/* ============================================================
   可信身份认证平台（CTID 电子身份证）产品详情页 样式
   ============================================================ */
:root{
  --navy:#0b1f3a;
  --navy-2:#12294e;
  --blue:#1e56d0;
  --blue-2:#2e6be6;
  --blue-3:#4c86ff;
  --green:#37a96c;
  --amber:#e0a62e;
  --red:#e0292b;
  --bg:#f4f7fc;
  --bg-2:#eef4ff;
  --surface:#ffffff;
  --text:#1c2b3a;
  --muted:#5b6b82;
  --line:#e3eaf5;
  --shadow:0 10px 30px rgba(18,41,78,.08);
  --shadow-lg:0 20px 50px rgba(18,41,78,.12);
  --radius:16px;
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  color:var(--text);
  background:var(--surface);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.sec{padding:84px 0}
.sec-alt{background:var(--bg)}

/* ---------- header ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.9);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px}
.brand .mark{
  width:38px;height:38px;border-radius:10px;
  background:linear-gradient(135deg,var(--blue-2),var(--blue));
  display:flex;align-items:center;justify-content:center;flex:none;
}
.brand .mark svg{width:22px;height:22px}
.brand .name{font-size:17px;font-weight:700;color:var(--navy);letter-spacing:.3px}
.brand .name small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:1px}
.nav{display:flex;gap:30px;align-items:center}
.nav a{font-size:15px;color:#3b4c66;font-weight:500;transition:color .2s}
.nav a:hover{color:var(--blue)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(900px 480px at 82% 20%,rgba(46,107,230,.42),transparent 60%),
    radial-gradient(700px 420px at 12% 88%,rgba(30,86,208,.30),transparent 60%),
    linear-gradient(135deg,#12294e,#0b1f3a 55%,#0a1729);
}
.hero .wrap{
  display:grid;grid-template-columns:1.12fr .95fr;gap:56px;align-items:center;
  padding-top:84px;padding-bottom:64px;
}
.hero .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:2px;color:#bcd0f5;
  border:1px solid rgba(188,208,245,.4);border-radius:999px;padding:7px 16px;margin-bottom:26px;
  background:rgba(255,255,255,.06);
}
.hero h1{font-size:46px;line-height:1.22;font-weight:800;letter-spacing:.5px;color:#fff}
.hero h1 .hl{color:#7eb6ff}
.hero .lead{margin:24px 0 30px;font-size:18px;line-height:1.9;color:#cfe0ff;max-width:560px}
.hero .cta{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:12px;font-size:16px;font-weight:600;
  cursor:pointer;transition:transform .15s,box-shadow .2s,background .2s;
}
.btn-primary{background:var(--blue-2);color:#fff;box-shadow:0 8px 22px rgba(46,107,230,.35)}
.btn-primary:hover{background:var(--blue);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.08);color:#e9f1ff;border:1px solid rgba(188,208,245,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}
.hero .meta{margin-top:34px;display:flex;gap:34px;flex-wrap:wrap;color:#bcd0f5;font-size:14px}
.hero .meta b{color:#fff;font-size:15px}
.hero .visual{position:relative;display:flex;align-items:center;justify-content:center}
.hero .visual img{border-radius:24px;box-shadow:0 30px 70px rgba(0,0,0,.42);max-width:100%}

/* ---------- stats band ---------- */
.stats{background:var(--surface);border-bottom:1px solid var(--line)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;padding:40px 28px}
.stat{
  text-align:center;padding:18px 12px;border-radius:14px;
  background:linear-gradient(180deg,#f7faff,#eef4ff);
  border:1px solid var(--line);
}
.stat .num{font-size:34px;font-weight:800;color:var(--blue);line-height:1.1}
.stat .num small{font-size:16px;font-weight:700}
.stat .lbl{font-size:13px;color:var(--muted);margin-top:4px}

