:root {
            --bg: #ffffff;
            --surface-light: #fcfcfc;
            --surface: #fafbfc;
            --border: #e5e8eb;
            --border-light: #eef0f2;
            --text: #0d1117;
            --text-primary: #161b22;
            --text-secondary: #4a5568;
            --text-muted: #7c8898;
            --text-light: #9aa3ae;
            --primary: #0b2d4a;
            --primary-hover: #143d5e;
            --primary-light: #e8f0f7;
            --accent: #0d9488;
            --accent-hover: #0f766e;
            --accent-light: #e6fffa;
            --accent-soft: #f0fdf9;
            --red: #dc2626;
            --red-light: #fef2f2;
            --amber: #b45309;
            --amber-light: #fffbeb;
            --purple: #7c3aed;
            --purple-light: #f5f3ff;
            --blue: #2563eb;
            --blue-light: #eff6ff;
            --green: #10b981;
            --green-light: #ecfdf5;
            --slate: #475569;
            --radius-sm: 6px;
            --radius: 8px;
            --radius-lg: 10px;
            --radius-xl: 12px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.03);
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04),0 1px 2px rgba(0,0,0,0.02);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.05),0 2px 4px rgba(0,0,0,0.02);
            --shadow-lg: 0 8px 24px rgba(0,0,0,0.06),0 4px 8px rgba(0,0,0,0.02);
            --shadow-xl: 0 12px 36px rgba(0,0,0,0.07),0 6px 12px rgba(0,0,0,0.02);
            --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
            --transition-slow: 0.3s cubic-bezier(0.4,0,0.2,1);
            --max-width: 1560px;
        }
        *{margin:0;padding:0;box-sizing:border-box;}
        html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;}
        body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;line-height:1.6;color:var(--text-primary);background:var(--bg);font-size:15px;letter-spacing:-0.01em;}
        .container{max-width:var(--max-width);margin:0 auto;padding:0 48px;}

        .header{background:rgba(255,255,255,0.9);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border-light);position:sticky;top:0;z-index:100;padding:15px 0;}
        .header-container{display:flex;align-items:center;justify-content:space-between;gap:28px;}
        .logo{display:flex;align-items:center;text-decoration:none;font-weight:700;font-size:1.25rem;color:var(--text-primary);letter-spacing:-0.4px;gap:10px;}
        .logo-icon{background:var(--primary);color:#fff;width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);font-weight:700;font-size:0.75rem;letter-spacing:0.2px;}
        .nav{display:flex;gap:30px;align-items:center;}
        .nav a{text-decoration:none;color:var(--text-secondary);font-weight:500;font-size:0.88rem;transition:color var(--transition);white-space:nowrap;letter-spacing:-0.1px;}
        .nav a:hover{color:var(--primary);}
        .btn{display:inline-flex;align-items:center;gap:7px;padding:10px 20px;border-radius:var(--radius-sm);font-weight:600;font-size:0.88rem;text-decoration:none;transition:all var(--transition);cursor:pointer;border:none;white-space:nowrap;letter-spacing:-0.2px;line-height:1;}
        .btn-primary{background:var(--primary);color:#fff;box-shadow:0 2px 8px rgba(11,45,74,0.1);}
        .btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 6px 16px rgba(11,45,74,0.16);}
        .btn-outline{border:1.5px solid var(--border);color:var(--text-primary);background:#fff;}
        .btn-outline:hover{border-color:#c5cad2;background:#fafbfc;}
        .btn-ghost{border:1.5px solid rgba(255,255,255,0.45);color:#fff;background:transparent;}
        .btn-ghost:hover{background:rgba(255,255,255,0.07);border-color:rgba(255,255,255,0.7);}
        .btn-white{background:#fff;color:var(--primary);box-shadow:0 2px 10px rgba(0,0,0,0.05);}
        .btn-white:hover{background:#fafbfc;transform:translateY(-1px);box-shadow:0 6px 20px rgba(0,0,0,0.08);}
        .btn-tel{background:transparent;color:var(--primary);font-weight:700;font-size:0.92rem;gap:6px;padding:8px 14px;letter-spacing:-0.2px;}
        .btn-tel i{font-size:0.8rem;color:var(--accent);}

        .hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;background:none;border:none;}
        .hamburger span{display:block;width:22px;height:2px;background:var(--text-primary);border-radius:2px;transition:all var(--transition);}
        .mobile-menu{display:none;flex-direction:column;gap:4px;padding:16px 0;border-top:1px solid var(--border-light);margin-top:14px;}
        .mobile-menu a{padding:10px 0;text-decoration:none;color:var(--text-secondary);font-weight:500;font-size:0.9rem;border-bottom:1px solid var(--border-light);}
        .mobile-menu.active{display:flex;}

