diff --git a/app/components/Community.tsx b/app/components/Community.tsx
index 6cc9186..a76f9b5 100644
--- a/app/components/Community.tsx
+++ b/app/components/Community.tsx
@@ -15,44 +15,44 @@ const linkIcons: Record<(typeof linkKeys)[number], string> = {
 export default function Community() {
   const { t } = useTranslation("community");
   return (
-    <section id="community" className="py-20 sm:py-28">
+    <section id="community" className="py-20 sm:py-28 dark:bg-slate-950">
       <div className="mx-auto max-w-7xl px-4 sm:px-6 lg:px-8">
         {/* 数字游民社区 - 优化布局 */}
         <div className="mb-20">
           <Link
             href="/join"
-            className="group block overflow-hidden rounded-2xl border border-sky-200/80 bg-gradient-to-br from-sky-50 via-white to-cyan-50/60 p-8 shadow-sm transition-all duration-300 hover:border-sky-300 hover:shadow-xl hover:shadow-sky-100/50 sm:p-10"
+            className="group block overflow-hidden rounded-2xl border border-sky-200/80 bg-gradient-to-br from-sky-50 via-white to-cyan-50/60 p-8 shadow-sm transition-all duration-300 hover:border-sky-300 hover:shadow-xl hover:shadow-sky-100/50 dark:border-sky-800/80 dark:from-sky-900/30 dark:via-slate-900 dark:to-cyan-900/20 dark:hover:border-sky-700 dark:hover:shadow-sky-900/30 sm:p-10"
           >
             <div className="flex flex-col gap-6 sm:flex-row sm:items-center sm:justify-between">
               <div className="flex-1">
-                <div className="mb-3 inline-flex items-center gap-2 rounded-full bg-sky-100 px-4 py-1.5 text-sm font-semibold text-sky-700">
+                <div className="mb-3 inline-flex items-center gap-2 rounded-full bg-sky-100 px-4 py-1.5 text-sm font-semibold text-sky-700 dark:bg-sky-900/50 dark:text-sky-300">
                   <span className="text-lg">👥</span>
                   {t("nomadCommunity")}
                 </div>
-                <h3 className="mb-3 text-2xl font-bold tracking-tight text-slate-900 sm:text-3xl">
+                <h3 className="mb-3 text-2xl font-bold tracking-tight text-slate-900 dark:text-slate-100 sm:text-3xl">
                   {t("joinTitle")}
                 </h3>
-                <p className="mb-4 max-w-xl text-base leading-relaxed text-slate-600">
+                <p className="mb-4 max-w-xl text-base leading-relaxed text-slate-600 dark:text-slate-400">
                   {t("joinDesc")}
                 </p>
                 <div className="flex flex-wrap gap-3">
-                  <span className="rounded-lg bg-white/90 px-3 py-1.5 text-sm font-medium text-slate-600 shadow-sm">
+                  <span className="rounded-lg bg-white/90 px-3 py-1.5 text-sm font-medium text-slate-600 shadow-sm dark:bg-slate-800/90 dark:text-slate-300">
                     {t("applyForm")}
                   </span>
-                  <span className="rounded-lg bg-white/90 px-3 py-1.5 text-sm font-medium text-slate-600 shadow-sm">
+                  <span className="rounded-lg bg-white/90 px-3 py-1.5 text-sm font-medium text-slate-600 shadow-sm dark:bg-slate-800/90 dark:text-slate-300">
                     {t("approveJoin")}
                   </span>
                 </div>
               </div>
-              <div className="flex shrink-0 items-center gap-4 rounded-2xl bg-white/90 p-6 shadow-md backdrop-blur-sm transition-transform group-hover:scale-[1.02] sm:p-8">
+              <div className="flex shrink-0 items-center gap-4 rounded-2xl bg-white/90 p-6 shadow-md backdrop-blur-sm transition-transform dark:bg-slate-800/90 group-hover:scale-[1.02] sm:p-8">
                 <div className="flex h-16 w-16 items-center justify-center rounded-2xl bg-gradient-to-br from-sky-400 to-cyan-500 text-3xl shadow-lg shadow-sky-200/50">
                   📝
                 </div>
                 <div className="text-left">
-                  <div className="font-bold text-slate-800">
+                  <div className="font-bold text-slate-800 dark:text-slate-200">
                     {t("applyNow")}
                   </div>
-                  <div className="mt-1 text-sm text-slate-500">
+                  <div className="mt-1 text-sm text-slate-500 dark:text-slate-400">
                     {t("applyHint")}
                   </div>
                 </div>
@@ -62,13 +62,13 @@ export default function Community() {
         </div>
 
