/* ============================================
   嘟可亲 DUKQIN · Japanese-style Brand Site
   Light, warm, gentle — 余白とやさしさ
   ============================================ */

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Palette — rice paper, sumi ink, sage */
  --paper: #f7f4ee;
  --paper-soft: #efeae0;
  --paper-warm: #f1ece2;
  --ink: #2d2926;
  --ink-soft: #5a534c;
  --ink-mute: #8a8278;
  --sage: #7a8a6e;
  --sage-deep: #5f6e54;
  --sage-soft: #a8b49a;
  --peach: #d9b8a6;
  --peach-soft: #ecd9cb;
  --line: rgba(45, 41, 38, 0.1);
  --line-soft: rgba(45, 41, 38, 0.06);
  --line-strong: rgba(45, 41, 38, 0.18);

  /* Type */
  --serif: "Noto Serif JP", "Shippori Mincho", "Hiragino Mincho ProN", serif;
  --sans: "Zen Kaku Gothic New", "Noto Sans JP", "Hiragino Sans", sans-serif;
  --mincho: "Shippori Mincho", "Noto Serif JP", serif;

  /* Layout */
  --container: 1240px;
  --gutter: 36px;
  --radius: 4px;
  --radius-lg: 10px;
  --ease: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-long: cubic-bezier(0.16, 1, 0.3, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-weight: 400;
  line-height: 1.8;
  font-size: 15px;
  overflow-x: hidden;
  letter-spacing: 0.02em;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s var(--ease);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

::selection {
  background: var(--sage-soft);
  color: var(--ink);
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- Typography ---------- */
.eyebrow {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.28em;
  color: var(--sage-deep);
  margin-bottom: 24px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--sage);
}

.section-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  line-height: 1.4;
  letter-spacing: 0.02em;
  margin-bottom: 28px;
  color: var(--ink);
}

.section-title em {
  font-style: normal;
  color: var(--sage-deep);
  font-weight: 500;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  padding: 16px 36px;
  border-radius: 100px;
  transition: all 0.4s var(--ease);
  cursor: pointer;
}

.btn--primary {
  background: var(--sage);
  color: var(--paper);
}

.btn--primary:hover {
  background: var(--sage-deep);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px -8px rgba(122, 138, 110, 0.5);
}

.btn--ghost {
  border: 1px solid var(--line-strong);
  color: var(--ink);
  background: transparent;
}

.btn--ghost:hover {
  border-color: var(--sage);
  color: var(--sage-deep);
  transform: translateY(-2px);
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  transition: all 0.5s var(--ease);
  background: transparent;
}

.nav.scrolled {
  background: rgba(247, 244, 238, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line-soft);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.4);
}

.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 22px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.nav__logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav__logo-cn {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.04em;
}

.nav__logo-en {
  font-size: 10px;
  letter-spacing: 0.32em;
  color: var(--sage-deep);
  margin-top: 2px;
}

.nav__menu {
  display: flex;
  gap: 38px;
}

.nav__link {
  font-size: 13px;
  font-weight: 400;
  color: var(--ink-soft);
  position: relative;
  padding: 4px 0;
  letter-spacing: 0.04em;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--sage);
  transition: all 0.4s var(--ease);
  transform: translateX(-50%);
}

.nav__link:hover {
  color: var(--sage-deep);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav__cta {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  padding: 10px 22px;
  border-radius: 100px;
  transition: all 0.3s var(--ease);
}

.nav__cta:hover {
  background: var(--sage);
  border-color: var(--sage);
  color: var(--paper);
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  height: 30px;
  justify-content: center;
  align-items: center;
}

.nav__burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: all 0.3s var(--ease);
}

.nav__burger.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__burger.open span:nth-child(2) {
  opacity: 0;
}

.nav__burger.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.nav__mobile {
  display: none;
  flex-direction: column;
  background: var(--paper);
  border-top: 0;
  padding: 0 var(--gutter);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s var(--ease), padding 0.5s var(--ease), border-top 0.3s var(--ease);
}

.nav__mobile.open {
  max-height: 440px;
  padding: 12px var(--gutter) 28px;
  border-top: 1px solid var(--line);
}

