/* ============ 设计 token（与 index.html 一致） ============ */
:root{
  --brand:#0052d9; --brand-2:#3d7bff; --brand-d:#0047c4; --brand-dd:#003aa8;
  --brand-soft:#E8EFFF; --brand-line:#C9D8F8;
  --bg:#F5FAFF; --bg-2:#EAF4FF; --white:#fff;
  --ink:#16283A; --ink-2:#46586A; --ink-3:#7C8DA0; --line:#E4EEF8;
  --ok:#12B76A;
  --r:16px; --r-sm:12px;
  --shadow:0 6px 24px rgba(0,60,150,.08);
  --shadow-lg:0 18px 48px rgba(0,60,150,.14);
  --ease:cubic-bezier(.22,1,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.wrap{width:min(1320px,92%);margin:0 auto}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:999px;font-size:15px;font-weight:600;transition:all .25s var(--ease);white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 8px 22px rgba(0,82,217,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,82,217,.42)}
.btn-light{background:#fff;color:var(--brand-dd)}
/* ============ 顶部导航（与 index.html 一致） ============ */
.header{position:fixed;top:0;left:0;right:0;z-index:100;transition:all .3s var(--ease);background:rgba(255,255,255,.86);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line)}
.nav{display:flex;align-items:center;gap:28px;height:68px;width:100%;max-width:none;padding:0 36px;box-sizing:border-box;margin:0}
@media (max-width:768px){.nav{padding:0 18px;gap:16px}}
.logo{display:flex;align-items:center;gap:10px}
.logo-img{height:34px;width:auto;display:block}
.nav-menu{display:flex;gap:6px;margin-left:8px;flex:1}
.nav-item{position:relative}
.nav-item>a{display:flex;align-items:center;gap:5px;padding:10px 14px;border-radius:10px;font-size:15px;font-weight:500;color:var(--ink-2);transition:color .2s}
.nav-item>a:hover,.nav-item.open>a{color:var(--brand)}
.nav-item>a.on{color:var(--brand);font-weight:600}
.nav-item .caret{width:9px;height:9px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .2s}
.drop{position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%) translateY(8px);min-width:200px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-lg);padding:8px;opacity:0;visibility:hidden;transition:all .25s var(--ease)}
.nav-item:hover .drop,.nav-item.open .drop{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.drop a{display:flex;align-items:center;gap:11px;padding:11px 14px;border-radius:10px;font-size:14.5px}
.drop a b{font-weight:600;color:var(--ink)}
.drop a .dico{width:18px;height:18px;color:var(--brand);flex-shrink:0}
.drop a:hover{background:var(--brand-soft)}
.nav-actions{display:flex;align-items:center;gap:14px}
.nav-login{font-size:15px;color:var(--ink-2);font-weight:500;padding:8px 14px}
.nav-login:hover{color:var(--brand)}
.nav-cta{padding:10px 22px;font-size:14.5px}
.burger{display:none;width:42px;height:42px;border-radius:10px;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.burger span{width:20px;height:2px;background:var(--ink);border-radius:2px;transition:all .3s}
/* ============ 页面头部横幅 ============ */
.page-head{position:relative;padding:104px 0 40px;overflow:hidden;background:linear-gradient(180deg,#DCE7FF 0%,#E7F0FF 60%,var(--bg) 100%)}
.page-head .hero-dots{position:absolute;inset:0;background-image:radial-gradient(circle,#C6D6F5 1.2px,transparent 1.6px);background-size:26px 26px;opacity:.5;mask-image:linear-gradient(180deg,#000,transparent 75%)}
.page-head .glow{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5}
.page-head .glow-a{width:380px;height:380px;background:#C7DCFF;top:-140px;right:-60px}
.page-head .glow-b{width:300px;height:300px;background:#E6EEFF;bottom:-100px;left:-80px;opacity:.6}
.page-head .wrap{position:relative;z-index:1}
.breadcrumb{font-size:13.5px;color:var(--ink-3);margin-bottom:10px}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.page-head h1{font-size:36px;line-height:1.4;font-weight:800;letter-spacing:.01em;margin-bottom:12px}
