.symbol-content {
  background: #fff;
  border-radius: var(--border-radius);
  padding: 24px;
  margin-top: 20px;
  box-shadow: var(--shadow);
}

.symbol-section {
  margin-bottom: 32px;
}

.symbol-section:last-child {
  margin-bottom: 0;
}

.symbol-section h2 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}

.symbol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
  gap: 10px;
}

.symbol-item {
  background: var(--gray-50);
  border: 2px solid var(--gray-200);
  border-radius: 8px;
  padding: 12px 8px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 1.5rem;
  color: var(--gray-700);
  user-select: all;
  position: relative;
}

.symbol-item:hover {
  border-color: var(--primary);
  background: #eef2ff;
  transform: translateY(-2px);
  box-shadow: 0 4px 6px rgba(79, 70, 229, 0.1);
}

.symbol-item:active {
  transform: translateY(0);
}

.symbol-item.copied {
  border-color: var(--secondary);
  background: #ecfdf5;
}

.symbol-item.copied::after {
  content: '已复制';
  position: absolute;
  top: -25px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--secondary);
  color: white;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  white-space: nowrap;
  animation: fadeInOut 1.5s ease-in-out;
}

@keyframes fadeInOut {
  0% { opacity: 0; transform: translateX(-50%) translateY(5px); }
  20% { opacity: 1; transform: translateX(-50%) translateY(0); }
  80% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(-5px); }
}

/* 工具导航和友情链接样式 */
.links-section {
  background: #fff;
  border-radius: var(--border-radius);
  padding: 24px;
  margin-top: 20px;
  box-shadow: var(--shadow);
}

.links-section h2 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 16px;
}

.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.links-grid a {
  color: var(--gray-600);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 6px;
  transition: all 0.2s ease;
  font-size: 0.95rem;
}

.links-grid a:hover {
  color: var(--primary);
  background: var(--gray-50);
}

/* 页脚样式 */
footer {
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--gray-200);
  color: var(--gray-500);
  font-size: 0.9rem;
}

footer .copyright {
  margin-top: 8px;
}

footer a {
  color: var(--primary);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* 响应式调整 */
@media (max-width: 640px) {
  .symbol-grid {
    grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
    gap: 8px;
  }
  
  .symbol-item {
    padding: 10px 6px;
    font-size: 1.3rem;
  }
  
  .links-grid {
    grid-template-columns: 1fr;
  }
}