:root {
  --bg: #0b1020;
  --bg-soft: #11192e;
  --panel: rgba(10, 17, 35, 0.72);
  --panel-border: rgba(243, 225, 187, 0.16);
  --text: #f6eedf;
  --muted: #c7bfaf;
  --accent: #f2b36d;
  --accent-soft: #ffd9a9;
  --mint: #81e4c7;
  --danger: #f47b74;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.36);
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif SC",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(242, 179, 109, 0.2), transparent 28%),
    radial-gradient(circle at 85% 15%, rgba(129, 228, 199, 0.18), transparent 22%),
    linear-gradient(135deg, #060912 0%, #0b1020 48%, #111a2d 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(circle at center, black 55%, transparent 95%);
}

.page-shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding:
    max(16px, env(safe-area-inset-top))
    0
    max(24px, env(safe-area-inset-bottom) + 24px);
}

.site-header {
  position: relative;
  padding: 28px;
  border: 1px solid var(--panel-border);
  border-radius: 28px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.06), transparent 45%),
    rgba(12, 18, 34, 0.72);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.brand-lockup {
  max-width: min(1200px, calc(100% - 300px));
  padding-right: 24px;
}

.eyebrow,
.panel-kicker,
.overlay-tag,
.coming-soon-label {
  margin: 0 0 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--accent-soft);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Baskerville", "Times New Roman", "Songti SC", "STSong", serif;
  font-weight: 600;
}

h1 {
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 0.92;
  letter-spacing: 0.03em;
  text-shadow:
    0 1px 0 rgba(255, 255, 255, 0.08),
    0 18px 40px rgba(0, 0, 0, 0.36);
}

.title-line {
  display: block;
  width: max-content;
  max-width: none;
  color: transparent;
  background-image:
    linear-gradient(180deg, #fff7e8 0%, #f6c789 38%, #fff1dc 60%, #9a6532 100%),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.95) 0,
      rgba(255, 255, 255, 0.95) 1px,
      rgba(247, 211, 156, 0.72) 1px,
      rgba(247, 211, 156, 0.72) 3px
    );
  background-clip: text;
  -webkit-background-clip: text;
}

.title-line-offset {
  margin-left: 4ch;
  white-space: nowrap;
}

.hero-copy {
  margin: 18px 0 0;
  max-width: 640px;
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.8;
  color: var(--muted);
}

.language-switcher {
  position: absolute;
  top: 24px;
  right: 24px;
  display: inline-flex;
  gap: 10px;
}

.lang-btn,
.action-btn {
  border: 1px solid rgba(255, 241, 220, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  cursor: pointer;
  transition:
    transform 180ms ease,
    background 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.lang-btn {
  min-width: 52px;
  padding: 10px 14px;
  font-size: 0.95rem;
}

.lang-btn.active,
.lang-btn:hover,
.action-btn:hover {
  background: linear-gradient(135deg, rgba(242, 179, 109, 0.24), rgba(129, 228, 199, 0.16));
  border-color: rgba(255, 225, 181, 0.42);
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.18);
  transform: translateY(-1px);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 24px;
  margin-top: 24px;
}

.panel {
  position: relative;
  border: 1px solid var(--panel-border);
  border-radius: 28px;
  padding: 26px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent 22%),
    var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.panel-heading h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
}

.scoreboard {
  min-width: 112px;
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  text-align: right;
}

.scoreboard span {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
}

.scoreboard strong {
  display: block;
  margin-top: 6px;
  font-size: 1.6rem;
  color: var(--accent-soft);
}

.game-stage {
  position: relative;
  min-height: 560px;
  padding: 22px;
  border-radius: 24px;
  background:
    radial-gradient(circle at top, rgba(129, 228, 199, 0.12), transparent 40%),
    rgba(3, 8, 19, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.game-board {
  display: grid;
  grid-template-columns: repeat(18, minmax(0, 1fr));
  gap: 5px;
  aspect-ratio: 1 / 1;
  width: min(100%, 520px);
  margin: 0 auto;
  touch-action: none;
  overscroll-behavior: contain;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.cell {
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
}

.cell.snake {
  background:
    linear-gradient(145deg, rgba(255, 241, 220, 0.22), transparent 58%),
    linear-gradient(135deg, #f2b36d, #ed8f6a);
  box-shadow:
    inset 0 -6px 12px rgba(0, 0, 0, 0.18),
    0 0 16px rgba(242, 179, 109, 0.25);
}

.cell.head {
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.28), transparent 45%),
    linear-gradient(135deg, #9bf4d5, #41c8a1);
  box-shadow:
    inset 0 -6px 12px rgba(0, 0, 0, 0.22),
    0 0 20px rgba(129, 228, 199, 0.35);
}

