:root{--ink:#101010;--muted:#6f6a60;--paper:#f7f1e5;--paper-deep:#eee3cf;--lime:#d8ff4f;--line:rgba(16,16,16,.14);--white:#fffaf1;--shadow:0 26px 70px rgba(16,16,16,.16);--radius:32px;--container:1240px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.6;overflow-x:hidden}body.lock{overflow:hidden}a{text-decoration:none;color:inherit}img{max-width:100%;display:block}button{font:inherit;color:inherit}
.site-header{position:sticky;top:0;z-index:60;display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:center;padding:18px clamp(18px,4vw,56px);background:rgba(247,241,229,.86);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px;font-weight:950}.brand img{width:208px;height:auto}.brand span{display:none;font-size:20px}
.site-header nav{justify-self:end;display:flex;gap:8px;align-items:center;padding:6px;border:1px solid var(--line);border-radius:999px;background:rgba(255,250,241,.62)}.site-header nav a,.site-header nav button{font-size:14px;color:#3c3932;padding:9px 15px;border-radius:999px;border:0;background:transparent;cursor:pointer}.site-header nav a:hover,.site-header nav button:hover{background:var(--ink);color:var(--paper)}.nav-contact{background:var(--ink)!important;color:var(--lime)!important}.menu-toggle{display:none;border:1px solid var(--line);border-radius:999px;background:var(--white);padding:10px 14px;color:var(--ink)}
.hero-editorial{position:relative;min-height:760px;display:grid;grid-template-columns:minmax(0,1.02fr) minmax(360px,.98fr);gap:42px;align-items:center;padding:clamp(60px,8vw,108px) clamp(18px,5vw,72px);isolation:isolate}.hero-editorial:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 64% 18%,rgba(216,255,79,.52),transparent 27%),linear-gradient(135deg,rgba(255,255,255,.28),transparent 44%);z-index:-2}.hero-editorial:after{content:"LEDGER SERVICE";position:absolute;left:clamp(16px,4vw,60px);bottom:14px;font-size:clamp(54px,12vw,176px);font-weight:950;letter-spacing:-.08em;line-height:.78;color:rgba(16,16,16,.055);z-index:-1;white-space:nowrap}.hero-copy p,.section-head p,.download-strip p,.sub-hero p,.eyebrow{margin:0 0 16px;color:#2c2a26;letter-spacing:.22em;font-size:12px;font-weight:900;text-transform:uppercase}.hero-copy h1{margin:0;font-size:clamp(46px,8vw,112px);line-height:.9;letter-spacing:-.08em;max-width:900px}.hero-copy span{display:block;margin-top:26px;max-width:680px;font-size:clamp(17px,2vw,22px);color:var(--muted)}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}.btn,.product-layout button,.table-btn,.footer-links button{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 22px;border-radius:999px;font-weight:900;border:1px solid var(--ink);cursor:pointer}.btn-primary,.product-layout button,.table-btn{background:var(--ink);color:var(--lime)}.btn-ghost{background:var(--white);color:var(--ink)}.btn-line{background:transparent;color:var(--ink)}
.hero-art{position:relative;min-height:580px;display:grid;place-items:center;border-radius:50%;background:linear-gradient(145deg,var(--white),var(--paper-deep));box-shadow:inset 0 0 0 1px var(--line),0 42px 100px rgba(16,16,16,.15);overflow:visible}.hero-art:before{content:"";position:absolute;width:74%;height:74%;border:1px solid rgba(16,16,16,.12);border-radius:50%}.hero-art>img{position:relative;z-index:2;max-height:560px;object-fit:contain;filter:drop-shadow(0 36px 42px rgba(16,16,16,.20))}.issue-card{position:absolute;left:-22px;top:24px;width:184px;aspect-ratio:1;background:var(--ink);color:var(--paper);border-radius:28px;padding:24px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:var(--shadow);transform:rotate(-5deg);z-index:3}.issue-card small{letter-spacing:.2em;color:var(--lime);font-weight:900}.issue-card strong{font-size:82px;line-height:.8;letter-spacing:-.08em}.issue-card span{color:#d2cab9}
.ticker{display:grid;grid-template-columns:repeat(5,1fr);border-block:1px solid var(--line);background:var(--ink);color:var(--paper)}.ticker div{padding:18px 14px;text-align:center;font-size:13px;font-weight:800;letter-spacing:.08em;border-right:1px solid rgba(255,255,255,.14)}.ticker div:last-child{border-right:0}
