:root {
  color-scheme: light;
  --ink: #17202a;
  --muted: #5c6875;
  --line: #d9e0e7;
  --soft: #f5f7fa;
  --panel: #ffffff;
  --blue: #2167ae;
  --teal: #1f7a78;
  --green: #2f7d4f;
  --shadow: 0 18px 50px rgba(31, 45, 61, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #fbfcfd;
  line-height: 1.65;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 clamp(20px, 5vw, 72px);
  background: rgba(251, 252, 253, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(48px, 8vw, 92px) clamp(20px, 5vw, 72px);
}

.hero h1 {
  margin: 6px 0 16px;
  font-size: clamp(54px, 8vw, 104px);
  line-height: 0.95;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 14px;
  font-weight: 700;
}

.lead {
  max-width: 680px;
  margin: 0;
  color: #344456;
  font-size: clamp(18px, 2vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
}

.button.primary {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.button.secondary {
  background: #fff;
}

.product-panel {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.panel-top {
  display: flex;
  gap: 7px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  background: #eef3f7;
}

.panel-top span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #8ea0b2;
}

.workspace-visual {
  display: grid;
  grid-template-columns: 150px 1fr;
  min-height: 380px;
}

.workspace-visual aside {
  padding: 24px 18px;
  border-right: 1px solid var(--line);
  background: #f7fafb;
}

.workspace-visual aside p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.workspace-visual section {
  padding: 24px;
}

.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.status-row b {
  padding: 4px 10px;
  border-radius: 999px;
  color: var(--green);
  background: #e9f6ee;
  font-size: 13px;
}

.kanban {
  display: grid;
  gap: 14px;
}

.kanban article {
  padding: 18px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  background: #fff;
}

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

.kanban strong {
  display: block;
  margin-top: 4px;
}

.kanban p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: clamp(56px, 8vw, 92px) clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
}

.section-copy {
  display: grid;
  grid-template-columns: minmax(220px, 0.4fr) minmax(0, 0.6fr);
  gap: 32px;
  align-items: end;
  margin-bottom: 28px;
}

.section h2,
.legal h1 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.15;
  letter-spacing: 0;
}

.intro > p {
  max-width: 920px;
  margin: 0;
  color: #344456;
  font-size: 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.card {
  min-height: 178px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.card h3,
.columns h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.card p,
.columns p,
.split p,
.contact p,
.legal p {
  margin: 0;
  color: var(--muted);
}

.band {
  background: var(--soft);
}

.columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.6fr);
  gap: 32px;
}

.split p + p {
  margin-top: 14px;
}

.check-list {
  margin: 0;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: #344456;
}

.check-list li + li {
  margin-top: 10px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(280px, 0.5fr);
  gap: 32px;
  align-items: center;
}

.contact h2 {
  margin: 0 0 14px;
}

.contact-box {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.contact-box p + p {
  margin-top: 12px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.footer-links {
  display: flex;
  gap: 16px;
}

.legal {
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(48px, 7vw, 84px) 20px;
}

.legal section {
  margin-top: 32px;
}

.legal h2 {
  margin: 0 0 10px;
  font-size: 22px;
}

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

@media (max-width: 980px) {
  .hero,
  .section-copy,
  .split,
  .contact {
    grid-template-columns: 1fr;
  }

  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 640px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero {
    min-height: auto;
  }

  .product-panel {
    margin: 0 -6px;
  }

  .workspace-visual {
    grid-template-columns: 1fr;
  }

  .workspace-visual aside {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

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

  .card {
    min-height: auto;
  }
}