:root {
  --sf-ink: #111827;
  --sf-ink-deep: #070a1a;
  --sf-muted: #4b5563;
  --sf-soft: #f5f5f5;
  --sf-canvas: #f1f1f1;
  --sf-white: #ffffff;
  --sf-blue: #0066ff;
  --sf-blue-hover: #0052cc;
  --sf-ice: #e6eeff;
  --sf-ice-light: #f3f7ff;
  --sf-coral: #d97757;
  --sf-yellow: #ffd21e;
  --sf-line: #e5e7eb;
}

html { scroll-behavior: smooth; }

body.sf-content-page {
  margin: 0;
  background: var(--sf-white);
  color: var(--sf-ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.sf-skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  transform: translateY(-150%);
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--sf-ink);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.sf-skip-link:focus { transform: translateY(0); }

.sf-wrap {
  width: min(100% - 40px, 1344px);
  margin-inline: auto;
}

.sf-hero {
  position: relative;
  isolation: isolate;
  min-height: 760px;
  overflow: hidden;
  background: var(--sf-ice);
}

.sf-hero-picture,
.sf-hero-picture::after {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.sf-hero-picture img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .92;
}

.sf-hero::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background: linear-gradient(90deg, rgba(230, 238, 255, .9) 0%, rgba(230, 238, 255, .68) 48%, rgba(230, 238, 255, .18) 100%);
}

.sf-nav-shell {
  width: min(100% - 24px, 1416px);
  margin: 0 auto;
  padding-top: 12px;
}

.sf-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 52px;
  padding: 5px;
  border: 1px solid rgba(229, 231, 235, .5);
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 2px 12px rgba(0, 0, 0, .02);
}

.sf-nav-left,
.sf-nav-right,
.sf-nav-links,
.sf-nav-phone,
.sf-lang,
.sf-brand,
.sf-footer-brand,
.sf-meta-row,
.sf-author-inline,
.sf-link-arrow {
  display: flex;
  align-items: center;
}

.sf-nav-left { gap: 24px; }
.sf-nav-right { gap: 20px; padding-right: 8px; }
.sf-nav-links { gap: 24px; }
.sf-nav a { text-decoration: none; }

.sf-brand {
  gap: 10px;
  color: var(--sf-ink);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: -.01em;
  text-transform: uppercase;
}

.sf-brand > span:last-child { display: none; }

.sf-mark {
  display: grid;
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 50%;
  background: var(--sf-ink);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
}

.sf-nav-links a {
  color: var(--sf-ink);
  font-size: 14px;
  font-weight: 650;
  transition: color .2s ease;
}

.sf-nav-links a:hover,
.sf-nav-links a[aria-current="page"] { color: var(--sf-blue); }

.sf-nav-phone {
  gap: 6px;
  color: var(--sf-coral);
  font-size: 14px;
  font-weight: 750;
}

.sf-lang {
  gap: 4px;
  height: 24px;
  padding-left: 16px;
  border-left: 1px solid var(--sf-line);
  color: #9ca3af;
  font-size: 13px;
  font-weight: 750;
}

.sf-lang strong { color: var(--sf-ink); }

.sf-nav-cta,
.sf-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 750;
  text-decoration: none;
  transition: background .2s ease, transform .2s ease;
}

.sf-nav-cta {
  padding: 8px 8px 8px 20px;
  background: var(--sf-ink);
  color: #fff;
}

.sf-nav-cta:hover { background: #1f2937; }

.sf-arrow-disc {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  background: #fff;
  color: var(--sf-ink);
  transition: transform .3s ease;
}

.sf-nav-cta:hover .sf-arrow-disc,
.sf-button:hover .sf-arrow-disc { transform: rotate(-45deg); }

