:root{
            --brand-primary:#2563EB;
            --brand-primary-hover:#1D4ED8;
            --brand-cyan:#06B6D4;
            --brand-violet:#7C3AED;
            --brand-deep:#0B1220;
            --brand-navy:#0F2A4A;
            --bg-page:#F8FAFC;
            --bg-card:#FFFFFF;
            --bg-muted:#F1F5F9;
            --border:#E2E8F0;
            --text-primary:#0F172A;
            --text-secondary:#475569;
            --text-muted:#64748B;
            --success:#10B981;
            --warning:#F59E0B;
            --danger:#EF4444;
            --info:#0EA5E9;
            --radius-btn:12px;
            --radius-card:16px;
            --radius-section:24px;
            --shadow-card:0 8px 24px rgba(15,23,42,.08);
            --shadow-hover:0 16px 40px rgba(15,23,42,.14);
            --container:1200px;
            --header-h:72px;
        }

        *,*::before,*::after{box-sizing:border-box}
        html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:96px}
        body{
            margin:0;
            font-family:"Inter","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
            font-size:16px;
            line-height:1.75;
            color:var(--text-primary);
            background:var(--bg-page);
            -webkit-font-smoothing:antialiased;
        }
        h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.01em}
        p{margin:0}
        ul,ol{margin:0;padding:0;list-style:none}
        img{max-width:100%;display:block}
        a{color:var(--brand-primary);text-decoration:none;transition:color .2s}
        a:hover{color:var(--brand-primary-hover)}
        button{font-family:inherit}
        :focus-visible{outline:2px solid var(--brand-primary);outline-offset:3px;border-radius:6px}

        .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
        .section{padding:96px 0}
        .section--muted{background:var(--bg-card)}
        .section--soft{background:var(--bg-muted)}

        .btn{
            display:inline-flex;align-items:center;justify-content:center;gap:10px;
            height:52px;padding:0 28px;border:1px solid transparent;border-radius:var(--radius-btn);
            font-size:16px;font-weight:600;line-height:1;cursor:pointer;white-space:nowrap;
            transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
        }
        .btn i{font-size:15px}
        .btn-primary{background:var(--brand-primary);color:#fff;box-shadow:0 6px 18px rgba(37,99,235,.24)}
        .btn-primary:hover{background:var(--brand-primary-hover);color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,99,235,.32)}
        .btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.28)}
        .btn-ghost:hover{background:rgba(255,255,255,.18);color:#fff;transform:translateY(-2px)}
        .btn-outline{background:#fff;color:var(--brand-primary);border-color:var(--brand-primary)}
        .btn-outline:hover{background:#EFF6FF;color:var(--brand-primary-hover);transform:translateY(-2px)}
        .btn-sm{height:44px;padding:0 20px;font-size:14px}
        .btn-block{width:100%}

        .section-head{max-width:760px;margin:0 auto 56px;text-align:center}
        .eyebrow{
            display:inline-flex;align-items:center;gap:8px;
            padding:6px 14px;margin-bottom:18px;border-radius:999px;
            background:#EFF6FF;color:var(--brand-primary);
            font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;
        }
        .h2{font-size:clamp(26px,3.2vw,36px);color:var(--text-primary)}
        .section-sub{margin-top:16px;font-size:17px;color:var(--text-secondary)}

