:root {
  --ink: #0a0a0b;
  --paper: #f3f0e8;
  --paper-strong: #fffdf7;
  --muted: #74716b;
  --line: rgba(10, 10, 11, 0.16);
  --cyan: #30e6de;
  --cyan-dark: #087b79;
  --orange: #ff6d3a;
  --violet: #a75cff;
  --display: "Avenir Next Condensed", "DIN Condensed", "PingFang SC", sans-serif;
  --body: "Avenir Next", "Hiragino Sans GB", "PingFang SC", sans-serif;
  --mono: "SFMono-Regular", "Roboto Mono", "Menlo", monospace;
  --page-padding: clamp(1.25rem, 4vw, 5rem);
  --section-space: clamp(6rem, 12vw, 11rem);
  color-scheme: light;
  font-family: var(--body);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); overflow-x: hidden; }
body { margin: 0; color: var(--ink); background: var(--paper); overflow-x: hidden; }
body.menu-open { overflow: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
button, input, textarea, select { font: inherit; }
::selection { color: var(--ink); background: var(--cyan); }

@supports (overflow: clip) {
  html, body { overflow-x: clip; }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 200;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--paper);
  background: var(--ink);
  border-radius: 999px;
  transform: translateY(-150%);
  transition: transform 180ms ease;
}
.skip-link:focus { transform: translateY(0); }

:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 4px;
}

.page-progress {
  position: fixed;
  z-index: 160;
  inset: 0 0 auto;
  height: 3px;
  pointer-events: none;
}
.page-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transform: scaleX(0);
  transform-origin: left;
}

.site-header {
  position: fixed;
  z-index: 150;
  inset: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 5.25rem;
  padding: 0 var(--page-padding);
  border-bottom: 1px solid transparent;
  transition: min-height 220ms ease, background 220ms ease, border-color 220ms ease, backdrop-filter 220ms ease;
}
.site-header.is-scrolled,
.compact-header {
  min-height: 4.5rem;
  background: rgba(243, 240, 232, 0.88);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: inherit;
  font-family: var(--display);
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
}
.brand small { margin-left: 0.25rem; font-family: var(--mono); font-size: 0.56rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; }
.brand-mark {
  display: grid;
  width: 2.2rem;
  aspect-ratio: 1;
  place-items: center;
  color: var(--ink);
  background: var(--cyan);
  border: 1px solid var(--ink);
  border-radius: 50% 50% 46% 54% / 54% 43% 57% 46%;
  box-shadow: 3px 3px 0 var(--ink);
  font-family: var(--display);
  font-weight: 900;
}
.site-nav { display: flex; align-items: center; gap: clamp(1rem, 2.8vw, 2.75rem); }
.site-nav a {
  position: relative;
  padding: 0.8rem 0;
  color: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
}
.site-nav a::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}
.site-nav a:hover::after,
.site-nav a[aria-current]::after { transform: scaleX(1); transform-origin: left; }
.menu-toggle { display: none; }

