/* ============================================================
   智麒云互联官网 2.0 — 设计系统 site.css
   与 /zq-promo 共用同一套 token，品牌视觉统一
   ============================================================ */
:root{
  --bg:#070b14; --bg2:#0b1120; --bg3:#0f1626;
  --card:rgba(255,255,255,.04); --card-hi:rgba(255,255,255,.06);
  --bd:rgba(255,255,255,.09); --bd-hi:rgba(34,211,238,.38);
  --cyan:#22d3ee; --blue:#3b82f6; --violet:#8b5cf6;
  --text:#e5edf7; --muted:#8fa3bd; --muted2:#6f839c;
  --grad:linear-gradient(135deg,#22d3ee 0%,#3b82f6 55%,#8b5cf6 100%);
  --r-sm:10px; --r:14px; --r-lg:18px;
  --shadow:0 24px 60px rgba(0,0,0,.45);
  --maxw:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--text); overflow-x:hidden;
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px; line-height:1.75; -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
::selection{background:rgba(34,211,238,.3)}

/* 背景装饰 */
.bg-grid{position:fixed;inset:0;z-index:-2;pointer-events:none;
  background-image:linear-gradient(rgba(34,211,238,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(34,211,238,.045) 1px,transparent 1px);
  background-size:56px 56px}
.bg-glow{position:fixed;z-index:-1;pointer-events:none;border-radius:50%;filter:blur(120px);opacity:.5}
.g1{width:520px;height:520px;background:rgba(59,130,246,.22);top:-160px;left:-100px}
.g2{width:460px;height:460px;background:rgba(139,92,246,.18);top:40%;right:-140px}
.g3{width:420px;height:420px;background:rgba(34,211,238,.14);bottom:-120px;left:30%}

/* 通用容器 */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 6vw}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 30px;border-radius:var(--r-sm);
  font-size:15.5px;font-weight:700;transition:transform .25s,box-shadow .25s,background .25s;cursor:pointer;border:0}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 30px rgba(59,130,246,.42)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 40px rgba(59,130,246,.58)}
.btn-ghost{border:1px solid rgba(255,255,255,.22);color:#dfe9f5;background:rgba(255,255,255,.04)}
.btn-ghost:hover{background:rgba(255,255,255,.1);transform:translateY(-2px)}
.arrow{width:16px;height:16px;position:relative;flex:none}
.arrow::after{content:"";position:absolute;inset:5px 2px;border-top:1.6px solid currentColor;border-right:1.6px solid currentColor;transform:rotate(45deg)}

