:root{--blue:#1e5aa8;--navy:#123c72;--orange:#f39c12;--ink:#22303f;--muted:#64748b;--line:#e6ebf1;--bg:#f6f8fb}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;color:var(--ink);line-height:1.7;background:#fff}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
/* topbar */
.topbar{background:var(--navy);color:#cfe0f5;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;min-height:34px;gap:10px}
.top-tel{color:#ffd28a;font-weight:600}
/* masthead */
.masthead{border-bottom:1px solid var(--line)}
.masthead>.wrap{display:flex;align-items:center;justify-content:space-between;padding-top:14px;padding-bottom:14px}
.logo{display:flex;align-items:center;gap:12px}
.logo-txt strong{display:block;font-size:24px;color:var(--navy);letter-spacing:2px}
.logo-txt em{display:block;font-style:normal;font-size:12px;color:var(--muted);letter-spacing:1px}
.head-tel{text-align:right}
.head-tel small{display:block;color:var(--muted);font-size:12px}
.head-tel a{font-size:22px;font-weight:700;color:var(--blue)}
.nav-toggle{display:none}
.burger{display:none;width:40px;height:36px;cursor:pointer}
.burger span,.burger span::before,.burger span::after{content:"";display:block;width:22px;height:2px;background:var(--navy);margin:5px auto;transition:.2s}
/* nav */
.mainnav{background:var(--blue)}
.mainnav ul{display:flex;flex-wrap:wrap}
.mainnav a{display:block;padding:13px 26px;color:#fff;font-size:16px}
.mainnav a:hover,.mainnav li.on a,.mainnav a.cur{background:var(--navy)}
/* hero（左文右图，文字不上图） */
.hero{background:radial-gradient(1200px 600px at 85% -10%,#2a6bc4 0%,transparent 60%),linear-gradient(115deg,#0d2648 0%,#123c72 55%,#1e5aa8 100%);padding:72px 0 110px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-txt{color:#fff}
.eyebrow{display:inline-block;font-size:14px;letter-spacing:2px;color:#ffd28a;border:1px solid rgba(255,210,138,.5);border-radius:999px;padding:6px 16px;margin-bottom:22px}
.hero-txt h1{font-size:38px;line-height:1.35}
.hero-txt .sub{margin-top:16px;font-size:17px;color:#d8e5f4;max-width:520px}
.hero-btn{margin-top:28px;display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;margin-top:38px;flex-wrap:wrap}
.hero-stats b{display:block;font-size:22px;color:#ffd28a}
.hero-stats span{font-size:13px;color:#c3d4e8}
.hero-pic{position:relative;border-radius:16px;overflow:hidden;box-shadow:0 24px 60px rgba(4,18,38,.5);height:420px}
.hero-pic .slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity .9s}
.hero-pic .slide.on{opacity:1}
.hero-badge{position:absolute;left:18px;bottom:18px;background:rgba(9,25,48,.82);backdrop-filter:blur(4px);color:#fff;border-radius:10px;padding:12px 18px}
.hero-badge b{display:block;color:#ffd28a;font-size:16px}
.hero-badge span{font-size:13px;color:#d8e5f4}
.btn{display:inline-block;padding:12px 28px;border-radius:6px;font-weight:600;transition:.2s}
.btn.solid{background:var(--orange);color:#fff}
.btn.solid:hover{background:#e08e0b}
.btn.line{border:1.5px solid rgba(255,255,255,.8);color:#fff}
.btn.big{font-size:18px;padding:14px 36px}
/* strip */
.strip{margin-top:-46px;position:relative;z-index:3}
.strip ul{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.strip li{background:#fff;border-radius:10px;box-shadow:0 8px 26px rgba(18,60,114,.12);text-align:center;padding:20px 10px}
.strip b{display:block;font-size:22px;color:var(--blue)}
.strip span{font-size:13px;color:var(--muted)}
/* sections */
.sec{padding:64px 0}
.sec.alt{background:var(--bg)}
.sec-h{text-align:center;margin-bottom:36px}
.sec-h.lft{text-align:left}
.sec-h h1,.sec-h h2{font-size:30px;color:var(--navy);margin:0;font-weight:700}
.sec-h h1 small,.sec-h h2 small{font-size:14px;color:var(--muted);font-weight:400;margin-left:8px}
.sec-h p{color:var(--muted);margin-top:8px}
.more{color:var(--blue);font-weight:600}
/* cat grid */
.cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.cat-card{display:grid;grid-template-columns:200px 1fr;gap:18px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.2s}
.sec:not(.alt) .cat-card{background:#fff}
.cat-card:hover{box-shadow:0 10px 30px rgba(18,60,114,.14);transform:translateY(-3px)}
.cat-card img{width:200px;height:150px;object-fit:cover}
.cat-card div{padding:14px 18px 14px 0}
.cat-card h3{color:var(--navy);font-size:20px}
.cat-card p{color:var(--muted);font-size:14px;margin:6px 0}
.cat-card span{color:var(--blue);font-size:14px;font-weight:600}
/* product grid */
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid4 figure,.grid3 figure{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;transition:.2s;height:100%}
.grid4 figure:hover,.grid3 figure:hover{box-shadow:0 10px 26px rgba(18,60,114,.13);transform:translateY(-3px)}
.grid4 img,.grid3 img{width:100%;aspect-ratio:4/3;object-fit:cover}
figcaption{padding:12px 14px}
figcaption b{display:block;font-size:16px}
figcaption span{font-size:13px;color:var(--muted)}
/* why */
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.why-grid li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px}
.sec.alt .why-grid li{background:#fff}
.why-grid h3{color:var(--navy);margin-bottom:8px;font-size:18px}
.why-grid p{color:var(--muted);font-size:14.5px}
.why-mini{margin-top:16px}
.why-mini li{padding:6px 0;color:var(--navy);font-weight:600}
/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:s}
.steps li{background:#fff;border:1px solid var(--line);border-radius:10px;text-align:center;padding:26px 12px;font-weight:600;color:var(--navy);position:relative}
.steps b{display:block;width:44px;height:44px;line-height:44px;border-radius:50%;background:var(--blue);color:#fff;font-size:18px;margin:0 auto 10px}
/* about */
.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center}
.about-grid p{margin:10px 0;color:#3d4c5e}
.about-grid figure img{border-radius:12px}
/* faq */
.faq-box details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin-bottom:12px}
.faq-box summary{font-weight:600;color:var(--navy);cursor:pointer}
.faq-box p{margin-top:10px;color:#3d4c5e}
.qa{background:#fff;border:1px solid var(--line);border-radius:10px;padding:20px 24px;margin-bottom:14px}
.qa h3{color:var(--navy);font-size:18px;margin-bottom:8px}
.qa p{color:#3d4c5e}
.narrow{max-width:860px}
/* cta */
.cta{background:linear-gradient(120deg,var(--navy),var(--blue));color:#fff;text-align:center;padding:56px 0}
.cta h2{font-size:26px}
.cta p{margin:10px 0 22px;color:#dbe7f5}
/* footer */
.site-foot{background:#0e2338;color:#9fb3c8;font-size:14px;padding:48px 0 0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:30px;padding-bottom:32px}
.site-foot h3{color:#fff;font-size:16px;margin-bottom:12px}
.foot-nav li{padding:3px 0}
.foot-contact li{padding:3px 0}
.site-foot a:hover{color:#fff}
.icp{margin-top:10px;font-size:12px}
.foot-btm{border-top:1px solid rgba(255,255,255,.08);padding:16px 20px;text-align:center;font-size:13px}
.call-fab{display:none}
/* crumb */
.crumb{padding:16px 20px;color:var(--muted);font-size:14px}
.crumb b{color:var(--navy)}
/* quick cats */
.quick-cats{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.quick-cats a{display:inline-block;padding:8px 20px;border:1px solid var(--blue);color:var(--blue);border-radius:999px;font-weight:600}
.quick-cats a:hover{background:var(--blue);color:#fff}
.cat-block{padding:40px 0}
.cat-block:nth-child(odd){background:var(--bg)}
/* contact */
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:start}
.contact-list li{display:flex;gap:14px;padding:12px 0;border-bottom:1px dashed var(--line)}
.contact-list b{flex:0 0 90px;color:var(--navy)}
.qr-box{text-align:center;background:var(--bg);border-radius:12px;padding:26px}
.qr-box img{margin:0 auto 14px;border-radius:8px}
.areas{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;text-align:center}
