:root{color-scheme:light;--ink:#242536;--muted:#777985;--accent:#6356dd;--line:#e5e5ec;--paper:#f8f9fc}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #a69af4;outline-offset:4px}[hidden]{display:none!important}.topbar{max-width:1180px;margin:auto;padding:27px 36px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:11px;font-weight:750;font-size:19px;letter-spacing:-.5px}.brand-icon{display:grid;place-items:center;width:34px;height:34px;background:var(--accent);color:white;border-radius:11px;font-size:29px;font-weight:400}.brand-sub{margin-left:15px;padding-left:15px;border-left:1px solid #d3d4df;font-size:12px;font-weight:500;letter-spacing:0;color:var(--muted)}.top-label{font-size:10px;letter-spacing:2px;color:var(--muted);font-weight:600}main{max-width:1050px;padding:0 36px;margin:0 auto}.search-section{max-width:800px;margin:76px auto 0;text-align:center}.eyebrow{font-size:10px;font-weight:650;letter-spacing:2.3px;color:var(--accent);display:flex;align-items:center;justify-content:center;gap:8px}.eyebrow span{width:6px;height:6px;background:var(--accent);border-radius:50%}h1{font-size:43px;letter-spacing:-1.8px;font-weight:650;line-height:1.35;margin:22px 0 15px}h1 span{color:var(--accent)}.intro{font-size:14px;color:var(--muted);margin:0 0 33px}.search-card{text-align:left;background:white;border:1px solid var(--line);border-radius:19px;padding:24px;box-shadow:0 12px 42px #28264a05}.modes{display:flex;gap:5px;padding:4px;border-radius:10px;background:#f3f3f8;width:fit-content;margin-bottom:23px}.mode{border:0;background:transparent;color:#777783;padding:10px 16px;font-size:12px;font-weight:650;border-radius:7px;transition:background .15s,color .15s}.mode span{margin-left:7px;font-size:11px;font-weight:400}.mode.active{background:white;color:var(--accent);box-shadow:0 1px 5px #25233e12}label{display:block;font-size:12px;font-weight:600;margin-bottom:9px}.input-row{display:flex;align-items:center;border:1px solid #dcdce8;border-radius:11px;padding:6px;transition:box-shadow .15s,border-color .15s}.input-row:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px #6356dd12}.input-icon{font-size:25px;line-height:1;padding:0 10px 3px;color:#9393a2}input{border:0;outline:0;background:transparent;font-size:15px;min-width:0;flex:1;padding:12px 0;color:var(--ink)}input::placeholder{color:#9d9eaa}.submit{border:0;background:var(--accent);color:white;border-radius:7px;padding:14px 24px;font-size:13px;font-weight:600;white-space:nowrap}.submit:hover{background:#5547ca}.submit span{margin-left:12px}.input-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;color:#90909f;font-size:11px}.input-footer button{border:0;background:none;color:var(--accent);padding:0;font-size:11px}.source-note{margin:17px auto 0;font-size:11px;line-height:1.8;color:#92929f;max-width:640px}.source-note a{text-decoration:underline;text-underline-offset:3px}.error{font-size:12px;color:#b12a42;margin:12px 0 0}.explainer{max-width:800px;margin:47px auto 70px;display:grid;grid-template-columns:1fr 1fr;gap:48px}.explainer article+article{border-left:1px solid var(--line);padding-left:38px}.card-number{font-size:10px;color:#9a9aaa;letter-spacing:1.5px}.explainer h2{font-size:14px;font-weight:600;margin:14px 0 9px}.explainer p{font-size:12px;color:#888995;line-height:1.9;margin:0;max-width:330px}.result{margin:38px 0 50px;background:white;border:1px solid var(--line);border-radius:16px;overflow:hidden}.result-header{display:flex;align-items:center;justify-content:space-between;padding:20px 23px;gap:15px}.result-header>div{display:flex;gap:12px;align-items:center;min-width:0}.result-type{font-size:10px;letter-spacing:.8px;background:#eeeafa;color:var(--accent);padding:5px 7px;border-radius:5px;flex-shrink:0}.result h2{font-size:16px;overflow-wrap:anywhere;margin:0;font-weight:600}.result-header>a{white-space:nowrap;font-size:12px;color:var(--accent)}#result-status{margin:0;padding:0 23px 