.mi-hero{align-items:flex-start;gap:16px;margin-bottom:8px;display:flex}.mi-hero h1{margin:0 0 6px;font-size:clamp(1.3rem,3vw,1.8rem)}.mi-hero p{color:var(--muted);margin:0;font-size:.95rem}.mi-grid{grid-template-columns:1.4fr 1fr;align-items:start;gap:24px;margin-top:22px;display:grid}.mi-sec{margin-bottom:26px}.mi-sec h2{margin-bottom:10px;font-size:1.05rem}.mi-sec ul{margin:0;padding-left:20px}.mi-sec li{color:var(--body);margin-bottom:.5em;font-size:.9rem;line-height:1.6}.mi-sec p{color:var(--body);font-size:.92rem}.letter-wrap{position:relative}.letter-pre{background:var(--bg);border:1px solid var(--line);color:var(--ink);white-space:pre-wrap;border-radius:12px;max-height:420px;margin:0 0 12px;padding:18px 20px;font-family:Courier New,monospace;font-size:.83rem;line-height:1.7;overflow-y:auto}.envelope{border:2px solid var(--ink);aspect-ratio:16/9.5;background:#fdfaf2;border-radius:6px;flex-direction:column;justify-content:flex-end;max-width:420px;padding:24px;display:flex;position:relative}.envelope:before{content:"";border:1.5px dashed var(--faint);width:56px;height:44px;position:absolute;top:16px;left:16px}.env-stamp-label{color:var(--faint);text-align:center;width:44px;font-size:.6rem;position:absolute;top:20px;left:22px}.env-addr{color:var(--ink);font-size:.86rem;line-height:1.55}.env-addr b{text-transform:uppercase;letter-spacing:.06em;color:var(--faint);margin-bottom:4px;font-size:.68rem;font-weight:800;display:block}.checklist{margin:0;padding:0;list-style:none}.checklist li{border-top:1px solid var(--line-soft);align-items:flex-start;gap:10px;padding:9px 0;font-size:.88rem;display:flex}.checklist li:first-child{border-top:0}.checklist .chk-box{border:1.5px solid var(--line);border-radius:5px;flex:none;width:18px;height:18px;margin-top:1px}.mi-side{position:sticky;top:80px}.stat-mini{flex-wrap:wrap;gap:18px;margin:14px 0 4px;display:flex}.stat-mini .sm{flex-direction:column;display:flex}.stat-mini .sm b{color:var(--ink);font-size:1.15rem}.stat-mini .sm span{color:var(--muted);font-size:.74rem}.mi-hub-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin-top:20px;display:grid}.mi-hub-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);color:inherit;align-items:center;gap:12px;padding:16px 18px;display:flex}.mi-hub-card:hover{border-color:var(--navy);text-decoration:none}.mi-hub-card b{color:var(--ink);font-size:.92rem;display:block}.mi-hub-card span{color:var(--muted);font-size:.78rem}@media (max-width:900px){.mi-grid{grid-template-columns:1fr}.mi-side{position:static}}@media (max-width:640px){.mi-hero{gap:12px}.letter-pre{overflow-wrap:anywhere;max-height:320px;padding:14px 16px;font-size:.8rem}.env-stamp-label{width:40px;font-size:.75rem}.env-addr b{font-size:.75rem}.envelope{padding:18px}.mi-side .card{padding:16px}}