/* roulang page: index */
:root{
  --bg-primary:#0B0F14;
  --bg-card:#121922;
  --bg-inner:#1A2430;
  --accent:#FFAE3D;
  --accent-hover:#FFC36E;
  --accent-active:#E89B28;
  --accent-cyan:#2AD4B2;
  --text-primary:#F2F6F8;
  --text-secondary:#8CA0B0;
  --border-color:rgba(255,255,255,.08);
  --success:#3DBE7C;
  --danger:#F36060;
  --radius-lg:20px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow-card:0 8px 30px rgba(0,0,0,.25);
  --shadow-hover:0 16px 48px rgba(0,0,0,.45);
  --spacing-section:88px;
  --font-main:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-main);
  background-color:var(--bg-primary);
  color:var(--text-primary);
  line-height:1.75;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;transition:color .25s ease}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
img{max-width:100%;display:block}
.container{max-width:1280px;padding-left:20px;padding-right:20px}
.section-spacing{padding-top:var(--spacing-section);padding-bottom:var(--spacing-section)}
.empty-tip{padding:40px 20px;text-align:center;color:var(--text-secondary);background:var(--bg-card);border-radius:var(--radius-sm);border:1px dashed var(--border-color)}

/* ===== Buttons ===== */
.btn{
  --bs-btn-padding-y:14px;
  --bs-btn-padding-x:32px;
  border-radius:var(--radius-pill);
  font-weight:700;
  font-size:1rem;
  transition:all .25s ease;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:1px solid transparent;
}
.btn-primary{
  background:var(--accent);
  border-color:var(--accent);
  color:var(--bg-primary);
}
.btn-primary:hover{
  background:var(--accent-hover);
  border-color:var(--accent-hover);
  transform:translateY(-2px);
  box-shadow:0 12px 32px rgba(255,174,61,.25);
  color:var(--bg-primary);
}
.btn-primary:active{
  background:var(--accent-active);
  border-color:var(--accent-active);
  transform:translateY(0);
}
.btn-outline{
  background:transparent;
  border:1px solid rgba(255,255,255,.35);
  color:var(--text-primary);
}
.btn-outline:hover{
  border-color:var(--accent);
  color:var(--accent);
  background:rgba(255,174,61,.08);
  transform:translateY(-2px);
}
.btn-outline:active{transform:translateY(0);background:rgba(255,174,61,.16);border-color:var(--accent-active);color:var(--accent-active)}
.btn:disabled,.btn.disabled{opacity:.5;cursor:not-allowed;transform:none}

/* ===== Navbar ===== */
.custom-nav{
  background:rgba(11,15,20,.85);
  backdrop-filter:blur(12px);
  min-height:72px;
  py:0;
  border-bottom:1px solid transparent;
  transition:background .3s ease,box-shadow .3s ease,border-color .3s ease;
  z-index:1030;
}
.custom-nav.nav-scrolled{
  background:rgba(11,15,20,.94);
  border-bottom:1px solid var(--border-color);
  box-shadow:0 4px 24px rgba(0,0,0,.3);
}
.nav-inner{display:flex;align-items:center;gap:20px;min-height:72px;flex-wrap:nowrap}
.brand-logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-icon{
  width:40px;height:40px;
  background:var(--accent);
  color:var(--bg-primary);
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:1.2rem;
  letter-spacing:0;
}
.brand-text{font-size:1.25rem;font-weight:700;letter-spacing:.02em;color:var(--text-primary)}
.nav-search{
  flex:1;
  max-width:560px;
  height:44px;
  background:var(--bg-inner);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius-pill);
  display:flex;
  align-items:center;
  padding:0 8px 0 18px;
  transition:border-color .25s ease,box-shadow .25s ease;
  margin:0 auto;
}
.nav-search:focus-within{
  border-color:var(--accent);
  box-shadow:0 0 0 4px rgba(255,174,61,.15);
}
.nav-search input{
  flex:1;
  background:transparent;
  border:none;
  color:var(--text-primary);
  font-size:.95rem;
  padding:0 12px;
  min-width:0;
}
.nav-search input::placeholder{color:var(--text-secondary)}
.nav-search input:focus{outline:none;box-shadow:none}
.nav-search .search-icon{color:var(--text-secondary);flex-shrink:0}
.search-divider{width:1px;height:20px;background:rgba(255,255,255,.1);flex-shrink:0}
.search-btn{
  background:transparent;
  border:none;
  color:var(--text-secondary);
  font-size:.875rem;
  font-weight:600;
  padding:0 12px;
  cursor:pointer;
  transition:color .2s ease;
  flex-shrink:0;
}
.search-btn:hover{color:var(--accent)}
.nav-links{display:flex;align-items:center;gap:2px;flex-shrink:0}
.nav-links a{
  display:inline-block;
  padding:8px 14px;
  font-size:.95rem;
  font-weight:500;
  color:var(--text-secondary);
  border-radius:var(--radius-pill);
  position:relative;
  transition:color .25s ease,background .25s ease;
}
.nav-links a::after{
  content:'';
  position:absolute;
  left:14px;right:14px;bottom:0;
  height:2px;
  background:var(--accent);
  border-radius:2px;
  opacity:0;
  transform:scaleX(.5);
  transition:opacity .25s ease,transform .25s ease;
}
.nav-links a:hover{color:var(--accent)}
.nav-links a:hover::after{opacity:1;transform:scaleX(1)}
.nav-links a.active{color:var(--accent)}
.nav-links a.active::after{opacity:1;transform:scaleX(1)}
.nav-toggle{
  width:44px;height:44px;
  background:transparent;
  border:1px solid rgba(255,255,255,.15);
  border-radius:var(--radius-sm);
  display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  gap:4px;
  cursor:pointer;
  flex-shrink:0;
  transition:border-color .25s ease;
}
.nav-toggle:hover{border-color:var(--accent)}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--text-primary);border-radius:2px;transition:background .25s ease}
.nav-toggle:hover span{background:var(--accent)}
.mobile-panel{
  background:var(--bg-primary);
  border-top:1px solid var(--border-color);
  padding:20px 0;
}
.mobile-panel .mobile-search{
  width:100%;
  flex:none;
  margin-bottom:16px;
}
.mobile-panel .mobile-links{display:flex;flex-direction:column;gap:4px}
.mobile-panel .mobile-links a{
  display:block;
  padding:12px 16px;
  border-radius:var(--radius-sm);
  color:var(--text-secondary);
  font-weight:500;
  transition:background .25s ease,color .25s ease;
}
.mobile-panel .mobile-links a:hover,.mobile-panel .mobile-links a.active{background:rgba(255,174,61,.08);color:var(--accent)}

/* ===== Hero ===== */
.hero{
  position:relative;
  min-height:90vh;
  display:flex;
  align-items:center;
  background-color:var(--bg-primary);
  overflow:hidden;
  padding:120px 0 80px;
}
.hero-bg{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center 30%;
  background-repeat:no-repeat;
  z-index:0;
}
.hero-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(to right,rgba(11,15,20,.95) 20%,rgba(11,15,20,.6) 55%,rgba(11,15,20,.35) 100%);
  z-index:1;
}
.hero-content{position:relative;z-index:2;max-width:720px}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(255,174,61,.12);
  border:1px solid rgba(255,174,61,.35);
  color:var(--accent);
  font-size:.825rem;
  font-weight:600;
  letter-spacing:.04em;
  padding:6px 16px;
  border-radius:var(--radius-pill);
  margin-bottom:24px;
}
.hero-badge::before{content:'';width:6px;height:6px;background:var(--accent);border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{
  font-size:clamp(2.4rem,6vw,4.5rem);
  line-height:1.1;
  font-weight:800;
  letter-spacing:.02em;
  margin-bottom:24px;
  text-wrap:balance;
}
.hero-sub{
  font-size:clamp(1.05rem,2vw,1.3rem);
  color:var(--text-secondary);
  line-height:1.7;
  margin-bottom:40px;
  max-width:600px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-actions .btn{min-width:160px}

/* ===== Section Head ===== */
.section-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:1.85rem;font-weight:700;letter-spacing:.02em;margin:0}
.section-head .section-desc{color:var(--text-secondary);margin-top:8px;font-size:1rem}
.text-link{
  color:var(--accent);
  font-weight:600;
  font-size:.95rem;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 0;
  transition:gap .25s ease;
}
.text-link:hover{gap:12px;color:var(--accent-hover)}
.text-link svg{transition:transform .25s ease}
.deco-bar{display:inline-block;width:4px;height:24px;background:var(--accent);border-radius:4px;margin-right:12px;vertical-align:middle}
.badge-hot{
  background:var(--accent);
  color:var(--bg-primary);
  font-size:.75rem;
  font-weight:700;
  padding:4px 14px;
  border-radius:var(--radius-pill);
  letter-spacing:.05em;
  margin-left:8px;
  vertical-align:middle;
}

/* ===== Rail Section ===== */
.rail-section{padding-top:var(--spacing-section);padding-bottom:var(--spacing-section)}
.rail-scroll{
  display:flex;
  gap:24px;
  overflow-x:auto;
  padding:12px 20px 30px;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
  scroll-snap-type:x mandatory;
}
.rail-scroll::-webkit-scrollbar{display:none}
.rail-card{
  flex:0 0 280px;
  background:var(--bg-card);
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--border-color);
  transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;
  scroll-snap-align:start;
}
.rail-card:hover{
  transform:translateY(-4px);
  box-shadow:0 16px 48px rgba(0,0,0,.5);
  border-color:rgba(255,174,61,.35);
}
.rail-cover{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--bg-inner);
}
.rail-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.rail-card:hover .rail-cover img{transform:scale(1.06)}
.rail-cover::after{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(11,15,20,.3),transparent 60%);
}
.rail-body{padding:20px;position:relative}
.rail-body h3{font-size:1.15rem;font-weight:700;margin-bottom:8px;letter-spacing:.02em}
.rail-body p{font-size:.875rem;color:var(--text-secondary);line-height:1.6;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rail-model{
  display:inline-flex;
  align-items:center;
  font-size:.75rem;
  font-weight:600;
  color:var(--accent-cyan);
  background:rgba(42,212,178,.08);
  border:1px solid rgba(42,212,178,.2);
  padding:3px 10px;
  border-radius:var(--radius-pill);
  letter-spacing:.03em;
}

/* ===== Grid Cards ===== */
.grid-section{padding-top:0;padding-bottom:var(--spacing-section)}
.hover-card{
  background:var(--bg-card);
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--border-color);
  transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;
  height:100%;
  display:flex;
  flex-direction:column;
}
.hover-card:hover{
  transform:translateY(-4px);
  box-shadow:0 16px 48px rgba(0,0,0,.45),0 0 0 1px rgba(255,174,61,.35);
  border-color:rgba(255,174,61,.35);
}
.card-cover{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--bg-inner);
}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.hover-card:hover .card-cover img{transform:scale(1.06)}
.card-badge{
  position:absolute;
  top:14px;right:14px;
  background:rgba(11,15,20,.85);
  color:var(--accent);
  font-size:.75rem;
  font-weight:600;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  z-index:2;
  backdrop-filter:blur(6px);
  border:1px solid rgba(255,174,61,.3);
  letter-spacing:.04em;
}
.card-cover::after{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(11,15,20,.35),transparent 55%);
}
.card-body{padding:24px;flex:1;display:flex;flex-direction:column}
.card-body h3{font-size:1.2rem;font-weight:700;margin-bottom:10px;letter-spacing:.02em}
.card-body .card-excerpt{
  font-size:.925rem;
  color:var(--text-secondary);
  line-height:1.65;
  margin-bottom:14px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.card-tag{
  font-size:.75rem;
  font-weight:500;
  color:var(--text-secondary);
  background:var(--bg-inner);
  border:1px solid rgba(255,255,255,.06);
  padding:3px 10px;
  border-radius:var(--radius-pill);
}
.card-link{
  margin-top:auto;
  color:var(--accent);
  font-weight:600;
  font-size:.9rem;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:gap .25s ease;
}
.card-link:hover{gap:12px;color:var(--accent-hover)}

/* ===== Category Band ===== */
.category-section{padding-top:0;padding-bottom:var(--spacing-section)}
.category-card{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--border-color);
  min-height:260px;
  display:flex;
  align-items:flex-end;
  transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;
}
.category-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(255,174,61,.35);
}
.category-card .cat-cover{
  position:absolute;inset:0;
  overflow:hidden;
  aspect-ratio:4/3;
}
.category-card .cat-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.category-card:hover .cat-cover img{transform:scale(1.06)}
.category-card .cat-cover::after{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(11,15,20,.92) 0%,rgba(11,15,20,.4) 55%,rgba(11,15,20,.1) 100%);
}
.cat-content{position:relative;z-index:2;padding:28px;width:100%}
.cat-content h3{font-size:1.35rem;font-weight:700;margin-bottom:6px;letter-spacing:.02em}
.cat-count{font-size:.8rem;font-weight:600;color:var(--accent);margin-bottom:8px;display:block}
.cat-desc{font-size:.875rem;color:var(--text-secondary);line-height:1.6;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cat-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--accent);
  font-weight:600;
  font-size:.9rem;
  transition:gap .25s ease;
}
.cat-link:hover{gap:12px;color:var(--accent-hover)}

