/* roulang page: index */
:root{
  --primary:#2456e6;
  --primary-deep:#173fae;
  --primary-soft:#eaf0ff;
  --accent:#0fb8c9;
  --accent-soft:#e5fafb;
  --ink:#0e1930;
  --text:#34445e;
  --text-weak:#7c8ba6;
  --line:#e4e9f2;
  --bg:#f6f8fc;
  --white:#fff;
  --dark:#0b1526;
  --dark-2:#111f36;
  --radius:14px;
  --radius-lg:22px;
  --shadow-sm:0 4px 14px rgba(13,30,75,.06);
  --shadow:0 12px 32px rgba(13,30,75,.09);
  --shadow-lg:0 24px 60px rgba(13,30,75,.16);
  --container:1180px;
  --transition:.25s ease;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}
input,textarea{font-family:inherit}
ul,ol{list-style:none}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:90px 0;position:relative}
.section-bg{background:var(--white)}
.section-head{max-width:680px;margin:0 auto 52px;text-align:center}
.section-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;border-radius:100px;
  background:var(--primary-soft);color:var(--primary);
  font-size:13px;font-weight:600;letter-spacing:.5px;
  margin-bottom:16px;
}
.section-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}
.section-title{
  font-size:34px;line-height:1.3;color:var(--ink);
  font-weight:800;letter-spacing:-.3px;margin-bottom:14px;
}
.section-sub{color:var(--text-weak);font-size:16px;line-height:1.8}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 30px;border-radius:100px;
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:all var(--transition);line-height:1.4;
}
.btn:focus-visible{outline:3px solid rgba(36,86,230,.35);outline-offset:2px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 22px rgba(36,86,230,.28)}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-2px);box-shadow:0 12px 28px rgba(36,86,230,.36)}
.btn-primary:active{transform:translateY(0)}
.btn-light{background:#fff;color:var(--ink);box-shadow:0 8px 24px rgba(10,20,40,.16)}
.btn-light:hover{background:var(--primary-soft);transform:translateY(-2px)}
.btn-outline{border-color:rgba(255,255,255,.7);color:#fff;background:rgba(255,255,255,.08);backdrop-filter:blur(6px)}
.btn-outline:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
.btn-sm{padding:9px 20px;font-size:14px}
.tag{
  display:inline-flex;align-items:center;gap:5px;
  padding:4px 12px;border-radius:100px;font-size:12px;font-weight:600;
  background:var(--accent-soft);color:#0c8795;
}
.tag-primary{background:var(--primary-soft);color:var(--primary)}
.tag-dark{background:rgba(255,255,255,.12);color:#fff}
/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:99;background:#fff;box-shadow:0 1px 0 var(--line),0 10px 30px rgba(13,30,75,.04)}
.header-brand{background:#fff;border-bottom:1px solid var(--line)}
.header-brand-inner{display:flex;align-items:center;justify-content:space-between;height:74px;gap:20px}
.logo{display:flex;align-items:center;gap:12px;min-width:0}
.logo-mark{
  width:42px;height:42px;border-radius:12px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary) 0%,var(--accent) 100%);
  color:#fff;font-size:20px;font-weight:800;
  box-shadow:0 6px 16px rgba(36,86,230,.32);
}
.logo-text{display:flex;flex-direction:column;line-height:1.25}
.logo-text strong{font-size:20px;color:var(--ink);font-weight:800;letter-spacing:.4px;white-space:nowrap}
.logo-text small{font-size:11px;color:var(--text-weak);letter-spacing:1.5px;white-space:nowrap}
.header-actions{display:flex;align-items:center;gap:14px}
.header-search{display:flex;align-items:center;background:var(--bg);border:1px solid var(--line);border-radius:100px;padding:0 6px 0 18px;height:44px;transition:border-color var(--transition)}
.header-search:focus-within{border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px rgba(36,86,230,.1)}
.header-search input{border:0;background:transparent;outline:0;width:200px;font-size:14px;color:var(--ink)}
.header-search button{
  width:34px;height:34px;border:0;border-radius:50%;background:var(--primary);color:#fff;font-size:14px;
  transition:background var(--transition);display:inline-flex;align-items:center;justify-content:center;
}
.header-search button:hover{background:var(--primary-deep)}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);font-size:18px;align-items:center;justify-content:center;transition:all var(--transition)}
.nav-toggle:hover{border-color:var(--primary);color:var(--primary)}
/* channel nav */
.channel-nav{background:#fff;position:relative;z-index:98}
.channel-nav-inner{display:flex;align-items:center;gap:4px;min-height:56px;overflow-x:auto;scrollbar-width:none}
.channel-nav-inner::-webkit-scrollbar{display:none}
.channel-link{
  position:relative;padding:10px 20px;border-radius:10px;
  font-size:15px;font-weight:600;color:var(--text);
  transition:all var(--transition);white-space:nowrap;
}
.channel-link:hover{color:var(--primary);background:var(--primary-soft)}
.channel-link.active{color:var(--primary);background:var(--primary-soft)}
.channel-link.active::after{
  content:"";position:absolute;left:20px;right:20px;bottom:-2px;height:3px;
  border-radius:3px;background:var(--primary);
}
.channel-live{
  margin-left:auto;display:inline-flex;align-items:center;gap:7px;
  font-size:12px;font-weight:600;color:var(--text-weak);white-space:nowrap;
  padding:6px 14px;background:var(--bg);border:1px solid var(--line);border-radius:100px;
}
.channel-live i{color:#22c55e;font-size:9px;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
/* ===== Hero ===== */
.hero{
  position:relative;padding:110px 0 120px;overflow:hidden;
  background:linear-gradient(120deg,rgba(9,14,30,.94) 20%,rgba(15,30,60,.78) 60%,rgba(12,45,75,.7) 100%),url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.hero::before{
  content:"";position:absolute;top:-120px;right:-80px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(15,184,201,.28),transparent 65%);pointer-events:none;
}
.hero::after{
  content:"";position:absolute;bottom:-160px;left:-60px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(36,86,230,.3),transparent 65%);pointer-events:none;
}
.hero-inner{position:relative;z-index:2;max-width:860px}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(8px);border-radius:100px;
  padding:8px 18px;color:#dbe7ff;font-size:14px;font-weight:500;margin-bottom:28px;
}
.hero-badge i{color:var(--accent)}
.hero h1{
  font-size:58px;line-height:1.18;color:#fff;font-weight:900;letter-spacing:-1px;margin-bottom:22px;
}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#82b4ff,#30d1e0);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-desc{font-size:17px;line-height:1.9;color:rgba(230,238,255,.88);max-width:620px;margin-bottom:36px}
.hero-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:56px}
.hero-actions .btn i{font-size:14px}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  border-top:1px solid rgba(255,255,255,.12);padding-top:36px;max-width:720px;
}
.stat-item .stat-num{font-size:32px;font-weight:800;color:#fff;letter-spacing:-.5px}
.stat-item .stat-num small{font-size:16px;color:var(--accent);font-weight:700;margin-left:2px}
.stat-item .stat-label{font-size:13px;color:rgba(210,222,245,.72);margin-top:4px}
/* ===== Features ===== */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:32px 26px;transition:all var(--transition);position:relative;overflow:hidden;
}
.feature-card::after{
  content:"";position:absolute;right:-30px;top:-30px;width:100px;height:100px;border-radius:50%;
  background:var(--primary-soft);opacity:0;transition:opacity var(--transition);
}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.feature-card:hover::after{opacity:1}
.feature-icon{
  width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary);font-size:24px;margin-bottom:20px;position:relative;z-index:1;
}
.feature-card:nth-child(2) .feature-icon{background:var(--accent-soft);color:#0c8795}
.feature-card:nth-child(3) .feature-icon{background:linear-gradient(135deg,#fff7e8,#ffe6c0);color:#e08700}
.feature-card:nth-child(4) .feature-icon{background:linear-gradient(135deg,#eafaf0,#d0f4df);color:#16a34a}
.feature-card h3{font-size:19px;color:var(--ink);font-weight:700;margin-bottom:10px;position:relative;z-index:1}
.feature-card p{font-size:14px;color:var(--text-weak);line-height:1.75;position:relative;z-index:1}
/* ===== Stats Band ===== */
.stats-band{
  background:linear-gradient(135deg,#0e1d36 0%,#0c2b4d 100%),url('/assets/images/backpic/back-2.png') center/cover;
  padding:80px 0;position:relative;overflow:hidden;
}
.stats-band::before{
  content:"";position:absolute;left:10%;top:-110px;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(36,86,230,.4),transparent 70%);
}
.stats-band-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:36px;text-align:center;position:relative;z-index:2}
.stats-band .stat-num{font-size:44px;font-weight:900;color:#fff;letter-spacing:-1px}
.stats-band .stat-num small{font-size:20px;color:var(--accent)}
.stats-band .stat-label{color:rgba(214,226,248,.78);font-size:14px;margin-top:6px}
/* ===== Category cards ===== */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.cat-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  transition:all var(--transition);display:flex;flex-direction:column;
}
.cat-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent}
.cat-cover{position:relative;aspect-ratio:16/9;overflow:hidden}
.cat-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.cat-card:hover .cat-cover img{transform:scale(1.06)}
.cat-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(9,15,28,.55))}
.cat-cover .cat-mask{position:absolute;left:18px;bottom:16px;z-index:2;display:flex;gap:8px}
.cat-body{padding:26px;display:flex;flex-direction:column;flex:1}
.cat-body h3{font-size:21px;color:var(--ink);font-weight:800;margin-bottom:12px}
.cat-body p{font-size:14px;color:var(--text-weak);line-height:1.8;flex:1;margin-bottom:18px}
.cat-more{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--primary);
  transition:gap var(--transition);
}
.cat-more i{font-size:12px}
.cat-card:hover .cat-more{gap:13px}
/* ===== News ===== */
.news-wrap{display:grid;grid-template-columns:1fr 340px;gap:36px;align-items:start}
