:root {
  --ink: #17202a;
  --muted: #5f6b7a;
  --line: #d9e1ea;
  --soft: #f4f7fa;
  --brand: #0f766e;
  --brand-dark: #115e59;
  --accent: #f59e0b;
  --paper: #ffffff;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  background: var(--paper);
}

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

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.container {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

.nav-row,
.footer-grid,
.hero-grid,
.two-col,
.card-grid {
  display: grid;
  gap: 24px;
}

.nav-row {
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: 72px;
}

.brand {
  font-weight: 700;
  font-size: 22px;
  color: var(--brand-dark);
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 22px;
  color: var(--muted);
  font-size: 15px;
}

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

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  border-radius: 6px;
}

.phone-pill {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--brand-dark);
  font-weight: 700;
}

.section {
  padding: 64px 0;
}

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

.hero {
  padding: 72px 0 56px;
  background: linear-gradient(120deg, #ecfeff 0%, #ffffff 55%, #fff7ed 100%);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  grid-template-columns: 1.25fr 0.75fr;
  align-items: center;
}

.eyebrow {
  color: var(--brand);
  font-weight: 700;
  letter-spacing: 0;
}

h1,
h2,
h3 {
  line-height: 1.25;
  margin: 0 0 16px;
}

h1 {
  font-size: 42px;
}

h2 {
  font-size: 30px;
}

h3 {
  font-size: 21px;
}

.lead {
  color: var(--muted);
  font-size: 18px;
  max-width: 760px;
}

.answer-box {
  padding: 22px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 5px solid var(--brand);
  border-radius: 8px;
}

.meta-line {
  color: var(--muted);
  font-size: 14px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 9px 16px;
  border-radius: 6px;
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #fff;
  font-weight: 700;
}

.button.secondary {
  background: var(--paper);
  color: var(--brand-dark);
}

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

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  min-height: 100%;
}

.card:hover {
  border-color: var(--brand);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.tag-list li {
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: #fff;
  font-size: 14px;
}

.two-col {
  grid-template-columns: 0.9fr 1.1fr;
  align-items: start;
}

.content-body {
  color: #263442;
}

.content-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
}

.content-body th,
.content-body td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
}

.content-body th {
  background: var(--soft);
}

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

.faq-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  padding: 16px 18px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 700;
}

.site-footer {
  background: #122023;
  color: #d8e4e8;
  padding: 46px 0 24px;
}

.footer-grid {
  grid-template-columns: 1.2fr 1fr 1fr;
}

.site-footer a,
.site-footer .muted {
  color: #aabdc4;
}

.copy {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: #aabdc4;
  font-size: 14px;
}

@media (max-width: 860px) {
  .nav-row {
    grid-template-columns: 1fr auto;
  }

  .phone-pill {
    display: none;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav {
    display: none;
    grid-column: 1 / -1;
    flex-direction: column;
    align-items: flex-start;
    padding: 0 0 16px;
  }

  .nav.is-open {
    display: flex;
  }

  .hero-grid,
  .two-col,
  .footer-grid,
  .card-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 25px;
  }

  .section {
    padding: 44px 0;
  }
}