:root {
  --paper: #F4EFE6;
  --ink: #1C1917;
  --pine: #0F5C4C;
  --pine-soft: #1A7A66;
  --rule: #D6CFC3;
  --muted: #57534E;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  font-size: 17px;
  line-height: 1.85;
}

a {
  color: var(--pine);
}

.safety-bar {
  background: var(--ink);
  color: #F5F0E8;
  text-align: center;
  padding: 12px 20px;
  font-size: 14px;
  letter-spacing: 0.02em;
}

.safety-bar strong {
  color: #E8D5A3;
  font-weight: 600;
}

.site-header {
  border-bottom: 1px solid var(--rule);
  background: #F8F4EC;
}

.header-inner {
  max-width: 780px;
  margin: 0 auto;
  padding: 22px 20px 16px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

.masthead-name {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 22px;
  letter-spacing: 0.08em;
  color: var(--pine);
}

.masthead-sub {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.12em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink);
  font-size: 14px;
  letter-spacing: 0.06em;
  border-bottom: 1px solid transparent;
  padding-bottom: 3px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.is-current {
  color: var(--pine);
  border-bottom-color: var(--pine);
}

.site-nav a.is-current {
  animation: navMark 1.6s ease-in-out infinite;
}

@keyframes navMark {
  0%, 100% { border-bottom-color: var(--pine); }
  50% { border-bottom-color: #8FBFB2; }
}

.page {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 20px 72px;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 28px;
  align-items: center;
  padding: 48px 0 36px;
  border-bottom: 1px solid var(--rule);
}

.kicker {
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--pine);
  margin: 0 0 10px;
}

.hero h1,
.article h2 {
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.hero h1 {
  font-size: 34px;
  line-height: 1.35;
  margin: 0 0 18px;
}

.lede {
  font-size: 18px;
  color: #3F3A36;
  margin: 0 0 16px;
}

.hero p {
  margin: 0 0 14px;
}

.browser-frame {
  width: 100%;
  height: auto;
  display: block;
}

.btn-official {
  display: inline-block;
  background: var(--pine);
  color: #F8F4EC;
  text-decoration: none;
  padding: 11px 22px;
  font-size: 15px;
  letter-spacing: 0.04em;
  border: 1px solid var(--pine);
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn-official:hover {
  background: #0A463B;
  transform: translateY(-1px);
}

.article {
  padding-top: 8px;
}

.article section {
  padding: 40px 0 8px;
  border-bottom: 1px solid var(--rule);
}

.article h2 {
  font-size: 28px;
  line-height: 1.3;
  margin: 0 0 18px;
  color: var(--ink);
}

.article h3 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 20px;
  margin: 26px 0 10px;
}

.article p {
  margin: 0 0 16px;
  color: #2B2724;
}

.drop::first-letter {
  font-family: Georgia, serif;
  font-size: 52px;
  float: left;
  line-height: 0.85;
  padding: 8px 10px 0 0;
  color: var(--pine);
}

.pull {
  border-left: 3px solid var(--pine);
  padding: 4px 0 4px 18px;
  margin: 20px 0 22px;
  color: var(--muted);
  font-family: Georgia, serif;
  font-size: 19px;
  line-height: 1.6;
}

.faq-item {
  margin: 0 0 22px;
}

.faq-item h3 {
  margin-top: 0;
}

.site-footer {
  background: #EBE4D6;
  border-top: 1px solid var(--rule);
  padding: 36px 20px 48px;
}

.footer-inner {
  max-width: 780px;
  margin: 0 auto;
}

.site-footer h2 {
  font-family: Georgia, serif;
  font-size: 16px;
  margin: 0 0 8px;
}

.site-footer p {
  margin: 0 0 16px;
  color: #44403C;
  font-size: 14px;
}

.copyright {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  color: var(--muted);
}

@media (max-width: 720px) {
  .header-inner,
  .hero {
    grid-template-columns: 1fr;
    display: block;
  }

  .site-nav {
    margin-top: 16px;
  }

  .browser-frame {
    margin-top: 20px;
    max-width: 280px;
  }

  .hero h1 {
    font-size: 28px;
  }
}