:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1d2433;
  --muted: #667085;
  --primary: #6c4dff;
  --primary-dark: #5036d6;
  --border: #e6e8ef;
  --ok: #0f8f57;
  --warning: #b45309;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: radial-gradient(circle at top, #ebe7ff 0, var(--bg) 38%, #ffffff 100%);
  color: var(--text);
  line-height: 1.6;
}

.header {
  padding: 34px 18px 22px;
  text-align: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(108, 77, 255, 0.12);
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 12px;
}

h1 {
  margin: 0;
  font-size: clamp(30px, 6vw, 48px);
  letter-spacing: -0.04em;
}

.subtitle {
  max-width: 720px;
  margin: 12px auto 0;
  color: var(--muted);
  font-size: 17px;
}

.container {
  width: min(980px, calc(100% - 28px));
  margin: 0 auto 48px;
}

.card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: 0 20px 60px rgba(35, 31, 80, 0.09);
  padding: clamp(20px, 4vw, 38px);
  margin-bottom: 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.link-card {
  display: block;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 18px;
  text-decoration: none;
  background: #fff;
  color: var(--text);
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.link-card:hover {
  transform: translateY(-2px);
  border-color: rgba(108, 77, 255, 0.45);
  box-shadow: 0 10px 26px rgba(35, 31, 80, 0.08);
}

.link-card strong {
  display: block;
  font-size: 18px;
  margin-bottom: 5px;
}

.link-card span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

h2 {
  margin: 28px 0 10px;
  font-size: 24px;
  letter-spacing: -0.02em;
}

h2:first-child {
  margin-top: 0;
}

h3 {
  margin: 22px 0 8px;
  font-size: 18px;
}

p {
  margin: 0 0 12px;
}

ul, ol {
  padding-left: 22px;
  margin: 8px 0 16px;
}

li {
  margin-bottom: 8px;
}

.notice {
  border-left: 4px solid var(--primary);
  background: rgba(108, 77, 255, 0.08);
  padding: 14px 16px;
  border-radius: 12px;
  margin: 16px 0;
}

.success {
  border-left-color: var(--ok);
  background: rgba(15, 143, 87, 0.08);
}

.warning {
  border-left-color: var(--warning);
  background: rgba(180, 83, 9, 0.08);
}

.meta {
  color: var(--muted);
  font-size: 14px;
  margin-top: 10px;
}

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  padding: 12px 18px 34px;
}

.footer a,
.card a {
  color: var(--primary-dark);
  font-weight: 700;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
}

.nav a {
  color: var(--primary-dark);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 9px 13px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

.code-box {
  display: inline-block;
  background: #f0f2f7;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px 7px;
  font-family: Consolas, Monaco, monospace;
  font-size: 0.95em;
}

@media (max-width: 720px) {
  .header {
    padding-top: 24px;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .container {
    width: min(100% - 18px, 980px);
    margin-bottom: 28px;
  }

  .card {
    border-radius: 18px;
  }
}