/* roulang page: index */
:root {
  --primary: #1a56db;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --accent-light: #fbbf24;
  --bg: #f8fafc;
  --bg-dark: #0f172a;
  --bg-card: #ffffff;
  --text: #111827;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --border: #e5e7eb;
  --border-light: #f1f5f9;
  --radius: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.10);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --container: 1200px;
  --nav-height: 72px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-sans); color: var(--text); background: var(--bg); line-height: 1.7; font-size: 16px; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }
.section { padding: 80px 0; }
.section-dark { background: var(--bg-dark); color: #fff; }
.section-light { background: var(--bg); }
.section-white { background: #fff; }
.section-title { font-size: 2.25rem; font-weight: 800; line-height: 1.25; margin-bottom: 0.75rem; letter-spacing: -0.02em; }
.section-subtitle { font-size: 1.125rem; color: var(--text-secondary); max-width: 640px; line-height: 1.7; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header .section-subtitle { margin: 0 auto; }
.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.text-primary { color: var(--primary); }
.mt-12 { margin-top: 12px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-48 { margin-bottom: 48px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 1024px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 24px; } }

/* Header / Nav */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; height: var(--nav-height); transition: var(--transition); background: rgba(255,255,255,0.72); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid rgba(255,255,255,0.3); }
.header.scrolled { background: rgba(255,255,255,0.95); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 800; color: var(--text); letter-spacing: -0.02em; }
.logo i { color: var(--primary); font-size: 1.6rem; }
.logo:hover { color: var(--primary); }
.nav-list { display: flex; align-items: center; gap: 8px; }
.nav-list li a { display: flex; align-items: center; gap: 6px; padding: 8px 18px; border-radius: var(--radius); font-size: 0.95rem; font-weight: 500; color: var(--text-secondary); transition: var(--transition); position: relative; }
.nav-list li a i { font-size: 0.85rem; }
.nav-list li a:hover, .nav-list li a.active { color: var(--primary); background: rgba(26,86,219,0.08); }
.nav-list li a.active { font-weight: 600; }
.nav-cta { display: inline-flex; align-items: center; gap: 8px; padding: 10px 24px; background: var(--primary); color: #fff !important; border-radius: var(--radius); font-weight: 600; font-size: 0.95rem; transition: var(--transition); }
.nav-cta i { font-size: 0.9rem; }
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.mobile-toggle { display: none; font-size: 1.5rem; color: var(--text); padding: 8px; border-radius: var(--radius); cursor: pointer; transition: var(--transition); }
.mobile-toggle:hover { background: rgba(0,0,0,0.05); }
@media (max-width: 768px) {
  .mobile-toggle { display: flex; }
  .nav-list { position: fixed; top: var(--nav-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); flex-direction: column; padding: 16px 24px 24px; gap: 4px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg); transform: translateY(-110%); opacity: 0; pointer-events: none; transition: var(--transition); }
  .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: all; }
  .nav-list li { width: 100%; }
  .nav-list li a { width: 100%; padding: 12px 16px; }
  .nav-cta { justify-content: center; margin-top: 8px; }
}

