/* 图片预览小弹窗 —— 居中卡片,不铺满屏 */
#sg-lb{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.45);
z-index:2147483000;display:none;-webkit-tap-highlight-color:transparent}
#sg-lb.on{display:block}
#sg-lb .sg-lb-bd{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
background:#fff;border-radius:6px;box-shadow:0 10px 40px rgba(0,0,0,.35);
padding:12px;text-align:center;max-width:min(560px,90vw);max-height:86vh;
box-sizing:border-box;cursor:default}
#sg-lb .sg-lb-img{max-width:100%;max-height:66vh;width:auto;height:auto;
display:block;margin:0 auto;border-radius:3px}
#sg-lb .sg-lb-cap{color:#333;font-size:14px;line-height:1.8;margin-top:10px;
padding:0 24px;word-break:break-all}
#sg-lb .sg-lb-x{position:absolute;top:-13px;right:-13px;width:28px;height:28px;
line-height:26px;text-align:center;border-radius:50%;background:#fff;color:#555;
font-size:20px;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.3);
font-family:Arial,sans-serif;user-select:none}
#sg-lb .sg-lb-x:hover{background:#f5f5f5;color:#000}
#sg-lb .sg-lb-p{position:absolute;top:50%;margin-top:-18px;width:30px;height:36px;
line-height:34px;text-align:center;color:#fff;background:rgba(0,0,0,.35);
font-size:26px;cursor:pointer;font-family:Arial,sans-serif;user-select:none;
border-radius:3px}
#sg-lb .sg-lb-p:hover{background:rgba(0,0,0,.6)}
#sg-lb .sg-lb-prev{left:14px}
#sg-lb .sg-lb-next{right:14px}
@media(max-width:767px){
#sg-lb .sg-lb-bd{max-width:92vw;padding:10px}
#sg-lb .sg-lb-img{max-height:56vh}
#sg-lb .sg-lb-cap{font-size:13px;padding:0 8px}
}