/* ========== 全局基础 ========== */
body {
  margin: 0;
  font-family: sans-serif;
  background-color: #ffffff;
  color: #222;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1 {
  font-size: 2em;
  margin-bottom: 0.4em;
}

a {
  color: #0077cc;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #005999;
}

/* ========== Header ========== */
header {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 1em 2em;
  background-color: #fff;
  border-bottom: 1px solid #eee;
}

header a {
  margin-left: 1em;
  font-size: 1.2em;
}

/* ========== 介绍区 #intro ========== */
#intro {
  text-align: center;
  margin: 4em 1em 3em;
}

.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1em;
}

/* 动画文本区域 */
#typed-container {
  font-size: 1.1em;
  color: #555;
  min-height: 2.5em;        /* 保持高度，防止抖动 */
  line-height: 1.25em;
  white-space: normal;      /* 允许换行 */
  max-width: 350px;
  margin: 0 auto;
  transition: max-width 0.3s ease, font-size 0.3s ease;
}

@media (max-width: 400px) {
  #typed-container {
    font-size: 1em;
    max-width: 280px;
  }
}

.cursor {
  display: inline-block;
  margin-left: 4px;
  color: #555;
  animation: blink 1s steps(2, start) infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.section-title {
  text-align: center;
  font-size: 1.4em;
  margin-top: 1em;
}

.divider {
  margin: 3em auto;
  width: 60%;
  border: none;
  border-top: 1px solid #ccc;
}

.articles {
  max-width: 600px;
  margin: 2em auto;
  padding: 0 1em;
}

.article {
  margin-bottom: 2em;
}

.article h3 {
  margin-bottom: 0.3em;
}

.article h3 a {
  color: #0077cc;
}

.article h3 a:hover {
  color: #005999;
}

.article .summary {
  margin: 0.5em 0;
  color: #666;
}

.meta {
  font-size: 0.85em;
  color: #666;
  margin-top: 0.3em;
  display: flex;
  flex-wrap: wrap;
  gap: 1em;
  align-items: center;
}

.date {
  font-style: italic;
}

.tags {
  display: flex;
  gap: 0.5em;
  flex-wrap: wrap;
}

.tag {
  background-color: #eee;
  padding: 0.2em 0.6em;
  border-radius: 1em;
  font-size: 0.85em;
  color: #555;
  cursor: default;
  user-select: none;
}

.tag-filter {
  text-align: center;
  margin: 1em 0;
}

.filter-btn {
  margin: 0.3em;
  padding: 0.4em 1em;
  border: none;
  background: #eee;
  cursor: pointer;
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.filter-btn:hover {
  background-color: #ddd;
}

.more-link {
  max-width: 600px;
  margin: 1rem auto 0 auto;
  padding: 0 1rem;
  text-align: right;
}

.article-container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
  width: 90%;
  line-height: 1.6;
  font-size: 1.1rem;
  color: var(--text-color, #222);
  background-color: var(--bg-color, #fff);
  border-radius: 6px;
  box-shadow: 0 0 10px rgb(0 0 0 / 0.05);
}

@media (min-width: 900px) {
  .article-container {
    padding: 0 3rem;
  }
}

.social-icons {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
  gap: 1.2rem;
}

.social-icons svg {
  width: 30px;
  height: 30px;
}


.social-icons svg:hover {
  transform: scale(1.2);
  fill: #0073b1;
}

.footer {
  text-align: center;
  padding: 2em 0;
  font-size: 0.9em;
  color: #aaa;
}

@media (prefers-color-scheme: dark) {
  body {
    background-color: #121212;
    color: #eee;
  }

  a {
    color: #80bfff;
  }

  .divider {
    border-color: #444;
  }

  .article h3 a {
    color: #80bfff;
  }

  .article p, .article .summary {
    color: #ccc;
  }

  .meta {
    color: #aaa;
  }

  .tag {
    background-color: #333;
    color: #ccc;
  }

  .social-icons svg {
    fill: #ccc;
  }

  .social-icons svg:hover {
    fill: #1da1f2;
  }

  header {
    background-color: #1a1a1a;
    border-bottom-color: #333;
  }

  .article-container {
    background-color: #1e1e1e;
    color: #ddd;
    box-shadow: 0 0 15px rgb(255 255 255 / 0.05);
  }
}

.social-icons svg.github-icon {
  transform: scale(0.9);
}

.social-icons svg.youtube-icon {
  transform: scale(1);
}

.social-icons svg.gmail-icon {
  transform: scale(1.1);
}