/* CSS变量定义 - 全局主题和样式配置 */
:root {

  /* 颜色变量 - 主色调 */
  --primary-color: #1f6f8b;  /* 主色调 */
  --primary-dark: #019eff;   /* 深色主色调 */

  
  /* 文字颜色变量 */
  --text-main: #17202a;      /* 主要文字颜色 */
  --text-secondary: #000000; /* 次要文字颜色 */

  
  /* 背景颜色变量 */
  --bg-main: #f6f8f9;        /* 主背景色 */
  --bg-card: #ffffff;        /* 卡片背景色 */
  --bg-section: #edf2f5;     /* 区块背景色 */

  
  /* 边框和阴影变量 */
  --border-color: #dfe7ec;   /* 边框颜色 */
  --shadow-soft: 0 12px 28px rgba(21, 59, 82, 0.08);  /* 柔和阴影效果 */
  --shadow-medium: 0 20px 46px rgba(21, 59, 82, 0.14); /* 中等阴影效果 */

  
  /* 布局变量 */
  --container-width: 1180px;  /* 容器最大宽度 */
  --radius-card: 8px;        /* 卡片圆角半径 */

  
  /* 过渡动画变量 */
  --transition-fast: 180ms ease;         /* 快速过渡时间 */
  --transition-base: 240ms ease;         /* 基础过渡时间 */
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);     /* 缓出动画曲线 */
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1); /* 缓入缓出动画曲线 */

  
  /* 特殊动画时长变量 */
  --motion-press: 120ms;     /* 按压动画时长 */
  --motion-popover: 180ms;   /* 弹出框动画时长 */
  --motion-card: 220ms;      /* 卡片动画时长 */
}

* {
  box-sizing: border-box;
}

/* 全局HTML元素样式设置 */
html {
  /* 设置页面滚动行为为平滑滚动，使滚动过程更加流畅 */
  scroll-behavior: smooth;
  /* 设置滚动条顶部内边距，防止内容被固定导航栏遮挡 */
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  font-family: "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.72;
  color: var(--text-main);
  background:
    repeating-linear-gradient(90deg, rgba(21, 59, 82, 0.018) 0, rgba(21, 59, 82, 0.018) 1px, transparent 1px, transparent 54px),
    linear-gradient(180deg, #ffffff 0, var(--bg-main) 36%, #f3f6f8 100%);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

a,
button {
  transition:
    color var(--motion-press) var(--ease-out),
    background var(--motion-press) var(--ease-out),
    border-color var(--motion-press) var(--ease-out),
    box-shadow var(--motion-press) var(--ease-out),
    transform var(--motion-press) var(--ease-out);
}

:focus-visible {
  outline: 3px solid rgba(31, 111, 139, 0.32);
  outline-offset: 3px;
}

p,
li {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  text-wrap: balance;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.navbar {
  width: min(var(--container-width), 92%);
  min-height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-weight: 700;
  font-size: 24px;
  color: rgba(3, 106, 161, 0.88);
  white-space: nowrap;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
}

.nav-list a:hover,
.nav-list a:focus-visible,
.nav-dropdown-toggle:hover,
.nav-dropdown-toggle:focus-visible {
  color: var(--primary-color);
}

.nav-list a[aria-current="page"] {
  color: var(--primary-dark);
  font-weight: 700;
}

.nav-dropdown.is-current .nav-dropdown-toggle {
  color: var(--primary-dark);
  font-weight: 700;
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
}

.nav-dropdown-toggle::after {
  content: "▾";
  margin-left: 6px;
  font-size: 12px;
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 18px);
  left: 50%;
  min-width: 168px;
  display: grid;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 10px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-medium);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-50%) translateY(-6px) scale(0.98);
  transform-origin: top center;
  transition:
    opacity var(--motion-popover) var(--ease-out),
    visibility var(--motion-popover) var(--ease-out),
    transform var(--motion-popover) var(--ease-out);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu,
.nav-dropdown.is-open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0) scale(1);
}

.nav-dropdown-menu a {
  display: block;
  padding: 8px 10px;
  border-radius: 6px;
  white-space: nowrap;
}

.nav-dropdown-menu a:hover,
.nav-dropdown-menu a:focus-visible {
  background: #e8f2f5;
}

.menu-button {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: #ffffff;
  color: var(--text-main);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

.menu-button:active,
.nav-dropdown-toggle:active,
.primary-button:active,
.secondary-button:active,
.card-link:active {
  transform: scale(0.97);
}

.hero {
  min-height: 680px;
  display: flex;
  align-items: center;
  background-color: var(--primary-dark);
  background-image:
    linear-gradient(
      120deg,
      rgba(11, 32, 46, 0.72),
      rgba(31, 111, 139, 0.42)
    ),
    url("images/hero-bg.jpg");
  background-size: cover;
  background-position: 58% center;
  background-repeat: no-repeat;
}

.hero-text-panel {
  max-width: 780px;
  padding: 30px;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.22);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.24);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.hero-content,
.page-hero-content,
.section {
  width: min(var(--container-width), 92%);
  margin: 0 auto;
}

.hero-content {
  padding: 96px 0 88px;
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 48px;
  align-items: center;
}

.hero-main {
  min-width: 0;
}

.eyebrow,
.section-label {
  margin: 0 0 10px;
  color: var(--primary-color);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.hero .eyebrow,
.hero h1,
.hero .hero-text {
  color: #ffffff;
}

.hero-research-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 22px;
  max-width: 860px;
}

.hero-research-chip {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 16px;
  border-radius: 999px;
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.26);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.18);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform 0.22s ease, background 0.22s ease, border-color 0.22s ease;
}

.hero-research-chip:hover,
.hero-research-chip:focus-visible {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.52);
}

.hero h1 {
  max-width: 860px;
  margin: 0 0 22px;
  font-size: clamp(38px, 5.6vw, 68px);
  line-height: 1.08;
  font-weight: 800;
}

.hero-text {
  max-width: 820px;
  margin: 0;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.9);
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 6px;
  font-weight: 600;
}

.primary-button {
  background: var(--primary-color);
  color: #ffffff;
  box-shadow: 0 12px 26px rgba(31, 111, 139, 0.22);
}

