/* 用于这些页面：证书、读书、工具 */

:root{
  --card-border:#e7e7e7;
  --card-muted:#666;
  --card-chip:#f6f8fa;
  --card-chip-active:#eaf3ff;
  --card-link:#0b76da;
  --card-shadow:0 1px 2px rgba(0,0,0,.04);
}

.card-grid{ display:grid; gap:14px; }
.card-grid.cols-2{ grid-template-columns: repeat(2, minmax(0,1fr)); }
.card-grid.cols-3{ grid-template-columns: repeat(3, minmax(0,1fr)); }
.card-grid.cols-4{ grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); }

.card-item{
  border:1px solid var(--card-border);
  border-radius:12px;
  background:#fff;
  box-shadow:var(--card-shadow);
  overflow:hidden;
  display:flex;
  gap:12px;
  padding:10px;
  min-height:98px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card-item:hover{
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, .12);
  border-color: rgba(11, 118, 218, .25);
}

.card-thumb{ width:140px; flex:0 0 140px; height:100px; border-radius:8px; overflow:hidden; background:#f3f5f7; }
.card-thumb img{ width:100%; height:100%; object-fit:cover; display:block; cursor:zoom-in; }
.card-body{ min-width:0; flex: 1; }
.card-icon{ width:60px; height:60px; border-radius:8px; margin-bottom:8px; }
.card-title{ margin:.1rem 0 .25rem; font-size:1.2rem; font-weight:600; line-height:1.35; background-color:#f5f5f5;}
.card-subtitle{ font-size:.98rem; color:#444; margin:.05rem 0 .2rem; }
.card-meta{ color:var(--card-muted); font-size:.9rem; margin-top:.05rem; margin-bottom:.15rem; }
.card-links a{ color:#8aa8c9; text-decoration:none; margin-right:10px; opacity:.95; }
.card-links a::after{ content:" ↗"; opacity:.7; }
.card-links a:hover{ color:var(--card-link); text-decoration:underline; opacity:1; }
.card-description{ margin-top:.45rem; color:#333; font-size:.95rem; line-height:1.6; }

.card-wrap{ max-width: 1800px; margin: 0 auto; }
.card-topbar{ display:flex; gap:10px; align-items:center; justify-content:space-between; margin:.5rem 0 1rem; }
.card-count{ font-size:.92rem; color:var(--card-muted); }
.card-filter{ display:flex; flex-wrap:wrap; gap:8px; }
.card-chip{
  border:1px solid #e6e6e6;
  background:var(--card-chip);
  border-radius:999px;
  padding:4px 10px;
  font-size:.9rem;
  cursor:pointer;
  user-select:none;
  display:inline-flex;
  gap:6px;
  align-items:center;
}
.card-chip .num{ font-size:.78rem; color:#555; background:#eef1f4; padding:1px 6px; border-radius:999px; }
.card-chip.active{ background:var(--card-chip-active); border-color:#c7e1ff; }


/* 书单 */
.heart {
  color: red;
}