:root {
            --bg: #ffffff;
            --bg-soft: #f6f8fc;
            --ink: #0f172a;
            --ink-2: #475569;
            --ink-3: #94a3b8;
            --line: #e2e8f0;
            --brand: #4f7cff;
            --brand-2: #7c5cff;
            --brand-deep: #1d4ed8;
            --ok: #0ea5a4;
            --danger: #e11d48;
            --navy: #0b1220;
            --navy-2: #111c33;
            --radius: 8px;
            --shadow: 0 10px 30px rgba(15, 23, 42, .08);
            --shadow-lg: 0 20px 50px rgba(15, 23, 42, .14);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }

        html { scroll-behavior: smooth; }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                "Hiragino Sans GB", "Microsoft YaHei", Roboto, sans-serif;
            color: var(--ink);
            background: var(--bg);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        a { color: inherit; text-decoration: none; }
        img, svg { display: block; }

        .container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 22px;
            border-radius: var(--radius);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid transparent;
            cursor: pointer;
            transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
            white-space: nowrap;
        }
        .btn:hover { transform: translateY(-1px); }

        .btn-primary {
            color: #fff;
            background: linear-gradient(135deg, var(--brand), var(--brand-2));
            box-shadow: 0 8px 20px rgba(79, 124, 255, .35);
        }
        .btn-primary:hover { box-shadow: 0 12px 26px rgba(79, 124, 255, .45); }

        .btn-ghost {
            color: #fff;
            background: rgba(255, 255, 255, .08);
            border-color: rgba(255, 255, 255, .22);
        }
        .btn-ghost:hover { background: rgba(255, 255, 255, .14); }

        .btn-light {
            color: var(--brand-deep);
            background: #fff;
            box-shadow: 0 8px 20px rgba(2, 8, 23, .25);
        }

        .btn-outline {
            color: var(--brand);
            border-color: var(--brand);
            background: transparent;
        }
        .btn-outline:hover { background: rgba(79, 124, 255, .08); }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .3px;
        }

        /* ---------- Top Navigation ---------- */
        header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(11, 18, 32, .86);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-weight: 700;
            font-size: 17px;
            letter-spacing: .5px;
        }
        .brand-mark {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--brand), var(--brand-2));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
        }
        .brand-logo {
            width: 34px;
            height: 34px;
            object-fit: contain;
            border-radius: var(--radius);
            background: #fff;
            padding: 2px;
        }
        .brand small { display: block; font-size: 11px; font-weight: 400; color: var(--ink-3); letter-spacing: .8px; }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            color: #cbd5e1;
            font-size: 14px;
            font-weight: 500;
        }
        .nav-links a:hover { color: #fff; }

        .nav-actions { display: flex; align-items: center; gap: 12px; }

        .lang-switch {
            display: inline-flex;
            align-items: center;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .18);
            border-radius: 999px;
            padding: 3px;
            font-size: 12px;
            color: #94a3b8;
        }
        .lang-switch a {
            border: 0;
            background: transparent;
            color: inherit;
            font-size: 12px;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 999px;
            cursor: pointer;
            font-family: inherit;
            text-decoration: none;
            display: inline-block;
        }
        .lang-switch a.active { background: #fff; color: var(--navy); }

        .nav .btn { padding: 9px 18px; font-size: 14px; }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid rgba(255, 255, 255, .2);
            border-radius: var(--radius);
            color: #fff;
            padding: 8px;
            cursor: pointer;
            line-height: 0;
        }

        /* ---------- Hero ---------- */
        .hero {
            position: relative;
            color: #fff;
            background:
                radial-gradient(1000px 500px at 15% -10%, rgba(79, 124, 255, .35), transparent 60%),
                radial-gradient(900px 500px at 90% 10%, rgba(124, 92, 255, .28), transparent 55%),
                linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 70%, #0e1a33 100%);
            overflow: hidden;
        }
        .hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
            background-size: 44px 44px;
            mask-image: radial-gradient(700px 400px at 50% 0%, #000, transparent 75%);
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            padding: 96px 0 110px;
            text-align: center;
            max-width: 860px;
            margin: 0 auto;
        }

        .hero .badge {
            color: #dbe4ff;
            background: rgba(79, 124, 255, .16);
            border: 1px solid rgba(79, 124, 255, .4);
            margin-bottom: 24px;
        }

        .hero h1 {
            font-size: clamp(32px, 5vw, 52px);
            line-height: 1.2;
            letter-spacing: .5px;
            font-weight: 800;
        }
        .hero h1 .grad {
            background: linear-gradient(90deg, #7fb0ff, #b49bff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero p.sub {
            margin: 22px auto 34px;
            max-width: 640px;
            color: #a9b6d1;
            font-size: 17px;
        }

        .hero-cta { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

        .hero-stats {
            margin: 64px auto 0;
            max-width: 760px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .stat {
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius);
            padding: 18px 10px;
        }
        .stat b { display: block; font-size: 22px; color: #fff; }
        .stat span { font-size: 12px; color: #8ea0c0; }

