* {
    margin: 0;
    padding: 0;
}

html,
body {
    width: 100vw;
    height: 100%;
    text-align: center;
    overflow-x: hidden;
}

#app {
    width: 100vw;
    height: 100%;
    font-size: 10px;
}

a {
    text-decoration: none;
}

ul > li {
    list-style: none;
}

.app_top {
    background-image: url('../img/bgd_top.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
    width: 100vw;
    height: 28.7em;
    position: relative;
}

.app_top .btn_position {
    width: 4.4em;
    position: absolute;
    right: 24px;
    top: 13px;
    font-size: 1.4em;
    text-align: center;
}

.select_down {
    width: 0.4em;
    height: 0.4em;
    border-bottom: 0.15em solid #ffffff;
    border-right: 0.15em solid #ffffff;
    transform: rotate(45deg);
    position: absolute;
    right: -9px;
    top: 4px;
}

.btn_position .btn {
    width: 56px;
    height: 22px;
    line-height: 22px;
    border: 1px solid #ffffff;
    text-align: center;
    border-radius: 4px;
    margin-bottom: 7px;
}

.select {
    -webkit-appearance: none;
    appearance: none;
    border: none;
    width: 100%;
    -webkit-box-sizing: unset;
    box-sizing: unset;
    color: white;
    background: transparent;
    text-align: center;
    outline: none;
    font-size: 14px;
}

.select option {
    background: white;
    color: #444;
}

.select option:checked {
    background: #40a9ff;
    color: white;
}


#logo {
    margin-top: 7.8em;
    /* transform: translateY(120%); */
}

.app_top .text {
    margin-top: 7em;
}

.app_top .text .tx1 {
    font-size: 2em;
    font-family: PingFang SC, PingFang SC-Bold;
    font-weight: 700;
    text-align: center;
    color: #333333;
}

.app_top .text .tx1.test {
    color: red;
    display: none;
}

.app_top .text .tx2 {
    width: 128px;
    height: 20px;
    font-size: 1.4em;
    font-family: PingFang SC, PingFang SC-Regular;
    font-weight: 400;
    text-align: center;
    color: #999999;
}

.app_top .text .tx3 {
    font-size: 2em;
    font-family: PingFang SC, PingFang SC-Bold;
    font-weight: 700;
    text-align: center;
    color: #333333;
}

.app_content {
    margin-top: 3em;
}

.app_content .download_list {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-bottom: 6em;
}

.app_content .download_list li {
    width: 80vw;
    height: 6.8em;
    opacity: 1;
    background: #ffffff;
    border: 1px solid #eeeeee;
    border-radius: 10px;
    margin-bottom: 1.2em;
    display: flex;
    align-items: center;
    position: relative;
}

.app_content .download_list .download_logo {
    margin-left: 10px;
}

.app_content .download_list .download_logo > img {
    width: 56px;
    height: 56px;
    border-radius: 15%;
}

.app_content .download_list .download_content {
    margin-left: 14px;
}

.app_content .download_list .download_title {
    font-size: 1.8em;
    font-family: PingFang SC, PingFang SC-Bold;
    font-weight: 700;
    text-align: left;
    color: #333333;
    margin-bottom: 2px;
}

.app_content .download_list .download_description {
    font-size: 1.4em;
    font-family: PingFang SC, PingFang SC-Regular;
    font-weight: 400;
    text-align: left;
    color: #999999;
}

.download_link_right {
    width: 10px;
    height: 10px;
    border-top: 2px solid #999999;
    border-right: 2px solid #999999;
    transform: rotate(45deg);
    position: absolute;
    right: 17px;
}

.isClick {
    background: #ffffff;
    color: #ff4800;
}

.app_content .download_list .download_li {
    display: none;
}

.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    text-align: center;
    font-size: 12px;
    font-family: PingFang SC, PingFang SC-Regular;
    font-weight: lighter;
    color: #999999;
    background: white;
    padding: 10px;
}

.footer_a {
    color: #bbb;
}

footer a:hover {
    text-decoration: underline;
}