*,
*::before,
*::after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;width:100%;font-family:sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}img,picture,video,canvas,svg{display:block;max-width:100%;height:auto}input,button,textarea,select{font:inherit}p,h1,h2,h3,h4,h5,h6{overflow-wrap:break-word}ul,ol{list-style:none}a{text-decoration:none;color:inherit}button{border:none;background:none;cursor:pointer}table{border-collapse:collapse;border-spacing:0}fieldset{border:none;margin:0;padding:0}blockquote,q{quotes:none}blockquote::before,blockquote::after,q::before,q::after{content:''}

body{background: #f5f5f7;}
header{position:fixed;top:0;left:0;background:#fbfbfd;width: 100%;height: 50px;border-bottom: 1px solid #D5D5D5;}


#pageContent{margin: 0 auto;margin-top:100px;margin-bottom:100px;min-width:320px;max-width: 1000px;background: red;min-height: 100px;background:#FFFFFF;border-radius: 4px;}