:root {
  color-scheme: light;
  --ink: #10213d;
  --muted: #58677e;
  --surface: #ffffff;
  --soft: #f3f6fb;
  --line: #dce3ee;
  --accent: #c91424;
  --accent-deep: #910b17;
  --shadow: 0 28px 70px rgba(16, 33, 61, 0.12);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Noto Sans TC", sans-serif;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--surface);
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 91% 8%, rgba(201, 20, 36, 0.07), transparent 28rem),
    linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
  font-size: 1rem;
  line-height: 1.7;
}

a {
  color: inherit;
}

a:focus-visible {
  outline: 3px solid #1f6feb;
  outline-offset: 4px;
  border-radius: 0.5rem;
}

.site-header,
main,
footer {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  min-height: 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid rgba(220, 227, 238, 0.8);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.68rem;
  text-decoration: none;
}

.brand-wordmark {
  position: relative;
  display: inline-block;
  padding: 0.05rem 0.1rem 0.14rem 0;
  color: var(--ink);
  font-family: "Iowan Old Style", "Baskerville", "Times New Roman", serif;
  font-size: 1.55rem;
  font-style: italic;
  font-weight: 700;
  letter-spacing: -0.07em;
  line-height: 1;
  transform: rotate(-2deg);
}

.brand-wordmark i {
  position: absolute;
  right: -0.18rem;
  bottom: 0;
  width: 2.7rem;
  height: 0.13rem;
  background: var(--accent);
  border-radius: 999px;
  transform: rotate(-4deg);
}

.brand-name {
  display: grid;
  gap: 0.08rem;
  line-height: 1.05;
}

.brand-name strong {
  font-size: 0.98rem;
  font-weight: 850;
  letter-spacing: 0.06em;
}

.brand-name small {
  color: var(--muted);
  font-size: 0.58rem;
  font-weight: 750;
  letter-spacing: 0.13em;
}

.header-link {
  color: var(--muted);
  font-weight: 700;
  text-decoration: none;
}

.intro {
  padding: clamp(4.5rem, 10vw, 8rem) 0 clamp(3rem, 7vw, 5rem);
  max-width: 870px;
}

.eyebrow,
.app-kicker {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 850;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 16ch;
  font-size: clamp(2.6rem, 7.5vw, 5.6rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.intro-copy {
  max-width: 42rem;
  margin: 1.6rem 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.catalog {
  padding-bottom: clamp(5rem, 10vw, 8rem);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.6rem;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.7rem);
  line-height: 1.2;
}

.app-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(240px, 0.7fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  min-height: 30rem;
  padding: clamp(2rem, 6vw, 4.5rem);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.93);
  border: 1px solid var(--line);
  border-radius: 2rem;
  box-shadow: var(--shadow);
}

.app-card::before {
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 0.32rem;
  content: "";
  background: linear-gradient(90deg, var(--accent), #f05b67 42%, transparent 86%);
}

.app-card-copy {
  position: relative;
  z-index: 1;
}

.app-identity {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  margin-bottom: 1.5rem;
}

.app-icon {
  width: clamp(5rem, 10vw, 7rem);
  height: auto;
  border-radius: 24%;
  box-shadow: 0 14px 32px rgba(61, 8, 13, 0.2);
}

.app-identity h3 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  line-height: 1.1;
}

.app-card-copy > p {
  max-width: 40rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.feature-list {
  display: grid;
  gap: 0.55rem;
  margin: 1.5rem 0 2rem;
  padding: 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 1.5rem;
}

.feature-list li::before {
  position: absolute;
  left: 0;
  color: var(--accent);
  content: "◆";
  font-size: 0.75rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.button {
  display: inline-flex;
  min-height: 3.15rem;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 10px 28px rgba(201, 20, 36, 0.24);
}

