@import "tailwindcss";

:root {
  --ink: #07110f;
  --deep: #06100e;
  --panel: #0b1815;
  --panel-2: #10231e;
  --paper: #eff4ed;
  --paper-2: #e4ebe1;
  --line: rgba(255, 255, 255, 0.11);
  --dark-line: rgba(7, 17, 15, 0.13);
  --muted: #8ca39c;
  --green: #58f2c7;
  --green-deep: #0b936f;
  --cyan: #65dff5;
  --violet: #a78bfa;
  --amber: #ffca6a;
  --glow-rgb: 88, 242, 199;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--deep);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  overflow-x: hidden;
}

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

button {
  color: inherit;
  font: inherit;
}

.shell {
  width: min(1280px, calc(100% - 64px));
  margin: 0 auto;
}

.hero {
  min-height: 860px;
  position: relative;
  overflow: hidden;
  color: #f4fbf7;
  background:
    radial-gradient(circle at 72% 30%, rgba(17, 126, 94, 0.28), transparent 33%),
    radial-gradient(circle at 8% 75%, rgba(101, 223, 245, 0.08), transparent 26%),
    linear-gradient(135deg, #06100e 0%, #0a1714 48%, #08130f 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, black, transparent 86%);
}

.hero::after {
  content: "";
  position: absolute;
  width: 720px;
  height: 720px;
  right: -240px;
  top: 80px;
  border: 1px solid rgba(88, 242, 199, 0.12);
  border-radius: 50%;
  box-shadow:
    0 0 0 90px rgba(88, 242, 199, 0.025),
    0 0 0 180px rgba(88, 242, 199, 0.018);
}

.network-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.85;
}

.nav {
  height: 96px;
  position: relative;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand > span,
.footer-brand > div {
  display: flex;
  flex-direction: column;
}

.brand b {
  font-size: 17px;
  letter-spacing: 0.12em;
}

.brand small {
  margin-top: 4px;
  color: #7e9b92;
  font-family: var(--font-geist-mono), monospace;
  font-size: 9px;
  letter-spacing: 0.18em;
}

.app-icon {
  width: 42px;
  height: 42px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(88, 242, 199, 0.38);
  background: rgba(88, 242, 199, 0.08);
}

.rail {
  width: 8px;
  height: 27px;
  position: absolute;
  top: 8px;
  background: var(--green);
  clip-path: polygon(0 0, 100% 0, 65% 100%, 0 100%);
}

.rail-a {
  left: 11px;
}

.rail-b {
  right: 11px;
  transform: scaleX(-1);
}

.rail-spark {
  width: 22px;
  height: 1px;
  position: absolute;
  left: 10px;
  top: 20px;
  background: #dffff6;
  box-shadow: 0 0 12px var(--green);
  transform: rotate(-13deg);
}

.nav-links {
  display: flex;
  gap: 44px;
  color: #9bb2aa;
  font-size: 13px;
}

.nav-links a {
  transition: color 180ms ease;
}

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

.source-button {
  padding: 11px 15px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #bdccc7;
  font-size: 12px;
  transition:
    border-color 180ms ease,
    color 180ms ease;
}

.source-button:hover {
  color: var(--green);
  border-color: rgba(88, 242, 199, 0.5);
}

.hero-content {
  position: relative;
  z-index: 3;
  padding-top: 120px;
}

.eyebrow,
.section-index {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-geist-mono), monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.eyebrow {
  color: var(--green);
}

.live-dot {
  width: 7px;
  height: 7px;
  display: inline-block;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 6px rgba(88, 242, 199, 0.1);
  animation: live 1.5s ease infinite;
}

@keyframes live {
  50% {
    box-shadow: 0 0 0 11px rgba(88, 242, 199, 0);
  }
}

.hero h1 {
  max-width: 1010px;
  margin: 28px 0 0;
  font-size: clamp(50px, 7.1vw, 104px);
  font-weight: 600;
  letter-spacing: -0.065em;
  line-height: 1.04;
}

.hero h1 em {
  color: transparent;
  font-style: normal;
  -webkit-text-stroke: 1.3px rgba(192, 253, 237, 0.78);
  text-shadow: 0 0 42px rgba(88, 242, 199, 0.12);
}

.hero-lede {
  max-width: 690px;
  margin: 34px 0 0;
  color: #9fb3ad;
  font-size: 18px;
  line-height: 1.85;
}

