:root {
  --paper: #f4e9d5;
  --paper-light: #fbf6eb;
  --ink: #201914;
  --ink-soft: #5f5147;
  --gold: #c98942;
  --bean: #a83b32;
  --olive: #65704c;
  --line: rgba(32, 25, 20, .2);
  --content: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif; overflow-x: hidden; }
img { display: block; width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
.skip-link { position: fixed; left: 16px; top: -100px; z-index: 100; background: var(--ink); color: white; padding: 10px 16px; }
.skip-link:focus { top: 12px; }

.site-header { height: 82px; padding: 0 4vw; display: flex; align-items: center; justify-content: space-between; position: absolute; inset: 0 0 auto; z-index: 20; color: white; border-bottom: 1px solid rgba(255,255,255,.28); }
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark { width: 42px; height: 42px; fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.brand-copy { display: grid; gap: 2px; }
.brand-copy strong { font-family: "Songti SC", SimSun, serif; font-size: 17px; letter-spacing: .08em; }
.brand-copy small { font-size: 9px; letter-spacing: .2em; opacity: .72; }
.site-nav { display: flex; align-items: center; gap: clamp(20px, 3vw, 46px); font-size: 13px; letter-spacing: .08em; }
.site-nav a { position: relative; padding: 10px 0; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 3px; 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; color: inherit; background: transparent; border: 0; width: 44px; height: 44px; padding: 10px; cursor: pointer; }
.menu-toggle span { display: block; width: 24px; height: 1px; margin: 7px 0; background: currentColor; transition: transform .25s ease; }

.hero { min-height: 100svh; position: relative; display: grid; align-items: end; color: white; background: #5d371b; }
.hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(21,13,8,.7), rgba(21,13,8,.12) 58%, rgba(21,13,8,.28)), linear-gradient(0deg, rgba(21,13,8,.5), transparent 52%); }
.hero-content { position: relative; z-index: 2; width: min(92vw, var(--content)); margin: 0 auto; padding: 160px 0 11vh; }
.eyebrow, .section-kicker, .product-tag { margin: 0 0 24px; font-size: 11px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; }
.hero h1 { max-width: 900px; margin: 0; font: 500 clamp(50px, 7.5vw, 112px)/.98 "Songti SC", SimSun, serif; letter-spacing: -.055em; }
.hero h1 em { color: #f0d49d; font-style: italic; font-weight: 400; }
.hero-lead { max-width: 550px; margin: 32px 0 34px; font-size: clamp(15px, 1.5vw, 19px); line-height: 1.85; color: rgba(255,255,255,.84); }
.text-link { display: inline-flex; gap: 28px; align-items: center; padding: 12px 0 8px; border-bottom: 1px solid currentColor; font-size: 13px; letter-spacing: .08em; }
.text-link span { transition: transform .25s ease; }
.text-link:hover span { transform: translate(4px, 4px); }
.hero-index { position: absolute; right: 4vw; bottom: 4vh; z-index: 2; margin: 0; writing-mode: vertical-rl; font-size: 10px; letter-spacing: .22em; opacity: .65; }

.paper-section { background-color: var(--paper); background-image: radial-gradient(rgba(93,70,47,.07) .6px, transparent .6px); background-size: 5px 5px; }
.intro { padding: clamp(90px, 12vw, 180px) max(4vw, calc((100vw - var(--content))/2)); display: grid; grid-template-columns: 1fr 4fr 1.25fr; gap: 5vw; border-bottom: 1px solid var(--line); }
.section-kicker { color: var(--bean); }
.intro-copy h2, .section-heading h2, .process-head h2, .observation-copy h2, .contact-intro h2 { margin: 0; font: 500 clamp(38px, 5vw, 72px)/1.13 "Songti SC", SimSun, serif; letter-spacing: -.045em; }
.intro-copy > p { max-width: 760px; margin: 42px 0 0; color: var(--ink-soft); line-height: 1.95; font-size: 16px; }
.intro-note { align-self: end; display: grid; gap: 14px; padding-top: 18px; border-top: 1px solid var(--ink); font-size: 12px; color: var(--ink-soft); }

.products { padding: clamp(90px, 10vw, 160px) 0 0; }
.section-heading { width: min(92vw, var(--content)); margin: 0 auto clamp(80px, 10vw, 150px); display: grid; grid-template-columns: 1fr 4fr; gap: 5vw; }
.section-heading h2 { max-width: 860px; }
.product-story { width: min(92vw, var(--content)); margin: 0 auto clamp(100px, 12vw, 190px); display: grid; grid-template-columns: .65fr 1.25fr 3fr; gap: 3vw; align-items: center; }
.story-number { align-self: start; font: 400 clamp(62px, 9vw, 138px)/1 Georgia, serif; color: rgba(201,137,66,.55); }
.story-copy h3 { margin: 0 0 22px; font: 500 clamp(34px, 4vw, 58px)/1.15 "Songti SC", SimSun, serif; }
.story-copy > p:last-child { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.9; }
.product-tag { color: var(--olive); margin-bottom: 16px; }
.story-image { margin: 0; overflow: hidden; }
.story-image img { aspect-ratio: 4/3; object-fit: cover; transition: transform .7s cubic-bezier(.2,.6,.2,1); }
.story-image:hover img { transform: scale(1.025); }
.story-buckwheat { grid-template-columns: 3fr .65fr 1.25fr; }
.story-buckwheat .story-image { order: 1; }
.story-buckwheat .story-number { order: 2; text-align: right; }
.story-buckwheat .story-copy { order: 3; }
.story-redbean { margin-bottom: 0; padding-bottom: clamp(100px, 12vw, 190px); }

