/* ===== Detail Page ===== */

/* Breadcrumb */
.breadcrumb {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    z-index: 999;
    background: rgba(10, 22, 40, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(0, 180, 216, 0.08);
    padding: 10px 0;
}
.breadcrumb-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.breadcrumb-inner a {
    color: var(--text-muted);
    font-size: 0.85rem;
    transition: var(--transition);
}
.breadcrumb-inner a:hover { color: var(--accent-cyan); }
.breadcrumb-sep {
    color: var(--text-muted);
    font-size: 0.8rem;
    opacity: 0.5;
}
.breadcrumb-current {
    color: var(--accent-cyan);
    font-size: 0.85rem;
    font-weight: 600;
}

/* Detail Hero */
.detail-hero {
    position: relative;
    padding: 140px 24px 80px;
    background: linear-gradient(180deg, #0a1628 0%, #0d2f5e 50%, var(--bg-secondary) 100%);
    overflow: hidden;
}
.detail-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 60%, rgba(0, 180, 216, 0.08) 0%, transparent 60%);
}
.detail-hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}
.detail-category {
    display: inline-block;
    padding: 6px 22px;
    background: rgba(0, 180, 216, 0.1);
    border: 1px solid rgba(0, 180, 216, 0.2);
    color: var(--accent-cyan);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
}
.detail-title {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.detail-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto;
}

/* Detail Main Layout */
.detail-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px 80px;
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 48px;
}

/* Table of Contents */
.detail-toc {
    position: sticky;
    top: 120px;
    align-self: start;
    max-height: calc(100vh - 160px);
    overflow-y: auto;
    padding-right: 16px;
    border-right: 1px solid rgba(0, 180, 216, 0.08);
}
.toc-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
}
.toc-list { display: flex; flex-direction: column; gap: 4px; }
.toc-link {
    display: block;
    padding: 8px 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-radius: 6px;
    transition: var(--transition);
    border-left: 2px solid transparent;
}
.toc-link:hover,
.toc-link.active {
    color: var(--accent-cyan);
    background: rgba(0, 180, 216, 0.08);
    border-left-color: var(--accent-cyan);
}

/* Article Body */
.detail-body { min-width: 0; }
.detail-body h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 48px 0 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(0, 180, 216, 0.15);
    color: var(--text-primary);
}
.detail-body h2:first-child { margin-top: 0; }
.detail-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 32px 0 12px;
    color: var(--accent-cyan);
}
.detail-body p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.9;
    margin-bottom: 16px;
    text-align: justify;
}
.detail-body ul,
.detail-body ol {
    margin: 0 0 20px 20px;
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.9;
}
.detail-body ul li,
.detail-body ol li {
    margin-bottom: 8px;
    padding-left: 4px;
}
.detail-body ul li::marker { color: var(--accent-cyan); }
.detail-body strong { color: var(--text-primary); font-weight: 600; }
.detail-body blockquote {
    border-left: 4px solid var(--accent-cyan);
    padding: 16px 24px;
    margin: 24px 0;
    background: var(--gradient-card);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--text-secondary);
    font-style: italic;
}
.detail-body .highlight-box {
    padding: 24px;
    margin: 24px 0;
    background: rgba(0, 180, 216, 0.06);
    border: 1px solid rgba(0, 180, 216, 0.15);
    border-radius: var(--radius-md);
}
.detail-body .highlight-box h4 {
    color: var(--accent-cyan);
    margin-bottom: 8px;
    font-size: 1rem;
}
.detail-body .highlight-box p { margin-bottom: 0; }

/* Related Section */
.related-section {
    background: var(--bg-secondary);
    padding: 80px 24px;
}
.related-container {
    max-width: 1200px;
    margin: 0 auto;
}
.related-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 32px;
    text-align: center;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}
.related-card {
    background: var(--gradient-card);
    border: 1px solid rgba(0, 180, 216, 0.08);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
    display: block;
    color: inherit;
}
.related-card:hover {
    transform: translateY(-3px);
    border-color: rgba(0, 180, 216, 0.25);
    box-shadow: var(--shadow-glow);
}
.related-card-tag {
    font-size: 0.72rem;
    color: var(--accent-cyan);
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 8px;
}
.related-card h4 {
    font-size: 1.05rem;
    margin-bottom: 6px;
}
.related-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Responsive */
@media (max-width: 900px) {
    .detail-main {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .detail-toc {
        position: static;
        border-right: none;
        border-bottom: 1px solid rgba(0, 180, 216, 0.08);
        padding-bottom: 16px;
        max-height: none;
    }
    .toc-list { flex-direction: row; flex-wrap: wrap; gap: 6px; }
    .toc-link {
        border-left: none;
        border-radius: 50px;
        padding: 6px 14px;
        font-size: 0.8rem;
    }
    .detail-title { font-size: 2rem; }
    .detail-hero { padding: 120px 20px 60px; }
    .detail-body h2 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
    .detail-title { font-size: 1.6rem; }
    .detail-hero { padding: 100px 16px 40px; }
    .detail-body h2 { font-size: 1.3rem; }
    .detail-body p { font-size: 0.95rem; }
    .breadcrumb-inner { padding: 0 16px; font-size: 0.8rem; }
}