@font-face{font-family:Inter;src:url('/static/inter-latin.woff2') format('woff2');font-style:normal;font-weight:100 900;font-display:swap}
:root{color-scheme:dark;--bg:#080f18;--surface:#101a27;--surface-deep:#0c1520;--line:#253341;--text:#f0f3f7;--muted:#9aa7b6;--mint:#88dfc7;--mint-hover:#a6edd9;--mint-dark:#102c2b;--amber:#f4bc5d;--amber-bg:#201d15;--red:#ffab9e;--radius:12px;--font:Inter,"PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.65}button{color:inherit}input,select,textarea{color:var(--text);background:var(--surface-deep);border:1px solid #455465;border-radius:8px}input:focus,select:focus,textarea:focus{outline:2px solid var(--mint);outline-offset:3px}input[aria-invalid=true]{border-color:var(--red)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--mint);outline-offset:5px;border-radius:4px}button:disabled{pointer-events:none}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.3;letter-spacing:-.035em}h1{font-size:44px;font-weight:650}h2{font-size:30px;font-weight:600}h3{font-size:20px;font-weight:600}p{line-height:1.8}strong{font-weight:600}small{font-size:.68em;font-weight:500}ul{padding:0;list-style:none}.icon{flex:none;width:24px;height:24px;display:inline-block;vertical-align:middle;filter:invert(87%) sepia(11%) saturate(832%) hue-rotate(104deg) brightness(97%) contrast(88%)}.muted{color:var(--muted)}.mint{color:var(--mint)}.amber{color:var(--amber)}.small{font-size:14px}.tiny{font-size:12px}.center{text-align:center}.wrap{width:min(1360px,calc(100% - 80px));margin-inline:auto}.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:50px;border-radius:8px;padding:12px 22px;font-size:15px;font-weight:600;border:1px solid transparent;transition:background .18s,transform .18s}.button:hover{transform:translateY(-1px)}.primary{background:var(--mint);color:#092521}.primary:hover{background:var(--mint-hover)}.primary .icon{filter:brightness(0) saturate(100%) invert(12%) sepia(27%) saturate(1091%) hue-rotate(119deg) brightness(93%) contrast(94%)}.secondary{background:var(--surface);border-color:var(--line)}.secondary:hover{background:#1a2936}.quiet{background:transparent;color:var(--muted)}.quiet:hover{color:var(--text);background:#ffffff05}.wide{width:100%}.text-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;background:none;border:0;padding:0}.text-link:hover{color:var(--mint)}.text-link .icon{width:18px;height:18px}.eyebrow{font-size:12px;font-weight:600;letter-spacing:.11em;color:var(--mint);text-transform:uppercase;margin-bottom:18px}.lead{color:var(--muted);font-size:18px;line-height:1.8;margin-top:20px;max-width:650px}.skip-link{position:fixed;top:-100px;left:16px;z-index:20;background:var(--mint);color:var(--bg);padding:12px 20px}.skip-link:focus{top:12px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}
.header{height:80px;border-bottom:1px solid var(--line);background:var(--bg);position:relative;z-index:10}.header-inner{height:100%;width:min(1360px,calc(100% - 80px));margin:auto;display:flex;align-items:center;gap:38px}.brand{display:flex;align-items:center;gap:16px;white-space:nowrap}.brand-name{font-size:30px;font-weight:700;letter-spacing:-.04em;color:var(--mint)}.brand-divider{width:1px;height:23px;background:var(--line)}.brand-sub{font-size:17px;font-weight:500;letter-spacing:-.025em}.desktop-nav{display:flex;gap:26px;align-self:stretch;align-items:center;margin-left:18px;font-size:14px;color:var(--muted)}.desktop-nav a{height:100%;display:flex;align-items:center;border-bottom:2px solid transparent;padding-top:2px}.desktop-nav a[aria-current]{color:var(--mint);border-bottom-color:var(--mint)}.desktop-nav a:hover{color:var(--text)}.header-actions{margin-left:auto;display:flex;align-items:center;gap:20px}.sim-badge{color:var(--mint);display:flex;align-items:center;gap:8px;border:1px solid #416b61;background:#0c1b20;border-radius:30px;padding:5px 12px;font-size:12px;white-space:nowrap}.sim-badge .icon{width:18px;height:18px}.language-switch{display:flex;align-items:center;gap:7px;font-size:13px;min-height:44px}.language-switch .icon{width:17px;height:17px;filter:invert(.7)}.icon-button{border:1px solid var(--line);background:transparent;width:42px;height:42px;border-radius:8px}.menu-toggle{display:none}.mobile-nav{position:absolute;top:79px;background:var(--surface);width:100%;padding:14px 24px;border-bottom:1px solid var(--line)}.mobile-nav a{display:block;padding:12px 0}
.home-hero{display:grid;grid-template-columns:1.08fr 1fr;gap:90px;align-items:center;padding-block:100px 96px}.hero-copy h1{white-space:pre-line;font-size:56px;line-height:1.23;letter-spacing:-.05em}.hero-copy .lead{max-width:540px;margin-block:24px 32px}.hero-actions{display:flex;align-items:center;gap:25px;flex-wrap:wrap}.hero-small{margin-top:24px;font-size:12px}.hero-preview{background:var(--surface-deep);border:1px solid var(--line);border-radius:16px;padding:32px}.hero-preview h2{font-size:24px}.hero-preview .eyebrow{margin-bottom:8px}.preview-amount{display:flex;align-items:baseline;gap:14px;margin-block:26px 22px;color:var(--mint)}.preview-amount span:first-child{font-size:64px;font-weight:550;line-height:1;letter-spacing:-.055em}.preview-amount span:last-child{font-size:20px}.preview-split{display:grid;grid-template-columns:1fr 1fr;border-block:1px solid var(--line);padding:22px 0;gap:18px}.preview-split>div{display:grid;grid-template-columns:24px 1fr;column-gap:10px}.preview-split span{color:var(--muted);font-size:13px}.preview-split strong{grid-column:2;font-size:25px}.preview-split>div+div{border-left:1px solid var(--line);padding-left:22px}.preview-receipt{display:flex;align-items:center;gap:16px;padding:24px 0}.preview-receipt>.icon:first-child{width:38px;height:38px;filter:invert(78%) sepia(83%) saturate(398%) hue-rotate(338deg)}.preview-receipt>.icon:last-child{margin-left:auto}.preview-receipt strong{display:block;color:var(--mint);font-size:30px;letter-spacing:-.04em}.section{padding-block:56px 70px;border-top:1px solid var(--line)}.section-head{display:flex;justify-content:space-between;align-items:center;gap:30px;margin-bottom:30px}.section-head h2{margin-bottom:10px}.section-head .eyebrow{margin-bottom:12px}.progress-summary{font-size:18px;color:var(--mint);border:1px solid var(--line);padding:8px 15px;border-radius:8px;white-space:nowrap}.lesson-list{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.lesson-card{padding:26px 