/* ============================================
   优荟加科技 (uhplus) 企业官网
   主题色: 橙色 #F97316
   设计: B2B 企业站，全宽模块化
   ============================================ */

:root {
  --c-primary: #F97316;
  --c-primary-d: #EA580C;
  --c-primary-l: #FDBA74;
  --c-primary-bg: #FFF7ED;

  --c-text: #1A1A2E;
  --c-text-2: #555;
  --c-text-3: #999;

  --c-bg: #fff;
  --c-bg-gray: #F7F8FA;
  --c-bg-dark: #181E2C;
  --c-bg-footer: #0F172A;

  --c-border: #E8ECF1;
  --c-border-light: #F0F2F5;

  --font: "Microsoft YaHei","PingFang SC",-apple-system,BlinkMacSystemFont,sans-serif;
  --max-w: 1200px;
  --nav-h: 72px;

  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.04);
  --shadow: 0 2px 12px rgba(0,0,0,.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.10);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);font-size:15px;line-height:1.7;
  color:var(--c-text);background:var(--c-bg);
  overflow-x:hidden;-webkit-font-smoothing:antialiased;
  position:relative;
}
body::before{
  content:'';position:fixed;inset:0;
  background-image:url('../images/scenarios/mall.svg');
  background-repeat:no-repeat;
  background-position:center center;
  background-size:600px 600px;
  opacity:.04;
  pointer-events:none;
  z-index:9999;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
button{cursor:pointer;border:none;background:none;font:inherit;color:inherit}

/* ---------- Common ---------- */
.sec{padding:100px 0}
.sec-gray,.section-gray{background:var(--c-bg-gray)}
.sec-inner,.section-inner{max-width:var(--max-w);margin:0 auto;padding:0 24px}

.sec-head{text-align:center;margin-bottom:60px}
.sec-tag{
  display:inline-block;font-size:13px;font-weight:600;
  color:var(--c-primary);background:var(--c-primary-bg);
  padding:6px 16px;border-radius:20px;margin-bottom:16px;letter-spacing:.04em;
}
.sec-head h2{font-size:36px;font-weight:700;color:var(--c-text);margin-bottom:12px;letter-spacing:-.01em}
.sec-head p{font-size:16px;color:var(--c-text-2);max-width:560px;margin:0 auto}

.fade-up{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}
.fade-up.visible{opacity:1;transform:translateY(0)}

/* ---------- HEADER ---------- */
.header{
  position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-h);
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;transition:all .28s ease;
}
.header.scrolled{
  background:rgba(255,255,255,.97);
  border-bottom-color:var(--c-border);box-shadow:0 1px 8px rgba(0,0,0,.06);
}
.header-inner{max-width:var(--max-w);height:100%;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}

.logo{display:flex;align-items:center}
.logo-img{height:38px;width:auto;display:block}

.nav{display:flex;align-items:center;gap:4px}
.nav-item{padding:8px 18px;font-size:14px;font-weight:500;color:var(--c-text-2);border-radius:6px;transition:all .18s ease}
.nav-item:hover{color:var(--c-primary);background:var(--c-primary-bg)}
.nav-item.active{color:var(--c-primary);font-weight:600}

.menu-btn{display:none;flex-direction:column;gap:5px;padding:6px}
.menu-btn span{display:block;width:22px;height:2px;background:var(--c-text);border-radius:2px;transition:all .28s ease}
.menu-btn.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.menu-btn.active span:nth-child(2){opacity:0}
.menu-btn.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ---------- HERO ---------- */
.hero{
  position:relative;min-height:100vh;
  padding:calc(var(--nav-h) + 60px) 0 40px;
  display:flex;flex-direction:column;align-items:center;overflow:hidden;
  background:linear-gradient(175deg,#FFF7ED 0%,#fff 40%,#fff 100%);
}
.hero-bg{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.hero-dots{
  position:absolute;top:20%;right:8%;
  width:360px;height:360px;
  background:radial-gradient(circle,rgba(249,115,22,.15) 1px,transparent 1px);
  background-size:24px 24px;
}
.hero-circle{position:absolute;border-radius:50%;background:rgba(249,115,22,.06)}
.hero-circle-1{width:500px;height:500px;top:-120px;right:-160px}

