:root{
  --blue:#1B51A5; --blue-dark:#143C7A; --blue-light:#EAF1FB;
  --ink:#101828; --grey:#667085; --line:#E4E7EC; --bg:#FFFFFF; --bg-alt:#F7F9FC;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
a{color:inherit;text-decoration:none}
.btn{display:inline-block;padding:13px 26px;border-radius:6px;font-weight:600;font-size:15px;transition:.2s;border:1.5px solid transparent;cursor:pointer}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark)}
.btn-ghost{border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn.big{padding:16px 34px;font-size:16px}

header{position:sticky;top:0;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:50}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.nav img{height:38px}
.menu{display:flex;gap:30px;font-size:15px;font-weight:500}
.menu a:hover{color:var(--blue)}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-cta .tel{font-size:14px;color:var(--grey)}
.burger{display:none;font-size:22px;background:none;border:0;cursor:pointer}

.crumbs{padding:20px 24px 0;font-size:13px;color:var(--grey)}
.crumbs a:hover{color:var(--blue)}
.crumbs .cur{color:var(--ink);font-weight:600}

.pdetail{padding:34px 0 60px}
.pdetail-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:52px;align-items:start}
.main-img{border:1px solid var(--line);border-radius:12px;background:#FCFCFD;padding:20px}
.thumbs{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.thumbs img{width:76px;height:76px;object-fit:contain;border:1.5px solid var(--line);border-radius:8px;background:#fff;padding:4px;cursor:pointer;transition:.2s}
.thumbs img:hover{border-color:#B9CBE6}
.thumbs img.on{border-color:var(--blue)}

.pinfo .tag{font-size:12px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--blue)}
.pinfo h1{font-size:38px;letter-spacing:-.02em;font-weight:700;margin:8px 0 14px}
.pinfo .lead{font-size:16px;color:var(--grey);margin-bottom:24px}
.quick{list-style:none;margin-bottom:30px}
.quick li{position:relative;padding-left:26px;margin-bottom:11px;font-size:15px}
.quick li:before{content:"";position:absolute;left:2px;top:9px;width:12px;height:7px;border-left:2px solid var(--blue);border-bottom:2px solid var(--blue);transform:rotate(-45deg)}
.muted-note{font-size:13px;color:var(--grey);margin-top:14px}

.pfeat{background:var(--bg-alt);padding:66px 0}
.pfeat h2,.pspec h2{font-size:30px;font-weight:700;letter-spacing:-.01em;margin-bottom:32px}
.pfeat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pfeat-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px 24px}
.pfeat-item h3{font-size:16px;font-weight:600;margin-bottom:8px}
.pfeat-item p{font-size:14px;color:var(--grey)}

.pspec{padding:66px 0}
.spec-wrap{border:1px solid var(--line);border-radius:12px;overflow:hidden}
table.spec{width:100%;border-collapse:collapse;font-size:15px}
table.spec th{text-align:left;font-weight:500;color:var(--grey);background:var(--bg-alt);padding:14px 22px;width:46%;border-bottom:1px solid var(--line)}
table.spec td{padding:14px 22px;border-bottom:1px solid var(--line);font-weight:500}
table.spec tr:last-child th,table.spec tr:last-child td{border-bottom:0}
.spec-note{font-size:13px;color:var(--grey);margin-top:16px}

.cta{background:var(--bg-alt);padding:66px 0}
.cta-box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:52px;display:grid;grid-template-columns:1fr 420px;gap:52px;align-items:center}
.cta-box h2{font-size:30px;font-weight:700;letter-spacing:-.01em;margin-bottom:14px}
.cta-box p{color:var(--grey);font-size:16px;margin-bottom:22px}
.cta-list{list-style:none;font-size:15px;color:var(--grey)}
.cta-list li{padding-left:24px;position:relative;margin-bottom:10px}
.cta-list li:before{content:"";position:absolute;left:0;top:9px;width:12px;height:7px;border-left:2px solid var(--blue);border-bottom:2px solid var(--blue);transform:rotate(-45deg)}
form .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
form input,form select,form textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:6px;font-size:14px;font-family:inherit;margin-bottom:12px;background:#fff}
form input:focus,form select:focus,form textarea:focus{outline:none;border-color:var(--blue)}
form textarea{resize:vertical;min-height:88px}
form button{width:100%;padding:14px;background:var(--blue);color:#fff;border:0;border-radius:6px;font-size:15px;font-weight:600;cursor:pointer;font-family:inherit}
form button:hover{background:var(--blue-dark)}
.form-note{font-size:12px;color:var(--grey);text-align:center;margin-top:10px}

footer{background:#101828;color:#98A2B3;padding:60px 0 30px;font-size:14px;line-height:1.6}
.foot-grid{display:grid;grid-template-columns:minmax(0,1.9fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.35fr);gap:48px;margin-bottom:44px}
footer h4{color:#fff;font-size:12.5px;font-weight:600;margin:0 0 18px;letter-spacing:.08em;text-transform:uppercase}
footer a{display:block;margin-bottom:11px;color:#98A2B3;line-height:1.5;transition:color .18s}
footer a:hover{color:#fff}
footer p{margin:0 0 10px;line-height:1.7}
.foot-bottom{border-top:1px solid #1D2939;padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-size:12.5px;flex-wrap:wrap;gap:12px}
.foot-bottom a{display:inline;margin:0}

