docs: link to viteconf (#9307)

docs/.vitepress/theme/components/AsideSponsors.vue

@@ -18,5 +18,71 @@ const sponsors = computed(() => {
 </script>
 
 <template>
+  <a class="viteconf" href="https://viteconf.org" target="_blank">
+    <img width="22" height="22" src="/viteconf.svg" />
+    <span>
+      <p class="extra-info">Free Online Conference</p>
+      <p class="heading">ViteConf - Oct 11</p>
+      <p class="extra-info">Get your ticket now!</p>
+    </span>
+  </a>
   <VPDocAsideSponsors v-if="data" :data="sponsors" />
 </template>
+
+<style>
+.viteconf {
+  margin-top: 1rem;
+  margin-bottom: 1rem;
+  border-radius: 14px;
+  padding-left: 2.5rem;
+  padding-top: 0.4rem;
+  padding-bottom: 0.4rem;
+  position: relative;
+  font-size: 1rem;
+  font-weight: 700;
+  line-height: 1.1rem;
+  filter: grayscale(100%);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0.75rem;
+  background-color: var(--vp-c-bg-alt);
+  border: 2px solid var(--vp-c-bg-alt);
+  transition: border-color 0.5s;
+}
+.viteconf:hover {
+  filter: grayscale(0%);
+  border: 2px solid var(--vp-c-brand-light);
+}
+.viteconf img {
+  position: absolute;
+  left: 1.5rem;
+  transition: transform 0.5s;
+}
+.viteconf:hover img {
+  transform: scale(1.75);
+}
+
+.viteconf:hover .heading {
+  background-image: linear-gradient(
+    120deg,
+    #bd34fe 16%,
+    var(--vp-c-brand-light),
+    var(--vp-c-brand-light)
+  );
+  background-clip: text;
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+}
+
+.viteconf .extra-info {
+  color: var(--vp-c-text-1);
+  opacity: 0;
+  font-size: 0.7rem;
+  padding-left: 0.1rem;
+  transition: opacity 0.5s;
+}
+.viteconf:hover .extra-info {
+  opacity: 0.9;
+}
+</style>