/* ========== RESET & ROOT ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* ── 深海ブルー系（ヒーローと統一） ── */
  --deep-green:  #0a3d5c;   /* 旧deep-green → 深海ネイビー */
  --mid-green:   #0d5a7a;   /* 旧mid-green  → ミッドブルー */
  --pale-green:  #d4ecf7;   /* 旧pale-green → 浅海ブルー   */
  --cream:       #eef6fb;   /* 旧cream      → 水面ホワイト  */
  --gold:        #C9A96E;   /* アクセントゴールド（維持）   */
  --gold-light:  #E8D5B0;   /* ゴールドライト（維持）       */
  --text-dark:   #041f30;   /* 旧text-dark  → 深海ダーク    */
  --text-mid:    #2a5a78;   /* 旧text-mid   → ミッドネイビー */
  --text-light:  #6a9eb8;   /* 旧text-light → ライトブルー  */
  --white:       #FFFFFF;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--white);
  color: var(--text-dark);
  overflow-x: hidden;
}

/* ========== NAV ========== */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.2rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.4s, box-shadow 0.4s;
}

nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 1px 0 rgba(44, 74, 62, 0.1);
}

.nav-logo {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.9rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  color: var(--white);
  text-decoration: none;
  transition: color 0.4s;
}

nav.scrolled .nav-logo {
  color: var(--deep-green);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: color 0.3s;
}

nav.scrolled .nav-links a {
  color: var(--text-mid);
}

.nav-links a:hover {
  color: var(--gold);
}

.nav-hamburger {
  display: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
}

.nav-hamburger span {
  width: 24px;
  height: 1.5px;
  background: white;
  display: block;
  transition: background 0.4s, transform 0.3s, opacity 0.3s;
}

nav.scrolled .nav-hamburger span {
  background: #0a3d5c;
}

/* Mobile nav open state */
.nav-hamburger.is-open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger.is-open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.nav-mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: #041f30;
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
}

.nav-mobile-menu.is-open {
  display: flex;
}

.nav-mobile-menu a {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: color 0.3s;
}

.nav-mobile-menu a:hover {
  color: var(--gold);
}

/* ========== HERO ========== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-ocean {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-ocean-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, #041f30 0%, #0a3d5c 40%, #0d5a7a 100%);
}

.ripple-container {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.ripple {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(201, 169, 110, 0.25);
  animation: rippleOut 4s ease-out infinite;
}

.ripple:nth-child(1) { width: 200px;  height: 200px;  animation-delay: 0s; }
.ripple:nth-child(2) { width: 400px;  height: 400px;  animation-delay: 0.8s; }
.ripple:nth-child(3) { width: 600px;  height: 600px;  animation-delay: 1.6s; }
.ripple:nth-child(4) { width: 800px;  height: 800px;  animation-delay: 2.4s; }
.ripple:nth-child(5) { width: 1000px; height: 1000px; animation-delay: 3.2s; }

@keyframes rippleOut {
  0%   { opacity: 0.6; transform: scale(0.4); }
  100% { opacity: 0;   transform: scale(1); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(4, 20, 35, 0.35);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 2rem;
}

.hero-eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.4em;
  color: var(--gold);
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 1s 0.3s forwards;
}

.hero-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 300;
  color: var(--white);
  line-height: 1;
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeUp 1s 0.6s forwards;
}

.hero-subtitle {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  font-weight: 300;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.2em;
  margin-bottom: 3rem;
  opacity: 0;
  animation: fadeUp 1s 0.9s forwards;
}

.hero-cta {
  display: inline-block;
  padding: 0.85rem 2.8rem;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-decoration: none;
  transition: background 0.3s, color 0.3s;
  opacity: 0;
  animation: fadeUp 1s 1.2s forwards;
}

.hero-cta:hover {
  background: var(--gold);
  color: var(--deep-green);
}

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  animation: fadeIn 1s 2s forwards;
}

.hero-scroll span {
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: rgba(255, 255, 255, 0.5);
}

.scroll-line {
  width: 1px;
  height: 50px;
  background: rgba(255, 255, 255, 0.3);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gold);
  animation: scrollDrop 1.5s ease-in-out infinite;
}

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

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

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

/* ========== COMMON SECTION ========== */
section {
  padding: 6rem 2rem;
}

.section-eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.4em;
  color: var(--gold);
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.section-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 300;
  color: var(--deep-green);
  line-height: 1.2;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
}

