:root{--primary:#1677ff;--primary-dark:#0958d9;--primary-light:#4096ff;--gradient:linear-gradient(135deg,#1677ff 0%,#0050b3 100%);--gradient-hero:linear-gradient(135deg,#001d6e 0%,#003eb2 40%,#1677ff 100%);--text-primary:#1a1a2e;--text-secondary:#4a5568;--text-light:#718096;--bg-light:#f8faff;--bg-card:#ffffff;--border:#e2e8f0;--shadow:0 4px 24px rgba(22,119,255,0.10);--shadow-hover:0 16px 48px rgba(22,119,255,0.22);--radius:16px;--radius-lg:24px;--transition:all 0.3s cubic-bezier(0.4,0,0.2,1);}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}html{scroll-behavior:smooth;font-size:18px;}body{overflow-x:hidden;font-family:'PingFang SC','Microsoft YaHei',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color:var(--text-primary);background:#fff;line-height:1.75;}a{text-decoration:none;color:inherit;}ul{list-style:none;}img{max-width:100%;display:block;height:auto;}button{cursor:pointer;border:none;background:none;font-family:inherit;}.container{max-width:1280px;margin:0 auto;padding:0 32px;}.section{padding:120px 0;}.section-header{text-align:center;margin-bottom:72px;}.section-tag{display:inline-block;background:rgba(22,119,255,0.1);color:var(--primary);padding:8px 22px;border-radius:30px;font-size:14px;font-weight:700;margin-bottom:20px;letter-spacing:2px;}.section-title{font-size:2.8rem;font-weight:800;color:var(--text-primary);margin-bottom:20px;line-height:1.25;letter-spacing:-0.5px;}.section-desc{font-size:1.15rem;color:var(--text-secondary);max-width:640px;margin:0 auto;line-height:1.8;}.gradient-text{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--gradient);color:#fff;padding:14px 32px;border-radius:10px;font-size:16px;font-weight:700;transition:var(--transition);box-shadow:0 6px 20px rgba(22,119,255,0.38);letter-spacing:0.5px;}.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(22,119,255,0.48);}.btn-outline{display:inline-flex;align-items:center;gap:8px;background:transparent;color:#fff;padding:14px 32px;border-radius:10px;border:2px solid rgba(255,255,255,0.65);font-size:16px;font-weight:700;transition:var(--transition);}.btn-outline:hover{background:rgba(255,255,255,0.18);border-color:#fff;}.btn-large{padding:18px 44px;font-size:18px;border-radius:12px;}.btn-block{width:100%;justify-content:center;padding:18px;font-size:17px;}.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,0.96);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid var(--border);transition:var(--transition);}.navbar.scrolled{box-shadow:0 2px 24px rgba(0,0,0,0.09);}.nav-container{display:grid;grid-template-columns:auto 1fr auto;align-items:center;height:80px;max-width:1440px;margin:0 auto;padding:0 24px;position:relative;}.nav-logo{display:flex;align-items:center;}.logo-img{height:62px;width:auto;display:block;max-width:260px;object-fit:contain;filter:drop-shadow(0 2px 10px rgba(22,119,255,0.2));}.logo-img-lg{height:88px;width:auto;display:block;max-width:340px;object-fit:contain;filter:drop-shadow(0 2px 12px rgba(22,119,255,0.2));}.footer-logo-img{height:64px;width:auto;filter:brightness(0) invert(1) drop-shadow(0 2px 8px rgba(255,255,255,0.15));}.nav-links{display:flex;align-items:center;justify-content:center;gap:0;flex-wrap:nowrap;white-space:nowrap;}.nav-link{padding:6px 8px;border-radius:8px;font-size:13px;font-weight:600;color:var(--text-secondary);white-space:nowrap;transition:var(--transition);position:relative;}.nav-link:hover,.nav-link.active{color:var(--primary);background:rgba(22,119,255,0.08);}.nav-dropdown{position:relative;}.dropdown-menu{display:none;position:absolute;top:calc(100% + 10px);left:0;background:#fff;border-radius:var(--radius);padding:10px 0;box-shadow:0 10px 40px rgba(0,0,0,0.13);min-width:180px;border:1px solid var(--border);}.dropdown-menu a{display:block;padding:12px 24px;font-size:15px;color:var(--text-secondary);transition:var(--transition);}.dropdown-menu