.sf-mobile-nav { display: none; position: relative; }
.sf-mobile-nav summary { list-style: none; }
.sf-mobile-nav summary::-webkit-details-marker { display: none; }
.sf-mobile-toggle {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 50%;
  background: var(--sf-ink);
  color: #fff;
  cursor: pointer;
}
.sf-mobile-panel {
  position: absolute;
  top: 48px;
  right: 0;
  display: grid;
  width: min(310px, calc(100vw - 32px));
  gap: 2px;
  padding: 12px;
  border: 1px solid var(--sf-line);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 20px 50px rgba(17, 24, 39, .16);
}
.sf-mobile-panel a {
  padding: 12px 14px;
  border-radius: 12px;
  color: var(--sf-ink);
  font-size: 16px;
  font-weight: 700;
}
.sf-mobile-panel a:hover { background: var(--sf-soft); }

.sf-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(380px, .78fr);
  gap: clamp(48px, 6vw, 96px);
  align-items: center;
  padding-top: clamp(72px, 8vw, 118px);
  padding-bottom: clamp(72px, 9vw, 126px);
}

.sf-hero-grid > * { min-width: 0; }

.sf-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  color: var(--sf-ink);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.sf-kicker::before {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--sf-blue);
  content: "";
}

.sf-hero h1,
.sf-about-hero h1 {
  margin: 0;
  color: var(--sf-ink);
  font-size: clamp(2.65rem, 5.3vw, 5.25rem);
  font-weight: 650;
  letter-spacing: -.045em;
  line-height: 1.01;
  overflow-wrap: break-word;
}

.sf-hero-lede {
  max-width: 760px;
  margin: 28px 0 0;
  color: #374151;
  font-size: clamp(1.06rem, 1.55vw, 1.25rem);
  font-weight: 600;
  line-height: 1.62;
}

.sf-meta-row {
  flex-wrap: wrap;
  gap: 12px 18px;
  margin-top: 30px;
  color: var(--sf-muted);
  font-size: 13px;
  font-weight: 650;
}

.sf-meta-row > span + span::before {
  margin-right: 18px;
  color: #9ca3af;
  content: "•";
}

.sf-author-inline { gap: 10px; color: var(--sf-ink); text-decoration: none; }
.sf-author-initials {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--sf-ink);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
}

.sf-hero-art {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .55);
  border-radius: 26px;
  background: var(--sf-ink-deep);
  box-shadow: 0 30px 80px rgba(17, 24, 39, .18);
}

.sf-hero-art::after {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: inherit;
  content: "";
  pointer-events: none;
}

.sf-hero-art img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.sf-main {
  background: #fff;
}

.sf-article-layout {
  display: grid;
  grid-template-columns: minmax(0, 780px) 250px;
  gap: clamp(64px, 8vw, 120px);
  justify-content: center;
  padding-top: 84px;
  padding-bottom: 112px;
}

.sf-article {
  min-width: 0;
  color: #273244;
}

.sf-article p,
.sf-article li,
.sf-article td,
.sf-article th {
  font-size: 17px;
}

.sf-article p { margin: 0 0 22px; }
.sf-article strong { color: var(--sf-ink); font-weight: 750; }

.sf-answer {
  margin-bottom: 54px;
  padding: 28px 30px;
  border: 1px solid #cddcff;
  border-left: 5px solid var(--sf-blue);
  border-radius: 0 16px 16px 0;
  background: var(--sf-ice-light);
  color: var(--sf-ink);
  font-size: 19px;
  font-weight: 650;
  line-height: 1.62;
}

.sf-article h2 {
  margin: 64px 0 18px;
  color: var(--sf-ink);
  font-size: clamp(1.75rem, 3vw, 2.45rem);
  font-weight: 700;
  letter-spacing: -.035em;
  line-height: 1.15;
}

.sf-article h3 {
  margin: 34px 0 10px;
  color: var(--sf-ink);
  font-size: 1.2rem;
  font-weight: 750;
  line-height: 1.35;
}

.sf-article a {
  color: var(--sf-blue-hover);
  font-weight: 650;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.sf-article ul,
.sf-article ol {
  display: grid;
  gap: 12px;
  margin: 22px 0 28px;
  padding-left: 25px;
}
.sf-article ul { list-style: disc; }
.sf-article ol { list-style: decimal; }
.sf-article li { padding-left: 5px; }

