/* XAC Communications · site.css */
:root{
  --navy:#0A1826; --navy2:#10263C; --navy3:#183655;
  --gold:#C8A96A; --gold-d:#B4944F;
  --ink:#0E1A28; --line:#E3E9F2; --muted:#5C6B80;
  --paper:#FFFFFF; --paper2:#F6F8FB;
  --max:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  color:var(--ink); background:var(--paper); line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,.brand{font-family:'Montserrat','Inter',sans-serif;line-height:1.18;letter-spacing:-.01em}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}
.eyebrow{font-family:'Montserrat',sans-serif;font-size:12px;font-weight:700;letter-spacing:.18em;
  text-transform:uppercase;color:var(--gold)}

/* ── header ── */
.site-head{position:sticky;top:0;z-index:50;background:rgba(10,24,38,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;height:76px}
.site-head img.logo{height:38px;width:auto}
.nav{display:flex;gap:34px;align-items:center}
.nav a{color:#D7DFEA;font-size:14.5px;font-weight:500;letter-spacing:.01em;transition:color .2s}
.nav a:hover,.nav a.on{color:#fff}
.nav a.cta{background:var(--gold);color:#14202E;padding:10px 20px;border-radius:4px;font-weight:700;font-size:13.5px}
.nav a.cta:hover{background:#D9BC80;color:#14202E}
@media(max-width:860px){.nav{gap:18px}.nav a:not(.cta){display:none}}

/* ── hero ── */
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 55%,var(--navy3) 100%);
  color:#EAF0F7;position:relative;overflow:hidden;padding:92px 0 104px}
.hero:after{content:"";position:absolute;inset:0;background:
  radial-gradient(900px 420px at 78% 12%,rgba(200,169,106,.16),transparent 70%);pointer-events:none}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(27px,3.1vw,42px);font-weight:800;color:#fff;margin:14px 0 0;max-width:17em}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero p.lead{margin-top:20px;font-size:17.5px;color:#B9C6D6;max-width:33em}
.hero .btns{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:9px;padding:14px 26px;border-radius:4px;
  font-weight:600;font-size:15px;transition:.2s}
.btn-gold{background:var(--gold);color:#14202E}
.btn-gold:hover{background:#D9BC80;transform:translateY(-1px)}
.btn-ghost{border:1px solid rgba(255,255,255,.28);color:#EAF0F7}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}
.hero-art{position:relative;display:flex;align-items:center;justify-content:center}
.hero-art img{width:100%;height:auto;object-fit:contain}
@media(max-width:900px){.hero .wrap{grid-template-columns:1fr}.hero-art{height:300px;margin-top:34px}}

/* ── strips ── */
.strip{background:var(--paper2);border-bottom:1px solid var(--line)}
.strip .wrap{display:flex;flex-wrap:wrap;gap:12px 44px;justify-content:center;padding:18px 28px}
.strip span{font-size:13px;color:var(--muted);letter-spacing:.02em}
.strip b{color:var(--ink);font-weight:600}

/* ── sections ── */
section{padding:88px 0}
.sec-head{max-width:720px;margin-bottom:46px}
.sec-head h2{font-size:clamp(24px,2.6vw,34px);font-weight:800;margin-top:10px}
.sec-head p{margin-top:14px;color:var(--muted);font-size:16px}

/* ── products grid ── */
.grid-7{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:1040px){.grid-7{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){.grid-7{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.grid-7{grid-template-columns:1fr}}
.pcard{border:1px solid var(--line);border-radius:6px;padding:24px 22px;background:#fff;
  transition:.22s;display:flex;flex-direction:column;min-height:172px}
.pcard:hover{border-color:#C9D4E4;box-shadow:0 14px 34px rgba(14,26,40,.09);transform:translateY(-2px)}
.pcard .ic{width:40px;height:40px;margin-bottom:14px;color:var(--navy3)}
.pcard h3{font-size:16.5px;font-weight:700;letter-spacing:-.005em}
.pcard p{margin-top:8px;font-size:13.5px;color:var(--muted);line-height:1.55}
.pcard .go{margin-top:auto;padding-top:14px;font-size:12.5px;font-weight:700;color:var(--gold-d);
  letter-spacing:.06em;text-transform:uppercase}

/* ── services ── */
.svc{background:var(--navy);color:#E7EDF5}
.svc .sec-head p{color:#A9B8CA}
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px}
@media(max-width:900px){.svc-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.svc-grid{grid-template-columns:1fr}}
.svc-item .n{font-family:'Montserrat',sans-serif;font-size:13px;font-weight:800;color:var(--gold);letter-spacing:.14em}
.svc-item h3{font-size:17px;margin-top:10px;color:#fff}
.svc-item p{margin-top:10px;font-size:14px;color:#A9B8CA}

