*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Nunito', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1a2a3a;
  background: #f8f9fa;
}

/* ── Header ── */
header {
  background: #1D3557;
  padding: 0 24px;
}
.header-inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}
.logo {
  font-size: 20px;
  font-weight: 800;
  color: #F4722B;
  text-decoration: none;
  letter-spacing: -0.3px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo span { color: #fff; }
.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 7px;
  flex-shrink: 0;
}
nav a {
  color: #8aa8c8;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  margin-left: 20px;
  transition: color 0.15s;
}
nav a:hover { color: #fff; }
nav a.active { color: #F4722B; }

/* ── Hero ── */
.hero {
  background: #1D3557;
  border-top: 1px solid #2a4570;
  padding: 32px 24px 40px;
  text-align: center;
}
.hero h1 {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 6px;
}
.hero .meta {
  font-size: 14px;
  color: #8aa8c8;
}
.hero .meta a { color: #F4722B; text-decoration: none; }

/* ── Main content area ── */
main {
  max-width: 860px;
  margin: 40px auto;
  padding: 0 24px 80px;
}

/* ── Content typography ── */
section {
  margin-bottom: 40px;
}
h2 {
  font-size: 19px;
  font-weight: 800;
  color: #1D3557;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid #eef2f7;
}
h3 {
  font-size: 16px;
  font-weight: 700;
  color: #2a4060;
  margin: 18px 0 6px;
}
p { margin-bottom: 12px; }
p:last-child { margin-bottom: 0; }
ul {
  margin: 8px 0 12px 0;
  padding-left: 20px;
}
ul li { margin-bottom: 6px; }

/* ── Links ── */
a { color: #F4722B; }
a:hover { text-decoration: underline; }

/* ── Notice ── */
.notice {
  background: #fff8e6;
  border-left: 4px solid #F0A500;
  border-radius: 0 6px 6px 0;
  padding: 14px 18px;
  font-size: 14px;
  color: #7a5a00;
  margin-bottom: 36px;
}

/* ── Highlight box ── */
.highlight-box {
  background: #eef6ff;
  border: 1.5px solid #aacfef;
  border-radius: 6px;
  padding: 14px 18px;
  font-size: 14px;
  margin: 14px 0;
}

/* ── Callout boxes ── */
.callout {
  border-radius: 6px;
  padding: 14px 18px;
  font-size: 14px;
  margin: 10px 0;
}
.callout-info {
  background: #eef6ff;
  border-left: 4px solid #2E6DA4;
  color: #1a3a5a;
}
.callout-warn {
  background: #fff8e6;
  border-left: 4px solid #F0A500;
  color: #7a5a00;
}
.callout-important {
  background: #fff3f3;
  border-left: 4px solid #E63946;
  color: #5a1010;
}

/* ── Data table ── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
.data-table th {
  background: #1D3557;
  color: #fff;
  text-align: left;
  padding: 10px 14px;
  font-weight: 700;
}
.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid #eef2f7;
  vertical-align: top;
}
.data-table tr:nth-child(even) td { background: #f4f7fb; }

/* ── Tag ── */
.tag {
  display: inline-block;
  background: #e8f4e8;
  color: #2a7a2a;
  border: 1px solid #b0d8b0;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  margin-left: 6px;
  vertical-align: middle;
}

/* ── Safety box ── */
.safety-box {
  background: #fff3f3;
  border: 2px solid #e63946;
  border-radius: 6px;
  padding: 18px 20px;
  margin: 20px 0;
}
.safety-box h3 {
  font-size: 15px;
  font-weight: 800;
  color: #c0192a;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.safety-box p {
  font-size: 14px;
  color: #5a1010;
}

/* ── FAQ layout ── */
.page {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
}

/* ── Sidebar nav ── */
.sidebar {
  position: sticky;
  top: 24px;
}
.sidebar-section {
  margin-bottom: 24px;
}
.sidebar-section h3 {
  font-size: 10px;
  font-weight: 800;
  color: #8aa8c8;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.sidebar-section a {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #3a5a7a;
  text-decoration: none;
  padding: 4px 0;
  border-left: 3px solid transparent;
  padding-left: 10px;
  transition: all 0.15s;
}
.sidebar-section a:hover {
  color: #F4722B;
  border-left-color: #F4722B;
}

/* ── FAQ content ── */
.faq-content section {
  margin-bottom: 48px;
  scroll-margin-top: 24px;
}
.faq-content h2 {
  font-size: 18px;
  font-weight: 800;
  color: #1D3557;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #eef2f7;
  display: flex;
  align-items: center;
  gap: 10px;
}
.faq-content h2 .icon {
  font-size: 20px;
  flex-shrink: 0;
}

/* ── Q&A ── */
.qa {
  margin-bottom: 20px;
  scroll-margin-top: 24px;
}
.qa dt {
  font-weight: 700;
  font-size: 15px;
  color: #1a2a3a;
  margin-bottom: 6px;
  cursor: default;
}
.qa dt::before {
  content: "Q  ";
  color: #F4722B;
  font-weight: 800;
  font-size: 13px;
}
.qa dd {
  font-size: 15px;
  color: #3a4a5a;
  line-height: 1.7;
  margin-left: 0;
}
.qa dd p { margin-bottom: 8px; }
.qa dd p:last-child { margin-bottom: 0; }
.qa dd ul {
  margin: 6px 0 8px 18px;
}
.qa dd ul li { margin-bottom: 4px; }

/* ── Responsive ── */
@media (max-width: 680px) {
  .page {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: none;
  }
}

/* ── Footer ── */
footer {
  background: #1D3557;
  padding: 20px 24px;
  text-align: center;
  font-size: 12px;
  color: #5a7a9a;
}
footer a { color: #8aa8c8; text-decoration: none; }
footer a:hover { color: #fff; }