/* roulang page: index */
:root {
  --primary: #0a2e5c;
  --primary-light: #1a4a7a;
  --primary-dark: #061d3a;
  --secondary: #d4a56a;
  --secondary-light: #e8c88a;
  --secondary-dark: #b8874a;
  --bg: #f8f6f2;
  --bg-alt: #f0ece6;
  --bg-dark: #0a1628;
  --text: #1a1a2e;
  --text-light: #6b7280;
  --text-white: #f9f7f4;
  --border: #e5e0d8;
  --border-light: #f0ece6;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(0,0,0,0.07);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.18);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --max-w: 1200px;
  --header-h: 72px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}a:hover{color:var(--secondary)}
img{max-width:100%;height:auto;display:block}
button,input,textarea{font-family:inherit;font-size:1rem}
ul,ol{list-style:none}
.container{width:100%;max-width:var(--max-w);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:2.25rem;font-weight:700;margin-bottom:0.75rem;line-height:1.25;letter-spacing:-0.02em}
.section-subtitle{font-size:1.125rem;color:var(--text-light);max-width:640px;line-height:1.6;margin-bottom:2.5rem}
.section-dark .section-subtitle{color:rgba(255,255,255,0.65)}
.section-label{display:inline-block;font-size:0.8125rem;font-weight:600;text-transform:uppercase;letter-spacing:0.08em;color:var(--secondary);margin-bottom:0.75rem}
.text-center{text-align:center}.text-center .section-subtitle{margin-left:auto;margin-right:auto}
.btn{display:inline-flex;align-items:center;gap:0.5rem;padding:0.75rem 2rem;font-size:1rem;font-weight:600;border:none;border-radius:var(--radius);cursor:pointer;transition:var(--transition);line-height:1.4}
.btn-primary{background:var(--secondary);color:var(--primary-dark);box-shadow:0 4px 14px rgba(212,165,106,0.35)}.btn-primary:hover{background:var(--secondary-light);transform:translateY(-2px);box-shadow:0 6px 24px rgba(212,165,106,0.45);color:var(--primary-dark)}
.btn-outline{background:transparent;border:2px solid var(--secondary);color:var(--secondary)}.btn-outline:hover{background:var(--secondary);color:var(--primary-dark);transform:translateY(-2px)}
.btn-lg{padding:1rem 2.5rem;font-size:1.125rem;border-radius:var(--radius-lg)}
.btn-white{background:var(--text-white);color:var(--primary);box-shadow:0 4px 14px rgba(0,0,0,0.1)}.btn-white:hover{background:#fff;transform:translateY(-2px);box-shadow:0 8px 28px rgba(0,0,0,0.15);color:var(--primary)}
.card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:var(--transition)}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card-img{width:100%;height:200px;object-fit:cover;display:block}
.card-body{padding:1.5rem}.card-title{font-size:1.125rem;font-weight:600;margin-bottom:0.5rem;line-height:1.4}.card-text{font-size:0.9375rem;color:var(--text-light);line-height:1.6}
.badge{display:inline-block;padding:0.25rem 0.75rem;font-size:0.75rem;font-weight:600;border-radius:50px;background:var(--bg-alt);color:var(--text-light);transition:var(--transition)}.badge-primary{background:rgba(212,165,106,0.15);color:var(--secondary-dark)}.badge-primary:hover{background:var(--secondary);color:var(--primary-dark)}
.tag{display:inline-flex;align-items:center;gap:0.375rem;padding:0.375rem 1rem;font-size:0.8125rem;font-weight:500;border-radius:50px;background:var(--bg-alt);color:var(--text-light);transition:var(--transition);cursor:pointer}.tag:hover{background:var(--secondary);color:var(--primary-dark)}.tag i{font-size:0.75rem}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:2rem}.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:2rem}.grid-4{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:2rem}
.flex-center{display:flex;align-items:center;justify-content:center}
/* header */
.header{position:fixed;top:0;left:0;right:0;height:var(--header-h);background:rgba(255,255,255,0.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);z-index:1000;transition:var(--transition)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{font-size:1.5rem;font-weight:800;color:var(--primary);letter-spacing:-0.03em;display:flex;align-items:center;gap:0.375rem}.logo i{color:var(--secondary);font-size:1.375rem}.logo:hover{color:var(--primary)}
.nav{display:flex;align-items:center;gap:0.5rem}
.nav a{position:relative;padding:0.5rem 1.25rem;font-size:0.9375rem;font-weight:500;color:var(--text-light);border-radius:50px;transition:var(--transition)}.nav a:hover{color:var(--primary);background:var(--bg-alt)}
.nav a.active{background:var(--primary);color:#fff}.nav a.active:hover{background:var(--primary-light);color:#fff}
.nav-cta{margin-left:0.75rem}
.header-actions{display:flex;align-items:center;gap:0.75rem}
.mobile-toggle{display:none;background:none;border:none;font-size:1.375rem;color:var(--text);cursor:pointer;padding:0.5rem;border-radius:var(--radius-sm);transition:var(--transition)}.mobile-toggle:hover{background:var(--bg-alt)}
/* hero */
.hero{position:relative;min-height:90vh;display:flex;align-items:center;margin-top:var(--header-h);overflow:hidden;background:var(--primary-dark)}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center center/cover no-repeat;opacity:0.55;transition:transform 0.6s ease}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg, rgba(10,46,92,0.82) 0%, rgba(10,46,92,0.40) 60%, rgba(10,22,40,0.60) 100%)}
