/* 基础样式：reset 与全局 */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    background: #f5f6f8;
    color: #333;
}
button { font-family: inherit; cursor: pointer; }
input { font-family: inherit; }