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;display:flex;flex-direction:column;transition:all var(--transition);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--primary)}
.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.news-date{font-size:12px;color:var(--text-weak);margin-left:auto;white-space:nowrap}
.news-title{font-size:17px;line-height:1.55;color:var(--ink);font-weight:700;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-desc{font-size:13px;color:var(--text-weak);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:16px;flex:1}
.news-go{font-size:13px;font-weight:700;color:var(--primary);display:inline-flex;align-items:center;gap:6px;transition:gap var(--transition)}
.news-card:hover .news-go{gap:11px}
.empty-tip{
  grid-column:1/-1;background:#fff;border:1px dashed var(--line);border-radius:var(--radius-lg);
  padding:56px 24px;text-align:center;color:var(--text-weak);font-size:15px;
}
.side-stack{display:flex;flex-direction:column;gap:24px}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;
}
.side-card h3{font-size:17px;color:var(--ink);font-weight:800;margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:8px}
.side-card h3 i{color:var(--primary);font-size:15px}
.topic-cloud{display:flex;flex-wrap:wrap;gap:10px}
.topic-tag{
  padding:7px 16px;border-radius:100px;background:var(--bg);border:1px solid var(--line);
  font-size:13px;font-weight:600;color:var(--text);transition:all var(--transition);
}
.topic-tag:hover{background:var(--primary);border-color:var(--primary);color:#fff;transform:translateY(-2px)}
.entry-list{display:flex;flex-direction:column;gap:10px}
.entry-list a{
  display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:12px;
  background:var(--bg);border:1px solid transparent;font-size:14px;font-weight:600;color:var(--text);
  transition:all var(--transition);
}
.entry-list a i{color:var(--accent);font-size:13px;width:18px}
.entry-list a:hover{background:var(--primary-soft);color:var(--primary);border-color:rgba(36,86,230,.2);transform:translateX(4px)}
/* ===== Showcase ===== */
.showcase-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.showcase-media{position:relative;border-radius:28px;overflow:hidden;box-shadow:var(--shadow-lg)}
.showcase-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.showcase-media::before{content:"";position:absolute;inset:0;background:linear-gradient(200deg,rgba(36,86,230,.16),transparent 60%);z-index:1}
.showcase-float{
  position:absolute;left:20px;bottom:20px;z-index:2;
  background:rgba(255,255,255,.94);backdrop-filter:blur(12px);
  border-radius:16px;padding:14px 20px;box-shadow:var(--shadow);display:flex;align-items:center;gap:12px;
}
.showcase-float i{width:38px;height:38px;border-radius:10px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:16px}
.showcase-float b{font-size:15px;color:var(--ink);display:block;line-height:1.3}
.showcase-float span{font-size:12px;color:var(--text-weak)}
.showcase-copy h2{font-size:32px;line-height:1.3;color:var(--ink);font-weight:800;margin-bottom:18px}
.showcase-copy p{color:var(--text-weak);line-height:1.85;margin-bottom:24px}
.check-list{display:flex;flex-direction:column;gap:14px;margin-bottom:32px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text);font-weight:500}
.check-list i{width:22px;height:22px;border-radius:50%;background:var(--accent-soft);color:#0c8795;font-size:11px;display:flex;align-items:center;justify-content:center;margin-top:3px;flex:0 0 auto}
/* ===== Steps ===== */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:32px 24px;transition:all var(--transition);overflow:hidden;
}
.step-card::before{
  counter-increment:step;content:"0" counter(step);
  position:absolute;top:6px;right:16px;font-size:62px;font-weight:900;color:var(--primary-soft);line-height:1;z-index:0;
}
.step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(36,86,230,.25)}
.step-icon{width:50px;height:50px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:18px;position:relative;z-index:1;box-shadow:0 8px 18px rgba(36,86,230,.25)}
.step-card h3{font-size:18px;color:var(--ink);font-weight:700;margin-bottom:10px;position:relative;z-index:1}
.step-card p{font-size:13px;color:var(--text-weak);line-height:1.75;position:relative;z-index:1}
/* ===== FAQ ===== */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  transition:all var(--transition);overflow:hidden;
}
.faq-item:hover{border-color:rgba(36,86,230,.3);box-shadow:var(--shadow-sm)}
.faq-item[open]{box-shadow:var(--shadow);border-color:rgba(36,86,230,.3)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:22px 26px;
  display:flex;align-items:center;gap:14px;font-size:16px;font-weight:700;color:var(--ink);
  transition:color var(--transition);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--primary)}
.faq-item summary .faq-arrow{margin-left:auto;width:30px;height:30px;border-radius:50%;background:var(--bg);display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--text-weak);transition:all var(--transition);flex:0 0 auto}
.faq-item[open] summary .faq-arrow{background:var(--primary);color:#fff;transform:rotate(180deg)}
.faq-item[open] summary{color:var(--primary)}
.faq-item .faq-body{padding:0 26px 24px;color:var(--text-weak);font-size:14px;line-height:1.85;border-top:1px dashed var(--line);margin:0 26px 0;padding:18px 0 24px}
/* ===== CTA ===== */
.cta-panel{
  position:relative;border-radius:30px;overflow:hidden;
  background:linear-gradient(120deg,#0d1c35 0%,#123258 55%,#0c4a57 100%),url('/assets/images/backpic/back-3.png') right/cover no-repeat;
  padding:80px 70px;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
}
.cta-panel::before{content:"";position:absolute;right:-50px;top:-50px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(15,184,201,.35),transparent 70%)}
.cta-copy{position:relative;z-index:2;max-width:560px}
.cta-copy .section-tag{background:rgba(255,255,255,.1);color:#96c0ff;border:1px solid rgba(255,255,255,.15)}
.cta-copy h2{font-size:32px;color:#fff;font-weight:800;line-height:1.35;margin-bottom:14px}
.cta-copy p{color:rgba(222,232,248,.85);font-size:15px;line-height:1.85}
.cta-actions{position:relative;z-index:2;display:flex;flex-direction:column;gap:14px;align-items:flex-start}
/* ===== Footer ===== */
.site-footer{background:var(--dark);padding:70px 0 0;color:rgba(214,226,248,.72)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;padding-bottom:50px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand .logo .logo-text strong{color:#fff}
.footer-brand .logo .logo-text small{color:rgba(214,226,248,.55)}
.footer-desc{margin:20px 0 20px;font-size:14px;line-height:1.85;color:rgba(214,226,248,.66);max-width:360px}
.footer-domain{
  display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:100px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  font-size:13px;color:rgba(214,226,248,.8);
}
.footer-domain i{color:var(--accent)}
.footer-col h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:20px;padding-bottom:12px;position:relative}
.footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:28px;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:rgba(214,226,248,.68);transition:all var(--transition)}
.footer-col a:hover{color:#fff;transform:translateX(4px);display:inline-block}
.footer-bottom{
  padding:24px 0;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:rgba(214,226,248,.5);
}
.footer-bottom a{color:rgba(214,226,248,.62)}
.footer-bottom a:hover{color:#fff}
/* ===== Responsive ===== */
@media (max-width:1024px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .news-wrap{grid-template-columns:1fr}
  .showcase-grid{grid-template-columns:1fr;gap:40px}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .stats-band-inner{grid-template-columns:repeat(2,1fr);gap:28px}
  .cta-panel{padding:60px 48px}
  .header-search input{width:140px}
  .hero h1{font-size:46px}
}
@media (max-width:768px){
  .header-search{display:none}
  .nav-toggle{display:inline-flex}
  .channel-nav{display:none;border-top:0}
  .site-header.nav-open .channel-nav{display:block;position:absolute;left:0;right:0;top:100%;background:#fff;box-shadow:0 20px 40px rgba(13,30,75,.12)}
  .site-header.nav-open .channel-nav-inner{flex-direction:column;align-items:stretch;padding:12px 0;overflow:visible}
  .site-header.nav-open .channel-link{text-align:left;border-radius:10px}
  .site-header.nav-open .channel-link.active::after{display:none}
  .channel-live{margin-left:0;justify-content:center}
  .hero{padding:80px 0 90px}
  .hero h1{font-size:38px}
  .hero-actions .btn{flex:1;justify-content:center}
  .section{padding:66px 0}
  .section-title{font-size:28px}
  .cat-grid{grid-template-columns:1fr 1fr}
  .news-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta-panel{padding:48px 30px;flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%;justify-content:center}
  .stats-band .stat-num{font-size:34px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .header-brand-inner{height:64px}
  .logo-text small{display:none}
  .logo-text strong{font-size:18px}
  .header-actions{gap:10px}
  .header-cta{display:none}
  .hero{padding:64px 0 72px}
  .hero h1{font-size:31px}
  .hero-desc{font-size:15px}
  .hero-actions .btn{width:100%}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:18px}
  .stat-item .stat-num{font-size:26px}
  .feature-grid{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr}
  .stats-band-inner{grid-template-columns:repeat(2,1fr);gap:24px}
  .stats-band .stat-num{font-size:28px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center;justify-content:center}
  .section-title{font-size:25px}
  .cta-copy h2{font-size:25px}
  .showcase-float{padding:10px 14px}
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-accent: #06b6d4;
  --color-accent-light: #0891b2;
  --color-dark: #0b1120;
  --color-dark-soft: #111a2e;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-soft: #64748b;
  --color-border: #e2e8f0;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
  --space-section: 80px;
  --container-width: 1200px;
  --font-body: "PingFang SC", "HarmonicOS Sans SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

