:root{--paper:#fbf7ef;--ink:#28201c;--muted:#817268;--lime:#bd3029;--line:#e6d9c9;--dark:#321d1b}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:disabled{opacity:.6;cursor:wait}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #7f9d29;outline-offset:5px}button{border:0}header{height:100px;padding:0 5%;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:28px}.logo{font-size:30px;font-weight:900;display:flex;align-items:center;gap:10px;white-space:nowrap;letter-spacing:-1px}.logo svg{width:25px;height:31px;fill:none;stroke:currentColor;stroke-width:2}.logo>span{font-size:12px;font-weight:400;margin-left:15px;padding-left:20px;border-left:1px solid #c9ccbf;letter-spacing:1px}nav{display:flex;gap:30px;font-size:14px}nav a{transition:color .2s}nav a:hover{color:#a52320}.nav-action{font-size:14px;padding:12px 21px;border:1px solid #bdc0b3;background:transparent;border-radius:6px;white-space:nowrap}.nav-action span{margin-left:18px}.hero{display:grid;grid-template-columns:1.13fr 1fr;gap:50px;padding:64px 6% 60px;align-items:center;max-width:1560px;margin:auto}.eyebrow{font-size:13px;font-weight:500;display:flex;align-items:center;gap:9px;letter-spacing:1.8px;margin-bottom:25px}.status-dot{width:7px;height:7px;background:#b82a23;border-radius:100%}h1{font-size:clamp(42px,4.4vw,70px);line-height:1.37;letter-spacing:-2.6px;font-weight:800;margin:0 0 26px}.highlight{position:relative;z-index:0;white-space:nowrap}.highlight:after{content:"";position:absolute;background:var(--lime);height:20%;left:0;right:0;bottom:7%;z-index:-1}p{color:var(--muted)}.hero-description{font-size:17px;line-height:1.95;margin-bottom:30px}.hero-actions{display:flex;gap:27px;align-items:center}.primary{background:var(--lime);padding:16px 23px;display:inline-flex;align-items:center;justify-content:center;gap:16px;border-radius:5px;font-size:15px;font-weight:600;transition:background .2s,transform .2s}.primary:hover{background:#a92321;transform:translateY(-2px)}.primary svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7}.primary>span:last-child{margin-left:20px;font-size:21px;line-height:1}.text-button{padding:10px 0;background:transparent;font-size:14px}.text-button:hover{text-decoration:underline}.text-button span{margin-left:9px}.hero-foot{display:flex;align-items:center;gap:13px;margin-top:36px;font-size:12px;color:var(--muted)}.tiny-avatars{display:flex;padding-left:3px}.tiny-avatars i{display:grid;place-items:center;width:27px;height:27px;border:2px solid var(--paper);background:#e3e6d2;border-radius:100%;margin-left:-3px;color:#5a624c;font-style:normal;font-size:10px}.tiny-avatars i:nth-child(2){background:#dfd4c7}.tiny-avatars i:nth-child(3){background:#cbd9d8}.disclosure{font-size:12px;margin-top:15px}.hero-visual{position:relative;min-height:590px;background:#f0dfca;border-radius:12px;overflow:hidden;display:flex;align-items:center;justify-content:center;background-image:radial-gradient(#b8c0a640 .8px,transparent .8px);background-size:12px 12px}.visual-label{position:absolute;left:24px;right:24px;top:18px;display:flex;justify-content:space-between;font-size:12px;color:#7f8972;letter-spacing:1px}.receipt{position:relative;margin-top:-10px;width:305px;padding:28px 25px 22px;background:#fffefa;box-shadow:0 14px 30px #4b543221;transform:rotate(-7deg);font-family:"Noto Sans SC",monospace;z-index:1;clip-path:polygon(0 0,100% 0,100% 98%,97% 100%,94% 98%,91% 100%,88% 98%,85% 100%,82% 98%,79% 100%,76% 98%,73% 100%,70% 98%,67% 