diff --git a/common/common.css b/common/common.css
index 451ad44..875dd71 100644
--- a/common/common.css
+++ b/common/common.css
@@ -129,6 +129,38 @@
   color: rgba(220, 228, 240, 0.9);
 }
 
+/* 语言切换按钮 */
+.lang-switch {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  padding: 6px 12px;
+  margin-left: 12px;
+  border-radius: 6px;
+  cursor: pointer;
+  color: rgba(220, 228, 240, 0.85);
+  font-size: 13px;
+  font-weight: 500;
+  transition: background 0.15s ease, color 0.15s ease;
+  user-select: none;
+  background: rgba(255, 255, 255, 0.06);
+  border: 1px solid rgba(255, 255, 255, 0.08);
+}
+
+.lang-switch:hover {
+  background: rgba(255, 255, 255, 0.12);
+  color: #fff;
+}
+
+.lang-switch .lang-icon {
+  font-size: 15px;
+  line-height: 1;
+}
+
+.lang-switch .lang-text {
+  font-weight: 600;
+}
+
 .breadcrumb {
   padding-left: 0;
   margin-bottom: 8px;
diff --git a/header.html b/header.html
index fc3bece..fbed475 100644
--- a/header.html
+++ b/header.html
@@ -105,6 +105,7 @@
 
   <script src="/web/BlackFruit-web/common/common.js"></script>
   <script src="/web/BlackFruit-web/js/nav-third-level.js"></script>
+  <script src="/web/BlackFruit-web/js/i18n.js"></script>
   <script src="/web/BlackFruit-web/js/ai.js"></script>
 
   <link rel="alternate" hreflang="zh-Hans" href="{$url}">
diff --git a/index.html b/index.html
index 835f596..2358e27 100644
--- a/index.html
+++ b/index.html
@@ -58,12 +58,25 @@
           <div class="section-content">
             <div class="title-wrapper">
               <div class="banner-tags">
-                <span class="banner-tag-pill"><span>云计算</span></span>
-                <span class="banner-tag-pill"><span>高性价比</span></span>
+                <span class="banner-tag-pill"><span data-i18n="banner_tag_cloud">云计算</span></span>
+                <span class="banner-tag-pill"><span data-i18n="banner_tag_value">高性价比</span></span>
               </div>
-              <h1>中小企业的云计算底座</h1>
+              <h1 data-i18n="banner_title_1">中小企业的云计算底座</h1>
             </div>
-            <p class="banner-desc">主题云聚焦中小企业的数智化转型进程，以技术和数据为驱动，以产品和场景为载体，专注于打磨云上业务服务能力，助力中小企业全面业务上云演化。</p>
+            <p class="banner-desc" data-i18n="banner_desc_1">主题云聚焦中小企业的数智化转型进程，以技术和数据为驱动，以产品和场景为载体，专注于打磨云上业务服务能力，助力中小企业全面业务上云演化。</p>
+            <div class="btn btn2 btn-normal" data-i18n="banner_btn">立即查看</div>
+          </div>
+        </div>
+        <div class="swiper-slide" style="background-image: url('/web/BlackFruit-web/assets/img/index/1@2x.png');">
+          <div class="section-content">
+            <div class="title-wrapper">
+              <div class="banner-tags">
+                <span class="banner-tag-pill"><span data-i18n="banner_tag_elastic">弹性伸缩</span></span>
+                <span class="banner-tag-pill"><span data-i18n="banner_tag_stable">安全稳定</span></span>
+              </div>
+              <h1 data-i18n="banner_title_2">企业级云服务解决方案</h1>
+            </div>
+            <p class="banner-desc" data-i18n="banner_desc_2">提供高性能、高可用的云计算服务，支持弹性伸缩，按需付费，助力企业数字化转型。</p>
             <div class="btn btn2 btn-normal">立即查看</div>
           </div>
         </div>
@@ -71,24 +84,11 @@
           <div class="section-content">
             <div class="title-wrapper">
               <div class="banner-tags">
-                <span class="banner-tag-pill"><span>弹性伸缩</span></span>
-                <span class="banner-tag-pill"><span>安全稳定</span></span>
+                <span class="banner-tag-pill"><span data-i18n="banner_tag_global">全球部署</span></span>
               </div>
-              <h1>企业级云服务解决方案</h1>
+              <h1 data-i18n="banner_title_3">全球云基础设施</h1>
             </div>
-            <p class="banner-desc">提供高性能、高可用的云计算服务，支持弹性伸缩，按需付费，助力企业数字化转型。</p>
-            <div class="btn btn2 btn-normal">立即查看</div>
-          </div>
-        </div>
-        <div class="swiper-slide" style="background-image: url('/web/BlackFruit-web/assets/img/index/1@2x.png');">
-          <div class="section-content">
-            <div class="title-wrapper">
-              <div class="banner-tags">
-                <span class="banner-tag-pill"><span>全球部署</span></span>
-              </div>
-              <h1>全球云基础设施</h1>
-            </div>
-            <p class="banner-desc">覆盖全球20+地区，60+可用区，500+CDN节点，为您提供低延迟、高可用的云服务体验。</p>
+            <p class="banner-desc" data-i18n="banner_desc_3">覆盖全球20+地区，60+可用区，500+CDN节点，为您提供低延迟、高可用的云服务体验。</p>
             <div class="btn btn2 btn-normal">立即查看</div>
           </div>
         </div>
@@ -103,32 +103,32 @@
           <img src="/web/BlackFruit-web/assets/picture_DyJDf/remoteL17140335436547.png" alt="icon"
             class="banner-item-icon" loading="lazy">
           <div class="banner-item-content">
-            <h5>新用户最低可<span class="highlight">5折</span>优惠</h5>
-            <p class="title-desc mt-10 mb-10">无数个人用户的共同选择</p>
