feat(css): 添加玻璃态卡片样式

- 新增 `.glass-card` 类，包含背景、边框、阴影和悬停效果
- 在 `about.html` 中为多个卡片元素应用 `.glass-card` 样式
- 提升页面视觉层次和交互体验

about.html

@@ -36,7 +36,7 @@
                 
                 <div class="hero-container">
                     <div class="hero-left">
-                        <div class="profile-card">
+                        <div class="profile-card glass-card">
                             <div class="profile-avatar">
                                 <img src="https://cdn.jsdmirror.com/gh/listener-He/images@default/202309111525908.jpeg" alt="Honesty" class="avatar-image">
                                 <div class="status-indicator"></div>
@@ -70,7 +70,7 @@
                                 </div>
                         </div>
                             <div class="personality-section">
-                                <div class="mbti-card">
+                                <div class="mbti-card glass-card">
                                     <div class="mbti-header">
                                         <img src="https://blog-file.hehouhui.cn/INFJ.png" alt="INFJ" style="width:32px;height:32px;border-radius:50%;border:2px solid rgba(255,255,255,0.4)">
                                         <span class="mbti-tag">INFJ</span>
@@ -131,7 +131,7 @@
                 <div class="personality-timeline">
                     <div class="timeline-item">
                         <div class="timeline-icon">🚴‍♂️</div>
-                        <div class="timeline-content">
+                                    <div class="timeline-content glass-card">
                             <h3>骑行爱好者</h3>
                             <p>享受在路上的自由感，用车轮丈量世界，在风景中寻找灵感</p>
                         </div>

css/about.css

@@ -294,6 +294,22 @@ body {
     background-attachment: fixed;
 }
 
+.glass-card {
+    background: rgba(255, 255, 255, var(--glass-alpha));
+    backdrop-filter: blur(var(--glass-blur));
+    -webkit-backdrop-filter: blur(var(--glass-blur));
+    border: 1px solid var(--glass-border);
+    border-radius: 18px;
+    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
+    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
+}
+
+.glass-card:hover {
+    transform: translateY(-2px);
+    background: rgba(255, 255, 255, calc(var(--glass-alpha) + 0.05));
+    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.16);
+}
+
 .gradient-text {
     color: var(--text-strong);
     background: none;