.nav__mobile-link {
  font-size: 14px;
  color: var(--ink-soft);
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
  letter-spacing: 0.06em;
}

.nav__mobile-link:hover {
  color: var(--sage-deep);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 75% 30%, rgba(122, 138, 110, 0.1), transparent 55%),
    radial-gradient(circle at 15% 75%, rgba(217, 184, 166, 0.12), transparent 50%),
    linear-gradient(180deg, #f7f4ee 0%, #f1ece2 100%);
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: var(--container);
  margin: 0 auto;
  padding: 120px var(--gutter) 80px;
  width: 100%;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero__kanji {
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: 0.2em;
  color: var(--sage-deep);
  margin-bottom: 28px;
  opacity: 0;
  animation: fadeIn 1.2s var(--ease) 0.3s forwards;
}

.hero__title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2.6rem, 6vw, 4.8rem);
  line-height: 1.3;
  letter-spacing: 0.02em;
  margin-bottom: 36px;
  color: var(--ink);
}

.hero__title-line {
  display: block;
  overflow: hidden;
  opacity: 0;
  animation: fadeUp 1.2s var(--ease-long) forwards;
}

.hero__title-line:nth-child(1) {
  animation-delay: 0.45s;
}

.hero__title-line:nth-child(2) {
  animation-delay: 0.65s;
}

.hero__title em {
  font-style: normal;
  color: var(--sage-deep);
  font-weight: 500;
}

.hero__sub {
  max-width: 460px;
  font-size: 15px;
  line-height: 2;
  color: var(--ink-soft);
  margin-bottom: 44px;
  opacity: 0;
  animation: fadeIn 1s var(--ease) 0.9s forwards;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeIn 1s var(--ease) 1.1s forwards;
}

/* Hero visual — circle (enso) + seal */
.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  animation: fadeIn 1.4s var(--ease-long) 0.6s forwards;
}

.hero__circle {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  border: 2px solid var(--sage);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background:
    radial-gradient(circle at 40% 35%, rgba(255, 255, 255, 0.6), transparent 60%),
    rgba(122, 138, 110, 0.06);
  transition: transform 1s var(--ease);
}

.hero__circle::before {
  content: "";
  position: absolute;
  inset: -12px;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.hero__circle-kanji {
  font-family: var(--mincho);
  font-size: 120px;
  font-weight: 400;
  color: var(--sage-deep);
  line-height: 1;
}

.hero__stamp {
  position: absolute;
  bottom: 10px;
  right: -10px;
  width: 72px;
  height: 72px;
  border-radius: 6px;
  background: var(--peach);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  transform: rotate(-6deg);
  box-shadow: 0 6px 18px -4px rgba(217, 184, 166, 0.6);
}

.hero__stamp span {
  font-family: var(--mincho);
  font-size: 14px;
  color: var(--paper);
  letter-spacing: 0.04em;
  line-height: 1.1;
  text-align: center;
}

.hero__stamp-sub {
  font-size: 8px !important;
  letter-spacing: 0.12em !important;
  opacity: 0.85;
}

.hero__scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--ink-mute);
}

.hero__scroll-line {
  width: 1px;
  height: 44px;
  background: var(--line-strong);
  position: relative;
  overflow: hidden;
}

.hero__scroll-line::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background: var(--sage);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(200%); }
}

.hero__vertical {
  position: absolute;
  right: 40px;
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.4em;
  color: var(--ink-mute);
  z-index: 2;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Trust ---------- */
.trust {
  background: var(--paper-warm);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  padding: 40px 0;
}

.trust__row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.trust__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
}

.trust__mark {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
  color: var(--sage-deep);
  letter-spacing: 0.08em;
}

.trust__text {
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.06em;
}

/* ---------- Concept ---------- */
.concept {
  padding: 130px 0;
  background: var(--paper);
}

.concept__grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 80px;
  align-items: center;
}

.concept__visual {
  position: relative;
}

.concept__frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  aspect-ratio: 4 / 5;
  box-shadow: 0 30px 60px -24px rgba(45, 41, 38, 0.18);
}

.concept__frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.4s var(--ease);
}