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

.button-secondary {
  background: var(--soft);
  border-color: var(--line);
}

.document-stack {
  position: relative;
  min-height: 24rem;
}

.sheet {
  position: absolute;
  inset: 50% auto auto 50%;
  display: block;
  width: min(16rem, 70vw);
  aspect-ratio: 0.72;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  box-shadow: 0 22px 45px rgba(16, 33, 61, 0.13);
}

.sheet-back {
  transform: translate(-43%, -52%) rotate(11deg);
  background: #e9edf5;
}

.sheet-middle {
  transform: translate(-56%, -49%) rotate(-7deg);
  background: #f7dadd;
}

.sheet-front {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  padding: 2.3rem;
  transform: translate(-50%, -50%);
}

.sheet-label {
  color: var(--accent);
  font-size: 2.6rem;
  font-weight: 900;
  letter-spacing: -0.05em;
}

.sheet-line {
  height: 0.55rem;
  background: #dfe5ef;
  border-radius: 999px;
}

.sheet-line-short {
  width: 65%;
}

.sheet-tool {
  display: inline-block;
  width: fit-content;
  margin-top: auto;
  padding-bottom: 0.15rem;
  color: var(--ink);
  border-bottom: 0.18rem solid var(--accent);
  font-family: "Iowan Old Style", "Baskerville", serif;
  font-size: 1.45rem;
  font-style: italic;
  font-weight: 700;
  letter-spacing: -0.05em;
}

.product-header {
  min-height: 5.5rem;
}

.product-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.7rem, 2.5vw, 1.6rem);
}

.product-nav a {
  color: var(--muted);
  font-weight: 750;
  text-decoration: none;
}

.product-nav .nav-store {
  padding: 0.52rem 1rem;
  color: #fff;
  background: var(--ink);
  border-radius: 999px;
}

.product-main {
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.product-hero,
.feature-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(18rem, 0.9fr);
  gap: clamp(2.5rem, 7vw, 6rem);
  align-items: center;
  min-height: min(46rem, calc(100vh - 5.5rem));
  padding-block: clamp(4rem, 10vw, 8rem);
}

.product-hero h1,
.feature-hero h1 {
  max-width: 13ch;
  font-size: clamp(2.6rem, 6vw, 5.2rem);
}

.product-hero-copy > p,
.feature-intro {
  max-width: 42rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
}

.product-hero-copy .actions {
  margin-top: 2rem;
}

.product-identity {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.product-identity .eyebrow {
  margin: 0;
}

.product-highlight {
  position: relative;
  display: grid;
  gap: 0.75rem;
  min-height: 25rem;
  align-content: center;
  padding: clamp(2rem, 6vw, 4rem);
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 80% 10%, rgba(255, 255, 255, 0.2), transparent 15rem),
    linear-gradient(145deg, var(--accent-deep), var(--accent));
  border-radius: 2rem;
  box-shadow: 0 28px 70px rgba(145, 11, 23, 0.24);
}

.product-highlight::after {
  position: absolute;
  right: -3rem;
  bottom: -5rem;
  width: 14rem;
  height: 18rem;
  content: "";
  background: rgba(255, 255, 255, 0.09);
  border: 2px solid rgba(255, 255, 255, 0.24);
  border-radius: 1.5rem;
  transform: rotate(13deg);
}

.product-highlight strong {
  font-size: clamp(4rem, 10vw, 7rem);
  line-height: 0.95;
  letter-spacing: -0.08em;
}

.product-highlight span {
  position: relative;
  z-index: 1;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 750;
}

.product-features {
  padding-block: clamp(3rem, 7vw, 6rem);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card {
  display: flex;
  min-height: 21rem;
  flex-direction: column;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
}

.feature-badge {
  width: fit-content;
  margin: 0 0 1.25rem;
  padding: 0.25rem 0.75rem;
  color: var(--accent-deep);
  background: #fae7e9;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 800;
}

.feature-card h3 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.2;
}

.feature-card > p:not(.feature-badge) {
  margin: 1rem 0 1.5rem;
  color: var(--muted);
}

