:root{--paper:#f4f5ef;--ink:#19352b;--muted:#69786e;--line:#d8dfd3;--lime:#d5f5a0;--mono:ui-monospace,SFMono-Regular,Consolas,monospace;--sans:Inter,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit}a,button{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,[tabindex]:focus-visible{outline:3px solid #578833;outline-offset:5px}::selection{background:var(--lime);color:var(--ink)}.section-wrap,.header{max-width:1328px;margin:0 auto;padding-left:64px;padding-right:64px}.header{height:110px;display:flex;align-items:center;justify-content:space-between;gap:30px}.brand{display:inline-flex;align-items:center;gap:8px;font-size:28px;letter-spacing:-1.4px;font-weight:650}.brand-mark{width:33px;height:33px;fill:currentColor}.brand-dot{font-size:11px;align-self:flex-start;padding-top:7px;margin-left:0;letter-spacing:0}.header nav{display:flex;gap:36px;margin-left:auto;margin-right:0;font-size:13px;font-weight:500}.header nav a:hover,.footer a:hover{color:#607c43}.portal-link{display:flex;align-items:center;gap:24px;font-size:13px;border:1px solid #afbdae;padding:12px 18px;border-radius:5px}.portal-link:hover{background:var(--lime)}.portal-link span{font-size:20px;line-height:12px}.hero{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:40px;padding-top:73px;padding-bottom:76px}.eyebrow{font-family:var(--mono);font-size:10px;font-weight:500;letter-spacing:1.4px;line-height:1.8;margin:0 0 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0;min-height:17px}.market-strip{display:flex;align-items:center;justify-content:space-between;gap:30px;position:relative;padding-top:30px;padding-bottom:30px}.market-strip:before,.market-strip:after{content:"";position:absolute;left:64px;right:64px;top:0;height:1px;background:var(--line)}.market-strip:after{top:auto;bottom:0}.market-strip>span:not(.strip-intro){font-family:var(--mono);font-size:11px;letter-spacing:1px;line-height:1.6;color:#63785e}.strip-intro{font-size:11px;line-height:1.9;color:#87907e}.strip-intro strong{font-weight:500;color:#4b6247}.market-strip>svg{height:25px;width:25px;stroke:#6a8656;stroke-width:1.2;flex-shrink:0}.expertise{padding-top:104px;padding-bottom:110px}.section-heading{display:flex;justify-content:space-between;gap:30px;align-items:flex-end;margin-bottom:47px}.section-heading .eyebrow{margin-bottom:20px;color:#798b6c}.section-heading h2{font-size:36px;letter-spacing:-1.4px;line-height:1.45;font-weight:500;margin:0}.section-heading>p{font-size:13px;line-height:2;color:var(--muted);margin:0 0 5px}.expertise-grid{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:8px;overflow:hidden}.expertise-card{padding:30px 25px;border-right:1px solid var(--line);transition:background .25s}.expertise-card:last-child{border-right:0}.expertise-card:hover{background:#eaf0e1}.card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:38px}.card-number{font-family:var(--mono);font-size:10px;color:#95a18a}.card-top svg{width:83px;height:54px;stroke:#4f7050;stroke-width:1.5;fill:none;overflow:visible}.card-top svg .faint{stroke:#cdd8c4;stroke-width:1}.card-top circle{fill:var(--lime)}.card-english{font-family:var(--mono);font-size:8px;letter-spacing:.75px;color:#74826b;line-height:1.7;min-height:28px;margin:0 0 9px}.expertise-card h3{font-size:19px;font-weight:500;letter-spacing:-.4px;margin:0 0 17px}.expertise-card h3+p{font-size:12px;line-height:1.95;color:var(--muted);margin:0;min-height:118px}.tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:27px;font-size:9px;color:#657c58}.tags span{border:1px solid #ced8c5;padding:5px 7px;border-radius:3px}.approach{background:#18382e;color:#f0f4e9;position:relative;overflow:hidden}.approach-inner{display:grid;grid-template-columns:1fr 1fr;gap:100px;padding-top:80px;padding-bottom:80px}.approach .eyebrow{color:#a0b8a0;margin-bottom:25px}.approach h2{font-size:38px;letter-spacing:-1.3px;line-height:1.55;font-weight:450;margin:0 0 22px}.approach h2 span{color:#cbe999}.approach-intro>p:not(.eyebrow){font-size:12px;color:#a3b8a9;line-height:1.9}.system-mark{display:flex;gap:7px;align-items:center;height:65px;margin-top:40px;opacity:.65}.system-mark span{width:8px;height:25px;border:1px solid #779374;transform:skewY(-25deg)}.system-mark 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pulse{0%,100%{opacity:.5}50%{opacity:1}}@media(min-width:1600px){.hero{padding-top:95px;padding-bottom:100px}}@media(max-width:1100px){.section-wrap,.header{padding-left:36px;padding-right:36px}.hero{gap:28px}.market-strip:before,.market-strip:after,.footer:before{left:36px;right:36px}.eyebrow{font-size:8px;letter-spacing:1px}.expertise-card{padding:28px}.expertise-card h3+p{min-height:70px}.card-english{min-height:0}.card-top{margin-bottom:25px}.approach-inner{gap:65px}.market-strip>span:not(.strip-intro){font-size:9px}.visual-top{font-size:8px}.diagram-label{font-size:8px}.market-visual{padding:22px 20px 18px}}@media(max-width:760px){.section-wrap,.header{padding-left:24px;padding-right:24px}.header{height:85px;gap:15px}.brand{font-size:25px}.brand-mark{width:28px;height:28px}.header nav{gap:18px;font-size:11px}.portal-link{font-size:11px;gap:16px;padding:10px 13px}.hero{grid-template-columns:1fr;padding-top:34px;padding-bottom:43px;gap:38px}.eyebrow{font-size:8px;letter-spacing:1.05px;margin-bottom:23px}h1{font-size:58px;letter-spacing:-3px;margin-bottom:23px}.hero-description{font-size:14px;margin-bottom:25px}.hero-footnote{margin-top:25px;font-size:8px}.market-visual{padding:23px 22px 19px;max-width:550px;width:100%;justify-self:center}.visual-top{font-size:8px}.visual-title{font-size:18px;margin-top:23px}.market-strip{flex-wrap:wrap;justify-content:flex-start;gap:20px 28px;padding-top:25px;padding-bottom:25px}.market-strip:before,.market-strip:after,.footer:before{left:24px;right:24px}.strip-intro{width:100%;display:flex;gap:8px;font-size:10px}.strip-intro br{display:none}.market-strip>span:not(.strip-intro){font-size:8px;letter-spacing:.6px}.market-strip>svg{width:20px;height:20px;margin-left:auto}.expertise{padding-top:65px;padding-bottom:65px}.section-heading{display:block;margin-bottom:30px}.section-heading h2{font-size:29px;letter-spacing:-1px;line-height:1.5}.section-heading>p{font-size:12px;margin-top:22px}.section-heading>p br{display:none}.expertise-card{padding:24px 20px}.expertise-card h3{font-size:18px}.expertise-card h3+p{font-size:11px;min-height:106px}.card-english{font-size:7px;min-height:25px;letter-spacing:.4px}.card-top svg{width:64px;height:45px}.tags{font-size:8px;gap:5px;margin-top:20px}.tags span{padding:4px 5px}.approach-inner{grid-template-columns:1fr;gap:38px;padding-top:55px;padding-bottom:55px}.approach h2{font-size:33px}.system-mark{display:none}.principles article:first-child{padding-top:24px;border-top:1px solid #3a5547}.principles p{max-width:none}.closing{padding-top:65px;padding-bottom:60px}.closing h2{font-size:45px;letter-spacing:-2px}.round-link{right:25px;top:139px;height:64px;width:64px}.round-link svg{width:25px;height:25px}.closing-note{font-size:7px;letter-spacing:.5px;gap:10px;margin-top:30px}.footer>span{margin-right:0;font-size:8px}.footer .brand{font-size:21px}.footer{gap:12px;padding-top:25px}.footer>p{font-size:8px}}@media(max-width:380px){h1{font-size:51px}.section-wrap,.header{padding-left:19px;padding-right:19px}.expertise-grid{grid-template-columns:1fr}.expertise-card{border-right:0;border-bottom:1px solid var(--line)}.expertise-card:last-child{border-bottom:0}.expertise-card h3+p{min-height:0}.card-english{min-height:0}.closing h2{font-size:40px}.closing-note{font-size:6px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