+            <h5 data-i18n="promo_new_user">新用户最低可<span class="highlight">5折</span>优惠</h5>
+            <p class="title-desc mt-10 mb-10" data-i18n="promo_new_user_desc">无数个人用户的共同选择</p>
           </div>
         </div>
         <div class="banner-item" id="domain-box">
           <img src="/web/BlackFruit-web/assets/picture_DyJDf/remoteL17140335436547.png" alt="icon"
             class="banner-item-icon" loading="lazy">
           <div class="banner-item-content">
-            <h5>域名<span class="highlight">低至9元</span>起</h5>
-            <p class="title-desc mt-10 mb-10">优选主流域名注册服务</p>
+            <h5 data-i18n="promo_domain">域名<span class="highlight">低至9元</span>起</h5>
+            <p class="title-desc mt-10 mb-10" data-i18n="promo_domain_desc">优选主流域名注册服务</p>
           </div>
         </div>
         <div class="banner-item" id="cps-box">
           <img src="/web/BlackFruit-web/assets/picture_DyJDf/remoteL17140335436547.png" alt="icon"
             class="banner-item-icon" loading="lazy">
           <div class="banner-item-content">
-            <h5>推广最高<span class="highlight">35%</span>佣金</h5>
-            <p class="title-desc mt-10 mb-10">多种产品高额返佣</p>
+            <h5 data-i18n="promo_cps">推广最高<span class="highlight">35%</span>佣金</h5>
+            <p class="title-desc mt-10 mb-10" data-i18n="promo_cps_desc">多种产品高额返佣</p>
           </div>
         </div>
         <div class="banner-item" id="logon-box">
           <img src="/web/BlackFruit-web/assets/picture_DyJDf/remoteL17140335436547.png" alt="icon"
             class="banner-item-icon" loading="lazy">
           <div class="banner-item-content">
-            <h5>注册送<span class="highlight">2000元</span>礼包</h5>
-            <p class="title-desc mt-10 mb-10">免费注册领取专属礼包</p>
+            <h5 data-i18n="promo_register">注册送<span class="highlight">2000元</span>礼包</h5>
+            <p class="title-desc mt-10 mb-10" data-i18n="promo_register_desc">免费注册领取专属礼包</p>
           </div>
         </div>
       </div>
@@ -139,21 +139,21 @@
     <div class="hot-products">
       <div class="section-content">
         <div class="hot-products-title">
-          <h3>热销产品推荐</h3>
-          <p class="subtitle">高性价比云服务器，助力您的业务快速上云</p>
+          <h3 data-i18n="hot_title">热销产品推荐</h3>
+          <p class="subtitle" data-i18n="hot_subtitle">高性价比云服务器，助力您的业务快速上云</p>
 
           <!-- Products Grid -->
           <div class="products-grid hot-products-list">
             <!-- 产品卡片 1 -->
             <div class="product-card">
               <div class="product-card-header">
-                <h4 class="product-name">香港弹性云</h4>
+                <h4 class="product-name" data-i18n="product_hk_elastic">香港弹性云</h4>
                 <div class="product-badges">
-                  <span class="product-badge badge-hot">热销</span>
+                  <span class="product-badge badge-hot" data-i18n="badge_hot">热销</span>
                   <span class="product-badge badge-promo">V0新春专享</span>
                 </div>
               </div>
-              <p class="product-desc">稳定、安全、高效、易用，可存储任意类型和形式的非结构化数据</p>
+              <p class="product-desc" data-i18n="product_desc_storage">稳定、安全、高效、易用，可存储任意类型和形式的非结构化数据</p>
               <div class="product-specs">
                 <span class="spec-item">2核CPU</span>
                 <span class="spec-divider">|</span>
@@ -171,18 +171,18 @@
                 </div>
                 <span class="price-limit">限购1台</span>
               </div>
-              <a href="./cloud.html" class="product-buy-btn">立即购买</a>
+              <a href="./cloud.html" class="product-buy-btn" data-i18n="btn_buy">立即购买</a>
             </div>
 
             <!-- 产品卡片 2 -->
             <div class="product-card">
               <div class="product-card-header">
-                <h4 class="product-name">美国高防云</h4>
+                <h4 class="product-name" data-i18n="product_us_defense">美国高防云</h4>
                 <div class="product-badges">
                   <span class="product-badge badge-promo">V0新春专享</span>
                 </div>
               </div>
-              <p class="product-desc">稳定、安全、高效、易用，可承载任意规模和形式的非结构化数据</p>
+              <p class="product-desc" data-i18n="product_desc_scale">稳定、安全、高效、易用，可承载任意规模和形式的非结构化数据</p>
               <div class="product-specs">
                 <span class="spec-item">4核CPU</span>
                 <span class="spec-divider">|</span>
@@ -206,9 +206,9 @@
             <!-- 产品卡片 3 -->
             <div class="product-card">
               <div class="product-card-header">
-                <h4 class="product-name">新加坡CN2云</h4>
+                <h4 class="product-name" data-i18n="product_sg_cn2">新加坡CN2云</h4>
                 <div class="product-badges">
-                  <span class="product-badge badge-recommend">推荐</span>
+                  <span class="product-badge badge-recommend" data-i18n="badge_recommend">推荐</span>
