:root{--bg:#fcfbf8;--ink:#3a3730;--muted:#a39d90;--accent:#e8833a;--green:#3e9b4f;--red:#e24b36;--line:#eceae3}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0}body{background:var(--bg);color:var(--ink);flex-direction:column;min-height:100vh;font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,Noto Sans SC,system-ui,sans-serif;display:flex}.topbar{border-bottom:1px solid var(--line);background:#fff;justify-content:space-between;align-items:center;height:52px;padding:0 20px;display:flex}.brand{letter-spacing:2px;align-items:center;gap:10px;font-weight:700;display:flex}.brand .logo{object-fit:cover;border-radius:50%;width:26px;height:26px;display:block}.brand em{color:var(--muted);letter-spacing:1px;font-size:12px;font-style:normal;font-weight:400}.iconbtn{width:32px;height:32px;color:var(--ink);cursor:pointer;background:0 0;border:none;border-radius:50%;font-size:16px;transition:all 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(width<=560px){.hud{flex-wrap:wrap}.word-box{order:-1;width:100%}.score-box,.time-box{flex:1}.topbar{padding:0 12px}.brand em{display:none}}