:root{--ink:#141414;--paper:#F3F1EC;--signal:#F2541B;--line:#14141422;--mute:#141414a6;
--sans:Inter,"Noto Sans CJK SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
--mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1296px;margin:0 auto;padding:0 32px}
.eyebrow{font:500 13px/1 var(--mono);letter-spacing:.12em;opacity:.55;text-transform:uppercase}
/* nav */
.nav{position:sticky;top:0;z-index:10;background:rgba(243,241,236,.92);backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid transparent}
.nav-in{height:80px;display:flex;align-items:center;justify-content:space-between}
.brand img{height:44px;display:block;margin-left:-11px}
.links{display:flex;gap:34px;align-items:center;font-size:14px}
.links em{font-style:normal;opacity:.45;margin-left:6px;font-size:12px}
.links .cta{padding:10px 18px;background:var(--ink);color:#fff;border-radius:22px}
/* hero */
.hero{padding-top:70px}
.hero-in{display:flex;justify-content:space-between;align-items:center;gap:48px}
.hero h1{font-weight:700;font-size:74px;line-height:1.16;letter-spacing:-.01em;margin-top:20px}
.lead{font-size:22px;font-weight:600;margin-top:28px;max-width:640px}
.sub{font-size:18px;line-height:1.6;opacity:.7;margin-top:12px;max-width:600px}
.btns{display:flex;gap:14px;margin-top:36px;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 22px;border-radius:26px;font-size:15px}
.btn.dark{background:var(--ink);color:#fff}
.btn.line{box-shadow:inset 0 0 0 1px #14141455}
.hero-pat{width:410px;max-width:40%;flex-shrink:0}
.steps{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);margin-top:80px;padding-bottom:40px}
.steps li{padding:22px 24px 0 0}
.steps span{font:500 12px var(--mono);letter-spacing:.06em}
.steps .on span{color:var(--signal)}
.steps b{display:block;font-size:17px;margin-top:10px}
.steps b i{font-weight:400;font-size:14px;opacity:.5;margin-left:6px;font-style:normal}
.steps p{font-size:13.5px;opacity:.6;margin-top:6px}
/* sections */
.sec{padding:110px 0}
.sec.alt{background:#fff}
.sec h2{font-size:44px;line-height:1.2;font-weight:700;margin-top:16px}
.sec-sub{font-size:17px;opacity:.7;margin-top:16px;max-width:640px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:56px}
.card{background:var(--paper);padding:36px 32px 40px}
.card .no{font:500 12px var(--mono);opacity:.5}
.card h3{font-size:21px;margin-top:14px}
.card p{font-size:15px;opacity:.72;margin-top:12px}
.card ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.card li{font-size:12.5px;padding:5px 12px;border-radius:14px;box-shadow:inset 0 0 0 1px #14141433}
.method{display:grid;grid-template-columns:5fr 7fr;gap:64px}
.mlist{list-style:none;border-top:1px solid var(--line)}
.mlist li{display:flex;gap:28px;padding:28px 0;border-bottom:1px solid var(--line)}
.mlist span{font:500 13px var(--mono);padding-top:6px;min-width:28px}
.mlist h3{font-size:21px}
.mlist p{font-size:15px;opacity:.72;margin-top:6px}
.mlist li.result{background:var(--signal);color:#fff;border-radius:14px;padding:28px 28px;border:none;margin-top:16px}
.mlist li.result p{opacity:.92}
.who{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:56px}
.who div{border-top:2px solid var(--ink);padding-top:20px}
.who h3{font-size:19px}
.who p{font-size:14.5px;opacity:.7;margin-top:8px}
.sec.dark{background:var(--ink);color:#fff}
.about{display:grid;grid-template-columns:5fr 7fr;gap:64px}
.about-txt p{font-size:19px;line-height:1.75;opacity:.88}
.about-txt .pr{margin-top:28px;font-size:24px;font-weight:600;opacity:1}
.about-txt .pr span{font-size:16px;font-weight:400;opacity:.6}
.contact{display:grid;grid-template-columns:7fr 5fr;gap:64px;align-items:end}
.contact-box{background:#fff;border-radius:16px;padding:36px}
.contact-box .k{font:500 12px var(--mono);letter-spacing:.1em;opacity:.5}
.contact-box .v{font-size:22px;font-weight:600;margin:6px 0 20px}
.contact-box .v.addr{font-size:17px;font-weight:500}
.foot{background:var(--ink);color:#fff;padding:48px 0}
.foot-in{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.foot img{height:40px;margin-left:-10px}
.foot-txt{font-size:13px;opacity:.6;text-align:right}
/* responsive */
@media (max-width:1024px){
 .hero h1{font-size:56px}.grid{grid-template-columns:repeat(2,1fr)}.who{grid-template-columns:repeat(2,1fr)}
 .method,.about,.contact{grid-template-columns:1fr;gap:40px}
}
@media (max-width:720px){
 .wrap{padding:0 20px}
 .nav-in{height:64px}.brand img{height:36px;margin-left:-9px}
 .links a:not(.cta){display:none}.links .cta{padding:8px 14px;font-size:13px}
 .hero{padding-top:40px}.hero-in{flex-direction:column;align-items:flex-start;gap:36px}
 .hero h1{font-size:40px}.lead{font-size:18px}.sub{font-size:16px}
 .hero-pat{width:72%;max-width:280px;align-self:center}
 .steps{grid-template-columns:1fr 1fr;margin-top:48px;row-gap:12px}
 .sec{padding:72px 0}.sec h2{font-size:32px}
 .grid{grid-template-columns:1fr;margin-top:36px}.card{padding:28px 24px 32px}
 .who{grid-template-columns:1fr;margin-top:36px}
 .mlist li{gap:16px}.mlist li.result{padding:24px 20px}
 .about-txt p{font-size:17px}.contact-box{padding:28px 24px}.contact-box .v{font-size:20px}
 .foot-txt{text-align:left}
}