/* 沃尔玛品牌色：主蓝#0070c0，辅助灰#f5f5f5，文字灰#333 */
        body { font-family: "Microsoft Yahei", Arial, sans-serif; color: #333; }
        .btn-walmart { background-color: #0070c0; color: white; }
        .btn-walmart:hover { background-color: #005ea6; }
        /* 表单焦点样式，提升用户体验 */
        input:focus { outline: 2px solid #0070c0; }