/* Links */
a {
  text-decoration: underline;
  text-decoration-style: solid;
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
  border-bottom: none;
}

a:hover {
  color: #9c3d2e;
}

/* 头像左侧 + 姓名与导航右侧堆叠 */
.masthead {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 24px;
  align-items: start;
  text-align: left;
  width: 100%;
  padding: 30px 0;
  margin-left: 0;
  margin-bottom: 30px;
  border-bottom: 1px solid black;
}
.masthead h1 {
  grid-column: 1;
  grid-row: 1 / 3;
  margin: 0;
}
.masthead .tagline {
  grid-column: 2;
  grid-row: 1;
  align-self: end;
  text-align: left;
  font-size: 34px;
  font-style: italic;
  margin: 0;
}
.masthead .menu {
  grid-column: 2;
  grid-row: 2;
  direction: ltr;
  margin-top: 12px;
}
.masthead .menu ul {
  display: flex;
  justify-content: flex-start;
  gap: 30px;
  list-style: none;
  padding: 0;
  margin: 0;
}

/* 拓宽正文区，去掉竖线分隔 */
body {
  width: 100%;
  max-width: 820px;
}

body {
  font-family: "Crimson Pro", Palatino, "Palatino Linotype", "Book Antiqua", Optima, 'source-han-serif-sc', 'Source Han Serif SC', 'Source Han Serif CN', 'Noto Serif CJK SC', 'Microsoft YaHei', sans-serif;
}

body {
  font-size: 18px;
}

.main {
  width: 100%;
  margin-left: 0;
  padding: 40px 10px;
  border-left: none;
  min-height: auto;
}

/* 标题与上方分隔线间距 */
.main .title h1 {
  margin-top: 50px;
}

/* Conference Presentations 列表间距与层级 */
.main li {
  margin-bottom: 14px;
}

.main li ul {
  margin-top: 4px;
  margin-bottom: 0;
}

.main li ul li {
  margin-bottom: 2px;
  font-size: 0.95em;
  color: #333;
}

details summary {
  cursor: pointer;
  list-style: none;
  margin-bottom: 8px;
}

details summary::-webkit-details-marker {
  display: none;
}

details summary::before {
  content: "▸ ";
}

details[open] summary::before {
  content: "▾ ";
}

details ul, details {
  margin-top: 4px;
}