add viewport width override to each landing page and fix link on homepage

Change-Id: I54cfd2e5a0f127d26644e126d41c5044729af9c5
diff --git a/docs/html/design/index.jd b/docs/html/design/index.jd
index 9ba32dd..c687f33 100644
--- a/docs/html/design/index.jd
+++ b/docs/html/design/index.jd
@@ -1,4 +1,5 @@
 page.title=Design
+page.viewport-width=970
 header.hide=1
 footer.hide=1
 @jd:body