/* =============================================================
 *  style.css — 正方行官网全站样式（PC + 移动端）
 * ============================================================= */
:root {
  --primary: #0066CC; --accent: #00AAFF; --dark: #0A0E1A;
  --gradient-primary: linear-gradient(135deg, #0066CC, #00AAFF);
  --transition: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;color:#333;background:#fff;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none}
img{max-width:100%;height:auto}
.container{max-width:1280px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}

/* ========== HEADER ========== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;padding:0;transition:all var(--transition)}
.site-header.scrolled{background:rgba(10,14,26,0.95);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,255,255,0.08);box-shadow:0 4px 24px rgba(0,0,0,0.3)}
.header-inner{max-width:1280px;margin:0 auto;padding:0 24px;height:72px;display:flex;align-items:center;justify-content:space-between}
.header-inner .logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:600;font-size:1rem;text-decoration:none}
.header-inner .logo .logo-icon{flex-shrink:0}
.main-nav{display:flex;align-items:center;gap:4px}
.main-nav a{display:flex;align-items:center;gap:4px;padding:8px 14px;color:rgba(255,255,255,0.85);font-size:.875rem;font-weight:400;border-radius:8px;transition:.3s;text-decoration:none;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(255,255,255,0.1)}
.header-actions{display:flex;align-items:center;gap:12px}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.menu-toggle span{display:block;width:22px;height:2px;background:#fff;border-radius:1px;transition:.3s}

.btn-sm{padding:8px 18px;font-size:.85rem;border-radius:8px;cursor:pointer;border:none;font-family:inherit}
.btn-primary{background:var(--gradient-primary);color:#fff}
.btn{display:inline-block;padding:12px 28px;border-radius:8px;font-size:.9rem;font-weight:500;transition:var(--transition);text-decoration:none;cursor:pointer;font-family:inherit}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(0,102,204,0.3)}
.btn-outline-light{color:#fff;border:1.5px solid rgba(255,255,255,0.3);padding:12px 28px;border-radius:8px;font-size:.9rem;transition:var(--transition);display:inline-block}
.btn-outline-light:hover{background:rgba(255,255,255,0.1);border-color:#fff}
.btn-primary-lg{display:block;margin:0 auto;padding:14px 48px;background:var(--gradient-primary);color:#fff;border:none;border-radius:8px;font-size:1rem;cursor:pointer;font-family:inherit}

/* ========== PAGE BANNER ========== */
.page-banner{background:var(--dark);padding:140px 0 80px;position:relative;overflow:hidden;text-align:center}
.page-banner::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 50% 80% at 50% 100%,rgba(0,102,204,0.12) 0%,transparent 60%)}
.page-banner .container{position:relative;z-index:1}
.page-banner h1{color:#fff;margin-bottom:12px;font-size:clamp(1.8rem,4vw,3rem)}
.page-banner p{color:rgba(255,255,255,0.5);font-size:1rem}

/* ========== HERO ========== */
.hero{min-height:100vh;background:var(--dark);position:relative;display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse 60% 60% at 70% 50%,rgba(0,102,204,0.15) 0%,transparent 60%),radial-gradient(ellipse 40% 40% at 20% 80%,rgba(0,170,255,0.08) 0%,transparent 50%),var(--dark)}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(0,102,204,0.04) 1px,transparent 1px),linear-gradient(90deg,rgba(0,102,204,0.04) 1px,transparent 1px);background-size:60px 60px}
.hero-particles{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.hero-content{position:relative;z-index:1;max-width:1280px;margin:0 auto;padding:0 24px;padding-top:80px;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;background:rgba(0,102,204,0.1);border:1px solid rgba(0,102,204,0.3);border-radius:100px;font-size:.75rem;color:var(--accent);margin-bottom:24px}
.hero-title{color:#fff;font-size:clamp(2.2rem,5vw,3.8rem);margin-bottom:20px;line-height:1.2}
.hero-desc{color:rgba(255,255,255,0.6);font-size:1.05rem;margin-bottom:32px;max-width:600px;margin-left:auto;margin-right:auto}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:48px}
.hero-stats{display:flex;gap:40px;padding-top:32px;border-top:1px solid rgba(255,255,255,0.08);justify-content:center}
.stat-num{font-size:2rem;font-weight:700;color:#fff;display:block}
.stat-label{font-size:.8rem;color:rgba(255,255,255,0.45)}

