一个看起来比较舒服的文本框样式，关键点在黄色背景那几点

.form-control {

display: block;

width: 100%;

height: 34px;

padding: 6px 12px;

font-size: 14px;

line-height: 1.428571429;

color: #555555;

vertical-align: middle;

background-color: #ffffff;

border: 1px solid #cccccc;

border-radius: 4px;

-webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);

box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);

-webkit-transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;

transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;

}

.form-control:focus {

border-color: #66afe9;

outline: 0;

-webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, 0.6);

box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, 0.6);

}