.ai-page {
    --ai-ink: #101010;
    --ai-soft-ink: #404040;
    --ai-border: #dbdbdb;
    --ai-paper: #f6f4ef;
    --ai-panel: #f4f5f7;
    --ai-accent: #be1f1f;
}

.ai-shell {
    max-width: 1200px;
    margin: 0 auto;
    padding-bottom: 2rem;
}

.ai-masthead {
    border: 1px solid var(--ai-border);
    background: linear-gradient(130deg, #f8f7f4 0%, #ece9e2 100%);
    padding: 2.1rem 1.5rem 1.6rem;
    margin-bottom: 1rem;
    position: relative;
    overflow: hidden;
}

.ai-masthead::before {
    content: "";
    position: absolute;
    right: -140px;
    top: -140px;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(190, 31, 31, 0.2), rgba(190, 31, 31, 0));
    pointer-events: none;
}

.ai-kicker {
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-weight: 700;
    color: #3f3f3f;
    margin-bottom: 0.75rem;
}

.ai-masthead h1 {
    margin: 0 0 0.65rem;
    font-size: clamp(2rem, 3.5vw, 3.35rem);
    line-height: 1.02;
    letter-spacing: -0.04em;
    text-wrap: balance;
    max-width: 850px;
}

.ai-masthead p {
    margin: 0;
    max-width: 820px;
    font-size: 1.05rem;
    line-height: 1.72;
    color: var(--ai-soft-ink);
}

.ai-stats {
    margin-top: 1.2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.ai-stat {
    border: 1px solid #d3d3d3;
    padding: 0.38rem 0.62rem;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: rgba(255, 255, 255, 0.8);
    color: #4d4d4d;
}

.ai-tag-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 1.15rem;
}

.ai-evolution-strip {
    border: 1px solid var(--ai-border);
    background: #fff;
    margin-bottom: 1rem;
    padding: 0.9rem 0.9rem 0.8rem;
}

.ai-evolution-strip h3 {
    margin: 0 0 0.7rem;
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #2f2f2f;
}

.ai-evolution-row {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 2px;
}

.ai-evo-card {
    min-width: 190px;
    border: 1px solid #e0e0e0;
    background: #fafafa;
    padding: 0.58rem 0.62rem;
}

.ai-evo-card .era {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #6f6f6f;
    margin-bottom: 0.2rem;
}

.ai-evo-card .title {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
    line-height: 1.3;
}

.ai-evo-card .note {
    font-size: 0.8rem;
    color: #4b4b4b;
    line-height: 1.45;
}

.ai-tag-pill {
    display: inline-block;
    padding: 7px 13px;
    border: 1px solid var(--ai-border);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    text-decoration: none;
    color: #5a5a5a;
    background: #fff;
    transition: all 0.15s ease;
}

.ai-tag-pill:hover,
.ai-tag-pill.active {
    background: #141414;
    border-color: #141414;
    color: #fff;
}

.ai-layout {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
    gap: 14px;
}

.ai-main-col,
.ai-rail {
    min-width: 0;
}

.ai-feature-card {
    border: 1px solid var(--ai-border);
    background: #fff;
    padding: 1.4rem;
    margin-bottom: 12px;
}

.ai-feature-card .meta {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #6a6a6a;
    margin-bottom: 0.45rem;
}

.ai-feature-card h2 {
    margin: 0 0 0.65rem;
    font-size: clamp(1.45rem, 2vw, 2rem);
    line-height: 1.16;
    letter-spacing: -0.02em;
    max-width: 95%;
}

.ai-feature-card h2 a {
    text-decoration: none;
}

.ai-feature-card h2 a:hover {
    text-decoration: underline;
}

.ai-feature-card p {
    margin: 0;
    font-size: 1.01rem;
    color: #3f3f3f;
    line-height: 1.78;
}

.ai-cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.ai-news-card {
    border: 1px solid var(--ai-border);
    background: #fff;
    padding: 1.1rem 1rem;
    transition: all 0.18s ease;
}

.ai-news-card:hover {
    border-color: #bdbdbd;
    box-shadow: 0 10px 22px rgba(10, 10, 10, 0.06);
    transform: translateY(-2px);
}

.ai-news-meta {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #717171;
    margin-bottom: 0.46rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.significance-badge {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.significance-high { background: #d93025; }
.significance-medium { background: #f9a825; }
.significance-low { background: #aaa; }

