@charset "UTF-8";
html,body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.wrapper {
	position: relative;
	width: 100%;
	height: 100%;
	background: url("./images/bg.png") no-repeat;
	background-size: 100% 100%;
    overflow: hidden;
}

.top-nav {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    line-height: 60px;
    padding-left: 20px;
	background: url("./images/top_bg.png") no-repeat;
	background-size: 100% 100%;
}
.top-nav .logo {
    width: 50px;
}
.top-nav .system-name {
    display: inline-block;
    min-width: 200px;
    height: 100%;
    line-height: 60px;
    margin-left: 20px;
    background: url("./images/top_title_bg.png") no-repeat;
    background-size: 200px 60px;
    background-position: 0;
}
.top-nav .system-name .name {
    width: 240px;
}

.content {
    position: absolute;
    width: 100%;
    height: 100%;
}
.content .btn-group {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.content .btn-group .btn {
    float: left;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 300px;
    height: 300px;
    border-radius: 8px;
    background: rgba(190, 0, 0, 0.80);
	background-image: url("./images/top_title_bg.png");
    background-repeat: no-repeat;
    background-size: 150% 68%;
    background-position: -140px 0;
}
.content .btn-group .btn:hover {
    background: rgba(190, 0, 0, 0.9);
	background-image: url("./images/top_title_bg.png");
    background-repeat: no-repeat;
    background-size: 150% 68%;
    background-position: -140px 0;
}
.content .btn-group .btn:first-child {
    margin-right: 40px;
    background-position: 0;
}
.content .btn-group .btn .icon {
    display: block;
    width: 160px;
    height: 160px;
	background: url("./images/m.png") no-repeat;
	background-size: 100% 100%;
}
.content .btn-group .btn .m-side {
	background: url("./images/m.png") no-repeat;
	background-size: 100% 100%;
}
.content .btn-group .btn .c-side {
	background: url("./images/c.png") no-repeat;
	background-size: 100% 100%;
}
.content .btn-group .btn .name {
    display: block;
    font-size: 30px;
    color: #FFF;
}