.devsource-seo-block {
    clear: both;
    margin: 0;
    padding: 3rem 2rem;
    background: #f0f3f1;
    border-top: 3px solid #f1fd0d;
    font-family: 'Inter', system-ui, sans-serif;
    color: #1a3638;
    width: 100%;
    box-sizing: border-box;
}

.devsource-seo-block *,
.devsource-seo-block *::before,
.devsource-seo-block *::after {
    box-sizing: border-box;
}

.devsource-seo-inner {
    max-width: 1140px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.devsource-seo-toc {
    padding: 1.4rem 1.6rem;
    background: #283a3b;
    border-radius: 6px;
}

.devsource-seo-toc-title,
.devsource-seo-desc-title {
    font-family: 'DM Sans', system-ui, sans-serif;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 0 0 0.8rem;
    padding: 0 0 0.5rem;
    line-height: 1.3;
}

.devsource-seo-toc-title {
    color: #f1fd0d;
    border-bottom: 1px solid rgba(241, 253, 13, 0.25);
}

.devsource-seo-desc-title {
    color: #283a3b;
    border-bottom: 2px solid #f1fd0d;
}

.devsource-seo-toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    column-count: 2;
    column-gap: 2rem;
}

.devsource-seo-toc-list li {
    margin: 0;
    padding: 0;
    break-inside: avoid;
}

.devsource-seo-toc-list li a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.84rem;
    line-height: 1.4;
    display: block;
    padding: 0.35rem 0;
    transition: color 0.15s, padding-left 0.15s;
    border: none;
    background: none;
}

.devsource-seo-toc-list li a:hover,
.devsource-seo-toc-list li a:focus {
    color: #f1fd0d;
    padding-left: 6px;
    text-decoration: none;
}

.devsource-seo-toc-level-1 a {
    font-weight: 700;
    color: #fff;
    font-size: 0.88rem;
}

.devsource-seo-toc-level-2 {
    padding-left: 0.8rem;
}

.devsource-seo-toc-level-3 {
    padding-left: 1.5rem;
}

.devsource-seo-toc-level-3 a {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
}

.devsource-seo-description {
    padding: 1.5rem 1.8rem;
    background: #fff;
    border-radius: 6px;
    border-left: 3px solid #f1fd0d;
}

.devsource-seo-desc-content {
    font-size: 0.93rem;
    line-height: 1.8;
    color: #283a3b;
}

.devsource-seo-desc-content p {
    margin: 0 0 0.8rem;
}

.devsource-seo-desc-content p:last-child {
    margin-bottom: 0;
}

.devsource-seo-signature {
    margin-top: 1rem;
    font-size: 0.72rem;
    color: #1a3638;
    opacity: 0.45;
    font-family: ui-monospace, 'SFMono-Regular', monospace;
}

@media (max-width: 768px) {
    .devsource-seo-block {
        padding: 2rem 1rem;
    }

    .devsource-seo-toc-list {
        column-count: 1;
    }
}