/* 卡片库页面容器 */
.cards-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 80vh;
}

/* 页面标题 */
.page-title {
    text-align: center;
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 3rem;
    background: linear-gradient(45deg, #8a7aff, #c4b5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transform: translateZ(0);
}

/* 搜索和筛选区域 */
.search-filter-container {
    margin-bottom: 3rem;
}

/* 搜索框 */
.search-box {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.search-box input {
    flex: 1;
    padding: 0.8rem 1.5rem;
    border-radius: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    font-size: 1rem;
}

.search-box input:focus {
    outline: none;
    border-color: rgba(138, 122, 255, 0.5);
}

.search-btn {
    padding: 0.8rem 1.5rem;
    border-radius: 2rem;
    border: none;
    background: rgba(138, 122, 255, 0.8);
    color: #fff;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.search-btn:hover {
    transform: translateY(-2px);
}

/* 筛选按钮组 */
.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.filter-btn {
    padding: 0.8rem 1.5rem;
    border-radius: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    background: rgba(138, 122, 255, 0.2);
}

.filter-btn.active {
    background: rgba(138, 122, 255, 0.8);
    border-color: transparent;
}

/* 卡片网格 */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

/* 卡片项目 */
.card-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
}

@supports (backdrop-filter: blur(10px)) {
    .card-item {
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
    }
}

.card-item:hover {
    transform: translateY(-5px);
}

/* 卡片图片 */
.card-image {
    position: relative;
    padding-top: 140%; /* 调整比例为 7:10 */
    overflow: hidden;
    background: rgba(255, 255, 255, 0.05);
    min-height: 200px;
}

.card-image::before {
    content: "加载中...";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #8a7aff;
    z-index: 1;
    opacity: 1;
    transition: opacity 0.3s ease;
    background: rgba(0, 0, 0, 0.5);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
}

.card-image.loaded::before {
    opacity: 0;
    pointer-events: none;
}

.card-image.error::before {
    content: "加载失败";
    color: #ff7a7a;
    opacity: 1;
}

.card-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.3s ease;
    visibility: visible;
}

.card-image img.loaded {
    opacity: 1 !important;
}

.card-image img.error {
    opacity: 0.5 !important;
    filter: grayscale(100%);
}

/* 卡片信息 */
.card-info {
    padding: 1rem;
    text-align: center;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.card-info h3 {
    font-size: 1.1rem;
    margin: 0;
    color: #fff;
}

.card-keywords {
    color: #ccc;
    font-size: 0.85rem;
    margin: 0;
    line-height: 1.4;
}

.view-details {
    margin-top: auto;
    padding: 0.6rem 1.2rem;
    border-radius: 1.5rem;
    border: none;
    background: rgba(138, 122, 255, 0.8);
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.view-details:hover {
    transform: translateY(-2px);
    background: rgba(138, 122, 255, 0.9);
    box-shadow: 0 4px 12px rgba(138, 122, 255, 0.3);
}

/* 错误提示 */
.error-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #ff7a7a;
    background: rgba(0, 0, 0, 0.5);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    z-index: 2;
}

/* 图片加载动画 */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.card-image.loading {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.05) 25%,
        rgba(255, 255, 255, 0.1) 37%,
        rgba(255, 255, 255, 0.05) 63%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
}

.modal-content {
    background: rgba(20, 20, 40, 0.95);
    border-radius: 1rem;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.close-modal {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 1.5rem;
    color: #fff;
    cursor: pointer;
    z-index: 1;
}

.modal-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding: 2rem;
}

.card-detail-image {
    position: relative;
    padding-top: 150%;
}

.card-detail-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0.5rem;
}

.card-detail-info {
    color: #fff;
}

.card-detail-info h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(45deg, #8a7aff, #c4b5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.meaning-section {
    margin-bottom: 2rem;
}

.meaning-section h3 {
    color: #8a7aff;
    margin-bottom: 1rem;
}

.meaning-section p {
    color: #ccc;
    line-height: 1.6;
}

.keyword-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.keyword-tag {
    background: rgba(138, 122, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 1rem;
    font-size: 0.9rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .cards-container {
        padding: 1rem;
    }
    
    .search-filter-container {
        margin-bottom: 2rem;
    }
    
    .filter-buttons {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
    
    .modal-body {
        grid-template-columns: 1fr;
    }
    
    .card-detail-image {
        padding-top: 100%;
    }
}

/* 延迟加载动画 */
.lazy-load {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.lazy-load.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 性能优化 */
@media (prefers-reduced-motion: reduce) {
    .card-item,
    .card-image img,
    .search-btn,
    .filter-btn,
    .load-more-btn,
    .lazy-load {
        transition: none;
    }
}

/* 加载更多按钮 */
.load-more-btn {
    display: block;
    margin: 3rem auto;
    padding: 1rem 2.5rem;
    border-radius: 2rem;
    border: none;
    background: linear-gradient(45deg, rgba(138, 122, 255, 0.8), rgba(196, 181, 253, 0.8));
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.load-more-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: 0.5s;
}

.load-more-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(138, 122, 255, 0.4);
}

.load-more-btn:hover::before {
    left: 100%;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 1rem;
    }

    .card-image {
        min-height: 160px;
    }

    .card-info {
        padding: 0.8rem;
        gap: 0.6rem;
    }

    .card-info h3 {
        font-size: 1rem;
    }

    .card-keywords {
        font-size: 0.8rem;
    }

    .view-details {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }

    .load-more-btn {
        padding: 0.8rem 2rem;
        font-size: 0.9rem;
    }
}