/* roulang page: index */
:root {
  --primary: #1B4332;
  --primary-dark: #0D2B1D;
  --primary-light: #2D6A4F;
  --accent: #D4A017;
  --accent-hover: #C4950F;
  --accent-active: #A87D0C;
  --bg-light: #F7F5F0;
  --bg-card: #FFFFFF;
  --bg-dark: #0D2B1D;
  --text-dark: #1B4332;
  --text-body: #2D3A3A;
  --text-muted: #6B7B7B;
  --text-light: #F7F5F0;
  --border-color: rgba(27,67,50,0.08);
  --border-strong: rgba(27,67,50,0.2);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 4px 20px rgba(27,67,50,0.06);
  --shadow-hover: 0 8px 32px rgba(27,67,50,0.12);
  --shadow-button: 0 4px 14px rgba(212,160,23,0.3);
  --transition: 0.25s ease;
  --font-stack: "PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --max-width: 1200px;
  --nav-width: 240px;
  --gap: 24px;
  --section-padding: 80px 0;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-stack);font-size:15px;line-height:1.8;color:var(--text-body);background:var(--bg-light);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:var(--transition)}
img{max-width:100%;height:auto;display:block}
button,input,textarea,select{font-family:inherit;font-size:inherit;transition:var(--transition)}
ul{list-style:none}
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px;width:100%}
.section-title{font-size:30px;font-weight:700;color:var(--text-dark);text-align:center;margin-bottom:12px;letter-spacing:0.02em}
.section-subtitle{font-size:16px;color:var(--text-muted);text-align:center;max-width:680px;margin:0 auto 48px;line-height:1.7}

/* Navigation – left sidebar */
.site-wrapper{display:flex;min-height:100vh}
.sidebar{width:var(--nav-width);background:var(--primary);color:#fff;position:fixed;top:0;left:0;bottom:0;z-index:1000;display:flex;flex-direction:column;padding:0;overflow-y:auto}
.sidebar-brand{padding:32px 20px 24px;border-bottom:1px solid rgba(255,255,255,0.08)}
.sidebar-logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;color:#fff;letter-spacing:0.02em}
.sidebar-logo .logo-dot{width:10px;height:10px;background:var(--accent);border-radius:50%;display:inline-block;flex-shrink:0}
.sidebar-logo span{color:var(--accent)}
.sidebar-nav{flex:1;padding:16px 0}
.sidebar-nav a{display:flex;align-items:center;gap:12px;padding:14px 24px;color:rgba(255,255,255,0.75);font-size:15px;font-weight:500;border-left:4px solid transparent;transition:var(--transition)}
.sidebar-nav a i{width:20px;text-align:center;font-size:16px}
.sidebar-nav a:hover{background:rgba(255,255,255,0.08);color:#fff}
.sidebar-nav a.active{border-left-color:var(--accent);background:rgba(212,160,23,0.12);color:#fff;font-weight:600}
.sidebar-contact{padding:20px 24px;border-top:1px solid rgba(255,255,255,0.08);font-size:13px;color:rgba(255,255,255,0.5);line-height:1.6}
.sidebar-contact i{margin-right:8px;width:16px}
.main-content{margin-left:var(--nav-width);flex:1;min-width:0}

/* Mobile nav */
.mobile-header{display:none;background:var(--primary);padding:12px 20px;position:fixed;top:0;left:0;right:0;z-index:999;align-items:center;justify-content:space-between}
.mobile-header .sidebar-logo{font-size:20px}
.mobile-toggle{background:none;border:none;color:#fff;font-size:26px;cursor:pointer;padding:4px 8px;border-radius:4px}
.mobile-toggle:hover{background:rgba(255,255,255,0.1)}
.mobile-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);z-index:998}
.mobile-overlay.open{display:block}
@media(max-width:768px){
  .sidebar{transform:translateX(-100%);transition:transform 0.3s ease;width:280px}
  .sidebar.open{transform:translateX(0)}
  .main-content{margin-left:0;padding-top:60px}
  .mobile-header{display:flex}
}

/* Hero */
.hero{background:var(--bg-dark);padding:100px 0 80px;position:relative;overflow:hidden;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;background-blend-mode:overlay;background-color:rgba(13,43,29,0.82)}
.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,rgba(13,43,29,0.88) 40%,rgba(27,67,50,0.6) 100%);z-index:1}
.hero .container{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.hero-left{padding-right:20px}
.hero-badge{display:inline-block;background:rgba(212,160,23,0.15);color:var(--accent);font-size:13px;font-weight:600;padding:6px 16px;border-radius:20px;margin-bottom:20px;letter-spacing:0.04em;border:1px solid rgba(212,160,23,0.25)}
.hero h1{font-size:40px;font-weight:800;color:#fff;line-height:1.25;letter-spacing:0.02em;margin-bottom:20px}
.hero h1 .highlight{color:var(--accent)}
.hero p{font-size:17px;color:rgba(255,255,255,0.8);line-height:1.8;margin-bottom:32px;max-width:520px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:var(--radius-sm);font-weight:600;font-size:15px;cursor:pointer;border:none;transition:var(--transition);text-align:center;justify-content:center}
.btn-primary{background:var(--accent);color:var(--primary);box-shadow:var(--shadow-button)}
.btn-primary:hover{background:var(--accent-hover);box-shadow:0 6px 20px rgba(212,160,23,0.4);transform:translateY(-2px)}
.btn-primary:active{background:var(--accent-active);transform:translateY(0)}
.btn-secondary{background:transparent;color:#fff;border:1px solid rgba(255,255,255,0.3)}
.btn-secondary:hover{background:rgba(255,255,255,0.1);border-color:var(--accent);color:var(--accent)}
.btn-outline{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.btn-outline:hover{background:rgba(212,160,23,0.08)}
.hero-right{display:flex;justify-content:center;align-items:center}
.hero-image-wrap{width:100%;border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 16px 48px rgba(0,0,0,0.3);background:var(--primary-dark)}
.hero-image-wrap img{width:100%;height:auto;display:block;min-height:260px;object-fit:cover}
@media(max-width:768px){
  .hero{padding:60px 0 48px}
  .hero .container{grid-template-columns:1fr;gap:32px}
  .hero-left{padding-right:0}
  .hero h1{font-size:30px}
  .hero p{font-size:15px}
  .hero-actions{flex-direction:column}
  .btn{width:100%;justify-content:center}
}

