:root{--ink:#173326;--muted:#5e7168;--paper:#f3f8f3;--white:#fff;--line:#d7e5d8;--green:#2f8f46;--leaf:#8bbf45;--deep:#10251a}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;color:var(--ink);background:var(--paper)}a{color:inherit;text-decoration:none}
.site-header{position:fixed;top:0;left:0;right:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:18px clamp(18px,5vw,64px);color:#fff;transition:180ms ease}.site-header.is-scrolled{color:var(--ink);background:rgba(243,248,243,.94);box-shadow:0 12px 30px rgba(18,50,31,.12);backdrop-filter:blur(14px)}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:900;white-space:nowrap}.brand-mark{display:grid;place-items:center;width:40px;height:40px;color:#fff;background:linear-gradient(145deg,var(--green),var(--leaf));border-radius:8px 22px 8px 22px;font-size:13px}.nav-links{display:flex;gap:26px;font-size:14px;font-weight:700}.header-action,.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:4px;border:0;font-weight:800;cursor:pointer}.header-action,.button.primary{color:#fff;background:var(--green)}.button.secondary{color:#fff;border:1px solid rgba(255,255,255,.55)}
.hero{position:relative;min-height:90vh;display:flex;align-items:center;overflow:hidden;color:#fff;background:var(--deep)}.hero:after{content:"";position:absolute;left:0;right:0;bottom:0;height:110px;background:linear-gradient(180deg,transparent,var(--paper))}.hero-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(13,35,23,.92),rgba(13,35,23,.62) 50%,rgba(13,35,23,.08))}.hero-content{position:relative;z-index:1;width:min(720px,calc(100% - 36px));margin-left:clamp(18px,7vw,92px);padding-top:78px}.eyebrow,.section-label{margin:0 0 14px;color:#aee37b;font-size:13px;font-weight:900;letter-spacing:.06em}
h1,h2,h3,p{margin-top:0}h1{margin-bottom:22px;font-size:clamp(42px,7vw,86px);line-height:1;letter-spacing:0}h2{margin-bottom:18px;font-size:clamp(28px,4vw,50px);line-height:1.08;letter-spacing:0}h3{margin-bottom:12px;font-size:21px}p{color:var(--muted);line-height:1.76}.hero-copy{max-width:650px;color:rgba(255,255,255,.85);font-size:20px}.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;width:min(1120px,calc(100% - 36px));margin:0 auto 0;position:relative;z-index:2}.metrics div{padding:28px;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 12px 28px rgba(23,51,38,.08)}.metrics strong{display:block;margin-bottom:8px;color:var(--green);font-size:28px}.metrics span{font-size:14px;color:var(--muted)}
.section,.platform,.contact{padding:clamp(72px,9vw,116px) clamp(18px,6vw,76px)}.intro{display:grid;grid-template-columns:240px 1fr;gap:42px;background:var(--paper)}.intro .section-label,.section-heading .section-label,.contact .section-label{color:var(--green)}.intro p,.platform-copy p,.contact p{max-width:780px;font-size:18px}.section-heading{max-width:760px;margin-bottom:34px}
.service-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.service-card{min-height:210px;padding:28px;background:#fff;border:1px solid var(--line);border-radius:8px}.service-card:nth-child(odd){border-left:7px solid var(--green)}.service-card:nth-child(even){border-left:7px solid var(--leaf)}.icon{display:inline-flex;margin-bottom:26px;color:var(--green);font-weight:900}
.platform{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;color:#fff;background:linear-gradient(135deg,#10251a,#235f35)}.platform p{color:rgba(255,255,255,.75)}.timeline{display:grid;gap:14px}.timeline div{padding:26px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);border-radius:8px}.timeline span{display:block;margin-bottom:8px;color:#d7ffad;font-weight:900}
.work-list{display:grid;grid-template-columns:1fr 1fr 1fr;gap:18px}.work-list article{min-height:230px;padding:28px;background:#fff;border-radius:8px;border:1px solid var(--line)}.contact{display:grid;grid-template-columns:minmax(0,.95fr) minmax(320px,.75fr);gap:48px;background:#fff}.contact-info{margin-top:28px;padding-top:22px;border-top:1px solid var(--line)}.contact-info p{margin-bottom:10px;font-size:16px}.contact-info strong{color:var(--ink)}
.contact-form{display:grid;gap:16px;padding:28px;background:var(--paper);border:1px solid var(--line);border-radius:8px}label{display:grid;gap:8px;font-size:14px;font-weight:800}input,textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:14px 15px;font:inherit;background:#fff}textarea{resize:vertical}.form-note{min-height:24px;margin:0;color:var(--green);font-size:14px;font-weight:800}
.site-footer{padding:28px clamp(18px,6vw,76px);color:rgba(255,255,255,.72);background:var(--deep)}.footer-links,.footer-bottom{display:flex;align-items:center;flex-wrap:wrap;gap:16px}.footer-links{margin-bottom:18px;padding-bottom:18px;border-bottom:1px solid rgba(255,255,255,.14);font-size:14px}.footer-links span{color:#fff;font-weight:800}.footer-bottom{justify-content:space-between}
@media(max-width:900px){.nav-links{display:none}.metrics,.service-grid,.intro,.platform,.work-list,.contact{grid-template-columns:1fr}.hero{min-height:84vh}.service-card,.work-list article{min-height:auto}}@media(max-width:560px){.site-header{padding:14px 16px}.brand span:last-child{max-width:126px;white-space:normal;line-height:1.05}.header-action{padding:0 12px;font-size:13px}.hero-content{width:calc(100% - 32px);margin-left:16px}.hero-copy{font-size:17px}.section,.platform,.contact,.metrics div{padding-left:16px;padding-right:16px}.footer-bottom{flex-direction:column;align-items:flex-start}}

.emission-lab {
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: 24px;
  padding: clamp(50px, 7vw, 82px) clamp(18px, 6vw, 76px);
  background: #fff;
}
.lab-card {
  padding: 34px;
  color: #fff;
  background: linear-gradient(135deg, var(--deep), var(--green));
  border-radius: 8px 36px 8px 36px;
}
.lab-card span {
  color: #d7ffad;
  font-weight: 900;
}
.lab-card h2 {
  margin-bottom: 0;
}
.lab-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.lab-grid article {
  min-height: 160px;
  padding: 22px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 50px 50px 8px 8px;
  text-align: center;
  font-weight: 900;
}
@media(max-width:900px){.emission-lab,.lab-grid{grid-template-columns:1fr}.lab-grid article{min-height:auto;border-radius:8px}}