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16px;padding-bottom:max(12px,env(safe-area-inset-bottom));text-align:center;font-size:12px;line-height:1.5;color:#999;background:#fff7ef}.login-beian a{color:#999;text-decoration:none}.login-beian a:hover{text-decoration:underline}.lesson-exit-mask{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1500;background:#00000073;display:flex;align-items:center;justify-content:center;padding:16px}.lesson-exit-panel{width:100%;max-width:360px;background:var(--color-white, #fff);border-radius:var(--radius-xl, 24px);padding:var(--radius-xl, 24px);box-shadow:0 8px 20px #00000029;display:flex;flex-direction:column;gap:var(--radius-xl, 24px)}.lesson-exit-content{display:flex;flex-direction:column;gap:16px;width:100%}.lesson-exit-title{margin:0;font-size:24px;font-weight:700;line-height:32px;color:var(--color-text, #1f1f1f);text-align:left;word-break:break-word}.lesson-exit-body{margin:0;font-size:16px;font-weight:400;line-height:24px;color:var(--color-text, #1f1f1f);text-align:left;word-break:break-word}.lesson-exit-actions{display:flex;flex-direction:row;gap:16px;width:100%}.lesson-exit-primary,.lesson-exit-secondary{flex:1 1 0;min-width:0;height:56px;border-radius:16px;font-size:16px;font-weight:700;line-height:24px;cursor:pointer;text-align:center}.lesson-exit-primary{border:none;background:var(--color-yellow, #fff737);color:var(--color-text, #1f1f1f)}.lesson-exit-secondary{border:2px solid var(--color-stroke, #d9dde3);background:var(--color-white, #fff);color:var(--color-text, #1f1f1f)}.lesson-stage-progress-root{position:fixed;top:0;right:0;bottom:0;left:0;z-index:570;pointer-events:none}.lesson-stage-progress-trigger{position:absolute;left:0;right:0;bottom:0;height:20%;pointer-events:auto;touch-action:manipulation}.lesson-stage-progress-overlay{position:absolute;left:0;right:0;bottom:0;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;padding:64px 24px 24px;background:linear-gradient(180deg,#0000,#000000b8);opacity:0;visibility:hidden;transition:opacity .22s ease-in-out,visibility .22s ease-in-out;pointer-events:none}.lesson-stage-progress-overlay.is-visible{opacity:1;visibility:visible;pointer-events:auto}.lesson-stage-progress-row{display:flex;align-items:center;gap:24px;width:min(810px,calc(100vw - 48px))}.lesson-stage-progress-toggle{flex-shrink:0;width:40px;height:40px;padding:0;border:none;background:transparent;cursor:pointer}.lesson-stage-progress-toggle img{display:block;width:40px;height:40px}.lesson-stage-progress-track{position:relative;flex:1;min-width:0;height:12px;border-radius:6px;background:#fff9;overflow:hidden;pointer-events:none}.lesson-stage-progress-fill{position:absolute;left:0;top:0;height:100%;border-radius:6px;background:var(--color-primary, #04adff);width:0;transition:width .32s ease-in-out}.task-page{height:100%;min-height:100%;overflow-y:auto;overscroll-behavior-y:contain;-webkit-overflow-scrolling:touch;padding:16px;background:#f8fafc;color:#0f172a}.task-page-wrap{max-width:1280px;margin:0 auto;display:grid;gap:12px}.task-page-nav{display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:10px 12px}.task-page-nav h1{margin:0;font-size:18px}.task-stage-tabs{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:8px}.task-stage-tabs button{border:1px solid #cbd5e1;border-radius:10px;background:#fff;color:#0f172a;font-weight:700;padding:8px 10px}.task-stage-tabs button.active{border-color:#2563eb;background:#dbeafe;color:#1d4ed8}.task-stage-panel{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:12px}.task-stage-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px}.task-stage-head strong{font-size:16px}.task-stage-head span{font-size:12px;color:#475569}.task-columns{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.task-column{border:1px solid #e2e8f0;border-radius:10px;background:#f8fafc;padding:8px}.task-column>header{font-size:12px;color:#475569;margin-bottom:6px}.task-column ul{list-style:none;padding:0;margin:0;display:grid;gap:6px}.task-lesson-item{width:100%;border-radius:8px;border:1px solid #cbd5e1;background:#fff;padding:8px;text-align:left;display:grid;grid-template-columns:1fr auto;grid-template-areas:"left right" "status status";align-items:center;row-gap:4px}.task-lesson-item .lesson-left{grid-area:left;font-weight:700}.task-lesson-item .lesson-right{grid-area:right;font-family:ui-monospace,SFMono-Regular,SFMono-Regular,Menlo,Monaco,Consolas,monospace}.task-lesson-item small{grid-area:status;color:#64748b}.task-lesson-item.available{border-color:#2563eb;background:#eff6ff}.task-lesson-item.completed_reward_partial{border-color:#f59e0b;background:#fff7ed}.task-lesson-item.completed_reward_full{border-color:#22c55e;background:#ecfdf5}.task-lesson-item.completed_stage_review{border-color:#8b5cf6;background:#f5f3ff}.task-lesson-item.locked,.task-lesson-item:disabled{border-color:#cbd5e1;background:#f1f5f9;color:#64748b;cursor:not-allowed}