:root {
  --bg: #05080b;
  --ink: #f1eee5;
  --muted: #9da3a6;
  --line: rgba(255, 255, 255, 0.13);
  --amber: #f2a33a;
  --red: #b72820;
  color-scheme: dark;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  background: var(--bg);
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui,
    sans-serif;
  line-height: 1.6;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
}
.site-shell {
  overflow: hidden;
  background:
    radial-gradient(
      circle at 90% 25%,
      rgba(108, 43, 18, 0.15),
      transparent 32rem
    ),
    var(--bg);
}
.topbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: 82px;
  padding: 0 4vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid transparent;
  background: linear-gradient(#05080bd9, transparent);
  backdrop-filter: blur(5px);
}
.wordmark img {
  width: 92px;
  height: 58px;
  object-fit: contain;
}
.main-nav {
  display: flex;
  gap: clamp(20px, 3vw, 48px);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.main-nav a {
  color: #d2d2cf;
  transition: 0.25s;
}
.main-nav a:hover {
  color: #fff;
  text-shadow: 0 0 18px #f2a33a;
}
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
}
.lang-toggle i {
  display: block;
  width: 1px;
  height: 15px;
  background: #777;
}
.lang-toggle button {
  padding: 5px;
  border: 0;
  background: none;
  color: #777;
  cursor: pointer;
  font-size: 12px;
}
.lang-toggle button.active {
  color: #fff;
}
.hero-section {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -3;
  background-image: url("/media/output/hero-main-hq.webp");
  background-size: cover;
  background-position: center;
  filter: brightness(1.04) contrast(1.02);
}
.hero-section:before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(
      90deg,
      rgba(3, 6, 8, 0.9) 0%,
      rgba(3, 6, 8, 0.48) 29%,
      rgba(3, 6, 8, 0.1) 64%,
      rgba(3, 6, 8, 0.45) 100%
    ),
    linear-gradient(0deg, #05080b 0%, transparent 20%, rgba(0, 0, 0, 0.18) 100%);
}
.hero-atmosphere {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.fog-layer {
  position: absolute;
  left: -30%;
  width: 160%;
  will-change: transform;
  transform: translate3d(0, 0, 0);
  background-repeat: repeat-x;
  mix-blend-mode: screen;
}
.fog-far {
  top: 12%;
  height: 58%;
  opacity: 0.12;
  filter: blur(32px);
  background-image:
    radial-gradient(ellipse at 12% 55%, rgba(141, 155, 160, 0.46) 0 12%, transparent 35%),
    radial-gradient(ellipse at 42% 35%, rgba(103, 119, 126, 0.42) 0 15%, transparent 38%),
    radial-gradient(ellipse at 73% 60%, rgba(147, 153, 150, 0.38) 0 13%, transparent 36%),
    radial-gradient(ellipse at 94% 30%, rgba(99, 115, 124, 0.4) 0 14%, transparent 38%);
  background-size: 72% 100%;
  animation: fog-drift-far 34s ease-in-out infinite alternate;
  mask-image: linear-gradient(90deg, transparent 0%, #000 18%, #000 100%);
}
.fog-mid {
  bottom: 5%;
  height: 46%;
  opacity: 0.2;
  filter: blur(24px);
  background-image:
    radial-gradient(ellipse at 8% 70%, rgba(139, 143, 138, 0.55) 0 12%, transparent 34%),
    radial-gradient(ellipse at 30% 55%, rgba(112, 122, 123, 0.56) 0 16%, transparent 40%),
    radial-gradient(ellipse at 58% 72%, rgba(151, 143, 126, 0.46) 0 13%, transparent 37%),
    radial-gradient(ellipse at 84% 48%, rgba(119, 128, 127, 0.52) 0 16%, transparent 40%);
  background-size: 68% 100%;
  animation: fog-drift-mid 23s ease-in-out infinite alternate-reverse;
  mask-image: linear-gradient(90deg, transparent 0%, rgba(0, 0, 0, 0.35) 14%, #000 38%, #000 100%);
}
.fog-near {
  bottom: -13%;
  height: 42%;
  opacity: 0.28;
  filter: blur(18px);
  background-image:
    radial-gradient(ellipse at 5% 60%, rgba(170, 166, 151, 0.55) 0 15%, transparent 38%),
    radial-gradient(ellipse at 28% 74%, rgba(134, 143, 142, 0.62) 0 17%, transparent 42%),
    radial-gradient(ellipse at 55% 54%, rgba(174, 161, 138, 0.48) 0 14%, transparent 38%),
