/* ── 功能矩阵 ── */
.feature-group { margin-bottom: 2.5rem; }
.feature-group-title { font-size: 1.5rem; font-weight: 600; color: var(--text-strong); margin-bottom: 1rem; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 1rem; }

.grid-item {
  background: var(--surface-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  text-align: center;
  padding: 1.25rem 0.75rem 1rem;
  transition: all 0.3s ease;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.grid-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

.icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.625rem auto;
  background: rgba(74,144,226,0.07);
  transition: background 0.3s ease;
  flex-shrink: 0;
}
.grid-item:hover .icon-wrapper { background: rgba(74,144,226,0.14); }
.icon-wrapper i { font-size: 1.375rem; line-height: 1; }
.grid-item p { font-size: 0.8125rem; margin: 0; line-height: 1.4; color: var(--text-primary); }
.grid-item .text-xs { font-size: 0.7rem; color: var(--text-muted); display: block; }

/* Tailwind 颜色工具类（icon 着色，仅限 color 属性） */
.text-green-600 { color: #16a34a; }
.text-green-500 { color: #22c55e; }
.text-red-500   { color: #ef4444; }
.text-blue-600  { color: #2563eb; }
.text-blue-500  { color: #3b82f6; }
.text-blue-400  { color: #60a5fa; }
.text-yellow-500{ color: #eab308; }
.text-orange-500{ color: #f97316; }
.text-cyan-500  { color: #06b6d4; }
.text-pink-500  { color: #ec4899; }
.text-indigo-500{ color: #6366f1; }
.text-purple-500{ color: #a855f7; }

/* ── 二维码区块 ── */
#qrcode { background: var(--surface-0); }
#qrcode h2 { text-align: center; font-size: clamp(22px, 3vw, 32px); color: var(--text-strong); margin: 0 0 0.5rem; }
.qrcode-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2.5rem;
  margin-top: 2rem;
}
.qrcode-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.qrcode-card img {
  width: 140px;
  height: 140px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
  background: #fff;
  padding: 6px;
  box-shadow: var(--shadow-sm);
  display: block;
}
.qrcode-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 600;
  text-align: center;
}
.beian { margin-top: 2rem; font-size: 0.8125rem; color: var(--text-muted); text-align: center; }
.beian a { color: var(--text-muted); text-decoration: none; }
.beian a:hover { color: var(--text-secondary); text-decoration: underline; }
.text-center { text-align: center; }

/* ── 响应式 ── */
@media (max-width: 639px) {
  .feature-grid { grid-template-columns: repeat(3, 1fr); }
  .qrcode-grid { gap: 1.5rem; }
  .qrcode-card img { width: 110px; height: 110px; }
}