/* 
 * 学术主页样式表
 * 简洁、专业的设计风格，适合学术个人主页
 */

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

/* 变量定义 */
:root {
  --primary-color: #2c3e50; /* 主要文字颜色 */
  --secondary-color: #3498db; /* 强调颜色 */
  --bg-color: #f9f9f9; /* 背景色 */
  --light-bg: #ffffff; /* 浅色背景 */
  --border-color: #e0e0e0; /* 边框颜色 */
  --font-serif: "Noto Serif SC", Georgia, "Times New Roman", serif; /* 衬线字体 */
  --font-sans: "Noto Sans SC", "Helvetica Neue", Arial, sans-serif; /* 无衬线字体 */
}

/* 全局样式 */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.8;
  color: var(--primary-color);
  background-color: var(--bg-color);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-sans);
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--primary-color);
  line-height: 1.4;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 1.8rem;
  margin-top: 2rem;
}

h3 {
  font-size: 1.4rem;
  margin-top: 1.5rem;
}

p {
  margin-bottom: 1.2rem;
}

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

a:hover {
  color: #2980b9;
  text-decoration: underline;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* 导航栏 */
.navigation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--light-bg);
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  padding: 1rem 0;
}

.navigation .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

nav ul {
  display: flex;
  list-style: none;
}

nav ul li {
  margin-left: 2rem;
}

nav ul li a {
  color: var(--primary-color);
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 1rem;
  padding: 0.5rem 0;
  text-decoration: none;
  position: relative;
}

nav ul li a::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: var(--secondary-color);
  transition: width 0.3s;
}

nav ul li a:hover::after {
  width: 100%;
}

/* 个人简介部分 */
.profile-section {
  padding-top: 6rem;
  padding-bottom: 3rem;
  background-color: var(--light-bg);
}

.profile-content {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.profile-image {
  flex: 0 0 200px;
  margin-right: 3rem;
}

.profile-image img {
  width: 100%;
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.profile-details {
  flex: 1;
  min-width: 300px;
}

.profile-details h1 {
  margin-bottom: 0.5rem;
}

.english-name {
  font-size: 0.8em;
  color: #666;
  font-weight: normal;
}

.profile-details h2 {
  font-size: 1.2rem;
  color: #555;
  font-weight: 400;
  margin-top: 0;
  margin-bottom: 1rem;
}

.bio {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.profile-links {
  margin-top: 1.5rem;
}

.profile-links .link {
  margin-right: 1.5rem;
  color: var(--primary-color);
  font-family: var(--font-sans);
  display: inline-flex;
  align-items: center;
}

.profile-links .link i {
  margin-right: 0.5rem;
  color: var(--secondary-color);
}

/* 内容部分 */
main {
  padding: 2rem 0 4rem 0;
}

.content-section {
  padding: 3rem 0;
  border-bottom: 1px solid var(--border-color);
}

.content-section:last-child {
  border-bottom: none;
}

.section-title {
  margin-bottom: 2rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--secondary-color);
  display: inline-block;
}

.section-content {
  margin-top: 1.5rem;
}

/* 教育背景 */
.education-list {
  list-style: none;
  margin-top: 1.5rem;
}

.education-list li {
  display: flex;
  margin-bottom: 1.5rem;
}

.year {
  flex: 0 0 150px;
  font-family: var(--font-sans);
  font-weight: 500;
  color: var(--secondary-color);
}

.education-item {
  flex: 1;
}

.education-item h4 {
  margin-bottom: 0.3rem;
}

.education-item p {
  color: #666;
  font-size: 0.95rem;
}

/* 技能列表 */
.skills-list {
  list-style: none;
  margin-top: 1rem;
}

.skills-list li {
  margin-bottom: 0.8rem;
  line-height: 1.6;
}

.skill-category {
  font-family: var(--font-sans);
  font-weight: 500;
  color: var(--primary-color);
  margin-right: 0.5rem;
}

/* 项目网格 */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.project-card {
  background-color: var(--light-bg);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.project-card h3 {
  margin-top: 0;
}

.project-links {
  margin-top: 1.5rem;
}

/* 论文列表 */
.publications-list {
  list-style: none;
  margin-top: 2rem;
}

.publication-item {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.publication-item:last-child {
  border-bottom: none;
}

.publication-item h3 {
  margin-bottom: 0.5rem;
}

.authors {
  color: #555;
  margin-bottom: 0.3rem;
}

.journal {
  color: #666;
  margin-bottom: 1rem;
}

.publication-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.button {
  display: inline-block;
  background-color: var(--secondary-color);
  color: white !important;
  padding: 0.6rem 1.2rem;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  margin-right: 0.8rem;
  margin-bottom: 0.5rem;
  transition: background-color 0.3s ease;
  text-decoration: none !important;
}

.button:hover {
  background-color: #2980b9;
}

.button.small {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
}

.citation-count {
  color: #666;
  font-size: 0.9rem;
  margin-left: auto;
  display: flex;
  align-items: center;
}

.citation-count i {
  margin-right: 0.5rem;
  color: var(--secondary-color);
}

/* 联系方式 */
.contact-content {
  max-width: 600px;
  margin: 0 auto;
}

.contact-info p {
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
}

.contact-info i {
  color: var(--secondary-color);
  margin-right: 1rem;
  width: 20px;
  text-align: center;
}

/* 页脚 */
footer {
  background-color: #f2f2f2;
  padding: 2rem 0;
  text-align: center;
  color: #666;
  border-top: 1px solid var(--border-color);
}

footer p {
  font-size: 0.9rem;
}

footer a {
  color: #555;
}

/* 响应式设计 */
@media (max-width: 992px) {
  .profile-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .profile-image {
    margin-right: 0;
    margin-bottom: 2rem;
  }

  .profile-links {
    justify-content: center;
  }

  .year {
    flex: 0 0 100px;
  }
}

@media (max-width: 768px) {
  .navigation {
    padding: 0.8rem 0;
  }

  .logo a {
    font-size: 1.3rem;
  }

  nav ul li {
    margin-left: 1.2rem;
  }

  nav ul li a {
    font-size: 0.9rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .profile-section {
    padding-top: 5rem;
  }

  .education-list li {
    flex-direction: column;
  }

  .year {
    margin-bottom: 0.5rem;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  body {
    font-size: 15px;
  }

  h1 {
    font-size: 1.8rem;
  }

  .container {
    width: 95%;
  }

  .navigation .container {
    flex-direction: column;
  }

  .logo {
    margin-bottom: 1rem;
  }

  nav ul {
    justify-content: center;
  }

  nav ul li {
    margin: 0 0.8rem;
  }

  .profile-image {
    flex: 0 0 150px;
  }
}