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.backnav{ height: .88rem; background: #fff; line-height: .88rem; text-align: center; position: relative}
.backnav .area{ margin-top: 0px;}
.backnav .back{ width: .2rem; height: .2rem; border-left : .03rem solid #000; border-bottom: .03rem #000 solid;    transform: rotate(
        45deg
);
    -webkit-transform: rotate(
            45deg
    ); position: absolute; left: .2rem; top: .34rem;}