:root {
  --ink: #10223f;
  --ink-2: #18375d;
  --muted: #5e6c80;
  --line: #dce7ef;
  --surface: #f4f8fb;
  --surface-2: #eaf5f8;
  --white: #ffffff;
  --cyan: #16a9c2;
  --cyan-dark: #087e98;
  --amber: #f1b64c;
  --green: #247a63;
  --danger: #9b4a43;
  --shadow: 0 18px 50px rgba(16, 34, 63, .10);
  --shadow-sm: 0 8px 24px rgba(16, 34, 63, .08);
  --radius: 18px;
  --max: 1180px;
  --reading: 760px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.68; font-size: 16px; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--cyan-dark); text-decoration-thickness: .08em; text-underline-offset: .16em; }
a:hover { color: var(--ink); }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid rgba(22,169,194,.55); outline-offset: 3px; border-radius: 6px; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 50; background: var(--ink); color: #fff; padding: .7rem 1rem; border-radius: 8px; }
.skip-link:focus { top: 1rem; }
.container { width: min(var(--max), calc(100% - 2.5rem)); margin-inline: auto; }
.reading { max-width: var(--reading); }
.topline { background: var(--ink); color: #dbeef5; font-size: .82rem; }
.topline .container { display: flex; justify-content: space-between; gap: 1rem; padding: .55rem 0; }
.topline a { color: #b6f0f6; }
.site-header { background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20; backdrop-filter: blur(12px); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: .72rem; text-decoration: none; color: var(--ink); }
.brand-mark { width: 39px; height: 39px; border-radius: 12px; background: linear-gradient(145deg, #143e72, #16a9c2); display: grid; place-items: center; color: #fff; font-weight: 800; letter-spacing: -.05em; box-shadow: 0 6px 18px rgba(8,126,152,.25); }
.brand-text { display: grid; line-height: 1.05; }
.brand-text strong { font-size: 1rem; letter-spacing: .01em; }
.brand-text span { font-size: .72rem; color: var(--muted); margin-top: .25rem; }
.desktop-nav { display: flex; align-items: center; gap: 1.1rem; }
.desktop-nav a { text-decoration: none; color: var(--ink-2); font-size: .91rem; font-weight: 650; }
.desktop-nav a:hover { color: var(--cyan-dark); }
.nav-cta { display: inline-flex; align-items: center; justify-content: center; padding: .68rem 1rem; border-radius: 999px; background: var(--ink); color: #fff !important; }
.nav-cta:hover { background: var(--cyan-dark); }
.menu-toggle { display: none; border: 1px solid var(--line); background: #fff; color: var(--ink); width: 45px; height: 42px; border-radius: 11px; font-size: 1.4rem; cursor: pointer; }
.mobile-menu { display: none; border-top: 1px solid var(--line); padding: .6rem 0 1rem; }
.mobile-menu a { display: block; padding: .72rem 0; font-weight: 650; text-decoration: none; }
.mobile-menu[hidden] { display: none; }
.mobile-menu:not([hidden]) { display: block; }
main { overflow: clip; }
.hero { background: radial-gradient(circle at 85% 20%, rgba(22,169,194,.14), transparent 34%), linear-gradient(180deg, #f7fbfd 0%, #fff 100%); padding: clamp(2.6rem, 5vw, 4.5rem) 0 2.5rem; }
.hero-grid { display: grid; grid-template-columns: 1.04fr .96fr; gap: clamp(2rem, 6vw, 5.5rem); align-items: center; }
.eyebrow { text-transform: uppercase; letter-spacing: .14em; color: var(--cyan-dark); font-weight: 800; font-size: .74rem; margin: 0 0 1rem; }
h1, h2, h3, h4 { line-height: 1.15; letter-spacing: -.035em; margin: 0 0 1rem; color: var(--ink); }
h1 { font-size: clamp(2.45rem, 5vw, 4.6rem); max-width: 850px; }
h2 { font-size: clamp(1.85rem, 3vw, 2.7rem); margin-top: 2.7rem; }
h3 { font-size: clamp(1.25rem, 2vw, 1.58rem); margin-top: 1.75rem; }
h4 { font-size: 1.08rem; margin-top: 1.35rem; }
p { margin: 0 0 1.12rem; }
.hero-copy > p { font-size: 1.12rem; max-width: 690px; color: #33445b; }
.hero-image { position: relative; display: grid; place-items: center; min-height: 260px; }
.hero-image::before { content: ""; position: absolute; width: 76%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(22,169,194,.20), rgba(22,169,194,.02) 63%, transparent 67%); }
.hero-image img { position: relative; width: min(100%, 560px); filter: drop-shadow(0 26px 30px rgba(16,34,63,.17)); }
.hero-note { font-size: .84rem; color: var(--muted); margin-top: .9rem; }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.5rem; }
