/* roulang page: index */
:root{
  --primary:#FF6A00;
  --primary-dark:#E55D00;
  --secondary:#FFB648;
  --bg-dark:#0D0E12;
  --bg-panel:#14151A;
  --bg-card:#1A1B22;
  --bg-float:#20222B;
  --text-main:#F5F4F0;
  --text-secondary:#A8A8B0;
  --text-weak:#6E6E78;
  --border-white:rgba(255,255,255,0.08);
  --border-orange:rgba(255,106,0,0.5);
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-card:0 4px 20px rgba(0,0,0,0.25);
  --shadow-hover:0 12px 32px rgba(255,106,0,0.15);
  --font-stack:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",sans-serif;
  --container-max:1200px;
  --section-gap:96px;
  --m-section-gap:64px;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:var(--font-stack);background:var(--bg-dark);color:var(--text-main);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease;}
ul,ol{list-style:none;}
button,input,textarea{font-family:inherit;font-size:inherit;color:inherit;background:none;border:none;outline:none;}
.container{max-width:var(--container-max);margin:0 auto;padding:0 24px;}
.section{padding:var(--section-gap) 0;}
.section-head{text-align:center;max-width:760px;margin:0 auto 56px;}
.section-head .section-tag{display:inline-block;background:rgba(255,106,0,0.12);color:var(--secondary);font-size:13px;font-weight:600;padding:5px 16px;border-radius:999px;margin-bottom:16px;letter-spacing:.5px;}
.section-head h2{font-size:34px;font-weight:800;line-height:1.3;margin-bottom:12px;letter-spacing:-.5px;}
.section-head p{color:var(--text-secondary);font-size:16px;line-height:1.8;}
a:focus-visible,button:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px;}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto;}*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;}}

/* Header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(13,14,18,0.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border-white);transition:background .3s ease,box-shadow .3s ease;}
.site-header.scrolled{background:rgba(13,14,18,0.88);box-shadow:0 6px 24px rgba(0,0,0,0.35);}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px;}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:20px;letter-spacing:-.5px;color:var(--text-main);flex-shrink:0;}
.logo-mark{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:10px;padding:6px;transition:transform .25s ease;}
.logo:hover .logo-mark{transform:rotate(-8deg) scale(1.05);}
.logo-mark svg{width:100%;height:100%;}
.logo span.logo-text{white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:4px;}
.nav-link{display:block;padding:9px 18px;font-size:15px;font-weight:500;color:var(--text-secondary);border-radius:8px;position:relative;transition:color .2s ease,background .2s ease;}
.nav-link:hover{color:var(--text-main);background:rgba(255,255,255,0.04);}
.nav-link.active{color:var(--primary);font-weight:600;}
.nav-link.active::after{content:"";position:absolute;left:18px;right:18px;bottom:2px;height:2px;background:linear-gradient(90deg,var(--primary),var(--secondary));border-radius:2px;}
.header-cta{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#141414;font-weight:700;font-size:14px;padding:9px 22px;border-radius:var(--radius-btn);transition:transform .2s ease,box-shadow .2s ease;box-shadow:0 4px 16px rgba(255,106,0,0.25);white-space:nowrap;margin-left:8px;}
.header-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,106,0,0.35);}
.header-cta:active{transform:translateY(0);}
.nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border-radius:10px;color:var(--text-main);background:rgba(255,255,255,0.05);cursor:pointer;transition:background .2s;}
.nav-toggle:hover{background:rgba(255,255,255,0.1);}
.nav-toggle i{font-size:20px;}

