/********** Blog System Styles — Editorial Design **********/

/* Blog Hero */
.blog-hero {
    padding: 160px 0 80px;
    background: var(--surface);
}

.blog-title {
    font-family: var(--font-display);
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 20px;
}

.blog-subtitle {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 580px;
    margin-bottom: 40px;
}

.blog-stats {
    display: flex;
    gap: 48px;
}

.blog-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.blog-stat-number {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: -0.02em;
}

.blog-stat-label {
    font-family: var(--font-mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-tertiary);
}

/* Blog Filter */
.blog-filter {
    padding: 24px 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.filter-tabs {
    display: flex;
    gap: 4px;
}

.filter-tab {
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    font-family: var(--font-body);
    cursor: pointer;
    border-radius: var(--radius);
    transition: all 0.2s;
}

.filter-tab:hover {
    background: var(--surface-alt);
    color: var(--text);
}

.filter-tab.active {
    background: var(--text);
    color: var(--bg);
}

.filter-search {
    position: relative;
    width: 280px;
}

.filter-search input {
    width: 100%;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    transition: all 0.2s;
}

.filter-search input:focus {
    outline: none;
    border-color: var(--accent);
}

.filter-search input::placeholder {
    color: var(--text-tertiary);
}

/* Blog Grid */
.blog-grid-section {
    padding: 48px 0 80px;
    background: var(--bg);
    min-height: 400px;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 24px;
}

.blog-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
}

.blog-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

.blog-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.blog-card-content {
    padding: 28px;
}

.blog-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.blog-card-date {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 0.5px;
}

.blog-card-status {
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 3px 8px;
    border-radius: var(--radius);
}

.blog-card-status.published {
    background: var(--accent-surface);
    color: var(--accent);
}

.blog-card-status.draft {
    background: #FEF3C7;
    color: #92400E;
}

.blog-card-title {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 12px;
    line-height: 1.3;
    letter-spacing: -0.01em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 20px;
}

.blog-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.blog-card-tags {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-tertiary);
    letter-spacing: 0.3px;
}

.blog-card-sync {
    color: #22c55e;
    font-size: 14px;
}

/* Loading & Empty States */
.blog-loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px;
    color: var(--text-tertiary);
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.blog-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
}

.blog-empty h3 {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 400;
    color: var(--text);
    margin-bottom: 12px;
}

.blog-empty p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.btn-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid var(--accent);
    padding-bottom: 2px;
}

.btn-text {
    padding: 12px 28px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-body);
    color: var(--text);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-text:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.blog-load-more {
    text-align: center;
    margin-top: 48px;
}

/* Article Detail */
.article-header {
    padding: 140px 0 40px;
    background: var(--surface);
}

.article-breadcrumb {
    margin-bottom: 20px;
    font-size: 14px;
}

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

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

.article-breadcrumb span {
    margin: 0 8px;
    color: var(--text-tertiary);
}

.article-breadcrumb-current {
    color: var(--text-secondary);
}

.article-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 400;
    color: var(--text);
    margin-bottom: 24px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.article-author {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    color: var(--text);
    font-size: 14px;
}

.article-date {
    color: var(--text-tertiary);
    font-size: 14px;
    font-family: var(--font-mono);
}

.article-status {
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius);
    font-family: var(--font-mono);
}

.article-status.published {
    background: var(--accent-surface);
    color: var(--accent);
}

.article-status.draft {
    background: #FEF3C7;
    color: #92400E;
}

.article-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.article-tags span {
    padding: 4px 12px;
    background: var(--surface-alt);
    color: var(--text-secondary);
    font-size: 12px;
    font-family: var(--font-mono);
    border-radius: var(--radius);
}

/* Article Content */
.article-content {
    padding: 60px 0;
    background: var(--bg);
}

.article-body {
    max-width: 760px;
    margin: 0 auto;
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-secondary);
}

.article-body h1 {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 500;
    margin: 48px 0 24px;
    color: var(--text);
    letter-spacing: -0.01em;
}

.article-body h2 {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 500;
    margin: 40px 0 20px;
    color: var(--text);
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    letter-spacing: -0.01em;
}

.article-body h3 {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 500;
    margin: 32px 0 16px;
    color: var(--text);
}

.article-body p {
    margin-bottom: 20px;
}

.article-body img {
    max-width: 100%;
    border-radius: var(--radius-lg);
    margin: 24px 0;
}

.article-body code {
    background: var(--surface-alt);
    padding: 2px 6px;
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--accent);
}

.article-body pre {
    background: var(--text);
    color: var(--bg);
    padding: 24px;
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: 24px 0;
    font-size: 14px;
}

.article-body pre code {
    background: transparent;
    color: inherit;
    padding: 0;
}

.article-body blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 24px;
    margin: 24px 0;
    color: var(--text-tertiary);
    font-style: italic;
    font-family: var(--font-display);
    font-size: 18px;
}

.article-body ul, .article-body ol {
    margin: 20px 0;
    padding-left: 24px;
}

.article-body li {
    margin: 8px 0;
}

.article-body a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* Article Footer */
.article-footer {
    padding: 40px 0 80px;
    background: var(--surface);
}

.article-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 48px;
}

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

.article-share span {
    color: var(--text-tertiary);
    font-size: 14px;
}

.share-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: all 0.2s;
}

.share-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.share-btn[data-platform="wechat"] { color: #22c55e; }
.share-btn[data-platform="twitter"] { color: #1da1f2; }
.share-btn[data-platform="copy"] { color: var(--text-tertiary); }

.related-articles h3 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 24px;
    color: var(--text);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 32px;
    right: 32px;
    padding: 14px 24px;
    background: var(--text);
    color: var(--bg);
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s;
    z-index: 1000;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast.success { background: #166534; }
.toast.error { background: #991B1B; }

/* Responsive */
@media (max-width: 768px) {
    .blog-title {
        font-size: 36px;
    }

    .blog-stats {
        gap: 24px;
    }

    .blog-stat-number {
        font-size: 28px;
    }

    .filter-bar {
        flex-direction: column;
        gap: 16px;
    }

    .filter-search {
        width: 100%;
    }

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

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

    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .article-actions {
        flex-direction: column;
        gap: 16px;
    }
}