/* Native migrated content inside the captured design; keep the approved site header/footer. */
.bs-static-beta,.bs-static-preview-article{max-width:none;margin:0;padding:0}
.bs-historical-rd{--sans:"MiSans",-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;--serif:var(--sans)}
.bs-historical-rd img{max-width:100%}
.bs-historical-rd .thumb{position:relative;overflow:hidden}
.bs-historical-rd .thumb-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;z-index:1}
.bs-historical-rd .thumb.r-169{aspect-ratio:16/9;height:auto}
.bs-historical-rd .cover{overflow:hidden;border-radius:8px}
.bs-historical-rd .boards,.bs-historical-rd .icards,.bs-historical-rd .methods{grid-template-columns:repeat(var(--bs-columns,4),minmax(0,1fr))}
.bs-historical-rd .boards>* ,.bs-historical-rd .icards>* ,.bs-historical-rd .methods>* ,.bs-historical-rd .abody>* ,.bs-historical-rd .latest>*{min-width:0}
.bs-historical-rd .atags a{display:inline-flex;align-items:center;min-height:44px}
.bs-historical-rd .prose{overflow-wrap:anywhere}
.bs-historical-rd .prose img{height:auto}
.bs-historical-rd .board .arr{display:none}
.bs-historical-rd .ctas .btn{height:44px;min-height:44px;padding:0 20px;display:inline-flex;align-items:center;justify-content:center}
.bs-historical-rd .hero h1{text-align:left}
.bs-historical-rd .hero h1 .em{display:inline-block}
@media(max-width:800px){.bs-historical-rd .boards,.bs-historical-rd .icards,.bs-historical-rd .methods{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.bs-historical-rd .boards,.bs-historical-rd .icards,.bs-historical-rd .methods{grid-template-columns:minmax(0,1fr)}.bs-historical-rd .hero h1{overflow-wrap:anywhere}.bs-historical-rd .atags{gap:8px}}
@media(prefers-reduced-motion:reduce){.bs-historical-rd *{animation:none!important;scroll-behavior:auto!important;transition:none!important}}