.head {
    width: 100%;
    height: 60px;
    position: fixed;
    top: 0;
    left: 0;
    background-color: var(--color-dark);
    box-shadow: 0 3px 3px rgba(0, 0, 0, 0.3);
    z-index: 0;
    color: var(--color-light)
}

.head .center {
    margin: 0 auto;
    max-width: 1280px;
    height: 100%;
    display: flex;
    justify-content: space-between;
}

.head .center .left {
    min-width: 180px;
    height: 100%;
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: 800;
}

.head .center .left .logo {
    width: 38px;
    height: 38px;
}

.head .center .left .sys-title {
    margin-left: 5px;
}

.head .center .right {
    height: 100%;
    display: flex;
    justify-content: right;
}

.head .center .head-item {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 15px;
    font-size: var(--font-size-head);
    cursor: pointer;
    position: relative;
}