:root {
  --paper: #f2efe7;
  --paper-deep: #e5dfd2;
  --ink: #11110f;
  --white: #fffdf7;
  --orange: #ff6b35;
  --pink: #ffb5d5;
  --lime: #d9ff6f;
  --blue: #91c8ff;
  --yellow: #ffe76a;
  --border: 2px solid var(--ink);
  --shadow: 7px 7px 0 var(--ink);
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(17, 17, 15, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 17, 15, 0.055) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
}

button,
a {
  color: inherit;
}

a {
  text-decoration: none;
}

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 9px 14px;
  border: var(--border);
  background: var(--yellow);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  padding: 0 4vw;
  border-bottom: var(--border);
  background: rgba(242, 239, 231, 0.94);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 23px;
  font-weight: 900;
  letter-spacing: -0.06em;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: var(--border);
  border-radius: 9px 4px 10px 4px;
  background: var(--orange);
  box-shadow: 3px 3px 0 var(--ink);
  font-family: var(--mono);
  font-size: 20px;
  letter-spacing: 0;
}

nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
}

nav a {
  border-bottom: 2px solid transparent;
}

nav a:hover,
nav a:focus-visible {
  border-bottom-color: var(--ink);
}

.nav-github {
  padding: 9px 13px;
  border: var(--border);
  background: var(--ink);
  color: var(--white);
}

.nav-language {
  padding: 5px 8px;
  border: 1px solid var(--ink);
  background: var(--white);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(420px, 0.97fr);
  gap: clamp(40px, 6vw, 96px);
  align-items: center;
  min-height: calc(100vh - 70px);
  padding: clamp(70px, 9vw, 135px) 5vw;
  overflow: hidden;
}

.hero-copy {
  max-width: 810px;
}

.eyebrow,
.kicker,
.feature-index {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 11px;
  border: var(--border);
  background: var(--lime);
  box-shadow: 3px 3px 0 var(--ink);
}

.pulse {
  width: 9px;
  height: 9px;
  border: 1px solid var(--ink);
  border-radius: 50%;
  background: var(--orange);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  50% {
    box-shadow: 0 0 0 5px rgba(255, 107, 53, 0.22);
  }
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 950px;
  margin: 30px 0 28px;
  font-size: clamp(64px, 7.5vw, 126px);
  font-weight: 950;
  letter-spacing: -0.085em;
  line-height: 0.87;
}

h1 span {
  position: relative;
  display: inline-block;
  z-index: 0;
}

h1 span::after {
  position: absolute;
  z-index: -1;
  right: -0.04em;
  bottom: 0.04em;
  left: -0.03em;
  height: 0.25em;
  border: 2px solid var(--ink);
  background: var(--pink);
  content: "";
  transform: rotate(-1deg);
}

.hero-lead {
  max-width: 710px;
  margin-bottom: 32px;
  font-size: clamp(18px, 1.5vw, 23px);
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: var(--border);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 800;
  transition:
    transform 150ms ease,
    box-shadow 150ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translate(-2px, -2px);
}

.button-primary {
  background: var(--orange);
  box-shadow: 5px 5px 0 var(--ink);
}

.button-primary:hover,
.button-primary:focus-visible {
  box-shadow: 7px 7px 0 var(--ink);
}

.button-secondary {
  background: var(--white);
}

.hero-terminal {
  position: relative;
  min-width: 0;
  border: var(--border);
  background: #171714;
  color: #f9f5e9;
  box-shadow: 14px 14px 0 var(--orange);
  transform: rotate(1.2deg);
}

.hero-terminal::before {
  position: absolute;
  z-index: -1;
  top: -26px;
  right: -24px;
  width: 130px;
  height: 90px;
  border: var(--border);
  background: var(--blue);
  content: "";
  transform: rotate(8deg);
}

.terminal-bar {
  display: flex;
  align-items: center;
  min-height: 50px;
  border-bottom: 1px solid #4a4943;
}

.window-dots {
  display: flex;
  gap: 6px;
  padding: 0 15px;
}

.window-dots span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #56564f;
}

.window-dots span:first-child {
  background: var(--orange);
}

.tabs {
  display: flex;
  align-self: stretch;
}

.tab,
.copy-button {
  border: 0;
  background: transparent;
  color: #929188;
  font-family: var(--mono);
  font-size: 12px;
  cursor: pointer;
}

.tab {
  padding: 0 14px;
  border-right: 1px solid #3c3b36;
}

.tab.is-active {
  background: #22221f;
  color: var(--white);
}

.copy-button {
  margin-left: auto;
  padding: 0 15px;
}

.copy-button:hover,
.copy-button:focus-visible {
  color: var(--lime);
}

.code-panel {
  display: none;
  min-height: 320px;
  margin: 0;
  padding: clamp(25px, 4vw, 42px);
  overflow-x: auto;
  font-family: var(--mono);
  font-size: clamp(13px, 1.2vw, 16px);
  line-height: 1.8;
  tab-size: 2;
}

