header {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100px;
}

header .logo img {
    width: 206px;
    display: block;
}

header ul {
    display: flex;
    align-items: center;
}

header ul li {
    margin-left: 58px;
}

header ul li a {
    font-size: 18px;
    font-weight: 400;
    color: rgba(102, 102, 102, 1);
}

header ul li.active a {
    position: relative;
    color: rgba(51, 51, 51, 1);
}

header ul li.active a::after {
    content: '';
    display: block;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: -10px;
    width: 24px;
    height: 4px;
    border-radius: 2px;
    background: rgba(1, 83, 181, 1);
}

header .search {
    margin-left: 60px;
    width: 26px;
    height: 26px;
    display: block;
    cursor: pointer;
}

header .btn {
    width: 98px;
    height: 40px;
    border-radius: 6px;
    background: rgba(1, 83, 181, 1);
    font-size: 18px;
    font-weight: 400;
    line-height: 40px;
    color: rgba(255, 255, 255, 1);
    text-align: center;
    margin-left: 48px;
    cursor: pointer;
}

footer {
    height: 433px;
    background: url('../static/20.png') no-repeat center;
    background-size: 100% 100%;
}

footer .content {
    width: 1200px;
    margin: auto;
    padding-top: 50px;
}

footer .h1 {
    font-size: 26px;
    font-weight: 400;
    line-height: 36.4px;
    color: #fff;
    opacity: 0.97;
    margin-bottom: 40px;
}

footer li {
    font-size: 20px;
    font-weight: 300;
    line-height: 28px;
    color: #fff;
    opacity: 0.97;
    margin-bottom: 24px;
}

footer .copyright {
    height: 94px;
    border-top: 1.3px solid rgba(255, 255, 255, 0.2);
    font-size: 18px;
    font-weight: 300;
    line-height: 94px;
    text-align: center;
}

footer .copyright a {
    color: rgba(255, 255, 255, 0.97);
}