.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-toggle {
  background: #ff6600;
  color: #fff;
  padding: 10px 20px;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  font-size: 16px;
}

.dropdown-menu {
  display: none;
  position: absolute;
  right: 0;
  top: 110%;
  background: #fff;
  list-style: none;
  padding: 5px 0;
  margin: 0;
  min-width: 120px;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
  z-index: 999;
}

.dropdown-menu li a {
  display: block;
  padding: 8px 15px;
  text-decoration: none;
  color: #333;
}

.dropdown-menu li a:hover {
  background: #f2f2f2;
}

/* 点击按钮才展开 */
.dropdown.show .dropdown-menu {
  display: block;
}


.ico{
  width: 120px;height: 120px;margin-left: 75px;margin-bottom: 10px;
}

@media screen and (max-width: 768px) {
  .ico{
      width: 120px;height: 120px;margin: 0 auto;
      
  }
  
}