.hero-link { margin: .85rem 0 0; color: var(--muted); font-size: .92rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: .78rem 1.12rem; border-radius: 10px; border: 1px solid transparent; font-weight: 750; text-decoration: none; cursor: pointer; }
.btn-primary { background: var(--cyan-dark); color: #fff; box-shadow: 0 9px 22px rgba(8,126,152,.2); }
.btn-primary:hover { background: var(--ink); color: #fff; }
.btn-secondary { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-secondary:hover { border-color: var(--cyan); color: var(--cyan-dark); }
.btn-light { background: #fff; color: var(--ink); }
.section { padding: clamp(2.35rem, 4.5vw, 3.75rem) 0; }
.section.alt { background: var(--surface); }
.section.tint { background: var(--surface-2); }
.section-head { max-width: 760px; margin-bottom: 1.45rem; }
.section-head p { color: var(--muted); font-size: 1.07rem; }
.kicker { color: var(--cyan-dark); font-weight: 800; font-size: .82rem; text-transform: uppercase; letter-spacing: .12em; }
.callout { border-left: 4px solid var(--cyan); background: #edf9fb; padding: 1.05rem 1.25rem; border-radius: 0 14px 14px 0; margin: 1.4rem 0; }
.callout strong { color: var(--ink); }
.note { color: var(--muted); font-size: .91rem; }
.editorial-line { display: flex; flex-wrap: wrap; gap: .55rem 1rem; color: var(--muted); font-size: .87rem; margin-top: 1.1rem; }
.editorial-line span::before { content: "•"; color: var(--cyan); margin-right: .55rem; }
.editorial-line span:first-child::before { content: ""; margin: 0; }
.quick-grid, .card-grid, .three-grid { display: grid; gap: 1rem; }
.quick-grid { grid-template-columns: repeat(4, 1fr); }
.card-grid { grid-template-columns: repeat(3, 1fr); }
.three-grid { grid-template-columns: repeat(3, 1fr); }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.35rem; box-shadow: var(--shadow-sm); }
.card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }
.card .label { font-size: .74rem; color: var(--cyan-dark); font-weight: 800; text-transform: uppercase; letter-spacing: .1em; }
.quick-card { background: #fff; border: 1px solid var(--line); border-radius: 15px; padding: 1.08rem; min-height: 142px; }
.quick-card strong { display: block; margin: .4rem 0; }
.quick-card p { color: var(--muted); font-size: .9rem; margin: 0; }
.table-wrap { overflow-x: auto; margin: 1.35rem 0 1.7rem; border: 1px solid var(--line); border-radius: 15px; background: #fff; }
table { border-collapse: collapse; width: 100%; min-width: 640px; }
th, td { padding: .85rem 1rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th { color: var(--ink); background: #f1f7fa; font-size: .84rem; text-transform: uppercase; letter-spacing: .06em; }
tr:last-child td { border-bottom: 0; }
.proscons { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.proscons .card:first-child { border-top: 4px solid var(--green); }
.proscons .card:last-child { border-top: 4px solid var(--amber); }
ul, ol { padding-left: 1.25rem; }
li { margin: .35rem 0; }
.toc { background: #f7fbfd; border: 1px solid var(--line); border-radius: 15px; padding: 1.1rem 1.25rem; margin: 1.5rem 0 2.2rem; }
.toc strong { display: block; margin-bottom: .5rem; }
.toc ul { columns: 2; margin: 0; }
.toc li { break-inside: avoid; }
.breadcrumbs { padding: 1rem 0; color: var(--muted); font-size: .86rem; }
.breadcrumbs a { color: var(--muted); }
.breadcrumbs span { margin: 0 .4rem; color: #9aabba; }
.page-hero .breadcrumbs-inner { width: 100%; margin: 0; padding: 0 0 1.8rem; }
.page-hero .breadcrumbs-inner a, .hero > .breadcrumbs a { color: var(--cyan-dark); }
.hero > .breadcrumbs { padding-top: 0; padding-bottom: 1.25rem; }
.page-hero {  background: linear-gradient(180deg, #f5fafc 0%, #fff 100%); padding: 2.7rem 0 2.8rem; border-bottom: 1px solid #edf2f5; }
.page-hero h1 { font-size: clamp(2.35rem, 4.5vw, 4rem); max-width: 920px; }
.page-hero .lede { font-size: 1.12rem; max-width: 820px; color: #43536a; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 3.5rem; align-items: start; }
.article-layout .reading { max-width: none; }
.sidebar { position: sticky; top: 105px; }
.side-card { border: 1px solid var(--line); background: #f7fbfd; border-radius: 15px; padding: 1.1rem; margin-bottom: 1rem; }
.side-card h3 { font-size: 1.05rem; margin-top: 0; }
.side-card ul { margin: 0; padding-left: 1.05rem; font-size: .92rem; }
.reference-list { border-top: 1px solid var(--line); margin-top: 1.25rem; padding-top: 1rem; width: 100%; }
