/* roulang page: index */
:root{
  --bg-deep:#0B0E11;
  --bg-panel:#10151A;
  --bg-card:#151B21;
  --bg-elev:#1A222A;
  --line:rgba(255,255,255,0.08);
  --text-hi:#F0F4F8;
  --text-mid:#A7B2BE;
  --text-low:#6B7A88;
  --primary:#FF2E88;
  --secondary:#22E5C4;
  --accent-violet:#7B6CFF;
  --warn:#FFB547;
  --hr:rgba(255,255,255,0.06);
  --shadow-card:0 8px 30px rgba(0,0,0,0.35);
  --shadow-glow:0 0 24px rgba(255,46,136,0.25);
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:8px;
  --font-sans:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:Inter,"Bahnschrift","DIN Alternate",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  background:var(--bg-deep);
  color:var(--text-hi);
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:radial-gradient(circle at 15% 20%,rgba(255,46,136,0.03),transparent 40%),radial-gradient(circle at 85% 70%,rgba(34,229,196,0.03),transparent 40%);
  pointer-events:none;
  z-index:0;
}
a{color:var(--text-hi);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary)}
img{max-width:100%;height:auto;object-fit:cover}
.container{max-width:1200px;padding-left:24px;padding-right:24px}
.btn{border-radius:var(--radius-sm);font-weight:600;padding:.65rem 1.6rem;transition:all .25s ease;border:1px solid transparent}
.btn-primary{
  background:var(--primary);
  border-color:var(--primary);
  color:#fff;
  box-shadow:0 4px 18px rgba(255,46,136,0.3);
}
.btn-primary:hover{
  background:#ff4fa0;
  border-color:#ff4fa0;
  color:#fff;
  transform:translateY(-1px);
  box-shadow:0 8px 28px rgba(255,46,136,0.4);
}
.btn-outline{
  background:transparent;
  border-color:rgba(255,255,255,0.3);
  color:var(--text-hi);
}
.btn-outline:hover{
  border-color:var(--primary);
  color:var(--primary);
  transform:translateY(-1px);
}
.btn-outline-light{
  background:transparent;
  border-color:rgba(255,255,255,0.35);
  color:var(--text-hi);
}
.btn-outline-light:hover{
  border-color:var(--secondary);
  color:var(--secondary);
}
.btn:focus-visible,.form-control:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
  box-shadow:0 0 0 4px rgba(255,46,136,0.15);
}
/* ===== 头部导航 ===== */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:1000;
  background:transparent;
  transition:all .25s ease;
}
.site-header.scrolled{
  background:rgba(11,14,17,0.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  box-shadow:0 8px 32px rgba(0,0,0,0.35);
}
.top-brand-bar{
  height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 24px;
  max-width:1200px;
  margin:0 auto;
  transition:all .25s ease;
}
.brand-logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:1.4rem;
  font-weight:800;
  color:var(--text-hi);
  letter-spacing:1px;
}
.brand-logo .logo-dot{
  width:12px;
  height:12px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 16px var(--primary);
  display:inline-block;
}
.brand-logo span{
  background:linear-gradient(135deg,var(--primary),var(--accent-violet));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
}
.top-brand-right{
  display:flex;
  align-items:center;
  gap:18px;
  font-size:.9rem;
  color:var(--text-mid);
}
.top-brand-right .phone{
  display:flex;
  align-items:center;
  gap:6px;
}
.top-brand-right .phone i{
  color:var(--secondary);
}
.top-brand-right .btn-sm{
  padding:.4rem 1.2rem;
  font-size:.85rem;
}
.channel-nav-bar{
  height:48px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  padding:0 24px;
  max-width:1200px;
  margin:0 auto;
  transition:all .25s ease;
}
.channel-nav-bar .nav-link{
  color:var(--text-mid);
  font-size:.9rem;
  padding:.4rem .85rem;
  border-radius:6px;
  transition:all .2s ease;
  font-weight:500;
}
.channel-nav-bar .nav-link:hover{
  color:var(--primary);
  background:rgba(255,46,136,0.08);
}
.channel-nav-bar .nav-link.active{
  color:var(--primary);
  background:rgba(255,46,136,0.12);
  font-weight:600;
}
.channel-nav-bar .nav-link.cta-link{
  color:var(--secondary);
  border:1px solid rgba(34,229,196,0.3);
  padding:.25rem 1rem;
  border-radius:20px;
}
.channel-nav-bar .nav-link.cta-link:hover{
  background:rgba(34,229,196,0.1);
  color:var(--secondary);
}
.site-header.scrolled .top-brand-bar{
  display:none;
}
.site-header.scrolled .channel-nav-bar{
  height:60px;
  justify-content:center;
  padding:0 24px;
  max-width:1200px;
  margin:0 auto;
}
.site-header.scrolled .channel-nav-bar .nav-link{
  font-size:.95rem;
  padding:.5rem 1rem;
}
.site-header.scrolled .channel-nav-bar .brand-mini{
  display:inline-flex !important;
  align-items:center;
  gap:6px;
  margin-right:18px;
  font-weight:700;
  color:var(--text-hi);
  font-size:1rem;
}
.brand-mini{
  display:none;
}
.site-header .mobile-toggle{
  display:none;
}
/* ===== Hero ===== */
.hero-section{
  position:relative;
  min-height:560px;
  height:76vh;
  background-image:url('/assets/images/backpic/back-1.jpg');
  background-size:cover;
  background-position:center;
  display:flex;
  align-items:center;
  padding-top:140px;
  padding-bottom:40px;
}
.hero-section::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(11,14,17,0.94) 0%,rgba(11,14,17,0.78) 55%,rgba(11,14,17,0.35) 100%);
}
.hero-section .container{
  position:relative;
  z-index:2;
}
.hero-content{
  display:flex;
  align-items:center;
  gap:50px;
}
.hero-left{
  flex:1.15;
}
.hero-right{
  flex:1;
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(255,46,136,0.12);
  border:1px solid rgba(255,46,136,0.25);
  border-radius:30px;
  padding:.35rem 1rem;
  font-size:.8rem;
  color:var(--primary);
  margin-bottom:24px;
  font-weight:500;
}
.hero-eyebrow i{
  font-size:.7rem;
}
.hero-title{
  font-size:clamp(2.25rem,4.5vw,3.75rem);
  font-weight:800;
  line-height:1.15;
  margin-bottom:20px;
  letter-spacing:1px;
}
.hero-title .txt-primary{
  color:var(--primary);
}
.hero-title .txt-secondary{
  color:var(--secondary);
}
.hero-sub{
  font-size:1.05rem;
  color:var(--text-mid);
  max-width:560px;
  margin-bottom:32px;
  line-height:1.8;
}
.hero-ctas{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  margin-bottom:28px;