a:hover{color:var(--primary);background:var(--bg-light);}.nav-dropdown:hover .dropdown-menu{display:block;}.arrow{font-size:11px;}.nav-cta{display:flex;align-items:center;gap:8px;flex-shrink:0;}.nav-phone{font-size:12px;color:var(--primary);font-weight:700;white-space:nowrap;}.nav-city-btn{display:inline-flex;align-items:center;gap:4px;font-size:12px;font-weight:600;color:var(--text-secondary);padding:5px 10px;border-radius:24px;border:1.5px solid var(--border);transition:var(--transition);white-space:nowrap;}.nav-city-btn:hover{color:var(--primary);border-color:var(--primary);background:rgba(22,119,255,0.06);}.nav-toggle{display:none;font-size:1.6rem;color:var(--text-primary);}.nav-cta .btn-primary{padding:8px 16px;font-size:13px;box-shadow:0 4px 14px rgba(22,119,255,0.32);}.hero{position:relative;min-height:100vh;display:flex;align-items:center;background:var(--gradient-hero);overflow:hidden;padding-top:80px;}.hero-bg{position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse 80% 60% at 70% 50%,rgba(64,150,255,0.18) 0%,transparent 70%),radial-gradient(ellipse 40% 40% at 20% 80%,rgba(0,80,179,0.32) 0%,transparent 60%);}.hero-particles{position:absolute;top:0;left:0;right:0;bottom:0;overflow:hidden;}.particle{position:absolute;border-radius:50%;background:rgba(255,255,255,0.1);animation:float linear infinite;}@keyframes float{0%{transform:translateY(100vh) scale(0);opacity:0;}10%{opacity:1;}90%{opacity:1;}100%{transform:translateY(-100px) scale(1);opacity:0;}}.hero-content{position:relative;z-index:2;max-width:1280px;margin:0 auto;padding:0 32px;display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;width:100%;}.hero-badge{display:inline-block;background:rgba(255,255,255,0.18);color:#fff;padding:8px 22px;border-radius:30px;font-size:15px;font-weight:600;margin-bottom:28px;border:1px solid rgba(255,255,255,0.3);letter-spacing:1px;}.hero-title{font-size:4rem;font-weight:900;color:#fff;line-height:1.15;margin-bottom:28px;letter-spacing:-1px;}.hero-title .gradient-text{background:linear-gradient(135deg,#7ec8ff,#c4e1ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}.hero-subtitle{font-size:1.2rem;color:rgba(255,255,255,0.82);margin-bottom:44px;line-height:1.9;}.hero-actions{display:flex;gap:20px;flex-wrap:wrap;margin-bottom:60px;}.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}.stat-item{text-align:center;}.stat-number{display:block;font-size:2.4rem;font-weight:900;color:#fff;line-height:1.1;}.stat-number sup{font-size:1.1rem;}.stat-label{font-size:13px;color:rgba(255,255,255,0.65);margin-top:6px;display:block;letter-spacing:0.5px;}.hero-visual{display:flex;justify-content:center;align-items:center;position:relative;z-index:2;}.device-mockup{background:rgba(255,255,255,0.12);border:1px solid rgba(255,255,255,0.25);border-radius:20px;padding:6px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 30px 80px rgba(0,0,0,0.35);width:360px;}.device-screen{background:#fff;border-radius:16px;overflow:hidden;}.screen-header{background:var(--primary);padding:14px 20px;display:flex;align-items:center;gap:10px;}.screen-dot{width:12px;height:12px;border-radius:50%;}.screen-dot.red{background:#ff5f57;}.screen-dot.yellow{background:#febc2e;}.screen-dot.green{background:#28c840;}.screen-title{color:#fff;font-size:15px;font-weight:700;margin-left:8px;}.screen-body{padding:24px;}.screen-row{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid #f0f0f0;font-size:15px;}.item-name{color:var(--text-primary);}.item-price{color:var(--primary);font-weight:700;}.screen-divider{height:1px;background:var(--border);margin:14px 0;}.screen-total{display:flex;justify-content:space-between;padding:10px 