/* ============================================================
   DDW 学术站 — 公共样式（追加层）
   依赖：style.css / bootstrap.min.css / fontawesome.all.min.css
   本文件追加中文字体栈 + 学术站专属区块样式
   ============================================================ */

:root {
  --ddw-primary: #0e4d8c;
  /* 学术深蓝 */
  --ddw-primary-dark: #0a3a6b;
  --ddw-accent: #1f8a70;
  /* 学术绿 */
  --ddw-gold: #c9a227;
  --ddw-bg-light: #f5f8fc;
  --ddw-text: #2b3a4a;
  --ddw-muted: #5b6b7b;
  --ddw-border: #e2e8f0;
}

/* 中文字体栈（Poppins 仅覆盖拉丁/数字，中文回退系统字体） */
body {
  font-family: "Poppins", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--ddw-text);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "Poppins", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
}

/* ---------- 学术站顶部条 ---------- */
.ddw-topbar {
  background: var(--ddw-primary);
  color: #fff;
  padding: 10px 0;
  font-size: 14px;
}

.ddw-topbar a {
  color: #fff;
}

.ddw-topbar .lang-switch {
  text-align: right;
}

.ddw-topbar .lang-switch a {
  display: inline-block;
  padding: 2px 12px;
  border: 1px solid rgba(255, 255, 255, .5);
  border-radius: 3px;
  margin-left: 6px;
  text-decoration: none;
  transition: background .2s;
}

.ddw-topbar .lang-switch a:hover {
  background: rgba(255, 255, 255, .15);
}

/* ---------- 学术站导航 ---------- */
.ddw-nav {
  background: #fff;
  border-bottom: 1px solid var(--ddw-border);
  box-shadow: 0 2px 8px rgba(14, 77, 140, .06);
}

.ddw-nav .navbar-brand {
  font-weight: 700;
  color: var(--ddw-primary);
  font-size: 22px;
}

.ddw-nav .navbar-brand small {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--ddw-muted);
  letter-spacing: 1px;
}

.ddw-nav .nav-link {
  color: var(--ddw-text);
  font-weight: 500;
  font-size: 15px;
  padding: 12px 14px !important;
}

.ddw-nav .nav-link:hover,
.ddw-nav .nav-link.active {
  color: var(--ddw-primary);
}

/* ---------- 学术站页脚 ---------- */
.ddw-footer {
  background: #0b2540;
  color: #c7d4e2;
  padding: 50px 0 0;
  font-size: 14px;
}

.ddw-footer h5 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 18px;
}

.ddw-footer p {
  color: #fff;
  margin-bottom: 18px;
}

.ddw-footer a {
  color: #c7d4e2;
  text-decoration: none;
}

.ddw-footer a:hover {
  color: #fff;
}

.ddw-footer .footer-links li {
  margin-bottom: 8px;
}

.ddw-footer .disclaimer {
  background: rgba(255, 255, 255, .06);
  border-left: 3px solid var(--ddw-gold);
  padding: 14px 18px;
  margin: 24px 0;
  font-size: 13px;
  line-height: 1.7;
}

.ddw-footer .disclaimer strong {
  color: var(--ddw-gold);
}

.ddw-footer .footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
  padding: 16px 0;
  margin-top: 30px;
  font-size: 13px;
  color: #8fa3b8;
}

/* ---------- 页面 Hero ---------- */
.ddw-hero {
  background: linear-gradient(135deg, var(--ddw-primary) 0%, var(--ddw-primary-dark) 100%);
  color: #fff;
  padding: 70px 0 60px;
  position: relative;
  overflow: hidden;
}

.ddw-hero .eyebrow {
  color: var(--ddw-gold);
  letter-spacing: 3px;
  text-transform: uppercase;
  font-size: 13px;
  font-weight: 600;
}

.ddw-hero h1 {
  font-size: 40px;
  font-weight: 700;
  margin: 12px 0 16px;
  color: #fff;
  line-height: 1.3;
}

