/* roulang page: index */
:root {
            --primary: #D4943A;
            --primary-light: #E8B85F;
            --primary-dark: #B87A2C;
            --primary-glow: #F0D9A0;
            --bg-dark: #121212;
            --bg-card: #1A1D22;
            --bg-nav: #1E2126;
            --border-subtle: rgba(255,255,255,0.08);
            --text-primary: #F2F1EE;
            --text-secondary: #B8B6B0;
            --text-muted: #7A7872;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-pill: 50px;
            --shadow-card: 0 4px 16px rgba(0,0,0,0.3);
            --shadow-hover: 0 8px 28px rgba(0,0,0,0.45);
            --shadow-glow: 0 0 20px rgba(212,148,58,0.25);
            --transition-fast: 0.2s cubic-bezier(0.4,0,0.2,1);
            --transition-smooth: 0.3s cubic-bezier(0.4,0,0.2,1);
        }
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
        body{font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;line-height:1.8;color:var(--text-primary);background:var(--bg-dark);overflow-x:hidden;min-height:100vh}
        a{color:var(--primary);text-decoration:none;transition:color var(--transition-fast)}
        a:hover{color:var(--primary-light)}
        img{max-width:100%;height:auto;display:block}
        button,input,textarea{font-family:inherit}
        input:focus,textarea:focus{outline:none;border-color:var(--primary)!important;box-shadow:0 0 0 3px rgba(212,148,58,0.2)!important}
        ::selection{background:rgba(212,148,58,0.35);color:#fff}
        .container{max-width:1200px;margin:0 auto;padding:0 16px}
        @media(min-width:768px){.container{padding:0 24px}}
        @media(min-width:1024px){.container{padding:0 32px}}
        .nav-blur{backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);background:rgba(30,33,38,0.88)}
        .card-glass{background:rgba(26,29,34,0.85);border:1px solid var(--border-subtle);border-radius:var(--radius-card);box-shadow:var(--shadow-card);transition:all var(--transition-smooth)}
        .card-glass:hover{border-color:var(--primary);box-shadow:var(--shadow-hover),var(--shadow-glow);transform:translateY(-2px)}
        .btn-primary{background:var(--primary);color:#fff;border:none;border-radius:var(--radius-btn);padding:12px 24px;font-size:15px;font-weight:600;cursor:pointer;transition:all var(--transition-fast);display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
        .btn-primary:hover{background:var(--primary-light);box-shadow:var(--shadow-glow);transform:translateY(-1px)}
        .btn-primary:active{transform:translateY(0);background:var(--primary-dark)}
        .btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary);border-radius:var(--radius-btn);padding:10px 22px;font-size:15px;font-weight:600;cursor:pointer;transition:all var(--transition-fast);display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
        .btn-outline:hover{background:rgba(212,148,58,0.1);border-color:var(--primary-light);color:var(--primary-light);box-shadow:var(--shadow-glow)}
        .btn-outline:active{background:rgba(212,148,58,0.2)}
        .btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid transparent;border-radius:var(--radius-btn);padding:8px 16px;font-size:14px;cursor:pointer;transition:all var(--transition-fast)}
        .btn-ghost:hover{color:var(--primary);border-color:var(--border-subtle);background:rgba(255,255,255,0.03)}
        .section-padding{padding:80px 0}
        @media(max-width:768px){.section-padding{padding:48px 0}}
        .section-title{font-size:28px;font-weight:700;color:var(--text-primary);line-height:1.4;margin-bottom:12px;text-align:center}
        @media(max-width:640px){.section-title{font-size:22px}}
        .section-subtitle{font-size:16px;color:var(--text-secondary);line-height:1.8;text-align:center;max-width:680px;margin:0 auto 40px}
        @media(max-width:640px){.section-subtitle{font-size:14px;margin-bottom:28px}}
        .nav-link{color:var(--text-secondary);font-size:14px;font-weight:500;padding:8px 14px;border-radius:6px;transition:all var(--transition-fast);position:relative;white-space:nowrap}
        .nav-link:hover{color:var(--primary);background:rgba(212,148,58,0.08)}
