/* Scoped styles: all article rules live below .pfca-article-template. */
:root {
    --pfca-ink: #172033;
    --pfca-body: #39465e;
    --pfca-muted: #69758a;
    --pfca-line: #e3e7ee;
    --pfca-paper: #ffffff;
    --pfca-canvas: #f6f7f9;
    --pfca-blue: #3157d5;
    --pfca-blue-soft: #eef2ff;
    --pfca-teal: #087f75;
    --pfca-amber: #b45309;
    --pfca-radius: 8px;
    --pfca-shadow: 0 16px 40px rgba(23, 32, 51, 0.08);
}

html {
    scroll-behavior: smooth;
}

.pfca-progress {
    position: fixed;
    z-index: 9999;
    top: 0;
    right: 0;
    left: 0;
    height: 3px;
    pointer-events: none;
}

.pfca-progress span {
    display: block;
    width: 0;
    height: 100%;
    background: var(--pfca-blue);
    transition: width 80ms linear;
}

.pfca-article-template {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0 0 88px;
    overflow: clip;
    color: var(--pfca-body);
    background: var(--pfca-canvas);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 17px;
    line-height: 1.85;
    letter-spacing: 0;
}

body.pfca-ai-seo-post .site-content {
    padding-top: 16px;
}

.pfca-article-template *,
.pfca-article-template *::before,
.pfca-article-template *::after {
    box-sizing: border-box;
}

.pfca-shell {
    width: min(1560px, calc(100% - 64px));
    margin: 0 auto;
    padding-top: 24px;
}

.pfca-article-template--theme-hero .pfca-shell {
    padding-top: 0;
}

.pfca-layout {
    display: grid;
    grid-template-columns: 264px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
    padding: 72px 52px 88px 24px;
    border: 1px solid var(--pfca-line);
    border-radius: var(--pfca-radius);
    background: var(--pfca-paper);
    box-shadow: var(--pfca-shadow);
}

.pfca-layout--no-toc {
    display: block;
}

.pfca-layout--no-toc .pfca-article {
    grid-column: auto;
    max-width: 940px;
    margin: 0 auto;
}

.pfca-article {
    grid-column: 2;
    min-width: 0;
}

.pfca-hero {
    max-width: 980px;
    padding-bottom: 44px;
    border-bottom: 1px solid var(--pfca-line);
}

.pfca-kicker {
    display: inline-flex;
    margin-bottom: 22px;
    padding: 5px 10px;
    border: 1px solid #ccd5f8;
    border-radius: 4px;
    color: var(--pfca-blue);
    background: var(--pfca-blue-soft);
    font-size: 13px;
    font-weight: 700;
    line-height: 1.4;
    text-decoration: none;
}

.pfca-article-template .pfca-hero h1 {
    max-width: 1000px;
    margin: 0;
    color: var(--pfca-ink);
    font-size: 58px;
    font-weight: 800;
    line-height: 1.14;
    letter-spacing: 0;
    overflow-wrap: anywhere;
}

.pfca-deck {
    max-width: 900px;
    margin: 24px 0 0;
    color: #56637a;
    font-size: 19px;
    line-height: 1.75;
}

.pfca-byline {
    display: flex;
    gap: 13px;
    align-items: center;
    margin-top: 30px;
}

.pfca-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
}

.pfca-byline div {
    display: grid;
    gap: 2px;
}

.pfca-byline strong {
    color: var(--pfca-ink);
    font-size: 14px;
    line-height: 1.5;
}

.pfca-byline span {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    color: var(--pfca-muted);
    font-size: 13px;
    line-height: 1.5;
}

.pfca-byline i {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: #b4bdca;
}

.pfca-cover {
    margin: 44px 0 54px;
}

.pfca-cover img {
    display: block;
    width: 100%;
    height: auto;
    max-height: 620px;
    aspect-ratio: 16 / 9;
    border-radius: 6px;
    object-fit: cover;
}

.pfca-cover figcaption,
.pfca-prose figcaption {
    margin-top: 10px;
    color: var(--pfca-muted);
    font-size: 13px;
    text-align: center;
}

.pfca-prose {
    max-width: 920px;
    padding-top: 52px;
    color: var(--pfca-body);
}

