/* =========================================================
   INSIGHTS · 观察与指南
========================================================= */

/* =========================
   分类卡片
========================= */
.insights-cats{padding:130px 0;background:var(--white)}
.cat-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
  margin-top:20px;
}
.cat-card{
  position:relative;
  display:flex;flex-direction:column;
  padding:44px 38px 38px;
  background:var(--paper);
  border:1px solid var(--line);
  transition:.4s;
  min-height:340px;
}
.cat-card:hover{
  transform:translateY(-6px);
  background:var(--white);
  border-color:var(--line-dark);
  box-shadow:0 24px 60px rgba(42,36,24,.06);
}
.cat-card-num{
  font-family:var(--serif);
  color:var(--gold);
  font-size:14px;
  letter-spacing:.04em;
  margin-bottom:60px;
}
.cat-card-en{
  font-size:9px;
  color:var(--gold);
  letter-spacing:.24em;
  text-transform:uppercase;
  margin-bottom:12px;
}
.cat-card h3{
  font-family:var(--serif);
  font-weight:400;
  font-size:30px;
  line-height:1.2;
  letter-spacing:-.025em;
  margin-bottom:auto;
}
.cat-card-meta{
  margin-top:34px;
  padding-top:24px;
  border-top:1px solid var(--line);
  font-size:11px;
  color:var(--muted);
  letter-spacing:.08em;
}
.cat-card-link{
  margin-top:18px;
  color:var(--gold);
  font-size:11px;
  letter-spacing:.1em;
  transition:letter-spacing .3s;
}
.cat-card:hover .cat-card-link{letter-spacing:.18em}

/* =========================
   最新文章
========================= */
.insights-latest{padding:130px 0;background:var(--paper-2)}

/* =========================
   文章卡片（共用）
========================= */
.post-list{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:26px;
  margin-top:60px;
}
.post-card{
  display:flex;flex-direction:column;
  background:var(--white);
  border:1px solid var(--line);
  overflow:hidden;
  transition:.4s;
}
.post-card:hover{
  transform:translateY(-6px);
  box-shadow:0 24px 60px rgba(42,36,24,.08);
  border-color:var(--line-dark);
}
.post-card-thumb{
  aspect-ratio:4/3;
  overflow:hidden;
  background:var(--paper-2);
}
.post-card-thumb img{
  width:100%;height:100%;object-fit:cover;
  transition:transform 1s;
}
.post-card:hover .post-card-thumb img{transform:scale(1.06)}
.post-card-body{
  padding:28px 30px 32px;
  display:flex;flex-direction:column;
  flex-grow:1;
}
.post-card-cat{
  font-size:9px;
  color:var(--gold);
  letter-spacing:.22em;
  text-transform:uppercase;
  margin-bottom:12px;
}
.post-card-date{
  font-size:10px;
  color:var(--muted);
  letter-spacing:.1em;
  margin-bottom:14px;
}
.post-card-title{
  font-family:var(--serif);
  font-weight:400;
  font-size:22px;
  line-height:1.3;
  letter-spacing:-.02em;
  margin-bottom:14px;
}
.post-card-excerpt{
  color:#7A7265;
  font-size:13px;
  line-height:1.9;
  flex-grow:1;
  margin-bottom:22px;
}
.post-card-link{
  color:var(--gold);
  font-size:11px;
  letter-spacing:.1em;
  transition:letter-spacing .3s;
}
.post-card:hover .post-card-link{letter-spacing:.16em}

/* =========================
   归档页
========================= */
.archive-list{padding:130px 0;background:var(--paper)}

/* =========================
   文章详情
========================= */
.single-page{padding:140px 0 130px;background:var(--paper)}
.single-crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:12px;color:var(--muted);letter-spacing:.06em;
  margin-bottom:60px;
}
.single-crumb a{transition:color .25s}
.single-crumb a:hover{color:var(--gold)}
.single-crumb span{opacity:.4}

.single-header{
  max-width:780px;
  margin-bottom:50px;
}
.single-cat{
  display:inline-block;
  font-size:10px;
  color:var(--gold);
  letter-spacing:.24em;
  text-transform:uppercase;
  margin-bottom:22px;
}
.single-title{
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(34px,4vw,52px);
  line-height:1.18;
  letter-spacing:-.03em;
  margin-bottom:24px;
}
.single-meta{
  font-size:12px;
  color:var(--muted);
  letter-spacing:.08em;
}

.single-cover{
  max-width:900px;
  margin-bottom:60px;
  border-radius:4px;
  overflow:hidden;
}
.single-cover img{width:100%;height:auto}

.single-content{
  max-width:720px;
  color:#4A4234;
  font-size:16px;
  line-height:2.1;
}
.single-content > p{margin-bottom:26px}
.single-content h2{
  font-family:var(--serif);
  font-weight:400;
  font-size:30px;
  line-height:1.25;
  color:var(--ink);
  margin:52px 0 20px;
  letter-spacing:-.02em;
}
.single-content h3{
  font-family:var(--serif);
  font-weight:400;
  font-size:23px;
  line-height:1.3;
  color:var(--ink);
  margin:42px 0 16px;
}
.single-content a{
  color:var(--gold);
  border-bottom:1px solid var(--gold);
}
.single-content ul,
.single-content ol{
  padding-left:22px;
  margin-bottom:26px;
}
.single-content li{margin-bottom:10px}
.single-content blockquote{
  margin:34px 0;
  padding:22px 28px;
  background:var(--white);
  border-left:2px solid var(--gold);
  font-family:var(--serif);
  font-size:17px;
  line-height:1.9;
  color:var(--ink);
  font-style:normal;
}
.single-content img{
  margin:34px 0;
  border-radius:4px;
}

.single-footer{
  max-width:720px;
  margin-top:80px;
  padding-top:40px;
  border-top:1px solid var(--line);
}

/* =========================
   响应式
========================= */
@media(max-width:1100px){
  .cat-card{padding:36px 30px 32px}
  .cat-card h3{font-size:26px}
}

@media(max-width:900px){
  .cat-grid{grid-template-columns:1fr;gap:16px}
  .cat-card{min-height:auto;padding:34px 28px}
  .cat-card-num{margin-bottom:30px}
  .post-list{grid-template-columns:repeat(2,1fr)}
}

@media(max-width:720px){
  .insights-cats,.insights-latest,.archive-list,
  .single-page{padding:90px 0}
  .cat-card{padding:30px 24px}
  .cat-card h3{font-size:24px}
  .post-list{grid-template-columns:1fr;gap:18px}
  .post-card-body{padding:24px 24px 28px}
  .post-card-title{font-size:19px}
  .single-crumb{margin-bottom:40px;font-size:11px}
  .single-title{font-size:30px}
  .single-content{font-size:15px}
  .single-content h2{font-size:24px}
  .single-content h3{font-size:20px}
}