/* 全局重置 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0a0a0a;
  color: #e5e5e5;
  line-height: 1.6;
}
a { color: #f6821f; text-decoration: none; }
a:hover { text-decoration: underline; }
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #2a2a2a;
  z-index: 100;
  padding: 1rem 0;
}
.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-links a {
  color: #ccc;
  margin-left: 2rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active {
  color: #f6821f;
  text-decoration: none;
}
.nav-brand {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #f6821f, #faab41);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 通用按钮 */
.btn-primary {
  display: inline-block;
  background: #f6821f;
  color: #fff;
  padding: 0.75rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  transition: background 0.2s, transform 0.1s;
}
.btn-primary:hover {
  background: #d96d15;
  text-decoration: none;
  transform: translateY(-2px);
}

/* 页面头部 */
.page-header {
  padding: 8rem 0 3rem;
  text-align: center;
  border-bottom: 1px solid #2a2a2a;
}
.page-header h1 {
  font-size: 3rem;
  font-weight: 800;
}
.page-header p {
  color: #aaa;
  font-size: 1.2rem;
  margin-top: 0.5rem;
}

/* 内容区域 */
.section {
  padding: 4rem 0;
  border-bottom: 1px solid #1a1a1a;
}
.section:last-child { border-bottom: none; }