/* =========================================
   terrawell.jp — Global Site Styles
   ========================================= */

:root {
  --clr-bg: #ffffff;
  --clr-bg-alt: #f7f6f4;
  --clr-bg-dark: #1a1a1a;
  --clr-text: #1a1a1a;
  --clr-text-muted: #6b6b6b;
  --clr-text-light: #9a9a9a;
  --clr-border: #e4e2df;
  --clr-accent: #4a6741;   /* muted forest green — mineral/nature tone */
  --clr-accent-light: #e8ede7;

  --font-sans: 'Inter', 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', Meiryo, sans-serif;
  --font-serif: 'Noto Serif JP', 'Yu Mincho', YuMincho, 'Hiragino Mincho ProN', serif;

  --max-w: 1120px;
  --gutter: clamp(1.25rem, 5vw, 2.5rem);

  --radius: 4px;
  --transition: 0.25s ease;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; overflow-x: clip; }
body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.8;
  letter-spacing: 0.05em;
  color: var(--clr-text);
  background: var(--clr-bg);
  overflow-x: hidden;
  overflow-x: clip;
  line-break: strict; /* 和文の行頭禁則（句読点・小書き仮名を行頭に置かない）。改行位置を整えるだけで横溢れは起こさない */
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ---- 折り返し制御ユーティリティ（地名・固有名詞・型番・認定番号・数値単位・URL/メール を語の途中で割らない） ---- */
.nowrap { white-space: nowrap; }

/* ---- 和文見出しは明朝（Noto Serif JP） ---- */
h1, h2, h3, h4, h5, h6 { font-family: var(--font-serif); }

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

/* ---- Typography helpers ---- */
.section-eyebrow {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 0.75rem;
}
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--clr-text);
}
.section-lead {
  font-size: 1.0625rem;
  color: var(--clr-text-muted);
  max-width: 56ch;
  line-height: 1.75;
}

/* ========================================
   HEADER
   ======================================== */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--clr-border);
  transition: box-shadow var(--transition);
}
.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.header-logo {
  font-size: 1.1875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--clr-text);
}
.header-logo span {
  font-weight: 300;
  font-size: 0.75rem;
  color: var(--clr-text-muted);
  margin-left: 0.5rem;
  letter-spacing: 0.06em;
}
.site-nav ul {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.site-nav a {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  transition: color var(--transition);
}
.site-nav a:hover { color: var(--clr-text); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding-inline: 1.125rem;
  background: var(--clr-text);
  color: var(--clr-bg) !important;
  border-radius: var(--radius);
  font-size: 0.8125rem !important;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: background var(--transition) !important;
}
.nav-cta:hover { background: #333 !important; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--clr-text);
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ========================================
   HERO
   ======================================== */
.hero {
  min-height: 100svh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--clr-bg);
  overflow: hidden;
}
.hero-content {
  display: flex;
  align-items: center;
  padding-block: calc(64px + 5rem) 5rem;
  padding-inline-start: max(var(--gutter), calc((100vw - var(--max-w)) / 2 + var(--gutter)));
  padding-inline-end: clamp(2.5rem, 5vw, 5rem);
}
.hero-content-inner {
  width: 100%;
}
.hero-image {
  position: relative;
  overflow: hidden;
}
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}
.hero-eyebrow {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--clr-text-light);
  margin-bottom: 1.25rem;
}
.hero-eyebrow::before {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: var(--clr-border);
  margin-bottom: 1rem;
}
.hero-title {
  font-size: clamp(1.5rem, 2.6vw, 1.875rem);
  font-weight: 300;
  letter-spacing: 0.02em;
  line-height: 1.1;
  color: var(--clr-text);
  margin-bottom: 1.5rem;
}
.hero-brand-statement {
  font-family: var(--font-serif);
  font-size: clamp(2.125rem, 4.5vw, 3.25rem);
  font-weight: 400;
  color: var(--clr-text);
  max-width: 24ch;
  line-height: 1.45;
  letter-spacing: 0.01em;
  margin-bottom: 1.25rem;
}
.hero-brand-statement--sub {
  font-family: var(--font-sans);
  font-size: clamp(0.9375rem, 1.4vw, 1.0625rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--clr-text-muted);
  margin-bottom: 2.5rem;
}
.hero-subtitle {
  font-size: clamp(1rem, 2.2vw, 1.3125rem);
  font-weight: 300;
  color: var(--clr-text-muted);
  max-width: 52ch;
  line-height: 1.6;
  margin-bottom: 2.5rem;
}
.hero-features-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-light);
  margin-bottom: 0.625rem;
}
.hero-features {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 3rem;
}
.hero-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: var(--clr-text-muted);
}
.hero-features li::before {
  content: '';
  display: block;
  flex-shrink: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--clr-accent);
  margin-top: 0.6em;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
}
.hero-spec-line {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: clamp(0.9375rem, 1.4vw, 1.0625rem);
  color: var(--clr-text-muted);
  line-height: 1.6;
}
.hero-epd-label {
  margin: 0 0 0.5rem;
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-light);
}
.hero-epd {
  margin-top: 2.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--clr-border);
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 1rem;
}
.hero-epd-text {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.hero-epd-text p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  line-height: 1.5;
}
.hero-epd-text a {
  font-size: 0.875rem;
  color: var(--clr-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  margin-top: 0.25rem;
}
.hero-epd-text a:hover { opacity: 0.75; }
.epd-logo {
  width: 64px;
  height: auto;
  flex-shrink: 0;
}
.hero-image-caption {
  position: absolute;
  right: clamp(0.75rem, 2vw, 1.5rem);
  bottom: clamp(0.75rem, 2vw, 1.5rem);
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: #5a5a5a;
  background: rgba(255, 255, 255, 0.8);
  padding: 0.4rem 0.75rem;
  border-radius: 2px;
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}
/* Hero画像：将来のクロスフェード拡張に対応（現在は1枚のみ表示） */
.hero-image-stack { position: absolute; inset: 0; }
.hero-slide { position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease; }
.hero-slide.is-active { opacity: 1; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--clr-text);
  color: var(--clr-bg);
}
.btn-primary:hover { background: #333; }
.btn-secondary {
  background: transparent;
  color: var(--clr-text);
  border-color: var(--clr-border);
}
.btn-secondary:hover {
  border-color: var(--clr-text);
  background: var(--clr-bg-alt);
}
.btn svg { flex-shrink: 0; }

/* ========================================
   WHY ARCHITECTS SECTION
   ======================================== */
.why-section {
  padding-block: 6rem;
  background: var(--clr-bg-dark);
  color: #ffffff;
}
.why-section .section-eyebrow { color: #8aad85; }
.why-header {
  max-width: 64ch;
  margin-bottom: 3.5rem;
}
.why-intro {
  font-size: 1.0625rem;
  color: #b0b0b0;
  line-height: 1.75;
  margin-top: 0.875rem;
}
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5px;
  background: rgba(255,255,255,0.08);
  border: 1.5px solid rgba(255,255,255,0.08);
  border-radius: calc(var(--radius) * 2);
  overflow: hidden;
}
.why-card {
  background: var(--clr-bg-dark);
  padding: 2.25rem 1.75rem 2.5rem;
  transition: background var(--transition);
}
.why-card:hover { background: #222222; }
.why-icon {
  width: 40px;
  height: 40px;
  color: #8aad85;
  margin-bottom: 1.25rem;
}
.why-icon svg { width: 100%; height: 100%; }
.why-card-title {
  font-size: 1rem;
  font-weight: 500;
  color: #ffffff;
  letter-spacing: -0.01em;
  margin-bottom: 0.625rem;
  line-height: 1.35;
}
.why-card-text {
  font-size: 0.875rem;
  color: #808080;
  line-height: 1.75;
}

