/* 读书模式（独立于主题） */
:root{--rfs:19px;--bg:#f6f1e7;--fg:#2b2620;--mt:#8c8273;--ln:#e3d9c6;--card:#fbf7ef;--ac:#a0522d;--rw:720px}
html[data-bg=white]{--bg:#ffffff;--fg:#222;--mt:#888;--ln:#eee;--card:#fafafa;--ac:#2563eb}
html[data-bg=paper]{--bg:#f6f1e7;--fg:#2b2620;--mt:#8c8273;--ln:#e3d9c6;--card:#fbf7ef;--ac:#a0522d}
html[data-bg=green]{--bg:#cfe6cf;--fg:#1f2e1f;--mt:#5f7a5f;--ln:#b5d1b5;--card:#dcefdc;--ac:#2f6b3a}
html[data-bg=sepia]{--bg:#e9d9b6;--fg:#3b2a17;--mt:#86704f;--ln:#d6c294;--card:#f0e3c4;--ac:#8b4513}
html[data-bg=night]{--bg:#141414;--fg:#b8b2a6;--mt:#6d685f;--ln:#2a2a2a;--card:#1c1c1c;--ac:#c9a36a}
html[data-width=narrow]{--rw:600px}html[data-width=wide]{--rw:900px}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0}
body{background:var(--bg);color:var(--fg);font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",STSong,SimSun,serif;-webkit-font-smoothing:antialiased;transition:background .3s,color .3s;min-height:100vh}
html[data-font=kai] body{font-family:"LXGW WenKai","Kaiti SC",STKaiti,KaiTi,serif}
html[data-font=sans] body{font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
.ico{width:1.1em;height:1.1em;vertical-align:-.18em}

/* 顶栏 */
.rd-top{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:10px;height:52px;padding:0 16px;padding-top:env(safe-area-inset-top);background:color-mix(in srgb,var(--bg) 88%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--ln);font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;font-size:14px;transition:transform .3s}
.rd-top.hide{transform:translateY(-100%)}
.rd-back{display:inline-flex;align-items:center;gap:4px;color:var(--mt);flex:none;min-width:70px}
.rd-back:hover{color:var(--ac)}
.rd-top-t{flex:1;text-align:center;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rd-ico{border:0;background:none;width:40px;height:40px;border-radius:50%;display:grid;place-items:center;color:var(--mt);flex:none;margin-left:30px}
.rd-ico:hover{color:var(--ac)}
.rd-progress{position:fixed;top:0;left:0;height:2px;background:var(--ac);z-index:30;width:0}

.rd-wrap{max-width:var(--rw);margin:0 auto;padding:30px 22px calc(60px + env(safe-area-inset-bottom))}
.rd-empty{text-align:center;color:var(--mt);padding:60px 0}

/* 书架 */
.rd-shelf .rd-wrap{max-width:1100px}
.rd-hero{text-align:center;padding:20px 0 34px}
.rd-hero h1{font-size:30px;margin:0 0 10px;letter-spacing:.06em}
.rd-hero p{color:var(--mt);margin:0}
.rd-continue{display:inline-block;margin-top:18px;padding:9px 22px;border-radius:24px;background:var(--ac);color:#fff;font-size:15px}
.shelf{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:34px 26px}
.book{display:block;perspective:800px}
.book-cover{position:relative;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:10px;aspect-ratio:3/4.2;border-radius:3px 8px 8px 3px;padding:18px 16px 18px 26px;text-align:center;color:#fff;
  background:linear-gradient(135deg,hsl(var(--h) 38% 34%),hsl(calc(var(--h) + 30) 42% 22%)) center/cover;box-shadow:inset 4px 0 6px rgba(255,255,255,.12),6px 8px 18px rgba(0,0,0,.25);transition:transform .35s}
.book-cover[style*=background-image]::before{content:"";position:absolute;inset:0;background:rgba(0,0,0,.35);border-radius:inherit}
.book-cover>*{position:relative}
.book-spine{position:absolute!important;left:0;top:0;bottom:0;width:12px;background:linear-gradient(90deg,rgba(0,0,0,.35),rgba(255,255,255,.08),rgba(0,0,0,.2));border-radius:3px 0 0 3px}
.book-cover b{font-size:20px;letter-spacing:.12em;line-height:1.45;border:1px solid rgba(255,255,255,.55);outline:1px solid rgba(255,255,255,.25);outline-offset:3px;padding:14px 12px;background:rgba(0,0,0,.12);max-width:100%;word-break:break-all}
.book-cover small{font-size:12px;opacity:.8;letter-spacing:.2em}
.book:hover .book-cover{transform:rotateY(-12deg) translateY(-4px)}
.book-info{display:flex;flex-direction:column;align-items:center;margin-top:12px;font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
.book-info b{font-size:15px}
.book-info small{color:var(--mt);font-size:12.5px;margin-top:2px}

