:root{--ink:#182b35;--muted:#667782;--green:#127c70;--line:#e4ebe9;--paper:#f4f7f7;--soft:#edf7f3}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 14% 0,#e0f1ec80,transparent 47%),var(--paper);color:var(--ink);font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;font-size:14px;line-height:1.6}button,input,textarea{font:inherit}button{cursor:pointer;transition:background .15s,box-shadow .15s}button:disabled{opacity:.5;cursor:not-allowed}a{color:var(--green)}button:focus-visible,input:focus-visible,textarea:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #83caba;outline-offset:3px}.site-header{height:82px;max-width:1100px;padding:0 34px;margin:auto;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;gap:11px;align-items:center;text-decoration:none;font-weight:700;font-size:19px;letter-spacing:-.5px;color:var(--ink)}.logo{display:grid;place-items:center;width:35px;height:35px;border-radius:11px;background:var(--green);color:white;font-size:26px;font-weight:400}.header-note{color:#72827f;font-size:12px}.redeem-main{max-width:840px;padding:0 26px;margin:21px auto 64px}.intro{text-align:center;margin:0 0 32px}.tag{font-size:10px;font-weight:700;letter-spacing:2px;color:var(--green)}h1{font-size:37px;letter-spacing:-1.6px;line-height:1.35;margin:13px 0 11px;font-weight:650}.intro p{color:var(--muted);margin:0;font-size:14px}.redeem-card{background:white;border:1px solid var(--line);border-radius:20px;box-shadow:0 16px 48px #223c3610;overflow:hidden}.service-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;padding:17px;border-bottom:1px solid var(--line);background:#fcfdfd}.service-nav button{background:transparent;border:1px solid transparent;border-radius:11px;text-align:left;padding:12px 12px 12px 44px;position:relative;color:#65737b}.service-nav button>span{position:absolute;left:15px;top:15px;font-size:23px;line-height:1}.service-nav strong{display:block;font-weight:600;font-size:14px}.service-nav small{display:block;font-size:10px;color:#8a969a;margin-top:2px}.service-nav button:hover{background:#f0f6f4}.service-nav .selected{border-color:#c9e4dc;background:#ecf7f3;color:var(--green)}.service-nav .selected small{color:#6a9286}.steps{display:flex;align-items:center;padding:24px 38px 12px;gap:12px}.step{display:flex;gap:7px;align-items:center;font-size:11px;color:#94a1a5;white-space:nowrap}.step span{width:23px;height:23px;border-radius:50%;background:#f2f5f5;color:#94a1a5;display:grid;place-items:center;font-size:11px}.step.active{color:var(--green);font-weight:600}.step.active span{background:var(--green);color:white}.step.done{color:#5c8d7c}.step.done span{background:#e8f5ee;color:#4c8c71}.steps b{flex:1;height:1px;background:#e7ecec}.view{padding:25px 38px 34px}.section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.section-mark{font-size:32px;font-weight:300;color:#dde9e5;line-height:1.1}h2{font-size:22px;letter-spacing:-.5px;line-height:1.45;margin:0 0 9px;font-weight:650}.description{font-size:13px;color:var(--muted);line-height:1.8;margin:0 0 23px}label{font-size:12px;font-weight:500;display:block;margin-bottom:9px;color:#536771}input,textarea{width:100%;border:1px solid #dbe4e3;border-radius:9px;padding:13px 15px;color:var(--ink);background:#fcfdfd}input{height:52px;font-size:14px}textarea{min-height:138px;resize:vertical;font:12px/1.7 Consolas,monospace}input::placeholder,textarea::placeholder{color:#a3afb2}input:focus,textarea:focus{border-color:#6dbca8;background:white}.primary{background:var(--green);border:1px solid var(--green);border-radius:9px;color:white;display:flex;justify-content:space-between;align-items:center;padding:13px 18px;margin-top:20px;font-size:14px;min-height:48px}.primary:hover{background:#086c61;box-shadow:0 4px 12px #10766b22}.primary span{font-size:21px;line-height:1}.wide{width:100%}.secondary{border:1px solid #dbe7e3;color:#355c54;background:#f8fbf9;padding:12px 18px;border-radius:9px;font-size:13px;min-height:46px}.secondary:hover{background:#edf6f1}.small{font-size:11px;color:#849297;line-height:1.85;margin:10px 0 0}.center{text-align:center}.hidden{display:none!important}.separate{height:1px;background:var(--line);margin:24px 