:root {
  --bg: #06080b;
  --bg-elevated: #0c1016;
  --text: #e6e9ef;
  --muted: #8a93a3;
  --faint: #4a5363;
  --line: rgba(230, 233, 239, 0.08);
  --accent: #3dffa8;
  --accent-dim: rgba(61, 255, 168, 0.14);
  --accent-soft: #7ee7c7;
  --cyan: #5ad4ff;
  --font: "Outfit", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 72rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-weight: 400;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.mono {
  font-family: var(--mono);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' 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");
}

.grid-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(90, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(90, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 20%, black 20%, transparent 75%);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem clamp(1.25rem, 4vw, 2.5rem);
  background: linear-gradient(to bottom, rgba(6, 8, 11, 0.92), transparent);
  backdrop-filter: blur(8px);
}

.logo {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav a {
  font-size: 0.8125rem;
  color: var(--muted);
  transition: color 0.25s var(--ease);
}

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

.hero {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 7rem clamp(1.25rem, 4vw, 2.5rem) 4rem;
  max-width: var(--max);
  margin: 0 auto;
}

.hero-glow {
  position: absolute;
  top: 18%;
  left: 50%;
  translate: -50% 0;
  width: min(56rem, 120vw);
  height: 28rem;
  background:
    radial-gradient(ellipse at 40% 50%, rgba(61, 255, 168, 0.12), transparent 55%),
    radial-gradient(ellipse at 70% 40%, rgba(90, 212, 255, 0.1), transparent 50%);
  filter: blur(20px);
  pointer-events: none;
  animation: pulse-glow 8s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.04); }
}

.hero-kicker {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 1.5rem;
  font-size: 0.75rem;
  color: var(--accent-soft);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.1s forwards;
}

.cursor-blink {
  display: inline-block;
  width: 0.45rem;
  height: 0.9em;
  background: var(--accent);
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero-brand {
  position: relative;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.25s forwards;
}

.brand-cn {
  font-size: clamp(2.6rem, 8vw, 5.5rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.15;
  padding-bottom: 0.08em;
  background: linear-gradient(135deg, #fff 0%, #c8d0dc 45%, var(--accent-soft) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-en {
  font-size: clamp(0.95rem, 2.2vw, 1.15rem);
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0.18em;
  text-transform: lowercase;
}

.hero-lead {
  position: relative;
  max-width: 34rem;
  margin: 1.75rem 0 0;
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  font-weight: 300;
  color: var(--muted);
  line-height: 1.7;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.4s forwards;
}

.hero-cta {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.25rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.55s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  font-family: var(--font);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 2px;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #04120c;
}

.btn-primary:hover {
  background: #6dffc0;
}

.btn-ghost {
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}

.btn-ghost:hover {
  border-color: rgba(61, 255, 168, 0.35);
  background: var(--accent-dim);
}

.hero-meta {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-top: 3.5rem;
  font-size: 0.75rem;
  color: var(--faint);
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.7s forwards;
}

.hero-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--faint);
}

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

.section {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 6rem clamp(1.25rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
}

.section-head {
  margin-bottom: 1.75rem;
}

.eyebrow {
  margin: 0 0 0.85rem;
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.section h2 {
  margin: 0;
  max-width: 28rem;
  font-size: clamp(1.65rem, 3.5vw, 2.35rem);
  font-weight: 550;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.section-lead {
  max-width: 40rem;
  margin: 0 0 2.5rem;
  color: var(--muted);
  font-weight: 300;
}

.focus-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.focus-list li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1.5rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}

.focus-key {
  font-size: 0.8125rem;
  color: var(--cyan);
}

.focus-val {
  color: var(--muted);
  font-weight: 300;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2rem;
}

.timeline li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1.5rem;
  align-items: start;
}

.timeline time {
  font-size: 0.8125rem;
  color: var(--faint);
  padding-top: 0.35rem;
}

.timeline h3 {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
  font-weight: 550;
}

.timeline p {
  margin: 0;
  color: var(--muted);
  font-weight: 300;
}

.build-feature {
  padding: 2rem 0 2.5rem;
  border-bottom: 1px solid var(--line);
}

