:root {
  --bg-1: #0b1020;
  --bg-2: #131a33;
  --card: rgba(255, 255, 255, 0.045);
  --card-hover: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.10);
  --text: #e8ecf6;
  --dim: #93a0bd;
  --accent: #6ea8fe;
  --accent-2: #8be9c0;
  --radius: 16px;
  --maxw: 780px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  line-height: 1.75;
  background:
    radial-gradient(1100px 620px at 12% -10%, rgba(110, 168, 254, 0.20), transparent 60%),
    radial-gradient(900px 520px at 92% 4%, rgba(139, 233, 192, 0.14), transparent 62%),
    linear-gradient(160deg, var(--bg-1) 0%, var(--bg-2) 55%, #0a0f1e 100%);
  background-attachment: fixed;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(11, 16, 32, 0.72);
  border-bottom: 1px solid var(--border);
}

.header-inner,
.main,
.footer-inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 62px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 650;
  font-size: 1.02rem;
  color: var(--text);
  letter-spacing: 0.2px;
}

.brand .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px rgba(110, 168, 254, 0.85);
}

.nav {
  display: flex;
  gap: 18px;
  font-size: 0.92rem;
  flex-wrap: wrap;
}

.nav a { color: var(--dim); }
.nav a:hover { color: var(--text); }

.main {
  padding-top: 34px;
  padding-bottom: 64px;
  min-height: 60vh;
}

.hero {
  padding: 18px 0 30px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 26px;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: clamp(1.6rem, 4.2vw, 2.2rem);
  letter-spacing: -0.3px;
  background: linear-gradient(120deg, #ffffff 12%, #a9c4ff 58%, #9df0d0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lead {
  margin: 0;
  color: var(--dim);
  font-size: 1rem;
}

.post-list {
  display: grid;
  gap: 14px;
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.card:hover {
  transform: translateY(-2px);
  background: var(--card-hover);
  border-color: rgba(110, 168, 254, 0.45);
}

.card-body {
  display: block;
  padding: 18px 20px;
  color: inherit;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 1.12rem;
  font-weight: 640;
  color: var(--text);
}

.excerpt {
  margin: 0 0 12px;
  color: var(--dim);
  font-size: 0.94rem;
  line-height: 1.68;
}

.meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--dim);
}

.meta .sep { opacity: 0.5; }

.tags {
  display: inline-flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-left: 2px;
}

.tag {
  padding: 1px 9px;
  border-radius: 999px;
  border: 1px solid rgba(110, 168, 254, 0.32);
  background: rgba(110, 168, 254, 0.10);
  color: #a8c6ff;
  font-size: 0.78rem;
}

a.tag:hover { color: #d7e6ff; border-color: rgba(139, 233, 192, 0.5); }

.more {
  margin-top: 24px;
  font-size: 0.94rem;
}

.page-head {
  margin-bottom: 26px;
}

.page-head h1 {
  margin: 0 0 10px;
  font-size: clamp(1.42rem, 3.6vw, 1.85rem);
  letter-spacing: -0.2px;
}

.page-intro {
  color: var(--dim);
  font-size: 0.95rem;
}

.post .content {
  font-size: 1rem;
}

.content h2 {
  margin: 34px 0 12px;
  font-size: 1.24rem;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.content h3 {
  margin: 26px 0 10px;
  font-size: 1.06rem;
}

.content p { margin: 0 0 16px; }

.content ul, .content ol { margin: 0 0 16px; padding-left: 22px; }
.content li { margin-bottom: 6px; }

.content blockquote {
  margin: 0 0 16px;
  padding: 10px 16px;
  border-left: 3px solid var(--accent);
  background: rgba(110, 168, 254, 0.07);
  border-radius: 0 10px 10px 0;
  color: var(--dim);
}

.content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.09);
  color: #cfe0ff;
}

.content pre {
  margin: 0 0 18px;
  padding: 15px 17px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(6, 10, 22, 0.82);
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.62;
}

.content pre code {
  padding: 0;
  background: none;
  color: inherit;
  font-size: inherit;
}

.content img {
  max-width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 18px;
  font-size: 0.92rem;
}

.content th, .content td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  text-align: left;
}

.content th { background: rgba(255, 255, 255, 0.05); }

.content hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 28px 0;
}

.post-nav {
  margin-top: 40px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
}

.term-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.term-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  color: var(--text);
  transition: background 0.18s ease, border-color 0.18s ease;
}

.term-list a:hover {
  background: var(--card-hover);
  border-color: rgba(110, 168, 254, 0.45);
}

.term-count { color: var(--dim); font-size: 0.85rem; }

.dim { color: var(--dim); }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 26px 0 34px;
  font-size: 0.86rem;
  color: var(--dim);
  text-align: center;
}

.footer-inner p { margin: 4px 0; }

@media (max-width: 600px) {
  .header-inner { height: auto; padding: 12px 20px; flex-direction: column; align-items: flex-start; gap: 8px; }
  .nav { gap: 14px; }
  .main { padding-top: 24px; }
  .card-body { padding: 16px 16px; }
}