/* ============================================================
   北京软能通科技 新版官网 — 硬科技视觉系统
   design tokens: ink navy + electric cyan
   ============================================================ */
:root{
  --ink-900:#060B17; --ink-800:#0A1428; --ink-700:#101D38; --ink-600:#16264A;
  --surface:#F4F7FB; --surface-2:#EAEFF6; --line:#DDE5EF;
  --cyan:#00B4FF; --cyan-l:#38D6FF; --teal:#2FE6C8; --white:#fff; --text:#1B2A44; --text-l:#5A6B87;
  --grad:linear-gradient(120deg,#00B4FF,#2FE6C8);
  --shadow:0 8px 28px rgba(6,11,23,.12);
  --r:10px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",Helvetica,Arial,sans-serif;color:var(--text);background:var(--surface);font-size:17px;line-height:1.75}
img{max-width:100%;display:block}
a{color:var(--cyan);text-decoration:none}
a:hover{color:var(--ink-800)}
ul{list-style:none}
button{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- Header ---------- */
.top-strip{background:#fff;color:var(--text-l);font-size:13px;border-bottom:1px solid var(--line)}
.top-strip-in{display:flex;justify-content:space-between;padding:7px 20px}
.ts-right{color:var(--cyan)}
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);box-shadow:0 2px 10px rgba(6,11,23,.05)}
.header-main{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;gap:16px}
.brand img{height:44px;width:auto}
.nav ul{display:flex;gap:4px;align-items:center}
.nav>ul>li{position:relative}
.nav-top{display:block;padding:12px 14px;color:var(--ink-800);font-size:16px;font-weight:600;transition:.2s}
.nav-top:hover{color:var(--cyan)}
.nav-top.active{color:var(--cyan);position:relative}
.nav-top.active::after{content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;background:var(--grad)}
.has-sub .sub{position:absolute;top:100%;left:0;min-width:200px;background:#fff;border:1px solid var(--line);border-top:2px solid var(--cyan);display:none;padding:6px 0;box-shadow:var(--shadow)}
.has-sub:hover .sub{display:block}
.sub a{display:block;padding:9px 18px;color:var(--text);font-size:14px;white-space:nowrap}
.sub a:hover{color:var(--cyan);background:rgba(0,180,255,.06)}
.nav-toggle{display:none;background:none;border:none;width:42px;height:42px;flex-direction:column;justify-content:center;gap:6px;cursor:pointer}
.nav-toggle span{height:2px;background:var(--ink-800);width:26px;margin:0 auto;transition:.3s}
.nav.open{display:block}

/* ---------- Hero ---------- */
.hero{position:relative;height:min(640px,78vh);min-height:420px;overflow:hidden;background:var(--ink-900)}
.slides,.slide{position:absolute;inset:0}
.slide{opacity:0;transition:opacity .8s;background-size:cover;background-position:center}
.slide.active{opacity:1}
.slide::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,11,23,.82) 0%,rgba(6,11,23,.45) 55%,rgba(6,11,23,.25) 100%)}
.slide-cap{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:center;color:#fff;max-width:1200px}
.slide-cap h2{font-size:clamp(30px,5vw,56px);font-weight:800;letter-spacing:1px;margin-bottom:16px;line-height:1.25}
.slide-cap p{font-size:clamp(15px,2vw,20px);color:var(--cyan-l);font-weight:600;letter-spacing:2px}
.slide-cap::before{content:"";width:64px;height:4px;background:var(--grad);margin-bottom:22px;border-radius:2px}
.hero-nav .arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;background:rgba(6,11,23,.35);border:1px solid rgba(0,180,255,.4);color:#fff;font-size:34px;width:52px;height:52px;border-radius:50%;cursor:pointer;line-height:1;transition:.2s}
.hero-nav .arrow:hover{background:rgba(0,180,255,.25)}
.hero-nav .prev{left:18px}.hero-nav .next{right:18px}
.dots{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);z-index:5;display:flex;gap:10px}
.dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.4);cursor:pointer;transition:.3s}
.dot.on{background:var(--cyan-l);box-shadow:0 0 10px var(--cyan-l)}

/* ---------- Sections ---------- */
.sec{padding:76px 0}
.sec-head{margin-bottom:44px;text-align:center}
.eyebrow{font-size:13px;letter-spacing:6px;color:var(--cyan);font-weight:700;text-transform:uppercase;margin-bottom:10px}
.sec-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;color:var(--ink-900)}
.sec-head.light h2{color:#fff}
.line{display:inline-block;width:60px;height:3px;background:var(--grad);border-radius:2px;margin-top:16px}
.sec-more{text-align:center;margin-top:40px}
.dark-sec{background-size:cover;background-position:center;background-color:var(--ink-800);position:relative}
.dark-sec::before{content:"";position:absolute;inset:0;background:rgba(10,20,40,.86)}
.dark-sec>.container{position:relative;z-index:2}

