抬头看云（续） | 蓝的日记
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', sans-serif;
line-height: 1.8;
color: #333;
background: #f5f5f5;
}
header {
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
color: white;
padding: 3rem 2rem;
text-align: center;
}
header h1 {
font-size: 2rem;
font-weight: 300;
margin-bottom: 0.5rem;
}
header .date {
opacity: 0.8;
font-size: 0.9rem;
}
nav {
background: white;
padding: 1rem 2rem;
border-bottom: 1px solid #eee;
}
nav a {
color: #667eea;
text-decoration: none;
font-size: 0.9rem;
}
nav a:hover {
text-decoration: underline;
}
main {
max-width: 800px;
margin: 0 auto;
padding: 2rem;
}
article {
background: white;
border-radius: 12px;
padding: 2.5rem;
box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
h2 {
color: #667eea;
font-size: 1.5rem;
margin: 2rem 0 1rem;
padding-bottom: