:root {
  --bg: #091425;
  --bg-soft: #10203b;
  --panel: rgba(8, 20, 42, 0.78);
  --panel-strong: rgba(12, 28, 56, 0.92);
  --text: #edf6ff;
  --muted: #bfd0e8;
  --line: rgba(196, 220, 255, 0.12);
  --accent: #59d5ff;
  --accent-deep: #a7ecff;
  --accent-soft: rgba(89, 213, 255, 0.14);
  --shadow: 0 24px 60px rgba(2, 8, 20, 0.36);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(89, 213, 255, 0.18), transparent 26%),
    radial-gradient(circle at 88% 16%, rgba(112, 229, 255, 0.12), transparent 22%),
    linear-gradient(180deg, #07111f 0%, #0b1730 42%, #08101d 100%);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.5;
  pointer-events: none;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 40px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 18px 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(6, 18, 38, 0.72);
  backdrop-filter: blur(14px);
  border-radius: 24px;
  position: sticky;
  top: 18px;
  z-index: 10;
  box-shadow: var(--shadow);
}

.brand-mark,
.brand-name,
.section-kicker,
.eyebrow,
.panel-label,
.service-index {
  margin: 0;
}

.brand-mark,
.eyebrow,
.section-kicker,
.panel-label,
.service-index {
  color: var(--accent-deep);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-family: "Outfit", sans-serif;
  font-size: 0.82rem;
}

.brand-name {
  margin-top: 4px;
  font-size: 1.1rem;
  font-weight: 800;
}

.site-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.94rem;
}

.site-nav a:hover,
.site-nav a:focus {
  color: #fff;
}

.hero,
.section,
.contact-card {
  border-radius: 32px;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 30px;
  padding: 44px;
  margin-top: 28px;
  overflow: hidden;
  position: relative;
}

.hero-copy,
.hero-visual {
  position: relative;
  z-index: 1;
}

.hero::before {
  content: "";
  position: absolute;
  inset: auto auto -160px -110px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(89, 213, 255, 0.18), transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 40%),
    radial-gradient(circle at 72% 32%, rgba(89, 213, 255, 0.11), transparent 24%);
  pointer-events: none;
}

.hero h1 {
  margin: 14px 0 18px;
  font-size: clamp(2.4rem, 5vw, 4.5rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.hero-logo {
  display: block;
  width: min(220px, 54%);
  margin-top: 16px;
  border-radius: 26px;
  box-shadow: 0 20px 48px rgba(4, 10, 24, 0.3);
}

.hero-text,
.intro-card p,
.feature-main-card p,
.point-card p,
.support-card p,
.notice-box p,
.contact-card p,
.visual-caption,
.mini-note p {
  color: var(--muted);
  line-height: 1.85;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.hero-badges span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #d8f6ff;
  font-weight: 700;
  font-size: 0.92rem;
}

.hero-actions,
.contact-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover,
.button:focus {
  transform: translateY(-1px);
  box-shadow: 0 12px 30px rgba(4, 10, 24, 0.28);
}

.button-primary {
  background: linear-gradient(135deg, #16b9f2, #7bddff);
  color: #08304f;
}

.button-secondary {
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.hero-symbols {
  position: absolute;
  inset: 10px 8px 10px auto;
  width: min(46%, 460px);
  pointer-events: none;
  opacity: 1;
  z-index: 0;
}

.shell-fan {
  position: absolute;
  top: -8px;
  right: -4px;
  width: 280px;
  height: 210px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 12px;
}

.shell-fan span {
  display: block;
  width: 28px;
  height: 182px;
  border-radius: 999px 999px 18px 18px;
  background: linear-gradient(180deg, rgba(233, 251, 255, 0.98), rgba(120, 226, 255, 0.4));
  transform-origin: center bottom;
  box-shadow:
    0 0 26px rgba(89, 213, 255, 0.22),
    0 0 56px rgba(89, 213, 255, 0.12);
}

.shell-fan span:nth-child(1) { transform: rotate(-44deg) translateY(16px); }
.shell-fan span:nth-child(2) { transform: rotate(-29deg) translateY(8px); }
.shell-fan span:nth-child(3) { transform: rotate(-15deg) translateY(3px); }
.shell-fan span:nth-child(4) { transform: rotate(0deg); }
.shell-fan span:nth-child(5) { transform: rotate(15deg) translateY(3px); }
.shell-fan span:nth-child(6) { transform: rotate(29deg) translateY(8px); }
.shell-fan span:nth-child(7) { transform: rotate(44deg) translateY(16px); }

.fuji-silhouette {
  position: absolute;
  right: 0;
  bottom: -8px;
  width: 360px;
  height: 230px;
  background:
    linear-gradient(180deg, rgba(246, 252, 255, 0.96) 0 20%, transparent 20%),
    linear-gradient(180deg, rgba(190, 241, 255, 0.28), rgba(17, 44, 81, 0));
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  border-radius: 18px;
  opacity: 0.62;
  filter:
    drop-shadow(0 14px 30px rgba(4, 10, 24, 0.32))
    drop-shadow(0 0 30px rgba(89, 213, 255, 0.14));
}

.hero-visual {
  display: grid;
  gap: 18px;
  align-content: start;
}

.visual-card,
.intro-card,
.feature-main-card,
.feature-side-card,
.support-card,
.notice-box,
.point-card {
  background: var(--panel-strong);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.visual-card {
  padding: 18px;
}

.product-image {
  display: block;
  width: 100%;
  margin: 0 auto;
  background: #fff;
  border-radius: 18px;
}

