/* 推荐页面专属样式 */

/* 页面头部 */
.page-header {
    padding: 8rem 2rem 3rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.page-header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 900;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fff 0%, #a5b4fc 50%, #c4b5fd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

/* 搜索和筛选 */
.filter-section {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem 2rem;
}

.search-box {
    position: relative;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.search-box input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s;
}

.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.search-box input::placeholder {
    color: var(--text-secondary);
}

.search-box i {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.category-filters {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.6rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--text-primary);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-color: transparent;
}

/* 推荐卡片网格 */
.recommendations-section {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.recommendations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.recommend-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.75rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: block;
}

.recommend-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transition: transform 0.3s;
}

.recommend-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: rgba(102, 126, 234, 0.3);
}

.recommend-card:hover::before {
    transform: scaleX(1);
}

.card-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.card-icon {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.card-icon.blue { background: rgba(102, 126, 234, 0.2); color: #667eea; }
.card-icon.purple { background: rgba(118, 75, 162, 0.2); color: #764ba2; }
.card-icon.pink { background: rgba(240, 147, 251, 0.2); color: #f093fb; }
.card-icon.red { background: rgba(245, 87, 108, 0.2); color: #f5576c; }
.card-icon.green { background: rgba(76, 175, 80, 0.2); color: #4CAF50; }
.card-icon.orange { background: rgba(255, 152, 0, 0.2); color: #FF9800; }
.card-icon.cyan { background: rgba(0, 188, 212, 0.2); color: #00BCD4; }
.card-icon.yellow { background: rgba(255, 235, 59, 0.2); color: #FFEB3B; }

.card-title-area {
    flex: 1;
}

.card-title-area h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.card-category {
    font-size: 0.8rem;
    color: var(--primary);
    font-weight: 500;
}

.card-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.card-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.card-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 500;
}

.card-arrow {
    transition: transform 0.3s;
}

.recommend-card:hover .card-arrow {
    transform: translateX(5px);
}

.featured-badge {
    padding: 0.25rem 0.75rem;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border-radius: 20px;
    font-size: 0.75rem;
    color: white;
    font-weight: 500;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* 加载状态 */
.loading {
    text-align: center;
    padding: 4rem 2rem;
}

.loading i {
    font-size: 2rem;
    color: var(--primary);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 响应式 */
@media (max-width: 768px) {
    .recommendations-grid {
        grid-template-columns: 1fr;
    }

    .category-filters {
        gap: 0.5rem;
    }

    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}