/* =====================================================
   创宇智能 · 官网主题样式 (从0设计 / 欧美大公司质感)
   深蓝藏青 + 银白 · 站点级共享样式
   ===================================================== */
:root{
  --navy-900:#0a1730;
  --navy-800:#0e2040;
  --navy-700:#13305c;
  --navy-600:#1a3a6e;
  --navy-500:#22488a;
  --blue:#1e50ae;
  --blue-light:#3a6fd4;
  --accent:#4d9fff;
  --silver:#eef2f7;
  --line:#dce3ec;
  --ink:#182233;
  --muted:#5c6b80;
  --white:#ffffff;
  --shadow:0 10px 30px rgba(10,23,48,.10);
  --shadow-lg:0 20px 50px rgba(10,23,48,.16);
  --radius:14px;
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Chinese Quote",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--white);line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{padding:88px 0}

/* ---------- NAV ---------- */
header{position:sticky;top:0;z-index:50;background:rgba(10,23,48,.94);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px;color:#fff}
.brand .mark{width:38px;height:38px;border-radius:9px;display:grid;place-items:center;background:linear-gradient(135deg,var(--blue),var(--accent));flex:none}
.brand .mark svg{width:22px;height:22px;stroke:#fff}
.brand b{font-size:19px;letter-spacing:1px;font-weight:700}
.brand span{font-size:11px;color:#9fb4d8;letter-spacing:3px;display:block;margin-top:1px}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{color:#d6e0f0;font-size:14.5px;letter-spacing:.5px;transition:color .2s}
.nav-links a:hover,.nav-links a.on{color:#fff}
.nav-links a.on{color:var(--accent)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 24px;border-radius:8px;font-size:14.5px;font-weight:600;letter-spacing:.5px;cursor:pointer;transition:all .2s;border:none}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-light);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-white{background:#fff;color:var(--navy-800)}
.btn-white:hover{background:var(--silver)}
.nav-cta{background:var(--accent);color:#fff}
.nav-cta:hover{background:#5fafff}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.burger i{width:22px;height:2px;background:#fff;border-radius:2px}

/* ---------- HERO (home) ---------- */
.hero{position:relative;color:#fff;min-height:calc(100vh - 72px);display:flex;align-items:center;overflow:hidden;
  background:linear-gradient(100deg,rgba(7,16,35,.94) 6%,rgba(10,26,52,.84) 40%,rgba(8,20,42,.32) 74%),url(../img/hero.jpg) center/cover no-repeat}
.hero-inner{position:relative;z-index:2;max-width:680px;padding:60px 0 72px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;letter-spacing:2px;color:#bcd3ff;border:1px solid rgba(255,255,255,.22);border-radius:100px;padding:7px 16px;margin-bottom:26px;background:rgba(255,255,255,.05)}
.eyebrow b{color:#fff;font-weight:700}
.hero h1{font-size:52px;line-height:1.18;font-weight:800;letter-spacing:1px;margin-bottom:20px}
.hero h1 .accent{color:var(--accent)}
.hero .sub{font-size:20px;color:#d3deef;margin-bottom:36px;font-weight:400}
.hero .sub em{font-style:normal;color:#fff;font-weight:600}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero .meta{margin-top:52px;display:flex;gap:34px;color:#aebfe0;font-size:13.5px}
.hero .meta b{display:block;color:#fff;font-size:22px;font-weight:700}

/* ---------- PAGE HERO (inner pages) ---------- */
.page-hero{color:#fff;text-align:center;padding:96px 24px 84px;
  background:linear-gradient(120deg,var(--navy-900),var(--navy-600))}
.page-hero h1{font-size:44px;font-weight:800;letter-spacing:2px}
.page-hero .crumb{font-size:14px;color:#9fb4d8;margin-top:16px;letter-spacing:1px}
.page-hero .crumb span{color:var(--accent);margin:0 8px}

/* ---------- DATA BAR ---------- */
.databar{background:linear-gradient(120deg,var(--navy-800),var(--navy-600));color:#fff}
.db-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:46px 0;text-align:center}
.db-item{position:relative}
.db-item:not(:last-child)::after{content:"";position:absolute;right:-12px;top:20%;height:60%;width:1px;background:rgba(255,255,255,.15)}
.db-num{font-size:46px;font-weight:800;color:#fff;line-height:1}
.db-num i{font-style:normal;color:var(--accent)}
.db-label{font-size:14px;color:#bcd3f5;margin-top:8px;letter-spacing:2px}

/* ---------- SECTION HEAD ---------- */
.s-head{max-width:700px;margin:0 auto 54px;text-align:center}
.s-tag{color:var(--blue);font-size:13px;font-weight:700;letter-spacing:4px;text-transform:uppercase;margin-bottom:12px}
.s-head h2{font-size:38px;font-weight:800;letter-spacing:1px;color:var(--navy-900);margin-bottom:14px}
.s-head p{color:var(--muted);font-size:16.5px}

/* ---------- BRAND BANNER ---------- */
.brand-banner{border-radius:var(--radius);color:#fff;padding:44px 48px;position:relative;overflow:hidden;background:linear-gradient(120deg,var(--navy-800) 0%,var(--navy-600) 100%);box-shadow:var(--shadow)}
.brand-banner .halo{position:absolute;right:-120px;top:-120px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(77,159,255,.5),transparent 70%)}
.bb-top{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:30px}
.bb-title{font-size:26px;font-weight:700;letter-spacing:1px}
.bb-title b{color:var(--accent)}
.bb-badges{display:flex;gap:40px;flex-wrap:wrap}
.bb-pair{font-size:20px;font-weight:700;color:#fff}
.bb-pair span{color:var(--accent);margin:0 14px;font-weight:300}
.bb-note{font-size:14px;color:#bcd3f5;margin-top:6px}
.bb-list{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;border-top:1px solid rgba(255,255,255,.14);padding-top:28px}
.bb-item{font-size:14.5px;color:#d6e0f0;display:flex;gap:10px;align-items:center}
.bb-item svg{width:18px;height:18px;stroke:var(--accent);flex:none}

/* ---------- PRODUCTS ---------- */
.gl-tag{color:var(--muted);font-size:13px;letter-spacing:2px;margin-bottom:34px;text-transform:uppercase}
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:all .25s ease;box-shadow:0 2px 10px rgba(10,23,48,.04)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.card .thumb{height:210px;overflow:hidden;background:var(--silver);position:relative}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s}
.card:hover .thumb img{transform:scale(1.06)}
.card .badge{position:absolute;top:14px;left:14px;background:var(--navy-800);color:#fff;font-size:11px;letter-spacing:2px;padding:5px 12px;border-radius:100px;font-weight:600}
.card .badge.hot{background:var(--accent)}
.card .body{padding:22px 24px 24px}
.card h3{font-size:19px;font-weight:700;color:var(--navy-900);margin-bottom:8px}
.card p{font-size:14px;color:var(--muted);min-height:42px}
.card .more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;color:var(--blue);font-weight:600;font-size:14px}
.card .more svg{width:16px;height:16px;stroke:var(--blue);transition:transform .2s}
.card:hover .more svg{transform:translateX(4px)}

/* ---------- WHY / FEATURE ---------- */
.why{background:var(--silver)}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.why-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px}
.why-card .ic{width:52px;height:52px;border-radius:12px;display:grid;place-items:center;margin-bottom:18px;background:linear-gradient(135deg,var(--navy-700),var(--blue));color:#fff}
.why-card .ic svg{width:26px;height:26px;stroke:#fff;fill:none}
.why-card h3{font-size:18px;font-weight:700;color:var(--navy-900);margin-bottom:8px}
.why-card p{font-size:14px;color:var(--muted)}

