:root {
  --bg: #fbfbfd;
  --bg-soft: #f5f5f7;
  --panel: #ffffff;
  --line: rgba(0, 0, 0, 0.08);
  --line-soft: rgba(0, 0, 0, 0.04);
  --text: #1d1d1f;
  --muted: #6e6e73;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.08);
  --radius-xl: 36px;
  --radius-lg: 28px;
  --max-width: 1200px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(180deg, #ffffff 0%, #fbfbfd 36%, #f5f5f7 100%);
  color: var(--text);
  line-height: 1.5;
  letter-spacing: -0.02em;
  overflow-x: hidden;
}

main {
  padding-top: 52px;
}

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

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

br.pc {
  display: inline;
}

br.sp {
  display: none;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(251, 251, 253, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.header.is-scrolled {
  background: rgba(251, 251, 253, 0.9);
  border-color: var(--line-soft);
}

.header__inner {
  width: min(calc(100% - 32px), 1024px);
  height: 52px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  white-space: nowrap;
}

.logo__image {
  width: 28px;
  height: 28px;
  object-fit: contain;
  flex: 0 0 auto;
}

.logo__text {
  display: block;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  font-size: 0.78rem;
  color: rgba(29, 29, 31, 0.84);
  transition: color 0.2s ease;
}

.nav a:hover {
  color: #000;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 500;
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button--primary {
  background: var(--accent);
  color: #fff;
}

.button--primary:hover {
  background: var(--accent-hover);
}

.button--secondary {
  color: var(--accent);
}

.button--secondary:hover {
  color: var(--accent-hover);
}

.hero {
  padding: 60px 16px 72px;
  text-align: center;
}

.hero__inner {
  width: min(100%, 1200px);
  margin: 0 auto;
}

.eyebrow {
  display: inline-block;
  font-size: 1.05rem;
  font-weight: 600;
  color: #bf4800;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(2.2rem, 8vw, 4.9rem);
  line-height: 0.95;
  letter-spacing: -0.07em;
  font-weight: 600;
}

.hero h2 {
  margin-top: 14px;
  font-size: clamp(1.2rem, 2.4vw, 1rem);
  line-height: 1.18;
  font-weight: 500;
  color: var(--text);
}

.hero__links {
  margin-top: 24px;
  display: flex;
  justify-content: center;
  gap: 26px;
  flex-wrap: wrap;
}

.hero__links a {
  font-size: 1.28rem;
  color: var(--accent);
  font-weight: 400;
}

.hero__links a:hover {
  color: var(--accent-hover);
}

.hero__visual {
  position: relative;
  width: min(100%, 1180px);
  margin: 48px auto 0;
  padding: 34px;
  border-radius: 42px;
  background: linear-gradient(180deg, #ffffff 0%, #f5f5f7 100%);
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.hero__visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 18%, rgba(0, 113, 227, 0.12), transparent 24%),
    radial-gradient(circle at 82% 30%, rgba(116, 86, 255, 0.10), transparent 22%),
    linear-gradient(180deg, rgba(255,255,255,0.6), rgba(255,255,255,0));
  pointer-events: none;
}

.product-stage {
  position: relative;
  min-height: 640px;
  border-radius: 30px;
  /* border: 1px solid rgba(255,255,255,0.8); */
  /* overflow: hidden; */
  display: grid;
  place-items: center;
}

.product-stage::before {
  content: "";
  position: absolute;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  /* background: radial-gradient(circle, rgba(255,255,255,0.9), rgba(255,255,255,0)); */
  top: -180px;
  left: 50%;
  transform: translateX(-50%);
  filter: blur(6px);
}

.product-stage__image {
  position: relative;
  width: min(92%, 920px);
  max-height: 560px;
  object-fit: contain;
  filter: drop-shadow(0 40px 60px rgba(0, 0, 0, 0.18));
}

.hero__caption {
  margin-top: 26px;
  font-size: 1.3rem;
  color: var(--muted);
}

.section {
  padding: 84px 16px;
}

.section--tight {
  padding-top: 48px;
  scroll-margin-top: 88px;
}

.section__inner {
  width: min(100%, var(--max-width));
  margin: 0 auto;
}

.section__heading {
  text-align: center;
  margin-bottom: 48px;
}

.section__heading h2 {
  font-size: clamp(2.6rem, 6vw, 2.8rem);
  line-height: 1.02;
  letter-spacing: -0.07em;
  font-weight: 600;
}

.section__heading p {
  width: min(100%, 780px);
  margin: 16px auto 0;
  font-size: clamp(1.08rem, 2vw, 1.45rem);
  color: var(--muted);
  line-height: 1.35;
}

.split {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.feature {
  min-height: 0;
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, #ffffff 0%, #f5f5f7 100%);
  border: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: var(--shadow);
  padding: 52px 48px;
  position: relative;
  overflow: hidden;
  transform: translateY(24px);
  opacity: 0;
  transition: transform 0.8s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.8s ease;
}

