@keyframes spin{to{transform:rotate(360deg)}}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}body,html{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;background:linear-gradient(135deg,#667eea 0,#764ba2 100%);min-height:100%;padding:15px;-webkit-overflow-scrolling:touch}.container{background:#fff;border-radius:16px;box-shadow:0 10px 40px rgba(0,0,0,.2);padding:20px;width:100%;max-width:500px;margin:0 auto}.btn,h1{font-weight:600}h1{color:#333;font-size:16px;position:relative}.btn{width:100%;padding:12px;border:0;border-radius:12px;font-size:14px;cursor:pointer;transition:all .3s;margin-bottom:10px;-webkit-appearance:none;display:flex;align-items:center;justify-content:center;gap:8px}.btn-primary,.btn-secondary{background:linear-gradient(135deg,#667eea 0,#764ba2 100%);color:#fff}.btn-paste:active,.btn-primary:active,.btn-secondary:active{transform:scale(.98);opacity:.9}.toast{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:rgba(0,0,0,.75);color:#fff;padding:12px 24px;border-radius:8px;font-size:14px;z-index:10002;display:none}.footer-info{text-align:center;padding:15px;margin-top:10px}.copyright{margin-bottom:8px;font-size:12px;color:#333}.copyright a{color:#333;text-decoration:none;font-weight:500}.copyright a:hover{color:#000;text-decoration:underline}.spinner{display:inline-block;width:24px;height:24px;border:3px solid #e0e0e0;border-top-color:#667eea;border-radius:50%;animation:spin 1s linear infinite;margin-right:10px;vertical-align:middle}@media (max-width:375px){body{padding:10px}.container{padding:15px}h1{font-size:18px}}.header,.logo-icon{display:flex;align-items:center;justify-content:center}.header{margin-bottom:15px;gap:12px;position:relative}.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,#fe2c55 0,#25f4ee 100%);border-radius:10px;flex-shrink:0}.logo-icon::before{content:"";width:18px;height:18px;background:#fff;border-radius:50%}.tips,textarea{padding:12px;border-radius:12px}.tips{margin-top:20px;margin-bottom:15px;background:#f0f7ff;font-size:12px;color:#666}.tips h3{color:#333;font-size:13px}.tips ol{padding-left:18px}.tips li{margin-bottom:4px;line-height:1.6}.disclaimer{margin-top:10px;padding-top:8px;border-top:1px dashed #ccc;color:#999;font-size:12px;text-align:center;font-weight:700}.input-group,.tips h3{margin-bottom:8px}textarea{width:100%;height:100px;border:2px solid #e8e8e8;font-size:14px;resize:none;transition:border-color .3s;background:#fafafa;-webkit-appearance:none}textarea:focus{outline:0;border-color:#667eea;background:#fff}textarea::placeholder{color:#999}.btn-paste{background:linear-gradient(135deg,#4facfe 0,#00f2fe 100%);color:#fff}.btn-spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin 1s linear infinite;display:none}.button-group{display:flex;gap:10px;margin-bottom:10px}.button-group .btn{flex:1;margin-bottom:0}.btn-watermark{background:linear-gradient(135deg,#f093fb 0,#f5576c 100%);color:#fff;display:none}.btn-download:active,.btn-watermark:active{transform:scale(.98);opacity:.9}.btn-download{background:linear-gradient(135deg,#11998e 0,#38ef7d 100%);color:#fff;display:none}.btn-copy{background:linear-gradient(135deg,#667eea 0,#764ba2 100%);color:#fff;display:none}.download-buttons{display:none;flex-wrap:nowrap;gap:6px}.download-buttons .btn{white-space:nowrap;padding:10px 8px;font-size:13px;flex:1;min-width:0}.wechat-guide{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.85);z-index:2000;display:none}.wechat-guide-content{position:absolute;top:20px;right:20px;background:#fff;padding:20px;border-radius:12px;text-align:center;color:#333}.wechat-guide-arrow{font-size:40px;color:#fff;position:absolute;top:-50px;right:20px}.wechat-guide-content p{margin-bottom:8px;font-size:14px}.wechat-guide-close{margin-top:15px;padding:10px 30px;background:#07c160;color:#fff;border:0;border-radius:8px;font-size:14px;cursor:pointer}.result{margin-top:20px;display:none}.video-info,.video-preview{border-radius:12px;margin-bottom:15px}.video-info{padding:12px;background:#f0f7ff;font-size:12px;color:#666}.video-info strong{color:#333;font-size:13px}.video-preview{width:100%;aspect-ratio:9/16;max-height:500px;background:#000;object-fit:contain}.loading{text-align:center;padding:20px;display:none}.error,.loading-text{color:#666;font-size:14px}.error{background:#fff2f0;color:#ff4d4f;padding:12px;border-radius:12px;border:1px solid #ffccc7;white-space:pre-line}.error-wrapper{margin-top:15px;display:flex;flex-direction:column;gap:8px}.btn-copy-error{padding:6px 12px;font-size:12px;font-weight:600;border:1px solid #ffccc7;border-radius:8px;background:#fff;color:#ff4d4f;cursor:pointer;align-self:flex-start}.btn-copy-error:active{transform:scale(.98);opacity:.9}@media (max-width:375px){textarea{height:80px}.button-group{flex-direction:column}}.version-switcher{position:absolute;left:100%;top:50%;transform:translateY(-50%);margin-left:8px;display:none;flex-direction:column;gap:2px}.version-buttons{display:flex;gap:2px}.version-btn{font-weight:500;flex-shrink:0}.version-btn.active{border-color:#667eea;background:linear-gradient(135deg,#667eea 0,#764ba2 100%);color:#fff}.version-btn.simulate-active{border-color:#ff6b6b;background:linear-gradient(135deg,#ff6b6b 0,#ee5a24 100%);color:#fff}.version-btn:hover{border-color:#667eea}.debug-checkbox,.version-btn{padding:1px 4px;border:1px solid #e8e8e8;border-radius:2px;background:#fff;font-size:9px;color:#666;cursor:pointer;white-space:nowrap;transition:all .3s}.debug-checkbox input{width:9px;height:9px;cursor:pointer}.debug-checkbox,.debug-checkboxes{display:flex;gap:2px;align-items:center}.version-info-container{margin-top:8px}.version-info{white-space:nowrap;font-size:11px;color:#666}.url-box{display:flex;flex-direction:column;gap:4px}.url-box span{color:#666;font-size:12px}.url-display{word-break:break-all;font-size:11px;color:#333;line-height:1.5;background:#fff;padding:8px;border-radius:4px;border:1px solid #e8e8e8}.btn-copy:hover{background:#5a6fd6}.image-download-buttons{display:none;flex-wrap:nowrap;gap:6px}.image-download-buttons .btn{white-space:nowrap;padding:10px 8px;font-size:13px;flex:1;min-width:0}.btn-download-images{background:linear-gradient(135deg,#f093fb 0,#f5576c 100%);color:#fff}.btn-download-all-images:active,.btn-download-images:active{transform:scale(.98);opacity:.9}.btn-download-all-images{background:linear-gradient(135deg,#11998e 0,#38ef7d 100%);color:#fff}