@font-face {
  font-family: "PixelZpix";
  src: url("/assets/fonts/PixelZpix.woff2") format("woff2");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #101018;
  --bg-raise: #191926;
  --ink: #f3efe4;
  --muted: #b7b3c2;
  --faint: #8d8998;
  --amber: #f0a030;
  --amber-dim: #c08020;
  --green: #3dce62;
  --line: #f0a030;
  --shadow: #05050a;
  --grid: rgba(255, 255, 255, 0.035);
  --link: #9cf0ad;
  --card: #1c1c2c;
  --danger: #e07070;
  --space: 8px;
  color-scheme: dark;
}

html[data-theme="day"] {
  --bg: #f4ecdc;
  --bg-raise: #fff8ec;
  --ink: #1b1712;
  --muted: #534c43;
  --faint: #6d655b;
  --amber: #b85a10;
  --amber-dim: #8a3e08;
  --green: #1c7a34;
  --line: #1b1712;
  --shadow: #1b1712;
  --grid: rgba(27, 23, 18, 0.06);
  --link: #0f5c28;
  --card: #fffaf1;
  --danger: #9d2a2a;
  color-scheme: light;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 36% 28% at 78% 18%, color-mix(in srgb, var(--amber) 14%, transparent), transparent 70%),
    radial-gradient(ellipse 28% 24% at 12% 78%, color-mix(in srgb, var(--green) 16%, transparent), transparent 70%),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: auto, auto, 8px 8px, 8px 8px;
  background-attachment: fixed;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  font-size: 17px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 40;
  opacity: 0.18;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 2px,
    rgba(0, 0, 0, 0.08) 2px 3px
  );
  animation: scan 9s linear infinite;
}

html[data-theme="day"] body::before {
  opacity: 0.1;
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) 240px;
  gap: 40px;
  align-items: center;
  padding: 20px 0 8px;
}

.home-hero h1 {
  font-size: clamp(40px, 5vw, 60px);
  line-height: 1.2;
  text-shadow: none;
}

.home-hero .range {
  width: 240px;
  justify-self: end;
}

.board {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(220px, 0.7fr);
  gap: 28px;
  margin-top: 36px;
  align-items: start;
}

.note-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.note,
.side-card {
  padding: 16px 18px;
  border: 2px solid var(--line);
  background: var(--card);
  box-shadow: 4px 4px 0 var(--shadow);
}

.note time {
  color: var(--amber);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.note h3 {
  margin: 4px 0 8px;
  font-size: 22px;
}

.note p,
.side-card p {
  margin: 0;
}

.side-card {
  background: var(--bg-raise);
}

.side-card h2 {
  font-size: 22px;
}

.side-card ul {
  margin: 14px 0 0;
  padding-left: 1.15em;
}

.side-card li {
  margin: 6px 0;
}

.lanes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 40px;
  align-items: start;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.stack .card h2 {
  font-size: 24px;
}

@keyframes scan {
  from { background-position: 0 0; }
  to { background-position: 0 12px; }
}

.pixel {
  font-family: "PixelZpix", "SimHei", "Microsoft YaHei", sans-serif;
  font-weight: normal;
  font-synthesis: none;
  -webkit-font-smoothing: none;
  -moz-osx-font-smoothing: unset;
  letter-spacing: 0.04em;
}

a {
  color: var(--link);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--amber);
}

.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  z-index: 60;
  padding: 8px 12px;
  background: var(--amber);
  color: #1b1712;
  text-decoration: none;
}

.skip:focus {
  top: 12px;
}

.wrap {
  width: min(1140px, calc(100% - 48px));
  margin: 0 auto;
}

main {
  position: relative;
}

main .wrap:not(.stage-wrap) {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

main .wrap:not(.stage-wrap)::before {
  content: "";
  width: 2px;
  min-height: 100%;
  justify-self: center;
  background: repeating-linear-gradient(
    to bottom,
    var(--amber) 0 8px,
    transparent 8px 16px
  );
}

main .wrap:not(.stage-wrap) > * {
  grid-column: 2;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-bottom: 2px solid var(--line);
  backdrop-filter: blur(6px);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  min-height: 44px;
}

