* {
  margin: 0;
  padding: 0;
}
li {
  list-style: none;
}
body,
.home {
  width: 100vw;
  overflow-x: hidden;
}
.top {
  padding-bottom: 7rem;
  width: 100%;
  background-image: url('http://ww.payzhifu.com/back.png');
  background-size: 100% 100%;
  background-repeat: no-repeat;
}
.title {
  max-width: 100%;
  padding: 1rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.title img {
  width: 15vw;
  margin-left: 2%;
}
.title p {
  font-size: 2.2vw;
  color: red;
  font-weight: bold;
  margin-right: 2%;
}
.content {
  width: 63%;
  margin: 0 auto;
  display: flex;
}
.content .feng_img {
  height: 18rem;
  margin-top: 4rem;
}
.content .jieshao {
  margin-top: 8vw;
  margin-left: 4vw;
}
.content .jieshao .name {
  font-size: 2rem;
  font-weight: bold;
  color: black;
}
.content .jieshao span {
  margin: 15px 0;
  width: 5vw;
  height: 5px;
  display: inline-block;
  background-color: red;
}
.content .jieshao p {
  font-size: 1rem;
  color: #666666;
  letter-spacing: 2px;
  line-height: 35px;
}
.on_li {
  cursor: pointer;
}
.sy_mp4 {
  width: 65%;
  margin-left: 17.5%;
  margin-top: -1vw;
}
.sy_mp4 .mp4_header {
  width: 100%;
  margin-bottom: -0.8vw;
}
.sy_mp4 .mp4_body {
  padding: 0.2%;
  display: flex;
  border: 1px solid #152e7e;
  background-color: white;
  box-shadow: 3px 2px 7px 1px #807a7a40;
}
.sy_mp4 .video_data {
  position: relative;
  width: 65%;
}
.sy_mp4 .video_play {
  position: absolute;
  width: 5%;
  margin-left: 18%;
  margin-top: 9%;
}
.sy_mp4 video {
  margin: 1vw;
}
.sy_mp4 .video_list {
  margin: 1vw;
  margin-left: 0;
  background-color: #f6f5fa;
  position: relative;
  width: 35%;
}
.sy_mp4 .video_list .video_title {
  background-color: #f6f5fa;
  font-size: 1.2rem;
  padding: 0.5rem 0 0.5rem 1rem;
}
.sy_mp4 .video_list ul {
  padding-left: 1rem;
}
.sy_mp4 .video_list ul li {
  padding: 0.7rem 0;
  color: #999;
  letter-spacing: 1.5px;
  display: flex;
  align-items: center;
}
.sy_mp4 .video_list ul li img {
  width: 25px;
  margin-right: 3px;
}
.sy_mp4 .video_list ul li:nth-child(1) {
  color: red;
}
.sy_mp4 .video_list ul li:hover {
  color: red;
}
.sy_mp4 .video_bottom {
  position: absolute;
  bottom: 3vw;
  width: 10vw;
  color: white;
  text-align: center;
  left: 50%;
  padding: 0.3rem 0;
  transform: translate(-50%, -50%);
  border-radius: 1rem;
  background-color: red;
}
.server {
  width: 75%;
  margin-left: 50%;
  transform: translate(-50%, -40%);
}
.model {
  width: 65%;
  display: flex;
  margin-left: 15%;
  margin-bottom: 3%;
}
.model .zhongzhi {
  margin-top: 1%;
  position: relative;
}
.model .zhongzhi .zitis {
  position: absolute;
  width: 75%;
  margin-top: -6%;
  z-index: -10;
}
.model .zhongzhi .zz_txt {
  font-size: 2.2rem;
  font-weight: bold;
  color: black;
}
.model .zhongzhi span {
  margin: 20px 0;
  width: 2.5rem;
  height: 3.5px;
  display: block;
  background-color: red;
}
.model .zhongzhi p {
  font-size: 0.9rem;
  color: #666666;
  letter-spacing: 1px;
  line-height: 22px;
}
.model img {
  width: 45%;
  margin-right: 4%;
}
.by_buttom {
  display: block;
  width: 100vw;
}

/* 媒体查询，针对手机端样式调整 */
@media only screen and (max-width: 768px) {
  .title img {
    width: 30vw;
  }
  .title p {
    font-size: 4vw;
  }
  .content {
    width: 90%;
    flex-direction: column;
    align-items: center;
  }
  .content .feng_img {
    height: auto;
    width: 50%;
    margin-top: 2rem;
  }
  .content .jieshao {
    margin-top: 2rem;
    margin-left: 0;
    text-align: center;
  }
  .content .jieshao .name {
    font-size: 1.5rem;
  }
  .content .jieshao span {
    width: 10vw;
  }
  .content .jieshao p {
    font-size: 0.9rem;
    line-height: 25px;
  }
  .sy_mp4 {
    width: 90%;
    margin-left: 5%;
  }
  .sy_mp4 .mp4_body {
    flex-direction: column;
  }
  .sy_mp4 .video_data {
    width: 100%;
  }
  .sy_mp4 .video_list {
    width: 100%;
    margin-top: 1rem;
  }
  .model {
    width: 90%;
    margin-left: 5%;
    flex-direction: column;
    align-items: center;
  }
  .model img {
    width: 80%;
    margin-right: 0;
    margin-bottom: 1rem;
  }
  .model .zhongzhi {
    text-align: center;
  }
  .model .zhongzhi .zitis {
    width: 100%;
    margin-top: -4%;
  }
}