.retrun_phone{margin:0 auto;line-height:40px;text-align:center;background-color:#5e89ff;color:#fff;border-radius:5px;width:80%;bottom:20px;margin-left:50%}.btn-box,.retrun_phone{position:fixed;transform:translateX(-50%)}.btn-box{margin-left:50%;width:100%;background-color:#fff;bottom:0;height:50px}.head{width:980px;margin:0 auto}.retrun_pc{margin:20px 0;cursor:pointer;color:#145af5;font-size:1.125rem;font-weight:700;display:inline-block}.retrun_pc:hover{color:#49a8eb}.pcImg{display:none}@media (max-width:500px){.head{width:100%;margin:0 auto}.retrun_pc{display:none}.video_box{margin-top:1.25rem}}@media (min-width:31.25rem){.btn-box,.flex,.retrun_phone{display:none}.pcImg{display:block}.phoneImg{display:none}.video_box{margin-top:5px}.tc{width:100vw;height:133px;background-color:#f1f1f1}}