:root {
  --bg-0: #04070d;
  --bg-1: #08111c;
  --bg-2: #101a2a;
  --panel: rgba(8, 14, 24, 0.72);
  --panel-strong: rgba(10, 18, 30, 0.88);
  --line: rgba(115, 242, 255, 0.26);
  --line-strong: rgba(115, 242, 255, 0.62);
  --cyan: #73f2ff;
  --cyan-soft: rgba(115, 242, 255, 0.18);
  --magenta: #ff4c97;
  --magenta-soft: rgba(255, 76, 151, 0.14);
  --amber: #ffc44d;
  --amber-soft: rgba(255, 196, 77, 0.16);
  --lime: #a3ff8f;
  --lime-soft: rgba(163, 255, 143, 0.14);
  --text: #eef5ff;
  --muted: #9faeca;
  --muted-strong: #c6d3ec;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --title-font: "Orbitron", "Noto Sans SC", sans-serif;
  --body-font: "Chakra Petch", "Noto Sans SC", sans-serif;
  --cn-title-font: "ZCOOL QingKe HuangYou", "Noto Sans SC", sans-serif;
  --message-cn-font: "SJsuqian", var(--cn-title-font);
  --sans-cn-font: "Source Han Sans SC", "Source Han Sans CN", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono-font: "IBM Plex Mono", "Cascadia Mono", monospace;
  --section-width: min(1220px, calc(100% - 32px));
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--body-font);
  color: var(--text);
  background:
    radial-gradient(circle at 15% 15%, rgba(115, 242, 255, 0.1), transparent 24%),
    radial-gradient(circle at 82% 20%, rgba(255, 76, 151, 0.11), transparent 20%),
    radial-gradient(circle at 72% 82%, rgba(255, 196, 77, 0.1), transparent 20%),
    linear-gradient(145deg, var(--bg-0), var(--bg-1) 42%, var(--bg-2));
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  background:
    linear-gradient(rgba(115, 242, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(115, 242, 255, 0.08) 1px, transparent 1px);
  background-size: 78px 78px;
  mask-image: radial-gradient(circle at center, black 20%, transparent 88%);
  opacity: 0.28;
}

body::after {
  background:
    repeating-linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.06) 0,
      rgba(255, 255, 255, 0.06) 1px,
      transparent 1px,
      transparent 4px
    );
  opacity: 0.11;
  mix-blend-mode: screen;
}

.app-shell {
  position: relative;
  isolation: isolate;
}

.app-shell::before,
.app-shell::after {
  content: "";
  position: fixed;
  inset: -18%;
  pointer-events: none;
  z-index: -1;
}

.app-shell::before {
  background:
    radial-gradient(circle at 18% 28%, rgba(115, 242, 255, 0.17), transparent 22%),
    radial-gradient(circle at 84% 22%, rgba(255, 76, 151, 0.14), transparent 18%),
    radial-gradient(circle at 65% 88%, rgba(255, 196, 77, 0.12), transparent 24%);
  filter: blur(28px);
  animation: mesh-drift 18s ease-in-out infinite alternate;
}

.app-shell::after {
  background:
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.03), transparent 60%),
    radial-gradient(circle at 18% 68%, rgba(163, 255, 143, 0.07), transparent 22%);
  filter: blur(18px);
  animation: glow-pulse 10s ease-in-out infinite;
}

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

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

button,
input,
textarea {
  font: inherit;
}

.topbar {
  position: sticky;
  top: 12px;
  z-index: 20;
  width: var(--section-width);
  margin: 0 auto;
  padding: 22px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px 32px;
}

.topbar::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(6, 10, 18, 0.56);
  border: 1px solid rgba(115, 242, 255, 0.22);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.02) inset, var(--shadow);
  backdrop-filter: blur(18px);
  clip-path: polygon(0 18px, 18px 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 18px));
  z-index: -1;
}

.topbar__group,
.topbar__nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.topbar__group {
  gap: 10px 16px;
}

.topbar__code,
.topbar__nav a {
  font-family: var(--mono-font);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.topbar__code {
  color: var(--cyan);
}

.topbar__name {
  font-family: var(--title-font);
  font-size: 1.02rem;
  letter-spacing: 0.08em;
}

.topbar__nav {
  gap: 10px 18px;
}

.topbar__nav a {
  color: var(--muted-strong);
  position: relative;
  transition: color 0.2s ease;
}