100%,64% 98%,61% 100%,58% 98%,55% 100%,52% 98%,49% 100%,46% 98%,43% 100%,40% 98%,37% 100%,34% 98%,31% 100%,28% 98%,25% 100%,22% 98%,19% 100%,16% 98%,13% 100%,10% 98%,7% 100%,4% 98%,0 100%)}.receipt-top{font-weight:800;font-size:17px;display:flex;justify-content:space-between}.receipt-top span{font-size:11px;letter-spacing:2px;font-weight:400;color:#818477}.merchant{font-size:30px;text-align:center;font-weight:900;margin-top:18px;letter-spacing:4px}.receipt-caption{text-align:center;font-size:10px;color:#848578;letter-spacing:1px;margin:5px 0}.receipt-divider{border-top:1px dashed #c4c7ba;margin:18px 0}.receipt-row{display:flex;justify-content:space-between;font-size:12px;margin:11px 0;gap:9px}.muted{color:#858978}.receipt-total{display:flex;justify-content:space-between;align-items:center;font-size:14px}.receipt-total strong{font-size:22px}.reward-print{margin:20px 0 16px;background:#fae8dd;padding:11px;text-align:center;display:grid;gap:1px}.reward-print>span{font-size:11px}.reward-print strong{font-size:27px;color:#ac2c24}.reward-print small{font-size:10px;color:#7b865e}.barcode{height:26px;width:160px;margin:10px auto;background:repeating-linear-gradient(90deg,#30342a 0 1px,transparent 1px 3px,#30342a 3px 5px,transparent 5px 7px,#30342a 7px 8px,transparent 8px 12px);opacity:.7}.reward-tag{z-index:2;position:absolute;bottom:80px;left:11%;right:4%;background:#fffefb;border:1px solid #e1e5d4;box-shadow:0 14px 34px #333f2720;padding:17px 18px;display:flex;align-items:center;gap:14px;border-radius:9px;transform:rotate(3deg)}.tag-icon{background:var(--lime);width:45px;height:45px;border-radius:50%;display:grid;place-items:center;font-size:27px}.reward-tag small{display:block;font-size:11px;color:var(--muted)}.reward-tag strong{font-size:22px;display:block}.reward-tag strong span{font-size:11px;font-weight:400;color:var(--muted);margin-left:9px}.tag-check{margin-left:auto;color:#7d943c;font-size:20px}.orbit-word{position:absolute;bottom:20px;font-size:12px;color:#7e886c;letter-spacing:4px}.brand-ribbon{display:flex;justify-content:space-between;align-items:center;padding:30px 6%;border-top:1px solid var(--line);border-bottom:1px solid var(--line);gap:25px}.brand-ribbon>span{font-size:12px;color:#8a8d81}.brand-ribbon b{font-size:23px;color:#68705f;font-weight:800;white-space:nowrap}.brand-ribbon .costco{font-style:italic;font-size:27px}.brand-ribbon .amazon{letter-spacing:2px}.brand-ribbon .starbucks{font-size:20px}.brand-ribbon i{font-size:30px}.section{padding:92px 6%;max-width:1560px;margin:auto}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:43px;gap:25px}.kicker{font-size:12px;letter-spacing:2px;color:#6c765c;display:block;margin-bottom:16px;font-weight:500}h2{font-size:clamp(30px,3vw,44px);line-height:1.45;letter-spacing:-1px;margin:0;font-weight:700}.section-heading>p{font-size:14px;margin-bottom:6px;line-height:1.9}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.steps article{border-top:1px solid #bec4b2;padding-top:20px}.step-number{font-size:12px;letter-spacing:1.4px;color:#717965}.step-icon{width:51px;height:51px;display:grid;place-items:center;margin:31px 0 22px;background:#f0dfca;border-radius:10px;font-size:35px;line-height:1}.steps h3{font-size:20px;font-weight:600;margin:0 0 9px}.steps p{font-size:14px;line-height:1.9;max-width:320px}.calculator-section{background:var(--dark);color:#f3f4eb;display:grid;grid-template-columns:1fr 1fr;gap:12%;padding:75px 9%;}.calculator-section .kicker{color:#e9bb75}.calculator-copy>p{color:#a4ac97;font-size:14px;line-height:1.9;margin-top:22px}.calc-controls{margin-top:28px;max-width:440px}label{display:block;font-size:14px;margin-bottom:7px}select,input[type=date],input[type=number]{border:1px solid var(--line);background:#fffefb;border-radius:5px;padding:11px 12px;color:var(--ink);width:100%;min-width:0}.calc-controls select{background:#442923;color:#eff4e6;border-color:#505843}.amount-label{display:flex;justify-content:space-between;align-items:center;margin-top:26px}.amount-label label{margin:0;color:#c0c8b4}.amount-label>span{font-size:24px;font-weight:500;white-space:nowrap}.amount-label input{background:transparent;color:#fff;border:0;border-bottom:1px solid #697359;border-radius:0;width:140px;font-size:24px;text-align:right;padding:5px 0}.calc-controls input[type=range]{accent-color:var(--lime);width:100%;margin-top:24px;cursor:pointer}.range-labels{display:flex;justify-content:space-between;font-size:12px;color:#a4ad96}.calc-result{background:#f5f5ed;color:var(--ink);border-radius:9px;padding:27px 31px;align-self:center}.result-header{display:flex;justify-content:space-between;font-size:14px;align-items:center}.pill{background:#f5e4ce;color:#617145;border-radius:30px;padding:4px 10px;font-size:11px}.result-number{padding:27px 0 20px;border-bottom:1px dashed #bfc5b2}.result-number>span{font-size:12px;color:#7a8170}.result-number>strong{font-size:64px;letter-spacing:-3px;line-height:1.4;display:block;font-weight:600}.result-number p{font-size:12px;margin-top:3px}.result-lines{padding:15px 0 20px;display:grid;gap:9px;font-size:13px}.result-lines div{display:flex;justify-content:space-between}.result-lines span{color:#7c8171}.result-lines b{font-weight:500}.full{width:100%;justify-content:space-between}.fine-print{font-size:12px;line-height:1.8;color:#7c8172;margin:15px 0 0}.section-note{color:#8c9083;font-size:12px}.brand-cards{display:grid;grid-template-columns:1fr 1fr;gap:28px}.brand-card{padding:0;text-align:left;background:transparent}.card-photo{height:315px;position:relative;overflow:hidden;border-radius:9px;background:#ead7c1}.card-photo img{width:100%;height:100%;object-fit:cover;transition:transform .5s}.brand-card:hover img{transform:scale(1.035)}.tech img{object-position:center 48%}.photo-badge{position:absolute;top:20px;left:20px;font-size:12px;padding:7px 13px;background:#fffef3ec;border-radius:3px;color:#4b5043}.card-bottom{display:flex;align-items:center;justify-content:space-between;padding:21px 2px}.card-bottom h3{font-size:19px;font-weight:600;margin:0 0 7px}.card-bottom p{font-size:13px;margin:0;color:#4f5846}.card-bottom p span{color:#969a8d;margin-left:10px}.circle-arrow{width:40px;height:40px;border:1px solid #c9cebe;border-radius:50%;display:grid;place-items:center;font-size:22px}.faq-section{padding:10px 6% 90px;display:grid;grid-template-columns:1fr 1.35fr;gap:70px;max-width:1560px;margin:auto}.faq-section>div>p{font-size:14px;margin-top:20px}details{border-bottom:1px solid var(--line);padding:20px 0}details:first-child{border-top:1px solid var(--line)}summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px;font-size:16px;font-weight:500}summary::-webkit-details-marker{display:none}summary:after{content:"+";font-size:20px;font-weight:400}details[open] summary:after{content:"−"}details p{font-size:14px;line-height:1.9;padding-right:35px;margin:16px 0 5px}.closing{position:relative;overflow:hidden;margin:0 4% 55px;padding:54px 