        .site-header{
            position:fixed;inset:0 0 auto 0;z-index:100;height:var(--header-h);
            transition:background .28s ease,box-shadow .28s ease,border-color .28s ease;
            border-bottom:1px solid transparent;
        }
        .header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;gap:24px}
        .brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:700;color:#fff;letter-spacing:.01em}
        .brand:hover{color:#fff}
        .brand-mark{
            width:34px;height:34px;border-radius:8px;object-fit:contain;
            background:rgba(255,255,255,.12);
            box-shadow:0 6px 16px rgba(6,182,212,.28);
        }
        .nav{display:flex;align-items:center;gap:4px}
        .nav a{
            display:inline-block;padding:8px 14px;border-radius:10px;
            color:rgba(255,255,255,.82);font-size:15px;font-weight:500;transition:.2s;
        }
        .nav a:hover{color:#fff;background:rgba(255,255,255,.1)}
        .header-actions{display:flex;align-items:center;gap:12px}
        .header-actions .btn-sm{box-shadow:0 6px 16px rgba(37,99,235,.35)}
        .nav-toggle{
            display:none;width:44px;height:44px;border-radius:12px;border:1px solid rgba(255,255,255,.24);
            background:rgba(255,255,255,.08);color:#fff;font-size:18px;cursor:pointer;
        }
        .site-header.scrolled{
            background:rgba(255,255,255,.94);backdrop-filter:saturate(180%) blur(12px);
            border-bottom-color:var(--border);box-shadow:0 4px 20px rgba(15,23,42,.06);
        }
        .site-header.scrolled .brand{color:var(--text-primary)}
        .site-header.scrolled .nav a{color:var(--text-secondary)}
        .site-header.scrolled .nav a:hover{color:var(--brand-primary);background:#EFF6FF}
        .site-header.scrolled .nav-toggle{color:var(--text-primary);border-color:var(--border);background:#fff}
        .site-header.scrolled .brand-mark{background:rgba(37,99,235,.08)}

        .faq-item{
            background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-card);
            margin-bottom:14px;overflow:hidden;transition:border-color .2s,box-shadow .2s;
        }
        .faq-item[open]{border-color:#BFDBFE;box-shadow:var(--shadow-card)}
        .faq-item summary{
            display:flex;align-items:center;justify-content:space-between;gap:16px;
            padding:20px 24px;cursor:pointer;list-style:none;
            font-size:16px;font-weight:600;color:var(--text-primary);
        }
        .faq-item summary::-webkit-details-marker{display:none}
        .faq-icon{
            flex:0 0 auto;width:26px;height:26px;display:grid;place-items:center;
            border-radius:50%;background:#EFF6FF;color:var(--brand-primary);
            font-size:12px;transition:transform .25s ease,background .25s;
        }
        .faq-item[open] .faq-icon{transform:rotate(180deg);background:var(--brand-primary);color:#fff}
        .faq-a{padding:0 24px 22px;color:var(--text-secondary);font-size:15px;line-height:1.8}

        .support-fab{
            position:fixed;right:24px;bottom:24px;z-index:90;
            display:inline-flex;align-items:center;gap:10px;height:54px;padding:0 20px;
            border-radius:999px;background:var(--brand-deep);color:#fff;font-size:15px;font-weight:600;
            box-shadow:0 12px 32px rgba(11,18,32,.32);transition:.2s;
        }
        .support-fab:hover{color:#fff;transform:translateY(-2px);box-shadow:0 16px 40px rgba(11,18,32,.4)}
        .support-fab .dot{width:9px;height:9px;border-radius:50%;background:var(--success);box-shadow:0 0 0 4px rgba(16,185,129,.22)}

        .site-footer{background:var(--brand-deep);color:rgba(255,255,255,.68);padding:72px 0 32px;font-size:14px}
        .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:48px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.1)}
        .footer-brand .brand{color:#fff;margin-bottom:16px}
        .footer-brand p{max-width:320px;color:rgba(255,255,255,.6);line-height:1.9}
        .footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.04em}
        .footer-col li{margin-bottom:11px}
        .footer-col a{color:rgba(255,255,255,.66)}
        .footer-col a:hover{color:#fff}
        .footer-bottom{padding-top:28px;display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;color:rgba(255,255,255,.45);font-size:13px}
        .footer-bottom p{max-width:720px}

        @media (max-width:1024px){
            .nav{display:none}
            .nav-toggle{display:grid;place-items:center}
            .header-actions .btn-sm{display:none}
            .nav.open{
                display:flex;flex-direction:column;align-items:stretch;gap:4px;
                position:absolute;top:var(--header-h);left:16px;right:16px;
                background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
                padding:12px;box-shadow:var(--shadow-hover);
            }
            .nav.open a{color:var(--text-secondary);padding:12px 16px}
            .nav.open a:hover{background:#EFF6FF;color:var(--brand-primary)}
        }
        @media (max-width:768px){
            .section{padding:64px 0}
            .section-head{margin-bottom:40px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
            .footer-brand{grid-column:1/-1}
            .support-fab{right:16px;bottom:16px;height:48px;padding:0 16px;font-size:14px}
        }
        @media (max-width:480px){
            .footer-grid{grid-template-columns:1fr}
            .btn{height:50px;padding:0 22px;font-size:15px}
        }
        @media (prefers-reduced-motion:reduce){
            *{animation:none !important;transition:none !important}
            html{scroll-behavior:auto}
        }