         <div className="text-center">
-          <div className="mb-2 text-sm font-semibold text-slate-400">
+          <div className="mb-2 text-sm font-semibold text-slate-400 dark:text-slate-500">
             {t("openSource")}
           </div>
-          <h2 className="text-3xl font-bold tracking-tight sm:text-4xl">
+          <h2 className="text-3xl font-bold tracking-tight text-slate-900 dark:text-slate-100 sm:text-4xl">
             {t("contributeTitle")} <span className="gradient-text">{t("contributeHighlight")}</span>
           </h2>
-          <p className="mx-auto mt-4 max-w-2xl text-lg text-slate-600">
+          <p className="mx-auto mt-4 max-w-2xl text-lg text-slate-600 dark:text-slate-400">
             {t("contributeSubtitle")}
             <br />
             {t("contributeSubtitle2")}
@@ -79,14 +79,14 @@ export default function Community() {
           {linkKeys.map((key) => (
             <div
               key={key}
-              className="card-hover flex items-start gap-4 rounded-xl border border-slate-100 bg-white p-5 shadow-sm"
+              className="card-hover flex items-start gap-4 rounded-xl border border-slate-100 bg-white p-5 shadow-sm dark:border-slate-800 dark:bg-slate-900"
             >
-              <span className="flex h-10 w-10 shrink-0 items-center justify-center rounded-lg bg-slate-50 text-xl">
+              <span className="flex h-10 w-10 shrink-0 items-center justify-center rounded-lg bg-slate-50 text-xl dark:bg-slate-800">
                 {linkIcons[key]}
               </span>
               <div>
-                <h4 className="font-bold text-slate-900">{t(`links.${key}.title`)}</h4>
-                <p className="mt-1 text-sm text-slate-500">{t(`links.${key}.desc`)}</p>
+                <h4 className="font-bold text-slate-900 dark:text-slate-100">{t(`links.${key}.title`)}</h4>
+                <p className="mt-1 text-sm text-slate-500 dark:text-slate-400">{t(`links.${key}.desc`)}</p>
                 <span className="mt-2 inline-block text-sm font-medium text-sky-600">
                   {t(`links.${key}.label`)}
                 </span>
@@ -96,15 +96,15 @@ export default function Community() {
         </div>
 
         <div className="mt-12 text-center">
-          <div className="mb-4 text-lg font-bold text-slate-900">
+          <div className="mb-4 text-lg font-bold text-slate-900 dark:text-slate-100">
             {t("betterTitle")}
           </div>
-          <p className="mb-6 text-slate-600">
+          <p className="mb-6 text-slate-600 dark:text-slate-400">
             {t("betterDesc")}
             <br />
             {t("betterDesc2")}
           </p>
-          <button className="inline-flex items-center gap-2 rounded-full bg-slate-900 px-8 py-3 font-semibold text-white transition-colors hover:bg-slate-800">
+          <button className="inline-flex items-center gap-2 rounded-full bg-slate-900 px-8 py-3 font-semibold text-white transition-colors hover:bg-slate-800 dark:bg-slate-100 dark:text-slate-900 dark:hover:bg-slate-200">
             {t("starFork")}
           </button>
         </div>
diff --git a/app/components/Features.tsx b/app/components/Features.tsx
index 2f57ba4..4ea6b42 100644
--- a/app/components/Features.tsx
+++ b/app/components/Features.tsx
@@ -11,13 +11,13 @@ export default function Features() {
     key,
   }));
   return (
-    <section id="features" className="py-20 sm:py-28">
+    <section id="features" className="py-20 sm:py-28 dark:bg-slate-950">
       <div className="mx-auto max-w-7xl px-4 sm:px-6 lg:px-8">
         <div className="text-center">
-          <h2 className="text-3xl font-bold tracking-tight sm:text-4xl">
+          <h2 className="text-3xl font-bold tracking-tight text-slate-900 dark:text-slate-100 sm:text-4xl">
             {t("title")} <span className="gradient-text">{t("titleHighlight")}</span>{t("titleSuffix")}
           </h2>
-          <p className="mx-auto mt-4 max-w-2xl text-lg text-slate-600">
+          <p className="mx-auto mt-4 max-w-2xl text-lg text-slate-600 dark:text-slate-400">
             {t("subtitle")}
             <br className="hidden sm:block" />
             {t("subtitle2")}
@@ -28,21 +28,21 @@ export default function Features() {
           {features.map((f) => (
             <div
               key={f.key}
-              className="card-hover rounded-2xl border border-slate-100 bg-white p-8 shadow-sm"
+              className="card-hover rounded-2xl border border-slate-100 bg-white p-8 shadow-sm dark:border-slate-800 dark:bg-slate-900"
             >
-              <div className="mb-4 flex h-14 w-14 items-center justify-center rounded-2xl bg-sky-50 text-3xl">
+              <div className="mb-4 flex h-14 w-14 items-center justify-center rounded-2xl bg-sky-50 text-3xl dark:bg-sky-900/50">
                 {f.icon}
               </div>
-              <h3 className="mb-3 text-xl font-bold text-slate-900">
+              <h3 className="mb-3 text-xl font-bold text-slate-900 dark:text-slate-100">
                 {t(`items.${f.key}.title`)}
               </h3>
-              <p className="leading-relaxed text-slate-600">{t(`items.${f.key}.desc`)}</p>
+              <p className="leading-relaxed text-slate-600 dark:text-slate-400">{t(`items.${f.key}.desc`)}</p>
             </div>
           ))}
         </div>
 
         <div className="mt-12 text-center">
-          <div className="inline-flex items-center gap-2 rounded-full border border-amber-200 bg-amber-50 px-5 py-2 text-sm font-medium text-amber-700">
+          <div className="inline-flex items-center gap-2 rounded-full border border-amber-200 bg-amber-50 px-5 py-2 text-sm font-medium text-amber-700 dark:border-amber-800 dark:bg-amber-900/50 dark:text-amber-300">
             <span>🔥</span>
             {t("stat")} <span className="font-bold">{t("statCount")}</span> {t("statSuffix")}
           </div>
diff --git a/app/components/Footer.tsx b/app/components/Footer.tsx
index ea8bda9..f7e417b 100644
--- a/app/components/Footer.tsx
+++ b/app/components/Footer.tsx
@@ -43,15 +43,15 @@ const footerSections = [
 export default function Footer() {
   const { t } = useTranslation("footer");
   return (
-    <footer className="border-t border-slate-100 bg-white">
+    <footer className="border-t border-slate-100 bg-white dark:border-slate-800 dark:bg-slate-900">
       <div className="mx-auto max-w-7xl px-4 py-12 sm:px-6 lg:px-8 lg:py-16">
         <div className="grid gap-8 sm:grid-cols-2 lg:grid-cols-5">
           <div className="lg:col-span-1">
-            <Link href="/" className="flex items-center gap-2 text-lg font-bold">
+            <Link href="/" className="flex items-center gap-2 text-lg font-bold text-slate-900 dark:text-slate-100">
               <span className="text-2xl">🌍</span>
               <span>{t("siteName")}</span>
             </Link>
-            <p className="mt-3 text-sm leading-relaxed text-slate-500">
+            <p className="mt-3 text-sm leading-relaxed text-slate-500 dark:text-slate-400">
               {t("tagline")}
               <br />
               {t("tagline2")}
@@ -60,7 +60,7 @@ export default function Footer() {
 
