/* 登錄/註冊彈窗響應式 */
@media (max-width: 500px) {
  #custom-login-popup {
    width: 95vw;
    right: -10vw;
    flex-direction: column;
  }
  #custom-login-popup > div {
    width: 100%;
    border-right: 0;
    border-bottom: 1px solid #eee;
    box-sizing: border-box; /* 確保 border 不影響 width */
  }
  #custom-login-popup > div:last-child {
    border-bottom: 0;
  }
}
/* 基本美化 */
#custom-login-popup {
  display: none;
  position: absolute;
  right: 0;
  top: 38px;
  z-index: 9999;
  background: #fff;
  border: 1px solid #eee;
  box-shadow: 0 4px 16px rgba(0,0,0,0.07);
  border-radius: 8px;
  width: 340px;
  overflow: hidden;
  flex-direction: row;
}
#custom-login-popup > div {
  box-sizing: border-box;
}