:root {
  --paper: #f7f1e6;
  --ink: #1f2723;
  --forest: #12372a;
  --leaf: #4f6944;
  --coral: #a54429;
  --coral-light: #f09b7c;
  --aqua: #cde9e7;
  --line: rgba(31, 39, 35, 0.2);
  --page: min(1180px, calc(100vw - 96px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button, a, input, textarea { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--coral); outline-offset: 4px; }

.skip-link {
  position: fixed;
  top: -100px;
  left: 12px;
  z-index: 200;
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 14px;
  color: #fff;
  background: var(--forest);
  transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 20;
  height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(36px, calc((100vw - 1400px) / 2));
  color: #fff;
  background: #0b241b;
  border-bottom: 1px solid rgba(255,255,255,.26);
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; min-height: 44px; }
.brand-mark {
  position: relative;
  width: 43px;
  height: 28px;
  border: 2px solid currentColor;
  border-bottom: 0;
  border-radius: 24px 24px 0 0;
  flex: 0 0 auto;
}
.brand-mark::after {
  content: "";
  position: absolute;
  left: 17px;
  top: 5px;
  width: 8px;
  height: 13px;
  background: currentColor;
  border-radius: 60% 60% 70% 70%;
  transform: rotate(12deg);
}
.brand-mark span {
  position: absolute;
  left: 4px;
  right: 4px;
  bottom: -6px;
  height: 2px;
  background: currentColor;
}
.brand-name { font-weight: 700; letter-spacing: .04em; white-space: nowrap; }
.brand-name span { font-weight: 400; }
.site-nav { display: flex; gap: 30px; font-size: 14px; }
.site-nav a { position: relative; padding: 8px 0; }
.site-nav a::after {
  content: "";
  position: absolute;
  inset: auto 0 3px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .3s ease;
}
.site-nav a:hover::after, .site-nav a:focus-visible::after { transform: scaleX(1); transform-origin: left; }
.menu-toggle { display: none; }

.hero {
  position: relative;
  min-height: 760px;
  height: min(92vh, 900px);
  color: #fff;
  background: var(--forest);
  overflow: hidden;
}
.hero > img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-wash {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(12,35,27,.85) 0%, rgba(12,35,27,.44) 43%, rgba(12,35,27,.04) 72%);
}
.hero-copy { position: absolute; left: max(48px, calc((100vw - 1180px) / 2)); top: 50%; width: min(740px, 54vw); transform: translateY(-43%); }
.eyebrow { margin: 0 0 22px; font-size: 12px; font-weight: 700; letter-spacing: .22em; text-transform: uppercase; }
.hero h1 { margin: 0; font-family: SimSun, "Songti SC", serif; font-size: clamp(48px, 4.8vw, 74px); font-weight: 500; line-height: 1.18; letter-spacing: -.035em; }
.hero-copy > p:not(.eyebrow) { max-width: 530px; margin: 30px 0 34px; font-size: 17px; }
.text-link { display: inline-flex; gap: 28px; align-items: center; min-height: 44px; padding: 8px 0 9px; border-bottom: 1px solid currentColor; font-weight: 700; }
.hero .text-link span { color: var(--coral-light); }
.hero-index { position: absolute; right: 38px; bottom: 28px; margin: 0; font-size: 12px; letter-spacing: .18em; writing-mode: vertical-rl; }

.paper-section { position: relative; width: var(--page); margin: 0 auto; padding: 132px 0; }
.section-index { position: absolute; top: 139px; left: -72px; font-size: 11px; letter-spacing: .12em; color: var(--coral); writing-mode: vertical-rl; }
.section-index::after { content: ""; display: inline-block; width: 1px; height: 46px; margin-top: 12px; background: currentColor; }
.section-heading { display: grid; grid-template-columns: 2fr 7fr; gap: 44px; align-items: start; }
.section-heading .eyebrow { padding-top: 10px; color: var(--leaf); }
.section-heading h2 { margin: 0; max-width: 850px; font-family: SimSun, "Songti SC", serif; font-size: clamp(38px, 4.5vw, 66px); font-weight: 500; line-height: 1.18; letter-spacing: -.03em; }

