/* ===== CSS Variables ===== */
:root {
  --primary: #1A73E8;
  --primary-dark: #1557B0;
  --primary-light: #E8F0FE;
  --accent: #00C853;
  --accent-dark: #00A040;
  --accent-light: #E8F8EE;
  --dark: #1D1D1F;
  --gray-1: #4A4A4A;
  --gray-2: #86868B;
  --gray-3: #D2D2D7;
  --bg-light: #F5F7FA;
  --bg-alt: #FAFBFC;
  --white: #FFFFFF;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow: 0 4px 20px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,.12);
  --max-w: 1200px;
  --font: 'Microsoft YaHei','PingFang SC','Helvetica Neue',Arial,sans-serif;
  --mono: 'Consolas','Monaco','Courier New',monospace;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);color:var(--dark);line-height:1.7;background:var(--white);overflow-x:hidden}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
img{max-width:100%;display:block}
ul,ol{list-style:none}
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-lg{padding:100px 0}
.bg-light{background:var(--bg-light)}
.bg-alt{background:var(--bg-alt)}
.text-center{text-align:center}
.section-title{font-size:2rem;font-weight:700;color:var(--dark);margin-bottom:12px;text-align:center}
.section-subtitle{font-size:1.1rem;color:var(--gray-2);text-align:center;margin-bottom:48px}

/* ===== Navbar ===== */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--gray-3);transition:box-shadow .3s}
.navbar.scrolled{box-shadow:var(--shadow-sm)}
.navbar-inner{max-width:var(--max-w);margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between}
.navbar-logo{font-size:1.3rem;font-weight:700;color:var(--dark);display:flex;align-items:center;gap:8px}
.navbar-logo span{color:var(--primary)}
.navbar-logo .dot{width:8px;height:8px;background:var(--accent);border-radius:50%;display:inline-block}
.navbar-nav{display:flex;gap:32px;align-items:center}
.navbar-nav a{color:var(--gray-1);font-size:.95rem;font-weight:500}
.navbar-nav a:hover,.navbar-nav a.active{color:var(--primary)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 24px;border-radius:var(--radius-sm);font-size:.95rem;font-weight:600;cursor:pointer;border:none;transition:all .25s;font-family:var(--font)}
.btn-primary{background:var(--primary);color:var(--white)}
.btn-primary:hover{background:var(--primary-dark);color:var(--white);transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-outline{background:transparent;color:var(--primary);border:1.5px solid var(--primary)}
.btn-outline:hover{background:var(--primary-light)}
.btn-accent{background:var(--accent);color:var(--white)}
.btn-accent:hover{background:var(--accent-dark);color:var(--white)}
.btn-lg{padding:14px 36px;font-size:1.05rem}
.navbar-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--dark)}

/* ===== Hero ===== */
.hero{min-height:600px;padding:120px 0 80px;background:linear-gradient(135deg,#F0F6FF 0%,#FFF 50%,#F0FFF4 100%);position:relative;overflow:hidden}
.hero-inner{display:flex;align-items:center;gap:60px}
.hero-content{flex:1}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:var(--primary-light);color:var(--primary);padding:6px 16px;border-radius:20px;font-size:.85rem;font-weight:600;margin-bottom:20px}
.hero h1{font-size:2.8rem;font-weight:800;line-height:1.3;color:var(--dark);margin-bottom:20px}
.hero h1 .highlight{color:var(--primary)}
.hero-subtitle{font-size:1.15rem;color:var(--gray-1);margin-bottom:36px;line-height:1.8}
.hero-cta-group{display:flex;gap:16px;flex-wrap:wrap}
.hero-panel{flex:0 0 420px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.data-card{background:var(--white);border-radius:var(--radius);padding:24px 20px;box-shadow:var(--shadow);text-align:center;transition:transform .3s}
.data-card:hover{transform:translateY(-4px)}
.data-card .num{font-size:1.8rem;font-weight:800;color:var(--primary);line-height:1.2}
.data-card .num .suffix{font-size:1rem;font-weight:600}
.data-card .label{font-size:.85rem;color:var(--gray-2);margin-top:6px}
.data-card.accent .num{color:var(--accent-dark)}

