/* ========== 开发地带页面样式 ========== */

/* 项目筛选器 */
.project-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-light);
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-size: 0.9rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: var(--primary-color);
    color: white;
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.3);
}

/* 项目网格 */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 2.5rem;
    margin-top: 2rem;
}

.project-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.project-item:hover::before {
    transform: scaleX(1);
}

.project-item:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: rgba(0, 243, 255, 0.5);
    box-shadow: 0 10px 40px rgba(0, 243, 255, 0.2),
                0 0 0 1px rgba(0, 243, 255, 0.1);
}

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

.project-title {
    font-size: 1.3rem;
    color: var(--text-light);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.project-icon {
    font-size: 2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(0, 243, 255, 0.1), rgba(102, 126, 234, 0.1));
    border-radius: 12px;
    border: 1px solid rgba(0, 243, 255, 0.2);
    transition: var(--transition-smooth);
}

.project-item:hover .project-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 5px 15px rgba(0, 243, 255, 0.3);
}

.project-status {
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-status.active {
    background: linear-gradient(135deg, rgba(0, 243, 255, 0.2), rgba(102, 126, 234, 0.2));
    color: var(--primary-color);
    border: 1px solid rgba(0, 243, 255, 0.4);
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.2);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 10px rgba(0, 243, 255, 0.2);
    }
    50% {
        box-shadow: 0 0 20px rgba(0, 243, 255, 0.4);
    }
}

.project-status.completed {
    background: rgba(34, 197, 94, 0.2);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.project-status.maintenance {
    background: rgba(251, 191, 36, 0.2);
    color: #fbbf24;
    border: 1px solid rgba(251, 191, 36, 0.3);
}

.project-description {
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tech-tag {
    background: rgba(0, 243, 255, 0.08);
    border: 1px solid rgba(0, 243, 255, 0.25);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--transition-smooth);
    letter-spacing: 0.02em;
}

.tech-tag:hover {
    background: rgba(0, 243, 255, 0.15);
    border-color: rgba(0, 243, 255, 0.4);
    transform: translateY(-2px);
}

.project-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: auto;
    padding-top: 1rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition-smooth);
    backdrop-filter: blur(10px);
    flex: 1;
    justify-content: center;
    min-width: 120px;
}

.project-link:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 243, 255, 0.3);
}

.project-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.project-link.demo {
    background: linear-gradient(135deg, rgba(0, 243, 255, 0.1), rgba(102, 126, 234, 0.1));
}

.project-link.demo:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: linear-gradient(135deg, rgba(0, 243, 255, 0.15), rgba(102, 126, 234, 0.15));
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

/* 项目元信息 */
.project-meta {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
}

.project-meta small {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-gray);
    font-size: 0.75rem;
    opacity: 0.8;
}

/* 项目统计 */
.project-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 243, 255, 0.3);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-gray);
    font-size: 0.9rem;
    font-weight: 500;
}

/* 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: 768px) {
    .project-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .project-filter {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.5rem 1.2rem;
        font-size: 0.85rem;
    }
    
    .project-item {
        padding: 1.5rem;
    }
    
    .project-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .project-title {
        font-size: 1.2rem;
    }
    
    .project-icon {
        width: 42px;
        height: 42px;
        font-size: 1.8rem;
    }
    
    .project-links {
        flex-direction: row;
        width: 100%;
    }
    
    .project-link {
        justify-content: center;
        flex: 1;
        min-width: 100px;
    }
    
    .project-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .project-grid {
        gap: 1.2rem;
    }
    
    .project-title {
        font-size: 1.1rem;
        gap: 0.6rem;
    }
    
    .project-icon {
        width: 38px;
        height: 38px;
        font-size: 1.6rem;
    }
    
    .project-description {
        font-size: 0.9rem;
    }
    
    .project-links {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .project-link {
        width: 100%;
    }
    
    .project-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
}