/* ========================================
   WHAT IS SECTION
   ======================================== */
.what-section {
  padding-block: 6rem;
  background: var(--clr-bg-alt);
}
.what-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.what-image {
  aspect-ratio: 4/3;
  background: var(--clr-border);
  border-radius: calc(var(--radius) * 2);
  overflow: hidden;
}
.what-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.what-text { }
.what-text .section-title { margin-bottom: 1.25rem; }
.what-text .section-lead { margin-bottom: 1.5rem; }
.what-text p {
  font-size: 0.9375rem;
  color: var(--clr-text-muted);
  line-height: 1.8;
}
.what-text p + p { margin-top: 1rem; }

/* ========================================
   WHY CTA ROW
   ======================================== */
.why-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.why-cta-text {
  font-size: 0.9375rem;
  color: #b0b0b0;
}
.why-cta-btn {
  background: transparent;
  color: #ffffff;
  border: 1px solid rgba(255,255,255,0.25);
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  white-space: nowrap;
}
.why-cta-btn:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.4);
}

/* ========================================
   APPLICATIONS (simple cards)
   ======================================== */
.apps-section {
  padding-block: 6rem;
  background: var(--clr-bg-alt);
}
.apps-header {
  max-width: 56ch;
  margin-bottom: 3rem;
}
.apps-intro {
  font-size: 1.0625rem;
  color: var(--clr-text-muted);
  line-height: 1.75;
  margin-top: 0.875rem;
}
.apps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5px;
  background: var(--clr-border);
  border: 1.5px solid var(--clr-border);
  border-radius: calc(var(--radius) * 2);
  overflow: hidden;
  margin-bottom: 1.5rem;
}
.app-simple-card {
  background: var(--clr-bg);
  padding: 2.25rem 1.75rem 2.5rem;
  transition: background var(--transition);
}
.app-simple-card:hover { background: var(--clr-bg-alt); }
.app-simple-icon {
  width: 38px;
  height: 38px;
  color: var(--clr-accent);
  margin-bottom: 1.25rem;
}
.app-simple-icon svg { width: 100%; height: 100%; }
.app-simple-title {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
  color: var(--clr-text);
}
.app-simple-text {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  line-height: 1.7;
}
.apps-note {
  font-size: 0.8125rem;
  color: var(--clr-text-light);
  font-style: italic;
  text-align: center;
}

/* ========================================
   SUSTAINABILITY
   ======================================== */
.sustain-section {
  padding-block: 6rem;
  background: var(--clr-bg-dark);
  color: #ffffff;
}
.sustain-section .section-eyebrow { color: #8aad85; }
.sustain-section .section-title { color: #ffffff; font-weight: 200; }
.sustain-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: end;
  margin-bottom: 3rem;
}
.sustain-intro {
  font-size: 1.0625rem;
  color: #b0b0b0;
  line-height: 1.75;
  max-width: 42ch;
}
.sustain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5px;
  background: rgba(255,255,255,0.08);
  border: 1.5px solid rgba(255,255,255,0.08);
  border-radius: calc(var(--radius) * 2);
  overflow: hidden;
}
.sustain-card {
  background: var(--clr-bg-dark);
  padding: 2.25rem 1.75rem 2.5rem;
  transition: background var(--transition);
}
.sustain-card:hover { background: #222; }
.sustain-icon {
  width: 38px;
  height: 38px;
  color: #8aad85;
  margin-bottom: 1.25rem;
}
.sustain-icon svg { width: 100%; height: 100%; }
.sustain-card-title {
  font-size: 1rem;
  font-weight: 500;
  color: #ffffff;
  margin-bottom: 0.625rem;
  line-height: 1.35;
}
.sustain-card-text {
  font-size: 0.875rem;
  color: #808080;
  line-height: 1.75;
}

/* EPD detail panel */
.sustain-epd {
  margin-top: 2rem;
  border: 1.5px solid rgba(138, 173, 133, 0.25);
  border-radius: calc(var(--radius) * 2);
  padding: 1.75rem 2rem;
  display: flex;
  gap: 2rem;
  align-items: center;
  flex-wrap: wrap;
}
.sustain-epd-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 72px;
  padding: 0.75rem 1rem;
  border: 1.5px solid rgba(138, 173, 133, 0.35);
  border-radius: var(--radius);
  text-align: center;
  flex-shrink: 0;
}
.sustain-epd-badge-label {
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8aad85;
}
.sustain-epd-badge-name {
  font-size: 1.375rem;
  font-weight: 600;
  color: #8aad85;
  line-height: 1;
  margin-top: 0.2rem;
  letter-spacing: -0.01em;
}
.sustain-epd-data {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem 2.5rem;
  min-width: 0;
}
.sustain-epd-row { display: flex; flex-direction: column; gap: 0.15rem; }
.sustain-epd-label {
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: #555;
}
.sustain-epd-value {
  font-size: 0.875rem;
  color: #c0c0c0;
  line-height: 1.45;
}
.sustain-epd-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8125rem;
  color: #8aad85;
  border: 1px solid rgba(138, 173, 133, 0.35);
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition);
}
.sustain-epd-link:hover {
  background: rgba(138, 173, 133, 0.1);
  border-color: rgba(138, 173, 133, 0.55);
}

/* Sustainability — EPD + SBTi card grid */
.sustain-cert-grid {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.sustain-cert-card {
  border: 1.5px solid rgba(138, 173, 133, 0.25);
  border-radius: calc(var(--radius) * 2);
  padding: 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.sustain-sbti-logo-wrap {
  position: relative;
  width: 350px;
  height: 140px;
  align-self: center;
  flex-shrink: 0;
}
.sustain-sbti-logo {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 140px;
  height: 350px;
  object-fit: contain;
  transform: translate(-50%, -50%) rotate(90deg);
}
.sustain-sbti-body { flex: 1; margin-top: 1rem; }
.sustain-sbti-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: #8aad85;
  letter-spacing: 0.06em;
  margin-bottom: 0.625rem;
}
.sustain-sbti-text {
  font-size: 0.875rem;
  color: #c0c0c0;
  line-height: 1.75;
}