.hero-inner{
  position:relative;z-index:2;max-width:var(--max-w);width:100%;flex:1;
  margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:0px;
}
.hero-left{flex:3;max-width:none;display:flex;flex-direction:column;align-items:flex-start;text-align:left;}
.hero-left > * {margin-left:30%}
.hero-badge{
  display:inline-block;font-size:13px;font-weight:600;
  color:var(--c-primary);background:var(--c-primary-bg);
  border:1px solid rgba(249,115,22,.2);
  padding:6px 18px;border-radius:20px;margin-bottom:24px;
}
.hero-title{font-size:48px;font-weight:800;line-height:1.15;color:var(--c-text);margin-bottom:20px;letter-spacing:-.02em;align-self:stretch;text-align:left}
.hero-title em{color:var(--c-primary);font-style:normal}
.hero-desc{font-size:17px;color:var(--c-text-2);line-height:1.8;margin-bottom:32px;text-align:left}
.hero-btns{display:flex;gap:14px;margin-bottom:40px}

.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 32px;font-size:15px;font-weight:600;border-radius:8px;transition:all .28s ease;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--c-primary),var(--c-primary-d));color:#fff;box-shadow:0 4px 16px rgba(249,115,22,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(249,115,22,.4)}
.btn-outline{border:2px solid var(--c-border);color:var(--c-text)}
.btn-outline:hover{border-color:var(--c-primary);color:var(--c-primary)}

.hero-stats{display:flex;gap:48px}
.hero-stat strong{font-size:32px;font-weight:800;color:var(--c-text);line-height:1}
.hero-stat strong span{color:var(--c-primary);font-size:24px}
.hero-stat>span{display:block;font-size:13px;color:var(--c-text-3);margin-top:4px}

.hero-right{position:relative;flex:2;height:420px;display:flex;align-items:center;justify-content:center}
.hero-float{
  position:absolute;z-index:3;
  background:#fff;border-radius:12px;box-shadow:var(--shadow-md);
  padding:10px 18px;display:flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;animation:float 3s ease-in-out infinite;
}
.float-icon{width:28px;height:28px;object-fit:contain;border-radius:4px}
/* 5 floats: right column stack */
.hero-float-1{top:2%;right:calc(10% + 200px);animation-delay:0s}
.hero-float-2{top:22%;right:calc(10% + 200px);animation-delay:0.6s}
.hero-float-3{top:42%;right:calc(10% + 200px);animation-delay:1.2s}
.hero-float-4{bottom:22%;right:calc(10% + 200px);animation-delay:1.8s}
.hero-float-5{bottom:2%;right:calc(10% + 200px);animation-delay:2.4s}

.hero-phone{
  position:absolute;right:10%;top:50%;transform:translateY(-50%);
  z-index:2;width:245px;height:462px;
  background:#fff;border:6px solid #1A1A2E;border-radius:36px;
  box-shadow:0 0 0 3px #333, 0 20px 50px rgba(0,0,0,.25);
  overflow:hidden;
}
/* 顶部刘海 */
.hero-phone::before{
  content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);
  z-index:5;width:90px;height:24px;
  background:#1A1A2E;border-radius:0 0 16px 16px;
}
.hero-phone-img{width:100%;height:100%;object-fit:cover;display:block}

/* ---------- HERO NEWS ---------- */
.hero-news{
  position:relative;z-index:2;max-width:var(--max-w);width:100%;
  margin:0 auto;padding:60px 24px 60px;flex-shrink:0;
}
.hero-news .sec-head{margin-bottom:24px}
.hero-news .news-carousel{padding:0 40px}
.hero-news .news-card{flex:0 0 calc(33.333% - 14px)}

@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* ---------- NEWS CAROUSEL ---------- */
.news-carousel{position:relative;overflow:hidden}

/* ---------- TRIPLE ---------- */
.arch-img{text-align:center;margin-bottom:64px;position:relative}
.arch-img img{max-height:520px;width:auto;max-width:100%;object-fit:contain;margin:0 auto;border-radius:var(--radius-xl);box-shadow:0 20px 60px rgba(0,0,0,.08)}

/* 架构图 → 三大平台 连接装饰 */
.arch-connector{display:flex;align-items:center;justify-content:center;position:relative;height:48px;margin-bottom:16px}
.arch-connector-line{width:60px;height:2px;background:linear-gradient(90deg,transparent,var(--c-primary-l),transparent)}
.arch-connector-dot{position:absolute;width:8px;height:8px;background:var(--c-primary);border-radius:50%;top:50%;left:50%;transform:translate(-50%,-50%);box-shadow:0 0 12px rgba(249,115,22,.4)}

