:root {
  
  --c-bg:        #F5EFE3;
  --c-fg:        #1B2840;
  --c-muted:     #7A6858;
  --c-accent:    #1B4066;
  --c-accent-2:  #C8A96E;
  --c-surface:   #EDE5D5;
  --c-dark:      #1B2840;
  --c-dark-fg:   #F5EFE3;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 2rem;
  --space-5: 4rem;
  --space-6: 8rem;

  --radius-sm: 2px;
  --radius-md: 6px;
  --radius-lg: 14px;

  --font-display: 'Noto Serif JP', 'Georgia', serif;
  --font-body:    'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background-color: var(--c-bg);
  color: var(--c-fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.25;
  color: var(--c-fg);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); font-weight: 600; }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.5rem); font-weight: 600; }
h4 { font-size: 1.05rem; font-weight: 600; }

p { font-size: clamp(0.9rem, 1.5vw, 1.05rem); color: var(--c-muted); line-height: 1.75; }

.label {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-accent-2);
}

.container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.section {
  padding-block: var(--space-5);
}

.section--dark {
  background-color: var(--c-dark);
  color: var(--c-dark-fg);
}
.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 { color: var(--c-dark-fg); }
.section--dark p { color: rgba(245,239,227,0.72); }
.section--dark .label { color: var(--c-accent-2); }

.section--surface { background-color: var(--c-surface); }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }

.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

.text-center { text-align: center; }

.section-header { margin-bottom: var(--space-5); }
.section-header .label { display: block; margin-bottom: var(--space-2); }
.section-header p { max-width: 52ch; }
.section-header.text-center { text-align: center; }
.section-header.text-center h2 { margin-inline: auto; }
.section-header.text-center p { margin-inline: auto; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
  border: 2px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background-color: var(--c-accent);
  color: var(--c-dark-fg);
  border-color: var(--c-accent);
}
.btn-primary:hover { background-color: #163352; border-color: #163352; }

.btn-accent {
  background-color: var(--c-accent-2);
  color: var(--c-fg);
  border-color: var(--c-accent-2);
}
.btn-accent:hover { background-color: #b8963e; border-color: #b8963e; }

.btn-outline {
  background-color: transparent;
  color: var(--c-fg);
  border-color: var(--c-fg);
}
.btn-outline:hover { background-color: var(--c-fg); color: var(--c-dark-fg); }

.btn-outline-light {
  background-color: transparent;
  color: var(--c-dark-fg);
  border-color: var(--c-dark-fg);
}
.btn-outline-light:hover { background-color: var(--c-dark-fg); color: var(--c-fg); }

.img-placeholder {
  background-color: var(--c-surface);
  border: 1px solid rgba(27,40,64,0.12);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.img-placeholder::after {
  content: '';
  display: block;
  width: 40px;
  height: 40px;
  border: 2px solid var(--c-muted);
  border-radius: 50%;
  opacity: 0.35;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--c-bg);
  border-bottom: 1px solid rgba(27,40,64,0.1);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-block: var(--space-3);
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.site-header__logo img {
  width: 38px;
  height: 38px;
}

.site-header__brand {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--c-fg);
  letter-spacing: -0.01em;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 88vh;
}

.hero__content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-6) var(--space-5) var(--space-6) var(--space-4);
  background-color: var(--c-bg);
}

.hero__eyebrow {
  display: block;
  margin-bottom: var(--space-3);
}

.hero__title {
  margin-bottom: var(--space-4);
}

.hero__title span {
  display: block;
  color: var(--c-accent-2);
}

.hero__lead {
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  max-width: 48ch;
  margin-bottom: var(--space-4);
  color: var(--c-muted);
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.hero__image {
  background-color: var(--c-dark);
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: var(--space-4);
}

.hero__image .img-placeholder {
  position: absolute;
  inset: 0;
  border-radius: 0;
  border: none;
  background-color: rgba(27,64,102,0.35);
}

.hero__image-caption {
  position: relative;
  z-index: 10;
  color: rgba(245,239,227,0.8);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.intro__grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-5);
  align-items: center;
}

