:root {
  color-scheme: dark;
  --page: #07111b;
  --panel: rgba(13, 25, 38, 0.94);
  --line: rgba(131, 157, 185, 0.22);
  --ink: #f2f7fb;
  --muted: #9caec2;
  --cyan: #66e6ff;
  font-family: Inter, "Noto Sans CJK SC", "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(8, 26, 42, 0.94), rgba(9, 12, 28, 0.98)),
    var(--page);
  color: var(--ink);
}

.portal-shell {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 28px;
}

.portal-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.85fr);
  gap: 36px;
  width: min(1120px, 100%);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(13, 25, 38, 0.96), rgba(12, 20, 35, 0.94)), var(--panel);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.35);
  padding: clamp(28px, 5vw, 56px);
}

.eyebrow {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  margin: 16px 0 18px;
  font-size: clamp(42px, 7vw, 80px);
  line-height: 1;
  letter-spacing: 0;
}

p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.portal-actions {
  display: grid;
  gap: 16px;
  align-content: center;
}

.portal-card {
  display: grid;
  gap: 8px;
  min-height: 142px;
  align-content: center;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(20, 34, 50, 0.86);
  color: var(--ink);
  padding: 24px;
  text-decoration: none;
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

.portal-card:hover {
  border-color: rgba(102, 230, 255, 0.62);
  box-shadow: 0 16px 38px rgba(16, 216, 255, 0.14);
  transform: translateY(-2px);
}

.portal-card.primary {
  border-color: rgba(102, 230, 255, 0.46);
}

.portal-card span {
  font-size: 30px;
  font-weight: 900;
}

.portal-card strong {
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 820px) {
  .portal-hero {
    grid-template-columns: 1fr;
  }
}