#dm-master-footer, #dm-master-footer * {
    box-sizing: border-box;
}
#dm-master-footer ul,
#dm-master-footer ol,
#dm-master-footer li,
#dm-master-footer p,
#dm-master-footer h1,
#dm-master-footer h2,
#dm-master-footer h3,
#dm-master-footer h4,
#dm-master-footer h5,
#dm-master-footer h6 {
    margin: 0;
    padding: 0;
}
#dm-master-footer {
    width: 100%;
    background-color: #0a0e17; /* Nền đen sâu đồng bộ Header */
    color: #e2e8f0;
    border-top: 3px solid #dc2626; /* Viền trên đỏ tươi */
    font-family: 'Be Vietnam Pro', 'Roboto', Arial, sans-serif;
    position: relative;
    overflow: hidden;
}

/* KHUNG CHỨA 4 CỘT CHÍNH CĂN GIỮA MÀN HÌNH */
#dm-master-footer .dm-footer-main {
    max-width: 1540px;
    margin-left: auto !important;
    margin-right: auto !important;
    padding: 55px 24px 35px;
}

.dm-footer-grid {
    display: grid;
    grid-template-columns: 1.3fr 0.9fr 1.3fr 1.3fr;
    gap: 40px;
}

/* TIÊU ĐỀ CỘT CÓ GẠCH ĐỎ DƯỚI */
.dm-footer-col-title {
    font-size: 18px;
    font-weight: 800;
    color: #ffffff;
    text-transform: capitalize;
    margin-bottom: 8px;
    letter-spacing: 0.3px;
}
.dm-footer-col-line {
    width: 36px;
    height: 3px;
    background-color: #dc2626;
    border-radius: 2px;
    margin-bottom: 20px;
}

/* =====================================================
   CỘT 1: VỀ CHÚNG TÔI
===================================================== */
.dm-footer-brand-box {
    margin-bottom: 14px;
}
.dm-footer-logo-tn {
    background-color: #ffffff;
    padding: 4px 12px;
    border-radius: 6px;
    display: inline-block;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}
.dm-footer-logo-tn img {
    height: 38px;
    width: auto;
    display: block;
}
.dm-footer-company-name {
    color: #ffffff;
    font-size: 14.5px;
    font-weight: 800;
    margin-top: 8px;
    line-height: 1.3;
    text-transform: uppercase;
}
.dm-footer-slogan {
    color: #dc2626;
    font-size: 13px;
    font-style: italic;
    font-weight: 600;
    margin-bottom: 12px;
}
.dm-footer-desc-text {
    font-size: 13.5px;
    color: #94a3b8;
    line-height: 1.65;
    margin-bottom: 22px;
}

/* 4 Icon mạng xã hội tròn */
.dm-footer-social-row {
    display: flex;
    align-items: center;
    gap: 12px;
}
.dm-footer-social-circle {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background-color: #1e293b;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: background-color 0.2s ease, transform 0.2s ease;
}
.dm-footer-social-circle:hover {
    background-color: #dc2626;
    transform: translateY(-2px);
    color: #ffffff;
}

/* =====================================================
   CỘT 2: DANH MỤC LIÊN KẾT NHANH
===================================================== */
.dm-footer-menu-ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.dm-footer-menu-a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #cbd5e1;
    font-size: 13.5px;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s ease, padding-left 0.2s ease;
}
.dm-footer-menu-arrow {
    color: #94a3b8;
    font-size: 12px;
    transition: color 0.2s ease, transform 0.2s ease;
}
.dm-footer-menu-a:hover {
    color: #ffffff;
    padding-left: 6px;
}
.dm-footer-menu-a:hover .dm-footer-menu-arrow {
    color: #dc2626;
    transform: translateX(3px);
}

/* Huy hiệu Đang online */
.dm-footer-online-badge {
    margin-top: 18px;
    padding: 8px 14px;
    background-color: #1e293b;
    border: 1px solid #334155;
    border-radius: 6px;
    font-size: 12.5px;
    color: #e2e8f0;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
}
.dm-footer-online-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #22c55e; /* Chấm xanh lá cây online */
    box-shadow: 0 0 6px #22c55e;
}

