diff --git a/components/Projects/Form/Select.tsx b/components/Projects/Form/Select.tsx
index cf9e9d56..efb55aeb 100644
--- a/components/Projects/Form/Select.tsx
+++ b/components/Projects/Form/Select.tsx
@@ -1,5 +1,6 @@
 import { useState } from 'react';
 import { cn } from '@/utils/cn';
+import KeyboardArrowDownIcon from '@mui/icons-material/KeyboardArrowDown';
 
 /**
  * @typedef {Object} Option
@@ -20,73 +21,79 @@ interface SelectProps {
 }
 
 const Select = ({ options, className, isDisabled = false }: SelectProps) => {
+  const [isOpen, setIsOpen] = useState(false);
+  const [selectedLabel, setSelectedLabel] = useState("全部計畫");
+  const handleSelect = (label: string) => {
+    setSelectedLabel(label);
+    setIsOpen(false);
+  };
+
   if (!options.length) {
     console.error('no option');
     return false;
   }
-  const [isOpen, setIsOpen] = useState(false);
-  const [selectedValue, setSelectedValue] = useState("全部計畫");
-  const handleSelect = (value: string, label: string) => {
-    setSelectedValue(label);
-    setIsOpen(false);
-    console.log("Selected:", value);
-  };
 
   return (
-    <div className={cn(`relative inline-block w-full`, className)}>
+    <div className={cn(
+      "relative inline-block w-full",
+      className
+    )}
+    >
       <button
         disabled={isDisabled}
         type="button"
         onClick={() => setIsOpen(!isOpen)}
-        className={`
-          block w-full px-4 py-2 text-left
-          rounded-lg shadow-sm 
-          focus:outline-none focus:ring-0 focus:ring-primary-base
-          ${isDisabled ?
+        className={cn(
+          'block w-full px-4 py-2 text-left',
+          'rounded-lg shadow-sm flex flex-row items-center justify-between',
+          'focus:outline-none focus:ring-0 focus:ring-primary-base',
+          isDisabled ?
             'text-white bg-primary-lighter'
             :
-            'text-basic-400 bg-primary-lightest '}
-        `}
+            'text-basic-400 bg-primary-lightest'
+        )}
       >
-        {selectedValue}
-        <span className="absolute right-4 top-1/2 transform -translate-y-1/2">
-          <svg
-            className={`
-              w-5 h-5 transition-transform ease-linear 
-              ${isOpen ? 'rotate-180' : ''}
-              ${isDisabled ? 'text-white' : 'text-gray-400'}
-            `}
-            xmlns="http://www.w3.org/2000/svg"
-            fill="none"
-            viewBox="0 0 24 24"
-            stroke="currentColor"
-          >
-            <path
-              strokeLinecap="round"
-              strokeLinejoin="round"
-              strokeWidth={2}
-              d="M19 9l-7 7-7-7"
-            />
-          </svg>
+        {selectedLabel}
+        <span>
+          <KeyboardArrowDownIcon
+            className={cn(
+              "w-5 h-5",
+              "transform transition-transform ease-linear",
+              isOpen ? "rotate-180" : "rotate-0",
+              isDisabled ? "text-white" : "text-gray-400",
+            )}
+          />
         </span>
+
       </button>
-      <ul className={`absolute left-0 mt-2 w-full bg-white border border-gray-300 rounded-md shadow-lg overflow-hidden transition-all duration-300 ease-in transform p-[10px]
-        ${isOpen ?
+      <ul className={cn(
+        "absolute left-0",
+        "w-full mt-2 p-[10px] overflow-hidden bg-white",
+        "border border-gray-300",
+        "transition-all duration-300 ease-in transform",
+        "rounded-md shadow-lg",
+        isOpen ?
           "max-h-64 opacity-100 scale-y-100"
           :
-          "max-h-0 opacity-0 scale-y-95"}`
-      }
+          "max-h-0 opacity-0 scale-y-95"
+      )}
       >
         {options.map((option) => (
           <li
             key={option.value}
-            onClick={() => handleSelect(option.value, option.label)}
-            className="px-4 py-2 rounded-[5px]
-              text-basic-400
-              hover:bg-primary-lightest
-              cursor-pointer"
+            className="px-0"
           >
-            {option.label}
+            <button
+              type="button"
+              className={cn(
+                "w-full px-2 py-2 rounded-[5px] text-basic-400 text-left",
+                "hover:bg-primary-lightest hover:cursor-pointer",
+                "focus:bg-primary-lightest focus:ring-0 focus:outline-none"
+              )}
+              onClick={() => handleSelect(option.label)}
+            >
+              {option.label}
+            </button>
           </li>
         ))}
       </ul>
diff --git a/components/Projects/GoBackButton.tsx b/components/Projects/GoBackButton.tsx
index b9e0ee25..2e2101ad 100644
--- a/components/Projects/GoBackButton.tsx
+++ b/components/Projects/GoBackButton.tsx
@@ -1,5 +1,5 @@
-import KeyboardArrowLeftIcon from '@mui/icons-material/KeyboardArrowLeft';
 import { cn } from '@/utils/cn';
+import React from 'react';
 