/* ============ 导航 ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .3s,border-color .3s,backdrop-filter .3s;
  border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(7,11,20,.82);backdrop-filter:blur(14px);border-bottom-color:rgba(255,255,255,.07)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:14px 6vw;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{width:34px;height:34px;border-radius:9px;background:var(--grad);display:flex;align-items:center;justify-content:center;
  font-weight:900;font-size:19px;color:#fff;box-shadow:0 0 20px rgba(59,130,246,.55)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:16.5px;font-weight:800;letter-spacing:.5px}
.brand-text i{font-style:normal;font-size:11px;letter-spacing:1.6px;color:var(--muted2)}
.nav-links{display:flex;align-items:center;gap:30px;font-size:14.5px;color:var(--muted)}
.nav-link{position:relative;padding:8px 0;display:inline-flex;align-items:center;gap:5px;transition:color .2s}
.nav-link:hover{color:#fff}
.caret{width:6px;height:6px;border-right:1.4px solid currentColor;border-bottom:1.4px solid currentColor;transform:rotate(45deg) translateY(-2px)}
.nav-item{position:relative}
.drop{position:absolute;top:calc(100% + 14px);left:-14px;width:340px;padding:10px;border-radius:var(--r);
  background:rgba(11,17,32,.97);border:1px solid var(--bd);box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(8px);transition:.25s}
.nav-item:hover .drop,.nav-item:focus-within .drop{opacity:1;visibility:visible;transform:translateY(0)}
.drop a{display:flex;flex-direction:column;gap:2px;padding:12px 14px;border-radius:10px;transition:background .2s}
.drop a:hover{background:rgba(34,211,238,.08)}
.drop b{font-size:14.5px;color:#fff}
.drop span{font-size:12.5px;color:var(--muted2)}
.nav-right{display:flex;align-items:center;gap:14px;flex:none}
.burger{display:none;width:42px;height:38px;border:1px solid var(--bd);border-radius:10px;background:rgba(255,255,255,.04);
  flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer}
.burger span{width:18px;height:1.8px;background:#dfe9f5;border-radius:2px;transition:.25s}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ Hero ============ */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:150px 0 90px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:-1}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.34}
.hero-bg::after{content:"";position:absolute;inset:0;background:
  linear-gradient(180deg,rgba(7,11,20,.62) 0%,rgba(7,11,20,.8) 55%,var(--bg) 100%),
  radial-gradient(80% 60% at 15% 45%,rgba(7,11,20,.85) 0%,transparent 70%)}
.hero-inner{width:100%}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#bfe9ff;background:rgba(34,211,238,.1);
  border:1px solid rgba(34,211,238,.3);padding:7px 16px;border-radius:999px;margin-bottom:26px}
.pulse{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}
.hero h1{font-size:clamp(32px,5vw,60px);font-weight:900;line-height:1.16;letter-spacing:.5px;margin-bottom:24px}
.hero-lead{font-size:clamp(15px,1.55vw,18px);color:#b9c9de;max-width:760px;margin-bottom:38px}
.hero-ctas{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:64px}
.hero-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:18px;max-width:900px}
.stat{background:var(--card);border:1px solid var(--bd);border-radius:var(--r);padding:20px 22px;backdrop-filter:blur(8px)}
.stat b{display:block;font-size:29px;font-weight:800;line-height:1.2;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat span{font-size:13px;color:var(--muted)}

/* ============ 信任带 ============ */
.strip{border-top:1px solid var(--bd);border-bottom:1px solid var(--bd);background:rgba(255,255,255,.015);padding:20px 0}
.strip-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 0;
  font-size:14px;color:var(--muted);letter-spacing:.3px}
.strip-inner i{width:5px;height:5px;border-radius:50%;background:var(--cyan);opacity:.5}

/* ============ 区块通用 ============ */
.sec{padding:110px 0;position:relative}
.sec-alt{background:linear-gradient(180deg,transparent,rgba(59,130,246,.05),transparent)}
.sec-head{max-width:820px;margin-bottom:56px}
.sec-tag{display:inline-block;font-size:12.5px;letter-spacing:2.4px;color:var(--cyan);border:1px solid rgba(34,211,238,.32);
  padding:5px 14px;border-radius:999px;margin-bottom:20px;background:rgba(34,211,238,.06)}
h2{font-size:clamp(26px,3.6vw,40px);font-weight:800;line-height:1.28;letter-spacing:.5px;margin-bottom:16px}
.sec-sub{color:var(--muted);font-size:16px;max-width:760px}

/* ============ 产品卡 4 列 ============ */
.cards-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pcard{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--bd);border-radius:var(--r-lg);
  overflow:hidden;transition:transform .3s,border-color .3s,background .3s}
.pcard:hover{transform:translateY(-6px);border-color:var(--bd-hi);background:var(--card-hi)}
.pcard-img{position:relative;aspect-ratio:1/1;overflow:hidden}
.pcard-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.pcard:hover .pcard-img img{transform:scale(1.05)}
.pcard-img::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(7,11,20,.75))}
.pcard-body{padding:0 22px 24px;margin-top:-34px;position:relative;display:flex;flex-direction:column;flex:1}
.pcard-no{font-size:12px;font-weight:700;letter-spacing:2px;color:var(--cyan)}
.pcard-body h3{font-size:19.5px;font-weight:800;margin:8px 0 10px}
.pcard-body>p{font-size:14px;color:var(--muted);margin-bottom:16px}
.dot-list{display:grid;gap:8px;margin-bottom:20px}
.dot-list li{position:relative;padding-left:16px;font-size:13.5px;color:#b9c9de}
.dot-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--grad)}
.pcard-more{margin-top:auto;display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;
  color:#bfe9ff;transition:gap .25s}
.pcard:hover .pcard-more{gap:12px}

