:root {
  color-scheme: light dark;
  --background: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.86);
  --text: #172033;
  --muted: #697386;
  --line: rgba(23, 32, 51, 0.1);
  --accent: #1677ff;
  --accent-strong: #005bd4;
  --shadow: 0 18px 55px rgba(29, 51, 84, 0.1);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 10%, rgba(22, 119, 255, 0.13), transparent 36rem),
    radial-gradient(circle at 85% 80%, rgba(69, 203, 157, 0.12), transparent 32rem),
    var(--background);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang TC", sans-serif;
  line-height: 1.6;
}

a { color: var(--accent-strong); }

.shell {
  width: min(1040px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0 40px;
}

.hero {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 28px 6px 48px;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 118px;
  height: 118px;
  overflow: hidden;
  color: white;
  background: linear-gradient(145deg, #173f7a, #1677ff);
  border-radius: 28px;
  box-shadow: var(--shadow);
  font: 700 30px/1 ui-monospace, "SFMono-Regular", Menlo, monospace;
}

.brand-mark .cloud {
  position: absolute;
  right: 9px;
  bottom: -6px;
  color: #dff5ff;
  font: 42px/1 sans-serif;
  opacity: 0.95;
}

.eyebrow, .label {
  margin: 0;
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

h1 {
  margin: 2px 0 4px;
  font-size: clamp(2.7rem, 7vw, 4.8rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

h2 { margin: 0 0 8px; line-height: 1.25; }
p { margin: 0; }
.lead { max-width: 650px; color: var(--muted); font-size: 1.12rem; }

.card {
  padding: 26px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.card p { color: var(--muted); }

.status-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}

.status-card h2 { font-size: 1.8rem; }

.button {
  flex: 0 0 auto;
  padding: 11px 17px;
  color: white;
  background: var(--accent);
  border-radius: 12px;
  font-weight: 650;
  text-decoration: none;
}

.button:hover { background: var(--accent-strong); }

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.grid .card { box-shadow: none; }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  padding: 28px 8px 0;
}

.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--accent); }

.document { max-width: 760px; }
.document h1 { margin-bottom: 20px; font-size: clamp(2.2rem, 6vw, 3.6rem); }
.document h2 { margin-top: 30px; }
.document p, .document li { color: var(--muted); }
.document .card { margin-top: 24px; }
.back-link { display: inline-block; margin-bottom: 30px; text-decoration: none; }

@media (max-width: 760px) {
  .shell { width: min(100% - 28px, 1040px); padding-top: 38px; }
  .hero { align-items: flex-start; flex-direction: column; }
  .brand-mark { width: 92px; height: 92px; border-radius: 23px; font-size: 24px; }
  .brand-mark .cloud { font-size: 34px; }
  .status-card { align-items: stretch; flex-direction: column; }
  .button { text-align: center; }
  .grid { grid-template-columns: 1fr; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #0d1118;
    --surface: rgba(24, 31, 43, 0.86);
    --text: #f1f5fb;
    --muted: #a4aec0;
    --line: rgba(255, 255, 255, 0.1);
    --accent: #4d9cff;
    --accent-strong: #8ec1ff;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.24);
  }
}