/* Hero */
.hero{position:relative;min-height:80vh;display:flex;align-items:center;padding:140px 0 80px;background:linear-gradient(90deg,rgba(13,14,18,0.97) 15%,rgba(13,14,18,0.82) 50%,rgba(255,106,0,0.06) 100%),url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;overflow:hidden;}
.hero-overlay{position:absolute;inset:0;background:radial-gradient(ellipse at 75% 40%,rgba(255,106,0,0.12) 0%,transparent 60%);pointer-events:none;}
.hero::after{content:"";position:absolute;bottom:0;left:0;right:0;height:120px;background:linear-gradient(to bottom,transparent,var(--bg-dark));pointer-events:none;}
.hero-inner{position:relative;z-index:2;}
.hero .countdown-bar{display:inline-flex;align-items:center;gap:10px;background:rgba(255,106,0,0.12);border:1px solid rgba(255,106,0,0.25);border-radius:999px;padding:7px 18px;margin-bottom:28px;font-size:14px;color:var(--secondary);font-weight:600;}
.countdown-bar i{color:var(--primary);font-size:14px;}
.countdown-time{font-variant-numeric:tabular-nums;font-weight:800;letter-spacing:.5px;color:var(--text-main);}
.hero h1{font-size:52px;font-weight:900;line-height:1.2;margin-bottom:20px;max-width:680px;letter-spacing:-1px;}
.hero h1 .highlight{background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.hero-desc{font-size:17px;color:var(--text-secondary);line-height:1.8;max-width:600px;margin-bottom:34px;}
.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:14px;margin-bottom:44px;}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:15px;padding:14px 34px;border-radius:var(--radius-btn);transition:transform .2s ease,box-shadow .2s ease,border-color .2s,background .2s;cursor:pointer;min-height:48px;}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#141414;box-shadow:0 6px 22px rgba(255,106,0,0.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(255,106,0,0.4);}
.btn-primary:active{transform:translateY(0);}
.btn-secondary{background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.25);color:var(--text-main);}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);background:rgba(255,106,0,0.06);}
.btn-secondary:active{transform:translateY(0);}
.hero-stats{display:flex;flex-wrap:wrap;gap:40px;}
.stat-item .stat-num{font-size:38px;font-weight:900;color:var(--secondary);font-variant-numeric:tabular-nums;line-height:1.2;}
.stat-item .stat-label{font-size:13px;color:var(--text-weak);margin-top:2px;letter-spacing:.3px;}
.hero-image{display:none;}

/* Category Entry */
.category-entry{background:var(--bg-dark);}
.category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.category-card{background:var(--bg-card);border-radius:var(--radius-card);border:1px solid var(--border-white);overflow:hidden;transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;display:block;}
.category-card:hover{transform:translateY(-4px);border-color:var(--border-orange);box-shadow:var(--shadow-hover);}
.category-card-img{position:relative;height:160px;overflow:hidden;}
.category-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.category-card:hover .category-card-img img{transform:scale(1.05);}
.category-card-img::after{content:"";position:absolute;inset:0;background:linear-gradient(to bottom,transparent 30%,rgba(13,14,18,0.55));}
.category-badge{position:absolute;top:12px;left:12px;background:rgba(255,106,0,0.85);color:#fff;font-size:12px;font-weight:600;padding:4px 12px;border-radius:999px;z-index:2;letter-spacing:.3px;}
.category-card-body{padding:22px 22px 24px;}
.category-card-body h3{font-size:19px;font-weight:800;margin-bottom:6px;}
.category-card-body p{font-size:14px;color:var(--text-secondary);line-height:1.7;margin-bottom:14px;}
.category-card-link{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14px;font-weight:600;transition:gap .2s ease,color .2s;}
.category-card-link i{font-size:13px;transition:transform .2s ease;}
.category-card:hover .category-card-link{gap:10px;}
.category-card:hover .category-card-link i{transform:translateX(3px);}

