#wrapper {
    width: 85%;
    max-width: 1200px;
    min-width: 900px;
    margin: 70px auto 100px;
}

#top {
    width: 104%;
    margin-left: -1.5%;
    position: relative;
    z-index: 1;
    height: 120px;
}

/*#main {
    position: relative;
    z-index: 1;
}*/

#main .nav-header {
    margin-left: -0.8%;
}

.nav-header-menu {
    float: left;
    position: relative;
    left: 50%;
}

.nav-header-menu li {
    float: left;
    position: relative;
    left: -50%;
    text-align: center;
    height: 40px;
    line-height: 40px;
    padding: 0px 20px;
    font-size: 15px;
}

.nav-header-menu li > a {
    display: block;
    height: 100%;
    color: #000;
    opacity: 0.5;
}

.nav-header-menu li.active > a {
    color: #333;
    /* 解决点击出现外边框的问题 */
    outline: medium;
    border-bottom: 1px solid #333;
    height: 39px;
    opacity: 1;
}

.nav-header-menu li.active::after {
    display: none;
}

.nav-body {
    position: relative;
    left: 1px;
    top: 20px;
    margin-left: -0.8%;
}


/** 背景透明时的样式 */

.light .nav-header-menu li>a {
    color: #fff;
    opacity: 0.5
}

.light .nav-header-menu li.active > a {
    border-bottom-color: #fff;
    opacity: 1;
}

.light .thumbnail-container {
    background-color: rgba(255, 255, 255, .3);
    border: 1px solid rgba(255, 255, 255, 0.15);
    background-image: none;
}

#wallpapers {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    min-width: 1000px;
    z-index: -10;
    background-position: center bottom;
    background-repeat: no-repeat;
    background-size: cover;
    background-color: #e2ebf8;
}

#wallpapers video {
    display: none;
    min-width: 100%;
    min-height: 100%;
}


/* 阻止滚动事件加模糊效果 */

.mask {
    overflow-y: hidden;
    padding-right: 17px;
}

.mask #top,
.mask #main,
.mask footer {
    -webkit-filter: blur(8.2px);
}