.feature.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.feature__eyebrow {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 12px;
}

.feature h3 {
  font-size: clamp(2rem, 2.5vw, 3.4rem);
  line-height: 1.04;
  letter-spacing: -0.06em;
  font-weight: 600;
  max-width: 28ch;
}

.feature__layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 32px;
  align-items: center;
}

.feature__content {
  min-width: 0;
}

.feature p {
  margin-top: 16px;
  max-width: 90ch;
  color: var(--muted);
  font-size: 1.3rem;
  line-height: 1.5;
}

.feature__media {
  border-radius: 24px;
  overflow: visible;
  background: transparent;
  border: 0;
}

.feature__image {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.feature__caption {
  padding: 12px 14px 14px;
  font-size: 0.9rem;
  line-height: 1.45;
  color: var(--muted);
}

.feature__caption-line {
  display: inline-block;
  padding-left: 1em;
}

.signal-chart {
  position: relative;
  margin-top: 32px;
  padding: 28px 24px 22px;
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(240, 246, 255, 0.96));
  border: 1px solid rgba(0, 113, 227, 0.12);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    0 18px 36px rgba(0, 113, 227, 0.08);
  overflow: hidden;
}

.signal-chart::before {
  content: "";
  position: absolute;
  inset: -20% auto auto -10%;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  /* background: radial-gradient(circle, rgba(0, 113, 227, 0.16), rgba(0, 113, 227, 0)); */
  pointer-events: none;
}

.signal-chart__grid {
  position: absolute;
  inset: 20px 24px 38px;
  background-image: linear-gradient(rgba(0, 113, 227, 0.08) 1px, transparent 1px);
  background-size: 100% calc(100% / 4);
  pointer-events: none;
}

.signal-chart__heading {
  position: relative;
  z-index: 1;
  margin-bottom: 10px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(29, 29, 31, 0.56);
}

.signal-chart__legend {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-bottom: 18px;
}

.signal-chart__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: rgba(29, 29, 31, 0.68);
}

.signal-chart__legend-swatch {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  flex: 0 0 auto;
}

.signal-chart__legend-swatch--blue {
  background: rgba(0, 113, 227, 0.95);
}

.signal-chart__legend-swatch--red {
  background: rgba(225, 59, 48, 0.95);
}

.signal-chart__plot {
  position: relative;
  height: 220px;
  padding-bottom: 28px;
}

.signal-chart__line {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.signal-chart__line polyline {
  fill: none;
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.95;
}

.signal-chart__series--blue {
  stroke: rgba(0, 113, 227, 0.95);
  stroke-width: 2.2;
}

.signal-chart__series--red {
  stroke: rgba(225, 59, 48, 0.95);
  stroke-width: 2.2;
}

.signal-chart__point {
  display: none;
}

.signal-chart__dot {
  display: none;
}

.signal-chart__label {
  display: none;
}

.signal-chart__axis {
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: -2px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(29, 29, 31, 0.56);
}

.signal-chart__axis span:nth-child(1) {
  text-align: left;
}

.signal-chart__axis span:nth-child(2),
.signal-chart__axis span:nth-child(3) {
  text-align: center;
}

.signal-chart__axis span:nth-child(4) {
  text-align: right;
}

.full-panel {
  min-height: 640px;
  border-radius: 46px;
  background: linear-gradient(180deg, #000000 0%, #101114 100%);
  color: #f5f5f7;
  padding: 72px 48px;
  position: relative;
  overflow: hidden;
  transform: translateY(24px);
  opacity: 0;
  transition: transform 0.8s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.8s ease;
}

.full-panel.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.full-panel::before {
  content: "";
  position: absolute;
  inset: auto -10% -30% auto;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,113,227,0.55), transparent 64%);
  filter: blur(18px);
}

.full-panel h3 {
  position: relative;
  z-index: 1;
  font-size: clamp(2.1rem, 4.4vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.07em;
  font-weight: 600;
  text-align: center;
}

.full-panel p {
  position: relative;
  z-index: 1;
  width: min(100%, 760px);
  margin: 18px auto 0;
  text-align: center;
  font-size: clamp(1.08rem, 2vw, 1.4rem);
  color: rgba(245,245,247,0.72);
}

.specs {
  margin-top: 42px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  position: relative;
  z-index: 1;
}

.spec {
  border-radius: 30px;
  padding: 28px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(14px);
  text-align: center;
}

.spec strong {
  display: block;
  font-size: clamp(1.8rem, 2.8vw, 2.6rem);
  line-height: 1;
  letter-spacing: -0.05em;
  margin-bottom: 10px;
  font-weight: 600;
}

.spec span {
  color: rgba(245,245,247,0.72);
  font-size: 0.98rem;
}

.buy {
  text-align: center;
  padding-bottom: 96px;
}

.buy h2 {
  font-size: clamp(2rem, 4.4vw, 3.8rem);
  line-height: 1.02;
  letter-spacing: -0.07em;
  font-weight: 600;
}

