/* roulang page: index */
:root{
  --primary:#2E6FE0;
  --primary-dark:#1E56B8;
  --primary-light:#EAF1FC;
  --accent:#FF7A1A;
  --accent-dark:#E66600;
  --accent-light:#FFF1E6;
  --bg:#F5F8FC;
  --card:#FFFFFF;
  --text:#243040;
  --muted:#6B7B8E;
  --border:#E3EAF3;
  --footer-bg:#16233A;
  --footer-text:#A9B8CC;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 4px 18px rgba(23,44,81,.08);
  --shadow-hover:0 12px 32px rgba(23,44,81,.13);
  --space-section:88px;
  --space-section-mobile:56px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Segoe UI",sans-serif;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  margin:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .25s ease}
a:hover{color:var(--primary-dark)}
ul,ol{list-style:none;margin:0;padding:0}
p{margin:0 0 24px}
.contaienr, .container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0}
.section-header{text-align:center;max-width:720px;margin:0 auto 52px}
.section-header h2{font-size:34px;font-weight:800;line-height:1.3;margin:0 0 14px;color:var(--text)}
.section-header p{color:var(--muted);font-size:17px;margin:0}
.section-header .header-tag{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:13px;font-weight:700;letter-spacing:2px;padding:6px 16px;border-radius:40px;margin-bottom:14px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-sm);font-weight:700;font-size:15px;line-height:1;
  padding:14px 28px;border:2px solid transparent;cursor:pointer;
  transition:all .25s ease;text-align:center;min-height:44px;white-space:nowrap;
}
.btn i{font-size:14px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,122,26,.3)}
.btn-outline{background:#fff;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary-light);color:var(--primary-dark);border-color:var(--primary)}
.btn-white-outline{background:transparent;border-color:rgba(255,255,255,.75);color:#fff}
.btn-white-outline:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-sm{padding:10px 20px;font-size:14px;min-height:38px}
.btn-xs{padding:8px 14px;font-size:13px;min-height:34px}
.btn-lg{padding:16px 36px;font-size:16px;min-height:50px}
.btn-block{width:100%}
.link-more{font-size:14px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px;transition:gap .25s ease}
.link-more:hover{gap:10px;color:var(--primary-dark)}
.badge{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:12px;font-weight:700;padding:4px 12px;border-radius:40px;line-height:1.4}
.badge-accent{background:var(--accent-light);color:var(--accent)}
/* Header */
.site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;transition:box-shadow .3s ease}
.site-header.scrolled{box-shadow:0 4px 18px rgba(23,44,81,.08)}
.header-inner{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;min-height:76px;gap:20px}
.header-logo{font-size:24px;font-weight:900;color:var(--text);white-space:nowrap;justify-self:center;line-height:1}
.header-logo span{color:var(--primary)}
.header-nav{display:flex;align-items:center;gap:4px}
.nav-left{justify-self:start}
.nav-right{justify-self:end}
.nav-link{font-size:15px;font-weight:600;color:var(--text);padding:10px 4px;margin:0 14px;position:relative;white-space:nowrap}
.nav-link::after{content:'';position:absolute;left:0;bottom:0;width:100%;height:2px;background:var(--primary);border-radius:2px;transform:scaleX(0);transition:transform .3s ease;transform-origin:center}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link:hover,.nav-link.active{color:var(--primary)}
.hamburger{display:none;background:none;border:0;cursor:pointer;width:42px;height:42px;border-radius:10px;align-items:center;justify-content:center;flex-direction:column;gap:5px;transition:background .2s}
.hamburger:hover{background:var(--primary-light)}
.hamburger span{display:block;width:20px;height:2px;background:var(--text);border-radius:2px;transition:transform .3s ease,opacity .3s ease}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.header-cta-mobile{display:none}
.mobile-menu{display:none;background:#fff;border-top:1px solid var(--border);box-shadow:0 12px 24px rgba(23,44,81,.08)}
.mobile-menu .mobile-nav{padding:12px 24px 24px;display:flex;flex-direction:column;gap:4px}
.mobile-menu .mobile-nav>a{display:block;padding:14px 12px;border-radius:10px;font-size:15px;font-weight:600;color:var(--text);line-height:1.4}
.mobile-menu .mobile-nav>a:hover,.mobile-menu .mobile-nav>a.active{background:var(--primary-light);color:var(--primary)}
.mobile-menu .mobile-nav>.btn{margin-top:12px}
/* Hero */
.hero{background:linear-gradient(180deg,#F9FBFF 0%,#fff 100%);overflow:hidden;position:relative}
.hero-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:center;padding:72px 0 64px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:var(--primary-light);color:var(--primary);border-radius:40px;padding:8px 18px;font-size:14px;font-weight:700}
.hero-badge i{font-size:14px}
.hero h1{font-size:42px;line-height:1.25;font-weight:800;margin:22px 0 18px;color:var(--text)}
.hero h1 .hl{color:var(--primary);position:relative}
.hero h1 .hl::after{content:'';position:absolute;left:0;bottom:6px;width:100%;height:10px;background:rgba(46,111,224,.14);z-index:-1;border-radius:4px}
.hero-sub{font-size:17px;color:var(--muted);line-height:1.85;margin-bottom:34px;max-width:520px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:30px}
.hero-points{display:flex;flex-wrap:wrap;gap:18px 28px}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted);font-weight:500}
.hero-points li i{color:var(--primary);font-size:15px}
.hero-visual{position:relative}
.hero-visual img{border-radius:var(--radius);width:100%;height:440px;object-fit:cover;box-shadow:var(--shadow-hover)}
.hero-visual::after{content:'';position:absolute;inset:0;border-radius:var(--radius);background:linear-gradient(180deg,rgba(46,111,224,.08) 0%,rgba(255,255,255,0) 40%);pointer-events:none}
.hero-float{position:absolute;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-hover);padding:16px 22px;display:flex;align-items:center;gap:12px;z-index:2}
.hero-float .icon{width:44px;height:44px;border-radius:12px;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:18px}
.hero-float .num{font-size:24px;font-weight:800;color:var(--text);line-height:1.2}
.hero-float .label{font-size:12px;color:var(--muted);line-height:1.4}
.hero-float.f1{top:24px;right:-18px}
.hero-float.f2{bottom:24px;left:-18px}
/* Trust bar */
.trust-bar{background:#fff;border-top:1px solid var(--border);padding:22px 0}
.trust-items{display:flex;justify-content:center;gap:48px;flex-wrap:wrap}
.trust-item{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:15px}
.trust-item i{color:var(--primary);font-size:20px;background:var(--primary-light);width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center}
/* Products */
.products-section{background:var(--bg)}
.product-grid{row-gap:28px}
.product-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;border:1px solid rgba(227,234,243,.5);transition:transform .3s ease,box-shadow .3s ease;height:100%;display:flex;flex-direction:column}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.product-thumb{position:relative;overflow:hidden;height:210px}
.product-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.product-card:hover .product-thumb img{transform:scale(1.05)}
.product-tag{position:absolute;top:14px;left:14px;background:var(--accent);color:#fff;font-size:12px;font-weight:700;padding:5px 14px;border-radius:30px;box-shadow:0 4px 10px rgba(255,122,26,.35)}
.product-body{padding:24px 24px 22px;display:flex;flex-direction:column;flex:1}
.product-body h3{font-size:19px;font-weight:700;margin:0 0 8px;color:var(--text)}
.product-body p{font-size:14px;color:var(--muted);line-height:1.7;margin:0 0 16px;flex:1}
.product-foot{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;padding-top:14px;border-top:1px solid var(--border)}
.product-price{font-size:18px;font-weight:800;color:var(--accent)}
.product-param{font-size:12px;color:var(--muted);background:var(--bg);padding:4px 12px;border-radius:30px}
.product-actions{display:flex;align-items:center;justify-content:space-between;gap:12px}
.product-actions .btn{flex:1}
/* Testimonials */
.testimonials-section{background:#fff}
.testimonial-carousel{position:relative;max-width:1160px;margin:0 auto}
.testimonial-track{display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;padding:8px 4px 24px;scrollbar-width:none}
.testimonial-track::-webkit-scrollbar{display:none}
.testimonial-card{flex:0 0 calc((100% - 48px)/3);scroll-snap-align:start;background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px 28px;display:flex;flex-direction:column;transition:transform .3s ease,box-shadow .3s ease}
.testimonial-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.testimonial-stars{display:flex;gap:4px;color:var(--accent);font-size:15px;margin-bottom:18px}
.testimonial-text{font-size:15px;color:var(--text);line-height:1.8;flex:1;margin:0 0 22px}
.testimonial-user{display:flex;align-items:center;gap:12px}