.hero-actions {
  margin-top: 48px;
  display: flex;
  align-items: stretch;
  gap: 18px;
}

.primary-action {
  min-width: 190px;
  padding: 18px 23px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: #042219;
  background: var(--green);
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 14px 38px rgba(38, 210, 162, 0.17);
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.primary-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 45px rgba(38, 210, 162, 0.25);
}

.hero-stat {
  min-width: 170px;
  padding: 13px 19px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-left: 1px solid rgba(255, 255, 255, 0.14);
}

.hero-stat span {
  color: #6f8980;
  font-size: 11px;
}

.hero-stat strong {
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
}

.signal-deck {
  height: 112px;
  position: absolute;
  left: 50%;
  bottom: 0;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  transform: translateX(-50%);
}

.train-line {
  width: min(650px, 66%);
  display: flex;
  justify-content: space-between;
  position: relative;
}

.train-line::before {
  content: "";
  height: 1px;
  position: absolute;
  left: 6px;
  right: 6px;
  top: 6px;
  background: rgba(255, 255, 255, 0.16);
}

.station {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.station > span {
  width: 13px;
  height: 13px;
  border: 2px solid #385249;
  border-radius: 50%;
  background: #0a1613;
  transition: 500ms ease;
}

.station > span.passed {
  border-color: var(--green);
  background: var(--green);
  box-shadow: 0 0 14px rgba(88, 242, 199, 0.65);
}

.station small {
  color: #748b83;
  font-size: 10px;
  white-space: nowrap;
}

.pulse-readout {
  min-width: 280px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  color: #6f8980;
  font-family: var(--font-geist-mono), monospace;
  font-size: 9px;
  letter-spacing: 0.14em;
}

.pulse-readout b {
  color: var(--green);
  font-size: 13px;
}

.pulse-line {
  height: 28px;
  background:
    linear-gradient(90deg, transparent, rgba(88, 242, 199, 0.75), transparent)
      center / 35% 1px no-repeat,
    linear-gradient(90deg, transparent 0 45%, var(--green) 45% 46%, transparent 46%)
      center / 32px 16px repeat-x;
  opacity: 0.6;
  animation: signal 1.4s linear infinite;
}

@keyframes signal {
  to {
    background-position:
      center,
      32px center;
  }
}

.journey-section,
.architecture-section {
  padding: 120px 0;
  background:
    radial-gradient(circle at 5% 20%, rgba(15, 144, 108, 0.08), transparent 24%),
    var(--paper);
}

.section-heading {
  margin-bottom: 50px;
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 80px;
  align-items: end;
}

.section-index {
  color: var(--green-deep);
}

.section-heading h2,
.finale h2 {
  margin: 16px 0 0;
  font-size: clamp(38px, 4.5vw, 67px);
  letter-spacing: -0.05em;
  line-height: 1.08;
}

.section-heading p {
  margin: 0;
  color: #61716b;
  font-size: 14px;
  line-height: 1.8;
}

.simulator {
  overflow: hidden;
  border: 1px solid rgba(7, 17, 15, 0.18);
  background: var(--deep);
  color: #e6f2ee;
  box-shadow: 0 28px 80px rgba(16, 41, 34, 0.16);
}

.sim-topbar {
  min-height: 58px;
  padding: 0 18px 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: #081411;
}

.sim-status {
  display: flex;
  align-items: center;
  gap: 11px;
  font-family: var(--font-geist-mono), monospace;
  font-size: 9px;
  letter-spacing: 0.08em;
}

.sim-status b {
  color: var(--green);
}

.sim-status > span:last-child {
  color: #678078;
}

.status-light {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #52645e;
}

.status-light.active {
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
}

.sim-controls {
  display: flex;
  gap: 6px;
}

.sim-controls button {
  min-width: 34px;
  height: 28px;
  border: 1px solid var(--line);
  color: #7f9890;
  background: transparent;
  font-family: var(--font-geist-mono), monospace;
  font-size: 9px;
  cursor: pointer;
}

.sim-controls button:hover,
.sim-controls button.selected {
  color: #082017;
  border-color: var(--green);
  background: var(--green);
}

.sim-body {
  min-height: 680px;
  display: grid;
  grid-template-columns: 235px 1fr 340px;
}