0;font-weight:800;font-size:17px;}.total-price{color:#f5222d;font-size:1.4rem;}.screen-pay-btns{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px;}.pay-btn{padding:14px;border-radius:10px;text-align:center;font-size:15px;font-weight:700;cursor:pointer;}.pay-btn.wechat{background:#07c160;color:#fff;}.pay-btn.alipay{background:#1677ff;color:#fff;}.products-section{background:var(--bg-light);}.products-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}.product-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:40px 36px;border:1px solid var(--border);transition:var(--transition);position:relative;overflow:hidden;}.product-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient);opacity:0;transition:var(--transition);}.product-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover);border-color:rgba(22,119,255,0.2);}.product-card:hover::before{opacity:1;}.product-card.featured{background:var(--gradient);color:#fff;border-color:transparent;}.product-card.featured h3,.product-card.featured p,.product-card.featured li{color:rgba(255,255,255,0.92);}.product-card.featured .product-link{color:#fff;border-color:rgba(255,255,255,0.5);}.product-icon{font-size:3.2rem;margin-bottom:20px;line-height:1;}.product-card h3{font-size:1.35rem;font-weight:800;margin-bottom:12px;color:var(--text-primary);}.product-card p{font-size:15px;color:var(--text-secondary);margin-bottom:20px;line-height:1.8;}.product-features{margin-bottom:24px;}.product-features li{font-size:14px;color:var(--text-secondary);padding:6px 0;}.product-link{display:inline-block;font-size:15px;font-weight:700;color:var(--primary);padding:6px 0;border-bottom:2px solid var(--primary);transition:var(--transition);}.solutions-section{background:#fff;}.solutions-tabs{background:var(--bg-light);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);}.tab-nav{display:flex;background:#fff;border-bottom:1px solid var(--border);flex-wrap:wrap;}.tab-btn{flex:1;min-width:130px;padding:20px 14px;font-size:15px;font-weight:600;color:var(--text-secondary);background:transparent;border:none;cursor:pointer;transition:var(--transition);border-bottom:3px solid transparent;}.tab-btn:hover{color:var(--primary);background:var(--bg-light);}.tab-btn.active{color:var(--primary);font-weight:800;border-bottom-color:var(--primary);background:rgba(22,119,255,0.05);}.tab-content{padding:60px;}.tab-pane{display:none;}.tab-pane.active{display:block;}.solution-detail{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}.solution-text h3{font-size:1.75rem;font-weight:800;margin-bottom:20px;}.solution-text p{color:var(--text-secondary);line-height:1.9;margin-bottom:28px;font-size:16px;}.solution-list{margin-bottom:36px;}.solution-list li{padding:10px 0;font-size:15px;color:var(--text-secondary);border-bottom:1px dashed var(--border);}.solution-list li:last-child{border:none;}.solution-visual{display:flex;justify-content:center;align-items:center;}.solution-card-stack{position:relative;width:260px;height:220px;}.sol-card{position:absolute;background:var(--gradient);color:#fff;border-radius:var(--radius);padding:22px 28px;font-size:16px;font-weight:700;text-align:center;box-shadow:var(--shadow);white-space:nowrap;}.sol-card-1{top:0;left:0;z-index:3;}.sol-card-2{top:55px;left:65px;z-index:2;background:linear-gradient(135deg,#0958d9,#003eb2);}.sol-card-3{top:110px;left:130px;z-index:1;background:linear-gradient(135deg,#001d6e,#003eb2);}.hardware-section{background:var(--bg-light);}.hardware-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-bottom:40px;}.hardware-card{background:#fff;border-radius:var(--radius);padding:40px 28px;text-align:center;border:1px solid var(--border);transition:var(--transition);}.hardware-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(22,119,255,0.25);}.hw-icon{font-size:3.2rem;margin-bottom:18px;line-height:1;}.hardware-card h4{font-size:1.15rem;font-weight:800;margin-bottom:10px;}.hardware-card