:root {
  color-scheme: light;
  --ink: #17232b;
  --muted: #5e6d76;
  --line: #dce5e8;
  --surface: #ffffff;
  --soft: #f3f7f7;
  --teal: #087f70;
  --teal-dark: #056458;
  --blue: #2466c8;
  --coral: #e35d4f;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: Arial, "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
}

.site-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1160px, calc(100% - 48px));
  min-height: 78px;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  color: var(--ink);
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  border-radius: 8px;
}

nav {
  display: flex;
  gap: 30px;
}

nav a,
footer a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

nav a:hover,
footer a:hover {
  color: var(--teal);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 72px;
  align-items: center;
  width: min(1160px, calc(100% - 48px));
  min-height: 640px;
  padding: 76px 0 92px;
}

.hero,
.content-band,
.privacy-band,
footer {
  margin-right: auto;
  margin-left: auto;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 720px;
  margin: 0;
  font-size: 72px;
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 680px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.85;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  padding: 0 20px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
}

.button-primary {
  color: #fff;
  background: var(--teal);
}

.button-primary:hover {
  background: var(--teal-dark);
}

.button-secondary {
  color: var(--ink);
  background: #fff;
  border-color: #bfcdd2;
}

.button-secondary:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.scope-note {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.hero-visual {
  display: flex;
  min-height: 390px;
  align-items: center;
  justify-content: center;
  background: #edf5f4;
  border: 1px solid #d3e3e0;
}

.visual-panel {
  display: flex;
  width: min(310px, calc(100% - 48px));
  padding: 38px 28px 26px;
  flex-direction: column;
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 20px 54px rgba(31, 66, 76, 0.12);
}

.visual-panel img {
  max-width: 54%;
  height: auto;
  border-radius: 24px;
}

.status-line {
  display: flex;
  width: 100%;
  margin-top: 30px;
  padding-top: 20px;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.status-dot {
  width: 9px;
  height: 9px;
  flex: 0 0 9px;
  background: var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(8, 127, 112, 0.12);
}

.content-band {
  width: 100%;
  padding: 86px max(24px, calc((100% - 1160px) / 2));
  background: var(--soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: end;
}

h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.3;
  letter-spacing: 0;
}

.section-heading > p:last-child,
.privacy-band > p {
  margin: 0;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 58px;
  border-top: 1px solid #cbd8dc;
}

.feature-grid article {
  min-width: 0;
  padding: 28px 32px 0 0;
}

.feature-grid article + article {
  padding-left: 32px;
  border-left: 1px solid #cbd8dc;
}

.feature-number {
  color: var(--coral);
  font-size: 13px;
  font-weight: 700;
}

h3 {
  margin: 14px 0 8px;
  font-size: 19px;
  letter-spacing: 0;
}

.feature-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.privacy-band {
  display: grid;
  grid-template-columns: 1.1fr 1fr auto;
  gap: 54px;
  align-items: end;
  width: min(1160px, calc(100% - 48px));
  padding: 82px 0;
}

.privacy-band a {
  color: var(--blue);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1160px, calc(100% - 48px));
  min-height: 90px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

footer div {
  display: flex;
  gap: 24px;
}

@media (max-width: 820px) {
  .site-header {
    width: min(100% - 32px, 720px);
  }

  .site-header nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 42px;
    width: min(100% - 32px, 720px);
    min-height: auto;
    padding: 58px 0 64px;
  }

  h1 {
    font-size: 46px;
  }

  .hero-copy {
    font-size: 17px;
  }

  .hero-visual {
    min-height: 330px;
  }

  .section-heading,
  .privacy-band {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .content-band {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    margin-top: 38px;
  }

  .feature-grid article,
  .feature-grid article + article {
    padding: 24px 0;
    border-left: 0;
    border-bottom: 1px solid #cbd8dc;
  }

  .privacy-band,
  footer {
    width: min(100% - 32px, 720px);
  }

  .privacy-band {
    padding: 64px 0;
  }
}

@media (max-width: 520px) {
  .brand span {
    font-size: 15px;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 28px;
  }

  .actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  footer {
    padding: 22px 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}