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

:root {
  --bg: #F6F7F9;
  --bg2: #ECEFF3;
  --card: #FFFFFF;
  --accent: #1D4ED8;
  --accent2: #0F172A;
  --text: #0F172A;
  --text2: #56606E;
  --border: #DFE3E9;
  --radius: 12px;
  --shadow: 0 4px 32px rgba(15,23,42,0.08);
}

html { scroll-behavior: smooth; }
body { font-family: 'DM Sans', sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; }

nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 48px;
  background: rgba(246,247,249,0.92); backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-logo { font-family: 'Sora', sans-serif; font-size: 1.4rem; font-weight: 600; color: var(--text); text-decoration: none; letter-spacing: -0.02em; }
.nav-cta { background: var(--accent); color: #fff; padding: 9px 22px; border-radius: 8px; font-weight: 500; text-decoration: none; font-size: 0.875rem; }
.nav-cta:hover { background: #1E40AF; }

.wrap { max-width: 760px; margin: 0 auto; padding: 56px 24px 96px; }
.breadcrumbs { font-size: 0.8rem; color: var(--text2); margin-bottom: 28px; }
.breadcrumbs a { color: var(--text2); text-decoration: none; }
.breadcrumbs a:hover { color: var(--accent); }

.tag-label { font-size: 0.75rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; }
h1 { font-family: 'Sora', sans-serif; font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 700; line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 20px; }
.lede { font-size: 1.05rem; color: var(--text2); line-height: 1.75; margin-bottom: 44px; }

article h2 { font-family: 'Sora', sans-serif; font-size: 1.5rem; font-weight: 700; letter-spacing: -0.01em; margin: 44px 0 16px; }
article h3 { font-family: 'Sora', sans-serif; font-size: 1.15rem; font-weight: 600; margin: 28px 0 10px; }
article p { margin-bottom: 16px; font-size: 0.98rem; color: var(--text); }
article ul, article ol { margin: 0 0 16px 1.3em; }
article li { margin-bottom: 8px; font-size: 0.98rem; }
article strong { font-weight: 600; }

.box { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 32px; margin: 28px 0; }
.price-grid { display: grid; grid-template-columns: 1fr auto; gap: 10px 24px; }
.price-grid dt { font-size: 0.95rem; color: var(--text); }
.price-grid dd { font-size: 0.95rem; color: var(--accent); font-weight: 600; text-align: right; }

.faq-item { border-bottom: 1px solid var(--border); padding: 18px 0; }
.faq-item:last-child { border-bottom: none; }
.faq-q { font-weight: 600; font-size: 0.98rem; margin-bottom: 8px; }
.faq-a { font-size: 0.92rem; color: var(--text2); }

.cta-box { background: var(--accent2); color: #fff; border-radius: var(--radius); padding: 40px 36px; margin: 48px 0 8px; text-align: center; }
.cta-box h2 { color: #fff; margin-top: 0; }
.cta-box p { color: rgba(255,255,255,0.75); margin-bottom: 24px; }
.btn-primary { background: var(--accent); color: #fff; padding: 14px 32px; border-radius: 8px; text-decoration: none; font-size: 0.9rem; font-weight: 500; display: inline-flex; align-items: center; gap: 8px; }
.btn-primary:hover { background: #3B5FE0; }

.related { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.related a { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 12px 18px; text-decoration: none; color: var(--text); font-size: 0.88rem; }
.related a:hover { border-color: var(--accent); color: var(--accent); }

footer { background: var(--text); padding: 40px 48px; margin-top: 40px; }
.footer-inner { max-width: 1100px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-logo { font-family: 'Sora', sans-serif; font-size: 1.3rem; font-weight: 600; color: #fff; text-decoration: none; }
footer p { font-size: 0.8rem; color: rgba(255,255,255,0.45); }

@media (max-width: 640px) {
  nav { padding: 16px 24px; }
  .wrap { padding: 40px 20px 72px; }
  .box { padding: 22px 20px; }
  .cta-box { padding: 32px 24px; }
}