@keyframes _si{from{opacity:0}to{opacity:1}}

.legacy-content .lesson-header .kicker {color:var(--al)}.legacy-content .l-callout b {color:var(--al)}.legacy-content .task-list {display:flex;flex-direction:column;gap:16px}.legacy-content .task-card {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-card);overflow:hidden}.legacy-content .task-head {padding:16px 20px;display:flex;align-items:center;gap:13px;border-bottom:1px solid var(--border);background:rgba(0,0,0,.015)}.legacy-content .task-medal {font-size:26px;flex-shrink:0}.legacy-content .task-title {flex:1;min-width:0}.legacy-content .task-title h4 {font-size:15.5px;font-weight:800;color:var(--text)}.legacy-content .task-title p {font-size:12px;color:var(--sub);margin-top:2px}.legacy-content .task-time {flex-shrink:0;font-size:11.5px;font-weight:800;padding:4px 13px;border-radius:99px}.legacy-content .task-card.lv1 .task-time {background:rgba(22,163,74,.1);color:var(--success)}.legacy-content .task-card.lv2 .task-time {background:rgba(217,119,6,.1);color:var(--amber)}.legacy-content .task-card.lv3 .task-time {background:var(--al-soft);color:var(--al-deep)}.legacy-content .task-body {padding:18px 20px}.legacy-content .task-body > p {font-size:13.5px;color:var(--sub);line-height:1.8}.legacy-content .task-body > p b {color:var(--text)}.legacy-content .task-prompt {background:rgba(0,0,0,.035);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;font-size:13px;line-height:1.85;color:var(--text);white-space:pre-wrap;margin-top:12px}.legacy-content .task-prompt-foot {display:flex;justify-content:flex-end;margin-top:10px}.legacy-content .btn-al {background:var(--al);color:#fff;border:none;padding:8px 22px;border-radius:999px;font-size:13px;font-weight:800;cursor:pointer;font-family:inherit;transition:filter .15s,transform .15s}.legacy-content .btn-al:hover {filter:brightness(1.08);transform:translateY(-1px)}.legacy-content .btn-al.ok {background:var(--success)}.legacy-content .task-pass {margin-top:14px;padding:11px 15px;background:var(--al-soft);border-radius:var(--radius-sm);font-size:12.5px;line-height:1.7;color:var(--sub)}.legacy-content .task-pass b {color:var(--al-deep)}.legacy-content .report-box {margin-top:14px;border:1.5px dashed var(--al-line);border-radius:var(--radius-sm);padding:16px 18px;background:var(--al-soft)}.legacy-content .report-box h5 {font-size:13.5px;font-weight:800;color:var(--al-deep);margin-bottom:11px}.legacy-content .report-field {margin-bottom:11px}.legacy-content .report-field label {display:block;font-size:12px;font-weight:800;color:var(--sub);margin-bottom:5px}.legacy-content .report-field input {width:100%;border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:9px 13px;font-size:13.5px;font-family:inherit;color:var(--text);background:var(--card);outline:none;transition:border-color .15s}.legacy-content .report-field input:focus {border-color:var(--al)}.legacy-content .report-out {display:none;margin-top:13px;background:var(--card);border:1.5px solid var(--al-line);border-radius:var(--radius-sm);padding:14px 16px;font-size:13px;line-height:1.9;color:var(--text);white-space:pre-wrap}.legacy-content .report-out.show {display:block;animation:_si .35s ease}.legacy-content .report-actions {display:flex;gap:10px;margin-top:11px;flex-wrap:wrap}.legacy-content .report-hint {font-size:12px;color:var(--danger);margin-top:8px;display:none}.legacy-content .report-hint.show {display:block}.legacy-content .takeaway-box {background:linear-gradient(135deg,#fdf2f8,#fce7f3);border:1.5px solid #fbcfe8;border-radius:var(--radius);padding:24px 28px;margin-top:36px}.legacy-content .takeaway-box h3 {font-size:17px;font-weight:800;color:#9d174d;margin-bottom:10px}.legacy-content .takeaway-box ul {list-style:none;padding:0;margin:0}.legacy-content .takeaway-box li {font-size:14.5px;color:#831843;line-height:1.8;padding:4px 0 4px 22px;position:relative}.legacy-content .takeaway-box li::before {content:'';position:absolute;left:0;top:13px;width:8px;height:8px;border-radius:50%;background:#db2777}@media (max-width:768px){.legacy-content .task-head {padding:14px 15px}.legacy-content .task-body {padding:15px}.legacy-content .task-time {font-size:10.5px;padding:3px 10px}}

.legacy-content .xa-tldr {margin:18px 0 4px;padding:14px 18px;background:rgba(0,102,255,0.04);border:1px solid rgba(0,102,255,0.16);border-radius:10px}.legacy-content .xa-tldr .xa-tldr-tag {display:block;font-size:11px;font-weight:800;letter-spacing:1px;color:var(--accent,#0066ff);margin-bottom:6px}.legacy-content .xa-tldr p {margin:0;font-size:15px;line-height:1.8;color:var(--text,#1f2937)}