/* ===== Reset & Base ===== */
*,::before,::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;font-size:15px;line-height:1.7;color:#1e293b;background:#f8fafc;overflow-x:hidden}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
button{cursor:pointer;border:none;background:none;font:inherit}
input,textarea,select{font:inherit}

/* ===== CSS Custom Properties ===== */
:root{
  --c-blue:#185fa5;--c-blue-dark:#0c447c;--c-blue-light:#378add;--c-blue-50:#e6f1fb;
  --c-green:#0f6e56;--c-green-light:#1d9e75;--c-green-50:#e1f5ee;
  --c-amber:#ef9f27;--c-amber-50:#faeeda;
  --c-dark:#0a1628;--c-dark-2:#122842;--c-dark-3:#1a3354;
  --c-bg:#f8fafc;--c-white:#fff;--c-text:#1e293b;--c-text-2:#64748b;--c-text-3:#94a3b8;
  --c-border:#e2e8f0;--c-border-2:#cbd5e1;
  --radius-sm:6px;--radius:10px;--radius-lg:16px;--radius-xl:24px;
  --shadow-sm:0 1px 3px rgba(0,0,0,.06);--shadow:0 4px 16px rgba(0,0,0,.08);
  --shadow-lg:0 8px 32px rgba(0,0,0,.12);
  --transition:.25s cubic-bezier(.4,0,.2,1);
}

/* ===== Container & Layout ===== */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-header{text-align:center;margin-bottom:48px}
.section-title{font-size:32px;font-weight:700;color:var(--c-text);margin-bottom:12px;letter-spacing:-.5px}
.section-subtitle{font-size:16px;color:var(--c-text-2);max-width:600px;margin:0 auto}
.section-accent{display:inline-block;width:48px;height:3px;background:linear-gradient(90deg,var(--c-blue),var(--c-green));border-radius:2px;margin-bottom:16px}

/* ===== Typography ===== */
.text-gradient{background:linear-gradient(135deg,var(--c-blue-light),var(--c-green-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.text-mono{font-family:"SF Mono","Fira Code","Consolas",monospace;font-size:.9em}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--radius);font-size:15px;font-weight:600;transition:all var(--transition);white-space:nowrap;letter-spacing:.3px}
.btn-primary{background:var(--c-blue);color:var(--c-white)}
.btn-primary:hover{background:var(--c-blue-dark);transform:translateY(-1px);box-shadow:0 4px 16px rgba(24,95,165,.4)}
.btn-outline{background:transparent;color:var(--c-blue);border:1.5px solid var(--c-blue)}
.btn-outline:hover{background:var(--c-blue);color:var(--c-white)}
.btn-outline-light{background:transparent;color:var(--c-white);border:1.5px solid rgba(255,255,255,.3)}
.btn-outline-light:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.5)}
.btn-green{background:var(--c-green);color:var(--c-white)}
.btn-green:hover{background:var(--c-green-light);transform:translateY(-1px);box-shadow:0 4px 16px rgba(15,110,86,.4)}
.btn-sm{padding:8px 20px;font-size:14px}
.btn-lg{padding:16px 36px;font-size:16px}
.btn-arrow::after{content:"";display:inline-block;width:16px;height:16px;background:currentColor;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M13.172 12l-4.95-4.95 1.414-1.414L16 12l-6.364 6.364-1.414-1.414z'/%3E%3C/svg%3E") center/contain no-repeat;transition:transform var(--transition)}
.btn:hover .btn-arrow::after{transform:translateX(4px)}

