/* roulang page: index */
:root{
  --bg-deep:#070C16;
  --bg-panel:#0D1530;
  --bg-elev:#101B3A;
  --signal:#38D5FF;
  --indigo:#4B74FF;
  --amber:#FFC24D;
  --ok:#3CE6AE;
  --text-main:#EAF2FF;
  --text-sub:#A6B6D3;
  --text-weak:#677B98;
  --line:rgba(255,255,255,0.08);
  --glass:rgba(255,255,255,0.04);
  --radius-lg:20px;
  --radius-md:14px;
  --radius-pill:999px;
  --fontStack:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --sidebar-w:248px;
  --sidebar-w-md:220px;
  --shadow-cyan:0 0 28px rgba(47, 212, 255, 0.32);
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg-deep);
  color:var(--text-main);
  font-family:var(--fontStack);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
input,select,textarea{outline:none;}
ul,ol{list-style:none;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-thumb{background:rgba(78,110,160,0.35);border-radius:8px;}
::-webkit-scrollbar-thumb:hover{background:rgba(78,110,160,0.6);}
::selection{background:rgba(56,213,255,0.3);}
.container{max-width:1180px;margin:0 auto;padding:0 28px;}
.section-block{padding:80px 0;border-bottom:1px solid rgba(255,255,255,0.045);}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:40px;
}
.section-head h2{
  font-size:clamp(1.6rem,2.6vw,2.2rem);
  letter-spacing:-0.01em;
  font-weight:800;
  margin-top:8px;
  line-height:1.4;
}
.section-head p{
  color:var(--text-sub);
  max-width:640px;
  margin-top:14px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--signal);
  font-size:13px;
  font-weight:600;
  letter-spacing:0.08em;
  text-transform:uppercase;
  background:rgba(56,213,255,0.08);
  border:1px solid rgba(56,213,255,0.18);
  padding:5px 13px;
  border-radius:var(--radius-pill);
}
.eyebrow::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--signal);
  box-shadow:0 0 12px var(--signal);
}
.section-note{
  color:var(--text-weak);
  font-size:12px;
  margin-top:18px;
  letter-spacing:0.02em;
}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  background:linear-gradient(135deg,#2FD4FF,#4B74FF);
  color:#fff;
  font-weight:600;
  min-height:48px;
  padding:0 26px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,0.12);
  box-shadow:var(--shadow-cyan),inset 0 1px 0 rgba(255,255,255,0.25);
  transition:all 0.28s ease;
  cursor:pointer;
  white-space:nowrap;
}
.btn-primary:hover{
  filter:brightness(1.15);
  transform:translateY(-2px);
  box-shadow:0 0 38px rgba(47,212,255,0.55),inset 0 1px 0 rgba(255,255,255,0.3);
}
.btn-primary:active{transform:translateY(0);filter:brightness(1.04);}
.btn-secondary{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  background:var(--glass);
  backdrop-filter:blur(16px);
  color:var(--text-main);
  border:1px solid rgba(255,255,255,0.14);
  min-height:48px;padding:0 26px;border-radius:12px;
  font-weight:500;
  transition:all 0.25s ease;cursor:pointer;
}
.btn-secondary:hover{
  border-color:rgba(56,213,255,0.55);
  background:rgba(56,213,255,0.08);
  box-shadow:0 0 24px rgba(56,213,255,0.15);
  color:#fff;
}
.btn-secondary:active{transform:translateY(1px);}
.btn-sm{min-height:38px;padding:0 18px;font-size:14px;border-radius:10px;}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--signal);
  outline-offset:3px;
}
.glass-card{
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.085);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-radius:var(--radius-lg);
  transition:border-color .25s ease, background .25s ease;
}
a.glass-card:hover{
  transform:translateY(-4px);
  border-color:rgba(56,213,255,0.45);
}
@keyframes pulseGreen{
  0%{box-shadow:0 0 0 0 rgba(60,230,174,0.55);}
  70%{box-shadow:0 0 0 10px rgba(60,230,174,0);}
  100%{box-shadow:0 0 0 0 rgba(60,230,174,0);}
}
.pulse-dot{