.hero .container{position:relative;z-index:2;padding:80px 24px}
.hero-content{max-width:720px}
.hero-badge{display:inline-flex;align-items:center;gap:0.5rem;padding:0.375rem 1.25rem;background:rgba(212,165,106,0.18);border:1px solid rgba(212,165,106,0.25);border-radius:50px;color:var(--secondary-light);font-size:0.8125rem;font-weight:500;margin-bottom:1.5rem;backdrop-filter:blur(4px)}
.hero h1{font-size:3.5rem;font-weight:800;line-height:1.15;color:#fff;letter-spacing:-0.03em;margin-bottom:1.25rem}
.hero h1 span{color:var(--secondary)}
.hero p{font-size:1.25rem;color:rgba(255,255,255,0.78);line-height:1.7;max-width:580px;margin-bottom:2.25rem}
.hero-actions{display:flex;gap:1rem;flex-wrap:wrap}
.hero-stats{display:flex;gap:3rem;margin-top:3.5rem;padding-top:2.5rem;border-top:1px solid rgba(255,255,255,0.12)}
.hero-stat{text-align:center}.hero-stat-num{font-size:2rem;font-weight:700;color:#fff;display:block;line-height:1.2}.hero-stat-label{font-size:0.875rem;color:rgba(255,255,255,0.55);margin-top:0.25rem}
/* about */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:3.5rem;align-items:center}
.about-image{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg)}.about-image img{width:100%;height:400px;object-fit:cover;display:block}
.about-image::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg, rgba(10,46,92,0.10) 0%, transparent 60%)}
.about-text h2{font-size:2rem;font-weight:700;margin-bottom:1rem;line-height:1.3}
.about-text p{font-size:1.0625rem;color:var(--text-light);line-height:1.8;margin-bottom:1.25rem}
.about-tags{display:flex;flex-wrap:wrap;gap:0.75rem;margin-top:1.5rem}
/* features */
.feature-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:2rem}
.feature-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:var(--transition);cursor:default}.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl)}
.feature-card .card-img{height:220px}.feature-card .card-body{padding:1.75rem}
.feature-icon{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:var(--radius);background:rgba(212,165,106,0.12);color:var(--secondary);font-size:1.25rem;margin-bottom:1rem}
.feature-card .card-title{font-size:1.25rem;font-weight:600;margin-bottom:0.5rem}
.feature-card .card-text{font-size:0.9375rem;color:var(--text-light);line-height:1.7}
/* guide entry */
.guide-section{background:var(--bg-dark);color:var(--text-white)}
.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.guide-content h2{font-size:2rem;font-weight:700;margin-bottom:1rem;line-height:1.3}
.guide-content p{font-size:1.0625rem;color:rgba(255,255,255,0.7);line-height:1.8;margin-bottom:1.5rem}
.guide-features{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-bottom:2rem}
.guide-feature{display:flex;align-items:flex-start;gap:0.75rem;padding:0.75rem 1rem;background:rgba(255,255,255,0.06);border-radius:var(--radius-sm);border:1px solid rgba(255,255,255,0.08)}
.guide-feature i{color:var(--secondary);font-size:1rem;margin-top:0.125rem}
.guide-feature span{font-size:0.9375rem;color:rgba(255,255,255,0.85)}
.guide-image{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-xl)}.guide-image img{width:100%;height:380px;object-fit:cover}
/* news */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.news-card{display:flex;gap:1.25rem;background:#fff;border-radius:var(--radius);padding:1.25rem;box-shadow:var(--shadow);transition:var(--transition);align-items:flex-start}.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.news-card-img{width:120px;height:90px;border-radius:var(--radius-sm);object-fit:cover;flex-shrink:0}
.news-card-body{flex:1;min-width:0}
.news-card-meta{display:flex;align-items:center;gap:0.75rem;font-size:0.8125rem;color:var(--text-light);margin-bottom:0.375rem;flex-wrap:wrap}
.news-card-meta .badge{font-size:0.6875rem;padding:0.125rem 0.625rem}
.news-card-title{font-size:1.0625rem;font-weight:600;margin-bottom:0.375rem;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card-title a{color:var(--text)}.news-card-title a:hover{color:var(--primary)}
.news-card-excerpt{font-size:0.875rem;color:var(--text-light);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-empty{padding:3rem 2rem;text-align:center;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);grid-column:1/-1}
.news-empty i{font-size:2.5rem;color:var(--text-light);opacity:0.5;margin-bottom:1rem;display:block}
.news-empty p{font-size:1rem;color:var(--text-light)}
/* stats */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem}
.stat-card{text-align:center;padding:2.5rem 1.5rem;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);transition:var(--transition)}.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.stat-icon{font-size:2rem;color:var(--secondary);margin-bottom:0.75rem}
.stat-num{font-size:2.5rem;font-weight:800;color:var(--primary);line-height:1.2;letter-spacing:-0.03em}
.stat-label{font-size:0.9375rem;color:var(--text-light);margin-top:0.375rem}
/* process */
.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.process-step{text-align:center;padding:2rem 1.25rem;position:relative}
.process-step:not(:last-child)::after{content:'→';position:absolute;right:-1rem;top:50%;transform:translateY(-50%);font-size:1.5rem;color:var(--secondary);opacity:0.5}
