/* roulang page: index */
:root {
            --color-primary: #1B4332;
            --color-accent: #2D6A4F;
            --color-gold: #D97706;
            --bg-neutral: #F8FAF9;
            --text-main: #0F241D;
            --text-muted: #4A5568;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-neutral);
            color: var(--text-main);
            line-height: 1.75;
            overflow-x: hidden;
        }
        html {
            scroll-behavior: smooth;
        }
        .text-main-title {
            color: var(--text-main);
        }
        .section-alt {
            background-color: #FFFFFF;
        }
        .card-custom {
            background: #FFFFFF;
            border: 1px solid #E2E8F0;
            border-radius: 0.75rem;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px -8px rgba(27, 67, 50, 0.12);
            border-color: #52B788;
        }
        .active-tab {
            background-color: #2D6A4F;
            color: #ffffff;
        }