.section-body {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.95rem;
  line-height: 2;
  color: var(--text-mid);
  font-weight: 300;
}

/* ========== SCROLL REVEAL ========== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.reveal-delay-1 { transition-delay: 0.15s; }
.reveal-delay-2 { transition-delay: 0.30s; }
.reveal-delay-3 { transition-delay: 0.45s; }

/* ========== CONCEPT ========== */
.concept {
  background: var(--cream);
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 600px;
}

.concept-visual {
  background: #0a3d5c;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5rem 4rem;
  position: relative;
  overflow: hidden;
}

.concept-visual::before {
  content: 'MUSE';
  position: absolute;
  font-family: 'Cormorant Garamond', serif;
  font-size: 14rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.04);
  letter-spacing: 0.2em;
  white-space: nowrap;
}

.concept-icon {
  width: 180px;
  height: 180px;
  border: 1px solid rgba(201, 169, 110, 0.4);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.concept-icon::before {
  content: '';
  position: absolute;
  width: 220px;
  height: 220px;
  border: 1px solid rgba(201, 169, 110, 0.15);
  border-radius: 50%;
}

.concept-icon svg {
  width: 80px;
  height: 80px;
}

.concept-text {
  padding: 5rem 4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.concept-tagline {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.3rem;
  font-style: italic;
  color: var(--gold);
  margin-bottom: 2rem;
  font-weight: 300;
  letter-spacing: 0.05em;
}

/* ========== PRODUCTS ========== */
.products {
  background: var(--white);
  text-align: center;
}

.products-header {
  max-width: 600px;
  margin: 0 auto 4rem;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.product-card {
  background: var(--cream);
  padding: 3rem 2rem 2.5rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.4s;
}

.product-card:hover {
  transform: translateY(-6px);
}

.product-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gold);
  transform: scaleX(0);
  transition: transform 0.4s;
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: #d4ecf7;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.product-icon svg {
  width: 36px;
  height: 36px;
  stroke: var(--deep-green);
}

.product-card h3 {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--deep-green);
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.product-card p {
  font-size: 0.85rem;
  color: var(--text-mid);
  line-height: 1.9;
  font-weight: 300;
}

.product-link {
  display: inline-block;
  margin-top: 1.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

.product-link:hover {
  border-color: var(--gold);
}

/* ========== BANNER ========== */
.banner {
  background: #0a3d5c;
  padding: 5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(201, 169, 110, 0.1) 0%, transparent 70%);
}

.banner-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 300;
  color: var(--white);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  position: relative;
}

.banner-sub {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.9rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.2em;
  margin-bottom: 2.5rem;
  position: relative;
}

.banner-cta {
  display: inline-block;
  padding: 0.9rem 3rem;
  background: var(--gold);
  color: var(--deep-green);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.3s;
  position: relative;
}

.banner-cta:hover {
  opacity: 0.85;
}

/* ========== SUSTAINABILITY ========== */
.sustain-wrapper {
  background: #d4ecf7;
}

.sustain {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 6rem 3rem;
  align-items: center;
}

.sustain-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 2.5rem;
}

.stat-box {
  background: var(--white);
  padding: 1.5rem;
  border-left: 3px solid var(--gold);
}

.stat-number {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2.8rem;
  font-weight: 300;
  color: var(--deep-green);
  line-height: 1;
  margin-bottom: 0.3rem;
}

.stat-number small {
  font-size: 1.2rem;
}

.stat-label {
  font-size: 0.72rem;
  color: var(--text-light);
  letter-spacing: 0.15em;
}

.sustain-visual {
  position: relative;
  height: 400px;
  background: #0d4f6e;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.sustain-visual svg.bg-circles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.2;
}

.sustain-badge {
  position: relative;
  z-index: 2;
  text-align: center;
  color: white;
  padding: 2rem;
}

.sustain-badge-icon {
  width: 90px;
  height: 90px;
  border: 1px solid rgba(201, 169, 110, 0.5);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.2rem;
}

.sustain-badge p {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.2rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.7;
}

/* ========== NEWS ========== */
.news {
  background: var(--white);
}

.news-inner {
  max-width: 900px;
  margin: 0 auto;
}

.news-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 3rem;
}

.news-all {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 2px;
}

.news-list {
  list-style: none;
}

.news-item {
  display: grid;
  grid-template-columns: 120px 80px 1fr;
  gap: 1.5rem;
  align-items: start;
  padding: 1.5rem 0;
  border-top: 1px solid rgba(44, 74, 62, 0.1);
  text-decoration: none;
  transition: background 0.2s;
}

