:root {
  --paper: #f7f6f4;
  --surface: #ffffff;
  --surface-soft: #f0efec;
  --ink: #211f1d;
  --ink-soft: #514d48;
  --muted: #77716b;
  --line: #dedbd6;
  --brand: #e9653d;
  --brand-deep: #c94825;
  --brand-wash: #fbe8e1;
  --success: #38745a;
  --night: #282522;
  --night-soft: #37322e;
  --white: #ffffff;
  --wrap: 1020px;
  --header-h: 81px;
  --h1: 50px;
  --h2: 58px;
  --h3: 18px;
  --body: 16px;
  --lead: 19px;
  --small: 14px;
  --micro: 12px;
  --radius-control: 6px;
  --radius-card: 10px;
  --radius-panel: 14px;
  --s1: 8px;
  --s2: 16px;
  --s3: 24px;
  --s4: 40px;
  --s5: 64px;
  --s6: 80px;
  --s7: 96px;
  --shadow-soft: 0 24px 64px rgba(58, 43, 35, 0.11), 0 4px 16px rgba(58, 43, 35, 0.06);
  --font-sans: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--body);
  font-weight: 400;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
body.reader-open {
  overflow: hidden;
}
img,
svg {
  display: block;
  max-width: 100%;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input {
  font: inherit;
}
button,
a {
  -webkit-tap-highlight-color: transparent;
}
button {
  cursor: pointer;
}
[hidden] {
  display: none !important;
}
.wrap {
  width: min(calc(100% - 48px), var(--wrap));
  margin-inline: auto;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.eyebrow {
  margin: 0 0 var(--s2);
  color: var(--ink-soft);
  font-size: var(--small);
  font-weight: 500;
  letter-spacing: 0.01em;
}
h1,
h2,
h3,
p {
  margin-top: 0;
}
h1,
h2,
h3 {
  text-wrap: balance;
}
h1 {
  margin-bottom: var(--s3);
  font-size: clamp(44px, 4.2vw, var(--h1));
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.035em;
  font-synthesis: none;
}
h1 em,
h1 span {
  font-weight: inherit;
}
h1 em {
  color: var(--brand);
  font-style: normal;
}
h2 {
  margin-bottom: var(--s3);
  font-size: 32px;
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.035em;
}
h2 em {
  color: var(--brand);
  font-style: normal;
}
h3 {
  margin-bottom: var(--s2);
  font-size: var(--h3);
  font-weight: 600;
  line-height: 1.4;
}
p {
  margin-bottom: var(--s3);
  color: var(--ink-soft);
}
.section {
  padding-block: var(--s6);
}
.section-intro {
  max-width: 680px;
  margin-bottom: var(--s4);
  font-size: var(--lead);
  line-height: 1.65;
}
.button {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s1);
  padding: 9px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  background: var(--brand);
  color: var(--ink);
  box-shadow: 0 7px 16px rgba(201, 72, 37, 0.16);
  font-size: var(--small);
  font-weight: 500;
  line-height: 1.25;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, color 160ms ease;
}
.button:hover {
  transform: translateY(-2px);
  background: var(--brand-deep);
  color: var(--white);
  box-shadow: 0 10px 22px rgba(201, 72, 37, 0.2);
}
.button-secondary {
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 4px 12px rgba(58, 43, 35, 0.06);
}
.button-secondary:hover {
  background: var(--surface-soft);
  color: var(--ink);
}
.text-link {
  color: var(--brand-deep);
  font-weight: 500;
}
@media (max-width: 720px) {
  :root {
    --header-h: 68px;
    --h1: 38px;
    --h2: 38px;
    --s5: 48px;
    --s6: 64px;
    --s7: 80px;
  }
  .wrap {
    width: min(calc(100% - 32px), var(--wrap));
  }
  h1 {
    font-size: 38px;
    font-weight: 400;
    line-height: 1.16;
  }
  h2 {
    font-size: 38px;
    font-weight: 500;
    line-height: 1.14;
  }
  .section-intro {
    font-size: 17px;
  }
}