/* roulang page: index */
:root {--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #60a5fa;--accent: #f59e0b;--accent-dark: #d97706;--accent-light: #fbbf24;--bg-body: #f8fafc;--bg-card: #ffffff;--bg-dark: #0f172a;--bg-section: #f1f5f9;--text-primary: #1e293b;--text-secondary: #475569;--text-muted: #94a3b8;--text-inverse: #f8fafc;--border: #e2e8f0;--border-light: #f1f5f9;--radius-sm: 6px;--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 14px rgba(0,0,0,0.08);--shadow-lg: 0 10px 40px rgba(0,0,0,0.10);--shadow-xl: 0 20px 60px rgba(0,0,0,0.14);--space-xs: 8px;--space-sm: 16px;--space-md: 32px;--space-lg: 56px;--space-xl: 80px;--max-width: 1200px;--font-sans: 'Inter','Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;--transition: all 0.25s ease;}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--font-sans);background:var(--bg-body);color:var(--text-primary);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;}
a{color:var(--primary);text-decoration:none;transition:var(--transition);}
a:hover{color:var(--primary-dark);}
img{max-width:100%;height:auto;display:block;}
button,input,textarea{font-family:inherit;font-size:inherit;line-height:inherit;}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 var(--space-sm);}
@media(min-width:768px){.container{padding:0 var(--space-md);}}
.section{padding:var(--space-lg) 0;}
@media(min-width:768px){.section{padding:var(--space-xl) 0;}}
.section-label{display:inline-block;background:rgba(37,99,235,0.10);color:var(--primary);padding:4px 14px;border-radius:20px;font-size:14px;font-weight:600;letter-spacing:0.3px;margin-bottom:var(--space-sm);}
.section-title{font-size:28px;font-weight:800;color:var(--text-primary);line-height:1.25;margin-bottom:var(--space-xs);}
@media(min-width:768px){.section-title{font-size:36px;}}
.section-subtitle{font-size:16px;color:var(--text-secondary);max-width:680px;line-height:1.6;}
.text-center{text-align:center;}
.text-center .section-subtitle{margin-left:auto;margin-right:auto;}
.grid-2,.grid-3,.grid-4{display:grid;gap:var(--space-md);}
@media(min-width:768px){.grid-2{grid-template-columns:1fr 1fr;}.grid-3{grid-template-columns:1fr 1fr 1fr;}.grid-4{grid-template-columns:1fr 1fr 1fr 1fr;}}
.card{background:var(--bg-card);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);overflow:hidden;transition:var(--transition);}
.card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:var(--radius-sm);font-weight:600;font-size:15px;border:none;cursor:pointer;transition:var(--transition);text-align:center;line-height:1.4;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 4px 14px rgba(37,99,235,0.35);}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 4px 14px rgba(245,158,11,0.35);}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary);}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-1px);}
.btn-white{background:#fff;color:var(--primary);}
.btn-white:hover{background:#f1f5f9;color:var(--primary-dark);transform:translateY(-1px);}
.badge{display:inline-block;padding:2px 12px;border-radius:20px;font-size:12px;font-weight:600;background:rgba(37,99,235,0.10);color:var(--primary);}
.badge-accent{background:rgba(245,158,11,0.12);color:var(--accent-dark);}
.tag{display:inline-block;padding:4px 12px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;background:var(--bg-section);color:var(--text-secondary);margin-right:6px;margin-bottom:6px;transition:var(--transition);}
.tag:hover{background:var(--primary);color:#fff;}
/* Header */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.95);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);}
.header .container{display:flex;align-items:center;justify-content:space-between;height:64px;}
.logo{font-size:22px;font-weight:800;color:var(--text-primary);letter-spacing:-0.5px;display:flex;align-items:center;gap:8px;}
.logo i{color:var(--primary);font-size:24px;}
.logo span{background:linear-gradient(135deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.nav{display:flex;align-items:center;gap:4px;}
.nav a{padding:8px 18px;border-radius:var(--radius-sm);font-size:15px;font-weight:500;color:var(--text-secondary);transition:var(--transition);position:relative;}
.nav a:hover{color:var(--primary);background:rgba(37,99,235,0.06);}
.nav a.active{color:var(--primary);background:rgba(37,99,235,0.10);font-weight:600;}
.nav a.active::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:20px;height:3px;background:var(--primary);border-radius:2px;}
.nav-cta{padding:8px 20px !important;background:var(--primary);color:#fff !important;border-radius:var(--radius-sm) !important;font-weight:600 !important;}
.nav-cta:hover{background:var(--primary-dark) !important;color:#fff !important;transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,0.30) !important;}
.nav-toggle{display:none;background:none;border:none;font-size:24px;color:var(--text-primary);cursor:pointer;padding:4px;}
@media(max-width:768px){.nav-toggle{display:block;}.nav{display:none;position:absolute;top:64px;left:0;right:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);flex-direction:column;padding:var(--space-sm);border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg);}.nav.open{display:flex;}.nav a{width:100%;padding:12px 16px;}.nav a.active::after{display:none;}}
/* Hero */
.hero{position:relative;min-height:80vh;display:flex;align-items:center;background:var(--bg-dark);background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;background-blend-mode:overlay;overflow:hidden;}
.hero::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,23,42,0.82) 0%,rgba(15,23,42,0.50) 100%);}
.hero .container{position:relative;z-index:2;padding:var(--space-lg) var(--space-sm);}
@media(min-width:768px){.hero .container{padding:var(--space-xl) var(--space-md);}}
.hero-content{max-width:720px;}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,0.12);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);padding:6px 16px;border-radius:20px;font-size:14px;color:var(--text-inverse);margin-bottom:var(--space-md);border:1px solid rgba(255,255,255,0.15);}
.hero-badge i{color:var(--accent);}
.hero h1{font-size:36px;font-weight:900;color:var(--text-inverse);line-height:1.15;letter-spacing:-0.5px;margin-bottom:var(--space-sm);}
@media(min-width:768px){.hero h1{font-size:52px;}}
.hero p{font-size:17px;color:rgba(255,255,255,0.80);max-width:600px;line-height:1.7;margin-bottom:var(--space-md);}
@media(min-width:768px){.hero p{font-size:19px;}}
.hero-actions{display:flex;flex-wrap:wrap;gap:var(--space-sm);}
.hero-stats{display:flex;flex-wrap:wrap;gap:var(--space-lg);margin-top:var(--space-lg);padding-top:var(--space-md);border-top:1px solid rgba(255,255,255,0.12);}
.hero-stat{text-align:left;}
.hero-stat-num{font-size:28px;font-weight:900;color:var(--text-inverse);letter-spacing:-0.5px;}
@media(min-width:768px){.hero-stat-num{font-size:36px;}}