/* Resource / Features */
.resource-list{background:var(--bg-panel);border-top:1px solid var(--border-white);border-bottom:1px solid var(--border-white);}
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;padding:26px 0;}
.feature-row + .feature-row{border-top:1px solid var(--border-white);}
.feature-row.reverse .feature-media{order:2;}
.feature-media{position:relative;border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);}
.feature-media img{width:100%;height:300px;object-fit:cover;transition:transform .4s ease;}
.feature-row:hover .feature-media img{transform:scale(1.03);}
.feature-media::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(255,106,0,0.08),transparent 60%);pointer-events:none;}
.feature-body h3{font-size:25px;font-weight:800;margin-bottom:10px;line-height:1.35;}
.feature-body .feature-icon{width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:10px;color:#141414;font-size:18px;margin-bottom:18px;box-shadow:0 4px 14px rgba(255,106,0,0.25);}
.feature-body p{color:var(--text-secondary);font-size:16px;line-height:1.8;}
.feature-list{display:flex;flex-direction:column;gap:12px;margin-top:18px;}
.feature-list li{display:flex;align-items:flex-start;gap:10px;color:var(--text-secondary);font-size:15px;}
.feature-list li i{color:var(--primary);font-size:15px;margin-top:5px;}
.feature-list li strong{color:var(--text-main);font-weight:600;}

/* Stats */
.stats-section{position:relative;background:url('/assets/images/backpic/back-2.jpg') center/cover fixed no-repeat;padding:84px 0;border-top:1px solid var(--border-white);border-bottom:1px solid var(--border-white);}
.stats-section::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(13,14,18,0.95) 30%,rgba(255,106,0,0.16));}
.stats-grid{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stats-card{background:rgba(26,27,34,0.68);border:1px solid var(--border-white);border-radius:var(--radius-card);padding:32px 24px;text-align:center;backdrop-filter:blur(4px);}
.stats-card .stat-num{font-size:44px;font-weight:900;color:var(--secondary);font-variant-numeric:tabular-nums;line-height:1.2;margin-bottom:6px;}
.stats-card .stat-label{color:var(--text-secondary);font-size:14px;}

/* News */
.news-section{background:var(--bg-dark);}
.news-layout{display:grid;grid-template-columns:1fr 320px;gap:40px;}
.news-list{display:flex;flex-direction:column;gap:14px;}
.news-item{display:flex;align-items:center;gap:18px;background:var(--bg-card);border:1px solid var(--border-white);border-radius:14px;padding:18px 22px;transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease;}
.news-item:hover{border-color:var(--border-orange);transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.news-item .news-date{flex-shrink:0;text-align:center;background:rgba(255,106,0,0.1);border-radius:10px;padding:8px 10px;min-width:58px;}
.news-item .news-date .day{display:block;font-size:20px;font-weight:800;color:var(--primary);line-height:1.1;}
.news-item .news-date .month{display:block;font-size:12px;color:var(--text-weak);}
.news-item .news-content{flex:1;}
.news-item .news-content h4{font-size:16px;font-weight:700;line-height:1.5;margin-bottom:4px;transition:color .2s;}
.news-item:hover .news-content h4{color:var(--primary);}
.news-item .news-content p{font-size:14px;color:var(--text-secondary);line-height:1.65;}
.news-side{display:flex;flex-direction:column;gap:16px;}
.news-side-box{background:var(--bg-card);border:1px solid var(--border-white);border-radius:14px;padding:22px;}
.news-side-box h4{font-size:17px;font-weight:800;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border-white);}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;}
.tag-list a{display:inline-block;background:var(--bg-float);border:1px solid var(--border-white);color:var(--text-secondary);font-size:13px;padding:5px 14px;border-radius:999px;transition:background .2s ease,border-color .2s,color .2s;}
.tag-list a:hover{background:rgba(255,106,0,0.12);border-color:var(--primary);color:var(--primary);}
.side-btn{display:flex;align-items:center;justify-content:center;gap:8px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#141414;font-weight:700;font-size:14px;padding:12px 18px;border-radius:10px;transition:transform .2s ease,box-shadow .2s ease;}
.side-btn:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(255,106,0,0.35);}

