:root {
  --ink: #0c1412;
  --ink-soft: #16201c;
  --fog: #e8efe9;
  --mist: #b7c5bc;
  --jade: #2f8f6b;
  --jade-bright: #3cb88a;
  --gold: #c4a35a;
  --line: rgba(232, 239, 233, 0.12);
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--fog);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  background:
    radial-gradient(1200px 700px at 12% -10%, rgba(47, 143, 107, 0.28), transparent 55%),
    radial-gradient(900px 600px at 88% 8%, rgba(196, 163, 90, 0.16), transparent 50%),
    linear-gradient(165deg, #07100e 0%, var(--ink) 42%, #101a17 100%);
  min-height: 100vh;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a {
  color: inherit;
  text-decoration: none;
}

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  isolation: isolate;
}

.hero__glow {
  position: absolute;
  inset: auto -20% 10% 40%;
  height: 55%;
  background: radial-gradient(ellipse at center, rgba(60, 184, 138, 0.22), transparent 65%);
  animation: drift 12s ease-in-out infinite alternate;
  z-index: -1;
}

.hero__grid {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent 85%);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem clamp(1.25rem, 4vw, 3.5rem);
}

.nav__brand {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  color: var(--jade-bright);
}

.nav__links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.92rem;
  color: var(--mist);
}

.nav__links a:hover {
  color: var(--fog);
}

.hero__content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem clamp(1.25rem, 4vw, 3.5rem) 5rem;
  max-width: 920px;
  animation: rise 0.9s ease-out both;
}

.hero__eyebrow {
  margin: 0 0 1rem;
  color: var(--gold);
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.04em;
}

.hero__lead {
  margin: 1.25rem 0 0;
  max-width: 36rem;
  color: var(--mist);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  border: 1px solid transparent;
  font-size: 0.95rem;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--jade);
  color: #f4fbf7;
}

.btn--primary:hover {
  background: var(--jade-bright);
}

.btn--ghost {
  border-color: rgba(232, 239, 233, 0.28);
  color: var(--fog);
}

.btn--ghost:hover {
  border-color: var(--jade-bright);
}

.section {
  padding: clamp(4rem, 10vw, 7rem) clamp(1.25rem, 4vw, 3.5rem);
}

.section__head {
  max-width: 40rem;
  margin-bottom: 2.5rem;
}

.section__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  letter-spacing: 0.06em;
}

.section__head p {
  margin: 0.9rem 0 0;
  color: var(--mist);
}

.scope__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.scope__item {
  background: rgba(12, 20, 18, 0.72);
  padding: 1.6rem 1.4rem 1.8rem;
  animation: rise 0.7s ease-out both;
  animation-delay: calc(var(--i) * 0.08s);
}

.scope__item--wide {
  grid-column: 1 / -1;
}

.scope__index {
  display: block;
  margin-bottom: 0.7rem;
  color: var(--gold);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
}

.scope__item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.scope__item p {
  margin: 0.7rem 0 0;
  color: var(--mist);
  font-size: 0.95rem;
}

.scope__note {
  margin: 1.25rem 0 0;
  color: rgba(183, 197, 188, 0.75);
  font-size: 0.85rem;
}

.about__panel {
  max-width: 860px;
  padding: clamp(1.8rem, 4vw, 3rem);
  border-top: 1px solid rgba(60, 184, 138, 0.35);
  background:
    linear-gradient(135deg, rgba(47, 143, 107, 0.12), transparent 45%),
    rgba(22, 32, 28, 0.75);
}

.about__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.4rem 2rem;
  margin: 0;
}

.about__meta dt {
  color: var(--gold);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}

.about__meta dd {
  margin: 0.35rem 0 0;
  font-size: 1rem;
}

.footer {
  padding: 2.5rem clamp(1.25rem, 4vw, 3.5rem) 2rem;
  border-top: 1px solid var(--line);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  align-items: flex-start;
}

.footer__brand {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
}

.footer__copy,
.footer__beian {
  margin: 0;
  color: var(--mist);
  font-size: 0.88rem;
}

.footer__beian a {
  color: var(--mist);
  border-bottom: 1px solid rgba(183, 197, 188, 0.45);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer__beian a:hover {
  color: var(--jade-bright);
  border-color: var(--jade-bright);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drift {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }
  to {
    transform: translate3d(-6%, -4%, 0) scale(1.08);
  }
}

@media (max-width: 720px) {
  .nav__links {
    gap: 1rem;
    font-size: 0.85rem;
  }

  .scope__list,
  .about__meta {
    grid-template-columns: 1fr;
  }

  .hero__actions {
    width: 100%;
  }

  .btn {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero__content,
  .scope__item,
  .hero__glow {
    animation: none;
  }
}