.paper-box-net{max-width:var(--reading-width);border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);margin:22px 0;padding:16px 12px}.paper-box-net svg{width:100%;max-width:520px;height:auto;margin-inline:auto;display:block}.paper-box-net svg text{font-family:var(--font-body);text-anchor:middle;dominant-baseline:middle;fill:var(--ink);font-size:20px}.paper-box-net-dimension path{fill:none;stroke:var(--line-strong);stroke-width:1.3px}.paper-box-net-paper{fill:var(--surface)}.paper-box-net-walls{fill:var(--accent-soft)}.paper-box-net-bottom{fill:var(--highlight)}.paper-box-net-corner{fill:var(--line)}.paper-box-net-fold{stroke:var(--accent);stroke-width:1.7px;stroke-dasharray:5 4}.paper-box-net-outline{fill:none;stroke:var(--ink);stroke-width:2px}.paper-box-net svg .paper-box-net-base-title{font-size:24px;font-weight:650}.paper-box-net-parts{font-weight:600}.paper-box-net figcaption{color:var(--muted);padding:10px 6px 0;font-size:13px;line-height:1.8}.paper-box-net figcaption p{margin:8px 0 0}.paper-box-net-equations{color:var(--ink);flex-wrap:wrap;gap:4px 24px;font-size:15px;font-weight:600;display:flex}@media (width<=420px){.paper-box-net{padding-inline:5px}.paper-box-net figcaption{padding-inline:7px}}