/* novacore v2 —— 深空科技美学：网格微光 + 渐变字 + 玻璃拟态 */
:root{
  --bg:#05070f; --bg2:#0a0f22;
  --card:rgba(255,255,255,.032);
  --line:rgba(148,178,255,.13);
  --text:#f2f5ff; --muted:#9aa6cb; --faint:#626e96;
  --accent:#4f7cff; --accent2:#8db1ff; --cyan:#3fe0ff;
  --glow:rgba(79,124,255,.30);
  --radius:20px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.75;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
a{color:var(--accent2);text-decoration:none;transition:color .2s}
a:hover{color:#c3d6ff}
::selection{background:rgba(79,124,255,.4)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:#232c4d;border-radius:6px}

/* —— 顶栏 —— */
.site-header{position:sticky;top:0;z-index:50;
  background:rgba(5,7,15,.78);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line)}
.site-header .nav{display:flex;align-items:center;gap:26px;padding:15px 24px}
.brand{font-size:21px;font-weight:800;letter-spacing:2px;color:#fff !important;
  white-space:nowrap;flex-shrink:0}
.brand:hover{text-decoration:none}
.brand em{font-style:normal;background:linear-gradient(120deg,var(--accent2),var(--cyan));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.site-header nav{margin-left:auto;display:flex;gap:2px;align-items:center;overflow-x:auto;
  scrollbar-width:none;flex-shrink:1}
.site-header nav::-webkit-scrollbar{display:none}
.site-header nav a,.site-header nav .nav-drop>a{color:var(--muted);padding:9px 15px;border-radius:10px;
  font-size:15px;white-space:nowrap;flex-shrink:0}
.site-header nav a:hover{color:#fff;background:rgba(255,255,255,.07);text-decoration:none}
.nav-drop{position:relative;flex-shrink:0}
.nav-sub{display:none;position:absolute;top:calc(100% + 6px);left:0;min-width:190px;background:#0d1330;
  border:1px solid var(--line);border-radius:14px;padding:8px;box-shadow:0 18px 44px rgba(0,0,0,.55)}
.nav-drop:hover .nav-sub,.nav-drop:focus-within .nav-sub{display:block}
.nav-sub a{display:block !important}
.lang-switch{margin-left:6px;font-size:13px;color:var(--faint);white-space:nowrap;flex-shrink:0}
.lang-switch a{color:var(--faint);margin:0 5px}
.lang-switch strong{color:#fff;margin:0 5px}
.lang-sep{color:#3a4468;margin:0 2px}

/* —— 主视觉 —— */
.hero{position:relative;overflow:hidden;text-align:center;padding:132px 24px 104px;
  background:linear-gradient(180deg,var(--bg2),var(--bg))}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),
    linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:54px 54px;
  -webkit-mask-image:radial-gradient(ellipse 85% 75% at 50% 28%,#000 25%,transparent 78%);
  mask-image:radial-gradient(ellipse 85% 75% at 50% 28%,#000 25%,transparent 78%);
  opacity:.5}
.hero::after{content:"";position:absolute;left:50%;top:-180px;width:640px;height:420px;
  transform:translateX(-50%);pointer-events:none;
  background:radial-gradient(closest-side,var(--glow),transparent 72%);filter:blur(10px)}
.hero .wrap{position:relative;z-index:1}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:3px;color:var(--accent2);
  border:1px solid rgba(141,177,255,.35);border-radius:999px;padding:7px 20px;margin-bottom:26px;
  background:rgba(79,124,255,.10)}
.hero h1{font-size:clamp(38px,7vw,72px);margin:0 0 22px;font-weight:800;letter-spacing:2px;line-height:1.25;
  background:linear-gradient(180deg,#ffffff 30%,#a9c2ff 90%);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lede{color:var(--muted);font-size:clamp(16px,2.4vw,20px);max-width:660px;margin:0 auto 40px}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;background:linear-gradient(120deg,var(--accent),#3a63e8);color:#fff !important;
  font-weight:700;padding:14px 38px;border-radius:999px;font-size:16px;
  box-shadow:0 8px 30px var(--glow);transition:transform .18s,box-shadow .18s}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 38px rgba(79,124,255,.5);text-decoration:none}
.btn.ghost{background:rgba(255,255,255,.05);border:1px solid var(--line);box-shadow:none;color:var(--text) !important}
.btn.ghost:hover{background:rgba(255,255,255,.10);box-shadow:none}

