/* ============================================================
   盐城无忧水下工程有限公司 · 站点样式
   ============================================================ */

:root{
  --navy:#072b43;
  --navy2:#0b4f7a;
  --blue:#1478b8;
  --blue-l:#e9f3fa;
  --accent:#d9663a;
  --accent-l:#fbeee8;
  --ink:#0f2233;
  --ink2:#41586c;
  --ink3:#7b8fa1;
  --paper:#ffffff;
  --mist:#f5f8fb;
  --line:#e3eaf1;
  --line-d:#cfdbe6;
  --wrap:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink2);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
button{font:inherit;cursor:pointer;}
::selection{background:var(--blue);color:#fff;}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 32px;}
.wrap-nar{max-width:900px;margin:0 auto;padding:0 32px;}

/* ---------- 通用文字 ---------- */
.kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12px;letter-spacing:2.5px;color:var(--accent);
  font-weight:700;text-transform:uppercase;margin-bottom:16px;
}
.kicker::before{content:"";width:18px;height:1px;background:var(--accent);}
h1.big{font-size:46px;line-height:1.28;font-weight:700;color:var(--ink);letter-spacing:-.5px;}
h2.big{font-size:32px;line-height:1.35;font-weight:700;color:var(--ink);letter-spacing:-.3px;}
h3.mid{font-size:20px;line-height:1.5;font-weight:700;color:var(--ink);}
.lead{font-size:17px;line-height:1.85;color:var(--ink2);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:50px;padding:0 26px;border-radius:2px;
  font-size:15px;font-weight:600;letter-spacing:.5px;
  border:1px solid transparent;transition:all .25s var(--ease);white-space:nowrap;
}
.btn svg{width:16px;height:16px;flex:0 0 auto;}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:#c2552c;transform:translateY(-1px);box-shadow:0 8px 20px rgba(217,102,58,.28);}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.38);}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;}
.btn-line{background:transparent;color:var(--navy2);border-color:var(--line-d);}
.btn-line:hover{border-color:var(--navy2);background:var(--blue-l);}
.btn-sm{height:40px;padding:0 18px;font-size:13.5px;}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--navy);color:#8fb3c9;font-size:12.5px;
  border-bottom:1px solid rgba(255,255,255,.07);
}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:38px;}
.topbar-l{display:flex;align-items:center;gap:22px;}
.topbar-l span{display:inline-flex;align-items:center;gap:6px;}
.topbar-l svg{width:13px;height:13px;opacity:.7;}
.topbar-r svg{width:13px;height:13px;opacity:.7;}
.topbar-r{display:flex;align-items:center;gap:18px;}
.topbar-r b{color:#fff;font-weight:600;letter-spacing:.5px;}
.dot{width:6px;height:6px;border-radius:50%;background:#48c78e;display:inline-block;
  box-shadow:0 0 0 3px rgba(72,199,142,.18);animation:pulse 2.4s infinite;}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}