/* ---------- Buttons ---------- */
.btn{display:inline-block;background:var(--grad);color:#04121F;font-weight:700;padding:12px 30px;border-radius:var(--r);transition:.25s;border:none;cursor:pointer;font-size:15px}
.btn:hover{box-shadow:0 6px 22px rgba(0,180,255,.5);color:#04121F;transform:translateY(-1px)}
.btn.ghost{background:transparent;border:1.5px solid var(--cyan);color:var(--cyan-l)}
.btn.ghost:hover{background:rgba(0,180,255,.12)}
.btn.ghost.dark{color:var(--ink-800);border-color:var(--ink-800)}
.btn.ghost.dark:hover{background:rgba(10,20,40,.06)}
.btn.small{padding:7px 18px;font-size:13px}

/* ---------- About ---------- */
.about-sec{background:var(--surface)}
.about-grid{display:grid;grid-template-columns:1fr;gap:34px;align-items:center}
.about-img{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}
.about-img img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.about-txt h3{font-size:clamp(22px,2.6vw,30px);font-weight:800;color:var(--ink-900);margin-bottom:18px}
.about-txt p{color:var(--text-l);margin-bottom:14px;text-align:justify}
.about-txt .btn{margin-top:10px}

/* ---------- Stats ---------- */
.stats-band{background:linear-gradient(120deg,var(--ink-900),var(--ink-700));padding:52px 0}
.stats-band .container{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;text-align:center}
.stat b{display:block;font-size:clamp(34px,4.6vw,54px);font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.2}
.stat span{color:#8FA3C0;font-size:15px;letter-spacing:2px}

/* ---------- Product grid ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.prod-card{background:rgba(255,255,255,.04);border:1px solid rgba(0,180,255,.18);border-radius:var(--r);overflow:hidden;transition:.25s;display:block}
.prod-card:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:0 10px 34px rgba(0,180,255,.28)}
.pc-img{overflow:hidden;aspect-ratio:4/3;background:var(--ink-900)}
.pc-img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.prod-card:hover .pc-img img{transform:scale(1.05)}
.pc-body{padding:16px 18px}
.pc-body h3{color:#1B2A44;font-size:16px;font-weight:700;line-height:1.4}
.pc-body p{color:#7E93B5;font-size:13px;margin-top:6px}
.dark-sec .pc-body h3{color:#ffffff}

/* ---------- Case ---------- */
.case-sec{background:var(--surface)}
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.case-card{position:relative;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);display:block}
.case-card img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:.4s}
.case-card h3{position:absolute;left:0;right:0;bottom:0;padding:34px 16px 14px;background:linear-gradient(transparent,rgba(255,255,255,.97));color:#1B2A44;font-size:15px;font-weight:700}
.case-card:hover img{transform:scale(1.06)}

/* ---------- News ---------- */
.news-sec{background-size:cover;background-position:center;background-color:var(--ink-800)}
.news-sec::before{content:"";position:absolute;inset:0;background:rgba(10,20,40,.9)}
.news-sec>.container{position:relative;z-index:2}
.news-list{display:grid;gap:18px}
.news-item{display:grid;grid-template-columns:130px 1fr;gap:18px;background:rgba(255,255,255,.04);border:1px solid rgba(0,180,255,.16);border-radius:var(--r);padding:14px;transition:.25s;align-items:center}
.news-item:hover{border-color:var(--cyan);background:rgba(0,180,255,.08)}
.news-item img{width:130px;height:90px;object-fit:cover;border-radius:6px}
.news-card .news-item{background:#F5F9FF;border:1px solid var(--line)}
.news-card .news-item:hover{background:rgba(0,180,255,.06)}
.news-card .news-item h3{color:#1B2A44}
.news-card .ni-sum{color:var(--text-l)}
.news-card .ni-meta{color:#0E7DAF}
.ni-body h3{color:#fff;font-size:16px;font-weight:700;line-height:1.5}
.ni-sum{color:#93A6C6;font-size:13px;margin-top:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ni-meta{color:var(--cyan-l);font-size:12px;margin-top:8px}

/* ---------- Page banner ---------- */
.page-banner{position:relative;height:200px;overflow:hidden;background:var(--ink-800)}
.pb-bg{position:absolute;inset:0;background-size:cover;background-position:center}
.pb-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,11,23,.88),rgba(6,11,23,.55))}
.pb-inner{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:center;color:#fff}
.pb-inner h1{font-size:clamp(24px,3vw,34px);font-weight:800}
.crumbs{color:#8FA3C0;font-size:13px;margin-top:10px}
.crumbs span{margin:0 6px}
.crumbs a{color:#8FA3C0}
.crumbs a:hover{color:var(--cyan-l)}