/* ---------- section head ---------- */
.sec-head{max-width:820px;margin:0 auto 52px;text-align:center}
.sec-head .tag{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:2px;color:var(--blue);
  border:1px solid #cdddf8;background:var(--bg-2);border-radius:999px;padding:6px 16px;margin-bottom:16px;
}
.sec-head h2{font-size:36px;font-weight:800;color:var(--navy);letter-spacing:.5px}
.sec-head p{margin-top:14px;font-size:17px;color:var(--muted)}
.sec-left .sec-head{text-align:left;margin-left:0}

/* ---------- intro ---------- */
.intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.problem .card{
  display:flex;gap:16px;padding:22px 24px;border-radius:14px;background:var(--surface);
  border:1px solid var(--line);box-shadow:var(--shadow);margin-bottom:16px;
}
.problem .ic{width:44px;height:44px;border-radius:12px;flex:none;display:flex;align-items:center;justify-content:center}
.problem .ic svg{width:24px;height:24px}
.problem h3{font-size:18px;font-weight:700;color:var(--navy);margin-bottom:6px}
.problem p{font-size:15px;color:var(--muted)}
.pain-1 .ic{background:#fdeaea}
.pain-2 .ic{background:#fff5e0}
.pain-3 .ic{background:#eaf1fd}
.pain-4 .ic{background:#eaf8f0}
.solution{
  background:linear-gradient(160deg,#1c56c9,#12294e);color:#fff;border-radius:22px;
  padding:38px;box-shadow:var(--shadow-lg);position:relative;overflow:hidden;
}
.solution::after{content:"";position:absolute;inset:0;background:radial-gradient(400px 260px at 100% 0,rgba(126,182,255,.35),transparent 60%)}
.solution h3{font-size:24px;font-weight:800;color:#fff;position:relative;z-index:1;margin-bottom:14px}
.solution p{font-size:15px;line-height:1.9;color:#dce8ff;position:relative;z-index:1}
.solution .key{margin-top:22px;display:flex;gap:10px;flex-wrap:wrap;position:relative;z-index:1}
.solution .key span{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);
  color:#e9f1ff;border-radius:999px;padding:7px 15px;font-size:13px}

/* ---------- image feature ---------- */
.imgfeature{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:34px;box-shadow:var(--shadow)}
.imgfeature img{width:100%;border-radius:12px;background:#fff}

/* ---------- function cards ---------- */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:18px;
  padding:30px 28px;transition:transform .25s,box-shadow .25s,border-color .25s;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:#cdddf8}
.card .num{font-size:13px;font-weight:700;color:var(--blue);letter-spacing:1px}
.card .ic{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.card .ic svg{width:28px;height:28px}
.card h3{font-size:19px;font-weight:700;color:var(--navy);margin-bottom:10px}
.card p{font-size:15px;color:var(--muted)}
.card ul{margin-top:12px;list-style:none}
.card ul li{font-size:14px;color:var(--muted);padding-left:20px;position:relative;margin-bottom:7px}
.card ul li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;background:var(--blue-3)}

/* ---------- architecture 2 col ---------- */
.arch{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:stretch}
.arch .imgfeature{display:flex;flex-direction:column;justify-content:center}
.arch .imgfeature img{border:1px solid var(--line)}

/* ---------- principles ('四不' / 特性) ---------- */
.prin{border-radius:18px;border:1px solid var(--line);background:var(--surface);padding:26px 24px;box-shadow:var(--shadow)}
.prin .head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.prin .tagbox{width:46px;height:46px;border-radius:12px;background:var(--blue-2);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;flex:none}
.prin h4{font-size:18px;font-weight:700;color:var(--navy)}
.prin p{font-size:15px;color:var(--muted)}

/* ---------- feature pills (五维) ---------- */
.five{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.five .pill{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px 18px;text-align:center;box-shadow:var(--shadow)}
.five .pill .dot{width:40px;height:40px;border-radius:50%;margin:0 auto 12px;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800;color:#fff}
.five .pill h4{font-size:16px;font-weight:700;color:var(--navy);margin-bottom:8px}
.five .pill p{font-size:13px;color:var(--muted)}

