:root {
  --black: #000;
  --panel: #0a0a0d;
  --ink: #f5f5f7;
  --grey: #86868b;
  --line: rgba(255, 255, 255, 0.1);
  --link: #2997ff;
  --shell: 980px;
  --measure: 692px;
  color-scheme: dark;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
          "Helvetica Neue", "Segoe UI", system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.5;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { display: block; max-width: 100%; height: auto; }

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── chrome ─────────────────────────────────────────── */

.nav {
  position: sticky; top: 0; z-index: 20;
  height: 48px;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav-in {
  max-width: calc(var(--shell) + 44px); height: 100%; margin: 0 auto;
  padding: 0 22px;
  display: flex; align-items: center; gap: 14px;
}
.nav-mark { display: flex; align-items: center; gap: 9px; }
.nav-mark img { width: 20px; height: 20px; border-radius: 5px; }
.nav-name {
  text-transform: uppercase;   
  font-size: 14px; font-weight: 600; color: var(--ink);
  letter-spacing: -0.005em;
}
.nav-links { margin-left: auto; display: flex; gap: 22px; }
.nav-links a {
  font-size: 12px; color: var(--grey);
  padding: 15px 4px;
  margin: -15px -4px;
}
.nav-links a:hover { color: var(--ink); text-decoration: none; }

/* ── sections ───────────────────────────────────────── */

section { padding: clamp(72px, 11vw, 132px) 22px; }
.shell { max-width: var(--shell); margin: 0 auto; }
.measure { max-width: var(--measure); margin: 0 auto; }
.panel { background: var(--panel); }
.center { text-align: center; }

h1, h2, h3 { font-weight: 600; letter-spacing: -0.025em; line-height: 1.06; }

h1 { font-size: clamp(44px, 8.4vw, 84px); }
h2 { font-size: clamp(32px, 5.2vw, 52px); }
h3 { font-size: 22px; letter-spacing: -0.015em; line-height: 1.2; }

.lede {
  font-size: clamp(19px, 2.3vw, 26px);
  line-height: 1.35; letter-spacing: -0.015em;
  color: var(--grey); font-weight: 500;
}

.sub { color: var(--grey); font-size: 17px; line-height: 1.55; }

/* ── hero ───────────────────────────────────────────── */

.hero { padding-top: clamp(56px, 9vw, 96px); padding-bottom: 0; }
.hero-icon {
  width: clamp(112px, 17vw, 156px); aspect-ratio: 1;
  margin: 0 auto clamp(28px, 4vw, 40px);
  border-radius: 23%;
}
.hero h1 {
  text-transform: uppercase;   
  margin-bottom: 18px;
  letter-spacing: -0.005em;
}
.hero .lede { margin: 0 auto; max-width: 22ch; }

.hero-shot {
  margin: clamp(48px, 7vw, 84px) auto 0;
  width: 100%;
  max-width: 860px;
  border-radius: 18px;
  border: 1px solid var(--line);
  overflow: hidden;
}

/* ── feature grid ───────────────────────────────────── */

.grid {
  display: grid; gap: 20px;
  grid-template-columns: 1fr;
  margin-top: clamp(44px, 6vw, 68px);
}
@media (min-width: 600px) and (max-width: 899.98px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .grid .card:last-child { grid-column: 1 / -1; }
}
@media (min-width: 900px) {
  .grid { grid-template-columns: repeat(3, 1fr); }
}
.card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 30px 26px;
}
.chip { display: flex; gap: 5px; margin-bottom: 20px; }
.chip i { width: 13px; height: 13px; border-radius: 3.5px; display: block; }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--grey); font-size: 15px; line-height: 1.5; }

/* ── status note ────────────────────────────────────── */

.note {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 8px 16px 8px 13px;
  border: 1px solid var(--line); border-radius: 980px;
  color: var(--grey); font-size: 14px;
}
.dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: #30d158; flex: none;
}

/* ── footer ─────────────────────────────────────────── */

footer {
  background: var(--panel);
  border-top: 1px solid var(--line);
  padding: 34px 22px 46px;
  font-size: 12px; color: var(--grey);
}
footer .shell { display: flex; flex-wrap: wrap; gap: 12px 26px; align-items: center; }
footer a { color: var(--grey); }
footer a:hover { color: var(--ink); text-decoration: none; }
footer .spacer { margin-left: auto; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* 页脚字标:外观全大写,标记里是产品名 Neon Pop */
footer .shell span { text-transform: uppercase; }