/* —— 通用区块 —— */
.section{padding:84px 0}
.eyebrow2{display:block;text-align:center;font-size:13px;font-weight:700;letter-spacing:4px;
  color:var(--accent2);margin-bottom:14px}
.section h2.sec-title{text-align:center;font-size:clamp(26px,4vw,38px);color:#fff;margin:0 0 16px;letter-spacing:1px}
.section p.sec-sub{text-align:center;color:var(--muted);max-width:620px;margin:0 auto 52px}

/* —— 特性卡片 —— */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.card{position:relative;overflow:hidden;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);padding:34px 28px;
  backdrop-filter:blur(6px);transition:transform .22s,border-color .22s,box-shadow .22s}
.card::before{content:"";position:absolute;top:0;left:8%;right:8%;height:2px;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--accent),var(--cyan),transparent);opacity:.85}
.card:hover{transform:translateY(-6px);border-color:rgba(141,177,255,.4);
  box-shadow:0 20px 48px rgba(0,0,0,.45),0 0 0 1px rgba(141,177,255,.12)}
.card .kicker{font-size:12px;font-weight:700;letter-spacing:3px;color:var(--cyan);margin-bottom:12px}
.card h3{margin:0 0 12px;font-size:21px;color:#fff;letter-spacing:.5px}
.card p{margin:0;color:var(--muted);font-size:15px}

/* —— 新闻 —— */
.news{background:linear-gradient(180deg,transparent,rgba(79,124,255,.05),transparent)}
.post-list{list-style:none;margin:0;padding:0;max-width:760px;margin:0 auto}
.post-list li{padding:18px 6px;border-bottom:1px solid var(--line);display:flex;gap:18px;align-items:baseline;
  transition:padding-left .2s}
.post-list li:hover{padding-left:14px}
.post-list .date{color:var(--faint);font-size:13px;white-space:nowrap;font-variant-numeric:tabular-nums}
.post-list a{color:var(--text);font-size:17px}
.post-list a:hover{color:var(--accent2);text-decoration:none}
.more{text-align:center;margin-top:30px}
.pager{display:flex;gap:18px;align-items:center;justify-content:center;margin-top:30px;color:var(--muted)}

/* —— 文章页 —— */
.page-head{position:relative;text-align:center;padding:96px 24px 20px;overflow:hidden;
  background:radial-gradient(560px 280px at 50% -40px,var(--glow),transparent 72%)}
.page-head .eyebrow{margin-bottom:18px}
.page-head h1{font-size:clamp(30px,5.4vw,52px);margin:0 0 16px;font-weight:800;letter-spacing:1px;
  background:linear-gradient(180deg,#fff 40%,#a9c2ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.page-head .meta{color:var(--faint);font-size:14px;letter-spacing:1px}
.prose{max-width:780px;margin:0 auto;padding:44px 24px 96px;font-size:17px}
.prose h2,.prose h3{color:#fff;line-height:1.4;letter-spacing:.5px}
.prose h2{margin-top:2.4em;font-size:26px;border-bottom:1px solid var(--line);padding-bottom:10px}
.prose h3{margin-top:2em;font-size:20px}
.prose p{margin:1.2em 0}
.prose img{max-width:100%;border-radius:14px;box-shadow:0 12px 40px rgba(0,0,0,.4)}
.prose pre{background:#080c1c;border:1px solid var(--line);border-radius:14px;padding:20px;overflow:auto;
  font-size:14.5px;box-shadow:inset 0 1px 0 rgba(255,255,255,.04)}
.prose code{font-family:var(--mono);font-size:.88em}
.prose :not(pre)>code{background:rgba(79,124,255,.14);color:#bcd2ff;padding:3px 8px;border-radius:7px}
.prose table{border-collapse:collapse;width:100%;margin:1.6em 0;font-size:15.5px}
.prose th,.prose td{border:1px solid var(--line);padding:11px 16px;text-align:left}
.prose th{background:rgba(255,255,255,.045);color:#fff}
.prose blockquote{border-left:3px solid var(--accent);margin:1.8em 0;padding:6px 22px;color:var(--muted);
  background:rgba(79,124,255,.06);border-radius:0 12px 12px 0}
.prose ul,.prose ol{padding-left:1.4em}
.prose li{margin:.5em 0}
.prose li::marker{color:var(--accent)}
.toc{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 24px;margin:2em 0}
.toc ul{margin:0;padding-left:1.2em}
.toc a{color:var(--muted);font-size:15px}