           {footerSections.map((section) => (
             <div key={section.titleKey}>
-              <h4 className="mb-4 text-sm font-bold text-slate-900">
+              <h4 className="mb-4 text-sm font-bold text-slate-900 dark:text-slate-100">
                 {t(`sections.${section.titleKey}`)}
               </h4>
               <ul className="space-y-2.5">
@@ -68,7 +68,7 @@ export default function Footer() {
                   <li key={link.labelKey}>
                     <a
                       href={link.href}
-                      className="text-sm text-slate-500 transition-colors hover:text-slate-700"
+                      className="text-sm text-slate-500 transition-colors hover:text-slate-700 dark:text-slate-400 dark:hover:text-slate-200"
                     >
                       {t(`links.${link.labelKey}`)}
                     </a>
@@ -79,11 +79,11 @@ export default function Footer() {
           ))}
         </div>
 
-        <div className="mt-12 flex flex-col items-center justify-between gap-4 border-t border-slate-100 pt-8 sm:flex-row">
-          <p className="text-sm text-slate-400">
+        <div className="mt-12 flex flex-col items-center justify-between gap-4 border-t border-slate-100 pt-8 dark:border-slate-800 sm:flex-row">
+          <p className="text-sm text-slate-400 dark:text-slate-500">
             {t("madeBy")}
           </p>
-          <p className="text-sm text-slate-400">{t("openSource")}</p>
+          <p className="text-sm text-slate-400 dark:text-slate-500">{t("openSource")}</p>
         </div>
       </div>
     </footer>
diff --git a/app/components/Header.tsx b/app/components/Header.tsx
index 6ff67bf..e772b5c 100644
--- a/app/components/Header.tsx
+++ b/app/components/Header.tsx
@@ -3,6 +3,7 @@
 import { useState, useEffect } from "react";
 import { Link, useLocale, usePathname, useRouter, useTranslation } from "@/i18n/navigation";
 import AuthModal from "./AuthModal";
+import ThemeToggle from "./ThemeToggle";
 
 const navLinks = [
   { labelKey: "roadmap" as const, href: "#roadmap" },
@@ -47,13 +48,13 @@ export default function Header() {
     <header
       className={`fixed top-0 left-0 right-0 z-50 transition-all duration-300 ${
         scrolled
-          ? "bg-white/80 backdrop-blur-lg shadow-sm"
+          ? "bg-white/80 backdrop-blur-lg shadow-sm dark:bg-slate-900/80 dark:shadow-slate-950/50"
           : "bg-transparent"
       }`}
     >
       <div className="mx-auto max-w-7xl px-4 sm:px-6 lg:px-8">
         <div className="flex h-16 items-center justify-between">
-          <Link href="/" className="flex items-center gap-2 text-lg font-bold">
+          <Link href="/" className="flex items-center gap-2 text-lg font-bold text-slate-900 dark:text-slate-100">
             <span className="text-2xl">🌍</span>
             <span className="hidden sm:inline">{t("siteName")}</span>
             <span className="sm:hidden">{t("siteNameShort")}</span>
@@ -64,7 +65,7 @@ export default function Header() {
               <a
                 key={link.href}
                 href={link.href}
-                className="rounded-lg px-3 py-2 text-sm font-medium text-slate-600 transition-colors hover:bg-slate-100 hover:text-slate-900"
+                className="rounded-lg px-3 py-2 text-sm font-medium text-slate-600 transition-colors hover:bg-slate-100 hover:text-slate-900 dark:text-slate-400 dark:hover:bg-slate-800 dark:hover:text-slate-100"
               >
                 {tNav(link.labelKey)}
               </a>
@@ -72,7 +73,7 @@ export default function Header() {
             <button
               type="button"
               onClick={() => router.replace(pathname, { locale: locale === "zh" ? "en" : "zh" })}
-              className="rounded-lg px-3 py-2 text-sm font-medium text-slate-600 transition-colors hover:bg-slate-100 hover:text-slate-900"
+              className="rounded-lg px-3 py-2 text-sm font-medium text-slate-600 transition-colors hover:bg-slate-100 hover:text-slate-900 dark:text-slate-400 dark:hover:bg-slate-800 dark:hover:text-slate-100"
             >
               {locale === "zh" ? "EN" : "中文"}
             </button>
@@ -81,12 +82,12 @@ export default function Header() {
           <div className="flex items-center gap-3">
             {userEmail ? (
               <div className="flex items-center gap-2">
-                <span className="hidden max-w-[120px] truncate text-sm text-slate-600 sm:inline">
+                <span className="hidden max-w-[120px] truncate text-sm text-slate-600 dark:text-slate-400 sm:inline">
                   {userEmail}
                 </span>
                 <button
                   onClick={handleLogout}
-                  className="rounded-full border border-slate-200 px-4 py-2 text-sm font-medium text-slate-600 transition-colors hover:bg-slate-50"
+                  className="rounded-full border border-slate-200 px-4 py-2 text-sm font-medium text-slate-600 transition-colors hover:bg-slate-50 dark:border-slate-700 dark:text-slate-400 dark:hover:bg-slate-800"
                 >
                   {t("logout")}
                 </button>
@@ -94,21 +95,22 @@ export default function Header() {
             ) : (
               <button
                 onClick={() => setAuthOpen(true)}
-                className="hidden rounded-full border border-slate-200 px-4 py-2 text-sm font-medium text-slate-600 transition-colors hover:bg-slate-50 sm:inline-flex"
+                className="hidden rounded-full border border-slate-200 px-4 py-2 text-sm font-medium text-slate-600 transition-colors hover:bg-slate-50 dark:border-slate-700 dark:text-slate-400 dark:hover:bg-slate-800 sm:inline-flex"
               >
                 {t("loginRegister")}
               </button>
             )}
+            <ThemeToggle />
             <a
               href="#roadmap"
-              className="hidden rounded-full bg-sky-500 px-4 py-2 text-sm font-medium text-white transition-colors hover:bg-sky-600 sm:inline-flex"
+              className="hidden rounded-full bg-sky-500 px-4 py-2 text-sm font-medium text-white transition-colors hover:bg-sky-600 dark:bg-sky-600 dark:hover:bg-sky-500 sm:inline-flex"
             >
               {t("explore")}
             </a>
 