        /* 面包屑 */
        .breadcrumb-nav{padding:18px 0 0;font-size:0.85rem;color:var(--text-muted);letter-spacing:-0.1px;}
        .breadcrumb-nav a{color:var(--text-muted);text-decoration:none;transition:color var(--transition);}
        .breadcrumb-nav a:hover{color:var(--primary);}
        .breadcrumb-nav span{margin:0 6px;color:var(--text-light);}
        .breadcrumb-nav .current{color:var(--text-secondary);font-weight:500;}

        .section{padding:80px 0;}
        .section-alt{background:var(--surface-light);padding:80px 0;}

        .tag{display:inline-flex;align-items:center;gap:7px;font-size:0.78rem;font-weight:600;text-transform:uppercase;letter-spacing:0.7px;color:var(--accent);margin-bottom:14px;}
        .tag::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--accent);flex-shrink:0;}
        .tag-on-dark{color:rgba(255,255,255,0.75);}
        .tag-on-dark::before{background:var(--accent);}

        .section-title{font-size:2.1rem;font-weight:700;letter-spacing:-0.6px;margin-bottom:12px;color:var(--text);line-height:1.25;}
        .section-subtitle{font-size:1.05rem;color:var(--text-muted);max-width:720px;line-height:1.7;font-weight:400;}
        .section-header{margin-bottom:52px;}
        .section-header.center{text-align:center;}
        .section-header.center .section-subtitle{margin:0 auto;}
        .section-header.center .tag{margin-left:auto;margin-right:auto;display:inline-flex;}

        .cta-inline{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-weight:600;font-size:0.9rem;text-decoration:none;transition:all var(--transition);white-space:nowrap;padding:6px 0;border-bottom:1.5px solid transparent;}
        .cta-inline:hover{gap:11px;border-bottom-color:var(--primary);}
        .cta-inline i{font-size:0.7rem;transition:transform var(--transition);}
        .cta-inline:hover i{transform:translateX(2px);}

        .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;}
        .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
        .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}

        .card,.card-light,.card-on-dark,.faq-item{transition:all var(--transition-slow);}
        .card:hover,.card-light:hover{border-color:var(--primary)!important;box-shadow:var(--shadow-lg);transform:translateY(-1px);}
        .card-on-dark:hover{border-color:rgba(255,255,255,0.25)!important;box-shadow:0 8px 24px rgba(0,0,0,0.25);transform:translateY(-2px);}
        .faq-item:hover{border-color:var(--primary)!important;box-shadow:var(--shadow-md);}

        .card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius);padding:28px 26px;box-shadow:var(--shadow-sm);}
        .card .card-header-row{display:flex;align-items:center;gap:12px;margin-bottom:10px;}
        .card .card-icon-sm{width:36px;height:36px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:0.9rem;color:#fff;flex-shrink:0;}
        .card h3{font-size:1rem;font-weight:600;letter-spacing:-0.3px;color:var(--text);margin:0;}
        .card p{font-size:0.88rem;color:var(--text-muted);line-height:1.6;font-weight:400;}

        .card-light{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius);padding:22px 20px;box-shadow:var(--shadow-xs);}
        .card-light .card-header-row{display:flex;align-items:center;gap:10px;margin-bottom:8px;}
        .card-light .light-icon{font-size:1rem;color:var(--accent);flex-shrink:0;transition:color var(--transition);width:20px;text-align:center;}
        .card-light:hover .light-icon{color:var(--primary);}
        .card-light h3{font-size:0.93rem;font-weight:600;letter-spacing:-0.2px;color:var(--text);margin:0;}
        .card-light p{font-size:0.83rem;color:var(--text-muted);line-height:1.5;}
        .card-light .case-title{font-size:0.95rem;font-weight:600;margin-bottom:7px;letter-spacing:-0.2px;color:var(--text);}

