:root {
  --bg: #ececec;
  --paper: #f7f7f7;
  --text: #2f2f32;
  --muted: #a9acb0;
  --accent: #3d7997;
  --line: #d2d2d2;
}

html {
  font-size: 75%;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Libre Franklin", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: linear-gradient(160deg, #f3f3f3 0%, #e9e9e9 100%);
  color: var(--text);
}

.wrapper {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  background: var(--paper);
  border-bottom: 1px solid #e4e4e4;
}

.site-title {
  text-align: center;
  margin: 0;
  padding: 42px 0 22px;
  font-size: clamp(1.9rem, 2.9vw, 3.1rem);
  letter-spacing: 0.08em;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 44px;
  padding-bottom: 20px;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
}

.site-nav a.active,
.site-nav a:hover {
  color: #2f2f32;
}

.page-bg {
  background: var(--bg);
  min-height: calc(100vh - 240px);
}

.intro-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 48px;
  padding: 52px 0 64px;
}

.profile-wrap {
  margin: 0;
  display: flex;
  justify-content: center;
}

.profile-photo {
  width: 310px;
  height: 445px;
  object-fit: cover;
  background: radial-gradient(circle at 50% 20%, #35548f 0%, #18224a 60%, #0e142d 100%);
  border: 1px solid #c8c8c8;
}

.intro-content h2 {
  margin-top: 6px;
  font-size: 1.65rem;
}

.intro-content {
  padding-left: 2rem;
}

.intro-content h3 {
  margin-top: 34px;
  font-size: 1.45rem;
}

.intro-content p,
.intro-content li,
.content-page p,
.content-page li {
  font-size: 1.32rem;
  line-height: 1.65;
}

ol {
  padding-left: 1.3em;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.link-row {
  margin-top: 30px;
}

.content-page {
  padding: 42px 0 68px;
  width: min(1060px, 92%);
}

.content-page h2 {
  margin-top: 4px;
  font-size: 1.65rem;
}

.content-page h3 {
  font-size: 1.35rem;
  margin-top: 28px;
}

.paper-list {
  margin-top: 14px;
  padding-left: 1.35em;
}

.paper-list li {
  margin-bottom: 18px;
}

.teaching-page {
  width: min(860px, 76%);
  margin-left: auto;
  margin-right: auto;
  padding-left: 0;
  padding-right: 0;
}

.teaching-page h2,
.teaching-page h3,
.teaching-page p,
.teaching-page .teaching-list,
.teaching-page hr {
  width: min(760px, 100%);
  margin-left: auto;
  margin-right: auto;
}

.paper-list .abstract {
  text-align: justify;
  text-justify: inter-word;
}

.teaching-page h2 {
  font-size: 1.45rem;
}

.teaching-page h3 {
  font-size: 1.2rem;
  margin-top: 22px;
}

.teaching-list {
  list-style: none;
  margin: 8px 0 24px;
  padding: 0;
}

.teaching-list li {
  margin: 0 0 8px;
  line-height: 1.5;
  font-size: 1.08rem;
}

.teaching-page p {
  font-size: 1.08rem;
  line-height: 1.5;
}

@media (min-width: 1200px) {
  .teaching-list li {
    white-space: nowrap;
    font-size: 1.08rem;
  }
}

.abstract {
  display: block;
}

hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 36px 0;
}

@media (max-width: 1000px) {
  .site-title {
    letter-spacing: 0.05em;
  }

  .site-nav {
    gap: 20px;
    flex-wrap: wrap;
  }

  .intro-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 38px;
  }

  .profile-photo {
    width: min(100%, 360px);
    height: auto;
    aspect-ratio: 3 / 4;
  }

  .intro-content h2,
  .intro-content h3,
  .content-page h2 {
    font-size: 1.45rem;
  }

  .intro-content p,
  .intro-content li,
  .content-page p,
  .content-page li,
  .content-page h3 {
    font-size: 1.05rem;
  }

  .teaching-list li {
    white-space: normal;
    font-size: 0.98rem;
  }

  .teaching-page p,
  .teaching-page h3 {
    font-size: 0.98rem;
  }
}