/* ============================================================ */
/* ===== 文章正文 ===== */
/* ============================================================ */
.article-detail {
    padding: 60px 0 80px;
    background: var(--white);
}
.article-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 48px;
    align-items: start;
}

/* 左侧正文 */
.article-content {
    max-width: 100%;
}
.article-content .featured-image {
    width: 100%;
    height: 360px;
    border-radius: var(--radius);
    background: url('https://images.unsplash.com/photo-1551288049-bebda4e38f71?w=1200&q=80') center center / cover no-repeat;
    margin-bottom: 32px;
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}
.article-content .featured-image .image-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px 24px 14px;
    background: linear-gradient(0deg, rgba(6, 32, 74, 0.50) 0%, transparent 100%);
    color: rgba(255, 255, 255, 0.70);
    font-size: 0.85rem;
    font-weight: 400;
}

.article-content .content-body {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.9;
}
.article-content .content-body p {
    margin-bottom: 20px;
}
.article-content .content-body h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--text-dark);
    margin: 40px 0 16px;
    line-height: 1.3;
}
.article-content .content-body h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin: 28px 0 12px;
    line-height: 1.4;
}
.article-content .content-body blockquote {
    border-left: 4px solid var(--blue-primary);
    padding: 16px 24px;
    margin: 24px 0;
    background: var(--off-white);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-style: italic;
    color: var(--text-dark);
    font-size: 1.05rem;
}
.article-content .content-body blockquote strong {
    color: var(--blue-primary);
}
.article-content .content-body ul {
    margin: 16px 0 24px;
    padding-left: 24px;
}
.article-content .content-body ul li {
    list-style: disc;
    margin-bottom: 8px;
    color: var(--text-secondary);
}
.article-content .content-body .content-image {
    width: 100%;
    border-radius: var(--radius);
    margin: 28px 0;
    overflow: hidden;
    box-shadow: 0 12px 40px -12px rgba(0, 0, 0, 0.08);
}
.article-content .content-body .content-image img {
    width: 100%;
    display: block;
}
.article-content .content-body .content-image .img-caption {
    padding: 12px 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
    background: var(--off-white);
    text-align: center;
}

/* 分享 */
.article-share {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px 0;
    border-top: 1px solid rgba(26, 95, 180, 0.06);
    border-bottom: 1px solid rgba(26, 95, 180, 0.06);
    margin-top: 32px;
}
.article-share span {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.95rem;
}
.article-share .share-icons {
    display: flex;
    gap: 10px;
}
.article-share .share-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--off-white);
    color: var(--text-secondary);
    transition: var(--transition);
    font-size: 1rem;
}
.article-share .share-icons a:hover {
    background: var(--blue-primary);
    color: #fff;
    transform: translateY(-2px);
}

/* 上一篇 / 下一篇 */
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 32px;
}
.article-nav .nav-item {
    padding: 20px 24px;
    border-radius: var(--radius);
    background: var(--off-white);
    border: 1px solid rgba(26, 95, 180, 0.04);
    transition: var(--transition);
}
.article-nav .nav-item:hover {
    border-color: rgba(43, 123, 230, 0.08);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}
.article-nav .nav-item .nav-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.article-nav .nav-item .nav-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-top: 4px;
    transition: var(--transition);
}
.article-nav .nav-item:hover .nav-title {
    color: var(--blue-primary);
}
.article-nav .nav-item.next {
    text-align: right;
}

/* ----- 侧边栏 ----- */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* 相关文章 */
.sidebar-related {
    background: var(--off-white);
    border-radius: var(--radius);
    padding: 20px 24px 24px;
    border: 1px solid rgba(26, 95, 180, 0.04);
}
.sidebar-related h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}
.sidebar-related h4 i {
    color: var(--blue-soft);
}
.sidebar-related .rel-item {
    display: flex;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(26, 95, 180, 0.04);
    align-items: flex-start;
}
.sidebar-related .rel-item:last-child {
    border-bottom: none;
}
.sidebar-related .rel-item .rel-thumb {
    width: 72px;
    height: 60px;
    border-radius: 8px;
    background-size: cover;
    background-position: center;
    flex-shrink: 0;
}
.sidebar-related .rel-item .rel-text {
    flex: 1;
}
.sidebar-related .rel-item .rel-text .rel-title {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-dark);
    line-height: 1.4;
    transition: var(--transition);
}
.sidebar-related .rel-item .rel-text .rel-title:hover {
    color: var(--blue-primary);
}
.sidebar-related .rel-item .rel-text .rel-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* 热门标签 */
.sidebar-tags {
    background: var(--off-white);
    border-radius: var(--radius);
    padding: 20px 24px 24px;
    border: 1px solid rgba(26, 95, 180, 0.04);
}
.sidebar-tags h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}
.sidebar-tags h4 i {
    color: var(--blue-soft);
}
.sidebar-tags .tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.sidebar-tags .tag-cloud a {
    padding: 4px 14px;
    border-radius: 60px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--white);
    border: 1px solid rgba(26, 95, 180, 0.04);
    transition: var(--transition);
}
.sidebar-tags .tag-cloud a:hover {
    background: var(--blue-primary);
    color: #fff;
    border-color: var(--blue-primary);
    transform: translateY(-2px);
}

/* ----- CTA ----- */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(145deg, #06204a 0%, #0a3a7a 40%, #0f4a9a 100%);
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-section .glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
}
.cta-section .glow-orb:nth-child(1) {
    width: 300px;
    height: 300px;
    top: -20%;
    right: -10%;
    background: rgba(43, 123, 230, 0.20);
}
.cta-section .glow-orb:nth-child(2) {
    width: 200px;
    height: 200px;
    bottom: -10%;
    left: -5%;
    background: rgba(91, 154, 255, 0.15);
}
.cta-section .container {
    position: relative;
    z-index: 2;
}
.cta-section h2 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2.4rem, 4.5vw, 3.6rem);
    font-weight: 800;
    margin-bottom: 18px;
}
.cta-section h2 span {
    background: linear-gradient(135deg, #8bb8ff, #c0d8f5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.cta-section p {
    font-size: 1.15rem;
    max-width: 560px;
    margin: 0 auto 36px;
    opacity: 0.85;
    line-height: 1.7;
}
.cta-section .btn-group {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}
.cta-section .btn-white {
    background: #fff;
    color: var(--blue-deep);
    box-shadow: 0 8px 28px -6px rgba(0, 0, 0, 0.25);
}
.cta-section .btn-white:hover {
    background: var(--blue-lighter);
    color: #fff;
    box-shadow: 0 16px 48px -8px rgba(43, 123, 230, 0.40);
}
.cta-section .btn-outline-white {
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, 0.30);
    box-shadow: none;
}
.cta-section .btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: #fff;
    color: #fff;
    transform: translateY(-3px);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .sidebar {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    .article-content .featured-image {
        height: 280px;
    }
    .article-nav {
        grid-template-columns: 1fr;
    }
    .article-nav .nav-item.next {
        text-align: left;
    }
}

@media (max-width: 768px) {
    .article-content .featured-image {
        height: 200px;
    }
    .sidebar {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .article-content .content-body {
        font-size: 1rem;
    }
    .article-content .content-body h2 {
        font-size: 1.4rem;
    }
    .article-share {
        flex-wrap: wrap;
        justify-content: center;
    }
    .article-nav .nav-item {
        padding: 16px 18px;
    }
}

@media (max-width: 480px) {
    .article-content .featured-image {
        height: 160px;
    }
    .sidebar-related .rel-item .rel-thumb {
        width: 56px;
        height: 48px;
    }
}