:root {
  color-scheme: dark;
  --font-ui: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-code: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --ambient-shade: rgba(16, 18, 15, .72);
  --ambient-vignette: rgba(0, 0, 0, .3);
  --ambient-image: none;
  --bg: #10120f;
  --bg-soft: #171a16;
  --panel: #1c201b;
  --panel-hover: #232820;
  --ink: #f0f0e8;
  --muted: #a3a79b;
  --faint: #74796e;
  --line: #34392f;
  --accent: #c7f36a;
  --accent-ink: #171b10;
  --warm: #f2a987;
  --max-width: 1120px;
  --sans: var(--font-ui);
  --mono: var(--font-code);
  --ambient-overlay: .7;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #e9e9e2;
  --bg-soft: #e1e2db;
  --panel: #f0f0e9;
  --panel-hover: #e9eadf;
  --ink: #20241c;
  --muted: #4c5348;
  --faint: #626a5f;
  --line: #c6cabc;
  --accent: #4d710e;
  --accent-ink: #fff;
  --warm: #b95831;
  --ambient-overlay: .76;
  --ambient-shade: rgba(233, 233, 226, .76);
  --ambient-vignette: rgba(255, 255, 255, .06);
}

:root[data-style="default"] {
  --font-ui: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
}

:root[data-style="sakura"] {
  --accent: #ffacc8;
  --accent-ink: #291620;
  --warm: #ffc37b;
  --bg: #17121b;
  --bg-soft: #201824;
  --panel: #251c29;
  --panel-hover: #302334;
  --line: #443342;
  --font-ui: "Trebuchet MS", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: Georgia, "Songti SC", serif;
}

:root[data-style="paper"] {
  --accent: #bd5c37;
  --accent-ink: #fff8ec;
  --warm: #96652d;
  --bg: #191713;
  --bg-soft: #211e18;
  --panel: #28241c;
  --panel-hover: #322c22;
  --ink: #f2eadb;
  --muted: #b5aa95;
  --faint: #8e8472;
  --line: #453e31;
  --font-ui: "Palatino Linotype", "Book Antiqua", "Songti SC", serif;
  --font-display: "Palatino Linotype", "Songti SC", serif;
}

:root[data-style="arcade"] {
  --accent: #72e3ff;
  --accent-ink: #081820;
  --warm: #ffa0df;
  --bg: #0b101c;
  --bg-soft: #101827;
  --panel: #121d2d;
  --panel-hover: #18273b;
  --line: #283b54;
  --font-ui: "SFMono-Regular", Consolas, "Microsoft YaHei", monospace;
  --font-display: "SFMono-Regular", Consolas, "Microsoft YaHei", monospace;
}

:root[data-style="ocean"] {
  --accent: #80e0c1;
  --accent-ink: #09221e;
  --warm: #ffbd8a;
  --bg: #0c171a;
  --bg-soft: #112124;
  --panel: #14282a;
  --panel-hover: #193331;
  --line: #2d4943;
  --font-ui: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Palatino Linotype", "Songti SC", serif;
}

:root[data-style="default"][data-theme="light"],
:root[data-style="sakura"][data-theme="light"],
:root[data-style="paper"][data-theme="light"],
:root[data-style="arcade"][data-theme="light"],
:root[data-style="ocean"][data-theme="light"] {
  color-scheme: light;
  --bg: #e9e7e2;
  --bg-soft: #dfddd8;
  --panel: #f0efea;
  --panel-hover: #e8e6df;
  --ink: #292523;
  --muted: #514b48;
  --faint: #625c58;
  --line: #c9c3bd;
  --ambient-overlay: .78;
  --ambient-shade: rgba(233, 231, 226, .76);
  --ambient-vignette: rgba(255, 255, 255, .06);
}

:root[data-style="sakura"][data-theme="light"] {
  --accent: #a93664;
  --accent-ink: #fff;
  --warm: #a45221;
}