.triple{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.triple-item{
  position:relative;padding:48px 36px 36px;background:#fff;
  border:1px solid var(--c-border-light);border-radius:var(--radius-xl);
  transition:all .28s ease;overflow:hidden;
}
/* 顶部彩色装饰条 */
.triple-item::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:var(--c-primary)}
.triple-item:nth-child(1)::before{background:#3B82F6}
.triple-item:nth-child(2)::before{background:var(--c-primary)}
.triple-item:nth-child(3)::before{background:#22C55E}
.triple-item:hover{transform:translateY(-8px);box-shadow:0 16px 48px rgba(0,0,0,.10)}
.triple-num{position:absolute;top:16px;right:20px;font-size:56px;font-weight:800;color:rgba(0,0,0,.03);line-height:1}
.triple-icon{width:64px;height:64px;border-radius:16px;display:flex;align-items:center;justify-content:center;margin-bottom:24px}
.triple-icon.blue{background:#EBF4FF;color:#3B82F6}
.triple-icon.orange{background:var(--c-primary-bg);color:var(--c-primary)}
.triple-icon.green{background:#ECFDF5;color:#22C55E}
.triple-item h3{font-size:20px;font-weight:700;margin-bottom:10px}
.triple-item h3 small{font-size:13px;color:var(--c-text-3);font-weight:400}
.triple-item p{color:var(--c-text-2);font-size:15px;margin-bottom:18px}
.triple-item>span{display:inline-block;font-size:13px;color:var(--c-primary);font-weight:600;background:var(--c-primary-bg);padding:4px 12px;border-radius:12px}

/* ---------- PRODUCT SHOWCASE ---------- */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.product-card{
  background:#fff;border:1px solid var(--c-border-light);
  border-radius:var(--radius-xl);overflow:hidden;
  transition:all .28s ease;
}
.product-card:hover{transform:translateY(-8px);box-shadow:0 16px 48px rgba(0,0,0,.10)}
.product-pic{
  height:220px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--c-primary-bg) 0%,#fff 100%);
  padding:24px;
}
.product-pic img{max-width:100%;max-height:100%;object-fit:contain}
.product-info{padding:24px 28px 28px}
.product-info h3{font-size:20px;font-weight:700;margin-bottom:10px;color:var(--c-text)}
.product-info p{font-size:14px;color:var(--c-text-2);line-height:1.7}

/* ---------- BRAND ECOLOGY ---------- */
.brand-section{display:flex;flex-direction:column;gap:48px}
.brand-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:6px;padding:0}
.brand-item{
  display:flex;align-items:center;justify-content:center;
  padding:10px;height:76px;background:var(--c-bg-gray);
  border-radius:var(--radius);transition:all .18s ease;
}
.brand-item:hover{background:#fff;box-shadow:var(--shadow-sm);transform:translateY(-2px)}
.brand-item img{max-width:100%;max-height:44px;object-fit:contain;transition:all .28s ease}
.brand-item:hover img{transform:scale(1.08)}
.brand-item.dark-bg{background:#F97316}
.brand-item.dark-bg:hover{background:#EA580C}

/* client-logos (retained for 合作客户 section) */
.client-logos{text-align:center;margin-bottom:24px}
.client-logos img{max-width:100%;height:auto;object-fit:contain;margin:0 auto}

/* ---------- CUSTOM ---------- */
.custom-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.custom-card{
  text-align:center;padding:32px 20px;background:#fff;
  border:1px solid var(--c-border-light);border-radius:var(--radius-xl);
  transition:all .28s ease;
}
.custom-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.custom-icon{font-size:36px;margin-bottom:14px}
.custom-card h3{font-size:16px;font-weight:700;margin-bottom:8px}
.custom-card p{font-size:13px;color:var(--c-text-2);line-height:1.6}

/* ---------- VALUE ---------- */
.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:40px}
.value-box{
  text-align:center;padding:32px 20px;background:#fff;
  border:1px solid var(--c-border-light);border-radius:var(--radius-xl);
  transition:all .28s ease;
}
.value-box:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.value-icon{font-size:36px;margin-bottom:12px}
.value-box h3{font-size:16px;font-weight:700;margin-bottom:8px;color:var(--c-primary-d)}
.value-box strong{display:block;font-size:18px;color:var(--c-text);margin-bottom:10px}
.value-box p{font-size:13px;color:var(--c-text-2);line-height:1.6}
.value-box em{font-style:normal;font-weight:700;color:var(--c-primary)}