/* ========== FEATURES ========== */
.feature-banner{background:#f7f9fc;padding:48px 0}
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-item{text-align:center;padding:32px 16px}
.feature-icon{font-size:2.5rem;margin-bottom:12px}
.feature-item h3{font-size:1rem;margin-bottom:4px}
.feature-item p{font-size:.85rem;color:#718096}

/* ========== SECTION TITLES ========== */
.section-title{text-align:center;margin-bottom:12px;font-size:clamp(1.6rem,3vw,2.2rem)}
.section-subtitle{text-align:center;color:#718096;margin-bottom:48px;max-width:560px;margin-left:auto;margin-right:auto}
.section-dark{background:#0F1629;color:#fff}
.section-dark .section-title{color:#fff}
.section-dark .section-subtitle{color:rgba(255,255,255,0.5)}

/* ========== TABS ========== */
.tabs{display:flex;gap:8px;margin-bottom:40px;flex-wrap:wrap;justify-content:center}
.tab-btn{padding:10px 24px;border-radius:100px;border:1.5px solid rgba(0,102,204,0.15);background:#fff;color:#718096;font-size:.875rem;cursor:pointer;transition:.3s;font-family:inherit;font-weight:500;text-decoration:none;display:inline-block}
.tab-btn:hover{border-color:var(--primary);color:var(--primary)}
.tab-btn.active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 8px 32px rgba(0,102,204,0.3)}
.tab-panel{display:none}
.tab-panel.active{display:block}

/* ========== PRODUCTS ========== */
.products-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.product-card{background:#fff;border-radius:16px;overflow:hidden;border:1px solid rgba(0,0,0,0.06);transition:var(--transition)}
.product-card:hover{transform:translateY(-6px);box-shadow:0 24px 64px rgba(0,0,0,0.16)}
.product-img{aspect-ratio:4/3;overflow:hidden;display:flex;align-items:center;justify-content:center;background:#f7f9fc}
.product-img img{width:100%;height:100%;object-fit:cover}
.product-info{padding:20px}
.product-info h3{font-size:1rem;font-weight:600;margin-bottom:6px}
.product-info p{font-size:.825rem;color:#718096;margin-bottom:12px}
.spec-list{list-style:none;padding:0}
.spec-list li{font-size:.75rem;color:#4A5568;padding:3px 0}
.spec-list li::before{content:'';display:inline-block;width:6px;height:6px;background:var(--primary);border-radius:50%;margin-right:6px;vertical-align:middle}

/* ========== PRODUCTS PAGE LAYOUT ========== */
.products-layout{display:flex;gap:32px}
.products-sidebar{width:220px;flex-shrink:0;background:#fff;border-radius:16px;border:1px solid rgba(0,0,0,0.06);padding:24px;position:sticky;top:100px;height:fit-content}
.products-sidebar h3{font-size:1rem;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid rgba(0,0,0,0.06)}
.products-sidebar nav{display:flex;flex-direction:column;gap:4px}
.products-sidebar nav a{display:block;padding:10px 16px;border-radius:8px;font-size:.875rem;color:#4A5568;text-decoration:none;transition:.2s}
.products-sidebar nav a:hover{background:rgba(0,102,204,0.06);color:var(--primary)}
.products-sidebar nav a.active{background:var(--primary);color:#fff}
.products-content{flex:1;min-width:0}
.product-detail-card{display:flex;gap:32px;background:#fff;border-radius:16px;border:1px solid rgba(0,0,0,0.06);padding:24px;margin-bottom:20px;transition:.3s}
.product-detail-card:hover{box-shadow:0 8px 32px rgba(0,0,0,0.1)}
.product-detail-img{width:320px;flex-shrink:0;border-radius:12px;aspect-ratio:4/3;overflow:hidden;display:flex;align-items:center;justify-content:center;background:#f7f9fc}
.product-detail-img img{width:100%;height:100%;object-fit:cover}
.product-detail-info{flex:1}
.product-detail-info h3{font-size:1.2rem;margin-bottom:8px}
.product-detail-info>p{color:#718096;margin-bottom:16px}
.spec-table{width:100%;border-collapse:collapse;margin-bottom:16px}
.spec-table tr{border-bottom:1px solid rgba(0,0,0,0.05)}
.spec-table th{text-align:left;width:100px;padding:8px 0;font-size:.8rem;color:var(--primary)}
.spec-table td{padding:8px 0;font-size:.85rem}
.feature-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tag{display:inline-block;padding:4px 12px;background:rgba(0,102,204,0.06);color:var(--primary);font-size:.75rem;border-radius:100px;border:1px solid rgba(0,102,204,0.12)}
.breadcrumb{margin-bottom:24px;font-size:.825rem;color:#718096}

