:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #5f6b7a;
  --line: #d9e0ea;
  --blue: #1d5fd1;
  --blue-dark: #164aa4;
  --green: #138a5b;
  --amber: #a15c00;
  --shadow: 0 18px 45px rgba(17, 32, 51, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.nav {
  max-width: 1160px;
  margin: 0 auto;
  min-height: 64px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
}

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

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

.hero {
  background: #e9eef6;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 72px 24px 54px;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: 42px;
  align-items: center;
}

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

h1 {
  margin: 0;
  font-size: 44px;
  line-height: 1.12;
  letter-spacing: 0;
}

.lead {
  margin: 20px 0 0;
  max-width: 650px;
  color: var(--muted);
  font-size: 18px;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 6px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  border: 1px solid var(--blue);
}

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

.button.secondary {
  background: #fff;
  color: var(--blue);
}

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

.panel-head {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.status-dot {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
}

.status-dot::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green);
}

.workflow {
  padding: 18px;
  display: grid;
  gap: 12px;
}

.workflow-row {
  display: grid;
  grid-template-columns: 110px 1fr 74px;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fbfcfe;
  font-size: 14px;
}

.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 26px;
  padding: 0 10px;
  border-radius: 6px;
  background: #eef4ff;
  color: var(--blue);
  font-weight: 700;
  font-size: 13px;
}

.section {
  max-width: 1160px;
  margin: 0 auto;
  padding: 56px 24px;
}

.section h2 {
  margin: 0 0 18px;
  font-size: 28px;
  letter-spacing: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

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

.download-box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  display: grid;
  gap: 18px;
}

.meta {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 10px 18px;
  font-size: 14px;
}

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

.meta dd {
  margin: 0;
  word-break: break-all;
}

.notice {
  border-left: 4px solid var(--amber);
  background: #fff8ea;
  padding: 14px 16px;
  color: #5d3a00;
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 12px;
}

.step {
  position: relative;
  padding: 16px 18px 16px 54px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 16px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 26px 24px;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

code {
  background: #eef1f6;
  padding: 2px 5px;
  border-radius: 4px;
}

@media (max-width: 860px) {
  .hero-inner,
  .grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 34px;
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .workflow-row,
  .meta {
    grid-template-columns: 1fr;
  }
}