.cell.food {
  background:
    radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.5), transparent 25%),
    linear-gradient(135deg, #fff0c8, #ff7b7b);
  box-shadow:
    inset 0 -4px 10px rgba(0, 0, 0, 0.2),
    0 0 18px rgba(244, 123, 116, 0.36);
  animation: pulse 1.2s ease-in-out infinite;
}

.overlay-card {
  position: absolute;
  inset: 50% auto auto 50%;
  width: min(88%, 420px);
  transform: translate(-50%, -50%);
  padding: 28px;
  border-radius: 24px;
  text-align: center;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.1), transparent 100%),
    rgba(10, 15, 28, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(20px);
}

.overlay-card h3 {
  font-size: clamp(2rem, 5vw, 3rem);
}

.overlay-card p {
  margin: 14px 0 0;
  line-height: 1.7;
  color: var(--muted);
}

.hidden {
  display: none;
}

.action-btn {
  margin-top: 20px;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
}

.game-footer {
  margin-top: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.coming-soon {
  display: flex;
  min-height: 560px;
  flex-direction: column;
  justify-content: center;
  border-radius: 24px;
  padding: 32px;
  background:
    radial-gradient(circle at top right, rgba(242, 179, 109, 0.16), transparent 28%),
    radial-gradient(circle at left center, rgba(129, 228, 199, 0.16), transparent 30%),
    rgba(6, 11, 24, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.coming-soon h3 {
  font-size: clamp(2.3rem, 6vw, 4.1rem);
  color: var(--accent-soft);
}

.coming-soon p {
  max-width: 420px;
  line-height: 1.8;
  color: var(--muted);
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.06);
  }
}

@media (max-width: 960px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  .language-switcher {
    position: static;
    margin-top: 22px;
  }

  .brand-lockup {
    max-width: 100%;
    padding-right: 0;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 20px, 1200px);
  }

  .site-header,
  .panel {
    padding: 20px;
    border-radius: 24px;
  }

  .panel-heading {
    flex-direction: column;
  }

  .scoreboard {
    width: 100%;
    text-align: left;
  }

  .game-stage,
  .coming-soon {
    min-height: auto;
    padding: 18px;
  }

  .game-board {
    gap: 4px;
    width: 100%;
  }

  .title-line-offset {
    margin-left: 2ch;
  }

  .overlay-card {
    width: min(92%, 420px);
    padding: 22px;
  }

  .coming-soon {
    min-height: 320px;
  }
}

@media (max-width: 540px) {
  .page-shell {
    width: min(100% - 16px, 1200px);
  }

  .site-header,
  .panel {
    padding: 16px;
    border-radius: 20px;
  }

  .site-header {
    padding-top: 56px;
  }

  h1 {
    font-size: clamp(2rem, 12vw, 3.2rem);
    line-height: 0.95;
    letter-spacing: 0.01em;
  }

  .title-line {
    width: auto;
    max-width: 100%;
  }

  .title-line-offset {
    margin-left: 0.55ch;
  }

  .hero-copy {
    margin-top: 14px;
    width: 100%;
    max-width: none;
    font-size: 0.98rem;
    line-height: 1.65;
    word-break: normal;
    overflow-wrap: normal;
  }

  .eyebrow {
    display: none;
  }

  .language-switcher {
    position: absolute;
    top: 14px;
    right: 14px;
    gap: 8px;
    margin-top: 0;
  }

  .lang-btn {
    min-width: 48px;
    padding: 9px 12px;
  }

  .panel-heading h2 {
    font-size: clamp(1.9rem, 10vw, 2.7rem);
  }

  .scoreboard {
    padding: 10px 14px;
    border-radius: 18px;
  }

  .game-stage {
    padding: 14px;
  }

  .game-board {
    gap: 3px;
  }

  .cell {
    border-radius: 8px;
  }

  .overlay-card {
    width: min(94%, 360px);
    padding: 20px 18px;
    border-radius: 20px;
  }

  .overlay-card h3 {
    font-size: clamp(1.8rem, 10vw, 2.6rem);
  }

  .overlay-card p,
  .game-footer,
  .coming-soon p {
    font-size: 0.96rem;
    line-height: 1.7;
  }

  .action-btn {
    width: 100%;
    padding: 12px 22px;
  }

  .coming-soon {
    min-height: 280px;
    padding: 22px 18px;
  }

  .coming-soon h3 {
    font-size: clamp(2rem, 14vw, 3.3rem);
  }
}

@media (max-width: 400px) {
  h1 {
    font-size: clamp(1.78rem, 11vw, 2.7rem);
  }

  .title-line-offset {
    margin-left: 0;
  }

  .hero-copy {
    font-size: 0.92rem;
  }
}