:root {
  color-scheme: light dark;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", "PingFang SC", sans-serif;
  color: #29383f;
  background: #eef1f2;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: #eef1f2;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 88% 3%, rgb(88 111 126 / 13%), transparent 26rem),
    linear-gradient(180deg, #f4f6f7 0%, #eef1f2 100%);
}

a {
  color: inherit;
}

.shell {
  width: min(1120px, calc(100% - 48px));
  min-height: 100vh;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.nav {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #d5dce0;
}

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

.brand-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  color: #f8faf9;
  background: #586f7e;
  border-radius: 7px;
  font-family: Georgia, "Songti SC", "SimSun", serif;
  font-size: 19px;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.1;
}

.brand-copy strong {
  font-size: 14px;
  letter-spacing: -0.01em;
}

.brand-copy small {
  color: #71818a;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.11em;
}

.nav-link {
  color: #4e616b;
  font-size: 13px;
  font-weight: 700;
  text-underline-offset: 5px;
  text-decoration-thickness: 1px;
}

.hero {
  max-width: 850px;
  padding: 106px 0 88px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  color: #586f7e;
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow span {
  width: 24px;
  height: 1px;
  background: currentColor;
}

h1 {
  margin: 0;
  color: #29383f;
  font-family: Georgia, "Songti SC", "SimSun", serif;
  font-size: clamp(52px, 7.5vw, 88px);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.lead {
  max-width: 650px;
  margin: 32px 0 0;
  color: #4e616b;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.8;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 34px;
}

.button {
  min-height: 44px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #f8faf9;
  background: #586f7e;
  border: 1px solid #586f7e;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 140ms ease, transform 140ms ease;
}

.button:hover {
  background: #465d6c;
  transform: translateY(-1px);
}

.availability {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #71818a;
  font-size: 13px;
}

.availability span {
  width: 7px;
  height: 7px;
  background: #586f7e;
  border-radius: 50%;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: #fafbfb;
  border: 1px solid #d5dce0;
  border-radius: 11px;
  box-shadow: 0 1px 2px rgb(39 55 64 / 5%), 0 3px 9px rgb(39 55 64 / 4%);
  overflow: hidden;
}

.feature-card {
  min-height: 254px;
  padding: 28px 28px 30px;
}

.feature-card + .feature-card {
  border-left: 1px solid #d5dce0;
}

.feature-number {
  color: #98a4aa;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 12px;
}

.feature-icon {
  width: 34px;
  height: 34px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 28px;
  color: #586f7e;
  background: #e5eaed;
  border-radius: 7px;
}

.feature-icon-book span {
  width: 9px;
  height: 14px;
  border: 1.5px solid currentColor;
}

.feature-icon-book span:first-child {
  border-radius: 3px 0 0 3px;
}

.feature-icon-book span:last-child {
  border-radius: 0 3px 3px 0;
}

.feature-icon-anchor span:first-child {
  width: 14px;
  height: 10px;
  border: 1.5px solid currentColor;
  border-top: 0;
  border-radius: 0 0 9px 9px;
}

.feature-icon-anchor span:last-child {
  width: 1.5px;
  height: 16px;
  position: absolute;
  top: 8px;
  background: currentColor;
}

.feature-icon-local span:first-child {
  width: 14px;
  height: 14px;
  border: 1.5px solid currentColor;
  border-radius: 3px;
}

.feature-icon-local span:last-child {
  width: 6px;
  height: 1.5px;
  position: absolute;
  top: 16px;
  background: currentColor;
}

.feature-card h2 {
  margin: 20px 0 9px;
  color: #29383f;
  font-family: Georgia, "Songti SC", "SimSun", serif;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.feature-card p {
  margin: 0;
  color: #4e616b;
  font-size: 14px;
  line-height: 1.75;
}

footer {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: #71818a;
  font-size: 11px;
  letter-spacing: 0.05em;
}

.brand:focus-visible,
.nav-link:focus-visible,
.button:focus-visible {
  outline: 3px solid rgb(88 111 126 / 35%);
  outline-offset: 4px;
}

@media (max-width: 720px) {
  .shell {
    width: min(100% - 32px, 1120px);
  }

  .nav {
    min-height: 72px;
  }

  .hero {
    padding: 72px 0 64px;
  }

  h1 {
    font-size: clamp(45px, 14vw, 66px);
  }

  .lead {
    margin-top: 26px;
  }

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

  .feature-card {
    min-height: 0;
    padding: 25px 24px 27px;
  }

  .feature-card + .feature-card {
    border-top: 1px solid #d5dce0;
    border-left: 0;
  }

  .feature-icon {
    margin-top: 20px;
  }

  .feature-card h2 {
    margin-top: 16px;
  }

  footer {
    min-height: 0;
    padding: 24px 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }
}

@media (prefers-color-scheme: dark) {
  :root,
  html {
    color: #e8edf0;
    background: #1e282d;
  }

  body {
    background:
      radial-gradient(circle at 88% 3%, rgb(119 151 169 / 15%), transparent 26rem),
      linear-gradient(180deg, #253036 0%, #1e282d 100%);
  }

  .nav {
    border-color: #3c4a51;
  }

  .brand-mark,
  .button {
    color: #1e282d;
    background: #b9c8cf;
    border-color: #b9c8cf;
  }

  .button:hover {
    background: #d3dfe4;
  }

  .brand-copy strong,
  h1,
  .feature-card h2 {
    color: #e8edf0;
  }

  .brand-copy small,
  .nav-link,
  .lead,
  .availability,
  .feature-card p,
  footer {
    color: #aebdc4;
  }

  .eyebrow,
  .availability span {
    color: #b9c8cf;
  }

  .availability span {
    background: #b9c8cf;
  }

  .features {
    background: #263238;
    border-color: #3c4a51;
    box-shadow: none;
  }

  .feature-card + .feature-card {
    border-color: #3c4a51;
  }

  .feature-number {
    color: #82939c;
  }

  .feature-icon {
    color: #b9c8cf;
    background: #34434b;
  }
}

@media (prefers-reduced-motion: reduce) {
  .button {
    transition: none;
  }
}