sudo tee /var/www/html/style.css > /dev/null <<'EOF'
body {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  color: #444;
  max-width: 720px;
  margin: 0 auto;
  padding: 20px;
  background-color: #fdfdfd;
}

header {
  text-align: center;
  padding-bottom: 15px;
  margin-bottom: 25px;
  border-bottom: 1px solid #eee;
}

header h1 {
  margin: 0;
  font-size: 1.8rem;
  color: #5a7d65;
  font-weight: 500;
}

nav a {
  margin: 0 12px;
  text-decoration: none;
  color: #6b8e74;
  font-weight: 500;
}

nav a:hover {
  color: #4a6b55;
  text-decoration: underline;
}

article {
  background: white;
  padding: 20px;
  margin-bottom: 25px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: transform 0.2s;
}

article:hover {
  transform: translateY(-2px);
}

article h2 {
  margin-top: 0;
  color: #3a5a40;
}

article a {
  color: #5a7d65;
  text-decoration: none;
}

article a:hover {
  text-decoration: underline;
}

time {
  display: block;
  color: #888;
  font-size: 0.95em;
  margin-bottom: 10px;
}

footer {
  text-align: center;
  margin-top: 30px;
  color: #999;
  font-size: 0.95em;
  padding-top: 15px;
  border-top: 1px solid #f0f0f0;
}

ul {
  padding-left: 20px;
}

ul li {
  margin-bottom: 8px;
}
EOF