/* roulang page: index */
:root {
  --bg-deep: #050A1E;
  --bg-body: #0A1535;
  --brand: #1F6FFF;
  --gold: #FFB800;
  --cyan: #31D0C0;
  --danger: #FF4D6A;
  --text: #DCE4F5;
  --text-2: #8A97B5;
  --text-3: #5A678C;
  --line: rgba(255,255,255,0.10);
  --line-2: rgba(255,255,255,0.12);
  --glass: rgba(255,255,255,0.05);
  --glass-hover: rgba(255,255,255,0.09);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow: 0 10px 30px rgba(0,0,0,0.25), 0 0 0 1px rgba(255,255,255,0.06) inset;
  --shadow-hover: 0 16px 40px rgba(0,0,0,0.35), 0 0 20px rgba(31,111,255,0.15);
  --shadow-btn: 0 0 20px rgba(31,111,255,0.40);
  --shadow-btn-hover: 0 0 34px rgba(31,111,255,0.65), 0 4px 12px rgba(0,0,0,0.30);
  --fs-hero: clamp(2.25rem, 5vw, 3.5rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.25rem);
  --fs-h3: 1.25rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --sp-section: 80px;
  --sp-section-mobile: 48px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  font-size:var(--fs-body);
  line-height:1.75;
  color:var(--text);
  background:linear-gradient(135deg,var(--bg-deep),var(--bg-body));
  background-attachment:fixed;
  min-height:100vh;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .25s ease}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:0;background:none;color:inherit}
input:focus{outline:none}
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid rgba(31,111,255,0.6);
  outline-offset:2px;
}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--sp-section) 0}
.section-head{text-align:center;margin-bottom:48px}
.section-title{font-size:var(--fs-h2);font-weight:700;line-height:1.3;color:var(--text);letter-spacing:.01em}
.section-sub{font-size:var(--fs-body);color:var(--text-2);max-width:640px;margin:12px auto 0;line-height:1.6}
.glass-card{
  background:var(--glass);
  border:1px solid var(--line-2);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 28px;
  border-radius:var(--radius-sm);
  font-size:var(--fs-body);
  font-weight:600;
  letter-spacing:.02em;
  transition:all .3s ease;
  white-space:nowrap;
  user-select:none;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--cyan));
  color:#fff;
  box-shadow:var(--shadow-btn);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-btn-hover);
}
.btn-primary:active{
  transform:translateY(-1px) scale(.98);
  box-shadow:var(--shadow-btn);
}
.btn-ghost{
  background:rgba(255,255,255,0.04);
  border:1px solid var(--line-2);
  color:var(--text);
}
.btn-ghost:hover{
  background:rgba(31,111,255,0.12);
  border-color:rgba(31,111,255,0.5);
}
.btn-lg{height:54px;padding:0 36px;font-size:1.0625rem;border-radius:12px}
.btn-sm{height:40px;padding:0 20px;font-size:var(--fs-small)}
.btn-block{width:100%}
/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:999;
  background:rgba(5,10,30,0.85);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,0.06);
  transition:box-shadow .3s ease;
}
.site-header.scrolled{box-shadow:0 8px 30px rgba(0,0,0,0.3)}
.header-top{
  height:64px;
  display:flex;
  align-items:center;
}
.header-top-inner{display:flex;align-items:center;justify-content:space-between;width:100%}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo-icon{width:34px;height:34px;display:flex;align-items:center;justify-content:center}
.logo-text{font-size:1.25rem;font-weight:800;color:var(--text);letter-spacing:.02em;white-space:nowrap}
.header-actions{display:flex;align-items:center;gap:16px}
.search-form{
  display:flex;
  align-items:center;
  background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.10);
  border-radius:var(--radius-pill);
  height:42px;
  padding:0 6px 0 16px;
  width:220px;
  transition:width .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.search-form:focus-within{
  width:260px;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(31,111,255,0.2);
}
.search-form input{
  flex:1;
  background:transparent;
  border:0;
  color:var(--text);
  font-size:var(--fs-small);
  min-width:0;
}
.search-form input::placeholder{color:#6B7A99}
.search-form button{
  width:32px;
  height:32px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--text-2);
  transition:background .25s,color .25s;
  flex-shrink:0;
}
.search-form button:hover{background:rgba(31,111,255,0.15);color:var(--text)}
.header-nav{
  border-top:1px solid rgba(255,255,255,0.05);
  background:rgba(5,10,30,0.6);
}
.nav-pills{
  display:flex;
  align-items:center;
  gap:10px;
  padding:8px 24px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.nav-pills::-webkit-scrollbar{display:none}
.nav-pill{
  display:inline-flex;
  align-items:center;
  height:32px;
  padding:0 20px;
  border-radius:var(--radius-pill);
  font-size:var(--fs-small);
  font-weight:500;
  color:var(--text-2);
  background:var(--glass);
  border:1px solid transparent;
  white-space:nowrap;
  transition:all .25s ease;
  flex-shrink:0;
}
.nav-pill:hover{
  background:rgba(255,255,255,0.09);
  color:var(--text);
}
.nav-pill.active{
  background:linear-gradient(135deg,var(--brand),var(--cyan));
  color:#fff;
  font-weight:600;
  box-shadow:0 4px 16px rgba(31,111,255,0.3);
}
/* Hero */
.hero{
  position:relative;
  min-height:min(100vh,900px);
  display:flex;
  align-items:center;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.hero-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(5,10,30,0.92),rgba(10,21,53,0.75));
  z-index:1;
}
.hero-overlay::after{
  content:'';
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,0.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.04) 1px,transparent 1px);
  background-size:60px 60px;
  opacity:0.5;
}
.hero-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:55% 45%;
  gap:40px;
  align-items:center;
  padding-top:60px;
  padding-bottom:60px;
  width:100%;
}
.hero-copy{max-width:600px}
.hero h1{
  font-size:var(--fs-hero);
  font-weight:800;
  line-height:1.15;
  color:#fff;
  letter-spacing:.01em;
  margin-bottom:16px;
  text-shadow:0 4px 30px rgba(0,0,0,0.5);
}
.hero-subtitle{
  font-size:1.25rem;
  color:var(--text);
  font-weight:500;
  margin-bottom:32px;
  letter-spacing:.02em;
}
.hero-subtitle span{color:var(--gold);font-weight:700}
.hero-actions{display:flex;gap:16px;margin-bottom:36px;flex-wrap:wrap}
.hero-trust{display:flex;gap:12px;flex-wrap:wrap}
.trust-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 14px;
  border-radius:var(--radius-pill);
  background:rgba(255,255,255,0.06);
  border:1px solid var(--line-2);
  font-size:var(--fs-small);
  color:var(--text-2);
  backdrop-filter:blur(8px);
}
.trust-badge svg{width:14px;height:14px;color:var(--cyan)}
/* Entry Card */
.hero-visual{display:flex;justify-content:flex-end;align-items:center}
.entry-card{
  width:100%;
  max-width:420px;
  border-radius:20px;
  padding:0;
  transform:rotate(1deg);
  border-color:rgba(255,255,255,0.15);
}
.entry-card-header{
  display:flex;
  align-items:center;
  gap:10px;
  padding:20px 24px;
  border-bottom:1px solid rgba(255,255,255,0.08);
}
.entry-dot{width:10px;height:10px;border-radius:50%;background:var(--gold);box-shadow:0 0 10px rgba(255,184,0,0.6)}
.entry-card-header h3{font-size:1.0625rem;font-weight:600;color:var(--text)}
.entry-card-body{padding:24px}
.entry-field{margin-bottom:16px}
.entry-field label{display:block;font-size:var(--fs-small);color:var(--text-2);margin-bottom:6px}
.entry-field input{
  width:100%;
  height:44px;
  padding:0 14px;
  border-radius:var(--radius-input);
  background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.10);
  color:var(--text);
  font-size:var(--fs-body);
  caret-color:var(--brand);
}
.entry-field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,111,255,0.15)}
.entry-secure{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  margin-top:16px;
  font-size:var(--fs-small);
  color:var(--text-2);
}
.entry-secure svg{width:14px;height:14px;color:var(--cyan)}
/* Pain Timeline */
.pain-section{
  background:rgba(0,0,0,0.25);
  position:relative;
}
.pain-timeline{max-width:680px;margin:0 auto;padding:0 20px}
.pain-item{
  display:flex;
  align-items:center;
  gap:24px;
  padding:20px 0;
  position:relative;
}
.pain-item:not(:last-child)::after{
  content:'';
  position:absolute;
  left:18px;
  top:calc(100% - 8px);
  width:1px;
  height:16px;
  background:linear-gradient(to bottom,var(--danger),transparent);
}
.pain-icon{
  width:38px;
  height:38px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(255,77,106,0.12);
  border:1px solid rgba(255,77,106,0.3);
  color:var(--danger);
  flex-shrink:0;
}
.pain-icon svg{width:18px;height:18px}
.pain-text{font-size:1.0625rem;color:var(--text);font-weight:500}
.pain-link{
  display:block;
  text-align:center;
  margin-top:32px;
  color:var(--brand);
  font-size:var(--fs-small);
  border-bottom:1px solid transparent;
  transition:border-color .25s;
  width:max-content;
  margin-left:auto;
  margin-right:auto;
}
.pain-link:hover{border-color:var(--brand)}
/* Solutions */
.solutions-section{position:relative}
.solution-grid{display:flex;flex-direction:column;gap:48px}
.solution-item{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
  background:var(--glass);
  border:1px solid var(--line-2);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:32px;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  backdrop-filter:blur(10px);
}
.solution-item:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(49,208,192,0.4);
}
.solution-item.reverse .solution-content{order:-1}
.solution-image{
  border-radius:12px;
  overflow:hidden;
  background:linear-gradient(135deg,rgba(31,111,255,0.2),rgba(255,184,0,0.1));
  aspect-ratio:16/10;
}
.solution-image img{width:100%;height:100%;object-fit:cover}
.solution-num{
  font-size:2.5rem;
  font-weight:200;
  color:var(--gold);
  display:block;
  line-height:1;
  margin-bottom:12px;
  border-bottom:1px solid rgba(255,184,0,0.3);
  padding-bottom:8px;
  display:inline-block;
}
.solution-content h3{font-size:1.25rem;font-weight:700;margin-bottom:10px;color:#fff}
.solution-content p{color:var(--text-2);line-height:1.7;font-size:0.9375rem}
/* Stats */
.stats-section{
  background:rgba(0,0,0,0.25);
  position:relative;
  overflow:hidden;
}
.stats-section::before{
  content:'';
  position:absolute;
  top:-120px;
  right:-80px;
  width:300px;
  height:300px;
  background:radial-gradient(circle,rgba(31,111,255,0.2),transparent 70%);
  pointer-events:none;
}
.stats-grid{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:40px;
  max-width:1000px;
  margin:0 auto;
}
.stat-item{
  flex:0 1 calc(33.333% - 40px);
  min-width:200px;
  text-align:center;
  padding:24px;
  background:rgba(255,255,255,0.03);
  border:1px solid rgba(255,255,255,0.06);
  border-radius:var(--radius);
  transition:transform .3s ease;
}
.stat-item:hover{transform:translateY(-4px)}
.stat-num{
  font-size:clamp(2rem,4vw,3rem);
  font-weight:700;
  color:var(--gold);
  font-variant-numeric:tabular-nums;
  line-height:1.3;
}
.stat-label{font-size:var(--fs-small);color:var(--text-2);margin-top:8px}
/* Testimonials */
.testimonial-section{position:relative}
.testimonial-wrap{max-width:720px;margin:0 auto;position:relative}
.testimonial-card{
  padding:40px 48px;
  text-align:center;
  position:relative;
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.10);
  border-radius:20px;
}
.testimonial-quote svg{width:48px;height:48px;color:rgba(31,111,255,0.6);margin:0 auto 20px;display:block}
.testimonial-text{font-size:1.125rem;line-height:1.6;color:var(--text);margin-bottom:24px}
.testimonial-name{font-weight:600;color:#fff;margin-bottom:4px}
.testimonial-role{font-size:var(--fs-small);color:var(--text-2);margin-bottom:12px}
.testimonial-stars{display:flex;gap:4px;justify-content:center;color:var(--gold);font-size:1rem}
.testimonial-stars svg{width:16px;height:16px}
.testimonial-dots{display:flex;justify-content:center;gap:8px;margin-top:20px}
.t-dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,0.2);transition:background .3s}
.t-dot.active{background:var(--brand)}
/* News List */
.news-section{position:relative}
.news-list{
  max-width:860px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  gap:16px;
}
.news-item{
  display:flex;
  align-items:center;
  gap:16px;
  padding:16px 20px;
  background:var(--glass);
  border:1px solid var(--line-2);
  border-radius:var(--radius);
  transition:background .3s ease,border-color .3s ease,transform .3s ease;
}
.news-item:hover{
  background:var(--glass-hover);
  border-color:rgba(31,111,255,0.4);
  transform:translateX(4px);
}
.news-item:hover .news-arrow{transform:translateX(4px);color:var(--brand)}
.news-tag{
  flex-shrink:0;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  background:rgba(31,111,255,0.12);
  border:1px solid rgba(31,111,255,0.3);
  color:var(--brand);
  font-size:var(--fs-small);
  font-weight:500;
  white-space:nowrap;
}
.news-title{
  font-weight:600;
  color:var(--text);
  font-size:var(--fs-body);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  flex:0 0 28%;
}
.news-item:hover .news-title{color:var(--brand)}
.news-summary{
  flex:1;
  color:var(--text-2);
  font-size:var(--fs-small);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  min-width:0;
}
.news-time{
  flex-shrink:0;
  color:var(--text-3);
  font-size:var(--fs-small);
  font-variant-numeric:tabular-nums;
}
.news-arrow{
  flex-shrink:0;
  color:var(--text-3);
  font-size:1.25rem;
  transition:transform .3s,color .3s;
}
.empty-state{
  text-align:center;
  padding:60px 20px;
  color:var(--text-2);
}
.empty-state svg{width:48px;height:48px;margin:0 auto 16px;opacity:0.4}
.empty-state p{font-size:var(--fs-body)}
/* FAQ */
.faq-section{
  background:rgba(0,0,0,0.25);
  position:relative;
}
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--glass);
  border:1px solid var(--line-2);
  border-radius:var(--radius);
  overflow:hidden;
  transition:border-color .3s ease;
}
.faq-item.active{border-color:rgba(31,111,255,0.4)}
.faq-question{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:56px;
  padding:0 20px;
  cursor:pointer;
  font-weight:500;
  color:var(--text);
  font-size:var(--fs-body);
  transition:background .3s;
  width:100%;
  text-align:left;
  background:transparent;
}
.faq-question:hover{background:rgba(255,255,255,0.03)}
.faq-icon{
  width:24px;
  height:24px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,0.2);
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  transition:transform .3s ease,background .3s,border-color .3s;
  font-size:1rem;
  color:var(--text-2);
}
.faq-item.active .faq-icon{
  transform:rotate(45deg);
  background:rgba(31,111,255,0.2);
  border-color:var(--brand);
  color:var(--brand);
}
.faq-answer{
  max-height:0;
  overflow:hidden;
  padding:0 20px;
  transition:max-height .3s ease,padding .3s ease;
  color:var(--text-2);
  font-size:0.9375rem;
  line-height:1.7;
}
.faq-item.active .faq-answer{
  max-height:300px;
  padding:0 20px 20px;
}
/* CTA */
.cta-section{
  position:relative;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  padding:80px 0;
  overflow:hidden;
}
.cta-section::before{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(5,10,30,0.92),rgba(10,21,53,0.85));
  z-index:1;
}
.cta-inner{
  position:relative;
  z-index:2;
  text-align:center;
  max-width:640px;
  margin:0 auto;
}
.cta-title{font-size:clamp(1.75rem,3vw,2.5rem);font-weight:800;color:#fff;margin-bottom:12px}
.cta-sub{color:var(--text-2);font-size:1rem;margin-bottom:32px}
.cta-actions{display:flex;justify-content:center;margin-bottom:20px;flex-wrap:wrap;gap:16px}
.cta-note{font-size:var(--fs-small);color:var(--text-3)}
.cta-note svg{width:14px;height:14px;vertical-align:-2px;color:var(--cyan);margin-right:4px}
/* Footer */
.site-footer{
  background:rgba(2,6,18,0.9);
  border-top:1px solid rgba(255,255,255,0.06);
  padding-top:60px;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:40px;
}
.footer-brand .logo{margin-bottom:16px}
.footer-desc{color:var(--text-3);font-size:0.875rem;max-width:280px;line-height:1.7}
.footer-col h4{
  font-size:0.9375rem;
  font-weight:600;
  color:var(--text);
  margin-bottom:16px;
}
.footer-col a{
  display:block;
  color:var(--text-2);
  font-size:0.875rem;
  padding:5px 0;
  transition:color .25s;
}
.footer-col a:hover{color:var(--gold)}
.footer-contact{color:var(--text-3);font-size:0.875rem;line-height:1.8}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.05);
  padding:20px 0;
  text-align:center;
  color:var(--text-3);
  font-size:0.8125rem;
}
/* Responsive */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr 1fr;gap:24px}
  .solution-item{grid-template-columns:1fr;padding:24px}
  .solution-item.reverse .solution-content{order:0}
  .solution-content{order:0}
  .solution-image{margin-bottom:8px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .news-title{flex:0 0 30%}
}
@media (max-width:768px){
  .search-form{display:none}
  .nav-pills{padding:8px 16px}
  .hero-inner{grid-template-columns:1fr;padding-top:48px;padding-bottom:48px}
  .hero-visual{justify-content:center;margin-top:24px}
  .entry-card{transform:none;max-width:100%}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%;justify-content:center}
  .solution-item{grid-template-columns:1fr;padding:20px}
  .stats-grid{gap:24px}
  .stat-item{flex:0 1 calc(50% - 24px);min-width:0}
  .news-item{flex-wrap:wrap}
  .news-tag{order:1}
  .news-title{flex:0 0 100%;order:2;margin-top:8px}
  .news-summary{flex:0 0 100%;order:3;margin-top:4px}
  .news-time{order:4;margin-left:auto}
  .news-arrow{order:5}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .testimonial-card{padding:28px 20px}
}
@media (max-width:640px){
  .container{padding:0 16px}
  .section{padding:var(--sp-section-mobile) 0}
  .section-head{margin-bottom:32px}
  .header-top{height:56px}
  .logo-text{font-size:1.0625rem}
  .header-cta{padding:0 14px;height:36px;font-size:0.8125rem}
  .nav-pills{gap:8px}
  .nav-pill{padding:0 16px;height:28px;font-size:0.8125rem}
  .hero-actions .btn{height:48px}
  .pain-item{gap:16px}
  .pain-text{font-size:0.9375rem}
  .stat-item{flex:0 0 100%}
  .cta-section{padding:60px 0}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%;justify-content:center}
  .footer-col{margin-bottom:8px}
}