/* ===== CTA Section ===== */
.cta-section{
  position:relative;
  padding:120px 0;
  background-color:var(--bg-primary);
  overflow:hidden;
  text-align:center;
}
.cta-section .cta-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
  z-index:0;
}
.cta-section .cta-bg::after{
  content:'';
  position:absolute;
  inset:0;
  background:rgba(11,15,20,.82);
}
.cta-section .cta-bg::before{
  content:'';
  position:absolute;
  top:50%;left:50%;
  width:600px;height:600px;
  transform:translate(-50%,-50%);
  background:radial-gradient(circle,rgba(255,174,61,.15),transparent 70%);
  z-index:1;
  animation:glow 6s ease-in-out infinite alternate;
}
@keyframes glow{
  0%{opacity:.6;transform:translate(-50%,-50%) scale(1)}
  100%{opacity:1;transform:translate(-50%,-50%) scale(1.15)}
}
.cta-inner{position:relative;z-index:2;max-width:680px;margin:0 auto}
.cta-inner h2{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;letter-spacing:.02em;margin-bottom:16px}
.cta-inner p{font-size:1.05rem;color:var(--text-secondary);line-height:1.7;margin-bottom:36px}
.cta-form{display:flex;gap:12px;max-width:480px;margin:0 auto 28px;flex-wrap:wrap;justify-content:center}
.cta-form input{
  flex:1;
  min-width:220px;
  height:52px;
  background:var(--bg-inner);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius-pill);
  color:var(--text-primary);
  padding:0 22px;
  font-size:.95rem;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.cta-form input::placeholder{color:var(--text-secondary)}
.cta-form input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,174,61,.15)}
.cta-form .btn{height:52px;padding:0 32px;border-radius:var(--radius-pill)}
.cta-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ===== News Section ===== */
.news-section{padding-top:var(--spacing-section);padding-bottom:var(--spacing-section);background:var(--bg-primary)}
.news-card{
  background:var(--bg-card);
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--border-color);
  transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;
  height:100%;
  display:flex;
  flex-direction:column;
}
.news-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(255,174,61,.3);
}
.news-cover{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--bg-inner);
}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.news-card:hover .news-cover img{transform:scale(1.05)}
.news-cover::after{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(11,15,20,.35),transparent 55%);
}
.news-body{padding:24px;flex:1;display:flex;flex-direction:column}
.news-cat{
  display:inline-block;
  font-size:.75rem;
  font-weight:600;
  color:var(--accent-cyan);
  background:rgba(42,212,178,.08);
  border:1px solid rgba(42,212,178,.2);
  padding:3px 12px;
  border-radius:var(--radius-pill);
  letter-spacing:.03em;
  margin-bottom:14px;
  width:fit-content;
}
.news-body h3{font-size:1.1rem;font-weight:700;line-height:1.45;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body h3 a{transition:color .25s ease}
.news-body h3 a:hover{color:var(--accent)}
.news-body p{
  font-size:.875rem;
  color:var(--text-secondary);
  line-height:1.65;
  margin-bottom:16px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-meta{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-top:14px;
  border-top:1px solid var(--border-color);
}
.news-meta time{font-size:.8rem;color:var(--text-secondary);display:flex;align-items:center;gap:6px}
.read-more{
  font-size:.85rem;
  font-weight:600;
  color:var(--accent);
  display:inline-flex;
  align-items:center;
  gap:4px;
  transition:gap .25s ease;
}
.read-more:hover{gap:10px;color:var(--accent-hover)}

/* ===== FAQ ===== */
.faq-section{padding-top:0;padding-bottom:var(--spacing-section)}
.faq-section h2{font-size:1.85rem;font-weight:700;text-align:center;margin-bottom:48px;letter-spacing:.02em}
.faq-wrap{max-width:820px;margin:0 auto}
.accordion-item{
  background:var(--bg-card);
  border:1px solid var(--border-color);
  border-radius:var(--radius-sm) !important;
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .25s ease;
}
.accordion-item:hover{border-color:rgba(255,174,61,.2)}
.accordion-button{
  background:var(--bg-card);
  color:var(--text-primary);
  font-size:1rem;
  font-weight:600;
  padding:18px 22px;
  box-shadow:none !important;
  gap:14px;
  letter-spacing:.01em;
}
.accordion-button:not(.collapsed){
  background:var(--bg-card);
  color:var(--accent);
  box-shadow:none !important;
  border-left:3px solid var(--accent);
}
.accordion-button::after{
  background-image:none;
  width:auto;height:auto;
  content:'';
  font-size:1.2rem;
  font-weight:400;
  transition:transform .3s ease;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--text-secondary);
  flex-shrink:0;
}
.accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);
  color:var(--accent);
}
.accordion-button::before{
  content:'+';
  margin-left:auto;
  font-size:1.4rem;
  font-weight:300;
  color:var(--text-secondary);
  transition:transform .3s ease,color .3s ease;
}
.accordion-button:not(.collapsed)::before{transform:rotate(45deg);color:var(--accent)}
.accordion-button:focus{box-shadow:none}
.accordion-body{
  padding:0 22px 20px;
  color:var(--text-secondary);
  font-size:.925rem;
  line-height:1.75;
  border-left:3px solid var(--accent);
}

/* ===== Footer ===== */
.site-footer{
  background:#080C10;
  border-top:1px solid var(--border-color);
  padding-top:64px;
}
.footer-top{padding-bottom:48px}
.footer-brand-logo{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.footer-brand p{color:var(--text-secondary);font-size:.9rem;line-height:1.7;max-width:320px}
.footer-col-title{font-size:1rem;font-weight:700;margin-bottom:20px;letter-spacing:.03em;position:relative;padding-bottom:10px}
.footer-col-title::after{content:'';position:absolute;left:0;bottom:0;width:28px;height:2px;background:var(--accent);border-radius:2px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:var(--text-secondary);font-size:.9rem;transition:color .25s ease,padding-left .25s ease}
.footer-links a:hover{color:var(--accent);padding-left:6px}
.footer-contact-item{
  display:flex;
  align-items:flex-start;
  gap:12px;
  margin-bottom:14px;
  color:var(--text-secondary);
  font-size:.875rem;
  line-height:1.6;
}
.footer-contact-item svg{flex-shrink:0;color:var(--accent);margin-top:3px}
.footer-bottom{
  border-top:1px solid var(--border-color);
  background:#060A0D;
  padding:20px 0;
}
.footer-bottom .container{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
}
.footer-bottom span,.footer-bottom a{font-size:.8rem;color:var(--text-secondary)}

/* ===== Responsive ===== */
@media (max-width:991.98px){
  .nav-search{display:none}
  .nav-links{display:none}
  .nav-search.mobile-search{display:flex}
  .custom-nav{min-height:64px}
  .nav-inner{min-height:64px}
  :root{--spacing-section:64px}
}
@media (min-width:992px){
  .nav-toggle{display:none}
  .mobile-panel{display:none !important}
}
@media (max-width:767.98px){
  :root{--spacing-section:56px}
  .hero{min-height:70vh;padding:100px 0 60px}
  .hero h1{font-size:clamp(1.75rem,7vw,2.6rem)}
  .hero-sub{font-size:1rem;margin-bottom:28px}
  .hero-actions .btn{width:100%;justify-content:center}
  .rail-card{flex-basis:220px}
  .section-head h2{font-size:1.4rem}
  .section-head .section-desc{font-size:.9rem}
  .cat-content{padding:20px}
  .cta-section{padding:80px 0}
  .cta-form input{min-width:100%}
  .cta-buttons .btn{width:100%}
  .footer-bottom .container{justify-content:center;text-align:center}
  .category-card{min-height:220px}
}
@media (max-width:575.98px){
  .hero .container{padding-left:16px;padding-right:16px}
  .hero-badge{font-size:.75rem;padding:4px 12px}
  .hero h1{font-size:1.8rem}
  .hero-actions{gap:12px}
  .nav-search{padding:0 6px 0 12px}
  .nav-search input{padding:0 8px;font-size:.875rem}
  .container{padding-left:16px;padding-right:16px}
  .card-body{padding:18px}
  .news-body{padding:18px}
  .rail-scroll{padding-left:16px;padding-right:16px}
  .accordion-button{padding:15px 16px;font-size:.925rem}
  .accordion-body{padding:0 16px 18px;font-size:.875rem}
}

/* roulang page: category1 */
/* ====== 设计变量 ====== */
        :root {
            --bg-body: #0B0F14;
            --bg-card: #121922;
            --bg-input: #1A2430;
            --color-primary: #FFAE3D;
            --color-primary-hover: #FFC36E;
            --color-primary-active: #E89B28;
            --color-secondary: #2AD4B2;
            --color-text: #F2F6F8;
            --color-text-muted: #8CA0B0;
            --color-border: rgba(255, 255, 255, .08);
            --color-success: #3DBE7C;
            --color-danger: #F36060;
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, .25);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, .45), 0 0 0 1px rgba(255, 174, 61, .35);
            --shadow-input: 0 0 0 4px rgba(255, 174, 61, .15);
            --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
            --section-pad: 88px;
            --section-pad-mobile: 56px;
        }
        /* ====== Reset / Base ====== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-body);
            color: var(--color-text);
            line-height: 1.75;
            font-size: 1rem;
            overflow-x: hidden;
        }
        a {
            color: var(--color-secondary);
            text-decoration: none;
            transition: color .25s ease;
        }
        a:hover {
            color: var(--color-primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
        }
        .container {
            max-width: 1280px;
        }
        .section-padding {
            padding: var(--section-pad) 0;
        }

        /* ====== 固定导航 ====== */
        .custom-nav {
            min-height: 72px;
            background: rgba(11, 15, 20, .85);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid transparent;
            transition: background .3s ease, border-color .3s ease, box-shadow .3s ease;
            padding: 12px 0;
            z-index: 1050;
        }
        .custom-nav.scrolled {
            background: rgba(11, 15, 20, .92);
            border-bottom-color: var(--color-border);
            box-shadow: 0 4px 24px rgba(0, 0, 0, .3);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: nowrap;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            background: var(--color-primary);
            color: #0B0F14;
            font-size: 18px;
            font-weight: 800;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            letter-spacing: 0;
        }
        .brand-text {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: .03em;
            white-space: nowrap;
        }
        /* 搜索框 */
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-input);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius-pill);
            padding: 0 8px 0 16px;
            height: 44px;
            flex: 1;
            max-width: 560px;
            min-width: 180px;
            transition: border-color .25s, box-shadow .25s;
        }
        .nav-search:focus-within {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-input);
        }
        .search-icon {
            color: var(--color-text-muted);
            flex-shrink: 0;
        }
        .nav-search input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            color: var(--color-text);
            padding: 0 10px;
            font-size: .95rem;
            height: 100%;
        }
        .nav-search input::placeholder {
            color: #5E7687;
        }
        .search-divider {
            width: 1px;
            height: 22px;
            background: rgba(255, 255, 255, .15);
            margin: 0 8px;
        }
        .search-btn {
            background: transparent;
            border: none;
            color: var(--color-primary);
            font-weight: 600;
            font-size: .9rem;
            padding: 6px 12px;
            border-radius: var(--radius-pill);
            transition: background .2s, color .2s;
            white-space: nowrap;
        }
        .search-btn:hover {
            background: rgba(255, 174, 61, .1);
            color: var(--color-primary-hover);
        }
        /* 导航链接 */
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .nav-links a {
            color: var(--color-text-muted);
            font-size: .95rem;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            position: relative;
            transition: color .25s, background .25s;
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, .05);
        }
        .nav-links a.active {
            color: var(--color-primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
        }
        /* 移动端按钮 */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            border-radius: 8px;
            cursor: pointer;
            flex-shrink: 0;
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--color-text);
            border-radius: 2px;
            transition: background .2s;
        }
        .nav-toggle:hover span {
            background: var(--color-primary);
        }
        /* 移动端折叠面板 */
        .mobile-nav-collapse {
            background: rgba(11, 15, 20, .98);
            border-bottom: 1px solid var(--color-border);
            padding: 16px 16px 20px;
        }
        .mobile-nav-collapse .mobile-search {
            display: flex;
            align-items: center;
            background: var(--bg-input);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius-pill);
            padding: 0 12px;
            height: 44px;
            margin-bottom: 16px;
        }
        .mobile-search svg {
            color: var(--color-text-muted);
            margin-right: 8px;
        }
        .mobile-search input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            color: var(--color-text);
        }
        .mobile-nav-links {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-nav-links a {
            display: block;
            padding: 10px 16px;
            color: var(--color-text-muted);
            border-radius: var(--radius-md);
            font-size: 1rem;
            transition: background .2s, color .2s;
        }
        .mobile-nav-links a:hover {
            color: var(--color-primary);
            background: rgba(255, 174, 61, .06);
        }
        .mobile-nav-links a.active {
            color: var(--color-primary);
            background: rgba(255, 174, 61, .08);
            font-weight: 600;
        }

