/*
 * Post / Insights styles
 * 复用 brand-system 设计令牌，与 compare 页保持一致的视觉语言
 */

/* ---------- Banner ---------- */
.post-banner {
    background-color: var(--brand-ink-900);
    border-bottom: 3px solid var(--brand-signal-strong);
}

.post-banner__inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: 72px 24px 66px;
}

.post-banner__eyebrow {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0 0 18px;
    color: var(--brand-signal);
    font-family: var(--brand-mono);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .16em;
    text-transform: uppercase;
}

.post-banner__eyebrow::before {
    content: "";
    width: 24px;
    height: 2px;
    background: var(--brand-signal);
}

.post-banner__eyebrow a {
    color: var(--brand-signal);
    text-decoration: none;
}

.post-banner__eyebrow a:hover {
    text-decoration: underline;
}

.post-banner__title {
    max-width: 900px;
    margin: 0;
    color: var(--brand-surface);
    font-size: clamp(32px, 4.6vw, 52px);
    line-height: 1.08;
    letter-spacing: -.02em;
}

.post-banner__desc {
    max-width: 720px;
    margin: 18px 0 0;
    color: var(--brand-line-strong);
    font-size: 17px;
    line-height: 1.65;
}

.post-banner__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin: 24px 0 0;
    color: var(--brand-ink-500);
    font-family: var(--brand-mono);
    font-size: 12px;
    letter-spacing: .04em;
    text-transform: uppercase;
}

/* ---------- Article body ---------- */
.post-body {
    background: var(--brand-paper);
    padding: 64px 24px 40px;
}

.post-body__inner {
    max-width: 820px;
    margin: 0 auto;
}

.post-body__media {
    margin: 0 0 40px;
    border: 1px solid var(--brand-line);
    border-radius: var(--brand-radius-md);
    overflow: hidden;
    box-shadow: var(--brand-shadow-md);
}

.post-body__media img {
    display: block;
    width: 100%;
    height: auto;
}

.post-content {
    color: var(--brand-ink-700);
    font-size: 17px;
    line-height: 1.8;
}

.post-content > *:first-child {
    margin-top: 0;
}

.post-content p {
    margin: 0 0 22px;
}

.post-content h2 {
    margin: 46px 0 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--brand-line);
    color: var(--brand-ink-900);
    font-size: clamp(22px, 2.6vw, 28px);
    line-height: 1.25;
}

.post-content h3 {
    margin: 34px 0 12px;
    color: var(--brand-ink-900);
    font-size: 20px;
    line-height: 1.3;
}

.post-content ul,
.post-content ol {
    margin: 0 0 24px;
    padding-left: 22px;
}

.post-content li {
    margin-bottom: 10px;
}

.post-content li::marker {
    color: var(--brand-signal-deep);
    font-weight: 700;
}

.post-content strong {
    color: var(--brand-ink-900);
}

.post-content blockquote {
    margin: 28px 0;
    padding: 18px 24px;
    border-left: 4px solid var(--brand-signal-strong);
    background: var(--brand-surface-soft);
    color: var(--brand-ink-800);
    font-style: italic;
}

.post-content a {
    color: var(--brand-signal-deep);
    text-decoration: underline;
}

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--brand-radius-sm);
}

/* ---------- Tags & actions ---------- */
.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 40px 0 0;
    padding-top: 28px;
    border-top: 1px solid var(--brand-line);
}

.post-tags__item {
    padding: 7px 14px;
    border: 1px solid var(--brand-line-strong);
    border-radius: 999px;
    background: var(--brand-surface);
    color: var(--brand-ink-700);
    font-family: var(--brand-mono);
    font-size: 12px;
    letter-spacing: .03em;
    text-decoration: none;
    transition: border-color var(--brand-motion), color var(--brand-motion), background var(--brand-motion);
}

.post-tags__item:hover {
    border-color: var(--brand-signal-strong);
    background: var(--brand-surface-soft);
    color: var(--brand-ink-900);
}

.post-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin: 36px 0 0;
}

.post-actions__back {
    color: var(--brand-ink-600);
    font-family: var(--brand-mono);
    font-size: 13px;
    letter-spacing: .03em;
    text-decoration: none;
}

.post-actions__back:hover {
    color: var(--brand-ink-900);
}

.post-actions__cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 13px 20px;
    background: var(--brand-ink-900);
    border: 1px solid var(--brand-ink-900);
    border-radius: var(--brand-radius-sm);
    color: var(--brand-paper);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    text-decoration: none;
    transition: background var(--brand-motion), color var(--brand-motion);
}

.post-actions__cta:hover {
    background: var(--brand-signal);
    border-color: var(--brand-signal-strong);
    color: var(--brand-ink-950);
}

/* ---------- Related / archive cards ---------- */
.post-related {
    background: var(--brand-surface);
    border-top: 1px solid var(--brand-line);
    padding: 64px 24px 88px;
}

.post-related__inner {
    max-width: 1240px;
    margin: 0 auto;
}

.post-related__title {
    margin: 0 0 28px;
    color: var(--brand-ink-900);
    font-size: clamp(22px, 2.6vw, 30px);
}

