/* reset */
html,body,h1,h2,h3,h4,h5,h6,div,dl,dt,dd,ul,ol,li,p,blockquote,pre,hr,figure,table,caption,th,td,form,fieldset,legend,input,button,textarea,menu{margin:0;padding:0;}
html,body,fieldset,img,iframe,abbr,input{border:0;}
a,button{cursor:pointer;}
del,ins,u,s,a,a:hover{text-decoration:none;}
body {background:#fff;color:#333;font-size:14px;font-family:"Microsoft YaHei";}
ul, ol, li {list-style: none; }
a{text-decoration:none; color:#444;-moz-transition: all 0.5s;-webkit-transition:all 0.5s;-o-transition:all 0.5s;transition:all 0.5s;}
img {max-width:100%;height:auto;}

/* 响应式基础设置 */
* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    overflow-x: hidden;
    min-width: 320px;
    line-height: 1.5;
}

/*common*/
/* ===== 容器系统 ===== */
.container, .w_1200 {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 全宽容器变体 */
.container-full {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    padding: 0 15px;
}

/* ===== 现代布局方案 ===== */
/* Flexbox 工具类 (推荐替代float) */
.flex {
    display: flex;
}
.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}
.flex-column {
    display: flex;
    flex-direction: column;
}

/* Grid 布局工具类 */
.grid {
    display: grid;
}
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

/* ===== 传统浮动布局 (保持兼容) ===== */
.fr { float: right; }
.fl { float: left; }
.clear { clear: both; }

/* 增强版清除浮动 */
.clearfix::after {
    content: "";
    display: table;
    clear: both;
}

/* ===== 显示与隐藏 ===== */
.dn { display: none; }
.db { display: block; }
.dib { display: inline-block; }

/* 移动端友好的显示隐藏 */
.show-mobile { display: block; }
.hide-mobile { display: none; }

/* ===== 文本对齐 ===== */
.tc { text-align: center; }
.tl { text-align: left; }
.tr { text-align: right; }

/* ===== 间距工具类 ===== */
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.pt-20 { padding-top: 20px; }
.pb-20 { padding-bottom: 20px; }

/* ===== 移动端响应式 ===== */
@media (max-width: 768px) {
    .container {
        width: 95%;
        padding: 0 10px;
    }
    
    /* 移动端显示控制 */
    .show-mobile { display: block !important; }
    .hide-mobile { display: none !important; }
    .show-desktop { display: none !important; }
    
    /* 移动端浮动清除 */
    .fl-mobile { float: none; width: 100%; }
    .fr-mobile { float: none; width: 100%; }
}

/* 头部响应式 */
.header{overflow-x: hidden;}
.header_top{height: auto;min-height: 152px;padding:15px 0;}
.logo {float: left; margin: 19px 0; max-width: 50%; }
.logo img {max-width: 100%;height: auto;}
.tel_index {float: right; color: #000; margin: 40px 0; font-size: 14px; line-height: 1.4; background: url(../image/tel.jpg) left center no-repeat; padding-left: 40px; min-height: 60px; font-weight:bold;}
.tel_index p {font-size: 24px; color: #167ADA; line-height: 1.2; font-family: "Impact"; }

.header_center{border-top: 1px solid #e5e5e5;position:relative;}

/* 导航响应式 */
.nav{height:auto;min-height:70px;line-height:70px;position:relative;z-index:1;width:100%;float:none;}
.nav a{ color:#000; }
.nav .nLi{ float:none; display:inline-block; position:relative; background:none; }
.nav .nLi.on{background:none;}
.nav .nLi h3{ float:none; display:inline-block; }
.nav .nLi h3 a{ display:block; font-size:16px; font-weight:normal; padding:0 20px;text-align: center;white-space: nowrap;}
.nav .sub{ display:none; width:200px; left:0; top:100%; position:absolute; background:#fff; line-height:48px;border-top: 3px solid #4b9be2;text-indent:35px;z-index:1000;}
.nav .sub li{ zoom:1; }
.nav .sub a{ display:block; padding:0 10px;font-size: 16px;color: #7d8081; }
.nav .sub a:hover{color: #397fbd; }
.nav .on h3 a{color: #397fbd;}

/* 移动端汉堡菜单 */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: #000;
    cursor: pointer;
    padding: 10px;
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
}

