* {
    padding: 0;
    margin: 0;
}

li {
    list-style: none;
}

.w1200 {
    width: 1200px;
    margin: 0 auto;
}

@media screen and (max-width: 1200px) {
    .w1200 {
        max-width: 100%;
        margin: 0 auto;
    }
}

@media screen and (max-width: 460px) {
    .w1200 {
        width: 100%;
    }
}

html {
    font-size: 16px;
}

@media screen and (max-width: 1200px) {
    html {
        font-size: 14px;
    }
}

@media screen and (max-width: 640px) {
    html {
        font-size: 12px;
    }
}

a {
    color: #666;
    text-decoration: none;
}

em,
i {
    font-style: normal;
}

.fl {
    float: left;
}

.fr {
    float: right;
}

.pr {
    position: relative;
}

.pa {
    position: absolute;
}

.clearfix::after {
    clear: both;
    content: " ";
    display: table;
}

body {
    overflow-x: hidden;
    width: 100%;
}

input::-webkit-input-placeholder {
    /* WebKit, Blink, Edge */
    color: #333333;
}

input:-moz-placeholder {
    /* Mozilla Firefox 4 to 18 */
    color: #333333;
}

input::-moz-placeholder {
    /* Mozilla Firefox 19+ */
    color: #333333;
}

input:-ms-input-placeholder {
    /* Internet Explorer 10-11 */
    color: #333333;
}

textarea::-webkit-input-placeholder {
    /* WebKit, Blink, Edge */
    color: #333333;
}

textarea:-moz-placeholder {
    /* Mozilla Firefox 4 to 18 */
    color: #333333;
}

textarea::-moz-placeholder {
    /* Mozilla Firefox 19+ */
    color: #333333;
}

textarea:-ms-input-placeholder {
    /* Internet Explorer 10-11 */
    color: #333;
}

b {
    font-weight: normal;
}

.pc_show {
    display: block;
}
.m_show{
    display: none;
}
@media screen and (max-width: 1240px) {
    .pc_show {
        display: none;
    }
}
.ipad_show{
    display: none;
}
@media screen and (max-width: 1240px){
    .ipad_show{
        display: block;
    }
}
@media screen and (max-width: 640px){
    .ipad_show{
        display: none;
    }
    .m_show{
        display: block;
    }
}