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(28rem, 0.98fr);
  min-height: 100svh;
  padding: clamp(8rem, 13vh, 10rem) var(--page-padding) 4rem;
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.32;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 7.5vw 7.5vw;
  mask-image: linear-gradient(to right, black, transparent 75%);
}
.hero::before {
  content: "";
  position: absolute;
  top: -18rem;
  right: -13rem;
  width: 54rem;
  aspect-ratio: 1;
  border: 1px solid rgba(10, 10, 11, 0.08);
  border-radius: 50%;
}
.hero-copy {
  position: relative;
  z-index: 2;
  align-self: center;
  max-width: 48rem;
  padding-bottom: 5vh;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin: 0 0 1.6rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: clamp(0.68rem, 0.9vw, 0.78rem);
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.eyebrow > span { display: inline-block; width: 2.6rem; height: 2px; background: var(--orange); }
.hero h1 {
  max-width: 11ch;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(4.7rem, 9vw, 9.4rem);
  font-weight: 900;
  letter-spacing: -0.07em;
  line-height: 0.82;
}
.hero h1 span, .hero h1 em { display: block; }
.hero h1 em { color: transparent; -webkit-text-stroke: clamp(1px, 0.13vw, 2px) var(--ink); font-style: normal; }
.hero-lead {
  max-width: 35rem;
  margin: 2.2rem 0 0;
  color: #4f4c47;
  font-size: clamp(1rem, 1.3vw, 1.2rem);
  line-height: 1.85;
}
.hero-actions { display: flex; align-items: center; gap: 1.8rem; margin-top: 2.4rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.4rem;
  gap: 1.5rem;
  padding: 0.8rem 1.3rem 0.8rem 1.6rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}
.button:hover { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--ink); }
.button-primary { background: var(--cyan); }
.button span { font-size: 1.15rem; }
.text-link { display: inline-flex; align-items: center; gap: 0.5rem; min-height: 44px; font-size: 0.88rem; font-weight: 800; text-underline-offset: 0.35rem; }
.text-link span { transition: transform 160ms ease; }
.text-link:hover span { transform: translateX(0.3rem); }
.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 34rem;
  margin: clamp(3rem, 7vh, 5rem) 0 0;
  border-top: 1px solid var(--ink);
}
.hero-facts div { padding: 1rem 0; border-right: 1px solid var(--line); }
.hero-facts div + div { padding-left: 1.2rem; }
.hero-facts div:last-child { border-right: 0; }
.hero-facts dt { font-family: var(--display); font-size: 2rem; font-weight: 900; letter-spacing: -0.04em; }
.hero-facts dd { margin: 0.1rem 0 0; color: var(--muted); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.06em; }

.hero-art {
  --parallax-x: 0px;
  --parallax-y: 0px;
  position: relative;
  align-self: center;
  min-height: min(72vh, 52rem);
  transform: translate(var(--parallax-x), var(--parallax-y));
  transition: transform 140ms ease-out;
}
.hero-art::before {
  content: "";
  position: absolute;
  inset: 13% 0 5% 8%;
  background: var(--ink);
  border-radius: 50% 44% 47% 53% / 49% 38% 62% 51%;
  transform: rotate(-7deg);
  box-shadow: 1.2rem 1.2rem 0 var(--orange);
}
.hero-number {
  position: absolute;
  z-index: 0;
  top: -2%;
  left: -10%;
  color: var(--paper-strong);
  font-family: var(--display);
  font-size: clamp(15rem, 29vw, 34rem);
  font-weight: 900;
  letter-spacing: -0.12em;
  line-height: 0.8;
  opacity: 0.11;
}
.mascot {
  position: absolute;
  z-index: 2;
  right: -4%;
  bottom: 1%;
  width: min(46vw, 43rem);
  filter: drop-shadow(0 2.2rem 2rem rgba(0, 0, 0, 0.26));
}
.orbit { position: absolute; z-index: 1; border: 1px solid var(--cyan); border-radius: 50%; }
.orbit-one { inset: 20% 2% 8% 8%; transform: rotate(18deg); }
.orbit-two { inset: 28% 12% 17% 0; border-color: var(--violet); transform: rotate(-21deg); }
.status-sticker {
  position: absolute;
  z-index: 3;
  top: 17%;
  right: 1%;
  display: grid;
  width: 8rem;
  aspect-ratio: 1;
  place-content: center;
  text-align: center;
  background: var(--orange);
  border: 1px solid var(--ink);
  border-radius: 50%;
  box-shadow: 5px 5px 0 var(--cyan);
  transform: rotate(9deg);
}
.status-sticker span { font-family: var(--mono); font-size: 0.55rem; letter-spacing: 0.16em; }
.status-sticker strong { margin-top: 0.3rem; font-size: 0.82rem; }
.scroll-cue {
  position: absolute;
  z-index: 5;
  right: var(--page-padding);
  bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-decoration: none;
  writing-mode: vertical-rl;
}
.scroll-cue i { width: 1px; height: 3rem; background: var(--ink); animation: scroll-pulse 1.8s ease-in-out infinite; }

.section { padding: var(--section-space) var(--page-padding); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(15rem, 0.6fr); align-items: end; gap: 3rem; }
.section-heading .eyebrow { grid-column: 1 / -1; margin-bottom: -1rem; }
.section-heading h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(3.1rem, 6vw, 6.5rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 0.95;
}
.section-heading > p:last-child { max-width: 30rem; margin: 0 0 0.4rem; color: var(--muted); font-size: 1rem; line-height: 1.85; }