/* ===== Header ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:all var(--transition)}
.site-header.scrolled{background:rgba(255,255,255,.98);border-bottom-color:var(--c-border);box-shadow:0 1px 8px rgba(0,0,0,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--c-blue),var(--c-green));border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:var(--c-white);font-size:18px;font-weight:800}
.logo-text{font-size:20px;font-weight:700;color:var(--c-text);letter-spacing:.5px}
.main-nav{display:flex;align-items:center;gap:4px}
.nav-link{padding:8px 16px;font-size:14px;font-weight:500;color:var(--c-text-2);border-radius:var(--radius-sm);transition:all var(--transition)}
.nav-link:hover,.nav-link.active{color:var(--c-blue);background:var(--c-blue-50)}
.desktop-cta{flex-shrink:0}
.lang-switch{display:inline-flex;align-items:center;justify-content:center;width:32px;min-width:32px;height:32px;border-radius:50%;font-size:12px;font-weight:700;color:var(--c-blue);background:var(--c-blue-50);border:1px solid var(--c-blue-50);transition:all var(--transition);flex-shrink:0;text-decoration:none}
.lang-switch:hover{background:var(--c-blue);color:var(--c-white);border-color:var(--c-blue)}
.mobile-cta{display:none}
.menu-toggle{display:none;flex-direction:column;gap:5px;padding:8px;z-index:1001}
.menu-toggle span{display:block;width:24px;height:2px;background:var(--c-text);border-radius:2px;transition:all var(--transition)}
.menu-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ===== Hero ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;background:var(--c-dark);overflow:hidden;padding:100px 0 60px}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(ellipse 80% 60% at 50% 0%,rgba(24,95,165,.15),transparent 70%),
  radial-gradient(ellipse 60% 50% at 80% 80%,rgba(15,110,86,.1),transparent 70%);
  z-index:0}
.hero-grid{content:"";position:absolute;inset:0;background-image:
  linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:60px 60px;mask-image:radial-gradient(ellipse 80% 60% at 50% 30%,black 30%,transparent 70%);z-index:0}
.hero .container{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:100px;font-size:13px;color:rgba(255,255,255,.8);margin-bottom:24px;letter-spacing:.5px}
.hero-tag::before{content:"";width:6px;height:6px;background:var(--c-green-light);border-radius:50%;animation:pulse 2s ease-in-out infinite}
.hero h1{font-size:48px;font-weight:800;color:var(--c-white);line-height:1.2;margin-bottom:20px;letter-spacing:-1px}
.hero h1 .text-gradient{background:linear-gradient(135deg,var(--c-blue-light),var(--c-green-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:17px;color:rgba(255,255,255,.65);max-width:460px;line-height:1.8;margin-bottom:32px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:48px}
.hero-stats{display:flex;gap:40px}
.hero-stat{text-align:center}
.hero-stat-num{display:block;font-size:28px;font-weight:700;color:var(--c-white);font-family:"SF Mono","Fira Code","Consolas",monospace}
.hero-stat-label{font-size:13px;color:rgba(255,255,255,.5);margin-top:4px}
.hero-visual{position:relative;display:flex;align-items:center;justify-content:center}
.hero-visual-box{width:100%;max-width:420px;aspect-ratio:4/3;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-xl);position:relative;overflow:hidden}
.hero-visual-box::before{content:"";position:absolute;inset:0;background:
  linear-gradient(135deg,rgba(24,95,165,.2),transparent 50%),
  linear-gradient(225deg,rgba(15,110,86,.15),transparent 50%)}
.hero-visual-content{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}
.hero-visual-icon{width:64px;height:64px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:28px}
.hero-visual-icon.device{background:var(--c-blue-light)}
.hero-visual-icon.cone{background:var(--c-green-light)}
.hero-visual-grid{display:flex;gap:20px}
.hero-dots{display:flex;gap:8px;margin-top:12px}
.hero-dot{width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,.15)}
.hero-dot.active{background:var(--c-green-light);animation:pulse 2s ease-in-out infinite;animation-delay:calc(var(--i)*.4s)}

/* ===== Product Cards ===== */
.product-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}
.product-card{position:relative;background:var(--c-white);border:1px solid var(--c-border);border-radius:var(--radius-lg);padding:40px 32px;transition:all var(--transition);overflow:hidden}
.product-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--c-blue),var(--c-green));opacity:0;transition:opacity var(--transition)}
.product-card:hover{border-color:var(--c-blue);transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.product-card:hover::before{opacity:1}
.product-icon{width:56px;height:56px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:20px}
.product-icon.blue{background:var(--c-blue-50);color:var(--c-blue)}
.product-icon.green{background:var(--c-green-50);color:var(--c-green)}
.product-card h3{font-size:20px;font-weight:700;margin-bottom:8px}
.product-tag{display:inline-block;padding:3px 10px;border-radius:4px;font-size:11px;font-weight:600;margin-bottom:16px}
.product-tag.blue{background:var(--c-blue-50);color:var(--c-blue)}
.product-tag.green{background:var(--c-green-50);color:var(--c-green)}
.product-card p{color:var(--c-text-2);font-size:14px;line-height:1.7;margin-bottom:16px}
.product-features{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.product-feature{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--c-text-2);padding:4px 12px;background:var(--c-bg);border-radius:100px}
.product-feature::before{content:"";width:4px;height:4px;background:var(--c-blue);border-radius:50%;flex-shrink:0}
.product-card .btn{margin-top:4px}

