/* 闪连 - 全站样式表 */
:root{
  --brand:#1a6cff;
  --brand-deep:#0b3ea8;
  --accent:#00c896;
  --ink:#0f172a;
  --muted:#5b6b84;
  --bg:#ffffff;
  --soft:#f4f7ff;
  --line:#e3e9f6;
  --radius:14px;
  --shadow:0 10px 30px rgba(15,23,42,.08);
  --max:1160px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.3;margin:0 0 .5em}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.2em}

.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.center{text-align:center}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:var(--ink);letter-spacing:.5px}
.logo:hover{text-decoration:none}
.logo-mark{
  width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;font-size:16px;font-weight:800;
}
.crumbs{max-width:1120px;margin:18px auto 0;padding:0 20px;font-size:14px;color:#8a93a6}
.crumbs a{color:#1257d6}
.crumbs strong{color:#1c2733}
.logo-img{width:32px;height:32px;object-fit:contain;display:block}
.footer-logo .logo-img{width:28px;height:28px}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-menu a{color:var(--ink);font-size:15px;font-weight:600}
.nav-menu a:hover{color:var(--brand);text-decoration:none}
.nav-menu a.active{color:var(--brand)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:10px;padding:8px 12px;cursor:pointer;font-size:14px;color:var(--ink)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;transition:.2s;white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#fff;box-shadow:0 8px 20px rgba(26,108,255,.28)}
.btn-primary:hover{box-shadow:0 12px 26px rgba(26,108,255,.36)}
.btn-light{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-outline:hover{background:rgba(255,255,255,.12)}
.btn-sm{padding:9px 18px;font-size:14px}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;padding:88px 0 76px;
  background:linear-gradient(135deg,#071a3d 0%,#0b3ea8 55%,#1257d6 100%);
}
.hero::after{
  content:"";position:absolute;width:620px;height:620px;right:-180px;top:-220px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,200,150,.35),transparent 65%);
}
.hero-inner{position:relative;z-index:1;max-width:760px}
.badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);font-size:13px;font-weight:600;margin-bottom:20px;
}
.hero h1{font-size:clamp(28px,4vw,44px);font-weight:800;letter-spacing:.5px}
.hero .lead{font-size:17px;color:rgba(255,255,255,.86);max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 30px}
.hero-stats{display:flex;flex-wrap:wrap;gap:38px;padding-top:26px;border-top:1px solid rgba(255,255,255,.18)}
.hero-stats div strong{display:block;font-size:26px;font-weight:800;letter-spacing:.5px}
.hero-stats div span{font-size:13px;color:rgba(255,255,255,.75)}
.page-hero{padding:64px 0 54px}
.page-hero .hero-inner{max-width:820px}

/* ---------- Section ---------- */
.section{padding:76px 0}
.section.soft{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:820px;margin-bottom:40px}
.section-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:800}
.section-head .lead{color:var(--muted);font-size:16px;margin-bottom:0}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--brand);
  text-transform:uppercase;margin-bottom:12px;
}

/* ---------- Cards ---------- */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(340px,1fr))}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);transition:.2s;
}
.card:hover{transform:translateY(-3px);box-shadow:0 16px 36px rgba(15,23,42,.12)}
.card h3{font-size:18px;margin-bottom:8px}
.card p{margin:0;color:var(--muted);font-size:15px}
.card-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:linear-gradient(135deg,rgba(26,108,255,.12),rgba(0,200,150,.16));color:var(--brand);font-weight:800;
}
.icon-list{list-style:none;padding:0;margin:0}
.icon-list li{position:relative;padding-left:26px;margin-bottom:8px;color:var(--muted);font-size:15px}
.icon-list li::before{
  content:"";position:absolute;left:0;top:10px;width:9px;height:9px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--accent));
}

/* ---------- Table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;min-width:720px}
thead th{background:var(--soft);text-align:left;padding:15px 18px;font-size:14px;font-weight:800;white-space:nowrap}
thead th.hl{background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#fff}
tbody td{padding:15px 18px;border-top:1px solid var(--line);font-size:15px;vertical-align:top}
tbody tr:hover{background:#fafcff}
tbody td.hl{background:rgba(26,108,255,.06);font-weight:700}
tbody th{text-align:left;padding:15px 18px;border-top:1px solid var(--line);font-size:15px;font-weight:700;white-space:nowrap}

/* ---------- Testimonials ---------- */
.quote{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.quote .stars{color:#ffb020;font-size:14px;letter-spacing:2px;margin-bottom:10px}
.quote p{font-size:15px;color:var(--ink)}
.quote .who{display:flex;align-items:center;gap:12px;margin-top:16px;padding-top:16px;border-top:1px solid var(--line)}
.avatar{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--soft);color:var(--brand);font-weight:800}
.who b{display:block;font-size:14px}
.who span{font-size:13px;color:var(--muted)}

/* ---------- Certs ---------- */
.certs{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-top:26px}
.cert{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}
.cert b{display:block;font-size:15px}
.cert span{font-size:13px;color:var(--muted)}
.cert .tick{color:var(--accent);font-weight:800;font-size:16px}

/* ---------- FAQ ---------- */
.faq{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.faq details{border-bottom:1px solid var(--line)}
.faq details:last-child{border-bottom:none}
.faq summary{
  cursor:pointer;list-style:none;padding:20px 24px;font-size:16px;font-weight:700;
  display:flex;justify-content:space-between;align-items:center;gap:16px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brand);font-size:22px;font-weight:700;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details[open] summary{background:var(--soft)}
.faq .answer{padding:0 24px 22px;color:var(--muted);font-size:15px;margin:0}