/* Result bar */
.result-bar{
  display:flex;align-items:center;justify-content:center;
  gap:40px;max-width:800px;margin:0 auto;
  padding:32px 40px;background:linear-gradient(135deg,var(--c-primary),var(--c-primary-d));
  border-radius:var(--radius-xl);color:#fff;
}
.result-item{text-align:center;flex:1}
.result-item em{display:block;font-size:28px;font-weight:800;font-style:normal;line-height:1.3}
.result-item span{font-size:13px;opacity:.9}
.result-div{width:1px;height:50px;background:rgba(255,255,255,.25)}

/* ---------- PERSONA ---------- */
.persona-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.persona-card{
  padding:32px;background:#fff;border:1px solid var(--c-border-light);
  border-radius:var(--radius-xl);transition:all .28s ease;
}
.persona-card:hover{box-shadow:var(--shadow-md)}
.persona-head{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.persona-avatar{width:52px;height:52px;border-radius:12px;background:var(--c-bg-gray);display:flex;align-items:center;justify-content:center;overflow:hidden}
.persona-avatar img{width:100%;height:100%;object-fit:contain}
.persona-head h3{font-size:16px;font-weight:700}
.persona-head span{display:inline-block;margin-top:4px;font-size:12px;font-weight:600;color:var(--c-primary);background:var(--c-primary-bg);padding:2px 10px;border-radius:10px}
.persona-card ul{display:flex;flex-direction:column;gap:8px}
.persona-card li{font-size:14px;color:var(--c-text-2);line-height:1.7;padding-left:18px;position:relative}
.persona-card li::before{content:'';position:absolute;left:0;top:10px;width:6px;height:6px;background:var(--c-primary);border-radius:50%}

/* ---------- CERT ---------- */
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cert-item{
  text-align:center;padding:28px 16px 20px;background:#fff;
  border:1px solid var(--c-border-light);border-radius:var(--radius-lg);
  transition:all .28s ease;
}
.cert-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.cert-img{width:72px;height:72px;margin:0 auto 14px}
.cert-img img{width:100%;height:100%;object-fit:contain}
.cert-item p{font-size:12px;color:var(--c-text-2);line-height:1.5}

/* ---------- HONOR ---------- */
.honor-block{margin-top:48px}
.honor-block h3{font-size:22px;font-weight:700;color:var(--c-text);margin-bottom:16px}
.honor-desc{font-size:15px;line-height:1.8;color:var(--c-text-2);margin-bottom:24px}
.honor-pic img{max-width:100%;border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}
.soft-pic img{max-width:100%;border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}

/* ---------- NEWS CAROUSEL ---------- */
.news-track{display:flex;transition:transform .4s ease}
.news-card{
  flex:0 0 calc(33.333% - 14px);margin-right:20px;
  background:#fff;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--c-border-light);transition:all .28s ease;
  text-decoration:none;color:inherit;display:block;
}
.news-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.news-cover{
  width:100%;height:160px;object-fit:cover;display:block;
  background:var(--c-bg-gray);
}
.news-card h4{
  font-size:15px;font-weight:600;color:var(--c-text);
  padding:16px 20px 20px;line-height:1.5;
}
.news-arrow{
  position:absolute;top:50%;transform:translateY(-50%);z-index:2;
  width:36px;height:36px;border-radius:50%;
  background:#fff;border:1px solid var(--c-border);box-shadow:var(--shadow-sm);
  cursor:pointer;font-size:14px;color:var(--c-text);display:flex;
  align-items:center;justify-content:center;transition:all .2s ease;outline:none;
}
.news-arrow:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
.news-prev{left:0}.news-next{right:0}
.news-dots{display:flex;justify-content:center;gap:8px;margin-top:20px}
.news-dot{
  width:8px;height:8px;border-radius:50%;background:var(--c-border);
  cursor:pointer;transition:all .2s ease;
}
.news-dot.active{background:var(--c-primary);width:24px;border-radius:4px}

/* ---------- FOOTER ---------- */
.footer{background:var(--c-bg-dark);color:#fff}
.footer-main{padding:64px 0 48px}
.footer-inner{max-width:var(--max-w);margin:0 auto;padding:0 24px}

.footer .footer-inner:not(.footer-bar .footer-inner){
  display:grid;grid-template-columns:1.2fr 1fr 1fr 1.1fr;gap:48px;
}

.footer-logo{display:flex;align-items:center;margin-bottom:16px}
.footer-logo-img{height:34px;width:auto;display:block;filter:brightness(0) invert(1)}
.footer-about p{font-size:13px;color:#8892A0;line-height:2}

