/* roulang page: index */
:root {
            --primary: #635BFF;
            --primary-hover: #4E44E6;
            --accent: #00D4B2;
            --accent-hover: #00B89A;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-dark: #0B0F19;
            --text-title: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --radius-xl: 16px;
            --shadow-soft: 0 10px 30px -10px rgba(99, 91, 255, 0.08);
            --shadow-card: 0 12px 35px -8px rgba(15, 23, 42, 0.06);
        }

        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        body {
            color: var(--text-body);
            background-color: var(--bg-light);
            line-height: 1.65;
            letter-spacing: -0.01em;
            overflow-x: hidden;
        }

        h1, h2, h3, h4, h5 {
            color: var(--text-title);
            letter-spacing: -0.02em;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: scale(1.02);
            box-shadow: 0 8px 24px rgba(99, 91, 255, 0.35);
        }

        .btn-accent {
            background-color: var(--accent);
            color: #0B0F19;
            font-weight: 600;
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .btn-accent:hover {
            background-color: var(--accent-hover);
            transform: scale(1.02);
            box-shadow: 0 8px 24px rgba(0, 212, 178, 0.4);
        }

        .card-box {
            background: #ffffff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            border: 1px solid rgba(226, 232, 240, 0.8);
        }
        .card-box:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 40px -12px rgba(99, 91, 255, 0.12);
            border-color: rgba(99, 91, 255, 0.25);
        }

        .dark-card-box {
            background: #131B2E;
            border-radius: var(--radius-xl);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.3s ease;
        }
        .dark-card-box:hover {
            border-color: rgba(0, 212, 178, 0.4);
            transform: translateY(-4px);
            box-shadow: 0 20px 40px -12px rgba(0, 212, 178, 0.15);
        }

        .badge-purple {
            background: rgba(99, 91, 255, 0.1);
            color: var(--primary);
        }

        .badge-cyan {
            background: rgba(0, 212, 178, 0.12);
            color: #00A88F;
        }

        /* 隐藏滚动条 */
        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }
        .no-scrollbar {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }