body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #FFF;
}
.container {
    width: 1200px;
    margin: 0 auto;
    max-width: 100%;
}
img {
    max-width: 100%;
    height: auto;
}
.left {
    float: left;
}
.header {
    background: #5b4eb4;
    color: #fff;
    padding: 20px 20px;
}
.right {
    float: right;
}
.logo {
    text-align: center;
    width: 25%;
    margin-top: 10px;
}
.header .right {
    width: 75%;
    text-align: center;
    margin-bottom: 10px;
}
.section {
    overflow: hidden;
}
.margin {
   margin-bottom: 15px;
}
h1 {
    margin: 10px auto;
    text-transform: uppercase;
    font-size: 3vw;
}
.header p {
    font-size: 1.8vw;
    letter-spacing: 2px;
    font-weight: 300;
    margin: 0;
}

h2 {
    text-align: center;
    font-size: 32px;
    text-transform: uppercase;
    color: #FFE600;
    background-color: #5B4DB1;
    padding: 30px 0;
    margin: 0;
}
.vertical-center-2 img{
    width: calc(50% - 5px);
    float: left;
}
img.first {
    padding-right: 10px;
}
.section.footer {
    text-align: center;
    background: #5b4eb4;
    color: #fff;
    margin-bottom: 0;
    padding: 15px;
}
.boss .left {
    width: 30%;
    box-sizing: border-box;
    padding-right: 10px;
}
.boss .right {
    width: 70%;
}
.icon-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.section.context {
    color: #5b4eb4;
    background-color: #f1f1f3;
    padding: 15px 50px;
}
.section.context p {
    padding-bottom: 15px;
    text-align: justify;
}
.section.look-back {
    overflow: hidden;
    display: flex;
}
.section.look-back .left {
    width: 50%;
}

.section.thank {
    background-color: #5b4eb4;
    color: #FFF;
    padding: 30px 50px;
    box-sizing: border-box;
    text-align: justify;
}
.div-thank {
    width: 50%;
    float: right;
    text-align: right;
}
.top {
    position: relative;
}
#lang {
    position: absolute;
    top: 15px;
    left: 15px;
    z-index: 2;
    font-size: 16px;
    color: #fff;
    background: #5b4eb4;
    padding: 5px 10px;
    border-radius: 5px;
    text-decoration: none;

}

.image-container {
    overflow: hidden;           /* cắt phần ảnh tràn ra */
    position: relative;
}

.image-container img {
    object-fit: cover;          /* ảnh tự co để vừa khung */
    transition: transform 3s ease; /* hiệu ứng mượt */
}

.image-container img:hover {
    transform: scale(1.2);      /* phóng to ảnh khi hover */
}
.icon-list{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.icon-item {
    width: 22%;
    margin-bottom: 15px;
    text-align: center;
    position: relative;
}
.vn .container-chart {
    background: url("../images/chart_bg.png") no-repeat top left;
    background-size: 0;
}
.en .container-chart {
    background: url("../images/chart_bg_en.png") no-repeat top left;
    background-size: 0;
}
.container-chart {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    min-height: 50vh;
    background-size: 0;
    transition: background-size 0.3s ease-out;
}

.column-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 19.5%;
}

.year-label {
    font-weight: bold;
    margin-bottom: 8px;
    text-align: center;
    color: #5c50c9;
    font-size: 3.5vw;
    text-transform: uppercase;
}
.products img:hover {
    cursor: pointer;
}
.icon-item {
    border-radius: 20px;
}

.column {
    width: 100%;
    background-color: #5c50c9;
    color: white;
    position: relative;
    height: 0; /* Bắt đầu từ 0 */
    opacity: 0;
    transition: opacity 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    border-radius: 4px;
    padding: 5px;
    overflow: hidden;
}

.column span {
    font-weight: bold;
    text-align: center;
    line-height: 1.2;
    font-size: 2vw;
    text-transform: uppercase;
}
.rotate-label span {
    font-size: 4vw;
    transform: rotate(-90deg);
    white-space: nowrap;
    display: inline-block;
}
.rotate-label.last span {
    font-size: 9vw;
}

.column.show {
    opacity: 1;
}

@media (min-width: 480px) {
}
@media only screen and (min-width: 1921px) {
    .column span {
        font-size: 30px;
    }
    .rotate-label.last span {
        font-size: 120px;
    }
    .rotate-label span {
        font-size: 50px;
    }
    .year-label {
        font-size: 50px;
    }
}

@media only screen and (max-width: 767px) {
    #lang {
        top: 5px;
        left: 5px;

    }
    .logo {
        margin-top: 0;
    }
    .boss .left {
        width: 100%;
        padding-right: 0;
        float: none;
    }
    .boss .right {
        width: 100%;
        float: none;
    }
    .video iframe {
        height: 300px;
    }
    .section.look-back {
        display: block;
        margin-bottom: 15px;
    }
    .section.look-back .left {
        width: 100%;
        padding-right: 0;
        float: none;
    }
    .section.look-back .right {
        width: 100%;
        float: none;
        background: #5b4eb4;
    }
    .icon-list div {
        width: 48%;
    }
    .section.context, .section.thank {
        padding: 15px;
    }
    .div-thank {
        width: 100%;
        float: none;
    }
    .margin {
        margin-bottom: 10px;
    }
    h2 {
        padding: 20px 0;
        font-size: 16px;
    }
}
@media (min-width: 1200px) {

}