.news-item:last-child {
  border-bottom: 1px solid rgba(44, 74, 62, 0.1);
}

.news-date {
  font-size: 0.78rem;
  color: var(--text-light);
  letter-spacing: 0.1em;
  padding-top: 2px;
}

.news-tag {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  padding: 3px 10px;
  background: #d4ecf7;
  color: var(--deep-green);
  display: inline-block;
  white-space: nowrap;
}

.news-title-text {
  font-size: 0.88rem;
  color: var(--text-dark);
  line-height: 1.7;
  font-weight: 300;
}

/* ========== FOOTER ========== */
footer {
  background: var(--text-dark);
  color: rgba(255, 255, 255, 0.5);
  padding: 4rem 3rem 2rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  color: white;
  margin-bottom: 1rem;
  display: block;
}

.footer-desc {
  font-size: 0.78rem;
  line-height: 1.9;
}

.footer-col h4 {
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: var(--gold);
  margin-bottom: 1.2rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.6rem;
}

.footer-col a {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: white;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  font-size: 0.72rem;
}

.social-links {
  display: flex;
  gap: 1.5rem;
}

.social-links a {
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  transition: color 0.2s;
}

.social-links a:hover {
  color: var(--gold);
}

/* ========== DEEP SEA WATER ========== */
.dsw {
  background: var(--cream);
  padding: 0;
}

/* イントロ：左テキスト＋右断面図 */
.dsw-intro {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 0;
  max-width: 100%;
  min-height: 420px;
}

.dsw-intro-text {
  padding: 6rem 4rem 5rem;
  background: var(--cream);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.dsw-intro-visual {
  background: #0a3d5c;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 2.5rem;
  overflow: hidden;
}

.dsw-intro-visual svg {
  width: 100%;
  height: auto;
  max-height: 340px;
}

/* 5大特性カードグリッド */
.dsw-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  background: #0a3d5c;
}

/* 1行目3枚、2行目2枚を中央寄せ */
.dsw-cards .dsw-card:nth-child(4),
.dsw-cards .dsw-card:nth-child(5) {
  /* 2行目は3列グリッドの1・2列目 → JS不要でCSSで配置 */
}

.dsw-card {
  background: var(--cream);
  padding: 2.5rem 2.5rem 2rem;
  border-right: 1px solid rgba(44, 74, 62, 0.12);
  border-bottom: 1px solid rgba(44, 74, 62, 0.12);
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: background 0.35s;
}

.dsw-card:hover {
  background: var(--white);
}

/* 2行目の2枚：右端の空きセルを深緑で埋める */
.dsw-cards::after {
  content: '';
  background: #0a3d5c;
  border-bottom: 1px solid rgba(44, 74, 62, 0.12);
}

.dsw-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.2rem;
}

.dsw-num {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2.2rem;
  font-weight: 300;
  color: var(--gold-light);
  line-height: 1;
  letter-spacing: 0.05em;
}

.dsw-card-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.dsw-card-icon svg {
  width: 100%;
  height: 100%;
}

.dsw-card-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--deep-green);
  letter-spacing: 0.05em;
  margin-bottom: 0.8rem;
}

.dsw-card-body {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.83rem;
  line-height: 2;
  color: var(--text-mid);
  font-weight: 300;
  flex: 1;
  margin-bottom: 1.5rem;
}

.dsw-card-body strong {
  color: var(--deep-green);
  font-weight: 500;
}

.dsw-card-data {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(44, 74, 62, 0.12);
  margin-top: auto;
}

.dsw-data-val {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--deep-green);
  line-height: 1;
}

.dsw-data-val small {
  font-size: 1rem;
}

.dsw-data-lbl {
  font-size: 0.65rem;
  color: var(--text-light);
  letter-spacing: 0.15em;
  line-height: 1.4;
}

/* ========== ABOUT ========== */
.about {
  background: var(--white);
  padding: 7rem 2rem;
}

.about-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.about-lead {
  text-align: center;
  margin-bottom: 5rem;
}

.about-lead .section-title {
  font-size: clamp(2rem, 4vw, 3rem);
}

.about-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
  margin-bottom: 5rem;
}

.about-text .section-body strong {
  color: var(--deep-green);
  font-weight: 500;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 1px solid rgba(44, 74, 62, 0.15);
}