/* 搜索框响应式 */
.search {width: 100%; max-width: 245px; height: auto; margin: 18px 0; padding: 0px; float: right; overflow: hidden; }
.search .keywords {background: url(../image/s_inp.jpg) no-repeat; width: 70%; max-width: 201px; height: 32px; float: left; padding: 0; margin: 0; font-size: 14px;}
.search .button {cursor: pointer; margin: 0px; width: 30%; max-width: 44px; height: 32px; background: url(../image/s_so.jpg) no-repeat right center; float: left; border:none;}
.search input {text-align: left; line-height: 30px; margin: 0; padding: 0; height: 30px; color: #b9b9b9; font-size: 12px; border: medium none; text-indent: 1em; width:100%;}
.search input:focus,
.search textarea:focus {border-color: #fff; outline: none; }
.search input:hover,
.search textarea:hover {border-color: #fff; outline: none; }

/* 轮播图响应式 */
.slideBox{ width:100%; height:auto; min-height:300px; overflow:hidden; position:relative;}
.slideBox .hd{ height:15px; overflow:hidden; position:absolute; bottom:15px; z-index:1;width: 100%; }
.slideBox .hd ul{ overflow:hidden; zoom:1; width: 100%; text-align: center; }
.slideBox .hd ul li{ display: inline-block;margin-right:4px; width:15px; height:15px; background:#fff; cursor:pointer;text-indent: -99999px;border-radius: 7.5px; 
  -webkit-transition: all .3s linear;
    -moz-transition: all .3s linear;
    -o-transition: all .3s linear;
    transition: all .3s linear;}
.slideBox .hd ul li.on{ background:#189ACC; color:#fff;width: 40px; }
.slideBox .bd{ position:relative; height:100%; z-index:0; }
.slideBox .bd li{ zoom:1; vertical-align:middle; width:100%;}
.slideBox .bd li div {
    background-size: cover;
    background-position: center;
    height: 50vh;
    min-height: 300px;
    width: 100%;
}

/* 产品相关样式响应式 */
.proname { text-align: center; color: #555555; font-size: clamp(20px, 5vw, 30px); line-height: 1.2; font-weight: normal; }
.prona {text-align: center; font-size: 14px; line-height: 1.4; color: #555; text-transform:uppercase;}
.pron{text-align: center;font-size: 14px;color: #555;line-height: 1.4;}
.pro-class {margin: 0 auto; text-align: center; font-size: 14px; color: #343434; display: flex; flex-wrap: wrap; justify-content: center;}
.pro-class a {display: inline-block; padding: 15px 10px; color: #343434; }
.pro-class a:hover{color: #4b9be2;}
.pro-class span {display: inline-block; padding: 15px 10px; font-weight: bold; }

/* 主要内容区域响应式 */
.main1{padding: 30px 0;height: auto;border-bottom: 1px solid #666;}
.main1 .m1_box{float: none; width: 100%; max-width: 287px; margin: 0 auto 30px; display: inline-block; vertical-align: top;}
.main1 .m1_box a.a1 {display: block; width: 100%; height: auto; position: relative; }
.main1 .m1_box a.a1 img {width: 100%;height: auto;}
.main1 .m1_box a.a1 span {position: absolute; width: 100%; height: 100%; left: 0; top: 0; background: url(../image/big.png) center center no-repeat; background-color: rgba(0,0,0,0.5); display: none; }
.main1 .m1_box a.a1 span label {display: block; text-align: center; color: #fff; padding: 50% 10px 0; }
.main1 .m1_box a:hover span{ display:block;}
.main1 .m1_box .title{padding-top: 10px;border-bottom: 1px solid #e5e5e5;width: 100%;position: relative;}
.main1 .m1_box .title span a{font-size: 18px;color: #000;line-height: 1.2;}
.main1 .m1_box .title p{color: #9d9d9d;font-size: 14px;line-height: 1.4;margin: 5px 0;}
.main1 .m1_box .title a.more{font-size: 20px;position: absolute;right: 0;top: 10px;}
.main1 .m1_box .title:hover a.more{color: #4b9be2;}
.main1 .m1_box .title:hover{border-bottom: 1px solid #4b9be2;}
.main1 .m1_box .title:hover span a{color: #4b9be2;}
.main1 .amore{display: block;margin: 20px auto;width: 150px;height: 44px;line-height: 44px;font-size: 16px;color: #fff;text-align: center;background-color: #666666;}
.main1 .amore:hover{background-color:#4b9be2; }

