/* 文章网格样式 - 竖向卡片布局 */
/* PC端：4列，手机端：2列 */

.article-grid.grid-style {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* PC端：4列 */
    gap: 16px;
}

.article-grid.grid-style .article-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    color: #333;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    height: auto;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    position: relative;
}

.article-grid.grid-style .article-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    transform: translateY(-4px);
}

.article-grid.grid-style .article-thumb {
    width: 100%;
    height: 160px;
    flex-shrink: 0;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8eaed 100%);
    position: relative;
}

.article-grid.grid-style .article-thumb::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.02) 100%);
    pointer-events: none;
}

.article-grid.grid-style .article-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease-in-out;
    display: block;
    will-change: opacity, transform;
}

.article-grid.grid-style .article-thumb img.loaded {
    opacity: 1 !important;
}

/* 图片加载失败时隐藏破损图标 */
.article-grid.grid-style .article-thumb img[src=""],
.article-grid.grid-style .article-thumb img:not([src]) {
    opacity: 0;
    visibility: hidden;
}

/* 确保图片完全填充容器 */
.article-grid.grid-style .article-thumb {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8eaed 100%);
    display: block;
}

.article-grid.grid-style .article-card:hover .article-thumb img {
    transform: scale(1.08);
}

.article-grid.grid-style .article-info {
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    min-height: 110px;
}

.article-grid.grid-style .article-title {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.5;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    color: #333;
    margin: 0;
    min-height: 42px;
}

.article-grid.grid-style .article-desc {
    font-size: 12px;
    color: #999;
    line-height: 1.6;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    margin: 0;
    flex: 1;
}

.article-grid.grid-style .article-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    font-size: 11px;
    color: #bbb;
    margin-top: auto;
    padding-top: 8px;
    border-top: 1px solid #f5f5f5;
}

.article-grid.grid-style .article-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.article-grid.grid-style .article-meta i {
    font-size: 13px;
}

/* 手机端：2列布局 */
@media (max-width: 768px) {
    .article-grid.grid-style {
        grid-template-columns: repeat(2, 1fr); /* 手机端：2列 */
        gap: 12px;
    }

    .article-grid.grid-style .article-thumb {
        height: 120px;
    }

    .article-grid.grid-style .article-info {
        padding: 12px;
        min-height: 100px;
    }

    .article-grid.grid-style .article-title {
        font-size: 13px;
        min-height: 39px;
    }

    .article-grid.grid-style .article-desc {
        font-size: 11px;
        -webkit-line-clamp: 2;
        line-clamp: 2;
    }

    .article-grid.grid-style .article-meta {
        font-size: 10px;
    }

    .article-grid.grid-style .article-meta i {
        font-size: 12px;
    }
}

/* 平板端：3列布局 */
@media (min-width: 769px) and (max-width: 1024px) {
    .article-grid.grid-style {
        grid-template-columns: repeat(3, 1fr);
        gap: 14px;
    }

    .article-grid.grid-style .article-thumb {
        height: 140px;
    }
}

/* 大屏幕优化 */
@media (min-width: 1400px) {
    .article-grid.grid-style .article-thumb {
        height: 180px;
    }

    .article-grid.grid-style .article-info {
        padding: 16px;
    }

    .article-grid.grid-style .article-title {
        font-size: 15px;
    }

    .article-grid.grid-style .article-desc {
        font-size: 13px;
    }
}

/* 加载动画优化 */
.article-grid.grid-style .article-thumb img {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

.article-grid.grid-style .article-thumb img.loaded {
    animation: none;
    background: none;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

/* 性能优化 */
.article-grid.grid-style .article-card {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.article-grid.grid-style .article-card:hover {
    will-change: transform, box-shadow;
}

.article-grid.grid-style .article-thumb {
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
}