/* roulang page: index */
:root{
  --primary:#0b1f3a; --primary-2:#132f4e; --primary-3:#1b4568;
  --accent:#00d4aa; --accent-hover:#00b892; --accent-soft:rgba(0,212,170,.12);
  --heat:#ff6b35; --heat-soft:rgba(255,107,53,.1);
  --bg:#f4f7fb; --bg-white:#fff; --bg-dark:#0b1f3a; --bg-dark-2:#0e2742;
  --text:#182a38; --text-2:#4d5f72; --text-3:#7a8b9d;
  --border:#e3eaf0; --radius:14px; --radius-lg:22px; --radius-md:10px;
  --shadow:0 6px 30px rgba(11,31,58,.08); --shadow-lg:0 18px 50px rgba(11,31,58,.15);
  --max-w:1200px; --trans:.3s ease;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.75;font-size:15px}
a{color:inherit;text-decoration:none;transition:var(--trans)}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button,input{font-family:inherit;font-size:inherit}
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 28px;border-radius:50px;font-weight:600;font-size:15px;border:none;cursor:pointer;transition:var(--trans);line-height:1.4}
.btn-primary{background:var(--accent);color:#062830}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,212,170,.3)}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px)}
.btn-dark{background:var(--primary);color:#fff}
.btn-dark:hover{background:var(--primary-3);transform:translateY(-2px);box-shadow:0 8px 24px rgba(11,31,58,.24)}
.btn-sm{padding:8px 20px;font-size:14px}
.section{padding:72px 0}
.section-head{max-width:720px;margin:0 auto 48px;text-align:center}
.section-tag{display:inline-block;background:var(--accent-soft);color:#008f74;font-size:13px;font-weight:600;padding:5px 16px;border-radius:50px;letter-spacing:.5px;margin-bottom:14px}
.section-head h2{font-size:32px;line-height:1.3;font-weight:700;color:var(--primary)}
.section-head p{color:var(--text-2);margin-top:12px;font-size:16px}
.empty-tip{text-align:center;color:var(--text-3);padding:40px 0;background:var(--bg-white);border:1px dashed var(--border);border-radius:var(--radius)}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px;gap:16px}
.logo{font-size:20px;font-weight:800;color:var(--primary);letter-spacing:-.2px;display:flex;align-items:center;gap:10px;white-space:nowrap}
.logo-dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft);flex-shrink:0}
.main-nav{display:flex;align-items:center;gap:4px}
.nav-link{display:inline-flex;align-items:center;gap:4px;padding:8px 16px;border-radius:50px;font-weight:500;color:var(--text-2);font-size:15px;position:relative}
.nav-link:hover{color:var(--primary);background:var(--accent-soft)}
.nav-link.active{color:var(--primary);font-weight:600;background:var(--accent-soft)}
.nav-item{position:relative}
.mega-panel{position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%) translateY(10px);width:360px;background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:20px;opacity:0;visibility:hidden;transition:var(--trans);z-index:90}
.has-mega:hover .mega-panel{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.mega-col h4{font-size:13px;color:var(--text-3);font-weight:600;text-transform:uppercase;letter-spacing:.5px;margin-bottom:10px}
.mega-col a{display:block;padding:6px 0;color:var(--text);font-size:14px;font-weight:500}
.mega-col a:hover{color:var(--accent)}
.mega-card{background:var(--bg-dark);border-radius:var(--radius-md);overflow:hidden;padding:14px;display:flex;flex-direction:column;gap:8px}
.mega-card img{height:90px;object-fit:cover;border-radius:8px}
.mega-card p{color:#d4e2f0;font-size:12px;line-height:1.5}
.header-cta{flex-shrink:0}
.hamburger{display:none;background:none;border:none;cursor:pointer;width:40px;height:40px;border-radius:var(--radius-md);align-items:center;justify-content:center}
.hamburger span{display:block;width:20px;height:2px;background:var(--primary);margin:4px auto;border-radius:2px}
.hero{position:relative;background:var(--bg-dark);color:#fff;padding:120px 0 100px;overflow:hidden}
.hero:before{content:'';position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:.45}
.hero:after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,31,58,.72),rgba(11,31,58,.35) 50%,rgba(11,31,58,.78))}
.hero-content{position:relative;z-index:5;max-width:780px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(0,212,170,.15);border:1px solid rgba(0,212,170,.3);color:#8ef2dd;padding:6px 18px;border-radius:50px;font-size:14px;font-weight:600;margin-bottom:24px}
.hero-badge:before{content:'';width:8px;height:8px;border-radius:50%;background:var(--accent);display:inline-block;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(0,212,170,.5)}50%{box-shadow:0 0 0 6px rgba(0,212,170,0)}}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-.5px;margin-bottom:20px}
.hero p{font-size:17px;color:#c4d6e8;margin-bottom:32px;max-width:560px;line-height:1.8}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:48px}
.hero-stats{display:flex;gap:0;border-top:1px solid rgba(255,255,255,.14);padding-top:24px}
.stat-item{flex:1;text-align:center;font-size:14px;color:#b8ccdd;font-weight:500;position:relative}
.stat-item + .stat-item:before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:1px;height:28px;background:rgba(255,255,255,.16)}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature-card{background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px 22px;transition:var(--trans)}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:transparent}
.feature-icon{width:48px;height:48px;border-radius:14px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:16px}
.feature-card h3{font-size:17px;font-weight:700;color:var(--text);margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text-2);line-height:1.65}
.category-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.category-card{background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:var(--trans);display:block;position:relative}
.category-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.category-card img{width:100%;height:220px;object-fit:cover}
.category-card .card-body{padding:28px}
.category-card h3{font-size:22px;font-weight:700;margin-bottom:10px;color:var(--text)}
.category-card p{color:var(--text-2);line-height:1.7;margin-bottom:16px}
.card-link{color:var(--accent);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:4px}
.card-link:after{content:'→';transition:var(--trans)}
.category-card:hover .card-link:after{transform:translateX(4px)}
.news-section{background:var(--bg-white);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.news-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:26px;transition:var(--trans);display:block}
.news-card:hover{box-shadow:var(--shadow);transform:translateY(-3px);background:var(--bg-white)}
.news-card h3{font-size:17px;font-weight:700;color:var(--text);line-height:1.5;margin-bottom:10px}
.news-card p{font-size:14px;color:var(--text-2);line-height:1.7;margin-bottom:16px}
.news-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-3)}
.tag{background:var(--accent-soft);color:#008f74;padding:3px 12px;border-radius:30px;font-weight:600;font-size:12px}
.process-wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.process-step{position:relative;text-align:center;padding:32px 20px;background:var(--bg-white);border-radius:var(--radius-lg);border:1px solid var(--border)}
.step-num{width:44px;height:44px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;margin:0 auto 18px}
.process-step h3{font-size:18px;font-weight:700;margin-bottom:10px}
.process-step p{color:var(--text-2);font-size:14px;line-height:1.7}
.stats-band{position:relative;background:var(--bg-dark);padding:72px 0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center}
.stats-band:before{content:'';position:absolute;inset:0;background:rgba(11,31,58,.88)}
.stats-inner{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center;color:#fff}
.stat-block .num{font-size:42px;font-weight:800;color:var(--accent);line-height:1.2}
.stat-block .label{font-size:14px;color:#c4d6e8;margin-top:8px}
.stat-block .desc{font-size:12px;color:#7f95aa;margin-top:4px}
.faq-list{max-width:840px;margin:0 auto}
.faq-item{background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-md);margin-bottom:12px;overflow:hidden;transition:var(--trans)}
.faq-item:hover{border-color:rgba(0,212,170,.4)}
.faq-item summary{cursor:pointer;padding:20px 24px;font-weight:600;font-size:16px;color:var(--text);display:flex;align-items:center;justify-content:space-between;gap:12px;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:after{content:'+';font-size:22px;color:var(--accent);font-weight:400;transition:var(--trans);flex-shrink:0}
.faq-item[open] summary:after{transform:rotate(45deg)}
.faq-item .faq-answer{padding:0 24px 20px;color:var(--text-2);line-height:1.8;font-size:14px}
.cta-band{background:linear-gradient(135deg,var(--primary),var(--primary-3));color:#fff;padding:60px 0;position:relative;overflow:hidden}
.cta-band:before{content:'';position:absolute;width:260px;height:260px;border-radius:50%;background:rgba(0,212,170,.1);top:-80px;right:-60px}
.cta-inner{position:relative;z-index:2;text-align:center;max-width:640px}
.cta-inner h2{font-size:28px;font-weight:800;margin-bottom:14px}
.cta-inner p{color:#c4d6e8;margin-bottom:28px}
.site-footer{background:var(--bg-dark);color:#c4d6e8;padding:60px 0 0}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:48px;padding-bottom:40px}
.footer-brand .footer-logo{font-size:22px;font-weight:800;color:#fff;margin-bottom:14px;display:inline-block}
.footer-brand p{font-size:14px;line-height:1.8;color:#8ba0b5}
.footer-links h4{color:#fff;font-size:16px;font-weight:600;margin-bottom:16px}
.footer-links a{display:block;padding:6px 0;color:#8ba0b5;font-size:14px}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:13px;color:#6c8298}
@media (max-width:1024px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .stats-inner{grid-template-columns:repeat(2,1fr)}  
  .hero h1{font-size:40px}
}
@media (max-width:768px){
  .main-nav{display:none}
  .hamburger{display:flex}
  .header-cta{display:none}
  .hero{padding:90px 0 70px}
  .hero h1{font-size:32px}
  .hero p{font-size:15px}
  .category-grid,.news-grid{grid-template-columns:1fr}
  .process-wrap{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr;gap:28px}
  .section{padding:56px 0}
  .section-head h2{font-size:26px}
  .mega-panel{display:none}
}
@media (max-width:520px){
  .feature-grid{grid-template-columns:1fr}
  .stats-inner{grid-template-columns:1fr 1fr}
  .hero h1{font-size:28px}
  .hero-actions .btn{width:100%}
  .container{padding:0 16px}
}
@media (min-width:769px){
  .mega-panel{display:block}
}