.main2{padding: 30px 0;}
.main2 .about{background-color: #eff3f7;height: auto;padding: 20px 0;margin-top: 5px;}
.main2 .m2_3ad{width: 100%; max-width: 1050px; height: auto; background-color: #fff; margin: 0 auto;}
.main2 .m2_3ad_box{width: 100%; max-width: 225px; height: auto; border: 1px solid #bfbfbf; margin: 20px auto; padding: 40px 10px 20px; position: relative; display: inline-block;}
.main2 .m2_3ad_box p{text-align: center;font-size: 14px;line-height: 1.4;color: #474747;}
.main2 .m2_3ad_box h2{position: absolute;font-size: 20px;line-height: 1;height: auto;width: 140px;background-color: #fff;left: 50%;margin-left: -70px;top: -13px;text-align: center;}
.main2 .m2_about{margin-top: 30px;}
.main2 .m2_left{float: none; width: 100%; max-width: 660px; margin: 0 auto;}
.main2 .m2_left .qx{margin-top: 20px;width: 100%;font-size: 14px;line-height: 1.6;text-align: center;color: #474747;height: auto;}
.main2 .m2_left .more{display: block;width: 140px;height: 35px;line-height: 35px;text-align: center;font-size: 14px;border: 1px solid #555;color: #555;margin: 20px auto;}
.main2 .m2_left .more:hover{color:#4b9be2;border: 1px solid #4b9be2;}
.main2 .m2_right{float: none; width: 100%; max-width: 540px; margin: 20px auto;}

.main3{height: auto;padding: 30px 0;}
.main3 .protopul{ float:none; width:100%; display: flex; flex-wrap: wrap; justify-content: center; }
.main3 .protopul li{ float:none; width:100%; max-width: 298px; height:auto; margin:15px; display:inline-block; position:relative; overflow:hidden;}
.main3 .protopul li  p.wor{ float:none; width:100%; font-size:14px; padding:15px 0; color:#404040; text-align:center; }
.main3 .protopul li  p.wor font{ display:block; font-size:24px; font-family:Arial, Helvetica, sans-serif;color: #474747;}
.main3 .protopul li  p.wor span{ display:block; font-size: 20px;color: #474747;}
.main3 .protopul li .divwor{ position:absolute; left:0; bottom:0; margin-bottom:-100%; width:100%; background:#337bbb; height:100%; font-size:14px; padding:20px 10px;}
.main3 .protopul li  .divwor font{ display:block; text-align:center; font-size:24px; font-family:Arial, Helvetica, sans-serif; color:#fff; padding:10px 0;}
.main3 .protopul li  .divwor span{ display:block; text-align:center;color:#fff; padding:0 0 10px 0;font-size: 20px;}
.main3 .protopul li  .divwor p{ display:block;line-height:1.4; height:auto; overflow:hidden; padding:0 10px;color:#fff;font-size: 14px;}
.main3 .protopul  li a img{ width:100%; height:auto;}

/* 页脚响应式 */
.footer{ color: #FFFFFF ; text-align:center; height:auto; min-height:50px; line-height:1.4; padding:15px; background:#fff; font-size:14px;}
.footer a{ color:#666;}
.footer a:hover{ color:#fff;}

/* 内页内容响应式 */
.contentny {
    width: 100%;
    max-width: 1200px;
    min-height: 500px;
    margin: 17px auto;
    padding: 0 15px;
}
.leftcc {
    width: 100%;
    float: none;
    margin-bottom: 20px;
}
.leftcc_top {
    width: 100%;
    height: auto;
    min-height: 40px;
    background: #2C3135;
    line-height: 40px;
}
.leftcc_top h2{font-weight: normal;color: #fff;padding: 10px 40px;font-size: 16px;background:url(../image/top_nav_bg.jpg) 16px center no-repeat;}
.leftcc_bt {
    padding: 10px;
    background: #fff;
    border: 1px #dbdbdb solid;
}

.xianright {
    width: 100%;
    float: none;
    border: 1px #dadada solid;
    border-top: 3px #2C3135 solid;
}

.mainCon{width:100%; float:none;}

/* 移动端优化 */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    
    .header_top {
        text-align: center;
        padding: 10px 0;
    }
    
    .logo {
        float: none;
        margin: 10px auto;
        max-width: 80%;
        display: block;
    }
    
    .tel_index {
        float: none;
        margin: 10px auto;
        text-align: center;
        background-position: center top;
        padding-left: 0;
        padding-top: 40px;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav {
        display: none;
        height: auto;
        line-height: normal;
    }
    