}
.hero-data-points{
  display:flex;
  gap:30px;
  flex-wrap:wrap;
}
.hero-data-points .dp-item{
  display:flex;
  flex-direction:column;
}
.hero-data-points .dp-num{
  font-family:var(--font-num);
  font-size:1.6rem;
  font-weight:700;
  color:var(--text-hi);
}
.hero-data-points .dp-num em{
  font-style:normal;
  color:var(--secondary);
  font-size:1rem;
  margin-left:2px;
}
.hero-data-points .dp-label{
  font-size:.8rem;
  color:var(--text-low);
}
/* 白皮书卡片 */
.whitepaper-card{
  background:rgba(21,27,33,0.92);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:24px;
  box-shadow:var(--shadow-card);
  position:relative;
}
.whitepaper-card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:3px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  border-radius:16px 16px 0 0;
}
.wp-cover{
  border-radius:10px;
  overflow:hidden;
  margin-bottom:18px;
  position:relative;
  height:150px;
}
.wp-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.wp-cover .wp-badge{
  position:absolute;
  top:12px;
  left:12px;
  background:var(--primary);
  color:#fff;
  font-size:.7rem;
  padding:.2rem .7rem;
  border-radius:20px;
  font-weight:600;
}
.wp-title{
  font-size:1.1rem;
  font-weight:700;
  margin-bottom:10px;
}
.wp-toc{
  list-style:none;
  margin:0 0 16px;
  padding:0;
  border-top:1px solid var(--hr);
}
.wp-toc li{
  padding:7px 0;
  border-bottom:1px solid var(--hr);
  font-size:.85rem;
  color:var(--text-mid);
  display:flex;
  align-items:center;
  gap:8px;
}
.wp-toc li::before{
  content:"";
  width:6px;
  height:6px;
  background:var(--secondary);
  border-radius:2px;
  flex-shrink:0;
}
.wp-toc li span{
  color:var(--text-low);
  font-family:var(--font-num);
}
.wp-download{
  background:var(--bg-elev);
  border:1px solid var(--line);
  border-radius:10px;
  padding:14px;
  display:flex;
  gap:10px;
}
.wp-download input{
  flex:1;
  background:var(--bg-deep);
  border:1px solid var(--line);
  border-radius:6px;
  color:var(--text-hi);
  padding:.45rem .8rem;
  font-size:.85rem;
}
.wp-download input:focus{
  border-color:var(--primary);
  outline:none;
}
.wp-download button{
  background:var(--primary);
  border:none;
  color:#fff;
  border-radius:6px;
  padding:.45rem 1rem;
  font-size:.85rem;
  font-weight:600;
  cursor:pointer;
  transition:background .2s;
}
.wp-download button:hover{
  background:#ff4fa0;
}
/* mini指标浮层 */
.hero-mini-floats{
  display:flex;
  gap:12px;
  margin-top:18px;
}
.mini-float{
  flex:1;
  background:rgba(15,20,26,0.9);
  border:1px solid rgba(255,46,136,0.2);
  border-radius:10px;
  padding:12px 14px;
  text-align:center;
}
.mini-float .mf-num{
  font-family:var(--font-num);
  font-size:1.3rem;
  font-weight:700;
  color:var(--secondary);
}
.mini-float .mf-label{
  font-size:.7rem;
  color:var(--text-low);
  margin-top:2px;
}
/* ===== 通用section ===== */
.section{
  padding:88px 0;
  position:relative;
}
.section-panel{
  background:var(--bg-panel);
  border-top:1px solid var(--hr);
  border-bottom:1px solid var(--hr);
}
.section-head{
  margin-bottom:52px;
}
.section-head .sec-label{
  display:inline-block;
  font-size:.8rem;
  font-weight:600;
  color:var(--secondary);
  text-transform:uppercase;
  letter-spacing:2px;
  margin-bottom:10px;
}
.section-head h2{
  font-size:clamp(1.75rem,3vw,2.5rem);
  font-weight:700;
  line-height:1.2;
  margin-bottom:14px;
  letter-spacing:.5px;
}
.section-head p{
  color:var(--text-mid);
  max-width:660px;
  font-size:1rem;
}
/* ===== 指标看板 ===== */
.metrics-grid .metric-card{
  background:var(--bg-card);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:28px 24px;
  position:relative;
  transition:transform .25s ease,border-color .25s ease;
  box-shadow:var(--shadow-card);
}
.metrics-grid .metric-card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:var(--primary);
  border-radius:12px 12px 0 0;
}
.metrics-grid .metric-card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,46,136,0.4);
}
.metric-num{
  font-family:var(--font-num);
  font-size:2.6rem;
  font-weight:700;
  line-height:1;
  color:var(--text-hi);
  letter-spacing:1px;
}
.metric-num em{
  font-style:normal;
  font-size:1.1rem;
  color:var(--primary);
  margin-left:4px;
}
.metric-label{
  font-size:.95rem;
  color:var(--text-mid);
  margin-top:10px;
}
.metric-status{
  display:inline-block;
  margin-top:12px;
  padding:.2rem .8rem;
  border-radius:20px;
  font-size:.75rem;
  background:rgba(34,229,196,0.12);
  color:var(--secondary);
  border:1px solid rgba(34,229,196,0.2);
}
.metric-status.violet{
  background:rgba(123,108,255,0.12);
  color:var(--accent-violet);
  border-color:rgba(123,108,255,0.2);
}
.metric-status.warn{
  background:rgba(255,181,71,0.12);
  color:var(--warn);
  border-color:rgba(255,181,71,0.2);
}
/* ===== 服务矩阵 ===== */
.service-big-card{
  background:var(--bg-card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  height:100%;
  transition:transform .25s ease,border-color .25s ease;
  box-shadow:var(--shadow-card);
  display:flex;
  flex-direction:column;
}
.service-big-card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,46,136,0.4);
}
.service-big-card .svc-img{
  height:190px;
  overflow:hidden;
  position:relative;
}
.service-big-card .svc-img img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.service-big-card:hover .svc-img img{
  transform:scale(1.04);
}
.service-big-card .svc-img .svc-badge{
  position:absolute;
  top:14px;
  left:14px;
  background:rgba(11,14,17,0.82);
  color:var(--secondary);
  font-size:.75rem;
  padding:.3rem .9rem;
  border-radius:20px;
  border:1px solid rgba(34,229,196,0.3);
}
.service-big-card .svc-body{
  padding:26px;
  flex:1;
  display:flex;
  flex-direction:column;
}
.service-big-card h3{
  font-size:1.3rem;
  font-weight:700;
  margin-bottom:10px;
}
.service-big-card p{
  color:var(--text-mid);
  font-size:.95rem;
  margin-bottom:16px;
  flex:1;
}
.svc-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:16px;
}
.svc-tags .tag{
  background:rgba(255,46,136,0.1);
  color:var(--primary);
