:root{
  --bg:#0f1115;
  --panel:#171a21;
  --panel-2:#1e222b;
  --line:#2a3040;
  --text:#e6e8ee;
  --muted:#9aa3b2;
  --accent:#4f8cff;
  --accent-2:#22c1a0;
  --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",Roboto,"Helvetica Neue",sans-serif;
  line-height:1.65;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
a{color:inherit;text-decoration:none;transition:color .2s}
a:hover{color:var(--accent)}
.container{width:min(1120px,92vw);margin:0 auto}
main.container{flex:1;padding:32px 0 64px}

/* header */
.site-header{background:rgba(15,17,21,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.header-inner{display:flex;align-items:center;gap:24px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:.5px}
.logo-mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:grid;place-items:center;font-size:15px;color:#fff}
.search{display:flex;flex:1;max-width:360px;background:var(--panel);border:1px solid var(--line);border-radius:999px;overflow:hidden}
.search input{flex:1;background:transparent;border:0;outline:none;color:var(--text);padding:8px 14px;font-size:14px}
.search button{background:transparent;border:0;color:var(--muted);padding:0 14px;cursor:pointer;font-size:14px}
.search button:hover{color:var(--accent)}
.nav{display:flex;gap:6px;margin-left:auto}
.nav a{padding:8px 14px;border-radius:999px;font-size:14px;color:var(--muted)}
.nav a:hover{background:var(--panel-2);color:var(--text)}
.nav a.active{background:var(--panel-2);color:var(--text);box-shadow:inset 0 0 0 1px var(--line)}

/* hero */
.hero{display:grid;grid-template-columns:1.6fr 1fr;gap:24px;margin-bottom:48px}
.hero-text{background:radial-gradient(120% 120% at 0% 0%,#1c2a4a 0%,var(--panel) 55%);border:1px solid var(--line);border-radius:var(--radius);padding:40px}
.pill{display:inline-block;font-size:12px;color:#bcd0ff;background:rgba(79,140,255,.12);border:1px solid rgba(79,140,255,.35);padding:4px 10px;border-radius:999px;margin-bottom:16px}
.hero h1{font-size:34px;line-height:1.3;margin:0 0 12px}
.hero p{color:var(--muted);margin:0 0 24px;max-width:46ch}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:10px 18px;border-radius:10px;font-size:14px;font-weight:600;border:1px solid transparent;cursor:pointer}
.btn.primary{background:var(--accent);color:#fff}
.btn.primary:hover{background:#3d7bf0;color:#fff}
.btn.ghost{border-color:var(--line);color:var(--text);background:var(--panel-2)}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent)}
.hero-side{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.hero-side h4{margin:0 0 14px;font-size:13px;color:var(--muted);letter-spacing:1px;text-transform:uppercase}
.hot-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.hot-list a{font-size:14px;color:#b6c0d0}
.hot-list a:hover{color:var(--accent)}

/* sections */
.section{margin-bottom:48px}
.section-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:18px}
.section-head h2,.section h2{font-size:20px;margin:0}
.more{font-size:13px;color:var(--muted)}

/* cards */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);transition:transform .2s,border-color .2s;overflow:hidden}

/* 渐进增强动画：仅当 JS 添加 .reveal 后才生效；无 JS 时内容正常可见 */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .4s ease,transform .4s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){.reveal{opacity:1;transform:none;transition:none}}
.card:hover{transform:translateY(-3px);border-color:#3a4761}
.card-link{display:block;padding:20px;height:100%}
.card-top{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:12px}
.tag{font-size:12px;color:var(--accent-2);background:rgba(34,193,160,.1);border:1px solid rgba(34,193,160,.3);padding:2px 8px;border-radius:6px}
.card h3{font-size:16px;margin:0 0 8px;line-height:1.5}
.card p{font-size:13px;color:var(--muted);margin:0 0 16px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{font-size:12px;color:#7b8595}

/* chips */
.chips,.toolbar{display:flex;gap:10px;flex-wrap:wrap}
.toolbar{margin-bottom:24px}
.chip{font-size:13px;padding:6px 14px;border-radius:999px;border:1px solid var(--line);color:var(--muted);background:var(--panel)}
.chip:hover{color:var(--text);border-color:#3a4761}
.chip.active{background:rgba(79,140,255,.14);border-color:rgba(79,140,255,.5);color:#cddcff}

/* page head */
.page-head{margin-bottom:24px}
.page-head h1{font-size:26px;margin:0 0 6px}
.page-head p{color:var(--muted);margin:0;font-size:14px}

/* article */
.article{max-width:760px;margin:0 auto}
.article-meta{display:flex;gap:14px;align-items:center;font-size:13px;color:var(--muted);margin-bottom:14px;flex-wrap:wrap}
.article h1{font-size:30px;line-height:1.35;margin:0 0 14px}
.lead{font-size:16px;color:#b8c2d2;border-left:3px solid var(--accent);padding-left:14px;margin:0 0 28px}
.article-body p{font-size:15.5px;color:#cfd5e0;margin:0 0 18px}
.pager{display:flex;justify-content:space-between;gap:16px;margin:36px 0 20px;padding-top:20px;border-top:1px solid var(--line);font-size:14px}
.pager a{color:var(--accent)}
.back{font-size:14px;color:var(--muted)}

/* about */
.about{max-width:780px}
.about h1{font-size:28px}
.about p,.feature-list li{color:#c3cad6}
.feature-list{padding-left:20px;line-height:2}
pre{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px;overflow:auto;font-size:13px}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em}
.muted{color:var(--muted);font-size:14px}

/* empty / 404 */
.empty,.notfound{text-align:center;padding:80px 0}
.notfound .code{font-size:72px;font-weight:800;margin:0;background:linear-gradient(135deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}

/* footer */
.site-footer{border-top:1px solid var(--line);background:var(--panel);padding:32px 0;margin-top:auto}
.footer-inner{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center}
.footer-inner strong{font-size:15px}
.footer-inner p{margin:4px 0 0;color:var(--muted);font-size:13px}
.footer-links{display:flex;gap:16px;font-size:13px;color:var(--muted)}
.copy{grid-column:1/-1;border-top:1px solid var(--line);padding-top:16px;margin-top:8px !important;font-size:12px}

@media(max-width:900px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .hero{grid-template-columns:1fr}
  .search{display:none}
}
@media(max-width:600px){
  .grid{grid-template-columns:1fr}
  .hero h1{font-size:26px}
  .hero-text{padding:26px}
  .nav a{padding:6px 10px}
  .footer-inner{grid-template-columns:1fr}
}