6px 12px #00000080,-4px -4px 8px #ff7f5c26;--clay-shadow-accent:6px 6px 12px #00000080,-4px -4px 8px #7dd3c026}@media (min-width:768px){:root{--teacher-page-padding-x:16px;--teacher-page-padding-y:16px}}@media (min-width:1024px){:root{--teacher-page-padding-x:24px;--teacher-page-padding-y:20px}}@keyframes clay-float{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}@keyframes clay-pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.9;transform:scale(1.02)}}@keyframes clay-wiggle{0%,to{transform:rotate(0)}25%{transform:rotate(-2deg)}75%{transform:rotate(2deg)}}@keyframes clay-bounce-in{0%{opacity:0;transform:scale(.8)}50%{transform:scale(1.05)}to{opacity:1;transform:scale(1)}}@keyframes clay-slide-up{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes clay-slide-down{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes clay-fade-in{0%{opacity:0}to{opacity:1}}@keyframes clay-press{0%{transform:scale(1)}50%{transform:scale(.96)}to{transform:scale(1)}}@keyframes clay-shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes clay-glow{0%,to{box-shadow:var(--clay-shadow-md),0 0 20px #ff7f5c33}50%{box-shadow:var(--clay-shadow-md),0 0 30px #ff7f5c59}}@keyframes clay-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.clay-animate-float{animation:3s ease-in-out infinite clay-float}.clay-animate-pulse{animation:2s ease-in-out infinite clay-pulse}.clay-animate-wiggle{animation:.5s ease-in-out clay-wiggle}.clay-animate-bounce-in{animation:.5s cubic-bezier(.34,1.56,.64,1) forwards clay-bounce-in}.clay-animate-slide-up{animation:.4s ease-out forwards clay-slide-up}.clay-animate-slide-down{animation:.4s ease-out forwards clay-slide-down}.clay-animate-fade-in{animation:.3s ease-out forwards clay-fade-in}.clay-animate-press{animation:.2s ease-out clay-press}.clay-animate-glow{animation:2s ease-in-out infinite clay-glow}.clay-animate-spin{animation:1s linear infinite clay-spin}.clay-delay-1{animation-delay:.1s}.clay-delay-2{animation-delay:.2s}.clay-delay-3{animation-delay:.3s}.clay-delay-4{animation-delay:.4s}.clay-delay-5{animation-delay:.5s}.teacher-page-shell{width:100%;max-width:var(--teacher-content-max-width);padding-inline:var(--teacher-page-padding-x);padding-block:var(--teacher-page-padding-y);margin-inline:auto}.teacher-tap-target{min-width:var(--teacher-touch-target);min-height:var(--teacher-touch-target)}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.clay-card{background:var(--clay-surface);border-radius:var(--clay-radius-lg);box-shadow:var(--clay-shadow-md);border:1px solid var(--clay-border);transition:var(--clay-transition)}.clay-card:hover{box-shadow:var(--clay-shadow-lg);transform:translateY(-2px)}.clay-card-pressed{background:var(--clay-surface-sunken);box-shadow:var(--clay-shadow-inset)}.clay-btn{border-radius:var(--clay-radius-md);background:var(--clay-surface);color:var(--clay-text);box-shadow:var(--clay-shadow-sm);border:1px solid var(--clay-border);cursor:pointer;transition:var(--clay-transition-bounce);justify-content:center;align-items:center;gap:8px;padding:12px 