  border:1px solid rgba(255,46,136,0.15);
  padding:.2rem .75rem;
  border-radius:20px;
  font-size:.75rem;
}
.svc-link{
  color:var(--secondary);
  font-size:.9rem;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.svc-link:hover{
  color:var(--text-hi);
}
.service-small-card{
  background:var(--bg-card);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:24px;
  flex:1;
  transition:transform .25s ease,border-color .25s ease;
  box-shadow:var(--shadow-card);
  display:flex;
  flex-direction:column;
}
.service-small-card + .service-small-card{
  margin-top:20px;
}
.service-small-card:hover{
  transform:translateY(-4px);
  border-color:rgba(123,108,255,0.4);
}
.service-small-card .svc-icon{
  width:44px;
  height:44px;
  border-radius:10px;
  background:rgba(123,108,255,0.12);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.3rem;
  color:var(--accent-violet);
  margin-bottom:14px;
}
.service-small-card h4{
  font-size:1.05rem;
  font-weight:600;
  margin-bottom:8px;
}
.service-small-card p{
  color:var(--text-mid);
  font-size:.87rem;
  flex:1;
  margin-bottom:12px;
}
.service-small-card .svc-link{
  font-size:.82rem;
}
.service-cta-strip{
  background:linear-gradient(90deg,rgba(255,46,136,0.18),rgba(123,108,255,0.12),rgba(34,229,196,0.08));
  border:1px solid rgba(255,46,136,0.2);
  border-radius:var(--radius-md);
  padding:28px 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  margin-top:20px;
}
.service-cta-strip h4{
  font-size:1.15rem;
  font-weight:700;
}
.service-cta-strip p{
  color:var(--text-mid);
  font-size:.88rem;
  margin:0;
}
/* ===== 结果对比 ===== */
.compare-panel-wrapper{
  display:flex;
  gap:24px;
  flex-wrap:wrap;
}
.compare-panel{
  flex:1;
  min-width:280px;
  background:var(--bg-card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:30px;
  box-shadow:var(--shadow-card);
}
.compare-panel.right{
  border-color:rgba(255,46,136,0.4);
  box-shadow:var(--shadow-glow);
  background:linear-gradient(135deg,rgba(255,46,136,0.04),rgba(21,27,33,0.9));
}
.compare-panel h3{
  font-size:1.2rem;
  font-weight:700;
  margin-bottom:20px;
  display:flex;
  align-items:center;
  gap:8px;
}
.compare-panel h3 .icon-dot{
  width:10px;
  height:10px;
  border-radius:50%;
  display:inline-block;
}
.compare-panel h3 .icon-dot.negative{
  background:var(--text-low);
}
.compare-panel h3 .icon-dot.positive{
  background:var(--secondary);
  box-shadow:0 0 12px var(--secondary);
}
.compare-list{
  list-style:none;
  padding:0;
  margin:0;
}
.compare-list li{
  padding:10px 0;
  border-bottom:1px solid var(--hr);
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:.92rem;
  color:var(--text-mid);
}
.compare-list li:last-child{
  border-bottom:none;
}
.compare-list li .icon-item{
  width:22px;
  height:22px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:.7rem;
  flex-shrink:0;
  margin-top:2px;
}
.compare-list li .icon-item.x{
  background:rgba(255,255,255,0.08);
  color:var(--text-low);
}
.compare-list li .icon-item.check{
  background:rgba(34,229,196,0.15);
  color:var(--secondary);
}
.compare-conclusion{
  margin-top:24px;
  text-align:center;
  background:var(--bg-panel);
  border:1px solid var(--line);
  border-radius:10px;
  padding:14px 20px;
  font-size:.9rem;
  color:var(--text-mid);
}
.compare-conclusion strong{
  color:var(--secondary);
  font-family:var(--font-num);
}
/* ===== 社会认同 ===== */
.testimonial-card{
  background:var(--bg-card);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:28px;
  height:100%;
  transition:border-color .25s ease;
  box-shadow:var(--shadow-card);
}
.testimonial-card:hover{
  border-color:rgba(34,229,196,0.3);
}
.testimonial-stars{
  color:var(--warn);
  font-size:.9rem;
  margin-bottom:14px;
}
.testimonial-card blockquote{
  font-size:.92rem;
  color:var(--text-mid);
  font-style:normal;
  margin-bottom:18px;
  line-height:1.8;
}
.testimonial-author{
  display:flex;
  align-items:center;
  gap:12px;
}
.testimonial-author .ta-avatar{
  width:40px;
  height:40px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--accent-violet));
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:.9rem;
  color:#fff;
  font-weight:700;
}
.testimonial-author .ta-name{
  font-size:.9rem;
  font-weight:600;
}
.testimonial-author .ta-role{
  font-size:.78rem;
  color:var(--text-low);
}
/* ===== 资讯区 ===== */
.news-list .news-item{
  background:var(--bg-card);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:22px 24px;
  margin-bottom:12px;
  transition:border-color .2s ease,transform .2s ease;
}
.news-item:hover{
  border-color:rgba(255,46,136,0.3);
  transform:translateX(4px);
}
.news-item .news-date{
  font-family:var(--font-num);
  font-size:.75rem;
  color:var(--text-low);
  letter-spacing:1px;
}
.news-item h4{
  font-size:1.05rem;
  font-weight:600;
  margin:6px 0 6px;
}
.news-item h4 a{
  color:var(--text-hi);
}
.news-item h4 a:hover{
  color:var(--primary);
}
.news-item p{
  color:var(--text-mid);
  font-size:.85rem;
  margin:0;
}
.sidebar-card{
  background:var(--bg-card);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:24px;
  margin-bottom:16px;
  box-shadow:var(--shadow-card);
}
.sidebar-card h4{
  font-size:1rem;
  font-weight:700;
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--hr);
}
.sidebar-card .side-white-paper{
  display:flex;
  gap:12px;
  align-items:center;
}
.sidebar-card .side-white-paper .sp-cover{
  width:70px;
  height:70px;
  border-radius:8px;
  overflow:hidden;
  flex-shrink:0;
}
.sidebar-card .side-white-paper .sp-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.sidebar-card .side-white-paper .sp-info{
  flex:1;
}
.sidebar-card .side-white-paper .sp-info .sp-title{
  font-size:.88rem;
  font-weight:600;
  line-height:1.4;
  margin-bottom:6px;
}
.sidebar-card .side-white-paper .sp-info a{
  font-size:.8rem;
  color:var(--secondary);
  font-weight:600;
}
.side-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.side-tags .st-tag{
  background:rgba(255,46,136,0.1);
  color:var(--primary);
