:root {
  --void: #05040a;
  --night: #0b0914;
  --panel: #15121f;
  --panel-2: #1d1830;
  --line: rgba(212, 175, 106, 0.28);
  --gold: #e0c07a;
  --gold-dim: #a8894f;
  --ink: #f6f0fa;
  --ink-2: #c9bdd8;
  --ink-3: #857895;
  --font-ui: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Noto Serif SC", "Songti SC", "STSong", serif;
  --max: 1080px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-ui);
  background: var(--void);
  line-height: 1.65;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding-left: 1.1rem; }
h1, h2, h3, strong { font-weight: 600; }

.sky {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 90% 55% at 50% -12%, rgba(168, 120, 255, 0.22), transparent 58%),
    radial-gradient(ellipse 50% 40% at 100% 0%, rgba(212, 175, 106, 0.1), transparent 50%),
    linear-gradient(180deg, #07060f 0%, var(--void) 45%, #08070f 100%);
}
#stars { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.7; }
.mist {
  position: absolute;
  width: 55vw;
  height: 55vw;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: drift 18s ease-in-out infinite alternate;
}
.mist-a {
  top: -10%;
  left: -8%;
  background: radial-gradient(circle, rgba(120, 90, 200, 0.45), transparent 70%);
}
.mist-b {
  right: -12%;
  bottom: 10%;
  background: radial-gradient(circle, rgba(212, 175, 106, 0.22), transparent 70%);
  animation-duration: 24s;
  animation-delay: -6s;
}
@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(4%, 3%, 0) scale(1.08); }
}

.top, main, .foot { position: relative; z-index: 1; }
.top {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: calc(var(--max) + 4rem);
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
}
.brand { display: inline-flex; align-items: center; gap: 0.65rem; min-width: 0; }
.brand-mark {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fff6e0, var(--gold) 45%, #6a4a18 100%);
  box-shadow: 0 0 18px rgba(224, 192, 122, 0.55);
}
.brand-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}
.nav {
  display: none;
  gap: 1.4rem;
  margin-left: auto;
  margin-right: 0.5rem;
  color: var(--ink-2);
  font-size: 0.92rem;
}
.nav a:hover { color: var(--gold); }
.top > .btn-sm { margin-left: auto; }
@media (min-width: 860px) {
  .nav { display: flex; }
  .top > .btn-sm { margin-left: 0; }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  background: linear-gradient(180deg, #e2c078, #9a7438);
  color: #1a1208;
  font-weight: 600;
  letter-spacing: 0.06em;
  box-shadow: 0 0 24px rgba(224, 192, 122, 0.28);
  transition: transform 180ms ease, box-shadow 180ms ease, filter 180ms ease;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 32px rgba(224, 192, 122, 0.42);
  filter: brightness(1.05);
}
.btn-sm { min-height: 2.25rem; padding: 0 1rem; font-size: 0.88rem; }
.btn-ghost {
  background: transparent;
  color: var(--gold);
  border-color: color-mix(in srgb, var(--gold) 45%, transparent);
  box-shadow: none;
}
.btn-ghost:hover {
  background: rgba(224, 192, 122, 0.08);
  box-shadow: none;
  filter: none;
}

.hero {
  min-height: calc(100svh - 4.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  max-width: calc(var(--max) + 4rem);
  margin: 0 auto;
  padding: 3rem 1.5rem 4.5rem;
}
.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--gold-dim);
  letter-spacing: 0.28em;
  font-size: 0.78rem;
}
.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 9vw, 5.2rem);
  line-height: 1.08;
  letter-spacing: 0.16em;
  color: var(--gold);
  text-shadow: 0 0 40px rgba(224, 192, 122, 0.18);
}
.lead {
  max-width: 28rem;
  margin: 1.35rem 0 0;
  color: var(--ink-2);
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
}
.cta-row { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-top: 2rem; }
.fine { margin: 1.25rem 0 0; color: var(--ink-3); font-size: 0.86rem; }

.section {
  max-width: calc(var(--max) + 4rem);
  margin: 0 auto;
  padding: 4.5rem 1.5rem;
}
.section-head { max-width: 40rem; margin-bottom: 2.2rem; }
.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  letter-spacing: 0.06em;
  line-height: 1.25;
}
.sub { margin: 0.85rem 0 0; color: var(--ink-2); }

.triad, .scope-grid { display: grid; gap: 1rem; }
@media (min-width: 800px) {
  .triad, .scope-grid { grid-template-columns: repeat(3, 1fr); }
}

.panel, .scope {
  padding: 1.35rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(160deg, color-mix(in srgb, var(--gold) 7%, var(--panel)), var(--panel));
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.28);
}
.panel h3, .scope h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  color: var(--gold);
  letter-spacing: 0.08em;
}
.panel p, .scope li { margin: 0; color: var(--ink-2); font-size: 0.95rem; }
.scope ul { display: grid; gap: 0.45rem; }
.scope li::marker { color: var(--gold-dim); }

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.85rem; }
.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1.1rem 1.2rem;
  border-left: 1px solid color-mix(in srgb, var(--gold) 35%, transparent);
  background: color-mix(in srgb, var(--panel) 70%, transparent);
}
.step .n { font-family: var(--font-display); color: var(--gold); letter-spacing: 0.08em; }
.step strong {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--font-display);
  letter-spacing: 0.06em;
}
.step p { margin: 0; color: var(--ink-2); font-size: 0.95rem; }

.closing { padding: 2rem 1.5rem 5rem; }
.closing-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3rem 1.5rem;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    radial-gradient(ellipse 70% 80% at 50% 0%, rgba(168, 120, 255, 0.16), transparent 60%),
    linear-gradient(180deg, var(--panel-2), var(--panel));
}
.closing-inner h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  letter-spacing: 0.14em;
  color: var(--gold);
}
.closing-inner p { max-width: 28rem; margin: 1rem auto 1.8rem; color: var(--ink-2); }

.foot {
  max-width: calc(var(--max) + 4rem);
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  color: var(--ink-3);
  font-size: 0.88rem;
}
.foot-brand {
  font-family: var(--font-display);
  color: var(--gold-dim);
  letter-spacing: 0.14em;
  margin-bottom: 0.5rem;
}
.copy { margin-top: 1.2rem; }

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms ease, transform 700ms ease;
}
.reveal.is-in { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .mist { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}