p{font-size:14px;color:var(--text-secondary);line-height:1.7;}.hardware-note{text-align:center;padding:20px 24px;background:rgba(22,119,255,0.05);border-radius:var(--radius);border:1px dashed rgba(22,119,255,0.3);}.hardware-note p{font-size:15px;color:var(--text-secondary);}.text-link{color:var(--primary);font-weight:700;}.text-link:hover{text-decoration:underline;}.highlight-section{background:var(--gradient);padding:80px 0;}.highlight-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px;}.highlight-item{display:flex;align-items:flex-start;gap:20px;}.highlight-icon{font-size:2.8rem;flex-shrink:0;line-height:1;}.highlight-content h3{font-size:1.2rem;font-weight:800;color:#fff;margin-bottom:8px;}.highlight-content p{font-size:14px;color:rgba(255,255,255,0.78);line-height:1.7;}.news-section{background:#fff;}.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;}.news-card{background:var(--bg-light);border-radius:var(--radius);padding:36px;border:1px solid var(--border);transition:var(--transition);}.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(22,119,255,0.2);}.news-card.news-featured{grid-column:1 / -1;background:var(--gradient);}.news-card.news-featured h3,.news-card.news-featured p{color:rgba(255,255,255,0.92);}.news-card.news-featured .news-meta span{color:rgba(255,255,255,0.7);}.news-tag{display:inline-block;background:rgba(22,119,255,0.1);color:var(--primary);padding:4px 12px;border-radius:6px;font-size:12px;font-weight:600;margin-right:8px;}.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px;}.news-meta span{font-size:13px;color:var(--text-light);}.news-card h3{font-size:1.1rem;font-weight:700;color:var(--text-primary);margin-bottom:10px;line-height:1.5;}.news-card p{font-size:14px;color:var(--text-secondary);line-height:1.7;margin-bottom:16px;}.news-link{font-size:14px;font-weight:600;color:var(--primary);}.contact-section{background:var(--gradient);color:#fff;}.contact-section .section-tag{background:rgba(255,255,255,0.15);color:#fff;}.contact-section .section-title{color:#fff;}.contact-section .section-desc{color:rgba(255,255,255,0.85);}.contact-layout{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start;}.contact-text h2{font-size:2rem;font-weight:800;margin-bottom:16px;}.contact-text > p{color:rgba(255,255,255,0.85);line-height:1.8;margin-bottom:28px;font-size:16px;}.contact-info-list{margin-bottom:32px;}.contact-info-item{display:flex;align-items:center;gap:10px;padding:10px 0;font-size:15px;color:rgba(255,255,255,0.85);border-bottom:1px solid rgba(255,255,255,0.1);}.contact-info-item:last-child{border-bottom:none;}.wechat-qr-block{text-align:center;margin-bottom:32px;}.wechat-qr-title{font-size:14px;font-weight:700;color:rgba(255,255,255,0.9);margin-bottom:14px;}.wechat-qr-wrap{display:inline-block;background:#fff;border-radius:12px;padding:10px;}.wechat-qr-img{width:150px;height:150px;display:block;}.wechat-qr-tip{font-size:12px;color:rgba(255,255,255,0.6);margin-top:10px;}.social-follow-block{margin-top:20px;}.sfb-label{font-size:14px;font-weight:700;color:rgba(255,255,255,0.9);margin-bottom:14px;}.sfb-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}.sfb-item{text-align:center;}.sfb-qr-wrap{background:#fff;border-radius:10px;padding:8px;margin:0 auto 8px;width:fit-content;}.sfb-qr-img{width:100px;height:100px;display:block;}.sfb-platform{font-size:12px;color:rgba(255,255,255,0.7);}.sfb-handle{font-size:13px;color:#fff;font-weight:600;}.contact-form-wrap{background:#fff;border-radius:var(--radius-lg);padding:36px;box-shadow:0 20px 60px rgba(0,0,0,0.2);}.contact-form{display:flex;flex-direction:column;gap:18px;}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}.form-group{display:flex;flex-direction:column;gap:6px;}.form-group label{font-size:14px;font-weight:600;color:var(--text-primary);}.form-group input,.form-group