.primary-button:hover,
.primary-button:focus-visible {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.secondary-button {
  border: 1px solid rgba(255, 255, 255, 0.78);
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.secondary-button:hover,
.secondary-button:focus-visible {
  background: rgba(255, 255, 255, 0.22);
  border-color: #ffffff;
  transform: translateY(-2px);
}

.glass-card {
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.24);
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.2);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.hero-glass-panel {
  display: grid;
  gap: 14px;
  padding: 24px;
  border-radius: 10px;
}

.hero-panel-item {
  padding: 16px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.hero-panel-item span,
.card-kicker {
  display: inline-block;
  margin-bottom: 6px;
  color: var(--primary-color);
  font-size: 13px;
  font-weight: 700;
}

.hero-panel-item span {
  color: rgba(255, 255, 255, 0.72);
}

.hero-panel-item strong {
  display: block;
  color: #ffffff;
  font-size: 17px;
}

.hero-panel-item p {
  margin: 5px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.page-hero {
  background: #ffffff;
  border-bottom: 1px solid var(--border-color);
}

.page-hero-content {
  padding: 72px 0 56px;
}

.page-hero h1 {
  margin: 0 0 14px;
  font-size: 42px;
  line-height: 1.2;
}

.page-hero p {
  max-width: 760px;
  margin-top: 0;
  color: var(--text-secondary);
}

.section {
  padding: 72px 0;
}

.section-gray {
  width: 100%;
  max-width: none;
  padding-left: max(4%, calc((100% - var(--container-width)) / 2));
  padding-right: max(4%, calc((100% - var(--container-width)) / 2));
  background: var(--bg-section);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-title {
  max-width: 760px;
  margin-bottom: 30px;
}

.section-title h2 {
  margin: 0 0 12px;
  font-size: 32px;
  line-height: 1.25;
}

.section-title p {
  margin-top: 0;
  color: var(--text-secondary);
}

.intro-section {
  padding-top: 78px;
}

.intro-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.intro-item {
  padding: 22px 0 0;
  border-top: 2px solid var(--primary-color);
}

.intro-item h3 {
  margin: 0 0 10px;
}

.intro-item p {
  margin: 0;
  color: var(--text-secondary);
}

.portal-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.portal-card,
.preview-card,
.split-card,
.cta-card {
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
}

.portal-card,
.preview-card {
  padding: 24px;
  transition:
    transform var(--motion-card) var(--ease-out),
    box-shadow var(--motion-card) var(--ease-out),
    border-color var(--motion-card) var(--ease-out),
    background var(--motion-card) var(--ease-out);
}

.portal-card:hover,
.portal-card:focus-within,
.preview-card:hover,
.preview-card:focus-within,
.item-card:hover,
.item-card:focus-within {
  transform: translateY(-4px);
  border-color: rgba(31, 111, 139, 0.34);
  box-shadow: var(--shadow-medium);
}

.portal-card h3,
.preview-card h3 {
  margin: 0 0 12px;
}

.portal-card p,
.preview-card p {
  margin: 0 0 18px;
  color: var(--text-secondary);
}

.card-link {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  color: var(--primary-color);
  font-weight: 700;
}

.card-link:hover,
.card-link:focus-visible {
  color: var(--primary-dark);
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.focus-card {
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--motion-card) var(--ease-out),
    box-shadow var(--motion-card) var(--ease-out),
    border-color var(--motion-card) var(--ease-out);
}

.focus-card:hover,
.focus-card:focus-within {
  transform: translateY(-4px);
  border-color: rgba(31, 111, 139, 0.34);
  box-shadow: var(--shadow-medium);
}

/* ==============================
   首页研究方向图片卡片
   适用位置：index.html 中的“研究方向”三个卡片
   图片格式：JPG
   ============================== */

/* 研究方向卡片顶部图片区域
   作用：
   1. 作为图片容器。
   2. 控制图片高度。
   3. 隐藏图片放大时溢出的边缘。
   4. 保留 hover 时显示“阅读更多”的交互层。 */
.focus-visual {
  position: relative;
  display: flex;
  min-height: 220px;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  background: #0f172a;
  overflow: hidden;
}

/* 研究方向图片本体
   作用：
   1. position: absolute 让图片铺满整个 focus-visual 容器。
   2. object-fit: cover 让图片完整覆盖容器，必要时裁切边缘。
   3. object-position: center 让图片默认居中显示。
   4. transform 和 transition 用于 hover 时轻微放大。 */
.focus-visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
  transform: scale(1.02);
  transition: transform 0.32s ease, filter 0.32s ease;
}

/* 鼠标停留时图片轻微放大
   说明：
   1. scale(1.08) 不宜过大，否则图片会显得浮夸。
   2. saturate(1.08) 轻微提高饱和度，使 hover 更明显。 */
.focus-visual:hover img,
.focus-visual:focus-visible img {
  transform: scale(1.08);
  filter: saturate(1.08);
}

/* 图片遮罩层
   作用：
   1. 压暗图片底部和局部区域。
   2. 保证“阅读更多”按钮在不同图片亮度下仍然清晰。
   3. 不需要额外写 HTML，使用伪元素生成。 */
.focus-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(15, 23, 42, 0.04), rgba(15, 23, 42, 0.62)),
    radial-gradient(circle at 30% 18%, rgba(255, 255, 255, 0.18), transparent 34%);
}

/* 图片内部细边框
   作用：
   1. 增强图片区域的精致感。
   2. 与当前网站的学术卡片风格保持一致。 */
.focus-visual::after {
  content: "";
  position: absolute;
  inset: 18px;
  z-index: 1;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 14px;
  opacity: 0.72;
  transition: opacity 0.24s ease, transform 0.24s ease;
}

/* 阅读更多按钮
   初始状态：
   1. opacity: 0 表示默认隐藏。
   2. transform: translateY(8px) 表示按钮稍微下移。
   3. hover 后再出现，形成轻量交互。 */
.focus-visual span {
  position: relative;
  z-index: 2;
  display: inline-flex;
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.14);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.24s ease, transform 0.24s ease;
}

