:root {
  --primary: #4c6ef5;
  --primary-light: #748ffc;
  --primary-dark: #3b5bdb;
  --bg-card: rgba(255, 255, 255, 0.62);
  --bg-card-hover: rgba(255, 255, 255, 0.78);
  --border-glass: rgba(255, 255, 255, 0.7);
  --border-glass-hover: rgba(76, 110, 245, 0.35);
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #8888aa;
  --shadow-sm: 0 4px 20px rgba(76, 110, 245, 0.08);
  --shadow-md: 0 8px 32px rgba(76, 110, 245, 0.12);
  --shadow-lg: 0 16px 48px rgba(76, 110, 245, 0.18);
  --radius: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 10%, rgba(116, 143, 252, 0.35), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(76, 110, 245, 0.28), transparent 45%),
    linear-gradient(135deg, #eef2ff 0%, #e0e7ff 50%, #dbe4ff 100%);
  background-attachment: fixed;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text-primary);
}
.page-wrapper { max-width: 1100px; margin: 0 auto; padding: 2.5rem 1.5rem 4rem; }

.posts-header { text-align: center; margin-bottom: 3rem; }
.posts-header h1 {
  font-size: 2.6rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
  background: linear-gradient(135deg, #1a1a2e, var(--primary-dark));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.posts-header p { color: var(--text-muted); font-size: 1.05rem; margin: 0; }

.post-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.5rem; }
.post-card {
  display: block;
  padding: 1.8rem;
  background: var(--bg-card);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
.post-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.post-date { font-size: 0.8rem; color: var(--primary); font-weight: 600; margin-bottom: 0.6rem; letter-spacing: 0.5px; }
.post-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 0.6rem 0;
  line-height: 1.4;
}
.post-desc { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.6; margin: 0 0 1rem 0; }
.post-more { font-size: 0.88rem; color: var(--primary); font-weight: 600; }
.post-empty { grid-column: 1 / -1; text-align: center; color: var(--text-muted); padding: 3rem; }