/* WordPress 文章展示 - 统一样式表（使用 CSS 变量，由 themes.css 注入）
   所有颜色均通过 var(--xxx) 使用，不硬编码颜色值
*/
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=DM+Sans:wght@300;400;500;600&display=swap');

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

/* ── Site Header ── */
.site-header {
    background: var(--bg-base);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: color-mix(in srgb, var(--bg-base) 92%, transparent);
}

.header-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 2rem;
}

.site-brand {
    display: flex;
    flex-direction: column;
    gap: 0;
    text-decoration: none;
    flex-shrink: 0;
    align-items: center;
}

.site-logo {
    height: 40px;
    width: auto;
    object-fit: contain;
    display: block;
    margin-right: 0.75rem;
    flex-shrink: 0;
}

.site-brand .site-name {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.site-brand .site-tagline {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-weight: 300;
}

.header-actions { display: flex; align-items: center; gap: 0.5rem; }

/* ── Category Navigation ── */
.category-nav {
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-subtle);
}

.category-nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    gap: 0;
    overflow-x: auto;
    scrollbar-width: none;
    height: 44px;
}

.category-nav-inner::-webkit-scrollbar { display: none; }

.category-nav .nav-item {
    padding: 0 1.1rem;
    height: 100%;
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    white-space: nowrap;
    position: relative;
    transition: color 0.2s;
}

.category-nav .nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.25s ease;
}

.category-nav .nav-item:hover { color: var(--text-primary); }
.category-nav .nav-item:hover::after,
.category-nav .nav-item.active::after { width: calc(100% - 2.2rem); }
.category-nav .nav-item.active { color: var(--accent); font-weight: 500; }

/* ── Buttons ── */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 0.45rem 1.1rem; border-radius: 4px; font-size: 0.82rem;
    font-weight: 500; text-decoration: none; transition: all 0.2s;
    cursor: pointer; border: none; font-family: var(--font-body);
    letter-spacing: 0.02em;
}
.btn-primary { background: var(--accent); color: var(--bg-base); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-text { background: transparent; color: var(--text-secondary); padding: 0.45rem 0.75rem; }
.btn-text:hover { color: var(--accent); }

/* ── Main Content ── */
.main-content {
    flex: 1; max-width: 1200px; width: 100%;
    margin: 0 auto; padding: 2.5rem 2rem 3rem;
}

.page-title {
    font-family: var(--font-display);
    font-size: 1.5rem; font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem; letter-spacing: -0.01em;
}

.page-subtitle { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 2rem; }
.list-header { margin-bottom: 2rem; }

/* ── Search Form ── */
.search-form {
    display: flex; gap: 0.75rem; align-items: center;
    margin-bottom: 2rem; flex-wrap: wrap;
}
.search-form input[type="text"] {
    flex: 1; min-width: 220px;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: 4px; padding: 0.65rem 1rem;
    color: var(--text-primary); font-size: 0.9rem; font-family: var(--font-body);
    transition: border-color 0.2s;
}
.search-form input[type="text"]:focus { outline: none; border-color: var(--accent); }
.search-form input[type="text"]::placeholder { color: var(--text-muted); }
.result-count { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 1.25rem; letter-spacing: 0.03em; }

/* ── Filter ── */
.filter-form {
    background: var(--bg-elevated); border: 1px solid var(--border);
    border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 2rem;
    display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center;
}
.filter-form select, .filter-form input[type="text"] {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: 4px; padding: 0.5rem 0.875rem;
    color: var(--text-primary); font-size: 0.85rem; font-family: var(--font-body);
    min-width: 120px; transition: border-color 0.2s;
}
.filter-form select:focus, .filter-form input[type="text"]:focus { outline: none; border-color: var(--accent); }
.filter-form select option { background: var(--bg-card); }
.filter-form input[type="text"] { flex: 1; min-width: 180px; }

/* ── Post Grid ── */
.post-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.post-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: 8px; overflow: hidden;
    transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
    display: flex; flex-direction: column;
}
.post-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 12px 40px color-mix(in srgb, var(--bg-base) 60%, transparent);
}

.post-thumbnail { width: 100%; height: 190px; overflow: hidden; background: var(--bg-elevated); }
.post-thumbnail img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.post-card:hover .post-thumbnail img { transform: scale(1.06); }

.post-body { padding: 1.25rem; display: flex; flex-direction: column; flex: 1; gap: 0.5rem; }

.post-category {
    font-size: 0.7rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent);
}

.post-title {
    font-family: var(--font-display); font-size: 1.05rem; font-weight: 600;
    line-height: 1.45; color: var(--text-primary);
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden; transition: color 0.2s;
}
.post-card:hover .post-title { color: var(--accent); }

.post-excerpt {
    font-size: 0.82rem; color: var(--text-secondary); line-height: 1.65; flex: 1;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}

