/* roulang page: index */
:root{
  --primary:#22d3ee;--primary-hover:#0ea5e9;--secondary:#a78bfa;--accent:#fbbf24;
  --dark:#0b1120;--dark-2:#111c2e;--dark-3:#1a2a3e;--text:#e2e8f0;--text-muted:#94a3b8;
  --card-bg:rgba(255,255,255,0.04);--card-border:rgba(255,255,255,0.08);
  --radius:16px;--radius-sm:10px;
  --shadow:0 4px 24px rgba(0,0,0,0.3);--shadow-lg:0 12px 40px rgba(0,0,0,0.45);
  --transition:all .3s cubic-bezier(.4,0,.2,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;background:var(--dark);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.site-header{position:sticky;top:0;z-index:100;background:rgba(11,17,32,.9);backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.06)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800;letter-spacing:.5px;color:#fff;white-space:nowrap}
.logo .logo-icon{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;flex-shrink:0}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-size:15px;font-weight:500;color:var(--text-muted);transition:var(--transition);position:relative;white-space:nowrap}
.nav-links a:hover{color:#fff}
.nav-links a.active{color:#fff}
.nav-links a.active::after{content:'';position:absolute;left:0;right:0;bottom:-4px;height:2px;background:linear-gradient(90deg,var(--primary),var(--secondary));border-radius:2px}
.nav-actions{display:flex;align-items:center;gap:12px}
.search-box{position:relative}
.search-box input{width:200px;height:40px;border-radius:10px;border:1px solid rgba(255,255,255,.1);background:rgba(255,255,255,.06);padding:0 36px 0 14px;font-size:14px;color:#fff;outline:none;transition:var(--transition)}
.search-box input::placeholder{color:rgba(255,255,255,.35)}
.search-box input:focus{border-color:var(--primary);background:rgba(34,211,238,.08)}
.search-box i{position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--text-muted);font-size:13px;pointer-events:none}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:12px;font-size:14px;font-weight:600;border:none;cursor:pointer;transition:var(--transition);white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;box-shadow:0 4px 16px rgba(34,211,238,.25)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(34,211,238,.35);color:#fff}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.15);color:var(--text)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.nav-toggle{display:none;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:10px;color:#fff;width:42px;height:42px;align-items:center;justify-content:center;font-size:18px;cursor:pointer;transition:var(--transition)}
.nav-toggle:hover{border-color:var(--primary);color:var(--primary)}
.mobile-menu{display:none;position:absolute;top:72px;left:0;right:0;background:rgba(11,17,32,.98);backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.08);padding:16px 24px 24px;z-index:99}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:12px 0;font-size:16px;font-weight:500;color:var(--text-muted);border-bottom:1px solid rgba(255,255,255,.04)}
.mobile-menu a:last-of-type{border-bottom:none}
.mobile-menu a:hover,.mobile-menu a.active{color:var(--primary)}
.mobile-menu .btn{width:100%;justify-content:center;margin-top:12px}
.hero{position:relative;padding:120px 0 100px;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,17,32,.94) 0%,rgba(11,17,32,.78) 50%,rgba(34,211,238,.12) 100%)}
.hero-content{position:relative;z-index:2;max-width:780px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:100px;background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.3);color:var(--primary);font-size:13px;font-weight:600;margin-bottom:24px}
.hero-badge i{font-size:12px}
.hero h1{font-size:54px;line-height:1.15;font-weight:800;color:#fff;margin-bottom:20px;letter-spacing:-1px}
.hero h1 span{background:linear-gradient(90deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-desc{font-size:18px;color:rgba(255,255,255,.75);margin-bottom:32px;max-width:620px}
.hero-ctas{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:48px}
.hero-stats{display:flex;gap:48px;flex-wrap:wrap}
.stat-item h3{font-size:32px;font-weight:800;color:#fff;line-height:1.2}
.stat-item p{font-size:14px;color:var(--text-muted)}
.section{padding:96px 0}
.section-head{text-align:center;margin-bottom:56px}
.section-head h2{font-size:36px;font-weight:800;color:#fff;letter-spacing:-.5px;margin-bottom:12px}
.section-head p{font-size:16px;color:var(--text-muted);max-width:600px;margin:0 auto}
.card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);padding:32px;transition:var(--transition)}
.card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.3);box-shadow:var(--shadow)}
.card-icon{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,rgba(34,211,238,.15),rgba(167,139,250,.15));display:flex;align-items:center;justify-content:center;font-size:22px;color:var(--primary);margin-bottom:20px}
.card h3{font-size:20px;font-weight:700;color:#fff;margin-bottom:12px}
.card p{font-size:15px;color:var(--text-muted)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.category-card{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--card-border);transition:var(--transition);display:block;min-height:280px}
.category-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(34,211,238,.35)}
.category-card img{width:100%;height:280px;object-fit:cover}
.category-card .overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,17,32,.2) 0%,rgba(11,17,32,.92) 100%);display:flex;flex-direction:column;justify-content:flex-end;padding:28px}