/* hover 后内部边框略微收缩 */
.focus-visual:hover::after,
.focus-visual:focus-visible::after {
  opacity: 1;
  transform: scale(0.97);
}

/* hover 后显示“阅读更多”按钮 */
.focus-visual:hover span,
.focus-visual:focus-visible span {
  opacity: 1;
  transform: translateY(0);
}

.focus-body {
  padding: 24px;
}

.focus-body h3 {
  margin: 0 0 12px;
}

.focus-body p {
  margin: 0;
  color: var(--text-secondary);
}

.output-preview-list {
  display: grid;
  gap: 18px;
}

.publication-board {
  display: grid;
  gap: 22px;
}

/* ==============================
   成果分享分组布局
   修改目标：
   1. 小标题不再单独占据左侧一列。
   2. 小标题作为不同成果组之间的分隔标题。
   3. 标题和成果列表位于同一列。
   ============================== */

/* 成果分享每个分组 */
.publication-group {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  align-items: start;
}

/* 成果分享分组标题
   说明：
   1. 不再使用 sticky。
   2. 不再作为左侧栏。
   3. 通过 ::after 生成右侧分隔线。 */
.publication-group h3 {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 18px 0 4px;
  color: var(--primary-dark);
  font-size: 24px;
  line-height: 1.35;
}

/* 分组标题右侧分隔线
   作用：作为不同成果类别之间的视觉分隔 */
.publication-group h3::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(
    90deg,
    rgba(37, 99, 235, 0.35),
    rgba(226, 232, 240, 0.2)
  );
}

.publication-group-wide {
  margin-top: 6px;
}

.paper-list {
  display: grid;
  gap: 14px;
}

.paper-card {
  position: relative;
  display: block;
  padding: 24px 72px 24px 26px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--motion-card) var(--ease-out),
    box-shadow var(--motion-card) var(--ease-out),
    border-color var(--motion-card) var(--ease-out),
    background var(--motion-card) var(--ease-out);
}

.paper-card::after {
  content: "›";
  position: absolute;
  top: 50%;
  right: 24px;
  display: flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  color: var(--text-main);
  font-size: 34px;
  line-height: 1;
  transform: translateY(-50%);
}

.paper-card:hover,
.paper-card:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(31, 111, 139, 0.34);
  box-shadow: var(--shadow-medium);
}

.paper-card:active,
.focus-card:active,
.portal-card:active,
.preview-card:active,
.team-directory-card:active {
  transform: translateY(-1px) scale(0.99);
}

.paper-meta {
  display: block;
  margin-bottom: 14px;
  color: #6b6258;
  font-size: 16px;
  font-weight: 700;
}

.paper-card strong {
  display: block;
  color: var(--text-main);
  font-size: 21px;
  line-height: 1.45;
}

.paper-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.paper-tags span {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 6px;
  background: #e2f0f4;
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 700;
}

.paper-card-featured {
  border-color: rgba(37, 99, 235, 0.42);
}

/* ==============================
   专著与图集模块
   结构：左侧图片占位 + 右侧内容说明
   ============================== */

/* 专著与图集列表 */
.book-atlas-list {
  display: grid;
  gap: 18px;
}

/* 专著与图集卡片
   说明：
   1. 左侧 220px 为图片占位区。
   2. 右侧为标题、类型和说明文字。
   3. 使用半透明白色背景，保持与团队成员卡片类似的轻玻璃效果。 */
.book-atlas-card {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px;
  align-items: stretch;
  padding: 24px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* 图片占位区
   后续替换真实图片时，可将 span 换为 img */
.book-atlas-cover {
  min-height: 170px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed rgba(37, 99, 235, 0.42);
  border-radius: 8px;
  color: var(--primary-dark);
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(255, 255, 255, 0.72)),
    radial-gradient(circle at 20% 20%, rgba(56, 189, 248, 0.22), transparent 38%);
  font-weight: 700;
}

/* 右侧文字区 */
.book-atlas-body {
  align-self: center;
}

.book-atlas-body h3 {
  margin: 0 0 12px;
  font-size: 24px;
}

.book-atlas-body p {
  margin: 0;
  color: var(--text-secondary);
}

/* ==============================
   首页团队成员横向展示
   适用位置：index.html 首页 Team 区域
   设计目标：
   1. 五位成员横向等距排列。
   2. 首页只显示头像、姓名、职称。
   3. 鼠标悬停时卡片上浮，头像轻微放大。
   ============================== */

/* 首页团队成员整体网格
   repeat(5, 1fr) 表示桌面端五列等宽排列 */
.home-team-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  gap: 22px;
}

/* 单个成员卡片
   说明：
   1. display: block 让整个 a 标签表现为卡片。
   2. text-align: center 让姓名和职称居中。
   3. transition 用于 hover 浮动效果。 */
.home-team-card {
  display: block;
  flex: 0 1 calc((100% - 88px) / 5);
  max-width: calc((100% - 88px) / 5);
  min-width: 0;
  text-align: center;
  color: inherit;
  transition:
    transform var(--motion-card) var(--ease-out),
    filter var(--motion-card) var(--ease-out);
}

/* 鼠标悬停时卡片整体上浮 */
.home-team-card:hover,
.home-team-card:focus-visible {
  transform: translateY(-8px);
}

/* figure 默认会有 margin，这里清除，避免影响等距排列 */
.home-team-figure {
  margin: 0;
}

/* 成员头像外框
   说明：
   1. aspect-ratio: 3 / 4 保持竖向人像比例。
   2. overflow: hidden 让头像放大时不溢出。
   3. box-shadow 和 border 提升头像卡片质感。 */
.home-team-photo {
  position: relative;
  aspect-ratio: 3 / 4;
  width: 100%;
  overflow: hidden;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(226, 232, 240, 0.9);
  box-shadow: var(--shadow-soft);
}

/* 成员头像图片
   object-fit: cover 表示图片铺满头像框，必要时裁切边缘 */
.home-team-photo img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center top;
  transition: transform 0.32s var(--ease-out), filter 0.32s var(--ease-out);
}