.topbar__nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}

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

.topbar__nav a:hover::after,
.topbar__nav a:focus-visible::after {
  transform: scaleX(1);
}

main {
  display: grid;
  gap: clamp(70px, 10vw, 120px);
  padding-bottom: 80px;
}

.hero,
.section {
  width: var(--section-width);
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  align-items: center;
  gap: clamp(36px, 7vw, 84px);
  padding: clamp(36px, 7vw, 88px) 0 20px;
}

.eyebrow,
.section__eyebrow,
.panel__tag,
.feature-card__chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--mono-font);
  font-size: 0.82rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before,
.section__eyebrow::before,
.panel__tag::before {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.hero__title {
  position: relative;
  margin: 16px 0 18px;
  font-family: var(--title-font);
  font-size: clamp(3.4rem, 8vw, 7.5rem);
  line-height: 0.92;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #eef2f6;
  text-shadow:
    0 0 16px rgba(208, 220, 232, 0.1),
    0.03em 0 0 rgba(176, 198, 214, 0.38),
    -0.03em 0 0 rgba(200, 188, 198, 0.32);
}

.glitch {
  animation: title-flicker 4.8s steps(1, end) infinite;
}

.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  pointer-events: none;
  white-space: pre-line;
}

.glitch::before {
  transform: translate(2px, -1px);
  color: rgba(181, 205, 219, 0.48);
  clip-path: inset(0 0 62% 0);
  animation: glitch-top 3.2s steps(2, end) infinite;
}

.glitch::after {
  transform: translate(-2px, 1px);
  color: rgba(204, 190, 199, 0.42);
  clip-path: inset(76% 0 0 0);
  animation: glitch-bottom 2.8s steps(2, end) infinite;
}

.hero__subtitle {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-family: var(--cn-title-font);
  font-size: clamp(1.65rem, 3vw, 2.55rem);
  letter-spacing: 0.12em;
  color: #f4f0db;
  text-shadow:
    0 0 14px rgba(255, 196, 77, 0.16),
    0 0 30px rgba(115, 242, 255, 0.08);
}

.hero__cursor {
  width: 14px;
  height: 1.15em;
  background: linear-gradient(180deg, var(--cyan), var(--magenta));
  box-shadow: 0 0 14px rgba(115, 242, 255, 0.4);
  animation: blink 1.05s steps(1, end) infinite;
}

.hero__tagline {
  max-width: 42rem;
  margin: 22px 0 0;
  font-size: clamp(1.05rem, 1.6vw, 1.26rem);
  line-height: 1.8;
  color: var(--muted);
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.meta-pill {
  padding: 11px 14px;
  border: 1px solid rgba(115, 242, 255, 0.2);
  border-radius: 999px;
  background: rgba(10, 18, 30, 0.55);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
  font-family: var(--mono-font);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--muted-strong);
}

.hero__stage {
  perspective: 1200px;
}

.hero__frame,
.panel,
.feature-card {
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 18px, 18px 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 24px 100%, 0 calc(100% - 18px));
}

.hero__frame {
  min-height: 560px;
  display: grid;
  align-content: space-between;
  gap: 28px;
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid rgba(115, 242, 255, 0.28);
  background:
    linear-gradient(145deg, rgba(8, 15, 26, 0.9), rgba(10, 18, 31, 0.62)),
    linear-gradient(180deg, rgba(115, 242, 255, 0.04), transparent 40%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.03) inset,
    0 0 40px rgba(115, 242, 255, 0.09),
    var(--shadow);
  transform: rotateX(calc(var(--tilt-y, 0) * 0.8deg)) rotateY(calc(var(--tilt-x, 0) * -0.8deg));
  transition: transform 0.18s ease-out;
}

.hero__frame::before,
.panel::before,
.feature-card::before {
  content: "";
  position: absolute;
  inset: 1px;
  clip-path: inherit;
  pointer-events: none;
}

.hero__frame::before {
  background:
    radial-gradient(circle at var(--pointer-x, 50%) var(--pointer-y, 50%), rgba(115, 242, 255, 0.16), transparent 24%),
    linear-gradient(130deg, rgba(255, 255, 255, 0.04), transparent 25%, rgba(255, 255, 255, 0.02) 52%, transparent 78%);
}

.hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(115, 242, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(115, 242, 255, 0.12) 1px, transparent 1px);
  background-size: 52px 52px;
  opacity: 0.12;
  pointer-events: none;
}

.hero__badge,
.hero__readout,
.hero__signal,
.panel > *,
.feature-card > * {
  position: relative;
  z-index: 1;
}

.hero__badge {
  display: grid;
  gap: 16px;
}

.hero__badge-label {
  font-family: var(--mono-font);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
}

.hero__emblem {
  width: min(100%, 390px);
  margin-inline: auto;
  filter:
    brightness(0) invert(1)
    drop-shadow(0 0 18px rgba(115, 242, 255, 0.28))
    drop-shadow(0 0 34px rgba(255, 76, 151, 0.12));
  opacity: 0.92;
}

.hero__readout {
  display: grid;
  gap: 12px;
  padding: 16px 18px;
  background: rgba(5, 11, 18, 0.54);
  border: 1px solid rgba(115, 242, 255, 0.16);
}

.readout-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(115, 242, 255, 0.12);
  font-family: var(--mono-font);
  font-size: 0.84rem;
  letter-spacing: 0.08em;
}

.readout-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.readout-row span {
  color: var(--muted);
}

.readout-row strong {
  color: var(--text);
  font-weight: 600;
}

.hero__signal {
  display: grid;
  gap: 8px;
  justify-items: end;
}

.signal-bar {
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta), var(--amber));
  box-shadow: 0 0 18px rgba(115, 242, 255, 0.2);
  animation: signal-shift 4.8s ease-in-out infinite;
}

.signal-bar--lg {
  width: 78%;
}

.signal-bar--md {
  width: 58%;
  animation-delay: -1.1s;
}

.signal-bar--sm {
  width: 42%;
  animation-delay: -2.2s;
}

.section {
  display: grid;
  gap: 28px;
}

.section__header {
  max-width: 58rem;
}

.section__title {
  margin: 12px 0 0;
  font-family: var(--title-font);
  font-size: clamp(1.85rem, 3vw, 3rem);
  line-height: 1.15;
  letter-spacing: 0.03em;
}

.section__lead {
  max-width: 44rem;
  margin: 16px 0 0;
  color: var(--muted);
  line-height: 1.8;
  font-size: 1.02rem;
}

.message-wall__layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 22px;
  align-items: start;
}

.panel {
  padding: 22px;
  border: 1px solid rgba(115, 242, 255, 0.22);
  background:
    linear-gradient(160deg, rgba(8, 14, 24, 0.9), rgba(10, 18, 31, 0.66)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 42%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.02) inset,
    0 0 30px rgba(115, 242, 255, 0.06),
    var(--shadow);
}

.panel::before {
  background:
    linear-gradient(135deg, rgba(115, 242, 255, 0.08), transparent 28%, rgba(255, 76, 151, 0.05) 72%, transparent);
  opacity: 0.9;
}

.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.panel--feed {
  display: grid;
  align-content: start;
  align-self: start;
}

.panel--form {
  align-self: start;
}

.panel__hint {
  color: var(--muted);
  font-family: var(--mono-font);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.message-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  padding: 12px 14px;
  border: 1px solid rgba(115, 242, 255, 0.14);
  background: rgba(5, 11, 18, 0.48);
  font-family: var(--mono-font);
}

.message-status__count,
.message-status__state {
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.message-status__count {
  color: var(--cyan);
}

.message-status__state {
  color: var(--muted-strong);
}

.message-list {
  --message-feed-padding: 14px;
  --message-slot-gap: 14px;
  --message-card-height: 142px;
  --message-slot-count: 4;
  position: relative;
  display: block;
  padding: var(--message-feed-padding);
  overflow: hidden;
  min-height: calc(
    (var(--message-slot-count) * var(--message-card-height)) +
    ((var(--message-slot-count) - 1) * var(--message-slot-gap)) +
    (var(--message-feed-padding) * 2)
  );
  height: calc(
    (var(--message-slot-count) * var(--message-card-height)) +
    ((var(--message-slot-count) - 1) * var(--message-slot-gap)) +
    (var(--message-feed-padding) * 2)
  );
  border: 1px solid rgba(115, 242, 255, 0.14);
  background:
    linear-gradient(180deg, rgba(7, 13, 21, 0.76), rgba(5, 10, 18, 0.92)),
    linear-gradient(90deg, rgba(115, 242, 255, 0.06), transparent 56%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
  contain: layout paint;
}