.category-card .tag{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:100px;background:rgba(34,211,238,.15);border:1px solid rgba(34,211,238,.3);color:var(--primary);font-size:12px;font-weight:600;margin-bottom:12px}
.category-card h3{font-size:22px;font-weight:700;color:#fff;margin-bottom:8px}
.category-card p{font-size:14px;color:rgba(255,255,255,.7);line-height:1.6}
.news-list{display:flex;flex-direction:column;gap:16px}
.news-item{display:flex;align-items:center;gap:20px;padding:20px 24px;background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-sm);transition:var(--transition)}
.news-item:hover{border-color:rgba(34,211,238,.3);background:rgba(34,211,238,.04);transform:translateX(4px)}
.news-item .news-date{flex-shrink:0;text-align:center;padding:8px 14px;background:rgba(34,211,238,.1);border-radius:10px;min-width:64px}
.news-item .news-date .d{font-size:20px;font-weight:800;color:var(--primary);line-height:1.2}
.news-item .news-date .m{font-size:12px;color:var(--text-muted)}
.news-item .news-content{flex:1;min-width:0}
.news-item .news-content h3{font-size:17px;font-weight:600;color:#fff;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.news-item .news-content p{font-size:14px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.news-item .news-cat{flex-shrink:0;padding:4px 12px;border-radius:100px;background:rgba(167,139,250,.15);color:var(--secondary);font-size:12px;font-weight:600}
.news-item .news-link{flex-shrink:0;color:var(--text-muted);transition:var(--transition)}
.news-item:hover .news-link{color:var(--primary);transform:translateX(4px)}
.empty-tip{text-align:center;padding:40px;color:var(--text-muted);font-size:15px;background:var(--card-bg);border:1px dashed var(--card-border);border-radius:var(--radius)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step{text-align:center;padding:32px 20px;background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);transition:var(--transition);position:relative}
.step:hover{border-color:rgba(34,211,238,.3);transform:translateY(-4px);box-shadow:var(--shadow)}
.step .step-num{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;font-weight:800;font-size:16px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.step h3{font-size:17px;font-weight:700;color:#fff;margin-bottom:8px}
.step p{font-size:14px;color:var(--text-muted)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-sm);margin-bottom:14px;overflow:hidden;transition:var(--transition)}
.faq-item:hover{border-color:rgba(34,211,238,.25)}
.faq-q{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;cursor:pointer;font-size:16px;font-weight:600;color:#fff;transition:var(--transition);gap:16px}
.faq-q i{color:var(--primary);font-size:14px;transition:var(--transition);flex-shrink:0}
.faq-item.active .faq-q i{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px;color:var(--text-muted);font-size:15px;line-height:1.8}
.faq-item.active .faq-a{max-height:500px;padding:0 24px 20px}
.cta-section{position:relative;padding:80px 0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background:linear-gradient(120deg,rgba(11,17,32,.95),rgba(34,211,238,.2))}
.cta-inner{position:relative;z-index:2;text-align:center;max-width:640px;margin:0 auto}
.cta-inner h2{font-size:36px;font-weight:800;color:#fff;margin-bottom:16px}
.cta-inner p{font-size:16px;color:rgba(255,255,255,.75);margin-bottom:32px}
.site-footer{background:#070d1a;border-top:1px solid rgba(255,255,255,.06);padding:64px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:15px;color:var(--text-muted);max-width:340px;line-height:1.8}
.footer-col h4{font-size:16px;font-weight:700;color:#fff;margin-bottom:20px}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:14px;color:var(--text-muted);transition:var(--transition)}
.footer-col ul a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.06);padding-top:24px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.4)}
.footer-links{display:flex;gap:24px}
.footer-links a{font-size:13px;color:rgba(255,255,255,.4);transition:var(--transition)}
.footer-links a:hover{color:var(--primary)}
.backpic-divider{position:relative;height:360px;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;overflow:hidden}
.backpic-divider::before{content:'';position:absolute;inset:0;background:linear-gradient(180deg,var(--dark) 0%,rgba(11,17,32,.4) 50%,var(--dark) 100%)}
@media(max-width:1024px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .search-box input{width:160px}
  .nav-links{gap:20px}
}
@media(max-width:768px){
  .nav-links,.nav-actions .search-box,.nav-actions .btn-ghost{display:none}
  .nav-toggle{display:inline-flex}
  .hero{padding:100px 0 80px}
  .hero h1{font-size:40px}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .section{padding:64px 0}
  .section-head h2{font-size:30px}
  .news-item{flex-wrap:wrap;gap:12px}
  .news-item .news-content h3{white-space:normal}
  .news-item .news-content p{white-space:normal}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .cta-inner h2{font-size:28px}
  .hero-stats{gap:24px}
}
@media(max-width:520px){
  .container{padding:0 16px}
  .nav-wrap{height:64px}
  .mobile-menu{top:64px}
  .logo{font-size:16px}
  .logo .logo-icon{width:34px;height:34px;font-size:14px}
  .hero h1{font-size:32px}
  .hero-ctas .btn{width:100%;justify-content:center}
  .steps{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .stat-item h3{font-size:26px}
}

