body{margin:0;background:#10141a;color:#f2f4f7;font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}.page{max-width:480px;margin:0 auto;min-height:100vh;padding:16px}.stage{background:#000;border-radius:10px;overflow:hidden;aspect-ratio:16 / 9}.stage iframe{width:100%;height:100%;border:0;background:#000}.stage.embed{height:70vh;aspect-ratio:auto}a{color:#9ec1ff}video{width:100%;height:100%;object-fit:contain;background:#000;display:block}button,input{font:inherit}input{width:100%;box-sizing:border-box;border:0;border-radius:8px;padding:10px 12px;margin:8px 0 12px}button{border:0;border-radius:8px;background:#1677ff;color:#fff;padding:10px 14px}.protocols{display:flex;gap:8px;margin-top:12px}.protocols button{background:#243044}.protocols button.active{background:#1677ff}.muted{color:#b7c0cc}.error{color:#ffb4a8}.center{padding:48px 0;text-align:center}