/* roulang page: category1 */
:root {
  --bg-deep: #050A1E;
  --bg-body: #0A1535;
  --primary: #1F6FFF;
  --accent: #FFB800;
  --accent-2: #31D0C0;
  --text-main: #DCE4F5;
  --text-sub: #8A97B5;
  --text-muted: #5A678C;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-pill: 999px;
  --radius-input: 12px;
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
  --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 20px rgba(31, 111, 255, 0.15);
  --shadow-btn: 0 0 20px rgba(31, 111, 255, 0.4);
  --shadow-btn-hover: 0 0 34px rgba(31, 111, 255, 0.65), 0 4px 12px rgba(0, 0, 0, 0.3);
  --fs-hero: clamp(2.25rem, 4vw, 3.25rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.25rem);
  --fs-h3: 1.25rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --space-section: 80px;
  --space-section-mobile: 48px;
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-family);
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--text-main);
  background: linear-gradient(135deg, var(--bg-deep) 0%, var(--bg-body) 100%) fixed;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}
img {
  max-width: 100%;
  display: block;
}
button, input {
  font-family: inherit;
  font-size: inherit;
}
ul, ol {
  list-style: none;
}
:focus-visible {
  outline: 2px solid rgba(31, 111, 255, 0.6);
  outline-offset: 2px;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
section {
  padding: var(--space-section) 0;
}
@media (max-width: 640px) {
  section {
    padding: var(--space-section-mobile) 0;
  }
  .container {
    padding: 0 16px;
  }
}
/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-weight: 700;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, #1F6FFF, #31D0C0);
  color: #fff;
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn-hover);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 14px rgba(31, 111, 255, 0.3);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover {
  background: rgba(31, 111, 255, 0.12);
  border-color: rgba(31, 111, 255, 0.5);
  color: #fff;
}
.btn-lg {
  height: 56px;
  padding: 0 40px;
  font-size: 1.125rem;
}
.btn-sm {
  height: 38px;
  padding: 0 20px;
  font-size: 0.875rem;
}
/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 10, 30, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}
.header-top {
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.header-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-text {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-main);
  letter-spacing: 0.01em;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.search-form {
  position: relative;
  width: 220px;
  transition: width 0.3s ease;
}
.search-form:focus-within {
  width: 260px;
}
.search-form input {
  width: 100%;
  height: 42px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.06);
  padding: 0 44px 0 18px;
  color: var(--text-main);
  font-size: 0.875rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}
.search-form input::placeholder {
  color: #6B7A99;
}
.search-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(31, 111, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  outline: none;
}
.search-form button {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--text-sub);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, background 0.2s;
}
.search-form button:hover {
  color: #fff;
  background: rgba(31, 111, 255, 0.15);
}
.header-cta {
  flex-shrink: 0;
}
.header-nav {
  background: rgba(5, 10, 30, 0.5);
}
.nav-pills {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 24px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.nav-pills::-webkit-scrollbar {
  display: none;
}
.nav-pill {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 20px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid transparent;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-sub);
  white-space: nowrap;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}
.nav-pill:hover {
  background: rgba(255, 255, 255, 0.09);
  color: var(--text-main);
}
.nav-pill.active {
  background: linear-gradient(135deg, #1F6FFF, #31D0C0);
  color: #fff;
  box-shadow: 0 0 16px rgba(31, 111, 255, 0.35);
}
/* ===== Category Banner ===== */
.category-banner {
  position: relative;
  padding: 100px 0;
  background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  overflow: hidden;
}
.category-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(5, 10, 30, 0.93) 0%, rgba(10, 21, 53, 0.82) 50%, rgba(10, 21, 53, 0.6) 100%);
  z-index: 1;
}
.category-banner .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-small);
  color: var(--text-sub);
  margin-bottom: 20px;
}
.breadcrumb a {
  color: var(--text-sub);
}
.breadcrumb a:hover {
  color: var(--primary);
}
.category-banner h1 {
  font-size: var(--fs-hero);
  font-weight: 800;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: 0.01em;
  max-width: 700px;
}
.banner-sub {
  font-size: 1.125rem;
  color: var(--text-main);
  max-width: 640px;
  line-height: 1.6;
  margin-bottom: 32px;
  opacity: 0.9;
}
.banner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
/* ===== Category Intro ===== */
.category-intro {
  background: rgba(0, 0, 0, 0.2);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.category-intro .container {
  max-width: 900px;
  text-align: center;
}
.category-intro p {
  font-size: 1.0625rem;
  color: var(--text-main);
  line-height: 1.8;
  margin-bottom: 24px;
}
.intro-links {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: var(--fs-small);
  color: var(--text-sub);
}
.intro-links a {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(31, 111, 255, 0.12);
  border: 1px solid rgba(31, 111, 255, 0.3);
  color: var(--text-main);
  font-weight: 600;
  transition: background 0.25s, border-color 0.25s, color 0.25s;
}
.intro-links a:hover {
  background: rgba(31, 111, 255, 0.22);
  border-color: var(--primary);
  color: #fff;
}
/* ===== Split Main ===== */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 36px;
  align-items: start;
}
.featured-posts h2,
.key-points h2 {
  font-size: var(--fs-h2);
  font-weight: 700;
  margin-bottom: 28px;
  color: #fff;
  position: relative;
  padding-left: 16px;
}
.featured-posts h2::before,
.key-points h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 4px;
  height: 1em;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--primary), var(--accent-2));
}
.featured-card {
  display: flex;
  gap: 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 20px;
  margin-bottom: 20px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}
.featured-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-hover);
}
.featured-card img {
  width: 220px;
  height: 150px;
  object-fit: cover;
  border-radius: 12px;
  flex-shrink: 0;
}
.featured-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}
.tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 12px;
  border-radius: var(--radius-pill);
  background: rgba(49, 208, 192, 0.15);
  border: 1px solid rgba(49, 208, 192, 0.35);
  color: var(--accent-2);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.featured-body h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  transition: color 0.2s;
}
.featured-card:hover .featured-body h3 {
  color: var(--primary);
}
.featured-body p {
  font-size: var(--fs-small);
  color: var(--text-sub);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.featured-body time {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: auto;
}
/* Key points */
.key-points {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px;
}
.key-points ul {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.key-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: var(--fs-small);
  color: var(--text-main);
  line-height: 1.55;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  transition: background 0.25s, transform 0.25s;
}
.key-points li:hover {
  background: rgba(31, 111, 255, 0.1);
  transform: translateX(4px);
}
.key-points li::before {
  content: '';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none'%3E%3Ccircle cx='10' cy='10' r='8' stroke='%2331D0C0' stroke-width='1.5'/%3E%3Cpath d='M7 10l2 2 4-4' stroke='%2331D0C0' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E") center / contain no-repeat;
}
/* ===== Login Steps ===== */
.login-steps {
  background: rgba(0, 0, 0, 0.2);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.section-title {
  font-size: var(--fs-h2);
  font-weight: 700;
  color: #fff;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: 0.01em;
}
.section-subtitle {
  text-align: center;
  color: var(--text-sub);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.6;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 24px;
  text-align: center;
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(49, 208, 192, 0.4);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 200;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}
.step-card img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 16px;
}
.step-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.step-card p {
  font-size: var(--fs-small);
  color: var(--text-sub);
  line-height: 1.5;
}
/* ===== Scenarios ===== */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.scenario-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}
.scenario-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-hover);
}
.scenario-card:last-child {
  grid-column: 1 / -1;
  max-width: 700px;
  justify-self: center;
  text-align: center;
}
.scenario-card .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(31, 111, 255, 0.15);
  border: 1px solid rgba(31, 111, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}
.scenario-card:last-child .icon {
  margin: 0 auto;
}
.scenario-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
}
.scenario-card p {
  font-size: var(--fs-small);
  color: var(--text-sub);
  line-height: 1.6;
}
/* ===== FAQ ===== */
.faq-section {
  max-width: 760px;
  margin: 0 auto;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.faq-item[open] {
  border-color: rgba(31, 111, 255, 0.5);
  background: rgba(255, 255, 255, 0.07);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  padding: 0 20px;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-main);
  font-size: 0.95rem;
  list-style: none;
  user-select: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: '+';
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(31, 111, 255, 0.15);
  border: 1px solid rgba(31, 111, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.375rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-item summary:hover {
  color: #fff;
}
.faq-answer {
  padding: 0 20px 18px;
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.7;
  animation: faqFade 0.3s ease;
}
@keyframes faqFade {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 100px 0;
  text-align: center;
  background: url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(5, 10, 30, 0.92) 0%, rgba(31, 111, 255, 0.35) 50%, rgba(10, 21, 53, 0.9) 100%);
  z-index: 1;
}
.cta-section .container {
  position: relative;
  z-index: 2;
}
.cta-section h2 {
  font-size: var(--fs-h2);
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}
.cta-section p {
  font-size: 1.0625rem;
  color: var(--text-main);
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}
.cta-note {
  display: block;
  margin-top: 20px;
  font-size: 0.8125rem;
  color: var(--text-sub);
  letter-spacing: 0.03em;
}
/* ===== Footer ===== */
.site-footer {
  background: rgba(2, 6, 18, 0.9);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .logo {
  margin-bottom: 16px;
}
.footer-desc {
  font-size: var(--fs-small);
  color: var(--text-sub);
  line-height: 1.6;
  max-width: 240px;
}
.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}
.footer-col a {
  display: block;
  font-size: var(--fs-small);
  color: var(--text-sub);
  padding: 5px 0;
  transition: color 0.2s, transform 0.2s;
}
.footer-col a:hover {
  color: var(--accent);
  transform: translateX(4px);
}
.footer-contact p {
  font-size: var(--fs-small);
  color: var(--text-sub);
  padding: 4px 0;
  line-height: 1.5;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 20px 0;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
}
/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .split-layout {
    grid-template-columns: 1fr;
  }
  .key-points ul {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scenario-grid {
    grid-template-columns: 1fr;
  }
  .scenario-card:last-child {
    grid-column: auto;
    max-width: none;
    justify-self: stretch;
    text-align: left;
  }
  .scenario-card:last-child .icon {
    margin: 0;
  }
}
@media (max-width: 640px) {
  .header-top-inner {
    min-height: 60px;
  }
  .search-form {
    display: none;
  }
  .nav-pills {
    padding: 8px 16px;
  }
  .category-banner {
    padding: 64px 0;
  }
  .category-banner h1 {
    font-size: 1.9rem;
  }
  .banner-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .banner-actions .btn {
    width: 100%;
  }
  .featured-card {
    flex-direction: column;
    padding: 16px;
  }
  .featured-card img {
    width: 100%;
    height: 180px;
  }
  .key-points ul {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .scenario-card {
    padding: 24px;
  }
  .cta-section {
    padding: 64px 0;
  }
  .cta-section .btn-lg {
    width: 100%;
    max-width: 320px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-brand .logo {
    margin-bottom: 12px;
  }
  .intro-links {
    flex-direction: column;
  }
  .intro-links a {
    width: 100%;
    justify-content: center;
  }
}