        /* ====== 分类页 Hero ====== */
        .category-hero {
            position: relative;
            padding: 160px 0 72px;
            background: linear-gradient(120deg, rgba(11, 15, 20, .92) 20%, rgba(11, 15, 20, .65) 60%, rgba(11, 15, 20, .5) 100%), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            border-bottom: 1px solid var(--color-border);
        }
        .category-hero .breadcrumb-line {
            font-size: .85rem;
            color: var(--color-text-muted);
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .category-hero .breadcrumb-line a {
            color: var(--color-text-muted);
        }
        .category-hero .breadcrumb-line a:hover {
            color: var(--color-primary);
        }
        .category-hero .breadcrumb-line .sep {
            opacity: .5;
        }
        .category-hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: .02em;
            margin-bottom: 16px;
            color: var(--color-text);
        }
        .category-hero h1 span {
            color: var(--color-primary);
        }
        .category-hero .hero-desc {
            max-width: 640px;
            font-size: 1.05rem;
            color: var(--color-text-muted);
            line-height: 1.8;
        }

        /* ====== 关键指标 ====== */
        .metrics-section {
            background: var(--bg-body);
            padding: 56px 0 24px;
            margin-top: -1px;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s;
        }
        .metric-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 174, 61, .3);
        }
        .metric-icon {
            width: 48px;
            height: 48px;
            background: rgba(255, 174, 61, .1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }
        .metric-icon svg {
            color: var(--color-primary);
        }
        .metric-value {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--color-text);
            line-height: 1.3;
            letter-spacing: .01em;
            margin-bottom: 4px;
        }
        .metric-label {
            font-size: .9rem;
            color: var(--color-text-muted);
        }
        .metric-note {
            font-size: .85rem;
            color: var(--color-secondary);
            margin-top: 6px;
            display: block;
        }

        /* ====== 板块通用标题 ====== */
        .section-head {
            margin-bottom: 44px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .section-head h2 {
            font-size: 1.85rem;
            font-weight: 700;
            letter-spacing: .02em;
            position: relative;
            padding-left: 16px;
            margin-bottom: 0;
            line-height: 1.4;
        }
        .section-head h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: var(--color-primary);
            border-radius: 4px;
        }
        .section-head .section-sub {
            color: var(--color-text-muted);
            font-size: .95rem;
            max-width: 560px;
            text-align: right;
        }
        .section-head .more-link {
            color: var(--color-secondary);
            font-size: .9rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color .2s, gap .2s;
            white-space: nowrap;
        }
        .section-head .more-link:hover {
            color: var(--color-primary);
            gap: 10px;
        }

        /* ====== 产品卡片网格 ====== */
        .products-section {
            padding: 56px 0 var(--section-pad);
        }
        .product-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            transition: transform .35s ease, box-shadow .35s ease, border-color .35s;
            display: flex;
            flex-direction: column;
        }
        .product-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 174, 61, .3);
        }
        .product-cover {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
        }
        .product-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .product-card:hover .product-cover img {
            transform: scale(1.04);
        }
        .product-cover .cover-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(11, 15, 20, .7) 100%);
            z-index: 1;
        }
        .product-badge {
            position: absolute;
            top: 14px;
            right: 14px;
            background: var(--color-primary);
            color: #0B0F14;
            font-size: .75rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            z-index: 2;
            letter-spacing: .03em;
        }
        .product-badge.gray {
            background: rgba(18, 25, 34, .8);
            color: var(--color-text);
            backdrop-filter: blur(4px);
        }
        .product-card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .product-card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.45;
            color: var(--color-text);
        }
        .product-card-body p {
            font-size: .9rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .product-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--color-border);
        }
        .product-tag {
            font-size: .75rem;
            font-weight: 600;
            color: var(--color-secondary);
            background: rgba(42, 212, 178, .08);
            border: 1px solid rgba(42, 212, 178, .2);
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            letter-spacing: .03em;
        }
        .product-link {
            margin-left: auto;
            font-size: .85rem;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .2s;
        }
        .product-card:hover .product-link {
            gap: 8px;
        }

        /* ====== 核心卖点 ====== */
        .features-section {
            background: var(--bg-card);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            padding: var(--section-pad) 0;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-item {
            padding: 28px 24px;
            background: var(--bg-body);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            transition: transform .3s, box-shadow .3s, border-color .3s;
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 174, 61, .25);
        }
        .feature-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(42, 212, 178, .1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }
        .feature-icon svg {
            color: var(--color-secondary);
        }
        .feature-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-item p {
            font-size: .875rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ====== 适用场景 ====== */
        .scenarios-section {
            padding: var(--section-pad) 0;
            background: var(--bg-body);
        }
        .scenario-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            aspect-ratio: 4/3;
            border: 1px solid var(--color-border);
            transition: transform .35s, box-shadow .35s;
        }
        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .scenario-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .45s ease;
        }
        .scenario-card:hover img {
            transform: scale(1.04);
        }
        .scenario-card .scenario-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(11, 15, 20, .88) 0%, rgba(11, 15, 20, .2) 55%, transparent 100%);
            z-index: 1;
        }
        .scenario-card .scenario-content {
            position: absolute;
            z-index: 2;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 24px;
        }
        .scenario-content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--color-text);
        }
        .scenario-content p {
            font-size: .85rem;
            color: rgba(255, 255, 255, .75);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ====== 服务流程 ====== */
        .process-section {
            background: var(--bg-card);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            padding: var(--section-pad) 0;
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .process-step {
            position: relative;
            text-align: center;
            padding: 0 12px;
        }
        .process-step .step-num {
            width: 72px;
            height: 72px;
            background: var(--bg-body);
            border: 2px solid var(--color-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--color-primary);
            position: relative;
            z-index: 1;
        }
        .process-step::before {
            content: '';
            position: absolute;
            top: 36px;
            right: calc(50% + 44px);
            width: calc(100% - 40px);
            height: 2px;
            background: rgba(255, 174, 61, .25);
            display: none;
        }
        .process-step:not(:first-child)::before {
            display: block;
        }
        .process-step h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: .875rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ====== FAQ ====== */
        .faq-section {
            padding: var(--section-pad) 0;
            background: var(--bg-body);
        }
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .accordion {
            --bs-accordion-bg: var(--bg-card);
            --bs-accordion-color: var(--color-text);
            --bs-accordion-border-color: var(--color-border);
            --bs-accordion-border-radius: var(--radius-md);
            --bs-accordion-inner-border-radius: var(--radius-md);
            --bs-accordion-active-bg: rgba(255, 174, 61, .04);
            --bs-accordion-active-color: var(--color-primary);
            --bs-accordion-btn-focus-border-color: rgba(255, 174, 61, .4);
            --bs-accordion-btn-focus-box-shadow: 0 0 0 4px rgba(255, 174, 61, .1);
        }
        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .25s;
        }
        .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: rgba(255, 174, 61, .3);
        }
        .accordion-button {
            background: var(--bg-card);
            color: var(--color-text);
            font-weight: 600;
            font-size: 1rem;
            padding: 20px 24px;
            position: relative;
            transition: color .25s, background .25s;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(255, 174, 61, .04);
            color: var(--color-primary);
            border-left: 3px solid var(--color-primary);
        }
        .accordion-button::after {
            background-image: none;
            content: '+';
            font-size: 1.4rem;
            font-weight: 400;
            color: var(--color-primary);
            transform: none;
            transition: transform .3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
        }
        .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }
        .accordion-button:hover {
            color: var(--color-primary);
            background: rgba(255, 174, 61, .04);
        }
        .accordion-body {
            background: var(--bg-card);
            color: var(--color-text-muted);
            font-size: .925rem;
            line-height: 1.8;
            padding: 4px 24px 22px;
            border-top: 1px solid var(--color-border);
        }

        /* ====== CTA ====== */
        .cta-section {
            position: relative;
            padding: var(--section-pad) 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            border-top: 1px solid var(--color-border);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(11, 15, 20, .78);
            z-index: 1;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 520px;
            height: 520px;
            background: radial-gradient(circle, rgba(255, 174, 61, .14) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 760px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: .02em;
        }
        .cta-inner p {
            color: var(--color-text-muted);
            font-size: 1.05rem;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .cta-btns {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }
        .btn-main {
            background: var(--color-primary);
            color: #0B0F14;
            font-weight: 700;
            font-size: 1rem;
            border: none;
            padding: 14px 32px;
            border-radius: var(--radius-pill);
            transition: background .25s, transform .25s, box-shadow .25s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-main:hover {
            background: var(--color-primary-hover);
            color: #0B0F14;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 174, 61, .3);
        }
        .btn-main:active {
            background: var(--color-primary-active);
            transform: translateY(0);
        }
        .btn-ghost {
            background: transparent;
            color: var(--color-text);
            border: 1px solid rgba(255, 255, 255, .5);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: var(--radius-pill);
            transition: all .25s;
        }
        .btn-ghost:hover {
            color: var(--color-primary);
            border-color: var(--color-primary);
            background: rgba(255, 174, 61, .08);
            transform: translateY(-2px);
        }
        .cta-form {
            display: flex;
            gap: 10px;
            max-width: 460px;
            margin: 0 auto;
        }
        .cta-form input {
            flex: 1;
            background: var(--bg-input);
            border: 1px solid rgba(255, 255, 255, .12);
            color: var(--color-text);
            border-radius: var(--radius-pill);
            padding: 12px 20px;
            outline: none;
            font-size: .95rem;
            transition: border-color .25s, box-shadow .25s;
            height: 48px;
        }
        .cta-form input:focus {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-input);
        }
        .cta-form input::placeholder {
            color: #5E7687;
        }
        .cta-form .btn-main {
            padding: 12px 28px;
            height: 48px;
        }

        /* ====== 页脚 ====== */
        .site-footer {
            background: #0B0F14;
            border-top: 1px solid var(--color-border);
        }
        .site-footer .footer-top {
            padding: 72px 0 40px;
        }
        .footer-brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand-logo .brand-icon {
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            color: #0B0F14;
            font-size: 16px;
            font-weight: 800;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .footer-brand-logo .brand-text {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--color-text);
        }
        .site-footer p {
            color: var(--color-text-muted);
            font-size: .9rem;
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 340px;
        }
        .footer-col-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 18px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: var(--color-text-muted);
            font-size: .9rem;
            transition: color .2s, padding-left .2s;
        }
        .footer-links a:hover {
            color: var(--color-primary);
            padding-left: 4px;
        }
        .footer-contact-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 14px;
            color: var(--color-text-muted);
            font-size: .9rem;
            line-height: 1.6;
        }
        .footer-contact-item svg {
            color: var(--color-secondary);
            flex-shrink: 0;
            margin-top: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border);
            background: #080C10;
            padding: 18px 0;
        }
        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom span {
            font-size: .85rem;
            color: var(--color-text-muted);
        }

        /* ====== 响应式 ====== */
        @media (max-width: 991.98px) {
            .custom-nav {
                padding: 10px 0;
            }
            .nav-inner {
                flex-wrap: wrap;
                gap: 12px;
            }
            .brand-logo {
                margin-right: auto;
            }
            .nav-search {
                order: 3;
                max-width: 100%;
                flex-basis: 100%;
            }
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .metrics-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                row-gap: 40px;
            }
            .process-step::before {
                display: none !important;
            }
        }

        @media (max-width: 767.98px) {
            .section-padding {
                padding: var(--section-pad-mobile) 0;
            }
            .category-hero {
                padding: 130px 0 56px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero .hero-desc {
                font-size: .95rem;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .metric-card {
                padding: 24px 20px;
            }
            .section-head {
                margin-bottom: 28px;
            }
            .section-head .section-sub {
                text-align: left;
                font-size: .875rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .scenarios-grid {
                grid-template-columns: 1fr !important;
            }
            .cta-btns {
                flex-direction: column;
            }
            .cta-btns .btn-main,
            .cta-btns .btn-ghost {
                width: 100%;
                justify-content: center;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form .btn-main {
                width: 100%;
            }
            .footer-top {
                padding: 48px 0 24px;
            }
            .btn-main,
            .btn-ghost {
                padding: 12px 24px;
            }
        }