24px;font-size:14px;font-weight:700;display:inline-flex;position:relative;overflow:hidden}.clay-btn:hover{box-shadow:var(--clay-shadow-md);transform:translateY(-2px)}.clay-btn:active{box-shadow:var(--clay-shadow-inset-sm);transform:translateY(0)}.clay-btn-primary{background:linear-gradient(135deg,var(--clay-primary),var(--clay-primary-light));color:#fff;box-shadow:var(--clay-shadow-primary);border:none}.clay-btn-primary:hover{background:linear-gradient(135deg,var(--clay-primary-dark),var(--clay-primary))}.clay-btn-accent{background:linear-gradient(135deg,var(--clay-accent),var(--clay-accent-light));color:var(--clay-text);box-shadow:var(--clay-shadow-accent);border:none}.clay-btn-ghost{box-shadow:none;border:2px solid var(--clay-border-strong);background:0 0}.clay-btn-ghost:hover{background:var(--clay-surface-sunken);box-shadow:var(--clay-shadow-inset-sm)}.clay-input{border-radius:var(--clay-radius-md);background:var(--clay-surface-sunken);width:100%;color:var(--clay-text);box-shadow:var(--clay-shadow-inset-sm);transition:var(--clay-transition);border:2px solid #0000;outline:none;padding:14px 18px;font-size:15px;font-weight:500}.clay-input::placeholder{color:var(--clay-text-muted)}.clay-input:focus{border-color:var(--clay-primary);background:var(--clay-surface);box-shadow:var(--clay-shadow-sm),0 0 0 3px #ff7f5c26}.clay-badge{border-radius:var(--clay-radius-full);background:var(--clay-surface);color:var(--clay-text-light);box-shadow:var(--clay-shadow-xs);align-items:center;gap:4px;padding:6px 12px;font-size:12px;font-weight:700;display:inline-flex}.clay-badge-primary{background:linear-gradient(135deg,var(--clay-primary),var(--clay-primary-light));color:#fff}.clay-badge-success{background:linear-gradient(135deg,var(--clay-success),var(--clay-success-dark));color:var(--clay-text)}.clay-badge-danger{background:linear-gradient(135deg,var(--clay-danger),var(--clay-danger-dark));color:var(--clay-text)}.clay-scrollbar::-webkit-scrollbar{width:8px;height:8px}.clay-scrollbar::-webkit-scrollbar-track{background:var(--clay-surface-sunken);border-radius:var(--clay-radius-full)}.clay-scrollbar::-webkit-scrollbar-thumb{background:linear-gradient(180deg,var(--clay-primary-light),var(--clay-primary));border-radius:var(--clay-radius-full);border:2px solid var(--clay-surface-sunken)}.clay-scrollbar::-webkit-scrollbar-thumb:hover{background:linear-gradient(180deg,var(--clay-primary),var(--clay-primary-dark))}.clay-scrollbar-hide::-webkit-scrollbar{display:none}.clay-scrollbar-hide{-ms-overflow-style:none;scrollbar-width:none}.clay-blob{filter:blur(40px);opacity:.5;pointer-events:none;border-radius:50%;position:absolute}.clay-blob-primary{background:var(--clay-primary)}.clay-blob-secondary{background:var(--clay-secondary)}.clay-blob-accent{background:var(--clay-accent)}.clay-icon-box{border-radius:var(--clay-radius-md);box-shadow:var(--clay-shadow-sm);transition:var(--clay-transition);justify-content:center;align-items:center;display:flex}.clay-icon-box:hover{transform:scale(1.05)}.clay-divider{background:linear-gradient(90deg,transparent,var(--clay-border-strong),transparent);border-radius:var(--clay-radius-full);height:2px;margin:16px 0}.clay-glass{-webkit-backdrop-filter:blur(12px);background:#ffffffb3}.clay-dark 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.teacher-scale-layer{min-height:100dvh;width:100%!important;height:100%!important;transform:none!important}.teacher-scale-shell.teacher-scale-shell--fullbleed .teacher-scale-layer{min-height:0;width:100%!important;height:100%!important;transform:none!important}.teacher-scale-shell.teacher-scale-shell--fullbleed .teacher-shell{width:100%!important;height:100%!important;min-height:0!important}.teacher-scale-shell.teacher-scale-shell--fullbleed .teacher-body{width:100%;height:100%;min-height:0;overflow:hidden}.teacher-scale-layer.is-scaled{width:var(--teacher-baseline-width);height:var(--teacher-baseline-height);will-change:transform;flex:none;min-height:0}.teacher-scale-layer.is-scaled .h-screen,.teacher-scale-layer.is-scaled .h-\[100dvh\]{height:100%!important}.teacher-scale-layer.is-scaled .min-h-screen,.teacher-scale-layer.is-scaled .min-h-\[100dvh\]{min-height:0!important}.teacher-theme{--background:#fff;--foreground:#1f1d23;--color-bg:#fff;--color-bg-sidebar:#f7f7f7;--color-bg-secondary:#f5f5f5;--color-bg-hover:#f0f0f0;--color-primary:#e53e3e;--color-primary-hover:#c53030;--color-text:#1f1d23;--color-text-secondary:#1f1d239e;--color-border:#1f1d231f;color:var(--foreground);font-family:Bitter,Source Han Serif SC,Noto Serif SC,Songti SC,SimSun,serif}.teacher-shell{width:var(--teacher-shell-width,100%);height:var(--teacher-shell-height,100%);min-height:var(--teacher-shell-height,100%);background:radial-gradient(circle at top,#ffffff94,#0000 32%),linear-gradient(#fff7efeb,#fffaf5f5)}.teacher-body{width:100%;height:100%;min-height:100%}html[data-theme=dark] .teacher-theme{--background:#14121a;--foreground:#f4f2f8;--color-bg:#14121a;--color-bg-sidebar:#1c1924;--color-bg-secondary:#ffffff0f;--color-bg-hover:#ffffff1f;--color-primary:#ff6b6b;--color-primary-hover:#ff5252;--color-text:#f4f2f8;--color-text-secondary:#f4f2f89e;--color-border:#f4f2f81f}html[data-theme=dark] .teacher-scale-shell{background:radial-gradient(circle at top,#4c58783d,#0000 40%),#14121a}html[data-theme=dark] .teacher-shell{background:radial-gradient(circle at top,#4c587838,#0000 34%),linear-gradient(#14121afa,#181620fa)}.teacher-teach-shell,html[data-theme=dark] .teacher-teach-shell{background:var(--color-bg)}.teacher-teach-glass{--teach-glass-surface:#ffffffb8;--teach-glass-surface-strong:#ffffffeb;--teach-glass-surface-muted:#f8fafcc7;--teach-glass-border:#e2e8f0cc;--teach-glass-border-strong:#94a3b84d;--teach-glass-shadow:0 26px 60px -36px #0f172a59;--teach-glass-shadow-strong:0 36px 76px -44px #0f172a73}html[data-theme=dark] .teacher-teach-glass{--teach-glass-surface:#0f121cb8;--teach-glass-surface-strong:#0e101ae6;--teach-glass-surface-muted:#121622a6;--teach-glass-border:#94a3b82e;--teach-glass-border-strong:#94a3b842;--teach-glass-shadow:0 28px 64px -40px #0009;--teach-glass-shadow-strong:0 40px 88px -48px #000000b3}.teacher-control-bar{z-index:30;-webkit-backdrop-filter:blur(14px);position:sticky;top:0}.teacher-teach-bar,.teacher-teach-panel{border:1px solid var(--teach-glass-border);background:var(--teach-glass-surface);box-shadow:var(--teach-glass-shadow);-webkit-backdrop-filter:blur(18px)}.teacher-teach-panel .teacher-teach-panel-head{border-bottom:1px solid var(--teach-glass-border);background:var(--teach-glass-surface-muted)}.teacher-teach-panel .teacher-teach-panel-body{border-top:1px solid var(--teach-glass-border)}.teacher-teach-chip{border:1px solid var(--teach-glass-border-strong);background:var(--teach-glass-surface-muted);color:var(--color-text-secondary)}.teacher-teach-chip.strong{color:var(--color-text)}.teacher-teach-button{border:1px solid var(--teach-glass-border);background:var(--teach-glass-surface-strong);color:var(--color-text);transition:transform .2s,box-shadow .2s,background .2s,border-color .2s;box-shadow:0 12px 30px -24px #0f172a73}.teacher-teach-button:hover{border-color:var(--teach-glass-border-strong);box-shadow:0 16px 36px -26px #0f172a80}.teacher-teach-button:active{transform:translateY(1px)}.teacher-teach-button-active{color:#c53030;background:#e53e3e1f;border-color:#e53e3e66}.teacher-teach-select{border:1px solid var(--teach-glass-border);background:var(--teach-glass-surface-strong);color:var(--color-text)}.teacher-teach-stage-surface{background:radial-gradient(circle at top,#94a3b81f,#0000 55%),#ffffffeb}.teacher-teach-section{border:1px solid var(--teach-glass-border);background:var(--teach-glass-surface-muted);border-radius:18px;padding:12px}html[data-theme=dark] .teacher-teach-stage-surface{background:radial-gradient(circle at top,#94a3b833,#0000 55%),#0c0e16e6}@keyframes teacher-slide-in{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes teacher-fade-in{0%{opacity:0}to{opacity:1}}@keyframes teacher-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes teacher-pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.85;transform:scale(1.02)}}.teacher-animate-slide-in{animation:.45s ease-out both teacher-slide-in}.teacher-animate-spin{animation:1s linear infinite teacher-spin}.teacher-animate-pulse{animation:2s ease-in-out infinite teacher-pulse}.teacher-theme{--teacher-font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;--teacher-font-display:"Bitter","Noto Serif SC","Songti SC",serif;--teacher-font-mono:"JetBrains Mono","SFMono-Regular","Menlo",monospace;--teacher-surface:#ffffffeb;--teacher-surface-strong:#fffffffa;--teacher-surface-muted:#f9f9f9f2;--teacher-accent:#e53e3e;--teacher-accent-strong:#c53030;--teacher-info:#2f6feb;--teacher-success:#1f9d5f;--teacher-warning:#f2a93b;--teacher-danger:#e34b4b;--teacher-shadow-soft:0 18px 36px -28px #0f172a47;--teacher-shadow-strong:0 28px 64px -32px #0f172a66}html[data-theme=dark] .teacher-theme{--teacher-surface:#13141ce6;--teacher-surface-strong:#101118f5;--teacher-surface-muted:#181a22eb;--teacher-accent:#ff6b6b;--teacher-accent-strong:#ff5252;--teacher-info:#6aa9ff;--teacher-success:#54c58a;--teacher-warning:#f7c36c;--teacher-danger:#ff7575;--teacher-shadow-soft:0 18px 36px -28px #0000008c;--teacher-shadow-strong:0 28px 64px -32px #000000b3}.teacher-page-shell{font-family:var(--teacher-font-sans)}.teacher-baseline-page{width:100%;height:100%;min-height:100%;overflow:hidden auto}.teacher-baseline-page__inner{gap:var(--teacher-baseline-panel-gap);width:100%;min-height:100%;padding:var(--teacher-baseline-page-padding);flex-direction:column;display:flex}.teacher-baseline-grid{gap:var(--teacher-baseline-panel-gap);flex:auto;grid-template-columns:minmax(0,1.2fr) minmax(24rem,.82fr);align-items:stretch;min-height:0;display:grid}.teacher-baseline-surface{border:1px solid var(--color-border);-webkit-backdrop-filter:blur(18px);background:#ffffffd1;border-radius:28px;box-shadow:0 24px 56px -40px #0f172a47}html[data-theme=dark] .teacher-baseline-surface{background:#161822d1;box-shadow:0 28px 64px -40px #0000008f}.teacher-display-text{font-family:var(--teacher-font-display);letter-spacing:.01em}.teacher-header-shell{background:var(--teacher-surface);box-shadow:var(--teacher-shadow-soft)}.teacher-header-actions{gap:.75rem}.teacher-control-button{border:1px solid