/* 项目页面特定样式 */
.projects-content {
    animation: fadeIn 0.6s ease;
}

/* 返回按钮 */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--btn-bg);
    border: 2px solid var(--btn-border);
    border-radius: 12px;
    color: var(--text-primary);
    text-decoration: none;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    margin-bottom: 30px;
    font-size: 15px;
    position: relative;
    overflow: hidden;
}

.back-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--accent-glow);
    transform: translate(-50%, -50%);
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1), height 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.back-btn:hover::before {
    width: 300px;
    height: 300px;
}

.back-btn:hover {
    background: var(--btn-bg-hover);
    transform: scale(1.08) translateY(-2px);
    box-shadow: 0 6px 25px var(--shadow-accent);
    border-color: var(--border-hover);
}

/* 页面标题 */
.page-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 40px;
    text-shadow: 0 2px 20px var(--shadow-color);
    animation: fadeInDown 0.6s ease;
}

/* 统计卡片容器 */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
    animation: fadeInUp 0.6s ease 0.2s backwards;
}

/* 统计卡片 */
.stat-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 25px;
    border-radius: 16px;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 2px solid var(--card-border);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
                box-shadow 0.35s ease, 
                border-color 0.3s ease;
    box-shadow: 0 8px 25px var(--shadow-color);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent 70%);
    opacity: 0;
    transition: opacity 0.5s ease;
}

.stat-card:hover::before {
    opacity: 1;
    animation: ripple 1.5s ease-out;
}

@keyframes ripple {
    0% {
        transform: translate(-50%, -50%) scale(0);
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
    }
}

.stat-card.total {
    background: var(--stat-total-bg);
    border-color: var(--stat-total-border);
}

.stat-card.completed {
    background: var(--stat-completed-bg);
    border-color: var(--stat-completed-border);
}

.stat-card.ongoing {
    background: var(--stat-ongoing-bg);
    border-color: var(--stat-ongoing-border);
}

.stat-card:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 18px 45px var(--shadow-color);
    z-index: 10;
}

.stat-card.total:hover {
    border-color: var(--border-hover);
    box-shadow: 0 15px 40px var(--shadow-accent);
}

.stat-card.completed:hover {
    border-color: rgba(16, 185, 129, 0.7);
    box-shadow: 0 15px 40px rgba(16, 185, 129, 0.3);
}

.stat-card.ongoing:hover {
    border-color: rgba(245, 158, 11, 0.7);
    box-shadow: 0 15px 40px rgba(245, 158, 11, 0.3);
}

.stat-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--glass-bg-medium);
    border-radius: 12px;
    color: var(--text-primary);
}

.stat-info {
    flex: 1;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 项目列表 */
.projects-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 35px;
    animation: fadeInUp 0.6s ease 0.4s backwards;
}

/* 项目卡片 */
.project-card {
    position: relative;
    background: var(--project-card-bg);
    border: 2px solid var(--card-border);
    border-radius: 20px;
    padding: 30px;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
                box-shadow 0.35s ease, 
                border-color 0.3s ease;
    box-shadow: 0 10px 30px var(--shadow-color);
    overflow: hidden;
}

.project-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
    transition: left 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover::after {
    left: 100%;
}

/* 特色项目卡片 */
.project-card.featured {
    padding: 0;
    min-height: 500px;
}

.project-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.6s ease;
    filter: brightness(0.8);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--project-overlay);
}

.project-content {
    position: relative;
    z-index: 1;
    padding: 30px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 25px 60px var(--shadow-accent), 0 0 35px var(--shadow-accent);
    border-color: var(--border-hover);
    z-index: 10;
}

.project-card.featured:hover .project-background {
    transform: scale(1.08);
    filter: brightness(0.9);
}

/* 项目头部 */
.project-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.project-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--glass-bg-medium);
    border-radius: 12px;
    color: var(--text-primary);
}

