:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #172033;
  --muted: #667085;
  --line: #d9dee7;
  --brand: #1677ff;
  --brand-dark: #0f4fb8;
  --accent: #15a389;
  --soft: #edf4ff;
  --soft-green: #ecf8f5;
  --shadow: 0 18px 45px rgba(20, 39, 74, .08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.7;
}

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;
  padding: 18px 6vw;
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  font-weight: 700;
  white-space: nowrap;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .85fr);
  gap: 40px;
  align-items: center;
  min-height: 560px;
  padding: 72px 6vw;
  background: linear-gradient(135deg, #ffffff 0%, #f7fbfa 48%, #eaf3ff 100%);
}

.hero-copy {
  max-width: 780px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 22px;
  font-size: 44px;
  line-height: 1.18;
}

h2 {
  margin-bottom: 16px;
  font-size: 28px;
  line-height: 1.25;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.lead {
  max-width: 700px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 6px;
  border: 1px solid var(--line);
  font-weight: 700;
}

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

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

.button.ghost {
  background: #fff;
}

.button.block {
  width: 100%;
}

.hero-panel,
.card,
.content-card,
.price-box,
.order-card,
.steps > div {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero-panel {
  display: grid;
  gap: 16px;
  padding: 26px;
  border-radius: 8px;
}

.metric {
  padding: 18px;
  border-radius: 8px;
  background: var(--soft);
}

.metric:nth-child(2) {
  background: var(--soft-green);
}

.metric-label {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: 18px;
}

.section,
.page {
  padding: 64px 6vw;
}

.section.narrow {
  padding-right: 0;
  padding-left: 0;
}

.section-head,
.page-title {
  max-width: 780px;
  margin-bottom: 28px;
}

.section-head p,
.page-title p {
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 20px;
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  min-height: 190px;
  padding: 26px;
  border-radius: 8px;
}

.card p,
.content-card p,
.site-footer p,
.steps p {
  color: var(--muted);
}

.soft {
  background: #ffffff;
}

.product,
.checkout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 24px;
  align-items: start;
  max-width: 1080px;
}

.price-box,
.order-card {
  display: grid;
  gap: 18px;
  align-content: center;
  padding: 26px;
  border-radius: 8px;
}

.price-box span,
.order-label {
  color: var(--muted);
}

.price-box strong,
.order-price {
  font-size: 42px;
  font-weight: 800;
  line-height: 1;
}

.order-card {
  position: sticky;
  top: 96px;
}

.order-card dl {
  display: grid;
  gap: 12px;
  margin: 0;
}

.order-card dl div {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.order-card dt {
  color: var(--muted);
  font-size: 13px;
}

.order-card dd {
  margin: 4px 0 0;
  font-weight: 700;
}

.checks {
  padding-left: 20px;
  color: var(--muted);
}

.checks li {
  margin-bottom: 8px;
}

.content-card {
  max-width: 960px;
  padding: 32px;
  border-radius: 8px;
}

.content-card h2 {
  margin-top: 28px;
  font-size: 21px;
}

.content-card h2:first-child {
  margin-top: 0;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
}

th,
td {
  padding: 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--soft);
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.steps > div {
  min-height: 180px;
  padding: 22px;
  border-radius: 8px;
}

.steps span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-bottom: 16px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
}

.steps strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.info-list,
.contact-list {
  display: grid;
  gap: 14px;
}

.info-list div {
  display: grid;
  gap: 6px;
  padding: 16px;
  border-radius: 8px;
  background: var(--soft);
}

.info-list span {
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 32px 6vw;
  border-top: 1px solid var(--line);
  background: #fff;
}

.beian {
  display: inline-block;
  color: var(--muted);
  font-size: 14px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  color: var(--muted);
}

@media (max-width: 900px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .product,
  .checkout,
  .grid.three,
  .steps {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 48px;
  }

  h1 {
    font-size: 34px;
  }

  .section,
  .page {
    padding: 42px 6vw;
  }

  .order-card {
    position: static;
  }
}