*{margin:0;padding:0;box-sizing:border-box}
        :root{
            --green-50:#E8F5E9;--green-100:#C8E6C9;--green-200:#A5D6A7;
            --green-400:#66BB6A;--green-500:#4CAF50;--green-600:#43A047;
            --green-700:#388E3C;--green-800:#2E7D32;--green-900:#1B5E20;
            --blue-50:#E3F2FD;--blue-100:#BBDEFB;--blue-500:#2196F3;
            --amber-50:#FFF8E1;--amber-500:#FFC107;
            --gray-50:#FAFBFC;--gray-100:#F4F5F7;--gray-200:#E8EAED;
            --gray-300:#D1D5DB;--gray-400:#9CA3AF;--gray-500:#6B7280;
            --gray-600:#4B5563;--gray-700:#374151;--gray-800:#1F2937;
            --gray-900:#111827;
            --shadow-sm:0 1px 2px rgba(0,0,0,0.04);
            --shadow-md:0 4px 16px rgba(0,0,0,0.06);
            --shadow-lg:0 12px 40px rgba(0,0,0,0.08);
            --shadow-xl:0 20px 60px rgba(0,0,0,0.10);
            --shadow-green:0 8px 30px rgba(76,175,80,0.25);
        }
        body{
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
            background:#FAFBFC;color:var(--gray-800);line-height:1.6;
            -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden;
        }
        a{text-decoration:none;color:inherit}
        img{display:block;max-width:100%}

        /* ===== NAV ===== */
        .nav{
            position:fixed;top:0;left:0;right:0;z-index:100;
            height:64px;display:flex;align-items:center;justify-content:center;
            padding:0 48px;
            background:rgba(255,255,255,0.82);backdrop-filter:blur(20px) saturate(180%);
            border-bottom:1px solid rgba(0,0,0,0.06);
        }
        .nav-inner{
            width:100%;max-width:1200px;
            display:flex;align-items:center;justify-content:space-between;
        }
        .nav-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--gray-900)}
        .nav-logo svg{width:32px;height:32px}
        .nav-logo em{font-style:normal;color:var(--green-600)}
        .nav-links{display:flex;gap:32px}
        .nav-links a{font-size:14px;font-weight:500;color:var(--gray-500);transition:color .2s}
        .nav-links a:hover{color:var(--green-600)}

        /* ===== HERO ===== */
        .hero{
            min-height:100vh;display:flex;align-items:center;justify-content:center;
            padding:100px 48px 80px;position:relative;overflow:hidden;
            background:linear-gradient(165deg,#FFFFFF 0%,#F0FDF4 40%,#ECFDF5 70%,#F0F9FF 100%);
        }
        .hero::before{
            content:'';position:absolute;top:-200px;right:-200px;
            width:700px;height:700px;border-radius:50%;
            background:radial-gradient(circle,rgba(76,175,80,0.07) 0%,transparent 70%);
            pointer-events:none;
        }
        .hero::after{
            content:'';position:absolute;bottom:-150px;left:-150px;
            width:500px;height:500px;border-radius:50%;
            background:radial-gradient(circle,rgba(33,150,243,0.05) 0%,transparent 70%);
            pointer-events:none;
        }
        .hero-inner{
            max-width:1200px;width:100%;display:grid;
            grid-template-columns:1fr 1fr;gap:64px;align-items:center;position:relative;z-index:1;
        }
        .hero-text{max-width:520px}
        .hero-badge{
            display:inline-flex;align-items:center;gap:6px;
            background:var(--green-50);border:1px solid var(--green-200);
            color:var(--green-800);padding:6px 14px;border-radius:100px;
            font-size:12px;font-weight:600;letter-spacing:.3px;margin-bottom:24px;
        }
        .hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--green-500);animation:blink 2s infinite}
        @keyframes blink{0%,100%{opacity:1}50%{opacity:.3}}
        .hero-text h1{
            font-size:48px;font-weight:900;line-height:1.1;letter-spacing:-1.5px;
            color:var(--gray-900);margin-bottom:20px;
        }
        .hero-text h1 span{
            background:linear-gradient(135deg,var(--green-600),var(--green-800));
            -webkit-background-clip:text;-webkit-text-fill-color:transparent;
            background-clip:text;
        }
        .hero-text p{
            font-size:17px;color:var(--gray-500);line-height:1.7;margin-bottom:36px;max-width:440px;
        }
        .hero-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
        .btn{
            display:inline-flex;align-items:center;gap:8px;
            padding:14px 32px;border-radius:14px;font-size:15px;font-weight:600;
            border:none;cursor:pointer;transition:all .25s cubic-bezier(.4,0,.2,1);
        }
        .btn-green{
            background:linear-gradient(135deg,var(--green-500),var(--green-600));
            color:#fff;box-shadow:var(--shadow-green);
        }
        .btn-green:hover{transform:translateY(-2px);box-shadow:0 12px 36px rgba(76,175,80,0.35)}
        .btn-green:active{transform:translateY(0)}
        .btn-green svg{width:18px;height:18px}
        .btn-outline{
            background:#fff;color:var(--gray-700);
            border:1.5px solid var(--gray-200);box-shadow:var(--shadow-sm);
        }
        .btn-outline:hover{border-color:var(--green-300);color:var(--green-700);background:var(--green-50)}
        .hero-meta{margin-top:24px;display:flex;gap:24px;flex-wrap:wrap}
        .hero-meta-item{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--gray-400)}
        .hero-meta-item svg{width:14px;height:14px;color:var(--gray-300)}