.systems { background: var(--paper-strong); border-top: 1px solid var(--ink); }
.system-list { margin-top: clamp(4rem, 8vw, 7rem); padding: 0; border-top: 1px solid var(--ink); list-style: none; }
.system-row {
  display: grid;
  grid-template-columns: 4rem minmax(15rem, 1fr) minmax(16rem, 0.8fr) 5rem;
  align-items: center;
  min-height: 7.1rem;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
  transition: padding 180ms ease, background 180ms ease;
}
.system-row:hover { padding-inline: 1rem; background: rgba(48, 230, 222, 0.12); }
.system-index, .system-era { font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.12em; }
.system-index { color: var(--orange); }
.system-row h3 { margin: 0; font-family: var(--display); font-size: clamp(1.7rem, 3vw, 3.1rem); letter-spacing: -0.04em; }
.system-row p { margin: 0; color: var(--muted); font-size: 0.82rem; }
.system-era { justify-self: end; padding: 0.45rem 0.55rem; border: 1px solid var(--ink); border-radius: 999px; }
.trademark-note { max-width: 46rem; margin: 2rem 0 0 auto; color: var(--muted); font-size: 0.72rem; line-height: 1.7; }

.experience {
  display: grid;
  grid-template-columns: minmax(23rem, 0.82fr) minmax(27rem, 1.18fr);
  align-items: center;
  gap: clamp(4rem, 9vw, 10rem);
  min-height: 60rem;
  background: #dfe8e4;
}
.device-stage { position: relative; min-height: 48rem; }
.device-stage::before {
  content: "";
  position: absolute;
  inset: 4% -11% 3% 5%;
  border: 1px solid var(--ink);
  border-radius: 50%;
  transform: rotate(-9deg);
}
.device-glow { position: absolute; inset: 18% 0 10% -10%; background: var(--cyan); border-radius: 50%; filter: blur(7rem); opacity: 0.44; }
.phone-frame {
  position: absolute;
  z-index: 2;
  inset: 0 auto auto 50%;
  width: min(23rem, 78%);
  margin: 0;
  padding: 0.55rem;
  background: #111;
  border: 2px solid #2d2d2d;
  border-radius: 3.2rem;
  box-shadow: 0 3rem 5rem rgba(10, 10, 11, 0.28), 0 0 0 1px rgba(255,255,255,0.18) inset;
  transform: translateX(-50%) rotate(-4deg);
}
.phone-frame img { width: 100%; border-radius: 2.7rem; }
.phone-speaker { position: absolute; z-index: 3; top: 1.35rem; left: 50%; width: 5.6rem; height: 1.55rem; background: #050505; border-radius: 999px; transform: translateX(-50%); }
.screen-note {
  position: absolute;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 1rem;
  color: var(--paper-strong);
  background: var(--ink);
  border: 1px solid var(--paper-strong);
  font-size: 0.72rem;
  font-weight: 700;
  box-shadow: 4px 4px 0 var(--orange);
}
.screen-note span { color: var(--cyan); font-family: var(--mono); }
.note-one { top: 24%; left: -4%; transform: rotate(3deg); }
.note-two { right: -9%; bottom: 22%; transform: rotate(-3deg); }
.experience .section-heading { display: block; }
.experience .section-heading .eyebrow { margin-bottom: 1.6rem; }
.experience .section-heading > p:last-child { margin-top: 2rem; }
.feature-stack { margin-top: 3rem; border-top: 1px solid var(--ink); }
.feature-item { display: grid; grid-template-columns: 3.5rem 1fr; gap: 1rem; padding: 1.7rem 0; border-bottom: 1px solid rgba(10,10,11,0.2); }
.feature-glyph { display: grid; width: 2.4rem; aspect-ratio: 1; place-items: center; background: var(--paper-strong); border: 1px solid var(--ink); border-radius: 50%; font-family: var(--mono); font-size: 1.25rem; box-shadow: 3px 3px 0 var(--ink); }
.feature-item h3 { margin: 0 0 0.4rem; font-family: var(--display); font-size: 1.45rem; }
.feature-item p { margin: 0; color: #525753; font-size: 0.88rem; line-height: 1.75; }

