html {
    margin: 0px;
    padding: 0px;
}

body {
    margin: 0px;
    padding: 0px;
    background-color: gray;
    color: rgb(43, 43, 43);
    font-family: siyuan;
    font-weight: 200;
}


.banner {
    padding-top: 50px;
    padding-bottom: 50px;
}

.banner-title {
    padding: 0px;
    margin: 0px;
}

.banner-title-1 {
    font-size: 36px;
    font-family: siyuan-heavy;
    font-weight: 3500;
    color: rgb(97, 192, 255);
}

.banner-title-2 {
    font-size: 50px;
    font-family: siyuan-heavy;
    font-weight: 500;
    margin-top: 1px;
    margin-bottom: 10px;
}

.banner-title-3 {
    font-size: 22px;
    font-weight: 200;
    margin-bottom: 20px;
}


.btn {
    padding: 10px;
    font-size: 12px;
    border-radius: 32px;
    padding-left: 20px;
    padding-right: 20px;
    cursor: pointer;
}



.btn-download {
    background-color: rgb(97, 192, 255);
    color: whitesmoke;
}

.btn-download:hover {
    background-color: rgb(61, 177, 255);
}

.btn-download:active {
    background-color: rgb(30, 165, 255);
}


.content-box {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
}


.download-list {
    margin-top: 50px;
}

.download-title {
    background-color: darkgray;
    color: whitesmoke;
    font-size: 19px;
    padding: 5px;
}

.download-tr {
    border-bottom-color: darkgray;
    border-bottom-style: solid;
    border-bottom-width: 1px;
    display: table-row;
    background-color: rgb(218, 218, 255);
}

.download-th {
    text-align: left;
    padding: 9px;
}

.download-td {
    padding-right: 30px;
    padding: 9px;
    font-size: 13px;
    font-weight: 400;
}


.feature-list {
    display: flex;
    flex-direction: row;
    justify-items: start;
    align-items: start;
    padding: 0px;
}

.feature-list-item {
    display: inline-block;
    padding: 20px;
    margin-right: 20px;
    background-color: rgb(231, 231, 231);
    border-radius: 8px;
    width: 32%;
    min-height: 80px;
}

.feature-list-item-description {
    font-weight: 300;
    font-size: 15px;
    color: gray;
}

.feature-list-item-title {
    font-weight: 600;
    font-size: 20px;
    margin-bottom: 5px;
}


.footer {
    text-align: center;
    padding: 30px;
}


.footer-beian-info {
    font-size: 10px;
}

.footer-copyright-info {
    font-size: 15px;
}

.header {
    background-color: gray;
    border-bottom-color: rgb(97, 97, 97);
    border-bottom-style: solid;
    border-bottom-width: 1px;
    position: fixed;
    width: 100vw;
}

.header-content {
    display: flex;
    flex-direction: row;
    justify-items: center;
    align-items: center;
}

.header-link-icon-image {
    max-width: 25px;
    max-height: 25px;
}

.header-link-list {
    display: flex;
    flex-direction: row;
    margin: 0px;
    justify-items: center;
    align-items: center;
}

.header-link-list-item {
    display: inline-block;
    /* margin-left: 10px; */
    padding: 10px;
}


.header-title {
    color: whitesmoke;
    padding: 0px;
    margin: 0px;
    font-size: 20px;
    font-family: deyihei;
    font-weight: 500;
}

.header-title-link:link {
    text-decoration: none;
    color: whitesmoke;
}

.main {
    background-color: whitesmoke;
    padding-top: 100px;
    padding-bottom: 100px;
}

.spring {
    flex-grow: 1;
}