/* ---------- 导航 ---------- */
.header{
  position:sticky;top:0;z-index:90;background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.header .wrap{display:flex;align-items:center;justify-content:space-between;height:76px;}
.logo{display:flex;align-items:center;gap:12px;}
.logo-mark{
  width:40px;height:40px;border-radius:2px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--navy2),#0a3c5d);
  display:grid;place-items:center;position:relative;overflow:hidden;
}
.logo-mark svg{width:22px;height:22px;}
.logo-txt strong{display:block;font-size:17px;color:var(--ink);letter-spacing:1.5px;line-height:1.25;font-weight:700;}
.logo-txt small{display:block;font-size:9.5px;color:var(--ink3);letter-spacing:1.6px;text-transform:uppercase;}
.nav{display:flex;align-items:center;gap:2px;}
.nav>li{position:relative;}
.nav>li>a{
  display:block;padding:0 15px;line-height:76px;font-size:15px;color:var(--ink2);
  font-weight:500;transition:color .2s;position:relative;
}
.nav>li>a::after{
  content:"";position:absolute;left:15px;right:15px;bottom:24px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .28s var(--ease);
}
.nav>li>a:hover,.nav>li.act>a{color:var(--navy2);}
.nav>li>a:hover::after,.nav>li.act>a::after{transform:scaleX(1);}
.nav .has-sub>a::before{
  content:"";position:absolute;right:3px;top:50%;margin-top:-1px;
  border:3.5px solid transparent;border-top-color:currentColor;opacity:.5;
}
.nav .has-sub>a{padding-right:24px;}
.sub{
  position:absolute;top:76px;left:0;min-width:250px;background:#fff;
  border:1px solid var(--line);border-top:2px solid var(--accent);
  box-shadow:0 18px 40px rgba(15,34,51,.12);
  padding:8px 0;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:all .24s var(--ease);
}
.nav .has-sub:hover .sub{opacity:1;visibility:visible;transform:translateY(0);}
.sub a{
  display:block;padding:10px 22px;font-size:14px;color:var(--ink2);
  border-left:2px solid transparent;transition:all .18s;
}
.sub a:hover{background:var(--mist);color:var(--navy2);border-left-color:var(--accent);padding-left:26px;}
.sub a span{display:block;font-size:11.5px;color:var(--ink3);letter-spacing:.3px;}
.nav-cta{display:flex;align-items:center;gap:16px;}
.nav-tel{text-align:right;line-height:1.3;}
.nav-tel small{display:block;font-size:10.5px;color:var(--ink3);letter-spacing:1px;}
.nav-tel b{font-size:17px;color:var(--navy2);letter-spacing:.5px;}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;
  border-radius:2px;flex-direction:column;justify-content:center;align-items:center;gap:5px;
}
.burger i{display:block;width:18px;height:1.5px;background:var(--ink);transition:all .25s;}
.burger.on i:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.burger.on i:nth-child(2){opacity:0;}
.burger.on i:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

/* ---------- Hero ---------- */
.hero{
  position:relative;background:var(--navy);color:#fff;overflow:hidden;
  padding:86px 0 0;
}
.hero-bg{position:absolute;inset:0;pointer-events:none;}
.hero-bg .g1{
  position:absolute;width:900px;height:900px;right:-260px;top:-380px;border-radius:50%;
  background:radial-gradient(circle,rgba(20,120,184,.34),transparent 62%);
}
.hero-bg .g2{
  position:absolute;width:700px;height:700px;left:-240px;bottom:-320px;border-radius:50%;
  background:radial-gradient(circle,rgba(217,102,58,.14),transparent 65%);
}
.hero-bg .grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 92%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 92%);
}
.hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.06fr .94fr;gap:64px;align-items:center;padding-bottom:74px;}
.hero-tag{
  display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:2px;
  color:#9dc4da;border:1px solid rgba(255,255,255,.2);padding:6px 14px;border-radius:2px;margin-bottom:26px;
}
.hero h1{
  font-size:52px;line-height:1.24;font-weight:700;letter-spacing:-1px;color:#fff;margin-bottom:22px;
}
.hero h1 em{font-style:normal;color:#63b7e8;position:relative;}
.hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:4px;height:8px;
  background:rgba(217,102,58,.4);z-index:-1;
}
.hero p.sub{font-size:16.5px;line-height:1.9;color:#a9c6d8;max-width:520px;margin-bottom:34px;}
.hero-act{display:flex;gap:14px;flex-wrap:wrap;align-items:center;}
.hero-note{font-size:12.5px;color:#6f93a9;margin-top:18px;display:flex;align-items:center;gap:7px;}
.hero-note svg{width:14px;height:14px;}

