:root {
  --cream: #f1ebdd;
  --paper: #f8f4ea;
  --ink: #19231c;
  --green: #496b3a;
  --lime: #bedb78;
  --ochre: #b66a38;
  --line: rgba(25, 35, 28, 0.22);
  --pad: clamp(24px, 5vw, 78px);
  --header-h: 86px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
.skip-link { position: fixed; left: 12px; top: -60px; z-index: 1000; padding: 12px 16px; background: white; }
.skip-link:focus { top: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.section-pad { padding-left: var(--pad); padding-right: var(--pad); }

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  padding: 0 var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: white;
  transition: background .35s ease, color .35s ease, box-shadow .35s ease;
}
.site-header.is-scrolled { background: rgba(248,244,234,.94); color: var(--ink); box-shadow: 0 1px 0 var(--line); backdrop-filter: blur(12px); }
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark { width: 42px; height: 42px; flex: 0 0 auto; overflow: visible; }
.brand-mark .ridge, .brand-mark .stem { fill: none; stroke: currentColor; stroke-width: 4; stroke-linecap: round; }
.brand-mark .leaf { fill: var(--lime); stroke: currentColor; stroke-width: 1.8; }
.brand-mark circle { fill: var(--ochre); }
.brand span { display: grid; gap: 3px; }
.brand strong { font-size: 15px; letter-spacing: .04em; }
.brand small { font-size: 10px; letter-spacing: .14em; opacity: .7; }
.site-nav { display: flex; align-items: center; gap: clamp(24px, 3vw, 52px); font-size: 14px; }
.site-nav a { position: relative; padding: 11px 0; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 4px; height: 1px; background: currentColor; transition: right .25s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }
.menu-toggle { display: none; }

.hero { min-height: 100svh; position: relative; display: flex; align-items: flex-end; color: white; overflow: hidden; }
.hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(13,24,17,.78) 0%, rgba(13,24,17,.28) 50%, rgba(13,24,17,.08) 75%), linear-gradient(0deg, rgba(13,24,17,.58), transparent 44%); }
.hero-copy { position: relative; z-index: 2; padding: calc(var(--header-h) + 90px) var(--pad) clamp(100px, 14vh, 160px); max-width: 880px; }
.eyebrow { margin: 0 0 24px; font-size: 12px; font-weight: 700; letter-spacing: .24em; text-transform: uppercase; }
.hero h1, .intro h2, .manufacturing h2, .observation h2, .development h2, .contact h2 {
  margin: 0;
  font-family: "Songti SC", "STSong", Georgia, serif;
  font-weight: 600;
  letter-spacing: -.055em;
}
.hero h1 { font-size: clamp(56px, 7.4vw, 116px); line-height: .98; text-wrap: balance; }
.hero-lead { max-width: 610px; margin: 34px 0 0; font-size: clamp(16px, 1.6vw, 22px); line-height: 1.75; color: rgba(255,255,255,.86); }
.hero-actions { display: flex; align-items: center; gap: 32px; margin-top: 42px; }
.button { min-height: 52px; display: inline-flex; align-items: center; justify-content: center; padding: 0 24px; border: 1px solid transparent; cursor: pointer; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-light { background: var(--cream); color: var(--ink); }
.text-link { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.55); }
.hero-note { position: absolute; z-index: 2; right: var(--pad); bottom: 52px; padding-left: 18px; border-left: 1px solid rgba(255,255,255,.58); display: grid; gap: 7px; }
.hero-note span { font-size: 11px; letter-spacing: .15em; color: rgba(255,255,255,.66); }
.hero-note strong { font-size: 14px; font-weight: 500; }

