:root {
  --bg: #0f1115;
  --bg-soft: #161922;
  --surface: #1c212b;
  --border: #2a313d;
  --text: #e6e9ef;
  --text-dim: #9aa3b2;
  --accent: #6ea8fe;
  --accent-soft: #2a3a5c;
  --radius: 14px;
  --maxw: 960px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(15, 17, 21, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.brand { font-weight: 700; letter-spacing: .5px; color: var(--text); }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; gap: 22px; }
.nav-links a { color: var(--text-dim); font-size: 15px; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero { padding: 88px 0 64px; }
.hero h1 {
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.15; margin: 0 0 18px; font-weight: 800;
}
.hero .tag {
  display: inline-block; font-size: 14px; color: var(--accent);
  border: 1px solid var(--accent-soft); border-radius: 999px;
  padding: 4px 14px; margin-bottom: 22px;
}
.hero p { color: var(--text-dim); font-size: 18px; max-width: 620px; }
.hero .cta { margin-top: 30px; display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 11px 22px; border-radius: var(--radius);
  font-size: 15px; font-weight: 600; border: 1px solid transparent;
  transition: transform .12s ease, background .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: #0b1220; }
.btn-ghost { border-color: var(--border); color: var(--text); }

/* Sections */
section { padding: 56px 0; border-top: 1px solid var(--border); }
.section-title { font-size: 13px; text-transform: uppercase; letter-spacing: 2px; color: var(--text-dim); margin: 0 0 28px; }

/* Cards / works */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; transition: border-color .2s, transform .12s;
}
.card:hover { border-color: var(--accent); transform: translateY(-3px); }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--text-dim); font-size: 14px; }
.card .meta { margin-top: 14px; font-size: 12px; color: var(--text-dim); }

/* Blog list */
.post { padding: 22px 0; border-bottom: 1px solid var(--border); }
.post:last-child { border-bottom: none; }
.post h3 { margin: 0 0 6px; font-size: 20px; }
.post h3 a { color: var(--text); }
.post h3 a:hover { color: var(--accent); text-decoration: none; }
.post .date { font-size: 13px; color: var(--text-dim); }
.post p { color: var(--text-dim); margin: 8px 0 0; }

/* Article */
.article { padding: 56px 0 80px; }
.article h1 { font-size: clamp(28px, 5vw, 40px); margin: 0 0 10px; }
.article .date { color: var(--text-dim); font-size: 14px; margin-bottom: 30px; }
.article p, .article li { color: #d4d9e2; }
.article h2 { margin-top: 40px; font-size: 24px; }
.article pre { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 10px; padding: 16px; overflow: auto; }
.article code { font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 14px; }
.article :not(pre) > code { background: var(--accent-soft); padding: 2px 6px; border-radius: 6px; color: #cfe0ff; }

/* Footer */
footer { border-top: 1px solid var(--border); padding: 36px 0; color: var(--text-dim); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

/* Responsive */
@media (max-width: 600px) {
  .nav-links { gap: 14px; font-size: 14px; }
  .hero { padding: 60px 0 44px; }
}