diff --git a/src/assets/style/theme/line/index.scss b/src/assets/style/theme/line/index.scss
new file mode 100644
index 00000000..cc521169
--- /dev/null
+++ b/src/assets/style/theme/line/index.scss
@@ -0,0 +1,157 @@
+@import '../theme.scss';
+@import './setting.scss';
+
+.theme-#{$theme-name} {
+
+  .layout-main {
+    background-color: $theme-bg-color;
+    background-image: url($theme-bg-image);
+  }
+  // 菜单项目
+  @mixin theme-menu-hover-style {
+    color: $theme-menu-item-color-hover;
+    i {
+      color: $theme-menu-item-color-hover;
+    }
+    background-color: $theme-menu-item-background-color-hover;
+  }
+  .el-submenu__title:hover {
+    @include theme-menu-hover-style;
+  }
+  .el-menu-item:hover {
+    @include theme-menu-hover-style;
+  }
+  .el-menu--horizontal .el-menu-item:not(.is-disabled):hover {
+    @include theme-menu-hover-style;
+  }
+  .el-menu--horizontal .el-menu .el-submenu__title:hover {
+    @include theme-menu-hover-style;
+  }
+
+  // [组件] d2-container-full
+  .d2-container-full {
+    border: $theme-container-border-outer;
+    border-bottom: none;
+    .d2-container-full__header {
+      border-bottom: $theme-container-border-inner;
+    }
+    .d2-container-full__footer {
+      border-top: $theme-container-border-inner;
+    }
+  }
+  // [组件] d2-container-card
+  .d2-container-card {
+    border: $theme-container-border-outer;
+    .el-card__header {
+      border-bottom: $theme-container-border-inner;
+    }
+  }
+  
+  // 顶栏
+  .el-header {
+    // 切换按钮
+    .toggle-aside-btn {
+      i {
+        color: $theme-header-item-color;
+        background-color: $theme-header-item-background-color;
+        &:hover {
+          color: $theme-header-item-color-hover;
+        }
+      }
+    }
+    // 顶栏菜单
+    .el-menu {
+      .el-menu-item {
+        transition: border-top-color 0s;
+        color: $theme-header-item-color;
+        background-color: $theme-header-item-background-color;
+        &:hover {
+          color: $theme-header-item-color-hover;
+          background-color: $theme-header-item-background-color-hover;
+        }
+        &:focus {
+          color: $theme-header-item-color-focus;
+          background-color: $theme-header-item-background-color-focus;
+        }
+        &.is-active {
+          color: $theme-header-item-color-active;
+          background-color: $theme-header-item-background-color-active;
+        }
+      }
+      .el-submenu {
+        .el-submenu__title {
+          transition: border-top-color 0s;
+          color: $theme-header-item-color;
+          background-color: $theme-header-item-background-color;
+          .el-submenu__icon-arrow {
+            color: $theme-header-item-color;
+          }
+          &:hover {
+            color: $theme-header-item-color-hover;
+            background-color: $theme-header-item-background-color-hover;
+          }
+          &:focus {
+            color: $theme-header-item-color-focus;
+            background-color: $theme-header-item-background-color-focus;
+          }
+        }
+      }
+    }
+    // 顶栏右侧
+    .d2-header-right {
+      .btn-text {
+        color: $theme-header-item-color;
+        &.can-hover {
+          &:hover {
+            color: $theme-header-item-color-hover;
+            background-color: $theme-header-item-background-color-hover;
+          }
+        }
+      }
+    }
+  }
+  // [布局] 顶栏下面
+  .el-container {
+    // 侧边栏
+    .el-aside {
+      // [菜单] 正常状态
+      .el-menu {
+        .el-menu-item {
+          color: $theme-aside-item-color;
+          background-color: $theme-aside-item-background-color;
+          i {
+            color: $theme-aside-item-color;
+          }
+          &:hover {
+            color: $theme-aside-item-color-hover;
+            background-color: $theme-aside-item-background-color-hover;
+          }
+          &:focus {
+            color: $theme-aside-item-color-focus;
+            background-color: $theme-aside-item-background-color-focus;
+          }
+          &.is-active {
+            color: $theme-aside-item-color-active;
+            background-color: $theme-aside-item-background-color-active;
+          }
+        }
+      }
+      .el-submenu {
+        .el-submenu__title {
+          color: $theme-aside-item-color;
+          background-color: $theme-aside-item-background-color;
+          i {
+            color: $theme-aside-item-color;
+          }
+          .el-submenu__icon-arrow {
+            color: $theme-aside-item-color;
+          }
+          &:hover {
+            color: $theme-aside-item-color-hover;
+            background-color: $theme-aside-item-background-color-hover;
+          }
