:root {
  --ink: #07110e;
  --ink-2: #0f1f19;
  --fog: #9bb5a8;
  --paper: #e7f0ea;
  --signal: #c8ff4d;
  --signal-dim: rgba(200, 255, 77, 0.18);
  --copper: #d08a4c;
  --line: rgba(231, 240, 234, 0.12);
  --text: #eef6f1;
  --muted: #93aa9e;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --font-display: "Outfit", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Outfit", system-ui, sans-serif;
  --max: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img, canvas { display: block; max-width: 100%; }

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--signal);
  color: var(--ink);
  padding: 0.6rem 1rem;
  z-index: 100;
}
.skip:focus { left: 1rem; top: 1rem; }

.wrap {
  width: min(var(--max), calc(100% - 2.5rem));
  margin-inline: auto;
}

/* Top bar */
.top {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: linear-gradient(180deg, rgba(7, 17, 14, 0.88), rgba(7, 17, 14, 0.35) 70%, transparent);
}

.top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.25rem;
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.08em;
  font-size: 1.05rem;
}

.mark-logo {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 0.45rem;
  flex: none;
}

.mark-text { letter-spacing: 0.08em; }

.mark-sub {
  display: none;
  margin-left: 0.15rem;
  padding-left: 0.55rem;
  border-left: 1px solid var(--line);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  color: var(--signal);
}

@media (min-width: 720px) {
  .mark-sub { display: inline; }
}

.mark-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 6px var(--signal-dim);
  animation: pulse 2.8s ease-in-out infinite;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
  font-size: 0.92rem;
  color: var(--fog);
}

.nav a:hover { color: var(--text); }

.nav-cta {
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text) !important;
}

.nav-cta:hover {
  border-color: var(--signal);
  background: var(--signal-dim);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
}

.hero-graph {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse 70% 55% at 70% 35%, rgba(200, 255, 77, 0.08), transparent 55%),
    linear-gradient(180deg, rgba(7, 17, 14, 0.15) 0%, rgba(7, 17, 14, 0.55) 48%, rgba(7, 17, 14, 0.96) 100%);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 2;
  padding: 7.5rem 0 5.5rem;
  max-width: 42rem;
  animation: rise 1.1s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero-kicker {
  margin: 0 0 0.85rem;
  color: var(--copper);
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: lowercase;
  font-size: 0.82rem;
}

.hero-brand {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(4.6rem, 16vw, 8.5rem);
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: #f5fff8;
  text-shadow: 0 10px 60px rgba(0, 0, 0, 0.35);
}

.hero-title {
  margin: 1rem 0 0;
  font-size: clamp(1.45rem, 3.4vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--signal);
}

.hero-lead {
  margin: 1.35rem 0 0;
  max-width: 34rem;
  color: var(--fog);
  font-size: 1.05rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0 1.35rem;
  border-radius: 999px;
  font-weight: 700;
  font-family: var(--font-display);
  letter-spacing: 0.04em;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--signal);
  color: var(--ink);
  box-shadow: 0 0 0 0 var(--signal-dim);
}

.btn-primary:hover {
  box-shadow: 0 0 0 10px var(--signal-dim);
}

.btn-ghost {
  border: 1px solid rgba(231, 240, 234, 0.28);
  color: var(--paper);
  background: rgba(15, 31, 25, 0.35);
}

.btn-ghost:hover {
  border-color: var(--signal);
  background: rgba(200, 255, 77, 0.08);
}

.hero-hint {
  position: absolute;
  right: max(1.25rem, calc((100% - var(--max)) / 2));
  bottom: 1.6rem;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.hero-hint span {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--signal);
  animation: pulse 2.2s ease-in-out infinite;
}

/* Panels */
.panel {
  position: relative;
  padding: 5.5rem 0;
}

.panel-ink {
  background:
    linear-gradient(180deg, var(--ink), var(--ink-2));
  border-top: 1px solid var(--line);
}

.panel-paper {
  background: var(--paper);
  color: #13241c;
}

.panel h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.panel-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
}

.panel-copy p {
  margin: 1rem 0 0;
  color: var(--fog);
  max-width: 30rem;
  font-size: 1.05rem;
}

.node-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.node-list li {
  display: grid;
  gap: 0.25rem;
  padding: 1.1rem 1.2rem;
  border-left: 3px solid var(--signal);
  background: rgba(200, 255, 77, 0.05);
}

.node-list strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}

.node-list span {
  color: var(--fog);
  font-size: 0.95rem;
}

.how-lead {
  margin: 0.9rem 0 0;
  color: #4d685a;
  max-width: 34rem;
}

.steps {
  list-style: none;
  margin: 2.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.1rem;
  align-items: start;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgba(19, 36, 28, 0.12);
}

.steps em {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 800;
  color: #7a9a48;
  letter-spacing: 0.06em;
}

.steps strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.steps p {
  margin: 0;
  color: #4d685a;
}

/* Glance path: four words in a row */
.glance-path {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
  counter-reset: glance;
}

.glance-path li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0;
  padding: 1rem 0.85rem;
  border: 1px solid rgba(19, 36, 28, 0.14);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.35);
  counter-increment: glance;
}

.glance-path li::before {
  content: counter(glance);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: #7a9a48;
}

.glance-path strong {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: #13241c;
  margin: 0;
}

.glance-path span {
  color: #4d685a;
  font-size: 0.88rem;
  line-height: 1.4;
}

@media (max-width: 700px) {
  .glance-path { grid-template-columns: 1fr 1fr; }
}

.foot {
  border-top: 1px solid var(--line);
  background: #050c0a;
  padding: 2rem 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.foot-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.foot strong { color: var(--paper); }

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.35); opacity: 0.55; }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 820px) {
  .panel-grid { grid-template-columns: 1fr; gap: 2rem; }
  .hero-copy { padding-bottom: 6.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-copy, .mark-dot, .hero-hint span { animation: none !important; }
}