/* 深度档案面板 */
.depth{
  background:linear-gradient(165deg,#0a3a59 0%,#061e30 100%);
  border:1px solid rgba(255,255,255,.12);border-radius:3px;
  padding:26px 26px 22px;position:relative;overflow:hidden;
  box-shadow:0 30px 60px rgba(0,0,0,.3);
}
.depth::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse 300px 160px at 80% 0%,rgba(99,183,232,.18),transparent 70%),
    radial-gradient(ellipse 240px 120px at 0% 100%,rgba(217,102,58,.12),transparent 70%);
}
.depth-head{
  position:relative;display:flex;justify-content:space-between;align-items:flex-start;
  padding-bottom:16px;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:6px;
}
.depth-head .t{font-size:12px;letter-spacing:2px;color:#7fa9c2;}
.depth-head .t b{display:block;font-size:15px;color:#fff;letter-spacing:1px;margin-top:3px;font-weight:600;}
.depth-head .c{font-size:11px;color:#5d8399;text-align:right;line-height:1.6;}
.depth-list{position:relative;padding-left:0;}
.depth-list::before{
  content:"";position:absolute;left:45px;top:12px;bottom:12px;width:1px;
  background:linear-gradient(180deg,rgba(99,183,232,.55),rgba(99,183,232,.06));
}
.d-row{
  position:relative;display:grid;grid-template-columns:45px 1fr;gap:22px;
  padding:13px 0;align-items:start;transition:background .2s;
}
.d-row .v{
  text-align:right;font-size:15px;font-weight:700;color:#63b7e8;
  font-variant-numeric:tabular-nums;letter-spacing:-.3px;padding-right:4px;position:relative;
}
.d-row .v i{font-size:10px;font-style:normal;color:#5d8399;margin-left:1px;}
.d-row .v::after{
  content:"";position:absolute;right:-4.5px;top:9px;width:7px;height:7px;border-radius:50%;
  background:#63b7e8;box-shadow:0 0 0 3px rgba(99,183,232,.16);
}
.d-row .x b{display:block;font-size:13.5px;color:#e8f2f8;font-weight:600;line-height:1.5;letter-spacing:.2px;}
.d-row .x span{display:block;font-size:11.5px;color:#7fa9c2;line-height:1.6;margin-top:2px;}
.depth-foot{
  position:relative;margin-top:14px;padding-top:14px;border-top:1px solid rgba(255,255,255,.1);
  font-size:11.5px;color:#5d8399;display:flex;justify-content:space-between;
}

/* ---------- 指标条 ---------- */
.metrics{background:#fff;border-bottom:1px solid var(--line);}
.metrics .wrap{display:grid;grid-template-columns:repeat(4,1fr);}
.metric{padding:34px 20px;border-left:1px solid var(--line);}
.metric:first-child{border-left:none;padding-left:0;}
.metric b{
  display:block;font-size:34px;font-weight:700;color:var(--navy2);
  letter-spacing:-1px;line-height:1.2;font-variant-numeric:tabular-nums;
}
.metric b i{font-size:15px;font-style:normal;font-weight:600;margin-left:3px;color:var(--ink3);}
.metric span{display:block;font-size:13px;color:var(--ink3);margin-top:4px;letter-spacing:.5px;}

/* ---------- 区块 ---------- */
.sec{padding:92px 0;}
.sec-mist{background:var(--mist);}
.sec-head{margin-bottom:48px;display:flex;justify-content:space-between;align-items:flex-end;gap:40px;}
.sec-head .l{max-width:660px;}
.sec-head p{font-size:15.5px;color:var(--ink3);margin-top:14px;line-height:1.85;}
.sec-head .r{flex:0 0 auto;padding-bottom:4px;}