.intro__label-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.intro__tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background-color: var(--c-surface);
  border-left: 3px solid var(--c-accent-2);
  font-size: 0.85rem;
  color: var(--c-fg);
}

.techniques__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.technique-card {
  padding: var(--space-4);
  background-color: var(--c-bg);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 18px rgba(27,40,64,0.08);
}

.technique-card__img {
  width: 100%;
  aspect-ratio: 4/3;
  margin-bottom: var(--space-3);
}

.technique-card__kana {
  font-size: 2.2rem;
  font-family: var(--font-display);
  color: var(--c-accent-2);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.technique-card h3 { margin-bottom: var(--space-2); }

.steps__list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  position: relative;
}

.steps__list::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 10%;
  width: 80%;
  height: 1px;
  background-color: rgba(245,239,227,0.2);
  z-index: 0;
}

.step {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.step__num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--c-accent-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-accent-2);
  background-color: var(--c-dark);
  margin-bottom: var(--space-2);
}

.products__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.product-card {
  background-color: var(--c-bg);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 18px rgba(27,40,64,0.08);
  overflow: hidden;
}

.product-card__img {
  width: 100%;
  aspect-ratio: 1/1;
}

.product-card__body {
  padding: var(--space-3) var(--space-4) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.product-card__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-2);
}

.product-card__price {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-fg);
}

.product-card__price span {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--c-muted);
}

.capabilities__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.capability-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border-top: 2px solid var(--c-accent-2);
}

.capability-item__icon {
  width: 40px;
  height: 40px;
  color: var(--c-accent-2);
}

.benefits__split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.benefits__visual {
  aspect-ratio: auto;
  min-height: 480px;
}

.benefits__content {
  padding: var(--space-5) var(--space-5);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-4);
}

.benefit-row {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.benefit-row__num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--c-accent-2);
  line-height: 1;
  min-width: 2ch;
}

.showcase__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: var(--space-3);
}

.showcase-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.showcase-item--large {
  grid-row: span 2;
}

.showcase-item__img {
  width: 100%;
  height: 100%;
  min-height: 220px;
}

.showcase-item__label {
  position: absolute;
  bottom: var(--space-3);
  left: var(--space-3);
  background-color: rgba(27,40,64,0.85);
  color: var(--c-dark-fg);
  padding: var(--space-1) var(--space-3);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
}

.metrics__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  text-align: center;
}

.metric-item__number {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 700;
  color: var(--c-accent-2);
  line-height: 1;
  display: block;
}

.metric-item__label {
  font-size: 0.88rem;
  color: rgba(245,239,227,0.7);
  margin-top: var(--space-1);
  display: block;
}

.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.testimonial-card {
  padding: var(--space-4);
  background-color: var(--c-bg);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 18px rgba(27,40,64,0.08);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.testimonial-card__quote {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--c-fg);
  line-height: 1.7;
}

.testimonial-card__quote::before {
  content: '「';
  color: var(--c-accent-2);
  font-size: 1.5em;
  vertical-align: -0.25em;
  line-height: 0;
}

.testimonial-card__quote::after {
  content: '」';
  color: var(--c-accent-2);
  font-size: 1.5em;
  vertical-align: -0.25em;
  line-height: 0;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.testimonial-card__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--c-surface);
  border: 1px solid rgba(27,40,64,0.12);
  flex-shrink: 0;
}

.testimonial-card__name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--c-fg);
}

.testimonial-card__role {
  font-size: 0.78rem;
  color: var(--c-muted);
}

.faq__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 780px;
  margin-inline: auto;
}

.faq-item {
  border-bottom: 1px solid rgba(27,40,64,0.12);
  padding-bottom: var(--space-3);
}

.faq-item__q {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--c-fg);
  margin-bottom: var(--space-2);
  display: flex;
  gap: var(--space-2);
}

.faq-item__q::before {
  content: 'Q.';
  color: var(--c-accent-2);
  flex-shrink: 0;
}

.faq-item__a {
  padding-left: 2rem;
  font-size: 0.95rem;
  color: var(--c-muted);
  line-height: 1.75;
}