/* ── honest band ── */
.honest{background:linear-gradient(135deg,#0C1D30,#15304C);color:#E7EDF5}
.honest .wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
@media(max-width:860px){.honest .wrap{grid-template-columns:1fr}}
.honest h2{font-size:clamp(22px,2.4vw,30px);color:#fff;font-weight:800}
.honest p{margin-top:16px;color:#B9C6D6;font-size:15.5px}
.quote{border-left:3px solid var(--gold);padding-left:22px;font-size:18px;color:#fff;
  font-family:'Montserrat',sans-serif;font-weight:600;line-height:1.5}

/* ── cta ── */
.cta-band{background:var(--gold);padding:56px 0}
.cta-band .wrap{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(21px,2.3vw,28px);color:#14202E;font-weight:800}
.cta-band p{color:#4A3F23;margin-top:6px;font-size:15px}
.btn-navy{background:#14202E;color:#fff}
.btn-navy:hover{background:#0A1826;transform:translateY(-1px)}

/* ── footer ── */
footer{background:var(--navy);color:#93A3B6;padding:64px 0 30px;font-size:13.5px}
.f-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
@media(max-width:820px){.f-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.f-grid{grid-template-columns:1fr}}
footer img.logo{height:34px;margin-bottom:16px}
footer h4{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:#fff;
  font-family:'Montserrat',sans-serif;margin-bottom:14px}
footer a:hover{color:var(--gold)}
footer ul{list-style:none;display:grid;gap:9px}
.f-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:44px;padding-top:22px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:#7E8FA3}

/* ── inner pages ── */
.page-head{background:linear-gradient(135deg,var(--navy),var(--navy3));color:#fff;padding:74px 0 64px}
.page-head h1{font-size:clamp(26px,3.2vw,40px);font-weight:800}
.page-head p{margin-top:14px;color:#B9C6D6;max-width:44em}
.prod-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:56px 0;border-bottom:1px solid var(--line)}
.prod-row:nth-child(even) .txt{order:2}
@media(max-width:820px){.prod-row{grid-template-columns:1fr;gap:28px}.prod-row:nth-child(even) .txt{order:0}}
.prod-row h2{font-size:24px;font-weight:800}
.prod-row .specs{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.prod-row .specs span{font-size:12.5px;background:var(--paper2);border:1px solid var(--line);
  padding:6px 11px;border-radius:3px;color:var(--muted)}
.prod-row .shot{background:var(--paper2);border-radius:8px;padding:28px;display:grid;place-items:center;min-height:260px}
.prod-row .shot img{max-height:250px;max-width:100%;object-fit:contain}
.prod-row p.desc{margin-top:14px;color:var(--muted);font-size:15px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:56px}
@media(max-width:820px){.two-col{grid-template-columns:1fr}}
.kv{display:grid;gap:16px;margin-top:22px}
.kv div{display:grid;grid-template-columns:150px 1fr;gap:16px;font-size:15px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.kv b{color:var(--muted);font-weight:600;font-size:13px;letter-spacing:.03em;text-transform:uppercase;padding-top:3px}
.contact-card{background:var(--paper2);border:1px solid var(--line);border-radius:8px;padding:34px}
.contact-card h3{font-size:18px;margin-bottom:6px}
.contact-card a.big{display:block;font-size:19px;font-weight:700;color:var(--navy3);margin-top:14px}
.contact-card a.big:hover{color:var(--gold-d)}

/* ── 产品分类 / 单品页 / 解决方案（2026-10-23 新增） ── */
.btn-dark{background:var(--navy,#12263A);color:#fff;border:1px solid var(--navy,#12263A)}
.btn-dark:hover{background:#1d3a56}
.btn-line{border:1px solid var(--line);color:var(--ink)}
.btn-line:hover{border-color:var(--navy,#12263A)}

.cat-nav{display:flex;flex-wrap:wrap;gap:10px;margin:34px 0 0}
.cat-chip{display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border:1px solid var(--line);
  border-radius:999px;font-size:13.5px;color:var(--ink);background:#fff}
.cat-chip span{font-size:11.5px;color:#8A93A0}
.cat-chip:hover{border-color:#C8A96A}
.cat-chip.on{background:var(--navy,#12263A);color:#fff;border-color:var(--navy,#12263A)}
.cat-chip.on span{color:#B9C6D4}
.cat-note{max-width:60ch;color:#5A6472;font-size:14.5px;margin:20px 0 8px}
.sub-h{font-size:20px;font-weight:700;margin:46px 0 18px;display:flex;align-items:baseline;gap:10px}
.sub-n{font-size:12.5px;font-weight:600;color:#8A93A0;letter-spacing:.06em}