:root[data-style="paper"][data-theme="light"] {
  --accent: #9c4829;
  --accent-ink: #fff8ec;
  --warm: #80511f;
  --bg: #eee8da;
  --bg-soft: #e5dece;
  --panel: #f7f2e7;
  --panel-hover: #fff9ed;
  --ink: #302c25;
  --muted: #696151;
  --faint: #665f52;
  --line: #d4c9b6;
}

:root[data-style="arcade"][data-theme="light"] {
  --accent: #087798;
  --accent-ink: #fff;
  --warm: #a42d78;
}

:root[data-style="ocean"][data-theme="light"] {
  --accent: #14745d;
  --accent-ink: #fff;
  --warm: #a45121;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 0; background: var(--bg); color: var(--ink); font: 16px/1.75 var(--font-ui); -webkit-font-smoothing: antialiased; }
body::before { position: fixed; inset: 0; z-index: -1; background-image: radial-gradient(var(--line) .55px, transparent .55px); background-size: 7px 7px; opacity: .16; content: ""; pointer-events: none; }
h1, h2, h3, h4 { font-family: var(--font-display); }
.ambient-background { position: fixed; z-index: 0; inset: 0; overflow: hidden; background: var(--bg); pointer-events: none; }
.ambient-background::before, .ambient-background::after { position: absolute; inset: 0; content: ""; }
.ambient-background::before { background-image: linear-gradient(90deg, var(--ambient-shade), transparent 72%), linear-gradient(0deg, var(--bg), transparent 56%, transparent), var(--ambient-image); background-position: center; background-size: cover; opacity: var(--ambient-overlay); transform: scale(1.015); transition: opacity .35s ease, background-image .35s ease; }
.ambient-background::after { background: radial-gradient(ellipse at 70% 38%, transparent 0, var(--ambient-vignette) 100%); }
body > :not(.ambient-background):not(.site-header):not(.pixel-pet):not(.pixel-pet-impact) { position: relative; z-index: 1; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, select { color: inherit; }
button { cursor: pointer; }
img { display: block; max-width: 100%; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.wrap { width: min(var(--max-width), calc(100% - 48px)); margin-inline: auto; }
.visually-hidden { position: absolute; width: 1px; height: 1px; clip: rect(0, 0, 0, 0); clip-path: inset(50%); overflow: hidden; white-space: nowrap; }
.pixel-pet { position: fixed; z-index: 60; top: 12px; left: 12px; display: grid; width: 80px; height: 32px; padding: 0; place-items: center; border: 0; border-radius: 0; background: transparent; box-shadow: none; cursor: grab; touch-action: none; }
.pixel-pet:active { cursor: grabbing; }
.pixel-pet > img:first-child { width: 100%; height: 100%; border-radius: 0; object-fit: contain; }
.pixel-pet:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.pixel-pet.is-exploding { pointer-events: none; }
.pixel-pet.is-exploding > img:first-child { opacity: 0; }
.pixel-pet-explosion-image { position: absolute; z-index: 3; top: 50%; left: 50%; width: 260px !important; height: 233px !important; max-width: none; transform: translate(-50%, -50%) scale(.25); border-radius: 0 !important; object-fit: contain !important; opacity: 0; mix-blend-mode: screen; pointer-events: none; }
.pixel-pet.is-exploding .pixel-pet-explosion-image { animation: pet-explosion-gif .9s ease-out both; }
.pixel-pet.is-respawning > img:first-child { animation: pet-respawn .46s cubic-bezier(.2, 1.5, .4, 1) both; }
.pixel-pet-counter { position: absolute; top: -23px; left: 50%; min-width: 24px; padding: 2px 6px; transform: translateX(-50%); border: 1px solid color-mix(in srgb, var(--accent) 55%, var(--line)); border-radius: 999px; background: color-mix(in srgb, var(--panel) 94%, transparent); color: var(--accent); font: 700 12px/1.2 var(--font-code); text-align: center; box-shadow: 0 2px 8px rgba(0, 0, 0, .24); pointer-events: none; }
.pixel-pet-counter.is-below { top: calc(100% + 3px); }