26px 0;border:1px solid var(--line);border-radius:12px;background:var(--surface-deep);transition:border-color .2s,transform .2s}.lesson-card:hover{border-color:#629788;transform:translateY(-3px)}.lesson-card-top{display:flex;align-items:center;gap:12px;margin-bottom:26px}.lesson-number{font-size:14px;color:var(--muted);font-variant-numeric:tabular-nums}.lesson-card-top .icon{width:24px;height:24px}.lesson-status{margin-left:auto;font-size:11px;color:var(--muted);border:1px solid var(--line);padding:2px 8px;border-radius:20px}.lesson-status.done{color:var(--mint);border-color:#3a6259}.lesson-card h3{font-size:23px;margin-bottom:10px}.lesson-card>p{font-size:14px;color:var(--muted)}.lesson-card ul{margin:22px 0 28px;font-size:13px;color:#bcc7d1}.lesson-card li{display:flex;align-items:center;gap:9px;margin-top:10px}.lesson-card li .icon{width:15px;height:15px}.lesson-card-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding:18px 0;font-size:13px}.lesson-card-bottom span{display:flex;align-items:center;gap:7px}.lesson-card-bottom .icon{width:17px;height:17px}.how-section{padding-block:70px 90px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1.65fr;gap:60px}.how-section h2{white-space:pre-line;font-size:31px}.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}.how-grid h3{margin-block:15px 8px;font-size:17px}.how-grid p{font-size:14px;color:var(--muted)}.page-top{padding-block:70px 100px;min-height:calc(100vh - 260px)}.page-top h1{max-width:820px}.page-top .lead{margin-bottom:48px}.progress-line{display:flex;justify-content:space-between;align-items:center;font-size:14px;color:var(--muted);margin-bottom:20px}.progress-line strong{color:var(--mint)}
.practice-wrap{padding-top:22px}.practice-context{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px;font-size:12px;color:var(--muted)}.practice-context .text-link{font-size:12px}.dot-separator{margin:0 10px}.workspace{display:grid;grid-template-columns:minmax(0,1.68fr) minmax(350px,1fr);gap:32px;align-items:stretch}.practice-heading h1{font-size:36px;letter-spacing:-.04em}.practice-heading p{font-size:17px;color:var(--muted);margin-top:10px;max-width:720px}.stepper{list-style:none;padding:0;display:flex;justify-content:space-between;gap:14px;margin:32px 0 24px}.stepper li{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;white-space:nowrap}.stepper li>span{display:grid;place-items:center;width:26px;height:26px;border:1px solid #687786;border-radius:50%;font-size:14px;flex:none}.stepper li.active{color:var(--mint)}.stepper li.active>span{border-color:var(--mint);background:#88dfc70a}.stepper li.done{color:var(--mint)}.flow-panel{background:var(--surface-deep);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px 22px;min-height:424px;display:flex;flex-direction:column;align-items:center}.flow-balance{display:flex;gap:20px;align-items:center;margin-bottom:24px}.flow-balance>.icon{width:40px;height:40px}.flow-balance span,.flow-node div>span{font-size:15px;color:#bdc8d3;display:block}.flow-balance strong{font-size:30px;color:var(--mint);line-height:1.4;font-weight:550}.flow-node{display:flex;align-items:center;gap:16px;padding:16px 20px;background:#142629;border:1px solid #435b60;border-radius:8px}.flow-node>.icon{width:36px;height:36px}.flow-node strong{display:block;color:var(--mint);font-size:28px;line-height:1.4;font-weight:550;letter-spacing:-.025em;font-variant-numeric:tabular-nums}.flow-node strong.amber{color:var(--amber)}.flow-input{width:70%;padding:14px 20px}.flow-arrow{height:28px;display:flex;align-items:center;justify-content:center}.flow-arrow .icon{width:20px;height:24px}.flow-split{display:grid;grid-template-columns:1fr 1.18fr;width:100%;gap:22px}.fee-node{background:#202524}.fee-node>.icon,.receipt-node>.icon{filter:invert(77%) sepia(72%) saturate(402%) hue-rotate(338deg) brightness(101%) contrast(91%)}.receipt-node{min-width:65%;padding:14px 20px}.order-panel{background:var(--surface-deep);border:1px solid var(--line);border-radius:var(--radius);padding:30px;display:flex;flex-direction:column;justify-content:center}.order-panel h2{font-size:29px}.pair{font-size:20px;letter-spacing:.015em;color:var(--muted);margin-top:3px}.order-tabs{display:flex;border-bottom:1px solid var(--line);margin:26px 0 28px;gap:20px}.order-tab{border:0;background:none;color:var(--muted);font-size:18px;display:flex;align-items:center;justify-content:center;gap:8px;flex:1;padding:12px 0;border-bottom:3px solid transparent;margin-bottom:-1px}.order-tab.active{color:var(--mint);border-bottom-color:var(--mint)}.order-tab .icon{height:16px;width:16px}.order-panel label{display:block;font-size:14px;color:var(--muted);margin-bottom:10px}.amount-input{display:flex;align-items:center;border:1px solid #526171;background:#101b27;border-radius:8px;padding:10px 14px;gap:12px;min-height:76px}.amount-input:focus-within{border-color:var(--mint);outline:2px solid var(--mint);outline-offset:2px}.amount-input input{width:100%;min-width:0;border:0;background:none;padding:0;outline:0!important;font-size:32px;font-weight:550;line-height:1.2;border-radius:0;letter-spacing:-.035em}.amount-input>span{font-size:14px;color:var(--muted)}.amount-input>button{border:0;background:none;font-size:14px;color:var(--mint);padding:5px 0;white-space:nowrap}.amount-presets{display:flex;gap:8px;margin-top:10px}.amount-presets button{background:none;border:1px solid var(--line);border-radius:5px;flex:1;padding:5px;color:var(--muted);font-size:12px}.amount-presets button:hover,.amount-presets button.selected{border-color:#638b80;color:var(--mint);background:#88dfc708}.field-help{font-size:11px;color:var(--muted);line-height:1.65;margin-top:8px}.order-summary{margin-block:24px 20px;border:1px solid var(--line);border-radius:8px;padding-inline:16px}.order-summary>div{display:flex;justify-content:space-between;align-items:center;gap:14px;padding-block:14px;font-size:14px}.order-summary>div+div{border-top:1px solid var(--line)}.order-summary>div>span{color:var(--muted)}.order-summary strong{font-size:14px;white-space:nowrap}.fee-info .icon{width:16px;height:16px;filter:invert(.65)}.order-panel .primary{min-height:58px;font-size:17px}.order-panel .tiny{margin-top:14px}.field-error{font-size:13px;color:var(--red);margin-bottom:12px;line-height:1.5}.field-error:empty{display:none}.coach{display:flex;gap:22px;align-items:center;background:var(--amber-bg);border:1px