:root {
  --ink: #03050a;
  --panel: rgba(4, 8, 15, 0.72);
  --line: rgba(255, 255, 255, 0.16);
  --cyan: #28dcff;
  --red: #ff2747;
  --white: #f6fbff;
  --muted: #9aa8b8;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--white);
  font-family: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-shell {
  min-height: 100vh;
  background: var(--ink);
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 20px clamp(22px, 4vw, 72px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(2, 5, 10, 0.64);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand img {
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 12px;
  box-shadow: 0 0 24px rgba(40, 220, 255, 0.24);
}

.brand span {
  display: grid;
  gap: 2px;
}

.brand strong {
  font-size: 15px;
  letter-spacing: 0.16em;
}

.brand small,
.panel-index {
  color: #91a0b2;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.18em;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2vw, 32px);
  font-size: 13px;
}

.site-header nav > a:not(.nav-contact) {
  color: #b7c0ca;
}

.nav-contact {
  padding: 10px 16px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(2, 6, 12, 0.4);
  letter-spacing: 0.08em;
}

.nav-github {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  gap: 7px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, 0.19);
  background: rgba(2, 6, 12, 0.38);
  color: #dce9f5;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.nav-github svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  background-image:
    linear-gradient(90deg, rgba(1, 4, 9, 0.94) 0%, rgba(1, 4, 9, 0.64) 37%, rgba(1, 4, 9, 0.12) 68%, rgba(1, 4, 9, 0.42) 100%),
    linear-gradient(0deg, rgba(1, 4, 9, 0.86), transparent 42%),
    url('./media/hero-16x9.png');
  background-position: center;
  background-size: cover;
}

.hero::after {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: repeating-linear-gradient(
    0deg,
    transparent 0,
    transparent 3px,
    rgba(255, 255, 255, 0.016) 4px
  );
  content: '';
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.14;
  background-image:
    linear-gradient(rgba(39, 218, 255, 0.26) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 42, 70, 0.22) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, transparent 20%, #000 100%);
  transform: perspective(420px) rotateX(64deg) scale(1.3) translateY(48%);
  transform-origin: bottom;
}

.hero-glow {
  position: absolute;
  width: 36vw;
  aspect-ratio: 1;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.18;
}

.hero-glow-blue {
  bottom: -22vw;
  left: 18vw;
  background: var(--cyan);
}

.hero-glow-red {
  top: 8vh;
  right: -20vw;
  background: var(--red);
}

.hero-content {
  position: relative;
  z-index: 3;
  display: flex;
  min-height: 100svh;
  width: min(640px, 86vw);
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 110px 0 156px clamp(24px, 7vw, 132px);
}

.hero-icon {
  width: clamp(76px, 7.5vw, 116px);
  aspect-ratio: 1;
  margin-bottom: 22px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 25%;
  box-shadow:
    -12px 8px 38px rgba(40, 220, 255, 0.22),
    12px 8px 38px rgba(255, 39, 71, 0.2);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: #b8c3cf;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  letter-spacing: 0.13em;
}

.eyebrow span {
  width: 24px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--red));
  box-shadow: 0 0 12px var(--cyan);
}

.hero h1 {
  margin: 0;
  font-size: clamp(50px, 6.2vw, 108px);
  font-style: italic;
  font-weight: 950;
  letter-spacing: -0.075em;
  line-height: 0.88;
  text-transform: uppercase;
  text-shadow: 0 10px 44px rgba(0, 0, 0, 0.58);
}

.hero h1 span {
  display: block;
}

.hero h1 span:first-child {
  color: #effcff;
}

.hero h1 span:last-child {
  margin-top: 8px;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(255, 248, 250, 0.92);
}

.hero-lead {
  margin: 26px 0 0;
  color: #c0cad4;
  font-size: clamp(14px, 1.1vw, 18px);
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.08em;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.button:hover,
.button:focus-visible,
.nav-contact:hover,
.nav-contact:focus-visible,
.nav-github:hover,
.nav-github:focus-visible {
  border-color: rgba(255, 255, 255, 0.65);
  outline: none;
  transform: translateY(-2px);
}