/* Stats / trust band */
.stats-band{background:var(--bg-card);padding:40px 0;border-bottom:1px solid var(--border-color)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);text-align:center}
.stat-item h3{font-size:36px;font-weight:800;color:var(--primary);letter-spacing:0.02em}
.stat-item p{font-size:14px;color:var(--text-muted);margin-top:4px}
.stat-item .stat-icon{color:var(--accent);font-size:28px;margin-bottom:8px}
@media(max-width:768px){
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .stat-item h3{font-size:28px}
}

/* Features / 核心优势 */
.features{background:var(--bg-light);padding:var(--section-padding)}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.feature-card{background:var(--bg-card);border-radius:var(--radius-md);padding:32px 28px;box-shadow:var(--shadow-sm);transition:var(--transition);border:1px solid var(--border-color)}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.feature-icon{width:56px;height:56px;background:rgba(27,67,50,0.08);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:26px;color:var(--primary);margin-bottom:18px}
.feature-card h3{font-size:20px;font-weight:700;color:var(--text-dark);margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-muted);line-height:1.7}
@media(max-width:768px){
  .features-grid{grid-template-columns:1fr;gap:16px}
  .feature-card{padding:24px 20px}
}

/* Pricing / 优惠阶梯 */
.pricing{background:var(--bg-card);padding:var(--section-padding)}
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.pricing-card{background:var(--bg-light);border-radius:var(--radius-md);padding:36px 28px;box-shadow:var(--shadow-sm);transition:var(--transition);border:1px solid var(--border-color);position:relative;overflow:hidden}
.pricing-card.featured{border-color:var(--accent);box-shadow:0 8px 32px rgba(212,160,23,0.12)}
.pricing-card.featured::before{content:'推荐';position:absolute;top:16px;right:-32px;background:var(--accent);color:var(--primary);font-size:12px;font-weight:700;padding:4px 40px;transform:rotate(45deg)}
.pricing-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.pricing-tier{font-size:14px;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:0.06em;margin-bottom:8px}
.pricing-card h3{font-size:24px;font-weight:700;color:var(--text-dark);margin-bottom:6px}
.pricing-desc{font-size:14px;color:var(--text-muted);margin-bottom:20px}
.pricing-price{font-size:32px;font-weight:800;color:var(--primary);margin-bottom:20px}
.pricing-price span{font-size:16px;font-weight:400;color:var(--text-muted)}
.pricing-features{list-style:none;padding:0;margin-bottom:28px}
.pricing-features li{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--border-color);font-size:14px;color:var(--text-body)}
.pricing-features li:last-child{border-bottom:none}
.pricing-features li i{color:var(--accent);font-size:14px;width:16px;text-align:center}
.pricing .btn{width:100%;justify-content:center}
@media(max-width:768px){
  .pricing-grid{grid-template-columns:1fr;gap:20px}
  .pricing-card{padding:28px 20px}
}

/* Comparison table */
.comparison{background:var(--bg-light);padding:var(--section-padding)}
.comparison-table{width:100%;border-collapse:collapse;background:var(--bg-card);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm)}
.comparison-table thead{background:var(--primary);color:#fff}
.comparison-table th{padding:18px 20px;font-size:15px;font-weight:600;text-align:center;border-right:1px solid rgba(255,255,255,0.08)}
.comparison-table th:first-child{text-align:left;background:var(--primary-dark)}
.comparison-table td{padding:16px 20px;font-size:14px;text-align:center;border-bottom:1px solid var(--border-color)}
.comparison-table td:first-child{text-align:left;font-weight:600;color:var(--text-dark)}
.comparison-table tbody tr:nth-child(even){background:var(--bg-light)}
.comparison-table tbody tr:hover{background:rgba(212,160,23,0.06)}
.comparison-table td i{font-size:16px}
.comparison-table td .fa-check{color:#2D6A4F}
.comparison-table td .fa-times{color:#B00020}
.comparison-table td .fa-star{color:var(--accent)}
.comparison-cta{text-align:center;margin-top:32px}
@media(max-width:768px){
  .comparison-table{font-size:13px;display:block;overflow-x:auto;white-space:nowrap}
  .comparison-table th,.comparison-table td{padding:12px 14px}
}