.testimonial-avatar{width:46px;height:46px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:800;color:#fff;flex-shrink:0}
.testimonial-user .name{font-size:15px;font-weight:700;color:var(--text);line-height:1.3}
.testimonial-user .role{font-size:13px;color:var(--muted)}
.carousel-arrows{display:flex;justify-content:center;gap:12px;margin-top:12px}
.carousel-arrow{width:46px;height:46px;border-radius:50%;border:2px solid var(--primary);background:#fff;color:var(--primary);font-size:15px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .25s ease}
.carousel-arrow:hover{background:var(--primary);color:#fff;box-shadow:var(--shadow-hover)}
/* Guarantee */
.guarantee-section{background:var(--bg)}
.guarantee-box{background:#fff;border-radius:24px;box-shadow:var(--shadow);padding:52px 40px;border:1px solid rgba(227,234,243,.5)}
.guarantee-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:36px}
.guarantee-item{display:flex;align-items:flex-start;gap:16px}
.guarantee-icon{width:52px;height:52px;border-radius:14px;background:var(--primary-light);color:var(--primary);font-size:22px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.guarantee-item h3{font-size:17px;font-weight:700;margin:0 0 6px;color:var(--text)}
.guarantee-item p{font-size:14px;color:var(--muted);line-height:1.65;margin:0}
/* News */
.news-section{background:#fff}
.post-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease;height:100%}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.post-featured .post-thumb{position:relative;height:320px;overflow:hidden}
.post-featured .post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.post-featured:hover .post-thumb img{transform:scale(1.03)}
.post-featured .post-thumb .badge{position:absolute;top:16px;left:16px}
.post-body{padding:24px 26px}
.post-featured .post-body h3{font-size:22px;font-weight:700;margin:0 0 10px;line-height:1.45}
.post-featured .post-body h3 a{color:var(--text)}
.post-featured .post-body h3 a:hover{color:var(--primary)}
.post-excerpt{font-size:14px;color:var(--muted);line-height:1.75;margin:0 0 16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted)}
.post-meta .post-time{display:inline-flex;align-items:center;gap:6px}
.post-more{font-size:14px;font-weight:700;color:var(--primary);display:inline-flex;align-items:center;gap:6px;transition:gap .25s ease}
.post-more:hover{gap:10px;color:var(--primary-dark)}
.post-list{display:flex;flex-direction:column;gap:16px;height:100%}
.post-list-item{padding:0;display:flex}
.post-list-item .post-list-link{display:flex;gap:18px;padding:20px;width:100%;height:100%}
.post-list-item .post-list-thumb{width:120px;height:100px;border-radius:12px;overflow:hidden;flex-shrink:0}
.post-list-item .post-list-thumb img{width:100%;height:100%;object-fit:cover}
.post-list-item .post-list-body{flex:1;display:flex;flex-direction:column;justify-content:center;min-width:0}
.post-list-top{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.post-list-item h3{font-size:16px;font-weight:700;line-height:1.45;margin:0 0 6px}
.post-list-item h3 a{color:var(--text)}
.post-list-item h3 a:hover{color:var(--primary)}
.post-list-item .post-excerpt{font-size:13px;margin:0 0 8px;-webkit-line-clamp:1}
.post-list-time{font-size:12px;color:var(--muted);display:inline-flex;align-items:center;gap:5px}
.empty-state{border:2px dashed var(--border);border-radius:var(--radius);padding:60px 20px;text-align:center;background:var(--bg)}
.empty-state i{font-size:40px;color:#b8c9dd;display:block;margin-bottom:14px}
.empty-state p{color:var(--muted);font-size:15px;margin:0}
/* FAQ */
.faq-section{background:var(--bg)}
.faq-accordion{max-width:900px;margin:0 auto}
.faq-accordion .accordion-item{background:#fff;border-radius:var(--radius);border:1px solid var(--border);margin-bottom:16px;box-shadow:var(--shadow);overflow:hidden;border-left:4px solid var(--primary);transition:box-shadow .3s ease}
.faq-accordion .accordion-item:hover{box-shadow:var(--shadow-hover)}
.faq-accordion .accordion-title{font-size:16px;font-weight:700;color:var(--text);padding:22px 26px;background:#fff;border:none;line-height:1.5;margin:0}
.faq-accordion .accordion-title:hover{background:var(--primary-light);color:var(--text)}
.faq-accordion .accordion-item.is-active>.accordion-title{background:var(--primary-light);color:var(--primary)}
.faq-accordion .accordion-title:before{content:'+';float:right;margin-left:12px;font-size:24px;font-weight:400;color:var(--primary);line-height:1;transition:transform .3s ease}
.faq-accordion .accordion-item.is-active>.accordion-title:before{content:'−';color:var(--primary)}
.faq-accordion .accordion-content{border:none;background:#fff;color:var(--muted);font-size:15px;line-height:1.9;padding:0 26px 24px 26px}
.faq-accordion .accordion-content p{margin:0}
/* CTA */
.cta-section{padding:60px 0 88px}
.cta-box{background:var(--primary);border-radius:24px;padding:60px 56px;position:relative;overflow:hidden;box-shadow:var(--shadow-hover)}
.cta-box::before{content:'';position:absolute;top:0;right:0;width:50%;height:100%;background:url('/assets/images/backpic/back-3.webp') no-repeat center/cover;opacity:.12;pointer-events:none}
.cta-content{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap}
.cta-text h2{color:#fff;font-size:30px;font-weight:800;margin:0 0 10px;line-height:1.35}
.cta-text p{color:rgba(255,255,255,.85);font-size:16px;margin:0}
.cta-buttons{display:flex;gap:14px;flex-wrap:wrap}
/* Footer */
.site-footer{background:var(--footer-bg);color:var(--footer-text);padding:64px 0 0;font-size:14px}
.footer-top{display:grid;grid-template-columns:1.4fr 2fr;gap:48px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand-desc{font-size:14px;line-height:1.8;margin:18px 0 20px;max-width:340px}
.footer-logo{font-size:24px;font-weight:900;color:#fff;line-height:1}
.footer-logo span{color:#5C9AFF}
.footer-social{display:flex;gap:12px}
.footer-social a{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.08);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;transition:all .25s ease}
.footer-social a:hover{background:var(--accent);color:#fff;transform:translateY(-3px)}
.footer-links-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.footer-links-grid h4{color:#fff;font-size:15px;font-weight:700;margin:0 0 16px}
.footer-links-grid ul li{margin-bottom:10px}
.footer-links-grid ul li a{color:var(--footer-text);font-size:14px}
.footer-links-grid ul li a:hover{color:var(--accent)}
.footer-links-grid ul li span{color:var(--footer-text);font-size:13px}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:26px 0;color:rgba(255,255,255,.45);font-size:13px}
.footer-bottom a{color:rgba(255,255,255,.55);margin-left:6px}
.footer-bottom a:hover{color:var(--accent)}
.footer-bottom .beian{color:rgba(255,255,255,.35)}
/* Focus / a11y */
a:focus-visible,button:focus-visible{outline:3px solid rgba(46,111,224,.4);outline-offset:2px;border-radius:4px}
/* Responsive */
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr 1fr;gap:36px;padding:56px 0 48px}
  .hero h1{font-size:34px}
  .hero-visual img{height:360px}
  .guarantee-grid{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr}
  .testimonial-card{flex:0 0 calc((100% - 24px)/2)}
}
@media(max-width:640px){
  .section{padding:var(--space-section-mobile) 0}
  .header-inner{grid-template-columns:auto 1fr auto;min-height:64px;gap:10px}
  .header-logo{font-size:20px}
  .nav-left,.nav-right{display:none}
  .hamburger{display:flex}
  .header-cta-mobile{display:inline-flex}
  .header-cta{display:none}
  .hero-inner{grid-template-columns:1fr;padding:44px 0 40px}
  .hero h1{font-size:29px}
  .hero-sub{font-size:16px}
  .hero-visual img{height:280px}
  .hero-float.f1{top:14px;right:10px}
  .hero-float.f2{bottom:14px;left:10px}
  .hero-float .num{font-size:20px}
  .hero-float .icon{width:38px;height:38px;font-size:15px}
  .trust-items{gap:18px;flex-direction:column;align-items:flex-start}
  .trust-item{width:100%}
  .section-header h2{font-size:26px}
  .section-header p{font-size:15px}
  .product-grid{row-gap:20px}
  .product-thumb{height:190px}
  .product-actions{flex-direction:column;align-items:stretch}
  .product-actions .link-more{justify-content:center}
  .testimonial-card{flex:0 0 100%}
  .testimonial-track{gap:16px}
  .guarantee-grid{grid-template-columns:1fr;gap:28px}
  .guarantee-box{padding:36px 24px}
  .post-featured .post-thumb{height:220px}
  .post-list-item .post-list-thumb{width:88px;height:80px}
  .post-list-item .post-list-link{padding:14px;gap:12px}
  .post-list-item h3{font-size:15px}
  .post-list-item .post-excerpt{display:none}
  .cta-section{padding:40px 0 56px}
  .cta-box{padding:40px 24px;border-radius:16px}
  .cta-text h2{font-size:24px}
  .cta-buttons{width:100%}
  .cta-buttons .btn{flex:1 1 100%}
  .footer-links-grid{grid-template-columns:1fr 1fr;gap:24px}
  .footer-bottom{flex-direction:column;text-align:center}
  .btn{min-height:48px}
}
@media(min-width:641px) and (max-width:1024px){
  .testimonial-card{flex:0 0 calc((100% - 24px)/2)}
}