  display:inline-block;width:8px;height:8px;border-radius:50%;
  background:var(--ok);
  animation:pulseGreen 1.8s infinite;
}
.badge-signal{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(56,213,255,0.1);
  border:1px solid rgba(56,213,255,0.25);
  color:#d0f5ff;
  padding:6px 16px;
  border-radius:999px;
  font-size:13px;
  font-weight:500;
}
.glow-orb{
  position:absolute;border-radius:50%;filter:blur(1px);pointer-events:none;z-index:0;
}
/* ===== App Shell ===== */
.app-sidebar{
  position:fixed;top:0;left:0;z-index:100;
  width:var(--sidebar-w);height:100vh;
  display:flex;flex-direction:column;
  background:rgba(9,16,30,0.88);
  backdrop-filter:blur(22px);
  border-right:1px solid rgba(255,255,255,0.06);
  padding:26px 18px 22px;
}
.app-sidebar-inner{display:flex;flex-direction:column;height:100%;}
.sidebar-brand{
  display:flex;align-items:center;gap:12px;
  padding:4px 4px 26px;
  border-bottom:1px solid rgba(255,255,255,0.06);
  margin-bottom:18px;
}
.logo-mark{
  position:relative;
  width:42px;height:42px;border-radius:14px;
  background:linear-gradient(145deg,rgba(56,213,255,0.18),rgba(46,93,255,0.14));
  border:1px solid rgba(56,213,255,0.42);
  display:grid;place-items:center;
  flex:none;
  box-shadow:0 0 24px rgba(56,213,255,0.12),inset 0 1px 0 rgba(255,255,255,0.18);
}
.logo-mark::before{
  content:"j9";
  font-weight:800;font-size:14px;color:var(--signal);
  letter-spacing:-0.03em;
  text-shadow:0 0 12px rgba(56,213,255,0.6);
}
.logo-mark::after{
  content:"";position:absolute;inset:-5px;border-radius:18px;
  border:1px dashed rgba(56,213,255,0.22);
}
.brand-name{
  font-weight:800;line-height:1.2;
  letter-spacing:0.01em;
  display:flex;flex-direction:column;gap:2px;
}
.brand-name strong{
  font-size:18px;color:#fff;
}
.brand-name span{
  font-size:13px;color:var(--text-sub);
  font-weight:500;letter-spacing:0.03em;
}
.side-nav{display:flex;flex-direction:column;gap:6px;}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:14px;
  padding:12px 14px;
  border-radius:12px;
  color:var(--text-sub);
  font-weight:500;
  transition:all 0.2s ease;
  border:1px solid transparent;
  font-size:15px;
}
.nav-item svg{width:19px;height:19px;flex:none;color:var(--text-weak);transition:color .2s ease;}
.nav-item:hover{
  background:rgba(56,213,255,0.07);
  color:#fff;
  border-color:rgba(56,213,255,0.12);
}
.nav-item:hover svg{color:var(--signal);}
.nav-item.active{
  background:linear-gradient(90deg,rgba(56,213,255,0.13),rgba(75,116,255,0.05));
  color:#fff;
  border-color:rgba(56,213,255,0.18);
}
.nav-item.active::before{
  content:"";position:absolute;left:-1px;top:20%;
  height:60%;width:2px;
  background:var(--signal);
  box-shadow:0 0 16px rgba(56,213,255,0.8);
  border-radius:4px;
}
.nav-item.active svg{color:var(--signal);}
.sidebar-status{
  margin-top:auto;
  background:rgba(255,255,255,0.035);
  border:1px solid rgba(255,255,255,0.08);
  border-radius:16px;
  padding:14px 14px;
  display:flex;align-items:flex-start;gap:10px;
}
.sidebar-status .dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--ok);
  flex:none;margin-top:7px;
  animation:pulseGreen 1.8s infinite;
}
.sidebar-status span{
  color:var(--text-sub);font-size:12px;line-height:1.6;
}
.sidebar-status span strong{
  display:block;color:var(--text-main);font-weight:600;font-size:13px;
  margin-bottom:3px;
}
.sidebar-cta{margin-top:14px;}
.app-main{
  margin-left:var(--sidebar-w);
  min-height:100vh;
  position:relative;
  z-index:1;
}
/* ===== Mobile Topbar ===== */
.mobile-topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;z-index:200;
  height:60px;
  background:rgba(7,12,22,0.82);
  backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(255,255,255,0.07);
  padding:0 18px;