.brand:hover {
  color: var(--amber);
}

.mark {
  width: 16px;
  height: 16px;
  background:
    linear-gradient(var(--amber), var(--amber)) 0 0 / 16px 2px no-repeat,
    linear-gradient(var(--amber), var(--amber)) 0 14px / 16px 2px no-repeat,
    linear-gradient(var(--amber), var(--amber)) 0 0 / 2px 16px no-repeat,
    linear-gradient(var(--amber), var(--amber)) 14px 0 / 2px 16px no-repeat,
    linear-gradient(var(--green), var(--green)) 4px 4px / 8px 8px no-repeat,
    linear-gradient(var(--bg), var(--bg)) 6px 6px / 4px 4px no-repeat;
  box-shadow: 3px 3px 0 var(--shadow);
  image-rendering: pixelated;
}

.brand-name {
  font-size: 22px;
  line-height: 1.2;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.nav a,
.theme-btn {
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border: 2px solid transparent;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
}

.nav a[aria-current="page"],
.nav a:hover,
.theme-btn:hover {
  border-color: var(--line);
  box-shadow: 3px 3px 0 var(--shadow);
  color: var(--ink);
  background: var(--bg-raise);
  transform: translate(-1px, -1px);
  transition: transform 0.12s steps(3), box-shadow 0.12s steps(3);
}

.theme-btn {
  border-color: var(--line);
  color: var(--ink);
  background: var(--card);
}

main {
  padding: 28px 0 80px;
}

.kicker {
  margin: 0 0 12px;
  color: var(--amber);
  font-size: 14px;
  letter-spacing: 0.18em;
}

.kicker .caret {
  display: inline-block;
  width: 8px;
  height: 14px;
  margin-left: 4px;
  background: var(--amber);
  vertical-align: -2px;
  animation: blink 1s steps(2) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

h1,
h2,
h3 {
  font-weight: normal;
  line-height: 1.35;
  margin: 0 0 12px;
}

.stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 440px);
  column-gap: 48px;
  align-items: center;
  min-height: 0;
  padding: 12px 0 0;
}

.stage h1 {
  font-size: clamp(48px, 7vw, 80px);
  line-height: 1.12;
  margin-bottom: 16px;
  text-shadow: 4px 4px 0 color-mix(in srgb, var(--amber) 35%, transparent);
}

.lede {
  max-width: 40rem;
  margin: 0 0 20px;
  color: var(--ink);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border: 2px solid var(--line);
  background: var(--amber);
  color: #1b1712;
  text-decoration: none;
  box-shadow: 4px 4px 0 var(--shadow);
  transition: transform 0.12s steps(3), box-shadow 0.12s steps(3);
}

.btn:hover {
  color: #1b1712;
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--shadow);
}

.btn.ghost {
  background: transparent;
  color: var(--ink);
}

.btn.ghost:hover {
  color: var(--ink);
  background: var(--bg-raise);
}

.range {
  position: relative;
  width: 240px;
  aspect-ratio: 1;
  justify-self: end;
}

.range::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--card);
  border: 2px solid var(--line);
  box-shadow: 12px 12px 0 var(--shadow);
}

.rings,
.crosshair,
.arrow-track {
  position: absolute;
  inset: 0;
}

.rings {
  z-index: 1;
}

.rings i,
.rings b {
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.rings i {
  border: 3px solid var(--amber);
}

.rings i:nth-child(1) {
  width: 78%;
  height: 78%;
}

.rings i:nth-child(2) {
  width: 50%;
  height: 50%;
  border-color: var(--green);
}

.rings i:nth-child(3) {
  width: 24%;
  height: 24%;
  border-color: var(--ink);
}

.rings b {
  width: 10px;
  height: 10px;
  background: var(--amber);
  box-shadow: 0 0 0 4px var(--card), 0 0 0 7px var(--green);
}

.crosshair {
  z-index: 2;
  pointer-events: none;
}

.crosshair::before,
.crosshair::after {
  content: "";
  position: absolute;
  background: color-mix(in srgb, var(--ink) 45%, transparent);
}

.crosshair::before {
  left: 11%;
  right: 11%;
  top: 50%;
  height: 2px;
  margin-top: -1px;
}

.crosshair::after {
  top: 11%;
  bottom: 11%;
  left: 50%;
  width: 2px;
  margin-left: -1px;
}

.arrow-track {
  z-index: 3;
  pointer-events: none;
}

.arrow {
  --shaft: 70px;
  --head: 12px;
  position: absolute;
  top: 50%;
  left: calc(50% - var(--shaft) - var(--head));
  width: var(--shaft);
  height: 4px;
  margin-top: -2px;
  background: var(--ink);
  animation: fly 2.8s steps(12) infinite;
}