                   <span class="product-badge badge-promo">V0新春专享</span>
                 </div>
               </div>
@@ -236,7 +236,7 @@
             <!-- 产品卡片 4 -->
             <div class="product-card">
               <div class="product-card-header">
-                <h4 class="product-name">日本BGP云</h4>
+                <h4 class="product-name" data-i18n="product_jp_bgp">日本BGP云</h4>
                 <div class="product-badges">
                   <span class="product-badge badge-promo">V0新春专享</span>
                 </div>
@@ -265,12 +265,12 @@
             <!-- 产品卡片 5 -->
             <div class="product-card">
               <div class="product-card-header">
-                <h4 class="product-name">韩国CN2云</h4>
+                <h4 class="product-name" data-i18n="product_kr_cn2">韩国CN2云</h4>
                 <div class="product-badges">
                   <span class="product-badge badge-hot">热销</span>
                 </div>
               </div>
-              <p class="product-desc">低延迟、高速度，适合游戏、视频等对网络质量要求高的业务</p>
+              <p class="product-desc" data-i18n="product_desc_kr">低延迟、高速度，适合游戏、视频等对网络质量要求高的业务</p>
               <div class="product-specs">
                 <span class="spec-item">4核CPU</span>
                 <span class="spec-divider">|</span>
@@ -294,12 +294,12 @@
             <!-- 产品卡片 6 -->
             <div class="product-card">
               <div class="product-card-header">
-                <h4 class="product-name">国内BGP云</h4>
+                <h4 class="product-name" data-i18n="product_cn_bgp">国内BGP云</h4>
                 <div class="product-badges">
-                  <span class="product-badge badge-promo">特惠</span>
+                  <span class="product-badge badge-promo" data-i18n="badge_promo">特惠</span>
                 </div>
               </div>
-              <p class="product-desc">多线BGP接入，覆盖全国各地区，访问速度快，稳定性高</p>
+              <p class="product-desc" data-i18n="product_desc_cn">多线BGP接入，覆盖全国各地区，访问速度快，稳定性高</p>
               <div class="product-specs">
                 <span class="spec-item">2核CPU</span>
                 <span class="spec-divider">|</span>
@@ -323,12 +323,12 @@
             <!-- 产品卡片 7 -->
             <div class="product-card">
               <div class="product-card-header">
-                <h4 class="product-name">镇江高防云</h4>
+                <h4 class="product-name" data-i18n="product_zj_defense">镇江高防云</h4>
                 <div class="product-badges">
-                  <span class="product-badge badge-recommend">高防</span>
+                  <span class="product-badge badge-recommend" data-i18n="badge_defense">高防</span>
                 </div>
               </div>
-              <p class="product-desc">T级防御能力，有效抵御各类DDoS攻击，保障业务连续性</p>
+              <p class="product-desc" data-i18n="product_desc_defense">T级防御能力，有效抵御各类DDoS攻击，保障业务连续性</p>
               <div class="product-specs">
                 <span class="spec-item">8核CPU</span>
                 <span class="spec-divider">|</span>
@@ -352,12 +352,12 @@
             <!-- 产品卡片 8 -->
             <div class="product-card">
               <div class="product-card-header">
-                <h4 class="product-name">宿迁BGP云</h4>
+                <h4 class="product-name" data-i18n="product_sq_bgp">宿迁BGP云</h4>
                 <div class="product-badges">
-                  <span class="product-badge badge-promo">上新</span>
+                  <span class="product-badge badge-promo" data-i18n="badge_new">上新</span>
                 </div>
               </div>
-              <p class="product-desc">全新BGP线路，性价比极高，适合个人站长及中小企业</p>
+              <p class="product-desc" data-i18n="product_desc_sq">全新BGP线路，性价比极高，适合个人站长及中小企业</p>
               <div class="product-specs">
                 <span class="spec-item">4核CPU</span>
                 <span class="spec-divider">|</span>
@@ -415,33 +415,33 @@
   <section class="section section-bg resolve">
     <div class="section-content">
       <div class="section-title">
-        <h2>全场景全栈解决方案</h2>
-        <div class="section-desc">专业构架师针对丰富的业务场景，为千行百业构建稳定、易用的高性价比解决方案。</div>
+        <h2 data-i18n="solution_title">全场景全栈解决方案</h2>
+        <div class="section-desc" data-i18n="solution_desc">专业构架师针对丰富的业务场景，为千行百业构建稳定、易用的高性价比解决方案。</div>
       </div>
       <!-- 新设计：上下两层布局 -->
       <div class="solution-wrapper">
         <!-- 上层：按钮导航 -->
         <div class="solution-tabs">
           <button class="solution-tab active" data-index="0">
-            <span>电商</span>
+            <span data-i18n="tab_ecommerce">电商</span>
           </button>
           <button class="solution-tab" data-index="1">
-            <span>金融</span>
+            <span data-i18n="tab_finance">金融</span>
           </button>
           <button class="solution-tab" data-index="2">
-            <span>游戏</span>
+            <span data-i18n="tab_game">游戏</span>
           </button>
