.popup-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0,0,0,.5);
    z-index: 999;
}
.popup-modal {
    position: fixed;
    top: 40%;
    left: 30%;
    background: #fff;
    padding: 20px;
    border: 1px solid #ccc;
    width: 25%;
    height: auto;
    z-index: 1000;
}
@media (max-width: 600px) {
    .popup-modal {
        top: 40%;
        left: 5%;
        width: 80%;
    }
}
.popup-modal .header {
    height: 24px;
    line-height: 20px;
    text-align: center;
    border-bottom: 1px solid #ccc;
}
.popup-modal .footer {
    text-align: center;
}
.popup-modal .footer button {
    margin: 0 10px;
}
.close-popup {
    position: absolute;
    top: 0;
    right: 0;
    display: inline-block;
    width: 32px;
    height: 32px;
    --svg: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cpath fill='%23000' d='M16 2C8.2 2 2 8.2 2 16s6.2 14 14 14s14-6.2 14-14S23.8 2 16 2m5.4 21L16 17.6L10.6 23L9 21.4l5.4-5.4L9 10.6L10.6 9l5.4 5.4L21.4 9l1.6 1.6l-5.4 5.4l5.4 5.4z'/%3E%3C/svg%3E");
    background-color: currentColor;
    -webkit-mask-image: var(--svg);
    mask-image: var(--svg);
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-size: 100% 100%;
    mask-size: 100% 100%;
}