/* ===== Trust Bar ===== */
.trust-bar{background:var(--dark);color:var(--white);padding:16px 0;overflow:hidden}
.trust-bar-inner{display:flex;gap:40px;align-items:center;justify-content:center;flex-wrap:wrap}
.trust-bar-item{display:flex;align-items:center;gap:8px;font-size:.9rem;white-space:nowrap}
.trust-bar-item .dot{width:6px;height:6px;background:var(--accent);border-radius:50%;flex-shrink:0}

/* ===== Product Cards ===== */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.product-card{background:var(--white);border:1px solid var(--gray-3);border-radius:var(--radius);padding:32px 24px;transition:all .3s;position:relative}
.product-card:hover{border-color:var(--primary);box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.product-card .icon{width:56px;height:56px;background:var(--primary-light);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:20px}
.product-card h3{font-size:1.2rem;font-weight:700;margin-bottom:8px}
.product-card .tag{display:inline-block;background:var(--primary-light);color:var(--primary);padding:2px 10px;border-radius:12px;font-size:.78rem;font-weight:600;margin-bottom:12px}
.product-card .specs{font-size:.85rem;color:var(--gray-2);line-height:1.8}
.product-card .specs li{padding-left:16px;position:relative}
.product-card .specs li::before{content:'\00B7';position:absolute;left:4px;color:var(--primary);font-weight:700}

/* ===== Advantages ===== */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.adv-card{text-align:center;padding:40px 20px;border-radius:var(--radius);background:var(--white);border:1px solid var(--gray-3);transition:all .3s}
.adv-card:hover{border-color:var(--primary);box-shadow:var(--shadow)}
.adv-card .icon{font-size:2rem;margin-bottom:16px}
.adv-card h3{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.adv-card p{font-size:.9rem;color:var(--gray-2);line-height:1.6}

/* ===== Scenario Cards ===== */
.scenario-scroll{display:flex;gap:20px;overflow-x:auto;padding-bottom:16px;scroll-snap-type:x mandatory}
.scenario-scroll::-webkit-scrollbar{height:6px}
.scenario-scroll::-webkit-scrollbar-track{background:var(--bg-light);border-radius:3px}
.scenario-scroll::-webkit-scrollbar-thumb{background:var(--gray-3);border-radius:3px}
.scenario-card{flex:0 0 300px;background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:all .3s;scroll-snap-align:start;cursor:pointer}
.scenario-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.scenario-card .img{width:100%;height:160px;background:linear-gradient(135deg,var(--primary-light),var(--bg-light));display:flex;align-items:center;justify-content:center;font-size:2.5rem}
.scenario-card .body{padding:20px}
.scenario-card h3{font-size:1.1rem;font-weight:700;margin-bottom:6px}
.scenario-card p{font-size:.85rem;color:var(--gray-2)}
.scenario-card .data{font-size:.8rem;color:var(--primary);font-weight:600;margin-top:8px}

/* ===== Coverage ===== */
.coverage-stats{display:flex;justify-content:center;gap:60px;margin-bottom:48px}
.coverage-stats .stat .num{font-size:2.5rem;font-weight:800;color:var(--primary)}
.coverage-stats .stat .label{font-size:.95rem;color:var(--gray-2)}
.world-map{max-width:800px;margin:0 auto}
.world-map svg{width:100%;height:auto}
.map-region{fill:var(--gray-3);stroke:var(--white);stroke-width:1;cursor:pointer;transition:fill .3s}
.map-region:hover{fill:var(--primary)}
.region-tabs{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:32px}
.region-tab{padding:8px 20px;border-radius:20px;background:var(--bg-light);color:var(--gray-1);font-size:.9rem;cursor:pointer;transition:all .2s;border:none;font-family:var(--font)}
.region-tab:hover{background:var(--primary-light);color:var(--primary)}
.region-tab.active{background:var(--primary);color:var(--white)}
.region-detail{margin-top:32px;display:none}
.region-detail.active{display:block}
.region-detail h4{font-size:1.1rem;margin-bottom:12px;color:var(--dark)}
.region-detail .operators{display:flex;flex-wrap:wrap;gap:10px}
.region-detail .operators span{background:var(--bg-light);padding:6px 14px;border-radius:16px;font-size:.85rem;color:var(--gray-1)}

