:root {
  color-scheme: light;
  --ink: #111318;
  --muted: #687080;
  --soft: #f6f7f9;
  --line: #e4e7ec;
  --blue: #256df0;
  --blue-dark: #164fc4;
  --white: #ffffff;
  --max: 1160px;
  --shadow: 0 32px 90px rgba(17, 19, 24, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 1120px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background:
    linear-gradient(180deg, #fbfbfa 0%, #ffffff 520px),
    var(--white);
  letter-spacing: 0;
}

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

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

button {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--max), calc(100% - 64px));
  margin: 0 auto;
  padding: 24px 0;
  background: rgba(251, 251, 250, 0.82);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.header-link,
.hero-actions,
.contact-list a,
.contact-list button {
  display: inline-flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 700;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.nav-links {
  gap: 36px;
  color: #4b5565;
  font-size: 14px;
}

.nav-links a,
.header-link,
.site-footer {
  transition: color 160ms ease;
}

.nav-links a:hover,
.header-link:hover {
  color: var(--blue);
}

.header-link {
  min-height: 40px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 650;
  background: rgba(255, 255, 255, 0.72);
}

main,
.site-footer {
  width: min(var(--max), calc(100% - 64px));
  margin: 0 auto;
}

.hero {
  display: grid;
  justify-items: center;
  padding: 104px 0 72px;
  text-align: center;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: 136px;
  line-height: 0.88;
  letter-spacing: 0;
}

.hero-line {
  margin: 30px 0 0;
  font-size: 42px;
  font-weight: 750;
  line-height: 1.14;
}

.hero-copy {
  max-width: 690px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.75;
}

.hero-actions {
  gap: 14px;
  margin-top: 34px;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 720;
  line-height: 1;
  white-space: nowrap;
}

.primary-button {
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 14px 30px rgba(37, 109, 240, 0.18);
}

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

.secondary-button {
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
}

.hero-meta {
  margin: 20px 0 0;
  color: #87909f;
  font-size: 14px;
}

.product-shot {
  overflow: hidden;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eef2f7;
  box-shadow: var(--shadow);
}

.product-shot img {
  width: 100%;
  height: auto;
}

.product-section {
  padding: 120px 0;
}

.section-title {
  max-width: 680px;
  margin-bottom: 44px;
}

.section-title h2,
.download-panel h2,
.contact-panel h2 {
  margin: 0;
  font-size: 58px;
  line-height: 1.05;
  letter-spacing: 0;
}

.section-title p:not(.eyebrow),
.download-panel p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.7;
}

.feature-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.feature-row article {
  min-height: 230px;
  padding: 34px 34px 38px 0;
}

.feature-row article + article {
  padding-left: 34px;
  border-left: 1px solid var(--line);
}

.feature-row span {
  color: #98a2b3;
  font-size: 13px;
  font-weight: 800;
}

.feature-row h3 {
  margin: 42px 0 14px;
  font-size: 28px;
  line-height: 1.16;
}

.feature-row p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.split-section {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 18px;
  padding-bottom: 104px;
}

.download-panel,
.contact-panel {
  min-height: 430px;
  padding: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.download-panel {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.download-panel .primary-button {
  margin-top: auto;
}

.contact-list {
  display: grid;
  gap: 0;
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.contact-list a,
.contact-list button {
  justify-content: space-between;
  width: 100%;
  min-height: 72px;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.contact-list span {
  color: var(--muted);
  font-size: 14px;
}

.contact-list strong {
  font-size: 18px;
  font-weight: 720;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 30px 0 46px;
  color: #8a93a3;
  font-size: 14px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 30;
  min-width: 128px;
  padding: 12px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 10px);
  transition:
    opacity 160ms ease,
    transform 160ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
  }
}