.post-meta {
    display: flex; justify-content: space-between; align-items: center;
    font-size: 0.75rem; color: var(--text-muted);
    padding-top: 0.75rem; border-top: 1px solid var(--border-subtle); margin-top: auto;
}

/* ── Pagination ── */
.pagination {
    display: flex; justify-content: center; align-items: center;
    gap: 0.5rem; margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--border);
}
.pagination a, .pagination span { padding: 0.5rem 1rem; border-radius: 4px; font-size: 0.85rem; text-decoration: none; transition: all 0.2s; }
.pagination a { background: var(--bg-card); border: 1px solid var(--border); color: var(--text-secondary); }
.pagination a:hover { border-color: var(--accent); color: var(--accent); }
.pagination .current { background: var(--accent-dim); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); color: var(--accent); font-weight: 500; }

/* ── Empty State ── */
.empty-state { text-align: center; padding: 5rem 2rem; color: var(--text-muted); }
.empty-state p { font-size: 1rem; margin-bottom: 1.25rem; }

/* ── Article Page ── */
.article-header { margin-bottom: 2.5rem; padding-bottom: 2rem; border-bottom: 1px solid var(--border); }

.article-category {
    font-size: 0.72rem; font-weight: 600; letter-spacing: 0.12em;
    text-transform: uppercase; color: var(--accent); margin-bottom: 1rem;
}

.article-title {
    font-family: var(--font-display); font-size: 2.4rem; font-weight: 700;
    line-height: 1.25; color: var(--text-primary);
    margin-bottom: 1.25rem; letter-spacing: -0.02em;
}

.article-meta {
    display: flex; flex-wrap: wrap; gap: 1.5rem; align-items: center;
    font-size: 0.82rem; color: var(--text-muted);
}

.article-content {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: 8px; padding: 2.5rem; margin-bottom: 2rem;
    font-size: 1rem; line-height: 1.85;
}
.article-content img { max-width: 100%; height: auto; border-radius: 6px; margin: 1.5rem 0; border: 1px solid var(--border); }
.article-content video { max-width: 100%; border-radius: 6px; margin: 1.5rem 0; }
.article-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--accent-hover); }
.article-content p { margin-bottom: 1.25rem; }
.article-content h2, .article-content h3, .article-content h4 { margin: 2rem 0 1rem; font-family: var(--font-display); color: var(--text-primary); }
.article-content h2 { font-size: 1.5rem; }
.article-content h3 { font-size: 1.25rem; }
.article-content h4 { font-size: 1.1rem; }
.article-content blockquote { border-left: 3px solid var(--accent); padding: 0.75rem 1.25rem; margin: 1.5rem 0; background: var(--accent-dim); border-radius: 0 4px 4px 0; font-style: italic; color: var(--text-secondary); }
.article-content ul, .article-content ol { padding-left: 1.5rem; margin-bottom: 1.25rem; }
.article-content li { margin-bottom: 0.4rem; }

.article-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.btn-read-original { flex: 1; min-width: 180px; padding: 0.875rem 1.5rem; font-size: 0.9rem; text-align: center; }
.btn-back { padding: 0.875rem 1.5rem; font-size: 0.9rem; }

/* ── Adjacent Post Navigation ── */
.adjacent-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}
.adjacent-prev { text-align: left; }
.adjacent-next { text-align: right; }
.adjacent-link { display: flex; flex-direction: column; gap: 0.3rem; text-decoration: none; padding: 0.875rem 1rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: 6px; transition: border-color 0.2s; }
.adjacent-next .adjacent-link { text-align: right; }
.adjacent-link:hover { border-color: var(--accent); }
.adjacent-label { font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.06em; font-weight: 500; text-transform: uppercase; }
.adjacent-title { font-size: 0.9rem; color: var(--text-primary); font-family: var(--font-display); line-height: 1.4; }

/* ── Footer ── */
.site-footer {
    background: var(--bg-elevated); border-top: 1px solid var(--border);
    text-align: center; padding: 2rem;
    color: var(--text-muted); font-size: 0.78rem; margin-top: auto; letter-spacing: 0.02em;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Responsive ── */
@media (max-width: 768px) {
    .header-main { padding: 0 1rem; height: 58px; }
    .category-nav-inner { padding: 0 1rem; }
    .main-content { padding: 1.5rem 1rem 2rem; }
    .post-grid { grid-template-columns: 1fr; }
    .article-title { font-size: 1.7rem; }
    .article-content { padding: 1.5rem; }
    .filter-form { flex-direction: column; align-items: stretch; }
    .filter-form select, .filter-form input[type="text"] { width: 100%; }
    .site-brand .site-name { font-size: 1.2rem; }
    .adjacent-nav { grid-template-columns: 1fr; }
    .adjacent-next { text-align: left; }
    .adjacent-next .adjacent-link { text-align: left; }
}