/***/
/* 右下角悬浮返回按钮 */
.go-back {
    position: fixed;
    right: 25px;
    bottom: 25px;
    width: 50px;
    height: 50px;
    background-color: #0d4297;
    color: #fff;
    border-radius: 50%;
    text-align: center;
    line-height: 50px;
    font-size: 18px;
    z-index: 9999999;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(147, 8, 12, 0.3);
    transition: all 0.3s ease;
    border: none;
    outline: none;}
.go-back:hover {
    background-color: #b81015;
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(147, 8, 12, 0.4);}
.go-back:active {
    transform: translateY(0);}

/* 小屏适配 */
@media (max-width: 768px) {
    .go-back {
        width: 44px;
        height: 44px;
        line-height: 44px;
        font-size: 16px;
        right: 15px;
        bottom: 15px;}
}