:root {
  --bg: #071018;
  --bg-2: #0a1420;
  --panel: #101c2b;
  --line: rgba(180, 220, 240, 0.12);
  --text: #e8f1f7;
  --muted: #9bb0c4;
  --cyan: #2ee6c5;
  --cyan-deep: #12b89c;
  --cyan-glow: rgba(46, 230, 197, 0.28);
  --nav-h: 64px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Syne", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --stage: min(1440px, calc(100% - 32px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

/* ── Nav ── */
.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background 0.3s var(--ease), border-color 0.3s, backdrop-filter 0.3s;
  border-bottom: 1px solid transparent;
}
.site-nav.is-scrolled {
  background: rgba(7, 16, 24, 0.88);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--line);
}
.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 750;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}
.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, var(--cyan), #1a9fd4);
  color: #041018;
  font-size: 0.8rem;
  font-weight: 800;
  box-shadow: 0 0 24px var(--cyan-glow);
}
.nav-links { display: flex; gap: 4px; }
.nav-links a {
  padding: 8px 12px;
  color: var(--muted);
  font-size: 0.92rem;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav-cta { display: flex; gap: 10px; align-items: center; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.94rem;
  transition: transform 0.2s var(--ease), box-shadow 0.2s, background 0.2s, border-color 0.2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  color: #041018;
  background: linear-gradient(135deg, var(--cyan), var(--cyan-deep));
  box-shadow: 0 10px 28px var(--cyan-glow);
}
.btn-ghost {
  color: var(--text);
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.18);
}
.btn-ghost:hover { background: rgba(255,255,255,0.14); }
.btn-lg { padding: 13px 24px; font-size: 1rem; }

.kicker {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--cyan);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ── Full-width shot stage ── */
.shot-band {
  position: relative;
  padding: 28px 0 48px;
  background: var(--bg);
}
.shot-band.alt { background: var(--bg-2); }
.shot-band.hero-band {
  padding-top: calc(var(--nav-h) + 20px);
  padding-bottom: 40px;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.shot-stage {
  position: relative;
  width: var(--stage);
  margin: 0 auto;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.shot-stage.is-inview,
.shot-band.hero-band .shot-stage {
  opacity: 1;
  transform: none;
}

/* 显示器外框：几乎铺满横向 */
.screen-frame {
  position: relative;
  border-radius: 14px;
  background: linear-gradient(165deg, #2c3648, #121820 55%, #0c121a);
  padding: 14px 14px 18px;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow:
    0 40px 80px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(0, 0, 0, 0.4);
  transform: perspective(1800px) rotateX(2.5deg);
  transform-origin: center top;
}
.screen-bezel {
  border-radius: 8px;
  overflow: hidden;
  background: #05080e;
  line-height: 0;
  aspect-ratio: 16 / 9;
}
.screen-bezel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
}
.screen-chin {
  width: 28%;
  height: 6px;
  margin: 12px auto 0;
  border-radius: 999px;
  background: #1a222e;
  opacity: 0.85;
}

/* 半透明文字叠在图上 */
.shot-caption {
  position: absolute;
  left: 28px;
  right: 28px;
  bottom: 36px;
  z-index: 2;
  max-width: 560px;
  padding: 20px 22px 22px;
  border-radius: 16px;
  color: #f2f7fb;
  background: rgba(6, 12, 20, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}
.shot-caption.top {
  top: 28px;
  bottom: auto;
}
.shot-caption h1,
.shot-caption h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.15;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.45);
}
.shot-caption h1 {
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
}
.shot-caption h2 {
  font-size: clamp(1.35rem, 2.6vw, 1.9rem);
}
.shot-caption .brand-line {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.95;
}
.shot-caption p {
  margin: 0;
  color: rgba(230, 240, 248, 0.88);
  font-size: 0.98rem;
}
.shot-caption ul {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}
.shot-caption li {
  position: relative;
  padding-left: 14px;
  font-size: 0.92rem;
  color: rgba(230, 240, 248, 0.9);
}
.shot-caption li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}
.shot-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

/* Locate 营销图也全宽叠字 */
.promo-full {
  position: relative;
  width: var(--stage);
  margin: 0 auto;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 32px 70px rgba(0, 0, 0, 0.45);
  aspect-ratio: 16 / 9;
  background: #0a1018;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.promo-full.is-inview {
  opacity: 1;
  transform: none;
}
.promo-full img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.promo-full .shot-caption {
  left: 24px;
  right: auto;
  bottom: 24px;
  max-width: 420px;
}

/* Free / Download */
.free-wrap { padding: 8px 0 0; }
.free-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  border-radius: 14px;
  border: 1px solid rgba(46, 230, 197, 0.22);
  background: linear-gradient(120deg, rgba(46, 230, 197, 0.08), rgba(26, 159, 212, 0.06));
}
.free-bar h3 {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 1.15rem;
}
.free-bar p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.download {
  padding: 56px 0 88px;
}
.download-panel {
  text-align: center;
  padding: 52px 24px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background:
    radial-gradient(ellipse 55% 80% at 50% 0%, rgba(46, 230, 197, 0.16), transparent 60%),
    var(--panel);
}
.download-panel h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  letter-spacing: -0.03em;
}
.download-panel p {
  margin: 0 auto 26px;
  max-width: 32em;
  color: var(--muted);
}
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.download-note {
  margin-top: 16px;
  font-size: 0.86rem;
  color: rgba(138, 160, 181, 0.7);
}

.site-footer {
  padding: 24px 0 36px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
}
.site-footer a:hover { color: var(--cyan); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media (max-width: 980px) {
  .nav-links { display: none; }
  .screen-frame { transform: none; padding: 10px 10px 12px; }
  .shot-caption {
    left: 14px;
    right: 14px;
    bottom: 18px;
    max-width: none;
    padding: 16px;
  }
  .shot-caption.top { top: 14px; }
  .shot-caption ul { display: none; }
  .promo-full .shot-caption { right: 14px; max-width: none; }
}

@media (max-width: 560px) {
  .container { width: calc(100% - 28px); }
  --stage: calc(100% - 16px);
  .nav-cta .btn-ghost { display: none; }
  .shot-actions { flex-direction: column; align-items: stretch; }
  .shot-band { padding: 18px 0 28px; }
  .shot-band.hero-band { padding-top: calc(var(--nav-h) + 12px); min-height: auto; }
  .free-bar { padding: 18px; }
}