             <button
               onClick={() => setMobileOpen(!mobileOpen)}
-              className="inline-flex items-center justify-center rounded-lg p-2 text-slate-600 transition-colors hover:bg-slate-100 md:hidden"
+              className="inline-flex items-center justify-center rounded-lg p-2 text-slate-600 transition-colors hover:bg-slate-100 dark:text-slate-400 dark:hover:bg-slate-800 md:hidden"
               aria-label={t("toggleMenu")}
             >
               {mobileOpen ? (
@@ -126,14 +128,14 @@ export default function Header() {
       </div>
 
       {mobileOpen && (
-        <div className="border-t border-slate-100 bg-white/95 backdrop-blur-lg md:hidden">
+        <div className="border-t border-slate-100 bg-white/95 backdrop-blur-lg dark:border-slate-800 dark:bg-slate-900/95 md:hidden">
           <nav className="mx-auto max-w-7xl space-y-1 px-4 py-3">
             {navLinks.map((link) => (
               <a
                 key={link.href}
                 href={link.href}
                 onClick={() => setMobileOpen(false)}
-                className="block rounded-lg px-3 py-2.5 text-base font-medium text-slate-600 transition-colors hover:bg-slate-100 hover:text-slate-900"
+                className="block rounded-lg px-3 py-2.5 text-base font-medium text-slate-600 transition-colors hover:bg-slate-100 hover:text-slate-900 dark:text-slate-400 dark:hover:bg-slate-800 dark:hover:text-slate-100"
               >
                 {tNav(link.labelKey)}
               </a>
@@ -144,12 +146,12 @@ export default function Header() {
                 setMobileOpen(false);
                 router.replace(pathname, { locale: locale === "zh" ? "en" : "zh" });
               }}
-              className="block w-full rounded-lg px-3 py-2.5 text-left text-base font-medium text-slate-600 transition-colors hover:bg-slate-100 hover:text-slate-900"
+              className="block w-full rounded-lg px-3 py-2.5 text-left text-base font-medium text-slate-600 transition-colors hover:bg-slate-100 hover:text-slate-900 dark:text-slate-400 dark:hover:bg-slate-800 dark:hover:text-slate-100"
             >
               {locale === "zh" ? "EN" : "中文"}
             </button>
             {userEmail ? (
-              <div className="mt-2 flex items-center justify-between rounded-lg border border-slate-100 bg-slate-50 px-4 py-2.5">
+              <div className="mt-2 flex items-center justify-between rounded-lg border border-slate-100 bg-slate-50 px-4 py-2.5 dark:border-slate-700 dark:bg-slate-800">
                 <span className="truncate text-sm text-slate-600">{userEmail}</span>
                 <button
                   onClick={() => {
@@ -167,7 +169,7 @@ export default function Header() {
                   setMobileOpen(false);
                   setAuthOpen(true);
                 }}
-                className="mt-2 block w-full rounded-full border border-slate-200 px-4 py-2.5 text-center text-base font-medium text-slate-600"
+                className="mt-2 block w-full rounded-full border border-slate-200 px-4 py-2.5 text-center text-base font-medium text-slate-600 dark:border-slate-700 dark:text-slate-400"
               >
                 {t("loginRegister")}
               </button>
@@ -175,7 +177,7 @@ export default function Header() {
             <a
               href="#roadmap"
               onClick={() => setMobileOpen(false)}
-              className="mt-2 block rounded-full bg-sky-500 px-4 py-2.5 text-center text-base font-medium text-white transition-colors hover:bg-sky-600"
+              className="mt-2 block rounded-full bg-sky-500 px-4 py-2.5 text-center text-base font-medium text-white transition-colors hover:bg-sky-600 dark:bg-sky-600 dark:hover:bg-sky-500"
             >
               {t("explore")}
             </a>
diff --git a/app/components/Hero.tsx b/app/components/Hero.tsx
index 7d00f15..eac038d 100644
--- a/app/components/Hero.tsx
+++ b/app/components/Hero.tsx
@@ -13,26 +13,26 @@ export default function Hero() {
   ];
   return (
     <section className="relative overflow-hidden pt-24 pb-16 sm:pt-32 sm:pb-20">
-      <div className="pointer-events-none absolute inset-0 bg-gradient-to-b from-sky-50/80 via-white to-white" />
-      <div className="pointer-events-none absolute top-0 left-1/2 h-[600px] w-[800px] -translate-x-1/2 rounded-full bg-gradient-to-br from-sky-100/60 via-cyan-50/40 to-amber-50/30 blur-3xl" />
+      <div className="pointer-events-none absolute inset-0 bg-gradient-to-b from-sky-50/80 via-white to-white dark:from-slate-900 dark:via-slate-900 dark:to-slate-950" />
+      <div className="pointer-events-none absolute top-0 left-1/2 h-[600px] w-[800px] -translate-x-1/2 rounded-full bg-gradient-to-br from-sky-100/60 via-cyan-50/40 to-amber-50/30 blur-3xl dark:from-sky-900/20 dark:via-slate-800/30 dark:to-amber-900/10" />
 