    radial-gradient(ellipse at 82% 70%, rgba(128, 137, 136, 0.62) 0 18%, transparent 43%);
  background-size: 62% 100%;
  animation: fog-drift-near 17s ease-in-out infinite alternate;
}
.embers {
  position: absolute;
  inset: 20% 0 -35%;
  opacity: 0.48;
  will-change: transform;
  background-image:
    radial-gradient(circle, rgba(255, 180, 77, 0.95) 0 1px, transparent 2px),
    radial-gradient(circle, rgba(216, 91, 33, 0.85) 0 1.2px, transparent 2.2px),
    radial-gradient(circle, rgba(255, 204, 123, 0.7) 0 0.8px, transparent 1.8px);
  background-position: 12px 40px, 80px 120px, 135px 15px;
  background-size: 190px 250px, 270px 320px, 230px 290px;
  mask-image: linear-gradient(90deg, transparent 0%, transparent 35%, #000 58%, #000 100%);
  animation: embers-rise 12s linear infinite;
}
@keyframes fog-drift-far {
  from { transform: translate3d(-4%, -1%, 0) scale(1.04); }
  to { transform: translate3d(7%, 2%, 0) scale(1.1); }
}
@keyframes fog-drift-mid {
  from { transform: translate3d(5%, 2%, 0) scale(1.06); }
  to { transform: translate3d(-8%, -3%, 0) scale(1.12); }
}
@keyframes fog-drift-near {
  from { transform: translate3d(-6%, 2%, 0) scale(1.04); }
  to { transform: translate3d(8%, -4%, 0) scale(1.13); }
}
@keyframes embers-rise {
  from { transform: translate3d(0, 12%, 0); }
  to { transform: translate3d(-1.5%, -22%, 0); }
}
.hero-content {
  width: min(590px, 88vw);
  margin-left: 8vw;
  padding-top: 70px;
}
.hero-logo {
  width: clamp(210px, 26vw, 390px);
  height: auto;
  filter: drop-shadow(0 18px 30px #000);
}
.kicker {
  margin: 18px 0 10px;
  color: var(--amber);
  font-weight: 750;
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}
.hero-content h1 {
  max-width: 570px;
  margin: 0;
  font-family: Georgia, "Noto Serif SC", serif;
  font-size: clamp(30px, 4vw, 62px);
  font-weight: 500;
  line-height: 1.18;
  letter-spacing: -0.03em;
  text-shadow: 0 4px 30px #000;
}
.hero-copy {
  max-width: 560px;
  color: #b7bab9;
  font-size: clamp(14px, 1.3vw, 17px);
}
.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 30px;
}
.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 50px;
  padding: 0 22px;
  border: 1px solid var(--line);
  font-size: 13px;
  letter-spacing: 0.06em;
  transition: 0.25s;
}
.cta.primary {
  border-color: #e99c35;
  background: #e99c35;
  color: #171006;
  font-weight: 800;
}
.cta.ghost {
  background: rgba(0, 0, 0, 0.2);
}
.cta:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
}
.scroll-cue {
  position: absolute;
  bottom: 30px;
  left: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: #85898a;
  font-size: 8px;
  letter-spacing: 0.28em;
}
.scroll-cue span {
  width: 1px;
  height: 34px;
  background: linear-gradient(#fff, transparent);
  animation: pulse 1.6s infinite;
}
@keyframes pulse {
  50% {
    opacity: 0.25;
    transform: scaleY(0.7);
  }
}
.section {
  padding: clamp(80px, 10vw, 150px) max(6vw, 24px);
}
.section-heading {
  width: min(720px, 100%);
  margin: 0 auto 48px;
  text-align: center;
}
.section-heading h2,
.media-heading h2,
.story-intro h2,
.download-copy h2 {
  margin: 0;
  font-family: Georgia, "Noto Serif SC", serif;
  font-weight: 500;
  font-size: clamp(36px, 5vw, 72px);
  line-height: 1.1;
  letter-spacing: -0.045em;
}
.section-heading > p:last-child,
.story-intro > p:last-child,
.download-copy > p {
  color: var(--muted);
}
.trailer-section {
  position: relative;
  background: linear-gradient(180deg, #05080b, #0b0e11 45%, #05080b);
}
.video-frame {
  position: relative;
  width: min(1180px, 100%);
  aspect-ratio: 16/9;
  margin: auto;
  border: 1px solid #30363a;
  background: #000;
  box-shadow: 0 35px 90px #000;
}
.video-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
}
.video-poster {
  position: absolute;
  inset: 0;
  padding: 0;
  border: 0;
  background: #000;
  cursor: pointer;
  color: #fff;
  overflow: hidden;
}
.video-poster:after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.72), transparent 65%);