.positioning-body { display: grid; grid-template-columns: 4fr 5fr; gap: 80px; margin: 86px 0 0 22%; padding-top: 40px; border-top: 1px solid var(--line); }
.lead { margin: 0; font-family: SimSun, "Songti SC", serif; font-size: clamp(23px, 2.2vw, 31px); line-height: 1.58; }
.fact-lines p { display: grid; grid-template-columns: 105px 1fr; gap: 24px; margin: 0; padding: 15px 0; border-bottom: 1px solid var(--line); }
.fact-lines span { color: var(--leaf); font-size: 13px; letter-spacing: .08em; }
.coconut-line { position: absolute; right: 1%; bottom: 20px; width: 210px; height: 104px; border: 1px solid var(--coral); border-bottom: 0; border-radius: 120px 120px 0 0; opacity: .55; }
.coconut-line span { position: absolute; left: 50%; top: 31%; width: 15px; height: 25px; border-radius: 70%; background: var(--coral); transform: translateX(-50%); }

.products { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(440px, .92fr); min-height: 850px; background: var(--forest); color: #fff; }
.products-media { min-height: 760px; }
.products-media img { width: 100%; height: 100%; object-fit: cover; }
.products-copy { position: relative; padding: 110px clamp(44px, 6vw, 100px); }
.products-copy .section-index { left: 22px; top: 118px; color: var(--aqua); }
.products-copy .section-heading { display: block; }
.products-copy .section-heading .eyebrow { color: var(--aqua); }
.products-copy .section-heading h2 { font-size: clamp(38px, 3.8vw, 61px); }
.product-list { list-style: none; margin: 64px 0 0; padding: 0; border-top: 1px solid rgba(255,255,255,.28); }
.product-list li { display: grid; grid-template-columns: 48px 1.05fr 1.6fr; gap: 18px; align-items: baseline; padding: 17px 0; border-bottom: 1px solid rgba(255,255,255,.2); }
.product-list li > span { color: var(--coral-light); font-size: 12px; }
.product-list strong { font-family: SimSun, "Songti SC", serif; font-size: 22px; font-weight: 500; }
.product-list p { margin: 0; color: rgba(255,255,255,.72); font-size: 14px; }

.research-feature { display: grid; grid-template-columns: 5.5fr 2.4fr 3.3fr; gap: 28px; align-items: start; margin-top: 84px; }
figure { margin: 0; }
.research-primary img, .research-secondary img { width: 100%; object-fit: cover; }
.research-primary img { aspect-ratio: 4/3; }
.research-secondary { margin-top: 160px; }
.research-secondary img { aspect-ratio: 4/5; }
figcaption { margin-top: 13px; font-size: 13px; color: var(--leaf); }
.research-primary figcaption { display: flex; justify-content: space-between; gap: 18px; }
.research-primary figcaption span { color: var(--coral); }
.research-note { padding: 26px 0; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); }
.research-note .number { margin: 0 0 52px; color: var(--coral); font-size: 12px; }
.research-note h3 { margin: 0 0 22px; font-family: SimSun, "Songti SC", serif; font-size: 28px; font-weight: 500; line-height: 1.35; }
.research-note > p:last-child { margin: 0; font-size: 14px; }

.manufacturing { border-top: 1px solid var(--line); }
.manufacturing-intro { padding-bottom: 72px; }
.manufacturing-intro .intro-note { width: 48%; margin: 44px 0 0 auto; color: var(--leaf); }
.process-strip { display: grid; grid-template-columns: 1fr 420px 1fr; background: #e5ded2; }
.process-image { min-height: 570px; }
.process-image img { width: 100%; height: 100%; object-fit: cover; }
.process-image figcaption { margin: 0; padding: 12px 20px; color: var(--ink); border-top: 1px solid var(--line); }
.process-steps { list-style: none; margin: 0; padding: 42px 36px; background: var(--ink); color: #fff; }
.process-steps li { display: grid; grid-template-columns: 38px 1fr; gap: 20px; padding: 28px 0; border-bottom: 1px solid rgba(255,255,255,.18); }
.process-steps span { color: var(--coral-light); font-size: 12px; }
.process-steps p { margin: 0; color: rgba(255,255,255,.7); font-size: 14px; }
.process-steps strong { display: block; margin-bottom: 5px; color: #fff; font-family: SimSun, "Songti SC", serif; font-size: 22px; font-weight: 500; }

