:root{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:#111;background:#f5f5f5;font-size:14px}
*{margin:0;padding:0;box-sizing:border-box}[hidden]{display:none!important}
body{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:32px 20px}
button,input{font:inherit;min-width:0}button{height:42px;padding:0 18px;border:0;border-radius:6px;cursor:pointer;font-weight:500;transition:background .15s,opacity .15s}button:disabled{opacity:.35;cursor:not-allowed}button:active{opacity:.7}button:focus-visible,a:focus-visible{outline:2px solid #111;outline-offset:3px}
.title-bar{width:100%;max-width:660px;display:flex;align-items:center;justify-content:space-between;padding:16px 24px;margin-bottom:12px;background:#111;color:#fff;border-radius:8px;box-shadow:0 4px 12px #0001}
.title-bar h1{font-size:17px;font-weight:600;letter-spacing:.5px}.badge{font-size:10px;background:#fff;color:#111;padding:3px 9px;border-radius:20px;letter-spacing:.5px}
.app{width:100%;max-width:660px;background:#fff;border:1px solid #e0e0e0;border-radius:8px;padding:24px}
.redeem-row{display:flex;align-items:stretch;gap:10px}.field{flex:1;min-width:0}.input-wrap{display:flex;align-items:stretch;border:1px solid #d0d0d0;border-radius:6px;overflow:hidden;background:#fff}.input-wrap:focus-within{border-color:#111;box-shadow:0 0 0 1px #111}
.input-prefix{display:flex;align-items:center;padding:0 13px;color:#333;background:#f5f5f5;border-right:1px solid #d0d0d0;font-size:13px;font-weight:500;white-space:nowrap}.input-wrap input{flex:1;width:100%;height:42px;padding:0 12px;border:0;outline:0;background:transparent;font:14px 'SF Mono',Menlo,Consolas,monospace;letter-spacing:.6px;text-transform:uppercase}.input-wrap input::placeholder{font-family:inherit;color:#aaa;letter-spacing:0;text-transform:none;font-size:13px}
.btn-primary{background:#111;color:#fff;width:100%}.btn-primary:hover:not(:disabled){background:#333}.redeem-row .btn-primary{width:100px;height:44px;flex-shrink:0}.btn-secondary,.secondary{background:#fff;color:#111;border:1px solid #d0d0d0}.btn-secondary:hover:not(:disabled),.secondary:hover:not(:disabled){background:#f5f5f5}
.result{margin-top:20px;padding-top:18px;border-top:1px solid #eee}.result-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}.result-heading h2{font-size:13px;font-weight:600}.result-count{font-size:12px;color:#888}.first-time{font-size:11px;color:#888;margin:-2px 0 10px;line-height:1.5}
.output{width:100%;height:240px;min-height:240px;max-height:240px;overflow:auto;background:#fafafa;border:1px solid #eee;border-radius:6px;padding:14px;font:12px/1.8 'SF Mono',Menlo,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-all;margin-bottom:12px}.output.placeholder{height:240px;display:flex;align-items:center;justify-content:center;color:#aaa;font-family:inherit;font-size:13px;word-break:normal}.output:focus-visible{outline:2px solid #111;outline-offset:2px}.output::-webkit-scrollbar{width:6px}.output::-webkit-scrollbar-thumb{background:#ccc;border-radius:4px}
.actions{display:flex;gap:10px}.actions button{flex:1;height:40px;font-size:13px}.msg{font-size:12px;margin-top:10px;color:#1a7f37;line-height:1.6;overflow-wrap:anywhere}.msg.err{color:#cf222e}.msg:empty{display:none}.contact{max-width:660px;width:100%;margin-top:12px;font-size:12px;line-height:1.6;color:#888;white-space:pre-wrap;overflow-wrap:anywhere}.contact:empty{display:none}