        @media (max-width: 575.98px) {
            .nav-inner {
                gap: 8px;
            }
            .nav-search .search-divider {
                display: none;
            }
            .nav-search .search-btn {
                display: none;
            }
            .brand-text {
                font-size: 1.05rem;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }
            .category-hero {
                padding: 120px 0 44px;
            }
            .category-hero h1 {
                font-size: 1.7rem;
            }
            .products-section {
                padding: 40px 0 var(--section-pad-mobile);
            }
            .product-cover {
                aspect-ratio: 16/10;
            }
            .product-card-body {
                padding: 18px;
            }
            .product-card-body h3 {
                font-size: 1.05rem;
            }
            .product-card-body p {
                font-size: .85rem;
            }
            .accordion-button {
                font-size: .95rem;
                padding: 16px 18px;
            }
            .accordion-body {
                padding: 2px 18px 18px;
                font-size: .875rem;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-inner h2 {
                font-size: 1.5rem;
            }
            .cta-inner p {
                font-size: .95rem;
            }
            .process-grid {
                grid-template-columns: 1fr;
                row-gap: 32px;
            }
            .footer-bottom .container {
                flex-direction: column;
                text-align: center;
            }
        }

        /* 边缘渐隐遮罩（桌面横滑展示用途） */
        @media (min-width: 992px) {
            .fade-edge {
                position: relative;
            }
            .fade-edge::after {
                content: '';
                position: absolute;
                top: 0;
                right: 0;
                width: 60px;
                height: 100%;
                background: linear-gradient(to right, transparent, var(--bg-body));
                pointer-events: none;
            }
        }

        /* 可访问焦点 */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }

/* roulang page: article */
:root{
  --bg-page:#0B0F14;--bg-card:#121922;--bg-input:#1A2430;--accent:#FFAE3D;--accent-hover:#FFC36E;--accent-active:#E89B28;--secondary:#2AD4B2;--text-main:#F2F6F8;--text-muted:#8CA0B0;--border:rgba(255,255,255,.08);--success:#3DBE7C;--danger:#F36060;--radius-lg:20px;--radius-md:12px;--radius-pill:999px;--shadow-card:0 8px 30px rgba(0,0,0,.25);--shadow-hover:0 16px 48px rgba(0,0,0,.45);--glow-hover:0 0 0 1px rgba(255,174,61,.35),0 16px 48px rgba(0,0,0,.45);--transition:.3s ease;
}
*{box-sizing:border-box}
html,body{overflow-x:hidden}
body{margin:0;font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;background:var(--bg-page);color:var(--text-main);line-height:1.75;font-size:1rem;padding-top:72px}
a{color:var(--secondary);text-decoration:none;transition:color .3s ease}
a:hover{color:var(--accent)}
img{max-width:100%;display:block}
button,input{font-family:inherit}
.container{max-width:1280px;padding-left:20px;padding-right:20px}
.btn{display:inline-flex;align-items:center;justify-content:center;border:none;border-radius:var(--radius-pill);padding:14px 32px;font-weight:700;font-size:1rem;line-height:1.4;transition:all .3s ease;cursor:pointer}
.btn-primary{background:var(--accent);color:var(--bg-page)}
.btn-primary:hover{background:var(--accent-hover);color:var(--bg-page);transform:translateY(-2px);box-shadow:0 12px 32px rgba(255,174,61,.28)}
.btn-primary:active{background:var(--accent-active);transform:translateY(0)}
.btn-outline{background:transparent;border:1px solid rgba(255,255,255,.6);color:var(--text-main)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);background:rgba(255,174,61,.08);transform:translateY(-2px)}
.btn:focus-visible{outline:3px solid rgba(255,174,61,.45);outline-offset:2px}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.badge-chip{display:inline-flex;align-items:center;padding:5px 14px;font-size:.75rem;font-weight:600;letter-spacing:.03em;background:rgba(42,212,178,.12);color:var(--secondary);border-radius:var(--radius-pill);border:1px solid rgba(42,212,178,.25)}
.custom-nav{height:72px;background:rgba(11,15,20,.92);padding:0;border-bottom:1px solid transparent;transition:background .3s,border .3s,box-shadow .3s;backdrop-filter:blur(10px);z-index:1000}
.custom-nav.scrolled{background:rgba(11,15,20,.98);border-bottom:1px solid var(--border);box-shadow:0 4px 24px rgba(0,0,0,.3)}
.nav-inner{display:flex;align-items:center;gap:20px;height:72px;position:relative}
.brand-logo{display:flex;align-items:center;gap:10px;flex-shrink:0;text-decoration:none}
.brand-logo:hover .brand-text{color:var(--accent)}
.brand-icon{width:40px;height:40px;background:var(--accent);color:var(--bg-page);border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.2rem;flex-shrink:0}
.brand-text{font-size:1.25rem;font-weight:700;color:var(--text-main);letter-spacing:.02em;transition:color .3s}
.nav-search{flex:1;max-width:560px;display:flex;align-items:center;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-pill);height:44px;padding:0 8px 0 16px;transition:border-color .3s,box-shadow .3s}
.nav-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,174,61,.15)}
.search-icon{color:var(--text-muted);flex-shrink:0}
.nav-search input{flex:1;border:none;background:transparent;color:var(--text-main);padding:0 12px;font-size:.9rem;outline:none;min-width:0}
.nav-search input::placeholder{color:var(--text-muted)}
.search-divider{width:1px;height:20px;background:var(--border);margin:0 6px}
.search-btn{background:transparent;border:none;color:var(--accent);font-weight:600;padding:6px 12px;border-radius:var(--radius-pill);cursor:pointer;transition:background .3s;font-size:.875rem}
.search-btn:hover{background:rgba(255,174,61,.12)}
.nav-links{display:flex;align-items:center;gap:4px;flex-shrink:0}
.nav-links a{color:var(--text-muted);font-size:.9rem;font-weight:500;padding:8px 12px;position:relative;border-radius:8px;transition:color .3s;white-space:nowrap}
.nav-links a:hover{color:var(--text-main)}
.nav-links a.active{color:var(--accent);font-weight:600}
.nav-links a.active::after{content:'';position:absolute;left:12px;right:12px;bottom:0;height:2px;background:var(--accent);border-radius:2px}
.nav-toggle{display:none;background:transparent;border:none;width:40px;height:40px;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;border-radius:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text-main);border-radius:2px;transition:all .3s}
.nav-toggle:hover span{background:var(--accent)}
.mobile-nav-panel{background:var(--bg-page);border-bottom:1px solid var(--border);padding:16px 20px 24px}
.mobile-nav-search{display:flex;align-items:center;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-pill);padding:0 16px;height:44px}
.mobile-nav-search input{flex:1;background:transparent;border:none;color:var(--text-main);outline:none;font-size:.9rem}
.mobile-nav-links{display:flex;flex-direction:column;gap:4px;margin-top:12px}
.mobile-nav-links a{color:var(--text-main);padding:10px 12px;border-radius:10px;font-size:1rem;transition:background .3s,color .3s}
.mobile-nav-links a:hover{background:var(--bg-card);color:var(--accent)}
.mobile-nav-links a.active{color:var(--accent);background:rgba(255,174,61,.06)}
.article-hero{padding:56px 0 42px;background:linear-gradient(120deg,rgba(11,15,20,.96) 0%,rgba(18,25,34,.9) 60%,rgba(26,36,48,.82) 100%),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;border-bottom:1px solid var(--border)}
.article-breadcrumb{display:flex;align-items:center;gap:8px;font-size:.875rem;color:var(--text-muted);margin-bottom:20px;flex-wrap:wrap}
.article-breadcrumb a{color:var(--text-muted);transition:color .3s}
.article-breadcrumb a:hover{color:var(--accent)}
.bc-sep{color:rgba(255,255,255,.25)}
.bc-current{color:var(--text-muted);max-width:320px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.article-hero-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.article-category-badge{display:inline-flex;align-items:center;padding:5px 14px;font-size:.75rem;font-weight:700;letter-spacing:.04em;background:rgba(255,174,61,.14);color:var(--accent);border-radius:var(--radius-pill);border:1px solid rgba(255,174,61,.3)}
.article-hero-brand{font-size:.75rem;color:var(--text-muted);letter-spacing:.05em;display:inline-flex;align-items:center;gap:4px}
.article-h1{font-size:clamp(1.6rem,3vw,2.4rem);font-weight:800;line-height:1.2;color:var(--text-main);letter-spacing:.02em;max-width:860px;margin:0 0 12px}
.article-sub-meta{display:flex;align-items:center;gap:18px;color:var(--text-muted);font-size:.875rem}
.article-sub-meta span{display:inline-flex;align-items:center;gap:6px}
.article-main{padding:48px 0 32px}
.article-main .container{max-width:860px}
.article-content-wrap{background:transparent}
.article-content{font-size:1rem;line-height:1.75;color:var(--text-main)}
.article-content p{margin:0 0 1.4rem}
.article-content h2{font-size:1.55rem;font-weight:700;margin:2.4rem 0 1rem;color:var(--text-main);letter-spacing:.01em}
.article-content h3{font-size:1.25rem;font-weight:700;margin:2rem 0 .8rem;color:var(--text-main)}
.article-content img{border-radius:var(--radius-md);aspect-ratio:16/10;object-fit:cover;width:100%;margin:1.5rem 0}
.article-content blockquote{border-left:4px solid var(--accent);background:var(--bg-card);padding:16px 20px;margin:1.5rem 0;border-radius:0 var(--radius-md) var(--radius-md) 0;color:var(--text-muted)}
.article-content blockquote p{margin:0}
.article-content ul,.article-content ol{margin:0 0 1.4rem;padding-left:20px}
.article-content li{margin-bottom:.5rem}
.article-content a{color:var(--secondary);text-decoration:underline;text-underline-offset:3px}
.article-content a:hover{color:var(--accent)}
.article-content strong{color:var(--text-main);font-weight:700}
.article-content hr{border:none;height:1px;background:var(--border);margin:2rem 0}
.article-content code{background:var(--bg-input);border-radius:6px;padding:2px 8px;font-size:.9em;color:var(--accent)}
.article-tags{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:28px 0 8px;border-top:1px solid var(--border);margin-top:36px}
.tag-label{font-size:.875rem;color:var(--text-muted)}
.article-tags .tag{display:inline-flex;align-items:center;padding:6px 14px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-pill);color:var(--text-muted);font-size:.75rem;font-weight:500;transition:all .3s}
.article-tags .tag:hover{border-color:var(--accent);color:var(--accent)}
.article-prev-next{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}
.article-prev-next a{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;display:flex;flex-direction:column;gap:6px;transition:all .3s}
.article-prev-next a:hover{border-color:rgba(255,174,61,.35);box-shadow:var(--glow-hover);transform:translateY(-2px)}
.pn-label{font-size:.75rem;color:var(--accent);font-weight:600;letter-spacing:.05em}
.pn-title{font-size:.95rem;color:var(--text-main);font-weight:500;line-height:1.5}
.article-not-found{text-align:center;padding:72px 24px;background:var(--bg-card);border-radius:var(--radius-lg);border:1px solid var(--border)}
.article-not-found h2{font-size:1.5rem;font-weight:700;margin-bottom:8px}
.article-not-found p{color:var(--text-muted);margin-bottom:16px}
.related-section{padding:56px 0 32px}
.section-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:28px}
.section-head h2{font-size:1.85rem;font-weight:700;color:var(--text-main);margin:0;display:flex;align-items:center;gap:12px;letter-spacing:.01em}
.section-head h2::before{content:'';width:4px;height:22px;background:var(--accent);border-radius:4px}
.section-head a{color:var(--secondary);font-size:.875rem;font-weight:500;transition:all .3s}
.section-head a:hover{color:var(--accent)}
.related-card{display:block;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;transition:all .3s;height:100%}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--glow-hover);border-color:rgba(255,174,61,.35)}
.related-cover{aspect-ratio:16/10;overflow:hidden;position:relative;background:var(--bg-input)}
.related-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.related-card:hover .related-cover img{transform:scale(1.04)}
.related-tag{position:absolute;top:12px;left:12px;background:rgba(11,15,20,.85);border:1px solid rgba(255,255,255,.12);color:var(--text-main);padding:3px 12px;font-size:.75rem;border-radius:var(--radius-pill);backdrop-filter:blur(4px)}
.related-body{padding:20px}
.related-body h4{font-size:1rem;font-weight:700;color:var(--text-main);margin:0 0 8px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-link{display:inline-flex;align-items:center;gap:6px;color:var(--secondary);font-size:.875rem;font-weight:500;transition:gap .3s}
.related-card:hover .related-link{gap:10px;color:var(--accent)}
.faq-section{padding:56px 0}
.custom-accordion .accordion-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);margin-bottom:16px;overflow:hidden}
.custom-accordion .accordion-item:first-of-type,.custom-accordion .accordion-item:last-of-type{border-radius:var(--radius-md)}
.custom-accordion .accordion-button{background:transparent;color:var(--text-main);font-weight:600;font-size:1rem;padding:18px 24px;box-shadow:none;display:flex;align-items:center;gap:12px;transition:background .3s}
.custom-accordion .accordion-button:not(.collapsed){background:rgba(255,174,61,.04);color:var(--accent)}
.custom-accordion .accordion-button:hover{background:rgba(255,174,61,.06)}
.custom-accordion .accordion-button::after{background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23FFAE3D'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");transition:transform .3s ease}
.custom-accordion .accordion-button:not(.collapsed)::after{transform:rotate(-180deg)}
.custom-accordion .accordion-body{padding:0 24px 20px;color:var(--text-muted);font-size:.925rem;line-height:1.75;background:transparent}
.cta-section{padding:56px 0}
.cta-inner{position:relative;background:radial-gradient(circle at 70% 60%,rgba(255,174,61,.18),transparent 55%),linear-gradient(120deg,rgba(18,25,34,.96),rgba(11,15,20,.92)),url('/assets/images/backpic/back-3.png') center/cover no-repeat;border:1px solid var(--border);border-radius:var(--radius-lg);padding:64px 48px;text-align:center;overflow:hidden}
.cta-inner h2{font-size:1.85rem;font-weight:700;margin:0 0 12px;color:var(--text-main)}
.cta-inner p{color:var(--text-muted);margin:0 0 28px;font-size:1rem}
.cta-buttons{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.site-footer{background:#080C10;border-top:1px solid var(--border);padding:56px 0 0}
.footer-top{padding-bottom:40px}
.footer-brand-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand-logo .brand-icon{width:36px;height:36px;background:var(--accent);color:var(--bg-page);border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:800}
.footer-brand-logo .brand-text{font-size:1.15rem;font-weight:700;color:var(--text-main)}
.footer-top p{color:var(--text-muted);font-size:.875rem;margin:0;max-width:320px}
.footer-col-title{font-size:.875rem;font-weight:700;color:var(--text-main);margin-bottom:16px;letter-spacing:.05em}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:var(--text-muted);font-size:.875rem;transition:all .3s}
.footer-links a:hover{color:var(--accent);padding-left:4px}
.footer-contact-item{display:flex;align-items:flex-start;gap:10px;color:var(--text-muted);font-size:.875rem;margin-bottom:14px;line-height:1.6}
.footer-contact-item svg{flex-shrink:0;margin-top:4px;color:var(--accent)}
.footer-bottom{border-top:1px solid var(--border);padding:20px 0;background:#070B0F}
.footer-copyright{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--text-muted);font-size:.8125rem}
.footer-copyright a{color:var(--text-muted)}
.footer-copyright a:hover{color:var(--accent)}
@media(max-width:991.98px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-search{display:none}
  .nav-inner{justify-content:space-between}
  .cta-inner{padding:48px 24px}
}
@media(max-width:767.98px){
  body{padding-top:64px}
  .custom-nav,.nav-inner{height:64px}
  .article-hero{padding:36px 0 28px}
  .article-h1{font-size:1.6rem}
  .article-prev-next{grid-template-columns:1fr}
  .cta-inner h2{font-size:1.5rem}
  .footer-copyright{flex-direction:column;text-align:center}
  .section-head h2{font-size:1.4rem}
}
@media(max-width:575.98px){
  .brand-text{font-size:1.05rem}
  .brand-icon{width:34px;height:34px;font-size:1rem;border-radius:8px}
  .article-hero{padding:28px 0 24px}
  .article-breadcrumb{font-size:.8125rem}
  .article-sub-meta{flex-wrap:wrap;gap:10px;font-size:.8125rem}
  .article-content-wrap{padding:0}
  .related-cover{aspect-ratio:16/10}
  .cta-inner{padding:40px 20px;border-radius:16px}
  .cta-buttons .btn{width:100%}
}