.ddw-hero p {
  font-size: 17px;
  opacity: .92;
  max-width: 720px;
  line-height: 1.8;
  color: #fff;
}

.ddw-hero .breadcrumb {
  background: transparent;
  margin: 16px 0 0;
}

.ddw-hero .breadcrumb a,
.ddw-hero .breadcrumb-item {
  color: rgba(255, 255, 255, .8);
}

.ddw-hero .breadcrumb-item.active {
  color: #fff;
}

.ddw-hero .breadcrumb-item+.breadcrumb-item::before {
  color: rgba(255, 255, 255, .5);
}

/* ---------- 区块通用 ---------- */
.ddw-section {
  padding: 60px 0;
}

.ddw-section.alt {
  background: var(--ddw-bg-light);
}

.ddw-section .section-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--ddw-primary);
  margin-bottom: 12px;
}

.ddw-section .section-eyebrow {
  color: var(--ddw-accent);
  letter-spacing: 2px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
}

.ddw-section .section-sub {
  color: var(--ddw-muted);
  max-width: 760px;
  line-height: 1.8;
  margin-bottom: 30px;
}

/* ---------- 首页 Hero ---------- */
.ddw-home-hero {
  background: linear-gradient(135deg, #0a3a6b 0%, #0e4d8c 55%, #1565a8 100%);
  color: #fff !important;
  padding: 110px 0 90px;
  position: relative;
}

.ddw-home-hero h1 {
  font-size: 46px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}

.ddw-home-hero p {
  color: #fff;
}

.ddw-home-hero .lead {
  font-size: 19px;
  opacity: .92;
  max-width: 680px;
  line-height: 1.9;
  margin-top: 18px;
}

.ddw-home-hero .hero-cta {
  margin-top: 30px;
}

.ddw-home-hero .btn-ddw {
  background: var(--ddw-gold);
  color: #0b2540;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 4px;
  text-decoration: none;
  display: inline-block;
  transition: transform .2s, box-shadow .2s;
}

.ddw-home-hero .btn-ddw:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, .25);
}

/* ---------- 核心数据条 ---------- */
.ddw-stats {
  background: #fff;
  border-bottom: 1px solid var(--ddw-border);
  padding: 40px 0;
}

.ddw-stat {
  text-align: center;
  padding: 20px;
}

.ddw-stat .num {
  font-size: 46px;
  font-weight: 700;
  color: var(--ddw-primary);
  line-height: 1;
}

.ddw-stat .label {
  color: var(--ddw-muted);
  font-size: 15px;
  margin-top: 10px;
  line-height: 1.6;
}

/* ---------- 四宫格 / 卡片 ---------- */
.ddw-grid-card {
  background: #fff;
  border: 1px solid var(--ddw-border);
  border-radius: 8px;
  padding: 28px;
  height: 100%;
  transition: transform .25s, box-shadow .25s;
}

.ddw-grid-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(14, 77, 140, .12);
}

.ddw-grid-card .icon {
  font-size: 34px;
  color: var(--ddw-accent);
  margin-bottom: 14px;
}

.ddw-grid-card h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--ddw-primary);
  margin-bottom: 10px;
}

.ddw-grid-card p {
  color: var(--ddw-muted);
  font-size: 14px;
  line-height: 1.8;
}

.scientist-role-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.scientist-role-cards > .ddw-grid-card {
  height: auto;
}

.ddw-grid-card a.card-link {
  color: var(--ddw-primary);
  font-weight: 600;
  text-decoration: none;
}

/* ---------- 专家证言卡 ---------- */
.ddw-quote-card {
  background: #fff;
  border: 1px solid var(--ddw-border);
  border-radius: 8px;
  padding: 26px;
  height: 100%;
  position: relative;
}

.ddw-quote-card .quote-mark {
  color: var(--ddw-gold);
  font-size: 40px;
  line-height: 1;
  opacity: .5;
}