/* Carbon lifecycle callout — Performance section (light bg) */
.perf-carbon-callout {
  margin-top: 2.5rem;
  margin-bottom: 2rem;
  padding: 2rem 2.25rem;
  background: var(--clr-bg-alt);
  border-left: 3px solid var(--clr-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.perf-carbon-quote {
  font-size: 1rem;
  color: var(--clr-text);
  line-height: 1.8;
  font-style: italic;
  margin-bottom: 1.5rem;
  max-width: 72ch;
}
.perf-carbon-data {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.875rem 2.5rem;
  margin-bottom: 1.25rem;
}
.perf-carbon-item { display: flex; flex-direction: column; gap: 0.15rem; }
.perf-carbon-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--clr-text-light);
}
.perf-carbon-value {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--clr-text);
  line-height: 1.4;
}
.perf-carbon-note {
  font-size: 0.775rem;
  color: var(--clr-text-muted);
  line-height: 1.5;
}
.perf-carbon-epd-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8125rem;
  color: var(--clr-accent);
  text-decoration: none;
  border: 1px solid var(--clr-border);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  transition: background var(--transition), border-color var(--transition);
}
.perf-carbon-epd-link:hover {
  background: var(--clr-accent-light);
  border-color: var(--clr-accent);
}

/* Carbon lifecycle callout — Sustainability section (dark bg) */
.sustain-carbon-callout {
  margin-top: 2rem;
  padding: 2rem 2.25rem;
  border-left: 3px solid #8aad85;
  background: rgba(138, 173, 133, 0.05);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.sustain-carbon-quote {
  font-size: 1rem;
  color: #d0d0d0;
  line-height: 1.8;
  font-style: italic;
  margin-bottom: 1.5rem;
  max-width: 72ch;
}
.sustain-carbon-data {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.875rem 2.5rem;
  margin-bottom: 1.25rem;
}
.sustain-carbon-item { display: flex; flex-direction: column; gap: 0.15rem; }
.sustain-carbon-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: #4e4e4e;
}
.sustain-carbon-value {
  font-size: 0.9375rem;
  font-weight: 500;
  color: #d8d8d8;
  line-height: 1.4;
}
.sustain-carbon-note {
  font-size: 0.775rem;
  color: #707070;
  line-height: 1.5;
}

/* ========================================
   TECHNICAL / DOWNLOAD
   ======================================== */
.technical-section {
  padding-block: 6rem;
  background: var(--clr-bg-alt);
}
.technical-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: end;
  margin-bottom: 3rem;
}
.technical-for-architects {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-light);
  margin-bottom: 0.5rem;
}
.technical-intro {
  font-size: 1.0625rem;
  color: var(--clr-text-muted);
  line-height: 1.75;
  max-width: 42ch;
}
.technical-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5px;
  background: var(--clr-border);
  border: 1.5px solid var(--clr-border);
  border-radius: calc(var(--radius) * 2);
  overflow: hidden;
  margin-bottom: 1.5rem;
}
.technical-item {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  align-items: center;
  gap: 1.25rem;
  padding: 1.75rem 1.5rem;
  background: var(--clr-bg);
  transition: background var(--transition);
}
.technical-item:hover { background: var(--clr-bg-alt); }
.technical-item-icon {
  width: 40px;
  height: 40px;
  color: var(--clr-text-muted);
  flex-shrink: 0;
}
.technical-item-icon svg { width: 100%; height: 100%; }
.technical-item-text h3 {
  font-size: 0.9375rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: var(--clr-text);
}
.technical-item-text p {
  font-size: 0.8125rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
}
.technical-download {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--clr-text);
  white-space: nowrap;
  transition: all var(--transition);
  flex-shrink: 0;
}
.technical-download:hover {
  border-color: var(--clr-text);
  background: var(--clr-bg-alt);
}
.technical-note {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  line-height: 1.7;
  text-align: center;
}
.technical-note a {
  color: var(--clr-text);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ========================================
   GALLERY NOTE
   ======================================== */
.gallery-note {
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--clr-text-light);
  text-align: center;
  font-style: italic;
}

/* ========================================
   PERFORMANCE & TESTED RESULTS
   ======================================== */
.perf-section {
  padding-block: 6rem;
  background: var(--clr-bg);
}
.perf-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: end;
  margin-bottom: 3rem;
}
.perf-header-left { }
.perf-intro {
  font-size: 1.0625rem;
  color: var(--clr-text-muted);
  line-height: 1.75;
  max-width: 42ch;
}
.perf-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5px;
  background: var(--clr-border);
  border: 1.5px solid var(--clr-border);
  border-radius: calc(var(--radius) * 2);
  overflow: hidden;
  margin-bottom: 1.5rem;
}
.perf-card {
  background: var(--clr-bg-alt);
  padding: 2.5rem 2rem 2.75rem;
  transition: background var(--transition);
}
.perf-card:hover { background: #edeae4; }
.perf-icon {
  width: 38px;
  height: 38px;
  color: var(--clr-accent);
  margin-bottom: 1.25rem;
}
.perf-icon svg { width: 100%; height: 100%; }
.perf-card-title {
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 0.625rem;
  color: var(--clr-text);
  line-height: 1.35;
}
.perf-card-text {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  line-height: 1.75;
}
.perf-tested-by {
  font-size: 0.8125rem;
  color: var(--clr-text-light);
  font-style: italic;
  margin-bottom: 1.75rem;
}
.perf-data-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0.875rem;
}
.perf-data-list li {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  line-height: 1.65;
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--clr-border);
}
.perf-data-list li:last-child { border-bottom: none; }
.perf-data-list strong {
  color: var(--clr-text);
  font-weight: 500;
}
.perf-card-note {
  font-size: 0.775rem;
  color: var(--clr-text-light);
  font-style: italic;
  margin-top: 0.75rem;
  line-height: 1.5;
}
.perf-cards-note {
  font-size: 0.775rem;
  color: var(--clr-text-light);
  font-style: italic;
  margin-top: 1.5rem;
  margin-bottom: 0;
}
.perf-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding-top: 1.75rem;
  border-top: 1px solid var(--clr-border);
}
.perf-cta-text {
  font-size: 0.9375rem;
  color: var(--clr-text-muted);
}
.perf-cta-btn {
  background: var(--clr-text);
  color: var(--clr-bg);
  font-size: 0.875rem;
  padding: 0.625rem 1.25rem;
  white-space: nowrap;
}
.perf-cta-btn:hover { background: #333; }

/* ========================================
   FEATURES
   ======================================== */
.features-section {
  padding-block: 6rem;
  background: var(--clr-bg);
}
.features-header {
  max-width: 48ch;
  margin-bottom: 3.5rem;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5px;
  background: var(--clr-border);
  border: 1.5px solid var(--clr-border);
  border-radius: calc(var(--radius) * 2);
  overflow: hidden;
}
.feature-card {
  background: var(--clr-bg);
  padding: 2.5rem 2rem;
  transition: background var(--transition);
}
.feature-card:hover { background: var(--clr-bg-alt); }
.feature-icon {
  width: 44px;
  height: 44px;
  margin-bottom: 1.25rem;
  color: var(--clr-accent);
}
.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 0.625rem;
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  line-height: 1.7;
}
.feature-note {
  font-size: 0.8125rem !important;
  color: var(--clr-text-light) !important;
  margin-top: 0.5rem;
  font-style: italic;
}