solid #4d3e24;border-radius:10px;padding:19px 25px;margin-top:24px}.coach>.icon{width:40px;height:40px;filter:invert(80%) sepia(55%) saturate(560%) hue-rotate(342deg)}.coach h3{color:var(--amber);font-size:19px;margin-bottom:5px}.coach p{font-size:15px;color:#c9c5bc;line-height:1.7}.coach.error{background:#261b1d;border-color:#70413a}.coach.error h3{color:var(--red)}.coach.success{background:#10251f;border-color:#335f50}.coach.success h3{color:var(--mint)}.practice-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:16px;font-size:12px;color:var(--muted)}.practice-bottom>span{display:flex;align-items:center;gap:7px}.practice-bottom .icon{width:16px;height:16px}.practice-bottom .text-link{font-size:12px}.text-input{width:100%;padding:12px 14px;font-size:19px}.market-strip{display:flex;justify-content:space-between;gap:16px;width:100%;border-top:1px solid var(--line);margin-top:20px;padding-top:16px;font-size:11px;color:var(--muted)}.market-strip strong{display:block;color:var(--text);font-size:17px}.market-strip>span:last-child{text-align:right}#limit-field{margin-top:20px}.stage-icon{display:block;margin-bottom:20px}.stage-icon .icon{width:44px;height:44px}.stage-icon.amber .icon{filter:invert(82%) sepia(71%) saturate(450%) hue-rotate(332deg)}.order-panel [tabindex="-1"]:focus{outline:none}.order-panel [tabindex="-1"]>p{margin-top:14px}.review-details{margin:28px 0}.review-details>div{display:flex;justify-content:space-between;gap:18px;padding:13px 0;border-bottom:1px solid var(--line);font-size:14px}.review-details dt{color:var(--muted)}.review-details dd{margin:0;text-align:right;font-weight:550}.waiting-price{margin-block:28px;border-block:1px solid var(--line);padding:24px 0}.waiting-price span{display:block;color:var(--muted);font-size:13px}.waiting-price strong{font-size:30px;color:var(--amber)}.result-receipt{margin:20px 0;padding:20px 0;border-block:1px solid var(--line)}.result-receipt>span{display:block;font-size:13px;color:var(--muted)}.result-receipt strong{font-size:27px;color:var(--mint);letter-spacing:-.03em}.result-learnings{font-size:13px;color:#bcc7d1;margin:22px 0}.result-learnings li{display:flex;gap:9px;margin-block:10px}.result-learnings .icon{width:17px;height:17px}.order-panel #result-title{font-size:25px}.order-panel #result-stage .eyebrow{margin:0 0 10px}.network-flow{display:flex;gap:24px;align-items:center;justify-content:center;width:100%;padding:10px 0 28px}.network-endpoint{display:flex;flex-direction:column;align-items:center;gap:5px;flex:1;text-align:center}.network-endpoint>span{font-size:13px;color:var(--muted)}.network-endpoint strong{font-size:27px}.network-endpoint>.network-label{font-size:12px;color:var(--text);border:1px solid var(--line);padding:5px 10px;border-radius:5px}.network-endpoint>.network-label.mint{color:var(--mint);border-color:#416058}.round-icon{margin-bottom:10px}.round-icon .icon{width:38px;height:38px}.network-status{display:flex;gap:9px;align-items:center;justify-content:center;border-block:1px solid var(--line);width:100%;padding:18px 0;font-size:13px;color:var(--muted)}.network-summary{width:100%;margin:14px 0}.network-summary>div{display:flex;justify-content:space-between;gap:20px;font-size:14px;padding:8px 0}.network-summary span{color:var(--muted)}.fixed-network{display:flex;align-items:center;gap:10px;border:1px solid var(--line);padding:14px;border-radius:8px;margin-bottom:26px;font-size:15px}.fixed-network .icon{width:18px;height:18px}.order-panel select{width:100%;padding:15px 12px}.order-panel #network{margin-bottom:18px}.order-panel .pair+form>label{margin-top:30px}.feedback{border:1px solid var(--line);border-radius:10px;max-width:650px;margin:32px auto 0;padding:24px}.feedback h3{font-size:18px;margin-bottom:16px}.rating-options{display:flex;gap:12px;border:0;padding:0;margin:0 0 14px}.rating-options label{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:7px;padding:8px 12px;font-size:13px;cursor:pointer}.rating-options label:has(input:checked){border-color:var(--mint);background:var(--mint-dark)}.rating-options input{accent-color:var(--mint)}.rating-options .icon{width:18px;height:18px}.feedback textarea{display:block;width:100%;resize:vertical;min-height:80px;padding:12px;font-size:14px;margin-bottom:14px}.feedback p{font-size:13px;color:var(--mint);margin-block:10px}.lesson-reading{padding-block:70px;border-top:1px solid var(--line);margin-top:55px}.reading-header h2{max-width:760px;font-size:27px}.reading-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;margin-block:30px}.reading-grid h3{font-size:18px;margin-bottom:12px}.reading-grid p{font-size:14px;color:var(--muted)}.noscript{padding:16px;border:1px solid var(--amber);color:var(--amber);margin-top:16px}
.article{max-width:820px;padding-block:65px 90px;min-height:calc(100vh - 240px)}.article>.text-link{margin-bottom:35px}.article h1{font-size:43px}.article>.eyebrow{margin-top:12px}.article>section{margin-top:36px}.article section h2{font-size:24px;margin-bottom:16px}.article section p{color:#b5c0cc;font-size:16px;line-height:1.9}.article>.button{margin-top:36px}.article>.tiny{margin-top:20px}.takeaway{display:flex;gap:18px;border-left:3px solid var(--mint);background:#11231f;padding:22px 25px;margin-block:32px}.takeaway>.icon{margin-top:4px}.takeaway p{color:#c0d3cb;margin-top:7px;font-size:15px}.takeaway>p{margin:0}.guide-list{margin-top:40px}.guide-row{display:flex;align-items:center;gap:32px;border-top:1px solid var(--line);padding-block:30px}.guide-row:last-child{border-bottom:1px solid var(--line)}.guide-row h2{font-size:25px}.guide-row p{font-size:15px;color:var(--muted);margin-top:8px}.guide-row>.icon{margin-left:auto;flex:none}.guide-row:hover h2{color:var(--mint)}.faq details{border-bottom:1px solid var(--line);padding:16px 0}.faq summary{cursor:pointer;font-weight:550;padding:5px 0}.faq details p{margin-top:15px}.partners{padding:26px;border:1px solid var(--line);border-radius:12px}.partners label{display:block;margin-block:20px 10px}.partners select{width:100%;padding:12px}.partner-link{margin-top:14px;width:100%}.partners .small{margin-top:18px}.empty-page{padding-block:120px;min-height:65vh}.empty-page p{margin:20px 0 30px;color:var(--muted)}.footer{padding-block:30px;border-top:1px solid var(--line)}.footer-top{display:flex;align-items:center;justify-content:space-between;gap:25px}.footer-top .brand-name{font-size:23px}.footer-top>span{color:var(--muted);font-size:12px}.footer nav{display:flex;gap:22px;font-size:12px;color:var(--muted)}.footer a:hover{color:var(--mint)}.footer>.tiny{margin-top:18px;font-size:11px}.receipt-delete{display:flex;align-items:center;gap:16px;margin-top:14px;font-size:13px}
