:root{
  --c-bg:#ffffff;
  --c-soft:#f5f8f4;
  --c-line:rgba(20,40,20,.08);
  --c-text:#1f2a22;
  --c-text-soft:rgba(31,42,34,.66);
  --c-text-mute:rgba(31,42,34,.5);
  --c-green:#3f7a3a;
  --c-green-deep:#244d22;
  --c-green-soft:#dfeed9;
  --c-yellow:#e5b04a;
  --max:1200px;
  --pad:32px;
  --radius:18px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  line-height:1.6;
  font-size:16px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}

.container{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}

/* ========== Header ========== */
.site-header{
  position:sticky;top:0;z-index:50;
  height:88px;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(140%) blur(14px);
  -webkit-backdrop-filter:saturate(140%) blur(14px);
  border-bottom:1px solid var(--c-line);
}
.site-header .container{
  height:100%;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{display:flex;flex-direction:column;line-height:1}
.brand-cn{font-size:32px;font-weight:600;letter-spacing:.04em;color:var(--c-green-deep)}
.brand-en{font-size:14px;letter-spacing:.45em;color:var(--c-text-mute);margin-top:6px}
.nav{display:flex;gap:36px}
.nav a{
  font-size:16px;color:var(--c-text);
  position:relative;padding:6px 2px;
  transition:color .25s var(--ease);
}
.nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--c-green);transform:scaleX(0);transform-origin:center;
  transition:transform .3s var(--ease);
}
.nav a:hover,.nav a[aria-current="page"]{color:var(--c-green-deep)}
.nav a:hover::after,.nav a[aria-current="page"]::after{transform:scaleX(1)}

.nav-toggle{
  display:none;
  width:40px;height:40px;border:none;background:transparent;cursor:pointer;
  padding:0;
}
.nav-toggle span{
  display:block;width:22px;height:2px;background:var(--c-green-deep);
  margin:5px auto;transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ========== Hero ========== */
.hero{
  position:relative;
  min-height:100vh;
  background:url("images/hero.png") center/cover no-repeat;
  display:flex;align-items:center;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(255,255,255,.86) 0%,rgba(255,255,255,.6) 38%,rgba(255,255,255,0) 62%);
  pointer-events:none;
}
.hero-inner{position:relative;width:100%;padding:140px 0 120px}
.hero-text{max-width:560px}
.hero-title{
  font-size:72px;line-height:1.1;font-weight:700;
  color:var(--c-green-deep);
  margin:0 0 24px;letter-spacing:-.01em;
}
.hero-sub{
  font-size:18px;color:var(--c-text-soft);
  margin:0 0 16px;max-width:480px;
}
.hero-tag{
  font-size:16px;color:var(--c-green);
  letter-spacing:.06em;
}

/* ========== Section base ========== */
.section{padding:120px 0;position:relative}
.section-soft{background:var(--c-soft)}
.section-title{
  font-size:42px;line-height:1.25;font-weight:600;
  color:var(--c-green-deep);margin:0 0 28px;letter-spacing:-.005em;
}
.section-lead{font-size:18px;color:var(--c-text-soft);max-width:520px;margin:0 0 20px}
.section-body p{font-size:16px;color:var(--c-text-soft);margin:0 0 14px}

/* ========== About ========== */
.about{
  background:url("images/about.png") right center/cover no-repeat;
}
.about::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,#fff 0%,rgba(255,255,255,.9) 45%,rgba(255,255,255,.4) 70%,transparent 95%);
  pointer-events:none;
}
.about .container{position:relative}
.about-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:64px;align-items:center}
.about-text{max-width:560px}
.keywords{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.keywords span{
  font-size:14px;color:var(--c-green-deep);
  background:var(--c-green-soft);
  padding:6px 14px;border-radius:999px;
}