/* ===== 基础 Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; background: none; border: none; }
input { font-family: inherit; }
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 0; }
.section-alt { background: var(--color-surface); }

/* ===== 导航 Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--color-border);
}
.header-brand { background: var(--color-surface); }
.header-brand-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-mark {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 10px;
  color: #fff;
  font-size: 18px;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text strong { font-size: 19px; font-weight: 700; letter-spacing: 0.02em; color: var(--color-text); }
.logo-text small { font-size: 12px; color: var(--color-text-soft); margin-top: 2px; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.header-search {
  display: flex;
  align-items: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 4px 6px 4px 16px;
  height: 38px;
  width: 240px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.header-search:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
.header-search input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 14px;
  color: var(--color-text);
  outline: none;
}
.header-search input::placeholder { color: var(--color-text-soft); }
.header-search button {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--color-text-soft);
  transition: background-color 0.2s, color 0.2s;
}
.header-search button:hover { background: var(--color-primary); color: #fff; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 14px;
  line-height: 1;
  padding: 12px 20px;
  border: none;
  transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
}
.btn-sm { padding: 9px 16px; font-size: 13px; border-radius: 8px; }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
}
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-1px); box-shadow: 0 6px 22px rgba(37, 99, 235, 0.35); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2); }
.btn-primary:focus-visible,
.channel-link:focus-visible,
.nav-toggle:focus-visible,
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.4);
  outline-offset: 2px;
}
.header-cta { text-decoration: none; }
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  font-size: 18px;
  transition: background-color 0.2s;
}
.nav-toggle:hover { background: var(--color-bg); }
.channel-nav {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}
.channel-nav-inner {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 52px;
  overflow-x: auto;
  scrollbar-width: none;
}
.channel-nav-inner::-webkit-scrollbar { display: none; }
.channel-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-soft);
  white-space: nowrap;
  transition: color 0.2s, background-color 0.2s;
  position: relative;
}
.channel-link:hover { color: var(--color-primary); background: rgba(37, 99, 235, 0.06); }
.channel-link.active { color: var(--color-primary); background: rgba(37, 99, 235, 0.1); }
.channel-link.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 3px;
  border-radius: 2px;
  background: var(--color-primary);
}
.channel-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  font-size: 13px;
  color: var(--color-success);
  white-space: nowrap;
  font-weight: 500;
  padding: 6px 14px;
  background: rgba(16, 185, 129, 0.08);
  border-radius: 999px;
}
.channel-live i { font-size: 8px; animation: pulse-dot 2s ease infinite; }
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ===== 分类 Hero ===== */
.category-hero {
  background: linear-gradient(135deg, rgba(11, 17, 32, 0.92), rgba(30, 58, 138, 0.85)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  padding: 100px 0 88px;
  position: relative;
  overflow: hidden;
}
.category-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.35), transparent 70%);
  border-radius: 50%;
  transform: translate(30%, -30%);
}
.category-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.3), transparent 70%);
  border-radius: 50%;
  transform: translate(-30%, 30%);
}
.hero-inner { position: relative; z-index: 2; max-width: 720px; }
.hero-crumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(6px);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.hero-crumb i { font-size: 11px; }
.category-hero h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}
.category-hero h1 span { color: var(--color-accent); position: relative; }
.category-hero p.hero-lead {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
}
.hero-badges { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
}
.hero-badge i { color: var(--color-accent); }

/* ===== 统计区块 ===== */
.stats-section { position: relative; z-index: 5; margin-top: -44px; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
}
.stat-item {
  padding: 28px 24px;
  text-align: center;
  border-right: 1px solid var(--color-border);
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: 30px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
}
.stat-num i { font-size: 20px; color: var(--color-accent); margin-right: 4px; }
.stat-label { font-size: 13px; color: var(--color-text-soft); margin-top: 6px; }

/* ===== 通用板块标题 ===== */
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}
.section-head .tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--color-primary);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}
.section-head .tag i { font-size: 12px; }
.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}
.section-head p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
}

/* ===== 功能卡片网格 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity 0.25s;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(37, 99, 235, 0.25);
}
.feature-card:hover::before { opacity: 1; }
.feature-card .icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.1));
  color: var(--color-primary);
  font-size: 19px;
  margin-bottom: 20px;
}
.feature-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text);
}
.feature-card p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.75;
}
.feature-card .feature-list {
  margin-top: 14px;
}
.feature-card .feature-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text);
  padding: 4px 0;
}
.feature-card .feature-list li i {
  color: var(--color-success);
  font-size: 11px;
}

/* ===== 图文交替区块 ===== */
.showcase-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 30px 0;
}
.showcase-block + .showcase-block { border-top: 1px solid var(--color-border); padding-top: 60px; }
.showcase-media {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.showcase-media img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.showcase-media:hover img { transform: scale(1.03); }
.showcase-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(11, 17, 32, 0.75);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
}
.showcase-content .tag-line {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.showcase-content h3 {
  font-size: 24px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
  color: var(--color-text);
}
.showcase-content p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.85;
  margin-bottom: 20px;
}
.showcase-points { margin-bottom: 24px; }
.showcase-points li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 6px 0;
  font-size: 14px;
  color: var(--color-text);
}
.showcase-points li i {
  color: var(--color-primary);
  margin-top: 3px;
  font-size: 13px;
  flex-shrink: 0;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
  transition: gap 0.2s;
}
.text-link:hover { gap: 12px; color: var(--color-primary-dark); }

/* ===== 内容卡片 ===== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.article-thumb {
  position: relative;
  overflow: hidden;
  height: 180px;
}
.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.article-card:hover .article-thumb img { transform: scale(1.05); }
.article-thumb .thumb-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--color-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
  z-index: 2;
}
.article-body {
  padding: 20px;
}
.article-body h3 {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--color-text);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}
.article-body h3:hover { color: var(--color-primary); }
.article-body p {
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  margin-bottom: 14px;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--color-text-soft);
}
.article-meta i { font-size: 11px; }
.article-read {
  margin-left: auto;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s;
}
.article-read:hover { gap: 8px; }

