/* roulang page: index */
:root {
            --bg-primary: #0D0F14;
            --bg-secondary: #1A1D26;
            --bg-tertiary: #2A2E38;
            --accent-primary: #00E5A0;
            --accent-secondary: #FF5C35;
            --text-primary: #F4F4F6;
            --text-secondary: #B0B3BD;
            --text-muted: #6B6F7B;
            --border-color: rgba(255,255,255,0.06);
            --border-accent: rgba(0,229,160,0.3);
            --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
            --shadow-hover: 0 8px 40px rgba(0,229,160,0.15);
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-sm: 6px;
            --font-title: 'Inter','PingFang SC','Microsoft YaHei',sans-serif;
            --font-body: 'Inter','PingFang SC','Microsoft YaHei',sans-serif;
            --font-mono: 'SF Mono','Inter',monospace;
            --transition-base: all 0.25s cubic-bezier(0.4,0,0.2,1);
            --max-width: 1280px;
            --nav-height: 72px;
            --nav-height-mobile: 56px;
        }
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth;scroll-padding-top:var(--nav-height)}
        body{font-family:var(--font-body);font-size:16px;line-height:1.7;color:var(--text-secondary);background:var(--bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}
        a{text-decoration:none;color:inherit;transition:var(--transition-base)}
        img{max-width:100%;height:auto;display:block}
        button,input{cursor:pointer;border:none;outline:none;font-family:inherit}
        ul,ol{list-style:none}
        .container{max-width:var(--max-width);margin:0 auto;padding:0 24px}
        @media(max-width:767px){.container{padding:0 16px}}
        h1,h2,h3,h4{font-family:var(--font-title);color:var(--text-primary)}
        h1{font-size:56px;line-height:1.1;font-weight:800;letter-spacing:-0.02em}
        h2{font-size:40px;font-weight:700;position:relative;display:inline-block;margin-bottom:48px}
        h2::after{content:'';position:absolute;bottom:-8px;left:0;width:48px;height:3px;background:var(--accent-primary);border-radius:2px}
        h3{font-size:22px;font-weight:600}
        h4{font-size:18px;font-weight:600}
        @media(max-width:1023px){h1{font-size:42px}h2{font-size:32px}h3{font-size:20px}}
        @media(max-width:575px){h1{font-size:32px}h2{font-size:26px}h3{font-size:18px}}
        .section{padding:100px 0}
        @media(max-width:1023px){.section{padding:64px 0}}
        @media(max-width:575px){.section{padding:48px 0}}
        .section-alt{background:var(--bg-secondary)}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:16px;padding:14px 32px;border-radius:var(--radius-md);transition:var(--transition-base);white-space:nowrap}
        .btn-primary{background:var(--accent-primary);color:#0D0F14;border:2px solid var(--accent-primary)}
        .btn-primary:hover{background:#1AFFB5;border-color:#1AFFB5;transform:translateY(-2px);box-shadow:0 8px 32px rgba(0,229,160,0.35)}
        .btn-secondary{background:transparent;color:var(--accent-primary);border:1.5px solid var(--accent-primary)}
        .btn-secondary:hover{background:rgba(0,229,160,0.15);transform:translateY(-2px)}
        .btn-lg{padding:18px 40px;font-size:18px;border-radius:var(--radius-lg)}
        @media(max-width:767px){.btn{width:100%;max-width:320px}.btn-lg{max-width:360px}}
        /* Navigation */
        .nav{position:fixed;top:0;left:0;width:100%;height:var(--nav-height);z-index:1000;transition:var(--transition-base);display:flex;align-items:center}
        .nav.scrolled{background:rgba(26,29,38,0.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);box-shadow:0 2px 20px rgba(0,0,0,0.5);border-bottom:1px solid var(--border-color)}
        .nav-inner{display:flex;align-items:center;justify-content:space-between;max-width:var(--max-width);width:100%;margin:0 auto;padding:0 24px}
        .nav-logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:var(--text-primary);font-family:var(--font-title);z-index:1001}
        .nav-logo-dot{width:10px;height:10px;background:var(--accent-primary);border-radius:50%;display:inline-block;animation:pulse-dot 2s ease-in-out infinite}