}
.video-poster img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.66) saturate(0.75);
  transition: 0.7s;
}
.video-poster:hover img {
  transform: scale(1.025);
  filter: brightness(0.78) saturate(0.9);
}
.play-button {
  position: absolute;
  z-index: 2;
  left: 50%;
  top: 50%;
  display: grid;
  place-items: center;
  width: 78px;
  height: 78px;
  border: 1px solid #fff;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.35);
  transform: translate(-50%, -50%);
  font-size: 22px;
  padding-left: 4px;
}
.video-poster strong {
  position: absolute;
  z-index: 2;
  bottom: 26px;
  left: 32px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.story-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(480px, 1.1fr);
  gap: 8vw;
  align-items: start;
  background: radial-gradient(
    circle at 20% 40%,
    rgba(157, 58, 22, 0.14),
    transparent 35rem
  );
}
.story-intro {
  position: sticky;
  top: 130px;
}
.feature-stack {
  border-top: 1px solid var(--line);
}
.feature-stack article {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 24px;
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}
.feature-stack article > span {
  color: var(--amber);
  font-family: Georgia, serif;
  font-size: 14px;
}
.feature-stack h3 {
  margin: 0 0 12px;
  font-family: Georgia, "Noto Serif SC", serif;
  font-size: clamp(25px, 3vw, 40px);
  font-weight: 500;
}
.feature-stack p {
  margin: 0;
  color: var(--muted);
}
.media-section {
  background: #080b0e;
}
.media-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
  width: min(1400px, 100%);
  margin: 0 auto 38px;
}
.carousel-shell {
  position: relative;
  width: min(1540px, calc(100vw - 30px));
  margin: 0 auto;
  padding: 0 70px;
}
.carousel-arrow {
  position: absolute;
  z-index: 5;
  top: 50%;
  display: grid;
  place-items: center;
  width: 58px;
  height: 78px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 4px;
  background: rgba(14, 18, 21, 0.5);
  color: #fff;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.42), inset 0 1px rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px) saturate(135%);
  -webkit-backdrop-filter: blur(16px) saturate(135%);
  transform: translateY(-50%);
  cursor: pointer;
  transition: 0.25s;
}
.carousel-arrow span {
  font-size: 25px;
  line-height: 1;
  transition: transform 0.25s;
}
.carousel-prev { left: 2px; }
.carousel-next { right: 2px; }
.carousel-arrow:hover {
  border-color: rgba(242, 163, 58, 0.75);
  background: rgba(35, 34, 30, 0.68);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.5), 0 0 24px rgba(242, 163, 58, 0.12);
}
.carousel-prev:hover span { transform: translateX(-3px); }
.carousel-next:hover span { transform: translateX(3px); }
.carousel-arrow:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}
.screen-track {
  display: flex;
  gap: 18px;
  width: 100%;
  margin: auto;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  overscroll-behavior-inline: contain;
}
.screen-track::-webkit-scrollbar {
  display: none;
}
.screen-track figure {
  flex: 0 0 min(1120px, 82vw);
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #111;
  scroll-snap-align: start;
}
.screen-track img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 2.16/1;
  object-fit: cover;
  transition: 0.5s;
}
.screen-track figure:hover img {
  transform: scale(1.02);
  filter: brightness(1.08);
}
.download-section {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(50px, 10vw, 150px);
  background: linear-gradient(120deg, #15100d, #07090b 55%);
}
.download-copy {
  max-width: 650px;
}
.download-copy > p {
  max-width: 580px;
}
.app-icon {
  width: clamp(170px, 24vw, 330px);
  border-radius: 22%;
  box-shadow:
    0 30px 80px #000,
    0 0 80px rgba(221, 91, 30, 0.15);
}
.store-links {
  display: flex;
  gap: 18px;
  margin-top: 30px;
}
.store-links a {
  display: block;
  width: 190px;