/* ===== 流程图 ===== */
.steps-section {
  background: linear-gradient(135deg, var(--color-dark), var(--color-dark-soft));
  color: #fff;
}
.steps-section .section-head h2 { color: #fff; }
.steps-section .section-head p { color: rgba(255, 255, 255, 0.65); }
.steps-section .section-head .tag { background: rgba(6, 182, 212, 0.15); color: var(--color-accent); }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.steps-grid::before {
  content: "";
  position: absolute;
  top: 34px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0.4;
  border-radius: 2px;
}
.step-item {
  text-align: center;
  padding: 0 16px;
  position: relative;
}
.step-dot {
  width: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-dark-soft);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  margin: 0 auto 18px;
  font-size: 22px;
  color: var(--color-accent);
  position: relative;
  z-index: 2;
  box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.15);
}
.step-item h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-item p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.faq-item:hover { border-color: rgba(37, 99, 235, 0.3); box-shadow: var(--shadow-sm); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  user-select: none;
}
.faq-q i {
  color: var(--color-primary);
  font-size: 14px;
  transition: transform 0.3s;
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item.open .faq-q i { transform: rotate(45deg); }
.faq-a {
  display: none;
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.8;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}
.faq-item.open .faq-a { display: block; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(120deg, var(--color-primary), var(--color-accent-light));
  padding: 64px 0;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  opacity: 0.15;
}
.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 680px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 14px;
  line-height: 1.3;
}
.cta-inner p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 28px;
  line-height: 1.8;
}
.btn-white {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}
.btn-white:hover {
  background: #f0f4ff;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
  color: var(--color-primary-dark);
}
.btn-ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(4px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.15); transform: translateY(-2px); }
.cta-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 44px;
}
.footer-brand .logo-text strong { color: #fff; }
.footer-brand .logo-text small { color: rgba(255, 255, 255, 0.5); }
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  margin: 20px 0 16px;
  max-width: 380px;
}
.footer-domain {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-accent);
  background: rgba(6, 182, 212, 0.1);
  padding: 6px 14px;
  border-radius: 999px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}
.footer-col li { margin-bottom: 12px; }
.footer-col a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  transition: color 0.2s, padding-left 0.2s;
}
.footer-col a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
  flex-wrap: wrap;
  gap: 8px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  :root { --space-section: 64px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .article-grid { grid-template-columns: repeat(3, 1fr); }
  .steps-grid::before { display: none; }
  .showcase-block { gap: 32px; }
}
@media (max-width: 768px) {
  .header-search { display: none; }
  .nav-toggle { display: flex; }
  .header-cta { display: none; }
  .channel-nav-inner {
    height: auto;
    flex-wrap: nowrap;
    padding: 8px 0;
  }
  .channel-link { padding: 8px 14px; font-size: 13px; }
  .channel-live { display: none; }
  .category-hero { padding: 60px 0 80px; }
  .category-hero h1 { font-size: 32px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item { border-bottom: 1px solid var(--color-border); }
  .stat-item:nth-child(3), .stat-item:nth-child(4) { border-bottom: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-block { grid-template-columns: 1fr; gap: 24px; }
  .showcase-block + .showcase-block { padding-top: 40px; }
  .showcase-media img { height: 240px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .step-item { padding: 0 8px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-inner h2 { font-size: 26px; }
}
@media (max-width: 520px) {
  :root { --space-section: 48px; }
  .container { padding: 0 16px; }
  .logo-text small { display: none; }
  .logo-text strong { font-size: 17px; }
  .category-hero h1 { font-size: 26px; }
  .category-hero p.hero-lead { font-size: 15px; }
  .hero-badges { flex-direction: column; align-items: flex-start; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--color-border); }
  .stat-item:last-child { border-bottom: none; }
  .section-head h2 { font-size: 24px; }
  .article-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .btn { width: 100%; }
  .cta-actions .btn { width: 100%; }
}

/* roulang page: article */
:root {
    --primary: #1e3a8a;
    --primary-rgb: 30, 58, 138;
    --primary-dark: #172554;
    --primary-light: #3b82f6;
    --accent: #f59e0b;
    --accent-rgb: 245, 158, 11;
    --bg: #f1f5f9;
    --bg-deep: #e2e8f0;
    --surface: #ffffff;
    --surface-soft: #f8fafc;
    --text: #0f172a;
    --text-weak: #566b82;
    --border: #dbe3ee;
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 18px;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 6px 16px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.14);
    --font-sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font-sans); background: var(--bg); color: var(--text); line-height: 1.65; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; }
input { font: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
.container { width: min(1200px, 92vw); margin: 0 auto; }
.section { padding: 64px 0; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 24px; border-radius: var(--radius); font-weight: 600; font-size: 15px; border: 1px solid transparent; transition: transform .25s, box-shadow .25s, background .25s, color .25s; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: var(--shadow-md); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-accent { background: var(--accent); color: #1e293b; box-shadow: var(--shadow-md); }
.btn-accent:hover { background: #d97706; color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.55); }
.btn-outline-light:hover { background: rgba(255,255,255,.14); border-color: #fff; }
.btn-sm { padding: 8px 16px; font-size: 14px; border-radius: var(--radius-sm); }
.btn:focus-visible { outline: 3px solid rgba(var(--primary-rgb), .35); outline-offset: 2px; }

.badge { display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 600; }
.badge-accent { background: rgba(var(--accent-rgb), .16); color: #b45309; }

.site-header { background: var(--surface); box-shadow: var(--shadow-sm); position: relative; z-index: 100; }
.header-brand { border-bottom: 1px solid var(--border); }
.header-brand-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.logo { display: inline-flex; align-items: center; gap: 10px; }
.logo-mark { width: 42px; height: 42px; border-radius: 12px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 18px; box-shadow: var(--shadow-md); flex-shrink: 0; }
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text strong { font-size: 18px; color: var(--text); }
.logo-text small { font-size: 12px; color: var(--text-weak); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.header-search { display: flex; align-items: center; background: var(--surface-soft); border: 1px solid var(--border); border-radius: 999px; padding: 4px 6px 4px 16px; transition: border .2s, box-shadow .2s; }
.header-search:focus-within { border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(var(--primary-rgb), .12); }
.header-search input { border: none; outline: none; background: transparent; padding: 6px 8px; width: 190px; font-size: 14px; color: var(--text); }
.header-search button { background: var(--primary); color: #fff; width: 34px; height: 34px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; transition: background .25s; }
.header-search button:hover { background: var(--primary-dark); }
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface); color: var(--text); font-size: 18px; align-items: center; justify-content: center; transition: .2s; }
.nav-toggle:hover { background: var(--surface-soft); color: var(--primary); }
.channel-nav { background: var(--surface); }
.channel-nav-inner { display: flex; align-items: center; gap: 4px; height: 52px; }
.channel-link { display: inline-flex; align-items: center; padding: 0 18px; font-weight: 500; font-size: 15px; color: var(--text-weak); border-radius: 999px; transition: .2s; }
.channel-link:hover { color: var(--primary); background: rgba(var(--primary-rgb), .07); }
.channel-link.active { color: var(--primary); background: rgba(var(--primary-rgb), .1); font-weight: 600; }
.channel-live { display: inline-flex; align-items: center; gap: 6px; margin-left: auto; font-size: 13px; color: #059669; background: rgba(5,150,105,.08); padding: 6px 14px; border-radius: 999px; white-space: nowrap; }
.channel-live i { font-size: 8px; }

.article-hero { background: linear-gradient(115deg, rgba(15,23,42,.94), rgba(30,58,138,.84)), url('/assets/images/backpic/back-1.png') center/cover no-repeat; color: #fff; padding: 56px 0 48px; }
.crumbs { font-size: 14px; color: rgba(255,255,255,.65); margin-bottom: 24px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.crumbs a { color: rgba(255,255,255,.85); transition: color .2s; }
.crumbs a:hover { color: #fff; }
.crumbs i { font-size: 11px; color: rgba(255,255,255,.4); }
.crumb-current { color: rgba(255,255,255,.9); }
.article-head { max-width: 880px; }
.article-head .badge { background: rgba(255,255,255,.16); color: #fff; margin-bottom: 16px; }
.article-head h1 { font-size: clamp(26px, 4vw, 40px); line-height: 1.25; margin-bottom: 18px; }
.article-excerpt { font-size: 17px; color: rgba(255,255,255,.82); line-height: 1.7; margin-bottom: 22px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 18px; font-size: 14px; color: rgba(255,255,255,.7); }
.article-meta i { margin-right: 4px; }

