.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;
}

.hero.blog-stage {
    min-height: 0;
    display: block;
    padding: calc(var(--header-h) + 2.4rem) 0 2.6rem;
}
.blog-stage .hero-canvas,
.blog-stage .hero-glow,
.blog-stage .hero-grid { opacity: 0.9; }
.blog-stage-inner {
    position: relative;
    z-index: 2;
    max-width: calc(var(--max) + 4rem);
    margin: 0 auto;
    padding: 0 1.25rem;
}
.blog-stage-inner h1 {
    max-width: 16ch;
    font-size: clamp(2rem, 4.4vw, 3.35rem);
    font-weight: 800;
    letter-spacing: -0.035em;
    line-height: 1.25;
    margin: 0.35rem 0 0.85rem;
}
.blog-lead { max-width: 38rem; margin: 0 0 1.25rem; }

.ai-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    align-items: center;
    font-size: 0.8rem;
    color: var(--ink-muted);
    margin-bottom: 1rem;
}
.ai-breadcrumb a:hover { color: var(--primary); }

.ai-search {
    display: flex;
    gap: 0.55rem;
    max-width: 640px;
    margin: 0 0 1.1rem;
}
.ai-search input {
    flex: 1;
    min-width: 0;
    border: 1px solid rgba(255,255,255,0.55);
    background: rgba(255,255,255,0.78);
    backdrop-filter: blur(16px);
    border-radius: 999px;
    padding: 0.85rem 1.15rem;
    font: inherit;
    box-shadow: 0 10px 30px rgba(12, 27, 44, 0.06);
}
.ai-search input:focus {
    outline: 2px solid rgba(30, 77, 107, 0.35);
    outline-offset: 2px;
}

.ai-cats {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}
.ai-cats a {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.38rem 0.85rem;
    border-radius: 999px;
    background: rgba(255,255,255,0.72);
    border: 1px solid var(--line);
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--ink-muted);
}
.ai-cats a small {
    font-size: 0.72rem;
    opacity: 0.7;
}
.ai-cats a.is-active,
.ai-cats a:hover {
    background: var(--ink);
    color: #fff;
    border-color: var(--ink);
}

.blog-board { padding-top: 0.4rem; }
.related-board { background: linear-gradient(180deg, #eef3f8 0%, var(--bg) 100%); }

.ai-empty {
    text-align: center;
    padding: 3rem 1rem;
    background: #fff;
    border: 1px dashed var(--line);
    border-radius: 24px;
}
.ai-empty strong { display: block; margin-bottom: 0.4rem; font-size: 1.1rem; }

.ai-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.15rem;
    margin-top: 1.15rem;
}

.ai-card {
    position: relative;
    min-height: 100%;
    border-radius: 22px;
    overflow: hidden;
    background: #fff;
    border: 1px solid rgba(21, 32, 51, 0.08);
    box-shadow: 0 18px 40px rgba(12, 27, 44, 0.06);
    transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}
.ai-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 28px 60px rgba(12, 27, 44, 0.12);
    border-color: rgba(30, 77, 107, 0.22);
}
.ai-card-link { display: flex; flex-direction: column; height: 100%; color: inherit; }
.ai-card-media {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background:
        radial-gradient(circle at 20% 20%, rgba(88, 150, 210, 0.35), transparent 42%),
        radial-gradient(circle at 80% 80%, rgba(168, 137, 58, 0.28), transparent 40%),
        linear-gradient(145deg, #10263a, #1e4d6b);
}
.ai-card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}
.ai-card:hover .ai-card-media img { transform: scale(1.06); }
.ai-card-glow {
    position: absolute;
    inset: auto -20% -40% auto;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, rgba(90, 180, 255, 0.35), transparent 70%);
    pointer-events: none;
}
.ai-card-placeholder {
    width: 100%;
    height: 100%;
    display: grid;
    place-items: center;
    color: rgba(255,255,255,0.86);
    font-weight: 700;
    letter-spacing: 0.08em;
    font-size: 0.78rem;
    text-transform: uppercase;
}
.ai-orb {
    position: absolute;
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: radial-gradient(circle, #7ec8ff, transparent 70%);
    filter: blur(2px);
    animation: aiPulse 4s ease-in-out infinite;
}
@keyframes aiPulse {
    0%, 100% { transform: scale(1); opacity: 0.7; }
    50% { transform: scale(1.18); opacity: 1; }
}
.ai-card-body {
    padding: 1.05rem 1.15rem 1.15rem;
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    flex: 1;
}
.ai-card-top { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.ai-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.18rem 0.62rem;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary-deep);
    font-size: 0.74rem;
    font-weight: 700;
}
.ai-chip.ghost {
    background: var(--bg-soft);
    color: var(--ink-muted);
}
.ai-chip svg { width: 13px; height: 13px; }
.ai-card-title {
    font-size: 1.08rem;
    font-weight: 800;
    line-height: 1.55;
    letter-spacing: -0.02em;
}
.ai-card-excerpt {
    color: var(--ink-muted);
    font-size: 0.9rem;
    line-height: 1.75;
}
.ai-card-foot {
    margin-top: auto;
    padding-top: 0.7rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.8rem;
    color: var(--ink-muted);
}
.ai-card-cta {
    font-weight: 700;
    color: var(--primary);
}

