body, html { margin: 0; padding: 0; font-family: '思源黑体', sans-serif; overflow-x: hidden; background: linear-gradient(135deg, #e6f7ff, #f0f8ff); color: #333; line-height: 1.8; }
.container { max-width: 1200px; margin: auto; padding: 20px; box-sizing: border-box; display: flex; flex-direction: column; align-items: center; }
.header { text-align: center; padding: 40px 20px; background: linear-gradient(to bottom, #cce7ff, #ffffff); border-radius: 15px; margin-bottom: 30px; width: 90%; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
.header h1 { font-size: 2.5em; color: #003366; margin-bottom: 15px; }
.header p { font-size: 1.2em; color: #555; }
.buy-btn { display: inline-block; padding: 15px 30px; background: #ff6f61; color: white; text-decoration: none; border-radius: 5px; transition: all 0.3s ease; font-size: 1.2em; margin-top: 20px; }
.buy-btn:hover { background: #ff4d4d; transform: scale(1.05); }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; width: 90%; margin-bottom: 40px; }
.feature-card { background: rgba(255,255,255,0.8); padding: 20px; border-radius: 10px; box-shadow: 0 3px 5px rgba(0,0,0,0.05); backdrop-filter: blur(10px); transition: all 0.3s ease; }
.feature-card:hover { transform: translateY(-5px); box-shadow: 0 6px 10px rgba(0,0,0,0.1); }
.feature-card h3 { font-size: 1.5em; color: #003366; margin-bottom: 10px; }
.feature-card p { font-size: 1em; color: #666; }
.article-section { background: rgba(255,255,255,0.9); padding: 30px; border-radius: 10px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); width: 90%; margin-bottom: 40px; }
.article-section h2, .article-section h3 { color: #003366; }
.article-section p { font-size: 1em; color: #555; }
.article-section span { font-weight: bold; }
@media (max-width: 768px) { 
    .header h1 { font-size: 2em; } 
    .buy-btn { font-size: 1em; padding: 12px 25px; }
    .features { grid-template-columns: 1fr; }
}
@media (min-width: 1200px) { 
    .container { padding: 40px; }
    .header { padding: 60px 40px; }
    .feature-card { padding: 30px; }
}