/* ========================================
   APPLICATIONS
   ======================================== */
.applications-section {
  padding-block: 6rem;
  background: var(--clr-bg-alt);
}
.applications-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}
.applications-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.app-card {
  background: var(--clr-bg);
  border-radius: calc(var(--radius) * 2);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.app-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}
.app-card-img {
  aspect-ratio: 3/4;
  background: var(--clr-border);
  overflow: hidden;
  position: relative;
}
.app-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.app-card:hover .app-card-img img { transform: scale(1.04); }
.app-card-img-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: #e8e6e3;
  text-align: center;
}
.app-card-img-placeholder p {
  font-size: 0.875rem;
  font-style: italic;
  color: #8a8a8a;
  line-height: 1.65;
}
.app-card-body {
  padding: 1rem 1.125rem 1.25rem;
}
.app-card-body h3 {
  font-size: 0.9375rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}
.app-card-body p {
  font-size: 0.8125rem;
  color: var(--clr-text-muted);
  line-height: 1.55;
}

/* ========================================
   SPECIFICATIONS
   ======================================== */
.specs-section {
  padding-block: 6rem;
  background: var(--clr-bg);
}
.specs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.specs-table-wrap { }
.specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}
.specs-table tr {
  border-bottom: 1px solid var(--clr-border);
}
.specs-table tr:first-child {
  border-top: 1px solid var(--clr-border);
}
.specs-table th {
  width: 40%;
  padding: 0.875rem 0;
  font-weight: 500;
  font-size: 0.875rem;
  text-align: left;
  color: var(--clr-text-muted);
  vertical-align: top;
}
.specs-table td {
  padding: 0.875rem 0 0.875rem 1rem;
  color: var(--clr-text);
  line-height: 1.6;
}
.specs-note {
  margin-top: 1.25rem;
  font-size: 0.8125rem;
  color: var(--clr-text-light);
  line-height: 1.65;
  font-style: italic;
}
.specs-cta-box {
  background: var(--clr-bg-alt);
  border-radius: calc(var(--radius) * 2);
  padding: 2.5rem;
}
.specs-cta-box h3 {
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
}
.specs-cta-box p {
  font-size: 0.9375rem;
  color: var(--clr-text-muted);
  line-height: 1.7;
  margin-bottom: 1.75rem;
}

/* ========================================
   MADE IN JAPAN
   ======================================== */
.mij-section {
  padding-block: 6rem;
  background: var(--clr-bg-dark);
  color: #ffffff;
}
.mij-section .section-eyebrow { color: #8aad85; }
.mij-section .section-title { color: #ffffff; font-weight: 200; }
.mij-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-top: 3rem;
}
.mij-text p {
  font-size: 0.9375rem;
  color: #b0b0b0;
  line-height: 1.8;
  margin-top: 1.25rem;
}
.mij-points {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.mij-point {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.mij-point-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  margin-top: 0.1em;
}
.mij-point-text h4 {
  font-size: 0.9375rem;
  font-weight: 500;
  color: #ffffff;
  margin-bottom: 0.25rem;
}
.mij-point-text p {
  font-size: 0.875rem;
  color: #808080;
  line-height: 1.65;
  margin-top: 0 !important;
}

/* ========================================
   NEWS
   ======================================== */
.news-section {
  padding-block: 6rem;
  background: var(--clr-bg-alt);
}
.news-header {
  margin-bottom: 2.5rem;
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5px;
  background: var(--clr-border);
  border: 1.5px solid var(--clr-border);
  border-radius: calc(var(--radius) * 2);
  overflow: hidden;
}
.news-card {
  background: var(--clr-bg-alt);
  padding: 2rem 1.75rem 2.25rem;
  transition: background var(--transition);
}
.news-card:hover { background: #edeae4; }
.news-date {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 0.75rem;
  font-style: normal;
}
.news-card-title {
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--clr-text);
  line-height: 1.35;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}
.news-card-text {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  line-height: 1.75;
}

/* ========================================
   CONTACT
   ======================================== */
.contact-section {
  padding-block: 6rem;
  background: var(--clr-bg);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}
.contact-intro .section-title { margin-bottom: 1rem; }
.contact-intro .section-lead { margin-bottom: 2rem; }
.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.contact-item label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--clr-text-light);
  margin-bottom: 0.25rem;
}
.contact-item a,
.contact-item p {
  font-size: 0.9375rem;
  color: var(--clr-text);
  line-height: 1.65;
}
.contact-item a:hover { color: var(--clr-accent); }
.contact-form {
  background: var(--clr-bg-alt);
  border-radius: calc(var(--radius) * 2);
  padding: 2.5rem;
}
.contact-form h3 {
  font-size: 1.125rem;
  font-weight: 400;
  margin-bottom: 1.5rem;
}
.form-group {
  margin-bottom: 1rem;
}
.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  margin-bottom: 0.375rem;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 0.875rem;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--clr-text);
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color var(--transition);
  appearance: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--clr-text-muted);
}
.form-group textarea { resize: vertical; min-height: 110px; line-height: 1.6; }
.form-submit { margin-top: 1.25rem; }
.form-submit .btn { width: 100%; justify-content: center; }
.form-privacy {
  margin-top: 0.875rem;
  font-size: 0.75rem;
  color: var(--clr-text-light);
  text-align: center;
  line-height: 1.55;
}

/* ========================================
   FOOTER
   ======================================== */
.site-footer {
  background: var(--clr-bg-dark);
  color: #808080;
  padding-block: 3rem 2rem;
}
.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-wrap: wrap;
}
.footer-brand {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #ffffff;
  margin-bottom: 0.625rem;
}
.footer-tagline {
  font-size: 0.8125rem;
  color: #666;
  line-height: 1.6;
  max-width: 28ch;
}
.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer-nav a {
  font-size: 0.875rem;
  color: #808080;
  transition: color var(--transition);
}
.footer-nav a:hover { color: #ffffff; }
.footer-bottom {
  padding-top: 1.75rem;
  font-size: 0.8125rem;
  color: #4a4a4a;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ========================================
   SURFACE & TEXTURE
   ======================================== */
.surface-section {
  padding-block: var(--section-gap);
  border-top: 1px solid var(--clr-border);
}
.surface-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 5rem);
  align-items: start;
}
.surface-text .section-eyebrow { margin-bottom: 1rem; }
.surface-text .section-title { margin-bottom: 1.5rem; }
.surface-text p {
  color: var(--clr-text-muted);
  line-height: 1.75;
  margin-bottom: 1rem;
}
.surface-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 2rem;
  border-top: 1px solid var(--clr-border);
}
.surface-list li {
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--clr-border);
  font-size: 0.9375rem;
  color: var(--clr-text);
  display: flex;
  align-items: center;
  gap: 0.625rem;
}
.surface-list li::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--clr-accent);
  flex-shrink: 0;
}
.surface-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}
.surface-img-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
.surface-fig {
  margin: 0;
}
.surface-fig--duo {
  grid-column: 1 / -1;
}
.surface-fig-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
.surface-fig img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
  background: var(--clr-bg-alt);
}
.surface-fig figcaption {
  margin-top: 0.5rem;
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-light);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.surface-fig-desc {
  font-size: 0.8125rem;
  letter-spacing: 0;
  text-transform: none;
  color: var(--clr-text-muted);
  line-height: 1.5;
}