/* roulang page: category2 */
/* ============ Design Tokens ============ */
        :root {
            --bg-primary: #0B0F14;
            --bg-card: #121922;
            --bg-input: #1A2430;
            --accent-primary: #FFAE3D;
            --accent-primary-hover: #FFC36E;
            --accent-primary-active: #E89B28;
            --accent-secondary: #2AD4B2;
            --text-primary: #F2F6F8;
            --text-secondary: #8CA0B0;
            --border-color: rgba(255, 255, 255, 0.08);
            --success: #3DBE7C;
            --danger: #F36060;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.45);
            --radius-lg: 20px;
            --radius-sm: 12px;
            --radius-round: 999px;
            --transition: 0.3s ease;
        }

        /* ============ Reset / Base ============ */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .3s ease;
        }
        a:hover {
            color: var(--accent-primary);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
        }

        /* ============ Navigation ============ */
        .custom-nav {
            background: rgba(11, 15, 20, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            min-height: 72px;
            padding: 12px 0;
            transition: background .4s ease, box-shadow .4s ease;
            z-index: 1040;
        }
        .custom-nav.scrolled {
            background: rgba(11, 15, 20, 0.92);
            border-bottom-color: var(--border-color);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--accent-primary);
            color: #0B0F14;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(255, 174, 61, 0.3);
        }
        .brand-text {
            font-size: 1.3rem;
            font-weight: 700;
            letter-spacing: .02em;
            color: var(--text-primary);
        }
        .nav-search {
            flex: 1;
            max-width: 560px;
            height: 44px;
            background: var(--bg-input);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-round);
            display: flex;
            align-items: center;
            padding: 0 6px 0 18px;
            transition: border-color .3s, box-shadow .3s;
        }
        .nav-search:focus-within {
            border-color: var(--accent-primary);
            box-shadow: 0 0 0 4px rgba(255, 174, 61, 0.12);
        }
        .nav-search .search-icon {
            color: var(--text-secondary);
            flex-shrink: 0;
        }
        .nav-search input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: .875rem;
            padding: 0 12px;
            height: 100%;
        }
        .nav-search input::placeholder {
            color: var(--text-secondary);
            opacity: .8;
        }
        .nav-search .search-divider {
            width: 1px;
            height: 20px;
            background: rgba(255, 255, 255, 0.15);
            margin: 0 6px;
        }
        .nav-search .search-btn {
            background: transparent;
            border: none;
            color: var(--accent-primary);
            font-size: .875rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-round);
            cursor: pointer;
            transition: background .3s, color .3s;
        }
        .nav-search .search-btn:hover {
            background: rgba(255, 174, 61, 0.1);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .nav-links a {
            padding: 8px 15px;
            font-size: .9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-round);
            position: relative;
            transition: color .3s, background .3s;
        }
        .nav-links a:hover {
            color: var(--accent-primary);
            background: rgba(255, 174, 61, 0.06);
        }
        .nav-links a.active {
            color: var(--accent-primary);
            background: rgba(255, 174, 61, 0.08);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            left: 15px;
            right: 15px;
            bottom: 0;
            height: 2px;
            background: var(--accent-primary);
            border-radius: 2px;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: border-color .3s, background .3s;
        }
        .nav-toggle:hover {
            border-color: var(--accent-primary);
        }
        .nav-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: background .3s;
        }
        .nav-toggle:hover span {
            background: var(--accent-primary);
        }
        .mobile-nav {
            padding: 0;
            background: transparent;
        }
        .mobile-nav .mobile-nav-inner {
            background: rgba(11, 15, 20, 0.98);
            border-bottom: 1px solid var(--border-color);
            padding: 18px 20px 24px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .mobile-nav .mobile-search {
            display: flex;
            align-items: center;
            background: var(--bg-input);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-round);
            padding: 0 18px;
            height: 44px;
            margin-bottom: 14px;
        }
        .mobile-nav .mobile-search input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: .875rem;
            padding-left: 10px;
        }
        .mobile-nav .mobile-search input::placeholder {
            color: var(--text-secondary);
        }
        .mobile-nav a {
            display: block;
            padding: 10px 18px;
            font-size: .95rem;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: background .3s, color .3s;
        }
        .mobile-nav a:hover,
        .mobile-nav a.active {
            color: var(--accent-primary);
            background: rgba(255, 174, 61, 0.06);
        }

        /* ============ Category Hero ============ */
        .category-hero {
            position: relative;
            padding: 160px 0 80px;
            background: linear-gradient(135deg, rgba(11, 15, 20, 0.93), rgba(11, 15, 20, 0.72)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-bottom: 1px solid var(--border-color);
        }
        .category-hero .breadcrumb {
            background: transparent;
            padding: 0;
            margin-bottom: 18px;
        }
        .category-hero .breadcrumb-item,
        .category-hero .breadcrumb-item a {
            color: var(--text-secondary);
            font-size: .85rem;
        }
        .category-hero .breadcrumb-item.active {
            color: var(--accent-primary);
        }
        .category-hero .breadcrumb-item+.breadcrumb-item::before {
            color: var(--text-secondary);
            content: "›";
        }
        .category-hero h1 {
            font-size: clamp(2rem, 5vw, 3.6rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: .03em;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .category-hero .hero-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 36px;
        }
        .hero-feature-row {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 12px;
        }
        .hero-feature-item {
            background: rgba(18, 25, 34, 0.75);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 14px 22px;
            display: flex;
            align-items: center;
            gap: 12px;
            backdrop-filter: blur(8px);
        }
        .hero-feature-item svg {
            color: var(--accent-primary);
            flex-shrink: 0;
        }
        .hero-feature-item span {
            font-size: .85rem;
            color: var(--text-secondary);
        }

        /* ============ Filter Bar ============ */
        .filter-bar {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            margin-top: -36px;
            position: relative;
            z-index: 5;
            padding: 20px 30px;
            box-shadow: var(--shadow-card);
        }
        .filter-bar .filter-inner {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
        }
        .filter-item {
            display: inline-block;
            padding: 8px 20px;
            border-radius: var(--radius-round);
            font-size: .85rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-primary);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all .3s ease;
        }
        .filter-item:hover {
            color: var(--accent-primary);
            border-color: var(--accent-primary);
        }
        .filter-item.active {
            background: var(--accent-primary);
            color: #0B0F14;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(255, 174, 61, 0.3);
        }

        /* ============ Alternate Blocks ============ */
        .alternate-section {
            padding: 88px 0 20px;
        }
        .alt-block {
            display: flex;
            align-items: center;
            gap: 60px;
            margin-bottom: 88px;
        }
        .alt-block.reverse {
            flex-direction: row-reverse;
        }
        .alt-image {
            flex: 0 0 48%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
            box-shadow: var(--shadow-card);
        }
        .alt-image img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .alt-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(11, 15, 20, 0.3));
        }
        .alt-block:hover .alt-image img {
            transform: scale(1.04);
        }
        .alt-content {
            flex: 1;
        }
        .alt-content .alt-tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(42, 212, 178, 0.12);
            color: var(--accent-secondary);
            border-radius: var(--radius-round);
            font-size: .75rem;
            font-weight: 600;
            letter-spacing: .04em;
            margin-bottom: 12px;
        }
        .alt-content h2 {
            font-size: 1.75rem;
            font-weight: 700;
            letter-spacing: .02em;
            margin-bottom: 14px;
            color: var(--text-primary);
        }
        .alt-content p {
            color: var(--text-secondary);
            font-size: .95rem;
            line-height: 1.8;
            margin-bottom: 18px;
        }
        .alt-points {
            list-style: none;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
        }
        .alt-points li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: .85rem;
            color: var(--text-primary);
        }
        .alt-points li svg {
            width: 16px;
            height: 16px;
            color: var(--accent-primary);
            flex-shrink: 0;
        }

        /* ============ Section Head ============ */
        .section-head {
            margin-bottom: 40px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .section-head .head-left {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .section-head .head-bar {
            width: 4px;
            height: 28px;
            background: var(--accent-primary);
            border-radius: 2px;
        }
        .section-head h2 {
            font-size: 1.85rem;
            font-weight: 700;
            letter-spacing: .02em;
            margin: 0;
            color: var(--text-primary);
        }

        /* ============ Product / Card Grid ============ */
        .product-cards-section {
            padding: 48px 0 40px;
        }
        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .product-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform .35s ease, box-shadow .35s ease;
            display: flex;
            flex-direction: column;
        }
        .product-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 174, 61, 0.2);
        }
        .product-card .card-cover {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/10;
        }
        .product-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .product-card:hover .card-cover img {
            transform: scale(1.05);
        }
        .card-badge {
            position: absolute;
            top: 14px;
            right: 14px;
            background: var(--accent-primary);
            color: #0B0F14;
            font-size: .75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-round);
            letter-spacing: .04em;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
        }
        .card-badge.badge-cool {
            background: var(--accent-secondary);
            color: #0B0F14;
        }
        .product-card .card-body {
            padding: 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .product-card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .product-card .card-body p {
            font-size: .875rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            flex-grow: 1;
        }
        .product-card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 14px;
        }
        .product-card .card-tags span {
            font-size: .7rem;
            padding: 3px 10px;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-secondary);
            border-radius: var(--radius-round);
            letter-spacing: .02em;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: .875rem;
            font-weight: 600;
            color: var(--accent-primary);
            transition: gap .3s ease;
        }
        .card-link:hover {
            gap: 12px;
            color: var(--accent-primary-hover);
        }
        .card-link svg {
            width: 16px;
            height: 16px;
        }

        /* ============ FAQ ============ */
        .faq-section {
            padding: 88px 0;
        }
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-accordion .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: none;
            transition: border-color .3s, box-shadow .3s;
        }
        .faq-accordion .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: rgba(255, 174, 61, 0.3);
            box-shadow: 0 4px 24px rgba(255, 174, 61, 0.04);
        }
        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: .95rem;
            padding: 18px 22px;
            box-shadow: none;
            border-bottom: 1px solid transparent;
            transition: color .3s, border-color .3s;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--accent-primary);
            border-bottom-color: var(--border-color);
            background: rgba(255, 174, 61, 0.02);
        }
        .faq-accordion .accordion-button::after {
            background-image: none;
            content: '+';
            font-size: 1.4rem;
            color: var(--accent-primary);
            transform: none;
            transition: transform .3s ease;
            width: auto;
            height: auto;
            line-height: 1;
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }
        .faq-accordion .accordion-body {
            padding: 18px 22px;
            color: var(--text-secondary);
            font-size: .875rem;
            line-height: 1.75;
        }
        .faq-accordion .accordion-item:hover {
            border-color: rgba(255, 174, 61, 0.25);
        }

        /* ============ CTA ============ */
        .cta-section {
            padding: 88px 0;
            position: relative;
            background: linear-gradient(135deg, rgba(11, 15, 20, 0.94), rgba(11, 15, 20, 0.8)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-top: 1px solid var(--border-color);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 480px;
            height: 480px;
            background: rgba(255, 174, 61, 0.05);
            border-radius: 50%;
            filter: blur(80px);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.2rem);
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: .02em;
        }
        .cta-inner p {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-bottom: 30px;
            line-height: 1.75;
        }
        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-primary);
            color: #0B0F14;
            font-weight: 700;
            font-size: .95rem;
            padding: 14px 32px;
            border-radius: var(--radius-round);
            border: none;
            cursor: pointer;
            transition: background .3s, transform .3s, box-shadow .3s;
            text-decoration: none;
        }
        .btn-primary:hover {
            background: var(--accent-primary-hover);
            transform: translateY(-2px);
            color: #0B0F14;
            box-shadow: 0 8px 28px rgba(255, 174, 61, 0.3);
        }
        .btn-primary:active {
            background: var(--accent-primary-active);
            transform: translateY(0);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: .95rem;
            padding: 14px 32px;
            border-radius: var(--radius-round);
            border: 1px solid rgba(255, 255, 255, 0.3);
            cursor: pointer;
            transition: border-color .3s, color .3s, background .3s, transform .3s;
            text-decoration: none;
        }
        .btn-secondary:hover {
            border-color: var(--accent-primary);
            color: var(--accent-primary);
            background: rgba(255, 174, 61, 0.06);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }

        /* ============ Footer ============ */
        .site-footer {
            background: #080C10;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 64px;
        }
        .footer-brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand-logo .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            font-size: 18px;
        }
        .footer-brand-logo .brand-text {
            font-size: 1.2rem;
        }
        .footer-brand-logo {
            margin-bottom: 14px;
        }
        .site-footer p {
            font-size: .85rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .footer-col-title {
            font-size: .875rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: .04em;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            font-size: .85rem;
            color: var(--text-secondary);
            transition: color .3s, padding-left .3s;
        }
        .footer-links a:hover {
            color: var(--accent-primary);
            padding-left: 4px;
        }
        .footer-contact-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: .85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .footer-contact-item svg {
            color: var(--accent-secondary);
            flex-shrink: 0;
            margin-top: 3px;
        }
        .footer-bottom {
            background: #06090D;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: 18px 0;
            margin-top: 48px;
        }
        .footer-bottom p {
            margin: 0;
            font-size: .8rem;
            color: rgba(140, 160, 176, 0.7);
            text-align: center;
        }
        .footer-bottom a {
            color: rgba(140, 160, 176, 0.7);
        }
        .footer-bottom a:hover {
            color: var(--accent-primary);
        }

        /* ============ Responsive ============ */
        @media (max-width: 991px) {
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-search {
                max-width: 300px;
            }
        }
        @media (max-width: 768px) {
            .nav-inner {
                gap: 12px;
            }
            .nav-search {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .category-hero {
                padding: 130px 0 60px;
            }
            .hero-feature-row {
                flex-direction: column;
                align-items: flex-start;
            }
            .filter-bar {
                margin-top: -24px;
                padding: 16px 20px;
            }
            .alt-block,
            .alt-block.reverse {
                flex-direction: column;
                gap: 24px;
                margin-bottom: 56px;
            }
            .alt-image {
                flex: none;
                width: 100%;
            }
            .product-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .alternate-section {
                padding: 56px 0 10px;
            }
            .faq-section {
                padding: 56px 0;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-buttons {
                flex-direction: column;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .section-head h2 {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 576px) {
            .brand-text {
                font-size: 1.1rem;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 17px;
            }
            .nav-inner {
                min-height: 60px;
            }
            .category-hero h1 {
                font-size: 1.9rem;
            }
            .category-hero .hero-desc {
                font-size: .9rem;
            }
            .hero-feature-item {
                padding: 10px 16px;
                font-size: .8rem;
            }
            .filter-bar .filter-inner {
                gap: 6px;
            }
            .filter-item {
                padding: 6px 14px;
                font-size: .78rem;
            }
            .alt-content h2 {
                font-size: 1.3rem;
            }
            .alt-content p {
                font-size: .875rem;
            }
            .section-head {
                margin-bottom: 24px;
            }
            .footer-contact-item {
                font-size: .8rem;
            }
        }

/* roulang page: category3 */
:root{
  --bg-primary:#0B0F14;
  --bg-card:#121922;
  --bg-input:#1A2430;
  --accent:#FFAE3D;
  --accent-hover:#FFC36E;
  --accent-active:#E89B28;
  --accent-cyan:#2AD4B2;
  --text-primary:#F2F6F8;
  --text-muted:#8CA0B0;
  --border:rgba(255,255,255,.08);
  --radius-card:12px;
  --radius-panel:20px;
  --radius-pill:999px;
  --shadow-card:0 8px 30px rgba(0,0,0,.25);
  --shadow-hover:0 16px 48px rgba(0,0,0,.45);
  --font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;scroll-padding-top:80px;}
body{
  font-family:var(--font-family);
  background:var(--bg-primary);
  color:var(--text-primary);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none;transition:color .25s ease;}
a:hover{color:var(--accent-hover);}
img{max-width:100%;display:block;}
button{font-family:inherit;border:none;background:none;cursor:pointer;}
input,textarea{font-family:inherit;}
.container{max-width:1280px;padding-left:20px;padding-right:20px;}
section{position:relative;}

/* ===== Buttons ===== */
.btn{
  border-radius:var(--radius-pill);
  padding:14px 32px;
  font-weight:700;
  font-size:.95rem;
  line-height:1.2;
  transition:all .3s ease;
  display:inline-flex;
  align-items:center;
  gap:6px;
  border:1px solid transparent;
}
.btn-primary{
  background:var(--accent);
  color:var(--bg-primary);
  border-color:var(--accent);
}
.btn-primary:hover{
  background:var(--accent-hover);
  color:var(--bg-primary);
  transform:translateY(-2px);
  box-shadow:0 8px 24px rgba(255,174,61,.25);
}
.btn-primary:active{
  background:var(--accent-active) !important;
  transform:translateY(0);
}
.btn-outline-light{
  background:transparent;
  border-color:rgba(255,255,255,.6);
  color:var(--text-primary);
}
.btn-outline-light:hover{
  border-color:var(--accent);
  color:var(--accent);
  background:rgba(255,174,61,.08);
  transform:translateY(-2px);
}
.btn:focus-visible{
  outline:3px solid rgba(255,174,61,.4);
  outline-offset:2px;
}

/* ===== Section head ===== */
.section-head{
  margin-bottom:44px;
}
.section-head .section-eyebrow{
  display:inline-block;
  font-size:.8rem;
  font-weight:600;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--accent-cyan);
  margin-bottom:8px;
}
.section-head h2{
  font-size:1.85rem;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.3;
  margin:0 0 10px;
}
.section-head p{
  color:var(--text-muted);
  font-size:1rem;
  max-width:640px;
  margin:0;
}

/* ===== Navbar ===== */
.custom-nav{
  background:rgba(11,15,20,.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  min-height:72px;
  padding:0;
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
  z-index:1050;
}
.custom-nav.scrolled{
  background:rgba(11,15,20,.92);
  border-bottom-color:var(--border);
  box-shadow:0 4px 24px rgba(0,0,0,.3);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:72px;
  position:relative;
}
.brand-logo{
  display:flex;
  align-items:center;
  gap:8px;
  flex-shrink:0;
}
.brand-icon{
  width:36px;
  height:36px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--accent);
  color:var(--bg-primary);
  font-weight:800;
  border-radius:9px;
  font-size:1.05rem;
  letter-spacing:0;
}
.brand-text{
  font-size:1.2rem;
  font-weight:700;
  color:var(--text-primary);
  letter-spacing:.02em;
  white-space:nowrap;
}
.nav-search{
  flex:1;
  max-width:560px;
  display:flex;
  align-items:center;
  height:44px;
  background:var(--bg-input);
  border-radius:var(--radius-pill);
  padding:0 8px 0 16px;
  border:2px solid rgba(255,255,255,.08);
  transition:border-color .3s ease,box-shadow .3s ease;
}
.nav-search:focus-within{
  border-color:var(--accent);
  box-shadow:0 0 0 4px rgba(255,174,61,.15);
}
.search-icon{color:var(--text-muted);flex-shrink:0;display:block;}
.nav-search input{
  flex:1;
  background:transparent;
  border:none;
  outline:none;
  color:var(--text-primary);
  padding:0 10px;
  font-size:.9rem;
  min-width:0;
}
.nav-search input::placeholder{color:var(--text-muted);}
.search-divider{
  width:1px;
  height:22px;
  background:rgba(255,255,255,.12);
  margin:0 4px;
  flex-shrink:0;
}
.search-btn{
  background:transparent;
  color:var(--accent);
  font-weight:600;
  font-size:.875rem;
  padding:6px 12px;
  border-radius:var(--radius-pill);
  transition:color .25s ease,background .25s ease;
  flex-shrink:0;
}
.search-btn:hover{color:var(--accent-hover);background:rgba(255,174,61,.08);}
.nav-links{
  display:flex;
  align-items:center;
  gap:2px;
  margin-left:auto;
}
.nav-links a{
  color:var(--text-muted);
  font-size:.925rem;
  font-weight:500;
  padding:8px 12px;
  border-radius:8px;
  position:relative;
  transition:color .25s ease;
  white-space:nowrap;
}
.nav-links a:hover{color:var(--text-primary);}
.nav-links a.active{
  color:var(--accent);
  font-weight:600;
}
.nav-links a.active::after{
  content:'';
  position:absolute;
  left:12px;
  right:12px;
  bottom:0;
  height:2px;
  background:var(--accent);
  border-radius:2px;
}
.nav-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  padding:8px 6px;
  flex-shrink:0;
}
.nav-toggle span{
  width:22px;
  height:2px;
  background:var(--text-primary);
  border-radius:2px;
  transition:background .3s ease;
}
.nav-toggle:hover span{background:var(--accent);}
.mobile-nav-panel{
  background:var(--bg-card);
  border-bottom:1px solid var(--border);
  padding:18px 20px 20px;
  display:none;
}
.mobile-nav-panel.show{display:block;}
.mobile-nav-search{
  display:flex;
  align-items:center;
  gap:8px;
  background:var(--bg-input);
  border-radius:var(--radius-pill);
  padding:0 10px 0 16px;
  height:44px;
  border:2px solid rgba(255,255,255,.08);
  margin-bottom:14px;
}
.mobile-nav-search input{
  flex:1;
  background:transparent;
  border:none;
  outline:none;
  color:var(--text-primary);
  font-size:.9rem;
  min-width:0;
}
.mobile-nav-search input::placeholder{color:var(--text-muted);}
.mobile-nav-search .search-btn{
  color:var(--accent);
  font-weight:600;
  font-size:.875rem;
  padding:6px 10px;
}
.mobile-nav-links{
  display:flex;
  flex-direction:column;
  gap:2px;
}
.mobile-nav-links a{
  padding:11px 14px;
  border-radius:10px;
  color:var(--text-muted);
  font-size:.95rem;
  transition:all .25s ease;
}
.mobile-nav-links a:hover{color:var(--text-primary);background:rgba(255,255,255,.04);}
.mobile-nav-links a.active{
  color:var(--accent);
  background:rgba(255,174,61,.08);
  font-weight:600;
}