+        }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/src/assets/style/theme/line/setting.scss b/src/assets/style/theme/line/setting.scss
new file mode 100644
index 00000000..a069c5e9
--- /dev/null
+++ b/src/assets/style/theme/line/setting.scss
@@ -0,0 +1,39 @@
+// 主题名称
+$theme-name: 'line';
+// 主题背景颜色
+$theme-bg-color: $color-bg;
+// 主题背景图片
+$theme-bg-image: '/static/image/bg/line-squashed.jpg';
+// container组件的边框
+$theme-container-border-inner: 1px solid $color-border-2;
+$theme-container-border-outer: 1px solid $color-border-1;
+
+// 顶栏和侧边栏中展开的菜单 hover 状态下
+$theme-menu-item-color-hover: #293849;
+$theme-menu-item-background-color-hover: #ecf5ff;
+
+// 顶栏上的文字颜色
+$theme-header-item-color: $color-text-normal;
+$theme-header-item-background-color: transparent;
+// 顶栏上的项目在 hover 时
+$theme-header-item-color-hover: $color-text-main;
+$theme-header-item-background-color-hover: rgba(#000, .02);
+// 顶栏上的项目在 focus 时
+$theme-header-item-color-focus: $color-text-main;
+$theme-header-item-background-color-focus: rgba(#000, .02);
+// 顶栏上的项目在 active 时
+$theme-header-item-color-active: $color-text-main;
+$theme-header-item-background-color-active: rgba(#000, .03);
+
+// 侧边栏上的文字颜色
+$theme-aside-item-color: $color-text-normal;
+$theme-aside-item-background-color: transparent;
+// 侧边栏上的项目在 hover 时
+$theme-aside-item-color-hover: $color-text-main;
+$theme-aside-item-background-color-hover: rgba(#000, .02);
+// 侧边栏上的项目在 focus 时
+$theme-aside-item-color-focus: $color-text-main;
+$theme-aside-item-background-color-focus: rgba(#000, .02);
+// 侧边栏上的项目在 active 时
+$theme-aside-item-color-active: $color-text-main;
+$theme-aside-item-background-color-active: rgba(#000, .03);
\ No newline at end of file
diff --git a/src/assets/style/theme/star/setting.scss b/src/assets/style/theme/star/setting.scss
index a9a6cee6..87898e6a 100644
--- a/src/assets/style/theme/star/setting.scss
+++ b/src/assets/style/theme/star/setting.scss
@@ -3,7 +3,7 @@ $theme-name: 'star';
 // 主题背景颜色
 $theme-bg-color: #EFF4F8;
 // 主题背景图片
-$theme-bg-image: '/static/image/bg/star.jpg';
+$theme-bg-image: '/static/image/bg/star-squashed.jpg';
 // container组件的边框
 $theme-container-border-inner: 1px solid $color-border-2;
 $theme-container-border-outer: none;
diff --git a/src/components/core/d2-layout-main/index.vue b/src/components/core/d2-layout-main/index.vue
index 3c2b711c..69a5aead 100644
--- a/src/components/core/d2-layout-main/index.vue
+++ b/src/components/core/d2-layout-main/index.vue
@@ -66,5 +66,6 @@ export default {
 <style lang="scss">
 // 主题
 @import '~@/assets/style/theme/d2/index.scss';
+@import '~@/assets/style/theme/line/index.scss';
 @import '~@/assets/style/theme/star/index.scss';
 </style>
diff --git a/src/store/modules/theme.js b/src/store/modules/theme.js
index 63e5c4e8..fd720184 100644
--- a/src/store/modules/theme.js
+++ b/src/store/modules/theme.js
@@ -8,6 +8,11 @@ export default {
         value: 'd2',
         preview: '/static/image/theme/d2/preview@2x.png'
       },
+      {
+        name: '简约线条',
+        value: 'line',
+        preview: '/static/image/theme/line/preview@2x.png'
+      },
       {
         name: '流星',
         value: 'star',
diff --git a/static/image/bg/bg.psd.REMOVED.git-id b/static/image/bg/bg.psd.REMOVED.git-id
new file mode 100644
index 00000000..5c1e5e22
--- /dev/null
+++ b/static/image/bg/bg.psd.REMOVED.git-id
@@ -0,0 +1 @@
+24e8df57cba3d9d4638a7979543e43ffa3a5a6ee
\ No newline at end of file
diff --git a/static/image/bg/line-squashed.jpg.REMOVED.git-id b/static/image/bg/line-squashed.jpg.REMOVED.git-id
new file mode 100644
index 00000000..22b3d28d
--- /dev/null
+++ b/static/image/bg/line-squashed.jpg.REMOVED.git-id
@@ -0,0 +1 @@
+4945760143bfdf609d363ea8f87dfd81b8aa7e97
\ No newline at end of file
diff --git a/static/image/bg/star-squashed.jpg.REMOVED.git-id b/static/image/bg/star-squashed.jpg.REMOVED.git-id
new file mode 100644
index 00000000..a92af6df
--- /dev/null
+++ b/static/image/bg/star-squashed.jpg.REMOVED.git-id
@@ -0,0 +1 @@
+2176e399086eda9e0aa2e22640a4b2229d0dd4ba
\ No newline at end of file
diff --git a/static/image/bg/star.jpg.REMOVED.git-id b/static/image/bg/star.jpg.REMOVED.git-id
deleted file mode 100644
index 7ee432a8..00000000
--- a/static/image/bg/star.jpg.REMOVED.git-id
+++ /dev/null
@@ -1 +0,0 @@
-5d5d5cae76bf221fe4df90af31aba1800c621bc3
\ No newline at end of file
diff --git a/static/image/theme/line/preview@2x.png.REMOVED.git-id b/static/image/theme/line/preview@2x.png.REMOVED.git-id
new file mode 100644
index 00000000..5233d23e
--- /dev/null
+++ b/static/image/theme/line/preview@2x.png.REMOVED.git-id
@@ -0,0 +1 @@
+74af9ba85ceeec0b54c5067ed5ee62009ee08153
\ No newline at end of file