/* roulang page: category1 */
:root{
  --primary:#2463eb;
  --primary-dark:#1847b8;
  --primary-light:#e8f0fe;
  --accent:#00d4ff;
  --accent-2:#7c3aed;
  --success:#10b981;
  --warning:#f59e0b;
  --danger:#ef4444;
  --dark:#0a1224;
  --dark-2:#101d36;
  --dark-3:#172843;
  --text:#16233b;
  --text-muted:#5c6b84;
  --text-light:#8a9bbc;
  --text-invert:#f5f8ff;
  --bg:#f4f7fc;
  --bg-white:#ffffff;
  --border:#dfe6f2;
  --radius:14px;
  --radius-lg:24px;
  --radius-sm:8px;
  --shadow-sm:0 2px 10px rgba(20,30,60,.06);
  --shadow-md:0 8px 28px rgba(20,30,60,.1);
  --shadow-lg:0 18px 50px rgba(20,30,60,.16);
  --transition:.25s ease;
  --font:'PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);font-size:16px;line-height:1.7;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit;transition:color var(--transition)}
img{max-width:100%;display:block}
button,input{font-family:var(--font);font-size:16px;border:none;outline:none}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.container-wide{max-width:1320px;margin:0 auto;padding:0 24px}
.section{padding:90px 0}
.section-alt{background:var(--bg-white)}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.section-eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--primary-light);color:var(--primary);font-size:13px;font-weight:600;padding:7px 18px;border-radius:50px;margin-bottom:16px;letter-spacing:.5px}
.section-head h2{font-size:36px;line-height:1.3;font-weight:700;color:var(--dark);letter-spacing:-.5px}
.section-head h2 span{color:var(--primary)}
.section-head p{color:var(--text-muted);font-size:16px;margin-top:14px}
.text-primary{color:var(--primary)}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:5px 13px;border-radius:50px;background:var(--primary-light);color:var(--primary)}
.badge-accent{background:rgba(0,212,255,.14);color:#0098c4}
.badge-success{background:rgba(16,185,129,.12);color:#059669}
.badge-warning{background:rgba(245,158,11,.13);color:#d97706}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);box-shadow:0 2px 12px rgba(20,30,60,.05)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.logo{font-size:22px;font-weight:800;color:var(--dark);letter-spacing:-.3px;display:flex;align-items:center;gap:10px;white-space:nowrap}
.logo i{color:var(--primary);font-size:24px}
.logo span{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.main-nav{display:flex;align-items:center;gap:34px;margin-left:auto}
.main-nav>.nav-link{font-size:15px;font-weight:600;color:var(--text);padding:8px 2px;position:relative;transition:color var(--transition)}
.main-nav>.nav-link:hover{color:var(--primary)}
.main-nav>.nav-link.active{color:var(--primary)}
.main-nav>.nav-link.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:3px;border-radius:4px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.nav-item{position:relative}
.nav-item>.nav-link{font-size:15px;font-weight:600;color:var(--text);padding:8px 2px;position:relative;transition:color var(--transition);display:flex;align-items:center;gap:6px}
.nav-item>.nav-link::after{content:"\f107";font-family:"Font Awesome 6 Free";font-weight:900;font-size:11px;color:var(--text-muted);transition:transform var(--transition)}
.nav-item>.nav-link:hover{color:var(--primary)}
.nav-item>.nav-link.active{color:var(--primary)}
.nav-item>.nav-link.active::before{content:"";position:absolute;left:0;right:0;bottom:-2px;height:3px;border-radius:4px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.nav-item:hover>.nav-link::after{transform:rotate(180deg)}
.mega-panel{position:absolute;top:calc(100% + 16px);left:50%;transform:translateX(-50%) translateY(10px);width:520px;background:#fff;border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow-lg);padding:26px;opacity:0;visibility:hidden;pointer-events:none;transition:all .3s ease}
.nav-item:hover .mega-panel{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}
.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.mega-col h4{font-size:13px;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;margin-bottom:14px;font-weight:700}
.mega-col a{display:block;font-size:14px;color:var(--text);padding:7px 0;font-weight:500;transition:color .2s}
.mega-col a:hover{color:var(--primary)}
.mega-card{border-radius:14px;overflow:hidden;background:var(--dark-2);position:relative;min-height:150px;display:flex;align-items:flex-end;padding:16px}
.mega-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.5}
.mega-card p{position:relative;color:#fff;font-size:13px;font-weight:600;line-height:1.5;z-index:1}
.nav-toggle{display:none;background:none;font-size:22px;color:var(--dark);cursor:pointer;padding:6px;border-radius:8px;transition:background .2s}
.nav-toggle:hover{background:var(--bg)}

