/* article.css - 文章页专属样式 */

.article-main {
    padding-top: calc(var(--nav-height) + 40px);
    padding-bottom: 80px;
    background: var(--color-bg);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--color-text-light);
    margin-bottom: 32px;
}
.breadcrumb a { color: var(--color-primary); }
.breadcrumb a:hover { text-decoration: underline; }

.article-body { max-width: 780px; margin: 0 auto; }

/* Header */
.article-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.article-tag-pill {
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 12px; font-weight: 600;
    padding: 4px 12px; border-radius: 20px;
}

.article-body h1 {
    font-size: 28px; font-weight: 800;
    color: var(--color-dark); line-height: 1.4;
    margin-bottom: 16px; letter-spacing: -0.5px;
}

.article-info {
    display: flex; gap: 20px; flex-wrap: wrap;
    font-size: 13px; color: var(--color-text-light);
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 32px;
}
.article-info i { margin-right: 4px; }

/* Lead */
.article-lead {
    font-size: 18px; line-height: 1.8;
    color: var(--color-text);
    font-weight: 500;
    border-left: 4px solid var(--color-primary);
    padding-left: 20px;
    margin-bottom: 32px;
}

/* Figure */
.article-figure { margin: 32px 0; }
.article-figure img {
    width: 100%; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}
.article-figure figcaption {
    text-align: center; font-size: 13px;
    color: var(--color-text-light); margin-top: 10px;
}

/* Body text */
.article-body p {
    font-size: 16px; line-height: 1.9;
    color: var(--color-text); margin-bottom: 20px;
}

.article-body h2 {
    font-size: 22px; font-weight: 700;
    color: var(--color-dark);
    margin: 40px 0 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-primary-light);
}

.article-body h3 {
    font-size: 18px; font-weight: 700;
    color: var(--color-dark); margin: 28px 0 12px;
}

.article-body ul {
    list-style: none; margin-bottom: 20px;
    display: flex; flex-direction: column; gap: 10px;
}

.article-body ul li {
    font-size: 15px; line-height: 1.8;
    color: var(--color-text);
    padding-left: 20px; position: relative;
}

.article-body ul li::before {
    content: '▸';
    position: absolute; left: 0;
    color: var(--color-primary); font-size: 14px;
}

/* Callout */
.article-callout {
    display: flex; gap: 16px; align-items: flex-start;
    background: var(--color-primary-light);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 20px 24px; margin: 28px 0;
}
.article-callout i { font-size: 20px; color: var(--color-primary); flex-shrink: 0; margin-top: 2px; }
.article-callout p { margin: 0; font-size: 15px; }

/* Efficiency bar */
.article-efficiency {
    display: flex; align-items: center; gap: 12px;
    background: var(--color-dark);
    color: white; padding: 14px 20px;
    border-radius: var(--radius-md); margin: 16px 0 28px;
    font-size: 14px;
}
.article-efficiency i { color: var(--color-primary); font-size: 18px; flex-shrink: 0; }

/* Steps */
.article-steps { display: flex; flex-direction: column; gap: 16px; margin: 24px 0; }
.article-step {
    display: flex; gap: 20px; align-items: flex-start;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md); padding: 20px;
}
.step-num {
    font-size: 28px; font-weight: 800;
    color: var(--color-primary); line-height: 1;
    flex-shrink: 0; width: 48px; text-align: center;
}
.step-content strong { display: block; font-size: 16px; color: var(--color-dark); margin-bottom: 6px; }
.step-content p { font-size: 14px; color: var(--color-text-light); margin: 0; }

/* Benefits */
.article-benefits { display: flex; flex-direction: column; gap: 16px; margin: 24px 0; }
.benefit-item {
    display: flex; gap: 16px; align-items: flex-start;
    padding: 20px; background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}
.benefit-item:hover { border-color: var(--color-primary); box-shadow: var(--shadow-sm); }
.benefit-icon {
    width: 48px; height: 48px; flex-shrink: 0;
    border-radius: 14px;
    background: var(--color-primary-light);
    display: flex; align-items: center; justify-content: center;
    font-size: 20px; color: var(--color-primary);
}
.benefit-item strong { display: block; font-size: 16px; color: var(--color-dark); margin-bottom: 4px; }
.benefit-item p { font-size: 14px; color: var(--color-text-light); margin: 0; }

/* Conclusion */
.article-conclusion {
    background: linear-gradient(135deg, var(--color-dark), #252545);
    color: white; padding: 36px 32px;
    border-radius: var(--radius-lg); margin: 40px 0;
}
.article-conclusion p { color: rgba(255,255,255,0.85); font-size: 16px; margin-bottom: 12px; }
.article-conclusion p:last-child { margin-bottom: 0; }

/* Author CTA */
.article-author-cta {
    display: flex; gap: 20px; align-items: flex-start;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); padding: 28px;
    margin-top: 40px;
}
.author-cta-avatar {
    width: 60px; height: 60px; flex-shrink: 0;
    border-radius: 50%;
    background: var(--color-primary-light);
    display: flex; align-items: center; justify-content: center;
    font-size: 26px; color: var(--color-primary);
}
.author-cta-name { font-size: 16px; font-weight: 700; color: var(--color-dark); margin-bottom: 6px; }
.author-cta-content p { font-size: 14px; color: var(--color-text-light); margin-bottom: 16px; }
.author-cta-btns { display: flex; gap: 12px; flex-wrap: wrap; }

.btn-sm { padding: 10px 22px !important; font-size: 14px !important; }
.btn-secondary-dark {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 22px; font-size: 14px; font-weight: 600;
    border-radius: 50px; background: var(--color-dark);
    color: white; border: none; cursor: pointer; transition: var(--transition);
}
.btn-secondary-dark:hover { background: #252545; transform: translateY(-1px); }

/* Nav bottom */
.article-nav-bottom { max-width: 780px; margin: 40px auto 0; }
.back-link {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 15px; font-weight: 500;
    color: var(--color-primary);
}
.back-link:hover { text-decoration: underline; }

/* Responsive */
@media (max-width: 768px) {
    .article-body h1 { font-size: 22px; }
    .article-body h2 { font-size: 19px; }
    .article-lead { font-size: 16px; }
    .article-author-cta { flex-direction: column; }
    .article-step { flex-direction: column; gap: 8px; }
    .step-num { width: auto; }
}