/* ========================================
   BESPOKE PANELS
   ======================================== */
.bespoke-section {
  padding-block: var(--section-gap);
  border-top: 1px solid var(--clr-border);
}
.bespoke-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}
.bespoke-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}
.bespoke-thumb {
  display: block;
  padding: 0;
  border: none;
  background: var(--clr-bg-alt);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.bespoke-thumb:hover {
  opacity: 0.85;
  transform: scale(1.02);
}
.bespoke-thumb img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}
/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 900px) {
  .site-nav { display: none; }
  .hamburger { display: flex; }

  .site-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;                                   /* 全画面：上端の帯も含めどこも透けない */
    background-color: #ffffff;                  /* 不透明フォールバック（背後の本文を完全に隠す） */
    background-color: var(--clr-bg, #ffffff);
    padding: calc(64px + 1.5rem) var(--gutter, 1.5rem) 2rem;  /* 上端のロゴ/×帯ぶんを空ける */
    overflow-y: auto;                           /* メニューが長ければメニュー内だけスクロール */
    z-index: 200;                               /* ヘッダー(100)・本文より確実に前面 */
  }
  /* ロゴと×は不透明オーバーレイの上に出す（隠れないように） */
  .site-header .header-logo,
  .hamburger { position: relative; z-index: 201; }
  .site-nav.open ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }
  .site-nav.open ul li a {
    display: block;
    padding: 1.2rem 0;
    font-size: 1.125rem;
    border-bottom: 1px solid var(--clr-border);
    color: var(--clr-text);
  }
  .site-nav.open ul li:last-child a { border-bottom: none; }

  .hero {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
    min-height: unset;
    padding-top: 64px;
  }
  .hero-image {
    order: -1;
    min-height: unset;
    aspect-ratio: 1600 / 1307;
  }
  .hero-content {
    padding-block: 2rem 3rem;
    padding-inline: var(--gutter);
  }

  .what-grid,
  .surface-grid,
  .specs-grid,
  .mij-grid,
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }

  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .why-cta { flex-direction: column; align-items: flex-start; }
  .sustain-header { grid-template-columns: 1fr; gap: 1.25rem; }
  .sustain-grid { grid-template-columns: repeat(2, 1fr); }
  .sustain-epd { flex-direction: column; align-items: flex-start; gap: 1.25rem; }
  .sustain-epd-data { grid-template-columns: 1fr; gap: 0.625rem; }
  .sustain-cert-grid { grid-template-columns: 1fr; }
  .perf-carbon-data { grid-template-columns: 1fr; }
  .sustain-carbon-data { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .technical-header { grid-template-columns: 1fr; gap: 1.25rem; }
  .technical-grid { grid-template-columns: 1fr; }
  .apps-grid { grid-template-columns: repeat(2, 1fr); }
  .perf-header { grid-template-columns: 1fr; gap: 1.25rem; }
  .perf-grid { grid-template-columns: 1fr; }
  .bespoke-header { grid-template-columns: 1fr; gap: 1.25rem; }
  .bespoke-thumbs { grid-template-columns: repeat(3, 1fr); }
  .features-grid { grid-template-columns: 1fr; }

  .applications-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
}
@media (max-width: 600px) {
  .hero-title { font-size: clamp(1.5rem, 6vw, 2rem); }
  .bespoke-thumbs { grid-template-columns: repeat(2, 1fr); }
  .apps-grid { grid-template-columns: 1fr; }
  .perf-cta { flex-direction: column; align-items: flex-start; }
  .sustain-grid { grid-template-columns: 1fr; }
  .technical-item { grid-template-columns: 40px 1fr; }
  .technical-download { grid-column: 1 / -1; }
  .why-grid { grid-template-columns: 1fr; }
  .applications-grid { grid-template-columns: 1fr 1fr; }
  .footer-inner { flex-direction: column; gap: 1.5rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .contact-form { padding: 1.5rem; }
  .specs-cta-box { padding: 1.75rem; }
  .perf-carbon-callout,
  .sustain-carbon-callout { padding: 1.5rem 1.25rem; }
}
@media (max-width: 480px) {
  .applications-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .surface-fig-images { grid-template-columns: 1fr; }
}

/* ========================================
   LIGHTBOX
   ======================================== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}
.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, 0.92);
  cursor: zoom-out;
}
.lightbox-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  max-width: min(90vw, 1100px);
  max-height: 90vh;
  transform: scale(0.96);
  transition: transform 0.25s ease;
}
.lightbox.is-open .lightbox-content {
  transform: scale(1);
}
.lightbox-img {
  display: block;
  max-width: 100%;
  max-height: calc(90vh - 4rem);
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
}
.lightbox-caption {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.04em;
  text-align: center;
}
.lightbox-counter {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
  text-align: center;
  margin-top: 0.25rem;
}
.lightbox-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  color: #fff;
  font-size: 2rem;
  line-height: 1;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}
.lightbox-nav:hover { background: rgba(255,255,255,0.2); }
.lightbox-prev { left: 1.25rem; }
.lightbox-next { right: 1.25rem; }
.lightbox-close {
  position: fixed;
  top: 1.25rem;
  right: 1.5rem;
  z-index: 2;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}
.lightbox-close:hover { background: rgba(255,255,255,0.2); }

/* Clickable images (lightbox) */
.surface-fig img,
.surface-fig-images img,
.app-card-img img {
  cursor: zoom-in;
}

/* =========================================
   Hub（トップページ）— 認証帯・ティーザー
   ========================================= */
.cert-strip-section {
  background: var(--clr-bg-alt);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}
.cert-strip-section .container { padding-block: 2rem; }
.cert-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.25rem 2.5rem;
}
.cert-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.2rem;
}
.cert-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--clr-text-muted);
}
.cert-value {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--clr-text);
}

/* ティーザーカード（.why-card を流用したリンク） */
.teaser-card {
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition);
}
.teaser-card .card-link {
  margin-top: auto;
  padding-top: 0.85rem;
  color: var(--clr-accent);
  font-size: 0.875rem;
  font-weight: 500;
}
.teaser-card:hover {
  border-color: var(--clr-accent);
  transform: translateY(-2px);
}

/* フッター：株式会社加納のブランド群（控えめに、明確に） */
.footer-brands {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brands-label {
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: #666;
  margin-bottom: 1rem;
}
.footer-brands ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2.5rem;
}
.footer-brands a {
  font-size: 0.85rem;
  color: #909090;
  transition: color var(--transition);
}
.footer-brands a:hover { color: #ffffff; }
.footer-brands a span {
  margin-left: 0.45rem;
  font-size: 0.7rem;
  color: #5a5a5a;
}

