/* ==================== BANNER DƯỚI CHÂN - CỐ ĐỊNH, ĐẸP, GỌN ==================== */
.banner-group {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 10px 0;
    background: transparent;
    z-index: 9999;
    text-align: center;
}
.banner-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
    max-width: 1090px;
    margin: 0 auto;
    position: relative;
}
.banner-item {
    width: 520px;
    height: 68px;
}
.banner-item img {
    width: 520px;
    height: 68px;
    object-fit: contain;
    display: block;
}
.close-btn {
    position: absolute;
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.7);
    color: #fff;
    width: 36px;
    height: 36px;
    line-height: 34px;
    font-size: 24px;
    font-weight: bold;
    text-align: center;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
}

/* Mobile: xếp dọc */
@media (max-width: 768px) {
    .banner-item {
        width: 100%;
        max-width: 520px;
        height: auto;
    }
    .banner-item img {
        width: 100%;
        height: auto;
        max-height: 68px;
    }
}

/* ==================== 2 BANNER DỌC 2 BÊN (chỉ PC) ==================== */
.banner-left, .banner-right {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    width: 160px;
    z-index: 9998;
}
.banner-left { left: 10px; }
.banner-right { right: 10px; }
.banner-side-inner {
    position: relative;
    display: inline-block;
}
.banner-left img, .banner-right img {
    width: 100%;
    height: auto;
    display: block;
}
.close-side {
    position: absolute;
    top: 5px;
    right: 5px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    width: 24px;
    height: 24px;
    line-height: 22px;
    text-align: center;
    font-size: 16px;
    font-weight: bold;
    border-radius: 50%;
    cursor: pointer;
}

/* Ẩn hoàn toàn banner dọc trên mobile */
@media (max-width: 768px) {
    .banner-left, .banner-right {
        display: none !important;
    }
}