.ns-preview {
    position: absolute;
    z-index: 99999;
    max-width: 340px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px) scale(0.98);
    transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1), transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.2s;
    pointer-events: none;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.ns-preview.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}
.ns-preview.is-above {
    transform: translateY(-8px) scale(0.98);
}
.ns-preview.is-above.is-visible {
    transform: translateY(0) scale(1);
}
.ns-preview-inner {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    box-shadow: 0 20px 50px rgba(0,0,0,.12), 0 8px 20px rgba(0,0,0,.08);
    overflow: hidden;
}
.ns-preview-arrow {
    position: absolute;
    left: 24px;
    width: 12px;
    height: 12px;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    transform: rotate(45deg);
    z-index: -1;
}
.ns-preview:not(.is-above) .ns-preview-arrow {
    top: -7px;
    border-right: none;
    border-bottom: none;
}
.ns-preview.is-above .ns-preview-arrow {
    bottom: -7px;
    border-left: none;
    border-top: none;
}
.ns-preview .ns-image {
    width: 100%;
    height: 160px;
    object-fit: cover;
    display: block;
    background: #f1f5f9;
}
.ns-preview .ns-content {
    padding: 16px;
}
.ns-preview .ns-title {
    display: block;
    margin: 0 0 8px;
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.4;
    color: #0f172a;
}
.ns-preview .ns-excerpt {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.6;
    color: #64748b;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
@media (prefers-color-scheme: dark) {
    .ns-preview-inner {
        background: #1e293b;
        border-color: #334155;
    }
    .ns-preview-arrow {
        background: #1e293b;
        border-color: #334155;
    }
    .ns-preview .ns-title {
        color: #f1f5f9;
    }
    .ns-preview .ns-excerpt {
        color: #94a3b8;
    }
    .ns-preview .ns-image {
        background: #334155;
    }
}