.stage-rail {
  padding: 28px 17px 28px 20px;
  position: relative;
  border-right: 1px solid var(--line);
}

.rail-progress {
  width: 1px;
  position: absolute;
  left: 39px;
  top: 47px;
  bottom: 47px;
  background: rgba(255, 255, 255, 0.09);
}

.rail-progress span {
  width: 1px;
  display: block;
  background: var(--green);
  box-shadow: 0 0 9px var(--green);
  transition: height 600ms cubic-bezier(0.33, 1, 0.68, 1);
}

.stage-button {
  width: 100%;
  min-height: 61px;
  padding: 8px 6px;
  position: relative;
  display: flex;
  align-items: center;
  gap: 13px;
  border: 0;
  color: #667f77;
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: color 180ms ease;
}

.stage-button:hover {
  color: #d1e1dc;
}

.stage-button.active {
  color: #f3fffb;
}

.stage-button.active::before {
  content: "";
  position: absolute;
  inset: 4px -1px 4px 0;
  border-right: 2px solid var(--green);
  background: linear-gradient(90deg, rgba(88, 242, 199, 0.08), transparent);
}

.stage-number {
  width: 31px;
  height: 31px;
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border: 1px solid #283c36;
  border-radius: 50%;
  background: #081410;
  font-family: var(--font-geist-mono), monospace;
  font-size: 9px;
}

.stage-button.done .stage-number,
.stage-button.active .stage-number {
  color: #062017;
  border-color: var(--green);
  background: var(--green);
  box-shadow: 0 0 16px rgba(88, 242, 199, 0.2);
}

.stage-button > span:last-child {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.stage-button b {
  font-size: 11px;
  font-weight: 600;
}

.stage-button small {
  font-family: var(--font-geist-mono), monospace;
  font-size: 7px;
  letter-spacing: 0.1em;
}

.stage-visual {
  min-width: 0;
  padding: 32px 48px 35px;
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(rgba(255, 255, 255, 0.023) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.023) 1px, transparent 1px);
  background-size: 40px 40px;
}

.stage-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 50% 37%, rgba(88, 242, 199, 0.08), transparent 28%);
}

.stage-meta {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-geist-mono), monospace;
  font-size: 9px;
  letter-spacing: 0.15em;
}

.stage-meta > span:first-child {
  color: #6f8880;
}

.color-mint {
  color: var(--green) !important;
}

.color-cyan {
  color: var(--cyan) !important;
}

.color-violet {
  color: var(--violet) !important;
}

.color-amber {
  color: var(--amber) !important;
}

.event-orbit {
  width: 235px;
  height: 235px;
  margin: 32px auto 18px;
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.045);
  border-radius: 50%;
  animation: appear 500ms ease both;
}

@keyframes appear {
  from {
    opacity: 0;
    transform: scale(0.78);
  }
}

.orbit-ring {
  position: absolute;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.ring-one {
  width: 178px;
  height: 178px;
  opacity: 0.22;
  animation: spin 8s linear infinite;
}

.ring-one::before,
.ring-two::before {
  content: "";
  width: 7px;
  height: 7px;
  position: absolute;
  left: 50%;
  top: -4px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 14px currentColor;
}

.ring-two {
  width: 215px;
  height: 215px;
  opacity: 0.12;
  border-style: dashed;
  animation: spin 12s linear infinite reverse;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.event-core {
  width: 118px;
  height: 118px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid rgba(88, 242, 199, 0.45);
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(88, 242, 199, 0.12), transparent 66%),
    #0a1714;
  box-shadow:
    0 0 50px rgba(88, 242, 199, 0.11),
    inset 0 0 25px rgba(88, 242, 199, 0.05);
}

.event-core span {
  color: #6a837b;
  font-family: var(--font-geist-mono), monospace;
  font-size: 10px;
}

.event-core b {
  max-width: 104px;
  color: var(--green);
  font-family: var(--font-geist-mono), monospace;
  font-size: 8px;
  text-align: center;
  overflow-wrap: anywhere;
}

.orbit-particle {
  width: 3px;
  height: 3px;
  position: absolute;
  border-radius: 50%;
  background: #d7fff4;
  box-shadow: 0 0 8px var(--green);
}

