:root{color-scheme:light;--eh-bg:#faf9f6;--eh-text:#252d29;--eh-muted:#667168;--eh-line:#dfe2db;--eh-accent:#355d4c;--eh-soft:#eef1eb}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark;--eh-bg:#191d1b;--eh-text:#e5ebe6;--eh-muted:#abb6ad;--eh-line:#3b453e;--eh-accent:#acd0b8;--eh-soft:#252e28}}:root[data-theme=dark]{color-scheme:dark;--eh-bg:#191d1b;--eh-text:#e5ebe6;--eh-muted:#abb6ad;--eh-line:#3b453e;--eh-accent:#acd0b8;--eh-soft:#252e28}*{box-sizing:border-box}body{margin:0;background:var(--eh-bg);color:var(--eh-text);font-family:system-ui,-apple-system,segoe ui,microsoft jhenghei,sans-serif;font-size:16px;line-height:1.8}a{color:var(--eh-accent);text-decoration-thickness:1px;text-underline-offset:4px}a:hover{text-decoration:underline}button{font:inherit}img{max-width:100%;height:auto}:focus-visible{outline:2px solid var(--eh-accent);outline-offset:4px}.eh-shell{max-width:1e3px;padding:0 44px;margin:0 auto}.eh-header{display:flex;align-items:center;gap:24px;padding:25px 0;border-bottom:1px solid var(--eh-line)}.eh-brand{color:var(--eh-text);font:500 24px/1.3 Georgia,serif;white-space:nowrap;margin-right:auto;text-decoration:none}.eh-brand span{color:var(--eh-accent)}.eh-nav{display:flex;flex-wrap:wrap;gap:20px}.eh-nav a{font-size:14px;color:var(--eh-muted);text-decoration:none}.eh-nav a:hover,.eh-nav a[aria-current=page]{color:var(--eh-text);text-decoration:underline}.eh-theme{color:var(--eh-muted);border:1px solid var(--eh-line);border-radius:5px;background:0 0;min-height:36px;padding:4px 10px;font-size:12px;white-space:nowrap;cursor:pointer}.eh-theme:hover{color:var(--eh-text);background:var(--eh-soft)}.eh-main{min-height:65vh;padding:56px 0 64px}.eh-home-title{font:clamp(38px,6vw,54px)/1.2 Georgia,serif;letter-spacing:-1.5px;margin:6px 0 54px}.eh-home-sections{display:grid;grid-template-columns:1fr 1fr;gap:36px 50px}.eh-home-sections section:first-child{grid-column:1/-1}.eh-section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:16px;border-bottom:1px solid var(--eh-line);padding-bottom:12px}.eh-section-heading h2{font-size:20px;font-weight:500;margin:0}.eh-section-heading h2 a{color:var(--eh-text);text-decoration:none}.eh-section-link{font-size:12px;color:var(--eh-muted);white-space:nowrap;text-decoration:none}.eh-empty{color:var(--eh-muted);font-size:14px;margin:20px 0}.eh-footer{display:flex;gap:20px;justify-content:space-between;padding:20px 0 28px;border-top:1px solid var(--eh-line);color:var(--eh-muted);font-size:12px}.eh-footer a{color:inherit;text-decoration:none}.eh-plain h1{font-size:34px;font-weight:500;margin:0 0 28px}.eh-plain article{max-width:700px}.eh-entry-list{list-style:none;padding:0;margin:12px 0}.eh-entry-list li{padding:12px 0;border-bottom:1px solid var(--eh-line)}.eh-entry-list p{margin:6px 0 0;font-size:14px;color:var(--eh-muted)}.eh-skip{position:absolute;top:-100px;left:16px;background:var(--eh-bg);color:var(--eh-text);padding:8px 16px;z-index:20}.eh-skip:focus{top:8px}.eh-draft{font-size:12px;color:var(--eh-muted)}.eh-draft-notice{font-size:13px;background:var(--eh-soft);padding:10px 14px;border-left:3px solid var(--eh-accent)}body:not(.eh-site){--body-background:var(--eh-bg);--body-font-color:var(--eh-text);--color-link:var(--eh-accent);--gray-100:var(--eh-soft);--gray-200:var(--eh-line);--gray-500:var(--eh-muted)}.book-page .eh-header{flex-wrap:wrap;gap:16px;padding-top:0;margin-bottom:32px}.book-page .eh-brand{font-size:20px}.book-page .eh-nav{gap:14px}.book-page .eh-nav a{font-size:13px}.book-menu-content,.book-toc-content{background:var(--eh-bg)}.book-brand a{color:var(--eh-text)}.book-search input{background:var(--eh-soft);color:var(--eh-text)}.book-article img[src$="favicon.svg"]{width:64px}.book-article{overflow-wrap:anywhere}.book-article pre{overflow-x:auto}.eh-note-index{padding-left:24px}.eh-note-index li{margin-bottom:10px}@media(max-width:760px){.eh-shell{padding:0 24px}.eh-header{flex-wrap:wrap;gap:16px;padding:22px 0}.eh-header .eh-nav{order:3;width:100%;gap:20px}.eh-nav a{display:flex;align-items:center;min-height:32px}.eh-main{padding-top:40px}.eh-home-title{margin-bottom:40px}.eh-home-sections{grid-template-columns:1fr;gap:26px}.eh-home-sections section:first-child{grid-column:auto}.eh-theme{min-height:44px}.book-page .eh-header{margin-top:20px}}@media(max-width:360px){.eh-shell{padding:0 18px}.eh-header .eh-nav{gap:14px}.eh-nav a{font-size:13px}}