/* Testimonials */
.testimonials{background:var(--bg-panel);border-top:1px solid var(--border-white);border-bottom:1px solid var(--border-white);}
.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.testimonial-card{background:var(--bg-card);border:1px solid var(--border-white);border-radius:var(--radius-card);padding:26px;transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;}
.testimonial-card:hover{transform:translateY(-4px);border-color:var(--border-orange);box-shadow:var(--shadow-hover);}
.testimonial-card .quote-icon{color:var(--primary);font-size:22px;opacity:.55;margin-bottom:14px;}
.testimonial-card .quote-text{color:var(--text-main);font-size:15px;line-height:1.8;margin-bottom:20px;}
.testimonial-user{display:flex;align-items:center;gap:12px;padding-top:14px;border-top:1px solid var(--border-white);}
.testimonial-user .avatar{width:42px;height:42px;border-radius:50%;background:rgba(255,106,0,0.18);display:flex;align-items:center;justify-content:center;color:var(--primary);font-weight:800;font-size:16px;flex-shrink:0;}
.testimonial-user .user-info{flex:1;}
.testimonial-user .user-name{font-weight:700;font-size:14px;margin-bottom:2px;}
.testimonial-user .user-role{font-size:12px;color:var(--text-weak);}
.stars{color:var(--secondary);font-size:13px;letter-spacing:1px;margin-top:2px;}

/* FAQ */
.faq-section{background:var(--bg-dark);}
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px;}
.faq-item{background:var(--bg-card);border:1px solid var(--border-white);border-radius:13px;overflow:hidden;transition:border-color .25s ease,box-shadow .25s ease;}
.faq-item.active{border-color:var(--border-orange);box-shadow:0 4px 20px rgba(255,106,0,0.1);}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 22px;cursor:pointer;text-align:left;background:none;color:var(--text-main);font-size:16px;font-weight:700;line-height:1.5;transition:color .2s ease;}
.faq-question:hover{color:var(--primary);}
.faq-question .faq-icon{flex-shrink:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:rgba(255,106,0,0.12);color:var(--primary);font-size:16px;transition:transform .25s ease,background .25s ease,color .25s ease;}
.faq-item.active .faq-icon{transform:rotate(45deg);background:var(--primary);color:#fff;}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 22px;}
.faq-answer p{padding-bottom:20px;color:var(--text-secondary);font-size:15px;line-height:1.8;}

/* CTA / Download */
.cta-section{position:relative;background:linear-gradient(120deg,#0D0E12 30%,rgba(255,106,0,0.14) 80%),url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;border-top:1px solid var(--border-white);}
.cta-section::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 80% 50%,rgba(255,106,0,0.15) 0%,transparent 55%);pointer-events:none;}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:50px;padding:92px 0;flex-wrap:wrap;}
.cta-text h2{font-size:36px;font-weight:900;line-height:1.3;margin-bottom:14px;}
.cta-text p{color:var(--text-secondary);font-size:16px;max-width:560px;line-height:1.8;}
.cta-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.cta-btn{display:inline-flex;align-items:center;gap:10px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#141414;font-weight:800;font-size:16px;padding:16px 40px;border-radius:12px;box-shadow:0 8px 26px rgba(255,106,0,0.35);transition:transform .2s ease,box-shadow .2s ease;}
.cta-btn:hover{transform:translateY(-3px);box-shadow:0 14px 36px rgba(255,106,0,0.45);}
.cta-btn:active{transform:translateY(0);}
.cta-sub-btn{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(255,255,255,0.3);color:var(--text-main);font-weight:600;font-size:15px;padding:15px 30px;border-radius:12px;transition:border-color .2s ease,color .2s ease,transform .2s ease;}
.cta-sub-btn:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);}

