:root {
  --blue-950: #071629;
  --blue-900: #0b1f38;
  --blue-800: #12365d;
  --gold: #c9a24a;
  --gold-dark: #9f7c28;
  --paper: #f7f4ed;
  --ink: #1e2329;
  --muted: #667085;
  --line: rgba(15, 23, 42, .14);
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(7, 22, 41, .16);
  --radius: 18px;
  --max: 1120px;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; border-radius: 10px; }
a { color: var(--blue-800); text-decoration-thickness: .08em; text-underline-offset: .18em; }
a:hover { color: var(--gold-dark); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 22, 41, .96);
  border-bottom: 1px solid rgba(255,255,255,.12);
  backdrop-filter: blur(10px);
}
.nav-wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: .03em;
  text-transform: uppercase;
  font-size: .94rem;
}
.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  display: grid;
  place-items: center;
  color: var(--gold);
  font-family: var(--serif);
  font-weight: 700;
  flex: 0 0 auto;
}
.nav-toggle {
  display: none;
  border: 1px solid rgba(255,255,255,.24);
  background: transparent;
  color: var(--white);
  border-radius: 12px;
  padding: 9px 11px;
  font-size: 1rem;
  cursor: pointer;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: .94rem;
}
.site-nav a {
  color: rgba(255,255,255,.88);
  text-decoration: none;
  font-weight: 650;
}
.site-nav a:hover { color: var(--gold); }
.site-nav .shop-link {
  color: var(--blue-950);
  background: var(--gold);
  padding: 8px 12px;
  border-radius: 999px;
}
.site-nav .shop-link:hover { color: var(--blue-950); background: #e0bd62; }

.hero {
  background:
    radial-gradient(circle at top left, rgba(201,162,74,.20), transparent 34%),
    linear-gradient(135deg, var(--blue-950), var(--blue-800));
  color: var(--white);
}
.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 54px 20px 34px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 470px);
  gap: 34px;
  align-items: center;
}
.eyebrow {
  color: var(--gold);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .16em;
  font-weight: 800;
  margin: 0 0 12px;
}
h1 {
  font-family: var(--serif);
  font-size: clamp(2.25rem, 6vw, 4.5rem);
  line-height: 1.02;
  margin: 0 0 16px;
  letter-spacing: -.04em;
}
.dek {
  max-width: 660px;
  margin: 0 0 20px;
  color: rgba(255,255,255,.84);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
}
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: rgba(255,255,255,.7);
  font-size: .92rem;
}
.meta-row a { color: rgba(255,255,255,.86); }
.hero-media img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,.16);
  aspect-ratio: 4 / 3;
  object-fit: cover;
  width: 100%;
}

main { max-width: var(--max); margin: 0 auto; padding: 38px 20px 60px; }
.layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) 300px;
  gap: 34px;
  align-items: start;
}
.article-card, .side-card, .gear-card, .author-box, .notice-card, .link-card, .related-nav, .table-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 8px 28px rgba(7,22,41,.08);
}
.article-card { padding: clamp(22px, 4vw, 42px); }
.article-body h2 {
  font-family: var(--serif);
  font-size: clamp(1.65rem, 3vw, 2.25rem);
  line-height: 1.16;
  margin: 1.55em 0 .45em;
  color: var(--blue-950);
}
.article-body h3 {
  font-size: 1.28rem;
  line-height: 1.25;
  margin: 1.35em 0 .4em;
  color: var(--blue-900);
}
.article-body p { margin: 0 0 1.05em; }
.article-body ul { margin: .25em 0 1.15em; padding-left: 1.25rem; }
.article-body li { margin: .35em 0; }
.article-body blockquote {
  margin: 28px 0;
  padding: 18px 22px;
  border-left: 5px solid var(--gold);
  background: #fbf7ea;
  border-radius: 0 14px 14px 0;
  font-family: var(--serif);
  font-size: 1.18rem;
}
.article-body figure { margin: 30px 0; }
.article-body figcaption { color: var(--muted); font-size: .92rem; margin-top: 9px; }
.article-body .lead { font-size: 1.08rem; color: var(--blue-900); }
.rule { height: 1px; background: var(--line); margin: 32px 0; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 999px;
  padding: 11px 16px;
  background: var(--gold);
  color: var(--blue-950);
  text-decoration: none;
  font-weight: 800;
  box-shadow: 0 8px 18px rgba(201,162,74,.28);
}
.btn:hover { background: #e0bd62; color: var(--blue-950); }
.btn-small { padding: 8px 12px; font-size: .9rem; }

