:root {
  color-scheme: dark;
  --bg: #060d17;
  --panel: #0d1829;
  --panel-2: #111d30;
  --line: rgba(143, 173, 211, .15);
  --text: #edf5ff;
  --muted: #93a5bd;
  --dim: #64748b;
  --cyan: #26c9e8;
  --cyan-soft: #a5eff6;
  --font: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--bg); }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  font-family: var(--font);
  background:
    radial-gradient(circle at 50% -18%, rgba(28, 115, 162, .13), transparent 35%),
    linear-gradient(180deg, #07101b 0%, #060d17 100%);
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
.ambient {
  position: fixed;
  z-index: -1;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  filter: blur(100px);
  opacity: .1;
  pointer-events: none;
}
.ambient-a { top: 18%; left: -260px; background: #1abbd5; }
.ambient-b { right: -280px; bottom: 5%; background: #345cd9; }
.page {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  padding: 34px 0 42px;
}
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: inline-flex; align-items: center; }
.brand img {
  display: block;
  width: 238px;
  height: 52px;
  object-fit: contain;
  object-position: left center;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 15px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  transition: .2s ease;
}
.back-link:hover { color: var(--cyan-soft); border-color: rgba(38, 201, 232, .36); }
.intro { padding: 52px 20px 44px; text-align: center; }
.eyebrow {
  color: var(--cyan);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .22em;
}
.intro h1 {
  margin: 13px 0 13px;
  font-size: clamp(34px, 4.5vw, 53px);
  line-height: 1.16;
  letter-spacing: -.035em;
}
.intro h1 span {
  color: transparent;
  background: linear-gradient(100deg, #f2fbff 0%, #9beaf3 68%, #5ecfe5 100%);
  background-clip: text;
  -webkit-background-clip: text;
}
.tagline {
  margin: 0;
  color: #9eb0c7;
  font-size: 18px;
  letter-spacing: .01em;
}
.tagline-en {
  margin: 8px 0 0;
  color: #64748b;
  font-size: 13px;
  font-weight: 600;
}
.video-shell {
  overflow: hidden;
  border: 1px solid rgba(128, 162, 201, .22);
  border-radius: 22px;
  background: #03070c;
  box-shadow: 0 32px 90px rgba(0, 0, 0, .42), 0 0 0 1px rgba(19, 211, 229, .025);
}
.video-shell video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #02060a;
  object-fit: contain;
}
.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 58px;
  gap: 20px;
  padding: 0 24px;
  color: #7f93ac;
  border-top: 1px solid rgba(128, 162, 201, .13);
  background: #0b1627;
  font-size: 12px;
}
.video-meta span { display: inline-flex; align-items: center; gap: 8px; }
.video-meta i { font-style: normal; }
svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin: 36px 0 44px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 52px;
  padding: 0 25px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 800;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.button span { font-weight: 700; }
.button.primary {
  color: #03151c;
  background: linear-gradient(135deg, #1cc2df, #39d0de);
  box-shadow: 0 16px 35px rgba(23, 188, 218, .16);
}
.button.secondary {
  color: #dce8f6;
  border: 1px solid var(--line);
  background: rgba(11, 22, 38, .72);
}
.button:hover { transform: translateY(-2px); }
.button.secondary:hover { border-color: rgba(38, 201, 232, .34); }
.details { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.info-card {
  min-height: 232px;
  padding: 29px 32px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(17, 31, 51, .91), rgba(11, 24, 41, .92));
}
.card-title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 17px;
  color: var(--cyan);
}
.card-title h2 { margin: 0; font-size: 16px; }
.card-title span {
  margin-left: 2px;
  padding: 3px 8px;
  color: #45cbe2;
  border-radius: 5px;
  background: rgba(38, 201, 232, .1);
  font-size: 9px;
  font-weight: 800;
}
.info-card p {
  margin: 0;
  color: #aab9cc;
  font-size: 13px;
  line-height: 1.85;
}
.info-card p + p { margin-top: 10px; }
.info-card b { color: #e8f1fc; }
.info-card .english { color: #6f8199; }
.info-card .website { margin-top: 17px; color: #8397af; }
.website a { color: #36c9e3; text-decoration: underline; text-underline-offset: 3px; }
footer {
  margin-top: 54px;
  padding-top: 30px;
  color: #667a93;
  border-top: 1px solid var(--line);
  text-align: center;
}
footer p { margin: 0; font-size: 11px; }
footer p + p { margin-top: 12px; color: #4f6075; }

@media (max-width: 760px) {
  .page { width: min(100% - 28px, 1120px); padding: 17px 0 28px; }
  .brand img { width: 178px; height: 44px; }
  .back-link { min-height: 38px; padding: 0 12px; font-size: 10px; }
  .intro { padding: 39px 10px 29px; }
  .intro h1 { margin: 10px 0 11px; font-size: clamp(30px, 9vw, 39px); }
  .tagline { font-size: 15px; }
  .tagline-en { font-size: 11px; line-height: 1.5; }
  .video-shell { border-radius: 14px; }
  .video-meta {
    min-height: 66px;
    padding: 11px 14px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    font-size: 10px;
  }
  .actions { display: grid; grid-template-columns: 1fr; gap: 10px; margin: 24px 0 32px; }
  .button { width: 100%; min-height: 50px; }
  .details { grid-template-columns: 1fr; gap: 12px; }
  .info-card { min-height: auto; padding: 23px 21px; border-radius: 15px; }
  .card-title { margin-bottom: 13px; }
  .info-card p { font-size: 12px; }
  footer { margin-top: 38px; padding-top: 24px; }
  footer p { font-size: 10px; line-height: 1.65; }
}

@media (max-width: 390px) {
  .page { width: calc(100% - 20px); }
  .brand img { width: 153px; }
  .back-link { padding: 0 10px; }
  .intro { padding-top: 32px; }
  .video-meta i { display: none; }
}

@media (hover: hover) and (pointer: fine) {
  .button:hover { transform: translateY(-2px); }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}