.areas li{background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px;font-weight:600;color:var(--navy)}
.areas li a{display:block;color:var(--navy)}
.areas li:hover,.area-grid li:hover{box-shadow:0 8px 22px rgba(18,60,114,.12)}
/* 服务区域 */
.area-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.area-grid li a{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;height:100%;transition:.2s}
.area-grid li a:hover{border-color:var(--blue);transform:translateY(-3px)}
.area-grid b{display:block;font-size:19px;color:var(--navy);margin-bottom:6px}
.area-grid span{display:block;font-size:13px;color:var(--muted);line-height:1.6;min-height:42px}
.area-grid em{display:block;margin-top:10px;font-style:normal;font-size:13px;color:var(--blue);font-weight:600}
.foot-areas{margin-top:10px;line-height:2}
.foot-areas a{display:inline-block;margin:0 8px 4px 0;padding:1px 8px;border:1px solid rgba(255,255,255,.18);border-radius:4px;font-size:12.5px}
/* 区域页 */
.area-hero{background:linear-gradient(115deg,#0d2648,#1e5aa8);color:#fff;padding:52px 0}
.area-hero h1{font-size:32px;line-height:1.4}
.area-hero p{margin-top:14px;color:#d8e5f4;max-width:900px}
.area-hero .hero-btn{margin-top:24px}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.chips li{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 16px;font-size:14px;color:var(--navy)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.two-col li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px 20px}
.two-col b{display:block;color:var(--navy);margin-bottom:4px}
.two-col p{color:var(--muted);font-size:14.5px}
.area-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.area-links a{padding:8px 18px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:14px;color:var(--navy)}
.area-links a:hover{border-color:var(--blue);color:var(--blue)}
.mt24{margin-top:24px;color:var(--navy);font-size:19px}
/* responsive */
@media (max-width:960px){
 .grid4{grid-template-columns:repeat(3,1fr)}
 .why-grid,.steps{grid-template-columns:repeat(2,1fr)}
 .areas{grid-template-columns:repeat(3,1fr)}
 .foot-grid{grid-template-columns:1fr 1fr}
 .area-grid{grid-template-columns:repeat(3,1fr)}
 .about-grid,.contact-grid{grid-template-columns:1fr}
 .hero{padding:52px 0 90px}
 .hero-grid{grid-template-columns:1fr;gap:34px}
 .hero-txt h1{font-size:30px}
 .hero-pic{height:300px}
}
@media (max-width:680px){
 .topbar .wrap span{display:none}
 .head-tel{display:none}
 .burger{display:block}
 .mainnav{display:none}
 .nav-toggle:checked~.mainnav,.nav-toggle:checked~* .mainnav{display:block}
 .mainnav ul{flex-direction:column}
 .mainnav a{padding:12px 20px;border-top:1px solid rgba(255,255,255,.12)}
 .hero{padding:40px 0 80px}
 .hero-txt h1{font-size:25px}
 .hero-stats{gap:20px;margin-top:26px}
 .hero-pic{height:220px}
 .grid4,.grid3{grid-template-columns:repeat(2,1fr)}
 .cat-grid{grid-template-columns:1fr}
 .cat-card{grid-template-columns:130px 1fr}
 .cat-card img{width:130px;height:110px}
 .why-grid,.steps{grid-template-columns:1fr}
 .areas{grid-template-columns:repeat(2,1fr)}
 .area-grid{grid-template-columns:repeat(2,1fr)}
 .area-hero{padding:36px 0}
 .area-hero h1{font-size:23px}
 .two-col{grid-template-columns:1fr}
 .foot-grid{grid-template-columns:1fr 1fr;gap:22px 18px}
 .foot-grid>div:first-child,.foot-grid>div:last-child{grid-column:1/-1}
 .foot-grid h3{font-size:15px;margin-bottom:6px}
 .foot-nav li,.foot-contact li{padding:2px 0;font-size:13.5px}
 .site-foot{padding-top:34px}
 .foot-btm{padding-bottom:74px}
 .call-fab{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:99;align-items:center;justify-content:center;gap:8px;background:var(--orange);color:#fff;border-radius:0;padding:14px 0 calc(14px + env(safe-area-inset-bottom));font-weight:700;font-size:16px;letter-spacing:1px;box-shadow:0 -6px 20px rgba(0,0,0,.16)}
 .call-fab:active{transform:translateY(1px)}
 .strip ul{grid-template-columns:repeat(2,1fr)}
 .sec{padding:44px 0}
}