.message-list::before,
.message-list::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.message-list::before {
  background:
    linear-gradient(rgba(115, 242, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(115, 242, 255, 0.08) 1px, transparent 1px);
  background-size: 36px 36px;
  opacity: 0.08;
}

.message-list::after {
  background:
    linear-gradient(180deg, rgba(5, 10, 18, 0.98) 0%, rgba(5, 10, 18, 0) 10%, rgba(5, 10, 18, 0) 88%, rgba(5, 10, 18, 0.98) 100%),
    repeating-linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.03) 0,
      rgba(255, 255, 255, 0.03) 1px,
      transparent 1px,
      transparent 3px
    );
  opacity: 0.78;
}

.message-track {
  display: grid;
  gap: var(--message-slot-gap);
  transform: translate3d(0, 0, 0);
  will-change: transform;
}

.message-card {
  position: relative;
  min-height: var(--message-card-height);
  padding: 18px 18px 16px;
  border: 1px solid rgba(115, 242, 255, 0.14);
  background:
    linear-gradient(140deg, rgba(11, 19, 31, 0.92), rgba(7, 11, 18, 0.72)),
    linear-gradient(90deg, rgba(115, 242, 255, 0.04), transparent 60%);
  transform: none;
  opacity: 1;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.02),
    0 18px 42px rgba(0, 0, 0, 0.34);
  transition:
    opacity 0.46s ease,
    transform 0.46s ease,
    filter 0.46s ease;
}

.message-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), var(--magenta));
  box-shadow: 0 0 18px rgba(115, 242, 255, 0.22);
}

.message-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0)),
    linear-gradient(180deg, rgba(115, 242, 255, 0.12), rgba(255, 76, 151, 0.05));
  opacity: 0;
  pointer-events: none;
}

.message-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
  font-size: 0.84rem;
  letter-spacing: 0.08em;
}

.message-card__meta strong {
  color: var(--text);
  font-family: var(--message-cn-font);
  font-weight: 400;
  font-size: 1.04rem;
  letter-spacing: 0.06em;
}

.message-card__meta span,
.message-card__stamp {
  color: var(--muted);
  font-family: var(--mono-font);
}

.message-card p {
  margin: 0;
  color: var(--muted-strong);
  font-family: var(--message-cn-font);
  font-size: 0.98rem;
  line-height: 1.72;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}

.message-card__stamp {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--mono-font);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.message-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
}

.message-card__more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 0 12px;
  border: 1px solid rgba(115, 242, 255, 0.18);
  background: rgba(8, 14, 22, 0.64);
  color: var(--cyan);
  font-family: var(--mono-font);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.message-card__more:hover,
.message-card__more:focus-visible {
  border-color: rgba(115, 242, 255, 0.42);
  background: rgba(12, 20, 31, 0.82);
  color: var(--text);
}

.message-modal {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 20px;
}

.message-modal[hidden] {
  display: none;
}

.message-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 12, 0.76);
  backdrop-filter: blur(10px);
}

.message-modal__dialog {
  position: relative;
  z-index: 1;
  width: min(100%, 620px);
  display: grid;
  gap: 16px;
  padding: 22px 22px 18px;
  border: 1px solid rgba(115, 242, 255, 0.18);
  background:
    linear-gradient(155deg, rgba(8, 14, 24, 0.96), rgba(10, 18, 31, 0.84)),
    radial-gradient(circle at top right, rgba(115, 242, 255, 0.08), transparent 30%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.02) inset,
    0 24px 60px rgba(0, 0, 0, 0.42);
  clip-path: polygon(0 16px, 16px 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 16px));
}

.message-modal__close {
  justify-self: end;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid rgba(115, 242, 255, 0.18);
  background: rgba(8, 14, 22, 0.66);
  color: var(--muted-strong);
  font-family: var(--mono-font);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
}

.message-modal__meta {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.message-modal__meta strong {
  color: var(--text);
  font-family: var(--message-cn-font);
  font-size: 1.2rem;
  font-weight: 400;
  letter-spacing: 0.05em;
}