/* Footer */
.site-footer{background:#101116;border-top:1px solid var(--border-white);padding:70px 0 0;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{color:var(--text-secondary);font-size:14px;line-height:1.75;max-width:300px;}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px;color:var(--text-main);}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{color:var(--text-secondary);font-size:14px;transition:color .2s ease,padding-left .2s ease;}
.footer-col ul a:hover{color:var(--primary);padding-left:4px;}
.footer-bottom{border-top:1px solid var(--border-white);padding:22px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;}
.footer-bottom p{font-size:13px;color:var(--text-weak);}
.footer-bottom .legal-links{display:flex;gap:20px;}
.footer-bottom .legal-links a{font-size:13px;color:var(--text-weak);transition:color .2s;}
.footer-bottom .legal-links a:hover{color:var(--primary);}

/* Responsive */
@media(max-width:1024px){
  .category-grid{grid-template-columns:repeat(2,1fr);}
  .feature-row{grid-template-columns:1fr;gap:32px;}
  .feature-row.reverse .feature-media{order:0;}
  .news-layout{grid-template-columns:1fr;gap:32px;}
  .news-side{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px;}
  .testimonial-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .hero{padding:120px 0 64px;}
  .hero h1{font-size:42px;}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:72px 0;}
}
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:70px;left:0;right:0;background:rgba(13,14,18,0.98);backdrop-filter:blur(14px);border-bottom:1px solid var(--border-white);padding:16px 24px 24px;flex-direction:column;align-items:flex-start;gap:6px;}
  .main-nav.open{display:flex;}
  .nav-link{display:block;width:100%;padding:13px 14px;font-size:16px;}
  .nav-link.active::after{display:none;}
  .nav-toggle{display:flex;}
  .header-cta{display:none;}
  .hero{min-height:auto;padding:110px 0 56px;}
  .hero h1{font-size:34px;}
  .hero-desc{font-size:16px;}
  .hero-stats{gap:24px;}
  .stat-item .stat-num{font-size:30px;}
  .section{padding:var(--m-section-gap) 0;}
  .section-head h2{font-size:28px;}
  .category-grid{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr 1fr;}
  .testimonial-grid{grid-template-columns:1fr;}
  .news-side{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-text h2{font-size:30px;}
  .cta-actions{flex-direction:column;align-items:stretch;width:100%;}
  .cta-btn,.cta-sub-btn{width:100%;justify-content:center;}
}
@media(max-width:520px){
  .container{padding:0 18px;}
  .hero h1{font-size:28px;}
  .hero-actions{flex-direction:column;align-items:stretch;width:100%;}
  .btn{width:100%;}
  .stats-grid{grid-template-columns:1fr;}
  .stats-card .stat-num{font-size:36px;}
  .category-grid{grid-template-columns:1fr;}
  .hero-stats{flex-direction:column;gap:14px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:36px;}
  .testimonial-card{padding:20px;}
}

/* roulang page: category1 */
:root{
 --primary:#FF6A00;
 --primary-dark:#E55D00;
 --secondary:#FFB648;
 --bg-dark:#0D0E12;
 --bg-panel:#14151A;
 --bg-card:#1A1B22;
 --bg-float:#20222B;
 --text-main:#F5F4F0;
 --text-secondary:#A8A8B0;
 --text-weak:#6E6E78;
 --border-white:rgba(255,255,255,0.08);
 --border-orange:rgba(255,106,0,0.5);
 --radius-card:16px;
 --radius-btn:10px;
 --radius-img:12px;
 --shadow-card:0 4px 20px rgba(0,0,0,0.25);
 --shadow-hover:0 12px 32px rgba(255,106,0,0.15);
 --font-stack:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",sans-serif;
 --container-max:1200px;
 --section-gap:96px;
 --m-section-gap:64px;
}
html{scroll-behavior:smooth;}
body{font-family:var(--font-stack);background:var(--bg-dark);color:var(--text-main);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease;}
button,input,textarea{font-family:inherit;font-size:inherit;color:inherit;background:none;border:none;outline:none;}
.container{max-width:var(--container-max);margin:0 auto;padding:0 24px;}
.section{padding:var(--section-gap) 0;}
.section-head{text-align:center;max-width:760px;margin:0 auto 56px;}
.section-head .section-tag{display:inline-block;background:rgba(255,106,0,0.12);color:var(--secondary);font-size:13px;font-weight:600;padding:5px 16px;border-radius:999px;margin-bottom:16px;letter-spacing:.5px;}
.section-head h2{font-size:34px;font-weight:800;line-height:1.3;margin-bottom:12px;letter-spacing:-.5px;}
.section-head p{color:var(--text-secondary);font-size:16px;line-height:1.8;}
a:focus-visible,button:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px;}

