:root{--navy:#0d223a;--navy-2:#173a5c;--blue:#285a80;--ink:#10253b;--muted:#65778a;--line:#dbe3e9;--surface:#f4f7f9;--white:#fff;--gold:#c89737;--gold-dark:#755315;--gold-soft:#f8efd9;--radius:14px;--shadow:0 24px 70px rgba(13,34,58,.11)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--surface);color:var(--ink);font-family:"Avenir Next","Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.skip-link{position:fixed;left:16px;top:-80px;z-index:99;padding:10px 14px;background:var(--navy);color:#fff;border-radius:8px}.skip-link:focus{top:16px}
.site-header{position:sticky;top:0;z-index:30;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:32px;min-height:72px;padding:0 clamp(22px,5vw,72px);border-bottom:1px solid rgba(219,227,233,.92);background:rgba(244,247,249,.93);backdrop-filter:blur(18px)}.fde-brand{display:flex;align-items:center;gap:10px}.fde-brand img{width:34px;height:34px;border-radius:8px}.fde-brand span{font-size:13px;font-weight:800;letter-spacing:.08em}.fde-brand small{display:block;font-size:8px;font-weight:600;color:var(--muted);letter-spacing:.04em;margin-top:2px}.site-header nav{display:flex;justify-content:center;gap:28px}.site-header nav a{font-size:12px;color:#4e6377;transition:color .2s}.site-header nav a:hover{color:var(--navy)}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 18px;border:1px solid transparent;border-radius:8px;font-size:12px;font-weight:750;white-space:nowrap;cursor:pointer;transition:transform .2s,background .2s,border-color .2s}.button:active{transform:translateY(1px) scale(.99)}.button-primary{background:var(--gold);color:#10253b;border-color:#b9872d}.button-primary:hover{background:#d4a94f}.button-quiet{background:#fff;color:var(--navy);border-color:var(--line)}.button-quiet:hover{border-color:#9fb1bf}.text-link{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:750;color:var(--navy)}.text-link span{transition:transform .2s}.text-link:hover span{transform:translateX(4px)}
.hero{max-width:1440px;min-height:calc(100dvh - 72px);margin:0 auto;padding:clamp(64px,8vw,118px) clamp(24px,6vw,92px);display:grid;grid-template-columns:minmax(0,.92fr) minmax(440px,1.08fr);align-items:center;gap:clamp(48px,7vw,110px)}.eyebrow{display:inline-block;color:var(--gold-dark);font-size:10px;font-weight:800;letter-spacing:.14em;text-transform:uppercase}.hero h1{max-width:760px;margin:18px 0 22px;font-size:clamp(46px,5.7vw,82px);line-height:1.02;letter-spacing:-.055em}.hero-copy>p{max-width:650px;margin:0;color:#51667a;font-size:17px;line-height:1.8}.hero-actions{display:flex;align-items:center;gap:24px;margin-top:32px}
.profit-canvas{position:relative;overflow:hidden;padding:28px;border:1px solid #284762;border-radius:var(--radius);background:var(--navy);color:#fff;box-shadow:var(--shadow)}.profit-canvas:before{content:"";position:absolute;right:-90px;top:-110px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(200,151,55,.28),transparent 68%);pointer-events:none}.canvas-head,.canvas-result{display:flex;justify-content:space-between;gap:20px;align-items:center}.canvas-head span,.canvas-result span{font-size:9px;color:#9fb1c3;letter-spacing:.09em;text-transform:uppercase}.canvas-head strong,.canvas-result strong{font-size:12px;text-align:right}.threshold{margin:46px 0 34px}.threshold>span{display:block;margin-bottom:9px;font-size:10px;color:#b8c6d2}.threshold-line{height:2px;background:#35516a}.threshold-line i{display:block;width:62%;height:2px;background:var(--gold);box-shadow:0 0 22px rgba(200,151,55,.5)}.engine-grid{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid #35516a;border-radius:10px;overflow:hidden}.engine-grid div{min-height:150px;padding:18px;border-left:1px solid #35516a}.engine-grid div:first-child{border-left:0}.engine-grid span{display:block;font-family:Georgia,serif;color:var(--gold);font-size:17px}.engine-grid strong{display:block;margin-top:36px;font-size:12px}.engine-grid small{display:block;margin-top:6px;color:#9fb1c3;font-size:9px;line-height:1.55}.canvas-result{margin-top:26px;padding-top:20px;border-top:1px solid #35516a}
.principle-strip{max-width:1440px;margin:0 auto;padding:0 clamp(24px,6vw,92px) 72px;display:grid;grid-template-columns:repeat(4,1fr)}.principle-strip div{padding:18px 20px;border-left:1px solid var(--line)}.principle-strip div:first-child{border-left:0}.principle-strip span{display:block;color:var(--muted);font-size:9px}.principle-strip strong{display:block;margin-top:7px;font-size:13px}