.message-modal__meta span,
.message-modal__stamp {
  color: var(--muted);
  font-family: var(--mono-font);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.message-modal__body {
  margin: 0;
  color: var(--muted-strong);
  font-family: var(--message-cn-font);
  font-size: 1rem;
  line-height: 1.9;
  white-space: pre-wrap;
}

.message-card.is-active {
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.02),
    0 18px 42px rgba(0, 0, 0, 0.34);
}

.message-card.is-highlighted::after {
  animation: card-soft-fade 0.72s ease-out;
}

.message-form {
  display: grid;
  gap: 16px;
  align-content: start;
}

.field {
  display: grid;
  gap: 10px;
}

.field span {
  font-family: var(--mono-font);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-strong);
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid rgba(115, 242, 255, 0.18);
  background: rgba(5, 11, 18, 0.72);
  color: var(--text);
  padding: 14px 16px;
  outline: none;
  clip-path: polygon(0 12px, 12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.field textarea {
  min-height: 180px;
  resize: vertical;
}

.field input::placeholder,
.field textarea::placeholder {
  color: rgba(159, 174, 202, 0.74);
}

.field input:focus,
.field textarea:focus {
  border-color: rgba(115, 242, 255, 0.54);
  box-shadow: 0 0 0 1px rgba(115, 242, 255, 0.14), 0 0 28px rgba(115, 242, 255, 0.08);
  transform: translateY(-1px);
}

.submit-button {
  justify-self: start;
  padding: 14px 22px;
  border: 1px solid rgba(115, 242, 255, 0.26);
  background:
    linear-gradient(90deg, rgba(115, 242, 255, 0.18), rgba(255, 76, 151, 0.16)),
    rgba(7, 12, 20, 0.84);
  color: var(--text);
  font-family: var(--mono-font);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  clip-path: polygon(0 12px, 12px 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 12px));
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.submit-button:hover,
.submit-button:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(115, 242, 255, 0.58);
  box-shadow: 0 0 28px rgba(115, 242, 255, 0.16);
}

.form-status {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.form-status.is-active {
  color: var(--cyan);
}

.form-status.is-error {
  color: #ff9bbd;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  --accent: var(--cyan);
  min-height: 280px;
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 22px;
  border: 1px solid rgba(115, 242, 255, 0.18);
  background:
    linear-gradient(155deg, rgba(9, 15, 25, 0.94), rgba(10, 18, 31, 0.68)),
    radial-gradient(circle at top right, rgba(115, 242, 255, 0.12), transparent 32%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.02) inset,
    0 18px 44px rgba(0, 0, 0, 0.34);
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.feature-card::before {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent) 22%, transparent), transparent 34%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.03), transparent 58%);
}

.feature-card:hover,
.feature-card:focus-visible {
  transform: translateY(-6px);
  border-color: color-mix(in srgb, var(--accent) 62%, rgba(255, 255, 255, 0.08));
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.03) inset,
    0 0 32px color-mix(in srgb, var(--accent) 14%, transparent),
    0 22px 56px rgba(0, 0, 0, 0.42);
}

.feature-card:nth-child(1) {
  --accent: var(--cyan);
}

.feature-card:nth-child(2) {
  --accent: var(--amber);
}

.feature-card:nth-child(3) {
  --accent: var(--lime);
}

.feature-card:nth-child(4) {
  --accent: var(--magenta);
}

.feature-card__chip {
  justify-self: start;
  padding: 8px 10px;
  border: 1px solid color-mix(in srgb, var(--accent) 26%, transparent);
  color: color-mix(in srgb, var(--accent) 78%, white 22%);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.feature-card__chip::before {
  display: none;
}

.feature-card__icon {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  background: color-mix(in srgb, var(--accent) 12%, rgba(6, 12, 20, 0.8));
  color: color-mix(in srgb, var(--accent) 84%, white 16%);
}

.feature-card__icon svg {
  width: 26px;
  height: 26px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card h3 {
  margin: 2px 0 0;
  font-size: 1.38rem;
  letter-spacing: 0.04em;
}

.feature-card__en {
  margin: 0;
  font-family: var(--mono-font);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--accent) 72%, white 18%);
}

.feature-card__desc {
  margin: 0;
  color: var(--muted);
  line-height: 1.74;
}

.feature-card--link {
  cursor: pointer;
}

.feature-card__action {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono-font);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--accent) 78%, white 18%);
}

