.xt_about-title {width: 1200px;height: 118px;border-bottom: 1px solid #ddd;text-align: center;padding: 30px 0 10px 0;margin: 0 auto;}
.xt_about-title b {font-size: 25px;color: #19B1EB;font-weight: normal;margin-bottom: 15px}
.xt_about-title p {width: 100%;height: 20px;line-height: 20px;font-size: 20px;color: #7F7F7F;}
.xt_about-content {width: 1200px;margin: 20px auto 50px auto;line-height: 30px;}