/* ===== Hero ===== */
.cat-hero{position:relative;padding:120px 0 110px;background:linear-gradient(rgba(8,16,36,.88),rgba(8,16,36,.82)),url('/assets/images/backpic/back-2.png') center/cover no-repeat;color:#fff;overflow:hidden}
.cat-hero::after{content:"";position:absolute;top:-60%;right:-10%;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(0,212,255,.22),transparent 65%);pointer-events:none}
.cat-hero .container{position:relative;z-index:2}
.cat-hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center}
.cat-hero-info .hero-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(0,212,255,.14);border:1px solid rgba(0,212,255,.3);color:var(--accent);font-size:13px;font-weight:600;padding:7px 18px;border-radius:50px;margin-bottom:22px;letter-spacing:.3px}
.cat-hero-info h1{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-1px;margin-bottom:20px}
.cat-hero-info h1 span{color:var(--accent)}
.cat-hero-info p{font-size:17px;line-height:1.8;color:#aab8d4;max-width:540px;margin-bottom:32px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-size:15px;font-weight:600;padding:13px 28px;border-radius:12px;transition:all var(--transition);cursor:pointer;border:2px solid transparent}
.btn i{font-size:14px}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 8px 24px rgba(36,99,235,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(36,99,235,.45)}
.btn-outline{border-color:rgba(255,255,255,.35);color:#fff;background:rgba(255,255,255,.05)}
.btn-outline:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.6);transform:translateY(-2px)}
.hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.stat-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:24px 22px;transition:all .3s ease;backdrop-filter:blur(6px)}
.stat-card:hover{background:rgba(255,255,255,.12);transform:translateY(-4px)}
.stat-card .stat-value{font-size:32px;font-weight:800;color:#fff;line-height:1.2}
.stat-card .stat-value i{font-size:20px;color:var(--accent);margin-right:6px}
.stat-card .stat-label{font-size:13px;color:#9db0d0;margin-top:8px}

/* ===== Ready ===== */
.ready-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.ready-visual{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);position:relative}
.ready-visual img{width:100%;height:420px;object-fit:cover;transition:transform .5s ease}
.ready-visual:hover img{transform:scale(1.03)}
.ready-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 55%,rgba(6,14,34,.55));pointer-events:none}
.ready-visual .ready-float{position:absolute;z-index:2;bottom:22px;left:22px;right:22px;color:#fff;background:rgba(10,18,36,.55);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.15);border-radius:14px;padding:14px 18px;font-size:14px;line-height:1.5}
.check-list{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:28px}
.check-item{background:var(--bg-white);border:1px solid var(--border);border-radius:14px;padding:20px 18px;transition:all .3s ease;display:flex;gap:14px}
.check-item:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.check-item .check-icon{flex-shrink:0;width:44px;height:44px;border-radius:12px;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:17px}
.check-item h4{font-size:15px;font-weight:700;color:var(--dark);margin-bottom:4px}
.check-item p{font-size:13px;color:var(--text-muted);line-height:1.5}