.ddw-quote-card .quote {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ddw-text);
  margin: 12px 0 18px;
  font-style: italic;
}

.ddw-quote-card .expert {
  display: flex;
  align-items: center;
}

.ddw-quote-card .expert img {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  object-fit: cover;
  margin-right: 14px;
  border: 2px solid var(--ddw-border);
}

.ddw-quote-card .expert .name {
  font-weight: 600;
  color: var(--ddw-primary);
}

.ddw-quote-card .expert .role {
  font-size: 13px;
  color: var(--ddw-muted);
}

/* ---------- 时间轴 ---------- */
.ddw-timeline {
  position: relative;
  padding-left: 30px;
}

.ddw-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--ddw-border);
}

.ddw-timeline .tl-item {
  position: relative;
  margin-bottom: 26px;
}

.ddw-timeline .tl-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ddw-accent);
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--ddw-accent);
}

.ddw-timeline .tl-year {
  font-weight: 700;
  color: var(--ddw-primary);
  font-size: 16px;
}

.ddw-timeline .tl-title {
  font-weight: 600;
  margin: 4px 0;
}

.ddw-timeline .tl-desc {
  color: var(--ddw-muted);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- FAQ 折叠 ---------- */
.ddw-faq .card {
  border: 1px solid var(--ddw-border);
  margin-bottom: 12px;
  border-radius: 6px;
}

.ddw-faq .card-header {
  background: #fff;
  padding: 0;
}

.ddw-faq .card-header .btn {
  width: 100%;
  text-align: left;
  font-weight: 600;
  color: var(--ddw-primary);
  padding: 16px 20px;
  text-decoration: none;
  font-size: 15px;
}

.ddw-faq .card-header .btn .fa {
  float: right;
  color: var(--ddw-accent);
}

.ddw-faq .card-body {
  color: var(--ddw-muted);
  line-height: 1.8;
  font-size: 14px;
}

/* ---------- 论文列表 ---------- */
.ddw-paper {
  background: #fff;
  border: 1px solid var(--ddw-border);
  border-left: 4px solid var(--ddw-accent);
  border-radius: 6px;
  padding: 18px 22px;
  margin-bottom: 14px;
}

.ddw-paper .paper-year {
  display: inline-block;
  background: var(--ddw-primary);
  color: #fff;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 3px;
  margin-right: 8px;
}

.ddw-paper .paper-title {
  font-weight: 600;
  color: var(--ddw-text);
  font-size: 15px;
}

.ddw-paper .paper-meta {
  color: var(--ddw-muted);
  font-size: 13px;
  margin-top: 6px;
  line-height: 1.7;
}

.ddw-paper .paper-links {
  margin-top: 8px;
}

.ddw-paper .paper-links a {
  font-size: 13px;
  margin-right: 14px;
  color: var(--ddw-primary);
  text-decoration: none;
}

/* ---------- 图书卡 ---------- */
.ddw-book {
  background: #fff;
  border: 1px solid var(--ddw-border);
  border-radius: 8px;
  overflow: hidden;
  height: 100%;
  transition: transform .25s, box-shadow .25s;
}

.ddw-book:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(14, 77, 140, .12);
}

.ddw-book .book-cover {
  position: relative;
  height: 300px;
  background: linear-gradient(135deg, var(--ddw-primary), var(--ddw-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 22px;
  text-align: center;
  padding: 20px;
  overflow: hidden;
}

.ddw-book .book-cover.book-cover--accent {
  background: linear-gradient(135deg, var(--ddw-accent), #145a4a);
}

.ddw-book .book-cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

.ddw-book .book-cover .book-cover-fallback {
  position: relative;
  z-index: 0;
}

.ddw-book .book-body {
  padding: 22px;
}

.ddw-book .book-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ddw-primary);
}

.ddw-book .book-body .publisher {
  color: var(--ddw-muted);
  font-size: 13px;
  margin: 6px 0 12px;
}

