.txt_head{font-size:18px; line-height:32px; font-weight:bolder;}
.txt_head_lite{font-size:18px; line-height:32px;}

.txt18{font-size:15px; line-height:23px; }
.txt18w{font-size:15px; line-height:26px; }
.txt18n{font-size:15px; line-height:18px; }

.txt16{font-size:13px; line-height:19px; }
.txt16w{font-size:13px; line-height:24px; }
.txt16n{font-size:13px; line-height:17px; }