.k-container {
    width: 103%;
    max-width: 1500px;
    margin: 0 auto;
    padding: 0 82px;
    padding-left: 33px
}

.k-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.k-topbar {
    background: #0454F2;
    color: #fff;
    padding: 8px 0;
    font-size: 14px;
}

.k-top-left strong {
    font-size: 14px;
    font-weight: 600;
}

.k-top-right {
    gap: 18px;
}

.k-top-right .k-icon {
    margin-right: 6px;
    font-size: 16px;
    color: #fff;
}

.k-top-right .email-item,
.k-top-right .hotline {
    display: flex;
    align-items: center;
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
}

.k-top-right .email-item:hover {
    opacity: 0.8;
}

.k-header {
    background: #fff;
    padding: 12px 0;
    border-bottom: 1px solid #eee;
}

.k-logo img {
    height: 65px;
    object-fit: contain;
}

.k-logo-block {
    display: flex;
    align-items: center;
    gap: 15px;
}

.k-logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.k-logo-text .k-title {
    margin: 0;
    font-size: 18px;
    font-weight: 800;
    color: #000;
}

.k-logo-text .k-title span {
    color: #0454F2;
}

.k-logo-text .k-sub {
    margin-top: 4px;
    font-size: 13px;
    color: #666;
    font-style: italic;
}

.k-menu ul {
    display: flex;
    list-style: none;
    gap: 35px;
    margin: 0;
    padding: 0;
}

.k-menu a {
    color: #111;
    font-size: 16px;
    font-weight: 550;
    text-decoration: none;
}

.k-menu a:hover {
    color: #0454F2;
}

.k-menu li.has-sub>a {
    display: flex;
    align-items: center;
    gap: 6px;
}

.k-menu li.has-sub>a i {
    font-size: 14px;
    transition: 0.3s;
}

.k-menu li.has-sub:hover>a i {
    transform: rotate(180deg);
}

.k-menu li.has-sub {
    position: relative;
}

.k-menu li .sub-menu {
    display: none;
    position: absolute;
    background: #fff;
    list-style: none;
    margin: 0;
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.15);
    z-index: 999;
    min-width: 240px;
    top: calc(100% + 8px);
    left: 0;
}

.k-menu li.has-sub:hover .sub-menu {
    display: block;
}

.k-btn {
    background: #0454F2;
    color: #fff !important;
    padding: 10px 22px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
}

.k-menu li .sub-menu li a {
    display: block;
    padding: 10px 18px;
    font-size: 15px;
    color: #111;
    text-decoration: none;
    white-space: nowrap;
    --hover: #0454F2;
    box-shadow: inset 0 0 0 0 var(--hover);
    transition: box-shadow 1.0s ease, color 0.6s ease;
}

.k-menu li .sub-menu li a:hover {
    color: #fff !important;
    box-shadow: inset 500px 0 0 0 var(--hover);
}

.k-menu li.has-sub::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    height: 12px;
}

.buff-header-mobile {
    display: none;
}

/* Chỉ hiện trên mobile/tablet */
@media (max-width: 991px) {
    .mobile-logo-block {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .mobile-logo-block img {
        height: 55px;
        width: auto;
        object-fit: contain;
    }

    .mobile-logo-block .k-title {
        font-size: 18px;
        font-weight: 800;
        margin: 0;
    }

    .mobile-logo-block .k-sub {
        font-size: 13px;
        margin: 3px 0 0 0;
        color: #666;
        font-style: italic;
    }

    .k-header-wrapper,
    .k-topbar {
        display: none !important;
    }

    .buff-header-mobile {
        display: block !important;
        width: 100%;
        z-index: 9999;
    }

    .buff-mobile-topbar {
        background: #0454F2;
        padding: 10px 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 18px;
        color: #fff;
        font-size: 14px;
        font-weight: 500;
        line-height: 1;
    }

    .buff-mobile-topbar i {
        margin-right: 6px;
        color: #fff;
        font-size: 15px;
    }

    .buff-mobile-topbar span {
        display: flex;
        align-items: center;
        gap: 6px;
        white-space: nowrap;
    }

    .buff-mobile-bar {
        background: #fff;
        border-bottom: 1px solid #eee;
        padding: 8px 0;
    }

    .buff-mobile-inner {
        max-width: 1250px;
        margin: 0 auto;
        padding: 0 15px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .buff-mobile-toggle {
        width: 40px;
        height: 40px;
        background: #0454F2;
        border: none;
        border-radius: 6px;
        color: #fff;
        font-size: 20px;
    }

    /* === Mobile Menu Slide === */
    .buff-mobile-menu {
        position: fixed;
        top: 0;
        right: -280px;
        width: 280px;
        height: 100vh;
        background: #fff;
        padding: 20px;
        transition: .3s;
        z-index: 10010;
        box-shadow: -2px 0 6px rgba(0, 0, 0, .2);
    }

    .buff-mobile-menu.active {
        right: 0;
    }

    .buff-close {
        position: absolute;
        top: 15px;
        right: 15px;
        background: none;
        border: none;
        font-size: 28px;
        color: #0454F2;
    }

    .buff-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, .45);
        z-index: 10000;
    }

    .buff-overlay.active {
        display: block;
    }

    .buff-mobile-nav {
        list-style: none;
        padding: 0;
        margin-top: 50px;
    }

    .buff-mobile-nav li a {
        display: block;
        padding: 14px 0;
        border-bottom: 1px solid #eee;
        color: #111;
        font-size: 15px;
    }

    .buff-has-sub>a {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .buff-has-sub i {
        transition: .25s;
    }

    .buff-has-sub.open>a i {
        transform: rotate(180deg);
    }

    .buff-submenu {
        display: none;
        list-style-type: none !important;
    }

    .buff-has-sub.open .buff-submenu {
        display: block;
    }
}