/* ============ BENHUO TECH — style.css ============ */
:root{
  --bg:#0a0e14;
  --bg2:#0e141d;
  --panel:#121a26;
  --panel2:#16202e;
  --line:rgba(255,255,255,.08);
  --txt:#e8edf4;
  --txt2:#9aa7b8;
  --fire1:#ffb347;
  --fire2:#ff6a1a;
  --fire3:#ff3d00;
  --grad:linear-gradient(135deg,#ffb347,#ff3d00);
  --radius:14px;
  --max:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  background:var(--bg);color:var(--txt);line-height:1.6;overflow-x:hidden;
}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--fire2);color:#fff}

/* ---------- Header ---------- */
.header{
  position:fixed;inset-inline:0;top:0;z-index:100;
  background:rgba(10,14,20,.82);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header.scrolled{background:rgba(10,14,20,.95)}
.header-inner{display:flex;align-items:center;gap:28px;height:66px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:19px;letter-spacing:.5px}
.logo-text b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav{display:flex;gap:26px;margin-inline-start:auto}
.nav a{font-size:14.5px;color:var(--txt2);transition:.2s;position:relative;padding:6px 0}
.nav a:hover{color:var(--txt)}
.nav a::after{content:"";position:absolute;bottom:0;inset-inline-start:0;width:0;height:2px;background:var(--grad);transition:.25s}
.nav a:hover::after{width:100%}
.lang-select{
  background:var(--panel);color:var(--txt);border:1px solid var(--line);
  border-radius:8px;padding:7px 10px;font-size:13.5px;cursor:pointer;outline:none;
}
.burger{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px}
.burger span{display:block;width:22px;height:2px;background:var(--txt);border-radius:2px;transition:.3s}
.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)}
.lang-wrap-mobile{display:none}

/* ---------- Hero ---------- */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  padding:130px 0 60px;overflow:hidden;
}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.grid-lines{
  position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,106,26,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,106,26,.05) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,#000 40%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,#000 40%,transparent 100%);
}
.hero-drone{
  position:absolute;inset-inline-end:4%;top:18%;width:min(46vw,560px);opacity:.5;
  animation:hover 5s ease-in-out infinite;
}
@keyframes hover{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}
.rotor{animation:spin 1.1s linear infinite;transform-origin:center;transform-box:fill-box}
@keyframes spin{to{transform:rotate(360deg)}}
.hero-content{position:relative;z-index:2;max-width:860px}
.hero-badge{
  display:inline-block;padding:7px 18px;border:1px solid rgba(255,106,26,.45);
  border-radius:99px;color:var(--fire1);font-size:13.5px;letter-spacing:1px;
  background:rgba(255,106,26,.08);margin-bottom:22px;
}
.hero h1{font-size:clamp(30px,4.6vw,54px);line-height:1.22;font-weight:800;display:grid;gap:8px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin:22px 0 30px;color:var(--txt2);font-size:16.5px;max-width:640px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  padding:13px 34px;border-radius:10px;font-size:15.5px;font-weight:600;
  transition:.25s;display:inline-block;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 28px rgba(255,61,0,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(255,61,0,.5)}
.btn-ghost{border:1px solid rgba(255,255,255,.25);color:var(--txt)}
.btn-ghost:hover{border-color:var(--fire2);color:var(--fire1)}
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:56px;
  border-top:1px solid var(--line);padding-top:30px;max-width:760px;
}
.stat b{font-size:clamp(22px,2.6vw,32px);display:block;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:13px;color:var(--txt2)}

/* ---------- Sections ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg2)}
.sec-head{margin-bottom:48px}
.sec-tag{
  display:inline-block;font-size:12px;letter-spacing:3px;color:var(--fire2);
  border:1px solid rgba(255,106,26,.35);padding:4px 14px;border-radius:6px;margin-bottom:14px;
  font-weight:700;
}
.sec-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800}
.sec-sub{color:var(--txt2);margin-top:12px;max-width:720px}

