Beego项目部署：Nginx反向代理及HTTPS配置下静态资源无法访问的原因是什么？

server {
    listen 80;
    server_name mp.yitiegongfang.com;
    rewrite ^(.*)$ https://${server_name}$1 permanent;
}

server {
    listen       443 ssl;
    server_name  mp.yitiegongfang.com;

    # HTTPS配置
    ssl_certificate /www/crt/1_mp.yitiegongfang.com_bundle.crt;
    ssl_certificate_key /www/crt/2_mp.yitiegongfang.com.key;
    ssl_session_timeout 5m;
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:HIGH:!aNULL:!MD5:!RC4:!DHE;
    ssl_prefer_server_ciphers on;

    charset utf-8;
    access_log  /root/go/src/easy_wallpaper_api/access.log;

    location /(css|js|fonts|img)/ {
        access_log off;
        expires 1d;
        root "/root/go/src/easy_wallpaper_api/static";
        try_files $uri @backend;
    }

    location / {
        try_files /_not_exists_ @backend;
    }

    location @backend {
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header Host            $http_host;
        proxy_pass http://127.0.0.1:8066;
    }
}