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

a {
    text-decoration: none;
}

body {
    font-family: sans-serif;
}

.hidden { display: none; }
.dim-layer { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; }
.dim-bg { display: none; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.8); filter: alpha(opacity=50); z-index:100; }
.dim-image { position: absolute; top:0; right:20px;}

#app {
    -webkit-font-smoothing: antialiased;
    color: #41403e;
}

#content-wrap {
    width: 100%;
}

.main-header {
    background-image: url('asset/img/img-bg.png');
    background-repeat: no-repeat;
    background-position: center;
    height: 900px;
    background-size: 1334px auto;
    background-color: #40afff;
}

.main-header .container {
    margin: 0 auto;
    padding-top: 88px;
    height: auto;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    align-items: center;
}

.img-todomath-logo {
    width: 412px;
    height: 319px;
}

.img-title-text {
    width: 300px;
    margin-top: 36px;
}

.img-title-text-m {
    display: none;
}

.img-subtitle-text {
    margin-top: 30px;
}

.img-subtitle-text-m {
    display: none;
}

.img-download-btn {
    margin-top: 50px;
}

.img-download-btn-m {
    display: none;
}

.todomath-com {
    width: 180px;
    margin-top: 24px;
}


.img-enuma-logo {
    margin-top: 90px;
}

.main-footer {
    background-image: url("asset/img/img-footer.png");
    background-repeat: no-repeat;
    background-position: center;
    height: 165px;
    background-size: 1600px auto;
}

@media screen and (max-width: 720px) {

.main-header {
    background-image: url('asset/img/img-bg-m.png');
    background-repeat: no-repeat;
    background-position: center;
    height: 1280px;
    background-size: 720px auto;
}

.main-header .container {
    padding-top: 115px;
    min-height: 100px;
}

.img-todomath-logo {
    width: 388px;
    height: 301px;
}

.img-title-text {
    margin-top: 58px;
}

.img-subtitle-text {
    display: none;
}

.img-subtitle-text-m {
    display: block;
    margin-top: 30px;
}

.img-download-btn {
    display: none;
}

.img-download-btn-m {
    display: block;
    margin-top: 102px;
}

.todomath-com {
    width: 262px;
    height: 41px;
    margin-top: 48px;
}

.img-enuma-logo {
    margin-top: 240px;
}

.main-footer {
    background-image: url("asset/img/img-footer-m.png");
    background-repeat: no-repeat;
    background-position: center;
    height: 321px;
    background-size: 720px auto;
}

}