/* ---------- 业务卡片 ---------- */
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.biz{
  background:#fff;padding:34px 30px 30px;position:relative;transition:all .3s var(--ease);
  display:flex;flex-direction:column;min-height:290px;
}
.biz::before{
  content:"";position:absolute;left:0;top:0;width:100%;height:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .32s var(--ease);
}
.biz:hover{background:#fbfdff;transform:translateY(-2px);box-shadow:0 16px 34px rgba(15,34,51,.07);z-index:2;}
.biz:hover::before{transform:scaleX(1);}
.biz .n{
  position:absolute;right:22px;top:18px;font-size:40px;font-weight:700;color:#eef3f8;
  letter-spacing:-2px;line-height:1;font-variant-numeric:tabular-nums;
}
.biz-ico{
  width:44px;height:44px;border-radius:2px;background:var(--blue-l);
  display:grid;place-items:center;margin-bottom:20px;transition:all .3s;
}
.biz:hover .biz-ico{background:var(--navy2);}
.biz-ico svg{width:23px;height:23px;stroke:var(--navy2);fill:none;stroke-width:1.5;transition:stroke .3s;}
.biz:hover .biz-ico svg{stroke:#fff;}
.biz h3{font-size:18.5px;font-weight:700;color:var(--ink);margin-bottom:9px;letter-spacing:.3px;}
.biz p{font-size:13.8px;line-height:1.8;color:var(--ink3);flex:1;}
.biz .tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:18px;}
.biz .tags span{
  font-size:11.5px;color:var(--ink3);background:var(--mist);padding:3px 9px;border-radius:2px;
  border:1px solid var(--line);
}
.biz .go{
  margin-top:18px;font-size:13px;color:var(--navy2);font-weight:600;display:flex;align-items:center;gap:6px;
}
.biz .go svg{width:13px;height:13px;transition:transform .28s;}
.biz:hover .go svg{transform:translateX(4px);}

/* ---------- 案例卡片 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.case{
  display:block;background:#fff;border:1px solid var(--line);border-radius:2px;overflow:hidden;
  transition:all .3s var(--ease);
}
.case:hover{transform:translateY(-3px);box-shadow:0 20px 44px rgba(15,34,51,.1);border-color:var(--line-d);}
.case-vis{
  position:relative;height:196px;overflow:hidden;
  background:linear-gradient(158deg,#0b4f7a 0%,#082f4a 60%,#061e30 100%);
}
.case-vis .strata{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse 220px 120px at 78% 6%,rgba(99,183,232,.32),transparent 68%),
    repeating-linear-gradient(168deg,rgba(255,255,255,.055) 0 1px,transparent 1px 13px);
}
.case-vis .yr{
  position:absolute;right:16px;top:12px;font-size:11px;letter-spacing:2px;color:rgba(255,255,255,.5);
  font-variant-numeric:tabular-nums;
}
.case-vis .dep{
  position:absolute;left:18px;bottom:16px;font-size:11px;color:rgba(255,255,255,.55);
  display:flex;align-items:center;gap:6px;letter-spacing:.5px;
}
.case-vis .dep i{display:block;width:14px;height:1px;background:rgba(255,255,255,.4);}
.case-vis .t{
  position:absolute;left:18px;right:18px;bottom:42px;font-size:16.5px;font-weight:700;color:#fff;
  line-height:1.55;letter-spacing:.3px;
}
.case-body{padding:18px 20px 20px;}
.case-body .meta{display:flex;flex-wrap:wrap;gap:0 14px;font-size:12px;color:var(--ink3);margin-bottom:9px;}
.case-body .meta span{display:inline-flex;align-items:center;gap:4px;}
.case-body .meta svg{width:12px;height:12px;opacity:.6;}
.case-body p{font-size:13.5px;line-height:1.75;color:var(--ink3);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.case-body .cat{
  display:inline-block;font-size:11px;color:var(--navy2);background:var(--blue-l);
  padding:2px 8px;border-radius:2px;margin-bottom:10px;letter-spacing:.5px;
}

/* ---------- 优势列表 ---------- */
.why{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border-top:1px solid var(--line);}
.why-item{background:#fff;padding:38px 34px;display:grid;grid-template-columns:auto 1fr;gap:22px;}
.why-item .n{
  font-size:13px;font-weight:700;color:var(--accent);letter-spacing:1px;
  padding-top:4px;font-variant-numeric:tabular-nums;
}
.why-item h4{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:8px;}
.why-item p{font-size:14px;line-height:1.85;color:var(--ink3);}