/* ===== Solution Cards ===== */
.solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.solution-card{background:var(--c-white);border:1px solid var(--c-border);border-radius:var(--radius-lg);padding:36px 28px;transition:all var(--transition);text-align:center}
.solution-card:hover{border-color:var(--c-blue);transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.solution-icon{width:64px;height:64px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:28px;margin:0 auto 20px}
.solution-icon.blue{background:var(--c-blue-50);color:var(--c-blue)}
.solution-icon.green{background:var(--c-green-50);color:var(--c-green)}
.solution-icon.amber{background:var(--c-amber-50);color:var(--c-amber)}
.solution-card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.solution-card p{font-size:14px;color:var(--c-text-2);line-height:1.7;margin-bottom:20px}
.solution-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-blue);transition:gap var(--transition)}
.solution-link:hover{gap:12px}
.solution-link::after{content:"";display:inline-block;width:14px;height:14px;background:currentColor;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M13.172 12l-4.95-4.95 1.414-1.414L16 12l-6.364 6.364-1.414-1.414z'/%3E%3C/svg%3E") center/contain no-repeat}

/* ===== Partnership Banner ===== */
.partnership{background:linear-gradient(135deg,var(--c-green),#085041);position:relative;overflow:hidden;padding:64px 0}
.partnership::before{content:"";position:absolute;inset:0;background:
  radial-gradient(circle at 20% 50%,rgba(255,255,255,.08),transparent 50%),
  radial-gradient(circle at 80% 50%,rgba(255,255,255,.05),transparent 50%)}
.partnership .container{position:relative;z-index:2;text-align:center}
.partner-badge{display:inline-flex;align-items:center;gap:12px;padding:12px 28px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);border-radius:100px;margin-bottom:24px}
.partner-logo{font-size:20px;font-weight:700;color:var(--c-white);letter-spacing:1px}
.partner-divider{width:1px;height:20px;background:rgba(255,255,255,.3)}
.partner-label{font-size:16px;font-weight:600;color:var(--c-white)}
.partnership h2{font-size:28px;font-weight:700;color:var(--c-white);margin-bottom:12px}
.partnership p{font-size:16px;color:rgba(255,255,255,.75);max-width:600px;margin:0 auto 28px;line-height:1.7}
.partnership .btn-outline-light{border-color:rgba(255,255,255,.4)}

/* ===== News Section ===== */
.news-list{display:grid;gap:0}
.news-item{display:flex;align-items:center;gap:24px;padding:20px 24px;border-bottom:1px solid var(--c-border);transition:all var(--transition);border-radius:var(--radius)}
.news-item:hover{background:var(--c-bg)}
.news-date{flex-shrink:0;text-align:center;min-width:60px}
.news-day{display:block;font-size:26px;font-weight:700;color:var(--c-blue);line-height:1}
.news-month{display:block;font-size:12px;color:var(--c-text-2);margin-top:4px}
.news-info{flex:1;min-width:0}
.news-title{font-size:15px;font-weight:600;color:var(--c-text);margin-bottom:4px}
.news-excerpt{font-size:13px;color:var(--c-text-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.news-arrow{flex-shrink:0;width:32px;height:32px;border-radius:50%;border:1px solid var(--c-border);display:flex;align-items:center;justify-content:center;color:var(--c-text-3);transition:all var(--transition)}
.news-item:hover .news-arrow{background:var(--c-blue);border-color:var(--c-blue);color:var(--c-white)}
.news-more{text-align:center;margin-top:32px}