  align-items:center;justify-content:space-between;
}
.mobile-topbar .logo-mark{width:36px;height:36px;border-radius:12px;}
.mobile-topbar .brand-name strong{font-size:15px;}
.mobile-topbar .brand-name span{font-size:11px;}
.hamburger-btn{
  width:42px;height:42px;border-radius:10px;
  background:rgba(56,213,255,0.07);
  border:1px solid rgba(56,213,255,0.16);
  display:flex;flex-direction:column;gap:5px;
  align-items:center;justify-content:center;
  cursor:pointer;
  transition:border-color .2s ease, background .2s ease;
}
.hamburger-btn span{display:block;width:18px;height:2px;background:var(--signal);border-radius:4px;}
.hamburger-btn:hover{background:rgba(56,213,255,0.15);}
/* ===== Drawer ===== */
.mobile-drawer{
  position:fixed;top:0;left:0;z-index:400;
  width:320px;max-width:88vw;height:100vh;
  background:rgba(8,13,25,0.96);
  backdrop-filter:blur(24px);
  border-right:1px solid rgba(56,213,255,0.12);
  transform:translateX(-105%);
  transition:transform .32s cubic-bezier(.22,.61,.36,1);
  padding:22px 20px;
  display:flex;flex-direction:column;
}
.mobile-drawer.open{transform:translateX(0);}
.drawer-overlay{
  position:fixed;inset:0;z-index:360;
  background:rgba(3,6,12,0.62);
  backdrop-filter:blur(4px);
  opacity:0;pointer-events:none;
  transition:opacity .28s ease;
}
.drawer-overlay.open{opacity:1;pointer-events:auto;}
.drawer-close{
  position:absolute;top:20px;right:18px;
  width:36px;height:36px;border-radius:10px;
  background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.1);
  display:grid;place-items:center;
  cursor:pointer;
  color:var(--text-sub);
  font-size:18px;line-height:1;
}
.drawer-close:hover{color:#fff;border-color:rgba(56,213,255,0.4);}
/* ===== Hero ===== */
.hero{
  position:relative;
  min-height:78vh;
  display:flex;
  align-items:center;
  padding:96px 0 60px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center 35%;
  opacity:.26;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(rgba(255,255,255,0.5) 1px, transparent 1px) 0 0/28px 28px,
    linear-gradient(180deg,rgba(7,12,22,0.82) 0%,rgba(7,12,22,0.62) 45%,#070C16 100%);
  opacity:.78;
}
.hero-orb{
  position:absolute;z-index:0;border-radius:50%;
  filter:blur(8px);pointer-events:none;
}
.hero-orb.orb-cyan{
  width:360px;height:360px;top:-140px;left:-80px;
  background:radial-gradient(circle,rgba(56,213,255,0.14),transparent 65%);
}
.hero-orb.orb-indigo{
  width:480px;height:480px;bottom:-220px;right:-80px;
  background:radial-gradient(circle,rgba(75,116,255,0.16),transparent 65%);
}
.hero-inner{
  position:relative;z-index:2;
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(330px,0.85fr);
  gap:52px;
  align-items:center;
}
.hero-kicker{
  display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px;
  align-items:center;
}
.hero h1{
  font-size:clamp(2.1rem,4vw,3.4rem);
  line-height:1.22;
  font-weight:800;
  letter-spacing:-0.01em;
  margin-bottom:22px;
}
.hero h1 .brand-tail{
  display:block;
  background:linear-gradient(90deg,#2FD4FF,#4B74FF);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  font-weight:800;
}
.hero-sub{
  color:var(--text-sub);
  font-size:16px;
  max-width:560px;
  line-height:1.85;
  margin-bottom:28px;
}
.hero-tags{
  display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;
}
.hero-tags span{
  display:inline-flex;align-items:center;gap:7px;
  font-size:12px;
  border:1px solid rgba(255,255,255,0.1);
  background:rgba(255,255,255,0.04);
  padding:5px 13px;
  border-radius:999px;
  color:var(--text-sub);
}
.hero-tags i{
  width:6px;height:6px;border-radius:50%;
  background:var(--signal);
  box-shadow:0 0 8px var(--signal);
}
.hero-actions{
  display:flex;flex-wrap:wrap;gap:14px;
}
.hero-visual{