/* ========== Product ========== */
.product{
  background:url("images/product.png") center/cover no-repeat;
}
.product::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,#fff 0%,rgba(255,255,255,.88) 45%,rgba(255,255,255,.35) 70%,transparent 95%);
  pointer-events:none;
}
.product .container{position:relative}
.product-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:64px;align-items:center}
.product-text{max-width:560px}
.bullet-list{margin:24px 0 0;padding:0;list-style:none;display:grid;gap:14px}
.bullet-list li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:16px;color:var(--c-text-soft);
}
.bullet-list li::before{
  content:"";flex:none;width:8px;height:8px;border-radius:50%;
  background:var(--c-green);margin-top:10px;
}

/* ========== Values (3 columns) ========== */
.values{
  background:url("images/section.png") center/cover no-repeat;
}
.values::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(255,255,255,.92) 0%,rgba(255,255,255,.78) 60%,rgba(255,255,255,.92) 100%);
  pointer-events:none;
}
.values .container{position:relative}
.values-head{text-align:center;max-width:640px;margin:0 auto 64px}
.values-head .section-title{margin-bottom:18px}
.values-head .section-lead{margin:0 auto}
.values-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.value-card{
  background:rgba(255,255,255,.7);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  padding:36px 32px;
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.value-card:hover{transform:translateY(-4px);box-shadow:0 20px 50px -30px rgba(20,60,20,.25)}
.value-card h3{
  margin:0 0 12px;font-size:20px;font-weight:600;color:var(--c-green-deep);
}
.value-card p{margin:0;font-size:15px;color:var(--c-text-soft);line-height:1.7}
.value-num{
  font-size:13px;letter-spacing:.3em;color:var(--c-green);
  margin-bottom:18px;
}

/* ========== Sub-page hero ========== */
.subhero{
  padding:140px 0 80px;
  background:linear-gradient(180deg,#f5f8f4 0%,#ffffff 100%);
  border-bottom:1px solid var(--c-line);
}
.subhero h1{
  font-size:48px;font-weight:600;color:var(--c-green-deep);
  margin:0 0 16px;letter-spacing:-.005em;
}
.subhero p{font-size:17px;color:var(--c-text-soft);margin:0;max-width:680px}
.subhero .meta{margin-top:18px;font-size:14px;color:var(--c-text-mute)}

.legal{padding:80px 0 120px}
.legal-content{max-width:820px;margin:0 auto}
.legal-content h2{
  font-size:24px;font-weight:600;color:var(--c-green-deep);
  margin:48px 0 16px;letter-spacing:.005em;
}
.legal-content h2:first-child{margin-top:0}
.legal-content h3{font-size:18px;font-weight:600;color:var(--c-text);margin:28px 0 10px}
.legal-content p{font-size:16px;color:var(--c-text-soft);margin:0 0 14px;line-height:1.85}
.legal-content ul{margin:0 0 18px;padding-left:1.2em;color:var(--c-text-soft)}
.legal-content ul li{margin:6px 0;line-height:1.8}
.legal-content .info-block{
  background:var(--c-soft);border-radius:var(--radius);
  padding:24px 28px;margin:24px 0;border:1px solid var(--c-line);
}
.legal-content .info-block p{margin:6px 0}

/* ========== Contact page ========== */
.contact-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;
  max-width:900px;margin:0 auto;
}
.contact-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);
  padding:32px;
}
.contact-card h3{margin:0 0 12px;font-size:18px;color:var(--c-green-deep);font-weight:600}
.contact-card p{margin:6px 0;color:var(--c-text-soft);font-size:15px;line-height:1.8}
.contact-card a{color:var(--c-green);border-bottom:1px solid transparent;transition:border-color .2s}
.contact-card a:hover{border-bottom-color:var(--c-green)}
.contact-list{margin:32px auto 0;max-width:900px}
.contact-list h3{font-size:18px;color:var(--c-green-deep);margin:0 0 12px}
.contact-list ul{display:grid;grid-template-columns:repeat(2,1fr);gap:8px 24px;list-style:none;padding:0;color:var(--c-text-soft)}