/* ===== Steps ===== */
.steps-section{background:linear-gradient(180deg,var(--bg) 0%,#eef3fa 100%)}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;position:relative;margin-top:10px}
.steps-grid::before{content:"";position:absolute;top:48px;left:12%;right:12%;height:2px;background:linear-gradient(90deg,var(--border),var(--primary),var(--border));z-index:0;border-radius:2px}
.step-card{position:relative;z-index:1;text-align:center;background:var(--bg-white);border:1px solid var(--border);border-radius:20px;padding:34px 20px 30px;transition:all .3s ease}
.step-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px);border-color:transparent}
.step-num{width:56px;height:56px;margin:0 auto 18px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;box-shadow:0 8px 22px rgba(36,99,235,.3)}
.step-card h3{font-size:17px;font-weight:700;color:var(--dark);margin-bottom:10px}
.step-card p{font-size:14px;color:var(--text-muted);line-height:1.6}
.step-note{display:inline-flex;align-items:center;gap:6px;font-size:12px;background:var(--primary-light);color:var(--primary);padding:4px 12px;border-radius:50px;margin-top:12px;font-weight:600}

/* ===== Methods ===== */
.methods-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.method-card{display:flex;flex-direction:column;background:var(--bg-white);border:1px solid var(--border);border-radius:20px;overflow:hidden;transition:all .3s ease}
.method-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-5px)}
.method-card .method-img{height:240px;overflow:hidden;position:relative}
.method-card .method-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.method-card:hover .method-img img{transform:scale(1.05)}
.method-card .method-img .badge{position:absolute;top:16px;left:16px;z-index:1;backdrop-filter:blur(4px)}
.method-body{padding:28px;flex:1;display:flex;flex-direction:column}
.method-body h3{font-size:20px;font-weight:700;color:var(--dark);margin-bottom:12px}
.method-body p{font-size:14px;color:var(--text-muted);line-height:1.7;margin-bottom:18px}
.method-list li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text);margin-bottom:9px}
.method-list li i{color:var(--success);margin-top:4px;font-size:13px}
.method-btn{margin-top:auto;display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--primary);padding-top:16px;border-top:1px solid var(--border);transition:gap .2s}
.method-btn:hover{gap:14px;color:var(--primary-dark)}

/* ===== Security ===== */
.security-section{position:relative;background:var(--dark);color:#fff;overflow:hidden;padding:100px 0}
.security-section::before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:.18}
.security-section .container{position:relative;z-index:2}
.security-head{text-align:center;max-width:720px;margin:0 auto 52px}
.security-head .section-eyebrow{background:rgba(0,212,255,.15);color:var(--accent)}
.security-head h2{color:#fff;font-size:34px}
.security-head p{color:#9db0d0;margin-top:14px}
.security-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.security-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:28px 24px;text-align:center;transition:all .3s ease}
.security-card:hover{background:rgba(255,255,255,.12);transform:translateY(-5px)}
.security-card .sec-icon{width:62px;height:62px;margin:0 auto 18px;border-radius:16px;background:rgba(0,212,255,.15);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:24px;border:1px solid rgba(0,212,255,.25)}
.security-card h3{font-size:16px;font-weight:700;color:#fff;margin-bottom:10px}
.security-card p{font-size:13px;color:#9db0d0;line-height:1.6}
.sec-tip{margin-top:42px;text-align:center}
.sec-tip a{color:var(--accent);font-size:14px;font-weight:600;border-bottom:1px solid rgba(0,212,255,.4);padding-bottom:3px;transition:all .2s}
.sec-tip a:hover{color:#fff;border-color:#fff}

/* ===== Stats ===== */
.stats-strip{background:linear-gradient(135deg,var(--primary-dark),var(--dark-2))}
.stats-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:0;text-align:center}
.stats-item{padding:54px 30px;border-left:1px solid rgba(255,255,255,.08)}
.stats-item:first-child{border-left:none}
.stats-item .num{font-size:42px;font-weight:800;color:#fff;line-height:1}
.stats-item .num small{font-size:16px;color:var(--accent);margin-left:2px}
.stats-item .label{font-size:14px;color:#9db0d0;margin-top:10px}
.stats-item .icon{font-size:20px;color:var(--accent);margin-bottom:12px}

/* ===== FAQ ===== */
.faq-section{background:var(--bg-white)}
.faq-wrap{max-width:840px;margin:0 auto}
.faq-item{background:var(--bg-white);border:1px solid var(--border);border-radius:16px;margin-bottom:14px;overflow:hidden;transition:box-shadow .3s}
.faq-item:hover{box-shadow:var(--shadow-sm)}
.faq-item.active{box-shadow:var(--shadow-md)}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 24px;background:none;cursor:pointer;text-align:left;font-size:16px;font-weight:600;color:var(--dark)}
.faq-question .faq-icon{flex-shrink:0;width:30px;height:30px;border-radius:50%;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:13px;transition:transform .3s,background .3s}
.faq-item.active .faq-icon{transform:rotate(180deg);background:var(--primary);color:#fff}
.faq-answer{max-height:0;padding:0 24px;overflow:hidden;transition:max-height .4s ease,padding .4s ease;}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 22px}
.faq-answer p{font-size:14px;color:var(--text-muted);line-height:1.8;border-top:1px solid var(--border);padding-top:16px}

/* ===== CTA ===== */
.cta-section{padding:80px 0;background:linear-gradient(135deg,var(--primary),var(--primary-dark))}
.cta-box{display:flex;align-items:center;justify-content:space-between;gap:44px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:24px;padding:44px 50px;backdrop-filter:blur(8px)}
.cta-box h2{color:#fff;font-size:30px;font-weight:800;margin-bottom:10px}
.cta-box p{color:rgba(255,255,255,.8);font-size:15px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn-white{background:#fff;color:var(--primary-dark);box-shadow:0 8px 22px rgba(0,0,0,.14)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.2)}
.btn-ghost{border-color:rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.15);transform:translateY(-2px)}

/* ===== Footer ===== */
.site-footer{background:var(--dark);color:#9db0d0;padding-top:64px}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:60px;padding-bottom:48px}
.footer-brand p{font-size:14px;line-height:1.8;margin-top:16px;max-width:360px;color:#7f91b0}
.footer-logo{font-size:22px;font-weight:800;color:#fff;display:flex;align-items:center;gap:10px}
.footer-logo i{color:var(--accent);font-size:24px}
.footer-links h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.5px}
.footer-links a{display:block;font-size:14px;color:#8ba0c0;padding:5px 0;transition:all .2s}
.footer-links a:hover{color:var(--accent);padding-left:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:22px 0;text-align:center}
.footer-bottom p{font-size:13px;color:#6d83a5}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .section{padding:70px 0}
  .cat-hero{padding:90px 0}
  .cat-hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-stats{max-width:520px}
  .steps-grid{grid-template-columns:1fr 1fr;gap:20px}
  .steps-grid::before{display:none}
  .security-grid{grid-template-columns:1fr 1fr}
  .stats-inner{grid-template-columns:1fr 1fr}
  .stats-item{border-top:1px solid rgba(255,255,255,.08)}
  .stats-item:nth-child(3){border-left:none}
  .stats-item:nth-child(n+3){border-top:1px solid rgba(255,255,255,.08)}
  .ready-grid{grid-template-columns:1fr;gap:40px}
  .footer-top{grid-template-columns:1fr 1fr;gap:40px}
}
@media(max-width:768px){
  .section{padding:56px 0}
  .section-head h2{font-size:28px}
  .cat-hero{padding:70px 0}
  .cat-hero-info h1{font-size:34px}
  .nav-toggle{display:block}
  .main-nav{position:fixed;top:0;right:-100%;width:300px;height:100vh;background:#fff;flex-direction:column;align-items:flex-start;padding:90px 30px 30px;transition:right .35s ease;box-shadow:-10px 0 40px rgba(0,0,0,.15);z-index:1001;gap:8px;overflow-y:auto}
  .main-nav.open{right:0}
  .main-nav>.nav-link,.nav-item{width:100%}
  .nav-item>.nav-link{display:flex;justify-content:space-between}
  .nav-item>.nav-link::after{transform:rotate(0)}
  .mega-panel{position:static;transform:none;width:100%;box-shadow:none;border:none;border-left:2px solid var(--primary);border-radius:0;padding:12px 16px;opacity:1;visibility:visible;pointer-events:auto;max-height:0;padding-top:0;padding-bottom:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease;background:var(--bg)}
  .nav-item:hover .mega-panel{max-height:400px;padding-top:12px;padding-bottom:12px;transform:none}
  .mega-grid{grid-template-columns:1fr}
  .mega-card{display:none}
  .overlay{position:fixed;inset:0;background:rgba(10,18,36,.5);z-index:1000;opacity:0;visibility:hidden;transition:all .3s}
  .overlay.active{opacity:1;visibility:visible}
  .ready-visual img{height:300px}
  .check-list{grid-template-columns:1fr}
  .methods-grid{grid-template-columns:1fr}
  .security-grid{grid-template-columns:1fr}
  .cta-box{flex-direction:column;padding:34px 26px;text-align:center}
  .footer-top{grid-template-columns:1fr;gap:32px}
  .steps-grid{grid-template-columns:1fr}
}
@media(max-width:520px){
  .container,.container-wide{padding:0 18px}
  .cat-hero-info h1{font-size:28px}
  .hero-stats{grid-template-columns:1fr}
  .section-head h2{font-size:24px}
  .stats-item .num{font-size:32px}
  .faq-question{font-size:15px;padding:16px 18px}
  .faq-answer{padding:0 18px}
  .faq-item.active .faq-answer{padding:0 18px 18px}
  .cta-box h2{font-size:24px}
  .footer-top{grid-template-columns:1fr}
}

/* roulang page: article */
:root {
  --primary: #0057ff;
  --primary-dark: #003db5;
  --primary-light: #5c8fff;
  --accent: #00d4a0;
  --accent-dark: #00a67d;
  --bg: #f5f7fd;
  --bg-deep: #0a1022;
  --bg-card: #ffffff;
  --text: #161e2e;
  --text-weak: #667085;
  --border: #e5e7ef;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 32px rgba(15, 35, 80, 0.08);
  --shadow-hover: 0 16px 44px rgba(0, 87, 255, 0.14);
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease;
}

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

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-sm {
  max-width: 960px;
}

.container-lg {
  max-width: 1400px;
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 24px;
}

.logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.4px;
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  flex-shrink: 0;
}

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

.nav-link {
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: all 0.22s ease;
  white-space: nowrap;
}

.nav-link:hover {
  background: var(--bg);
  color: var(--primary);
}

.nav-link.active {
  background: rgba(0, 87, 255, 0.08);
  color: var(--primary);
  font-weight: 600;
}

.nav-item {
  position: relative;
}

.mega-panel {
  position: absolute;
  top: calc(100% + 14px);
  left: 0;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-width: 500px;
  padding: 28px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.28s ease;
  border: 1px solid var(--border);
}

.nav-item.has-mega:hover .mega-panel,
.nav-item.has-mega:focus-within .mega-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mega-grid {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 28px;
}

.mega-col h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-weak);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 14px;
}

.mega-col a {
  display: block;
  padding: 7px 0;
  font-size: 15px;
  color: var(--text);
  border-radius: 6px;
  transition: all .2s;
}

.mega-col a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.mega-card {
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg);
}

.mega-card img {
  width: 100%;
  height: 110px;
  object-fit: cover;
}

.mega-card p {
  padding: 12px 14px;
  font-size: 13px;
  color: var(--text-weak);
  line-height: 1.5;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: all .2s;
}