.page-head h1 .hl{background:linear-gradient(120deg,var(--brand),#6f9bff);-webkit-background-clip:text;background-clip:text;color:transparent}
.page-head p{font-size:15.5px;color:var(--ink-2);max-width:620px}
/* ============ 公司概览 ============ */
.sec{padding:56px 0}
.sec-alt{background:#fff}
.sec-title{text-align:center;margin-bottom:40px}
.sec-title .kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--brand);margin-bottom:12px}
.sec-title .kicker::before,.sec-title .kicker::after{content:"";width:22px;height:2px;background:linear-gradient(90deg,transparent,var(--brand-2));border-radius:2px}
.sec-title .kicker::after{background:linear-gradient(90deg,var(--brand-2),transparent)}
.sec-title h2{font-size:32px;font-weight:800;color:var(--ink);line-height:1.3}
.sec-title .sub{font-size:15px;color:var(--ink-3);margin-top:10px}
.overview{display:grid;grid-template-columns:480px minmax(0,1fr);gap:44px;align-items:center}
.ov-img{position:relative;border-radius:22px;overflow:hidden;box-shadow:var(--shadow-lg);align-self:stretch;min-height:480px}
.ov-img img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease)}
.ov-img:hover img{transform:scale(1.04)}
.ov-img .ov-tag{position:absolute;left:18px;bottom:18px;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-radius:12px;padding:10px 16px;font-size:13px;font-weight:600;color:var(--ink);display:flex;align-items:center;gap:8px;box-shadow:var(--shadow)}
.ov-img .ov-tag i{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 4px rgba(18,183,106,.18)}
.ov-body h2{font-size:30px;font-weight:800;color:var(--ink);line-height:1.35;margin-bottom:6px}
.ov-body h2 .en{display:block;font-size:14px;font-weight:600;letter-spacing:.34em;color:var(--brand);margin-bottom:10px}
.ov-body p.lead{font-size:15.5px;line-height:2;color:var(--ink-2);margin-bottom:8px}
.ov-body .ov-div{width:52px;height:4px;border-radius:2px;background:linear-gradient(90deg,var(--brand),var(--brand-2));margin:18px 0 22px}
.ov-nums{display:flex;gap:0;background:var(--brand-soft);border:1px solid var(--brand-line);border-radius:18px;padding:22px 12px;margin-top:26px}
.ov-num{flex:1;text-align:center;border-right:1px solid var(--brand-line);padding:4px 10px}
.ov-num:last-child{border-right:none}
.ov-num b{display:block;font-size:32px;font-weight:800;line-height:1.2;background:linear-gradient(120deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.ov-num span{font-size:13px;color:var(--ink-2)}
/* ============ 资质证书 ============ */
.certs{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.cert{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px 16px 22px;text-align:center;transition:all .28s var(--ease)}
.cert:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--brand-line)}
.cert .cimg{width:96px;height:96px;border-radius:50%;background:var(--bg-2);border:1px solid var(--brand-line);margin:0 auto 18px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.cert .cimg img{width:58px;height:58px;object-fit:contain}
.cert p{font-size:14.5px;font-weight:600;color:var(--ink);line-height:1.5}
/* ============ 客户 Logo ============ */
.clients{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.client{background:#fff;border:1px solid var(--line);border-radius:14px;height:88px;display:flex;align-items:center;justify-content:center;padding:18px;transition:all .25s var(--ease);filter:grayscale(1);opacity:.85}
.client img{max-height:52px;max-width:86%;object-fit:contain}
.client:hover{filter:grayscale(0);opacity:1;border-color:var(--brand-line);box-shadow:var(--shadow);transform:translateY(-3px)}
/* ============ 联系我们 ============ */
.contact{display:grid;grid-template-columns:1.25fr 1fr;gap:32px;align-items:stretch}