       <div className="relative mx-auto max-w-7xl px-4 sm:px-6 lg:px-8">
         <div className="text-center">
-          <div className="mb-6 inline-flex items-center gap-2 rounded-full border border-sky-200 bg-sky-50 px-4 py-1.5 text-sm font-medium text-sky-700">
+          <div className="mb-6 inline-flex items-center gap-2 rounded-full border border-sky-200 bg-sky-50 px-4 py-1.5 text-sm font-medium text-sky-700 dark:border-sky-800 dark:bg-sky-900/50 dark:text-sky-300">
             <span>🎒</span>
             <span>{t("badge")}</span>
           </div>
 
-          <h1 className="mx-auto max-w-4xl text-4xl font-extrabold tracking-tight sm:text-5xl lg:text-7xl">
+          <h1 className="mx-auto max-w-4xl text-4xl font-extrabold tracking-tight text-slate-900 dark:text-slate-100 sm:text-5xl lg:text-7xl">
             <span className="gradient-text">{t("title")}</span>
             <br className="sm:hidden" />
             {t("titleSuffix")}
           </h1>
 
-          <p className="mx-auto mt-6 max-w-2xl text-lg leading-relaxed text-slate-600 sm:text-xl">
+          <p className="mx-auto mt-6 max-w-2xl text-lg leading-relaxed text-slate-600 dark:text-slate-400 sm:text-xl">
             {t("subtitle")}
             <br className="hidden sm:block" />
-            <span className="text-slate-400 sm:text-slate-600">
+            <span className="text-slate-400 dark:text-slate-500 sm:text-slate-600">
               {t("subtitleEn")}
             </span>
           </p>
@@ -47,7 +47,7 @@ export default function Hero() {
             </a>
             <a
               href="#community"
-              className="inline-flex w-full items-center justify-center gap-2 rounded-full border border-slate-200 bg-white px-8 py-3.5 text-base font-semibold text-slate-700 shadow-sm transition-all hover:border-slate-300 hover:bg-slate-50 sm:w-auto"
+              className="inline-flex w-full items-center justify-center gap-2 rounded-full border border-slate-200 bg-white px-8 py-3.5 text-base font-semibold text-slate-700 shadow-sm transition-all hover:border-slate-300 hover:bg-slate-50 dark:border-slate-700 dark:bg-slate-800 dark:text-slate-200 dark:hover:border-slate-600 dark:hover:bg-slate-700 sm:w-auto"
             >
               {t("ctaResources")}
             </a>
@@ -60,12 +60,12 @@ export default function Hero() {
             {[...stats, ...stats].map((s, i) => (
               <div
                 key={i}
-                className="flex shrink-0 items-center gap-3 rounded-2xl border border-slate-100 bg-white/80 px-6 py-4 shadow-sm backdrop-blur-sm"
+                className="flex shrink-0 items-center gap-3 rounded-2xl border border-slate-100 bg-white/80 px-6 py-4 shadow-sm backdrop-blur-sm dark:border-slate-700 dark:bg-slate-800/80"
               >
                 <span className="text-2xl font-bold text-sky-600 sm:text-3xl">
                   {s.value}
                 </span>
-                <span className="text-sm font-medium text-slate-500">
+                <span className="text-sm font-medium text-slate-500 dark:text-slate-400">
                   {t(`stats.${s.labelKey}`)}
                 </span>
               </div>
@@ -78,12 +78,12 @@ export default function Hero() {
             {[...stats, ...stats].map((s, i) => (
               <div
                 key={i}
-                className="flex shrink-0 items-center gap-3 rounded-2xl border border-slate-100 bg-white/80 px-6 py-4 shadow-sm backdrop-blur-sm"
+                className="flex shrink-0 items-center gap-3 rounded-2xl border border-slate-100 bg-white/80 px-6 py-4 shadow-sm backdrop-blur-sm dark:border-slate-700 dark:bg-slate-800/80"
               >
                 <span className="text-2xl font-bold text-amber-500 sm:text-3xl">
                   {s.value}
                 </span>
-                <span className="text-sm font-medium text-slate-500">
+                <span className="text-sm font-medium text-slate-500 dark:text-slate-400">
                   {t(`stats.${s.labelKey}`)}
                 </span>
               </div>
diff --git a/app/components/Roadmap.tsx b/app/components/Roadmap.tsx
index 60a5214..04f3265 100644
--- a/app/components/Roadmap.tsx
+++ b/app/components/Roadmap.tsx
@@ -15,13 +15,13 @@ const days = [
 export default function Roadmap() {
   const { t } = useTranslation("roadmap");
   return (
-    <section id="roadmap" className="bg-slate-50 py-20 sm:py-28">
+    <section id="roadmap" className="bg-slate-50 py-20 sm:py-28 dark:bg-slate-900">
       <div className="mx-auto max-w-7xl px-4 sm:px-6 lg:px-8">
         <div className="text-center">
-          <h2 className="text-3xl font-bold tracking-tight sm:text-4xl">
+          <h2 className="text-3xl font-bold tracking-tight text-slate-900 dark:text-slate-100 sm:text-4xl">
             {t("title")} <span className="gradient-text">{t("titleHighlight")}</span>
           </h2>
-          <p className="mx-auto mt-4 max-w-2xl text-lg text-slate-600">
+          <p className="mx-auto mt-4 max-w-2xl text-lg text-slate-600 dark:text-slate-400">
             {t("subtitle")}
           </p>
         </div>
@@ -31,7 +31,7 @@ export default function Roadmap() {
             <Link
               key={d.day}
               href={`/day/${d.day}`}
-              className="card-hover group flex flex-col rounded-2xl border border-slate-100 bg-white p-5 shadow-sm transition-all hover:border-sky-200 hover:shadow-md"
+              className="card-hover group flex flex-col rounded-2xl border border-slate-100 bg-white p-5 shadow-sm transition-all hover:border-sky-200 hover:shadow-md dark:border-slate-800 dark:bg-slate-800 dark:hover:border-sky-700"
             >
               <div className="flex items-center gap-3">
                 <div
@@ -40,21 +40,21 @@ export default function Roadmap() {
                   DAY {d.day}
                 </div>
                 <span className="text-xl">{d.icon}</span>
-                <h3 className="text-base font-bold text-slate-900 group-hover:text-sky-600">
+                <h3 className="text-base font-bold text-slate-900 group-hover:text-sky-600 dark:text-slate-100 dark:group-hover:text-sky-400">
                   {t(`days.${d.day}.title`)}
                 </h3>
               </div>
-              <p className="mt-3 flex-1 text-sm leading-relaxed text-slate-600">
+              <p className="mt-3 flex-1 text-sm leading-relaxed text-slate-600 dark:text-slate-400">
                 {t(`days.${d.day}.desc`)}
               </p>
-              <span className="mt-3 inline-flex items-center text-sm font-medium text-sky-600">
+              <span className="mt-3 inline-flex items-center text-sm font-medium text-sky-600 dark:text-sky-400">
                 {t("viewDetails")}
               </span>
             </Link>
           ))}
           <Link
             href="/ebook"
-            className="card-hover group flex flex-col rounded-2xl border border-slate-100 bg-white p-5 shadow-sm transition-all hover:border-sky-200 hover:shadow-md"
+            className="card-hover group flex flex-col rounded-2xl border border-slate-100 bg-white p-5 shadow-sm transition-all hover:border-sky-200 hover:shadow-md dark:border-slate-800 dark:bg-slate-800 dark:hover:border-sky-700"
           >
             <div className="flex items-center gap-3">
               <div className="flex h-10 w-10 shrink-0 items-center justify-center rounded-lg bg-gradient-to-r from-sky-500 to-cyan-500 text-xs font-bold text-white">
@@ -73,19 +73,19 @@ export default function Roadmap() {
           </Link>
         </div>
 