  aspect-ratio: 3.02/1;
}
.store-links img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.direct-download {
  width: 250px;
  max-width: 100%;
  min-height: 52px;
  margin-top: 30px;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 9px;
  color: #fff;
  background: rgba(255, 255, 255, 0.035);
  transition: 0.25s;
}
.direct-download:hover {
  border-color: var(--amber);
  background: rgba(242, 163, 58, 0.09);
  transform: translateY(-2px);
}
.android-mark {
  color: #a4c639;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.04em;
}
.direct-download > span:nth-child(2) {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 2px;
}
.direct-download strong {
  font-size: 13px;
}
.direct-download small {
  color: rgba(255, 255, 255, 0.5);
  font-size: 10px;
}
.direct-download > b {
  color: var(--amber);
  font-size: 15px;
}
.download-copy > .store-region-note {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.48);
  font-size: 14px;
  letter-spacing: 0.04em;
}
.community-section {
  background:
    radial-gradient(
      circle at 50% 80%,
      rgba(182, 64, 31, 0.15),
      transparent 35rem
    ),
    #07090b;
}
.community-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  width: min(1120px, 100%);
  margin: auto;
}
.community-grid > a,
.wechat-card {
  min-height: 240px;
  padding: 24px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
  display: flex;
  align-items: center;
  gap: 22px;
  transition: 0.25s;
}
.community-grid > a:hover {
  border-color: #a86732;
  transform: translateY(-3px);
}
.community-grid > a img {
  width: 135px;
  aspect-ratio: 1;
  object-fit: cover;
}
.community-grid > a div {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.community-grid b {
  font-family: Georgia, serif;
  font-size: 21px;
}
.community-grid span {
  color: #bfc1c0;
  font-size: 12px;
}
.wechat-card {
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}
.wechat-card span {
  color: var(--amber);
  letter-spacing: 0.16em;
}
.wechat-card strong {
  font-size: clamp(24px, 3vw, 36px);
}
.wechat-card small {
  color: var(--muted);
}
.site-footer {
  padding: 42px 5vw;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 30px;
  color: #777;
  font-size: 12px;
}
.studio {
  display: flex;
  align-items: center;
  gap: 12px;
}
.studio img {
  width: 46px;
  height: 46px;
  object-fit: contain;
}
.studio div {
  display: flex;
  flex-direction: column;
}
.studio strong {
  color: #ddd;
  letter-spacing: 0.12em;
}
.footer-links {
  display: flex;
  gap: 28px;
  color: #bbb;
}
.site-footer > small {
  text-align: right;
}
.doc-page {
  min-height: 100vh;
  padding-top: 120px;
  background:
    radial-gradient(
      circle at 80% 10%,
      rgba(163, 55, 19, 0.14),
      transparent 30rem
    ),
    #07090b;
}
.doc-header,
.doc-body {
  width: min(960px, 90vw);
  margin: auto;
}
.doc-header {
  padding: 50px 0;
  border-bottom: 1px solid var(--line);
}
.doc-header h1 {
  margin: 0;
  font-family: Georgia, "Noto Serif SC", serif;
  font-size: clamp(44px, 7vw, 80px);
  font-weight: 500;
}
.doc-body {
  padding: 55px 0 120px;
}
.doc-body section {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}
.doc-body h2 {
  font-family: Georgia, "Noto Serif SC", serif;
  font-size: 26px;
  font-weight: 500;
}
.doc-body h3 {
  margin-top: 24px;
}
.doc-body p,
.doc-body li {
  color: #b7bbbc;
}
.doc-notice {
  padding: 18px 22px !important;
  border: 1px solid rgba(242, 163, 58, 0.35) !important;
  background: rgba(242, 163, 58, 0.08);
}
.support-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.support-cards section {
  padding: 26px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
}
.back-home {
  position: fixed;
  z-index: 50;
  left: 4vw;
  top: 30px;
  font-size: 12px;
  letter-spacing: 0.12em;
}
.doc-lang {
  position: fixed;
  z-index: 50;
  right: 4vw;
  top: 24px;
}
@media (max-width: 900px) {
  .topbar {
