/* css  reset */

*,
*::after,
*::before {
    box-sizing: border-box;
}

body,
html {
    color: #2c3a46;
    margin: 0;
    font-size: 14px;
    line-height: 1.6em;
    font-family: PingFangSC-light, "Source Sans Pro", "Helvetica Neue", Arial, "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
}

html,
body,
p,
header,
footer,
div,
ul,
ol,
dl,
dd,
h3,
h4,
h5 {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    font: inherit;
    font-size: 14px;
    vertical-align: baseline;
    background: transparent;
}

ul,
ol {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
    outline: 0;
}

img {
    border: none;
    width: 100%;
    pointer-events: none;
}

.fa {
    display: inline-block;
    font: normal normal normal 14px/1 FontAwesome;
    font-size: 14px;
    font-size: inherit;
    text-rendering: auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}


/* header */

.header {
    width: 100%;
    height: 60px;
    background: transparent;
    position: fixed;
    top: 0;
    z-index: 200;
}

.header_1,
.header.immer {
    background: #fff;
    border-bottom: 1px solid #eeeeee;
}

.header:hover {
    background: rgba(0, 0, 0, .3);
}

.header_1:hover,
.header.immer:hover {
    background: #fff;
}

.header-box {
    width: 1200px;
    height: 60px;
    margin: 0 auto;
    position: relative;
}

.header-logo {
    display: inline-block;
    margin-top: 10px;
    height: 40px;
    position: absolute;
    left: 0;
    cursor: pointer;
}

.header_1 .header-logo,
.header.immer .header-logo {
    display: none;
}

.header-logo_1 {
    display: inline-block;
    margin-top: 10px;
    height: 40px;
    position: absolute;
    left: 0;
    cursor: pointer;
    display: none;
}

.header_1 .header-box .header-logo_1,
.header.immer .header-box .header-logo_1 {
    display: inline-block;
}

.header-logo img,
.header-logo_1 img {
    height: 40px;
    width: auto;
}

.header-nav {
    float: right;
}

.header-list {
    float: right;
    position: relative;
}

.header-list>li {
    width: 150px;
    float: left;
    line-height: 60px;
    cursor: pointer;
    font-size: 16px;
    color: #fff;
    position: relative;
    text-align: center;
}

.header_1 .header-list>li,
.header.immer .header-list>li {
    width: 150px;
    float: left;
    line-height: 60px;
    cursor: pointer;
    font-size: 16px;
    color: #000;
    position: relative;
    text-align: center;
}

.header-list>li>a {
    padding: 5px 20px 5px 20px;
}

.header-list>li:after {
    content: ' ';
    display: none;
    background-color: #000;
    width: 20%;
    height: 2px;
    border-radius: 4px;
    position: absolute;
    left: 50%;
    margin-left: -10%;
    bottom: 4px;
}

header .header-list .ox::before {
    content: ' ';
    background-color: #fff;
    width: 20%;
    height: 2px;
    border-radius: 4px;
    position: absolute;
    left: 50%;
    margin-left: -10%;
    bottom: 4px;
}

.header_1 .header-list .ox::before,
.header.immer .header-list .ox::before {
    content: ' ';
    background-color: #000;
    width: 20%;
    height: 2px;
    border-radius: 4px;
    position: absolute;
    left: 50%;
    margin-left: -10%;
    bottom: 4px;
}

.header_1 .header-list>li:after,
.header.immer .header-list>li:after {
    content: ' ';
    display: none;
    background-color: #1a7be9;
    width: 20%;
    height: 2px;
    border-radius: 4px;
    position: absolute;
    left: 50%;
    margin-left: -10%;
    bottom: 4px;
}

.header-list>li:hover::after {
    display: block;
    background-color: #fff;
}

.header_1 .header-list>li:hover,
.header.immer .header-list>li:hover {
    color: #1a7be9;
}

.header_1 .header-list>li:hover::after,
.header.immer .header-list>li:hover::after {
    display: block;
    transition: 1s;
    background-color: #1a7be9;
}


