/* 文章页面专用样式 */

.article-page {
    padding-top: 100px;
    min-height: 100vh;
    background: var(--bg-light);
}

.article-header {
    background: white;
    padding: 40px;
    border-radius: 20px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-md);
}

.article-breadcrumb {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 20px;
}

.article-breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
}

.article-breadcrumb a:hover {
    text-decoration: underline;
}

.article-header h1 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 20px;
    line-height: 1.3;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
    font-size: 0.95rem;
    color: var(--text-light);
}

.article-featured-image {
    width: 100%;
    height: 400px;
    border-radius: 15px;
    overflow: hidden;
}

.article-featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-body {
    background: white;
    padding: 50px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    line-height: 1.9;
}

.article-body .lead {
    font-size: 1.2rem;
    color: var(--text-dark);
    line-height: 1.8;
    margin-bottom: 30px;
    padding: 20px;
    background: rgba(99, 102, 241, 0.05);
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
}

.article-body h2 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-top: 50px;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.article-body h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-top: 35px;
    margin-bottom: 20px;
}

.article-body p {
    margin-bottom: 20px;
    color: var(--text-dark);
}

.article-body ul, .article-body ol {
    margin: 20px 0;
    padding-left: 30px;
}

.article-body li {
    margin-bottom: 12px;
    color: var(--text-dark);
}

.article-body strong {
    color: var(--primary-color);
    font-weight: 600;
}

.article-body a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease;
}

.article-body a:hover {
    border-bottom-color: var(--primary-color);
}

.article-cta {
    background: var(--gradient-1);
    color: white;
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    margin: 50px 0;
}

.article-cta h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    margin-top: 0;
}

.article-cta p {
    font-size: 1.1rem;
    margin-bottom: 25px;
    opacity: 0.9;
}

.article-cta .btn-primary {
    background: white;
    color: var(--primary-color);
}

.article-faq {
    margin: 60px 0;
    padding: 40px;
    background: var(--bg-light);
    border-radius: 15px;
}

.article-faq h2 {
    text-align: center;
    margin-bottom: 40px;
    margin-top: 0;
    border-bottom: none;
}

.related-articles {
    margin-top: 60px;
    padding-top: 60px;
    border-top: 2px solid var(--border-color);
}

.related-articles h2 {
    text-align: center;
    margin-bottom: 40px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.related-card {
    background: var(--bg-light);
    border-radius: 15px;
    overflow: hidden;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.related-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.related-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.related-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.related-card:hover .related-image img {
    transform: scale(1.1);
}

.related-card h3 {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin: 20px 20px 10px;
}

.related-card p {
    font-size: 0.95rem;
    color: var(--text-light);
    margin: 0 20px 20px;
}

/* 响应式 */
@media (max-width: 768px) {
    .article-header {
        padding: 30px 20px;
    }

    .article-header h1 {
        font-size: 1.8rem;
    }

    .article-featured-image {
        height: 250px;
    }

    .article-body {
        padding: 30px 20px;
    }

    .article-body h2 {
        font-size: 1.6rem;
        margin-top: 35px;
    }

    .article-body h3 {
        font-size: 1.3rem;
    }

    .related-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== SEO 文章强化组件样式 ========== */

/* 核心要点速览 Callout Box */
.callout-box {
    margin: 30px 0;
    padding: 24px;
    border-radius: 12px;
    background: #f8fafc;
    border-left: 5px solid var(--primary-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.callout-box.tip {
    background: #f0fdf4;
    border-left-color: #10b981;
}
.callout-box.warning {
    background: #fffbeb;
    border-left-color: #f59e0b;
}
.callout-box.info {
    background: #eff6ff;
    border-left-color: #3b82f6;
}
.callout-title {
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-dark);
}

/* 目录引导 TOC */
.article-toc {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 24px;
    margin: 30px 0;
}
.article-toc h3 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 1.15rem;
    color: #1e293b;
    display: flex;
    align-items: center;
    gap: 8px;
}
.article-toc ul {
    margin: 0;
    padding-left: 20px;
}
.article-toc li {
    margin-bottom: 8px;
    line-height: 1.5;
}
.article-toc a {
    color: #475569;
    text-decoration: none;
    transition: color 0.2s;
}
.article-toc a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* 步骤指示卡片 */
.step-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 24px;
    margin: 20px 0;
    position: relative;
    box-shadow: 0 2px 6px rgba(0,0,0,0.03);
}
.step-number {
    display: inline-block;
    width: 28px;
    height: 28px;
    background: var(--primary-color);
    color: #ffffff;
    border-radius: 50%;
    text-align: center;
    line-height: 28px;
    font-weight: 700;
    font-size: 0.9rem;
    margin-right: 8px;
}

/* 文章内部内链高亮 */
.article-body a.internal-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 3px;
    padding: 1px 3px;
    border-radius: 4px;
    transition: background 0.2s ease;
}
.article-body a.internal-link:hover {
    background: rgba(99, 102, 241, 0.1);
}

/* 文章FAQ折叠效果 */
.article-faq .faq-item {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
}
.article-faq .faq-question {
    padding: 18px 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    font-weight: 600;
}
.article-faq .faq-question h3 {
    margin: 0;
    font-size: 1.05rem;
    color: var(--text-dark);
}
.article-faq .faq-toggle {
    font-size: 1.3rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}
.article-faq .faq-item.active .faq-toggle {
    transform: rotate(45deg);
}
.article-faq .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 20px;
    color: #4b5563;
    line-height: 1.8;
}
.article-faq .faq-item.active .faq-answer {
    max-height: 600px;
    padding: 0 20px 20px 20px;
}

/* 审校与作者元数据 */
.article-reviewer-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #f1f5f9;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: #475569;
    margin-top: 15px;
}