.case-chapters{--chapter-ink:#28332d;--chapter-muted:#aeb6b0;--chapter-wash:255 255 255;z-index:80;top:50%;right:max(18px, env(safe-area-inset-right));isolation:isolate;width:44px;font-family:Helvetica Neue,PingFang SC,Microsoft YaHei,sans-serif;position:fixed;transform:translateY(-50%)}.case-chapters-dark{--chapter-ink:#f2f4f2;--chapter-muted:#707773;--chapter-wash:15 18 16}.case-chapters:before{content:"";z-index:-1;background:linear-gradient(270deg, rgb(var(--chapter-wash) / .94), rgb(var(--chapter-wash) / .72) 60%, rgb(var(--chapter-wash) / 0));opacity:0;pointer-events:none;transition:opacity .22s;position:absolute;inset:-16px -10px -16px -40px}.case-chapters[data-expanded=true]{width:min(230px,100vw - 32px)}.case-chapters[data-expanded=true]:before{opacity:1}.case-chapter-list{margin:0;padding:0;list-style:none}.case-chapter-list>li{margin:0;padding:0}.case-chapter-button{width:100%;min-height:36px;color:var(--chapter-ink);font:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent;background:0 0;border:0;justify-content:flex-end;align-items:center;gap:16px;padding:8px;display:flex;position:relative}.case-chapter-line{background:var(--chapter-muted);border-radius:2px;flex:none;width:16px;height:1.5px;transition:width .28s cubic-bezier(.22,1,.36,1),background-color .22s;display:block}.case-chapter-button[aria-current=location] .case-chapter-line{background:var(--chapter-ink);width:28px}.case-chapter-label{text-align:right;white-space:nowrap;opacity:0;pointer-events:none;max-width:165px;font-size:13px;font-weight:400;line-height:1.45;transition:opacity .18s,transform .22s cubic-bezier(.22,1,.36,1);position:absolute;right:52px;transform:translate(7px)}.case-chapters[data-expanded=true] .case-chapter-label{opacity:1;transform:translate(0)}.case-chapter-button[aria-current=location] .case-chapter-label{font-weight:550}.case-chapter-button:hover .case-chapter-line{background:var(--chapter-ink);width:28px}.case-chapter-button:focus-visible{outline:1px solid var(--chapter-ink);outline-offset:-3px;border-radius:5px}.case-return{z-index:90;top:max(20px, env(safe-area-inset-top));opacity:0;pointer-events:none;width:min(280px,100vw - 40px);transition:transform .36s cubic-bezier(.22,1,.36,1),opacity .22s;position:fixed;left:50%;transform:translate(-50%,-92px)}.case-return[data-visible=true],.case-return:focus-within{opacity:1;pointer-events:auto;transform:translate(-50%)}.case-return-link{box-sizing:border-box;color:#f8faf8;-webkit-backdrop-filter:blur(24px)saturate(120%);background:#121613d4;border:1px solid #ffffff24;border-radius:999px;align-items:center;gap:18px;width:100%;min-height:52px;padding:0 22px;font-family:Helvetica Neue,PingFang SC,Microsoft YaHei,sans-serif;text-decoration:none;display:flex;box-shadow:0 5px 22px #00000014}.case-return-dark .case-return-link{background:#1b201de0;border-color:#ffffff35}.case-return-brand{letter-spacing:-1.1px;margin-right:auto;font-size:20px;font-weight:750}.case-return-brand sup{letter-spacing:0;margin-left:3px;font-size:8px;line-height:0;position:relative;top:-.2em}.case-return-label{font-size:13px;line-height:1.5}.case-return-arrow{font-size:18px;font-weight:300}.case-return-link:focus-visible{outline-offset:4px;outline:2px solid #d9e6de}.case-return-link:hover{background:#1c221ef0}@media (max-width:800px){.case-chapters{right:env(safe-area-inset-right,0px)}.case-chapter-button{min-height:44px;padding-inline:4px}.case-chapter-line{width:10px}.case-chapter-button[aria-current=location] .case-chapter-line,.case-chapter-button:hover .case-chapter-line{width:18px}.case-chapter-label{font-size:12px}.case-return{top:max(14px, env(safe-area-inset-top))}.case-return-link{min-height:48px}}@media (prefers-reduced-motion:reduce){.case-chapters:before,.case-chapter-line,.case-chapter-label,.case-return{transition:none}}