:root{--blue:#2457ff;--yellow:#ffd84d;--coral:#ff6d5f;--ink:#10131a;--white:#f7f9ff;--line:#cbd3e4;--soft:#eef2ff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--white);color:var(--ink);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif}a{text-decoration:none;color:inherit}button{font:inherit}
.topbar{height:72px;padding:0 4vw;display:flex;align-items:center;justify-content:space-between;border-bottom:2px solid var(--ink);background:var(--white);position:sticky;top:0;z-index:40}.logo{display:flex;align-items:center;gap:10px}.logo span{width:42px;height:42px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:900}.logo strong{font-size:15px}.topbar nav{display:flex;gap:28px;font-size:11px;font-weight:700}.topbar nav a:hover{color:var(--blue)}.menu{display:none;border:0;background:none}.menu i{display:block;width:23px;height:2px;background:#111;margin:6px}
.hero{min-height:calc(100vh - 72px);display:grid;grid-template-columns:1.05fr .95fr;grid-template-rows:1fr auto;border-bottom:2px solid var(--ink)}.hero-left{padding:8vh 6vw;display:flex;flex-direction:column;justify-content:center;background:var(--white)}.kicker,.section-head span,.scope-copy>span,.contact-blue>span{font-size:9px;letter-spacing:2.2px;font-weight:800}.hero h1{font-size:clamp(58px,7vw,105px);line-height:.96;letter-spacing:-5px;margin:18px 0 26px}.hero h1 em{font-style:normal;color:var(--blue)}.hero-left>p{max-width:650px;font-size:14px;line-height:1.9;color:#5e6675}.hero-actions{display:flex;gap:12px;margin-top:30px}.btn{padding:13px 18px;font-size:12px;font-weight:800;border:2px solid var(--ink)}.black{background:var(--ink);color:#fff}.line{background:var(--yellow)}
.hero-right{position:relative;background:var(--blue);overflow:hidden}.hero-code{position:absolute;left:6%;top:8%;font-size:clamp(80px,11vw,170px);line-height:.78;font-weight:900;letter-spacing:-10px;color:#fff}.hero-badge{position:absolute;right:8%;bottom:12%;width:150px;height:150px;border-radius:50%;background:var(--yellow);display:grid;place-items:center;text-align:center;font-size:14px;font-weight:900;transform:rotate(8deg)}.hero-square{position:absolute;border:3px solid #fff}.sq1{width:110px;height:110px;right:10%;top:13%;transform:rotate(18deg)}.sq2{width:60px;height:60px;left:15%;bottom:12%;background:var(--coral);border-color:var(--coral);transform:rotate(-12deg)}
.hero-meta{grid-column:1/-1;display:grid;grid-template-columns:1.4fr 1fr .7fr;background:var(--yellow);border-top:2px solid var(--ink)}.hero-meta span{padding:13px 4vw;border-right:2px solid var(--ink);font-size:10px;font-weight:700}
.about{padding:100px 5vw;display:grid;grid-template-columns:120px 1.2fr .8fr;gap:38px;border-bottom:2px solid var(--ink)}.about-label{font-size:10px;font-weight:900;color:var(--blue)}.about-copy h2,.section-head h2,.scope-copy h2,.contact-blue h2{font-size:42px;line-height:1.15;letter-spacing:-2px;margin:8px 0 20px}.about-copy p{font-size:13px;line-height:1.9;color:#5f6674}.about-facts{display:grid;gap:0;border-top:2px solid var(--ink)}.about-facts div{padding:18px 0;border-bottom:2px solid var(--ink)}.about-facts small{display:block;font-size:8px;color:#6e7582}.about-facts strong{display:block;margin-top:6px;font-size:13px}
.services{padding:100px 5vw;background:var(--soft);border-bottom:2px solid var(--ink)}.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:40px}.section-head h2{margin-bottom:0}.service-track{display:grid;grid-template-columns:repeat(4,1fr);border-top:2px solid var(--ink);border-left:2px solid var(--ink)}.service-track article{min-height:360px;padding:24px;border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);background:#fff;transition:.2s}.service-track article:nth-child(2){background:var(--yellow)}.service-track article:nth-child(3){background:var(--blue);color:#fff}.service-track article:nth-child(4){background:var(--coral)}.service-track article:hover{transform:translateY(-8px)}.num{font-size:54px;font-weight:900}.service-track h3{font-size:24px;margin:70px 0 8px}.service-track p{font-size:11px;line-height:1.8}.service-track span{display:block;margin-top:35px;font-size:8px;letter-spacing:1.8px;font-weight:800}