/* Countdown / 限时入口 */
.countdown-section{background:var(--bg-dark);padding:72px 0;text-align:center;position:relative;overflow:hidden;background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;background-blend-mode:overlay;background-color:rgba(13,43,29,0.85)}
.countdown-section::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse at center,rgba(212,160,23,0.06) 0%,transparent 70%);z-index:1}
.countdown-section .container{position:relative;z-index:2}
.countdown-badge{display:inline-block;background:var(--bg-card);color:var(--accent);font-size:13px;font-weight:700;padding:6px 20px;border-radius:20px;margin-bottom:20px;letter-spacing:0.04em}
.countdown-section h2{font-size:34px;font-weight:800;color:#fff;margin-bottom:12px;letter-spacing:0.02em}
.countdown-section p{font-size:16px;color:rgba(255,255,255,0.7);margin-bottom:28px}
.countdown-timer{display:flex;justify-content:center;gap:20px;margin-bottom:36px;flex-wrap:wrap}
.countdown-block{background:rgba(255,255,255,0.08);border-radius:var(--radius-sm);padding:16px 24px;min-width:80px;backdrop-filter:blur(4px)}
.countdown-block .num{font-size:42px;font-weight:800;color:var(--accent);line-height:1;display:block}
.countdown-block .label{font-size:12px;color:rgba(255,255,255,0.6);margin-top:6px;display:block}
.countdown-section .btn-primary{font-size:16px;padding:16px 40px}
@media(max-width:768px){
  .countdown-section h2{font-size:26px}
  .countdown-block{padding:12px 16px;min-width:60px}
  .countdown-block .num{font-size:30px}
}

/* News / CMS */
.news{background:var(--bg-card);padding:var(--section-padding)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.news-card{background:var(--bg-light);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);transition:var(--transition);border:1px solid var(--border-color)}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.news-card-img{height:180px;background:var(--primary-dark);overflow:hidden}
.news-card-img img{width:100%;height:100%;object-fit:cover}
.news-card-body{padding:20px 22px 24px}
.news-tag{display:inline-block;background:rgba(212,160,23,0.12);color:var(--accent);font-size:12px;font-weight:600;padding:2px 12px;border-radius:12px;margin-bottom:10px}
.news-card-body h4{font-size:16px;font-weight:600;color:var(--text-dark);margin-bottom:8px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card-body p{font-size:13px;color:var(--text-muted);line-height:1.6;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--text-muted)}
.news-meta a{color:var(--accent);font-weight:600}
.news-meta a:hover{text-decoration:underline}
.news-empty{padding:40px 24px;background:var(--bg-light);border-radius:var(--radius-md);text-align:center;color:var(--text-muted);font-size:15px;grid-column:1/-1}
@media(max-width:768px){
  .news-grid{grid-template-columns:1fr;gap:16px}
}

/* Contact / 咨询表单 */
.contact{background:var(--bg-light);padding:var(--section-padding)}
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-left h2{font-size:28px;font-weight:700;color:var(--text-dark);margin-bottom:16px;line-height:1.3}
.contact-left p{font-size:15px;color:var(--text-muted);line-height:1.8;margin-bottom:12px}
.contact-left .benefits{list-style:none;padding:0;margin-top:20px}
.contact-left .benefits li{display:flex;align-items:center;gap:12px;padding:10px 0;font-size:15px;color:var(--text-body)}
.contact-left .benefits li i{color:var(--accent);font-size:18px;width:20px;text-align:center}
.contact-form-card{background:var(--bg-card);padding:36px 32px;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);border:1px solid var(--border-color)}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-size:13px;font-weight:600;color:var(--text-muted);margin-bottom:6px}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 16px;border:none;border-bottom:2px solid var(--border-strong);background:var(--bg-light);border-radius:4px 4px 0 0;font-size:14px;color:var(--text-dark);outline:none;transition:var(--transition)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-bottom-color:var(--accent);background:rgba(212,160,23,0.04)}
.form-group textarea{resize:vertical;min-height:80px}
.contact .btn-primary{width:100%;justify-content:center;padding:14px}
@media(max-width:768px){
  .contact-wrap{grid-template-columns:1fr;gap:32px}
  .contact-form-card{padding:24px 20px}
}

/* FAQ */
.faq{background:var(--bg-card);padding:var(--section-padding)}
.faq-list{max-width:760px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border-color);padding:0}
.faq-question{display:flex;justify-content:space-between;align-items:center;padding:20px 0;cursor:pointer;font-size:16px;font-weight:600;color:var(--text-dark);background:none;border:none;width:100%;text-align:left;gap:16px}
.faq-question i{font-size:14px;color:var(--accent);transition:transform 0.3s ease;flex-shrink:0}
.faq-item.open .faq-question i{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.3s ease;padding:0}
.faq-item.open .faq-answer{max-height:300px;padding:0 0 20px}
.faq-answer p{font-size:14px;color:var(--text-muted);line-height:1.8}