  position:relative;
  display:flex;align-items:center;justify-content:center;
  min-height:420px;
}
.radar-ring{
  position:relative;
  width:min(380px,100%);aspect-ratio:1;
  border-radius:50%;
  border:1px solid rgba(56,213,255,0.12);
}
.radar-ring::before,.radar-ring::after{
  content:"";position:absolute;border-radius:50%;
}
.radar-ring::before{
  inset:17%;border:1px dashed rgba(56,213,255,0.22);
  animation:spin 24s linear infinite;
}
.radar-ring::after{
  inset:35%;background:radial-gradient(circle,rgba(56,213,255,0.08),transparent 70%);
  border:1px solid rgba(56,213,255,0.15);
}
.radar-core{
  position:absolute;inset:50%;
  transform:translate(-50%,-50%);
  width:70px;height:70px;
  background:radial-gradient(closest-side,rgba(56,213,255,0.22),rgba(12,20,42,0.9));
  border-radius:50%;
  border:1px solid rgba(56,213,255,0.4);
  display:grid;place-items:center;
  color:var(--signal);
  font-weight:800;
  font-size:12px;
  letter-spacing:0.08em;
  box-shadow:0 0 40px rgba(56,213,255,0.2);
}
.radar-dot{
  position:absolute;width:8px;height:8px;border-radius:50%;
  background:var(--signal);
  box-shadow:0 0 12px var(--signal);
}
.radar-dot.d1{top:24%;right:32%;}
.radar-dot.d2{bottom:19%;left:48%;width:6px;height:6px;background:var(--ok);box-shadow:0 0 12px var(--ok);}
.radar-dot.d3{top:37%;left:18%;width:5px;height:5px;background:var(--amber);box-shadow:0 0 9px var(--amber);}
.radar-sweep{
  position:absolute;inset:0;border-radius:50%;
  background:conic-gradient(from 0deg,rgba(56,213,255,0.16),transparent 18%,transparent 100%);
  animation:spin 5s linear infinite;
}
.hero-visual-card{
  position:absolute;
  background:rgba(8,16,32,0.78);
  backdrop-filter:blur(14px);
  border:1px solid rgba(56,213,255,0.16);
  border-radius:14px;
  padding:10px 14px;
  font-size:12px;
  color:var(--text-sub);
  box-shadow:0 12px 30px rgba(0,0,0,0.25);
  display:flex;align-items:center;gap:8px;
}
.hero-visual-card .ts{color:var(--text-weak);font-size:11px;}
.hero-visual-card strong{color:var(--signal);font-weight:600;font-size:12px;}
.hvc1{top:7%;left:1%;}
.hvc2{bottom:9%;right:-1%;}
.hvc1::before,.hvc2::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--ok);}
@keyframes spin{
  from{transform:rotate(0deg);}
  to{transform:rotate(360deg);}
}
/* ===== Metrics ===== */
.metrics-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:22px;
}
.metric-card{
  background:var(--glass);
  border:1px solid rgba(255,255,255,0.085);
  backdrop-filter:blur(18px);
  border-radius:20px;
  padding:26px 26px;
  position:relative;
  overflow:hidden;
  transition:all .25s ease;
}
.metric-card:hover{
  transform:translateY(-3px);
  border-color:rgba(56,213,255,0.32);
}
.metric-card .metric-ic{
  width:34px;height:34px;border-radius:9px;
  background:rgba(56,213,255,0.1);
  border:1px solid rgba(56,213,255,0.14);
  display:grid;place-items:center;
  color:var(--signal);
  margin-bottom:14px;
}
.metric-card .metric-label{
  color:var(--text-sub);font-size:13px;
  display:block;margin-bottom:5px;
}
.metric-card .metric-value{
  font-size:30px;
  font-weight:800;
  letter-spacing:-0.02em;
  color:#fff;
  font-variant-numeric:tabular-nums;
  display:block;
}
.metric-card .metric-sub{
  color:var(--text-weak);font-size:13px;
  display:block;
  margin-top:7px;
}
.metric-card .metric-ago{
  color:var(--signal);
  font-weight:600;
}
.metric-main{grid-column:span 7}
.metric-time{grid-column:span 5}
.metric-min{grid-column:span 4}
.status-dot-icon{
  position:absolute;top:22px;right:22px;
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;
  color:var(--ok);
}
.status-dot-icon::before{
  content:"";width:8px;height:8px;border-radius:50%;
  background:var(--ok);