.ai-news-card h3 {
    margin: 0 0 0.5rem;
    font-size: 1.12rem;
    line-height: 1.34;
    letter-spacing: -0.01em;
}

.ai-news-card h3 a {
    text-decoration: none;
}

.ai-news-card h3 a:hover {
    text-decoration: underline;
}

.ai-news-summary {
    margin: 0 0 0.75rem;
    color: #424242;
    font-size: 0.95rem;
    line-height: 1.67;
}

.ai-news-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.ai-news-tag {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 3px 7px;
    border: 1px solid #d9d9d9;
    text-decoration: none;
    color: #666;
}

.ai-news-tag:hover {
    background: #111;
    color: #fff;
}

.ai-rail-card {
    border: 1px solid var(--ai-border);
    background: var(--ai-panel);
    padding: 1rem;
    margin-bottom: 12px;
}

.ai-rail-card h4 {
    margin: 0 0 0.62rem;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.ai-rail-card p {
    margin: 0;
    font-size: 0.93rem;
    line-height: 1.62;
    color: #494949;
}

.ai-legend-row {
    display: flex;
    gap: 8px;
    margin-top: 0.55rem;
}

.ai-legend-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #5b5b5b;
}

.pagination-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    padding: 2.1rem 0;
    font-size: 14px;
}

.pagination-bar a {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 2px;
}

.ai-detail-page {
    --ai-accent: #c92222;
    --ai-paper: #f8f8f6;
    --ai-ink-soft: #3f3f3f;
}

.ai-detail-shell {
    max-width: 880px;
    margin: 0 auto;
    padding-bottom: 2rem;
}

.ai-back-link,
.ai-tag-back {
    display: inline-block;
    margin-bottom: 1rem;
    padding-top: 1rem;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-decoration: none;
    color: var(--c-grey-light);
}

.ai-detail-header {
    padding: 2.25rem 0 1.75rem;
    border-bottom: 1px solid #dfdfdf;
    margin-bottom: 2.2rem;
}

.ai-detail-meta {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--c-grey-light);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.ai-detail-header h1 {
    font-size: clamp(2rem, 3.2vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 0 0 1.1rem;
    line-height: 1.08;
    text-wrap: balance;
}

.ai-detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.ai-detail-tag {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 4px 10px;
    border: 1px solid #dfdfdf;
    text-decoration: none;
    color: #555;
    background: #fff;
    transition: all 0.18s ease;
}

.ai-detail-tag:hover {
    background: var(--c-black);
    color: var(--c-white);
}

.ai-prose {
    margin-bottom: 2rem;
    max-width: 760px;
}

.ai-prose p {
    font-family: "Georgia", "Times New Roman", serif;
    color: var(--ai-ink-soft);
    font-size: clamp(1.06rem, 1.15vw, 1.22rem);
    line-height: 1.94;
    margin: 0 0 1.1rem;
}

.ai-prose h2 {
    font-size: 1.25rem;
    margin: 2rem 0 0.8rem;
    letter-spacing: -0.01em;
}

.ai-prose h3 {
    font-size: 1.02rem;
    margin: 1.25rem 0 0.55rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #2b2b2b;
}

.ai-prose ul {
    margin: 0 0 1.15rem 1.05rem;
    padding-left: 0.7rem;
}

.ai-prose li {
    font-family: "Georgia", "Times New Roman", serif;
    font-size: clamp(1.02rem, 1.05vw, 1.13rem);
    line-height: 1.78;
    color: #3f3f3f;
    margin-bottom: 0.4rem;
}

.ai-prose p:first-child::first-letter {
    float: left;
    font-size: 3.35rem;
    line-height: 0.9;
    margin-right: 0.45rem;
    color: var(--ai-accent);
    font-weight: 700;
}

.career-angle-box {
    border: 1px solid #dfdfdf;
    padding: 1.6rem;
    margin: 2.2rem 0;
    background: var(--ai-paper);
}

.career-angle-box h2 {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin: 0 0 0.9rem;
    color: var(--c-black);
}

.career-angle-box-content {
    font-size: 1.02rem;
    line-height: 1.8;
    color: #404040;
}