.hero-stat-label{font-size:14px;color:rgba(255,255,255,0.60);margin-top:2px;}
/* Features */
.features{background:var(--bg-body);}
.feature-card{text-align:center;padding:var(--space-md);}
.feature-icon{width:60px;height:60px;border-radius:var(--radius-md);background:rgba(37,99,235,0.08);display:flex;align-items:center;justify-content:center;margin:0 auto var(--space-sm);font-size:26px;color:var(--primary);transition:var(--transition);}
.feature-card:hover .feature-icon{background:var(--primary);color:#fff;transform:scale(1.05);}
.feature-card h3{font-size:18px;font-weight:700;margin-bottom:6px;color:var(--text-primary);}
.feature-card p{font-size:14px;color:var(--text-secondary);line-height:1.6;}
/* Category Section */
.category-section{background:var(--bg-section);}
.category-card{position:relative;border-radius:var(--radius-md);overflow:hidden;background:var(--bg-card);box-shadow:var(--shadow-sm);transition:var(--transition);display:flex;flex-direction:column;}
.category-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);}
.category-card-img{height:180px;background-size:cover;background-position:center;position:relative;}
.category-card-img .overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,0.55),transparent);}
.category-card-body{padding:var(--space-sm);flex:1;display:flex;flex-direction:column;}
.category-card-body h3{font-size:18px;font-weight:700;color:var(--text-primary);margin-bottom:6px;}
.category-card-body p{font-size:14px;color:var(--text-secondary);line-height:1.6;flex:1;margin-bottom:var(--space-sm);}
.category-card-body .btn{align-self:flex-start;}
/* Latest Posts */
.latest-section{background:var(--bg-body);}
.post-card{display:flex;flex-direction:column;border-radius:var(--radius-md);overflow:hidden;background:var(--bg-card);box-shadow:var(--shadow-sm);transition:var(--transition);}
.post-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);}
.post-card-img{height:190px;background-size:cover;background-position:center;position:relative;}
.post-card-img .badge{position:absolute;top:12px;left:12px;}
.post-card-body{padding:var(--space-sm);flex:1;display:flex;flex-direction:column;}
.post-card-body h3{font-size:17px;font-weight:700;color:var(--text-primary);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-card-body p{font-size:14px;color:var(--text-secondary);line-height:1.6;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:var(--space-sm);}
.post-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-muted);margin-bottom:var(--space-xs);}
.post-meta i{font-size:12px;}
.post-card-body .btn{align-self:flex-start;padding:8px 20px;font-size:13px;}
/* Stats / Numbers */
.stats-section{background:var(--bg-dark);background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;background-blend-mode:overlay;position:relative;}
.stats-section::before{content:'';position:absolute;inset:0;background:rgba(15,23,42,0.85);}
.stats-section .container{position:relative;z-index:2;}
.stats-section .section-title,.stats-section .section-subtitle{color:var(--text-inverse);}
.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md);margin-top:var(--space-md);}
@media(min-width:640px){.stats-grid{grid-template-columns:repeat(4,1fr);}}
.stat-item{text-align:center;padding:var(--space-md);background:rgba(255,255,255,0.06);border-radius:var(--radius-md);border:1px solid rgba(255,255,255,0.08);transition:var(--transition);}
.stat-item:hover{background:rgba(255,255,255,0.10);transform:translateY(-2px);}
.stat-item .num{font-size:32px;font-weight:900;color:var(--accent);letter-spacing:-0.5px;}
@media(min-width:768px){.stat-item .num{font-size:40px;}}
.stat-item .label{font-size:14px;color:rgba(255,255,255,0.65);margin-top:4px;}
/* Process / Steps */
.process-section{background:var(--bg-body);}
.step-card{text-align:center;padding:var(--space-md);position:relative;}
.step-num{width:48px;height:48px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;margin:0 auto var(--space-sm);}
.step-card h3{font-size:18px;font-weight:700;color:var(--text-primary);margin-bottom:6px;}
.step-card p{font-size:14px;color:var(--text-secondary);line-height:1.6;max-width:300px;margin:0 auto;}
@media(min-width:768px){.step-card:not(:last-child)::after{content:'→';position:absolute;right:-20px;top:40px;font-size:28px;color:var(--primary-light);font-weight:300;}}
/* FAQ */
.faq-section{background:var(--bg-section);}
.faq-item{border-bottom:1px solid var(--border);padding:var(--space-sm) 0;}
.faq-item:first-child{border-top:1px solid var(--border);}
.faq-q{display:flex;align-items:center;justify-content:space-between;font-size:16px;font-weight:600;color:var(--text-primary);cursor:pointer;padding:4px 0;gap:var(--space-sm);}
.faq-q i{color:var(--primary);font-size:18px;transition:var(--transition);}
.faq-q.open i{transform:rotate(180deg);}
.faq-a{padding-top:var(--space-xs);font-size:15px;color:var(--text-secondary);line-height:1.7;display:none;}
.faq-a.show{display:block;}
/* CTA */
.cta-section{background:linear-gradient(135deg,var(--primary),var(--primary-dark));padding:var(--space-lg) 0;}
@media(min-width:768px){.cta-section{padding:var(--space-xl) 0;}}
.cta-section .container{text-align:center;}
.cta-section h2{color:#fff;font-size:28px;font-weight:800;margin-bottom:var(--space-xs);}
@media(min-width:768px){.cta-section h2{font-size:36px;}}
.cta-section p{color:rgba(255,255,255,0.85);font-size:17px;max-width:600px;margin:0 auto var(--space-md);}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--space-sm);}
/* Footer */
.footer{background:var(--bg-dark);color:rgba(255,255,255,0.70);padding:var(--space-lg) 0 var(--space-md);}
.footer-grid{display:grid;gap:var(--space-md);margin-bottom:var(--space-md);}
@media(min-width:768px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr;}}
.footer-brand .logo{color:var(--text-inverse);margin-bottom:var(--space-xs);}
.footer-brand .logo span{-webkit-text-fill-color:#fff;background:linear-gradient(135deg,#fff,#94a3b8);-webkit-background-clip:text;background-clip:text;}
.footer-brand p{font-size:14px;line-height:1.7;margin-top:var(--space-xs);max-width:360px;}
.footer h4{font-size:16px;font-weight:700;color:#fff;margin-bottom:var(--space-sm);}
.footer ul{list-style:none;padding:0;}
.footer ul li{margin-bottom:8px;}
.footer ul li a{color:rgba(255,255,255,0.60);font-size:14px;transition:var(--transition);}
.footer ul li a:hover{color:var(--accent);padding-left:4px;}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:var(--space-sm);display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:var(--space-sm);font-size:13px;color:rgba(255,255,255,0.40);}
.footer-bottom a{color:rgba(255,255,255,0.50);}
.footer-bottom a:hover{color:var(--accent);}
/* Post Empty */
.empty-state{text-align:center;padding:var(--space-lg);color:var(--text-muted);}
.empty-state i{font-size:48px;margin-bottom:var(--space-sm);color:var(--primary-light);}
.empty-state p{font-size:16px;}

