.site-nav {
    width: 100%;
    width: 100vw !important;
    margin-left: calc(-50vw + 50%);
    background: #2563eb;
    padding: 0;
}
.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    height: 60px;
    gap: 30px;
    padding: 0 20px;
}
.nav-logo {
    flex-shrink: 0;
}
.nav-logo a {
    display: inline-block;
    text-decoration: none;
}
.nav-logo .logo-img {
    height: 42px;
    width: auto;
    vertical-align: middle;
    object-fit: contain;
    background: transparent;
}
.nav-menu {
    display: flex;
    gap: 24px;
}
.nav-menu a {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    font-size: 15px;
    transition: 0.2s;
    padding-bottom: 6px;
}
.nav-menu a:hover,
.nav-menu a.active {
    color: #fff;
    border-bottom: 3px solid #fff;
}
/* 移动端适配 */
@media screen and (max-width:768px) {
    .nav-inner {
        height: auto;
        flex-direction: column;
        padding: 12px 20px;
        gap:12px;
    }
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap:16px;
    }
}