/* 鼠标悬停时头像轻微放大 */
.home-team-card:hover .home-team-photo img,
.home-team-card:focus-visible .home-team-photo img {
  transform: scale(1.06);
  filter: saturate(1.05);
}

/* 头像上的细微渐变遮罩
   作用：提升图片层次，避免头像底部过亮或过暗 */
.home-team-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 58%, rgba(15, 23, 42, 0.18));
  opacity: 0;
  transition: opacity 0.24s var(--ease-out);
}

.home-team-card:hover .home-team-photo::after,
.home-team-card:focus-visible .home-team-photo::after {
  opacity: 1;
}

/* 无头像成员的占位样式
   说明：用于陈卓头像暂未准备时显示姓氏首字 */
.home-team-photo-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  background:
    linear-gradient(135deg, rgba(31, 111, 139, 0.16), rgba(255, 255, 255, 0.86)),
    radial-gradient(circle at 22% 18%, rgba(31, 111, 139, 0.22), transparent 36%);
  font-size: 56px;
  font-weight: 800;
}

/* 姓名和职称 */
.home-team-figure figcaption {
  padding-top: 14px;
}

.home-team-figure strong {
  display: block;
  color: var(--text-main);
  font-size: 20px;
  line-height: 1.35;
}

.home-team-figure span {
  display: block;
  margin-top: 4px;
  color: var(--primary-dark);
  font-size: 15px;
  font-weight: 700;
}

.member-list {
  display: grid;
  gap: 18px;
}

.member-card {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  padding: 24px;
  border-radius: var(--radius-card);
}

.glass-member {
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(226, 232, 240, 0.8);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.member-avatar {
  position: relative;
  aspect-ratio: 3 / 4;
  width: 100%;
  padding: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 12px;
  color: var(--primary-dark);
  background: rgba(255, 255, 255, 0.48);
  font-size: 52px;
  font-weight: 700;
  isolation: isolate;
}

.member-avatar::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.28), rgba(255, 255, 255, 0.68)),
    linear-gradient(315deg, rgba(30, 58, 138, 0.18), rgba(148, 163, 184, 0.22));
  filter: blur(18px);
  opacity: 0.7;
}

.member-avatar img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.14);
}

.member-body h3 {
  margin: 0;
  font-size: 24px;
}

.member-title {
  margin: 2px 0 12px;
  color: var(--primary-dark);
  font-weight: 700;
}

.member-body p:last-child {
  margin-bottom: 0;
  color: var(--text-secondary);
}

.member-more-link {
  margin-top: 14px;
}

.team-directory-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.group-member-list {
  display: grid;
  gap: 18px;
}

.group-members-section {
  width: min(1360px, 94%);
}

.group-member-card {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding: 18px 22px;
  border-radius: var(--radius-card);
}

.group-member-portrait {
  position: relative;
  width: 100%;
  min-width: 0;
  min-height: 0;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.76);
  background:
    linear-gradient(135deg, rgba(31, 111, 139, 0.12), rgba(255, 255, 255, 0.78)),
    rgba(255, 255, 255, 0.52);
  color: var(--primary-dark);
  font-weight: 700;
  isolation: isolate;
}

.group-member-portrait::before {
  content: attr(data-image-placeholder);
  position: absolute;
  inset: 8px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 8px;
  border: 1px dashed rgba(31, 111, 139, 0.34);
  border-radius: 10px;
  color: rgba(30, 58, 138, 0.58);
  font-size: 12px;
  line-height: 1.4;
  text-align: center;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.group-member-portrait::after {
  content: "";
  position: absolute;
  inset: -16px;
  z-index: -1;
  background: rgba(31, 111, 139, 0.18);
  filter: blur(18px);
}

.group-member-portrait span {
  position: relative;
  z-index: 1;
}

.group-member-body {
  display: flex;
  min-width: 0;
  flex-direction: column;
}

.group-member-body h3 {
  margin: 0 0 6px;
  color: var(--text-main);
  font-size: 20px;
}

.group-member-body p:last-of-type {
  margin-bottom: 0;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.65;
}

.group-member-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 10px;
}

.external-link-placeholder {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(31, 111, 139, 0.22);
  border-radius: 999px;
  padding: 5px 10px;
  color: var(--primary-dark);
  background: rgba(255, 255, 255, 0.68);
  font-size: 14px;
  cursor: default;
}

.team-directory-card {
  display: grid;
  gap: 6px;
  padding: 24px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--motion-card) var(--ease-out),
    box-shadow var(--motion-card) var(--ease-out),
    border-color var(--motion-card) var(--ease-out);
}

.team-directory-card:hover,
.team-directory-card:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(31, 111, 139, 0.32);
  box-shadow: var(--shadow-medium);
}

.team-directory-card strong {
  color: var(--text-main);
  font-size: 20px;
}

.team-directory-card span {
  color: var(--text-secondary);
}

.member-profile-hero {
  background: linear-gradient(135deg, #ffffff, #eef2f7);
  border-bottom: 1px solid var(--border-color);
}

.member-profile-layout {
  width: min(var(--container-width), 92%);
  margin: 0 auto;
  padding: 72px 0 60px;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 42px;
  align-items: start;
}

.profile-photo-frame {
  position: relative;
  aspect-ratio: 9 / 16;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.58);
  isolation: isolate;
}

.profile-photo-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.26), rgba(255, 255, 255, 0.72)),
    linear-gradient(315deg, rgba(30, 58, 138, 0.16), rgba(148, 163, 184, 0.24));
  filter: blur(14px);
}

.profile-photo-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  border-radius: 8px;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.16);
}

.profile-photo-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  font-size: 72px;
  font-weight: 700;
}
/* 成员个人页右侧简介区
   修改说明：
   1. padding-top 改为 0，使右侧文字与左侧头像顶部对齐。
   2. 详细简介放在 profile-intro 中，统一设置首行缩进。 */
.profile-summary {
  padding-top: 0;
}

.profile-summary h1 {
  margin: 0 0 8px;
  font-size: 46px;
  line-height: 1.2;
}

.profile-role {
  margin: 0 0 18px;
  color: var(--primary-dark);
  font-size: 20px;
  font-weight: 700;
}