/* roulang page: article */
:root {
    --primary: #e74c3c;
    --primary-dark: #c0392b;
    --primary-light: #fadbd8;
    --secondary: #2c3e50;
    --secondary-light: #34495e;
    --accent: #f39c12;
    --bg: #ffffff;
    --bg-alt: #f8f9fa;
    --bg-dark: #1a1a2e;
    --text: #2c3e50;
    --text-light: #6c757d;
    --text-white: #ffffff;
    --border: #e9ecef;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --shadow: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --max-width: 1200px;
    --content-max: 760px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.7; -webkit-font-smoothing: antialiased; }
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 { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-title { font-size: 2rem; font-weight: 700; margin-bottom: 12px; letter-spacing: -0.02em; }
.section-subtitle { font-size: 1.1rem; color: var(--text-light); max-width: 600px; margin-bottom: 48px; line-height: 1.6; }
.section-dark .section-subtitle { color: rgba(255,255,255,0.7); }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Header */
.header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.95); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 700; color: var(--text) !important; }
.logo i { color: var(--primary); font-size: 1.5rem; }
.logo span { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav { display: flex; align-items: center; gap: 8px; }
.nav a { padding: 8px 18px; border-radius: var(--radius-sm); font-weight: 500; font-size: 0.95rem; color: var(--text); transition: var(--transition); position: relative; }
.nav a:hover { background: var(--bg-alt); color: var(--primary); }
.nav a.active { background: var(--primary); color: #fff; }
.nav a.active:hover { background: var(--primary-dark); }
.nav a.nav-cta { background: var(--primary); color: #fff; padding: 8px 24px; border-radius: 50px; font-weight: 600; }
.nav a.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 15px rgba(231,76,60,0.3); }
.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text); cursor: pointer; padding: 8px; border-radius: var(--radius-sm); }