@media(min-width:1550px){.practice-wrap{padding-top:30px}.flow-panel{min-height:440px}.workspace{gap:40px}}
@media(max-width:1150px){.wrap,.header-inner{width:calc(100% - 48px)}.header-inner{gap:20px}.brand-sub,.brand-divider{display:none}.desktop-nav{margin-left:5px;gap:20px}.header-actions{gap:14px}.home-hero{gap:40px}.hero-copy h1{font-size:45px}.workspace{grid-template-columns:minmax(0,1.4fr) minmax(310px,1fr);gap:22px}.practice-heading h1{font-size:30px}.practice-heading p{font-size:15px}.stepper{gap:6px}.stepper li{font-size:11px;gap:5px}.stepper li>span{width:23px;height:23px;font-size:12px}.flow-panel{padding:24px 18px}.flow-node{padding:14px 12px;gap:10px}.flow-node strong{font-size:23px}.flow-node div>span{font-size:13px}.flow-node>.icon{width:28px;height:28px}.order-panel{padding:24px}.flow-split{gap:12px}.how-section{grid-template-columns:1fr;gap:35px}.lesson-card{padding:22px 20px 0}.lesson-card h3{font-size:20px}.sim-badge{font-size:11px}.order-panel h2{font-size:26px}.order-summary{padding-inline:12px}.order-summary strong,.order-summary>div{font-size:12px}.network-flow{gap:12px}.network-endpoint>.network-label{font-size:10px;padding:5px}.network-summary>div{font-size:12px}}
@media(max-width:800px){.header{height:68px}.header-inner{width:calc(100% - 36px)}.brand-name{font-size:26px}.desktop-nav{display:none}.menu-toggle{display:block}.sim-badge{display:none}.header-actions{gap:18px}.mobile-nav{top:67px}.wrap{width:calc(100% - 36px)}h1{font-size:34px}.home-hero{grid-template-columns:1fr;padding-block:56px;gap:40px}.hero-copy h1{font-size:43px}.hero-copy .lead{font-size:17px}.hero-preview{max-width:550px;width:100%;padding:28px}.section{padding-block:40px 50px}.section-head{align-items:flex-start}.section-head h2{font-size:26px}.section-head .muted{font-size:14px}.lesson-list{grid-template-columns:1fr}.lesson-card{padding:24px 24px 0}.lesson-card-top{margin-bottom:18px}.lesson-card h3{font-size:24px}.lesson-card ul{margin:18px 0 24px}.lesson-card li{font-size:14px}.how-section{padding-block:44px}.how-grid{gap:24px}.how-section h2{font-size:29px}.workspace{grid-template-columns:1fr;gap:20px}.practice-heading h1{font-size:32px}.practice-heading p{font-size:16px}.stepper{margin-block:25px 20px;gap:10px}.stepper li{font-size:12px}.flow-panel{min-height:0;padding:22px}.flow-node strong{font-size:28px}.flow-input{width:70%}.flow-node{padding:14px 20px;gap:16px}.flow-node>.icon{width:34px;height:34px}.flow-balance{margin-bottom:18px}.order-panel{padding:25px}.order-panel h2{font-size:27px}.order-tabs{margin-block:20px}.order-summary>div,.order-summary strong{font-size:15px}.coach{padding:20px;gap:15px}.coach>.icon{width:28px;height:28px}.coach h3{font-size:17px}.coach p{font-size:14px}.reading-grid{grid-template-columns:1fr;gap:25px}.reading-header h2{font-size:25px}.lesson-reading{padding-block:40px;margin-top:35px}.page-top{padding-block:45px 60px}.page-top h1{font-size:35px}.page-top .lead{font-size:16px;margin-bottom:30px}.how-grid{grid-template-columns:1fr}.how-grid>div{display:grid;grid-template-columns:28px 1fr;column-gap:16px}.how-grid h3{margin:0 0 8px}.how-grid p{grid-column:2}.footer-top{flex-wrap:wrap;gap:16px}.footer-top>span{flex:1;text-align:right;font-size:10px}.footer nav{width:100%;gap:24px}.article{padding-block:42px 65px}.article h1{font-size:34px}.article .lead{font-size:17px}.guide-row{gap:18px}.guide-row h2{font-size:22px}.guide-row p{font-size:14px}.article section h2{font-size:22px}.network-flow{padding-bottom:22px}.network-endpoint>.network-label{font-size:12px}.network-summary>div{font-size:14px}.feedback{padding:20px}.order-panel .primary{font-size:16px}.market-strip{font-size:12px}}
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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
/* Approved visual: white canvas, cobalt actions, mission rail. */
:root{color-scheme:light;--bg:#fff;--surface:#f7f9fd;--surface-deep:#fff;--line:#e4e8ef;--text:#151b28;--muted:#727b8c;--mint:#2455f5;--mint-hover:#1745dc;--mint-dark:#edf2ff;--amber:#b07313;--amber-bg:#fff8e9;--red:#be3f36}
.icon{filter:invert(30%) sepia(94%) saturate(3170%) hue-rotate(220deg) brightness(96%) contrast(101%)}.primary{color:#fff}.primary .icon{filter:brightness(0) invert(1)}.secondary{background:#fff;border-color:var(--mint);color:var(--mint)}.secondary:hover{background:#eff3ff}.quiet:hover{background:#f4f6fc}.muted{color:var(--muted)}.green{color:#43a52d!important}.header{height:76px}.header-inner{gap:0}.brand{gap:12px}.brand>.icon{width:32px;height:32px}.brand-name{font-size:31px}.brand-divider{margin-left:22px;margin-right:20px;background:#d9dfe8}.brand-sub{font-size:19px;color:#515b6c}.desktop-nav{margin-left:45px;gap:28px}.header-actions{gap:22px}.sim-badge{background:none;border:0;border-radius:0;color:var(--mint);font-size:15px;padding:0}.language-switch{color:#566173}.language-switch .icon{filter:invert(45%)}.header .mobile-nav{top:75px}.hero-preview{background:#f9fbff;border-color:#dbe4fa}.preview-split span{color:var(--muted)}.preview-split strong{color:var(--text)}.preview-receipt>.icon:first-child{filter:invert(61%) sepia(97%) saturate(2370%) hue-rotate(359deg)}.hero-copy h1{font-weight:700}.lesson-card{background:#fff}.lesson-card:hover{border-color:#9db3ff;box-shadow:0 10px 30px #173b8710}.lesson-card li{color:#556074}.lesson-status.done{border-color:#bfd6b8;color:#378d27}.how-grid p{color:#687285}.footer-top>span{color:#747e90}.takeaway{background:#eff4ff;border-left-color:var(--mint)}.takeaway p{color:#4e5c78}.article section p{color:#586376}.partners .small{color:#717c90}.feedback textarea{background:#fff}.rating-options label:has(input:checked){background:#edf2ff}.result-learnings{color:#566074}.noscript{background:#fff8e9}.empty-page{color:var(--text)}