        .nav-link::after{content:'';position:absolute;bottom:2px;left:50%;width:0;height:2px;background:var(--primary);transition:all var(--transition-smooth);transform:translateX(-50%);border-radius:1px}
        .nav-link:hover::after{width:60%}
        .lang-switch{border:1px solid rgba(255,255,255,0.2);border-radius:var(--radius-pill);padding:6px 14px;font-size:12px;color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast);background:rgba(255,255,255,0.04);white-space:nowrap}
        .lang-switch:hover{border-color:var(--primary);color:var(--primary);background:rgba(212,148,58,0.08)}
        .lang-switch:active{transform:scale(0.95)}
        .hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;z-index:50;background:none;border:none}
        .hamburger span{display:block;width:24px;height:2px;background:var(--text-primary);border-radius:1px;transition:all var(--transition-fast)}
        .hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
        .hamburger.active span:nth-child(2){opacity:0}
        .hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
        @media(max-width:1024px){.hamburger{display:flex}.nav-links-desktop{display:none!important}}
        .mobile-menu{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(18,18,18,0.97);z-index:40;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;transform:translateY(-100%);transition:transform var(--transition-smooth)}
        .mobile-menu.open{transform:translateY(0)}
        .mobile-menu a{font-size:18px;color:var(--text-primary);padding:12px 24px;border-radius:8px;transition:all var(--transition-fast)}
        .mobile-menu a:hover{color:var(--primary);background:rgba(212,148,58,0.1)}
        .stat-number{font-family:'DIN Alternate','Helvetica Neue',sans-serif;font-weight:700;letter-spacing:0.02em}
        .faq-item{border:1px solid var(--border-subtle);border-radius:var(--radius-card);margin-bottom:10px;overflow:hidden;transition:all var(--transition-fast);background:rgba(26,29,34,0.6)}
        .faq-item:hover{border-color:rgba(255,255,255,0.15)}
        .faq-question{padding:16px 20px;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:12px;font-weight:600;font-size:15px;color:var(--text-primary);user-select:none;transition:all var(--transition-fast)}
        .faq-question:hover{color:var(--primary)}
        .faq-icon{flex-shrink:0;width:22px;height:22px;display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--primary);transition:transform var(--transition-smooth);font-weight:700}
        .faq-item.open .faq-icon{transform:rotate(45deg)}
        .faq-answer{max-height:0;overflow:hidden;transition:max-height var(--transition-smooth);padding:0 20px;color:var(--text-secondary);font-size:14px;line-height:1.8}
        .faq-item.open .faq-answer{max-height:400px;padding:0 20px 16px}
        .floating-bar{position:fixed;bottom:0;left:0;right:0;background:rgba(26,29,34,0.95);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--border-subtle);padding:10px 16px;z-index:60;display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap;transform:translateY(100%);transition:transform var(--transition-smooth)}
        .floating-bar.visible{transform:translateY(0)}
        @media(min-width:768px){.floating-bar{padding:12px 24px;gap:24px}}
        .scrollbar-hide::-webkit-scrollbar{display:none}
        .scrollbar-hide{-ms-overflow-style:none;scrollbar-width:none}
        .pulse-glow{animation:pulseGlow 2.2s ease-in-out infinite}
        @keyframes pulseGlow{0%,100%{box-shadow:0 0 12px rgba(212,148,58,0.2)}50%{box-shadow:0 0 28px rgba(212,148,58,0.45)}}
        .tag-badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:var(--radius-pill);font-size:11px;font-weight:600;white-space:nowrap}
        .tag-certified{background:rgba(212,148,58,0.18);color:var(--primary-glow);border:1px solid rgba(212,148,58,0.3)}
        .tag-new{background:rgba(240,217,160,0.12);color:var(--primary-glow);border:1px solid rgba(240,217,160,0.25)}
        .star-rating{color:var(--primary-glow);letter-spacing:2px;font-size:13px}
        @media(max-width:640px){.hide-mobile{display:none!important}.section-title{font-size:20px}.stat-number{font-size:28px!important}}