 /**
  * Button component for rendering customizable buttons.
@@ -15,6 +15,8 @@ import { cn } from '@/utils/cn';
  *  - The text displayed on the button.
  * @param {string} [className]
  *  - Optional custom classes to apply to the button (uses Tailwind CSS).
+ * @param {React.ReactNode} [icon]
+ *  - Optional custom icon to apply on the button. Typically, a MUI Icon component.
  * @param {() => void} onClick
  *  - Function to call when the button is clicked.
  * @returns {JSX.Element} The button element.
@@ -22,6 +24,7 @@ import { cn } from '@/utils/cn';
 
 interface ButtonProps {
   id: string,
+  icon?: React.ReactNode,
   buttonText: string;
   className?: string;
   onClick: () => void;
@@ -32,6 +35,7 @@ const GoBackButton = ({
   className = "",
   id = "",
   onClick = () => { },
+  icon = null,
 }: ButtonProps
 ) => {
   return (
@@ -40,12 +44,12 @@ const GoBackButton = ({
       name={id}
       type="button"
       onClick={onClick}
-      className={cn(`flex flex-row items-center group`, className)}
+      className={cn(
+        "flex flex-row items-center group",
+        className
+      )}
     >
-      <KeyboardArrowLeftIcon className="
-      text-basic-400
-      group-hover:text-primary-base"
-      />
+      {icon && icon}
       <span className="
       text-basic-400 font-sans text-sm font-normal
       group-hover:text-primary-base"
diff --git a/layout/ProjectLayout.tsx b/layout/ProjectLayout.tsx
index 850efd0f..7d97c6e4 100644
--- a/layout/ProjectLayout.tsx
+++ b/layout/ProjectLayout.tsx
@@ -1,21 +1,12 @@
-import { useState, useEffect } from 'react';
 import { usePathname, useSearchParams } from 'next/navigation';
 
 import Sidebar from '@/shared/components/Sidebar';
 import DefaultLayout from './DefaultLayout';
 
 export default function ProjectLayout({ children }: React.PropsWithChildren) {
-  const [projectId, setProjectId] = useState(null);
   const pathname = usePathname();
   const searchParams = useSearchParams();
-  const id = searchParams.get('id');
-  useEffect(() => {
-    if (id) {
-      setProjectId(projectId);
-    } else {
-      setProjectId(null);
-    }
-  }, [id]);
+  const projectId = searchParams.get('id');
   return (
     <DefaultLayout>
       <div className="bg-primary-palest">
diff --git a/pages/manage/projects/index.jsx b/pages/manage/projects/index.jsx
index 6b49b93e..276c1b59 100644
--- a/pages/manage/projects/index.jsx
+++ b/pages/manage/projects/index.jsx
@@ -1,27 +1,28 @@
-import { useState, useEffect } from 'react';
 import { useRouter } from 'next/router';
 import { useSelector } from 'react-redux';
+import KeyboardArrowLeftIcon from '@mui/icons-material/KeyboardArrowLeft';
 import Select from '@/components/Projects/Form/Select';
-import AccessDenied from '@/components/Projects/AccessDenied';
+import AccessDenied from '@/shared/components/AccessDenied';
 import GoBackButton
   from '@/components/Projects/GoBackButton';
 import { ProtectedComponent } from '@/contexts/Auth';
 import emptyCoverImg from '@/public/assets/empty-cover.png';
 import CircleIcon from '@mui/icons-material/Circle';
-import MoreVertIcon from '@mui/icons-material/MoreVert';
 import More from '@/components/Projects/More';
+import Button from '@/shared/components/Button';
+import { cn } from '@/utils/cn';
 
 const Projects = () => {
   const maxProjects = 3;
   const router = useRouter();
-  const [isEditPermitted, setIsEditPermitted] = useState(false);
-  const [isAddedPermitted, setIsAddedPermitted] = useState(true);
   const userState = useSelector((state) => state.user);
+  const projects = Array.isArray(userState.marathons) ? userState.marathons : [];
+  const isEditPermitted = Boolean(projects.length);
+  const isAddedDenied = projects.length >= maxProjects;
   const options = [
     { value: "all", label: "全部計畫" },
     { value: "learning-marathon", label: "學習馬拉松" },
   ];
-  const [projects, setProjects] = useState([]);
   const getProjectType = (eventId) => {
     switch (eventId) {
       case "2025S1":
@@ -31,21 +32,6 @@ const Projects = () => {
     }
   };
 
