/* 红楼书墙 · 沿用红楼书屋的纸墨配色与顶栏样式 */
:root{
  --ink:#2a2520; --brown:#7A1020; --brown2:#8A1A2A; --line:#e7e0d5;
  --paper:#f6f3ee; --muted:#9a9186; --card:#fff; --soft:#fffdfa;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:"Microsoft YaHei","PingFang SC",-apple-system,BlinkMacSystemFont,"Hiragino Sans GB",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brown2);text-decoration:none}
img{display:block}

/* ---------- 顶栏 ---------- */
.hs-head{background:linear-gradient(135deg,#7A1020,#8A1A2A);color:#fff;padding:10px 20px}
.hs-row{max-width:1280px;margin:0 auto;display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
.hs-brand,.hs-brand:link,.hs-brand:visited{font-size:22px;letter-spacing:5px;color:#fff;text-decoration:none;white-space:nowrap;font-weight:600}
.hs-brand:hover{opacity:.9}
.hs-search{display:flex;align-items:stretch;width:100%;max-width:320px;margin:0;border:1px solid #fff;border-radius:18px;overflow:hidden;background:rgba(255,255,255,.06)}
.hs-search input{flex:1 1 auto;min-width:0;width:auto;padding:5px 14px;font-size:13px;line-height:1.2;color:#fff;border:0;outline:none;background:transparent}
.hs-search input::placeholder{color:rgba(255,255,255,.72)}
.hs-search button{flex:0 0 auto;border:0;border-left:1px solid rgba(255,255,255,.45);background:transparent;color:#fff;font-size:13px;font-weight:600;padding:0 14px;font-family:inherit;cursor:pointer}
.hs-search button:hover{background:rgba(255,255,255,.16)}
.hs-nav{display:flex;align-items:center;gap:10px;font-size:13px}
.hs-nav a,.hs-nav a:visited{color:#fff;text-decoration:none;border:1px solid rgba(255,255,255,.45);border-radius:16px;padding:4px 12px;white-space:nowrap}
.hs-nav a:hover{background:rgba(255,255,255,.16)}
@supports (-webkit-touch-callout:none){.hs-search input{font-size:16px;padding:3px 14px}}

/* ---------- 页面标题 ---------- */
.wall-wrap{max-width:1280px;margin:0 auto;padding:26px 20px 10px}
.wall-head{text-align:center;margin:0 0 22px}
.wall-head h1{
  display:inline-block;font-size:26px;line-height:1.4;font-weight:600;color:var(--brown);
  letter-spacing:6px;margin:0 0 8px;padding:0 0 8px;border-bottom:2px solid #d4c4a8;
}
.wall-head p{margin:0;font-size:13px;color:var(--muted);letter-spacing:1px}
.wall-head p b{color:var(--brown2);font-weight:600}

/* ---------- 瀑布流 ---------- */
.wall{columns:6 168px;column-gap:18px}
.card{
  break-inside:avoid;-webkit-column-break-inside:avoid;page-break-inside:avoid;
  margin:0 0 18px;background:var(--card);border:1px solid var(--line);border-radius:10px;
  overflow:hidden;box-shadow:0 1px 3px rgba(42,37,32,.05);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  content-visibility:auto;contain-intrinsic-size:auto 300px;
}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(42,37,32,.14);border-color:#d4c4a8}
.card .cover{display:block;position:relative;aspect-ratio:3/4;background:#efe7dc;overflow:hidden}
.card .cover img{position:absolute;inset:0;z-index:1;width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card:hover .cover img{transform:scale(1.035)}
.card .read-badge{
  position:absolute;left:50%;bottom:10px;transform:translate(-50%,8px);opacity:0;
  background:rgba(122,16,32,.92);color:#fff;font-size:12px;letter-spacing:2px;
  padding:4px 16px;border-radius:14px;white-space:nowrap;transition:opacity .18s ease,transform .18s ease;
  pointer-events:none;backdrop-filter:blur(2px);z-index:2;
}
.card:hover .read-badge{opacity:1;transform:translate(-50%,0)}
/* 没有封面时的纸质书脊 */
.card .fallback{
  position:absolute;inset:0;z-index:0;display:flex;flex-direction:column;justify-content:space-between;
  padding:16px 14px;color:#7A1020;
  background:
    linear-gradient(135deg,rgba(255,255,255,.55),rgba(255,255,255,0) 60%),
    linear-gradient(160deg,#f3ead7,#e9dcc4 55%,#e2d2b6);
}
.card .fallback::after{content:"";position:absolute;left:12px;top:0;bottom:0;width:3px;background:rgba(122,16,32,.28);border-radius:2px}
.card .fallback .ft{font-size:14px;line-height:1.55;font-weight:600;letter-spacing:1px;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.card .fallback .fa{font-size:11px;color:#8a6a45;letter-spacing:1px;text-align:right;margin-top:auto}
.card .meta{padding:9px 11px 11px}
.card .meta .t{
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  font-size:13px;line-height:1.55;color:var(--ink);font-weight:600;min-height:2.6em;
}
.card:hover .meta .t{color:var(--brown)}
.card .meta .a{
  margin:4px 0 5px;font-size:12px;color:var(--brown2);opacity:.85;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.card .meta .m{font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:.5px}
.empty{text-align:center;padding:80px 20px;color:var(--muted);font-size:15px;letter-spacing:2px}

/* ---------- 页脚 ---------- */
.hs-foot{text-align:center;padding:30px 20px 40px;color:var(--muted);font-size:13px}
.hs-foot-links{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:14px;row-gap:6px;margin:0 0 10px;font-size:13px;letter-spacing:1px}
.hs-foot-links a,.hs-foot-links a:visited{color:var(--brown2);text-decoration:none}
.hs-foot-links a:hover{color:var(--brown);text-decoration:underline}
.hs-foot-links i{display:inline-block;width:1px;height:12px;background:#d4c4a8}
.hs-foot-copy{margin:0;font-size:12px;color:var(--muted)}
.hs-top{position:fixed;right:14px;bottom:14px;width:34px;height:34px;line-height:32px;text-align:center;font-size:15px;color:var(--brown);background:#fff;border:1px solid #d4c4a8;border-radius:50%;box-shadow:0 2px 8px rgba(0,0,0,.12);z-index:99;cursor:pointer;padding:0;transition:background .2s,color .2s;opacity:0;pointer-events:none}
.hs-top.on{opacity:1;pointer-events:auto}
.hs-top:hover{background:var(--brown);color:#fff;border-color:var(--brown)}

@media (max-width:900px){.wall{columns:4 150px}.wall-head h1{font-size:22px;letter-spacing:4px}}
@media (max-width:640px){
  .hs-row{flex-direction:column;gap:8px}
  .hs-brand{font-size:19px;letter-spacing:3px}
  .hs-search{max-width:300px}
  .wall{columns:3 120px;column-gap:12px}
  .card{margin-bottom:12px}
  .card .meta{padding:7px 9px 9px}
  .wall-wrap{padding:18px 12px 6px}
}
@media (max-width:420px){.wall{columns:2 130px;column-gap:10px}}