select,.form-group textarea{padding:12px 16px;border:1px solid var(--border);border-radius:10px;font-size:15px;color:var(--text-primary);background:var(--bg-light);transition:var(--transition);font-family:inherit;}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(22,119,255,0.12);background:#fff;}.form-group textarea{resize:vertical;min-height:80px;}.form-privacy{font-size:12px;color:var(--text-light);text-align:center;margin-top:4px;}.footer{background:#0a1628;color:rgba(255,255,255,0.75);padding:64px 0 0;}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px;}.footer-brand .footer-slogan{font-size:14px;color:rgba(255,255,255,0.55);line-height:1.7;margin:16px 0 20px;}.footer-social{display:flex;gap:12px;}.social-icon{width:36px;height:36px;border-radius:10px;background:rgba(255,255,255,0.08);display:flex;align-items:center;justify-content:center;font-size:16px;transition:var(--transition);}.social-icon:hover{background:var(--primary);transform:translateY(-2px);}.footer-links h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:20px;}.footer-links ul{list-style:none;padding:0;}.footer-links li{margin-bottom:10px;}.footer-links a{font-size:14px;color:rgba(255,255,255,0.6);transition:var(--transition);}.footer-links a:hover{color:var(--primary);padding-left:4px;}.footer-corp-info{border-top:1px solid rgba(255,255,255,0.1);padding:24px 0;}.fci-row{display:flex;align-items:baseline;gap:8px;padding:6px 0;font-size:14px;}.fci-label{color:rgba(255,255,255,0.4);white-space:nowrap;min-width:80px;}.fci-value{color:rgba(255,255,255,0.7);}.fci-tel{color:#60a5fa;text-decoration:none;font-weight:600;}.fci-tel:hover{color:#fff;}.fci-link{color:#60a5fa;text-decoration:none;}.fci-link:hover{color:#fff;}.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding:20px 0;text-align:center;}.footer-bottom p{font-size:13px;color:rgba(255,255,255,0.45);margin:4px 0;}.footer-bottom a{color:rgba(255,255,255,0.55);text-decoration:none;}.footer-bottom a:hover{color:#fff;}.icp{margin-top:6px;}.back-to-top{position:fixed;bottom:32px;right:32px;z-index:999;width:48px;height:48px;border-radius:14px;background:var(--gradient);color:#fff;font-size:20px;box-shadow:0 8px 24px rgba(22,119,255,0.35);transition:var(--transition);opacity:0;visibility:hidden;}.back-to-top.visible{opacity:1;visibility:visible;}.back-to-top:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(22,119,255,0.5);}@media (max-width:1024px){.contact-layout{grid-template-columns:1fr;gap:40px;}.footer-grid{grid-template-columns:1fr 1fr;}}@media (max-width:768px){.contact-layout{grid-template-columns:1fr;}.form-row{grid-template-columns:1fr;}.sfb-row{grid-template-columns:1fr;}.footer-grid{grid-template-columns:1fr;gap:32px;}.hero-content{grid-template-columns:1fr;gap:40px;}.hero-visual{display:none;}.products-grid{grid-template-columns:1fr;}.hardware-grid{grid-template-columns:1fr 1fr;}.highlight-grid{grid-template-columns:1fr 1fr;}.news-grid{grid-template-columns:1fr;}.solution-detail{grid-template-columns:1fr;}.tab-content{padding:32px 20px;}}@media (max-width:480px){.hardware-grid{grid-template-columns:1fr;}.highlight-grid{grid-template-columns:1fr;}.hero-stats{grid-template-columns:1fr 1fr;}}#qr-lightbox{display:none;position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,0.75);align-items:center;justify-content:center;cursor:pointer;}#qr-lightbox.active{display:flex;}.qr-lb-box{background:#fff;border-radius:20px;padding:32px 28px 24px;max-width:380px;width:90%;text-align:center;box-shadow:0 24px 64px rgba(0,0,0,0.3);cursor:default;position:relative;}.qr-lb-box img#qr-lb-img{width:200px;height:200px;object-fit:contain;border-radius:12px;display:block;margin:0 auto 16px;}.qr-lb-title{font-size:1.1rem;font-weight:700;color:#1a1a2e;margin-bottom:4px;}.qr-lb-handle{font-size:0.85rem;color:#718096;margin-bottom:12px;}.qr-lb-hint{font-size:0.78rem;color:#b0bec5;padding-top:12px;border-top:1px