/* 全局样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 字体引入 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;600;700&display=swap');

:root {
  /* 莫兰迪色系 */
  --primary-color: #8a817c;
  --secondary-color: #bcb8b1;
  --background-color: #f8f7f2;
  --text-color: #333333;
  --accent-color: #4a4a4a;
  --light-gray: #e8e6e0;
  --white: #ffffff;
  
  /* 间距 */
  --desktop-padding: 40px;
  --mobile-padding: 20px;
  --module-spacing: 30px;
  --card-spacing: 20px;
  
  /* 过渡动画 */
  --transition: all 0.3s ease;
}

body {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
  font-size: 16px;
}

/* 导航栏样式 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(248, 247, 242, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: var(--transition);
  padding: 1rem var(--desktop-padding);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.navbar.scrolled {
  background-color: rgba(248, 247, 242, 0.98);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

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

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

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

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

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 400;
  transition: var(--transition);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--text-color);
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 主内容区域 */
main {
  margin-top: 80px;
  min-height: calc(100vh - 80px - 120px);
}

/* 首页样式 */
.hero {
  padding: 6rem var(--desktop-padding);
  text-align: center;
  background-color: var(--light-gray);
  margin-bottom: var(--module-spacing);
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--accent-color);
}

.hero p {
  font-size: 1.25rem;
  color: var(--primary-color);
  margin-bottom: 2rem;
}

.quick-nav {
  padding: 0 var(--desktop-padding) 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

.quick-nav h2 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--accent-color);
}

.nav-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--card-spacing);
}

.nav-card {
  background-color: var(--white);
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
  text-align: center;
  text-decoration: none;
  color: var(--text-color);
}

.nav-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.nav-card i {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.nav-card h3 {
  margin-bottom: 0.5rem;
  font-weight: 600;
}

/* 关于页面样式 */
.about {
  padding: 4rem var(--desktop-padding);
  max-width: 1000px;
  margin: 0 auto;
}

.about h1 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--accent-color);
}

.about-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.avatar {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--light-gray);
}

.bio {
  text-align: center;
  max-width: 800px;
}

.bio h2 {
  margin-bottom: 1rem;
  color: var(--accent-color);
  font-size: 1.5rem;
}

.skills {
  width: 100%;
  max-width: 600px;
}

.skills h2 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--accent-color);
  font-size: 1.5rem;
}

.skill-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background-color: var(--white);
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.skill-item i {
  color: var(--primary-color);
  font-size: 1.25rem;
}

.contact {
  text-align: center;
  margin-top: 2rem;
  padding: 2rem;
  background-color: var(--light-gray);
  border-radius: 8px;
  width: 100%;
  max-width: 600px;
}

.contact h2 {
  margin-bottom: 1rem;
  color: var(--accent-color);
  font-size: 1.5rem;
}

.contact-info {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.contact-item i {
  color: var(--primary-color);
}

/* PDF页面样式 */
.pdf-page {
  padding: 4rem var(--desktop-padding);
  max-width: 1200px;
  margin: 0 auto;
}

.pdf-page h1 {
  text-align: center;
  margin-bottom: 1rem;
  color: var(--accent-color);
}

.pdf-page p {
  text-align: center;
  margin-bottom: 3rem;
  color: var(--primary-color);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.pdf-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--card-spacing);
}

.pdf-card {
  background-color: var(--white);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  padding: 1.5rem;
  transition: var(--transition);
}

.pdf-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.pdf-card h3 {
  margin-bottom: 0.5rem;
  color: var(--accent-color);
}

.pdf-meta {
  font-size: 0.875rem;
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

.pdf-description {
  margin-bottom: 1.5rem;
  color: var(--text-color);
}

.pdf-actions {
  display: flex;
  gap: 1rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
}

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

.btn-primary:hover {
  background-color: var(--accent-color);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--light-gray);
  color: var(--text-color);
  border: 1px solid var(--secondary-color);
}

.btn-secondary:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
}

/* PDF预览模态框 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: 2000;
  justify-content: center;
  align-items: center;
  padding: var(--mobile-padding);
}

.modal.active {
  display: flex;
  animation: fadeIn 0.3s ease;
}

.modal-content {
  background-color: var(--white);
  border-radius: 8px;
  width: 100%;
  max-width: 900px;
  max-height: 90vh;
  overflow: hidden;
  position: relative;
  animation: slideIn 0.3s ease;
}

.modal-header {
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--light-gray);
}

.modal-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--accent-color);
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-color);
  transition: var(--transition);
}

.close-btn:hover {
  color: var(--primary-color);
  transform: rotate(90deg);
}

.modal-body {
  padding: 1rem;
  height: calc(90vh - 80px);
}

#pdf-viewer {
  width: 100%;
  height: 100%;
  border: none;
}

/* 页脚样式 */
.footer {
  background-color: var(--accent-color);
  color: var(--white);
  padding: 3rem var(--desktop-padding);
  margin-top: 4rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.footer-links a {
  color: var(--white);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--secondary-color);
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  color: var(--white);
  font-size: 1.25rem;
  transition: var(--transition);
}

.footer-social a:hover {
  color: var(--secondary-color);
  transform: translateY(-3px);
}

.copyright {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--secondary-color);
  text-align: center;
}

/* 动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideIn {
  from {
    transform: translateY(-20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* 响应式设计 */
@media (max-width: 768px) {
  :root {
    --desktop-padding: var(--mobile-padding);
  }
  
  .navbar {
    padding: 1rem var(--mobile-padding);
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background-color: var(--white);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transition: var(--transition);
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hero {
    padding: 4rem var(--mobile-padding);
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .quick-nav {
    padding: 0 var(--mobile-padding) 3rem;
  }
  
  .about {
    padding: 3rem var(--mobile-padding);
  }
  
  .pdf-page {
    padding: 3rem var(--mobile-padding);
  }
  
  .footer {
    padding: 2rem var(--mobile-padding);
  }
  
  .footer-links {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  
  .contact-info {
    flex-direction: column;
    gap: 1rem;
  }
  
  .pdf-actions {
    flex-direction: column;
  }
  
  .modal-content {
    max-width: 100%;
  }
  
  .modal-body {
    height: calc(80vh - 80px);
  }
}