.menu-toggle:hover {
  border-color: var(--primary);
}

.menu-toggle .bar {
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.menu-toggle.active .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active .bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 88px 0 72px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: #fff;
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 16, 34, 0.92) 0%, rgba(10, 16, 34, 0.75) 45%, rgba(0, 87, 255, 0.4) 100%);
}

.article-hero .container {
  position: relative;
  z-index: 2;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
  transition: color .2s;
}

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

.breadcrumb .sep {
  opacity: 0.5;
}

.breadcrumb .current {
  color: var(--accent);
  font-weight: 500;
}

.article-hero h1 {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.6px;
  max-width: 820px;
  margin-bottom: 24px;
}

.hero-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}

.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 212, 160, 0.18);
  border: 1px solid rgba(0, 212, 160, 0.35);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 100px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}

.meta-item i {
  color: var(--accent);
}

/* ===== Article Main Layout ===== */
.article-main {
  padding: 64px 0 56px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 36px;
  align-items: start;
}

.article-content-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 44px;
  box-shadow: var(--shadow);
}

.article-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}

.article-body h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 42px 0 18px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
  line-height: 1.4;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 32px 0 14px;
}

.article-body h4 {
  font-size: 17px;
  font-weight: 600;
  margin: 24px 0 10px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body a {
  color: var(--primary);
  border-bottom: 1px solid rgba(0, 87, 255, 0.3);
  transition: border-color .2s;
}

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

.article-body img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin: 28px 0;
  box-shadow: var(--shadow);
}

.article-body ul,
.article-body ol {
  margin: 0 0 22px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 10px;
  line-height: 1.8;
}

.article-body blockquote {
  position: relative;
  border-left: 4px solid var(--accent);
  background: #f0fbf8;
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 28px 0;
  color: #2b3848;
  font-style: italic;
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 15px;
}

.article-body th,
.article-body td {
  border: 1px solid var(--border);
  padding: 12px 16px;
  text-align: left;
  line-height: 1.6;
}

.article-body th {
  background: var(--bg);
  font-weight: 600;
}

.article-body tr:nth-child(even) td {
  background: #fafbfe;
}

.article-body code {
  background: #f2f4fa;
  padding: 2px 8px;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 14px;
}

.article-body pre {
  background: var(--bg-deep);
  color: #e2e8f0;
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 28px 0;
  line-height: 1.6;
}

.article-body pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 36px 0;
}

.article-empty {
  text-align: center;
  padding: 80px 40px;
}

.article-empty i {
  font-size: 48px;
  color: var(--border);
  margin-bottom: 20px;
}

.article-empty h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.article-empty p {
  color: var(--text-weak);
  margin-bottom: 28px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  line-height: 1.4;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 20px rgba(0, 87, 255, 0.25);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 87, 255, 0.35);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(0, 212, 160, 0.25);
}

.btn-accent:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
}

.btn:focus-visible {
  outline: 3px solid rgba(0, 87, 255, 0.35);
  outline-offset: 2px;
}

/* ===== Sidebar ===== */
.sidebar-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.sidebar-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--bg);
  position: relative;
}

.sidebar-card h3::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.sidebar-info-list {
  list-style: none;
}

.sidebar-info-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 14px;
}

.sidebar-info-list li:last-child {
  border-bottom: none;
}

.sidebar-info-list .label {
  color: var(--text-weak);
}

.sidebar-info-list .value {
  font-weight: 600;
  color: var(--text);
}

.sidebar-cats {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-cat-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--bg);
  border: 1px solid transparent;
  transition: all .25s;
  font-weight: 500;
}

.sidebar-cat-item i {
  color: var(--primary);
  font-size: 14px;
}

.sidebar-cat-item:hover {
  background: rgba(0, 87, 255, 0.06);
  border-color: rgba(0, 87, 255, 0.15);
  color: var(--primary);
  transform: translateX(4px);
}

.sidebar-posts {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sidebar-post {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--border);
  transition: all .2s;
}

.sidebar-post:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sidebar-post-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(0, 87, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 13px;
  flex-shrink: 0;
}

.sidebar-post a {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sidebar-post a:hover {
  color: var(--primary);
}

.sidebar-post .post-date {
  font-size: 12px;
  color: var(--text-weak);
  margin-top: 4px;
}

/* ===== Related Section ===== */
.related-section {
  padding: 72px 0;
  background: #fff;
  border-top: 1px solid var(--border);
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 36px;
  gap: 24px;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.3;
}

.section-subtitle {
  font-size: 15px;
  color: var(--text-weak);
  margin-top: 8px;
  max-width: 420px;
}

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

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(15, 35, 80, 0.04);
}

.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0, 87, 255, 0.18);
}

.related-thumb {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.related-card:hover .related-thumb img {
  transform: scale(1.06);
}

.related-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(10, 16, 34, 0.35) 100%);
}

.related-thumb .badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  backdrop-filter: blur(6px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.badge-accent {
  background: var(--accent);
  color: #fff;
}

.related-info {
  padding: 20px 22px 24px;
}

.related-info h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-info h3 a {
  transition: color .2s;
}

.related-info h3 a:hover {
  color: var(--primary);
}

.related-info p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}

.related-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-weak);
}

.related-meta i {
  font-size: 12px;
  color: var(--primary);
}

.related-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 0;
  color: var(--text-weak);
  font-size: 15px;
}

/* ===== CTA Section ===== */
.cta-section {
  position: relative;
  padding: 84px 0;
  background: var(--bg-deep);
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(0, 87, 255, 0.3) 0%, transparent 45%),
    radial-gradient(circle at 80% 30%, rgba(0, 212, 160, 0.2) 0%, transparent 40%);
}

.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
  max-width: 680px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.6px;
  margin-bottom: 14px;
}

.cta-content p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 32px;
  line-height: 1.7;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 48px;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 40px;
}

.cta-stat-num {
  font-size: 30px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), #7dffdd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 4px;
}

