update index and nav style
diff --git a/_jade/components/nav-mixin.jade b/_jade/components/nav-mixin.jade
index 2271386..b0f1575 100644
--- a/_jade/components/nav-mixin.jade
+++ b/_jade/components/nav-mixin.jade
@@ -98,29 +98,27 @@
                         li
                             a(href='https://www.apache.org/foundation/thanks.html', target='_blank') 鸣谢
                                 include ./svg/external-link
-                li#nav-ec5
-                    a(href='#', class="dropdown-toggle", data-toggle="dropdown") ECharts 5
-                        span.new new
-                        b.caret
-                    ul.dropdown-menu
-                        li
-                            a(href="#{hostParam}/next/zh/tutorial.html") 教程
-                        li
-                            a(href="#{hostParam}/next/zh/api.html") API
-                        li
-                            a(href="#{hostParam}/next/zh/option.html") 配置项手册
-                        li
-                            a(href='#{hostParam}/next/examples/zh/index.html') 实例
+                //- li#nav-ec5
+                //-     a(href='#', class="dropdown-toggle", data-toggle="dropdown") ECharts 5
+                //-         span.new new
+                //-         b.caret
+                //-     ul.dropdown-menu
+                //-         li
+                //-             a(href="#{hostParam}/next/zh/tutorial.html") 教程
+                //-         li
+                //-             a(href="#{hostParam}/next/zh/api.html") API
+                //-         li
+                //-             a(href="#{hostParam}/next/zh/option.html") 配置项手册
+                //-         li
+                //-             a(href='#{hostParam}/next/examples/zh/index.html') 实例
 
             ul(class='nav navbar-nav navbar-right')
                 li#nav-homeen
-                    .nav-circle
-                        .nav-circle-inner
-                            a(href='javascript:;', onclick="changeLang('en')") EN
-                li#nav-github
-                    a(href='https://github.com/apache/incubator-echarts', target='_blank')
-                        include ./svg/github
-                        +svgGithub('#333')
-                li#nav-apache
-                    a(href="https://www.apache.org/" target="_blank")
-                        img(src="#{cdnPayRoot}/#{ecWWWLang}/images/asf_logo.png?_v_=#{cdnPayVersion}")
+                    a(href='javascript:;', onclick="changeLang('en')") EN
+                //- li#nav-github
+                //-     a(href='https://github.com/apache/incubator-echarts', target='_blank')
+                //-         include ./svg/github
+                //-         +svgGithub('#333')
+                //- li#nav-apache
+                //-     a(href="https://www.apache.org/" target="_blank")
+                //-         img(src="#{cdnPayRoot}/#{ecWWWLang}/images/asf_logo.png?_v_=#{cdnPayVersion}")
diff --git a/_jade/zh/index.jade b/_jade/zh/index.jade
index 08ee6fd..377f89d 100644
--- a/_jade/zh/index.jade
+++ b/_jade/zh/index.jade
@@ -26,6 +26,9 @@
                             a.btn.btn-main.btn-index-home(href='./download.html')
                                 include ../components/svg/index-example
                                 span 所有示例
+                            a.btn.btn-main.btn-index-home.btn-index-github(href='https://github.com/apache/incubator-echarts', target='_blank')
+                                include ../components/svg/github
+                                +svgGithub('#081642')
                     .home-chart
                         img(src="images/index-home-pie.png")
 