.pixel-pet-counter.is-side-left { top: 50%; right: calc(100% + 3px); left: auto; transform: translateY(-50%); }
.pixel-pet-counter.is-side-right { top: 50%; right: auto; left: calc(100% + 3px); transform: translateY(-50%); }
.pixel-pet-counter.color-one { color: #ff8066; }
.pixel-pet-counter.color-two { color: #52cfff; }
.pixel-pet-counter.color-three { color: #df80ff; }
.pixel-pet-counter.is-pop { animation: pet-counter-pop .34s cubic-bezier(.2, 1.5, .4, 1) both; }
.pixel-pet-counter.is-milestone { animation-name: pet-counter-pop, pet-counter-flash; animation-duration: .34s, .72s; animation-timing-function: cubic-bezier(.2, 1.5, .4, 1), steps(2, end); }
.pixel-pet-meow { position: absolute; z-index: 1; top: calc(100% + 8px); left: 0; width: max-content; max-width: min(320px, 75vw); padding: 5px 9px; transform: translateY(-8px) scale(.7); border: 1px solid var(--line); border-radius: 8px; background: var(--panel); color: var(--accent); font: 700 var(--meow-font-size, 14px)/1.25 var(--font-ui); text-align: left; white-space: nowrap; overflow: hidden; opacity: 0; pointer-events: none; transition: opacity .18s ease, transform .22s cubic-bezier(.2, 1.5, .4, 1); }
.pixel-pet-meow-track { display: flex; width: max-content; }
.pixel-pet-meow-text { flex: none; padding-right: 2em; }
.pixel-pet-meow.is-overflowing .pixel-pet-meow-track { animation: pet-meow-scroll 8s linear infinite; }
.pixel-pet.is-meow-left:not(.is-meow-side) .pixel-pet-meow { right: 4px; left: auto; }
.pixel-pet.is-meow-above .pixel-pet-meow { top: auto; bottom: calc(100% + 8px); transform: translateY(8px) scale(.7); }
.pixel-pet.is-meow-side-left .pixel-pet-meow { top: calc(100% + 8px); right: calc(100% + 8px); left: auto; transform: translateY(-8px) scale(.7); }
.pixel-pet.is-meow-side-right .pixel-pet-meow { top: calc(100% + 8px); right: auto; left: calc(100% + 8px); transform: translateY(-8px) scale(.7); }
.pixel-pet-meow.is-visible { opacity: 1 !important; transform: translateY(0) scale(1) !important; }
.pixel-pet.is-meow-side-left .pixel-pet-meow.is-visible,
.pixel-pet.is-meow-side-right .pixel-pet-meow.is-visible { transform: translateY(0) scale(1) !important; }
.pixel-pet-impact { position: fixed; z-index: 59; width: 12px; height: 12px; margin: -6px 0 0 -6px; border: 2px solid var(--accent); border-radius: 50%; opacity: 0; pointer-events: none; }
.pixel-pet-impact.is-active { animation: pet-cursor-launch .5s steps(4, end) both; }
.pixel-text-flicker { animation: pet-text-flicker .46s steps(2, end) both; }
@keyframes pet-explosion-gif {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(.25); }
  18% { opacity: 1; transform: translate(-50%, -50%) scale(.72); }
  78% { opacity: 1; transform: translate(-50%, -50%) scale(1.15); }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(1.4); }
}
@keyframes pet-respawn {
  0% { opacity: 0; transform: scale(.2) rotate(-70deg); }
  100% { opacity: 1; transform: scale(1) rotate(0); }
}
@keyframes pet-counter-pop {
  0% { opacity: .35; transform: translate(-50%, 8px) scale(.55); }
  65% { opacity: 1; transform: translate(-50%, -5px) scale(1.25); }
  100% { opacity: 1; transform: translate(-50%, 0) scale(1); }
}
@keyframes pet-counter-flash {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(2.4); }
}
@keyframes pet-cursor-launch {
  0% { opacity: .95; transform: translate(0, 0) scale(.55); }
  100% { opacity: 0; transform: translate(var(--pet-kick-x), var(--pet-kick-y)) scale(2.6); }
}
@keyframes pet-text-flicker {
  0%, 100% { opacity: 1; filter: none; }
  20% { opacity: .24; filter: brightness(1.8); }
  42% { opacity: .9; filter: none; }
  64% { opacity: .35; filter: brightness(1.6); }
  82% { opacity: 1; }
}
@keyframes pet-meow-scroll {
  to { transform: translateX(-50%); }
}

