:root {
  color-scheme: dark;
  --bg: #05070b;
  --bg-soft: #090d13;
  --surface: rgba(14, 21, 30, 0.82);
  --surface-solid: #0c1119;
  --line: rgba(166, 221, 236, 0.14);
  --line-strong: rgba(126, 226, 248, 0.32);
  --text: #f2f7fb;
  --muted: #94a3b1;
  --dim: #66737f;
  --cyan: #72e6ff;
  --cyan-strong: #25c7e9;
  --cyan-glow: rgba(72, 218, 247, 0.24);
  --violet: #8498ff;
  --max: 1240px;
  --header: 72px;
  --radius: 18px;
  --font: "Segoe UI Variable", "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 18%, rgba(39, 145, 173, 0.08), transparent 26rem),
    radial-gradient(circle at 88% 62%, rgba(91, 79, 164, 0.07), transparent 30rem),
    var(--bg);
  font-family: var(--font);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

button,
a {
  color: inherit;
}

a {
  text-decoration: none;
}

button {
  font: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.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;
}

.page-progress {
  position: fixed;
  z-index: 120;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  pointer-events: none;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  box-shadow: 0 0 18px var(--cyan-glow);
  transform: scaleX(0);
  transform-origin: left center;
}

.ambient,
.hud-grid {
  position: fixed;
  pointer-events: none;
  z-index: -1;
}

.ambient {
  border-radius: 999px;
  filter: blur(110px);
  opacity: 0.15;
}

.ambient-a {
  width: 34rem;
  height: 34rem;
  top: 8rem;
  left: -20rem;
  background: var(--cyan-strong);
}

.ambient-b {
  width: 42rem;
  height: 42rem;
  right: -28rem;
  top: 48%;
  background: var(--violet);
}

.hud-grid {
  inset: 0;
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(114, 230, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(114, 230, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, transparent 0, black 18%, black 82%, transparent 100%);
}

.section-shell,
.header-inner,
.hero-inner {
  width: min(calc(100% - 48px), var(--max));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header);
  border-bottom: 1px solid transparent;
  transition: background 220ms ease, border-color 220ms ease, backdrop-filter 220ms ease;
}

.site-header.is-scrolled,
.site-header.menu-visible {
  border-color: var(--line);
  background: rgba(5, 7, 11, 0.82);
  backdrop-filter: blur(22px) saturate(130%);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 38px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  letter-spacing: 0.08em;
  font-size: 0.86rem;
  font-weight: 700;
}

.brand-cn {
  color: var(--cyan);
}

.brand-en {
  color: rgba(242, 247, 251, 0.82);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
}

.brand-logo {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  object-fit: contain;
  filter: drop-shadow(0 0 10px rgba(80, 218, 255, 0.3));
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.site-nav a {
  position: relative;
  color: rgba(219, 229, 236, 0.68);
  font-size: 0.78rem;
  transition: color 180ms ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -9px;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 7px var(--cyan);
  transition: right 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  right: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.language-toggle,
.footer-inner button,
.menu-toggle {
  border: 0;
  cursor: pointer;
  background: transparent;
}

.language-toggle {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px;
  color: var(--dim);
  font-size: 0.65rem;
}

.language-toggle i {
  width: 1px;
  height: 11px;
  background: var(--line-strong);
}

.language-toggle [aria-current="true"] {
  color: var(--cyan);
}

.header-download {
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  color: var(--cyan);
  font-size: 0.72rem;
  transition: background 180ms ease, color 180ms ease;
}

.header-download:hover,
.header-download:focus-visible {
  color: #031016;
  background: var(--cyan);
}

.menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  margin-left: auto;
}

.menu-toggle > span:not(.sr-only) {
  display: block;
  width: 20px;
  height: 1px;
  margin: 6px auto;
  background: var(--text);
  transition: transform 180ms ease;
}

.hero {
  position: relative;
  min-height: min(900px, 100svh);
  overflow: hidden;
  isolation: isolate;
  display: flex;
  align-items: center;
}

.hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: auto 0 0;
  height: 30%;
  background: linear-gradient(transparent, var(--bg));
}

.hero-backdrop {
  position: absolute;
  z-index: -3;
  inset: 0;
  background: #080b11;
}

