/* ==========================================================================
   个人网站模板样式表
   配色方案参考: al-folio Jekyll 主题 (minxuepan.github.io)
   布局结构参考: airebao.com (导航栏 → Hero → 卡片流 + 侧边栏 → 页脚)
   ========================================================================== */

/* CSS 变量 — 亮色主题 (al-folio 默认) */
:root {
  --purple-color: #b509ac;
  --red-color: #ff3636;
  --red-color-dark: #b71c1c;
  --orange-color: #f29105;
  --blue-color: #0076df;
  --cyan-color: #2698ba;
  --green-color: #00ab37;
  --pink-color: #f92080;
  --yellow-color: #efcc00;

  --global-bg-color: #ffffff;
  --global-code-bg-color: rgba(181, 9, 172, 0.05);
  --global-text-color: #000000;
  --global-text-color-light: #828282;
  --global-theme-color: var(--purple-color);
  --global-hover-color: var(--purple-color);
  --global-hover-text-color: #ffffff;
  --global-footer-bg-color: #1c1c1d;
  --global-footer-text-color: #b0b0b0;
  --global-footer-link-color: #ffffff;
  --global-divider-color: rgba(0, 0, 0, 0.1);
  --global-card-bg-color: #ffffff;
  --global-card-border-color: rgba(0, 0, 0, 0.08);
  --global-highlight-color: var(--red-color-dark);
  --global-back-to-top-bg-color: rgba(0, 0, 0, 0.4);
  --global-back-to-top-text-color: #ffffff;
  --global-tag-bg: rgba(181, 9, 172, 0.08);
  --global-tag-text: var(--purple-color);
  --global-navbar-bg: rgba(255, 255, 255, 0.85);
  --global-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --global-shadow-hover: 0 6px 24px rgba(181, 9, 172, 0.12);
}

/* 暗色主题 */
html[data-theme="dark"] {
  --global-bg-color: #1c1c1d;
  --global-code-bg-color: #2c3237;
  --global-text-color: #e0e0e0;
  --global-text-color-light: #828282;
  --global-theme-color: var(--cyan-color);
  --global-hover-color: var(--cyan-color);
  --global-hover-text-color: #000000;
  --global-footer-bg-color: #121214;
  --global-footer-text-color: #828282;
  --global-footer-link-color: #e0e0e0;
  --global-divider-color: #424246;
  --global-card-bg-color: #212529;
  --global-card-border-color: rgba(255, 255, 255, 0.08);
  --global-highlight-color: var(--red-color);
  --global-back-to-top-bg-color: rgba(255, 255, 255, 0.5);
  --global-back-to-top-text-color: #000000;
  --global-tag-bg: rgba(38, 152, 186, 0.15);
  --global-tag-text: var(--cyan-color);
  --global-navbar-bg: rgba(28, 28, 29, 0.85);
  --global-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
  --global-shadow-hover: 0 6px 24px rgba(38, 152, 186, 0.2);
}

/* 基础重置 */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--global-bg-color);
  color: var(--global-text-color);
  line-height: 1.7;
  transition: background-color 0.3s ease, color 0.3s ease;
  min-height: 100vh;
}

a {
  color: var(--global-theme-color);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover { color: var(--global-hover-color); text-decoration: underline; }

img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

code, pre {
  font-family: "SF Mono", "Fira Code", Consolas, "Courier New", monospace;
  background: var(--global-code-bg-color);
  border-radius: 4px;
}
code { padding: 0.15em 0.4em; font-size: 0.9em; }
pre { padding: 1em; overflow-x: auto; }
pre code { padding: 0; background: none; }

blockquote {
  border-left: 4px solid var(--global-theme-color);
  padding-left: 1rem;
  margin: 1rem 0;
  color: var(--global-text-color-light);
}