  border:1px solid rgba(255,46,136,0.15);
  border-radius:20px;
  padding:.3rem .9rem;
  font-size:.78rem;
  transition:background .2s;
}
.side-tags .st-tag:hover{
  background:rgba(255,46,136,0.2);
  color:var(--text-hi);
}
/* ===== 安全体系 ===== */
.safety-card{
  background:var(--bg-card);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:26px 22px;
  height:100%;
  text-align:center;
  transition:border-color .2s ease;
}
.safety-card:hover{
  border-color:rgba(34,229,196,0.35);
}
.safety-card .safe-icon{
  width:52px;
  height:52px;
  border-radius:50%;
  margin:0 auto 16px;
  background:rgba(34,229,196,0.1);
  border:1px solid rgba(34,229,196,0.15);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.4rem;
  color:var(--secondary);
}
.safety-card h4{
  font-size:1rem;
  font-weight:600;
  margin-bottom:10px;
}
.safety-card p{
  color:var(--text-mid);
  font-size:.84rem;
  margin:0;
}
/* ===== FAQ ===== */
.faq-wrap{
  display:flex;
  gap:48px;
}
.faq-left{
  width:40%;
  flex-shrink:0;
}
.faq-right{
  flex:1;
}
.accordion-item{
  background:var(--bg-card);
  border:1px solid var(--line) !important;
  border-radius:var(--radius-md) !important;
  margin-bottom:14px;
  overflow:hidden;
}
.accordion-button{
  background:transparent;
  color:var(--text-hi);
  font-weight:600;
  padding:1.1rem 1.4rem;
  font-size:.97rem;
  box-shadow:none;
  border-radius:var(--radius-md) !important;
  position:relative;
  transition:background .2s ease;
}
.accordion-button:hover{
  background:rgba(255,46,136,0.04);
}
.accordion-button:not(.collapsed){
  background:rgba(255,46,136,0.06);
  color:var(--text-hi);
  box-shadow:inset 2px 0 0 var(--primary);
}
.accordion-button::after{
  background-image:none;
  content:"+";
  font-size:1.4rem;
  font-weight:400;
  color:var(--primary);
  display:flex;
  align-items:center;
  justify-content:center;
  width:24px;
  height:24px;
  transition:transform .25s ease;
}
.accordion-button:not(.collapsed)::after{
  content:"−";
  transform:rotate(0deg);
}
.accordion-body{
  color:var(--text-mid);
  padding:1rem 1.4rem 1.4rem;
  font-size:.92rem;
  line-height:1.85;
  border-top:1px solid var(--hr);
}
/* ===== 转化表单 ===== */
.contact-wrap{
  display:flex;
  gap:50px;
  align-items:flex-start;
}
.contact-left{
  flex:1;
}
.contact-left .contact-info{
  list-style:none;
  margin:24px 0;
  padding:0;
}
.contact-left .contact-info li{
  display:flex;
  align-items:flex-start;
  gap:12px;
  padding:10px 0;
  color:var(--text-mid);
  font-size:.95rem;
}
.contact-left .contact-info li i{
  color:var(--secondary);
  margin-top:4px;
  width:18px;
  text-align:center;
}
.contact-response{
  background:var(--bg-card);
  border:1px solid rgba(34,229,196,0.2);
  border-radius:10px;
  padding:14px 18px;
  font-size:.88rem;
  color:var(--text-mid);
  display:flex;
  gap:10px;
  align-items:center;
}
.contact-response i{
  color:var(--secondary);
}
.contact-form-card{
  flex:1.1;
  background:var(--bg-card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:36px;
  box-shadow:var(--shadow-card);
}
.contact-form-card .form-label{
  color:var(--text-mid);
  font-size:.9rem;
  margin-bottom:6px;
  font-weight:500;
}
.contact-form-card .form-control{
  background:var(--bg-deep);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  color:var(--text-hi);
  padding:.75rem 1rem;
  font-size:.9rem;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.contact-form-card .form-control:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(255,46,136,0.1);
  background:var(--bg-deep);
  color:var(--text-hi);
}
.contact-form-card .form-control::placeholder{
  color:var(--text-low);
}
.contact-form-card select.form-control{
  appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23A7B2BE' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 1rem center;
}
.contact-form-card .btn-submit{
  width:100%;
  background:var(--primary);
  border:none;
  color:#fff;
  font-weight:600;
  font-size:.95rem;
  padding:.8rem 2rem;
  border-radius:var(--radius-sm);
  cursor:pointer;
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
  margin-top:8px;
}
.contact-form-card .btn-submit:hover{
  background:#ff4fa0;
  transform:translateY(-1px);
  box-shadow:0 8px 24px rgba(255,46,136,0.35);
}
/* ===== 页脚 ===== */
.site-footer{
  background:var(--bg-panel);
  border-top:1px solid var(--line);
  padding-top:64px;
}
.footer-top{
  padding-bottom:40px;
  border-bottom:1px solid var(--hr);
}
.footer-brand p{
  font-size:.9rem;
  color:var(--text-mid);
  margin-top:14px;
}
.footer-brand .brand-logo{
  font-size:1.3rem;
}
.footer-col h5{
  font-size:.95rem;
  font-weight:600;
  margin-bottom:18px;
  color:var(--text-hi);
  position:relative;
  padding-bottom:10px;
}
.footer-col h5::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:24px;
  height:2px;
  background:var(--primary);
  border-radius:2px;
}
.footer-col ul{
  list-style:none;
  padding:0;
  margin:0;
}
.footer-col ul li{
  margin-bottom:10px;
}
.footer-col ul li a{
  color:var(--text-mid);
  font-size:.88rem;
  transition:color .2s ease,transform .2s ease;
  display:inline-block;
}
.footer-col ul li a:hover{
  color:var(--primary);
  transform:translateX(4px);
}
.footer-col.contact-col ul li{
  display:flex;
  align-items:flex-start;
  gap:8px;
  color:var(--text-mid);
  font-size:.88rem;
}
.footer-col.contact-col ul li i{
  color:var(--secondary);
  margin-top:4px;
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:24px 0;
  flex-wrap:wrap;
  gap:10px;
}
.footer-bottom p{
  margin:0;
  font-size:.82rem;
  color:var(--text-low);
}
.footer-bottom .footer-copy a{
  color:var(--text-low);
}
.footer-bottom .footer-copy a:hover{
  color:var(--secondary);
}
/* ===== 响应式 ===== */
@media (max-width:991px){
  .top-brand-bar{
    display:flex;
    height:56px;
    padding:0 16px;
  }
  .top-brand-right .phone-text,.top-brand-right .btn-sm{
    display:none;
  }
  .channel-nav-bar{
    display:none;
  }
  .site-header .mobile-toggle{
    display:flex;
    align-items:center;
    justify-content:center;
