/* --- 全局設置 --- */
* {
    box-sizing: border-box;
}

body {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    padding: 20px;
    margin: 0;
    color: #444;
    line-height: 1.6;
    background-color: #faf9f8;
}

@media (max-width: 600px) {
    body {
        padding: 15px;
    }
}