:root{
  --ink:#071b2d;
  --green:#88a43e;
  --deep:#122216;
  --moss:#eef0df;
  --paper:#fbfaf4;
  --line:rgba(7,27,45,.14);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{max-width:100%;overflow-x:hidden}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,Arial,Helvetica,sans-serif}
a{color:inherit}
.site-header{height:96px;display:grid;grid-template-columns:310px 1fr auto auto;align-items:center;gap:18px;padding:0 6vw;background:#eee9d0;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.brand{text-decoration:none;display:flex;flex-direction:column;gap:6px}
.brand strong{font-size:30px;line-height:.9;letter-spacing:.025em}
.brand span{font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:#56703c;font-weight:800}
.nav{display:flex;justify-content:center;gap:26px;font-size:14px;font-weight:800}
.nav a{text-decoration:none}
.nav a:hover{color:var(--green)}
.header-cta{background:var(--green);color:#fff;text-decoration:none;font-weight:800;padding:18px 28px;border-radius:8px}
.language-toggle{
  appearance:none;
  border:1px solid rgba(7,27,45,.18);
  background:
    linear-gradient(45deg,transparent 50%,var(--ink) 50%) calc(100% - 18px) 50%/6px 6px no-repeat,
    linear-gradient(135deg,var(--ink) 50%,transparent 50%) calc(100% - 14px) 50%/6px 6px no-repeat,
    rgba(255,255,255,.72);
  color:var(--ink);
  border-radius:999px;
  padding:12px 34px 12px 18px;
  font-size:13px;
  font-weight:900;
  line-height:1;
  cursor:pointer;
  min-width:82px;
  height:46px;
  white-space:nowrap;
  box-shadow:0 10px 26px rgba(7,27,45,.08),inset 0 1px 0 rgba(255,255,255,.62);
  transition:border-color .18s ease,background-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.language-toggle:hover{border-color:rgba(136,164,62,.65);background-color:#fff;box-shadow:0 12px 28px rgba(7,27,45,.12),inset 0 1px 0 rgba(255,255,255,.78)}
.language-toggle:focus{outline:3px solid rgba(136,164,62,.24);outline-offset:3px;border-color:var(--green)}
.menu-toggle{display:none}
.hero{min-height:calc(100vh - 96px);display:grid;place-items:center;text-align:center;background:linear-gradient(rgba(10,22,12,.28),rgba(10,22,12,.62)),url("assets/hero-root-system.webp") center/cover}
.hero-copy{width:min(1040px,92vw);padding:90px 0;color:#fff;margin-inline:auto;display:flex;flex-direction:column;align-items:center;text-align:center}
.eyebrow{margin:0 0 16px;text-transform:uppercase;letter-spacing:.16em;font-size:12px;font-weight:900;color:#d5a83b}
h1,h2,h3,p{margin-top:0}
h2,h3,p,strong,span,a{overflow-wrap:anywhere}
.hero h1{font-size:clamp(42px,5.6vw,78px);line-height:1.04;margin:0 auto 26px;text-transform:none;letter-spacing:0;color:#fff;text-shadow:0 3px 26px rgba(0,0,0,.62);word-break:keep-all;overflow-wrap:normal;max-width:980px}
html[lang="zh-CN"] .hero .eyebrow{letter-spacing:.08em;margin-bottom:18px}
html[lang="zh-CN"] .hero h1{max-width:min(920px,90vw);word-break:normal;overflow-wrap:anywhere;text-wrap:balance;margin-bottom:24px}
html[lang="zh-CN"] .hero p{max-width:760px;word-break:normal;overflow-wrap:normal;text-wrap:pretty;margin-bottom:34px}
.hero p{max-width:780px;margin:0 auto 34px;font-size:20px;line-height:1.65;color:#fff;font-weight:700;text-shadow:0 1px 18px rgba(0,0,0,.45)}
.hero-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:58px;padding:0 28px;border-radius:6px;text-decoration:none;font-weight:900;border:0;cursor:pointer;font-size:15px}
.button.dark{background:#070707;color:#fff}
.button.light{background:var(--green);color:#fff}
.audience-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.audience-strip a{display:block;background:#fff;padding:32px 28px;text-decoration:none}
.audience-strip a:hover{background:#f6f4ea}
.audience-strip span{display:block;margin-bottom:10px;text-transform:uppercase;letter-spacing:.12em;font-size:11px;font-weight:900;color:#8a6a18}
.audience-strip strong{display:block;font-size:22px;line-height:1.2;max-width:680px}
.audience-strip p{max-width:640px;margin:14px 0 0;font-size:16px;line-height:1.55;color:rgba(7,27,45,.7)}
.section{padding:96px 6vw}
.section-heading{max-width:860px;margin-bottom:42px}
.section-heading.centered{text-align:center;margin-left:auto;margin-right:auto}
.section-heading h2,.split h2,.contact-card h2{font-size:clamp(38px,5vw,72px);line-height:1.02;letter-spacing:.01em;margin-bottom:20px}
.section-heading p:not(.eyebrow),.split p,.contact-card p{font-size:18px;line-height:1.7;color:rgba(7,27,45,.74)}
.soft{background:#f0eee4}