-        <div className="mt-16 overflow-hidden rounded-2xl border border-amber-200 bg-gradient-to-r from-amber-50 to-orange-50 p-8 text-center sm:p-10">
-          <div className="mb-2 text-sm font-semibold text-amber-600">
+        <div className="mt-16 overflow-hidden rounded-2xl border border-amber-200 bg-gradient-to-r from-amber-50 to-orange-50 p-8 text-center dark:border-amber-800 dark:from-amber-900/30 dark:to-orange-900/30 sm:p-10">
+          <div className="mb-2 text-sm font-semibold text-amber-600 dark:text-amber-400">
             {t("course.tag")}
           </div>
           <h3 className="text-2xl font-bold text-slate-900">
             {t("course.title")}
           </h3>
-          <p className="mx-auto mt-3 max-w-xl text-slate-600">
+          <p className="mx-auto mt-3 max-w-xl text-slate-600 dark:text-slate-400">
             {t("course.desc")}
           </p>
           <Link
             href="/course"
-            className="mt-6 inline-flex items-center gap-2 rounded-full bg-amber-500 px-8 py-3 font-semibold text-white transition-colors hover:bg-amber-600"
+            className="mt-6 inline-flex items-center gap-2 rounded-full bg-amber-500 px-8 py-3 font-semibold text-white transition-colors hover:bg-amber-600 dark:bg-amber-600 dark:hover:bg-amber-500"
           >
             {t("course.cta")}
           </Link>
diff --git a/app/components/ThemeToggle.tsx b/app/components/ThemeToggle.tsx
new file mode 100644
index 0000000..68282eb
--- /dev/null
+++ b/app/components/ThemeToggle.tsx
@@ -0,0 +1,47 @@
+"use client";
+
+import { useTheme } from "../context/ThemeContext";
+
+export default function ThemeToggle() {
+  const { theme, toggleTheme } = useTheme();
+
+  return (
+    <button
+      type="button"
+      onClick={toggleTheme}
+      className="rounded-lg p-2 text-slate-600 transition-colors hover:bg-slate-100 hover:text-slate-900 dark:text-slate-400 dark:hover:bg-slate-800 dark:hover:text-slate-100"
+      aria-label={theme === "dark" ? "切换到日间模式" : "切换到夜间模式"}
+      title={theme === "dark" ? "日间模式" : "夜间模式"}
+    >
+      {theme === "dark" ? (
+        <svg
+          className="h-5 w-5"
+          fill="none"
+          viewBox="0 0 24 24"
+          stroke="currentColor"
+          strokeWidth={1.5}
+        >
+          <path
+            strokeLinecap="round"
+            strokeLinejoin="round"
+            d="M12 3v2.25m6.364.386l-1.591 1.591M21 12h-2.25m-.386 6.364l-1.591-1.591M12 18.75V21m-4.773-4.227l-1.591 1.591M5.25 12H3m4.227-4.773L5.636 5.636M15.75 12a3.75 3.75 0 11-7.5 0 3.75 3.75 0 017.5 0z"
+          />
+        </svg>
+      ) : (
+        <svg
+          className="h-5 w-5"
+          fill="none"
+          viewBox="0 0 24 24"
+          stroke="currentColor"
+          strokeWidth={1.5}
+        >
+          <path
+            strokeLinecap="round"
+            strokeLinejoin="round"
+            d="M21.752 15.002A9.718 9.718 0 0118 15.75c-5.385 0-9.75-4.365-9.75-9.75 0-1.33.266-2.597.748-3.752A9.753 9.753 0 003 11.25C3 16.635 7.365 21 12.75 21a9.753 9.753 0 009.002-5.998z"
+          />
+        </svg>
+      )}
+    </button>
+  );
+}
diff --git a/app/components/Tools.tsx b/app/components/Tools.tsx
index 230b1e0..193ad85 100644
--- a/app/components/Tools.tsx
+++ b/app/components/Tools.tsx
@@ -27,16 +27,16 @@ export default function Tools() {
     { value: "佣金", key: "affiliate" as const },
   ];
   return (
-    <section id="tools" className="py-20 sm:py-28">
+    <section id="tools" className="py-20 sm:py-28 dark:bg-slate-950">
       <div className="mx-auto max-w-7xl px-4 sm:px-6 lg:px-8">
         <div className="text-center">
-          <div className="mb-4 inline-flex items-center gap-2 rounded-full border border-sky-200 bg-sky-50 px-4 py-1.5 text-sm font-medium text-sky-700">
+          <div className="mb-4 inline-flex items-center gap-2 rounded-full border border-sky-200 bg-sky-50 px-4 py-1.5 text-sm font-medium text-sky-700 dark:border-sky-800 dark:bg-sky-900/50 dark:text-sky-300">
             {t("badge")}
           </div>
           <h2 className="text-3xl font-bold tracking-tight sm:text-4xl">
             <span className="gradient-text">{t("title")}</span>
           </h2>
-          <p className="mx-auto mt-4 max-w-2xl text-lg text-slate-600">
+          <p className="mx-auto mt-4 max-w-2xl text-lg text-slate-600 dark:text-slate-400">
             {t("subtitle")}
           </p>
         </div>
@@ -45,14 +45,14 @@ export default function Tools() {
           {categories.map((cat) => (
             <div
               key={cat.title}
-              className="card-hover group overflow-visible rounded-2xl border border-slate-100 bg-white shadow-sm"
