/**
 * 玻璃拟态设计风格 - 统一素材卡片样式
 * 适用于：首页、素材页、下载页
 */

/* ========== 玻璃拟态卡片系统 ========== */
.materials-section {
    padding: 50px 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.section-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: #1a1a1a;
    margin: 0;
    letter-spacing: -0.5px;
}

.section-header .view-all {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    color: var(--theme-color);
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.section-header .view-all:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
    background: #e53935 !important;
}

/* 素材网格 - 响应式布局 */
.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

/* 科技渐变色卡片 - 大图预览模式 */
.material-card {
    position: relative;
    border-radius: var(--card-border-radius, 20px);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--theme-gradient-start, #667eea); background: linear-gradient(135deg, var(--theme-gradient-start, #667eea) 0%, var(--theme-gradient-end, #764ba2) 100%);
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(102, 126, 234, calc(var(--card-shadow-percent, 20) / 100));
}

.material-card:hover {
    transform: translateY(calc(-1 * var(--card-hover-lift, 10px))) scale(1.02);
    box-shadow: 0 16px 48px rgba(102, 126, 234, 0.5);
    border-color: rgba(255, 255, 255, 0.4);
}

/* 大图预览区域 */
.material-thumb {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9; max-height: 300px; /* 16:9 long rectangle, capped */
    overflow: hidden;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf4 100%);
}

.material-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.material-card:hover .material-thumb img {
    transform: scale(1.1);
}

/* 悬浮信息层 - 底部渐变遮罩 */
.material-overlay-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 60px 20px 20px;
    background: linear-gradient(to top, 
        rgba(0, 0, 0, 0.75) 0%, 
        rgba(0, 0, 0, 0.4) 40%, 
        transparent 100%);
    backdrop-filter: blur(2px);
    z-index: 2;
}

/* 标题样式 */
.material-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--card-title-color, #fff);
    margin: 0 0 10px 0;
    line-height: 1.4;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* 标签容器 - 左上角 */
.material-tags-container {
    position: absolute;
    top: 16px;
    left: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    z-index: 3;
}

.material-tag {
    padding: 6px 14px;
    background: #e53935 !important;
    border: none;
    border-radius: 20px;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
}

.material-tag:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: scale(1.08);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* 作者信息 - 右上角 */
.material-author { 
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: #e53935 !important;
    border: none;
    border-radius: 20px;
    z-index: 3;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.material-author-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    object-fit: cover;
}

.material-author-name {
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

/* 下载数和操作按钮 - 右下角 */
.material-actions {
    position: absolute;
    bottom: 16px;
    right: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 3;
}

.material-download-count {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: #e53935 !important;
    border: none;
    border-radius: 20px;
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.material-download-count i {
    color: #ffd700;
}

.material-view-btn {
    padding: 10px 20px;
    background: #fff;
    border: none;
    border-radius: 20px;
    color: #667eea;
    font-size: 13px;
    font-weight: 700;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.material-card:hover .material-view-btn {
    opacity: 1;
    transform: translateY(0);
}

.material-view-btn:hover {
    background: #f8f9ff;
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* ========== 响应式设计 ========== */
@media (max-width: 1400px) {
    .materials-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 24px;
    }
    .material-thumb {
        /*height: 320px;*/
    }
}

@media (max-width: 1200px) {
    .materials-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
        gap: 20px;
    }
    .material-thumb {
        /*height: 280px;*/
    }
    .material-title {
        font-size: 16px;
    }
}

@media (max-width: 992px) {
    .materials-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 18px;
    }
    .material-thumb {
        /*height: 260px;*/
    }
}

@media (max-width: 768px) {
    .materials-section {
        padding: 30px 0;
    }
    .container {
        padding: 0 16px;
    }
    .section-header h2 {
        font-size: 22px;
    }
    .materials-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 12px;
    }
    .material-thumb {
        /*height: 200px;*/
    }
    .material-title {
        font-size: 14px;
    }
    .material-tag,
    .material-author,
    .material-download-count {
        padding: 6px 10px;
        font-size: 11px;
    }
    .material-view-btn {
        padding: 8px 14px;
        font-size: 12px;
    }
    .material-overlay-info {
        padding: 40px 12px 12px;
    }
}

@media (max-width: 480px) {
    .materials-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .material-thumb {
        /*height: 280px;*/
    }
}