/* —— 联系 —— */
.contact-wrap{max-width:660px;margin:0 auto;padding:20px 24px 96px}
.contact-form{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:36px 32px;backdrop-filter:blur(6px)}
.contact-form label{display:block;font-size:14px;font-weight:600;color:var(--muted);margin-bottom:18px}
.contact-form input,.contact-form textarea{width:100%;margin-top:8px;background:#080c1c;
  border:1px solid var(--line);border-radius:12px;padding:13px 16px;color:var(--text);font-size:16px;font-family:var(--font)}
.contact-form input:focus,.contact-form textarea:focus{border-color:var(--accent);outline:none;
  box-shadow:0 0 0 3px rgba(79,124,255,.18)}
.contact-form input:disabled,.contact-form textarea:disabled{opacity:.55;cursor:not-allowed}
.contact-form .btn{border:none;cursor:pointer;width:100%;margin-top:6px}
.contact-form .btn:disabled{background:#2a3358;box-shadow:none;cursor:not-allowed;transform:none}
.form-note{text-align:center;color:var(--faint);font-size:13.5px;margin-top:18px}

/* —— 归档 / 标签 / 搜索 —— */
.arch-year{color:#fff;margin:40px 0 6px;font-size:23px;letter-spacing:1px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:12px;padding:36px 0;justify-content:center}
.tag-cloud a{background:var(--card);border:1px solid var(--line);border-radius:999px;
  padding:10px 22px;color:var(--text);transition:all .2s}
.tag-cloud a:hover{border-color:var(--accent);transform:translateY(-2px);text-decoration:none}
.search-box{max-width:640px;margin:36px auto;display:flex;gap:10px;padding:0 24px}
.search-box input{flex:1;background:#080c1c;border:1px solid var(--line);border-radius:14px;
  padding:14px 20px;color:var(--text);font-size:16px;font-family:var(--font)}
.search-box input:focus{border-color:var(--accent);outline:none}
.search-box button{background:linear-gradient(120deg,var(--accent),#3a63e8);color:#fff;border:none;
  border-radius:14px;padding:0 30px;font-size:16px;cursor:pointer}

/* —— 页脚 —— */
.site-footer{border-top:1px solid var(--line);background:rgba(255,255,255,.012);
  padding:56px 0 0;color:var(--muted);font-size:14.5px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;margin-bottom:44px}
.foot-brand{font-size:20px;font-weight:800;letter-spacing:2px;color:#fff;margin-bottom:12px}
.foot-brand em{font-style:normal;background:linear-gradient(120deg,var(--accent2),var(--cyan));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.foot-grid p{margin:0;max-width:300px}
.foot-grid h4{color:#fff;font-size:14px;letter-spacing:2px;margin:0 0 14px}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-grid li{margin:9px 0}
.foot-grid a{color:var(--muted)}
.foot-grid a:hover{color:#fff}
.foot-bottom{border-top:1px solid var(--line);padding:22px 0;text-align:center;color:var(--faint);font-size:13.5px}

/* —— 滚动显现 —— */
.rv{opacity:0;transition:opacity .8s ease,transform .8s cubic-bezier(.22,.61,.36,1)}
.rv[data-reveal="up"]{transform:translateY(38px)}
.rv[data-reveal="down"]{transform:translateY(-38px)}
.rv[data-reveal="left"]{transform:translateX(-52px)}
.rv[data-reveal="right"]{transform:translateX(52px)}
.rv[data-reveal="zoom"]{transform:scale(.93)}
.rv.in{opacity:1;transform:none}
.rv[data-delay="1"]{transition-delay:.1s}
.rv[data-delay="2"]{transition-delay:.2s}
.rv[data-delay="3"]{transition-delay:.3s}
@media (prefers-reduced-motion:reduce){
  .rv{opacity:1 !important;transform:none !important;transition:none}
  html{scroll-behavior:auto}
}

@media (max-width:720px){
  .hero{padding:92px 20px 72px}
  .section{padding:60px 0}
  .site-header .nav{gap:14px;padding:13px 16px}
  .site-header nav a{padding:8px 10px;font-size:14px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .foot-grid p{display:none}
  .contact-form{padding:26px 20px}
  .prose{font-size:16px}
}