        .hero{padding:32px 0 0;background:var(--bg);position:relative;overflow:hidden;}
        .hero-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:center;padding-top:20px;}
        .hero h1{font-size:2.9rem;font-weight:800;line-height:1.18;letter-spacing:-1px;margin-bottom:18px;color:var(--text);}
        .hero h1 span{color:var(--primary);}
        .hero-desc{font-size:1rem;color:var(--text-secondary);line-height:1.7;margin-bottom:26px;font-weight:400;max-width:560px;}
        .hero-stats{display:flex;gap:40px;margin-bottom:30px;flex-wrap:wrap;}
        .hero-stat .num-wrap{position:relative;display:inline-block;line-height:1;}
        .hero-stat .num{font-size:2.4rem;font-weight:700;color:var(--primary);letter-spacing:-0.6px;line-height:1;padding-right:2px;}
        .hero-stat .superscript{position:absolute;bottom:-1px;right:-16px;font-size:0.75rem;font-weight:700;color:var(--primary);line-height:1;}
        .hero-stat .label{font-size:0.82rem;color:var(--text-muted);margin-top:6px;font-weight:500;line-height:1.3;max-width:170px;}
        .hero-actions{display:flex;gap:12px;flex-wrap:wrap;}

        .hero-visual-dark{background:var(--primary);border-radius:var(--radius-lg);padding:36px 28px;text-align:center;box-shadow:var(--shadow-xl);}
        .hero-visual-dark .flow-label{font-weight:600;font-size:0.9rem;color:rgba(255,255,255,0.85);letter-spacing:-0.2px;margin-bottom:22px;}
        .flow-inline{display:flex;align-items:center;justify-content:center;gap:0;flex-wrap:nowrap;}
        .flow-node{text-align:center;flex-shrink:0;display:flex;flex-direction:column;align-items:center;width:90px;}
        .flow-node .icon-circle-white{width:50px;height:50px;border-radius:50%;background:#fff;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:var(--primary);border:2px solid #fff;box-shadow:0 4px 12px rgba(0,0,0,0.18);transition:all var(--transition);flex-shrink:0;}
        .flow-node .icon-circle-white.danger{color:#dc2626;border-color:#fecaca;background:#fff;}
        .flow-node span{font-size:0.78rem;color:#fff;font-weight:500;letter-spacing:-0.1px;white-space:nowrap;margin-top:8px;}
        .flow-arrow-wrap{display:flex;align-items:center;justify-content:center;flex-shrink:0;width:48px;height:50px;}
        .flow-arrow-icon-white{color:rgba(255,255,255,0.35);font-size:0.8rem;display:flex;align-items:center;justify-content:center;line-height:1;}

        .capability-dark{background:var(--primary);padding:80px 0;position:relative;overflow:hidden;}
        .capability-dark::before{content:'';position:absolute;top:-120px;right:-180px;width:500px;height:500px;background:radial-gradient(circle,rgba(255,255,255,0.03) 0%,transparent 70%);border-radius:50%;pointer-events:none;}
        .capability-dark .section-title{color:#fff;}
        .capability-dark .section-subtitle{color:rgba(255,255,255,0.65);}
        .card-on-dark{background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.08);border-radius:var(--radius);padding:32px 28px;position:relative;z-index:1;}
        .card-on-dark .card-header-row{display:flex;align-items:center;gap:12px;margin-bottom:10px;}
        .card-on-dark .card-icon-dark{width:40px;height:40px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1rem;color:#fff;flex-shrink:0;box-shadow:0 3px 10px rgba(0,0,0,0.2);}
        .card-on-dark h3{font-size:1.05rem;font-weight:700;letter-spacing:-0.3px;color:#fff;margin:0;}
        .card-on-dark p{font-size:0.9rem;color:rgba(255,255,255,0.65);line-height:1.65;font-weight:400;}

        .scene-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:20px;}
        .scene-tag{display:inline-block;font-size:0.82rem;font-weight:500;color:var(--primary);background:var(--primary-light);padding:6px 16px;border-radius:20px;letter-spacing:-0.1px;white-space:nowrap;}

        .trust-block{border-left:3px solid var(--accent);padding:16px 20px;background:var(--accent-soft);border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin-top:20px;}
        .trust-block p{font-size:0.92rem;font-weight:500;color:#0f5c56;line-height:1.6;letter-spacing:-0.2px;}