.ct-card{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;display:flex;flex-direction:column}
.ct-map{position:relative;flex:1;min-height:300px}
.ct-map img{width:100%;height:100%;object-fit:cover}
.ct-map .ct-pin{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.95);box-shadow:var(--shadow-lg);display:flex;align-items:center;justify-content:center}
.ct-map .ct-pin svg{width:22px;height:22px;color:var(--brand)}
.ct-map .ct-pin::after{content:"";position:absolute;inset:-10px;border-radius:50%;border:2px solid rgba(0,82,217,.4);animation:pinHalo 2.2s ease-out infinite}
@keyframes pinHalo{0%{transform:scale(.7);opacity:.8}100%{transform:scale(1.25);opacity:0}}
.ct-info{display:grid;grid-template-columns:1fr;gap:0}
.ct-row{display:flex;align-items:center;gap:16px;padding:18px 26px}
.ct-row+.ct-row{border-top:1px solid var(--line)}
.ct-row .cico{width:48px;height:48px;border-radius:14px;background:linear-gradient(135deg,var(--brand-soft),var(--bg-2));display:flex;align-items:center;justify-content:center;flex-shrink:0}
.ct-row .cico svg{width:24px;height:24px;color:var(--brand)}
.ct-row .ctxt{flex:1}
.ct-row .ctxt b{display:block;font-size:16px;font-weight:700;color:var(--ink);margin-bottom:3px}
.ct-row .ctxt b.tel{font-size:24px;letter-spacing:.03em;background:linear-gradient(120deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.ct-row .ctxt span{font-size:13.5px;color:var(--ink-3)}
.ct-card2{background:#fff;border:1px solid var(--line);border-radius:20px;display:flex;flex-direction:column;overflow:hidden}
.ct-tel{background:linear-gradient(135deg,var(--brand-soft),var(--bg-2));padding:30px 28px 24px;border-bottom:1px solid var(--line)}
.ct-tel-label{display:block;font-size:13px;font-weight:600;color:var(--ink-2);letter-spacing:.1em;margin-bottom:6px}
.ct-tel-num{display:inline-block;font-size:38px;font-weight:800;letter-spacing:.02em;line-height:1.25;background:linear-gradient(120deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.ct-tel-tip{display:block;font-size:12.5px;color:var(--ink-3);margin-top:8px}
.ct-row.addr{padding:20px 26px;border-bottom:1px solid var(--line)}
.ct-qr{flex:1;padding:30px 26px;display:flex;align-items:center;gap:26px}
.ct-qr .qr-box{width:164px;height:164px;border-radius:0;background:none;border:none;display:flex;align-items:center;justify-content:center;padding:0;flex-shrink:0}
.ct-qr .qr-box img{width:100%;height:100%;object-fit:contain}
.ct-qr .qr-txt b{font-size:17px;color:var(--ink);display:block;margin-bottom:6px}
.ct-qr .qr-txt p{font-size:13px;color:var(--ink-3);line-height:1.8}
/* ============ Footer（与 index.html 一致） ============ */
footer{background:#0E2233;color:#B8CBDC;margin-top:0}
.foot-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;padding:26px 0 22px;border-bottom:1px solid rgba(255,255,255,.1)}
.fs-item{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:nowrap;white-space:nowrap;height:30px}
.fs-item img{width:30px;height:30px;object-fit:contain;flex-shrink:0;display:block}
.fs-item span{color:#E8F0F8;font-size:14px;line-height:30px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1fr;gap:32px;padding:36px 0}
.foot-brand .logo{color:#fff;margin-bottom:14px}
.foot-brand .logo .logo-mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:inline-flex;align-items:center;justify-content:center;margin-right:8px;vertical-align:-8px}
.foot-brand .logo .logo-mark svg{width:18px;height:18px}
.foot-brand p{font-size:13.5px;color:#8FA9BC;max-width:280px;margin-bottom:16px}
.fhotline{font-size:14px;color:#8FA9BC}
.fhotline b{display:block;font-size:24px;color:#fff;font-weight:800;letter-spacing:.03em;margin:4px 0}
.fcol h5{font-size:15px;font-weight:700;color:#fff;margin-bottom:14px}
.fcol a{display:block;font-size:13.5px;color:#9FB6C7;padding:5px 0;transition:color .2s}
