@keyframes _si{to{opacity:1}}

.legacy-content .lesson-header {position:relative;overflow:hidden}.legacy-content .lesson-header:after {content:"";position:absolute;right:-70px;top:-70px;width:220px;height:220px;border:1px solid rgba(77,107,254,.22);border-radius:50%;box-shadow:0 0 0 26px rgba(77,107,254,.04),0 0 0 52px rgba(77,107,254,.025)}.legacy-content .lesson>p {font-size:15px;line-height:2;margin:0 0 20px}.legacy-content .lesson .sec-label {margin:56px 0 20px}.legacy-content .objective {display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:center;background:var(--accent-soft);border:1px solid rgba(77,107,254,.28);border-radius:var(--radius);padding:24px;margin:18px 0 32px}.legacy-content .objective svg {color:var(--accent)}.legacy-content .objective b {display:block;color:var(--accent);margin-bottom:6px}.legacy-content .objective span {font-size:14px;line-height:1.9;color:var(--text)}.legacy-content .keypoint {margin:32px 0;padding:22px 24px;border-radius:16px;background:var(--accent-soft);border:1px solid rgba(77,107,254,.25);text-align:center;font-size:18px;font-weight:800;color:var(--accent-deep);line-height:1.8}.legacy-content .srcnote {font-size:12px;color:var(--sub);line-height:1.8;margin:0 0 20px}.legacy-content .visual {background:var(--bg);border:1px solid rgba(77,107,254,.25);border-radius:18px;padding:24px;box-shadow:var(--shadow-card);margin:0 0 20px}.legacy-content .visual svg {width:100%;height:auto;display:block}.legacy-content .visual-caption {font-size:12px;color:var(--sub);text-align:center;margin-top:12px}.legacy-content .sem-card {background:var(--card);border:1px solid var(--border);border-radius:16px;padding:24px;box-shadow:var(--shadow-card);margin:0 0 20px}.legacy-content .sem-card h3 {display:flex;align-items:center;gap:10px;margin:0;font-size:16px;color:var(--text)}.legacy-content .sem-card h3 code {color:var(--accent);font-weight:800;font-size:15px}.legacy-content .sem-card h3 small {font-size:13px;font-weight:600;color:var(--sub)}.legacy-content .sem-card h3 svg {color:var(--accent);flex:0 0 auto}.legacy-content .sem-grid {display:grid;grid-template-columns:1fr 1fr;gap:16px 28px;margin-top:18px}.legacy-content .sem-item b {display:block;font-size:12px;font-weight:800;letter-spacing:.4px;color:var(--accent-deep);margin-bottom:5px}.legacy-content .sem-item span {font-size:14px;line-height:1.9;color:var(--sub)}.legacy-content .sem-say {grid-column:1/-1;background:var(--accent-soft);border:1px solid rgba(77,107,254,.2);border-radius:10px;padding:12px 16px;font-size:14px;line-height:1.9;color:var(--text)}.legacy-content .exercise {display:grid;grid-template-columns:52px 1fr;gap:18px;background:var(--accent-soft);border:1px solid rgba(77,107,254,.3);border-radius:16px;padding:24px;margin-top:12px}.legacy-content .exercise-num {width:46px;height:46px;border-radius:12px;background:var(--accent);color:white;display:grid;place-items:center;font-weight:900}.legacy-content .exercise h3 {margin:0 0 8px;color:var(--text);font-size:16px}.legacy-content .exercise p {margin:0;color:var(--sub);font-size:14px;line-height:1.9}.legacy-content .takeaway {margin-top:32px;padding:24px;border-radius:16px;background:var(--accent-soft);border:1px solid rgba(77,107,254,.28);color:var(--text);display:flex;gap:14px;line-height:1.9;font-size:14px}.legacy-content .takeaway svg {flex:0 0 auto;color:var(--accent)}.legacy-content .takeaway b {color:var(--accent-deep)}.legacy-content .cmp {display:grid;grid-template-columns:1fr;gap:20px;margin-top:20px}.legacy-content .cmp-card {background:var(--card);border:1px solid var(--border);border-radius:16px;padding:24px;box-shadow:var(--shadow-card)}.legacy-content .cmp-card h3 {font-size:16px;margin:0 0 12px;color:var(--text)}.legacy-content .cmp-card h3 em {font-style:normal;color:var(--accent);font-size:12px;display:block;font-weight:700;letter-spacing:.6px;text-transform:uppercase;margin-bottom:6px}.legacy-content .cmp-card p {font-size:14px;line-height:1.9;color:var(--sub);margin:0 0 10px}.legacy-content .cmp-card p:last-child {margin-bottom:0}.legacy-content .demo {background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-card);padding:24px;margin-top:14px}.legacy-content .demo-toolbar {display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-bottom:18px}.legacy-content .demo-toolbar .gap {flex:1}.legacy-content .dbtn {display:inline-flex;align-items:center;gap:10px;min-height:54px;padding:10px 18px;border-radius:12px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:14px;font-weight:700;cursor:pointer;font-family:inherit;transition:transform .12s,box-shadow .12s,border-color .12s}.legacy-content .dbtn:hover {transform:translateY(-1px);border-color:rgba(77,107,254,.45);box-shadow:0 4px 12px rgba(77,107,254,.12)}.legacy-content .dbtn:active {transform:translateY(0)}.legacy-content .dbtn svg {flex:0 0 auto}.legacy-content .dbtn .bt {display:flex;flex-direction:column;align-items:flex-start;line-height:1.4;text-align:left}.legacy-content .dbtn .bt small {font-size:11px;font-weight:600;opacity:.72}.legacy-content .dbtn.b-followup {border-color:rgba(77,107,254,.5);color:var(--accent-deep)}.legacy-content .dbtn.b-steer {border-color:rgba(217,119,6,.5);color:var(--amber)}.legacy-content .dbtn.b-inject {border-color:rgba(8,145,178,.5);color:var(--cyan)}.legacy-content .dbtn.b-abort {border-color:rgba(220,38,38,.45);color:var(--danger)}.legacy-content .dbtn.b-ctl {color:var(--sub)}.legacy-content .d-status {display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:800;padding:8px 14px;border-radius:999px;border:1px solid var(--border);color:var(--sub)}.legacy-content .d-status .dot {width:9px;height:9px;border-radius:50%;background:#c4c8cf}.legacy-content .d-status.running {color:var(--accent-deep);border-color:rgba(77,107,254,.4)}.legacy-content .d-status.running .dot {background:var(--accent);animation:dpulse 1.1s ease infinite}@keyframes dpulse{50%{opacity:.35}}.legacy-content .lane-wrap {overflow-x:auto;padding:18px 8px;background:var(--bg);border:1px solid var(--border);border-radius:14px}.legacy-content .lane {display:flex;align-items:stretch;gap:16px;min-height:158px;padding:8px 12px;width:max-content;min-width:100%}.legacy-content .d-turn {border:1.5px solid rgba(77,107,254,.4);border-radius:14px;padding:12px 14px;background:var(--card);display:flex;gap:12px;align-items:stretch;position:relative}.legacy-content .d-turn.done {opacity:.55;border-style:dashed}.legacy-content .d-turn.aborted {border-color:rgba(220,38,38,.5)}.legacy-content .d-turn-tag {position:absolute;top:-10px;left:12px;background:var(--accent);color:#fff;font-size:10px;font-weight:800;letter-spacing:.6px;padding:2px 9px;border-radius:999px}.legacy-content .d-turn.aborted .d-turn-tag {background:var(--danger)}.legacy-content .d-step {width:126px;border:1px solid var(--border);border-radius:12px;background:var(--bg);padding:10px 11px;display:flex;flex-direction:column;gap:7px}.legacy-content .d-step .s-name {font-size:12px;font-weight:800;color:var(--text)}.legacy-content .d-step .s-bar {height:5px;border-radius:3px;background:rgba(77,107,254,.15);overflow:hidden}.legacy-content .d-step .s-bar i {display:block;height:100%;width:0;background:var(--accent);border-radius:3px}.legacy-content .d-step.running .s-bar i {animation:dfill linear forwards}@keyframes dfill{to{width:100%}}.legacy-content .d-step.done .s-bar i {width:100%;background:var(--success)}.legacy-content .d-step.aborted .s-bar i {width:60%;background:var(--danger)}.legacy-content .d-step.aborted .s-name {color:var(--danger)}.legacy-content .d-step .s-src {font-size:10.5px;color:var(--sub);line-height:1.6}.legacy-content .d-queue {border:1.5px dashed rgba(77,107,254,.45);border-radius:14px;padding:12px 14px;min-width:164px;display:flex;flex-direction:column;gap:8px;background:rgba(77,107,254,.03)}.legacy-content .d-queue .q-name {font-size:11px;font-weight:800;letter-spacing:.4px;color:var(--accent-deep);line-height:1.6}.legacy-content .d-queue .q-name small {display:block;font-weight:600;color:var(--sub);letter-spacing:0}.legacy-content .d-queue.q-step {border-color:rgba(217,119,6,.45)}.legacy-content .d-queue.q-step .q-name {color:var(--amber)}.legacy-content .d-queue.flash {animation:qflash .7s ease 2}@keyframes qflash{50%{background:rgba(77,107,254,.18);box-shadow:0 0 0 4px rgba(77,107,254,.12)}}.legacy-content .msg-card {border-radius:9px;padding:6px 10px;font-size:11.5px;font-weight:700;line-height:1.6;border:1px solid var(--border);background:var(--card);animation:flyin .5s cubic-bezier(.2,.9,.3,1.2)}@keyframes flyin{from{opacity:0;transform:translateY(-26px) scale(.6)}to{opacity:1;transform:none}}.legacy-content .msg-card.m-followup {border-color:rgba(77,107,254,.55);color:var(--accent-deep)}.legacy-content .msg-card.m-steer {border-color:rgba(217,119,6,.55);color:var(--amber)}.legacy-content .msg-card.m-inject {border-color:rgba(8,145,178,.55);color:var(--cyan);border-style:dashed}.legacy-content .msg-card.m-seed {color:var(--sub)}.legacy-content .msg-card .badge {display:inline-block;margin-left:5px;background:var(--danger);color:#fff;border-radius:5px;font-size:9px;padding:0 5px}.legacy-content .msg-card.ghost {opacity:.4;text-decoration:line-through}.legacy-content .d-caption {display:flex;gap:12px;align-items:flex-start;margin-top:16px;padding:16px 18px;border-radius:12px;background:var(--accent-soft);border:1px solid rgba(77,107,254,.25);min-height:54px}.legacy-content .d-caption svg {flex:0 0 auto;color:var(--accent);margin-top:2px}.legacy-content .d-caption p {margin:0;font-size:14px;line-height:1.8;color:var(--text);font-weight:600}.legacy-content .d-log {background:var(--bg);border:1px solid var(--border);border-radius:14px;padding:14px 16px;overflow-y:auto;max-height:168px;margin-top:16px}.legacy-content .d-log .t {font-size:10px;font-weight:800;letter-spacing:.7px;text-transform:uppercase;color:var(--sub);margin-bottom:8px}.legacy-content .d-log .le {font-size:12.5px;line-height:1.7;padding:5px 10px;border-radius:8px;margin-bottom:5px;border:1px solid transparent;animation:flyin .3s ease}.legacy-content .d-log .le.sys {color:var(--sub)}.legacy-content .d-log .le.turn {color:var(--accent-deep);background:rgba(77,107,254,.07)}.legacy-content .d-log .le.step {color:var(--text)}.legacy-content .d-log .le.claim {color:var(--amber);background:rgba(217,119,6,.07)}.legacy-content .d-log .le.abort {color:var(--danger);background:rgba(220,38,38,.06)}.legacy-content .demo-hint {font-size:12px;color:var(--sub);margin-top:14px;line-height:1.8}@media(max-width:760px){.legacy-content .sem-grid {grid-template-columns:1fr}.legacy-content .objective {grid-template-columns:1fr}.legacy-content .exercise {grid-template-columns:1fr}.legacy-content .lesson-header:after {display:none}.legacy-content .dbtn {flex:1 1 44%;justify-content:center}.legacy-content .d-log {max-height:140px}.legacy-content .visual {padding:14px}.legacy-content .keypoint {font-size:16px}}

.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)}