@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 .sum-table-wrap {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-card);overflow:hidden}.legacy-content .sum-table {width:100%;border-collapse:collapse}.legacy-content .sum-table th {font-size:11.5px;font-weight:800;letter-spacing:.6px;text-transform:uppercase;color:var(--sub);text-align:left;padding:12px 14px;background:var(--al-soft);border-bottom:1.5px solid var(--al-line)}.legacy-content .sum-table td {padding:14px;border-bottom:1px solid var(--border);font-size:13px;line-height:1.7;color:var(--sub);vertical-align:top}.legacy-content .sum-table tr:last-child td {border-bottom:none}.legacy-content .sum-table tbody tr {transition:background .15s}.legacy-content .sum-table tbody tr:hover {background:var(--al-soft)}.legacy-content .st-name {white-space:nowrap}.legacy-content .st-name .st-icon {font-size:19px;margin-right:7px;vertical-align:-2px}.legacy-content .st-name b {font-size:14px;font-weight:800;color:var(--text)}.legacy-content .sum-table tbody tr:hover .st-name b {color:var(--al-deep)}.legacy-content .st-motto {font-weight:700;color:var(--text);font-style:normal}.legacy-content .st-ai b {color:var(--al-deep);font-weight:700}.legacy-content .st-lessons {white-space:nowrap}.legacy-content .st-lessons span {display:inline-block;font-size:10.5px;font-weight:800;color:var(--al-deep);background:var(--al-soft);border:1px solid var(--al-line);border-radius:99px;padding:1px 8px;margin:1px 2px 1px 0}.legacy-content .quiz-list {display:flex;flex-direction:column;gap:14px}.legacy-content .quiz-item {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-card);padding:18px 20px}.legacy-content .quiz-q {font-size:14px;font-weight:700;color:var(--text);line-height:1.7;margin-bottom:12px}.legacy-content .quiz-q .qz-no {display:inline-block;font-size:11px;font-weight:900;color:#fff;background:var(--al);border-radius:99px;padding:1px 9px;margin-right:8px;vertical-align:1px}.legacy-content .quiz-opts {display:grid;grid-template-columns:1fr 1fr;gap:9px}.legacy-content .quiz-opt {border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;font-size:13px;color:var(--text);cursor:pointer;transition:border-color .15s,background .15s}.legacy-content .quiz-opt:hover {border-color:var(--al-line)}.legacy-content .quiz-item.done .quiz-opt {cursor:default;opacity:.65}.legacy-content .quiz-opt.right {border-color:var(--success);background:rgba(22,163,74,.08);opacity:1 !important;font-weight:700}.legacy-content .quiz-opt.wrong {border-color:var(--danger);background:rgba(220,38,38,.06);opacity:1 !important}.legacy-content .quiz-exp {display:none;margin-top:11px;font-size:13px;line-height:1.75;color:var(--sub);border-top:1px dashed var(--border);padding-top:10px}.legacy-content .quiz-exp b {color:var(--al-deep)}.legacy-content .quiz-item.done .quiz-exp {display:block;animation:_si .3s ease}.legacy-content .quiz-result {margin-top:16px;padding:18px 22px;border-radius:var(--radius);background:var(--al-soft);border:1.5px dashed var(--al-line);display:none}.legacy-content .quiz-result.show {display:block;animation:_si .35s ease}.legacy-content .quiz-result h4 {font-size:15px;font-weight:800;color:var(--al-deep);margin-bottom:6px}.legacy-content .quiz-result p {font-size:13.5px;line-height:1.8;color:var(--sub)}.legacy-content .quiz-result p b {color:var(--al-deep)}.legacy-content .duo-card {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-card);padding:24px 26px}.legacy-content .duo-row {display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:stretch}.legacy-content .duo-half {border-radius:var(--radius-sm);padding:16px 18px;border:1.5px solid}.legacy-content .duo-half.ds {background:rgba(2,132,199,.06);border-color:rgba(2,132,199,.25)}.legacy-content .duo-half.al {background:var(--al-soft);border-color:var(--al-line)}.legacy-content .duo-half h4 {font-size:14.5px;font-weight:800;margin-bottom:5px}.legacy-content .duo-half.ds h4 {color:#075985}.legacy-content .duo-half.al h4 {color:var(--al-deep)}.legacy-content .duo-half p {font-size:12.5px;color:var(--sub);line-height:1.7}.legacy-content .duo-x {display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:900;color:var(--sub)}.legacy-content .duo-sum {margin-top:16px;border-top:1px dashed var(--border);padding-top:14px;font-size:13.5px;line-height:1.85;color:var(--sub)}.legacy-content .duo-sum b {color:var(--text)}.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 .sum-table-wrap {overflow-x:auto}.legacy-content .sum-table {min-width:640px}.legacy-content .quiz-opts {grid-template-columns:1fr}.legacy-content .duo-row {grid-template-columns:1fr}.legacy-content .duo-x {padding:4px 0}}

.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)}