.practice-wrap{padding-top:38px}.practice-page-head{display:flex;align-items:flex-start;justify-content:space-between;gap:50px;margin-bottom:40px}.practice-heading h1{font-size:43px;font-weight:750;line-height:1.3;letter-spacing:-.04em}.practice-heading p{margin-top:14px;font-size:22px;color:#677182}.challenge-progress{width:310px;flex:none;padding-top:2px}.challenge-progress>div{display:flex;align-items:baseline;gap:20px}.challenge-progress strong{color:var(--mint);font-size:39px;font-weight:600;line-height:1.1}.challenge-progress>div>span{font-size:22px;color:#647083}.challenge-progress .stepper{display:flex;gap:6px;margin:15px 0 0;padding:0}.challenge-progress .stepper li{height:8px;background:#e9edf3;border-radius:8px;flex:1;display:block}.challenge-progress .stepper li.active,.challenge-progress .stepper li.done{background:var(--mint)}.challenge-progress .stepper li>span{border:0}.workspace{grid-template-columns:minmax(0, .51fr) minmax(0, 1fr);gap:44px;align-items:stretch}.workspace-left{padding-right:2px;display:flex;flex-direction:column;padding-top:24px}.workspace-left>.eyebrow{font-size:16px;font-weight:650;margin-bottom:14px;letter-spacing:0}.task-heading{font-size:27px;font-weight:650;letter-spacing:-.03em;line-height:1.45}.task-checklist{list-style:none;padding:0;margin:22px 0 30px;display:flex;flex-direction:column;gap:12px}.task-checklist li{display:flex;align-items:center;gap:18px;min-height:66px;border:1px solid #dfe4ec;border-radius:10px;padding:12px 18px;font-size:17px;color:#252c39}.task-checklist .icon{width:34px;height:34px;filter:invert(92%) sepia(5%) saturate(428%) hue-rotate(178deg)}.task-checklist .done .icon{filter:invert(56%) sepia(73%) saturate(368%) hue-rotate(62deg)}.coach{margin:0;padding:22px 19px;align-items:flex-start;gap:17px;background:#edf2ff;border:1px solid #6484ff;border-radius:10px}.coach>.icon{width:54px;height:54px;padding:11px;background:var(--mint);border-radius:50%;filter:none;object-fit:contain;/* icon uses inverted asset generated from library */}.coach h3{color:var(--mint);font-size:20px;font-weight:650;margin-bottom:10px;line-height:1.45}.coach p{color:#515c72;font-size:18px;line-height:1.7}.coach.error{background:#fff3f1;border-color:#e9aaa2}.coach.error h3{color:#b2352b}.coach.success{background:#f0f8ed;border-color:#94be88}.coach.success h3{color:#378b2d}.task-footnote{margin-top:auto;padding-top:34px;color:#8c95a4;font-size:12px;line-height:1.9}.task-network{margin-top:22px;font-size:12px;color:var(--muted);line-height:1.8}.task-network>span{display:block}.task-network #network-status{margin-top:10px}.task-network strong{color:var(--text)}.order-panel{border:0;border-left:1px solid var(--line);border-radius:0;padding:0 0 0 44px;justify-content:flex-start;background:#fff}.order-eyebrow{font-size:14px;color:#838c9c;line-height:1.5;margin-bottom:20px}.order-panel .asset-heading{display:flex;align-items:center;gap:14px;font-size:34px;font-weight:650;margin-bottom:24px}.asset-heading>.icon{width:47px;height:47px;filter:invert(58%) sepia(95%) saturate(1729%) hue-rotate(359deg) brightness(103%) contrast(101%)}.asset-heading small{font-size:17px;color:#727c8f;font-weight:400;margin-left:4px}.amount-input{min-height:94px;padding:8px 24px;border:1.5px solid #3866ff;background:#fff;border-radius:12px;gap:20px}.amount-input input{font-size:64px;font-weight:600;color:var(--mint);letter-spacing:-.05em;line-height:1.12}.amount-input>span{font-size:28px;font-weight:650;color:var(--mint)}.amount-presets{gap:16px;margin-top:16px}.amount-presets button{background:#edf2ff;border:1px solid transparent;color:#252d3d;font-size:17px;min-height:46px;border-radius:7px;padding:6px}.amount-presets 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var(--line);padding-left:44px;color:#6f798c;min-height:62px;font-size:22px}.practice-next>a>.icon:first-child{width:44px;height:44px}.practice-next>a>.icon:last-child{margin-left:auto}.practice-next>a:hover{color:var(--mint)}.lesson-reading{margin-top:65px}.order-tabs{margin-top:0}.order-tab.active{color:var(--mint)}.market-strip{font-size:13px;color:#7c8696;margin:18px 0 0}.market-strip strong{color:#303b4f;font-size:21px}.text-input{background:#fff;border-color:#c9d2e2;color:#25304a}.order-panel label:not(.sr-only){font-size:15px;color:#747e8f}.order-panel .fixed-network{background:#f6f8fc;border-color:#e0e6f0;color:#405071}.order-panel select{background:#fff;border-color:#6b8afa;font-size:18px}.stage-icon .icon{filter:invert(29%) sepia(88%) saturate(3233%) hue-rotate(221deg)}.order-panel [tabindex="-1"] h2{font-size:33px}.order-panel [tabindex="-1"]>p{font-size:16px}.review-details{margin-block:30px}.review-details>div{font-size:18px;padding-block:16px}.result-receipt{padding:26px 0}.result-receipt strong{font-size:40px}.result-learnings{font-size:16px}.result-learnings li{margin-block:14px}.order-panel #result-title{font-size:33px}.order-panel #result-stage .eyebrow{margin-top:16px}.order-panel .quiet{margin-top:10px}.waiting-price{padding-block:30px}.waiting-price strong{color:var(--mint);font-size:38px}.feedback{background:#f9fbff}.feedback textarea{border-color:#c9d2e2}.rating-options label{background:#fff}.footer{margin-top:20px}.article .takeaway>div>strong{color:var(--mint)}
@media(min-width:1550px){.wrap,.header-inner{max-width:1440px}.workspace{gap:50px}.order-panel{padding-left:50px}.practice-wrap{padding-top:42px}.practice-page-head{margin-bottom:48px}.practice-heading h1{font-size:46px}.task-checklist li{min-height:72px}.coach{padding:24px}.practice-next{gap:50px}.practice-next>a{padding-left:50px}}
@media(max-width:1150px){.brand-sub,.brand-divider{display:inline}.brand-divider{margin-left:12px;margin-right:8px}.brand-sub{font-size:16px}.desktop-nav{margin-left:25px}.sim-badge{font-size:13px}.practice-page-head{gap:25px}.practice-heading h1{font-size:34px}.practice-heading p{font-size:18px}.challenge-progress{width:240px}.workspace{grid-template-columns:minmax(0,.53fr) minmax(0,1fr);gap:28px}.order-panel{padding-left:28px}.task-heading{font-size:22px}.task-checklist li{padding:12px;gap:12px;font-size:14px}.coach{padding:17px;gap:12px}.coach>.icon{width:38px;height:38px;padding:8px}.coach h3{font-size:17px}.coach p{font-size:15px}.amount-input{min-height:86px}.amount-input input{font-size:54px}.amount-input>span{font-size:24px}.cost-equation{gap:10px;grid-template-columns:1fr 18px .8fr 18px 1fr}.cost-equation strong{font-size:32px}.cost-equation>div>span{font-size:13px}.receipt-line>strong{font-size:37px}.receipt-line>span{font-size:17px}.receipt-line small{font-size:20px}.practice-next{grid-template-columns:minmax(0,.53fr) minmax(0,1fr);gap:28px}.practice-next>a{padding-left:28px;font-size:18px}.order-panel .primary{font-size:16px}.order-panel .asset-heading{font-size:30px}.asset-heading>.icon{width:40px;height:40px}.order-panel #reset-practice{font-size:17px}.order-panel [tabindex="-1"] h2{font-size:27px}.result-receipt strong{font-size:32px}.result-learnings{font-size:14px}}