/* Footer */
.footer{background:var(--bg-dark);color:rgba(255,255,255,0.7);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.08)}
.footer-brand .sidebar-logo{margin-bottom:14px}
.footer-brand p{font-size:14px;line-height:1.7;color:rgba(255,255,255,0.55);max-width:320px}
.footer-col h4{font-size:16px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;color:rgba(255,255,255,0.55);transition:var(--transition)}
.footer-col ul li a:hover{color:var(--accent)}
.footer-contact li{display:flex;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,0.55);padding:6px 0}
.footer-contact li i{width:18px;color:var(--accent);text-align:center}
.footer-bottom{padding:20px 0;text-align:center;font-size:13px;color:rgba(255,255,255,0.35)}
@media(max-width:768px){
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-brand p{max-width:100%}
}

/* Toast */
.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(80px);background:var(--primary);color:#fff;padding:14px 32px;border-radius:var(--radius-sm);box-shadow:0 8px 32px rgba(0,0,0,0.2);font-size:15px;font-weight:600;opacity:0;transition:all 0.4s ease;z-index:9999;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Responsive extras */
@media(max-width:480px){
  .hero h1{font-size:26px}
  .section-title{font-size:24px}
  .pricing-price{font-size:26px}
  .countdown-block .num{font-size:24px}
}

/* Accessibility */
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
  --primary: #1B4332;
  --primary-dark: #0D2B1D;
  --primary-light: #2D5A4A;
  --accent: #D4A017;
  --accent-hover: #C4950F;
  --accent-active: #A87D0C;
  --bg-light: #F7F5F0;
  --bg-card: #ffffff;
  --text-dark: #1a1a1a;
  --text-body: #2d2d2d;
  --text-muted: #6b7280;
  --text-light: #9ca3af;
  --border-color: rgba(27,67,50,0.08);
  --border-input: rgba(27,67,50,0.2);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 4px 20px rgba(27,67,50,0.06);
  --shadow-md: 0 8px 32px rgba(27,67,50,0.12);
  --shadow-lg: 0 16px 48px rgba(27,67,50,0.18);
  --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --max-width: 1200px;
  --content-width: 800px;
  --sidebar-width: 240px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-stack);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-body);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
button { cursor: pointer; background: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-dark); }
h1 { font-size: 36px; letter-spacing: 0.02em; }
h2 { font-size: 28px; }
h3 { font-size: 20px; }
h4 { font-size: 16px; font-weight: 600; }
p { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.content-narrow { max-width: var(--content-width); margin: 0 auto; padding: 0 24px; }

/* ===== Layout: Sidebar + Main ===== */
.app-wrapper { display: flex; min-height: 100vh; }

/* ===== Sidebar Navigation ===== */
.sidebar {
  position: fixed; top: 0; left: 0; width: var(--sidebar-width); height: 100vh;
  background: var(--primary); color: #fff; z-index: 1000;
  display: flex; flex-direction: column; overflow-y: auto;
  transition: transform var(--transition);
}
.sidebar-brand {
  padding: 28px 20px 20px; border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 22px; font-weight: 700; color: #fff;
}
.sidebar-logo span { color: var(--accent); }
.logo-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent); display: inline-block;
  box-shadow: 0 0 12px rgba(212,160,23,0.5);
}
.sidebar-brand p { font-size: 12px; color: rgba(255,255,255,0.5); margin-top: 6px; line-height: 1.5; }
.sidebar-nav { flex: 1; padding: 20px 0; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 24px; color: rgba(255,255,255,0.75);
  font-size: 15px; font-weight: 500; transition: var(--transition);
  border-left: 4px solid transparent; position: relative;
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; }
.sidebar-nav a:hover { background: rgba(255,255,255,0.06); color: #fff; }
.sidebar-nav a.active {
  background: rgba(255,255,255,0.08); color: #fff;
  border-left-color: var(--accent); font-weight: 600;
}
.sidebar-nav a.active::after {
  content: ''; position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  width: 3px; height: 24px; background: var(--accent); border-radius: 3px 0 0 3px;
}
.sidebar-footer {
  padding: 20px 24px; border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 12px; color: rgba(255,255,255,0.4); line-height: 1.6;
}
.sidebar-footer i { margin-right: 6px; width: 14px; }

/* ===== Main Content Area ===== */
.main-content {
  margin-left: var(--sidebar-width); flex: 1; min-height: 100vh;
  padding: 0; transition: var(--transition);
}

