* {
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 16px;
}
html{
    background-image: url('../images/bg.jpg');
    background-size: cover;
}

h2 {
    color: #326663;
    border-bottom: 5px solid #326663;
    margin-bottom: 30px;
    padding-bottom: 10px;
    font-size: 25px;
}

p,
ol,
ul {
    line-height: 160%;
}

ul li {
    padding: 2px 0 5px 0;
    background: url(../images/img4.gif) repeat-x;
}

ul li.first {
    background: none;
}

.fl {
    float: left;
}

.fr {
    float: right;
}

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

a {
    text-decoration: none;
    color: #000;
}

strong {
    color: #D9C09A;
}

.mtop {
    margin-top: 30px;
}
.top {
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 10px;
    background-color: #f8f8f8; 
}

.logo img {
    width: 300px;
    height: auto;
    margin-left: 50px;
}

.search {
    position: relative; 
    margin-right: 170px; 
}

.search input {
    padding: 10px 40px; 
    border: 4px solid  #326663;
    border-radius: 20px; 
    width: 100%; 
}

.search input::placeholder {
    color: #326663;
    font-size: 20px;
}

.search input {
    background: url('../images/ss.png') no-repeat right 10px center;
    background-size: 20px 20px; 
}
.header {
    width:100%;
    height: 80px;
    margin: 0 auto ;
    background-color: #326663;
}

.header ul {
    list-style: none;
    padding-top: 12px;     /* 适当调整垂直位置 */
    text-align: center;    /* 让菜单整体居中 */
    margin: 0;
}

.header li {
    display: inline-block;
    width: 160px;          /* 与原来的 a 宽度一致 */
    text-align: center;
    vertical-align: top;
    position: relative;    /* 为下拉菜单提供定位参考 */
}

/* 修改 a 标签样式，去掉浮动和左边距 */
.header li a {
    display: block;
    float: none;
    margin-left: 0;
    width: auto;
    color: #fff;
    font-size: 20px;
    line-height: 55px;     /* 根据 header 高度调整，原 header 高度 80px，减去上下内边距 */
}

.header li a:hover {
    color: #000;
}

.header li span {
    display: inline-block;
    width: 1px;
    height: 12px;
    background: #fff;
    position: absolute;
    right: 0;
    top: 8px;
}

.header li.first a {
    border: none;
}
.banner{
    width:100%;
    height: 300px;
    overflow: hidden;
    margin: 0 auto;
    margin-bottom: 50px;
}
.banner img{
    width: 100%;
    margin-top: -100px;
}
.content {
    width: 1200px;
    margin: 0px auto 60px;
    
}

.tb {
    background-image: url(../images/bt.png);
    background-size: 100% 100%; /* 背景图完整铺满 */
    background-repeat: no-repeat;
    width: fit-content;         /* 随文字自动适配宽度 */
    min-width: 160px;           /* 最小宽度：比200px小，区分长短标题 */
    height: 50px;
    margin: 20px auto 50px;     /* 保持水平居中 */
    padding: 0 23px;            /* 左右内边距：文字和框边留舒适空隙 */
    display: block;             /* 保证 margin 居中生效 */
}

.tb-left {
    margin: 70px 0 20px !important; /* 左对齐样式 */
    padding: 0 20px;                /* 同步内边距，保持视觉一致 */
}

.tt {
    text-align: center;
    font-size: 25px;
    color: #fff;
    line-height: 50px; /* 行高=框高，完美垂直居中 */
    margin: 0;          /* 清除默认外边距，避免偏移 */
    white-space: nowrap;/* 防止文字换行 */
}

.jsdt-desc {
    position: absolute;
    left: 0;
    top: 650px;
    width: 280px;
    font-size: 14px;
    color: #000;
    line-height: 26px;
    text-align: left;
    text-indent: 2em;
    max-height: 208px;
    overflow: hidden;
    z-index: 10;
}

.footer {
    width: 100%;
    margin-top: 60px;
    text-align: center;
    background: #326663;
    line-height: 90px;
    color: white;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 3px;
}
.colOne {
    float: left;
    width: 850px;
}

.colOne p,
.colTwo p {
    text-indent: 2em;
    margin-bottom: 30px;
}

.imbig {
    display: block;
    margin: 0 auto;
}

.ims {
    display: block;
    margin: 0 auto 10px;
}

.indent {
    margin: 0 0 20px 280px;
    font-size: 16px;
    line-height: 28px;
}

