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24px),transparent);mask-image:linear-gradient(90deg,transparent,#000 24px,#000 calc(100% - 24px),transparent)}.chap-strip[data-astro-cid-m5g3xjsf].at-start{-webkit-mask-image:linear-gradient(90deg,#000,#000 calc(100% - 24px),transparent);mask-image:linear-gradient(90deg,#000,#000 calc(100% - 24px),transparent)}.chap-strip[data-astro-cid-m5g3xjsf].at-end{-webkit-mask-image:linear-gradient(90deg,transparent,#000 24px,#000);mask-image:linear-gradient(90deg,transparent,#000 24px,#000)}.chap-strip[data-astro-cid-m5g3xjsf].at-start.at-end{-webkit-mask-image:none;mask-image:none}.chap[data-astro-cid-m5g3xjsf]{padding-top:calc(var(--nav-h) + 20px)}.chap-banner[data-astro-cid-m5g3xjsf] img[data-astro-cid-m5g3xjsf]{aspect-ratio:16 / 7}.chap-head[data-astro-cid-m5g3xjsf]{margin-bottom:20px}.chap-topic[data-astro-cid-m5g3xjsf]{padding:20px 18px}.chap-icons[data-astro-cid-m5g3xjsf]{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.chap-icons[data-astro-cid-m5g3xjsf] figure[data-astro-cid-m5g3xjsf]{width:auto}.chap-icons[data-astro-cid-m5g3xjsf] img[data-astro-cid-m5g3xjsf]{width:100%;aspect-ratio:1;height:auto}.chap-nav[data-astro-cid-m5g3xjsf]{flex-direction:column;gap:10px}.chap-nav[data-astro-cid-m5g3xjsf] a[data-astro-cid-m5g3xjsf]{display:block;padding:14px 16px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface)}.chap-nav[data-astro-cid-m5g3xjsf] a[data-astro-cid-m5g3xjsf]:last-child:not(:only-child){text-align:right}}