.fcol a:hover{color:#7CC8FF}
.foot-legal{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;text-align:center;font-size:12.5px;color:#7290A4}
.foot-legal a{color:#7290A4;margin:0 8px}
/* 悬浮与回顶 */
.side-rail{position:fixed;right:22px;top:50%;transform:translateY(-50%);z-index:150;display:flex;flex-direction:column;align-items:center;gap:14px}
.rail-pill{position:relative;display:flex;flex-direction:column;align-items:center;gap:9px;width:62px;padding:18px 0;border-radius:32px;background:linear-gradient(160deg,var(--brand-2),var(--brand));color:#fff;text-decoration:none;transition:transform .25s}
.rail-pill::after{content:"";position:absolute;inset:-8px;border-radius:38px;border:2px solid rgba(0,82,217,.35);opacity:0;animation:railHalo 2.6s ease-out infinite;pointer-events:none;z-index:-1}
.rail-pill:hover{transform:translateY(-2px)}
.rail-pill svg{width:22px;height:22px}
.rail-pill span{writing-mode:vertical-rl;font-size:13.5px;font-weight:600;letter-spacing:2px}
@keyframes railHalo{0%{transform:scale(1);opacity:.6}100%{transform:scale(1.28);opacity:0}}
.rail-item{position:relative;display:flex;align-items:center;justify-content:center;text-decoration:none}
.rail-mini{width:52px;height:52px;border-radius:50%;background:#fff;border:1px solid var(--line);color:var(--brand);display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px rgba(0,60,150,.14);transition:transform .25s,box-shadow .25s}
.rail-mini svg{width:22px;height:22px}
.rail-item:hover .rail-mini{transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,82,217,.22)}
.rail-pop{position:absolute;right:calc(100% + 12px);top:50%;transform:translateY(-50%) translateX(8px);background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 16px;white-space:nowrap;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:all .25s var(--ease)}
.rail-item:hover .rail-pop{opacity:1;visibility:visible;transform:translateY(-50%) translateX(0)}
.rail-pop b{display:block;font-size:13px;color:var(--ink);margin-bottom:3px}
.rail-pop p{font-size:13.5px;color:var(--brand);font-weight:700}
.rail-pop p span{font-size:11.5px;color:var(--ink-3);font-weight:400}
#toTop{display:none;position:fixed;right:22px;bottom:28px;width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--line);color:var(--brand);align-items:center;justify-content:center;box-shadow:var(--shadow);z-index:150;cursor:pointer;transition:all .25s}
#toTop:hover{background:var(--brand-soft)}
#toTop.show{display:flex}
#toTop svg{width:20px;height:20px}
/* ============ 响应式 ============ */
@media (max-width:1024px){
  .overview{grid-template-columns:1fr}
  .ov-img{min-height:360px}
  .certs{grid-template-columns:repeat(3,1fr)}
  .clients{grid-template-columns:repeat(4,1fr)}
  .contact{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .nav-menu{position:fixed;inset:68px 0 auto 0;background:#fff;flex-direction:column;padding:16px;gap:4px;box-shadow:var(--shadow-lg);display:none;max-height:calc(100vh - 68px);overflow:auto}
  .nav-menu.open{display:flex}
  .nav-item .drop{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;border:none;display:none;padding-left:14px}
  .nav-item.open .drop{display:block}
  .burger{display:flex}
  .nav-login{display:none}
  .page-head{padding:96px 0 30px}
  .page-head h1{font-size:28px}
  .sec{padding:40px 0}
  .sec-title h2{font-size:26px}
  .ov-img{min-height:280px}
  .ov-nums{flex-direction:column;gap:16px}
  .ov-num{border-right:none;border-bottom:1px solid var(--brand-line);padding:8px 0}
  .ov-num:last-child{border-bottom:none}
  .certs{grid-template-columns:repeat(2,1fr)}
  .clients{grid-template-columns:repeat(3,1fr)}
  .foot-strip{grid-template-columns:1fr 1fr;row-gap:18px}
  .foot-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}