@media(max-width:960px){
  .pdetail-grid,.cta-box{grid-template-columns:1fr}
  .pfeat-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .pinfo h1{font-size:30px}
  .pdetail{padding:24px 0 44px}
  .pfeat,.pspec,.cta{padding:46px 0}
}
@media(max-width:640px){
  .menu{display:none}
  .burger{display:block}
  .nav-cta .tel{display:none}
  .pfeat-grid{grid-template-columns:1fr}
  .cta-box{padding:30px}
  form .row{grid-template-columns:1fr}
  .pinfo h1{font-size:26px}
}

.filterbar{display:flex;gap:10px;flex-wrap:wrap;margin:26px 0 8px}
.filterbar button{padding:9px 20px;border-radius:100px;border:1.5px solid var(--line);background:#fff;
  font-size:14px;font-weight:500;font-family:inherit;color:var(--grey);cursor:pointer;transition:.2s}
.filterbar button:hover{border-color:#B9CBE6;color:var(--blue)}
.filterbar button.on{background:var(--blue);border-color:var(--blue);color:#fff}

.gridhead{display:flex;align-items:baseline;gap:12px;margin:40px 0 18px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.gridhead h2{font-size:21px;font-weight:600;letter-spacing:-.01em;margin:0}
.gridhead .n{font-size:13px;color:var(--grey)}

.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.pcard{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;transition:.18s;display:block}
.pcard:hover{border-color:#B9CBE6;box-shadow:0 6px 18px rgba(16,24,40,.07);transform:translateY(-2px)}
.pcard .th{background:#FCFCFD;height:140px;display:flex;align-items:center;justify-content:center;padding:8px;border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.pcard .th img{max-height:124px;width:auto;max-width:100%;transition:transform .3s ease}
.pcard .th .mask{position:absolute;left:0;right:0;bottom:0;top:0;background:rgba(27,81,165,.82);
  display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .2s ease}
.pcard .th .mask span{color:#fff;font-size:12.5px;font-weight:600;border:1px solid rgba(255,255,255,.75);
  padding:6px 14px;border-radius:100px;letter-spacing:.02em}
@media(hover:hover){
  .pcard:hover .th .mask{opacity:1}
  .pcard:hover .th img{transform:scale(1.06)}
}
.pcard .th img{max-height:124px;width:auto;max-width:100%}
.pcard .bd{padding:13px 14px 15px}
.pcard .bd .tag{font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:var(--blue);font-weight:600}
.pcard .bd h3{font-size:15px;font-weight:600;margin:3px 0 5px}
.pcard .bd p{font-size:12.5px;color:var(--grey);line-height:1.45}
@media(max-width:1000px){.pgrid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){.pgrid{grid-template-columns:repeat(2,1fr)}.pcard .th{height:118px}.pcard .th img{max-height:102px}}

.form-msg{margin-top:14px;padding:12px 14px;border-radius:8px;font-size:14px;line-height:1.5}
.form-msg.ok{background:#E7F6EF;border:1px solid #A6E0C6;color:#0F6E56}
.form-msg.err{background:#FDECEC;border:1px solid #F5B9B9;color:#A32D2D}
button[type="submit"]:disabled{opacity:.6;cursor:default}

html{scroll-behavior:smooth}
/* 固定页头高 72px，锚点跳转时给目标留出偏移，避免被页头压住 */
.pgroup,.gridhead,section[id],div[id]{scroll-margin-top:96px}
@media(max-width:640px){.pgroup,.gridhead,section[id],div[id]{scroll-margin-top:86px}}
.videobox{margin:0 auto;max-width:900px}
.videobox video{width:100%;height:auto;display:block;border-radius:12px;background:#000;
  border:1px solid var(--line);box-shadow:0 8px 28px rgba(16,24,40,.10)}
.videobox .cap{margin-top:14px;font-size:14px;color:var(--grey);text-align:center}
.videobox .cap strong{color:var(--ink)}
@media(max-width:640px){.videobox video{border-radius:8px}}