如何使Bootstrap输入字段与其父字段完全相同的100％？
正如steve-obrien在Bootstrap Issue #1058写道：
Setting to 100% does not work when applied directly to an input field as it does not take in to account the padding. So you end up with 100% of the container plus the padding on the input Box,so the input Box usually breaks outside its container.
解决方法
应用输入块级类对我来说非常适合，跨越不同的屏幕宽度。它由
Bootstrap in
mixins.less定义如下：
// Block level inputs
.input-block-level {
display: block;
width: 100%;
min-height: 28px; // Make inputs at least the height of their button counterpart
.Box-sizing(border-Box); // Makes inputs behave like true block-level elements
}
这与his comment on issue #1058年的“assembler”建议的风格非常相似。
