body{
    background-color: rgb(40, 40, 40);
    margin: 0;
}

#head_img{
    height: 100%;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    background-repeat: no-repeat;
    background-attachment: fixed;
    animation: bg-zoom 1.5s forwards; /* 动画时长和执行次数 */
    animation-delay: 0.1s;  /*动画延迟执行时间*/
    background-size: cover;
    background-position: center;
    background-attachment:fixed;
    transform: scale(1.5);
    opacity: 0;
    
}

@keyframes bg-zoom {
    0% {
        transform: scale(1.5);
        background: url("../images/bc/bc.jpg");
        background-size: cover;
        background-position: center;
        opacity: 0;
        background-repeat: no-repeat;
        background-attachment:fixed;
    }/*
    70%{
        transform: scale(1.1);
        background: url("../images/bc/bc.jpg");
        background-size: cover;
        background-position: center;
        opacity: 0.9;
        background-repeat: no-repeat;
        background-attachment:fixed;
    }*/
    100% {
        transform: scale(1);
        background: url("../images/bc/bc.jpg");
        background-size: cover;
        background-position: center;
        opacity: 1;
        background-repeat: no-repeat;
        background-attachment:fixed;
    }
}

#head_body{
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
}

.top_logos{
    height: 80px;
    width: 160px;
    /*border: 2px solid wheat;*/
    position: absolute;
    left: 200px;
    max-width: 100%;
    box-sizing: border-box;
}

/* 响应式：当屏幕宽度不足时隐藏logo */
@media screen and (max-width: 900px) {
    .top_logos {
        display: none;
    }
}

/* 中等屏幕：调整logo位置和大小 */
@media screen and (min-width: 901px) and (max-width: 1200px) {
    .top_logos {
        left: 5%;
        width: 140px;
    }
    
    #logo {
        width: 135px;
        height: 45px;
    }
}

.top_nav{
    position: absolute;
    right: 130px;
    height: 80px;
    width: 450px;
    /* border: 2px solid wheat; */
    z-index: 0;
}

.bt1{
    height: 40px;
    width: 70px;
    /* border: 1px solid wheat; */
    position: absolute;
    left: 10px;
    top: 20px;
    z-index: 1;
}

.bt2{
    height: 40px;
    width: 70px;
    /* border: 1px solid wheat; */
    position: absolute;
    left: 100px;
    top: 20px;
}

.bt3{
    height: 40px;
    width: 70px;
    /* border: 1px solid wheat; */
    position: absolute;
    left: 190px;
    top: 20px;
}

.bt4{
    height: 40px;
    width: 70px;
    /* border: 1px solid wheat; */
    position: absolute;
    left: 280px;
    top: 20px;
}

.bt5{
    height: 40px;
    width: 70px;
    /* border: 1px solid wheat; */
    position: absolute;
    left: 370px;
    top: 20px;
}

.top_center_tip{
    height: 200px;
    width: 100%;
    /* border: 2px solid wheat; */
    position: absolute;
    top: calc(25% + 80px);
    left: 0;
    text-align: center;
}

.top_center_tip > h1 {
    margin-top: 10px;
    margin-bottom: 10px;
    font-weight: 500;
    font-size: 76px;
    color: #ffffff;
}

h2{
    font-weight: 100;
    font-size: 20px;
    color: #ffffff;
}

.Dividing_H{
    display: inline-block;
    height: 5px;
    width: 80px;
    background-color: aquamarine;
    border-radius: 5px;
}


.top_left{
    position: absolute;
    left: 100px;
    top: 50px;
    width: 20px;
    height: 100px;
    /* border: 1px solid wheat;  */
}

.top_left_img{
    height: 100%;
    width: 100%;
    opacity: 0.5;
}

.top_right_img{
    height: 100%;
    width: 100%;
    opacity: 0.5;
}

.top_right{
    position: absolute;
    right: 100px;
    top: 50px;
    width: 20px;
    height: 100px;
    /* border: 1px solid wheat; */
}


.logo{
    height: 50px;
    width: 155px;
    max-width: 100%;
    max-height: 100%;
    position: absolute;
    top: 15px;
    left: 0px;
    object-fit: contain;
}

.nav_btn{
    background-color: #ffffff00;
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 40px;
}

.nav_btn:hover{
    cursor: pointer;
    background-color: #0000001b;
}

.nav_btn2:hover{
    cursor: pointer;
    background-color: #0000001b;
}

.nav_btn a{
    color: #ffffff;
}

.nav_diving{
    height: 2px;
    border-radius: 1px;
    width: 10px;
    background-color: rgb(255, 255, 255);
    position: absolute;
    left: 30px;
    margin-top: -6px;
    display: none;
    z-index: -90;
}

#center_body{
    position: relative;
    top: 100%;
    left: 0;
    padding: 0;
    margin: 0;
    width: 100%;
    background-color: rgb(255, 255, 255);
    text-align: center;
    padding-bottom: 70px;
}

.center_diving{
    height: 3px;
    width: 60px;
    background-color: rgb(231, 231, 231);
    position: relative;
    left: calc(50% - 30px);
    margin-top: -10px;
    border-radius: 1px;
}

.center_text{
    width: 100%;
    text-align: center;
}

.center_text_content{
    width: 100%;
    margin: 0;
    padding: 0;
    color: #949494;
    margin-top: 10px;
}

