@charset "utf-8";

html,
body{
    height: 100%;
    width: 100%;
    margin: 0;
    padding: 0;
}

.bg {
    background-image: url(back3.gif);
    background-repeat: repeat;
}

.a1{
    font-size: 3rem;
    font-family: SimSun;
    padding: 0;
    margin: 0;
    text-align: center;
    font-weight: 750;
    color:#FFFFFF;
}

.a2{
    font-size: 1.5rem;
    font-family: SimSun;
    padding: 0;
    margin: 0;
    font-weight: 400;
    color:darkslateblue;
}

.content{
    max-width: auto;
    margin-left: 2rem;
    padding: 0 2rem;
    margin-right: 2rem;
}

a {
    color: darkslateblue;
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: mediumspringgreen;
    text-decoration: underline;
}

a:visited {
    color: darksalmon;
}

.blank{
    width: 100%; 
    height: 4rem; 
    margin-bottom: 3rem;
}

.header {
    width: 100%;
    height: 8em;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(0.45rem);
    display: flex;
    align-items: center;
    justify-content: center;
}

button{
    font-size: 1rem;
    padding: 0.8rem 1.6rem;
    border: none;
    cursor: pointer;
    border-radius: 0.25rem;
    background-color: rgba(0, 0, 0, 0.5 );
    backdrop-filter: blur(0.25rem);
    box-shadow: 0 0.25rem 1.875rem rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
    color: #FFFFFF;
}

p{
    font-family: SimSun;
    font-weight: 600;
    color:darkslateblue;
    font-size: 2rem;
}