solid #f0f0f0;}.sfb-qr-wrap{cursor:pointer;transition:transform 0.2s;}.sfb-qr-wrap:hover{transform:scale(1.05);}.float-consult-btn:hover 50%{box-shadow:0 6px 28px rgba(22,119,255,0.65);}}.modal-close:hover{color:#333;}.modal-content h3{font-size:1.3rem;font-weight:700;color:#1a1a2e;margin:0 0 8px;}.modal-content > p{font-size:0.9rem;color:#718096;margin:0 0 24px;}#global-contact-form input,#global-contact-form select,#global-contact-form textarea{width:100%;padding:12px 16px;border:1px solid #e2e8f0;border-radius:10px;font-size:14px;margin-bottom:14px;transition:border-color 0.2s;box-sizing:border-box;}#global-contact-form input:focus,#global-contact-form select:focus,#global-contact-form textarea:focus{outline:none;border-color:#1677ff;box-shadow:0 0 0 3px rgba(22,119,255,0.1);}#global-contact-form textarea{resize:vertical;min-height:80px;}#global-contact-form button[type="submit"]{width:100%;padding:14px;background:var(--gradient);color:#fff;border:none;border-radius:10px;font-size:15px;font-weight:700;cursor:pointer;transition:opacity 0.2s;}#global-contact-form button[type="submit"]:hover{opacity:0.9;}#global-contact-form button[type="submit"]:disabled{opacity:0.6;cursor:not-allowed;}.modal-qr-section p{font-size:0.85rem;color:#718096;margin:0 0 12px;}.modal-qr-section img{width:160px;height:160px;border-radius:12px;border:2px solid #e8f0fe;}@media (max-width:768px){}.cases-section{background:#fff;}.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}.case-card{background:var(--bg-card);border-radius:var(--radius-lg);border:1px solid var(--border);overflow:hidden;transition:var(--transition);}.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);}.case-img-wrap{position:relative;overflow:hidden;height:200px;}.case-img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease;}.case-card:hover .case-img{transform:scale(1.05);}.case-badge{position:absolute;top:12px;left:12px;background:var(--gradient);color:#fff;padding:4px 14px;border-radius:20px;font-size:12px;font-weight:600;}.case-body{padding:28px 24px;}.case-title{font-size:1.1rem;font-weight:800;color:var(--text-primary);margin-bottom:12px;line-height:1.4;}.case-desc{font-size:14px;color:var(--text-secondary);line-height:1.8;margin-bottom:16px;}.case-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}.ctag{display:inline-block;background:rgba(22,119,255,0.08);color:var(--primary);padding:3px 10px;border-radius:6px;font-size:12px;font-weight:600;}.case-result{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;}.cr-item{text-align:center;padding:10px 0;background:var(--bg-light);border-radius:8px;}.cr-num{display:block;font-size:1.15rem;font-weight:900;color:var(--primary);}.cr-label{font-size:11px;color:var(--text-light);margin-top:2px;display:block;}.cases-cta{text-align:center;margin-top:48px;padding:32px;background:var(--bg-light);border-radius:var(--radius);}.cases-cta p{font-size:16px;color:var(--text-secondary);margin-bottom:16px;}.cases-cta strong{color:var(--primary);}.about-section{background:var(--bg-light);}.about-layout{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}.about-text .section-tag{margin-bottom:16px;}.about-text .section-title{text-align:left;margin-bottom:20px;}.about-desc{font-size:16px;color:var(--text-secondary);line-height:1.9;margin-bottom:32px;}.about-values{display:flex;flex-direction:column;gap:20px;margin-bottom:32px;}.value-item{display:flex;align-items:flex-start;gap:16px;}.value-icon{font-size:1.6rem;flex-shrink:0;}.value-item h4{font-size:1rem;font-weight:700;color:var(--text-primary);margin-bottom:4px;}.value-item p{font-size:14px;color:var(--text-secondary);line-height:1.6;}.about-visual{display:flex;justify-content:center;}.about-cards{display:grid;grid-template-columns:1fr 