*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,PingFang SC,Microsoft YaHei,sans-serif;color:#303133;background:#f5f7fa;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:#4a90d9;text-decoration:none;transition:color .2s}a:hover{color:#2a76c6}img{max-width:100%;height:auto;display:block}.container{max-width:1200px;margin:0 auto;padding:0 24px}@media (max-width: 768px){.container{padding:0 16px}}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 32px;border-radius:4px;font-size:16px;font-weight:500;cursor:pointer;transition:all .3s;border:none}.btn--primary{background:#4a90d9;color:#fff}.btn--primary:hover{background:#2a76c6;transform:translateY(-2px);box-shadow:0 4px 16px #0000001a}.btn--outline{background:transparent;border:2px solid #4A90D9;color:#4a90d9}.btn--outline:hover{background:#4a90d9;color:#fff}.section{padding:64px 0}.section--gray{background:#f5f7fa}.section__title{text-align:center;font-size:32px;font-weight:700;margin-bottom:16px;color:#303133}.section__subtitle{text-align:center;font-size:16px;color:#909399;margin-bottom:40px}