        .hero-visual{position:relative}
        .screenshot-wrap{
            position:relative;border-radius:20px;overflow:hidden;
            box-shadow:var(--shadow-xl),0 0 0 1px rgba(0,0,0,0.04);
            background:#fff;
        }
        .screenshot-wrap img{
            width:100%;height:auto;display:block;border-radius:20px;
        }
        .screenshot-bar{
            position:absolute;top:0;left:0;right:0;height:40px;
            background:rgba(255,255,255,0.9);backdrop-filter:blur(10px);
            display:flex;align-items:center;padding:0 16px;gap:8px;
            border-bottom:1px solid rgba(0,0,0,0.06);border-radius:20px 20px 0 0;z-index:2;
        }
        .screenshot-dot{width:12px;height:12px;border-radius:50%}
        .screenshot-dot.r{background:#FF5F57}.screenshot-dot.y{background:#FEBC2E}.screenshot-dot.g{background:#28C840}
        .screenshot-bar span{
            margin-left:auto;font-size:12px;color:var(--gray-400);font-weight:500;
            background:var(--gray-100);padding:2px 12px;border-radius:6px;
        }
        .float-tag{
            position:absolute;z-index:3;
            background:rgba(255,255,255,0.95);backdrop-filter:blur(12px);
            border:1px solid rgba(0,0,0,0.06);border-radius:12px;
            padding:10px 16px;display:flex;align-items:center;gap:8px;
            box-shadow:var(--shadow-lg);font-size:13px;font-weight:600;color:var(--gray-700);
            animation:floatY 4s ease-in-out infinite;
        }
        .float-tag .icon-circle{
            width:28px;height:28px;border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0;
        }
        .float-tag .icon-circle.green{background:var(--green-50);color:var(--green-600)}
        .float-tag .icon-circle.blue{background:var(--blue-50);color:var(--blue-500)}
        .float-tag .icon-circle.amber{background:var(--amber-50);color:var(--amber-500)}
        .float-tag svg{width:16px;height:16px}
        .float-tag.t1{bottom:-16px;left:-30px;animation-delay:0s}
        .float-tag.t2{top:60px;right:-40px;animation-delay:1.3s}
        .float-tag.t3{bottom:80px;right:-24px;animation-delay:2.6s}
        @keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

        /* ===== STATS BAR ===== */
        .stats{
            background:#fff;border-top:1px solid var(--gray-100);border-bottom:1px solid var(--gray-100);
            padding:32px 48px;
        }
        .stats-inner{
            max-width:1200px;margin:0 auto;
            display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
        }
        .stat{text-align:center}
        .stat-num{font-size:32px;font-weight:800;color:var(--green-700);letter-spacing:-1px}
        .stat-num span{font-size:16px;font-weight:600;color:var(--green-400);margin-left:2px}
        .stat-label{font-size:13px;color:var(--gray-400);margin-top:4px;font-weight:500}