/* roulang page: category1 */
:root{
  --primary:#00d4ff;
  --primary-dim:#00a8d6;
  --secondary:#8b5cf6;
  --accent:#ffd166;
  --bg:#0b0f19;
  --bg-card:#111827;
  --bg-soft:#0f172a;
  --border:#1e2a3a;
  --text:#e2e8f0;
  --text-muted:#94a3b8;
  --radius:1rem;
  --radius-lg:1.5rem;
  --shadow:0 8px 32px rgba(0,0,0,0.35);
  --shadow-neon:0 0 20px rgba(0,212,255,0.15),0 0 60px rgba(0,212,255,0.05);
  --transition:all .3s cubic-bezier(.4,0,.2,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:var(--transition)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer}
input{font-family:inherit}
.container{max-width:1280px;margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}
::selection{background:rgba(0,212,255,.3)}

/* header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(11,15,25,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(30,42,58,.6);transition:var(--transition)}
.site-header.scrolled{box-shadow:0 4px 30px rgba(0,0,0,.4)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:#fff;letter-spacing:.5px;white-space:nowrap}
.logo-icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;font-size:18px;box-shadow:0 0 16px rgba(0,212,255,.35)}
.nav-links{display:flex;align-items:center;gap:4px;flex:1;justify-content:center;overflow-x:auto}
.nav-links a{display:inline-block;padding:10px 16px;border-radius:8px;font-size:15px;font-weight:500;color:var(--text-muted);white-space:nowrap}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav-links a.active{color:var(--primary);background:rgba(0,212,255,.1);position:relative}
.nav-links a.active::after{content:'';position:absolute;left:16px;right:16px;bottom:4px;height:2px;border-radius:2px;background:var(--primary)}
.header-actions{display:flex;align-items:center;gap:12px}
.search-box{display:flex;align-items:center;background:rgba(255,255,255,.06);border:1px solid var(--border);border-radius:50px;padding:4px 6px 4px 14px;transition:var(--transition)}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,212,255,.15)}
.search-box input{background:transparent;border:none;outline:none;color:#fff;font-size:14px;width:150px}
.search-box input::placeholder{color:var(--text-muted)}
.search-box button{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:rgba(0,212,255,.15);color:var(--primary);border:none;transition:var(--transition)}
.search-box button:hover{background:var(--primary);color:#0b0f19}
.mobile-toggle{display:none;background:none;border:none;color:#fff;font-size:22px;padding:6px;border-radius:8px}
@media(max-width:1024px){
  .nav-links{order:3;width:100%;justify-content:flex-start;background:rgba(15,23,42,.98);position:absolute;top:72px;left:0;right:0;flex-direction:column;padding:12px;gap:4px;display:none;border-bottom:1px solid var(--border)}
  .nav-links.open{display:flex}
  .nav-links a{width:100%;text-align:left;padding:12px 16px}
  .header-actions{display:none}
  .mobile-toggle{display:block}
}
@media(max-width:520px){
  .logo{font-size:17px}
  .logo-icon{width:32px;height:32px;font-size:15px}
}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:12px;font-size:15px;font-weight:600;border:none;transition:var(--transition);cursor:pointer;white-space:nowrap}
.btn-sm{padding:8px 16px;font-size:14px;border-radius:10px}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;box-shadow:0 4px 20px rgba(0,212,255,.25)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(0,212,255,.4)}
.btn-primary:active{transform:scale(.97)}
.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-outline-accent{background:rgba(255,209,102,.12);border:1px solid rgba(255,209,102,.4);color:var(--accent)}
.btn-outline-accent:hover{background:rgba(255,209,102,.2);transform:translateY(-2px)}
.btn-full{width:100%}

/* hero */
.hero{position:relative;padding:100px 0 90px;background:linear-gradient(135deg,rgba(11,15,25,.92),rgba(15,23,42,.88)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;overflow:hidden}
.hero::before{content:'';position:absolute;top:-80px;right:-80px;width:320px;height:320px;background:radial-gradient(circle,rgba(0,212,255,.2),transparent 70%);border-radius:50%}
.hero::after{content:'';position:absolute;bottom:-120px;left:-60px;width:360px;height:360px;background:radial-gradient(circle,rgba(139,92,246,.15),transparent 70%);border-radius:50%}
.hero .container{position:relative;z-index:2}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,209,102,.12);border:1px solid rgba(255,209,102,.35);color:var(--accent);padding:6px 14px;border-radius:50px;font-size:13px;font-weight:600;margin-bottom:20px;letter-spacing:1px}
.hero-title{font-size:44px;line-height:1.3;font-weight:800;color:#fff;margin-bottom:16px}
.hero-title .gradient-text{background:linear-gradient(90deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-desc{font-size:18px;color:var(--text-muted);max-width:600px;margin-bottom:28px;line-height:1.8}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:48px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat-item{background:rgba(17,24,39,.6);border:1px solid var(--border);border-radius:14px;padding:18px 20px;text-align:center;backdrop-filter:blur(8px)}
.stat-number{font-size:28px;font-weight:800;color:var(--primary);line-height:1.4}
.stat-label{font-size:13px;color:var(--text-muted)}
@media(max-width:768px){
  .hero{padding:70px 0 60px}
  .hero-title{font-size:32px}
  .hero-desc{font-size:16px}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:520px){
  .hero-title{font-size:26px}
  .hero-actions .btn{width:100%}
  .stat-number{font-size:22px}
}

/* section titles */
.section{padding:80px 0}
.section-soft{background:var(--bg-soft)}
.section-head{text-align:center;max-width:720px;margin:0 auto 50px}
.section-tag{display:inline-block;background:rgba(0,212,255,.1);color:var(--primary);border:1px solid rgba(0,212,255,.2);padding:5px 14px;border-radius:50px;font-size:13px;font-weight:600;letter-spacing:2px;margin-bottom:14px}
.section-title{font-size:34px;font-weight:800;color:#fff;line-height:1.4;margin-bottom:12px}
.section-desc{font-size:16px;color:var(--text-muted);line-height:1.7}
@media(max-width:768px){.section{padding:60px 0}.section-title{font-size:26px}}

/* overview */
.overview-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.overview-text .lead{font-size:17px;color:var(--text);line-height:1.9;margin-bottom:14px}
.overview-text p{color:var(--text-muted);line-height:1.8;margin-bottom:14px}
.overview-list{margin-top:20px;display:grid;gap:14px}
.overview-list li{display:flex;align-items:flex-start;gap:12px;color:var(--text);font-size:15px}
.overview-list li i{color:var(--primary);margin-top:4px;font-size:14px}
.overview-visual{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.visual-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:var(--transition)}
.visual-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-neon)}
.visual-card .icon{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:14px}
.visual-card h4{font-size:16px;font-weight:600;color:#fff;margin-bottom:6px}
.visual-card p{font-size:13px;color:var(--text-muted);line-height:1.6}
@media(max-width:768px){.overview-grid{grid-template-columns:1fr;gap:32px}.overview-visual{grid-template-columns:1fr 1fr}}

