:root {
  --bg: #050812;
  --panel: rgba(18, 24, 48, .76);
  --panel-strong: rgba(30, 42, 82, .92);
  --text: #eef5ff;
  --muted: #9fb2d9;
  --line: rgba(122, 174, 255, .22);
  --brand: #5ddcff;
  --brand-2: #a855f7;
  --brand-3: #22f5c8;
  --shadow: 0 24px 70px rgba(0, 0, 0, .38);
  --radius: 24px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at top left, rgba(93, 220, 255, .18), transparent 30%), radial-gradient(circle at 80% 10%, rgba(168, 85, 247, .22), transparent 28%), var(--bg);
  color: var(--text);
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input { font: inherit; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(5, 8, 18, .82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.top-nav {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 18px 20px 10px;
}
.brand-mark { display: inline-flex; align-items: center; gap: 10px; min-width: max-content; }
.brand-mark strong { font-size: 28px; letter-spacing: .08em; }
.brand-mark em { color: var(--muted); font-style: normal; font-size: 13px; }
.brand-orb {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 0 28px rgba(93, 220, 255, .86);
}
.nav-links { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.nav-links a {
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
  transition: .25s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); border-color: var(--line); background: rgba(93, 220, 255, .08); }
.nav-toggle { display: none; }
.search-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px 16px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}
.search-shell input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 13px 16px;
  color: var(--text);
  background: rgba(255,255,255,.06);
  outline: none;
}
.search-shell button, .btn {
  border: 0;
  border-radius: 16px;
  padding: 13px 20px;
  color: #03111f;
  background: linear-gradient(135deg, var(--brand), var(--brand-3));
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 14px 36px rgba(93, 220, 255, .2);
}
.search-shell p { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: 14px; }
.hero, .page-hero, .section, .site-footer { max-width: 1180px; margin: 0 auto; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
  gap: 36px;
  align-items: center;
  min-height: 650px;
  padding: 64px 20px;
}
.eyebrow, .section-heading p, .page-hero p:first-child, .contact-band > div > p:first-child {
  color: var(--brand-3);
  letter-spacing: .12em;
  text-transform: uppercase;
  font-size: 13px;
  font-weight: 800;
}
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(38px, 6vw, 76px); line-height: 1.05; margin-bottom: 24px; }
h2 { font-size: clamp(28px, 4vw, 46px); line-height: 1.15; }
h3 { font-size: 21px; }
.hero-text, .page-hero > p:last-child, .section-heading span { color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.btn.ghost { color: var(--text); background: rgba(255,255,255,.06); border: 1px solid var(--line); box-shadow: none; }
.hero-visual, .video-card figure, .feature-card img {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}
.hero-visual { position: relative; }
figcaption { padding: 10px 14px; color: var(--muted); font-size: 13px; }
.section { padding: 64px 20px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.section-heading h2 { max-width: 760px; margin-bottom: 0; }
.video-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.video-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.03));
  overflow: hidden;
  box-shadow: var(--shadow);
}
.video-card figure { position: relative; margin: 0; border-radius: var(--radius) var(--radius) 0 0; box-shadow: none; }
.video-card video { position: absolute; inset: 0; width: 100%; height: calc(100% - 43px); object-fit: cover; opacity: 0; pointer-events: none; }
.play-badge {
  position: absolute;
  left: 50%;
  top: 46%;
  transform: translate(-50%, -50%) scale(.92);
  width: 68px;
  height: 68px;
  border: 1px solid rgba(255,255,255,.45);
  border-radius: 999px;
  background: rgba(5, 8, 18, .72);
  color: var(--text);
  opacity: 0;
  transition: .25s ease;
  cursor: pointer;
}
.video-card:hover .play-badge, .video-card.is-playing .play-badge { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.video-card.is-playing figure::after {
  content: "17c视频演示播放中";
  position: absolute;
