:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --paper: #ffffff;
  --ink: #172033;
  --muted: #5e6b82;
  --line: #dce3ee;
  --brand: #176b87;
  --brand-strong: #104c64;
  --accent: #cf7a2b;
  --soft: #edf4f7;
  --shadow: 0 18px 50px rgba(23, 32, 51, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    "Microsoft YaHei",
    "PingFang SC",
    "Noto Sans SC",
    Arial,
    sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.72;
}

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: 14px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(220, 227, 238, 0.86);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
  white-space: nowrap;
}

.brand-mark {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: var(--brand);
  font-size: 14px;
  font-weight: 900;
}

nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

nav a {
  padding: 8px 10px;
  color: var(--muted);
  border-radius: 6px;
  font-size: 15px;
}

nav a:hover {
  color: var(--brand-strong);
  background: var(--soft);
}

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.75fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: stretch;
  max-width: 1180px;
  min-height: calc(100vh - 72px);
  margin: 0 auto;
  padding: clamp(42px, 8vw, 86px) clamp(20px, 5vw, 34px);
}

.hero-copy,
.hero-panel,
.feature-grid article,
.scene-grid article,
.contact,
.faq-list details,
.table-wrap,
.steps li {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.hero-copy {
  padding: clamp(28px, 5vw, 54px);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 820px;
  margin-bottom: 20px;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.35;
}

.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 34px;
}

.primary-link,
.secondary-link {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 7px;
  font-weight: 800;
}

.primary-link {
  color: #fff;
  background: var(--brand);
  box-shadow: 0 10px 24px rgba(23, 107, 135, 0.24);
}

.primary-link:hover {
  background: var(--brand-strong);
}

.secondary-link {
  color: var(--brand-strong);
  border: 1px solid var(--line);
  background: #fff;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.stats div {
  padding: 14px;
  border-radius: 7px;
  background: #f4f8fa;
}

.stats dt {
  color: var(--brand-strong);
  font-size: 24px;
  font-weight: 900;
}

.stats dd {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 32px;
}

.hero-panel h2 {
  font-size: 26px;
}

.hero-panel ul,
.contact-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-panel li {
  position: relative;
  padding-left: 24px;
  color: var(--muted);
}

.hero-panel li::before {
  content: "";
  position: absolute;
  top: 0.8em;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(46px, 7vw, 78px) clamp(20px, 5vw, 34px);
}

.section.soft {
  max-width: none;
  background: var(--soft);
}

.section.soft > * {
  max-width: 1112px;
  margin-left: auto;
  margin-right: auto;
}

.section-head {
  max-width: 850px;
  margin-bottom: 28px;
}

.section-head h2 {
  margin-bottom: 0;
}

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

.feature-grid article,
.scene-grid article {
  padding: 24px;
}

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

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  position: relative;
  min-height: 170px;
  padding: 58px 20px 20px;
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  top: 18px;
  left: 20px;
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--brand);
  font-weight: 900;
}

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

.steps span {
  margin-top: 8px;
  color: var(--muted);
  font-size: 15px;
}

.table-wrap {
  overflow-x: auto;
  background: var(--paper);
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
}

th,
td {
  padding: 18px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  color: var(--brand-strong);
  background: #f5f9fb;
}

tr:last-child td {
  border-bottom: 0;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-list details {
  padding: 18px 20px;
}

.faq-list summary {
  cursor: pointer;
  color: var(--ink);
  font-weight: 800;
}

.faq-list p {
  margin: 12px 0 0;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 28px;
  align-items: center;
  padding: clamp(26px, 5vw, 44px);
  box-shadow: var(--shadow);
}

.contact-list {
  margin-top: 18px;
  color: var(--ink);
}

.contact-list li {
  padding: 12px 14px;
  border-radius: 7px;
  background: #f5f9fb;
}

.qr-card {
  display: grid;
  justify-items: center;
  gap: 12px;
  padding: 18px;
  border-radius: 8px;
  background: #f5f9fb;
  text-align: center;
}

.qr-card img {
  width: min(100%, 190px);
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--line);
}

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

.site-footer {
  padding: 26px 20px 38px;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

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

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

@media (max-width: 680px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  nav {
    justify-content: flex-start;
  }

  .hero {
    min-height: auto;
    padding-top: 28px;
  }

  .hero-copy,
  .hero-panel,
  .feature-grid article,
  .scene-grid article,
  .contact {
    padding: 22px;
  }

  .stats,
  .feature-grid,
  .scene-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 36px;
  }

  .lead {
    font-size: 17px;
  }

  .primary-link,
  .secondary-link {
    width: 100%;
  }
}