dialog.modal{width:calc(100% - 40px);max-width:480px;max-height:calc(100dvh - 40px);overflow:auto;border:0;border-radius:8px;padding:24px;margin:auto;background:#fff;color:#111;box-shadow:0 20px 60px #0003}dialog.modal::backdrop{background:#0006}body:has(dialog[open]){overflow:hidden}.modal h3{font-size:16px;font-weight:600;margin-bottom:4px}.modal-desc{font-size:12px;color:#888;margin-bottom:16px;line-height:1.6}.modal-cancel{width:100%;margin-top:10px;background:#f5f5f5;color:#111;font-size:13px}.modal-cancel:hover{background:#ececec}.opt{display:block;width:100%;height:auto;text-align:left;padding:12px 16px;border:1px solid #e5e5e5;border-radius:6px;background:#fff;color:#222;font-size:13px;font-weight:400;line-height:1.6;margin-bottom:10px;overflow-wrap:anywhere}.opt:hover{border-color:#111;background:#fafafa}
.verification{margin:16px 0}.verify-image-row{display:flex;gap:10px;align-items:center}.captcha-image{width:240px;max-width:calc(100% - 74px);height:auto;border-radius:6px;background:#fafafa}.verify-image-row button{padding:0 12px;font-size:12px;white-space:nowrap;background:#fff;color:#111;border:1px solid #d0d0d0}.verify-label{display:block;font-size:13px;font-weight:500;margin-top:14px}.captcha-answer{display:block;width:100%;height:44px;border:1px solid #d0d0d0;border-radius:6px;margin-top:8px;padding:0 12px;font:15px Menlo,monospace;letter-spacing:3px}.captcha-answer::placeholder{font-size:12px;letter-spacing:0}.captcha-answer:focus{outline:2px solid #111;outline-offset:-2px}.verify-message,.hint{font-size:12px;color:#888;line-height:1.6;margin-top:10px;overflow-wrap:anywhere}.verify-message:empty{display:none}.modal .msg{margin:10px 0}.modal .btn-primary{margin-top:12px}
dialog.toast-modal{max-width:340px;text-align:center;padding:28px 24px}.toast-icon{width:48px;height:48px;margin:0 auto 14px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#e8f5ec;color:#1a7f37;font-size:26px}.toast-modal p{font-size:13px;color:#888;margin:6px 0 18px;line-height:1.5;overflow-wrap:anywhere}.file-name{display:block;margin-bottom:18px;background:#f0f9f3;color:#1a7f37;padding:6px 10px;border-radius:4px;font:12px/1.6 Menlo,monospace;overflow-wrap:anywhere}.toast-ok{width:100%;background:#111;color:#fff}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#111;color:#fff;padding:12px 20px;border-radius:6px;z-index:1000;font-size:13px;max-width:90vw}.toast.error{background:#cf222e}
@media(max-width:480px){body{padding:20px 12px}.title-bar{padding:14px 18px}.title-bar h1{font-size:16px}.app{padding:18px}.redeem-row{flex-direction:column;gap:10px}.redeem-row .btn-primary{width:100%}.input-wrap input{height:44px}.result{margin-top:18px;padding-top:16px}.output{height:220px;min-height:220px;max-height:220px}.output.placeholder{height:220px}.actions button,button,.modal-cancel{min-height:44px}dialog.modal{width:calc(100% - 24px);padding:20px;max-height:calc(100dvh - 24px)}.opt{padding:12px 14px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* 分类采用紧凑行，超过三行时在区域内滚动。 */
.region-summary{margin-top:18px}.region-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;max-height:114px;overflow:auto;padding-right:3px;scrollbar-width:thin}.region-item{display:flex;align-items:center;justify-content:space-between;gap:6px;min-width:0;border:1px solid #e8e8e8;border-radius:5px;background:#fafafa;padding:7px 8px;min-height:32px;font-size:11px;color:#888}.region-name{min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.region-name small{font-size:9px;color:#aaa}.region-item strong{font-size:12px;color:#aaa;font-variant-numeric:tabular-nums;flex-shrink:0}.region-item.active{background:#f0f9f3;border-color:#b8dbc2;color:#1a7f37}.region-item.active strong{color:#1a7f37}.region-item.active small{color:#679b77}.region-grid::-webkit-scrollbar{width:5px}.region-grid::-webkit-scrollbar-thumb{background:#ccc;border-radius:3px}.region-summary+.result{margin-top:16px;padding-top:16px}@media(max-width:480px){.region-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.region-item{padding:7px 6px}.region-summary{margin-top:16px}}