.product-platform-menu {
    position: relative;
}

.product-platform-menu::after {
    position: absolute;
    top: 100%;
    right: -1rem;
    left: -1rem;
    height: 1rem;
    content: "";
}

.product-platform-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    white-space: nowrap;
}

.product-platform-trigger svg {
    width: 0.9rem;
    height: 0.9rem;
    transition: transform 180ms ease;
}

.product-platform-dropdown {
    position: absolute;
    top: calc(100% + 0.9rem);
    left: 50%;
    z-index: 70;
    width: 22rem;
    padding: 0.55rem;
    border: 1px solid rgba(148, 190, 211, 0.38);
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 18px 48px rgba(41, 78, 99, 0.16);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translate(-50%, -0.45rem);
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
}

.product-platform-dropdown::before {
    position: absolute;
    top: -0.42rem;
    left: 50%;
    width: 0.8rem;
    height: 0.8rem;
    border-top: 1px solid rgba(148, 190, 211, 0.38);
    border-left: 1px solid rgba(148, 190, 211, 0.38);
    background: #fff;
    content: "";
    transform: translateX(-50%) rotate(45deg);
}

.product-platform-menu:hover .product-platform-dropdown,
.product-platform-menu:focus-within .product-platform-dropdown,
.product-platform-menu.is-open .product-platform-dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translate(-50%, 0);
}

.product-platform-menu:hover .product-platform-trigger svg,
.product-platform-menu:focus-within .product-platform-trigger svg,
.product-platform-menu.is-open .product-platform-trigger svg {
    transform: rotate(180deg);
}

.product-platform-item {
    position: relative;
    display: block;
    padding: 0.9rem 1rem;
    border-radius: 0.75rem;
    color: #34495a;
    transition: background-color 180ms ease, color 180ms ease;
}

.product-platform-item:hover,
.product-platform-item:focus-visible {
    background: #eef8fb;
    color: #126f8c;
    outline: none;
}

.product-platform-item + .product-platform-item {
    margin-top: 0.25rem;
}

.product-platform-item-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    font-size: 0.95rem;
    font-weight: 700;
}

.product-platform-item-copy {
    display: block;
    margin-top: 0.28rem;
    color: #6b7f8d;
    font-size: 0.76rem;
    line-height: 1.55;
}

.product-platform-item:hover .product-platform-item-copy,
.product-platform-item:focus-visible .product-platform-item-copy {
    color: #4f7180;
}

.product-platform-mobile {
    display: block;
}

.product-platform-mobile-trigger {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: space-between;
    color: #334155;
    font-size: 1.125rem;
    line-height: 1.75rem;
    text-align: left;
    transition: color 180ms ease;
}

.product-platform-mobile-trigger:hover {
    color: #137894;
}

.product-platform-mobile-trigger svg {
    width: 1rem;
    height: 1rem;
    transition: transform 180ms ease;
}

.product-platform-mobile-links {
    display: none;
    gap: 0.15rem;
    margin-top: 0.75rem;
    padding: 0.45rem;
    border: 1px solid #dcecf1;
    border-radius: 0.8rem;
    background: #f5fafc;
}

.product-platform-mobile.is-open .product-platform-mobile-links {
    display: grid;
}

.product-platform-mobile.is-open .product-platform-mobile-trigger svg {
    transform: rotate(180deg);
}

.product-platform-mobile-links a {
    display: block;
    padding: 0.7rem 0.8rem;
    border-radius: 0.55rem;
    color: #334155;
    font-size: 0.95rem;
    line-height: 1.4;
}

.product-platform-mobile-links a:hover {
    background: #e7f4f8;
    color: #137894;
}

.site-notice .container > .flex,
.home-announcement .container > .flex {
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
}

@media (max-width: 640px) {
    .site-notice,
    .home-announcement {
        padding-top: 0.7rem;
        padding-bottom: 0.7rem;
    }

    .site-notice .container > .flex,
    .home-announcement .container > .flex {
        row-gap: 0.55rem;
    }
}