.section{max-width:1440px;margin:0 auto;padding:110px clamp(24px,6vw,92px)}.section-title{max-width:780px;margin-bottom:52px}.section-title h2,.system-intro h2,.fit-copy h2,.assessment-copy h2{margin:14px 0 16px;font-size:clamp(34px,4.2vw,58px);line-height:1.06;letter-spacing:-.045em}.section-title p,.system-intro p,.fit-copy p,.assessment-copy p{max-width:660px;margin:0;color:var(--muted);font-size:14px;line-height:1.8}
.partnership{border-top:1px solid var(--line)}.model-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}.model-primary{min-height:430px;padding:38px;border-radius:var(--radius);background:var(--navy);color:#fff;display:flex;flex-direction:column;justify-content:flex-end}.model-index{margin-bottom:auto;font-family:Georgia,serif;color:var(--gold);font-size:86px;line-height:1}.model-primary h3{margin:0 0 14px;font-size:26px}.model-primary p{max-width:570px;margin:0;color:#b5c4d0;font-size:13px;line-height:1.8}.model-side{display:grid;grid-template-rows:repeat(3,1fr);gap:12px}.model-side article{padding:24px 26px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}.model-side span{font-size:9px;color:var(--gold-dark);font-weight:800}.model-side h3{margin:7px 0;font-size:17px}.model-side p{margin:0;color:var(--muted);font-size:11px;line-height:1.7}
.system-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:72px;align-items:start}.system-intro{position:sticky;top:110px}.system-map{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:12px}.system-core{grid-column:1/-1;padding:28px;border-radius:var(--radius);background:var(--navy);color:#fff}.system-core span{font-family:Georgia,serif;color:var(--gold);font-size:34px}.system-core strong{display:block;margin-top:20px;font-size:20px}.system-core small{display:block;margin-top:6px;color:#aebfcd;font-size:10px}.system-node{min-height:150px;padding:20px;text-align:left;border:1px solid var(--line);border-radius:var(--radius);background:#fff;color:var(--ink);cursor:pointer;transition:border .2s,transform .2s,background .2s}.system-node:hover{transform:translateY(-2px)}.system-node.active{border-color:#d7b56f;background:var(--gold-soft)}.system-node span{display:block;font-size:9px;color:var(--muted)}.system-node strong{display:block;margin-top:34px;font-size:13px;line-height:1.5}.layer-detail{grid-column:2;margin-top:-58px;padding:28px;border-radius:var(--radius);border:1px solid var(--line);background:#fff;box-shadow:0 20px 50px rgba(13,34,58,.08)}.layer-detail span{font-size:9px;color:var(--gold-dark);font-weight:800}.layer-detail h3{margin:10px 0;font-size:19px;line-height:1.45}.layer-detail p{margin:0;color:var(--muted);font-size:11px;line-height:1.75}
.process{border-top:1px solid var(--line)}.process-track{display:grid;grid-template-columns:repeat(4,1fr);gap:0}.process-track article{min-height:320px;padding:28px 24px;border-left:1px solid var(--line);display:flex;flex-direction:column}.process-track article:first-child{border-left:0}.process-track span{font-size:9px;color:var(--gold-dark);font-weight:800}.process-track h3{margin:40px 0 12px;font-size:20px}.process-track p{margin:0;color:var(--muted);font-size:11px;line-height:1.75}.process-track strong{margin-top:auto;padding-top:26px;font-size:10px}
.change-section{background:#eef3f6;max-width:none}.change-section>.section-title,.change-section>.change-table{max-width:1256px;margin-left:auto;margin-right:auto}.change-table{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}.change-table>div{display:grid;grid-template-columns:.5fr 1fr 1fr;gap:26px;padding:19px 24px;border-top:1px solid var(--line);align-items:center}.change-table>div:first-child{border-top:0}.change-head{background:var(--navy);color:#fff}.change-head span{font-size:9px;color:#b4c2cd;font-weight:800}.change-table strong{font-size:11px}.change-table span{font-size:11px;color:#52687c;line-height:1.65}.change-table div span:last-child{color:var(--ink);font-weight:600}
.fit-section{display:grid;grid-template-columns:.9fr 1.1fr;gap:90px;align-items:start}.fit-copy{position:sticky;top:110px}.fit-list{border-top:1px solid var(--line)}.fit-list div{display:grid;grid-template-columns:52px 1fr;gap:20px;padding:24px 0;border-bottom:1px solid var(--line)}.fit-list span{font-family:Georgia,serif;color:var(--gold);font-size:19px}.fit-list p{margin:0;font-size:14px;line-height:1.7}
