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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

/* 导航栏 */
.navbar {
    background: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.navbar-logo {
    font-size: 18px;
    font-weight: 600;
    color: #2c3e50;
    text-decoration: none;
}

.navbar-links {
    display: flex;
    gap: 30px;
}

.navbar-links a {
    color: #555;
    text-decoration: none;
    font-size: 15px;
    transition: color 0.3s;
}

.navbar-links a:hover {
    color: #3498db;
}

.navbar-links a.active {
    color: #3498db;
    font-weight: 500;
}

/* 容器 */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
    background: white;
    min-height: calc(100vh - 60px);
}

/* 头部 */
.header {
    text-align: center;
    padding-bottom: 30px;
    border-bottom: 2px solid #eee;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 32px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.header p {
    color: #666;
    font-size: 16px;
}

/* 按钮 */
.download-btn {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 30px;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s;
}

.download-btn:hover {
    background: #2980b9;
}

/* 区块 */
.section {
    margin-bottom: 30px;
}

.section h2 {
    font-size: 22px;
    color: #2c3e50;
    margin-bottom: 15px;
    padding-left: 10px;
    border-left: 4px solid #3498db;
}

.section-content {
    padding-left: 15px;
}

.section-content p, .section-content li {
    margin-bottom: 10px;
    color: #555;
}

.section-content ul {
    padding-left: 20px;
}

/* 工作经历 */
.work-item {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.work-item:last-child {
    border-bottom: none;
}

.work-title {
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 5px;
}

.work-meta {
    color: #666;
    font-size: 14px;
    margin-bottom: 8px;
}

.work-desc {
    color: #555;
    font-size: 14px;
}

.work-desc li {
    margin-bottom: 5px;
}

.work-item h3 {
    font-size: 16px;
    color: #34495e;
    margin: 10px 0 8px 0;
}

/* 占位页面 */
.placeholder {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

.placeholder h2 {
    font-size: 24px;
    color: #ccc;
    margin-bottom: 20px;
}

.placeholder p {
    font-size: 16px;
}

/* 响应式 */
@media (max-width: 768px) {
    .navbar-content {
        padding: 0 15px;
        height: 50px;
    }

    .navbar-links {
        gap: 20px;
    }

    .navbar-links a {
        font-size: 14px;
    }

    .container {
        padding: 20px 15px;
    }

    .header h1 {
        font-size: 26px;
    }
}