/* ---------- 能力/装备 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:start;}
.eq-list{border-top:1px solid var(--line);}
.eq-row{
  display:grid;grid-template-columns:1fr auto;gap:20px;padding:16px 0;
  border-bottom:1px solid var(--line);align-items:baseline;
}
.eq-row .k{font-size:15px;color:var(--ink);font-weight:600;}
.eq-row .k span{display:block;font-size:12.5px;color:var(--ink3);font-weight:400;margin-top:2px;}
.eq-row .v{font-size:13px;color:var(--ink3);text-align:right;font-variant-numeric:tabular-nums;letter-spacing:.3px;}
.cap-table{width:100%;border-collapse:collapse;font-size:14px;}
.cap-table th{
  background:var(--navy2);color:#fff;text-align:left;padding:11px 14px;font-size:12.5px;
  letter-spacing:1px;font-weight:600;
}
.cap-table td{padding:12px 14px;border-bottom:1px solid var(--line);color:var(--ink2);}
.cap-table tr:nth-child(even) td{background:#fafcfe;}
.cap-table td:last-child{text-align:right;color:var(--navy2);font-weight:600;font-variant-numeric:tabular-nums;}

/* ---------- 合作单位 ---------- */
.partners{display:flex;flex-wrap:wrap;gap:12px;}
.partners span{
  font-size:13.5px;color:var(--ink2);border:1px solid var(--line);background:#fff;
  padding:9px 16px;border-radius:2px;letter-spacing:.3px;transition:all .2s;
}
.partners span:hover{border-color:var(--blue);color:var(--navy2);background:var(--blue-l);}

/* ---------- 文章 ---------- */
.art-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.art{
  background:#fff;border:1px solid var(--line);padding:28px 26px 24px;border-radius:2px;
  transition:all .3s var(--ease);display:flex;flex-direction:column;
}
.art:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(15,34,51,.08);border-color:var(--line-d);}
.art .cat{font-size:11.5px;color:var(--accent);letter-spacing:1.5px;font-weight:700;margin-bottom:13px;}
.art h4{font-size:17px;line-height:1.6;font-weight:700;color:var(--ink);margin-bottom:10px;}
.art p{font-size:13.5px;line-height:1.8;color:var(--ink3);flex:1;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.art .ft{
  margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;font-size:12px;color:var(--ink3);
}

/* ---------- CTA / 表单 ---------- */
.cta{background:var(--navy);color:#fff;position:relative;overflow:hidden;padding:84px 0;}
.cta::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse 700px 400px at 85% 20%,rgba(20,120,184,.28),transparent 65%),
             radial-gradient(ellipse 500px 300px at 10% 90%,rgba(217,102,58,.16),transparent 65%);
}
.cta .wrap{position:relative;z-index:2;display:grid;grid-template-columns:.95fr 1.05fr;gap:70px;align-items:start;}
.cta h2{font-size:32px;line-height:1.4;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:-.2px;}
.cta p{font-size:15px;line-height:1.9;color:#a9c6d8;margin-bottom:28px;}
.cta-contacts{display:flex;flex-direction:column;gap:16px;}
.cta-contacts .row{display:flex;align-items:center;gap:14px;font-size:14px;color:#cfe3ef;}
.cta-contacts .ico{
  width:38px;height:38px;border:1px solid rgba(255,255,255,.18);border-radius:2px;
  display:grid;place-items:center;flex:0 0 auto;
}
.cta-contacts .ico svg{width:16px;height:16px;stroke:#63b7e8;fill:none;stroke-width:1.5;}
.cta-contacts b{display:block;font-size:17px;color:#fff;letter-spacing:1px;font-weight:700;}
.cta-contacts small{font-size:11.5px;color:#789bb0;letter-spacing:.5px;}

.form-panel{background:#fff;border-radius:3px;padding:32px;box-shadow:0 30px 60px rgba(0,0,0,.24);}
.form-panel h4{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:4px;}
.form-panel .hint{font-size:12.5px;color:var(--ink3);margin-bottom:22px;}
.field{margin-bottom:14px;}
.field label{display:block;font-size:12.5px;color:var(--ink2);margin-bottom:6px;font-weight:600;letter-spacing:.3px;}
.field label i{color:var(--accent);font-style:normal;}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 13px;border:1px solid var(--line-d);border-radius:2px;
  font-size:14px;color:var(--ink);background:#fff;transition:all .2s;font-family:inherit;
}
.field textarea{height:82px;padding:10px 13px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(20,120,184,.1);
}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.form-panel .btn{width:100%;margin-top:6px;}
.form-tip{font-size:11.5px;color:var(--ink3);text-align:center;margin-top:12px;line-height:1.7;}

