.content-toc-layout {
    display: grid;
    width: min(calc(100vw - 2rem), 1640px);
    margin-left: calc(50% - min(calc(50vw - 1rem), 820px));
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
    gap: 1.25rem;
    align-items: start;
}

.content-toc-main {
    min-width: 0;
}

.content-toc-print {
    display: none;
}

.content-toc-panel {
    position: sticky;
    top: 92px;
    max-height: calc(100vh - 112px);
    overflow: hidden;
    border: 1px solid rgba(167, 139, 250, 0.22);
    border-radius: 8px;
    background:
        linear-gradient(180deg, rgba(124, 58, 237, 0.12), rgba(6, 182, 212, 0.05)),
        rgba(26, 26, 46, 0.97);
    color: var(--text-color);
    box-shadow: 0 14px 34px rgba(0, 0, 0, 0.22);
}

.content-toc-panel[data-toc-ready="false"],
.content-toc-layout:not(.has-toc) .content-toc-panel {
    display: none;
}

.content-toc-layout:not(.has-toc) {
    display: block;
}

.content-toc-layout.toc-collapsed {
    grid-template-columns: auto minmax(0, 1fr);
}

.content-toc-layout.toc-collapsed .content-toc-body {
    display: none;
}

.content-toc-layout.toc-collapsed .content-toc-panel {
    width: 48px;
}

.content-toc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.content-toc-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0;
    color: #f8fafc;
}

.content-toc-title i {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 7px;
    background: rgba(124, 58, 237, 0.24);
    color: #c4b5fd;
}

.content-toc-title span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.content-toc-toggle,
.content-toc-group-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 30px;
    height: 30px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    color: #e5e7eb;
}

.content-toc-toggle:hover,
.content-toc-group-toggle:hover {
    background: rgba(124, 58, 237, 0.28);
    color: #fff;
}

.content-toc-layout.toc-collapsed .content-toc-title span,
.content-toc-layout.toc-collapsed .content-toc-title i {
    display: none;
}

.content-toc-layout.toc-collapsed .content-toc-header {
    justify-content: center;
    padding: 0.55rem 0.45rem;
}

.content-toc-body {
    max-height: calc(100vh - 172px);
    overflow-y: auto;
    padding: 0.55rem;
}

.content-toc-list {
    display: flex;
    flex-direction: column;
    gap: 0.12rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.content-toc-children {
    position: relative;
    margin-left: 14px;
    padding-left: 12px;
}

.content-toc-children::before {
    content: "";
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 0;
    width: 1px;
    background: rgba(167, 139, 250, 0.22);
}

.content-toc-row {
    display: grid;
    grid-template-columns: 26px minmax(0, 1fr);
    gap: 0.3rem;
    align-items: start;
    min-width: 0;
}

.content-toc-group-toggle,
.content-toc-group-spacer {
    width: 24px;
    height: 28px;
    margin-top: 1px;
}

.content-toc-group-toggle {
    border: 0;
    background: transparent;
    color: #a78bfa;
}

.content-toc-group-toggle i {
    transition: transform 0.18s ease;
}

.toc-group-collapsed > .content-toc-row .content-toc-group-toggle i {
    transform: rotate(-90deg);
}

.content-toc-link {
    display: block;
    min-width: 0;
    padding: 0.42rem 0.55rem;
    border-radius: 6px;
    color: #cbd5e1;
    font-size: 0.9rem;
    line-height: 1.35;
    text-decoration: none;
    overflow-wrap: anywhere;
}

.content-toc-level-1 {
    font-weight: 700;
    color: #f8fafc;
}

.content-toc-level-2 {
    font-size: 0.88rem;
}

.content-toc-level-3,
.content-toc-level-4 {
    font-size: 0.84rem;
    color: #aeb8c8;
}

.content-toc-link:hover,
.content-toc-link.active {
    background: rgba(124, 58, 237, 0.25);
    color: #fff;
}

.content-toc-link.active {
    box-shadow: inset 3px 0 0 #a78bfa;
}

[data-toc-content] h1,
[data-toc-content] h2,
[data-toc-content] h3,
[data-toc-content] h4 {
    scroll-margin-top: 96px;
}

[data-theme="light"] .content-toc-panel {
    border-color: #e2e8f0;
    background:
        linear-gradient(180deg, rgba(124, 58, 237, 0.07), rgba(6, 182, 212, 0.03)),
        #ffffff;
    color: #1e293b;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

[data-theme="light"] .content-toc-header {
    border-bottom-color: #e2e8f0;
}

[data-theme="light"] .content-toc-title,
[data-theme="light"] .content-toc-toggle {
    color: #1e293b;
}

[data-theme="light"] .content-toc-title i {
    background: #ede9fe;
    color: #7c3aed;
}

[data-theme="light"] .content-toc-toggle {
    background: #f8fafc;
    border-color: #e2e8f0;
}

[data-theme="light"] .content-toc-toggle:hover,
[data-theme="light"] .content-toc-group-toggle:hover {
    background: #f1f5f9;
    color: #7c3aed;
}

[data-theme="light"] .content-toc-children::before {
    background: #ddd6fe;
}

[data-theme="light"] .content-toc-group-toggle {
    color: #7c3aed;
}

[data-theme="light"] .content-toc-link {
    color: #475569;
}

[data-theme="light"] .content-toc-level-1 {
    color: #1e293b;
}

[data-theme="light"] .content-toc-level-3,
[data-theme="light"] .content-toc-level-4 {
    color: #64748b;
}

[data-theme="light"] .content-toc-link:hover,
[data-theme="light"] .content-toc-link.active {
    background: #f1f5f9;
    color: #7c3aed;
}

[data-theme="light"] .content-toc-link.active {
    box-shadow: inset 3px 0 0 #7c3aed;
}

@media (max-width: 991.98px) {
    .content-toc-layout,
    .content-toc-layout.toc-collapsed {
        display: block;
        width: 100%;
        margin-left: 0;
    }

    .content-toc-panel {
        position: static;
        max-height: none;
        margin-bottom: 1rem;
    }

    .content-toc-layout.toc-collapsed .content-toc-panel {
        width: auto;
    }

    .content-toc-layout.toc-collapsed .content-toc-title span,
    .content-toc-layout.toc-collapsed .content-toc-title i {
        display: inline-flex;
    }

    .content-toc-layout.toc-collapsed .content-toc-header {
        justify-content: space-between;
        padding: 0.75rem;
    }

    .content-toc-body {
        max-height: 45vh;
    }
}

@media print {
    .content-toc-layout,
    .content-toc-layout.toc-collapsed {
        display: block;
        width: auto;
        margin-left: 0;
    }

    .content-toc-panel {
        display: none !important;
    }

    .content-toc-print {
        display: block;
        margin: 0 0 1.5rem;
        padding: 0 0 1rem;
        border-bottom: 1px solid #999;
        break-after: avoid;
    }

    .content-toc-print h2 {
        margin: 0 0 0.75rem;
        color: #000 !important;
        font-size: 18pt;
    }

    .content-toc-print-list {
        margin: 0;
        padding-left: 1.25rem;
        color: #000;
    }

    .content-toc-print-list ol {
        margin: 0.25rem 0 0.35rem;
        padding-left: 1.1rem;
    }

    .content-toc-print-list li {
        margin: 0.18rem 0;
        break-inside: avoid;
    }

    .content-toc-print-list a {
        color: #000 !important;
        text-decoration: none;
    }
}