/* ---------- SOLUTION ---------- */
.sol-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:52px;align-items:center}
.sol-sub{font-size:15px;color:var(--muted);margin-top:14px}
.sol-list{margin-top:30px;display:flex;flex-direction:column;gap:18px}
.sol-item{display:flex;gap:16px}
.sol-item .n{width:38px;height:38px;border-radius:10px;flex:none;display:grid;place-items:center;background:var(--navy-800);color:#fff;font-weight:700;font-size:15px}
.sol-item h4{font-size:17px;color:var(--navy-900);font-weight:700}
.sol-item p{font-size:14px;color:var(--muted)}
.sol-imgwrap{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.sol-imgwrap img{width:100%;height:430px;object-fit:cover}
.sol-free{position:absolute;left:20px;bottom:20px;background:rgba(10,23,48,.86);color:#fff;border-radius:12px;padding:12px 18px;font-size:13.5px;backdrop-filter:blur(6px)}
.sol-free b{color:var(--accent)}

/* ---------- PAGE TEXT / TABLE ---------- */
.prose{max-width:860px;margin:0 auto}
.prose p{font-size:15.5px;color:var(--muted);margin-bottom:16px}
.prose h3{font-size:22px;color:var(--navy-900);margin:30px 0 12px;font-weight:700}
.spec{width:100%;border-collapse:collapse;margin-top:20px;font-size:14px}
.spec th{background:var(--navy-800);color:#fff;text-align:left;padding:13px 16px;font-weight:600;letter-spacing:.5px}
.spec td{padding:13px 16px;border-bottom:1px solid var(--line);color:var(--ink)}
.spec tr:nth-child(even) td{background:var(--silver)}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:start}

/* ---------- CASES ---------- */
.case-filter{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-bottom:40px}
.cf{background:#fff;border:1px solid var(--line);border-radius:100px;padding:9px 22px;font-size:14px;color:var(--muted);cursor:pointer;transition:all .2s;font-family:inherit}
.cf:hover{border-color:var(--blue);color:var(--blue)}
.cf.active{background:var(--blue);color:#fff;border-color:var(--blue)}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:all .25s;box-shadow:0 2px 10px rgba(10,23,48,.04)}
.case:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.case .thumb{height:200px;overflow:hidden;position:relative;background:var(--silver)}
.case .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s}
.case:hover .thumb img{transform:scale(1.06)}
.case .tag2{position:absolute;top:14px;left:14px;background:rgba(10,23,48,.82);color:#fff;font-size:12px;padding:5px 12px;border-radius:100px}
.case .body{padding:20px 22px 24px}
.case h3{font-size:17px;font-weight:700;color:var(--navy-900);margin-bottom:6px}
.case .meta{font-size:13px;color:var(--muted)}
.case .meta i{font-style:normal;color:var(--blue);font-weight:600}
.case-group-title{font-size:24px;font-weight:800;color:var(--navy-900);margin:40px 0 24px;letter-spacing:1px;border-left:5px solid var(--accent);padding-left:16px}

/* ---------- STRENGTH ---------- */
.strength{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.st-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;text-align:center;transition:all .25s}
.st-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.st-card .num{font-size:34px;font-weight:800;color:var(--blue);line-height:1}
.st-card .num small{font-size:18px;color:var(--navy-900)}
.st-card p{font-size:14px;color:var(--muted);margin-top:8px}