.product-image-large {
  max-width: 380px;
  padding: 12px;
}

.flyer-image {
  display: block;
  width: min(100%, 330px);
  margin: 0 auto 12px;
  border-radius: 18px;
  box-shadow: 0 16px 36px rgba(4, 10, 24, 0.22);
}

.visual-caption {
  margin: 0;
  font-size: 0.93rem;
}

.section {
  margin-top: 28px;
  padding: 38px;
}

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

.section-heading h2 {
  margin: 10px 0 0;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  line-height: 1.24;
}

.intro-grid,
.support-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.intro-card,
.support-card {
  padding: 24px;
}

.concept-table {
  margin-top: 22px;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
}

.concept-row {
  display: grid;
  grid-template-columns: 0.9fr 1.05fr 1.05fr;
}

.concept-row > div {
  padding: 18px 20px;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  line-height: 1.7;
}

.concept-row > div:last-child {
  border-right: none;
}

.concept-row:last-child > div {
  border-bottom: none;
}

.concept-head > div {
  background: rgba(89, 213, 255, 0.16);
  color: #f5fbff;
  font-weight: 800;
}

.concept-row > div:first-child {
  color: var(--accent-deep);
  font-weight: 700;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.video-card {
  padding: 18px;
  border-radius: 24px;
  background: var(--panel-strong);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.video-frame {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  border-radius: 18px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.04);
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-link {
  margin: 12px 4px 2px;
}

.video-link a {
  color: var(--accent-deep);
  font-weight: 700;
  text-decoration: underline;
}

.feature-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
}

.feature-main-card,
.feature-side-card {
  padding: 26px;
}

.lead {
  color: var(--text);
  font-size: 1.14rem;
  font-weight: 500;
}

.feature-points {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.point-card {
  padding: 18px 20px;
}

.point-card h4,
.intro-card h3,
.feature-main-card h3,
.support-card h3,
.feature-side-card h3,
.feature-side-card h4,
.use-case-card h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
}

.check-list {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--text);
  line-height: 1.9;
  font-weight: 500;
}

.mini-note {
  margin-top: 22px;
  padding: 16px 18px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(89, 213, 255, 0.12), rgba(255, 255, 255, 0.04));
}

.ingredient-card h3 {
  margin-top: 10px;
}

.sds-card {
  margin-top: 22px;
  padding: 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.sds-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: end;
  margin-bottom: 14px;
}

.sds-header h4,
.sds-header p {
  margin: 0;
}

.sds-header h4 {
  font-size: 1rem;
  color: #fff;
}

.sds-header p {
  color: var(--accent-deep);
  font-weight: 800;
}

.sds-table {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.sds-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
}

.sds-row > div {
  padding: 12px 10px;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  line-height: 1.6;
  font-size: 0.92rem;
}

.sds-row > div:last-child {
  border-right: none;
}

.sds-row:last-child > div {
  border-bottom: none;
}

.sds-head > div {
  background: rgba(89, 213, 255, 0.16);
  color: #f5fbff;
  font-weight: 800;
}

.sds-highlight {
  color: #ffd95e;
  font-weight: 800;
}

.cod-box {
  margin-top: 16px;
  padding: 16px 18px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(89, 213, 255, 0.08));
}

.cod-label {
  display: inline-block;
  color: var(--accent-deep);
  font-weight: 800;
  margin-bottom: 6px;
}

.cod-box strong {
  display: block;
  font-size: 2rem;
  line-height: 1.1;
  color: #fff;
}

.cod-box p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 0.92rem;
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.use-case-card {
  padding: 22px;
  border-radius: 22px;
  background: var(--panel-strong);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.use-case-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.notice-box {
  padding: 24px;
}

.column-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.column-card {
  padding: 24px;
  border-radius: 24px;
  background: var(--panel-strong);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.column-meta {
  margin: 0 0 10px;
  color: var(--accent-deep);
  font-family: "Outfit", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.84rem;
}

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

.column-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.text-link {
  display: inline-block;
  margin-top: 16px;
  color: var(--accent-deep);
  font-weight: 700;
  text-decoration: underline;
}

.article-shell {
  padding-top: 28px;
}

.back-link {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--accent-deep);
  font-weight: 700;
}

.article-page {
  padding: 38px;
  border-radius: 32px;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.article-page h1 {
  margin: 8px 0 18px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.2;
}

.article-lead {
  margin: 0 0 18px;
  font-size: 1.14rem;
  line-height: 1.9;
  color: #fff;
}

.article-hero-image {
  display: block;
  width: 100%;
  margin: 18px 0 24px;
  border-radius: 26px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 26px 60px rgba(2, 8, 20, 0.34);
  object-fit: cover;
}

.article-body p {
  margin: 0 0 16px;
  color: var(--muted);
  line-height: 1.9;
}

.contact-card {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  padding: 34px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
  padding: 0 8px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 980px) {
  .site-header,
  .hero,
  .feature-layout,
  .contact-card,
  .intro-grid,
  .support-grid,
  .video-grid,
  .use-cases-grid,
  .column-grid {
    grid-template-columns: 1fr;
  }

  .site-header {
    position: static;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(100% - 20px, 1180px);
    padding-top: 14px;
  }

  .site-header,
  .hero,
  .section,
  .contact-card {
    padding: 24px;
    border-radius: 24px;
  }

  .site-nav {
    gap: 12px 16px;
  }

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

  .concept-row {
    grid-template-columns: 1fr;
  }

  .concept-row > div {
    border-right: none;
  }

  .sds-row {
    grid-template-columns: 1fr;
  }

  .sds-row > div {
    border-right: none;
  }
}