        /* ---------- Sections ---------- */
        section { padding: 88px 0; }
        section.alt { background: var(--bg-soft); }

        .sec-head { text-align: center; max-width: 660px; margin: 0 auto 52px; }
        .sec-head .kicker {
            color: var(--brand);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1.5px;
            text-transform: uppercase;
        }
        .sec-head h2 { font-size: clamp(26px, 3.4vw, 36px); margin: 10px 0 12px; line-height: 1.25; }
        .sec-head p { color: var(--ink-2); font-size: 16px; }

        /* ---------- Feature Cards ---------- */
        .features {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .feature {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            transition: transform .18s ease, box-shadow .18s ease;
        }
        .feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .feature-icon {
            width: 46px;
            height: 46px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            margin-bottom: 18px;
        }
        .feature h3 { font-size: 17px; margin-bottom: 8px; }
        .feature p { font-size: 14px; color: var(--ink-2); }

        .f1 { background: linear-gradient(135deg, #4f7cff, #3b5bdb); }
        .f2 { background: linear-gradient(135deg, #0ea5a4, #0d9488); }
        .f3 { background: linear-gradient(135deg, #f59e0b, #d97706); }
        .f4 { background: linear-gradient(135deg, #7c5cff, #6d28d9); }
        .f5 { background: linear-gradient(135deg, #f43f5e, #e11d48); }
        .f6 { background: linear-gradient(135deg, #10b981, #059669); }

        /* ---------- How It Works ---------- */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
            counter-reset: step;
        }
        .step {
            position: relative;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 30px 22px 24px;
            box-shadow: var(--shadow);
        }
        .step::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -16px;
            left: 22px;
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--brand), var(--brand-2));
            color: #fff;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            box-shadow: 0 6px 14px rgba(79, 124, 255, .35);
        }
        .step h3 { font-size: 16px; margin: 10px 0 8px; }
        .step p { font-size: 14px; color: var(--ink-2); }

        .how-note {
            margin-top: 34px;
            text-align: center;
            font-size: 14px;
            color: var(--ink-2);
        }
        .how-note code {
            background: #eef2ff;
            border: 1px solid #e0e7ff;
            color: var(--brand-deep);
            border-radius: 6px;
            padding: 2px 8px;
            font-size: 13px;
            font-family: "Cascadia Code", Consolas, monospace;
        }

        /* ---------- FAQ ---------- */
        .faq-list { max-width: 760px; margin: 0 auto; }
        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
        }
        .faq-q {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            background: none;
            border: 0;
            padding: 18px 22px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
            cursor: pointer;
            font-family: inherit;
            text-align: left;
        }
        .faq-q .chev { transition: transform .2s ease; color: var(--ink-3); flex-shrink: 0; }
        .faq-item.open .chev { transform: rotate(180deg); }
        .faq-a { max-height: 0; overflow: hidden; transition: max-height .25s ease; }
        .faq-a-inner { padding: 0 22px 18px; font-size: 14px; color: var(--ink-2); }

        /* ---------- CTA Band ---------- */
        .cta-band {
            padding: 74px 0;
            background:
                radial-gradient(800px 360px at 50% -30%, rgba(79, 124, 255, .4), transparent 65%),
                linear-gradient(150deg, var(--navy), var(--navy-2));
            color: #fff;
            text-align: center;
        }
        .cta-band h2 { font-size: clamp(24px, 3vw, 32px); }
        .cta-band p { color: #a9b6d1; margin: 12px auto 30px; max-width: 520px; }
        .cta-band .hero-cta { justify-content: center; }

        /* ---------- Footer ---------- */
        footer {
            background: #070d18;
            color: #64748b;
            padding: 40px 0;
            font-size: 13px;
        }
        .footer-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-inner .brand { color: #e2e8f0; }
        .footer-links { display: flex; gap: 22px; }
        .footer-links a:hover { color: #fff; }

        /* ---------- Responsive ---------- */
        @media (max-width: 900px) {
            .features { grid-template-columns: repeat(2, 1fr); }
            .steps { grid-template-columns: repeat(2, 1fr); }
            .hero-stats { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 720px) {
            .nav-toggle { display: inline-flex; }
            .nav-links, .nav-actions .btn { display: none; }
            .nav-actions { gap: 8px; }
            .nav { gap: 10px; }
            .brand { min-width: 0; }
            .brand > span { min-width: 0; overflow: hidden; }
            .brand > span > span,
            .brand small {
                display: block;
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
            }
            .lang-switch a { padding: 5px 9px; }
            .nav.open .nav-links {
                display: flex;
                flex-direction: column;
                align-items: flex-start;
                gap: 18px;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--navy-2);
                border-bottom: 1px solid rgba(255, 255, 255, .1);
                padding: 22px 24px;
            }
            section { padding: 64px 0; }
        }

        @media (max-width: 520px) {
            .features, .steps, .hero-stats { grid-template-columns: 1fr; }
            .nav { height: 60px; }
            .brand { font-size: 15px; gap: 8px; }
            .brand-logo { width: 30px; height: 30px; }
            .brand small { font-size: 10px; letter-spacing: .4px; }
        }