        /* ===== FEATURES ===== */
        .features{padding:100px 48px;background:var(--gray-50)}
        .section-head{text-align:center;max-width:560px;margin:0 auto 60px}
        .section-head h2{font-size:36px;font-weight:800;color:var(--gray-900);letter-spacing:-1px;margin-bottom:14px}
        .section-head p{font-size:16px;color:var(--gray-400);line-height:1.7}
        .features-grid{
            max-width:1200px;margin:0 auto;
            display:grid;grid-template-columns:repeat(2,1fr);gap:20px;
        }
        .feat-card{
            background:#fff;border-radius:20px;padding:36px;
            border:1px solid var(--gray-100);
            transition:all .3s cubic-bezier(.4,0,.2,1);
            display:flex;gap:24px;align-items:flex-start;
        }
        .feat-card:hover{
            border-color:var(--green-200);
            box-shadow:0 12px 40px rgba(76,175,80,0.08);
            transform:translateY(-4px);
        }
        .feat-icon{
            width:52px;height:52px;border-radius:14px;flex-shrink:0;
            display:flex;align-items:center;justify-content:center;
        }
        .feat-icon svg{width:26px;height:26px}
        .feat-icon.g1{background:linear-gradient(135deg,#E8F5E9,#C8E6C9);color:var(--green-700)}
        .feat-icon.g2{background:linear-gradient(135deg,#E3F2FD,#BBDEFB);color:var(--blue-500)}
        .feat-icon.g3{background:linear-gradient(135deg,#FFF8E1,#FFECB3);color:#F57F17}
        .feat-icon.g4{background:linear-gradient(135deg,#F3E5F5,#E1BEE7);color:#7B1FA2}
        .feat-body h3{font-size:17px;font-weight:700;color:var(--gray-800);margin-bottom:8px}
        .feat-body p{font-size:14px;color:var(--gray-400);line-height:1.7}
        .feat-body .tag{
            display:inline-block;margin-top:12px;padding:4px 10px;border-radius:6px;
            font-size:11px;font-weight:600;background:var(--green-50);color:var(--green-700);
        }

        /* ===== SHOWCASE ===== */
        .showcase{padding:100px 48px;background:#fff}
        .showcase-inner{
            max-width:1100px;margin:0 auto;display:grid;
            grid-template-columns:320px 1fr;gap:48px;align-items:start;
        }
        .showcase-content h2{font-size:32px;font-weight:800;color:var(--gray-900);letter-spacing:-.8px;margin-bottom:14px}
        .showcase-content>p{font-size:15px;color:var(--gray-400);line-height:1.7;margin-bottom:28px}
        .step-tabs{display:flex;flex-direction:column;gap:12px}
        .step-tab{
            display:flex;align-items:flex-start;gap:14px;
            padding:20px;border-radius:16px;cursor:pointer;
            border:1.5px solid var(--gray-100);background:var(--gray-50);
            transition:all .3s cubic-bezier(.4,0,.2,1);
            user-select:none;
        }
        .step-tab:hover{border-color:var(--green-200);background:#fff;box-shadow:var(--shadow-sm)}
        .step-tab.active{border-color:var(--green-400);background:#fff;box-shadow:0 4px 20px rgba(76,175,80,0.10)}
        .step-tab-num{
            width:36px;height:36px;border-radius:10px;flex-shrink:0;
            background:var(--gray-200);color:var(--gray-400);
            display:flex;align-items:center;justify-content:center;
            font-size:15px;font-weight:700;transition:all .3s;
        }
        .step-tab.active .step-tab-num{background:var(--green-500);color:#fff;box-shadow:0 4px 12px rgba(76,175,80,0.3)}
        .step-tab-body h4{font-size:15px;font-weight:700;color:var(--gray-700);margin-bottom:3px;transition:color .3s}
        .step-tab.active .step-tab-body h4{color:var(--green-800)}
        .step-tab-body p{font-size:13px;color:var(--gray-400);line-height:1.5}
        .step-tab.active .step-tab-body p{color:var(--gray-500)}
        .showcase-viewport{
            position:relative;border-radius:20px;overflow:hidden;
            background:var(--gray-100);
            box-shadow:var(--shadow-lg),0 0 0 1px rgba(0,0,0,0.03);
        }
        .showcase-viewport img{
            width:100%;height:auto;display:block;
            opacity:0;transform:scale(1.02);
            transition:opacity .4s ease,transform .4s ease;
            position:absolute;top:0;left:0;
        }
        .showcase-viewport img.visible{opacity:1;transform:scale(1);position:relative}
        .viewport-bar{
            position:absolute;top:0;left:0;right:0;height:36px;z-index:2;
            background:rgba(255,255,255,0.92);backdrop-filter:blur(8px);
            display:flex;align-items:center;padding:0 14px;gap:7px;
            border-bottom:1px solid rgba(0,0,0,0.05);
        }
        .viewport-dot{width:10px;height:10px;border-radius:50%}
        .viewport-dot.r{background:#FF5F57}.viewport-dot.y{background:#FEBC2E}.viewport-dot.g{background:#28C840}
        .viewport-bar span{
            margin-left:auto;font-size:11px;color:var(--gray-400);font-weight:500;
            background:var(--gray-100);padding:2px 10px;border-radius:5px;
        }
        .viewport-dots{
            position:absolute;bottom:16px;left:50%;transform:translateX(-50%);
            display:flex;gap:8px;z-index:3;
        }
        .viewport-dot-indicator{
            width:8px;height:8px;border-radius:50%;
            background:rgba(255,255,255,0.5);transition:all .3s;cursor:pointer;
        }
        .viewport-dot-indicator.active{
            background:#fff;width:24px;border-radius:4px;
            box-shadow:0 2px 8px rgba(0,0,0,0.2);
        }

