.section-book-contents{display:block;font-family:var(--font-body-family)}.book-contents__header{text-align:center;max-width:64rem;margin:0 auto 4rem;display:flex;flex-direction:column;gap:1.2rem}.book-contents__eyebrow{font-size:1.4rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:rgb(var(--color-button));margin:0}.book-contents__title{font-size:clamp(2.8rem,4vw,4.4rem);font-weight:800;line-height:1.2;margin:0;color:rgba(var(--color-foreground),1);font-family:var(--font-heading-family)}.book-contents__desc{font-size:1.8rem;line-height:1.7;color:rgba(var(--color-foreground),.7)}.book-contents__desc p{margin:0}.book-contents__accordion{max-width:80rem;margin:0 auto;display:flex;flex-direction:column;gap:1.2rem}.book-contents__item{border:1px solid rgba(var(--color-foreground),.1);border-radius:1.2rem;overflow:hidden;background:rgb(var(--color-background));transition:border-color .25s ease,box-shadow .25s ease}.book-contents__item--open{border-color:rgba(var(--color-button),.3);box-shadow:0 4px 20px rgba(var(--color-button),.06)}.book-contents__trigger{width:100%;display:flex;align-items:center;gap:1.4rem;padding:1.8rem 2rem;border:none;background:none;cursor:pointer;font-family:inherit;text-align:right;color:rgba(var(--color-foreground),1);transition:background .2s ease}.book-contents__trigger:hover{background:rgba(var(--color-foreground),.03)}.book-contents__trigger-icon-badge{flex-shrink:0;width:3.6rem;height:3.6rem;border-radius:50%;display:flex;align-items:center;justify-content:center;background:rgba(var(--color-foreground),.08);color:rgba(var(--color-foreground),.5);transition:background .2s ease,color .2s ease}.book-contents__item--open .book-contents__trigger-icon-badge{background:rgb(var(--color-button));color:rgb(var(--color-button-text))}.book-contents__trigger-text{flex:1;font-size:1.9rem;font-weight:700;line-height:1.4}.book-contents__trigger-icon{flex-shrink:0;width:2.4rem;height:2.4rem;display:flex;align-items:center;justify-content:center;color:rgba(var(--color-foreground),.4);transition:transform .3s ease,color .3s ease}.book-contents__item--open .book-contents__trigger-icon{color:rgb(var(--color-button));transform:rotate(180deg)}.book-contents__panel{overflow:hidden}.book-contents__panel[hidden]{display:none}.book-contents__panel-inner{padding:0 2rem 2rem;padding-inline-start:6.6rem;display:flex;flex-direction:column;gap:1.4rem}.book-contents__body{font-size:1.7rem;line-height:1.7;color:rgba(var(--color-foreground),.7)}.book-contents__body p{margin:0}.book-contents__topics{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.6rem}.book-contents__topic{display:flex;flex-direction:column;gap:0;font-size:1.6rem;line-height:1.6;color:rgba(var(--color-foreground),.75)}.book-contents__topic:before{display:none}.book-contents__topic-text{display:grid;grid-template-columns:2.4rem 1fr;align-items:baseline;gap:.4rem}.book-contents__topic-text:before{content:attr(data-num) ".";font-weight:700;color:rgb(var(--color-button))}.book-contents__sub-topics{list-style:none;padding:0;margin:.6rem 0 0;padding-inline-start:2.8rem;display:flex;flex-direction:column;gap:.4rem;border-top:1px dashed rgba(var(--color-foreground),.1);padding-top:.7rem}.book-contents__sub-topic{display:flex;align-items:baseline;gap:.7rem;font-size:1.45rem;line-height:1.6;color:rgba(var(--color-foreground),.55)}.book-contents__sub-topic:before{content:"\25c6";flex-shrink:0;font-size:.55rem;color:rgb(var(--color-button));opacity:.55;align-self:center}@media screen and (max-width:749px){.book-contents__header{margin-bottom:2.4rem}.book-contents__title{font-size:clamp(2.4rem,7vw,3.2rem)}.book-contents__trigger{padding:1.4rem 1.6rem;gap:1rem}.book-contents__trigger-icon-badge{width:3.2rem;height:3.2rem}.book-contents__trigger-text{font-size:1.7rem}.book-contents__panel-inner{padding:0 1.6rem 1.6rem;padding-inline-start:4.4rem}.book-contents__topic{font-size:1.5rem}}
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