.entry-board,.section,.product-editorial,.download-strip,.site-footer,.sub-hero{width:min(var(--container),calc(100% - 36px));margin:30px auto}.entry-board{display:grid;grid-template-columns:1.12fr .96fr .96fr .96fr;gap:16px}.entry-board a,.entry-board button{min-height:260px;text-align:left;padding:26px;border:1px solid var(--line);border-radius:30px;background:rgba(255,250,241,.76);box-shadow:var(--shadow);display:flex;flex-direction:column;justify-content:space-between;cursor:pointer}.entry-main{background:var(--ink)!important;color:var(--paper)}.entry-main p,.entry-main strong{color:#e7dec9!important}.entry-board small,.product-layout small{font-weight:950;letter-spacing:.14em;text-transform:uppercase;color:#6c6b2b;font-size:12px}.entry-board h2{font-size:48px;line-height:.96;letter-spacing:-.06em;margin:14px 0}.entry-board h3,.product-layout h3,.feature-grid h3,.path-grid h3,.security-grid h3,.scenario-grid h3,.support-section h3{font-size:26px;line-height:1.05;margin:14px 0 8px}.entry-board p,.product-layout p,.feature-grid p,.path-grid p,.security-grid p,.scenario-grid p,.faq-section p,.support-section p,.site-footer p{color:var(--muted);line-height:1.76}.entry-board strong{word-break:break-word}
.section,.product-editorial,.sub-hero{padding:42px;border-radius:34px;background:rgba(255,250,241,.72);border:1px solid var(--line);box-shadow:var(--shadow)}.section-head{text-align:center;max-width:900px;margin:0 auto 34px}.section-head h2,.download-strip h2,.support-section h2,.faq-section h2,.sub-hero h1{font-size:clamp(36px,5vw,70px);line-height:.98;letter-spacing:-.06em;margin:0 0 14px}.section-head span,.download-strip span,.support-section span,.sub-hero span{display:block;color:var(--muted);line-height:1.85}.feature-grid,.path-grid,.security-grid,.scenario-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.feature-grid article,.path-grid article,.security-grid article,.scenario-grid article{background:var(--white);border:1px solid var(--line);border-radius:26px;padding:22px}.feature-grid b,.path-grid b{display:grid;place-items:center;width:46px;height:46px;border-radius:16px;background:var(--ink);color:var(--lime);margin-bottom:12px}
.product-layout{display:grid;grid-template-columns:1.15fr .85fr .85fr;grid-template-areas:"lead flex nano" "lead splus splus";gap:16px}.product-layout article{background:var(--white);border:1px solid var(--line);border-radius:28px;padding:24px;display:flex;flex-direction:column;box-shadow:0 18px 50px rgba(16,16,16,.10)}.product-lead{grid-area:lead;display:grid!important;grid-template-columns:1fr;min-height:660px;background:var(--ink)!important;color:var(--paper)}.product-lead p,.product-lead small{color:#d7d0c1!important}.product-layout article:nth-child(2){grid-area:flex}.product-layout article:nth-child(3){grid-area:nano}.product-layout article:nth-child(4){grid-area:splus;display:grid;grid-template-columns:260px 1fr;align-items:center}.product-layout img{height:210px;object-fit:contain;margin:12px auto}.product-lead img{height:360px}.product-layout strong{display:block;font-size:32px;margin:10px 0}.product-layout button{margin-top:auto}
.table-wrap{overflow:auto;border-radius:24px;background:var(--white);border:1px solid var(--line)}table{width:100%;border-collapse:collapse;min-width:940px}th,td{padding:18px;border-bottom:1px solid var(--line);text-align:left}th{background:var(--ink);color:var(--paper)}td:first-child,td:nth-child(2){font-weight:900}
.download-strip{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;padding:42px;border-radius:34px;background:var(--lime);border:1px solid var(--ink);box-shadow:var(--shadow)}.download-strip .btn{white-space:nowrap}
.security-grid,.scenario-grid{grid-template-columns:repeat(2,1fr)}.faq-section details{border-top:1px solid var(--line);padding:18px 0}.faq-section summary{font-size:20px;font-weight:950;cursor:pointer}.support-section{display:grid;grid-template-columns:1.05fr .75fr;gap:24px}.tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}.tags em{font-style:normal;padding:9px 12px;border-radius:999px;background:var(--white);border:1px solid var(--line);color:var(--muted);font-size:13px}.qr-card{text-align:center;padding:26px;border-radius:28px;background:var(--white);border:1px solid var(--line)}.qr-card img{width:min(300px,100%);margin:0 auto 18px;padding:12px;background:#fff;border-radius:20px;border:1px solid var(--line)}