.p-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:1040px){.p-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){.p-grid{grid-template-columns:repeat(2,1fr)}}
.p-card{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;
  display:flex;flex-direction:column;transition:.18s}
.p-card:hover{border-color:#C8A96A;transform:translateY(-2px);box-shadow:0 10px 24px rgba(18,38,58,.07)}
.p-img{position:relative;aspect-ratio:4/3;background:#fff}
.p-img img{position:absolute;top:14px;left:14px;width:calc(100% - 28px);height:calc(100% - 28px);object-fit:contain}
.p-name{padding:12px 14px 15px;font-size:13.5px;line-height:1.45;color:var(--ink);border-top:1px solid var(--line)}
.cat-cta{display:flex;gap:14px;flex-wrap:wrap;margin:56px 0 70px}

.crumb{font-size:13px;color:#7A8798;padding:26px 0 0;display:flex;gap:8px;flex-wrap:wrap}
.crumb a:hover{color:var(--navy,#12263A)}
.crumb em{font-style:normal;color:var(--ink)}
.p-detail{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding:34px 0 20px}
@media(max-width:860px){.p-detail{grid-template-columns:1fr;gap:30px}}
.p-detail-img{background:#fff;border:1px solid var(--line);border-radius:14px;padding:34px;
  display:flex;align-items:center;justify-content:center;min-height:340px}
.p-detail-img img{max-width:100%;max-height:420px;width:auto;height:auto;object-fit:contain}
.p-detail-txt h1{font-size:clamp(24px,2.6vw,34px);margin:10px 0 0}
.p-line{color:#4B5665;font-size:16px;margin:18px 0 26px;max-width:44ch}
.p-points{margin:26px 0 0;padding-left:18px;color:#5A6472;font-size:14px}
.p-points li{margin-bottom:8px}
.p-pager{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);
  padding:26px 0 70px;margin-top:30px;flex-wrap:wrap}
.pager{font-size:14px;color:var(--ink);max-width:46%}
.pager span{display:block;font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:#8A93A0;margin-bottom:5px}
.pager.next{text-align:right;margin-left:auto}
.pager:hover{color:#8a6f31}

.sol-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin:36px 0 70px}
@media(max-width:760px){.sol-grid{grid-template-columns:1fr}}
.sol-card{display:block;background:#fff;border:1px solid var(--line);border-radius:14px;padding:30px 28px;
  transition:.18s}
.sol-card:hover{border-color:#C8A96A;transform:translateY(-2px);box-shadow:0 12px 28px rgba(18,38,58,.07)}
.sol-k{font-family:Montserrat,Inter,sans-serif;font-size:22px;font-weight:800;color:var(--navy,#12263A)}
.sol-card p{color:#5A6472;font-size:14.5px;margin:12px 0 16px}
.sol-more{font-size:13px;font-weight:600;color:#8a6f31}
.sys-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:900px){.sys-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.sys-grid{grid-template-columns:1fr}}
.sys-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 20px}
.sys-card h4{font-size:15.5px;margin-bottom:8px}
.sys-card p{color:#5A6472;font-size:14px}
.sol-note{background:#fff;border:1px solid var(--line);border-radius:14px;padding:32px 30px;margin:44px 0 26px}
.sol-note h3{font-size:20px;margin-bottom:10px}
.sol-note p{color:#5A6472;font-size:15px;max-width:62ch}
.steps{margin:20px 0 0;padding-left:20px;color:#4B5665;font-size:14.5px}
.steps li{margin-bottom:10px}
.sol-others{color:#7A8798;font-size:13.5px;margin-bottom:70px}
.sol-others a{color:#8a6f31}

.rowlink{margin-top:18px}
.rowlink a{font-size:13.5px;font-weight:600;color:#8a6f31;border-bottom:1px solid rgba(200,169,106,.45);
  padding-bottom:2px}
.rowlink a:hover{color:#6f5722}

/* ── 教育方案：系统流程（拓扑） ── */
.flow{display:grid;grid-template-columns:1fr 78px 1fr 78px 1fr;gap:0;align-items:stretch;margin:6px 0 10px}
@media(max-width:900px){.flow{grid-template-columns:1fr;gap:6px}.flow-arrow{justify-content:flex-start;padding:6px 0 6px 8px}}
.flow-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 20px 18px;
  display:flex;flex-direction:column}
.flow-n{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:#8A93A0;margin-bottom:8px}
.flow-card h4{font-size:16px;margin-bottom:8px}
.flow-card p{color:#5A6472;font-size:13.5px;line-height:1.55}
.flow-img{margin-top:18px;height:140px;display:flex;align-items:center;justify-content:center}
.flow-img img{max-width:100%;max-height:140px;object-fit:contain}
.flow-arrow{display:flex;flex-direction:column;align-items:center;justify-content:center;color:#C8A96A;
  font-size:22px;line-height:1}
.flow-arrow span{font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:#9AA3B0;margin-bottom:4px}
.flow-note{color:#5A6472;font-size:14.5px;max-width:70ch;margin:14px 0 0}

/* 产品总览：整块图可点 */
.shot-link{display:block}
.shot-link img{transition:transform .25s}
.shot-link:hover img{transform:translateY(-3px)}
.prod-row h2 a:hover{color:#8a6f31}