.sf-evidence-note {
  margin: 34px 0;
  padding: 28px;
  border-radius: 20px;
  background: var(--sf-ink-deep);
  color: #e5e7eb;
}
.sf-evidence-note .sf-label {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--sf-yellow);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.sf-evidence-note h2 {
  margin: 0 0 12px;
  color: #fff;
  font-size: 1.55rem;
}
.sf-evidence-note p:last-child { margin-bottom: 0; }

.sf-traffic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 30px 0 42px;
}
.sf-traffic-card {
  padding: 22px;
  border: 1px solid var(--sf-line);
  border-radius: 16px;
  background: #fff;
}
.sf-traffic-card::before {
  display: block;
  width: 10px;
  height: 10px;
  margin-bottom: 14px;
  border-radius: 50%;
  content: "";
}
.sf-traffic-card.green::before { background: #10a37f; }
.sf-traffic-card.amber::before { background: #d89a24; }
.sf-traffic-card.red::before { background: #d04c4c; }
.sf-traffic-card h3 { margin: 0 0 8px; font-size: 16px; }
.sf-traffic-card p { margin: 0; color: var(--sf-muted); font-size: 14px; line-height: 1.55; }

.sf-table-wrap {
  overflow-x: auto;
  margin: 28px 0 46px;
  border: 1px solid var(--sf-line);
  border-radius: 18px;
  background: #fff;
}
.sf-control-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}
.sf-control-table th,
.sf-control-table td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--sf-line);
  text-align: left;
  vertical-align: top;
  line-height: 1.52;
}
.sf-control-table th {
  background: var(--sf-soft);
  color: var(--sf-ink);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.sf-control-table td:first-child {
  width: 28%;
  color: var(--sf-ink);
  font-weight: 750;
}
.sf-control-table td:nth-child(2) { width: 46%; }
.sf-control-table td:last-child { color: var(--sf-muted); font-size: 15px; }
.sf-control-table tr:last-child td { border-bottom: 0; }
.sf-control-num {
  display: inline-grid;
  width: 25px;
  height: 25px;
  margin-right: 8px;
  place-items: center;
  border-radius: 50%;
  background: var(--sf-ink);
  color: #fff;
  font-size: 11px;
}

.sf-pilot {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  overflow: hidden;
  margin: 28px 0 46px;
  border: 1px solid var(--sf-line);
  border-radius: 18px;
  background: var(--sf-line);
}
.sf-pilot-step { padding: 22px; background: #fff; }
.sf-pilot-step span {
  color: var(--sf-blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.sf-pilot-step h3 { margin: 8px 0 8px; font-size: 16px; }
.sf-pilot-step p { margin: 0; color: var(--sf-muted); font-size: 14px; line-height: 1.55; }

.sf-faq { margin-top: 34px; }
.sf-faq details {
  border-top: 1px solid var(--sf-line);
}
.sf-faq details:last-child { border-bottom: 1px solid var(--sf-line); }
.sf-faq summary {
  position: relative;
  padding: 21px 46px 21px 0;
  color: var(--sf-ink);
  font-size: 17px;
  font-weight: 750;
  cursor: pointer;
  list-style: none;
}
.sf-faq summary::-webkit-details-marker { display: none; }
.sf-faq summary::after {
  position: absolute;
  top: 19px;
  right: 2px;
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  background: var(--sf-soft);
  content: "+";
}
.sf-faq details[open] summary::after { content: "−"; }
.sf-faq details p { padding: 0 48px 22px 0; }

.sf-sources {
  margin-top: 64px;
  padding-top: 36px;
  border-top: 1px solid var(--sf-line);
}
.sf-sources h2 { margin-top: 0; }
.sf-sources li { font-size: 15px; }

.sf-disclaimer {
  margin-top: 34px;
  padding: 20px 22px;
  border-radius: 14px;
  background: #fff5f1;
  color: #694638;
  font-size: 14px !important;
}
.sf-ai-disclosure {
  margin-top: 14px !important;
  padding: 17px 20px;
  border: 1px solid var(--sf-line);
  border-radius: 14px;
  background: var(--sf-soft);
  color: var(--sf-muted);
  font-size: 14px !important;
}