.footer-col h4{font-size:15px;font-weight:600;margin-bottom:18px;color:#fff}
.footer-col a{display:block;font-size:13px;color:#8892A0;padding:4px 0;transition:color .18s ease}
.footer-col a:hover{color:var(--c-primary-l)}

.contact-box{padding:20px;background:rgba(255,255,255,.04);border:1px dashed rgba(255,255,255,.1);border-radius:var(--radius)}
.contact-tel{font-size:13px;color:#8892A0;margin-bottom:6px}
.contact-addr{font-size:12px;color:#8892A0;line-height:1.7;margin-bottom:8px}
.contact-domain{font-size:14px;font-weight:600;color:var(--c-primary-l)}

.footer-bar{border-top:1px solid rgba(255,255,255,.06);padding:20px 0}
.footer-bar .footer-inner{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--c-primary)}
.footer-bar a{color:var(--c-primary);transition:color .18s ease}
.footer-bar a:hover{color:var(--c-primary-l);text-decoration:underline}

/* ---------- MODAL ---------- */
.modal-overlay{
  position:fixed;inset:0;z-index:9999;
  background:rgba(0,0,0,.55);display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:all .3s ease;
}
.modal-overlay.active{opacity:1;visibility:visible}
.modal-box{
  background:#fff;border-radius:16px;padding:40px 36px 32px;
  max-width:360px;width:90%;text-align:center;
  position:relative;transform:translateY(20px);
  transition:transform .3s ease;
}
.modal-overlay.active .modal-box{transform:translateY(0)}
.modal-close{
  position:absolute;top:12px;right:16px;
  width:32px;height:32px;border:none;background:none;
  font-size:24px;color:var(--c-text-3);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:color .2s;
}
.modal-close:hover{color:var(--c-text)}
.modal-box h3{font-size:20px;font-weight:700;margin-bottom:24px;color:var(--c-text)}
.modal-qr{width:160px;height:160px;margin:0 auto 20px;border:1px solid var(--c-border-light);border-radius:12px;overflow:hidden}
.modal-qr img{width:100%;height:100%;object-fit:contain}
.modal-name{font-size:18px;font-weight:700;color:var(--c-text);margin-bottom:4px}
.modal-title{font-size:14px;color:var(--c-text-2);margin-bottom:16px}
.modal-tip{font-size:12px;color:var(--c-text-3)}

/* ---------- BACK TOP ---------- */
.back-top{
  position:fixed;bottom:28px;right:28px;z-index:900;
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  background:var(--c-primary);color:#fff;border-radius:var(--radius);
  box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;
  transform:translateY(12px);transition:all .28s ease;
}
.back-top.visible{opacity:1;pointer-events:auto;transform:translateY(0)}
.back-top:hover{background:var(--c-primary-d);transform:translateY(-2px)}

/* ==================== RESPONSIVE ==================== */

@media (max-width:1024px){
  .sec{padding:70px 0}
  .sec-head h2{font-size:30px}
  .hero-title{font-size:38px}
  .hero-inner{gap:32px}
  .hero-right{height:340px}
  .hero-phone{width:203px;height:462px;right:2%}
  .hero-float{font-size:12px;padding:10px 14px}
  .hero-stats{gap:32px}
  .hero-left > * {margin-left:10%}
  .hero-float-1{top:2%;right:calc(10% + 160px)}
  .hero-float-2{top:22%;right:calc(10% + 160px)}
  .hero-float-3{top:42%;right:calc(10% + 160px)}
  .hero-float-4{bottom:22%;right:calc(10% + 160px)}
  .hero-float-5{bottom:2%;right:calc(10% + 160px)}

  .arch-img img{max-height:380px}
  .arch-connector{height:36px;margin-bottom:12px}
  .cert-grid{grid-template-columns:repeat(4,1fr)}
  .triple{grid-template-columns:repeat(3,1fr);gap:16px}
  .product-grid{grid-template-columns:repeat(3,1fr);gap:16px}
  .product-pic{height:180px}
  .triple-item{padding:36px 24px 28px}
  .triple-icon{width:52px;height:52px;margin-bottom:18px}
  .triple-item h3{font-size:17px}
  .triple-item p{font-size:14px}
  .value-grid{grid-template-columns:repeat(2,1fr)}
  .persona-grid{grid-template-columns:1fr 1fr}
  .custom-grid{grid-template-columns:repeat(2,1fr)}
  .brand-section{gap:36px}
  .brand-grid{grid-template-columns:repeat(4,1fr);padding:0}
  .brand-item{height:68px}
  .brand-item img{max-height:38px}