.particle-1 {
  left: 24px;
  top: 78px;
}

.particle-2 {
  right: 32px;
  top: 53px;
}

.particle-3 {
  left: 49px;
  bottom: 36px;
}

.particle-4 {
  right: 19px;
  bottom: 86px;
}

.particle-5 {
  left: 101px;
  top: 15px;
}

.particle-6 {
  right: 82px;
  bottom: 12px;
}

.stage-copy {
  position: relative;
  z-index: 2;
  text-align: center;
}

.stage-chip {
  display: inline-block;
  padding: 5px 9px;
  border: 1px solid currentColor;
  font-family: var(--font-geist-mono), monospace;
  font-size: 8px;
  letter-spacing: 0.12em;
}

.stage-copy h3 {
  margin: 15px 0 8px;
  font-size: 25px;
  letter-spacing: -0.035em;
}

.stage-copy p {
  max-width: 520px;
  margin: 0 auto;
  color: #80968f;
  font-size: 12px;
  line-height: 1.75;
}

.seat-strip {
  margin-top: 25px;
  padding-top: 18px;
  position: relative;
  z-index: 2;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.seat-strip-label {
  display: flex;
  justify-content: space-between;
  color: #71877f;
  font-size: 9px;
}

.seat-strip-label code {
  color: #a9c0b8;
  font-family: var(--font-geist-mono), monospace;
}

.segment-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

.segment-grid > div {
  height: 11px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.07);
}

.segment-grid span {
  height: 100%;
  display: block;
  background: rgba(88, 242, 199, 0.13);
  transform: translateX(-100%);
  animation: segment-in 800ms ease forwards;
}

.segment-grid .occupied span {
  background: rgba(255, 202, 106, 0.65);
}

.segment-grid .matched span {
  background: var(--green);
  box-shadow: 0 0 14px var(--green);
}

@keyframes segment-in {
  to {
    transform: translateX(0);
  }
}

.segment-labels {
  margin-top: 7px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  color: #536a62;
  font-family: var(--font-geist-mono), monospace;
  font-size: 7px;
}

.event-console {
  padding: 28px 19px 24px;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--line);
  background: rgba(4, 12, 10, 0.58);
}

.console-heading {
  padding-bottom: 17px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #789087;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-geist-mono), monospace;
  font-size: 8px;
  letter-spacing: 0.14em;
}

.console-heading i {
  height: 1px;
  flex: 1;
  background: var(--line);
}

.console-heading b {
  color: var(--green);
  font-weight: 500;
}

.console-lines {
  padding-top: 12px;
  flex: 1;
}

.console-line {
  min-height: 48px;
  padding: 10px 9px;
  position: relative;
  display: grid;
  grid-template-columns: 68px 62px 1fr;
  gap: 5px;
  align-items: start;
  border-bottom: 1px solid rgba(255, 255, 255, 0.045);
  color: #526a62;
  font-family: var(--font-geist-mono), monospace;
  font-size: 7px;
  animation: log-in 350ms ease both;
}

@keyframes log-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
}

.console-line b {
  font-weight: 500;
}

.console-line code {
  color: #92aaa2;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.console-line > i {
  width: 3px;
  height: 3px;
  position: absolute;
  right: 4px;
  top: 13px;
  border-radius: 50%;
  background: #365048;
}

.console-line > i.latest {
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

.console-foot {
  padding: 18px 7px 0;
  display: flex;
  align-items: end;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  color: #5e776f;
  font-family: var(--font-geist-mono), monospace;
  font-size: 8px;
}

.console-foot b {
  color: var(--green);
  font-size: 18px;
  font-weight: 500;
}

.math-section {
  padding: 120px 0;
  position: relative;
  overflow: hidden;
  color: #edf8f4;
  background:
    radial-gradient(circle at 80% 15%, rgba(101, 223, 245, 0.08), transparent 25%),
    radial-gradient(circle at 12% 82%, rgba(167, 139, 250, 0.07), transparent 22%),
    var(--deep);
}

.math-section::before {
  content: "∑  λ  ∩  P  μ  ≠  0  ∆  ∞  ∫  CAS";
  position: absolute;
  left: -20px;
  top: 160px;
  color: rgba(255, 255, 255, 0.018);
  font-family: Georgia, serif;
  font-size: 170px;
  white-space: nowrap;
  transform: rotate(-6deg);
}

.section-heading.inverse p {
  color: #82968f;
}

.section-heading.inverse .section-index {
  color: var(--green);
}

.formula-stage {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 245px 1fr;
  border: 1px solid var(--line);
  background: rgba(10, 24, 20, 0.72);
}

