:root {
  --ink: #f8efe6;
  --ink-soft: #cbb7a8;
  --paper: #1a0f12;
  --paper-deep: #12090c;
  --surface: rgba(255, 244, 232, .05);
  --wine: #7a2438;
  --wine-deep: #4a1522;
  --rose: #c45b6a;
  --gold: #d4a574;
  --gold-soft: #e8c9a0;
  --line: rgba(232, 201, 160, .16);
  --shadow: 0 28px 70px rgba(0, 0, 0, .45);
  --radius: 20px;
  --container: 1120px;
  --serif: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "Noto Serif JP", "Shippori Mincho", serif;
  --sans: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", "Noto Sans JP", "Meiryo", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  padding-bottom: 108px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
body.dialog-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img { display: block; max-width: 100%; }
.container { width: min(calc(100% - 36px), var(--container)); margin-inline: auto; }

.site-header {
  position: fixed;
  z-index: 40;
  inset: 0 0 auto;
  transition: background .25s ease, box-shadow .25s ease, backdrop-filter .25s ease;
}
.site-header.scrolled {
  background: rgba(18, 9, 12, .88);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .28);
  backdrop-filter: blur(16px);
}
.header-inner {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  padding: 6px 10px;
  border-radius: 14px;
  background: rgba(255, 248, 242, .94);
  box-shadow: 0 8px 22px rgba(0, 0, 0, .22);
}
.brand-logo {
  width: min(158px, 40vw);
  height: auto;
}
.header-cta {
  flex-shrink: 0;
  padding: 11px 18px;
  border-radius: 999px;
  color: #1a0f12;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold));
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .04em;
  transition: transform .2s ease, filter .2s ease;
}
.header-cta:hover { transform: translateY(-2px); filter: brightness(1.06); }

.hero {
  position: relative;
  min-height: 100svh;
  padding: 118px 0 72px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 55% at 78% 18%, rgba(196, 91, 106, .28), transparent 58%),
    radial-gradient(ellipse 55% 50% at 12% 82%, rgba(122, 36, 56, .35), transparent 55%),
    linear-gradient(165deg, #241318 0%, #1a0f12 48%, #12090c 100%);
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  pointer-events: none;
  animation: drift 10s ease-in-out infinite alternate;
}
.glow-a {
  top: 12%;
  left: -8%;
  width: 320px;
  height: 320px;
  background: rgba(212, 165, 116, .14);
}
.glow-b {
  right: -6%;
  bottom: 8%;
  width: 380px;
  height: 380px;
  background: rgba(122, 36, 56, .28);
  animation-delay: -4s;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: 48px;
}
.adult-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
}
.adult-mark span {
  display: grid;
  place-items: center;
  min-width: 42px;
  height: 28px;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--wine), var(--rose));
  font-size: 12px;
  font-weight: 900;
}
.hero-brand {
  width: min(340px, 78%);
  margin-bottom: 22px;
  padding: 14px 18px;
  border-radius: 18px;
  background: rgba(255, 248, 242, .96);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .28);
  animation: brandIn .9s ease both;
}
.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: .02em;
  text-wrap: balance;
}
.hero h1 em {
  color: var(--gold-soft);
  font-style: normal;
}
.hero-lead {
  max-width: 520px;
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.9;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 30px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 54px;
  padding: 0 24px;
  border: 0;
  border-radius: 999px;
  font-weight: 800;
  letter-spacing: .04em;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
}
.button:hover { transform: translateY(-2px); filter: saturate(1.05); }
.button-primary {
  color: #1a0f12;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold) 55%, #b8874f);
  box-shadow: 0 16px 36px rgba(212, 165, 116, .28);
}
.button svg { width: 20px; height: 20px; fill: currentColor; }
.text-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 0;
  padding: 10px 0;
  color: var(--gold-soft);
  background: transparent;
  font-weight: 700;
  cursor: pointer;
}
.text-button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  transition: transform .2s ease;
}
.text-button:hover svg { transform: translateX(3px); }
.download-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 18px 0 0;
  color: var(--ink-soft);
  font-size: 13px;
}
.download-note .ok { color: #8fce9b; font-weight: 900; }

