section.outline .menu {
    display: flex;
    list-style: none;
    margin: 0 0 60px;
    padding: 0;
    justify-content: flex-start;
}
section.outline .menu.search {
    gap: 40px 24px;
}
section.outline .menu li {
    padding: 1em .5em;
    width: 49%;
    border: 1px solid #967d64;
    border-radius: 5px;
    border: 1px solid #967d64;
    border-radius: 5px;
    background-color: #ddd;
    background-image: repeating-linear-gradient(-45deg, #fff, #FFF 5px, transparent 0, transparent 6px);
    box-sizing: border-box;
}
section.outline .menu li a {
    color: #1e1e1e;
    text-decoration: none;
}
section.outline .menu li .sub {
    text-align: center;
    font-size: .89rem;
}
section.outline .menu li .main {
    text-align: center;
    font-size: 1.44rem;
}
section.outline .menu.useful {
    gap: 40px 2%;
    display: grid;
    grid-template-columns: 1fr 1fr;
}
section.outline .menu.useful li {
    width: auto;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}

@media screen and (max-width:600px){
section.outline .menu li {
    width: 100%;
    margin-bottom: 24px;
}
section.outline .menu.useful {
    gap: 14px 4%;
}
}