* {
    box-sizing: border-box;
}

body {
    margin: 0;
}

* {
    box-sizing: border-box;
}

body {
    margin-top: 0px;
    margin-right: 0px;
    margin-bottom: 0px;
    margin-left: 0px;
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Roboto, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft Yahei", "Microsoft Jhenghei", sans-serif;
}

.panel {
    width: 90%;
    max-width: 700px;
    border-top-left-radius: 12px;
    border-top-right-radius: 12px;
    border-bottom-right-radius: 12px;
    border-bottom-left-radius: 12px;
    padding-top: 30px;
    padding-right: 50px;
    padding-bottom: 30px;
    padding-left: 50px;
    margin-top: 50px;
    margin-right: auto;
    margin-left: auto;
    margin-bottom: 40px;
    color: rgb(51, 51, 51);
    font-weight: 100;
}

.welcome {
    text-align: center;
    font-weight: 100;
    margin-top: 0px;
    margin-right: 0px;
    margin-bottom: 0px;
    margin-left: 0px;
    font-size: 22px;
}

.logo path {
    pointer-events: none;
    fill: none;
    stroke-linecap: round;
    stroke-width: 7;
    stroke: rgb(255, 255, 255);
}

.big-title {
    text-align: center;
    font-size: 2.66rem;
    margin-top: 26px;
    margin-right: 0px;
    margin-bottom: 26px;
    margin-left: 0px;
    color: rgb(24, 144, 255);
    font-weight: 400;
}

.description {
    text-align: center;
    font-size: 1rem;
    line-height: 1.8rem;
    margin-bottom: 1rem;
}

.wechat-group {
    text-align: center;
    padding-bottom: 10px;
}

.wechat-group img {
    max-width: 220px;
    height: auto;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    border-bottom-right-radius: 8px;
    border-bottom-left-radius: 8px;
    margin-top: 0px;
    margin-right: auto;
    margin-bottom: 0px;
    margin-left: auto;
    width: 100%;
}

.welcome-img {
    padding-top: 20px;
    padding-right: 0px;
    padding-bottom: 20px;
    padding-left: 0px;
    text-align: center;
}

.welcome-img img {
    width: 100%;
}

@media (max-width: 767.98px) {
    .big-title {
        font-size: 1.9rem;
    }
}