main {}

.container {
    margin: 0 auto;
    width: 1200px;
    padding-bottom: 72px;
}

nav {
    background: rgb(248, 249, 252);
    font-size: 16px;
    font-weight: 500;
    color: rgba(51, 51, 51, 1);
    height: 62px;
    line-height: 62px;
}

nav a {
    color: rgba(153, 153, 153, 1);
}

nav .box {
    margin: 0 auto;
    width: 1200px;
}

.tab {
    height: 75px;
    display: flex;
    border-bottom: 1px solid rgba(236, 237, 241, 1);
}

.tab li {
    flex-shrink: 0;
    position: relative;
    margin-right: 36px;
    font-size: 18px;
    font-weight: 400;
    line-height: 75px;
    color: rgba(153, 153, 153, 1);
    cursor: pointer;
}

.tab li.active {
    font-weight: 500;
    color: rgba(1, 83, 181, 1);
}

.tab li.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 64px;
    height: 2px;
    background: rgba(1, 83, 181, 1);
}

.container h1 {
    font-size: 32px;
    font-weight: 500;
    color: rgba(51, 51, 51, 1);
    margin-top: 60px;
    margin-bottom: 24px;
    text-align: center;
}

.container .btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 463px;
    height: 72px;
    background: rgba(1, 83, 181, 1);
    box-shadow: 0px 2px 10px rgba(1, 83, 181, 0.47);
    font-size: 24px;
    font-weight: 500;
    color: rgba(255, 255, 255, 1);
    border-radius: 72px;
    margin: 80px auto 0;
    cursor: pointer;
}

.container .btn img {
    width: 9px;
    height: 17px;
    margin-left: 20px;
}