           <button class="solution-tab" data-index="3">
-            <span>文旅</span>
+            <span data-i18n="tab_travel">文旅</span>
           </button>
           <button class="solution-tab" data-index="4">
-            <span>教育</span>
+            <span data-i18n="tab_education">教育</span>
           </button>
           <button class="solution-tab" data-index="5">
-            <span>医疗</span>
+            <span data-i18n="tab_medical">医疗</span>
           </button>
           <button class="solution-tab" data-index="6">
-            <span>农业</span>
+            <span data-i18n="tab_agriculture">农业</span>
           </button>
         </div>
 
@@ -603,21 +603,21 @@
   <section class="section section-base">
     <div class="section-content">
       <div class="section-title">
-        <h2>安全合规、高速稳定的基础设施</h2>
+        <h2 data-i18n="infra_title">安全合规、高速稳定的基础设施</h2>
       </div>
       <div class="fboxRow base">
         <div class="base-content mt-40">
           <div class="fboxRow Ycenter mb-30">
-            <h2>20+</h2><span class="title-desc ml-10">国家地理区域</span>
+            <h2>20+</h2><span class="title-desc ml-10" data-i18n="infra_regions">国家地理区域</span>
           </div>
           <div class="fboxRow Ycenter mb-30">
-            <h2>60+</h2><span class="title-desc ml-10">可用区</span>
+            <h2>60+</h2><span class="title-desc ml-10" data-i18n="infra_zones">可用区</span>
           </div>
           <div class="fboxRow Ycenter mb-30">
-            <h2>500+</h2><span class="title-desc ml-10">全球CDN节点</span>
+            <h2>500+</h2><span class="title-desc ml-10" data-i18n="infra_cdn">全球CDN节点</span>
           </div>
           <div class="fboxRow Ycenter mb-30">
-            <h2>1T+</h2><span class="title-desc ml-10">可承载DDOS攻击</span>
+            <h2>1T+</h2><span class="title-desc ml-10" data-i18n="infra_ddos">可承载DDOS攻击</span>
           </div>
 
         </div>
@@ -629,8 +629,8 @@
     <div class="honor-section">
       <div class="section-content">
         <div class="honor-title">
-          <h3>企业资质与荣誉</h3>
-          <p class="honor-subtitle">实体企业,资质齐全,技术独立<br>国三资资质证书+增值电信业务经营许可证(ISP资质)+其他资质齐全,可帮助用户办理ICP备案、公安备案等</p>
+          <h3 data-i18n="honor_title">企业资质与荣誉</h3>
+          <p class="honor-subtitle" data-i18n="honor_subtitle">实体企业,资质齐全,技术独立<br>国三资资质证书+增值电信业务经营许可证(ISP资质)+其他资质齐全,可帮助用户办理ICP备案、公安备案等</p>
         </div>
 
         <!-- 网格布局容器 -->
@@ -647,14 +647,14 @@
   <section class="section news">
     <div class="section-content">
       <div class="section-title">
-        <h2>新动向，新机遇</h2>
-        <div class="section-desc">最新发展动态、最热行业资讯，与主题云一起见证云时代精彩瞬间</div>
+        <h2 data-i18n="news_title">新动向，新机遇</h2>
+        <div class="section-desc" data-i18n="news_desc">最新发展动态、最热行业资讯，与主题云一起见证云时代精彩瞬间</div>
       </div>
       <div class="news-content fboxWrap">
         <div class="news-cont">
           <div class="news-head fboxRow Xbetween Yend">
-            <div class="news-title">官方公告</div>
-            <div class="news-more"><a href="./announce.html">更多</a><span class="iconfont icon-arrow-right"></span></div>
+            <div class="news-title" data-i18n="news_announcement">官方公告</div>
+            <div class="news-more"><a href="./announce.html" data-i18n="news_more">更多</a><span class="iconfont icon-arrow-right"></span></div>
           </div>
           <div class="news-list" id="announceList">
 
@@ -663,8 +663,8 @@
 
         <div class="news-cont">
           <div class="news-head fboxRow Xbetween Yend">
-            <div class="news-title">新闻资讯</div>
-            <div class="news-more"><a href="./news.html">更多</a><span class="iconfont icon-arrow-right"></span></div>
+            <div class="news-title" data-i18n="news_info">新闻资讯</div>
+            <div class="news-more"><a href="./news.html" data-i18n="news_more">更多</a><span class="iconfont icon-arrow-right"></span></div>
           </div>
           <div class="news-list" id="newsList">
           </div>
diff --git a/js/i18n.js b/js/i18n.js
new file mode 100644
index 0000000..b344256
--- /dev/null
+++ b/js/i18n.js
@@ -0,0 +1,351 @@
+/**
+ * i18n.js — 轻量国际化引擎
+ * 用法：给 HTML 元素加 data-i18n="key" 属性，调用 i18n.setLang('en') 切换
+ */
+(function () {
+  'use strict';
+
+  var i18n = {};
+
+  // 语言字典
+  i18n.dict = {
+    zh: {
+      // === Header ===
+      nav_console: '控制台',
+      nav_login: '登录',
+      nav_register: '立即注册',
+      lang_label: '中',
+
+      // === Banner 占位 ===
+      banner_tag_cloud: '云计算',
+      banner_tag_value: '高性价比',
+      banner_title_1: '中小企业的云计算底座',
+      banner_desc_1: '主题云聚焦中小企业的数智化转型进程，以技术和数据为驱动，以产品和场景为载体，专注于打磨云上业务服务能力，助力中小企业全面业务上云演化。',
+      banner_btn: '立即查看',
+      banner_tag_elastic: '弹性伸缩',
+      banner_tag_stable: '安全稳定',
+      banner_title_2: '企业级云服务解决方案',
+      banner_desc_2: '提供高性能、高可用的云计算服务，支持弹性伸缩，按需付费，助力企业数字化转型。',
+      banner_tag_global: '全球部署',
