.blog-article>.container {
    max-width: 1100px
}

.blog-layout {
    display: flex;
    gap: var(--sp-8);
    align-items: flex-start
}

.blog-layout-content {
    flex: 1;
    min-width: 0;
    max-width: 820px
}

.blog-toc {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: 90px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent
}

.blog-toc::-webkit-scrollbar {
    width: 4px
}

.blog-toc::-webkit-scrollbar-track {
    background: transparent
}

.blog-toc::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-sm)
}

.blog-toc-inner {
    padding: var(--sp-4);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md)
}

.blog-toc-title {
    font-size: var(--text-sm);
    font-weight: var(--weight-bold);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 0 0 0.75rem 0;
    padding-bottom: var(--sp-2);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: var(--sp-2)
}

.blog-toc-title i {
    font-size: var(--text-xs);
    color: var(--primary)
}

.blog-toc-list {
    list-style: none;
    margin: 0;
    padding: 0
}

.blog-toc-item {
    margin-bottom: var(--sp-1)
}

.blog-toc-item--sub {
    padding-left: 0.75rem
}

.blog-toc-link {
    display: block;
    padding: 0.3rem 0.5rem;
    font-size: var(--text-sm);
    line-height: 1.4;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: var(--radius-sm);
    border-left: 2px solid transparent;
    transition: color var(--ease-base), background var(--ease-base), border-color var(--ease-base)
}

.blog-toc-link:hover {
    color: var(--text);
    background: var(--primary-bg-subtle)
}

.blog-toc-link--active {
    color: var(--primary);
    background: var(--primary-bg-light);
    border-left-color: var(--primary);
    font-weight: var(--weight-semibold)
}

.blog-toc-item--sub .blog-toc-link {
    font-size: var(--text-xs);
    padding: 0.25rem 0.5rem
}

.blog-toc-toggle {
    display: none
}

/* Code copy button styles moved to critical.css (.code-copy-btn) */

@media (max-width:1200px) {
    .blog-toc {
        width: 190px
    }
}

@media (max-width:1024px) {
    .blog-layout {
        flex-direction: column;
        gap: 0
    }

    .blog-toc {
        width: 100%;
        position: relative;
        top: auto;
        max-height: none;
        overflow: visible;
        margin-bottom: 1.5rem
    }

    .blog-toc-inner {
        display: none
    }

    .blog-toc-toggle {
        display: flex;
        align-items: center;
        gap: var(--sp-2);
        width: 100%;
        padding: 0.75rem var(--sp-4);
        background: var(--card);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        color: var(--text-muted);
        font-size: var(--text-sm);
        font-weight: var(--weight-semibold);
        cursor: pointer;
        font-family: inherit;
        transition: color var(--ease-base), border-color var(--ease-base)
    }

    .blog-toc-toggle:hover {
        color: var(--text);
        border-color: var(--primary)
    }

    .blog-toc-toggle i:first-child {
        color: var(--primary);
        font-size: var(--text-sm)
    }

    .blog-toc-toggle-icon {
        margin-left: auto;
        font-size: var(--text-xs);
        transition: transform var(--ease-base)
    }

    .blog-toc-toggle[aria-expanded="true"] .blog-toc-toggle-icon {
        transform: rotate(180deg)
    }

    .blog-toc-nav--open {
        display: block !important
    }

    .blog-toc-nav {
        display: none;
        margin-top: var(--sp-2);
        padding: 0.75rem var(--sp-4);
        background: var(--card);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm)
    }

    .blog-toc-nav .blog-toc-list {
        max-height: 50vh;
        overflow-y: auto
    }

    #reading-progress {
        cursor: pointer;
        transition: height var(--ease-fast)
    }

    #reading-progress:hover {
        height: 6px
    }
}

@media print {

    .blog-toc {
        display: none !important
    }

    .blog-layout {
        display: block
    }
}