:root{--paper:#f3efe6;--paper2:#ebe4d6;--ink:#23211e;--ink-soft:#56524a;
 --ink-faint:#8b857a;--seal:#9e2b25;--line:#d9d1c1;--card:#fbf9f3;
 --bg:var(--paper);--muted:var(--ink-faint);--accent:var(--seal)}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);
 font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;line-height:1.8}
.topbar{background:var(--ink);color:#efe9dc;padding:12px 20px;font-size:15px;
 border-bottom:2px solid var(--seal)}
.topbar a{color:#efe9dc;text-decoration:none}
.topbar .logo{font-weight:700;letter-spacing:3px;color:#fff}
.hero{position:relative;text-align:center;padding:56px 20px 42px;
 background:radial-gradient(130% 90% at 50% -20%, rgba(35,33,30,.07), transparent 62%),
  linear-gradient(180deg,var(--paper),var(--paper2));
 border-bottom:1px solid var(--line)}
.seal-mark{display:inline-block;width:36px;height:36px;line-height:36px;
 background:var(--seal);color:#fbf9f3;border-radius:6px;font-size:19px;
 margin-bottom:14px;font-weight:700;box-shadow:0 2px 6px rgba(0,0,0,.2)}
.hero-title{font-size:42px;letter-spacing:8px;margin:0 0 10px;color:var(--ink);font-weight:700}
.hero-sub{color:var(--ink-faint);letter-spacing:3px;margin:0 0 24px;font-size:15px}
.shelf{max-width:1100px;margin:0 auto;padding:30px 20px 60px}
.shelf h1{font-size:24px;margin:6px 0 16px;letter-spacing:1px}
.shelf-title{font-size:20px;color:var(--ink-soft);border-left:4px solid var(--seal);
 padding-left:10px;margin:8px 0 20px;letter-spacing:2px}
#search{width:100%;max-width:560px;padding:13px 16px;font-size:16px;display:block;
 margin:0 auto 18px;border:1px solid var(--line);border-radius:24px;background:var(--card);
 color:var(--ink);font-family:inherit}
#search:focus{outline:none;border-color:var(--seal)}
.catnav{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;justify-content:center}
.catbtn{background:var(--card);border:1px solid var(--line);color:var(--ink-soft);
 padding:6px 16px;border-radius:20px;text-decoration:none;font-size:14px;transition:.12s}
.catbtn:hover{background:var(--seal);color:#fff;border-color:var(--seal)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden;
 text-decoration:none;color:inherit;transition:transform .12s,box-shadow .12s}
.card:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(35,33,30,.15);
 border-color:var(--seal)}
.card-cover{height:118px;background:linear-gradient(135deg,#3a3631,#23211e);position:relative}
.card-cover::after{content:"";position:absolute;right:10px;top:10px;width:14px;height:14px;
 background:var(--seal);border-radius:3px;opacity:.9}
.card-title{padding:10px 12px 2px;font-size:15px;font-weight:700;line-height:1.4}
.card-cat{padding:0 12px 12px;font-size:12px;color:var(--ink-faint)}
.bookhome{max-width:820px;margin:0 auto;padding:30px 20px 40px;display:flex;gap:28px;flex-wrap:wrap}
.cover{width:200px;height:280px;border-radius:10px;color:#fff;padding:18px;flex:0 0 auto;
 display:flex;flex-direction:column;justify-content:space-between;
 background:linear-gradient(135deg,#3a3631,#23211e);box-shadow:0 6px 20px rgba(0,0,0,.25)}
.cover-cat{font-size:13px;opacity:.85}
.cover-title{font-size:22px;font-weight:700;line-height:1.3}
.meta{flex:1;min-width:260px}
.meta h1{font-size:26px;margin:0 0 6px}
.cat{display:inline-block;background:#efe7d8;color:var(--seal);padding:3px 12px;
 border-radius:14px;font-size:13px;margin-bottom:14px}
.intro{color:#444;font-size:15px}
.dl{display:flex;gap:12px;margin:8px 0 4px;flex-wrap:wrap}
.dl a{background:var(--seal);color:#fff;padding:7px 16px;border-radius:8px;text-decoration:none;font-size:14px}
.dl a:hover{opacity:.88}
.meta h2{font-size:18px;margin:22px 0 10px;border-bottom:1px solid var(--line);padding-bottom:6px}
.toc{list-style:none;padding:0;columns:2;column-gap:30px}
.toc li{margin:4px 0}
.toc a{color:var(--seal);text-decoration:none}
.toc a:hover{text-decoration:underline}
.bookpage{max-width:1100px;margin:0 auto;padding:24px 20px 60px;display:grid;
 grid-template-columns:240px 1fr;gap:34px;align-items:start}
.tocbox{position:sticky;top:18px;align-self:start;max-height:92vh;overflow:auto;
 background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px 16px 20px}
.btitle{font-size:20px;margin:0 0 6px;line-height:1.35}
.toch{font-size:16px;margin:16px 0 8px;border-bottom:1px solid var(--line);padding-bottom:6px;
 color:var(--ink-soft)}
.content{max-width:760px}
.chapter{padding-bottom:6px;margin-bottom:8px}
.chtitle{font-size:21px;border-bottom:2px solid var(--line);padding-bottom:8px;
 margin:30px 0 18px;scroll-margin-top:18px;color:var(--ink)}
.chapter p{margin:0 0 1.05em;text-align:justify}
@media(max-width:760px){.bookpage{grid-template-columns:1fr;gap:18px}
 .tocbox{position:static;max-height:none}.hero-title{font-size:30px;letter-spacing:4px}}
.reader{max-width:720px;margin:0 auto;padding:26px 20px 40px}
.chtitle{font-size:22px;border-bottom:1px solid var(--line);padding-bottom:10px;margin-bottom:22px}
.reader p{margin:0 0 1.1em;text-align:justify}
.byline{margin-top:2.2em;text-align:right;color:var(--ink-faint);font-style:italic}
.byline-home{color:var(--ink-faint);font-size:14px;margin:2px 0 10px}
.chapnav,.booknav{display:flex;justify-content:space-between;gap:10px;padding:14px 20px;
 flex-wrap:wrap;border-top:1px solid var(--line);background:#fff}
.booknav{max-width:820px;margin:0 auto}
.chapnav a,.booknav .nb{color:var(--seal);text-decoration:none;font-size:14px}
.nb.dim,.dim{color:var(--ink-faint)}
.foot{text-align:center;color:var(--ink-faint);font-size:12px;padding:24px}
.foot a{color:var(--seal)}