.process{padding:100px 5vw;border-bottom:2px solid var(--ink)}.stairs{height:520px;display:flex;align-items:flex-end;gap:14px}.step{width:25%;padding:24px;border:2px solid var(--ink);background:#fff}.s1{height:210px}.s2{height:285px;background:var(--yellow)}.s3{height:365px;background:var(--blue);color:#fff}.s4{height:445px;background:var(--ink);color:#fff}.step b{font-size:50px}.step h3{font-size:21px;margin:30px 0 6px}.step p{font-size:11px}
.scope{padding:100px 5vw;background:#11141c;color:#fff;display:grid;grid-template-columns:.85fr 1.15fr;gap:60px}.scope-copy p{color:#9aa4b8;font-size:11px}.scope-tool{display:grid;grid-template-columns:1fr 1fr;border:2px solid #fff}.range-wrap{padding:32px;background:#fff;color:#111}.range-wrap label{display:block;font-size:11px;font-weight:800;margin-bottom:35px}.range-wrap input{width:100%;accent-color:var(--blue)}.range-labels{display:flex;justify-content:space-between;margin-top:12px;font-size:8px;color:#687082}.scope-result{padding:32px;background:var(--blue)}.scope-result small{font-size:8px;letter-spacing:1.8px}.scope-result h3{font-size:28px;margin:15px 0}.scope-result p{font-size:12px;line-height:1.8}.scope-tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:25px}.scope-tags span{padding:7px 9px;border:1px solid rgba(255,255,255,.45);font-size:9px}
.principles{padding:100px 5vw;background:var(--white)}.circle-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.circle-grid article{aspect-ratio:1;border:2px solid var(--ink);border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px}.circle-grid article:nth-child(2){background:var(--yellow)}.circle-grid article:nth-child(3){background:var(--coral)}.circle-grid article:nth-child(4){background:var(--blue);color:#fff}.circle-grid strong{font-size:28px}.circle-grid p{font-size:10px}
.contact{display:grid;grid-template-columns:1fr 1fr;border-top:2px solid var(--ink)}.contact-blue{padding:80px 5vw;background:var(--blue);color:#fff}.contact-blue p{font-size:11px}.contact-white{padding:50px 5vw;background:#fff}.contact-white>div{padding:16px 0;border-bottom:2px solid var(--ink);display:grid;grid-template-columns:110px 1fr;gap:16px}.contact-white small{font-size:8px}.contact-white strong{font-size:11px}
.footer{padding:32px 4vw 20px;background:var(--yellow);border-top:2px solid var(--ink);display:grid;grid-template-columns:1fr 1fr;gap:20px}.footer>div:first-child strong{display:block}.footer>div:first-child span{font-size:9px}.footer>div:nth-child(2){display:flex;justify-content:flex-end;gap:14px;font-size:9px}.footer>small{grid-column:1/-1;border-top:2px solid var(--ink);padding-top:14px}.back{position:fixed;right:18px;bottom:18px;width:44px;height:44px;border:2px solid var(--ink);background:var(--yellow);cursor:pointer;opacity:0;pointer-events:none}.back.show{opacity:1;pointer-events:auto}
@media(max-width:960px){.hero{grid-template-columns:1fr}.hero-right{min-height:520px}.hero-meta{grid-column:1}.about{grid-template-columns:1fr}.service-track{grid-template-columns:1fr 1fr}.scope{grid-template-columns:1fr}.circle-grid{grid-template-columns:1fr 1fr}}
@media(max-width:760px){.topbar{height:68px;padding:0 16px}.topbar nav{position:absolute;top:68px;left:12px;right:12px;display:none;flex-direction:column;background:#fff;border:2px solid var(--ink);padding:16px}.topbar nav.open{display:flex}.menu{display:block}.hero-left{padding:55px 20px}.hero h1{font-size:55px;letter-spacing:-3px}.hero-meta{grid-template-columns:1fr}.about,.services,.process,.scope,.principles{padding-left:20px;padding-right:20px}.service-track{grid-template-columns:1fr}.stairs{height:auto;display:grid}.step,.s1,.s2,.s3,.s4{width:100%;height:auto;min-height:180px}.scope-tool,.contact{grid-template-columns:1fr}.circle-grid{grid-template-columns:1fr}.footer{grid-template-columns:1fr}.footer>div:nth-child(2){justify-content:flex-start}.footer>small{grid-column:1}}