.seo-landing {
    width: min(1200px, calc(100% - 32px));
    margin: 32px auto 72px;
    display: grid;
    gap: 28px;
    min-width: 0;
    container-type: inline-size;
}

.seo-landing > *,
.seo-landing__hero,
.seo-landing__hero-copy,
.seo-landing__hero-card,
.seo-landing__section,
.seo-landing__split,
.seo-landing__aside,
.seo-landing__metric-grid,
.seo-landing__card-grid,
.seo-landing__related-grid,
.seo-landing__article-grid {
    min-width: 0;
}

.seo-landing__breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    color: #64748b;
    font-size: 0.95rem;
}

.seo-landing__breadcrumb a {
    color: #0f172a;
    font-weight: 600;
    text-decoration: none;
}

.seo-landing__breadcrumb a:hover {
    text-decoration: underline;
}

.seo-landing__hero,
.seo-landing__section,
.seo-landing__aside,
.seo-landing__card,
.seo-landing__mini-card,
.seo-landing__hero-card,
.seo-landing__faq details {
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.06);
}

.seo-landing__hero,
.seo-landing__section {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(248, 250, 252, 0.96) 100%);
    border-radius: 28px;
}

.seo-landing__hero {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.7fr);
    gap: 24px;
    padding: 32px;
}

.seo-landing__hero--aptis {
    background:
        radial-gradient(circle at top right, rgba(249, 115, 22, 0.18), transparent 28%),
        linear-gradient(180deg, #fff7ed 0%, #ffffff 100%);
}

.seo-landing__hero--vstep {
    background:
        radial-gradient(circle at top right, rgba(14, 165, 233, 0.18), transparent 28%),
        linear-gradient(180deg, #eff6ff 0%, #ffffff 100%);
}

.seo-landing__hero--toeic {
    background:
        radial-gradient(circle at top right, rgba(34, 197, 94, 0.18), transparent 28%),
        linear-gradient(180deg, #f0fdf4 0%, #ffffff 100%);
}

.seo-landing__hero-copy h1,
.seo-landing__section-head h2,
.seo-landing__aside h3,
.seo-landing__hero-card h2 {
    margin: 0;
    color: #0f172a;
    line-height: 1.1;
}

.seo-landing__hero-copy h1 {
    font-size: clamp(2rem, 3.4vw, 3.6rem);
    margin-top: 10px;
}

.seo-landing__hero-copy p,
.seo-landing__section-head p,
.seo-landing__card p,
.seo-landing__mini-card p,
.seo-landing__aside p,
.seo-landing__hero-card li,
.seo-landing__faq p,
.seo-landing__checklist div {
    color: #475569;
    line-height: 1.75;
}

.seo-landing__eyebrow,
.seo-landing__section-tag,
.seo-landing__badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    border-radius: 999px;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.seo-landing__eyebrow,
.seo-landing__badge {
    padding: 8px 14px;
    background: rgba(15, 23, 42, 0.08);
    color: #0f172a;
    text-transform: uppercase;
    font-size: 0.78rem;
}

.seo-landing__section-tag {
    padding: 7px 12px;
    background: #e2e8f0;
    color: #0f172a;
    font-size: 0.8rem;
    margin-bottom: 10px;
}

.seo-landing__cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 24px 0 28px;
}

.seo-landing__link-cluster {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.seo-landing__chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 40px;
    padding: 0 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.12);
    color: #0f172a;
    font-weight: 600;
    text-decoration: none;
}

.seo-landing__chip:hover {
    background: #ffffff;
    box-shadow: 0 10px 20px rgba(15, 23, 42, 0.08);
}

.seo-landing__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 20px;
    border-radius: 999px;
    font-weight: 700;
    text-decoration: none;
    transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.seo-landing__btn:hover {
    transform: translateY(-1px);
}

.seo-landing__btn--primary {
    background: #0f172a;
    color: #fff;
}

.seo-landing__btn--ghost {
    background: #fff;
    color: #0f172a;
    border: 1px solid rgba(15, 23, 42, 0.14);
}

.seo-landing__metric-grid,
.seo-landing__card-grid,
.seo-landing__stack {
    display: grid;
    gap: 16px;
}

.seo-landing__metric-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.seo-landing__metric-grid article,
.seo-landing__card,
.seo-landing__mini-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 22px;
    padding: 18px 18px 20px;
}

.seo-landing__metric-grid strong,
.seo-landing__card h3,
.seo-landing__mini-card h3 {
    display: block;
    color: #0f172a;
}

.seo-landing__metric-grid span {
    display: block;
    margin-top: 6px;
    color: #475569;
    line-height: 1.5;
}

.seo-landing__hero-card {
    background: rgba(255, 255, 255, 0.92);
    border-radius: 24px;
    padding: 22px;
    align-self: start;
}

.seo-landing__hero-card ul {
    margin: 16px 0 0;
    padding-left: 18px;
}

.seo-landing__hero-visual {
    width: 100%;
    margin-top: 24px;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.seo-landing__hero-visual img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.seo-landing__section {
    padding: 28px;
}

.seo-landing__section-head {
    margin-bottom: 18px;
}

.seo-landing__section-head p:last-child {
    margin-bottom: 0;
}

.seo-landing__card-grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.seo-landing__section--soft {
    background: linear-gradient(180deg, rgba(248, 250, 252, 1) 0%, rgba(241, 245, 249, 0.95) 100%);
}

.seo-landing__split {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
    gap: 20px;
}

.seo-landing__aside {
    background: #fff;
    border-radius: 24px;
    padding: 22px;
}

.seo-landing__checklist {
    display: grid;
    gap: 12px;
    margin-top: 18px;
}

.seo-landing__checklist div {
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.84);
}

.seo-landing__faq {
    display: grid;
    gap: 12px;
}

.seo-landing__faq details {
    background: #fff;
    border-radius: 18px;
    padding: 18px 20px;
}

.seo-landing__faq summary {
    cursor: pointer;
    font-weight: 700;
    color: #0f172a;
}

.seo-landing__faq p {
    margin: 12px 0 0;
}

.seo-article-prose {
    display: grid;
    gap: 14px;
}

.seo-article-prose p {
    margin: 0;
    color: #475569;
    line-height: 1.82;
}

.seo-landing__related-grid,
.seo-landing__article-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.seo-landing__related-card {
    display: grid;
    gap: 12px;
    background: rgba(255, 255, 255, 0.94);
    border-radius: 22px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.06);
    padding: 20px;
}

.seo-landing__related-card h3,
.seo-landing__article-grid h3 {
    margin: 0;
    color: #0f172a;
}

.seo-landing__related-card p,
.seo-landing__article-grid p {
    margin: 0;
    color: #475569;
    line-height: 1.7;
}

.seo-landing__text-link {
    color: #0f172a;
    font-weight: 700;
    text-decoration: none;
}

.seo-landing__text-link:hover {
    text-decoration: underline;
}

.seo-landing__article-grid article {
    display: grid;
    gap: 12px;
    background: rgba(255, 255, 255, 0.94);
    border-radius: 22px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.06);
    padding: 20px;
}

.seo-landing__article-meta {
    color: #64748b;
    font-size: 0.92rem;
    font-weight: 600;
}

.seo-landing__cta-stack {
    display: grid;
    gap: 12px;
}

.seo-landing__cta-stack .seo-landing__btn {
    justify-content: flex-start;
}

@media (max-width: 980px) {
    .seo-landing {
        width: min(100% - 20px, 820px);
        margin-top: 20px;
    }

    .seo-landing__hero,
    .seo-landing__split,
    .seo-landing__card-grid--3,
    .seo-landing__metric-grid,
    .seo-landing__related-grid,
    .seo-landing__article-grid {
        grid-template-columns: 1fr;
    }

    .seo-landing__hero,
    .seo-landing__section {
        padding: 22px;
    }
}

@media (min-width: 1280px) and (max-width: 1439px) {
    .seo-landing {
        width: min(100%, var(--content-shell-wide-max));
        margin: 24px auto calc(var(--section-gap) * 2 + 18px);
        gap: var(--section-gap);
    }

    .seo-landing__hero,
    .seo-landing__section,
    .seo-landing__hero-card,
    .seo-landing__aside {
        padding: var(--card-padding);
    }

    .seo-landing__metric-grid,
    .seo-landing__card-grid,
    .seo-landing__related-grid,
    .seo-landing__article-grid,
    .seo-landing__split {
        gap: var(--section-gap);
    }
}

@media (min-width: 1024px) and (max-width: 1279px) {
    .seo-landing {
        width: min(100%, var(--content-shell-max));
        margin: 20px auto calc(var(--section-gap) * 2 + 10px);
        gap: max(18px, calc(var(--section-gap) - 2px));
    }

    .seo-landing__hero,
    .seo-landing__section,
    .seo-landing__hero-card,
    .seo-landing__aside {
        padding: var(--card-padding);
    }

    .seo-landing__metric-grid,
    .seo-landing__card-grid,
    .seo-landing__related-grid,
    .seo-landing__article-grid,
    .seo-landing__split {
        gap: max(16px, calc(var(--section-gap) - 4px));
    }
}