.post-related__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
}

.post-archive {
    background: var(--brand-paper);
}

.post-archive__body {
    padding: 56px 24px 96px;
}

.post-archive__inner {
    max-width: 1240px;
    margin: 0 auto;
}

.post-archive__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
}

.post-archive__empty {
    margin: 0;
    color: var(--brand-ink-600);
    font-size: 16px;
}

.post-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--brand-surface);
    border: 1px solid var(--brand-line);
    border-radius: var(--brand-radius-md);
    text-decoration: none;
    transition: transform var(--brand-motion), box-shadow var(--brand-motion), border-color var(--brand-motion);
}

.post-card:hover {
    transform: translateY(-4px);
    border-color: var(--brand-line-strong);
    box-shadow: var(--brand-shadow-md);
}

.post-card__media {
    display: block;
    aspect-ratio: 16 / 10;
    background: var(--brand-surface-soft);
    overflow: hidden;
}

.post-card__media img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.post-card__ph {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: var(--brand-ink-500);
    font-family: var(--brand-mono);
    font-size: 13px;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.post-card__body {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 22px 22px 26px;
}

.post-card__meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--brand-mono);
    font-size: 11px;
    letter-spacing: .06em;
    text-transform: uppercase;
}

.post-card__cat {
    color: var(--brand-signal-deep);
    font-weight: 700;
}

.post-card__date {
    color: var(--brand-ink-500);
}

.post-card__title {
    color: var(--brand-ink-900);
    font-size: 19px;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -.01em;
}

.post-card__excerpt {
    color: var(--brand-ink-600);
    font-size: 14px;
    line-height: 1.6;
}

/* ---------- Pagination ---------- */
.post-pagination {
    margin: 48px 0 0;
}

.post-pagination ul {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.post-pagination li a,
.post-pagination li span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 14px;
    border: 1px solid var(--brand-line);
    border-radius: var(--brand-radius-sm);
    background: var(--brand-surface);
    color: var(--brand-ink-700);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
}

.post-pagination li span.current {
    border-color: var(--brand-ink-900);
    background: var(--brand-ink-900);
    color: var(--brand-paper);
}

.post-pagination li a:hover {
    border-color: var(--brand-signal-strong);
    color: var(--brand-ink-900);
}

/* ---------- Category filters ---------- */
.post-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 0 0 44px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--brand-line);
}

.post-filters__item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border: 1px solid var(--brand-line);
    border-radius: 999px;
    background: var(--brand-surface);
    color: var(--brand-ink-700);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: border-color var(--brand-motion), background var(--brand-motion), color var(--brand-motion);
}

.post-filters__item:hover {
    border-color: var(--brand-line-strong);
    color: var(--brand-ink-900);
}

.post-filters__item.is-active {
    border-color: var(--brand-ink-900);
    background: var(--brand-ink-900);
    color: var(--brand-paper);
}

.post-filters__count {
    font-family: var(--brand-mono);
    font-size: 11px;
    opacity: .7;
}

/* ---------- Featured story ---------- */
.news-featured {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    margin: 0 0 44px;
    overflow: hidden;
    background: var(--brand-surface);
    border: 1px solid var(--brand-line);
    border-radius: var(--brand-radius-lg);
    box-shadow: var(--brand-shadow-md);
}

.news-featured__media {
    position: relative;
    display: block;
    min-height: 320px;
    background: var(--brand-surface-soft);
    overflow: hidden;
}

.news-featured__media img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-featured__badge {
    position: absolute;
    top: 18px;
    left: 18px;
    padding: 7px 14px;
    border-radius: 999px;
    background: var(--brand-signal);
    color: var(--brand-ink-950);
    font-family: var(--brand-mono);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.news-featured__body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 16px;
    padding: 46px 44px;
}

.news-featured__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin: 0;
    color: var(--brand-ink-500);
    font-family: var(--brand-mono);
    font-size: 12px;
    letter-spacing: .05em;
    text-transform: uppercase;
}

.news-featured__title {
    margin: 0;
    font-size: clamp(24px, 3vw, 34px);
    line-height: 1.2;
}

.news-featured__title a {
    color: var(--brand-ink-900);
    text-decoration: none;
}

.news-featured__title a:hover {
    color: var(--brand-signal-deep);
}

.news-featured__excerpt {
    margin: 0;
    color: var(--brand-ink-600);
    font-size: 15.5px;
    line-height: 1.7;
}

.news-featured__cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    align-self: flex-start;
    color: var(--brand-signal-deep);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    text-decoration: none;
    transition: gap var(--brand-motion), color var(--brand-motion);
}

.news-featured__cta:hover {
    gap: 14px;
    color: var(--brand-ink-900);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .post-related__grid,
    .post-archive__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .news-featured {
        grid-template-columns: minmax(0, 1fr);
    }

    .news-featured__media {
        min-height: 0;
        aspect-ratio: 16 / 9;
    }

    .news-featured__body {
        padding: 32px 26px 36px;
    }
}

@media (max-width: 640px) {
    .post-banner__inner {
        padding: 56px 20px 50px;
    }

    .post-body {
        padding: 44px 20px 32px;
    }

    .post-related {
        padding: 48px 20px 64px;
    }

    .post-archive__body {
        padding: 40px 20px 72px;
    }

    .post-related__grid,
    .post-archive__grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .post-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .post-actions__cta {
        justify-content: center;
    }
}