    height: 112px;
    padding: 0 4vw 8px;
    flex-wrap: wrap;
    align-content: flex-start;
    background: rgba(5, 8, 11, 0.9);
    backdrop-filter: blur(12px);
  }
  .wordmark,
  .lang-toggle {
    height: 68px;
    display: flex;
    align-items: center;
  }
  .main-nav {
    order: 3;
    display: flex;
    width: 100%;
    height: 36px;
    gap: 0;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    border-top: 1px solid rgba(255, 255, 255, 0.07);
    font-size: 11px;
    white-space: nowrap;
  }
  .main-nav::-webkit-scrollbar {
    display: none;
  }
  .main-nav a {
    flex: 1 0 auto;
    min-width: max-content;
    padding: 10px clamp(12px, 3.5vw, 24px);
    text-align: center;
  }
  main section[id] {
    scroll-margin-top: 112px;
  }
  .hero-content {
    margin-left: 6vw;
  }
  .story-section {
    grid-template-columns: 1fr;
  }
  .story-intro {
    position: static;
  }
  .community-grid {
    grid-template-columns: 1fr 1fr;
  }
  .wechat-card {
    grid-column: 1/-1;
    min-height: 150px;
  }
  .site-footer {
    grid-template-columns: 1fr auto;
  }
  .site-footer > small {
    grid-column: 1/-1;
    text-align: left;
  }
  .download-section {
    align-items: flex-start;
  }
  .support-cards {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 620px) {
  .topbar {
    height: 112px;
  }
  .wordmark img {
    width: 76px;
  }
  .hero-section {
    min-height: 850px;
    align-items: flex-end;
    padding-bottom: 110px;
  }
  .hero-bg {
    background-color: #05080b;
    background-size: auto clamp(470px, 128vw, 560px);
    background-position: 58% 30px;
    background-repeat: no-repeat;
  }
  .fog-far { opacity: 0.08; }
  .fog-mid { opacity: 0.13; }
  .fog-near { opacity: 0.18; }
  .embers { opacity: 0.3; }
  .hero-section:before {
    background:
      linear-gradient(
        0deg,
        #05080b 4%,
        rgba(3, 6, 8, 0.75) 42%,
        rgba(3, 6, 8, 0.12) 80%
      ),
      linear-gradient(90deg, rgba(3, 6, 8, 0.5), transparent);
  }
  .hero-content {
    margin: 0 22px;
    padding: 0;
  }
  .hero-logo {
    display: block;
    width: 190px;
    margin-left: auto;
    transform: translateY(-36px);
  }
  .hero-content h1 {
    font-size: 34px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .scroll-cue {
    display: none;
  }
  .section {
    padding: 75px 20px;
  }
  .section-heading {
    text-align: left;
  }
  .section-heading h2,
  .story-intro h2,
  .download-copy h2 {
    font-size: 40px;
  }
  .play-button {
    width: 60px;
    height: 60px;
  }
  .video-poster strong {
    left: 18px;
    bottom: 14px;
  }
  .story-section {
    gap: 40px;
  }
  .feature-stack article {
    grid-template-columns: 42px 1fr;
    gap: 12px;
  }
  .media-heading {
    align-items: flex-end;
  }
  .carousel-shell {
    width: 100vw;
    margin-left: -20px;
    padding: 0 14px;
  }
  .carousel-arrow {
    width: 44px;
    height: 60px;
    background: rgba(14, 18, 21, 0.62);
  }
  .carousel-prev { left: 18px; }
  .carousel-next { right: 18px; }
  .screen-track figure {
    flex-basis: calc(100vw - 40px);
  }
  .download-section {
    flex-direction: column-reverse;
  }
  .app-icon {
    width: 160px;
  }
  .store-links {
    gap: 8px;
  }
  .store-links a {
    width: 150px;
  }
  .community-grid {
    grid-template-columns: 1fr;
  }
  .community-grid > a,
  .wechat-card {
    min-height: 170px;
  }
  .community-grid > a img {
    width: 110px;
  }
  .wechat-card {
    grid-column: auto;
  }
  .site-footer {
    grid-template-columns: 1fr;
  }
  .footer-links {
    justify-content: flex-start;
  }
  .doc-page {
    padding-top: 90px;
  }
  .doc-header {
    padding: 35px 0;
  }
  .doc-body {
    padding-top: 30px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .scroll-cue span {
    animation: none;
  }
  * {
    transition: none !important;
  }
  .fog-layer,
  .embers {
    animation: none !important;
  }
}

