(function(){
    var imgs=[
        {src:"",link:''}
    ];

    // 中对联广告数据
    var middleCouplets = [];
    
    var ua = navigator.userAgent.toLocaleLowerCase(),
        mobileOn=ua.match(/(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i);
        dom=document.createElement('div'),
        style=document.createElement('style'),
        propaHTML='';
        num=parseInt(Math.random()*imgs.length);
    var adHeight = mobileOn ? '63px' : '100px';
    var coupletSize = mobileOn ? '70px' : '150px';
    
    // 添加对联广告样式
    style.innerHTML='.propa_bottom{position:fixed;max-width:1120px;width:100%;height:'+adHeight+';left:50%;transform:translateX(-50%);bottom:0;background:rgba(0,0,0,0);z-index:9999}'+
                    '.propa_bottom .container{max-width:1120px;margin:0 auto;width:100%}'+
                    '.propa_bottom img{display:block;width:100%;height:100%;object-fit:contain;margin:0 auto;}'+
                    '.middle_couplet_left{position:fixed;left:10px;top:50%;transform:translateY(-50%);z-index:999;width:'+coupletSize+';display:flex;flex-direction:column;gap:10px;}'+
                    '.middle_couplet_right{position:fixed;right:10px;top:50%;transform:translateY(-50%);z-index:999;width:'+coupletSize+';display:flex;flex-direction:column;gap:10px;}'+
                    '.middle_couplet_item{position:relative;width:'+coupletSize+';height:'+coupletSize+';border-radius:10px;overflow:hidden;box-shadow:0 2px 5px rgba(0,0,0,0.2);background:#fff;transition:transform 0.2s ease;margin-bottom:10px;}'+
                    '.middle_couplet_item:hover{transform:scale(1.05);}'+
                    '.middle_couplet_link{display:block;width:100%;height:100%;position:relative;}'+
                    '.middle_couplet_img{width:100%;height:100%;object-fit:cover;border:2px solid #ff3838;border-radius:10px;box-sizing:border-box;}'+
                    '.couplet_close{position:absolute;right:2px;top:2px;font-size:12px;padding:2px 5px;background:rgba(0,0,0,0.6);color:#fff;display:inline-block;cursor:pointer;z-index:1000;border-radius:3px;}'+
                    '.close{position:absolute;right:0;top:0;font-size:14px;padding:5px 10px;background:rgba(0,0,0,0.8);color:#fff;display:inline-block;}';
    
    // 底部浮动广告
    if(imgs[num].src){
        var dom1=document.createElement('div');
        dom1.innerHTML='<div class="propa_bottom"><div class="container"><a target="_blank" href="'+imgs[num].link+'" style="display:flex;align-items:center;justify-content:center;">'+'<img id="propa_bottom" src='+imgs[num].src+' /><span class="close">关闭</span></a></div></div>';
        if(document.cookie.search('propa=true')==-1){
            document.body.appendChild(dom1);
        }
    }
    
    // 响应式样式
    if(mobileOn){
        style.innerHTML+='@media screen and (max-width: 768px) { .propa_bottom { height: 63px; } .propa_bottom img { max-width: 100%; max-height: 63px; } }';
    }else{
        style.innerHTML+='@media screen and (min-width: 769px) { .propa_bottom { height: 100px; width: 1120px; } .propa_bottom img { max-height: 100px; } }';
    }
    
    // 创建中对联广告HTML
    if(middleCouplets.length > 0 && document.cookie.search('middle_couplet=true')==-1){
        // 随机打乱广告顺序
        shuffle(middleCouplets);
        
        // 左侧对联容器
        var leftCoupletHTML = '<div class="middle_couplet_left">';
        // 右侧对联容器
        var rightCoupletHTML = '<div class="middle_couplet_right">';
        
        // 确定每侧最多显示的广告数量
        var maxPerSide = 5;
        var leftCount = Math.min(maxPerSide, middleCouplets.length);
        var rightCount = Math.min(maxPerSide, middleCouplets.length);
        
        // 创建左侧对联
        for(var i = 0; i < leftCount; i++){
            var randomIndex = Math.floor(Math.random() * middleCouplets.length);
            leftCoupletHTML += '<div class="middle_couplet_item" data-id="left-'+i+'">' +
                '<a class="middle_couplet_link" target="_blank" href="' + middleCouplets[randomIndex].web + '">' +
                '<img class="middle_couplet_img" src="' + middleCouplets[randomIndex].pic + '" />' +
                '</a>' +
                '<span class="couplet_close">关闭</span>' +
                '</div>';
        }
        leftCoupletHTML += '</div>';
        
        // 创建右侧对联
        for(var i = 0; i < rightCount; i++){
            var randomIndex = Math.floor(Math.random() * middleCouplets.length);
            rightCoupletHTML += '<div class="middle_couplet_item" data-id="right-'+i+'">' +
                '<a class="middle_couplet_link" target="_blank" href="' + middleCouplets[randomIndex].web + '">' +
                '<img class="middle_couplet_img" src="' + middleCouplets[randomIndex].pic + '" />' +
                '</a>' +
                '<span class="couplet_close">关闭</span>' +
                '</div>';
        }
        rightCoupletHTML += '</div>';
        
        propaHTML = leftCoupletHTML + rightCoupletHTML;
    }
    
    document.getElementsByTagName('head')[0].appendChild(style);
    
    // 添加中对联广告
    if(propaHTML) {
        dom.innerHTML=propaHTML;
        document.body.appendChild(dom);
    }
    
    // 处理底部广告关闭
    for(var i=0,max=document.getElementsByClassName('close').length;i<max;i++){
        document.getElementsByClassName('close')[i].onclick=function(event){  
            event.preventDefault();
            var adElement = this.closest('.propa_bottom') || this.parentNode;
            adElement.style.display='none';
            var expires = 24 * 60 * 60 * 1000;
            var date = new Date(+new Date()+expires);
            document.cookie="propa=true;expires="+date.toUTCString(); 
        }
    }
    
    // 处理对联广告关闭
    for(var i=0,max=document.getElementsByClassName('couplet_close').length;i<max;i++){
        document.getElementsByClassName('couplet_close')[i].onclick=function(event){  
            event.preventDefault();
            event.stopPropagation();
            var adElement = this.closest('.middle_couplet_item');
            adElement.style.display='none';
            // 检查是否所有同侧广告都已关闭
            var parentContainer = this.closest('.middle_couplet_left, .middle_couplet_right');
            var visibleAds = parentContainer.querySelectorAll('.middle_couplet_item[style="display: none;"]');
            if(visibleAds.length === parentContainer.querySelectorAll('.middle_couplet_item').length) {
                parentContainer.style.display = 'none';
            }
            
            var expires = 24 * 60 * 60 * 1000;
            var date = new Date(+new Date()+expires);
            document.cookie="middle_couplet_"+adElement.getAttribute('data-id')+"=true;expires="+date.toUTCString(); 
        }
    }
    
    // 辅助函数：随机打乱数组
    function shuffle(array) {
        for (let i = array.length - 1; i > 0; i--) {
            const j = Math.floor(Math.random() * (i + 1));
            [array[i], array[j]] = [array[j], array[i]];
        }
        return array;
    }
})();