/* ===== Article Page ===== */
.article-page { padding: 40px 0 60px; }
.article-breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text-muted); margin-bottom: 20px; flex-wrap: wrap;
}
.article-breadcrumb a { color: var(--text-muted); }
.article-breadcrumb a:hover { color: var(--accent); }
.article-breadcrumb .sep { color: var(--accent); font-weight: 300; }
.article-breadcrumb .current { color: var(--primary); font-weight: 500; }
.article-header { margin-bottom: 32px; }
.article-header h1 {
  font-size: 36px; font-weight: 700; color: var(--primary);
  line-height: 1.3; margin-bottom: 16px;
}
.article-meta {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  font-size: 13px; color: var(--text-muted);
}
.article-meta i { margin-right: 4px; }
.article-meta .meta-item { display: flex; align-items: center; gap: 4px; }
.article-meta .category-tag {
  display: inline-block; padding: 2px 12px; border-radius: 20px;
  background: rgba(212,160,23,0.12); color: var(--accent);
  font-size: 12px; font-weight: 600;
}
.article-featured-image {
  margin-bottom: 32px; border-radius: var(--radius-md); overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.article-featured-image img { width: 100%; height: auto; display: block; }
.article-body {
  font-size: 16px; line-height: 2.0; color: var(--text-body);
}
.article-body p { margin-bottom: 28px; }
.article-body h2, .article-body h3 { margin-top: 36px; margin-bottom: 16px; color: var(--primary); }
.article-body h2 { font-size: 26px; }
.article-body h3 { font-size: 20px; }
.article-body img {
  width: 100%; border-radius: var(--radius-md); box-shadow: var(--shadow-sm);
  margin: 24px 0;
}
.article-body blockquote {
  margin: 24px 0; padding: 20px 24px; border-left: 4px solid var(--accent);
  background: rgba(212,160,23,0.06); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic; color: var(--text-muted); font-size: 15px;
}
.article-body ul, .article-body ol { margin: 20px 0; padding-left: 24px; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 8px; line-height: 1.8; }
.article-body a { color: var(--accent); border-bottom: 1px solid transparent; }
.article-body a:hover { border-bottom-color: var(--accent); color: var(--accent-hover); }
.article-body code {
  background: rgba(27,67,50,0.06); padding: 2px 8px; border-radius: 4px;
  font-size: 14px; font-family: 'Consolas', 'Monaco', monospace;
}
.article-body pre {
  background: var(--primary); color: #e2e8f0; padding: 20px 24px;
  border-radius: var(--radius-md); overflow-x: auto; margin: 24px 0;
  font-size: 14px; line-height: 1.6;
}
.article-body pre code { background: none; padding: 0; color: inherit; }

/* ===== Article Footer ===== */
.article-footer { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border-color); }
.article-tags {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 24px;
}
.article-tags .tag-label { font-size: 13px; color: var(--text-muted); font-weight: 500; }
.article-tags .tag-item {
  display: inline-block; padding: 4px 14px; border-radius: 20px;
  background: rgba(27,67,50,0.06); color: var(--primary); font-size: 13px;
  transition: var(--transition);
}
.article-tags .tag-item:hover { background: var(--primary); color: #fff; }
.article-share {
  display: flex; align-items: center; gap: 12px; margin-bottom: 24px;
}
.article-share .share-label { font-size: 13px; color: var(--text-muted); }
.article-share a {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-light); color: var(--text-muted);
  transition: var(--transition); font-size: 14px;
}
.article-share a:hover { background: var(--accent); color: #fff; }
.article-nav {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  margin-top: 24px;
}
.article-nav a {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  background: var(--bg-light); color: var(--text-body);
  font-size: 14px; font-weight: 500; transition: var(--transition);
}
.article-nav a:hover { background: var(--primary); color: #fff; }
.article-nav a i { font-size: 12px; }

/* ===== Related Posts ===== */
.related-posts { margin-top: 60px; padding-top: 40px; border-top: 1px solid var(--border-color); }
.related-posts h3 {
  font-size: 24px; color: var(--primary); margin-bottom: 24px;
  display: flex; align-items: center; gap: 12px;
}
.related-posts h3::after {
  content: ''; flex: 1; height: 1px; background: var(--border-color);
}
.related-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.related-card {
  background: var(--bg-card); border-radius: var(--radius-md);
  overflow: hidden; box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.related-card .card-img {
  width: 100%; height: 180px; object-fit: cover;
}
.related-card .card-body { padding: 16px 20px 20px; }
.related-card .card-body h4 {
  font-size: 15px; font-weight: 600; color: var(--text-dark);
  line-height: 1.5; margin-bottom: 8px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .card-body h4 a { color: var(--text-dark); }
.related-card .card-body h4 a:hover { color: var(--accent); }
.related-card .card-meta {
  font-size: 12px; color: var(--text-light);
  display: flex; align-items: center; gap: 12px;
}
.related-card .card-meta i { margin-right: 4px; }

/* ===== Not Found ===== */
.article-notfound {
  text-align: center; padding: 80px 24px;
}
.article-notfound .notfound-icon {
  font-size: 64px; color: var(--text-light); margin-bottom: 20px;
}
.article-notfound h2 { font-size: 24px; color: var(--primary); margin-bottom: 12px; }
.article-notfound p { color: var(--text-muted); margin-bottom: 24px; }
.article-notfound .btn-back {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 32px; border-radius: var(--radius-sm);
  background: var(--primary); color: #fff; font-weight: 500;
  transition: var(--transition);
}
.article-notfound .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ===== CTA Section ===== */
.article-cta {
  margin-top: 60px; padding: 48px; border-radius: var(--radius-lg);
  background: var(--primary-dark); color: #fff;
  text-align: center; position: relative; overflow: hidden;
}
.article-cta::before {
  content: ''; position: absolute; top: -50%; right: -20%;
  width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(212,160,23,0.08) 0%, transparent 70%);
}
.article-cta::after {
  content: ''; position: absolute; bottom: -30%; left: -10%;
  width: 300px; height: 300px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, transparent 70%);
}
.article-cta h3 { font-size: 28px; color: #fff; margin-bottom: 12px; position: relative; }
.article-cta p { color: rgba(255,255,255,0.7); font-size: 16px; margin-bottom: 24px; position: relative; }
.article-cta .cta-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 40px; border-radius: var(--radius-sm);
  background: var(--accent); color: var(--primary);
  font-weight: 700; font-size: 16px; transition: var(--transition);
  position: relative;
}
.article-cta .cta-btn:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,160,23,0.3); }