/* =========================================
   HERO 再設計：平田タイル流フルブリード（背景画像＋暗オーバーレイ＋白文字）
   特長リストはヒーロー直下の独立セクションへ分離
   ========================================= */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100svh;
  overflow: hidden;
  isolation: isolate;
  background: #1a1a1a;
}
.hero .hero-image { position: absolute; inset: 0; z-index: 0; }
.hero .hero-image-stack { position: absolute; inset: 0; }
.hero .hero-slide { position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease; }
.hero .hero-slide.is-active { opacity: 1; }
.hero .hero-slide img { width: 100%; height: 100%; object-fit: cover; object-position: center; display: block; }
.hero .hero-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(12,12,12,0.74) 0%, rgba(12,12,12,0.52) 38%, rgba(12,12,12,0.22) 72%, rgba(12,12,12,0.10) 100%);
}
.hero .hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  padding-inline: clamp(1.5rem, 9vw, 10rem);
  padding-block: 0;
}
.hero .hero-content-inner { max-width: 60rem; width: 100%; }
.hero .hero-eyebrow {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.72);
  margin-bottom: 1.25rem;
}
.hero .hero-eyebrow::before {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: rgba(255,255,255,0.5);
  margin-bottom: 1rem;
}
.hero .hero-title {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1.1;
  color: rgba(255,255,255,0.85);
  margin-bottom: 1.5rem;
}
.hero .hero-brand-statement {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: 0.03em;
  color: #ffffff;
  max-width: none;
  text-shadow: 0 2px 30px rgba(0,0,0,0.45);
  margin-bottom: 1.75rem;
}
.hero .hero-nb { white-space: nowrap; }
.hero .hero-spec-line {
  margin: 0 0 0.4rem;
  font-size: clamp(1rem, 1.5vw, 1.1875rem);
  color: rgba(255,255,255,0.92);
  line-height: 1.6;
  text-shadow: 0 1px 16px rgba(0,0,0,0.4);
}
.hero .hero-brand-statement--sub {
  font-family: var(--font-sans);
  font-size: clamp(1rem, 1.5vw, 1.1875rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: rgba(255,255,255,0.92);
  line-height: 1.6;
  text-shadow: 0 1px 16px rgba(0,0,0,0.4);
  margin-bottom: 2.25rem;
}
.hero .hero-actions { display: flex; flex-wrap: wrap; gap: 0.875rem; }
.hero .btn-primary { background: #ffffff; color: #1a1a1a; border-color: #ffffff; }
.hero .btn-primary:hover { background: rgba(255,255,255,0.86); }
.hero .btn-secondary { background: transparent; color: #ffffff; border-color: rgba(255,255,255,0.55); }
.hero .btn-secondary:hover { background: rgba(255,255,255,0.12); border-color: #ffffff; }
.hero .hero-image-caption {
  position: absolute;
  z-index: 2;
  right: clamp(1rem, 3vw, 2.5rem);
  bottom: clamp(1rem, 3vw, 2rem);
  left: auto;
  margin: 0;
  padding: 0;
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: rgba(255,255,255,0.7);
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
/* 特長リスト：ヒーロー直下の独立セクション */
.hero-features-section {
  padding-block: clamp(3.5rem, 6vw, 5rem);
  background: var(--clr-bg);
  border-bottom: 1px solid var(--clr-border);
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: clamp(1.25rem, 2.5vw, 2.5rem);
}
.feature-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--clr-text);
}
.feature-num {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--clr-accent);
}
.feature-title {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 500;
  line-height: 1.45;
  color: var(--clr-text);
}
.feature-desc {
  font-size: 0.8125rem;
  color: var(--clr-text-muted);
  line-height: 1.65;
}
@media (max-width: 900px) {
  .hero { min-height: 86svh; align-items: flex-end; }
  .hero .hero-image::after {
    background: linear-gradient(180deg, rgba(12,12,12,0.30) 0%, rgba(12,12,12,0.50) 55%, rgba(12,12,12,0.80) 100%);
  }
  .hero .hero-content { padding-block: 0 13vh; }
  .hero .hero-content-inner { max-width: 100%; }
  .feature-grid { grid-template-columns: 1fr; gap: 0; }
  .feature-item { padding-block: 1.1rem; border-top: 1px solid var(--clr-border); }
  .feature-item:first-child { border-top: 1px solid var(--clr-text); }
}

/* =========================================
   カラーシステム更新：濃度引き上げ＋クレイブラウンのアクセント
   ========================================= */
:root {
  --clr-text: #1a1a1a;
  --clr-text-muted: #444444;
  --clr-text-light: #6b6b6b;
  --clr-accent: #c84b27;
  --clr-accent-light: #f7e8e2;
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #444444;
  --color-text-emphasis: #000000;
  --color-accent: #c84b27;
  --color-rule: #2b2b2b;
}
.num { color: var(--color-text-emphasis); font-weight: 600; letter-spacing: 0.01em; }
.hero .num { color: #ffffff; font-weight: 600; }
.btn-primary { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.btn-primary:hover { background: #a53d1f; border-color: #a53d1f; }
.hero .btn-primary { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.hero .btn-primary:hover { background: #a53d1f; border-color: #a53d1f; }
.section-eyebrow {
  position: relative;
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  color: var(--color-accent);
  padding-top: 1rem;
}
.section-eyebrow::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--color-accent);
}
.hero-features-section .section-eyebrow { margin-bottom: 1.75rem; }
.hero .hero-eyebrow { font-size: 0.8125rem; letter-spacing: 0.22em; color: rgba(255,255,255,0.92); }
.hero .hero-eyebrow::before { width: 48px; height: 3px; background: var(--color-accent); margin-bottom: 1.1rem; }
.cert-value { color: var(--color-text-emphasis); font-size: 1.0625rem; font-weight: 600; }
.cert-label { color: var(--color-text-secondary); }
.feature-num { color: var(--color-accent); font-weight: 700; font-size: 0.8125rem; }
.feature-desc { color: var(--color-text-secondary); }

/* =========================================
   Hero / Header 仕上げ：海外プレミアム建材ブランド水準
   （ヘッダー透明化・CTA再設計・繊細化）
   ========================================= */
.site-header { transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.25s ease; }

/* ナビ項目：濃色・Medium・字間広め・テラコッタ下線リビール（CTA含む全項目） */
.site-nav a {
  position: relative;
  color: var(--color-text-primary);
  font-weight: 500;
  letter-spacing: 0.06em;
  padding-bottom: 4px;
  transition: color 0.25s ease;
}
.site-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-accent);
  transition: width 0.25s ease;
}
.site-nav a:hover { color: var(--color-accent); }
.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after { width: 100%; }
.site-nav a[aria-current="page"] { color: var(--color-accent); }

/* お問い合わせ：黒ブロック廃止 → 文字のみ（他ナビと同階層） */
.nav-cta {
  height: auto !important;
  padding: 0 0 4px !important;
  background: transparent !important;
  color: var(--color-text-primary) !important;
  border-radius: 0 !important;
  font-size: 0.875rem !important;
  font-weight: 500 !important;
  letter-spacing: 0.06em !important;
}
.nav-cta:hover { background: transparent !important; color: var(--color-accent) !important; }