0}.plan-box{display:flex;gap:14px;align-items:center;border:1px solid #dcebe4;background:#f3f9f6;padding:16px 18px;border-radius:10px;margin:20px 0 25px}.plan-box span{font-size:12px;color:#74897c}.plan-box strong{font-size:19px;font-weight:650;margin-left:auto}.plan-box em{font-style:normal;color:#7d8b82;font-size:10px}.inline-help{font-size:11px;color:#697e76;margin-top:10px}.inline-help summary{cursor:pointer}.inline-help p{font-size:11px;line-height:1.9;color:#7e8a87;margin-bottom:16px}.session-consent{display:flex;gap:10px;align-items:flex-start;font-size:12px;line-height:1.8;margin-top:20px;font-weight:400}.session-consent input{width:16px;height:16px;margin-top:3px;flex:0 0 16px;accent-color:var(--green)}.back-button,.text-button{display:block;background:none;border:0;color:#6c827a;padding:16px 0 0;font-size:12px;margin:auto}.text-button{padding:10px 0;margin:0;color:var(--green);font-size:11px}.confirm-box{border:1px solid var(--line);border-radius:11px;padding:0 18px;margin:22px 0}.confirm-box div{display:flex;gap:24px;justify-content:space-between;padding:17px 0;border-bottom:1px solid #edf1ef;font-size:14px}.confirm-box div:last-child{border:0}.confirm-box span{font-size:12px;color:#82908b}.confirm-box strong{font-weight:550;overflow-wrap:anywhere;min-width:0}.alert,.service-notice,.preview-notice{font-size:12px;line-height:1.8;border-radius:9px;padding:12px 16px;background:#fff6e7;color:#8a662c;border:1px solid #ecdcbf}.alert{margin:16px 38px 0}.service-notice,.preview-notice{margin:0 0 16px}.preview-notice{background:#f1f0fc;border-color:#e0dcf3;color:#706193}.result-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:50%;background:var(--soft);color:var(--green);font-size:27px;margin:3px 0 18px}.result-summary{font-size:13px;background:#f5f8f7;border:1px solid #e9efec;border-radius:9px;padding:15px 18px;line-height:1.9;overflow-wrap:anywhere;color:#49635a}.timeline{list-style:none;margin:24px 0 12px;padding:0 0 0 7px}.timeline li{border-left:1px solid #dce7e0;position:relative;padding:0 0 24px 21px;font-size:13px;color:#597367;line-height:1.7}.timeline li:last-child{border-color:transparent}.timeline li:before{content:'';width:8px;height:8px;background:#80ab94;border:3px solid white;border-radius:50%;position:absolute;left:-7px;top:3px;box-sizing:content-box}.timeline small{display:block;font-size:10px;color:#92a198;margin-top:5px}.faq{margin:43px 0 0;display:grid;grid-template-columns:.9fr 1.5fr;gap:34px;padding:0 5px}.faq-heading h2{font-size:19px;margin:10px 0}.faq-heading p{font-size:12px;color:#8a9892}.faq details{border-bottom:1px solid #dfe8e3;padding:13px 0}.faq details:first-child{padding-top:0}.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;font-size:13px;color:#4f655b}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:'+';margin-left:10px;color:#8ea79a}.faq details[open] summary:after{content:'−'}.faq details p{font-size:12px;color:#7b8f82;line-height:1.9;margin-bottom:1px}footer{font-size:11px;color:#94a29d;text-align:center;padding:0 22px 28px;line-height:2}footer span{display:block;font-size:10px;color:#a6b0ac}
@media(max-width:650px){.site-header{height:70px;padding:0 22px}.brand{font-size:17px}.header-note{font-size:10px}.redeem-main{padding:0 17px;margin:19px auto 44px}.intro{margin-bottom:26px}h1{font-size:29px;letter-spacing:-1px}.intro p{font-size:12px}.service-nav{padding:10px;gap:5px}.service-nav button{padding:11px 5px;text-align:center}.service-nav button>span{display:none}.service-nav strong{font-size:12px}.service-nav small{font-size:9px}.steps{padding:21px 22px 10px;gap:6px}.step{font-size:10px;gap:4px}.step span{width:19px;height:19px;font-size:10px}.view{padding:22px 23px 28px}.alert{margin:14px 23px 0}h2{font-size:21px}.section-mark{font-size:28px}.plan-box{gap:8px;padding:13px}.plan-box em{font-size:9px}.faq{display:block;margin-top:32px;padding:0 6px}.faq-items{margin-top:23px}.faq-heading h2{margin-bottom:5px}.confirm-box div{gap:15px}.result-summary{font-size:12px}}