+      banner_title_3: '全球云基础设施',
+      banner_desc_3: '覆盖全球20+地区，60+可用区，500+CDN节点，为您提供低延迟、高可用的云服务体验。',
+
+      // === Banner 下方卡片 ===
+      promo_new_user: '新用户最低可<span class="highlight">5折</span>优惠',
+      promo_new_user_desc: '无数个人用户的共同选择',
+      promo_domain: '域名<span class="highlight">低至9元</span>起',
+      promo_domain_desc: '优选主流域名注册服务',
+      promo_cps: '推广最高<span class="highlight">35%</span>佣金',
+      promo_cps_desc: '多种产品高额返佣',
+      promo_register: '注册送<span class="highlight">2000元</span>礼包',
+      promo_register_desc: '免费注册领取专属礼包',
+
+      // === 热销产品 ===
+      hot_title: '热销产品推荐',
+      hot_subtitle: '高性价比云服务器，助力您的业务快速上云',
+      badge_hot: '热销',
+      badge_recommend: '推荐',
+      badge_promo: '特惠',
+      badge_new: '上新',
+      badge_defense: '高防',
+      btn_buy: '立即购买',
+      price_limit: '限购1台',
+      btn_more_products: '查看更多产品',
+      btn_collapse_products: '收起产品',
+
+      // === 产品名 ===
+      product_hk_elastic: '香港弹性云',
+      product_us_defense: '美国高防云',
+      product_sg_cn2: '新加坡CN2云',
+      product_jp_bgp: '日本BGP云',
+      product_kr_cn2: '韩国CN2云',
+      product_cn_bgp: '国内BGP云',
+      product_zj_defense: '镇江高防云',
+      product_sq_bgp: '宿迁BGP云',
+
+      // === 产品描述 ===
+      product_desc_storage: '稳定、安全、高效、易用，可存储任意类型和形式的非结构化数据',
+      product_desc_scale: '稳定、安全、高效、易用，可承载任意规模和形式的非结构化数据',
+      product_desc_kr: '低延迟、高速度，适合游戏、视频等对网络质量要求高的业务',
+      product_desc_cn: '多线BGP接入，覆盖全国各地区，访问速度快，稳定性高',
+      product_desc_defense: 'T级防御能力，有效抵御各类DDoS攻击，保障业务连续性',
+      product_desc_sq: '全新BGP线路，性价比极高，适合个人站长及中小企业',
+
+      // === 解决方案 ===
+      solution_title: '全场景全栈解决方案',
+      solution_desc: '专业构架师针对丰富的业务场景，为千行百业构建稳定、易用的高性价比解决方案。',
+      tab_ecommerce: '电商',
+      tab_finance: '金融',
+      tab_game: '游戏',
+      tab_travel: '文旅',
+      tab_education: '教育',
+      tab_medical: '医疗',
+      tab_agriculture: '农业',
+      solution_ecommerce_title: '电商解决方案',
+      solution_ecommerce_sub: '应对高并发、大促等复杂场景',
+      solution_ecommerce_p1: '提供完整的电商云解决方案，有效应对大促、秒杀等高并发场景，保障系统稳定运行。',
+      solution_ecommerce_p2: '通过弹性扩容、智能调度等技术手段，助力电商平台快速响应业务需求，提升用户体验。',
+      solution_ecommerce_p3: '支持多种营销活动场景，实现营销创新与业务增收的双重目标。',
+      solution_finance_title: '金融解决方案',
+      solution_finance_sub: '安全可靠的金融级云服务',
+      solution_finance_p1: '为金融机构提供安全可靠的云计算基础设施，满足金融行业严格的监管要求和安全标准。',
+      solution_finance_p2: '助力金融机构打造面向垂直场景的创新金融产品，实现与用户之间的高效触达。',
+      solution_finance_p3: '提供风险控制、数据分析、智能客服等全方位技术支持，推动金融科技创新。',
+      solution_game_title: '游戏解决方案',
+      solution_game_sub: '低延迟、高并发的游戏云平台',
+      solution_game_p1: '构建高质量、全方位、深度体验的游戏云平台，提供低延迟、高并发的游戏运行环境。',
+      solution_game_p2: '支持游戏快速部署、弹性扩容，满足各类游戏场景需求。',
+      solution_game_p3: '通过智能运维、数据分析等技术手段，提升游戏研发效率，优化玩家游戏体验。',
+      solution_travel_title: '文旅解决方案',
+      solution_travel_sub: '科技赋能智慧文旅',
+      solution_travel_p1: '通过"科技+文化旅游"的深度融合创新及落地应用，推动文旅行业全面信息化、智慧化发展。',
+      solution_travel_p2: '提供智慧景区、智慧酒店、智慧旅行社等全场景解决方案，实现景区管理数字化、游客服务智能化。',
+      solution_travel_p3: '利用大数据、人工智能等技术，优化旅游资源配置，提升游客体验。',
+      solution_education_title: '教育解决方案',
+      solution_education_sub: '打造云时代教育新模式',
+      solution_education_p1: '实现教育数据互联互通、教学过程可视化、师生互动高交互的云上教育环境，打造云时代教育治理新模式。',
+      solution_education_p2: '提供在线课堂、智慧校园、教育管理等全方位解决方案，支持大规模在线教学和混合式教学模式。',
+      solution_education_p3: '通过人工智能、大数据等技术，实现个性化教学和精准教学评估。',
+      solution_medical_title: '医疗解决方案',
+      solution_medical_sub: '构建数字化医疗生态',
+      solution_medical_p1: '协助医疗机构打造医疗数据资源共享、医疗资源再利用、医疗知识再生产的数字化医疗生态循环体系。',
+      solution_medical_p2: '提供远程医疗、智慧医院、医疗影像云等解决方案，支持医疗数据安全存储和高效分析。',
+      solution_medical_p3: '通过云计算、人工智能等技术，辅助临床决策，提升医疗服务质量和效率。',
+      solution_agriculture_title: '农业解决方案',
+      solution_agriculture_sub: '推动智慧农业转型升级',
+      solution_agriculture_p1: '助力农业企业构建智慧农业生产服务体系，提升农业精细化种植与智能化管理水平。',
+      solution_agriculture_p2: '提供农业物联网、农产品溯源、智能灌溉等全链条解决方案，实现农业生产全过程数字化监控和管理。',
+      solution_agriculture_p3: '通过大数据分析和人工智能技术，优化种植方案，提高农作物产量和品质。',
+      solution_learn_more: '了解详情',
+
+      // === 基础设施 ===
+      infra_title: '安全合规、高速稳定的基础设施',
+      infra_regions: '国家地理区域',
+      infra_zones: '可用区',
+      infra_cdn: '全球CDN节点',
+      infra_ddos: '可承载DDOS攻击',
+
+      // === 荣誉 ===
+      honor_title: '企业资质与荣誉',
+      honor_subtitle: '实体企业,资质齐全,技术独立<br>国三资资质证书+增值电信业务经营许可证(ISP资质)+其他资质齐全,可帮助用户办理ICP备案、公安备案等',
+
+      // === 新闻 ===
+      news_title: '新动向，新机遇',
+      news_desc: '最新发展动态、最热行业资讯，与主题云一起见证云时代精彩瞬间',
+      news_announcement: '官方公告',
+      news_info: '新闻资讯',
+      news_more: '更多',
+
+      // === 登录菜单 ===
+      menu_account: '账户信息',
+      menu_unpaid: '未付款订单',
+      menu_ticket: '我的工单',
+      menu_logout: '退出账户',
+      menu_not_certified: '未实名',
+      menu_certified: '已实名',
+    },
+
+    en: {
+      // === Header ===
+      nav_console: 'Console',
+      nav_login: 'Login',
+      nav_register: 'Sign Up',
+      lang_label: 'EN',
+