.privacy { position: relative; display: grid; grid-template-columns: 1fr 0.9fr; min-height: 47rem; overflow: hidden; color: var(--paper-strong); background: var(--ink); }
.privacy::before { content: ""; position: absolute; top: -40%; left: 42%; width: 42rem; aspect-ratio: 1; background: var(--violet); border-radius: 50%; filter: blur(10rem); opacity: 0.28; }
.privacy-copy { position: relative; z-index: 2; align-self: center; max-width: 47rem; }
.eyebrow.light { color: rgba(255,255,255,0.55); }
.privacy h2 { margin: 0; font-family: var(--display); font-size: clamp(3.5rem, 7vw, 7.5rem); line-height: 0.9; letter-spacing: -0.06em; }
.privacy-copy > p:not(.eyebrow) { max-width: 35rem; margin: 2.2rem 0 1rem; color: rgba(255,255,255,0.65); font-size: 1rem; line-height: 1.9; }
.light-link { color: var(--cyan); }
.privacy-zero { position: relative; z-index: 2; display: flex; align-items: center; justify-content: center; gap: 1.4rem; }
.privacy-zero .zero { color: var(--cyan); font-family: var(--display); font-size: clamp(15rem, 28vw, 29rem); font-weight: 900; line-height: 0.6; text-shadow: 0.03em 0.03em 0 var(--orange); }
.privacy-zero div { display: grid; gap: 0.7rem; }
.privacy-zero strong { font-family: var(--mono); font-size: 0.67rem; letter-spacing: 0.14em; }
.privacy-ticker { position: absolute; z-index: 3; right: 0; bottom: 2rem; left: 0; display: flex; width: max-content; color: var(--ink); background: var(--cyan); border-block: 1px solid var(--paper-strong); transform: rotate(-1.5deg) scale(1.03); overflow: hidden; }
.privacy-ticker span { padding: 0.7rem 0; font-family: var(--display); font-size: 1.25rem; font-weight: 900; letter-spacing: 0.04em; animation: ticker 18s linear infinite; }

.availability { background: var(--paper); }
.availability-top { display: grid; grid-template-columns: 1.2fr 0.55fr; align-items: end; gap: 3rem; }
.availability-top h2 { margin: 0; font-family: var(--display); font-size: clamp(3.4rem, 6.5vw, 7rem); line-height: 0.92; letter-spacing: -0.06em; }
.availability-top > p { margin: 0 0 0.5rem; color: var(--muted); line-height: 1.85; }
.platform-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 5rem; border: 1px solid var(--ink); }
.platform-card { min-height: 22rem; padding: 2rem; border-right: 1px solid var(--ink); transition: color 180ms ease, background 180ms ease; }
.platform-card:last-child { border-right: 0; }
.platform-card:hover { color: var(--paper-strong); background: var(--ink); }
.platform-icon { display: block; min-height: 8rem; font-family: var(--display); font-size: 8rem; font-weight: 200; line-height: 0.8; }
.platform-card p { margin: 2rem 0 0.4rem; color: var(--orange); font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.12em; }
.platform-card h3 { margin: 0; font-family: var(--display); font-size: 3rem; }
.platform-card small { display: block; margin-top: 1rem; color: var(--muted); font-size: 0.75rem; }
.platform-card:hover small { color: rgba(255,255,255,0.62); }
.coming-soon { display: grid; grid-template-columns: 1fr 1.25fr auto; align-items: center; gap: 3rem; margin-top: 4rem; padding: 2.3rem 0; border-block: 1px solid var(--ink); }
.coming-soon > div { display: grid; grid-template-columns: auto 1fr; align-items: center; column-gap: 0.8rem; }
.pulse-dot { grid-row: 1 / 3; width: 0.85rem; aspect-ratio: 1; background: var(--orange); border-radius: 50%; box-shadow: 0 0 0 0 rgba(255,109,58,0.5); animation: pulse 2s infinite; }
.coming-soon p { margin: 0; color: var(--muted); font-size: 0.78rem; line-height: 1.7; }
.coming-soon > div p { font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.15em; }
.coming-soon h3 { margin: 0.2rem 0 0; font-family: var(--display); font-size: 2.2rem; }
.coming-arrow { color: var(--cyan-dark); font-size: 3rem; }

