.gray { background-color: #f5f5f5; }
.m_section { background-color: #fff; margin-bottom: 10px; }
.lz-block-center { display: flex; justify-content: center; align-items: center; margin-bottom: 20px; }
.lz-btn { display: inline-block; line-height: 30px; padding: 0 10px; white-space: nowrap; text-align: center; font-size: 12px; border: none; 
    border-radius: 2px; cursor: pointer;}
.lz-bg-blue { background-color: #0099FF; color: #fff; }