cloud: remove non-Premium content and add Premium-specific links

TOC-tidb-cloud-premium.md

@@ -146,7 +146,6 @@
     - [Configure an IP Access List](/tidb-cloud/premium/configure-ip-access-list-premium.md)
     - [Connect via Private Endpoint with AWS](/tidb-cloud/premium/connect-to-premium-via-aws-private-endpoint.md)
     - [Connect via Private Endpoint with Alibaba Cloud](/tidb-cloud/premium/connect-to-premium-via-alibaba-cloud-private-endpoint.md)
-    - [Configure Firewall Rules for Public Endpoints](/tidb-cloud/configure-serverless-firewall-rules-for-public-endpoints.md)
     - [TLS Connections to TiDB Cloud](/tidb-cloud/premium/tidb-cloud-tls-connect-to-premium.md)
   - Data Access Control
     - [Dual-Layer Data Encryption](/tidb-cloud/premium/dual-layer-data-encryption-premium.md)
@@ -172,15 +171,6 @@
   - [n8n](/tidb-cloud/integrate-tidbcloud-with-n8n.md)
   - [Netlify](/tidb-cloud/integrate-tidbcloud-with-netlify.md)
   - [ProxySQL](/develop/dev-guide-proxysql-integration.md)
-  - Terraform
-    - [Terraform Integration Overview](/tidb-cloud/terraform-tidbcloud-provider-overview.md)
-    - [Get TiDB Cloud Terraform Provider](/tidb-cloud/terraform-get-tidbcloud-provider.md)
-    - [Use the `tidbcloud_serverless_cluster` Resource](/tidb-cloud/terraform-use-serverless-cluster-resource-manage-essential.md)
-    - [Use the `tidbcloud_serverless_branch` Resource](/tidb-cloud/terraform-use-serverless-branch-resource.md)
-    - [Use the `tidbcloud_serverless_export` Resource](/tidb-cloud/terraform-use-serverless-export-resource.md)
-    - [Use the `tidbcloud_sql_user` Resource](/tidb-cloud/terraform-use-sql-user-resource.md)
-    - [Use the `tidbcloud_import` Resource](/tidb-cloud/terraform-use-import-resource.md)
-    - [Migrate Cluster Resource](/tidb-cloud/terraform-migrate-cluster-resource.md)
   - [Vercel](/tidb-cloud/integrate-tidbcloud-with-vercel.md)
   - [Zapier](/tidb-cloud/integrate-tidbcloud-with-zapier.md)
 

tidb-cloud/backup-and-restore-concepts.md

@@ -14,6 +14,7 @@ In TiDB Cloud, snapshot backups are taken automatically by default and stored ac
 For more information, see the following:
 
 - [Automatic backups for {{{ .starter }}} and {{{ .essential }}} instances](/tidb-cloud/backup-and-restore-serverless.md#automatic-backups)
+- [Automatic backups for {{{ .premium }}} instances](/tidb-cloud/premium/backup-and-restore-premium.md#automatic-backups)
 - [Automatic backups for TiDB Cloud Dedicated clusters](/tidb-cloud/backup-and-restore.md#turn-on-auto-backup)
 
 ## Manual backup

tidb-cloud/integrate-tidbcloud-with-vercel.md

@@ -71,7 +71,7 @@ To connect via the TiDB Cloud Vercel integration, go to the [TiDB Cloud integrat
 
 > **Note:**
 >
-> This method is only available for {{{ .starter }}} and {{{ .essential }}} instances. If you want to connect to a TiDB Cloud Dedicated cluster, use the [manual method](#connect-via-manually-setting-environment-variables).
+> This method is only available for {{{ .starter }}} and {{{ .essential }}} instances. If you want to connect to a TiDB Cloud Dedicated cluster or a TiDB Cloud Premium instance, use the [manual method](#connect-via-manually-setting-environment-variables).
 
 ### Integration workflow
 

tidb-cloud/scalability-concepts.md

@@ -9,6 +9,7 @@ TiDB Cloud offers multiple deployment options with flexible scalability to meet
 
 - [{{{ .starter }}}](/tidb-cloud/select-cluster-tier.md#starter) is ideal for prototyping, development, and early-stage workloads. It provides a simplified, cost-effective way to get started with TiDB Cloud, with automatic scaling built in.
 - [{{{ .essential }}}](/tidb-cloud/select-cluster-tier.md#essential) is built for production workloads that require more robust scalability and predictable performance under growing traffic or data volume.
+- [{{{ .premium }}}](/tidb-cloud/select-cluster-tier.md#premium) is designed for mission-critical businesses that demand unlimited real-time scalability. It delivers workload-aware auto-scaling and comprehensive enterprise capabilities.
 - TiDB Cloud Dedicated lets you adjust its compute and storage resources separately to match your data volume or workload changes. TiDB Cloud Dedicated can do scaling without any service disruption. This flexibility allows organizations to optimize their infrastructure costs while maintaining high performance and availability.
 
 > **Tip:**

tidb-cloud/tidb-cloud-faq.md

@@ -66,6 +66,8 @@ The best way to learn about TiDB Cloud is to follow our step-by-step tutorial. C
 - [TiDB Cloud Introduction](/tidb-cloud/tidb-cloud-intro.md)
 - [Get Started](/tidb-cloud/tidb-cloud-quickstart.md)
 - [Create a {{{ .starter }}} or Essential Instance](/tidb-cloud/create-tidb-cluster-serverless.md)
+- [Create a {{{ .premium }}} Instance](/tidb-cloud/premium/create-tidb-instance-premium.md)
+- [Create a TiDB Cloud Dedicated Cluster](/tidb-cloud/create-tidb-cluster.md)
 
 ### What does `XXX's Org/default project/Cluster0` refer to when deleting a cluster?
 
@@ -154,7 +156,7 @@ No. TiDB Cloud is Database-as-a-Service (DBaaS) and runs only in the TiDB Cloud
 
 ### Is my TiDB Cloud resource secure?
 
-In TiDB Cloud, you can use a TiDB Cloud Dedicated cluster, a {{{ .starter }}} instance, or a {{{ .essential }}} instance according to your needs.
+In TiDB Cloud, you can use a TiDB Cloud Dedicated cluster, a {{{ .premium }}} instance, a {{{ .starter }}} instance, or a {{{ .essential }}} instance according to your needs.
 
 For TiDB Cloud Dedicated clusters, TiDB Cloud ensures cluster security with the following measures:
 

tidb-cloud/tidb-cloud-sql-tuning-overview.md

@@ -101,6 +101,8 @@ If you still cannot get better performance based on SQL performance tuning, you
 
 For more information on how to locate and resolve transaction conflicts, see [Troubleshoot Lock Conflicts](https://docs.pingcap.com/tidb/stable/troubleshoot-lock-conflicts#troubleshoot-lock-conflicts).
 
+<CustomContent plan="starter,essential,dedicated">
+
 ### Hotspot issues
 
 You can analyze hotspot issues using [Key Visualizer](/tidb-cloud/tune-performance.md#key-visualizer).
@@ -123,3 +125,5 @@ In Key Visualizer, there are [four common heat map results](https://docs.pingcap
 In both cases of X-axis and Y-axis alternating bright and dark, you need to address read and write pressure.
 
 For more information about SQL performance optimization, see [SQL Optimization](https://docs.pingcap.com/tidb/stable/sql-faq#sql-optimization) in SQL FAQs.
+
+</CustomContent>