/**
 * 订阅组卡片样式
 * 包含多种卡片风格和布局选项
 */

/* ------ 共享基础卡片样式 ------ */
.group-item {
    position: relative;
    transition: all 0.3s ease;
    overflow: hidden;
}

.group-thumbnail {
    position: relative;
    overflow: hidden;
}

.group-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.group-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: #777;
}

.group-subscriber-count {
    display: flex;
    align-items: center;
    gap: 5px;
}

.group-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 10px;
}

.group-category-link {
    font-size: 0.8rem;
    padding: 3px 8px;
    border-radius: 12px;
    background: #f0f2f5;
    color: #666;
    text-decoration: none;
    transition: all 0.2s ease;
}

.group-category-link:hover {
    background: #e0e3e9;
    color: #333;
}

.group-readmore {
    display: inline-block;
    margin-top: 15px;
    padding: 8px 15px;
    background: #4a90e2;
    color: white;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: background 0.2s ease;
}

.group-readmore:hover {
    background: #3a7bc8;
}

/* ------ 网格布局 (Grid) ------ */
.subscription-groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

/* ------ 列表布局 (List) ------ */
.subscription-groups-list .group-item {
    display: flex;
    margin-bottom: 25px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.subscription-groups-list .group-thumbnail {
    flex: 0 0 200px;
}

.subscription-groups-list .group-content {
    flex: 1;
    padding: 20px;
}

/* ------ 瀑布流布局 (Masonry) ------ */
.subscription-groups-masonry {
    margin: 0 -12.5px;
}

.subscription-groups-masonry .group-item {
    width: calc(33.333% - 25px);
    margin: 0 12.5px 25px;
}

/* ------ 杂志布局 (Magazine) ------ */
.subscription-groups-magazine {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: minmax(100px, auto);
    gap: 25px;
}

.subscription-groups-magazine .group-item:first-child {
    grid-column: span 2;
    grid-row: span 2;
}

.subscription-groups-magazine .group-item:first-child .group-title {
    font-size: 1.8rem;
}

/* ------ 标准卡片样式 (Standard) ------ */
.card-style-standard .group-item {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.card-style-standard .group-thumbnail {
    border-radius: 8px 8px 0 0;
}

.card-style-standard .group-content {
    padding: 20px;
}

.card-style-standard .group-title {
    font-size: 1.2rem;
    margin: 0 0 10px 0;
}

.card-style-standard .group-title a {
    color: #333;
    text-decoration: none;
}

.card-style-standard .group-title a:hover {
    color: #4a90e2;
}

.card-style-standard .group-excerpt {
    color: #666;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.card-style-standard .group-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.card-style-standard .group-item:hover .group-thumbnail img {
    transform: scale(1.05);
}

/* ------ 现代卡片样式 (Modern) ------ */
.card-style-modern .group-item {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    border: 1px solid rgba(0,0,0,0.05);
    overflow: visible;
}

.card-style-modern .group-thumbnail {
    margin: 12px 12px 0;
    border-radius: 8px;
}

.card-style-modern .group-content {
    padding: 15px 20px 20px;
}

.card-style-modern .group-title {
    font-size: 1.3rem;
    margin: 5px 0 12px;
    font-weight: 600;
}

.card-style-modern .group-title a {
    color: #222;
    text-decoration: none;
}

.card-style-modern .group-title a:hover {
    color: #4a90e2;
}

.card-style-modern .group-excerpt {
    color: #555;
    margin-bottom: 15px;
    line-height: 1.6;
}

.card-style-modern .group-meta {
    margin-bottom: 15px;
}

.card-style-modern .group-readmore {
    margin-top: 5px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: none;
    color: #4a90e2;
    padding: 0;
    font-weight: 600;
}

.card-style-modern .group-readmore::after {
    content: '→';
    transition: transform 0.2s ease;
}

.card-style-modern .group-readmore:hover {
    background: none;
    color: #3a7bc8;
}

.card-style-modern .group-readmore:hover::after {
    transform: translateX(5px);
}

/* ------ 科技风卡片样式 (Tech) ------ */
.card-style-tech .group-item {
    background: linear-gradient(135deg, #121212, #1a1f35);
    color: #eee;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3), 0 0 0 1px rgba(255,255,255,0.1);
    border: none;
    position: relative;
    transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.card-style-tech .group-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #00f2fe, #4facfe);
    z-index: 2;
}

.card-style-tech .group-content {
    padding: 25px 20px;
    position: relative;
    background: rgba(18, 18, 24, 0.7);
    backdrop-filter: blur(5px);
}

.card-style-tech .group-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 15px 0;
    position: relative;
    padding-bottom: 12px;
}

.card-style-tech .group-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, #00f2fe, #4facfe);
}

.card-style-tech .group-title a {
    color: #fff;
    text-decoration: none;
    text-shadow: 0 0 15px rgba(0, 242, 254, 0.3);
    transition: all 0.3s ease;
}