/* ============ 技术实力 ============ */
.tech{display:grid;grid-template-columns:1.65fr 1fr;gap:26px;align-items:stretch}
.tech-arch{display:grid;gap:16px}
.layer{background:var(--card);border:1px solid var(--bd);border-radius:var(--r);padding:20px 22px;transition:border-color .3s,transform .3s}
.layer:hover{border-color:var(--bd-hi);transform:translateX(4px)}
.layer-hd{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.layer-no{font-size:11.5px;font-weight:800;letter-spacing:1.4px;color:#041018;background:var(--grad);
  padding:3px 9px;border-radius:6px}
.layer-hd b{font-size:16px;font-weight:700}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips span{font-size:12.5px;color:#c7d8ea;background:rgba(255,255,255,.05);border:1px solid var(--bd);
  padding:5px 12px;border-radius:8px;transition:.25s}
.chips span:hover{border-color:rgba(34,211,238,.4);color:#fff}
.tech-side{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.metric{background:var(--card);border:1px solid var(--bd);border-radius:var(--r);padding:20px;
  display:flex;flex-direction:column;justify-content:center;gap:6px;transition:.3s}
.metric:hover{border-color:var(--bd-hi);background:var(--card-hi)}
.metric b{font-size:30px;font-weight:800;line-height:1.1;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.metric span{font-size:12.5px;color:var(--muted);line-height:1.6}
.stack{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:30px}
.stack-label{font-size:13px;color:var(--muted2);letter-spacing:1.6px;margin-right:6px}
.stack span:not(.stack-label){font-size:12.5px;color:#c7d8ea;border:1px solid var(--bd);background:rgba(255,255,255,.04);
  padding:5px 13px;border-radius:999px}

/* ============ 场景卡 3 列 ============ */
.scard{background:var(--card);border:1px solid var(--bd);border-radius:var(--r-lg);padding:28px 26px;position:relative;
  overflow:hidden;transition:transform .3s,border-color .3s,background .3s}
.scard::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);opacity:0;transition:.3s}
.scard:hover{transform:translateY(-6px);border-color:var(--bd-hi);background:rgba(34,211,238,.045)}
.scard:hover::before{opacity:1}
.sicon{width:44px;height:44px;border-radius:12px;background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.2);
  display:flex;align-items:center;justify-content:center;color:var(--cyan);margin-bottom:18px}
.sicon svg{width:22px;height:22px}
.scard h3{font-size:18.5px;font-weight:800;margin-bottom:10px}
.scard p{font-size:14px;color:var(--muted)}
.tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}
.tags span{font-size:12px;color:#bfe9ff;background:rgba(34,211,238,.09);border:1px solid rgba(34,211,238,.22);
  padding:3px 11px;border-radius:999px}

/* ============ 交付卡 ============ */
.cards-4.tight .dcard{padding:26px 24px}
.dcard{background:var(--card);border:1px solid var(--bd);border-radius:var(--r);transition:.3s}
.dcard:hover{border-color:var(--bd-hi);transform:translateY(-4px)}
.dcard b{display:block;font-size:17px;font-weight:800;margin-bottom:10px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.dcard p{font-size:13.5px;color:var(--muted)}

/* ============ 案例 ============ */
.partners{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.partners span{font-size:15px;font-weight:700;color:#cfdceb;background:rgba(255,255,255,.05);
  border:1px solid var(--bd);padding:12px 26px;border-radius:var(--r);letter-spacing:.5px}
.ccard{background:var(--card);border:1px solid var(--bd);border-radius:var(--r-lg);padding:26px 24px;transition:.3s}
.ccard:hover{border-color:var(--bd-hi);background:var(--card-hi);transform:translateY(-4px)}
.ccard-tag{font-size:12px;color:var(--cyan);letter-spacing:1.2px}
.ccard h3{font-size:18px;font-weight:800;margin:10px 0 10px}
.ccard p{font-size:14px;color:var(--muted)}

/* ============ 关于我们 ============ */
.about{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.about-text p{color:var(--muted);font-size:15.5px;margin-bottom:16px}
.about-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:32px}
.fact{background:var(--card);border:1px solid var(--bd);border-radius:var(--r);padding:18px 20px}
.fact b{display:block;font-size:24px;font-weight:800;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.fact span{font-size:12.5px;color:var(--muted)}
.about-visual{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--bd);box-shadow:var(--shadow);position:relative}
.about-visual img{width:100%;aspect-ratio:1/1;object-fit:cover}
.about-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(7,11,20,.6))}

/* ============ CTA ============ */
.cta{padding:40px 0 110px}
.cta-inner{text-align:center;background:linear-gradient(135deg,rgba(34,211,238,.1),rgba(59,130,246,.09),rgba(139,92,246,.1));
  border:1px solid rgba(34,211,238,.22);border-radius:24px;padding:64px 32px}
.cta-inner h2{margin-bottom:12px}
.cta-inner p{color:#b9c9de;margin-bottom:30px}
.cta-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ============ 页脚 ============ */
.footer{border-top:1px solid var(--bd);background:rgba(255,255,255,.015);padding:56px 0 26px}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.fcol{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--muted)}
.fcol b{color:#fff;font-size:14.5px;margin-bottom:4px}
.fcol a:hover{color:#fff}
.fcol-brand p{font-size:13.5px;line-height:1.8;color:var(--muted2)}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:44px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.06);font-size:13px;color:var(--muted2)}
.footer-bottom a:hover{color:#fff}

/* ============ 滚动入场 ============ */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .pulse{animation:none}
}

/* ============ 响应式 ============ */
@media (max-width:1100px){
  .cards-4{grid-template-columns:repeat(2,1fr)}
  .tech{grid-template-columns:1fr}
  .about{grid-template-columns:1fr;gap:34px}
  .about-visual{max-width:420px}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .cards-3{grid-template-columns:1fr}
  .nav-links{display:none}
  .nav-links.open{display:flex;position:fixed;top:66px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:rgba(7,11,20,.98);border-bottom:1px solid var(--bd);padding:12px 6vw 22px;max-height:calc(100vh - 66px);overflow:auto}
  .nav-links.open .nav-item{position:static}
  .nav-links.open .nav-link{padding:14px 0;font-size:16px;color:#e5edf7;border-bottom:1px solid rgba(255,255,255,.06);width:100%}
  .nav-links.open .drop{position:static;opacity:1;visibility:visible;transform:none;width:auto;background:transparent;
    border:0;box-shadow:none;padding:6px 0 14px}
  .nav-links.open .drop a{padding:10px 0}
  .burger{display:flex}
  .sec{padding:78px 0}
  .hero{padding:126px 0 66px;min-height:auto}
  .hero-ctas{margin-bottom:44px}
  .tech-side{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .cards-4{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr 1fr;gap:12px}
  .stat{padding:16px 18px}
  .stat b{font-size:24px}
  .about-facts{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .strip-inner{justify-content:flex-start;gap:10px 18px}
  .strip-inner i{display:none}
  .cta-inner{padding:44px 22px}
  .brand-text i{display:none}
}

/* ============================================================
   内页组件（产品页 / 解决方案 / 技术实力 / 关于 / 联系 / 404）
   ============================================================ */
.nav-link.on{color:#fff}
.nav-link.on::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--grad);border-radius:2px}

/* 内页头部 */
.phero{position:relative;padding:150px 0 84px;overflow:hidden;border-bottom:1px solid var(--bd)}
.phero-bg{position:absolute;inset:0;z-index:-1}
.phero-bg img{width:100%;height:100%;object-fit:cover;opacity:.22}
.phero-bg::after{content:"";position:absolute;inset:0;background:
  linear-gradient(180deg,rgba(7,11,20,.7) 0%,rgba(7,11,20,.86) 55%,var(--bg) 100%),
  radial-gradient(75% 65% at 12% 40%,rgba(7,11,20,.9) 0%,transparent 70%)}
.phero-in{position:relative}
.phero h1{font-size:clamp(30px,4.4vw,52px);font-weight:900;line-height:1.2;letter-spacing:.5px;margin-bottom:22px}
.phero .hero-lead{max-width:780px;margin-bottom:34px}
.phero .hero-stats{max-width:900px;margin-top:8px}