    .nav.active {
        display: block;
    }
    
    .nav .nLi {
        display: block;
        width: 100%;
        border-bottom: 1px solid #e5e5e5;
    }
    
    .nav .nLi h3 a {
        width: 100%;
        padding: 15px;
        text-align: left;
    }
    
    .nav .sub {
        position: static;
        width: 100%;
        display: none;
    }
    
    .nav .nLi.active .sub {
        display: block;
    }
    
    .search {
        float: none;
        margin: 10px auto;
        max-width: 100%;
    }
    
    .slideBox .bd li div {
        height: 40vh;
        min-height: 250px;
    }
    
    .main1 .m1_box {
        margin: 0 auto 20px;
    }
    
    .main2 .m2_3ad_box {
        margin: 10px auto;
    }
    
    .main3 .protopul li {
        margin: 10px 0;
    }
    
    .contentny {
        padding: 0 10px;
    }
    
    .leftcc, .xianright {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .tel_index p {
        font-size: 20px;
    }
    
    .proname {
        font-size: 18px;
    }
    
    .main1 .m1_box .title span a {
        font-size: 16px;
    }
    
    .main3 .protopul li p.wor font {
        font-size: 20px;
    }
    
    .main3 .protopul li p.wor span {
        font-size: 16px;
    }
}

/* 平板设备优化 */
@media (min-width: 769px) and (max-width: 1024px) {
    .nav .nLi h3 a {
        padding: 0 15px;
        font-size: 14px;
    }
    
    .main1 .m1_box {
        width: 48%;
        margin: 1%;
    }
    
    .main3 .protopul li {
        width: 45%;
        margin: 2.5%;
    }
}

/* 桌面设备优化 */
@media (min-width: 1025px) {
    .nav {
        display: flex !important;
    }
    
    .main1 .m1_box {
        width: 23%;
        margin: 1%;
    }
    
    .main3 .protopul li {
        width: 30%;
        margin: 1.5%;
    }
}

/* 确保所有链接在移动端有足够的点击区域 */
a, button {
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* 修复表单元素在iOS上的显示 */
input, textarea, select {
    font-size: 16px;
}

/* 防止文本溢出 */
p, h1, h2, h3, h4, h5, h6 {
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* 图片响应式 */
img {
    max-width: 100%;
    height: auto;
}

/* 表格响应式 */
table {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    display: block;
}

/* 确保内容不会超出屏幕 */
.container, .w_1200 {
    overflow-x: hidden;
}

/* 其他原有样式保持，但添加响应式支持 */


/* ===== 重置和基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #023793;
    --primary-dark: #022a70;
    --primary-light: #1e4fa0;
    --secondary-color: #dc3545;
    --text-dark: #333333;
    --text-light: #666666;
    --text-lighter: #999999;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-lighter: #f5f5f5;
    --border-color: #e5e5e5;
    --border-light: #f0f0f0;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-lg: 0 5px 20px rgba(0,0,0,0.15);
    --radius: 6px;
    --transition: all 0.3s ease;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 顶部栏样式 ===== */
.top-bar {
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-light);
    padding: 8px 0;
    font-size: 12px;
    color: var(--text-light);
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

.top-bar a:hover {
    color: var(--primary-color);
}

.divider {
    margin: 0 12px;
    color: var(--text-lighter);
}

/* ===== 主头部样式 ===== */
.main-header {
    background: var(--bg-white);
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    gap: 10px;
}

/* Logo 区域 */
.logo-area {
    flex-shrink: 0;
    flex-grow: 1;
    display: flex;
    justify-content: left;
    margin-left: 0px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-dark);
    justify-content: left;
}

.logo img {
    height: 80px;
    width: auto;
    margin-right: 0px;
}

/* 联系信息 */
.contact-info {
    display: flex;
    gap: 30px;
    flex-shrink: 0;
    width: auto;
    margin-left: auto;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    white-space: nowrap;
}

.contact-item .icon {
    font-size: 20px;
    width: 36px;
    height: 36px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.contact-text span {
    font-size: 12px;
    color: var(--text-light);
    line-height: 1.2;
}

.contact-text strong {
    font-size: 16px;
    color: var(--primary-color);
    font-weight: bold;
    line-height: 1.2;
}

/* 移动端菜单按钮 - 关键修改 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    position: relative;
    z-index: 1002;
    margin-left: 15px;
}

