/* 桌面四列写在 CSS 里，避免 Tailwind 任意值类未进构建导致整页脚变单列拉长 */
footer .footer-main-grid {
    display: grid;
    gap: 2rem 1.5rem;
}

@media (min-width: 1024px) {
    footer .footer-main-grid {
        grid-template-columns: 1.25fr 1.1fr 0.85fr 1fr;
        align-items: start;
        gap: 2.5rem 1.75rem;
    }
}

footer .footer-nav-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 1rem;
    row-gap: .5rem;
}

footer .footer-legal a + a {
    position: relative;
}

footer .footer-legal a + a::before {
    content: "";
    position: absolute;
    left: -.7rem;
    top: 50%;
    width: 3px;
    height: 3px;
    border-radius: 999px;
    background: rgba(148, 163, 184, .55);
    transform: translateY(-50%);
}

@media (max-width: 1023px) {
    footer .footer-main-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1.75rem 1.25rem;
    }

    footer .footer-main-grid > section:first-child,
    footer .footer-main-grid > section:last-child {
        grid-column: 1 / -1;
    }

    footer .footer-main-grid > section:first-child p {
        max-width: none;
    }

    footer .footer-main-grid nav:not(.footer-nav-grid) {
        gap: .625rem;
    }

    footer .footer-main-grid > section:last-child > div {
        display: grid;
        gap: .75rem;
    }
}

@media (min-width: 640px) and (max-width: 1023px) {
    footer .footer-main-grid > section:last-child > div {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        column-gap: 1rem;
    }

    footer .footer-main-grid > section:last-child > div > p:nth-child(3),
    footer .footer-main-grid > section:last-child > div > p:nth-child(5) {
        grid-column: 1 / -1;
    }
}

@media (max-width: 639px) {
    footer .footer-main-grid > section:last-child > div {
        grid-template-columns: 1fr;
    }
}

footer .footer-main-grid h2 {
    display: flex;
    align-items: center;
    gap: .5rem;
    letter-spacing: .02em;
}

footer .footer-main-grid h2::before {
    content: "";
    width: 3px;
    height: 14px;
    border-radius: 999px;
    background: linear-gradient(180deg, #6a8bff, #8b5cf6);
    flex: 0 0 auto;
}

footer .footer-main-grid nav a,
footer .footer-main-grid > section:last-child a {
    display: inline-flex;
    align-items: center;
    min-height: 1.5rem;
    transition: color .18s ease, transform .18s ease;
}

footer .footer-main-grid nav a:hover {
    transform: translateX(2px);
}

footer .footer-main-grid > section:first-child .flex.flex-wrap {
    gap: .625rem;
}