.about-feature {
  padding: 1.8rem 0 1.8rem 2.5rem;
  border-bottom: 1px solid rgba(44, 74, 62, 0.1);
  position: relative;
}

.about-feature:last-child {
  border-bottom: none;
}

.about-feature::before {
  content: '';
  position: absolute;
  left: -1px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gold);
  transform: scaleY(0);
  transition: transform 0.5s ease;
  transform-origin: top;
}

.about-feature:hover::before {
  transform: scaleY(1);
}

.about-feature-num {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2.4rem;
  font-weight: 300;
  color: var(--deep-green);
  line-height: 1;
  margin-bottom: 0.3rem;
}

.about-feature-num span {
  font-size: 1.2rem;
}

.about-feature-label {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.about-feature-desc {
  font-size: 0.82rem;
  color: var(--text-mid);
  line-height: 1.8;
  font-weight: 300;
}

/* OEM帯 */
.about-oem { 
  background: #0a3d5c;
  padding: 3.5rem 4rem;
  display: flex;
  align-items: center;
  gap: 3rem;
}

.about-oem-icon {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
}

.about-oem-icon svg {
  width: 100%;
  height: 100%;
}

.about-oem-text {
  flex: 1;
}

.about-oem-label {
  font-size: 0.68rem;
  letter-spacing: 0.4em;
  color: var(--gold);
  margin-bottom: 0.8rem;
}

.about-oem-body {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.92rem;
  line-height: 2;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 300;
  margin-bottom: 1.5rem;
}

.about-oem-cta {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 3px;
  transition: opacity 0.3s;
}

.about-oem-cta:hover {
  opacity: 0.7;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 900px) {
  .product-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .dsw-intro {
    grid-template-columns: 1fr;
  }
  .dsw-intro-visual {
    min-height: 260px;
  }
  .dsw-cards {
    grid-template-columns: 1fr 1fr;
  }
  .dsw-cards::after {
    display: none;
  }
}

@media (max-width: 768px) {
  nav {
    padding: 1rem 1.5rem;
  }
  .nav-links {
    display: none;
  }
  .nav-hamburger {
    display: flex;
  }
  .dsw-cards {
    grid-template-columns: 1fr;
  }
  .dsw-intro-text {
    padding: 3.5rem 1.5rem 3rem;
  }
  .concept {
    grid-template-columns: 1fr;
  }
  .concept-visual {
    min-height: 250px;
    padding: 3rem 2rem;
  }
  .concept-text {
    padding: 3rem 2rem;
  }
  .about-body {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .about-oem { 
    flex-direction: column;
    padding: 2.5rem 2rem;
    text-align: center;
    gap: 1.5rem;
  }
  .product-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
  }
  .sustain {
    grid-template-columns: 1fr;
    padding: 4rem 1.5rem;
    gap: 2.5rem;
  }
  .sustain-visual {
    height: 260px;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  .news-item {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }
}

@media (max-width: 480px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
  .sustain-stats {
    grid-template-columns: 1fr;
  }
}

/* ========== REDUCED MOTION ========== */
@media (prefers-reduced-motion: reduce) {
  .ripple,
  .scroll-line::after,
  .hero-ocean-svg animate,
  .hero-ocean-svg animateTransform {
    animation: none;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ========== PAGE HERO (サブページ共通) ========== */
.page-hero {
  background: linear-gradient(160deg, #041f30 0%, #0a3d5c 40%, #0d5a7a 100%);
  padding: 9rem 2rem 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'%3E%3Ccircle cx='30' cy='30' r='1' fill='%23C9A96E' opacity='0.07'/%3E%3C/svg%3E") repeat;
  pointer-events: none;
}
.page-hero-eyebrow { font-size: 0.68rem; letter-spacing: 0.45em; color: var(--gold); margin-bottom: 1rem; position: relative; }
.page-hero-title { font-family: 'Cormorant Garamond', serif; font-size: clamp(2.2rem, 5vw, 4rem); font-weight: 300; color: var(--white); letter-spacing: 0.08em; line-height: 1.2; margin-bottom: 1rem; position: relative; }
.page-hero-sub { font-family: 'Noto Serif JP', serif; font-size: 0.95rem; font-weight: 300; color: rgba(255,255,255,0.6); letter-spacing: 0.2em; position: relative; }
.breadcrumb { position: relative; display: flex; align-items: center; justify-content: center; gap: 0.5rem; margin-top: 2.5rem; font-size: 0.68rem; letter-spacing: 0.15em; color: rgba(255,255,255,0.4); }
.breadcrumb a { color: rgba(255,255,255,0.5); text-decoration: none; transition: color 0.2s; }
.breadcrumb a:hover { color: var(--gold); }