.sf-author-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  align-items: center;
  margin-top: 56px;
  padding: 28px;
  border: 1px solid var(--sf-line);
  border-radius: 20px;
  background: var(--sf-soft);
}
.sf-author-card .sf-author-initials { width: 56px; height: 56px; font-size: 15px; }
.sf-author-card h2 { margin: 0 0 5px; font-size: 1.3rem; }
.sf-author-card p { margin: 0 0 8px; color: var(--sf-muted); font-size: 15px; }
.sf-author-card a { font-size: 14px; }

.sf-cta {
  position: relative;
  overflow: hidden;
  margin-top: 54px;
  padding: 38px;
  border-radius: 24px;
  background: #1a1d2e;
  color: #fff;
}
.sf-cta::after {
  position: absolute;
  top: -120px;
  right: -100px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(217, 119, 87, .12);
  filter: blur(45px);
  content: "";
}
.sf-cta > * { position: relative; z-index: 1; }
.sf-cta h2 { margin: 0 0 10px; color: #fff; font-size: 1.9rem; }
.sf-cta p { max-width: 600px; color: #d1d5db; }
.sf-button {
  padding: 11px 12px 11px 20px;
  background: var(--sf-blue);
  color: #fff !important;
}
.sf-button:hover { background: var(--sf-blue-hover); }

.sf-aside {
  align-self: start;
  position: sticky;
  top: 24px;
  padding-top: 18px;
  border-top: 2px solid var(--sf-ink);
}
.sf-aside h2 {
  margin: 0 0 14px;
  color: var(--sf-ink);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.sf-aside nav { display: grid; }
.sf-aside a {
  padding: 8px 0;
  color: var(--sf-muted);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.35;
  text-decoration: none;
}
.sf-aside a:hover { color: var(--sf-blue); }

.sf-about-hero {
  position: relative;
  overflow: hidden;
  padding: 104px 0 112px;
  background: var(--sf-ice);
}

body.sf-content-page > .sf-nav-shell {
  position: relative;
  z-index: 10;
  margin-bottom: -64px;
}
.sf-about-hero::before {
  position: absolute;
  inset: 0;
  background: url('/assets/hero/hero-desktop-v1.webp') center / cover;
  content: "";
  opacity: .56;
}
.sf-about-hero .sf-wrap { position: relative; }
.sf-about-hero p { max-width: 780px; margin: 28px 0 0; color: #374151; font-size: 20px; font-weight: 600; }
.sf-about-main { padding: 88px 0 112px; }
.sf-about-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 390px); gap: 84px; }
.sf-about-copy { max-width: 760px; }
.sf-about-copy h2 { margin: 0 0 18px; color: var(--sf-ink); font-size: 2.2rem; line-height: 1.15; }
.sf-about-copy p { margin: 0 0 22px; color: #273244; font-size: 17px; }
.sf-fact-card { align-self: start; padding: 30px; border-radius: 22px; background: var(--sf-ink-deep); color: #fff; }
.sf-fact-card .sf-author-initials { width: 58px; height: 58px; margin-bottom: 22px; background: var(--sf-yellow); color: var(--sf-ink); font-size: 15px; }
.sf-fact-card h2 { margin: 0 0 5px; font-size: 1.5rem; }
.sf-fact-card p { margin: 0 0 18px; color: #d1d5db; }
.sf-fact-card a { color: var(--sf-yellow); font-weight: 700; text-underline-offset: 3px; }

.sf-footer {
  padding: 48px 0;
  border-top: 1px solid var(--sf-line);
  background: #fff;
}
.sf-footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.sf-footer-brand { gap: 12px; color: var(--sf-ink); font-size: 14px; font-weight: 800; text-transform: uppercase; }
.sf-footer .sf-mark { width: 32px; height: 32px; font-size: 10px; }
.sf-footer-cta { color: var(--sf-blue); font-size: 14px; font-weight: 700; text-decoration: none; }
.sf-footer-copy { color: #9ca3af; font-size: 13px; font-weight: 650; }