.ai-source-box {
    font-size: 13px;
    padding: 1.1rem 0;
    border-top: 1px solid #dfdfdf;
    border-bottom: 1px solid #dfdfdf;
    margin-bottom: 2.2rem;
    color: #555;
}

.ai-source-box a {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 2px;
}

.ai-evolution-box {
    border: 1px solid #dfdfdf;
    background: #fff;
    padding: 1rem;
    margin: 1.6rem 0 2rem;
}

.ai-evolution-box h2 {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin: 0 0 0.65rem;
}

.ai-evolution-box p {
    margin: 0 0 0.75rem;
    font-size: 0.95rem;
    line-height: 1.62;
    color: #454545;
}

.ai-evolution-mini {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.ai-evo-mini-card {
    border: 1px solid #e0e0e0;
    background: #fafafa;
    padding: 0.5rem 0.55rem;
}

.ai-evo-mini-card .era {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #6f6f6f;
}

.ai-evo-mini-card .title {
    font-size: 0.84rem;
    line-height: 1.32;
    font-weight: 700;
    margin-top: 0.1rem;
}

.ai-section-title {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin: 0 0 0.95rem;
}

.ai-visual-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.ai-visual-grid img {
    width: 100%;
    border: 1px solid #dfdfdf;
    background: #fff;
}

.ai-related-section {
    margin-top: 2rem;
}

.ai-related-card {
    border: 1px solid #dedede;
    padding: 1rem 1.2rem;
    margin-bottom: 0.75rem;
    text-decoration: none;
    display: block;
    background: #fff;
    transition: all 0.18s ease;
}

.ai-related-card:hover {
    border-color: #bfbfbf;
    transform: translateY(-1px);
}

.ai-related-card h3 {
    margin: 0 0 0.25rem;
    font-size: 1.06rem;
    line-height: 1.35;
}

.ai-related-card p {
    margin: 0;
    font-size: 12px;
    color: var(--c-grey-light);
}

.ai-tag-page {
    --ai-grad-a: #f5f5f3;
    --ai-grad-b: #eceae6;
}

.ai-tag-hero {
    padding: 2.2rem 1.4rem 1.5rem;
    border: 1px solid #ddd;
    background: linear-gradient(120deg, var(--ai-grad-a) 0%, var(--ai-grad-b) 100%);
    margin-bottom: 1.8rem;
}

.ai-tag-hero h1 {
    margin: 0;
    font-size: clamp(1.8rem, 2.8vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -0.03em;
}

.ai-tag-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 12px;
}

.ai-tag-card {
    grid-column: span 6;
    border: 1px solid #dedede;
    padding: 1.4rem;
    background: #fff;
    transition: all 0.2s ease;
}

.ai-tag-card:hover {
    border-color: #b8b8b8;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.06);
    transform: translateY(-2px);
}

.ai-tag-meta {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--c-grey-light);
    margin-bottom: 0.55rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.ai-tag-card h3 {
    margin: 0 0 0.55rem;
    font-size: 1.22rem;
    letter-spacing: -0.01em;
    line-height: 1.33;
}

.ai-tag-card h3 a {
    text-decoration: none;
}

.ai-tag-card h3 a:hover {
    text-decoration: underline;
}

.ai-tag-card p {
    margin: 0;
    color: #3f3f3f;
    font-size: 1rem;
    line-height: 1.7;
}

.ai-pagination {
    display: flex;
    justify-content: center;
    gap: 12px;
    padding: 2rem 0;
    font-size: 14px;
}

.ai-pagination a {
    text-decoration: underline;
}

@media (max-width: 1080px) {
    .ai-layout {
        grid-template-columns: 1fr;
    }

    .ai-rail {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
    }
}

@media (max-width: 960px) {
    .ai-tag-card {
        grid-column: span 12;
    }
}

@media (max-width: 840px) {
    .ai-cards {
        grid-template-columns: 1fr;
    }

    .ai-rail {
        grid-template-columns: 1fr;
    }

    .ai-tag-bar {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 5px;
    }
}

@media (min-width: 900px) {
    .ai-visual-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 820px) {
    .ai-detail-header h1 {
        font-size: 1.95rem;
    }

    .ai-prose p {
        font-size: 1.02rem;
        line-height: 1.85;
    }

    .ai-prose p:first-child::first-letter {
        font-size: 2.8rem;
    }

    .ai-evolution-mini {
        grid-template-columns: 1fr;
    }
}