.profile-summary p {
  max-width: 820px;
  color: var(--text-secondary);
}
/* 成员个人页顶部简介正文
   说明：
   1. text-indent: 2em 实现中文段落首行缩进。
   2. text-align: justify 使长段落左右边缘更整齐。
   3. margin-top 保持与职称之间的距离。 */
.profile-intro {
  margin-top: 16px;
  text-indent: 2em;
  text-align: justify;
  color: var(--text-secondary);
}

.profile-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 24px;
}

.profile-content {
  display: grid;
  gap: 18px;
}

.profile-block {
  padding: 28px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
}

.profile-block h2 {
  margin: 0 0 14px;
  color: var(--primary-dark);
  font-size: 24px;
}

.profile-block p {
  margin-top: 0;
  color: var(--text-secondary);
}

.profile-list {
  margin: 0;
  padding-left: 20px;
  color: var(--text-secondary);
}

.profile-list li + li {
  margin-top: 8px;
}

.profile-list a {
  color: var(--primary-color);
}

/* ==============================
   新闻模块
   首页采用“学术简报”卡片；新闻列表和详情页采用时间轴风格。
   ============================== */

/* 首页新闻卡片网格 */
.home-news-brief-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr 0.85fr;
  gap: 18px;
}

/* 首页新闻卡片外层 */
.home-news-brief {
  min-height: 260px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--motion-card) var(--ease-out),
    box-shadow var(--motion-card) var(--ease-out),
    border-color var(--motion-card) var(--ease-out);
}

/* 鼠标悬停时轻微上浮 */
.home-news-brief:hover,
.home-news-brief:focus-within {
  transform: translateY(-4px);
  border-color: rgba(31, 111, 139, 0.34);
  box-shadow: var(--shadow-medium);
}

/* 新闻卡片内部链接
   说明：
   display: flex + justify-content: center 用于实现纵向居中。
   gap 控制日期、标签、标题、摘要、链接之间的等距关系。 */
.home-news-brief-link {
  min-height: 100%;
  height: 100%;
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: 12px;
}

.home-news-brief-featured .home-news-brief-link {
  border-left: 4px solid var(--primary-color);
}

.home-news-brief-link:hover,
.home-news-brief-link:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(31, 111, 139, 0.34);
  box-shadow: var(--shadow-medium);
}

.home-news-date {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 700;
}

.home-news-brief h3 {
  margin: 0;
  color: var(--text-main);
  font-size: 20px;
  line-height: 1.42;
  font-weight: 700;
}

.home-news-brief:not(.home-news-brief-featured) h3 {
  font-size: 19px;
}

.home-news-brief p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.72;
}

.news-page-hero {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(237, 242, 245, 0.92)),
    linear-gradient(90deg, rgba(31, 111, 139, 0.08), transparent);
}

/* 重点新闻可略微加强背景层次，但不改变内容结构 */
.home-news-brief-featured {
  background:
    linear-gradient(135deg, rgba(31, 111, 139, 0.08), rgba(255, 255, 255, 0.96)),
    #ffffff;
}

.news-timeline {
  position: relative;
  display: grid;
  gap: 26px;
  padding-left: 34px;
}

.news-timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 116px;
  width: 1px;
  background: linear-gradient(180deg, rgba(31, 111, 139, 0.42), rgba(31, 111, 139, 0.08));
}

.news-timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.news-timeline-date {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2px;
  padding: 12px 0;
  color: var(--primary-dark);
  font-variant-numeric: tabular-nums;
}

.news-timeline-date::after {
  content: "";
  position: absolute;
  top: 24px;
  right: -35px;
  width: 13px;
  height: 13px;
  border: 3px solid #ffffff;
  border-radius: 999px;
  background: var(--primary-color);
  box-shadow: 0 0 0 1px rgba(31, 111, 139, 0.26), 0 8px 18px rgba(21, 59, 82, 0.16);
}

.news-timeline-date span {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
}

.news-timeline-date strong {
  font-size: 22px;
  line-height: 1.1;
}

.news-timeline-card {
  display: grid;
  gap: 12px;
  padding: 26px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--motion-card) var(--ease-out),
    box-shadow var(--motion-card) var(--ease-out),
    border-color var(--motion-card) var(--ease-out);
}

a.news-timeline-card:hover,
a.news-timeline-card:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(31, 111, 139, 0.34);
  box-shadow: var(--shadow-medium);
}

/* 新闻列表页标题字号
   说明：比原先减小一号，减少长标题压迫感。 */
.news-timeline-card h3 {
  margin: 0 0 10px;
  color: var(--text-main);
  font-size: 20px;
  line-height: 1.42;
  font-weight: 700;
}

.news-timeline-card p {
  margin: 0;
  color: var(--text-secondary);
}

.news-timeline-item.is-placeholder {
  opacity: 0.72;
}

/* ==============================
   新闻详情页
   适用页面：news-20260625.html
   修改目标：
   1. 标题居中，字号减小一号。
   2. 正文删除左侧信息栏，只保留一栏。
   3. 图片取消外部边框。
   4. 图片可点击查看大图。
   5. 题注居中。
   ============================== */

/* 新闻详情页整体宽度 */
.news-detail {
  width: min(980px, 92%);
  margin: 0 auto;
}

/* 新闻详情页顶部
   说明：
   1. 标题仍然保持居中。
   2. “返回新闻列表”不再放在居中元信息组里，而是由 .news-detail-back 单独控制。 */
.news-detail-hero {
  padding: 44px 0 22px;
  text-align: center;
}

/* 返回新闻列表
   说明：
   1. width: 100% 让这一行占满新闻详情页标题区宽度。
   2. text-align: left 使“返回新闻列表”靠左。
   3. margin-bottom 控制它与类别/日期之间的距离。 */
.news-detail-back {
  width: 100%;
  margin-bottom: 16px;
  text-align: left;
}

/* 顶部元信息：类别、日期
   说明：
   1. 这里只保留“学术活动”和日期。
   2. 继续居中显示，避免影响新闻标题的居中视觉。 */
.news-detail-meta {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0;
  margin: 9px 0;
}