/* ---------- FLOAT CONSULT ---------- */
.float-consult{position:fixed;right:22px;bottom:26px;z-index:60;display:flex;flex-direction:column;gap:12px}
.fc-btn{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;cursor:pointer;box-shadow:0 8px 24px rgba(10,23,48,.28);border:0;transition:transform .2s;position:relative}
.fc-btn:hover{transform:translateY(-3px)}
.fc-btn svg{width:26px;height:26px;stroke:#fff;fill:none}
.fc-phone{background:linear-gradient(135deg,var(--blue),var(--accent))}
.fc-wechat{background:#07c160}
.fc-mail{background:linear-gradient(135deg,#0ea5e9,#6366f1)}
.fc-btn .tip{position:absolute;right:66px;top:50%;transform:translateY(-50%);background:var(--navy-900);color:#fff;font-size:12.5px;padding:7px 12px;border-radius:8px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .2s}
.fc-btn:hover .tip{opacity:1}
.fc-pulse{position:absolute;inset:0;border-radius:50%;background:var(--accent);opacity:.35;animation:fcp 2.2s infinite}
@keyframes fcp{0%{transform:scale(1);opacity:.45}70%{transform:scale(1.7);opacity:0}100%{opacity:0}}
.fc-qr{position:fixed;right:22px;bottom:140px;z-index:61;background:#fff;border-radius:12px;padding:12px;box-shadow:var(--shadow-lg);display:none;width:150px;text-align:center}
.fc-qr.show{display:block}
.fc-qr .qrbox{height:120px;border:1px dashed var(--line);border-radius:8px;display:grid;place-items:center;color:var(--muted);font-size:12px}
.fc-qr p{font-size:12px;color:var(--muted);margin-top:8px}
.fc-qr p b{color:var(--navy-900)}

/* ---------- TIMELINE (服务流程) ---------- */
.flow{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:0}
.flow .step{text-align:center;padding:0 10px;position:relative}
.flow .step .dot{width:64px;height:64px;border-radius:50%;margin:0 auto 16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--navy-700),var(--blue));color:#fff;font-weight:800;font-size:20px;box-shadow:var(--shadow);position:relative;z-index:2}
.flow .step h4{font-size:16px;color:var(--navy-900);font-weight:700;margin-bottom:6px}
.flow .step p{font-size:13px;color:var(--muted)}
.flow .line{position:absolute;top:32px;left:12%;right:12%;height:2px;background:linear-gradient(90deg,var(--line),var(--accent));z-index:1}

/* ---------- CERT WALL ---------- */
.cert-wall{background:var(--silver)}
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.cert{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;position:relative;transition:all .25s}
.cert:hover{transform:translateY(-4px)}
.cert .frame{aspect-ratio:4/3;border:1.5px solid var(--line);border-radius:10px;display:grid;place-items:center;position:relative;overflow:hidden;background:linear-gradient(160deg,#fdfdff,#eef2f7)}
.cert .frame .no{text-align:center;color:#b9c4d3}
.cert .frame .no svg{width:44px;height:44px;stroke:var(--blue)}
.cert .frame .no span{display:block;font-size:12px;letter-spacing:3px;margin-top:6px}
.cert .frame .fill{position:absolute;inset:0}
.cert .frame .fill img{width:100%;height:100%;object-fit:contain;padding:6px}
.cert-tag{position:absolute;top:10px;left:14px;font-size:12px;color:var(--muted)}
.cert-title{font-size:14.5px;color:var(--navy-900);font-weight:600;margin-top:14px;text-align:center}

/* ---------- EXPORT BADGE ---------- */
.export-badge{display:inline-flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 22px;box-shadow:var(--shadow)}
.export-badge svg{width:30px;height:30px;stroke:var(--accent);fill:none}
.export-badge b{display:block;color:var(--navy-900);font-size:15px}
.export-badge span{font-size:12.5px;color:var(--muted)}

