:root {
  color-scheme: dark;
  --bg: #0d0d0d;
  --panel: #171717;
  --panel-soft: #202020;
  --line: #343434;
  --text: #f5f5f5;
  --muted: #a4a4a4;
  --accent: #ff7a1a;
  --accent-soft: rgba(255, 122, 26, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  background:
    radial-gradient(circle at 18% 0, rgba(255, 122, 26, 0.18), transparent 28rem),
    linear-gradient(180deg, #161616 0%, var(--bg) 22rem);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

.page {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0 56px;
}

.top-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

.hero {
  padding: 36px 0 30px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
}

h1 {
  margin: 0;
  font-size: clamp(34px, 8vw, 64px);
  line-height: 1.05;
  letter-spacing: 0;
}

.lead {
  max-width: 760px;
  margin: 22px 0 0;
  color: #d6d6d6;
  font-size: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  font-weight: 600;
}

.button-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #141414;
}

.section {
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.section h2 {
  margin: 0 0 14px;
  font-size: 24px;
  line-height: 1.25;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.tile,
.content-block {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(23, 23, 23, 0.84);
  padding: 18px;
}

.tile:hover {
  border-color: rgba(255, 122, 26, 0.72);
  background: var(--panel-soft);
}

.tile strong {
  display: block;
  margin-bottom: 6px;
  color: var(--text);
  font-size: 17px;
}

.tile span,
.content-block p,
.content-block li {
  color: var(--muted);
}

.content-block p {
  margin: 0;
}

.content-block ul {
  margin: 0;
  padding-left: 20px;
}

.footer {
  margin-top: 42px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 640px) {
  .page {
    width: min(100% - 24px, 960px);
    padding-top: 28px;
  }

  .hero {
    padding-top: 28px;
  }

  .lead {
    font-size: 16px;
  }
}