/* ===== Footer ===== */
.footer {
  background: var(--primary-dark); color: rgba(255,255,255,0.7);
  padding: 60px 0 0; margin-left: var(--sidebar-width);
}
.footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1.2fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .sidebar-logo { margin-bottom: 16px; }
.footer-brand p { font-size: 13px; line-height: 1.8; color: rgba(255,255,255,0.5); max-width: 360px; }
.footer-col h4 { font-size: 16px; color: #fff; margin-bottom: 20px; font-weight: 600; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: rgba(255,255,255,0.5); font-size: 14px; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact li { display: flex; align-items: center; gap: 10px; color: rgba(255,255,255,0.5); font-size: 14px; }
.footer-contact li i { width: 16px; color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0; text-align: center;
  font-size: 13px; color: rgba(255,255,255,0.35);
}

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed; bottom: 32px; right: 32px; z-index: 999;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden;
  transition: var(--transition); cursor: pointer;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--accent); color: var(--primary); transform: translateY(-4px); }

/* ===== Mobile Toggle ===== */
.mobile-toggle {
  display: none; position: fixed; top: 16px; left: 16px; z-index: 1100;
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  background: var(--primary); color: #fff;
  align-items: center; justify-content: center; font-size: 18px;
  box-shadow: var(--shadow-md); cursor: pointer;
}
.mobile-toggle:hover { background: var(--primary-light); }
.mobile-overlay {
  display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.5); z-index: 999;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --sidebar-width: 0px; }
  .mobile-toggle { display: flex; }
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .mobile-overlay.open { display: block; }
  .main-content { margin-left: 0; padding-top: 0; }
  .footer { margin-left: 0; }
  .article-page { padding: 24px 0 40px; }
  .article-header h1 { font-size: 28px; }
  .article-body { font-size: 15px; }
  .related-grid { grid-template-columns: 1fr; }
  .related-card .card-img { height: 200px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .article-cta { padding: 32px 24px; }
  .article-cta h3 { font-size: 22px; }
  .article-nav { flex-direction: column; }
  .article-nav a { justify-content: center; }
  .back-to-top { bottom: 20px; right: 20px; width: 38px; height: 38px; font-size: 14px; }
  .article-breadcrumb { font-size: 12px; }
  .article-meta { font-size: 12px; gap: 12px; }
}

@media (max-width: 520px) {
  .article-header h1 { font-size: 24px; }
  .article-body { font-size: 14px; }
  .article-body blockquote { padding: 16px 18px; font-size: 14px; }
  .article-cta { padding: 24px 16px; }
  .article-cta h3 { font-size: 20px; }
  .article-cta .cta-btn { width: 100%; justify-content: center; padding: 12px 24px; }
  .related-card .card-img { height: 160px; }
  .content-narrow { padding: 0 16px; }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.article-header { animation: fadeInUp 0.6s ease-out; }
.article-featured-image { animation: fadeInUp 0.6s ease-out 0.1s both; }
.article-body { animation: fadeInUp 0.6s ease-out 0.2s both; }
.article-footer { animation: fadeInUp 0.6s ease-out 0.3s both; }
.related-posts { animation: fadeInUp 0.6s ease-out 0.4s both; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1B4332;
            --primary-dark: #0D2B1D;
            --primary-light: #2D6A4F;
            --accent: #D4A017;
            --accent-hover: #C4950F;
            --accent-active: #A87D0C;
            --bg-light: #F7F5F0;
            --bg-cream: #EDE8DC;
            --white: #FFFFFF;
            --text-dark: #1B4332;
            --text-body: #3A3A3A;
            --text-muted: #7A7A7A;
            --text-light: #B8B8B8;
            --border-color: rgba(27, 67, 50, 0.08);
            --shadow-sm: 0 4px 20px rgba(27, 67, 50, 0.06);
            --shadow-hover: 0 8px 32px rgba(27, 67, 50, 0.12);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-lg: 16px;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --max-width: 1200px;
            --sidebar-width: 240px;
            --gap: 24px;
            --section-gap: 80px;
            --section-gap-mobile: 48px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-body);
            background: var(--bg-light);
            display: flex;
            min-height: 100vh;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }
        button,
        input,
        select,
        textarea {
            font-family: var(--font-stack);
            font-size: 14px;
            outline: none;
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            font-weight: 700;
            line-height: 1.3;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
            width: 100%;
        }

        /* ===== Layout ===== */
        .app-wrapper {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }

        /* ===== Sidebar Navigation (Desktop) ===== */
        .sidebar {
            width: var(--sidebar-width);
            background: var(--primary);
            color: var(--white);
            display: flex;
            flex-direction: column;
            position: fixed;
            top: 0;
            left: 0;
            height: 100vh;
            z-index: 1000;
            overflow-y: auto;
            padding: 32px 0 24px;
            transition: transform 0.3s;
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--white);
            padding: 0 24px 28px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }
        .sidebar-logo .logo-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            background: var(--accent);
            border-radius: 50%;
            flex-shrink: 0;
        }
        .sidebar-logo span {
            font-weight: 300;
            color: var(--accent);
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 0 12px;
            flex: 1;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.78);
            transition: background 0.2s, color 0.2s, border-color 0.2s;
            border-left: 4px solid transparent;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: rgba(255, 255, 255, 0.5);
            transition: color 0.2s;
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: var(--white);
        }
        .sidebar-nav a:hover i {
            color: var(--accent);
        }
        .sidebar-nav a.active {
            background: rgba(255, 255, 255, 0.06);
            color: var(--white);
            border-left-color: var(--accent);
        }
        .sidebar-nav a.active i {
            color: var(--accent);
        }
        .sidebar-footer-info {
            padding: 20px 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 16px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
            line-height: 1.6;
        }
        .sidebar-footer-info i {
            margin-right: 6px;
            color: var(--accent);
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 60px;
            background: var(--primary);
            z-index: 1100;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .mobile-header .sidebar-logo {
            padding: 0;
            margin: 0;
            border: none;
            font-size: 20px;
        }
        .mobile-hamburger {
            background: none;
            border: none;
            color: var(--white);
            font-size: 26px;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 4px;
        }
        .mobile-hamburger:focus {
            outline: 2px solid var(--accent);
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1050;
        }
        .mobile-overlay.active {
            display: block;
        }
        .sidebar.mobile-open {
            transform: translateX(0);
        }

        /* ===== Main Content ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== Hero ===== */
        .hero {
            background: var(--primary-dark);
            color: var(--white);
            padding: 100px 0 80px;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 45%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.webp') no-repeat center center/cover;
            opacity: 0.25;
            mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.6), transparent);
            -webkit-mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.6), transparent);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 48px;
        }
        .hero-text {
            flex: 0 0 55%;
            max-width: 55%;
        }
        .hero-text h1 {
            font-size: 42px;
            font-weight: 800;
            color: var(--white);
            letter-spacing: 0.02em;
            line-height: 1.25;
            margin-bottom: 20px;
        }
        .hero-text h1 .highlight {
            color: var(--accent);
        }
        .hero-text .subtitle {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 32px;
            max-width: 600px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-image {
            flex: 0 0 42%;
            max-width: 42%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
        }
        .hero-image img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-lg);
        }
        .hero-decoration {
            position: absolute;
            left: 0;
            top: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(to bottom, var(--accent), var(--primary-light));
            opacity: 0.6;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s, box-shadow 0.3s;
            text-align: center;
            min-width: 120px;
            letter-spacing: 0.01em;
        }
        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(212, 160, 23, 0.3);
        }
        .btn-primary:active {
            background: var(--accent-active);
            transform: translateY(0);
        }
        .btn-secondary {
            background: transparent;
            color: var(--white);
            border: 1px solid rgba(255, 255, 255, 0.3);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent);
            color: var(--accent);
        }
        .btn-secondary:active {
            background: rgba(255, 255, 255, 0.12);
        }
        .btn-dark {
            background: var(--primary);
            color: var(--white);
        }
        .btn-dark:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(27, 67, 50, 0.25);
        }
        .btn-dark:active {
            background: var(--primary-dark);
        }
        .btn-outline-accent {
            background: transparent;
            color: var(--accent);
            border: 1px solid var(--accent);
        }
        .btn-outline-accent:hover {
            background: rgba(212, 160, 23, 0.08);
            transform: translateY(-1px);
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-dark);
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: 0.01em;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section.bg-white {
            background: var(--white);
        }
        .section.bg-cream {
            background: var(--bg-cream);
        }
        .section.bg-dark {
            background: var(--primary-dark);
            color: var(--white);
        }
        .section.bg-dark .section-title {
            color: var(--white);
        }
        .section.bg-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.65);
        }

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

        /* ===== Cards ===== */
        .card {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s, box-shadow 0.3s;
            border: 1px solid var(--border-color);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .card .card-icon {
            font-size: 32px;
            color: var(--accent);
            margin-bottom: 16px;
        }
        .card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-dark);
        }
        .card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .card .badge {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(212, 160, 23, 0.12);
            color: var(--accent);
            margin-bottom: 12px;
        }

        /* ===== Badge ===== */
        .badge-gold {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(212, 160, 23, 0.15);
            color: var(--accent);
        }
        .badge-green {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(27, 67, 50, 0.1);
            color: var(--primary);
        }

        /* ===== Feature / Advantage ===== */
        .advantage-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: var(--gap);
        }

        /* ===== Scenario ===== */
        .scenario-list {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: var(--gap);
        }
        .scenario-item {
            background: var(--white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s, box-shadow 0.3s;
            border: 1px solid var(--border-color);
        }
        .scenario-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .scenario-item .scenario-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .scenario-item .scenario-body {
            padding: 20px 20px 24px;
        }
        .scenario-item .scenario-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .scenario-item .scenario-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Process / Steps ===== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
            counter-reset: step;
        }
        .process-step {
            text-align: center;
            padding: 32px 16px;
            background: var(--white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            position: relative;
            transition: transform 0.3s;
        }
        .process-step:hover {
            transform: translateY(-4px);
        }
        .process-step .step-num {
            counter-increment: step;
            content: counter(step);
            width: 48px;
            height: 48px;
            line-height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--white);
            font-size: 20px;
            font-weight: 700;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .process-step .step-num.gold {
            background: var(--accent);
            color: var(--primary);
        }
        .process-step h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .process-step::after {
            content: '→';
            position: absolute;
            right: -16px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 24px;
            color: var(--accent);
            font-weight: 300;
        }
        .process-step:last-child::after {
            display: none;
        }

