/* ===== EXSTEM LP styles ===== */
:root {
  --bg: #FAF7F2;
  --bg-soft: #F2EDE3;
  --navy: #14213D;
  --navy-deep: #0E1A33;
  --gold: #C9A961;
  --gold-soft: #E2CE9F;
  --text: #1A1A1A;
  --text-sub: #5C5C5C;
  --text-mute: #8A8A8A;
  --line: #E5DFD3;
  --serif-en: "Cormorant Garamond", "Times New Roman", serif;
  --serif-ja: "Noto Serif JP", "游明朝", serif;
  --sans-ja: "Noto Sans JP", "Helvetica Neue", "Hiragino Kaku Gothic ProN", sans-serif;
  --max: 1120px;
  --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans-ja);
  font-weight: 400;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; margin: 0; }
button, input, select, textarea { font: inherit; }

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 110px 0;
  position: relative;
}

.section-eyebrow {
  font-family: var(--serif-en);
  font-size: 14px;
  letter-spacing: 0.4em;
  color: var(--gold);
  margin: 0 0 14px;
  text-transform: uppercase;
}
.section-eyebrow.gold { color: var(--gold-soft); }

.section-title {
  font-family: var(--serif-ja);
  font-weight: 600;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.5;
  margin: 0 0 32px;
  letter-spacing: 0.06em;
}
.section-title.light { color: #fff; }

.eyebrow {
  font-family: var(--serif-en);
  font-size: 13px;
  letter-spacing: 0.5em;
  color: var(--gold);
  margin: 0 0 20px;
}

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--serif-ja);
  font-weight: 500;
  letter-spacing: 0.12em;
  border-radius: 999px;
  transition: transform .25s ease, box-shadow .25s ease, opacity .25s ease;
  cursor: pointer;
  border: none;
}
.btn-navy {
  background: var(--navy);
  color: #fff;
  padding: 18px 44px;
  font-size: 16px;
  box-shadow: 0 8px 24px rgba(20, 33, 61, 0.25);
}
.btn-navy:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(20, 33, 61, 0.35); }

.btn-gold-sm {
  background: linear-gradient(135deg, #D8B872, #B89249);
  color: #fff;
  padding: 12px 24px;
  font-size: 13px;
}
.btn-gold-sm:hover { transform: translateY(-2px); }

.btn-gold-lg {
  background: linear-gradient(135deg, #E0C485, #B89249);
  color: #fff;
  padding: 22px 64px;
  font-size: 18px;
  box-shadow: 0 14px 30px rgba(184, 146, 73, 0.35);
}
.btn-gold-lg:hover { transform: translateY(-3px); box-shadow: 0 18px 38px rgba(184, 146, 73, 0.45); }

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
}
.brand img { height: 36px; }
.nav {
  margin-left: auto;
  display: flex;
  gap: 28px;
}
.nav a {
  font-size: 13px;
  color: var(--text-sub);
  letter-spacing: 0.1em;
  position: relative;
  transition: color .2s;
}
.nav a:hover { color: var(--navy); }
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width .25s;
}
.nav a:hover::after { width: 100%; }

@media (max-width: 900px) {
  .nav { display: none; }
}

/* ============ HERO ============ */
.hero {
  position: relative;
  padding: 100px 0 130px;
  background: linear-gradient(180deg, #FAF7F2 0%, #F4EEE2 100%);
  overflow: hidden;
}
.hero-bg-shape {
  position: absolute;
  pointer-events: none;
  z-index: 0;
}
.hero-bg-1 {
  top: -120px; right: -160px;
  width: 580px; height: 580px;
  background: radial-gradient(circle at 40% 40%, rgba(201, 169, 97, 0.18), rgba(201, 169, 97, 0) 70%);
  filter: blur(20px);
}
.hero-bg-2 {
  bottom: -200px; left: -180px;
  width: 540px; height: 540px;
  background: radial-gradient(circle at 60% 60%, rgba(20, 33, 61, 0.10), rgba(20, 33, 61, 0) 70%);
  filter: blur(20px);
}
.hero-deco-leaf {
  position: absolute;
  bottom: 60px;
  right: 8%;
  width: 130px;
  opacity: 0.7;
  z-index: 1;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-copy { max-width: 540px; }
.hero-title {
  font-family: var(--serif-ja);
  font-weight: 600;
  font-size: clamp(34px, 5.4vw, 56px);
  line-height: 1.4;
  letter-spacing: 0.08em;
  margin: 0 0 28px;
  color: var(--navy-deep);
}
.hero-lead {
  font-size: 15px;
  color: var(--text-sub);
  margin: 0 0 24px;
  letter-spacing: 0.06em;
}
.hero-product-name {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 28px 0 6px;
}
.hero-product-name img { height: 34px; }
.hero-product-name .ja {
  font-family: var(--serif-ja);
  font-size: 14px;
  color: var(--text-sub);
  letter-spacing: 0.4em;
}
.hero-tag {
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.3em;
  margin: 0 0 36px;
}