/* ヘッダー透明化（Hero上）／スクロールで白＋黒文字 */
.site-header.over-hero {
  background: transparent;
  border-bottom-color: transparent;
  box-shadow: none !important;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
/* ヒーロー上の白ロゴ・白三本線を明るい背景でも判読できるよう、上端に薄い暗スクリムを重ねる。
   over-hero のときだけ（スクロールで白背景に切り替わると自動的に消える）。 */
.site-header.over-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.28), rgba(0,0,0,0));
  pointer-events: none;          /* クリックを邪魔しない */
  z-index: -1;                   /* ヘッダー内で背面（ロゴ・三本線の後ろ） */
}
.site-header.over-hero .header-logo,
.site-header.over-hero .site-nav a,
.site-header.over-hero .nav-cta { color: #fff !important; }
.site-header.over-hero .header-logo span { color: rgba(255,255,255,0.7); }
.site-header.over-hero .site-nav a:hover,
.site-header.over-hero .nav-cta:hover { color: #fff !important; }
.site-header.over-hero .hamburger span { background: #fff; }
/* モバイル：メニュー展開時は白背景オーバーレイのため濃色を維持 */
.site-header.over-hero .site-nav.open a,
.site-header.over-hero .site-nav.open .nav-cta { color: var(--clr-text) !important; }

/* ===== モバイルメニュー開放中（html.nav-open） ===== */
/* 背後ページのスクロールを止める（クラスベースのスクロールロック） */
html.nav-open, html.nav-open body { overflow: hidden; }
/* 原因①: オーバーレイは .site-header 内にあり z-index が親の階層に閉じ込められるため、親ごと最前面へ
   原因②: backdrop-filter を持つ祖先は position:fixed 子孫の包含ブロックになり、ヘッダー枠にクリップする。
           メニューは全面を覆うので展開中はぼかし不要 → 解除してオーバーレイを画面いっぱいに広げる */
html.nav-open .site-header {
  z-index: 1000;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}
/* 不透明オーバーレイ上でロゴ・×を濃色に（over-hero の白指定を特異度＋!importantで上書き） */
html.nav-open .site-header .header-logo,
html.nav-open .site-header .header-logo span { color: var(--clr-text) !important; }
html.nav-open .site-header .hamburger span { background: var(--clr-text) !important; }

/* ヘッドコピー：軽やかに（Light 300）＋影を繊細に */
.hero .hero-brand-statement { font-weight: 300; text-shadow: 0 1px 18px rgba(0,0,0,0.3); }

/* eyebrow 罫線：細く・短く（テラコッタ維持） */
.hero .hero-eyebrow::before { width: 34px; height: 1px; margin-bottom: 1rem; }

/* キャプション：繊細に（小さく・字間広め・白80%） */
.hero .hero-image-caption { font-size: 0.6875rem; letter-spacing: 0.08em; color: rgba(255,255,255,0.8); }

/* 画像トーン：暖色照明をわずかに鎮める */
.hero .hero-slide img { filter: saturate(0.9) brightness(0.97); }

/* 技術資料CTA：大胆に・横長・矢印付き */
.hero .btn-primary { padding: 1.15rem 2.6rem; font-size: 1.0625rem; border-radius: 5px; letter-spacing: 0.03em; }
.hero .btn-primary .btn-arrow { margin-left: 0.35rem; transition: transform 0.25s ease; }
.hero .btn-primary:hover .btn-arrow { transform: translateX(5px); }
.hero .btn-secondary { padding: 1.15rem 2rem; border-radius: 5px; }

/* =========================================
   ②〜⑥ セクション仕上げ＋フッター
   ========================================= */
.why-header, .cert-header, .teaser-header, .news-header { margin-bottom: clamp(2rem, 4vw, 3rem); }
.why-header .section-title, .cert-header .section-title, .teaser-header .section-title, .news-header .section-title { margin-top: 0.5rem; }
.why-intro { color: var(--color-text-secondary); margin-top: 0.75rem; }

/* ② Why：Hero世界観を踏襲（白背景・余白区切り・テラコッタ統一・番号マーカー） */
.why-section { background: var(--clr-bg); color: var(--color-text-primary); padding-block: clamp(4.5rem, 9vw, 7.5rem); }
.why-section .section-eyebrow { color: var(--color-accent); }
.why-header { max-width: 42rem; margin-bottom: clamp(2.75rem, 5vw, 4.5rem); }
.why-heading { font-family: var(--font-serif); font-size: clamp(1.5rem, 3vw, 2.125rem); font-weight: 300; line-height: 1.45; letter-spacing: 0.02em; color: var(--color-text-primary); margin-top: 1.25rem; word-break: keep-all; overflow-wrap: anywhere; }
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; background: none; border: none; border-radius: 0; overflow: visible; }
.why-card { background: none; box-shadow: none; border: none; border-radius: 0; border-left: 1px solid var(--clr-border); padding: 0 clamp(0.875rem, 1.4vw, 1.375rem); transition: none; }
.why-card:first-child { border-left: none; padding-left: 0; }
.why-card:hover { background: none; }
.why-num { display: block; font-size: 0.8125rem; font-weight: 700; letter-spacing: 0.12em; color: var(--color-accent); margin-bottom: 0.85rem; }
.why-visual { display: block; aspect-ratio: 4 / 3; overflow: hidden; background: var(--clr-bg-alt); margin-bottom: 1.2rem; }
.why-visual img { width: 100%; height: 100%; object-fit: cover; display: block; }
.why-visual--logo { display: flex; align-items: center; justify-content: center; background: #f5f4f2; }
.why-visual--logo img { width: auto; height: 58%; object-fit: contain; }
.why-card-title { font-family: var(--font-serif); font-size: 1.1875rem; font-weight: 500; line-height: 1.5; margin-bottom: 0.6rem; color: var(--color-text-primary); word-break: keep-all; overflow-wrap: anywhere; }
.why-card-lead { font-size: 0.875rem; font-weight: 500; color: var(--color-text-primary); margin-bottom: 1.1rem; word-break: keep-all; overflow-wrap: anywhere; }
.why-card-points { display: flex; flex-direction: column; gap: 0.55rem; }
.why-card-points li { font-size: 0.8125rem; line-height: 1.75; color: var(--color-text-secondary); word-break: keep-all; overflow-wrap: anywhere; }
/* キー数値・認証番号を主役に */
.why-stat { margin-top: 0.25rem; }
.why-stat-value { font-family: var(--font-sans); font-size: clamp(2rem, 3vw, 2.5rem); font-weight: 700; line-height: 1.2; letter-spacing: 0.005em; color: var(--color-accent); word-break: keep-all; overflow-wrap: anywhere; }
.why-stat-value--code { font-size: clamp(1.125rem, 1.7vw, 1.375rem); letter-spacing: 0.01em; }
.why-stat-unit { display: block; font-family: var(--font-sans); font-size: 0.8125rem; font-weight: 400; color: #666; letter-spacing: 0.02em; margin-top: 0.25rem; }
.why-stat-label { font-size: 0.9375rem; font-weight: 500; color: #444; margin-top: 0.4rem; }
.why-stat-rule { display: block; width: 28px; height: 1px; background: #e5e5e5; margin: 1.1rem 0; }
.why-stat-note { font-size: 0.85rem; color: #666; line-height: 1.6; }
.why-stat-sub { font-size: 0.75rem; color: #999; line-height: 1.6; margin-top: 0.35rem; }

/* ③ 認証・適合：Why流（罫線なし・余白区切り・認証番号を主役に） */
.cert-section { background: #f5f4f2; padding-block: clamp(4rem, 8vw, 6.5rem); border-top: 1px solid var(--clr-border); border-bottom: 1px solid var(--clr-border); }
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(2rem, 4vw, 3.5rem); }
.cert-card { display: block; border: none; padding-top: 0; }
.cert-kicker { display: block; font-size: 0.6875rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-accent); margin-bottom: 0.85rem; }
.cert-name { font-family: var(--font-serif); font-size: 1.1875rem; font-weight: 500; line-height: 1.5; color: var(--color-text-primary); margin-bottom: 0.75rem; word-break: keep-all; overflow-wrap: anywhere; }
.cert-value { font-family: var(--font-sans); font-size: clamp(2rem, 3vw, 2.5rem); font-weight: 700; line-height: 1.2; letter-spacing: 0.005em; color: var(--color-accent); word-break: keep-all; overflow-wrap: anywhere; }
.cert-value--code { font-size: clamp(1.0625rem, 1.5vw, 1.25rem); letter-spacing: 0.01em; }
.cert-value--standards { font-size: clamp(1.125rem, 1.7vw, 1.4375rem); letter-spacing: 0.01em; }
.cert-rule { display: block; width: 28px; height: 1px; background: #d8d3cc; margin: 1rem 0; }
.cert-note { font-size: 0.85rem; color: #666; line-height: 1.7; word-break: keep-all; overflow-wrap: anywhere; }

/* ④ 写真ティーザー */
.teaser-section { padding-block: clamp(3.5rem, 6vw, 5.5rem); }
.teaser-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(1.25rem, 2.5vw, 2rem); }
.teaser-card { display: flex; flex-direction: column; }
.teaser-img { display: block; overflow: hidden; aspect-ratio: 4 / 3; background: var(--clr-bg-alt); margin-bottom: 1rem; }
.teaser-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.teaser-card:hover .teaser-img img { transform: scale(1.04); }
.teaser-title { font-family: var(--font-serif); font-size: 1.1875rem; font-weight: 500; margin-bottom: 0.35rem; color: var(--color-text-primary); }
.teaser-text { font-size: 0.8125rem; line-height: 1.7; color: var(--color-text-secondary); margin-bottom: 0.75rem; }
.teaser-card .card-link { margin-top: auto; color: var(--color-accent); font-size: 0.8125rem; font-weight: 500; }

/* ⑤ News：整然としたリスト */
.news-list { border-top: 1px solid var(--clr-border); }
.news-item { display: grid; grid-template-columns: 7rem 5.5rem 1fr 1.25rem; align-items: center; gap: 1.25rem; padding: 1.25rem 0; border-bottom: 1px solid var(--clr-border); transition: background 0.2s ease; }
.news-item:hover { background: var(--clr-bg-alt); }
.news-date { font-size: 0.8125rem; color: var(--color-text-secondary); letter-spacing: 0.04em; }
.news-tag { justify-self: start; font-size: 0.6875rem; font-weight: 600; letter-spacing: 0.08em; color: var(--color-accent); border: 1px solid var(--color-accent); border-radius: 2px; padding: 0.15rem 0.6rem; }
.news-title { font-size: 0.9375rem; color: var(--color-text-primary); }
.news-arrow { color: var(--color-accent); transition: transform 0.2s ease; justify-self: end; }
.news-item:hover .news-arrow { transform: translateX(4px); }
.news-more { margin-top: 1.75rem; }
.text-link { color: var(--color-accent); font-weight: 500; font-size: 0.875rem; }

/* ⑥ Contact：独立した最終導線 */
.contact-cta-section { background: var(--clr-bg-alt); padding-block: clamp(4rem, 8vw, 6.5rem); text-align: center; }
.contact-cta-section .section-eyebrow { display: inline-block; }
.contact-cta-section .section-eyebrow::before { left: 50%; transform: translateX(-50%); }
.contact-cta-title { font-family: var(--font-serif); font-size: clamp(2rem, 4vw, 3rem); font-weight: 400; letter-spacing: 0.02em; margin: 0.5rem 0 1rem; color: var(--color-text-primary); }
.contact-cta-lead { font-size: 1.0625rem; color: var(--color-text-secondary); margin-bottom: 2rem; }
.contact-cta-btn { padding: 1.15rem 2.75rem; font-size: 1.0625rem; border-radius: 5px; }
.btn-arrow { display: inline-block; transition: transform 0.25s ease; }
.contact-cta-btn:hover .btn-arrow { transform: translateX(5px); }

/* フッター：会社情報 */
.footer-company { margin-top: 2rem; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.1); font-size: 0.8125rem; line-height: 1.9; color: #909090; }
.footer-company-name { color: #fff; font-weight: 600; letter-spacing: 0.04em; margin-bottom: 0.25rem; }
.footer-company a { color: #b0b0b0; }
.footer-company a:hover { color: #fff; }

@media (max-width: 900px) {
  .cert-grid, .teaser-grid { grid-template-columns: 1fr 1fr; }
  .why-grid { grid-template-columns: 1fr; gap: 2.75rem; }
  .why-card { border-left: none; padding: 0; }
  .why-card:first-child { padding: 0; }
}
@media (max-width: 600px) {
  .cert-grid, .teaser-grid { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: auto 1fr; row-gap: 0.4rem; column-gap: 1rem; }
  .news-arrow { display: none; }
  .news-tag { grid-column: 2; }
}

/* =========================================
   フッター視認性強化（暗背景でWCAG AA準拠／加納ブランドをテラコッタで強調）
   ========================================= */
.site-footer { color: #cfcfcf; }
.footer-inner { border-bottom: 1px solid #4a4a4a; }
.footer-brand { color: #ffffff; }
.footer-tagline { color: #cccccc; }
.footer-nav a { color: #d6d6d6; }
.footer-nav a:hover { color: #ffffff; }
.footer-bottom { color: #9a9a9a; }
.footer-lang a { color: #aaaaaa; transition: color var(--transition); }
.footer-lang a:hover { color: var(--color-accent); }

/* 株式会社加納のブランド — 戦略的アンカー（テラコッタ罫線＋可読な明度） */
.footer-brands { border-top: 1px solid #4a4a4a; }
.footer-brands-label {
  position: relative;
  padding-top: 0.9rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: #f0f0f0;
  margin-bottom: 1.25rem;
}
.footer-brands-label::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--color-accent);
}
.footer-brands a { font-size: 0.9375rem; color: #e8e8e8; }
.footer-brands a:hover { color: var(--color-accent); }
.footer-brands a span { color: #9a9a9a; font-size: 0.7rem; }

/* 会社情報 — BtoB信頼資産 */
.footer-company { border-top: 1px solid #4a4a4a; color: #cccccc; }
.footer-company-name { color: #ffffff; }
.footer-company a { color: #cccccc; }
.footer-company a:hover { color: #ffffff; }