/* Article Hero */
.article-hero { position: relative; min-height: 420px; display: flex; align-items: center; background: var(--bg-dark); overflow: hidden; }
.article-hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: 0.4; }
.article-hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(26,26,46,0.92) 0%, rgba(26,26,46,0.6) 100%); }
.article-hero .container { position: relative; z-index: 2; padding-top: 40px; padding-bottom: 40px; }
.article-breadcrumb { display: flex; align-items: center; gap: 8px; margin-bottom: 20px; font-size: 0.9rem; color: rgba(255,255,255,0.6); }
.article-breadcrumb a { color: rgba(255,255,255,0.7); }
.article-breadcrumb a:hover { color: #fff; }
.article-breadcrumb span { color: rgba(255,255,255,0.9); }
.article-category-badge { display: inline-block; background: var(--primary); color: #fff; padding: 4px 16px; border-radius: 50px; font-size: 0.85rem; font-weight: 600; margin-bottom: 16px; }
.article-hero h1 { font-size: 2.6rem; font-weight: 800; color: #fff; line-height: 1.25; margin-bottom: 16px; letter-spacing: -0.02em; max-width: 800px; }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; color: rgba(255,255,255,0.7); font-size: 0.95rem; }
.article-meta i { margin-right: 6px; }
.article-meta .meta-item { display: flex; align-items: center; }

