:root {
    --primary: #0a192f;
    --secondary: #172a45;
    --accent: #64ffda;
    --text: #ccd6f6;
    --text-secondary: #8892b0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--primary);
    color: var(--text);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航样式 */
header {
    background-color: var(--secondary);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--accent);
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 1.5rem;
}

nav a {
    transition: color 0.3s;
}

nav a:hover {
    color: var(--accent);
}

/* 页脚样式 */
footer {
    text-align: center;
    padding: 2rem;
    background-color: var(--secondary);
    margin-top: 2rem;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--accent);
    color: var(--primary);
    border-radius: 4px;
    transition: all 0.3s;
}

.btn:hover {
    background-color: transparent;
    color: var(--accent);
    outline: 1px solid var(--accent);
}

/* 主页英雄区域 */
.hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

/* 项目网格 */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background-color: var(--secondary);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s;
}

.project-card:hover {
    transform: translateY(-5px);
}

.project-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.project-card-content {
    padding: 1rem;
}

/* 项目详情页样式 */
.project-detail {
    margin: 2rem auto;
    max-width: 800px;
}

.project-detail img {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    margin-bottom: 1rem;
}

/* 关于页样式 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    margin: 2rem auto;
    max-width: 1000px;
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
    }
}