I want to make my URL as SEO Friendly URL. I tried editing .htaccess file by rewriting rule
.htaccess
RewriteRule ^swift-details/([0-9]+)/([0-9a-zA-Z_-]+)$
You dont need the second rewrite rule. Your CSS/JS paths are all 'relative' to your current location.
Your CSS exists here: /css/normalize.css
Your page is looking here: /swift-details/2/abblinbb/css/normalize.css
All you need is 'forward-slashes' before your CSS/JS paths.