/* Article Content */
.article-content-section { padding: 60px 0; }
.article-layout { display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: start; }
.article-body { max-width: var(--content-max); font-size: 1.05rem; line-height: 1.9; color: var(--text); }
.article-body p { margin-bottom: 1.5em; }
.article-body h2 { font-size: 1.6rem; font-weight: 700; margin-top: 2em; margin-bottom: 0.8em; letter-spacing: -0.01em; }
.article-body h3 { font-size: 1.25rem; font-weight: 600; margin-top: 1.5em; margin-bottom: 0.6em; }
.article-body ul, .article-body ol { margin-bottom: 1.5em; padding-left: 1.5em; }
.article-body li { margin-bottom: 0.5em; }
.article-body ul li { list-style: disc; }
.article-body ol li { list-style: decimal; }
.article-body blockquote { border-left: 4px solid var(--primary); background: var(--bg-alt); padding: 16px 24px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 1.5em 0; font-style: italic; color: var(--text-light); }
.article-body img { border-radius: var(--radius); margin: 1.5em 0; box-shadow: var(--shadow); }
.article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--primary-dark); }
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }
.article-tag { display: inline-block; background: var(--bg-alt); color: var(--text-light); padding: 6px 16px; border-radius: 50px; font-size: 0.85rem; font-weight: 500; transition: var(--transition); }
.article-tag:hover { background: var(--primary-light); color: var(--primary); }
.article-share { display: flex; align-items: center; gap: 12px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }
.article-share span { font-weight: 600; font-size: 0.95rem; color: var(--text-light); }
.article-share a { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; background: var(--bg-alt); color: var(--text); transition: var(--transition); font-size: 1.1rem; }
.article-share a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* Sidebar */
.article-sidebar { position: sticky; top: 100px; }
.sidebar-card { background: var(--bg-alt); border-radius: var(--radius); padding: 28px; margin-bottom: 24px; border: 1px solid var(--border); }
.sidebar-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--primary); }
.sidebar-list li { padding: 10px 0; border-bottom: 1px solid var(--border); }
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list a { color: var(--text); font-size: 0.95rem; display: flex; align-items: flex-start; gap: 10px; }
.sidebar-list a:hover { color: var(--primary); }
.sidebar-list a i { color: var(--primary); font-size: 0.8rem; margin-top: 6px; flex-shrink: 0; }
.sidebar-list .post-date { font-size: 0.8rem; color: var(--text-light); display: block; margin-top: 2px; }