.feature-card__action::after {
  content: "";
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, currentColor, transparent);
  transition: transform 0.24s ease;
}

.feature-card--link:hover .feature-card__action::after,
.feature-card--link:focus-visible .feature-card__action::after {
  transform: translateX(6px);
}

.entertainment-zone .feature-card {
  background:
    linear-gradient(155deg, rgba(9, 14, 24, 0.94), rgba(12, 18, 30, 0.7)),
    radial-gradient(circle at top right, rgba(255, 196, 77, 0.12), transparent 30%);
}

.site-footer {
  position: relative;
  width: var(--section-width);
  margin: 0 auto 54px;
  padding: 28px 26px 22px;
  border: 1px solid rgba(115, 242, 255, 0.2);
  background:
    linear-gradient(160deg, rgba(8, 14, 24, 0.94), rgba(10, 18, 31, 0.72)),
    radial-gradient(circle at top right, rgba(115, 242, 255, 0.08), transparent 28%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.02) inset,
    0 18px 48px rgba(0, 0, 0, 0.34);
  clip-path: polygon(0 18px, 18px 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 24px 100%, 0 calc(100% - 18px));
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 1px;
  clip-path: inherit;
  background:
    linear-gradient(135deg, rgba(115, 242, 255, 0.08), transparent 24%, rgba(255, 196, 77, 0.04) 72%, transparent),
    linear-gradient(rgba(115, 242, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(115, 242, 255, 0.08) 1px, transparent 1px);
  background-size: auto, 56px 56px, 56px 56px;
  opacity: 0.26;
  pointer-events: none;
}

.site-footer > * {
  position: relative;
  z-index: 1;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) repeat(3, minmax(0, 0.8fr));
  gap: 18px;
}

.site-footer__brand,
.site-footer__block {
  display: grid;
  align-content: start;
  gap: 14px;
  min-height: 100%;
  padding: 18px;
  border: 1px solid rgba(115, 242, 255, 0.12);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent),
    rgba(6, 11, 19, 0.52);
}

.site-footer__title {
  display: grid;
  gap: 10px;
  margin: 0;
  font-family: var(--title-font);
  font-size: clamp(1.9rem, 3.4vw, 3rem);
  line-height: 0.96;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-footer__title span {
  font-family: var(--cn-title-font);
  font-size: clamp(1.4rem, 2.2vw, 2rem);
  letter-spacing: 0.1em;
  color: #f4f0db;
}

.site-footer__copy {
  max-width: 34rem;
  margin: 0;
  color: var(--muted);
  line-height: 1.84;
}

.site-footer__label {
  margin: 0;
  color: var(--cyan);
  font-family: var(--mono-font);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.site-footer__links {
  display: grid;
  gap: 10px;
}

.site-footer__links a,
.site-footer__row strong {
  color: var(--muted-strong);
}

.site-footer__links a {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 34px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(115, 242, 255, 0.1);
  font-family: var(--mono-font);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.22s ease, transform 0.22s ease;
}

.site-footer__links a::before {
  content: "";
  width: 18px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  flex: 0 0 auto;
}

.site-footer__links a:hover,
.site-footer__links a:focus-visible {
  color: var(--text);
  transform: translateX(4px);
}

.site-footer__readout {
  display: grid;
  gap: 10px;
}

.site-footer__row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(115, 242, 255, 0.1);
  font-family: var(--mono-font);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.site-footer__row span {
  color: var(--muted);
}

.site-footer__row strong {
  font-weight: 600;
  text-align: right;
}

.site-footer__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(115, 242, 255, 0.12);
  color: var(--muted);
  font-family: var(--mono-font);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition:
    opacity 0.8s ease,
    transform 0.8s ease;
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@keyframes mesh-drift {
  0% {
    transform: translate3d(-3%, -2%, 0) scale(1);
  }
  100% {
    transform: translate3d(4%, 3%, 0) scale(1.08);
  }
}

@keyframes glow-pulse {
  0%,
  100% {
    opacity: 0.82;
  }
  50% {
    opacity: 1;
  }
}

@keyframes title-flicker {
  0%,
  82%,
  88%,
  100% {
    opacity: 1;
  }
  83%,
  85% {
    opacity: 0.92;
  }
  86% {
    opacity: 0.68;
  }
}

