:root{
  --brand:#0E2A52;
  --brand-600:#143a6b;
  --brand-700:#0b2244;
  --blue:#1E6FE0;
  --blue-soft:#E8F1FD;
  --teal:#00B8A0;
  --teal-soft:#E1F7F3;
  --ink:#1A2233;
  --muted:#5B6678;
  --line:#E6EAF0;
  --bg:#FFFFFF;
  --bg-soft:#F4F7FB;
  --bg-dark:#0B1F3A;
  --warn:#E4572E;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 6px 24px rgba(14,42,82,.08);
  --shadow-lg:0 18px 50px rgba(14,42,82,.16);
  --maxw:1180px;
  --header-h:64px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px;
  -webkit-text-size-adjust:100%;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section.soft{background:var(--bg-soft)}
.section.dark{background:var(--bg-dark);color:#fff}
.section-head{text-align:center;max-width:760px;margin:0 auto 44px}
.section-head .kicker{display:inline-block;color:var(--blue);font-weight:700;letter-spacing:.08em;font-size:12px;text-transform:uppercase;background:var(--blue-soft);padding:6px 12px;border-radius:999px;margin-bottom:10px}
.section-head h2{font-size:30px;margin:10px 0 12px;letter-spacing:-.01em}
.section-head p{color:var(--muted);font-size:16px}
.dark .section-head p{color:#A9B6CC}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.2s;min-height:44px;box-shadow:0 4px 14px rgba(30,111,224,.18)}
.btn-primary{background:linear-gradient(135deg,var(--blue) 0%,#0b5ed7 100%);color:#fff}
.btn-primary:hover{background:linear-gradient(135deg,#1659bd 0%,#094bb5 100%);transform:translateY(-1px);box-shadow:0 8px 22px rgba(30,111,224,.28)}
.btn-ghost{background:transparent;color:var(--brand);border-color:var(--line);box-shadow:none}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-soft)}
.dark .btn-ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.dark .btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-light{background:#fff;color:var(--brand);box-shadow:0 4px 14px rgba(0,0,0,.12)}
.btn-light:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(0,0,0,.18)}
.btn svg{width:18px;height:18px}

/* ---------- Header ---------- */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--brand);letter-spacing:.02em}
.brand .mark{display:flex;align-items:center;flex:0 0 auto;overflow:hidden;border-radius:6px;line-height:0;box-shadow:0 2px 6px rgba(0,0,0,.08)}
.brand .mark img{height:32px;width:auto;max-width:170px;object-fit:contain;display:block}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{padding:9px 14px;border-radius:8px;font-size:15px;color:var(--ink);font-weight:500;transition:.15s}
.nav-links a:hover{background:var(--bg-soft);color:var(--blue)}
.nav-links a.active{color:var(--blue)}
.nav-cta{margin-left:8px}
.burger{display:none;background:none;border:0;cursor:pointer;padding:8px}
.burger svg{width:26px;height:26px;stroke:var(--brand)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#0b2244 0%,#0E2A52 45%,#103a6e 100%);color:#fff;padding:84px 0 92px}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:60px 60px;pointer-events:none}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(700px 360px at 82% 12%,rgba(0,184,160,.28),transparent 60%),radial-gradient(560px 320px at 8% 90%,rgba(30,111,224,.25),transparent 60%);pointer-events:none}
.hero .wrap{position:relative;z-index:1}
.hero .tag{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);padding:7px 14px;border-radius:999px;font-size:13px;color:#cfe0ff;margin-bottom:18px}
.hero h1{font-size:44px;line-height:1.18;letter-spacing:-.02em;margin-bottom:18px;font-weight:800;text-shadow:0 2px 20px rgba(0,0,0,.2)}
.hero h1 .hl{color:var(--teal)}
.hero p.lead{font-size:18px;color:#C7D4E8;max-width:680px;margin-bottom:30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap;margin-top:46px}
.hero-stats .s b{display:block;font-size:30px;font-weight:800;color:#fff}
.hero-stats .s span{font-size:13px;color:#9fb2cf}

/* ---------- Grid / Cards ---------- */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.22s}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);border-color:#d0d9e6}
.card .ico{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;background:var(--blue-soft);color:var(--brand);margin-bottom:16px;overflow:hidden;transition:.25s}
.card:hover .ico{transform:translateY(-3px)}
.card .ico .ic{width:28px;height:28px}
.card .ico img{width:100%;height:100%;object-fit:cover}
/* 统一线性图标（iconfont 风格：统一尺寸 / 颜色 / 圆角端点，体积轻、风格一致） */
.ic{display:block;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.wall .cell .ic{width:26px;height:26px;color:var(--brand)}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14.5px}
.card .tags{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px}
.card .tags span{font-size:12px;background:var(--bg-soft);color:var(--muted);padding:4px 10px;border-radius:999px}
.dark .card{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.1)}
.dark .card .ico{background:rgba(0,184,160,.16);color:var(--teal)}
.dark .card p{color:#A9B6CC}

/* ---------- Stats band ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.stats .s{display:flex;flex-direction:column;align-items:center;justify-content:center}
.stats .b{font-size:34px;font-weight:800;color:var(--blue);line-height:1.1}
.stats .l{font-size:14px;color:var(--muted);margin-top:6px}
.dark .stats .l{color:#A9B6CC}

/* ---------- Pillars (home business lines) ---------- */
.pillar{display:flex;gap:18px;align-items:flex-start}
.pillar .num{font-size:15px;font-weight:800;color:var(--teal);background:var(--teal-soft);width:38px;height:38px;border-radius:10px;display:grid;place-items:center;flex:0 0 auto}
.pillar h3{font-size:18px;margin-bottom:6px}
.pillar p{color:var(--muted);font-size:14.5px}

