init: 初始化 AssetX 项目仓库

包含 webapp（Next.js 用户端）、webapp-back（Go 后端）、
antdesign（管理后台）、landingpage（营销落地页）、
数据库 SQL 和配置文件。

landingpage/components/HeroSection.tsx

@@ -0,0 +1,71 @@
+'use client';
+
+import { motion } from 'framer-motion';
+import HeroTitle from './HeroTitle';
+import HeroButtons from './HeroButtons';
+import { useLanguage } from '@/contexts/LanguageContext';
+
+export default function HeroSection() {
+  const { t } = useLanguage();
+
+  // StatsSection 桌面端高度约 182px
+  const statsHeight = 182;
+
+  return (
+    <section
+      className="relative w-full min-h-[calc(100vh-var(--navbar-height,72px))] md:min-h-[calc(100vh-var(--navbar-height,72px)-182px)]"
+      style={{ overflow: 'hidden' }}
+    >
+      {/* Video background */}
+      <video
+        autoPlay
+        loop
+        muted
+        playsInline
+        className="absolute inset-0 w-full h-full object-cover"
+        style={{
+          zIndex: 0,
+          objectFit: 'cover',
+          objectPosition: 'center center',
+          minWidth: '100%',
+          minHeight: '100%',
+          transform: 'scale(1.3)'
+        }}
+      >
+        <source src="https://pub-0b813d5d97b84a06a71fd3d4283fce59.r2.dev/hero-background.mp4" type="video/mp4" />
+      </video>
+
+      <div
+        className="relative flex flex-col items-start justify-center min-h-[calc(100vh-var(--navbar-height,72px))] md:min-h-[calc(100vh-var(--navbar-height,72px)-182px)] px-6 py-20 md:px-[85px] md:py-16"
+        style={{
+          background: 'linear-gradient(to left, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.55))',
+          zIndex: 1
+        }}
+      >
+        <div className="flex flex-col gap-12 md:gap-[88px] w-full max-w-[926px] 2xl:max-w-[1200px] 3xl:max-w-[1500px]">
+          <div className="flex flex-col gap-5">
+            <HeroTitle />
+            <motion.p
+              className="text-base sm:text-xl max-w-[640px] 2xl:max-w-[800px] 3xl:max-w-[1000px]"
+              style={{
+                color: 'rgba(255,255,255,0.65)',
+                fontFamily: 'Inter, sans-serif',
+                lineHeight: '1.625',
+                fontWeight: 400,
+                minHeight: 'calc(3 * 1.625em)',
+              }}
+              initial={{ opacity: 0, y: 16, filter: 'blur(8px)' }}
+              whileInView={{ opacity: 1, y: 0, filter: 'blur(0px)' }}
+              viewport={{ once: true }}
+              transition={{ duration: 0.9, ease: 'easeOut', delay: 0.75 }}
+            >
+              {t('hero.description')}
+            </motion.p>
+          </div>
+
+          <HeroButtons />
+        </div>
+      </div>
+    </section>
+  );
+}