+      // === Banner 占位 ===
+      banner_tag_cloud: 'Cloud',
+      banner_tag_value: 'Cost-effective',
+      banner_title_1: 'Cloud Foundation for SMEs',
+      banner_desc_1: 'Focused on digital transformation for small and medium enterprises, driven by technology and data, delivering reliable cloud services to accelerate your business growth.',
+      banner_btn: 'Learn More',
+      banner_tag_elastic: 'Auto-scaling',
+      banner_tag_stable: 'Secure & Stable',
+      banner_title_2: 'Enterprise Cloud Solutions',
+      banner_desc_2: 'High-performance, highly available cloud computing with elastic scaling and pay-as-you-go pricing to drive digital transformation.',
+      banner_tag_global: 'Global Deploy',
+      banner_title_3: 'Global Cloud Infrastructure',
+      banner_desc_3: 'Over 20 regions, 60+ availability zones, 500+ CDN nodes worldwide for low-latency, highly available cloud services.',
+
+      // === Banner 下方卡片 ===
+      promo_new_user: 'New users get up to <span class="highlight">50% off</span>',
+      promo_new_user_desc: 'Trusted by millions of individual users',
+      promo_domain: 'Domains from <span class="highlight">$1.29</span>',
+      promo_domain_desc: 'Premium domain registration services',
+      promo_cps: 'Earn up to <span class="highlight">35%</span> commission',
+      promo_cps_desc: 'High commissions across all products',
+      promo_register: 'Get <span class="highlight">$300</span> welcome bonus',
+      promo_register_desc: 'Sign up and claim your exclusive bonus',
+
+      // === 热销产品 ===
+      hot_title: 'Best-Selling Products',
+      hot_subtitle: 'High-performance cloud servers to accelerate your business',
+      badge_hot: 'Hot',
+      badge_recommend: 'Recommended',
+      badge_promo: 'Deal',
+      badge_new: 'New',
+      badge_defense: 'DDoS',
+      btn_buy: 'Buy Now',
+      price_limit: 'Limit 1',
+      btn_more_products: 'View More Products',
+      btn_collapse_products: 'Collapse',
+
+      // === 产品名 ===
+      product_hk_elastic: 'Hong Kong Elastic Cloud',
+      product_us_defense: 'US DDoS-Protected Cloud',
+      product_sg_cn2: 'Singapore CN2 Cloud',
+      product_jp_bgp: 'Japan BGP Cloud',
+      product_kr_cn2: 'Korea CN2 Cloud',
+      product_cn_bgp: 'China BGP Cloud',
+      product_zj_defense: 'Zhenjiang DDoS Cloud',
+      product_sq_bgp: 'Suqian BGP Cloud',
+
+      // === 产品描述 ===
+      product_desc_storage: 'Stable, secure, efficient, and user-friendly for storing unstructured data of any type',
+      product_desc_scale: 'Stable, secure, efficient, and user-friendly for workloads of any scale',
+      product_desc_kr: 'Low latency, high speed — ideal for gaming, video, and latency-sensitive applications',
+      product_desc_cn: 'Multi-line BGP access, nationwide coverage, fast speed and high stability',
+      product_desc_defense: 'T-level defense capability, effectively resisting various DDoS attacks',
+      product_desc_sq: 'Brand new BGP lines, extremely cost-effective, ideal for individual webmasters and SMEs',
+
+      // === 解决方案 ===
+      solution_title: 'Full-Stack Solutions for Every Scenario',
+      solution_desc: 'Professional architects build stable, easy-to-use, cost-effective solutions for all industries.',
+      tab_ecommerce: 'E-commerce',
+      tab_finance: 'Finance',
+      tab_game: 'Gaming',
+      tab_travel: 'Tourism',
+      tab_education: 'Education',
+      tab_medical: 'Healthcare',
+      tab_agriculture: 'Agriculture',
+      solution_ecommerce_title: 'E-commerce Solutions',
+      solution_ecommerce_sub: 'Handle high concurrency and flash sales',
+      solution_ecommerce_p1: 'Complete e-commerce cloud solutions for flash sales, promotions, and high-concurrency scenarios.',
+      solution_ecommerce_p2: 'Elastic scaling and intelligent scheduling to help e-commerce platforms respond quickly.',
+      solution_ecommerce_p3: 'Support various marketing scenarios to drive innovation and revenue growth.',
+      solution_finance_title: 'Financial Solutions',
+      solution_finance_sub: 'Secure and reliable financial-grade cloud',
+      solution_finance_p1: 'Secure cloud computing infrastructure that meets strict regulatory requirements.',
+      solution_finance_p2: 'Help financial institutions build innovative products for vertical scenarios.',
+      solution_finance_p3: 'Risk control, data analytics, and intelligent customer service support.',
+      solution_game_title: 'Gaming Solutions',
+      solution_game_sub: 'Low-latency, high-concurrency gaming platform',
+      solution_game_p1: 'Build high-quality gaming cloud platforms with low latency and high concurrency.',
+      solution_game_p2: 'Rapid deployment and elastic scaling for all game types.',
+      solution_game_p3: 'Intelligent operations and data analytics to optimize player experience.',