.process-num{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:50%;background:var(--primary);color:#fff;font-size:1.25rem;font-weight:700;margin-bottom:1.25rem;box-shadow:0 4px 16px rgba(10,46,92,0.25)}
.process-step h4{font-size:1.125rem;font-weight:600;margin-bottom:0.5rem}
.process-step p{font-size:0.875rem;color:var(--text-light);line-height:1.6}
/* faq */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border);padding:1.25rem 0;cursor:pointer}
.faq-question{display:flex;align-items:center;justify-content:space-between;gap:1rem;font-size:1.0625rem;font-weight:600;color:var(--text);padding:0.25rem 0;transition:var(--transition);background:none;border:none;width:100%;text-align:left;cursor:pointer}
.faq-question i{font-size:0.875rem;color:var(--text-light);transition:var(--transition);flex-shrink:0}
.faq-item.open .faq-question i{transform:rotate(180deg);color:var(--secondary)}
.faq-answer{padding-top:0.75rem;font-size:0.9375rem;color:var(--text-light);line-height:1.7;display:none}
.faq-item.open .faq-answer{display:block}
/* cta */
.cta-section{background:var(--primary);position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center center/cover no-repeat;opacity:0.08}
.cta-content{position:relative;z-index:2;text-align:center;padding:3rem 0}
.cta-content h2{font-size:2.25rem;font-weight:700;color:#fff;margin-bottom:1rem}
.cta-content p{font-size:1.125rem;color:rgba(255,255,255,0.8);max-width:560px;margin:0 auto 2rem}
.cta-content .btn-white{font-size:1.0625rem;padding:1rem 2.75rem}
/* footer */
.footer{background:var(--bg-dark);color:rgba(255,255,255,0.7);padding:3rem 0 1.5rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2.5rem;margin-bottom:2.5rem}
.footer-brand .logo{color:#fff;margin-bottom:0.75rem}.footer-brand .logo i{color:var(--secondary)}
.footer-brand p{font-size:0.875rem;line-height:1.7;max-width:320px}
.footer-social{display:flex;gap:0.75rem;margin-top:1.25rem}
.footer-social a{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,0.08);color:rgba(255,255,255,0.6);transition:var(--transition)}.footer-social a:hover{background:var(--secondary);color:var(--primary-dark)}
.footer-col h5{font-size:0.9375rem;font-weight:600;color:#fff;margin-bottom:1rem}
.footer-col ul li{margin-bottom:0.5rem}
.footer-col ul li a{font-size:0.875rem;color:rgba(255,255,255,0.55);transition:var(--transition)}.footer-col ul li a:hover{color:var(--secondary)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:1.5rem;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:0.75rem;font-size:0.8125rem;color:rgba(255,255,255,0.4)}
.footer-bottom a{color:rgba(255,255,255,0.5)}.footer-bottom a:hover{color:var(--secondary)}
/* responsive */
@media(max-width:1024px){
  .hero h1{font-size:2.75rem}
  .grid-4,.stats-grid{grid-template-columns:1fr 1fr}
  .process-grid{grid-template-columns:1fr 1fr}.process-step:not(:last-child)::after{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .section{padding:60px 0}
  .section-title{font-size:1.75rem}
  .hero h1{font-size:2.125rem}.hero p{font-size:1.0625rem}.hero-stats{gap:1.5rem;flex-wrap:wrap}.hero-stat{flex:1;min-width:80px}
  .about-grid,.guide-grid,.grid-2,.news-grid{grid-template-columns:1fr}
  .grid-3,.feature-grid{grid-template-columns:1fr 1fr}
  .about-image img{height:260px}.guide-image img{height:220px}
  .guide-features{grid-template-columns:1fr}
  .news-card{flex-direction:column}.news-card-img{width:100%;height:160px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:1.5rem}
  .mobile-toggle{display:block}
  .nav{position:fixed;top:var(--header-h);left:0;right:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);flex-direction:column;padding:1.5rem;gap:0.5rem;border-bottom:1px solid var(--border);transform:translateY(-120%);opacity:0;pointer-events:none;transition:var(--transition);box-shadow:var(--shadow-lg);border-radius:0 0 var(--radius) var(--radius);max-height:80vh;overflow-y:auto}
  .nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav a{width:100%;padding:0.75rem 1.25rem;font-size:1rem}
  .nav-cta{margin-left:0;width:100%}.nav-cta .btn{width:100%;justify-content:center}
  .header-actions .btn{display:none}
  .process-grid{grid-template-columns:1fr 1fr;gap:1rem}
  .stats-grid{grid-template-columns:1fr 1fr;gap:1rem}
  .stat-card{padding:1.5rem 1rem}.stat-num{font-size:2rem}
}
@media(max-width:520px){
  .container{padding:0 16px}
  .hero h1{font-size:1.75rem}.hero p{font-size:0.9375rem}.hero-stats{gap:1rem}.hero-stat-num{font-size:1.5rem}
  .grid-3,.feature-grid{grid-template-columns:1fr}
  .grid-4,.stats-grid{grid-template-columns:1fr 1fr}.stats-grid{gap:0.75rem}
  .process-grid{grid-template-columns:1fr 1fr;gap:0.75rem}
  .process-step{padding:1.25rem 0.75rem}.process-num{width:44px;height:44px;font-size:1rem}
  .section-title{font-size:1.5rem}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .hero-actions{flex-direction:column}.hero-actions .btn{width:100%;justify-content:center}
  .news-card-img{height:120px}
}
@media(max-width:400px){
  .hero h1{font-size:1.5rem}
  .stats-grid{grid-template-columns:1fr 1fr}
  .process-grid{grid-template-columns:1fr}
}