/* roulang page: category1 */
:root {
            --primary: #2E6FE0;
            --primary-dark: #1f5bc4;
            --primary-light: #EFF5FE;
            --accent: #FF7A1A;
            --accent-dark: #e66a08;
            --bg: #F5F8FC;
            --card: #FFFFFF;
            --text: #243040;
            --muted: #6B7B8E;
            --border: #E3EAF3;
            --footer-bg: #16233A;
            --footer-text: #9FB0C7;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 18px rgba(23, 44, 81, .08);
            --shadow-lg: 0 12px 32px rgba(23, 44, 81, .13);
            --space: 88px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

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

        .section-block {
            padding: var(--space) 0;
        }

        .section-eyebrow {
            display: inline-block;
            padding: 6px 16px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .04em;
            margin-bottom: 14px;
        }

        .section-head {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 52px;
        }

        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.35;
            color: var(--text);
            margin-bottom: 14px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--muted);
            line-height: 1.8;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 26px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 700;
            line-height: 1;
            cursor: pointer;
            border: 1px solid transparent;
            transition: all .25s ease;
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(46, 111, 224, .35);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff !important;
            border-color: var(--accent);
            box-shadow: 0 6px 18px rgba(255, 122, 26, .24);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(255, 122, 26, .32);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(255, 122, 26, .2);
        }

        .btn-outline {
            background: #fff;
            color: var(--primary) !important;
            border-color: #CCDDF5;
        }

        .btn-outline:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-sm {
            height: 40px;
            padding: 0 18px;
            font-size: 14px;
        }

        .btn-xs {
            height: 34px;
            padding: 0 14px;
            font-size: 13px;
        }

        .btn-block {
            width: 100%;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 999;
            background: #fff;
            border-bottom: 1px solid var(--border);
            transition: box-shadow .3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 6px 24px rgba(23, 44, 81, .08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            position: relative;
        }