.site-header { position: relative; z-index: 20; display: flex; width: min(var(--max-width), calc(100% - 48px)); height: 82px; align-items: center; justify-content: space-between; margin: auto; border-bottom: 1px solid var(--line); }
.site-header { padding-left: 52px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 800 12px/1.1 var(--font-code); letter-spacing: .15em; }
.brand img { width: 36px; height: 36px; object-fit: contain; }
.brand small { display: block; margin-top: 6px; color: var(--muted); font-size: 8px; font-weight: 400; letter-spacing: .12em; }
.header-actions { display: flex; align-items: center; gap: 8px; }
.primary-nav { display: flex; align-items: center; gap: clamp(18px, 3vw, 38px); }
.primary-nav a { position: relative; padding: 8px 0; color: var(--muted); font-size: 14px; transition: color .2s; }
.primary-nav a:hover, .primary-nav a[aria-current="page"] { color: var(--ink); }
.primary-nav a[aria-current="page"]::after { position: absolute; right: 0; bottom: 0; left: 0; height: 2px; background: var(--accent); content: ""; }
.theme-toggle, .style-toggle, .background-toggle, .menu-toggle { display: grid; width: 38px; height: 38px; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: var(--bg-soft); color: var(--muted); }
.theme-toggle { font-size: 19px; }
.style-toggle, .background-toggle { font-size: 14px; }
.theme-toggle:hover, .style-toggle:hover, .background-toggle:hover, .menu-toggle:hover { border-color: var(--accent); color: var(--accent); }
.menu-toggle { display: none; width: auto; padding: 0 12px; border-radius: 5px; font-size: 11px; }
.style-announcement { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); clip-path: inset(50%); white-space: nowrap; }

:root[data-card-style="rounded"] .article-card,
:root[data-card-style="rounded"] .catalog-card,
:root[data-card-style="rounded"] .tool-panel,
:root[data-card-style="rounded"] .hero-note,
:root[data-card-style="rounded"] .discussion-box,
:root[data-card-style="rounded"] .neighbor-link,
:root[data-card-style="rounded"] .catalog-note,
:root[data-card-style="rounded"] .home-article {
  border-radius: 14px;
  background-color: color-mix(in srgb, var(--panel) 90%, transparent);
  box-shadow: 0 12px 32px rgba(0, 0, 0, .12);
  backdrop-filter: blur(12px);
}
:root[data-card-style="framed"] .article-card,
:root[data-card-style="framed"] .catalog-card,
:root[data-card-style="framed"] .tool-panel,
:root[data-card-style="framed"] .hero-note,
:root[data-card-style="framed"] .discussion-box,
:root[data-card-style="framed"] .neighbor-link,
:root[data-card-style="framed"] .catalog-note,
:root[data-card-style="framed"] .home-article {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  background-color: color-mix(in srgb, var(--panel) 94%, var(--accent));
  box-shadow: inset 3px 0 var(--accent);
}