.hero-stage {
  position: relative;
  min-height: 520px;
  display: grid;
  place-items: center;
}
.stage-ring {
  position: absolute;
  width: min(420px, 88%);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, rgba(232, 201, 160, .22), transparent 42%),
    linear-gradient(145deg, #5a1c2c, #2a1218 55%, #1a0f12);
  box-shadow: inset 0 0 0 1px rgba(232, 201, 160, .18), 0 30px 80px rgba(0, 0, 0, .35);
  animation: pulseRing 5.5s ease-in-out infinite;
}
.phone-shell {
  position: relative;
  z-index: 3;
  width: 258px;
  height: 528px;
  padding: 10px;
  border-radius: 40px;
  background: #2a171d;
  box-shadow: var(--shadow), inset 0 0 0 1px rgba(255, 255, 255, .08);
  transform: rotate(3deg);
  animation: phoneFloat 5s ease-in-out infinite;
}
.phone-top {
  position: absolute;
  z-index: 5;
  top: 14px;
  left: 50%;
  width: 84px;
  height: 22px;
  border-radius: 20px;
  background: #160b0f;
  transform: translateX(-50%);
}
.phone-screen {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  border-radius: 32px;
  background: #1a0f12;
}
.phone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: opacity .35s ease, transform 4.5s ease;
}
.phone-screen img.switching { opacity: .25; transform: scale(1.04); }
.phone-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(18, 9, 12, .2), transparent 28%, transparent 52%, rgba(18, 9, 12, .88));
  pointer-events: none;
}
.phone-ui {
  position: absolute;
  inset: 0;
  z-index: 2;
  color: #fff;
  pointer-events: none;
}
.live-row {
  position: absolute;
  top: 48px;
  left: 14px;
  display: flex;
  gap: 8px;
}
.live-label,
.viewer-count {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 9px;
  border-radius: 8px;
  font-size: 10px;
  font-weight: 800;
  backdrop-filter: blur(6px);
}
.live-label { background: var(--wine); }
.live-label i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #fff;
  animation: blink 1.2s infinite;
}
.viewer-count { background: rgba(18, 9, 12, .45); }
.phone-caption {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 24px;
  display: grid;
  gap: 4px;
}
.phone-caption strong { font-size: 13px; font-family: var(--serif); }
.phone-caption span { font-size: 11px; opacity: .78; }
.float-chip {
  position: absolute;
  z-index: 4;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(26, 15, 18, .78);
  backdrop-filter: blur(10px);
  color: var(--gold-soft);
  font-size: 12px;
  font-weight: 700;
  box-shadow: 0 12px 30px rgba(0, 0, 0, .28);
  animation: chipFloat 4.8s ease-in-out infinite;
}
.chip-a { top: 18%; left: 2%; }
.chip-b { right: 0; bottom: 22%; animation-delay: -2s; }

.signal-strip {
  border-block: 1px solid var(--line);
  background: rgba(255, 244, 232, .03);
}
.signal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 28px 0;
}
.signal-grid div {
  display: grid;
  gap: 6px;
  padding: 8px 12px;
  text-align: center;
}
.signal-grid strong {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--gold-soft);
}
.signal-grid small {
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.6;
}

.section { padding: 88px 0; }
.section-heading {
  max-width: 640px;
  margin: 0 auto 42px;
  text-align: center;
}
.section-heading h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(28px, 3.8vw, 42px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: .02em;
}
.section-heading h2 em {
  color: var(--gold-soft);
  font-style: normal;
}
.section-heading p {
  margin: 14px 0 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.mode-list {
  display: grid;
  gap: 14px;
}
.mode-row {
  display: grid;
  grid-template-columns: 88px 1fr auto;
  align-items: center;
  gap: 18px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  transition: background .2s ease;
}
.mode-row:hover { background: rgba(255, 244, 232, .03); }
.mode-pts {
  color: var(--gold);
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
}
.mode-pts small {
  display: block;
  margin-top: 2px;
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
}
.mode-copy strong {
  display: block;
  margin-bottom: 4px;
  font-size: 17px;
  letter-spacing: .04em;
}
.mode-copy span {
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.7;
}
.mode-go {
  color: var(--gold-soft);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .06em;
  white-space: nowrap;
}

.promo-rail {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.promo-item {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
  aspect-ratio: 16 / 10;
  background: #2a171d;
  cursor: pointer;
  transition: transform .25s ease;
}
.promo-item:hover { transform: translateY(-4px); }
.promo-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.promo-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(18, 9, 12, .55), transparent 50%);
}

.girl-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.girl-card {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: 18px;
  aspect-ratio: 3 / 4;
  background: #2a171d;
  box-shadow: 0 16px 36px rgba(0, 0, 0, .28);
  transition: transform .25s ease, box-shadow .25s ease;
}
.girl-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 22px 44px rgba(0, 0, 0, .38);
}
.girl-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform .45s ease;
}
.girl-card:hover img { transform: scale(1.06); }
.girl-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(18, 9, 12, .72), transparent 42%);
  pointer-events: none;
}
.girl-live {
  position: absolute;
  z-index: 2;
  left: 10px;
  bottom: 10px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(122, 36, 56, .92);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .04em;
}
.girl-live i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
  animation: blink 1.2s infinite;
}

.story {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 48px;
  align-items: center;
}
.story-copy h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(28px, 3.6vw, 40px);
  line-height: 1.35;
}
.story-copy h2 em {
  color: var(--gold-soft);
  font-style: normal;
}
.story-copy p {
  margin: 18px 0 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.95;
}
.story-points {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}
.story-points li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  list-style: none;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.7;
}
.story-points li::before {
  content: "◆";
  color: var(--gold);
  flex-shrink: 0;
  margin-top: 1px;
  font-size: 11px;
}
.story-visual {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  min-height: 360px;
  background:
    radial-gradient(circle at 30% 20%, rgba(232, 201, 160, .2), transparent 40%),
    linear-gradient(160deg, #5a1c2c, #1a0f12);
  box-shadow: var(--shadow);
}
.story-visual img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
  opacity: .92;
}
.story-badge {
  position: absolute;
  left: 20px;
  bottom: 20px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(18, 9, 12, .78);
  backdrop-filter: blur(10px);
}
.story-badge strong {
  display: block;
  font-family: var(--serif);
  font-size: 22px;
  color: var(--gold-soft);
}
.story-badge span {
  color: var(--ink-soft);
  font-size: 12px;
}

