:root {
  --bg: #07111f;
  --bg-soft: rgba(11, 22, 38, 0.88);
  --panel: rgba(10, 20, 35, 0.72);
  --panel-strong: rgba(12, 24, 40, 0.92);
  --line: rgba(116, 175, 199, 0.18);
  --line-strong: rgba(143, 220, 232, 0.34);
  --text: #edf8fb;
  --muted: #98b6c5;
  --accent: #73f0dd;
  --accent-strong: #befc7d;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --heading-font: "Microsoft YaHei UI", "Noto Sans SC", sans-serif;
  --body-font: "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--body-font);
  background:
    radial-gradient(circle at top left, rgba(45, 109, 162, 0.22), transparent 30%),
    radial-gradient(circle at 80% 10%, rgba(115, 240, 221, 0.16), transparent 28%),
    radial-gradient(circle at bottom right, rgba(190, 252, 125, 0.12), transparent 24%),
    linear-gradient(180deg, #07111f 0%, #040914 55%, #07101d 100%);
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

body::before {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at center, black 35%, transparent 88%);
}

body::after {
  opacity: 0.18;
  background:
    radial-gradient(circle at 20% 20%, rgba(115, 240, 221, 0.4), transparent 12%),
    radial-gradient(circle at 75% 25%, rgba(190, 252, 125, 0.25), transparent 10%),
    radial-gradient(circle at 50% 80%, rgba(115, 167, 240, 0.18), transparent 14%);
  filter: blur(50px);
}

a,
button,
input {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.page-shell {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 32px 16px 72px;
}

.hero,
.lab-section,
.rules-section,
.presets-section {
  position: relative;
}

.hero-copy,
.hero-visual,
.canvas-panel,
.control-panel,
.rule-card,
.preset-card {
  min-width: 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 32px;
  align-items: center;
  min-height: min(92vh, 860px);
  padding: 32px 0 56px;
}

.hero-copy h1,
.section-heading h2,
.canvas-toolbar h3,
.rule-card h3,
.preset-card h3 {
  margin: 0;
  font-family: var(--heading-font);
  letter-spacing: -0.04em;
}

.hero-copy h1 {
  max-width: 11ch;
  font-size: clamp(3rem, 8vw, 6.8rem);
  line-height: 0.95;
  text-wrap: balance;
  word-break: break-word;
}

.eyebrow,
.label {
  margin: 0;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.72rem;
}

.hero-intro,
.section-heading p,
.support-copy,
.info-list,
.rule-card p,
.preset-card p {
  color: var(--muted);
}

.hero-intro {
  max-width: 36rem;
  margin: 24px 0 0;
  font-size: 1.06rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.primary-link,
.secondary-link,
.button-grid button {
  border-radius: 999px;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, background 180ms ease;
}

.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  text-decoration: none;
}

.primary-link {
  color: #05232a;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  box-shadow: 0 18px 38px rgba(115, 240, 221, 0.25);
}

.secondary-link {
  color: var(--text);
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.hero-pills li {
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  backdrop-filter: blur(12px);
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 560px;
}

.signal-board {
  position: relative;
  width: min(100%, 520px);
  aspect-ratio: 1;
  border-radius: 36px;
  background:
    linear-gradient(180deg, rgba(9, 18, 31, 0.9), rgba(10, 21, 33, 0.72)),
    radial-gradient(circle at center, rgba(115, 240, 221, 0.15), transparent 58%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.signal-board::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(115, 240, 221, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(115, 240, 221, 0.06) 1px, transparent 1px);
  background-size: 10% 10%;
}

.signal-layer {
  position: absolute;
  inset: 14%;
  border-radius: 28px;
  border: 1px solid rgba(190, 252, 125, 0.18);
}

.layer-a {
  animation: drift 14s linear infinite;
}

.layer-b {
  inset: 22%;
  border-color: rgba(115, 240, 221, 0.24);
  animation: driftReverse 18s linear infinite;
}

.signal-core {
  position: absolute;
  inset: 50%;
  width: 40%;
  height: 40%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  transform: translate(-50%, -50%);
}

.signal-dot {
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.signal-dot.live {
  background: linear-gradient(135deg, rgba(115, 240, 221, 0.94), rgba(190, 252, 125, 0.94));
  box-shadow:
    0 0 28px rgba(115, 240, 221, 0.42),
    inset 0 0 18px rgba(255, 255, 255, 0.22);
  animation: pulseDot 3.6s ease-in-out infinite;
}

.signal-dot.accent {
  animation-delay: 0.8s;
}

.hero-metrics {
  position: absolute;
  right: 0;
  bottom: 24px;
  width: min(300px, 85%);
}

.card-surface {
  padding: 22px;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    linear-gradient(180deg, rgba(14, 24, 38, 0.82), rgba(8, 16, 29, 0.78)),
    rgba(255, 255, 255, 0.02);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.metric-row,
.panel-row,
.canvas-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.metric-row + .metric-row {
  margin-top: 16px;
}

.metric-row strong,
.mini-stat strong,
.panel-row strong {
  font-family: var(--heading-font);
  font-size: 1.25rem;
}

.lab-section,
.rules-section,
.presets-section {
  padding-top: 48px;
}

.section-heading {
  max-width: 52rem;
  margin-bottom: 28px;
}

.section-heading h2 {
  font-size: clamp(2.1rem, 4vw, 3.6rem);
  line-height: 0.98;
  margin-top: 10px;
}

.section-heading p {
  margin: 14px 0 0;
  line-height: 1.75;
}

.lab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  gap: 22px;
}

.canvas-panel,
.control-panel {
  min-height: 100%;
}

.canvas-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.canvas-toolbar h3 {
  margin-top: 6px;
  font-size: 1.8rem;
}

.status-cluster {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.status-pill,
.speed-pill,
.preset-tag {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-pill {
  color: var(--bg);
  background: linear-gradient(135deg, var(--accent) 0%, rgba(115, 240, 221, 0.72) 100%);
}

.status-pill.running {
  background: linear-gradient(135deg, var(--accent-strong) 0%, var(--accent) 100%);
}

.speed-pill,
.preset-tag {
  border: 1px solid var(--line-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.canvas-shell {
  position: relative;
  margin-top: 22px;
  padding: 18px;
  border-radius: 26px;
  background:
    linear-gradient(180deg, rgba(6, 13, 24, 0.94), rgba(5, 11, 19, 0.9)),
    rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

#life-canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 18px;
  background:
    radial-gradient(circle at top left, rgba(115, 240, 221, 0.08), transparent 24%),
    linear-gradient(180deg, rgba(6, 16, 27, 0.98), rgba(5, 12, 22, 0.98));
  cursor: crosshair;
}

.canvas-caption {
  display: flex;
  justify-content: space-between;
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.94rem;
}

.canvas-footer {
  gap: 16px;
  margin-top: 18px;
}

.mini-stat {
  flex: 1 1 0;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.mini-stat .label {
  display: block;
  margin-bottom: 10px;
}

.panel-block + .panel-block {
  margin-top: 22px;
}

.button-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.button-grid button,
.preset-card {
  color: var(--text);
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.04);
}

.button-grid button:hover,
.button-grid button:focus-visible,
.primary-link:hover,
.secondary-link:hover,
.preset-card:hover,
.preset-card:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.16);
}

.button-grid .primary-button {
  grid-column: span 2;
  color: #04131e;
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
}

.button-grid button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
  box-shadow: none;
}

#speed-slider {
  width: 100%;
  margin-top: 12px;
  accent-color: var(--accent);
}

.support-copy {
  margin: 12px 0 0;
  line-height: 1.65;
}

.info-list {
  margin: 14px 0 0;
  padding-left: 18px;
  line-height: 1.75;
}

.rules-grid,
.preset-grid {
  display: grid;
  gap: 18px;
}

.rules-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.rule-card {
  min-height: 220px;
}

.rule-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  font-family: var(--heading-font);
  color: var(--bg);
  background: linear-gradient(135deg, rgba(115, 240, 221, 0.94), rgba(190, 252, 125, 0.88));
}

.rule-card h3,
.preset-card h3 {
  margin-top: 20px;
  font-size: 1.5rem;
}

.rule-card p,
.preset-card p {
  margin: 12px 0 0;
  line-height: 1.75;
}

.preset-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.preset-card {
  text-align: left;
  border-radius: var(--radius-lg);
}

.preset-card.active {
  border-color: rgba(115, 240, 221, 0.72);
  background:
    linear-gradient(180deg, rgba(14, 26, 39, 0.94), rgba(8, 17, 29, 0.84)),
    rgba(255, 255, 255, 0.04);
  box-shadow: 0 0 0 1px rgba(115, 240, 221, 0.24), var(--shadow);
}

@keyframes pulseDot {
  0%,
  100% {
    transform: scale(0.94);
    opacity: 0.72;
  }
  50% {
    transform: scale(1.04);
    opacity: 1;
  }
}

@keyframes drift {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes driftReverse {
  from {
    transform: rotate(0deg) scale(1.02);
  }
  to {
    transform: rotate(-360deg) scale(1.02);
  }
}

@media (max-width: 980px) {
  .hero,
  .lab-layout,
  .rules-grid,
  .preset-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 20px;
  }

  .hero-copy h1 {
    max-width: none;
  }

  .hero-visual {
    min-height: 420px;
  }

  .hero-metrics {
    position: static;
    width: 100%;
    margin-top: 18px;
  }
}

@media (max-width: 720px) {
  .page-shell {
    padding: 18px 10px 56px;
  }

  .canvas-footer,
  .button-grid {
    grid-template-columns: 1fr;
  }

  .canvas-footer {
    flex-direction: column;
  }

  .button-grid .primary-button {
    grid-column: auto;
  }

  .hero-actions,
  .status-cluster {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-copy h1 {
    max-width: 9ch;
    font-size: clamp(2.2rem, 11vw, 3rem);
    line-height: 0.98;
  }

  .primary-link,
  .secondary-link {
    width: 100%;
  }

  .preset-grid {
    display: flex;
    overflow-x: auto;
    padding-bottom: 6px;
    scroll-snap-type: x proximity;
  }

  .preset-card {
    min-width: min(300px, 84vw);
    scroll-snap-align: start;
  }
}