.page-pricing .hero-pricing{
            position:relative;overflow:hidden;
            padding:calc(var(--header-h) + 72px) 0 64px;
            background:
                radial-gradient(900px 520px at 82% 8%,rgba(6,182,212,.24),transparent 62%),
                linear-gradient(135deg,#0B1220 0%,#0F2A4A 60%,#1E3A8A 100%);
            color:#fff;text-align:center;
        }
        .page-pricing .hero-pricing::after{
            content:"";position:absolute;inset:0;pointer-events:none;
            background-image:radial-gradient(rgba(255,255,255,.1) 1px,transparent 1px);
            background-size:32px 32px;opacity:.4;
        }
        .page-pricing .hero-pricing .container{position:relative;z-index:1}
        .page-pricing .hero-pricing h1{font-size:clamp(32px,4.2vw,48px);letter-spacing:-.02em;margin-bottom:20px}
        .page-pricing .hero-pricing .hero-sub{max-width:780px;margin:0 auto;font-size:17px;color:rgba(255,255,255,.8);line-height:1.8}
        .page-pricing .hero-pricing .hero-note{
            display:inline-flex;align-items:center;gap:8px;margin-top:24px;
            padding:8px 18px;border-radius:999px;background:rgba(16,185,129,.15);
            border:1px solid rgba(16,185,129,.3);color:#34D399;font-size:14px;font-weight:500;
        }

        .page-pricing .pricing-section{margin-top:-40px;position:relative;z-index:10;padding-bottom:64px}
        .page-pricing .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
        .page-pricing .price-card{
            position:relative;display:flex;flex-direction:column;padding:40px 32px;
            border-radius:var(--radius-section);background:var(--bg-card);
            border:1px solid var(--border);box-shadow:0 10px 30px rgba(0,0,0,.05);
            transition:transform .2s,box-shadow .2s;
        }
        .page-pricing .price-card:hover{transform:translateY(-4px);box-shadow:0 20px 48px rgba(0,0,0,.08)}
        .page-pricing .price-card.featured{
            border:2px solid var(--brand-primary);
            box-shadow:0 24px 60px rgba(37,99,235,.15);
            background:linear-gradient(170deg,#FFFFFF,#F5F9FF);
        }
        .page-pricing .price-tag{
            position:absolute;top:-14px;left:50%;transform:translateX(-50%);
            padding:6px 18px;border-radius:999px;background:var(--brand-violet);color:#fff;
            font-size:13px;font-weight:700;letter-spacing:.05em;white-space:nowrap;
            box-shadow:0 4px 12px rgba(124,58,237,.3);
        }
        .page-pricing .price-card h3{font-size:20px;margin-bottom:8px;color:var(--text-primary)}
        .page-pricing .price-card .desc{font-size:14px;color:var(--text-muted);margin-bottom:24px}
        .page-pricing .price-amount{display:flex;align-items:baseline;gap:6px;margin-bottom:8px}
        .page-pricing .price-amount .cur{font-size:20px;font-weight:600;color:var(--text-secondary)}
        .page-pricing .price-amount .num{font-size:48px;font-weight:800;line-height:1;letter-spacing:-.03em;color:var(--text-primary);font-variant-numeric:tabular-nums}
        .page-pricing .price-amount .unit{font-size:15px;color:var(--text-muted)}
        .page-pricing .price-hint{font-size:13px;color:var(--text-muted);margin-bottom:32px;padding-bottom:24px;border-bottom:1px dashed var(--border)}
        .page-pricing .price-features{display:flex;flex-direction:column;gap:16px;margin-bottom:36px;flex-grow:1}
        .page-pricing .price-features li{display:flex;align-items:flex-start;gap:12px;font-size:15px;color:var(--text-secondary);line-height:1.5}
        .page-pricing .price-features i{color:var(--success);font-size:14px;margin-top:3px;flex:0 0 auto}
        .page-pricing .price-card .btn{margin-top:auto}
        