.indent-r {
    font-size: 16px;
    line-height: 28px;
}

.image-l {
    float: left;
    margin: 0;
}

.image-r {
    float: right;
    margin-left: 20px;
}

.colTwo {
    float: right;
    width: 300px;
}

.colTwo h3 {
    margin-top: 10px;
}

.colTwo p {
    margin-bottom: 40px;
    line-height: 30px;
}

.imgbtm {
    display: block;
    margin: 20px auto;
    width: 100%;
}

.p1-im {
    float: left;
    margin-right: 20px;
}

.p1-p {
    line-height: 28px;
    font-size: 14px;
    margin-bottom: 20px;
}

.p1-p1 {
    margin-left: 526px;
}

.p1-h3 {
    padding: 30px 100px;
}


.fs {
    display: inline-block;
    margin: 30px 25px;
    padding: 20px;
    border: 1px solid #E8D6B4;
    width: 500px;
    height: 333px;
}

.techan {
    overflow: hidden;
}

.t-box {
    width: 370px;
    padding: 10px;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
    float: left;
    margin-bottom: 30px;
    border-radius: 20px;
    background-color: #326663;
}
.t-box:hover{
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.5);
}
.t-box h1 {
    text-align: center;
    margin: 10px 0;
    color: #fff;
}

.t-box p {
    text-indent: 2em;
    color: #fff;
}

.t-box img {
    width: 370px;
    height: 260px;
}


.btm {
    margin-top: 20px;
    overflow: hidden;
}

.btm_box img {
    width: 300px;
}

.btm_box {
    overflow: hidden;
}

.btm_box:hover {
    background-color: #eee;
}

.mbb_left {
    width: 300px;
    padding: 20px;
}

.mbb_right {
    width: 840px;
    padding: 20px 0;
}

.mbb_right p {
    padding-right: 100px;
    line-height: 24px;
    margin-bottom: 10px;
}

.mbb_right h2 {
    margin-bottom: 12px;
    background-image: none;
}

.sp video {
    width: 100%;
}
.container {
    background-color: #326663;
    padding: 20px;
    color: #000;
}

.section {
    display: flex;
    margin-bottom: 20px;
    background-color:#fff;
    padding: 10px;
    border-radius: 5px;
}

.left {
    flex: 1;
    padding: 10px;
}

.right {
    flex: 1;
    padding: 10px;
}

.section img {
    max-width: 400px;
    height: auto;
    border-radius: 5px;
    margin-left: 100px;
}

.reverse {
    flex-direction: row-reverse; 
}
.hz {
    background-color: #326663;
    padding: 20px;
    color: white;
    margin-top: 60px;
}

.hz-t {
    background-color: white;
    color: #326663;
    padding: 10px;
    text-align: center;
   margin: 0 auto;
   margin-top: -40px;
   margin-bottom: 40px;
    width: 100px;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.5);
}

.ls {
    display: flex;
}

.ls-zt {
    flex: 1;
    padding-right: 10px;
}

.ls-zt img {
   width:400px;
    height: auto;
}

.ls-yb {
    flex: 2;
    display: flex;
    flex-direction: column;
}

.ls-yt {
    flex: 1;
    padding-bottom: 10px;
}

.ls-yt img {
    width: 700px;
    height: auto;
    margin-left: 20px;
}

.ls-yz {
    background-color: white;
    color: black;
    padding: 10px;
}

.header li.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;          /* 紧贴父级底部 */
    left: 0;            /* 左对齐父级 */
    min-width: 100%;    /* 宽度与父级相同 */
    background-color: #326663;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    border-radius: 12px;
    padding: 8px 0;
    z-index: 1001;
    list-style: none;
    text-align: center; /* 子菜单文字居中（可选） */
}

/* 子菜单项样式保持不变 */
.dropdown-menu li {
    display: block;
    float: none;
    margin: 0;
}

.dropdown-menu li a {
    float: none;
    margin: 0;
    padding: 10px 20px;
    width: auto;
    color: white;
    font-size: 16px;
    border-radius: 8px;
    background: none;
    white-space: nowrap; /* 防止文字换行 */
}

/* 鼠标悬停时显示 */
.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown > a {
    cursor: default;
}