/* 通用容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

.section-title {
  font-size: 1.4rem; font-weight: 700; margin-bottom: 1rem;
  display: flex; align-items: center; gap: 0.5rem;
}
.section-title::before {
  content: ""; display: inline-block; width: 4px; height: 1.2em;
  background: var(--global-theme-color); border-radius: 2px;
}
/* ---- 顶部导航栏 ---- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: var(--global-navbar-bg);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--global-divider-color);
  transition: background 0.3s ease, border-color 0.3s ease;
}
.navbar-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 20px;
  height: 60px; display: flex; align-items: center;
  justify-content: space-between; gap: 1rem;
}
.navbar-logo {
  font-size: 1.25rem; font-weight: 700; color: var(--global-text-color);
  white-space: nowrap; display: flex; align-items: center; gap: 0.4rem;
}
.navbar-logo:hover { text-decoration: none; color: var(--global-theme-color); }
.navbar-logo .logo-dot { color: var(--global-theme-color); }

.navbar-menu { display: flex; align-items: center; gap: 0.25rem; }
.navbar-menu a {
  color: var(--global-text-color); padding: 0.4rem 0.85rem;
  border-radius: 6px; font-size: 0.95rem; font-weight: 500;
  transition: all 0.2s ease;
}
.navbar-menu a:hover, .navbar-menu a.active {
  background: var(--global-tag-bg); color: var(--global-theme-color);
  text-decoration: none;
}
.navbar-actions { display: flex; align-items: center; gap: 0.5rem; }

.theme-toggle {
  background: none; border: 1px solid var(--global-divider-color);
  border-radius: 8px; width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--global-text-color); font-size: 1.1rem;
  transition: all 0.2s ease; flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: var(--global-theme-color); color: var(--global-theme-color);
}
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.navbar-toggle {
  display: none; background: none; border: none; font-size: 1.5rem;
  color: var(--global-text-color); cursor: pointer;
  padding: 0.25rem 0.5rem; line-height: 1;
}

/* ---- Hero 区域 ---- */
.hero { padding: 100px 0 48px; position: relative; }
.hero-inner {
  display: flex; align-items: center; gap: 2.5rem; flex-wrap: wrap;
}
.hero-avatar {
  width: 128px; height: 128px; border-radius: 50%; flex-shrink: 0;
  border: 3px solid var(--global-theme-color); overflow: hidden;
  box-shadow: var(--global-shadow);
}
.hero-avatar img { width: 100%; height: 100%; object-fit: cover; }
.hero-info { flex: 1; min-width: 280px; }
.hero-name {
  font-size: 2.2rem; font-weight: 800; line-height: 1.2; margin-bottom: 0.25rem;
}
.hero-name .name-en {
  color: var(--global-text-color-light); font-weight: 400; font-size: 1.1rem;
}
.hero-title {
  font-size: 1.05rem; color: var(--global-text-color-light);
  margin-bottom: 0.5rem;
}
.hero-title strong { color: var(--global-theme-color); font-weight: 600; }
.hero-affiliation {
  font-size: 0.9rem; color: var(--global-text-color-light); margin-bottom: 1rem;
}
.hero-social {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
}
.hero-social a {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-size: 0.9rem; color: var(--global-text-color-light);
  transition: color 0.2s ease;
}
.hero-social a:hover { color: var(--global-theme-color); text-decoration: none; }
.hero-tagline {
  margin-top: 1.5rem; padding: 1rem 1.5rem;
  background: var(--global-code-bg-color);
  border-left: 4px solid var(--global-theme-color);
  border-radius: 0 8px 8px 0;
  font-size: 1.05rem; font-style: italic; line-height: 1.6;
}

/* ---- 主布局 — 双栏 (内容 + 侧边栏) ---- */
.layout {
  display: grid; grid-template-columns: 1fr 320px;
  gap: 2.5rem; padding-bottom: 4rem;
}
.main-content { min-width: 0; }
.sidebar { display: flex; flex-direction: column; gap: 1.5rem; }

/* ---- 分类标签栏 ---- */
.filter-tabs {
  display: flex; align-items: center; gap: 0.5rem;
  padding-bottom: 1rem; border-bottom: 1px solid var(--global-divider-color);
  margin-bottom: 1.5rem; overflow-x: auto; -webkit-overflow-scrolling: touch;
}
.filter-tabs::-webkit-scrollbar { height: 0; }
.filter-tab {
  padding: 0.35rem 0.9rem; border-radius: 20px; font-size: 0.88rem;
  font-weight: 500; color: var(--global-text-color-light);
  background: none; border: 1px solid transparent; cursor: pointer;
  white-space: nowrap; transition: all 0.2s ease;
}
.filter-tab:hover { color: var(--global-theme-color); }
.filter-tab.active {
  background: var(--global-tag-bg); color: var(--global-tag-text);
  border-color: var(--global-theme-color);
}

/* ---- 文章卡片 ---- */
.article-list { display: flex; flex-direction: column; gap: 1.25rem; }
.article-card {
  background: var(--global-card-bg-color);
  border: 1px solid var(--global-card-border-color);
  border-radius: 12px; padding: 1.5rem;
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
  display: flex; flex-direction: column; gap: 0.6rem;
}
.article-card:hover {
  box-shadow: var(--global-shadow-hover); transform: translateY(-2px);
  border-color: var(--global-theme-color);
}
.article-card-meta {
  display: flex; align-items: center; gap: 0.75rem;
  font-size: 0.82rem; color: var(--global-text-color-light);
}
.article-card-tag {
  display: inline-block; padding: 0.1rem 0.6rem; border-radius: 4px;
  font-size: 0.75rem; font-weight: 600;
  background: var(--global-tag-bg); color: var(--global-tag-text);
}
.article-card-title {
  font-size: 1.2rem; font-weight: 700; line-height: 1.4;
  color: var(--global-text-color);
}
.article-card-title a { color: inherit; }
.article-card-title a:hover { color: var(--global-theme-color); text-decoration: none; }
.article-card-summary {
  font-size: 0.93rem; color: var(--global-text-color-light); line-height: 1.65;
}
.article-card-footer {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 0.25rem;
}
.article-card-tags { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.article-card-hashtag { font-size: 0.8rem; color: var(--global-text-color-light); }
.article-card-hashtag::before { content: "#"; }
.article-card-read {
  font-size: 0.85rem; font-weight: 500;
  color: var(--global-theme-color); white-space: nowrap;
}

/* ---- 侧边栏卡片 ---- */
.sidebar-card {
  background: var(--global-card-bg-color);
  border: 1px solid var(--global-card-border-color);
  border-radius: 12px; padding: 1.25rem;
  box-shadow: var(--global-shadow);
}
.sidebar-card-title {
  font-size: 1rem; font-weight: 700; margin-bottom: 0.85rem;
  display: flex; align-items: center; gap: 0.4rem;
}
.sidebar-card-title .icon { color: var(--global-theme-color); }

.news-list { display: flex; flex-direction: column; gap: 0.65rem; }
.news-item {
  padding-left: 1rem; position: relative;
  font-size: 0.88rem; line-height: 1.5; color: var(--global-text-color);
}
.news-item::before {
  content: ""; position: absolute; left: 0; top: 0.55em;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--global-theme-color);
}
.news-item .news-date {
  display: block; font-size: 0.78rem;
  color: var(--global-text-color-light); margin-bottom: 0.15rem;
}

.pick-list { display: flex; flex-direction: column; gap: 0.75rem; }
.pick-item { display: flex; gap: 0.65rem; align-items: flex-start; }
.pick-item .pick-num {
  font-size: 1.2rem; font-weight: 800; color: var(--global-theme-color);
  line-height: 1; flex-shrink: 0; width: 1.5rem;
}
.pick-item .pick-text a {
  color: var(--global-text-color); font-size: 0.88rem;
  font-weight: 500; line-height: 1.45;
}
.pick-item .pick-text a:hover { color: var(--global-theme-color); text-decoration: none; }
.pick-item .pick-meta {
  font-size: 0.78rem; color: var(--global-text-color-light); margin-top: 0.15rem;
}