/* entry cards */
.entry-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.entry-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:var(--transition);position:relative}
.entry-card:hover{transform:translateY(-6px);border-color:rgba(0,212,255,.4);box-shadow:var(--shadow-neon)}
.entry-card-img{position:relative;height:180px;overflow:hidden}
.entry-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.entry-card:hover .entry-card-img img{transform:scale(1.05)}
.entry-card-img::after{content:'';position:absolute;inset:0;background:linear-gradient(to top,rgba(17,24,39,.9),transparent 60%)}
.entry-card-img .badge{position:absolute;top:14px;left:14px;z-index:2}
.entry-card-body{padding:22px}
.entry-card-body h3{font-size:19px;font-weight:700;color:#fff;margin-bottom:10px}
.entry-card-body p{font-size:14px;color:var(--text-muted);line-height:1.7;margin-bottom:16px}
.entry-card-links{display:flex;align-items:center;justify-content:space-between;padding-top:14px;border-top:1px solid rgba(30,42,58,.5)}
.entry-card-links a{font-size:14px;font-weight:500}
.entry-card-links .primary-link{color:var(--primary)}
.entry-card-links .primary-link:hover{letter-spacing:.5px}
@media(max-width:768px){.entry-cards{grid-template-columns:1fr;gap:20px}}

/* badge */
.badge{display:inline-block;padding:4px 12px;border-radius:50px;font-size:12px;font-weight:700;letter-spacing:.5px}
.badge-primary{background:rgba(0,212,255,.15);color:var(--primary);border:1px solid rgba(0,212,255,.3)}
.badge-warning{background:rgba(255,209,102,.15);color:var(--accent);border:1px solid rgba(255,209,102,.3)}
.badge-danger{background:rgba(239,68,68,.15);color:#f87171;border:1px solid rgba(239,68,68,.3)}

/* steps */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.steps-grid::before{content:'';position:absolute;top:48px;left:10%;right:10%;height:2px;background:linear-gradient(90deg,var(--primary),var(--secondary));opacity:.3}
.step-item{text-align:center;position:relative}
.step-circle{width:96px;height:96px;margin:0 auto 18px;border-radius:50%;background:var(--bg-card);border:2px solid var(--primary);display:flex;align-items:center;justify-content:center;font-size:32px;font-weight:800;color:var(--primary);position:relative;z-index:2;box-shadow:0 0 20px rgba(0,212,255,.15)}
.step-item h4{font-size:16px;font-weight:600;color:#fff;margin-bottom:8px}
.step-item p{font-size:13px;color:var(--text-muted);line-height:1.6}
@media(max-width:768px){
  .steps-grid{grid-template-columns:1fr 1fr;gap:32px 20px}
  .steps-grid::before{display:none}
}
@media(max-width:520px){.steps-grid{grid-template-columns:1fr;gap:28px}}

/* article list */
.article-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.article-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:var(--transition)}
.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.article-card .thumb{height:140px;overflow:hidden;position:relative}
.article-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.article-card:hover .thumb img{transform:scale(1.05)}
.article-card .thumb .badge{position:absolute;top:10px;left:10px;z-index:2}
.article-card-body{padding:20px}
.article-card-body .meta{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--text-muted);margin-bottom:10px}
.article-card-body h3{font-size:16px;font-weight:600;line-height:1.5;color:#fff;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.article-card-body p{font-size:13px;color:var(--text-muted);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.article-card-body .read-more{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--primary);font-weight:600;margin-top:10px}
.article-card-body .read-more:hover{letter-spacing:.5px}
@media(max-width:768px){.article-cards{grid-template-columns:1fr;gap:20px}}

/* faq */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:var(--transition)}
.faq-item:hover{border-color:rgba(0,212,255,.3)}
.faq-item.active{border-color:var(--primary);box-shadow:0 0 20px rgba(0,212,255,.08)}
.faq-question{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 22px;cursor:pointer;font-size:16px;font-weight:600;color:#fff;background:transparent;border:none;width:100%;text-align:left}
.faq-question .faq-icon{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:rgba(0,212,255,.1);color:var(--primary);font-size:13px;flex-shrink:0;transition:var(--transition)}
.faq-item.active .faq-icon{transform:rotate(45deg);background:var(--primary);color:#0b0f19}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-answer-inner{padding:0 22px 20px;color:var(--text-muted);line-height:1.8;font-size:14px}

/* cta */
.cta-section{background:linear-gradient(135deg,rgba(0,212,255,.08),rgba(139,92,246,.1)),url('/assets/images/backpic/back-2.png') center/cover no-repeat;border-radius:24px;padding:60px;text-align:center;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background:rgba(11,15,25,.8)}
.cta-section .container{position:relative;z-index:2}
.cta-section h2{font-size:32px;font-weight:800;color:#fff;margin-bottom:12px}
.cta-section p{font-size:16px;color:var(--text-muted);max-width:560px;margin:0 auto 28px}
.cta-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
@media(max-width:768px){.cta-section{padding:40px 20px}.cta-section h2{font-size:24px}}

/* breadcrumb */
.breadcrumb{padding:20px 0;border-bottom:1px solid rgba(30,42,58,.5);background:rgba(15,23,42,.5)}
.breadcrumb .inner{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-muted)}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .separator{color:rgba(255,255,255,.2);font-size:12px}

/* footer */
.site-footer{background:#0a0e16;border-top:1px solid rgba(30,42,58,.6);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:40px}
.footer-brand p{font-size:14px;color:var(--text-muted);line-height:1.7;margin-top:16px;max-width:360px}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:1px}
.footer-col ul{display:grid;gap:10px}
.footer-col ul li a{font-size:14px;color:var(--text-muted);transition:var(--transition)}
.footer-col ul li a:hover{color:var(--primary);padding-left:4px}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 0;border-top:1px solid rgba(30,42,58,.6);font-size:13px;color:var(--text-muted);flex-wrap:wrap}
.footer-links{display:flex;gap:20px}
.footer-links a{font-size:13px;color:var(--text-muted)}
.footer-links a:hover{color:var(--primary)}
@media(max-width:768px){
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* accessibility */
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}

/* misc */
.divider{height:1px;background:linear-gradient(90deg,transparent,rgba(0,212,255,.3),transparent);border:none;margin:40px 0}

/* roulang page: article */
:root {
  --bg-primary: #0b0d1a;
  --bg-secondary: #111527;
  --bg-card: rgba(17, 21, 39, .88);
  --bg-card-hover: rgba(25, 30, 54, .95);
  --primary: #8b5cf6;
  --primary-dark: #7c3aed;
  --primary-glow: rgba(139, 92, 246, .32);
  --accent: #22d3ee;
  --accent-dark: #0ea5e9;
  --accent-glow: rgba(34, 211, 238, .22);
  --text-primary: #f4f5f9;
  --text-secondary: #a8aec1;
  --text-muted: #6b7280;
  --border-color: rgba(148, 163, 184, .13);
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-card: 0 20px 45px rgba(0, 0, 0, .35);
  --shadow-glow: 0 0 42px rgba(139, 92, 246, .16);
  --font-sans: 'Inter', 'Noto Sans SC', system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button, input { font-family: inherit; }
.container { width: 100%; max-width: 1220px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 13, 26, .92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-color);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  color: #fff;
  font-size: 1rem;
  box-shadow: 0 0 18px rgba(139, 92, 246, .4);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all .25s ease;
  border: 1px solid transparent;
}
.nav-links a:hover {
  color: #fff;
  background: rgba(139, 92, 246, .12);
  border-color: rgba(139, 92, 246, .3);
}
.nav-links a.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(139, 92, 246, .2), rgba(34, 211, 238, .14));
  border-color: rgba(139, 92, 246, .4);
  box-shadow: 0 0 20px rgba(139, 92, 246, .18);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 7px 14px;
  color: var(--text-muted);
  transition: border .2s;
}
.search-box:focus-within {
  border-color: rgba(139, 92, 246, .5);
  box-shadow: 0 0 14px rgba(139, 92, 246, .2);
}
.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  width: 132px;
  font-size: .875rem;
}
.search-box input::placeholder { color: var(--text-muted); }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 12px;
  padding: 10px 22px;
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  transition: all .3s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 6px 20px rgba(139, 92, 246, .28);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(139, 92, 246, .46);
}
.btn-outline {
  background: transparent;
  border-color: var(--border-color);
  color: var(--text-secondary);
}
.btn-outline:hover {
  border-color: rgba(34, 211, 238, .5);
  color: var(--accent);
}
.btn-dark {
  background: rgba(139, 92, 246, .14);
  color: #fff;
  border-color: rgba(139, 92, 246, .3);
}
.btn-dark:hover {
  background: rgba(139, 92, 246, .24);
  border-color: rgba(139, 92, 246, .55);
  transform: translateY(-2px);
}
.mobile-toggle {
  display: none;
  width: 42px; height: 42px;
  align-items: center; justify-content: center;
  background: rgba(255, 255, 255, .06);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  flex-shrink: 0;
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 72px 0 64px;
  background:
    linear-gradient(130deg, rgba(11, 13, 26, .94), rgba(20, 15, 40, .88)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom: 1px solid var(--border-color);
}
.article-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(600px 280px at 80% 20%, rgba(139, 92, 246, .2), transparent 70%);
}
.article-hero .container { position: relative; z-index: 2; }
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .875rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}
.breadcrumb a {
  color: var(--text-secondary);
  transition: color .2s;
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb i { font-size: .6rem; color: var(--text-muted); }
.breadcrumb span { color: var(--accent); }
.article-hero-title {
  font-size: clamp(1.9rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: #fff;
  max-width: 860px;
  text-shadow: 0 4px 30px rgba(139, 92, 246, .25);
  margin-bottom: 18px;
}
.article-hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 780px;
  line-height: 1.8;
  margin-bottom: 24px;
}
.article-hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(139, 92, 246, .14);
  border: 1px solid rgba(139, 92, 246, .28);
  color: #c4b5fd;
  border-radius: 999px;
  padding: 6px 16px;
  font-size: .85rem;
  font-weight: 500;
}
.badge-accent {
  background: rgba(34, 211, 238, .12);
  border-color: rgba(34, 211, 238, .25);
  color: #67e8f9;
}

/* ===== Article Main ===== */
.article-main {
  padding: 52px 0 64px;
  background: var(--bg-primary);
}
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 3vw, 44px);
  box-shadow: var(--shadow-card);
}
.article-content {
  font-size: 1.0625rem;
  line-height: 1.95;
  color: #d1d5db;
  word-break: break-word;
}
.article-content h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: #f9fafb;
  margin: 2.6rem 0 1.1rem;
  padding-left: 1rem;
  border-left: 4px solid var(--primary);
  line-height: 1.4;
}
.article-content h3 {
  font-size: 1.28rem;
  font-weight: 600;
  color: #f3f4f6;
  margin: 2.1rem 0 .85rem;
}
.article-content p {
  margin-bottom: 1.3rem;
}
.article-content ul,
.article-content ol {
  margin: 1.35rem 0;
  padding-left: 1.5rem;
}
.article-content ul li {
  list-style: disc;
  margin-bottom: .55rem;
  padding-left: .3rem;
}
.article-content ul li::marker { color: var(--primary); }
.article-content ol li {
  list-style: decimal;
  margin-bottom: .55rem;
  padding-left: .3rem;
}
.article-content ol li::marker { color: var(--accent); }
.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color .2s;
}
.article-content a:hover { color: #fff; }
.article-content blockquote {
  border-left: 3px solid var(--primary);
  background: rgba(139, 92, 246, .08);
  padding: 1rem 1.35rem;
  margin: 1.6rem 0;
  border-radius: 0 14px 14px 0;
  color: #e7dffe;
}
.article-content img {
  border-radius: var(--radius-md);
  margin: 1.6rem 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .25);
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6rem 0;
  font-size: .95rem;
}
.article-content th,
.article-content td {
  border: 1px solid var(--border-color);
  padding: .75rem 1rem;
  text-align: left;
}
.article-content th {
  background: rgba(139, 92, 246, .1);
  color: #f3f4f6;
  font-weight: 600;
  border-radius: 4px;
}
.article-content code {
  background: rgba(34, 211, 238, .1);
  color: var(--accent);
  padding: .2em .45em;
  border-radius: 6px;
  font-size: .9em;
}
.article-content pre {
  background: rgba(11, 13, 26, .8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}
.article-content pre code {
  background: transparent;
  color: #e2e8f0;
  padding: 0;
}
.article-tags {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: .8rem;
  color: var(--text-secondary);
  transition: all .25s;
  cursor: default;
}
.tag-chip i { color: var(--accent); font-size: .75rem; }