var(--color-border);background:var(--teacher-surface-strong);height:2.25rem;color:var(--color-text);box-shadow:var(--teacher-shadow-soft);border-radius:1rem;justify-content:center;align-items:center;gap:.5rem;padding:0 1rem;font-size:.75rem;font-weight:600;transition:transform .2s,box-shadow .2s,background .2s;display:inline-flex}.teacher-control-button.primary{background:linear-gradient(135deg,var(--teacher-accent),var(--teacher-accent-strong));color:#fff;border-color:#0000;box-shadow:0 18px 36px -24px #e53e3e73}.teacher-control-button:active{transform:translateY(1px)}.teacher-left-panel,.teacher-right-panel,.teacher-main-panel{background:var(--teacher-surface)}.teacher-stage-shell{box-shadow:var(--teacher-shadow-strong)}.teacher-animate-fade-in{animation:.35s ease-out both teacher-fade-in}.teacher-loading-shimmer{background:linear-gradient(90deg,#fff0,#fff9,#fff0) 0 0/200% 100%;animation:1.6s infinite 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.teacher-topbar{background:#14121a;box-shadow:0 1px #0f172a59}.teacher-search-shell{background:#fff;border:1px solid #0f172a0d;border-radius:999px;padding:4px 8px;box-shadow:0 1px 4px #0f172a0f}html[data-theme=dark] .teacher-search-shell{background:#ffffff0f;border-color:#ffffff14;box-shadow:0 1px 4px #00000059}.teacher-search-input{color:var(--color-text);border-radius:999px}.teacher-search-input::placeholder{color:#1f1d2373}html[data-theme=dark] .teacher-search-input::placeholder{color:#f4f2f880}.teacher-search-input:focus{background:#00000005;border-color:#e53e3e40;box-shadow:0 0 0 3px #e53e3e1f}html[data-theme=dark] .teacher-search-input:focus{background:#ffffff0f}.teacher-search-button{color:var(--color-text-secondary)}.teacher-plaza-switch{background:#0f172a0a;border:1px solid #0f172a14;border-radius:999px;gap:6px;padding:4px;box-shadow:inset 0 1px #fffc}.teacher-plaza-switch-btn{height:36px;color:var(--color-text-secondary);border-radius:999px;padding:0 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#ffffffc7}.teacher-seewo-side-panel-body{flex-direction:column;flex:auto;min-height:0;display:flex;overflow:hidden}.teacher-seewo-sidebar-section{min-height:0;overflow:hidden}.teacher-seewo-sidebar-section--students{flex:auto}.teacher-seewo-sidebar-section--tools{border-top:1px solid var(--seewo-border);flex:none}.teacher-seewo-panel-content--students{flex-direction:column;min-height:100%;padding-bottom:12px;display:flex}.teacher-seewo-panel-content--tools{flex-direction:column;min-height:0;padding-top:10px;display:flex}html[data-theme=dark] .teacher-seewo-side-panel{background:linear-gradient(#141824f5,#0a0e18eb);border-color:#94a3b829;box-shadow:0 28px 58px -36px #000000b8,inset 0 1px #ffffff0a}.teacher-seewo-iframe{background:#fff;border:0;width:100%;height:100%}.teacher-seewo-stage-loading,.teacher-seewo-stage-empty,.teacher-seewo-stage-error{width:100%;height:100%;color:var(--color-text-secondary);justify-content:center;align-items:center;gap:8px;font-size:14px;display:flex}.teacher-seewo-stage-error{color:#e11d48}.teacher-teach-control-stage{font-family:var(--teacher-font-sans);background-color:var(--teacher-teach-page-bg,#eafdf6);background-image:linear-gradient(var(--teacher-teach-grid-line,#fffc)2px,transparent 2px),linear-gradient(90deg,var(--teacher-teach-grid-line,#fffc)2px,transparent 2px);background-size:30px 