@import "https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700&display=swap";:root{--stu-bg:#e8edf3;--stu-bg-accent:#dce8e6;--stu-surface:#fff;--stu-text:#0c1222;--stu-text-secondary:#5c6578;--stu-text-muted:#8b95a8;--stu-border:#0c122214;--stu-primary:#0a6b63;--stu-primary-deep:#054e48;--stu-primary-light:#12a89c;--stu-primary-soft:#0a6b631a;--stu-primary-ring:#0a6b6338;--stu-danger:#c81e1e;--stu-danger-soft:#fef2f2;--stu-warning-soft:#fff8eb;--stu-warning-text:#9a6700;--stu-success-soft:#e8f7f4;--stu-success-text:#0a6b63;--stu-info-soft:#eef4ff;--stu-info-text:#1e4a8c;--stu-radius:14px;--stu-radius-lg:22px;--stu-radius-xl:28px;--stu-shadow-card:0 2px 4px #0c12220a, 0 16px 48px #0c122214;--stu-shadow-btn:0 8px 28px #0a6b6352;--stu-max:520px;--stu-max-wide:760px;--stu-tab-dock:88px;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;color:var(--stu-text);font-family:Noto Sans SC,-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}body{background:var(--stu-bg);min-width:320px;min-height:100vh;margin:0}button,input{font:inherit}button{cursor:pointer;border:0}input{border:1px solid var(--stu-border);border-radius:var(--stu-radius);width:100%;color:var(--stu-text);background:#f8fafb;margin:0;padding:14px 16px;font-size:1rem;transition:border-color .2s,background .2s,box-shadow .2s}input:focus{border-color:var(--stu-primary);background:var(--stu-surface);box-shadow:0 0 0 4px var(--stu-primary-ring);outline:none}input::placeholder{color:var(--stu-text-muted)}#app{min-height:100vh}a{color:var(--stu-primary);font-weight:500;text-decoration:none}.stu-app{background:radial-gradient(ellipse 120% 80% at 50% -20%, #0a6b6324, transparent 55%), radial-gradient(ellipse 80% 50% at 100% 0%, #ffffffe6, transparent 50%), var(--stu-bg);flex-direction:column;min-height:100vh;display:flex}.stu-main{flex:1;min-height:0}.stu-topbar{z-index:30;-webkit-backdrop-filter:blur(16px)saturate(1.2);backdrop-filter:blur(16px)saturate(1.2);border-bottom:1px solid var(--stu-border);background:#ffffffb8;justify-content:center;align-items:center;height:56px;padding:0 20px;display:flex;position:sticky;top:0}.stu-topbar__brand{align-items:center;gap:10px;display:inline-flex}.stu-topbar__mark{background:linear-gradient(145deg, var(--stu-primary-deep), var(--stu-primary-light));color:#fff;border-radius:10px;place-items:center;width:32px;height:32px;font-size:.9375rem;font-weight:700;display:grid;box-shadow:0 4px 12px #0a6b6359}.stu-topbar__name{letter-spacing:.06em;color:var(--stu-text);font-size:1.0625rem;font-weight:700}.stu-page{width:100%;max-width:var(--stu-max);margin:0 auto;padding:8px 20px 24px}.stu-page--tab{padding-bottom:var(--stu-tab-dock)}.stu-page--full{max-width:var(--stu-max-wide);padding-top:16px}.stu-hero{padding:12px 0 28px}.stu-hero__label{letter-spacing:.12em;text-transform:uppercase;color:var(--stu-primary);margin:0 0 10px;font-size:.8125rem;font-weight:500}.stu-hero__title{letter-spacing:-.03em;color:var(--stu-text);margin:0 0 14px;font-size:clamp(1.875rem,7vw,2.25rem);font-weight:700;line-height:1.15}.stu-hero__desc{max-width:28em;color:var(--stu-text-secondary);margin:0;font-size:.9375rem;line-height:1.75}.stu-notice{border-radius:var(--stu-radius);background:linear-gradient(135deg,#0a6b6314 0%,#0a6b630a 100%);border:1px solid #0a6b6324;margin:0 0 16px;padding:14px 16px}.stu-notice__list{gap:6px;margin:0;padding:0;list-style:none;display:grid}.stu-notice__list li{color:var(--stu-text-secondary);padding-left:14px;font-size:.8125rem;line-height:1.55;position:relative}.stu-notice__list