@media(max-width:760px){.visual-tabs button{min-height:44px}.header nav a{padding:10px 0}}

@media(max-width:760px){.expertise-grid{grid-template-columns:1fr}.expertise-card{border-right:0;border-bottom:1px solid var(--line)}.expertise-card:last-child{border-bottom:0}.expertise-card h3+p{min-height:0;font-size:12px}.card-english{min-height:0;font-size:8px}}

/* Public BTCUSDT perpetual order book */
.live-book{padding-top:24px;padding-bottom:21px}
.live-book [hidden]{display:none!important}
.feed-status{display:inline-flex;gap:6px;align-items:center;font-family:var(--sans);font-size:10px;letter-spacing:0}
.live-book .status-dot{background:#99a28e}
.live-book[data-state=live] .status-dot{background:#54843d;box-shadow:0 0 0 3px #54843d12}
.live-book[data-state=stale] .status-dot,.live-book[data-state=reconnecting] .status-dot,.live-book[data-state=offline] .status-dot{background:#ae8c52}
.book-title{display:flex;gap:12px;align-items:center;margin-top:24px}
.book-title h2{font-family:var(--mono);font-size:23px;font-weight:500;letter-spacing:-1px;margin:0}
.book-title h2 span{color:#7d8e73;font-size:17px}
.contract-badge{font-size:9px;border:1px solid #c6d3ba;border-radius:3px;padding:4px 6px;color:#657b54}
.book-summary{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-top:23px;min-height:54px}
.metric-label{display:block;font-size:9px;letter-spacing:.2px;color:#6d7d60;margin-bottom:8px}
#mid-price{display:block;font-family:var(--mono);font-size:31px;letter-spacing:-1.3px;font-weight:400;font-variant-numeric:tabular-nums;line-height:1.05}
.spread-metric{text-align:right}
#spread{font-family:var(--mono);font-size:16px;font-variant-numeric:tabular-nums}
.depth-chart{height:245px;margin:14px -8px 0}
.depth-chart svg{height:100%;width:100%;display:block;overflow:visible}
.depth-grid{stroke:#d5dfcd;stroke-width:1}
.depth-midline{stroke:#8ca276;stroke-width:1;stroke-dasharray:3 5;fill:none}
.depth-bid-area{fill:#a5c785;fill-opacity:.6}
.depth-ask-area{fill:#d1b9a0;fill-opacity:.4}
.depth-bid-line{fill:none;stroke:#6b9151;stroke-width:1.7;stroke-linejoin:round}
.depth-ask-line{fill:none;stroke:#a98868;stroke-width:1.7;stroke-linejoin:round}
.depth-chart text{font-family:var(--mono);fill:#6c7c60;font-size:10px;letter-spacing:0}
.depth-chart .axis-note{font-size:9px}
.depth-chart .chart-empty{font-family:var(--sans);fill:#7c8c70;font-size:12px}
.best-quotes{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:0 0 19px}
.best-quotes>div{display:flex;flex-direction:column;gap:8px;padding-top:10px;border-top:1px solid #d0dbc6}
.best-quotes>div:last-child{text-align:right}
.best-quotes span{font-size:9px;color:#6d7d60;display:inline-flex;align-items:center;gap:6px}
.best-quotes>div:last-child span{justify-content:flex-end}
.best-quotes strong{font-family:var(--mono);font-size:16px;font-weight:400;font-variant-numeric:tabular-nums;color:#4c703a}
.best-quotes>div:last-child strong{color:#8d704f}
.bid-key,.ask-key{width:5px;height:5px;display:inline-block;border-radius:1px;background:#759557}
.ask-key{background:#ae8f70}
.book-footnote{display:flex;justify-content:space-between;gap:10px;margin-top:13px;font-size:9px;line-height:1.7;color:#7b8970;font-variant-numeric:tabular-nums}
.order-tables{display:grid;grid-template-columns:1fr 1fr;gap:18px;height:245px;margin-top:14px;padding-top:4px;padding-bottom:9px}
.order-tables table{border-collapse:collapse;width:100%;font-family:var(--mono);font-size:10px;table-layout:fixed}
.order-tables caption{text-align:left;font-family:var(--sans);font-size:10px;color:#64804c;margin-bottom:12px}
.order-tables caption span{font-family:var(--mono);font-size:9px;margin-left:4px;opacity:.6}
.order-tables .ask-table caption{color:#977650}
