*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:#f5f6f8;color:#222}
body.dark-theme{background:#181a1f;color:#ddd}
.cover{position:relative;background-size:cover;background-position:center;background-color:#3b7cff;color:#fff;padding:40px 20px;min-height:150px}
.cover::after{content:'';position:absolute;inset:0;background:linear-gradient(rgba(0,0,0,.15),rgba(0,0,0,.4))}
.cover-info{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;max-width:800px;margin:0 auto}
.cover .name{font-size:22px;font-weight:600}
.cover .sub{margin-top:6px;opacity:.85;font-size:13px}
.cover-avatar{width:56px;height:56px;border-radius:50%;background-size:cover;background-position:center;border:2px solid #fff}
.search-form{max-width:800px;margin:16px auto;display:flex;gap:8px;padding:0 16px}
.search-form input{flex:1;padding:10px 14px;border:1px solid #ddd;border-radius:20px;outline:none;background:#fff}
body.dark-theme .search-form input{background:#25282f;border-color:#333;color:#eee}
.search-form button{padding:10px 20px;border:0;border-radius:20px;background:#3b7cff;color:#fff;cursor:pointer}
.timeline{max-width:800px;margin:0 auto;padding:0 12px 40px}
.moment{display:flex;gap:12px;background:#fff;border-radius:10px;padding:14px;margin-bottom:12px;box-shadow:0 1px 3px rgba(0,0,0,.05)}
body.dark-theme .moment{background:#25282f;box-shadow:none}
.moment-avatar{flex:0 0 44px;width:44px;height:44px;border-radius:50%;background-size:cover;background-position:center}
.moment-main{flex:1;min-width:0}
.moment-text{font-size:14px;line-height:1.6;word-break:break-word;white-space:normal}
.moment-text.collapsed{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.moment-text-toggle{display:none;font-size:12px;color:#3b7cff;cursor:pointer;margin-top:4px}
.moment-text-toggle.show{display:inline-block}
.moment-imgs{margin-top:10px;display:grid;gap:4px}
.moment-imgs.count-1{grid-template-columns:1fr;max-width:70%}
.moment-imgs.count-2,.moment-imgs.count-4{grid-template-columns:repeat(2,1fr)}
.moment-imgs.count-3,.moment-imgs.count-5,.moment-imgs.count-6,.moment-imgs.count-7,.moment-imgs.count-8,.moment-imgs.count-9{grid-template-columns:repeat(3,1fr)}
.grid-cell{display:block;position:relative;padding-top:100%;overflow:hidden;border-radius:6px;background:#f0f0f0}
.grid-cell img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.moment-foot{margin-top:10px;display:flex;justify-content:space-between;font-size:12px;color:#999}
.moment-foot a{color:#3b7cff;text-decoration:none}
.footer-loader{text-align:center;padding:20px;color:#999;font-size:13px}
.float-tools{position:fixed;right:16px;bottom:20px;display:flex;flex-direction:column;gap:8px}
.float-tools button{width:40px;height:40px;border-radius:50%;border:0;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.15);cursor:pointer;font-size:18px}
body.dark-theme .float-tools button{background:#25282f;color:#ddd}