        @keyframes pulse-dot{0%,100%{box-shadow:0 0 0 0 rgba(0,229,160,0.6)}50%{box-shadow:0 0 0 8px rgba(0,229,160,0)}}
        .nav-links{display:flex;align-items:center;gap:32px}
        .nav-links a{font-size:15px;font-weight:500;color:var(--text-secondary);position:relative;padding:4px 0;transition:var(--transition-base)}
        .nav-links a:hover,.nav-links a.active{color:var(--text-primary)}
        .nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--accent-primary);border-radius:1px;transition:width 0.25s ease}
        .nav-links a:hover::after,.nav-links a.active::after{width:100%}
        .nav-cta .btn{padding:10px 22px;font-size:14px}
        .nav-toggle{display:none;background:none;color:var(--text-primary);font-size:24px;z-index:1001;cursor:pointer}
        @media(max-width:1023px){
            .nav-links,.nav-cta{display:none}
            .nav-toggle{display:block}
            .nav.mobile-open{background:rgba(13,15,20,0.98);backdrop-filter:blur(20px)}
            .nav.mobile-open .nav-links{display:flex;flex-direction:column;position:fixed;top:0;left:0;width:100%;height:100vh;justify-content:center;align-items:center;gap:28px;z-index:1000}
            .nav.mobile-open .nav-links a{font-size:22px;font-weight:600}
            .nav.mobile-open .nav-cta{display:block;position:fixed;bottom:48px;left:50%;transform:translateX(-50%);z-index:1001}
            .nav.mobile-open .nav-cta .btn{padding:14px 40px;font-size:16px}
        }
        @media(max-width:575px){.nav-inner{padding:0 16px}}
        /* Hero */
        .hero{min-height:100vh;display:flex;align-items:center;padding-top:var(--nav-height);position:relative;overflow:hidden}
        .hero-bg{position:absolute;top:-20%;right:-15%;width:700px;height:700px;background:radial-gradient(circle,rgba(0,229,160,0.12) 0%,transparent 70%);border-radius:50%;pointer-events:none;animation:hero-float 6s ease-in-out infinite;z-index:0}
        @keyframes hero-float{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(-30px) scale(1.04)}}
        .hero-bg-2{position:absolute;bottom:-10%;right:5%;width:400px;height:400px;background:radial-gradient(circle,rgba(255,92,53,0.08) 0%,transparent 70%);border-radius:50%;pointer-events:none;animation:hero-float-2 8s ease-in-out infinite;z-index:0}
        @keyframes hero-float-2{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(20px) scale(1.05)}}
        .hero .container{display:grid;grid-template-columns:3fr 2fr;gap:60px;align-items:center;position:relative;z-index:1}
        .hero-content{display:flex;flex-direction:column;gap:28px}
        .hero-content h1{margin:0}
        .hero-content h1 span{color:var(--accent-primary)}
        .hero-sub{font-size:18px;color:var(--text-secondary);line-height:1.7;max-width:520px}
        .hero-btns{display:flex;gap:16px;flex-wrap:wrap}
        .hero-trust{display:flex;gap:32px;margin-top:8px;flex-wrap:wrap}
        .hero-trust-item{text-align:center}
        .hero-trust-num{font-size:40px;font-weight:800;font-family:var(--font-mono);color:var(--accent-primary);line-height:1.1}
        .hero-trust-label{font-size:13px;color:var(--text-muted);margin-top:4px}
        .hero-visual{position:relative;display:flex;align-items:center;justify-content:center}
        .hero-visual-img{width:100%;aspect-ratio:4/3;border-radius:var(--radius-lg);background:url('/assets/images/backpic/back-1.webp') center/cover;position:relative;overflow:hidden;border:1px solid var(--border-color);animation:hero-float 6s ease-in-out infinite;z-index:1}
        .hero-visual-img::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,229,160,0.15) 0%,rgba(255,92,53,0.08) 100%);pointer-events:none}
        @media(max-width:1023px){
            .hero .container{grid-template-columns:1fr;gap:40px}
            .hero-visual{order:-1}
            .hero-visual-img{max-width:480px;aspect-ratio:16/9}
            .hero-bg{top:-30%;right:-30%;width:400px;height:400px}
            .hero-content h1{font-size:36px}
            .hero-sub{font-size:16px;max-width:100%}
            .hero-trust{gap:20px}
            .hero-trust-num{font-size:32px}
        }
        @media(max-width:575px){
            .hero{min-height:auto;padding:100px 0 48px}
