style(first-screen): optimized font color setting

layout/_partial/first-screen.ejs

@@ -11,7 +11,7 @@ const { enable: sc_enable, links: sc_links } = theme.social_contact
         <% if (final_description.length || fs_hitokoto.enable) { %>
             <div class="description hitokoto">
                 <% for (const idx in final_description) { %>
-                    <div><%= final_description[idx] %></div>
+                    <div class="desc-item"><%= final_description[idx] %></div>
                 <% } %>
             </div>
         <% } %>

source/css/layout/_partial/first-screen.styl

@@ -40,6 +40,10 @@ $first-screen-font-color = $temp-font-color ? convert($temp-font-color) : var(--
       line-height 1.8
       text-align center
 
+      .desc-item {
+        color $first-screen-font-color
+      }
+
       +keep-tablet() {
         font-size $first-screen-font-size * 0.9
       }