        .header-logo {
            font-size: 24px;
            font-weight: 800;
            color: var(--text);
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            white-space: nowrap;
            letter-spacing: -.01em;
            display: flex;
            align-items: center;
            line-height: 1;
        }

        .header-logo span {
            color: var(--primary);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            border-radius: 8px;
            position: relative;
            transition: color .2s ease, background .2s ease;
        }

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

        .nav-link.active {
            color: var(--primary);
            font-weight: 700;
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

        .header-cta {
            margin-left: 10px;
        }

        .header-cta-mobile {
            display: none;
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
        }

        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--text);
            transition: background .2s;
        }

        .hamburger:hover span {
            background: var(--primary);
        }

        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 12px 0 20px;
            box-shadow: 0 18px 36px rgba(23, 44, 81, .12);
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 8px 24px;
        }

        .mobile-nav a {
            display: block;
            padding: 12px 14px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            border-radius: 10px;
        }

        .mobile-nav a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .mobile-nav a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 700;
        }

        .mobile-nav .btn {
            margin-top: 12px;
        }

        /* ===== Category Hero ===== */
        .cat-hero {
            position: relative;
            background: linear-gradient(135deg, #EDF3FC 0%, #F8FBFF 100%);
            padding: 72px 0 64px;
            overflow: hidden;
        }

        .cat-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: .18;
            z-index: 0;
        }

        .cat-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(245, 248, 252, .96) 0%, rgba(245, 248, 252, .84) 100%);
            z-index: 0;
        }

        .cat-hero .container {
            position: relative;
            z-index: 1;
        }

        .cat-hero-inner {
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 48px;
            align-items: center;
        }

        .cat-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: rgba(46, 111, 224, .1);
            border: 1px solid rgba(46, 111, 224, .2);
            color: var(--primary);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 700;
            margin-bottom: 18px;
            backdrop-filter: blur(4px);
        }

        .cat-hero h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 18px;
            letter-spacing: -.01em;
        }

        .cat-hero h1 span {
            color: var(--primary);
        }

        .cat-hero-desc {
            font-size: 17px;
            color: var(--muted);
            line-height: 1.8;
            max-width: 560px;
            margin-bottom: 30px;
        }

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

        .cat-hero-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 30px 28px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(255, 255, 255, .7);
        }

        .cat-hero-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .cat-hero-card h3 i {
            color: var(--primary);
            font-size: 20px;
        }

        .cat-hero-card ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .cat-hero-card li {
            display: flex;
            gap: 12px;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
        }

        .cat-hero-card li i {
            color: var(--accent);
            margin-top: 4px;
            font-size: 14px;
            width: 16px;
            text-align: center;
            flex-shrink: 0;
        }

        .cat-hero-card li strong {
            color: var(--text);
            font-weight: 600;
        }

        /* ===== Intro Section ===== */
        .intro-section {
            background: #fff;
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 52px;
            align-items: center;
        }

        .intro-media {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            position: relative;
        }

        .intro-media img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .intro-media:hover img {
            transform: scale(1.03);
        }

        .intro-media .intro-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            padding: 6px 14px;
            background: var(--accent);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            border-radius: 999px;
            box-shadow: 0 6px 18px rgba(255, 122, 26, .35);
        }

        .intro-content h2 {
            font-size: 30px;
            font-weight: 800;
            line-height: 1.4;
            color: var(--text);
            margin-bottom: 12px;
        }

        .intro-content>p {
            font-size: 16px;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .intro-points {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .intro-point {
            display: flex;
            gap: 16px;
            padding: 18px 20px;
            background: var(--bg);
            border-radius: 12px;
            border: 1px solid var(--border);
            transition: box-shadow .25s ease, transform .25s ease;
        }

        .intro-point:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow);
            border-color: #CDDDF2;
        }

        .intro-point-icon {
            width: 44px;
            height: 44px;
            flex-shrink: 0;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }

        .intro-point h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }

        .intro-point p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.65;
        }

        /* ===== Spec Section ===== */
        .spec-section {
            background: var(--bg);
        }

        .spec-wrap {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 32px;
            margin-top: 8px;
        }

        .spec-intro {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .spec-intro h3 {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
        }

        .spec-intro p {
            font-size: 14px;
            color: var(--muted);
            max-width: 460px;
            line-height: 1.7;
        }

        .spec-table-wrap {
            overflow-x: auto;
            border-radius: 12px;
            border: 1px solid var(--border);
        }

        .spec-table {
            width: 100%;
            min-width: 720px;
            border-collapse: collapse;
            background: #fff;
        }

        .spec-table th {
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            padding: 15px 18px;
            text-align: left;
            letter-spacing: .02em;
            white-space: nowrap;
        }

        .spec-table td {
            padding: 16px 18px;
            font-size: 14px;
            color: var(--text);
            border-bottom: 1px solid #EDF2F8;
            vertical-align: top;
            line-height: 1.6;
        }

        .spec-table tr:last-child td {
            border-bottom: none;
        }

        .spec-table tbody tr {
            transition: background .2s ease;
        }

        .spec-table tbody tr:hover {
            background: #F5F9FF;
        }

        .spec-table .spec-type {
            font-weight: 700;
            color: var(--primary);
        }

        .spec-table .spec-desc {
            color: var(--muted);
            font-size: 13px;
        }

        /* ===== Scene Section ===== */
        .scene-section {
            background: #fff;
        }

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

        .scene-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 26px 22px;
            border: 1px solid var(--border);
            transition: transform .3s ease, box-shadow .3s ease;
            position: relative;
            overflow: hidden;
        }

        .scene-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--primary);
            opacity: 0;
            transition: opacity .3s ease;
        }

        .scene-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .scene-card:hover::before {
            opacity: 1;
        }

        .scene-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
        }

        .scene-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .scene-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.65;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            background: var(--bg);
        }

        .faq-list {
            max-width: 840px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border-left: 4px solid var(--primary);
            overflow: hidden;
            transition: box-shadow .25s ease;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-lg);
        }

        .faq-toggle {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 20px 24px;
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.5;
        }

        .faq-toggle i {
            font-size: 16px;
            color: var(--primary);
            flex-shrink: 0;
            transition: transform .3s ease;
        }

        .faq-item.open .faq-toggle i {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 24px 22px;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.8;
        }

        /* ===== Light CTA ===== */
        .cta-light-section {
            background: #fff;
            padding: 0 0 var(--space);
        }

        .light-cta {
            background: var(--primary);
            border-radius: 24px;
            padding: 48px 52px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 36px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 16px 40px rgba(46, 111, 224, .22);
        }

        .light-cta::after {
            content: "";
            position: absolute;
            right: -40px;
            top: -40px;
            width: 260px;
            height: 260px;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: .12;
            border-radius: 50%;
        }