            .hero .container{gap:24px}
            .hero-visual-img{max-width:100%;aspect-ratio:4/3}
            .hero-btns{flex-direction:column}
            .hero-btns .btn{max-width:100%}
        }
        /* Highlights Grid */
        .highlights-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
        .highlight-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:32px 28px;transition:var(--transition-base);position:relative;overflow:hidden}
        .highlight-card:hover{border-color:var(--border-accent);transform:translateY(-4px);box-shadow:var(--shadow-hover);background:#1E222B}
        .highlight-icon{font-size:36px;color:var(--accent-primary);margin-bottom:20px;display:inline-block;transition:var(--transition-base)}
        .highlight-card:hover .highlight-icon{transform:rotate(15deg)}
        .highlight-card h3{margin-bottom:12px}
        .highlight-card p{font-size:15px;line-height:1.7;color:var(--text-secondary)}
        .highlight-card::after{content:'';position:absolute;bottom:0;left:28px;right:28px;height:1px;background:var(--border-color);opacity:0.5}
        @media(max-width:1023px){.highlights-grid{grid-template-columns:repeat(2,1fr);gap:20px}}
        @media(max-width:575px){.highlights-grid{grid-template-columns:1fr;gap:16px}.highlight-card{padding:24px 20px}}
        /* Timeline / Cases */
        .cases-list{display:flex;flex-direction:column;gap:60px}
        .case-item{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
        .case-item:nth-child(even){direction:rtl}
        .case-item:nth-child(even) .case-content{direction:ltr}
        .case-item:nth-child(even) .case-img-wrap{direction:ltr}
        .case-content{display:flex;flex-direction:column;gap:16px}
        .case-tag{display:inline-block;background:var(--accent-secondary);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:20px;width:fit-content;letter-spacing:0.04em}
        .case-content h3{font-size:26px}
        .case-content p{color:var(--text-secondary);line-height:1.7}
        .case-stats{display:flex;gap:32px;margin-top:8px}
        .case-stat-num{font-size:42px;font-weight:800;font-family:var(--font-mono);color:var(--accent-primary);line-height:1}
        .case-stat-label{font-size:13px;color:var(--text-muted);margin-top:4px}
        .case-img-wrap{border-radius:var(--radius-lg);overflow:hidden;transition:var(--transition-base);border:1px solid var(--border-color)}
        .case-img-wrap:hover{transform:scale(1.03)}
        .case-img-wrap img{width:100%;aspect-ratio:4/3;object-fit:cover}
        @media(max-width:1023px){
            .case-item,.case-item:nth-child(even){grid-template-columns:1fr;gap:24px;direction:ltr}
            .case-item:nth-child(even) .case-content{direction:ltr}
            .case-img-wrap{max-width:100%}
        }
        @media(max-width:575px){
            .cases-list{gap:40px}
            .case-content h3{font-size:20px}
            .case-stat-num{font-size:32px}
            .case-stats{gap:20px}
        }
        /* Pricing Table */
        .pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
        .pricing-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:36px 28px;display:flex;flex-direction:column;gap:20px;transition:var(--transition-base);position:relative}
        .pricing-card.featured{border:2px solid var(--accent-primary);background:#181C25;transform:scale(1.04);box-shadow:0 8px 40px rgba(0,229,160,0.1)}
        .pricing-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--accent-secondary);color:#fff;font-size:12px;font-weight:700;padding:6px 18px;border-radius:20px;letter-spacing:0.04em;white-space:nowrap}
        .pricing-card h3{font-size:24px}
        .pricing-price{font-size:42px;font-weight:800;font-family:var(--font-mono);color:var(--text-primary)}
        .pricing-price span{font-size:16px;font-weight:500;color:var(--text-muted)}
        .pricing-desc{font-size:14px;color:var(--text-muted);line-height:1.6}
        .pricing-features{display:flex;flex-direction:column;gap:14px;flex:1}
        .pricing-features li{display:flex;align-items:center;gap:10px;font-size:15px;color:var(--text-secondary)}
