:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-text: #f5f5f5;
    --bg-color: rgba(255, 255, 255, 0.9);
    --card-bg: rgba(255, 255, 255, 0.85);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* 背景画布样式 */
#backgroundCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* 鼠标特效容器 */
#mouseEffectsContainer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 100;
}

/* 鼠标移动轨迹点 */
.trail-point {
    position: absolute;
    border-radius: 50%;
    background-color: rgba(52, 152, 219, 0.6);
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 100;
}

/* 点击特效元素 */
.click-effect {
    position: absolute;
    border-radius: 50%;
    background-color: rgba(231, 76, 60, 0.7);
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 101;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 10;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

.profile {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    display: inline-block;
}

.profile-pic img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--primary-color);
    margin-bottom: 1rem;
    transition: var(--transition);
}

.profile-pic img:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(52, 152, 219, 0.5);
}

h1 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-color);
    background-color: var(--card-bg);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    background-color: var(--primary-color);
    color: var(--light-text);
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(52, 152, 219, 0.3);
}

main {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.content-page {
    display: none;
    animation: fadeIn 0.5s ease;
}

.content-page.active {
    display: block;
}

h2 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

footer {
    text-align: center;
    padding: 1rem;
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.social-links a {
    color: var(--text-color);
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px) scale(1.1);
}

/* 项目卡片样式 */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.project-card {
    background-color: rgba(255, 255, 255, 0.7);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.project-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.project-link:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-link {
        width: 80%;
        justify-content: center;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}