/* ---------- Page body ---------- */
.page-body{padding:48px 0 70px}
.page-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:clamp(20px,4vw,44px);box-shadow:var(--shadow)}
.empty-tip{color:var(--text-l);padding:40px 0;text-align:center}
.cat-title{font-size:20px;font-weight:800;color:var(--ink-900);margin:34px 0 20px;padding-left:14px;border-left:4px solid var(--cyan)}
.cat-title:first-child{margin-top:0}

/* ---------- Article ---------- */
.article h1{font-size:clamp(22px,2.8vw,30px);color:var(--ink-900);margin-bottom:18px;line-height:1.4}
.article p{color:var(--text);margin-bottom:16px;text-align:justify;line-height:2.0;font-size:17px}
.article.article-center p{text-align:center}
.article h2,.article h3{color:var(--ink-900);margin:26px 0 12px;line-height:1.5}
.article h2{font-size:20px;border-left:4px solid var(--cyan);padding-left:12px}
.article a{word-break:break-all}
.article-img{text-align:center}
.article-img img{border-radius:10px;max-height:520px;margin:0 auto}
.article .blk{margin:16px 0}
.article .blk ul,.article .blk ol{margin:10px 0 14px 0;padding-left:24px;list-style:inside}
.article .blk li{margin:8px 0;line-height:2.0}
.article .blk pre{background:var(--ink-900);color:#DCE6F4;padding:16px;border-radius:10px;overflow-x:auto;font-size:14px;line-height:1.7;border:1px solid rgba(0,180,255,.25)}
.article .blk code{font-family:Consolas,Monaco,"Courier New",monospace}
.art-title{font-size:clamp(22px,2.8vw,30px);font-weight:800;color:var(--ink-900);line-height:1.45}
.art-meta{color:#8FA0BC;font-size:13px;margin:14px 0 24px;padding-bottom:16px;border-bottom:1px dashed var(--line)}

/* ---------- Product detail ---------- */
.prod-detail{display:grid;grid-template-columns:1fr;gap:30px}
.pd-img{width:100%;max-height:460px;object-fit:cover;border-radius:12px;border:1px solid var(--line)}
.pd-title{font-size:clamp(22px,2.8vw,30px);font-weight:800;color:var(--ink-900);margin-bottom:10px}
.order-row{margin-top:26px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.order-note{color:#8FA0BC;font-size:13px}

/* ---------- Case detail ---------- */
.cd-title{font-size:clamp(22px,2.8vw,30px);font-weight:800;color:var(--ink-900);margin-bottom:22px}
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-bottom:26px}
.g-item{border-radius:10px;overflow:hidden;border:1px solid var(--line);cursor:zoom-in}
.g-item img{width:100%;aspect-ratio:4/3;object-fit:cover}
.pn-row{display:flex;justify-content:space-between;gap:12px;margin-top:30px;padding-top:18px;border-top:1px dashed var(--line);flex-wrap:wrap}
.pn{color:var(--text-l);font-size:14px;max-width:46%}
.pn:hover{color:var(--cyan)}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr;gap:16px;margin-bottom:34px}
.c-info{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px;overflow-wrap:break-word;word-break:break-all}
.c-info h4{color:var(--cyan);font-size:14px;letter-spacing:2px;margin-bottom:8px}
.c-info p{font-size:16px;color:var(--text);font-weight:600}
.c-wx{display:flex;align-items:center;gap:14px}
.c-qr{width:76px;height:76px;object-fit:cover;border-radius:8px;flex:none}
.c-wx-txt{min-width:0}
.c-wx-txt h4{color:var(--cyan);font-size:14px;letter-spacing:2px;margin-bottom:6px}
.c-wx-txt p{font-size:16px;color:var(--text);font-weight:600}
.plat-grid{display:grid;grid-template-columns:1fr;gap:20px}
.plat-card{display:grid;grid-template-columns:120px 1fr;gap:18px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.plat-card img{width:120px;height:120px;object-fit:cover;border-radius:8px}
.plat-card h4{color:var(--ink-900);font-size:17px;margin-bottom:6px}
.plat-card p{color:var(--text-l);font-size:13px;margin-bottom:10px}

/* ---------- Form ---------- */
.form-wrap{max-width:820px}
.form-tip{color:var(--text-l);margin-bottom:24px}
.form-row{display:grid;grid-template-columns:110px 1fr;gap:12px;margin-bottom:16px;align-items:center}
.form-row.full{grid-template-columns:1fr}
.form-row label{color:var(--ink-800);font-weight:600;font-size:15px}
.form-row input,.form-row textarea{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:8px;font-size:16px;font-family:inherit;background:#fff;transition:.2s}
.form-row input:focus,.form-row textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(0,180,255,.15)}
.form-row textarea{resize:vertical}
.form-note{font-size:12px;color:#8FA0BC;margin-left:16px}

