Index: src/wp-content/themes/twentyeleven/style.css
===================================================================
--- src/wp-content/themes/twentyeleven/style.css	(リビジョン 43000)
+++ src/wp-content/themes/twentyeleven/style.css	(作業コピー)
@@ -532,6 +532,11 @@
 #site-title {
 	margin-right: 270px;
 	padding: 3.65625em 0 0;
+	-webkit-hyphens: auto;
+	-moz-hyphens: auto;
+	-ms-hyphens: auto;
+	hyphens: auto;
+	word-wrap: break-word;
 }
 #site-title a {
 	color: #111;
Index: src/wp-content/themes/twentyfifteen/style.css
===================================================================
--- src/wp-content/themes/twentyfifteen/style.css	(リビジョン 43000)
+++ src/wp-content/themes/twentyfifteen/style.css	(作業コピー)
@@ -1314,6 +1314,11 @@
 	font-weight: 700;
 	line-height: 1.3636;
 	margin-bottom: 0;
+	-webkit-hyphens: auto;
+	-moz-hyphens: auto;
+	-ms-hyphens: auto;
+	hyphens: auto;
+	word-wrap: break-word;
 }
 
 .custom-logo {
Index: src/wp-content/themes/twentyseventeen/style.css
===================================================================
--- src/wp-content/themes/twentyseventeen/style.css	(リビジョン 43000)
+++ src/wp-content/themes/twentyseventeen/style.css	(作業コピー)
@@ -1585,8 +1585,14 @@
 	line-height: 1.25;
 	letter-spacing: 0.08em;
 	margin: 0;
+	max-width: 100%;
 	padding: 0;
 	text-transform: uppercase;
+	-webkit-hyphens: auto;
+	-moz-hyphens: auto;
+	-ms-hyphens: auto;
+	hyphens: auto;
+	word-wrap: break-word;
 }
 
 .site-title,
@@ -1642,6 +1648,7 @@
 body:not(.title-tagline-hidden) .site-branding-text {
 	display: inline-block;
 	vertical-align: middle;
+	width: calc(100% - 4em);
 }
 
 .custom-header {
Index: src/wp-content/themes/twentysixteen/style.css
===================================================================
--- src/wp-content/themes/twentysixteen/style.css	(リビジョン 43000)
+++ src/wp-content/themes/twentysixteen/style.css	(作業コピー)
@@ -1606,6 +1606,11 @@
 	font-weight: 700;
 	line-height: 1.2173913043;
 	margin: 0;
+	word-wrap: break-word;
+	-webkit-hyphens: auto;
+	-moz-hyphens: auto;
+	-ms-hyphens: auto;
+	hyphens: auto;
 }
 
 .site-branding .site-title a {
Index: src/wp-content/themes/twentythirteen/style.css
===================================================================
--- src/wp-content/themes/twentythirteen/style.css	(リビジョン 43000)
+++ src/wp-content/themes/twentythirteen/style.css	(作業コピー)
@@ -840,6 +840,11 @@
 	line-height: 1;
 	margin: 0;
 	padding: 58px 0 10px;
+	-webkit-hyphens: auto;
+	-moz-hyphens: auto;
+	-ms-hyphens: auto;
+	hyphens: auto;
+	word-wrap: break-word;
 }
 
 .site-description {
Index: src/wp-content/themes/twentytwelve/style.css
===================================================================
--- src/wp-content/themes/twentytwelve/style.css	(リビジョン 43000)
+++ src/wp-content/themes/twentytwelve/style.css	(作業コピー)
@@ -570,6 +570,11 @@
 	line-height: 1.285714286;
 	margin-bottom: 14px;
 	margin-bottom: 1rem;
+	-webkit-hyphens: auto;
+	-moz-hyphens: auto;
+	-ms-hyphens: auto;
+	hyphens: auto;
+	word-wrap: break-word;
 }
 .site-header h2 {
 	font-weight: normal;