:root{color-scheme:dark;--bg:#07110f;--panel:#0d1b17;--line:#244137;--text:#edf9f4;--muted:#93b4a8;--accent:#5ef0ad}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 50% -10%,#174531,transparent 45%),var(--bg);font-family:Inter,system-ui,"Microsoft YaHei",sans-serif;color:var(--text)}.app{max-width:620px;margin:auto;padding:22px 16px 36px}header{display:flex;align-items:center;gap:12px;margin-bottom:20px}header .jump{margin-left:auto;flex:none;white-space:nowrap}.mark{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;background:var(--accent);color:#062218;font-weight:900}h1{font-size:22px;margin:0}header p{margin:3px 0;color:var(--muted);font-size:13px}.camera-card{position:relative;background:#020605;border:1px solid var(--line);border-radius:20px;overflow:hidden;aspect-ratio:4/3;display:grid;place-items:center}.camera-card video,.camera-freeze{width:100%;height:100%;object-fit:cover}.camera-freeze{position:absolute;inset:0;pointer-events:none}.camera-hint{position:absolute;inset:0;display:grid;place-content:center;text-align:center;color:#b6d3c7;padding:24px;pointer-events:none;background:linear-gradient(transparent,rgba(0,0,0,.42))}.camera-hint.hidden{display:none}.actions{display:flex;gap:10px;margin:14px 0;flex-wrap:wrap;align-items:center}.fps-switch{display:flex;gap:6px;align-items:center;margin-left:auto}.fps-switch span{color:var(--muted);font-size:12px;font-weight:700}button,.download,.jump{border:1px solid var(--line);background:#132b23;color:var(--text);border-radius:12px;padding:11px 15px;font-weight:750;cursor:pointer;text-decoration:none}.primary,.download{background:var(--accent);color:#062218;border-color:transparent}button:disabled{opacity:.42;cursor:not-allowed}.small{padding:7px 10px;font-size:12px}.card{background:rgba(13,27,23,.92);border:1px solid var(--line);border-radius:16px;padding:14px;margin-top:12px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.stats span{display:block;color:var(--muted);font-size:11px}.stats strong{display:block;margin-top:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.progress{height:9px;margin:12px 0;background:#020605;border-radius:99px;overflow:hidden}.progress i{display:block;width:0;height:100%;background:linear-gradient(90deg,#21b978,var(--accent));transition:width .15s}.row{display:flex;justify-content:space-between;align-items:center}code{display:block;color:#c3e3d6;line-height:1.6;word-break:break-word;margin-top:9px;min-height:24px}.result{display:grid;gap:8px}.result span,.note{color:var(--muted);font-size:13px;line-height:1.65}.note{margin:18px 2px;text-align:center}.sticky-bar{position:sticky;bottom:0;z-index:8;display:flex;gap:10px;padding:10px 0 14px;margin-top:8px;background:var(--bg)}.sticky-bar button{flex:1}@media(max-width:460px){.stats{grid-template-columns:1fr 1fr}.stats div:last-child{grid-column:1/-1}}