:root{
  --canvas:#F5F3EE;--paper:#FFFFFF;--ink:#181A1D;--ink-soft:#3C4147;--muted:#6B7078;
  --accent:#0F6A55;--accent-deep:#0A4A3C;--accent-soft:#E4F0EB;
  --line:rgba(24,26,29,.12);--line-strong:rgba(24,26,29,.22);
  --gut:clamp(20px,4vw,72px);--ease:cubic-bezier(.22,.61,.36,1);
  --nav-height:52px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--canvas);color:var(--ink);
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16.5px;line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
code{font:13.5px/1.6 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#ECE8DF;border-radius:5px;padding:1px 6px}

.navbar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.nav-inner{max-width:1040px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:var(--nav-height)}
.brand{font-size:16px;font-weight:600;color:var(--ink);display:flex;align-items:center;gap:8px}
.brand em{font-style:normal;color:var(--accent)}
.nav-links{display:flex;gap:24px;list-style:none;align-items:center}
.nav-links a{color:var(--muted);font-size:13px;font-weight:400;text-decoration:none;transition:color .15s}
.nav-links a:hover,.nav-links a.active{color:var(--ink);text-decoration:underline;text-underline-offset:3px}
.nav-cta{border:1px solid var(--accent);color:var(--accent) !important;padding:4px 14px;border-radius:2px;font-size:13px;font-weight:500}
.nav-cta:hover{background:var(--accent);color:#fff !important;text-decoration:none}
.menu-toggle{display:none;background:none;border:none;font-size:20px;cursor:pointer;color:var(--ink);padding:4px 8px}
@media(max-width:640px){
  .nav-links{display:none;position:absolute;top:var(--nav-height);left:0;right:0;background:#fff;padding:16px 20px;border-bottom:1px solid var(--line);flex-direction:column;gap:14px;align-items:flex-start}
  .nav-links.mobile-open{display:flex}
  .nav-cta{display:none}
  .nav-links.mobile-open .nav-cta{display:inline-block}
  .menu-toggle{display:block}
}

.hero{display:grid;grid-template-columns:1.05fr .95fr;align-items:stretch;min-height:calc(100svh - var(--nav-height))}
.hero>.txt{padding:60px var(--gut);display:flex;flex-direction:column;justify-content:center}
.hero-art{background:var(--accent-soft);border-left:1px solid var(--line);display:flex;align-items:center;justify-content:center;overflow:hidden}
.hero-art svg{width:100%;height:100%;max-height:640px}
@media(max-width:900px){.hero{grid-template-columns:1fr}.hero-art{border-left:0;border-top:1px solid var(--line);min-height:360px}}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--accent);font-weight:600;background:var(--accent-soft);padding:5px 14px;border-radius:999px;margin-bottom:20px;width:max-content}
.hero h1,.page-hero h1{font-size:clamp(34px,5.4vw,66px);line-height:1.06;font-weight:800;letter-spacing:-.02em;margin-bottom:20px}
.u{color:var(--accent)}
.hero .lead{font-size:clamp(16px,1.5vw,19px);color:var(--ink-soft);max-width:30em;margin-bottom:30px}
.hero-note{margin-top:20px;font-size:13.5px;color:var(--muted);max-width:34em}

.page-hero{max-width:1040px;margin:0 auto;padding:clamp(48px,7vw,80px) var(--gut) clamp(20px,3vw,40px)}
.page-hero p{font-size:clamp(16px,1.5vw,18px);color:var(--ink-soft);max-width:42em}

.section{max-width:1040px;margin:0 auto;padding:clamp(36px,6vw,70px) var(--gut)}
.section.alt{background:var(--paper);border-block:1px solid var(--line);max-width:none}
.section.alt>.inner{max-width:1040px;margin:0 auto;padding:clamp(36px,6vw,70px) var(--gut)}
.sec-head{display:flex;align-items:baseline;gap:16px;margin-bottom:12px;flex-wrap:wrap}
.idx{font:700 14px/1 ui-monospace,Menlo,monospace;color:var(--accent)}
.sec-head h2{font-size:clamp(24px,3vw,36px);font-weight:800;letter-spacing:-.015em}
.sec-sub{color:var(--muted);margin-bottom:32px;max-width:42em}

.btnrow{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:999px;font-weight:600;font-size:15px;transition:transform .2s var(--ease)}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-deep)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line-strong)}
.btn-ghost:hover{border-color:var(--ink)}

.env{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--paper)}
.env>div{padding:28px 30px}
.env>div+div{border-left:1px solid var(--line)}
.env .tag{display:inline-block;font-size:12.5px;font-weight:600;color:var(--accent);background:var(--accent-soft);padding:3px 12px;border-radius:999px;margin-bottom:14px}
.env h3{font-size:18px;margin-bottom:12px}
.env .row{display:flex;gap:12px;padding:8px 0;border-top:1px solid var(--line);font-size:14.5px}
.env .row b{font-weight:600}
.env .row span{color:var(--muted);min-width:74px;flex:none}
@media(max-width:760px){.env{grid-template-columns:1fr}.env>div+div{border-left:0;border-top:1px solid var(--line)}}

.feat{display:grid;grid-template-columns:1fr 1fr;gap:0 48px}
.feat .item{display:grid;grid-template-columns:44px 1fr;gap:16px;padding:20px 0;border-top:1px solid var(--line)}
.feat .n{font:700 15px/1 ui-monospace,Menlo,monospace;color:var(--accent);padding-top:3px}
.feat h3{font-size:17px;margin-bottom:5px}
.feat p{font-size:14.5px;color:var(--ink-soft)}
@media(max-width:760px){.feat{grid-template-columns:1fr}}

.flow{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:26px}
.flow svg{width:100%;height:auto}
.flow-cap{font-size:13px;color:var(--muted);margin-top:12px}

.faq details{border-top:1px solid var(--line);padding:18px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:600;font-size:16px;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:300 24px/1;color:var(--accent);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin-top:10px;color:var(--ink-soft);font-size:15px;max-width:62ch}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:8px}
.steps .st{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:26px}
.steps .n{font:700 14px/1 ui-monospace,Menlo,monospace;color:var(--accent);margin-bottom:10px}
.steps h3{font-size:17px;margin-bottom:6px}
.steps p{font-size:14.5px;color:var(--ink-soft)}
@media(max-width:760px){.steps{grid-template-columns:1fr}}

.cta{background:var(--ink);color:#F5F3EE;border-radius:24px;padding:clamp(36px,5vw,60px);text-align:center}
.cta h2{font-size:clamp(26px,3.5vw,40px);font-weight:800;letter-spacing:-.02em;margin-bottom:12px}
.cta p{color:#B8BEC6;max-width:36em;margin:0 auto 26px}
.cta .btn-primary{background:#fff;color:var(--ink)}
.cta .btn-primary:hover{background:var(--accent-soft)}

footer{border-top:1px solid var(--line);padding:26px var(--gut) 36px;max-width:1040px;margin:40px auto 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13.5px;color:var(--muted)}
footer a{color:var(--accent)}