body {
background: url("https://wiki.easecation.net/images/1/19/FC%E7%AC%AC%E4%B8%80%E5%A4%A7%E5%8E%85.jpg") no-repeat fixed 50% 0; background-size: cover; background-repeat: no-repeat; background-attachment: fixed; background-position: 50% 0;
}
body, html {
width: 100%; height: 100%; padding: 0; margin: 0; font-family: "Lantinghei SC", "Open Sans", Arial, "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", "STHeiti", "WenQuanYi Micro Hei", SimSun, sans-serif;
}
/* 响应式设计 */ @media (max-width: 768px) {
body { background-size: contain; }
}