/* roulang page: article */
/* ==========================================
   hth华体登录入口 文章详情页 视觉系统
   ========================================== */
:root {
  --bg-deep: #050A1E;
  --bg-dark: #0A1535;
  --bg-overlay: #070E26;
  --primary: #1F6FFF;
  --primary-soft: rgba(31, 111, 255, 0.12);
  --primary-glow: rgba(31, 111, 255, 0.35);
  --gold: #FFB800;
  --teal: #31D0C0;
  --teal-soft: rgba(49, 208, 192, 0.12);
  --text-main: #DCE4F5;
  --text-secondary: #8A97B5;
  --text-muted: #5A678C;
  --danger: #FF4D6A;
  --border: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.12);
  --card-bg: rgba(255, 255, 255, 0.04);
  --glass-bg: rgba(255, 255, 255, 0.05);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-pill: 999px;
  --radius-input: 12px;
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
  --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 20px rgba(31, 111, 255, 0.15);
  --shadow-glow: 0 0 20px rgba(31, 111, 255, 0.4);
  --container: 1200px;
  --space-section: 80px;
  --space-mobile: 48px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(160deg, rgba(5, 10, 30, 0.96), rgba(10, 21, 53, 0.92)), url('/assets/images/backpic/back-1.webp') center/cover fixed no-repeat;
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

a {
  color: inherit;
}

button {
  font-family: inherit;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: .9375rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .3s ease, border-color .3s ease;
  outline: none;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid rgba(31, 111, 255, 0.6);
  outline-offset: 2px;
}

.btn-sm {
  height: 38px;
  padding: 0 20px;
  font-size: .875rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--teal));
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 34px rgba(31, 111, 255, 0.65), 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 14px rgba(31, 111, 255, 0.35);
}

/* ========== 双层导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 10, 30, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow .3s ease;
}

.site-header.scrolled {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.header-top {
  height: 64px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.header-top-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: .02em;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.search-form {
  position: relative;
  width: 220px;
  transition: width .3s ease;
}

.search-form input {
  width: 100%;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  padding: 0 42px 0 16px;
  font-size: .875rem;
  outline: none;
  transition: border-color .3s, box-shadow .3s, background .3s;
}

.search-form input::placeholder {
  color: #6B7A99;
}

.search-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(31, 111, 255, 0.2);
  background: rgba(255, 255, 255, 0.09);
}

.search-form button {
  position: absolute;
  right: 4px;
  top: 4px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color .3s, background .3s;
}

.search-form button:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.search-form:focus-within {
  width: 260px;
}

.header-nav {
  height: 48px;
}

.nav-pills {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 48px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.nav-pills::-webkit-scrollbar {
  display: none;
}

.nav-pill {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 20px;
  border-radius: var(--radius-pill);
  font-size: .875rem;
  color: var(--text-secondary);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: all .25s ease;
}

.nav-pill:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.nav-pill.active {
  background: linear-gradient(135deg, var(--primary), var(--teal));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 16px rgba(31, 111, 255, 0.3);
}

/* ========== 面包屑 ========== */
.breadcrumb-wrap {
  padding-top: 32px;
  padding-bottom: 8px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .875rem;
  color: var(--text-secondary);
}

.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color .2s;
}

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

.breadcrumb .sep {
  color: var(--text-muted);
  font-size: .75rem;
}

.breadcrumb .current {
  color: var(--text-main);
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========== 文章主体 ========== */
.article-main {
  padding-bottom: var(--space-section);
}

.article-wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 24px 0;
}

.article-header {
  position: relative;
  text-align: center;
  padding: 48px 0 40px;
  border-radius: 24px;
  overflow: hidden;
}

.article-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity: .16;
  z-index: 0;
  border-radius: 24px;
}

.article-header::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 10, 30, 0.85), rgba(7, 14, 38, 0.95));
  z-index: 1;
  border-radius: 24px;
}

.article-header > * {
  position: relative;
  z-index: 2;
}

.article-category {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  background: var(--teal-soft);
  color: var(--teal);
  font-size: .8125rem;
  font-weight: 500;
  border: 1px solid rgba(49, 208, 192, 0.25);
  margin-bottom: 20px;
  text-decoration: none;
  transition: all .25s ease;
}

.article-category:hover {
  background: rgba(49, 208, 192, 0.2);
  color: #fff;
  border-color: rgba(49, 208, 192, 0.5);
}

.article-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  color: #fff;
  letter-spacing: .01em;
  margin-bottom: 16px;
  text-wrap: balance;
}

.article-summary {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 680px;
  margin: 0 auto 24px;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-size: .875rem;
  color: var(--text-muted);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-item svg {
  width: 15px;
  height: 15px;
  opacity: .7;
}

/* ========== 正文排版 ========== */
.article-body {
  max-width: 760px;
  margin: 48px auto 0;
  font-size: 1rem;
  line-height: 1.75;
  color: #C7D0E5;
  letter-spacing: .02em;
}

.article-body > * + * {
  margin-top: 1.5em;
}

.article-body h2 {
  font-size: 1.5rem;
  color: #fff;
  font-weight: 700;
  margin-top: 2em;
  margin-bottom: .8em;
  line-height: 1.3;
  padding-bottom: .4em;
  border-bottom: 1px solid var(--border);
}