    width:44px;
    height:44px;
    background:transparent;
    border:1px solid var(--line);
    border-radius:8px;
    color:var(--text-hi);
    cursor:pointer;
    font-size:1.2rem;
  }
  .mobile-menu{
    background:rgba(11,14,17,0.97);
    backdrop-filter:blur(12px);
    border-top:1px solid var(--line);
    display:none;
    flex-direction:column;
    padding:16px;
    max-height:calc(100vh - 56px);
    overflow-y:auto;
  }
  .mobile-menu.open{
    display:flex;
  }
  .mobile-menu a{
    padding:14px 12px;
    border-bottom:1px solid var(--hr);
    color:var(--text-hi);
    font-size:.95rem;
    font-weight:500;
    min-height:44px;
    display:flex;
    align-items:center;
  }
  .mobile-menu a:last-child{
    border-bottom:none;
  }
  .mobile-menu a:hover,.mobile-menu a.active{
    color:var(--primary);
    background:rgba(255,46,136,0.06);
  }
  .hero-section{
    height:auto;
    min-height:600px;
    padding-top:110px;
  }
  .hero-content{
    flex-direction:column;
    gap:36px;
  }
  .hero-left,.hero-right{
    flex:1 1 100%;
  }
  .faq-wrap{
    flex-direction:column;
    gap:32px;
  }
  .faq-left{
    width:100%;
  }
  .contact-wrap{
    flex-direction:column;
    gap:30px;
  }
  .section{
    padding:64px 0;
  }
  .metrics-grid .col-md-6{
    margin-bottom:20px;
  }
}
@media (max-width:767px){
  .container{
    padding-left:16px;
    padding-right:16px;
  }
  .section{
    padding:48px 0;
  }
  .brand-logo{
    font-size:1.15rem;
  }
  .hero-title{
    font-size:clamp(1.75rem,6vw,2.4rem);
  }
  .hero-sub{
    font-size:.95rem;
  }
  .hero-ctas{
    flex-direction:column;
    align-items:stretch;
  }
  .hero-ctas .btn{
    width:100%;
  }
  .metric-num{
    font-size:2rem;
  }
  .compare-panel-wrapper{
    flex-direction:column;
  }
  .service-cta-strip{
    flex-direction:column;
    text-align:center;
  }
  .footer-top .col-12{
    margin-bottom:32px;
  }
  .footer-bottom{
    flex-direction:column;
    text-align:center;
  }
  .contact-form-card{
    padding:24px;
  }
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
    :root {
        --bg-deep: #0B0E11;
        --bg-panel: #10151A;
        --bg-card: #151B21;
        --bg-elev: #1A222A;
        --line: rgba(255,255,255,0.08);
        --text-hi: #F0F4F8;
        --text-mid: #A7B2BE;
        --text-low: #6B7A88;
        --primary: #FF2E88;
        --secondary: #22E5C4;
        --accent-violet: #7B6CFF;
        --warn: #FFB547;
        --hr: rgba(255,255,255,0.06);
        --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
        --shadow-glow: 0 0 24px rgba(255,46,136,0.25);
        --radius-lg: 16px;
        --radius-md: 12px;
        --radius-sm: 8px;
        --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        --font-num: Inter, "Bahnschrift", "DIN Alternate", sans-serif;
    }
    /* ============ Reset ============ */
    * { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
        font-family: var(--font-sans);
        background: var(--bg-deep);
        color: var(--text-hi);
        line-height: 1.75;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
    }
    body::before {
        content: "";
        position: fixed;
        inset: 0;
        background-image: radial-gradient(circle at 15% 20%, rgba(255,46,136,0.03), transparent 40%), radial-gradient(circle at 85% 70%, rgba(34,229,196,0.03), transparent 40%);
        pointer-events: none;
        z-index: 0;
    }
    a { color: var(--text-hi); text-decoration: none; transition: color .2s ease; }
    a:hover { color: var(--primary); }
    img { max-width: 100%; height: auto; object-fit: cover; }
    ul { list-style: none; }
    .container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }

    /* ============ 按钮 ============ */
    .btn {
        border-radius: var(--radius-sm);
        font-weight: 600;
        padding: .65rem 1.6rem;
        transition: all .25s ease;
        border: 1px solid transparent;
        line-height: 1.5;
    }
    .btn-primary {
        background: var(--primary);
        border-color: var(--primary);
        color: #fff;
        box-shadow: 0 4px 18px rgba(255,46,136,0.3);
    }
    .btn-primary:hover {
        background: #ff4fa0;
        border-color: #ff4fa0;
        color: #fff;
        transform: translateY(-1px);
        box-shadow: 0 8px 28px rgba(255,46,136,0.4);
    }
    .btn-outline {
        background: transparent;
        border-color: rgba(255,255,255,0.3);
        color: var(--text-hi);
    }
    .btn-outline:hover {
        border-color: var(--primary);
        color: var(--primary);
        transform: translateY(-1px);
    }
    .btn-outline-light {
        background: transparent;
        border-color: rgba(255,255,255,0.35);
        color: var(--text-hi);
    }
    .btn-outline-light:hover {
        border-color: var(--secondary);
        color: var(--secondary);
        transform: translateY(-1px);
    }
    .btn-sm { padding: .4rem 1.2rem; font-size: .85rem; }
    .btn:focus-visible,
    .form-control:focus-visible,
    input:focus-visible,
    textarea:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
        box-shadow: 0 0 0 4px rgba(255,46,136,0.15);
    }

    /* ============ Header & 导航 ============ */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: transparent;
        transition: all .25s ease;
    }
    .site-header.scrolled {
        background: rgba(11,14,17,0.88);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        box-shadow: 0 8px 32px rgba(0,0,0,0.35);
    }
    .top-brand-bar {
        height: 64px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 24px;
        max-width: 1200px;
        margin: 0 auto;
        transition: all .25s ease;
    }
    .brand-logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 1.4rem;
        font-weight: 800;
        color: var(--text-hi);
        letter-spacing: 1px;
    }
    .brand-logo .logo-dot {
        width: 12px;
        height: 12px;
        border-radius: 50%;
        background: var(--primary);