[data-lang="zh"],
[data-lang="en"] {
  display: none;
}

html[lang="zh-CN"] [data-lang="zh"],
html[lang="en"] [data-lang="en"] {
  display: revert;
}

html[lang="zh-CN"] .screen-track[data-lang="zh"],
html[lang="en"] .screen-track[data-lang="en"] {
  display: flex;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  min-height: 76px;
  padding: 0 5vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 8, 11, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  font-family: Georgia, serif;
  letter-spacing: 0.16em;
  font-weight: 700;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #bbb;
  font-size: 13px;
}

.language-switch {
  display: flex;
  gap: 6px;
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.language-switch button {
  border: 0;
  padding: 5px;
  background: transparent;
  color: #777;
  cursor: pointer;
}

.language-switch button[aria-pressed="true"] {
  color: #fff;
}

.document-shell {
  width: min(960px, 90vw);
  margin: 0 auto;
  padding: 140px 0 100px;
}

.document-header {
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

.document-header h1 {
  margin: 0;
  font-family: Georgia, "Noto Serif SC", serif;
  font-size: clamp(44px, 7vw, 80px);
  font-weight: 500;
}

.document {
  padding-top: 45px;
}

.document section {
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.document h2 {
  font-family: Georgia, "Noto Serif SC", serif;
  font-weight: 500;
  font-size: 26px;
}

.document p,
.document li {
  color: #b7bbbc;
}

.notice {
  padding: 18px 22px;
  border: 1px solid rgba(242, 163, 58, 0.35);
  background: rgba(242, 163, 58, 0.08);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.support-card {
  padding: 26px !important;
  border: 1px solid var(--line) !important;
  background: rgba(255, 255, 255, 0.025);
}

.contact-link,
.document a {
  color: #f2a33a;
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding-top: 12px;
    padding-bottom: 12px;
  }
  .nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
  }
  .document-shell {
    padding-top: 150px;
  }
  .support-grid {
    grid-template-columns: 1fr;
  }
}