/* Hero */
.hero { min-height: 100vh; display: flex; align-items: center; position: relative; background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #1a56db 100%); overflow: hidden; padding-top: var(--nav-height); }
.hero::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat; opacity: 0.2; mix-blend-mode: overlay; }
.hero::after { content: ''; position: absolute; bottom: -1px; left: 0; right: 0; height: 120px; background: linear-gradient(to top, var(--bg), transparent); pointer-events: none; }
.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; padding-top: 40px; padding-bottom: 80px; }
.hero-content { max-width: 600px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px; background: rgba(255,255,255,0.12); backdrop-filter: blur(8px); border: 1px solid rgba(255,255,255,0.15); border-radius: 100px; font-size: 0.85rem; color: rgba(255,255,255,0.85); margin-bottom: 24px; }
.hero-badge i { color: var(--accent); font-size: 0.75rem; }
.hero h1 { font-size: 3.5rem; font-weight: 900; line-height: 1.1; color: #fff; letter-spacing: -0.03em; margin-bottom: 20px; }
.hero h1 .highlight { background: linear-gradient(135deg, var(--accent-light), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { font-size: 1.2rem; color: rgba(255,255,255,0.75); line-height: 1.8; margin-bottom: 32px; max-width: 520px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.hero-actions .btn-primary { padding: 16px 36px; background: var(--accent); color: #111; font-weight: 700; font-size: 1.05rem; border-radius: var(--radius); display: inline-flex; align-items: center; gap: 10px; transition: var(--transition); }
.hero-actions .btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 12px 30px rgba(245,158,11,0.35); }
.hero-actions .btn-outline { padding: 16px 36px; background: transparent; color: #fff; font-weight: 600; font-size: 1.05rem; border: 2px solid rgba(255,255,255,0.3); border-radius: var(--radius); display: inline-flex; align-items: center; gap: 10px; transition: var(--transition); }
.hero-actions .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.5); transform: translateY(-2px); }
.hero-image { position: relative; display: flex; justify-content: center; align-items: center; }
.hero-image img { width: 100%; max-width: 520px; border-radius: var(--radius-xl); box-shadow: var(--shadow-xl); transform: perspective(800px) rotateY(-6deg) rotateX(2deg); transition: var(--transition); }
.hero-image img:hover { transform: perspective(800px) rotateY(0deg) rotateX(0deg); }
.hero-stats { display: flex; gap: 32px; margin-top: 40px; }
.hero-stats .stat h3 { font-size: 1.8rem; font-weight: 800; color: #fff; line-height: 1.2; }
.hero-stats .stat p { font-size: 0.9rem; color: rgba(255,255,255,0.6); margin-bottom: 0; }
@media (max-width: 1024px) { .hero .container { grid-template-columns: 1fr; text-align: center; gap: 40px; } .hero-content { max-width: 100%; } .hero p { margin: 0 auto 32px; } .hero-actions { justify-content: center; } .hero-stats { justify-content: center; } .hero h1 { font-size: 2.8rem; } .hero-image img { max-width: 400px; transform: none; } }
@media (max-width: 768px) { .hero h1 { font-size: 2.2rem; } .hero p { font-size: 1.05rem; } .hero-stats { gap: 20px; flex-wrap: wrap; } .hero-stats .stat h3 { font-size: 1.5rem; } }

/* Features */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card { background: #fff; border-radius: var(--radius-lg); padding: 36px 28px; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.feature-card .icon { width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; background: rgba(26,86,219,0.08); border-radius: var(--radius); font-size: 1.5rem; color: var(--primary); margin-bottom: 20px; }
.feature-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }
@media (max-width: 768px) { .features-grid { grid-template-columns: 1fr; } }

/* Category Section */
.category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.category-card { display: flex; align-items: center; gap: 24px; background: #fff; border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); }
.category-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.category-card .cat-icon { width: 64px; height: 64px; flex-shrink: 0; border-radius: var(--radius); display: flex; align-items: center; justify-content: center; font-size: 1.8rem; color: #fff; }
.category-card .cat-icon.blue { background: linear-gradient(135deg, var(--primary), var(--primary-light)); }
.category-card .cat-icon.amber { background: linear-gradient(135deg, var(--accent), var(--accent-light)); }
.category-card .cat-info h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
.category-card .cat-info p { color: var(--text-secondary); font-size: 0.9rem; margin: 0; }
.category-card .cat-arrow { margin-left: auto; font-size: 1.2rem; color: var(--text-light); transition: var(--transition); }
.category-card:hover .cat-arrow { color: var(--accent); transform: translateX(4px); }
@media (max-width: 768px) { .category-grid { grid-template-columns: 1fr; } }

/* Latest Posts */
.posts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.post-card { background: #fff; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); display: flex; flex-direction: column; }
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.post-card .post-img { width: 100%; height: 200px; object-fit: cover; }
.post-card .post-body { padding: 20px 24px 24px; flex: 1; display: flex; flex-direction: column; }
.post-card .post-cat { display: inline-block; padding: 4px 12px; background: rgba(26,86,219,0.08); color: var(--primary); font-size: 0.8rem; font-weight: 600; border-radius: 100px; margin-bottom: 10px; align-self: flex-start; }
.post-card .post-cat.amber { background: rgba(245,158,11,0.12); color: var(--accent-dark); }
.post-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; flex: 1; }
.post-card h3 a { color: var(--text); }
.post-card h3 a:hover { color: var(--primary); }
.post-card .post-meta { display: flex; align-items: center; gap: 16px; font-size: 0.85rem; color: var(--text-light); margin-top: 12px; }
.post-card .post-meta i { margin-right: 4px; }
.post-empty { grid-column: 1 / -1; text-align: center; padding: 48px 24px; color: var(--text-secondary); background: #fff; border-radius: var(--radius-lg); border: 1px dashed var(--border); }
.post-empty i { font-size: 2.5rem; color: var(--text-light); margin-bottom: 16px; display: block; }
@media (max-width: 1024px) { .posts-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .posts-grid { grid-template-columns: 1fr; } }