/* ---------- 页脚 ---------- */
.footer{background:#04202f;color:#7e9aad;padding:66px 0 0;font-size:13.5px;}
.f-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:50px;padding-bottom:50px;}
.footer .logo-txt strong{color:#fff;}
.footer .logo-txt small{color:#5d7e93;}
.footer p{font-size:13px;line-height:1.95;color:#7e9aad;}
.footer h5{font-size:13px;color:#fff;letter-spacing:1.5px;margin:0 0 18px;font-weight:700;}
.f-links li{margin-bottom:9px;}
.f-links a{color:#7e9aad;transition:color .2s;font-size:13px;}
.f-links a:hover{color:#63b7e8;}
.f-contacts li{display:flex;gap:10px;margin-bottom:12px;line-height:1.7;font-size:13px;}
.f-contacts svg{width:14px;height:14px;stroke:#4d7d97;fill:none;stroke-width:1.5;flex:0 0 auto;margin-top:4px;}
.f-contacts b{color:#fff;font-weight:600;}
.f-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:22px 0;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12px;color:#5d7e93;
}
.f-bottom a:hover{color:#63b7e8;}

/* ---------- 内页头 ---------- */
.phead{
  background:var(--navy);color:#fff;padding:64px 0 56px;position:relative;overflow:hidden;
}
.phead::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse 800px 400px at 90% 0%,rgba(20,120,184,.26),transparent 62%),
             linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px) 0 0/64px 64px;
}
.phead .wrap{position:relative;z-index:2;}
.crumb{font-size:12.5px;color:#7fa9c2;margin-bottom:18px;display:flex;gap:8px;align-items:center;flex-wrap:wrap;}
.crumb a:hover{color:#fff;}
.crumb i{font-style:normal;opacity:.4;}
.phead h1{font-size:38px;line-height:1.35;font-weight:700;color:#fff;letter-spacing:-.4px;margin-bottom:14px;}
.phead .desc{font-size:15.5px;line-height:1.85;color:#a9c6d8;max-width:760px;}

/* ---------- 通用内容块 ---------- */
.blocks{padding:76px 0;}
.prose{font-size:15.5px;line-height:1.95;color:var(--ink2);}
.prose h2{font-size:23px;color:var(--ink);margin:44px 0 14px;font-weight:700;letter-spacing:.3px;}
.prose h2:first-child{margin-top:0;}
.prose h3{font-size:17.5px;color:var(--ink);margin:30px 0 10px;font-weight:700;}
.prose p{margin-bottom:16px;}
.prose ul,.prose ol{margin:0 0 18px;padding-left:22px;list-style:disc;}
.prose ol{list-style:decimal;}
.prose li{margin:7px 0;}
.prose li::marker{color:var(--blue);}
.prose strong{color:var(--ink);font-weight:700;}
.prose blockquote{
  margin:22px 0;padding:18px 22px;background:var(--mist);border-left:3px solid var(--accent);
  font-size:14.5px;color:var(--ink2);
}

/* 场景卡 */
.sc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.sc{background:#fff;padding:26px 24px;transition:background .25s;}
.sc:hover{background:#fbfdff;}
.sc .n{font-size:11px;letter-spacing:1.5px;color:var(--accent);font-weight:700;margin-bottom:10px;}
.sc h4{font-size:15.5px;font-weight:700;color:var(--ink);margin-bottom:6px;}
.sc p{font-size:13.2px;line-height:1.75;color:var(--ink3);}

