/* ===========================================
   文章页专用样式 — Bento Grid Design System
   =========================================== */

/* === Article Main === */
.article-main {
    min-height: calc(100vh - var(--nav-height));
}

/* === Article Container === */
.article-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-md) var(--space-2xl);
}

/* === Article Content Wrapper (bento card) === */
.article-content-wrapper {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-bento);
    padding: 48px 64px;
}

/* === Breadcrumb === */
.article-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-tertiary);
    margin-bottom: var(--space-md);
}

.article-breadcrumb a {
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.article-breadcrumb a:hover {
    color: var(--text-primary);
}

.article-breadcrumb i {
    font-size: 9px;
    color: var(--text-tertiary);
}

/* === Article Header === */
.article-header {
    margin-bottom: var(--space-lg);
}

.article-title {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    margin-bottom: 16px;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-page);
    padding: 5px 14px;
    border-radius: var(--radius-full);
}

.meta-item i {
    font-size: 12px;
    color: var(--violet);
}

/* === Article Content === */
.article-content {
    line-height: 1.8;
}

.article-intro {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 32px;
    padding: 20px 24px;
    background: var(--violet-soft);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--violet);
}

/* === Content Sections === */
.content-section {
    margin-bottom: var(--space-lg);
}

.content-section:last-of-type {
    margin-bottom: 0;
}

.article-content h2,
.content-section h2 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 40px 0 16px;
    padding-left: 16px;
    border-left: 4px solid var(--violet);
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.article-content h2:first-child,
.content-section h2:first-child {
    margin-top: 0;
}

.article-content h3,
.content-section h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 28px 0 12px;
    letter-spacing: -0.01em;
}

.article-content p,
.content-section p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.article-content ul,
.content-section ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
    padding-left: 0;
}

.article-content li,
.content-section li {
    position: relative;
    padding-left: 24px;
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
}

.article-content li::before,
.content-section li::before {
    content: "";
    position: absolute;
    left: 8px;
    top: 11px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--violet);
}

.article-content li ul {
    margin-top: 10px;
    margin-bottom: 0;
}

.article-content li li::before {
    background: var(--ocean);
    width: 5px;
    height: 5px;
}

.article-content strong,
.content-section strong {
    font-weight: 600;
    color: var(--text-primary);
}

/* === Tables === */
.article-content table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 20px 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-color);
    font-size: 15px;
}

.article-content thead tr {
    background: var(--bg-page) !important;
}

.article-content th {
    padding: 14px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
    border-bottom: 1px solid var(--border-color);
    border-right: 1px solid var(--border-light);
}

.article-content th:last-child {
    border-right: none;
}

.article-content td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-light);
    border-right: 1px solid var(--border-light);
    color: var(--text-secondary);
}

.article-content td:last-child {
    border-right: none;
}

.article-content tr:last-child td {
    border-bottom: none;
}

.article-content tbody tr:hover {
    background: rgba(121, 80, 242, 0.02);
}

/* === Tip Box === */
.tip-box {
    background: var(--amber-soft);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    margin: 16px 0;
    border-left: 4px solid var(--amber);
}

.tip-box ul {
    margin-bottom: 0;
}

.tip-box li::before {
    background: var(--amber) !important;
}

/* === Content Body (bilingual wrapper) === */
.content-body {
    line-height: 1.8;
}

/* === Article Footer === */
.article-footer {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-light);
}

/* === Share Buttons === */
.share-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: var(--space-md);
}

.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--bg-page);
    color: var(--text-secondary);
    font-size: 15px;
    transition: all var(--transition-fast);
}

.share-btn:hover {
    background: var(--violet-soft);
    color: var(--violet);
    transform: translateY(-2px);
}

/* === Article Navigation (prev/next) === */
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: var(--space-md);
}

.article-nav .nav-item,
.article-nav .nav-btn {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px 24px;
    background: var(--bg-page);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    text-decoration: none;
    color: var(--text-primary);
    border: 1px solid transparent;
}

.article-nav .nav-item:hover,
.article-nav .nav-btn:hover {
    background: var(--bg-card);
    border-color: var(--border-color);
    box-shadow: var(--shadow-bento);
    transform: translateY(-2px);
}

.article-nav .nav-item.disabled {
    opacity: 0.4;
    pointer-events: none;
}

.nav-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
}

.nav-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}

.article-nav .nav-item.next,
.article-nav .nav-btn.nav-next {
    text-align: right;
    align-items: flex-end;
}

.article-nav .nav-btn {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: 500;
}

.article-nav .nav-btn i {
    font-size: 12px;
    color: var(--text-tertiary);
}

.nav-prev {
    grid-column: 1;
}

.nav-next {
    grid-column: 2;
    justify-self: end;
    width: 100%;
}

/* === Responsive === */
@media (max-width: 768px) {
    .article-container {
        padding: var(--space-md) var(--space-sm) var(--space-xl);
    }

    .article-content-wrapper {
        padding: 28px 20px;
        border-radius: var(--radius-md);
    }

    .article-title {
        font-size: 28px;
    }

    .article-meta {
        gap: 8px;
    }

    .meta-item {
        font-size: 12px;
        padding: 4px 10px;
    }

    .article-content h2,
    .content-section h2 {
        font-size: 20px;
        margin-top: 32px;
    }

    .article-content h3,
    .content-section h3 {
        font-size: 17px;
    }

    .article-content p,
    .content-section p,
    .article-content li,
    .content-section li {
        font-size: 15px;
    }

    .article-nav {
        grid-template-columns: 1fr;
    }

    .article-nav .nav-item.next,
    .article-nav .nav-btn.nav-next {
        text-align: left;
        align-items: flex-start;
    }

    .nav-next {
        grid-column: 1;
    }

    .article-intro {
        font-size: 15px;
        padding: 16px 18px;
    }

    .tip-box {
        padding: 16px 18px;
    }

    .share-buttons {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .article-content-wrapper {
        padding: 24px 16px;
    }

    .article-title {
        font-size: 24px;
    }

    .article-content table {
        font-size: 13px;
    }

    .article-content th,
    .article-content td {
        padding: 10px 12px;
    }
}