        /* ===== Pricing / Plan Comparison ===== */
        .pricing-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: var(--gap);
            align-items: start;
        }
        .pricing-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 2px solid transparent;
            transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
        }
        .pricing-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .pricing-card.featured {
            border-color: var(--accent);
            transform: scale(1.03);
        }
        .pricing-card.featured:hover {
            transform: scale(1.03) translateY(-6px);
        }
        .pricing-card .pricing-header {
            padding: 28px 24px 20px;
            text-align: center;
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-color);
        }
        .pricing-card .pricing-header h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .pricing-card .pricing-header .price {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
        }
        .pricing-card .pricing-header .price span {
            font-size: 14px;
            font-weight: 400;
            color: var(--text-muted);
        }
        .pricing-card .pricing-body {
            padding: 20px 24px 28px;
        }
        .pricing-card .pricing-body ul li {
            padding: 8px 0;
            font-size: 14px;
            color: var(--text-body);
            display: flex;
            align-items: center;
            gap: 10px;
            border-bottom: 1px solid var(--border-color);
        }
        .pricing-card .pricing-body ul li:last-child {
            border-bottom: none;
        }
        .pricing-card .pricing-body ul li i {
            color: var(--accent);
            font-size: 14px;
            width: 18px;
        }
        .pricing-card .pricing-footer {
            padding: 0 24px 28px;
            text-align: center;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 18px 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            padding: 4px 0;
            transition: color 0.2s;
            user-select: none;
        }
        .faq-question:hover {
            color: var(--primary-light);
        }
        .faq-question i {
            font-size: 18px;
            color: var(--accent);
            transition: transform 0.3s;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 0 0 0;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }
        .faq-answer.open {
            max-height: 600px;
            padding: 12px 0 4px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark);
            color: var(--white);
            text-align: center;
            padding: 72px 0 80px;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn {
            font-size: 16px;
            padding: 16px 40px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
            font-size: 14px;
            line-height: 1.7;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 48px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .sidebar-logo {
            padding: 0;
            margin: 0 0 16px;
            border: none;
            font-size: 20px;
        }
        .footer-brand p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
            line-height: 1.8;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            transition: color 0.2s;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.55);
            font-size: 13px;
        }
        .footer-contact li i {
            color: var(--accent);
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            text-align: center;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
            letter-spacing: 0.02em;
        }
        .footer-bottom .sep {
            color: var(--accent);
            margin: 0 8px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .advantage-grid {
                grid-template-columns: 1fr 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
            }
            .process-step::after {
                display: none;
            }
            .pricing-grid {
                grid-template-columns: 1fr 1fr;
            }
            .pricing-card.featured {
                transform: none;
            }
            .pricing-card.featured:hover {
                transform: translateY(-6px);
            }
            .hero-text h1 {
                font-size: 34px;
            }
        }

        @media (max-width: 768px) {
            body {
                flex-direction: column;
                padding-top: 60px;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
            }
            .sidebar.mobile-open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
            }
            .hero {
                padding: 60px 0 48px;
            }
            .hero .container {
                flex-direction: column;
                gap: 32px;
            }
            .hero-text {
                flex: 0 0 100%;
                max-width: 100%;
                text-align: center;
            }
            .hero-text .subtitle {
                margin: 0 auto 28px;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-image {
                flex: 0 0 100%;
                max-width: 100%;
            }
            .hero-text h1 {
                font-size: 28px;
            }
            .hero-decoration {
                display: none;
            }
            .grid-2,
            .grid-3,
            .grid-4,
            .advantage-grid,
            .scenario-list,
            .process-steps,
            .pricing-grid {
                grid-template-columns: 1fr;
            }
            .section {
                padding: var(--section-gap-mobile) 0;
            }
            .section-title {
                font-size: 24px;
            }
            .section-subtitle {
                font-size: 14px;
                margin-bottom: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .process-step::after {
                display: none;
            }
            .pricing-card.featured {
                transform: none;
            }
            .scenario-item .scenario-img {
                height: 160px;
            }
        }

        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 24px;
            }
            .hero {
                padding: 40px 0 32px;
            }
            .btn {
                padding: 12px 24px;
                font-size: 14px;
                min-width: 100px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .card {
                padding: 20px 16px;
            }
            .section-title {
                font-size: 22px;
            }
            .pricing-card .pricing-header .price {
                font-size: 26px;
            }
            .cta-section {
                padding: 48px 0 56px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .footer {
                padding: 40px 0 0;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Scrollbar ===== */
        .sidebar::-webkit-scrollbar {
            width: 4px;
        }
        .sidebar::-webkit-scrollbar-track {
            background: transparent;
        }
        .sidebar::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 4px;
        }