.eyebrow { margin: 0 0 15px; color: var(--accent); font: 12px/1.4 var(--mono); letter-spacing: .14em; text-transform: uppercase; }
.live-dot { display: inline-block; width: 7px; height: 7px; margin: 0 7px 1px 0; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px color-mix(in srgb, var(--accent) 65%, transparent); }
.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; gap: 18px; padding: 0 17px; border: 1px solid transparent; border-radius: 4px; font-size: 12px; font-weight: 700; transition: transform .2s, background .2s, border-color .2s; }
.button:hover { transform: translateY(-2px); }
.button-dark { background: var(--accent); color: var(--accent-ink); }
.button-outline { border-color: var(--line); background: transparent; color: var(--ink); }
.button-outline:hover { border-color: var(--accent); color: var(--accent); }
.text-link { display: inline-flex; align-items: center; gap: 11px; color: var(--muted); font-size: 12px; }
.text-link:hover { color: var(--accent); }
.page-intro { max-width: 710px; padding: 84px 0 52px; }
.page-intro h1, .not-found h1 { margin: 0; font-size: clamp(48px, 8vw, 92px); font-weight: 600; letter-spacing: -.07em; line-height: 1.08; }
.page-intro h1 span, .not-found h1 span { color: var(--accent); }
.page-intro > p:last-child { max-width: 510px; margin: 23px 0 0; color: var(--muted); font-size: 14px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 25px; }
.section-heading h2 { margin: 0; font-size: clamp(25px, 3vw, 34px); font-weight: 600; letter-spacing: -.05em; }
.section-heading .eyebrow { margin-bottom: 8px; }
.site-footer { display: flex; min-height: 88px; align-items: center; justify-content: space-between; gap: 20px; margin-top: 80px; border-top: 1px solid var(--line); color: var(--faint); font: 11px var(--mono); letter-spacing: .08em; }
.site-footer > div { display: flex; gap: 20px; }
.site-footer a:hover { color: var(--accent); }
.footer-brand { color: var(--ink); }
.loading-note, .empty-state { padding: 26px; border: 1px dashed var(--line); color: var(--muted); font-size: 13px; }
.not-found { min-height: 65vh; padding-top: 120px; }
.not-found > p:not(.eyebrow) { margin: 22px 0; color: var(--muted); }

@media (max-width: 700px) {
  .wrap, .site-header { width: calc(100% - 32px); }
  .site-header { position: sticky; top: 0; height: 70px; background: color-mix(in srgb, var(--bg) 94%, transparent); backdrop-filter: blur(14px); }
  .site-header { padding-left: 0; }
  .pixel-pet { width: 64px; height: 26px; top: 108px; left: 8px; }
  .header-actions { margin-left: auto; }
  .menu-toggle { display: grid; margin-left: 9px; order: 2; }
  .theme-toggle, .style-toggle, .background-toggle { width: 34px; height: 34px; }
  .primary-nav { position: absolute; z-index: 21; top: 69px; right: 0; left: 0; display: none; align-items: stretch; gap: 0; padding: 8px 16px; border: 1px solid var(--line); background: var(--panel); box-shadow: 0 14px 32px rgba(0, 0, 0, .22); }
  .primary-nav.is-open { display: flex; flex-direction: column; }
  .primary-nav a { padding: 12px 4px; border-bottom: 1px solid var(--line); }
  .primary-nav a:last-child { border-bottom: 0; }
  .primary-nav a[aria-current="page"]::after { right: auto; width: 24px; }
  .page-intro h1, .not-found h1 { font-size: clamp(40px, 10vw, 64px); }
  .page-intro { padding: 63px 0 34px; }
  .site-footer { align-items: flex-start; flex-wrap: wrap; padding: 22px 0; }
  .site-footer > span { order: 3; width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .pixel-pet.is-exploding .pixel-pet-explosion-image, .pixel-pet.is-respawning > img:first-child,
  .pixel-pet-impact.is-active, .pixel-pet-counter.is-pop, .pixel-pet-counter.is-milestone,
  .pixel-text-flicker { animation: none; }
  .pixel-pet.is-exploding .pixel-pet-explosion-image { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  .pixel-pet-meow.is-visible { opacity: 1 !important; transform: translateY(0) scale(1) !important; }
}

@media (max-width: 390px) {
  .brand { gap: 7px; }
  .brand img { width: 30px; height: 30px; }
  .brand small { font-size: 7px; }
  .header-actions { gap: 5px; }
  .theme-toggle, .style-toggle, .background-toggle { width: 30px; height: 30px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}