:root {
  color-scheme: light;
  --ink: #10233d;
  --muted: #5f6f83;
  --line: #dce5ef;
  --blue: #1262d6;
  --blue-dark: #0a3d8f;
  --sky: #58b9ea;
  --surface: #f4f8fc;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(10, 61, 143, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

.site-header,
.hero,
.section,
.security-section,
.about-section,
footer {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.site-header {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(220, 229, 239, 0.75);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 13px 13px 13px 4px;
  color: var(--white);
  background: linear-gradient(145deg, var(--blue-dark), var(--blue) 55%, var(--sky));
  box-shadow: 0 9px 24px rgba(18, 98, 214, 0.25);
  transform: skew(-7deg);
}

.brand-mark span {
  font-size: 22px;
  font-weight: 850;
  line-height: 1;
  transform: skew(7deg);
}

nav {
  display: flex;
  align-items: center;
  gap: 34px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

nav a:hover,
nav a:focus-visible,
.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--blue);
}

.hero {
  position: relative;
  min-height: 640px;
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  align-items: center;
  gap: 72px;
  padding-block: 78px 92px;
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  width: 520px;
  height: 520px;
  top: 20px;
  right: -130px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(88, 185, 234, 0.23), rgba(18, 98, 214, 0.05) 55%, transparent 72%);
}

.eyebrow,
.section-kicker {
  margin: 0 0 18px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
}

.eyebrow span {
  width: 24px;
  height: 2px;
  background: var(--blue);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 26px;
  font-size: clamp(44px, 5.2vw, 72px);
  line-height: 1.15;
  letter-spacing: -0.04em;
}

h1 strong {
  color: var(--blue);
  font-weight: 800;
}

.hero-description {
  max-width: 590px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--white);
  border-color: var(--blue);
  background: var(--blue);
  box-shadow: 0 13px 28px rgba(18, 98, 214, 0.24);
}

.button-secondary {
  background: var(--white);
}

.access-note {
  margin: 22px 0 0;
  color: #718096;
  font-size: 13px;
}

.hero-panel {
  padding: 28px;
  border: 1px solid rgba(220, 229, 239, 0.85);
  border-radius: 28px 28px 28px 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  font-weight: 700;
}

.panel-brand,
.status {
  display: flex;
  align-items: center;
  gap: 9px;
}

.panel-brand i,
.status i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--blue);
}

.status {
  color: #25725a;
  font-size: 12px;
}

.status i {
  background: #2eb67d;
  box-shadow: 0 0 0 5px rgba(46, 182, 125, 0.1);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.metric-grid article {
  min-height: 158px;
  padding: 20px;
  border-radius: 18px;
  background: var(--surface);
}

.metric-grid article:first-child {
  color: var(--white);
  background: linear-gradient(145deg, var(--blue-dark), var(--blue));
}

.metric-icon {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  margin-bottom: 20px;
  border: 1px solid rgba(18, 98, 214, 0.2);
  border-radius: 10px;
  color: var(--blue);
  background: var(--white);
  font-size: 11px;
  font-weight: 800;
}

.metric-grid h2 {
  margin-bottom: 4px;
  font-size: 17px;
}

.metric-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
}

.metric-grid article:first-child p {
  color: rgba(255, 255, 255, 0.76);
}

.section {
  padding-block: 100px;
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 690px;
  margin-bottom: 48px;
}

.section-heading h2,
.security-copy h2,
.about-section h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.25;
}

.section-heading > p:last-child,
.security-copy > p:last-child {
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  min-height: 280px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 20px 20px 20px 6px;
}

.feature-number {
  display: inline-block;
  margin-bottom: 54px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 21px;
}

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

.security-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 90px;
  padding: 76px;
  border-radius: 30px 30px 30px 8px;
  color: var(--white);
  background: linear-gradient(135deg, #092f6b, #0f57bc 62%, #1372d9);
  box-shadow: var(--shadow);
}

.security-section .section-kicker,
.security-copy > p:last-child {
  color: rgba(255, 255, 255, 0.76);
}

.security-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.security-list li {
  padding: 17px 20px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 14px;
  color: rgba(255, 255, 255, 0.78);
  background: rgba(255, 255, 255, 0.07);
  font-size: 14px;
}

.security-list span {
  display: inline-block;
  min-width: 88px;
  color: var(--white);
  font-weight: 750;
}

.about-section {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 72px;
  padding-block: 110px;
}

.company-details {
  margin: 0;
  border-top: 1px solid var(--line);
}

.company-details div {
  display: grid;
  grid-template-columns: 145px 1fr;
  gap: 18px;
  padding-block: 19px;
  border-bottom: 1px solid var(--line);
}

.company-details dt {
  color: var(--muted);
  font-size: 14px;
}

.company-details dd {
  margin: 0;
  font-weight: 650;
}

footer {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 30px;
  padding-block: 46px;
  border-top: 1px solid var(--line);
}

.footer-brand {
  margin-bottom: 14px;
}

footer p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
}

.footer-links {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: 13px;
}

.copyright {
  grid-column: 1 / -1;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 52px;
    padding-block: 62px 78px;
  }

  .hero-copy {
    max-width: 690px;
  }

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

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

  .feature-number {
    margin-bottom: 26px;
  }

  .security-section,
  .about-section {
    grid-template-columns: 1fr;
    gap: 44px;
  }
}

@media (max-width: 640px) {
  .site-header,
  .hero,
  .section,
  .security-section,
  .about-section,
  footer {
    width: min(100% - 30px, 1180px);
  }

  .site-header {
    min-height: 72px;
  }

  nav {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-block: 54px 70px;
  }

  h1 {
    font-size: 42px;
  }

  .hero-description {
    font-size: 16px;
  }

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

  .hero-panel {
    padding: 18px;
    border-radius: 22px 22px 22px 7px;
  }

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

  .metric-grid article {
    min-height: 138px;
  }

  .section {
    padding-block: 72px;
  }

  .security-section {
    padding: 42px 24px;
    border-radius: 24px 24px 24px 7px;
  }

  .security-list span {
    display: block;
    margin-bottom: 3px;
  }

  .about-section {
    padding-block: 78px;
  }

  .company-details div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  footer {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .copyright {
    grid-column: auto;
  }
}

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

  .button {
    transition: none;
  }
}