:root {
  --page: #f5f7fa;
  --surface: #ffffff;
  --surface-soft: #eef5ff;
  --ink: #1d1d1f;
  --body: #4b5563;
  --muted: #6e7785;
  --line: #dfe4ea;
  --blue: #0066cc;
  --blue-strong: #0054a8;
  --success: #167759;
  --max: 1120px;
  --radius: 8px;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--page);
  font-family: var(--sans);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  text-rendering: optimizeLegibility;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  border-radius: 6px;
  background: var(--ink);
  color: var(--surface);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(223, 228, 234, 0.82);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(18px);
}

.nav {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 720;
}

.brand img {
  width: 24px;
  height: 24px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  color: var(--body);
  font-size: 13px;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--blue);
  outline: none;
}

.hero {
  padding: 96px 0 82px;
  background: var(--surface);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 88px;
  align-items: center;
}

.eyebrow {
  color: var(--blue);
  font-size: 12px;
  font-weight: 720;
  letter-spacing: 0;
}

.status-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.status-pill {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 0 10px;
  border: 1px solid #b8ddcf;
  border-radius: 14px;
  background: #edf8f4;
  color: var(--success);
  font-size: 12px;
}

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

h1 {
  max-width: 760px;
  margin-top: 18px;
  font-size: 58px;
  font-weight: 720;
  line-height: 1.08;
  text-wrap: balance;
}

.hero-summary {
  max-width: 720px;
  margin-top: 26px;
  color: var(--body);
  font-size: 20px;
  line-height: 1.7;
}

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

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid var(--blue);
  border-radius: var(--radius);
  color: var(--blue);
  font-size: 14px;
  font-weight: 680;
}

.button.primary {
  background: var(--blue);
  color: var(--surface);
}

.button:hover,
.button:focus-visible {
  border-color: var(--blue-strong);
  background: var(--blue-strong);
  color: var(--surface);
  outline: none;
}

.button[aria-disabled="true"] {
  border-color: var(--line);
  background: #f1f3f5;
  color: var(--muted);
  cursor: not-allowed;
  pointer-events: none;
}

.visual-stage {
  min-height: 430px;
  display: grid;
  place-items: center;
}

.asset-slot {
  width: min(100%, 330px);
  aspect-ratio: 9 / 16;
  display: grid;
  place-items: center;
  border: 1px dashed #aeb8c4;
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(238, 245, 255, 0.65), rgba(255, 255, 255, 0)),
    var(--surface);
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.asset-slot.qr-slot {
  width: 190px;
  aspect-ratio: 1;
  border-radius: var(--radius);
}

.asset-slot img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: inherit;
}

.section {
  padding: 84px 0;
}

.section.alt {
  background: var(--page);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(240px, 0.7fr) minmax(0, 1.3fr);
  gap: 72px;
  align-items: end;
  margin-bottom: 42px;
}

.section h2 {
  margin-top: 10px;
  font-size: 38px;
  font-weight: 710;
  line-height: 1.2;
}

.section-head > p {
  max-width: 720px;
  color: var(--body);
  font-size: 17px;
  line-height: 1.75;
}

.capability-list,
.workflow-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.capability-list {
  border-top: 1px solid var(--line);
}

.capability-list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.capability-list span {
  color: var(--blue);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.capability-list strong {
  font-size: 18px;
  line-height: 1.55;
}

.workflow-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.workflow-list li {
  min-height: 180px;
  padding: 24px;
  background: var(--surface);
}

.workflow-list span {
  color: var(--blue);
  font-size: 12px;
}

.workflow-list h3 {
  margin-top: 28px;
  font-size: 21px;
  line-height: 1.35;
}

.workflow-list p {
  margin-top: 10px;
  color: var(--body);
  font-size: 14px;
  line-height: 1.65;
}

.example-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.example-list span {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--body);
  font-size: 13px;
}

.notice {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--body);
  font-size: 14px;
  line-height: 1.75;
}

.footer {
  padding: 36px 0;
  background: #eef2f7;
}

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

.footer p,
.footer-links {
  color: var(--muted);
  font-size: 12px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-links a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
}

.footer a:hover,
.footer a:focus-visible {
  color: var(--blue);
  outline: none;
}

@media (max-width: 760px) {
  .shell {
    width: min(100% - 32px, var(--max));
  }

  .nav-links a:not(:last-child) {
    display: none;
  }

  .hero {
    padding: 58px 0 54px;
  }

  .hero-grid,
  .section-head {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  h1 {
    font-size: 40px;
  }

  .hero-summary {
    margin-top: 20px;
    font-size: 17px;
  }

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

  .visual-stage {
    min-height: 360px;
  }

  .asset-slot {
    width: min(78vw, 280px);
  }

  .section {
    padding: 62px 0;
  }

  .section h2 {
    font-size: 31px;
  }

  .section-head > p {
    font-size: 15px;
  }

  .workflow-list {
    grid-template-columns: 1fr;
  }

  .workflow-list li {
    min-height: 0;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}