4%;background:#f1dfca;border-radius:10px}.closing h2{position:relative;z-index:1;font-size:36px}.closing .primary{margin-top:29px}.closing-mark{position:absolute;right:6%;bottom:-56px;font-size:230px;letter-spacing:-23px;font-weight:900;color:#e4c6a0;transform:rotate(-12deg);user-select:none}footer{padding:0 6% 40px;display:flex;align-items:center;gap:25px}.footer-brand{font-size:26px;font-weight:800}footer>span{font-size:12px;color:#8e9483}footer small{font-size:11px;color:#939888;margin-left:auto}footer .text-button{font-size:12px}dialog{border:1px solid #dedfd5;background:var(--paper);color:var(--ink);padding:35px;border-radius:14px;width:min(540px,calc(100% - 28px));max-height:90dvh;overflow:auto;box-shadow:0 24px 100px #1e241d33}dialog::backdrop{background:#242b2375;backdrop-filter:blur(6px)}dialog h2{font-size:28px}dialog .close{position:absolute;right:18px;top:12px;background:transparent;font-size:29px;color:#747a6b;padding:2px 8px}.dialog-intro{font-size:14px}.camera-box{height:175px;display:grid;place-items:center;background:#f1e3d3;border:1px dashed #bdc8ab;border-radius:6px;overflow:hidden;text-align:center}.camera-box video,.camera-box img{width:100%;height:100%;object-fit:contain}.camera-box #camera-placeholder>span{font-size:46px;line-height:1}.camera-box p{font-size:12px;margin:10px 0}.camera-actions{display:flex;gap:15px;align-items:center;margin-top:12px}.secondary{background:transparent;border:1px solid #b8c1ab;border-radius:5px;padding:9px 17px;font-size:14px}.inline-message{font-size:13px;color:#786333;min-height:0}.inline-message:empty{display:none}form{margin-top:21px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:17px}form .primary{margin-top:20px}.success-icon{width:60px;height:60px;border-radius:50%;background:var(--lime);display:grid;place-items:center;font-size:30px;margin:15px auto 25px}#scan-success{text-align:center}#success-amount{display:block;font-size:52px;margin:24px 0 7px;font-weight:600}#success-detail{font-size:14px}#scan-success .primary{margin-top:26px}.wallet-summary{display:grid;background:#f5e4d3;border-radius:8px;padding:23px;margin:24px 0;gap:5px}.wallet-summary>span{font-size:13px;color:#697459}.wallet-summary strong{font-size:42px;font-weight:600}.wallet-summary small{font-size:12px;color:#7c856f}.empty-state{text-align:center;padding:28px 10px;color:#7e8672;font-size:14px}.history-row{padding:17px 0;display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);align-items:center}.history-row strong{font-size:16px;font-weight:500}.history-row small{display:block;color:#8a917d;font-size:12px;margin-top:4px}.history-row>b{color:#b22c24;font-size:18px;white-space:nowrap}.wallet-actions{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:22px}#clear-confirm{margin-top:20px;border:1px solid #d7c9b1;border-radius:7px;padding:16px;font-size:14px}#clear-confirm p{margin-top:0}.danger{background:#82483c;color:white;padding:10px 16px;border-radius:4px;margin-left:8px;font-size:14px}#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(100px);opacity:0;transition:.25s;z-index:20;background:var(--ink);color:white;border-radius:8px;padding:12px 23px;font-size:14px;max-width:90vw;text-align:center}#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}[hidden]{display:none!important}
@media(min-width:1600px){header,.brand-ribbon,footer{padding-left:calc((100% - 1370px)/2);padding-right:calc((100% - 1370px)/2)}.calculator-section{padding-left:calc((100% - 1250px)/2);padding-right:calc((100% - 1250px)/2)}}