.site-footer { display: grid; grid-template-columns: 1fr 1.3fr 0.7fr; gap: 3rem; padding: 4rem var(--page-padding) 2rem; color: var(--paper-strong); background: var(--ink); }
.footer-brand { display: grid; grid-template-columns: auto 1fr; align-items: center; align-content: start; column-gap: 0.8rem; }
.footer-brand .brand-mark { grid-row: 1 / 3; }
.footer-brand strong { font-family: var(--display); font-size: 1.3rem; }
.footer-brand small { font-family: var(--mono); font-size: 0.55rem; letter-spacing: 0.12em; text-transform: uppercase; }
.site-footer > p { margin: 0; color: rgba(255,255,255,0.56); font-size: 0.76rem; line-height: 1.8; }
.site-footer nav { display: flex; justify-content: flex-end; align-items: flex-start; gap: 1.4rem; }
.site-footer nav a { font-size: 0.75rem; text-underline-offset: 0.3rem; }
.footer-meta { grid-column: 1 / -1; display: flex; justify-content: space-between; margin-top: 3rem; padding-top: 1.2rem; color: rgba(255,255,255,0.42); border-top: 1px solid rgba(255,255,255,0.16); font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.08em; }

.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(2rem); transition: opacity 720ms cubic-bezier(.2,.7,.2,1), transform 720ms cubic-bezier(.2,.7,.2,1); }
.js .reveal.is-visible { opacity: 1; transform: translateY(0); }
.system-row:nth-child(2), .feature-item:nth-child(2), .platform-card:nth-child(2) { transition-delay: 70ms; }
.system-row:nth-child(3), .feature-item:nth-child(3), .platform-card:nth-child(3) { transition-delay: 140ms; }
.system-row:nth-child(4) { transition-delay: 210ms; }
.system-row:nth-child(5) { transition-delay: 280ms; }
.system-row:nth-child(6) { transition-delay: 350ms; }

/* 法律与支持页复用主站视觉，但保持长文本阅读节奏 */
.legal-page { min-height: 100vh; background-color: var(--paper-strong); background-image: linear-gradient(rgba(10,10,11,0.045) 1px, transparent 1px), linear-gradient(90deg, rgba(10,10,11,0.045) 1px, transparent 1px); background-size: 4rem 4rem; }
.compact-header { position: sticky; }
.back-link { display: inline-flex; align-items: center; gap: 0.5rem; min-height: 44px; font-size: 0.8rem; font-weight: 800; text-underline-offset: 0.3rem; }
.legal-shell { width: min(52rem, calc(100% - 2 * var(--page-padding))); margin: 0 auto; padding: clamp(5rem, 10vw, 9rem) 0; }
.legal-shell h1 { margin: 0; font-family: var(--display); font-size: clamp(4.2rem, 10vw, 8rem); letter-spacing: -0.07em; line-height: 0.85; }
.legal-updated { margin: 1.5rem 0 3rem; color: var(--muted); font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.08em; }
.legal-intro { padding: 2rem; background: var(--cyan); border: 1px solid var(--ink); box-shadow: 7px 7px 0 var(--ink); font-family: var(--display); font-size: clamp(1.35rem, 2.5vw, 2rem); font-weight: 800; line-height: 1.35; }
.legal-shell section { padding: 2.6rem 0; border-bottom: 1px solid var(--line); }
.legal-shell section h2 { margin: 0 0 0.8rem; font-family: var(--display); font-size: 1.7rem; }
.legal-shell section p, .legal-shell section li { color: #504d47; line-height: 1.9; }
.legal-shell section p { margin: 0; }
.legal-shell section ol { margin: 0; padding-left: 1.4rem; }
.legal-callout { margin: 3rem 0 0; padding: 1.3rem 1.5rem; color: var(--paper-strong); background: var(--ink); font-size: 0.82rem; line-height: 1.7; }
.legal-footer { display: flex; justify-content: space-between; gap: 2rem; padding: 1.5rem var(--page-padding); color: var(--paper-strong); background: var(--ink); font-family: var(--mono); font-size: 0.65rem; }
.legal-footer a { text-underline-offset: 0.3rem; }
.legal-footer nav { display: flex; gap: 1.5rem; }