/* About */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px}
.about-grid p{color:var(--txt2);font-size:15.5px;border-inline-start:3px solid var(--fire2);padding-inline-start:20px}
.chain{display:grid;grid-template-columns:repeat(8,1fr);gap:10px;margin-top:52px}
.chain-item{
  background:var(--panel);border:1px solid var(--line);border-radius:10px;
  padding:18px 8px;text-align:center;font-size:14px;transition:.25s;position:relative;
}
.chain-item:hover{border-color:var(--fire2);transform:translateY(-3px)}
.chain-item b{font-weight:600;font-size:13.5px}
.chain-item::after{
  content:"›";position:absolute;inset-inline-end:-12px;top:50%;transform:translateY(-50%);
  color:var(--fire2);font-size:18px;font-weight:700;z-index:1;
}
.chain-item:last-child::after{display:none}

/* Tech */
.tech-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.tech-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 22px;transition:.3s;
}
.tech-card:hover{border-color:rgba(255,106,26,.5);transform:translateY(-4px);box-shadow:0 14px 34px rgba(0,0,0,.4)}
.tech-ico{font-size:26px;display:block;margin-bottom:14px}
.tech-card h3{font-size:16.5px;margin-bottom:8px}
.tech-card p{font-size:13.5px;color:var(--txt2)}

/* Advantages */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.adv-pill{
  background:linear-gradient(160deg,var(--panel),var(--panel2));
  border:1px solid var(--line);border-radius:12px;padding:20px 18px;transition:.3s;
}
.adv-pill:hover{border-color:var(--fire2);transform:translateY(-3px)}
.adv-pill b{display:block;font-size:16px;margin-bottom:5px;color:var(--fire1)}
.adv-pill span{font-size:13px;color:var(--txt2)}

/* Products */
.cat{margin-bottom:58px}
.cat h3{
  display:flex;align-items:center;gap:14px;font-size:21px;margin-bottom:8px;
}
.cat h3 i{
  font-style:normal;font-size:13px;color:var(--fire2);border:1px solid rgba(255,106,26,.4);
  padding:2px 10px;border-radius:6px;letter-spacing:1px;
}
.cat > p{color:var(--txt2);font-size:14.5px;margin-bottom:22px}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;transition:.3s;position:relative;overflow:hidden;
}
.card::before{
  content:"";position:absolute;top:0;inset-inline-start:0;width:100%;height:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:inset-inline-start;transition:.35s;
}
.card:hover::before{transform:scaleX(1)}
.card:hover{transform:translateY(-4px);border-color:rgba(255,106,26,.45);box-shadow:0 14px 30px rgba(0,0,0,.4)}
.card h4{font-size:17px;margin-bottom:6px}
.card .tag{
  display:inline-block;font-size:11.5px;color:var(--fire1);
  background:rgba(255,106,26,.1);border:1px solid rgba(255,106,26,.3);
  padding:2px 10px;border-radius:99px;margin-bottom:14px;
}
.chips{display:flex;flex-wrap:wrap;gap:7px}
.chips span{
  font-size:12px;color:var(--txt2);background:rgba(255,255,255,.05);
  border:1px solid var(--line);padding:3px 9px;border-radius:6px;font-variant-numeric:tabular-nums;
}

/* Solutions */
.sol-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.sol-card{
  background:linear-gradient(160deg,var(--panel),var(--panel2));
  border:1px solid var(--line);border-radius:12px;padding:30px 14px;
  text-align:center;transition:.3s;
}
.sol-card:hover{border-color:var(--fire2);transform:translateY(-4px)}
.sol-card span{font-size:30px;display:block;margin-bottom:12px}
.sol-card b{font-size:15.5px;font-weight:600}