.button-primary {
  min-width: 190px;
  justify-content: space-between;
  border-color: rgba(40, 220, 255, 0.75);
  background: linear-gradient(110deg, rgba(18, 184, 223, 0.9), rgba(0, 96, 127, 0.84));
  box-shadow: 0 0 30px rgba(40, 220, 255, 0.18);
}

.button-primary b {
  font-size: 20px;
}

.button-ghost {
  background: rgba(5, 10, 18, 0.55);
  backdrop-filter: blur(12px);
}

.button-pc-download {
  min-width: 176px;
  justify-content: space-between;
  border-color: rgba(255, 39, 71, 0.72);
  background: linear-gradient(110deg, rgba(125, 18, 53, 0.86), rgba(55, 8, 21, 0.78));
  box-shadow: 0 0 30px rgba(255, 39, 71, 0.14);
}

.button-pc-download b {
  font-size: 20px;
}

.contact-panel,
.qr-panel {
  position: absolute;
  z-index: 4;
  bottom: clamp(24px, 4vw, 64px);
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(18px);
}

.hero-qr {
  scroll-margin-top: 100px;
}

.contact-panel {
  left: clamp(24px, 4vw, 72px);
  min-width: 240px;
  padding: 18px 20px;
}

.contact-panel p {
  margin: 10px 0 4px;
  color: #aab5c1;
  font-size: 12px;
}

.contact-panel a {
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
}

.qr-panel {
  right: clamp(24px, 4vw, 72px);
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px;
}

.qr-panel img {
  width: 104px;
  height: 104px;
  background: #fff;
}

.qr-copy {
  display: grid;
  gap: 5px;
  padding-left: 8px;
}

.qr-copy strong {
  margin-top: 7px;
  font-size: 18px;
}

.qr-copy small {
  color: #aab5c1;
  font-size: 11px;
}

.scroll-cue {
  position: absolute;
  z-index: 4;
  bottom: 42px;
  left: 50%;
  display: grid;
  justify-items: center;
  gap: 9px;
  color: #8793a0;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 8px;
  letter-spacing: 0.2em;
  transform: translateX(-50%);
}

.scroll-cue i {
  display: block;
  width: 1px;
  height: 34px;
  background: linear-gradient(var(--cyan), transparent);
  animation: scroll-pulse 1.8s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.25; transform: scaleY(0.45); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
}

.section-shell {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: clamp(92px, 10vw, 152px) 0;
}

.section-kicker {
  margin: 0 0 20px;
  color: #79899c;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
}

.section-kicker::before {
  display: inline-block;
  width: 28px;
  height: 1px;
  margin: 0 12px 3px 0;
  background: linear-gradient(90deg, var(--cyan), var(--red));
  box-shadow: 0 0 10px rgba(40, 220, 255, 0.7);
  content: '';
}

.section-heading h2,
.film-copy h2,
.final-cta h2 {
  max-width: 920px;
  margin: 0;
  font-size: clamp(42px, 5.4vw, 82px);
  font-weight: 900;
  letter-spacing: -0.065em;
  line-height: 1.02;
}

.section-heading h2 em,
.feature-heading em {
  color: transparent;
  font-style: normal;
  -webkit-text-stroke: 1px rgba(239, 249, 255, 0.7);
}

.signal-strip {
  position: relative;
  z-index: 5;
  display: flex;
  min-height: 66px;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 2vw, 34px);
  overflow: hidden;
  border-top: 1px solid rgba(40, 220, 255, 0.18);
  border-bottom: 1px solid rgba(255, 39, 71, 0.18);
  background: #060911;
  color: #778597;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.18em;
  white-space: nowrap;
}