/* Header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(13,14,18,0.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border-white);transition:background .3s ease,box-shadow .3s ease;}
.site-header.scrolled{background:rgba(13,14,18,0.88);box-shadow:0 6px 24px rgba(0,0,0,0.35);}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px;}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:20px;letter-spacing:-.5px;color:var(--text-main);flex-shrink:0;}
.logo-mark{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:10px;padding:6px;transition:transform .25s ease;}
.logo:hover .logo-mark{transform:rotate(-8deg) scale(1.05);}
.logo-mark svg{width:100%;height:100%;}
.logo span.logo-text{white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:4px;}
.nav-link{display:block;padding:9px 18px;font-size:15px;font-weight:500;color:var(--text-secondary);border-radius:8px;position:relative;transition:color .2s ease,background .2s ease;}
.nav-link:hover{color:var(--text-main);background:rgba(255,255,255,0.04);}
.nav-link.active{color:var(--primary);font-weight:600;}
.nav-link.active::after{content:"";position:absolute;left:18px;right:18px;bottom:2px;height:2px;background:linear-gradient(90deg,var(--primary),var(--secondary));border-radius:2px;}
.header-cta{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#141414;font-weight:700;font-size:14px;padding:9px 22px;border-radius:var(--radius-btn);transition:transform .2s ease,box-shadow .2s ease;box-shadow:0 4px 16px rgba(255,106,0,0.25);white-space:nowrap;margin-left:8px;}
.header-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,106,0,0.35);}
.header-cta:active{transform:translateY(0);}
.nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border-radius:10px;color:var(--text-main);background:rgba(255,255,255,0.05);cursor:pointer;transition:background .2s;}
.nav-toggle:hover{background:rgba(255,255,255,0.1);}
.nav-toggle i{font-size:20px;}

/* Category Hero */
.category-hero{position:relative;padding:160px 0 84px;background:linear-gradient(90deg,rgba(13,14,18,0.94) 20%,rgba(13,14,18,0.78) 65%,rgba(255,106,0,0.08) 100%),url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;border-bottom:1px solid var(--border-white);overflow:hidden;}
.hero-mask{position:absolute;inset:0;background:radial-gradient(ellipse at 78% 30%,rgba(255,106,0,0.10) 0%,transparent 55%);pointer-events:none;}
.category-hero .container{position:relative;z-index:2;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-weak);margin-bottom:24px;}
.breadcrumb a{color:var(--text-weak);transition:color .2s;}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb-sep{color:var(--text-weak);}
.breadcrumb-current{color:var(--secondary);font-weight:500;}
.category-hero h1{font-size:44px;font-weight:900;line-height:1.2;margin-bottom:18px;letter-spacing:-.5px;}
.category-hero h1 .highlight{color:var(--secondary);}
.category-hero p{font-size:16px;color:var(--text-secondary);max-width:680px;line-height:1.8;margin-bottom:8px;}

/* Filter Bar */
.filter-section{padding:48px 0 0;background:var(--bg-dark);}
.filter-bar{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;padding-bottom:8px;}
.filter-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 24px;border-radius:999px;background:var(--bg-card);border:1px solid var(--border-white);color:var(--text-secondary);font-size:14px;cursor:pointer;transition:all .2s ease;min-height:42px;}
.filter-btn:hover{border-color:var(--primary);color:var(--text-main);background:rgba(255,106,0,0.08);}
.filter-btn.active{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#141414;border-color:transparent;font-weight:700;box-shadow:0 4px 16px rgba(255,106,0,0.25);}
.filter-btn i{font-size:13px;}

