:root {
  --bg: #fafaf8;
  --fg: #1a1a1a;
  --muted: #666;
  --accent: #1a5fb4;
  --card: #fff;
  --border: #e5e3dd;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141414;
    --fg: #e8e8e8;
    --muted: #999;
    --accent: #62a0ea;
    --card: #1e1e1e;
    --border: #333;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
}

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

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ===== 头部导航 ===== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }

.logo { font-weight: 700; font-size: 1.1rem; color: var(--fg); }
.logo:hover { text-decoration: none; color: var(--accent); }

.site-nav { display: flex; gap: 28px; }
.site-nav a { color: var(--fg); padding: 4px 2px; border-bottom: 2px solid transparent; }
.site-nav a:hover { text-decoration: none; color: var(--accent); }
.site-nav a.active { color: var(--accent); border-bottom-color: var(--accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--fg);
  transition: transform .25s, opacity .25s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 8px 24px 16px;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px 0; border-bottom: none; font-size: 1.05rem; }
}

/* ===== Hero ===== */

.hero { padding: 96px 0 64px; }
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  margin: 0 0 12px;
  letter-spacing: 0.02em;
}
.hero-tagline { font-size: 1.25rem; color: var(--accent); margin: 0 0 20px; font-weight: 600; }
.hero-intro { color: var(--muted); max-width: 46em; line-height: 1.85; }

/* ===== 区块 ===== */

.home-section { padding: 40px 0; }

.section-title {
  font-size: 1.5rem;
  margin: 0 0 24px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--accent);
  display: inline-block;
}

.page-head { padding: 56px 0 24px; }
.page-head h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 0 0 12px; }
.page-head .meta { color: var(--muted); margin: 0 0 6px; }
.page-head .numbers { color: var(--accent); font-weight: 600; margin: 8px 0 12px; }

.more-link { margin: 20px 0 0; }
.more-link a { font-weight: 600; }

/* ===== 卡片 ===== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.card-grid > * { display: flex; }
.card-grid .card { flex: 1; display: flex; flex-direction: column; }
.card-grid .card .tags { margin-top: auto; }

.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px;
  color: var(--fg);
  transition: transform .2s, box-shadow .2s;
}
.card:hover {
  text-decoration: none;
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.09);
  color: var(--fg);
}
.card h3 { margin: 0 0 10px; font-size: 1.15rem; }
.card > p { margin: 0 0 8px; color: var(--muted); font-size: 0.95rem; }
.card .numbers { color: var(--accent); font-size: 0.88rem; }
.card .meta, .card time { color: var(--muted); font-size: 0.85rem; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }

.tag {
  display: inline-block;
  font-size: 0.78rem;
  padding: 2px 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
}

/* ===== 技能 ===== */

.skills { display: grid; gap: 14px; }
.skill-row {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  padding: 14px 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.skill-label { font-weight: 700; color: var(--accent); }
.skill-row p { margin: 0; color: var(--muted); font-size: 0.95rem; }

@media (max-width: 600px) {
  .skill-row { grid-template-columns: 1fr; gap: 4px; }
}

/* ===== 文章排版 ===== */

.prose { padding-bottom: 64px; }
.prose h2 { margin-top: 2em; margin-bottom: 0.6em; font-size: 1.4rem; }
.prose h3 { margin-top: 1.6em; margin-bottom: 0.5em; font-size: 1.15rem; }
.prose p { line-height: 1.85; }
.prose ul, .prose ol { padding-left: 1.6em; }
.prose li { margin: 0.35em 0; line-height: 1.8; }
.prose blockquote {
  margin: 1.2em 0;
  padding: 4px 18px;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 5%, transparent);
  border-radius: 0 8px 8px 0;
  color: var(--muted);
}
.prose blockquote p { margin: 0.6em 0; }
.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: color-mix(in srgb, var(--fg) 8%, transparent);
  border-radius: 5px;
  padding: 2px 6px;
}
.prose pre {
  background: color-mix(in srgb, var(--fg) 92%, var(--bg));
  color: var(--bg);
  border-radius: 10px;
  padding: 16px 18px;
  overflow-x: auto;
  line-height: 1.6;
}
.prose pre code { background: none; padding: 0; font-size: 0.85rem; }
.prose table { border-collapse: collapse; width: 100%; margin: 1.2em 0; }
.prose th, .prose td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
.prose th { background: color-mix(in srgb, var(--fg) 5%, transparent); }

/* ===== 简历页 ===== */

.resume .item { margin: 0 0 26px; }
.resume .item h3 { margin: 0 0 4px; }
.resume .item .meta { color: var(--muted); font-size: 0.92rem; margin: 0 0 8px; }
.contact-note {
  margin-top: 40px;
  padding: 16px 20px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  color: var(--muted);
}

/* ===== 博客列表 ===== */

.blog-list { display: grid; gap: 16px; }
.blog-list .reveal { min-width: 0; }
.post-card time { display: block; margin-bottom: 6px; }

/* ===== 页脚 ===== */

.site-footer {
  margin-top: 48px;
  border-top: 1px solid var(--border);
  padding: 32px 0 40px;
  color: var(--muted);
}
.site-footer p { margin: 4px 0; }
.site-footer .contact { font-size: 0.88rem; }

/* ===== 滚动淡入 ===== */

.reveal { opacity: 0; transform: translateY(16px); transition: opacity .5s, transform .5s; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .card { transition: none; }
}