/* 博曦云科技 前台样式 - 简洁现代科技风 */
:root{
  --blue:#1f6feb;
  --blue-dark:#0b4fc4;
  --orange:#ff8a34;
  --orange-dark:#f26a10;
  --text:#1c2430;
  --muted:#6b7787;
  --line:#e8ecf2;
  --bg:#ffffff;
  --bg-soft:#f5f8fc;
  --radius:12px;
  --shadow:0 6px 24px rgba(24,52,94,.08);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.75;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
.narrow{max-width:820px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:66px}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{height:34px;width:auto}
.brand-name{font-size:19px;font-weight:700;color:#0f2743;letter-spacing:.5px;white-space:nowrap}
.site-nav{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.nav-link{font-size:16px;color:var(--text);padding:6px 0;position:relative}
.nav-link:hover,.nav-link.active{color:var(--blue)}
.nav-search{display:flex;align-items:center;border:1px solid var(--line);border-radius:20px;overflow:hidden;background:#fff}
.nav-search input{border:none;outline:none;padding:7px 12px;width:170px;font-size:14px;background:transparent}
.nav-search button{border:none;background:var(--blue);color:#fff;padding:7px 14px;font-size:14px;cursor:pointer}
.nav-search button:hover{background:var(--blue-dark)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;font-size:20px;padding:4px 10px;cursor:pointer;color:var(--text)}

/* Hero */
.hero{background:linear-gradient(135deg,#eef4ff 0%,#ffffff 55%,#fff4ec 100%);border-bottom:1px solid var(--line)}
.hero-inner{display:flex;gap:40px;align-items:center;padding:64px 20px;flex-wrap:wrap}
.hero-text{flex:1 1 460px;min-width:280px}
.hero-sub{letter-spacing:3px;color:var(--orange-dark);font-weight:600;margin:0 0 8px;font-size:14px}
.hero-text h1{font-size:40px;line-height:1.3;margin:0 0 16px;color:#0f2743}
.hero-desc{color:var(--muted);font-size:16px;margin:0 0 24px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-stats{flex:1 1 300px;display:grid;grid-template-columns:1fr;gap:14px;min-width:260px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}
.stat .num{display:block;font-size:26px;font-weight:700;color:var(--blue)}
.stat .label{color:var(--muted);font-size:14px}

.btn{display:inline-block;padding:11px 22px;border-radius:8px;font-size:15px;transition:.2s}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 4px 14px rgba(31,111,235,.25)}
.btn-primary:hover{background:var(--blue-dark);color:#fff}
.btn-ghost{border:1px solid var(--blue);color:var(--blue);background:#fff}
.btn-ghost:hover{background:#f0f6ff}

/* Section */
.section{padding:56px 0}
.section.alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px;flex-wrap:wrap}
.section-head h1,.section-head h2{font-size:26px;margin:0;color:#0f2743}
.section-head p{color:var(--muted);margin:6px 0 0;font-size:15px}
.more{color:var(--blue);font-size:14px}

/* Category cards */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cat-card{border:1px solid var(--line);border-radius:var(--radius);padding:22px;background:#fff;transition:.25s;box-shadow:0 2px 10px rgba(24,52,94,.04)}
.cat-card:hover{border-color:var(--blue);transform:translateY(-3px);box-shadow:var(--shadow)}
.cat-card h3{margin:0 0 6px;font-size:18px;color:#0f2743}
.cat-card p{margin:0;color:var(--muted);font-size:14px}
.cat-card:nth-child(1){border-top:3px solid var(--blue)}
.cat-card:nth-child(2){border-top:3px solid var(--orange)}
.cat-card:nth-child(3){border-top:3px solid #6c5ce7}
.cat-card:nth-child(4){border-top:3px solid #00b894}

/* Post cards */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;display:flex;flex-direction:column;transition:.25s}
.post-card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.post-thumb{display:block;height:170px;background-size:cover;background-position:center;background-color:var(--bg-soft)}
.post-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.cat-tag{align-self:flex-start;background:#eaf2ff;color:var(--blue);font-size:12px;padding:3px 10px;border-radius:20px}
.post-card h2,.post-card h3{margin:0;font-size:17px;line-height:1.5;color:#0f2743}
.post-card h2 a:hover,.post-card h3 a:hover{color:var(--blue)}
.post-summary{margin:0;color:var(--muted);font-size:14px;flex:1}
.post-meta{display:flex;justify-content:space-between;color:#98a2b3;font-size:13px;border-top:1px dashed var(--line);padding-top:10px}
.empty{color:var(--muted);padding:40px 0;text-align:center}