/* 痛点 */
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pain{position:relative;background:var(--card);border:1px solid var(--bd);border-radius:var(--r-lg);padding:28px 26px;transition:.3s}
.pain:hover{border-color:rgba(139,92,246,.35);background:var(--card-hi);transform:translateY(-4px)}
.pain-n{display:inline-block;font-size:12px;font-weight:800;letter-spacing:1.6px;color:var(--violet);margin-bottom:12px}
.pain h3{font-size:18px;font-weight:800;margin-bottom:10px}
.pain p{font-size:14px;color:var(--muted)}

/* 能力卡 */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.capcard{background:var(--card);border:1px solid var(--bd);border-radius:var(--r-lg);padding:28px 26px;transition:.3s;position:relative;overflow:hidden}
.capcard::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:0;transition:.3s}
.capcard:hover{border-color:var(--bd-hi);background:var(--card-hi);transform:translateY(-5px)}
.capcard:hover::before{opacity:1}
.capnum{font-size:12px;font-weight:800;letter-spacing:2px;color:var(--cyan)}
.capcard h3{font-size:18px;font-weight:800;margin:10px 0 10px}
.capcard>p{font-size:14px;color:var(--muted);margin-bottom:16px}

/* 流程 */
.flow{display:grid;gap:14px;counter-reset:fs}
.fstep{display:flex;gap:18px;align-items:flex-start;background:var(--card);border:1px solid var(--bd);border-radius:var(--r);padding:20px 24px;transition:.3s}
.fstep:hover{border-color:var(--bd-hi);background:var(--card-hi);transform:translateX(4px)}
.fstep-n{flex:none;width:34px;height:34px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;
  display:flex;align-items:center;justify-content:center;font-size:15px;box-shadow:0 6px 18px rgba(59,130,246,.35)}
.fstep b{display:block;font-size:16px;margin-bottom:4px}
.fstep p{font-size:13.5px;color:var(--muted)}

/* 解决方案卡 */
.sol-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.solcard{background:var(--card);border:1px solid var(--bd);border-radius:var(--r-lg);padding:30px 28px;transition:.3s}
.solcard:hover{border-color:var(--bd-hi);background:var(--card-hi);transform:translateY(-4px)}
.sol-hd{display:flex;align-items:baseline;gap:12px;margin-bottom:12px}
.sol-no{font-size:13px;font-weight:800;letter-spacing:1.4px;color:var(--cyan)}
.sol-hd h3{font-size:19px;font-weight:800}
.sol-pain{font-size:14px;color:var(--muted);margin-bottom:18px;padding-left:14px;border-left:2px solid rgba(139,92,246,.5)}
.sol-combo{display:flex;flex-direction:column;gap:6px;margin-bottom:18px;padding:14px 16px;border-radius:var(--r);
  background:rgba(34,211,238,.06);border:1px solid rgba(34,211,238,.16)}
.sol-combo b{font-size:12px;letter-spacing:1.2px;color:var(--cyan)}
.sol-combo span{font-size:13.5px;color:#cfdceb}

/* 工程底座 */
.comp-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.comp{background:var(--card);border:1px solid var(--bd);border-radius:var(--r);padding:24px 22px;transition:.3s}
.comp:hover{border-color:var(--bd-hi);background:var(--card-hi);transform:translateY(-4px)}
.comp-ico{width:42px;height:42px;border-radius:11px;background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.2);
  display:flex;align-items:center;justify-content:center;color:var(--cyan);margin-bottom:16px}
.comp-ico svg{width:21px;height:21px}
.comp h3{font-size:16px;font-weight:800;margin-bottom:8px}
.comp p{font-size:13px;color:var(--muted)}

/* 相关产品 */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.relcard{display:flex;flex-direction:column;gap:8px;background:var(--card);border:1px solid var(--bd);border-radius:var(--r);
  padding:20px 22px;transition:.3s}
.relcard:hover{border-color:var(--bd-hi);background:var(--card-hi);transform:translateY(-3px)}
.relcard b{font-size:15.5px;font-weight:700}
.relcard span{font-size:13px;color:var(--muted);display:inline-flex;align-items:center;gap:8px}
.relcard:hover span{color:#bfe9ff}