.quality { display: grid; grid-template-columns: 4fr 7fr; gap: 90px; align-items: end; }
.quality-copy .section-heading { display: block; }
.quality-copy .section-heading h2 { font-size: clamp(36px, 4vw, 58px); }
.quality-copy > p { margin: 42px 0 0; color: var(--leaf); }
.quality-media img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }

.responsibility { position: relative; min-height: 760px; color: #fff; background: var(--forest); overflow: hidden; }
.responsibility > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.responsibility-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(14,38,29,.9), rgba(14,38,29,.45) 52%, rgba(14,38,29,.05)); }
.responsibility-copy { position: relative; z-index: 1; width: var(--page); margin: 0 auto; padding: 150px 48% 120px 0; }
.responsibility-copy .eyebrow { color: var(--aqua); }
.responsibility h2 { margin: 0; font-family: SimSun, "Songti SC", serif; font-size: clamp(42px, 5vw, 76px); font-weight: 500; line-height: 1.22; letter-spacing: -.035em; }
.responsibility-copy > p:last-child { margin: 36px 0 0; color: rgba(255,255,255,.78); }
.responsibility-index { position: absolute; z-index: 1; right: 40px; bottom: 30px; writing-mode: vertical-rl; letter-spacing: .18em; }

.cooperation-body { display: grid; grid-template-columns: 5fr 3fr; gap: 100px; margin: 78px 0 0 22%; padding-top: 42px; border-top: 1px solid var(--line); }
.cooperation-body > p:last-child { margin: 0; color: var(--leaf); }

.contact { display: grid; grid-template-columns: 4fr 6fr; gap: 100px; padding: 120px max(48px, calc((100vw - 1180px) / 2)); color: #fff; background: var(--forest); }
.contact-intro h2 { margin: 0; font-family: SimSun, "Songti SC", serif; font-size: clamp(42px, 4.4vw, 67px); font-weight: 500; line-height: 1.2; }
.contact-intro > p:last-child { max-width: 430px; margin: 30px 0 0; color: rgba(255,255,255,.72); }
.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 32px 28px; align-content: start; }
.contact-form label { display: block; }
.contact-form label > span { display: block; margin-bottom: 9px; color: var(--aqua); font-size: 13px; }
.contact-form input, .contact-form textarea { width: 100%; padding: 11px 0; color: #fff; background: transparent; border: 0; border-bottom: 1px solid rgba(255,255,255,.42); border-radius: 0; resize: vertical; }
.contact-form .full { grid-column: 1 / -1; }
.form-action { display: flex; align-items: center; gap: 26px; }
.form-action button { min-width: 160px; padding: 14px 20px; color: var(--forest); background: var(--aqua); border: 0; cursor: pointer; font-weight: 700; }
.form-action button span { margin-left: 20px; color: var(--forest); }
.form-status { margin: 0; color: #fff; font-size: 14px; }

.site-footer { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 20px; padding: 34px max(36px, calc((100vw - 1180px) / 2)); color: rgba(255,255,255,.62); background: #0b241b; font-size: 12px; }
.site-footer p { margin: 0; }
.footer-brand { display: inline-flex; align-items: center; min-height: 44px; color: #fff; font-weight: 700; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1080px) {
  :root { --page: min(900px, calc(100vw - 64px)); }
  .site-nav { gap: 18px; }
  .products { grid-template-columns: 1fr; }
  .products-media { min-height: 580px; max-height: 720px; }
  .products-copy { padding-left: 12vw; }
  .research-feature { grid-template-columns: 5fr 3fr; }
  .research-secondary { grid-column: 2; margin-top: -60px; }
  .research-note { grid-column: 2; grid-row: 1; }
  .process-strip { grid-template-columns: 1fr 360px; }
  .process-image:last-child { grid-column: 1 / -1; max-height: 540px; }
  .quality { gap: 48px; }
  .contact { gap: 60px; }
}