        .pricing-features li i.fa-check{color:var(--accent-primary);font-size:14px}
        .pricing-features li i.fa-times{color:var(--text-muted);font-size:14px}
        .pricing-card .btn{width:100%}
        @media(max-width:1023px){.pricing-grid{grid-template-columns:1fr;max-width:480px;margin:0 auto;gap:20px}.pricing-card.featured{transform:none}}
        @media(max-width:575px){.pricing-card{padding:28px 20px}.pricing-price{font-size:32px}}
        /* FAQ */
        .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px 32px}
        .faq-item{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden;transition:var(--transition-base)}
        .faq-question{width:100%;background:none;display:flex;align-items:center;justify-content:space-between;padding:20px 24px;font-size:17px;font-weight:600;color:var(--text-primary);text-align:left;gap:16px;position:relative;transition:var(--transition-base)}
        .faq-question::before{content:'';position:absolute;left:0;top:16px;bottom:16px;width:3px;background:var(--accent-primary);border-radius:0 2px 2px 0;transition:var(--transition-base)}
        .faq-item.open .faq-question::before{background:var(--accent-secondary)}
        .faq-icon{font-size:18px;color:var(--accent-primary);transition:var(--transition-base);flex-shrink:0}
        .faq-item.open .faq-icon{transform:rotate(45deg);color:var(--accent-secondary)}
        .faq-answer{max-height:0;overflow:hidden;transition:max-height 0.35s ease,opacity 0.35s ease;opacity:0}
        .faq-item.open .faq-answer{max-height:300px;opacity:1}
        .faq-answer-inner{padding:0 24px 20px 24px;font-size:15px;line-height:1.7;color:var(--text-secondary)}
        @media(max-width:767px){.faq-grid{grid-template-columns:1fr;gap:12px}.faq-question{font-size:15px;padding:16px 18px}.faq-answer-inner{padding:0 18px 16px 18px}}
        /* CTA Banner */
        .cta-banner{background:var(--bg-secondary);position:relative;overflow:hidden;text-align:center;padding:80px 24px}
        .cta-banner::before{content:'';position:absolute;inset:0;background-image:radial-gradient(circle at 30% 50%,rgba(0,229,160,0.04) 0%,transparent 50%),radial-gradient(circle at 70% 50%,rgba(255,92,53,0.03) 0%,transparent 50%);pointer-events:none}
        .cta-banner h2{font-size:44px;margin-bottom:12px;position:relative}
        .cta-banner h2::after{display:none}
        .cta-banner .cta-sub{font-size:18px;color:var(--text-secondary);margin-bottom:32px;position:relative}
        .cta-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;position:relative;margin-bottom:20px}
        .cta-trust{font-size:14px;color:var(--text-muted);position:relative}
        @media(max-width:767px){.cta-banner h2{font-size:28px}.cta-banner{padding:56px 16px}.cta-btns{flex-direction:column;align-items:center}}
        /* Footer */
        .footer{background:var(--bg-primary);border-top:1px solid var(--accent-primary);padding:60px 0 0}
        .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:40px;padding-bottom:40px}
        .footer-col h4{font-size:16px;font-weight:700;color:var(--text-primary);margin-bottom:20px}
        .footer-col p,.footer-col a,.footer-col li{font-size:14px;color:var(--text-muted);line-height:2;transition:var(--transition-base)}
        .footer-col a:hover{color:var(--accent-primary)}
        .footer-logo{font-size:20px;font-weight:800;color:var(--text-primary);margin-bottom:12px;display:inline-flex;align-items:center;gap:8px}
        .footer-social{display:flex;gap:14px;margin-top:16px}
        .footer-social a{width:36px;height:36px;border-radius:50%;background:var(--bg-secondary);display:flex;align-items:center;justify-content:center;font-size:16px;color:var(--text-muted);transition:var(--transition-base);border:1px solid var(--border-color)}
        .footer-social a:hover{color:var(--accent-primary);border-color:var(--accent-primary);background:#1E222B}
        .footer-bottom{border-top:1px solid var(--border-color);padding:20px 0;text-align:center;font-size:13px;color:var(--text-muted)}
        @media(max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
        @media(max-width:575px){.footer-grid{grid-template-columns:1fr;gap:24px}.footer{padding:40px 0 0}}