        .compare-table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow-sm);background:#fff;position:relative;}
        .compare-table-wrap::after{content:'← 左右滑动查看 →';display:none;text-align:center;font-size:0.75rem;color:var(--text-light);padding:10px;letter-spacing:0.3px;}
        .compare-table{width:100%;border-collapse:collapse;min-width:720px;}
        .compare-table thead th{background:#fafbfc;padding:15px 20px;font-weight:600;font-size:0.88rem;text-align:left;border-bottom:2px solid var(--border);letter-spacing:-0.2px;color:var(--text);}
        .compare-table thead th:first-child{width:20%;}
        .compare-table thead th:nth-child(2){width:36%;color:var(--text-muted);font-weight:500;}
        .compare-table thead th:nth-child(3){width:44%;color:var(--primary);}
        .compare-table td{padding:15px 20px;font-size:0.88rem;border-bottom:1px solid var(--border-light);color:var(--text-secondary);line-height:1.5;vertical-align:top;}
        .compare-table tbody tr.row-key{background:#fafdfc;}
        .compare-table tbody tr:hover{background:#f6f8fa;}
        .compare-table .col-label{font-weight:600;color:var(--text);letter-spacing:-0.2px;}
        .compare-table .col-before{color:var(--text-muted);}
        .compare-table .col-after{color:#0f5c56;font-weight:500;}
        .compare-table .check-circle{display:inline-flex;align-items:center;justify-content:center;width:16px;height:16px;border-radius:50%;background:var(--primary);color:#fff;font-size:0.5rem;margin-right:6px;flex-shrink:0;vertical-align:middle;}

        .case-tag-inline{display:inline-block;font-size:0.73rem;font-weight:600;color:#fff;background:var(--primary);padding:4px 10px;border-radius:20px;margin-bottom:10px;letter-spacing:0.2px;}

        .faq-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
        .faq-item{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow-xs);}
        .faq-item .faq-title-row{display:flex;align-items:flex-start;gap:10px;margin-bottom:7px;}
        .faq-item .faq-icon{width:20px;height:20px;border-radius:50%;background:var(--primary-light);display:flex;align-items:center;justify-content:center;font-size:0.65rem;color:var(--primary);flex-shrink:0;margin-top:2px;font-weight:700;}
        .faq-item h3{font-size:0.92rem;font-weight:600;color:var(--text);letter-spacing:-0.2px;margin:0;}
        .faq-item p{font-size:0.85rem;color:var(--text-muted);line-height:1.6;padding-left:30px;}

        .cta-bottom{background:var(--primary);color:#fff;text-align:center;padding:64px 48px;border-radius:var(--radius-lg);margin:36px 0;position:relative;overflow:hidden;}
        .cta-bottom::before{content:'';position:absolute;top:-80px;right:-120px;width:400px;height:400px;background:radial-gradient(circle,rgba(255,255,255,0.04) 0%,transparent 70%);border-radius:50%;pointer-events:none;}
        .cta-bottom h2{font-size:2rem;font-weight:700;margin-bottom:10px;letter-spacing:-0.5px;position:relative;z-index:1;}
        .cta-bottom p{opacity:0.85;margin-bottom:24px;font-size:1rem;position:relative;z-index:1;}
        .cta-bottom .btn-group{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;position:relative;z-index:1;}

        .footer{background:var(--surface-light);text-align:center;padding:24px 0;color:var(--text-light);font-size:0.8rem;border-top:1px solid var(--border-light);letter-spacing:-0.1px;line-height:2;}
        .footer a{color:var(--text-muted);text-decoration:none;margin:0 10px;transition:color var(--transition);}
        .footer a:hover{color:var(--primary);}
        .footer .footer-links{margin-top:4px;}

        @media (max-width:1200px){
            .container{padding:0 36px;}
            .hero-grid{gap:28px;}
            .hero h1{font-size:2.4rem;}
            .section-title{font-size:1.8rem;}
            .grid-3{grid-template-columns:repeat(2,1fr);}
            .grid-4{grid-template-columns:repeat(2,1fr);}
            .hero-grid{grid-template-columns:1fr 1fr;}
            .flow-arrow-wrap{width:40px;}
            .flow-node{width:80px;}
        }
        @media (max-width:768px){
            .container{padding:0 20px;}
            .hero-grid,.grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
            .faq-list{grid-template-columns:1fr;}
            .hero h1{font-size:1.9rem;}
            .section-title{font-size:1.5rem;}
            .section{padding:52px 0;}
            .section-alt,.capability-dark{padding:52px 0;}
            .nav{display:none;}
            .hamburger{display:flex;}
            .header-container{flex-wrap:wrap;}
            .hero-stats{gap:18px;}
            .hero-stat .num{font-size:1.7rem;}
            .compare-table-wrap::after{display:block;}
            .flow-inline{flex-wrap:wrap;justify-content:center;gap:8px;}
            .flow-node{width:auto;}
            .flow-arrow-wrap{width:32px;height:30px;}
            .flow-node .icon-circle-white{width:42px;height:42px;font-size:0.95rem;}
            .hero-visual-dark{padding:28px 16px;}
        }