.skill-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.skill-tag {
  padding: 0.2rem 0.7rem; border-radius: 16px; font-size: 0.8rem;
  background: var(--global-tag-bg); color: var(--global-tag-text);
  border: 1px solid transparent; transition: all 0.2s ease; cursor: default;
}
.skill-tag:hover { border-color: var(--global-theme-color); }

.subscribe-card { text-align: center; }
.subscribe-card p {
  font-size: 0.85rem; color: var(--global-text-color-light);
  margin-bottom: 0.85rem;
}
.subscribe-btn {
  display: inline-block; padding: 0.5rem 1.5rem;
  background: var(--global-theme-color); color: var(--global-hover-text-color);
  border-radius: 8px; font-size: 0.9rem; font-weight: 600;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.subscribe-btn:hover {
  text-decoration: none; opacity: 0.9; transform: translateY(-1px);
  color: var(--global-hover-text-color);
}

/* ---- 页脚 ---- */
.footer {
  background: var(--global-footer-bg-color);
  color: var(--global-footer-text-color);
  padding: 2.5rem 0 2rem; margin-top: auto;
}
.footer-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 20px;
  display: flex; flex-direction: column; align-items: center;
  gap: 1rem; text-align: center;
}
.footer-links {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 1.5rem;
}
.footer-links a {
  color: var(--global-footer-link-color); font-size: 0.88rem;
  transition: color 0.2s ease;
}
.footer-links a:hover { color: var(--global-theme-color); text-decoration: none; }
.footer-copy { font-size: 0.82rem; color: var(--global-footer-text-color); }

/* ---- 回到顶部 ---- */
#back-to-top {
  position: fixed; bottom: 30px; right: 30px;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--global-back-to-top-bg-color);
  color: var(--global-back-to-top-text-color);
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; opacity: 0; pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease; z-index: 999;
}
#back-to-top.visible { opacity: 1; pointer-events: auto; }
#back-to-top:hover { transform: translateY(-4px); }

/* ---- 页面通用 ---- */
.page-header { padding: 100px 0 2rem; }
.page-title { font-size: 2rem; font-weight: 800; margin-bottom: 0.5rem; }
.page-subtitle { font-size: 1rem; color: var(--global-text-color-light); }

/* ---- 项目网格 ---- */
.project-grid {
  /* min(100%, 320px)：极窄屏（<352px）下卡片也不会撑破容器，避免横向滚动 */
  display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--global-card-bg-color);
  border: 1px solid var(--global-card-border-color);
  border-radius: 12px; overflow: hidden;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
  display: flex; flex-direction: column;
}
.project-card:hover { box-shadow: var(--global-shadow-hover); transform: translateY(-4px); }
.project-card-img {
  width: 100%; aspect-ratio: 16 / 9; overflow: hidden;
  background: var(--global-code-bg-color);
}
.project-card-img img { width: 100%; height: 100%; object-fit: cover; }
.project-card-body {
  padding: 1.25rem; flex: 1;
  display: flex; flex-direction: column; gap: 0.5rem;
}
.project-card-title { font-size: 1.15rem; font-weight: 700; }
.project-card-desc { font-size: 0.9rem; color: var(--global-text-color-light); flex: 1; }
.project-card-links { display: flex; gap: 1rem; font-size: 0.85rem; }

/* ---- 时间线 ---- */
.timeline { position: relative; padding-left: 1.5rem; }
.timeline::before {
  content: ""; position: absolute; left: 5px; top: 0.5rem; bottom: 0.5rem;
  width: 2px; background: var(--global-divider-color);
}
.timeline-item { position: relative; padding-bottom: 1.5rem; }
.timeline-item::before {
  content: ""; position: absolute; left: -1.5rem; top: 0.35rem;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--global-theme-color); border: 2px solid var(--global-bg-color);
}
.timeline-item .timeline-date {
  font-size: 0.82rem; font-weight: 600;
  color: var(--global-theme-color); margin-bottom: 0.15rem;
}
.timeline-item .timeline-title { font-size: 1rem; font-weight: 600; }
.timeline-item .timeline-desc { font-size: 0.88rem; color: var(--global-text-color-light); }