/* ===== Contact Form ===== */
.contact-form{max-width:640px;margin:0 auto}
.form-group{margin-bottom:20px}
.form-label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:var(--c-text)}
.form-input,.form-textarea{width:100%;padding:12px 16px;border:1.5px solid var(--c-border);border-radius:var(--radius);font-size:15px;color:var(--c-text);background:var(--c-white);transition:all var(--transition);outline:none}
.form-input:focus,.form-textarea:focus{border-color:var(--c-blue);box-shadow:0 0 0 3px var(--c-blue-50)}
.form-input::placeholder,.form-textarea::placeholder{color:var(--c-text-3)}
.form-textarea{min-height:140px;resize:vertical}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form-consent{display:flex;align-items:flex-start;gap:10px;font-size:13px;font-weight:400;color:var(--c-text-2);line-height:1.6;cursor:pointer}
.form-consent input[type="checkbox"]{width:16px;height:16px;margin-top:3px;flex-shrink:0;cursor:pointer;accent-color:var(--c-blue)}
.form-consent a{color:var(--c-blue);text-decoration:underline}

/* ===== About Page ===== */
.about-hero{background:linear-gradient(135deg,var(--c-dark),var(--c-dark-3));color:var(--c-white);padding:120px 0 80px;text-align:center}
.about-hero h1{font-size:42px;font-weight:800;margin-bottom:16px}
.about-hero p{font-size:17px;color:rgba(255,255,255,.65);max-width:600px;margin:0 auto}
.about-intro{max-width:800px;margin:0 auto;font-size:16px;line-height:1.9;color:var(--c-text-2)}
.timeline{position:relative;padding-left:32px}
.timeline::before{content:"";position:absolute;left:8px;top:0;bottom:0;width:2px;background:var(--c-border-2)}
.timeline-item{position:relative;margin-bottom:32px}
.timeline-item::before{content:"";position:absolute;left:-28px;top:6px;width:14px;height:14px;background:var(--c-blue);border:3px solid var(--c-white);border-radius:50%;box-shadow:0 0 0 3px var(--c-blue-50)}
.timeline-year{font-size:14px;font-weight:700;color:var(--c-blue);margin-bottom:4px}
.timeline-title{font-size:16px;font-weight:600;margin-bottom:4px}
.timeline-desc{font-size:14px;color:var(--c-text-2)}
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cert-card{text-align:center;padding:32px 20px;background:var(--c-white);border:1px solid var(--c-border);border-radius:var(--radius-lg);transition:all var(--transition)}
.cert-card:hover{border-color:var(--c-blue);box-shadow:var(--shadow)}
.cert-icon{width:56px;height:56px;border-radius:var(--radius);background:var(--c-blue-50);color:var(--c-blue);display:flex;align-items:center;justify-content:center;font-size:24px;margin:0 auto 16px}
.cert-card h4{font-size:15px;font-weight:600;margin-bottom:4px}
.cert-card p{font-size:13px;color:var(--c-text-2)}

/* ===== Page Hero (subpages) ===== */
.page-hero{background:linear-gradient(135deg,var(--c-dark),var(--c-dark-3));color:var(--c-white);padding:120px 0 60px;text-align:center}
.page-hero h1{font-size:42px;font-weight:800;margin-bottom:12px}
.page-hero p{font-size:17px;color:rgba(255,255,255,.65);max-width:600px;margin:0 auto}
.breadcrumb{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:16px;font-size:13px;color:rgba(255,255,255,.5)}
.breadcrumb a{color:rgba(255,255,255,.7);transition:color var(--transition)}
.breadcrumb a:hover{color:var(--c-white)}

/* ===== Products Detail Page ===== */
.product-detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
.product-detail-grid > *{min-width:0}
.product-gallery{position:sticky;top:100px}
.product-gallery-box{
  aspect-ratio:4/3;
  background:transparent;
  border-radius:var(--radius-lg);
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
  width:100%;
  padding:0;
  min-height:320px;
}
.product-info h2{font-size:32px;font-weight:800;margin-bottom:8px}
.product-model{display:inline-block;font-family:"SF Mono","Fira Code","Consolas",monospace;font-size:14px;color:var(--c-blue);background:var(--c-blue-50);padding:4px 12px;border-radius:4px;margin-bottom:16px}
.product-desc{font-size:16px;color:var(--c-text-2);line-height:1.8;margin-bottom:24px}
.spec-table{width:100%;border-collapse:collapse}
.spec-table th,.spec-table td{padding:12px 16px;border-bottom:1px solid var(--c-border);font-size:14px}
.spec-table th{text-align:left;font-weight:600;color:var(--c-text);background:var(--c-bg);width:140px}
.spec-table td{color:var(--c-text-2)}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:none}