  animation:pulseGreen 1.8s infinite;
}
@media(max-width:1024px){
  .metric-main,.metric-time,.metric-min{grid-column:span 6;}
}
@media(max-width:600px){
  .metric-main,.metric-time,.metric-min{grid-column:span 12;}
}
/* ===== Services ===== */
.svc-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:22px;
}
.svc-card{
  background:rgba(255,255,255,0.035);
  border:1px solid rgba(255,255,255,0.08);
  border-radius:20px;
  overflow:hidden;
  display:flex;
  backdrop-filter:blur(16px);
  transition:all .25s ease;
}
.svc-card:hover{
  transform:translateY(-5px);
  border-color:rgba(56,213,255,0.42);
}
.svc-card--7{grid-column:span 7;}
.svc-card--5{grid-column:span 5;}
.svc-card--7 svc-flex{flex-direction:row;}
.svc-thumb{
  flex:none;
  overflow:hidden;
}
.svc-thumb img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .45s cubic-bezier(.2,.7,.3,1);
}
.svc-card:hover .svc-thumb img{transform:scale(1.04);}
.svc-wide .svc-thumb{width:42%;min-height:225px;}
.svc-narrow{flex-direction:column;}
.svc-narrow .svc-thumb{width:100%;height:155px;}
.svc-body{padding:24px 24px;display:flex;flex-direction:column;flex:1;}
.svc-tag{
  display:inline-block;
  align-self:flex-start;
  background:rgba(56,213,255,0.09);
  border:1px solid rgba(56,213,255,0.18);
  color:var(--signal);
  font-size:12px;font-weight:600;
  border-radius:999px;
  padding:4px 13px;
  margin-bottom:14px;
  letter-spacing:0.04em;
}
.svc-body h3{
  font-size:20px;
  font-weight:700;
  margin-bottom:10px;
  letter-spacing:-0.01em;
}
.svc-body p{
  color:var(--text-sub);
  font-size:14px;
  line-height:1.8;
  margin-bottom:18px;
  display:-webkit-box;
  -webkit-line-clamp:4;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.svc-more{
  margin-top:auto;
  display:inline-flex;align-items:center;gap:8px;
  color:var(--signal);
  font-size:14px;
  font-weight:600;
  transition:gap .2s ease;
}
.svc-more:hover{gap:13px;}
@media(max-width:1024px){
  .svc-card--7,.svc-card--5{grid-column:span 12;}
}
@media(max-width:640px){
  .svc-wide{flex-direction:column;}
  .svc-wide .svc-thumb{width:100%;height:170px;min-height:auto;}
}
/* ===== Latest / Posts ===== */
.latest-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:22px;
}
.latest-list{grid-column:span 8;}
.latest-aside{grid-column:span 4;}
.post-item{
  display:flex;
  gap:18px;
  padding:24px 22px;
  border-radius:18px;
  background:rgba(255,255,255,0.035);
  border:1px solid rgba(255,255,255,0.075);
  backdrop-filter:blur(12px);
  margin-bottom:16px;
  transition:all .22s ease;
}
.post-item:hover{
  background:rgba(56,213,255,0.05);
  border-color:rgba(56,213,255,0.3);
  transform:translateX(4px);
}
.post-index{
  flex:none;
  color:var(--text-weak);
  font-size:12px;
  font-weight:600;
  width:26px;
  height:26px;
  border:1px solid rgba(255,255,255,0.1);
  border-radius:8px;
  display:flex;align-items:center;justify-content:center;
}
.post-main{flex:1;min-width:0;}
.post-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:7px;}
.post-cat{
  display:inline-block;
  background:rgba(75,116,255,0.14);
  border:1px solid rgba(75,116,255,0.2);
  color:#b9c9ff;
  font-size:11px;
  border-radius:999px;
  padding:2px 10px;
  letter-spacing:0.03em;
}
.post-meta time{color:var(--text-weak);font-size:12px;}
.post-main h3{
  font-size:17px;
  line-height:1.55;
  font-weight:650;
  margin-bottom:5px;
}
.post-main h3 a{color:var(--text-main);transition:color .18s ease;}
.post-main h3 a:hover{color:var(--signal);}
.post-main p{
  color:var(--text-sub);font-size:14px;
  line-height:1.8;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:9px;
}
.post-more{
  font-size:13px;color:var(--signal);
  display:inline-flex;align-items:center;gap:6px;
}
.post-more:hover{gap:10px;}