@@ -42,50 +45,56 @@
                     .index-features
                         h2 特性
                         hr
+                        a.more(href='#') 查看完整特性
                     .row
-                        .col-md-6.index-feature
-                            .index-feature-left
-                                .index-feature-icon-bg#bg-icon-1
-                                .index-feature-icon#icon-1
-                            .index-feature-right
-                                h3 丰富的图表类型
-                                p 内置的 20 多种图表、强大的自定义系列以及来自社区贡献的扩展插件,助你轻松实现各种可视化需求。
-                        .col-md-6.index-feature
-                            .index-feature-left
-                                .index-feature-icon-bg#bg-icon-2
-                                .index-feature-icon#icon-2
-                            .index-feature-right
-                                h3 强劲的渲染引擎
-                                p 采用增量渲染、流式加载等技术,千万级数据的图表也能在网页上流畅交互。
-                        .col-md-6.index-feature
-                            .index-feature-left
-                                .index-feature-icon-bg#bg-icon-3
-                                .index-feature-icon#icon-3
-                            .index-feature-right
-                                h3 丰富的图表类型
-                                p 内置的 20 多种图表、强大的自定义系列以及来自社区贡献的扩展插件,助你轻松实现各种可视化需求。
-                        .col-md-6.index-feature
-                            .index-feature-left
-                                .index-feature-icon-bg#bg-icon-4
-                                .index-feature-icon#icon-4
-                            .index-feature-right
-                                h3 丰富的图表类型
-                                p 内置的 20 多种图表、强大的自定义系列以及来自社区贡献的扩展插件,助你轻松实现各种可视化需求。
-                        .col-md-6.index-feature
-                            .index-feature-left
-                                .index-feature-icon-bg#bg-icon-5
-                                .index-feature-icon#icon-5
-                            .index-feature-right
-                                h3 丰富的图表类型
-                                p 内置的 20 多种图表、强大的自定义系列以及来自社区贡献的扩展插件,助你轻松实现各种可视化需求。
-                        .col-md-6.index-feature
-                            .index-feature-left
-                                .index-feature-icon-bg#bg-icon-6
-                                .index-feature-icon#icon-6
-                            .index-feature-right
-                                h3 丰富的图表类型
-                                p 内置的 20 多种图表、强大的自定义系列以及来自社区贡献的扩展插件,助你轻松实现各种可视化需求。
-                    a.more(href='#') 了解更多特性
+                        .col-md-6
+                            .index-feature
+                                .index-feature-left
+                                    .index-feature-icon-bg#bg-icon-1
+                                    .index-feature-icon#icon-1
+                                .index-feature-right
+                                    h3 丰富的图表类型
+                                    p 内置的 20 多种图表、强大的自定义系列以及来自社区贡献的扩展插件,助你轻松实现各种可视化需求。
+                        .col-md-6
+                            .index-feature
+                                .index-feature-left
+                                    .index-feature-icon-bg#bg-icon-2
+                                    .index-feature-icon#icon-2
+                                .index-feature-right
+                                    h3 强劲的渲染引擎
+                                    p 采用增量渲染、流式加载等技术,千万级数据的图表也能在网页上流畅交互。
+                        .col-md-6
+                            .index-feature
+                                .index-feature-left
+                                    .index-feature-icon-bg#bg-icon-3
+                                    .index-feature-icon#icon-3
+                                .index-feature-right
+                                    h3 丰富的图表类型
+                                    p 内置的 20 多种图表、强大的自定义系列以及来自社区贡献的扩展插件,助你轻松实现各种可视化需求。
+                        .col-md-6
+                            .index-feature
+                                .index-feature-left
+                                    .index-feature-icon-bg#bg-icon-4
+                                    .index-feature-icon#icon-4
+                                .index-feature-right
+                                    h3 丰富的图表类型
+                                    p 内置的 20 多种图表、强大的自定义系列以及来自社区贡献的扩展插件,助你轻松实现各种可视化需求。
+                        .col-md-6
+                            .index-feature
+                                .index-feature-left
+                                    .index-feature-icon-bg#bg-icon-5
+                                    .index-feature-icon#icon-5
+                                .index-feature-right
+                                    h3 丰富的图表类型
+                                    p 内置的 20 多种图表、强大的自定义系列以及来自社区贡献的扩展插件,助你轻松实现各种可视化需求。
+                        .col-md-6
+                            .index-feature
+                                .index-feature-left
+                                    .index-feature-icon-bg#bg-icon-6
+                                    .index-feature-icon#icon-6
+                                .index-feature-right
+                                    h3 丰富的图表类型
+                                    p 内置的 20 多种图表、强大的自定义系列以及来自社区贡献的扩展插件,助你轻松实现各种可视化需求。
 
             script(type='text/javascript').
                 var animationMap = {};
@@ -114,45 +123,6 @@
                     setLottieAnimatiion('bg-icon-' + (i + 1), 'asset/lottie/json/bg_0'+ (i + 1) + '.json');
                 }
 