/* Cooperation */
.coop-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.coop-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 20px;transition:.3s;
}
.coop-card:hover{border-color:var(--fire2);transform:translateY(-4px)}
.coop-card b{display:block;font-size:16.5px;margin-bottom:10px;color:var(--fire1)}
.coop-card p{font-size:13.5px;color:var(--txt2)}

/* ---------- Footer / Contact ---------- */
.footer{background:#070b10;border-top:1px solid var(--line);padding:70px 0 0}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:50px;align-items:start}
.footer-brand p{color:var(--txt2);font-size:14px;margin-top:18px;max-width:440px}
.foot-web{margin-top:12px !important;color:var(--fire1) !important}
.qr-zone{text-align:center}
.qr-title{font-size:17px;font-weight:700;margin-bottom:22px}
.qr-cards{display:flex;gap:22px;justify-content:center;flex-wrap:wrap}
.qr-card{
  background:#fff;border-radius:14px;padding:14px 14px 12px;width:180px;
  transition:.3s;display:flex;flex-direction:column;align-items:center;gap:8px;
}
.qr-card:hover{transform:translateY(-5px);box-shadow:0 14px 34px rgba(0,0,0,.5)}
.qr-card img{width:100%;border-radius:6px}
.qr-card span{font-size:14px;font-weight:700;color:#0a0e14;display:flex;align-items:center;gap:6px}
.qr-ws:hover{outline:2px solid #25D366}
.qr-tg:hover{outline:2px solid #29A9EB}
.qr-note{margin-top:18px;font-size:13px;color:var(--txt2)}
.foot-bar{
  margin-top:56px;border-top:1px solid var(--line);padding:20px 0;
  font-size:12.5px;color:#6b7684;text-align:center;
}

/* ---------- Reveal animation ---------- */
html.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
html.js .reveal.in{opacity:1;transform:none}

/* ---------- RTL (Arabic) ---------- */
[dir="rtl"] .chain-item::after{content:"‹"}
[dir="rtl"] .card::before{transform-origin:right}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  .tech-grid{grid-template-columns:repeat(3,1fr)}
  .cards{grid-template-columns:repeat(3,1fr)}
  .adv-grid{grid-template-columns:repeat(3,1fr)}
  .sol-grid{grid-template-columns:repeat(3,1fr)}
  .coop-grid{grid-template-columns:repeat(3,1fr)}
  .chain{grid-template-columns:repeat(4,1fr)}
  .chain-item:nth-child(4)::after{display:none}
}
@media (max-width:767px){
  .section{padding:64px 0}
  .burger{display:flex}
  .nav{
    position:fixed;inset-inline:0;top:66px;flex-direction:column;
    background:rgba(10,14,20,.98);padding:26px 28px 30px;gap:18px;
    border-bottom:1px solid var(--line);
    transform:translateY(-130%);transition:.35s;margin:0;
  }
  .nav.open{transform:none}
  .lang-pc{display:none}
  .lang-wrap-mobile{display:block;margin-top:8px}
  .lang-wrap-mobile .lang-select{width:100%;padding:12px}
  .hero{padding-top:110px;min-height:auto}
  .hero-drone{opacity:.25;top:auto;bottom:4%}
  .stats{grid-template-columns:repeat(2,1fr);gap:22px}
  .about-grid{grid-template-columns:1fr;gap:22px}
  .tech-grid{grid-template-columns:repeat(2,1fr)}
  .cards{grid-template-columns:repeat(2,1fr)}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .sol-grid{grid-template-columns:repeat(2,1fr)}
  .coop-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr;gap:40px}
  .qr-cards{gap:16px}
  .qr-card{width:150px}
}
@media (max-width:430px){
  .cards{grid-template-columns:1fr}
  .tech-grid{grid-template-columns:1fr}
  .coop-grid{grid-template-columns:1fr}
  .chain{grid-template-columns:repeat(2,1fr)}
  .chain-item::after{display:none !important}
}

