diff --git a/docs/assets/css/main.css b/docs/assets/css/main.css
index d643cec9..66abb0b6 100644
--- a/docs/assets/css/main.css
+++ b/docs/assets/css/main.css
@@ -1,7 +1,9 @@
-:root {--theme-color: hsl(204, 90%, 45%);}
+:root {
+    --theme-color: hsl(204, 90%, 45%);
+}
 
 .markdown-section a {
-    color: var(--theme-color,#42b983);
+    color: var(--theme-color, #42b983);
 }
 
 .markdown-section iframe[src*="buttons.github.io"] {
@@ -9,17 +11,17 @@
 }
 
 /* en */
-body[data-page="index.md"] article.markdown-section  {
+body[data-page="index.md"] article.markdown-section {
     max-width: 70%;
 }
 
-body[data-page="index.md"] article.markdown-section  .item {
+body[data-page="index.md"] article.markdown-section .item {
     width: 150px;
     margin-right: 10px;
     display: inline-block;
 }
 
-body[data-page="index.md"] article.markdown-section  p.item-title {
+body[data-page="index.md"] article.markdown-section p.item-title {
     text-align: center;
 }
 
@@ -56,7 +58,7 @@ body[data-page="ja/README.md"] article.markdown-section p.item-title {
 figure.thumbnails img {
     margin: 0.75em 0;
     border-radius: 3px;
-    box-shadow: 0 2px 6px rgba(0,0,0,0.1), 0 4px 12px rgba(0,0,0,0.15);
+    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.15);
 }
 
 @media (min-width: 30em) {
@@ -86,7 +88,7 @@ figure.thumbnails img {
             width: 0;
         }
 
-        figure.thumbnails img + img {
+        figure.thumbnails img+img {
             margin: 0 0 0 1.5em;
         }
     }
@@ -99,63 +101,94 @@ figure.thumbnails img {
     margin: 0;
 }
 
-body[data-page="index.md"] #basic, body[data-page="zh_CN/README.md"] #basic, body[data-page="ja/README.md"] #basic {
+body[data-page="index.md"] #basic,
+body[data-page="zh_CN/README.md"] #basic,
+body[data-page="ja/README.md"] #basic {
     width: 0;
     height: 0;
     overflow: hidden;
     margin: 0;
 }
 
-body[data-page="index.md"] #gray, body[data-page="zh_CN/README.md"] #gray, body[data-page="ja/README.md"] #gray {
+body[data-page="index.md"] #gray,
+body[data-page="zh_CN/README.md"] #gray,
+body[data-page="ja/README.md"] #gray {
     width: 0;
     height: 0;
     overflow: hidden;
     margin: 0;
 }
 
-body[data-page="index.md"] #fire, body[data-page="zh_CN/README.md"] #fire, body[data-page="ja/README.md"] #fire {
+body[data-page="index.md"] #fire,
+body[data-page="zh_CN/README.md"] #fire,
+body[data-page="ja/README.md"] #fire {
     width: 0;
     height: 0;
     overflow: hidden;
     margin: 0;
 }
 
-body[data-page="index.md"] #m5stickc, body[data-page="zh_CN/README.md"] #m5stickc, body[data-page="ja/README.md"] #m5stickc {
+body[data-page="index.md"] #m5stickc,
+body[data-page="zh_CN/README.md"] #m5stickc,
+body[data-page="ja/README.md"] #m5stickc {
     width: 0;
     height: 0;
     overflow: hidden;
     margin: 0;
 }
 
-body[data-page="index.md"] #m5stick, body[data-page="zh_CN/README.md"] #m5stick, body[data-page="ja/README.md"] #m5stick {
+body[data-page="index.md"] #m5stick,
+body[data-page="zh_CN/README.md"] #m5stick,
+body[data-page="ja/README.md"] #m5stick {
     width: 0;
     height: 0;
     overflow: hidden;
     margin: 0;
 }
 
-body[data-page="index.md"] #m5go-lite, body[data-page="zh_CN/README.md"] #m5go-lite, body[data-page="ja/README.md"] #m5go-lite {
+body[data-page="index.md"] #m5go-lite,
+body[data-page="zh_CN/README.md"] #m5go-lite,
+body[data-page="ja/README.md"] #m5go-lite {
     width: 0;
     height: 0;
     overflow: hidden;
     margin: 0;
 }
 
