/* roulang page: index */
:root{
  --bg:#0A0E19;
  --bg-raise:#101A2B;
  --primary:#3D7DEB;
  --primary-deep:#2756a8;
  --accent:#2DE0C5;
  --amber:#FFAE58;
  --danger:#FF7A7A;
  --text:#C4D1E5;
  --text-strong:#E7EEFB;
  --text-muted:#93A5C0;
  --border:rgba(130,170,255,.14);
  --glass:rgba(20,32,50,.55);
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --shadow-card:0 12px 40px rgba(2,6,18,.25);
  --shadow-float:0 18px 56px rgba(2,6,18,.38);
  --font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --space-section:clamp(64px,9vw,112px);
  --transition:.25s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-family);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(640px 360px at 88% 6%,rgba(61,125,235,.12),transparent 70%),
    radial-gradient(720px 400px at -4% 36%,rgba(45,224,197,.055),transparent 70%);
  z-index:0;
}
body *{position:relative;z-index:1}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit;border:0;background:none;cursor:pointer}
ul{list-style:none}
section,footer{scroll-margin-top:80px}
.container{
  width:min(1240px,100%);
  margin-inline:auto;
  padding-inline:clamp(20px,4vw,48px);
}
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  background:transparent;
  transition:background var(--transition),border-color var(--transition),box-shadow var(--transition);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(10,14,25,.88);
  backdrop-filter:blur(16px) saturate(130%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  border-bottom-color:rgba(130,170,255,.1);
  box-shadow:0 8px 28px rgba(2,6,18,.3);
}
.header-inner{
  min-height:64px;
  display:flex;
  align-items:center;
  gap:20px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
  padding-block:8px;
}
.brand-mark{
  width:36px;height:36px;
  border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(45,224,197,.22),rgba(61,125,235,.18));
  border:1px solid rgba(45,224,197,.36);
  box-shadow:0 0 20px rgba(45,224,197,.12);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{
  font-size:19px;
  font-weight:800;
  color:var(--text-strong);
  letter-spacing:.5px;
  line-height:1.2;
  white-space:nowrap;
}
.brand-text b{
  color:var(--accent);
  font-weight:800;
  margin-left:2px;
}
.nav-shell{
  display:flex;
  align-items:center;
  gap:24px;
  flex:1;
  justify-content:space-between;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
}
.nav-link{
  position:relative;
  padding:8px 14px;
  font-size:15px;
  font-weight:500;
  color:#B4C4DB;
  border-radius:999px;
  transition:color var(--transition),background var(--transition);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:0;
  width:0;height:2px;
  border-radius:2px;
  background:var(--accent);
  transform:translateX(-50%);
  transition:width var(--transition);
}
.nav-link:hover{
  color:var(--text-strong);
}
.nav-link.active{
  color:#FFFFFF;
}
.nav-link.active::after{
  width:22px;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:999px;
  font-weight:600;
  transition:transform var(--transition),box-shadow var(--transition),background var(--transition),border-color var(--transition),color var(--transition);
  will-change:transform;
}
.btn:focus-visible,.nav-link:focus-visible,.brand:focus-visible,.text-link:focus-visible,.back-top:focus-visible,.faq-top:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:3px;
}
.btn-primary{
  height:48px;
  padding:0 26px;
  background:linear-gradient(135deg,#2DE0C5,#3D7DEB);
  color:#04121E;
  box-shadow:0 8px 24px rgba(45,224,197,.14);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 12px 32px rgba(45,224,197,.2);
}
.btn-secondary{
  height:46px;
  padding:0 24px;
  background:transparent;
  border:1px solid rgba(130,170,255,.32);
  color:#C9D6EA;
}
.btn-secondary:hover{
  border-color:var(--accent);
  color:#FFFFFF;
  transform:translateY(-2px);
}
.btn-ghost-sm{
  height:38px;
  padding:0 18px;
  border:1px solid transparent;
  color:#AFC0D8;
}
.btn-ghost-sm:hover{
  border-color:rgba(130,170,255,.3);
  color:#FFFFFF;
}
.btn-primary-sm{
  height:38px;
  padding:0 18px;
  background:linear-gradient(135deg,#2DE0C5,#3D7DEB);
  color:#04121E;
}
.btn-primary-sm:hover{
  box-shadow:0 8px 20px rgba(45,224,197,.18);
}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  align-items:center;
  justify-content:center;
  border-radius:12px;
  border:1px solid var(--border);
  background:rgba(20,32,50,.4);
}
.nav-toggle svg{width:22px;height:22px}
.nav-toggle .close-icon{display:none}
.nav-shell.open .nav-toggle .open-icon{display:none}
.nav-shell.open .nav-toggle .close-icon{display:block}

