:root{
  --brand:#14487a; --brand-d:#0d3155; --brand-l:#1d63a8;
  --accent:#e0761b; --accent-d:#bd5f12;
  --ink:#1f2937; --ink-2:#374151; --muted:#6b7280; --muted-2:#9ca3af;
  --bg:#ffffff; --soft:#f5f7fa; --soft-2:#eef2f7;
  --line:#e4e9f0; --line-2:#d3dae4;
  --radius:12px; --radius-s:8px;
  --shadow:0 1px 3px rgba(16,24,40,.06),0 1px 2px rgba(16,24,40,.04);
  --shadow-m:0 6px 20px rgba(16,24,40,.10);
  --shadow-l:0 18px 44px rgba(16,24,40,.16);
  --maxw:1200px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.35;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(26px,4.2vw,44px)} h2{font-size:clamp(22px,3vw,32px)} h3{font-size:19px}
p{margin:0 0 1em}
ul{margin:0 0 1em;padding-left:1.3em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:var(--radius-s);
  font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;transition:.18s;line-height:1.4}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-d);transform:translateY(-1px)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5);backdrop-filter:blur(6px)}
.btn-ghost:hover{background:rgba(255,255,255,.26)}
.btn-line{background:#fff;color:var(--brand);border-color:var(--line-2)}
.btn-line:hover{border-color:var(--brand);background:var(--soft)}
.btn-lg{padding:15px 32px;font-size:16px}

/* 顶栏 */
.head{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.head-in{display:flex;align-items:center;gap:24px;height:70px}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo img{height:40px;width:auto}
.logo-t{font-size:17px;font-weight:800;color:var(--brand);letter-spacing:.02em;line-height:1.2}
.logo-s{font-size:11px;color:var(--muted);letter-spacing:.06em}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{padding:8px 15px;border-radius:var(--radius-s);font-size:15px;color:var(--ink-2);
  font-weight:500;transition:.16s;white-space:nowrap}
.nav a:hover{color:var(--brand);background:var(--soft)}
.nav a.on{color:var(--brand);font-weight:700;background:#eaf1f9}
.head-tel{display:flex;align-items:center;gap:8px;padding:9px 18px;background:var(--brand);
  color:#fff;border-radius:var(--radius-s);font-weight:700;font-size:15px;white-space:nowrap}
.head-tel:hover{background:var(--brand-d)}
.burger{display:none;margin-left:auto;width:42px;height:42px;border:1px solid var(--line-2);
  border-radius:var(--radius-s);background:#fff;cursor:pointer;position:relative}
.burger i{position:absolute;left:11px;width:18px;height:2px;background:var(--ink);transition:.2s}
.burger i:nth-child(1){top:14px} .burger i:nth-child(2){top:20px} .burger i:nth-child(3){top:26px}
.burger.x i:nth-child(1){top:20px;transform:rotate(45deg)}
.burger.x i:nth-child(2){opacity:0}
.burger.x i:nth-child(3){top:20px;transform:rotate(-45deg)}

/* Hero */
.hero{position:relative;min-height:min(600px,72vh);display:flex;align-items:center;
  overflow:hidden;background:var(--brand-d)}
.hero-sl{position:absolute;inset:0;opacity:0;transition:opacity .9s ease}
.hero-sl.on{opacity:1}
.hero-sl img{width:100%;height:100%;object-fit:cover}
.hero-mask{position:absolute;inset:0;background:linear-gradient(100deg,rgba(9,26,46,.88) 0%,rgba(9,26,46,.66) 46%,rgba(9,26,46,.28) 100%)}
.hero-in{position:relative;z-index:2;width:100%;padding:76px 0;color:#fff}
.hero-tag{display:inline-block;padding:5px 14px;border:1px solid rgba(255,255,255,.34);
  border-radius:99px;font-size:13px;margin-bottom:18px;letter-spacing:.04em}
.hero h1{color:#fff;margin-bottom:14px;text-shadow:0 2px 12px rgba(0,0,0,.3)}
.hero-sub{font-size:clamp(14px,1.6vw,17px);opacity:.92;margin-bottom:28px;max-width:640px;line-height:1.9}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:40px}
.hero-stats{display:flex;gap:0;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.2);padding-top:22px}
.hero-stats div{padding-right:38px;margin-right:38px;border-right:1px solid rgba(255,255,255,.16)}
.hero-stats div:last-child{border:0;margin:0;padding:0}
.hero-stats b{display:block;font-size:26px;font-weight:800;line-height:1.2}
.hero-stats span{font-size:13px;opacity:.8}

/* 分区 */
.sec{padding:76px 0}
.sec-soft{background:var(--soft)}
.sec-head{text-align:center;max-width:680px;margin:0 auto 44px}
.sec-head h2{margin-bottom:12px}
.sec-head p{color:var(--muted);margin:0;font-size:16px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--accent);
  letter-spacing:.14em;text-transform:uppercase;margin-bottom:10px}