.article-body h3 {
  font-size: 1.25rem;
  color: #fff;
  font-weight: 600;
  margin-top: 1.8em;
  margin-bottom: .6em;
  line-height: 1.4;
}

.article-body p {
  margin-bottom: 1.5em;
}

.article-body a {
  color: var(--primary);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 111, 255, 0.3);
  transition: border-color .2s, color .2s;
}

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

.article-body img {
  max-width: 100%;
  border-radius: 12px;
  margin: 2em auto;
  box-shadow: var(--shadow-card);
}

.article-body blockquote {
  border-left: 4px solid var(--gold);
  padding: 16px 24px;
  background: rgba(255, 184, 0, 0.06);
  border-radius: 0 12px 12px 0;
  color: var(--text-secondary);
  margin: 2em 0;
}

.article-body ul,
.article-body ol {
  padding-left: 1.5em;
  margin-bottom: 1.5em;
}

.article-body li {
  margin-bottom: .5em;
}

.article-body li::marker {
  color: var(--primary);
}

.article-body code {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: .9em;
  font-family: "SF Mono", "Consolas", monospace;
}

.article-body pre {
  background: rgba(2, 6, 18, 0.85);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  overflow-x: auto;
  margin: 2em 0;
}

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

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 2em 0;
  border-radius: 12px;
  overflow: hidden;
  font-size: .9375rem;
}

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

.article-body th {
  background: rgba(255, 255, 255, 0.04);
  color: #fff;
  font-weight: 600;
}

.article-body tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

.article-body hr {
  border: none;
  height: 1px;
  background: var(--border);
  margin: 2em 0;
}

/* ========== 文章底部：标签/分享 ========== */
.article-footer {
  max-width: 760px;
  margin: 48px auto 0;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  height: 30px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: .8125rem;
  text-decoration: none;
  transition: all .25s ease;
}

.tag:hover {
  background: var(--primary-soft);
  color: #fff;
  border-color: rgba(31, 111, 255, 0.4);
}

.article-share {
  display: flex;
  align-items: center;
  gap: 8px;
}

.share-label {
  font-size: .8125rem;
  color: var(--text-muted);
  margin-right: 4px;
}

.share-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all .25s ease;
  text-decoration: none;
}

.share-btn:hover {
  background: var(--primary-soft);
  color: #fff;
  border-color: rgba(31, 111, 255, 0.4);
  transform: translateY(-2px);
}

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

.share-btn svg {
  width: 16px;
  height: 16px;
}

/* ========== 相关推荐 ========== */
.related-section {
  max-width: var(--container);
  margin: 80px auto 0;
  padding: 0 24px;
}

.related-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
}

.related-head h2 {
  font-size: clamp(1.375rem, 3vw, 1.875rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: .01em;
}

.related-head::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border-light), transparent);
}

.related-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.related-card {
  width: 340px;
  max-width: 100%;
  border-radius: var(--radius-card);
  background: var(--card-bg);
  border: 1px solid var(--border);
  overflow: hidden;
  text-decoration: none;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  display: block;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(49, 208, 192, 0.4);
}

.related-card:focus-visible {
  outline: 2px solid rgba(31, 111, 255, 0.6);
  outline-offset: 2px;
}

.card-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: linear-gradient(135deg, rgba(31, 111, 255, 0.25), rgba(49, 208, 192, 0.1));
}

.related-card-info {
  padding: 20px;
}

.related-card-title {
  color: #fff;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 10px;
  transition: color .2s ease;
}

.related-card:hover .related-card-title {
  color: var(--primary);
}

.related-card-time {
  font-size: .8125rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.related-card-time svg {
  width: 14px;
  height: 14px;
}

/* ========== CTA 区块 ========== */
.article-cta {
  max-width: var(--container);
  margin: 80px auto 0;
  padding: 64px 24px;
  text-align: center;
  position: relative;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(31, 111, 255, 0.18), rgba(49, 208, 192, 0.1)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  border: 1px solid var(--border-light);
  overflow: hidden;
}

.article-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 10, 30, 0.5), rgba(5, 10, 30, 0.82));
}

.article-cta > * {
  position: relative;
  z-index: 1;
}

.article-cta h2 {
  color: #fff;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: .01em;
}

.article-cta p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 460px;
  margin-left: auto;
  margin-right: auto;
}

.article-cta .btn {
  height: 56px;
  padding: 0 44px;
  font-size: 1.0625rem;
  border-radius: var(--radius-btn);
}

.cta-safe {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: .8125rem;
  color: var(--text-muted);
}

.cta-safe svg {
  width: 14px;
  height: 14px;
  color: var(--teal);
}

/* ========== 返回链接 ========== */
.article-back {
  max-width: 760px;
  margin: 32px auto 0;
  padding: 0 24px;
  display: flex;
  justify-content: center;
  gap: 28px;
  font-size: .875rem;
}

.article-back a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color .2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

.article-back a svg {
  width: 14px;
  height: 14px;
}

/* ========== 内容未找到 ========== */
.article-notfound {
  min-height: 55vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px;
  gap: 16px;
}

.notfound-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.notfound-icon svg {
  width: 32px;
  height: 32px;
}

.article-notfound h1 {
  font-size: 2rem;
  color: #fff;
  font-weight: 700;
}

.article-notfound p {
  color: var(--text-secondary);
  max-width: 380px;
}

.article-notfound .btn {
  margin-top: 12px;
}

/* ========== 页脚 ========== */
.site-footer {
  background: rgba(2, 6, 18, 0.92);
  border-top: 1px solid var(--border-light);
  margin-top: 80px;
  padding: 56px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-desc {
  color: var(--text-secondary);
  font-size: .875rem;
  line-height: 1.6;
  margin-top: 12px;
  max-width: 260px;
}

.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: .02em;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: .875rem;
  padding: 6px 0;
  transition: color .2s;
}

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

.footer-contact p {
  color: var(--text-secondary);
  font-size: .875rem;
  line-height: 1.6;
  padding: 4px 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: .8125rem;
  letter-spacing: .02em;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .search-form {
    width: 140px;
  }

  .search-form:focus-within {
    width: 180px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .related-grid {
    gap: 20px;
  }

  .related-card {
    width: calc(50% - 10px);
  }
}

@media (max-width: 768px) {
  .header-top-inner {
    flex-wrap: nowrap;
  }

  .header-actions .search-form {
    display: none;
  }

  .header-actions {
    gap: 8px;
  }

  .nav-pills {
    padding: 0 16px;
    gap: 6px;
  }

  .article-wrap {
    padding: 0 16px;
  }

  .article-header {
    padding: 40px 16px 32px;
    border-radius: 16px;
  }

  .article-header h1 {
    font-size: 1.5rem;
  }

  .article-summary {
    font-size: .9375rem;
  }

  .article-body {
    margin-top: 32px;
  }

  .related-grid {
    flex-direction: column;
  }

  .related-card {
    width: 100%;
  }

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

  .article-cta {
    margin-top: 48px;
    padding: 48px 16px;
  }

  .site-footer {
    margin-top: 48px;
  }

  .article-back {
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding-bottom: 24px;
  }
}

@media (max-width: 520px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .logo-text {
    font-size: 1.0625rem;
  }

  .header-cta {
    padding: 0 14px;
    font-size: .8125rem;
  }

  .header-top {
    height: 60px;
  }

  .header-top-inner {
    height: 60px;
  }

  .breadcrumb-wrap {
    padding-top: 20px;
  }

  .breadcrumb .current {
    max-width: 160px;
  }

  .article-wrap {
    padding: 0 16px;
  }

  .article-header h1 {
    font-size: 1.375rem;
  }

  .article-meta {
    gap: 8px 16px;
    font-size: .8125rem;
  }

  .article-body {
    font-size: .95rem;
  }

  .article-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .related-section {
    padding: 0 16px;
  }

  .article-cta h2 {
    font-size: 1.375rem;
  }

  .article-cta .btn {
    width: 100%;
    max-width: 320px;
  }

  .footer-grid {
    gap: 24px;
  }

  .footer-bottom {
    padding-top: 20px;
  }
}

/* roulang page: category2 */
:root {
            --bg-deep: #050A1E;
            --bg-body: #0A1535;
            --primary: #1F6FFF;
            --primary-light: #4D8DFF;
            --accent: #FFB800;
            --mint: #31D0C0;
            --danger: #FF4D6A;
            --text: #DCE4F5;
            --text-muted: #8A97B5;
            --text-dim: #5A678C;
            --card-bg: rgba(255, 255, 255, 0.05);
            --card-border: rgba(255, 255, 255, 0.12);
            --input-bg: rgba(255, 255, 255, 0.06);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-pill: 999px;
            --radius-input: 12px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 20px rgba(31, 111, 255, 0.15);
            --shadow-btn: 0 0 20px rgba(31, 111, 255, 0.4);
            --shadow-btn-hover: 0 0 34px rgba(31, 111, 255, 0.65), 0 4px 12px rgba(0, 0, 0, 0.3);
            --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            --fs-hero: clamp(2rem, 4.5vw, 3rem);
            --fs-h2: clamp(1.5rem, 3vw, 2.25rem);
            --fs-h3: 1.25rem;
            --fs-body: 1rem;
            --fs-small: 0.875rem;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: linear-gradient(160deg, var(--bg-deep) 0%, var(--bg-body) 50%, #0D1B45 100%);
            background-attachment: fixed;
            color: var(--text);
            line-height: 1.75;
            font-size: var(--fs-body);
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            display: block;
            border-radius: 12px;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color .25s ease;
        }

        a:hover {
            color: var(--mint);
        }

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul {
            list-style: none;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 46px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.9375rem;
            line-height: 1;
            transition: all .3s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--mint));
            color: #fff;
            box-shadow: var(--shadow-btn);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-btn-hover);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(31, 111, 255, 0.3);
        }

