/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 与背景统一的多彩配色方案 */
    --primary-color: #2980b9;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --accent-light: #5dade2;
    --accent-dark: #2980b9;
    --success-color: #27ae60;
    --success-light: #2ecc71;
    --warning-color: #f39c12;
    --danger-color: #e91e63;
    --danger-light: #f06292;
    
    /* 文字颜色 */
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #95a5a6;
    --text-white: #ffffff;
    
    /* 背景颜色 - 调整为更有层次感 */
    --bg-primary: rgba(255, 255, 255, 0.95);
    --bg-secondary: #f8f9fa;
    --bg-light: #ecf0f1;
    --bg-card: rgba(255, 255, 255, 0.9);
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    --gradient-success: linear-gradient(135deg, var(--success-color), var(--success-light));
    --gradient-warning: linear-gradient(135deg, var(--warning-color), #f1c40f);
    --gradient-danger: linear-gradient(135deg, var(--danger-color), var(--danger-light));
    
    /* 阴影和边框 - 增加色彩 */
    --shadow-light: 0 2px 8px rgba(52, 152, 219, 0.1);
    --shadow-medium: 0 4px 16px rgba(52, 152, 219, 0.15);
    --shadow-heavy: 0 8px 32px rgba(52, 152, 219, 0.2);
    --shadow-colorful: 0 4px 20px rgba(52, 152, 219, 0.15), 0 2px 10px rgba(39, 174, 96, 0.1);
    --border-light: rgba(52, 152, 219, 0.2);
    --border-medium: rgba(52, 152, 219, 0.3);
    
    /* 间距和尺寸 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* 圆角和过渡 */
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --transition: all 0.3s ease;
    --transition-slow: all 0.4s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: -0.01em;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* 头部样式 - 增加渐变和色彩 */
header {
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(248, 249, 250, 0.9) 50%,
        rgba(236, 240, 241, 0.85) 100%);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xxl) 0;
    margin-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(52, 152, 219, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(39, 174, 96, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 90% 30%, rgba(233, 30, 99, 0.06) 0%, transparent 50%);
    z-index: 0;
}

header .container {
    position: relative;
    z-index: 1;
}

header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
    text-shadow: 0 2px 4px rgba(52, 152, 219, 0.1);
}

.tech-badge {
    font-size: 1rem;
    background: var(--gradient-primary);
    color: var(--text-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    margin-left: var(--spacing-sm);
    vertical-align: middle;
    font-weight: 600;
    box-shadow: var(--shadow-light);
    position: relative;
    overflow: hidden;
}

.tech-badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.tech-badge:hover::before {
    left: 100%;
}

header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
    font-weight: 400;
}

/* 搜索框样式 - 增加渐变边框 */
.search-box {
    position: relative;
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.search-box::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-lg);
    z-index: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.search-box:focus-within::before {
    opacity: 1;
}

.search-box input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    font-size: 1rem;
    background-color: var(--bg-card);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    transition: var(--transition);
    font-weight: 400;
    position: relative;
    z-index: 1;
    box-shadow: var(--shadow-light);
}

.search-box input:focus {
    outline: none;
    border-color: transparent;
    box-shadow: var(--shadow-colorful);
}

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

.search-box i {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-color);
    font-size: 1.1rem;
    z-index: 2;
}

/* 分类按钮样式 - 多彩渐变设计 */
.categories {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    justify-content: center;
}

.category {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    background-color: var(--bg-card);
    backdrop-filter: blur(8px);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-light);
}

.category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.category span {
    position: relative;
    z-index: 1;
}

.category:hover {
    border-color: var(--accent-color);
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-colorful);
}

.category:hover::before {
    opacity: 1;
}

.category.active {
    background: var(--gradient-primary);
    border-color: var(--accent-color);
    color: var(--text-white);
    box-shadow: var(--shadow-colorful);
}

.category.active::before {
    opacity: 0;
}

/* 为不同分类添加不同的渐变色 */
.category[data-category="web"]:hover::before,
.category[data-category="web"].active {
    background: var(--gradient-primary);
}

.category[data-category="mobile"]:hover::before,
.category[data-category="mobile"].active {
    background: var(--gradient-success);
}

