.watch-video-btn-a{background:#fff; cursor: pointer}
.watch-video-btn-a,
.watch-video-btn-a .watch-video-btn-a-text,
.watch-video-btn a {
    display: block;
    text-decoration: none;
    text-align: left;
    padding-left:10px;
}
.watch-video-btn-a:hover{
    text-decoration: none;
}

/**基本**/
.watch-video-btn::before,
.watch-video-btn::after {
  position: absolute;
  z-index: -1;
  display: block;
  content: '';
}
.watch-video-btn.top-watch::before,
.watch-video-btn.top-watch::after{
    display:none
}
/**基本**/
.watch-video-btn,
.watch-video-btn::before,
.watch-video-btn::after {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  -webkit-transition: all .4s cubic-bezier(.47, .12, .11, .99);
  transition: all .4s cubic-bezier(.47, .12, .11, .99);
}
.watch-video-btn {
  position: relative;
  z-index: 2;
  border: 1px solid #737373;
  color: #282828;
  line-height: 50px;
  overflow: hidden;
  text-align: center;
}
.watch-video-btn:hover {
  color: #fff;
}
.watch-video-btn::after {
  top: -100%;
  width: 100%;
  height: 100%;
}
.watch-video-btn::after {
    top:0;
    left:-100%;
    width:100%;
    height:100%;
}
.watch-video-btn:hover::after {
  top: 0;
  background-color: #737373;
}
.watch-video-btn:hover::after {
    left:0;
    background-color:#737373;
}
.watch-video-btn {
    position: relative;
    display: inline-block;
    width:80%;
    margin-left:11%;
}
.watch-video-btn.top-watch a {
    position: absolute;
    z-index: 1;
    bottom: -80px;
    left: 50%;
    width: 1024px;
    height: 160px;
    margin-left: -512px;
    cursor: pointer;
    -webkit-transition: background-color .4s cubic-bezier(.47, .12, .11, .99);
    transition: background-color .4s cubic-bezier(.47, .12, .11, .99);
    background: rgba(98, 98, 98, .75);
}
.watch-video-btn.top-watch a:before {
    position: absolute;
    top: 5px;
    left: 5px;
    width: calc(100% - 10px);
    height: calc(100% - 10px);
    content: '';
    -webkit-transition: all .4s cubic-bezier(.47, .12, .11, .99);
    transition: all .4s cubic-bezier(.47, .12, .11, .99);
    background: #626262;
}
.watch-video-btn.top-watch a span {
    font-size: 2.4rem;
    font-weight: bold;
    line-height: 1;
    position: absolute;
    top: 50%;
    left: 50%;
    display: block;
    display: inline-block;
    -webkit-box-sizing: content-box;
    box-sizing: content-box;
    -webkit-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    -webkit-transform-origin: top left;
    -ms-transform-origin: top left;
    transform-origin: top left;
    text-align: left;
    letter-spacing: .1em;
    color: #fff;
}
.watch-video-btn.top-watch a span:after {
    position: absolute;
    top: -8px;
    right: -60px;
    width: 40px;
    height: 40px;
    content: '';
    background: url(../images/i_play.svg) no-repeat center;
    background-size: 100% auto;
}
.watch-video-btn.top-watch a:after {
    display: none;
}
.watch-video-btn.top-watch {
    width:100%;
    margin-left:0;
    border:0;
    overflow: unset;
    margin-top:8%;
    height: 160px;margin-top: 1%;
}
.watch-video-btn.top-watch a:hover:before {
    /*top: 15px;
    left: 15px;
    width: calc(100% - 30px);
    height: calc(100% - 30px);*/
    transform: scale(0.99,0.96);
}
.watch-video-btn a, 
.watch-video-btn-a .watch-video-btn-a-text {
    padding: 0% 10%;
    font-size:20px;
    text-decoration: none;
}
.watch-video-btn:hover a,.watch-video-btn:hover a:after, 
.watch-video-btn-a:hover .watch-video-btn-a-text,
.watch-video-btn-a:hover .watch-video-btn-a-text:after  {
    color:#fff;
    transition: 0.3s;
}
.watch-video-btn a:hover {
    color:#fff;
}
/* .watch-video-btn-a .watch-video-btn-a-text:before,
.watch-video-btn a:before {
    display: none;
    content:"";
    position: absolute;
    right: 14.8px;
    top: 52%;
    width: 50px;
    height: 1px;
    background: #737373;
    display: inline-block;
} */
.watch-video-btn-a .watch-video-btn-a-text:after,
.watch-video-btn a:after {
    position: absolute;
    z-index: 1; 
    top: 50%;
    right: 15px;

    width: 32px;
    height: 9px;

    content: '';
    -webkit-transition: right .5s cubic-bezier(.47, .12, .11, .99);
            transition: right .5s cubic-bezier(.47, .12, .11, .99);
    -webkit-transform: translateY(-50%);
        -ms-transform: translateY(-50%);
            transform: translateY(-50%);

    background: url('../images/i_ar.svg') no-repeat center right;
    background-size: 100% auto;
/*     position: absolute;
    top: 42%;
    right: 15px;
    width: 10px;
    height: 10px;
    content: '';
    border-top: 1px solid #282828;
    border-right: 1px solid #282828;
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg); */
}

.watch-video-btn a:hover:before, 
.watch-video-btn-a:hover .watch-video-btn-a-text:before { 
    /* background: #fff; */
/*     right: 10px;
    background: url('../images/i_ar_btn_bk_on.svg') no-repeat right center;
    background-size: auto 100%; */
}
.watch-video-btn a:hover:after,
.watch-video-btn-a:hover .watch-video-btn-a-text:after {
/*     border-top: 1px solid #fff;
    border-right: 1px solid #fff; */
    right: 10px;
    background: url('../images/i_ar_btn_bk_on.svg') no-repeat right center;
    background-size: auto 100%;
}