.help-dialog{width:min(600px,calc(100% - 32px));max-height:85vh;max-height:85dvh;margin:auto;padding:30px;border:1px solid var(--line);border-radius:18px;color:var(--ink);background:white;box-shadow:0 24px 90px #182b3540;overflow-y:auto}.help-dialog::backdrop{background:#182b3570}.help-dialog .faq{display:block;margin:0;padding:0}.help-dialog .faq-heading{padding-right:38px}.help-dialog .faq-items{margin-top:22px}.help-dialog .faq details{padding:14px 0}.help-dialog .faq summary{font-weight:600}.help-dialog .faq details p{color:#60766b}.help-close{position:absolute;right:16px;top:16px;display:grid;place-items:center;width:36px;height:36px;border:0;border-radius:50%;background:#f0f6f4;color:#536e62;font-size:25px;line-height:1}.help-close:hover{background:#e3f0eb}body:has(.help-dialog[open]){overflow:hidden}@media(max-width:650px){.help-dialog{padding:24px 22px}.help-dialog .faq-items{margin-top:16px}}
.prefix-guide{display:flex;flex-wrap:wrap;gap:7px 12px;margin-top:12px;font-size:10px;color:#647b70}.prefix-guide span{background:#f1f7f4;border:1px solid #e1ebe5;border-radius:5px;padding:4px 7px}.prefix-guide code{color:var(--green);font-size:10px;font-weight:600}.session-guide-button{display:flex;justify-content:space-between;align-items:center;gap:12px;width:100%;border:1px solid #cce4dc;border-radius:9px;padding:13px 15px;background:#f1f9f5;color:#46685b;font-size:12px;margin-bottom:21px;text-align:left}.session-guide-button strong{color:var(--green);white-space:nowrap;font-weight:600}.session-guide-button:hover{background:#e7f4ee}.demo-session-tools{padding:14px;border:1px solid #e0dcf3;border-radius:9px;background:#f7f6fd;margin-bottom:20px}.demo-session-tools p{font-size:12px;line-height:1.8;margin:0 0 12px;color:#74698d}.session-tutorial{padding-left:22px;margin:15px 0 18px}.session-tutorial li{padding-left:5px;margin-bottom:18px;font-size:12px;color:#537263}.session-tutorial li::marker{font-weight:700;color:var(--green)}.session-tutorial strong{font-size:13px;font-weight:600}.session-tutorial p{margin-top:5px}.session-link{display:block;border:1px solid #cfe5dc;background:#eef8f3;border-radius:7px;padding:10px;margin-top:10px;overflow-wrap:anywhere;font-size:12px;text-decoration:none}.tutorial-note{font-size:11px;line-height:1.9;border-radius:7px;padding:12px;background:#fff7eb;color:#886d44}.help-dialog code{font-size:11px;color:var(--green)}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.account-checking{width:min(320px,calc(100% - 40px));margin:auto;padding:34px 24px;border:1px solid #e1ebe7;border-radius:18px;background:white;color:var(--ink);text-align:center;box-shadow:0 22px 80px #00000030}
.account-checking::backdrop{background:rgba(0,0,0,.48)}
.checking-content{display:flex;flex-direction:column;align-items:center}
.account-checking h2{margin:18px 0 0;font-size:20px;font-weight:600}
.account-checking p{margin:7px 0 0;font-size:13px;color:var(--muted);line-height:1.7}
.checking-spinner{display:block;width:38px;height:38px;border:3px solid #dcebe5;border-top-color:var(--green);border-radius:50%;animation:account-check-spin .8s linear infinite}
body:has(#accountChecking[open]){overflow:hidden}
#accountNextButton:disabled{opacity:1;background:#467f74;border-color:#467f74;cursor:wait;box-shadow:none}
@keyframes account-check-spin{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){.checking-spinner{animation:none}}

.invoice-panel{margin:22px 0 8px;padding:18px;border:1px solid var(--line);border-radius:12px;background:#f8fbfa;text-align:left}
.invoice-heading{display:flex;align-items:center;justify-content:space-between;gap:14px}.invoice-heading h3{font-size:15px;margin:0}.invoice-heading p{font-size:12px;color:var(--muted);margin:3px 0 0}.invoice-heading button{white-space:nowrap;margin:0;padding:9px 14px}
.invoice-details{font-size:12px;color:var(--muted);margin-top:14px;line-height:1.9}.invoice-links{display:flex;gap:10px;flex-wrap:wrap}.invoice-links a{display:inline-block;border:1px solid #cce4dc;border-radius:8px;background:white;padding:9px 14px;margin-top:12px;text-decoration:none;font-weight:600}.invoice-links a:hover{background:var(--soft)}
.invoice-link-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.invoice-link-row button{margin-top:12px;padding:9px 14px;font-size:13px}
@media(max-width:440px){.invoice-heading{align-items:flex-start;flex-direction:column}.invoice-heading button{width:100%}}