* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, "PingFang SC", sans-serif; color: #2D3142; }

/* 移动端适配 */
@media (max-width: 768px) {
  .nav-links { gap: 12px !important; font-size: 13px !important; }
  .grid-3 { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)) !important; }
  .together-card .days { font-size: 32px !important; }
  .message .bubble { max-width: 80% !important; }
  .modal-box { padding: 20px !important; max-width: 95% !important; }
  .sidebar { width: 60px !important; }
  .sidebar .conv-item .title { display: none; }
  .sidebar .logo { font-size: 14px !important; }
}