:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --bg-card: #ffffff;
  --text: #1f2328;
  --text-soft: #5b636d;
  --text-mute: #8b939c;
  --border: #e6e8eb;
  --brand: #b03a2e;
  --brand-soft: #f7ecea;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px rgba(16, 24, 40, .06);
  --maxw: 1100px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .5px;
}
.logo:hover { text-decoration: none; }

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 17px;
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: block;
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--text-soft);
  font-size: 15px;
}
.nav-links a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.nav-links a.active { color: var(--brand); background: var(--brand-soft); font-weight: 600; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
}

/* ---------- 通用区块 ---------- */
.section { padding: 56px 0; }
.section-soft { background: var(--bg-soft); }

.section-head { margin-bottom: 28px; }
.section-head h2 {
  margin: 0 0 6px;
  font-size: 24px;
  letter-spacing: .5px;
}
.section-head p { margin: 0; color: var(--text-mute); font-size: 15px; }

.page-head { padding: 48px 0 24px; border-bottom: 1px solid var(--border); }
.page-head h1 { margin: 0 0 8px; font-size: 30px; letter-spacing: 1px; }
.page-head p { margin: 0; color: var(--text-soft); }

/* ---------- 首页 Hero ---------- */
.hero {
  padding: 72px 0 64px;
  background: linear-gradient(180deg, #fbf7f6 0%, #ffffff 100%);
  border-bottom: 1px solid var(--border);
}
.hero h1 {
  margin: 0 0 16px;
  font-size: 38px;
  line-height: 1.4;
  letter-spacing: 1px;
}
.hero .lead {
  max-width: 640px;
  margin: 0 0 28px;
  color: var(--text-soft);
  font-size: 17px;
}
.hero-tag {
  display: inline-block;
  margin-bottom: 18px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 13px;
  letter-spacing: 1px;
}

.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 15px;
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #fff;
}
.btn:hover { opacity: .88; text-decoration: none; }
.btn-ghost { background: #fff; color: var(--brand); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card h3 a { color: var(--text); }
.card h3 a:hover { color: var(--brand); text-decoration: none; }
.card p { margin: 0 0 14px; color: var(--text-soft); font-size: 15px; }

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-mute);
  font-size: 13px;
}
.tag {
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-soft);
  font-size: 12px;
}

/* ---------- 文章列表 ---------- */
.post-list { list-style: none; margin: 0; padding: 0; }
.post-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.post-item h3 { margin: 0 0 8px; font-size: 20px; }
.post-item h3 a { color: var(--text); }
.post-item h3 a:hover { color: var(--brand); text-decoration: none; }
.post-item p { margin: 0 0 12px; color: var(--text-soft); }

/* ---------- 人物卡片 ---------- */
.person {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.avatar {
  flex: 0 0 auto;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand);
  display: grid;
  place-items: center;
  font-size: 20px;
  font-weight: 700;
}
.person-body h3 { margin: 0 0 2px; font-size: 18px; }
.person-role { margin: 0 0 10px; color: var(--brand); font-size: 13px; letter-spacing: .5px; }
.person-body p { margin: 0 0 10px; color: var(--text-soft); font-size: 15px; }
.quote {
  margin: 0;
  padding-left: 12px;
  border-left: 3px solid var(--border);
  color: var(--text-mute);
  font-size: 14px;
}

/* ---------- 正文排版 ---------- */
.article { padding: 40px 0 56px; }
.article-header { margin-bottom: 28px; }
.article-header h1 { margin: 0 0 12px; font-size: 30px; line-height: 1.5; }
.article-body { max-width: 760px; }
.article-body h2 {
  margin: 36px 0 12px;
  padding-left: 12px;
  border-left: 4px solid var(--brand);
  font-size: 20px;
}
.article-body h3 { margin: 26px 0 10px; font-size: 17px; }
.article-body p { margin: 0 0 16px; }
.article-body ul, .article-body ol { margin: 0 0 16px; padding-left: 22px; }
.article-body li { margin-bottom: 8px; }
.article-body blockquote {
  margin: 20px 0;
  padding: 14px 18px;
  border-left: 4px solid var(--border);
  background: var(--bg-soft);
  border-radius: 0 8px 8px 0;
  color: var(--text-soft);
}
.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 15px;
}

/* ---------- 信息表 ---------- */
.info-list { list-style: none; margin: 0; padding: 0; }
.info-list li {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 15px;
}
.info-list li:last-child { border-bottom: none; }
.info-list .k { flex: 0 0 96px; color: var(--text-mute); }

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 8px;
  padding: 40px 0 28px;
  background: #fafbfc;
  border-top: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 14px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.footer-top h4 { margin: 0 0 12px; font-size: 15px; color: var(--text); }
.footer-top ul { list-style: none; margin: 0; padding: 0; }
.footer-top li { margin-bottom: 8px; }
.footer-top a { color: var(--text-soft); }
.footer-top a:hover { color: var(--brand); }

.footer-bottom {
  padding-top: 20px;
  text-align: center;
  color: var(--text-mute);
  font-size: 13px;
  line-height: 2;
}
.beian { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px; }
.beian a { color: var(--text-mute); }
.beian a:hover { color: var(--brand); }
.beian img { display: inline-block; vertical-align: -3px; margin-right: 4px; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .hero { padding: 48px 0 40px; }
  .hero h1 { font-size: 27px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 16px 14px;
    background: #fff;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .article-header h1 { font-size: 24px; }
  .page-head h1 { font-size: 24px; }
}