.formula-tabs {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line);
}

.formula-tabs button {
  min-height: 84px;
  padding: 0 24px;
  position: relative;
  display: flex;
  align-items: center;
  gap: 15px;
  border: 0;
  border-bottom: 1px solid var(--line);
  color: #71857e;
  background: transparent;
  font-size: 12px;
  text-align: left;
  cursor: pointer;
}

.formula-tabs button span {
  color: #3f5850;
  font-family: var(--font-geist-mono), monospace;
  font-size: 9px;
}

.formula-tabs button:hover,
.formula-tabs button.active {
  color: #ecfff9;
  background: linear-gradient(90deg, rgba(88, 242, 199, 0.1), transparent);
}

.formula-tabs button.active::after {
  content: "";
  width: 2px;
  position: absolute;
  top: 0;
  right: -1px;
  bottom: 0;
  background: var(--green);
  box-shadow: 0 0 12px var(--green);
}

.formula-tabs button.active span {
  color: var(--green);
}

.formula-panel {
  min-height: 520px;
  padding: 54px 7%;
  overflow: hidden;
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 36px 36px;
}

.formula-content {
  animation: formula-in 500ms ease both;
}

@keyframes formula-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
}

.formula-tag {
  color: var(--green);
  font-family: var(--font-geist-mono), monospace;
  font-size: 9px;
  letter-spacing: 0.17em;
}

.formula-content h3 {
  margin: 14px 0 0;
  font-size: 25px;
  font-weight: 500;
  letter-spacing: -0.03em;
}

.big-formula {
  margin: 58px 0 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 25px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(26px, 4vw, 54px);
}

.big-formula b {
  color: #5a7169;
  font-weight: 400;
}

.big-formula em {
  color: var(--green);
  font-style: normal;
  text-shadow: 0 0 24px rgba(88, 242, 199, 0.4);
}

.big-formula sub {
  color: #93aaa2;
  font-family: var(--font-geist-mono), monospace;
  font-size: 10px;
}

.big-formula.compact {
  font-size: clamp(22px, 3.4vw, 42px);
}

.big-formula.probability {
  color: var(--green);
  font-size: clamp(25px, 4vw, 48px);
}

.bit-demo {
  max-width: 720px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.bit-demo > div {
  padding: 15px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}

.bit-demo .bit-result {
  grid-column: 1 / -1;
}

.bit-demo label {
  color: #859b93;
  font-size: 10px;
}

.bit-demo code {
  display: flex;
  gap: 5px;
}

.bit-demo code i {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  color: #799088;
  border: 1px solid #2e443d;
  font-family: var(--font-geist-mono), monospace;
  font-size: 9px;
  font-style: normal;
}

.bit-demo code i:not(.hot):first-child,
.bit-demo code i:not(.hot):nth-child(2),
.bit-demo code i:not(.hot):nth-child(3) {
  color: #061b15;
  border-color: var(--green);
  background: var(--green);
}

.bit-demo .bit-result code i {
  color: var(--green);
  border-color: rgba(88, 242, 199, 0.34);
  background: rgba(88, 242, 199, 0.06);
}

.bit-demo .bit-result b {
  color: var(--green);
  font-size: 10px;
}

.queue-demo {
  max-width: 680px;
  margin: 0 auto;
}

.queue-demo > div {
  min-height: 52px;
  padding: 0 18px;
  display: grid;
  grid-template-columns: 70px 160px 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
  color: #6f857d;
  font-size: 10px;
}

.queue-demo code {
  font-family: var(--font-geist-mono), monospace;
}

.queue-demo .winner {
  color: #062018;
  background: var(--green);
  box-shadow: 0 0 30px rgba(88, 242, 199, 0.12);
  animation: queue-pulse 2s ease infinite;
}

@keyframes queue-pulse {
  50% {
    transform: scale(1.012);
  }
}

.prob-chart {
  height: 170px;
  max-width: 720px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 10px;
  border-bottom: 1px solid #40574f;
}

.prob-chart > div {
  position: relative;
  display: flex;
  align-items: end;
}

.prob-chart > div > span {
  width: 100%;
  display: block;
  background: linear-gradient(to top, rgba(88, 242, 199, 0.12), var(--green));
  animation: bar-rise 900ms ease both;
}

