.main-area {
    padding-top: 10px;
}

.site-header {
    background: linear-gradient(
        to bottom,
        rgba(255, 110, 199, .28),   /* 糖果粉 */
        rgba(34, 211, 238, .18),    /* 天青 */
        rgba(0, 0, 0, 0)
    );
}