li:before{content:"";background:var(--stu-primary);opacity:.65;border-radius:50%;width:5px;height:5px;position:absolute;top:.55em;left:0}.stu-pull-refresh{justify-content:center;align-items:flex-end;transition:height .15s;display:flex;overflow:hidden}.stu-pull-refresh span{color:var(--stu-text-muted);padding-bottom:6px;font-size:.75rem}.stu-pull-refresh--active span{color:var(--stu-primary)}.stu-list-load-more{text-align:center;padding:8px 0 4px}.stu-list-load-more p{color:var(--stu-text-muted);margin:0;font-size:.8125rem;line-height:1.6}.stu-section__head{justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:12px;padding:0 4px;display:flex}.stu-section__head h2{color:var(--stu-text);margin:0;font-size:1.0625rem;font-weight:600}.stu-section__head span{color:var(--stu-text-muted);font-size:.8125rem}.stu-page-header{margin-bottom:24px}.stu-page-header h1{letter-spacing:-.02em;margin:0 0 8px;font-size:1.5rem;font-weight:700}.stu-page-header p{color:var(--stu-text-secondary);margin:0;font-size:.9375rem;line-height:1.7}.stu-btn{border-radius:var(--stu-radius);letter-spacing:.02em;justify-content:center;align-items:center;gap:8px;min-height:50px;padding:0 22px;font-size:1rem;font-weight:600;transition:transform .15s,box-shadow .15s,background .15s,opacity .15s;display:inline-flex}.stu-btn:active:not(:disabled){transform:scale(.98)}.stu-btn--primary{background:linear-gradient(145deg, var(--stu-primary-deep) 0%, var(--stu-primary) 50%, var(--stu-primary-light) 100%);color:#fff;box-shadow:var(--stu-shadow-btn)}.stu-btn--primary:hover:not(:disabled){box-shadow:0 12px 36px #0a6b6366}.stu-btn--secondary{background:var(--stu-surface);color:var(--stu-text);border:1px solid var(--stu-border);box-shadow:0 2px 8px #0c12220a}.stu-btn--secondary:hover:not(:disabled){background:#f8fafb}.stu-btn--ghost{min-height:40px;color:var(--stu-text-secondary);background:0 0;padding:0 14px;font-size:.9375rem;font-weight:500}.stu-btn--ghost:hover:not(:disabled){color:var(--stu-primary);background:var(--stu-primary-soft)}.stu-btn--danger-outline{background:var(--stu-surface);color:var(--stu-danger);box-shadow:none;border:1.5px solid #c81e1e40}.stu-btn--danger-outline:hover:not(:disabled){background:var(--stu-danger-soft)}.stu-btn--block{width:100%}.stu-btn:disabled{opacity:.4;cursor:not-allowed;box-shadow:none!important}.stu-btn--lg{min-height:54px;font-size:1.0625rem}.stu-card{background:var(--stu-surface);border-radius:var(--stu-radius-lg);box-shadow:var(--stu-shadow-card);border:1px solid #fffc}.stu-card-body{padding:20px}.stu-card-head{justify-content:space-between;align-items:center;gap:12px;padding:18px 20px 0;display:flex}.stu-card-head h2{margin:0;font-size:1rem;font-weight:600}.stu-card-head span{color:var(--stu-text-muted);font-size:.8125rem}.stu-exam-card{background:var(--stu-surface);border-radius:var(--stu-radius-lg);border:1px solid var(--stu-border);box-shadow:var(--stu-shadow-card);flex-direction:column;padding:0;transition:border-color .2s,box-shadow .2s;display:flex;position:relative;overflow:hidden}.stu-exam-card--active{box-shadow:var(--stu-shadow-card), 0 0 0 1px #0a6b630f;border-color:#0a6b6338}.stu-exam-card--disabled{opacity:.92}.stu-exam-card__head{justify-content:space-between;align-items:flex-start;gap:12px;padding:18px 18px 14px;display:flex}.stu-exam-card__title{letter-spacing:-.01em;min-width:0;color:var(--stu-text);flex:1;margin:0;font-size:1.0625rem;font-weight:600;line-height:1.45}.stu-exam-card__meta{grid-template-columns:1fr 1fr;gap:10px 16px;margin:0;padding:0 18px 14px;list-style:none;display:grid}.stu-exam-card__meta li{border-radius:var(--stu-radius-sm,10px);background:#f4f6f9;flex-direction:column;gap:4px;min-width:0;padding:10px 12px;display:flex}.stu-exam-card--active .stu-exam-card__meta li{background:#0a6b630f}.stu-exam-card__meta-label{color:var(--stu-text-muted);letter-spacing:.04em;font-size:.75rem;font-weight:500}.stu-exam-card__meta-value{color:var(--stu-text);word-break:break-all;font-size:.8125rem;font-weight:600;line-height:1.4}.stu-exam-card__review{border-radius:var(--stu-radius-sm,10px);border:1px dashed var(--stu-border);background:#f8fafb;justify-content:space-between;align-items:center;gap:12px;margin:0 18px 12px;padding:10px 12px;font-size:.8125rem;font-style:normal;display:flex}.stu-exam-card__review span{color:var(--stu-text-muted);font-weight:500}.stu-exam-card__review em{color:var(--stu-text-secondary);font-style:normal;font-weight:600}.stu-exam-card__score{border-radius:var(--stu-radius-sm,10px);background:linear-gradient(135deg,#0a6b6314,#14b8a60f);justify-content:space-between;align-items:center;gap:12px;margin:0 18px 12px;padding:12px 14px;display:flex}.stu-exam-card__score-main{align-items:baseline;gap:8px;min-width:0;display:flex}.stu-exam-card__score-label{color:var(--stu-text-secondary);font-size:.8125rem}.stu-exam-card__score-value{color:var(--stu-primary-deep);font-size:1.125rem}.stu-btn--sm{min-height:32px;padding:6px 12px;font-size:.8125rem}.stu-exam-card__footer{margin-top:auto;padding:16px 18px 18px}.stu-exam-card--disabled .stu-exam-card__footer .stu-btn--primary{color:#9ca3af;box-shadow:none;background:#e5e7eb}.stu-list{gap:16px;display:grid}@media (width<=380px){.stu-exam-card__meta{grid-template-columns:1fr}}.stu-empty{text-align:center;padding:56px 24px}.stu-empty p{color:var(--stu-text-muted);margin:0;font-size:.9375rem}.stu-error{color:var(--stu-danger);margin:0;font-size:.875rem;line-height:1.6}.stu-hint{color:var(--stu-text-muted);margin:0;font-size:.8125rem;line-height:1.6}.stu-badge{white-space:nowrap;border-radius:999px;flex-shrink:0;align-items:center;padding:5px 12px;font-size:.75rem;font-weight:600;display:inline-flex}.stu-badge--active{background:var(--stu-success-soft);color:var(--stu-success-text)}.stu-badge--pending{background:var(--stu-warning-soft);color:var(--stu-warning-text)}.stu-badge--done{background:var(--stu-info-soft);color:var(--stu-info-text)}.stu-badge--muted{color:var(--stu-text-secondary);background:#f0f2f5}.stu-auth{background:var(--stu-bg);flex-direction:column;min-height:100vh;display:flex}.stu-auth-hero{text-align:center;color:#fff;background:linear-gradient(165deg, #033d39 0%, var(--stu-primary-deep) 35%, var(--stu-primary) 70%, #14b8a6 100%);border-radius:0 0 36px 36px;flex-direction:column;flex-shrink:0;justify-content:center;align-items:center;padding:40px 28px 44px;display:flex;box-shadow:0 24px 48px #054e4840}.stu-auth-hero__mark{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffff29;border:1px solid #ffffff47;border-radius:20px;place-items:center;width:72px;height:72px;margin-bottom:20px;font-size:2rem;font-weight:700;display:grid}.stu-auth-hero h1{letter-spacing:.14em;margin:0 0 8px;font-size:2rem;font-weight:700}.stu-auth-hero p{opacity:.88;letter-spacing:.2em;margin:0;font-size:.9375rem}.stu-auth-sheet{flex-shrink:0;margin-top:-32px;padding:0 20px 40px}.stu-auth-panel{background:var(--stu-surface);border-radius:var(--stu-radius-xl);max-width:440px;box-shadow:var(--stu-shadow-card);margin:0 auto;padding:36px 28px 32px}.stu-auth-panel h2{letter-spacing:-.02em;margin:0 0 8px;font-size:1.375rem;font-weight:700}.stu-auth-panel>p{color:var(--stu-text-secondary);margin:0 0 28px;font-size:.9375rem;line-height:1.7}.stu-form{gap:20px;display:grid}.stu-form label{gap:8px;display:grid}.stu-form label