/* ========== CUSTOM FORM ========== */
.custom-form-wrapper{background:#fff;border-radius:16px;padding:40px;border:1px solid rgba(0,0,0,0.06)}
.custom-form-wrapper h2{text-align:center;margin-bottom:8px}
.form-intro{text-align:center;color:#718096;margin-bottom:32px}
.custom-form fieldset,.contact-form-card fieldset{border:1.5px solid rgba(0,0,0,0.2);border-radius:12px;padding:24px;margin-bottom:24px;background:#fafbfc}
legend{font-weight:600;font-size:.95rem;padding:0 12px;color:var(--primary)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:.825rem;font-weight:500;margin-bottom:6px}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:10px 14px;border:1.5px solid rgba(0,0,0,0.25);border-radius:8px;font-size:.875rem;font-family:inherit;outline:none;transition:.2s;background:#fff}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,102,204,0.08)}
.form-group textarea{resize:vertical;min-height:100px}

/* ========== CASES ========== */
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{background:#fff;border:1px solid rgba(0,0,0,0.06);border-radius:16px;overflow:hidden;transition:.3s}
.case-card:hover{transform:translateY(-6px);box-shadow:0 8px 32px rgba(0,0,0,0.1)}
.case-img{aspect-ratio:16/9;overflow:hidden;display:flex;align-items:center;justify-content:center;background:#f7f9fc}
.case-img img{width:100%;height:100%;object-fit:cover}
.case-info{padding:20px}
.case-info h3{font-size:.95rem;margin-bottom:8px}
.case-info p{font-size:.825rem;color:#718096}
.case-tag{display:inline-block;padding:3px 12px;background:rgba(0,102,204,0.08);color:var(--primary);font-size:.7rem;border-radius:100px;margin-bottom:8px}
.cases-detailed{display:flex;flex-direction:column;gap:24px}
.case-detail-card{display:flex;gap:32px;background:#fff;border-radius:16px;border:1px solid rgba(0,0,0,0.06);overflow:hidden;transition:.3s}
.case-detail-card:hover{box-shadow:0 8px 32px rgba(0,0,0,0.1)}
.case-detail-img{width:300px;flex-shrink:0;min-height:200px;display:flex;align-items:center;justify-content:center;background:#f7f9fc}
.case-detail-img img{width:100%;height:100%;object-fit:cover}
.case-detail-body{padding:24px;flex:1}
.case-summary{color:#718096;margin-bottom:12px}
.case-full-content{color:#4A5568;font-size:.875rem;margin-bottom:16px;line-height:1.8}
.case-stats-row{display:flex;gap:24px;flex-wrap:wrap}
.case-stat-item{text-align:center;padding:12px 20px;background:#f7f9fc;border-radius:8px}
.case-stat-item strong{display:block;font-size:1.2rem;color:var(--primary)}
.case-stat-item span{font-size:.75rem;color:#718096}

