/* 工具页「使用技巧 / 使用方法 / 能帮你解决什么」三栏折叠（<details>），宽屏横向三列、窄屏纵向堆叠 */
.tool-guide-acc {
    --tga-c1: #0ea5e9;
    --tga-c2: #f59e0b;
    --tga-c3: #10b981;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    align-items: start;
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    overflow: hidden;
}

.tool-guide-acc__section {
    min-width: 0;
    border-bottom: none;
    border-right: 1px solid var(--border-color);
}
.tool-guide-acc__section:last-child {
    border-right: none;
}

@media (max-width: 900px) {
    .tool-guide-acc {
        grid-template-columns: 1fr;
    }
    .tool-guide-acc__section {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .tool-guide-acc__section:last-child {
        border-bottom: none;
    }
}

.tool-guide-acc__summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px 16px;
    cursor: pointer;
    list-style: none;
    user-select: none;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-secondary);
    transition: background 0.15s ease;
}
.tool-guide-acc__summary:hover {
    background: var(--bg-secondary, rgba(0, 0, 0, 0.03));
}
.tool-guide-acc__summary::-webkit-details-marker {
    display: none;
}
.tool-guide-acc__summary:focus {
    outline: none;
}
.tool-guide-acc__summary:focus-visible {
    outline: 2px solid var(--primary-color, #6366f1);
    outline-offset: -2px;
}

.tool-guide-acc__title {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
    flex: 1;
}
.tool-guide-acc__title i {
    font-size: 1rem;
}
.tool-guide-acc__summary--tip .tool-guide-acc__title i {
    color: var(--tga-c1);
}
.tool-guide-acc__summary--steps .tool-guide-acc__title i {
    color: var(--tga-c2);
}
.tool-guide-acc__summary--value .tool-guide-acc__title i {
    color: var(--tga-c3);
}

.tool-guide-acc__chev {
    flex-shrink: 0;
    font-size: 1.1rem;
    color: var(--text-muted);
    transition: transform 0.2s ease;
}
.tool-guide-acc__section[open] .tool-guide-acc__chev {
    transform: rotate(180deg);
}

.tool-guide-acc__body {
    padding: 0 16px 14px 16px;
}

.tool-guide-acc__item {
    display: flex;
    align-items: flex-start;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 4px;
}
.tool-guide-acc__item:last-child {
    margin-bottom: 0;
}
.tool-guide-acc__item::before {
    content: '\00b7';
    font-size: 1rem;
    line-height: 1.4;
    color: var(--text-muted);
    flex-shrink: 0;
}