* { margin: 0; padding: 0; box-sizing: border-box; }
body { margin: 0px; font-size: 14px; color: #333; font-family: Microsoft YaHei, tahoma, arial, Hiragino Sans GB, sans-serif; box-sizing: border-box; }
li { list-style: none; }
a { text-decoration: none; }
button { cursor: pointer; border: 0px; padding: 0px; outline: none; }
/*flex,两端垂直对齐*/
.flex-space-between-center { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.page-width { width: 1200px; margin: auto; }
.w16 { max-width: 1600px; height: 100%; margin: 0 auto; background: red; }