/* ===== News Detail ===== */
.news-detail{max-width:800px;margin:0 auto}
.news-detail-header{text-align:center;margin-bottom:40px}
.news-detail-date{font-size:14px;color:var(--c-text-2);margin-top:12px}
.news-detail-body{font-size:16px;line-height:2;color:var(--c-text-2)}
.news-detail-body p{margin-bottom:16px}

/* ===== Footer ===== */
.site-footer{background:var(--c-dark);color:rgba(255,255,255,.7);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:48px;padding-bottom:40px}
.footer-logo{font-size:22px;font-weight:700;color:var(--c-white);margin-bottom:12px}
.footer-desc{font-size:14px;line-height:1.8;margin-bottom:16px}
.footer-col h4{font-size:15px;font-weight:600;color:var(--c-white);margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;color:rgba(255,255,255,.55);transition:color var(--transition)}
.footer-col ul li a:hover{color:var(--c-white)}
.footer-contact p{font-size:14px;line-height:2;color:rgba(255,255,255,.55)}
.social-links{display:flex;gap:12px;margin-top:16px}
.social-link{width:36px;height:36px;border-radius:50%;border:1px solid rgba(255,255,255,.15);display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.5);font-size:16px;transition:all var(--transition)}
.social-link:hover{border-color:var(--c-blue);color:var(--c-white);background:var(--c-blue)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.35)}
.footer-bottom a{color:rgba(255,255,255,.5);transition:color var(--transition)}
.footer-bottom a:hover{color:var(--c-white)}

/* ===== Back to Top ===== */
.back-to-top{position:fixed;bottom:32px;right:32px;width:44px;height:44px;border-radius:50%;background:var(--c-blue);color:var(--c-white);display:flex;align-items:center;justify-content:center;font-size:20px;box-shadow:0 4px 16px rgba(24,95,165,.4);opacity:0;visibility:hidden;transform:translateY(12px);transition:all var(--transition);z-index:999}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--c-blue-dark);transform:translateY(-2px)}

/* ===== Utility ===== */
.bg-light{background:var(--c-bg)}
.bg-white{background:var(--c-white)}
.text-center{text-align:center}

/* ===== Animations ===== */
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.fade-in{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .hero .container{grid-template-columns:1fr;text-align:center}
  .hero-stats{justify-content:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .hero-actions{justify-content:center}
  .hero-visual-box{max-width:320px;margin:0 auto}
  .product-grid{grid-template-columns:1fr;max-width:560px;margin:0 auto}
  .solution-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .product-detail-grid{grid-template-columns:1fr}
  .product-gallery{position:static}
}
@media (max-width:768px){
  .container{padding:0 20px;overflow-x:hidden}
  .section{padding:56px 0}
  .section-title{font-size:26px}
  .main-nav{position:fixed;top:0;right:-100%;width:280px;height:100vh;background:var(--c-white);flex-direction:column;padding:80px 24px 24px;gap:4px;transition:right var(--transition);box-shadow:-4px 0 20px rgba(0,0,0,.1)}
  .main-nav.open{right:0}
  .nav-link{padding:12px 16px;font-size:16px;width:100%}
  .menu-toggle{display:flex}
  .mobile-cta{display:inline-flex;margin-top:16px;width:100%;justify-content:center}
  .lang-switch{margin:4px 0;width:100%;border-radius:var(--radius-sm);height:40px;font-size:14px}
  .desktop-cta{display:none}
  .hero{padding:120px 0 60px;min-height:auto}
  .hero h1{font-size:32px}
  .hero-desc{font-size:15px}
  .hero-stats{gap:24px}
  .hero-stat-num{font-size:22px}
  .solution-grid{grid-template-columns:1fr;max-width:400px;margin:0 auto}
  .page-hero h1,.about-hero h1{font-size:30px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .form-row{grid-template-columns:1fr}
  .cert-grid{grid-template-columns:1fr;max-width:400px;margin:0 auto}
  .back-to-top{bottom:20px;right:20px}
}
@media (max-width:480px){
  .hero h1{font-size:26px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{justify-content:center}
  .news-item{flex-direction:column;align-items:flex-start;gap:12px}
}

/* 产品图片统一自适应规则 */
.pro-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: contain;
}

/* 产品&解决方案图标 圆角裁切（透明无底色，仅CSS生效） */
.product-icon-img,
.solution-icon-img {
  border-radius: var(--radius);
  overflow: hidden;
}
.solution-icon-img {
  margin: 0 auto;
}