  right: 14px;
  top: 14px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(34,245,200,.16);
  color: var(--brand-3);
  font-size: 12px;
}
.video-body { padding: 18px; }
.video-body p, .feature-card p, .glass-card p, .case-card p, .quote-card p, .news-list p { color: var(--muted); }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.tag-row span, .case-card span {
  display: inline-flex;
  padding: 5px 9px;
  border-radius: 999px;
  background: rgba(93, 220, 255, .1);
  color: var(--brand);
  font-size: 12px;
}
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 0; }
.metrics div { border-top: 1px solid var(--line); padding-top: 10px; }
.metrics dt { color: var(--muted); font-size: 12px; }
.metrics dd { margin: 0; font-weight: 900; }
.card-grid { display: grid; gap: 22px; }
.card-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card-grid.two, .code-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); display: grid; gap: 22px; }
.feature-card, .glass-card, .case-card, .quote-card, .news-list article, .related-card, .faq-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 22px;
}
.feature-card img { margin: -8px 0 18px; box-shadow: none; }
.feature-card strong { color: var(--brand-3); }
.split { display: grid; grid-template-columns: .8fr 1.2fr; gap: 28px; align-items: start; }
.timeline { display: grid; gap: 16px; }
.timeline article { padding: 22px; border-left: 3px solid var(--brand); background: rgba(255,255,255,.05); border-radius: 18px; }
.process-list { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: step; }
.process-list li { position: relative; padding: 24px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--panel-strong); }
.process-list li::before { counter-increment: step; content: "0" counter(step); display: block; color: var(--brand); font-size: 28px; font-weight: 900; }
.process-list span { color: var(--muted); display: block; margin-top: 8px; }
.news-list { display: grid; gap: 16px; }
.news-list time { color: var(--brand-3); font-size: 13px; }
.quote-card { margin: 0; }
.quote-card footer { color: var(--brand); }
.faq-list { display: grid; gap: 12px; }
.faq-list summary { cursor: pointer; font-weight: 800; }
.faq-list p { color: var(--muted); }
.contact-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border: 1px solid var(--line);
  border-radius: 32px;
  background: linear-gradient(135deg, rgba(93,220,255,.14), rgba(168,85,247,.16));
}
.page-hero { padding: 54px 20px 30px; }
.breadcrumb { max-width: 1180px; margin: 0 auto; padding: 24px 20px 0; color: var(--muted); display: flex; gap: 8px; flex-wrap: wrap; }
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.related-card { display: flex; justify-content: space-between; align-items: center; color: var(--text); }
.related-card span { color: var(--brand); font-size: 13px; }
pre { white-space: pre-wrap; word-break: break-word; color: #dce9ff; background: rgba(0,0,0,.22); border-radius: 16px; padding: 14px; overflow: auto; }
.site-footer { padding: 46px 20px 56px; }
.footer-grid { display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 22px; border-top: 1px solid var(--line); padding-top: 28px; color: var(--muted); }
.footer-grid h2 { font-size: 20px; color: var(--text); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
@media (max-width: 980px) {
  .hero, .split { grid-template-columns: 1fr; min-height: auto; }
  .video-grid, .card-grid.four, .card-grid.three, .card-grid.two, .code-grid, .process-list, .related-grid, .footer-grid { grid-template-columns: 1fr 1fr; }
  .section-heading { display: block; }
}
@media (max-width: 720px) {
  .top-nav { align-items: flex-start; }
  .nav-toggle { display: inline-flex; border: 1px solid var(--line); border-radius: 12px; padding: 8px 10px; color: var(--text); background: rgba(255,255,255,.06); }
  .nav-links { display: none; width: 100%; }
  .nav-links.open { display: grid; grid-template-columns: 1fr; }
  .top-nav { flex-wrap: wrap; }
  .search-shell { grid-template-columns: 1fr; }
  .hero { padding-top: 36px; }
  .video-grid, .card-grid.four, .card-grid.three, .card-grid.two, .code-grid, .process-list, .related-grid, .footer-grid { grid-template-columns: 1fr; }
  .contact-band { display: block; }
  h1 { font-size: 38px; }
}