.chin {  font-size: 13px; letter-spacing: 1px}
.chbig {  font-size: 15px; letter-spacing: 2px}
.smaii {  font-size: 12px; letter-spacing: 1px}
.longwei {  letter-spacing: 3px; word-spacing: 3px; font-size: 13px}
.small2 {  font-size: 11px}