/**
 * 技术详情二级菜单样式
 * 设计理念：与主卡片风格一致，深色主题，微妙动画
 */

/* 二级菜单容器 */
.tech-detail-menu {
    position: relative;
    background: var(--bg-card);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    padding: 0;
    margin-top: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.2s ease, padding 0.3s ease, margin 0.3s ease;
    opacity: 0;
    visibility: hidden;
}

.tech-detail-menu.active {
    max-height: min(70vh, 720px);
    opacity: 1;
    padding: 16px 0;
    margin-top: 16px;
    border-color: rgba(255, 255, 255, 0.1);
    overflow-y: auto;
    visibility: visible;
    scrollbar-gutter: stable;
}

/* 技术详情项 */
.tech-detail-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    transition: background 0.2s ease;
}

.tech-detail-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.tech-detail-item:first-child {
    padding-top: 8px;
}

.tech-detail-item:last-child {
    padding-bottom: 8px;
}

/* 技术信息区域 */
.tech-info {
    flex: 1;
    min-width: 0;
}

.tech-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tech-name .hot-badge {
    font-size: 0.65rem;
    padding: 2px 6px;
    background: linear-gradient(135deg, #c2410c, #b91c1c);
    color: white;
    border-radius: 4px;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.tech-description {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 技术链接区域 */
.tech-links {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 16px;
    flex-shrink: 0;
}

.tech-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--card-color, var(--color-basic));
    text-decoration: none;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    background: rgba(255, 255, 255, 0.05);
}

.tech-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.tech-link svg {
    width: 12px;
    height: 12px;
}

.tech-link.detail-link {
    background: rgba(255, 255, 255, 0.08);
}

.tech-link.detail-link:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* 无链接状态 */
.tech-link.disabled {
    color: var(--text-muted);
    cursor: default;
    background: transparent;
}

.tech-link.disabled:hover {
    background: transparent;
    color: var(--text-muted);
}

/* 分隔线 */
.tech-detail-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.05);
    margin: 8px 24px;
}

/* 展开按钮样式 */
.expand-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    padding: 8px;
    margin-top: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.expand-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.15);
}

.expand-btn svg {
    width: 14px;
    height: 14px;
    transition: transform 0.2s ease;
}

.expand-btn.expanded svg {
    transform: rotate(180deg);
}

/* 技术标签可点击状态 */
.tech-tag.clickable {
    cursor: pointer;
    transition: all 0.2s ease;
}

.tech-tag.clickable:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.tech-tag.clickable.has-detail {
    position: relative;
}

.tech-tag.clickable.has-detail::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--card-color, var(--color-basic));
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.tech-tag.clickable.has-detail:hover::after {
    opacity: 1;
}

/* 卡片容器需要相对定位 */
.tech-card {
    position: relative;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .tech-detail-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 12px 16px;
    }
    
    .tech-links {
        margin-left: 0;
        width: 100%;
        justify-content: flex-start;
    }
    
    .tech-link {
        flex: 1;
        justify-content: center;
    }
    
    .tech-detail-menu.active {
        max-height: min(65vh, 600px);
    }
}

@media (max-width: 480px) {
    .tech-name {
        font-size: 0.85rem;
    }
    
    .tech-description {
        font-size: 0.75rem;
    }
    
    .tech-link {
        font-size: 0.7rem;
        padding: 3px 6px;
    }
}

/* 动画增强 */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tech-detail-menu.active {
    animation: slideDown 0.3s ease forwards;
}

/* 滚动条样式 */
.tech-detail-menu::-webkit-scrollbar {
    width: 6px;
}

.tech-detail-menu::-webkit-scrollbar-track {
    background: transparent;
}

.tech-detail-menu::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.tech-detail-menu::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

.tech-link:focus-visible {
    outline: 2px solid var(--color-basic);
    outline-offset: 2px;
}