.article-section { padding: 48px 0 64px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 32px; align-items: start; }
.article-card { background: var(--surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: 36px; border: 1px solid var(--border); }
.article-side { position: sticky; top: 140px; display: flex; flex-direction: column; gap: 24px; }

.article-body { font-size: 16px; line-height: 1.85; color: #1e293b; }
.article-body h2 { font-size: 24px; margin: 40px 0 16px; color: var(--text); position: relative; padding-left: 14px; }
.article-body h2::before { content: ''; position: absolute; left: 0; top: 6px; bottom: 6px; width: 4px; border-radius: 4px; background: linear-gradient(var(--primary), var(--primary-light)); }
.article-body h3 { font-size: 20px; margin: 32px 0 12px; color: var(--text); }
.article-body p { margin: 0 0 18px; }
.article-body img { border-radius: var(--radius-lg); margin: 24px 0; }
.article-body ul, .article-body ol { margin: 0 0 18px; padding-left: 24px; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 8px; }
.article-body blockquote { border-left: 4px solid var(--primary-light); background: var(--surface-soft); padding: 16px 20px; margin: 24px 0; border-radius: 0 var(--radius) var(--radius) 0; color: var(--text-weak); }
.article-body a { color: var(--primary); text-decoration: underline; }
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-body th { background: var(--surface-soft); font-weight: 600; }
.article-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--border); }
.article-tags span { display: inline-flex; align-items: center; gap: 6px; background: var(--surface-soft); border: 1px solid var(--border); padding: 5px 12px; border-radius: 999px; font-size: 13px; color: var(--text-weak); }

.not-found { text-align: center; padding: 60px 20px; }
.not-found i { font-size: 64px; color: #cbd5e1; margin-bottom: 20px; }
.not-found h2 { font-size: 28px; margin-bottom: 12px; }
.not-found p { color: var(--text-weak); margin-bottom: 24px; }

.side-panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); padding: 24px; }
.side-panel h3 { font-size: 17px; display: flex; align-items: center; gap: 8px; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); color: var(--text); }
.side-panel h3 i { color: var(--primary); }
.side-list li + li { border-top: 1px solid var(--border); }
.side-list a { display: flex; flex-direction: column; gap: 4px; padding: 12px 0; transition: padding .2s; }
.side-list a:hover { padding-left: 6px; }
.side-list a:hover .side-title { color: var(--primary); }
.side-title { font-size: 14px; line-height: 1.5; color: var(--text); transition: color .2s; }
.side-date { font-size: 12px; color: var(--text-weak); }
.side-cta p { font-size: 14px; color: var(--text-weak); margin-bottom: 16px; line-height: 1.6; }
.side-cta .btn { width: 100%; }
.side-faq li + li { border-top: 1px solid var(--border); }
.side-faq a { display: block; padding: 12px 0; font-size: 14px; color: var(--text-weak); transition: .2s; }
.side-faq a:hover { color: var(--primary); padding-left: 6px; }

.section-head { text-align: center; max-width: 640px; margin: 0 auto 40px; }
.section-kicker { display: inline-block; text-transform: uppercase; font-size: 12px; letter-spacing: 2px; color: var(--primary); background: rgba(var(--primary-rgb), .08); padding: 6px 14px; border-radius: 999px; margin-bottom: 14px; font-weight: 700; }
.section-head h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 10px; color: var(--text); }
.section-head p { color: var(--text-weak); font-size: 16px; }

.section-related { background: var(--surface-soft); border-bottom: 1px solid var(--border); }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: var(--surface); border-radius: var(--radius-lg); border: 1px solid var(--border); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .3s, box-shadow .3s; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.news-card-cover { aspect-ratio: 16/10; overflow: hidden; background: var(--bg-deep); }
.news-card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.news-card:hover .news-card-cover img { transform: scale(1.05); }
.news-card-body { padding: 22px; display: flex; flex-direction: column; gap: 8px; }
.news-tag { align-self: flex-start; font-size: 12px; color: var(--primary); background: rgba(var(--primary-rgb), .08); padding: 4px 10px; border-radius: 999px; font-weight: 600; }
.news-card-body h3 { font-size: 17px; line-height: 1.5; color: var(--text); transition: color .2s; }
.news-card:hover .news-card-body h3 { color: var(--primary); }
.news-card-body p { font-size: 14px; color: var(--text-weak); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-empty { grid-column: 1 / -1; text-align: center; color: var(--text-weak); padding: 30px 0; }

.faq-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow-sm); transition: .3s; }
.faq-item:hover { box-shadow: var(--shadow-md); border-color: #d3def0; }
.faq-item h3 { font-size: 17px; display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; color: var(--text); }
.faq-item h3 i { color: var(--accent); margin-top: 3px; }
.faq-item p { font-size: 14px; color: var(--text-weak); line-height: 1.75; }

.section-cta { padding: 64px 0; }
.cta-box { background: linear-gradient(120deg, rgba(23,37,84,.96), rgba(30,58,138,.88)), url('/assets/images/backpic/back-2.png') center/cover no-repeat; border-radius: 24px; padding: 64px 48px; color: #fff; text-align: center; box-shadow: var(--shadow-lg); }
.cta-badge { display: inline-block; background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.2); padding: 6px 16px; border-radius: 999px; font-size: 13px; margin-bottom: 20px; letter-spacing: 1px; }
.cta-box h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 14px; }
.cta-box p { font-size: 16px; color: rgba(255,255,255,.85); margin-bottom: 32px; }
.cta-buttons { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.site-footer { background: #0f172a; color: #94a3b8; }
.site-footer .container { padding: 56px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.site-footer .logo-text strong { color: #fff; }
.site-footer .logo-text small { color: #94a3b8; }
.site-footer .logo-mark { background: linear-gradient(135deg, var(--primary-light), var(--accent)); }
.footer-desc { margin-top: 18px; font-size: 14px; line-height: 1.7; max-width: 380px; }
.footer-domain { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; color: #e2e8f0; background: rgba(255,255,255,.06); padding: 6px 14px; border-radius: 8px; font-size: 13px; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer-col li + li { margin-top: 12px; }
.footer-col a { font-size: 14px; color: #94a3b8; transition: .2s; }
.footer-col a:hover { color: #fff; padding-left: 4px; }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.08); font-size: 13px; color: #64748b; }

@media (max-width: 1024px) {
    .article-layout { grid-template-columns: 1fr; }
    .article-side { position: static; }
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .faq-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .section { padding: 48px 0; }
    .header-search { display: none; }
    .nav-toggle { display: inline-flex; }
    .channel-nav { position: absolute; left: 0; right: 0; display: none; background: var(--surface); box-shadow: var(--shadow-lg); border-top: 1px solid var(--border); }
    .site-header.nav-open .channel-nav { display: block; }
    .channel-nav-inner { flex-direction: column; height: auto; padding: 10px 0; }
    .channel-link { width: calc(100% - 32px); margin: 0 16px; border-radius: 10px; padding: 12px 16px; }
    .channel-live { display: none; }
    .article-hero { padding: 44px 0 36px; }
    .article-card { padding: 24px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .cta-box { padding: 44px 24px; }
}
@media (max-width: 520px) {
    .header-brand-inner { height: 60px; }
    .logo-text small { display: none; }
    .header-cta { width: 40px; height: 40px; padding: 0; font-size: 0; border-radius: var(--radius-sm); }
    .header-cta i { font-size: 16px; }
    .card-grid, .faq-grid { grid-template-columns: 1fr; }
    .article-meta { flex-direction: column; gap: 8px; }
    .cta-buttons { flex-direction: column; }
    .cta-buttons .btn { width: 100%; }
    .footer-bottom { flex-direction: column; }
}

/* roulang page: category3 */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #eff6ff;
  --accent: #0ea5e9;
  --accent-dark: #0369a1;
  --success: #10b981;
  --warning: #f59e0b;
  --dark-bg: #0f172a;
  --dark-bg-2: #1e293b;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --text-main: #1e293b;
  --text-body: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
  --shadow-primary: 0 8px 24px rgba(37, 99, 235, 0.18);
  --container: 1200px;
  --space-section: 88px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  color: var(--text-main);
  background: var(--bg-white);
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input { font-family: inherit; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 100px;
  background: var(--primary-light);
  color: var(--primary);
  letter-spacing: 0.3px;
}
.badge-accent {
  background: rgba(14, 165, 233, 0.1);
  color: var(--accent-dark);
}
.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: #047857;
}
.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: #b45309;
}
.section {
  padding: var(--space-section) 0;
}
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-header .section-title {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.5px;
  margin: 14px 0 12px;
  color: var(--text-main);
}
.section-header .section-subtitle {
  font-size: 16px;
  color: var(--text-body);
  line-height: 1.8;
}