/* 优势 */
.feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.feat-i{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;transition:.2s}
.feat-i:hover{box-shadow:var(--shadow-m);transform:translateY(-3px);border-color:var(--line-2)}
.feat-ic{width:46px;height:46px;border-radius:11px;background:#eaf1f9;display:flex;
  align-items:center;justify-content:center;margin-bottom:16px;color:var(--brand)}
.feat-ic svg{width:24px;height:24px}
.feat-i h3{font-size:17px;margin-bottom:6px}
.feat-i p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.75}

/* 卡片网格 */
.grid{display:grid;gap:22px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.card:hover{box-shadow:var(--shadow-m);transform:translateY(-3px)}
.card-img{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--soft-2)}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.card:hover .card-img img{transform:scale(1.05)}
.card-b{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.card-b h3{font-size:16px;margin-bottom:6px;line-height:1.5}
.card-b p{margin:0 0 12px;color:var(--muted);font-size:14px;line-height:1.7;flex:1}
.tag-s{display:inline-block;align-self:flex-start;padding:3px 10px;background:#eaf1f9;
  color:var(--brand);border-radius:5px;font-size:12px;font-weight:600}
.specs{margin:12px 0 0;padding:12px 0 0;border-top:1px dashed var(--line);
  display:grid;gap:5px;font-size:13px;color:var(--muted)}
.specs span{display:flex;justify-content:space-between;gap:12px}
.specs b{font-weight:600;color:var(--ink-2)}

/* 筛选 */
.filters{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:34px}
.filters button{padding:8px 20px;border:1px solid var(--line-2);background:#fff;
  border-radius:99px;font-size:14px;font-weight:600;color:var(--ink-2);cursor:pointer;
  transition:.16s;font-family:inherit}
.filters button:hover{border-color:var(--brand);color:var(--brand)}
.filters button.on{background:var(--brand);border-color:var(--brand);color:#fff}

/* 流程 */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:0;counter-reset:s}
.step{position:relative;padding:0 22px}
.step::before{counter-increment:s;content:counter(s);display:flex;align-items:center;
  justify-content:center;width:38px;height:38px;border-radius:50%;background:var(--brand);
  color:#fff;font-weight:800;margin-bottom:14px}
.step:not(:last-child)::after{content:'';position:absolute;top:19px;left:calc(50% + 30px);
  right:-8px;height:1px;background:repeating-linear-gradient(90deg,var(--line-2) 0 6px,transparent 6px 12px)}
.step h3{font-size:16px;margin-bottom:5px}
.step p{margin:0;color:var(--muted);font-size:14px}

/* 案例瀑布 */
.masonry{columns:3;column-gap:20px}
.masonry .mi{break-inside:avoid;margin-bottom:20px;position:relative;border-radius:var(--radius);
  overflow:hidden;cursor:pointer;background:var(--soft-2);border:1px solid var(--line)}
.masonry .mi img{width:100%;transition:transform .45s}
.masonry .mi:hover img{transform:scale(1.05)}
.masonry .mi figcaption{position:absolute;left:0;right:0;bottom:0;padding:32px 16px 14px;
  background:linear-gradient(transparent,rgba(9,26,46,.86));color:#fff;font-size:14px;font-weight:600}
.masonry .mi small{display:block;font-weight:400;opacity:.82;font-size:12.5px;margin-top:2px}

/* 关于 */
.about-g{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.about-g figure{margin:0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-m)}
.lead{font-size:17px;color:var(--ink-2);line-height:1.9}
.facts{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:26px 0 0}
.fact{background:var(--soft);border-radius:var(--radius-s);padding:16px 18px}
.fact b{display:block;font-size:22px;color:var(--brand)}
.fact span{font-size:13.5px;color:var(--muted)}

/* 新闻 */
.news-i{display:flex;gap:22px;padding:24px 0;border-bottom:1px solid var(--line);align-items:flex-start}
.news-i:last-child{border:0}
.news-d{flex:0 0 92px;text-align:center;background:var(--soft);border-radius:var(--radius-s);padding:12px 6px}
.news-d b{display:block;font-size:26px;color:var(--brand);line-height:1.1}
.news-d span{font-size:12.5px;color:var(--muted)}
.news-c h3{font-size:18px;margin-bottom:6px}
.news-c p{margin:0 0 8px;color:var(--muted);font-size:14.5px}
.news-c .more{font-size:14px;color:var(--brand);font-weight:600}
.news-body{margin-top:14px;color:var(--ink-2);font-size:15px;display:none}
.news-body.open{display:block}
.news-body p{margin-bottom:.9em}

/* CTA 条 */
.cta{background:linear-gradient(120deg,var(--brand-d),var(--brand));color:#fff;padding:56px 0}
.cta-in{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta h2{color:#fff;margin:0 0 6px}
.cta p{margin:0;opacity:.88}
.cta .btn-primary{background:#fff;color:var(--brand-d)}
.cta .btn-primary:hover{background:var(--soft-2)}