        /* ===== SCENARIOS ===== */
        .scenarios{padding:100px 48px;background:var(--gray-50)}
        .scenarios-grid{
            max-width:1200px;margin:0 auto;
            display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
        }
        .scen-card{
            background:#fff;border-radius:16px;padding:28px 24px;text-align:center;
            border:1px solid var(--gray-100);transition:all .3s;
            position:relative;overflow:hidden;
        }
        .scen-card::before{
            content:'';position:absolute;top:0;left:0;right:0;height:3px;
            background:linear-gradient(90deg,var(--green-400),var(--green-600));
            transform:scaleX(0);transition:transform .3s;transform-origin:left;
        }
        .scen-card:hover::before{transform:scaleX(1)}
        .scen-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
        .scen-icon{
            width:56px;height:56px;border-radius:16px;margin:0 auto 16px;
            display:flex;align-items:center;justify-content:center;
            background:var(--green-50);color:var(--green-600);
        }
        .scen-icon svg{width:28px;height:28px}
        .scen-card h3{font-size:15px;font-weight:700;color:var(--gray-800);margin-bottom:8px}
        .scen-card p{font-size:13px;color:var(--gray-400);line-height:1.6}

        /* ===== CTA ===== */
        .cta{
            padding:80px 48px;background:linear-gradient(135deg,var(--green-700),var(--green-900));
            text-align:center;position:relative;overflow:hidden;
        }
        .cta::before{
            content:'';position:absolute;top:-100px;right:-100px;
            width:400px;height:400px;border-radius:50%;
            background:rgba(255,255,255,0.04);pointer-events:none;
        }
        .cta h2{font-size:36px;font-weight:800;color:#fff;letter-spacing:-1px;margin-bottom:14px;position:relative}
        .cta p{font-size:16px;color:rgba(255,255,255,0.7);margin-bottom:36px;position:relative}
        .btn-white{
            display:inline-flex;align-items:center;gap:8px;
            padding:16px 40px;border-radius:14px;font-size:16px;font-weight:700;
            background:#fff;color:var(--green-700);border:none;cursor:pointer;
            box-shadow:0 8px 24px rgba(0,0,0,0.15);transition:all .25s;position:relative;
        }
        .btn-white:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(0,0,0,0.2)}
        .btn-white svg{width:20px;height:20px}

        /* ===== FOOTER ===== */
        footer{
            padding:48px 48px;background:var(--gray-900);text-align:center;
        }
        .footer-text{
            max-width:640px;margin:0 auto;
            font-size:13px;color:var(--gray-500);line-height:1.8;
        }

        /* ===== RESPONSIVE ===== */
        @media(max-width:1024px){
            .hero-inner{grid-template-columns:1fr;gap:48px;text-align:center}
            .hero-text{max-width:100%;display:flex;flex-direction:column;align-items:center}
            .hero-text p{max-width:520px}
            .hero-actions{justify-content:center}
            .hero-meta{justify-content:center}
            .hero-visual{max-width:580px;margin:0 auto;width:100%}
            .float-tag.t2{right:0}
            .float-tag.t3{right:0}
            .features-grid{grid-template-columns:1fr}
            .showcase-inner{grid-template-columns:1fr;gap:32px}
            .scenarios-grid{grid-template-columns:repeat(2,1fr)}
            .stats-inner{grid-template-columns:repeat(2,1fr)}
        }
        @media(max-width:640px){
            .nav{padding:0 20px}
            .nav-links{display:none}
            .hero{padding:90px 20px 60px}
            .hero-text h1{font-size:32px}
            .features,.showcase,.scenarios,.stats{padding:60px 20px}
            .showcase-inner{grid-template-columns:1fr}
            .scenarios-grid{grid-template-columns:1fr}
            .stats-inner{grid-template-columns:1fr 1fr}
            footer{padding:32px 20px}
            .float-tag{display:none}
            .feat-card{flex-direction:column;gap:16px}
        }