.faq-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 36px;
  align-items: start;
}
.faq-list { display: grid; gap: 10px; }
details {
  border-bottom: 1px solid var(--line);
  padding: 4px 0;
}
summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  letter-spacing: .03em;
}
summary::-webkit-details-marker { display: none; }
summary span {
  color: var(--gold);
  font-size: 20px;
  font-weight: 400;
  transition: transform .2s ease;
}
details[open] summary span { transform: rotate(45deg); }
details p {
  margin: 0 0 16px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.85;
}

.final-cta {
  padding: 28px 0 40px;
}
.final-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 34px 36px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    radial-gradient(circle at 90% 20%, rgba(212, 165, 116, .16), transparent 35%),
    linear-gradient(135deg, rgba(74, 21, 34, .65), rgba(26, 15, 18, .9));
}
.final-inner h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(26px, 3.4vw, 36px);
  line-height: 1.35;
}
.final-inner h2 em {
  color: var(--gold-soft);
  font-style: normal;
}
.final-inner p {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

.site-footer {
  padding: 28px 0 36px;
  border-top: 1px solid var(--line);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.footer-inner .brand { background: rgba(255, 248, 242, .96); }
.footer-inner .brand-logo { width: 140px; }
.footer-inner p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 12px;
}

.sticky-download {
  position: fixed;
  z-index: 50;
  left: 50%;
  bottom: 16px;
  width: min(calc(100% - 24px), 720px);
  transform: translateX(-50%) translateY(120%);
  transition: transform .35s ease;
}
.sticky-download.visible { transform: translateX(-50%) translateY(0); }
.sticky-download a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px 14px 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(18, 9, 12, .92);
  backdrop-filter: blur(16px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .4);
}
.sticky-download strong {
  display: block;
  font-size: 14px;
  letter-spacing: .03em;
}
.sticky-download small {
  color: var(--ink-soft);
  font-size: 11px;
}
.sticky-download b {
  flex-shrink: 0;
  padding: 12px 18px;
  border-radius: 999px;
  color: #1a0f12;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold));
  font-size: 13px;
  font-weight: 900;
}

.install-dialog {
  width: min(calc(100% - 32px), 420px);
  padding: 28px 24px 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #1f1216;
  color: var(--ink);
  box-shadow: var(--shadow);
}
.install-dialog::backdrop { background: rgba(8, 4, 6, .72); }
.dialog-close {
  position: absolute;
  top: 12px;
  right: 14px;
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}
.install-dialog h2 {
  margin: 8px 0 0;
  font-family: var(--serif);
  font-size: 26px;
}
.install-dialog ol {
  margin: 20px 0 24px;
  padding: 0;
  display: grid;
  gap: 12px;
  list-style: none;
}
.install-dialog li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.6;
}
.install-dialog li span {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  color: #1a0f12;
  background: var(--gold);
  font-size: 12px;
  font-weight: 900;
  flex-shrink: 0;
}
.install-dialog .button { width: 100%; }

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s ease, transform .7s ease;
  transition-delay: var(--delay, 0ms);
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

@keyframes drift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(24px, -18px, 0); }
}
@keyframes brandIn {
  from { opacity: 0; transform: translateY(12px) scale(.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes phoneFloat {
  0%, 100% { transform: rotate(3deg) translateY(0); }
  50% { transform: rotate(3deg) translateY(-10px); }
}
@keyframes pulseRing {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.04); opacity: .92; }
}
@keyframes chipFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: .35; }
}

@media (max-width: 960px) {
  .hero-grid,
  .story,
  .faq-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 104px; min-height: auto; }
  .hero-stage { min-height: 480px; order: -1; }
  .hero-brand { width: min(280px, 72%); margin-inline: auto; }
  .hero-copy { text-align: center; }
  .hero-lead { margin-inline: auto; }
  .hero-actions { justify-content: center; }
  .download-note { justify-content: center; }
  .promo-rail { grid-template-columns: 1fr; }
  .girl-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .final-inner { flex-direction: column; text-align: center; }
  .faq-grid .section-heading { text-align: left; margin: 0; }
}

@media (max-width: 720px) {
  .signal-grid { grid-template-columns: 1fr; }
  .mode-row {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 16px 4px;
  }
  .mode-go { justify-self: start; }
  .phone-shell { width: 230px; height: 470px; }
  .sticky-download a { border-radius: 22px; align-items: stretch; }
  .sticky-download span { min-width: 0; }
  .chip-a { left: -4%; }
  .chip-b { right: -4%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .reveal { opacity: 1; transform: none; }
}