:root {
  color-scheme: dark;
  --ink: #edf8f8;
  --muted: #96afb2;
  --panel: #102326;
  --panel-2: #0b1c1f;
  --line: #244044;
  --teal: #51d2c3;
  --teal-soft: #a8eee5;
  --amber: #f0bd6a;
  --red: #ef8d86;
  --bg: #071416;
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(rgba(81, 210, 195, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(81, 210, 195, .035) 1px, transparent 1px),
    radial-gradient(circle at 70% 4%, rgba(54, 129, 123, .22), transparent 28rem),
    var(--bg);
  background-size: 48px 48px, 48px 48px, auto, auto;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  line-height: 1.6;
}

.shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 34px;
}

.masthead,
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.masthead {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 650;
  letter-spacing: .01em;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #06201e;
  background: var(--teal);
  border-radius: 9px 4px 9px 4px;
  font-weight: 800;
}

.environment {
  padding: 5px 10px;
  color: var(--amber);
  border: 1px solid rgba(240, 189, 106, .45);
  border-radius: 999px;
  font-size: .82rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  align-items: end;
  gap: 44px;
  padding: 84px 0 56px;
}

.signal {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  color: var(--teal-soft);
  font-size: .92rem;
}

.signal span {
  width: 9px;
  height: 9px;
  border: 2px solid var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(81, 210, 195, .08);
}

h1 {
  max-width: 700px;
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 5.7rem);
  font-weight: 720;
  letter-spacing: -.055em;
  line-height: .98;
}

.summary {
  max-width: 670px;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.7vw, 1.18rem);
}

.authority {
  display: flex;
  min-height: 170px;
  padding: 22px;
  flex-direction: column;
  justify-content: flex-end;
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  background: rgba(16, 35, 38, .78);
}

.authority-label,
.authority span:last-child {
  color: var(--muted);
  font-size: .82rem;
}

.authority strong {
  margin: 12px 0 2px;
  font-size: 1.8rem;
  font-weight: 680;
}

.status-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.status-strip div {
  display: flex;
  min-height: 96px;
  padding: 20px;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid var(--line);
}

.status-strip div:first-child { padding-left: 0; }
.status-strip div:last-child { border-right: 0; }
.status-strip span { color: var(--muted); font-size: .82rem; }
.status-strip strong { font-size: 1.04rem; font-weight: 650; }

.gates { padding: 64px 0 70px; }

.section-heading {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 28px;
}

h2 { margin: 0; font-size: 1.8rem; letter-spacing: -.025em; }
.section-heading p { margin: 0; color: var(--muted); }

ol { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }

li {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  min-height: 110px;
  border-bottom: 1px solid var(--line);
}

.gate-index { color: #557377; font-variant-numeric: tabular-nums; }
li strong { display: block; margin-bottom: 4px; font-size: 1.03rem; }
li p { margin: 0; color: var(--muted); font-size: .92rem; }
.gate-state { color: var(--muted); font-size: .86rem; }
li.complete .gate-index,
li.complete .gate-state { color: var(--teal); }

footer {
  padding-top: 22px;
  color: #637d80;
  border-top: 1px solid var(--line);
  font-size: .82rem;
}

@media (max-width: 720px) {
  .shell { width: min(100% - 28px, 1120px); }
  .hero { grid-template-columns: 1fr; padding: 58px 0 40px; }
  .authority { min-height: 130px; }
  .status-strip { grid-template-columns: 1fr 1fr; }
  .status-strip div { border-bottom: 1px solid var(--line); }
  .status-strip div:nth-child(2) { border-right: 0; }
  .status-strip div:nth-child(3), .status-strip div:nth-child(4) { border-bottom: 0; }
  .status-strip div:first-child { padding-left: 20px; }
  .section-heading { grid-template-columns: 1fr; gap: 10px; }
  li { grid-template-columns: 42px minmax(0, 1fr); padding: 18px 0; }
  .gate-state { grid-column: 2; }
}

@media (prefers-reduced-motion: no-preference) {
  .signal span { animation: pulse 2.8s ease-out infinite; }
  @keyframes pulse {
    0%, 45%, 100% { box-shadow: 0 0 0 5px rgba(81, 210, 195, .08); }
    20% { box-shadow: 0 0 0 10px rgba(81, 210, 195, 0); }
  }
}

:focus-visible { outline: 3px solid var(--teal); outline-offset: 4px; }