/* ---------- Download ---------- */
.dl-wrap h3{font-size:20px;color:var(--ink-900);margin:26px 0 16px;padding-left:12px;border-left:4px solid var(--cyan)}
.dl-wrap h3:first-child{margin-top:0}
.dl-list{display:grid;gap:14px}
.dl-item{display:flex;justify-content:space-between;align-items:center;gap:16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;flex-wrap:wrap;min-width:0}
.dl-item>*{min-width:0}
.dl-item .dl-txt{flex:1 1 240px}
.dl-item h4{color:var(--ink-900);font-size:16px;margin-bottom:6px}
.dl-url{font-size:13px;color:var(--text-l);word-break:break-all;overflow-wrap:anywhere}
.dl-url a{color:var(--cyan);word-break:break-all}

/* ---------- Footer ---------- */
.footer{background:var(--ink-900);color:#9FB0C8;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:26px;padding:54px 0 38px}
.f-col h4{color:#fff;font-size:16px;margin-bottom:16px;font-weight:700;position:relative;padding-bottom:10px}
.f-col h4::after{content:"";position:absolute;left:0;bottom:0;width:34px;height:2px;background:var(--grad)}
.f-col ul li{margin-bottom:9px}
.f-col ul a{color:#9FB0C8;font-size:14px}
.f-col ul a:hover{color:var(--cyan-l)}
.f-logo{height:40px;width:auto;margin-bottom:14px}
.f-about{font-size:13px;line-height:1.9;color:#7E93B5}
.f-contact li{font-size:14px;margin-bottom:9px}
.f-qr img{width:110px;height:110px;border:1px solid rgba(255,255,255,.15);border-radius:8px}
.f-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;font-size:13px}
.f-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.f-bottom a{color:#9FB0C8}
.f-bottom a:hover{color:var(--cyan-l)}

/* ---------- Float ---------- */
.qq-float{position:fixed;right:18px;bottom:96px;z-index:90;width:52px;height:52px;border-radius:50%;background:linear-gradient(135deg,#00B4FF,#2FE6C8);color:#04121F;font-size:12px;font-weight:800;display:flex;align-items:center;justify-content:center;text-align:center;box-shadow:0 6px 20px rgba(0,180,255,.5);line-height:1.25}
.qq-float:hover{transform:scale(1.06)}
.top-btn{position:fixed;right:18px;bottom:28px;z-index:90;width:44px;height:44px;border-radius:10px;background:var(--ink-800);border:1px solid rgba(0,180,255,.4);color:var(--cyan-l);font-size:18px;cursor:pointer;display:none}
.top-btn.show{display:block}
.top-btn:hover{background:var(--ink-700)}

/* ---------- Pagination ---------- */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:34px;flex-wrap:wrap}
.pg{min-width:38px;height:38px;padding:0 10px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:8px;color:var(--text);font-size:14px;background:#fff}
.pg.on{background:var(--grad);border-color:transparent;color:#04121F;font-weight:700}
.pg.off{color:#B9C4D6;cursor:default}
.pg:hover:not(.on):not(.off){border-color:var(--cyan);color:var(--cyan)}

/* ---------- Lightbox ---------- */
.lightbox{position:fixed;inset:0;z-index:200;background:rgba(6,11,23,.92);display:none;align-items:center;justify-content:center;padding:20px}
.lightbox.open{display:flex}
.lightbox img{max-width:94vw;max-height:88vh;border-radius:8px}
.lightbox .lb-close{position:absolute;top:18px;right:24px;color:#fff;font-size:34px;cursor:pointer;background:none;border:none}

/* ---------- Responsive ---------- */
@media(min-width:768px){
  .about-grid{grid-template-columns:5fr 6fr}
  .prod-grid{grid-template-columns:repeat(3,1fr)}
  .case-grid{grid-template-columns:repeat(3,1fr)}
  .news-list{grid-template-columns:1fr 1fr}
  .plat-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr 1fr .8fr;gap:30px}
  .prod-detail{grid-template-columns:5fr 7fr}
}
@media(max-width:767px){
  .nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line)}
  .nav ul{flex-direction:column;align-items:stretch;padding:8px 0}
  .nav-top{padding:12px 24px}
  .has-sub .sub{position:static;display:block;border:none;padding:0;background:var(--surface-2)}
  .sub a{padding:10px 36px}
  .nav-toggle{display:flex}
  .news-item{grid-template-columns:96px 1fr}
  .news-item img{width:96px;height:72px}
  .plat-card{grid-template-columns:86px 1fr}
  .plat-card img{width:86px;height:86px}
  .form-row{grid-template-columns:1fr}
  .dl-item{flex-direction:column;align-items:flex-start}
  .stats-band .container{grid-template-columns:repeat(3,1fr)}
  .f-bottom .container{justify-content:center}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
}