.color-white {
    color: #fff;
}

#main {
    background: url('./img/qt_main.png') no-repeat center;
    background-size: cover;
}
#main .main_title {
    text-align: center;
    padding: 60px 20px 30px;
    background: linear-gradient(90deg, #d7000f, #ff5757);
    color: #fff;
}
#main .main_title h1 {
    font-size: 36px;
    margin-bottom: 10px;
}


.feature-box {
    background: url('./img/vt_1.jpg') no-repeat;
    background-size: cover;
}
.feature-box.box2 {
    background-image: url('./img/vt_2.jpg');
}
.feature-box.box3 {
    background-image: url('./img/vt_3.jpg');
}


.quytrinh {
    padding: 2% 30px 2% 60px;
}

.qt_main {
    border-left: 5px solid #f00;
    padding: 40px 0;
}

.qt_main .qt_box {
    display: flex;
    margin-bottom: 60px;
}

.qt_main .qt_box .num {
    margin: auto 40px auto -42px;
    font-size: 30px;
    background-color: #fff;
    border-radius: 50%;
    box-shadow: 0 0 10px #ff2222;
    border: 5px solid #f00;
    color: #f00;
    width: 80px;
    height: 80px;
    display: flex;
    justify-content: center;
    flex-direction: column;
    text-align: center;
}
.qt_main .qt_box .title {
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 10px;
}
.qt_main .qt_box .info {
    width: 100%;
    max-width: calc(100% - 150px);
    padding: 20px;
    border-radius: 15px;
    border-left: 5px solid #f00;
    box-shadow: 2px 2px 10px #555;
    background: linear-gradient(298deg, #e5e5e5, #ffffff);
}
.qt_main .qt_box .text {
    font-size: 16px;
}

.hoptac {
    padding: 40px 0;
}
.hoptac .ht_main {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.hoptac .ht_main .ht_box {
    width: 48%;
    margin: 20px 1%;
    background: url('./img/1-min.jpg') no-repeat;
    background-size: cover;
    min-height: 300px;
    border-radius: 10px;
    overflow: hidden;
}
.hoptac .ht_main .ht_box.box1 {
    background-image: url('./img/1-min.jpg');
}
.hoptac .ht_main .ht_box.box2 {
    background-image: url('./img/2-min.jpg');
}
.hoptac .ht_main .ht_box.box3 {
    background-image: url('./img/3-min.jpg');
}
.hoptac .ht_main .ht_box.box4 {
    background-image: url('./img/4-min.jpg');
}

.hoptac .ht_main .ht_box .info {
    padding: 20px;
    height: 100%;
    display: flex;
    background: linear-gradient(0deg, #3b3b3b, transparent);
    flex-direction: column;
}
.hoptac .ht_main .ht_box .info .title {
    margin-top: auto;
    margin-bottom: 20px;
    text-align: center;
    color: #fff;
    font-size: 24px;
    font-weight: bold;
}
.hoptac .ht_main .ht_box .info .text {
    text-align: center;
    color: #fff;
    font-size: 16px;
    line-height: 24px;
}

@media screen and (max-width: 1000px) {
    #main {
        margin-top: 30px !important;
    }
}


@media screen and (max-width: 640px) {
    body {
        padding-top: 40px;
    }
    .qt_main .qt_box .info {
        max-width: calc(100% - 80px);
    }
    .qt_main .qt_box .num {
        margin-right: 20px;
    }
}


@media screen and (max-width: 400px) {
    .quytrinh {
        padding: 2% 45px;
    }
    .qt_main .qt_box .info {
        max-width: calc(100% - 80px);
    }
    .qt_main .qt_box .num { 
        margin: auto 10px auto -42px;
    }
    .qt_main .qt_box .info {
        max-width: calc(100% - 40px);
    }
}