/* ---- 联系页 ---- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.contact-list { display: flex; flex-direction: column; gap: 1rem; }
.contact-item {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 1rem; background: var(--global-card-bg-color);
  border: 1px solid var(--global-card-border-color);
  border-radius: 10px; transition: border-color 0.2s ease;
}
.contact-item:hover { border-color: var(--global-theme-color); }
.contact-item .contact-icon {
  width: 40px; height: 40px; border-radius: 8px;
  background: var(--global-tag-bg);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--global-theme-color); flex-shrink: 0;
}
.contact-item .contact-label { font-size: 0.78rem; color: var(--global-text-color-light); }
.contact-item .contact-value { font-size: 0.92rem; font-weight: 500; }

.contact-form { display: flex; flex-direction: column; gap: 1rem; }
.form-group label { display: block; font-size: 0.88rem; font-weight: 500; margin-bottom: 0.35rem; }
.form-group input, .form-group textarea {
  width: 100%; padding: 0.65rem 0.85rem;
  border: 1px solid var(--global-divider-color); border-radius: 8px;
  background: var(--global-bg-color); color: var(--global-text-color);
  font-size: 0.92rem; font-family: inherit; transition: border-color 0.2s ease;
}
.form-group input:focus, .form-group textarea:focus {
  outline: none; border-color: var(--global-theme-color);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit {
  padding: 0.65rem 1.5rem; background: var(--global-theme-color);
  color: var(--global-hover-text-color); border: none; border-radius: 8px;
  font-size: 0.95rem; font-weight: 600; cursor: pointer;
  align-self: flex-start; transition: opacity 0.2s ease, transform 0.2s ease;
}
.form-submit:hover { opacity: 0.9; transform: translateY(-1px); }

/* ---- 文章正文 ---- */
.article-content { max-width: 760px; margin: 0 auto; padding-bottom: 3rem; }
.article-content h2 { font-size: 1.5rem; font-weight: 700; margin: 2rem 0 1rem; }
.article-content h3 { font-size: 1.2rem; font-weight: 600; margin: 1.5rem 0 0.75rem; }
.article-content p { margin-bottom: 1rem; line-height: 1.8; }
.article-content ul, .article-content ol { margin-bottom: 1rem; padding-left: 1.5rem; }
.article-content li { margin-bottom: 0.35rem; list-style: disc; }
.article-content ol li { list-style: decimal; }

/* ---- 响应式 ---- */
@media (max-width: 968px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { order: 2; }
}
@media (max-width: 768px) {
  .navbar-menu {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    flex-direction: column; background: var(--global-bg-color);
    border-bottom: 1px solid var(--global-divider-color);
    padding: 0.5rem 0; gap: 0;
  }
  .navbar-menu.open { display: flex; }
  .navbar-menu a { padding: 0.75rem 1.25rem; border-radius: 0; width: 100%; }
  .navbar-toggle { display: block; }
  .hero { padding: 80px 0 2rem; }
  .hero-inner { flex-direction: column; text-align: center; align-items: center; }
  .hero-social { justify-content: center; }
  .hero-tagline { text-align: left; }
  .hero-name { font-size: 1.8rem; }
  .contact-grid { grid-template-columns: 1fr; }
  .page-header { padding: 80px 0 1.5rem; }
  .page-title { font-size: 1.6rem; }
  #back-to-top { bottom: 20px; right: 20px; width: 40px; height: 40px; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .article-card { padding: 1.1rem; }
  .hero-avatar { width: 100px; height: 100px; }
}