/* roulang page: index */
:root {
            --primary: #ff3e6c;
            --dark: #121212;
            --light: #ffffff;
            --gray: #f4f4f4;
            --text: #333;
            --radius: 12px;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', sans-serif; line-height: 1.6; color: var(--text); background: var(--gray); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: var(--dark); color: var(--light); padding: 20px 0; }
        nav { display: flex; align-items: center; justify-content: space-between; }
        .logo { font-size: 24px; font-weight: bold; color: var(--primary); }
        .nav-links { display: flex; gap: 20px; }
        .nav-links a { color: var(--light); text-decoration: none; font-size: 16px; }
        .hero { background: url('/assets/images/backpic/back-1.webp') center/cover; padding: 100px 0; text-align: center; color: var(--light); }
        .hero h1 { font-size: 48px; margin-bottom: 20px; }
        .btn { display: inline-block; padding: 12px 30px; background: var(--primary); color: var(--light); border-radius: var(--radius); text-decoration: none; margin-top: 20px; }
        .section { padding: 60px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 30px; }
        .card { background: var(--light); border-radius: var(--radius); overflow: hidden; box-shadow: 0 4px 10px rgba(0,0,0,0.1); }
        .card img { width: 100%; height: 180px; object-fit: cover; }
        .card-body { padding: 15px; }
        footer { background: var(--dark); color: #888; text-align: center; padding: 40px 0; }

/* roulang page: category1 */
:root {
            --primary-color: #e63946;
            --dark-bg: #0f172a;
            --card-bg: #1e293b;
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --radius: 12px;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--dark-bg); color: var(--text-main); line-height: 1.6; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        header { background: rgba(15, 23, 42, 0.95); padding: 20px 0; border-bottom: 1px solid #334155; position: sticky; top: 0; z-index: 100; }
        nav { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 24px; font-weight: bold; color: var(--primary-color); }
        .nav-links a { color: var(--text-main); text-decoration: none; margin-left: 20px; padding: 8px 12px; border-radius: var(--radius); transition: 0.3s; }
        .nav-links a:hover, .nav-links a.active { background: var(--primary-color); }
        
        .hero { padding: 80px 0; text-align: center; background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.8)), url('/assets/images/backpic/back-1.webp'); background-size: cover; }
        .hero h1 { font-size: 3rem; margin-bottom: 20px; }
        
        .content-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 30px; padding: 60px 0; }
        .card { background: var(--card-bg); border-radius: var(--radius); overflow: hidden; transition: 0.3s; }
        .card:hover { transform: translateY(-10px); }
        .card img { width: 100%; height: 180px; object-fit: cover; }
        .card-body { padding: 20px; }
        
        .faq { padding: 60px 0; background: #020617; }
        .faq-item { margin-bottom: 20px; }
        
        footer { padding: 40px 0; text-align: center; border-top: 1px solid #334155; color: var(--text-muted); }

/* roulang page: article */
:root {
            --primary: #ff3e3e;
            --dark: #1a1a1a;
            --light: #f4f4f4;
            --text: #333;
            --radius: 8px;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', sans-serif; background: #fff; color: var(--text); line-height: 1.6; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: var(--dark); color: #fff; padding: 20px 0; }
        nav { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 24px; font-weight: bold; color: var(--primary); }
        .nav-links a { color: #fff; margin-left: 20px; text-decoration: none; transition: 0.3s; }
        .nav-links a:hover { color: var(--primary); }
        .main-content { padding: 60px 0; min-height: 60vh; }
        .article-card { background: #fff; padding: 40px; border-radius: var(--radius); box-shadow: 0 10px 30px rgba(0,0,0,0.05); }
        h1 { margin-bottom: 20px; color: var(--dark); font-size: 32px; }
        .meta-info { color: #888; margin-bottom: 30px; font-size: 14px; }
        .content-body img { max-width: 100%; border-radius: var(--radius); margin: 20px 0; }
        footer { background: var(--dark); color: #999; text-align: center; padding: 40px 0; margin-top: 60px; }
        @media (max-width: 768px) { .nav-links { display: none; } }

/* roulang page: category2 */
:root {
            --primary-color: #ff3e3e;
            --secondary-color: #1a1a1a;
            --bg-color: #0f0f0f;
            --text-color: #ffffff;
            --text-muted: #a0a0a0;
            --container-width: 1200px;
            --border-radius: 8px;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { background-color: var(--bg-color); color: var(--text-color); font-family: "PingFang SC", "Microsoft YaHei", sans-serif; line-height: 1.6; }
        .container { max-width: var(--container-width); margin: 0 auto; padding: 0 20px; }
        header { background: #000; padding: 20px 0; border-bottom: 1px solid #333; }
        nav { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 24px; font-weight: bold; color: var(--primary-color); }
        .nav-links a { color: #fff; text-decoration: none; margin-left: 20px; transition: 0.3s; }
        .nav-links a:hover, .nav-links a.active { color: var(--primary-color); }
        .hero-inner { padding: 80px 0; text-align: center; background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('/assets/images/backpic/back-1.webp') center/cover; border-radius: var(--border-radius); margin: 20px 0; }
        .hero-inner h1 { font-size: 48px; margin-bottom: 20px; }
        .section-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 30px; padding: 40px 0; }
        .card { background: #1a1a1a; border-radius: var(--border-radius); overflow: hidden; transition: 0.3s; border: 1px solid #333; }
        .card:hover { transform: translateY(-5px); border-color: var(--primary-color); }
        .card img { width: 100%; height: 180px; object-fit: cover; }
        .card-content { padding: 15px; }
        .card-content h3 { margin-bottom: 10px; }
        .btn-cta { display: inline-block; padding: 12px 30px; background: var(--primary-color); color: #fff; text-decoration: none; border-radius: 5px; font-weight: bold; margin-top: 20px; }
        footer { background: #000; padding: 40px 0; text-align: center; color: var(--text-muted); border-top: 1px solid #333; }

/* roulang page: category3 */
:root {
            --primary-color: #ff3e3e;
            --secondary-color: #1a1a1a;
            --text-color: #333;
            --light-text: #666;
            --bg-color: #f8f9fa;
            --white: #ffffff;
            --border-radius: 12px;
            --shadow: 0 4px 20px rgba(0,0,0,0.1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; line-height: 1.6; color: var(--text-color); background: var(--bg-color); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        header { background: var(--secondary-color); color: var(--white); padding: 20px 0; }
        nav { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 24px; font-weight: bold; color: var(--primary-color); }
        .nav-links a { color: var(--white); text-decoration: none; margin-left: 20px; transition: color 0.3s; }
        .nav-links a.active { color: var(--primary-color); font-weight: bold; }
        
        .hero { padding: 80px 0; background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('/assets/images/backpic/back-3.webp') center/cover; color: var(--white); text-align: center; }
        .hero h1 { font-size: 48px; margin-bottom: 20px; }
        
        .content-section { padding: 60px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 30px; }
        .card { background: var(--white); border-radius: var(--border-radius); overflow: hidden; box-shadow: var(--shadow); transition: transform 0.3s; }
        .card:hover { transform: translateY(-10px); }
        .card img { width: 100%; height: 200px; object-fit: cover; }
        .card-body { padding: 20px; }
        
        .faq { padding: 60px 0; background: var(--white); }
        .cta { padding: 80px 0; background: var(--primary-color); color: var(--white); text-align: center; }
        .btn { display: inline-block; padding: 15px 30px; background: var(--secondary-color); color: var(--white); border-radius: 50px; text-decoration: none; font-weight: bold; margin-top: 20px; }
        
        footer { background: var(--secondary-color); color: var(--white); text-align: center; padding: 40px 0; }
        @media (max-width: 768px) { .nav-links { display: none; } }

/* roulang page: category4 */
:root {
            --primary: #ff4757;
            --dark: #1a1a1a;
            --light: #f4f4f4;
            --text: #333;
            --gray: #666;
            --radius: 8px;
            --shadow: 0 4px 6px rgba(0,0,0,0.1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; line-height: 1.6; color: var(--text); background: #fff; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: var(--dark); color: #fff; padding: 1rem 0; }
        nav { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 1.5rem; font-weight: bold; color: var(--primary); }
        .nav-links a { color: #fff; text-decoration: none; margin-left: 20px; padding: 5px 10px; transition: 0.3s; }
        .nav-links a:hover, .nav-links a.active { color: var(--primary); }
        
        .hero { padding: 80px 0; background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('/assets/images/backpic/back-2.webp') center/cover; color: #fff; text-align: center; }
        .hero h1 { font-size: 3rem; margin-bottom: 20px; }
        
        .section { padding: 60px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 30px; margin-top: 40px; }
        .card { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: 0.3s; }
        .card:hover { transform: translateY(-10px); }
        .card img { width: 100%; height: 180px; object-fit: cover; }
        .card-body { padding: 15px; }
        
        .faq { background: var(--light); padding: 60px 0; }
        .faq-item { margin-bottom: 20px; }
        .faq-item h3 { color: var(--primary); }
        
        footer { background: var(--dark); color: #999; text-align: center; padding: 40px 0; margin-top: 40px; }
        @media (max-width: 768px) { .nav-links { display: none; } }

/* roulang page: category5 */
:root {
            --primary-color: #ff3e3e;
            --secondary-color: #1a1a1a;
            --bg-color: #0f0f0f;
            --text-color: #ffffff;
            --text-muted: #a0a0a0;
            --accent-gradient: linear-gradient(135deg, #ff3e3e, #8b0000);
            --radius: 12px;
            --shadow: 0 4px 20px rgba(0,0,0,0.3);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--bg-color); color: var(--text-color); line-height: 1.6; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: #000; padding: 20px 0; border-bottom: 1px solid #333; }
        nav { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 24px; font-weight: bold; color: var(--primary-color); }
        .nav-links a { color: var(--text-color); text-decoration: none; margin-left: 20px; transition: color 0.3s; }
        .nav-links a:hover, .nav-links a.active { color: var(--primary-color); }
        .hero { padding: 80px 0; text-align: center; background: url('/assets/images/backpic/back-2.webp') center/cover; }
        .hero h1 { font-size: 3rem; margin-bottom: 20px; }
        .section { padding: 60px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 30px; }
        .card { background: var(--secondary-color); border-radius: var(--radius); overflow: hidden; transition: transform 0.3s; border: 1px solid #333; }
        .card:hover { transform: translateY(-10px); }
        .card img { width: 100%; height: 180px; object-fit: cover; }
        .card-body { padding: 20px; }
        .card-body h3 { margin-bottom: 10px; }
        .faq { background: #1a1a1a; padding: 40px; border-radius: var(--radius); margin-top: 40px; }
        .faq h2 { margin-bottom: 20px; }
        footer { padding: 40px 0; text-align: center; border-top: 1px solid #333; color: var(--text-muted); }
        @media (max-width: 768px) { .hero h1 { font-size: 2rem; } }