body .ly_header_12 .nav ul li:hover {background-color:#c40c24;}
body .ly_header_12 .nav ul li a:hover{color:#ffffff;}
/* 只对有子菜单的 li > a 添加箭头 */
li.has_sec > a::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-left: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translate(0, -50%) rotate(-45deg);
  margin-left: 8px;
  vertical-align: middle;
  transition: transform 0.3s ease;
  color: inherit; /* 继承 a 标签文字颜色 */
}

/* 展开状态：旋转成向上箭头（^） */
li.has_sec.expanded > a::after {
  transform: translate(0, -50%) rotate(135deg);
}