/* ===== 主题变量 ===== */
:root {
  --color-primary: #007bff;
  --color-primary-hover: #0056b3;
  --color-secondary: #6c757d;
  --color-light: #ffffff;
  --color-dark: #212529;
  --color-bg: #f8f9fa;
  --color-border: #dee2e6;
  --color-text: #333333;
  --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
  --color-light: #1a1a1a;
  --color-dark: #ffffff;
  --color-bg: #121212;
  --color-border: #333333;
  --color-text: #ffffff;
  --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

/* ===== 全局重置 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  transition: background-color 0.3s, color 0.3s;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 导航栏（带主题/语言按钮） ===== */
.navbar {
  background: var(--color-light);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: background-color 0.3s;
}

[data-theme="dark"] .navbar {
  background: var(--color-dark);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
}

.nav-brand a {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-primary);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-menu a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
}

.nav-menu a:hover {
  color: var(--color-primary);
}

.nav-controls {
  display: flex;
  gap: 0.5rem;
}

.nav-btn {
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--color-border);
  background: var(--color-light);
  color: var(--color-text);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.3s;
}

[data-theme="dark"] .nav-btn {
  background: var(--color-dark);
  border-color: var(--color-border);
  color: var(--color-text);
}

.nav-btn:hover {
  opacity: 0.8;
}

/* ===== 页面标题区 ===== */
.page-header {
  background: var(--color-bg);
  padding: 80px 20px;
  text-align: center;
  transition: background-color 0.3s;
}

.page-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.page-subtitle {
  font-size: 1.1rem;
  color: var(--color-secondary);
}

/* ===== 内容区通用样式 ===== */
section {
  padding: 60px 20px;
}

.section-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 3rem;
  color: var(--color-text);
}

/* ===== 公司简介 / 团队 / 文化通用容器 ===== */
.intro-content,
.team-grid,
.culture-values {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.intro-content p {
  font-size: 1.1rem;
  color: var(--color-secondary);
  line-height: 1.8;
}

/* ===== 团队成员卡片 ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.team-member {
  background: var(--color-light);
  padding: 2rem;
  border-radius: 8px;
  box-shadow: var(--card-shadow);
  text-align: center;
  transition: box-shadow 0.3s;
}

[data-theme="dark"] .team-member {
  background: var(--color-dark);
  color: var(--color-text);
}

.member-avatar {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.team-member h3 {
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

.team-member p {
  color: var(--color-secondary);
  font-size: 0.95rem;
}

/* ===== 企业文化卡片 ===== */
.culture-values {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.value-item {
  background: var(--color-light);
  padding: 2rem;
  border-radius: 8px;
  box-shadow: var(--card-shadow);
  text-align: center;
}

[data-theme="dark"] .value-item {
  background: var(--color-dark);
  color: var(--color-text);
}

.value-item h3 {
  margin-bottom: 1rem;
  color: var(--color-primary);
}

.value-item p {
  color: var(--color-secondary);
  line-height: 1.6;
}

/* ===== 按钮 & CTA ===== */
.btn {
  padding: 0.8rem 1.5rem;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-light);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-light);
}

.cta-section {
  background: var(--color-bg);
  text-align: center;
  transition: background-color 0.3s;
}

.cta-text {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

/* ===== 动画类（假设你已有） ===== */
.fade-in-up {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}