+              className="card-hover group overflow-visible rounded-2xl border border-slate-100 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             >
               <div className={`h-1.5 bg-gradient-to-r ${cat.color}`} />
               <div className="p-5">
                 <div className="mb-3 flex items-center justify-between">
                   <div className="flex items-center gap-2">
                     <span className="text-2xl">{cat.icon}</span>
-                    <h3 className="font-bold text-slate-900">{cat.title}</h3>
+                    <h3 className="font-bold text-slate-900 dark:text-slate-100">{cat.title}</h3>
                   </div>
                   <span className={`rounded-full px-2 py-0.5 text-xs font-semibold ${cat.bg} ${cat.text}`}>
                     {cat.tools.length}
@@ -65,9 +65,9 @@ export default function Tools() {
                       href={tool.href}
                       target="_blank"
                       rel="noopener noreferrer"
-                      className="group/item flex items-center justify-between rounded-lg bg-slate-50 px-3 py-2 text-sm transition-colors hover:bg-slate-100/80 hover:text-sky-600"
+                      className="group/item flex items-center justify-between rounded-lg bg-slate-50 px-3 py-2 text-sm transition-colors hover:bg-slate-100/80 hover:text-sky-600 dark:bg-slate-800 dark:hover:bg-slate-700 dark:hover:text-sky-400"
                     >
-                      <span className="font-medium text-slate-700">{tool.name}</span>
+                      <span className="font-medium text-slate-700 dark:text-slate-300">{tool.name}</span>
                       <span className="relative text-slate-400">
                         {truncateDesc(tool.desc)}
                         {tool.desc && tool.desc.length > 5 && (
@@ -88,12 +88,12 @@ export default function Tools() {
           {toolStats.map((s) => (
             <div
               key={s.key}
-              className="rounded-2xl border border-slate-100 bg-white p-5 text-center shadow-sm"
+              className="rounded-2xl border border-slate-100 bg-white p-5 text-center shadow-sm dark:border-slate-800 dark:bg-slate-900"
             >
-              <div className="text-3xl font-extrabold text-sky-600">
+              <div className="text-3xl font-extrabold text-sky-600 dark:text-sky-400">
                 {s.value}
               </div>
-              <div className="mt-1 text-sm text-slate-500">{t(`stats.${s.key}`)}</div>
+              <div className="mt-1 text-sm text-slate-500 dark:text-slate-400">{t(`stats.${s.key}`)}</div>
             </div>
           ))}
         </div>
diff --git a/app/context/ThemeContext.tsx b/app/context/ThemeContext.tsx
new file mode 100644
index 0000000..e08af05
--- /dev/null
+++ b/app/context/ThemeContext.tsx
@@ -0,0 +1,68 @@
+"use client";
+
+import {
+  createContext,
+  useContext,
+  useEffect,
+  useState,
+  useCallback,
+  type ReactNode,
+} from "react";
+
+const STORAGE_KEY = "theme";
+
+export type Theme = "light" | "dark";
+
+type ThemeContextValue = {
+  theme: Theme;
+  setTheme: (theme: Theme) => void;
+  toggleTheme: () => void;
+};
+
+const ThemeContext = createContext<ThemeContextValue | null>(null);
+
+export function ThemeProvider({ children }: { children: ReactNode }) {
+  const [theme, setThemeState] = useState<Theme>("light");
+  const [mounted, setMounted] = useState(false);
+
+  useEffect(() => {
+    setMounted(true);
+    const hasDark = document.documentElement.classList.contains("dark");
+    setThemeState(hasDark ? "dark" : "light");
+  }, []);
+
+  useEffect(() => {
+    if (!mounted) return;
+    const root = document.documentElement;
+    if (theme === "dark") {
+      root.classList.add("dark");
+    } else {
+      root.classList.remove("dark");
+    }
+    localStorage.setItem(STORAGE_KEY, theme);
+  }, [theme, mounted]);
+
+  const setTheme = useCallback((newTheme: Theme) => {
+    setThemeState(newTheme);
+  }, []);
+
+  const toggleTheme = useCallback(() => {
+    setThemeState((prev) => (prev === "light" ? "dark" : "light"));
+  }, []);
+
+  const value: ThemeContextValue = {
+    theme,
+    setTheme,
+    toggleTheme,
+  };
+
+  return (
+    <ThemeContext.Provider value={value}>{children}</ThemeContext.Provider>
+  );
+}
+
+export function useTheme() {
+  const ctx = useContext(ThemeContext);
+  if (!ctx) throw new Error("useTheme must be used within ThemeProvider");
+  return ctx;
+}
diff --git a/app/globals.css b/app/globals.css
index 9afc8c4..c3d1d06 100644
--- a/app/globals.css
+++ b/app/globals.css
@@ -1,5 +1,7 @@
 @import "tailwindcss";
 
