:root{--primary:#0f766e;--primary-strong:#115e59;--primary-soft:#ccfbf1;--ink-strong:#0f172a;--ink-body:#334155;--ink-muted:#64748b;--line:#0f172a14;--line-strong:#0f172a24}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{color:var(--ink-strong);-webkit-font-smoothing:antialiased;background:linear-gradient(#f0fdfa 0%,#f8fafc 40%,#fff 100%);min-height:100vh;font-family:Avenir Next,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif}a{color:inherit;text-decoration:none}input,button,select,textarea{font:inherit}.tool-page{max-width:900px}.tool-form{flex-direction:column;gap:16px;display:flex}.tool-preview{overflow-x:auto}.watermark-ref{position:relative}.watermark-ref:before{content:"参考模板 REFERENCE ONLY";color:#0000000a;pointer-events:none;white-space:nowrap;z-index:0;font-size:48pt;font-weight:900;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)rotate(-30deg)}