这是诊断：

洛谷网络连接诊断工具
基本信息
系统时间: Sun Oct 13 2024 16:05:22 GMT+0800 (中国标准时间)
浏览器: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 Edg/125.0.0.0
语言: zh-CN | zh-CN,en,en-GB,en-US
JavaScript: true
Cookie: true
LocalStorage: true
IndexedDB: true
网络状态
连接信息
IPv6: null 
IPv4: 183.225.21.141  中国–云南–昆明 移动
访问质量
cdn.luogu.com.cn: OK 376ms CDN(aliyun; id=2493171c17288067049044765e; via=cache7.l2cn3084[232,232,304-0,H], cache34.l2cn3084[234,0], cache34.l2cn3084[234,0], kunlun4.cn7632[265,266,200-0,H], kunlun8.cn7632[267,0])

fecdn.luogu.com.cn: OK 440ms CDN(aliyun; id=2782a62917288067060781770e; via=cache56.l2cn3166[200,199,200-0,M], cache41.l2cn3166[201,0], cache7.cn7688[391,391,200-0,M], cache21.cn7688[394,0])

www.luogu.com.cn: OK 239ms CDN(wangsu; id=670b7f33_PS-CKG-01Vqj28_20119-48334; via=1.1 PS-CKG-01SsH29:8 (Cdn Cache Server V2.0)) LuoguWeb(CNHAZb.web-003:luogu-web; cdn=Wangsu; ip=183.225.21.141; time=2024-10-13T16:05:07+08:00)

class.luogu.com.cn: OK 148ms CDN(wangsu; id=670b7f34_PS-CKG-01SsH29_12612-13955; via=1.1 PS-CKG-01SsH29:8 (Cdn Cache Server V2.0)) LuoguWeb(CNHAZb.web-001:yugu; cdn=Wangsu; ip=183.225.21.141; time=2024-10-13T16:05:08+08:00)

ti.luogu.com.cn: OK 133ms CDN(aliyun; id=2493171917288067097877905e; via=ens-cache28.l2em21-5[29,0], kunlun5.cn7632[73,0]) LuoguWeb(CNHAZb.web-003:youti; cdn=Aliyun; ip=183.225.21.141; time=2024-10-13T16:05:09+08:00)

www.luogu.com: TIMEOUT 30778ms CDN(unknown)

结论：国际站疑似被移动私自墙了？