        .page-pricing .device-support{
            margin-top:20px;padding-top:20px;border-top:1px solid var(--border);
            display:flex;align-items:center;justify-content:center;gap:16px;color:var(--text-muted);
        }
        .page-pricing .device-support span{font-size:13px}
        .page-pricing .device-support i{font-size:16px;color:var(--text-primary)}

        .page-pricing .table-wrap{
            width: 100%;
            margin:0 auto;border:1px solid var(--border);
            border-radius:var(--radius-card);background:var(--bg-card);overflow:hidden;
        }
        .page-pricing .compare-table{
            width:100%;border-collapse:collapse;font-size:15px;text-align:center;
            table-layout: fixed;
        }
        .page-pricing .compare-table th,
        .page-pricing .compare-table td{
            padding:18px 20px;border-bottom:1px solid var(--border);
        }
        .page-pricing .compare-table thead th{
            background:var(--bg-muted);font-weight:700;color:var(--text-primary);
        }
        .page-pricing .compare-table thead th:nth-child(2){color:var(--brand-primary)}
        .page-pricing .compare-table tbody th{
            text-align:left;font-weight:600;color:var(--text-secondary);background:var(--bg-card);
        }
        .page-pricing .compare-table tbody tr:last-child th,
        .page-pricing .compare-table tbody tr:last-child td{border-bottom:none}
        .page-pricing .compare-table tbody td:nth-child(2){
            background:#F8FBFF;color:var(--brand-primary);font-weight:600;
        }
        
        .page-pricing .transparency-grid{
            display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
            width: 100%;margin:0 auto;
        }
        .page-pricing .trans-card{
            padding:32px;border-radius:var(--radius-card);background:var(--bg-card);
            border:1px solid var(--border);text-align:center;
        }
        .page-pricing .trans-icon{
            width:56px;height:56px;display:grid;place-items:center;margin:0 auto 20px;
            border-radius:50%;background:#EFF6FF;color:var(--brand-primary);font-size:22px;
        }
        .page-pricing .trans-card h3{font-size:18px;margin-bottom:12px}
        .page-pricing .trans-card p{font-size:14.5px;color:var(--text-secondary);line-height:1.7}

        .page-pricing .faq-wrap{
            display:grid;grid-template-columns:1fr 1fr;gap:0 24px;
            width: 100%;margin:0 auto;
        }
        .page-pricing .faq-cta{text-align:center;margin-top:40px}

        .page-pricing .final-cta{
            position:relative;overflow:hidden;color:#fff;text-align:center;padding:80px 0;
            background:linear-gradient(120deg,#1D4ED8 0%,#2563EB 45%,#0891B2 100%);
        }
        .page-pricing .final-cta::before{
            content:"";position:absolute;inset:0;
            background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
            background-size:28px 28px;opacity:.55;
        }
        .page-pricing .final-cta .container{position:relative;z-index:1}
        .page-pricing .final-cta h2{font-size:clamp(28px,3.6vw,36px);color:#fff}
        .page-pricing .final-cta p{max-width:640px;margin:16px auto 0;font-size:16px;color:rgba(255,255,255,.84)}
        .page-pricing .final-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:32px}
        .page-pricing .final-actions .btn-primary{background:#fff;color:var(--brand-primary);box-shadow:0 12px 32px rgba(2,6,23,.24)}
        .page-pricing .final-actions .btn-primary:hover{background:#F1F5F9;color:var(--brand-primary-hover)}

        @media (max-width:900px){
            .page-pricing .price-grid{grid-template-columns:1fr;gap:32px}
            .page-pricing .price-card.featured{transform:none}
            .page-pricing .transparency-grid{grid-template-columns:1fr}
            .page-pricing .faq-wrap{grid-template-columns:1fr}
            .page-pricing .table-wrap{overflow-x:auto;border-radius:0;border-left:none;border-right:none}
            .page-pricing .compare-table{min-width:600px;}
        }