/* 新闻详情页标题
   修改说明：
   1. 原标题如果较大，可统一调为 34px。
   2. clamp 保证手机端自动缩小。
   3. 不在 HTML 中手动换行，让浏览器自然换行。 */
.news-detail-hero h1 {
  max-width: 900px;
  margin: 0 auto;
  color: var(--text-main);
  font-size: clamp(28px, 3.4vw, 34px);
  line-height: 1.35;
  font-weight: 800;
  text-align: center;
}

/* 新闻正文布局
   修改说明：
   原先如果是左右两栏 grid，block为单栏。 */
.news-detail-layout {
  display: block;
}

.news-detail-aside {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 12px;
  align-self: start;
}

.news-aside-card {
  display: grid;
  gap: 4px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
}

.news-aside-card span {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
}

.news-aside-card strong {
  color: var(--primary-dark);
  font-size: 18px;
  font-variant-numeric: tabular-nums;
}

/* 正文内容 */
.news-article-body {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 15px;
  line-height: 1.3;
}

/* 正文段落
   说明：
   1. 只保留正文自然段。
   2. 不主动换行，不使用 br。
   3. 如果需要首行缩进，可保留 text-indent: 2em。 */
.news-article-body p {
  margin: 5px 0 5px;
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.92;
  text-indent: 2em;
  text-align: justify;
}

/* 新闻图片区域
   修改说明：
   1. 取消外部边框。
   2. 取消外部卡片背景。
   3. 取消外部阴影。
   4. 只保留图片本身。 */
.news-figure {
  margin: 34px 0;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}

/* 图片链接
   说明：
   点击图片后在当前标签页打开原图。 */
.news-figure-link {
  display: block;
  cursor: zoom-in;
}

/* 新闻图片本体 */
.news-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

/* 图片题注
   按你的要求居中设置。 */
.news-figure figcaption {
  margin-top: 10px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
  text-align: center;
}

/* ==============================
   新闻详情页视频
   适用页面：新闻详情页，如 news-20260623.html
   设计目标：
   1. 视频与正文、图片保持同一内容宽度。
   2. 视频不使用外部边框，保持干净的一栏排版。
   3. 视频题注居中显示。
   ============================== */

/* 新闻详情页视频外层
   说明：
   1. 视频放在 .news-article-body 内部后，宽度会自然跟随正文。
   2. margin 左右设为 auto，避免未来视频被单独设置宽度时偏移。
   3. padding、border、box-shadow 设为 0，保持与正文图片一致的干净样式。 */
.news-video {
  width: 100%;
  max-width: 100%;
  margin: 34px auto;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}

/* 新闻详情页视频播放器
   说明：
   1. width: 100% 表示视频铺满正文内容宽度。
   2. aspect-ratio 控制视频显示比例。
   3. 这里使用 16 / 9，适合常见横屏会议视频。
   4. object-fit: contain 表示完整显示视频画面，不裁切人物或字幕。 */
.news-video-player {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  background: #000000;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  object-fit: contain;
}

/* 视频题注
   说明：
   题注格式与图片题注一致，居中显示。 */
.news-video figcaption {
  margin-top: 10px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
  text-align: center;
}
/* 资源链接块样式 */
.link-resource-block {
  margin-top: 36px;  /* 上边距为36像素 */
  padding: 28px;     /* 内边距为28像素 */
  background: #ffffff00;  /* 背景为白色 */
  border: 0;  /* 边框样式 */
  border-radius: 0;  /* 边框圆角 */
  box-shadow: 0;  /* 添加柔和阴影效果 */
}

/* 标题h2样式 */
.link-resource-block h2 {
  margin: 0 0 18px;  /* 上下边距为0，下边距为18像素 */
  color: var(--text-main);  /* 文字颜色为主色 */
  font-size: 22px;  /* 字体大小为22像素 */
}

/* 非第一个h2元素的样式 */
.link-resource-block h2:not(:first-child) {
  margin-top: 30px;  /* 上边距为30像素 */
}

/* 资源标题和来源样式 */
.resource-title,
.resource-source {
  margin: 0 0 12px;  /* 上下边距为0，下边距为12像素 */
  color: var(--text-main);  /* 文字颜色为主色 */
  font-size: 18px;  /* 字体大小为18像素 */
  font-weight: 700;  /* 字体粗细为700 */
}

/* 链接样式 */
.link-resource-block a {
  color: var(--primary-color);  /* 文字颜色为主题色 */
  text-decoration: underline;  /* 添加下划线装饰 */
  text-underline-offset: 3px;  /* 下划线偏移量为3像素 */
  overflow-wrap: anywhere;  /* 允许在任何地方换行 */
}

/* 段落样式 */
.link-resource-block p {
  margin: 0 0 18px;  /* 上下边距为0，下边距为18像素 */
}

.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.split-card {
  padding: 30px;
}

.split-card h2 {
  margin: 0 0 12px;
  font-size: 30px;
  line-height: 1.25;
}

.split-card p {
  color: var(--text-secondary);
}

.compact-news-list {
  display: grid;
  gap: 18px;
  margin: 20px 0;
}

.compact-news-list h3 {
  margin: 0 0 6px;
  font-size: 18px;
}

.compact-news-list p {
  margin: 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card,
.item-card,
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: var(--shadow-soft);
}

.card {
  padding: 26px;
}

.card h3,
.item-card h3,
.contact-card h3 {
  margin-top: 0;
  margin-bottom: 12px;
}

.card p,
.item-card p,
.contact-card p {
  margin-bottom: 0;
  color: var(--text-secondary);
}

.item-list {
  display: grid;
  gap: 18px;
}

.item-card {
  padding: 26px;
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 9px;
  border-radius: 4px;
  background: #dbeafe;
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 600;
}

.contact-card {
  max-width: 720px;
  padding: 26px;
}

.contact-card p {
  margin-top: 8px;
}

.cta-section {
  width: min(var(--container-width), 92%);
  margin: 0 auto;
  padding: 0 0 72px;
}

