.header a:link,
.header a:visited {
    color: #737373;
    text-decoration: none;
}

.header a:active,
.header a:hover {
    color: #8c8c8c;
}

@media all and (min-width: 1000px) {
    .header-nav {
        margin-left: auto !important;
        margin-right: auto !important;
        padding-left: 10px !important;
        padding-right: 10px !important;
        width: 980px !important;
    }
}

@media all and (min-width: 768px) {
    /*
     * for PC
     */
    .header {
        font-family: 'Helvetica', sans-serif;
        font-weight: 100;
        border-bottom: solid 1px #dbdbdb;
    }

    .header-nav-button {
        display: none;
    }

    .header {
        position: absolute;
        width: 100%;
        z-index: 2;
        background-color: rgba(255, 255, 255, 0.8);
    }

    .header-nav {
        overflow: hidden;
        padding-top: 0.5em;
        padding-left: 1%;
        padding-right: 1%;
        width: 98%;
    }

    .header-nav-icon {
        height: 50px;
        line-height: 50px;
        text-align: center;
    }

    .header-nav-icon img {
        vertical-align: middle;
        width: 100px;
    }

    .header-nav-menu {
        display: block !important;
    }

    .header-nav-items {
        display: table;
        width: 100%;
    }

    .header-nav-item {
        display: table-cell;
        text-align: center;
        margin-left: 0.8em;
        margin-right: 0.8em;
        font-size: 0.9em;
        height: 40px;
        line-height: 40px;
    }

    .header-nav-item a {
        vertical-align: middle;
    }

    .header-nav-item-fb img {
        width: 20px;
        margin: 0 1em;
        vertical-align: middle;
    }
}

@media all and (max-width: 767px) {
    /*
     * for SP
     */
    .header {
        font-family: 'Helvetica', sans-serif;
        font-weight: 100;
        position: absolute;
        width: 100%;
        height: 5em;
        z-index: 2;
    }

    .header-nav-arrow {
        width: 0;
        height: 0;
        border-left: 0.8em solid transparent;
        border-right: 0.8em solid transparent;
        border-bottom: 0.8em solid #ffffff;
        position: absolute;
        top: -0.75em;
        right: 0.8em;
    }

    .header-nav-icon {
        float: left;
        margin-left: 3%;
        line-height: 5em;
    }

    .header-nav-icon img {
        vertical-align: middle;
        width: 8em;
    }

    .header-nav-button {
        margin-right: 3%;
        float: right;
        line-height: 5em;
    }

    .header-nav-button img {
        vertical-align: middle;
        width: 3em;
    }

    .header-nav-menu {
        display: none;
        position: absolute;
        right: 1em;
        top: 4em;
        z-index: 10;
        background-color: #ffffff;
        -webkit-border-radius: 2px;
        -moz-border-radius: 2px;
        border-radius: 2px;
    }

    .header-nav-items {
        padding: 1.2em 2em 0.5em 1.5em;
    }

    .header-nav-item {
        font-size: 1em;
        line-height: 3em;
    }

    .header-nav-item-facebook img {
        width: 25px;
        vertical-align: middle;
    }

    .header-nav-item-fb img {
        padding-top: 0.4em;
        width: 1.5em;
        vertical-align: middle;
    }
}

ol, ul {
    list-style: none;
}