:root{--bg:#f5f7fb;--ink:#172239;--muted:#758097;--line:#e2e8f1;--accent:#386bf3}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.6 "Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif}button,input,textarea,select{font:inherit}button,select{cursor:pointer}header{background:white;border-bottom:1px solid var(--line)}.head{max-width:1120px;margin:auto;padding:27px 24px;display:flex;justify-content:space-between;align-items:center}.brand{font-size:22px;font-weight:750;letter-spacing:1px}.brand span{display:inline-grid;place-items:center;background:var(--accent);color:white;border-radius:12px;width:42px;height:42px;margin-right:12px;font-size:21px}.badge{background:#edf7f0;color:#43815b;border-radius:30px;padding:7px 13px;font-size:12px}main{max-width:1120px;margin:34px auto;padding:0 24px}.intro h1{font-size:28px;margin:0 0 6px}.intro p{color:var(--muted);margin:0}.tabs{display:flex;gap:8px;margin:25px 0 20px;flex-wrap:wrap}.tab{background:transparent;border:1px solid transparent;padding:10px 20px;color:#69768e;border-radius:10px}.tab.active{background:var(--ink);color:white}.panel{display:none}.panel.active{display:block}.card{background:white;border:1px solid var(--line);border-radius:18px;padding:26px;box-shadow:0 6px 25px #283b6010}.title{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:20px}.title h2{font-size:19px;margin:0}.sub{font-size:12px;color:var(--muted)}.columns{display:grid;grid-template-columns:1fr 1fr;gap:22px}label.label{display:block;margin-bottom:9px;font-weight:600}.editor{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fafbfd}.editor textarea{display:block;width:100%;height:270px;border:0;resize:vertical;padding:16px;background:transparent;color:var(--ink);outline:none;line-height:1.7;font:14px/1.7 Consolas,"Microsoft YaHei",monospace}.editor:focus-within{border-color:#7798fa;box-shadow:0 0 0 3px #386bf311}.editor footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:7px 13px;color:var(--muted);font-size:12px}.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:20px}button.btn{border:1px solid var(--line);background:white;border-radius:9px;padding:9px 16px;color:var(--ink)}button.btn:hover{background:#f0f4fc}button.primary{background:var(--accent);border-color:var(--accent);color:white}button.primary:hover{background:#2859d9}button:disabled{opacity:.45;cursor:not-allowed}.options{display:flex;gap:18px;flex-wrap:wrap;margin-top:16px;color:#66728a}.options label{cursor:pointer}input[type=checkbox]{accent-color:var(--accent)}select{border:1px solid var(--line);border-radius:7px;background:white;padding:5px 8px;color:var(--ink)}.note{margin-top:18px;font-size:12px;color:var(--muted)}.drop{position:relative;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;min-height:215px;border:1.5px dashed #c9d4e9;background:#fafcff;border-radius:13px;cursor:pointer;padding:24px;transition:.2s}.drop:hover,.drop.over{background:#edf3ff;border-color:var(--accent)}.drop strong{font-size:16px;margin:8px 0}.drop input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}.upload-icon{font-size:30px;color:var(--accent)}.preview{display:none;margin-top:18px;border:1px solid var(--line);border-radius:12px;padding:16px;gap:18px;align-items:center;overflow:hidden}.preview img{max-width:130px;max-height:130px;object-fit:contain;background:repeating-conic-gradient(#e6e9ef 0% 25%,#fff 0% 50%) 50%/16px 16px;border-radius:6px}.preview .meta{min-width:0;word-break:break-all}.sizes{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin:20px 0}.size{border:1px solid var(--line);border-radius:11px;padding:13px;text-align:center;background:#fafbfd;cursor:pointer}.size:has(input:checked){border-color:#87a5ff;background:#f0f5ff;color:#2859d9}.size strong{display:block;font-size:18px}.size input{margin-right:5px}.icon-grid{display:flex;gap:15px;flex-wrap:wrap;margin-top:20px}.icon-item{border:1px solid var(--line);border-radius:10px;padding:14px;min-width:115px;text-align:center}.icon-item canvas{display:block;max-width:96px;max-height:96px;margin:0 auto 9px;background:repeating-conic-gradient(#e6e9ef 0% 25%,#fff 0% 50%) 50%/12px 12px}.icon-item button{font-size:12px!important;padding:5px 10px!important}.bottom{text-align:center;color:#8e98aa;font-size:12px;margin:24px 0}.