:root {
  --ink: #0f172a;
  --muted: #5f6f89;
  --line: #dbe7f7;
  --paper: #f6faff;
  --surface: #ffffff;
  --blue: #2563eb;
  --blue-dark: #174bbf;
  --cyan: #15b8d4;
  --green: #10a37f;
  --purple: #7c3aed;
  --orange: #f59e0b;
  --shadow: 0 24px 80px rgba(30, 64, 175, 0.14);
  --page-gutter: clamp(22px, 4vw, 58px);
  --content-max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  background:
    radial-gradient(circle at 12% 8%, rgba(37, 99, 235, 0.12), transparent 28%),
    radial-gradient(circle at 88% 12%, rgba(21, 184, 212, 0.12), transparent 30%),
    linear-gradient(180deg, #ffffff 0%, var(--paper) 54%, #ffffff 100%);
  letter-spacing: 0;
  overflow-x: hidden;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 var(--page-gutter);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(219, 231, 247, 0.9);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.05);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.promo-actions,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-size: 20px;
  font-weight: 900;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 9px;
}

.nav-links {
  gap: 30px;
  color: #536276;
  font-size: 15px;
  font-weight: 800;
}

.nav-links a,
.header-action {
  transition: color 0.16s ease, transform 0.16s ease;
}

.nav-links a:hover,
.header-action:hover {
  color: var(--blue);
}

.header-action {
  color: var(--blue-dark);
  font-weight: 900;
}

.announcement-bar[hidden] {
  display: none;
}

.announcement-bar {
  position: sticky;
  top: 72px;
  z-index: 29;
  padding: 10px var(--page-gutter);
  border-bottom: 1px solid rgba(191, 219, 254, 0.78);
  background: rgba(248, 251, 255, 0.9);
  box-shadow: 0 14px 34px rgba(37, 99, 235, 0.08);
  backdrop-filter: blur(16px);
}

.announcement-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  width: min(100%, var(--content-max));
  min-height: 34px;
  margin: 0 auto;
  color: #334155;
  font-size: 14px;
  font-weight: 700;
}

.announcement-dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  box-shadow: 0 0 0 5px rgba(37, 99, 235, 0.1);
}

.announcement-inner strong {
  flex: 0 0 auto;
  color: var(--blue-dark);
  font-size: 14px;
  font-weight: 900;
  white-space: nowrap;
}

.announcement-inner span:last-child {
  min-width: 0;
  overflow: hidden;
  color: #475569;
  line-height: 1.7;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.promo-section {
  position: relative;
  display: grid;
  grid-template-columns: minmax(340px, 450px) minmax(380px, 520px);
  gap: clamp(18px, 2vw, 32px);
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 72px);
  padding: clamp(48px, 5vw, 68px) clamp(22px, 4vw, 64px) clamp(50px, 5vw, 70px);
  overflow: hidden;
  background:
    linear-gradient(rgba(209, 225, 255, 0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(209, 225, 255, 0.35) 1px, transparent 1px),
    linear-gradient(135deg, #ffffff 0%, #f5f9ff 48%, #eef6ff 100%);
  background-size: 36px 36px, 36px 36px, auto;
}

.promo-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 22% 78%, rgba(37, 99, 235, 0.18), transparent 24%),
    radial-gradient(circle at 76% 22%, rgba(21, 184, 212, 0.14), transparent 26%),
    linear-gradient(120deg, transparent 36%, rgba(37, 99, 235, 0.07) 36%, rgba(37, 99, 235, 0.07) 37%, transparent 37%);
  pointer-events: none;
}

.promo-section::after {
  content: "";
  position: absolute;
  left: -8vw;
  bottom: -16vh;
  width: min(720px, 54vw);
  aspect-ratio: 1;
  border: 1px solid rgba(37, 99, 235, 0.14);
  border-radius: 34px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.82), rgba(219, 234, 254, 0.34)),
    radial-gradient(circle at 50% 42%, rgba(37, 99, 235, 0.16), transparent 36%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
  transform: rotate(-18deg);
  pointer-events: none;
}

.promo-image,
.promo-shade {
  display: none;
}

.promo-content,
.feature-strip,
.promo-video-frame {
  position: relative;
  z-index: 2;
  min-width: 0;
}

