/* =============================================
   Responsive Styles — School of Medicine
   Breakpoints:
     ≤1200px  large desktop / small desktop
     ≤992px   tablet landscape
     ≤768px   tablet portrait
     ≤576px   mobile landscape
     ≤480px   mobile portrait
   ============================================= */

/* 桌面端隐藏 hamburger 按钮 */
.nav-toggle {
  display: none;
}

/* 桌面端 collapse 始终可见（即使没有 Bootstrap JS 也不折叠） */
#mainNav {
  display: block !important;
}

/* -----------------------------------------------
   ≤1200px — 大屏收窄，限制固定宽度元素
----------------------------------------------- */
@media (max-width: 1200px) {
  /* Logo name 图片缩短 */
  .logo_name {
    display: none;
  }

  /* 导航栏宽度收窄 */
  .main_nav {
    width: 900px;
    padding: 20px 20px 20px 120px;
  }

  /* Banner 高度适当降低 */
  .banner-swiper {
    height: 560px;
  }

  /* Publications showcase 右偏移收回 */
  .publications-showcase {
    right: 0;
    width: 340px;
  }
  .quick-links-list{
    margin-top: 25px;
  }
  /* quick-links-list 宽度收窄 */
  .quick-links-list {
    position: static;
    width: 100%;
  }
}

/* -----------------------------------------------
   ≤992px — 平板横屏：部分水平布局开始折叠
----------------------------------------------- */
@media (max-width: 992px) {
  /* Header 高度自适应，作为菜单定位参考 */
  .logo::after{
    display: none;
  }
  .header {
    height: auto;
    position: relative;
    z-index: 100;
  }
  .top_bar {
    height: auto;
  }

  /* Logo name 进一步缩小 */
  .logo_name {
    display: none;
  }

  .logo_img {
    width: 60px;
    height: auto;
    margin: 10px 0;
  }

  .logo {
    gap: 16px;
    padding-top: 0;
  }

  /* header_right 字体缩小 */
  .header_right {
    padding-top: 20px;
    gap: 16px;
  }

  .lang-switch a,
  .lang-switch span {
    font-size: 14px;
  }

  .search_box {
    width: 170px;
    height: 36px;
    padding: 3px 4px 3px 14px;
  }

  .search_box input,
  .search_box input::placeholder {
    font-size: 14px;
  }

  /* ===== 导航 hamburger + collapse ===== */

  /* top_content 中显示 hamburger */
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    position: relative;
    z-index: 11;
    flex-shrink: 0;
    margin-right: 0;
    align-self: center;
  }

  .nav-toggle-icon,
  .nav-toggle-icon::before,
  .nav-toggle-icon::after {
    display: block;
    width: 24px;
    height: 2px;
    background: #D6F5FF;
    border-radius: 2px;
    transition: all 0.3s ease;
    position: absolute;
  }

  .nav-toggle-icon {
    position: relative;
  }

  .nav-toggle-icon::before {
    content: "";
    top: -7px;
    left: 0;
  }

  .nav-toggle-icon::after {
    content: "";
    top: 7px;
    left: 0;
  }

  /* toggle 展开态 → X */
  .nav-toggle[aria-expanded="true"] .nav-toggle-icon {
    background: transparent;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
    top: 0;
    transform: rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
    top: 0;
    transform: rotate(-45deg);
  }

  /* main_nav 作为绝对定位浮层，不占文档流 */
  .main_nav {
    position: static;
    padding: 0;
    height: auto;
  }

  /* Bootstrap collapse 默认隐藏；展开时绝对定位浮于 header 下方 */
  #mainNav {
    display: none !important;
    position: absolute !important;
    top: 0% !important;
    left: 0 !important;
    width: 100% !important;
    z-index: 99;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    overflow: visible !important;
  }

  #mainNav.show {
    display: block !important;
    position: absolute !important;
    top: 0% !important;
    left: 0 !important;
    width: 100% !important;
    overflow: visible !important;
  }

  /* 下拉菜单样式 */
  .main_nav .nav_menu {
    flex-direction: column;
    gap: 0;
    padding: 0;
    background: #003e55;
  }

  .main_nav .nav_menu li {
    border-bottom: 1px solid rgba(214, 245, 255, 0.15);
  }

  .main_nav .nav_menu li a {
    display: block;
    padding: 14px 24px;
    font-size: 18px;
    margin-right: 0;
    color: #D6F5FF;
    transform: none;
  }

  .main_nav .nav_menu li a:hover,
  .main_nav .nav_menu li a.active {
    color: #55D4FF;
    background: rgba(0, 112, 150, 0.4);
  }

  /* fixed 状态微调：不需要了，toggle 已在 top_bar 中 */

  /* 小屏取消 main_nav 的 scroll fixed 效果 */
  .main_nav.fixed {
    position: static;
    z-index: auto;
    width: 100%;
    top: auto;
    left: auto;
    background: transparent;
  }

  /* banner_section 取消负 margin-top */
  .banner_section {
    margin-top: 0;
  }

  .banner-swiper {
    height: 420px;
  }

  /* News 左右布局 → 上下 */
  .news-content {
    flex-direction: column;
    gap: 24px;
  }

  .news-main {
    flex: none;
    width: 100%;
  }

  .news-list {
    width: 100%;
  }

  /* Activity swiper 每屏2张 (JS 控制，CSS保证宽度) */
  .activity-slider .swiper-button-prev, .activity-slider .swiper-button-next{
    display: none;
  }
 

  /* Publications 左右布局 → 上下 */
  .publications-content {
    flex-direction: column;
    min-height: auto;
  }

  .publications-list {
    flex: none;
    width: 100%;
  }
  .publications-section{
    background: none;
    background-color: rgba(0, 112, 150, 0.1);
  }
  .publications-section-one {
    background: url("../images/bg_publications.png");
    background-size: auto 100%;
    padding-bottom: 30px;
  }
  .publications-showcase {
    position: static;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
  }

  .showcase-swiper {
    height: 360px;
  }

  /* recruit-links 上下排列 */
  .recruit-links-content {
    flex-direction: column;
    margin-top: 48px;
    gap: 40px;
  }

  .recruit-section {
    flex: none;
    width: 100%;
  }

  .quick-links-section {
    flex: none;
    width: 100%;
    position: static;
  }

  .quick-links-list {
    position: static;
    width: 100%;
  }

  /* Footer 上下排列 */
  .footer-content {
    flex-direction: column;
    gap: 24px;
    align-items: flex-start;
  }

  /* news */
  .bg-news-top{
    padding-top: 0;
    background-position: 0 0;
  }
  /* people */
  .bg-people-top{
    padding-top: 0;
    background-position: 0 0;
  }

 
}

/* -----------------------------------------------
   ≤768px — 平板竖屏：进一步压缩
----------------------------------------------- */
@media (max-width: 768px) {
  /* Header：hamburger + logo 同行，搜索区换行 */
  .top_content {
    flex-wrap: nowrap;
    gap: 12px;
    flex-direction: row;
    align-items: center;
  }

  .nav-toggle {
    flex-shrink: 0;
  }


  .header_right {
    padding-top: 0;
    width: 100%;
    justify-content: flex-end;
  }

  .logo_name {
    display: none;
  }

  .logo_img {
    width: 60px;
  }

  .header_right {
    padding-top: 0;
    width: 100%;
    justify-content: flex-end;
  }

  /* radian 装饰图移出屏幕时隐藏 */
  .radian_img {
    display: none;
  }

  /* Nav 菜单改为自动换行 */
  .nav_menu {
    flex-wrap: wrap;
    gap: 4px 0;
  }

  .nav_menu li a {
    font-size: 16px;
    margin-right: 32px;
  }

  .banner-swiper {
    height: 300px;
  }


  /* Activity 按钮移到内侧，避免超出屏幕 */
  .activity-slider .swiper-button-prev,.activity-slider .swiper-button-next {
    display: none;
  }
  /* Activity 卡片 */
  .activity-card img {
    height: 180px;
  }

  /* news-row 移除固定缩略图尺寸 */
  .news-row .news-item-img {
    width: 100px;
    height: 65px;
  }

  /* Publications */
  .publications-section{
    background: none;
    background-color: rgba(0, 112, 150, 0.1);
  }
  .publications-section-one {
    background: url("../images/bg_publications.png");
    background-size: auto 100%;
    padding-bottom: 30px;
  }

  .pub-item {
    padding: 16px 16px 12px 16px;
  }

  /* Recruit cards 上下排列 */
  .recruit-cards {
    flex-direction: column;
    gap: 20px;
  }

  .recruit-card {
    width: 100%;
    max-width: 400px;
  }

  /* Footer */
  .footer {
    padding: 48px 0 60px;
  }

  .footer-info p {
    font-size: 16px;
    line-height: 32px;
  }

  .footer-social span {
    font-size: 16px;
  }

  .page-btn {
    min-width: 40px;
    height: 40px;
    font-size: 13px;
    padding: 0 8px;
  }

  .page-input {
    width: 50px;
    height: 40px;
    font-size: 13px;
  }
  .page-go{
    width: 50px;
  }

  /* people */
  .people-list-page{
    padding: 0 24px;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .people-detail-info{
    flex-direction: column;
    align-items: center;
  }
  .people-info-wrap{
    width: 310px;
    padding:20px 30px 30px;
    align-items: center;
  }
  .people-col-email{
    margin-top:20px;
  }

  /* people detail */
  .rich-text p{
    color:#3B3B3B;
    font-size: 18px;
    line-height:44px;
  }

  /* news detail */
  .news-detail-title {
    font-size: 24px;
  }
  .news-detail-meta {
    font-size: 16px;
    gap: 24px;
  }

  /*  */
  .news-detail-date{
    font-size:20px;
  }

   /* research */
  .research-list-page{
    flex-direction: column;
  }
  .research-nav{
    flex-direction: row;
    width: 100%;
    height:100px;
  }
  .research-nav::before{
    width: 100%;
    height: 8px;
    left:0;
  }
  .research-item{
    height:62px;
    width:calc(100% / 6);
    justify-content: center;
    align-items: center;
    padding-left:0;
    background-position:0 -62px;
    font-size:18px;
  }
  .research-active{
    background-position:0 0;
    width:calc(100% / 6);
    font-size:20px;
  }
  .research-item:hover{
    font-size:20px;
    width:calc(100% / 6);
    background-position:0 center;
  }
  .research-article-title{
    font-size: 24px;
  }
  .research-article-desc{
    font-size:16px;
  }
  .news-pagination-wrap{
    margin-top: 20px;
  }
}

