:root {
  --bg: #f5f7f5;
  --paper: #fff;
  --wash: #eef2ef;
  --ink: #203b35;
  --muted: #73847d;
  --line: #dce5df;
  --accent: #17634d;
}
html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101a19;
  --paper: #152320;
  --wash: #1b2d27;
  --ink: #e0eae3;
  --muted: #9cafaa;
  --line: #30473c;
  --accent: #76c4a6;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 95px;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Microsoft YaHei",
    sans-serif;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  cursor: pointer;
}
a,
button,
summary {
  outline-offset: 5px;
}
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
}
.container {
  max-width: 1224px;
  margin: auto;
  padding-inline: 32px;
}
.site-header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}
.site-header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
  gap: 24px;
}
.brand {
  display: flex;
  gap: 11px;
  align-items: center;
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.035em;
}
.brand img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}
.brand small {
  display: block;
  font-size: 10px;
  color: var(--muted);
  font-weight: 400;
  letter-spacing: 0.12em;
  margin-top: 3px;
}
.site-links {
  display: flex;
  gap: 30px;
  font-size: 13px;
  color: var(--muted);
}
.site-links a:hover,
.text-link:hover {
  color: var(--accent);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 15px;
}
#theme {
  border: 0;
  background: none;
  color: var(--muted);
  font-size: 25px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 15px 23px;
  background: var(--accent);
  color: var(--paper);
  border-radius: 7px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.15s;
}
.button:hover {
  transform: translateY(-2px);
}
.button.small {
  padding: 10px 15px;
  font-size: 12px;
  gap: 12px;
}
.hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
  padding-block: 90px 104px;
}
.eyebrow {
  font-family: ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent);
}
h1,
h2,
h3,
p {
  margin: 0;
}
h1 {
  font-size: 43px;
  line-height: 1.45;
  letter-spacing: -0.05em;
  font-weight: 650;
  margin: 24px 0;
}
h1 span {
  color: var(--muted);
}
.hero-copy > p {
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
  max-width: 445px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 32px 0;
}
.text-link {
  font-size: 12px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 10px;
  color: var(--muted);
}
.hero-meta span:before {
  content: "·";
  margin-right: 7px;
  color: var(--accent);
}
.example {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 20px 55px #16382c08;
  overflow: hidden;
}
.example-top {
  display: flex;
  justify-content: space-between;
  padding: 17px 23px;
  border-bottom: 1px solid var(--line);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.05em;
}
.example-tag {
  color: var(--accent);
}
.example-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px;
}
.example-title small {
  color: var(--muted);
  font-size: 11px;
}
.example-title h2 {
  font-size: 24px;
  margin-top: 8px;
  letter-spacing: -0.03em;
}
.strategy {
  background: var(--wash);
  font-size: 12px;
  padding: 7px 10px;
  border-radius: 5px;
  font-family: ui-monospace, monospace;
  color: var(--accent);
}
.quote-strip {
  display: flex;
  justify-content: space-between;
  background: var(--wash);
  padding: 14px 24px;
}
.quote-strip small {
  display: block;
  color: var(--muted);
  font-size: 10px;
  margin-bottom: 7px;
}
.quote-strip strong {
  font-size: 16px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.example-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 25px 20px;
  padding: 26px 24px;
}
.example-metrics span,
.example-metrics strong,
.example-metrics small {
  display: block;
}
.example-metrics span {
  font-size: 11px;
  color: var(--muted);
}
.example-metrics strong {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 7px 0;
  font-variant-numeric: tabular-nums;
}
.example-metrics small {
  font-size: 9px;
  line-height: 1.6;
  color: var(--muted);
}
.example-bottom {
  font-size: 10px;
  color: var(--muted);
  background: var(--wash);
  padding: 14px 24px;
  line-height: 1.8;
}
.flow-section,
.pricing-section {
  background: var(--paper);
  padding: 72px 0;
  border-block: 1px solid var(--line);
}
.section-heading {
  margin-bottom: 42px;
}
.section-heading h2,
.research-section h2,
.final-cta h2 {
  font-size: 30px;
  line-height: 1.6;
  letter-spacing: -0.04em;
  margin: 16px 0 10px;
  font-weight: 600;
}
.section-heading > p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.8;
}
.flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}
.step {
  display: block;
  color: var(--accent);
  font-size: 10px;
  font-family: ui-monospace, monospace;
  border-top: 1px solid var(--line);
  padding-top: 17px;
  letter-spacing: 0.1em;
}
.flow-grid h3 {
  font-size: 18px;
  margin: 20px 0 13px;
  font-weight: 600;
}
.flow-grid p {
  font-size: 12px;