/* roulang page: article */
:root {
  --primary: #0f4c81;
  --primary-light: #1a73e8;
  --primary-dark: #0a355a;
  --secondary: #0d9488;
  --secondary-light: #14b8a6;
  --accent: #f59e0b;
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --text: #1e293b;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(15,76,129,0.08);
  --shadow-hover: 0 12px 40px rgba(15,76,129,0.16);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --nav-height: 72px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter','Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-light)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media(max-width:640px){.container{padding:0 16px}}
/* header & nav */
.header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,0.96);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);height:var(--nav-height);transition:var(--transition)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{display:flex;align-items:center;gap:10px;font-size:1.5rem;font-weight:700;color:var(--primary)!important}
.logo i{font-size:1.6rem;color:var(--secondary)}
.nav{display:flex;align-items:center;gap:8px}
.nav a{padding:8px 18px;border-radius:var(--radius-sm);font-size:0.95rem;font-weight:500;color:var(--text);transition:var(--transition);position:relative}
.nav a:hover{color:var(--primary);background:rgba(15,76,129,0.06)}
.nav a.active{color:var(--primary);background:rgba(15,76,129,0.1)}
.nav a.active::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:20px;height:3px;background:var(--secondary);border-radius:2px}
.nav-cta{margin-left:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0.6rem 1.8rem;border-radius:var(--radius-sm);font-weight:600;font-size:0.95rem;transition:var(--transition);border:none;cursor:pointer;text-align:center}
.btn-primary{background:var(--primary);color:#fff!important}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(15,76,129,0.25)}
.btn-secondary{background:var(--secondary);color:#fff!important}
.btn-secondary:hover{background:#0f766e;transform:translateY(-2px);box-shadow:0 8px 24px rgba(13,148,136,0.25)}
.btn-outline{border:2px solid var(--primary);color:var(--primary)!important;background:transparent}
.btn-outline:hover{background:var(--primary);color:#fff!important;transform:translateY(-2px)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;background:none;border:none}
.hamburger span{display:block;width:26px;height:2.5px;background:var(--text);border-radius:4px;transition:var(--transition)}
@media(max-width:768px){
  .hamburger{display:flex}
  .nav{position:fixed;top:var(--nav-height);left:0;right:0;background:#fff;flex-direction:column;padding:20px 24px;gap:12px;border-bottom:1px solid var(--border);box-shadow:0 20px 40px rgba(0,0,0,0.1);transform:translateY(-120%);opacity:0;pointer-events:none;transition:var(--transition)}
  .nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav a{width:100%;padding:12px 16px;font-size:1.05rem}
  .nav-cta{margin-left:0;width:100%}
  .nav-cta .btn{width:100%}
}
/* article hero */
.article-hero{position:relative;padding:140px 0 80px;margin-top:var(--nav-height);background:linear-gradient(135deg,rgba(15,76,129,0.92),rgba(13,148,136,0.88)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;min-height:380px;display:flex;align-items:center}
.article-hero::before{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0.1) 0%,rgba(0,0,0,0.4) 100%);pointer-events:none}
.article-hero .container{position:relative;z-index:2}
.article-hero .category-badge{display:inline-block;padding:6px 18px;background:rgba(255,255,255,0.2);backdrop-filter:blur(4px);border-radius:50px;font-size:0.85rem;font-weight:500;color:#fff;margin-bottom:20px;border:1px solid rgba(255,255,255,0.25)}
.article-hero h1{font-size:2.8rem;font-weight:800;color:#fff;line-height:1.25;max-width:900px;text-shadow:0 2px 20px rgba(0,0,0,0.15)}
.article-hero .meta{display:flex;flex-wrap:wrap;gap:20px;margin-top:24px;color:rgba(255,255,255,0.85);font-size:0.95rem}
.article-hero .meta i{margin-right:6px}
.article-hero .meta span{display:inline-flex;align-items:center}
@media(max-width:768px){
  .article-hero{padding:120px 0 60px;min-height:300px}
  .article-hero h1{font-size:2rem}
  .article-hero .meta{gap:14px;font-size:0.85rem}
}
@media(max-width:520px){
  .article-hero h1{font-size:1.6rem}
}
/* article content */
.article-main{padding:60px 0}
.article-body{max-width:820px;margin:0 auto}
.article-content{font-size:1.1rem;line-height:1.9;color:var(--text)}
.article-content p{margin-bottom:1.6em}
.article-content h2,.article-content h3{margin-top:2em;margin-bottom:0.8em;font-weight:700;color:var(--primary-dark)}
.article-content h2{font-size:1.8rem}
.article-content h3{font-size:1.4rem}
.article-content ul,.article-content ol{padding-left:1.8em;margin-bottom:1.6em}
.article-content li{margin-bottom:0.5em}
.article-content blockquote{border-left:4px solid var(--secondary);padding:16px 24px;margin:1.6em 0;background:var(--bg-alt);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-weak);font-style:italic}
.article-content img{border-radius:var(--radius);margin:2em auto;box-shadow:var(--shadow)}
.article-content a{color:var(--primary-light);text-decoration:underline;text-underline-offset:2px}
.article-content a:hover{color:var(--primary-dark)}
.article-featured-image{margin:2em 0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:40px;padding-top:30px;border-top:1px solid var(--border)}
.article-tags .tag{padding:6px 16px;background:var(--bg-alt);border-radius:50px;font-size:0.85rem;color:var(--text-weak);transition:var(--transition)}
.article-tags .tag:hover{background:var(--primary);color:#fff}
