feat(web): 新增 Landing 页面与 UI 优化\n\n- 新增 LandingPage、CryptoFeatureCard 等组件\n- 登录/注册页面与样式优化\n- 静态资源 images/main.png

web/src/components/CryptoFeatureCard.tsx

@@ -0,0 +1,119 @@
+import * as React from "react";
+import { motion } from "framer-motion";
+import { Check } from "lucide-react";
+import { cn } from "../lib/utils";
+
+interface CryptoFeatureCardProps {
+  icon: React.ReactNode;
+  title: string;
+  description: string;
+  features: string[];
+  className?: string;
+  delay?: number;
+}
+
+export const CryptoFeatureCard = React.forwardRef<HTMLDivElement, CryptoFeatureCardProps>(
+  ({ icon, title, description, features, className, delay = 0 }, ref) => {
+    const [isHovered, setIsHovered] = React.useState(false);
+
+    return (
+      <motion.div
+        ref={ref}
+        initial={{ opacity: 0, y: 20 }}
+        whileInView={{ opacity: 1, y: 0 }}
+        viewport={{ once: true }}
+        transition={{ duration: 0.5, delay }}
+        onHoverStart={() => setIsHovered(true)}
+        onHoverEnd={() => setIsHovered(false)}
+        className="relative h-full"
+      >
+        <div
+          className={cn(
+            "relative h-full overflow-hidden border-2 transition-all duration-300 rounded-xl",
+            "bg-gradient-to-br from-[#0C0E12] to-[#1E2329]",
+            "border-[#2B3139] hover:border-[#F0B90B]/50",
+            isHovered && "shadow-[0_0_20px_rgba(240,185,11,0.2)]",
+            className
+          )}
+        >
+          {/* Animated glow border effect */}
+          <motion.div
+            className="absolute inset-0 opacity-0 pointer-events-none"
+            animate={{
+              opacity: isHovered ? 1 : 0,
+            }}
+            transition={{ duration: 0.3 }}
+          >
+            <div className="absolute inset-0 bg-gradient-to-r from-transparent via-[#F0B90B]/20 to-transparent animate-[shimmer_2s_infinite]" />
+          </motion.div>
+
+          {/* Background pattern */}
+          <div className="absolute inset-0 opacity-5">
+            <div
+              className="absolute inset-0"
+              style={{
+                backgroundImage: `radial-gradient(circle at 2px 2px, #F0B90B 1px, transparent 0)`,
+                backgroundSize: "32px 32px",
+              }}
+            />
+          </div>
+
+          <div className="relative z-10 p-8 flex flex-col h-full">
+            {/* Icon container */}
+            <motion.div
+              className={cn(
+                "mb-6 inline-flex items-center justify-center w-16 h-16 rounded-xl",
+                "bg-gradient-to-br from-[#F0B90B]/20 to-[#F0B90B]/5",
+                "border border-[#F0B90B]/30"
+              )}
+              animate={{
+                scale: isHovered ? 1.1 : 1,
+                boxShadow: isHovered
+                  ? "0 0 20px rgba(240, 185, 11, 0.4)"
+                  : "0 0 0px rgba(240, 185, 11, 0)",
+              }}
+              transition={{ duration: 0.3 }}
+            >
+              <div className="text-[#F0B90B]">{icon}</div>
+            </motion.div>
+
+            {/* Title */}
+            <h3 className="text-2xl font-bold text-[#EAECEF] mb-3">{title}</h3>
+
+            {/* Description */}
+            <p className="text-[#848E9C] mb-6 flex-grow leading-relaxed">{description}</p>
+
+            {/* Features list */}
+            <div className="space-y-3 mb-6">
+              {features.map((feature, index) => (
+                <motion.div
+                  key={index}
+                  initial={{ opacity: 0, x: -10 }}
+                  whileInView={{ opacity: 1, x: 0 }}
+                  viewport={{ once: true }}
+                  transition={{ delay: delay + index * 0.1 }}
+                  className="flex items-start gap-3"
+                >
+                  <div className="mt-0.5 flex-shrink-0">
+                    <div className="w-5 h-5 rounded-full bg-[#F0B90B]/20 flex items-center justify-center">
+                      <Check className="w-3 h-3 text-[#F0B90B]" />
+                    </div>
+                  </div>
+                  <span className="text-sm text-[#EAECEF]">{feature}</span>
+                </motion.div>
+              ))}
+            </div>
+
+          </div>
+
+          {/* Corner accent */}
+          <div className="absolute bottom-0 right-0 w-32 h-32 opacity-10">
+            <div className="absolute inset-0 bg-gradient-to-tl from-[#F0B90B] to-transparent" />
+          </div>
+        </div>
+      </motion.div>
+    );
+  }
+);
+
+CryptoFeatureCard.displayName = "CryptoFeatureCard";

web/src/components/LoginPage.tsx

@@ -3,6 +3,7 @@ import { useAuth } from '../contexts/AuthContext';
 import { useLanguage } from '../contexts/LanguageContext';
 import { t } from '../i18n/translations';
 import { Header } from './Header';
+import { ArrowLeft } from 'lucide-react';
 
 export function LoginPage() {
   const { language } = useLanguage();
@@ -52,9 +53,22 @@ export function LoginPage() {
   return (
     <div className="min-h-screen" style={{ background: '#0B0E11' }}>
       <Header simple />
-      
+
       <div className="flex items-center justify-center" style={{ minHeight: 'calc(100vh - 80px)' }}>
         <div className="w-full max-w-md">
+          {/* Back to Home */}
+          <button
+            onClick={() => {
+              window.history.pushState({}, '', '/');
+              window.dispatchEvent(new PopStateEvent('popstate'));
+            }}
+            className="flex items-center gap-2 mb-6 text-sm hover:text-[#F0B90B] transition-colors"
+            style={{ color: '#848E9C' }}
+          >
+            <ArrowLeft className="w-4 h-4" />
+            返回首页
+          </button>
+
           {/* Logo */}
           <div className="text-center mb-8">
             <div className="w-16 h-16 mx-auto mb-4 flex items-center justify-center">
@@ -191,4 +205,4 @@ export function LoginPage() {
       </div>
     </div>
   );
-}
+}

web/src/components/RegisterPage.tsx

@@ -2,6 +2,7 @@ import React, { useState } from 'react';
 import { useAuth } from '../contexts/AuthContext';
 import { useLanguage } from '../contexts/LanguageContext';
 import { t } from '../i18n/translations';
+import { ArrowLeft } from 'lucide-react';
 
 export function RegisterPage() {
   const { language } = useLanguage();
@@ -73,6 +74,21 @@ export function RegisterPage() {
   return (
     <div className="min-h-screen flex items-center justify-center" style={{ background: '#0B0E11' }}>
       <div className="w-full max-w-md">
+        {/* Back to Home */}
+        {step === 'register' && (
+          <button
+            onClick={() => {
+              window.history.pushState({}, '', '/');
+              window.dispatchEvent(new PopStateEvent('popstate'));
+            }}
+            className="flex items-center gap-2 mb-6 text-sm hover:text-[#F0B90B] transition-colors"
+            style={{ color: '#848E9C' }}
+          >
+            <ArrowLeft className="w-4 h-4" />
+            返回首页
+          </button>
+        )}
+
         {/* Logo */}
         <div className="text-center mb-8">
           <div className="w-16 h-16 mx-auto mb-4 flex items-center justify-center">
@@ -307,4 +323,4 @@ export function RegisterPage() {
       </div>
     </div>
   );
-}
+}