.hero-backdrop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 64% 50%;
  opacity: 0.72;
  transform: scale(1.025);
  transition: opacity 700ms ease;
}

.hero-backdrop.poster-wall-ready > img {
  opacity: 0.08;
}

.hero-poster-wall {
  position: absolute;
  inset: 0;
  overflow: hidden;
  opacity: 0;
  transition: opacity 900ms ease;
}

.hero-poster-wall.is-ready {
  opacity: 0.6;
}

.hero-poster-grid {
  position: absolute;
  top: 50%;
  left: 50%;
  display: flex;
  width: max-content;
  gap: 10px;
  transform: translate(-50%, -50%) rotate(-25deg);
}

.hero-poster-column {
  --poster-direction: 1;
  display: flex;
  flex: 0 0 clamp(94px, 9vw, 150px);
  flex-direction: column;
  gap: 10px;
  animation: hero-poster-drift calc(17s + var(--column-index) * 1s) ease-in-out infinite alternate;
  animation-delay: calc(var(--column-index) * -1.6s);
}

.hero-poster-column:nth-child(even) {
  --poster-direction: -1;
}

.hero-poster-column img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 3;
  border-radius: 8px;
  object-fit: cover;
  opacity: 1;
  transform: none;
  background: #10151b;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.3);
}

@keyframes hero-poster-drift {
  from { transform: translateY(calc(var(--poster-direction) * -56px)); }
  to { transform: translateY(calc(var(--poster-direction) * 56px)); }
}

.hero-backdrop-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(4, 7, 11, 0.99) 0%, rgba(4, 7, 11, 0.9) 35%, rgba(4, 7, 11, 0.24) 70%, rgba(4, 7, 11, 0.62) 100%),
    linear-gradient(0deg, rgba(4, 7, 11, 0.82) 0%, transparent 38%, rgba(4, 7, 11, 0.32) 100%);
}

.hero-inner {
  padding-top: var(--header);
}

.hero-copy {
  width: min(660px, 62%);
  padding: 72px 0 84px;
}

.eyebrow,
.story-kicker,
.download-kicker {
  color: var(--cyan);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.19em;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 11px;
  margin: 0 0 26px;
}

.eyebrow span {
  width: 28px;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}

.eyebrow b {
  font-weight: 600;
}

.hero h1,
.section-heading h2,
.privacy-copy h2,
.download-shell h2 {
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 1.04;
  text-wrap: balance;
}

.hero h1 {
  font-size: clamp(3.4rem, 7.4vw, 7.2rem);
  text-shadow: 0 20px 60px rgba(0, 0, 0, 0.55);
}

.hero-lead {
  max-width: 590px;
  margin: 30px 0 0;
  color: rgba(218, 228, 236, 0.74);
  font-size: clamp(0.95rem, 1.35vw, 1.12rem);
  line-height: 1.85;
}

.hero-actions,
.download-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 38px;
}

.button {
  min-height: 48px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid transparent;
  border-radius: 7px;
  font-size: 0.82rem;
  font-weight: 600;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
}

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

.button-primary {
  color: #031117;
  background: linear-gradient(115deg, #91efff, #54d5f0 70%, #74bff4);
  box-shadow: 0 10px 34px rgba(37, 199, 233, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.16) inset;
}

.button-primary:hover,
.button-primary:focus-visible {
  box-shadow: 0 15px 42px rgba(37, 199, 233, 0.34), 0 0 22px rgba(114, 230, 255, 0.18);
}

.button-secondary {
  color: rgba(238, 245, 250, 0.86);
  border-color: rgba(221, 237, 244, 0.25);
  background: rgba(7, 10, 15, 0.52);
  backdrop-filter: blur(12px);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: var(--line-strong);
  background: rgba(20, 30, 40, 0.72);
}

.button-community {
  min-height: 44px;
  padding-inline: 14px 17px;
  border-color: color-mix(in srgb, var(--community-color) 42%, transparent);
  background: color-mix(in srgb, var(--community-color) 9%, rgba(7, 10, 15, 0.72));
  color: rgba(239, 248, 252, 0.9);
  font-size: 0.72rem;
  backdrop-filter: blur(12px);
}