.article-share{display:flex;align-items:center;gap:14px;margin-top:28px;padding:20px 0;border-top:1px solid var(--border)}
.article-share span{font-weight:600;font-size:0.95rem;color:var(--text-weak)}
.article-share a{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:var(--bg-alt);color:var(--text-weak);transition:var(--transition);font-size:1.1rem}
.article-share a:hover{background:var(--primary);color:#fff;transform:translateY(-3px)}
@media(max-width:768px){
  .article-content{font-size:1rem}
  .article-content h2{font-size:1.5rem}
  .article-content h3{font-size:1.2rem}
}
/* not found */
.not-found{text-align:center;padding:100px 0}
.not-found i{font-size:4rem;color:var(--text-weak);margin-bottom:24px;opacity:0.5}
.not-found h2{font-size:2rem;color:var(--text);margin-bottom:16px}
.not-found p{color:var(--text-weak);margin-bottom:28px;font-size:1.1rem}
/* related */
.related{background:var(--bg-alt);padding:70px 0}
.related h2{font-size:1.8rem;font-weight:700;color:var(--primary-dark);margin-bottom:40px;text-align:center}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.related-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition);cursor:pointer}
.related-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.related-card .card-img{height:200px;overflow:hidden}
.related-card .card-img img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.related-card:hover .card-img img{transform:scale(1.06)}
.related-card .card-body{padding:20px 24px 24px}
.related-card .card-body .card-cat{font-size:0.8rem;font-weight:600;color:var(--secondary);text-transform:uppercase;letter-spacing:0.5px;margin-bottom:6px}
.related-card .card-body h3{font-size:1.15rem;font-weight:700;color:var(--text);margin-bottom:8px;line-height:1.4}
.related-card .card-body p{font-size:0.9rem;color:var(--text-weak);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card .card-body .date{font-size:0.8rem;color:var(--text-weak);margin-top:12px;display:flex;align-items:center;gap:6px}
@media(max-width:1024px){
  .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .related-grid{grid-template-columns:1fr}
  .related h2{font-size:1.4rem}
}
/* faq */
.faq-section{padding:70px 0;background:#fff}
.faq-section h2{font-size:1.8rem;font-weight:700;color:var(--primary-dark);text-align:center;margin-bottom:40px}
.faq-grid{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:var(--transition)}
.faq-item:hover{border-color:var(--primary-light);box-shadow:var(--shadow)}
.faq-question{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;cursor:pointer;font-weight:600;font-size:1.05rem;color:var(--text);transition:var(--transition);background:var(--bg-alt)}
.faq-question i{transition:var(--transition);color:var(--primary);font-size:0.9rem}
.faq-item.open .faq-question i{transform:rotate(180deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.3s ease;background:#fff}
.faq-item.open .faq-answer{max-height:300px;padding:0 24px 20px}
.faq-answer p{color:var(--text-weak);line-height:1.7;font-size:0.98rem}
@media(max-width:640px){
  .faq-section h2{font-size:1.4rem}
  .faq-question{font-size:0.95rem;padding:14px 18px}
}
/* cta */
.cta-section{padding:80px 0;background:linear-gradient(135deg,var(--primary),var(--primary-dark));text-align:center;color:#fff}
.cta-section h2{font-size:2.2rem;font-weight:800;margin-bottom:16px}
.cta-section p{font-size:1.15rem;opacity:0.9;max-width:600px;margin:0 auto 32px;line-height:1.7}
.cta-section .btn-cta{background:#fff;color:var(--primary)!important;padding:0.9rem 2.8rem;font-size:1.1rem;border-radius:50px;font-weight:700;box-shadow:0 8px 30px rgba(0,0,0,0.15)}
.cta-section .btn-cta:hover{transform:translateY(-3px);box-shadow:0 12px 40px rgba(0,0,0,0.25);background:var(--secondary);color:#fff!important}
@media(max-width:640px){
  .cta-section{padding:60px 0}
  .cta-section h2{font-size:1.6rem}
  .cta-section p{font-size:1rem}
}
/* footer */
.footer{background:#0f1a2e;color:rgba(255,255,255,0.8);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!important;margin-bottom:16px;font-size:1.4rem}
.footer-brand p{font-size:0.92rem;line-height:1.7;opacity:0.7;max-width:360px}
.footer-social{display:flex;gap:14px;margin-top:20px}
.footer-social a{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,0.08);color:rgba(255,255,255,0.7);transition:var(--transition);font-size:1.2rem}
.footer-social a:hover{background:var(--secondary);color:#fff;transform:translateY(-3px)}
.footer-col h5{font-size:1rem;font-weight:700;color:#fff;margin-bottom:20px;letter-spacing:0.5px}
.footer-col ul{list-style:none;padding:0}
.footer-col ul li{margin-bottom:12px}
.footer-col ul li a{color:rgba(255,255,255,0.6);font-size:0.92rem;transition:var(--transition)}
.footer-col ul li a:hover{color:var(--secondary);padding-left:4px}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;padding:24px 0;font-size:0.85rem;color:rgba(255,255,255,0.4)}
.footer-bottom a{color:rgba(255,255,255,0.5)}
.footer-bottom a:hover{color:var(--secondary)}
@media(max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media(max-width:640px){
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;gap:12px;text-align:center}
}
/* mobile nav fix */
@media(max-width:768px){
  .nav.open{display:flex}
}
/* back to top */
.back-top{position:fixed;bottom:30px;right:30px;width:48px;height:48px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.2rem;box-shadow:0 8px 24px rgba(15,76,129,0.3);z-index:99;transition:var(--transition);opacity:0;pointer-events:none;border:none;cursor:pointer}
.back-top.visible{opacity:1;pointer-events:auto}
.back-top:hover{background:var(--primary-dark);transform:translateY(-4px);box-shadow:0 12px 32px rgba(15,76,129,0.4)}

