feat(landing): rename CTEM to Collider, reorder sections

- CTEM → Collider（对撞机），与 ChainReactor 同属核物理语系
- 开源矩阵移至路线图之上（第二版面）
- Hero 加入 Infra 面向 Real World AI 渗透框架的核心定位
- 删除竞赛成绩区，补全 picker/templates/urlfounder 三个项目
- section 编号重排 001-004

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: M09Ic

docs/landing.html

@@ -1178,10 +1178,10 @@ <h2 class="sec-title">核心产品</h2>
     <div class="products rv">
       <div class="prod feat">
         <div class="prod-top">
-          <span class="prod-cat">CTEM · Pre-Exploit</span>
+          <span class="prod-cat">Collider · Pre-Exploit</span>
           <span class="prod-level">L2</span>
         </div>
-        <h3 class="prod-name">CTEM</h3>
+        <h3 class="prod-name">Collider</h3>
         <div class="prod-subtitle">持续暴露面管理</div>
         <p class="prod-desc">攻击面管理平台。gogo / spray / zombie / neutron 组成统一工具链，结构化输出供 Agent 消费。</p>
         <div class="prod-stack">gogo / spray / zombie / neutron</div>