/* ===== Sidebar ===== */
.article-sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}
.sidebar-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}
.sidebar-title i {
  color: var(--primary);
  font-size: 1rem;
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(139, 92, 246, .14);
  border-radius: 8px;
}
.sidebar-list { list-style: none; display: flex; flex-direction: column; gap: 4px; }
.sidebar-list li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: .9rem;
  color: var(--text-secondary);
  transition: all .25s;
}
.sidebar-list li a:hover {
  background: rgba(139, 92, 246, .1);
  color: #fff;
  transform: translateX(4px);
}
.sidebar-list .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(34, 211, 238, .6);
}
.sidebar-list .title { flex: 1; line-height: 1.45; }
.sidebar-cat-list { display: flex; flex-direction: column; gap: 10px; }
.sidebar-cat-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-secondary);
  transition: all .3s;
}
.sidebar-cat-link:hover {
  border-color: rgba(139, 92, 246, .4);
  background: rgba(139, 92, 246, .08);
  color: #fff;
  transform: translateY(-2px);
}
.sidebar-cat-link i { color: var(--accent); width: 20px; text-align: center; }
.sidebar-cat-link .cat-name { flex: 1; font-size: .92rem; font-weight: 500; }
.sidebar-cat-link .cat-arrow { font-size: .8rem; color: var(--text-muted); }

/* ===== Not Found ===== */
.not-found {
  text-align: center;
  padding: 56px 24px;
}
.not-found i {
  font-size: 3.5rem;
  color: var(--primary);
  margin-bottom: 20px;
  opacity: .8;
}
.not-found h2 {
  font-size: 1.7rem;
  color: #fff;
  margin-bottom: 12px;
  font-weight: 700;
}
.not-found p {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 1rem;
}

/* ===== Related Section ===== */
.related-section {
  padding: 64px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}
.section-header {
  text-align: center;
  margin-bottom: 40px;
}
.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -.02em;
  margin-bottom: 10px;
}
.section-header p {
  color: var(--text-muted);
  font-size: .95rem;
}
.section-header h2 span {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.related-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all .3s ease;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
}
.related-card:hover {
  transform: translateY(-6px);
  border-color: rgba(139, 92, 246, .4);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}
.related-img { overflow: hidden; height: 160px; }
.related-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s;
}
.related-card:hover .related-img img { transform: scale(1.06); }
.related-body { padding: 18px 20px 22px; }
.related-body h3 {
  font-size: 1rem;
  font-weight: 600;
  color: #f3f4f6;
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 48px;
}
.related-body p {
  font-size: .875rem;
  color: var(--text-muted);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  font-size: .78rem;
  color: var(--text-muted);
}
.related-meta i { color: var(--accent); margin-right: 4px; }

/* ===== CTA Section ===== */
.cta-section {
  padding: 72px 0;
  background:
    linear-gradient(120deg, rgba(15, 13, 38, .95), rgba(8, 20, 30, .95)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.cta-inner {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: -.02em;
}
.cta-inner p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 30px;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}
.cta-note {
  margin-top: 18px;
  font-size: .85rem;
  color: var(--text-muted);
}
.cta-note i { color: var(--accent); margin-right: 4px; }

/* ===== Footer ===== */
.site-footer {
  background: #080a14;
  border-top: 1px solid var(--border-color);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p {
  color: var(--text-muted);
  font-size: .9rem;
  line-height: 1.8;
  max-width: 380px;
}
.footer-col h4 {
  font-size: .95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a {
  color: var(--text-muted);
  font-size: .88rem;
  transition: all .25s;
}
.footer-col ul a:hover {
  color: var(--accent);
  padding-left: 6px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding: 22px 0;
}
.footer-bottom p {
  font-size: .82rem;
  color: var(--text-muted);
}
.footer-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: .82rem;
}
.footer-links a {
  color: var(--text-muted);
  transition: color .2s;
}
.footer-links a:hover { color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .header-inner { gap: 16px; }
  .search-box { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .header-inner { height: 68px; }
  .logo { font-size: .92rem; }
  .logo-icon { width: 32px; height: 32px; }
  .mobile-toggle { display: flex; }
  .header-actions .btn-primary { display: none; }
  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: rgba(11, 13, 26, .98);
    backdrop-filter: blur(20px);
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-18px);
    opacity: 0;
    pointer-events: none;
    transition: all .3s ease;
    z-index: 99;
  }
  .nav-links.show {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links a {
    padding: 12px 16px;
    font-size: 1rem;
    border-radius: 12px;
    text-align: center;
  }
  .article-hero { padding: 48px 0 48px; }
  .article-main { padding: 36px 0 48px; }
  .related-section { padding: 48px 0; }
  .cta-section { padding: 56px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .logo-text { max-width: 150px; overflow: hidden; text-overflow: ellipsis; }
  .article-card { padding: 20px; }
  .article-hero-title { font-size: 1.6rem; }
  .article-hero-desc { font-size: .95rem; }
  .cta-actions { flex-direction: column; align-items: center; }
  .cta-actions .btn { width: 100%; justify-content: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; }
}