.sf-related {
  margin-top: 54px;
  padding: 30px;
  border: 1px solid var(--sf-line);
  border-radius: 20px;
  background: var(--sf-ice-light);
}
.sf-related h2 { margin: 0 0 14px; font-size: 1.45rem; }
.sf-related ul { margin: 0; padding-left: 20px; }
.sf-related a { font-size: 16px; }
.sf-insights-main { padding: 96px 0 112px; }
.sf-insights-intro { max-width: 720px; margin-bottom: 48px; }
.sf-insights-intro h2 { margin: 0 0 14px; font-size: clamp(2rem, 3.4vw, 3rem); line-height: 1.1; letter-spacing: -.04em; }
.sf-insights-intro p { margin: 0; color: var(--sf-muted); font-size: 18px; }
.sf-insights-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.sf-insight-card { overflow: hidden; border: 1px solid var(--sf-line); border-radius: 22px; background: #fff; }
.sf-insight-card img { display: block; width: 100%; aspect-ratio: 16 / 8; object-fit: cover; background: var(--sf-ink-deep); }
.sf-insight-card > div { padding: 26px; }
.sf-insight-card p { margin: 0 0 12px; color: var(--sf-muted); font-size: 15px; line-height: 1.55; }
.sf-insight-card > div > p:first-child { color: var(--sf-blue); font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.sf-insight-card h2 { margin: 0 0 12px; color: var(--sf-ink); font-size: 1.55rem; line-height: 1.16; letter-spacing: -.025em; }
.sf-insight-card h2 a { color: inherit; text-decoration: none; }
.sf-insight-card h2 a:hover { color: var(--sf-blue); }
.sf-link-arrow { gap: 8px; color: var(--sf-blue); font-size: 14px; font-weight: 800; text-decoration: none; }

@media (max-width: 1080px) {
  .sf-nav-phone { display: none; }
  .sf-hero-grid { grid-template-columns: 1fr 420px; gap: 44px; }
  .sf-article-layout { grid-template-columns: minmax(0, 760px); }
  .sf-aside { display: none; }
  .sf-pilot { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  .sf-nav-links,
  .sf-nav-right { display: none; }
  .sf-mobile-nav { display: block; }
  .sf-hero { min-height: auto; }
  .sf-hero::after { background: rgba(230, 238, 255, .68); }
  .sf-hero-grid { grid-template-columns: 1fr; padding-top: 72px; padding-bottom: 72px; }
  .sf-hero-art { max-width: 620px; }
  .sf-article-layout { padding-top: 64px; padding-bottom: 88px; }
  .sf-traffic-grid { grid-template-columns: 1fr; }
  .sf-about-grid { grid-template-columns: 1fr; gap: 48px; }
  .sf-footer-row { flex-direction: column; align-items: flex-start; }
  .sf-insights-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .sf-wrap { width: min(100% - 32px, 1344px); }
  .sf-nav-shell { width: min(100% - 16px, 1416px); padding-top: 8px; }
  .sf-brand span:last-child { display: none; }
  .sf-mark { width: 38px; height: 38px; }
  .sf-hero-grid { gap: 38px; padding-top: 56px; padding-bottom: 58px; }
  .sf-hero h1,
  .sf-about-hero h1 { font-size: clamp(2.35rem, 12vw, 3.55rem); }
  .sf-meta-row { display: grid; gap: 9px; }
  .sf-meta-row > span + span::before { display: none; }
  .sf-article-layout { padding-top: 48px; }
  .sf-answer { padding: 22px; font-size: 17px; }
  .sf-article p,
  .sf-article li { font-size: 16px; }
  .sf-article h2 { margin-top: 52px; }
  .sf-pilot { grid-template-columns: 1fr; }
  .sf-cta { padding: 28px 24px; }
  .sf-author-card { grid-template-columns: 1fr; }
  .sf-about-hero { padding: 78px 0 86px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}