.promo-content {
  grid-column: 1;
  grid-row: 1;
  align-self: center;
  width: 100%;
  max-width: 430px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.promo-content h1 {
  margin: 0;
  width: max-content;
  max-width: 100%;
  color: transparent;
  background: linear-gradient(90deg, #2563eb 0%, #0f172a 72%);
  -webkit-background-clip: text;
  background-clip: text;
  font-size: clamp(82px, 8vw, 132px);
  line-height: 0.9;
}

.promo-copy {
  max-width: 420px;
  margin: 22px 0 0;
  color: #334155;
  font-size: clamp(17px, 1.25vw, 20px);
  line-height: 1.75;
  overflow-wrap: anywhere;
}

.promo-line {
  margin: 12px 0 0;
  color: #174bbf;
  font-size: 18px;
  font-weight: 900;
  line-height: 1.5;
}

.promo-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
  width: min(100%, 430px);
}

.promo-actions .button {
  width: 100%;
  min-height: 58px;
  padding: 0 18px;
  font-size: 16px;
}

.promo-actions #reviewJumpButton,
.promo-actions .button.contact {
  grid-column: 1 / -1;
}

.game-marquee {
  width: min(100%, 430px);
  margin-top: 24px;
  padding: 14px;
  overflow: hidden;
  border: 1px solid rgba(191, 219, 254, 0.9);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 18px 48px rgba(37, 99, 235, 0.12);
  backdrop-filter: blur(14px);
}

.game-marquee-title {
  margin-bottom: 10px;
  color: #1f3b6d;
  font-size: 13px;
  font-weight: 900;
}

.game-marquee-viewport {
  position: relative;
  overflow: hidden;
  width: 100%;
}

.game-marquee-viewport::before,
.game-marquee-viewport::after {
  content: "";
  position: absolute;
  top: 0;
  z-index: 2;
  width: 34px;
  height: 100%;
  pointer-events: none;
}

.game-marquee-viewport::before {
  left: 0;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0));
}

.game-marquee-viewport::after {
  right: 0;
  background: linear-gradient(270deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0));
}

.game-marquee-track {
  display: flex;
  width: max-content;
  gap: 6px;
  animation: gameMarquee 9s linear infinite;
}

.game-marquee:hover .game-marquee-track {
  animation-play-state: paused;
}

.game-chip {
  display: grid;
  grid-template-columns: 34px 68px;
  align-items: center;
  gap: 7px;
  min-width: 112px;
  min-height: 48px;
  padding: 6px 8px 6px 6px;
  border: 1px solid rgba(219, 231, 247, 0.94);
  border-radius: 8px;
  background: linear-gradient(135deg, #ffffff, #f3f8ff);
  color: #1e293b;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.09);
}

.game-chip img {
  display: block;
  width: 34px;
  height: 34px;
  padding: 4px;
  border-radius: 8px;
  background:
    radial-gradient(circle at 28% 24%, rgba(255, 255, 255, 0.36), transparent 24%),
    linear-gradient(135deg, #2563eb, #15b8d4);
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.16);
  object-fit: contain;
}

.game-chip:nth-child(4n + 2) img {
  background:
    radial-gradient(circle at 28% 24%, rgba(255, 255, 255, 0.34), transparent 24%),
    linear-gradient(135deg, #10a37f, #22c55e);
}

.game-chip:nth-child(4n + 3) img {
  background:
    radial-gradient(circle at 28% 24%, rgba(255, 255, 255, 0.34), transparent 24%),
    linear-gradient(135deg, #7c3aed, #2563eb);
}

.game-chip:nth-child(4n + 4) img {
  background:
    radial-gradient(circle at 28% 24%, rgba(255, 255, 255, 0.34), transparent 24%),
    linear-gradient(135deg, #f59e0b, #ef4444);
}

.game-chip em {
  min-width: 0;
  overflow: hidden;
  color: #475569;
  font-size: 12px;
  font-style: normal;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@keyframes gameMarquee {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(calc(-50% - 3px));
  }
}

@media (prefers-reduced-motion: reduce) {
  .game-marquee-track {
    animation: none;
  }
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  max-width: 100%;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 900;
  cursor: pointer;
  transition: transform 0.16s ease, background 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

.button[hidden] {
  display: none;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  color: #ffffff;
  background: linear-gradient(135deg, var(--blue), #1d4ed8);
  box-shadow: 0 16px 36px rgba(37, 99, 235, 0.26);
}