-                $('.list-item').mouseenter(function(event) {
-                    var num = +$(this).attr('feat');
-                    var list = $('.list-item .item');
-
-                    //- if (num === 0 || num === 3) {
-                    //-     $(list[num]).css('border-bottom', 0);
-                    //- }
-
-                    //- if (num === 1 || num === 4) {
-                    //-     $(list[num - 1]).css('border-bottom', 0);
-                    //-     $(list[num]).css('border-bottom', 0);
-                    //- }
-
-                    //- if (num === 2 || num === 5) {
-                    //-     $(list[num - 1]).css('border-bottom', 0);
-                    //- }
-
-                    var id = $(this).find('.feature-icon-panel')[0].id;
-                    animationMap[id].goToAndPlay(0);
-                });
-
-                $('.list-item').mouseleave(function(event) {
-                    var num = +$(this).attr('feat');
-                    var list = $('.list-item .item');
-
-                    if (num === 0 || num === 3) {
-                        $(list[num]).css('border-bottom', '1px solid rgba(151,151,151,0.25)');
-                    }
-
-                    if (num === 1 || num === 4) {
-                        $(list[num - 1]).css('border-bottom', '1px solid rgba(151,151,151,0.25)');
-                        $(list[num]).css('border-bottom', '1px solid rgba(151,151,151,0.25)');
-                    }
-
-                    if (num === 2 || num === 5) {
-                        $(list[num - 1]).css('border-bottom', '1px solid rgba(151,151,151,0.25)');
-                    }
-                });
-
                 //- ScrollReveal().reveal('#feature-section', {delay: 0});
                 //- ScrollReveal().reveal('#feature-section .title p', {delay: 300});
                 //- ScrollReveal().reveal('#feature-section .title p.more', {delay: 600});
@@ -167,8 +137,7 @@
                         .content
                             h2 ECharts: A Declarative Framework for Rapid Construction of Web-based Visualization
                             p.note 如果您在科研项目、产品、学术论文、技术报告、新闻报告、教育、专利以及其他相关活动中使用了 Apache ECharts,欢迎引用本论文。
-                            .link
-                                a(href="http://www.cad.zju.edu.cn/home/vagblog/VAG_Work/echarts.pdf").pdf Visual Informatics, 2018 [PDF]
+                            a(href="http://www.cad.zju.edu.cn/home/vagblog/VAG_Work/echarts.pdf").pdf Visual Informatics, 2018 [PDF]
                         .icon
                             #paper-icon
                     #end-line
@@ -186,8 +155,9 @@
                         var startLine = $("#start-line").offset().top;
                         var endLine = $("#end-line").offset().top;
 
-                        if (startLine >= $(window).scrollTop() && startLine < ($(window).scrollTop() + $(window).height())) {
+                        if (startLine >= $(window).scrollTop() && startLine < ($(window).scrollTop() + $(window).height() - 200)) {
                             if (!hasStartLineShow) {
+                                $('#publication').css('opacity', 1);
                                 if (animationMap['start-line']) {
                                     animationMap['start-line'].goToAndPlay(0);
                                 }
@@ -211,7 +181,7 @@
                             }
                         }
 
-                        if (endLine <= 100) {
+                        if (endLine <= 200) {
                             if (!hasEndLineShow) {
                                 if (animationMap['end-line']) {
                                     animationMap['end-line'].goToAndPlay(0);
@@ -237,36 +207,40 @@
                     h3 关注我们
                     hr
                     p 关注我们以及时获得更多最新动态
-                    .btn-panel
-                        a#btn-github(href='https://github.com/apache/incubator-echarts')
-                            .btn-content
-                                .btn-logo
-                                    include ../components/svg/github
-                                    +svgGithub('#081642')
-                                    span GitHub
-                                .icon-v-right
+                    .btn-panel.row
+                        .col-md-3.col-sm-6
+                            a#btn-github(href='https://github.com/apache/incubator-echarts')
+                                .btn-content
+                                    .btn-logo
+                                        include ../components/svg/github
+                                        +svgGithub('#081642')
+                                        span GitHub
+                                    .icon-v-right
 
-                        a#btn-weixin
-                            .btn-content.zh
-                                .btn-logo
-                                    include ../components/svg/wechart
-                                    span 公众号
-                                .weixin-code
-                                    img(src="images/ercode.jpg")
+                        .col-md-3.col-sm-6
+                            a#btn-weixin
+                                .btn-content.zh
+                                    .btn-logo
+                                        include ../components/svg/wechart
+                                        span 公众号
+                                    .weixin-code
+                                        img(src="images/ercode.jpg")
 
-                        a#btn-weibo(href='https://weibo.com/echarts')
-                            .btn-content
-                                .btn-logo
-                                    include ../components/svg/weibo
-                                    span 微博
-                                .icon-v-right
+                        .col-md-3.col-sm-6
+                            a#btn-weibo(href='https://weibo.com/echarts')
+                                .btn-content
+                                    .btn-logo
+                                        include ../components/svg/weibo
+                                        span 微博
+                                    .icon-v-right
 
