/* === Variables === */
:root {
  --color-text: #2d2d2d;
  --color-heading: #1a1a1a;
  --color-link: #483D8B;
  --color-link-hover: #2c2466;
  --color-bg: #ffffff;
  --color-bg-subtle: #f8f9fa;
  --color-border: #e5e7eb;
  --max-width: 720px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-heading: Georgia, "Times New Roman", serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;
}

/* === Reset === */
*, *::before, *::after {
  box-sizing: border-box;
}

/* === Base === */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-heading);
  line-height: 1.3;
}

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

a:hover {
  color: var(--color-link-hover);
}

img {
  max-width: 100%;
  height: auto;
}

/* === Layout === */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* === Navigation === */
.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.site-nav .site-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-heading);
  text-decoration: none;
}

.site-nav .site-title:hover {
  color: var(--color-link);
}

.nav-links a {
  margin-left: 1.5rem;
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.95rem;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-link);
}

/* === Profile === */
.profile {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.profile-photo {
  width: 180px;
  height: auto;
  border-radius: 4px;
  flex-shrink: 0;
}

.profile-info h1 {
  font-size: 1.8rem;
  margin: 0 0 0.2rem;
}

.profile-info .name-cn {
  height: 40px;
  margin-bottom: 0.5rem;
}

.profile-info .title-line {
  font-weight: 600;
  margin: 0.3rem 0;
}

.profile-info .affiliation {
  color: #555;
  margin: 0.2rem 0;
}

.profile-info .contact {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: #555;
}

.profile-info .contact a {
  margin-left: 0.3rem;
}

.bio {
  margin: 1rem 0 2rem;
  line-height: 1.8;
}

/* === Sections === */
.section {
  margin-top: 2.5rem;
}

.section h2 {
  font-size: 1.3rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.4rem;
  margin-bottom: 1rem;
}

/* === News === */
.news-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.news-list li {
  margin-bottom: 0.8rem;
  padding-left: 0;
  font-size: 0.92rem;
  line-height: 1.6;
}

.news-list .news-date {
  font-weight: 600;
  color: #444;
  display: inline-block;
  min-width: 120px;
}

/* === Experience & Education === */
.entry {
  margin-bottom: 1.2rem;
}

.entry h3 {
  font-size: 1rem;
  font-family: var(--font-body);
  font-weight: 600;
  margin: 0 0 0.2rem;
}

.entry .meta {
  font-size: 0.88rem;
  color: #666;
  margin: 0 0 0.2rem;
}

.entry p {
  margin: 0.2rem 0 0;
  font-size: 0.92rem;
}

/* === Publications === */
.pub-entry {
  margin-bottom: 1rem;
  padding: 0.8rem 1rem;
  background: var(--color-bg-subtle);
  border-radius: 4px;
  border-left: 3px solid var(--color-border);
}

.pub-title {
  font-weight: 600;
  margin: 0 0 0.3rem;
  font-size: 0.95rem;
  line-height: 1.4;
}

.pub-authors {
  font-size: 0.85rem;
  color: #555;
  margin: 0 0 0.3rem;
  line-height: 1.5;
}

.pub-venue {
  font-size: 0.83rem;
  color: #666;
  margin: 0;
}

.pub-venue a {
  font-size: 0.83rem;
}

.pub-note {
  font-size: 0.8rem;
  color: #888;
  font-style: italic;
}

/* === Honors === */
.honors-list {
  list-style: none;
  padding: 0;
}

.honors-list li {
  margin-bottom: 0.5rem;
  font-size: 0.92rem;
  padding-left: 0;
}

.honors-list .honor-year {
  display: inline-block;
  min-width: 80px;
  font-weight: 600;
  color: #444;
}

/* === Blog List === */
.blog-list h1 {
  font-size: 1.8rem;
  margin-bottom: 0.3rem;
}

.blog-subtitle {
  color: #666;
  margin-top: 0;
  margin-bottom: 2rem;
}

.blog-entry {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.blog-entry:last-child {
  border-bottom: none;
}

.blog-entry h2 {
  font-size: 1.3rem;
  margin: 0 0 0.3rem;
  border: none;
  padding: 0;
}

.blog-entry h2 a {
  color: var(--color-heading);
}

.blog-entry h2 a:hover {
  color: var(--color-link);
}

.blog-entry time {
  font-size: 0.85rem;
  color: #888;
}

.blog-entry .excerpt {
  margin-top: 0.5rem;
  font-size: 0.92rem;
  color: #555;
  line-height: 1.6;
}

/* === Post === */
.post-header {
  margin-bottom: 2rem;
}

.post-title {
  font-size: 2rem;
  line-height: 1.3;
  margin: 0 0 0.5rem;
}

.post-date {
  font-size: 0.9rem;
  color: #888;
  display: block;
}

.post-content {
  line-height: 1.8;
}

.post-content h2 {
  margin-top: 2.5rem;
  margin-bottom: 0.8rem;
  font-size: 1.4rem;
  border-bottom: none;
  padding-bottom: 0;
}

.post-content h3 {
  margin-top: 1.8rem;
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
}

.post-content p {
  margin-bottom: 1.2rem;
}

.post-content blockquote {
  border-left: 3px solid var(--color-link);
  padding-left: 1rem;
  margin: 1.5rem 0;
  margin-left: 0;
  color: #555;
  font-style: italic;
}

.post-content ul, .post-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.2rem;
}

.post-content li {
  margin-bottom: 0.4rem;
}

.post-content code {
  font-family: var(--font-mono);
  background: var(--color-bg-subtle);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  font-size: 0.88em;
}

.post-content pre {
  background: var(--color-bg-subtle);
  padding: 1rem 1.2rem;
  border-radius: 4px;
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.5;
}

.post-content pre code {
  background: none;
  padding: 0;
}

.post-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2.5rem 0;
}

.post-content strong {
  color: var(--color-heading);
}

/* === Footer === */
.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.85rem;
  color: #888;
}

/* === Responsive === */
@media (max-width: 600px) {
  .profile {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .profile-photo {
    width: 140px;
  }

  .site-nav {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  .nav-links a {
    margin-left: 0;
    margin-right: 1rem;
  }

  .container {
    padding: 1.5rem 1rem;
  }

  .post-title {
    font-size: 1.5rem;
  }

  .news-list .news-date {
    display: block;
    min-width: auto;
  }
}