.signal-strip i {
  width: 4px;
  height: 4px;
  background: var(--red);
  box-shadow: 0 0 10px var(--red);
  transform: rotate(45deg);
}

.story {
  position: relative;
}

.story::before {
  position: absolute;
  top: 4%;
  left: -15vw;
  width: 42vw;
  aspect-ratio: 1;
  border: 1px solid rgba(40, 220, 255, 0.07);
  border-radius: 50%;
  box-shadow: 0 0 120px rgba(40, 220, 255, 0.055) inset;
  content: '';
  pointer-events: none;
}

.story-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.92fr) minmax(360px, 1.08fr);
  gap: clamp(48px, 8vw, 108px);
  align-items: center;
  margin-top: clamp(56px, 7vw, 96px);
}

.story-poster {
  position: relative;
  margin: 0;
}

.story-poster::before,
.story-poster::after {
  position: absolute;
  z-index: -1;
  content: '';
}

.story-poster::before {
  inset: -12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.story-poster::after {
  right: -28px;
  bottom: -28px;
  width: 54%;
  height: 54%;
  border-right: 1px solid rgba(255, 39, 71, 0.5);
  border-bottom: 1px solid rgba(255, 39, 71, 0.5);
}

.story-poster > img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.07);
}

.story-poster figcaption {
  position: absolute;
  right: 18px;
  bottom: 18px;
  left: 18px;
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(2, 5, 10, 0.78);
  backdrop-filter: blur(12px);
}

.story-poster figcaption span,
.film-meta {
  color: #8190a2;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 8px;
  letter-spacing: 0.18em;
}

.story-poster figcaption b {
  font-size: 15px;
  letter-spacing: 0.04em;
}

.story-copy > p {
  margin: 0 0 22px;
  color: #9fabb8;
  font-size: clamp(15px, 1.25vw, 18px);
  line-height: 1.9;
}

.story-copy .story-intro {
  color: #edf5fb;
  font-size: clamp(19px, 1.7vw, 26px);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.65;
}

.timing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 46px 0 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.timing-grid > div {
  display: grid;
  gap: 8px;
  padding: 22px 18px;
  background: #070b12;
}

.timing-grid dt {
  color: #f7fbff;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: clamp(24px, 2.5vw, 36px);
  font-weight: 800;
}

.timing-grid dt span {
  margin-left: 2px;
  color: var(--cyan);
  font-size: 12px;
}

.timing-grid dd {
  margin: 0;
  color: #7f8d9e;
  font-size: 11px;
}

.film-section {
  position: relative;
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background:
    radial-gradient(circle at 90% 52%, rgba(255, 39, 71, 0.11), transparent 34%),
    radial-gradient(circle at 10% 20%, rgba(40, 220, 255, 0.08), transparent 30%),
    #050811;
}

.film-shell {
  display: grid;
  grid-template-columns: minmax(260px, 0.68fr) minmax(560px, 1.32fr);
  gap: clamp(40px, 6vw, 86px);
  align-items: center;
}

.film-copy h2 {
  font-size: clamp(36px, 4.1vw, 64px);
}

.film-copy > p:not(.section-kicker) {
  margin: 28px 0 34px;
  color: #9fabb8;
  line-height: 1.85;
}

.video-frame {
  position: relative;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(0, 0, 0, 0.5);
  box-shadow:
    -30px 32px 100px rgba(40, 220, 255, 0.09),
    30px -28px 100px rgba(255, 39, 71, 0.09);
}

.video-frame video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  object-fit: cover;
}

.video-corner {
  position: absolute;
  z-index: 2;
  width: 36px;
  height: 36px;
  pointer-events: none;
}

.video-corner-tl {
  top: -7px;
  left: -7px;
  border-top: 2px solid var(--cyan);
  border-left: 2px solid var(--cyan);
}

.video-corner-br {
  right: -7px;
  bottom: -7px;
  border-right: 2px solid var(--red);
  border-bottom: 2px solid var(--red);
}