/* Not Found */
.not-found-box { text-align: center; padding: 80px 24px; }
.not-found-box i { font-size: 4rem; color: var(--text-light); margin-bottom: 24px; display: block; }
.not-found-box h2 { font-size: 1.8rem; margin-bottom: 12px; }
.not-found-box p { color: var(--text-light); margin-bottom: 24px; }
.not-found-box .btn { display: inline-flex; align-items: center; gap: 8px; }

/* Related Posts */
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.related-card { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); transition: var(--transition); }
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.related-card-img { height: 180px; background-size: cover; background-position: center; position: relative; }
.related-card-img .card-cat { position: absolute; top: 12px; left: 12px; background: var(--primary); color: #fff; padding: 2px 12px; border-radius: 50px; font-size: 0.75rem; font-weight: 600; }
.related-card-body { padding: 20px; }
.related-card-body h4 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.related-card-body h4 a { color: var(--text); }
.related-card-body h4 a:hover { color: var(--primary); }
.related-card-body p { font-size: 0.88rem; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 12px; }
.related-card-body .meta { font-size: 0.8rem; color: var(--text-light); display: flex; align-items: center; gap: 12px; }

/* 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-question { padding: 20px 24px; display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: 600; font-size: 1.05rem; background: none; border: none; width: 100%; text-align: left; color: var(--text); transition: var(--transition); }
.faq-question i { color: var(--primary); transition: var(--transition); font-size: 1rem; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer { padding: 0 24px 20px; color: var(--text-light); line-height: 1.7; display: none; }
.faq-item.active .faq-answer { display: block; }
.section-dark .faq-item { background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.1); }
.section-dark .faq-question { color: #fff; }
.section-dark .faq-answer { color: rgba(255,255,255,0.7); }

/* CTA */
.cta-box { background: linear-gradient(135deg, var(--primary), #e74c3c); border-radius: var(--radius-lg); padding: 64px; text-align: center; color: #fff; position: relative; overflow: hidden; }
.cta-box::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center/cover; opacity: 0.1; }
.cta-box h2 { font-size: 2rem; font-weight: 700; margin-bottom: 16px; position: relative; }
.cta-box p { font-size: 1.1rem; opacity: 0.9; max-width: 600px; margin: 0 auto 32px; position: relative; }
.cta-box .btn-white { display: inline-flex; align-items: center; gap: 8px; background: #fff; color: var(--primary); padding: 14px 36px; border-radius: 50px; font-weight: 600; font-size: 1.05rem; transition: var(--transition); }
.cta-box .btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,0,0,0.2); color: var(--primary-dark); }

/* Footer */
.footer { background: var(--bg-dark); color: rgba(255,255,255,0.8); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { margin-bottom: 16px; color: #fff !important; display: inline-flex; }
.footer-brand .logo span { background: linear-gradient(135deg, #fff, #fadbd8); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer-brand p { font-size: 0.95rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 320px; }
.footer h4 { color: #fff; font-size: 1.05rem; font-weight: 600; margin-bottom: 18px; }
.footer ul li { margin-bottom: 10px; }
.footer ul a { color: rgba(255,255,255,0.6); font-size: 0.92rem; transition: var(--transition); display: inline-flex; align-items: center; gap: 8px; }
.footer ul a:hover { color: #fff; padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.88rem; color: rgba(255,255,255,0.5); }
.footer-bottom a { color: rgba(255,255,255,0.6); }
.footer-bottom a:hover { color: #fff; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 50px; font-weight: 600; font-size: 0.95rem; transition: var(--transition); border: none; cursor: pointer; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(231,76,60,0.3); color: #fff; }
.btn-outline { background: transparent; color: var(--text); border: 2px solid var(--border); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

/* Empty state */
.empty-state { text-align: center; padding: 32px 24px; color: var(--text-light); }
.empty-state i { font-size: 2.5rem; margin-bottom: 16px; display: block; color: var(--border); }

/* Responsive */
@media (max-width: 1024px) {
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .sidebar-card { margin-bottom: 0; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .section { padding: 56px 0; }
    .section-title { font-size: 1.6rem; }
    .nav-toggle { display: block; }
    .nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px 24px; gap: 4px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
    .nav.open { display: flex; }
    .nav a { width: 100%; padding: 12px 16px; border-radius: var(--radius-sm); }
    .nav a.nav-cta { text-align: center; }
    .article-hero { min-height: 320px; }
    .article-hero h1 { font-size: 1.8rem; }
    .article-body { font-size: 1rem; }
    .article-sidebar { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr; }
    .cta-box { padding: 40px 24px; }
    .cta-box h2 { font-size: 1.5rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .article-hero h1 { font-size: 1.5rem; }
    .article-meta { gap: 12px; font-size: 0.85rem; }
    .article-tags { gap: 8px; }
    .faq-question { font-size: 0.95rem; padding: 16px 18px; }
    .faq-answer { padding: 0 18px 16px; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #f97316;
            --primary-dark: #ea580c;
            --primary-light: #fb923c;
            --primary-bg: #fff7ed;
            --secondary: #1e293b;
            --secondary-light: #334155;
            --accent: #f59e0b;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --text: #0f172a;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 0.375rem;
            --radius: 0.75rem;
            --radius-lg: 1.25rem;
            --radius-xl: 1.75rem;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12), 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.16);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --spacing-section: 5rem;
            --spacing-block: 3rem;
        }