/* Header */
.site-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.02);
}
.header-brand-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.logo-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  box-shadow: var(--shadow-primary);
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}
.logo-text strong {
  font-size: 19px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.3px;
}
.logo-text small {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.header-search {
  display: flex;
  align-items: center;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 100px;
  overflow: hidden;
  height: 40px;
  transition: var(--transition);
}
.header-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  background: var(--bg-white);
}
.header-search input {
  border: none;
  background: transparent;
  padding: 0 16px;
  font-size: 14px;
  color: var(--text-main);
  outline: none;
  width: 200px;
}
.header-search button {
  padding: 0 14px;
  color: var(--text-muted);
  font-size: 14px;
  display: flex;
  align-items: center;
  height: 100%;
  transition: var(--transition);
}
.header-search button:hover { color: var(--primary); }
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 20px;
  border-radius: 100px;
  box-shadow: var(--shadow-primary);
  transition: var(--transition);
  white-space: nowrap;
}
.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.25);
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--bg-light);
  color: var(--text-main);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.nav-toggle:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.channel-nav {
  background: var(--dark-bg);
  border-top: 1px solid rgba(255,255,255,0.06);
}
.channel-nav-inner {
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 52px;
  overflow-x: auto;
  scrollbar-width: none;
}
.channel-nav-inner::-webkit-scrollbar { display: none; }
.channel-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  color: rgba(255,255,255,0.75);
  font-size: 14.5px;
  font-weight: 500;
  border-radius: 100px;
  transition: var(--transition);
  white-space: nowrap;
  letter-spacing: 0.3px;
}
.channel-link:hover {
  color: #fff;
  background: rgba(255,255,255,0.08);
}
.channel-link.active {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}
.channel-live {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.5);
  font-size: 12.5px;
  padding: 0 8px;
  white-space: nowrap;
}
.channel-live i {
  color: var(--success);
  font-size: 9px;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

/* Hero Banner */
.category-banner {
  position: relative;
  background: linear-gradient(135deg, rgba(15,23,42,0.92), rgba(30,41,59,0.78)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  padding: 100px 0 90px;
  color: #fff;
  overflow: hidden;
}
.category-banner::after {
  content: '';
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(14,165,233,0.25), transparent 70%);
  border-radius: 50%;
}
.category-banner .container {
  position: relative;
  z-index: 2;
}
.banner-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 20px;
}
.banner-crumb a:hover { color: #fff; }
.banner-crumb i {
  font-size: 10px;
  color: rgba(255,255,255,0.4);
}
.banner-crumb .crumb-now {
  color: rgba(255,255,255,0.9);
}
.category-banner h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin: 0 0 16px;
  max-width: 720px;
}
.category-banner h1 span {
  color: #38bdf8;
}
.category-banner .banner-desc {
  font-size: 16.5px;
  color: rgba(255,255,255,0.8);
  max-width: 640px;
  line-height: 1.8;
  margin-bottom: 30px;
}
.banner-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.banner-stat {
  display: flex;
  flex-direction: column;
}
.banner-stat strong {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}
.banner-stat span {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
}

/* Quick Nav cards */
.quick-nav-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: -56px;
  position: relative;
  z-index: 10;
}
.quick-nav-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 26px 24px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  text-align: center;
}
.quick-nav-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.15);
}
.quick-nav-card .quick-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.quick-nav-card:nth-child(2) .quick-icon {
  background: rgba(14,165,233,0.1);
  color: var(--accent-dark);
}
.quick-nav-card:nth-child(3) .quick-icon {
  background: rgba(16,185,129,0.1);
  color: #047857;
}
.quick-nav-card:nth-child(4) .quick-icon {
  background: rgba(245,158,11,0.1);
  color: #b45309;
}
.quick-nav-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}
.quick-nav-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Steps */
.steps-section {
  background: var(--bg-light);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  counter-reset: step;
}
.step-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  position: relative;
  transition: var(--transition);
  counter-increment: step;
}
.step-card::before {
  content: "0" counter(step);
  position: absolute;
  top: 24px;
  right: 26px;
  font-size: 44px;
  font-weight: 800;
  color: var(--border-light);
  line-height: 1;
  transition: var(--transition);
}
.step-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(37,99,235,0.15);
  transform: translateY(-4px);
}
.step-card:hover::before {
  color: rgba(37,99,235,0.12);
}
.step-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
}
.step-card:nth-child(1) .step-icon {
  background: var(--primary-light);
  color: var(--primary);
}
.step-card:nth-child(2) .step-icon {
  background: rgba(14,165,233,0.1);
  color: var(--accent-dark);
}
.step-card:nth-child(3) .step-icon {
  background: rgba(16,185,129,0.1);
  color: #047857;
}
.step-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}
.step-card p {
  font-size: 14.5px;
  color: var(--text-body);
  line-height: 1.75;
}

/* Operation Guide */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.guide-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.guide-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37,99,235,0.12);
}
.guide-card-media {
  height: 180px;
  overflow: hidden;
  position: relative;
}
.guide-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.guide-card:hover .guide-card-media img {
  transform: scale(1.05);
}
.guide-card-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(15,23,42,0.35));
}
.guide-card-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  font-size: 12px;
  font-weight: 600;
  background: rgba(255,255,255,0.92);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 100px;
  backdrop-filter: blur(4px);
}
.guide-card-body {
  padding: 24px 24px 26px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.guide-card-body h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
}
.guide-card-body p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}
.guide-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.guide-link i {
  font-size: 11px;
  transition: var(--transition);
}
.guide-link:hover i {
  transform: translateX(4px);
}

/* Tips */
.tips-section {
  background: var(--dark-bg);
  position: relative;
  overflow: hidden;
}
.tips-section::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(37,99,235,0.2), transparent 70%);
  border-radius: 50%;
}
.tips-section .section-header .section-title { color: #fff; }
.tips-section .section-header .section-subtitle { color: rgba(255,255,255,0.65); }
.tips-section .badge {
  background: rgba(37,99,235,0.2);
  color: #93c5fd;
}
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  position: relative;
  z-index: 2;
}
.tip-item {
  display: flex;
  gap: 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  transition: var(--transition);
}
.tip-item:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.14);
}
.tip-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(37,99,235,0.2);
  color: #93c5fd;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.tip-item:nth-child(2) .tip-icon {
  background: rgba(14,165,233,0.15);
  color: #7dd3fc;
}
.tip-item:nth-child(3) .tip-icon {
  background: rgba(16,185,129,0.15);
  color: #34d399;
}
.tip-item:nth-child(4) .tip-icon {
  background: rgba(245,158,11,0.15);
  color: #fbbf24;
}
.tip-item h3 {
  font-size: 15.5px;
  font-weight: 700;
  color: #f1f5f9;
  margin-bottom: 4px;
}
.tip-item p {
  font-size: 13.5px;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
}

/* FAQ */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  background: var(--bg-white);
  transition: var(--transition);
  overflow: hidden;
}
.faq-item:hover {
  border-color: rgba(37,99,235,0.18);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  text-align: left;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text-main);
  background: transparent;
}
.faq-question .faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item.active .faq-icon {
  background: var(--primary);
  color: #fff;
}
.faq-item.active .faq-icon i {
  transform: rotate(45deg);
}
.faq-answer {
  display: none;
  padding: 0 24px 22px;
  font-size: 14.5px;
  color: var(--text-body);
  line-height: 1.75;
}

/* CTA */
.cta-section {
  padding: 70px 0;
  background: linear-gradient(135deg, var(--primary), var(--accent-dark));
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.08;
  pointer-events: none;
}
.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
  color: #fff;
}
.cta-inner h2 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}
.cta-inner p {
  font-size: 16px;
  color: rgba(255,255,255,0.85);
  margin-bottom: 30px;
  line-height: 1.8;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 100px;
  transition: var(--transition);
}
.btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(0,0,0,0.18);
}
.btn-outline-white {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.6);
}
.btn-outline-white:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

