@keyframes _si{to{opacity:1}}

.legacy-content .concept-pair {display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:16px 0}@media(max-width:768px){.legacy-content .concept-pair {grid-template-columns:1fr}}.legacy-content .concept-box {border-radius:var(--radius);padding:22px 24px;display:flex;flex-direction:column;gap:10px}.legacy-content .concept-box.ctx {background:rgba(217,119,6,.04);border:1.5px solid rgba(217,119,6,.2)}.legacy-content .concept-box.ses {background:rgba(0,102,255,.04);border:1.5px solid rgba(0,102,255,.2)}.legacy-content .concept-box .cb-badge {font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.5px;padding:3px 10px;border-radius:6px;display:inline-block;width:fit-content}.legacy-content .concept-box.ctx .cb-badge {background:rgba(217,119,6,.1);color:var(--amber)}.legacy-content .concept-box.ses .cb-badge {background:rgba(0,102,255,.1);color:var(--accent)}.legacy-content .concept-box .cb-title {font-size:18px;font-weight:800;color:var(--text)}.legacy-content .concept-box .cb-desc {font-size:14px;color:var(--text);line-height:1.8}.legacy-content .concept-box .cb-keyword {font-size:13px;font-weight:700;padding:8px 14px;border-radius:8px;display:inline-block}.legacy-content .concept-box.ctx .cb-keyword {background:rgba(217,119,6,.06);color:var(--amber)}.legacy-content .concept-box.ses .cb-keyword {background:rgba(0,102,255,.06);color:var(--accent)}.legacy-content .reason-box {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);padding:24px 28px;margin:16px 0;box-shadow:var(--shadow-card)}.legacy-content .reason-box .rb-title {font-size:16px;font-weight:800;color:var(--text);margin-bottom:14px;display:flex;align-items:center;gap:10px}.legacy-content .reason-box .rb-title svg {color:var(--danger)}.legacy-content .reason-box .rb-items {list-style:none;padding:0}.legacy-content .reason-box .rb-items li {padding:12px 0;border-bottom:1px solid var(--border);display:flex;align-items:flex-start;gap:12px;font-size:14px;color:var(--text);line-height:1.7}.legacy-content .reason-box .rb-items li:last-child {border-bottom:none}.legacy-content .reason-box .rb-items .rb-num {flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--danger);color:#fff;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}.legacy-content .api-block {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);padding:24px 28px;margin:16px 0;box-shadow:var(--shadow-card)}.legacy-content .api-block .api-title {font-size:15px;font-weight:800;color:var(--text);margin-bottom:12px;display:flex;align-items:center;gap:10px}.legacy-content .api-block .api-title svg {color:var(--accent)}.legacy-content .api-block .api-desc {font-size:14px;color:var(--text);line-height:1.8;margin-bottom:14px}.legacy-content .code-block {background:var(--surface-soft);border-radius:var(--radius);padding:20px 24px;margin:12px 0;overflow-x:auto;font-family:"SF Mono","Fira Code",Menlo,monospace;font-size:13px;line-height:1.7;color:var(--muted);box-shadow:var(--shadow-card)}.legacy-content .code-block .ck {color:var(--muted)}.legacy-content .code-block .cs {color:var(--muted)}.legacy-content .code-block .cn {color:var(--muted)}.legacy-content .code-block .cp {color:var(--muted)}.legacy-content .code-block .cc {color:#6c7086;font-style:italic}.legacy-content .flex-box {background:rgba(124,58,237,.03);border:1.5px solid rgba(124,58,237,.18);border-radius:var(--radius);padding:22px 26px;margin:16px 0}.legacy-content .flex-box .fx-title {font-size:15px;font-weight:800;color:var(--purple);margin-bottom:12px;display:flex;align-items:center;gap:10px}.legacy-content .flex-box .fx-title svg {color:var(--purple)}.legacy-content .flex-box .fx-items {list-style:none;padding:0}.legacy-content .flex-box .fx-items li {padding:10px 0;border-bottom:1px solid rgba(124,58,237,.1);font-size:14px;color:var(--text);line-height:1.7;display:flex;gap:10px;align-items:flex-start}.legacy-content .flex-box .fx-items li:last-child {border-bottom:none}.legacy-content .flex-box .fx-items .fx-icon {flex-shrink:0;color:var(--purple);margin-top:2px}.legacy-content .compare-table {width:100%;border-collapse:separate;border-spacing:0;border-radius:var(--radius);overflow:hidden;border:1.5px solid var(--border);box-shadow:var(--shadow-card);margin:16px 0}.legacy-content .compare-table th {background:var(--bg);padding:14px 18px;font-size:13px;font-weight:700;color:var(--text);text-align:left;border-bottom:1.5px solid var(--border)}.legacy-content .compare-table td {padding:14px 18px;font-size:14px;color:var(--text);background:var(--card);border-bottom:1px solid var(--border);line-height:1.6}.legacy-content .compare-table tr:last-child td {border-bottom:none}.legacy-content .compare-table .tag-ctx {display:inline-block;font-size:11px;font-weight:700;padding:2px 8px;border-radius:4px;background:rgba(217,119,6,.1);color:var(--amber)}.legacy-content .compare-table .tag-ses {display:inline-block;font-size:11px;font-weight:700;padding:2px 8px;border-radius:4px;background:rgba(0,102,255,.1);color:var(--accent)}.legacy-content .hw-analogy {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);padding:24px;margin:16px 0;box-shadow:var(--shadow-card);display:flex;gap:0;align-items:stretch}@media(max-width:768px){.legacy-content .hw-analogy {flex-direction:column}}.legacy-content .hw-side {flex:1;padding:18px 20px;display:flex;flex-direction:column;align-items:center;text-align:center;gap:10px}.legacy-content .hw-side .hw-icon {width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center}.legacy-content .hw-side.memory .hw-icon {background:rgba(217,119,6,.08);color:var(--amber)}.legacy-content .hw-side.disk .hw-icon {background:rgba(0,102,255,.08);color:var(--accent)}.legacy-content .hw-side .hw-label {font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.legacy-content .hw-side.memory .hw-label {color:var(--amber)}.legacy-content .hw-side.disk .hw-label {color:var(--accent)}.legacy-content .hw-side .hw-name {font-size:16px;font-weight:800;color:var(--text)}.legacy-content .hw-side .hw-desc {font-size:13px;color:var(--sub);line-height:1.6}.legacy-content .hw-divider {width:1px;background:var(--border);flex-shrink:0;margin:0 8px}@media(max-width:768px){.legacy-content .hw-divider {width:100%;height:1px;margin:8px 0}}.legacy-content .takeaway {background:rgba(0,102,255,.04);border:1.5px solid rgba(0,102,255,.18);border-radius:var(--radius);padding:18px 22px;font-size:15px;color:var(--text);display:flex;gap:12px;line-height:1.7;margin-top:24px}.legacy-content .takeaway b {color:var(--accent)}

.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)}