*{
    margin: 0;
    padding:0;
}
body{
    background-color: #f6f9fa;
    margin: 0 auto;
    padding: 0;
    width: 100%;
    height: auto;
}
a:link,a:visited {
    text-decoration: none;
    color: #212121;
}


.body-all {
    width: 900px;
    height: auto;

    /* 关键修改：删除 float: left，保留 margin: 0 auto */
    margin: 0 auto;

    /* 如果内部子元素需要居中，可以保留 flex，但通常最外层不需要 align-items: center */
    overflow-y: auto;

}

/*导航*/
.top_bar{
    width: 900px;
    height: 80px;
    background-color: #f6f9fa;
    position: fixed;
    top: 0;
    z-index: 999;


}

.top_bar .top_ob{
    list-style-type: none;
    height: 50px;
    line-height: 80px;
    padding: 15px 0 15px 0;
    overflow: hidden;

}
.top_block{
    width: 150px;
    height: 50px;
    float: left;
    line-height: 50px;
    text-align: center;
    overflow: hidden;
    border-radius: 4px;
    box-shadow: 2px 5px 5px #eef6ea;
}
.top_block a{
    width: 150px;
    height: 50px;
    float: left;
    overflow: hidden;
}
.top_box{
    width: 150px;
    /*height: 50px;*/
    float: left;
    color: #212121;
    opacity: 0.7;
    font-family:  "宋体", serif, Arial, Helvetica;
    font-size: 20px;

}


.top_box:hover{
    color: #f90;
    opacity: 1;
}
/*正文部分*/


/*图片部分*/

.container{
    width: 900px;
    height: auto;
    text-align: center;
    position: relative;
    margin-top: 150px;

}

.container::after {
    content: "";
    display: block; /* 或 table */
    clear: both;
}
.container img{
    cursor: pointer;
    width: 100%;
    /*transition: all 0.5s ease;*/
    display: block;
}


.container .box_border{
    width: 900px;
    height: auto;
    margin-bottom: 30px;
    margin-top: 10px;
    text-align: center;
    position: relative;
    column-count: 2;

}
.container .box_border .box{
    width: 440px;
    overflow: hidden;
    border-radius: 8px;
    margin-bottom: 12px;
}

/* --- 2. 模态框背景 (默认隐藏) --- */
.modal {

    position: fixed; /* 固定定位，覆盖整个视口 */
    z-index: 9999; /* 确保在最上层 */
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto; /* 允许滚动，防止大图超出屏幕 */
    background-color: rgba(200, 200, 200, 0.6); /* 半透明黑色背景 */
    /* 关键：启用 Flex 布局以实现居中 */
    display: none;
    justify-content: center; /* 主轴(水平)居中 */
    align-items: center;     /* 交叉轴(垂直)居中 */
}
/* --- 3. 模态框内的大图 --- */
.modal-content {
    margin: auto;
    display: block;
    width: 80%; /* 大图占据屏幕宽度的80% */
    max-width: 900px; /* 限制大图最大宽度，防止过大 */
    max-height: auto; /* 限制最大高度，防止超出屏幕 */
    object-fit: contain; /* 保持图片比例，完整显示 */

    /* 进入动画 */
    animation-name: zoomIn;
    animation-duration: 0.4s;
}
/* --- 4. 关闭按钮 (可选) --- */
.close-btn {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.close-btn:hover,
.close-btn:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}
/* --- 5. 定义缩放动画关键帧 --- */
@keyframes zoomIn {
    from {transform: scale(0.8); opacity: 0;}
    to {transform: scale(1); opacity: 1;}
}

/* --- 6. 响应式适配 --- */
@media only screen and (max-width: 700px) {
    .modal-content {
        width: 95%; /* 小屏幕上大图更宽 */
    }
}



/*.container img:hover{*/
    /*transform:scale(1.05);*/
    /*-webkit-transform: scale(1.05);*/
    /*-moz-transform: scale(1.05);*/
    /*-ms-transform: scale(1.05);*/
    /*-o-transform: scale(1.05);*/
    /*z-index: 2;*/
/*}*/

.container .body_bar{
    width: 900px;
    height: auto;
    text-align: center;
    position: relative;
    float:left;
    margin-top:10px;
}
.container .body_bar2{
    width: 900px;
    height: auto;
    text-align: center;
    position: relative;
    float:left;

}
.container .body_bar .bar1 p{
    text-align: left;
    margin-left: 15px;
    opacity: 0.7;
    font-family:  "宋体", serif, Arial, Helvetica;
    font-size: 20px;
    border-radius: 8px;

}
.container .body_bar .bar1{
    cursor: pointer;
    width: auto;
    height: 25px;
    padding: 8px 10px 8px 5px;
    text-align: center;
    position: relative;
    float:left;
    box-shadow: 2px 5px 5px #eef6ea;
    border-radius: 6px;
}
.container .body_bar2 .bar2 p{
    text-align: center;
    opacity: 0.7;
    font-family:  "宋体", serif, Arial, Helvetica;
    font-size: 20px;
    border: 1.5px solid black;
    border-radius: 4px;

}
.container .body_bar2 .bar2{
    cursor: pointer;
    width: 100px;
    height: 20px;
    margin: 10px;
    text-align: center;
    position: relative;
    float:left;



}
.container .body_bar .bar3{
    width: 900px;
    margin: 10px 0;
    height: auto;
    text-align: center;
    position: relative;
    float: left;
}
.container .body_bar .bar3 p{
    opacity: 0.9;
    font-family:  "宋体", serif, Arial, Helvetica;
    font-size: 15px;
    line-height:22px;
    text-align:justify;
    letter-spacing: .05rem;

}


.container .body_bar .bar1 p:hover{
               color: red;
               opacity: 1;
}
.container .body_bar2 .bar2 p:hover{
               color: red;
               opacity: 1;
               border: 1.5px solid red;
}

.container .body_bar .bar2{
    width: 900px;
    height: 20px;
    margin: 10px;
    text-align: center;
    position: relative;
    float: left;
}
.container .body_bar .bar2 p{
    text-align: center;
    opacity: 0.7;
    font-family:  "宋体", serif, Arial, Helvetica;
    font-size: 20px;

}


/*脚部信息*/
.footing{
    width: 900px;
    height: 60px;
    background-color: #f5f8f9;
    margin-top: 100px;
    bottom: 0;
}



.footing .footing_bottom{
    width:900px;
    background-color: #f5f8f9;
    overflow: hidden;
    height: 40px;}

.footing .footing_bottom .foot_cell{
    width:130px;
    float: left;
    height:20px;
    font-family:  "宋体", serif, Arial, Helvetica;
    font-size: 15px;
    margin: 10px 0 10px 24px;
    cursor: pointer;
    opacity: 0.7;
}

.footing .footing_bottom .foot_cell1{
    width:260px;
    height:20px;
    float: left;
    font-family:  "宋体", serif, Arial, Helvetica;
    font-size: 15px;
    margin: 10px 10px;
    cursor: pointer;
    opacity: 0.7;
}
.footing .footing_bottom .foot_cell .foot_cell2{
    width:130px;
    float: left;
    cursor: pointer;
    opacity: 0.5;
}
.footing .footing_bottom .foot_cell a{
    width:130px;
    height:20px;
    float: left;
}
.footing .footing_bottom .foot_cell3{
    width:60px;
    height:20px;
    float: left;
    margin: 12px 12px;
    opacity: 0.7;
}