        /* ===== 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);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        button {
            font: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: var(--transition);
        }
        input,
        textarea {
            font: inherit;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 0.625rem 1rem;
            outline: none;
            transition: var(--transition);
            background: var(--bg-white);
            color: var(--text);
        }
        input:focus,
        textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.15);
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2.2rem, 5.5vw, 3.6rem);
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: clamp(1.15rem, 2vw, 1.5rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            color: var(--text-light);
            max-width: 70ch;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-block);
        }
        .section-header h2 {
            margin-bottom: 0.75rem;
        }
        .section-header p {
            margin: 0 auto;
            font-size: 1.1rem;
            max-width: 640px;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 1rem auto 0;
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav a {
            padding: 0.5rem 1.1rem;
            border-radius: var(--radius);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-light);
            position: relative;
            transition: var(--transition);
        }
        .nav a:hover {
            color: var(--text);
            background: var(--primary-bg);
        }
        .nav a.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .nav a.nav-cta {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            padding: 0.5rem 1.4rem;
            border-radius: var(--radius);
            box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
        }
        .nav a.nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 0.25rem;
            border-radius: var(--radius-sm);
            background: var(--bg);
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
        }
        .nav-toggle:hover {
            background: var(--border-light);
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            margin-top: var(--header-height);
            padding: 6rem 0 5rem;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(249, 115, 22, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero h1 {
            color: #fff;
            font-size: clamp(2.4rem, 5vw, 3.8rem);
            margin-bottom: 1rem;
            max-width: 800px;
        }
        .category-hero h1 i {
            color: var(--primary);
            margin-right: 0.3rem;
        }
        .category-hero p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.15rem;
            max-width: 600px;
            line-height: 1.8;
        }
        .category-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 1.5rem;
        }
        .category-hero .hero-tags span {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(4px);
            padding: 0.35rem 1rem;
            border-radius: 999px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.8);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 1rem 0 0;
            background: var(--bg);
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: var(--text-light);
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: var(--text);
            font-weight: 500;
        }
        .breadcrumb .sep {
            color: var(--border);
            font-weight: 300;
        }

        /* ===== Category Intro ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .intro-content h2 {
            margin-bottom: 1rem;
        }
        .intro-content p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        .intro-content .intro-list {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
            margin-top: 1.2rem;
        }
        .intro-content .intro-list li {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-weight: 500;
            color: var(--text);
        }
        .intro-content .intro-list li i {
            color: var(--primary);
            font-size: 1.1rem;
            width: 24px;
            text-align: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4/3;
            background: var(--border-light);
        }
        .intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .intro-image:hover img {
            transform: scale(1.04);
        }