        .light-cta-info {
            position: relative;
            z-index: 1;
        }

        .light-cta-info h2 {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .light-cta-info p {
            font-size: 15px;
            color: rgba(255, 255, 255, .82);
            line-height: 1.7;
        }

        .light-cta-phone {
            font-size: 16px;
            color: #fff;
            font-weight: 700;
            margin-top: 10px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .light-cta-phone i {
            color: #FFD9BD;
        }

        .light-cta-actions {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .light-cta .btn-cta-main {
            background: var(--accent);
            color: #fff;
            border: none;
            min-width: 180px;
        }

        .light-cta .btn-cta-main:hover {
            background: var(--accent-dark);
            box-shadow: 0 10px 28px rgba(255, 122, 26, .4);
        }

        .light-cta .btn-cta-ghost {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .7);
        }

        .light-cta .btn-cta-ghost:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--footer-bg);
            color: var(--footer-text);
            padding: 64px 0 0;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.2fr 1.8fr;
            gap: 48px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .footer-logo {
            font-size: 26px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            line-height: 1;
        }

        .footer-logo span {
            color: #6EA2F0;
        }

        .footer-brand-desc {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, .64);
            max-width: 360px;
            margin-bottom: 22px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 255, 255, .08);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: background .25s ease, transform .25s ease;
        }

        .footer-social a:hover {
            background: var(--accent);
            transform: translateY(-3px);
        }

        .footer-links-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 36px;
        }

        .footer-links-grid h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: .02em;
        }

        .footer-links-grid ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links-grid a,
        .footer-links-grid span {
            font-size: 14px;
            color: rgba(255, 255, 255, .62);
            line-height: 1.6;
            transition: color .2s ease;
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding: 22px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, .48);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, .6);
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root {
                --space: 64px;
            }

            .header-nav {
                gap: 2px;
            }

            .nav-link {
                padding: 8px 12px;
                font-size: 14px;
            }

            .cat-hero {
                padding: 56px 0 52px;
            }

            .cat-hero h1 {
                font-size: 34px;
            }

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

        @media (max-width: 800px) {
            .header-inner {
                height: 64px;
            }

            .hamburger {
                display: flex;
            }

            .header-nav {
                display: none;
            }

            .header-logo {
                position: static;
                transform: none;
                font-size: 22px;
                order: 2;
            }

            .header-cta-mobile {
                display: block;
                order: 3;
            }

            .header-inner {
                justify-content: space-between;
            }

            .header-cta-desktop {
                display: none;
            }

            .cat-hero-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .cat-hero-card {
                padding: 24px 22px;
            }

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

            .intro-media img {
                aspect-ratio: 16 / 10;
            }

            .spec-wrap {
                padding: 20px;
            }

            .light-cta {
                flex-direction: column;
                padding: 36px 28px;
                align-items: flex-start;
            }

            .light-cta-actions {
                width: 100%;
                flex-direction: column;
                align-items: stretch;
            }

            .light-cta .btn {
                width: 100%;
            }

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

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

        @media (max-width: 640px) {
            :root {
                --space: 52px;
            }

            .container {
                padding: 0 18px;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .section-head p {
                font-size: 15px;
            }

            .cat-hero {
                padding: 44px 0 40px;
            }

            .cat-hero h1 {
                font-size: 28px;
            }

            .cat-hero-desc {
                font-size: 15px;
            }

            .cat-hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .cat-hero-actions .btn {
                width: 100%;
            }

            .cat-hero-card {
                padding: 20px 18px;
            }

            .intro-content h2 {
                font-size: 24px;
            }

            .intro-point {
                flex-direction: column;
                gap: 12px;
                padding: 16px;
            }

            .scene-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .spec-wrap {
                padding: 16px;
            }

            .spec-intro {
                flex-direction: column;
                gap: 8px;
            }

            .light-cta-info h2 {
                font-size: 22px;
            }

            .footer-links-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .footer-bottom {
                justify-content: center;
                text-align: center;
            }
        }

        @media (max-width: 420px) {
            .footer-links-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: article */
:root {
  --primary: #2E6FE0;
  --primary-dark: #1F5BC2;
  --primary-light: #F0F6FF;
  --accent: #FF7A1A;
  --accent-dark: #E96A0C;
  --bg: #F5F8FC;
  --card: #FFFFFF;
  --text: #243040;
  --muted: #6B7B8E;
  --border: #E4EBF4;
  --footer-bg: #16233A;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 18px rgba(23,44,81,.08);
  --shadow-lg: 0 12px 32px rgba(23,44,81,.13);
  --transition: all .3s ease;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: var(--primary); transition: var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style-position: inside; }
button { border: none; background: none; cursor: pointer; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  line-height: 1;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  font-family: inherit;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.7); }
.btn-outline-light:hover { background: rgba(255,255,255,.12); color: #fff; transform: translateY(-2px); }
.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn-lg { padding: 16px 32px; font-size: 16px; }
.btn-block { display: flex; width: 100%; }
.btn-xs { padding: 8px 16px; font-size: 13px; }
.badge { display: inline-flex; align-items: center; padding: 4px 12px; border-radius: 999px; background: var(--primary-light); color: var(--primary); font-size: 13px; font-weight: 600; }
.tag { display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; background: var(--bg); border: 1px solid var(--border); border-radius: 999px; color: var(--muted); font-size: 13px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s ease;
}
.site-header.scrolled { box-shadow: 0 4px 18px rgba(23,44,81,.08); }
.header-inner {
  display: flex;
  align-items: center;
  min-height: 76px;
  justify-content: space-between;
  gap: 16px;
  position: relative;
}
.hamburger {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  border: 1px solid var(--border);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: #fff;
  flex-shrink: 0;
}
.hamburger span { display: block; width: 18px; height: 2px; border-radius: 2px; background: var(--text); transition: var(--transition); }
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-left, .nav-right { display: flex; align-items: center; gap: 32px; }
.header-logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 26px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -1px;
  white-space: nowrap;
}
.header-logo span { color: var(--primary); }
.nav-link {
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 6px 2px;
}
.nav-link:after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--primary); }
.nav-link.active:after, .nav-link:hover:after { width: 100%; }
.header-cta { margin-left: 8px; }
.header-cta-mobile { display: none; }
.mobile-menu { display: none; }

/* Article Hero */
.article-hero {
  position: relative;
  padding: 48px 0 44px;
  background: linear-gradient(120deg, #EDF3FC 0%, #FFFFFF 80%);
  border-bottom: 1px solid var(--border);
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.webp') no-repeat center/cover;
  opacity: .12;
}
.article-hero .container { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 22px;
}
.breadcrumb a { color: var(--muted); transition: var(--transition); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .separator { color: #B8C4D4; }
.breadcrumb .current { color: var(--primary); font-weight: 600; max-width: 420px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.article-heading { max-width: 900px; }
.article-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 18px;
}
.article-heading h1 { font-size: 36px; line-height: 1.35; font-weight: 800; color: var(--text); margin-bottom: 18px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 20px; color: var(--muted); font-size: 14px; }
.article-meta span { display: inline-flex; align-items: center; gap: 6px; }
.article-meta i { color: var(--primary); }

/* Article Main */
.article-main { padding: 48px 0 88px; }
.article-box {
  background: #fff;
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 32px;
  max-width: 960px;
  margin: 0 auto;
}
.article-cover { border-radius: var(--radius); overflow: hidden; margin-bottom: 32px; }
.article-cover img { width: 100%; height: auto; }
.article-content { max-width: 780px; margin: 0 auto; }
.article-content p, .article-content li { font-size: 16px; line-height: 1.85; color: #3A4557; }
.article-content p { margin-bottom: 24px; }
.article-content h2 {
  font-size: 26px;
  font-weight: 800;
  margin: 40px 0 16px;
  color: var(--text);
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  border-radius: 2px;
}
.article-content h3 { font-size: 22px; font-weight: 700; margin: 32px 0 14px; color: var(--text); }
.article-content h4 { font-size: 19px; font-weight: 700; margin: 24px 0 12px; color: var(--text); }
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 4px; }
.article-content a:hover { color: var(--primary-dark); }
.article-content blockquote {
  margin: 24px 0;
  padding: 18px 22px;
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: #3A4557;
}
.article-content ul, .article-content ol { margin: 0 0 24px; padding-left: 24px; }
.article-content li { margin-bottom: 10px; }
.article-content ul li { list-style: disc; }
.article-content ol li { list-style: decimal; }
.article-content table { width: 100%; margin: 28px 0; border-collapse: collapse; border-radius: var(--radius-sm); overflow: hidden; font-size: 15px; }
.article-content table th { background: var(--primary-light); color: var(--text); font-weight: 700; padding: 12px 16px; text-align: left; border: 1px solid var(--border); }
.article-content table td { padding: 12px 16px; border: 1px solid var(--border); }
.article-content table tr:nth-child(even) td { background: #F9FBFD; }
.article-content img { border-radius: var(--radius); margin: 24px 0; width: 100%; }
.article-content hr { height: 1px; border: 0; background: var(--border); margin: 32px 0; }
.article-content pre { background: #1E2E4A; color: #E8F0FA; padding: 20px; border-radius: var(--radius-sm); overflow-x: auto; margin: 24px 0; }
.article-content code { background: #F0F4FA; padding: 2px 6px; border-radius: 4px; font-size: 14px; color: #34495E; }
.article-content pre code { background: transparent; padding: 0; color: inherit; }
.article-end {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.back-link { color: var(--primary); font-weight: 600; font-size: 15px; display: inline-flex; align-items: center; gap: 6px; }
.back-link:hover { color: var(--primary-dark); }

/* Missing */
.missing-card {
  background: #fff;
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 64px 32px;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.missing-icon {
  width: 76px;
  height: 76px;
  margin: 0 auto 24px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 32px;
}
.missing-card h2 { font-size: 28px; font-weight: 800; margin-bottom: 16px; }
.missing-card p { color: var(--muted); font-size: 16px; margin: 0 0 28px; }

/* Related */
.related-section { padding: 0 0 88px; position: relative; }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; }
.section-head h2 { font-size: 30px; font-weight: 800; color: var(--text); position: relative; }
.more-link { color: var(--primary); font-weight: 600; font-size: 15px; display: inline-flex; align-items: center; gap: 6px; }
.more-link:hover { color: var(--primary-dark); }
.related-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  height: 100%;
  color: var(--text);
  margin-bottom: 28px;
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); color: var(--text); }
.related-thumb { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.related-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.related-card:hover .related-thumb img { transform: scale(1.05); }
.related-cat {
  position: absolute;
  left: 14px;
  top: 14px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  z-index: 1;
}
.related-info { padding: 18px 20px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.related-date { font-size: 13px; color: var(--muted); }
.related-date i { margin-right: 4px; }
.related-info h3 { font-size: 18px; font-weight: 700; color: var(--text); line-height: 1.4; margin-bottom: 6px; }
.related-info p { color: var(--muted); font-size: 14px; line-height: 1.7; }

/* CTA */
.cta-section { padding: 0 0 88px; }
.cta-box {
  position: relative;
  background: var(--primary);
  border-radius: 24px;
  padding: 48px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  overflow: hidden;
}
.cta-box::after {
  content: '';
  position: absolute;
  right: -60px;
  top: -60px;
  width: 320px;
  height: 320px;
  background: url('/assets/images/backpic/back-2.webp') no-repeat center/cover;
  opacity: .18;
  border-radius: 50%;
}
.cta-box > * { position: relative; z-index: 1; }
.cta-content h2 { color: #fff; font-size: 26px; font-weight: 800; margin-bottom: 10px; }
.cta-content p { color: rgba(255,255,255,.88); font-size: 15px; max-width: 620px; }
.cta-actions { display: flex; gap: 14px; flex-shrink: 0; }

/* Footer */
.site-footer { background: var(--footer-bg); color: #A9B7C9; padding: 64px 0 0; }
.footer-top { display: grid; grid-template-columns: 1.4fr 2fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-logo { font-size: 24px; font-weight: 800; color: #fff; letter-spacing: -0.5px; }
.footer-logo span { color: #7BA7F0; }
.footer-brand-desc { margin: 18px 0 22px; color: #8296B0; font-size: 14px; line-height: 1.8; max-width: 400px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255,255,255,.08);
  color: #C6D2E2;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
.footer-links-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-links-grid h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 16px; }
.footer-links-grid ul { list-style: none; }
.footer-links-grid li { margin-bottom: 10px; }
.footer-links-grid a, .footer-links-grid span { color: #8296B0; font-size: 14px; transition: var(--transition); }
.footer-links-grid a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; padding: 20px 0 24px; font-size: 13px; color: #61758D; }
.footer-bottom a { color: #8296B0; transition: var(--transition); }
.footer-bottom a:hover { color: var(--accent); }