/* ---------- CONTACT ---------- */
.contact{background:linear-gradient(130deg,var(--navy-900),var(--navy-700));color:#fff}
.ct-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:60px;align-items:center;color:#d6e0f0}
.ct-grid h2{font-size:34px;color:#fff;font-weight:800;margin-bottom:14px}
.ct-grid p{font-size:15px;color:#bccdf0}
.ct-rows{margin-top:30px;display:flex;flex-direction:column;gap:18px}
.ct-row{display:flex;gap:16px;align-items:flex-start}
.ct-row .ic{width:44px;height:44px;border-radius:10px;flex:none;display:grid;place-items:center;background:rgba(255,255,255,.08)}
.ct-row .ic svg{width:22px;height:22px;stroke:var(--accent);fill:none}
.ct-row b{color:#fff;font-size:15px;display:block}
.ct-row span{font-size:14px;color:#bccdf0}
.ct-card{background:#fff;color:var(--ink);border-radius:var(--radius);padding:38px;box-shadow:var(--shadow)}
.ct-card h3{font-size:22px;color:var(--navy-900);font-weight:800;margin-bottom:8px}
.ct-card > p{font-size:14px;color:var(--muted);margin-bottom:26px}
.ct-form{display:flex;flex-direction:column;gap:14px}
.ct-form input,.ct-form textarea{padding:14px 16px;border:1px solid var(--line);border-radius:9px;font-size:14.5px;color:var(--ink);outline:none;font-family:inherit;resize:vertical}
.ct-form input:focus,.ct-form textarea:focus{border-color:var(--blue)}
.ct-card .btn-primary{width:100%;justify-content:center;padding:15px}
.ct-hint{font-size:12px;color:var(--muted);text-align:center;margin-top:14px}

/* ---------- FOOTER ---------- */
footer{background:var(--navy-900);color:#9fb4d8;padding:54px 0 30px}
.ft-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:36px}
.ft-brand b{color:#fff;font-size:18px;letter-spacing:1px}
.ft-brand p{font-size:13.5px;margin-top:10px;max-width:280px;color:#9fb4d8}
.ft-col h4{color:#fff;font-size:14px;letter-spacing:1px;margin-bottom:16px;font-weight:700}
.ft-col a,.ft-col span{display:block;font-size:13.5px;color:#9fb4d8;margin-bottom:9px;transition:color .2s}
.ft-col a:hover{color:#fff}
.ft-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:#7c92b8}

/* ---------- LAYER DIAGRAM (一站式三级架构) ---------- */
.layer-head{margin-bottom:8px}
.layer-static{position:relative;padding:8px 0 34px}
.layer-static::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--line)}
.layer-cols{display:grid;grid-template-columns:1fr;gap:22px;margin-top:26px}
.layer{border-radius:12px;padding:24px;color:#fff;box-shadow:var(--shadow)}
.layer .ln{display:inline-block;font-size:11.5px;letter-spacing:3px;opacity:.85;margin-bottom:8px;background:rgba(255,255,255,.16);padding:3px 10px;border-radius:100px;text-transform:uppercase}
.layer h3{font-size:20px;font-weight:800;margin-bottom:10px}
.layer ul{display:grid;grid-template-columns:1fr 1fr;gap:4px 16px}
.layer li{font-size:13.5px;opacity:.94;margin:4px 0;display:flex;gap:8px;align-items:center}
.layer li::before{content:"";width:6px;height:6px;flex:none;border-radius:50%;background:currentColor}
.layer-scheme{background:linear-gradient(120deg,#1a3c86,#2f6fd6)}
.layer-system{background:linear-gradient(120deg,#123064,#1e4f9e)}
.layer-device{background:linear-gradient(120deg,#0d2147,#153b7c)}

/* ---------- 四大产品板块 ---------- */
.quad-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.quad{background:#fff;border:1px solid var(--line);border-top:4px solid var(--blue);border-radius:var(--radius);padding:28px 24px;transition:all .25s}
.quad:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.quad .qk{font-size:13px;color:var(--blue);font-weight:800;letter-spacing:2px;text-transform:uppercase;margin-bottom:12px}
.quad h3{font-size:18px;color:var(--navy-900);font-weight:700;margin-bottom:8px}
.quad p{font-size:13.5px;color:var(--muted)}
.quad .qtags{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.quad .qtags i{font-style:normal;background:var(--silver);color:var(--navy-700);font-size:11.5px;padding:4px 9px;border-radius:100px}

