:root{
  --paper:#f5f1e6; --paper-2:#efe9da; --ink:#2b2722; --ink-soft:#5c554b;
  --line:#d8cfba; --accent:#7c8c6f; --seal:#a8443b; --maxw:760px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:"Kaiti SC","STKaiti","KaiTi","Kaiti","楷体",
    "Noto Serif CJK SC","Source Han Serif SC","Songti SC",serif;
  line-height:1.9; font-size:18px;
}
a{color:inherit;text-decoration:none;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px;}
.site-header{display:flex;align-items:baseline;justify-content:space-between;
  padding:28px 0 18px;border-bottom:1px solid var(--line);margin-bottom:36px;}
.site-title{font-size:22px;letter-spacing:.3em;}
.nav a{margin-left:22px;color:var(--ink-soft);font-size:16px;}
.nav a.active{color:var(--seal);}
.greeting{color:var(--ink-soft);font-size:15px;letter-spacing:.1em;
  margin:0 0 28px;text-align:center;}
.poem{text-align:center;margin:8px 0 10px;}
.poem-title{font-size:30px;letter-spacing:.12em;margin:0 0 10px;}
.poem-author{color:var(--ink-soft);font-size:16px;margin:0 0 26px;}
.poem-body{font-size:22px;line-height:2.4;}
.poem-line{display:block;}
figure.art{margin:30px 0;text-align:center;min-height:32px;}
figure.art img{max-width:100%;border:1px solid var(--line);border-radius:2px;}
.art.loading::after{content:"⋯ 正在为这首诗作画 ⋯";color:var(--ink-soft);font-size:14px;}
.analysis{margin:28px auto;max-width:34em;color:var(--ink-soft);font-size:17px;
  border-top:1px solid var(--line);padding-top:22px;}
.analysis-label{display:block;text-align:center;color:var(--seal);
  letter-spacing:.4em;font-size:14px;margin-bottom:14px;}
.analysis p{margin:0;line-height:2.1;}
.season-tabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:30px;}
.season-tabs a{padding:5px 16px;border:1px solid var(--line);border-radius:999px;
  color:var(--ink-soft);font-size:15px;}
.season-tabs a.active{background:var(--accent);color:#fff;border-color:var(--accent);}
.poem-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;}
.poem-card{display:block;border:1px solid var(--line);border-radius:4px;
  padding:18px 16px;background:var(--paper-2);transition:transform .15s,box-shadow .15s;}
.poem-card:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(0,0,0,.06);}
.poem-card .t{font-size:19px;margin-bottom:6px;}
.poem-card .a{color:var(--ink-soft);font-size:14px;}
.poem-card .s{float:right;color:var(--accent);font-size:13px;}
.back{display:inline-block;margin:30px 0 0;color:var(--accent);font-size:15px;}
.site-footer{margin:60px 0 40px;text-align:center;color:var(--ink-soft);
  font-size:13px;border-top:1px solid var(--line);padding-top:20px;}
@media(max-width:600px){
  body{font-size:17px;} .poem-title{font-size:26px;} .poem-body{font-size:20px;}
}

/* 桌面:诗页横向双栏(画在左·诗文竖排立轴+赏析在右),一屏放下 */
@media(min-width:920px){
  :root{--maxw:1100px;}
  .detail{display:grid;
    grid-template-columns:minmax(0,440px) minmax(0,400px);
    grid-template-areas:"art poem" "art analysis";
    justify-content:center;column-gap:60px;row-gap:22px;
    align-items:start;margin:8px 0 10px;}
  .detail>figure.art{grid-area:art;margin:0;align-self:start;}
  .detail>figure.art img{width:100%;max-height:80vh;object-fit:contain;}
  .detail>.poem{grid-area:poem;justify-self:end;
    display:flex;flex-direction:row-reverse;align-items:flex-start;gap:.8em;
    margin:0;max-height:76vh;}
  .detail>.poem>*{writing-mode:vertical-rl;margin:0;}
  .detail>.poem .poem-title{font-size:27px;letter-spacing:.22em;}
  .detail>.poem .poem-author{font-size:15px;padding-top:.2em;letter-spacing:.15em;}
  .detail>.poem .poem-body{font-size:21px;line-height:2.4;letter-spacing:.22em;}
  .detail>.analysis{grid-area:analysis;margin:0;max-width:none;
    border-top:1px solid var(--line);padding-top:20px;}
}