.seo-article {
    color: #374151;
    font-size: 1.05rem;
    line-height: 1.85;
}

.seo-article h2 {
    margin-top: 3rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #e5e7eb;
    color: #111827;
    font-size: 1.75rem;
    font-weight: 700;
}

.seo-article h3 {
    margin-top: 1.75rem;
    margin-bottom: 0.75rem;
    color: #1f2937;
    font-size: 1.3rem;
    font-weight: 700;
}

.seo-article p,
.seo-article ul,
.seo-article ol {
    margin-bottom: 1.25rem;
}

.seo-article ul,
.seo-article ol {
    padding-left: 1.5rem;
}

.seo-article ul {
    list-style: disc;
}

.seo-article ol {
    list-style: decimal;
}

.seo-article li {
    margin-bottom: 0.6rem;
}

.seo-article a {
    color: #2563eb;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.seo-summary,
.seo-recommend,
.seo-note {
    margin: 1.75rem 0;
    padding: 1.4rem;
    border-radius: 0.75rem;
}

.seo-summary {
    border-left: 4px solid #2563eb;
    background: #eff6ff;
}

.seo-recommend {
    border: 1px solid #bfdbfe;
    background: #fff;
}

.seo-note {
    border: 1px solid #e5e7eb;
    background: #f9fafb;
    color: #4b5563;
}

.seo-table-wrap {
    margin: 1.5rem 0 2rem;
    overflow-x: auto;
    border: 1px solid #e5e7eb;
    border-radius: 0.75rem;
}

.seo-table {
    width: 100%;
    min-width: 680px;
    border-collapse: collapse;
    background: #fff;
}

.seo-table th,
.seo-table td {
    padding: 0.9rem 1rem;
    border-bottom: 1px solid #e5e7eb;
    text-align: left;
    vertical-align: top;
}

.seo-table th {
    background: #f3f4f6;
    color: #111827;
    font-weight: 700;
}

.seo-table tr:last-child td {
    border-bottom: 0;
}

.seo-faq details {
    margin-bottom: 1rem;
    padding: 1.2rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.75rem;
    background: #f9fafb;
}

.seo-faq summary {
    cursor: pointer;
    color: #111827;
    font-weight: 700;
}

.seo-faq details p {
    margin-top: 0.8rem;
    margin-bottom: 0;
}

.seo-cta {
    margin-top: 3rem;
    padding: 2rem;
    border-radius: 1rem;
    background: #eff6ff;
    text-align: center;
}

.seo-cta h2 {
    margin-top: 0;
    border: 0;
    padding: 0;
}

.seo-cta a {
    display: inline-block;
    border-radius: 0.5rem;
    background: #2563eb;
    padding: 0.75rem 1.25rem;
    color: #fff;
    font-weight: 700;
    text-decoration: none;
}

.seo-toc a {
    display: block;
    padding: 0.42rem 0;
    color: #4b5563;
    font-size: 0.9rem;
}

.seo-toc a:hover {
    color: #2563eb;
}

@media (max-width: 640px) {
    .seo-article {
        font-size: 1rem;
        line-height: 1.75;
    }

    .seo-article h2 {
        font-size: 1.5rem;
    }
}