.contact-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.contact-card {
  background-color: var(--card-bg, #ffffff);
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  color: var(--text-color, #1f2937);
}

.contact-card-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color, #e5e7eb);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.contact-card-title {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--primary-color, #3b82f6);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.25rem;
}

.contact-card-title h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-color, #1f2937);
}

.contact-card-title p {
  margin: 0.25rem 0 0;
  color: var(--text-muted, #6b7280);
  font-size: 0.875rem;
}

.contact-card-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted, #6b7280);
  padding: 0.5rem;
  transition: color 0.2s;
}

.contact-card-close:hover {
  color: var(--text-color, #1f2937);
}

.contact-card-content {
  padding: 1rem;
}

.contact-item {
  padding: 1rem 0;
}

.contact-platform {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.contact-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.contact-icon img {
  width: 20px;
  height: 20px;
}

.contact-button {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color, #e5e7eb);
  border-radius: 6px;
  background: none;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s;
  color: var(--text-color, #1f2937);
}

.contact-button:hover {
  border-color: var(--primary-color, #3b82f6);
  background-color: var(--hover-color, #f3f4f6);
}

.contact-platform-name {
  font-weight: 500;
}

.contact-id {
  color: var(--text-muted, #6b7280);
  font-size: 0.875rem;
}

.contact-copy {
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-muted, #6b7280);
  transition: color 0.2s;
}

.contact-copy:hover {
  color: var(--primary-color, #3b82f6);
}

.contact-description {
  color: var(--text-muted, #6b7280);
  font-size: 0.875rem;
  margin-left: 3.5rem;
}

hr {
  border: none;
  border-top: 1px solid var(--border-color, #e5e7eb);
  margin: 0.5rem 0;
}

/* 亮色主題 */
:root {
  --card-bg: #ffffff;
  --text-color: #1f2937;
  --text-muted: #6b7280;
  --border-color: #e5e7eb;
  --hover-color: #f3f4f6;
  --primary-color: #3b82f6;
}

/* 深色主題 - 使用 Tailwind stone 色系 */
.dark {
  --card-bg: #1c1917; /* stone-900 */
  --text-color: #fafaf9; /* stone-50 */
  --text-muted: #a8a29e; /* stone-400 */
  --border-color: #44403c; /* stone-700 */
  --hover-color: #292524; /* stone-800 */
  --primary-color: #78716c; /* stone-500 */
}