        /* ===== Subcategory Cards ===== */
        .sub-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.5rem;
        }
        .sub-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .sub-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-bg);
        }
        .sub-card .card-img {
            aspect-ratio: 16/10;
            overflow: hidden;
            background: var(--border-light);
        }
        .sub-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .sub-card:hover .card-img img {
            transform: scale(1.06);
        }
        .sub-card .card-body {
            padding: 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .sub-card .card-body h3 {
            margin-bottom: 0.5rem;
            font-size: 1.2rem;
        }
        .sub-card .card-body p {
            font-size: 0.95rem;
            flex: 1;
            margin-bottom: 1rem;
        }
        .sub-card .card-body .badge-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            margin-bottom: 1rem;
        }
        .sub-card .card-body .badge {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary-dark);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.7rem;
            border-radius: 999px;
        }
        .sub-card .card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.95rem;
            margin-top: auto;
        }
        .sub-card .card-body .card-link i {
            transition: transform var(--transition);
        }
        .sub-card .card-body .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Featured Picks ===== */
        .featured-bg {
            background: var(--secondary);
            position: relative;
        }
        .featured-bg .section-header h2 {
            color: #fff;
        }
        .featured-bg .section-header p {
            color: rgba(255, 255, 255, 0.65);
        }
        .featured-bg .section-divider {
            background: var(--accent);
        }
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 1.5rem;
        }
        .featured-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(8px);
            border-radius: var(--radius-lg);
            padding: 1.8rem 1.5rem;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .featured-card:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(249, 115, 22, 0.3);
            transform: translateY(-4px);
        }
        .featured-card .fc-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 0.75rem;
        }
        .featured-card h3 {
            color: #fff;
            margin-bottom: 0.5rem;
        }
        .featured-card p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
            flex: 1;
            margin-bottom: 1rem;
        }
        .featured-card .fc-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 1rem;
        }
        .featured-card .fc-meta .tag {
            background: rgba(249, 115, 22, 0.2);
            color: var(--primary-light);
            padding: 0.15rem 0.7rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        /* ===== Guide / Tips ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
        }
        .guide-item {
            display: flex;
            gap: 1.2rem;
            background: var(--bg-white);
            padding: 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .guide-item:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
        .guide-item .gi-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            opacity: 0.3;
            line-height: 1;
            min-width: 48px;
        }
        .guide-item .gi-content h4 {
            margin-bottom: 0.3rem;
        }
        .guide-item .gi-content p {
            font-size: 0.92rem;
        }

        /* ===== Stats / Data ===== */
        .stats-section {
            background: linear-gradient(135deg, #0f172a, #1e293b);
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
            position: relative;
            z-index: 2;
        }
        .stat-item .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .stat-item .stat-label {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
            margin-top: 0.3rem;
        }
        .stat-item .stat-desc {
            color: rgba(255, 255, 255, 0.35);
            font-size: 0.8rem;
            margin-top: 0.2rem;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-bg);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 1.2rem 1.5rem;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            user-select: none;
            color: var(--text);
        }
        .faq-question i {
            color: var(--primary);
            transition: transform var(--transition);
            font-size: 1.1rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            padding: 5rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            margin: 0 auto 2rem;
            max-width: 560px;
            font-size: 1.1rem;
        }
        .cta-section .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: #fff;
            color: var(--primary-dark);
            border-color: #fff;
        }
        .btn-primary:hover {
            background: transparent;
            color: #fff;
            border-color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 4rem 0 0;
        }
        .footer .logo span {
            color: #fff;
            -webkit-text-fill-color: #fff;
            background: none;
        }
        .footer .logo i {
            color: var(--primary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 1rem;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.95rem;
            max-width: 320px;
        }
        .footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
        }
        .footer ul li {
            margin-bottom: 0.6rem;
        }
        .footer ul li a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.92rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .footer ul li a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
            gap: 1rem;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --spacing-section: 3.5rem;
                --spacing-block: 2rem;
            }
            .nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 1rem 1.5rem 1.5rem;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-lg);
                gap: 0.25rem;
            }
            .nav.open {
                display: flex;
            }
            .nav a {
                width: 100%;
                padding: 0.7rem 1rem;
                border-radius: var(--radius);
            }
            .nav a.nav-cta {
                text-align: center;
                margin-top: 0.25rem;
            }
            .nav-toggle {
                display: flex;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .intro-image {
                order: -1;
            }
            .category-hero {
                padding: 4rem 0 3rem;
                min-height: 280px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .sub-grid {
                grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.2rem;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .guide-item {
                flex-direction: column;
                gap: 0.6rem;
            }
            .guide-item .gi-num {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
            .sub-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .stat-item .stat-number {
                font-size: 1.7rem;
            }
            .btn {
                padding: 0.65rem 1.4rem;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
            .btn-group {
                flex-direction: column;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .faq-question {
                font-size: 0.95rem;
                padding: 1rem 1.2rem;
            }
            .faq-answer {
                padding: 0 1.2rem 1rem;
                font-size: 0.92rem;
            }
        }

        /* ===== Utility ===== */
        .text-primary {
            color: var(--primary);
        }
        .mb-1 {
            margin-bottom: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 1.5rem;
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .text-center {
            text-align: center;
        }
        .w-full {
            width: 100%;
        }