:root {
  --ql-primary-50: oklch(0.97 0.02 350);
  --ql-primary-100: oklch(0.93 0.05 350);
  --ql-primary-200: oklch(0.85 0.10 350);
  --ql-primary: oklch(0.62 0.19 350);
  --ql-primary-600: oklch(0.55 0.19 350);
  --ql-primary-700: oklch(0.48 0.18 350);
  --ql-primary-text: oklch(0.40 0.14 350);
  --ql-surface: #fff;
  --ql-surface-alt: oklch(0.975 0.003 350);
  --ql-bg-alt: oklch(0.965 0.005 350);
  --ql-border: oklch(0.925 0.004 350);
  --ql-border-light: oklch(0.955 0.003 350);
  --ql-text: oklch(0.25 0.01 350);
  --ql-text-secondary: oklch(0.48 0.01 350);
  --ql-text-muted: oklch(0.55 0.008 350);
  --shadow-xs: 0 1px 2px rgba(0,0,0,.04);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", system-ui, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font); color: var(--ql-text); background: var(--ql-surface); -webkit-font-smoothing: antialiased; line-height: 1.75; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--ql-primary-700); }
.nav { position: fixed; inset: 0 0 auto; z-index: 100; height: 72px; padding: 0 clamp(20px,4vw,48px); background: rgba(255,255,255,.86); backdrop-filter: blur(20px) saturate(1.6); box-shadow: 0 1px 0 var(--ql-border-light); }
.nav-inner { width: min(100%,1120px); height: 100%; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.nav-brand { display: inline-flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 800; white-space: nowrap; }
.nav-brand img { width: 30px; height: 30px; border-radius: 8px; }
.nav-links { display: flex; align-items: center; gap: 18px; color: var(--ql-text-secondary); font-size: 13px; font-weight: 650; }
.nav-cta, .btn { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 20px; border-radius: 999px; font-weight: 750; }
.nav-cta { min-height: 36px; color: #fff; background: var(--ql-text); }
.nav-cta:hover { color: #fff; opacity: .88; }
.wrap { width: min(100%,1120px); margin: 0 auto; padding: 0 clamp(20px,4vw,48px); }
.hero { position: relative; min-height: 570px; display: flex; align-items: center; padding: 138px 0 78px; overflow: hidden; border-bottom: 1px solid var(--ql-border-light); }
.hero::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(circle,var(--ql-border) .8px,transparent .8px); background-size: 40px 40px; mask-image: radial-gradient(ellipse 62% 55% at 50% 38%,#000 8%,transparent 70%); opacity: .38; }
.hero .wrap { position: relative; z-index: 1; }
.crumb { margin-bottom: 24px; color: var(--ql-text-muted); font-size: 13px; font-weight: 650; }
.eyebrow { margin-bottom: 16px; color: var(--ql-primary-600); font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
h1 { max-width: 960px; margin: 0 0 22px; font-size: clamp(34px,4.5vw,60px); line-height: 1.08; font-weight: 850; }
.lead { max-width: 850px; margin: 0; color: var(--ql-text-secondary); font-size: 17px; line-height: 1.85; }
.meta { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 28px; }
.pill { display: inline-flex; align-items: center; min-height: 32px; padding: 6px 12px; border: 1px solid var(--ql-primary-200); border-radius: 999px; color: var(--ql-primary-text); background: var(--ql-primary-50); font-size: 13px; font-weight: 700; }
section { padding: 70px 0; border-bottom: 1px solid var(--ql-border-light); }
section.alt { background: var(--ql-surface-alt); }
h2 { max-width: 900px; margin: 0 0 18px; font-size: clamp(25px,3vw,38px); line-height: 1.2; font-weight: 820; }
h3 { margin: 0 0 10px; font-size: 17px; line-height: 1.4; }
p { margin: 0; color: var(--ql-text-secondary); font-size: 15px; line-height: 1.85; }
.answer { max-width: 900px; padding-left: 22px; border-left: 4px solid var(--ql-primary); }
.answer p { font-size: 17px; color: var(--ql-text); }
.grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(220px,1fr)); gap: 16px; }
.card { min-height: 180px; padding: 22px; border: 1px solid var(--ql-border-light); border-radius: 8px; background: var(--ql-surface); box-shadow: var(--shadow-xs); }
.card p { font-size: 14px; }
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(auto-fit,minmax(210px,1fr)); gap: 16px; }
.step { counter-increment: step; padding: 24px; border-top: 3px solid var(--ql-primary-200); background: var(--ql-surface); }
.step::before { content: "0" counter(step); display: block; margin-bottom: 16px; color: var(--ql-primary-600); font-size: 13px; font-weight: 800; }
.compare-wrap { overflow-x: auto; border: 1px solid var(--ql-border-light); border-radius: 8px; background: #fff; }
.compare { width: 100%; min-width: 680px; border-collapse: collapse; }
.compare th, .compare td { padding: 15px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--ql-border-light); color: var(--ql-text-secondary); font-size: 14px; }
.compare th { color: var(--ql-text); background: var(--ql-bg-alt); font-size: 13px; }
.compare tr:last-child td { border-bottom: 0; }
.boundary { padding: 24px; border: 1px solid var(--ql-primary-200); border-radius: 8px; background: var(--ql-primary-50); }
.boundary strong { color: var(--ql-text); }
.faq { display: grid; gap: 0; }
.faq article { padding: 20px 0; border-top: 1px solid var(--ql-border-light); }
.faq article:last-child { border-bottom: 1px solid var(--ql-border-light); }
.related { display: flex; flex-wrap: wrap; gap: 10px; }
.related a { display: inline-flex; min-height: 38px; align-items: center; padding: 7px 13px; border: 1px solid var(--ql-border-light); border-radius: 999px; color: var(--ql-text-secondary); background: #fff; font-size: 13px; font-weight: 650; }
.related a:hover { border-color: var(--ql-primary-200); background: var(--ql-primary-50); }
.sources { margin: 18px 0 0; padding-left: 20px; color: var(--ql-text-secondary); }
.sources a { color: var(--ql-primary-700); }
.updated { margin-top: 22px; color: var(--ql-text-muted); font-size: 12px; }
.cta { color: #fff; background: var(--ql-text); text-align: center; border: 0; }
.cta h2 { margin-left: auto; margin-right: auto; color: #fff; }
.cta p { max-width: 680px; margin: 0 auto; color: rgba(255,255,255,.72); }
.btn { margin-top: 24px; color: var(--ql-text); background: #fff; }
.btn:hover { color: var(--ql-text); opacity: .9; }
.footer { padding: 28px 0; color: var(--ql-text-muted); border-top: 1px solid var(--ql-border-light); font-size: 13px; }
.footer .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
@media (max-width:760px) {
  .nav { height: 60px; padding: 0 18px; }
  .nav-links > a:not(.nav-cta) { display: none; }
  .hero { min-height: auto; padding: 108px 0 58px; }
  h1 { font-size: clamp(31px,10vw,44px); }
  .lead { font-size: 16px; }
  section { padding: 52px 0; }
  .footer .wrap { display: block; }
}
@media (prefers-reduced-motion:reduce) { html { scroll-behavior: auto; } }