:root {
  color-scheme: dark;
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  background: #0b0f14;
  color: #edf6ff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 0%, rgba(0, 174, 236, .18), transparent 34rem),
    radial-gradient(circle at 95% 20%, rgba(251, 114, 153, .12), transparent 30rem),
    #0b0f14;
}

a { color: inherit; }
.shell { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding: 56px 0 36px; }
.hero {
  padding: clamp(26px, 5vw, 54px);
  border: 1px solid #253241;
  border-radius: 28px;
  background: rgba(16, 21, 28, .9);
  box-shadow: 0 28px 80px rgba(0, 0, 0, .32);
}
.eyebrow, .badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  color: #69d5ff;
  background: rgba(0, 174, 236, .12);
  border: 1px solid rgba(0, 174, 236, .35);
  padding: 6px 11px;
  font-size: 13px;
  font-weight: 700;
}
.brand-row { display: flex; align-items: center; gap: 22px; margin-top: 24px; }
.logo {
  display: grid;
  place-items: center;
  flex: 0 0 78px;
  height: 78px;
  border-radius: 22px;
  background: linear-gradient(145deg, #00aeec, #0077cc);
  color: white;
  font-size: 42px;
  font-weight: 900;
  box-shadow: 0 14px 38px rgba(0, 174, 236, .32);
}
h1 { margin: 0; font-size: clamp(34px, 6vw, 58px); letter-spacing: -.04em; }
.hero p { margin: 12px 0 0; color: #aebdca; font-size: 17px; line-height: 1.7; }
.quick-nav { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.quick-nav a {
  text-decoration: none;
  border-radius: 12px;
  padding: 10px 14px;
  color: #c9d7e3;
  border: 1px solid #2a3948;
  background: #111821;
}
.quick-nav a:hover, .quick-nav a:focus-visible { border-color: #00aeec; color: white; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 22px; }
.card {
  display: flex;
  flex-direction: column;
  min-height: 470px;
  padding: 24px;
  border-radius: 24px;
  border: 1px solid #263443;
  background: rgba(17, 24, 33, .94);
}
.card.recommended { border-color: rgba(0, 174, 236, .62); }
.card-heading { display: flex; align-items: center; gap: 14px; }
.number {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: #1b2936;
  color: #75dcff;
  font-weight: 900;
}
.badge { padding: 3px 8px; font-size: 11px; }
.badge.neutral { color: #ffd0dd; background: rgba(251, 114, 153, .1); border-color: rgba(251, 114, 153, .28); }
h2 { margin: 6px 0 0; font-size: 24px; }
.card > p { color: #aebdca; line-height: 1.75; }
.meta { margin: auto 0 18px; color: #8293a2; font-size: 13px; }
.button-row { display: grid; gap: 10px; }
.button {
  display: block;
  width: 100%;
  min-height: 48px;
  border: 0;
  border-radius: 14px;
  padding: 13px 16px;
  text-align: center;
  text-decoration: none;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
.button.primary { color: #07131a; background: linear-gradient(135deg, #28c8ff, #00aeec); }
.button.secondary { color: #dceaf5; background: #1b2631; border: 1px solid #334555; }
.button:hover { filter: brightness(1.08); }
.button:focus-visible, summary:focus-visible, a:focus-visible { outline: 3px solid rgba(105, 213, 255, .55); outline-offset: 3px; }
details { margin-top: 15px; border-top: 1px solid #263443; padding-top: 15px; color: #b8c6d2; }
summary { cursor: pointer; font-weight: 750; color: #e8f4fc; }
ol { padding-left: 21px; line-height: 1.75; }
.status { min-height: 24px; margin: 9px 0 0 !important; color: #75dcff !important; font-size: 14px; }
.notice {
  margin-top: 22px;
  padding: 24px 28px;
  border: 1px solid #2a3948;
  border-radius: 20px;
  background: rgba(17, 24, 33, .86);
}
.notice h2 { margin-top: 0; }
.notice p { margin-bottom: 0; color: #aebdca; line-height: 1.8; }
footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 4px 0;
  color: #8393a1;
  font-size: 14px;
}
footer a { color: #77d9ff; }

@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .card { min-height: auto; }
  .meta { margin-top: 18px; }
}
@media (max-width: 560px) {
  .shell { width: min(100% - 20px, 1120px); padding-top: 16px; }
  .hero { border-radius: 20px; padding: 22px; }
  .brand-row { align-items: flex-start; gap: 14px; }
  .logo { flex-basis: 56px; height: 56px; border-radius: 16px; font-size: 30px; }
  h1 { font-size: 31px; }
  .cards { gap: 12px; }
  .card { padding: 20px; border-radius: 20px; }
  footer { flex-direction: column; }
}