.pfca-cover + .pfca-prose {
    padding-top: 0;
}

.pfca-article-template--theme-hero .pfca-cover {
    margin-top: 0;
}

.pfca-article-template--theme-hero .pfca-prose {
    padding-top: 0;
}

.pfca-prose > *:first-child {
    margin-top: 0 !important;
}

.pfca-article-template .pfca-prose h2,
.pfca-article-template .pfca-prose h3,
.pfca-article-template .pfca-prose h4 {
    scroll-margin-top: 34px;
    color: var(--pfca-ink);
    font-weight: 800;
    letter-spacing: 0;
}

.pfca-article-template .pfca-prose h2 {
    margin: 72px 0 24px;
    padding-top: 22px;
    border-top: 1px solid var(--pfca-line);
    font-size: 34px;
    line-height: 1.3;
}

.pfca-article-template .pfca-prose h3 {
    margin: 48px 0 18px;
    font-size: 24px;
    line-height: 1.4;
}

.pfca-article-template .pfca-prose h4 {
    margin: 34px 0 14px;
    font-size: 19px;
    line-height: 1.5;
}

.pfca-prose p,
.pfca-prose ul,
.pfca-prose ol,
.pfca-prose table,
.pfca-prose pre,
.pfca-prose blockquote,
.pfca-prose figure {
    margin-top: 0;
    margin-bottom: 26px;
}

.pfca-prose p {
    font-size: 17px;
    line-height: 1.9;
}

.pfca-prose a {
    color: var(--pfca-blue);
    text-decoration-thickness: 1px;
    text-underline-offset: 4px;
}

.pfca-prose a:hover {
    color: #203fa8;
}

.pfca-prose strong {
    color: var(--pfca-ink);
    font-weight: 750;
}

.pfca-prose ul,
.pfca-prose ol {
    padding-left: 1.4em;
}

.pfca-prose li {
    margin: 9px 0;
    padding-left: 5px;
}

.pfca-prose li::marker {
    color: var(--pfca-blue);
    font-weight: 700;
}

.pfca-prose blockquote {
    padding: 24px 28px;
    border: 0;
    border-left: 4px solid var(--pfca-blue);
    border-radius: 0 6px 6px 0;
    color: #35415a;
    background: var(--pfca-blue-soft);
}

.pfca-prose blockquote p:last-child {
    margin-bottom: 0;
}

.pfca-prose .wp-block-pullquote {
    padding: 34px 0;
    border-top: 2px solid var(--pfca-ink);
    border-bottom: 1px solid var(--pfca-line);
    color: var(--pfca-ink);
}

.pfca-prose .wp-block-pullquote blockquote {
    padding: 0;
    border: 0;
    background: transparent;
}

.pfca-prose .wp-block-table {
    overflow-x: auto;
}

.pfca-prose table {
    width: 100%;
    border-spacing: 0;
    border-collapse: collapse;
    font-size: 15px;
}

.pfca-prose th,
.pfca-prose td {
    padding: 14px 16px;
    border: 1px solid var(--pfca-line);
    text-align: left;
    vertical-align: top;
}

.pfca-prose th {
    color: var(--pfca-ink);
    background: #f0f3f7;
    font-weight: 700;
}

.pfca-prose code {
    padding: 2px 6px;
    border-radius: 4px;
    color: #8a3b09;
    background: #fff5e9;
    font-size: 0.9em;
}

.pfca-prose pre {
    overflow-x: auto;
    padding: 22px;
    border-radius: 6px;
    color: #e8edf6;
    background: #182130;
    line-height: 1.65;
}

.pfca-prose pre code {
    padding: 0;
    color: inherit;
    background: transparent;
}

.pfca-prose img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
}

.pfca-prose .wp-block-separator {
    margin: 56px 0;
    border: 0;
    border-top: 1px solid var(--pfca-line);
}

.pfca-prose .is-style-note,
.pfca-prose .is-style-tip,
.pfca-prose .pfca-note {
    padding: 20px 22px;
    border-left: 4px solid var(--pfca-teal);
    border-radius: 0 6px 6px 0;
    background: #ecf9f5;
}

.pfca-toc {
    position: relative;
    grid-row: 1;
    grid-column: 1;
    align-self: stretch;
    min-width: 0;
}

.pfca-toc__panel {
    position: sticky;
    top: 28px;
    max-height: calc(100vh - 56px);
    overflow: auto;
    padding-right: 24px;
    border-right: 1px solid var(--pfca-line);
    scrollbar-width: thin;
}

.pfca-toc__top {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: baseline;
    margin-bottom: 15px;
}