/* ========== ABOUT ========== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.about-highlights-full{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}
.highlight-card{background:#f7f9fc;border-radius:12px;padding:20px;text-align:center}
.highlight-card h4{margin-bottom:6px;color:var(--primary)}
.highlight-card p{font-size:.85rem}
.about-preview{text-align:center}
.about-preview .about-highlights{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin:32px 0}
.about-preview .about-highlights div{background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);border-radius:12px;padding:24px}
.about-preview .about-highlights strong{display:block;font-size:.85rem;color:#7ec8f0;margin-bottom:6px}
.about-preview .about-highlights p{color:rgba(255,255,255,0.75)!important}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-bignum{display:block;font-size:2.5rem;font-weight:700;color:#fff;margin-bottom:4px}
.stat-bignum+span{color:rgba(255,255,255,0.5);font-size:.85rem}
.timeline{position:relative;padding-left:32px}
.timeline::before{content:'';position:absolute;left:0;top:8px;bottom:0;width:2px;background:linear-gradient(180deg,var(--primary) 0%,transparent 100%)}
.timeline-item{position:relative;padding-bottom:32px}
.timeline-item::before{content:'';position:absolute;left:-38px;top:4px;width:12px;height:12px;background:var(--primary);border:2px solid #fff;border-radius:50%;box-shadow:0 0 0 3px rgba(0,102,204,0.2)}
.timeline-content{padding:0 16px}
.timeline-content h3{font-size:1rem;color:var(--primary);margin-bottom:4px}
.timeline-content p{font-size:.875rem;color:#718096}
.advantages-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.advantage-card{text-align:center;padding:32px 20px;background:rgba(255,255,255,0.05);border-radius:16px;border:1px solid rgba(255,255,255,0.06);transition:.3s}
.advantage-card:hover{transform:translateY(-4px);border-color:rgba(0,102,204,0.3)}
.advantage-icon{font-size:2.5rem;margin-bottom:16px}
.advantage-card h3{color:#fff;margin-bottom:8px;font-size:1rem}
.advantage-card p{color:rgba(255,255,255,0.45);font-size:.85rem}

/* ========== AFTERSALE ========== */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.service-card{background:#fff;border-radius:16px;padding:32px;border:1px solid rgba(0,0,0,0.06);transition:.3s;text-align:center}
.service-card:hover{transform:translateY(-4px);box-shadow:0 8px 32px rgba(0,0,0,0.1)}
.service-icon{font-size:2.5rem;margin-bottom:16px}
.service-card h3{font-size:1.05rem;margin-bottom:8px}
.service-card p{font-size:.85rem;color:#718096}
.process-steps{display:flex;gap:0;position:relative}
.process-steps::before{content:'';position:absolute;top:28px;left:14%;right:14%;height:2px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.process-step{flex:1;text-align:center;padding:0 16px;position:relative;z-index:1}
.step-num{width:56px;height:56px;background:var(--gradient-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:700;color:#fff;margin:0 auto 16px}
.process-step h4{font-size:.9rem;margin-bottom:4px;color:#fff}
.process-step p{font-size:.78rem;color:rgba(255,255,255,0.5)}
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{border:1px solid rgba(0,0,0,0.06);border-radius:12px;overflow:hidden}
.faq-question{width:100%;padding:20px 24px;text-align:left;background:#fff;border:none;font-size:.9rem;font-weight:500;color:#333;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-family:inherit;transition:background .2s}
.faq-question:hover{background:#f7f9fc}
.faq-arrow{transition:transform .2s;color:var(--primary)}
.faq-item.open .faq-arrow{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s;background:#fff}
.faq-item.open .faq-answer{max-height:300px}
.faq-answer p{padding:0 24px 20px;font-size:.85rem;color:#718096;line-height:1.8}

/* ========== CONTACT ========== */
.contact-layout{display:grid;grid-template-columns:1fr 1.5fr;gap:48px}
.contact-info-card{background:#f7f9fc;border-radius:16px;padding:32px}
.contact-info-item{display:flex;gap:16px;align-items:flex-start;padding:16px 0;border-bottom:1px solid rgba(0,0,0,0.05)}
.contact-info-item:first-child{padding-top:0}
.contact-icon{font-size:1.5rem;flex-shrink:0}
.contact-info-item strong{font-size:.8rem;color:#718096;display:block;margin-bottom:2px}
.contact-info-item p{font-size:.9rem;font-weight:500}
.contact-socials{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}
.contact-socials span{padding:6px 16px;background:#fff;border-radius:100px;font-size:.8rem;border:1px solid rgba(0,0,0,0.08)}
.contact-form-card{background:#fff;border-radius:16px;padding:32px;border:1px solid rgba(0,0,0,0.06)}
.contact-form-card h2{margin-bottom:24px;font-size:1.2rem}

