Update README.md

README.md

@@ -47,7 +47,10 @@ dataset_info:
 
 ## Key Features / 核心特点
 
-- **Optical ground truth** – sub-mm accuracy, 120 fps, no estimation errors.<sub>**光学真值** – 亚毫米精度，120 fps，无累计误差。</sub>
+<p style="margin: 0 0 0.3em 0; line-height: 1.3;">
+- **Optical ground truth** – sub-mm accuracy, 120 fps, no estimation errors.<br>
+<small>**光学真值** – 亚毫米精度，120 fps，无累计误差。</small>
+</p>
 - **Dexterous hands** – 20+ DoF per hand, synchronized with object 6DOP pose.  
   <small>**灵巧手数据** – 每只手 20+ 自由度，与物体 6 DOP 同步。</small>
 - **Robot-ready** – pre-retargeted to Unitree G1; custom retargeting available.