  .news-carousel{padding:0 36px}
  .news-card{flex:0 0 calc(50% - 12px);margin-right:16px}

  .footer .footer-inner:not(.footer-bar .footer-inner){grid-template-columns:1fr 1fr;gap:32px}
}

@media (max-width:768px){
  :root{--nav-h:60px}
  .sec{padding:56px 0}
  .sec-head{margin-bottom:40px}
  .sec-head h2{font-size:26px}
  .sec-head p{font-size:14px}

  .nav{
    position:fixed;top:var(--nav-h);left:0;right:0;
    background:rgba(255,255,255,.98);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
    flex-direction:column;padding:12px 0;
    border-bottom:1px solid var(--c-border);box-shadow:var(--shadow-lg);
    transform:translateY(-100%);opacity:0;pointer-events:none;transition:all .28s ease;
  }
  .nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-item{width:100%;text-align:center;padding:12px}
  .menu-btn{display:flex}

  .hero{padding-top:calc(var(--nav-h) + 32px);padding-bottom:48px;min-height:auto}
  .hero-inner{flex:1 1 auto;flex-direction:column;text-align:center;gap:0px}
  .hero-left{flex:1 1 auto;align-items:center;text-align:center}
  .hero-left > * {margin-left:0}
  .hero-title{font-size:32px;text-align:center}
  .hero-desc{font-size:15px;text-align:center}
  .hero-btns{justify-content:center}
  .hero-stats{justify-content:center}
  .hero-right{flex:1 1 auto;height:280px;width:100%}
  .hero-float{display:none}
  .hero-phone{width:176px;height:380px;right:5%;border-radius:22px}
  .hero-news{padding:0 24px 40px}
  .hero-news .news-card{flex:0 0 calc(50% - 10px)}

  .arch-img img{max-height:300px}
  .arch-connector{height:28px;margin-bottom:8px}
  .cert-grid{grid-template-columns:repeat(2,1fr)}
  .triple{grid-template-columns:1fr}
  .triple-item{padding:32px 20px 24px}
  .triple-icon{width:48px;height:48px;margin-bottom:16px}
  .triple-item h3{font-size:17px}
  .triple-item p{font-size:14px}
  .product-grid{grid-template-columns:1fr;gap:16px}
  .product-pic{height:180px}
  .value-grid{grid-template-columns:repeat(2,1fr)}
  .persona-grid{grid-template-columns:1fr}
  .custom-grid{grid-template-columns:repeat(2,1fr)}
  .result-bar{flex-direction:column;gap:20px;text-align:center}
  .result-div{width:60px;height:1px}
  .brand-section{gap:28px}
  .brand-grid{grid-template-columns:repeat(3,1fr);padding:0}
  .brand-item{height:64px}

  .footer .footer-inner:not(.footer-bar .footer-inner){grid-template-columns:1fr;gap:28px}
  .footer-bar .footer-inner{flex-direction:column;text-align:center;gap:8px}
}

@media (max-width:640px){
  .sec{padding:44px 0}
  .sec-head h2{font-size:22px}
  .hero-title{font-size:28px}
  .hero-right{display:none}
  .hero-news{padding:0 16px 32px}
  .hero-news .news-card{flex:0 0 100%}
  .hero-news .news-arrow{display:none}
  .hero-stats{flex-wrap:wrap;gap:20px;justify-content:center}
  .hero-stats strong{font-size:26px}
  .hero-btns{flex-direction:column}
  .btn{width:100%}

  .arch-img img{max-height:220px}
  .arch-connector{height:24px;margin-bottom:6px}
  .cert-grid{grid-template-columns:1fr 1fr;gap:10px}
  .cert-item{padding:20px 10px 14px}
  .cert-img{width:52px;height:52px}
  .product-grid{grid-template-columns:1fr;gap:16px}
  .product-pic{height:160px}
  .custom-grid{grid-template-columns:1fr}
  .value-grid{grid-template-columns:1fr}
  .brand-section{gap:24px}
  .brand-grid{grid-template-columns:repeat(2,1fr);padding:0}
  .brand-item{height:60px}

  .news-carousel{padding:0}
  .news-card{flex:0 0 100%;margin-right:0}
  .news-arrow{display:none}

  .back-top{bottom:16px;right:16px;width:40px;height:40px}
}