/* ========== CTA ========== */
.cta-section{text-align:center;padding:80px 0;background:linear-gradient(135deg,var(--dark),#1A2240)}
.cta-section h2{color:#fff;margin-bottom:12px}
.cta-section p{color:rgba(255,255,255,0.5);margin-bottom:32px}

/* ========== FOOTER ========== */
.site-footer{background:var(--dark);border-top:1px solid rgba(255,255,255,0.05);padding:64px 0 32px}
.footer-main{max-width:1280px;margin:0 auto 48px;padding:0 24px;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px}
.footer-about{}
.footer-logo{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-logo span{color:#fff;font-weight:600;font-size:1rem}
.footer-about p{font-size:.825rem;color:rgba(255,255,255,0.4)}
.footer-col h4{font-size:.875rem;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col ul li{font-size:.825rem;color:rgba(255,255,255,0.45)}
.footer-col a{font-size:.825rem;color:rgba(255,255,255,0.45);text-decoration:none;transition:.2s}
.footer-col a:hover{color:var(--accent)}
.footer-social-icons{display:flex;flex-wrap:wrap;gap:8px}
.footer-social-icons .social-item{padding:6px 14px;background:rgba(255,255,255,0.05);border-radius:100px;font-size:.75rem;color:rgba(255,255,255,0.45);border:1px solid rgba(255,255,255,0.08)}
.footer-bottom{max-width:1280px;margin:0 auto;padding:32px 24px 0;border-top:1px solid rgba(255,255,255,0.05);display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
.footer-bottom p,.footer-bottom a{font-size:.8rem;color:rgba(255,255,255,0.3);text-decoration:none}
.footer-bottom a:hover{color:var(--accent)}

/* ========== FLOAT SIDEBAR ========== */
.float-sidebar{position:fixed;right:24px;bottom:100px;z-index:900;display:flex;flex-direction:column;gap:10px}
.float-btn{width:48px;height:48px;background:rgba(10,14,26,0.9);border:1px solid rgba(255,255,255,0.1);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:.3s;position:relative;color:rgba(255,255,255,0.7)}
.float-btn:hover{background:var(--primary);border-color:var(--primary);color:#fff;transform:scale(1.1);box-shadow:0 8px 32px rgba(0,102,204,0.3)}
.float-backtop{background:var(--primary);border-color:var(--primary);color:#fff;opacity:0;pointer-events:none;transition:.3s}
.float-backtop.visible{opacity:1;pointer-events:auto}
.qr-popup{position:absolute;right:60px;top:50%;transform:translateY(-50%) translateX(8px);background:rgba(15,22,41,0.98);border:1px solid rgba(255,255,255,0.1);border-radius:12px;padding:12px 16px;text-align:center;min-width:120px;opacity:0;visibility:hidden;transition:all .25s cubic-bezier(0.16,1,0.3,1);backdrop-filter:blur(20px);pointer-events:none;font-size:.8rem;color:rgba(255,255,255,0.7)}
.float-btn:hover .qr-popup{opacity:1;visibility:visible;transform:translateY(-50%) translateX(0);pointer-events:auto}
.qr-placeholder{display:flex}

/* ========== ANIMATION ========== */
.fade-up{opacity:0;transform:translateY(30px);transition:opacity .6s cubic-bezier(0.16,1,0.3,1),transform .6s cubic-bezier(0.16,1,0.3,1)}
.fade-up.visible{opacity:1;transform:translateY(0)}
@keyframes floatUp{0%{transform:translateY(100vh);opacity:0}10%{opacity:1}90%{opacity:1}100%{transform:translateY(-100vh);opacity:0}}

