:root {
  --bg: #f5fbff;
  --white: #ffffff;
  --ice: #e8f6ff;
  --sky: #b9e4ff;
  --blue: #5daed8;
  --deep: #173246;
  --accent: #2b8fc2;
  --muted: #6d7f8c;
  --line: #d8edf8;
  --shadow: 0 24px 60px rgba(23, 50, 70, 0.10);
  --shadow-sm: 0 8px 24px rgba(23, 50, 70, 0.06);
  --radius: 28px;
  --radius-sm: 18px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0 }
html { scroll-behavior: smooth }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  color: var(--deep);
  background: linear-gradient(180deg, #ffffff 0%, var(--bg) 42%, #ffffff 100%);
  line-height: 1.75;
}

a { color: inherit; text-decoration: none; transition: opacity var(--transition) }
a:hover { opacity: 0.75 }
img { max-width: 100%; display: block }
ul { list-style: none }
h1, h2, h3, h4 { line-height: 1.25 }

.container { width: min(1120px, calc(100% - 40px)); margin: auto }

/* ========== HEADER ========== */
.header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.78);
  border-bottom: 1px solid rgba(216, 237, 248, 0.8);
}

.nav {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 76px; gap: 24px;
}

.logo {
  font-weight: 700; letter-spacing: 0.08em; font-size: 18px;
  flex-shrink: 0;
}
.logo span {
  display: block; font-size: 11px; color: var(--muted);
  letter-spacing: 0.18em; font-weight: 500;
}

.navlinks {
  display: flex; gap: 22px; align-items: center;
  font-size: 14px; color: #345468;
}
.navlinks a { opacity: 0.88; transition: opacity var(--transition) }
.navlinks a:hover { opacity: 1 }
.navlinks a.active { color: var(--accent); font-weight: 700; opacity: 1 }

.navlinks .cta {
  background: var(--deep); color: white;
  padding: 11px 20px; border-radius: 999px;
  box-shadow: 0 10px 30px rgba(23, 50, 70, 0.18);
  transition: transform var(--transition), box-shadow var(--transition);
}
.navlinks .cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 36px rgba(23, 50, 70, 0.24);
  opacity: 1;
}

/* ========== HERO (TOP) ========== */
.hero {
  position: relative; overflow: hidden;
  padding: 88px 0 72px;
}
.hero::before {
  content: ""; position: absolute;
  inset: -20% -10% auto auto;
  width: 520px; height: 520px;
  background: radial-gradient(circle, var(--sky), transparent 68%);
  opacity: 0.55; filter: blur(4px);
}
.hero::after {
  content: ""; position: absolute;
  left: -8%; bottom: -30%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, #d0f0ff, transparent 65%);
  opacity: 0.35; filter: blur(6px);
}

.hero-grid {
  display: grid; grid-template-columns: 1.08fr 0.92fr;
  gap: 56px; align-items: center; position: relative;
}

.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--blue); background: rgba(232, 246, 255, 0.82);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 8px 16px; font-size: 13px; font-weight: 700;
}

h1 {
  font-size: clamp(36px, 5.5vw, 68px);
  line-height: 1.1; margin: 22px 0;
  letter-spacing: 0.02em;
}

.lead {
  font-size: clamp(15px, 1.8vw, 18px);
  color: var(--muted); max-width: 680px;
}

.actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 34px }

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: 0 24px; border-radius: 999px;
  font-weight: 700; font-size: 15px;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(23, 50, 70, 0.12);
  opacity: 1;
}
.btn.primary { background: var(--deep); color: white; border-color: var(--deep) }
.btn.secondary { background: white; color: var(--deep) }
.btn.outline { background: transparent; color: var(--deep); border-color: var(--blue) }
.btn.lg { min-height: 58px; padding: 0 32px; font-size: 16px }

/* ========== VISUAL CARD (HERO) ========== */
.visual-card {
  min-height: 480px; border-radius: 42px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.86), rgba(232, 246, 255, 0.92));
  border: 1px solid var(--line); box-shadow: var(--shadow);
  padding: 30px; display: flex; flex-direction: column; justify-content: space-between;
}

.bottle {
  flex: 1; border-radius: 32px;
  background:
    radial-gradient(circle at 50% 30%, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.18) 30%, transparent 50%),
    linear-gradient(160deg, #dff4ff, #ffffff 48%, #bde8ff);
  border: 1px solid #d5edf8;
  display: flex; align-items: center; justify-content: center; text-align: center;
  color: #2b6b8e; font-weight: 800; letter-spacing: 0.12em;
  font-size: 20px; min-height: 280px;
}

