.site-footer {
    width: 100%;
    color: #c4c4c4;
    background: #1d1b1b;
    border-top: 5px solid #1d1b1b;
    font-family: var(--font-sans);
}

.footer-container {
    width: min(80%, 1200px);
    min-height: 290px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    padding: 48px 0;
}

.footer-main,
.footer-info {
    display: flex;
    flex-direction: column;
}

.footer-info {
    gap: 8px;
    font-size: 16px;
}

.company-name {
    margin-bottom: 4px;
    font-size: 20px;
    font-weight: 500;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: inherit;
    line-height: 1.35;
    text-decoration: none;
}

.info-item::before {
    width: 18px;
    flex: 0 0 18px;
    color: #fff;
    text-align: center;
    font-family: Arial, sans-serif;
    font-size: 16px;
    font-weight: 700;
}

.info-item.tel::before { content: "☎"; }
.info-item.email::before { content: "✉"; }
.info-item.research::before { content: "●"; font-size: 13px; }
.info-item.office::before { content: "▦"; }

.footer-qrcode {
    display: flex;
    align-items: center;
    gap: 50px;
}

.qrcode-item {
    width: 130px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.qrcode-img {
    display: block;
    width: 130px;
    height: 130px;
    object-fit: cover;
    background: #fff;
}

.qrcode-label {
    width: 130px;
    height: 18px;
    color: #fff;
    background: #2db7a8;
    font-size: 11px;
    line-height: 18px;
    text-align: center;
}

.footer-copyright {
    min-height: 28px;
    padding: 0 12px;
    color: #b8b8b8;
    background: #323232;
    font-size: 14px;
    line-height: 28px;
    text-align: center;
}

.footer-copyright a {
    color: inherit;
    text-decoration: none;
}

.footer-copyright a:hover { text-decoration: underline; }

@media (max-width: 768px) {
    .footer-container {
        width: min(92%, 620px);
        min-height: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 28px;
        padding: 36px 0;
    }

    .footer-info { font-size: 14px; }
    .company-name { font-size: 18px; }
    .footer-qrcode { justify-content: center; gap: 24px; }
    .info-item { align-items: flex-start; }
}

@media (max-width: 420px) {
    .footer-info { font-size: 12px; }
    .footer-qrcode { gap: 16px; }
    .qrcode-item, .qrcode-img, .qrcode-label { width: 112px; }
    .qrcode-img { height: 112px; }
}