        box-shadow: 0 0 16px var(--primary);
        display: inline-block;
    }
    .brand-logo span {
        background: linear-gradient(135deg, var(--primary), var(--accent-violet));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    .brand-logo span.logo-dot {
        background: var(--primary);
        -webkit-text-fill-color: initial;
    }
    .top-brand-right {
        display: flex;
        align-items: center;
        gap: 18px;
        font-size: .9rem;
        color: var(--text-mid);
    }
    .top-brand-right .phone {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .top-brand-right .phone i { color: var(--secondary); font-style: normal; }
    .channel-nav-bar {
        height: 48px;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        padding: 0 24px;
        max-width: 1200px;
        margin: 0 auto;
        transition: all .25s ease;
    }
    .channel-nav-bar .nav-link {
        color: var(--text-mid);
        font-size: .9rem;
        padding: .4rem .85rem;
        border-radius: 6px;
        transition: all .2s ease;
        font-weight: 500;
    }
    .channel-nav-bar .nav-link:hover {
        color: var(--primary);
        background: rgba(255,46,136,0.08);
    }
    .channel-nav-bar .nav-link.active {
        color: var(--primary);
        background: rgba(255,46,136,0.12);
        font-weight: 600;
    }
    .channel-nav-bar .nav-link.cta-link {
        color: var(--secondary);
        border: 1px solid rgba(34,229,196,0.3);
        padding: .25rem 1rem;
        border-radius: 20px;
    }
    .channel-nav-bar .nav-link.cta-link:hover {
        background: rgba(34,229,196,0.1);
        color: var(--secondary);
    }
    .site-header.scrolled .top-brand-bar { display: none; }
    .site-header.scrolled .channel-nav-bar {
        height: 60px;
        justify-content: center;
    }
    .site-header.scrolled .channel-nav-bar .nav-link {
        font-size: .95rem;
        padding: .5rem 1rem;
    }
    .site-header.scrolled .channel-nav-bar .brand-mini {
        display: inline-flex !important;
        align-items: center;
        gap: 6px;
        margin-right: 18px;
        font-weight: 700;
        color: var(--text-hi);
        font-size: 1rem;
    }
    .brand-mini { display: none; }
    .site-header .mobile-toggle { display: none; }
    .header-mobile-bar { display: none; }
    .mobile-menu { display: none; }

    /* ============ 次级 Hero ============ */
    .category-hero {
        position: relative;
        min-height: 360px;
        max-height: 420px;
        background-image: url('/assets/images/backpic/back-4.jpg');
        background-size: cover;
        background-position: center;
        display: flex;
        align-items: center;
        padding: 140px 0 60px;
        margin-top: 0;
    }
    .category-hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(90deg, rgba(11,14,17,0.92) 0%, rgba(11,14,17,0.75) 60%, rgba(11,14,17,0.4) 100%);
    }
    .category-hero .container {
        position: relative;
        z-index: 2;
    }
    .breadcrumb-bar {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: .85rem;
        color: var(--text-low);
        margin-bottom: 20px;
    }
    .breadcrumb-bar a { color: var(--text-mid); }
    .breadcrumb-bar a:hover { color: var(--primary); }
    .breadcrumb-bar .sep { color: var(--text-low); }
    .breadcrumb-bar .current { color: var(--primary); }
    .category-hero h1 {
        font-size: clamp(2rem, 3.8vw, 3rem);
        font-weight: 800;
        line-height: 1.2;
        margin-bottom: 16px;
        letter-spacing: 1px;
    }
    .category-hero h1 .txt-primary { color: var(--primary); }
    .category-hero .hero-desc {
        font-size: 1rem;
        color: var(--text-mid);
        max-width: 640px;
    }

    /* ============ 分类标签区 ============ */
    .section { padding: 88px 0; }
    .category-tags {
        background: var(--bg-deep);
        border-bottom: 1px solid var(--hr);
        padding: 28px 0;
    }
    .tags-wrap {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
    }
    .tag-pill {
        display: inline-flex;
        align-items: center;
        padding: .45rem 1.2rem;
        border-radius: 30px;
        font-size: .85rem;
        font-weight: 500;
        color: var(--text-mid);
        background: var(--bg-card);
        border: 1px solid var(--line);
        transition: all .2s ease;
        cursor: pointer;
    }
    .tag-pill:hover {
        border-color: var(--primary);
        color: var(--primary);
        background: rgba(255,46,136,0.08);
    }
    .tag-pill.active {
        background: rgba(255,46,136,0.12);
        border-color: var(--primary);
        color: var(--primary);
        font-weight: 600;
    }

    /* ============ 内容列表 ============ */
    .trend-content { background: var(--bg-panel); border-top: 1px solid var(--hr); border-bottom: 1px solid var(--hr); }
    .section-head {
        margin-bottom: 48px;
    }
    .section-head .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: .8rem;
        color: var(--primary);
        background: rgba(255,46,136,0.1);
        border: 1px solid rgba(255,46,136,0.2);
        padding: .25rem 1rem;
        border-radius: 30px;
        margin-bottom: 14px;
    }
    .section-head h2 {
        font-size: clamp(1.75rem, 3vw, 2.5rem);
        font-weight: 700;
        line-height: 1.2;
        margin-bottom: 12px;
    }
    .section-head p {
        color: var(--text-mid);
        max-width: 600px;
    }
    .trend-card {
        background: var(--bg-card);
        border: 1px solid var(--line);
        border-radius: var(--radius-lg);
        overflow: hidden;
        height: 100%;
        transition: all .3s ease;
        display: flex;
        flex-direction: column;
    }
    .trend-card:hover {
        transform: translateY(-4px);
        border-color: var(--primary);
        box-shadow: var(--shadow-card);
    }
    .trend-card .card-img {
        display: block;
        width: 100%;
        height: 100%;
        min-height: 220px;