.cta-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 36px;
  color: #ffffff;
  background-color: var(--primary-dark);
  background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 58, 138, 0.9));
  border-color: rgba(255, 255, 255, 0.16);
}

.cta-card .section-label,
.cta-card h2,
.cta-card p {
  color: #ffffff;
}

.cta-card h2 {
  margin: 0 0 10px;
  font-size: 32px;
  line-height: 1.25;
}

.cta-card p {
  max-width: 680px;
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
}

.cta-card .primary-button {
  flex-shrink: 0;
  background: #ffffff;
  color: var(--primary-dark);
}

.cta-card .primary-button:hover,
.cta-card .primary-button:focus-visible {
  background: #dbeafe;
}

.site-footer {
  padding: 28px 4%;
  text-align: center;
  color: #6b7280;
  background: #ffffff;
  border-top: 1px solid var(--border-color);
}

.site-footer p {
  margin: 0;
}

.reveal-on-scroll {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 360ms var(--ease-out),
    transform 360ms var(--ease-out);
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.focus-card.reveal-on-scroll:nth-child(2),
.preview-card.reveal-on-scroll:nth-child(2),
.team-directory-card.reveal-on-scroll:nth-child(2) {
  transition-delay: 45ms;
}

.focus-card.reveal-on-scroll:nth-child(3),
.preview-card.reveal-on-scroll:nth-child(3),
.team-directory-card.reveal-on-scroll:nth-child(3) {
  transition-delay: 90ms;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal-on-scroll {
    opacity: 1;
    transform: none;
  }
}

@media (hover: none) and (pointer: coarse) {
  .portal-card:hover,
  .preview-card:hover,
  .item-card:hover,
  .focus-card:hover,
  .paper-card:hover,
  .team-directory-card:hover,
  .hero-research-chip:hover {
    transform: none;
  }

  .focus-visual:hover img {
    transform: scale(1.02);
    filter: none;
  }

  .focus-visual:hover span {
    opacity: 0;
    transform: translateY(8px);
  }
}

@media (max-width: 900px) {

  .hero-layout,
  .split-section {
    grid-template-columns: 1fr;
  }

  .card-grid,
  .preview-grid,
  .intro-grid,
  .focus-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .portal-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .team-directory-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  /* 平板端：首页团队成员改为三列，避免五列过窄 */
  .home-team-card {
    flex-basis: calc((100% - 44px) / 3);
    max-width: calc((100% - 44px) / 3);
  }

  .publication-group {
    grid-template-columns: 1fr;
  }

  .publication-group h3 {
    position: static;
  }

  .member-card {
    grid-template-columns: 150px minmax(0, 1fr);
  }

  .member-profile-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 30px;
  }

  .navbar {
    width: min(var(--container-width), 94%);
  }

  .hero-glass-panel {
    max-width: 620px;
  }

  .cta-card {
    align-items: flex-start;
    flex-direction: column;
  }

  .book-atlas-card {
    grid-template-columns: 180px minmax(0, 1fr);
  }

  .home-news-brief-grid {
    grid-template-columns: 1fr;
  }

  .news-detail-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .news-detail-aside {
    position: static;
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 720px) {

  .menu-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-list {
    display: flex;
    position: absolute;
    top: 64px;
    left: 3%;
    right: 3%;
    padding: 16px;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-soft);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px) scale(0.98);
    transform-origin: top center;
    transition:
      opacity var(--motion-popover) var(--ease-out),
      visibility var(--motion-popover) var(--ease-out),
      transform var(--motion-popover) var(--ease-out);
  }

  .nav-list.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0) scale(1);
  }

  .nav-dropdown,
  .nav-dropdown-toggle {
    width: 100%;
  }

  .nav-dropdown-toggle {
    justify-content: space-between;
  }

  .nav-dropdown-menu {
    position: static;
    width: 100%;
    min-width: 0;
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    padding-bottom: 0;
    overflow: hidden;
    border-width: 0;
    box-shadow: none;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-4px) scale(0.99);
    transition:
      max-height var(--motion-popover) var(--ease-out),
      margin-top var(--motion-popover) var(--ease-out),
      padding var(--motion-popover) var(--ease-out),
      opacity var(--motion-popover) var(--ease-out),
      visibility var(--motion-popover) var(--ease-out),
      transform var(--motion-popover) var(--ease-out);
  }

  .nav-dropdown:hover .nav-dropdown-menu,
  .nav-dropdown:focus-within .nav-dropdown-menu {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    padding-bottom: 0;
    border-width: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-4px) scale(0.99);
  }

  .nav-dropdown.is-open .nav-dropdown-menu {
    max-height: 160px;
    margin-top: 8px;
    padding-top: 10px;
    padding-bottom: 10px;
    border-width: 1px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0) scale(1);
  }

  .hero {
    min-height: 460px;
  }

  .hero-content {
    padding: 72px 0 64px;
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero-layout {
    gap: 32px;
  }

  .hero-text {
    font-size: 16px;
  }

  .hero-glass-panel,
  .portal-card,
  .preview-card,
  .split-card,
  .cta-card,
  .focus-body,
  .member-card {
    padding: 22px;
  }

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

  .team-directory-grid {
    grid-template-columns: 1fr;
  }
  /* 手机端：首页团队成员改为两列 */
  .home-team-grid {
    gap: 18px;
  }

  .home-team-card {
    flex-basis: calc((100% - 18px) / 2);
    max-width: calc((100% - 18px) / 2);
  }

  /* 手机端：姓名字号略微降低 */
  .home-team-figure strong {
    font-size: 18px;
  }

  .home-team-figure span {
    font-size: 14px;
  }

  .card-grid,
  .preview-grid,
  .intro-grid,
  .focus-grid,
  .book-atlas-card {
    grid-template-columns: 1fr;
  }

  .home-news-brief {
    min-height: auto;
  }

  .home-news-brief-link,
  .news-timeline-card {
    padding: 22px;
  }

  .home-news-brief h3 {
  font-size: 18px;
  }

  .news-timeline {
    padding-left: 0;
  }

  .news-timeline::before {
    left: 7px;
  }

  .news-timeline-item {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-left: 28px;
  }