+      solution_travel_title: 'Tourism Solutions',
+      solution_travel_sub: 'Technology-powered smart tourism',
+      solution_travel_p1: 'Deep integration of technology and cultural tourism for industry-wide digital transformation.',
+      solution_travel_p2: 'Smart scenic areas, smart hotels, and smart travel agencies.',
+      solution_travel_p3: 'Big data and AI to optimize tourism resources and enhance visitor experience.',
+      solution_education_title: 'Education Solutions',
+      solution_education_sub: 'Cloud-era education innovation',
+      solution_education_p1: 'Cloud-based education with data interconnection, visual teaching, and interactive collaboration.',
+      solution_education_p2: 'Online classrooms, smart campuses, and education management at scale.',
+      solution_education_p3: 'AI and big data for personalized teaching and precise assessment.',
+      solution_medical_title: 'Healthcare Solutions',
+      solution_medical_sub: 'Building a digital medical ecosystem',
+      solution_medical_p1: 'Help medical institutions build a digital healthcare ecosystem for data sharing.',
+      solution_medical_p2: 'Telemedicine, smart hospitals, and medical imaging cloud solutions.',
+      solution_medical_p3: 'Cloud computing and AI to assist clinical decisions and improve care quality.',
+      solution_agriculture_title: 'Agriculture Solutions',
+      solution_agriculture_sub: 'Driving smart agriculture transformation',
+      solution_agriculture_p1: 'Build smart agricultural production service systems for precision farming.',
+      solution_agriculture_p2: 'IoT, traceability, and smart irrigation across the entire agricultural chain.',
+      solution_agriculture_p3: 'Big data and AI to optimize planting plans and improve crop yield.',
+      solution_learn_more: 'Learn More',
+
+      // === 基础设施 ===
+      infra_title: 'Secure, Compliant & High-Speed Infrastructure',
+      infra_regions: 'Geographic Regions',
+      infra_zones: 'Availability Zones',
+      infra_cdn: 'Global CDN Nodes',
+      infra_ddos: 'DDoS Protection Capacity',
+
+      // === 荣誉 ===
+      honor_title: 'Certifications & Awards',
+      honor_subtitle: 'Established enterprise with complete certifications and independent technology<br>ISP license, MIIT certification, and various qualifications to assist with ICP and public security filings',
+
+      // === 新闻 ===
+      news_title: 'Latest News & Opportunities',
+      news_desc: 'Stay updated with the latest developments and industry insights',
+      news_announcement: 'Announcements',
+      news_info: 'News',
+      news_more: 'More',
+
+      // === 登录菜单 ===
+      menu_account: 'Account',
+      menu_unpaid: 'Unpaid Orders',
+      menu_ticket: 'My Tickets',
+      menu_logout: 'Logout',
+      menu_not_certified: 'Unverified',
+      menu_certified: 'Verified',
+    }
+  };
+
+  /**
+   * 获取当前语言
+   */
+  i18n.getLang = function () {
+    return localStorage.getItem('lang') || 'zh';
+  };
+
+  /**
+   * 设置语言并更新页面
+   */
+  i18n.setLang = function (lang) {
+    if (!i18n.dict[lang]) return;
+    localStorage.setItem('lang', lang);
+    i18n.apply(lang);
+  };
+
+  /**
+   * 切换语言 (zh ↔ en)
+   */
+  i18n.toggle = function () {
+    var current = i18n.getLang();
+    i18n.setLang(current === 'zh' ? 'en' : 'zh');
+  };
+
+  /**
+   * 应用语言到页面
+   */
+  i18n.apply = function (lang) {
+    lang = lang || i18n.getLang();
+    var dict = i18n.dict[lang];
+    if (!dict) return;
+
+    // 遍历所有 data-i18n 元素
+    var els = document.querySelectorAll('[data-i18n]');
+    for (var idx = 0; idx < els.length; idx++) {
+      var el = els[idx];
+      var key = el.getAttribute('data-i18n');
+      if (dict[key] !== undefined) {
+        // 对包含 HTML 的内容用 innerHTML（如 <span class="highlight">）
+        if (dict[key].indexOf('<') !== -1) {
+          el.innerHTML = dict[key];
+        } else {
+          el.textContent = dict[key];
+        }
+      }
+    }
+
+    // 更新 html lang 属性
+    document.documentElement.lang = lang === 'zh' ? 'zh-CN' : 'en';
+
+    // 更新语言切换按钮文字
+    var langText = document.querySelector('.lang-text');
+    if (langText) {
+      langText.textContent = dict.lang_label || lang.toUpperCase();
+    }
+  };
+
+  // 暴露到全局
+  window.i18n = i18n;
+
+  // DOM 就绪时自动应用
+  if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', function () { i18n.apply(); });
+  } else {
+    i18n.apply();
+  }
+})();
diff --git a/public/header.html b/public/header.html
index 43e6d4c..769f43a 100644
--- a/public/header.html
+++ b/public/header.html
@@ -27,31 +27,36 @@
       </div>
     </div>
     <div class="nav-right">
-      <a href="/document.html" class="nav-text-link nav-desktop-link">文档</a>
-      <span class="nav-divider nav-desktop-link">|</span>
-      <a href="/home.htm" class="nav-text-link nav-desktop-link">控制台</a>
-      <span class="nav-divider nav-desktop-link">|</span>