.pfca-toc__top strong {
    color: var(--pfca-ink);
    font-size: 15px;
}

.pfca-toc__top span {
    color: var(--pfca-muted);
    font-size: 11px;
    white-space: nowrap;
}

.pfca-toc ol,
.pfca-toc-drawer ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

.pfca-toc li {
    margin: 0;
}

.pfca-toc li.is-sub a {
    padding-left: 18px;
    font-size: 12px;
}

.pfca-toc a {
    display: block;
    padding: 8px 8px 8px 13px;
    border-left: 2px solid transparent;
    color: var(--pfca-muted);
    font-size: 13px;
    line-height: 1.55;
    text-decoration: none;
    transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.pfca-toc a:hover,
.pfca-toc a.is-active {
    border-left-color: var(--pfca-blue);
    color: var(--pfca-blue);
    background: #f7f8ff;
}

.pfca-toc .pfca-back-top {
    margin-top: 14px;
    padding-top: 13px;
    border-top: 1px solid var(--pfca-line);
    border-left: 0;
    color: var(--pfca-body);
    font-weight: 700;
}

.pfca-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin-top: 68px;
    padding-top: 24px;
    border-top: 1px solid var(--pfca-line);
    font-size: 13px;
}

.pfca-tags > span {
    margin-right: 4px;
    color: var(--pfca-ink);
    font-weight: 700;
}

.pfca-tags a {
    padding: 5px 9px;
    border: 1px solid var(--pfca-line);
    border-radius: 4px;
    color: var(--pfca-muted);
    text-decoration: none;
}

.pfca-tags a:hover {
    border-color: #bbc4d2;
    color: var(--pfca-ink);
}

.pfca-related {
    margin-top: 64px;
    padding: 54px clamp(32px, 5vw, 72px);
    border-top: 4px solid var(--pfca-amber);
    background: #ffffff;
}

.pfca-related__heading p {
    margin: 0 0 4px;
    color: var(--pfca-amber);
    font-size: 12px;
    font-weight: 800;
}

.pfca-article-template .pfca-related__heading h2 {
    margin: 0 0 28px;
    color: var(--pfca-ink);
    font-size: 28px;
    line-height: 1.3;
}

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

.pfca-related article {
    overflow: hidden;
    border: 1px solid var(--pfca-line);
    border-radius: 6px;
    background: #fff;
}

.pfca-related__image {
    display: block;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: #eef1f5;
}

.pfca-related__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 240ms ease;
}

.pfca-related article:hover img {
    transform: scale(1.025);
}

.pfca-related article > div {
    padding: 20px;
}

.pfca-related time {
    color: var(--pfca-muted);
    font-size: 11px;
}

.pfca-article-template .pfca-related h3 {
    margin: 7px 0 10px;
    font-size: 18px;
    line-height: 1.45;
}

.pfca-related h3 a {
    color: var(--pfca-ink);
    text-decoration: none;
}

.pfca-related article p {
    margin: 0;
    color: var(--pfca-muted);
    font-size: 13px;
    line-height: 1.7;
}

.pfca-comments {
    max-width: 940px;
    margin: 64px auto 0;
    padding: 42px;
    background: #fff;
}

.pfca-toc-toggle,
.pfca-toc-drawer,
.pfca-drawer-scrim {
    display: none;
}

@media (max-width: 1100px) {
    .pfca-shell {
        width: min(100% - 40px, 1120px);
    }

    .pfca-layout {
        grid-template-columns: 228px minmax(0, 1fr);
        gap: 30px;
        padding: 50px 32px 58px 20px;
    }

    .pfca-article-template .pfca-hero h1 {
        font-size: 48px;
    }
}

@media (max-width: 820px) {
    body.pfca-ai-seo-post .site-content {
        padding-top: 12px;
    }

    body.pfca-drawer-open {
        overflow: hidden;
    }

    .pfca-shell {
        width: min(100% - 24px, 760px);
        padding-top: 12px;
    }

    .pfca-article-template--theme-hero .pfca-shell {
        padding-top: 0;
    }

    .pfca-layout {
        display: block;
        padding: 42px 28px 54px;
    }

    .pfca-article {
        grid-column: auto;
    }

    .pfca-article-template .pfca-hero h1 {
        font-size: 38px;
    }

    .pfca-toc {
        display: none;
    }

    .pfca-toc-toggle {
        position: fixed;
        z-index: 9997;
        right: 18px;
        bottom: 18px;
        display: inline-flex;
        gap: 8px;
        align-items: center;
        min-width: 92px;
        min-height: 46px;
        justify-content: center;
        padding: 0 15px;
        border: 0;
        border-radius: 6px;
        color: #fff;
        background: var(--pfca-ink);
        box-shadow: 0 8px 28px rgba(23, 32, 51, 0.24);
        font: inherit;
        font-size: 14px;
        font-weight: 700;
        cursor: pointer;
    }