/* roulang page: category2 */
:root {
    --primary: #06b6d4;
    --secondary: #8b5cf6;
    --accent: #f59e0b;
    --bg: #0b1222;
    --card-bg: #111c33;
    --deep: #0f172a;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --border: rgba(148,163,184,0.15);
    --radius: 1rem;
    --shadow: 0 8px 32px rgba(0,0,0,0.35);
  }

  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  img {
    max-width: 100%;
    display: block;
  }

  button, input, select {
    font-family: inherit;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
  }

  /* ===== Navigation ===== */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(11,18,34,0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 16px;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #fff;
    white-space: nowrap;
  }

  .logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(6,182,212,0.4);
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
  }

  .nav-links a {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--muted);
    transition: all 0.25s ease;
  }

  .nav-links a:hover {
    color: #fff;
    background: rgba(148,163,184,0.1);
  }

  .nav-links a.active {
    color: #fff;
    background: linear-gradient(135deg, rgba(6,182,212,0.2), rgba(139,92,246,0.2));
    box-shadow: inset 0 0 0 1px rgba(6,182,212,0.3);
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .search-box {
    display: flex;
    align-items: center;
    background: rgba(148,163,184,0.1);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 6px 12px;
    gap: 8px;
    transition: border-color 0.25s;
  }

  .search-box:focus-within {
    border-color: var(--primary);
  }

  .search-box i {
    color: var(--muted);
    font-size: 0.85rem;
  }

  .search-box input {
    background: transparent;
    border: none;
    outline: none;
    color: #fff;
    font-size: 0.85rem;
    width: 130px;
  }

  .search-box input::placeholder {
    color: var(--muted);
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--primary), #0891b2);
    color: #fff;
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 4px 15px rgba(6,182,212,0.35);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(6,182,212,0.45);
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(148,163,184,0.1);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 9px 18px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.25s ease;
  }

  .btn-secondary:hover {
    border-color: var(--primary);
    color: #fff;
    background: rgba(6,182,212,0.1);
  }

  .mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.4rem;
    cursor: pointer;
  }

  /* ===== Hero Banner ===== */
  .hero {
    position: relative;
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--deep) 0%, #0e1e3c 50%, #132a4a 100%);
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    opacity: 0.25;
  }

  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(6,182,212,0.15);
    border: 1px solid rgba(6,182,212,0.4);
    color: #67e8f9;
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-bottom: 20px;
  }

  .hero h1 {
    font-size: 2.8rem;
    font-weight: 900;
    line-height: 1.2;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
  }

  .hero h1 span {
    background: linear-gradient(135deg, #67e8f9, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .hero p {
    font-size: 1.15rem;
    color: #b0bcd0;
    margin-bottom: 30px;
    line-height: 1.7;
  }

  .hero-buttons {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
  }

  .hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px solid var(--border);
  }

  .hero-stats .stat-item {
    flex: 1;
  }

  .hero-stats .stat-value {
    font-size: 1.8rem;
    font-weight: 900;
    color: #67e8f9;
    line-height: 1.2;
  }

  .hero-stats .stat-label {
    font-size: 0.85rem;
    color: var(--muted);
    margin-top: 4px;
  }

  /* ===== Section ===== */
  .section {
    padding: 80px 0;
  }

  .section-alt {
    background: linear-gradient(180deg, var(--bg) 0%, #0d1526 100%);
  }

  .section-head {
    max-width: 700px;
    margin-bottom: 48px;
  }

  .section-head.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
  }

  .section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 12px;
  }

  .section-head h2 {
    font-size: 2.1rem;
    font-weight: 900;
    color: #fff;
    line-height: 1.25;
    margin-bottom: 14px;
    letter-spacing: -0.02em;
  }

  .section-head p {
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.7;
  }

  /* ===== Cards ===== */
  .card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: all 0.3s ease;
  }

  .card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: rgba(6,182,212,0.3);
  }

  .card-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 18px;
    background: linear-gradient(135deg, rgba(6,182,212,0.2), rgba(139,92,246,0.2));
    color: #67e8f9;
  }

  .card h3 {
    font-size: 1.15rem;
    color: #fff;
    font-weight: 800;
    margin-bottom: 10px;
  }

  .card p {
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.6;
  }

  .card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-size: 0.88rem;
    font-weight: 600;
    margin-top: 16px;
    transition: gap 0.2s;
  }

  .card-link:hover {
    gap: 10px;
  }

  /* ===== Grid ===== */
  .grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  /* ===== Article Cards ===== */
  .article-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.3s ease;
  }

  .article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: rgba(6,182,212,0.3);
  }

  .article-cover {
    height: 180px;
    overflow: hidden;
    position: relative;
  }

  .article-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
  }

  .article-card:hover .article-cover img {
    transform: scale(1.05);
  }

  .article-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(6,182,212,0.9);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 800;
    padding: 4px 10px;
    border-radius: 6px;
    letter-spacing: 0.03em;
  }

  .article-body {
    padding: 20px 22px 24px;
  }

  .article-body h3 {
    font-size: 1.05rem;
    color: #fff;
    font-weight: 800;
    line-height: 1.4;
    margin-bottom: 8px;
  }

  .article-body h3 a:hover {
    color: var(--primary);
  }

  .article-body p {
    font-size: 0.88rem;
    color: var(--muted);
    line-height: 1.6;
    margin-bottom: 14px;
  }