/* Pagination */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.pagination .page{padding:8px 14px;border:1px solid var(--line);border-radius:8px;font-size:14px;background:#fff;color:var(--text)}
.pagination .page:hover{border-color:var(--blue);color:var(--blue)}
.pagination .page.current{background:var(--blue);color:#fff;border-color:var(--blue)}
.pagination .dots{padding:8px 4px;color:var(--muted)}

/* CTA */
.cta{background:linear-gradient(120deg,#0b4fc4,#1f6feb 60%,#3a8bff);color:#fff}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta-inner h2{margin:0 0 8px;font-size:24px;color:#fff}
.cta-inner p{margin:0;color:rgba(255,255,255,.88);font-size:15px}
.cta .btn-primary{background:#fff;color:var(--blue-dark);box-shadow:none;font-weight:600}
.cta .btn-primary:hover{background:#fff4ec;color:var(--orange-dark)}

/* Article */
.article-page{padding:36px 0 60px}
.crumbs{color:var(--muted);font-size:14px;margin-bottom:18px;display:flex;gap:8px;flex-wrap:wrap}
.crumbs a:hover{color:var(--blue)}
.crumbs .sep{color:#c6ced9}
.article-title{font-size:32px;line-height:1.4;margin:0 0 8px;color:#0f2743}
.article-subtitle{color:var(--muted);margin:0 0 14px;font-size:17px}
.article-meta{display:flex;gap:18px;flex-wrap:wrap;color:#98a2b3;font-size:14px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.article-meta a{color:var(--blue)}
.article-cover{margin:22px 0}
.article-cover img{border-radius:var(--radius);width:100%}
.article-summary{background:var(--bg-soft);border-left:3px solid var(--orange);padding:14px 16px;border-radius:0 var(--radius) var(--radius) 0;color:#4a5568;font-size:15px;margin-bottom:22px}
.article-content{font-size:16.5px;color:#26303c;line-height:1.9}
.article-content h2{font-size:22px;margin:30px 0 14px;color:#0f2743}
.article-content h3{font-size:19px;margin:24px 0 12px;color:#0f2743}
.article-content p{margin:0 0 16px}
.article-content img{border-radius:8px;margin:14px 0;max-width:100%;height:auto}
.article-content ul,.article-content ol{padding-left:24px;margin:0 0 16px}
.article-content li{margin-bottom:6px}
.article-content blockquote{margin:18px 0;padding:12px 16px;border-left:3px solid var(--blue);background:#f7faff;color:#4a5568}
.article-content a{color:var(--blue);text-decoration:underline}
.article-nav{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:34px 0 0;padding-top:20px;border-top:1px solid var(--line);font-size:15px}
.article-nav a:hover{color:var(--blue)}
.related h2{font-size:20px;margin:36px 0 12px;color:#0f2743}
.related ul{list-style:none;padding:0;margin:0}
.related li{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:15px}
.related li a:hover{color:var(--blue)}
.related li span{color:#98a2b3;font-size:14px;white-space:nowrap}

/* Footer */
.site-footer{background:#0f2743;color:rgba(255,255,255,.75);margin-top:40px}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px;padding:44px 20px 30px}
.footer-logo{height:26px;filter:brightness(0) invert(1);margin-bottom:14px}
.footer-desc{font-size:14px;margin:0 0 10px}
.footer-line{font-size:13px;color:var(--orange);margin:0}
.footer-col h3{color:#fff;font-size:16px;margin:0 0 12px}
.footer-col ul{list-style:none;padding:0;margin:0;font-size:14px}
.footer-col li{margin-bottom:8px}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;gap:18px;flex-wrap:wrap;justify-content:space-between;border-top:1px solid rgba(255,255,255,.12);padding:16px 20px;font-size:13px}
.footer-bottom a:hover{color:#fff}

/* Responsive */
@media (max-width:1024px){
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  body{font-size:15.5px}
  .nav-toggle{display:block}
  .site-nav{display:none;width:100%;flex-direction:column;align-items:flex-start;gap:0;padding:8px 0 14px}
  .site-nav.open{display:flex}
  .header-inner{flex-wrap:wrap;padding-top:12px;padding-bottom:4px}
  .nav-link{width:100%;padding:10px 0;border-bottom:1px solid var(--line)}
  .nav-search{width:100%;margin-top:10px}
  .nav-search input{width:100%}
  .hero-inner{padding:40px 20px}
  .hero-text h1{font-size:29px}
  .hero-stats{grid-template-columns:1fr 1fr}
  .section{padding:40px 0}
  .section-head h1,.section-head h2{font-size:22px}
  .card-grid{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr 1fr}
  .article-title{font-size:24px}
  .article-content{font-size:16px}
  .footer-inner{grid-template-columns:1fr;gap:22px;padding:34px 20px 22px}
  .cta-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:420px){
  .hero-stats{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr}
  .post-thumb{height:150px}
}