.hero-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 0 0 36px;
}
.hero-features li {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 16px 8px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--line);
  border-radius: 14px;
  font-size: 11px;
  letter-spacing: 0.05em;
}
.hero-features li img { width: 38px; height: 38px; object-fit: contain; margin-bottom: 6px; }
.hero-features li strong {
  font-size: 12px;
  font-weight: 600;
  color: var(--navy);
  display: block;
  margin-bottom: 2px;
  letter-spacing: 0.1em;
}
.hero-features li span { color: var(--text-mute); font-size: 10px; }

.hero-sub {
  text-align: center;
  font-size: 12px;
  color: var(--text-sub);
  letter-spacing: 0.2em;
  margin: 14px 0 0;
}

.hero-visual {
  position: relative;
  height: 540px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-visual-bg {
  position: absolute;
  inset: 30px;
  background:
    radial-gradient(circle at 30% 40%, rgba(255,255,255,0.9), rgba(255,255,255,0) 60%),
    radial-gradient(circle at 70% 60%, rgba(201, 169, 97, 0.18), rgba(201, 169, 97, 0) 65%),
    linear-gradient(135deg, #E8DDC4, #D8C5A1);
  border-radius: 50% 38% 55% 42% / 48% 55% 40% 50%;
  filter: blur(2px);
  animation: blob 14s ease-in-out infinite;
}
@keyframes blob {
  0%, 100% { border-radius: 50% 38% 55% 42% / 48% 55% 40% 50%; }
  50% { border-radius: 40% 55% 38% 50% / 55% 42% 50% 48%; }
}
.hero-product {
  position: relative;
  z-index: 2;
  max-height: 480px;
  width: auto;
  filter: drop-shadow(0 30px 50px rgba(20, 33, 61, 0.35));
}
.hero-badge {
  position: absolute;
  top: 50px;
  right: 30px;
  width: 130px;
  z-index: 3;
  filter: drop-shadow(0 8px 20px rgba(201, 169, 97, 0.3));
  animation: float 6s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@media (max-width: 880px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { height: 420px; }
}

/* ============ EFFECTS ============ */
.effects { background: var(--bg); }
.effects .section-title { text-align: center; }
.effects .section-eyebrow { text-align: center; }

.effects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 50px;
}
.effect-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 36px 28px 32px;
  border: 1px solid var(--line);
  text-align: center;
  position: relative;
  transition: transform .35s ease, box-shadow .35s ease;
}
.effect-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(20, 33, 61, 0.08);
}
.effect-num {
  font-family: var(--serif-en);
  font-size: 38px;
  color: var(--gold);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.effect-ja {
  font-family: var(--serif-ja);
  font-size: 22px;
  font-weight: 600;
  color: var(--navy);
  margin: 0 0 4px;
  letter-spacing: 0.1em;
}
.effect-en {
  font-family: var(--serif-en);
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--text-mute);
  margin: 0 0 22px;
}
.effect-photo {
  width: 160px;
  height: 160px;
  margin: 0 auto 22px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-soft);
  position: relative;
}
.effect-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.effect-desc {
  font-size: 13.5px;
  color: var(--text-sub);
  line-height: 1.85;
  margin: 0;
}

@media (max-width: 760px) {
  .effects-grid { grid-template-columns: 1fr; }
}

/* ============ EVIDENCE ============ */
.evidence {
  background: linear-gradient(135deg, var(--navy-deep) 0%, var(--navy) 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.evidence::before {
  content: "";
  position: absolute;
  top: -100px; right: -80px;
  width: 360px; height: 360px;
  border: 1px solid rgba(201, 169, 97, 0.15);
  border-radius: 50%;
}
.evidence::after {
  content: "";
  position: absolute;
  bottom: -120px; left: -100px;
  width: 280px; height: 280px;
  border: 1px solid rgba(201, 169, 97, 0.12);
  border-radius: 50%;
}
.evidence-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 60px;
  align-items: center;
}
.evidence-lead {
  font-size: 14px;
  color: rgba(255,255,255,0.78);
  letter-spacing: 0.06em;
  margin: 0 0 12px;
}
.evidence-note {
  font-size: 11px;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.1em;
  margin: 0;
}
.evidence-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.evidence-item {
  text-align: center;
}
.evidence-item img {
  width: 100%;
  max-width: 150px;
  margin: 0 auto 12px;
  filter: drop-shadow(0 6px 14px rgba(0,0,0,0.3));
}
.evidence-item p {
  font-size: 11px;
  color: rgba(255,255,255,0.78);
  letter-spacing: 0.05em;
  margin: 0;
  line-height: 1.6;
}

@media (max-width: 880px) {
  .evidence-inner { grid-template-columns: 1fr; gap: 40px; }
  .evidence-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============ INGREDIENT ============ */
.ingredient { background: var(--bg); }
.ingredient-inner {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 60px;
  align-items: center;
}
.ingredient-text {
  font-size: 14.5px;
  color: var(--text-sub);
  line-height: 2;
  margin: 0 0 32px;
}
.ingredient-points {
  display: grid;
  gap: 18px;
}
.ingredient-points li {
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 16px;
  align-items: center;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
}
.ingredient-points img {
  width: 50px;
  height: 50px;
  object-fit: contain;
}
.ingredient-points strong {
  display: block;
  font-family: var(--serif-ja);
  font-weight: 600;
  font-size: 15px;
  color: var(--navy);
  margin-bottom: 2px;
  letter-spacing: 0.06em;
}
.ingredient-points span {
  font-size: 12px;
  color: var(--text-mute);
}

.ingredient-visual {
  position: relative;
  display: flex;
  justify-content: center;
}
.ingredient-visual img {
  max-width: 460px;
  width: 100%;
  border-radius: 50% 40% 55% 38% / 45% 55% 40% 50%;
  filter: drop-shadow(0 24px 50px rgba(201, 169, 97, 0.25));
  animation: blob 16s ease-in-out infinite;
}

@media (max-width: 880px) {
  .ingredient-inner { grid-template-columns: 1fr; gap: 40px; }
}

/* ============ VOICE ============ */
.voice {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
}
.voice .section-eyebrow,
.voice .section-title { text-align: center; }
.voice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 50px;
}
.voice-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 28px 28px;
  border: 1px solid var(--line);
  position: relative;
}
.voice-card::before {
  content: "“";
  position: absolute;
  top: 8px;
  left: 22px;
  font-family: var(--serif-en);
  font-size: 70px;
  line-height: 1;
  color: var(--gold-soft);
  opacity: 0.5;
}
.voice-headline {
  font-family: var(--serif-ja);
  font-size: 18px;
  font-weight: 600;
  color: var(--navy);
  margin: 16px 0 16px;
  letter-spacing: 0.06em;
  line-height: 1.55;
  position: relative;
  z-index: 1;
}
.voice-body {
  font-size: 13.5px;
  color: var(--text-sub);
  line-height: 1.85;
  margin: 0 0 26px;
}
.voice-person {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}
.voice-person img {
  width: 48px; height: 48px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-soft);
}
.voice-person span {
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.1em;
}

@media (max-width: 760px) {
  .voice-grid { grid-template-columns: 1fr; }
}

/* ============ PRICE & FLOW ============ */
.price { background: var(--bg); }
.price-inner {
  display: grid;
  grid-template-columns: 0.95fr 1.1fr;
  gap: 32px;
  align-items: stretch;
}
.price-card, .flow-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 36px;
}
.price-card .section-eyebrow,
.flow-card .section-eyebrow { margin-bottom: 20px; }