30px}.teacher-teach-control-shell{flex-direction:column;gap:14px;width:100%;height:100%;min-height:0;padding:18px;display:flex;overflow:hidden}.teacher-teach-demo-header{justify-content:space-between;align-items:center;gap:16px;display:flex}.teacher-teach-demo-header__class,.teacher-teach-demo-header__meta{align-items:center;display:flex}.teacher-teach-demo-header__class{background:var(--teacher-teach-surface-bg,#fffffff2);border:2px solid #ffffffe6;border-radius:20px;gap:12px;padding:12px 18px;box-shadow:0 8px 18px -12px #10b98129}.teacher-teach-demo-header__brand{background:var(--teacher-teach-brand,#10b981);color:#fff;border-radius:14px;justify-content:center;align-items:center;width:40px;height:40px;display:inline-flex;box-shadow:inset 0 1px #ffffff4d}.teacher-teach-demo-header__copy{min-width:0}.teacher-teach-demo-header__status{letter-spacing:.12em;text-transform:uppercase;color:var(--teacher-teach-brand,#10b981);margin-top:4px;font-size:11px;font-weight:800}.teacher-teach-demo-header__right{align-items:center;gap:12px;display:flex}.teacher-teach-demo-header__selector{background:var(--teacher-teach-surface-bg,#fffffff2);min-height:50px;color:var(--teacher-teach-text-muted,#047857);border-radius:18px;align-items:center;gap:10px;padding:0 14px;display:flex;box-shadow:0 10px 24px -18px #10b98133,inset 0 1px #fffffff0}.teacher-teach-demo-header__selector span{letter-spacing:.12em;text-transform:uppercase;font-size:11px;font-weight:800}.teacher-teach-demo-header__selector select{min-width:180px;max-width:260px;height:36px;color:var(--teacher-teach-text-main,#064e3b);background:#fffffff0;border:2px solid #d1fae5f2;border-radius:999px;outline:none;padding:0 14px;font-size:13px;font-weight:700}.teacher-teach-demo-header__meta{background:var(--teacher-teach-surface-bg,#fffffff2);color:var(--teacher-teach-text-muted,#047857);border:2px solid #ffffffe6;border-radius:20px;gap:14px;padding:12px 18px;font-size:13px;font-weight:800;box-shadow:0 8px 18px -12px #10b9811f}.teacher-teach-demo-header__dot{background:#2dd4bf;border-radius:999px;width:10px;height:10px;margin-right:6px;display:inline-block;box-shadow:0 0 0 5px #2dd4bf24}.teacher-teach-demo-header__menu{background:var(--teacher-teach-brand,#10b981);color:#fff;border:2px solid #0596691a;border-radius:18px;justify-content:center;align-items:center;width:48px;height:48px;display:inline-flex;box-shadow:0 12px 22px -16px #10b98173}.teacher-teach-control-topbar{justify-content:space-between;align-items:center;gap:14px;padding:2px;display:flex}.teacher-teach-control-topbar__copy{flex:auto;min-width:0}.teacher-teach-control-topbar__stats{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:8px;display:flex}.teacher-teach-control-kicker,.teacher-teach-hero-card__eyebrow{letter-spacing:.14em;text-transform:uppercase;color:var(--teacher-teach-brand,#10b981);align-items:center;gap:6px;font-size:11px;font-weight:800;display:inline-flex}.teacher-teach-control-title{letter-spacing:-.03em;color:var(--teacher-teach-text-main,#064e3b);margin-top:6px;font-size:clamp(24px,2.4vw,30px);font-weight:800}.teacher-teach-control-description{max-width:640px;color:var(--teacher-teach-text-muted,#047857);margin-top:6px;font-size:13px;line-height:1.6}.teacher-teach-status-pill,.teacher-teach-chip{border-radius:999px;justify-content:center;align-items:center;min-height:34px;padding:0 