/* 全站基础样式：与页面模块样式分离 */
* { box-sizing: border-box; }
body, h1, h2, h3, p, ul, form { margin: 0; }
ul { padding: 0; list-style: none; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { cursor: pointer; }