1fr;gap:20px;}.about-stat-card{background:#fff;border-radius:var(--radius);padding:28px 24px;text-align:center;border:1px solid var(--border);transition:var(--transition);}.about-stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(22,119,255,0.2);}.about-stat-num{display:block;font-size:2rem;font-weight:900;color:var(--primary);line-height:1.1;margin-bottom:6px;}.about-stat-label{font-size:13px;color:var(--text-secondary);}@media (max-width:1024px){.cases-grid{grid-template-columns:repeat(2,1fr);}.about-layout{grid-template-columns:1fr;gap:40px;}}@media (max-width:768px){.cases-grid{grid-template-columns:1fr;}.about-cards{grid-template-columns:1fr 1fr;}}@media (max-width:480px){.about-cards{grid-template-columns:1fr;}.case-result{grid-template-columns:1fr;}}

/* =========================================
   Mobile Responsive V4 (Hotfix: Blank Menu)
   ========================================= */
@media (max-width: 992px) {
  .nav-container {
    display: flex !important;
    justify-content: space-between;
    align-items: center;
    height: 64px;
    padding: 0 16px;
    position: relative;
  }

  .nav-toggle {
    position: fixed !important;
    top: 12px !important;
    right: 16px !important;
    display: flex !important;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: #fff;
    color: var(--primary);
    font-size: 20px;
    z-index: 1003 !important;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  }

  .nav-cta { display: none !important; }
  .logo-img { height: 38px !important; }

  /* 菜单面板：彻底重写，清除所有桌面端 Flex 干扰 */
  .nav-links {
    display: flex !important;
    flex-direction: column !important;
    justify-content: flex-start !important;
    align-items: stretch !important;
    gap: 0 !important;
    flex-wrap: nowrap !important;
    
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    padding-top: 74px !important;
    
    background: #ffffff !important; /* 纯白背景，避免 backdrop-filter 渲染异常 */
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch;
    
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 1001 !important;
  }
  .nav-links.mobile-active { transform: translateX(0); }

  /* 菜单项：强制深色文字 + 换行 */
  .nav-link, .nav-dropdown {
    display: block !important;
    width: 100% !important;
    padding: 16px 24px !important;
    font-size: 17px !important;
    line-height: 1.5 !important;
    color: #1a1a2e !important; /* 强制深色 */
    background: transparent !important;
    border-bottom: 1px solid #f0f0f0;
    white-space: normal !important; /* 允许换行 */
    text-align: left !important;
  }
  
  /* 手机端子菜单 */
  .dropdown-menu {
    display: block !important;
    position: static !important;
    background: #f8faff !important;
    padding: 0 0 0 24px !important;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav-dropdown.active .dropdown-menu { max-height: 600px; }
  .dropdown-menu a {
    display: block !important;
    padding: 14px 0 !important;
    font-size: 15px !important;
    color: #4a5568 !important;
    white-space: normal !important;
  }

  body.menu-open { overflow: hidden !important; }

  /* 全局间距 */
  .hero { padding-top: 130px; padding-bottom: 60px; }
  .hero-title { font-size: 1.75rem !important; line-height: 1.3; }
  .section { padding: 60px 0; }
  .section-title { font-size: 1.5rem; }
  .container { padding: 0 16px; }
  .section-header { margin-bottom: 32px; }
  .footer { padding: 40px 0 20px; }
  .footer-logo img { height: 38px !important; }
  .footer-slogan { font-size: 12px; }
  
  .sd-hero { padding-top: 130px; padding-bottom: 40px; }
  .sd-hero h1 { font-size: 1.6rem !important; }
  .sd-intro-grid { grid-template-columns: 1fr !important; gap: 24px; }
  .sd-features-grid { grid-template-columns: 1fr !important; gap: 16px; }
  .sd-scenes-grid { grid-template-columns: 1fr !important; }
}