/* ========== INNER PAGE LAYOUT ========== */
.inner-section { max-width: 900px; margin: 0 auto; padding: 5rem 2rem; }
.inner-section-wide { max-width: 1100px; margin: 0 auto; padding: 5rem 2rem; }

/* ========== PRODUCTS PAGE ========== */
.product-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; margin-top: 3rem; }
.product-detail-card { background: var(--cream); padding: 3rem 2.5rem; position: relative; overflow: hidden; transition: transform 0.4s; }
.product-detail-card:hover { transform: translateY(-4px); }
.product-detail-card::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px; background: var(--gold); transform: scaleX(0); transition: transform 0.4s; }
.product-detail-card:hover::after { transform: scaleX(1); }
.pdc-icon { width: 64px; height: 64px; border-radius: 50%; background: #d4ecf7; display: flex; align-items: center; justify-content: center; margin-bottom: 1.5rem; }
.pdc-icon svg { width: 30px; height: 30px; }
.pdc-title { font-family: 'Cormorant Garamond', serif; font-size: 1.5rem; font-weight: 400; color: var(--deep-green); letter-spacing: 0.08em; margin-bottom: 0.8rem; }
.pdc-body { font-family: 'Noto Serif JP', serif; font-size: 0.88rem; line-height: 2; color: var(--text-mid); font-weight: 300; }
.pdc-list { list-style: none; margin-top: 1.2rem; display: flex; flex-direction: column; gap: 0.4rem; }
.pdc-list li { font-size: 0.8rem; color: var(--text-mid); padding-left: 1rem; position: relative; }
.pdc-list li::before { content: '—'; position: absolute; left: 0; color: var(--gold); font-size: 0.7rem; }

/* ========== SUSTAINABILITY PAGE ========== */
.sustain-full-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; margin-top: 3rem; }
.sustain-initiative { padding: 2.5rem; border: 1px solid rgba(44,74,62,0.12); background: var(--white); transition: border-color 0.3s; }
.sustain-initiative:hover { border-color: var(--gold); }
.si-num { font-family: 'Cormorant Garamond', serif; font-size: 3rem; font-weight: 300; color: var(--gold-light); line-height: 1; margin-bottom: 0.5rem; }
.si-title { font-family: 'Cormorant Garamond', serif; font-size: 1.3rem; font-weight: 400; color: var(--deep-green); letter-spacing: 0.05em; margin-bottom: 0.8rem; }
.si-body { font-size: 0.85rem; line-height: 2; color: var(--text-mid); font-weight: 300; font-family: 'Noto Serif JP', serif; }
.sustain-pledge { background: var(--deep-green); padding: 4rem 3rem; text-align: center; margin-top: 5rem; }
.sustain-pledge h3 { font-family: 'Cormorant Garamond', serif; font-size: 2rem; font-weight: 300; color: var(--white); letter-spacing: 0.1em; margin-bottom: 1rem; }
.sustain-pledge p { font-family: 'Noto Serif JP', serif; font-size: 0.9rem; color: rgba(255,255,255,0.7); line-height: 2; font-weight: 300; }

/* ========== CONTACT PAGE ========== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; margin-top: 3rem; }
.contact-info h3 { font-family: 'Cormorant Garamond', serif; font-size: 1.5rem; font-weight: 300; color: var(--deep-green); margin-bottom: 1.5rem; }
.contact-info-item { display: flex; flex-direction: column; gap: 0.2rem; padding: 1.2rem 0; border-bottom: 1px solid rgba(44,74,62,0.1); }
.ci-label { font-size: 0.65rem; letter-spacing: 0.25em; color: var(--gold); }
.ci-value { font-size: 0.9rem; color: var(--text-dark); letter-spacing: 0.05em; }
.contact-form { display: flex; flex-direction: column; gap: 1.2rem; }
.contact-form label { font-size: 0.72rem; letter-spacing: 0.2em; color: var(--text-mid); display: block; margin-bottom: 0.4rem; }
.contact-form input, .contact-form textarea, .contact-form select { width: 100%; padding: 0.85rem 1rem; border: 1px solid rgba(44,74,62,0.2); background: var(--cream); font-family: 'Noto Sans JP', sans-serif; font-size: 0.88rem; color: var(--text-dark); outline: none; transition: border-color 0.3s; }
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus { border-color: var(--gold); }
.contact-form textarea { resize: vertical; min-height: 140px; }
.contact-submit { display: inline-block; padding: 0.9rem 3rem; background: var(--deep-green); color: var(--white); font-size: 0.75rem; letter-spacing: 0.25em; border: none; cursor: pointer; transition: background 0.3s; font-family: 'Noto Sans JP', sans-serif; align-self: flex-start; }
.contact-submit:hover { background: #0d4f6e; }

