/* roulang page: index */
:root {
            --color-primary: #1D4ED8;
            --color-accent: #0284C7;
            --color-bg-base: #FFFFFF;
            --color-bg-alt: #F8FAFC;
            --color-text-main: #0F172A;
            --color-text-muted: #334155;
            --color-border: #E2E8F0;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--color-text-main);
            background-color: var(--color-bg-base);
            overflow-x: hidden;
        }

        /* 斜切装饰多边形 */
        .hero-diagonal-bg {
            clip-path: polygon(0 0, 100% 0, 100% 86%, 0 100%);
        }
        @media (min-width: 1024px) {
            .hero-diagonal-bg {
                clip-path: polygon(0 0, 100% 0, 100% 89%, 0 100%);
            }
        }

        /* 统一卡片平滑过渡 */
        .smart-card {
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .smart-card:hover {
            transform: translateY(-6px);
        }

        /* 手风琴平滑展开 */
        .faq-answer {
            transition: max-height 0.35s ease-out, opacity 0.3s ease-out;
            max-height: 0;
            overflow: hidden;
            opacity: 0;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            opacity: 1;
        }
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }