*{margin:0;padding:0;box-sizing:border-box}
body{background:#f7f8fa;color:#333;font-size:14px;line-height:1.6}
.header{background:var(--main);color:#fff;padding:16px 0;text-align:center}
.nav{display:flex;gap:16px;padding:12px;background:#fff}
.nav a{color:#333;text-decoration:none}
.notice{background:#fff7e6;padding:10px;color:#ff7d00;margin:10px;border-radius:8px}
.banner img{width:100%;height:auto}
.goods_container{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;padding:10px}
.goods_item{background:#fff;border-radius:10px;overflow:hidden}
.goods_item img{width:100%;height:120px;object-fit:cover}
input,button,textarea{width:100%;margin:6px 0;padding:10px;border:1px solid #ddd;border-radius:6px}
button{background:var(--main);color:#fff;border:none}
.footer{text-align:center;padding:20px;color:#999}
.kefu_float{position:fixed;right:16px;bottom:100px;z-index:999}
.kefu_btn{width:48px;height:48px;background:var(--main);color:#fff;border-radius:50%;text-align:center;line-height:48px}
.kefu_box{position:absolute;bottom:60px;right:0;width:300px;height:400px;background:#fff;border-radius:10px;box-shadow:0 0 10px rgba(0,0,0,0.1);display:none}
.kefu_box.show{display:block}
.kefu_head{padding:12px;background:var(--main);color:#fff;border-radius:10px 10px 0 0}
.kefu_body{height:280px;padding:10px;overflow-y:auto}
.msg_bot{background:#f1f1f1;padding:8px 12px;border-radius:12px;float:left;margin:4px 0;max-width:80%}
.msg_user{background:var(--main);color:#fff;padding:8px 12px;border-radius:12px;float:right;margin:4px 0;max-width:80%}
.kefu_input{position:absolute;bottom:0;width:100%;padding:10px}