/* ========== FAQ PAGE ========== */
.faq-list { list-style: none; margin-top: 2rem; }
.faq-item { border-top: 1px solid rgba(44,74,62,0.1); padding: 1.5rem 0; }
.faq-item:last-child { border-bottom: 1px solid rgba(44,74,62,0.1); }
.faq-q { display: flex; align-items: flex-start; gap: 1rem; cursor: pointer; background: none; border: none; width: 100%; text-align: left; }
.faq-q-mark { font-family: 'Cormorant Garamond', serif; font-size: 1.4rem; font-weight: 400; color: var(--gold); flex-shrink: 0; line-height: 1.3; }
.faq-q-text { font-size: 0.92rem; color: var(--text-dark); line-height: 1.7; flex: 1; font-weight: 400; padding-top: 0.1rem; }
.faq-q-arrow { flex-shrink: 0; font-size: 0.8rem; color: var(--gold); transition: transform 0.3s; margin-top: 0.2rem; }
.faq-item.open .faq-q-arrow { transform: rotate(180deg); }
.faq-a { display: none; padding: 1rem 0 0 2.2rem; }
.faq-item.open .faq-a { display: block; }
.faq-a-text { font-family: 'Noto Serif JP', serif; font-size: 0.88rem; line-height: 2; color: var(--text-mid); font-weight: 300; }

/* ========== PRIVACY PAGE ========== */
.privacy-body { max-width: 800px; margin: 0 auto; padding: 5rem 2rem; }
.privacy-section { margin-bottom: 3rem; }
.privacy-section h3 { font-family: 'Cormorant Garamond', serif; font-size: 1.3rem; font-weight: 400; color: var(--deep-green); letter-spacing: 0.05em; margin-bottom: 0.8rem; padding-bottom: 0.5rem; border-bottom: 1px solid rgba(44,74,62,0.15); }
.privacy-section p, .privacy-section li { font-family: 'Noto Serif JP', serif; font-size: 0.88rem; line-height: 2.1; color: var(--text-mid); font-weight: 300; }
.privacy-section ul { list-style: none; padding-left: 1rem; }
.privacy-section li { position: relative; padding-left: 1rem; }
.privacy-section li::before { content: '・'; position: absolute; left: 0; color: var(--gold); }

/* ========== RESPONSIVE additions ========== */
@media (max-width: 768px) {
  .product-detail-grid { grid-template-columns: 1fr; }
  .sustain-full-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .news-full-item { grid-template-columns: 1fr; gap: 0.4rem; }
}

/* ── 取水システム3ステップ（モバイル） ── */
@media (max-width: 768px) {
  .dsw-intake-steps {
    grid-template-columns: 1fr !important;
  }
}

/* ── 5大特性 レスポンシブ ── */
@media (max-width: 768px) {
  .dsw5-intro-grid {
    grid-template-columns: 1fr !important;
    gap: 2rem !important;
  }
  .dsw5-item {
    grid-template-columns: 48px 120px 1fr !important;
  }
  .dsw5-item > div:nth-child(3) {
    padding: 1.5rem 1.2rem !important;
  }
}
@media (max-width: 600px) {
  .dsw5-item {
    grid-template-columns: 1fr !important;
  }
  .dsw5-item > div:nth-child(1) {
    padding: 1rem 1.5rem 0 !important;
    border-right: none !important;
    border-bottom: none !important;
  }
  .dsw5-item > div:nth-child(2) {
    flex-direction: row !important;
    border-right: none !important;
    border-bottom: 1px solid rgba(44,74,62,0.08) !important;
    padding: 1rem 1.5rem !important;
    justify-content: flex-start !important;
    gap: 1rem !important;
  }
  .dsw5-item > div:nth-child(3) {
    padding: 1.5rem !important;
  }
}