.page-products {
  --pd-grid-line: rgba(217, 205, 232, 0.38);
  --pd-pad-x: clamp(18px, 4.5vw, 56px);
  --pd-section-gap: clamp(48px, 7vw, 96px);

  display: block;
  position: relative;
  background-color: var(--cream);
  background-image:
    repeating-linear-gradient(0deg, var(--pd-grid-line) 0 1px, transparent 1px 92px),
    repeating-linear-gradient(90deg, var(--pd-grid-line) 0 1px, transparent 1px 92px);
  color: var(--ink);
  padding-bottom: clamp(40px, 6vw, 72px);
}

.page-products > section {
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--pd-pad-x);
}

.page-products h1,
.page-products h2,
.page-products h3 {
  font-family: var(--font-display);
}

/* ---------- hero ---------- */
.page-products .pd-hero {
  padding-top: clamp(22px, 3.5vw, 44px);
  padding-bottom: clamp(30px, 5vw, 60px);
  position: relative;
}

.page-products .pd-hero::after {
  content: "";
  display: block;
  width: clamp(72px, 14vw, 168px);
  height: 3px;
  margin-top: clamp(22px, 3vw, 34px);
  border-radius: 999px;
  background: linear-gradient(90deg, var(--gold), rgba(201, 162, 39, 0));
}

.page-products .pd-hero__idx {
  margin: clamp(18px, 3vw, 30px) 0 0;
  color: var(--gold);
  letter-spacing: 0.14em;
}

.page-products .pd-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(2.05rem, 6.4vw, 4.1rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 17ch;
}

.page-products .pd-hero__lead {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.85;
  color: var(--mauve);
}

.page-products .pd-hero__toc {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--line);
  max-width: 760px;
}

.page-products .pd-hero__toc li {
  border-bottom: 1px solid var(--line);
}

.page-products .pd-hero__toc a {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 13px 4px;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(0.98rem, 1.7vw, 1.12rem);
  transition: color 0.22s ease, transform 0.22s ease;
}

.page-products .pd-hero__toc a:hover,
.page-products .pd-hero__toc a:focus-visible {
  color: var(--violet);
  transform: translateX(5px);
}

.page-products .pd-hero__toc .mono {
  color: var(--gold);
  font-size: 0.8em;
  letter-spacing: 0.08em;
}

/* ---------- shared head ---------- */
.page-products .pd-head {
  max-width: 780px;
}

.page-products .pd-head .eyebrow {
  margin: 0;
  color: var(--gold);
  letter-spacing: 0.14em;
}

.page-products .pd-head h2 {
  margin: 10px 0 0;
  font-size: clamp(1.55rem, 3.4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-products .pd-head__lead {
  margin: 14px 0 0;
  font-size: clamp(0.98rem, 1.6vw, 1.05rem);
  line-height: 1.85;
  color: var(--mauve);
}

/* ---------- flow ---------- */
.page-products .pd-flow {
  padding-top: var(--pd-section-gap);
}

.page-products .pd-flow__figure {
  margin-top: clamp(26px, 4vw, 40px);
}

.page-products .pd-deck {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(26px, 4vw, 40px);
}

.page-products .play-card {
  margin: 0;
  min-width: 0;
}

.page-products .play-card__stage {
  display: grid;
  perspective: 1500px;
  min-height: 100%;
}

.page-products .play-card__face {
  grid-area: 1 / 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.8vw, 30px);
  border-radius: var(--radius-lg);
  background: var(--ivory);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.22, 0.7, 0.28, 1), opacity 0.45s ease;
  will-change: transform;
}

.page-products .play-card__face--front {
  transform: rotateY(0deg);
  opacity: 1;
}

.page-products .play-card__face--back {
  transform: rotateY(-180deg);
  opacity: 0;
  pointer-events: none;
  background: linear-gradient(155deg, var(--violet) 0%, var(--violet-deep) 70%, var(--ink) 100%);
  border-color: transparent;
  box-shadow: var(--shadow-plate);
}

.page-products .play-card__switch:checked ~ .play-card__stage .play-card__face--front {
  transform: rotateY(180deg);
  opacity: 0;
  pointer-events: none;
}

.page-products .play-card__switch:checked ~ .play-card__stage .play-card__face--back {
  transform: rotateY(0deg);
  opacity: 1;
  pointer-events: auto;
}

.page-products .play-card__no {
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-products .play-card__face h3 {
  margin: 0;
  font-size: clamp(1.16rem, 2vw, 1.36rem);
  font-weight: 800;
  color: var(--violet);
}

.page-products .play-card__face--back h3 {
  color: var(--gold-soft);
}

.page-products .play-card__face p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--mauve);
}

.page-products .play-card__face--back ul {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-products .play-card__face--back li {
  position: relative;
  padding-left: 18px;
  font-size: 0.93rem;
  line-height: 1.72;
  color: rgba(255, 251, 243, 0.88);
}

.page-products .play-card__face--back li::before {
  content: "◆";
  position: absolute;
  left: 0;
  top: 0.45em;
  font-size: 0.6em;
  color: var(--gold);
}

