:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-soft: #eef5ff;
  --text: #172033;
  --muted: #65718a;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #14b8a6;
  --border: #dbe4f0;
  --shadow: 0 24px 70px rgba(23, 32, 51, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  background: var(--bg);
}

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

button,
input,
textarea {
  font: inherit;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.section {
  padding: 96px 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(219, 228, 240, 0.7);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  font-size: 20px;
  font-weight: 800;
}

.brand-mark {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #ffffff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 14px;
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.25);
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
  color: var(--muted);
  font-weight: 600;
}

.nav-links a:hover {
  color: var(--primary);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--text);
}

.hero {
  position: relative;
  overflow: hidden;
  padding-top: 118px;
  background:
    radial-gradient(circle at 12% 18%, rgba(20, 184, 166, 0.22), transparent 30%),
    radial-gradient(circle at 88% 8%, rgba(37, 99, 235, 0.2), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: 64px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 660px;
  margin-bottom: 24px;
  font-size: clamp(42px, 6vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.hero-text,
.section-text {
  max-width: 620px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 36px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  font-weight: 800;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.button.primary {
  color: #ffffff;
  background: var(--primary);
  box-shadow: 0 16px 32px rgba(37, 99, 235, 0.28);
}

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

.button.secondary {
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 620px;
}

.hero-metrics div {
  padding: 18px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--border);
  border-radius: 22px;
}

.hero-metrics strong,
.hero-metrics span {
  display: block;
}

.hero-metrics strong {
  font-size: 20px;
}

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

.product-card {
  position: relative;
}

.product-card::before {
  position: absolute;
  inset: -26px;
  content: "";
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.22), rgba(20, 184, 166, 0.2));
  border-radius: 42px;
  filter: blur(8px);
}

.app-window {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid rgba(219, 228, 240, 0.8);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.window-bar {
  display: flex;
  gap: 8px;
  padding: 18px;
  background: #172033;
}

.window-bar span {
  width: 12px;
  height: 12px;
  background: #ff5f57;
  border-radius: 50%;
}

.window-bar span:nth-child(2) {
  background: #ffbd2e;
}

.window-bar span:nth-child(3) {
  background: #28c840;
}

.window-body {
  display: grid;
  grid-template-columns: 128px 1fr;
  min-height: 430px;
}

.window-body aside {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 22px;
  color: #ffffff;
  background: #304156;
}

.window-body aside span {
  height: 14px;
  background: rgba(255, 255, 255, 0.24);
  border-radius: 999px;
}

.window-body aside .active {
  background: var(--accent);
}

.dashboard {
  padding: 24px;
}

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

.dash-card {
  padding: 18px;
  background: var(--surface-soft);
  border-radius: 18px;
}

.dash-card small,
.dash-card strong {
  display: block;
}

.dash-card small {
  color: var(--muted);
}

.label-preview {
  margin-top: 22px;
  padding: 28px;
  background: #ffffff;
  border: 1px dashed #9fb4d4;
  border-radius: 22px;
  box-shadow: inset 0 0 0 8px #f7fafc;
}

.tag {
  display: inline-flex;
  padding: 6px 12px;
  margin-bottom: 18px;
  color: var(--primary);
  font-weight: 800;
  background: var(--surface-soft);
  border-radius: 999px;
}

.barcode {
  height: 82px;
  margin-bottom: 20px;
  background: repeating-linear-gradient(
    90deg,
    #172033 0 3px,
    transparent 3px 8px,
    #172033 8px 10px,
    transparent 10px 16px
  );
  border-radius: 8px;
}

.label-preview p {
  color: var(--muted);
}

.section-heading {
  max-width: 680px;
  margin-bottom: 42px;
}

.feature-grid,
.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card,
.scene-grid article,
.pricing-card,
.contact-form,
.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: 0 18px 44px rgba(23, 32, 51, 0.06);
}

.feature-card {
  padding: 28px;
}

.feature-card p,
.scene-grid p,
.pricing-card p,
.contact-grid p,
.faq p {
  color: var(--muted);
}

.icon {
  display: inline-flex;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: #ffffff;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 16px;
}

.muted {
  background: #edf4fb;
}

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.steps {
  display: grid;
  gap: 18px;
  padding: 0;
  margin: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  position: relative;
  padding: 24px 24px 24px 76px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
}

.steps li::before {
  position: absolute;
  top: 24px;
  left: 24px;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #ffffff;
  font-weight: 900;
  content: counter(step);
  counter-increment: step;
  background: var(--primary);
  border-radius: 50%;
}

.steps strong,
.steps span {
  display: block;
}

.steps span {
  color: var(--muted);
}

.scene-grid {
  grid-template-columns: repeat(3, 1fr);
}

.scene-grid article {
  padding: 30px;
}

.pricing {
  background: linear-gradient(135deg, #172033, #1e3a8a);
}

.pricing-card {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
  padding: 44px;
}

.price-box {
  padding: 28px;
  background: var(--surface-soft);
  border-radius: 24px;
}

.price-box span,
.price-box strong {
  display: block;
}

.price-box strong {
  margin: 8px 0 22px;
  font-size: 30px;
}

.faq {
  max-width: 880px;
}

.faq .section-heading {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.faq details {
  padding: 22px 26px;
  margin-bottom: 14px;
}

.faq summary {
  font-size: 18px;
  font-weight: 800;
  cursor: pointer;
}

.faq p {
  margin: 14px 0 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 52px;
  align-items: start;
}

.contact-form {
  display: grid;
  gap: 18px;
  padding: 30px;
}

.contact-form label {
  display: grid;
  gap: 8px;
  font-weight: 800;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 16px;
  color: var(--text);
  background: #f8fbff;
  border: 1px solid var(--border);
  border-radius: 16px;
  outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.form-status {
  min-height: 24px;
  margin: 0;
  color: var(--primary);
  font-weight: 700;
}

.site-footer {
  padding: 30px 0;
  color: #d9e5f5;
  background: #111827;
}

.footer-grid {
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
}

.site-footer p {
  margin: 4px 0 0;
  color: #93a4bd;
}

@media (max-width: 960px) {
  .hero-grid,
  .split,
  .pricing-card,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .section {
    padding: 72px 0;
  }

  .nav-links {
    position: absolute;
    top: 72px;
    right: 14px;
    left: 14px;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    width: 100%;
    padding: 12px 14px;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    padding-top: 86px;
  }

  .hero-grid {
    gap: 44px;
  }

  .hero-metrics,
  .feature-grid,
  .scene-grid,
  .dash-row {
    grid-template-columns: 1fr;
  }

  .window-body {
    grid-template-columns: 1fr;
  }

  .window-body aside {
    display: none;
  }

  .pricing-card,
  .contact-form {
    padding: 26px;
  }

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