/* ===== Footer ===== */
.site-footer {
  background: #0d1326;
  color: rgba(255, 255, 255, 0.8);
  padding: 64px 0 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .footer-logo {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  display: inline-block;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
}

.footer-links h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  padding: 5px 0;
  transition: all .2s;
}

.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
}

.footer-bottom p {
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateY(-120%);
    transition: transform 0.32s ease;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    gap: 6px;
    z-index: 99;
  }

  .main-nav.nav-open {
    transform: translateY(0);
  }

  .main-nav .nav-link {
    display: block;
    padding: 12px 14px;
    font-size: 16px;
    border-radius: 10px;
  }

  .main-nav .nav-link.active {
    background: rgba(0, 87, 255, 0.08);
  }

  .nav-item.has-mega {
    width: 100%;
  }

  .mega-panel {
    position: static;
    box-shadow: none;
    border: none;
    min-width: auto;
    padding: 0 0 0 14px;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    margin-top: 6px;
  }

  .mega-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .mega-card {
    display: none;
  }

  .mega-col h4 {
    margin-bottom: 6px;
  }

  .mega-col a {
    padding: 6px 0;
    font-size: 14px;
  }

  .article-hero h1 {
    font-size: 32px;
  }

  .article-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .cta-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .article-hero {
    padding: 64px 0 52px;
  }

  .article-hero h1 {
    font-size: 26px;
  }

  .article-content-card {
    padding: 28px 22px;
  }

  .article-body {
    font-size: 15px;
    line-height: 1.85;
  }

  .article-body h2 {
    font-size: 21px;
    margin: 32px 0 14px;
  }

  .section-title {
    font-size: 26px;
  }

  .cta-content h2 {
    font-size: 26px;
  }

  .cta-actions {
    flex-direction: column;
    align-items: center;
  }

  .cta-actions .btn {
    width: 100%;
    max-width: 260px;
  }

  .cta-stats {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .cta-stat:nth-child(3) {
    grid-column: 1 / -1;
  }
}

@media (max-width: 520px) {
  .logo {
    font-size: 17px;
  }

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

  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-brand {
    grid-column: auto;
  }

  .hero-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .article-content-card {
    padding: 22px 16px;
    border-radius: 12px;
  }

  .cta-stats {
    grid-template-columns: 1fr;
  }

  .cta-stat:nth-child(3) {
    grid-column: auto;
  }
}

/* roulang page: category2 */
:root {
  --primary: #e63a2e;
  --primary-dark: #c22a20;
  --primary-light: #ff6a5e;
  --accent: #f5b820;
  --dark: #0d1117;
  --dark-soft: #161c26;
  --dark-card: #1b232f;
  --light: #f6f8fb;
  --white: #ffffff;
  --text: #1e2a36;
  --text-weak: #5b6b7b;
  --border: #e4e9f0;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(13, 17, 23, 0.06);
  --shadow-md: 0 8px 24px rgba(13, 17, 23, 0.1);
  --shadow-lg: 0 20px 48px rgba(13, 17, 23, 0.14);
  --space: 8px;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--light);
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
ul, ol {
  list-style: none;
}
button, input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(230, 58, 46, 0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 100px;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--dark);
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.section-text {
  font-size: 16px;
  color: var(--text-weak);
  line-height: 1.8;
}

/* Header */
.site-header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(228, 233, 240, 0.8);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  box-shadow: 0 4px 12px rgba(230, 58, 46, 0.3);
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
  letter-spacing: -0.01em;
}
.logo-text span {
  color: var(--primary);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: flex-end;
  position: relative;
}
.main-nav .nav-link {
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
}
.main-nav .nav-link:hover {
  color: var(--primary);
  background: rgba(230, 58, 46, 0.06);
}
.main-nav .nav-link.active {
  color: var(--primary);
  background: rgba(230, 58, 46, 0.08);
  font-weight: 600;
}
.nav-item {
  position: relative;
}
.nav-item > .nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-item > .nav-link .caret {
  font-size: 11px;
  transition: var(--transition);
}
.nav-item:hover > .nav-link {
  color: var(--primary);
  background: rgba(230, 58, 46, 0.06);
}
.nav-item:hover > .nav-link .caret {
  transform: rotate(180deg);
}
.mega-panel {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  padding: 24px;
  width: 480px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 200;
}
.nav-item:hover .mega-panel {
  opacity: 1;
  visibility: visible;
  top: 100%;
}
.mega-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.mega-col h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-weak);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.mega-col a {
  display: block;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text);
  transition: var(--transition);
}
.mega-col a:hover {
  background: rgba(230, 58, 46, 0.05);
  color: var(--primary);
  padding-left: 14px;
}
.mega-card {
  background: var(--dark-soft);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  min-height: 160px;
  display: flex;
  align-items: flex-end;
}
.mega-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
}
.mega-card p {
  position: relative;
  z-index: 2;
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  padding: 16px;
  background: linear-gradient(to top, rgba(13, 17, 23, 0.9), transparent);
  width: 100%;
  line-height: 1.5;
}
.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff !important;
  padding: 10px 20px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 4px 14px rgba(230, 58, 46, 0.3);
  transition: var(--transition);
}
.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(230, 58, 46, 0.4);
}
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.mobile-toggle span {
  width: 24px;
  height: 2.5px;
  background: var(--dark);
  border-radius: 4px;
  transition: var(--transition);
}

/* Page Banner */
.page-banner {
  position: relative;
  background: var(--dark);
  padding: 96px 0 80px;
  overflow: hidden;
}
.page-banner-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.5;
}
.page-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(13, 17, 23, 0.9) 0%, rgba(13, 17, 23, 0.6) 50%, rgba(13, 17, 23, 0.35) 100%);
  z-index: 1;
}
.banner-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}
.banner-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(230, 58, 46, 0.2);
  border: 1px solid rgba(230, 58, 46, 0.4);
  color: var(--primary-light);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}
.page-banner h1 {
  font-size: clamp(32px, 5vw, 48px);
  color: #fff;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.page-banner p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  max-width: 640px;
}
.breadcrumb {
  margin-top: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}
.breadcrumb a {
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}
.breadcrumb a:hover {
  color: #fff;
}
.breadcrumb .sep {
  color: rgba(255, 255, 255, 0.4);
}
.breadcrumb .current {
  color: rgba(255, 255, 255, 0.9);
}

