:root {
  --font-ja: "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  --font-en: "Marcellus", "Times New Roman", serif;
  --text: #222b2b;
  --muted: #687474;
  --line: #dce2e2;
  --deep: #707e7e;
  --bg: #f5f8f8;
  --white: #fff;
  --shadow: 0 24px 70px rgba(45, 60, 60, .13);
  --radius: 28px;
  --pc: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text);
  font-family: var(--font-ja);
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .045em;
  background: var(--bg);
}

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

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

.container {
  width: min(var(--pc), calc(100% - 48px));
  margin-inline: auto;
}

h1, h2, h3, p { margin-top: 0; }

h1, h2 {
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: .04em;
}

h2 {
  margin-bottom: 22px;
  font-size: clamp(32px, 4vw, 52px);
}

p { color: var(--muted); }

.eyebrow {
  margin-bottom: 12px;
  color: var(--deep);
  font-family: var(--font-en);
  font-size: 14px;
  letter-spacing: .18em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 260px;
  padding: 16px 36px;
  border-radius: 999px;
  color: #fff;
  font-weight: 700;
  background: linear-gradient(135deg, #7a8787, #bcc6c6);
  box-shadow: 0 18px 38px rgba(86, 98, 98, .28);
}

.btn::after {
  content: "›";
  margin-left: 16px;
  font-size: 28px;
  line-height: 1;
}

.section {
  padding: 96px 0;
  background: var(--white);
  overflow: hidden;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.image-card {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: #edf2f2;
  box-shadow: var(--shadow);
}

.image-card img {
  width: 100%;
  aspect-ratio: 16 / 11;
  object-fit: cover;
}

/* HERO：左右分割ではなく、背景画像の上にテキストを重ねる */
.hero {
  position: relative;
  min-height: 760px;
  display: grid;
  align-items: center;
  overflow: hidden;
  background: #edf2f2;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(255,255,255,.96) 0%, rgba(255,255,255,.84) 34%, rgba(255,255,255,.32) 64%, rgba(255,255,255,.06) 100%),
    linear-gradient(180deg, rgba(255,255,255,.15), rgba(232,238,238,.18));
}

.hero__inner {
  position: relative;
  z-index: 2;
  width: min(var(--pc), calc(100% - 48px));
  margin-inline: auto;
  padding: 92px 0 80px;
}

.brand {
  margin-bottom: 44px;
  color: var(--deep);
  font-family: var(--font-en);
  font-size: 22px;
  letter-spacing: .22em;
}

.hero__sub {
  margin-bottom: 14px;
  color: var(--deep);
  font-weight: 700;
  letter-spacing: .12em;
}

.hero h1 {
  margin-bottom: 26px;
  font-size: clamp(44px, 6vw, 76px);
}

.hero__lead {
  max-width: 590px;
  margin-bottom: 30px;
  font-size: 18px;
}

.hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 34px;
  padding: 0;
  list-style: none;
}

.hero__badges li {
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255,255,255,.72);
  backdrop-filter: blur(6px);
  color: #4d5858;
  font-size: 13px;
  font-weight: 700;
}

.intro {
  background: linear-gradient(135deg, #f8fbfb, #e8eeee);
}

.exosome {
  background: linear-gradient(180deg, #fff, #f1f5f5);
}

.icon-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 34px;
}

.icon-grid div {
  padding: 22px 12px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255,255,255,.78);
  text-align: center;
}

.icon-grid img {
  width: 64px;
  height: 64px;
  margin: 0 auto 10px;
  object-fit: contain;
}

.icon-grid span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.section-head {
  max-width: 720px;
  margin: 0 auto 46px;
  text-align: center;
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.step {
  padding: 14px 14px 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255,255,255,.82);
  box-shadow: 0 16px 42px rgba(80, 90, 90, .08);
}

.step img {
  width: 100%;
  aspect-ratio: 3 / 2;
  margin-bottom: 18px;
  border-radius: 16px;
  object-fit: cover;
}

.step small {
  display: block;
  color: #a6b0b0;
  font-weight: 700;
  letter-spacing: .14em;
}

.step h3 {
  margin: 5px 0 10px;
  font-size: 18px;
  line-height: 1.5;
}

.step p {
  margin-bottom: 0;
  font-size: 14px;
}

.glow {
  position: relative;
  min-height: 560px;
  display: grid;
  align-items: center;
  overflow: hidden;
  background: #f6f9f9;
}

.glow__bg,
.cta__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.glow__bg img,
.cta__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.glow::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(90deg, rgba(255,255,255,.94), rgba(255,255,255,.55), rgba(255,255,255,.12));
}

.glow__content {
  position: relative;
  z-index: 2;
  max-width: 460px;
}

.glow ul {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.glow li {
  margin-bottom: 8px;
}

.glow li::before {
  content: "✓";
  margin-right: 10px;
  color: var(--deep);
  font-weight: 700;
}

.before-after {
  position: absolute;
  right: max(24px, calc((100vw - var(--pc)) / 2));
  bottom: 64px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 18px;
}

.before-after figure {
  width: 160px;
  margin: 0;
}

.before-after img {
  border-radius: 12px;
  box-shadow: 0 10px 26px rgba(50, 60, 60, .16);
}

.before-after figcaption {
  margin-top: 6px;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

.before-after span {
  color: var(--deep);
  font-size: 30px;
}

.cta {
  position: relative;
  min-height: 450px;
  display: grid;
  align-items: center;
  overflow: hidden;
  background: #edf2f2;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(90deg, rgba(255,255,255,.94), rgba(255,255,255,.68), rgba(255,255,255,.2));
}

.cta__content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.footer {
  padding: 44px 0;
  background: #fff;
  color: var(--muted);
  font-size: 12px;
}

/* PC：769px以上 */
@media (min-width: 769px) {
  .pc-only { display: block; }
  .sp-only { display: none !important; }
}

/* SP：768px以下 */
@media (max-width: 768px) {
  .pc-only { display: none !important; }
  .sp-only { display: block; }

  .container {
    width: calc(100% - 32px);
  }

  .section {
    padding: 68px 0;
  }

  h2 {
    font-size: 32px;
  }

  .btn {
    width: 100%;
    min-width: 0;
  }

  .grid-2 {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .hero {
    min-height: 720px;
    align-items: end;
  }

  .hero__bg img {
    object-position: center top;
  }

  .hero::before {
    background:
      linear-gradient(180deg, rgba(255,255,255,.04) 0%, rgba(255,255,255,.16) 34%, rgba(255,255,255,.92) 68%, rgba(255,255,255,.98) 100%);
  }

  .hero__inner {
    width: calc(100% - 32px);
    padding: 360px 0 42px;
  }

  .brand {
    margin-bottom: 18px;
    font-size: 17px;
  }

  .hero__sub {
    font-size: 13px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .hero__lead {
    font-size: 15px;
  }

  .hero__badges {
    gap: 7px;
    margin-bottom: 24px;
  }

  .hero__badges li {
    width: calc(50% - 4px);
    padding: 9px 8px;
    text-align: center;
    font-size: 12px;
  }

  .icon-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .step-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .step {
    display: grid;
    grid-template-columns: 42% 1fr;
    gap: 14px;
    align-items: center;
    padding: 12px;
  }

  .step img {
    margin-bottom: 0;
  }

  .step h3 {
    font-size: 16px;
  }

  .step p {
    font-size: 13px;
  }

  .glow {
    min-height: 760px;
    align-items: start;
  }

  .glow__bg img {
    object-position: center bottom;
  }

  .glow::before {
    background: linear-gradient(180deg, rgba(255,255,255,.98) 0%, rgba(255,255,255,.9) 36%, rgba(255,255,255,.35) 74%, rgba(255,255,255,.12) 100%);
  }

  .glow__content {
    padding-top: 58px;
  }

  .before-after {
    left: 16px;
    right: 16px;
    bottom: 28px;
    justify-content: center;
    gap: 12px;
  }

  .before-after figure {
    width: 42%;
    max-width: 150px;
  }

  .cta {
    min-height: 520px;
    align-items: end;
  }

  .cta::before {
    background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.92) 58%, rgba(255,255,255,.98));
  }

  .cta__content {
    padding: 250px 0 44px;
  }
}