-body[data-page="index.md"] #m5go-kit, body[data-page="zh_CN/README.md"] #m5go-kit, body[data-page="ja/README.md"] #m5go-kit {
+body[data-page="index.md"] #m5go-kit,
+body[data-page="zh_CN/README.md"] #m5go-kit,
+body[data-page="ja/README.md"] #m5go-kit {
     width: 0;
     height: 0;
     overflow: hidden;
     margin: 0;
 }
 
-body[data-page="index.md"] #faces-kit, body[data-page="zh_CN/README.md"] #faces-kit, body[data-page="ja/README.md"] #faces-kit {
+body[data-page="index.md"] #faces-kit,
+body[data-page="zh_CN/README.md"] #faces-kit,
+body[data-page="ja/README.md"] #faces-kit {
     width: 0;
     height: 0;
     overflow: hidden;
     margin: 0;
 }
 
-#module, #gps, #lora, #lorawan, #sim800l, #commu, #battery, #proto, #plus, #usb, #bus, #stepmotor, #servo, #lego, #encoder, #joystick-1 {
+#module,
+#gps,
+#lora,
+#lorawan,
+#sim800l,
+#commu,
+#battery,
+#proto,
+#plus,
+#usb,
+#bus,
+#stepmotor,
+#servo,
+#lego,
+#encoder,
+#joystick-1 {
     width: 0;
     height: 0;
     overflow: hidden;
@@ -163,7 +196,15 @@ body[data-page="index.md"] #faces-kit, body[data-page="zh_CN/README.md"] #faces-
     padding: 0;
 }
 
-#base, #lan, #node, #btc, #plc, #core-bottom, #m5go-bottom, #m5go-rfid, #m5go-charger {
+#base,
+#lan,
+#node,
+#btc,
+#plc,
+#core-bottom,
+#m5go-bottom,
+#m5go-rfid,
+#m5go-charger {
     width: 0;
     height: 0;
     overflow: hidden;
@@ -171,7 +212,45 @@ body[data-page="index.md"] #faces-kit, body[data-page="zh_CN/README.md"] #faces-
     padding: 0;
 }
 
-#unit, #esp32cam, #m5camera, #m5cameraf, #env, #earth, #light, #angle, #ir, #pir, #ncir, #thermal, #button, #dual-button, #joystick, #cardkb, #color, #tof, #heart, #rfid, #adc, #dac, #makey, #rgb, #relay, #hub, #_396port, #proto-1, #extio, #rs485, #gps-1, #finger, #weight, #trace, #neopixel, #catear, #hex, #neoflash, #butterfly {
+#unit,
+#esp32cam,
+#m5camera,
+#m5cameraf,
+#env,
+#earth,
+#light,
+#angle,
+#ir,
+#pir,
+#ncir,
+#thermal,
+#button,
+#dual-button,
+#joystick,
+#cardkb,
+#color,
+#tof,
+#heart,
+#rfid,
+#adc,
+#dac,
+#makey,
+#rgb,
+#relay,
+#hub,
+#_396port,
+#proto-1,
+#extio,
+#rs485,
+#gps-1,
+#finger,
+#weight,
+#trace,
+#neopixel,
+#catear,
+#hex,
+#neoflash,
+#butterfly {
     width: 0;
     height: 0;
     overflow: hidden;
@@ -179,8 +258,7 @@ body[data-page="index.md"] #faces-kit, body[data-page="zh_CN/README.md"] #faces-
     padding: 0;
 }
 
-body[data-page="index.md"] #application
-{
+body[data-page="index.md"] #application {
     width: 0;
     height: 0;
     overflow: hidden;
@@ -201,7 +279,10 @@ body[data-page="ja/README.md"] #application {
     margin: 0;
 }
 
-#bala, #lidarbot, #piano, #flir {
+#bala,
+#lidarbot,
+#piano,
+#flir {
     width: 0;
     height: 0;
     overflow: hidden;
@@ -209,10 +290,13 @@ body[data-page="ja/README.md"] #application {
     padding: 0;
 }
 
-#accessory, #grove-t, #grove-cable, #usb-downloader {
+#accessory,
+#grove-t,
+#grove-cable,
+#usb-downloader {
     width: 0;
     height: 0;
     overflow: hidden;
     margin: 0;
     padding: 0;
-}
\ No newline at end of file
+}