/* 支持页的官方交流入口：像一张可撕下的街机活动票，而不是普通联系卡片 */
.feedback-section {
  position: relative;
  margin-top: clamp(3rem, 7vw, 5rem);
  padding: clamp(1.6rem, 4vw, 3rem) !important;
  overflow: hidden;
  color: var(--paper-strong);
  background: var(--ink);
  border: 1px solid var(--ink) !important;
  box-shadow: 0.75rem 0.75rem 0 var(--orange);
}
.feedback-section::after { content: "153194510"; position: absolute; right: -0.3rem; bottom: -1.2rem; color: rgba(255,255,255,0.06); font-family: var(--display); font-size: clamp(4rem, 13vw, 8rem); font-weight: 900; letter-spacing: -0.08em; line-height: 1; pointer-events: none; }
.legal-shell .feedback-section h2 { position: relative; z-index: 1; margin: 0.45rem 0 1rem; color: var(--paper-strong); font-size: clamp(2.4rem, 6vw, 4.5rem); letter-spacing: -0.055em; line-height: 0.95; }
.feedback-kicker { position: relative; z-index: 1; color: var(--cyan) !important; font-family: var(--mono); font-size: 0.62rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; }
.feedback-copy { position: relative; z-index: 1; max-width: 38rem; color: rgba(255,255,255,0.68) !important; font-size: 0.95rem; }
.feedback-link { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 1.5rem; min-height: 6.5rem; margin-top: 2rem; padding: 1.1rem 1.3rem; color: var(--ink); background: var(--cyan); border: 1px solid var(--paper-strong); box-shadow: 0.45rem 0.45rem 0 var(--paper-strong); text-decoration: none; transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease; }
.feedback-link:hover { background: #67eee7; transform: translate(-0.18rem, -0.18rem); box-shadow: 0.65rem 0.65rem 0 var(--paper-strong); }
.feedback-link:active { transform: translate(0.2rem, 0.2rem); box-shadow: 0.2rem 0.2rem 0 var(--paper-strong); }
.feedback-link > span:first-child { display: grid; gap: 0.25rem; }
.feedback-link small { font-family: var(--mono); font-size: 0.56rem; font-weight: 800; letter-spacing: 0.15em; }
.feedback-link strong { font-family: var(--display); font-size: clamp(1.8rem, 5vw, 3.2rem); letter-spacing: -0.04em; line-height: 1; }
.feedback-action { display: inline-flex; align-items: center; gap: 0.65rem; font-size: 0.76rem; font-weight: 900; }
.feedback-action b { font-size: 1.5rem; font-weight: 500; }
.feedback-note { position: relative; z-index: 1; margin-top: 1.4rem !important; color: rgba(255,255,255,0.5) !important; font-size: 0.72rem; line-height: 1.75 !important; }

/* 更新日志用纵向出版时间轴延续主站的编辑视觉 */
.changelog-shell { width: min(68rem, calc(100% - 2 * var(--page-padding))); }
.release-entry {
  display: grid;
  grid-template-columns: minmax(16rem, 0.7fr) minmax(20rem, 1.3fr);
  gap: clamp(2rem, 6vw, 6rem);
  margin-top: clamp(4rem, 8vw, 7rem);
  padding: clamp(2rem, 5vw, 4rem);
  background: var(--paper-strong);
  border: 1px solid var(--ink);
  box-shadow: 0.8rem 0.8rem 0 var(--ink);
}
.release-entry > header { align-self: start; }
.release-entry > header > div { display: flex; align-items: center; gap: 1rem; }
.release-entry time { color: var(--muted); font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.08em; }
.release-status { padding: 0.45rem 0.6rem; color: var(--ink); background: var(--cyan); border: 1px solid var(--ink); font-family: var(--mono); font-size: 0.56rem; font-weight: 800; letter-spacing: 0.12em; }
.release-entry h2 { margin: 2rem 0 0; font-family: var(--display); font-size: clamp(3.2rem, 6vw, 6rem); letter-spacing: -0.06em; line-height: 0.88; }
.release-entry header p { margin: 1rem 0 0; color: var(--orange); font-family: var(--mono); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.release-body { padding-left: clamp(1.5rem, 4vw, 4rem); border-left: 1px solid var(--line); }
.release-body > p { margin: 0; font-size: clamp(1.15rem, 2vw, 1.45rem); font-weight: 700; line-height: 1.7; }
.release-body ul { margin: 2rem 0 0; padding: 0; list-style: none; }
.release-body li { position: relative; padding: 1.1rem 0 1.1rem 2rem; color: #504d47; border-top: 1px solid var(--line); line-height: 1.7; }
.release-body li::before { content: "+"; position: absolute; left: 0; color: var(--orange); font-family: var(--mono); font-weight: 900; }
.release-empty { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 2rem; margin-top: 4rem; padding-top: 2rem; border-top: 1px solid var(--ink); }
.release-empty span { color: transparent; -webkit-text-stroke: 1px var(--ink); font-family: var(--display); font-size: clamp(3rem, 8vw, 7rem); font-weight: 900; line-height: 1; }
.release-empty p { max-width: 32rem; margin: 0 0 0 auto; color: var(--muted); line-height: 1.8; }