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 16px }
.stat {
  background: white; border: 1px solid var(--line);
  border-radius: 20px; padding: 14px; text-align: center;
}
.stat strong { display: block; font-size: 22px; color: var(--deep); line-height: 1.2 }
.stat span { font-size: 12px; color: var(--muted) }

/* ========== SECTIONS ========== */
.section { padding: 76px 0 }
.section.alt { background: linear-gradient(180deg, var(--ice) 0%, var(--bg) 100%) }

.section-head {
  display: flex; justify-content: space-between;
  gap: 36px; align-items: end; margin-bottom: 40px;
}
.section-head.center { justify-content: center; text-align: center; flex-direction: column; align-items: center }

.section h2 {
  font-size: clamp(26px, 3.8vw, 42px);
  line-height: 1.2;
}
.section p.sub {
  color: var(--muted); max-width: 560px;
}

/* ========== CARDS ========== */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px }

.card {
  background: white; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.card .num { color: var(--blue); font-weight: 800; margin-bottom: 12px; font-size: 14px }
.card h3 { font-size: 20px; margin-bottom: 10px }
.card p { color: var(--muted); font-size: 15px }
.card .card-arrow {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--accent); font-size: 13px; font-weight: 700;
  margin-top: 16px;
}

/* ========== SPLIT LAYOUT ========== */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 24px }

.feature {
  background: linear-gradient(145deg, #fff, #eef9ff);
  border: 1px solid var(--line); border-radius: 32px; padding: 36px;
}
.feature h2 { font-size: 24px; margin-bottom: 14px }
.feature h3 { font-size: 18px; margin-bottom: 10px; color: var(--accent) }
.feature p { color: var(--muted); font-size: 15px }
.feature ul { padding-left: 1.2em; color: var(--muted) }
.feature ul li { margin-bottom: 6px; position: relative; padding-left: 20px; list-style: none }
.feature ul li::before {
  content: ""; position: absolute; left: 0; top: 10px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--sky);
}

/* ========== ICON CARDS (CONCEPT) ========== */
.icon-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px }
.icon-card {
  text-align: center; padding: 36px 24px;
  background: white; border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
}
.icon-card .icon {
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--ice); border: 1px solid var(--line);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 28px; margin-bottom: 18px;
}
.icon-card h3 { font-size: 18px; margin-bottom: 8px }
.icon-card p { color: var(--muted); font-size: 14px }

/* ========== EVIDENCE / TRUST ========== */
.evidence-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px }
.evidence-item {
  background: white; border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 24px;
  box-shadow: var(--shadow-sm);
}
.evidence-item h4 {
  font-size: 16px; margin-bottom: 8px; color: var(--deep);
  display: flex; align-items: center; gap: 8px;
}
.evidence-item p { color: var(--muted); font-size: 14px }

/* ========== PRODUCT PAGES ========== */
.page-hero {
  padding: 72px 0 42px;
  background: linear-gradient(180deg, #eef9ff, rgba(255, 255, 255, 0));
}
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 18px }
.breadcrumb a { color: var(--accent) }

.product-grid {
  display: grid; grid-template-columns: 0.9fr 1.1fr;
  gap: 28px; align-items: start;
}
.product-image {
  min-height: 360px; border-radius: 36px;
  background: linear-gradient(145deg, #e3f6ff, #fff);
  border: 1px solid var(--line); box-shadow: var(--shadow);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; color: #2b6b8e; letter-spacing: 0.08em;
  text-align: center; font-size: 18px;
  overflow: hidden;
}
.product-image img {
  width: 100%; height: 100%; object-fit: contain;
  min-height: 360px; border-radius: 36px;
  background: linear-gradient(145deg, #e3f6ff, #fff);
  padding: 12px;
}

.section-img {
  width: 100%; border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm);
}
.section-img img {
  width: 100%; height: 100%; object-fit: cover; display: block;
}

.hero-img {
  border-radius: 42px; overflow: hidden;
  box-shadow: var(--shadow);
}
.hero-img img {
  width: 100%; height: 100%; object-fit: contain; display: block;
  min-height: 400px;
  background: linear-gradient(145deg, rgba(232,246,255,0.5), rgba(255,255,255,0.8));
  padding: 16px;
}

/* ========== FORM BOX / SPECS ========== */
.form-box {
  background: white; border: 1px solid var(--line);
  border-radius: 34px; padding: 36px;
  box-shadow: var(--shadow);
}
.form-box h2 { font-size: 24px; margin-bottom: 20px }

