:root {
    --aei-deep: #2a263f;
    --logo-yellow: #e9f45b;
}

.wrap {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 20px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--aei-deep);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.site-header .wrap {
    max-width: 1320px;
}

.site-header-inner {
    min-height: 135px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.site-header .brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.site-header .brand img {
    height: 52px;
    width: auto;
    display: block;
}

.site-header .brand-sub {
    color: rgba(255, 255, 255, 0.68);
    font-size: 13px;
    margin-top: 4px;
}

.site-header .top-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.site-header .nav-link {
    display: inline-block;
    border: 1px solid var(--logo-yellow);
    border-radius: 999px;
    padding: 6px 12px;
    color: var(--aei-deep);
    font-size: 12px;
    font-weight: 600;
    background: var(--logo-yellow);
    text-decoration: none;
    transition: border-color 0.15s ease, background 0.15s ease, transform 0.18s ease;
}

.site-header .nav-link:hover {
    border-color: #f3ff7a;
    background: #f3ff7a;
    color: var(--aei-deep);
    transform: scale(1.04) translateY(-1px);
}

@media (max-width: 980px) {
    .site-header-inner {
        min-height: 92px;
    }

    .site-header .top-nav {
        display: none;
    }
}

@media (max-width: 760px) {
    .site-header-inner {
        min-height: 68px;
    }
}