/* ====== 主题与基础变量 ====== */
:root{
  --bg:#f6f8fb;
  --card-bg:#ffffff;
  --primary:#1f3a5f;
  --secondary:#3aa0ff;
  --text:#2b3a4a;
  --muted:#6b7b8c;
  --border:#e6ebf1;
  --shadow:0 6px 18px rgba(17, 24, 39, 0.08);
  --radius:14px;
  --radius-sm:10px;
  --space-1:6px;
  --space-2:10px;
  --space-3:16px;
  --space-4:24px;
  --space-5:36px;
}

/* 自动适配暗色模式（无需改HTML） */
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0f172a;
    --card-bg:#0b1220;
    --primary:#c2e0ff;
    --secondary:#7cc4ff;
    --text:#e6edf6;
    --muted:#9fb2c7;
    --border:#1d2840;
    --shadow:0 6px 18px rgba(0,0,0,0.45);
  }
}

/* ====== 页面基础 ====== */
html{ scroll-behavior:smooth; }
*{ box-sizing:border-box; }
body{
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI",
               "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji",
               "Segoe UI Emoji";
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  max-width:1200px;
  margin:0 auto;
  padding:var(--space-4);
}

/* ====== 粘性导航 ====== */
.navbar{
  position:sticky;
  top:12px;                 /* 让它离页面边缘有点呼吸感 */
  z-index:50;
  background:linear-gradient(180deg, var(--primary), #1b2d48);
  padding:12px 18px;
  margin-bottom:var(--space-4);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.navbar ul{
  list-style:none;
  display:flex;
  gap:28px;
  justify-content:center;
  align-items:center;
  margin:0;
  padding:0;
  flex-wrap:wrap;
}
.navbar a{
  color:#fff;
  text-decoration:none;
  font-weight:600;
  letter-spacing:.2px;
  opacity:.95;
  transition:opacity .2s ease, transform .2s ease, color .2s ease;
}
.navbar a:hover{
  opacity:1;
  color:var(--secondary);
  transform:translateY(-1px);
}

/* 点击锚点时避免标题被粘性导航遮住 */
section{ scroll-margin-top:84px; }

/* ====== 头像与头部 ====== */
.profile-header{
  display:grid;
  grid-template-columns: 220px 1fr;
  gap:var(--space-3);
  margin-bottom:var(--space-3);
  align-items:center;
}
.profile-photo{
  width:100%;
  border-radius:12px;
  box-shadow:var(--shadow);
}
.profile-info h1{
  font-size:2.2rem;
  line-height:1.2;
  margin:0 0 var(--space-1) 0;
  color:var(--primary);
}
.profile-info p{
  margin:0;
  color:var(--muted);
  font-weight:500;
}
.contact-links{
  display:flex;
  gap:18px;
  margin-top:var(--space-2);
}
.icon-link{
  font-size:1.6rem;
  color:var(--primary);
  transition:transform .2s ease, color .2s ease, opacity .2s ease;
  opacity:.9;
}
.icon-link:hover{
  color:var(--secondary);
  transform:translateY(-2px);
  opacity:1;
}

/* ====== 通用区块（卡片化） ====== */
section{
  margin-bottom:var(--space-3);
  padding:var(--space-4);
  background:var(--card-bg);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
h2{
  color:var(--primary);
  font-size:1.5rem;
  margin:0 0 var(--space-3) 0;
  padding-bottom:8px;
  border-bottom:2px solid rgba(58,160,255,.25);
}

/* 列表更紧凑一些 */
section li{
  margin:6px 0;
}

/* ====== Group 成员卡片 ====== */
.group-container{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap:20px;
}
.member-card{
  background:var(--card-bg);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:16px;
  box-shadow:var(--shadow);
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.member-card:hover{
  transform:translateY(-3px);
  box-shadow:0 10px 24px rgba(17,24,39,0.12);
  border-color:#cfe7ff;
}
.member-card h3{
  margin:0 0 6px;
  font-size:1.05rem;
  color:var(--primary);
}
.member-card p{
  margin:0 0 10px;
  color:var(--muted);
  font-style:normal;
  /* 把职称做成“胶囊” */
  display:inline-block;
  padding:3px 10px;
  border:1px solid var(--border);
  border-radius:999px;
  background:linear-gradient(180deg, rgba(58,160,255,.10), rgba(58,160,255,.06));
}
.member-card a{
  text-decoration:none;
  font-weight:600;
  color:var(--secondary);
  border-bottom:1px dashed rgba(58,160,255,.35);
  transition:color .2s ease, border-color .2s ease;
}
.member-card a:hover{
  color:#147ad6;
  border-color:#147ad6;
}

/* ====== Publications 链接优化 ====== */
#publications p a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border:1px solid var(--border);
  border-radius:10px;
  background:linear-gradient(180deg, rgba(58,160,255,.08), rgba(58,160,255,.04));
  box-shadow:var(--shadow);
}
#publications p a::before{
  content:"🔗";
  font-size:1.05rem;
}

/* ====== 响应式 ====== */
@media (max-width: 900px){
  .profile-header{ grid-template-columns:1fr; text-align:center; }
  .contact-links{ justify-content:center; }
}
@media (max-width: 480px){
  body{ padding:16px; }
  .navbar{ top:8px; }
  h2{ font-size:1.3rem; }
}

.logo-links{
  display:flex;
  gap:16px;
  margin:12px 0;
  flex-wrap:wrap;
}
.logo-links img{
  height:60px;
  width:auto;
  transition:transform .2s ease, opacity .2s ease;
  opacity:.95;
}
.logo-links img:hover{
  transform:scale(1.05);
  opacity:1;
}