.intro { padding-top: 120px; padding-bottom: 130px; background: var(--paper); }
.section-index { padding: 0 0 18px; border-bottom: 1px solid var(--line); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; }
.intro-heading { display: grid; grid-template-columns: minmax(0,1.3fr) minmax(280px,.7fr); gap: 9vw; align-items: end; margin: 54px 0 80px; }
.intro h2, .observation h2, .development h2 { font-size: clamp(48px, 6vw, 90px); line-height: 1.04; }
.intro-heading p, .development-title p { margin: 0; font-size: 17px; line-height: 1.9; }
.granule-spread { margin: 0; display: grid; grid-template-columns: minmax(0,1.65fr) minmax(240px,.35fr); align-items: end; }
.granule-spread img { aspect-ratio: 16/8.3; object-fit: cover; }
.granule-spread figcaption { padding: 0 0 14px 30px; }
.granule-spread figcaption span { display: block; margin-bottom: 20px; color: var(--green); font-size: 12px; letter-spacing: .18em; }
.granule-spread figcaption p { margin: 0; line-height: 1.75; }
.direction-lines { margin-top: 90px; border-top: 1px solid var(--line); }
.direction-lines > div { display: grid; grid-template-columns: 80px minmax(180px,.6fr) minmax(280px,1.4fr); gap: 24px; align-items: center; padding: 30px 0; border-bottom: 1px solid var(--line); }
.direction-lines span { color: var(--ochre); font-size: 12px; }
.direction-lines h3, .direction-lines p { margin: 0; }
.direction-lines h3 { font: 500 clamp(28px,3vw,44px)/1.1 "Songti SC",serif; }
.direction-lines p { max-width: 620px; line-height: 1.75; color: rgba(25,35,28,.72); }

.manufacturing { background: var(--ink); color: var(--cream); padding-bottom: 130px; }
.manufacturing-head { padding-top: 110px; padding-bottom: 90px; display: grid; grid-template-columns: 160px 1fr .6fr; gap: 5vw; align-items: end; }
.section-index-light { align-self: start; border-color: rgba(241,235,221,.24); }
.manufacturing h2 { font-size: clamp(52px,7vw,106px); line-height: .96; }
.manufacturing-head > p { margin: 0; font-size: 16px; line-height: 1.9; color: rgba(241,235,221,.7); }
.process { margin: 0 var(--pad); display: grid; min-height: 680px; border-top: 1px solid rgba(241,235,221,.2); }
.process-tower { grid-template-columns: minmax(280px,.6fr) minmax(0,1.4fr); }
.process-blend { grid-template-columns: minmax(0,1.35fr) minmax(280px,.65fr); }
.process img { height: 100%; min-height: 680px; object-fit: cover; }
.process-copy { padding: 58px clamp(28px,5vw,78px); display: flex; flex-direction: column; justify-content: flex-end; }
.process-copy > span { margin-bottom: auto; font-size: 11px; letter-spacing: .2em; color: var(--lime); }
.process-copy h3 { margin: 0 0 28px; font: 500 clamp(44px,5vw,74px)/1 "Songti SC",serif; }
.process-copy p { margin: 0; line-height: 1.9; color: rgba(241,235,221,.72); }
.automation { position: relative; margin: 120px var(--pad) 0; min-height: 640px; display: flex; align-items: flex-end; overflow: hidden; }
.automation img { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.automation::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(12,20,15,.9), rgba(12,20,15,.22) 70%); }
.automation-copy { position: relative; z-index: 1; max-width: 650px; padding: clamp(38px,6vw,90px); }
.automation-copy h3 { margin: 0 0 24px; font: 500 clamp(42px,5vw,72px)/1.08 "Songti SC",serif; }
.automation-copy > p:last-child { margin: 0; max-width: 560px; line-height: 1.85; color: rgba(255,255,255,.75); }