.price-product {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
  align-items: center;
  padding: 16px 0 22px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 18px;
}
.price-product img {
  max-height: 180px;
  width: auto;
  margin: 0 auto;
}
.price-name {
  font-family: var(--serif-ja);
  font-weight: 600;
  font-size: 16px;
  color: var(--navy);
  margin: 0 0 4px;
  letter-spacing: 0.05em;
}
.price-spec {
  font-size: 12px;
  color: var(--text-mute);
  margin: 0 0 12px;
}
.price-amount {
  margin: 0 0 4px;
  display: flex;
  align-items: baseline;
  gap: 4px;
  color: var(--navy-deep);
  font-family: var(--serif-en);
}
.price-amount .num { font-size: 38px; font-weight: 600; letter-spacing: 0.04em; }
.price-amount .yen { font-size: 16px; font-weight: 500; font-family: var(--serif-ja); }
.price-amount .tax { font-size: 11px; color: var(--text-mute); font-family: var(--sans-ja); }
.price-sub {
  font-size: 12px;
  color: var(--gold);
  letter-spacing: 0.2em;
  margin: 0;
}
.price-note {
  font-size: 11px;
  color: var(--text-mute);
  line-height: 1.7;
  margin: 0;
}

.flow-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  position: relative;
}
.flow-list li {
  text-align: center;
  padding: 14px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.flow-num {
  font-family: var(--serif-en);
  font-size: 20px;
  color: var(--gold);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.flow-list img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  margin-bottom: 10px;
}
.flow-list strong {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 4px;
  letter-spacing: 0.05em;
}
.flow-list span {
  font-size: 10.5px;
  color: var(--text-mute);
  line-height: 1.6;
}

@media (max-width: 880px) {
  .price-inner { grid-template-columns: 1fr; }
  .flow-list { grid-template-columns: repeat(2, 1fr); }
}

/* ============ FAQ ============ */
.faq { background: var(--bg-soft); }
.faq .section-eyebrow,
.faq .section-title { text-align: center; }

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 880px;
  margin: 40px auto 0;
}
details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 22px;
  cursor: pointer;
  transition: background .2s;
}
details[open] { background: #FFFEFA; }
summary {
  list-style: none;
  font-family: var(--serif-ja);
  font-weight: 500;
  font-size: 14px;
  color: var(--navy);
  position: relative;
  padding-right: 28px;
  letter-spacing: 0.04em;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--gold);
  font-family: var(--serif-en);
  transition: transform .25s;
}
details[open] summary::after { content: "−"; }
details p {
  margin: 14px 0 0;
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.85;
}

@media (max-width: 760px) {
  .faq-grid { grid-template-columns: 1fr; }
}

/* ============ FINAL CTA ============ */
.cta {
  background: linear-gradient(135deg, var(--navy-deep), var(--navy));
  color: #fff;
  position: relative;
  overflow: hidden;
  padding: 100px 0;
}
.cta-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(201,169,97,0.12), rgba(201,169,97,0) 50%),
    radial-gradient(circle at 80% 70%, rgba(201,169,97,0.10), rgba(201,169,97,0) 55%);
}
.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
}
.cta-eyebrow {
  font-family: var(--serif-en);
  font-size: 13px;
  letter-spacing: 0.5em;
  color: var(--gold-soft);
  margin: 0 0 18px;
}
.cta-title {
  font-family: var(--serif-ja);
  font-weight: 500;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.7;
  letter-spacing: 0.08em;
  margin: 0 0 40px;
}
.cta-sub {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.2em;
  margin: 18px 0 0;
}

/* ============ FOOTER ============ */
.site-footer {
  background: #fff;
  padding: 50px 0 30px;
  border-top: 1px solid var(--line);
}
.footer-inner {
  text-align: center;
}
.footer-logo {
  height: 28px;
  margin: 0 auto 12px;
}
.footer-clinic {
  font-size: 12px;
  color: var(--text-sub);
  letter-spacing: 0.2em;
  margin: 0 0 22px;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  margin: 0 0 22px;
}
.footer-links a {
  font-size: 11px;
  color: var(--text-mute);
  letter-spacing: 0.1em;
  transition: color .2s;
}
.footer-links a:hover { color: var(--navy); }
.footer-copy {
  font-size: 10px;
  color: var(--text-mute);
  letter-spacing: 0.15em;
  margin: 0;
}

/* ============ Reveal animation ============ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .8s ease, transform .8s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}