:root {
  --paper: #fffaf2;
  --paper-strong: #fff3df;
  --ink: #191513;
  --muted: #5e5248;
  --line: #eadbc9;
  --red: #dd3f38;
  --red-dark: #a82924;
  --gold: #dba53c;
  --jade: #2f7462;
  --blue: #386d9f;
  --shadow: 0 22px 54px rgba(71, 45, 27, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(221, 63, 56, 0.14), transparent 32%),
    linear-gradient(225deg, rgba(47, 116, 98, 0.16), transparent 34%),
    var(--paper);
  font-family: "Avenir Next", "Trebuchet MS", "Gill Sans", sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px clamp(18px, 4vw, 48px);
  background: rgba(255, 250, 242, 0.88);
  border-bottom: 1px solid rgba(234, 219, 201, 0.9);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: 0 8px 18px rgba(221, 63, 56, 0.22);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 700;
}

.site-nav a {
  text-decoration: none;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 14px 30px rgba(25, 21, 19, 0.2);
}

.button.secondary {
  background: transparent;
  color: var(--ink);
  box-shadow: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.8fr);
  align-items: center;
  gap: clamp(28px, 6vw, 72px);
  min-height: calc(100vh - 72px);
  padding: clamp(42px, 7vw, 88px) clamp(18px, 6vw, 72px) 42px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--red-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  max-width: 850px;
  font-size: clamp(3.4rem, 9.6vw, 8.8rem);
  line-height: 0.88;
}

.hero-copy {
  max-width: 710px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 1.8vw, 1.32rem);
}

.inline-cantonese {
  display: block;
  margin-bottom: 8px;
  color: var(--red-dark);
  font-size: clamp(1.18rem, 2.4vw, 1.7rem);
  font-weight: 900;
  line-height: 1.15;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.store-button {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  min-width: 174px;
  min-height: 58px;
  padding: 8px 16px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  box-shadow: 0 14px 30px rgba(25, 21, 19, 0.2);
}

.store-button span {
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.1;
  opacity: 0.78;
}

.store-button strong {
  font-size: 1.1rem;
  line-height: 1.2;
}

.store-button.disabled {
  cursor: default;
  background: transparent;
  color: var(--ink);
  box-shadow: none;
  opacity: 0.62;
}

.phone-stage {
  position: relative;
  min-height: 660px;
  display: grid;
  place-items: center;
}

.phone {
  position: relative;
  width: min(342px, 86vw);
  padding: 10px;
  border: 2px solid #17110e;
  border-radius: 36px;
  background: #191513;
  box-shadow: var(--shadow);
}

.app-screenshot {
  display: block;
  width: 100%;
  height: auto;
  overflow: hidden;
  border-radius: 28px;
}

.screen-note {
  position: absolute;
  right: min(3vw, 22px);
  bottom: 72px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.88);
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
  box-shadow: 0 12px 28px rgba(71, 45, 27, 0.12);
}

.section {
  padding: clamp(54px, 8vw, 86px) clamp(18px, 6vw, 72px);
  border-top: 1px solid rgba(234, 219, 201, 0.9);
}

.section h2 {
  max-width: 780px;
  font-size: clamp(2.1rem, 5vw, 4.6rem);
  line-height: 0.96;
}

.section-intro {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.1rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 34px;
  background: var(--line);
  border: 1px solid var(--line);
}

.feature {
  min-height: 230px;
  padding: 22px;
  background: rgba(255, 253, 248, 0.88);
}

.feature span {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-bottom: 34px;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-weight: 900;
}

.feature h3 {
  font-size: 1.25rem;
}

.feature p {
  margin: 10px 0 0;
  color: var(--muted);
}

.feature:nth-child(1) {
  background: #fffdf8;
}

.feature:nth-child(2) {
  background: #fff6ea;
}

.feature:nth-child(3) {
  background: #f4fbf6;
}

.feature:nth-child(4) {
  background: #f6f8ff;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 68px);
  align-items: start;
}

.list {
  display: grid;
  gap: 12px;
  margin-top: 6px;
}

.list-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.list-item h3 {
  font-size: 1.28rem;
}

.list-item p {
  margin: 8px 0 0;
  color: var(--muted);
}

.access-section {
  background: rgba(255, 253, 248, 0.68);
}

.access-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.access-card {
  min-height: 230px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffdf8;
  box-shadow: 0 14px 34px rgba(71, 45, 27, 0.08);
}

.access-card span {
  display: inline-flex;
  margin-bottom: 36px;
  padding: 7px 10px;
  border: 1px solid var(--jade);
  border-radius: 999px;
  color: var(--jade);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.access-card.premium {
  background:
    linear-gradient(135deg, rgba(221, 63, 56, 0.12), transparent 44%),
    #fff8ed;
}

.access-card.premium span {
  border-color: var(--red);
  color: var(--red-dark);
}

.access-card h3 {
  font-size: 1.45rem;
}

.access-card p {
  margin: 10px 0 0;
  color: var(--muted);
}

.download {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  background: var(--ink);
  color: #fff;
}

.download h2 {
  color: #fff;
}

.download .section-intro {
  color: rgba(255, 255, 255, 0.76);
}

.download .button {
  background: #fff;
  color: var(--ink);
  border-color: #fff;
}

.store-stack {
  display: grid;
  gap: 12px;
  min-width: min(280px, 100%);
}

.download .store-button.light {
  border-color: #fff;
  background: #fff;
  color: var(--ink);
}

.download .store-button.light.disabled {
  background: transparent;
  color: #fff;
  opacity: 0.74;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(18px, 6vw, 72px);
  color: var(--muted);
  background: #fffdf8;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a {
  font-weight: 800;
  text-decoration: none;
}

@media (max-width: 920px) {
  .hero,
  .split,
  .download {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .phone-stage {
    min-height: 620px;
  }

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

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

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    position: static;
  }

  .site-nav {
    display: none;
  }

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

  .feature {
    min-height: auto;
  }

  .feature span {
    margin-bottom: 20px;
  }

  .phone {
    width: min(300px, 92vw);
  }

  .screen-note {
    position: static;
    margin-top: 12px;
  }

  .site-footer {
    flex-direction: column;
  }
}