        object-fit: cover;
    }
    .trend-card .card-body {
        padding: 28px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .trend-card .card-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-bottom: 14px;
    }
    .trend-card .card-tags .tag {
        font-size: .75rem;
        color: var(--secondary);
        background: rgba(34,229,196,0.08);
        border: 1px solid rgba(34,229,196,0.2);
        padding: .15rem .7rem;
        border-radius: 20px;
    }
    .trend-card h3 {
        font-size: 1.2rem;
        font-weight: 600;
        line-height: 1.4;
        margin-bottom: 10px;
    }
    .trend-card p {
        color: var(--text-mid);
        font-size: .9rem;
        flex: 1;
        margin-bottom: 18px;
    }
    .trend-card .card-link {
        font-size: .85rem;
        color: var(--primary);
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: gap .2s ease;
    }
    .trend-card .card-link:hover { gap: 12px; }
    .wide-card .row { height: 100%; }
    .wide-card .card-img-col {
        min-height: 260px;
        overflow: hidden;
    }
    .wide-card .card-img-col img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .trend-card.vertical-card .card-img {
        height: 200px;
        width: 100%;
    }
    .trend-card.compact-card .card-img-col {
        min-height: 180px;
    }

    /* ============ 局部对比 / 数据小条 ============ */
    .trend-compare {
        background: var(--bg-deep);
        padding: 80px 0;
        border-bottom: 1px solid var(--hr);
    }
    .compare-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    .compare-panel {
        background: var(--bg-card);
        border: 1px solid var(--line);
        border-radius: var(--radius-lg);
        padding: 32px;
    }
    .compare-panel.before-panel { border-left: 4px solid var(--text-low); }
    .compare-panel.after-panel {
        border-left: 4px solid var(--primary);
        box-shadow: var(--shadow-glow);
    }
    .compare-panel h4 {
        font-size: 1.1rem;
        font-weight: 700;
        margin-bottom: 20px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .compare-panel.after-panel h4 { color: var(--primary); }
    .compare-list li {
        display: flex;
        align-items: flex-start;
        gap: 10px;
        padding: 8px 0;
        color: var(--text-mid);
        font-size: .9rem;
        line-height: 1.6;
    }
    .compare-list li .mark {
        flex-shrink: 0;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: .7rem;
        font-weight: 700;
        margin-top: 2px;
    }
    .compare-list li .mark.no {
        background: rgba(255,71,87,0.12);
        color: #ff4757;
        border: 1px solid rgba(255,71,87,0.3);
    }
    .compare-list li .mark.yes {
        background: rgba(34,229,196,0.12);
        color: var(--secondary);
        border: 1px solid rgba(34,229,196,0.3);
    }
    .metric-strip {
        margin-top: 48px;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 16px;
    }
    .metric-mini {
        background: var(--bg-card);
        border: 1px solid var(--line);
        border-top: 2px solid var(--primary);
        border-radius: var(--radius-md);
        padding: 20px 18px;
        text-align: center;
        transition: all .3s ease;
    }
    .metric-mini:hover {
        transform: translateY(-3px);
        border-top-color: var(--secondary);
        box-shadow: var(--shadow-card);
    }
    .metric-mini .num {
        font-family: var(--font-num);
        font-size: 1.9rem;
        font-weight: 800;
        color: var(--text-hi);
        line-height: 1.2;
    }
    .metric-mini .num em {
        font-style: normal;
        color: var(--primary);
        font-size: 1rem;
        margin-left: 2px;
    }
    .metric-mini .label {
        font-size: .8rem;
        color: var(--text-mid);
        margin-top: 4px;
    }

    /* ============ FAQ ============ */
    .category-faq { background: var(--bg-panel); border-bottom: 1px solid var(--hr); }
    .faq-layout {
        display: grid;
        grid-template-columns: 1fr 1.5fr;
        gap: 48px;
    }
    .faq-heading h2 {
        font-size: clamp(1.75rem, 3vw, 2.2rem);
        font-weight: 700;
        margin-bottom: 14px;
    }
    .faq-heading p { color: var(--text-mid); }
    .accordion { --bs-accordion-bg: transparent; --bs-accordion-border-color: var(--line); --bs-accordion-btn-color: var(--text-hi); --bs-accordion-body-color: var(--text-mid); --bs-accordion-active-bg: transparent; --bs-accordion-active-color: var(--primary); --bs-accordion-btn-focus-box-shadow: none; }
    .accordion-item {
        background: var(--bg-card);
        border: 1px solid var(--line) !important;
        border-radius: var(--radius-md) !important;
        margin-bottom: 12px;
        overflow: hidden;
    }
    .accordion-button {
        font-size: .95rem;
        font-weight: 600;
        padding: 18px 20px;
        background: transparent;
        color: var(--text-hi);
        border-left: 2px solid transparent;
        transition: all .2s ease;
    }
    .accordion-button:not(.collapsed) {
        color: var(--primary);
        background: rgba(255,46,136,0.04);
        border-left-color: var(--primary);
    }
    .accordion-button::after {
        background-image: none;
        content: "+";
        font-size: 1.4rem;
        color: var(--text-mid);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 24px;
        height: 24px;
        transition: transform .25s ease;
        font-weight: 400;
    }
    .accordion-button:not(.collapsed)::after {
        transform: rotate(45deg);
        color: var(--primary);
    }
    .accordion-body {
        padding: 0 20px 18px;
        color: var(--text-mid);
        font-size: .9rem;
        line-height: 1.75;
    }

    /* ============ CTA 表单区 ============ */
    .cta-band {
        position: relative;
        padding: 80px 0;
        background-image: url('/assets/images/backpic/back-2.jpg');
        background-size: cover;
        background-position: center;
