基础样式
UI组件
UI库中的CSS是通过SASS编译生成。
UI库与flexible.js配合使用。
UI库除了字体、边框宽度等，大部分是使用rem作为单位，可以在gulp中引入插件，自动计算。
扫描下面的二维码，查看在线demo
图标（base/icon.scss）
先画svg矢量图，再制作成特殊字体图标，iconfont上面有许多开源的图标。
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.ui-icon-add
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.ui-icon-more
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.ui-icon-arrow
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.ui-icon-return
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.ui-icon-checked
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.ui-icon-checked-s
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.ui-icon-info-block
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.ui-icon-success-block
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.ui-icon-warn-block
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.ui-icon-info
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.ui-icon-success
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.ui-icon-warn
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.ui-icon-next
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.ui-icon-prev
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.ui-icon-tag
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.ui-icon-tag-pop
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.ui-icon-tag-s
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.ui-icon-warn-lg
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.ui-icon-close
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.ui-icon-close-progress
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.ui-icon-close-page
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.ui-icon-emo
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.ui-icon-delete
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.ui-icon-search
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.ui-icon-order
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.ui-icon-news
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.ui-icon-personal
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.ui-icon-dressup
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.ui-icon-cart
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.ui-icon-history
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.ui-icon-wallet
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.ui-icon-refresh
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.ui-icon-thumb
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.ui-icon-file
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.ui-icon-hall
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.ui-icon-voice
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.ui-icon-unfold
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.ui-icon-gototop
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.ui-icon-share
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.ui-icon-home
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.ui-icon-pin
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.ui-icon-star
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.ui-icon-bugle
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.ui-icon-trend
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.ui-icon-unchecked
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.ui-icon-unchecked-s
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.ui-icon-play-active
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.ui-icon-stop-active
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.ui-icon-play
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.ui-icon-stop
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.ui-icon-set
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.ui-icon-add-group
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.ui-icon-add-people
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.ui-icon-pc
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.ui-icon-scan
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.ui-icon-tag-svip
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.ui-icon-tag-vip
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.ui-icon-male
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.ui-icon-female
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.ui-icon-collect
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.ui-icon-commented
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.ui-icon-like
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.ui-icon-liked
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.ui-icon-comment
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.ui-icon-collected