/* 联系 */
.contact-g{display:grid;grid-template-columns:1fr 1.15fr;gap:48px}
.info-i{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.info-i:last-child{border:0}
.info-i .ic{flex:0 0 42px;height:42px;border-radius:10px;background:#eaf1f9;
  display:flex;align-items:center;justify-content:center;color:var(--brand)}
.info-i .ic svg{width:20px;height:20px}
.info-i small{display:block;font-size:12.5px;color:var(--muted-2);margin-bottom:2px}
.info-i b{font-size:15.5px;font-weight:600}
.info-i b a{color:var(--brand)}
.frm{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.frm h3{margin-bottom:4px}
.frm>p{color:var(--muted);font-size:14px;margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.field input,.field textarea,.field select{width:100%;padding:11px 14px;border:1px solid var(--line-2);
  border-radius:var(--radius-s);font-size:15px;font-family:inherit;background:#fff;transition:.16s}
.field input:focus,.field textarea:focus,.field select:focus{outline:0;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(20,72,122,.1)}
.field textarea{min-height:104px;resize:vertical}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.frm-note{font-size:12.5px;color:var(--muted);margin:14px 0 0;text-align:center}
.map{margin-top:34px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--soft)}
.map iframe{width:100%;height:320px;border:0;display:block}

/* 页脚 */
.foot{background:#111a26;color:#a9b6c6;padding:60px 0 0;font-size:14.5px}
.foot-g{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px}
.foot h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.03em}
.foot a{color:#a9b6c6;transition:.16s}
.foot a:hover{color:#fff}
.foot ul{list-style:none;margin:0;padding:0}
.foot li{margin-bottom:9px}
.foot .logo-t{color:#fff}
.foot-logo{height:38px;width:auto;filter:brightness(0) invert(1);opacity:.95;margin-bottom:14px}
.foot .d{color:#7e8da0;line-height:1.9;font-size:14px}
.foot-b{border-top:1px solid #1f2b3a;padding:18px 0;font-size:13px;color:#7e8da0;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* 悬浮客服 */
.dock{position:fixed;right:14px;bottom:88px;z-index:90;display:flex;flex-direction:column;gap:10px}
.dock a{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-m);color:var(--brand);transition:.18s}
.dock a:hover{background:var(--brand);color:#fff;transform:translateY(-2px)}
.dock svg{width:21px;height:21px}
.dock .tel{background:var(--accent);border-color:var(--accent);color:#fff}
.dock .tel:hover{background:var(--accent-d)}
#top{position:fixed;right:14px;bottom:26px;z-index:90;width:48px;height:48px;border-radius:50%;
  border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-m);cursor:pointer;
  display:none;align-items:center;justify-content:center;color:var(--ink-2)}
#top.show{display:flex}
#top:hover{background:var(--brand);color:#fff}

/* 灯箱 */
.lb{position:fixed;inset:0;z-index:200;background:rgba(8,16,28,.92);display:none;
  align-items:center;justify-content:center;padding:24px}
.lb.on{display:flex}
.lb img{max-width:100%;max-height:88vh;border-radius:6px;box-shadow:var(--shadow-l)}
.lb-x{position:absolute;top:18px;right:22px;width:44px;height:44px;border:0;background:rgba(255,255,255,.12);
  color:#fff;font-size:26px;border-radius:50%;cursor:pointer;line-height:1}
.lb-x:hover{background:rgba(255,255,255,.24)}
.lb-cap{position:absolute;bottom:24px;left:0;right:0;text-align:center;color:#dbe4ee;font-size:14px}

/* 面包屑 */
.crumb{background:var(--soft);border-bottom:1px solid var(--line);padding:13px 0;font-size:13.5px;color:var(--muted)}
.crumb a:hover{color:var(--brand)}
.crumb span{margin:0 8px;color:var(--muted-2)}

/* 响应式 */
@media(max-width:1024px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .foot-g{grid-template-columns:1fr 1fr}
  .masonry{columns:2}
}
@media(max-width:860px){
  .nav{display:none;position:absolute;top:70px;left:0;right:0;flex-direction:column;gap:0;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow-m);padding:8px}
  .nav.open{display:flex}
  .nav a{padding:13px 20px;border-radius:0;border-bottom:1px solid var(--soft-2)}
  .nav a:last-child{border:0}
  .head-tel{display:none}
  .burger{display:block}
  .about-g,.contact-g{grid-template-columns:1fr;gap:32px}
  .masonry{columns:2}
  .hero-stats div{padding-right:22px;margin-right:22px}
  .hero-stats b{font-size:21px}
  .step:not(:last-child)::after{display:none}
  .sec{padding:52px 0}
}
@media(max-width:560px){
  .g4,.g3,.g2{grid-template-columns:1fr}
  .masonry{columns:1}
  .foot-g{grid-template-columns:1fr}
  .news-i{flex-direction:column;gap:12px}
  .news-d{display:flex;gap:10px;align-items:baseline;width:auto;text-align:left;padding:6px 12px}
  .news-d b{font-size:17px}
  .row2{grid-template-columns:1fr}
  .dock{right:10px;bottom:78px}
  .cta-in{flex-direction:column;align-items:flex-start}
}
@media print{.dock,#top,.head{display:none}}