:root {
  --bg: #09090b;
  --card: #141417;
  --ink: #f5f5f4;
  --muted: #a1a1aa;
  --dim: #71717a;
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.14);
  --violet: #8b5cf6;
  --coral: #f8645a;
  --teal: #22c7d6;
  --lime: #d9f84a;
  --radius: 24px;
  --sans: "Noto Sans SC", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  color-scheme: dark;
}

*,
*::before,
*::after { box-sizing: border-box; }

[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(900px 420px at 50% -10%, rgba(139, 92, 246, 0.18), transparent 60%),
    radial-gradient(600px 320px at 100% 20%, rgba(34, 199, 214, 0.08), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 50% 0%, #000 0%, transparent 75%);
}

h1, h2 { margin: 0; letter-spacing: -0.02em; line-height: 1.2; }
h1 { font-size: 1.8rem; }
h2 { font-size: 0.95rem; color: var(--muted); font-weight: 600; }
p { margin: 0; }
a { color: inherit; }
button, input { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--lime); outline-offset: 3px; }

.skip {
  position: absolute;
  left: 12px;
  top: -48px;
  background: var(--ink);
  color: var(--bg);
  padding: 8px 12px;
  border-radius: 10px;
}
.skip:focus { top: 12px; }

.top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  gap: 10px;
  align-items: center;
  text-decoration: none;
}
.brand span { display: flex; flex-direction: column; line-height: 1.15; }
.brand strong { font-size: 0.95rem; }
.brand em { font-style: normal; color: var(--dim); font-size: 0.78rem; }
.mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--lime);
  color: #111;
  font-weight: 700;
}

.nav { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.nav a, .linkish {
  color: var(--muted);
  text-decoration: none;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}
.nav a:hover, .linkish:hover { color: var(--ink); }

.wrap { width: min(960px, calc(100% - 32px)); margin: 28px auto 64px; }

.card {
  background: rgba(20, 20, 23, 0.92);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}
.narrow { width: min(460px, 100%); margin-inline: auto; }

.kicker {
  color: var(--teal);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.lede { color: var(--muted); margin: 10px 0 18px; }

form { display: grid; gap: 8px; margin-top: 8px; }
form + form { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); }
label { font-size: 0.86rem; color: var(--muted); }
label span { color: var(--dim); }
input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line-2);
  background: #101013;
}
button, .button {
  margin-top: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 0;
  background: var(--lime);
  color: #14140f;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
.button.secondary, button.secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-2);
}
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.actions .button { margin-top: 0; }

.switch { margin-top: 16px; color: var(--muted); }
.alert, .notice {
  padding: 10px 12px;
  border-radius: 12px;
  margin-bottom: 8px;
}
.alert { background: rgba(248, 100, 90, 0.12); color: #ffd0cc; }
.notice { background: rgba(217, 248, 74, 0.1); color: var(--lime); }

.facts { display: grid; gap: 10px; margin: 0 0 8px; }
.facts div { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.facts dt { color: var(--dim); }
.facts dd { margin: 0; text-align: right; }

.online-label { color: var(--dim); font-size: 0.85rem; }
.online {
  font-size: 3.2rem;
  line-height: 1;
  font-weight: 700;
  color: var(--lime);
  margin: 6px 0 18px;
}
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.stat {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.02);
}
.stat p { display: flex; justify-content: space-between; align-items: baseline; margin-top: 8px; }
.stat span { font-size: 1.35rem; font-weight: 700; }
.stat small { color: var(--dim); }
.note, .fine { color: var(--dim); font-size: 0.86rem; margin-top: 14px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: var(--muted); }

.hp {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

@media (max-width: 720px) {
  .top { align-items: flex-start; flex-direction: column; }
  .grid { grid-template-columns: 1fr; }
  .card { padding: 20px; }
}