/* roulang page: index */
:root {
            --primary-slate: #0F172A;
            --brand-teal: #0D9488;
            --brand-teal-hover: #0F766E;
            --accent-amber: #F59E0B;
            --bg-light: #F8FAFC;
            --card-border: rgba(15, 23, 42, 0.08);
            --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: #1E293B;
            line-height: 1.7;
            overflow-x: hidden;
        }

        section {
            scroll-margin-top: 108px;
        }

        .clip-diagonal {
            clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out, opacity 0.25s ease-out;
            opacity: 0;
        }

        .accordion-item.active .accordion-content {
            max-height: 420px;
            opacity: 1;
        }

        .accordion-item.active .accordion-icon {
            transform: rotate(180deg);
        }

        .toast-notification {
            transform: translateY(150%);
            transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
        }

        .toast-notification.show {
            transform: translateY(0);
        }