.proof-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.proof-grid article{background:#ececec;min-height:220px;padding:26px 18px;text-align:center}
.proof-grid span{width:72px;height:72px;margin:0 auto 28px;border-radius:50%;display:grid;place-items:center;background:#fff;color:var(--green);font-size:28px;font-weight:900}
.proof-grid strong{display:block;font-size:20px;margin-bottom:10px}
.proof-grid p{font-size:14px;line-height:1.45;margin:0}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature-grid article,.science-grid article{border:1px solid var(--line);background:#fff;padding:34px;min-height:230px;border-radius:8px}
.feature-grid h3,.science-grid h3{font-size:27px;margin-bottom:14px}
.feature-grid p,.science-grid p{font-size:16px;line-height:1.65;color:rgba(7,27,45,.72);margin:0}
.operation-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:16px}
.operation-grid article{background:#fff;border-radius:8px;overflow:hidden;border:1px solid var(--line)}
.operation-grid img{width:100%;height:190px;object-fit:cover;display:block}
.operation-grid div{padding:22px}
.operation-grid h3{font-size:22px;margin-bottom:10px}
.operation-grid p{font-size:15px;line-height:1.55;color:rgba(7,27,45,.72);margin:0}
.manufacturers{background:#fff}
.manufacturer-split{align-items:center}
.manufacturer-card{background:#f0eee4;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.manufacturer-card img{width:100%;height:360px;object-fit:cover;display:block}
.manufacturer-points{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line)}
.manufacturer-points div{background:#fff;padding:24px 28px}
.manufacturer-points span{display:block;margin-bottom:10px;text-transform:uppercase;letter-spacing:.12em;font-size:11px;font-weight:900;color:rgba(7,27,45,.58)}
.manufacturer-points strong{display:block;font-size:20px;line-height:1.35}
.split{display:grid;grid-template-columns:42% 58%;gap:56px;align-items:start}
.product-photo{width:100%;margin-top:30px;border-radius:10px;display:block;border:1px solid var(--line)}
.product-panel{border-top:2px solid var(--ink)}
.product-panel div{display:grid;grid-template-columns:180px 1fr;gap:24px;padding:22px 0;border-bottom:1px solid var(--line)}
.product-panel strong{font-size:22px}
.product-panel span{line-height:1.6;color:rgba(7,27,45,.72)}
.factory-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.factory-grid article{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.factory-grid img{width:100%;height:260px;object-fit:cover;display:block}
.factory-grid div{padding:24px}
.factory-grid h3{font-size:23px;margin-bottom:10px}
.factory-grid p{font-size:15px;line-height:1.6;color:rgba(7,27,45,.72);margin:0}
.dark{background:#102014;color:#fff}
.dark .eyebrow{color:#d5a83b}
.dark .section-heading p:not(.eyebrow){color:rgba(255,255,255,.72)}
.science-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.science-grid article{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.16)}
.science-grid span{display:block;font:12px monospace;margin-bottom:44px;color:#d5a83b}
.science-grid p{color:rgba(255,255,255,.72)}
.resource-list{border-top:1px solid var(--line)}
.resource-list a{display:grid;grid-template-columns:260px 1fr;padding:26px 0;border-bottom:1px solid var(--line);text-decoration:none}
.resource-list strong{font-size:21px}
.resource-list span{line-height:1.65;color:rgba(7,27,45,.72)}
.spec-table{display:grid;grid-template-columns:repeat(3,1fr);border-top:2px solid var(--ink);border-left:1px solid var(--line)}
.spec-table div{min-height:132px;padding:26px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.spec-table span{display:block;margin-bottom:28px;text-transform:uppercase;letter-spacing:.1em;font-size:11px;font-weight:900;color:rgba(7,27,45,.58)}
.spec-table strong{display:block;font-size:24px;line-height:1.25}
.download-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.contact-card{display:grid;grid-template-columns:minmax(320px,40%) minmax(0,1fr);gap:46px;background:#fff;border-radius:10px;padding:48px;border:1px solid var(--line);align-items:start}
.contact-card a{font-weight:900}
form{display:grid;grid-template-columns:1fr 1fr;gap:20px}
label{display:flex;flex-direction:column;gap:8px;font-size:12px;text-transform:uppercase;letter-spacing:.1em;font-weight:900}
input,select,textarea{width:100%;border:1px solid var(--line);background:#fbfaf4;border-radius:6px;padding:14px;font:16px Arial;color:var(--ink)}
textarea{min-height:130px;resize:vertical}
.wide{grid-column:1/-1}
.footer{display:flex;justify-content:space-between;gap:20px;padding:38px 6vw;background:#071b2d;color:#fff;font-size:14px}
.footer a{text-decoration:none}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:#071b2d;color:#fff;padding:13px 18px;border-radius:4px;opacity:0;pointer-events:none;transition:.2s}
.toast.show{opacity:1;transform:translate(-50%,0)}
.error-page{min-height:100vh;background:#fbfaf4}
.error-shell{min-height:100vh;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:18px;padding:8vw}
.error-brand{margin-bottom:44px}
.error-shell h1{font-size:clamp(42px,6vw,78px);line-height:1.02;margin:0}
.error-shell p:not(.eyebrow){max-width:520px;font-size:18px;line-height:1.7;color:rgba(7,27,45,.72)}
@media(max-width:1050px){
  .site-header{grid-template-columns:1fr auto auto;min-height:86px;height:auto;padding:18px 24px}
  .menu-toggle{display:inline-flex;background:transparent;border:1px solid var(--line);border-radius:4px;padding:10px 14px;font-weight:800}
  .nav,.header-cta{display:none}
  .nav.open{grid-column:1/-1;display:flex;flex-direction:column;align-items:flex-start;gap:16px;padding:20px 0}
  .header-cta.open{grid-column:1/-1;display:inline-flex;width:max-content}
  .proof-grid,.operation-grid,.factory-grid{grid-template-columns:repeat(2,1fr)}
  .audience-strip,.spec-table{grid-template-columns:1fr}
  .split,.contact-card{grid-template-columns:1fr}
}
@media(min-width:1051px) and (max-width:1320px){
  .site-header{grid-template-columns:250px 1fr auto;gap:14px;padding:0 4vw}
  .brand strong{font-size:26px}
  .brand span{font-size:10px;letter-spacing:.2em}
  .nav{gap:16px;font-size:13px}
  .header-cta{display:none}
  .language-toggle{min-width:80px}
}
@media(max-width:720px){
  .site-header{grid-template-columns:minmax(0,1fr) auto auto;padding:14px 18px;gap:10px}
  .brand{min-width:0}
  .brand strong{font-size:24px}.brand span{font-size:9px;letter-spacing:.2em}
  .language-toggle{min-width:76px;height:40px;padding:10px 30px 10px 14px;font-size:12px;background-position:calc(100% - 16px) 50%,calc(100% - 12px) 50%,0 0}
  .menu-toggle{padding:9px 11px;font-size:13px}
  .hero{min-height:calc(100svh - 86px);background-position:center}
  .hero-copy{width:min(100% - 36px,620px);padding:70px 0}
  .hero h1{font-size:clamp(32px,9.2vw,42px);line-height:1.14;margin-bottom:20px;max-width:11em;word-break:normal;overflow-wrap:break-word}
  html[lang="zh-CN"] .hero .eyebrow{margin-bottom:14px}
  html[lang="zh-CN"] .hero h1{max-width:10.8em;word-break:normal;overflow-wrap:anywhere;margin-bottom:18px}
  html[lang="zh-CN"] .hero p{max-width:24em;word-break:normal;overflow-wrap:normal;margin-bottom:26px}
  .hero p{font-size:16px;line-height:1.55;margin-bottom:28px}
  .hero-actions{gap:10px}
  .button{min-height:52px;padding:0 20px;font-size:14px}
  .audience-strip a{padding:28px 22px}
  .audience-strip strong{font-size:21px}
  .audience-strip p{font-size:15px}
  .section{padding:72px 22px}
  .section-heading{margin-bottom:32px}
  .section-heading h2,.split h2,.contact-card h2{font-size:clamp(32px,9vw,42px);line-height:1.08}
  .section-heading p:not(.eyebrow),.split p,.contact-card p{font-size:16px;line-height:1.65}
  .proof-grid,.feature-grid,.operation-grid,.science-grid,.factory-grid{grid-template-columns:1fr}
  .proof-grid article{min-height:auto;padding:24px 20px}
  .proof-grid span{width:58px;height:58px;margin-bottom:20px}
  .feature-grid article,.science-grid article{min-height:auto;padding:26px}
  .operation-grid img{height:210px}
  .operation-grid div{padding:22px}
  .factory-grid img{height:220px}
  .factory-grid div{padding:22px}
  .manufacturer-card img{height:240px}
  .manufacturer-points div{padding:22px}
  .manufacturer-points strong{font-size:18px}
  .product-panel div,.resource-list a{grid-template-columns:1fr;gap:8px}
  .spec-table div{min-height:auto;padding:22px}
  .spec-table span{margin-bottom:18px}
  .spec-table strong{font-size:21px}
  .download-actions{display:grid;grid-template-columns:1fr}
  .contact-card{padding:24px;gap:28px}
  form{grid-template-columns:1fr}
  .footer{flex-direction:column}
}
@media(max-width:430px){
  .site-header{padding:14px 12px;gap:8px}
  .brand strong{font-size:22px}
  .brand span{font-size:8px;letter-spacing:.16em}
  .language-toggle{min-width:70px;height:38px;padding:9px 28px 9px 12px;font-size:12px}
  .menu-toggle{padding:8px 9px;font-size:12px}
  .hero-copy{width:min(100% - 28px,620px)}
  .hero h1{font-size:clamp(30px,8.6vw,36px);max-width:10.5em}
  .hero-actions{display:grid;grid-template-columns:1fr 1fr;width:100%}
  .button{padding:0 14px;min-width:0}
  .proof-grid strong{font-size:20px;line-height:1.25}
}