.process { padding: clamp(100px, 12vw, 180px) 0; color: #f7eddd; background: var(--ink); }
.process-head { width: min(92vw, var(--content)); margin: 0 auto 80px; display: grid; grid-template-columns: 1fr 3fr 1.4fr; gap: 5vw; align-items: end; }
.process-head .section-kicker { color: #dba762; align-self: start; }
.process-head > p:last-child { margin: 0; color: rgba(247,237,221,.62); font-size: 13px; line-height: 1.9; }
.process-sequence { width: min(96vw, 1500px); margin: 0 auto; }
.process-frame { margin: 0; display: grid; grid-template-columns: minmax(0, 3.2fr) minmax(260px, 1fr); border-top: 1px solid rgba(247,237,221,.18); }
.process-frame img { height: clamp(380px, 47vw, 680px); object-fit: cover; }
.process-frame > div { padding: clamp(32px, 5vw, 72px); display: flex; flex-direction: column; justify-content: flex-end; }
.process-frame span { color: #dba762; font: 400 56px/1 Georgia, serif; }
.process-frame h3 { margin: 28px 0 18px; font: 500 30px/1.2 "Songti SC", SimSun, serif; }
.process-frame p { margin: 0; color: rgba(247,237,221,.62); font-size: 13px; line-height: 1.85; }
.line-frame { grid-template-columns: minmax(260px, 1fr) minmax(0, 3.2fr); }
.line-frame img { order: 2; }
.line-frame > div { order: 1; }

.observation { padding: clamp(100px, 12vw, 180px) max(4vw, calc((100vw - var(--content))/2)); display: grid; grid-template-columns: 1.1fr 1.6fr; gap: 8vw; align-items: center; }
.observation-copy > p:not(.section-kicker) { max-width: 540px; margin: 30px 0 50px; color: var(--ink-soft); line-height: 1.9; }
.observation-copy ul { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.observation-copy li { padding: 18px 0; display: flex; gap: 28px; border-bottom: 1px solid var(--line); }
.observation-copy li span { color: var(--bean); font-size: 11px; letter-spacing: .1em; }
.observation-image { margin: 0; }
.observation-image img { aspect-ratio: 4/3; object-fit: cover; }

.development { padding: clamp(100px, 11vw, 170px) max(4vw, calc((100vw - var(--content))/2)); border-top: 1px solid var(--line); }
.section-heading.compact { width: auto; margin-bottom: 72px; }
.timeline { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.timeline li { display: grid; grid-template-columns: 1fr 4fr; gap: 5vw; padding: 42px 0; border-bottom: 1px solid var(--line); }
.timeline time { font: 400 clamp(34px, 4.5vw, 66px)/1 Georgia, serif; color: var(--bean); }
.timeline h3 { margin: 0 0 12px; font: 500 clamp(23px, 2.5vw, 34px)/1.25 "Songti SC", SimSun, serif; }
.timeline p { margin: 0; max-width: 680px; color: var(--ink-soft); line-height: 1.8; }

.contact { background: #ede0ca; }
.contact-image { margin: 0; }
.contact-image img { width: 100%; height: min(62vw, 760px); object-fit: cover; }
.contact-panel { width: min(92vw, var(--content)); margin: 0 auto; padding: clamp(90px, 10vw, 150px) 0; display: grid; grid-template-columns: 1fr 1.2fr; gap: 10vw; }
.contact-intro > p:not(.section-kicker) { margin: 30px 0; color: var(--ink-soft); line-height: 1.9; }
.contact-intro address { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--ink); font-style: normal; font-size: 13px; line-height: 1.8; }
#inquiry-form { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 24px; align-content: start; }
#inquiry-form label { display: grid; gap: 10px; color: var(--ink-soft); font-size: 12px; letter-spacing: .08em; }
#inquiry-form input, #inquiry-form select, #inquiry-form textarea { width: 100%; color: var(--ink); background: transparent; border: 0; border-bottom: 1px solid rgba(32,25,20,.45); border-radius: 0; padding: 11px 0; outline: none; }
#inquiry-form input:focus, #inquiry-form select:focus, #inquiry-form textarea:focus { border-color: var(--bean); box-shadow: 0 1px 0 var(--bean); }
#inquiry-form .full { grid-column: 1/-1; }
#inquiry-form textarea { resize: vertical; min-height: 110px; }
#inquiry-form button { grid-column: 1/-1; justify-self: start; min-width: 190px; display: flex; align-items: center; justify-content: space-between; gap: 40px; padding: 15px 18px; color: #fff; background: var(--bean); border: 0; cursor: pointer; transition: background .25s ease; }
#inquiry-form button:hover { background: #862f28; }
.form-status { grid-column: 1/-1; min-height: 24px; margin: 0; color: var(--bean); font-size: 13px; line-height: 1.7; }