/* ===== Cases ===== */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{background:var(--white);border:1px solid var(--gray-3);border-radius:var(--radius);padding:28px 24px;transition:all .3s}
.case-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);border-color:var(--primary)}
.case-card .industry{font-size:.8rem;color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:1px;margin-bottom:12px}
.case-card h3{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.case-card .result{font-size:.95rem;color:var(--gray-1);margin-bottom:12px;line-height:1.6}
.case-card .metrics{display:flex;gap:16px;flex-wrap:wrap}
.case-card .metric{font-size:.8rem;color:var(--gray-2)}
.case-card .metric strong{color:var(--primary);font-size:1.1rem;display:block}

/* ===== CTA / Form ===== */
.cta-section{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:var(--white);border-radius:var(--radius);padding:60px;display:flex;gap:60px;align-items:center}
.cta-section .form-side{flex:1}
.cta-section .qr-side{flex:0 0 280px;text-align:center}
.cta-section h2{font-size:1.8rem;margin-bottom:8px}
.cta-section p{opacity:.9;margin-bottom:24px}
.cta-form{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.cta-form .full{grid-column:1/-1}
.cta-form input,.cta-form select,.cta-form textarea{width:100%;padding:12px 16px;border:1px solid rgba(255,255,255,.3);border-radius:var(--radius-sm);background:rgba(255,255,255,.1);color:var(--white);font-size:.95rem;font-family:var(--font)}
.cta-form input::placeholder,.cta-form textarea::placeholder{color:rgba(255,255,255,.6)}
.cta-form input:focus,.cta-form select:focus,.cta-form textarea:focus{outline:none;border-color:var(--white);background:rgba(255,255,255,.15)}
.cta-form select option{color:var(--dark)}
.cta-form .btn{grid-column:1/-1}
.qr-placeholder{width:200px;height:200px;background:var(--white);border-radius:var(--radius);margin:0 auto 16px;display:flex;align-items:center;justify-content:center;color:var(--gray-2);font-size:.85rem}
.service-tags{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:16px}
.service-tag{background:rgba(255,255,255,.15);padding:6px 14px;border-radius:16px;font-size:.82rem}

/* ===== Footer ===== */
.footer{background:var(--dark);color:var(--gray-2);padding:60px 0 30px}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand h3{color:var(--white);font-size:1.3rem;margin-bottom:12px}
.footer-brand p{font-size:.9rem;line-height:1.6;max-width:300px}
.footer-col h4{color:var(--white);font-size:1rem;margin-bottom:16px}
.footer-col a{color:var(--gray-2);font-size:.9rem;display:block;margin-bottom:10px;transition:color .2s}
.footer-col a:hover{color:var(--white)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;text-align:center;font-size:.85rem}

/* ===== Floating Widgets ===== */
.float-widgets{position:fixed;right:20px;bottom:80px;z-index:999;display:flex;flex-direction:column;gap:12px}
.float-btn{width:56px;height:56px;border-radius:50%;background:var(--white);box-shadow:var(--shadow);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s;border:none;font-size:1.3rem;color:var(--primary)}
.float-btn:hover{background:var(--primary);color:var(--white);transform:scale(1.1)}
.float-qr{position:absolute;right:70px;bottom:0;background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:16px;display:none;text-align:center}
.float-qr.active{display:block}
.float-qr .qr-img{width:160px;height:160px;background:var(--bg-light);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:var(--gray-2);font-size:.8rem;margin-bottom:8px}
.float-qr p{font-size:.8rem;color:var(--gray-1)}