.order-tables th{text-align:left;font-family:var(--sans);font-weight:400;font-size:8px;color:#7d8a72;padding:0 3px 9px;white-space:nowrap}
.order-tables td{padding:3px;position:relative;font-variant-numeric:tabular-nums;white-space:nowrap;line-height:1.35}
.order-tables td:last-child,.order-tables th:last-child{text-align:right}
.order-tables tr{background:linear-gradient(to left,#b6cc9b55 var(--depth,0%),transparent var(--depth,0%))}
.order-tables .ask-table tr{background:linear-gradient(to left,#d4bfa544 var(--depth,0%),transparent var(--depth,0%))}
.order-tables .bid-table td:first-child{color:#53733f}
.order-tables .ask-table td:first-child{color:#8c6a47}
@media(max-width:1100px){#mid-price{font-size:27px}.order-tables{gap:10px}.order-tables td{font-size:9px}}
@media(max-width:760px){.depth-chart,.order-tables{height:218px}.book-title{margin-top:20px}.book-summary{margin-top:20px}#mid-price{font-size:30px}.order-tables td{font-size:10px}.book-footnote{font-size:8px}.best-quotes strong{font-size:15px}}
@media(max-width:380px){#mid-price{font-size:26px}.spread-metric .metric-label{font-size:8px}.order-tables{gap:9px}.order-tables td{font-size:8px}.book-footnote{font-size:7px}}

/* Language selection and English typesetting. */
.language-switch{display:flex;align-items:center;gap:7px;flex-shrink:0;color:#a1ad98;font-size:11px;margin-left:8px}
.language-switch button{border:0;background:none;padding:9px 3px;color:#7c8c70;cursor:pointer;font-size:11px;min-width:28px;min-height:36px}
.language-switch button[aria-pressed=true]{color:var(--ink);font-weight:650}
.language-switch button:hover{color:#42642f}
html[lang=en] h1{font-size:clamp(56px,5.6vw,79px);line-height:1.06;letter-spacing:-4px;font-weight:450}
html[lang=en] .hero-description{line-height:1.8}
html[lang=en] .expertise-card h3{line-height:1.4;min-height:54px}
html[lang=en] .expertise-card h3+p{min-height:144px}
html[lang=en] .approach h2{font-size:32px;line-height:1.5;letter-spacing:-1px}
html[lang=en] .closing h2{font-size:62px}
html[lang=en] .book-footnote{font-size:8px}
@media(max-width:1100px){html[lang=en] .expertise-card h3+p{min-height:188px}html[lang=en] .approach h2{font-size:26px}html[lang=en] .section-heading h2{font-size:32px}html[lang=en] .section-heading>p{max-width:38%}}
@media(max-width:760px){.header{flex-wrap:wrap;height:auto;min-height:99px;gap:4px 16px;padding-top:17px;padding-bottom:12px}.header .brand{order:0}.language-switch{order:1;margin-left:auto}.header nav{order:2;width:100%;justify-content:flex-end;gap:22px;font-size:10px}.header nav a{padding:7px 0}.hero{padding-top:27px}html[lang=en] h1{font-size:64px;letter-spacing:-3px}html[lang=en] .expertise-card h3,html[lang=en] .expertise-card h3+p{min-height:0}html[lang=en] .section-heading>p{max-width:none}html[lang=en] .approach h2{font-size:27px}html[lang=en] .closing h2{font-size:37px;letter-spacing:-1.8px}html[lang=en] .round-link{top:196px;width:44px;height:44px}html[lang=en] .book-footnote{font-size:7px}html[lang=en] .feed-status{font-size:9px}}
@media(max-width:380px){html[lang=en] h1{font-size:56px}html[lang=en] .approach h2{font-size:23px}html[lang=en] .closing h2{font-size:32px}html[lang=en] .section-heading h2{font-size:28px}}

/* The market card presents the live order book directly. */
.live-book .order-tables{height:266px;margin-top:25px;padding-top:0;padding-bottom:0}
.live-book .book-footnote{border-top:1px solid #d0dbc6;padding-top:13px;margin-top:20px}
@media(max-width:760px){.live-book .order-tables{height:245px}}

/* Approved Orderbook H symbol with the original wordmark. */
.brand-logo{display:block;width:187px;height:auto}.footer .brand-logo{width:160px}
@media(max-width:760px){.header .brand-logo{width:170px}.footer .brand-logo{width:150px}}