:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #07100d;
  color: #f2f7f4;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 15% -10%, rgba(63, 221, 159, .15), transparent 30rem), linear-gradient(180deg, #07100d 0%, #091411 62%, #07100d 100%);
  color: #eef7f2;
}
a { color: inherit; text-decoration: none; }

.seoHeader {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 2rem;
  justify-content: space-between;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  border-bottom: 1px solid rgba(255, 255, 255, .09);
  background: rgba(7, 16, 13, .88);
  backdrop-filter: blur(18px);
}
.seoBrand { display: flex; align-items: center; gap: .7rem; letter-spacing: .08em; }
.seoBrand span {
  display: grid;
  place-items: center;
  width: 2.3rem;
  height: 2.3rem;
  border: 1px solid #56e3aa;
  color: #56e3aa;
  font-size: .72rem;
  font-weight: 800;
  transform: skew(-8deg);
}
.seoHeader nav { display: flex; gap: 1.4rem; color: #b7c9bf; font-size: .92rem; }
.seoHeader nav a:hover, .seoFooter a:hover, .seoTextLink:hover, .seoRelated a:hover { color: #68edb8; }
.seoButton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: .75rem 1.1rem;
  border: 1px solid #57e5ad;
  border-radius: 999px;
  background: #57e5ad;
  color: #04100b;
  font-weight: 800;
  box-shadow: 0 0 32px rgba(73, 226, 166, .16);
}
.seoButton:hover { background: #7df0c2; }
.seoButtonSmall { min-height: 2.45rem; padding: .55rem .9rem; font-size: .86rem; }

.seoHero { max-width: 76rem; margin: 0 auto; padding: clamp(5rem, 11vw, 9rem) clamp(1.2rem, 5vw, 5rem) 4rem; }
.seoKicker { margin: 0 0 1rem; color: #68edb8; font-size: .76rem; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.seoHero h1 { max-width: 15ch; margin: 0; font-size: clamp(2.9rem, 7vw, 6.6rem); font-weight: 760; letter-spacing: -.055em; line-height: .98; text-wrap: balance; }
.seoSummary { max-width: 49rem; margin: 1.8rem 0 0; color: #bfd0c7; font-size: clamp(1.08rem, 2vw, 1.35rem); line-height: 1.7; }
.seoActions { display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap; margin-top: 2rem; }
.seoTextLink { color: #d7e5de; font-weight: 700; }
.seoUpdated { margin-top: 2rem; color: #71857a; font-size: .8rem; }
.seoEditorial { display: flex; align-items: center; gap: .45rem; flex-wrap: wrap; margin: .55rem 0 0; color: #91a69b; font-size: .8rem; }
.seoEditorial strong { color: #c5d7cd; }

.seoContent { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 76rem; margin: 0 auto; padding: 0 clamp(1.2rem, 5vw, 5rem) 4rem; gap: 1rem; }
.seoSection { min-height: 14rem; padding: clamp(1.35rem, 3vw, 2.2rem); border: 1px solid rgba(255, 255, 255, .09); border-radius: 1.35rem; background: rgba(255, 255, 255, .035); }
.seoSection h2 { max-width: 24ch; margin: 0 0 1rem; font-size: clamp(1.45rem, 3vw, 2.25rem); letter-spacing: -.03em; }
.seoSection p, .seoSection li { color: #aebfb6; line-height: 1.75; }
.seoSection ul { padding-left: 1.2rem; }
.seoSection li + li { margin-top: .55rem; }
.seoFaq { grid-column: 1 / -1; }
.seoFaq details { border-top: 1px solid rgba(255, 255, 255, .09); padding: 1rem 0; }
.seoFaq summary { cursor: pointer; font-weight: 750; }
.seoFaq details p { margin-bottom: 0; }

.seoRelated { max-width: 70rem; margin: 0 auto 6rem; padding: 2rem clamp(1.2rem, 5vw, 5rem); }
.seoRelated > div { display: flex; gap: .7rem; flex-wrap: wrap; }
.seoRelated a { padding: .6rem .85rem; border: 1px solid rgba(255, 255, 255, .12); border-radius: 999px; color: #c7d6ce; }
.seoCta { max-width: 66rem; margin: 0 auto 6rem; padding: clamp(2rem, 6vw, 5rem); border: 1px solid rgba(94, 237, 181, .28); border-radius: 2rem; background: linear-gradient(140deg, rgba(50, 194, 137, .15), rgba(255, 255, 255, .03)); text-align: center; }
.seoCta h2 { margin: .3rem auto 1rem; font-size: clamp(2rem, 5vw, 4rem); letter-spacing: -.045em; }
.seoCta p:not(.seoKicker) { max-width: 44rem; margin: 0 auto 1.7rem; color: #aec1b7; line-height: 1.7; }
.seoFooter { display: flex; align-items: center; gap: 1.2rem; flex-wrap: wrap; padding: 2rem clamp(1.2rem, 5vw, 5rem); border-top: 1px solid rgba(255, 255, 255, .09); color: #82968b; font-size: .82rem; }
.seoFooter strong { color: #eff8f3; letter-spacing: .08em; }
.seoFooter nav { display: flex; gap: 1rem; margin-left: auto; }
.seoFooter small { width: 100%; }

.seoError { display: grid; place-items: start; align-content: center; max-width: 54rem; min-height: 100vh; margin: auto; padding: 3rem; }
.seoError h1 { margin: 0; font-size: clamp(3rem, 10vw, 7rem); letter-spacing: -.06em; }
.seoError p:not(.seoKicker) { color: #aebfb6; font-size: 1.1rem; }
.seoError .seoButton { margin-top: 1rem; }

@media (max-width: 760px) {
  .seoHeader nav { display: none; }
  .seoHeader { gap: .8rem; }
  .seoContent { grid-template-columns: 1fr; }
  .seoFaq { grid-column: auto; }
  .seoHero { padding-top: 4rem; }
  .seoHero .seoCompactChineseHeading { font-size: clamp(2.55rem, 10.7vw, 2.9rem); word-break: keep-all; }
  .seoFooter nav { width: 100%; margin-left: 0; }
  .seoButtonSmall { font-size: .78rem; }
  .seoBrand strong { font-size: .9rem; }
}