.mobile_nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  height: 100%;
  background: #fff;
  z-index: 1000;
  transition: right 0.3s ease;
  overflow-y: auto;
  box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
}

.mobile_nav.active {
  right: 0;
}

.mobile_mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  display: none;
}

.mobile_mask.active {
  display: block;
}

.mobile_nav .nav_content {
  padding: 20px;
}

.mobile_nav .items {
  border-bottom: 1px solid #eee;
  margin-bottom: 10px;
}

.mobile_nav .items .li_a {
  display: block;
  padding: 15px 0;
  font-size: 16px;
  color: #333;
  position: relative;
  transition: all 0.3s ease;
}

.mobile_nav .items .li_a:after {
  content: '';
  width: 12px;
  height: 12px;
  position: absolute;
  right: 10px;
  top: 50%;
  background: url('../img/p40.png') center no-repeat;
  background-size: contain;
  transform: translateY(-50%);
  transition: all 0.3s ease;
}

.mobile_nav .items.active .li_a:after {
  transform: translateY(-50%) rotate(-135deg);
}

.mobile_nav .two_ment {
  display: none;
  padding: 0 15px;
  background: #f8f8f8;
  border-radius: 8px;
}

.mobile_nav .two_ment .item {
  padding: 10px 0;
}

.mobile_nav .two_ment .tt {
  font-size: 15px;
  color: #666;
  padding: 8px 0;
  position: relative;
  cursor: pointer;
}

.mobile_nav .two_ment .tt:after {
  content: '';
  width: 10px;
  height: 10px;
  position: absolute;
  right: 10px;
  top: 50%;
  background: url('../img/p40.png') center no-repeat;
  background-size: contain;
  transform: translateY(-50%);
  transition: all 0.3s ease;
}

.mobile_nav .there_ment {
  display: none;
  padding-left: 15px;
}

.mobile_nav .item.active .there_ment {
  display: block;
}

.mobile_nav .there_ment .ttt {
  font-size: 14px;
  color: #888;
  padding: 8px 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile_nav .there_ment .ttt:after {
  content: '';
  width: 10px;
  height: 10px;
  position: absolute;
  right: 10px;
  background: url('../img/p40.png') center no-repeat;
  background-size: contain;
  transform: translateY(-50%);
  transition: all 0.3s ease;
}

.mobile_nav .ch_lt.active .ttt:after {
  transform: rotate(-135deg);
}

.mobile_nav .four_ment {
  display: none;
  padding-left: 15px;
}

.mobile_nav .ch_lt.active .four_ment {
  display: block;
}

.mobile_nav .four_ment ul li {
  padding: 8px 0;
}

.mobile_nav .four_ment ul li a {
  color: #999;
  font-size: 13px;
  transition: color 0.3s ease;
}

.mobile_nav .four_ment ul li a:hover {
  color: #333;
}