调整为8张图片，使用object-fit: contain确保完整展示，白底填充

index.html

@@ -173,18 +173,6 @@
                         <p>在此处插入说明文字...</p>
                     </div>
                 </div>
-                
-                <!-- 图片9 -->
-                <div class="card">
-                    <div class="card-image analysis-img">
-                        <img src="images/analysis-09.jpg" alt="分析图9" onerror="this.style.display='none'; this.nextElementSibling.style.display='flex';">
-                        <div class="placeholder-text" style="display:none;">分析图9</div>
-                    </div>
-                    <div class="card-content">
-                        <h3>标题9</h3>
-                        <p>在此处插入说明文字...</p>
-                    </div>
-                </div>
             </div>
         </div>
     </section>