/* 目录 */
.toc-head{text-align:center;padding:16px 0 26px;border-bottom:1px solid var(--ln);margin-bottom:10px}
.toc-head h1{font-size:32px;margin:0 0 10px;letter-spacing:.08em}
.toc-head p{color:var(--mt);margin:0 0 8px}
.toc-meta{color:var(--mt);font-size:14px}
.toc-acts{display:flex;justify-content:center;gap:10px;margin-top:20px;flex-wrap:wrap}
.rd-btn{display:inline-flex;align-items:center;padding:9px 22px;border-radius:24px;border:1px solid var(--ln);background:var(--card);font-size:14.5px;font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
.rd-btn.primary{background:var(--ac);border-color:var(--ac);color:#fff}
.toc-vol h2{font-size:18px;margin:28px 0 8px;padding-bottom:8px;border-bottom:1px dashed var(--ln);display:flex;align-items:baseline;gap:8px}
.toc-vol h2 em{font-style:normal;font-size:13px;color:var(--mt);font-weight:400}
.toc ol{list-style:none;margin:0;padding:0}
.toc li a{display:flex;align-items:baseline;gap:12px;padding:11px 6px;border-bottom:1px solid color-mix(in srgb,var(--ln) 60%,transparent);border-radius:4px}
.toc li a:hover{background:var(--card);color:var(--ac)}
.toc-no{color:var(--mt);font-size:13px;min-width:2.6em;font-variant-numeric:tabular-nums;font-family:-apple-system,"PingFang SC",sans-serif}
.toc-t{flex:1;font-size:16.5px}
.toc time{color:var(--mt);font-size:12.5px;font-family:-apple-system,"PingFang SC",sans-serif;white-space:nowrap}
.toc li.read .toc-t{color:var(--mt)}
.toc li.cur a{background:var(--card);color:var(--ac)}
.toc li.cur .toc-t::after{content:"  · 上次读到这里";font-size:12px;color:var(--ac)}