.ddw-book .book-body p {
  color: var(--ddw-muted);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 联系信息卡 ---------- */
.ddw-contact-card {
  background: #fff;
  border: 1px solid var(--ddw-border);
  border-radius: 8px;
  padding: 26px;
  height: 100%;
  text-align: center;
}

.ddw-contact-card .icon {
  font-size: 32px;
  color: var(--ddw-accent);
  margin-bottom: 12px;
}

.ddw-contact-card h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--ddw-primary);
}

.ddw-contact-card p {
  color: var(--ddw-muted);
  font-size: 14px;
  margin: 8px 0 0;
  line-height: 1.7;
}

/* ---------- 联系明细卡片 ---------- */
.ddw-detail-card {
  background: #fff;
  border: 1px solid var(--ddw-border);
  border-radius: 8px;
  padding: 30px;
  height: 100%;
  box-shadow: 0 4px 15px rgba(14, 77, 140, .05);
  transition: transform .25s, box-shadow .25s;
}

.ddw-detail-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(14, 77, 140, .1);
}

.ddw-detail-card .card-badge {
  display: inline-block;
  background: rgba(14, 77, 140, .08);
  color: var(--ddw-primary);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 14px;
}

.ddw-detail-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ddw-primary);
  margin-bottom: 20px;
  border-bottom: 2px solid var(--ddw-bg-light);
  padding-bottom: 12px;
}

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

.ddw-contact-list li {
  position: relative;
  padding-left: 36px;
  margin-bottom: 18px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ddw-text);
}

.ddw-contact-list li:last-child {
  margin-bottom: 0;
}

.ddw-contact-list li i {
  position: absolute;
  left: 0;
  top: 4px;
  font-size: 18px;
  color: var(--ddw-accent);
  width: 24px;
  text-align: center;
}

.ddw-contact-list .label {
  font-weight: 600;
  color: var(--ddw-primary);
  display: block;
  font-size: 13px;
  margin-bottom: 2px;
}

.ddw-contact-list a {
  color: var(--ddw-primary);
  text-decoration: none;
  transition: color .2s;
}

.ddw-contact-list a:hover {
  color: var(--ddw-accent);
  text-decoration: underline;
}

/* ---------- 学术声明强调块 ---------- */
.ddw-note {
  background: #fff8e6;
  border: 1px solid #f0e0b0;
  border-left: 4px solid var(--ddw-gold);
  padding: 16px 20px;
  border-radius: 4px;
  font-size: 14px;
  line-height: 1.8;
  color: #6b5a1e;
  margin: 24px 0;
}

/* ---------- 数据表格 ---------- */
.ddw-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.ddw-table th,
.ddw-table td {
  border: 1px solid var(--ddw-border);
  padding: 12px 16px;
  text-align: left;
  font-size: 14px;
}

.ddw-table th {
  background: var(--ddw-primary);
  color: #fff;
  font-weight: 600;
}

.ddw-table tr:nth-child(even) {
  background: var(--ddw-bg-light);
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .ddw-home-hero h1 {
    font-size: 32px;
  }

  .ddw-hero h1 {
    font-size: 30px;
  }

  .ddw-section {
    padding: 40px 0;
  }

  .ddw-section .section-title {
    font-size: 24px;
  }

  .ddw-stat .num {
    font-size: 36px;
  }
}

/* ---------- 历届大会（图文版） ---------- */
/* 图 55% : 文 45% 左右交错；图库 = 1 主图 + 辅图列（默认 2 张，增减辅图自动堆叠/横排） */
.ddw-conf-list {
  display: grid;
  gap: 32px;
  margin-top: 28px;
}

.ddw-conf-item {
  display: grid;
  grid-template-columns: 55fr 45fr;
  background: #fff;
  border: 1px solid var(--ddw-border);
  border-radius: 8px;
  overflow: hidden;
  transition: transform .25s, box-shadow .25s;
}

.ddw-conf-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(14, 77, 140, .12);
}

/* 左右交错：偶数项图片在右、文字在左 */
.ddw-conf-item:nth-child(even) .ddw-conf-media {
  order: 2;
}

.ddw-conf-item:nth-child(even) .ddw-conf-body {
  order: 1;
}

/* 图库区：固定最小高度，图库绝对定位填满（图片不参与高度计算，保证五届卡片高度一致） */
.ddw-conf-media {
  position: relative;
  margin: 0;
  min-width: 0;
  min-height: 400px;
}

.ddw-conf-gallery {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  grid-template-rows: minmax(0, 1fr);
  gap: 8px;
  background: var(--ddw-bg-light);
}

.ddw-conf-main {
  min-width: 0;
}

.ddw-conf-main img,
.ddw-conf-side img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ddw-conf-side {
  display: grid;
  grid-auto-rows: minmax(0, 1fr);
  gap: 8px;
  min-width: 0;
}

/* 文字区 */
.ddw-conf-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: 32px 36px;
}

.ddw-conf-tag {
  margin: 0 0 6px;
  color: var(--ddw-accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
}

.ddw-conf-name {
  margin: 0 0 14px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ddw-primary);
}

.ddw-conf-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 28px;
  margin: 0 0 16px;
}

.ddw-conf-meta dt {
  margin-bottom: 2px;
  color: var(--ddw-muted);
  font-size: 12px;
  font-weight: 600;
}

.ddw-conf-meta dt i {
  margin-right: 6px;
  color: var(--ddw-accent);
}

.ddw-conf-meta dd {
  margin: 0;
  color: var(--ddw-text);
  font-size: 14px;
  font-weight: 600;
}

.ddw-conf-desc {
  margin: 0 0 18px;
  color: var(--ddw-muted);
  font-size: 14px;
  line-height: 1.8;
}

/* 详情链接：默认 / 悬停 / 键盘聚焦三态 */
.ddw-conf-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ddw-primary);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.ddw-conf-link i {
  transition: transform .2s;
}

.ddw-conf-link:hover {
  color: var(--ddw-primary-dark);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.ddw-conf-link:hover i {
  transform: translateX(3px);
}

.ddw-conf-link:focus-visible {
  outline: 2px solid var(--ddw-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

/* 动效克制：偏好减少动效时关闭位移与过渡 */
@media (prefers-reduced-motion: reduce) {
  .ddw-conf-item,
  .ddw-conf-link,
  .ddw-conf-link i {
    transition: none;
  }

  .ddw-conf-item:hover {
    transform: none;
  }
}

/* 平板：保持两列交错，缩小间距与字号 */
@media (max-width: 991px) {
  .ddw-conf-body {
    padding: 24px 26px;
  }

  .ddw-conf-name {
    font-size: 18px;
  }

  .ddw-conf-desc {
    font-size: 13px;
  }

  .ddw-conf-meta {
    gap: 6px 20px;
  }
}

/* 手机：单列，图上文下；主图全宽 + 辅图横排 */
@media (max-width: 768px) {
  .ddw-conf-item {
    grid-template-columns: 1fr;
  }

  .ddw-conf-item:nth-child(even) .ddw-conf-media,
  .ddw-conf-item:nth-child(even) .ddw-conf-body {
    order: initial;
  }

  .ddw-conf-media {
    min-height: 0;
  }

  .ddw-conf-gallery {
    position: static;
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .ddw-conf-main {
    aspect-ratio: 16 / 10;
  }

  .ddw-conf-side {
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
    grid-auto-rows: auto;
  }

  .ddw-conf-side img {
    height: auto;
    aspect-ratio: 4 / 3;
  }

  .ddw-conf-body {
    padding: 20px 22px;
  }
}

/* ---------- 科学家页首屏：白底大图（参照 hyd.hu） ---------- */
.ddw-scientist-hero {
  background: #fff;
  position: relative;
  overflow: hidden;
}

/* 底部金色渐隐细线，呼应品牌点缀色 */
.ddw-scientist-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ddw-gold) 0%, rgba(201, 162, 39, 0) 65%);
}

.sci-hero-photo-col {
  padding: 0;
}

.sci-hero-photo {
  width: 100%;
  /* 桌面端撑满首屏：扣除顶部条与导航约 126px */
  height: calc(100vh - 126px);
  min-height: 520px;
  max-height: 880px;
  object-fit: cover;
  object-position: 10% 50%;
  animation: sciHeroPhoto 1s ease-out both;
}

.sci-hero-text-col {
  padding: 70px 0 70px 48px;
}

.sci-hero-eyebrow {
  color: var(--ddw-gold);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 16px;
  animation: sciHeroText .7s ease-out both;
}

.ddw-scientist-hero h1 {
  font-size: 44px;
  font-weight: 700;
  color: var(--ddw-primary-dark);
  line-height: 1.35;
  animation: sciHeroText .7s ease-out .12s both;
}

.sci-hero-en {
  font-size: 30px;
  font-weight: 600;
  color: var(--ddw-primary);
  white-space: nowrap;
}

.sci-hero-lead {
  color: var(--ddw-primary);
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.8;
  margin-top: 18px;
  animation: sciHeroText .7s ease-out .22s both;
}

.sci-hero-bio p {
  color: var(--ddw-muted);
  font-size: 15.5px;
  line-height: 1.95;
  margin-top: 14px;
  animation: sciHeroText .7s ease-out .28s both;
}

.sci-hero-bio p+p {
  margin-top: 10px;
}

.sci-hero-btn {
  background: var(--ddw-gold);
  color: #0b2540;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 4px;
  border: none;
  margin-top: 28px;
  text-decoration: none;
  display: inline-block;
  transition: transform .2s, box-shadow .2s;
  animation: sciHeroText .7s ease-out .32s both;
}

.sci-hero-btn:hover {
  color: #0b2540;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, .18);
}

.sci-hero-breadcrumb {
  margin-top: 44px;
  margin-bottom: 0;
  font-size: 14px;
  animation: sciHeroText .7s ease-out .42s both;
}

.sci-hero-breadcrumb a {
  color: var(--ddw-primary);
  text-decoration: none;
}

.sci-hero-breadcrumb .breadcrumb-item {
  color: var(--ddw-muted);
}

.sci-hero-breadcrumb .breadcrumb-item.active {
  color: var(--ddw-muted);
}

.sci-hero-breadcrumb .breadcrumb-item+.breadcrumb-item::before {
  color: #b8c4d0;
}

@keyframes sciHeroPhoto {
  from {
    opacity: 0;
    transform: scale(1.03);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes sciHeroText {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 平板：上下排列，照片在上 */
@media (max-width: 991px) {
  .sci-hero-photo {
    height: 46vh;
    min-height: 340px;
    object-position: 15% 22%;
  }

  .sci-hero-text-col {
    padding: 40px 0 56px;
    text-align: center;
  }

  .ddw-scientist-hero h1 {
    font-size: 36px;
  }

  .sci-hero-en {
    font-size: 26px;
  }

  .sci-hero-breadcrumb {
    margin-top: 30px;
  }

  .sci-hero-breadcrumb ol {
    justify-content: center;
  }
}

/* 手机：继续压缩高度与字号 */
@media (max-width: 768px) {
  .sci-hero-photo {
    height: 38vh;
    min-height: 280px;
  }

  .ddw-scientist-hero h1 {
    font-size: 30px;
  }

  .sci-hero-en {
    font-size: 22px;
  }

  .sci-hero-lead {
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {

  .sci-hero-photo,
  .sci-hero-eyebrow,
  .ddw-scientist-hero h1,
  .sci-hero-lead,
  .sci-hero-bio p,
  .sci-hero-btn,
  .sci-hero-breadcrumb {
    animation: none;
  }
}