.button.primary:hover {
  box-shadow: 0 20px 42px rgba(37, 99, 235, 0.32);
}

.button.secondary,
.button.ghost {
  color: #1f3b6d;
  background: rgba(255, 255, 255, 0.86);
  border-color: var(--line);
}

.promo-actions #reviewJumpButton,
.promo-actions #tutorialJumpButton {
  color: #174bbf;
  background: rgba(239, 246, 255, 0.92);
  border-color: rgba(147, 197, 253, 0.92);
}

.promo-actions #reviewJumpButton {
  min-height: 52px;
}

.button.contact {
  color: #0f766e;
  background: rgba(236, 253, 245, 0.94);
  border-color: rgba(20, 184, 166, 0.38);
}

.button.contact:hover {
  border-color: rgba(15, 118, 110, 0.48);
  box-shadow: 0 14px 32px rgba(20, 184, 166, 0.16);
}

.button.wide {
  width: 100%;
}

.feature-strip {
  position: relative;
  top: auto;
  left: auto;
  z-index: 3;
  grid-column: 2;
  grid-row: 1;
  width: 100%;
  transform: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
  border: 1px solid rgba(191, 219, 254, 0.88);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.feature-strip::before {
  content: "";
  position: absolute;
  top: 34px;
  bottom: 34px;
  left: 45px;
  width: 2px;
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.18), rgba(16, 163, 127, 0.28), rgba(245, 158, 11, 0.22));
}

.feature-strip article {
  position: relative;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  min-height: 106px;
  min-width: 0;
  padding: 14px 14px 14px 0;
  border: 1px solid rgba(219, 231, 247, 0.86);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 14px 38px rgba(37, 99, 235, 0.08);
}

.feature-strip span {
  position: relative;
  z-index: 1;
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  margin-left: 8px;
  border: 1px solid #cfe0fb;
  border-radius: 50%;
  background: #ffffff;
  color: var(--blue);
  font-size: 20px;
  font-weight: 900;
  box-shadow: 0 10px 26px rgba(37, 99, 235, 0.12);
}

.feature-strip article:nth-child(2) span {
  color: var(--green);
}

.feature-strip article:nth-child(3) span {
  color: var(--purple);
}

.feature-strip article:nth-child(4) span {
  color: var(--orange);
}

.feature-strip h2 {
  grid-column: 2;
  margin: 0 0 6px;
  font-size: 21px;
  min-width: 0;
}

.feature-strip p {
  grid-column: 2;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.58;
  min-width: 0;
  overflow-wrap: anywhere;
}

.promo-video-frame {
  grid-column: 3;
  grid-row: 1;
  align-self: center;
  justify-self: center;
  width: clamp(250px, 19vw, 320px);
  aspect-ratio: 9 / 16;
  padding: 10px;
  overflow: hidden;
  border: 1px solid rgba(191, 219, 254, 0.9);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(239, 246, 255, 0.94)),
    #ffffff;
  box-shadow: 0 30px 90px rgba(37, 99, 235, 0.18);
  scroll-margin-top: 96px;
}

.promo-video-frame video {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 6px;
  background: #eaf2ff;
  object-fit: cover;
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 96px 28px;
}

.video-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(300px, 430px);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

#reviews {
  scroll-margin-top: 136px;
  outline: none;
}

#download {
  scroll-margin-top: 136px;
}

.section-copy h2,
.download-inner h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 46px);
  line-height: 1.18;
}

.section-copy p:not(.eyebrow),
.download-inner p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
}

.video-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(207, 224, 251, 0.96);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--shadow);
}

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

.review-video-frame {
  width: min(100%, 430px);
  justify-self: center;
  padding: 10px;
}

.review-video-frame video {
  border-radius: 6px;
  aspect-ratio: 9 / 16;
}

.review-video-play {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 3;
  display: inline-grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.92);
  box-shadow: 0 18px 42px rgba(37, 99, 235, 0.36);
  cursor: pointer;
  transform: translate(-50%, -50%);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s ease;
}

.review-video-play span {
  width: 0;
  height: 0;
  margin-left: 5px;
  border-top: 15px solid transparent;
  border-bottom: 15px solid transparent;
  border-left: 22px solid #ffffff;
}

.review-video-frame.is-playing .review-video-play {
  visibility: hidden;
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.9);
}

.review-video-controls {
  position: absolute;
  right: 18px;
  bottom: 18px;
  left: 18px;
  z-index: 3;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 10px;
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.08), rgba(15, 23, 42, 0.78));
  color: #ffffff;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.16s ease;
}