.button-community[hidden],
.footer-inner a[hidden] {
  display: none;
}

.button-community-qq {
  --community-color: #57a8ff;
}

.button-community-telegram {
  --community-color: #32b9ed;
}

.community-mark {
  width: 27px;
  height: 27px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 27px;
  border: 1px solid color-mix(in srgb, var(--community-color) 58%, transparent);
  border-radius: 8px;
  background: color-mix(in srgb, var(--community-color) 18%, transparent);
  color: color-mix(in srgb, var(--community-color) 84%, white);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.button-community:hover,
.button-community:focus-visible {
  border-color: color-mix(in srgb, var(--community-color) 78%, transparent);
  background: color-mix(in srgb, var(--community-color) 17%, rgba(12, 18, 25, 0.82));
  box-shadow: 0 10px 28px color-mix(in srgb, var(--community-color) 16%, transparent);
}

.hero-meta {
  display: flex;
  gap: 26px;
  margin-top: 42px;
  color: rgba(181, 198, 210, 0.46);
  font-size: 0.58rem;
  letter-spacing: 0.15em;
}

.hero-meta span:first-child {
  display: flex;
  align-items: center;
  gap: 7px;
}

.hero-meta i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}

.hero-hud {
  position: absolute;
  z-index: 2;
  color: rgba(148, 218, 233, 0.36);
  font: 500 0.52rem/1 var(--font);
  letter-spacing: 0.16em;
}

.hero-hud-top {
  top: calc(var(--header) + 25px);
  left: max(24px, calc((100% - var(--max)) / 2));
  right: max(24px, calc((100% - var(--max)) / 2));
  display: flex;
  justify-content: space-between;
}

.hero-hud-side {
  right: 28px;
  top: 32%;
  height: 210px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
}

.hero-hud-side i {
  width: 1px;
  flex: 1;
  margin: 10px 0;
  background: linear-gradient(transparent, var(--cyan), transparent);
}

.scroll-cue {
  position: absolute;
  bottom: 28px;
  left: 50%;
  width: 32px;
  height: 46px;
  display: flex;
  justify-content: center;
  border: 1px solid rgba(176, 221, 232, 0.18);
  border-radius: 99px;
  transform: translateX(-50%);
}

.scroll-cue span {
  width: 3px;
  height: 7px;
  margin-top: 10px;
  border-radius: 3px;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: scroll-cue 1.8s ease-in-out infinite;
}

@keyframes scroll-cue {
  0%, 100% { transform: translateY(0); opacity: 0.35; }
  50% { transform: translateY(12px); opacity: 1; }
}

.source-strip {
  position: relative;
  z-index: 3;
  border-block: 1px solid var(--line);
  background: rgba(7, 11, 16, 0.72);
  backdrop-filter: blur(18px);
}

.source-strip-inner {
  min-height: 118px;
  display: flex;
  align-items: center;
  gap: 58px;
}

.section-index {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--cyan);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  white-space: nowrap;
}

.section-index i {
  width: 32px;
  height: 1px;
  background: var(--cyan);
  opacity: 0.7;
}

.section-index b {
  color: var(--muted);
  font-weight: 500;
}

.source-list {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 12px;
}

.source-list > span {
  position: relative;
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid rgba(168, 213, 226, 0.1);
  border-radius: 5px;
  color: rgba(209, 222, 230, 0.58);
  background: linear-gradient(135deg, rgba(114, 230, 255, 0.035), transparent);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
}

.source-list > span::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 8px;
  height: 8px;
  border-top: 1px solid var(--cyan);
  border-left: 1px solid var(--cyan);
  opacity: 0.4;
}

.source-logo {
  width: 20px;
  height: 20px;
  display: inline-flex;
  flex: 0 0 20px;
  align-items: center;
  justify-content: center;
  color: rgba(209, 222, 230, 0.72);
}

.source-logo svg,
.source-logo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.source-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.section {
  position: relative;
  padding: clamp(100px, 12vw, 170px) 0;
}

.section-heading {
  max-width: 750px;
  margin-bottom: 74px;
}

.section-heading h2,
.privacy-copy h2 {
  margin-top: 26px;
  font-size: clamp(2.7rem, 5.7vw, 5.5rem);
}