@keyframes glitch-top {
  0%,
  88%,
  100% {
    transform: translate(0, 0);
  }
  89% {
    transform: translate(4px, -2px);
  }
  92% {
    transform: translate(-3px, 1px);
  }
}

@keyframes glitch-bottom {
  0%,
  90%,
  100% {
    transform: translate(0, 0);
  }
  91% {
    transform: translate(-4px, 2px);
  }
  94% {
    transform: translate(3px, -1px);
  }
}

@keyframes blink {
  0%,
  45% {
    opacity: 1;
  }
  46%,
  100% {
    opacity: 0;
  }
}

@keyframes signal-shift {
  0%,
  100% {
    opacity: 0.7;
    transform: scaleX(0.98);
  }
  50% {
    opacity: 1;
    transform: scaleX(1);
  }
}

@keyframes message-rise {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes feed-insert {
  0% {
    opacity: 0;
    transform: translateY(12px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes card-soft-fade {
  0% {
    opacity: 0;
  }
  42% {
    opacity: 0.1;
  }
  100% {
    opacity: 0;
  }
}

@keyframes wall-soft-fade {
  0% {
    opacity: 0;
  }
  46% {
    opacity: 0.08;
  }
  100% {
    opacity: 0;
  }
}

@media (max-width: 1100px) {
  .hero,
  .message-wall__layout {
    grid-template-columns: 1fr;
  }

  .hero__frame {
    min-height: 500px;
  }

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

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

@media (max-width: 760px) {
  .topbar {
    position: static;
    top: auto;
    width: min(100%, calc(100% - 20px));
    padding: 18px 16px;
  }

  .hero,
  .section,
  .site-footer {
    width: min(100%, calc(100% - 24px));
  }

  .hero {
    min-height: auto;
    padding-top: 34px;
  }

  .hero__title {
    font-size: clamp(2.7rem, 15vw, 4.6rem);
  }

  .hero__subtitle {
    font-size: clamp(1.45rem, 7.5vw, 2rem);
    letter-spacing: 0.08em;
  }

  .hero__frame,
  .panel,
  .feature-card {
    clip-path: polygon(0 14px, 14px 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 14px));
  }

  .hero__frame {
    min-height: 420px;
  }

  .message-card {
    padding: 16px 16px 14px;
  }

  .message-modal {
    padding: 10px;
    align-items: end;
  }

  .message-modal__dialog {
    width: 100%;
    max-height: min(82vh, 720px);
    overflow: auto;
    padding: 18px 16px 16px;
  }

  .message-list {
    --message-card-height: 132px;
    --message-slot-gap: 12px;
  }

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

  .site-footer {
    margin-bottom: 26px;
    padding: 22px 18px 18px;
    clip-path: polygon(0 14px, 14px 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 14px));
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .site-footer__bar,
  .site-footer__row {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-footer__row strong {
    text-align: left;
  }
}

@media (max-width: 399px) {
  :root {
    --section-width: min(100%, calc(100% - 16px));
  }

  .topbar {
    width: var(--section-width);
    padding: 14px 12px;
    gap: 10px 14px;
  }

  .topbar__group,
  .topbar__nav {
    gap: 8px 10px;
  }

  .topbar__code,
  .topbar__nav a {
    font-size: 0.66rem;
    letter-spacing: 0.12em;
  }

  .topbar__name {
    font-size: 0.9rem;
    letter-spacing: 0.05em;
  }

  .hero,
  .section,
  .site-footer {
    width: var(--section-width);
  }

  .hero {
    padding-top: 22px;
    gap: 18px;
  }

  .hero__title {
    font-size: clamp(2.2rem, 13vw, 3.3rem);
  }

  .hero__subtitle {
    font-size: clamp(1.2rem, 6.6vw, 1.68rem);
  }

  .hero__frame,
  .panel,
  .feature-card,
  .site-footer {
    padding-inline: 12px;
  }

  .message-card,
  .feature-card,
  .site-footer__block {
    overflow-wrap: anywhere;
  }

  .site-footer {
    padding: 18px 14px 16px;
  }
}

@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;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .message-card {
    transition: none !important;
  }

  .message-card.is-entering,
  .message-card.is-leaving {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    max-height: none !important;
    margin: initial !important;
    padding-top: 18px !important;
    padding-bottom: 16px !important;
    border-width: 1px !important;
  }

  .message-list::after {
    display: none;
  }
}