/* 阅读页 */
.rd-title{font-size:calc(var(--rfs) * 1.55);line-height:1.4;text-align:center;margin:18px 0 10px;letter-spacing:.04em}
.rd-meta{text-align:center;color:var(--mt);font-size:13.5px;margin-bottom:36px;font-family:-apple-system,"PingFang SC",sans-serif}
.rd-content{font-size:var(--rfs);line-height:2;text-align:justify;word-break:break-word}
.rd-content p{margin:0 0 1em;text-indent:2em}
.rd-content p:has(img),.rd-content li p,.rd-content blockquote p{text-indent:0}
.rd-content h2,.rd-content h3,.rd-content h4{font-size:1.15em;margin:1.8em 0 .8em;text-align:center}
.rd-content img{display:block;max-width:100%;height:auto;margin:1.4em auto;border-radius:4px}
.rd-content blockquote{margin:1.2em 0;padding:.4em 1em;border-left:3px solid var(--ac);color:var(--mt)}
.rd-content a{color:var(--ac);border-bottom:1px solid currentColor}
.rd-content pre{white-space:pre-wrap;font-size:.8em;background:var(--card);padding:12px;border-radius:6px;overflow:auto}
.rd-content table{border-collapse:collapse;width:100%;font-size:.9em}
.rd-content td,.rd-content th{border:1px solid var(--ln);padding:6px 10px}
.rd-content hr{border:0;text-align:center;margin:2em 0}
.rd-content hr::after{content:"＊　＊　＊";color:var(--mt)}
.rd-content .table-wrap{overflow-x:auto}
.rd-end{text-align:center;color:var(--mt);margin:44px 0 30px;letter-spacing:.3em;font-size:14px}
.rd-pager{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
.rd-pg{display:flex;flex-direction:column;gap:4px;padding:14px 16px;border-radius:10px;background:var(--card);border:1px solid var(--ln);min-width:0}
.rd-pg:last-child{text-align:right}
.rd-pg small{color:var(--mt);font-size:12px}
.rd-pg b{font-weight:500;font-size:14.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rd-pg.mid{text-align:center;justify-content:center;padding:14px 20px}
.rd-pg.off{opacity:.5}
a.rd-pg:hover{border-color:var(--ac);color:var(--ac)}
.rd-orig{text-align:center;margin-top:26px;font-size:13px}
.rd-orig a{color:var(--mt);border-bottom:1px dashed var(--mt)}
.rd-swipe{position:fixed;top:50%;z-index:40;transform:translateY(-50%);background:var(--ac);color:#fff;padding:10px 14px;border-radius:20px;font-size:14px;opacity:0;transition:opacity .2s;pointer-events:none;font-family:-apple-system,"PingFang SC",sans-serif}
.rd-swipe.l{left:10px}.rd-swipe.r{right:10px}.rd-swipe.on{opacity:.9}

/* 设置面板 */
.rd-panel{position:fixed;inset:0;z-index:50;background:rgba(0,0,0,.3)}
.rd-panel[hidden]{display:none}
.rd-panel-box{position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:min(520px,100%);background:var(--card);color:var(--fg);border-radius:16px 16px 0 0;padding:20px 22px calc(20px + env(safe-area-inset-bottom));box-shadow:0 -10px 40px rgba(0,0,0,.2);font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;animation:up .25s}
@keyframes up{from{transform:translate(-50%,100%)}}
.rd-row{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.rd-row>span{width:44px;color:var(--mt);font-size:14px;flex:none}
.rd-opts{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.rd-opts button{border:1px solid var(--ln);background:var(--bg);border-radius:18px;padding:6px 14px;font-size:14px}
.rd-opts button.on{border-color:var(--ac);color:var(--ac);font-weight:600}
.rd-opts .bg-white{background:#fff;color:#222}.rd-opts .bg-paper{background:#f6f1e7;color:#2b2620}.rd-opts .bg-green{background:#cfe6cf;color:#1f2e1f}.rd-opts .bg-sepia{background:#e9d9b6;color:#3b2a17}.rd-opts .bg-night{background:#141414;color:#b8b2a6}
.rd-fs-v{min-width:30px;text-align:center}
.rd-tip{color:var(--mt);font-size:12.5px;margin:4px 0 0;text-align:center}

@media (max-width:640px){
  .rd-wrap{padding:22px 18px calc(50px + env(safe-area-inset-bottom))}
  .shelf{grid-template-columns:repeat(3,1fr);gap:24px 14px}
  .book-cover{padding:12px 8px 12px 16px}
  .book-cover b{font-size:14px;padding:8px 6px;letter-spacing:.05em}
  .book-cover small{display:none}
  .book-info b{font-size:13.5px}
  .rd-hero h1{font-size:24px}
  .toc-head h1{font-size:26px}
  .toc time{display:none}
  .rd-pager{grid-template-columns:1fr 1fr}
  .rd-pg.mid{display:none}
  .rd-ico{margin-left:0}
}
@media (max-width:380px){.shelf{grid-template-columns:repeat(2,1fr)}}