/* ═══════════════════════════════════════════════════════════════
   ARTICLE DETAIL PAGE — Editorial Design System
   ═══════════════════════════════════════════════════════════════ */

/* ── Reading Progress Bar ── */
.reading-progress {
    position: fixed;
    top: 0; left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--brand-500), var(--accent-400));
    z-index: 1100;
    transition: width 0.1s linear;
    border-radius: 0 2px 2px 0;
}

/* ── Hero Overrides for Article ── */
.page-article .page-hero {
    /* article hero uses unified hero, no min-height override needed */
}
.page-article .page-hero__content {
    /* inherits unified hero flexbox */
}
.page-article .hero-question {
    text-align: left;
    align-items: flex-start;
}
.page-article .page-hero__title {
    text-align: left;
    font-size: clamp(1.5rem, 3.5vw, 2.25rem);
    max-width: 800px;
}
.page-article .page-hero__subtitle {
    display: none; /* Remove excerpt from hero */
}
.page-article .page-hero .breadcrumb {
    justify-content: flex-start;
}

/* ── Hero Meta Bar ── */
.article-hero-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--sp-3);
    margin-top: var(--sp-4);
    font-size: 0.8125rem;
    color: rgba(255,255,255,0.5);
}
.article-hero-meta__author {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: rgba(255,255,255,0.7);
    font-weight: 500;
}
.article-hero-meta__author i {
    font-size: 11px;
    opacity: 0.6;
}
.article-hero-meta__sep {
    width: 3px; height: 3px;
    border-radius: 50%;
    background: rgba(255,255,255,0.25);
    flex-shrink: 0;
}
.article-hero-meta__reading {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.article-hero-meta__reading i {
    font-size: 11px;
    opacity: 0.5;
}

/* ── Two-Column Layout ── */
.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 720px) 280px;
    gap: var(--sp-12);
    max-width: 1080px;
    margin: 0 auto;
    padding: var(--sp-16) var(--sp-8) var(--sp-20);
}

/* ── Featured Image ── */
.article-featured-img {
    width: 100%;
    border-radius: var(--r-lg);
    margin-bottom: var(--sp-10);
    box-shadow: var(--shadow-md);
}

/* ── Article Body ── */
.article-body {
    line-height: 1.85;
    font-size: 1rem;
    color: var(--gray-700);
    max-width: 720px;
}
.article-body h2 {
    font-size: 1.375rem;
    margin: var(--sp-10) 0 var(--sp-4);
}
.article-body h3 {
    font-size: 1.125rem;
    margin: var(--sp-8) 0 var(--sp-3);
}
.article-body h4 {
    font-size: 1rem;
    margin: var(--sp-6) 0 var(--sp-2);
}
.article-body h6 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: var(--sp-8) 0 var(--sp-3);
    color: var(--gray-800);
}
.article-body p {
    margin-bottom: var(--sp-5);
}
.article-body img {
    border-radius: var(--r-lg);
    margin: var(--sp-6) 0;
}
.article-body ul, .article-body ol {
    margin: var(--sp-4) 0 var(--sp-5);
    padding-left: var(--sp-6);
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li {
    margin-bottom: var(--sp-2);
    line-height: 1.75;
    color: var(--gray-600);
}
.article-body a {
    color: var(--brand-600);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--dur);
}
.article-body a:hover {
    color: var(--brand-500);
}
.article-body strong {
    color: var(--gray-800);
    font-weight: 600;
}
.article-body em {
    color: var(--gray-500);
}
.article-body code {
    background: var(--gray-100);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.875em;
    color: var(--brand-700);
}
.article-body pre {
    background: var(--brand-950);
    color: var(--gray-300);
    padding: var(--sp-6);
    border-radius: var(--r-lg);
    overflow-x: auto;
    margin: var(--sp-6) 0;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
}

/* ── Drop Cap ── */
.article-body > p:first-of-type::first-letter {
    float: left;
    font-family: var(--font-display);
    font-size: 3.25em;
    line-height: 0.85;
    font-weight: 800;
    color: var(--brand-600);
    margin: 0.05em 0.12em 0 0;
}
/* Disable drop cap for CJK */
html[lang="zh-Hans"] .article-body > p:first-of-type::first-letter,
html[lang="zh-Hant"] .article-body > p:first-of-type::first-letter,
html[lang="ja"] .article-body > p:first-of-type::first-letter {
    float: none;
    font-size: inherit;
    line-height: inherit;
    font-weight: inherit;
    color: inherit;
    margin: 0;
}

/* ── Blockquote / Pull Quote ── */
.article-body blockquote {
    position: relative;
    border-left: none;
    padding: var(--sp-6) var(--sp-8);
    margin: var(--sp-8) 0;
    background: linear-gradient(135deg, var(--brand-50), var(--gray-50));
    border-radius: var(--r-lg);
    border: 1px solid var(--brand-100);
}
.article-body blockquote::before {
    content: '\201C';
    position: absolute;
    top: -8px; left: 16px;
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--brand-300);
    line-height: 1;
}
.article-body blockquote p {
    font-size: 1.0625rem;
    font-style: italic;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 0;
}
.article-body blockquote p:last-child {
    margin-bottom: 0;
}

/* ── External Link Enhancement ── */
.article-body a[data-external] {
    text-decoration: none;
    display: inline;
    padding: 1px 6px 1px 4px;
    background: var(--brand-50);
    border: 1px solid var(--brand-100);
    border-radius: 4px;
    font-size: 0.9375em;
    transition: all var(--dur) var(--ease);
    word-break: break-all;
}
.article-body a[data-external]:hover {
    background: var(--brand-100);
    border-color: var(--brand-200);
}
.article-body a[data-external]::after {
    content: '\f35d'; /* fa-up-right-from-square */
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 0.6875em;
    margin-left: 4px;
    opacity: 0.5;
}

/* ── Sidebar ── */
.article-sidebar {
    position: sticky;
    top: calc(var(--header-h, 72px) + var(--sp-8));
    align-self: start;
    display: flex;
    flex-direction: column;
    gap: var(--sp-8);
}

.sidebar-section {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--r-lg);
    padding: var(--sp-6);
}
.sidebar-section__title {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--gray-500);
    margin-bottom: var(--sp-4);
    display: flex;
    align-items: center;
    gap: 6px;
}
.sidebar-section__title i {
    font-size: 12px;
    color: var(--brand-500);
}

/* Sidebar: Recent Articles */
.sidebar-article {
    display: block;
    padding: var(--sp-3) 0;
    border-bottom: 1px solid var(--gray-200);
    transition: all var(--dur);
}
.sidebar-article:last-child { border-bottom: none; }
.sidebar-article:hover { padding-left: var(--sp-2); }
.sidebar-article__cat {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--brand-500);
    margin-bottom: 2px;
}
.sidebar-article__title {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--gray-700);
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.sidebar-article:hover .sidebar-article__title { color: var(--brand-600); }

/* Sidebar: Media Contact */
.sidebar-contact p {
    font-size: 0.8125rem;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: var(--sp-2);
}
.sidebar-contact a {
    color: var(--brand-600);
    font-weight: 500;
}

/* Sidebar: Tags */
.sidebar-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-2);
}
.sidebar-tag {
    display: inline-block;
    padding: 3px 10px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--r-full);
    font-size: 0.75rem;
    color: var(--gray-600);
    transition: all var(--dur);
}
.sidebar-tag:hover {
    border-color: var(--brand-300);
    color: var(--brand-600);
    background: var(--brand-50);
}

/* ── Article Footer ── */
.article-footer {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 var(--sp-8) var(--sp-16);
}
.article-footer__inner {
    border-top: 1px solid var(--gray-200);
    padding-top: var(--sp-8);
}

/* Share Buttons */
.share-bar {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    margin-bottom: var(--sp-8);
}
.share-bar__label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    border-radius: var(--r-md);
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-500);
    font-size: 14px;
    transition: all var(--dur);
    cursor: pointer;
}
.share-btn:hover {
    border-color: var(--brand-300);
    color: var(--brand-600);
    background: var(--brand-50);
}
.share-btn--copied {
    border-color: var(--green-500) !important;
    color: var(--green-500) !important;
    background: var(--green-50) !important;
}

/* Prev/Next Navigation */
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-4);
}
.article-nav__link {
    display: flex;
    flex-direction: column;
    gap: var(--sp-1);
    padding: var(--sp-5) var(--sp-6);
    border: 1px solid var(--gray-200);
    border-radius: var(--r-lg);
    transition: all var(--dur);
}
.article-nav__link:hover {
    border-color: var(--brand-300);
    background: var(--brand-50);
    box-shadow: var(--shadow-sm);
}
.article-nav__link--next {
    text-align: right;
}
.article-nav__dir {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--brand-500);
}
.article-nav__title {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-nav__link:hover .article-nav__title { color: var(--brand-600); }

/* ── Responsive ── */
@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: 1fr;
        max-width: 720px;
        gap: var(--sp-12);
    }
    .article-sidebar {
        position: static;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--sp-4);
    }
}
@media (max-width: 768px) {
    .page-article .page-hero {
        /* no min-height override needed */
    }
    .article-layout {
        padding: var(--sp-10) var(--sp-5) var(--sp-12);
    }
    .article-sidebar {
        grid-template-columns: 1fr;
    }
    .article-hero-meta {
        font-size: 0.75rem;
    }
    .article-footer {
        padding: 0 var(--sp-5) var(--sp-10);
    }
    .article-nav {
        grid-template-columns: 1fr;
    }
    .article-nav__link--next {
        text-align: left;
    }
    .article-body > p:first-of-type::first-letter {
        font-size: 2.75em;
    }
}
@media (max-width: 480px) {
    .share-bar { flex-wrap: wrap; }
}

/* ── Article Tags (below body) ── */
.article-tags {
    margin-top: var(--sp-8);
    padding-top: var(--sp-6);
    border-top: 1px solid var(--gray-200);
    display: flex;
    align-items: flex-start;
    gap: var(--sp-3);
    flex-wrap: wrap;
}
.article-tags__label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--gray-500);
    white-space: nowrap;
    padding-top: 4px;
}
.article-tags__label i { margin-right: 4px; }
.article-tags__list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.article-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--gray-50, #f8fafc);
    border: 1px solid var(--gray-200);
    border-radius: var(--r-full);
    font-size: 0.8125rem;
    color: var(--gray-600);
    transition: all 0.15s;
    cursor: default;
}
.article-tag:hover {
    border-color: var(--brand-300);
    color: var(--brand-600);
    background: var(--brand-50);
}