nginx配置了HTTPS后,首页显示安全了,但是进入文章后显示不安全

nginx配置

server {
    listen 80;
    return 301 https://www.punklu.tech;
}
server {
         listen 443 ssl;
         server_name www.punklu.tech;
         root html;
         index index.html index.htm;
         ssl_certificate   2559746_www.punklu.tech.pem;
         ssl_certificate_key  2559746_www.punklu.tech.key;
         ssl_session_timeout 5m;
         ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
         ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
         ssl_prefer_server_ciphers on;
         location / {
             proxy_pass http://172.19.72.71:8090;
         }
}

首页是安全的,但是进入文章后,显示并非完全安全