@keyframes _si{to{opacity:1}}

.legacy-content .arch-diagram {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);padding:28px;margin:16px 0;box-shadow:var(--shadow-card)}.legacy-content .arch-diagram .arch-title {font-size:13px;font-weight:700;color:var(--sub);text-align:center;margin-bottom:20px}.legacy-content .arch-row {display:flex;align-items:stretch;gap:20px;justify-content:center;flex-wrap:wrap}.legacy-content .arch-box {flex:1;min-width:220px;max-width:380px;border-radius:var(--radius);padding:20px 22px;display:flex;flex-direction:column;gap:10px}.legacy-content .arch-box.init {background:rgba(0,102,255,.04);border:1.5px solid rgba(0,102,255,.2)}.legacy-content .arch-box.coding {background:rgba(124,58,237,.04);border:1.5px solid rgba(124,58,237,.2)}.legacy-content .arch-box .ab-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 .arch-box.init .ab-badge {background:rgba(0,102,255,.1);color:var(--accent)}.legacy-content .arch-box.coding .ab-badge {background:rgba(124,58,237,.1);color:var(--purple)}.legacy-content .arch-box .ab-title {font-size:16px;font-weight:800;color:var(--text)}.legacy-content .arch-box .ab-desc {font-size:13px;color:var(--sub);line-height:1.6}.legacy-content .arch-box .ab-tasks {list-style:none;padding:0;margin:6px 0 0}.legacy-content .arch-box .ab-tasks li {font-size:13px;color:var(--text);padding:6px 0;border-bottom:1px solid var(--border);display:flex;align-items:flex-start;gap:8px;line-height:1.6}.legacy-content .arch-box .ab-tasks li:last-child {border-bottom:none}.legacy-content .arch-box .ab-tasks .task-dot {flex-shrink:0;width:6px;height:6px;border-radius:50%;margin-top:7px}.legacy-content .arch-box.init .ab-tasks .task-dot {background:var(--accent)}.legacy-content .arch-box.coding .ab-tasks .task-dot {background:var(--purple)}.legacy-content .arch-arrow {display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--sub)}@media(max-width:768px){.legacy-content .arch-arrow {transform:rotate(90deg);align-self:center}}.legacy-content .code-block {background:var(--surface-soft);border-radius:var(--radius);padding:20px 24px;margin:16px 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 .principle-list {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 .principle-list .pl-title {font-size:16px;font-weight:800;color:var(--text);margin-bottom:14px;display:flex;align-items:center;gap:10px}.legacy-content .principle-list .pl-title svg {color:var(--accent)}.legacy-content .principle-list .pl-items {list-style:none;padding:0}.legacy-content .principle-list .pl-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 .principle-list .pl-items li:last-child {border-bottom:none}.legacy-content .principle-list .pl-items .pl-num {flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--accent);color:#fff;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}.legacy-content .result-box {background:rgba(22,163,106,.04);border:1.5px solid rgba(22,163,106,.2);border-radius:var(--radius);padding:20px 24px;margin:16px 0;display:flex;gap:14px;align-items:flex-start}.legacy-content .result-box .r-icon {flex-shrink:0;width:40px;height:40px;border-radius:10px;background:rgba(22,163,106,.08);display:flex;align-items:center;justify-content:center;color:var(--success)}.legacy-content .result-box .r-content {flex:1}.legacy-content .result-box .r-title {font-size:15px;font-weight:800;color:var(--success);margin-bottom:4px}.legacy-content .result-box .r-desc {font-size:14px;color:var(--text);line-height:1.8}.legacy-content .warn-inline {background:rgba(217,119,6,.04);border:1.5px solid rgba(217,119,6,.18);border-radius:var(--radius);padding:16px 20px;margin:16px 0;font-size:14px;color:var(--text);line-height:1.7;display:flex;gap:12px;align-items:flex-start}.legacy-content .warn-inline svg {flex-shrink:0;color:var(--amber);margin-top:2px}.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)}