  line-height: 1.95;
  color: var(--muted);
  min-height: 95px;
}
.flow-grid a {
  display: inline-block;
  font-size: 11px;
  color: var(--accent);
  margin-top: 19px;
}
.research-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 95px;
  padding-block: 84px;
}
.research-section > div > p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.95;
  margin: 16px 0 25px;
  max-width: 415px;
}
.principles > div {
  border-bottom: 1px solid var(--line);
  padding: 24px 0;
  display: flex;
  gap: 28px;
}
.principles > div:first-child {
  border-top: 1px solid var(--line);
}
.principles span {
  font-size: 12px;
  color: var(--accent);
  min-width: 27px;
  padding-top: 2px;
}
.principles p {
  color: var(--muted);
  line-height: 1.9;
  font-size: 12px;
}
.plan-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.plan-grid article {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
}
.plan-grid article:nth-child(2) {
  border-color: var(--accent);
}
.plan-grid h3 {
  font-size: 18px;
  font-weight: 600;
}
.plan-price {
  font-size: 35px;
  font-weight: 600;
  margin: 18px 0 6px;
  letter-spacing: -0.04em;
}
.plan-price small {
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
  letter-spacing: 0;
}
.plan-year {
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 20px;
}
.plan-grid ul {
  margin: 22px 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  color: var(--muted);
  line-height: 2.5;
}
.plan-grid li:before {
  content: "✓";
  color: var(--accent);
  margin-right: 10px;
}
.plan-grid .button {
  width: 100%;
  margin-top: 8px;
}
.pricing-note {
  font-size: 10px;
  color: var(--muted);
  margin-top: 22px;
  line-height: 1.8;
}
.faq-section {
  padding-block: 76px;
}
.faq-section details {
  border-top: 1px solid var(--line);
  padding: 20px 0;
}
.faq-section details:last-child {
  border-bottom: 1px solid var(--line);
}
.faq-section summary {
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
}
.faq-section summary:after {
  content: "+";
  float: right;
  color: var(--muted);
}
.faq-section details[open] summary:after {
  content: "−";
}
.faq-section details p {
  font-size: 12px;
  color: var(--muted);
  line-height: 2;
  margin-top: 17px;
  max-width: 920px;
}
.contact {
  display: flex;
  gap: 24px;
  align-items: center;
}
.contact img {
  width: 115px;
  height: 115px;
  object-fit: cover;
  margin-top: 17px;
}
.final-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  padding-block: 20px 76px;
  gap: 30px;
}
.final-cta p {
  font-size: 13px;
  color: var(--muted);
}
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 32px;
  display: flex;
  justify-content: space-between;
  gap: 30px;
}
.site-footer p {
  font-size: 10px;
  color: var(--muted);
  line-height: 1.9;
  margin-top: 12px;
}
.site-footer > div:last-child {
  display: flex;
  align-items: flex-end;
  flex-direction: column;
  gap: 9px;
  font-size: 10px;
  color: var(--muted);
}
@media (max-width: 1000px) {
  .hero {
    gap: 30px;
  }
  h1 {
    font-size: 35px;
  }
  .hero-meta {
    gap: 10px;
  }
  .research-section {
    gap: 45px;
  }
  .flow-grid {
    gap: 20px;
  }
  .flow-grid h3 {
    font-size: 16px;
  }
}
@media (max-width: 720px) {
  .container {
    padding-inline: 20px;
  }
  .site-header nav {
    height: 70px;
    gap: 10px;
  }
  .site-links {
    display: none;
  }
  .brand {
    font-size: 17px;
  }
  .brand small {
    font-size: 8px;
  }
  .brand img {
    width: 28px;
    height: 28px;
  }
  .nav-actions {
    gap: 8px;
  }
  .button.small {
    padding: 9px 11px;
    font-size: 11px;
  }
  .hero {
    grid-template-columns: 1fr;
    padding-block: 42px 48px;
    gap: 35px;
  }
  h1 {
    font-size: 31px;
    margin: 19px 0;
  }
  .hero-copy > p {
    font-size: 14px;
  }
  .hero-actions {
    gap: 20px;
  }
  .hero-meta {
    font-size: 9px;
  }
  .example-title h2 {
    font-size: 21px;
  }
  .example-metrics strong {
    font-size: 22px;
  }
  .section-heading h2,
  .research-section h2,
  .final-cta h2 {
    font-size: 25px;
  }
  .flow-grid {
    grid-template-columns: 1fr 1fr;
    gap: 27px 18px;
  }
  .flow-grid p {
    min-height: 100px;
  }
  .flow-section,
  .pricing-section {
    padding: 45px 0;
  }
  .research-section {
    grid-template-columns: 1fr;
    padding-block: 48px;
    gap: 28px;
  }
  .plan-grid {
    grid-template-columns: 1fr;
  }
  .plan-grid ul {
    margin: 12px 0;
  }
  .plan-grid li {
    font-size: 12px;
  }
  .plan-price {
    margin-top: 13px;
  }
  .faq-section {
    padding-block: 45px;
  }
  .final-cta {
    flex-direction: column;
    align-items: flex-start;
    padding-bottom: 45px;
    gap: 18px;
  }
  .site-footer {
    flex-direction: column;
  }
  .site-footer > div:last-child {
    align-items: flex-start;
  }
  .example-top,
  .example-title,
  .quote-strip,
  .example-metrics,
  .example-bottom {
    padding-inline: 20px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .button {
    transition: none;
  }
}