/* 颜色取自品牌标志 design/brand/ultrapads-mark.svg：底色 #0e0f11 → #1d1e23、U 的粉紫渐变、pad 竖笔青色、琥珀 orb */
:root {
  --bg: #0e0f11;
  --card: #1d1e23;
  --line: #2e3038;
  --text: #ffffff;
  --muted: #9a9ca8;
  --accent: #f23cf0;
  --accent-grad: linear-gradient(135deg, #ff8ab3, #f23cf0 55%, #7e4398);
  --accent-2: #3fddfe;
  --orb: #ffb26e;
  --radius: 14px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background:
    radial-gradient(900px 500px at 30% -200px, rgba(242, 60, 240, .16), transparent 70%),
    radial-gradient(700px 400px at 80% -150px, rgba(63, 221, 254, .10), transparent 70%),
    var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", "Noto Sans SC", "PingFang SC", sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 48px 16px 32px; }
a { color: var(--accent-2); }
.hero { text-align: center; margin-bottom: 32px; }
.logo { filter: drop-shadow(0 8px 32px rgba(242, 60, 240, .35)); }
h1 { font-size: 40px; margin: 12px 0 4px; letter-spacing: .02em; }
.tagline { color: var(--muted); margin: 0 0 8px; }
.version { margin: 0; color: var(--muted); }
.version strong { color: var(--orb); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin: 16px 0; }
h2 { margin: 0 0 8px; font-size: 22px; }
h2 small { color: var(--muted); font-size: 14px; font-weight: 400; margin-left: 6px; }
.cmd { display: flex; gap: 8px; align-items: stretch; margin: 12px 0; }
.cmd code { flex: 1; min-width: 0; overflow-x: auto; white-space: nowrap; background: #08090a; border: 1px solid var(--line); border-radius: 10px; padding: 12px; font: 14px/1.4 ui-monospace, "JetBrains Mono", monospace; }
button, .btn { font: inherit; border-radius: 10px; border: 1px solid var(--line); background: #2a2c33; color: var(--text); padding: 10px 16px; cursor: pointer; text-decoration: none; display: inline-block; }
button:hover, .btn:hover { border-color: var(--accent); }
.btn.primary, #copy { background: var(--accent-grad); border-color: transparent; }
.buttons { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
details { margin-top: 8px; }
summary { cursor: pointer; color: var(--muted); }
pre { background: #08090a; border: 1px solid var(--line); border-radius: 10px; padding: 12px; overflow-x: auto; font: 13px/1.6 ui-monospace, monospace; }
.muted { color: var(--muted); font-size: 14px; }
footer { text-align: center; margin-top: 32px; color: var(--muted); }
footer span { margin: 0 6px; }
.link { background: none; border: none; padding: 0; color: var(--accent-2); text-decoration: underline; }
@media (max-width: 480px) { .cmd { flex-direction: column; } h1 { font-size: 32px; } }