/* ---------- Logo / cert wall ---------- */
.wall{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.wall .cell{background:#fff;border:1px solid var(--line);border-radius:12px;height:84px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;text-align:center;padding:8px}
.wall .cell svg{width:26px;height:26px;color:var(--brand)}
.wall .cell img{width:28px;height:28px;object-fit:contain}
.wall .cell span{font-size:12px;color:var(--muted);line-height:1.3}

/* ---------- Client map ---------- */
.client-card{text-align:center;display:flex;flex-direction:column;align-items:center}
.client-logo{height:88px;display:flex;align-items:center;justify-content:center;margin-bottom:14px;padding:14px 18px;width:100%;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.2s}
.client-card:hover .client-logo{border-color:#cfe0ef;box-shadow:var(--shadow)}
.client-logo img{max-height:52px;max-width:150px;width:auto;object-fit:contain}
.dark .client-logo{background:#fff;border-color:#33415c}
.dark .client-logo img{filter:none}

/* ---------- Case ---------- */
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;gap:14px;transition:.22s}
.case:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);border-color:#d0d9e6}
.case .ind{font-size:12px;font-weight:700;color:var(--teal);letter-spacing:.06em}
.case h3{font-size:18px}
.case p{color:var(--muted);font-size:14.5px}
.case .metrics{display:flex;gap:18px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line)}
.case .metrics .m b{display:block;font-size:22px;color:var(--blue);font-weight:800}
.case .metrics .m span{font-size:12px;color:var(--muted)}

/* ---------- Timeline / History path ---------- */
.history-path{width:100%;height:auto;display:block;margin:6px 0 28px;overflow:visible}
.history-path .node-label{font-weight:800;fill:var(--blue);font-size:15px}
.history-path .node-sub{font-weight:600;fill:var(--muted);font-size:11px}
.timeline{display:grid;grid-template-columns:repeat(auto-fit,minmax(186px,1fr));gap:18px}
.tl{position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 20px 20px;transition:.22s}
.tl::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#3b82f6,#14b8a6)}
.tl:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#d0d9e6}
.tl .y{font-weight:800;color:var(--blue);font-size:19px}
.tl h4{font-size:15px;margin:6px 0 8px}
.tl p{font-size:13.5px;color:var(--muted);line-height:1.6}

/* ---------- Spec table ---------- */
.spec{width:100%;border-collapse:collapse;font-size:14.5px}
.spec th,.spec td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line)}
.spec th{background:var(--bg-soft);font-weight:700;color:var(--brand);width:34%}
.spec tr:last-child td,.spec tr:last-child th{border-bottom:0}

/* ---------- Pros/cons ---------- */
.pc{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.pc .col{border-radius:14px;padding:24px}
.pc .bad{background:#FDEEE9;border:1px solid #F6D6C9}
.pc .good{background:var(--teal-soft);border:1px solid #BDE9E1}
.pc h4{margin-bottom:12px;font-size:16px}
.pc ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.pc li{display:flex;gap:10px;font-size:14.5px;color:var(--ink)}
.pc li svg{width:18px;height:18px;flex:0 0 auto;margin-top:3px}
.pc .bad li svg{color:var(--warn)}
.pc .good li svg{color:var(--teal)}

/* ---------- Contact form ---------- */
.form{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form .full{grid-column:1/-1}
.form label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--brand)}
.form input,.form textarea,.form select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:16px;font-family:inherit;background:#fff;color:var(--ink)}
.form input:focus,.form textarea:focus{border-color:var(--blue);outline:none}
.form textarea{resize:vertical;min-height:110px}
.form .note{grid-column:1/-1;font-size:13px;color:var(--muted)}
.ok{display:none;background:var(--teal-soft);border:1px solid #BDE9E1;color:#0a7d6c;padding:14px 16px;border-radius:12px;font-size:14.5px;margin-top:14px}
.ok.show{display:block}

/* ---------- Footer ---------- */
.footer{background:var(--bg-dark);color:#C7D4E8;padding:54px 0 26px}
.footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.footer h5{color:#fff;font-size:14px;margin-bottom:14px;letter-spacing:.04em}
.footer a{display:block;color:#A9B6CC;font-size:14px;padding:5px 0}
.footer a:hover{color:#fff}
.footer .about{font-size:14px;line-height:1.7}
.footer .about .brand{color:#fff;margin-bottom:12px;gap:10px}
.footer .about .brand .mark{display:flex;align-items:center;flex:0 0 auto;overflow:hidden;border-radius:6px;line-height:0;box-shadow:0 2px 6px rgba(0,0,0,.12)}
.footer .about .brand .mark img{height:28px;width:auto;max-width:150px;object-fit:contain;display:block}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding-top:18px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:#8FA0BD}
.footer-bottom a{display:inline;color:#8FA0BD}
.footer-bottom a:hover{color:#fff}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:.6s}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:920px){
  .grid-4,.wall{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr);gap:26px}
  .footer .cols{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav-links{position:fixed;inset:var(--header-h) 0 auto 0;background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:10px 16px 20px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 8px;border-radius:0;border-bottom:1px solid var(--line)}
  .nav-links a.active{background:var(--bg-soft)}
  .nav-cta{margin:12px 0 0}
  .burger{display:block}
  .hero h1{font-size:32px}
  .hero p.lead{font-size:16px}
  .section{padding:54px 0}
  .section-head h2{font-size:25px}
  .grid-3,.grid-2,.pc,.form{grid-template-columns:1fr}
  .hero-stats{gap:22px}
  .footer .cols{grid-template-columns:1fr}
  .spec th{width:42%}
}