/* News Grid */
.news-section {
  padding: 80px 0;
  background: var(--light);
}
.news-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
}
.filter-btn {
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
}
.filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.news-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.news-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
  background: var(--dark-soft);
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.news-card:hover .news-thumb img {
  transform: scale(1.05);
}
.news-cat {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(13, 17, 23, 0.75);
  backdrop-filter: blur(6px);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 100px;
}
.news-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 10px;
}
.news-meta i {
  margin-right: 4px;
  color: var(--primary);
}
.news-body h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--dark);
  margin-bottom: 8px;
  transition: var(--transition);
}
.news-card:hover .news-body h3 {
  color: var(--primary);
}
.news-body p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  flex: 1;
}
.news-link {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.news-link i {
  transition: transform 0.3s ease;
}
.news-link:hover i {
  transform: translateX(4px);
}

/* Stats */
.stats-section {
  padding: 80px 0;
  background: var(--dark);
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  opacity: 0.3;
}
.stats-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.stat-item {
  text-align: center;
  padding: 32px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  backdrop-filter: blur(8px);
  transition: var(--transition);
}
.stat-item:hover {
  background: rgba(255, 255, 255, 0.09);
  transform: translateY(-4px);
}
.stat-num {
  font-size: 42px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 8px;
  font-family: "SF Mono", "JetBrains Mono", monospace;
}
.stat-num em {
  font-style: normal;
  color: var(--primary-light);
}
.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

/* Feature Cards */
.feature-section {
  padding: 80px 0;
  background: #fff;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  padding: 36px 28px;
  border-radius: var(--radius);
  background: var(--light);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: transparent;
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 20px;
  box-shadow: 0 6px 16px rgba(230, 58, 46, 0.25);
}
.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.7;
}

/* Topic List */
.topic-section {
  padding: 80px 0;
  background: var(--light);
}
.topic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}
.topic-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.topic-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}
.topic-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 17, 23, 0.5), transparent);
}
.topic-content h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 20px;
  line-height: 1.3;
}
.topic-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.topic-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: #fff;
  border-radius: 12px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.topic-item:hover {
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}
.topic-index {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(230, 58, 46, 0.1);
  color: var(--primary);
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.topic-item h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 4px;
}
.topic-item p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.6;
}

/* FAQ */
.faq-section {
  padding: 80px 0;
  background: #fff;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: var(--transition);
  background: var(--light);
}
.faq-item:hover {
  border-color: var(--primary);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
  cursor: pointer;
  transition: var(--transition);
}
.faq-q i {
  color: var(--primary);
  transition: transform 0.3s ease;
}
.faq-item.open .faq-q i {
  transform: rotate(45deg);
}
.faq-a {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.8;
}
.faq-item.open .faq-a {
  padding: 0 24px 20px;
  max-height: 200px;
}

/* CTA */
.cta-section {
  padding: 80px 0;
  background: var(--dark);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.35;
}
.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
  padding: 40px 0;
}
.cta-inner h2 {
  color: #fff;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 16px;
}
.cta-inner p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 17px;
  margin-bottom: 32px;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--accent), #f5a623);
  color: var(--dark) !important;
  font-size: 16px;
  font-weight: 700;
  padding: 16px 36px;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(245, 184, 32, 0.3);
  transition: var(--transition);
}
.cta-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(245, 184, 32, 0.4);
}

/* Footer */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-logo {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.footer-logo .logo-icon {
  background: var(--primary);
}
.footer-brand p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 360px;
}
.footer-links h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-links a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}
.footer-links a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}
.footer-bottom {
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.4);
}

/* Responsive */
@media (max-width: 1024px) {
  .header-inner {
    gap: 16px;
  }
  .main-nav {
    gap: 0;
  }
  .main-nav .nav-link {
    padding: 10px 12px;
    font-size: 14px;
  }
  .nav-btn {
    padding: 10px 16px;
    font-size: 13px;
  }
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .topic-grid {
    grid-template-columns: 1fr;
  }
  .topic-image img {
    height: 320px;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 768px) {
  .header-inner {
    height: auto;
    padding: 12px 0;
    flex-wrap: wrap;
  }
  .logo {
    flex: 1;
  }
  .mobile-toggle {
    display: flex;
  }
  .main-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    padding: 16px 0;
    gap: 8px;
    border-top: 1px solid var(--border);
  }
  .main-nav.open {
    display: flex;
  }
  .nav-item {
    width: 100%;
  }
  .nav-item > .nav-link {
    justify-content: space-between;
    width: 100%;
  }
  .mega-panel {
    position: static;
    width: 100%;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    border: none;
    padding: 12px 16px;
    background: var(--light);
    border-radius: 8px;
    display: none;
    margin-top: 8px;
  }
  .nav-item.mobile-open .mega-panel {
    display: block;
  }
  .mega-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .nav-cta {
    display: none;
  }
  .page-banner {
    padding: 64px 0 56px;
  }
  .news-section,
  .stats-section,
  .feature-section,
  .topic-section,
  .faq-section,
  .cta-section {
    padding: 56px 0;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .section-head {
    margin-bottom: 32px;
  }
  .topic-grid {
    gap: 24px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .logo-text {
    font-size: 17px;
  }
  .logo-icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
  .page-banner h1 {
    font-size: 28px;
  }
  .page-banner p {
    font-size: 15px;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .news-filter {
    gap: 8px;
  }
  .filter-btn {
    padding: 6px 14px;
    font-size: 13px;
  }
  .faq-q {
    padding: 16px;
    font-size: 15px;
  }
  .cta-btn {
    width: 100%;
    justify-content: center;
  }
}