    .pfca-toc-drawer {
        position: fixed;
        z-index: 9999;
        right: 0;
        bottom: 0;
        left: 0;
        display: block;
        max-height: min(72vh, 640px);
        overflow: auto;
        padding: 28px 22px calc(28px + env(safe-area-inset-bottom));
        border-radius: 8px 8px 0 0;
        background: #fff;
        box-shadow: 0 -16px 48px rgba(23, 32, 51, 0.18);
        transform: translateY(105%);
        transition: transform 220ms ease;
    }

    .pfca-drawer-open .pfca-toc-drawer {
        transform: translateY(0);
    }

    .pfca-toc-drawer > strong {
        display: block;
        margin-bottom: 16px;
        color: var(--pfca-ink);
        font-size: 18px;
    }

    .pfca-toc-drawer li.is-sub a {
        padding-left: 26px;
    }

    .pfca-toc-drawer a {
        display: block;
        padding: 10px 8px;
        border-bottom: 1px solid var(--pfca-line);
        color: var(--pfca-body);
        font-size: 14px;
        line-height: 1.55;
        text-decoration: none;
    }

    .pfca-toc-close {
        position: absolute;
        top: 15px;
        right: 16px;
        width: 36px;
        height: 36px;
        padding: 0;
        border: 0;
        color: var(--pfca-muted);
        background: transparent;
        font-size: 28px;
        line-height: 1;
        cursor: pointer;
    }

    .pfca-drawer-scrim {
        position: fixed;
        z-index: 9998;
        inset: 0;
        display: block;
        visibility: hidden;
        background: rgba(12, 19, 33, 0.48);
        opacity: 0;
        transition: opacity 220ms ease, visibility 220ms ease;
    }

    .pfca-drawer-open .pfca-drawer-scrim {
        visibility: visible;
        opacity: 1;
    }

    .pfca-related__grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 540px) {
    .pfca-article-template {
        padding-bottom: 56px;
        font-size: 16px;
    }

    .pfca-shell {
        width: 100%;
        padding-top: 0;
    }

    .pfca-layout {
        padding: 34px 20px 48px;
        border-right: 0;
        border-left: 0;
        border-radius: 0;
        box-shadow: none;
    }

    .pfca-kicker {
        margin-bottom: 16px;
    }

    .pfca-article-template .pfca-hero h1 {
        font-size: 32px;
        line-height: 1.2;
    }

    .pfca-deck {
        margin-top: 18px;
        font-size: 16px;
    }

    .pfca-byline {
        align-items: flex-start;
    }

    .pfca-byline span {
        gap: 6px;
    }

    .pfca-cover {
        margin: 32px 0 40px;
    }

    .pfca-prose {
        padding-top: 40px;
    }

    .pfca-article-template--theme-hero .pfca-cover {
        margin-top: 0;
    }

    .pfca-article-template--theme-hero .pfca-prose {
        padding-top: 0;
    }

    .pfca-article-template .pfca-prose h2 {
        margin-top: 58px;
        font-size: 28px;
    }

    .pfca-article-template .pfca-prose h3 {
        margin-top: 40px;
        font-size: 21px;
    }

    .pfca-prose p {
        font-size: 16px;
        line-height: 1.9;
    }

    .pfca-prose blockquote {
        padding: 20px;
    }

    .pfca-related {
        margin-top: 32px;
        padding: 40px 20px;
    }

    .pfca-comments {
        margin-top: 32px;
        padding: 24px 20px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .pfca-toc-drawer,
    .pfca-drawer-scrim,
    .pfca-related__image img {
        transition: none;
    }
}

@media print {
    .pfca-progress,
    .pfca-toc,
    .pfca-toc-toggle,
    .pfca-toc-drawer,
    .pfca-drawer-scrim,
    .pfca-related {
        display: none !important;
    }

    .pfca-article-template,
    .pfca-layout {
        padding: 0;
        border: 0;
        background: #fff;
        box-shadow: none;
    }
}