@keyframes bar-rise {
  from {
    height: 0;
  }
}

.prob-chart i {
  position: absolute;
  left: 50%;
  color: #c3d7d0;
  font-family: var(--font-geist-mono), monospace;
  font-size: 8px;
  font-style: normal;
  transform: translate(-50%, -6px);
}

.prob-chart small {
  position: absolute;
  left: 50%;
  bottom: -21px;
  color: #657c74;
  font-family: var(--font-geist-mono), monospace;
  font-size: 8px;
  transform: translateX(-50%);
}

.chart-note {
  max-width: 690px;
  margin: 40px auto 0;
  color: #748981;
  font-size: 10px;
  line-height: 1.65;
}

.race-demo {
  max-width: 780px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.5fr 1fr;
  gap: 25px;
  align-items: center;
  color: #82988f;
  font-size: 10px;
}

.race-source,
.race-target {
  padding: 20px 15px;
  border: 1px solid var(--line);
  text-align: center;
}

.race-target {
  color: var(--green);
  border-color: rgba(88, 242, 199, 0.4);
  box-shadow: 0 0 25px rgba(88, 242, 199, 0.08);
}

.race-lines {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.race-lines span {
  padding: 7px 10px;
  border-bottom: 1px dashed #334a42;
}

.race-lines .race-win {
  color: #052018;
  background: var(--green);
  animation: race 2.2s ease infinite;
}

@keyframes race {
  50% {
    transform: translateX(12px);
  }
}

.principle-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
}

.principle-grid article {
  min-height: 185px;
  padding: 29px;
  border-right: 1px solid var(--line);
}

.principle-grid article:last-child {
  border-right: 0;
}

.principle-grid article > span {
  color: var(--green);
  font-family: var(--font-geist-mono), monospace;
  font-size: 9px;
  letter-spacing: 0.12em;
}

.principle-grid h3 {
  margin: 30px 0 10px;
  font-size: 17px;
}

.principle-grid p {
  margin: 0;
  color: #70857e;
  font-size: 11px;
  line-height: 1.75;
}

.architecture-section {
  background:
    radial-gradient(circle at 85% 70%, rgba(11, 147, 111, 0.09), transparent 25%),
    var(--paper);
}

.architecture-map {
  padding: 30px 90px 30px 30px;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--dark-line);
  background:
    linear-gradient(rgba(7, 17, 15, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(7, 17, 15, 0.035) 1px, transparent 1px),
    rgba(255, 255, 255, 0.42);
  background-size: 38px 38px;
}

.architecture-row {
  min-height: 78px;
  margin-bottom: 10px;
  padding: 0 20px;
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 54px minmax(220px, 1fr) 1.8fr 80px;
  gap: 20px;
  align-items: center;
  border: 1px solid rgba(7, 17, 15, 0.12);
  background: rgba(239, 244, 237, 0.86);
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.architecture-row:hover {
  z-index: 4;
  transform: translateX(5px);
  box-shadow: -5px 0 0 var(--green-deep);
}

.architecture-row:last-of-type {
  margin-bottom: 0;
}

.layer-index {
  color: var(--green-deep);
  font-family: var(--font-geist-mono), monospace;
  font-size: 9px;
}

.layer-title {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.layer-title b {
  font-size: 14px;
}

.layer-title span {
  color: #677872;
  font-size: 10px;
}

.layer-nodes {
  display: flex;
  gap: 9px;
}

.layer-nodes i {
  height: 27px;
  flex: 1;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(7, 17, 15, 0.13);
  background: rgba(7, 17, 15, 0.035);
}

.layer-nodes i span {
  width: 5px;
  height: 5px;
  position: absolute;
  left: 8px;
  top: 10px;
  border-radius: 50%;
  background: var(--green-deep);
  box-shadow: 0 0 0 4px rgba(11, 147, 111, 0.1);
}

.layer-nodes i::after {
  content: "";
  height: 1px;
  position: absolute;
  left: 20px;
  right: 7px;
  top: 12px;
  background: rgba(7, 17, 15, 0.15);
}

.architecture-row code {
  color: #7b8b85;
  font-family: var(--font-geist-mono), monospace;
  font-size: 8px;
  text-align: right;
}

.architecture-spine {
  width: 44px;
  position: absolute;
  z-index: 3;
  top: 63px;
  right: 25px;
  bottom: 63px;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: #60736c;
  font-family: var(--font-geist-mono), monospace;
  font-size: 7px;
}

.architecture-spine i {
  width: 1px;
  flex: 1;
  margin: 8px 0;
  position: relative;
  background: var(--green-deep);
}

.architecture-spine i::after {
  content: "";
  width: 7px;
  height: 7px;
  position: absolute;
  left: -3px;
  top: 0;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 11px var(--green-deep);
  animation: spine-packet 3.7s linear infinite;
}

@keyframes spine-packet {
  to {
    top: calc(100% - 7px);
  }
}

.packet {
  width: 14px;
  height: 3px;
  position: absolute;
  z-index: 5;
  right: 68px;
  background: var(--green);
  box-shadow: 0 0 12px var(--green);
  animation: packet-fall 4.8s linear infinite;
}

.packet-a {
  top: 54px;
}

.packet-b {
  top: 54px;
  animation-delay: -1.6s;
}

.packet-c {
  top: 54px;
  animation-delay: -3.2s;
}

@keyframes packet-fall {
  to {
    transform: translateY(430px);
  }
}

.architecture-notes {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--dark-line);
}

.architecture-notes > div {
  padding: 28px;
  border-right: 1px solid var(--dark-line);
}

.architecture-notes > div:last-child {
  border-right: 0;
}

.architecture-notes span {
  color: var(--green-deep);
  font-family: var(--font-geist-mono), monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
}

.architecture-notes b {
  margin-top: 16px;
  display: block;
  font-size: 15px;
}

.architecture-notes p {
  margin: 9px 0 0;
  color: #667770;
  font-size: 11px;
  line-height: 1.7;
}

.finale {
  padding: 100px 0;
  color: #eef9f5;
  background:
    radial-gradient(circle at 80% 50%, rgba(88, 242, 199, 0.1), transparent 24%),
    var(--deep);
}

.finale-inner {
  display: grid;
  grid-template-columns: 110px 1fr 330px;
  gap: 45px;
  align-items: center;
}

.success-badge {
  width: 100px;
  height: 100px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(88, 242, 199, 0.3);
  border-radius: 50%;
  box-shadow:
    0 0 0 13px rgba(88, 242, 199, 0.04),
    0 0 0 26px rgba(88, 242, 199, 0.018);
}

.success-badge span {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #062019;
  background: var(--green);
  font-size: 26px;
  box-shadow: 0 0 32px rgba(88, 242, 199, 0.33);
  animation: success-pulse 2.5s ease infinite;
}

@keyframes success-pulse {
  50% {
    transform: scale(1.08);
  }
}

.finale h2 {
  max-width: 690px;
  font-size: clamp(34px, 4vw, 58px);
}

.finale p {
  max-width: 670px;
  margin: 21px 0 0;
  color: #839a92;
  font-size: 13px;
  line-height: 1.8;
}

.ticket {
  min-height: 205px;
  padding: 28px;
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  color: var(--ink);
  background: var(--green);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.22);
  transform: rotate(2deg);
}

.ticket::before,
.ticket::after {
  content: "";
  width: 20px;
  height: 20px;
  position: absolute;
  top: 137px;
  border-radius: 50%;
  background: var(--deep);
}

.ticket::before {
  left: -10px;
}

.ticket::after {
  right: -10px;
}

.ticket span {
  font-size: 11px;
}

.ticket b {
  margin-top: 20px;
  font-size: 23px;
}

.ticket small {
  margin-top: 7px;
  color: #245a49;
}

.ticket i {
  margin: 25px -28px 18px;
  border-top: 1px dashed rgba(7, 17, 15, 0.35);
}

.ticket code {
  font-family: var(--font-geist-mono), monospace;
  font-size: 8px;
  letter-spacing: 0.11em;
}

footer {
  padding: 70px 0 30px;
  color: #a5b8b1;
  background: #030907;
}

.footer-grid {
  padding-bottom: 55px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 1.2fr;
  gap: 80px;
}

.footer-brand {
  display: flex;
  gap: 14px;
}

.footer-brand b {
  color: #edf7f4;
  font-size: 16px;
  letter-spacing: 0.09em;
}

.footer-brand span,
.footer-grid p {
  margin-top: 9px;
  color: #596f67;
  font-size: 10px;
  line-height: 1.7;
}

