/* 高级感国际广告代理主题配色 */
:root {
  --primary-color: #1B263B;
  --accent-green: #27AE60;
  --accent-gold: #FFD700;
  --background-light: #F7F8FA;
  --text-main: #232323;
  --text-secondary: #7B7B7B;
}

body {
  margin: 0;
  font-family: 'Helvetica Neue', sans-serif;
  background: var(--background-light);
  color: var(--text-main);
  line-height: 1.6;
}

.container {
  width: 90%;
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 0;
}

/* 顶部横幅样式 */
.hero {
  background: linear-gradient(to right, var(--primary-color), var(--accent-green));
  color: #fff;
  text-align: center;
  padding: 80px 20px;
}

.hero h1 {
  font-size: 3em;
  margin: 0.3em 0;
}

.hero h2 {
  font-size: 1.5em;
  font-weight: 400;
  color: var(--accent-gold);
}

/* 服务列表样式 */
.services {
  background: #fff;
  text-align: left;
  padding: 60px 20px;
}

.services h2 {
  text-align: center;
  font-size: 2em;
  margin-bottom: 1em;
  color: var(--primary-color);
}

.services ul {
  list-style: none;
  padding: 0;
}

.services li {
  font-size: 1.2em;
  margin: 1em 0;
  border-left: 4px solid var(--accent-green);
  padding-left: 10px;
  color: var(--text-secondary);
}

/* 联系我们样式 */
.contact {
  background: #F2F5F7;
  text-align: center;
  padding: 60px 20px;
}

.contact h2 {
  font-size: 2em;
  margin-bottom: 0.5em;
  color: var(--primary-color);
}

/* 页脚样式 */
.footer {
  background: var(--primary-color);
  color: #e3e3e3;
  text-align: center;
  padding: 20px 0;
  font-size: 0.9em;
}

.lang-switcher {
  position: absolute;
  top: 10px;
  right: 20px;
}

.lang-switcher button {
  margin-left: 5px;
  padding: 6px 12px;
  border: none;
  background: var(--accent-green);
  color: #fff;
  cursor: pointer;
  border-radius: 4px;
  font-size: 0.9em;
  transition: background 0.3s;
}

.lang-switcher button:hover {
  background: var(--accent-gold);
  color: var(--primary-color);
}

/* 顶部导航栏 */
.navbar {
  background-color: var(--background-light);
  border-bottom: 1px solid #e0e0e0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
}

.logo {
  font-size: 1.5em;
  font-weight: bold;
  color: var(--primary-color);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
}

.nav-links li a {
  text-decoration: none;
  color: var(--primary-color);
  font-weight: 500;
  transition: color 0.3s;
}

.nav-links li a:hover {
  color: var(--accent-green);
}

/* 通用按钮和高亮 */
.button, button {
  background: var(--primary-color);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 12px 28px;
  font-weight: bold;
  transition: background 0.3s, color 0.3s;
}
.button:hover, button:hover {
  background: linear-gradient(90deg, var(--accent-green), var(--accent-gold));
  color: var(--primary-color);
}

.badge, .highlight {
  background: var(--accent-gold);
  color: var(--primary-color);
  border-radius: 4px;
  padding: 2px 8px;
}

<style>
button {
  padding: 8px 16px;
  font-size: 16px;
  margin: 16px 0;
  cursor: pointer;
}
</style>

#back-home {
  position: fixed;
  top: 20px;
  left: 20px;
  background: #ff5722;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 10px 20px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  z-index: 9999;
  transition: background 0.2s;
}
#back-home:hover {
  background: #d84315;
}