/* 技术架构竖排 */
.tarch-wrap{display:grid;gap:18px}
.tarch{background:var(--card);border:1px solid var(--bd);border-radius:var(--r-lg);padding:26px 28px;transition:.3s}
.tarch:hover{border-color:var(--bd-hi);background:var(--card-hi)}
.tarch-hd{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.tarch-hd b{font-size:18px;font-weight:800}
.tarch>p{font-size:14.5px;color:var(--muted);margin-bottom:16px;max-width:900px}

/* 时间线 */
.timeline{position:relative;display:grid;gap:20px;padding-left:26px}
.timeline::before{content:"";position:absolute;left:6px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--cyan),var(--blue),var(--violet));opacity:.35}
.tlitem{position:relative}
.tl-dot{position:absolute;left:-26px;top:8px;width:14px;height:14px;border-radius:50%;background:var(--bg);
  border:2px solid var(--cyan);box-shadow:0 0 12px rgba(34,211,238,.6)}
.tl-body{background:var(--card);border:1px solid var(--bd);border-radius:var(--r);padding:20px 24px}
.tl-body b{display:block;font-size:12.5px;letter-spacing:1.4px;color:var(--cyan);margin-bottom:6px}
.tl-body h3{font-size:17.5px;font-weight:800;margin-bottom:8px}
.tl-body p{font-size:14px;color:var(--muted)}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ccontact{display:flex;flex-direction:column;gap:8px;background:var(--card);border:1px solid var(--bd);border-radius:var(--r-lg);
  padding:28px 26px;transition:.3s}
.ccontact:hover{border-color:var(--bd-hi);background:var(--card-hi);transform:translateY(-4px)}
.cc-label{font-size:12px;letter-spacing:1.6px;color:var(--cyan)}
.ccontact b{font-size:19px;font-weight:800;word-break:break-all}
.cc-sub{font-size:13px;color:var(--muted)}

/* FAQ */
.faq-wrap{display:grid;gap:14px;max-width:920px}
.faq{background:var(--card);border:1px solid var(--bd);border-radius:var(--r);padding:18px 22px;transition:.3s}
.faq:hover{border-color:rgba(34,211,238,.28)}
.faq summary{display:flex;justify-content:space-between;align-items:center;gap:16px;cursor:pointer;
  font-size:15.5px;font-weight:700;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq-ic{flex:none;width:14px;height:14px;position:relative}
.faq-ic::before,.faq-ic::after{content:"";position:absolute;background:var(--cyan);border-radius:2px;transition:.25s}
.faq-ic::before{left:0;right:0;top:6px;height:1.8px}
.faq-ic::after{top:0;bottom:0;left:6px;width:1.8px}
.faq[open] .faq-ic::after{transform:scaleY(0)}
.faq p{margin-top:14px;font-size:14px;color:var(--muted);padding-top:14px;border-top:1px solid rgba(255,255,255,.07)}

/* 更多按钮行 */
.more-line{margin-top:30px}

/* 404 */
.err-sec{padding:170px 0 120px;text-align:center}
.err-wrap{max-width:760px}
.err-code{font-size:clamp(72px,14vw,140px);font-weight:900;line-height:1;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;opacity:.9;margin-bottom:8px}
.err-wrap h1{font-size:clamp(24px,3.4vw,36px);font-weight:800;margin-bottom:14px}
.err-wrap>p,.err-sec p{color:var(--muted);margin-bottom:28px}
.err-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:44px}
.err-links{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.err-links a{font-size:13px;color:#c7d8ea;background:rgba(255,255,255,.04);border:1px solid var(--bd);padding:7px 15px;border-radius:999px;transition:.25s}
.err-links a:hover{border-color:var(--bd-hi);color:#fff}

/* 内页响应式 */
@media (max-width:1100px){
  .pain-grid,.cap-grid,.rel-grid,.contact-grid{grid-template-columns:repeat(2,1fr)}
  .comp-grid{grid-template-columns:repeat(2,1fr)}
  .sol-grid{grid-template-columns:1fr}
}
@media (max-width:900px){
  .phero{padding:120px 0 62px}
  .nav-links.open .nav-link.on::after{display:none}
}
@media (max-width:640px){
  .pain-grid,.cap-grid,.rel-grid,.contact-grid,.comp-grid{grid-template-columns:1fr}
  .ccontact b{font-size:17px}
}