.center_diving_long{
    height: 3px;
    width: calc(100px + 10%);
    background-color: rgb(231, 231, 231);
    position: relative;
    left: calc(45% - 50px);
    margin-top: 40px;
}

.center_others{
    margin-top: 30px;
}

.center_text_content > a{
    text-decoration: none;
}

.top_button_left{
    height: 40px;
    width: 220px;
    border: 1px solid wheat;
    margin-left: calc(50% - 230px);
    float: left;
}

.top_button_right{
    height: 40px;
    width: 220px;
    border: 1px solid wheat;
    margin-left: calc(50% + 10px);
}

#center_body_up{
    height: 200px;
    width: 100%;
    position: absolute;
    top: 100%;
    background-color: #ffffff;
}

.center_others > img{
    height: 300px;
    width: 533.59px;
    margin-left: 10px;
    margin-right: 10px;
}

.the_next_body{
    position: relative;
    top: 100%;
    left: 0;
    width: 100%;
    padding-bottom: 80px;
    background-color: rgb(255, 255, 255);
    text-align: center; 
}

.phar1{
    height: 200px;
    width: 300px;
    /*border: 1px solid wheat;*/
    display: inline-block;
    margin-top: 30px;
    margin-left: 10px;
    margin-right: 10px;
    border-radius: 10px;
    box-shadow: 5px 5px 5px 1px rgba(0, 0, 0, 0.3);

}

.the_next_body > h3 a{
    color: #c0c0c0;
    font-weight: 50;
}

.the_next2_body{
    position: relative;
    top: 100%;
    left: 0;
    width: 100%;
    min-height: 650px;
    padding-bottom: 120px;
    background-color: rgb(255, 255, 255);
    text-align: center; 
}

.the_next2_body > .ifrContainer > iframe{
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    border: 0;
    z-index: 1;
}

.bottom{
    height: 80px;
    width: 100%;
    background-color: rgb(213, 213, 213);
    position: relative;
    top: 100%;
    left: 0;
}

.ifrContainer{
    margin-top: 30px;
    display: inline-block;
    background-color: rgb(0, 0, 0);
    position: relative;
    width: 100%;
    max-width: 800px;
    aspect-ratio: 800 / 480; /* 保持 800:480 的宽高比 */
    overflow: hidden;
}

/* 兼容不支持 aspect-ratio 的浏览器 */
@supports not (aspect-ratio: 800 / 480) {
    .ifrContainer {
        height: 0;
        padding-bottom: 60%; /* 480/800 = 0.6 */
    }
}

.ifrContainer > img{
    height: 100%;
    width: 100%;
    border: 0;
    position: absolute;
    top: 0;
    left: 0;
    object-fit: cover;
    z-index: 2;
}

.ifr_mask_img{
    background-size: 100%;
    /*background-image: url("../images/sf/vedioImg.png");*/
    background-repeat: no-repeat;
}

.ifr_mask{
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background-color: #000000;
    opacity: 0.5;
    cursor: pointer;
    z-index: 3;
}

.ifr_mask > img{
    height: 80px;
    width: 80px;
    position: absolute;
    top: calc(50% - 40px);
    left: calc(50% - 40px);
}

.icp {
	position: absolute;
	bottom: 0;
	right: 0;
	margin: 10px 0;
	width: 100%;
	height: 36px;
	white-space: pre;
	text-align: center;
	color: gray;
	z-index: 1000;
}

.icp > a {
    color: gray;
    text-decoration: none;
}

.icp > a:hover {
    color: aqua;
    text-decoration: none;
}

.phar1 > img{
    height: 200px;
    width: 300px;
    border-radius: 10px;
}

.phar1_mask{
    position: absolute;
    height: 200px;
    width: 300px;
    background-color: #00000000;
    z-index: 1000;
    margin-top: -200px;
    border-radius: 10px;
    color: #ffffff;
}

.phar1_mask_title{
    height: 40px;
    width: 300px;
    background-color: #000000af;
    border-radius: 0 0 10px 10px;
    margin-top: 160px;
    text-align: left;
    line-height: 40px;
}

.phar1_mask_title > h3{
    margin-left: 10px;
}

.slip_box{
    height: 10px;
    width: 300px;
    background-color: #000000af;
    margin-top: -200px;
    border-radius: 10px 10px 0 0;
    display: none;
    text-align: center;
    color: #ffffff;
    cursor: pointer;
}

.slip_box > h3{
    display: inline-block;
}

.banner{
    height: 80px;
    width: 100%;
    position: absolute;
    z-index: 99999;
    background-color: #ffffff00;
    
}


/*  0 ~ 160  */

.banner2{
    height: 80px;
    width: 100%;
    position: fixed;
    z-index: 99999;
    background-color: rgb(255, 255, 255);
    box-shadow: 5px 5px 5px 1px rgba(0, 0, 0, 0.3);
    display: none;
}

.nav_btn2{
    background-color: #ffffff00;
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 40px;
}

.nav_btn2 a{
    color: #000000;
}

.nav_diving2{
    height: 2px;
    border-radius: 1px;
    width: 10px;
    background-color: rgb(0, 0, 0);
    position: absolute;
    left: 30px;
    margin-top: -6px;
    display: none;
    z-index: -90;
}