/* ============ V2 多页版新增 ============ */

/* Hero 流光背景（AI 配图 + 动态渐变叠加） */
.hero::before{
  content:"";position:absolute;inset:0;
  background:url("../assets/img/ai-hero.jpg") center/cover no-repeat;
  opacity:.38;animation:heroGlow 14s ease-in-out infinite alternate;
}
@keyframes heroGlow{
  0%{filter:hue-rotate(0deg) saturate(1);transform:scale(1)}
  100%{filter:hue-rotate(-18deg) saturate(1.25);transform:scale(1.06)}
}
.hero-drone{opacity:.32}

/* 栏目页横幅 */
.page-banner{
  position:relative;padding:150px 0 70px;overflow:hidden;
  background:linear-gradient(140deg,#0c1220 40%,#1a1006);
}
.page-banner .pb-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.35;animation:heroGlow 16s ease-in-out infinite alternate;
}
.page-banner .container{position:relative;z-index:2}
.page-banner h1{font-size:clamp(28px,3.6vw,44px);font-weight:800;margin-bottom:12px}
.page-banner h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.page-banner p{color:var(--txt2);max-width:760px;font-size:15.5px}
.crumb{font-size:13px;color:var(--txt2);margin-bottom:16px;letter-spacing:.5px}
.crumb a{color:var(--fire1)}
.crumb a:hover{text-decoration:underline}

/* 产品线大磁贴（products.html / 首页预览） */
.tile-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tile{
  position:relative;border-radius:16px;overflow:hidden;min-height:300px;
  border:1px solid var(--line);display:flex;flex-direction:column;justify-content:flex-end;
  transition:.35s;background:var(--panel);
}
.tile:hover{transform:translateY(-6px);border-color:rgba(255,106,26,.55);box-shadow:0 18px 44px rgba(0,0,0,.5)}
.tile img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-fit:contain;
  padding:26px 26px 92px;background:radial-gradient(ellipse at 50% 35%,#1a2333 0%,#0d1119 75%);
  transition:.4s;
}
.tile:hover img{transform:scale(1.05)}
.tile-info{
  position:relative;z-index:2;padding:16px 20px;
  background:linear-gradient(transparent,rgba(7,10,16,.92) 40%);
}
.tile-info h3{font-size:18px;margin-bottom:4px}
.tile-info p{font-size:13px;color:var(--txt2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tile-num{
  position:absolute;top:14px;inset-inline-start:16px;z-index:2;font-size:12px;font-weight:700;
  color:var(--fire1);border:1px solid rgba(255,106,26,.4);background:rgba(10,14,20,.6);
  padding:3px 11px;border-radius:99px;letter-spacing:1px;
}

/* 产品详情大卡（栏目页） */
.pd-card{
  display:grid;grid-template-columns:0.9fr 1.1fr;gap:34px;align-items:center;
  background:var(--panel);border:1px solid var(--line);border-radius:18px;
  padding:34px;margin-bottom:30px;transition:.3s;
}
.pd-card:hover{border-color:rgba(255,106,26,.5);box-shadow:0 16px 40px rgba(0,0,0,.45)}
.pd-img{
  background:radial-gradient(ellipse at 50% 45%,#1a2333 0%,#0d1119 78%);
  border-radius:14px;padding:22px;display:flex;align-items:center;justify-content:center;
}
.pd-img img{max-height:340px;object-fit:contain}
.pd-body h3{font-size:24px;margin-bottom:8px}
.pd-body .tag{
  display:inline-block;font-size:12px;color:var(--fire1);
  background:rgba(255,106,26,.1);border:1px solid rgba(255,106,26,.3);
  padding:3px 12px;border-radius:99px;margin-bottom:16px;
}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.chips span{
  font-size:12.5px;color:var(--txt2);background:rgba(255,255,255,.05);
  border:1px solid var(--line);padding:4px 11px;border-radius:7px;font-variant-numeric:tabular-nums;
}
.spec-table{width:100%;border-collapse:collapse;font-size:14px}
.spec-table caption{
  caption-side:top;text-align:start;font-weight:700;color:var(--fire1);
  font-size:13.5px;letter-spacing:1px;margin-bottom:8px;text-transform:uppercase;
}
.spec-table td{padding:9px 12px;border-bottom:1px dashed rgba(255,255,255,.09)}
.spec-table td:first-child{color:var(--txt2);width:44%}
.spec-table td:last-child{font-weight:600;font-variant-numeric:tabular-nums}
.spec-table tr:last-child td{border-bottom:none}

