:root {
  color-scheme: light;
  --ink: #172332;
  --muted: #617083;
  --line: #dfe5eb;
  --navy: #12385d;
  --navy-strong: #0c2946;
  --blue: #2868ad;
  --green: #147d64;
  --orange: #d7771d;
  --surface: #f4f6f8;
  --white: #ffffff;
  --content: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 50%;
  display: flex;
  width: min(calc(100% - 48px), var(--content));
  height: 82px;
  align-items: center;
  justify-content: space-between;
  transform: translateX(-50%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.24);
  color: var(--white);
}

.brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
}

.brand img {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 8px;
}

.brand span {
  display: grid;
  min-width: 0;
  gap: 3px;
}

.brand strong {
  font-size: 17px;
  line-height: 1.25;
}

.brand small {
  color: rgba(255, 255, 255, 0.7);
  font-size: 11px;
}

nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 14px;
}

nav > a:not(.header-download) {
  color: rgba(255, 255, 255, 0.84);
}

nav a:hover,
nav a:focus-visible {
  color: var(--white);
}

.header-download {
  display: inline-flex;
  height: 42px;
  align-items: center;
  gap: 8px;
  padding: 0 17px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 4px;
}

.hero {
  position: relative;
  display: flex;
  min-height: 720px;
  align-items: center;
  overflow: hidden;
  background: var(--navy-strong);
  color: var(--white);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 48px), var(--content));
  margin: 48px auto 0;
}

.eyebrow {
  margin: 0 0 15px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

.hero .eyebrow {
  color: #ffb662;
}

.hero h1 {
  max-width: 680px;
  margin: 0;
  font-size: 60px;
  line-height: 1.12;
}

.hero-copy {
  max-width: 660px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 20px;
  line-height: 1.8;
}

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

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 9px 22px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.25;
  transition: background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button small {
  display: block;
  margin-top: 2px;
  font-size: 10px;
  font-weight: 400;
  opacity: 0.76;
}

.button-primary {
  min-width: 252px;
  background: var(--orange);
  color: var(--white);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #bd6212;
}

.button-icon {
  display: inline-grid;
  width: 26px;
  height: 26px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.button-dark {
  min-width: 148px;
  background: var(--navy);
  color: var(--white);
}

.button-dark:hover,
.button-dark:focus-visible {
  background: var(--navy-strong);
}

.hero-note {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
}

.value-strip {
  display: grid;
  width: min(calc(100% - 48px), var(--content));
  margin: 0 auto;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
}

.value-strip div {
  min-width: 0;
  padding: 30px 28px;
  border-right: 1px solid var(--line);
}

.value-strip div:first-child {
  padding-left: 0;
}

.value-strip div:last-child {
  padding-right: 0;
  border-right: 0;
}

.value-strip strong,
.value-strip span {
  display: block;
}

.value-strip strong {
  margin-bottom: 7px;
  font-size: 15px;
}

.value-strip span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.features-section,
.workflow-section,
.final-cta {
  width: min(calc(100% - 48px), var(--content));
  margin-right: auto;
  margin-left: auto;
}

.section-heading h2,
.final-cta h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.28;
}

.section-heading > p:last-child,
.final-cta > div > p:last-child {
  max-width: 680px;
  margin: 17px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.features-section {
  padding: 92px 0;
}

.centered {
  text-align: center;
}

.centered > p:last-child {
  margin-right: auto;
  margin-left: auto;
}

.feature-grid {
  display: grid;
  margin-top: 42px;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card {
  min-width: 0;
  min-height: 232px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}

.feature-card:nth-child(2),
.feature-card:nth-child(5) {
  border-top-color: var(--green);
}

.feature-card:nth-child(3),
.feature-card:nth-child(6) {
  border-top-color: var(--orange);
}

.feature-number {
  color: var(--blue);
  font-size: 11px;
  font-weight: 700;
}

.feature-card h3 {
  margin: 18px 0 12px;
  font-size: 20px;
}

.feature-card p {
  min-height: 68px;
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

.feature-tag {
  display: inline-block;
  margin: 0 7px 6px 0;
  color: #426077;
  font-size: 11px;
}

.feature-tag::before {
  content: "·";
  margin-right: 5px;
  color: var(--green);
}

.workflow-section {
  padding: 92px 0;
}

.workflow {
  display: grid;
  margin: 42px 0 0;
  padding: 0;
  grid-template-columns: repeat(4, 1fr);
  list-style: none;
  border-top: 1px solid var(--line);
}

.workflow li {
  min-width: 0;
  padding: 28px 24px 0 0;
}

.workflow li > span {
  display: grid;
  width: 32px;
  height: 32px;
  margin-top: -17px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--white);
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
}

.workflow strong,
.workflow small {
  display: block;
}

.workflow strong {
  margin-top: 20px;
  font-size: 15px;
}

.workflow small {
  margin-top: 9px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.65;
}

.final-cta {
  display: flex;
  margin-top: 20px;
  margin-bottom: 76px;
  padding: 54px 0;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

footer {
  display: flex;
  min-height: 128px;
  padding: 28px max(24px, calc((100% - var(--content)) / 2));
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--navy-strong);
  color: var(--white);
}

.footer-brand img {
  width: 38px;
  height: 38px;
}

footer p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 11px;
}

@media (max-width: 900px) {
  .site-header {
    height: 72px;
  }

  nav > a:not(.header-download) {
    display: none;
  }

  .hero {
    min-height: 660px;
  }

  .hero h1 {
    font-size: 48px;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .workflow {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 38px;
  }
}

@media (max-width: 640px) {
  .site-header,
  .hero-content,
  .value-strip,
  .features-section,
  .workflow-section,
  .final-cta {
    width: min(calc(100% - 32px), var(--content));
  }

  .brand small {
    display: none;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .brand strong {
    font-size: 14px;
  }

  nav {
    gap: 0;
  }

  .header-download {
    height: 38px;
    padding: 0 11px;
    font-size: 12px;
  }

  .hero {
    min-height: 620px;
  }

  .hero-content {
    margin-top: 52px;
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero-copy {
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-actions,
  .hero-actions .button {
    width: 100%;
  }

  .value-strip {
    grid-template-columns: 1fr;
  }

  .value-strip div,
  .value-strip div:first-child,
  .value-strip div:last-child {
    padding: 20px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .value-strip div:last-child {
    border-bottom: 0;
  }

  .features-section,
  .workflow-section {
    padding-top: 70px;
    padding-bottom: 70px;
  }

  .section-heading h2,
  .final-cta h2 {
    font-size: 27px;
  }

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

  .feature-card {
    min-height: 0;
  }

  .feature-card p {
    min-height: 0;
  }

  .workflow {
    grid-template-columns: 1fr;
    row-gap: 38px;
  }

  .final-cta {
    align-items: stretch;
    flex-direction: column;
  }

  .final-cta .button {
    width: 100%;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button {
    transition: none;
  }
}