body,
div,
dl,
dt,
dd,
ul,
ol,
li,
h1,
h2,
h3,
h4,
h5,
h6,
pre,
form,
fieldset,
input,
textarea,
p,
blockquote,
th,
td {
    padding: 0;
    margin: 0;
    font: 12px 微软雅黑, 宋体, Tahoma, Geneva, sans-serif;
}

a {
    outline: none;
    text-decoration: none;
}

fieldset,
img {
    border: 0;
}

ol,
ul {
    list-style: none;
}

address,
caption,
cite,
code,
dfn,
em,
th,
var {
    font-weight: normal;
    font-style: normal;
}

caption,
th {
    text-align: left;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: normal;
    font-size: 100%;
}

q:before,
q:after {
    content: '';
}

abbr,
acronym {
    border: 0;
}

#header {
    height: 80px; /* PC 端高度不变 */
    width: 100%;
    background: #FFF;
    position: relative;
    z-index: 1;
}

.top_in {
    max-width: 1140px;
    height: 80px;
    margin: 0 auto;
    position: relative;
}

.logo {
    width: 355px;
    height: 40px;
    float: left;
    margin-top: 20px;
}

#header #nav {
    display: inline;
    float: left;
}

#header #nav li {
    display: block;
    float: left;
    height: 80px;
    position: relative;
}

#header ul li a {
    display: block;
    float: left;
    height: 80px;
    line-height: 80px;
    color: #333;
    font-size: 16px;
    padding: 0 20px;
    position: relative;
    border-left: 1px solid #EEE;
}

#header #nav li a:hover {
    color: #388ddf;
    text-decoration: none;
}

#header #nav li a.mutl {
    padding: 0 30px 0 20px;
}

#header #nav li a.last {
    border-right: 1px solid #EEE;
}

#header #nav li a i {
    position: absolute;
    right: 15px;
    top: 38px;
    width: 0;
    height: 0;
    font-size: 0;
    line-height: 0;
    border-width: 4px;
    border-style: solid;
    border-color: #333 #fff #fff;
    -moz-transition: -moz-transform .2s ease-in;
    -webkit-transition: -webkit-transform .2s ease-in;
    -o-transition: -o-transform .2s ease-in;
    transition: transform .2s ease-in;
    -moz-transform: rotate(0);
    -webkit-transform: rotate(0);
    -o-transform: rotate(0);
    transform: rotate(0);
}

#header #nav li a:hover i {
    -moz-transform: rotate(180deg);
    -moz-transform-origin: 50% 30%;
    -webkit-transform: rotate(180deg);
    -webkit-transform-origin: 50% 30%;
    -o-transform: rotate(180deg);
    -o-transform-origin: 50% 30%;
    transform: rotate(180deg);
    transform-origin: 50% 30%;
    filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=2);
}

#header #nav ul {
    position: absolute;
    display: none;
    top: 80px;
    left: 0;
    margin-left: 0;
    border: 1px solid #EEE;
}

#header #nav ul li {
    text-align: center;
    display: block;
    float: none;
    background: #FFF;
    height: 30px;
    float: left;
}

#header #nav ul li.nobg {
    background: none;
}

#header #nav ul li a {
    color: #555;
    font-size: 12px;
    width: 74px;
    height: 30px;
    line-height: 30px;
    display: block;
    text-align: left;
    border: none;
}

#header #nav ul li a:hover {
    text-decoration: none;
    color: #2871d5;
}

#header #navline {
    height: 3px;
    width: 74px;
    background: #2871d5;
    position: absolute;
    top: 0;
    left: 260px;
    z-index: 9;
}

#footer {
    height: 128px;
    width: 100%;
    background-color: #444546;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#footer img {
    margin: 0;
    padding: 0;
    display: block;
}

#footer p {
    text-align: center;
    margin: 0;
    color: #808181;
    font-size: 14px; /* 可根据需要调整字体大小 */
}

#footer a {
    color: #808181;
    font-size: 14px;
    padding: 0 0; /* 仅保留上下内边距，左右为0 */
    transition: color .3s;
    display: inline-block; /* 使padding对行内元素生效 */
}

#footer a:hover {
    color: #2980b9;
    text-decoration: none;
}

#footer a:focus {
    outline: 2px solid #e74c3c;
    outline-offset: 2px;
}

.container {
    max-width: 1140px;
}

/* 移动端样式（768px 以下，可根据实际设备调整断点） */
@media (max-width: 768px) {
    #header {
        height: auto; /* 移动端高度自适应 */
    }
    .top_in {
        height: auto;
        padding: 10px 0;
    }
    .logo {
        float: none; /* 取消浮动，居中显示 */
        text-align: center;
        margin: 0 auto 15px;
        width: auto; /* 宽度自适应 */
    }
    #header #nav {
        float: none;
        text-align: center;
        padding: 0;
    }
#header #nav li {
    float: left; 
    width: 50%; 
    box-sizing: border-box; 
    box-shadow: 0 0 0 0.5px #EEE; /* 用阴影模拟细边框 */
    text-align: center;
    height: auto; 
    padding: 0;
    position: relative; /* 需添加定位 */
}
#header #nav li::after { /* 伪元素模拟相邻边框（若有需要） */
    content: "";
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 0.5px;
    background: #EEE;
}
#header #nav li:last-child::after { /* 最后一个元素去掉右侧边框 */
    display: none;
}
    #header ul li a {
        float: none;
        display: block;
        height: auto;
        line-height: normal;
        font-size: 14px;
        padding: 12px;
        border: none;
        text-decoration: none;
    }
    #header #nav li a:hover {
        background: #f8f8f8; /* 悬停背景色 */
        color: #388ddf;
    }
    #header #nav li a i,
    #header #nav ul,
    #header #navline {
        display: none; /* 隐藏移动端无需元素 */
    }
}