.section-heading > p,
.section-heading-split > p,
.privacy-copy > p {
  max-width: 620px;
  margin: 27px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.story-list {
  display: grid;
  gap: clamp(90px, 12vw, 150px);
}

.story-row {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.72fr);
  align-items: center;
  gap: clamp(48px, 8vw, 110px);
}

.story-row-reverse {
  grid-template-columns: minmax(300px, 0.72fr) minmax(0, 1.45fr);
}

.story-row-reverse .story-visual { order: 2; }
.story-row-reverse .story-copy { order: 1; }

.story-visual,
.gallery-item {
  --tilt-x: 0deg;
  --tilt-y: 0deg;
  --tilt-scale: 1;
  position: relative;
  overflow: hidden;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: zoom-in;
  background: var(--surface-solid);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.38);
  transform: perspective(1100px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) scale(var(--tilt-scale));
  transform-origin: center;
  transform-style: preserve-3d;
  transition:
    transform 220ms cubic-bezier(0.2, 0.7, 0.2, 1),
    border-color 220ms ease,
    box-shadow 220ms ease;
  will-change: transform;
}

.story-visual img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transform: none;
}

.story-visual:hover,
.story-visual:focus-visible,
.gallery-item:hover,
.gallery-item:focus-visible {
  --tilt-scale: 1.025;
  border-color: rgba(114, 230, 255, 0.38);
  box-shadow:
    0 42px 110px rgba(0, 0, 0, 0.48),
    0 0 0 1px rgba(114, 230, 255, 0.08),
    0 0 34px rgba(37, 199, 233, 0.11);
}

.story-visual.is-tilting,
.gallery-item.is-tilting {
  transition-duration: 0ms, 220ms, 220ms;
}

.story-visual > b {
  position: absolute;
  z-index: 2;
  top: 14px;
  left: 16px;
  padding: 5px 8px;
  border: 1px solid rgba(114, 230, 255, 0.2);
  border-radius: 3px;
  color: var(--cyan);
  background: rgba(4, 8, 12, 0.76);
  font-size: 0.52rem;
  letter-spacing: 0.13em;
}

.visual-corner {
  position: absolute;
  z-index: 2;
  right: 12px;
  bottom: 12px;
  width: 22px;
  height: 22px;
  border-right: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
  opacity: 0.45;
}

.story-copy {
  position: relative;
}

.story-number {
  position: absolute;
  top: -68px;
  right: 0;
  color: rgba(114, 230, 255, 0.06);
  font-size: 7.8rem;
  font-weight: 700;
  line-height: 1;
}

.story-kicker {
  position: relative;
  z-index: 1;
  margin: 0 0 17px;
}

.story-copy h3 {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: clamp(2rem, 3.6vw, 3.6rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.12;
}

.story-copy > p:last-child {
  position: relative;
  z-index: 1;
  margin: 24px 0 0;
  color: var(--muted);
}

.feature-section {
  border-block: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 22, 31, 0.52), rgba(6, 9, 14, 0.72));
}

.section-heading-wide {
  max-width: none;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.feature-card {
  min-height: 290px;
  padding: 34px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(6, 10, 15, 0.32);
  transition: background 220ms ease;
}

.feature-card:hover {
  background: rgba(17, 30, 40, 0.58);
}

.feature-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 30px;
}

.feature-card-head span {
  color: var(--cyan);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
}

.feature-icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--cyan);
  font-size: 0.72rem;
}

.feature-card h3 {
  margin: 0 0 17px;
  font-size: 1.3rem;
  font-weight: 600;
}

.feature-card p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.86rem;
}

.feature-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-card li {
  position: relative;
  margin-top: 9px;
  padding-left: 14px;
  color: rgba(196, 211, 220, 0.7);
  font-size: 0.76rem;
}

.feature-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 5px;
  height: 1px;
  background: var(--cyan);
}

.section-heading-split {
  max-width: none;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 60px;
}

.section-heading-split > p {
  width: min(360px, 34%);
  margin-bottom: 10px;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.gallery-item {
  min-width: 0;
}

.gallery-item-wide {
  grid-column: 1 / -1;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 520ms cubic-bezier(0.2, 0.7, 0.2, 1), filter 300ms ease;
}