.specs { display: grid; gap: 0 }
.spec {
  display: flex; justify-content: space-between; gap: 20px;
  padding: 16px 0; border-bottom: 1px solid var(--line);
}
.spec:last-child { border-bottom: none }
.spec span:first-child { font-weight: 700; flex-shrink: 0; min-width: 120px }
.spec span:last-child { color: var(--muted); text-align: right }

/* ========== LINEUP CARDS ========== */
.lineup-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px }
.lineup-item {
  text-align: center; padding: 28px 16px;
  background: white; border: 1px solid var(--line);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-sm);
  transition: transform var(--transition);
}
.lineup-item:hover { transform: translateY(-3px) }
.lineup-item .vol { font-size: 28px; font-weight: 800; color: var(--deep); margin-bottom: 4px }
.lineup-item .use { font-size: 13px; color: var(--muted) }

/* ========== USE-CASE GRID ========== */
.usecase-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px }
.usecase {
  display: flex; align-items: center; gap: 16px;
  padding: 20px; background: white;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}
.usecase .usecase-icon {
  width: 48px; height: 48px; border-radius: 14px;
  background: var(--ice); border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; flex-shrink: 0;
}
.usecase h4 { font-size: 15px; margin-bottom: 2px }
.usecase p { font-size: 13px; color: var(--muted) }

/* ========== FORM ========== */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px }
label { font-weight: 700; font-size: 13px; display: block }
input, select, textarea {
  width: 100%; margin-top: 8px;
  border: 1px solid var(--line); border-radius: 16px;
  padding: 14px 16px; font: inherit; font-size: 15px;
  background: #fbfeff;
  transition: border-color var(--transition), box-shadow var(--transition);
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(93, 174, 216, 0.15);
}
textarea { min-height: 140px; resize: vertical }
.full { grid-column: 1 / -1 }

/* ========== COMPANY TABLE ========== */
.company-table {
  width: 100%; border-collapse: collapse;
}
.company-table tr { border-bottom: 1px solid var(--line) }
.company-table tr:last-child { border-bottom: none }
.company-table th {
  text-align: left; padding: 16px 20px 16px 0;
  font-weight: 700; font-size: 14px;
  white-space: nowrap; vertical-align: top;
  width: 140px; color: var(--deep);
}
.company-table td {
  padding: 16px 0; font-size: 15px; color: var(--muted);
}

/* ========== CTA BANNER ========== */
.cta-banner {
  text-align: center; padding: 60px 20px;
  background: linear-gradient(145deg, var(--deep), #1e4a66);
  border-radius: 36px; color: white;
}
.cta-banner h2 { font-size: clamp(24px, 3.5vw, 36px); margin-bottom: 12px; color: white }
.cta-banner p { color: rgba(255, 255, 255, 0.7); margin-bottom: 28px; font-size: 16px }
.cta-banner .btn.primary {
  background: white; color: var(--deep); border-color: white;
}

/* ========== FOOTER ========== */
.footer {
  padding: 48px 0; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 13px;
}
.footer-grid {
  display: grid; grid-template-columns: 1fr auto;
  gap: 40px; align-items: start;
}
.footer-brand { font-weight: 700; font-size: 16px; color: var(--deep); margin-bottom: 8px; letter-spacing: 0.08em }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; font-size: 13px }
.footer-links a:hover { color: var(--accent) }
.footer-copy { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line) }

/* ========== BADGE ========== */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--ice); border: 1px solid var(--line);
  border-radius: 999px; padding: 6px 14px;
  font-size: 12px; font-weight: 700; color: var(--accent);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 860px) {
  .nav { align-items: flex-start; padding: 14px 0; flex-direction: column }
  .navlinks {
    width: 100%; overflow-x: auto; padding-bottom: 6px;
    gap: 14px; white-space: nowrap;
  }
  .hero { padding: 54px 0 }
  .hero-grid, .split, .product-grid { grid-template-columns: 1fr; gap: 28px }
  .visual-card { min-height: auto }
  .cards, .icon-cards { grid-template-columns: 1fr }
  .evidence-grid, .usecase-grid { grid-template-columns: 1fr }
  .lineup-grid { grid-template-columns: repeat(2, 1fr) }
  .section-head { display: block }
  .section p.sub { margin-top: 14px }
  .form-grid { grid-template-columns: 1fr }
  h1 { font-size: 38px }
  .container { width: min(100% - 28px, 1120px) }
  .footer-grid { grid-template-columns: 1fr }
  .cta-banner { border-radius: 24px; padding: 40px 16px }
}

@media (max-width: 480px) {
  .lineup-grid { grid-template-columns: 1fr }
  h1 { font-size: 32px }
  .hero { padding: 40px 0 }
  .section { padding: 52px 0 }
}