.code-panel.is-active {
  display: block;
}

.code-muted {
  color: #ff8e69;
}

.code-string {
  color: var(--lime);
}

.code-number {
  color: var(--blue);
}

.code-comment {
  color: #77766f;
}

.code-fn {
  color: var(--pink);
}

.terminal-output {
  display: flex;
  gap: 9px;
  padding: 15px 22px;
  border-top: 1px solid #4a4943;
  font-family: var(--mono);
  font-size: 13px;
}

.prompt {
  color: var(--orange);
}

.terminal-output .result {
  margin-left: auto;
  color: var(--lime);
  font-weight: 800;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: var(--border);
  border-bottom: var(--border);
  background: var(--ink);
  color: var(--white);
}

.signal-strip div {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 24px 3vw;
  border-right: 1px solid #454540;
}

.signal-strip div:last-child {
  border-right: 0;
}

.signal-strip strong {
  color: var(--lime);
  font-family: var(--mono);
  font-size: 21px;
}

.signal-strip span {
  font-family: var(--mono);
  font-size: 12px;
}

.section {
  padding: clamp(90px, 11vw, 170px) 5vw;
}

.section-heading {
  display: grid;
  grid-template-columns: 1.45fr 0.55fr;
  gap: 45px;
  align-items: end;
  margin-bottom: 70px;
}

.section-heading .kicker {
  grid-column: 1 / -1;
  margin-bottom: -25px;
}

.kicker {
  color: #69675f;
}

.section h2,
.architecture-section h2,
.status-section h2,
.quick-start h2 {
  margin-bottom: 0;
  font-size: clamp(42px, 5.6vw, 86px);
  font-weight: 950;
  letter-spacing: -0.07em;
  line-height: 0.96;
}

.section-heading > p:last-child,
.architecture-copy > p,
.quick-start-copy > p:last-child {
  margin-bottom: 4px;
  font-size: 18px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: var(--border);
  border-left: var(--border);
}

.feature {
  min-height: 350px;
  padding: clamp(28px, 4vw, 52px);
  border-right: var(--border);
  border-bottom: var(--border);
}

.feature h3 {
  max-width: 560px;
  margin: 48px 0 18px;
  font-size: clamp(29px, 3vw, 45px);
  letter-spacing: -0.055em;
  line-height: 1;
}

.feature p {
  max-width: 590px;
  font-size: 17px;
}

.feature code {
  display: inline-block;
  margin-top: 14px;
  padding: 7px 9px;
  border: 1px solid var(--ink);
  background: rgba(255, 255, 255, 0.5);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
}

.feature-orange {
  background: var(--orange);
}

.feature-pink {
  background: var(--pink);
}

.feature-lime {
  background: var(--lime);
}

.feature-blue {
  background: var(--blue);
}

.architecture-section {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: clamp(50px, 8vw, 130px);
  padding: clamp(90px, 10vw, 155px) 5vw;
  border-top: var(--border);
  border-bottom: var(--border);
  background: var(--white);
}

.architecture-copy h2 {
  margin: 15px 0 30px;
}

.check-list {
  margin: 35px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding: 13px 0;
  border-top: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
}

.check-list li::before {
  margin-right: 10px;
  color: #d94a20;
  content: "✓";
}

.architecture-map {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 90px 1fr 90px 1fr;
  align-items: center;
  min-height: 480px;
  padding: 50px;
  border: var(--border);
  background:
    radial-gradient(circle at 1px 1px, rgba(17, 17, 15, 0.2) 1px, transparent 0)
      0 0 / 18px 18px,
    var(--paper);
  box-shadow: var(--shadow);
}

.arch-node {
  position: relative;
  z-index: 2;
  display: flex;
  min-height: 155px;
  flex-direction: column;
  justify-content: space-between;
  padding: 18px;
  border: var(--border);
  box-shadow: 5px 5px 0 var(--ink);
}

.arch-node span {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
}

.arch-node strong {
  font-size: 23px;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.arch-js {
  background: var(--orange);
}

.arch-rust {
  background: var(--lime);
  transform: translateY(-45px);
}

.arch-py {
  background: var(--blue);
}

.arch-link {
  position: relative;
  z-index: 2;
  text-align: center;
}

.arch-link span {
  display: block;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 9px;
}

.arch-link i {
  font-family: var(--mono);
  font-size: 30px;
  font-style: normal;
}

.thread-line {
  position: absolute;
  right: 50px;
  bottom: 50px;
  left: 50px;
  height: 38px;
  border: 2px dashed var(--ink);
  background: var(--pink);
  text-align: center;
}

.thread-line span {
  position: relative;
  top: 6px;
  padding: 3px 7px;
  background: var(--pink);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.status-section {
  padding: clamp(90px, 10vw, 150px) 5vw;
  background: var(--ink);
  color: var(--white);
}

.status-card {
  display: grid;
  grid-template-columns: 1fr 0.7fr;
  gap: 70px;
  align-items: end;
  margin-bottom: 70px;
}

.status-card .kicker {
  color: var(--lime);
}

.status-card p:last-child {
  margin-bottom: 5px;
  color: #c8c5b9;
  font-size: 18px;
}

.status-table {
  border-top: 1px solid #55544d;
}

.status-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 25px;
  align-items: center;
  padding: 21px 0;
  border-bottom: 1px solid #55544d;
  font-family: var(--mono);
  font-size: 13px;
}

.status-row strong {
  padding: 5px 9px;
  border: 1px solid currentColor;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-done {
  color: var(--lime);
}

.status-progress {
  color: var(--yellow);
}

.status-planned {
  color: var(--pink);
}

.quick-start {
  padding: clamp(90px, 10vw, 150px) 5vw;
  background: var(--orange);
}

.quick-start-copy {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 40px;
  align-items: end;
  margin-bottom: 50px;
}

.quick-start-copy .kicker {
  grid-column: 1 / -1;
  margin-bottom: -18px;
  color: var(--ink);
}

.install-command {
  position: relative;
  border: var(--border);
  background: var(--ink);
  box-shadow: 8px 8px 0 var(--white);
  color: var(--white);
}

.install-command pre {
  margin: 0;
  padding: 28px 145px 28px 28px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.9;
}

.copy-install {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 8px 11px;
  border: 1px solid #77766f;
  background: transparent;
  color: var(--white);
  font-family: var(--mono);
  font-size: 11px;
  cursor: pointer;
}

.copy-install:hover,
.copy-install:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
}

.quick-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 55px;
  border-top: var(--border);
  border-left: var(--border);
}

.quick-links a {
  display: flex;
  justify-content: space-between;
  padding: 22px;
  border-right: var(--border);
  border-bottom: var(--border);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 800;
}

.quick-links a:hover,
.quick-links a:focus-visible {
  background: var(--white);
}

footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 35px;
  align-items: center;
  padding: 35px 5vw;
  border-top: var(--border);
  background: var(--paper);
  font-family: var(--mono);
  font-size: 11px;
}

footer p {
  margin: 0;
}

.footer-brand {
  font-family: var(--sans);
}

html[lang="zh-CN"] h1 {
  font-size: clamp(58px, 6.7vw, 112px);
  letter-spacing: -0.065em;
  line-height: 0.96;
}

html[lang="zh-CN"] .section h2,
html[lang="zh-CN"] .architecture-section h2,
html[lang="zh-CN"] .status-section h2,
html[lang="zh-CN"] .quick-start h2 {
  letter-spacing: -0.055em;
  line-height: 1.08;
}

@media (max-width: 1100px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    max-width: 900px;
  }

  .hero-terminal {
    width: min(850px, 100%);
    margin: 0 auto;
  }

  .architecture-section {
    grid-template-columns: 1fr;
  }

  .architecture-copy {
    max-width: 760px;
  }
}

@media (max-width: 800px) {
  .site-header {
    padding: 0 20px;
  }

  nav {
    gap: 12px;
  }

  nav a:not(.nav-github):not(.nav-language) {
    display: none;
  }

  .hero,
  .section,
  .architecture-section,
  .status-section,
  .quick-start {
    padding-right: 22px;
    padding-left: 22px;
  }

  .signal-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .signal-strip div:nth-child(2) {
    border-right: 0;
  }

  .signal-strip div:nth-child(-n + 2) {
    border-bottom: 1px solid #454540;
  }

  .section-heading,
  .status-card,
  .quick-start-copy {
    grid-template-columns: 1fr;
  }

  .section-heading .kicker,
  .quick-start-copy .kicker {
    margin-bottom: -10px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .architecture-map {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 36px 28px 90px;
  }

  .arch-node {
    min-height: 120px;
  }

  .arch-rust {
    transform: none;
  }

  .arch-link {
    height: 25px;
  }

  .arch-link span {
    display: inline;
  }

  .arch-link i {
    display: inline-block;
    margin-left: 10px;
    transform: rotate(90deg);
  }

  .thread-line {
    right: 28px;
    bottom: 28px;
    left: 28px;
  }

  .quick-links {
    grid-template-columns: 1fr;
  }

  footer {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  h1 {
    font-size: clamp(54px, 18vw, 76px);
  }

  .hero {
    padding-top: 65px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .button {
    width: 100%;
  }

  .hero-terminal {
    box-shadow: 8px 8px 0 var(--orange);
    transform: none;
  }

  .window-dots {
    display: none;
  }

  .code-panel {
    min-height: 280px;
    padding: 22px 17px;
    font-size: 12px;
  }

  .signal-strip {
    grid-template-columns: 1fr;
  }

  .signal-strip div {
    border-right: 0;
    border-bottom: 1px solid #454540;
  }

  .status-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .status-row strong {
    justify-self: start;
  }

  .install-command pre {
    padding: 65px 18px 22px;
    font-size: 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .pulse {
    animation: none;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}