        .btn-outline {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text);
            backdrop-filter: blur(8px);
        }

        .btn-outline:hover {
            background: rgba(31, 111, 255, 0.12);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

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

        .btn-sm {
            height: 38px;
            padding: 0 18px;
            font-size: 0.875rem;
        }

        .btn-lg {
            height: 56px;
            padding: 0 40px;
            font-size: 1.0625rem;
            border-radius: 12px;
        }

        .btn:focus-visible {
            outline: 2px solid rgba(31, 111, 255, 0.7);
            outline-offset: 2px;
        }

        .section {
            padding: 80px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--mint);
            text-transform: uppercase;
            margin-bottom: 12px;
            padding: 4px 14px;
            border: 1px solid rgba(49, 208, 192, 0.3);
            border-radius: var(--radius-pill);
            background: rgba(49, 208, 192, 0.08);
        }

        .section-title {
            font-size: var(--fs-h2);
            font-weight: 700;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .section-desc {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 640px;
            margin-bottom: 40px;
            line-height: 1.7;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(5, 10, 30, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: box-shadow .3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
        }

        .header-top {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .header-top-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 20px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            color: #fff;
            font-size: 1.25rem;
        }

        .logo:hover {
            color: #fff;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .logo-text {
            letter-spacing: 0.01em;
            white-space: nowrap;
        }

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

        .search-form {
            display: flex;
            align-items: center;
            background: var(--input-bg);
            border: 1px solid transparent;
            border-radius: var(--radius-pill);
            height: 40px;
            padding: 0 6px 0 16px;
            width: 220px;
            transition: all .3s ease;
        }

        .search-form:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(31, 111, 255, 0.2);
            width: 260px;
            background: rgba(255, 255, 255, 0.09);
        }

        .search-form input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            color: var(--text);
            font-size: 0.875rem;
            height: 36px;
        }

        .search-form input::placeholder {
            color: #6B7A99;
        }

        .search-form button {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            color: var(--text-muted);
            transition: color .2s;
            flex-shrink: 0;
        }

        .search-form button:hover {
            color: #fff;
        }

        .header-cta {
            height: 38px;
            padding: 0 22px;
        }

        .header-nav {
            position: relative;
            height: 48px;
            display: flex;
            align-items: center;
        }

        .nav-pills {
            display: flex;
            align-items: center;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            height: 48px;
        }

        .nav-pills::-webkit-scrollbar {
            display: none;
        }

        .nav-pill {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 32px;
            padding: 0 20px;
            border-radius: var(--radius-pill);
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all .25s ease;
            white-space: nowrap;
        }

        .nav-pill:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.16);
        }

        .nav-pill.active {
            background: linear-gradient(135deg, var(--primary), #3D7BFF);
            color: #fff;
            border-color: transparent;
            box-shadow: 0 0 16px rgba(31, 111, 255, 0.35);
            font-weight: 600;
        }

        .nav-pill:focus-visible {
            outline: 2px solid rgba(31, 111, 255, 0.6);
            outline-offset: 2px;
        }

        /* ===== Banner ===== */
        .category-banner {
            position: relative;
            padding: 80px 0 72px;
            background: linear-gradient(105deg, rgba(5, 10, 30, 0.94) 20%, rgba(10, 21, 53, 0.72) 60%, rgba(13, 27, 69, 0.55) 100%), url('/assets/images/backpic/back-2.webp') center/cover;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            overflow: hidden;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 44px 44px;
            pointer-events: none;
        }

        .category-banner .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 48px;
            align-items: center;
        }

        .breadcrumb {
            font-size: 0.8125rem;
            color: var(--text-dim);
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color .2s;
        }

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

        .breadcrumb .sep {
            color: var(--text-dim);
            opacity: 0.6;
        }

        .breadcrumb .cur {
            color: var(--text);
            font-weight: 500;
        }

        .banner-title {
            font-size: var(--fs-hero);
            font-weight: 800;
            line-height: 1.15;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .banner-title .highlight {
            color: var(--accent);
        }

        .banner-sub {
            color: var(--text-muted);
            font-size: 1.0625rem;
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 520px;
        }

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

        .banner-trust {
            display: flex;
            align-items: center;
            gap: 18px;
            margin-top: 30px;
            flex-wrap: wrap;
        }

        .trust-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8125rem;
            color: var(--text-muted);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .trust-item .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--mint);
            box-shadow: 0 0 8px rgba(49, 208, 192, 0.6);
        }

        .safe-panel {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 20px;
            backdrop-filter: blur(12px);
            padding: 36px 32px;
            position: relative;
            box-shadow: var(--shadow-card);
            transform: rotate(1deg);
            transition: transform .3s ease;
        }

        .safe-panel:hover {
            transform: rotate(0deg) translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .safe-panel::after {
            content: '';
            position: absolute;
            top: 0;
            left: 8%;
            right: 8%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
        }

        .safe-panel-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 24px;
        }

        .safe-panel-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(49, 208, 192, 0.2), rgba(31, 111, 255, 0.2));
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(49, 208, 192, 0.3);
            flex-shrink: 0;
        }

        .safe-panel-status {
            font-weight: 600;
            font-size: 0.9375rem;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--mint);
            box-shadow: 0 0 10px rgba(49, 208, 192, 0.7);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.7; transform: scale(0.92); }
        }

        .safe-checks {
            margin: 20px 0 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .safe-check-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        .safe-check-item svg {
            flex-shrink: 0;
            color: var(--mint);
        }

        .btn-block {
            width: 100%;
        }

        /* ===== Points / 卖点 ===== */
        .points-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 24px;
        }

        .point-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            position: relative;
            transition: all .3s ease;
            overflow: hidden;
        }

        .point-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--mint));
            opacity: 0;
            transition: opacity .3s;
        }

        .point-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(49, 208, 192, 0.35);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

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

        .point-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(31, 111, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            border: 1px solid rgba(31, 111, 255, 0.25);
        }

        .point-card h3 {
            font-size: 1.125rem;
            color: #fff;
            margin-bottom: 8px;
            font-weight: 700;
        }

        .point-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .points-full {
            background: linear-gradient(120deg, rgba(31, 111, 255, 0.08), rgba(49, 208, 192, 0.06));
            border: 1px solid rgba(31, 111, 255, 0.2);
            border-radius: var(--radius-card);
            padding: 28px 32px;
            display: flex;
            align-items: center;
            gap: 24px;
            transition: all .3s ease;
        }

        .points-full:hover {
            border-color: rgba(49, 208, 192, 0.4);
            box-shadow: var(--shadow-hover);
        }

        .points-full .point-icon {
            margin-bottom: 0;
            flex-shrink: 0;
        }

        .points-full-content h3 {
            color: #fff;
            font-size: 1.0625rem;
            margin-bottom: 4px;
        }

        .points-full-content p {
            color: var(--text-muted);
            font-size: 0.875rem;
            line-height: 1.6;
        }

        /* ===== Scenes ===== */
        .scenes-section {
            background: rgba(5, 10, 30, 0.45);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

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

        .scene-card {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            min-height: 300px;
            display: flex;
            align-items: flex-end;
            transition: all .4s ease;
        }

        .scene-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform .5s ease;
        }

        .scene-card::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(185deg, rgba(5, 10, 30, 0.15) 30%, rgba(5, 10, 30, 0.92) 82%);
            transition: background .3s;
        }

        .scene-card:hover img {
            transform: scale(1.04);
        }

        .scene-card-content {
            position: relative;
            z-index: 2;
            padding: 28px;
            width: 100%;
        }

        .scene-card-content h3 {
            color: #fff;
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .scene-card-content p {
            color: rgba(220, 228, 245, 0.75);
            font-size: 0.875rem;
            line-height: 1.6;
        }

        .scene-tag {
            display: inline-block;
            font-size: 0.75rem;
            color: var(--mint);
            background: rgba(49, 208, 192, 0.15);
            border: 1px solid rgba(49, 208, 192, 0.25);
            padding: 2px 10px;
            border-radius: var(--radius-pill);
            margin-bottom: 10px;
        }

