/* roulang page: index */
:root {
            --primary: #b8860b;
            --primary-dark: #8a6508;
            --secondary: #2d1b4e;
            --bg: #faf7f2;
            --surface: #ffffff;
            --text: #1f1f1f;
            --muted: #6b6b6b;
            --border: #e7e0d5;
            --radius-sm: 0.5rem;
            --radius-md: 1rem;
            --radius-lg: 1.5rem;
            --radius-xl: 2rem;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow-md: 0 6px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 40px rgba(0,0,0,0.12);
            --transition: all 0.25s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .bg-brand-gradient {
            background: linear-gradient(135deg, #2d1b4e 0%, #3b2a52 25%, #6b4f3a 65%, #a67c3d 100%);
        }
        .text-gradient-gold {
            background: linear-gradient(135deg, #f5e6c8 0%, #e6c27a 40%, #d4a85c 80%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .badge-custom {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.375rem 0.875rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            background: rgba(255,255,255,0.12);
            color: #f5e6c8;
            border: 1px solid rgba(255,255,255,0.25);
            backdrop-filter: blur(8px);
        }
        .badge-solid {
            background: var(--primary);
            color: #fff;
            border: none;
        }
        .explosion-badge {
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            width: 84px;
            height: 84px;
            border-radius: 50%;
            background: #e63946;
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            text-align: center;
            box-shadow: 0 8px 24px rgba(230,57,70,0.45);
            transform: rotate(-12deg);
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { transform: rotate(-12deg) scale(1); }
            50% { transform: rotate(-12deg) scale(1.05); }
            100% { transform: rotate(-12deg) scale(1); }
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, #d4a85c 0%, #b8860b 100%);
            color: #fff;
            font-weight: 700;
            padding: 0.875rem 2rem;
            border-radius: 9999px;
            box-shadow: 0 10px 25px rgba(184,134,11,0.35);
            transition: var(--transition);
            border: none;
            cursor: pointer;
            letter-spacing: 0.02em;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 16px 32px rgba(184,134,11,0.5);
            background: linear-gradient(135deg, #e5be7a 0%, #c9971f 100%);
        }
        .btn-primary:active {
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(184,134,11,0.4);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid rgba(255,255,255,0.6);
            color: #fff;
            padding: 0.75rem 1.75rem;
            border-radius: 9999px;
            font-weight: 600;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .card-hover {
            transition: var(--transition);
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .card-hover:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: rgba(184,134,11,0.4);
        }
        .nav-link {
            position: relative;
            padding: 0.5rem 0.25rem;
            font-weight: 500;
            color: #e5e0d8;
            transition: var(--transition);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0%;
            height: 2px;
            background: #d4a85c;
            transition: width 0.3s ease;
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }
        .nav-link.active {
            color: #fff;
        }
        .nav-link:hover {
            color: #fff;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.2;
            color: #2d1b4e;
        }
        .section-subtitle {
            color: var(--muted);
            font-size: 1rem;
            max-width: 700px;
            margin-top: 0.75rem;
        }
        .progress-bar-custom {
            height: 8px;
            background: #e9e2d5;
            border-radius: 9999px;
            overflow: hidden;
        }
        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #e63946, #d4a85c);
            border-radius: 9999px;
            transition: width 0.6s ease;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 1.25rem 0;
        }
        .faq-question {
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            color: #2d1b4e;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            color: var(--muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-top: 0.75rem;
        }
        .footer-link {
            color: #bdb3a3;
            transition: var(--transition);
            display: inline-block;
            font-size: 0.9rem;
        }
        .footer-link:hover {
            color: #f5e6c8;
            transform: translateX(3px);
        }
        @media (max-width: 768px) {
            .container { padding: 0 1rem; }
            .section-title { font-size: 1.5rem; }
            .explosion-badge { width: 68px; height: 68px; font-size: 0.9rem; }
            .btn-primary { padding: 0.75rem 1.5rem; font-size: 0.9rem; }
        }
        @media (max-width: 520px) {
            .section-title { font-size: 1.35rem; }
        }