.blog__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.blog-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.blog-card__img {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius-md);
}

.blog-card__date {
  font-size: 0.78rem;
  color: var(--c-muted);
  letter-spacing: 0.04em;
}

.blog-card__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--c-fg);
  line-height: 1.5;
}

.blog-card__excerpt { font-size: 0.88rem; }

.blog-card__link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-accent);
  border-bottom: 1px solid currentColor;
  display: inline-block;
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-5);
  align-items: start;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact__info-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.contact__info-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent-2);
}

.contact__info-value {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--c-fg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form-field label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--c-fg);
  letter-spacing: 0.04em;
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: 0.7rem 1rem;
  border: 1px solid rgba(27,40,64,0.2);
  border-radius: var(--radius-sm);
  background-color: var(--c-bg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--c-fg);
  outline: none;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(27,64,102,0.12);
}

.form-field textarea { resize: vertical; min-height: 130px; }

.site-footer {
  background-color: var(--c-dark);
  color: var(--c-dark-fg);
  padding-block: var(--space-5);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid rgba(245,239,227,0.12);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__logo-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer__logo-row img { width: 34px; height: 34px; }

.footer__brand-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-dark-fg);
}

.footer__tagline {
  font-size: 0.88rem;
  color: rgba(245,239,227,0.6);
  line-height: 1.7;
}

.footer__col h4 {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-accent-2);
  margin-bottom: var(--space-3);
}

.footer__col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__col ul li a {
  font-size: 0.88rem;
  color: rgba(245,239,227,0.65);
}

.footer__col ul li a:hover { color: var(--c-dark-fg); }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-3);
  flex-wrap: wrap;
  gap: var(--space-2);
}

.footer__copyright {
  font-size: 0.8rem;
  color: rgba(245,239,227,0.45);
}

.footer__legal {
  display: flex;
  gap: var(--space-3);
}

.footer__legal a {
  font-size: 0.8rem;
  color: rgba(245,239,227,0.45);
}

.footer__legal a:hover { color: var(--c-dark-fg); }

.divider {
  width: 48px;
  height: 2px;
  background-color: var(--c-accent-2);
  margin-block: var(--space-3);
}

@media (min-width: 641px) and (max-width: 1024px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero__content { padding: var(--space-5) var(--space-4); }
  .hero__image { min-height: 380px; }

  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }

  .techniques__grid { grid-template-columns: repeat(2, 1fr); }
  .steps__list { grid-template-columns: repeat(2, 1fr); }
  .steps__list::before { display: none; }
  .products__grid { grid-template-columns: repeat(2, 1fr); }
  .capabilities__grid { grid-template-columns: repeat(2, 1fr); }
  .metrics__grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials__grid { grid-template-columns: repeat(2, 1fr); }
  .blog__grid { grid-template-columns: repeat(2, 1fr); }
  .contact__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .showcase__grid { grid-template-columns: 1fr 1fr; }
  .showcase-item--large { grid-row: auto; }
  .benefits__split { grid-template-columns: 1fr; }
  .benefits__visual { min-height: 280px; }
  .intro__grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  :root {
    --space-5: 2.5rem;
    --space-6: 3.5rem;
  }

  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero__content { padding: var(--space-5) var(--space-3); }
  .hero__image { min-height: 280px; }

  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: 1fr; }

  .techniques__grid { grid-template-columns: 1fr; }
  .steps__list { grid-template-columns: 1fr; }
  .steps__list::before { display: none; }
  .products__grid { grid-template-columns: 1fr; }
  .capabilities__grid { grid-template-columns: 1fr; }
  .metrics__grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials__grid { grid-template-columns: 1fr; }
  .blog__grid { grid-template-columns: 1fr; }
  .contact__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .showcase__grid { grid-template-columns: 1fr; }
  .showcase-item--large { grid-row: auto; }
  .benefits__split { grid-template-columns: 1fr; }
  .benefits__visual { min-height: 220px; }
  .intro__grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
}

.product-card img,
.showcase-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* wh-img-fill */
.product-card img,
.showcase-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}