15px;font-size:11px;color:var(--muted);line-height:1.7}iframe{display:block;border:0;border-top:1px solid var(--line);width:100%;height:880px;background:#fff}.result-note{font-size:11px;line-height:1.8;color:var(--muted);padding:15px 23px;border-top:1px solid var(--line);margin:0}footer{max-width:1180px;margin:0 auto;padding:22px 36px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:15px;font-size:10px;color:#9293a1}.footer-dot{margin:0 10px;color:#c2c2ce}.noscript{text-align:center;padding:24px}body.has-result .search-section{margin-top:36px}body.has-result h1{font-size:31px;margin-top:15px}body.has-result .intro{margin-bottom:24px}@media(max-width:600px){.topbar{padding:20px}.brand{font-size:17px}.brand-sub{font-size:11px;margin-left:10px;padding-left:10px}.top-label{display:none}main{padding:0 18px}.search-section{margin-top:48px}h1{font-size:31px;letter-spacing:-1px}.intro{font-size:12px;margin-bottom:27px}.search-card{padding:17px;border-radius:15px}.mode{padding:10px 13px}.mode span{margin-left:5px}.input-icon{padding:0 6px;font-size:23px}input{font-size:13px;padding:12px 0}.submit{padding:13px 16px}.submit span{display:none}.input-footer{align-items:flex-start;flex-direction:column;gap:12px;font-size:10px}.source-note{font-size:10px;text-align:left;margin:15px 8px 0}.explainer{gap:20px;margin:34px 0 45px}.explainer article+article{padding-left:20px}.explainer h2{font-size:13px}.explainer p{font-size:11px}.card-number{font-size:9px}.result{margin-top:28px}.result-header{padding:17px 14px;align-items:flex-start}.result-header>div{align-items:flex-start;flex-direction:column;gap:8px}.result-header>a{font-size:11px;padding-top:4px}.result h2{font-size:14px}#result-status{padding:0 14px 13px}iframe{height:900px}.result-note{padding:13px 14px}footer{padding:20px;flex-direction:column;font-size:10px;gap:9px}body.has-result h1{font-size:26px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Mobile browser sizing: keep touch targets readable and the source frame within the viewport. */
@media (max-width:600px){
  body{min-width:0}
  .topbar{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}
  main{padding-left:max(12px,env(safe-area-inset-left));padding-right:max(12px,env(safe-area-inset-right))}
  footer{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right));padding-bottom:max(20px,env(safe-area-inset-bottom));overflow-wrap:anywhere}
  .search-section{margin-top:32px}
  .search-card{padding:14px}
  .modes{display:flex;width:100%;max-width:100%;margin-bottom:18px}
  .mode{flex:1;min-width:0;min-height:44px;padding:9px 7px}
  .mode span{display:inline-block;margin-left:4px}
  .input-row{min-width:0}
  input{width:100%;min-width:0;font-size:16px;line-height:1.5;padding:10px 0}
  .submit{flex-shrink:0;min-width:58px;min-height:44px;padding:10px 12px}
  .input-footer{gap:3px;font-size:11px}
  .input-footer button{min-height:44px;font-size:12px;text-align:left}
  .source-note{font-size:11px;margin-left:2px;margin-right:2px;overflow-wrap:anywhere}
  .result{width:100%;min-width:0;scroll-margin-top:12px}
  .result-header{flex-wrap:wrap;gap:8px}
  .result-header>div{flex:1;min-width:0}
  .result-header>a{display:flex;align-items:center;min-height:44px;white-space:normal}
  .result h2{word-break:break-word;overflow-wrap:anywhere}
  iframe{width:100%;max-width:100%;height:75vh;height:clamp(420px,75dvh,900px)}
  .explainer{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
}
@media (max-width:360px){
  .brand-sub{margin-left:8px;padding-left:8px}
  h1{font-size:28px}
  .search-card{padding:12px}
  .input-icon{padding:0 4px}
  .mode{font-size:11px}
  .mode span{font-size:10px}
  .explainer{grid-template-columns:1fr;gap:22px}
  .explainer article+article{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:20px}
}
@media (orientation:landscape) and (max-height:500px) and (max-width:950px){
  .search-section,body.has-result .search-section{margin-top:20px}
  input{font-size:16px}
  iframe{height:80vh;height:80dvh;min-height:260px}
}