.page-products .play-card__flip {
  align-self: flex-start;
  margin-top: auto;
  padding-top: 6px;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--violet);
  border-bottom: 1px solid var(--line-gold-strong);
  padding-bottom: 3px;
  user-select: none;
  transition: color 0.22s ease, border-color 0.22s ease;
}

.page-products .play-card__flip:hover,
.page-products .play-card__flip:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}

.page-products .play-card__flip--back {
  color: var(--gold-soft);
  border-color: rgba(233, 217, 164, 0.5);
}

.page-products .play-card__flip--back:hover,
.page-products .play-card__flip--back:focus-visible {
  color: var(--ivory);
  border-color: var(--ivory);
}

.page-products .pd-flow__aside {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 34px);
  align-items: center;
  margin-top: clamp(28px, 4vw, 46px);
}

.page-products .pd-flow__note h3 {
  margin: 0 0 10px;
  font-size: clamp(1.1rem, 1.9vw, 1.3rem);
  font-weight: 700;
  color: var(--violet);
}

.page-products .pd-flow__note p {
  margin: 0 0 12px;
}

/* ---------- rank ---------- */
.page-products .pd-rank {
  padding-top: var(--pd-section-gap);
}

.page-products .pd-rank__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: center;
  margin-top: clamp(26px, 4vw, 42px);
}

.page-products .pd-rank__intro h3 {
  margin: 0 0 10px;
  font-size: clamp(1.1rem, 1.9vw, 1.3rem);
  font-weight: 700;
  color: var(--violet);
}

.page-products .pd-rank__intro p {
  margin: 0 0 12px;
}

.page-products .pd-rank__grid {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: clamp(12px, 1.8vw, 20px);
}

.page-products .rank-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(16px, 2vw, 22px);
  padding-left: clamp(18px, 2.2vw, 24px);
  background: var(--ivory);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-products .rank-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--gold), rgba(201, 162, 39, 0.12));
}

.page-products .rank-card__top {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-products .rank-card__no {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-products .rank-card__top h3 {
  margin: 0;
  font-size: 1.04rem;
  font-weight: 700;
  color: var(--violet);
}

.page-products .rank-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-products .rank-card__list li {
  position: relative;
  padding-left: 14px;
  font-size: 0.88rem;
  line-height: 1.62;
  color: var(--mauve);
}

.page-products .rank-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--turf);
}

.page-products .rank-card__meter {
  margin-top: auto;
  height: 4px;
  border-radius: 999px;
  background: rgba(217, 205, 232, 0.7);
  overflow: hidden;
}

.page-products .rank-card__meter span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--turf), #4fa694);
}

/* ---------- download ---------- */
.page-products .pd-download {
  padding-top: var(--pd-section-gap);
}

.page-products .pd-os {
  margin-top: clamp(26px, 4vw, 40px);
}

.page-products .pd-os__bar {
  display: inline-flex;
  gap: 4px;
  padding: 5px;
  border-radius: 999px;
  background: rgba(75, 46, 131, 0.09);
  max-width: 100%;
}

.page-products .pd-os__tab {
  cursor: pointer;
  padding: 9px 22px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--violet);
  user-select: none;
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.page-products .pd-os__input:focus-visible ~ .pd-os__bar .pd-os__tab {
  box-shadow: 0 0 0 3px var(--gold-soft);
}

.page-products #pd-os-win:checked ~ .pd-os__bar label[for="pd-os-win"],
.page-products #pd-os-mac:checked ~ .pd-os__bar label[for="pd-os-mac"] {
  background: var(--violet);
  color: var(--ivory);
  box-shadow: 0 10px 22px -14px rgba(75, 46, 131, 0.95);
}

.page-products .pd-os__panels {
  margin-top: clamp(16px, 2.4vw, 24px);
}

.page-products .pd-os__panel {
  display: none;
  padding: clamp(20px, 3vw, 32px);
  background: var(--ivory);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.page-products .pd-os__panel--win {
  display: block;
}

.page-products #pd-os-win:checked ~ .pd-os__panels .pd-os__panel--win {
  display: block;
}

.page-products #pd-os-win:checked ~ .pd-os__panels .pd-os__panel--mac {
  display: none;
}

.page-products #pd-os-mac:checked ~ .pd-os__panels .pd-os__panel--mac {
  display: block;
}

.page-products #pd-os-mac:checked ~ .pd-os__panels .pd-os__panel--win {
  display: none;
}

.page-products .pd-os__panel h3 {
  margin: 0 0 14px;
  font-size: clamp(1.06rem, 1.8vw, 1.24rem);
  font-weight: 700;
  color: var(--violet);
}

.page-products .pd-os__panel ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: pd-os-step;
  display: grid;
  gap: 10px;
}

.page-products .pd-os__panel li {
  counter-increment: pd-os-step;
  display: grid;
  grid-template-columns: 2.1em minmax(0, 1fr);
  gap: 10px;
  font-size: 0.95rem;
  line-height: 1.72;
  color: var(--mauve);
}