.image-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 26px 0;
}
.image-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.image-grid img { width: 100%; height: 100%; object-fit: cover; }
.spec-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 0;
  margin: 22px 0;
  list-style: none;
}
.spec-list li {
  margin: 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fbf7ea;
}
.spec-list strong { color: var(--blue-950); }
.pros-cons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 22px 0;
}
.notice-card {
  margin: 24px 0;
  padding: 18px;
  background: #fbf7ea;
  border-left: 5px solid var(--gold);
  box-shadow: none;
}
.feature-box {
  margin: 30px 0;
  padding: 26px;
  color: var(--white);
  background:
    radial-gradient(circle at 15% 0%, rgba(201,162,74,.34), transparent 32%),
    linear-gradient(135deg, var(--blue-950), var(--blue-800));
  border-radius: var(--radius);
}
.feature-box h2, .feature-box h3 { color: var(--white); margin-top: 0; }
.feature-box p { color: rgba(255,255,255,.85); }
.safety-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 22px 0;
}
.safety-card {
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: #fbf7ea;
}
.safety-card h3 { margin-top: 0; }
.table-card { overflow: hidden; margin: 24px 0; box-shadow: none; }
.table-card table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.table-card th { text-align: left; background: var(--blue-950); color: var(--white); padding: 12px; }
.table-card td { border-top: 1px solid var(--line); padding: 12px; vertical-align: top; }
.table-card tr:nth-child(even) td { background: #fbf7ea; }

.sidebar { position: sticky; top: 86px; display: grid; gap: 18px; }
.side-card { padding: 18px; }
.side-card h2, .side-card h3 {
  margin: 0 0 8px;
  color: var(--blue-950);
  font-size: 1.05rem;
  line-height: 1.25;
}
.side-card p { margin: 0 0 13px; color: var(--muted); font-size: .95rem; }
.side-card ul { padding-left: 18px; margin: 8px 0 0; }
.side-card li { margin: 6px 0; }
.side-card img { margin-bottom: 12px; }

.author-box {
  margin-top: 34px;
  padding: 22px;
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 18px;
  align-items: center;
}
.author-box img {
  width: 112px;
  height: 112px;
  border-radius: 16px;
  object-fit: cover;
  border: 3px solid var(--gold);
}
.author-box h2 { margin: 0 0 5px; font-size: 1.25rem; color: var(--blue-950); }
.author-box p { margin: 0; color: var(--muted); font-size: .95rem; }

.related-nav {
  margin-top: 34px;
  padding: 18px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 14px;
  align-items: center;
}
.related-nav a { text-decoration: none; font-weight: 800; }
.related-nav .next { text-align: right; }
.related-nav span { display: block; color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; }

.shop-strip {
  background: var(--blue-950);
  color: var(--white);
  border-top: 1px solid rgba(255,255,255,.1);
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.shop-strip-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.shop-strip strong { color: var(--gold); }
.shop-strip p { margin: 0; color: rgba(255,255,255,.82); }

.site-footer { background: #06111f; color: rgba(255,255,255,.72); padding: 34px 20px; font-size: .9rem; }
.footer-inner { max-width: var(--max); margin: 0 auto; }
.footer-links { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 12px; }
.footer-links a { color: rgba(255,255,255,.86); text-decoration: none; }
.footer-links a:hover { color: var(--gold); }
.disclaimer { font-size: .78rem; line-height: 1.45; color: rgba(255,255,255,.58); max-width: 900px; }

.page-up-btn {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 0;
  background: var(--gold);
  color: var(--blue-950);
  font-size: 1.35rem;
  font-weight: 900;
  box-shadow: 0 10px 24px rgba(0,0,0,.25);
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
  z-index: 1100;
}
.page-up-btn.show { opacity: 1; transform: translateY(0); pointer-events: auto; }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    left: 20px;
    right: 20px;
    top: 68px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: var(--blue-950);
    border: 1px solid rgba(255,255,255,.14);
    border-radius: 16px;
    padding: 14px;
    box-shadow: var(--shadow);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px; }
  .site-nav .shop-link { text-align: center; }
  .hero-inner { grid-template-columns: 1fr; padding-top: 38px; }
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .author-box { grid-template-columns: 1fr; text-align: left; }
  .image-grid, .image-grid.three, .spec-list, .pros-cons, .safety-grid { grid-template-columns: 1fr; }
  .related-nav { grid-template-columns: 1fr; }
  .related-nav .next { text-align: left; }
}