.gallery-item:not(.gallery-item-wide) img {
  aspect-ratio: 16 / 10;
}

.gallery-item > span {
  position: absolute;
  z-index: 3;
  left: 18px;
  right: 18px;
  bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 0.75rem;
  text-shadow: 0 2px 12px #000;
}

.gallery-item > span b {
  color: var(--cyan);
  font-size: 0.58rem;
}

.gallery-item > span i {
  font-style: normal;
}

.privacy-section {
  padding-top: 80px;
}

.privacy-shell {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(48px, 9vw, 120px);
  overflow: hidden;
  padding: clamp(44px, 7vw, 82px);
  border: 1px solid var(--line-strong);
  border-radius: 22px;
  background:
    radial-gradient(circle at 5% 95%, rgba(37, 199, 233, 0.12), transparent 28rem),
    rgba(8, 14, 20, 0.8);
}

.privacy-shell::before,
.privacy-shell::after {
  content: "";
  position: absolute;
  width: 44px;
  height: 44px;
  pointer-events: none;
}

.privacy-shell::before {
  top: 12px;
  left: 12px;
  border-top: 1px solid var(--cyan);
  border-left: 1px solid var(--cyan);
}

.privacy-shell::after {
  right: 12px;
  bottom: 12px;
  border-right: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
}

.privacy-copy h2 {
  font-size: clamp(2.5rem, 4.6vw, 4.5rem);
}

.privacy-list {
  align-self: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.privacy-list li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  color: rgba(209, 221, 228, 0.74);
  font-size: 0.86rem;
}

.privacy-list li::before {
  content: "✓";
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--cyan);
  font-size: 0.65rem;
}

.privacy-mark {
  position: absolute;
  right: 5%;
  top: 10%;
  width: 130px;
  height: 130px;
  border: 1px solid rgba(114, 230, 255, 0.08);
  border-radius: 50%;
  pointer-events: none;
}

.privacy-mark span,
.privacy-mark i {
  position: absolute;
  inset: 24px;
  border: 1px dashed rgba(114, 230, 255, 0.11);
  border-radius: 50%;
}

.privacy-mark i {
  inset: 48px;
  border-style: solid;
  background: rgba(114, 230, 255, 0.07);
}

.download-section {
  min-height: 680px;
  display: grid;
  place-items: center;
  overflow: hidden;
  text-align: center;
}

.download-backdrop {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, var(--bg), rgba(5, 7, 11, 0.26) 38%, var(--bg)),
    radial-gradient(ellipse at 50% 55%, rgba(37, 199, 233, 0.14), transparent 48%);
}

.download-backdrop::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(840px, 90vw);
  aspect-ratio: 2 / 1;
  border: 1px solid rgba(114, 230, 255, 0.09);
  border-radius: 50%;
  transform: translate(-50%, -50%) perspective(500px) rotateX(68deg);
  box-shadow: 0 0 90px rgba(37, 199, 233, 0.08) inset;
}

.download-shell {
  position: relative;
  z-index: 2;
}

.download-shell h2 {
  margin-top: 17px;
  font-size: clamp(3rem, 6vw, 6rem);
}

.download-shell > p:not(.download-kicker) {
  max-width: 600px;
  margin: 25px auto 0;
  color: var(--muted);
}

.download-actions {
  justify-content: center;
}

.button-large {
  min-height: 56px;
  padding-inline: 28px;
}

.web-store-link {
  color: rgba(202, 216, 225, 0.66);
  font-size: 0.78rem;
  text-decoration: underline;
  text-underline-offset: 5px;
}

.project-stats {
  width: min(720px, 100%);
  margin: 64px auto 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-block: 1px solid var(--line);
}

.project-stats > * {
  min-height: 95px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--line);
}

.project-stats > *:last-child {
  border-right: 0;
}

.project-stats span {
  color: var(--text);
  font-size: 1.25rem;
  font-weight: 600;
}

.project-stats b {
  margin-top: 4px;
  color: var(--dim);
  font-size: 0.52rem;
  font-weight: 500;
  letter-spacing: 0.14em;
}

.site-footer {
  border-top: 1px solid var(--line);
}

.footer-inner {
  min-height: 105px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  color: var(--dim);
  font-size: 0.72rem;
}

