.osz-art{max-width:760px;margin:0 auto;font-size:17px;line-height:1.85;color:#1f2937;word-break:keep-all;}
.osz-art p{margin:0 0 1.15em;}
.osz-art h2{font-size:1.4em;font-weight:800;color:#1d4ed8;margin:2em 0 .7em;padding-left:.55em;border-left:6px solid #3b82f6;line-height:1.4;}
.osz-art h3{font-size:1.12em;font-weight:700;color:#1e3a8a;margin:1.5em 0 .5em;}
.osz-art .lead{font-size:1.05em;color:#334155;background:#eff6ff;border-radius:14px;padding:18px 20px;margin:0 0 1.6em;}
.osz-art figure.of{margin:1.6em 0;text-align:center;}
.osz-art figure.of img{width:100%;height:auto;border-radius:16px;display:block;
  box-shadow:0 8px 24px rgba(29,78,216,.13);transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s;}
.osz-art figure.of img:hover{transform:translateY(-8px) scale(1.012);box-shadow:0 20px 40px rgba(29,78,216,.26);}
.osz-art figure.of figcaption{font-size:.86em;color:#64748b;margin-top:.6em;}
.osz-art .callout{background:linear-gradient(135deg,#eff6ff,#ecfeff);border:1px solid #bfdbfe;
  border-radius:16px;padding:18px 20px;margin:1.7em 0;}
.osz-art .callout b{color:#1d4ed8;}
.osz-art table.ot{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:.96em;
  border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.06);}
.osz-art table.ot th,.osz-art table.ot td{padding:11px 9px;text-align:center;border-bottom:1px solid #e2e8f0;}
.osz-art table.ot thead th{background:#1d4ed8;color:#fff;font-weight:700;}
.osz-art table.ot tbody tr:nth-child(even){background:#f8fafc;}
.osz-art table.ot tbody tr:hover{background:#eff6ff;}
.osz-art .keyrow td{font-weight:800;color:#1d4ed8;background:#dbeafe !important;}
.osz-art .faq details{border:1px solid #cbd5e1;border-radius:12px;padding:4px 16px;margin:.7em 0;background:#fff;
  transition:transform .3s,box-shadow .3s;}
.osz-art .faq details:hover{transform:translateY(-4px);box-shadow:0 12px 26px rgba(29,78,216,.14);}
.osz-art .faq summary{font-weight:700;color:#1e3a8a;cursor:pointer;padding:10px 0;}
.osz-art .faq p{margin:.3em 0 1em;color:#374151;}
.osz-art .related{margin:2.3em 0 .5em;}
.osz-art .related h2{border:0;padding:0;color:#0f172a;}
.osz-art .relgrid{display:grid;grid-template-columns:1fr 1fr;gap:13px;}
.osz-art .relgrid a{display:block;text-decoration:none;background:#fff;border:1px solid #e2e8f0;border-radius:14px;
  padding:15px 17px;color:#1d4ed8;font-weight:700;line-height:1.45;
  transition:transform .32s cubic-bezier(.2,.8,.2,1),box-shadow .32s,border-color .32s;}
.osz-art .relgrid a:hover{transform:translateY(-7px);box-shadow:0 16px 32px rgba(29,78,216,.2);border-color:#3b82f6;}
.osz-art .relgrid a span{display:block;font-size:.8em;color:#94a3b8;font-weight:600;margin-bottom:4px;}
.osz-art .note{font-size:.85em;color:#94a3b8;border-top:1px dashed #cbd5e1;margin-top:2.3em;padding-top:1em;}
@media(max-width:520px){.osz-art .relgrid{grid-template-columns:1fr;}.osz-art{font-size:16px;}}