/* 工艺流程 */
.steps{counter-reset:st;}
.step{
  display:grid;grid-template-columns:56px 1fr;gap:26px;padding:24px 0;
  border-bottom:1px solid var(--line);position:relative;
}
.step:last-child{border-bottom:none;}
.step .no{
  counter-increment:st;width:44px;height:44px;border:1px solid var(--line-d);border-radius:50%;
  display:grid;place-items:center;font-size:13px;font-weight:700;color:var(--navy2);
  font-variant-numeric:tabular-nums;background:#fff;
}
.step .no::before{content:counter(st,decimal-leading-zero);}
.step h4{font-size:16.5px;font-weight:700;color:var(--ink);margin-bottom:6px;}
.step p{font-size:14px;line-height:1.85;color:var(--ink3);}

/* FAQ */
.faq{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:none;text-align:left;padding:22px 44px 22px 0;
  font-size:15.5px;font-weight:600;color:var(--ink);position:relative;line-height:1.7;
  transition:color .2s;
}
.faq-q:hover{color:var(--navy2);}
.faq-q::after{
  content:"";position:absolute;right:8px;top:50%;width:12px;height:12px;
  border-right:1.5px solid var(--ink3);border-bottom:1.5px solid var(--ink3);
  transform:translateY(-70%) rotate(45deg);transition:transform .3s var(--ease);
}
.faq-item.on .faq-q::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--blue);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s var(--ease);}
.faq-a div{padding:0 40px 22px 0;font-size:14px;line-height:1.9;color:var(--ink3);}

/* 筛选 */
.filters{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:38px;padding-bottom:22px;border-bottom:1px solid var(--line);}
.filters button{
  border:1px solid var(--line-d);background:#fff;color:var(--ink2);height:38px;padding:0 18px;
  border-radius:2px;font-size:13.5px;transition:all .22s;letter-spacing:.3px;
}
.filters button:hover{border-color:var(--blue);color:var(--navy2);}
.filters button.on{background:var(--navy2);border-color:var(--navy2);color:#fff;}

/* 案例详情信息栏 */
.info-bar{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);margin:0 0 40px;
}
.info-bar .cell{background:#fff;padding:18px 20px;}
.info-bar .k{font-size:11.5px;color:var(--ink3);letter-spacing:1px;margin-bottom:4px;}
.info-bar .v{font-size:14.5px;color:var(--ink);font-weight:600;line-height:1.6;}

/* 联系页 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
.c-item{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line);}
.c-item .ico{
  width:42px;height:42px;border-radius:2px;background:var(--blue-l);display:grid;place-items:center;flex:0 0 auto;
}
.c-item .ico svg{width:18px;height:18px;stroke:var(--navy2);fill:none;stroke-width:1.5;}
.c-item .k{font-size:12px;color:var(--ink3);letter-spacing:1px;margin-bottom:3px;}
.c-item .v{font-size:16px;color:var(--ink);font-weight:600;line-height:1.6;}
.c-item .v small{display:block;font-size:12.5px;color:var(--ink3);font-weight:400;margin-top:3px;}

/* 深度统计小卡 */
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:36px 0;}
.stat{background:var(--mist);border:1px solid var(--line);padding:20px 22px;border-radius:2px;}
.stat b{display:block;font-size:26px;color:var(--navy2);font-weight:700;letter-spacing:-.5px;}
.stat span{font-size:12.5px;color:var(--ink3);}

/* 侧栏文章 */
.art-layout{display:grid;grid-template-columns:1fr 300px;gap:60px;align-items:start;}
.side-card{border:1px solid var(--line);padding:24px;border-radius:2px;background:#fbfdff;}
.side-card h4{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:16px;letter-spacing:.5px;}
.side-card ul li{border-bottom:1px dashed var(--line);padding:11px 0;font-size:13.5px;line-height:1.7;}
.side-card ul li:last-child{border-bottom:none;}
.side-card a:hover{color:var(--navy2);}
.side-card .d{display:block;font-size:11.5px;color:var(--ink3);margin-top:3px;}

/* 提示条 */
.notice{
  border-left:3px solid var(--accent);background:var(--accent-l);padding:16px 20px;
  font-size:13.5px;line-height:1.85;color:#8a4a2c;margin:26px 0;border-radius:0 2px 2px 0;
}
.notice b{color:#a43a10;}

