/* roulang page: index */
:root {
            --primary: #0052D9;
            --primary-hover: #003CAB;
            --electric: #0066FF;
            --accent: #00D084;
            --dark: #0A1128;
            --slate: #0D1117;
            --text-main: #1E293B;
            --text-muted: #475569;
            --text-sub: #94A3B8;
            --bg-light: #F4F7FC;
            --border-light: rgba(226, 232, 240, 0.85);
            --shadow-subtle: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
            --shadow-glow: 0 10px 30px -5px rgba(0, 82, 217, 0.25);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: #FFFFFF;
            color: var(--text-main);
        }

        body {
            overflow-x: hidden;
            line-height: 1.6;
        }

        .container-custom {
            width: 100%;
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: clamp(1rem, 3.5vw, 2rem);
            padding-right: clamp(1rem, 3.5vw, 2rem);
        }

        .header-glass {
            background-color: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }

        .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent);
            display: inline-block;
            position: relative;
        }
        .live-dot::after {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background-color: rgba(0, 208, 132, 0.4);
            animation: pulse-ring 1.8s cubic-bezier(0.24, 0, 0.38, 1) infinite;
        }

        @keyframes pulse-ring {
            0% { transform: scale(0.7); opacity: 0.9; }
            50% { transform: scale(1.6); opacity: 0.3; }
            100% { transform: scale(2.2); opacity: 0; }
        }

        .hero-banner-bg {
            background-image: linear-gradient(135deg, rgba(10, 17, 40, 0.88) 0%, rgba(13, 17, 23, 0.94) 100%), url('/assets/images/64ba48b02d032eec.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .card-modern {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: 14px;
            box-shadow: var(--shadow-subtle);
            transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
        }
        .card-modern:hover {
            transform: translateY(-4px);
            box-shadow: 0 14px 30px -8px rgba(0, 82, 217, 0.12);
            border-color: rgba(0, 102, 255, 0.3);
        }

        .card-dark {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 14px;
            backdrop-filter: blur(8px);
            transition: border-color 0.25s, transform 0.25s;
        }
        .card-dark:hover {
            border-color: rgba(0, 208, 132, 0.45);
            transform: translateY(-3px);
        }

        .btn-brand {
            background: linear-gradient(135deg, #0052D9 0%, #0066FF 100%);
            color: #FFFFFF;
            font-weight: 600;
            border-radius: 8px;
            padding: 0.75rem 1.6rem;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
            box-shadow: 0 4px 14px rgba(0, 82, 217, 0.3);
        }
        .btn-brand:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 82, 217, 0.45);
            background: linear-gradient(135deg, #0045B5 0%, #0052D9 100%);
        }

        .btn-outline-white {
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #FFFFFF;
            font-weight: 500;
            border-radius: 8px;
            padding: 0.75rem 1.6rem;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            backdrop-filter: blur(4px);
            transition: all 0.2s ease;
        }
        .btn-outline-white:hover {
            border-color: #FFFFFF;
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-2px);
        }

        .badge-subtle {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.65rem;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 9999px;
            background-color: rgba(0, 82, 217, 0.08);
            color: var(--primary);
        }

        details > summary {
            list-style: none;
            cursor: pointer;
        }
        details > summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary .arrow-icon {
            transform: rotate(180deg);
        }

        .form-input {
            width: 100%;
            background-color: #FFFFFF;
            border: 1px solid #CBD5E1;
            border-radius: 8px;
            padding: 0.75rem 1rem;
            font-size: 0.95rem;
            color: #1E293B;
            transition: all 0.2s ease;
        }
        .form-input:focus {
            outline: none;
            border-color: #0066FF;
            box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.18);
        }