/* ==========================================================================
   基础样式重置和全局设置
   ========================================================================== */

body {
  line-height: 1.6;
  color: #333;
  background-color: #fff;
}

a {
  color: #007bff;
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #0056b3;
}

p {
  text-indent: 2em;
  margin-top: 0;
  margin-bottom: 10px;
}

p:last-of-type {
  margin-bottom: 0;
}

/* ==========================================================================
   页面头部样式
   ========================================================================== */

body > header {
  min-height: 5vh;
  background-color: #f6f6f6;
  display: flex;
  align-items: center;
  justify-content: center;
}

body > header h1 {
  font-size: 2em;
  margin: 0;
  font-weight: bold;
  text-align: center;
  color: black;
}

body > header nav {
  position: absolute;
  right: 0;
}

nav a {
  color: #04669e;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  margin: 0.5rem;
  border-radius: 4px;
}

nav a:hover {
  color: #0056b3;
  text-decoration: underline;
}

/* ==========================================================================
   主布局容器
   ========================================================================== */

#container {
  display: grid;
  grid-template-columns: minmax(10em, 10vw) 1fr;
  grid-template-areas: "menu content";
  gap: 1rem;
  background: white;
  min-height: 100vh;
}

/* ==========================================================================
   侧边栏导航菜单
   ========================================================================== */

#layout-menu {
  grid-area: menu;
  position: sticky;
  top: 0;
  background: #f6f6f6;
  border: 1px solid #ddd;
  padding: 0.5em 0.5em;
  height: 100vh;
  /* min-width: 10em; */
  box-shadow: 2px 0 4px rgba(0, 0, 0, 0.1);
}

.menu-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.menu-item {
  margin-bottom: 0.3rem;
}

.menu-item a {
  display: block;
  padding: 0.5rem 0.8rem;
  border-radius: 4px;
  transition: all 0.3s ease;
  color: #333;
  font-weight: 500;
}

.menu-item a:hover {
  background-color: #e9ecef;
  color: #007bff;
  transform: translateX(2px);
}

/* ==========================================================================
   主内容区域
   ========================================================================== */

#layout-content {
  grid-area: content;
  background: white;
  text-align: left;
  padding: 1rem;
  font-size: 1.25rem;
  max-width: 1500px;
  justify-self: center;
}

section {
  margin: 2rem 0;
}

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

section h2 {
  color: #2c3e50;
  border-bottom: 2px solid #007bff;
  padding-bottom: 0.5rem;
  /* margin-bottom: 1rem; */
  font-weight: 600;
  font-size: 2rem;
}

.sticky-heading {
  position: sticky;
  top: 0;
  background: white;
  z-index: 10;
}

/* 列表样式 */
.list-section ol {
  list-style: none;
  counter-reset: paper-counter;
  padding-left: 0;
  margin-left: 0;
}

.list-section ol li {
  counter-increment: paper-counter;
  position: relative;
  padding-left: 3rem;
  margin-bottom: 1rem;
}

.list-section ol li::before {
  content: "[" counter(paper-counter) "]";
  position: absolute;
  left: 0;
  top: 0;
  font-weight: bold;
}

/* ==========================================================================
   个人信息区域样式
   ========================================================================== */

#profile {
  display: flex;
  justify-content: space-around;
  gap: 1em;
  /* flex-wrap: wrap; */
}

#profile h2 {
  height: 80px;
  border: 0;
  margin: 0;
  margin-top: 0.5rem;
  font-size: 1.75em;
  font-weight: 700;
  color: #2c3e50;
}

#profile-info h2 span {
  font-size: 1.5rem;
  color: #007bff;
  margin-left: 1rem;
  font-weight: 600;
}

#profile ul {
  padding-left: 0.5em;
  margin: 0;
}

#profile li::marker {
  content: "";
}

#profile img {
  max-width: 240px;
  min-width: 200px;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

#profile img:hover {
  transform: scale(1.02);
}

#profile-info {
  flex-shrink: 0;
  text-align: left;
  max-width: 480px;
}

#researchArea {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  max-width: 450px;
}

/* ==========================================================================
   内容区域样式
   ========================================================================== */

.section-content {
  line-height: 1.8;
  text-align: justify;
}

.project-section li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.project-section li span {
  flex-grow: 0;
}

.project-section li span:last-child {
  margin-left: 1rem;
}

/* ==========================================================================
   招生通知样式
   ========================================================================== */

.recruitment-notice {
  /* margin: 2rem 0; */
  padding: 1.5rem;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  border-radius: 12px;
  border-left: 4px solid #007bff;
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.1);
}

.recruitment-text {
  text-indent: 0;
  text-align: center;
  margin-bottom: 0;
  font-size: 1.8rem;
  line-height: 1.4;
  color: #2c3e50;
  font-weight: 600;
}

.recruitment-text a {
  color: #007bff;
  text-decoration: none;
  transition: all 0.3s ease;
}

.recruitment-text a:hover {
  color: #0056b3;
  text-decoration: underline;
}

/* ==========================================================================
   多列布局样式
   ========================================================================== */
.graduates-employment {
  column-count: 2;
  column-gap: 2rem;
  column-fill: balance;
}

.graduates-employment ul {
  margin: 0;
  padding-left: 1.5rem;
}

.graduates-employment li {
  break-inside: avoid;
  margin-bottom: 0.5rem;
  page-break-inside: avoid;
}

.graduates-employment li {
  margin-bottom: 0.3rem;
}

/* ==========================================================================
   响应式设计 - 媒体查询
   ========================================================================== */

/* 中小屏幕设备 (平板和手机) - 1280px以下 */
@media screen and (max-width: 1280px) {
  /* 隐藏侧边栏 */
  #layout-menu {
    display: none;
  }

  /* 主内容区占满全宽 */
  #container {
    grid-template-columns: 1fr;
    grid-template-areas: "content";
  }

  #layout-content {
    width: 100%;
    padding: 0.5rem;
  }

  body > header nav {
    position: static;
    margin-left: auto;
  }

  body > header {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
}