.review-video-frame.is-ready .review-video-controls,
.review-video-frame.is-playing .review-video-controls {
  opacity: 1;
  pointer-events: auto;
}

.review-video-toggle {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.94);
  cursor: pointer;
}

.review-video-toggle span {
  width: 0;
  height: 0;
  margin-left: 3px;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-left: 12px solid #1d4ed8;
}

.review-video-toggle.is-playing span {
  position: relative;
  width: 13px;
  height: 16px;
  margin-left: 0;
  border: 0;
}

.review-video-toggle.is-playing span::before,
.review-video-toggle.is-playing span::after {
  content: "";
  position: absolute;
  top: 0;
  width: 4px;
  height: 16px;
  border-radius: 2px;
  background: #1d4ed8;
}

.review-video-toggle.is-playing span::before {
  left: 1px;
}

.review-video-toggle.is-playing span::after {
  right: 1px;
}

.review-video-progress {
  position: relative;
  height: 6px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.34);
  cursor: pointer;
}

.review-video-progress span {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: #ffffff;
}

.review-video-time {
  min-width: 64px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 12px;
  font-weight: 800;
  text-align: right;
  white-space: nowrap;
}

.download-section {
  padding: 88px 28px;
  background:
    radial-gradient(circle at 18% 20%, rgba(37, 99, 235, 0.1), transparent 24%),
    linear-gradient(135deg, #f8fbff, #eef6ff);
}

.download-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 44px;
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
}

.download-panel {
  display: grid;
  gap: 12px;
  padding: 24px;
  border: 1px solid rgba(191, 219, 254, 0.92);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.version-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 8px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--blue-dark);
  font-weight: 900;
}

.download-panel small {
  color: var(--muted);
  text-align: center;
}

.site-footer {
  justify-content: space-between;
  gap: 20px;
  padding: 28px 6vw;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: #ffffff;
}

@media (max-width: 1180px) {
  .promo-section {
    grid-template-columns: minmax(0, 430px) minmax(0, 480px);
    column-gap: 28px;
    row-gap: 20px;
  }

  .promo-content {
    grid-column: 1;
    grid-row: 1;
  }

  .feature-strip {
    position: relative;
    top: auto;
    left: auto;
    width: 100%;
    transform: none;
    grid-column: 2;
    grid-row: 1;
  }
}

@media (max-width: 900px) {
  .site-header {
    padding: 0 20px;
  }

  .nav-links {
    display: none;
  }

  .promo-section {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 54px 24px 44px;
  }

  .feature-strip,
  .promo-content {
    grid-column: auto;
    grid-row: auto;
    max-width: 100%;
  }

  .promo-content {
    order: 1;
    width: 100%;
  }

  .feature-strip {
    order: 2;
    width: 100%;
  }

  .video-section,
  .download-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  :root {
    --page-gutter: 18px;
  }

  .site-header {
    min-height: 62px;
  }

  .announcement-bar {
    top: 62px;
    padding: 8px var(--page-gutter);
  }

  .announcement-inner {
    display: grid;
    grid-template-columns: auto auto minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    font-size: 13px;
  }

  .announcement-inner span:last-child {
    grid-column: auto;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .header-action {
    display: none;
  }

  .promo-section {
    padding: 44px 18px 38px;
  }

  .promo-content h1 {
    font-size: 78px;
  }

  .promo-copy {
    font-size: 17px;
    word-break: break-all;
  }

  .button {
    width: 100%;
  }

  .promo-actions {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .promo-actions .button {
    min-height: 54px;
  }

  .game-marquee {
    width: 100%;
    margin-top: 20px;
  }

  .game-chip {
    grid-template-columns: 32px 62px;
    min-width: 104px;
  }

  .game-chip img {
    width: 32px;
    height: 32px;
  }

  .feature-strip {
    padding: 12px;
  }

  .feature-strip::before {
    left: 45px;
  }

  .feature-strip article {
    width: 100%;
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 12px;
    min-height: 112px;
    padding: 14px 14px 14px 0;
  }

  .feature-strip span {
    width: 50px;
    height: 50px;
    font-size: 19px;
  }

  .feature-strip p {
    word-break: break-all;
  }

  .section,
  .download-section {
    padding: 60px 18px;
  }

  .video-section {
    gap: 26px;
  }

  .download-panel {
    padding: 18px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}