        background-attachment: fixed;
    }
    .cta-band::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(90deg, rgba(11,14,17,0.95) 0%, rgba(11,14,17,0.82) 60%, rgba(11,14,17,0.65) 100%);
    }
    .cta-band .container { position: relative; z-index: 2; }
    .cta-band-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 40px;
        flex-wrap: wrap;
    }
    .cta-band-left { flex: 1 1 380px; }
    .cta-band-left h2 {
        font-size: clamp(1.6rem, 2.8vw, 2.2rem);
        font-weight: 700;
        line-height: 1.3;
        margin-bottom: 12px;
    }
    .cta-band-left p {
        color: var(--text-mid);
        margin-bottom: 20px;
        max-width: 520px;
    }
    .cta-band-form {
        flex: 1 1 340px;
        display: flex;
        gap: 10px;
    }
    .cta-band-form .form-control {
        background: var(--bg-card);
        border: 1px solid var(--line);
        border-radius: var(--radius-sm);
        color: var(--text-hi);
        padding: .7rem 1rem;
        font-size: .9rem;
    }
    .cta-band-form .form-control:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(255,46,136,0.12);
        background: var(--bg-card);
        color: var(--text-hi);
    }
    .cta-band-form .form-control::placeholder { color: var(--text-low); }

    /* ============ 页脚 ============ */
    .site-footer {
        background: var(--bg-deep);
        border-top: 1px solid var(--hr);
        padding-top: 56px;
        position: relative;
        z-index: 2;
    }
    .footer-top { padding-bottom: 40px; }
    .footer-brand .brand-logo { font-size: 1.3rem; margin-bottom: 14px; }
    .footer-brand p {
        color: var(--text-mid);
        font-size: .9rem;
        margin-top: 12px;
        max-width: 340px;
    }
    .footer-col h5 {
        font-size: .95rem;
        font-weight: 600;
        color: var(--text-hi);
        margin-bottom: 16px;
    }
    .footer-col ul li { margin-bottom: 8px; }
    .footer-col ul li a { color: var(--text-mid); font-size: .88rem; }
    .footer-col ul li a:hover { color: var(--primary); }
    .footer-col .contact-col ul li { color: var(--text-mid); font-size: .88rem; }
    .footer-col ul li i { font-style: normal; color: var(--secondary); margin-right: 6px; }
    .footer-bottom {
        border-top: 1px solid var(--hr);
        padding: 18px 0;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
        font-size: .8rem;
        color: var(--text-low);
    }
    .footer-bottom a { color: var(--text-low); }
    .footer-bottom a:hover { color: var(--primary); }

    /* ============ 响应式 ============ */
    @media (max-width: 991px) {
        .top-brand-bar { display: none; }
        .channel-nav-bar { display: none; }
        .header-mobile-bar {
            display: flex;
            height: 56px;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .header-mobile-bar .brand-logo { font-size: 1.2rem; }
        .site-header .mobile-toggle {
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            background: transparent;
            border: 1px solid var(--line);
            border-radius: 8px;
            padding: 8px;
            cursor: pointer;
            transition: all .25s ease;
        }
        .site-header .mobile-toggle:hover { border-color: var(--primary); }
        .site-header .mobile-toggle span {
            display: block;
            height: 2px;
            width: 22px;
            background: var(--text-hi);
            border-radius: 2px;
            transition: all .3s ease;
            margin: 0 auto;
        }
        .site-header .mobile-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .site-header .mobile-toggle.active span:nth-child(2) { opacity: 0; }
        .site-header .mobile-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
        .mobile-menu {
            display: none;
            background: rgba(11,14,17,0.96);
            border-top: 1px solid var(--line);
            padding: 12px 24px 20px;
            backdrop-filter: blur(12px);
        }
        .mobile-menu.open { display: block; }
        .mobile-menu a {
            display: block;
            padding: 14px 8px;
            color: var(--text-mid);
            font-size: .95rem;
            border-bottom: 1px solid rgba(255,255,255,0.04);
        }
        .mobile-menu a:last-child { border-bottom: none; }
        .mobile-menu a:hover { color: var(--primary); background: rgba(255,46,136,0.06); }
        .mobile-menu a.active { color: var(--primary); font-weight: 600; }
        .site-header.scrolled .header-mobile-bar {
            background: rgba(11,14,17,0.88);
            backdrop-filter: blur(10px);
        }
        .section { padding: 64px 0; }
        .category-hero { min-height: 320px; padding-top: 120px; }
        .compare-grid { grid-template-columns: 1fr; }
        .metric-strip { grid-template-columns: repeat(2, 1fr); }
        .faq-layout { grid-template-columns: 1fr; gap: 32px; }
        .cta-band-inner { flex-direction: column; align-items: flex-start; }
        .cta-band-form { width: 100%; }
        .cta-band-form .form-control { flex: 1; }
    }
    @media (max-width: 767px) {
        .section { padding: 48px 0; }
        .container { padding-left: 16px; padding-right: 16px; }
        .category-hero { min-height: 280px; padding-top: 100px; }
        .category-hero h1 { font-size: clamp(1.6rem, 6vw, 2.2rem); }
        .metric-strip { grid-template-columns: 1fr 1fr; gap: 12px; }
        .metric-mini .num { font-size: 1.5rem; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .footer-top { padding-bottom: 24px; }
        .trend-card .card-img-col { min-height: 180px !important; }
        .trend-card .card-img { min-height: 180px !important; }
        .cta-band { background-attachment: scroll; padding: 56px 0; }
        .cta-band-form { flex-direction: column; }
    }
    @media (max-width: 480px) {
        .metric-strip { grid-template-columns: 1fr; }
        .compare-panel { padding: 24px; }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}