/* 基础样式 */
:root {
  --primary-color: #87CEEB; /* 浅蓝色 */
  --secondary-color: #F5F5F5; /* 浅灰色 */
  --accent-color: #FFA500; /* 橙色 */
  --text-color: #333333;
  --white: #FFFFFF;
}

/* 暗黑模式 */
.dark-mode {
  --primary-color: #64B5F6;
  --secondary-color: #121212;
  --accent-color: #FFB74D;
  --text-color: #E0E0E0;
  --white: #1E1E1E;
}

.dark-mode body {
  background-color: #121212;
  color: #E0E0E0;
}

.dark-mode #navbar {
  background-color: #1E1E1E;
}

.dark-mode .nav-links a {
  color: #E0E0E0;
}

.dark-mode .home-section {
  background-color: #1E1E1E;
}

.theme-toggle {
  margin-left: 1rem;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-color);
  transition: color 0.3s ease;
}

.theme-toggle:hover {
  color: var(--accent-color);
}

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

body {
  font-family: 'Roboto', sans-serif;
  color: var(--text-color);
  line-height: 1.6;
}

h1, h2, h3 {
  font-family: 'Poppins', sans-serif;
}

/* 导航栏样式 */
#navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: var(--white);
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  z-index: 1000;
  transition: all 0.3s ease;
}

/* 移动端样式 */
@media (max-width: 768px) {
  .hamburger {
    display: block;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--white);
    flex-direction: column;
    align-items: center;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav-links.active {
    max-height: 300px;
    padding: 1rem 0;
  }

  .nav-links li {
    margin: 1rem 0;
  }

  .contact-btn {
    display: none;
  }
}

#navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 15px rgba(0,0,0,0.1);
}

.nav-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
  text-decoration: none;
}

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

.nav-links li {
  margin-left: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  transition: color 0.3s ease;
}

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

.contact-btn {
  background-color: var(--accent-color);
  color: var(--white);
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.contact-btn:hover {
  background-color: #e69500;
}

/* 首页样式 */
.home-section {
  height: 100vh;
  background-color: var(--secondary-color);
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.home-content {
  max-width: 800px;
  padding: 0 2rem;
}

.profile-img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1.5rem;
  border: 5px solid var(--white);
  box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

.home-content h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.home-content h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.home-content p {
  font-size: 1.2rem;
  color: var(--text-color);
}