/* roulang page: index */
:root {
            --primary-color: #0f172a;
            --accent-color: #e11d48;
            --text-color: #334155;
            --bg-light: #f8fafc;
            --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
            --radius: 12px;
        }
        body { font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; color: var(--text-color); background-color: var(--bg-light); line-height: 1.6; }
        .navbar { background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,0.1); padding: 1rem 0; }
        .hero { background: var(--primary-color); color: #fff; padding: 4rem 0; border-radius: 0 0 40px 40px; }
        .hero h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 1.5rem; }
        .hero-data { display: flex; gap: 2rem; margin-top: 2rem; }
        .data-item { border-left: 2px solid var(--accent-color); padding-left: 1rem; }
        .section-padding { padding: 4rem 0; }
        .card { border: none; box-shadow: var(--card-shadow); border-radius: var(--radius); transition: transform 0.3s ease; }
        .card:hover { transform: translateY(-5px); }
        .btn-accent { background-color: var(--accent-color); color: #fff; padding: 0.6rem 1.5rem; border-radius: 8px; font-weight: 600; text-decoration: none; }
        .btn-accent:hover { background-color: #be123c; color: #fff; }
        .ranking-item { display: flex; align-items: center; padding: 1rem; border-bottom: 1px solid #e2e8f0; }
        .ranking-num { font-size: 1.5rem; font-weight: 700; color: var(--accent-color); margin-right: 1.5rem; width: 3rem; }
        .badge-category { background: #e0e7ff; color: #4338ca; padding: 0.25rem 0.75rem; border-radius: 999px; font-size: 0.85rem; }
        footer { background: var(--primary-color); color: #94a3b8; padding: 3rem 0; margin-top: 4rem; }

/* roulang page: article */
:root {
 --primary-color: #0f172a;
 --accent-color: #e11d48;
 --text-color: #334155;
 --bg-light: #f8fafc;
 --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
 --radius: 12px;
}
body { font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; color: var(--text-color); background-color: var(--bg-light); line-height: 1.6; }
.navbar { background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,0.1); padding: 1rem 0; }
.hero { background: var(--primary-color); color: #fff; padding: 4rem 0; border-radius: 0 0 40px 40px; }
.hero h1 { font-size: 2.25rem; font-weight: 800; margin-bottom: 1.25rem; line-height: 1.3; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 1.5rem; color: #94a3b8; font-size: 0.95rem; margin-top: 1rem; }
.hero-meta span { display: inline-flex; align-items: center; }
.hero-meta strong { color: #f1f5f9; margin-left: 0.25rem; }
.roadmap-timeline { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,0.12); }
.roadmap-step { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: 8px; padding: 0.6rem 1rem; font-size: 0.875rem; color: #cbd5e1; }
.roadmap-step.active { background: var(--accent-color); border-color: var(--accent-color); color: #fff; font-weight: 600; }
.section-padding { padding: 3.5rem 0; }
.section-alt { background: #ffffff; }
.card { border: none; box-shadow: var(--card-shadow); border-radius: var(--radius); transition: transform 0.3s ease; }
.card:hover { transform: translateY(-5px); }
.btn-accent { background-color: var(--accent-color); color: #fff; padding: 0.6rem 1.5rem; border-radius: 8px; font-weight: 600; text-decoration: none; display: inline-block; }
.btn-accent:hover { background-color: #be123c; color: #fff; }
.ranking-item { display: flex; align-items: center; padding: 1rem; border-bottom: 1px solid #e2e8f0; }
.badge-category { background: #e0e7ff; color: #4338ca; padding: 0.25rem 0.75rem; border-radius: 999px; font-size: 0.85rem; font-weight: 500; }
.answer-box { background: #eff6ff; border-left: 4px solid #2563eb; border-radius: 0 var(--radius) var(--radius) 0; padding: 1.5rem; margin-bottom: 2rem; }
.article-body { font-size: 1.05rem; line-height: 1.85; color: #1e293b; }
.article-body h2 { font-size: 1.5rem; font-weight: 700; margin-top: 2.25rem; margin-bottom: 1rem; color: var(--primary-color); border-bottom: 2px solid #e2e8f0; padding-bottom: 0.5rem; }
.article-body h3 { font-size: 1.25rem; font-weight: 600; margin-top: 1.75rem; margin-bottom: 0.75rem; color: #334155; }
.article-body p { margin-bottom: 1.25rem; }
.article-body ul, .article-body ol { margin-bottom: 1.5rem; padding-left: 1.5rem; }
.article-body li { margin-bottom: 0.5rem; }
.article-body blockquote { border-left: 4px solid var(--accent-color); padding: 0.75rem 1.25rem; background: #fff1f2; color: #881337; margin: 1.5rem 0; border-radius: 0 8px 8px 0; }
.article-body table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
.article-body th, .article-body td { border: 1px solid #e2e8f0; padding: 0.75rem; text-align: left; }
.article-body th { background: #f1f5f9; font-weight: 600; }
.article-sidebar { position: sticky; top: 90px; }
.spec-list dt { font-weight: 600; color: #64748b; font-size: 0.875rem; }
.spec-list dd { margin-bottom: 0.75rem; color: var(--primary-color); font-weight: 500; }
.channel-box { border: 1px dashed #cbd5e1; background: #f8fafc; border-radius: var(--radius); padding: 1.25rem; }
footer { background: var(--primary-color); color: #94a3b8; padding: 3rem 0; margin-top: 4rem; }