@media(max-width:1100px){header{gap:20px}.logo>span{display:none}nav{gap:23px}.hero{gap:30px;padding:45px 5%}.hero-visual{min-height:540px}h1{font-size:45px;letter-spacing:-2px}.hero-description{font-size:15px}.hero-actions{gap:18px}.primary{padding:15px 18px}.hero-foot{font-size:11px}.brand-ribbon>span:last-child{display:none}.calculator-section{gap:7%;padding:65px 6%}.calc-result{padding:23px}.section{padding:70px 6%}.card-photo{height:270px}.closing-mark{right:1%;font-size:190px}.faq-section{gap:40px}footer{gap:20px}footer>span{display:none}}
@media(max-width:760px){header{height:76px;padding:0 6%}.logo{font-size:26px}nav{display:none}.nav-action{font-size:13px;padding:9px 13px}.hero{grid-template-columns:1fr;gap:31px;padding:35px 6% 32px}.hero-copy{padding:5px 0}.eyebrow{margin-bottom:18px}h1{font-size:clamp(37px,8.2vw,60px);line-height:1.4;letter-spacing:-1.8px}.hero-description{font-size:15px;margin-bottom:25px}.hero-foot{margin-top:25px}.hero-visual{min-height:540px}.receipt{width:300px}.reward-tag{left:12%;right:6%;bottom:80px}.hero-visual .reward-tag{bottom:80px}.brand-ribbon{padding:24px 6%;flex-wrap:wrap;gap:18px 27px;justify-content:center}.brand-ribbon>span:first-child{width:100%;text-align:center;font-size:12px}.brand-ribbon b{font-size:18px}.brand-ribbon .costco{font-size:22px}.brand-ribbon .starbucks{font-size:17px}.section{padding:50px}.section{padding:54px 6%}.section-heading{display:block;margin-bottom:27px}h2{font-size:32px}.section-heading>p{margin:17px 0 0}.steps{grid-template-columns:1fr;gap:23px}.steps article{position:relative;padding-left:0}.steps .step-icon{float:left;margin:21px 20px 8px 0;width:44px;height:44px;font-size:30px}.steps h3{font-size:19px;margin-top:20px}.steps p{max-width:none;margin-top:8px}.step-number{display:block}.calculator-section{grid-template-columns:1fr;padding:50px}.calculator-section{padding:48px 6%;gap:32px}.calc-controls{max-width:none}.result-number>strong{font-size:58px}.section-note{display:block;margin-top:17px}.brand-cards{grid-template-columns:1fr;gap:22px}.card-photo{height:290px}.card-bottom h3{font-size:18px}.faq-section{grid-template-columns:1fr;padding:10px 6% 50px;gap:15px}summary{font-size:15px}.closing{margin:0 4% 30px;padding:37px 7%}.closing h2{font-size:27px}.closing-mark{font-size:130px;bottom:-38px;opacity:.7;right:-4%}.closing .primary{position:relative;z-index:1}footer{padding:0 6% 27px;flex-wrap:wrap;gap:10px 20px}footer small{order:3;flex:1 0 100%;font-size:10px}footer .text-button{margin-left:auto}dialog{padding:30px 23px;max-height:93dvh}dialog h2{font-size:25px}.form-row{gap:10px}.form-row input{font-size:14px}.camera-actions{gap:12px}.camera-actions .text-button{font-size:12px}.reward-tag{max-width:355px}.hero-actions .primary{gap:8px}.hero-actions .primary>span:last-child{margin-left:8px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}


/* 中国红、墨色与鎏金 */
:root{--lime:#bd3029;--gold:#bd914d} .primary{color:#fff8ed}.highlight:after{background:#eac994}.hero-visual{background-color:#efdbc0;background-image:radial-gradient(#ac673722 .8px,transparent .8px)}.hero .eyebrow{color:#a52b25}.receipt{font-family:SimSun,"Songti SC",serif;padding-top:20px}.receipt .merchant{font-size:25px}.receipt-caption{line-height:1.6}.receipt-stamp{position:absolute;right:20px;bottom:47px;border:2px solid #be3029;color:#be3029;padding:4px 7px;transform:rotate(12deg);font:700 15px/1.1 