.reference-list ol { font-size: .9rem; color: var(--muted); }
.reference-list li { margin: .6rem 0; }
.faq details { background: #fff; border: 1px solid var(--line); border-radius: 13px; padding: 1rem 1.1rem; margin: .7rem 0; }
.faq summary { cursor: pointer; font-weight: 750; color: var(--ink); padding-right: 1.5rem; }
.faq details p { margin: .85rem 0 .1rem; color: #425269; }
.source-tag { display: inline-block; font-size: .76rem; font-weight: 750; color: var(--cyan-dark); background: #e8f7fa; border-radius: 999px; padding: .28rem .55rem; margin: .2rem .2rem .2rem 0; }
.price-card { background: var(--ink); color: #fff; border-radius: 22px; padding: clamp(1.5rem, 4vw, 2.5rem); box-shadow: var(--shadow); }
.price-card h2, .price-card h3 { color: #fff; margin-top: 0; }
.price-card p { color: #d6e4ed; }
.price-number { font-size: clamp(2.7rem, 6vw, 4.7rem); font-weight: 850; letter-spacing: -.06em; line-height: 1; margin: .8rem 0; }
.price-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; align-items: center; }
.disclosure-strip { background: #fff8eb; border-block: 1px solid #f1dfb6; padding: 1rem 0; color: #5e4a27; font-size: .9rem; }
.footer { background: #0b1b32; color: #d2e0e8; padding: 3.5rem 0 2rem; }
.footer a { color: #b7eaf2; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 2rem; }
.footer h3 { color: #fff; font-size: 1rem; letter-spacing: 0; margin-top: 0; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin: .45rem 0; font-size: .9rem; }
.footer-note { color: #9db0bf; font-size: .86rem; max-width: 440px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; border-top: 1px solid rgba(255,255,255,.14); padding-top: 1.25rem; margin-top: 2rem; color: #9db0bf; font-size: .82rem; }
.sticky-buy { display: none; }
.badge-row { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.1rem; }
.badge { border: 1px solid var(--line); color: var(--ink-2); background: #fff; border-radius: 999px; padding: .42rem .7rem; font-size: .82rem; font-weight: 700; }
.quote { font-size: 1.25rem; line-height: 1.45; color: var(--ink-2); border-left: 3px solid var(--amber); padding-left: 1rem; margin: 1.6rem 0; }
.article-card a { text-decoration: none; }
.article-card h3 { color: var(--ink); }
.article-card p { color: var(--muted); }
.article-card:hover { transform: translateY(-2px); transition: transform .2s ease; }
.text-center { text-align: center; }
.muted { color: var(--muted); }
.small { font-size: .88rem; }
@media (max-width: 980px) {
  .desktop-nav { display: none; }
  .menu-toggle { display: block; }
  .hero-grid, .price-grid { grid-template-columns: 1fr; }
  .hero-image { order: -1; min-height: 270px; }
  .hero-image img { width: min(100%, 480px); }
  .quick-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid, .three-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; order: -1; }
  .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
}
@media (max-width: 620px) {
  body { font-size: 15.5px; }
  .container { width: min(var(--max), calc(100% - 1.35rem)); }
  .topline .container { display: block; padding: .48rem 0; }
  .topline .container span:last-child { display: block; margin-top: .2rem; }
  .header-inner { min-height: 68px; }
  .brand-text span { display: none; }
  .hero { padding: 2.8rem 0 3.2rem; }
  .hero-image { min-height: 220px; }
  .hero-copy > p { font-size: 1.03rem; }
  .actions { display: grid; grid-template-columns: 1fr; }
  .btn { width: 100%; }
  .quick-grid, .card-grid, .three-grid, .proscons { grid-template-columns: 1fr; }
  .section { padding: 3.35rem 0; }
  .toc ul { columns: 1; }
  .page-hero { padding: 2rem 0 2.2rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 1.4rem; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .footer-bottom { display: block; }
  .footer-bottom span { display: block; margin-top: .4rem; }
  .sticky-buy { display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 25; background: rgba(11,27,50,.97); padding: .65rem .8rem calc(.65rem + env(safe-area-inset-bottom)); gap: .7rem; align-items: center; box-shadow: 0 -10px 24px rgba(16,34,63,.18); }
  .sticky-buy span { color: #d5e8ee; font-size: .82rem; line-height: 1.2; flex: 1; }
  .sticky-buy .btn { width: auto; min-height: 42px; white-space: nowrap; padding: .6rem .85rem; }
  body { padding-bottom: 66px; }
}