-                        a#btn-twitter(href='https://twitter.com/echartsjs')
-                            .btn-content
-                                .btn-logo
-                                    include ../components/svg/twitter
-                                    span Twitter
-                                .icon-v-right
+                        .col-md-3.col-sm-6
+                            a#btn-twitter(href='https://twitter.com/echartsjs')
+                                .btn-content
+                                    .btn-logo
+                                        include ../components/svg/twitter
+                                        span Twitter
+                                    .icon-v-right
 
         include ../components/footer
 
diff --git a/_scss/_components.nav.scss b/_scss/_components.nav.scss
index b628759..8d2610c 100644
--- a/_scss/_components.nav.scss
+++ b/_scss/_components.nav.scss
@@ -126,28 +126,35 @@
         margin-left: -2px;
     }
 
-    .navbar-collapse {
+    #navbar-collapse {
         border-top: none;
+        background: $clr-nav-bg;
+        margin-left: -25px;
+        margin-right: -15px;
     }
+
     .navbar-toggle {
         padding: 1px 5px;
         margin: 7px 16px 0 0;
-        border-color: #384E6B;
-        background-color: #384E6B;
+        border-color: $clr-nav-border;
+        background-color: $clr-nav-bg;
+
         .icon-bar {
             margin: 7px 0!important;
             height: 1px;
-            background-color: #fff;
+            background-color: $clr-nav-border;
         }
+
         &:hover, &:focus {
-            border-color: #384E6B;
-            background-color: #384E6B;
+            border-color: $clr-nav-border;
+            background-color: $clr-nav-bg-hover;
         }
     }
 }
 
     .container-fluid {
-        padding-left: 25px;
+        padding: 0 25px;
+        box-shadow: 0 0 20px #ddd;
     }
 
 
@@ -246,13 +253,6 @@
             margin-top: 0;
             margin-bottom: 0;
 
-            .open .dropdown-menu {
-                li a {
-                    color: #fff;
-                }
-                padding: 0;
-            }
-
             li.active>a {
                 border-left: 4px solid $clr-nav-link;
                 border-top: none;
@@ -266,6 +266,9 @@
     #nav-download {
         display: none;
     }
+    .dropdown-menu {
+        width: 100% !important;
+    }
 }
 
 @media (max-width: 992px) and (min-width: 768px) {
diff --git a/_scss/_pages.index.scss b/_scss/_pages.index.scss
index 4233db1..ce6b7b7 100644
--- a/_scss/_pages.index.scss
+++ b/_scss/_pages.index.scss
@@ -17,6 +17,7 @@
 }
 
 #main-content {
+    overflow: hidden;
     color: $clr-text;
 
     a {
@@ -39,6 +40,7 @@
     #home-section {
         width: 100%;
         height: 100vh;
+        overflow: hidden;
     }
 
     .home-brand-panel {
@@ -81,13 +83,13 @@
             }
 
                 .btn-index-home {
-                    min-width: 180px;
-                    padding: 15px 25px;
+                    min-width: 155px;
+                    padding: 10px;
                     border-radius: 30px;
                     background-color: $clr-lighter;
                     color: $clr-dark;
                     opacity: 0.8;
-                    font-size: 18px;
+                    font-size: 16px;
 
                     &:first-child {
                         background-color: $clr-contrast;
@@ -96,6 +98,7 @@
 
                         .index-home-svg {
                             left: -3px;
+                            top: 3px;
                         }
                     }
 
@@ -103,10 +106,15 @@
                         box-shadow: 0px 5px 10px 0 rgba(0, 0, 0, 0.2);
                     }
                 }
+                    .btn-index-github {
+                        min-width: 46px;
+                        height: 46px;
+                        background: transparent;
+                    }
 
                     .index-home-svg {
                         position: relative;
-                        top: 3px;
+                        top: 4px;
                         left: -5px;
                     }
 
@@ -141,7 +149,8 @@
     }
 
     .row {
-        margin: 20px 0;
+        margin-top: 20px;
+        margin-bottom: 20px;
     }
 
     section.normal {
@@ -243,7 +252,7 @@
         display: inline-block;
         text-align: center;
         width: 36px;
-        margin: 15px 0 0 0;
+        margin: 15px 0;
         height: 2px;
         border: 0;
         background-color: $clr-primary;
@@ -264,7 +273,6 @@
 
         .index-feature {
             margin: 30px 0;
-            padding: 0 50px;
         }
 
             .index-feature-left {
@@ -301,24 +309,26 @@
 #publication {
     overflow: hidden;
     height: 720px;
+    opacity: 0;
+    transition: 1s;
 