span{color:var(--stu-text-secondary);font-size:.875rem;font-weight:500}.stu-profile-card{border-radius:var(--stu-radius-xl);background:var(--stu-surface);box-shadow:var(--stu-shadow-card);overflow:hidden}.stu-profile-card__head{text-align:center;color:#fff;background:linear-gradient(165deg, #033d39 0%, var(--stu-primary-deep) 40%, var(--stu-primary-light) 100%);padding:40px 24px 56px}.stu-profile-avatar{background:#fff3;border:3px solid #ffffff59;border-radius:50%;place-items:center;width:80px;height:80px;margin:0 auto 16px;font-size:2rem;font-weight:700;display:grid}.stu-profile-name{margin:0 0 6px;font-size:1.5rem;font-weight:700}.stu-profile-id{opacity:.9;margin:0;font-size:.9375rem}.stu-profile-card__body{margin-top:-28px;padding:0 20px 28px}.stu-info-panel{background:var(--stu-surface);border-radius:var(--stu-radius-lg);border:1px solid var(--stu-border);padding:8px 0 24px;box-shadow:0 4px 20px #0c12220f}.stu-info-row{border-bottom:1px solid var(--stu-border);justify-content:space-between;align-items:center;gap:16px;padding:16px 20px;display:flex}.stu-info-row:last-child{border-bottom:0}.stu-info-row dt{color:var(--stu-text-secondary);margin:0;font-size:.9375rem;font-weight:400}.stu-info-row dd{margin:0;font-size:.9375rem;font-weight:600}.stu-card-message{text-align:center;padding:32px 24px}.stu-status{background:radial-gradient(ellipse 100% 60% at 50% 0%, #0a6b631f, transparent), var(--stu-bg);place-items:center;min-height:100vh;padding:40px 24px;display:grid}.stu-status-card{text-align:center;background:var(--stu-surface);border-radius:var(--stu-radius-xl);width:100%;max-width:420px;box-shadow:var(--stu-shadow-card);padding:48px 32px}.stu-status-icon{color:#fff;background:linear-gradient(145deg, var(--stu-primary-deep), var(--stu-primary-light));border-radius:50%;place-items:center;width:72px;height:72px;margin:0 auto 28px;font-size:1.75rem;font-weight:700;display:grid;box-shadow:0 12px 32px #0a6b6359}.stu-status-card h1{margin:0 0 12px;font-size:1.5rem;font-weight:700}.stu-status-card p{color:var(--stu-text-secondary);margin:0;font-size:.9375rem;line-height:1.75}.stu-status-actions{gap:12px;margin-top:32px;display:grid}.stu-result-score{margin-top:16px;font-size:1.125rem}.stu-result-score strong{color:var(--stu-primary-deep);font-size:2rem}.stu-result-meta{margin-top:8px}.stu-result-questions{text-align:left;gap:8px;margin:20px 0 0;padding:0;list-style:none;display:grid}.stu-result-questions li{border-radius:var(--stu-radius-sm,10px);background:#f4f6f9;justify-content:space-between;gap:12px;padding:10px 12px;font-size:.875rem;display:flex}.stu-result-questions__stem{text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.stu-result-questions__status{white-space:nowrap;font-weight:600}.stu-result-questions__status.is-correct{color:var(--stu-primary-deep)}.stu-result-questions__status.is-wrong{color:#c0392b}.stu-play-page{background:radial-gradient(ellipse 120% 80% at 50% -20%, #0a6b6324, transparent 55%), radial-gradient(ellipse 80% 50% at 100% 0%, #ffffffe6, transparent 50%), var(--stu-bg);flex-direction:column;min-height:100vh;display:flex}.stu-play-bar{z-index:30;-webkit-backdrop-filter:blur(16px)saturate(1.2);backdrop-filter:blur(16px)saturate(1.2);border-bottom:1px solid var(--stu-border);background:#ffffffc7;align-items:center;gap:10px;padding:10px 16px;display:flex;position:sticky;top:0}.stu-play-bar__back{color:var(--stu-primary);cursor:pointer;background:0 0;border:0;border-radius:10px;flex-shrink:0;align-items:center;gap:2px;margin:0;padding:8px 10px 8px 6px;font-size:.9375rem;font-weight:500;transition:background .15s;display:inline-flex}.stu-play-bar__back:hover{background:var(--stu-primary-soft)}.stu-play-bar__info{flex:1;align-items:center;min-width:0;display:flex}.stu-play-bar__meta{margin-top:0}.stu-badge--live{color:#fff;letter-spacing:.06em;background:linear-gradient(135deg,#047857 0%,#10b981 50%,#34d399 100%);align-items:center;gap:7px;padding:5px 14px 5px 10px;font-size:.8125rem;font-weight:700;animation:1.6s ease-in-out infinite stu-badge-glow;display:inline-flex;box-shadow:inset 0 0 0 2px #ffffff80,0 0 0 4px #10b98159,0 6px 20px #05966973}.stu-badge--live-dot{background:#fff;border-radius:50%;width:9px;height:9px;animation:1s ease-in-out infinite stu-badge-blink;box-shadow:0 0 6px #ffffffe6}.stu-badge--expired{color:#b91c1c;background:#fef2f2;border:1px solid #dc262640;font-weight:700}.stu-play-countdown{background:linear-gradient(145deg,#ecfdf5,#d1fae5);border:2px solid #10b98173;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;min-width:76px;padding:10px 14px;display:flex;box-shadow:0 4px 16px #10b98133}.stu-play-countdown__time{font-variant-numeric:tabular-nums;letter-spacing:.06em;color:#047857;font-size:1.375rem;font-weight:800;line-height:1}.stu-play-countdown--urgent{background:linear-gradient(145deg,#fef2f2,#fee2e2);border-color:#ef44448c;animation:1s ease-in-out infinite stu-countdown-urgent;box-shadow:0 4px 20px #ef444440}.stu-play-countdown--urgent .stu-play-countdown__time{color:#dc2626}@keyframes stu-countdown-urgent{0%,to{box-shadow:0 4px 20px #ef444440}50%{box-shadow:0 4px 24px #ef444473}}.stu-play-expired{text-align:center;background:var(--stu-surface);border-radius:var(--stu-radius-lg);box-shadow:var(--stu-shadow-card);border:1px solid #dc262626;padding:32px 24px}.stu-play-expired p{color:var(--stu-text-secondary);margin:0 0 20px;font-size:.9375rem;line-height:1.7}@keyframes stu-badge-glow{0%,to{box-shadow:inset 0 0 0 2px #ffffff80,0 0 0 4px #10b98159,0 6px 20px #05966973}50%{box-shadow:inset 0 0 0 2px #ffffffa6,0 0 0 6px #34d39980,0 8px 28px #0596698c}}@keyframes stu-badge-blink{0%,to{opacity:1}50%{opacity:.35}}.stu-play-main{width:100%;max-width:var(--stu-max);padding:16px 20px calc(24px + env(safe-area-inset-bottom));flex:1;margin:0 auto}.stu-play-card{border:1px solid var(--stu-border)}.stu-play-top,.stu-play-header{justify-content:space-between;align-items:center;gap:12px;margin-bottom:20px;display:flex}.stu-play-title{letter-spacing:-.02em;margin:0 0 20px;font-size:1.375rem;font-weight:700;line-height:1.35}.stu-question-title{margin:0 0 16px;font-size:1.0625rem;font-weight:600;line-height:1.55}.stu-play-all-done{border-radius:var(--stu-radius);background:linear-gradient(135deg,#27ae601f 0%,#2ecc710f 100%);border:2px solid #2ecc7180;margin-bottom:16px;padding:14px 16px;box-shadow:0 8px 24px #27ae6026}.stu-play-all-done__title{color:#1a6b42;letter-spacing:.02em;margin-bottom:6px;font-size:1.05rem;font-weight:800;display:block}.stu-play-all-done__text{color:var(--stu-text-secondary);margin:0;font-size:.875rem;line-height:1.55}.stu-play-stats{flex-wrap:wrap;gap:8px;margin-bottom:16px;display:flex}.stu-play-stat{color:var(--stu-text-secondary);background:#f0f2f5;border-radius:999px;padding:6px 14px;font-size:.8125rem;font-weight:500}.stu-image-stage{border-radius:var(--stu-radius);cursor:crosshair;touch-action:none;background:#1a1f2e;justify-content:center;align-items:center;min-height:300px;display:flex;position:relative;overflow:hidden;box-shadow:inset 0 0 0 1px #ffffff0f}.stu-image-transform{transform-origin:50%;line-height:0;position:relative}.stu-image-transform img{width:auto;max-width:100%;height:auto;max-height:min(60vh,480px);display:block}.stu-marker{pointer-events:none;background:#ff4d4f;border:3px solid #fff;border-radius:50%;width:20px;height:20px;position:absolute;transform:translate(-50%,-50%);box-shadow:0 4px 16px #ff4d4f80}.stu-play-nav{grid-template-columns:1fr 1fr 1fr;gap:10px;margin:20px 0;display:grid}.stu-play-nav .stu-btn--danger-outline{min-width:0}.stu-play-footer{margin-top:8px}.stu-play-hints{gap:4px;margin:14px 0 0;display:grid}.stu-modal-backdrop{z-index:100;background:#0f172a73;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.stu-modal{background:var(--stu-surface);border-radius:var(--stu-radius-xl);width:100%;max-width:360px;box-shadow:var(--stu-shadow-card);overflow:hidden}.stu-modal__head{justify-content:space-between;align-items:center;gap:12px;padding:18px 20px 0;display:flex}.stu-modal__head h3{margin:0;font-size:1.0625rem;font-weight:700}.stu-modal__close{width:32px;height:32px;color:var(--stu-text-secondary);cursor:pointer;background:#f0f2f5;border:0;border-radius:999px;font-size:1.25rem;line-height:1}.stu-modal__body{padding:16px 20px 8px}.stu-modal__score{color:var(--stu-text-secondary);text-align:center;margin:0 0 16px;font-size:.9375rem}.stu-modal__score strong{color:var(--stu-primary-deep);font-size:1.75rem}.stu-modal__stats{grid-template-columns:1fr 1fr;gap:12px;margin:0;padding:0;list-style:none;display:grid}.stu-modal__stats li{border-radius:var(--stu-radius-md,12px);color:var(--stu-text-secondary);background:#f4f6f9;flex-direction:column;align-items:center;gap:4px;padding:14px 10px;font-size:.8125rem;display:flex}.stu-modal__stats strong{color:var(--stu-text);font-size:1.5rem}.stu-modal__foot{padding:8px 20px 20px}.stu-score-card{background:var(--stu-surface);border-radius:var(--stu-radius-lg);box-shadow:var(--stu-shadow-card);padding:22px;position:relative}.stu-score-head{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:12px;display:flex}.stu-score-head h3{margin:0;font-size:1.0625rem;font-weight:600}.stu-score-summary{gap:4px;display:grid}.stu-score-summary p{color:var(--stu-text-secondary);margin:0;font-size:.875rem}.stu-score-summary strong{color:var(--stu-primary);font-size:1.25rem}.stu-score-detail{border-top:1px solid var(--stu-border);gap:8px;margin-top:16px;padding-top:16px;display:grid}.stu-score-detail-item{border-radius:var(--stu-radius-sm,10px);background:#f4f6f9;justify-content:space-between;gap:12px;padding:12px 14px;font-size:.875rem;display:flex}.stu-score-detail-item strong{flex:1;font-weight:500}.stu-score-detail-item span{color:var(--stu-text-secondary);white-space:nowrap;font-weight:600}.stu-tabbar-wrap{z-index:40;padding:12px 20px calc(16px + env(safe-area-inset-bottom));pointer-events:none;position:fixed;bottom:0;left:0;right:0}.stu-tabbar{pointer-events:auto;max-width:var(--stu-max);-webkit-backdrop-filter:blur(20px)saturate(1.3);backdrop-filter:blur(20px)saturate(1.3);background:#ffffffeb;border:1px solid #ffffffe6;border-radius:20px;grid-template-columns:1fr 1fr;gap:6px;margin:0 auto;padding:6px;display:grid;box-shadow:0 4px 6px #0c12220a,0 20px 48px #0c12221f}.stu-tab{min-height:52px;color:var(--stu-text-muted);background:0 0;border-radius:14px;justify-content:center;align-items:center;gap:8px;font-size:.9375rem;font-weight:500;transition:background .2s,color .2s,box-shadow .2s;display:flex}.stu-tab svg{width:22px;height:22px}.stu-tab--active{background:linear-gradient(145deg, var(--stu-primary-deep), var(--stu-primary));color:#fff;font-weight:600;box-shadow:0 6px 20px #0a6b6359}@media (width>=600px){.stu-page{padding:16px 24px 32px}.stu-hero__title{font-size:2.5rem}.stu-auth-hero h1{font-size:2.25rem}}@media (width<=360px){.stu-play-nav{gap:8px}.stu-play-nav .stu-btn{padding:0 10px;font-size:.9375rem}}