/* ============================================================
   Zhaobang Metal — Blog Content Center
   Shared layout (navbar / breadcrumb / hero / sections / footer)
   comes from /solutions/detail/detail.css (site-wide cluster CSS).
   This file only adds blog-specific components.
   ============================================================ */

/* ---------- Blog hub: article card grid ---------- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

.blog-card {
    display: flex;
    flex-direction: column;
    background: #ffffff;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: 12px;
    overflow: hidden;    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.10);
}

/* 关键修复：display:flex 会覆盖 hidden 属性的默认 display:none，
   必须显式声明，否则分页/筛选对卡片不生效 */
.blog-card[hidden] {
    display: none;
}

.blog-card-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 24px;
}

.blog-card-tag {
    align-self: flex-start;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--primary, #1a56db);
    background: rgba(26, 86, 219, 0.08);
    padding: 5px 12px;
    border-radius: 999px;
    margin-bottom: 14px;
}

.blog-card h3 {
    font-size: 1.15rem;
    line-height: 1.4;
    margin: 0 0 10px;
}

.blog-card h3 a {
    color: inherit;
    text-decoration: none;
}

.blog-card h3 a:hover {
    color: var(--primary, #1a56db);
}

.blog-card p {
    font-size: 0.92rem;
    color: var(--text-muted, #6b7280);
    line-height: 1.6;
    margin: 0 0 18px;
    flex: 1;
}

.blog-card-link {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--primary, #1a56db);
    text-decoration: none;
}

.blog-card-link i {
    transition: transform 0.2s ease;
}

.blog-card:hover .blog-card-link i {
    transform: translateX(4px);
}

/* ---------- Article page: meta + key takeaways ---------- */
.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 22px;
    justify-content: center;
    margin-top: 18px;
    font-size: 0.88rem;
    color: var(--text-muted, #6b7280);
}

.article-meta i {
    margin-right: 6px;
    color: var(--primary, #1a56db);
}

.takeaway-box {
    background: var(--bg-light, #f8fafc);
    border: 1px solid var(--border, #e5e7eb);
    border-left: 4px solid var(--primary, #1a56db);
    border-radius: 8px;
    padding: 22px 26px;
    margin: 0 0 8px;
}

.takeaway-box h3 {
    margin: 0 0 10px;
    font-size: 1rem;
}

.takeaway-box p {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-muted, #6b7280);
}

/* Further reading cards at article end */
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.related-card {
    background: #ffffff;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: 10px;
    padding: 20px 22px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-card:hover {
    border-color: var(--primary, #1a56db);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.related-card h4 {
    margin: 0 0 8px;
    font-size: 0.98rem;
    color: var(--primary, #1a56db);
}

.related-card p {
    margin: 0;
    font-size: 0.88rem;
    color: var(--text-muted, #6b7280);
    line-height: 1.55;
}

@media (max-width: 640px) {
    .blog-grid,
    .related-grid {
        grid-template-columns: 1fr;
    }
}

/* ---------- Blog hero: background image + dark overlay ---------- */
/* 遮罩沿用站内 page-hero 统一口径（rgba(16,24,32,0.85)），保证白字可读 */
.hero-blog {
    background:
        linear-gradient(rgba(16, 24, 32, 0.85), rgba(16, 24, 32, 0.85)),
        url("/images/Industrial-Factory.webp") center/cover no-repeat;
}

.hero-blog-noise {
    background:
        linear-gradient(rgba(16, 24, 32, 0.85), rgba(16, 24, 32, 0.85)),
        url("/images/Highway-Noise-Control-Highway-Noise-Barriers-1600w.webp") center/cover no-repeat;
}

.hero-blog-mesh {
    background:
        linear-gradient(rgba(16, 24, 32, 0.85), rgba(16, 24, 32, 0.85)),
        url("/images/Crimped-Wire-Mesh-Industrial-Screening.webp") center/cover no-repeat;
}

.hero-blog-grating {
    background:
        linear-gradient(rgba(16, 24, 32, 0.85), rgba(16, 24, 32, 0.85)),
        url("/images/Steel-Grating-Industrial-Platform.webp") center/cover no-repeat;
}

.hero-blog-fencing {
    background:
        linear-gradient(rgba(16, 24, 32, 0.85), rgba(16, 24, 32, 0.85)),
        url("/images/metal-security-fence-for-industrial-perimeter.webp") center/cover no-repeat;
}

/* ---------- Blog list: category filter buttons ---------- */
.blog-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin: 0 0 32px;
}

.blog-filter-btn {
    padding: 8px 20px;
    border: 1px solid var(--border-color, rgba(0, 0, 0, 0.12));
    border-radius: 999px;
    background: #fff;
    color: var(--text-dark, #1f2937);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition, all 0.3s ease);
}

.blog-filter-btn:hover {
    border-color: var(--primary, #FFB800);
    color: var(--primary-hover, #e0a200);
}

.blog-filter-btn.active {
    background: var(--primary, #FFB800);
    border-color: var(--primary, #FFB800);
    color: #101820;
}

/* ---------- Blog list: pagination ---------- */
.blog-pagination {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin: 36px 0 0;
}

.blog-pagination[hidden] {
    display: none;
}

.blog-page-btn {
    min-width: 42px;
    height: 42px;
    padding: 0 12px;
    border: 1px solid var(--border-color, rgba(0, 0, 0, 0.12));
    border-radius: 10px;
    background: #fff;
    color: var(--text-dark, #1f2937);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition, all 0.3s ease);
}

.blog-page-btn:hover:not(:disabled) {
    border-color: var(--primary, #FFB800);
    color: var(--primary-hover, #e0a200);
}

.blog-page-btn.active {
    background: var(--primary, #FFB800);
    border-color: var(--primary, #FFB800);
    color: #101820;
}

.blog-page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Visually hidden (a11y labels inside pagination arrows) */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}