.build-tag {
  margin: 0 0 0.75rem;
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.build-feature h3 {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
}

.build-feature > p {
  max-width: 42rem;
  margin: 0;
  color: var(--muted);
  font-weight: 300;
}

.build-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  font-size: 0.8125rem;
  color: var(--faint);
}

.build-stats strong {
  color: var(--accent-soft);
  font-weight: 500;
  margin-right: 0.35rem;
}

.build-more {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  padding-top: 2.5rem;
}

.build-more h3 {
  margin: 0 0 0.55rem;
  font-size: 1.15rem;
  font-weight: 550;
}

.build-more p {
  margin: 0;
  color: var(--muted);
  font-weight: 300;
}

.contact .section-lead {
  margin-bottom: 1.75rem;
}

/* ===== Prompt Terminal ===== */
.prompt-section {
  border-top: none;
  padding: 2rem clamp(1.25rem, 4vw, 2.5rem) 4rem;
}

.prompt-box {
  max-width: 48rem;
  margin: 0 auto;
  border: 1px solid rgba(61, 255, 168, 0.16);
  border-radius: 8px;
  background: #070a0f;
  box-shadow: 0 0 40px rgba(61, 255, 168, 0.04), inset 0 1px 0 rgba(255, 255, 255, 0.02);
  overflow: hidden;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.prompt-box.is-in {
  opacity: 1;
  transform: translateY(0);
}

.prompt-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.prompt-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.prompt-dot.red { background: #ff5f56; }
.prompt-dot.yellow { background: #ffbd2e; }
.prompt-dot.green { background: #27c93f; }

.prompt-title {
  margin-left: 0.35rem;
  font-size: 0.7rem;
  color: var(--faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.prompt-body {
  padding: 1.5rem 1.25rem;
  font-size: 0.8rem;
  line-height: 1.85;
  color: var(--accent-soft);
  min-height: 22rem;
}

.prompt-lines {
  display: inline;
}

.prompt-lines .line {
  display: block;
  min-height: 1.5em;
  margin-bottom: 0.15em;
}

.prompt-lines .line.dim {
  color: rgba(126, 231, 199, 0.45);
}

.prompt-lines .line.heading {
  color: var(--accent);
  font-weight: 500;
  margin: 0.7em 0 0.25em;
  letter-spacing: 0.04em;
}

.prompt-lines .line.heading:first-child {
  margin-top: 0;
}

.prompt-lines .line.bullet {
  padding-left: 1.2em;
  text-indent: -0.75em;
}

.prompt-lines .line.indent {
  padding-left: 2em;
}

.prompt-lines .line.spacer {
  height: 0.6em;
}

.prompt-cursor {
  display: inline-block;
  color: var(--accent);
  animation: prompt-blink 0.85s steps(1) infinite;
  vertical-align: text-bottom;
}

@keyframes prompt-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.contact-mail {
  display: inline-block;
  font-size: clamp(1.25rem, 3vw, 1.85rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text);
  border-bottom: 1px solid rgba(61, 255, 168, 0.35);
  padding-bottom: 0.15rem;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.contact-mail:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.contact-note {
  margin: 1.25rem 0 0;
  font-size: 0.8125rem;
  color: var(--faint);
}

.site-footer {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem clamp(1.25rem, 4vw, 2.5rem) 2.5rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--faint);
}

.site-footer a:hover {
  color: var(--muted);
}

.section,
.build-feature,
.timeline li,
.focus-list li {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.section.is-in,
.build-feature.is-in,
.timeline li.is-in,
.focus-list li.is-in {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 720px) {
  .nav {
    gap: 1rem;
  }

  .nav a:nth-child(2),
  .nav a:nth-child(3) {
    display: none;
  }

  .focus-list li,
  .timeline li {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .build-more {
    grid-template-columns: 1fr;
  }

  .hero-meta {
    margin-top: 2.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .hero-kicker,
  .hero-brand,
  .hero-lead,
  .hero-cta,
  .hero-meta,
  .section,
  .build-feature,
  .timeline li,
  .focus-list li {
    opacity: 1;
    transform: none;
  }
}