+@custom-variant dark (&:where(.dark, .dark *));
+
 @theme inline {
   --color-background: var(--background);
   --color-foreground: var(--foreground);
@@ -20,6 +22,11 @@
   --foreground: #0f172a;
 }
 
+.dark {
+  --background: #0f172a;
+  --foreground: #f8fafc;
+}
+
 @keyframes scroll {
   from { transform: translateX(0); }
   to { transform: translateX(-50%); }
@@ -64,6 +71,9 @@ html {
   transform: translateY(-4px);
   box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
 }
+.dark .card-hover:hover {
+  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
+}
 
 .resource-card {
   transition: all 0.2s ease;
@@ -79,6 +89,9 @@ html {
   line-height: 1.85;
   color: #334155;
 }
+.dark .prose-custom {
+  color: #94a3b8;
+}
 
 .prose-custom h1 {
   font-size: 2.25rem;
@@ -89,6 +102,9 @@ html {
   margin-bottom: 1rem;
   line-height: 1.2;
 }
+.dark .prose-custom h1 {
+  color: #f8fafc;
+}
 
 .prose-custom h2 {
   font-size: 1.5rem;
@@ -99,6 +115,10 @@ html {
   padding-bottom: 0.5rem;
   border-bottom: 1px solid #e2e8f0;
 }
+.dark .prose-custom h2 {
+  color: #f8fafc;
+  border-bottom-color: #334155;
+}
 
 .prose-custom h3 {
   font-size: 1.25rem;
@@ -171,6 +191,11 @@ html {
   border-radius: 0 0.75rem 0.75rem 0;
   color: #334155;
 }
+.dark .prose-custom blockquote {
+  background: #0c4a6e33;
+  border-left-color: #38bdf8;
+  color: #94a3b8;
+}
 
 .prose-custom blockquote p:last-child {
   margin-bottom: 0;
@@ -190,6 +215,10 @@ html {
   font-size: 0.875em;
   font-family: var(--font-mono), ui-monospace, monospace;
 }
+.dark .prose-custom code {
+  background: #334155;
+  color: #e2e8f0;
+}
 
 .prose-custom pre {
   background: #1e293b;
diff --git a/app/layout.tsx b/app/layout.tsx
index a92151f..2593fad 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -1,6 +1,7 @@
 import type { Metadata } from "next";
 import { Geist, Geist_Mono } from "next/font/google";
 import "./globals.css";
+import { ThemeProvider } from "./context/ThemeContext";
 
 const geistSans = Geist({
   variable: "--font-geist-sans",
@@ -18,17 +19,39 @@ export const metadata: Metadata = {
     "从零开始，7天开启你的数字游民生活。远程工作、地点自由、技能变现 —— 一站式数字游民资源平台。",
 };
 
+function ThemeScript() {
+  return (
+    <script
+      dangerouslySetInnerHTML={{
+        __html: `
+(function() {
+  try {
+    var theme = localStorage.getItem('theme');
+    if (theme === 'dark' || (!theme && window.matchMedia('(prefers-color-scheme: dark)').matches)) {
+      document.documentElement.classList.add('dark');
+    } else {
+      document.documentElement.classList.remove('dark');
+    }
+  } catch (e) {}
+})();
+`,
+      }}
+    />
+  );
+}
+
 export default function RootLayout({
   children,
 }: Readonly<{
   children: React.ReactNode;
 }>) {
   return (
-    <html lang="zh-CN">
+    <html lang="zh-CN" suppressHydrationError>
       <body
         className={`${geistSans.variable} ${geistMono.variable} antialiased`}
       >
-        {children}
+        <ThemeScript />
+        <ThemeProvider>{children}</ThemeProvider>
       </body>
     </html>
   );