:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --border: #e3e6ec;
  --text: #14171f;
  --muted: #5c6474;
  --accent: #f6821f;
  --accent-soft: #fff3e6;
  --code-bg: #12151c;
  --code-text: #d7dce6;
  --radius: 12px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(900px 420px at 12% -8%, #ffe9d2 0%, transparent 60%),
    radial-gradient(700px 380px at 92% 4%, #e6f0ff 0%, transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.hero {
  max-width: 960px;
  margin: 0 auto;
  padding: 72px 24px 40px;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: var(--accent-soft);
  color: #b45a00;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 18px 0 12px;
  font-size: clamp(28px, 4.4vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.hero .sub {
  margin: 0;
  max-width: 620px;
  color: var(--muted);
  font-size: 15px;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.card {
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
}

.card h2 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 650;
}

.card p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 13.5px;
}

.tag {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 6px;
  background: #f1f3f7;
  color: #414a5c;
  font-family: var(--mono);
  font-size: 11.5px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
}

.panel-head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

.panel-head h3 { margin: 0; font-size: 14px; font-weight: 650; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; }

button {
  padding: 7px 13px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
}

button:hover { border-color: var(--accent); background: var(--accent-soft); }
button:active { transform: translateY(1px); }

pre {
  margin: 0;
  padding: 18px;
  min-height: 220px;
  overflow: auto;
  background: var(--code-bg);
  color: var(--code-text);
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
}

footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px 56px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12.5px;
}

code:not(pre code) {
  padding: 1px 5px;
  border-radius: 4px;
  background: #eef1f6;
  font-family: var(--mono);
  font-size: 0.92em;
}