/* 工厂图墙 */
.factory-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:44px}
.factory-strip .fbox{position:relative;border-radius:14px;overflow:hidden;border:1px solid var(--line);aspect-ratio:16/9.2}
.factory-strip img{width:100%;height:100%;object-fit:cover;transition:.4s}
.factory-strip .fbox:hover img{transform:scale(1.06)}
.factory-strip .fcap{
  position:absolute;inset-inline:0;bottom:0;padding:26px 14px 10px;font-size:13px;
  background:linear-gradient(transparent,rgba(7,10,16,.9));font-weight:600;
}

/* 动态火焰分割条 */
.fire-line{
  height:3px;border:none;margin:0;
  background:linear-gradient(90deg,transparent,#ffb347,#ff3d00,#ffb347,transparent);
  background-size:200% 100%;animation:fireMove 3s linear infinite;
}
@keyframes fireMove{to{background-position:200% 0}}

@media (max-width:991px){
  .tile-grid{grid-template-columns:repeat(2,1fr)}
  .pd-card{grid-template-columns:1fr;gap:22px;padding:24px}
  .pd-img img{max-height:260px}
  .factory-strip{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){
  .tile-grid{grid-template-columns:1fr}
  .factory-strip{grid-template-columns:1fr}
}

/* ===== V2.1 栏目页增补（尧哥要求：栏目页加料、大气正规） ===== */
.sol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.sol-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--panel);display:flex;flex-direction:column;transition:transform .3s,border-color .3s,box-shadow .3s}
.sol-card:hover{transform:translateY(-5px);border-color:rgba(255,106,26,.5);box-shadow:0 16px 40px rgba(0,0,0,.45)}
.sol-card>img{width:100%;height:190px;object-fit:cover;display:block}
.sol-body{padding:20px 20px 18px;flex:1;display:flex;flex-direction:column}
.sol-body h3{font-size:18px;margin-bottom:8px}
.sol-body>p{font-size:13.5px;color:var(--txt2);line-height:1.65;flex:1}
.reco-row{margin-top:14px;padding-top:12px;border-top:1px dashed var(--line);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.reco-label{font-size:12px;color:var(--txt2)}
.reco-chip{font-size:12px;color:var(--fire1);border:1px solid rgba(255,106,26,.45);border-radius:999px;padding:3px 11px;text-decoration:none;transition:.25s;white-space:nowrap}
.reco-chip:hover{background:rgba(255,106,26,.14);border-color:var(--fire2)}
.show-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px;flex-wrap:wrap}
.show-head .sec-head{margin-bottom:0}
.show-more{flex-shrink:0}
.stats{display:flex;gap:40px;flex-wrap:wrap}
.stat b{font-size:clamp(22px,2.6vw,32px);display:block;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:13px;color:var(--txt2)}
@media(max-width:991px){.sol-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.sol-grid{grid-template-columns:1fr}}

/* ===== V2.2 二维码大图弹层（点击码卡放大，客户扫码） ===== */
.qr-card{cursor:pointer}
.qr-lightbox{position:fixed;inset:0;background:rgba(6,8,12,.9);display:flex;align-items:center;justify-content:center;z-index:9999;opacity:0;pointer-events:none;transition:opacity .25s}
.qr-lightbox.open{opacity:1;pointer-events:auto}
.qr-lightbox img{width:min(72vw,440px);max-height:80vh;height:auto;background:#fff;padding:18px;border-radius:12px;box-shadow:0 24px 80px rgba(0,0,0,.65)}

