:root {
  --color-bg: #f7fbff;
  --color-white: #ffffff;
  --color-text: #1f2a37;
  --color-subtext: #5b6b7f;
  --color-line: rgba(120, 160, 210, 0.2);
  --color-primary: #5aa9e6;
  --color-primary-dark: #2f7fc1;
  --color-secondary: #eaf5ff;
  --color-section: #f4f9fe;
  --shadow-soft: 0 18px 40px rgba(72, 130, 190, 0.12);
  --shadow-card: 0 12px 28px rgba(70, 120, 180, 0.08);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1200px;
}


* {
  box-sizing: border-box;
}


html {
  scroll-behavior: smooth;
}


body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  color: var(--color-text);
  background:
    radial-gradient(circle at top right, rgba(140, 210, 255, 0.22), transparent 28%),
    linear-gradient(180deg, #fafdff 0%, #f7fbff 100%);
  line-height: 1.8;
}


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


a {
  color: var(--color-primary-dark);
  text-decoration: none;
}


a:hover {
  opacity: 0.9;
}


.container {
  width: min(100% - 40px, var(--max-width));
  margin: 0 auto;
}


.narrow {
  width: min(100% - 40px, 860px);
  margin: 0 auto;
}


.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.78);
  border-bottom: 1px solid rgba(120, 160, 210, 0.12);
}


.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 78px;
}


.logo {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-text);
}


.logo img {
  height: 36px;
  width: auto;
  display: block;
}


.nav ul {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}


.nav a {
  font-size: 0.95rem;
  color: var(--color-text);
  position: relative;
}


.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}


.nav a:hover::after {
  transform: scaleX(1);
}


.hero {
  padding: 120px 0 90px;
  overflow: hidden;
  background:
    linear-gradient(
      rgba(240, 248, 255, 0.85),
      rgba(255, 255, 255, 0.9)
    ),
    url("hero-bg.jpg") center / cover no-repeat;
}


.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}


.hero-sub-en {
  margin: 0 0 18px;
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary-dark);
  font-weight: 600;
}


.hero h1 {
  margin: 0 0 22px;
  font-size: clamp(2.4rem, 5vw, 4.3rem);
  line-height: 1.2;
  letter-spacing: 0.04em;
}


.hero-description {
  margin: 0;
  font-size: 1.05rem;
  color: var(--color-subtext);
  max-width: 680px;
}


.hero-buttons {
  display: flex;
  gap: 16px;
  margin-top: 34px;
  flex-wrap: wrap;
}


.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 180px;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}


.btn:hover {
  transform: translateY(-2px);
}


.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, #88c7f5 100%);
  color: #fff;
  box-shadow: var(--shadow-soft);
}


.btn-secondary {
  background: rgba(255, 255, 255, 0.76);
  color: var(--color-primary-dark);
  border: 1px solid rgba(120, 170, 220, 0.26);
}


.hero-visual {
  display: flex;
  justify-content: center;
}


.hero-card {
  width: min(100%, 380px);
  min-height: 340px;
  padding: 28px;
  border-radius: 28px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.88), rgba(228, 243, 255, 0.8));
  border: 1px solid rgba(130, 180, 225, 0.2);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 16px;
  align-content: center;
  position: relative;
}


.hero-card::before,
.hero-card::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(110, 190, 255, 0.18);
  filter: blur(18px);
}


.hero-card::before {
  width: 120px;
  height: 120px;
  top: 24px;
  right: 24px;
}


.hero-card::after {
  width: 150px;
  height: 150px;
  bottom: 18px;
  left: 18px;
}


.hero-card span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  width: fit-content;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--color-primary-dark);
  font-weight: 700;
  border: 1px solid rgba(140, 190, 230, 0.22);
}


.section {
  padding: 96px 0;
}


.section-alt {
  background: linear-gradient(180deg, rgba(244, 249, 254, 0.95), rgba(248, 252, 255, 0.95));
}


.section-heading {
  margin-bottom: 22px;
}


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


.section-label {
  margin: 0 0 10px;
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary-dark);
  font-weight: 700;
}


.section h2 {
  margin: 0;
  font-size: clamp(1.9rem, 3vw, 2.8rem);
  line-height: 1.35;
}


.lead,
.section-intro,
.contact-text,
.vision-text {
  color: var(--color-subtext);
  font-size: 1.03rem;
}


.grid {
  display: grid;
  gap: 24px;
  margin-top: 36px;
}


.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}


.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}


.card {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(135, 182, 224, 0.18);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-card);
}


.card h3 {
  margin: 0 0 12px;
  font-size: 1.12rem;
  line-height: 1.5;
}


.card p {
  margin: 0;
  color: var(--color-subtext);
  font-size: 0.98rem;
}


.issue-card,
.service-card,
.strength-card {
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}


.issue-card:hover,
.service-card:hover,
.strength-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 34px rgba(76, 128, 186, 0.12);
}


.scene-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}


.scene-item {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(135, 182, 224, 0.18);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  color: var(--color-text);
  box-shadow: var(--shadow-card);
}


.vision-section {
  background:
    linear-gradient(180deg, rgba(246, 251, 255, 0.96), rgba(237, 247, 255, 0.98));
}


.vision-text {
  text-align: center;
  margin: 0 0 18px;
}


.company-box {
  margin-top: 30px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(135, 182, 224, 0.18);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  box-shadow: var(--shadow-card);
}


.company-list {
  margin: 0;
}


.company-list > div {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(135, 182, 224, 0.18);
}


.company-list > div:last-child {
  border-bottom: none;
}


.company-list dt {
  font-weight: 700;
  color: var(--color-text);
}


.company-list dd {
  margin: 0;
  color: var(--color-subtext);
}


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


.contact-mail {
  display: inline-block;
  margin-top: 18px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  padding: 16px 24px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(135, 182, 224, 0.2);
  box-shadow: var(--shadow-card);
}


.site-footer {
  padding: 28px 0 36px;
  border-top: 1px solid rgba(120, 160, 210, 0.12);
  background: rgba(255, 255, 255, 0.72);
}


.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}


.footer-logo,
.footer-copy {
  margin: 0;
  color: var(--color-subtext);
}


.footer-logo {
  font-weight: 700;
  color: var(--color-text);
}


@media (max-width: 1024px) {
  .hero-inner,
  .grid-4 {
    grid-template-columns: 1fr;
  }


  .grid-2,
  .scene-list {
    grid-template-columns: 1fr;
  }


  .hero {
    padding-top: 96px;
  }


  .hero-visual {
    order: -1;
  }
}


@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    justify-content: center;
    gap: 14px;
    padding: 14px 0;
  }


  .nav ul {
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px 18px;
  }


  .section {
    padding: 72px 0;
  }


  .hero h1 {
    font-size: 2.3rem;
  }


  .hero-description,
  .lead,
  .section-intro,
  .vision-text,
  .contact-text {
    font-size: 0.98rem;
  }


  .company-list > div {
    grid-template-columns: 1fr;
    gap: 8px;
  }


  .btn {
    width: 100%;
  }


  .hero-buttons {
    flex-direction: column;
  }
}