.g_slide {
  position: relative;
  width: 100%;
  overflow: hidden;
  display: table;
  margin: 0 auto;
  padding: 0;
  height: auto;
}

.g_slide img {
  width: 100%;
  display: table;
  margin: 0 auto;
  padding: 0;
}

.g_slide .item {
  display: none;
  position: absolute;
  left: 0;
  top: 0;
}

.switch_main {
  position: relative;
}

.bnn {
  width: 100%;
  display: table;
  height: 35vw;
}

.switch_main a {
  display: table;
  height: auto;
  width: 100%;
}

.g_slide .switch_nav {
  width: 100%;
  position: absolute;
  right: 0;
  bottom: 10px;
  z-index: 11;
  text-align: center;
}

.g_slide .switch_nav_item {
  display: none;
}

.g_slide .prev,
.g_slide .next {
  position: absolute;
  top: 40%;
  z-index: 10;
  width: 18px;
  height: 30px;
  overflow: hidden;
  background: url(slide.png) no-repeat;
  transition: margin-left .3s ease, margin-right .3s ease;
}

.g_slide .prev {
  left: -18px;
  _left: 10px;
}

.g_slide .next {
  right: -18px;
  _right: 10px;
  background-position: -19px 0;
}

.g_slide .prev:hover {
  background-position: 0 -70px;
}

.g_slide .next:hover {
  background-position: -19px -70px;
}

.g_slide:hover .prev {
  margin-left: 50px;
}

.g_slide:hover .next {
  margin-right: 50px;
}

.switch_main {
  position: relative;
}