.forScreenReader{
    /* 针对仅屏幕阅读器可见的文字 */
    color:rgba(0, 0, 0, .0);
    font-size: 1px;
}
.seen{filter: blur(20px);}
.mod{
    margin: 0 10%;
    text-align: center;
    height: auto;
}
.block{
    margin: 5% 30px;
    padding: 2%;
    border: 3px solid #5dbd90;
}
.block h2{
    color: #5dbd90;
}
.title{
    color: #5dbd90;
    padding: 20px 30px 20px;
    margin: 0;
    font-size: 1.8em;
}
.topbar{
    position: relative;
    -webkit-box-shadow: 0 1px 5px rgba(0,0,0,.5);
    -moz-box-shadow: 0 1px 5px rgba(0,0,0,.5);
    box-shadow: 0 1px 5px rgba(0, 0, 0, .5);
    z-index: 1;
}
.topbar-fill{
    max-width: 1000px;
    margin: 0 auto;
}
::-moz-selection {
    color: #000;
    background-color: rgb(172, 98, 98);
}

::selection {
    color: #000;
    background-color: rgb(255, 249, 167);
}
body{
    font-family:'Noto Serif SC', Microsoft YaHei,-apple-system, SF UI Text,Arial,PingFang SC,Hiragino Sans GB,WenQuanYi Micro Hei,sans-serif;
    font-weight: 300;
}
.main{
    max-width:1000px;
    margin: 20px auto;
    padding: 10px 30px;
    color: #333;
    font-size: 1.3em;
    width: auto;
    height: auto;
    line-height: 30px;
}
.main strong{
    color: #217257;
}
small{
    color:#A4A2A2;
    text-align: center;
}
.img-box{
    margin-bottom: 20px;
}
.thumb{
    position: relative;
    z-index: 0;
    /* filter:blur(20px); */
    margin-top: 20px;
}
.main h2::before{
    content:'';
    display: inline-block;
    width: 0.8em;
    height: 0.8em;
    background-image: url('/sub/shape/sharp.svg');
    background-size: 0.8em 0.8em;
    vertical-align: baseline;
    margin-right: 0.15em;
    background-repeat: no-repeat;
}
.main small::before{
    content:'';
    display: inline-block;
    width: 0.8em;
    height: 0.8em;
    background-image: url('/sub/shape/triangle.svg');
    background-size: 0.8em 0.8em;
    vertical-align: baseline;
    margin-right: 0.15em;
    background-repeat: no-repeat;
}
.main li small::before{
    content: '';
}
.main h3{
    border-left: 8px solid #eb5055;
    padding: 4px 10px;
}
.header-thumb{
    position: relative;
    width: 100%;
    height: 300px;
    background-color: #b5fff1;
    margin-bottom: 30px;
}
.header-title{
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    top: 100px;
    color: white;
    padding: 10px 40px;
}
.tip{
    width: inherit;
    height: auto;
    margin: 10px 0;
    color: brown;
    font-weight: bold;
    background: linear-gradient(#fff 25%, #fff) no-repeat 50% 50%, linear-gradient(-45deg, #f7f7f7 25%, #fff 25%, #fff 50%, #f7f7f7 50%, #f7f7f7 75%, #fff 75%, #fff);
    background-size: 95% 100% , 20px 20px;
    padding: 20px 5%;
}
.header-img{
    position: absolute;
    width: 100%;
    height: 300px;
    background-position: center;
    background-size: cover;
}
.no1{background-image: url('../sub/img/1-bg.jpg');}
.no2{background-image: url('../sub/img/2-bg.jpg');}
.no3{background-image: url('../sub/img/3-bg.jpg');}
.ex-rd{background-image: url('../sub/img/exrd-bg.jpg');}
.contraceptive{background-image: url('../sub/extended-reading/img/contraceptive.jpg');}

.header-cover{
    position: relative;
    width: 100%;
    height: 300px;
    background-color: rgba(0,0,0,.3);
    -webkit-box-shadow: 0 1px 5px rgba(0,0,0,.3);
    -moz-box-shadow: 0 1px 5px rgba(0,0,0,.3);
    box-shadow: 0 1px 5px rgba(0,0,0,.3);
}
.topbar a:link {text-decoration:none;}
.topbar a:visited {text-decoration:none;}
.topbar a:hover {text-decoration:none;}
.topbar a:active {text-decoration:none;}
.header-thumb a:link {text-decoration:none;}
.header-thumb a:visited {text-decoration:none;}
.header-thumb a:hover {text-decoration:none;}
.header-thumb a:active {text-decoration:none;}
.cover{
    position: fixed;
    top:0;
    left:0;
    z-index: 5;
    width: 100%;
    height: 100%;
    /* filter: blur(300px); */
    background-color: rgba(0, 0, 0, .3);
}
.warn{
    max-width: 700px;
    margin:20% auto;
    padding: 30px;
    color:white;
    font-size: 2em;
    font-weight: bold;
}
.lf{
    font-size: smaller;
}
.xef{background-color: #548235;color:white;}
.ef{background-color: #c6e0b4;}
.wa{background-color: #fff2cc;}
.da{background-color: #f4b084;}

video{
    width: 100%;
}

.collapse, .collapsing{
    border: solid 1px #CCC;
    border-radius: 8px;
    padding: 20px 10px;
}