/* ========== 知识库页面样式 ========== */

/* 搜索容器 */
.search-container {
    max-width: 700px;
    margin: 2rem auto 4rem;
    position: relative;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    padding: 0.5rem;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.3);
}

.search-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-light);
    font-size: 1rem;
    padding: 0.75rem 1rem;
    font-family: inherit;
}

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

.search-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.search-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.5);
}

.search-btn svg {
    width: 20px;
    height: 20px;
}

/* 分类容器 */
.categories-container {
    margin-top: 2rem;
}

/* 单个分类区块 */
.category-section {
    margin-bottom: 4rem;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid rgba(0, 243, 255, 0.2);
}

.category-icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 0 10px rgba(0, 243, 255, 0.3));
}

.category-title {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 网站卡片网格 */
.websites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 1.5rem;
}

/* 网站卡片样式 */
.website-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.75rem;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

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

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

.website-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 243, 255, 0.5);
    box-shadow: 0 15px 40px rgba(0, 243, 255, 0.2),
                0 0 0 1px rgba(0, 243, 255, 0.1);
}

.website-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.website-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-light);
    margin: 0;
    line-height: 1.4;
    flex: 1;
}

.website-number {
    background: rgba(0, 243, 255, 0.1);
    border: 1px solid rgba(0, 243, 255, 0.3);
    color: var(--primary-color);
    padding: 0.25rem 0.6rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    min-width: 2rem;
    text-align: center;
}

.website-description {
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 1.25rem;
    font-size: 0.95rem;
    flex: 1;
}

.website-subscription {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: rgba(0, 243, 255, 0.05);
    border-radius: 10px;
    border: 1px solid rgba(0, 243, 255, 0.1);
}

.website-subscription strong {
    color: var(--text-light);
}

.website-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.75rem 1.25rem;
    background: rgba(0, 243, 255, 0.1);
    border: 1px solid rgba(0, 243, 255, 0.3);
    border-radius: 10px;
    transition: var(--transition-smooth);
    margin-top: auto;
}

.website-link:hover {
    background: rgba(0, 243, 255, 0.2);
    border-color: var(--primary-color);
    transform: translateX(5px);
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.3);
}

.website-link svg {
    width: 18px;
    height: 18px;
}

/* 加载指示器 */
.loading-indicator {
    text-align: center;
    padding: 3rem;
    color: var(--text-gray);
}

.loading-indicator.hidden {
    display: none;
}

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

.empty-state .empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.empty-state p {
    font-size: 1rem;
    line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .websites-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }
}

@media (max-width: 768px) {
    .websites-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
    
    .search-container {
        margin: 1.5rem auto 2.5rem;
    }
    
    .website-card {
        padding: 1.5rem;
    }
    
    .category-header {
        margin-bottom: 1.5rem;
    }
    
    .category-icon {
        font-size: 2rem;
    }
    
    .category-title {
        font-size: 1.5rem;
    }
    
    .category-section {
        margin-bottom: 3rem;
    }
}

@media (max-width: 480px) {
    .website-name {
        font-size: 1.1rem;
    }
    
    .website-description {
        font-size: 0.9rem;
    }
    
    .search-input {
        font-size: 0.9rem;
        padding: 0.6rem 0.8rem;
    }
    
    .category-title {
        font-size: 1.3rem;
    }
    
    .category-icon {
        font-size: 1.75rem;
    }
}