.site-footer { padding: 52px 4vw 28px; color: #f7eddd; background: var(--ink); }
.footer-brand { display: flex; align-items: center; gap: 18px; }
.footer-brand > div { display: grid; gap: 5px; }
.footer-brand strong { font: 500 18px/1.2 "Songti SC", SimSun, serif; letter-spacing: .05em; }
.footer-brand span { color: rgba(247,237,221,.5); font-size: 9px; letter-spacing: .16em; }
.site-footer > nav { margin: 46px 0; padding: 28px 0; display: flex; gap: 4vw; border-top: 1px solid rgba(247,237,221,.16); border-bottom: 1px solid rgba(247,237,221,.16); font-size: 12px; }
.footer-meta { display: flex; justify-content: space-between; gap: 24px; color: rgba(247,237,221,.5); font-size: 10px; letter-spacing: .05em; }

@media (max-width: 900px) {
  .site-header { height: 72px; }
  .menu-toggle { display: block; position: relative; z-index: 2; }
  .site-nav { position: fixed; inset: 0; padding: 110px 8vw 50px; background: rgba(32,25,20,.98); flex-direction: column; align-items: flex-start; gap: 18px; transform: translateY(-100%); visibility: hidden; transition: transform .3s ease, visibility .3s; }
  .site-nav.is-open { transform: translateY(0); visibility: visible; }
  .site-nav a { width: 100%; padding: 17px 0; border-bottom: 1px solid rgba(255,255,255,.18); font: 500 28px/1.2 "Songti SC", SimSun, serif; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  body.menu-open { overflow: hidden; }
  .intro { grid-template-columns: 1fr 4fr; }
  .intro-note { grid-column: 2; }
  .section-heading, .process-head { grid-template-columns: 1fr 4fr; }
  .process-head > p:last-child { grid-column: 2; }
  .product-story, .story-buckwheat { grid-template-columns: .5fr 2fr; gap: 28px; }
  .product-story .story-image { grid-column: 1/-1; order: 3; }
  .story-buckwheat .story-number { order: 1; text-align: left; }
  .story-buckwheat .story-copy { order: 2; }
  .process-frame, .line-frame { grid-template-columns: 1fr; }
  .process-frame img, .line-frame img { order: 1; height: 55vw; }
  .process-frame > div, .line-frame > div { order: 2; }
  .observation { grid-template-columns: 1fr; }
  .contact-panel { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .brand-copy strong { font-size: 14px; }
  .brand-copy small { display: none; }
  .hero { min-height: 760px; }
  .hero > img { object-position: 63% center; }
  .hero-content { padding-bottom: 70px; }
  .hero h1 { font-size: clamp(46px, 14vw, 66px); }
  .hero-lead { max-width: 92%; font-size: 14px; }
  .hero-index { display: none; }
  .intro { padding-left: 5vw; padding-right: 5vw; grid-template-columns: 1fr; }
  .intro-copy, .intro-note { grid-column: auto; }
  .intro-copy h2, .section-heading h2, .process-head h2, .observation-copy h2, .contact-intro h2 { font-size: clamp(35px, 11vw, 48px); }
  .section-heading, .process-head { width: 90vw; grid-template-columns: 1fr; }
  .process-head > p:last-child { grid-column: auto; }
  .product-story, .story-buckwheat { width: 90vw; grid-template-columns: 1fr; }
  .story-number, .story-buckwheat .story-number { order: 1; font-size: 74px; }
  .story-copy, .story-buckwheat .story-copy { order: 2; }
  .product-story .story-image, .story-buckwheat .story-image { grid-column: auto; order: 3; }
  .story-image img { aspect-ratio: 1/1; }
  .process { padding-top: 90px; }
  .process-frame img, .line-frame img { height: 66vw; }
  .process-frame > div { padding: 30px 5vw 52px; }
  .observation, .development { padding-left: 5vw; padding-right: 5vw; }
  .timeline li { grid-template-columns: 1fr; gap: 22px; }
  .contact-image img { height: 78vw; }
  .contact-panel { width: 90vw; }
  #inquiry-form { grid-template-columns: 1fr; }
  #inquiry-form .full, #inquiry-form button, .form-status { grid-column: auto; }
  .site-footer > nav { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
  .footer-meta { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}