/* 站情·快乐学 · 工具卡片样式（供 hub 页共用） */
:root {
  --text: #0F1A14;
  --text-dim: #55665C;
  --text-mute: #8A968D;
  --border: #E4EDE7;
  --brand: #22C55E;
  --brand-deep: #15803D;
  --brand-soft: rgba(34,197,94,0.15);
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.hub-card {
  display: flex; flex-direction: column;
  padding: 20px 22px 18px;
  background: #FFFFFF;
  border: 1px solid rgba(15, 26, 20, 0.08);
  border-radius: 16px;
  text-decoration: none; color: inherit;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative; overflow: hidden;
  box-shadow:
    0 1px 2px rgba(15, 26, 20, 0.04),
    0 4px 12px -6px rgba(15, 26, 20, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  isolation: isolate;
}
.hub-card-glow {
  position: absolute; top: -60px; left: 50%;
  width: 200px; height: 200px; margin-left: -100px;
  background: radial-gradient(circle, var(--soft, rgba(34,197,94,0.15)) 0%, transparent 70%);
  opacity: 0; transition: opacity 0.35s;
  pointer-events: none; z-index: 0;
}
.hub-card:hover .hub-card-glow { opacity: 1; }
.hub-card:hover {
  transform: translateY(-6px);
  border-color: var(--c1, #22C55E);
  box-shadow:
    0 2px 4px rgba(15, 26, 20, 0.05),
    0 12px 24px -8px var(--soft, rgba(34,197,94,0.3)),
    0 24px 48px -20px rgba(0, 0, 0, 0.10),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
}
.hub-card-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; border-radius: 14px;
  background: linear-gradient(135deg, var(--c1, #22C55E), var(--c2, #15803D));
  color: #FFF;
  box-shadow:
    0 8px 20px -8px var(--c1, #22C55E),
    0 4px 8px -4px rgba(0,0,0,0.12),
    inset 0 1px 0 rgba(255,255,255,0.4),
    inset 0 -1px 0 rgba(0,0,0,0.15);
  margin-bottom: 16px;
  position: relative; z-index: 1;
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.hub-card-icon svg { width: 24px; height: 24px; filter: drop-shadow(0 1px 1px rgba(0,0,0,0.15)); }
.hub-card:hover .hub-card-icon {
  transform: translateY(-3px) scale(1.06) rotate(-3deg);
  box-shadow:
    0 12px 28px -8px var(--c1, #22C55E),
    0 6px 12px -4px rgba(0,0,0,0.18),
    inset 0 1px 0 rgba(255,255,255,0.5),
    inset 0 -1px 0 rgba(0,0,0,0.2);
}
.hub-card-body { flex: 1; position: relative; z-index: 1; }
.hub-card-title {
  font-size: 15px; font-weight: 700; margin-bottom: 6px;
  color: var(--text); line-height: 1.35;
  display: flex; align-items: center; flex-wrap: wrap; gap: 6px;
}
.hub-card:hover .hub-card-title { color: var(--c2, #15803D); }
.hub-card-tag {
  display: inline-block; padding: 2px 7px; border-radius: 5px;
  color: #FFF; font-size: 10px; font-weight: 700; letter-spacing: 0.02em;
  box-shadow: 0 2px 6px -2px rgba(0,0,0,0.25);
}
.hub-card-desc { font-size: 12.5px; line-height: 1.7; color: var(--text-dim); }

@media (max-width: 640px) {
  .hub-grid { grid-template-columns: 1fr; gap: 14px; }
  .hub-card { padding: 18px 18px 16px; }
}