@keyframes scroll-pulse { 0%, 100% { transform: scaleY(0.35); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } }
@keyframes ticker { to { transform: translateX(-100%); } }
@keyframes pulse { 70% { box-shadow: 0 0 0 0.65rem rgba(255,109,58,0); } 100% { box-shadow: 0 0 0 0 rgba(255,109,58,0); } }

@media (max-width: 1050px) {
  .hero { grid-template-columns: 1fr 0.8fr; }
  .hero h1 { font-size: clamp(4.3rem, 9.7vw, 7.5rem); }
  .mascot { right: -18%; width: min(55vw, 40rem); }
  .system-row { grid-template-columns: 3rem minmax(13rem, 1fr) minmax(12rem, 0.7fr) 4.5rem; }
  .experience { gap: 4rem; }
  .note-one { left: -10%; }
  .note-two { right: -14%; }
}

@media (max-width: 820px) {
  .site-header { min-height: 4.6rem; }
  .menu-toggle {
    display: grid;
    width: 44px;
    height: 44px;
    padding: 0;
    place-content: center;
    gap: 6px;
    color: inherit;
    background: var(--paper-strong);
    border: 1px solid var(--ink);
    border-radius: 50%;
  }
  .menu-toggle span:not(.sr-only) { display: block; width: 18px; height: 2px; background: currentColor; transition: transform 180ms ease; }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }
  .site-nav {
    position: absolute;
    inset: 4.6rem 0 auto;
    display: grid;
    gap: 0;
    padding: 1rem var(--page-padding) 1.5rem;
    background: var(--paper-strong);
    border-bottom: 1px solid var(--ink);
    transform: translateY(-140%);
    visibility: hidden;
    transition: transform 220ms ease, visibility 220ms;
  }
  .site-nav.is-open { transform: translateY(0); visibility: visible; }
  .site-nav a { padding: 0.95rem 0; border-bottom: 1px solid var(--line); }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 8rem; }
  .hero-copy { max-width: 42rem; padding-bottom: 0; }
  .hero h1 { max-width: 9ch; font-size: clamp(4.2rem, 15vw, 7.5rem); }
  .hero-art { min-height: 35rem; margin-top: -2rem; }
  .hero-art::before { inset: 12% 6% 3% 14%; }
  .mascot { right: 3%; width: min(70vw, 36rem); }
  .status-sticker { right: 7%; }
  .scroll-cue { display: none; }
  .section-heading, .availability-top { grid-template-columns: 1fr; align-items: start; gap: 1.5rem; }
  .section-heading .eyebrow { margin-bottom: 0; }
  .system-row { grid-template-columns: 2.5rem 1fr auto; min-height: 6.3rem; }
  .system-row p { grid-column: 2 / -1; margin-top: -1rem; }
  .system-era { grid-column: 3; grid-row: 1; }
  .experience { grid-template-columns: 1fr; min-height: auto; }
  .device-stage { min-height: 44rem; }
  .phone-frame { width: min(21rem, 66vw); }
  .note-one { left: 7%; }
  .note-two { right: 4%; }
  .privacy { grid-template-columns: 1fr; gap: 4rem; }
  .privacy-zero { justify-content: flex-start; }
  .privacy-zero .zero { font-size: clamp(15rem, 55vw, 25rem); }
  .platform-grid { grid-template-columns: 1fr; }
  .platform-card { min-height: 14rem; border-right: 0; border-bottom: 1px solid var(--ink); }
  .platform-card:last-child { border-bottom: 0; }
  .platform-icon { float: right; min-height: 0; font-size: 6rem; }
  .platform-card p { margin-top: 0; }
  .coming-soon { grid-template-columns: 1fr auto; }
  .coming-soon > p { grid-column: 1 / -1; grid-row: 2; }
  .coming-arrow { grid-column: 2; grid-row: 1; }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .site-footer > p { grid-column: 1 / -1; grid-row: 2; }
  .site-footer nav { justify-content: flex-end; }
  .footer-meta { grid-row: 3; }
  .release-entry { grid-template-columns: 1fr; }
  .release-body { padding: 2rem 0 0; border-top: 1px solid var(--line); border-left: 0; }
}