/* ---------- 品牌全系列 ---------- */
.brand-series{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.bs{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 2px 10px rgba(10,23,48,.04);transition:all .25s}
.bs:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.bs .bs-head{background:linear-gradient(120deg,var(--navy-800),var(--navy-600));color:#fff;padding:18px 20px}
.bs .bs-head h3{font-size:17px;font-weight:800}
.bs .bs-head span{font-size:12px;color:#bcd3f5;letter-spacing:1px}
.bs .bs-body{padding:6px 0}
.bs .bs-row{display:flex;align-items:baseline;gap:10px;padding:11px 20px;border-bottom:1px solid var(--line);font-size:13.5px}
.bs .bs-row:last-child{border-bottom:0}
.bs .bs-row b{color:var(--navy-900);flex:none;font-weight:700}
.bs .bs-row span{color:var(--muted);font-size:12px;margin-left:auto;text-align:right}

/* ---------- 结果数据带 ---------- */
.result-band{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:34px}
.rb{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:12px;padding:22px 16px;text-align:center}
.rb .rb-num{font-size:30px;font-weight:800;color:var(--accent);line-height:1.1}
.rb .rb-num small{font-size:14px;color:#fff}
.rb p{font-size:12.5px;color:#c7d6f0;margin-top:8px}
.sol-section{border-bottom:1px solid var(--line)}

/* ---------- REVEAL ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:all .7s ease}
.reveal.in{opacity:1;transform:none}

.card2{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow,0 4px 18px rgba(10,31,68,.06))}
.card2 .thumb{overflow:hidden;aspect-ratio:4/3}
.card2 .thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s}
.card2:hover .thumb img{transform:scale(1.05)}
.card2 .cap{padding:12px 14px;font-size:14px;font-weight:600;color:var(--navy-900)}

.cert{border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:0 6px 22px rgba(10,31,68,.08);transition:transform .35s;padding:14px;flex:0 1 240px;min-width:150px}
.cert:hover{transform:translateY(-6px)}
.cert .cert-img{border-radius:calc(var(--radius) - 6px);overflow:hidden;background:#f2f4f7;display:flex;align-items:center;justify-content:center;height:330px}
.cert .cert-img img{width:100%;height:100%;object-fit:contain;display:block}
.cert .cert-cap{padding:14px 4px 4px;font-size:15px;font-weight:700;color:var(--navy-900);text-align:center;white-space:nowrap}

/* ---------- RESPONSIVE ---------- */
@media (max-width:960px){
  .db-grid{grid-template-columns:repeat(2,1fr);gap:30px}
  .prod-grid,.why-grid{grid-template-columns:repeat(2,1fr)}
  .sol-grid,.ct-grid,.two-col{grid-template-columns:1fr}
  .bb-list{grid-template-columns:repeat(2,1fr)}
  .ft-grid{grid-template-columns:1fr 1fr}
  .quad-grid,.brand-series{grid-template-columns:repeat(2,1fr)}
  .result-band{grid-template-columns:repeat(2,1fr)}
  .layer ul{grid-template-columns:1fr}
  .hero h1{font-size:40px}
  .page-hero h1{font-size:34px}
}
@media (max-width:620px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .burger{display:flex}
  .prod-grid,.why-grid,.db-grid,.bb-list,.ft-grid{grid-template-columns:1fr}
  .quad-grid,.result-band{grid-template-columns:1fr}
  .office-grid{grid-template-columns:1fr !important}
  .why-grid[style*="repeat(3"]{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .hero .sub{font-size:17px}
  section{padding:64px 0}
  .s-head h2{font-size:30px}
  .page-hero h1{font-size:28px}
}

