.sf-external-knowledge{margin:24px 0;padding:24px;border:1px solid #dbe4f0;border-radius:24px;background:linear-gradient(135deg,#fff,#f8fafc);box-shadow:0 18px 48px rgba(16,36,62,.05)}
.sf-external-kicker{font-size:12px;font-weight:1000;letter-spacing:.14em;color:#0e5f8d;margin-bottom:8px}
.sf-external-knowledge h2{margin:0 0 10px;font-size:28px;line-height:1.2;color:#10243e}
.sf-external-lead{margin:0;color:#64748b;line-height:1.8}
.sf-external-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
.sf-external-card{border:1px solid #e2e8f0;border-radius:18px;background:#fff;padding:14px;min-height:88px;display:flex;align-items:flex-start}
.sf-external-card strong{font-size:15px;line-height:1.55;color:#10243e}
.sf-external-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.sf-external-tags span{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#eff6ff;border:1px solid #dbeafe;color:#1d4ed8;font-size:12px;font-weight:800}
.sf-external-sources{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px}
.sf-external-source{border:1px dashed #dbe4f0;border-radius:16px;background:#fff;padding:12px}
.sf-external-source b{display:block;color:#10243e;font-size:14px}
.sf-external-source span{display:block;margin-top:6px;color:#64748b;font-size:12px;line-height:1.5}
.sf-external-faq{display:grid;gap:10px;margin-top:16px}
.sf-external-faq details{border:1px solid #e2e8f0;border-radius:16px;background:#fff;padding:14px}
.sf-external-faq summary{cursor:pointer;font-weight:900;color:#10243e}
.sf-external-faq p{margin:10px 0 0;color:#64748b;line-height:1.75}
@media(max-width:900px){.sf-external-grid,.sf-external-sources{grid-template-columns:1fr}}
</style>