.assessment{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;padding-top:84px;padding-bottom:84px;border-radius:var(--radius);background:var(--navy);color:#fff}.assessment .eyebrow{color:#e2bf78}.assessment-copy p{color:#afbfcc}.assessment-form{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-content:start}.assessment-form label{font-size:10px;color:#c1ced7;font-weight:700}.assessment-form select,.assessment-form textarea{width:100%;margin-top:7px;padding:12px 13px;border:1px solid #3a566f;border-radius:8px;background:#18344e;color:#fff;outline:none}.assessment-form select:focus,.assessment-form textarea:focus{border-color:var(--gold)}.assessment-form textarea{min-height:116px;resize:vertical}.assessment-form .wide{grid-column:1/-1}.form-note{margin:0;color:#8fa4b5;font-size:9px;text-align:center}
.site-footer{max-width:1440px;margin:0 auto;padding:54px clamp(24px,6vw,92px);display:flex;justify-content:space-between;align-items:center}.site-footer>div{display:flex;align-items:center;gap:10px}.site-footer img{width:34px;height:34px;border-radius:8px}.site-footer span{font-size:12px;font-weight:800}.site-footer small{display:block;color:var(--muted);font-size:8px;margin-top:2px}.site-footer p{margin:0;color:var(--muted);font-size:11px}.toast{position:fixed;left:50%;bottom:24px;z-index:50;max-width:min(520px,calc(100vw - 32px));padding:13px 18px;border-radius:8px;background:var(--navy);color:#fff;font-size:11px;box-shadow:var(--shadow);opacity:0;transform:translate(-50%,20px);pointer-events:none;transition:.25s}.toast.show{opacity:1;transform:translate(-50%,0)}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}.reveal.visible{opacity:1;transform:none}
@media(max-width:1050px){.site-header nav{display:none}.hero{grid-template-columns:1fr;min-height:auto}.profit-canvas{max-width:760px}.system-section{grid-template-columns:1fr}.system-intro,.fit-copy{position:static}.layer-detail{grid-column:1/-1;margin-top:0}.process-track{grid-template-columns:1fr 1fr}.process-track article:nth-child(3){border-left:0;border-top:1px solid var(--line)}.process-track article:nth-child(4){border-top:1px solid var(--line)}.fit-section{grid-template-columns:1fr;gap:44px}.assessment{grid-template-columns:1fr}}
@media(max-width:720px){.site-header{grid-template-columns:1fr auto;padding-inline:18px}.site-header>.button{display:none}.hero{padding:58px 20px 70px;gap:46px}.hero h1{font-size:45px}.hero-copy>p{font-size:15px}.hero-actions{align-items:flex-start;flex-direction:column;gap:16px}.profit-canvas{padding:20px}.canvas-head,.canvas-result{align-items:flex-start;flex-direction:column}.canvas-head strong,.canvas-result strong{text-align:left}.engine-grid{grid-template-columns:1fr}.engine-grid div{min-height:auto;border-left:0;border-top:1px solid #35516a}.engine-grid div:first-child{border-top:0}.engine-grid strong{margin-top:12px}.principle-strip{grid-template-columns:1fr 1fr;padding:0 20px 54px}.principle-strip div:nth-child(3){border-left:0;border-top:1px solid var(--line)}.principle-strip div:nth-child(4){border-top:1px solid var(--line)}.section{padding:78px 20px}.model-grid{grid-template-columns:1fr}.model-primary{min-height:360px;padding:28px}.model-index{font-size:70px}.system-map{grid-template-columns:1fr}.system-core{grid-column:auto}.system-node{min-height:122px}.layer-detail{grid-column:auto}.process-track{grid-template-columns:1fr}.process-track article,.process-track article:nth-child(3),.process-track article:nth-child(4){min-height:260px;border-left:0;border-top:1px solid var(--line)}.process-track article:first-child{border-top:0}.change-table{overflow-x:auto}.change-table>div{min-width:700px}.fit-list div{grid-template-columns:42px 1fr}.assessment{margin-inline:12px;padding:58px 22px}.assessment-form{grid-template-columns:1fr}.assessment-form label,.assessment-form .wide{grid-column:1}.site-footer{padding:42px 20px;align-items:flex-start;flex-direction:column;gap:20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}.button,.system-node,.text-link span{transition:none}}

.header-actions{display:flex;align-items:center;gap:10px}.fde-back{border-color:rgba(255,255,255,.26)}
@media(max-width:700px){.site-header{flex-wrap:wrap;gap:10px;padding:15px 18px}.site-header nav{order:3;width:100%;overflow:auto;justify-content:flex-start}.header-actions{margin-left:auto}.header-actions .button{padding:8px 10px;font-size:11px}}