  .news-timeline-date {
    padding: 0;
  }

  .news-timeline-date::after {
    top: 8px;
    left: -28px;
    right: auto;
  }

  .news-detail-hero {
    padding: 52px 0 34px;
  }

  .news-detail-layout {
    padding: 34px 0 58px;
  }

  .news-detail-aside {
    grid-template-columns: 1fr;
  }

  .news-article-body p {
    font-size: 16px;
    line-height: 1.86;
  }
  .news-timeline-card h3 {
    font-size: 18px;
  }
  .publication-group {
    gap: 14px;
  }

  .paper-card {
    padding: 22px;
  }

  .paper-card::after {
    display: none;
  }

  .paper-card strong {
    font-size: 18px;
  }

  .member-card,
  .group-member-card {
    grid-template-columns: 1fr;
  }

  .group-member-portrait {
    width: min(260px, 100%);
  }

  .member-avatar {
    max-width: 240px;
  }

  .member-profile-layout {
    grid-template-columns: 1fr;
    padding: 54px 0 46px;
  }

  .profile-photo-frame {
    width: min(260px, 78vw);
  }

  .profile-summary h1 {
    font-size: 34px;
  }

  .page-hero-content {
    padding: 54px 0 42px;
  }

  .page-hero h1 {
    font-size: 34px;
  }

  .section {
    padding: 56px 0;
  }

  .section-title h2 {
    font-size: 28px;
  }
}

/* ==============================
   研究方向页面：交错图文面板
   ============================== */
.research-direction-section {
  width: min(1320px, 92%);
}

.research-direction-list {
  display: grid;
  gap: 34px;
}

.research-direction-panel {
  display: grid;
  grid-template-columns: minmax(320px, 0.92fr) minmax(0, 1.08fr);
  gap: 28px;
  align-items: stretch;
  padding: 22px;
  border: 1px solid rgba(203, 213, 225, 0.86);
  border-radius: var(--radius-card);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(248, 250, 252, 0.92)),
    linear-gradient(90deg, rgba(31, 111, 139, 0.08), transparent);
  box-shadow: var(--shadow-soft);
}

.research-direction-panel.is-reversed .research-direction-media {
  order: 2;
}

.research-direction-panel.is-reversed .research-direction-content {
  order: 1;
}

.research-direction-media {
  position: relative;
  margin: 0;
  display: block;
  align-self: center;
  aspect-ratio: 16 / 9;
  min-height: 0;
  overflow: hidden;
  border-radius: 14px;
  background: #0f172a;
  color: #ffffff;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.18);
}

.research-direction-media img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
  transform: scale(1.015);
  transition: transform 0.32s var(--ease-out), filter 0.32s var(--ease-out);
}

.research-direction-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(15, 23, 42, 0.02), rgba(15, 23, 42, 0.48)),
    radial-gradient(circle at 20% 18%, rgba(255, 255, 255, 0.18), transparent 36%);
}

.research-direction-media span {
  position: absolute;
  right: 18px;
  bottom: 18px;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.28);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.research-direction-media:hover img,
.research-direction-media:focus-visible img {
  transform: scale(1.06);
  filter: saturate(1.08);
}

.research-direction-content {
  max-height: 320px;
  overflow-y: auto;
  padding: 8px 10px 8px 2px;
  scrollbar-width: thin;
  scrollbar-color: rgba(31, 111, 139, 0.42) rgba(226, 232, 240, 0.7);
}

.research-direction-content::-webkit-scrollbar {
  width: 8px;
}

.research-direction-content::-webkit-scrollbar-track {
  background: rgba(226, 232, 240, 0.7);
  border-radius: 999px;
}

.research-direction-content::-webkit-scrollbar-thumb {
  background: rgba(31, 111, 139, 0.42);
  border-radius: 999px;
}

.research-direction-content h3 {
  margin: 4px 0 12px;
  color: var(--text-main);
  font-size: 30px;
  line-height: 1.25;
}

.research-direction-content p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.85;
}

.research-direction-content h4 {
  margin: 24px 0 12px;
  color: var(--primary-dark);
  font-size: 17px;
}

.research-paper-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.research-paper-list a {
  display: block;
  padding: 12px 14px;
  border: 1px solid rgba(203, 213, 225, 0.84);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.55;
  transition: transform var(--motion-card) var(--ease-out), border-color var(--motion-card) var(--ease-out), box-shadow var(--motion-card) var(--ease-out);
}

.research-paper-list a:hover,
.research-paper-list a:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(31, 111, 139, 0.36);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.09);
}
/* 研究方向页面：响应式覆盖 */
@media (max-width: 900px) {
  .research-direction-panel,
  .research-direction-panel.is-reversed {
    grid-template-columns: 1fr;
  }

  .research-direction-panel.is-reversed .research-direction-media,
  .research-direction-panel.is-reversed .research-direction-content {
    order: initial;
  }

  .research-direction-content {
    max-height: none;
    overflow: visible;
    padding: 0;
  }
}

@media (max-width: 720px) {
  .research-direction-section {
    width: min(100% - 32px, 1320px);
  }

  .research-direction-panel {
    gap: 18px;
    padding: 16px;
  }

  .research-direction-content h3 {
    font-size: 24px;
  }

  .research-paper-list a {
    padding: 11px 12px;
  }
}
/* 成果分享页：成果类型标签 */
.outputs-section {
  width: min(1180px, 92%);
}

.outputs-publication-board {
  gap: 28px;
}

.paper-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.output-type-tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 2px 9px;
  border: 1px solid rgba(31, 111, 139, 0.22);
  border-radius: 999px;
  background: rgba(232, 242, 245, 0.92);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
}

.output-type-report {
  border-color: rgba(180, 83, 9, 0.24);
  background: rgba(254, 243, 199, 0.82);
  color: #92400e;
}

.output-type-book {
  border-color: rgba(67, 56, 202, 0.2);
  background: rgba(238, 242, 255, 0.88);
  color: #3730a3;
}

@media (max-width: 720px) {
  .outputs-section {
    width: min(100% - 32px, 1180px);
  }

  .output-type-tag {
    min-height: 22px;
    font-size: 12px;
  }
}