/* Responsive */
@media (max-width: 1023.98px) {
  .hamburger { display: inline-flex; }
  .nav-left, .nav-right { display: none; }
  .header-cta-mobile { display: inline-flex; }
  .header-inner { min-height: 64px; }
  .mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-top: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    z-index: 999;
  }
  .mobile-menu.open { display: block; }
  .mobile-nav { padding: 16px 24px 24px; display: flex; flex-direction: column; gap: 8px; }
  .mobile-nav a:not(.btn) {
    display: block;
    padding: 12px 4px;
    font-size: 16px;
    color: var(--text);
    border-bottom: 1px solid var(--bg);
    font-weight: 500;
    transition: var(--transition);
  }
  .mobile-nav a.active { color: var(--primary); }
  .mobile-nav .btn { margin-top: 12px; }
}
@media (max-width: 767.98px) {
  .article-hero { padding: 32px 0; }
  .article-heading h1 { font-size: 26px; }
  .article-main { padding: 24px 0 56px; }
  .article-box { padding: 20px; border-radius: var(--radius); }
  .article-content h2 { font-size: 21px; }
  .article-content h3 { font-size: 19px; }
  .cta-section { padding: 0 0 56px; }
  .cta-box { flex-direction: column; padding: 36px 24px; text-align: center; }
  .cta-actions { flex-direction: column; width: 100%; }
  .cta-actions .btn { width: 100%; }
  .cta-content p { margin: 0 auto; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-links-grid { grid-template-columns: 1fr 1fr; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 10px; }
  .section-head h2 { font-size: 24px; }
  .related-section { padding: 0 0 56px; }
}
@media (max-width: 519.98px) {
  .container { padding: 0 16px; }
  .header-logo { font-size: 22px; }
  .article-meta { gap: 12px 16px; font-size: 13px; }
  .article-end { flex-direction: column; align-items: flex-start; }
  .footer-links-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .related-info h3 { font-size: 17px; }
  .cta-content h2 { font-size: 22px; }
}

/* roulang page: category2 */
:root {
  --primary: #2E6FE0;
  --primary-dark: #1E5BC0;
  --primary-light: #EAF1FC;
  --accent: #FF7A1A;
  --accent-dark: #E86408;
  --bg: #F5F8FC;
  --card: #FFFFFF;
  --text: #243040;
  --muted: #6B7B8E;
  --footer-bg: #16233A;
  --border: #E3EAF2;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 18px rgba(23, 44, 81, .08);
  --shadow-hover: 0 12px 32px rgba(23, 44, 81, .13);
  --space: 88px;
  --space-mobile: 56px;
  --transition: all .3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  margin: 0;
  padding: 0;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--primary-dark);
}

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

ul, ol {
  padding-left: 1.25rem;
}

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

.section {
  padding: var(--space) 0;
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  margin: 0 0 12px;
  color: var(--text);
}
.section-head p {
  font-size: 16px;
  color: var(--muted);
  margin: 0;
}

/* ======= Header ======= */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 999;
  transition: box-shadow .3s ease;
}
.site-header.scrolled {
  box-shadow: 0 6px 20px rgba(23,44,81,.08);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  height: 74px;
  position: relative;
}
.header-logo {
  font-size: 26px;
  font-weight: 800;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: .5px;
  display: flex;
  align-items: center;
}
.header-logo span {
  color: var(--primary);
  margin-right: 2px;
}
.header-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  position: relative;
  transition: var(--transition);
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.nav-link.active {
  color: var(--primary);
  font-weight: 700;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.nav-left {
  justify-content: flex-end;
}
.nav-right {
  justify-content: flex-start;
}
.nav-left .nav-link {
  text-align: right;
}
.nav-right .nav-link {
  text-align: left;
}
.header-cta {
  margin-left: 10px;
}
.header-cta-mobile {
  display: none;
}

.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: var(--transition);
}
.hamburger:hover {
  background: var(--primary-light);
}
.hamburger span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  margin: 5px 0;
  transition: var(--transition);
}
.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

.mobile-menu {
  display: none;
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 16px 24px;
  box-shadow: 0 20px 30px rgba(23,44,81,.06);
}
.mobile-menu.open {
  display: block;
}
.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mobile-nav a {
  padding: 14px 16px;
  font-size: 16px;
  color: var(--text);
  border-radius: 8px;
  font-weight: 500;
}
.mobile-nav a.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 700;
}
.mobile-nav a.btn {
  margin-top: 8px;
  text-align: center;
}

/* ======= Buttons ======= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.5;
  text-decoration: none;
}
.btn i {
  font-size: 14px;
  transition: transform .3s ease;
}
.btn:hover i {
  transform: translateX(4px);
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(46,111,224,.25);
}
.btn-accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-accent:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255,122,26,.3);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-color: var(--primary-dark);
}
.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}
.btn-xs {
  padding: 6px 14px;
  font-size: 13px;
}
.btn-block {
  width: 100%;
  display: block;
}

/* ======= Category Hero ======= */
.category-hero {
  background: linear-gradient(135deg, rgba(46,111,224,.92), rgba(30,91,192,.82)), url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  padding: 68px 0;
  color: #fff;
  position: relative;
}
.category-hero-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: nowrap;
}
.category-hero h1 {
  font-size: 40px;
  font-weight: 800;
  margin: 12px 0 0;
  line-height: 1.3;
  color: #fff;
}
.hero-tag {
  display: inline-block;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.35);
  padding: 5px 16px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .5px;
  backdrop-filter: blur(4px);
}
.hero-tag i {
  margin-right: 6px;
  color: var(--accent);
}
.hero-desc {
  max-width: 420px;
  font-size: 16px;
  line-height: 1.9;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  padding: 24px 28px;
  border-radius: var(--radius);
  backdrop-filter: blur(4px);
}
.hero-desc p {
  margin: 0;
  color: #EAF1FC;
}

/* ======= Timeline Section ======= */
.timeline-section {
  background: var(--bg);
}
.timeline-layout {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 56px;
  align-items: start;
}
.timeline-col {
  position: relative;
  padding-left: 36px;
}
.timeline-col::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), rgba(46,111,224,.1));
  border-radius: 2px;
}
.timeline-item {
  position: relative;
  margin-bottom: 28px;
}
.tl-marker {
  position: absolute;
  left: -36px;
  top: 24px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--primary);
  z-index: 1;
}
.tl-card {
  background: #fff;
  border-radius: 12px;
  padding: 22px 26px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-left: 4px solid var(--primary);
}
.tl-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
  border-left-color: var(--accent);
}
.tl-date {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 10px;
  letter-spacing: .3px;
}
.tl-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text);
}
.tl-card p {
  margin: 0;
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.8;
}
.timeline-visual {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  position: sticky;
  top: 96px;
}
.timeline-visual img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}
.timeline-visual .visual-caption {
  padding: 24px 28px;
}
.timeline-visual .visual-caption p {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.85;
}
.timeline-visual .visual-caption h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--text);
}