.feature-card a,
.text-link {
  width: fit-content;
  margin-top: auto;
  color: var(--accent-deep);
  font-weight: 850;
  text-decoration-thickness: 0.12rem;
  text-underline-offset: 0.25rem;
}

.privacy-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: clamp(2rem, 5vw, 3.5rem);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
}

.privacy-callout h2 {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2.4rem);
  line-height: 1.25;
}

.store-action {
  margin-top: 2rem;
}

.campaign-visual {
  margin: 0;
}

.campaign-visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 1.25rem;
  box-shadow: var(--shadow);
}

.operation-notes {
  max-width: 56rem;
  padding: clamp(2rem, 5vw, 3.5rem);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
}

.operation-notes h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  line-height: 1.25;
}

.operation-notes ul {
  display: grid;
  gap: 0.85rem;
  margin: 1.5rem 0 2rem;
  padding-left: 1.3rem;
  color: var(--muted);
}

.policy-main {
  padding-block: clamp(3.5rem, 8vw, 6.5rem);
}

.policy-heading {
  max-width: 48rem;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}

.policy-heading h1 {
  max-width: none;
  font-size: clamp(2.7rem, 7vw, 5rem);
}

.policy-heading > p:last-child {
  max-width: 42rem;
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.policy-sections {
  display: grid;
  gap: 1rem;
  max-width: 58rem;
}

.policy-lead {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.policy-card,
.policy-legal {
  padding: clamp(1.3rem, 4vw, 2.25rem);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  border-radius: 0.85rem;
}

.policy-card h2 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.25rem, 3vw, 1.65rem);
  line-height: 1.35;
}

.policy-card p,
.policy-legal p {
  margin: 0.75rem 0 0;
  color: var(--muted);
}

.policy-card h2 + p,
.policy-legal p:first-child {
  margin-top: 0;
}

.policy-card ul {
  margin: 0.85rem 0 0;
  padding-left: 1.35rem;
  color: var(--muted);
}

.policy-card a,
.policy-legal a {
  color: var(--accent-deep);
  text-underline-offset: 0.2rem;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 2rem 3rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

footer p {
  margin: 0;
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

footer a {
  font-weight: 700;
  text-underline-offset: 0.25rem;
}

@media (max-width: 760px) {
  .site-header,
  main,
  footer {
    width: min(100% - 1.25rem, 1120px);
  }

  .site-header {
    min-height: 4.5rem;
  }

  .product-header {
    align-items: flex-start;
    flex-direction: column;
    padding-block: 0.8rem;
  }

  .product-nav {
    width: 100%;
    flex-wrap: wrap;
    justify-content: space-between;
  }

  .intro {
    padding-top: 4.5rem;
  }

  h1 {
    font-size: clamp(2.35rem, 12vw, 4rem);
  }

  .app-card {
    grid-template-columns: 1fr;
    padding: 1.4rem;
    border-radius: 1.35rem;
  }

  .product-hero,
  .feature-hero {
    min-height: 0;
    grid-template-columns: 1fr;
    padding-block: 4rem;
  }

  .product-highlight {
    min-height: 20rem;
    border-radius: 1.35rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: 0;
  }

  .privacy-callout {
    align-items: flex-start;
    flex-direction: column;
  }

  .document-stack {
    min-height: 20rem;
  }

  .sheet {
    width: min(13rem, 70vw);
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 360px) {
  .brand {
    gap: 0.5rem;
  }

  .brand-wordmark {
    font-size: 1.35rem;
  }

  .brand-name strong {
    font-size: 0.85rem;
  }

  .brand-name small {
    display: none;
  }

  .app-identity {
    align-items: flex-start;
    flex-direction: column;
  }

  .actions,
  .button {
    width: 100%;
  }

  .product-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-nav a {
    text-align: center;
  }

  .product-identity {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button {
    transition: none;
  }
}