.page_page__2XXuO{width:min(1100px,calc(100% - 32px));margin:0 auto;padding:42px 0 72px}.page_breadcrumbs__gr8OM{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px;color:#68758a;font-size:14px}.page_breadcrumbs__gr8OM a{color:#315fd6;text-decoration:none}.page_hero__wrsNH{padding:28px;border:1px solid #e2e8f2;border-radius:24px;background:linear-gradient(145deg,#f8fbff,#fff 70%)}.page_hero__wrsNH>span{color:#315fd6;font-weight:800}.page_hero__wrsNH h1{margin:8px 0 10px;color:#172033;font-size:clamp(28px,4vw,46px);line-height:1.08}.page_hero__wrsNH p{max-width:760px;margin:0;color:#526071;font-size:17px;line-height:1.6}.page_stats__8moVe{display:flex;align-items:baseline;flex-wrap:wrap;gap:5px 8px;width:fit-content;margin-top:18px;padding:10px 13px;border:1px solid #d9e5f8;border-radius:13px;background:#f3f7ff;color:#274b9f}.page_stats__8moVe strong{font-size:21px}.page_stats__8moVe span{font-size:14px;font-weight:850}.page_stats__8moVe small{color:#68758a;font-size:12px}.page_actions__d0VBL{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.page_actions__d0VBL a{display:inline-flex;min-height:44px;align-items:center;border-radius:999px;padding:0 16px;background:#1f5eff;color:#fff;font-weight:800;text-decoration:none}.page_actions__d0VBL a+a{background:#eef3ff;color:#234fb8}.page_content__dun83{margin-top:30px}.page_sectionIntro__6OYPr{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:15px}.page_sectionIntro__6OYPr h2{margin:0 0 6px;color:#172033;font-size:25px}.page_sectionIntro__6OYPr p{max-width:720px;margin:0;color:#677386;line-height:1.5}.page_pageGroups__fOAEX{display:grid;gap:10px}.page_pageGroup__oArcU{overflow:hidden;border:1px solid #e0e7f1;border-radius:16px;background:#fff}.page_pageGroup__oArcU[open]{border-color:#c7d6f0;box-shadow:0 8px 22px rgb(40 75 135/7%)}.page_pageGroup__oArcU>summary{display:flex;min-height:64px;align-items:center;justify-content:space-between;gap:16px;padding:11px 15px;cursor:pointer;list-style:none}.page_pageGroup__oArcU>summary::-webkit-details-marker{display:none}.page_pageGroup__oArcU>summary span{min-width:0}.page_pageGroup__oArcU>summary small,.page_pageGroup__oArcU>summary strong{display:block}.page_pageGroup__oArcU>summary strong{color:#182338;font-size:17px}.page_pageGroup__oArcU>summary small{margin-top:3px;color:#6e7a8d;font-size:12px;font-weight:700}.page_pageGroup__oArcU>summary em{display:grid;width:30px;height:30px;flex:0 0 30px;place-items:center;border-radius:9px;background:#f1f5fb;color:#315fd6;font-style:normal;font-size:18px;transition:transform .16s ease}.page_pageGroup__oArcU[open]>summary em{transform:rotate(180deg)}.page_pageGroupBody__vrzaT{padding:0 15px 15px;border-top:1px solid #edf1f6}.page_exerciseLinks__Ee07h{display:flex;flex-wrap:wrap;gap:8px;padding-top:14px}.page_exerciseLinks__Ee07h a{display:inline-flex;min-height:40px;align-items:center;padding:0 13px;border:1px solid #dbe4f2;border-radius:12px;background:#fff;color:#2858c4;font-size:14px;font-weight:850;text-decoration:none}.page_exerciseLinks__Ee07h a:hover{border-color:#afc2eb;background:#f6f9ff}.page_readerPageLink__qJEjW{display:inline-flex;margin-top:13px;color:#315fd6;font-size:13px;font-weight:850;text-decoration:none}.page_readerPageLink__qJEjW:hover{text-decoration:underline;text-underline-offset:3px}.page_empty__O7_CD{margin-top:18px;padding:24px;border:1px dashed #cfd8e8;border-radius:18px;background:#f8faff;color:#526071;line-height:1.6}@media (max-width:620px){.page_page__2XXuO{width:min(100% - 20px,1100px);padding-top:24px}.page_hero__wrsNH{padding:21px 18px;border-radius:20px}.page_hero__wrsNH h1{font-size:29px}.page_hero__wrsNH p{font-size:15px}.page_stats__8moVe{width:100%}.page_actions__d0VBL{align-items:stretch;flex-direction:column}.page_actions__d0VBL a{justify-content:center}.page_sectionIntro__6OYPr h2{font-size:22px}.page_pageGroup__oArcU>summary{min-height:58px;padding-inline:13px}.page_pageGroupBody__vrzaT{padding-inline:12px}.page_exerciseLinks__Ee07h{gap:7px}.page_exerciseLinks__Ee07h a{min-height:42px;padding-inline:12px}}.page_relatedBooks__0jLdZ{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.page_relatedBooks__0jLdZ a{min-width:0;display:grid;grid-template-columns:58px minmax(0,1fr);gap:10px;align-items:center;padding:10px;border:1px solid #dfe7f1;border-radius:14px;background:#fff;color:inherit;text-decoration:none}.page_relatedBooks__0jLdZ a:focus-visible,.page_relatedBooks__0jLdZ a:hover{border-color:#b7c8e9;background:#f9fbff;outline:none}.page_relatedBooks__0jLdZ img{width:58px;aspect-ratio:700/980;object-fit:cover;border-radius:7px}.page_relatedBooks__0jLdZ span{min-width:0;display:flex;flex-direction:column;gap:3px}.page_relatedBooks__0jLdZ small,.page_relatedBooks__0jLdZ strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.page_relatedBooks__0jLdZ strong{color:#172033;font-size:13px}.page_relatedBooks__0jLdZ small{color:#6e7a8d;font-size:11px}.page_relatedBooks__0jLdZ em{color:#2858c4;font-size:10px;font-style:normal;font-weight:850}@media (max-width:800px){.page_relatedBooks__0jLdZ{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:520px){.page_relatedBooks__0jLdZ{grid-template-columns:1fr}}