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diff --git a/src/pages/NotFound.vue b/src/pages/NotFound.vue
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+++ b/src/pages/NotFound.vue
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+<template>
+    <div>
+        <!-- Desktop header -->
+        <header v-if="! $root.isMobile" class="d-flex flex-wrap justify-content-center py-3 mb-3 border-bottom">
+            <router-link to="/" class="d-flex align-items-center mb-3 mb-md-0 me-md-auto text-dark text-decoration-none">
+                <object class="bi me-2 ms-4" width="40" height="40" data="/icon.svg" />
+                <span class="fs-4 title">Uptime Kuma</span>
+            </router-link>
+        </header>
+
+        <!-- Mobile header -->
+        <header v-else class="d-flex flex-wrap justify-content-center pt-2 pb-2 mb-3">
+            <router-link to="/dashboard" class="d-flex align-items-center text-dark text-decoration-none">
+                <object class="bi" width="40" height="40" data="/icon.svg" />
+                <span class="fs-4 title ms-2">Uptime Kuma</span>
+            </router-link>
+        </header>
+
+        <div class="content">
+            <div>
+                <strong>🐻 {{ $t("Page Not Found") }}</strong>
+            </div>
+
+            <div class="guide">
+                {{ $t("Most likely causes:") }}
+                <ul>
+                    <li>{{ $t("The resource is no longer available.") }}</li>
+                    <li>{{ $t("There might be a typing error in the address.") }}</li>
+                </ul>
+
+                {{ $t("What you can try:") }}<br />
+                <ul>
+                    <li>{{ $t("Retype the address.") }}</li>
+                    <li><a href="#" class="go-back" @click="goBack()">{{ $t("Go back to the previous page.") }}</a></li>
+                    <li><a href="/" class="go-back">{{ $t("Go back to home page.") }}</a></li>
+                </ul>
+            </div>
+        </div>
+    </div>
+</template>
+
+<script>
+export default {
+    async mounted() {
+
+    },
+    methods: {
+        /**
+         * Go back 1 in browser history
+         * @returns {void}
+         */
+        goBack() {
+            history.back();
+        }
+    }
+};
+</script>
+
+<style scoped lang="scss">
+@import "../assets/vars.scss";
+
+.go-back {
+    text-decoration: none;
+    color: $primary !important;
+}
+
+.content {
+    display: flex;
+    justify-content: center;
+    align-content: center;
+    align-items: center;
+    flex-direction: column;
+    gap: 50px;
+    padding-top: 30px;
+
+    strong {
+        font-size: 24px;
+    }
+}
+
+.guide {
+    max-width: 800px;
+    font-size: 14px;
+}
+
+.title {
+    font-weight: bold;
+}
+
+.dark {
+    header {
+        background-color: $dark-header-bg;
+        border-bottom-color: $dark-header-bg !important;
+
+        span {
+            color: #f0f6fc;
+        }
+    }
+
+    .bottom-nav {
+        background-color: $dark-bg;
+    }
+}
+</style>