/* -----------------------------------------------
   ≤576px — 手机横屏：单列布局
----------------------------------------------- */
@media (max-width: 576px) {
  .logo_name {
    width: 200px;
  }

  .logo_img {
    width: 50px;
  }

  .logo {
    gap: 10px;
    padding-top: 0;
  }

  .search_box {
    width: 140px;
    height: 32px;
    padding: 2px 4px 2px 12px;
  }

  .search_box input,
  .search_box input::placeholder {
    font-size: 13px;
  }

  .search_btn {
    width: 28px;
    height: 28px;
  }

  .nav_menu li a {
    font-size: 14px;
    margin-right: 20px;
  }

  .banner-swiper {
    height: 220px;
  }

  /* news-row 改为上下结构（文字在上，图片在下） */
  .news-row {
    flex-direction: column;
    gap: 12px;
    padding: 14px 0;
  }

  .news-row .news-item-img {
    width: 100%;
    height: 160px;
    object-fit: cover;
  }

  .activity-swiper {
    padding-bottom: 60px;
  }

  .activity-card img {
    height: 160px;
  }

  .showcase-swiper {
    height: 280px;
  }

  .footer-info p {
    font-size: 14px;
    line-height: 28px;
  }

  .footer {
    padding: 36px 0 48px;
  }

  /* news-list-page 移动端适配 */
  .news-list-item img {
    height: 160px;
  }

  .news-list-title {
    font-size: 15px;
    flex: 1;
    min-width: 0;
  }

  .news-list-desc {
    font-size: 13px;
  }

  .news-list-date {
    font-size: 13px;
  }

  .news-list-divider {
    margin: 0 8px;
  }

  .news-pagination-wrap{
    margin-top: 0px;
  }
  
  .page-btn {
    min-width: 32px;
    height: 32px;
    font-size: 13px;
    padding: 0 8px;
  }

  .page-input {
    width: 42px;
    height: 32px;
    font-size: 13px;
  }
  .page-go{
    width: 42px;
  }

  /* people */
  .people-list-page{
    padding: 0 24px;
    grid-template-columns: repeat(1, 1fr);
    gap: 24px;
  }

  /* news detail */
  .news-detail-wrap {
    padding-bottom: 40px;
  }
  .news-detail-title {
    font-size: 20px;
    margin-bottom: 20px;
  }
  .news-detail-meta {
    font-size: 14px;
    gap: 16px;
    flex-direction: column;
    align-items: flex-start;
  }
  .news-detail-divider {
    margin-bottom: 24px;
  }
}

/* -----------------------------------------------
   ≤480px — 手机竖屏：最小屏幕优化
----------------------------------------------- */
@media (max-width: 480px) {
  /* Header 极度压缩 */
  .top_content {
    gap: 8px;
  }

  .logo_name {
    width: 160px;
  }

  .logo_img {
    width: 44px;
  }

  .logo {
    gap: 8px;
    padding-top: 0;
  }

  .lang-switch a,
  .lang-switch span {
    font-size: 12px;
  }

  .search_box {
    width: 120px;
    height: 30px;
  }

  .search_box input,
  .search_box input::placeholder {
    font-size: 12px;
  }

  /* 导航字体再缩小 */
  .nav_menu li a {
    font-size: 13px;
    margin-right: 14px;
  }

  .banner-swiper {
    height: 180px;
  }

  /* 新闻主图高度收缩 */
  .main_img {
    height: 200px;
  }

  .toggle_img {
    top: 148px;
  }

  .news-date,
  .news-item-date {
    font-size: 14px;
  }

  /* Activity 卡片 */
  .activity-card img {
    height: 140px;
  }

  .activity-title {
    font-size: 15px;
  }

  /* Publications */
  .pub-date {
    font-size: 14px;
  }

  .showcase-swiper {
    height: 220px;
  }

  /* Footer */
  .footer {
    padding: 28px 0 36px;
  }

  .footer-info p {
    font-size: 13px;
    line-height: 24px;
  }

  .footer-social img {
    width: 48px;
    height: 48px;
  }

  .news-list-item img {
    height: 140px;
  }

  .news-list-title {
    font-size: 14px;
    margin-bottom: 0;
  }

  .news-list-desc {
    font-size: 12px;
    -webkit-line-clamp: 2;
  }

  .news-list-divider {
    margin: 0 6px;
  }
  .news-pagination-wrap{
    margin-top: 0px;
  }
 
  .page-btn {
    min-width: 32px;
    height: 32px;
    font-size: 13px;
    padding: 0 8px;
  }

  .page-input {
    width: 42px;
    height: 32px;
    font-size: 13px;
  }
  .page-go{
    width: 42px;
  }
 
}