.buy p {
  width: min(100%, 760px);
  /* margin: 0 auto; */
  font-size: clamp(1.08rem, 2vw, 1.38rem);
  color: var(--muted);
}

.buy__actions {
  margin-top: 26px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
  align-items: center;
}

.buy__notice {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 18px 20px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(0, 0, 0, 0.06);
  text-align: left;
  font-size: 0.7rem;
  line-height: 1.7;
  color: var(--muted);
}

.buy__notice-title {
  text-align: center;
}

.buy__notice p + p {
  margin-top: 8px;
}

.buy__notice-booth {
  margin-top: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
}

.buy__notice-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 64px;
  padding: 0 30px;
  border-radius: 999px;
  background: #d93025;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1;
}

.review-card {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  margin: 0 auto 32px;
  padding: 28px;
  border-radius: 32px;
  text-align: left;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(245, 245, 247, 0.96));
  border: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.08);
}

.review-card__photo {
  min-height: 260px;
  border-radius: 0;
  overflow: visible;
  background: transparent;
  border: 0;
}

.review-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.review-card__body {
  padding: 10px 18px 10px 6px;
}

.review-card__body h3 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.05em;
  font-weight: 600;
}

.review-card__school {
  display: block;
  /* margin: 0 0 8px 0; */
  padding-left: 0;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: rgba(29, 29, 31, 0.56);
}

.review-card__eyebrow {
  margin: 0 0 10px;
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #bf4800;
}

.review-card__comment {
  margin-top: 18px;
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--muted);
}

.footer {
  padding: 22px 16px 48px;
  color: var(--muted);
  font-size: 0.84rem;
}

.footer__inner {
  width: min(calc(100% - 32px), 1024px);
  margin: 0 auto;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

[data-reveal] {
  will-change: transform, opacity;
}

@media (max-width: 1024px) {
  .split,
  .specs {
    grid-template-columns: 1fr;
  }

  .feature,
  .full-panel {
    min-height: auto;
  }

}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  body {
    font-size: 1rem;
  }

  br.pc {
    display: none;
  }

  br.sp {
    display: inline;
  }

  .header__inner {
    height: 58px;
    padding: 0;
    position: relative;
    justify-content: center;
  }

  .logo {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    gap: 10px;
    line-height: 1;
  }

  .logo__image {
    width: 28px;
    height: 28px;
    max-width: 28px;
    max-height: 28px;
  }

  .logo__text {
    display: none;
  }

  #design .section__heading h2 {
    font-size: clamp(2rem, 7vw, 2.3rem);
  }

  .menu-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.14);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px) scale(0.98);
    transform-origin: top center;
    transition: opacity 0.28s ease, transform 0.28s ease, visibility 0.28s ease;
  }

  .header.is-menu-open .nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0) scale(1);
  }

  .nav a {
    padding: 14px 12px;
    text-align: center;
    font-size: 0.95rem;
  }

  .header.is-menu-open .menu-toggle span:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
  }

  .header.is-menu-open .menu-toggle span:nth-child(2) {
    opacity: 0;
  }

  .header.is-menu-open .menu-toggle span:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
  }

  main {
    padding-top: 58px;
  }

  .hero {
    padding-top: 40px;
  }

  .hero__visual {
    width: 100%;
    margin-top: 32px;
    padding: 18px;
    background: #fff;
    border-radius: 28px;
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.08);
  }

  .product-stage {
    min-height: auto;
    border-radius: 24px;
    background: transparent;
  }

  .product-stage__image {
    width: 100%;
    max-height: none;
  }

  .feature,
  .full-panel {
    padding: 28px 22px;
    border-radius: 28px;
  }

  .feature {
    padding: 32px 24px;
  }

  .feature__layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .feature p {
    max-width: 90ch;
  }

  .review-card {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 22px;
    border-radius: 24px;
  }

  .review-card__photo {
    min-height: 220px;
  }

  .review-card__body {
    padding: 4px 8px 10px;
  }

  .review-card__body h3 {
    font-size: clamp(1.5rem, 6vw, 2rem);
  }

  .review-card__school {
    font-size: 0.82rem;
  }

  .signal-chart {
    margin-top: 24px;
    padding: 22px 18px 18px;
    border-radius: 24px;
  }

  .signal-chart__grid {
    inset: 18px 18px 34px;
  }

  .signal-chart__plot {
    height: 180px;
    padding-bottom: 24px;
  }

  .signal-chart__heading {
    margin-bottom: 14px;
  }

  .signal-chart__legend {
    gap: 8px 12px;
    margin-bottom: 14px;
  }

  .signal-chart__legend-item {
    font-size: 0.7rem;
  }

  .signal-chart__axis {
    font-size: 0.66rem;
    letter-spacing: 0.02em;
  }

  .hero__visual::before,
  .product-stage::before {
    display: none;
  }
}