:root {
    --app-color-divider:rgba(60,60,67,.12);
}
body {
    --tw-bg-opacity: 1;
    background-color: rgba(var(--color-surface-light-rgb),var(--tw-bg-opacity));
}
#app {
    max-width: 768px;
    min-height: calc(100vh - 3rem); /* 100vh - 上下边距(1.5rem*2) */
    margin: 1.5rem auto;
    overflow: hidden;
}
#navigation {
    position: relative;
    /*border-right: 1px solid var(--color-gray-50);*/
}
#navigation::before{
    content: '';
    position: absolute;
    top: 0.75rem; 
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 50%;
}
#navigation::before {
    left: 0.75rem;
    background-color: var(--color-danger-400);
    box-shadow: 1.25rem 0 0 var(--color-warning-400),
                2.5rem 0 0 var(--color-success-400);
}