/* ========== 文章页面独有样式（已移除 featured-image） ========== */
.article-hero {
    background: white;
    padding: 60px 0 40px;
    border-bottom: 1px solid #eef2ff;
}
.article-header {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}
.article-category {
    display: inline-block;
    background: #F1F5F9;
    padding: 6px 16px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 500;
    color: #D4AF37;
    margin-bottom: 20px;
}
.article-header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: #0A2647;
    line-height: 1.2;
    margin-bottom: 20px;
}
.article-meta {
    display: flex;
    justify-content: center;
    gap: 24px;
    color: #64748b;
    font-size: 0.9rem;
    margin-bottom: 30px;
}
.article-meta i {
    margin-right: 6px;
    color: #D4AF37;
}

/* 文章主体 (无侧边栏，全宽) */
.article-body {
    max-width: 860px;
    margin: 0 auto;
    padding: 48px 0;
}
/* 文章内文字样式 */
.article-body h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 1.5em 0 0.5em;
    color: #0A2647;
}
.article-body h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin: 1.4em 0 0.5em;
    color: #1E293B;
}
.article-body h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 1.2em 0 0.4em;
    color: #334155;
}
.article-body h5 {
    font-size: 1rem;
    font-weight: 600;
    margin: 1em 0 0.3em;
    color: #475569;
}
.article-body p {
    margin-bottom: 1.2em;
    line-height: 1.7;
    color: #334155;
}
.article-body img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 2rem auto;
    border-radius: 24px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.05);
}
.article-body ul, .article-body ol {
    margin: 1em 0 1.5em 2em;
    color: #334155;
}
.article-body li {
    margin-bottom: 0.5em;
}
.article-body blockquote {
    border-left: 4px solid #D4AF37;
    background: #F8FAFC;
    padding: 1.2em 2em;
    margin: 1.5em 0;
    font-style: italic;
    color: #1E293B;
    border-radius: 16px;
}

/* 上一篇/下一篇导航 */
.post-nav {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    border-top: 1px solid #eef2ff;
    border-bottom: 1px solid #eef2ff;
    padding: 32px 0;
    margin: 40px 0;
}
.nav-prev, .nav-next {
    flex: 1;
    max-width: 48%;
}
.nav-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #64748b;
    margin-bottom: 8px;
}
.nav-title {
    font-weight: 600;
    color: #0A2647;
    transition: color 0.2s;
}
.nav-title:hover {
    color: #D4AF37;
}
.nav-next {
    text-align: right;
}

/* 相关文章网格 */
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 40px;
}
.related-card {
    background: white;
    border-radius: 28px;
    overflow: hidden;
    transition: 0.3s;
    border: 1px solid #eef2ff;
}
.related-card:hover {
    transform: translateY(-6px);
    border-color: #D4AF37;
    box-shadow: 0 20px 30px -10px rgba(0,0,0,0.1);
}

.related-card img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    display: block;
}
.related-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}
.related-content {
    padding: 20px;
}
.related-title {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 8px;
}
.related-title a {
    color: #0A2647;
    text-decoration: none;
}
.related-title a:hover {
    color: #D4AF37;
}
.related-date {
    font-size: 0.75rem;
    color: #64748b;
}

@media (max-width: 768px) {
    .article-header h1 {
        font-size: 2rem;
    }
    .article-body {
        padding: 32px 0;
    }
    .post-nav {
        flex-direction: column;
        gap: 20px;
    }
    .nav-prev, .nav-next {
        max-width: 100%;
        text-align: left;
    }
    .nav-next {
        text-align: left;
    }
}