/* ===== Category hero ===== */
.category-hero{
  padding:150px 0 80px;
  background:
    linear-gradient(135deg,rgba(11,15,20,.97) 0%,rgba(11,15,20,.85) 45%,rgba(11,15,20,.7) 100%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-bottom:1px solid var(--border);
}
.category-hero::after{
  content:'';
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:4px;
  background:linear-gradient(90deg,var(--accent),var(--accent-cyan));
  opacity:.5;
}
.breadcrumb-nav{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:.85rem;
  color:var(--text-muted);
  margin-bottom:18px;
  flex-wrap:wrap;
}
.breadcrumb-nav a{color:var(--text-muted);}
.breadcrumb-nav a:hover{color:var(--accent);}
.breadcrumb-nav .sep{color:rgba(255,255,255,.3);}
.breadcrumb-nav .current{color:var(--accent-cyan);font-weight:500;}
.category-hero h1{
  font-size:clamp(2.2rem,5vw,3.6rem);
  font-weight:800;
  line-height:1.12;
  letter-spacing:.02em;
  margin-bottom:16px;
  color:var(--text-primary);
}
.category-hero .category-desc{
  font-size:1.05rem;
  color:var(--text-muted);
  max-width:580px;
  margin:0;
  line-height:1.7;
}
.hero-meta-strip{
  display:flex;
  gap:12px;
  margin-top:24px;
  flex-wrap:wrap;
}
.hero-meta-item{
  display:flex;
  align-items:center;
  gap:6px;
  font-size:.82rem;
  color:var(--text-muted);
  background:rgba(255,255,255,.04);
  border:1px solid var(--border);
  border-radius:var(--radius-pill);
  padding:6px 16px;
}
.hero-meta-item span{color:var(--accent);font-weight:700;font-variant-numeric:tabular-nums;}

/* ===== Spec section ===== */
.spec-section{
  padding:88px 0;
  background:var(--bg-primary);
}
.spec-panel{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  border-radius:var(--radius-panel);
  overflow:hidden;
  background:var(--bg-card);
  border:1px solid var(--border);
  box-shadow:var(--shadow-card);
}
.spec-image{
  position:relative;
  min-height:300px;
  background:var(--bg-input);
}
.spec-image img{
  width:100%;
  height:100%;
  object-fit:cover;
  min-height:300px;
}
.spec-image-caption{
  position:absolute;
  left:16px;
  bottom:16px;
  background:rgba(11,15,20,.88);
  color:var(--text-primary);
  font-size:.82rem;
  padding:6px 16px;
  border-radius:var(--radius-pill);
  border:1px solid var(--border);
  backdrop-filter:blur(6px);
}
.spec-table-wrap{
  padding:30px 32px 36px;
  overflow-x:auto;
}
.spec-table-wrap .table-note{
  font-size:.875rem;
  color:var(--text-muted);
  margin-bottom:16px;
}
.spec-table{
  width:100%;
  border-collapse:collapse;
  min-width:480px;
}
.spec-table th{
  color:var(--text-muted);
  font-size:.78rem;
  font-weight:600;
  letter-spacing:.06em;
  text-transform:uppercase;
  padding:10px 12px;
  text-align:left;
  border-bottom:1px solid var(--border);
}
.spec-table td{
  padding:14px 12px;
  color:var(--text-primary);
  border-bottom:1px solid var(--border);
  font-size:.925rem;
  vertical-align:top;
  line-height:1.6;
}
.spec-table tr:last-child td{border-bottom:none;}
.spec-table td:first-child{
  font-weight:700;
  color:var(--accent);
  white-space:nowrap;
}
.spec-table tbody tr{
  transition:background .25s ease;
}
.spec-table tbody tr:hover{
  background:rgba(255,174,61,.04);
}

/* ===== Product grid section ===== */
.product-grid-section{
  padding:88px 0;
  background:var(--bg-primary);
  border-top:1px solid var(--border);
}
.product-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;
  height:100%;
  display:flex;
  flex-direction:column;
}
.product-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover),0 0 0 1px rgba(255,174,61,.35);
  border-color:rgba(255,174,61,.35);
}
.card-cover{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--bg-input);
}
.card-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.product-card:hover .card-cover img{transform:scale(1.04);}
.card-badge{
  position:absolute;
  top:12px;
  right:12px;
  background:rgba(11,15,20,.85);
  color:var(--accent);
  font-size:.75rem;
  font-weight:600;
  letter-spacing:.03em;
  padding:4px 14px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(255,174,61,.35);
  backdrop-filter:blur(4px);
}
.card-content{
  padding:20px 22px 22px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.card-content h3{
  font-size:1.2rem;
  font-weight:700;
  margin-bottom:8px;
  line-height:1.4;
  letter-spacing:.01em;
}
.card-content .card-desc{
  color:var(--text-muted);
  font-size:.9rem;
  line-height:1.65;
  flex:1;
  margin-bottom:14px;
}
.card-tags{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  margin-bottom:14px;
}
.card-tags span{
  background:rgba(42,212,178,.1);
  color:var(--accent-cyan);
  font-size:.75rem;
  font-weight:600;
  letter-spacing:.03em;
  padding:4px 12px;
  border-radius:var(--radius-pill);
}
.card-link{
  color:var(--accent);
  font-weight:600;
  font-size:.9rem;
  display:inline-flex;
  align-items:center;
  gap:4px;
  transition:gap .3s ease,color .25s ease;
}
.card-link:hover{
  color:var(--accent-hover);
  gap:8px;
}

/* ===== Scene section ===== */
.scene-section{
  padding:88px 0;
  background:var(--bg-card);
  border-top:1px solid var(--border);
}
.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.scene-item{
  background:var(--bg-primary);
  border:1px solid var(--border);
  border-radius:var(--radius-panel);
  padding:28px 26px;
  transition:border-color .3s ease,box-shadow .3s ease;
}
.scene-item:hover{
  border-color:rgba(255,174,61,.4);
  box-shadow:var(--shadow-card);
}
.scene-icon{
  width:44px;
  height:44px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(255,174,61,.1);
  border-radius:12px;
  color:var(--accent);
  margin-bottom:16px;
}
.scene-item h3{
  font-size:1.1rem;
  font-weight:700;
  margin-bottom:8px;
}
.scene-item p{
  color:var(--text-muted);
  font-size:.9rem;
  line-height:1.65;
  margin:0;
}

/* ===== CTA section ===== */
.cta-section{
  padding:88px 0;
  background:
    radial-gradient(circle at 50% 40%,rgba(255,174,61,.12) 0%,rgba(255,174,61,0) 60%),
    linear-gradient(135deg,rgba(11,15,20,.94),rgba(11,15,20,.88)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-top:1px solid var(--border);
}
.cta-inner{
  text-align:center;
  max-width:680px;
  margin:0 auto;
  padding:20px 0;
}
.cta-inner h2{
  font-size:clamp(1.8rem,4vw,2.6rem);
  font-weight:800;
  letter-spacing:.02em;
  margin-bottom:14px;
}
.cta-inner p{
  color:var(--text-muted);
  font-size:1.02rem;
  margin-bottom:30px;
}
.cta-actions{
  display:flex;
  gap:16px;
  justify-content:center;
  flex-wrap:wrap;
}

/* ===== FAQ section ===== */
.faq-section{
  padding:88px 0;
  background:var(--bg-primary);
}
.faq-wrap{
  max-width:820px;
  margin:0 auto;
}
.custom-accordion .accordion-item{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-card) !important;
  overflow:hidden;
  margin-bottom:16px;
  transition:border-color .3s ease;
}
.custom-accordion .accordion-item:hover{
  border-color:rgba(255,174,61,.25);
}
.custom-accordion .accordion-button{
  background:transparent;
  color:var(--text-primary);
  font-weight:600;
  font-size:1rem;
  padding:18px 20px;
  border:none;
  box-shadow:none;
  transition:background .3s ease,color .3s ease;
}
.custom-accordion .accordion-button:hover{
  background:rgba(255,255,255,.02);
}
.custom-accordion .accordion-button:not(.collapsed){
  background:rgba(255,174,61,.05);
  color:var(--accent);
}
.custom-accordion .accordion-button:focus{
  box-shadow:none;
  border-color:transparent;
}
.custom-accordion .accordion-button::after{
  background-image:none;
  content:'+';
  font-size:1.4rem;
  font-weight:300;
  color:var(--accent);
  width:auto;
  height:auto;
  line-height:1;
  position:relative;
  transition:transform .3s ease;
}
.custom-accordion .accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);
}
.custom-accordion .accordion-body{
  padding:0 20px 20px;
  color:var(--text-muted);
  font-size:.925rem;
  line-height:1.7;
  border-top:1px solid var(--border);
  padding-top:16px;
}

/* ===== Footer ===== */
.site-footer{
  background:#080C10;
  border-top:1px solid var(--border);
  padding:56px 0 0;
}
.footer-top{
  padding-bottom:40px;
}
.footer-brand-logo{
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
}
.footer-brand-logo .brand-icon{
  width:34px;
  height:34px;
  font-size:.95rem;
}
.footer-brand-logo .brand-text{
  font-size:1.15rem;
  font-weight:700;
}
.footer-brand-logo ~ p{
  color:var(--text-muted);
  font-size:.9rem;
  line-height:1.7;
  max-width:300px;
}
.footer-col-title{
  font-size:.95rem;
  font-weight:700;
  color:var(--text-primary);
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-links a{
  color:var(--text-muted);
  font-size:.9rem;
  transition:color .25s ease,padding-left .25s ease;
}
.footer-links a:hover{
  color:var(--accent);
  padding-left:4px;
}
.footer-contact-item{
  display:flex;
  align-items:flex-start;
  gap:10px;
  margin-bottom:14px;
  color:var(--text-muted);
  font-size:.9rem;
  line-height:1.6;
}
.footer-contact-item svg{
  color:var(--accent);
  flex-shrink:0;
  margin-top:4px;
}
.footer-bottom{
  background:#06090D;
  border-top:1px solid var(--border);
  padding:18px 0;
}
.footer-bottom-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  color:var(--text-muted);
  font-size:.82rem;
}

/* ===== Responsive ===== */
@media (max-width:1199.98px){
  .nav-inner{gap:16px;}
  .nav-search{max-width:400px;}
  .nav-links a{padding:8px 10px;font-size:.88rem;}
}
@media (max-width:991.98px){
  .nav-search,
  .nav-links{display:none;}
  .nav-toggle{display:flex;}
  .mobile-nav-panel.show{display:block;}
  .spec-panel{grid-template-columns:1fr;}
  .spec-image{min-height:220px;}
  .spec-image img{min-height:220px;max-height:340px;}
  .scene-grid{grid-template-columns:1fr 1fr;}
  .custom-nav{
    min-height:64px;
  }
  .nav-inner{
    min-height:64px;
    gap:12px;
  }
  .brand-text{font-size:1.1rem;}
  .brand-icon{width:32px;height:32px;font-size:.95rem;}
}
@media (max-width:767.98px){
  .category-hero{
    padding:120px 0 60px;
  }
  .spec-section,
  .product-grid-section,
  .scene-section,
  .cta-section,
  .faq-section{
    padding:56px 0;
  }
  .section-head{
    margin-bottom:32px;
  }
  .cta-actions .btn{
    width:100%;
    justify-content:center;
  }
  .scene-grid{
    grid-template-columns:1fr;
  }
  .spec-table-wrap{
    padding:20px 18px 24px;
  }
  .footer-bottom-inner{
    flex-direction:column;
    text-align:center;
    gap:4px;
  }
}
@media (max-width:575.98px){
  .nav-inner{
    gap:8px;
  }
  .brand-text{
    font-size:1rem;
  }
  .brand-icon{
    width:30px;
    height:30px;
    font-size:.88rem;
    border-radius:8px;
  }
  .category-hero h1{
    font-size:2rem;
  }
  .category-hero .category-desc{
    font-size:.95rem;
  }
  .hero-meta-item{
    padding:5px 12px;
    font-size:.78rem;
  }
  .spec-image-caption{
    font-size:.75rem;
    padding:5px 12px;
  }
  .card-content{
    padding:16px 18px 18px;
  }
  .card-content h3{
    font-size:1.1rem;
  }
  .custom-accordion .accordion-button{
    font-size:.93rem;
    padding:16px 16px;
  }
  .custom-accordion .accordion-body{
    padding:0 16px 16px;
  }
}

/* roulang page: category4 */
/* ========== 设计变量 ========== */
        :root {
            --bg-body: #0B0F14;
            --bg-surface: #121922;
            --bg-input: #1A2430;
            --accent: #FFAE3D;
            --accent-hover: #FFC36E;
            --accent-active: #E89B28;
            --accent-cyan: #2AD4B2;
            --text-main: #F2F6F8;
            --text-muted: #8CA0B0;
            --border: rgba(255, 255, 255, 0.08);
            --success: #3DBE7C;
            --danger: #F36060;
            --radius-lg: 20px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.45);
            --font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
            --section-space: 88px;
            --section-space-mobile: 56px;
        }