/* ========== About page extra ========== */
.profile-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;
  margin:32px 0;
}
.profile-grid .item{
  background:var(--c-soft);border-radius:14px;padding:20px 22px;border:1px solid var(--c-line);
}
.profile-grid .item span{display:block;font-size:13px;color:var(--c-text-mute);margin-bottom:6px;letter-spacing:.05em}
.profile-grid .item strong{font-weight:500;color:var(--c-text);font-size:15px;line-height:1.6}

/* ========== Footer ========== */
.site-footer{
  background:#fafbf9;border-top:1px solid var(--c-line);
  padding:56px 0 28px;color:var(--c-text-soft);
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;margin-bottom:36px;
}
.footer-brand .brand-cn{font-size:24px;color:var(--c-green-deep)}
.footer-brand .brand-en{font-size:12px}
.footer-brand p{font-size:14px;color:var(--c-text-mute);margin:14px 0 0;line-height:1.8}
.footer-col h4{font-size:13px;letter-spacing:.18em;color:var(--c-text-mute);margin:0 0 14px;text-transform:uppercase;font-weight:500}
.footer-col ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--c-text);transition:color .2s}
.footer-col a:hover{color:var(--c-green)}
.footer-bottom{
  padding-top:24px;border-top:1px solid var(--c-line);
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  font-size:13px;color:var(--c-text-mute);
}
.footer-bottom .icp a{color:var(--c-text-mute);margin-left:18px}
.footer-bottom .icp a:hover{color:var(--c-green)}

/* ========== Reveal on scroll ========== */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ========== Responsive: mobile re-layout (not scale) ========== */
@media (max-width:960px){
  :root{--pad:20px}
  .site-header{height:64px}
  .brand-cn{font-size:22px}
  .brand-en{font-size:11px;letter-spacing:.35em;margin-top:4px}
  .nav{
    position:fixed;top:64px;right:0;left:0;
    flex-direction:column;gap:0;
    background:rgba(255,255,255,.98);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--c-line);
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:transform .25s var(--ease),opacity .25s var(--ease);
  }
  .nav a{padding:18px 24px;border-bottom:1px solid var(--c-line)}
  .nav a::after{display:none}
  .nav.open{transform:none;opacity:1;pointer-events:auto}
  .nav-toggle{display:block}

  .hero{
    min-height:auto;
    background-position:center bottom;
    background-size:cover;
  }
  .hero::before{
    background:linear-gradient(180deg,rgba(255,255,255,.95) 0%,rgba(255,255,255,.7) 50%,rgba(255,255,255,.2) 100%);
  }
  .hero-inner{padding:80px 0 60vw}
  .hero-title{font-size:40px;line-height:1.15}
  .hero-sub{font-size:16px}

  .section{padding:72px 0}
  .section-title{font-size:28px}
  .section-lead{font-size:16px}

  .about,.product{
    background-size:cover;background-position:center;
  }
  .about::before,.product::before{
    background:linear-gradient(180deg,rgba(255,255,255,.96) 0%,rgba(255,255,255,.85) 60%,rgba(255,255,255,.4) 100%);
  }
  .about-grid,.product-grid{grid-template-columns:1fr;gap:24px}
  .product-grid .product-visual,
  .about-grid .about-visual{display:none}

  .values-grid{grid-template-columns:1fr;gap:16px}
  .value-card{padding:28px 24px}
  .values-head{margin-bottom:36px}

  .subhero{padding:90px 0 48px}
  .subhero h1{font-size:32px}
  .legal{padding:48px 0 80px}
  .legal-content h2{font-size:20px;margin-top:36px}
  .contact-grid{grid-template-columns:1fr}
  .contact-list ul{grid-template-columns:1fr}
  .profile-grid{grid-template-columns:1fr}

  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px}
  .footer-bottom .icp a{margin-left:0;margin-right:14px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}