/* roulang page: index */
:root {
            --color-primary: #0F1923;
            --color-brand: #00A86B;
            --color-brand-hover: #059669;
            --color-copper: #C87D55;
            --color-dark: #0A0F14;
            --text-main: #334155;
            --text-heading: #0F172A;
            --text-muted: #64748B;
            --bg-page: #FFFFFF;
            --radius-md: 4px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-page);
            box-sizing: border-box;
            overflow-x: hidden;
        }

        .industrial-card {
            border: 1px solid #E2E8F0;
            transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .industrial-card:hover {
            transform: translateY(-2px);
            border-color: #00A86B;
            box-shadow: 0 4px 12px rgba(0, 168, 107, 0.08);
        }

        .hero-banner-bg {
            background-image: linear-gradient(to right, rgba(15, 25, 35, 0.95), rgba(15, 25, 35, 0.8)), url('/assets/images/efc3017f50b55644.jpg');
            background-size: cover;
            background-position: center;
        }

        .solutions-bg {
            background-image: linear-gradient(to bottom, rgba(10, 15, 20, 0.96), rgba(10, 15, 20, 0.98)), url('/assets/images/ee883751d3093cda.png');
            background-size: cover;
            background-position: center;
        }

        .faq-accordion-item[open] summary svg {
            transform: rotate(180deg);
        }