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>