.footer-inner p {
  margin: 0;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.footer-logo {
  width: 24px;
  height: 24px;
  flex: 0 0 24px;
  object-fit: contain;
  filter: drop-shadow(0 0 7px rgba(80, 218, 255, 0.24));
}

.footer-inner b {
  color: rgba(218, 229, 235, 0.7);
  font-weight: 500;
}

.footer-inner div {
  display: flex;
  align-items: center;
  gap: 22px;
}

.footer-inner a:hover,
.footer-inner button:hover {
  color: var(--cyan);
}

.footer-inner button {
  padding: 0;
  color: inherit;
}

.image-dialog {
  width: min(94vw, 1440px);
  max-width: none;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  color: var(--text);
  background: #06090e;
  box-shadow: 0 40px 140px rgba(0, 0, 0, 0.72);
}

.image-dialog::backdrop {
  background: rgba(1, 3, 5, 0.84);
  backdrop-filter: blur(12px);
}

.image-dialog img {
  width: 100%;
  max-height: 82vh;
  object-fit: contain;
}

.image-dialog p {
  margin: 0;
  padding: 12px 18px;
  color: var(--muted);
  font-size: 0.76rem;
}

.dialog-close {
  position: absolute;
  z-index: 3;
  top: 10px;
  right: 10px;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: var(--text);
  cursor: pointer;
  background: rgba(0, 0, 0, 0.64);
}

.reveal {
  opacity: 0;
  translate: 0 34px;
  transition: opacity 780ms ease, translate 780ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.reveal.is-visible {
  opacity: 1;
  translate: 0 0;
}

.lyric-reveal {
  perspective: 520px;
}

.lyric-char {
  display: inline-block;
  opacity: 0;
  transform: translateZ(-36px) scale(0.68);
  transform-origin: 50% 68%;
  transform-style: preserve-3d;
  white-space: pre;
  will-change: opacity, transform;
  transition:
    opacity 350ms cubic-bezier(0.4, 0, 0.2, 1) var(--lyric-delay, 0ms),
    transform 350ms cubic-bezier(0.4, 0, 0.2, 1) var(--lyric-delay, 0ms);
}

.lyric-reveal.is-visible .lyric-char {
  opacity: 1;
  transform: translateZ(0) scale(1);
}

.hero-copy > :not(.lyric-reveal),
.section-heading > :not(.lyric-reveal),
.story-row .story-copy > :not(.lyric-reveal),
.feature-card > :not(.lyric-reveal),
.privacy-shell .privacy-copy > :not(.lyric-reveal),
.privacy-shell .privacy-list > *,
.download-shell > :not(.lyric-reveal) {
  opacity: 0;
  translate: 0 14px;
  transition:
    opacity 520ms cubic-bezier(0.4, 0, 0.2, 1),
    translate 520ms cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-copy.is-visible > :not(.lyric-reveal),
.section-heading.is-visible > :not(.lyric-reveal),
.story-row.is-visible .story-copy > :not(.lyric-reveal),
.feature-card.is-visible > :not(.lyric-reveal),
.privacy-shell.is-visible .privacy-copy > :not(.lyric-reveal),
.privacy-shell.is-visible .privacy-list > *,
.download-shell.is-visible > :not(.lyric-reveal) {
  opacity: 1;
  translate: 0 0;
}

.hero-copy.is-visible > :nth-child(2),
.section-heading.is-visible > :nth-child(2),
.story-row.is-visible .story-copy > :nth-child(2),
.feature-card.is-visible > :nth-child(2),
.privacy-shell.is-visible .privacy-copy > :nth-child(2),
.download-shell.is-visible > :nth-child(2) { transition-delay: 70ms; }

.hero-copy.is-visible > :nth-child(3),
.section-heading.is-visible > :nth-child(3),
.story-row.is-visible .story-copy > :nth-child(3),
.feature-card.is-visible > :nth-child(3),
.privacy-shell.is-visible .privacy-copy > :nth-child(3),
.download-shell.is-visible > :nth-child(3) { transition-delay: 140ms; }

.hero-copy.is-visible > :nth-child(4),
.story-row.is-visible .story-copy > :nth-child(4),
.feature-card.is-visible > :nth-child(4),
.download-shell.is-visible > :nth-child(4) { transition-delay: 210ms; }

