*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #667eea;--secondary-color: #764ba2;--text-color: #2c3e50;--text-light: #606266;--text-lighter: #909399;--border-color: #dcdfe6;--bg-color: #f5f7fa;--success-color: #67c23a;--warning-color: #e6a23c;--danger-color: #f56c6c;--info-color: #909399}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol,"Noto Color Emoji";-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:var(--text-color);line-height:1.6}#app{min-height:100vh}a{color:var(--primary-color);text-decoration:none;transition:color .3s}a:hover{color:var(--secondary-color)}img{max-width:100%;height:auto;display:block}button{cursor:pointer;border:none;outline:none;transition:all .3s}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3}h1{font-size:48px}h2{font-size:36px}h3{font-size:24px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 32px;font-size:16px;border-radius:8px;font-weight:500;transition:all .3s}.btn-primary{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 16px #667eea4d}.btn-outline{background:transparent;border:2px solid var(--primary-color);color:var(--primary-color)}.btn-outline:hover{background:var(--primary-color);color:#fff}.card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 12px #00000014;transition:all .3s}.card:hover{transform:translateY(-4px);box-shadow:0 8px 24px #0000001f}@media (max-width: 768px){h1{font-size:32px}h2{font-size:28px}h3{font-size:20px}.btn{padding:10px 24px;font-size:14px}}