:root{--bg:#ffffff;--bg2:#f5f6f8;--bg3:#ebedf2;--surface:#eef0f4;--surface2:#e2e5eb;--border:#0000000f;--border2:#00000018;--text:#1a1c24;--text-muted:#3d4254;--text-dim:#6b7289;--heading:#0e0f11;--nav-bg:rgba(255,255,255,.92);--panel-shadow:0 16px 40px rgba(0,0,0,.1);--hero-grad-1:#ff6b3514;--hero-grad-2:#4a9eff10;--quick-answer-bg:linear-gradient(135deg,#ff6b3518,#f0b4290c);--accent:#ff6b35;--accent2:#ff8c5a;--accent-pale:#ff6b3518;--accent-border:#ff6b3540;--blue:#3d8eef;--blue-pale:#3d8eef14;--green:#2db872;--green-pale:#2db87214;--gold:#d9a020;--gold-pale:#d9a02014;--red:#e04545;--red-pale:#e0454514;--on-accent:#ffffff;--serif:Georgia,"Times New Roman",Times,serif;--sans:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--cond:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica 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li:last-child{border-bottom:none}.checklist li:before{content:"✓";color:var(--green);font-weight:700;font-size:.85rem;flex-shrink:0;margin-top:2px;background:var(--green-pale);width:20px;height:20px;display:flex;align-items:center;justify-content:center;font-size:.7rem}.shutter-sim{background:var(--bg3);border:1px solid var(--border2);padding:32px;margin:28px 0}.sim-title{font-family:var(--cond);font-size:.75rem;font-weight:700;letter-spacing:.15em;text-transform:uppercase;color:var(--text-dim);margin-bottom:20px}.sim-row{display:flex;align-items:center;gap:16px;margin-bottom:12px}.sim-speed{font-family:var(--cond);font-weight:700;color:var(--heading);font-size:.9rem;min-width:70px}.sim-bar-wrap{flex:1;height:8px;background:var(--surface);border-radius:0}.sim-bar{height:8px;border-radius:0;transition:width .4s}.sim-label{font-size:.78rem;color:var(--text-dim);min-width:110px;text-align:right}.faq-list{margin:28px 0}.faq-item{border-bottom:1px solid var(--border)}.faq-q{padding:18px 0;display:flex;justify-content:space-between;align-items:center;cursor:pointer;gap:16px;user-select:none}.faq-q-text{font-family:var(--sans);font-size:1.0625rem;font-weight:600;color:var(--heading)}.faq-icon{width:22px;height:22px;border:1px solid var(--border2);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--text-dim);font-size:.8rem;transition:transform .25s,border-color .25s}.faq-item.open .faq-icon{transform:rotate(45deg);border-color:var(--accent);color:var(--accent)}.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}.faq-item.open .faq-a{max-height:400px}.faq-a-inner{padding:0 0 20px;font-size:1.0625rem;color:var(--text);line-height:1.8}.ladder{margin:28px 0;position:relative;padding-left:28px}.ladder:before{content:"";position:absolute;left:7px;top:0;bottom:0;width:1px;background:var(--border2)}.ladder-item{position:relative;margin-bottom:24px}.ladder-item:before{content:"";position:absolute;left:-24px;top:6px;width:12px;height:12px;border-radius:50%;border:2px solid var(--accent);background:var(--bg)}.ladder-item.done:before{background:var(--accent)}.ladder-num{font-family:var(--cond);font-size:.7rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:4px}.ladder-text{font-size:1.0625rem;color:var(--text);line-height:1.7}.ladder-text strong{color:var(--text)}.anatomy{background:var(--bg2);border:1px solid var(--border2);padding:36px;margin:28px 0;display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}.anatomy-diagram{background:var(--bg3);border:1px solid var(--border);padding:28px;display:flex;align-items:center;justify-content:center;min-height:240px}.anatomy-diagram svg{opacity:.9}.anatomy-points{list-style:none}.anatomy-points li{display:flex;align-items:flex-start;gap:10px;padding:10px 0;border-bottom:1px solid var(--border);font-size:1rem;color:var(--text);line-height:1.65}.anatomy-points li:last-child{border-bottom:none}.ap-num{font-family:var(--cond);font-weight:700;color:var(--accent);min-width:20px;font-size:.9rem}@media(max-width:700px){.anatomy{grid-template-columns:1fr}}.final-box{background:linear-gradient(135deg,var(--bg2),var(--bg3));border:1px solid var(--border2);padding:48px;margin-top:60px}.final-box h2{margin-bottom:32px}.checklist-grid{display:grid;grid-template-columns:1fr 1fr;gap:0}@media(max-width:600px){.checklist-grid{grid-template-columns:1fr}}footer{background:var(--bg);border-top:1px solid var(--border);padding:40px 60px;text-align:center}.footer-copy{font-size:13px;color:var(--text-dim);margin-bottom:16px}.footer-copy span{color:var(--accent);font-weight:600}.footer-links{display:flex;gap:24px;justify-content:center;flex-wrap:wrap}.footer-links a{font-size:13px;font-weight:600;color:var(--text-muted);text-decoration:none;transition:color .2s}.footer-links a:hover{color:var(--heading)}@media(max-width:720px){footer{padding:32px 24px}}.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}.reveal.visible{opacity:1;transform:none}.tag{display:inline-block;background:var(--surface);color:var(--text-dim);font-family:var(--cond);font-size:10px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:2px 8px;border:1px solid var(--border2);margin:2px}.exp-box{background:var(--bg2);border:1px solid var(--border2);border-left:3px solid var(--gold);padding:24px 28px;margin:32px 0}.exp-box .exp-title{font-family:var(--cond);font-size:.7rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);margin-bottom:10px}.exp-box p{font-size:1rem;font-style:normal;margin:0;line-height:1.75;color:var(--text)}.sp{height:40px}