.card-style-tech .group-title a:hover {
    color: #4facfe;
}

.card-style-tech .group-excerpt {
    color: #aaa;
    margin: 0 0 20px;
    font-size: 0.9rem;
    line-height: 1.6;
    position: relative;
}

.card-style-tech .group-meta {
    padding: 12px 0 0;
    color: #888;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
}

.card-style-tech .group-category-link {
    background: rgba(0, 242, 254, 0.1);
    color: #00f2fe;
    border: 1px solid rgba(0, 242, 254, 0.2);
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 20px;
    transition: all 0.2s ease;
}

.card-style-tech .group-category-link:hover {
    background: rgba(0, 242, 254, 0.2);
    color: #fff;
}

.card-style-tech .group-readmore {
    background: linear-gradient(45deg, #00f2fe, #4facfe);
    border: none;
    box-shadow: 0 5px 15px rgba(0, 242, 254, 0.3);
    font-weight: 500;
    letter-spacing: 0.5px;
    padding: 10px 20px;
    transition: all 0.3s ease;
    margin-top: 20px;
    border-radius: 25px;
    display: inline-flex;
    align-items: center;
}

.card-style-tech .group-readmore:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 242, 254, 0.4);
}

.card-style-tech .group-readmore::after {
    content: '→';
    margin-left: 8px;
    transition: transform 0.2s ease;
}

.card-style-tech .group-readmore:hover::after {
    transform: translateX(4px);
}

.card-style-tech .group-thumbnail {
    position: relative;
    overflow: hidden;
}

.card-style-tech .group-thumbnail::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(18, 18, 24, 0.1), rgba(18, 18, 24, 0.9));
    pointer-events: none;
}

.card-style-tech .group-thumbnail img {
    transition: transform 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
    filter: saturate(0.8) contrast(1.1);
}

.card-style-tech .group-item:hover .group-thumbnail img {
    transform: scale(1.08);
}

.card-style-tech .group-subscriber-count {
    background: rgba(0, 0, 0, 0.3);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: #00f2fe;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.card-style-tech .group-date {
    font-size: 0.8rem;
    color: #777;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* ------ 极简卡片样式 (Minimal) ------ */
.card-style-minimal .group-item {
    background: #fff;
    padding: 0;
    border: none;
    border-radius: 0;
    box-shadow: 0 0 0 1px rgba(0,0,0,0.05);
    position: relative;
    transition: all 0.3s ease;
}

.card-style-minimal .group-thumbnail {
    margin-bottom: 0;
}

.card-style-minimal .group-content {
    padding: 25px;
}

.card-style-minimal .group-title {
    font-size: 1.2rem;
    font-weight: 500;
    margin: 0 0 15px 0;
    line-height: 1.4;
    color: #111;
    position: relative;
    padding-bottom: 15px;
}

.card-style-minimal .group-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 20px;
    height: 2px;
    background: #000;
}

.card-style-minimal .group-title a {
    color: #111;
    text-decoration: none;
    transition: color 0.2s ease;
}

.card-style-minimal .group-title a:hover {
    color: #666;
}

.card-style-minimal .group-excerpt {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.card-style-minimal .group-meta {
    font-size: 0.8rem;
    color: #999;
    margin-bottom: 15px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.card-style-minimal .group-category-link {
    color: #777;
    text-decoration: none;
    font-size: 0.8rem;
    margin-right: 3px;
    position: relative;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.card-style-minimal .group-category-link::after {
    content: '•';
    margin: 0 5px;
}

.card-style-minimal .group-category-link:last-child::after {
    display: none;
}

.card-style-minimal .group-item:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}


.card-style-minimal .group-readmore::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background: #111;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-origin: right;
}

.card-style-minimal .group-readmore:hover {
    color: #000;
}

.card-style-minimal .group-readmore:hover::after {
    transform: translateX(10px);
    opacity: 0.5;
}

.card-style-minimal .group-subscriber-count {
    font-size: 0.85rem;
    color: #999;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.card-style-minimal .group-date {
    font-size: 0.85rem;
    color: #999;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* ------ 响应式设计 ------ */
@media (max-width: 992px) {
    .subscription-groups-masonry .group-item {
        width: calc(50% - 25px);
    }
    
    .subscription-groups-magazine {
        grid-template-columns: 1fr;
    }
    
    .subscription-groups-magazine .group-item:first-child {
        grid-column: 1;
        grid-row: 1;
    }
    
    .subscription-groups-list .group-item {
        flex-direction: column;
    }
    
    .subscription-groups-list .group-thumbnail {
        flex: none;
        width: 100%;
    }
}

@media (max-width: 768px) {
    .subscription-groups-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

@media (max-width: 576px) {
    .subscription-groups-masonry .group-item {
        width: calc(100% - 25px);
    }
    
    .subscription-groups-grid {
        grid-template-columns: 1fr;
    }
}