@media (max-width: 760px) {
  :root { --page: calc(100vw - 40px); }
  .site-header { position: absolute; height: 76px; padding: 0 20px; }
  .brand-name { font-size: 14px; }
  .brand-name span { display: none; }
  .brand-mark { width: 35px; height: 23px; }
  .brand-mark::after { left: 13px; top: 4px; }
  .menu-toggle { display: flex; align-items: center; gap: 10px; min-height: 44px; padding: 8px 0; color: #fff; background: transparent; border: 0; cursor: pointer; }
  .menu-toggle i, .menu-toggle i::after { display: block; width: 20px; height: 1px; background: currentColor; transition: transform .25s ease; }
  .menu-toggle i { position: relative; }
  .menu-toggle i::after { content: ""; position: absolute; top: 6px; }
  .menu-toggle[aria-expanded="true"] i { transform: translateY(3px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] i::after { top: 0; transform: rotate(90deg); }
  .site-nav { position: fixed; inset: 76px 0 auto; display: grid; gap: 0; padding: 10px 20px 22px; color: #fff; background: var(--forest); border-top: 1px solid rgba(255,255,255,.2); transform: translateY(-140%); opacity: 0; pointer-events: none; transition: transform .3s ease, opacity .3s ease; }
  .site-nav.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .site-nav a { padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,.16); }
  .hero { min-height: 700px; height: 100svh; }
  .hero > img { object-position: 63% center; }
  .hero-wash { background: linear-gradient(0deg, rgba(12,35,27,.92) 0%, rgba(12,35,27,.56) 58%, rgba(12,35,27,.12)); }
  .hero-copy { left: 20px; right: 20px; top: auto; bottom: 70px; width: auto; transform: none; }
  .hero h1 { font-size: clamp(41px, 12vw, 58px); }
  .hero-copy > p:not(.eyebrow) { margin: 22px 0 25px; font-size: 15px; }
  .hero-index { right: 16px; bottom: 18px; }
  .paper-section { padding: 88px 0; }
  .section-index { display: none; }
  .section-heading { display: block; }
  .section-heading h2 { font-size: clamp(35px, 10vw, 50px); }
  .positioning-body { grid-template-columns: 1fr; gap: 42px; margin: 50px 0 0; padding-top: 28px; }
  .fact-lines p { grid-template-columns: 74px 1fr; gap: 14px; }
  .coconut-line { right: 0; bottom: 2px; width: 130px; height: 64px; }
  .products { display: block; }
  .products-media { min-height: 330px; height: 52vh; }
  .products-copy { padding: 72px 20px 84px; }
  .product-list { margin-top: 44px; }
  .product-list li { grid-template-columns: 34px 1fr; gap: 10px; }
  .product-list li p { grid-column: 2; }
  .research-feature { display: block; margin-top: 54px; }
  .research-note { margin: 36px 0; }
  .research-note .number { margin-bottom: 24px; }
  .research-secondary { margin-top: 0; }
  .research-secondary img { aspect-ratio: 4/3; }
  .research-primary figcaption { display: block; }
  .research-primary figcaption span { display: block; }
  .manufacturing-intro { padding-bottom: 52px; }
  .manufacturing-intro .intro-note { width: auto; margin-top: 30px; }
  .process-strip { display: flex; flex-direction: column; }
  .process-image { min-height: 0; }
  .process-image img { aspect-ratio: 4/3; }
  .process-steps { order: 2; padding: 24px 20px 34px; }
  .process-image:last-child { order: 3; max-height: none; }
  .quality { display: flex; flex-direction: column; gap: 44px; align-items: stretch; }
  .quality-copy > p { margin-top: 28px; }
  .responsibility { min-height: 680px; }
  .responsibility > img { object-position: 62% center; }
  .responsibility-shade { background: linear-gradient(0deg, rgba(14,38,29,.94), rgba(14,38,29,.42)); }
  .responsibility-copy { width: auto; padding: 300px 20px 70px; }
  .responsibility h2 { font-size: clamp(38px, 11vw, 54px); }
  .responsibility-index { right: 14px; }
  .cooperation-body { grid-template-columns: 1fr; gap: 32px; margin: 48px 0 0; padding-top: 28px; }
  .contact { display: block; padding: 82px 20px; }
  .contact-form { grid-template-columns: 1fr; margin-top: 56px; }
  .contact-form .full { grid-column: auto; }
  .form-action { align-items: flex-start; flex-direction: column; }
  .site-footer { grid-template-columns: 1fr; padding: 30px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}