update footer, header and introduction

Signed-off-by: FeynmanZhou <pengfeizhou@yunify.com>

content/en/docs/introduction/what-is-kubesphere.md

@@ -8,7 +8,7 @@ weight: 1100
 
 ## Overview
 
-KubeSphere is a **distributed operating system managing cloud-native applications** with [Kubernetes](https://kubernetes.io) as its kernel. It provides a plug-and-play architecture for the seamless integration of third-party applications to boost its ecosystem.
+KubeSphere is a **distributed operating system for cloud-native application management**, using [Kubernetes](https://kubernetes.io) as its kernel. It provides a plug-and-play architecture, allowing third-party applications to be seamlessly integrated into its ecosystem.
 
 KubeSphere also represents a multi-tenant enterprise-grade [Kubernetes container platform](https://kubesphere.io) with full-stack automated IT operation and streamlined [DevOps workflows](https://kubesphere.io/devops/). It provides developer-friendly wizard web UI, helping enterprises to build out a robust and feature-rich platform. It boasts the most common functionalities needed for enterprise Kubernetes strategies, such as **Kubernetes resource management**, **DevOps (CI/CD)**, **application lifecycle management**, **monitoring**, **logging**, **service mesh**, **multi-tenancy**, **alerting and notification**, **auditing**, **storage and networking**, **autoscaling**, **access control**, **GPU support**, **multi-cluster deployment and management**, **network policy**, **registry management**, and **security management**.
 

data/en/footer.yaml

@@ -63,6 +63,8 @@ footer:
           link: 'https://aws.amazon.com/quickstart/architecture/qingcloud-kubesphere/'
         - content: KubeSphere on Azure
           link: 'https://market.azure.cn/marketplace/apps/qingcloud.kubesphere'
+        - content: KubeSphere on DigitalOcean
+          link: 'https://marketplace.digitalocean.com/apps/kubesphere'
         - content: KubeSphere on QingCloud(QKE)
           link: 'https://www.qingcloud.com/products/kubesphereqke'
         - content: KubeSphere Virtualization Platform

data/zh/footer.yaml

@@ -70,6 +70,8 @@ footer:
           link: 'https://aws.amazon.com/cn/quickstart/architecture/qingcloud-kubesphere/'
         - content: KubeSphere on Azure
           link: 'https://market.azure.cn/marketplace/apps/qingcloud.kubesphere'
+        - content: KubeSphere on DigitalOcean
+          link: 'https://marketplace.digitalocean.com/apps/kubesphere'
         - content: KubeSphere on QingCloud(QKE)
           link: 'https://www.qingcloud.com/products/kubesphereqke'
         - content: KubeSphere 虚拟化平台

layouts/partials/header.html

@@ -11,7 +11,7 @@
     {{ if eq .Site.Language.Lang "en"}}
     <div class="join-div">
         <div class="content">
-            🚀 KubeSphere 3.1.0 is now generally available as it extends Kubernetes from the cloud to the edge. <a href={{"/blogs/kubesphere-3.1.0-ga-announcement/" | relLangURL }} target="_blank" rel="noopener noreferrer">Read the GA Announcement for 3.1.0 →</a>
+            🚀 KubeSphere 3.1.1 is now available as it extends Kubernetes from the cloud to the edge. <a href={{"/blogs/kubesphere-3.1.0-ga-announcement/" | relLangURL }} target="_blank" rel="noopener noreferrer">Read the introduction for 3.1.x →</a>
             <img id="close-join" src="/images/header/close.svg" alt="close">
         </div>
     </div>