/* Video Grid */
.video-section{padding:64px 0 var(--section-gap);}
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.video-card{background:var(--bg-card);border:1px solid var(--border-white);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;display:flex;flex-direction:column;}
.video-card:hover{transform:translateY(-4px);border-color:var(--border-orange);box-shadow:var(--shadow-hover);}
.card-img{position:relative;height:200px;overflow:hidden;}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.video-card:hover .card-img img{transform:scale(1.04);}
.card-badge{position:absolute;top:12px;left:12px;display:inline-flex;align-items:center;gap:5px;background:rgba(255,106,0,0.15);color:var(--secondary);font-size:13px;font-weight:600;padding:4px 14px;border-radius:999px;backdrop-filter:blur(4px);border:1px solid rgba(255,106,0,0.25);}
.card-body{padding:24px;display:flex;flex-direction:column;flex:1;}
.card-body h3{font-size:20px;font-weight:700;line-height:1.4;margin-bottom:10px;}
.card-body p{font-size:14px;color:var(--text-secondary);line-height:1.7;margin-bottom:20px;flex:1;}
.card-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--secondary);transition:gap .2s ease,color .2s ease;}
.card-link:hover{color:var(--primary);gap:12px;}
.card-link i{font-size:12px;}

/* Load More */
.load-more-wrap{text-align:center;margin-top:48px;}
.load-more-wrap .btn{min-width:200px;}

/* FAQ */
.faq-section{background:var(--bg-panel);border-top:1px solid var(--border-white);border-bottom:1px solid var(--border-white);}
.faq-list{max-width:860px;margin:0 auto;}
.faq-item{background:var(--bg-card);border:1px solid var(--border-white);border-radius:12px;margin-bottom:16px;overflow:hidden;transition:border-color .25s ease,box-shadow .25s ease;}
.faq-item.active{border-color:var(--border-orange);box-shadow:0 0 0 1px rgba(255,106,0,0.12);}
.faq-question{display:flex;justify-content:space-between;align-items:center;padding:22px 28px;cursor:pointer;font-size:17px;font-weight:600;color:var(--text-main);transition:color .2s;user-select:none;}
.faq-question:hover{color:var(--secondary);}
.faq-question i{color:var(--primary);font-size:16px;transition:transform .25s ease;flex-shrink:0;margin-left:16px;}
.faq-item.active .faq-question i{transform:rotate(45deg);}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-item.active .faq-answer{max-height:300px;}
.faq-answer p{padding:0 28px 22px;color:var(--text-secondary);line-height:1.8;font-size:15px;}

/* CTA */
.cta-section{padding:calc(var(--section-gap) * 0.75) 0;}
.cta-card{background:linear-gradient(135deg,rgba(13,14,18,0.94) 30%,rgba(255,106,0,0.14)),url('/assets/images/backpic/back-4.jpg') center/cover no-repeat;border:1px solid var(--border-white);border-radius:24px;padding:60px 56px;display:flex;align-items:center;justify-content:space-between;gap:40px;position:relative;overflow:hidden;}
.cta-card::after{content:"";position:absolute;top:-2px;left:-2px;right:-2px;height:3px;background:linear-gradient(90deg,var(--primary),var(--secondary),transparent);opacity:0.8;}
.cta-info h2{font-size:30px;font-weight:800;line-height:1.3;margin-bottom:10px;}
.cta-info p{color:var(--text-secondary);font-size:16px;}
.cta-card .btn{flex-shrink:0;padding:15px 40px;font-size:16px;}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:15px;padding:14px 34px;border-radius:var(--radius-btn);transition:transform .2s ease,box-shadow .2s ease,border-color .2s,background .2s;cursor:pointer;min-height:48px;}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#141414;box-shadow:0 6px 22px rgba(255,106,0,0.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(255,106,0,0.4);}
.btn-primary:active{transform:translateY(0);}
.btn-secondary{background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.25);color:var(--text-main);}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);background:rgba(255,106,0,0.06);}
.btn-secondary:active{transform:translateY(0);}

