Merge branch 'feature_student' into release/4.9.1.0

# Conflicts:
#	apps/product/models/detail.js
#	config/common.js
#	public/scss/common/_good.css

@@ -91,16 +91,16 @@ const getPlatForm = (req) => {
     let userAgent = req.get('User-Agent');
     let yoho = {};
     let uids = req.get('User-Agent').match(/uid=([^;]+)/i);
-    let arrs=[];
+    let arrs = [];
     let version = false;
     const isProduction = process.env.NODE_ENV === 'production';
 
     yoho.isiOS = /\(i[^;]+;( U;)? CPU.+Mac OS X/i.test(userAgent);
     yoho.isAndroid = /Android/i.test(userAgent);
     yoho.isApp = /YohoBuy/i.test(req.get('User-Agent')) || (req.query.app_version && req.query.client_type);
-    if(req.query.app_version){
+    if (req.query.app_version) {
         arrs = req.query.app_version.split('.');
-        version = arrs.length>2 && Number(arrs.slice(0,2)+ arrs[2].slice(0,1))>490;
+        version = arrs.length > 2 && Number(arrs.slice(0, 2).join('') + arrs[2].slice(0, 1)) > 490;
     }
 
 
@@ -260,7 +260,7 @@ exports.index = (req, res, next) => {
                         options.loginUrl = options.loginUrl + '?openby:yohobuy={"action":"go.h5","params":{"islogin":"N","url":"' + req.__USER__.http + '//m.yohobuy.com/activity/student/register"}}';
                     }
                 } else {
-                    //no login
+                    // no login
                     options.loginUrl = options.loginUrl + '?openby:yohobuy={"action":"go.weblogin","params":{"jumpurl":{"url":"' + req.__USER__.http + '//m.yohobuy.com/activity/student/register"}}}';
                 }
             } else {