.video-label {
  position: absolute;
  top: 26px;
  right: 26px;
  left: 26px;
  display: flex;
  justify-content: space-between;
  color: rgba(255, 255, 255, 0.68);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 8px;
  letter-spacing: 0.16em;
  pointer-events: none;
}

.video-label b {
  color: #ff4963;
  font-weight: 700;
}

.loop-heading {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 72px;
  align-items: end;
}

.loop-heading > p {
  margin: 0 0 8px;
  color: #8d9aab;
  line-height: 1.8;
}

.phase-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 72px 0 0;
  padding: 1px;
  background: rgba(255, 255, 255, 0.12);
  list-style: none;
}

.phase-card {
  position: relative;
  min-height: 430px;
  overflow: hidden;
  padding: 24px;
  background: #060a11;
}

.phase-card::before {
  position: absolute;
  top: -90px;
  left: 50%;
  width: 210px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: currentColor;
  content: '';
  filter: blur(80px);
  opacity: 0.1;
  transform: translateX(-50%);
}

.phase-cyan { color: var(--cyan); }
.phase-violet { color: #7864ff; }
.phase-white { color: #eef8ff; }
.phase-red { color: var(--red); }

.phase-top {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: "SFMono-Regular", Consolas, monospace;
}

.phase-top span {
  font-size: 13px;
  font-weight: 800;
}

.phase-top small {
  color: #697687;
  font-size: 8px;
  letter-spacing: 0.12em;
}

.phase-pulse {
  position: relative;
  width: 112px;
  aspect-ratio: 1;
  margin: 52px auto 38px;
  border: 1px solid currentColor;
  border-radius: 50%;
  opacity: 0.85;
}

.phase-pulse::before,
.phase-pulse::after,
.phase-pulse i {
  position: absolute;
  inset: 50%;
  border-radius: 50%;
  content: '';
  transform: translate(-50%, -50%);
}

.phase-pulse::before {
  width: 72%;
  height: 72%;
  border: 1px dashed currentColor;
}

.phase-pulse::after {
  width: 10px;
  height: 10px;
  background: currentColor;
  box-shadow: 0 0 24px currentColor;
}

.phase-pulse i {
  width: 132%;
  height: 1px;
  background: linear-gradient(90deg, transparent, currentColor, transparent);
}

.phase-card > p {
  margin: 0 0 7px;
  color: currentColor;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
}

.phase-card h3 {
  margin: 0;
  color: #f4f9fc;
  font-size: 22px;
}

.phase-line {
  width: 100%;
  height: 1px;
  margin: 20px 0;
  background: linear-gradient(90deg, currentColor, transparent);
  opacity: 0.45;
}

.phase-description {
  display: block;
  color: #8e9baa;
  font-size: 12px;
  line-height: 1.75;
}

.feature-section {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: #05080e;
}

.feature-heading {
  max-width: 900px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 68px;
}

.feature-card {
  position: relative;
  display: flex;
  min-height: 340px;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.feature-card::after {
  position: absolute;
  right: -80px;
  bottom: -110px;
  width: 240px;
  aspect-ratio: 1;
  border: 1px solid currentColor;
  border-radius: 50%;
  box-shadow: 0 0 60px currentColor inset;
  content: '';
  opacity: 0.12;
}

.feature-card > span {
  color: currentColor;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.18em;
}

.feature-card h3 {
  margin: 0 0 16px;
  color: #f3f8fc;
  font-size: clamp(24px, 2.4vw, 34px);
  letter-spacing: -0.04em;
}

.feature-card p {
  max-width: 330px;
  margin: 0;
  color: #9aa7b7;
  font-size: 13px;
  line-height: 1.85;
}

.feature-cyan {
  color: var(--cyan);
  background: linear-gradient(145deg, rgba(40, 220, 255, 0.09), #070b12 70%);
}

.feature-dark {
  color: #8f77ff;
  background: linear-gradient(145deg, rgba(112, 82, 255, 0.08), #070b12 70%);
}