/* Footer */
.site-footer{background:#101116;border-top:1px solid var(--border-white);padding:72px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:48px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-secondary);line-height:1.8;max-width:300px;margin-top:14px;}
.footer-col h4{font-size:16px;font-weight:700;margin-bottom:18px;color:var(--text-main);}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a{font-size:14px;color:var(--text-secondary);transition:color .2s,padding-left .2s;}
.footer-col ul li a:hover{color:var(--primary);padding-left:4px;}
.footer-bottom{border-top:1px solid var(--border-white);padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.footer-bottom p{font-size:13px;color:var(--text-weak);margin:0;}
.legal-links{display:flex;gap:24px;}
.legal-links a{font-size:13px;color:var(--text-weak);transition:color .2s;}
.legal-links a:hover{color:var(--primary);}

/* Responsive */
@media (max-width:1200px){
 .video-grid{grid-template-columns:repeat(3,1fr);}
 .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:36px;}
}
@media (max-width:992px){
 .main-nav{position:fixed;top:70px;right:0;bottom:0;width:300px;background:var(--bg-float);flex-direction:column;padding:28px 24px;gap:10px;transform:translateX(100%);transition:transform .3s ease;border-left:1px solid var(--border-white);z-index:999;box-shadow:-8px 0 32px rgba(0,0,0,0.4);}
 .main-nav.open{transform:translateX(0);}
 .nav-link{font-size:16px;padding:12px 16px;width:100%;}
 .nav-link.active::after{content:"";position:absolute;left:16px;right:auto;bottom:auto;top:50%;transform:translateY(-50%);width:3px;height:20px;background:linear-gradient(180deg,var(--primary),var(--secondary));border-radius:2px;}
 .nav-toggle{display:flex;}
 .header-cta{display:none;}
 .category-hero{padding:140px 0 60px;}
 .category-hero h1{font-size:36px;}
 .video-grid{grid-template-columns:repeat(2,1fr);}
 .cta-card{flex-direction:column;text-align:center;padding:48px 32px;gap:28px;}
 .cta-card .btn{width:100%;max-width:280px;}
 .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
 .section{padding:var(--m-section-gap) 0;}
 .section-head h2{font-size:28px;}
 .section-head p{font-size:15px;}
 .category-hero p{font-size:15px;}
 .video-section{padding:48px 0 var(--m-section-gap);}
 .faq-question{font-size:16px;padding:18px 20px;}
 .faq-answer p{padding:0 20px 18px;}
 .footer-bottom{flex-direction:column;text-align:center;}
}
@media (max-width:576px){
 .container{padding:0 18px;}
 .category-hero{padding:120px 0 48px;}
 .category-hero h1{font-size:30px;}
 .category-hero p{font-size:14px;}
 .filter-section{padding:36px 0 0;}
 .filter-bar{flex-wrap:nowrap;overflow-x:auto;justify-content:flex-start;padding-bottom:16px;margin:0 -18px;padding-left:18px;padding-right:18px;}
 .filter-btn{flex-shrink:0;padding:9px 18px;font-size:13px;}
 .video-grid{grid-template-columns:1fr;}
 .card-img{height:190px;}
 .card-body{padding:20px;}
 .card-body h3{font-size:18px;}
 .cta-section{padding:64px 0;}
 .cta-card{padding:40px 24px;border-radius:18px;}
 .cta-info h2{font-size:24px;}
 .cta-info p{font-size:14px;}
 .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
 .legal-links{justify-content:center;}
}