@media (max-width: 540px) {
  :root { --page-padding: 1.2rem; --section-space: 5.6rem; }
  .brand small { display: none; }
  .hero { padding-bottom: 3rem; }
  .hero-grid { background-size: 4.5rem 4.5rem; }
  .hero h1 { font-size: clamp(4.1rem, 20vw, 6.1rem); line-height: 0.84; }
  .hero-lead { font-size: 0.97rem; line-height: 1.75; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 0.8rem; }
  .hero-facts { margin-top: 2.5rem; }
  .hero-facts div + div { padding-left: 0.7rem; }
  .hero-facts dt { font-size: 1.55rem; }
  .hero-facts dd { font-size: 0.58rem; }
  .hero-art { min-height: 28rem; margin-top: -0.5rem; }
  .hero-art::before { inset: 14% 0 3% 5%; box-shadow: 0.7rem 0.7rem 0 var(--orange); }
  .mascot { right: -10%; bottom: 0; width: 91vw; }
  .status-sticker { top: 13%; right: 0; width: 6.3rem; }
  .section-heading h2, .availability-top h2 { font-size: clamp(3rem, 15vw, 4.5rem); }
  .system-row { grid-template-columns: 2rem 1fr; gap: 0.6rem; padding: 1.2rem 0; }
  .system-row h3 { font-size: 1.6rem; }
  .system-row p { grid-column: 2; margin-top: 0; }
  .system-era { display: none; }
  .experience { padding-inline: 1rem; }
  .device-stage { min-height: 36rem; }
  .device-stage::before { inset: 4% -2% 4% 1%; }
  .phone-frame { width: min(18rem, 76vw); border-radius: 2.5rem; }
  .phone-frame img { border-radius: 2rem; }
  .phone-speaker { top: 1.15rem; }
  .screen-note { font-size: 0.6rem; padding: 0.6rem 0.7rem; }
  .note-one { top: 18%; left: 0; }
  .note-two { right: 0; bottom: 16%; }
  .feature-item { grid-template-columns: 3rem 1fr; }
  .privacy { padding-bottom: 8rem; }
  .privacy h2 { font-size: clamp(3.5rem, 17vw, 5rem); }
  .privacy-zero { gap: 0.6rem; }
  .privacy-zero .zero { font-size: 55vw; }
  .privacy-zero strong { font-size: 0.54rem; }
  .platform-card { padding: 1.5rem; }
  .coming-soon { gap: 1.2rem; }
  .site-footer { grid-template-columns: 1fr; }
  .site-footer nav { justify-content: flex-start; }
  .site-footer > p { grid-column: 1; grid-row: auto; }
  .footer-meta { grid-row: auto; flex-direction: column; gap: 0.65rem; }
  .legal-shell { width: calc(100% - 2.4rem); padding-block: 4rem; }
  .legal-shell h1 { font-size: clamp(4rem, 20vw, 6rem); }
  .legal-intro { padding: 1.4rem; box-shadow: 5px 5px 0 var(--ink); }
  .feedback-section { box-shadow: 0.45rem 0.45rem 0 var(--orange); }
  .feedback-link { grid-template-columns: 1fr; align-items: start; gap: 0.9rem; min-height: 0; }
  .feedback-action { justify-content: space-between; padding-top: 0.8rem; border-top: 1px solid rgba(10,10,11,0.22); }
  .legal-footer { align-items: flex-start; flex-direction: column; }
  .legal-footer nav { flex-wrap: wrap; }
  .release-entry { padding: 1.5rem; box-shadow: 0.45rem 0.45rem 0 var(--ink); }
  .release-entry h2 { font-size: 3.4rem; }
  .release-empty { grid-template-columns: 1fr; gap: 1rem; }
  .release-empty p { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
  .hero-art { transform: none !important; }
}