.feature-red {
  color: var(--red);
  background: linear-gradient(145deg, rgba(255, 39, 71, 0.08), #070b12 70%);
}

.challenge-bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 38px;
  align-items: center;
  margin-top: 64px;
  padding: 34px 38px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.025);
}

.challenge-bar > div {
  display: grid;
  gap: 8px;
}

.challenge-bar span {
  color: #718095;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 8px;
  letter-spacing: 0.17em;
}

.challenge-bar strong {
  font-size: 25px;
}

.challenge-bar p {
  margin: 0;
  color: #8d9aaa;
  font-size: 12px;
}

.challenge-bar > i {
  color: var(--cyan);
  font-size: 32px;
  font-style: normal;
  text-shadow: 0 0 16px var(--cyan);
}

.final-cta {
  position: relative;
  display: grid;
  min-height: min(900px, 100svh);
  place-items: center;
  overflow: hidden;
  padding: 110px 24px;
  text-align: center;
  background-image:
    radial-gradient(circle at center, rgba(0, 0, 0, 0.16), rgba(2, 4, 9, 0.9) 64%, #020409 100%),
    url('./media/hero-16x9.png');
  background-position: center;
  background-size: cover;
}

.final-cta::before {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0, 188, 235, 0.08), transparent 45%, rgba(255, 39, 71, 0.08));
  content: '';
}

.cta-rings,
.cta-rings i {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.cta-rings {
  width: min(78vw, 780px);
  aspect-ratio: 1;
  border-color: rgba(40, 220, 255, 0.2);
  box-shadow: 0 0 100px rgba(40, 220, 255, 0.08) inset;
}

.cta-rings i:nth-child(1) { width: 76%; height: 76%; border-style: dashed; }
.cta-rings i:nth-child(2) { width: 50%; height: 50%; border-color: rgba(255, 39, 71, 0.28); }
.cta-rings i:nth-child(3) { width: 22%; height: 22%; border-color: rgba(255, 255, 255, 0.28); }

.cta-content {
  position: relative;
  z-index: 2;
  display: flex;
  max-width: 780px;
  flex-direction: column;
  align-items: center;
}

.cta-icon {
  width: 84px;
  aspect-ratio: 1;
  margin-bottom: 26px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 24%;
  box-shadow:
    -14px 0 38px rgba(40, 220, 255, 0.2),
    14px 0 38px rgba(255, 39, 71, 0.2);
}

.final-cta h2 {
  font-size: clamp(44px, 6vw, 88px);
}

.cta-content > p:not(.section-kicker) {
  margin: 24px 0 32px;
  color: #a5b1be;
}

.cta-download-grid {
  display: grid;
  width: min(100%, 780px);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.cta-card {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 22px;
  padding: 16px 22px 16px 16px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(3, 7, 13, 0.82);
  text-align: left;
  backdrop-filter: blur(18px);
}

.cta-card > img {
  width: 126px;
  height: 126px;
  background: #fff;
}

.cta-card > div {
  display: grid;
  gap: 7px;
}

.cta-card span,
.cta-card small {
  color: #7f8da0;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 8px;
  letter-spacing: 0.13em;
}

.cta-card strong {
  font-size: 21px;
}

.cta-card-pc {
  border-color: rgba(255, 39, 71, 0.5);
  background:
    linear-gradient(130deg, rgba(255, 39, 71, 0.11), rgba(3, 7, 13, 0.9) 55%),
    rgba(3, 7, 13, 0.82);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.cta-card-pc:hover,
.cta-card-pc:focus-visible {
  border-color: rgba(255, 39, 71, 0.95);
  outline: none;
  transform: translateY(-3px);
  box-shadow: 0 18px 44px rgba(255, 39, 71, 0.15);
}

.cta-card-pc b {
  margin-top: 2px;
  color: #ffdbe1;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.cta-card-pc b i {
  color: var(--red);
  font-size: 14px;
  font-style: normal;
}