/* =====================================================
   CỘT 3: BÀI VIẾT MỚI NHẤT (TỪ CSDL CÓ THUMBNAIL)
===================================================== */
.dm-footer-news-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.dm-footer-news-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    text-decoration: none;
}
.dm-footer-news-thumb {
    width: 72px;
    height: 60px;
    border-radius: 6px;
    overflow: hidden;
    flex-shrink: 0;
    background-color: #1e293b;
}
.dm-footer-news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}
.dm-footer-news-item:hover .dm-footer-news-thumb img {
    transform: scale(1.08);
}
.dm-footer-news-content {
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.dm-footer-news-title {
    font-size: 13.5px;
    font-weight: 600;
    color: #ffffff;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.2s ease;
}
.dm-footer-news-item:hover .dm-footer-news-title {
    color: #dc2626;
}
.dm-footer-news-date {
    font-size: 11.5px;
    color: #94a3b8;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.dm-footer-news-date svg {
    color: #dc2626; /* Icon lịch đỏ */
}

/* =====================================================
   CỘT 4: LIÊN HỆ & HỖ TRỢ TƯ VẤN (THÔNG TIN TỪ ẢNH XANH)
===================================================== */
.dm-footer-contact-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.dm-footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}
.dm-footer-contact-icon-circle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: #dc2626; /* Icon tròn đỏ nổi bật */
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 2px;
}
.dm-footer-contact-text-box {
    display: flex;
    flex-direction: column;
    font-size: 13.5px;
    line-height: 1.5;
}
.dm-footer-contact-label {
    font-size: 11px;
    color: #94a3b8;
    text-transform: uppercase;
    font-weight: 600;
}
.dm-footer-contact-val {
    color: #ffffff;
    font-weight: 600;
}
.dm-footer-contact-val a {
    color: #ffffff;
    text-decoration: none;
    transition: color 0.2s ease;
}
.dm-footer-contact-val a:hover {
    color: #dc2626;
}
.dm-footer-contact-sub {
    font-size: 11.5px;
    color: #94a3b8;
    font-style: italic;
    margin-top: 2px;
}

/* =====================================================
   THANH COPYRIGHT DƯỚI CÙNG (FOOTER BOTTOM)
===================================================== */
.dm-footer-bottom {
    background-color: #060910; /* Đen đậm hơn */
    border-top: 1px solid #1e293b;
    padding: 18px 24px;
}
#dm-master-footer .dm-footer-bottom-container {
    max-width: 1540px;
    margin-left: auto !important;
    margin-right: auto !important;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
}
.dm-footer-copyright-text {
    font-size: 12.5px;
    color: #94a3b8;
}
.dm-footer-copyright-text strong {
    color: #ffffff;
}
.dm-footer-bottom-links {
    display: flex;
    align-items: center;
    gap: 16px;
}
.dm-footer-bottom-links a {
    color: #94a3b8;
    font-size: 12.5px;
    text-decoration: none;
    transition: color 0.2s ease;
}
.dm-footer-bottom-links a:hover {
    color: #ffffff;
}
.dm-footer-bottom-pipe {
    color: #334155;
    font-size: 12px;
}

/* NÚT BACK-TO-TOP ĐỎ VUÔNG BO GÓC */
.dm-back-to-top-btn {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    background-color: #dc2626; /* Đỏ theo mẫu */
    color: #ffffff;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(220, 38, 38, 0.4);
    transition: background-color 0.2s ease, transform 0.2s ease;
}
.dm-back-to-top-btn:hover {
    background-color: #b91c1c;
    transform: translateY(-2px);
}

/* =====================================================
   RESPONSIVE BREAKPOINTS
===================================================== */
@media (max-width: 1199.98px) {
    .dm-footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 35px;
    }
}
@media (max-width: 767.98px) {
    .dm-footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .dm-footer-main {
        padding: 40px 16px 25px;
    }
    .dm-footer-bottom {
        padding: 16px;
    }
    .dm-footer-bottom-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}