/* ===== V2.3 移动端 UI 打磨（尧哥：移动端优化到最漂亮） ===== */
body.menu-open{overflow:hidden}
@media (max-width:767px){
  /* 头部：更紧凑 + 菜单项大触摸区 */
  .header-inner{height:60px;gap:14px}
  .logo{font-size:18px}
  .nav{top:60px;padding:18px 24px 26px;gap:0;border-radius:0 0 18px 18px;box-shadow:0 24px 50px rgba(0,0,0,.55)}
  .nav a{font-size:16px;padding:13px 4px;border-bottom:1px dashed rgba(255,255,255,.07)}
  .nav a:last-of-type{border-bottom:none}
  .lang-wrap-mobile{margin-top:16px}
  /* Hero：标题不断字、副标更透气 */
  .hero{padding:92px 0 48px}
  .hero h1{font-size:clamp(23px,6.6vw,30px);line-height:1.32;gap:5px}
  .hero-sub{font-size:15px;margin:16px 0 24px;line-height:1.8}
  .hero-badge{font-size:12px;padding:6px 14px;margin-bottom:16px;letter-spacing:.5px}
  .hero-cta .btn{flex:1;min-width:0;text-align:center;padding:13px 8px;font-size:14.5px}
  .hero-drone{opacity:.16}
  /* 数据条：修复 flex/grid 冲突 → 规整 2x2 */
  .stats{display:grid;grid-template-columns:repeat(2,1fr);gap:20px 14px;margin-top:38px;padding-top:24px}
  .stat b{font-size:24px}
  .stat span{font-size:12.5px}
  /* 区块节奏 */
  .section{padding:56px 0}
  .sec-head{margin-bottom:30px}
  .sec-head h2{line-height:1.3}
  .sec-sub{font-size:14px}
  /* 卡片：收紧留白 */
  .tech-grid,.adv-grid{gap:12px}
  .tech-card,.adv-pill{padding:20px 16px}
  .tech-ico{font-size:24px;margin-bottom:10px}
  .tech-card h3,.adv-pill b{font-size:15px}
  .tech-card p,.adv-pill span{font-size:13px;line-height:1.65}
  /* 产品磁贴 */
  .tile{min-height:248px;border-radius:14px}
  .tile img{padding:18px 18px 84px}
  .tile-info{padding:14px 16px}
  .tile-info h3{font-size:17px}
  /* 详情卡与规格表 */
  .pd-card{padding:20px;border-radius:16px;margin-bottom:22px;gap:18px}
  .pd-img{padding:16px}
  .pd-img img{max-height:215px}
  .pd-body h3{font-size:20px}
  .spec-table{font-size:13.5px}
  .spec-table td{padding:8px 10px}
  /* 栏目横幅 */
  .page-banner{padding:118px 0 52px}
  .page-banner p{font-size:14.5px}
  /* 解决方案卡 */
  .sol-card>img{height:158px}
  .sol-body{padding:16px 16px 15px}
  .sol-body h3{font-size:16px}
  .sol-body>p{font-size:13px}
  /* 页脚 */
  .footer{padding-top:52px}
  .qr-title{font-size:16px;margin-bottom:16px}
  .qr-card{width:148px;padding:12px 12px 10px;border-radius:12px}
  .foot-bar{padding:18px 0 calc(18px + env(safe-area-inset-bottom))}
  /* 二维码弹层：手机上更大更好扫 */
  .qr-lightbox img{width:min(86vw,400px);padding:14px;border-radius:10px}
  /* 触摸反馈 */
  .btn:active{transform:scale(.97)}
  .tile:active,.card:active{transform:none}
}
@media (max-width:430px){
  .hero h1{font-size:22px}
  .hero-cta{gap:10px}
  .stat b{font-size:21px}
  .chain{gap:8px}
}