.cta-mail {
  margin-top: 24px;
  color: #93a0af;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
}

footer {
  display: flex;
  min-height: 120px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px clamp(24px, 4vw, 72px);
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  color: #6e7c8e;
  font-size: 10px;
}

.footer-brand img {
  width: 36px;
  height: 36px;
}

footer > a:last-child {
  font-family: "SFMono-Regular", Consolas, monospace;
}

@media (max-width: 900px) {
  .hero {
    background-image:
      linear-gradient(0deg, rgba(1, 4, 9, 0.98) 0%, rgba(1, 4, 9, 0.35) 54%, rgba(1, 4, 9, 0.6) 100%),
      url('./media/cover-square.jpg');
    background-position: center top;
  }

  .hero-content {
    width: 100%;
    justify-content: flex-end;
    padding: 112px 24px 265px;
  }

  .hero-icon {
    display: none;
  }

  .hero h1 {
    font-size: clamp(48px, 13vw, 76px);
  }

  .contact-panel {
    display: none;
  }

  .qr-panel {
    right: 24px;
    bottom: 28px;
    left: 24px;
    justify-content: space-between;
  }

  .scroll-cue {
    display: none;
  }

  .story-layout,
  .film-shell,
  .loop-heading {
    grid-template-columns: 1fr;
  }

  .story-layout {
    gap: 58px;
  }

  .film-shell {
    gap: 52px;
  }

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

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

  .feature-card {
    min-height: 260px;
  }
}

@media (max-width: 760px) {
  .cta-download-grid {
    width: min(100%, 470px);
    grid-template-columns: 1fr;
  }

  .final-cta {
    min-height: 980px;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding: 14px 16px;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .brand small,
  .site-header nav > a:not(.nav-contact):not(.nav-github),
  .hero-qr {
    display: none;
  }

  .nav-github {
    min-width: 38px;
    justify-content: center;
    padding: 0 9px;
  }

  .nav-github span {
    display: none;
  }

  .nav-contact {
    padding: 9px 12px;
    font-size: 11px;
  }

  .hero-content {
    padding-right: 18px;
    padding-bottom: 250px;
    padding-left: 18px;
  }

  .eyebrow {
    font-size: 9px;
  }

  .hero-lead br {
    display: none;
  }

  .hero-actions {
    width: 100%;
  }

  .button {
    flex: 1;
    min-width: 148px;
    padding: 0 14px;
    font-size: 11px;
  }

  .qr-panel {
    right: 16px;
    bottom: 16px;
    left: 16px;
  }

  .qr-panel img {
    width: 92px;
    height: 92px;
  }

  .section-shell {
    width: min(100% - 32px, 1180px);
    padding: 78px 0;
  }

  .signal-strip {
    justify-content: flex-start;
    padding: 0 20px;
  }

  .story-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .story-poster::after {
    right: -10px;
    bottom: -10px;
  }

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

  .timing-grid > div {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .video-frame {
    padding: 6px;
  }

  .video-label {
    top: 16px;
    right: 16px;
    left: 16px;
  }

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

  .phase-card {
    min-height: 390px;
  }

  .challenge-bar {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 26px;
  }

  .challenge-bar > i {
    transform: rotate(90deg);
  }

  .final-cta {
    min-height: 1020px;
    padding: 92px 18px;
    background-image:
      radial-gradient(circle at center, rgba(0, 0, 0, 0.12), rgba(2, 4, 9, 0.94) 64%, #020409 100%),
      url('./media/cover-square.jpg');
  }

  .cta-card {
    gap: 14px;
    padding: 12px 14px 12px 12px;
  }

  .cta-card > img {
    width: 104px;
    height: 104px;
  }

  .cta-card strong {
    font-size: 17px;
  }

  footer {
    flex-direction: column;
    justify-content: center;
    padding: 38px 20px;
    text-align: center;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}