.mobile-menu-toggle span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--primary-color);
    border-radius: 2px;
    transition: var(--transition);
    transform-origin: center;
}

/* 头部样式*/
 :root {
            --primary-color: #1e4a7b;
            --primary-dark: #15375c;
            --bg-white: #ffffff;
            --bg-light: #f8f9fa;
            --bg-lighter: #f1f3f5;
            --text-dark: #333333;
            --text-light: #666666;
            --text-lighter: #999999;
            --border-light: #e9ecef;
            --border-color: #dee2e6;
            --shadow: 0 2px 10px rgba(0,0,0,0.1);
            --shadow-lg: 0 5px 15px rgba(0,0,0,0.1);
            --radius: 4px;
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: "Microsoft YaHei", Arial, sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }

        /* ===== 主头部样式 ===== */
        .main-header {
            background: var(--bg-white);
            box-shadow: var(--shadow);
            position: relative;
            z-index: 1001;
        }

        .main-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 15px;
        }

        /* Logo 区域 */
        .logo-area {
            flex-shrink: 0;
        }

        .logo img {
            height: 60px;
            width: auto;
        }

        /* 联系信息 */
        .contact-info {
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .contact-item .icon {
            font-size: 24px;
        }

        .contact-text span {
            display: block;
            font-size: 14px;
            color: var(--text-light);
        }

        .contact-text strong {
            display: block;
            font-size: 18px;
            color: var(--primary-color);
            line-height: 1.3;
        }

        /* ===== 移动端菜单按钮 ===== */
        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: space-between;
            width: 30px;
            height: 22px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 0;
            position: relative;
            z-index: 1002;
        }

        .mobile-menu-toggle span {
            display: block;
            height: 4px;
            width: 100%;
            background: var(--primary-color);
            border-radius: 4px;
            transition: var(--transition);
            transform-origin: left;
        }

        /* 菜单按钮激活状态 */
        .mobile-menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }

        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .mobile-menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }

        /* ===== 主导航样式 ===== */
        .main-navigation {
            background: var(--primary-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }

        .main-navigation .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: relative;
            padding: 0;
        }

        /* 导航菜单 */
        .nav-menu {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            flex: 1;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 8px;

            padding: 18px 24px;
            color: white;
            text-decoration: none;
            font-size: 16px;
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-link:hover,
        .nav-item.active .nav-link {
            background: var(--primary-dark);
            color: white;
        }

        /* 下拉菜单 */
        .has-dropdown .nav-link {
            padding-right: 40px;
        }

        .dropdown-arrow {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            width: 0;
            height: 0;
            border-left: 4px solid transparent;
            border-right: 4px solid transparent;
            border-top: 4px solid currentColor;
            transition: var(--transition);
        }

        .dropdown-menu {
            position: absolute;
            top: 100%;
            left: 0;
            min-width: 200px;
            background: var(--bg-white);
            box-shadow: var(--shadow-lg);
            border-radius: 0 0 var(--radius) var(--radius);
            list-style: none;
            margin: 0;
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px);
            transition: var(--transition);
            z-index: 1001;
        }

        .has-dropdown:hover .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .has-dropdown:hover .dropdown-arrow {
            transform: translateY(-50%) rotate(180deg);
        }

        .dropdown-menu a {
            display: block;
            padding: 12px 20px;
            color: var(--text-dark);
            text-decoration: none;
            font-size: 14px;
            transition: var(--transition);
            border-left: 3px solid transparent;
        }

        .dropdown-menu a:hover {
            background: var(--bg-light);
            color: var(--primary-color);
            border-left-color: var(--primary-color);
        }

        /* 搜索框 */
        .nav-search {
            margin-left: 30px;
        }

        .search-form {
            position: relative;
        }

        .search-box {
            display: flex;
            background: white;
            border-radius: 25px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }

        .search-input {
            flex: 1;
            border: none;
            padding: 12px 20px;
            font-size: 14px;
            outline: none;
            background: transparent;
            min-width: 200px;
        }

        .search-input::placeholder {
            color: var(--text-lighter);
        }

        .search-btn {
            background: var(--primary-color);
            border: none;
            padding: 12px 20px;
            color: white;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .search-btn:hover {
            background: var(--primary-dark);
        }

        /* ===== 移动端遮罩层 ===== */
        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 998;
            opacity: 0;
            transition: var(--transition);
        }

        .mobile-overlay.active {
            display: block;
            opacity: 1;
        }