/* roulang page: category1 */
/* ========== Design Variables ========== */
        :root {
            --primary: #0f7a5c;
            --primary-light: #1ba07a;
            --primary-dark: #0a5d45;
            --primary-bg: #e6f5ef;
            --accent: #f5a623;
            --accent-light: #f8c572;
            --accent-dark: #d48c1a;
            --bg: #f8faf9;
            --bg-alt: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0d2b22;
            --text: #1a2e28;
            --text-light: #4d6b61;
            --text-lighter: #7a9589;
            --border: #d4e3dd;
            --border-light: #e8f0ec;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(15, 122, 92, 0.06);
            --shadow-md: 0 8px 28px rgba(15, 122, 92, 0.10);
            --shadow-lg: 0 20px 48px rgba(15, 122, 92, 0.14);
            --shadow-hover: 0 16px 40px rgba(15, 122, 92, 0.18);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ========== Reset & Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            padding-top: var(--header-h);
        }
        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-light);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2.2rem, 6vw, 3.8rem);
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: clamp(1.6rem, 4vw, 2.6rem);
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.1rem;
        }

        /* ========== Container ========== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* ========== Section Spacing ========== */
        .section {
            padding: 5rem 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: #d4e3dd;
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: #ffffff;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3.5rem;
        }
        .section-header p {
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0.75rem auto 0;
        }
        .section-tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 0.3rem 1.2rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            margin-bottom: 0.75rem;
        }