/* footer */

.footer {
    width: 100%;
    height: 150px;
    position: relative;
    background: #323232;
    color: #fff;
    top: 60px;
    text-align: center;
}

.footer .footer-box {
    width: 1200px;
    position: relative;
    margin: 0 auto;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-box p:nth-child(1) {
    padding: 25px;
    opacity: .6;
    letter-spacing: 2px;
}

.footer-box p:nth-child(1) span {
    margin: 0 20px;
    cursor: pointer;
}

.footer-box p:nth-child(2) {
    padding: 0 0 20px 0;
    opacity: .6;
    letter-spacing: 1px;
    font-size: 12px;
}

.footer-box p:nth-child(2) .sp {
    margin: 0 40px;
}

.footer-aderss {
    width: 1200px;
    position: relative;
    margin: 0 auto;
}

.footer-aderss p {
    font-size: 12px;
    line-height: 40px;
    opacity: .6;
    letter-spacing: .5px;
}

.cnzz img {
    width: auto;
    vertical-align: middle;
}


/* 圆点装饰 */

.dot {
    display: block;
    width: 15px;
    height: 15px;
    border: 1px solid #1a7be9;
    border-radius: 50%;
    position: relative;
    margin: 5px auto;
}

.dot::before,
.dot::after {
    content: ' ';
    background-color: #1a7be9;
    width: 200px;
    height: 1px;
    position: absolute;
    top: 50%;
    margin-top: -0.5px;
}

.dot::before {
    right: 20px;
}

.dot::after {
    left: 20px;
}

.dot span {
    display: block;
    width: 5px;
    height: 5px;
    background: #1a7be9;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    margin-left: -2.5px;
    top: 50%;
    margin-top: -2.5px;
}


/* 侧边返回按钮 */

.return-btn {
    width: 70px;
    height: 200px;
    position: fixed;
    right: 0;
    top: 50%;
    margin-top: -100px;
    z-index: 100;
}

.return-top {
    width: 50px;
    height: 120px;
    background: #fff;
    margin: 10px auto;
    text-align: center;
    font-size: 18px;
    padding-top: 10px;
    cursor: pointer;
    border-radius: 7px;
    border: 1px solid #e3e2e5;
    color: #9797a1;
    box-shadow: 0 0 10px rgba(0, 0, 0, .2);
}

.return-top i {
    display: block;
    font-size: 18px;
    text-align: center;
    margin-top: 6px;
}

.erweima {
    width: 120px;
    height: 120px;
    position: relative;
    margin-left: -130px;
    top: -110px;
    z-index: 100;
    display: none;
    box-shadow: 0 0 10px rgba(0, 0, 0, .2);
}

.erweima img {
    width: 120px;
    height: 120px;
    position: absolute;
    left: 0;
}

.return-bottom {
    width: 50px;
    height: 50px;
    background: #fff;
    margin: 10px auto;
    cursor: pointer;
    border: 1px solid #e3e2e5;
    border-radius: 7px;
    box-shadow: 0 0 10px rgba(0, 0, 0, .2);
    display: none;
}

.return-bottom i {
    display: block;
    font-size: 22px;
    text-align: center;
    line-height: 50px;
    color: #e3e2e5;
}

.return-top:hover,
.return-bottom:hover {
    background: #1a7be9;
    border: #1a7be9;
    color: #fff;
}

.return-top:hover>.erweima {
    display: block;
}




/* 公用----------------------------start-------------------------------------- */
/* 文字居中 */
.ta {
    text-align: center;
}

/* 字体超出隐藏 */
.ov {
    overflow: hidden;
}

/* 弹性盒 */
.f {
    display: flex;
}

.fc {
    justify-content: space-between;
}

/* 鼠标小手指 */
.cp {
    cursor: pointer;
}

/* 内框------------------------------start----------------------------------- */
.inner-frame {
    width: 1200px;
    margin: 0 auto;
}

.inner-frame img {
    display: block;
}

/* 内框--------------------------------end--------------------------------- */

/* 公用----------------------------end------------------------------- */