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


:root {
    --design-1rem: 75;
}

html,
body {
    width: 100%;
    height: 100%;
    font-family: Helvetica, Charter, PingFang SC, Microsoft YaHei, Arial, sans-serif;
}
.flex-row-center-center {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}

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

.flex-column-start-center {
    display: flex;
    flex-direction: column;
    justify-content: start;
    align-items: center;
}

.flex-column-start-start {
    display: flex;
    flex-direction: column;
    justify-content: start;
    align-items: start;
}

.flex-row-start-start {
    display: flex;
    flex-direction: row;
    justify-content: start;
    align-items: start;
}
.container {
    position: relative;
}

body {
    position: relative;
}

img {
    width: 100%;
}