/* Footer */
.site-footer {
  background: var(--dark-bg);
  color: rgba(255,255,255,0.7);
  padding: 70px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo .logo-text strong {
  color: #fff;
}
.footer-brand .logo .logo-text small {
  color: rgba(255,255,255,0.5);
}
.footer-desc {
  font-size: 14.5px;
  line-height: 1.8;
  margin-top: 18px;
  max-width: 360px;
  color: rgba(255,255,255,0.55);
}
.footer-domain {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.06);
  padding: 5px 14px;
  border-radius: 100px;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  transition: var(--transition);
}
.footer-col ul li a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 26px;
  font-size: 13px;
  color: rgba(255,255,255,0.35);
  flex-wrap: wrap;
  gap: 8px;
}

/* Responsive */
@media (max-width: 1024px) {
  .quick-nav-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .category-banner h1 { font-size: 38px; }
}
@media (max-width: 768px) {
  :root { --space-section: 64px; }
  .container { padding: 0 20px; }
  .header-brand-inner { height: 64px; }
  .header-search { display: none; }
  .header-cta { display: none; }
  .nav-toggle { display: flex; }
  .channel-nav {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    background: var(--dark-bg);
  }
  .channel-nav.open {
    max-height: 300px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .channel-nav-inner {
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px;
    min-height: auto;
  }
  .channel-link {
    padding: 10px 16px;
    border-radius: 10px;
  }
  .channel-live { display: none; }
  .category-banner { padding: 64px 0 76px; }
  .category-banner h1 { font-size: 30px; }
  .banner-desc { font-size: 14.5px; }
  .banner-stats { gap: 20px; }
  .banner-stat strong { font-size: 22px; }
  .section-header .section-title { font-size: 27px; }
  .tips-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-inner h2 { font-size: 26px; }
}
@media (max-width: 520px) {
  .quick-nav-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .category-banner h1 { font-size: 26px; }
  .banner-stats { flex-direction: column; gap: 12px; }
  .section-header .section-title { font-size: 24px; }
  .faq-question { padding: 16px 18px; font-size: 14.5px; }
  .faq-answer { padding: 0 18px 18px; }
}

/* roulang page: category2 */
:root {
    --primary: #1e3a5f;
    --primary-dark: #142b47;
    --primary-light: #2d5b8e;
    --accent: #0ea5e9;
    --accent-light: #e0f2fe;
    --warm: #f59e0b;
    --bg: #f8fafc;
    --bg-deep: #f1f5f9;
    --text: #1e293b;
    --text-weak: #64748b;
    --border: #e2e8f0;
    --white: #ffffff;
    --radius: 14px;
    --radius-sm: 10px;
    --shadow: 0 4px 20px rgba(30, 58, 95, 0.08);
    --shadow-lg: 0 12px 40px rgba(30, 58, 95, 0.12);
    --spacer: 84px;
    --transition: 0.25s ease;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }

  a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
  }

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

  button,
  input {
    font-family: inherit;
    font-size: inherit;
    border: none;
    background: none;
    outline: none;
  }

  ul,
  ol {
    list-style: none;
  }

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

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    line-height: 1.4;
    cursor: pointer;
    transition: all var(--transition);
    border: 2px solid transparent;
  }

  .btn i {
    font-size: 14px;
  }

  .btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    color: var(--white);
    box-shadow: 0 4px 14px rgba(14, 165, 233, 0.3);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(14, 165, 233, 0.4);
    color: var(--white);
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(14, 165, 233, 0.3);
  }

  .btn-primary:focus-visible {
    outline: 3px solid rgba(14, 165, 233, 0.5);
    outline-offset: 3px;
  }

  .btn-outline {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.7);
    color: var(--white);
  }

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

  .btn-outline:active {
    transform: translateY(0);
  }

  .btn-outline:focus-visible {
    outline: 3px solid rgba(255, 255, 255, 0.5);
    outline-offset: 3px;
  }

  .btn-ghost {
    background: var(--accent-light);
    color: var(--primary-light);
  }

  .btn-ghost:hover {
    background: #c7e9fb;
    color: var(--primary-dark);
    transform: translateY(-2px);
  }

  .btn-ghost:active {
    transform: translateY(0);
  }

  .btn-ghost:focus-visible,
  .btn-outline:focus-visible,
  .btn-primary:focus-visible {
    outline: 3px solid rgba(14, 165, 233, 0.4);
    outline-offset: 3px;
  }

  .btn-sm {
    padding: 7px 16px;
    font-size: 14px;
  }

  .btn-sm i {
    font-size: 12px;
  }

  /* ===== Header ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 12px rgba(30, 58, 95, 0.04);
    transition: box-shadow var(--transition);
  }

  .site-header.scrolled {
    box-shadow: 0 4px 24px rgba(30, 58, 95, 0.10);
  }

  .header-brand {
    background: var(--white);
  }

  .header-brand-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .logo-mark {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 18px;
    box-shadow: 0 4px 14px rgba(14, 165, 233, 0.35);
  }

  .logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
  }

  .logo-text strong {
    font-size: 18px;
    font-weight: 800;
    color: var(--primary-dark);
    letter-spacing: 0.3px;
  }

  .logo-text small {
    font-size: 12px;
    color: var(--text-weak);
    margin-top: 2px;
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
  }

  .header-search {
    display: flex;
    align-items: center;
    background: var(--bg-deep);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 4px 4px 4px 16px;
    transition: border-color var(--transition), box-shadow var(--transition);
  }

  .header-search:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
    background: var(--white);
  }

  .header-search input {
    width: 210px;
    font-size: 14px;
    color: var(--text);
    padding: 5px 0;
    background: transparent;
  }

  .header-search input::placeholder {
    color: var(--text-weak);
  }

  .header-search button {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 13px;
    transition: background var(--transition);
  }

  .header-search button:hover {
    background: var(--accent);
  }

  .header-search button:focus-visible {
    outline: 3px solid rgba(14, 165, 233, 0.4);
  }

  .header-cta {
    flex-shrink: 0;
  }

  .nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--bg-deep);
    color: var(--primary);
    font-size: 18px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: background var(--transition), color var(--transition);
    border: 1px solid transparent;
  }

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

  .nav-toggle:focus-visible {
    outline: 3px solid rgba(14, 165, 233, 0.4);
    outline-offset: 2px;
  }

  .nav-toggle.active {
    background: var(--primary);
    color: var(--white);
  }

  .channel-nav {
    background: var(--white);
    border-top: 1px solid var(--border);
  }

  .channel-nav-inner {
    display: flex;
    align-items: center;
    gap: 4px;
    padding-top: 6px;
    padding-bottom: 6px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .channel-nav-inner::-webkit-scrollbar {
    display: none;
  }

  .channel-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-weak);
    border-radius: 999px;
    white-space: nowrap;
    transition: all var(--transition);
  }

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

  .channel-link.active {
    color: var(--white);
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    box-shadow: 0 4px 14px rgba(30, 58, 95, 0.25);
  }

  .channel-live {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-weak);
    padding: 6px 12px;
    border-left: 1px solid var(--border);
    white-space: nowrap;
  }

  .channel-live i {
    font-size: 8px;
    color: #22c55e;
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
  }

  /* ===== Page Banner ===== */
  .page-banner {
    position: relative;
    background: linear-gradient(135deg, rgba(20, 43, 71, 0.92), rgba(14, 165, 233, 0.72)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
    color: var(--white);
    padding: 90px 0 100px;
    overflow: hidden;
  }

  .page-banner-inner {
    position: relative;
    z-index: 2;
    max-width: 800px;
  }

  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    opacity: 0.85;
    margin-bottom: 22px;
    flex-wrap: wrap;
  }

  .breadcrumb a {
    transition: opacity var(--transition);
  }

  .breadcrumb a:hover {
    opacity: 1;
    text-decoration: underline;
  }

  .breadcrumb i {
    font-size: 12px;
    opacity: 0.6;
  }

  .banner-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.16);
    border: 1px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(6px);
    border-radius: 999px;
    padding: 5px 14px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 18px;
  }

  .banner-tag i {
    color: #7dd3fc;
  }

  .banner-title {
    font-size: 40px;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: 0.5px;
    margin-bottom: 18px;
  }

  .banner-title span {
    color: #7dd3fc;
  }

  .banner-desc {
    font-size: 16px;
    line-height: 1.8;
    opacity: 0.9;
    max-width: 640px;
    margin-bottom: 30px;
  }

  .banner-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
  }

  /* ===== Section ===== */
  .section {
    padding: var(--spacer) 0;
  }

  .section-alt {
    background: var(--white);
  }

  .section-alt-2 {
    background: var(--bg-deep);
  }

  .section-head {
    max-width: 720px;
    margin-bottom: 48px;
  }

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

  .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent-light);
    color: var(--primary-light);
    border-radius: 999px;
    padding: 4px 14px;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 14px;
  }

