/* roulang page: index */
:root {
            --primary: #0F4C5C;
            --primary-dark: #0B3844;
            --accent: #FB8B24;
            --electric: #00A896;
            --darkness: #131E29;
            --ink: #0D1B2A;
            --slate: #415A77;
            --mist: #778DA9;
            --sand: #F8F9FA;
        }
        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--ink);
            background-color: var(--sand);
        }
        body {
            overflow-x: hidden;
        }
        .container-custom {
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        .card-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 76, 92, 0.08);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-shadow:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 28px -4px rgba(15, 76, 92, 0.16);
        }
        .glow-border {
            border: 1px solid rgba(15, 76, 92, 0.12);
        }
        details summary::-webkit-details-marker {
            display: none;
        }