@media(max-width:800px){.header{height:68px}.header .mobile-nav{top:67px}.header-inner{gap:0}.brand-sub{font-size:15px}.brand-divider{height:20px;margin-left:9px;margin-right:5px}.brand-name{font-size:25px}.brand>.icon{width:25px;height:25px}.brand{gap:8px}.header-actions{gap:14px}.sim-badge{display:none}.practice-wrap{padding-top:28px}.practice-page-head{display:block;margin-bottom:28px}.practice-heading h1{font-size:33px}.practice-heading p{font-size:17px;margin-top:12px}.challenge-progress{width:100%;display:flex;align-items:center;gap:20px;margin-top:20px;padding:0}.challenge-progress>div{gap:9px;white-space:nowrap}.challenge-progress strong{font-size:24px}.challenge-progress>div>span{font-size:15px}.challenge-progress .stepper{flex:1;margin:0;gap:5px}.challenge-progress .stepper li{height:6px}.workspace{grid-template-columns:1fr;gap:26px}.workspace-left{padding:0}.workspace-left>.eyebrow{font-size:12px;margin-bottom:7px}.task-heading{font-size:22px}.task-checklist{flex-direction:row;gap:8px;margin:16px 0}.task-checklist li{flex:1;min-width:0;flex-direction:column;align-items:flex-start;gap:8px;font-size:12px;padding:12px;min-height:85px;line-height:1.5}.task-checklist .icon{width:24px;height:24px}.coach{padding:16px;gap:12px}.coach>.icon{width:36px;height:36px;padding:8px}.coach h3{font-size:16px;margin-bottom:5px}.coach p{font-size:14px;line-height:1.7}.task-footnote{display:none}.order-panel{border-left:0;border-top:1px solid var(--line);padding:24px 0 0}.order-eyebrow{font-size:12px;margin-bottom:13px}.order-panel .asset-heading{font-size:29px;margin-bottom:18px}.asset-heading small{font-size:16px}.amount-input{min-height:82px;padding:10px 20px}.amount-input input{font-size:48px}.amount-input>span{font-size:23px}.amount-presets{gap:10px;margin-top:12px}.amount-presets button{min-height:42px;font-size:15px}.field-help{font-size:11px}.cost-equation{gap:10px;margin-block:23px 18px}.cost-equation strong{font-size:32px}.cost-equation>div>span{font-size:12px}.receipt-line{padding-block:17px 21px}.receipt-line>strong{font-size:37px}.receipt-line>span{font-size:16px}.receipt-line small{font-size:19px;margin-left:4px}.order-panel .primary{font-size:16px;height:54px;min-height:54px}.order-panel .primary>.icon{right:15px;width:21px;height:21px}.order-panel #reset-practice{font-size:16px;height:48px;min-height:48px;margin-top:12px}.practice-next{display:block;margin-top:25px}.next-note{font-size:10px;margin-bottom:16px}.practice-next>a{border:0;border-top:1px solid var(--line);padding:20px 0 0;font-size:16px;gap:13px}.practice-next>a>.icon:first-child{width:28px;height:28px}.practice-next>a>.icon:last-child{width:20px;height:20px}.lesson-reading{margin-top:36px}.order-panel #result-title{font-size:29px}.review-details>div{font-size:16px}.result-learnings{font-size:14px}.result-receipt strong{font-size:35px}.stage-icon .icon{width:38px;height:38px}.task-network{display:none}}
@media(max-width:430px){.brand-sub{font-size:13px}.brand-divider{margin-inline:3px}.brand-name{font-size:23px}.brand>.icon{width:24px;height:24px}.header-actions{gap:10px}.language-switch{font-size:12px;gap:4px}.language-switch .icon{width:15px;height:15px}.icon-button{width:34px;height:36px}.practice-heading h1{font-size:28px;line-height:1.4}.practice-heading p{font-size:15px}.task-heading{font-size:21px}.task-checklist li{font-size:11px;padding:10px}.cost-equation{grid-template-columns:1fr 12px .8fr 12px 1fr;gap:8px}.cost-equation strong{font-size:29px}.cost-equation>div>span{font-size:10px}.cost-equation .operator{font-size:21px}.receipt-line>strong{font-size:30px}.receipt-line>span{font-size:14px}.receipt-line small{font-size:17px}.amount-input input{font-size:48px}.order-panel .primary{font-size:15px;padding-inline:28px}.order-panel .primary>.icon{width:18px;height:18px;right:10px}.coach h3{font-size:16px}.coach p{font-size:13px}.practice-next>a{font-size:14px}.result-receipt strong{font-size:29px}}
/* Small text remains readable on the light canvas. */
:root{--muted:#687386}.order-eyebrow,.field-help,.task-footnote,.next-note,.footer-top>span{color:#687386}.cost-equation>div>span{color:#687386}.receipt-line>span{color:#687386}

@media(max-width:360px){.brand-sub,.brand-divider{display:none}.language-switch{white-space:nowrap;flex-shrink:0}.header-actions{flex-shrink:0}}

/* Desktop proportions follow the selected white-blue reference. */
@media(min-width:1151px) and (max-width:1549px){.practice-page-head{margin-bottom:20px}.workspace,.practice-next{grid-template-columns:minmax(0,.47fr) minmax(0,1fr)}.practice-heading h1{font-size:46px}.task-heading{font-size:29px}.task-checklist li{font-size:19px}.task-checklist .icon{width:36px;height:36px}.amount-input input{font-size:70px}.receipt-line>strong{font-size:52px}.coach p{font-size:21px}}

/* Shared custom dropdowns: language, network and country. */
.language-menu,.custom-select{position:relative}
.language-menu{flex-shrink:0;border:0;margin:0;padding:0}
.language-menu>summary.language-switch{display:flex;align-items:center;gap:8px;list-style:none;cursor:pointer;padding:9px 11px;border:0;border-radius:4px;background:transparent;color:#4b5870;font-size:13px;white-space:nowrap;line-height:1.5}
.language-menu>summary::-webkit-details-marker{display:none}
.language-switch>.icon{width:16px;height:16px;flex-shrink:0}
.language-menu[open]>summary,.language-menu>summary:hover{background:transparent;color:#2455f5}
.language-menu[open]>summary>.icon:last-child{transform:rotate(180deg)}
.dropdown-panel{position:absolute;z-index:100;top:calc(100% + 7px);left:0;min-width:100%;padding:6px;border:1px solid #dfe6f2;border-radius:10px;background:#fff;box-shadow:0 8px 30px #2639571a;color:#26334b}
.language-options{right:0;left:auto;width:180px}
.dropdown-option{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;min-height:44px;padding:10px 12px;border:0;border-radius:6px;background:transparent;color:#33425c;font-size:14px;text-align:left;white-space:nowrap;line-height:1.5}
.dropdown-option>.icon{width:17px;height:17px}
.dropdown-option:hover,.dropdown-option.highlighted{background:#edf2ff;color:#2455f5}
.dropdown-option[aria-current=true],.dropdown-option[aria-selected=true]{background:#edf2ff;color:#2455f5;font-weight:600}
.custom-select{margin:8px 0 18px;width:100%;isolation:isolate;z-index:2}
.custom-select:has([aria-expanded=true]){z-index:20}
.select-trigger{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;min-height:52px;padding:12px 16px;border:1px solid #bdcbea;border-radius:8px;background:#fff;color:#25304a;font-size:17px;text-align:left}
.select-trigger:hover,.select-trigger[aria-expanded=true]{border-color:#2455f5;background:#f9fbff}
.select-trigger[aria-invalid=true]{border-color:#c4483c}
.select-trigger .dropdown-arrow{width:18px;height:18px;flex-shrink:0}
.select-trigger[aria-expanded=true] .dropdown-arrow{transform:rotate(180deg)}
.select-options{max-height:240px;overflow-y:auto;overscroll-behavior:contain}
.select-options .dropdown-option{font-size:16px}
@media(max-width:800px){.header .brand-sub,.header .brand-divider{display:none}.language-menu>summary.language-switch{padding:8px;gap:5px;font-size:12px}.language-switch>.icon{width:14px;height:14px}.language-switch>.icon:first-child{display:none}.select-trigger{font-size:16px}.select-options .dropdown-option{font-size:15px}}

.fee-reference{margin:48px 0;padding-top:28px;border-top:1px solid #e0e6f0}
.fee-reference-heading,.fee-card-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.fee-reference-heading h2{font-size:24px;margin:0}.fee-reference-heading>span{font-size:12px;color:#687386}
.fee-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:22px 0 14px}
.fee-card{padding:22px;border:1px solid #dfe6f2;border-radius:12px;background:#fff}.fee-card h3{font-size:20px;margin:0}
.fee-status{padding:4px 9px;border-radius:6px;font-size:11px;background:#f1f4fa;color:#596880}.fee-status[data-fee-status=fresh]{background:#eaf6ed;color:#327445}.fee-status[data-fee-status=stale]{background:#fff3db;color:#8c610a}
.fee-values{display:flex;gap:36px;margin:18px 0}.fee-values dt{font-size:12px;color:#687386}.fee-values dd{margin:0;color:#2455f5;font-size:26px;font-weight:600}.fee-empty{font-size:14px;color:#687386;min-height:50px;margin:18px 0}
.fee-card .text-link{font-size:13px}.fee-card time{overflow-wrap:anywhere}
#partner-list{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}
@media(max-width:650px){.fee-grid{grid-template-columns:1fr}.fee-reference-heading h2{font-size:21px}.fee-card{padding:18px}}

/* Long-form guides: readable editorial content beside a quiet contents rail. */
.guide-article{padding-top:44px;padding-bottom:80px}.guide-header{max-width:900px;margin-bottom:48px}.guide-header h1{font-size:clamp(32px,4vw,52px);line-height:1.25;letter-spacing:-.035em;margin:18px 0}.guide-header .eyebrow{margin-top:34px}.guide-layout{display:grid;grid-template-columns:238px minmax(0,760px);gap:64px;justify-content:space-between}.guide-toc nav{position:sticky;top:100px;border-left:2px solid #e7ebf2;padding-left:20px;display:grid;gap:14px}.guide-toc a{color:#667085;font-size:14px;line-height:1.6;text-decoration:none}.guide-toc a:hover{color:#2458ef}.guide-toc strong{font-size:14px;color:#182230;margin-bottom:6px}.guide-body{min-width:0;font-size:17px;line-height:1.95;color:#344054}.guide-intro{font-size:20px;line-height:1.8;color:#182230}.guide-section{margin:48px 0;scroll-margin-top:105px}.guide-section h2{font-size:26px;line-height:1.5;letter-spacing:-.02em;color:#101828;margin-bottom:20px}.guide-section p{margin:16px 0}.guide-section li{padding-left:4px;margin:12px 0}.guide-section ul{padding-left:24px}.citation{font-size:13px;vertical-align:super;margin-left:4px;color:#2458ef;text-decoration:none}.concept-figure{margin:32px 0 44px;padding:28px;border:1px solid #d7e1fd;border-radius:16px;background:#f5f8ff}.concept-figure h2{font-size:24px;margin:5px 0 22px;color:#142c65}.concept-flow{counter-reset:step;list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.concept-flow li{counter-increment:step;background:white;padding:20px 16px;border:1px solid #dfe6f4;border-radius:12px;position:relative}.concept-flow li:before{content:"0" counter(step);display:block;color:#2458ef;font-size:13px;font-weight:750;margin-bottom:12px}.concept-flow strong{display:block;color:#1d3c8c;font-size:19px;line-height:1.5}.concept-flow p{font-size:14px;line-height:1.7;margin:10px 0 0}.concept-flow li+li:after{content:"→";position:absolute;left:-14px;top:45%;color:#2458ef;background:#f5f8ff;line-height:20px}.concept-figure>.small{margin:18px 0 0}.official-figure{margin:40px 0;border:1px solid #e1e6ee;border-radius:12px;overflow:hidden;background:#fafbfc}.official-figure img{display:block;width:100%;height:auto}.official-figure figcaption{padding:18px 22px;font-size:13px;line-height:1.7}.official-figure figcaption p{margin:0 0 8px}.official-figure a{color:#2458ef}.guide-practice{background:#edf3ff;padding:28px;border-radius:14px;margin:48px 0}.guide-practice h2{font-size:23px;color:#142c65;margin:0}.guide-practice p{font-size:15px;margin:12px 0 20px}.guide-references{border-top:1px solid #e6eaf0;padding-top:32px}.guide-references ol{padding-left:22px;font-size:14px;overflow-wrap:anywhere}.guide-references a{color:#2458ef}.guide-references .icon{width:14px;height:14px;margin-left:6px}.related-guides{display:grid;gap:12px}.related-guides a{display:grid;gap:8px;padding:22px;border:1px solid #e2e7ef;border-radius:12px;text-decoration:none}.related-guides strong{color:#2458ef}.related-guides span{font-size:14px;color:#667085;line-height:1.7}.guide-body details p{font-size:16px}.guide-references li{scroll-margin-top:105px}
@media(max-width:900px){.guide-layout{grid-template-columns:1fr;gap:32px}.guide-toc nav{position:static;padding:20px;border:1px solid #e3e8f1;border-radius:12px;gap:10px}.guide-header{margin-bottom:24px}.guide-article{padding-top:24px}.guide-body{font-size:16px}.guide-section{margin:36px 0}}
@media(max-width:520px){.concept-flow{grid-template-columns:1fr;gap:18px}.concept-flow li+li:after{content:"↓";left:50%;top:-20px}.concept-figure{padding:20px}.guide-header h1{font-size:32px}.guide-practice{padding:22px}.guide-practice .button{width:100%}.guide-section h2{font-size:23px}.guide-intro{font-size:18px}}
.detail-diagram{margin:28px 0;padding:24px;border:1px solid #dfe6f4;border-radius:12px;background:#fbfcff}.detail-diagram h3{font-size:19px;margin:0 0 20px;color:#182230}.equation-lane{display:grid;grid-template-columns:55px 1fr;gap:8px;padding:16px 0;border-top:1px solid #e3e8f3;font-size:15px}.equation-lane span{font-size:12px;color:#667085}.equation-lane b{grid-column:2;color:#2458ef}.fill-bar{display:flex;border-radius:8px;overflow:hidden;font-size:14px;font-weight:700}.fill-bar span:first-child{width:30%;background:#2458ef;color:white;padding:10px}.fill-bar span:last-child{width:70%;background:#dce6ff;color:#18397f;padding:10px}.fill-key{display:flex;justify-content:space-between;gap:16px;font-size:14px}.network-lane{display:grid;grid-template-columns:1fr 20px 1fr;gap:8px;font-size:14px;align-items:center;padding:16px;background:#edf6f0;border-radius:8px;margin:12px 0;color:#246440}.network-lane b{grid-column:1/-1;font-size:12px}.network-lane.mismatch{background:#fff3ee;color:#a14327}.detail-diagram .small{margin-bottom:0}@media(max-width:420px){.network-lane{font-size:12px;padding:12px;gap:4px}.detail-diagram{padding:16px}.equation-lane{font-size:13px;grid-template-columns:40px 1fr}}
.guide-toc>details{position:sticky;top:100px;border:0;padding:0}.guide-toc nav{position:static;margin-top:18px}.guide-toc summary{font-size:14px;font-weight:650;color:#182230;cursor:pointer;line-height:1.7}.guide-toc summary::marker{color:#2458ef}@media(max-width:900px){.guide-toc>details{position:static;padding:16px 20px;border:1px solid #e3e8f1;border-radius:12px}.guide-toc nav{border:0;padding:0}.guide-toc summary{min-height:24px}}
/* Focus the inline preview on the article body; the linked original stays intact. */
.official-image-window{display:block;position:relative;overflow:hidden;aspect-ratio:730/650;background:white}.official-figure .official-image-window img{position:absolute;max-width:none;width:203.7%;height:auto;left:-34.25%;top:-10.77%}.official-figure>a{display:block;cursor:zoom-in}

/* Visual review: quiet navigation and comfortable reading on narrow screens. */
.guide-layout{max-width:1120px;margin-inline:auto;justify-content:start}
.guide-header{max-width:1120px;margin-inline:auto}
.guide-header h1{max-width:1000px;text-wrap:balance}
@media(max-width:800px){
 .header .menu-toggle{width:44px;height:44px}
 .task-checklist li{font-size:12px}
 .guide-row{gap:12px;align-items:flex-start}
 .guide-row>.lesson-number{display:none}
 .guide-row>.icon{width:20px;height:20px;margin-top:5px}
 .guide-row>div{min-width:0}
 .field-help,.cost-equation>div>span{font-size:12px}
 .amount-presets button{min-height:44px}
}

.mobile-nav a[aria-current="page"]{color:var(--mint);font-weight:600}

/* A usable first exercise on the homepage. */
.home-hero{padding-block:48px;gap:56px;align-items:center}
.hero-preview{padding:26px 30px;box-shadow:0 12px 36px #2455f508}
.hero-preview h2{font-size:23px;line-height:1.4}
.hero-preview .eyebrow{margin-bottom:10px}
.hero-preview .preview-amount{margin-block:14px;font-variant-numeric:tabular-nums}
.demo-presets{display:flex;gap:10px;margin-bottom:18px}
.demo-presets button{flex:1;min-height:44px;background:#fff;border:1px solid #dbe4fa;border-radius:8px;color:#405071;transition:background .15s,color .15s}
.demo-presets button[aria-pressed=true]{background:#2455f5;color:#fff;border-color:#2455f5}
.demo-presets button:hover{border-color:#2455f5}
.hero-preview .preview-split{padding-block:16px}
.hero-preview .preview-receipt{padding-block:16px;margin-bottom:0}
.demo-values{font-variant-numeric:tabular-nums}
.demo-explainer{margin:4px 0 16px;border-top:1px solid #dbe4fa;padding-top:12px}
.demo-explainer summary{cursor:pointer;color:#2455f5;font-size:14px;min-height:30px}
.demo-explainer p{font-size:14px;color:#566173;margin-top:10px}
#demo-continue{margin-bottom:12px}
@media(max-width:800px){.home-hero{padding-block:32px;gap:28px}.hero-preview{padding:22px}.hero-copy h1{font-size:36px}.hero-actions{margin-top:24px}}
@media(prefers-reduced-motion:reduce){.demo-presets button{transition:none}}

.preview-split strong span{font-size:inherit;color:inherit}
.home-hero{padding-block:32px}
.hero-preview .preview-receipt{padding-block:12px}
body[data-page=home] #lessons{padding-top:28px}
.card-mini-diagram{display:flex;align-items:center;justify-content:space-between;gap:8px;background:#f3f6ff;border-radius:8px;padding:12px;margin:18px 0;color:#596880;font-size:14px;font-variant-numeric:tabular-nums}
.card-mini-diagram strong{color:#2455f5}
body[data-page=home] .lesson-card h3{font-size:23px;line-height:1.45}

/* Keep the longer Chinese brand comfortable in the mobile header. */
@media(max-width:430px){body[data-lang=zh-hans] .header .brand-name{font-size:20px}body[data-lang=zh-hans] .header .brand{gap:6px}body[data-lang=zh-hans] .header-actions{gap:4px}}

/* Disabled simulation controls remain readable when scripts are unavailable. */
#practice-controls{border:0;min-width:0;margin:0;padding:0}
#practice-controls:disabled{opacity:.65}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}.button:hover{transform:none}}

/* Keep source transparency close to the article without interrupting reading. */
.guide-method{font-size:13px;margin:0 0 16px;color:var(--mint)}
.guide-method a{text-decoration:underline;text-underline-offset:3px}
.guide-disclosure{padding:16px 0;border-top:1px solid var(--line)}
#editorial{scroll-margin-top:100px}
#editorial p+p{margin-top:16px}

.guide-entry{border-top:1px solid var(--line);padding-bottom:28px}
.guide-entry:last-child{border-bottom:1px solid var(--line)}
.guide-entry .guide-row{border:0;padding-bottom:18px}
.guide-question-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 28px;margin-left:56px}
.guide-question-links>p{grid-column:1/-1;font-size:12px;margin-bottom:4px}
.guide-question-links>a{display:flex;justify-content:space-between;align-items:center;gap:12px;min-height:44px;font-size:14px;line-height:1.6;color:var(--mint)}
.guide-question-links>a:hover{text-decoration:underline;text-underline-offset:3px}
.guide-question-links .icon{width:16px;height:16px}
@media(max-width:800px){.guide-question-links{grid-template-columns:1fr;margin-left:0;gap:4px}.guide-entry{padding-bottom:24px}}