.category[data-category="tool"]:hover::before,
.category[data-category="tool"].active {
    background: var(--gradient-warning);
}

.category[data-category="other"]:hover::before,
.category[data-category="other"].active {
    background: var(--gradient-danger);
}

/* 项目网格样式 - 紧凑布局 */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* 项目卡片样式 - 增强视觉效果 */
.project-card {
    background-color: var(--bg-card);
    backdrop-filter: blur(12px);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition-slow);
    border: 2px solid var(--border-light);
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
    z-index: 1;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-colorful);
    border-color: var(--accent-light);
}

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

/* 为不同类别的卡片添加不同的顶部条纹 */
.project-card[data-category="web"]::before {
    background: var(--gradient-primary);
}

.project-card[data-category="mobile"]::before {
    background: var(--gradient-success);
}

.project-card[data-category="tool"]::before {
    background: var(--gradient-warning);
}

.project-card[data-category="other"]::before {
    background: var(--gradient-danger);
}

.project-image {
    height: 180px;
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-secondary) 100%);
}

.project-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(52, 152, 219, 0.1) 0%, 
        rgba(39, 174, 96, 0.05) 50%,
        rgba(233, 30, 99, 0.08) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

.project-card:hover .project-image::after {
    opacity: 1;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
    filter: saturate(0.9);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
    filter: saturate(1.1);
}

.project-info {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(248, 249, 250, 0.9) 100%);
}

.project-info h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.3;
}

.project-info p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
    line-height: 1.6;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.project-tags span {
    background: linear-gradient(135deg, var(--bg-light) 0%, rgba(52, 152, 219, 0.1) 100%);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
    border: 1px solid var(--border-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.project-tags span::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.2), transparent);
    transition: left 0.5s ease;
}

.project-card:hover .project-tags span::before {
    left: 100%;
}

.project-link {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--gradient-primary);
    color: var(--text-white);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    align-self: flex-start;
    box-shadow: var(--shadow-light);
    position: relative;
    overflow: hidden;
}

.project-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.project-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-colorful);
}

.project-link:hover::before {
    left: 100%;
}

.project-link i {
    margin-left: var(--spacing-xs);
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.project-link:hover i {
    transform: translateX(3px);
}

/* 为不同类别的项目链接添加不同颜色 */
.project-card[data-category="web"] .project-link {
    background: var(--gradient-primary);
}

.project-card[data-category="mobile"] .project-link {
    background: var(--gradient-success);
}

.project-card[data-category="tool"] .project-link {
    background: var(--gradient-warning);
}

.project-card[data-category="other"] .project-link {
    background: var(--gradient-danger);
}

/* 无结果样式 */
.no-results {
    text-align: center;
    padding: var(--spacing-xxl);
    width: 100%;
    font-size: 1.1rem;
    color: var(--text-light);
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.no-results i {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-light);
    opacity: 0.6;
}

/* 页脚样式 - 增加渐变背景 */
footer {
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(248, 249, 250, 0.9) 50%,
        rgba(236, 240, 241, 0.85) 100%);
    backdrop-filter: blur(10px);
    color: var(--text-secondary);
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xxl);
    border-top: 2px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(52, 152, 219, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(39, 174, 96, 0.06) 0%, transparent 50%);
    z-index: 0;
}

footer .container {
    position: relative;
    z-index: 1;
}

/* 添加一些装饰性动画 */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.shimmer-effect {
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    background-size: 200% 100%;
    animation: shimmer 3s infinite;
}

/* 响应式设计 */
@media (max-width: 768px) {
    :root {
        --spacing-xxl: 32px;
        --spacing-xl: 24px;
        --spacing-lg: 20px;
    }
    
    header {
        padding: var(--spacing-xl) 0;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    header p {
        font-size: 1rem;
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: var(--spacing-md);
    }
    
    .project-info {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    header h1 {
        font-size: 1.75rem;
    }
    
    .categories {
        gap: var(--spacing-xs);
    }
    
    .category {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.85rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .project-image {
        height: 160px;
    }
    
    .project-info h3 {
        font-size: 1.1rem;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    background-color: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background-color: var(--border-medium);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--accent-light);
}