.hero-copy.is-visible > :nth-child(5) { transition-delay: 280ms; }

.privacy-shell.is-visible .privacy-list > :nth-child(2) { transition-delay: 70ms; }
.privacy-shell.is-visible .privacy-list > :nth-child(3) { transition-delay: 140ms; }
.privacy-shell.is-visible .privacy-list > :nth-child(4) { transition-delay: 210ms; }
.privacy-shell.is-visible .privacy-list > :nth-child(5) { transition-delay: 280ms; }

@media (max-width: 1060px) {
  .source-strip-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 24px;
    padding-block: 30px;
  }

  .source-list {
    width: 100%;
    grid-template-columns: repeat(4, 1fr);
  }

  .story-row,
  .story-row-reverse {
    grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
    gap: 46px;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  :root { --header: 64px; }

  .section-shell,
  .header-inner,
  .hero-inner {
    width: min(calc(100% - 32px), var(--max));
  }

  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: var(--header) 0 auto;
    display: grid;
    gap: 0;
    padding: 10px 16px 24px;
    border-bottom: 1px solid var(--line);
    background: rgba(5, 7, 11, 0.96);
    backdrop-filter: blur(22px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
  }

  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 16px 8px;
    border-bottom: 1px solid var(--line);
    font-size: 0.88rem;
  }

  .site-nav a::after { display: none; }
  .header-actions { gap: 8px; }
  .header-download { display: none; }

  .hero {
    min-height: 820px;
    align-items: flex-end;
  }

  .hero-copy {
    width: 100%;
    padding: 150px 0 105px;
  }

  .hero-backdrop img {
    object-position: 62% center;
    opacity: 0.54;
  }

  .hero-backdrop.poster-wall-ready > img {
    opacity: 0.06;
  }

  .hero-backdrop-shade {
    background:
      linear-gradient(0deg, rgba(4, 7, 11, 0.99) 0%, rgba(4, 7, 11, 0.8) 49%, rgba(4, 7, 11, 0.26) 100%),
      linear-gradient(90deg, rgba(4, 7, 11, 0.4), transparent);
  }

  .hero-hud-side { display: none; }
  .hero-hud-top span:last-child { display: none; }

  .story-row,
  .story-row-reverse {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .story-row-reverse .story-visual,
  .story-row-reverse .story-copy {
    order: initial;
  }

  .story-copy {
    padding-inline: 8px;
  }

  .section-heading-split {
    align-items: flex-start;
    flex-direction: column;
    gap: 0;
  }

  .section-heading-split > p {
    width: 100%;
  }

  .privacy-shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .brand-en { display: none; }
  .brand-logo {
    width: 32px;
    height: 32px;
    flex-basis: 32px;
  }
  .header-inner { gap: 8px; }

  .hero h1 {
    font-size: clamp(3.2rem, 16vw, 5rem);
  }

  .hero-lead {
    font-size: 0.9rem;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-meta {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

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

  .section {
    padding-block: 92px;
  }

  .section-heading {
    margin-bottom: 52px;
  }

  .section-heading h2,
  .privacy-copy h2 {
    font-size: clamp(2.45rem, 12vw, 3.7rem);
  }

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

  .gallery-item-wide {
    grid-column: auto;
  }

  .feature-card {
    min-height: 0;
    padding: 28px;
  }

  .privacy-shell {
    padding: 38px 24px;
  }

  .project-stats {
    grid-template-columns: 1fr;
  }

  .project-stats > * {
    min-height: 76px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .project-stats > *:last-child {
    border-bottom: 0;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-block: 26px;
  }
}

@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;
  }
  .reveal {
    opacity: 1;
    translate: none;
  }
  .lyric-char,
  .hero-copy > *,
  .section-heading > *,
  .story-row .story-copy > *,
  .feature-card > *,
  .privacy-shell .privacy-copy > *,
  .privacy-shell .privacy-list > *,
  .download-shell > * {
    opacity: 1;
    transform: none;
    translate: none;
  }
  .story-visual,
  .gallery-item {
    transform: none;
  }
  .hero-poster-column {
    animation: none;
  }
}