:root {
  color-scheme: dark;
  --bg: #080d17;
  --surface: #101a2b;
  --surface-2: #14243a;
  --text: #eef7ff;
  --muted: #91a9bd;
  --cyan: #5de4df;
  --blue: #5e8cff;
  --line: rgba(158, 201, 230, 0.16);
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  background: var(--bg);
}
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 12% 10%, rgba(94, 140, 255, 0.18), transparent 30rem),
    radial-gradient(circle at 88% 14%, rgba(93, 228, 223, 0.13), transparent 26rem),
    linear-gradient(90deg, rgba(4, 8, 15, 0.62) 0%, rgba(4, 8, 15, 0.28) 56%, rgba(4, 8, 15, 0.52) 100%),
    linear-gradient(180deg, rgba(8, 13, 23, 0.06) 0%, rgba(8, 13, 23, 0.52) 54rem, rgba(8, 13, 23, 0.92) 92rem),
    url("/assets/stella-sora-background.jpg");
  background-position: center, center, center, center, center top;
  background-repeat: no-repeat;
  background-size: auto, auto, auto, auto, cover;
  background-attachment: fixed;
  font-family: Inter, "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif;
}

a { color: inherit; text-decoration: none; }
.nav {
  width: min(1160px, calc(100% - 40px));
  height: 72px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { font-size: 20px; font-weight: 800; letter-spacing: .08em; }
.nav nav { display: flex; gap: 26px; color: var(--muted); font-size: 14px; }
.nav nav a:hover { color: var(--text); }
main { width: min(1160px, calc(100% - 40px)); margin: auto; }
.hero {
  min-height: 640px;
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  align-items: center;
  gap: 72px;
  padding: 80px 0;
}
.eyebrow { margin: 0 0 14px; color: var(--cyan); letter-spacing: .16em; font-size: 12px; font-weight: 800; }
h1 { max-width: 780px; margin: 0; font-size: clamp(44px, 6vw, 76px); line-height: 1.08; letter-spacing: -.04em; }
h2 { margin: 0 0 30px; font-size: clamp(30px, 4vw, 48px); letter-spacing: -.03em; }
h3 { margin: 8px 0 10px; font-size: 19px; }
.lead { max-width: 720px; margin: 28px 0; color: #b8c9d8; line-height: 1.85; font-size: 17px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 10px; font-weight: 700; }
.primary { color: #071019; background: linear-gradient(135deg, var(--cyan), #7bb9ff); }
.secondary { border: 1px solid var(--line); background: rgba(255,255,255,.03); }
.button:hover { transform: translateY(-1px); filter: brightness(1.06); }
.micro { margin-top: 18px; color: #698299; font-size: 12px; }
.status-card, .panel {
  border: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(20,36,58,.92), rgba(12,22,36,.92));
  box-shadow: 0 24px 70px rgba(0,0,0,.25);
}
.status-card { padding: 28px; border-radius: 18px; }
.dot { display: inline-block; width: 9px; height: 9px; margin-right: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 16px var(--cyan); }
.status-label { color: #d5ecf4; font-weight: 700; }
dl { margin: 26px 0 0; }
dl div { display: flex; justify-content: space-between; padding: 13px 0; border-top: 1px solid var(--line); }
dt { color: var(--muted); }
dd { margin: 0; font-weight: 700; }
.release-notes { margin-bottom: 0; color: var(--muted); line-height: 1.7; font-size: 13px; }
.section { padding: 100px 0; border-top: 1px solid var(--line); }
.grid { display: grid; gap: 18px; }
.three { grid-template-columns: repeat(3, 1fr); }
.two { grid-template-columns: repeat(2, 1fr); }
.panel { padding: 26px; border-radius: 16px; }
.panel p { margin: 0; color: var(--muted); line-height: 1.75; }
.number { color: var(--cyan); font-family: ui-monospace, monospace; font-size: 13px; }
code { padding: .15em .4em; color: #b8fff9; background: rgba(93,228,223,.08); border-radius: 5px; }
.split { display: grid; grid-template-columns: .7fr 1.3fr; gap: 80px; }
.steps { margin: 0; padding: 0; list-style: none; }
.steps li { display: flex; gap: 18px; padding: 20px 0; border-top: 1px solid var(--line); }
.steps li > span { flex: 0 0 36px; height: 36px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--cyan); }
.steps strong { display: block; margin: 2px 0 8px; }
.steps p { margin: 0; color: var(--muted); line-height: 1.65; }
.warning { margin: 30px 0 100px; padding: 24px 28px; border: 1px solid rgba(255,187,92,.32); border-radius: 14px; background: rgba(255,166,62,.06); }
.warning strong { color: #ffd29a; }
.warning p { margin: 8px 0 0; color: #c6b79e; line-height: 1.7; }
footer { width: min(1160px, calc(100% - 40px)); margin: auto; padding: 28px 0 42px; display: flex; justify-content: space-between; color: #63788b; border-top: 1px solid var(--line); font-size: 12px; }

@media (max-width: 820px) {
  .nav nav { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 38px; padding: 72px 0; }
  .three, .two, .split { grid-template-columns: 1fr; }
  .split { gap: 24px; }
  .section { padding: 72px 0; }
  footer { gap: 14px; flex-direction: column; }
}