-  useEffect(() => {
-    if (userState._id) {
-      if (userState.marathons.length) {
-        setProjects(userState.marathons);
-        setIsEditPermitted(true);
-      }
-    }
-  }, [userState]);
-
-  useEffect(() => {
-    if (projects.length > (maxProjects - 1)) {
-      setIsAddedPermitted(false);
-    }
-  }, [projects]);
-
   return (
     <ProtectedComponent>
       <div className="bg-[#F3FCFC] md:py-8">
@@ -59,11 +45,22 @@ const Projects = () => {
                 id: 'island'
               }
             })}
+            icon={
+              (
+                <KeyboardArrowLeftIcon
+                  className="
+                  text-basic-400
+                  group-hover:text-primary-base"
+                />
+              )}
             buttonText="返回 我的小島"
           />
           <h2 className="heading-md text-basic-400">學習計畫</h2>
           <div
-            className="w-full flex flex-col justify-between bg-white rounded-xl py-3 px-6"
+            className={cn(
+              "w-full flex flex-col justify-between bg-white rounded-xl",
+              "py-3 px-3 md:px-6")
+            }
             style={{
               boxShadow: '0px 4px 10px 0px rgba(196, 194, 193, 0.40)'
             }}
@@ -74,16 +71,16 @@ const Projects = () => {
                 options={options}
                 className="max-w-[200px]"
               />
-              <button
-                type="button"
-                className="flex-shrink-0 py-[5px] px-5 rounded-[20px] bg-primary-lighter text-white font-sans text-base font-normal hover:bg-primary-lighter"
-                disabled
+              <Button
+                isDisabled={isAddedDenied}
+                variant="solid"
+                className="hover:cursor-pointer flex-shrink-0"
               >
                 新增計畫
-              </button>
+              </Button>
             </div>
             {
-              !isAddedPermitted && (
+              isAddedDenied && (
                 <p className="font-sans font-normal text-[#FF9526]">
                   島上空間有限，計畫滿三個就不能再增加了{`><`}
                 </p>
@@ -135,12 +132,7 @@ const Projects = () => {
                             <CircleIcon className="text-primary-base max-w-2 max-h-2" />
                             <span className="font-sans text-xs font-bold leading-[140%]">{project.isPublic ? '公開' : '不公開'}</span>
                           </p>
-                          {/* <div className=""> */}
-                            <More
-                              // className=""
-                              projectId={project._id}
-                            />
-                          {/* </div> */}
+                          <More projectId={project._id} />
                         </div>
                       </div>
                     </div>
diff --git a/components/Projects/AccessDenied.tsx b/shared/components/AccessDenied.tsx
similarity index 70%
rename from components/Projects/AccessDenied.tsx
rename to shared/components/AccessDenied.tsx
index f7a3d9f8..302b4687 100644
--- a/components/Projects/AccessDenied.tsx
+++ b/shared/components/AccessDenied.tsx
@@ -1,6 +1,6 @@
 import { useRouter } from 'next/router';
 import AccessDeniedImg from '@/public/assets/projects/access-denied.png';
-import Button from "./Form/Button";
+import Button from "@/shared/components/Button";
 
 const AccessDenied = () => {
   const router = useRouter();
@@ -12,11 +12,11 @@ const AccessDenied = () => {
       rounded-2xl"
     >
       <p className="
-      font-sans
+        font-sans
       text-basic-400
-      text-sm
-      font-bold
-      leading-[140%]
+        text-sm
+        font-bold
+        leading-[140%]
       "
       >
         這裡目前只開放給
@@ -33,19 +33,19 @@ const AccessDenied = () => {
       <div className="w-full flex flex-col gap-3 justify-center md:flex-row">
         <Button
           id="editMyCardButton"
-          onClick={() => router.push('/')}
-          buttonText="編輯個人名片"
-          buttonStyle="outline"
-        />
+          onClick={() => router.push('/manage/mycard')}
+          variant="outline"
+          color="primary"
+        >
+          編輯個人名片
+        </Button>
         <Button
           id="findResourcesButton"
-          onClick={() => router.push('/')}
-          buttonText="尋找學習資源"
-          buttonStyle="default"
-          style={{
-            boxShadow: '0px 4px 10px 0px rgba(89, 182, 178, 0.5)'
-          }}
-        />
+          variant="solid"
+          onClick={() => router.push('/resources')}
+        >
+          查看學習資源
+        </Button>
       </div>
     </div>
   );
diff --git a/shared/components/Button.tsx b/shared/components/Button.tsx
index 2022c9da..592a0479 100644
--- a/shared/components/Button.tsx
+++ b/shared/components/Button.tsx
@@ -54,7 +54,7 @@ function Button({
         variant === ButtonVariantEnum.Outline && [
           'rounded-full border border-solid transition-colors',
           color === ButtonColorEnum.Primary &&
-            'border-primary-base text-basic-400 hover:bg-primary hover:text-basic-white',
+            'border-primary-base text-primary-base hover:bg-primary-base hover:text-basic-white',
           color === ButtonColorEnum.White &&
             'border-basic-white text-basic-white hover:bg-basic-white hover:text-primary-base',
         ],