/* ======= Coverage Section ======= */
.coverage-section {
  background: #fff;
}
.coverage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.coverage-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.coverage-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
  background: #fff;
}
.coverage-icon {
  width: 52px;
  height: 52px;
  background: var(--primary-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 18px;
  transition: var(--transition);
}
.coverage-card:hover .coverage-icon {
  background: var(--primary);
  color: #fff;
}
.coverage-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--text);
}
.coverage-card p {
  font-size: 14.5px;
  color: var(--muted);
  margin: 0 0 16px;
  line-height: 1.8;
}
.coverage-tag {
  margin-top: auto;
  display: inline-block;
  background: rgba(46,111,224,.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 20px;
}
.coverage-tag i {
  margin-right: 4px;
  font-size: 12px;
}

/* ======= Stats Section ======= */
.stats-section {
  padding: var(--space) 0;
  background: var(--bg);
}
.stats-panel {
  background: var(--footer-bg);
  border-radius: calc(var(--radius) + 4px);
  padding: 56px 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.stats-panel::before {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  width: 320px;
  height: 100%;
  background: url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  opacity: .1;
}
.stat-item {
  position: relative;
  z-index: 1;
  padding: 8px 0;
}
.stat-num {
  display: block;
  font-size: 44px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 8px;
}
.stat-item span:last-child {
  color: #C9D6E8;
  font-size: 15px;
  letter-spacing: .5px;
}

/* ======= FAQ Section ======= */
.faq-section {
  background: #fff;
}
.faq-accordion {
  max-width: 820px;
  margin: 0 auto;
  list-style: none !important;
  background: transparent !important;
  border: 0 !important;
}
.faq-accordion .accordion-item {
  background: var(--bg);
  border-radius: 14px;
  border-left: 4px solid var(--primary);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
  list-style: none !important;
}
.faq-accordion .accordion-item:hover {
  background: var(--primary-light);
}
.faq-accordion .accordion-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  padding: 20px 28px;
  border-bottom: 0 !important;
  position: relative;
  display: block;
  background: transparent !important;
  line-height: 1.6;
  transition: var(--transition);
}
.faq-accordion .accordion-title::after {
  content: '\002B';
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 26px;
  font-weight: 300;
  color: var(--primary);
  transition: transform .35s ease;
  line-height: 1;
}
.faq-accordion .accordion-item.is-active .accordion-title::after {
  transform: translateY(-50%) rotate(45deg);
}
.faq-accordion .accordion-content {
  background: transparent !important;
  padding: 4px 28px 20px !important;
  border-top: 0 !important;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
}
.faq-accordion .accordion-content p {
  margin: 0 0 8px;
}
.faq-note {
  text-align: center;
  margin-top: 32px;
}
.faq-note a {
  font-weight: 600;
}

/* ======= CTA Light ======= */
.cta-light {
  padding: 64px 0 88px;
  background: var(--bg);
}
.cta-light-box {
  max-width: 860px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--radius);
  padding: 40px 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  flex-wrap: wrap;
}
.cta-light-box h3 {
  font-size: 22px;
  font-weight: 800;
  margin: 0 0 6px;
  color: var(--text);
}
.cta-light-box p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}
.cta-light-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-phone {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}
.cta-phone i {
  color: var(--accent);
  margin-right: 6px;
}

/* ======= Footer ======= */
.site-footer {
  background: var(--footer-bg);
  color: #A6B3C6;
  padding: 64px 0 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-logo {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
}
.footer-logo span {
  color: var(--primary);
  margin-right: 2px;
}
.footer-brand-desc {
  font-size: 14.5px;
  line-height: 1.85;
  color: #8FA0B5;
  margin-bottom: 20px;
  max-width: 320px;
}
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,.08);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #C9D6E8;
  transition: var(--transition);
}
.footer-social a:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-3px);
}
.footer-links-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer-links-grid h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 18px;
}
.footer-links-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links-grid ul li {
  margin-bottom: 10px;
}
.footer-links-grid a {
  color: #8FA0B5;
  font-size: 14px;
  line-height: 1.7;
}
.footer-links-grid a:hover {
  color: var(--accent);
}
.footer-links-grid span {
  color: #8FA0B5;
  font-size: 14px;
  line-height: 1.7;
}
.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13.5px;
  color: #8FA0B5;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom a {
  color: #8FA0B5;
}
.footer-bottom a:hover {
  color: var(--accent);
}
.beian {
  color: #7A8899;
}

/* ======= Media Queries ======= */
@media (max-width: 1024px) {
  :root {
    --space: 64px;
  }
  .header-nav {
    display: none;
  }
  .hamburger {
    display: block;
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
  }
  .header-cta-mobile {
    display: block;
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
  }
  .header-cta-mobile .btn {
    padding: 6px 14px;
    font-size: 13px;
  }
  .header-logo {
    font-size: 22px;
  }
  .header-inner {
    height: 64px;
  }
  .category-hero {
    padding: 48px 0;
  }
  .category-hero h1 {
    font-size: 32px;
  }
  .category-hero-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
  .hero-desc {
    max-width: 100%;
    padding: 20px 24px;
  }
  .timeline-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .timeline-visual {
    position: static;
    max-width: 560px;
  }
  .coverage-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-panel {
    grid-template-columns: repeat(2, 1fr);
    padding: 40px 32px;
    gap: 24px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 640px) {
  :root {
    --space: 48px;
  }
  body {
    font-size: 15px;
  }
  .container {
    padding: 0 16px;
  }
  .section {
    padding: var(--space) 0;
  }
  .section-head {
    margin-bottom: 32px;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .category-hero {
    padding: 40px 0;
  }
  .category-hero h1 {
    font-size: 27px;
  }
  .hero-desc {
    padding: 16px 20px;
    font-size: 14.5px;
  }
  .hero-tag {
    font-size: 12px;
    padding: 4px 12px;
  }
  .timeline-col {
    padding-left: 28px;
  }
  .tl-marker {
    left: -28px;
    width: 12px;
    height: 12px;
  }
  .tl-card {
    padding: 18px 20px;
  }
  .tl-card h3 {
    font-size: 16.5px;
  }
  .tl-card p {
    font-size: 14px;
  }
  .coverage-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .coverage-card {
    padding: 24px 20px;
  }
  .stats-panel {
    padding: 32px 20px;
    gap: 20px;
    grid-template-columns: 1fr 1fr;
  }
  .stat-num {
    font-size: 36px;
  }
  .faq-accordion .accordion-title {
    padding: 16px 20px;
    font-size: 15px;
  }
  .faq-accordion .accordion-title::after {
    right: 18px;
  }
  .faq-accordion .accordion-content {
    padding: 4px 20px 16px !important;
  }
  .cta-light {
    padding: 48px 0 64px;
  }
  .cta-light-box {
    padding: 28px 20px;
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-light-actions {
    width: 100%;
  }
  .cta-light-actions .btn {
    flex: 1;
  }
  .footer-top {
    padding-bottom: 32px;
  }
  .footer-links-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .mobile-menu {
    padding: 12px 16px;
  }
}