.page-products .pd-os__panel li::before {
  content: counter(pd-os-step) ".";
  font-family: var(--font-mono);
  color: var(--gold);
  font-weight: 600;
}

.page-products .pd-os__req {
  margin: 16px 0 0;
  font-size: 0.82rem;
  color: var(--turf);
  letter-spacing: 0.04em;
}

.page-products .pd-download__figure {
  margin-top: clamp(26px, 4vw, 40px);
}

/* ---------- enter ---------- */
.page-products .pd-enter {
  padding-top: var(--pd-section-gap);
}

.page-products .pd-steps {
  list-style: none;
  counter-reset: pd-step;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(12px, 1.8vw, 20px);
}

.page-products .pd-steps__item {
  counter-increment: pd-step;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--ivory);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.page-products .pd-steps__item::before {
  content: counter(pd-step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--gold);
}

.page-products .pd-steps__item p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--mauve);
}

.page-products .pd-steps__item strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink);
}

.page-products .pd-enter__hint {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--vermilion);
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--mauve);
}

/* ---------- resume ---------- */
.page-products .pd-resume {
  padding-top: var(--pd-section-gap);
}

.page-products .pd-resume__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 38px);
  align-items: start;
  margin-top: clamp(24px, 3.4vw, 38px);
}

.page-products .pd-resume__note h3 {
  margin: 0 0 10px;
  font-size: clamp(1.1rem, 1.9vw, 1.3rem);
  font-weight: 700;
  color: var(--violet);
}

.page-products .pd-resume__note p {
  margin: 0 0 12px;
}

.page-products .pd-faq {
  display: grid;
  gap: 10px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-products .pd-faq details {
  background: var(--ivory);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-products .pd-faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.99rem;
  color: var(--ink);
  transition: background 0.22s ease;
}

.page-products .pd-faq summary::-webkit-details-marker {
  display: none;
}

.page-products .pd-faq summary::after {
  content: "＋";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--gold);
  transition: transform 0.25s ease;
}

.page-products .pd-faq details[open] summary {
  background: rgba(201, 162, 39, 0.1);
}

.page-products .pd-faq details[open] summary::after {
  transform: rotate(45deg);
}

.page-products .pd-faq p {
  margin: 0;
  padding: 2px 20px 20px;
  font-size: 0.95rem;
  line-height: 1.82;
  color: var(--mauve);
}

/* ---------- versions ---------- */
.page-products .pd-versions {
  padding-top: var(--pd-section-gap);
}

.page-products .pd-timeline {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
}

.page-products .pd-ver {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.6vw, 30px);
  padding: clamp(16px, 2.4vw, 24px) 0;
  border-bottom: 1px solid var(--line);
}

.page-products .pd-ver:first-child {
  border-top: 1px solid var(--line);
}

.page-products .pd-ver__tag {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--gold);
  min-width: 3.1em;
}

.page-products .pd-ver__body h3 {
  margin: 0;
  font-size: clamp(1rem, 1.6vw, 1.16rem);
  font-weight: 700;
  color: var(--violet);
}

.page-products .pd-ver__body p {
  margin: 8px 0 0;
  font-size: 0.94rem;
  line-height: 1.76;
  color: var(--mauve);
}

.page-products .pd-ver__os {
  font-size: 0.8rem !important;
  color: var(--turf) !important;
  letter-spacing: 0.03em;
}

.page-products .pd-versions__note {
  margin: clamp(22px, 3vw, 32px) 0 0;
  max-width: 68ch;
  font-size: 0.95rem;
  line-height: 1.82;
  color: var(--mauve);
}

/* ---------- next ---------- */
.page-products .pd-next {
  margin-top: var(--pd-section-gap);
  padding: clamp(28px, 4.5vw, 52px);
  border-radius: var(--radius-lg);
  background: linear-gradient(140deg, var(--violet) 0%, var(--violet-deep) 55%, var(--ink) 100%);
  color: var(--ivory);
}

.page-products .pd-next h2 {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 2.05rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--ivory);
}

.page-products .pd-next p {
  margin: 16px 0 0;
  max-width: 64ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(255, 251, 243, 0.82);
}

.page-products .pd-next__links {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-products .pd-next__links a {
  text-decoration: none;
}

/* ---------- responsive ---------- */
@media (min-width: 700px) {
  .page-products .pd-deck {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .pd-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .pd-hero__toc {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 40px);
  }
}

@media (min-width: 820px) {
  .page-products .pd-flow__aside,
  .page-products .pd-rank__top,
  .page-products .pd-resume__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }

  .page-products .pd-rank__top {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  }
}

@media (max-width: 520px) {
  .page-products .pd-os__tab {
    padding: 9px 16px;
    font-size: 0.86rem;
  }

  .page-products .pd-ver {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .page-products .pd-ver__tag {
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .play-card__face,
  .page-products .pd-hero__toc a,
  .page-products .pd-os__tab,
  .page-products .pd-faq summary,
  .page-products .pd-faq summary::after {
    transition: none !important;
  }
}