.observation { padding-top: 120px; padding-bottom: 130px; background: var(--cream); }
.observation-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 7vw; align-items: center; padding-top: 70px; }
.observation-copy > p { margin: 32px 0 50px; max-width: 620px; line-height: 1.9; }
.observation-copy dl { margin: 0; border-top: 1px solid var(--line); }
.observation-copy dl > div { display: grid; grid-template-columns: 90px 1fr; gap: 18px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.observation-copy dt { color: var(--ochre); font-size: 12px; }
.observation-copy dd { margin: 0; line-height: 1.6; }
.observation-image { margin: 0; }
.observation-image img { aspect-ratio: 4/5; object-fit: cover; }
.soil-band { position: relative; margin: 120px 0 0; min-height: 610px; overflow: hidden; }
.soil-band img { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.soil-band::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(18,30,21,.72), transparent 55%); }
.soil-band figcaption { position: absolute; z-index: 1; left: 0; right: 0; bottom: 0; padding: 38px clamp(28px,4vw,60px); color: white; display: flex; justify-content: space-between; gap: 40px; border-top: 1px solid rgba(255,255,255,.35); }
.soil-band figcaption strong { font: 500 30px/1.2 "Songti SC",serif; }
.soil-band figcaption span { max-width: 520px; line-height: 1.7; color: rgba(255,255,255,.75); }

.development { padding-top: 120px; padding-bottom: 130px; }
.development-title { display: grid; grid-template-columns: 1.2fr .8fr; gap: 8vw; align-items: end; margin: 60px 0 90px; }
.timeline { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.timeline li { display: grid; grid-template-columns: minmax(120px,.35fr) 1.65fr; gap: 7vw; padding: 38px 0 44px; border-bottom: 1px solid var(--line); }
.timeline time { font: 500 clamp(32px,4vw,58px)/1 "Songti SC",serif; color: var(--green); }
.timeline h3 { margin: 0 0 14px; font-size: clamp(22px,2.2vw,34px); font-weight: 500; }
.timeline p { margin: 0; max-width: 760px; line-height: 1.8; color: rgba(25,35,28,.7); }

.contact { position: relative; color: white; min-height: 900px; display: flex; align-items: center; overflow: hidden; }
.contact > img { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.contact-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(16,28,20,.94), rgba(16,28,20,.58)); }
.contact-inner { position: relative; z-index: 1; width: 100%; display: grid; grid-template-columns: .8fr 1.2fr; gap: 9vw; align-items: end; padding-top: 120px; padding-bottom: 120px; }
.contact h2 { font-size: clamp(52px,6vw,92px); line-height: 1.02; }
.contact-copy > p:last-child { max-width: 520px; margin: 34px 0 0; line-height: 1.9; color: rgba(255,255,255,.76); }
.inquiry-form { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 22px; }
.inquiry-form label { display: grid; gap: 10px; }
.inquiry-form label span { font-size: 12px; letter-spacing: .12em; color: rgba(255,255,255,.72); }
.inquiry-form input, .inquiry-form textarea { width: 100%; border: 0; border-bottom: 1px solid rgba(255,255,255,.55); border-radius: 0; padding: 10px 0 14px; background: transparent; color: white; outline: none; resize: vertical; }
.inquiry-form input:focus, .inquiry-form textarea:focus { border-color: var(--lime); box-shadow: 0 1px 0 var(--lime); }
.inquiry-form textarea::placeholder { color: rgba(255,255,255,.44); }
.field-wide { grid-column: 1 / -1; }
.form-actions { display: flex; align-items: center; gap: 24px; min-height: 58px; }
.button-ochre { background: var(--ochre); color: white; }
.form-status { margin: 0; font-size: 14px; line-height: 1.5; color: var(--lime); }

.site-footer { padding: 60px var(--pad) 38px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; background: var(--ink); color: var(--cream); border-top: 1px solid rgba(241,235,221,.16); }
.brand-footer { align-self: start; }
.site-footer nav { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 48px; font-size: 14px; }
.creative-note, .copyright { margin: 0; padding-top: 28px; border-top: 1px solid rgba(241,235,221,.2); font-size: 11px; letter-spacing: .1em; color: rgba(241,235,221,.62); }
.copyright { text-align: right; }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .75s ease, transform .75s cubic-bezier(.2,.7,.2,1); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .reveal { opacity: 1; transform: none; transition: none; } }