/* ===== Page Header ===== */
.page-header{background:linear-gradient(135deg,#F0F6FF 0%,#FFF 100%);padding:120px 0 60px;text-align:center}
.page-header h1{font-size:2.5rem;font-weight:800;color:var(--dark);margin-bottom:12px}
.page-header p{font-size:1.1rem;color:var(--gray-2);max-width:600px;margin:0 auto}
.breadcrumb{font-size:.85rem;color:var(--gray-2);margin-bottom:24px}
.breadcrumb a{color:var(--gray-2)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb span{margin:0 8px}

/* ===== Content Page ===== */
.content-page{padding:60px 0}
.content-page h2{font-size:1.6rem;font-weight:700;color:var(--dark);margin:40px 0 16px}
.content-page h3{font-size:1.3rem;font-weight:600;color:var(--dark);margin:32px 0 12px}
.content-page p{margin-bottom:16px;color:var(--gray-1)}
.content-page ul{margin-bottom:16px;padding-left:20px}
.content-page ul li{position:relative;padding-left:20px;margin-bottom:8px;color:var(--gray-1)}
.content-page ul li::before{content:'\2022';position:absolute;left:0;color:var(--primary);font-weight:700}
.content-page .info-table{width:100%;border-collapse:collapse;margin:24px 0;font-size:.95rem}
.content-page .info-table th{background:var(--primary);color:var(--white);padding:12px 16px;text-align:left;font-weight:600}
.content-page .info-table td{padding:10px 16px;border:1px solid var(--gray-3)}
.content-page .info-table tr:nth-child(even) td{background:var(--bg-light)}

/* ===== Selector (interactive card type selector) ===== */
.selector-box{background:var(--white);border:1px solid var(--gray-3);border-radius:var(--radius);padding:40px;max-width:720px;margin:0 auto}
.selector-step{margin-bottom:24px}
.selector-step .label{font-weight:600;margin-bottom:12px;color:var(--dark)}
.selector-options{display:flex;flex-wrap:wrap;gap:12px}
.selector-option{padding:12px 24px;border:2px solid var(--gray-3);border-radius:var(--radius-sm);cursor:pointer;transition:all .2s;background:var(--white);font-size:.95rem;font-family:var(--font)}
.selector-option:hover{border-color:var(--primary)}
.selector-option.selected{border-color:var(--primary);background:var(--primary-light);color:var(--primary);font-weight:600}
.selector-result{margin-top:32px;padding:24px;background:var(--bg-light);border-radius:var(--radius);display:none}
.selector-result.active{display:block}

/* ===== Animations ===== */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes countUp{from{opacity:0}to{opacity:1}}
.fade-in{opacity:0;animation:fadeInUp .8s ease forwards}
.fade-in.delay-1{animation-delay:.1s}
.fade-in.delay-2{animation-delay:.2s}
.fade-in.delay-3{animation-delay:.3s}
.fade-in.delay-4{animation-delay:.4s}

/* ===== Mobile Responsive ===== */
@media(max-width:1024px){
  .hero-inner{flex-direction:column}
  .hero-panel{flex:0 0 100%;max-width:500px}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .cta-section{flex-direction:column;padding:40px}
  .cta-section .qr-side{flex:0 0 auto}
  .footer-inner{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .navbar-nav{display:none;position:absolute;top:64px;left:0;right:0;background:var(--white);flex-direction:column;padding:20px;box-shadow:var(--shadow);gap:16px}
  .navbar-nav.open{display:flex}
  .navbar-toggle{display:block}
  .hero{padding:100px 0 60px}
  .hero h1{font-size:1.8rem}
  .hero-subtitle{font-size:1rem}
  .hero-panel{grid-template-columns:1fr 1fr;gap:12px}
  .data-card{padding:16px 12px}
  .data-card .num{font-size:1.3rem}
  .product-grid{grid-template-columns:1fr}
  .adv-grid{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
  .section{padding:50px 0}
  .section-title{font-size:1.5rem}
  .coverage-stats{flex-direction:column;gap:24px}
  .cta-form{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr;gap:24px}
  .float-widgets{right:12px;bottom:60px}
  .float-btn{width:48px;height:48px;font-size:1.1rem}
}