@media only screen and (max-width:680px){h1{font-size:36px;line-height:44px}h2{font-size:32px;line-height:40px}h3{font-size:24px;line-height:32px}h4{font-size:20px;line-height:28px}h5{font-size:16px;line-height:24px}h6{font-size:14px;line-height:22px}}