/* Stats Counter */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card { text-align: center; padding: 36px 20px; background: rgba(255,255,255,0.06); border-radius: var(--radius-lg); border: 1px solid rgba(255,255,255,0.08); transition: var(--transition); }
.stat-card:hover { background: rgba(255,255,255,0.10); transform: translateY(-2px); }
.stat-card .num { font-size: 2.8rem; font-weight: 900; color: var(--accent); line-height: 1.2; margin-bottom: 6px; }
.stat-card .label { font-size: 1rem; color: rgba(255,255,255,0.7); }
@media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }

/* Process Steps */
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.process-steps::before { content: ''; position: absolute; top: 40px; left: 10%; right: 10%; height: 2px; background: linear-gradient(to right, var(--primary-light), var(--accent-light)); z-index: 0; }
.step-card { text-align: center; position: relative; z-index: 1; background: #fff; padding: 32px 20px; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); }
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.step-card .step-num { width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; border-radius: 50%; font-size: 1.2rem; font-weight: 800; color: #fff; background: var(--primary); }
.step-card:nth-child(2) .step-num { background: var(--accent); }
.step-card:nth-child(3) .step-num { background: #10b981; }
.step-card:nth-child(4) .step-num { background: #8b5cf6; }
.step-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.step-card p { color: var(--text-secondary); font-size: 0.9rem; margin: 0; }
@media (max-width: 768px) { .process-steps { grid-template-columns: repeat(2, 1fr); } .process-steps::before { display: none; } }
@media (max-width: 520px) { .process-steps { grid-template-columns: 1fr; } }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: #fff; border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: var(--primary-light); }
.faq-item .faq-q { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; font-weight: 600; font-size: 1.05rem; cursor: pointer; transition: var(--transition); user-select: none; }
.faq-item .faq-q i { color: var(--text-light); transition: var(--transition); font-size: 0.9rem; }
.faq-item.active .faq-q i { transform: rotate(180deg); color: var(--primary); }
.faq-item .faq-a { max-height: 0; overflow: hidden; transition: max-height 0.45s ease, padding 0.3s ease; padding: 0 24px; color: var(--text-secondary); line-height: 1.8; font-size: 0.95rem; }
.faq-item.active .faq-a { max-height: 300px; padding: 0 24px 20px; }

/* CTA */
.cta-box { background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%); border-radius: var(--radius-xl); padding: 64px 48px; text-align: center; position: relative; overflow: hidden; }
.cta-box::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity: 0.08; mix-blend-mode: overlay; }
.cta-box h2 { font-size: 2.2rem; font-weight: 800; color: #fff; margin-bottom: 16px; position: relative; }
.cta-box p { font-size: 1.1rem; color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 32px; position: relative; }
.cta-box .btn-cta { display: inline-flex; align-items: center; gap: 10px; padding: 18px 44px; background: #fff; color: var(--primary); font-weight: 700; font-size: 1.1rem; border-radius: var(--radius); transition: var(--transition); position: relative; }
.cta-box .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0,0,0,0.2); }
@media (max-width: 768px) { .cta-box { padding: 40px 24px; } .cta-box h2 { font-size: 1.6rem; } }

/* Footer */
.footer { background: var(--bg-dark); color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 0.95rem; line-height: 1.8; max-width: 360px; }
.footer h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 18px; }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { color: rgba(255,255,255,0.6); font-size: 0.95rem; transition: var(--transition); display: inline-flex; align-items: center; gap: 6px; }
.footer ul li a:hover { color: var(--accent); transform: translateX(2px); }
.footer-bottom { padding: 24px 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.9rem; }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent); }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } .footer-bottom { flex-direction: column; text-align: center; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

/* Breadcrumb */
.breadcrumb { display: flex; align-items: center; gap: 8px; padding: 16px 0; font-size: 0.9rem; color: var(--text-secondary); flex-wrap: wrap; }
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--text-light); font-size: 0.7rem; }

/* Page Banner */
.page-banner { background: linear-gradient(135deg, #0f172a, #1e3a5f); padding: 120px 0 60px; position: relative; overflow: hidden; }
.page-banner::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.png') center/cover no-repeat; opacity: 0.1; mix-blend-mode: overlay; }
.page-banner h1 { font-size: 2.5rem; font-weight: 800; color: #fff; position: relative; }
.page-banner p { color: rgba(255,255,255,0.7); font-size: 1.1rem; margin-top: 12px; position: relative; max-width: 600px; }
@media (max-width: 768px) { .page-banner { padding: 100px 0 40px; } .page-banner h1 { font-size: 1.8rem; } }