        @media (max-width: 768px) {
            .section {
                padding: 3rem 0;
            }
            .section-header {
                margin-bottom: 2.5rem;
            }
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            background: transparent;
            color: var(--text);
            justify-content: center;
        }
        .btn i {
            font-size: 1em;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-outline {
            border-color: var(--border);
            color: var(--text);
            background: transparent;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-bg);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-accent {
            background: var(--accent);
            color: #1a2e28;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #1a2e28;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-lg {
            padding: 1rem 2.8rem;
            font-size: 1.05rem;
        }
        .btn-sm {
            padding: 0.45rem 1.2rem;
            font-size: 0.85rem;
        }

        /* ========== Badge / Tag ========== */
        .badge {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 0.2rem 0.9rem;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .badge-accent {
            background: #fef3e0;
            color: var(--accent-dark);
        }
        .badge-sm {
            font-size: 0.7rem;
            padding: 0.15rem 0.7rem;
        }

        /* ========== Card ========== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 1.5rem;
        }
        .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }
        .card-text {
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.6;
            margin-bottom: 1rem;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.8rem;
            color: var(--text-lighter);
        }
        .card-meta i {
            margin-right: 0.25rem;
        }
        .card-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            transition: gap var(--transition);
        }
        .card-link:hover {
            gap: 0.6rem;
            color: var(--primary-dark);
        }

        /* ========== Grid ========== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        @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: 1.5rem;
            }
        }

        /* ========== Header / Nav ========== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 122, 92, 0.08);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
        }
        .logo i {
            font-size: 1.3em;
            color: var(--primary-light);
        }
        .logo:hover {
            color: var(--primary-dark);
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav a {
            display: inline-flex;
            align-items: center;
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 2px 12px rgba(15, 122, 92, 0.25);
        }
        .nav a.active:hover {
            background: var(--primary-dark);
            color: #fff;
        }
        .nav-cta {
            margin-left: 0.75rem;
        }
        .nav-cta .btn {
            padding: 0.5rem 1.5rem;
            font-size: 0.875rem;
            border-radius: 50px;
        }

        /* Mobile nav toggle */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 0.25rem;
            cursor: pointer;
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav {
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 1rem 1.5rem 1.5rem;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s ease;
                border-radius: 0 0 var(--radius) var(--radius);
                gap: 0.5rem;
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav a {
                width: 100%;
                justify-content: center;
                padding: 0.6rem 1rem;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 0.5rem;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
            padding: 4rem 1.5rem;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 43, 34, 0.82) 0%, rgba(13, 43, 34, 0.40) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            color: #fff;
        }
        .hero-content h1 {
            color: #fff;
            font-weight: 800;
            margin-bottom: 0.75rem;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .hero-content p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 2rem;
            line-height: 1.7;
            text-shadow: 0 1px 8px rgba(0, 0, 0, 0.2);
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }
        .hero .btn-outline {
            border-color: rgba(255, 255, 255, 0.4);
            color: #fff;
        }
        .hero .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.6rem;
            margin-top: 2rem;
        }
        .hero-tags span {
            display: inline-block;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            padding: 0.3rem 1.2rem;
            border-radius: 50px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.15);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 380px;
                padding: 3rem 1rem;
            }
            .hero-content p {
                font-size: 1rem;
            }
            .hero-tags span {
                font-size: 0.75rem;
                padding: 0.2rem 1rem;
            }
        }
        @media (max-width: 520px) {
            .hero {
                min-height: 300px;
                padding: 2.5rem 0.75rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 260px;
            }
        }