/* ================= 产品中心 · 品牌系列 ================= */
.brand-series{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:8px}
.brand-series .card .body h3{font-size:20px;margin:0 0 10px}
.specrow{display:flex;gap:10px;font-size:14px;line-height:1.9;border-bottom:1px dashed var(--line);padding:8px 0}
.specrow:first-of-type{border-top:1px dashed var(--line)}
.specrow span:first-child{white-space:nowrap;color:var(--navy-500);font-weight:700;min-width:44px}
.specrow span:last-child{color:#3d4b5e}
.more{margin-top:14px}
.more summary{cursor:pointer;color:var(--accent);font-weight:700;font-size:14px;user-select:none}
.more[open] summary{color:var(--blue)}
.more summary::-webkit-details-marker{display:none}
.more .moreply{background:var(--silver);border-radius:10px;padding:12px 14px;margin-top:10px}
.brand-row{display:flex;gap:20px;flex-wrap:wrap;justify-content:center;margin-top:8px}
.brand-row .card{flex:1 1 260px;max-width:340px}
.brand-row .thumb{height:220px}
.brand-row .thumb img,.brand-series .thumb img{object-fit:contain;background:#fff}
.brand-series .thumb{height:225px}
.brand-chip{flex:1 1 240px;max-width:320px;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;text-align:center;background:#fff;box-shadow:0 4px 16px rgba(10,31,68,.05)}
.brand-chip b{display:block;font-size:21px;color:var(--navy-900);margin-bottom:6px}
.brand-chip span{font-size:13px;color:#6b7a8d;letter-spacing:.4px}

/* ================= 焊接方案 · 工作站 ================= */
.ws-grid{display:grid;grid-template-columns:1fr;gap:34px;margin-top:10px;align-items:stretch}
.ws-grid .card{margin:0;display:flex;flex-direction:row;align-items:stretch;overflow:hidden}
.ws-grid .card .thumb{flex:1 1 52%;position:relative;min-height:100%;background:#eef1f6}
.ws-grid .card .thumb img{object-fit:cover;width:100%;height:100%;position:absolute;inset:0}
.ws-grid .card .body{flex:1 1 48%;padding:40px 40px;display:flex;flex-direction:column;justify-content:center;box-sizing:border-box}
.ws-grid .card .body h3{font-size:26px;margin:0 0 8px}
.ws-grid .card .thumb .badge{position:absolute;top:16px;left:16px;z-index:2}
.ws-grid .sol-list{margin-top:8px}
.ws-grid .sol-item{padding:14px 0;border-bottom:1px dashed var(--line)}
.ws-grid .sol-item:last-child{border-bottom:none}
@media(max-width:860px){.ws-grid .card{flex-direction:column}.ws-grid .card .thumb{height:300px;flex:none}.ws-grid .card .thumb img{position:static;height:100%}.ws-grid .card .body{padding:24px}}
@media(max-width:620px){.brand-series{grid-template-columns:1fr}.brand-row{gap:14px}}

/* ================= 案例库 · 两大板块 ================= */
.casecat-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:10px;align-items:stretch}
.casecat{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:0 6px 22px rgba(10,31,68,.07)}
.casecat-head{display:flex;gap:18px;align-items:center;padding:26px 28px 8px}
.cc-icon{flex:none;width:58px;height:58px;border-radius:14px;background:linear-gradient(135deg,var(--navy-700),var(--blue));color:#fff;display:flex;align-items:center;justify-content:center}
.cc-icon svg{width:30px;height:30px}
.casecat-head h3{font-size:24px;color:var(--navy-900);margin:0 0 6px}
.casecat-head p{font-size:14px;color:#5b6b7d;margin:0;line-height:1.7}
.casecat-media{padding:18px 28px 8px}
.casecat-media .ph{height:240px;border:1.5px dashed var(--line);border-radius:12px;background:#f7f9fc;display:flex;align-items:center;justify-content:center;color:#9aa8ba;font-size:14px}
.casecat-meta{padding:14px 28px 26px;font-size:14px;color:#3d4b5e;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.casecat-meta span{white-space:nowrap;background:var(--silver);border-radius:20px;padding:5px 14px;font-weight:700;color:var(--navy-600)}
@media(max-width:860px){.casecat-grid{grid-template-columns:1fr}}