+      <!-- 未登录状态 -->
       <div class="no-login nav-desktop-link d-none">
-        <span class="nav-text-link" id="loginBtn">登录</span>
+        <span class="nav-text-link" id="loginBtn" data-i18n="nav_login">登录</span>
         <span class="nav-divider">|</span>
         <div class="btn btn-normal" id="registBtn">
           <img src="/web/BlackFruit-web/assets/img/header/liwu.svg" class="regist-icon" alt="Gift">
-          <span class="regist-text">立即注册</span>
+          <span class="regist-text" data-i18n="nav_register">立即注册</span>
         </div>
       </div>
+      <!-- 已登录状态 -->
       <div class="login-in nav-desktop-link d-none">
+        <a href="/home.htm" class="nav-text-link" data-i18n="nav_console">控制台</a>
+        <span class="nav-divider">|</span>
         <div id="headImg" class="head-img"></div>
         <span class="ml-10 font-el1 name" id="username"></span>
         <div class="login-menu animated fadeIn">
-          <div class="login-menu-item" id="accountBtn">账户信息
-            <span class="no-real-name real-name" id="noCertification">未实名</span>
-            <span class="real-name d-none" id="isCertification">已实名</span>
+          <div class="login-menu-item" id="accountBtn"><span data-i18n="menu_account">账户信息</span>
+            <span class="no-real-name real-name" id="noCertification" data-i18n="menu_not_certified">未实名</span>
+            <span class="real-name d-none" id="isCertification" data-i18n="menu_certified">已实名</span>
           </div>
-          <div class="login-menu-item" id="financeBtn">未付款订单</div>
-          <div class="login-menu-item" id="ticketBtn">我的工单</div>
-          <div class="login-menu-item" id="logout">退出账户</div>
+          <div class="login-menu-item" id="financeBtn" data-i18n="menu_unpaid">未付款订单</div>
+          <div class="login-menu-item" id="ticketBtn" data-i18n="menu_ticket">我的工单</div>
+          <div class="login-menu-item" id="logout" data-i18n="menu_logout">退出账户</div>
         </div>
       </div>
+      <!-- 语言切换（始终显示） -->
+      <div class="lang-switch nav-desktop-link" id="langSwitch" onclick="i18n.toggle()">
+        <span class="lang-icon">🌐</span>
+        <span class="lang-text">中</span>
+      </div>
       <!-- 移动端汉堡菜单按钮 -->
       <button class="mobile-menu-toggle" id="mobileMenuToggle" aria-label="Toggle navigation">
         <img src="/web/BlackFruit-web/assets/img/header/bar.svg" alt="Menu" class="mobile-menu-icon">
@@ -171,20 +176,17 @@
       {/if}
       <!-- 分隔线 -->
       <div class="mobile-nav-divider"></div>
-      <!-- 文档和控制台 -->
-      <div class="mobile-nav-item">
-        <a href="/document.html" class="mobile-nav-link">文档</a>
-      </div>
-      <div class="mobile-nav-item">
-        <a href="/home.htm" class="mobile-nav-link">控制台</a>
+      <!-- 控制台（已登录时显示） -->
+      <div class="mobile-nav-item mobile-login-in" style="display: none;">
+        <a href="/home.htm" class="mobile-nav-link" data-i18n="nav_console">控制台</a>
       </div>
       <!-- 登录注册（未登录状态） -->
       <div class="mobile-nav-actions mobile-no-login" style="display: none;">
         <div class="mobile-nav-item">
-          <span class="mobile-nav-link" id="mobileLoginBtn">登录</span>
+          <span class="mobile-nav-link" id="mobileLoginBtn" data-i18n="nav_login">登录</span>
         </div>
         <div class="mobile-nav-item">
-          <div class="mobile-nav-btn" id="mobileRegistBtn">立即注册</div>
+          <div class="mobile-nav-btn" id="mobileRegistBtn" data-i18n="nav_register">立即注册</div>
         </div>
       </div>
       <!-- 用户信息（已登录状态） -->
@@ -195,18 +197,23 @@
           <div class="mobile-user-name" id="mobileUsername"></div>
         </div>
         <div class="mobile-nav-item">
-          <span class="mobile-nav-link" id="mobileAccountBtn">账户信息</span>
+          <span class="mobile-nav-link" id="mobileAccountBtn" data-i18n="menu_account">账户信息</span>
         </div>
         <div class="mobile-nav-item">
-          <span class="mobile-nav-link" id="mobileFinanceBtn">未付款订单</span>
+          <span class="mobile-nav-link" id="mobileFinanceBtn" data-i18n="menu_unpaid">未付款订单</span>
         </div>
         <div class="mobile-nav-item">
-          <span class="mobile-nav-link" id="mobileTicketBtn">我的工单</span>
+          <span class="mobile-nav-link" id="mobileTicketBtn" data-i18n="menu_ticket">我的工单</span>
         </div>
         <div class="mobile-nav-item">
-          <span class="mobile-nav-link" id="mobileLogout">退出账户</span>
+          <span class="mobile-nav-link" id="mobileLogout" data-i18n="menu_logout">退出账户</span>
         </div>
       </div>
+      <!-- 语言切换 -->
+      <div class="mobile-nav-divider"></div>
+      <div class="mobile-nav-item">
+        <span class="mobile-nav-link" onclick="i18n.toggle()">🌐 <span class="lang-text">中</span> / EN</span>
+      </div>
     </div>
   </div>
 </div>