body{margin:0;background:#F5F2EA;color:#252B2D;font-family:Arial,"Microsoft YaHei",sans-serif}header{background:#1C272B;color:white;padding:20px;display:flex;justify-content:space-between}a{color:#3F5F68;text-decoration:none}header a{color:#fff;margin-right:15px}main{max-width:1100px;margin:auto;padding:30px}article,.item,.card{display:block;background:#E9EEE9;padding:18px;margin:15px 0;border-radius:12px}img{max-width:240px;height:auto}@media(max-width:700px){header{display:block}main{padding:15px}}