:root{
  --bg:#f4f5f7;
  --card:#ffffff;
  --ink:#222;
  --sub:#8a8f99;
  --line:#ececf0;
  --red:#e63946;
  --red-d:#c92a37;
  --gold:#f0a500;
  --shadow:0 1px 3px rgba(0,0,0,.06),0 6px 18px rgba(0,0,0,.05);
  --reader-bg:#f7f4ec;
  --reader-ink:#2b2b2b;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}

/* 顶部导航 */
.topbar{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 1px 6px rgba(0,0,0,.04)}
.topbar .wrap{max-width:1180px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:14px}
.logo{font-size:22px;font-weight:800;color:var(--red);letter-spacing:1px;white-space:nowrap;display:flex;align-items:center;gap:6px}
.logo .badge{font-size:11px;background:var(--red);color:#fff;padding:2px 6px;border-radius:4px;font-weight:600}
.search{flex:1;display:flex;background:var(--bg);border:1px solid var(--line);border-radius:22px;padding:7px 14px;gap:8px;align-items:center}
.search input{border:0;background:transparent;outline:0;flex:1;font-size:15px;color:var(--ink)}
.search svg{flex:none;opacity:.5}
.navlinks{display:flex;gap:16px;font-size:14px;color:var(--sub);white-space:nowrap}
.navlinks a:hover{color:var(--red)}

/* 布局 */
.container{max-width:1180px;margin:0 auto;padding:18px 16px 60px}
.main{flex:1;min-width:0}

/* 横幅（无统计数字） */
.hero{background:linear-gradient(120deg,var(--red),#ff7a59);color:#fff;border-radius:14px;padding:22px 24px;margin-bottom:20px;box-shadow:var(--shadow)}
.hero h1{margin:0 0 6px;font-size:24px}
.hero p{margin:0;opacity:.92;font-size:14px}

/* 分类筛选 */
.catbar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.catpill{border:1px solid var(--line);background:#fff;border-radius:18px;padding:6px 14px;font-size:13px;color:var(--sub);cursor:pointer;transition:.15s;user-select:none}
.catpill:hover{border-color:var(--red);color:var(--red)}
.catpill.active{background:var(--red);border-color:var(--red);color:#fff}

/* 书籍网格 */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:16px}
.bookcard{background:var(--card);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;display:flex;flex-direction:column}
.bookcard:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.cover{aspect-ratio:3/4;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;padding:14px;font-weight:800;font-size:19px;line-height:1.3;text-shadow:0 1px 4px rgba(0,0,0,.25);position:relative}
.cover .cat-tag{position:absolute;top:8px;left:8px;font-size:11px;background:rgba(0,0,0,.28);padding:2px 7px;border-radius:10px;font-weight:600}
.bookbody{padding:9px 11px 12px}
.bookbody .bt{font-size:15px;font-weight:700;margin:0 0 3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bookbody .meta{font-size:12px;color:var(--sub);display:flex;justify-content:space-between}
.bookbody .intro{font-size:12px;color:#6b6f78;margin-top:6px;line-height:1.5;height:54px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical}

/* ===== 书籍详情 + 阅读页 ===== */
.bookpage{padding-top:18px}
.bookhead{display:flex;gap:20px;background:var(--card);border-radius:14px;box-shadow:var(--shadow);padding:22px;margin-bottom:18px}
.bookhead .cover{width:150px;flex:none;border-radius:10px;font-size:22px}
.bookhead .info{flex:1;min-width:0}
.bookhead h1{margin:0 0 8px;font-size:26px}
.bookhead .byline{color:var(--sub);font-size:14px;margin-bottom:10px}
.bookhead .desc{font-size:14px;color:#444;line-height:1.7}
.bookhead .acts{margin-top:16px;display:flex;gap:12px}
.btn{background:var(--red);color:#fff;border:0;border-radius:24px;padding:11px 26px;font-size:15px;font-weight:600;cursor:pointer;transition:.15s}
.btn:hover{background:var(--red-d)}
.btn.ghost{background:#fff;color:var(--red);border:1px solid var(--red)}

.layout{display:flex;gap:22px;align-items:flex-start}
.toc{width:260px;flex:none;background:var(--card);border-radius:14px;box-shadow:var(--shadow);padding:16px 18px;position:sticky;top:72px;max-height:80vh;overflow:auto}
.toc h3{margin:0 0 10px;font-size:16px}
.toclist{margin:0;padding:0;list-style:none;counter-reset:c}
.toclist li{counter-increment:c;padding:6px 0;border-bottom:1px dashed var(--line)}
.toclist li:last-child{border-bottom:0}
.toclist a{font-size:13px;color:#444;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.toclist a:hover{color:var(--red)}

.reader{flex:1;min-width:0;background:var(--reader-bg);border-radius:14px;box-shadow:var(--shadow);padding:30px 26px 20px;min-height:60vh}
.reader.night{background:#1d1f24;color:#c9c9c9}
.reader .btitle{font-size:24px;text-align:center;margin:0 0 24px;color:var(--reader-ink)}
.reader.night .btitle{color:#e8e8e8}
#content{font-size:18px;line-height:2;color:var(--reader-ink);max-width:760px;margin:0 auto;font-family:"Noto Serif SC","Songti SC",STSong,serif}
.reader.night #content{color:#bdbdbd}
#content .ch{margin-bottom:30px}
#content .ch h2{font-size:20px;font-weight:700;margin:0 0 14px;padding-bottom:8px;border-bottom:1px solid rgba(0,0,0,.08)}
.reader.night #content .ch h2{border-color:rgba(255,255,255,.1)}
#content p{margin:0 0 1.1em;text-indent:2em;text-align:justify}

.chapternav{display:flex;justify-content:space-between;align-items:center;max-width:760px;margin:24px auto 0;gap:12px}
.chapternav button{background:#fff;border:1px solid var(--line);border-radius:20px;padding:9px 20px;font-size:14px;cursor:pointer;color:var(--ink)}
.chapternav button:hover{border-color:var(--red);color:var(--red)}
.chapternav #curno{font-size:13px;color:var(--sub)}

.controls{position:sticky;bottom:0;left:0;right:0;background:var(--reader-bg);border-top:1px solid rgba(0,0,0,.08);padding:12px 16px;display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:18px}
.reader.night .controls{background:#1d1f24;border-color:rgba(255,255,255,.1)}
.controls button{background:#fff;border:1px solid var(--line);border-radius:20px;padding:8px 16px;font-size:14px;cursor:pointer;color:var(--ink)}
.controls button:hover{border-color:var(--red);color:var(--red)}
.controls .pbar{flex:1;max-width:360px;height:6px;background:var(--line);border-radius:3px;overflow:hidden}
.controls .pbar i{display:block;height:100%;background:var(--red);width:0}
.controls .pbtxt{font-size:12px;color:var(--sub);min-width:42px;text-align:center}

.empty{text-align:center;color:var(--sub);padding:60px 0}
.loading{text-align:center;color:var(--sub);padding:18px 0;font-size:14px}

@media(max-width:860px){
  .navlinks{display:none}
  .grid{grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:12px}
  .cover{font-size:15px}
  .bookhead{flex-direction:column}
  .bookhead .cover{width:120px;align-self:center}
  .layout{display:block}
  .toc{width:auto;position:static;max-height:none;margin-bottom:16px}
  .reader{padding:20px 16px}
  #content{font-size:17px}
}