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.teacher-seewo-panel-shell{background:linear-gradient(#141824f5,#0a0e18eb);border-color:#94a3b829;box-shadow:0 28px 58px -36px #000000b8,inset 0 1px #ffffff0a}html[data-theme=dark] .teacher-seewo-menu-chip,html[data-theme=dark] .teacher-seewo-menu-toggle,html[data-theme=dark] .teacher-seewo-page-tool-toggle,html[data-theme=dark] .teacher-seewo-page-strip,html[data-theme=dark] .teacher-seewo-page-nav__button,html[data-theme=dark] .teacher-seewo-page-nav__meta{color:#e2e8f0eb;background:linear-gradient(#1c212feb,#0f121cdb);border-color:#94a3b829}html[data-theme=dark] .teacher-seewo-menu-chip.utility{background:linear-gradient(#181c28e0,#0f121cd1)}html[data-theme=dark] .teacher-seewo-menu-chip.utility.danger{color:#fecdd3;background:linear-gradient(#5210269e,#3e0a1d8f);border-color:#fb718538}html[data-theme=dark] .teacher-seewo-menu-chip__icon,html[data-theme=dark] .teacher-seewo-menu-toggle__icon,html[data-theme=dark] 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10px);left:0;right:0}.teacher-seewo-panel-shell[data-mode=stage]{border-radius:20px;max-height:min(72vh,700px)}.teacher-seewo-page-tool-grid.compact{grid-template-columns:repeat(2,minmax(0,1fr))}}@keyframes teacher-seewo-panel-float-up{0%{opacity:0;transform:translateY(12px)scale(.985)}to{opacity:1;transform:translateY(0)scale(1)}}@keyframes teacher-seewo-snake-in{0%{opacity:0;transform:translate(20px)scaleX(.88)}to{opacity:1;transform:translate(0)scaleX(1)}}.teacher-seewo-panel-shell{z-index:14;border:1px solid var(--seewo-border);-webkit-backdrop-filter:blur(18px);transform-origin:bottom;pointer-events:auto;background:linear-gradient(#fffffff5,#f4f8ffeb);border-radius:24px;width:min(100vw - 32px,960px);max-height:min(42vh,420px);animation:.22s ease-out teacher-seewo-panel-float-up;position:absolute;bottom:calc(100% + 12px);left:auto;right:16px;overflow-y:auto;box-shadow:0 28px 58px -36px #0f172a94,inset 0 1px #ffffffc7}.teacher-seewo-panel-shell[data-mode=stage]{border-radius:32px;width:auto;max-height:min(78vh,820px);left:16px;right:16px;overflow:hidden}.teacher-seewo-panel-shell[data-mode=stage] .teacher-seewo-panel-content{padding:0}.teacher-seewo-panel-content{padding:16px}.teacher-seewo-page-tool-head{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.teacher-seewo-page-tool-head 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.teacher-seewo-picker-nav__button{color:#e2e8f0eb;background:linear-gradient(#1c212feb,#0f121cdb);border-color:#94a3b829}html[data-theme=dark] .teacher-seewo-page{background:linear-gradient(#1c212ff0,#111622e6);box-shadow:0 16px 32px -24px #00000080}html[data-theme=dark] .teacher-seewo-page.active{background:linear-gradient(#1f57d647,#1439923d);box-shadow:0 22px 36px -24px #2563eb6b,inset 0 0 0 1px #93c5fd29}html[data-theme=dark] .teacher-seewo-page-index{color:#bfdbfe;background:#3b82f62e}html[data-theme=dark] .teacher-seewo-page-title{color:#f8fafc}html[data-theme=dark] .teacher-seewo-page-badge{color:#e2e8f0db;background:#ffffff14}html[data-theme=dark] .teacher-seewo-page-tool-card{background:linear-gradient(#1c212feb,#0f121cdb);border-color:#94a3b829;box-shadow:0 16px 32px -24px #0000006b}html[data-theme=dark] .teacher-seewo-page-tool-card__icon{color:#bfdbfe;background:#3b82f62e}html[data-theme=dark] .teacher-seewo-page-tool-card__title{color:#f8fafc}html[data-theme=dark] 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