/* Article Detail */
.article-detail { max-width: 800px; margin: 0 auto; }
.article-detail .meta { display: flex; flex-wrap: wrap; gap: 20px; color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 32px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
.article-detail .meta i { margin-right: 6px; }
.article-detail .content { font-size: 1.05rem; line-height: 2; color: var(--text); }
.article-detail .content p { margin-bottom: 20px; }
.article-detail .content h2 { font-size: 1.5rem; font-weight: 700; margin: 36px 0 16px; }
.article-detail .content h3 { font-size: 1.2rem; font-weight: 600; margin: 28px 0 12px; }
.article-detail .content ul, .article-detail .content ol { margin: 16px 0 16px 24px; }
.article-detail .content li { margin-bottom: 8px; }
.article-detail .content img { border-radius: var(--radius); margin: 24px 0; }
.article-notfound { text-align: center; padding: 80px 24px; }
.article-notfound i { font-size: 3rem; color: var(--text-light); margin-bottom: 16px; }
.article-notfound h2 { font-size: 1.6rem; margin-bottom: 12px; }
.article-notfound p { color: var(--text-secondary); }

/* Card list for category page */
.resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.resource-card { background: #fff; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); }
.resource-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.resource-card .rc-img { width: 100%; height: 180px; object-fit: cover; }
.resource-card .rc-body { padding: 20px 24px 24px; }
.resource-card .rc-body h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.resource-card .rc-body h3 a { color: var(--text); }
.resource-card .rc-body h3 a:hover { color: var(--primary); }
.resource-card .rc-body p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; margin-bottom: 12px; }
.resource-card .rc-tag { display: inline-block; padding: 4px 12px; background: rgba(26,86,219,0.08); color: var(--primary); font-size: 0.8rem; font-weight: 600; border-radius: 100px; }
@media (max-width: 1024px) { .resource-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .resource-grid { grid-template-columns: 1fr; } }

/* Responsive extras */
@media (max-width: 480px) { .hero h1 { font-size: 1.8rem; } .section-title { font-size: 1.6rem; } .hero-actions .btn-primary, .hero-actions .btn-outline { padding: 14px 24px; font-size: 0.95rem; width: 100%; justify-content: center; } }

/* roulang page: article */
:root {
  --primary: #6c5ce7;
  --primary-dark: #5a4bd1;
  --primary-light: #a29bfe;
  --accent: #fd79a8;
  --accent-dark: #e84393;
  --bg: #f8f9fa;
  --bg-card: #ffffff;
  --bg-dark: #2d3436;
  --text: #2d3436;
  --text-light: #636e72;
  --text-lighter: #b2bec3;
  --border: #dfe6e9;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-glass: 0 8px 32px rgba(0,0,0,0.08);
  --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --max-width: 1200px;
  --header-h: 72px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  padding-top: var(--header-h);
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }

/* Header & Nav */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-h);
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(108,92,231,0.10);
  box-shadow: 0 1px 12px rgba(0,0,0,0.04);
  transition: var(--transition);
}
.header.scrolled { background: rgba(255,255,255,0.96); box-shadow: 0 4px 20px rgba(0,0,0,0.08); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 700; color: var(--primary); letter-spacing: -0.3px; }
.logo i { font-size: 1.6rem; background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.logo:hover { color: var(--primary-dark); transform: scale(1.02); }
.nav-list { display: flex; align-items: center; gap: 6px; }
.nav-list li a {
  display: flex; align-items: center; gap: 6px; padding: 8px 18px; border-radius: 50px;
  font-size: 0.9rem; font-weight: 500; color: var(--text); transition: var(--transition);
  white-space: nowrap;
}
.nav-list li a i { font-size: 0.85rem; opacity: 0.7; }
.nav-list li a:hover { background: rgba(108,92,231,0.08); color: var(--primary); }
.nav-list li a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(108,92,231,0.35); }
.nav-list li a.active i { opacity: 1; }
.nav-list li a.nav-cta { background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; padding: 8px 22px; box-shadow: 0 4px 14px rgba(108,92,231,0.3); }
.nav-list li a.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(108,92,231,0.4); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; background: none; border: none; }
.hamburger span { width: 26px; height: 2.5px; background: var(--text); border-radius: 4px; transition: var(--transition); }
@media (max-width: 900px) {
  .hamburger { display: flex; }
  .nav-list { position: fixed; top: var(--header-h); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); flex-direction: column; padding: 16px 24px 24px; gap: 4px; border-bottom: 1px solid var(--border); transform: translateY(-120%); opacity: 0; pointer-events: none; transition: var(--transition); box-shadow: 0 20px 40px rgba(0,0,0,0.08); }
  .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-list li a { width: 100%; justify-content: center; padding: 12px 18px; }
}

/* Article Banner */
.article-banner {
  position: relative;
  background: linear-gradient(135deg, rgba(108,92,231,0.12) 0%, rgba(253,121,168,0.08) 100%);
  padding: 60px 0 40px;
  overflow: hidden;
}
.article-banner::before {
  content: '';
  position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.08;
  pointer-events: none;
}
.article-banner .container { position: relative; z-index: 1; }
.article-breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-light); margin-bottom: 16px; flex-wrap: wrap; }
.article-breadcrumb a { color: var(--text-light); }
.article-breadcrumb a:hover { color: var(--primary); }
.article-breadcrumb span { color: var(--text-lighter); }
.article-category {
  display: inline-block; padding: 4px 16px; border-radius: 50px;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  color: #fff; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.article-banner h1 {
  font-size: 2.4rem; font-weight: 800; line-height: 1.3;
  color: var(--text); max-width: 800px;
  letter-spacing: -0.5px;
}
.article-meta {
  display: flex; align-items: center; gap: 20px; margin-top: 16px;
  font-size: 0.9rem; color: var(--text-light); flex-wrap: wrap;
}
.article-meta i { margin-right: 6px; color: var(--primary-light); }
@media (max-width: 768px) {
  .article-banner { padding: 40px 0 28px; }
  .article-banner h1 { font-size: 1.6rem; }
  .article-meta { gap: 12px; font-size: 0.8rem; }
}

/* Main Content */
.article-main { padding: 48px 0 60px; }
.article-layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: start; }
.article-content {
  background: var(--bg-card); border-radius: var(--radius);
  padding: 40px 44px; box-shadow: var(--shadow);
  border: 1px solid rgba(108,92,231,0.05);
}
.article-content .featured-image {
  width: 100%; border-radius: var(--radius-sm); margin-bottom: 28px;
  object-fit: cover; max-height: 420px; background: var(--border);
}
.article-body { font-size: 1.05rem; line-height: 1.9; color: var(--text); }
.article-body p { margin-bottom: 1.4em; }
.article-body h2 { font-size: 1.5rem; font-weight: 700; margin-top: 2em; margin-bottom: 0.8em; padding-bottom: 8px; border-bottom: 2px solid rgba(108,92,231,0.12); }
.article-body h3 { font-size: 1.2rem; font-weight: 600; margin-top: 1.6em; margin-bottom: 0.6em; }
.article-body ul, .article-body ol { padding-left: 1.6em; margin-bottom: 1.4em; }
.article-body li { margin-bottom: 0.4em; list-style: disc; }
.article-body ol li { list-style: decimal; }
.article-body blockquote {
  border-left: 4px solid var(--primary); padding: 16px 20px; margin: 1.4em 0;
  background: rgba(108,92,231,0.04); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-light); font-style: italic;
}
.article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-body img { border-radius: var(--radius-sm); margin: 1.4em 0; box-shadow: var(--shadow); }
.article-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--border); }
.article-tags .tag { padding: 4px 14px; border-radius: 50px; background: rgba(108,92,231,0.06); color: var(--primary); font-size: 0.8rem; font-weight: 500; border: 1px solid rgba(108,92,231,0.12); transition: var(--transition); }
.article-tags .tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.article-nav-links { display: flex; justify-content: space-between; margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--border); gap: 16px; flex-wrap: wrap; }
.article-nav-links a { padding: 10px 20px; border-radius: 50px; background: rgba(108,92,231,0.06); border: 1px solid var(--border); font-size: 0.9rem; transition: var(--transition); display: flex; align-items: center; gap: 8px; }
.article-nav-links a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Sidebar */
.article-sidebar { display: flex; flex-direction: column; gap: 28px; }
.sidebar-card { background: var(--bg-card); border-radius: var(--radius); padding: 24px 28px; box-shadow: var(--shadow); border: 1px solid rgba(108,92,231,0.05); }
.sidebar-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; color: var(--text); }
.sidebar-card h3 i { color: var(--primary); }
.sidebar-list li { padding: 10px 0; border-bottom: 1px solid var(--border); }
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list li a { display: flex; gap: 12px; align-items: flex-start; color: var(--text); transition: var(--transition); }
.sidebar-list li a:hover { color: var(--primary); }
.sidebar-list li a img { width: 60px; height: 60px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; background: var(--border); }
.sidebar-list li a .info { flex: 1; }
.sidebar-list li a .info .title { font-size: 0.9rem; font-weight: 600; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.4; }
.sidebar-list li a .info .date { font-size: 0.75rem; color: var(--text-lighter); margin-top: 4px; }
.sidebar-cta { background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; border: none; }
.sidebar-cta h3, .sidebar-cta p { color: #fff; }
.sidebar-cta h3 i { color: rgba(255,255,255,0.8); }
.sidebar-cta p { font-size: 0.9rem; opacity: 0.9; margin-bottom: 16px; }
.sidebar-cta .btn { background: #fff; color: var(--primary); border: none; width: 100%; justify-content: center; }
.sidebar-cta .btn:hover { background: rgba(255,255,255,0.9); transform: translateY(-2px); }

/* Not Found */
.not-found { text-align: center; padding: 80px 20px; }
.not-found i { font-size: 4rem; color: var(--text-lighter); margin-bottom: 20px; }
.not-found h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.not-found p { color: var(--text-light); margin-bottom: 24px; }
.not-found .btn { display: inline-flex; align-items: center; gap: 8px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px;
  border-radius: 50px; font-weight: 600; font-size: 0.95rem; border: none; cursor: pointer;
  transition: var(--transition); text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(108,92,231,0.3); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(108,92,231,0.4); color: #fff; }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }

/* Footer */
.footer {
  background: var(--bg-dark); color: rgba(255,255,255,0.8); padding: 60px 0 0;
}
.footer .container:last-child { padding-bottom: 24px; }
.footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { color: #fff; margin-bottom: 12px; font-size: 1.2rem; }
.footer-brand .logo i { -webkit-text-fill-color: currentColor; background: none; color: var(--accent); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; opacity: 0.7; max-width: 320px; }
.footer h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; letter-spacing: 0.3px; }
.footer ul li { margin-bottom: 8px; }
.footer ul li a { color: rgba(255,255,255,0.6); font-size: 0.88rem; display: flex; align-items: center; gap: 8px; transition: var(--transition); }
.footer ul li a:hover { color: var(--primary-light); transform: translateX(4px); }
.footer ul li a i { font-size: 0.75rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06); padding: 20px 0; margin-top: 8px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  font-size: 0.82rem; opacity: 0.6;
}
.footer-bottom a { color: rgba(255,255,255,0.7); }
.footer-bottom a:hover { color: #fff; }
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* Responsive Article Layout */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .article-content { padding: 24px 20px; }
  .article-body { font-size: 1rem; }
}
@media (max-width: 520px) {
  .article-content { padding: 16px; }
  .article-banner h1 { font-size: 1.3rem; }
}

/* Error state */
.content-error { text-align: center; padding: 60px 20px; }
.content-error i { font-size: 3rem; color: var(--text-lighter); margin-bottom: 16px; }
.content-error h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 8px; }
.content-error p { color: var(--text-light); margin-bottom: 20px; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
:root {
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --primary-bg: #eff6ff;
  --secondary: #f59e0b;
  --secondary-light: #fbbf24;
  --secondary-dark: #d97706;
  --accent: #10b981;
  --accent-light: #34d399;
  --bg: #f8fafc;
  --bg-white: #ffffff;
  --bg-card: #ffffff;
  --text: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.12);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 2px; }
button, input, textarea, select { font-family: inherit; font-size: inherit; line-height: inherit; }
button { cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { color: var(--text); font-weight: 700; line-height: 1.3; letter-spacing: -0.01em; }
h1 { font-size: 2.8rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }
p { margin-bottom: 0.75rem; }
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 80px 0; }
.section-alt { background: var(--bg-white); }
.section-title {
  text-align: center;
  margin-bottom: 16px;
  font-size: 2.2rem;
  color: var(--text);
}
.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 680px;
  margin: 0 auto 48px;
  line-height: 1.7;
}
.section-header { margin-bottom: 48px; }
.text-center { text-align: center; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-48 { margin-bottom: 48px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff !important;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.30);
}
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: var(--secondary);
  color: #fff !important;
  border-color: var(--secondary);
}
.btn-secondary:hover {
  background: var(--secondary-dark);
  border-color: var(--secondary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.30);
}
.btn-outline {
  background: transparent;
  color: var(--primary) !important;
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.20);
}
.btn-lg { padding: 16px 40px; font-size: 1.05rem; border-radius: var(--radius-md); }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; border-radius: 6px; }
.btn .fa, .btn .fas, .btn .far { font-size: 0.9em; }

/* ===== Badge ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--primary-bg);
  color: var(--primary);
  border: 1px solid rgba(37, 99, 235, 0.15);
}
.badge-hot { background: #fef2f2; color: #dc2626; border-color: rgba(220, 38, 38, 0.15); }
.badge-new { background: #ecfdf5; color: var(--accent); border-color: rgba(16, 185, 129, 0.15); }
.badge-top { background: #fffbeb; color: var(--secondary-dark); border-color: rgba(217, 119, 6, 0.15); }

/* ===== Tags ===== */
.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--bg);
  color: var(--text-muted);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.tag:hover { background: var(--primary-bg); color: var(--primary); border-color: var(--primary); }

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all var(--transition);
  overflow: hidden;
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; border-radius: var(--radius-md) var(--radius-md) 0 0; }
.card-body { padding: 24px; }
.card-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.card-text { font-size: 0.95rem; color: var(--text-muted); line-height: 1.6; }

/* ===== Grid ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
.grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; }

/* ===== Glass Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255,255,255,0.65);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  transition: background var(--transition), box-shadow var(--transition);
}
.header.scrolled {
  background: rgba(255,255,255,0.92);
  box-shadow: 0 1px 20px rgba(0,0,0,0.08);
}
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text) !important;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.logo i { color: var(--primary); font-size: 1.5rem; }
.logo:hover { color: var(--primary) !important; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-list li a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-body);
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-list li a i { font-size: 0.85rem; opacity: 0.7; }
.nav-list li a:hover { background: var(--primary-bg); color: var(--primary); }
.nav-list li a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(37,99,235,0.25); }
.nav-list li a.active i { opacity: 1; }
.nav-list li a.nav-cta {
  background: var(--secondary);
  color: #fff !important;
  font-weight: 600;
  padding: 8px 22px;
  border-radius: 100px;
  box-shadow: 0 4px 16px rgba(245,158,11,0.25);
}
.nav-list li a.nav-cta:hover { background: var(--secondary-dark); transform: translateY(-2px); box-shadow: 0 6px 24px rgba(245,158,11,0.35); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
}
.hamburger span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--text);
  border-radius: 4px;
  transition: all var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(37,99,235,0.20) 0%, transparent 70%);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 20px;
  border-radius: 100px;
  background: rgba(255,255,255,0.10);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.85);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 24px;
}
.hero h1 { color: #fff; font-size: 3.2rem; font-weight: 800; line-height: 1.2; margin-bottom: 20px; }
.hero h1 span { background: linear-gradient(135deg, var(--secondary), #f97316); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { color: rgba(255,255,255,0.75); font-size: 1.15rem; max-width: 640px; margin: 0 auto 32px; line-height: 1.8; }
.hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.hero-search {
  margin-top: 32px;
  display: flex;
  justify-content: center;
}
.hero-search-box {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.10);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 100px;
  padding: 4px 4px 4px 20px;
  max-width: 480px;
  width: 100%;
}
.hero-search-box input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 12px 0;
  color: #fff;
  font-size: 0.95rem;
  outline: none;
  min-width: 0;
}
.hero-search-box input::placeholder { color: rgba(255,255,255,0.45); }
.hero-search-box button {
  padding: 10px 24px;
  border-radius: 100px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  transition: all var(--transition);
}
.hero-search-box button:hover { background: var(--primary-dark); }

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 16px 0;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--text); font-weight: 500; }
.breadcrumb .sep { margin: 0 8px; color: var(--border); }

/* ===== Subcategory Grid ===== */
.subcategory-card {
  padding: 32px 24px;
  text-align: center;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all var(--transition);
  cursor: default;
}
.subcategory-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: var(--primary-light); }
.subcategory-card .icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 1.8rem;
  color: #fff;
  background: var(--primary);
}
.subcategory-card h4 { font-size: 1.1rem; margin-bottom: 8px; }
.subcategory-card p { font-size: 0.9rem; color: var(--text-muted); margin: 0; }

/* ===== Featured Guides ===== */
.guide-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all var(--transition);
}
.guide-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.guide-card .card-top { position: relative; overflow: hidden; }
.guide-card .card-top img { width: 100%; aspect-ratio: 16/10; object-fit: cover; transition: transform 0.4s ease; }
.guide-card:hover .card-top img { transform: scale(1.05); }
.guide-card .card-badge { position: absolute; top: 12px; left: 12px; }
.guide-card .card-bottom { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.guide-card .card-bottom .meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--text-light); margin-bottom: 8px; }
.guide-card .card-bottom h4 { font-size: 1.05rem; margin-bottom: 6px; }
.guide-card .card-bottom h4 a { color: var(--text); }
.guide-card .card-bottom h4 a:hover { color: var(--primary); }
.guide-card .card-bottom p { font-size: 0.9rem; color: var(--text-muted); flex: 1; }
.guide-card .card-bottom .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }

/* ===== Resources List ===== */
.resource-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: all var(--transition);
  margin-bottom: 12px;
}
.resource-item:hover { box-shadow: var(--shadow-sm); border-color: var(--primary-light); transform: translateX(4px); }
.resource-item .r-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 1.3rem;
  flex-shrink: 0;
}
.resource-item .r-content { flex: 1; }
.resource-item .r-content h5 { font-size: 1rem; margin-bottom: 2px; }
.resource-item .r-content p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }
.resource-item .r-action { flex-shrink: 0; }

/* ===== Steps / Process ===== */
.steps-grid { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; counter-reset: step; }
.step-card {
  text-align: center;
  padding: 32px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  position: relative;
  transition: all var(--transition);
}
.step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.step-card .step-num {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
}
.step-card h4 { font-size: 1.05rem; margin-bottom: 8px; }
.step-card p { font-size: 0.9rem; color: var(--text-muted); margin: 0; }

/* ===== FAQ ===== */
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--transition);
  background: var(--bg-card);
}
.faq-item:hover { border-color: var(--primary-light); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  cursor: pointer;
  background: none;
  width: 100%;
  text-align: left;
  border: none;
  gap: 16px;
  transition: background var(--transition);
}
.faq-question:hover { background: var(--bg); }
.faq-question i { transition: transform var(--transition); color: var(--primary); font-size: 0.85rem; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
}
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 20px; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.08;
  z-index: 0;
}
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 { color: #fff; font-size: 2.2rem; margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,0.8); font-size: 1.1rem; max-width: 560px; margin: 0 auto 32px; }
.cta-section .btn { background: #fff; color: var(--primary) !important; border-color: #fff; }
.cta-section .btn:hover { background: var(--secondary); color: #fff !important; border-color: var(--secondary); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,0,0,0.20); }

/* ===== Footer ===== */
.footer {
  background: #0f172a;
  color: rgba(255,255,255,0.7);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo { color: #fff !important; font-size: 1.2rem; margin-bottom: 16px; display: inline-flex; }
.footer-brand .logo i { color: var(--secondary); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.55); margin-top: 16px; }
.footer h4 { color: #fff; font-size: 1rem; margin-bottom: 20px; font-weight: 600; }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: all var(--transition); display: inline-flex; align-items: center; gap: 8px; }
.footer ul li a:hover { color: var(--secondary); padding-left: 4px; }
.footer ul li a i { color: var(--secondary); font-size: 0.75rem; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--secondary); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: 1fr 1fr; gap: 20px; }
  .steps-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.8rem; }
  .hero h1 { font-size: 2.6rem; }
}

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-list {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px 24px;
    gap: 4px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.12);
    transform: translateY(-120%);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    border-bottom: 1px solid var(--border);
  }
  .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-list li a { width: 100%; justify-content: flex-start; padding: 12px 16px; font-size: 1rem; }
  .nav-list li a.nav-cta { justify-content: center; margin-top: 8px; }
  .hero { min-height: 60vh; padding: 100px 20px 60px; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; gap: 20px; }
  .grid-4 { grid-template-columns: 1fr 1fr; gap: 16px; }
  .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .section { padding: 48px 0; }
  .section-title { font-size: 1.7rem; }
  .section-subtitle { font-size: 0.95rem; margin-bottom: 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .resource-item { flex-wrap: wrap; }
  .resource-item .r-action { width: 100%; }
  .cta-section h2 { font-size: 1.7rem; }
}

@media (max-width: 520px) {
  .grid-4 { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.6rem; }
  .hero-badge { font-size: 0.75rem; padding: 4px 14px; }
  .hero-search-box { flex-direction: column; border-radius: var(--radius-md); padding: 12px; gap: 8px; }
  .hero-search-box input { width: 100%; padding: 8px 0; }
  .hero-search-box button { width: 100%; justify-content: center; }
  .container { padding: 0 16px; }
  .btn-lg { padding: 14px 28px; font-size: 0.95rem; }
  .faq-question { padding: 14px 16px; font-size: 0.9rem; }
  .faq-answer { font-size: 0.9rem; }
}