.hero{
  position:relative;
  padding-top:clamp(116px,13vw,168px);
  padding-bottom:clamp(64px,8vw,104px);
  background:
    radial-gradient(900px 480px at 88% 14%,rgba(61,125,235,.15),transparent 68%),
    radial-gradient(680px 400px at 18% 76%,rgba(45,224,197,.05),transparent 65%);
  overflow:hidden;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  align-items:center;
  gap:clamp(30px,5vw,76px);
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.4px;
  color:#9FC7F8;
  padding:6px 14px;
  border:1px solid rgba(61,125,235,.34);
  background:rgba(61,125,235,.1);
  border-radius:999px;
  margin-bottom:26px;
}
.pulse-dot{
  width:7px;height:7px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 0 0 rgba(45,224,197,.5);
  animation:pulse 2.2s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(45,224,197,.42)}
  70%{box-shadow:0 0 0 8px rgba(45,224,197,0)}
  100%{box-shadow:0 0 0 0 rgba(45,224,197,0)}
}
.hero-copy h1{
  font-size:clamp(36px,5vw,60px);
  line-height:1.15;
  font-weight:800;
  color:var(--text-strong);
  letter-spacing:.5px;
}
.hero-copy h1 span{
  color:var(--accent);
}
.hero-lede{
  margin-top:22px;
  max-width:560px;
  font-size:18px;
  line-height:1.85;
  color:#B4C4DB;
}
.hero-actions{
  margin-top:32px;
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}
.hero-points{
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  margin-top:34px;
}
.hero-points li{
  display:flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:#9FB2CD;
}
.hero-points svg{
  width:16px;height:16px;
  color:var(--accent);
}
.hero-visual{
  position:relative;
  min-height:420px;
  display:flex;
  align-items:center;
  justify-content:center;
}
.hero-bg{
  position:absolute;
  inset:-4% -6%;
  border-radius:28px;
  overflow:hidden;
  z-index:0;
}
.hero-bg img{
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.46;
}
.hero-bg::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(160deg,rgba(10,14,25,.25),rgba(10,14,25,.9));
}
.wave-lines{
  position:absolute;
  inset:8% 0 6%;
  width:100%;
  height:86%;
  z-index:1;
  pointer-events:none;
  opacity:.56;
}
.wave-lines path{
  fill:none;
  stroke-width:2;
}
.entry-demo{
  position:relative;
  z-index:2;
  width:min(360px,84%);
  border-radius:22px;
  background:var(--glass);
  backdrop-filter:blur(20px) saturate(120%);
  -webkit-backdrop-filter:blur(20px) saturate(120%);
  border:1px solid rgba(130,170,255,.22);
  padding:26px 22px 22px;
  box-shadow:0 20px 50px rgba(2,6,18,.36);
}
.entry-demo-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:20px;
}
.entry-demo-top span{
  font-size:13px;
  font-weight:600;
  color:#C2D5F2;
  letter-spacing:.3px;
}
.entry-status{
  font-size:12px;
  color:var(--accent);
  display:flex;
  align-items:center;
  gap:5px;
}
.entry-status i{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 8px var(--accent);
}
.demo-field{
  border:1px solid rgba(130,170,255,.18);
  border-radius:12px;
  padding:11px 14px;
  font-size:14px;
  color:#94A8C4;
  background:rgba(2,6,18,.36);
  margin-bottom:12px;
}
.demo-field small{
  display:block;
  color:#5F7B9C;
  font-size:11px;
  margin-bottom:3px;
}
.demo-submit{
  height:44px;
  border-radius:12px;
  margin-top:16px;
  background:linear-gradient(135deg,#2DE0C5,#3D7DEB);
  color:#04121E;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  opacity:.82;
}
.demo-note{
  margin-top:14px;
  font-size:11px;
  color:#7B90AE;
  text-align:center;
}
.section{
  padding-block:var(--space-section);
}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:42px;
}
.section-kicker{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:13px;
  font-weight:600;
  color:var(--accent);
  letter-spacing:.3px;
  margin-bottom:8px;
}
.section-kicker::before{
  content:"";
  width:20px;height:1px;
  background:var(--accent);
}
.section-head h2{
  font-size:clamp(26px,3vw,36px);
  line-height:1.35;
  font-weight:700;
  color:var(--text-strong);
}
.section-head p.note{
  max-width:460px;
  font-size:14px;
  color:var(--text-muted);
  line-height:1.8;
}
.gateway-section{
  background:
    radial-gradient(720px 340px at 90% 20%,rgba(61,125,235,.06),transparent 70%),
    radial-gradient(560px 320px at 10% 90%,rgba(45,224,197,.045),transparent 60%);
}
.bento-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  grid-auto-flow:dense;
  grid-auto-rows:148px;
}
.bento-card{
  border-radius:var(--radius-lg);
  background:rgba(16,26,43,.78);
  border:1px solid var(--border);
  overflow:hidden;
  box-shadow:0 10px 30px rgba(2,6,18,.16);
  transform:translateY(0);
  transition:transform var(--transition),border-color var(--transition),box-shadow var(--transition);
  display:flex;
  flex-direction:column;
  height:100%;
}
.bento-card:hover{
  transform:translateY(-3px);
  border-color:rgba(45,224,197,.38);
  box-shadow:var(--shadow-card);
}
.featured-card{
  grid-column:span 2;
  grid-row:span 2;
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
}
.featured-card .card-copy{
  padding:28px 0 22px 26px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:flex-start;
}
.featured-card .card-media{
  height:100%;
}
.bento-card .card-body{
  padding:22px 22px 16px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.media-card .card-body{
  padding:0;
  display:grid;
  grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
  height:100%;
}
.media-card .card-copy{
  padding:24px 18px 18px 24px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:flex-start;
}
.card-icon{
  width:38px;height:38px;
  border-radius:12px;
  display:grid;
  place-items:center;
  margin-bottom:16px;
  background:rgba(45,224,197,.08);
  border:1px solid rgba(45,224,197,.2);
  color:var(--accent);
}
.card-icon svg{width:20px;height:20px}
.bento-card h3{
  font-size:19px;
  line-height:1.45;
  color:var(--text-strong);
  font-weight:700;
  margin-bottom:8px;
}
.bento-card p{
  font-size:14px;
  line-height:1.75;
  color:var(--text-muted);
  margin-bottom:14px;
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:5px;
  font-size:14px;
  font-weight:600;
  color:var(--accent);
  margin-top:auto;
  transition:gap var(--transition),color var(--transition);
}
.text-link:hover{
  color:#FFFFFF;
}
.text-link span{
  transition:transform var(--transition);
}
.text-link:hover span{
  transform:translateX(3px);
}
.mini-card{
  justify-content:center;
  grid-column:span 1;
}
.mini-card .card-body{
  padding:16px 18px;
}
.mini-card h3{
  font-size:16px;
  margin-bottom:6px;
}
.mini-card p{
  font-size:13px;
  margin-bottom:4px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-media{
  position:relative;
  overflow:hidden;
  min-height:130px;
}
.card-media img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.card-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 30%,rgba(10,14,25,.42));
}
.wide-media-card{
  grid-column:span 2;
  grid-row:span 2;
}
.testimonials-section{
  background:#0C1320;
}
.testimonial-empty{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:22px;
  border:1px dashed rgba(130,170,255,.3);
  border-radius:var(--radius-lg);
  padding:54px 28px;
  text-align:left;
  background:rgba(20,32,50,.32);
  min-height:220px;
}
.empty-icon{
  width:58px;height:58px;
  flex-shrink:0;
  display:grid;
  place-items:center;
  border-radius:50%;
  border:1px solid rgba(130,170,255,.24);
  background:rgba(61,125,235,.06);
  color:var(--text-muted);
}
.empty-icon svg{width:27px;height:27px}
.testimonial-empty h3{
  color:var(--text-strong);
  font-size:18px;
  margin-bottom:5px;
}
.testimonial-empty p{
  font-size:14px;
  color:var(--text-muted);
  max-width:560px;
  line-height:1.8;
}
.assurance-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  background:rgba(16,26,43,.7);
  border-radius:var(--radius-lg);
  overflow:hidden;
}
.assurance-item{
  padding:28px 22px;
  display:flex;
  align-items:center;
  gap:16px;
  border-right:1px solid var(--border);
  transition:background var(--transition);
}
.assurance-item:last-child{border-right:0}
.assurance-item:hover{
  background:rgba(61,125,235,.07);
}
.assurance-icon{
  width:42px;height:42px;
  display:grid;
  place-items:center;
  border-radius:14px;
  color:var(--accent);
  background:rgba(45,224,197,.06);
  border:1px solid rgba(45,224,197,.18);
  flex-shrink:0;
}
.assurance-icon svg{width:22px;height:22px}
.assurance-item h3{
  font-size:15px;
  color:var(--text-strong);
}
.assurance-item p{
  font-size:13px;
  color:var(--text-muted);
  margin-top:3px;
}
.news-section{
  background:
    radial-gradient(700px 320px at 6% 30%,rgba(61,125,235,.05),transparent 70%);
}
.update-list{
  border-top:1px solid var(--border);
}
.update-card{
  display:grid;
  grid-template-columns:140px minmax(0,1.4fr) minmax(0,2fr) 130px 34px;
  align-items:center;
  gap:18px;
  padding:20px 8px;
  border-bottom:1px solid rgba(130,170,255,.08);
  border-radius:12px;
  transition:background var(--transition),transform var(--transition);
}
.update-card:hover{
  background:rgba(45,224,197,.04);
  transform:translateX(4px);
}
.update-tag{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:fit-content;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(61,125,235,.12);
  border:1px solid rgba(61,125,235,.24);
  font-size:12px;
  font-weight:600;
  color:#9CC0F8;
}
.update-card .update-title{
  font-size:16px;
  font-weight:700;
  color:var(--text-strong);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  transition:color var(--transition);
}
.update-card:hover .update-title{
  color:var(--accent);
}
.update-desc{
  font-size:14px;
  color:var(--text-muted);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.update-date{
  font-size:13px;
  color:#7E92AF;
  text-align:right;
  font-variant-numeric:tabular-nums;
}
.update-arrow{
  width:30px;height:30px;
  margin-left:auto;
  display:grid;
  place-items:center;
  border-radius:50%;
  color:var(--text);
  border:1px solid transparent;
  transition:border-color var(--transition),color var(--transition),transform var(--transition);
}
.update-card:hover .update-arrow{
  color:var(--accent);
  transform:translateX(4px);
}
.info-empty{
  border:1px dashed rgba(130,170,255,.28);
  border-radius:var(--radius-lg);
  padding:36px 24px;
  display:flex;
  align-items:center;
  gap:16px;
  background:rgba(20,32,50,.3);
  color:var(--text-muted);
}
.info-empty svg{
  width:26px;height:26px;
  flex-shrink:0;
}
.info-empty p{
  font-size:14px;
}
.faq-section{
  background:#0D1624;
}
.faq-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
.faq-item{
  background:rgba(16,26,43,.72);
  border:1px solid rgba(130,170,255,.12);
  border-radius:18px;
  transition:border-color var(--transition),background var(--transition),box-shadow var(--transition);
}
.faq-item:hover{
  border-color:rgba(45,224,197,.26);
}
.faq-item[open]{
  border-color:rgba(45,224,197,.3);
  background:rgba(17,29,46,.76);
  box-shadow:0 14px 40px rgba(2,6,18,.2);
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 22px;
  cursor:pointer;
  list-style:none;
  font-size:16px;
  font-weight:600;
  color:var(--text-strong);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--accent)}
.faq-icon{
  width:30px;height:30px;
  flex-shrink:0;
  display:grid;
  place-items:center;
  border-radius:50%;
  border:1px solid rgba(130,170,255,.24);
  font-size:20px;
  font-style:normal;
  line-height:1;
  color:var(--accent);
  transition:transform .25s,background .25s,border-color .25s;
}
.faq-item[open] .faq-icon{
  transform:rotate(45deg);
  background:rgba(45,224,197,.1);
  border-color:var(--accent);
}
.faq-item .answer{
  padding:0 22px 22px;
  font-size:14px;
  color:var(--text);
  line-height:1.9;
}
.faq-item .answer a{
  color:var(--accent);
  border-bottom:1px solid rgba(45,224,197,.3);
}
.cta-band{
  position:relative;
  padding-block:clamp(72px,10vw,118px);
  border-radius:32px;
  overflow:hidden;
  background:
    linear-gradient(92deg,rgba(10,14,25,.94),rgba(12,21,38,.72)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border:1px solid var(--border);
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-10%;bottom:-20%;
  width:50%;
  height:80%;
  background:
    repeating-linear-gradient(104deg,transparent 0 26px,rgba(45,224,197,.07) 26px 27px);
  transform:rotate(-4deg);
  pointer-events:none;
}
.cta-content{
  max-width:570px;
  padding-left:24px;
}
.cta-content .section-kicker{
  color:var(--accent);
}
.cta-content h2{
  font-size:clamp(28px,4vw,42px);
  line-height:1.28;
  color:var(--text-strong);
}
.cta-content p{
  margin-top:18px;
  font-size:16px;
  color:#BCCCE2;
  line-height:1.9;
}
.cta-buttons{
  margin-top:30px;
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}
.btn-footer-cta{
  height:56px;
  padding:0 34px;
  font-size:17px;
  background:linear-gradient(135deg,#2DE0C5,#3D7DEB);
  color:#04121E;
  font-weight:800;
  border-radius:999px;
  box-shadow:0 14px 36px rgba(45,224,197,.18);
  transition:transform var(--transition),box-shadow var(--transition);
}
.btn-footer-cta:hover{
  transform:translateY(-3px);
  box-shadow:0 18px 44px rgba(45,224,197,.24);
}
.btn-text-footer{
  height:52px;
  padding:0 24px;
  border:1px solid rgba(130,170,255,.28);
  border-radius:999px;
  color:#C9D6EA;
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.btn-text-footer:hover{
  border-color:var(--accent);
  color:#ffffff;
}
.site-footer{
  padding-top:clamp(48px,7vw,86px);
  background:#070B13;
  border-top:1px solid rgba(130,170,255,.1);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr 1.1fr;
  gap:clamp(32px,5vw,64px);
  padding-bottom:50px;
}
.footer-brand .brand{
  margin-bottom:14px;
}
.footer-brand .brand-text{
  font-size:22px;
}
.footer-desc{
  font-size:14px;
  color:var(--text-muted);
  line-height:1.9;
  max-width:330px;
}
.footer-col h4{
  font-size:15px;
  color:var(--text-strong);
  padding-bottom:12px;
  margin-bottom:16px;
  border-bottom:1px solid rgba(130,170,255,.08);
}
.footer-col ul li{
  margin-bottom:9px;
}
.footer-col ul a{
  font-size:14px;
  color:#93A5C0;
  transition:color var(--transition),padding-left var(--transition);
}
.footer-col ul a:hover{
  color:var(--accent);
  padding-left:4px;
}
.footer-contact{
  font-size:14px;
  color:#93A5C0;
  line-height:1.9;
}
.footer-contact span{
  color:#ADBBD0;
}
.footer-bottom{
  padding:22px 0;
  border-top:1px solid rgba(130,170,255,.08);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
}
.footer-bottom p{
  font-size:13px;
  color:#6D809D;
}
.back-top{
  position:fixed;
  right:28px;
  bottom:28px;
  width:46px;
  height:46px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(16,26,43,.84);
  border:1px solid rgba(45,224,197,.24);
  color:var(--accent);
  box-shadow:0 10px 24px rgba(2,6,18,.3);
  backdrop-filter:blur(10px);
  z-index:80;
  transition:transform var(--transition),box-shadow var(--transition),background var(--transition);
  opacity:.95;
}
.back-top:hover{
  transform:translateY(-4px);
  background:rgba(45,224,197,.14);
  box-shadow:0 12px 28px rgba(2,6,18,.4);
}
.back-top svg{
  width:20px;height:20px;
  transform:rotate(-90deg);
}
@media (max-width:1024px){
  .bento-grid{
    grid-template-columns:repeat(3,1fr);
    grid-auto-rows:152px;
  }
  .featured-card{
    grid-column:span 2;
    grid-row:span 2;
  }
  .wide-media-card{
    grid-column:span 2;
    grid-row:span 2;
  }
  .mini-card h3{
    font-size:15px;
  }
  .assurance-strip{
    grid-template-columns:repeat(2,1fr);
  }
  .assurance-item{
    border-bottom:1px solid var(--border);
  }
  .assurance-item:nth-child(2){
    border-right:0;
  }
  .assurance-item:nth-child(3),
  .assurance-item:nth-child(4){
    border-bottom:0;
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
  }
}
@media (max-width:820px){
  .header-inner{
    flex-wrap:wrap;
  }
  .nav-shell{
    position:fixed;
    top:0;left:0;right:0;
    padding:76px 28px 24px;
    background:rgba(10,14,25,.96);
    backdrop-filter:blur(20px);
    flex-direction:column;
    align-items:stretch;
    gap:16px;
    border-bottom:1px solid var(--border);
    box-shadow:0 24px 50px rgba(2,6,18,.4);
    transform:translateY(-12px);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:opacity .25s,transform .25s,visibility .25s;
    height:auto;
    z-index:90;
  }
  .nav-shell.open{
    transform:translateY(0);
    opacity:1;
    visibility:visible;
    pointer-events:auto;
  }
  .main-nav{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
  }
  .nav-link{
    display:block;
    padding:12px 10px;
    border-radius:12px;
  }
  .nav-link::after{
    left:0;
    right:auto;
    transform:none;
    bottom:4px;
  }
  .nav-link.active{
    background:rgba(61,125,235,.1);
  }
  .header-actions{
    flex-wrap:wrap;
    gap:8px;
  }
  .nav-toggle{
    display:flex;
    margin-left:auto;
  }
  .hero-grid{
    grid-template-columns:1fr;
    gap:30px;
  }
  .hero-copy h1{
    font-size:clamp(34px,8vw,52px);
  }
  .hero-visual{
    order:2;
    min-height:360px;
  }
  .hero-bg{
    opacity:1;
  }
  .entry-demo{
    width:min(340px,90%);
  }
  .news-section .update-card{
    grid-template-columns:minmax(0,1fr) auto;
    grid-template-rows:auto auto auto;
    gap:10px;
    padding:16px 6px;
  }
  .update-tag{
    grid-column:1;
    grid-row:1;
  }
  .update-title{
    grid-column:1 / -1;
    grid-row:1;
    padding-left:92px;
    white-space:nowrap;
  }
  .update-desc{
    grid-column:1 / -1;
    grid-row:2;
  }
  .update-date{
    grid-column:1;
    grid-row:3;
    text-align:left;
    justify-self:start;
    padding-left:92px;
  }
  .update-arrow{
    grid-column:2;
    grid-row:3;
    justify-self:end;
  }
  .faq-grid{
    grid-template-columns:1fr;
  }
}
@media (max-width:680px){
  .hero{
    padding-top:110px;
  }
  .hero-lede{
    font-size:17px;
  }
  .hero-points{
    gap:10px 12px;
  }
  .bento-grid{
    display:flex;
    flex-direction:column;
    gap:14px;
  }
  .bento-card{
    height:auto;
    min-height:170px;
  }
  .featured-card{
    display:flex;
    flex-direction:column;
  }
  .featured-card .card-media{
    height:150px;
    order:-1;
  }
  .media-card{
    min-height:190px;
  }
  .media-card .card-body{
    display:flex;
    flex-direction:column;
  }
  .media-card .card-copy{
    order:1;
    padding:20px;
  }
  .media-card .card-media{
    height:140px;
  }
  .testimonial-empty{
    flex-direction:column;
    text-align:center;
  }
  .section-head{
    flex-direction:column;
    align-items:flex-start;
    gap:8px;
  }
  .cta-band{
    padding-inline:12px;
  }
  .cta-content{
    padding-left:10px;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:30px;
  }
  .footer-bottom{
    flex-direction:column;
  }
  .back-top{
    right:16px;
    bottom:16px;
  }
}
@media (max-width:520px){
  .hero-actions .btn{
    width:100%;
  }
  .hero-visual{
    display:none;
  }
  .hero-copy h1{
    font-size:35px;
  }
  .update-card{
    grid-template-columns:1fr;
    grid-template-rows:auto auto auto auto;
  }
  .update-card .update-title{
    grid-column:1;
    padding-left:0;
    white-space:normal;
  }
  .update-date{
    grid-column:1;
    padding-left:0;
    text-align:left;
  }
  .update-desc{
    display:none;
  }
  .update-arrow{
    grid-column:1;
    justify-self:start;
  }
  .assurance-strip{
    grid-template-columns:1fr;
  }
  .assurance-item{
    border-right:0;
    border-bottom:1px solid var(--border);
  }
  .assurance-item:last-child{
    border-bottom:0;
  }
  .btn-secondary,.btn-primary{
    width:100%;
  }
  .btn-footer-cta,.btn-text-footer{
    width:100%;
  }
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
}

/* roulang page: article */
:root {
  --bg-primary: #0A0E19;
  --bg-elevated: #101A2B;
  --brand-blue: #3D7DEB;
  --accent-teal: #2DE0C5;
  --signal-amber: #FFAE58;
  --text-primary: #E6EDF7;
  --text-body: #AEBFD6;
  --text-subtle: #93A5C0;
  --border-light: rgba(130, 170, 255, 0.14);
  --border-soft: rgba(146, 170, 210, 0.18);
  --glass-bg: rgba(20, 32, 50, 0.55);
  --card-bg: rgba(16, 26, 43, 0.7);
  --radius-card: 20px;
  --radius-inner: 12px;
  --shadow-card: 0 12px 40px rgba(2, 6, 18, 0.25);
  --shadow-hover: 0 18px 50px rgba(2, 6, 18, 0.45);
  --font-main: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --transition-main: all 0.25s ease-in-out;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  background: var(--bg-primary);
  color: var(--text-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--brand-blue);
  text-decoration: none;
  transition: var(--transition-main);
}

a:hover {
  color: var(--accent-teal);
}

button {
  font-family: var(--font-main);
  border: none;
  cursor: pointer;
  background: transparent;
  color: inherit;
}

input, textarea {
  font-family: var(--font-main);
}

.container {
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(20px, 4vw, 48px);
  padding-right: clamp(20px, 4vw, 48px);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 64px;
  background: transparent;
  transition: background-color .35s ease, box-shadow .35s ease, border-color .35s ease;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(10, 14, 25, 0.88);
  backdrop-filter: blur(18px) saturate(120%);
  -webkit-backdrop-filter: blur(18px) saturate(120%);
  border-bottom-color: var(--border-light);
  box-shadow: 0 6px 30px rgba(0, 0, 0, 0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  color: var(--text-primary);
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-teal);
  background: rgba(45, 224, 197, 0.1);
  border-radius: 10px;
  flex-shrink: 0;
}

.brand-mark svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
}

.brand-text {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0;
  white-space: nowrap;
  color: var(--text-primary);
}

.brand-text b {
  font-weight: 800;
  color: var(--accent-teal);
  margin-left: 1px;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-soft);
  color: var(--text-primary);
  z-index: 1010;
}

.nav-toggle .close-icon {
  display: none;
}

.nav-toggle.open .open-icon {
  display: none;
}

.nav-toggle.open .close-icon {
  display: block;
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 1;
  gap: 20px;
  min-width: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 auto 0 24px;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  border-radius: 8px;
  transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
  white-space: nowrap;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent-teal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s ease;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(45, 224, 197, 0.06);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-link.active {
  color: var(--text-primary);
  font-weight: 600;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  font-weight: 600;
  transition: var(--transition-main);
  white-space: nowrap;
  border: 1px solid transparent;
  text-align: center;
  line-height: 1.2;
}

.btn:hover {
  transform: translateY(-2px);
  color: inherit;
}

.btn:focus-visible {
  outline: 2px solid var(--accent-teal);
  outline-offset: 3px;
}

.btn-ghost-sm {
  height: 40px;
  padding: 0 18px;
  font-size: 14px;
  background: transparent;
  border-color: rgba(174, 191, 214, 0.4);
  color: var(--text-body);
}

.btn-ghost-sm:hover {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
  box-shadow: 0 0 0 4px rgba(45, 224, 197, 0.08);
}

.btn-primary-sm {
  height: 40px;
  padding: 0 20px;
  font-size: 14px;
  background: linear-gradient(135deg, #2DE0C5 0%, #4C9BFF 130%);
  color: #04121E;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(45, 224, 197, 0.18);
}

.btn-primary-sm:hover {
  background: linear-gradient(135deg, #43ECC9 0%, #63AEFF 130%);
  box-shadow: 0 6px 30px rgba(45, 224, 197, 0.3);
  color: #04121E;
  transform: translateY(-2px);
}

/* Article page main */
.article-page {
  padding-top: 64px;
  position: relative;
}

.article-banner {
  background: linear-gradient(180deg, rgba(61,125,235,0.12) 0%, rgba(10,14,25,0.8) 100%), url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
  position: relative;
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--border-light);
}

.article-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 20% 40%, rgba(45,224,197,0.06) 0%, transparent 55%);
  pointer-events: none;
}

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

.breadcrumb-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-subtle);
  margin-bottom: 20px;
}

.breadcrumb-nav a {
  color: var(--text-subtle);
  transition: color 0.25s;
}

.breadcrumb-nav a:hover {
  color: var(--accent-teal);
}

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

.breadcrumb-arrow {
  opacity: 0.5;
  font-size: 12px;
}

.article-title-wrap {
  max-width: 980px;
}

.article-title-wrap h1 {
  font-size: clamp(32px, 4.2vw, 46px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.article-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid rgba(130, 170, 255, 0.1);
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-subtle);
  line-height: 1.4;
}

.article-meta-item i {
  color: var(--accent-teal);
  font-style: normal;
  opacity: 0.8;
}

.article-content-page {
  position: relative;
  padding: 55px 0 0;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 48px;
  align-items: start;
}

.article-main-body {
  min-width: 0;
  max-width: 100%;
}

.article-body-cover {
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: 36px;
  position: relative;
  box-shadow: var(--shadow-card);
}

.article-body-cover img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.article-body {
  font-size: 18px;
  line-height: 1.9;
  color: #C4D1E5;
  overflow-wrap: break-word;
  word-break: break-word;
}

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

.article-body h2 {
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-primary);
  margin: 48px 0 20px;
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text-primary);
  margin: 32px 0 16px;
  padding-left: 12px;
  border-left: 3px solid var(--accent-teal);
}

.article-body ul, .article-body ol {
  margin: 0 0 1.6em;
  padding-left: 1.4em;
}

.article-body li {
  margin-bottom: 0.6em;
}

.article-body a {
  color: var(--accent-teal);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(45, 224, 197, 0.3);
}

.article-body a:hover {
  color: var(--brand-blue);
}

.article-body blockquote {
  border-left: 4px solid var(--accent-teal);
  background: rgba(45, 224, 197, 0.05);
  border-radius: 0 14px 14px 0;
  padding: 18px 22px;
  margin: 28px 0;
  color: var(--text-body);
  font-size: 17px;
}

.article-body img {
  border-radius: 16px;
  margin: 28px 0;
  width: 100%;
}

.article-body figcaption {
  font-size: 13px;
  color: var(--text-subtle);
  text-align: center;
  margin-top: -16px;
  margin-bottom: 20px;
}

.article-body table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  overflow: hidden;
  margin: 28px 0;
  font-size: 15px;
}

.article-body table th {
  background: rgba(16, 26, 43, 0.9);
  color: var(--text-primary);
  font-weight: 600;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(130, 170, 255, 0.14);
}

.article-body table td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(130, 170, 255, 0.08);
  color: var(--text-body);
}

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

.article-body code {
  background: rgba(45, 224, 197, 0.08);
  color: var(--accent-teal);
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 0.9em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.article-body hr {
  border: none;
  height: 1px;
  background: rgba(130, 170, 255, 0.15);
  margin: 40px 0;
}

.article-body iframe {
  max-width: 100%;
  border-radius: 16px;
  margin: 24px 0;
}

.article-body .wp-block-quote, .article-body .blockquote {
  border-left: 4px solid var(--accent-teal);
  background: rgba(45, 224, 197, 0.05);
  border-radius: 0 14px 14px 0;
  padding: 18px 22px;
  margin: 28px 0;
}

/* right toc (static for article) */
.article-sidebar {
  position: sticky;
  top: 90px;
  display: none;
}

.article-sidebar .sidebar-card {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: 18px;
  padding: 20px;
}

.article-sidebar h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.sidebar-link-item {
  display: block;
  font-size: 13.5px;
  color: var(--text-subtle);
  padding: 7px 0;
  border-bottom: 1px solid rgba(130,170,255,0.06);
  transition: color 0.25s, padding-left 0.25s;
}

.sidebar-link-item:hover {
  color: var(--accent-teal);
  padding-left: 4px;
}

.article-not-found {
  padding: 70px 0;
  min-height: 55vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.not-found-box {
  text-align: center;
  max-width: 500px;
  border: 1px dashed rgba(130,170,255,0.25);
  border-radius: 24px;
  background: rgba(16, 26, 43, 0.5);
  padding: 50px 40px;
}

.not-found-box .nf-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  color: var(--accent-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(45, 224, 197, 0.08);
  border-radius: 50%;
}

.not-found-box h2 {
  color: var(--text-primary);
  font-size: 22px;
  margin-bottom: 12px;
}

.not-found-box p {
  color: var(--text-subtle);
  font-size: 15px;
  margin-bottom: 20px;
}

.article-tags-area {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid rgba(130,170,255,0.1);
}

.article-tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-body);
  background: rgba(61, 125, 235, 0.1);
  border: 1px solid rgba(61, 125, 235, 0.15);
  border-radius: 999px;
  padding: 5px 14px;
  transition: all 0.25s ease;
}

.article-tag-chip:hover {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
  background: rgba(45, 224, 197, 0.09);
}

.related-posts-section {
  padding: 60px 0 80px;
  background: rgba(16, 26, 43, 0.25);
  border-top: 1px solid var(--border-light);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}

.section-title {
  font-size: clamp(24px, 3vw, 30px);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.section-subnote {
  font-size: 15px;
  color: var(--text-subtle);
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
}

.related-item {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  padding: 18px 22px;
  transition: var(--transition-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.related-item:hover {
  transform: translateY(-3px);
  border-color: rgba(45, 224, 197, 0.25);
  box-shadow: var(--shadow-hover);
}

.related-item-main {
  min-width: 0;
}

.related-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.related-item p {
  font-size: 13.5px;
  color: var(--text-subtle);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.related-item-meta {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-subtle);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.back-category-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-teal);
  transition: gap 0.25s;
}

.back-category-link:hover {
  color: var(--brand-blue);
  gap: 12px;
}

.article-bottom-cta {
  padding: 50px 0 0;
}

.article-cta-box {
  background: linear-gradient(145deg, rgba(61, 125, 235, 0.15), rgba(45, 224, 197, 0.06));
  border: 1px solid rgba(45, 224, 197, 0.2);
  border-radius: 24px;
  padding: 36px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.article-cta-box .cta-info h3 {
  color: var(--text-primary);
  font-size: 22px;
  margin-bottom: 6px;
}

.article-cta-box .cta-info p {
  color: var(--text-body);
  font-size: 15px;
}

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

.site-footer {
  background: #070C14;
  border-top: 1px solid rgba(130,170,255,0.1);
  padding: 60px 0 28px;
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 1fr 1fr;
  gap: clamp(30px, 4vw, 60px);
  margin-bottom: 40px;
}

.footer-brand .brand {
  margin-bottom: 14px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-subtle);
  margin-top: 12px;
  max-width: 320px;
}

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

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  font-size: 14px;
  color: var(--text-body);
  display: inline-block;
  position: relative;
  transition: color 0.25s, transform 0.25s;
}

.footer-col ul a:hover {
  color: var(--accent-teal);
  transform: translateX(3px);
}

.footer-contact {
  font-size: 14px;
  line-height: 2;
  color: var(--text-body);
}

.footer-contact span {
  color: var(--text-subtle);
}

.footer-bottom {
  border-top: 1px solid rgba(130,170,255,0.1);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-subtle);
  font-size: 13px;
}

.footer-bottom a {
  color: var(--text-subtle);
}

.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(16, 26, 43, 0.9);
  border: 1px solid var(--border-light);
  color: var(--text-body);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99;
  transition: all 0.3s ease;
  box-shadow: 0 8px 28px rgba(0,0,0,0.4);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
}

.back-to-top:hover {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
  transform: translateY(-4px);
}

@media (min-width: 1281px) {
  .article-sidebar {
    display: block;
  }
}

@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .article-sidebar {
    display: none !important;
  }
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 820px) {
  .nav-toggle {
    display: inline-flex;
  }
  .nav-shell {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 25, 0.98);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 84px 24px 30px;
    height: 100vh;
    overflow-y: auto;
    border-bottom: 1px solid var(--border-light);
    display: none;
    z-index: 1005;
  }
  .nav-shell.open {
    display: flex;
  }
  .main-nav {
    flex-direction: column;
    flex-wrap: wrap;
    gap: 2px;
    margin: 0;
    align-items: stretch;
  }
  .nav-link {
    padding: 14px 16px;
    font-size: 17px;
    border-radius: 10px;
  }
  .nav-link::after {
    display: none;
  }
  .header-actions {
    margin-top: 24px;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .btn-ghost-sm, .btn-primary-sm {
    width: 100%;
    height: 48px;
    justify-content: center;
  }
  .site-header {
    background: rgba(10, 14, 25, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-brand {
    grid-column: auto;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
  }
  .article-banner {
    padding: 70px 0 42px;
  }
  .article-meta-row {
    margin-top: 16px;
  }
  .article-banner .breadcrumb-nav .current {
    max-width: 200px;
  }
  .article-title-wrap h1 {
    font-size: 30px;
    line-height: 1.3;
  }
  .related-posts-section {
    padding: 45px 0 60px;
  }
  .related-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .related-item-meta {
    font-size: 12.5px;
  }
  .article-cta-box {
    padding: 26px 20px;
  }
}

@media (max-width: 520px) {
  .brand-text {
    font-size: 15px;
  }
  .brand-mark {
    width: 30px;
    height: 30px;
  }
  .header-inner {
    gap: 0;
  }
  .article-banner {
    padding: 60px 0 36px;
  }
  .breadcrumb-nav {
    font-size: 12px;
    margin-bottom: 14px;
  }
  .breadcrumb-nav .current {
    max-width: 140px;
  }
  .article-title-wrap h1 {
    font-size: 26px;
  }
  .article-meta-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .article-body {
    font-size: 16.5px;
  }
  .article-body h2 {
    font-size: 23px;
  }
  .article-body h3 {
    font-size: 19px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .section-subnote {
    font-size: 14px;
  }
}

/* roulang page: category2 */
:root{
  --bg:#0A0E19;
  --bg-elev:#101A2B;
  --bg-card:rgba(20,32,50,0.62);
  --line:rgba(130,170,255,0.14);
  --line-soft:rgba(130,170,255,0.08);
  --primary:#3D7DEB;
  --accent:#2DE0C5;
  --signal:#FFAE58;
  --text:#E4EDF7;
  --text-body:#AEBFD6;
  --muted:#93A5C0;
  --btn-text:#04121E;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --shadow-card:0 12px 40px rgba(2,6,18,.25);
  --shadow-float:0 18px 48px rgba(2,8,20,.38);
  --container:1240px;
  --space-section:clamp(64px, 8vw, 104px);
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --header-h:64px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;font-size:16px}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input{font:inherit;border:0;outline:none}
.container{max-width:var(--container);margin:0 auto;padding-left:clamp(20px,4vw,48px);padding-right:clamp(20px,4vw,48px)}
::selection{background:rgba(45,224,197,.2);color:#fff}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(10,14,25,.82);backdrop-filter:blur(18px) saturate(120%);-webkit-backdrop-filter:blur(18px) saturate(120%);border-bottom:1px solid var(--line-soft)}
.header-inner{height:var(--header-h);display:flex;align-items:center;gap:24px;position:relative}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;border-radius:12px;color:var(--accent);background:rgba(45,224,197,.1);border:1px solid rgba(45,224,197,.28);flex-shrink:0}
.brand-mark svg{width:21px;height:21px}
.brand-text{font-size:18px;font-weight:700;color:#F2F6FC;letter-spacing:.3px}
.brand-text b{color:var(--accent);font-weight:700;margin-left:2px}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;background:transparent;color:var(--text-body);align-items:center;justify-content:center;cursor:pointer;transition:all .25s}
.nav-toggle:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav-toggle .close-icon{display:none}
.nav-toggle[aria-expanded="true"] .open-icon{display:none}
.nav-toggle[aria-expanded="true"] .close-icon{display:block}
.nav-shell{display:flex;flex:1;align-items:center;justify-content:space-between;gap:24px}
.main-nav{display:flex;align-items:center;gap:26px}
.nav-link{position:relative;display:inline-block;padding:20px 0 18px;font-size:15px;font-weight:500;color:var(--text-body);transition:color .25s;white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:0;bottom:10px;width:100%;height:2px;border-radius:2px;background:var(--accent);transform:scaleX(0);transform-origin:center;transition:transform .25s ease}
.nav-link:hover,.nav-link:focus-visible{color:var(--text)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link.active{color:#fff}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;height:48px;padding:0 24px;border-radius:999px;font-size:16px;font-weight:700;transition:all .28s ease;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn-primary{background:linear-gradient(92deg,var(--accent),#6AD0FF);color:var(--btn-text);border:1px solid transparent;box-shadow:0 0 24px rgba(45,224,197,.16)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(45,224,197,.28);color:#031018}
.btn-primary:focus-visible,.btn-ghost:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.btn-ghost{height:48px;background:transparent;border:1px solid rgba(180,205,255,.3);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-ghost-sm,.btn-primary-sm{display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 18px;border-radius:999px;font-size:14px;font-weight:600;cursor:pointer;transition:all .25s;white-space:nowrap}
.btn-primary-sm{background:linear-gradient(92deg,var(--accent),#6AD0FF);color:var(--btn-text);border:1px solid transparent;box-shadow:0 0 18px rgba(45,224,197,.12)}
.btn-primary-sm:hover{box-shadow:0 6px 24px rgba(45,224,197,.28);transform:translateY(-1px)}
.btn-ghost-sm{background:transparent;border:1px solid rgba(180,205,255,.26);color:var(--text-body)}
.btn-ghost-sm:hover{border-color:var(--accent);color:var(--accent)}
.text-accent{color:var(--accent)}
.text-primary{color:var(--primary)}
.section-subtitle{color:var(--accent);font-size:14px;font-weight:600;letter-spacing:.12em}
.section-title{font-size:clamp(26px,3vw,36px);font-weight:700;line-height:1.35;margin-top:8px}
.section-lead{color:var(--text-body);font-size:16px;line-height:1.8;margin-top:14px;max-width:760px}
.faq-title{font-size:20px;font-weight:700}
.section{padding-top:var(--space-section);padding-bottom:var(--space-section)}

/* Page Hero */
.page-hero{position:relative;background:#0D1524;border-bottom:1px solid var(--line-soft);overflow:hidden}
.page-hero .hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center 30% / cover no-repeat;opacity:.28}
.page-hero .hero-bg::after{content:"";position:absolute;inset:0;background:radial-gradient(60% 80% at 75% 30%,rgba(61,125,235,.12),transparent 60%),linear-gradient(100deg,rgba(10,14,25,.96) 10%,rgba(10,14,25,.7) 60%,rgba(10,14,25,.8))}
.hero-content{position:relative;z-index:1;padding:clamp(56px,7vw,88px) 0 clamp(48px,6vw,76px)}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted);margin-bottom:22px}
.breadcrumb a{color:var(--muted);transition:color .2s}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb span{color:#CBD9EB}
.breadcrumb svg{width:14px;height:14px;color:rgba(174,191,214,.5)}
.hero-title{font-size:clamp(32px,5vw,52px);font-weight:800;line-height:1.2;color:#F3F7FC;max-width:820px}
.hero-title .line{color:var(--accent)}
.hero-title .primary-up{color:var(--primary)}
.hero-desc{color:var(--text-body);max-width:760px;font-size:16.5px;line-height:1.9;margin-top:20px}

/* Layout Grid */
.content-layout{display:grid;grid-template-columns:264px minmax(0,1fr);gap:clamp(24px,3vw,48px);align-items:start;padding:clamp(48px,6vw,76px) 0}
.left-rail{position:sticky;top:calc(var(--header-h) + 20px);display:block;background:rgba(16,26,43,.55);border:1px solid var(--line-soft);border-radius:20px;padding:16px}
.rail-title{font-size:14px;font-weight:600;color:#fff;padding:10px 14px 14px;border-bottom:1px solid var(--line-soft);display:flex;align-items:center;gap:8px}
.rail-title svg{width:17px;height:17px;color:var(--accent)}
.rail-nav{list-style:none;padding:10px 0}
.rail-nav li a{display:flex;align-items:center;justify-content:space-between;padding:11px 14px;border-radius:12px;font-size:14px;color:var(--text-body);transition:background .25s,color .25s;gap:10px}
.rail-nav li a:hover,.rail-nav li a.active{color:#fff;background:rgba(61,125,235,.18)}
.rail-nav li a .rail-ico{display:inline-flex;width:24px;height:24px;border-radius:8px;align-items:center;justify-content:center;background:rgba(255,255,255,.05);color:var(--accent);flex-shrink:0}
.rail-nav li a .rail-ico svg{width:15px;height:15px}
.rail-nav li a span{flex:1}
.rail-nav li a .arrow{font-size:13px;color:rgba(174,191,214,.45);transition:transform .25s}
.rail-nav li a:hover .arrow{transform:translateX(3px);color:var(--accent)}
.rail-cta{margin-top:8px;padding:16px 14px 6px;border-top:1px solid var(--line-soft)}
.rail-cta p{font-size:13px;color:var(--muted);line-height:1.7;margin-bottom:14px}
.rail-cta .btn{height:42px;font-size:14px;width:100%;padding:0 18px}

.right-content{min-width:0}

/* Panel card */
.portal-panel{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);padding:clamp(24px,3vw,38px);margin-bottom:28px;backdrop-filter:blur(14px) saturate(110%);-webkit-backdrop-filter:blur(14px) saturate(110%)}
.panel-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:26px}
.panel-tag{display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border-radius:999px;background:rgba(45,224,197,.08);border:1px solid rgba(45,224,197,.2);color:var(--accent);font-size:13px;font-weight:600}
.panel-head .desc{color:var(--text-body);font-size:15px;line-height:1.8;margin-top:8px;max-width:680px}
.card-grid.list-card{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.entry-item{position:relative;display:flex;gap:14px;align-items:center;justify-content:space-between;padding:16px;border:1px solid var(--line-soft);border-radius:16px;background:rgba(16,26,43,.4);transition:all .26s ease}
.entry-item:hover{border-color:rgba(45,224,197,.5);transform:translateY(-3px);background:rgba(22,36,58,.72);box-shadow:0 10px 26px rgba(2,6,18,.24)}
.entry-content{display:flex;align-items:flex-start;gap:14px;flex:1;min-width:0}
.entry-ico{width:42px;height:42px;border-radius:13px;background:rgba(61,125,235,.13);border:1px solid rgba(61,125,235,.18);display:flex;align-items:center;justify-content:center;color:#7BA6FF;flex-shrink:0;transition:background .25s,color .25s}
.entry-item:hover .entry-ico{background:rgba(45,224,197,.12);border-color:rgba(45,224,197,.24);color:var(--accent)}
.entry-ico svg{width:20px;height:20px}
.entry-text h3{font-size:16px;font-weight:700;line-height:1.4}
.entry-text p{color:var(--muted);font-size:13px;line-height:1.65;margin-top:3px}
.entry-tag{font-size:12px;color:var(--accent);border:1px solid rgba(45,224,197,.2);background:rgba(45,224,197,.05);border-radius:999px;padding:3px 10px;white-space:nowrap}
.entry-go{display:flex;align-items:center;color:var(--muted);transition:color .22s}
.entry-item:hover .entry-go{color:var(--accent)}
.entry-go svg{width:17px;height:17px}

/* Directory groups */
.dir-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.dir-card{border:1px solid var(--line);border-radius:var(--radius-md);background:rgba(10,17,29,.5);padding:22px;position:relative;overflow:hidden;transition:border-color .3s,transform .3s}
.dir-card:hover{border-color:rgba(61,125,235,.4);transform:translateY(-2px)}
.dir-card-number{position:absolute;top:-8px;right:10px;font-size:56px;font-weight:800;line-height:1;color:rgba(61,125,235,.08);letter-spacing:-1px}
.dir-card h4{font-size:17px;font-weight:700;color:var(--text);margin-bottom:6px;position:relative;display:flex;align-items:center;gap:9px}
.dir-card h4 svg{width:19px;height:19px;color:var(--accent)}
.dir-intro{font-size:13px;color:var(--muted);margin-bottom:17px;position:relative}
.dir-list{list-style:none;position:relative}
.dir-list li{margin-bottom:5px}
.dir-list a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:9px 12px;border-radius:10px;font-size:14px;color:var(--text-body);transition:all .24s}
.dir-list a:hover{background:rgba(61,125,235,.14);color:var(--text)}
.dir-list a .d-item{display:flex;align-items:center;gap:9px}
.dir-list a .d-dot{width:5px;height:5px;border-radius:50%;background:var(--primary);flex-shrink:0;transition:background .24s,box-shadow .24s}
.dir-list a:hover .d-dot{background:var(--accent);box-shadow:0 0 8px rgba(45,224,197,.5)}
.dir-list a .d-go{color:var(--muted);font-size:12px;opacity:.65;transition:opacity .2s}
.dir-list a:hover .d-go{opacity:1;color:var(--accent)}
.dir-note{position:relative;margin-top:12px;padding-top:12px;border-top:1px dashed rgba(130,170,255,.16);font-size:12px;color:var(--muted)}
.dir-note b{color:var(--signal);font-weight:600}

/* Steps */
.steps-head{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:26px}
.step-item{position:relative;padding:20px 18px 18px;border-radius:16px;border:1px solid var(--line-soft);background:rgba(10,17,29,.38);transition:all .26s}
.step-item:hover{border-color:rgba(45,224,197,.4);box-shadow:0 12px 28px rgba(2,6,18,.22)}
.step-num{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#5fc9ff);color:var(--btn-text);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;margin-bottom:14px}
.step-item h4{font-size:15px;font-weight:700;color:var(--text);margin-bottom:6px}
.step-item p{font-size:13px;color:var(--muted);line-height:1.65}
.step-card{background:rgba(16,26,43,.55);border:1px solid var(--line);border-radius:var(--radius-lg);padding:clamp(24px,3vw,34px)}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{border:1px solid var(--line);border-radius:16px;background:rgba(16,26,43,.42);overflow:hidden;transition:border-color .25s,background .25s}
.faq-item[open]{border-color:rgba(45,224,197,.4)}
.faq-item summary{list-style:none;display:flex;align-items:center;gap:12px;padding:18px 18px;cursor:pointer;font-size:15px;font-weight:600;color:var(--text);user-select:none;transition:color .2s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus-icon{width:24px;height:24px;flex-shrink:0;border-radius:50%;background:rgba(255,255,255,.05);border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;color:var(--accent);transition:all .25s}
.faq-item summary .plus-icon svg{width:13px;height:13px;transition:transform .25s}
.faq-item[open] summary{color:#fff}
.faq-item[open] summary .plus-icon{background:rgba(45,224,197,.14);border-color:rgba(45,224,197,.4)}
.faq-item[open] summary .plus-icon svg{transform:rotate(45deg)}
.faq-item .faq-answer{padding:0 56px 20px 52px;color:var(--text-body);font-size:14px;line-height:1.85}
.faq-item:hover{border-color:rgba(61,125,235,.35)}

/* Security strip */
.security-band{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}
.security-item{display:flex;align-items:center;gap:14px;padding:16px 18px;border:1px solid var(--line-soft);border-radius:16px;background:rgba(10,17,29,.3)}
.security-item .sec-ico{width:40px;height:40px;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:var(--signal);background:rgba(255,174,88,.08);border-radius:12px}
.security-item .sec-ico svg{width:19px;height:19px}
.security-item h5{font-size:14px;color:#D7E2F0;font-weight:600}
.security-item p{font-size:12px;color:var(--muted);line-height:1.5;margin-top:2px}

/* CTA */
.portal-cta{position:relative;overflow:hidden;border-radius:22px;background:#0E1A2C;border:1px solid rgba(130,170,255,.16);margin-top:38px;padding:clamp(28px,4vw,48px) clamp(24px,4vw,44px)}
.portal-cta::before{content:"";position:absolute;left:0;top:0;bottom:0;width:46%;background:url('/assets/images/coverpic/cover-4.png') center / cover no-repeat;opacity:.14;border-right:1px solid var(--line-soft)}
.portal-cta .cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.portal-cta h3{font-size:clamp(21px,2.4vw,29px);font-weight:700;line-height:1.45;color:#F4F7FD}
.portal-cta p{color:var(--text-body);font-size:14px;margin-top:8px;max-width:560px;line-height:1.8}
.cta-btns{display:flex;gap:14px;align-items:center;flex-wrap:wrap}

/* Footer */
.site-footer{background:#070B14;border-top:1px solid var(--line-soft);padding-top:58px;padding-bottom:26px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:38px;border-bottom:1px solid rgba(130,170,255,.08)}
.footer-brand .brand{margin-bottom:16px}
.footer-desc{color:var(--muted);font-size:14px;line-height:1.8;margin-top:14px;max-width:330px}
.footer-col h4{font-size:15px;color:#E7EEF8;font-weight:700;margin-bottom:18px}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{color:var(--muted);font-size:14px;transition:color .22s}
.footer-col ul a:hover{color:var(--accent)}
.footer-contact{color:var(--muted);font-size:13px;line-height:2.1}
.footer-contact span{color:#CBD5E3}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding-top:24px;font-size:13px;color:#6b7d96}
.footer-bottom p{display:flex;align-items:center;gap:6px}

/* Back to top */
.totop{position:fixed;right:28px;bottom:28px;width:48px;height:48px;border-radius:50%;background:rgba(20,32,52,.9);border:1px solid rgba(130,170,255,.2);color:var(--accent);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:99;opacity:0;visibility:hidden;transform:translateY(12px);transition:all .3s ease;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.totop.show{opacity:1;visibility:visible;transform:none}
.totop:hover{background:rgba(45,224,197,.15);border-color:var(--accent)}
.totop svg{width:18px;height:18px}
.totop:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

/* Scrollbar */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#0C1120}
::-webkit-scrollbar-thumb{background:#29374d;border-radius:10px}
::-webkit-scrollbar-thumb:hover{background:#3a4f6b}

/* Responsive */
@media (max-width:1280px){
  .main-nav{gap:18px}
  .nav-shell{gap:14px}
}
@media (max-width:1024px){
  .content-layout{grid-template-columns:1fr}
  .left-rail{position:static;order:-1;margin-bottom:24px;overflow-x:auto;display:block}
  .rail-nav{display:flex;padding:8px 0 4px;gap:6px;overflow-x:auto}
  .rail-nav li a{white-space:nowrap;justify-content:center}
  .rail-nav li a .arrow{display:none}
  .rail-title{display:none}
  .rail-cta{display:none}
  .card-grid.list-card{grid-template-columns:1fr 1fr}
  .dir-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .nav-toggle{display:inline-flex}
  .nav-shell{display:flex;position:absolute;top:calc(var(--header-h) + 8px);left:0;right:0;background:rgba(10,14,25,.96);border:1px solid var(--line);border-radius:16px;padding:22px 20px;flex-direction:column;align-items:flex-start;gap:20px;opacity:0;visibility:hidden;transform:translateY(-8px);transition:all .28s ease}
  .nav-shell.open{opacity:1;visibility:visible;transform:none}
  .header-inner{justify-content:space-between}
  .main-nav{flex-direction:column;align-items:flex-start;width:100%;gap:6px}
  .nav-link{width:100%;padding:11px 0;border-bottom:1px solid rgba(130,170,255,.08)}
  .nav-link::after{display:none}
  .nav-link.active{color:var(--accent);border-bottom-color:var(--accent)}
  .header-actions{width:100%;flex-direction:column;align-items:stretch}
  .header-actions .btn{width:100%;height:46px}
  .btn-ghost-sm,.btn-primary-sm{width:100%;height:44px}
  .card-grid.list-card,.dir-grid{grid-template-columns:1fr}
  .security-band{grid-template-columns:1fr}
  .steps-head{grid-template-columns:1fr 1fr}
  .faq-item .faq-answer{padding:0 20px 18px 20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:520px){
  .steps-head{grid-template-columns:1fr}
  .content-layout{padding-top:36px}
  .entry-item{align-items:flex-start}
  .entry-content{flex-direction:column}
  .entry-tag{align-self:flex-start}
  .portal-cta .cta-btns{flex-direction:column;align-items:stretch;width:100%}
  .portal-cta .btn{width:100%}
  .totop{right:16px;bottom:16px}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
/* ===== Design tokens ===== */
:root {
  --bg: #0A0E19;
  --bg-up: #101A2B;
  --bg-panel: #132138;
  --card-glass: rgba(20, 32, 50, 0.55);
  --line: rgba(130, 170, 255, 0.14);
  --line-strong: rgba(130, 170, 255, 0.22);
  --primary: #3D7DEB;
  --accent: #2DE0C5;
  --signal: #FFAE58;
  --danger: #FF7A7A;
  --text: #AEBFD6;
  --text-mid: #93A5C0;
  --text-strong: #E7EDF7;
  --dark-ink: #04121E;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 12px 40px rgba(2, 6, 18, 0.25);
  --shadow-hover: 0 18px 44px rgba(2, 6, 18, 0.42);
  --container: 1240px;
  --spacer: clamp(64px, 9vw, 112px);
  --font-stack: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

/* ===== Reset / base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    radial-gradient(600px 280px at 85% 8%, rgba(45, 224, 197, 0.055), transparent 65%),
    radial-gradient(720px 360px at 12% 44%, rgba(61, 125, 235, 0.07), transparent 65%),
    radial-gradient(640px 360px at 80% 82%, rgba(61, 125, 235, 0.04), transparent 60%);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
nav ul, ul { margin: 0; padding-left: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; color: var(--text-strong); line-height: 1.3; }
p { margin: 0; }
::selection { background: rgba(45, 224, 197, 0.28); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ===== Shared layout ===== */
.container {
  width: min(var(--container), 100%);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 48px);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .25s ease, border-color .25s, box-shadow .25s, background .25s;
  white-space: nowrap;
}
.btn-primary {
  min-height: 48px;
  padding: 0 26px;
  background: linear-gradient(135deg, rgba(45, 224, 197, .92), rgba(61, 125, 235, .92));
  color: #051321;
  font-size: 16px;
  box-shadow: 0 8px 26px rgba(45, 224, 197, 0.16);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(45, 224, 197, 0.3); }
.btn-primary:active { transform: translateY(-1px); }
.btn-ghost {
  min-height: 44px;
  padding: 0 22px;
  background: transparent;
  color: var(--text-strong);
  border-color: rgba(190, 215, 255, 0.28);
  font-size: 15px;
}
.btn-ghost:hover { border-color: var(--accent); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,0,0,.2); }
.btn-block { width: 100%; }
.icon-arrow { transition: transform .25s; }
.btn:hover .icon-arrow { transform: translateX(3px); }

.btn-primary-sm, .btn-ghost-sm {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  min-height: 38px;
  padding: 0 18px;
  font-size: 14px;
  font-weight: 700;
  transition: background .25s, border .25s, box-shadow .25s, color .25s, transform .25s;
}
.btn-primary-sm {
  background: var(--accent);
  color: var(--dark-ink);
}
.btn-primary-sm:hover { box-shadow: 0 0 0 4px rgba(45,224,197,.16), 0 8px 18px rgba(45,224,197,.2); transform: translateY(-2px); }
.btn-ghost-sm {
  background: transparent;
  color: var(--text-strong);
  border: 1px solid rgba(190,215,255,.2);
}
.btn-ghost-sm:hover { border-color: var(--accent); color: #fff; }

/* ===== Brand ===== */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-strong);
  letter-spacing: .5px;
}
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: rgba(45, 224, 197, 0.1);
  border: 1px solid rgba(45, 224, 197, .35);
  color: var(--accent);
  box-shadow: inset 0 0 12px rgba(45,224,197,.08);
}
.brand-mark svg { width: 22px; height: 22px; }
.brand-text { letter-spacing: .4px; }
.brand-text b { color: var(--primary); font-weight: 800; }

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  background: transparent;
  transition: background .35s ease, box-shadow .35s, border-color .35s;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(10, 14, 25, 0.88);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  border-bottom-color: rgba(130, 170, 255, 0.08);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.24);
}
.header-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.site-header .brand-text { font-size: 18px; }
.site-header .brand-mark { width: 31px; height: 31px; border-radius: 9px; }
.site-header .brand { font-size: 18px; }
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(20, 32, 50, 0.5);
  border: 1px solid var(--line);
  color: var(--text-strong);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle svg { width: 21px; height: 21px; }
.close-icon { display: none; }
.nav-shell {
  display: flex;
  align-items: center;
  gap: 18px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-right: 10px;
}
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  padding: 8px 0;
  transition: color .25s;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.nav-link:hover { color: #fff; }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active { color: #fff; }
.nav-link.active::after { transform: scaleX(1); }
.header-actions { display: flex; align-items: center; gap: 12px; }

/* ===== Footer ===== */
.site-footer {
  background: #070B14;
  border-top: 1px solid var(--line);
  margin-top: var(--spacer);
}
.site-footer .container { padding-top: clamp(48px, 6vw, 70px); padding-bottom: 28px; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.8fr 1fr 1.1fr;
  gap: 42px;
}
.footer-brand .brand-text { font-size: 19px; }
.footer-desc {
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-mid);
  max-width: 320px;
  line-height: 1.75;
}
.footer-col h4 {
  font-size: 15px;
  color: var(--text-strong);
  margin-bottom: 16px;
  font-weight: 700;
}
.footer-col ul li { margin-bottom: 10px; font-size: 14px; }
.footer-col ul a { color: var(--text); transition: color .2s, padding-left .2s; }
.footer-col ul a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact { font-size: 13.5px; color: var(--text-mid); line-height: 1.9; }
.footer-contact span { color: #C6D5E8; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid rgba(130, 170, 255, 0.08);
  font-size: 13px;
  color: #7E8FA8;
}
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(45, 224, 197, 0.12);
  border: 1px solid rgba(45,224,197,.3);
  color: var(--accent);
  z-index: 40;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s, transform .3s, background .3s;
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { background: rgba(45,224,197,.28); transform: translateY(-3px); }
.back-top svg { width: 18px; height: 18px; }

/* ===== Page Hero ===== */
.cate-hero {
  position: relative;
  padding-top: clamp(130px, 16vw, 190px);
  padding-bottom: clamp(50px, 6vw, 78px);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.cate-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: .5;
  z-index: -1;
}
.cate-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(105deg, rgba(10, 14, 25, 0.95) 0%, rgba(10, 14, 25, 0.78) 48%, rgba(10, 22, 43, 0.55) 78%);
}
.cate-hero-wave {
  position: absolute;
  left: -20%;
  bottom: 4%;
  width: 80%;
  height: 120px;
  z-index: -1;
  opacity: .5;
  pointer-events: none;
  filter: blur(.2px);
}
.cate-hero-inner { max-width: 780px; position: relative; }
.crumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: #93A5C0;
  margin-bottom: 20px;
}
.crumb a { color: #9DB2CE; }
.crumb a:hover { color: var(--accent); }
.crumb svg { width: 14px; height: 14px; color: #58708F; }
.cate-hero h1 {
  font-size: clamp(34px, 4.6vw, 54px);
  font-weight: 800;
  line-height: 1.18;
  color: #F4F8FF;
  margin-bottom: 18px;
}
.cate-hero h1 span {
  background: linear-gradient(105deg, #6287ff, #2de0c5);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.cate-hero .lead {
  font-size: 17px;
  line-height: 1.85;
  color: #C2D1E6;
  max-width: 650px;
  margin-bottom: 28px;
}
.hero-hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== Category layout ===== */
.category-region {
  padding-top: clamp(50px, 6vw, 70px);
}
.cate-layout {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}
.cate-aside {
  position: sticky;
  top: 92px;
  background: rgba(20, 32, 50, 0.4);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.cate-aside h3 {
  font-size: 16px;
  padding: 0 10px 12px;
  color: #DCE7FB;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}
.cate-aside nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  margin-bottom: 2px;
  font-size: 14px;
  color: var(--text);
  border-radius: 10px;
  transition: background .22s, color .22s, padding-left .22s;
}
.cate-aside nav a svg { width: 15px; height: 15px; color: var(--text-mid); transition: color .2s; }
.cate-aside nav a:hover { background: rgba(61, 125, 235, 0.1); color: #fff; padding-left: 16px; }
.cate-aside nav a:hover svg { color: var(--accent); }
.cate-aside .aside-note {
  margin-top: 16px;
  border-top: 1px solid var(--line);
  padding: 14px 10px 4px;
  font-size: 12px;
  color: #6C84A2;
  line-height: 1.7;
}
.cate-content { min-width: 0; }

.section-pad { padding-block: clamp(40px, 5vw, 64px); }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}
.section-head h2 { font-size: clamp(24px, 2.8vw, 32px); font-weight: 700; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 4px;
  background: var(--accent);
}
.section-caption { color: var(--text-mid); font-size: 15px; max-width: 450px; }

/* ===== Service portal intro ===== */
.service-summary {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
}
.service-main-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--bg-panel);
  border: 1px solid var(--line);
  min-height: 300px;
  display: flex;
  align-items: flex-end;
}
.service-main-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.36;
}
.service-main-card .dark-scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(6, 12, 24, 0.92) 8%, rgba(6, 12, 24, 0.45) 50%, rgba(6,12,24,.15));
}
.service-card-body {
  position: relative;
  z-index: 1;
  padding: clamp(22px, 3vw, 32px);
}
.service-card-tag {
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--signal);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 10px;
}
.service-card-tag span { width: 8px; height: 8px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 8px rgba(255,174,88,.5); }
.service-main-card h3 { font-size: clamp(20px, 2vw, 26px); margin-bottom: 12px; }
.service-main-card p { color: #BCD0E4; font-size: 15px; max-width: 420px; margin-bottom: 14px; }
.service-text-link { color: var(--accent); font-size: 14px; font-weight: 600; }

/* 2-column sub-cards */
.service-mini-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.service-mini-card {
  background: var(--card-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 18px;
  backdrop-filter: blur(10px);
  transition: transform .25s, border-color .25s, background .25s;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 150px;
}
.service-mini-card:hover {
  transform: translateY(-4px);
  border-color: rgba(45, 224, 197, 0.45);
  background: rgba(45, 224, 197, 0.04);
}
.service-mini-card .mini-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--primary);
  background: rgba(61, 125, 235, 0.12);
}
.service-mini-card .mini-icon svg { width: 20px; height: 20px; }
.service-mini-card h4 { font-size: 16px; margin-bottom: 4px; }
.service-mini-card p { font-size: 13px; color: var(--text-mid); flex: 1; }
.corner-link { font-size: 13px; color: var(--accent); }

/* ===== Feature highlights ===== */
.highlight-band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(16, 26, 43, 0.5);
}
.feature-flex {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0px;
}
.feature-cell {
  padding: clamp(24px, 3vw, 40px);
  border-left: 1px solid var(--line);
  transition: background .25s;
}
.feature-cell:first-child { border-left: none; }
.feature-cell:hover { background: rgba(61, 125, 235, 0.05); }
.feature-marker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--signal);
}
.feature-marker svg { width: 17px; height: 17px; }
.feature-cell h3 { font-size: 18px; margin-bottom: 8px; }
.feature-cell p { font-size: 14px; color: var(--text); line-height: 1.8; }

/* ===== scenario cover list ===== */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.scene-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-up);
  border: 1px solid var(--line);
  min-height: 240px;
  display: flex;
  align-items: flex-end;
  transition: transform .3s, border-color .3s, box-shadow .3s;
}
.scene-card:hover { transform: translateY(-5px); border-color: rgba(45,224,197,.5); box-shadow: var(--shadow-hover); }
.scene-visual { position: absolute; inset: 0; }
.scene-visual img { width: 100%; height: 100%; object-fit: cover; opacity: 0.28; transition: transform .5s, opacity .5s; }
.scene-card:hover .scene-visual img { transform: scale(1.04); opacity: .5; }
.scene-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(8,12,24,.94) 20%, rgba(8,12,24,.45) 70%, rgba(8,12,24,.05)); }
.scene-inner { position: relative; z-index: 1; padding: 22px; }
.scene-tag { font-size: 12px; color: var(--accent); display: block; margin-bottom: 8px; letter-spacing: .8px; }
.scene-card h3 { font-size: 19px; margin-bottom: 6px; }
.scene-card p { font-size: 13.5px; opacity: .9; line-height: 1.8; }

/* ===== Steps ===== */
.steps-section {
  background: rgba(16, 26, 43, 0.35);
  border-block: 1px solid var(--line);
}
.steps-wrap {
  counter-reset: step-counter;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.step-card {
  position: relative;
  border-radius: var(--radius-lg);
  background: rgba(21, 33, 53, 0.55);
  border: 1px solid var(--line);
  padding: 24px 20px 22px;
  transition: transform .25s, border-color .25s;
}
.step-card::before {
  counter-increment: step-counter;
  content: "0" counter(step-counter);
  display: block;
  font-size: 24px;
  font-weight: 800;
  font-family: inherit;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--primary);
  margin-bottom: 10px;
  line-height: 1;
}
.step-card:hover { transform: translateY(-4px); border-color: rgba(45,224,197,.4); }
.step-card h3 { font-size: 17px; margin-bottom: 6px; }
.step-card p { font-size: 13.5px; color: var(--text-mid); line-height: 1.8; }

/* ===== Security note ===== */
.security-note {
  display: grid;
  grid-template-columns: 1.1fr 0.65fr;
  gap: 26px;
  align-items: center;
}
.security-note .safety-card {
  background: rgba(255, 174, 88, 0.05);
  border: 1px solid rgba(255, 174, 88, 0.24);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 3vw, 32px);
}
.safety-list { display: grid; gap: 14px; margin-top: 6px; }
.safety-item { display: flex; gap: 14px; align-items: flex-start; }
.safety-badge {
  flex: 0 0 auto;
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: rgba(45,224,197,.1);
  color: var(--accent);
  border: 1px solid rgba(45,224,197,.2);
}
.safety-badge svg { width: 18px; height: 18px; }
.safety-item h4 { font-size: 16px; margin-bottom: 4px; }
.safety-item p { font-size: 13px; color: var(--text-mid); }
.security-note-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 220px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
}
.security-note-visual img { width: 100%; height: 100%; object-fit: cover; opacity: .85; }
.security-note-visual .float-note {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 16px;
  background: rgba(10, 18, 34, 0.7);
  border: 1px solid var(--line);
  backdrop-filter: blur(12px);
  padding: 12px 16px;
  border-radius: 14px;
  font-size: 13px;
  color: #CBD9ED;
}
.float-note strong { color: var(--signal); }

/* ===== FAQ ===== */
.faq-wrap { display: grid; grid-template-columns: repeat(2, 1fr); column-gap: 28px; row-gap: 14px; }
.faq-item {
  background: rgba(18, 30, 48, 0.5);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color .25s;
}
.faq-item:hover { border-color: rgba(45, 224, 197, 0.4); }
.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-strong);
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  padding: 18px 46px 18px 18px;
  cursor: pointer;
  display: flex;
  gap: 12px;
  align-items: center;
  transition: color .2s;
}
.faq-question:hover { color: var(--accent); }
.faq-question::before {
  content: "";
  width: 7px; height: 24px;
  border-radius: 3px;
  background: rgba(61,125,235,.35);
}
.faq-item.open .faq-question { color: var(--accent); }
.faq-item.open .faq-question::before { background: var(--accent); }
.faq-icon {
  position: absolute;
  right: 16px;
  top: 18px;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
}
.faq-icon svg { width: 18px; height: 18px; transition: transform .3s; }
.faq-item.open .faq-icon svg { transform: rotate(45deg); }
.faq-question-wrap { position: relative; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-answer-inner {
  padding: 0 18px 18px 37px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.85;
}
.faq-item.open .faq-answer { max-height: 360px; }

/* ===== CTA ===== */
.final-cta {
  margin-top: clamp(32px, 5vw, 64px);
  background: linear-gradient(120deg, #0c172a 0%, #14253f 52%, #102539 100%);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: clamp(30px, 5vw, 58px);
  position: relative;
  overflow: hidden;
}
.final-cta::before {
  content: "";
  position: absolute;
  width: 440px;
  height: 140px;
  right: -80px;
  bottom: -40px;
  border-radius: 50%;
  background: rgba(45, 224, 197, 0.12);
  filter: blur(44px);
}
.final-cta::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg, transparent, rgba(45,224,197,.35), rgba(61,125,235,.3), transparent);
}
.final-cta h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  max-width: 520px;
  position: relative;
  z-index: 1;
}
.final-cta .cta-text {
  margin-top: 12px;
  font-size: 15px;
  color: var(--text-mid);
  max-width: 600px;
  position: relative;
  z-index: 1;
}
.cta-row { display: flex; align-items: center; gap: 18px; margin-top: 26px; flex-wrap: wrap; position: relative; z-index: 1; }
.muted-note { margin-top: 16px; font-size: 13px; color: #69819e; position: relative; z-index: 1; }

/* ===== Responsive ===== */
@media (max-width: 1120px) {
  .feature-flex, .steps-wrap, .scene-grid { gap: 14px; }
  .feature-cell { padding: 24px 18px; }
}
@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .nav-shell {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 25, 0.98);
    backdrop-filter: blur(22px);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 22px 24px;
    gap: 18px;
    border-bottom: 1px solid var(--line);
    transform: translateY(-130%);
    opacity: 0;
    transition: transform .35s ease, opacity .35s;
    visibility: hidden;
  }
  .nav-shell.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .main-nav { flex-direction: column; align-items: flex-start; gap: 2px; }
  .nav-link { display: block; width: 100%; padding: 11px 0; border-bottom: 1px solid rgba(130,170,255,.08); }
  .nav-link::after { display: none; }
  .header-actions { width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .nav-toggle { z-index: 120; position: relative; }
  .nav-open { color: var(--accent); }
  .header-inner { height: 64px; }
  .cate-layout { grid-template-columns: 1fr; }
  .cate-aside { display: none; }
  .service-summary, .security-note { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
}
@media (max-width: 768px) {
  .section-pad { padding-block: 34px; }
  .feature-flex { grid-template-columns: 1fr; }
  .feature-cell { border-left: none; border-bottom: 1px solid var(--line); padding: 22px 4px; }
  .scene-grid { grid-template-columns: 1fr; }
  .steps-wrap { grid-template-columns: 1fr 1fr; }
  .faq-wrap { grid-template-columns: 1fr; }
  .service-mini-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 16px; }
  .footer-col { margin-top: 10px; }
}
@media (max-width: 520px) {
  .steps-wrap { grid-template-columns: 1fr; }
  .header-actions { grid-template-columns: 1fr; }
  .hero-hero-buttons .btn, .cta-row .btn { width: 100%; }
  .site-header .brand-text { font-size: 16px; }
  .brand-mark { width: 29px; height: 29px; }
  .footer-bottom { flex-direction: column; }
}