        /* ========== Intro Block ========== */
        .intro-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .intro-block .intro-image {
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            aspect-ratio: 4 / 3;
            object-fit: cover;
            width: 100%;
        }
        .intro-block .intro-text h3 {
            margin-bottom: 1rem;
        }
        .intro-block .intro-text p {
            color: var(--text-light);
            margin-bottom: 1rem;
            line-height: 1.8;
        }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .intro-features li {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.92rem;
            color: var(--text);
        }
        .intro-features li i {
            color: var(--primary);
            font-size: 1.1rem;
            width: 1.2rem;
        }

        @media (max-width: 768px) {
            .intro-block {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .intro-features {
                grid-template-columns: 1fr;
            }
        }

        /* ========== Category Cards ========== */
        .cat-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            padding: 1.5rem;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            text-align: center;
        }
        .cat-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary-bg);
        }
        .cat-card .cat-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary-bg);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 1rem;
            transition: all var(--transition);
        }
        .cat-card:hover .cat-icon {
            background: var(--primary);
            color: #fff;
        }
        .cat-card h4 {
            margin-bottom: 0.5rem;
        }
        .cat-card p {
            color: var(--text-light);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 1rem;
        }
        .cat-card .badge {
            font-size: 0.7rem;
        }

        /* ========== Stats ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
        }
        .stat-item .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            letter-spacing: -0.02em;
        }
        .stat-item .stat-label {
            color: var(--text-light);
            font-size: 0.92rem;
            margin-top: 0.35rem;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
            .stat-item .stat-number {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.2rem;
            }
        }

        /* ========== Content List ========== */
        .content-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
        }
        .content-item {
            display: flex;
            gap: 1.25rem;
            align-items: flex-start;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 1rem 1.25rem;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .content-item:hover {
            border-color: var(--primary-bg);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }
        .content-item .item-index {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary-bg);
            min-width: 2.4rem;
            line-height: 1.2;
            color: var(--primary);
            opacity: 0.5;
        }
        .content-item .item-body h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.2rem;
        }
        .content-item .item-body p {
            color: var(--text-light);
            font-size: 0.88rem;
            line-height: 1.5;
        }
        .content-item .item-meta {
            display: flex;
            gap: 0.75rem;
            font-size: 0.78rem;
            color: var(--text-lighter);
            margin-top: 0.3rem;
        }

        @media (max-width: 520px) {
            .content-item {
                flex-direction: column;
                gap: 0.5rem;
                padding: 0.9rem 1rem;
            }
            .content-item .item-index {
                font-size: 1.1rem;
                min-width: auto;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-bg);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            padding: 1.2rem 1.5rem;
            background: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            cursor: pointer;
            border: none;
            transition: color var(--transition);
            gap: 1rem;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 1.1rem;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 1.5rem;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.2rem;
        }

        /* ========== CTA ========== */
        .cta-block {
            text-align: center;
            background: linear-gradient(135deg, var(--bg-dark), #0a3d30);
            border-radius: var(--radius-lg);
            padding: 4rem 2.5rem;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .cta-block>* {
            position: relative;
            z-index: 1;
        }
        .cta-block h2 {
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .cta-block p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 540px;
            margin: 0 auto 1.75rem;
            font-size: 1.05rem;
        }
        .cta-block .btn {
            border-color: rgba(255, 255, 255, 0.3);
            color: #fff;
        }
        .cta-block .btn:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.12);
        }
        .cta-block .btn-primary {
            border-color: var(--accent);
            background: var(--accent);
            color: #1a2e28;
        }
        .cta-block .btn-primary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
        }

        @media (max-width: 768px) {
            .cta-block {
                padding: 2.5rem 1.5rem;
            }
        }

        /* ========== Footer ========== */
        .footer {
            background: var(--bg-dark);
            color: #bcd3cb;
            padding: 4rem 0 1.5rem;
        }
        .footer .logo {
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer .logo i {
            color: var(--primary-light);
        }
        .footer p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #9ab8ad;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand p {
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 1rem;
            margin-top: 1.25rem;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: #bcd3cb;
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        .footer-col ul li a {
            color: #9ab8ad;
            font-size: 0.88rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 0.75rem;
            font-size: 0.82rem;
            color: #7a9e92;
        }
        .footer-bottom a {
            color: #9ab8ad;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ========== Utility ========== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .gap-1 {
            gap: 1rem;
        }
        .gap-2 {
            gap: 2rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* ========== Responsive fine-tune ========== */
        @media (max-width: 1024px) {
            :root {
                --header-h: 64px;
            }
        }
        @media (max-width: 520px) {
            :root {
                --header-h: 60px;
            }
            .hero-content h1 {
                font-size: 1.9rem;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .card-body {
                padding: 1.1rem;
            }
        }

        /* ========== Scrollbar ========== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-lighter);
        }

        /* ========== Image placeholder fallback ========== */
        .img-bg-cover {
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }