/* Personal academic homepage — Tai-You Chen
   Style inspired by classic academic homepages (clean, text-first, 800px). */
body {
  font-family: Georgia, "Times New Roman", "PingFang SC", "Microsoft YaHei", serif;
  background: #ffffff;
  color: #222;
  margin: 0;
  padding: 0;
  line-height: 1.5;
}
.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 24px 24px 60px;
}
a { color: #0b5e8a; text-decoration: none; }
a:hover { text-decoration: underline; }

/* 页首 */
header { border-bottom: 1px solid #e5e5e5; padding-bottom: 18px; margin-bottom: 22px; }
nav a { margin-right: 18px; font-size: 15px; }
.name {
  font-size: 34px;
  font-weight: bold;
  color: #111;
  margin: 6px 0 4px;
}
.name .cn { font-size: 20px; color: #666; font-weight: normal; }
.affil { color: #555; font-size: 15px; margin: 6px 0 8px; }
.links { font-size: 14px; color: #0b5e8a; }
.links a { margin-right: 14px; }

/* 区块 */
section { margin-bottom: 34px; }
h2 {
  font-size: 20px;
  color: #0b5e8a;
  border-bottom: 1px solid #e5e5e5;
  padding-bottom: 6px;
  margin: 26px 0 14px;
}
p { font-size: 15.5px; color: #333; margin: 8px 0; }

/* 研究思路树 */
.thread { text-align: center; }
.root-box {
  display: inline-block;
  background: #0b5e8a;
  color: #fff;
  font-size: 16px;
  font-weight: bold;
  padding: 14px 22px;
  border-radius: 6px;
  max-width: 620px;
  line-height: 1.45;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.thread-vline { width: 2px; height: 22px; background: #0b5e8a; margin: 0 auto; }
.thread-hline { width: 80%; max-width: 640px; height: 2px; background: #0b5e8a; margin: 0 auto; }
.branches {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 14px;
}
.branch {
  flex: 1 1 240px;
  max-width: 300px;
  border: 1px solid #d8e3ea;
  border-top: 4px solid #0b5e8a;
  border-radius: 6px;
  background: #fbfdfe;
  padding: 12px 14px;
  text-align: left;
}
.branch h3 { font-size: 15px; color: #0b5e8a; margin: 0 0 6px; }
.branch p { font-size: 13px; color: #444; margin: 4px 0; line-height: 1.5; }
.branch .tag { display: inline-block; font-size: 11px; background: #eaf2f7; color: #0b5e8a; border-radius: 10px; padding: 1px 8px; margin-right: 4px; }
.branch .ongoing { border-top-color: #c9a227; }
.branch .ongoing h3 { color: #8a6d1a; }

/* 论文列表 */
.pubgroup { margin-bottom: 16px; }
.pubgroup h3 { font-size: 16px; color: #333; margin: 10px 0 6px; }
.pub { margin: 0 0 10px 0; padding-left: 0; }
.pub .t { font-size: 15px; font-weight: bold; color: #111; }
.pub .a { font-size: 13.5px; color: #555; }
.pub .v { font-size: 13px; color: #0b5e8a; }
.pub .me { font-weight: bold; }
.pub .tag { display: inline-block; font-size: 11px; background: #fdf0e3; color: #b35c1e; border-radius: 10px; padding: 1px 8px; margin-left: 6px; }
.badge { display: inline-block; font-size: 11px; background: #eaf2f7; color: #0b5e8a; border-radius: 10px; padding: 1px 8px; margin-left: 6px; }

footer { margin-top: 40px; padding-top: 14px; border-top: 1px solid #e5e5e5; font-size: 13px; color: #888; }