:root {
  --bg: #ffffff;
  --text: #1f2937;
  --text-muted: #6b7280;
  --primary: #16a34a;
  --primary-dark: #15803d;
  --border: #e5e7eb;
  --radius: 12px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 20px;
}

.page-header {
  text-align: center;
  margin-bottom: 40px;
}

.buy-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  border-radius: var(--radius);
  padding: 22px 28px;
  text-decoration: none;
  margin-bottom: 32px;
}

.buy-banner h2 {
  font-size: 1.3rem;
  margin-bottom: 4px;
}

.buy-banner p {
  opacity: 0.9;
  font-size: 0.95rem;
}

.buy-btn {
  flex-shrink: 0;
  background: #fff;
  color: var(--primary);
  padding: 10px 20px;
  border-radius: 999px;
  font-weight: 700;
  white-space: nowrap;
}

.page-header h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.page-header p {
  color: var(--text-muted);
}

.link-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.link-card {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.link-card:hover {
  border-color: var(--primary);
  box-shadow: 0 6px 20px rgba(22, 163, 74, 0.12);
}

.link-card h3 {
  color: var(--primary);
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.link-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  flex: 1;
  margin-bottom: 16px;
}

.link-card a {
  align-self: flex-start;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.link-card a:hover {
  text-decoration: underline;
}