/* roulang page: index */
:root {
            --color-primary: #00F2FE;
            --color-primary-dark: #00B4D8;
            --color-accent: #FF8A00;
            --color-bg-dark: #0A0D14;
            --color-bg-card: #131A29;
            --color-text-main: #0F172A;
            --color-text-muted: #64748B;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: #F8FAFC;
            color: #334155;
            overflow-x: hidden;
        }

        .gradient-text {
            background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .gradient-border-card {
            position: relative;
            background: #ffffff;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .gradient-border-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 30px -10px rgba(0, 242, 254, 0.15);
        }

        .dark-card {
            background: rgba(19, 26, 41, 0.85);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            transition: all 0.3s ease;
        }

        .dark-card:hover {
            border-color: rgba(0, 242, 254, 0.4);
            transform: translateY(-3px);
        }

        /* 隐藏 details 默认三角箭头 */
        details summary::-webkit-details-marker {
            display: none;
        }
        details summary {
            list-style: none;
        }