.concept__visual:hover .concept__frame img {
  transform: scale(1.05);
}

.concept__seal {
  position: absolute;
  bottom: -20px;
  left: -20px;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: var(--sage);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 24px -6px rgba(122, 138, 110, 0.5);
}

.concept__seal span {
  font-family: var(--mincho);
  font-size: 34px;
  color: var(--paper);
}

.concept__lead {
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.9;
  color: var(--ink);
  margin-bottom: 24px;
  font-weight: 400;
}

.concept__body {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 2;
  margin-bottom: 44px;
}

.concept__values {
  display: flex;
  gap: 40px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.concept__value {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.concept__value-num {
  font-family: var(--mincho);
  font-size: 28px;
  color: var(--sage-deep);
  font-weight: 400;
}

.concept__value-text {
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
}

/* ---------- Products ---------- */
.products {
  padding: 130px 0;
  background: var(--paper-soft);
}

.products__head {
  max-width: 640px;
  margin-bottom: 72px;
}

.products__intro {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.9;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
}

.product {
  background: var(--paper);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.5s var(--ease);
  box-shadow: 0 4px 20px -8px rgba(45, 41, 38, 0.08);
}

.product:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 44px -16px rgba(45, 41, 38, 0.18);
}

.product__media {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--paper-warm);
}

.product__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.1s var(--ease);
}

.product:hover .product__media img {
  transform: scale(1.06);
}

.product__badge {
  position: absolute;
  top: 16px;
  left: 16px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--paper);
  background: var(--sage);
  padding: 6px 14px;
  border-radius: 100px;
  font-weight: 500;
}

.product__body {
  padding: 28px 26px 30px;
}

.product__cat {
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--ink-mute);
  margin-bottom: 10px;
}

.product__name {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
}

.product__jp {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.product__foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.product__price {
  font-family: var(--serif);
  font-size: 17px;
  color: var(--sage-deep);
  font-weight: 500;
}

.product__link {
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.1em;
  transition: color 0.3s var(--ease);
}

.product__link:hover {
  color: var(--sage-deep);
}

/* ---------- Safety ---------- */
.safety {
  padding: 130px 0;
  background: var(--paper);
}

.safety__head {
  max-width: 680px;
  margin-bottom: 72px;
}

.safety__intro {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.9;
}

.safety__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.safety__item {
  background: var(--paper);
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: background 0.4s var(--ease);
}

.safety__item:hover {
  background: var(--paper-warm);
}

.safety__icon {
  font-size: 28px;
  color: var(--sage);
  line-height: 1;
  margin-bottom: 8px;
}

.safety__title {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
  color: var(--ink);
}

.safety__text {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* ---------- Material ---------- */
.material {
  background: var(--paper-soft);
}

.material__feature {
  position: relative;
  min-height: 64vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.material__feature-bg {
  position: absolute;
  inset: 0;
  background:
    url("https://dukqin.oss-cn-hongkong.aliyuncs.com/material-bg.jpg")
      center / cover no-repeat fixed;
  opacity: 0.18;
}

.material__feature-content {
  position: relative;
  z-index: 2;
  max-width: var(--container);
  margin: 0 auto;
  padding: 110px var(--gutter);
  width: 100%;
}

.material__text {
  max-width: 540px;
  font-size: 16px;
  line-height: 2;
  color: var(--ink-soft);
}

.material__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  padding: 90px 0;
}

.material__item {
  padding: 8px 4px;
}

.material__num {
  display: block;
  font-family: var(--mincho);
  font-size: 34px;
  color: var(--sage);
  font-weight: 400;
  margin-bottom: 22px;
}

.material__name {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 4px;
}

.material__origin {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sage-deep);
  margin-bottom: 16px;
}

.material__desc {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.8;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

/* ---------- Voices ---------- */
.voices {
  padding: 130px 0;
  background: var(--paper);
}

.voices__head {
  margin-bottom: 72px;
}

.voices__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.voice {
  background: var(--paper-warm);
  border-radius: var(--radius-lg);
  padding: 44px 36px;
  position: relative;
  transition: all 0.4s var(--ease);
}

.voice:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px -12px rgba(45, 41, 38, 0.12);
}