        /* ========== Reset & Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.75;
            color: var(--text-main);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color .3s ease;
        }
        a:hover {
            color: var(--accent);
        }
        .container {
            max-width: 1280px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            border-radius: var(--radius-pill);
            padding: 14px 32px;
            font-weight: 700;
            font-size: 1rem;
            line-height: 1.2;
            border: 1px solid transparent;
            transition: all .3s ease;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--accent);
            color: #0B0F14 !important;
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 174, 61, 0.25);
        }
        .btn-primary:active {
            background: var(--accent-active);
            border-color: var(--accent-active);
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-main) !important;
            border-color: rgba(255, 255, 255, 0.6);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent) !important;
            background: rgba(255, 174, 61, 0.08);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 1.05rem;
        }

        /* ========== 顶部导航 ========== */
        .custom-nav {
            min-height: 72px;
            background: rgba(11, 15, 20, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid transparent;
            transition: background .4s ease, border-color .4s ease, box-shadow .4s ease;
            padding: 0;
        }
        .custom-nav.scrolled {
            background: rgba(11, 15, 20, 0.97);
            border-bottom-color: var(--border);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            gap: 24px;
            min-height: 72px;
            flex-wrap: nowrap;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--accent);
            border-radius: 10px;
            color: #0B0F14;
            font-weight: 800;
            font-size: 20px;
        }
        .brand-text {
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-main);
            letter-spacing: .02em;
            white-space: nowrap;
        }
        .nav-search {
            flex: 1;
            display: flex;
            align-items: center;
            max-width: 560px;
            height: 44px;
            background: var(--bg-input);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-pill);
            padding: 0 8px 0 16px;
            gap: 10px;
            transition: border-color .3s, box-shadow .3s;
        }
        .nav-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(255, 174, 61, 0.15);
        }
        .nav-search .search-icon {
            flex-shrink: 0;
            color: var(--text-muted);
        }
        .nav-search input[type="text"] {
            flex: 1;
            min-width: 0;
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 0.925rem;
            font-family: var(--font-family);
        }
        .nav-search input[type="text"]::placeholder {
            color: var(--text-muted);
        }
        .nav-search .search-divider {
            width: 1px;
            height: 18px;
            background: rgba(255, 255, 255, 0.15);
            flex-shrink: 0;
        }
        .nav-search .search-btn {
            background: transparent;
            border: none;
            color: var(--accent);
            font-weight: 700;
            font-size: 0.875rem;
            padding: 6px 12px;
            border-radius: var(--radius-pill);
            cursor: pointer;
            transition: background .3s;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-search .search-btn:hover {
            background: rgba(255, 174, 61, 0.12);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            flex-shrink: 0;
        }
        .nav-links a {
            position: relative;
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 6px 0;
            white-space: nowrap;
            transition: color .3s;
        }
        .nav-links a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform .3s ease;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent);
        }
        .nav-links a.active::after {
            transform: scaleX(1);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            cursor: pointer;
            padding: 10px;
            flex-shrink: 0;
        }
        .nav-toggle span {
            display: block;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
        }
        .mobile-nav-panel {
            background: #0B0F14;
            padding: 0;
            border-top: 1px solid var(--border);
        }
        .mobile-nav-panel .mobile-nav-inner {
            padding: 20px 24px 24px;
        }
        .mobile-search-box {
            display: flex;
            align-items: center;
            height: 44px;
            background: var(--bg-input);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-pill);
            padding: 0 16px;
            gap: 10px;
            margin-bottom: 16px;
        }
        .mobile-search-box input {
            flex: 1;
            min-width: 0;
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 0.95rem;
            font-family: var(--font-family);
        }
        .mobile-search-box input::placeholder {
            color: var(--text-muted);
        }
        .mobile-links {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-links a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            border: 1px solid transparent;
        }
        .mobile-links a:hover,
        .mobile-links a.active {
            color: var(--accent);
            background: rgba(255, 174, 61, 0.06);
            border-color: rgba(255, 174, 61, 0.15);
        }

        /* ========== 分类页顶部 Hero ========== */
        .category-hero {
            position: relative;
            min-height: 420px;
            padding: 150px 0 80px;
            background: linear-gradient(120deg, rgba(11, 15, 20, 0.95) 0%, rgba(18, 25, 34, 0.75) 60%, rgba(18, 25, 34, 0.5) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-bottom: 1px solid var(--border);
        }
        .category-hero .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .category-hero .breadcrumb-nav a {
            color: var(--text-muted);
            transition: color .3s;
        }
        .category-hero .breadcrumb-nav a:hover {
            color: var(--accent);
        }
        .category-hero .breadcrumb-nav .sep {
            color: rgba(255, 255, 255, 0.25);
        }
        .category-hero .breadcrumb-nav .current {
            color: var(--accent);
        }
        .category-hero h1 {
            font-size: clamp(2.2rem, 4.5vw, 3.5rem);
            font-weight: 800;
            letter-spacing: .02em;
            margin: 0 0 16px;
            color: var(--text-main);
        }
        .category-hero .hero-desc {
            color: var(--text-muted);
            font-size: 1.08rem;
            max-width: 680px;
            line-height: 1.8;
            margin: 0;
        }

        /* ========== 区块标题 ========== */
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 44px;
            flex-wrap: wrap;
        }
        .section-head .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: .06em;
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .section-head .section-tag::before {
            content: "";
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .section-head h2 {
            font-size: clamp(1.5rem, 2.5vw, 1.85rem);
            font-weight: 700;
            letter-spacing: .02em;
            margin: 0;
            color: var(--text-main);
        }
        .section-head .section-sub {
            color: var(--text-muted);
            font-size: 0.95rem;
            max-width: 560px;
        }

        /* ========== 交替图文区 ========== */
        .alternate-section {
            padding: var(--section-space) 0;
            background: var(--bg-body);
        }
        .alternate-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
            margin-bottom: 72px;
        }
        .alternate-row:last-child {
            margin-bottom: 0;
        }
        .alternate-row.reverse .alternate-media {
            order: 2;
        }
        .alternate-row.reverse .alternate-content {
            order: 1;
        }
        .alternate-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            aspect-ratio: 4 / 3;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }
        .alternate-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .alternate-media:hover img {
            transform: scale(1.04);
        }
        .alternate-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(11, 15, 20, 0.35) 100%);
            pointer-events: none;
        }
        .alt-step {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background: rgba(255, 174, 61, 0.12);
            color: var(--accent);
            border-radius: 14px;
            font-weight: 800;
            font-size: 1.1rem;
            margin-bottom: 18px;
            letter-spacing: .02em;
        }
        .alternate-content h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 0 16px;
            color: var(--text-main);
            letter-spacing: .02em;
        }
        .alternate-content p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.8;
            margin: 0 0 24px;
        }
        .alt-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .alt-tags span {
            display: inline-flex;
            align-items: center;
            background: rgba(42, 212, 178, 0.08);
            color: var(--accent-cyan);
            border: 1px solid rgba(42, 212, 178, 0.2);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: .03em;
        }

        /* ========== 大卡片区 ========== */
        .solution-section {
            padding: var(--section-space) 0;
            background: #0D1219;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .solution-card {
            background: var(--bg-surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            box-shadow: var(--shadow-card);
            transition: transform .4s ease, box-shadow .4s ease, border-color .4s ease;
        }
        .solution-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover), 0 0 0 1px rgba(255, 174, 61, 0.35);
            border-color: rgba(255, 174, 61, 0.35);
        }
        .solution-card .card-media {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }
        .solution-card .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .solution-card:hover .card-media img {
            transform: scale(1.05);
        }
        .solution-card .card-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(11, 15, 20, 0.4) 100%);
            pointer-events: none;
        }
        .solution-card .card-body {
            padding: 28px 28px 30px;
        }
        .solution-card .card-no {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: .08em;
            color: var(--accent-cyan);
            background: rgba(42, 212, 178, 0.08);
            border: 1px solid rgba(42, 212, 178, 0.2);
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 14px;
        }
        .solution-card h3 {
            font-size: 1.22rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 12px;
            letter-spacing: .02em;
        }
        .solution-card p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.75;
            margin: 0;
        }
        .solution-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 20px;
            color: var(--accent);
            font-weight: 600;
            font-size: 0.9rem;
            transition: gap .3s ease;
        }
        .solution-card .card-link:hover {
            gap: 12px;
            color: var(--accent-hover);
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: var(--section-space) 0;
            background: var(--bg-body);
        }
        .custom-accordion {
            max-width: 850px;
            margin: 0 auto;
        }
        .custom-accordion .accordion-item {
            background: var(--bg-surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
            overflow: hidden;
            transition: border-color .3s, box-shadow .3s;
        }
        .custom-accordion .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: rgba(255, 174, 61, 0.3);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }
        .custom-accordion .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-weight: 600;
            font-size: 1.02rem;
            padding: 20px 24px;
            box-shadow: none;
            font-family: var(--font-family);
            letter-spacing: .01em;
            position: relative;
        }
        .custom-accordion .accordion-button::after {
            background: none;
            content: "+";
            font-size: 1.5rem;
            font-weight: 400;
            color: var(--accent);
            transition: transform .3s ease;
            width: auto;
            height: auto;
            margin-left: auto;
            line-height: 1;
        }
        .custom-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }
        .custom-accordion .accordion-button:not(.collapsed) {
            background: rgba(255, 174, 61, 0.06);
            color: var(--accent);
            box-shadow: inset 3px 0 0 var(--accent);
        }
        .custom-accordion .accordion-button:focus {
            box-shadow: 0 0 0 4px rgba(255, 174, 61, 0.15);
        }
        .custom-accordion .accordion-body {
            color: var(--text-muted);
            padding: 4px 24px 22px;
            font-size: 0.95rem;
            line-height: 1.8;
            border-top: 1px solid var(--border);
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 100px 0;
            background: linear-gradient(90deg, rgba(11, 15, 20, 0.9) 0%, rgba(18, 25, 34, 0.75) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-top: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            top: 50%;
            left: 50%;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(255, 174, 61, 0.12) 0%, transparent 65%);
            transform: translate(-50%, -50%);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 700;
            margin: 0 0 14px;
            letter-spacing: .02em;
            color: var(--text-main);
        }
        .cta-inner p {
            color: var(--text-muted);
            font-size: 1rem;
            margin: 0 0 32px;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-note {
            margin-top: 18px;
            font-size: 0.82rem;
            color: rgba(140, 160, 176, 0.7);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #080C10;
            border-top: 1px solid var(--border);
            padding-top: 64px;
        }
        .site-footer .footer-top {
            padding-bottom: 48px;
        }
        .footer-brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand-logo .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 18px;
        }
        .footer-brand-logo .brand-text {
            font-size: 1.2rem;
        }
        .site-footer .footer-brand-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.75;
            max-width: 320px;
            margin: 0;
        }
        .footer-col-title {
            color: var(--text-main);
            font-weight: 700;
            font-size: 0.95rem;
            margin-bottom: 18px;
            letter-spacing: .02em;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.88rem;
            transition: color .3s, padding-left .3s;
            display: inline-block;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-contact-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text-muted);
            font-size: 0.88rem;
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .footer-contact-item svg {
            color: var(--accent);
            flex-shrink: 0;
            margin-top: 3px;
        }
        .footer-bottom {
            background: #05080B;
            border-top: 1px solid var(--border);
            padding: 20px 0;
        }
        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            color: var(--text-muted);
            font-size: 0.82rem;
        }

        /* ========== 响应式 ========== */
        @media (min-width: 992px) {
            .mobile-nav-panel {
                display: none !important;
            }
        }
        @media (max-width: 991.98px) {
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-search {
                display: none;
            }
            .nav-inner {
                gap: 16px;
            }
            .alternate-row {
                grid-template-columns: 1fr;
                gap: 36px;
                margin-bottom: 56px;
            }
            .alternate-row.reverse .alternate-media {
                order: 1;
            }
            .alternate-row.reverse .alternate-content {
                order: 2;
            }
            .category-hero {
                padding: 130px 0 60px;
                min-height: auto;
            }
        }
        @media (max-width: 767.98px) {
            :root {
                --section-space: var(--section-space-mobile);
            }
            .category-hero {
                padding: 120px 0 48px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero .hero-desc {
                font-size: 0.95rem;
            }
            .section-head {
                margin-bottom: 32px;
                align-items: flex-start;
                flex-direction: column;
                gap: 8px;
            }
            .alternate-content h3 {
                font-size: 1.25rem;
            }
            .alternate-content p {
                font-size: 0.92rem;
            }
            .solution-card .card-body {
                padding: 22px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .footer-bottom-inner {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }
        @media (max-width: 575.98px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }
            .category-hero {
                padding: 110px 0 40px;
            }
            .alt-tags {
                gap: 8px;
            }
            .alt-tags span {
                padding: 5px 12px;
                font-size: 0.76rem;
            }
            .cta-section {
                padding: 64px 0;
            }
        }
        @media (max-width: 400px) {
            .brand-text {
                font-size: 1.05rem;
            }
            .brand-logo {
                gap: 8px;
            }
        }