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);background:#172239;color:white;border-radius:10px;padding:12px 20px;box-shadow:0 6px 30px #0002;z-index:10;max-width:90%;display:none}.status{color:#ad4e2c;margin-top:12px;min-height:22px;overflow-wrap:anywhere}.status:empty{display:none}@media(max-width:700px){.head{padding:20px}.badge{display:none}main{margin:22px auto;padding:0 15px}.intro h1{font-size:23px}.card{padding:18px}.columns{grid-template-columns:1fr}.sizes{grid-template-columns:repeat(3,1fr)}.tab{padding:9px 12px}.title{align-items:flex-start;flex-direction:column;gap:5px}.editor textarea{height:200px}}
.qr-preview{min-height:302px;display:flex;align-items:center;justify-content:center;padding:20px;border:1px solid var(--line);border-radius:12px;background:#fafbfd}.qr-preview canvas{max-width:100%;height:auto;width:280px;background:white;image-rendering:pixelated}#qr-meta{margin-top:8px;min-height:20px}
[hidden]{display:none!important}
.mode-switch{display:flex;gap:8px;margin-bottom:22px}.mode-switch .active{background:var(--ink);border-color:var(--ink);color:white}.mode-switch .active:hover{background:#26364f}.scan-drop:focus-within{outline:2px solid var(--accent);outline-offset:3px}.scan-preview{margin-top:16px;text-align:center}.scan-preview img{max-width:100%;max-height:230px;object-fit:contain;border:1px solid var(--line);border-radius:10px}.scan-preview .sub{overflow-wrap:anywhere;margin-top:6px}
.mobile-tool-picker{display:none}.tab:focus-visible{outline:2px solid var(--accent);outline-offset:-3px}
@media(max-width:700px){.tool-nav{margin:22px 0 20px}.tool-nav .tabs{display:none}.mobile-tool-picker{display:block}.mobile-tool-picker label{display:flex;justify-content:space-between;align-items:center;margin:0 3px 8px;font-size:12px;font-weight:600;color:#66748c}.mobile-tool-picker label::after{content:"点击切换工具";font-size:11px;font-weight:400;color:var(--muted)}.tool-picker-control{position:relative}.tool-picker-icon{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:36px;height:36px;display:grid;place-items:center;border-radius:11px;background:#eaf0ff;color:var(--accent);pointer-events:none}.tool-picker-icon svg{width:19px;height:19px}.tool-picker-arrow{position:absolute;right:14px;top:50%;transform:translateY(-50%);width:28px;height:28px;border-radius:9px;background:#f0f4fb;display:grid;place-items:center;pointer-events:none}.tool-picker-arrow::before{content:"";width:7px;height:7px;border-right:1.8px solid #7587a7;border-bottom:1.8px solid #7587a7;transform:translateY(-2px) rotate(45deg)}#tool-select{appearance:none;-webkit-appearance:none;display:block;width:100%;min-height:64px;padding:16px 53px 16px 62px;border-radius:16px;border:1px solid #d8e2f3;background:linear-gradient(115deg,#fff 55%,#f8faff);color:var(--ink);font-size:16px;font-weight:650;line-height:1.5;box-shadow:0 4px 14px #283b6009,inset 0 1px 0 #fff;transition:border-color .15s,box-shadow .15s}#tool-select:hover{border-color:#b4c8ef}#tool-select:focus{outline:none;border-color:#8aaaf8;box-shadow:0 0 0 3px #386bf315,0 4px 14px #283b6009}#tool-select option{background:white;color:var(--ink)}@media(prefers-reduced-motion:reduce){#tool-select{transition:none}}}