:root {
  color-scheme: dark;
  --bg: #090b0a;
  --surface: #111512;
  --text: #eef2ef;
  --muted: #a4ada7;
  --line: #29302c;
  --accent: #9bc9ad;
  --max: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: Inter, "Noto Sans SC", system-ui, sans-serif; line-height: 1.75; }
a { color: inherit; }
.site-header { position: sticky; top: 0; z-index: 10; display: flex; justify-content: space-between; align-items: center; min-height: 64px; padding: 0 max(24px, calc((100vw - var(--max)) / 2)); border-bottom: 1px solid var(--line); background: rgba(9,11,10,.9); backdrop-filter: blur(18px); }
.brand, .site-header nav a { text-decoration: none; }
.brand { font-weight: 750; }
.site-header nav { display: flex; gap: 22px; color: var(--muted); font-size: .9rem; }
.hero { display: grid; grid-template-columns: minmax(0,1.05fr) minmax(300px,.75fr); gap: clamp(36px,6vw,88px); align-items: center; width: min(var(--max),calc(100% - 48px)); min-height: 72vh; margin: 0 auto; padding: 84px 0 56px; }
.hero h1 { max-width: 820px; margin: 12px 0 22px; font-size: clamp(2.6rem,6vw,6.4rem); line-height: .98; letter-spacing: 0; }
.eyebrow { color: var(--accent); font-size: .78rem; font-weight: 750; text-transform: uppercase; }
.lead { max-width: 700px; color: var(--muted); font-size: 1.08rem; }
.hero img { width: 100%; aspect-ratio: 4/5; object-fit: cover; border: 1px solid var(--line); border-radius: 8px; }
.article, .guide-index { width: min(760px,calc(100% - 48px)); margin: 0 auto; padding: 52px 0 96px; }
.article h2 { margin: 56px 0 14px; font-size: clamp(1.6rem,3vw,2.3rem); line-height: 1.2; }
.article h3 { margin: 34px 0 10px; }
.article p, .article li { color: #c6ccc8; }
.article ol, .article ul { padding-left: 1.3rem; }
.note { margin: 34px 0; padding: 20px; border-left: 3px solid var(--accent); background: var(--surface); }
.guide-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1px; margin-top: 40px; background: var(--line); border: 1px solid var(--line); }
.guide-card { min-height: 190px; padding: 26px; background: var(--surface); text-decoration: none; }
.guide-card span, .guide-card p { color: var(--muted); }
.guide-card h2 { margin: 28px 0 8px; font-size: 1.25rem; }
.cta { display: flex; justify-content: space-between; align-items: center; gap: 28px; margin-top: 68px; padding: 28px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.button { flex: 0 0 auto; padding: 11px 16px; border-radius: 6px; background: var(--accent); color: #102017; font-weight: 750; text-decoration: none; }
footer { padding: 34px max(24px,calc((100vw - var(--max))/2)); border-top: 1px solid var(--line); color: var(--muted); }
@media (max-width: 760px) {
  .site-header nav a:first-child { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 64px; }
  .hero img { max-height: 56vh; }
  .guide-grid { grid-template-columns: 1fr; }
  .cta { align-items: flex-start; flex-direction: column; }
}