.page-head {
  max-width: 680px;
  margin: 0 auto;
  padding: 56px 20px 8px;
}
.page-head h1 { font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; }
.page-head p { margin-top: 6px; color: #666; }
.post {
  margin: 16px 0;
  padding: 24px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  animation: cardIn 0.5s ease both;
  animation-delay: calc(var(--i, 0) * 70ms);
}
.post:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
}
.post.expanded {
  box-shadow: 0 12px 28px rgba(59, 130, 246, 0.15);
}
.post .meta { font-size: 0.82rem; color: #999; margin-bottom: 6px; }
.post h2 { font-size: 1.25rem; font-weight: 600; }
.post .desc { margin-top: 6px; color: #555; font-size: 0.95rem; }
@keyframes cardIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: none; }
}
.expand-hint {
  font-size: 0.8rem;
  color: #3b82f6;
  margin-top: 8px;
  display: inline-block;
}