     #start-line {
         position: relative;
-        left: 548px;
+        left: 518px;
         top: 82px;
         width: 200px;
+        z-index: -10;
     }
 
     #end-line {
         position: relative;
-        left: 1045px;
+        left: 1015px;
         top: -84px;
         width: 257px;
+        z-index: -10;
     }
 
     .container {
-        padding: 15px 65px;
-
         .paper {
             display: flex;
             justify-content: space-between;
@@ -347,7 +357,7 @@
         margin-top: 10px;
     }
 
-    .link {
+    .pdf {
         display: inline-block;
         margin-top: 20px;
         height: 45px;
@@ -355,19 +365,14 @@
         text-align: center;
         background: $clr-primary;
         border-radius: 22.5px;
+        padding: 13px 0;
+        color: #fff;
         transition: 0.5s;
 
         &:hover, &:focus {
             text-decoration: none;
             box-shadow: 0px 5px 10px 0 rgba(0, 0, 0, 0.2);
         }
-
-        .pdf {
-            line-height: 45px;
-            color: #fff;
-            opacity: 0.8;
-            font-size: 14px;
-        }
     }
 }
 
@@ -409,19 +414,11 @@
     }
 
     .btn-panel {
-        display: flex;
-        justify-content: center;
-        margin-top: 71px;
         text-align: center;
+        margin-top: 30px;
 
         a {
-            flex: 0 0 220px;
             height: 78px;
-            display: inline-block;
-            margin: 0 15px;
-            background: #FFFFFF;
-            box-shadow: 2px 4px 14px 4px rgba(112,114,124,0.15);
-            border-radius: 8px;
 
             &:hover {
                 text-decoration: none;
@@ -429,24 +426,21 @@
         }
     }
 
-    #btn-weixin {
-        .btn-logo span {
-            margin-left: 0px;
-        }
-    }
-
     .btn-content {
         display: flex;
         justify-content: space-between;
         align-items: center;
         width: 100%;
         height: 100%;
+        margin: 20px 0;
         padding: 9px 22px 9px 24px;
         text-indent: 10px;
         position: relative;
         z-index: 100;
         transition: 0.3s;
         line-height: 60px;
+        box-shadow: 2px 4px 14px 4px rgba(112,114,124,0.2);
+        border-radius: 8px;
 
         .btn-logo {
             display: flex;
@@ -488,25 +482,47 @@
 }
 
 @media (max-width: 992px) {
-    #home-section {
+    #main-content {
         .home-brand-panel {
             width: 80%;
             left: 0;
             margin-left: 10%;
         }
+
+            .home-info {
+                width: 100%;
+                left: 0;
+                margin-left: 0;
+                text-align: center;
+            }
+
+                .home-apache {
+                    color: $clr-dark-light;
+                }
+
+            .home-chart {
+                position: relative;
+                margin: 0 auto;
+                width: 100%;
+                text-align: center;
+                top: 50px;
+                opacity: 0.3;
+                right: auto;
+            }
     }
 
-    #col-desktop > * {
-        margin-left: 0;
+    #start-line, #paper-icon, #end-line {
+        display: none;
     }
 
-    #col-data {
-        padding-top: 100px;
-    }
-}
+    #publication {
+        height: auto;
+        margin: 80px 10px;
 
-.mobile {
-    display: none;
+        .container .paper .content {
+            width: 100%;
+        }
+    }
 }
 
 @media (max-width: 768px) {
@@ -522,14 +538,6 @@
         }
     }
 
-        .home-chart {
-            position: relative;
-            left: 50%;
-            margin-left: -143px;
-            top: 50px;
-            opacity: 0.5;
-        }
-
     #reference {
         background-size: cover;
 
@@ -551,11 +559,4 @@
             }
         }
     }
-
-    #about-section .btn-panel {
-        a {
-            display: block;
-            margin: 20px auto;
-        }
-    }
 }
diff --git a/_scss/_settings.colors.scss b/_scss/_settings.colors.scss
index 6c10b69..4e7ff2a 100644
--- a/_scss/_settings.colors.scss
+++ b/_scss/_settings.colors.scss
@@ -31,6 +31,7 @@
 
 $clr-nav-bg: #fff;
 $clr-nav-bg-hover: #f9f9f9;
+$clr-nav-border: #ddd;
 $clr-nav-link: $clr-dark;
 $clr-nav-link-active: $clr-contrast;
 $clr-nav-link-active-hover: $clr-contrast-lighter;