.project-title-area {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.project-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.project-status {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.completed-badge {
    background: rgba(34, 197, 94, 0.3);
    color: #4ade80;
    border: 1px solid rgba(34, 197, 94, 0.5);
}

.ongoing-badge {
    background: rgba(251, 146, 60, 0.3);
    color: #fb923c;
    border: 1px solid rgba(251, 146, 60, 0.5);
}

/* 项目描述 */
.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
    font-size: 15px;
}

/* 项目特性 */
.project-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 13px;
    padding: 8px 12px;
    background: var(--glass-bg-light);
    border-radius: 8px;
}

/* 技术标签 */
.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tech-tag {
    padding: 6px 14px;
    background: var(--glass-bg-medium);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), 
                background 0.25s ease;
}

.tech-tag:hover {
    background: var(--glass-bg-strong);
    transform: translateY(-3px) scale(1.08);
}

/* 项目链接 */
.project-links {
    display: flex;
    gap: 12px;
    margin-top: auto;
}

.project-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--glass-bg-medium);
    border: 2px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
                background 0.25s ease, 
                box-shadow 0.3s ease;
}

.project-link:hover {
    background: var(--glass-bg-strong);
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 6px 20px var(--shadow-color);
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .projects-content {
        width: 95%;
        padding: 30px 15px;
    }
    
    .stats-container {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 20px;
    }
    
    .projects-list {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .projects-content {
        width: 100%;
        padding: 25px 15px;
    }
    
    .back-btn {
        padding: 8px 15px;
        font-size: 14px;
        margin-bottom: 20px;
    }
    
    .page-title {
        font-size: 28px;
        margin-bottom: 30px;
    }
    
    .stats-container {
        grid-template-columns: 1fr;
        gap: 15px;
        margin-bottom: 35px;
    }
    
    .stat-card {
        padding: 20px;
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .projects-list {
        gap: 25px;
    }
    
    .project-card {
        padding: 20px;
    }
    
    .project-card.featured {
        min-height: 400px;
    }
    
    .project-title {
        font-size: 20px;
    }
    
    .project-description {
        font-size: 14px;
    }
    
    .project-features {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .feature-item {
        font-size: 12px;
        padding: 6px 10px;
    }
    
    .tech-tag {
        padding: 5px 12px;
        font-size: 12px;
    }
    
    .project-links {
        flex-direction: column;
        gap: 10px;
    }
    
    .project-link {
        width: 100%;
        justify-content: center;
        padding: 10px 15px;
    }
}

@media (max-width: 480px) {
    .projects-content {
        padding: 20px 10px;
    }
    
    .page-title {
        font-size: 24px;
        margin-bottom: 25px;
    }
    
    .stats-container {
        margin-bottom: 30px;
    }
    
    .stat-card {
        padding: 15px;
    }
    
    .stat-icon {
        width: 45px;
        height: 45px;
    }
    
    .stat-number {
        font-size: 24px;
    }
    
    .stat-label {
        font-size: 13px;
    }
    
    .project-card {
        padding: 15px;
        border-radius: 16px;
    }
    
    .project-card.featured {
        min-height: 350px;
    }
    
    .project-content {
        padding: 20px;
    }
    
    .project-header {
        gap: 10px;
    }
    
    .project-icon {
        width: 40px;
        height: 40px;
    }
    
    .project-title {
        font-size: 18px;
    }
    
    .project-description {
        font-size: 13px;
        margin-bottom: 15px;
    }
    
    .project-features {
        margin-bottom: 15px;
    }
    
    .tech-tag {
        padding: 4px 10px;
        font-size: 11px;
    }
    
    .project-link {
        padding: 8px 12px;
        font-size: 13px;
    }
}

@media (max-width: 360px) {
    .page-title {
        font-size: 22px;
    }
    
    .stat-number {
        font-size: 22px;
    }
    
    .project-title {
        font-size: 16px;
    }
}