/* ---------- Platform tabs ---------- */
.tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.tab{
  padding:10px 20px;border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:15px;font-weight:700;cursor:pointer;color:var(--ink);transition:.2s;
}
.tab:hover{border-color:var(--brand);color:var(--brand)}
.tab[aria-selected="true"]{background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#fff;border-color:transparent}
.panel{display:none}
.panel.active{display:block}
.dl-card{
  display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);
}
.dl-card h3{font-size:20px;margin-bottom:6px}
.dl-meta{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 0;padding:0;list-style:none}
.dl-meta li{background:var(--soft);border-radius:8px;padding:5px 12px;font-size:13px;color:var(--muted);font-weight:600}

/* ---------- Steps ---------- */
.steps{list-style:none;counter-reset:s;padding:0;margin:0}
.steps li{
  counter-increment:s;position:relative;padding:0 0 26px 62px;border-left:2px solid var(--line);margin-left:19px;
}
.steps li:last-child{border-left-color:transparent;padding-bottom:0}
.steps li::before{
  content:counter(s);position:absolute;left:-20px;top:0;width:38px;height:38px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#fff;display:grid;place-items:center;font-weight:800;
}
.steps li b{display:block;font-size:16px;margin-bottom:4px}
.steps li p{margin:0;color:var(--muted);font-size:15px}

/* ---------- News ---------- */
.news-layout{display:grid;grid-template-columns:1fr 320px;gap:36px;align-items:start}
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.filter{
  padding:8px 16px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:14px;
  font-weight:600;cursor:pointer;color:var(--ink);
}
.filter:hover{border-color:var(--brand);color:var(--brand)}
.filter[aria-pressed="true"]{background:var(--brand);color:#fff;border-color:var(--brand)}
.post{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow);margin-bottom:20px;
}
.post h3{font-size:19px;margin-bottom:10px}
.post h3 a{color:var(--ink)}
.post h3 a:hover{color:var(--brand);text-decoration:none}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--muted);margin-bottom:12px}
.tag{background:rgba(26,108,255,.1);color:var(--brand);border-radius:6px;padding:3px 10px;font-weight:700;font-size:12px}
.post p{color:var(--muted);font-size:15px;margin-bottom:14px}
.post-more{
  background:none;border:1px solid var(--line);border-radius:999px;padding:7px 16px;font-size:14px;
  font-weight:700;color:var(--brand);cursor:pointer;
}
.post-more:hover{border-color:var(--brand)}
.post-detail{display:none;margin-top:14px;padding-top:14px;border-top:1px dashed var(--line)}
.post-detail.open{display:block}
.post-detail ul{color:var(--muted);font-size:15px}

.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);margin-bottom:22px}
.side-card h3{font-size:16px;margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.side-list{list-style:none;padding:0;margin:0;counter-reset:r}
.side-list li{counter-increment:r;display:flex;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px}
.side-list li:last-child{border-bottom:none}
.side-list li::before{content:counter(r);color:var(--brand);font-weight:800;min-width:18px}
.side-list a{color:var(--ink);font-weight:600;line-height:1.5}
.side-list a:hover{color:var(--brand);text-decoration:none}
.side-list small{display:block;color:var(--muted);font-weight:400}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-cloud a{background:var(--soft);border-radius:8px;padding:6px 12px;font-size:13px;color:var(--muted);font-weight:600}
.tag-cloud a:hover{background:var(--brand);color:#fff;text-decoration:none}
.subscribe{display:flex;gap:8px;margin-top:12px}
.subscribe input{flex:1;min-width:0;border:1px solid var(--line);border-radius:10px;padding:10px 14px;font-size:14px;font-family:var(--font)}
.subscribe button{border:none;background:var(--brand);color:#fff;border-radius:10px;padding:0 18px;font-weight:700;cursor:pointer}
.side-cta{
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#fff;border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);
}
.side-cta h3{color:#fff;border-bottom-color:rgba(255,255,255,.25)}
.side-cta p{color:rgba(255,255,255,.85);font-size:14px}

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(135deg,#071a3d,#0b3ea8);color:#fff;padding:66px 0;text-align:center;
}
.cta-band h2{font-size:clamp(22px,3vw,32px);font-weight:800}
.cta-band p{color:rgba(255,255,255,.82);max-width:640px;margin:0 auto 26px}

/* ---------- Footer ---------- */
.site-footer{background:#06152f;color:rgba(255,255,255,.72);padding:56px 0 26px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:32px;margin-bottom:34px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:14px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:9px}
.site-footer a{color:rgba(255,255,255,.72)}
.site-footer a:hover{color:#fff}
.footer-logo{color:#fff;font-weight:800;font-size:19px;display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .news-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .nav-toggle{display:block}
  .nav-menu{
    display:none;position:absolute;left:0;right:0;top:68px;background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;align-items:flex-start;gap:0;padding:12px 20px 20px;
  }
  .nav-menu.open{display:flex}
  .nav-menu a{padding:12px 0;width:100%;border-bottom:1px solid var(--line)}
  .nav-menu .btn{margin-top:14px;width:100%}
  .hero{padding:64px 0 56px}
  .hero-stats{gap:24px}
  .section{padding:56px 0}
  .dl-card{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}