        /* ===== Steps ===== */
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            max-width: 860px;
            margin: 0 auto;
            position: relative;
        }

        .steps-list::before {
            content: '';
            position: absolute;
            top: 24px;
            bottom: 24px;
            left: 28px;
            width: 2px;
            background: linear-gradient(180deg, var(--primary), var(--mint));
            opacity: 0.25;
            border-radius: 2px;
        }

        .step-item {
            display: flex;
            gap: 24px;
            padding: 24px 0;
            align-items: flex-start;
            position: relative;
        }

        .step-num {
            width: 58px;
            height: 58px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(31, 111, 255, 0.25), rgba(255, 184, 0, 0.12));
            border: 1px solid rgba(31, 111, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent);
            flex-shrink: 0;
            position: relative;
            z-index: 1;
            backdrop-filter: blur(8px);
            transition: all .3s ease;
        }

        .step-item:hover .step-num {
            border-color: var(--accent);
            box-shadow: 0 0 20px rgba(255, 184, 0, 0.2);
        }

        .step-body {
            padding-top: 6px;
        }

        .step-body h3 {
            color: #fff;
            font-size: 1.125rem;
            margin-bottom: 6px;
            font-weight: 700;
        }

        .step-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.65;
        }

        /* ===== Tips ===== */
        .tips-section {
            background: linear-gradient(180deg, rgba(5, 10, 30, 0.6), rgba(10, 21, 53, 0.3));
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .tips-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .tips-visual {
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--card-border);
            box-shadow: var(--shadow-card);
        }

        .tips-visual img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            border-radius: 0;
        }

        .tips-list {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 18px 20px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: 14px;
            transition: all .3s ease;
        }

        .tip-item:hover {
            border-color: rgba(255, 184, 0, 0.3);
            background: rgba(255, 255, 255, 0.07);
            transform: translateX(4px);
        }

        .tip-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 184, 0, 0.12);
            border: 1px solid rgba(255, 184, 0, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            flex-shrink: 0;
        }

        .tip-text {
            font-size: 0.9rem;
            color: var(--text);
            line-height: 1.55;
        }

        .tip-text strong {
            color: #fff;
            display: block;
            margin-bottom: 2px;
            font-size: 0.95rem;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: 14px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .3s ease;
        }

        .faq-item.open {
            border-color: rgba(31, 111, 255, 0.4);
            background: rgba(255, 255, 255, 0.07);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            text-align: left;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            min-height: 56px;
            transition: background .25s;
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.04);
        }

        .faq-icon {
            position: relative;
            width: 22px;
            height: 22px;
            flex-shrink: 0;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--primary-light);
            border-radius: 2px;
            transition: all .3s ease;
        }

        .faq-icon::before {
            width: 16px;
            height: 2px;
            top: 10px;
            left: 3px;
        }

        .faq-icon::after {
            width: 2px;
            height: 16px;
            top: 3px;
            left: 10px;
        }

        .faq-item.open .faq-icon::after {
            transform: scaleY(0);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 90px 0;
            background: linear-gradient(120deg, rgba(31, 111, 255, 0.85), rgba(49, 208, 192, 0.65)), url('/assets/images/backpic/back-3.png') center/cover;
            text-align: center;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(5, 10, 30, 0.55);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: rgba(255, 184, 0, 0.15);
            filter: blur(80px);
            top: -80px;
            right: -60px;
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            color: #fff;
            font-size: var(--fs-h2);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 12px;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1rem;
            margin-bottom: 32px;
        }

        .cta-note {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 20px;
            padding: 5px 14px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .cta-note .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--mint);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: rgba(2, 6, 18, 0.9);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .logo-text {
            font-size: 1.125rem;
        }

        .footer-desc {
            color: var(--text-dim);
            font-size: 0.875rem;
            margin-top: 14px;
            line-height: 1.6;
            max-width: 240px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 0.9375rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 0.875rem;
            line-height: 2.2;
            transition: color .2s;
        }

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

        .footer-contact p {
            color: var(--text-dim);
            font-size: 0.8125rem;
            line-height: 1.8;
            margin-bottom: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 20px 0;
            text-align: center;
            color: var(--text-dim);
            font-size: 0.8125rem;
        }

        /* ===== Focus ===== */
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid rgba(31, 111, 255, 0.6);
            outline-offset: 2px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .category-banner .container {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .safe-panel {
                max-width: 480px;
            }

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

            .tips-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }

            .header-top-inner {
                height: 60px;
            }

            .search-form {
                display: none;
            }

            .nav-pills {
                height: 48px;
            }

            .category-banner {
                padding: 56px 0 48px;
            }

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

            .points-full {
                flex-direction: column;
                align-items: flex-start;
                padding: 24px;
            }

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

            .scene-card {
                min-height: 240px;
            }

            .cta-section {
                padding: 64px 0;
            }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .header-cta {
                display: none;
            }

            .logo-text {
                font-size: 1.0625rem;
            }

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

            .banner-actions .btn {
                width: 100%;
            }

            .safe-panel {
                padding: 24px 20px;
            }

            .step-item {
                gap: 16px;
            }

            .step-num {
                width: 48px;
                height: 48px;
                font-size: 1.25rem;
                border-radius: 12px;
            }

            .steps-list::before {
                left: 23px;
            }
        }

/* roulang page: category3 */
:root {
  --bg-deep: #050A1E;
  --bg-body: #0A1535;
  --primary: #1F6FFF;
  --primary-light: #3B82FF;
  --accent: #FFB800;
  --cyan: #31D0C0;
  --text: #DCE4F5;
  --text-sub: #8A97B5;
  --text-mute: #5A678C;
  --danger: #FF4D6A;
  --glass-bg: rgba(255,255,255,0.05);
  --glass-border: rgba(255,255,255,0.12);
  --glass-highlight: inset 0 1px 0 rgba(255,255,255,0.08);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-pill: 999px;
  --radius-input: 12px;
  --shadow-card: 0 10px 30px rgba(0,0,0,0.25), inset 0 0 0 1px rgba(255,255,255,0.06);
  --shadow-hover: 0 16px 40px rgba(0,0,0,0.35), 0 0 20px rgba(31,111,255,0.15);
  --shadow-btn: 0 0 20px rgba(31,111,255,0.4);
  --shadow-btn-hover: 0 0 34px rgba(31,111,255,0.65), 0 4px 12px rgba(0,0,0,0.3);
  --transition: 0.3s ease;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-body) 100%);
  background-attachment: fixed;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: 0.02em;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--cyan);
}

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

button {
  cursor: pointer;
}

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

/* ======== 双层导航 ======== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5,10,30,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.header-top {
  height: 64px;
}

.header-top-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

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

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 10px rgba(31,111,255,0.4));
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  background: linear-gradient(135deg, #fff 0%, #DCE4F5 60%, #31D0C0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-form {
  position: relative;
  width: 220px;
  transition: width 0.3s ease;
}

.search-form:focus-within {
  width: 260px;
}

.search-form input {
  width: 100%;
  height: 40px;
  padding: 0 40px 0 16px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text);
  font-size: 0.875rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.search-form input::placeholder {
  color: #6B7A99;
}

.search-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(31,111,255,0.2);
}

.search-form button {
  position: absolute;
  right: 4px;
  top: 4px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-sub);
  border-radius: 50%;
  transition: color 0.3s, background 0.3s;
}

.search-form button:hover {
  color: var(--cyan);
  background: rgba(255,255,255,0.08);
}

.header-cta {
  height: 40px;
  padding: 0 20px;
  white-space: nowrap;
}

.header-nav {
  height: 48px;
  border-top: 1px solid rgba(255,255,255,0.04);
  position: relative;
}

.nav-pills {
  height: 48px;
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.nav-pills::-webkit-scrollbar {
  display: none;
}

.nav-pill {
  flex-shrink: 0;
  height: 32px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--glass-bg);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-sub);
  font-size: 0.875rem;
  font-weight: 500;
  backdrop-filter: blur(8px);
  transition: all var(--transition);
  white-space: nowrap;
}

.nav-pill:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text);
  transform: translateY(-1px);
}

.nav-pill.active {
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 16px rgba(31,111,255,0.35);
  font-weight: 600;
}

/* ======== 按钮 ======== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid rgba(31,111,255,0.6);
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  color: #fff;
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn-hover);
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 0 10px rgba(31,111,255,0.3);
}

.btn-secondary {
  background: var(--glass-bg);
  border-color: rgba(255,255,255,0.2);
  color: var(--text);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(31,111,255,0.12);
  border-color: var(--primary);
  color: var(--text);
  transform: translateY(-2px);
}