.ai-card.is-featured {
    display: grid;
    margin-bottom: 0.2rem;
}
.ai-card.is-featured .ai-card-link {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    min-height: 340px;
}
.ai-card.is-featured .ai-card-media { aspect-ratio: auto; min-height: 340px; }
.ai-card.is-featured .ai-card-title { font-size: clamp(1.35rem, 2.4vw, 2rem); }
.ai-card.is-featured .ai-card-body { padding: 1.6rem 1.7rem; justify-content: center; }

.article-hero { padding-bottom: 2.1rem; }
.article-hero-inner h1 {
    max-width: 18ch;
    font-size: clamp(1.85rem, 4vw, 3.1rem);
}
.article-chips { margin-bottom: 0.85rem; }
.article-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem 1.1rem;
    color: var(--ink-muted);
    font-size: 0.9rem;
    margin-top: 1rem;
}
.stat-views {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-weight: 700;
    color: var(--primary-deep);
}
.stat-views svg { width: 16px; height: 16px; }

.article-shell {
    max-width: 860px;
    margin: -1.2rem auto 0;
    padding: 0 1.25rem 3.5rem;
    position: relative;
    z-index: 3;
}
.article-cover {
    margin: 0 0 1.6rem;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 30px 70px rgba(12, 27, 44, 0.18);
}
.article-cover img { width: 100%; display: block; }
.article-layout {
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 1.2rem;
    align-items: start;
}
.article-share {
    position: sticky;
    top: calc(var(--header-h) + 18px);
    display: grid;
    gap: 0.45rem;
    justify-items: center;
    padding-top: 0.4rem;
}
.article-share span {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    color: var(--ink-muted);
    margin-bottom: 0.3rem;
}
.article-share a {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: #fff;
    border: 1px solid var(--line);
    font-size: 0.72rem;
    font-weight: 800;
    color: var(--primary);
}
.article-share a:hover { background: var(--ink); color: #fff; }

.blog-board .pager,
.section .pager {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.8rem;
    flex-wrap: wrap;
    gap: 0.6rem;
}
.pager-btns { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.pager-current {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    background: var(--ink);
    color: #fff;
}

@media (max-width: 980px) {
    .ai-grid { grid-template-columns: 1fr 1fr; }
    .ai-card.is-featured .ai-card-link,
    .article-layout { grid-template-columns: 1fr; }
    .ai-card.is-featured .ai-card-media { min-height: 220px; }
    .article-share {
        position: static;
        grid-auto-flow: column;
        justify-content: start;
        margin-bottom: 1rem;
    }
    .article-share span { writing-mode: horizontal-tb; transform: none; }
}
@media (max-width: 700px) {
    .ai-grid { grid-template-columns: 1fr; }
    .ai-search { flex-direction: column; }
    .blog-stage-inner h1,
    .article-hero-inner h1 { max-width: none; }
}