.voice__mark {
  font-family: var(--mincho);
  font-size: 48px;
  color: var(--sage-soft);
  line-height: 0.6;
  margin-bottom: 16px;
}

.voice__text {
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink);
  margin-bottom: 28px;
}

.voice__author {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.voice__name {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
}

.voice__meta {
  font-size: 12px;
  color: var(--ink-mute);
}

/* ---------- Contact ---------- */
.contact {
  padding: 130px 0;
  background:
    radial-gradient(circle at 50% 30%, rgba(122, 138, 110, 0.08), transparent 60%),
    var(--paper-soft);
  text-align: center;
}

.contact__inner {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

.contact__seal {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--sage);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 28px;
  box-shadow: 0 8px 20px -6px rgba(122, 138, 110, 0.5);
}

.contact__seal span {
  font-family: var(--mincho);
  font-size: 28px;
  color: var(--paper);
}

.contact__text {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.9;
  margin-bottom: 36px;
}

.contact__email-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.contact__email-label {
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--sage-deep);
  font-weight: 500;
}

.contact__email {
  font-family: var(--mincho);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--ink);
  padding: 12px 32px;
  border: 1px solid var(--line-strong);
  border-radius: 100px;
  transition: all 0.3s var(--ease);
}

.contact__email:hover {
  border-color: var(--sage);
  color: var(--sage-deep);
  transform: translateY(-2px);
}

/* ---------- Footer ---------- */
.footer {
  background: var(--ink);
  color: var(--paper);
  padding: 80px 0 32px;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.3fr 2fr;
  gap: 64px;
  margin-bottom: 60px;
}

.footer__logo {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
  color: var(--paper);
  letter-spacing: 0.04em;
  display: block;
}

.footer__logo-en {
  display: block;
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--sage-soft);
  margin-top: 4px;
  margin-bottom: 18px;
}

.footer__tag {
  font-size: 13px;
  color: rgba(247, 244, 238, 0.6);
  line-height: 1.8;
  max-width: 280px;
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.footer__col-title {
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--sage-soft);
  font-weight: 500;
  margin-bottom: 20px;
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer__col a {
  font-size: 13px;
  color: rgba(247, 244, 238, 0.7);
}

.footer__col a:hover {
  color: var(--paper);
}

.footer__bottom {
  display: flex;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid rgba(247, 244, 238, 0.1);
  flex-wrap: wrap;
  gap: 16px;
}

.footer__bottom p {
  font-size: 12px;
  color: rgba(247, 244, 238, 0.5);
}

/* ---------- Reveal Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1s var(--ease-long), transform 1s var(--ease-long);
  will-change: opacity, transform;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero__content {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }
  .hero__kanji,
  .hero__sub {
    max-width: none;
    margin-left: auto;
    margin-right: auto;
  }
  .hero__actions {
    justify-content: center;
  }
  .hero__vertical {
    display: none;
  }
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .safety__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .material__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .voices__grid {
    grid-template-columns: 1fr;
  }
  .concept__grid {
    grid-template-columns: 1fr;
    gap: 56px;
  }
  .trust__row {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
}

@media (max-width: 860px) {
  :root {
    --gutter: 24px;
  }
  .nav__menu {
    display: none;
  }
  .nav__burger {
    display: flex;
  }
  .nav__mobile {
    display: flex;
  }
  .nav__actions .nav__cta {
    display: none;
  }
  .footer__top {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .material__feature-bg {
    background-attachment: scroll;
  }
  .hero__circle {
    width: 260px;
    height: 260px;
  }
  .hero__circle-kanji {
    font-size: 96px;
  }
}

@media (max-width: 600px) {
  .product-grid,
  .safety__grid {
    grid-template-columns: 1fr;
  }
  .trust__row {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .footer__cols {
    grid-template-columns: 1fr 1fr;
  }
  .concept__values {
    gap: 24px;
    flex-wrap: wrap;
  }
  .hero,
  .concept,
  .products,
  .safety,
  .voices,
  .contact {
    padding-top: 90px;
    padding-bottom: 90px;
  }
  .hero .hero__content {
    padding-top: 110px;
  }
  .material__grid {
    padding: 60px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}