* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    margin: 0;
    min-width: 400px;
}

/* 设置背景图片 */
#web_bg {
    position: fixed;
    z-index: -999;
    width: 100%;
    height: 100%;
    background-image: url(../img/background.png);
    background-attachment: local;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
}

.body {
    max-width: 1000px;
    margin: auto;
    padding: 50px 0;
}

.Htext {
    text-align: center;
    color: white;
    font-size: 3rem;
    padding-bottom: 10px;
    animation: identifier 5s forwards;
    border-bottom: 2px dashed black;
}

@keyframes identifier {
    from {
        letter-spacing: -40px;
        filter: blur(10px);
    }

    to {
        letter-spacing: 0px;
        filter: blur(0px);
    }
}


.ls {
    padding: 20px;
}

.nr {
    background-color: rgba(255, 255, 255, 0.361);
    padding: 5px 10px;
    position: relative;
    border-left: 3px solid #007d6f;
    border-bottom: 3px solid #007d6f;
    border-bottom-left-radius: 20px;
    border-top-right-radius: 20px;
    margin-bottom: 20px;
}

.shang_qiu {
    width: 10px;
    height: 10px;
    background-color: #007d6f;
    border-radius: 50%;
    position: absolute;
    top: 0;
    left: 0;
    margin-top: -10px;
    margin-left: -6.5px;
}

.xia_qiu {
    width: 10px;
    height: 10px;
    background-color: #007d6f;
    border-radius: 50%;
    position: absolute;
    bottom: 0;
    right: 0;
    margin-bottom: -6.5px;
    margin-right: -10px;
}

.shang {
    display: inline-block;
    border-bottom: 2px solid #007d6f;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.shang>span {
    margin-left: 10px;
    color: rgb(104, 255, 53);
    font-size: 12px;
}

.nr>ol {
    margin-left: 25px;
}

.nr>ol>li {
    margin-top: 5px;
}

.nr ul {
    margin-left: 20px;
}

.nr ul>li {
    margin: 3px 0;
}