:root{--primary-color: #4a90e2;--secondary-color: #f5f5f5;--border-color: #ddd;--text-color: #333;--font-handwrite: "Homemade Apple", cursive;--font-chinese: "Ma Shan Zheng", cursive;--font-casual: "Shadows Into Light", cursive;--font-scribble: "Gloria Hallelujah", cursive}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;line-height:1.6;color:var(--text-color);background-color:#fff}.container{max-width:1200px;margin:0 auto;padding:2rem}h1,h2{margin-bottom:1.5rem;color:var(--primary-color)}.upload-section{margin-bottom:2rem}.upload-label{display:inline-block;padding:1rem 2rem;background-color:var(--primary-color);color:#fff;border-radius:4px;cursor:pointer;transition:background-color .3s}.upload-label:hover{background-color:#357abd}.upload-label:after{content:"(支持图片和PDF，最大10MB)";font-size:.8em;margin-left:.5em;opacity:.8}input[type=file]{display:none}.canvas-container{border:1px solid var(--border-color);margin-bottom:1rem;background-color:#fff}.canvas-container:before{content:"在此处手写签名";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:#999;pointer-events:none;opacity:0;transition:opacity .3s}.canvas-container:empty:before{opacity:1}.controls{display:flex;gap:1rem;margin-bottom:2rem;align-items:center}.brush-settings{display:flex;gap:1rem;align-items:center}.btn{padding:.5rem 1rem;border:1px solid var(--border-color);border-radius:4px;background-color:#fff;cursor:pointer;transition:all .3s}.btn:hover{background-color:var(--secondary-color)}.btn.primary{background-color:var(--primary-color);color:#fff;border:none}.btn.primary:hover{background-color:#357abd}.preview-section{position:relative;margin:2rem 0;min-height:200px;border:1px dashed var(--border-color);padding:1rem;overflow:hidden}#signatureCanvas{border:1px solid var(--border-color);cursor:crosshair}.loading{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:#000c;color:#fff;padding:1rem 2rem;border-radius:4px;z-index:1000}.loading:after{content:"";display:inline-block;width:1em;height:1em;border:2px solid #fff;border-radius:50%;border-top-color:transparent;animation:spin 1s linear infinite;margin-left:.5em}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 768px){.container{padding:1rem}.controls{flex-direction:column}.brush-settings{flex-direction:column;width:100%}.brush-settings label{width:100%;display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}input[type=range]{width:60%}.preview-section{margin:1rem 0}}.tips{background-color:var(--secondary-color);padding:1rem;border-radius:4px;margin-bottom:2rem}.tips h3{color:var(--primary-color);margin-bottom:.5rem}.tips ol{padding-left:1.5rem}.tips li{margin-bottom:.5rem}.signature-type-switch{margin-bottom:1rem;display:flex;gap:1rem}.mode-btn{flex:1;padding:.8rem;border:1px solid var(--border-color);background:#fff;cursor:pointer;transition:all .3s}.mode-btn.active{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.signature-text-input{width:100%;padding:1rem;font-size:1.2rem;border:1px solid var(--border-color);border-radius:4px;margin-bottom:1rem}.text-controls{display:flex;gap:1rem;margin-bottom:1rem;flex-wrap:wrap}.text-preview{min-height:100px;border:1px dashed var(--border-color);display:flex;align-items:center;justify-content:center;padding:1rem;margin-top:1rem;transform:rotate(-5deg);text-shadow:1px 1px 1px rgba(0,0,0,.1);font-family:var(--current-font),cursive}.font-select{padding:.5rem;border:1px solid var(--border-color);border-radius:4px;background:#fff}.text-preview[style*="Homemade Apple"]{font-family:Homemade Apple,cursive!important;transform:rotate(-4deg);letter-spacing:2px}.text-preview[style*="Liu Jian Mao Cao"]{font-family:Liu Jian Mao Cao,cursive!important;transform:rotate(-5deg)}.text-preview[style*="Shadows Into Light"]{transform:rotate(-3deg);letter-spacing:1.5px}.text-preview[style*=Kalam]{transform:rotate(-2deg);letter-spacing:1px}.text-preview[style*="Gloria Hallelujah"]{transform:rotate(-1deg);letter-spacing:2px}.preview-container{position:relative;min-height:200px;width:100%;overflow:hidden}.signature-preview{position:absolute;cursor:move;-webkit-user-select:none;user-select:none;z-index:100;background:#ffffff80;border:2px dashed #666;padding:10px;display:none;min-width:100px;min-height:50px}.signature-preview.dragging{opacity:.7;background:#fffc}.signature-preview img{max-width:200px;pointer-events:none}