        /* ===== 移动端样式 ===== */
        @media (max-width: 768px) {
            .main-header {
                padding: 12px 0;
            }
            
            .main-header .container {
                gap: 0;
                justify-content: space-between;

                align-items: center;
            }
            
            /* 移动端Logo和菜单按钮并排 */
            .logo-area {
                margin-left: 0;
                justify-content: flex-start;
                flex-grow: 0;
                flex-shrink: 0;
            }
            
            .logo img {
                height: 50px;
            }
            
            .contact-info {
                display: none;
            }
            
            /* 移动端菜单按钮 */
            .mobile-menu-toggle {
                display: flex;
                margin-left: 0;
                order: 2;
            }
            
            .logo-area {
                order: 1;
            }
            
            /* 移动端导航样式 */
            .main-navigation {
                position: fixed;
                top: 0;
                left: -100%;
                width: 280px;
                height: 100vh;
                background: var(--bg-white);
                transition: var(--transition);
                z-index: 999;
                overflow-y: auto;
                box-shadow: var(--shadow-lg);
            }
            
            .main-navigation.active {
                left: 0;
            }
            
            .main-navigation .container {
                flex-direction: column;
                align-items: stretch;
                padding: 0;
                height: 100%;
            }
            
            /* 移动端导航菜单 */
            .nav-menu {
                flex-direction: column;
                flex: 1;
                padding: 70px 0 20px 0;
            }
            
            .nav-item {
                border-bottom: 1px solid var(--border-light);
                position: relative;
            }
            
            .nav-item:last-child {
                border-bottom: none;
            }
            
            .nav-link {
                color: var(--text-dark);
                padding: 16px 20px;
                justify-content: space-between;
                font-size: 16px;
                background: var(--bg-white);
                transition: var(--transition);
            }
            
            .nav-link:hover,
            .nav-item.active .nav-link {
                background: var(--bg-light);
                color: var(--primary-color);
            }
            
            .has-dropdown .nav-link {
                padding-right: 20px;
            }
            
            .dropdown-arrow {
                position: static;
                transform: none;
                border-top-color: var(--text-light);
                transition: transform 0.3s ease;
            }
            
            /* 移动端下拉菜单 */
            .dropdown-menu {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                box-shadow: none;
                background: var(--bg-lighter);
                border-radius: 0;
                display: none;
                padding: 0;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.3s ease;
            }
            
            /* 激活状态的下拉菜单 */
            .nav-item.active .dropdown-menu {
                display: block;
                max-height: 500px;
            }
            
            .nav-item.active .dropdown-arrow {
                transform: rotate(180deg);
            }
            
            .dropdown-menu a {
                padding: 14px 20px 14px 40px;
                border-left: none;
                border-bottom: 1px solid var(--border-color);
                font-size: 15px;
                background: var(--bg-lighter);
                transition: var(--transition);
            }
            
            .dropdown-menu a:hover {
                background: var(--bg-light);
                color: var(--primary-color);
            }
            
            .dropdown-menu a:last-child {
                border-bottom: none;
            }
            
            /* 搜索框移动端 */
            .nav-search {
                margin: 0;
                padding: 20px;
                border-top: 1px solid var(--border-light);
                background: var(--bg-lighter);
                order: 3;
            }
            
            .search-box {
                border-radius: 8px;
            }
            
            .search-input {
                min-width: auto;
                padding: 12px 15px;
                font-size: 16px;
            }
            
            .search-btn {
                padding: 12px 15px;
            }
        }

        /* 小屏幕手机优化 */
        @media (max-width: 480px) {
            .logo img {
                height: 45px;
            }
            
            .main-navigation {
                width: 100%;
                left: -100%;
            }
            
            .nav-link {
                padding: 14px 15px;
                font-size: 15px;
            }
            
            .dropdown-menu a {
                padding: 12px 15px 12px 35px;
                font-size: 14px;
            }
            
            .mobile-menu-toggle {
                width: 22px;
                height: 16px;
            }
        }

        /* 平板设备 */
        @media (min-width: 769px) and (max-width: 1024px) {
            .main-header .container {
                gap: 15px;
            }
            
            .logo img {
                height: 70px;
            }
            
            .contact-info {
                gap: 20px;
            }
            
            .contact-text strong {
                font-size: 15px;
            }
        }

        /* 大屏幕桌面优化 */
        @media (min-width: 1400px) {
            .logo-area {
                margin-left: 150px;
            }
        }