  .article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.78rem;
    color: #718096;
    border-top: 1px solid rgba(148,163,184,0.1);
    padding-top: 14px;
  }

  .article-meta i {
    margin-right: 4px;
    font-size: 0.75rem;
  }

  /* ===== Timeline Process ===== */
  .process-wrap {
    position: relative;
    padding: 20px 0;
  }

  .process-wrap::before {
    content: '';
    position: absolute;
    left: 32px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    opacity: 0.4;
  }

  .process-step {
    display: flex;
    gap: 24px;
    margin-bottom: 36px;
    position: relative;
  }

  .process-step:last-child {
    margin-bottom: 0;
  }

  .step-number {
    width: 64px;
    height: 64px;
    min-width: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 900;
    color: #fff;
    box-shadow: 0 4px 20px rgba(6,182,212,0.4);
    z-index: 2;
  }

  .step-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    flex: 1;
    transition: all 0.3s ease;
  }

  .step-content:hover {
    border-color: rgba(6,182,212,0.3);
  }

  .step-content h3 {
    color: #fff;
    font-size: 1.05rem;
    font-weight: 800;
    margin-bottom: 6px;
  }

  .step-content p {
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.6;
  }

  /* ===== FAQ ===== */
  .faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px 26px;
    margin-bottom: 16px;
    transition: border-color 0.3s;
  }

  .faq-item:hover {
    border-color: rgba(6,182,212,0.3);
  }

  .faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
  }

  .faq-question i {
    color: var(--primary);
    transition: transform 0.3s;
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.7;
  }

  .faq-item.active .faq-answer {
    max-height: 300px;
    padding-top: 14px;
  }

  .faq-item.active .faq-question i {
    transform: rotate(180deg);
  }

  /* ===== CTA ===== */
  .cta-box {
    position: relative;
    background: linear-gradient(135deg, #0e1e3c, #1a1440);
    border: 1px solid rgba(6,182,212,0.3);
    border-radius: 20px;
    padding: 56px;
    overflow: hidden;
    text-align: center;
  }

  .cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 140%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(6,182,212,0.15), transparent 60%);
  }

  .cta-box h2 {
    font-size: 1.8rem;
    font-weight: 900;
    color: #fff;
    margin-bottom: 12px;
    position: relative;
  }

  .cta-box p {
    color: #b0bcd0;
    font-size: 1rem;
    max-width: 560px;
    margin: 0 auto 30px;
    position: relative;
  }

  .cta-box .btn-primary {
    position: relative;
  }

  /* ===== Footer ===== */
  .site-footer {
    background: var(--deep);
    border-top: 1px solid var(--border);
    padding: 70px 0 30px;
    margin-top: 40px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 40px;
  }

  .footer-brand p {
    color: var(--muted);
    font-size: 0.9rem;
    margin-top: 14px;
    line-height: 1.7;
    max-width: 360px;
  }

  .footer-col h4 {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 800;
    margin-bottom: 18px;
  }

  .footer-col ul {
    list-style: none;
  }

  .footer-col ul li {
    margin-bottom: 10px;
  }

  .footer-col ul a {
    color: var(--muted);
    font-size: 0.88rem;
    transition: color 0.2s;
  }

  .footer-col ul a:hover {
    color: var(--primary);
  }

  .footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
  }

  .footer-bottom p {
    color: #718096;
    font-size: 0.82rem;
  }

  .footer-links {
    display: flex;
    gap: 18px;
  }

  .footer-links a {
    color: #718096;
    font-size: 0.82rem;
    transition: color 0.2s;
  }

  .footer-links a:hover {
    color: var(--primary);
  }

  /* ===== Breadcrumb ===== */
  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--muted);
    margin-bottom: 20px;
    flex-wrap: wrap;
  }

  .breadcrumb a {
    color: var(--primary);
  }

  .breadcrumb a:hover {
    text-decoration: underline;
  }

  .breadcrumb i {
    font-size: 0.65rem;
    color: #718096;
  }

  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    .grid-4 {
      grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (max-width: 768px) {
    .header-inner {
      height: auto;
      padding: 12px 0;
      flex-wrap: wrap;
    }

    .mobile-toggle {
      display: block;
    }

    .nav-menu {
      display: none;
      width: 100%;
      order: 3;
      flex-direction: column;
      padding: 10px 0;
    }

    .nav-menu.open {
      display: flex;
    }

    .nav-links {
      flex-direction: column;
      align-items: flex-start;
      width: 100%;
    }

    .nav-links a {
      width: 100%;
      padding: 12px 16px;
    }

    .header-actions {
      margin-left: auto;
    }

    .search-box input {
      width: 90px;
    }

    .hero {
      padding: 110px 0 60px;
    }

    .hero h1 {
      font-size: 2rem;
    }

    .hero p {
      font-size: 1rem;
    }

    .hero-stats {
      flex-direction: column;
      gap: 20px;
    }

    .grid-4, .grid-3 {
      grid-template-columns: 1fr;
    }

    .grid-2 {
      grid-template-columns: 1fr;
    }

    .section {
      padding: 50px 0;
    }

    .section-head h2 {
      font-size: 1.5rem;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 30px;
    }

    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }

    .cta-box {
      padding: 36px 24px;
    }

    .cta-box h2 {
      font-size: 1.3rem;
    }
  }

  @media (max-width: 520px) {
    .header-actions .btn-secondary {
      display: none;
    }

    .search-box {
      display: none;
    }

    .hero h1 {
      font-size: 1.6rem;
    }

    .hero-stats .stat-value {
      font-size: 1.4rem;
    }

    .process-step {
      flex-direction: column;
      gap: 14px;
    }

    .process-wrap::before {
      left: 31px;
      top: 20px;
    }
  }