:root {
    --brand: #3159ad;
    --brand-deep: #17346f;
    --ink: #132541;
    --muted: #66758d;
    --line: #dce5f2;
    --surface: #ffffff;
    --page: #f3f6fb;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--page);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
        "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.7;
}

a {
    color: inherit;
}

.seo-topbar {
    min-height: 70px;
    padding: 10px clamp(18px, 4vw, 64px);
    display: flex;
    align-items: center;
    gap: 28px;
    color: #fff;
    background: linear-gradient(110deg, var(--brand-deep), var(--brand));
}

.seo-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 21px;
    font-weight: 760;
    text-decoration: none;
}

.seo-brand img {
    width: 46px;
    height: 46px;
    object-fit: contain;
    background: #fff;
    border-radius: 50%;
}

.seo-topbar nav {
    margin-left: auto;
    display: flex;
    gap: 24px;
}

.seo-topbar nav a,
.seo-language {
    font-weight: 650;
    text-decoration: none;
}

.seo-language {
    padding: 7px 14px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 999px;
}

.seo-shell {
    width: min(1040px, calc(100% - 32px));
    margin: 44px auto 72px;
}

.seo-breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin: 0 4px 16px;
    color: var(--muted);
    font-size: 14px;
}

.seo-breadcrumbs a {
    color: var(--brand);
    text-decoration: none;
}

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

.seo-breadcrumb-separator {
    color: #9aa8bb;
}

.seo-card,
.seo-disclaimer {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: 0 16px 48px rgba(32, 61, 111, 0.08);
}

.seo-card {
    padding: clamp(26px, 5vw, 58px);
}

.seo-eyebrow {
    margin: 0 0 10px;
    color: var(--brand);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.14em;
}

h1 {
    max-width: 900px;
    margin: 0;
    font-size: clamp(30px, 4vw, 50px);
    line-height: 1.2;
    letter-spacing: -0.025em;
}

.seo-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 24px;
    margin-top: 24px;
    padding-bottom: 26px;
    color: var(--muted);
    border-bottom: 1px solid var(--line);
}

.seo-summary {
    max-width: 840px;
    margin-top: 34px;
    font-size: 17px;
}

.seo-entity-links {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 22px;
}

.seo-entity-links a {
    padding: 6px 12px;
    color: var(--brand-deep);
    background: #eef4ff;
    border: 1px solid #d5e3ff;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}

.seo-summary h2 {
    margin: 0 0 16px;
    font-size: 24px;
}

.seo-summary p {
    margin: 0 0 16px;
    white-space: pre-wrap;
}

.seo-empty {
    color: var(--muted);
}

.seo-note {
    max-width: 840px;
    margin: 28px 0 0;
    padding: 14px 18px;
    color: var(--muted);
    background: #f5f8fd;
    border-left: 3px solid #7ba0ea;
    border-radius: 4px 10px 10px 4px;
}

.seo-cta {
    display: inline-flex;
    margin-top: 28px;
    padding: 12px 22px;
    color: #fff;
    background: var(--brand);
    border-radius: 9px;
    font-weight: 750;
    text-decoration: none;
}

.seo-cta:hover {
    background: var(--brand-deep);
}

.seo-related {
    margin-top: 42px;
    padding-top: 32px;
    border-top: 1px solid var(--line);
}

.seo-related h2 {
    margin: 0 0 18px;
    font-size: 24px;
}

.seo-related-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.seo-related-card {
    display: flex;
    min-width: 0;
    flex-direction: column;
    gap: 7px;
    padding: 16px 18px;
    background: #f8faff;
    border: 1px solid var(--line);
    border-radius: 12px;
    text-decoration: none;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.seo-related-card:hover {
    border-color: #8eabe5;
    transform: translateY(-1px);
}

.seo-related-card strong {
    display: -webkit-box;
    overflow: hidden;
    line-height: 1.45;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.seo-related-card span {
    color: var(--muted);
    font-size: 13px;
}

.seo-collection-intro {
    max-width: 780px;
    margin: 20px 0 30px;
    color: var(--muted);
    font-size: 17px;
}

.seo-collection-grid {
    grid-template-columns: 1fr;
}

.seo-collection-card {
    background: #fff;
}

.seo-disclaimer {
    margin-top: 20px;
    padding: 22px 26px;
    color: var(--muted);
    box-shadow: none;
}

.seo-disclaimer strong {
    color: var(--ink);
}

.seo-disclaimer p {
    margin: 7px 0 0;
}

@media (max-width: 720px) {
    .seo-topbar {
        gap: 14px;
    }

    .seo-topbar nav {
        display: none;
    }

    .seo-language {
        margin-left: auto;
    }

    .seo-shell {
        margin-top: 22px;
    }

    .seo-card {
        border-radius: 14px;
    }

    .seo-meta {
        display: grid;
        gap: 7px;
    }

    .seo-related-grid {
        grid-template-columns: 1fr;
    }
}