:root {
  color-scheme: light;
  --paper: #f6f1e8;
  --ink: #29211a;
  --muted: #65584b;
  --accent: #8a432e;
  --line: #d9ccbd;
  --status-bg: #ece0d0;
  --scene: #2c1a11;
  --page-width: 74rem;
  --gutter: clamp(1rem, 4vw, 3rem);
  --ui-font: Geist, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --display-font: "Songti SC", "Noto Serif CJK SC", "SimSun", serif;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font: 1rem/1.65 var(--ui-font);
}

img { display: block; max-inline-size: 100%; block-size: auto; }
a { color: inherit; text-underline-offset: 0.25em; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
p, figure, h1, h2 { margin: 0; }

.page-width {
  width: min(calc(100% - 2 * var(--gutter)), var(--page-width));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  inset: 0.5rem auto auto 0.5rem;
  z-index: 1;
  padding: 0.5rem 1rem;
  transform: translateY(-150%);
  background: var(--paper);
}

.skip-link:focus { transform: translateY(0); }

.site-header, .site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-header { min-height: 5.5rem; border-bottom: 1px solid var(--line); }

.wordmark, .nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  text-decoration: none;
}

.wordmark { gap: 0.75rem; font-size: 1.125rem; font-weight: 600; letter-spacing: 0.1em; }
.wordmark img { border-radius: 0.625rem; }
.nav-link { gap: 0.5rem; font-size: 0.875rem; color: var(--muted); }
.nav-link:hover { text-decoration: underline; }
.nav-link span { color: var(--accent); }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  padding-block: 2.5rem 3rem;
}

.hero-copy { padding-block: 1.5rem 3rem; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.eyebrow::before { content: ""; width: 1.5rem; height: 1px; background: currentColor; }

h1 {
  margin-block: 1.5rem;
  font: 600 clamp(2.25rem, 5.3vw, 4.5rem)/1.18 var(--display-font);
  letter-spacing: -0.035em;
}

.hero-description { color: var(--muted); font-size: 1.125rem; line-height: 1.8; text-wrap: pretty; }
.download { margin-block-start: 2rem; scroll-margin-top: 1rem; }

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 1rem;
  border-radius: 0.5rem;
  background: var(--status-bg);
  color: var(--accent);
  font-weight: 600;
}

.status span { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: currentColor; }
.download-note { margin-block-start: 0.5rem; color: var(--muted); font-size: 0.875rem; }
.download:target .status { outline: 2px solid var(--accent); outline-offset: 4px; }

.scene {
  position: relative;
  isolation: isolate;
  display: grid;
  place-items: center;
  min-height: 0;
  padding: 1.5rem;
  overflow: hidden;
  aspect-ratio: 1.16;
  border-radius: 1.25rem;
  background: var(--scene);
}

.scene-image {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 41%;
  opacity: 0.57;
  filter: blur(2px);
}

.phone {
  width: min(42%, 13.25rem);
  padding: 0.25rem;
  border: 1px solid #a47d56;
  border-radius: 1.625rem;
  background: #171310;
  box-shadow: 0 1rem 2.5rem #130a06bb;
}

.phone img { width: 100%; border-radius: 1.3125rem; }

figcaption {
  margin-block-start: 0.75rem;
  color: var(--muted);
  font-size: 0.875rem;
  text-align: end;
  letter-spacing: 0.04em;
}

figcaption span { margin-inline: 0.375rem; color: var(--accent); }

.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
  padding-block: 2rem 2.5rem;
  border-top: 1px solid var(--line);
}

.features article + article { padding-inline-start: 2rem; border-inline-start: 1px solid var(--line); }
.features h2 { font: 600 1.5rem/1.35 var(--display-font); }
.features p { margin-block-start: 0.5rem; color: var(--muted); font-size: 0.9375rem; text-wrap: pretty; }

.site-footer {
  padding-block: 0.75rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.875rem;
}

.site-footer a { display: inline-flex; align-items: center; min-height: 2.75rem; }
.error-page { padding-block: 3rem 5rem; }

@media (max-width: 55rem) {
  .site-header { min-height: 4.5rem; }
  .hero { gap: 1.5rem; }
  .hero-copy { padding-block: 0 1.5rem; }
  .hero-description { font-size: 1rem; }
  .scene { padding: 1rem; }
  .features { gap: 1.25rem; }
  .features article + article { padding-inline-start: 1.25rem; }
  .wide-only { display: none; }
}

@media (max-width: 42rem) {
  .hero { grid-template-columns: minmax(0, 1fr); padding-block: 2rem; gap: 1.5rem; }
  .hero-copy { padding: 0; }
  h1 { font-size: clamp(2.25rem, 9.2vw, 3.75rem); margin-block: 1rem; }
  .download { margin-block-start: 1.25rem; }
  .scene { aspect-ratio: 1.12; }
  .phone { width: min(44%, 13.25rem); }
  .features { grid-template-columns: minmax(0, 1fr); gap: 1.25rem; padding-block: 1.5rem; }
  .features article + article { padding: 1.25rem 0 0; border: 0; border-top: 1px solid var(--line); }
}