.seo-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, .96);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(10px);
}
.seo-header .container {
    min-height: 72px;
    display: flex;
    align-items: center;
    gap: 28px;
}
.seo-nav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 20px;
}
.seo-nav a {
    color: var(--navy-600);
    font-size: 15px;
    font-weight: 600;
}
.seo-nav a:hover,
.seo-nav a[aria-current="page"] {
    color: var(--teal-600);
}
.seo-lang {
    padding: 6px 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
}
.content-hero {
    padding: 88px 0 72px;
    background:
        radial-gradient(700px 400px at 90% 10%, rgba(45, 181, 214, .12), transparent 70%),
        linear-gradient(180deg, #fff, #f6f9fc);
}
.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-bottom: 24px;
    font-size: 14px;
    color: var(--slate-500);
}
.breadcrumbs a { color: var(--teal-600); }
.content-hero h1 {
    max-width: 900px;
    font-size: clamp(38px, 5vw, 60px);
}
.content-hero .lead {
    max-width: 800px;
    margin-top: 24px;
    font-size: 20px;
}
.content-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 64px;
    align-items: start;
}
.article {
    min-width: 0;
}
.article section + section {
    margin-top: 56px;
}
.article h2 {
    margin-bottom: 18px;
    font-size: clamp(28px, 3vw, 38px);
}
.article h3 {
    margin: 28px 0 10px;
    font-size: 21px;
}
.article p + p {
    margin-top: 16px;
}
.article ul {
    display: grid;
    gap: 12px;
    margin-top: 20px;
}
.article li {
    position: relative;
    padding-left: 28px;
}
.article li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--green-600);
    font-weight: 800;
}
.side-card {
    position: sticky;
    top: 96px;
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--surface-alt);
}
.side-card h2 {
    margin-bottom: 12px;
    font-size: 22px;
}
.side-card p {
    font-size: 15px;
}
.side-card .btn {
    width: 100%;
    margin-top: 20px;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}
.related-card {
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
}
.related-card h3 {
    margin: 0 0 8px;
    font-size: 18px;
}
.related-card p {
    font-size: 15px;
    color: var(--slate-500);
}
.related-card a {
    display: inline-block;
    margin-top: 14px;
    font-weight: 700;
}
.integration-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}
.integration-card {
    display: grid;
    grid-template-columns: 92px 1fr;
    gap: 20px;
    align-items: center;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
}
.integration-card img {
    max-height: 46px;
    margin: auto;
}
.integration-card h2 {
    margin: 0 0 8px;
    font-size: 21px;
}
.integration-card p {
    font-size: 15px;
}
.faq-list {
    border-top: 1px solid var(--line);
}
.faq-list details {
    border-bottom: 1px solid var(--line);
}
.faq-list summary {
    padding: 20px 0;
    cursor: pointer;
    color: var(--navy-800);
    font-weight: 700;
}
.faq-list details p {
    padding: 0 0 20px;
}
.content-cta {
    margin-top: 72px;
    padding: 48px;
    border-radius: var(--radius-lg);
    background: var(--navy-800);
    color: #dbe5f2;
}
.content-cta h2 { color: #fff; }
.content-cta .btn { margin-top: 24px; }
.seo-footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
    margin-top: 24px;
}
@media (max-width: 900px) {
    .seo-header .container { flex-wrap: wrap; padding-top: 14px; padding-bottom: 14px; }
    .seo-nav { width: 100%; margin: 0; overflow-x: auto; }
    .content-layout { grid-template-columns: 1fr; }
    .side-card { position: static; }
    .related-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
    .content-hero { padding: 56px 0; }
    .related-grid, .integration-grid { grid-template-columns: 1fr; }
    .integration-card { grid-template-columns: 70px 1fr; }
    .content-cta { padding: 32px 24px; }
}