feat(header): 添加微信社交按钮及其弹出提示

- 将微信社交链接更改为可点击的按钮，增强可访问性
- 添加微信二维码弹出提示，改善用户体验
- 更新相关CSS样式以支持新功能

public/themes/dist_static/static/css/common.css

@@ -1058,9 +1058,9 @@ body {
   height: var(--header-t-h);
   max-height: var(--header-t-h);
   padding: 0 3.125rem;
-  overflow: hidden;
+  overflow: visible;
   position: relative;
-  z-index: 2;
+  z-index: 5;
   transition: max-height var(--duration-normal) var(--easing), height var(--duration-normal) var(--easing), padding var(--duration-normal) var(--easing), opacity var(--duration-fast) var(--easing);
 }.site-header__main {
   display: grid;
@@ -1182,6 +1182,76 @@ body {
   height: 1rem;
   flex-shrink: 0;
   color: inherit;
+  text-decoration: none;
+}
+.site-header__social--wechat {
+  position: relative;
+  cursor: pointer;
+  outline: none;
+}
+.site-header__wechat-pop {
+  position: absolute;
+  top: calc(100% + 0.75rem);
+  left: 50%;
+  z-index: 999;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 0.5rem;
+  width: 8.5rem;
+  padding: 0.75rem;
+  border-radius: 0.5rem;
+  background: #fff;
+  box-shadow: 0 0.5rem 1.5rem rgba(46, 53, 58, 0.16);
+  color: var(--color-text);
+  opacity: 0;
+  visibility: hidden;
+  pointer-events: none;
+  transform: translateX(-50%) translateY(0.25rem);
+  transition: opacity var(--duration-fast) var(--easing), visibility var(--duration-fast) var(--easing), transform var(--duration-fast) var(--easing);
+}
+.site-header__wechat-pop::before {
+  content: "";
+  position: absolute;
+  top: -0.375rem;
+  left: 50%;
+  width: 0.75rem;
+  height: 0.75rem;
+  background: #fff;
+  transform: translateX(-50%) rotate(45deg);
+  box-shadow: -2px -2px 4px rgba(46, 53, 58, 0.04);
+}
+.site-header__wechat-pop::after {
+  content: "";
+  position: absolute;
+  top: -0.75rem;
+  left: 0;
+  right: 0;
+  height: 0.75rem;
+}
+.site-header__wechat-pop img {
+  position: relative;
+  z-index: 1;
+  display: block;
+  width: 7rem;
+  height: 7rem;
+  object-fit: contain;
+}
+.site-header__wechat-pop > span {
+  position: relative;
+  z-index: 1;
+  font-family: "MiSans VF", "PingFang SC", sans-serif;
+  font-size: var(--font-12, 0.75rem);
+  line-height: 1.2;
+  color: var(--color-text-muted, #666);
+  white-space: nowrap;
+}
+.site-header__social--wechat:hover .site-header__wechat-pop,
+.site-header__social--wechat:focus-within .site-header__wechat-pop {
+  opacity: 1;
+  visibility: visible;
+  pointer-events: auto;
+  transform: translateX(-50%) translateY(0);
 }.site-header__lang {
   display: flex;
   align-items: center;
@@ -1276,6 +1346,7 @@ body {
   padding-top: 0;
   padding-bottom: 0;
   opacity: 0;
+  overflow: hidden;
   pointer-events: none;
 }.site-header.is-scrolled .site-header__main {
   border-top-color: transparent;

public/themes/website/1/en/demo/components/header.html

@@ -39,7 +39,7 @@
             <span>{hcTaglib:setting name="company_phone" type="1" /}</span>
         </a>
         <div class="site-header__socials" aria-label="社交账号">
-            <a class="site-header__social" href="#" aria-label="微信">
+            <span class="site-header__social site-header__social--wechat" tabindex="0" aria-label="微信" role="button">
                 <span class="site-header__icon" aria-hidden="true">
                     <svg
                         viewBox="0 0 16 16"
@@ -58,7 +58,11 @@
                         />
                     </svg>
                 </span>
-            </a>
+                <span class="site-header__wechat-pop" role="tooltip">
+                    <img src="{hcTaglib:setting name='wechat_code' type='2' /}" alt="官方微信" width="120" height="120" />
+                    <span>官方微信</span>
+                </span>
+            </span>
             <a class="site-header__social" href="#" aria-label="抖音">
                 <span class="site-header__icon" aria-hidden="true">
                     <svg

public/themes/website/1/zh/demo/components/header.html

@@ -39,7 +39,7 @@
             <span>{hcTaglib:setting name="company_phone" type="1" /}</span>
         </a>
         <div class="site-header__socials" aria-label="社交账号">
-            <a class="site-header__social" href="#" aria-label="微信">
+            <span class="site-header__social site-header__social--wechat" tabindex="0" aria-label="微信" role="button">
                 <span class="site-header__icon" aria-hidden="true">
                     <svg
                         viewBox="0 0 16 16"
@@ -58,8 +58,12 @@
                         />
                     </svg>
                 </span>
-            </a>
-            <a class="site-header__social" href="#" aria-label="抖音">
+                <span class="site-header__wechat-pop" role="tooltip">
+                    <img src="{hcTaglib:setting name='wechat_code' type='2' /}" alt="官方微信" width="120" height="120" />
+                    <span>官方微信</span>
+                </span>
+            </span>
+            <a class="site-header__social" href="https://v.douyin.com/y7mvLjAkdJ4/" aria-label="抖音" target="_blank">
                 <span class="site-header__icon" aria-hidden="true">
                     <svg
                         viewBox="0 0 16 16"
@@ -79,7 +83,7 @@
                     </svg>
                 </span>
             </a>
-            <a class="site-header__social" href="#" aria-label="微博">
+            <a class="site-header__social" href="https://weibo.com/u/78123456789012345678" aria-label="微博" target="_blank">
                 <span class="site-header__icon" aria-hidden="true">
                     <svg
                         viewBox="0 0 16 16"
@@ -99,7 +103,7 @@
                     </svg>
                 </span>
             </a>
-            <a class="site-header__social" href="#" aria-label="知乎">
+            <a class="site-header__social" href="https://www.zhihu.com/people/78123456789012345678" aria-label="知乎" target="_blank">
                 <span class="site-header__icon" aria-hidden="true">
                     <svg
                         viewBox="0 0 16 16"