/* roulang page: index */
:root {
            --brand-neon: #00E575;
            --brand-emerald: #059669;
            --brand-cyan: #06B6D4;
            --brand-dark: #0B0F19;
            --slate-border: #E2E8F0;
        }

        /* 基础滚动平滑与字体平滑 */
        html {
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        /* 自定义微光渐变 */
        .glow-border {
            border: 1px solid rgba(0, 229, 117, 0.25);
            box-shadow: 0 0 20px -5px rgba(0, 229, 117, 0.15);
        }
        .glow-border:hover {
            border-color: rgba(0, 229, 117, 0.5);
            box-shadow: 0 0 30px -3px rgba(0, 229, 117, 0.28);
        }

        /* 折叠手风琴细节 */
        details summary::-webkit-details-marker {
            display: none;
        }
        details summary {
            list-style: none;
        }
        details[open] summary .faq-icon {
            transform: rotate(180deg);
        }

        /* 侧边抽屉动画过渡 */
        #drawer-backdrop {
            transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s;
        }
        #drawer-panel {
            transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
        }

        /* 底部固定转化条过渡 */
        #sticky-bar {
            transition: transform 0.3s ease-out, opacity 0.3s ease-out;
        }