/* EPUB 阅读器 */
.ep-toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}
.ep-group{display:flex;align-items:center;gap:.25rem;padding-right:.5rem;border-right:1px solid #edf0f4}
.ep-group:last-child{border-right:0}
.ep-theme.is-on{background:var(--site-primary,#0f172a);border-color:var(--site-primary,#0f172a);color:#fff}
.ep-layout{display:grid;grid-template-columns:16rem 1fr;gap:.75rem;align-items:start}
.ep-toc-card,.ep-read-card{margin-bottom:0}
.ep-toc{max-height:42rem;overflow:auto;padding:.5rem}
.ep-toc-item{display:block;width:100%;text-align:left;border:0;background:transparent;color:#334155;font-size:.8125rem;
  padding:.35rem .5rem;border-radius:.35rem;cursor:pointer;line-height:1.5}
.ep-toc-item:hover{background:#f1f5f9;color:var(--site-primary,#0f172a)}
.ep-toc-item.is-on{background:var(--site-tint,#f1f5f9);color:var(--site-primary,#0f172a);font-weight:600}
.ep-book{font-size:.9375rem;font-weight:700;color:#1f2d3d;max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ep-reader{height:42rem;overflow:auto;padding:2rem 2.25rem;outline:none;font-size:18px;line-height:1.8;
  transition:background .15s linear,color .15s linear}
.ep-reader img,.ep-reader svg{max-width:100%;height:auto}
.ep-reader p{margin:0 0 .85em}
.ep-reader h1,.ep-reader h2,.ep-reader h3{margin:.8em 0 .5em;line-height:1.35}
.ep-reader blockquote{margin:.8em 0;padding:.3em 1em;border-left:3px solid currentColor;opacity:.85}
.ep-reader table{border-collapse:collapse;margin:.6em 0;max-width:100%}
.ep-reader td,.ep-reader th{border:1px solid rgba(120,130,140,.4);padding:.3em .5em}
.ep-reader.theme-light{background:#fff;color:#1f2933}
.ep-reader.theme-sepia{background:#f8f1e3;color:#4b3a24}
.ep-reader.theme-dark{background:#111827;color:#d7dce4}
.ep-reader.theme-dark a{color:#8ab4f8}
@media (max-width:991.98px){
  .ep-layout{grid-template-columns:1fr}
  .ep-toc{max-height:12rem}
  .ep-reader{height:auto;min-height:24rem;padding:1.25rem 1rem}
}