@media (max-width: 980px) {
  :root { --header-h: 76px; }
  .menu-toggle { position: relative; z-index: 3; display: grid; place-content: center; gap: 7px; width: 48px; height: 48px; border: 0; background: transparent; color: inherit; }
  .menu-toggle i { display: block; width: 25px; height: 1.5px; background: currentColor; transition: transform .25s ease; }
  .menu-toggle[aria-expanded="true"] i:first-of-type { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] i:last-of-type { transform: translateY(-4px) rotate(-45deg); }
  .site-nav { position: fixed; inset: 0; z-index: 2; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; gap: 12px; padding: 120px var(--pad) 60px; background: var(--ink); color: var(--cream); transform: translateX(100%); transition: transform .32s ease; }
  .site-nav.is-open { transform: none; }
  .site-nav a { width: 100%; padding: 18px 0; border-bottom: 1px solid rgba(241,235,221,.2); font: 500 clamp(28px,6vw,48px)/1.1 "Songti SC",serif; }
  .intro-heading, .development-title, .manufacturing-head, .contact-inner { grid-template-columns: 1fr; }
  .manufacturing-head { gap: 34px; }
  .granule-spread { grid-template-columns: 1fr; }
  .granule-spread figcaption { padding: 26px 0 0; max-width: 620px; }
  .process, .process-tower, .process-blend { grid-template-columns: 1fr; min-height: 0; }
  .process img { min-height: 0; aspect-ratio: 16/10; }
  .process-blend .process-copy { order: -1; }
  .process-copy > span { margin-bottom: 70px; }
  .observation-grid { grid-template-columns: 1fr; }
  .observation-image img { aspect-ratio: 16/10; }
  .contact { min-height: 1050px; }
  .site-footer { grid-template-columns: 1fr; gap: 42px; }
  .copyright { text-align: left; }
}

@media (max-width: 640px) {
  :root { --pad: 20px; }
  .brand small { display: none; }
  .brand strong { font-size: 13px; }
  .brand-mark { width: 36px; height: 36px; }
  .hero-copy { padding-bottom: 120px; }
  .hero h1 { font-size: clamp(48px,15vw,68px); }
  .hero-lead { font-size: 15px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 15px; }
  .hero-note { display: none; }
  .intro, .observation, .development { padding-top: 84px; padding-bottom: 90px; }
  .intro-heading { margin: 42px 0 54px; gap: 28px; }
  .intro h2, .observation h2, .development h2 { font-size: clamp(44px,13vw,62px); }
  .granule-spread img { aspect-ratio: 4/3; }
  .direction-lines { margin-top: 64px; }
  .direction-lines > div { grid-template-columns: 42px 1fr; align-items: start; }
  .direction-lines p { grid-column: 2; }
  .manufacturing { padding-bottom: 80px; }
  .manufacturing-head { padding-top: 82px; padding-bottom: 60px; }
  .process { margin: 0; }
  .process-copy { padding: 42px 20px 60px; }
  .process img { aspect-ratio: 4/3; }
  .automation { margin: 80px 0 0; min-height: 720px; }
  .automation::after { background: linear-gradient(0deg, rgba(12,20,15,.95), rgba(12,20,15,.12) 80%); }
  .automation-copy { padding: 36px 20px; }
  .soil-band { margin-top: 80px; min-height: 640px; }
  .soil-band figcaption { flex-direction: column; gap: 14px; }
  .timeline li { grid-template-columns: 1fr; gap: 22px; }
  .contact { min-height: 1100px; align-items: flex-start; }
  .contact-inner { padding-top: 90px; padding-bottom: 90px; gap: 70px; }
  .inquiry-form { grid-template-columns: 1fr; }
  .field-wide { grid-column: auto; }
  .form-actions { align-items: flex-start; flex-direction: column; }
  .button-ochre { width: 100%; }
  .site-footer nav { grid-template-columns: 1fr; }
}