/* roulang page: index */
:root {
            --primary: #10B981;
            --primary-dark: #059669;
            --dark: #0F172A;
            --accent: #F97316;
            --bg-soft: #F8F9FA;
            --text-main: #1E293B;
            --text-muted: #64748B;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-soft);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        .hero-banner-bg {
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(10, 15, 29, 0.96) 100%), url('/assets/images/b798dc5c6acd1a78.jpg');
            background-size: cover;
            background-position: center;
        }
        .deep-obsidian-bg {
            background-image: linear-gradient(180deg, rgba(10, 15, 29, 0.98) 0%, rgba(15, 23, 42, 0.97) 100%), url('/assets/images/bbef0f55b347bbae.webp');
            background-size: cover;
            background-position: center;
        }
        .custom-card-shadow {
            box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .custom-card-shadow:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 35px -10px rgba(0, 0, 0, 0.08), 0 8px 10px -4px rgba(0, 0, 0, 0.03);
        }
        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .timeline-line::before {
            content: '';
            position: absolute;
            left: 19px;
            top: 24px;
            bottom: 0;
            width: 2px;
            background-color: #E2E8F0;
        }