/* roulang page: index */
:root {
            --primary: #ff4757;
            --dark: #1a1a1a;
            --light: #ffffff;
            --gray: #f4f4f4;
            --accent: #2f3542;
            --radius: 12px;
            --shadow: 0 4px 20px rgba(0,0,0,0.1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', sans-serif; line-height: 1.6; color: var(--dark); background-color: var(--light); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: var(--dark); color: var(--light); padding: 15px 0; }
        nav ul { display: flex; list-style: none; gap: 20px; align-items: center; }
        nav a { color: var(--light); text-decoration: none; font-weight: 600; padding: 5px 10px; border-radius: 6px; }
        nav a:hover, nav a.active { background: 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-1.webp') center/cover; color: var(--light); text-align: center; }
        .section-title { text-align: center; margin: 50px 0; font-size: 2.5rem; }
        .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 30px; }
        .card { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: transform 0.3s; background: var(--light); }
        .card:hover { transform: translateY(-10px); }
        .card img { width: 100%; height: 180px; object-fit: cover; }
        .card-body { padding: 15px; }
        footer { background: var(--dark); color: #ccc; text-align: center; padding: 40px 0; margin-top: 60px; }
        .btn { display: inline-block; padding: 12px 30px; background: var(--primary); color: #fff; text-decoration: none; border-radius: 30px; margin-top: 20px; }

/* roulang page: category1 */
:root {
            --primary: #e63946;
            --dark: #1d3557;
            --light: #f1faee;
            --text: #333;
            --accent: #a8dadc;
            --radius: 12px;
            --shadow: 0 4px 6px rgba(0,0,0,0.1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'Helvetica Neue', Arial, sans-serif; line-height: 1.6; color: var(--text); background: #fdfdfd; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        header { background: #fff; padding: 20px 0; border-bottom: 2px solid var(--light); position: sticky; top: 0; z-index: 1000; }
        header .container { display: flex; justify-content: space-between; align-items: center; }
        .logo strong { font-size: 24px; color: var(--primary); }
        nav ul { display: flex; list-style: none; gap: 20px; }
        nav a { text-decoration: none; color: var(--dark); font-weight: 600; padding: 5px 10px; transition: 0.3s; }
        nav a.active { color: var(--primary); border-bottom: 2px solid var(--primary); }

        .banner { background: url('/assets/images/backpic/back-1.webp') center/cover; padding: 80px 0; color: #fff; text-align: center; }
        .banner h1 { font-size: 48px; margin-bottom: 15px; }

        .section { padding: 60px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
        .card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: 0.3s; }
        .card:hover { transform: translateY(-5px); }
        .card img { width: 100%; height: 200px; object-fit: cover; }
        .card-body { padding: 20px; }

        footer { background: var(--dark); color: #fff; padding: 40px 0; text-align: center; margin-top: 50px; }
        
        @media (max-width: 768px) { nav { display: none; } }

/* roulang page: article */
:root {
            --primary-color: #e63946;
            --secondary-color: #1d3557;
            --bg-color: #f8f9fa;
            --text-color: #333;
            --light-text: #666;
            --border-radius: 12px;
            --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, "Helvetica Neue", sans-serif; line-height: 1.6; color: var(--text-color); background: var(--bg-color); }
        .container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
        header { background: #fff; padding: 20px 0; border-bottom: 2px solid var(--primary-color); position: sticky; top: 0; z-index: 1000; }
        header .logo { font-size: 24px; font-weight: bold; color: var(--primary-color); }
        nav ul { display: flex; list-style: none; gap: 20px; }
        nav a { text-decoration: none; color: var(--secondary-color); font-weight: 500; padding: 8px 12px; border-radius: 6px; transition: 0.3s; }
        nav a:hover, nav a.active { background: var(--primary-color); color: #fff; }
        .main-content { padding: 40px 0; min-height: 60vh; }
        .article-card { background: #fff; padding: 40px; border-radius: var(--border-radius); box-shadow: var(--shadow); }
        h1 { color: var(--secondary-color); margin-bottom: 20px; line-height: 1.3; }
        .meta { color: var(--light-text); margin-bottom: 30px; font-size: 0.9em; }
        .content-body { line-height: 1.8; font-size: 1.1em; color: #444; }
        .content-body img { max-width: 100%; border-radius: 8px; margin: 20px 0; }
        footer { background: var(--secondary-color); color: #fff; text-align: center; padding: 40px 0; margin-top: 40px; }
        @media (max-width: 768px) { nav ul { flex-wrap: wrap; justify-content: center; } }

/* roulang page: category2 */
:root {
            --primary: #e11d48;
            --dark: #0f172a;
            --light: #f8fafc;
            --gray: #64748b;
            --border: #e2e8f0;
            --radius: 12px;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--light); color: var(--dark); line-height: 1.6; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: #fff; border-bottom: 1px solid var(--border); padding: 15px 0; position: sticky; top: 0; z-index: 100; }
        .logo { font-size: 1.5rem; font-weight: 800; color: var(--primary); }
        nav ul { display: flex; list-style: none; gap: 20px; }
        nav a { text-decoration: none; color: var(--dark); font-weight: 500; transition: color 0.3s; }
        nav a.active { color: var(--primary); }
        
        .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-2.webp') center/cover; color: #fff; border-radius: 0 0 40px 40px; }
        .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: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: 0 4px 6px rgba(0,0,0,0.05); transition: transform 0.3s; }
        .card:hover { transform: translateY(-10px); }
        .card img { width: 100%; height: 180px; object-fit: cover; }
        .card-body { padding: 20px; }
        
        .faq { background: #fff; padding: 60px 0; margin-top: 40px; }
        .faq-item { margin-bottom: 20px; }
        
        footer { padding: 40px 0; text-align: center; color: var(--gray); font-size: 0.9rem; }
        @media (max-width: 768px) { .hero h1 { font-size: 2rem; } }

/* roulang page: category3 */
:root {
            --primary-color: #e11d48;
            --bg-color: #0f172a;
            --text-color: #f8fafc;
            --secondary-text: #94a3b8;
            --card-bg: #1e293b;
            --border-radius: 12px;
            --transition: all 0.3s ease;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background-color: var(--bg-color); color: var(--text-color); line-height: 1.6; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: rgba(15, 23, 42, 0.95); border-bottom: 1px solid #334155; padding: 15px 0; position: sticky; top: 0; z-index: 100; }
        .logo { font-size: 1.5rem; font-weight: bold; color: var(--primary-color); }
        nav ul { display: flex; list-style: none; gap: 20px; }
        nav a { color: var(--text-color); text-decoration: none; font-weight: 500; padding: 5px 10px; border-radius: 6px; }
        nav 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') no-repeat center/cover; }
        .hero h1 { font-size: 3rem; margin-bottom: 20px; }
        .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 30px; padding: 60px 0; }
        .card { background: var(--card-bg); border-radius: var(--border-radius); overflow: hidden; transition: var(--transition); border: 1px solid #334155; }
        .card:hover { transform: translateY(-10px); border-color: var(--primary-color); }
        .card img { width: 100%; height: 200px; object-fit: cover; }
        .card-body { padding: 20px; }
        .card-body h3 { margin-bottom: 10px; }
        footer { padding: 40px 0; border-top: 1px solid #334155; text-align: center; color: var(--secondary-text); }
        @media (max-width: 768px) { .hero h1 { font-size: 2rem; } }

/* roulang page: category4 */
:root {
            --primary-color: #ff3e3e;
            --secondary-color: #1a1a1a;
            --bg-color: #0f0f0f;
            --text-color: #ffffff;
            --gray-text: #a0a0a0;
            --card-bg: #1e1e1e;
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', 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: var(--secondary-color); padding: 20px 0; border-bottom: 2px solid var(--primary-color); }
        .logo { font-size: 24px; font-weight: bold; color: var(--primary-color); }
        nav ul { display: flex; list-style: none; gap: 20px; }
        nav a { color: var(--text-color); text-decoration: none; font-weight: 500; transition: var(--transition); }
        nav a:hover, nav a.active { color: var(--primary-color); }
        .hero { 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-2.webp') center/cover; }
        .hero h1 { font-size: 48px; margin-bottom: 20px; }
        .section-title { margin: 50px 0 30px; font-size: 32px; border-left: 4px solid var(--primary-color); padding-left: 15px; }
        .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 30px; }
        .card { background: var(--card-bg); border-radius: var(--radius); overflow: hidden; transition: var(--transition); }
        .card:hover { transform: translateY(-10px); }
        .card img { width: 100%; height: 180px; object-fit: cover; }
        .card-body { padding: 15px; }
        .card h3 { margin-bottom: 10px; font-size: 18px; }
        .btn { display: inline-block; padding: 10px 25px; background: var(--primary-color); color: #fff; border-radius: 5px; text-decoration: none; margin-top: 15px; }
        footer { background: var(--secondary-color); padding: 40px 0; text-align: center; margin-top: 60px; color: var(--gray-text); }
        @media (max-width: 768px) { nav ul { gap: 10px; font-size: 14px; } }

/* roulang page: category5 */
:root {
            --primary-color: #e63946;
            --secondary-color: #1d3557;
            --text-color: #333;
            --light-bg: #f8f9fa;
            --border-radius: 8px;
            --box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; line-height: 1.6; color: var(--text-color); background: #fff; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        /* Header & Nav */
        header { background: #fff; border-bottom: 1px solid #eee; padding: 20px 0; }
        .nav-inner { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 24px; font-weight: bold; color: var(--primary-color); }
        nav ul { display: flex; list-style: none; gap: 20px; }
        nav a { text-decoration: none; color: var(--secondary-color); font-weight: 500; transition: color 0.3s; }
        nav a:hover, nav a.active { color: var(--primary-color); }

        /* Hero */
        .hero-section { padding: 60px 0; background: linear-gradient(rgba(29, 53, 87, 0.8), rgba(29, 53, 87, 0.8)), url('/assets/images/backpic/back-3.webp') center/cover; color: #fff; text-align: center; }
        .hero-section h1 { font-size: 40px; margin-bottom: 20px; }

        /* Grid */
        .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 30px; padding: 60px 0; }
        .card { border: 1px solid #eee; border-radius: var(--border-radius); overflow: hidden; transition: transform 0.3s; }
        .card:hover { transform: translateY(-5px); box-shadow: var(--box-shadow); }
        .card img { width: 100%; height: 180px; object-fit: cover; }
        .card-body { padding: 15px; }

        /* FAQ */
        .faq-section { background: var(--light-bg); padding: 60px 0; }
        .faq-item { margin-bottom: 20px; background: #fff; padding: 20px; border-radius: var(--border-radius); }
        
        /* Footer */
        footer { padding: 40px 0; background: #333; color: #ccc; text-align: center; }
        
        @media (max-width: 768px) { nav ul { gap: 10px; font-size: 14px; } }