.arrow::before,
.arrow::after {
  content: "";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.arrow::before {
  right: calc(var(--head) * -1);
  border-left: var(--head) solid var(--amber);
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
}

.arrow::after {
  left: -2px;
  width: 12px;
  height: 14px;
  background:
    linear-gradient(var(--amber), var(--amber)) left top / 12px 3px no-repeat,
    linear-gradient(var(--amber), var(--amber)) left bottom / 12px 3px no-repeat;
}

@keyframes fly {
  0% { left: calc(-1 * (var(--shaft) + 36px)); opacity: 0; }
  14% { opacity: 1; }
  58% { left: calc(50% - var(--shaft) - var(--head)); opacity: 1; }
  86% { left: calc(50% - var(--shaft) - var(--head)); opacity: 1; }
  100% { left: calc(50% - var(--shaft) - var(--head)); opacity: 0; }
}

.chip {
  position: absolute;
  z-index: 5;
  margin: 0;
  width: auto;
  max-width: 8rem;
  padding: 8px 10px;
  background: var(--bg-raise);
  border: 2px solid var(--line);
  box-shadow: 5px 5px 0 var(--shadow);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.chip b {
  display: block;
  margin-bottom: 2px;
  color: var(--amber);
  font-weight: normal;
}

.chip.c1 { top: -10px; left: -6px; }
.chip.c2 { top: 8px; right: -6px; }
.chip.c3 { left: -6px; bottom: 46%; }

.section {
  margin-top: 56px;
}

.section h2 {
  font-size: 28px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--line);
  padding-bottom: 8px;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.doors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.door {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 180px;
  padding: 22px;
  text-decoration: none;
  color: var(--ink);
  background: var(--card);
  border: 2px solid var(--line);
  box-shadow: 6px 6px 0 var(--shadow);
  transition: transform 0.12s steps(3), box-shadow 0.12s steps(3);
}

.door:hover {
  color: var(--ink);
  transform: translate(-3px, -3px);
  box-shadow: 12px 12px 0 var(--shadow);
}

.mosaic {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  grid-template-areas:
    "game echo"
    "game app"
    "pixel app";
  gap: 20px 26px;
  align-items: stretch;
}

.door-game { grid-area: game; box-shadow: 12px 12px 0 var(--green); }
.card-echo { grid-area: echo; margin-top: -128px; position: relative; z-index: 2; }
.card-pixel { grid-area: pixel; margin-right: 14%; border-left-width: 8px; border-left-color: var(--green); }
.door-app { grid-area: app; box-shadow: -10px 12px 0 var(--amber); }

.door-mark,
.pixel-stack {
  margin-top: auto;
}

.door-mark {
  width: 84px;
  height: 84px;
  border: 3px solid var(--amber);
  border-radius: 50%;
  position: relative;
  box-shadow: 6px 6px 0 var(--shadow);
}

.door-mark::before,
.door-mark::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.door-mark::before {
  inset: 16px;
  border: 3px solid var(--green);
}

.door-mark::after {
  inset: 32px;
  background: var(--amber);
}

.pixel-stack {
  width: 78px;
  height: 64px;
  background:
    linear-gradient(var(--green), var(--green)) 0 0 / 28px 28px no-repeat,
    linear-gradient(var(--amber), var(--amber)) 36px 6px / 28px 28px no-repeat,
    linear-gradient(var(--ink), var(--ink)) 14px 36px / 28px 28px no-repeat;
  border: 2px solid var(--line);
  box-shadow: 6px 6px 0 var(--shadow);
}

.door .tag {
  color: var(--amber);
  font-size: 13px;
  letter-spacing: 0.16em;
}

.door strong {
  font-size: 32px;
  font-weight: normal;
}

.door span {
  color: var(--muted);
  max-width: 36rem;
}

.shelf {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.shelf:has(.card) .empty {
  display: none;
}

.shelf .card:only-of-type {
  grid-column: 1 / -1;
}

.empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 28px;
  border: 2px dashed var(--line);
  color: var(--muted);
  background: var(--card);
}

.card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px;
  text-decoration: none;
  color: var(--ink);
  background: var(--card);
  border: 2px solid var(--line);
  box-shadow: 5px 5px 0 var(--shadow);
  transition: transform 0.12s steps(3), box-shadow 0.12s steps(3);
}