.btn-sm {
  height: 40px;
  padding: 0 18px;
  font-size: 0.875rem;
}

.btn-lg {
  height: 56px;
  padding: 0 36px;
  font-size: 1.0625rem;
}

.btn-gold {
  background: linear-gradient(135deg, var(--accent), #FF9500);
  color: #0A0F1E;
  box-shadow: 0 0 24px rgba(255,184,0,0.3);
}

.btn-gold:hover {
  color: #0A0F1E;
  transform: translateY(-2px);
  box-shadow: 0 0 36px rgba(255,184,0,0.5);
}

/* ======== 分类横幅 ======== */
.category-banner {
  position: relative;
  padding: 90px 0 70px;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.category-banner::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(110deg, rgba(5,10,30,0.92) 0%, rgba(10,21,53,0.78) 60%, rgba(10,21,53,0.6) 100%);
}

.category-banner::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.4;
}

.category-banner .container {
  position: relative;
  z-index: 2;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-sub);
  margin-bottom: 20px;
}

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

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

.breadcrumb span {
  color: var(--text-mute);
}

.category-banner h1 {
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: 0.01em;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.category-banner .banner-desc {
  max-width: 680px;
  color: #AEB9D6;
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 28px;
}

.banner-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--text);
  font-size: 0.8125rem;
  backdrop-filter: blur(8px);
}

.badge-gold {
  color: var(--accent);
  border-color: rgba(255,184,0,0.3);
  background: rgba(255,184,0,0.08);
}

/* ======== 分类介绍 ======== */
.intro-section {
  padding: 80px 0;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.intro-content h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
}

.intro-content p {
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 16px;
}

.intro-content .intro-links {
  display: flex;
  gap: 16px;
  margin-top: 24px;
}

.intro-visual {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
  padding: 32px;
}

.intro-visual h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: #fff;
}

.tip-tag-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tip-tag-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 0.9375rem;
}

.tip-tag-item .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
}

.tip-tag-item .dot.gold {
  background: var(--accent);
}

.tip-tag-item .dot.cyan {
  background: var(--cyan);
}

/* ======== 精选内容两栏 ======== */
.feature-section {
  padding: 0 0 80px;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: start;
}

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

.section-heading h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 8px;
}

.section-heading p {
  color: var(--text-sub);
  font-size: 0.9375rem;
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.article-card {
  display: flex;
  gap: 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  padding: 16px;
  transition: all var(--transition);
  cursor: pointer;
  backdrop-filter: blur(8px);
}

.article-card:hover {
  background: rgba(255,255,255,0.09);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.article-card .card-pic {
  width: 180px;
  min-width: 180px;
  height: 120px;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, rgba(31,111,255,0.3), rgba(49,208,192,0.2));
}

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

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

.card-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex: 1;
  min-width: 0;
}

.card-info .card-tag {
  display: inline-flex;
  align-items: center;
  width: max-content;
  height: 24px;
  padding: 0 10px;
  border-radius: var(--radius-pill);
  background: rgba(31,111,255,0.15);
  color: var(--primary-light);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card-info .card-tag.gold-tag {
  background: rgba(255,184,0,0.12);
  color: var(--accent);
}

.card-info h3 {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 6px;
  color: var(--text);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.card-info p {
  font-size: 0.8125rem;
  color: var(--text-sub);
  line-height: 1.6;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  margin-bottom: 8px;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.75rem;
  color: var(--text-mute);
}

/* 要点列表 */
.points-panel {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 32px;
  position: sticky;
  top: 140px;
  backdrop-filter: blur(12px);
}

.points-panel h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 16px;
}

.points-panel h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
}

.points-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.points-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.points-icon {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(49,208,192,0.1);
  color: var(--cyan);
  border: 1px solid rgba(49,208,192,0.25);
}

.points-icon.gold {
  background: rgba(255,184,0,0.1);
  color: var(--accent);
  border-color: rgba(255,184,0,0.25);
}

.points-icon.blue {
  background: rgba(31,111,255,0.1);
  color: var(--primary-light);
  border-color: rgba(31,111,255,0.25);
}

.points-item p {
  font-size: 0.875rem;
  color: var(--text);
  line-height: 1.65;
}

.points-item p strong {
  display: block;
  font-weight: 600;
  margin-bottom: 2px;
}

/* ======== 流程步骤 ======== */
.steps-section {
  padding: 80px 0;
  background: rgba(0,0,0,0.15);
  position: relative;
}

.steps-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.step-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  position: relative;
  backdrop-filter: blur(8px);
  transition: all var(--transition);
}

.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(49,208,192,0.4);
}

.step-num {
  font-size: 2.5rem;
  font-weight: 200;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.step-num::after {
  content: '';
  width: 40px;
  height: 2px;
  background: rgba(255,184,0,0.5);
  border-radius: 2px;
}

.step-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 0.875rem;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ======== 场景模块 ======== */
.scene-section {
  padding: 80px 0;
}

.scene-grid {
  display: grid;
  gap: 40px;
}

.scene-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  padding: 32px;
  backdrop-filter: blur(8px);
  transition: all var(--transition);
}

.scene-row:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(31,111,255,0.3);
}

.scene-row:nth-child(even) .scene-pic {
  order: 2;
}

.scene-pic {
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}

.scene-pic img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.scene-row:hover .scene-pic img {
  transform: scale(1.03);
}

.scene-pic::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(5,10,30,0.4));
  pointer-events: none;
}

.scene-info h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}

.scene-info p {
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
  margin-bottom: 16px;
}

.scene-info .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ======== FAQ ======== */
.faq-section {
  padding: 80px 0;
  background: rgba(0,0,0,0.15);
}

.faq-container {
  max-width: 760px;
  margin: 40px auto 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  backdrop-filter: blur(8px);
  transition: all var(--transition);
}

.faq-item:hover {
  border-color: rgba(31,111,255,0.3);
}

.faq-question {
  width: 100%;
  min-height: 56px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font-size: 0.9375rem;
  font-weight: 600;
  transition: background var(--transition);
}

.faq-question:hover {
  background: rgba(255,255,255,0.04);
}

.faq-icon {
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  position: relative;
  transition: background var(--transition), border-color var(--transition);
}

.faq-icon::before, .faq-icon::after {
  content: '';
  position: absolute;
  background: var(--text);
  transition: transform 0.3s ease, background 0.3s;
}

.faq-icon::before {
  width: 12px;
  height: 2px;
}

.faq-icon::after {
  height: 12px;
  width: 2px;
}

.faq-item.open .faq-icon::after {
  transform: scaleY(0);
}

.faq-item.open .faq-icon {
  background: rgba(255,184,0,0.15);
  border-color: rgba(255,184,0,0.3);
}

.faq-item.open .faq-icon::before {
  background: var(--accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer p {
  padding: 0 20px 20px;
  color: var(--text-sub);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* ======== CTA ======== */
.cta-section {
  position: relative;
  padding: 90px 0;
  text-align: center;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(5,10,30,0.92), rgba(31,111,255,0.35));
}

.cta-section::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.3;
}

.cta-section .container {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}

.cta-section p {
  color: #AEB9D6;
  font-size: 1.0625rem;
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

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

.cta-note {
  margin-top: 20px;
  font-size: 0.8125rem;
  color: var(--text-mute);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.cta-note svg {
  color: var(--cyan);
}

/* ======== 页脚 ======== */
.site-footer {
  background: rgba(2,6,18,0.9);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 260px;
}

.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--text-sub);
  padding: 4px 0;
  transition: color var(--transition);
}

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

.footer-contact p {
  font-size: 0.875rem;
  color: var(--text-sub);
  line-height: 1.8;
}

.footer-bottom {
  padding: 24px 0;
  font-size: 0.875rem;
  color: var(--text-mute);
  text-align: center;
}

/* ======== 响应式 ======== */
@media (max-width: 1024px) {
  .intro-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .points-panel {
    position: static;
  }

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

  .scene-row {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .scene-row:nth-child(even) .scene-pic {
    order: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .header-top {
    height: auto;
    padding: 12px 0;
  }

  .header-top-inner {
    height: auto;
    flex-wrap: wrap;
  }

  .search-form {
    width: 100%;
    order: 3;
  }

  .search-form:focus-within {
    width: 100%;
  }

  .header-cta {
    display: none;
  }

  .category-banner {
    padding: 60px 0 50px;
  }

  .intro-section, .feature-section, .steps-section, .scene-section, .faq-section, .cta-section {
    padding: 48px 0;
  }

  .article-card {
    flex-direction: column;
  }

  .article-card .card-pic {
    width: 100%;
    min-width: 0;
    height: 160px;
  }

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

  .footer-bottom {
    text-align: left;
  }
}

@media (max-width: 520px) {
  .steps-grid {
    grid-template-columns: 1fr;
  }

  .header-actions .search-form {
    margin-top: 10px;
  }

  .intro-links {
    flex-direction: column;
    align-items: flex-start;
  }

  .banner-badges {
    flex-wrap: wrap;
  }

  .scene-pic img {
    height: 180px;
  }
}