.footer-grid > div > b {
  display: block;
  margin-bottom: 17px;
  color: #edf7f4;
  font-size: 11px;
}

.footer-grid a {
  margin-top: 11px;
  display: block;
  color: #71877f;
  font-size: 10px;
}

.footer-grid a:hover {
  color: var(--green);
}

.footer-grid p {
  margin: 0;
}

.footer-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: #3f554d;
  font-family: var(--font-geist-mono), monospace;
  font-size: 8px;
  letter-spacing: 0.13em;
}

@media (max-width: 1050px) {
  .sim-body {
    grid-template-columns: 205px 1fr;
  }

  .event-console {
    min-height: 310px;
    grid-column: 1 / -1;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .console-lines {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 25px;
  }

  .architecture-row {
    grid-template-columns: 45px minmax(190px, 0.9fr) 1.4fr 60px;
  }

  .finale-inner {
    grid-template-columns: 90px 1fr;
  }

  .ticket {
    grid-column: 2;
    max-width: 370px;
  }
}

@media (max-width: 760px) {
  .shell {
    width: min(100% - 34px, 680px);
  }

  .hero {
    min-height: 800px;
  }

  .nav {
    height: 78px;
  }

  .nav-links,
  .source-button {
    display: none;
  }

  .hero-content {
    padding-top: 94px;
  }

  .hero h1 {
    font-size: clamp(43px, 14vw, 72px);
  }

  .hero-lede {
    font-size: 15px;
  }

  .hero-actions {
    flex-wrap: wrap;
  }

  .primary-action {
    width: 100%;
  }

  .hero-stat {
    min-width: 0;
    flex: 1;
  }

  .signal-deck {
    height: 96px;
  }

  .train-line {
    width: 100%;
  }

  .pulse-readout {
    display: none;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .journey-section,
  .math-section,
  .architecture-section {
    padding: 82px 0;
  }

  .sim-topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 15px;
  }

  .sim-body {
    grid-template-columns: 1fr;
  }

  .stage-rail {
    padding: 13px;
    display: flex;
    gap: 5px;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .rail-progress,
  .stage-button > span:last-child {
    display: none;
  }

  .stage-button {
    width: 38px;
    min-width: 38px;
    min-height: 38px;
    padding: 3px;
  }

  .stage-button.active::before {
    inset: auto 3px -3px;
    height: 2px;
    border: 0;
    background: var(--green);
  }

  .stage-number {
    width: 31px;
    height: 31px;
  }

  .stage-visual {
    padding: 25px 20px 28px;
  }

  .event-orbit {
    margin-top: 24px;
  }

  .console-lines {
    grid-template-columns: 1fr;
  }

  .event-console {
    grid-column: auto;
  }

  .formula-stage {
    grid-template-columns: 1fr;
  }

  .formula-tabs {
    flex-direction: row;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .formula-tabs button {
    min-width: 145px;
    min-height: 60px;
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }

  .formula-tabs button.active::after {
    width: auto;
    height: 2px;
    inset: auto 0 -1px;
  }

  .formula-panel {
    min-height: 510px;
    padding: 35px 20px;
  }

  .big-formula {
    margin: 45px 0 38px;
    gap: 12px;
  }

  .bit-demo {
    grid-template-columns: 1fr;
  }

  .bit-demo .bit-result {
    grid-column: auto;
    flex-wrap: wrap;
    gap: 12px;
  }

  .queue-demo > div {
    grid-template-columns: 50px 1fr;
    gap: 10px;
  }

  .queue-demo span {
    grid-column: 2;
  }

  .race-demo {
    grid-template-columns: 1fr;
  }

  .principle-grid,
  .architecture-notes {
    grid-template-columns: 1fr;
  }

  .principle-grid article,
  .architecture-notes > div {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .architecture-map {
    padding: 18px;
  }

  .architecture-row {
    min-height: 102px;
    padding: 12px;
    grid-template-columns: 35px 1fr;
    gap: 9px;
  }

  .layer-nodes {
    grid-column: 2;
  }

  .architecture-row code,
  .architecture-spine,
  .packet {
    display: none;
  }

  .finale {
    padding: 82px 0;
  }

  .finale-inner {
    grid-template-columns: 1fr;
  }

  .ticket {
    grid-column: auto;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .footer-bottom {
    gap: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}