.card:hover {
  color: var(--ink);
  transform: translate(-3px, -3px);
  box-shadow: 8px 8px 0 var(--shadow);
}

.tag {
  align-self: flex-start;
  padding: 2px 8px;
  border: 2px solid var(--line);
  color: var(--amber-dim);
  background: color-mix(in srgb, var(--amber) 18%, transparent);
  font-size: 13px;
  letter-spacing: 0.12em;
}

html[data-theme="night"] .tag {
  color: var(--amber);
}

.card h2,
.card h3 {
  font-size: 26px;
  margin: 4px 0 0;
}

.en {
  margin: 0;
  color: var(--faint);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.card p {
  margin: 0;
}

.more {
  margin-top: auto;
  padding-top: 8px;
  color: var(--link);
}

.card-echo {
  box-shadow: 8px 8px 0 var(--amber), 14px 14px 0 var(--shadow);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 42rem) 240px;
  gap: 36px;
  align-items: start;
}

.prose h1 {
  font-size: clamp(32px, 5vw, 48px);
}

.prose p,
.prose li {
  max-width: 42rem;
}

.prose h2 {
  margin-top: 32px;
  font-size: 24px;
}

.callout {
  margin: 20px 0;
  padding: 14px 16px;
  border-left: 6px solid var(--amber);
  background: var(--bg-raise);
}

.facts {
  position: sticky;
  top: 108px;
  padding: 16px;
  border: 2px solid var(--line);
  background: var(--card);
  box-shadow: 8px 8px 0 var(--shadow), -8px 16px 0 var(--green);
  transform: translateY(28px);
}

.facts h2 {
  font-size: 16px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.facts dl {
  margin: 0;
}

.facts dt {
  margin-top: 12px;
  color: var(--faint);
  font-size: 13px;
}

.facts dd {
  margin: 2px 0 0;
  overflow-wrap: anywhere;
}

.page-intro {
  max-width: 42rem;
  margin-bottom: 28px;
}

.page-intro h1 {
  font-size: clamp(36px, 5vw, 52px);
}

.site-footer {
  border-top: 2px solid var(--line);
  padding: 28px 0 36px;
  background: var(--bg-raise);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.site-footer p {
  margin: 0 0 6px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: flex-start;
}

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

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

html.js .reveal {
  animation: rise 0.45s steps(4) both;
}

html.js .reveal:nth-child(2) {
  animation-delay: 0.08s;
}

@keyframes rise {
  from { transform: translateY(12px); }
  to { transform: none; }
}

html.theme-wipe::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 45;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    var(--amber) 0 6px,
    transparent 6px 14px
  );
  animation: wipe 0.42s steps(6) forwards;
}

@keyframes wipe {
  from { transform: translateY(-100%); }
  to { transform: translateY(100%); }
}

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 2px;
}

@media (max-width: 860px) {
  .home-hero,
  .board,
  .lanes,
  .stage,
  .mosaic,
  .doors,
  .shelf,
  .layout,
  main .wrap:not(.stage-wrap) {
    grid-template-columns: 1fr;
    grid-template-areas: none;
  }

  .home-hero .range {
    width: min(100%, 220px);
    justify-self: center;
  }

  .stage {
    min-height: 0;
    padding-bottom: 12px;
  }

  .range {
    width: min(100%, 320px);
    justify-self: center;
    margin: 28px auto 8px;
  }

  .chip {
    width: auto;
    max-width: 42%;
    font-size: 12px;
  }

  .chip.c1 { top: 8px; left: 8px; }
  .chip.c2 { top: 8px; right: 8px; }
  .chip.c3 { left: 8px; bottom: 34%; }

  .door-game,
  .card-echo,
  .card-pixel,
  .door-app {
    grid-area: auto;
    margin: 0;
  }

  main .wrap:not(.stage-wrap) {
    grid-template-columns: 1fr;
  }

  main .wrap:not(.stage-wrap)::before {
    display: none;
  }

  main .wrap:not(.stage-wrap) > * {
    grid-column: 1;
  }

  .facts {
    position: static;
    transform: none;
  }

  .header-row {
    align-items: flex-start;
    padding: 10px 0;
    flex-wrap: wrap;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  html.js .reveal {
    animation: none;
  }
}