  .section-title {
    font-size: 30px;
    font-weight: 800;
    color: var(--primary-dark);
    line-height: 1.35;
    margin-bottom: 12px;
  }

  .section-subtitle {
    font-size: 15px;
    color: var(--text-weak);
    line-height: 1.8;
  }

  /* ===== Stats ===== */
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .stat-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px 26px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
  }

  .stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--primary-light));
    opacity: 0;
    transition: opacity var(--transition);
  }

  .stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
  }

  .stat-card:hover::after {
    opacity: 1;
  }

  .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--accent-light);
    color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 18px;
  }

  .stat-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary-dark);
    line-height: 1.2;
    margin-bottom: 6px;
  }

  .stat-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
  }

  .stat-desc {
    font-size: 13px;
    color: var(--text-weak);
    line-height: 1.6;
  }

  /* ===== Feature cards ===== */
  .features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .feature-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 30px 26px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    position: relative;
  }

  .feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
  }

  .feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 20px;
    box-shadow: 0 4px 14px rgba(14, 165, 233, 0.25);
  }

  .feature-tag {
    display: inline-block;
    background: var(--bg-deep);
    border: 1px solid var(--border);
    color: var(--text-weak);
    font-size: 12px;
    font-weight: 600;
    border-radius: 999px;
    padding: 2px 10px;
    margin-bottom: 14px;
  }

  .feature-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 10px;
  }

  .feature-desc {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.75;
  }

  /* ===== Guide ===== */
  .guide-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 36px;
    align-items: center;
  }

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

  .guide-media img {
    width: 100%;
    height: 420px;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

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

  .guide-media::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(20, 43, 71, 0.35));
    pointer-events: none;
  }

  .guide-content h3 {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary-dark);
    margin-bottom: 14px;
  }

  .guide-content p {
    color: var(--text-weak);
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 22px;
  }

  .guide-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .step-item {
    display: flex;
    gap: 14px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    transition: box-shadow var(--transition), transform var(--transition);
  }

  .step-item:hover {
    box-shadow: var(--shadow);
    transform: translateX(4px);
  }

  .step-num {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--accent-light);
    color: var(--primary-light);
    font-size: 14px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .step-body strong {
    display: block;
    font-size: 15px;
    color: var(--primary-dark);
    margin-bottom: 4px;
  }

  .step-body span {
    font-size: 13px;
    color: var(--text-weak);
    line-height: 1.6;
  }

  /* ===== Data bar ===== */
  .data-bar {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
    border-radius: var(--radius);
    padding: 48px 40px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    color: var(--white);
    box-shadow: 0 16px 48px rgba(30, 58, 95, 0.25);
    position: relative;
    overflow: hidden;
  }

  .data-bar::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(125, 211, 252, 0.12);
  }

  .data-item {
    text-align: center;
    position: relative;
    z-index: 2;
  }

  .data-num {
    font-size: 38px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 6px;
  }

  .data-label {
    font-size: 14px;
    opacity: 0.85;
  }

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

  .faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .faq-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition);
  }

  .faq-item:hover {
    border-color: rgba(14, 165, 233, 0.4);
    box-shadow: var(--shadow);
  }

  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 22px;
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-dark);
    background: transparent;
    cursor: pointer;
    text-align: left;
    transition: color var(--transition), background var(--transition);
  }

  .faq-question:hover {
    color: var(--primary-light);
  }

  .faq-question:focus-visible {
    outline: 3px solid rgba(14, 165, 233, 0.4);
    outline-offset: -2px;
  }

  .faq-question i {
    color: var(--accent);
    flex-shrink: 0;
    transition: transform 0.3s ease;
    font-size: 14px;
  }

  .faq-item.active .faq-question i {
    transform: rotate(45deg);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
  }

  .faq-answer-inner {
    padding: 0 22px 20px;
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.8;
    border-top: 1px dashed var(--border);
    padding-top: 16px;
    margin: 0 22px 0 0;
  }

  /* ===== CTA ===== */
  .cta-section {
    padding: 70px 0;
    background: var(--bg-deep);
  }

  .cta-box {
    max-width: 1000px;
    margin: 0 auto;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
    border-radius: 24px;
    padding: 56px 48px;
    text-align: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(30, 58, 95, 0.3);
  }

  .cta-box::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -80px;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: rgba(125, 211, 252, 0.1);
  }

  .cta-box::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -60px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(245, 158, 11, 0.08);
  }

  .cta-box h2 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 14px;
    position: relative;
    z-index: 2;
  }

  .cta-box p {
    font-size: 15px;
    opacity: 0.9;
    max-width: 560px;
    margin: 0 auto 30px;
    line-height: 1.8;
    position: relative;
    z-index: 2;
  }

  .cta-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
  }

  /* ===== Footer ===== */
  .site-footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 56px 0 0;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .footer-brand .logo-text strong {
    color: var(--white);
  }

  .footer-brand .logo-text small {
    color: rgba(255, 255, 255, 0.5);
  }

  .footer-desc {
    font-size: 14px;
    line-height: 1.8;
    margin: 18px 0 14px;
    max-width: 360px;
    color: rgba(255, 255, 255, 0.65);
  }

  .footer-domain {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: rgba(125, 211, 252, 0.8);
    background: rgba(125, 211, 252, 0.08);
    border: 1px solid rgba(125, 211, 252, 0.15);
    border-radius: 999px;
    padding: 4px 12px;
  }

  .footer-col h4 {
    color: var(--white);
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 16px;
  }

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

  .footer-col ul a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition), padding-left var(--transition);
  }

  .footer-col ul a:hover {
    color: #7dd3fc;
    padding-left: 6px;
  }

  .footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 22px 0;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
    flex-wrap: wrap;
    gap: 10px;
  }

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

    .header-search input {
      width: 150px;
    }

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

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

    .data-bar {
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      padding: 40px 30px;
    }

    .guide-grid {
      gap: 28px;
    }

    .guide-media img {
      height: 360px;
    }
  }

  @media (max-width: 768px) {
    :root {
      --spacer: 52px;
    }

    .header-actions {
      gap: 10px;
    }

    .header-search {
      display: none;
    }

    .nav-toggle {
      display: flex;
    }

    .channel-nav {
      display: none;
      border-top: 1px solid var(--border);
    }

    .channel-nav.open {
      display: block;
    }

    .channel-nav-inner {
      flex-direction: column;
      align-items: flex-start;
      padding: 12px 24px;
      gap: 2px;
      overflow: visible;
    }

    .channel-link {
      width: 100%;
      border-radius: 10px;
      padding: 12px 14px;
    }

    .channel-live {
      margin-left: 0;
      border-left: none;
      border-top: 1px solid var(--border);
      margin-top: 8px;
      padding: 12px 14px;
    }

    .page-banner {
      padding: 60px 0 70px;
    }

    .banner-title {
      font-size: 30px;
    }

    .banner-desc {
      font-size: 15px;
    }

    .section-title {
      font-size: 24px;
    }

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

    .guide-media img {
      height: 300px;
    }

    .guide-content {
      order: -1;
    }

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

    .footer-col ul {
      flex-direction: row;
      flex-wrap: wrap;
      gap: 14px;
    }

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

  @media (max-width: 520px) {
    .header-brand-inner {
      padding-top: 10px;
      padding-bottom: 10px;
    }

    .logo-mark {
      width: 36px;
      height: 36px;
      font-size: 15px;
      border-radius: 10px;
    }

    .logo-text strong {
      font-size: 16px;
    }

    .logo-text small {
      font-size: 11px;
    }

    .header-cta {
      font-size: 13px;
      padding: 6px 13px;
    }

    .banner-title {
      font-size: 25px;
    }

    .banner-tag {
      font-size: 12px;
      padding: 4px 10px;
    }

    .stats-grid {
      grid-template-columns: 1fr;
      gap: 14px;
    }

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

    .data-bar {
      grid-template-columns: 1fr;
      gap: 20px;
      padding: 32px 20px;
    }

    .data-num {
      font-size: 30px;
    }

    .cta-box {
      padding: 40px 22px;
      border-radius: 18px;
    }

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

    .cta-actions .btn {
      width: 100%;
      justify-content: center;
    }

    .section-head {
      margin-bottom: 32px;
    }

    .section-title {
      font-size: 22px;
    }
  }