/* 品牌主色 */
:root {
  --bs-primary: #2563eb;
  --bs-primary-rgb: 37,99,235;
}

/* Logo字体 */
.navbar-brand {
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* 卡片效果 */
.card {
  border-radius: 12px;
  border: 1px solid #e5e7eb;
  transition: all .2s ease;
}

.card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,.08);
}

/* 问题标题 */
.question-title,
a.text-wrap {
  font-weight: 600;
}

/* Tag */
.badge {
  border-radius: 6px;
}

/* 首页欢迎横幅 */
.hero-box {
  background: linear-gradient(
    135deg,
    #1e293b,
    #0f172a
  );
  color: #fff;
  padding: 24px;
  border-radius: 12px;
  margin-bottom: 20px;
}