perf(fonts): 优化字体加载性能并添加子集化脚本

将 TTF 字体转换为更高效的 WOFF2 格式，添加字体子集化脚本以减小文件大小
优化字体预加载和显示策略，改进无障碍标签

src/app/globals.css

@@ -2,12 +2,12 @@
 
 @font-face {
   font-family: 'Aoyagi Reisho';
-  src: url('/fonts/AoyagiReisho.ttf') format('truetype');
+  src: url('/fonts/AoyagiReisho.woff2') format('woff2'),
+       url('/fonts/AoyagiReisho.ttf') format('truetype');
   font-weight: normal;
   font-style: normal;
-  font-display: block;
+  font-display: swap;
   font-stretch: normal;
-  unicode-range: U+4E00-9FFF, U+3400-4DBF, U+20000-2A6DF, U+2A700-2B73F, U+2B740-2B81F, U+2B820-2CEAF, U+F900-FAFF, U+2F800-2FA1F;
 }
 
 /* 字体加载优化 - 防止 FOUT */
@@ -23,7 +23,7 @@
   --font-sans: var(--font-geist-sans);
   --font-mono: var(--font-geist-mono);
   --font-chinese: var(--font-noto-sans-sc);
-  --font-calligraphy: 'Aoyagi Reisho', var(--font-long-cang), 'Long Cang', var(--font-ma-shan-zheng), 'Ma Shan Zheng', 'ZCOOL XiaoWei', 'STKaiti', 'KaiTi', serif;
+  --font-calligraphy: 'Aoyagi Reisho', 'STKaiti', 'KaiTi', 'ZCOOL XiaoWei', serif;
 }
 
 :root {
@@ -179,6 +179,11 @@
   
   h1 {
     font-size: var(--font-size-5xl);
+    font-family: 'Aoyagi Reisho', 'STKaiti', 'KaiTi', 'ZCOOL XiaoWei', serif;
+    font-weight: normal;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+    text-rendering: optimizeLegibility;
   }
   
   h2 {
@@ -341,7 +346,7 @@
 
   /* 青柳隶书体 - 与 Logo 保持一致 */
   .font-calligraphy {
-    font-family: 'Aoyagi Reisho', var(--font-long-cang), 'Long Cang', var(--font-ma-shan-zheng), 'Ma Shan Zheng', 'ZCOOL XiaoWei', 'STKaiti', 'KaiTi', serif !important;
+    font-family: 'Aoyagi Reisho', 'STKaiti', 'KaiTi', 'ZCOOL XiaoWei', serif !important;
     font-weight: normal;
     -webkit-font-smoothing: antialiased;
     -moz-osx-font-smoothing: grayscale;

src/app/layout.tsx

@@ -130,9 +130,9 @@ export default function RootLayout({
         {/* 字体预加载优化 */}
         <link
           rel="preload"
-          href="/fonts/AoyagiReisho.ttf"
+          href="/fonts/AoyagiReisho.woff2"
           as="font"
-          type="font/ttf"
+          type="font/woff2"
           crossOrigin="anonymous"
         />
         <OrganizationSchema />

src/components/layout/header.tsx

@@ -162,7 +162,6 @@ function HeaderContent() {
             <Link 
               href="/"
               className="flex items-center group"
-              aria-label="返回首页"
             >
               <Image 
                 src="/logo.svg" 
@@ -172,6 +171,7 @@ function HeaderContent() {
                 className="h-8 w-auto transition-transform duration-200 group-hover:scale-105"
                 priority
               />
+              <span className="sr-only">返回首页</span>
             </Link>
 
             <nav className="hidden md:flex items-center gap-1" role="navigation" aria-label="主导航" data-testid="desktop-navigation">