/* 相关业务横排 */
.rel{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.rel a{
  border:1px solid var(--line);padding:20px 22px;display:flex;justify-content:space-between;
  align-items:center;gap:12px;font-size:14.5px;font-weight:600;color:var(--ink);
  transition:all .25s;background:#fff;
}
.rel a:hover{border-color:var(--blue);color:var(--navy2);background:var(--blue-l);}
.rel a svg{width:14px;height:14px;flex:0 0 auto;opacity:.6;}

/* 动画 */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .hero .wrap{grid-template-columns:1fr;gap:48px;}
  .hero h1{font-size:42px;}
  .biz-grid{grid-template-columns:repeat(2,1fr);}
  .case-grid,.art-grid{grid-template-columns:repeat(2,1fr);}
  .cta .wrap{grid-template-columns:1fr;gap:44px;}
  .f-grid{grid-template-columns:1fr 1fr;gap:40px;}
  .split{grid-template-columns:1fr;gap:44px;}
  .art-layout{grid-template-columns:1fr;gap:44px;}
}
@media (max-width:900px){
  .topbar{display:none;}
  .nav{
    position:fixed;inset:76px 0 auto 0;background:#fff;flex-direction:column;
    align-items:stretch;padding:12px 24px 28px;border-bottom:1px solid var(--line);
    box-shadow:0 20px 40px rgba(15,34,51,.12);display:none;max-height:calc(100vh - 76px);overflow:auto;
  }
  .nav.open{display:flex;}
  .nav>li>a{line-height:1.5;padding:15px 0;border-bottom:1px solid var(--line);}
  .nav>li>a::after{display:none;}
  .nav .has-sub>a::before{right:6px;top:24px;}
  .sub{
    position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;
    border:none;border-top:none;padding:0 0 8px;min-width:0;display:none;
  }
  .nav .has-sub.open .sub{display:block;}
  .sub a{padding:10px 12px;font-size:13.5px;}
  .burger{display:flex;}
  .nav-tel{display:none;}
  .nav-cta .btn{height:42px;padding:0 16px;font-size:13.5px;}
  .header .wrap{height:70px;}
  .nav{top:70px;}
  .metrics .wrap{grid-template-columns:1fr 1fr;}
  .metric{border-left:none;border-top:1px solid var(--line);padding:24px 0;}
  .metric:nth-child(odd){padding-right:20px;}
  .metric:nth-child(even){padding-left:20px;border-left:1px solid var(--line);}
  .metric:first-child,.metric:nth-child(2){border-top:none;}
  .sec{padding:64px 0;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:20px;}
  h1.big{font-size:34px;}
  h2.big{font-size:26px;}
  .hero h1{font-size:34px;}
  .hero{padding-top:56px;}
  .hero p.sub{font-size:15px;}
  .why{grid-template-columns:1fr;}
  .info-bar{grid-template-columns:1fr 1fr;}
  .sc-grid{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;gap:40px;}
  .blocks{padding:52px 0;}
  .wrap,.wrap-nar{padding:0 22px;}
  .rel{grid-template-columns:1fr;}
  .phead h1{font-size:28px;}
  .phead{padding:44px 0 40px;}
}
@media (max-width:640px){
  .biz-grid{grid-template-columns:1fr;}
  .case-grid,.art-grid{grid-template-columns:1fr;}
  .f-grid{grid-template-columns:1fr;gap:34px;}
  .hero h1{font-size:29px;}
  .btn{height:46px;padding:0 20px;font-size:14px;}
  .hero-act{width:100%;}
  .hero-act .btn{flex:1;}
  .depth{padding:20px 18px;}
  .d-row{grid-template-columns:40px 1fr;gap:16px;}
  .depth-list::before{left:40px;}
  .field-row{grid-template-columns:1fr;}
  .form-panel{padding:24px 20px;}
  .stat-row{grid-template-columns:1fr;}
  .info-bar{grid-template-columns:1fr;}
  .metric b{font-size:28px;}
}