.site-footer{margin-top:48px;padding:42px;background:var(--ink);color:var(--paper);border-radius:34px;display:flex;justify-content:space-between;gap:24px}.site-footer strong{font-size:34px}.site-footer p{color:#d8cfbd;max-width:760px}.footer-links{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}.footer-links a,.footer-links button{border:1px solid rgba(255,255,255,.18);background:transparent;color:var(--paper);border-radius:999px;padding:12px 16px}
.sub-main{padding-top:1px}.sub-hero{background:var(--ink);color:var(--paper)}.sub-hero p{color:var(--lime)}.sub-hero span{color:#d8cfbd}
.modal{position:fixed;inset:0;z-index:120;display:none;align-items:center;justify-content:center;padding:22px}.modal.active{display:flex}.modal-mask{position:absolute;inset:0;background:rgba(0,0,0,.72);backdrop-filter:blur(8px)}.modal-card{position:relative;z-index:1;width:min(430px,92vw);padding:28px;border-radius:30px;background:var(--paper);color:var(--ink);text-align:center;box-shadow:var(--shadow)}.modal-card img{width:230px;margin:18px auto;border-radius:20px;background:#fff;padding:10px}.modal-card h3{font-size:28px;margin:0}.modal-card p{color:var(--muted)}.modal-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:18px}.close{position:absolute;right:14px;top:14px;width:36px;height:36px;border:0;border-radius:50%;background:var(--ink);color:var(--lime);font-size:22px}.float-contact{position:fixed;right:18px;bottom:18px;z-index:90;border:1px solid var(--ink);border-radius:999px;background:var(--ink);color:var(--lime);padding:14px 18px;font-weight:950;box-shadow:0 18px 40px rgba(16,16,16,.22)}
@media(max-width:1100px){.site-header{grid-template-columns:1fr auto}.brand img{display:none}.brand span{display:inline}.menu-toggle{display:block}.site-header nav{display:none;position:absolute;top:74px;left:18px;right:18px;flex-direction:column;align-items:flex-start;border-radius:24px;padding:16px;background:var(--white);box-shadow:var(--shadow)}.site-header nav.is-open{display:flex}.hero-editorial,.support-section{grid-template-columns:1fr}.entry-board{grid-template-columns:repeat(2,1fr)}.feature-grid,.path-grid,.product-layout{grid-template-columns:1fr 1fr}.product-layout{grid-template-areas:"lead lead" "flex nano" "splus splus"}.download-strip,.site-footer{grid-template-columns:1fr;display:grid}.footer-links{justify-content:flex-start}}
@media(max-width:680px){.site-header{padding:14px 18px}.hero-editorial{grid-template-columns:1fr;padding:44px 20px}.hero-copy h1{font-size:42px}.hero-art{min-height:390px}.hero-art>img{max-height:360px}.issue-card{width:130px;padding:16px}.issue-card strong{font-size:54px}.ticker,.entry-board,.feature-grid,.path-grid,.security-grid,.scenario-grid,.product-layout{grid-template-columns:1fr}.product-layout{grid-template-areas:"lead" "flex" "nano" "splus"}.product-layout article:nth-child(4){grid-template-columns:1fr}.section,.product-editorial,.download-strip,.sub-hero{padding:24px}.section-head{text-align:left}.entry-board h2{font-size:40px}.hero-actions,.modal-actions{flex-direction:column}.btn,.product-layout button,.table-btn{width:100%}.site-footer{padding:30px 22px}.float-contact{left:14px;right:14px;text-align:center}}
/* seo-quality-accessibility */
.skip-link{position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden;z-index:9999}
.skip-link:focus{left:16px;top:16px;width:auto;height:auto;padding:10px 14px;border-radius:999px;background:#fff;color:#111;text-decoration:none;box-shadow:0 12px 36px rgba(0,0,0,.18)}
img{max-width:100%;height:auto}
a:focus-visible,button:focus-visible{outline:2px solid currentColor;outline-offset:3px}
@media (prefers-reduced-motion: reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}