/* ========== RESPONSIVE ========== */
@media (max-width:1024px){
  .hero-stats{flex-wrap:wrap;gap:24px}
  .about-grid{grid-template-columns:1fr;gap:48px}
  .contact-layout{grid-template-columns:1fr;gap:32px}
  .footer-main{grid-template-columns:1fr 1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center}
  .products-layout{flex-direction:column}
  .products-sidebar{width:100%;position:static}
  .products-sidebar nav{flex-direction:row;flex-wrap:wrap;gap:8px}
  .products-sidebar nav a{display:inline-block}
  .advantages-grid{grid-template-columns:repeat(2,1fr)}
  .case-detail-card,.product-detail-card{flex-direction:column}
  .case-detail-img,.product-detail-img{width:100%}
  .features-grid{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:768px){
  .section{padding:48px 0}
  .container{padding:0 16px}
  .main-nav{display:none;position:fixed;top:72px;left:0;right:0;background:rgba(10,14,26,0.98);backdrop-filter:blur(20px);flex-direction:column;padding:16px;border-bottom:1px solid rgba(255,255,255,0.06);z-index:999}
  .main-nav.open{display:flex}
  .menu-toggle{display:flex}
  .header-inner{padding:0 16px;height:64px}
  .hero{min-height:90vh}
  .hero-content{padding:0 16px;padding-top:80px}
  .hero-title{font-size:clamp(1.6rem,7vw,2.5rem)}
  .hero-desc{font-size:.9rem}
  .hero-stats{flex-wrap:wrap;gap:20px;justify-content:center}
  .stat-num{font-size:1.4rem}
  .page-banner{padding:100px 0 48px}
  .page-banner h1{font-size:1.6rem}
  .products-grid,.cases-grid,.services-grid,.features-grid,.advantages-grid,.about-highlights-full,.about-preview .about-highlights,.stats-grid{grid-template-columns:1fr;gap:16px}
  .product-detail-card{padding:16px}.product-detail-img{aspect-ratio:16/9}
  .tabs{gap:6px}.tab-btn{padding:8px 16px;font-size:.8rem}
  .custom-form-wrapper,.contact-info-card,.contact-form-card{padding:20px}
  .custom-form fieldset,.contact-form-card fieldset{padding:16px}
  .form-row{grid-template-columns:1fr}
  .case-detail-body{padding:16px}.case-stats-row{gap:12px}
  .process-steps{flex-wrap:wrap;gap:20px}.process-steps::before{display:none}.process-step{flex:0 0 100%}
  .timeline{padding-left:24px}.timeline-item::before{left:-30px;width:10px;height:10px}
  .footer-main{grid-template-columns:1fr;gap:24px}.footer-bottom{flex-direction:column;text-align:center;gap:8px}
  .float-sidebar{right:12px;bottom:80px}.float-btn{width:42px;height:42px}
  .faq-question{padding:16px 20px;font-size:.85rem}
  .hero-btns{gap:12px}
  .hero-btns .btn{width:100%;text-align:center}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .stat-bignum{font-size:1.8rem}
  .products-sidebar{padding:16px}.products-sidebar nav a{font-size:.8rem;padding:8px 14px}
  .breadcrumb{font-size:.78rem;margin-bottom:16px}
  .cta-section{padding:48px 16px}
  .feature-banner{padding:32px 0}.feature-item{padding:20px 12px}.feature-icon{font-size:2rem}
}

@media (max-width:480px){
  .header-inner .logo span{font-size:.85rem}
  .hero-title{font-size:clamp(1.4rem,8vw,2rem)}
  .hero-stats{justify-content:space-around;gap:16px}
  .stat-num{font-size:1.2rem}
  .page-banner h1{font-size:1.4rem}.page-banner p{font-size:.85rem}
  .section-title{font-size:1.3rem}.section-subtitle{font-size:.85rem;margin-bottom:32px}
  .float-sidebar{right:8px;bottom:60px}.float-btn{width:38px;height:38px}.float-btn svg{width:16px;height:16px}
  .qr-popup{right:50px;font-size:.7rem;min-width:100px}
  .stats-grid{grid-template-columns:1fr 1fr;gap:12px}
  .stat-bignum{font-size:1.5rem}
  .highlight-card{padding:16px}.highlight-card h4{font-size:.9rem}.highlight-card p{font-size:.8rem}
  .form-group input,.form-group select,.form-group textarea{font-size:.85rem;padding:8px 12px}
  .product-info,.case-info,.case-detail-body{padding:14px}
  .footer-main{gap:20px}.footer-col h4{font-size:.8rem}
}