/* ---------- applications ---------- */
.app-list{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:44px}
.app{
  display:flex;gap:18px;padding:26px;background:var(--surface);border:1px solid var(--line);
  border-radius:18px;box-shadow:var(--shadow);
}
.app .ic{width:56px;height:56px;border-radius:14px;flex:none;display:flex;align-items:center;justify-content:center}
.app .ic svg{width:30px;height:30px}
.app h3{font-size:19px;font-weight:700;color:var(--navy);margin-bottom:8px}
.app p{font-size:15px;color:var(--muted)}
.app .scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.app .scene-tags span{font-size:12.5px;color:var(--blue);background:var(--bg-2);border:1px solid #d5e2fa;border-radius:999px;padding:4px 12px}
.app.wide{grid-column:1 / -1}

/* ---------- testimonial / industry band ---------- */
.band{background:linear-gradient(120deg,#12294e,#1e56d0);color:#fff;border-radius:22px;padding:44px 48px;margin-top:0}
.band .wrap-c{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:24px}
.band h3{font-size:28px;font-weight:800;color:#fff}
.band p{color:#dce8ff;font-size:15px;margin-top:8px;max-width:640px}

/* ---------- contact / cta ---------- */
.contact{background:var(--bg)}
.contact .grid-2{gap:40px;align-items:center}
.contact .info h2{font-size:34px;font-weight:800;color:var(--navy);margin-bottom:16px}
.contact .info p{font-size:17px;color:var(--muted);margin-bottom:28px;max-width:520px}
.contact .rows{display:grid;gap:14px}
.contact .row{display:flex;gap:16px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px 22px;box-shadow:var(--shadow)}
.contact .row .ic{width:44px;height:44px;border-radius:12px;flex:none;display:flex;align-items:center;justify-content:center}
.contact .row .ic svg{width:22px;height:22px}
.contact .row .t{font-size:13px;color:var(--muted)}
.contact .row .v{font-size:16px;font-weight:600;color:var(--navy);margin-top:2px}
.cta-card{
  background:linear-gradient(160deg,#2e6be6,#12294e);color:#fff;border-radius:24px;
  padding:42px;text-align:center;box-shadow:var(--shadow-lg);
}
.cta-card h3{font-size:24px;font-weight:800;color:#fff;margin-bottom:10px}
.cta-card p{color:#dce8ff;font-size:15px;margin-bottom:24px}
.cta-card .btn-primary{background:#fff;color:var(--blue)}
.cta-card .btn-primary:hover{background:#e9f1ff}
.cta-card .tel{font-size:26px;font-weight:800;color:#fff;letter-spacing:1px}

/* ---------- footer ---------- */
.footer{background:#0a1729;color:#9fb2cf;padding:44px 0 30px}
.footer .wrap{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:40px}
.footer h5{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
.footer p,.footer a{font-size:14px;color:#9fb2cf;line-height:1.9;display:block}
.footer a:hover{color:#fff}
.footer .brand .name{color:#fff}
.footer .icp{margin-top:8px;font-size:13px;color:#74879e}
.copyright{border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding-top:20px;text-align:center;font-size:13px;color:#6b7d97}
.copyright a{font-size:13px}

/* ---------- responsive ---------- */
@media(max-width:1024px){
  .hero .wrap{grid-template-columns:1fr;gap:36px;padding-top:54px}
  .hero h1{font-size:38px}
  .intro-grid,.arch,.contact .grid-2{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr 1fr}
  .five{grid-template-columns:repeat(3,1fr)}
  .app-list{grid-template-columns:1fr}
}
@media(max-width:680px){
  .nav{display:none}
  .hero h1{font-size:32px}
  .grid-3,.grid-2,.five,.stats .wrap,.footer .wrap,.app-list{grid-template-columns:1fr}
  .sec{padding:56px 0}
  .sec-head h2{font-size:28px}
  .stats .wrap{grid-template-columns:1fr 1fr}
  .app.wide{grid-column:auto}
  .band{padding:32px}
  .cta-card{padding:34px}
}