SimSun,serif;text-align:center;opacity:.8}.receipt-stamp small{font-size:9px}.hero-visual{min-height:650px}.reward-tag{bottom:68px}.tag-icon{color:#fff8eb}.tag-check{color:#b22c24}.kicker,.step-number{color:#9b4d35}.brand-ribbon b{color:#755644}.closing-mark{color:#dfbea0}.calc-controls input[type=range]{accent-color:#e5ad65}.amount-label label,.calculator-copy>p,.range-labels{color:#d0b7a1}.calculator-copy h2{color:#fff5df}.reward-print small{color:#90624a}.pill{color:#99432d}.brand-ribbon{border-color:#dfc6ab}.logo{color:#a82722}.logo>span{color:#7f6957}.hero-foot{display:none}.hero-copy .disclosure{margin-top:25px}.hero h1{font-family:"Noto Serif SC",SimSun,"Songti SC",serif;font-weight:900;letter-spacing:-1.5px}.hero-visual .receipt-top{color:#a82722}.closing{border:1px solid #dfbd94}.success-icon{color:white}@media(max-width:760px){.hero-visual{min-height:640px}.hero h1{font-size:40px}.receipt{width:290px}}

/* Readable reward calculator: explicit surface colors and clear controls. */
.calculator-section{background:#321d1b;color:#fff5df;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8%}
.calculator-copy>p,.calculator-section .amount-label label,.calculator-section .range-labels{color:#e2cbbb}
.calculator-section .calc-controls>label{color:#fff5df;font-weight:600}
.calculator-section .calc-controls select{background:#fff9f0;color:#321d1b;border:1px solid #d3b99c;min-height:48px}
.calculator-section .amount-label>span{display:flex;align-items:center;gap:10px;color:#fff5df}
.calculator-section .amount-label input{width:155px;padding:8px 12px;background:#fff9f0;color:#321d1b;border:1px solid #d3b99c;border-radius:6px;font-variant-numeric:tabular-nums}
.calculator-section .calc-controls input[type=range]{height:24px;margin:20px 0 6px;accent-color:#e5ad65}
.calculator-section .calc-result{background:#fff9f0;color:#321d1b;border:1px solid #e4c7a9;border-radius:14px;box-shadow:0 16px 40px #170b0926}
.calculator-section .result-header{font-weight:600;gap:12px}
.calculator-section .result-number{border-color:#d8bea7}
.calculator-section .result-number>strong{color:#ac2c24;font-weight:700;font-variant-numeric:tabular-nums}
.calculator-section .result-number>span,.calculator-section .result-number p,.calculator-section .result-lines span,.calculator-section .fine-print{color:#705747;font-size:13px}
.calculator-section .result-lines{gap:12px;font-size:14px}
.calculator-section .result-lines b{color:#321d1b;font-weight:600;font-variant-numeric:tabular-nums}
.calculator-section .pill{background:#f2e1cb;color:#86402c}
.calculator-section :focus-visible{outline:3px solid #e5ad65;outline-offset:4px}
@media(max-width:760px){.calculator-section{grid-template-columns:minmax(0,1fr);gap:30px}.calculator-section .calc-result{padding:24px 20px}.calculator-section .result-number>strong{font-size:clamp(42px,12vw,58px)}}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}.social-x{display:grid;place-items:center;width:44px;height:44px;border:1px solid #321d1b;border-radius:6px;background:#321d1b;color:#fff9f0;transition:background .2s}.social-x:hover{background:#a82722;border-color:#a82722}.social-x svg{width:18px;height:18px;fill:currentColor}@media(min-width:761px) and (max-width:1250px){body>header{gap:16px}body>header .logo>span{display:none}body>header nav{gap:16px}}@media(max-width:760px){.header-actions{gap:8px}body>header{gap:12px}.header-actions .nav-action{min-height:44px;padding:9px 10px}.header-actions .nav-action span{margin-left:8px}}