html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
}

/* 头部导航 */
.nav-container {
    padding: 0 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 80px;
    background: #FFFFFF;
    box-shadow: 0px 2px 11px 1px rgba(153, 153, 153, 0.1);
}

.nav-bar {
    display: flex;
    align-items: center;
    width: 100%;
}

.nav-logo-div {
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.nav-title{
    font-size: 28px;
}

.nav-logo {
    width: 60px;
    height: 60px;
}

.nav-ul {
    flex: 1;
    margin-left: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-li {
    font-size: 20px;
    color: #333;
    cursor: pointer;
    text-decoration: none;
}

.nav-li.active {
    font-weight: bold;
    color: #0A71E4;
    position: relative;
}

.nav-li.active::after {
    position: absolute;
    content: '';
    bottom: -9px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #0A71E4;
}

.nav-button {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 80px;
    width: 120px;
    height: 40px;
    background: #fff;
    border-radius: 2px;
    border: 1px solid #0A71E4;
    font-size: 16px;
    color: #0A71E4;
    cursor: pointer;
}

.nav-button:hover {
    background-color: #ecf5ff;
}