.list-empty{
  background:rgba(255,255,255,0.03);
  border:1px dashed rgba(255,255,255,0.09);
  border-radius:18px;
  padding:56px 20px;
  text-align:center;
  color:var(--text-weak);
}
.list-empty svg{width:42px;height:42px;opacity:.4;margin:0 auto 12px;}
.aside-panel{
  background:rgba(255,255,255,0.035);
  border:1px solid rgba(255,255,255,0.08);
  border-radius:18px;
  padding:22px 20px;
  margin-bottom:16px;
}
.aside-panel h3{
  font-size:16px;
  font-weight:700;
  margin-bottom:16px;
}
.aside-list li a{
  display:flex;align-items:center;justify-content:space-between;
  padding:9px 0;
  border-bottom:1px dashed rgba(255,255,255,0.06);
  color:var(--text-sub);
  font-size:14px;
  transition:color .18s ease,padding-left .18s ease;
}
.aside-list li a:hover{color:var(--signal);padding-left:6px;}
.aside-list li:last-child a{border-bottom:none;}
.aside-list i{
  width:7px;height:7px;border-radius:2px;
  background:rgba(56,213,255,0.45);
  flex:none;
}
.aside-note{
  background:rgba(255,255,255,0.03);
  border:1px solid rgba(255,255,255,0.07);
  border-radius:18px;
  padding:20px;
}
.aside-note .note-title{
  display:flex;align-items:center;gap:10px;
  color:var(--text-main);font-weight:600;font-size:15px;
  margin-bottom:7px;
}
.aside-note .note-title::before{
  content:"";width:8px;height:8px;border-radius:50%;
  background:var(--amber);
  box-shadow:0 0 12px rgba(255,194,77,0.4);
}
.aside-note p{color:var(--text-weak);font-size:13px;}
@media(max-width:1024px){
  .latest-list,.latest-aside{grid-column:span 12;}
}
/* ===== Compare ===== */
.compare-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:26px;
}
.compare-card{
  border-radius:22px;
  padding:30px 28px;
  background:rgba(255,255,255,0.03);
  border:1px solid rgba(255,255,255,0.08);
  position:relative;
}
.compare-card--signal{
  background:linear-gradient(145deg,rgba(56,213,255,0.08),rgba(75,116,255,0.04));
  border-color:rgba(56,213,255,0.22);
}
.compare-card .compare-label{
  display:inline-block;
  font-size:12px;color:var(--text-weak);
  letter-spacing:0.06em;
  margin-bottom:8px;
  padding:4px 12px;
  border:1px solid rgba(255,255,255,0.08);
  border-radius:999px;
}
.compare-card--signal .compare-label{
  color:var(--signal);
  border-color:rgba(56,213,255,0.2);
  background:rgba(56,213,255,0.08);
}
.compare-card h3{
  margin-bottom:16px;
  color:var(--text-main);
  font-weight:700;
  font-size:17px;
}
.route-step{
  display:flex;align-items:flex-start;gap:14px;
  padding:12px 0;
  padding-left:4px;
  color:var(--text-sub);
  font-size:14px;
  position:relative;
}
.route-step:not(:last-child)::before{
  content:"";position:absolute;
  left:17px;top:37px;bottom:-12px;width:1px;
  background:rgba(255,255,255,0.08);
}
.compare-card--signal .route-step:not(:last-child)::before{
  background:rgba(56,213,255,0.34);
  box-shadow:0 0 8px rgba(56,213,255,0.15);
}
.route-dot{
  width:28px;height:28px;border-radius:50%;
  background:rgba(255,255,255,0.05);
  border:1px solid rgba(255,255,255,0.12);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-weak);
  font-size:11px;
  font-weight:700;
  flex:none;
}
.compare-card--signal .route-dot{
  background:rgba(56,213,255,0.12);
  border-color:var(--signal);
  color:var(--signal);
  box-shadow:0 0 12px rgba(56,213,255,0.15);
}
.compare-comment{
  color:var(--text-weak);font-size:12px;
  margin-top:20px;
  padding-top:14px;
  border-top:1px dashed rgba(255,255,255,0.08);
}
.compare-card--signal .compare-comment{color:var(--text-sub);}
@media(max-width:800px){
  .compare-grid{grid-template-columns:1fr;}
}
/* ===== FAQ ===== */
.faq-wrap{max-width:920px;}
.faq-item{
  background:rgba(255,255,255,0.035);
  border:1px solid rgba(255,255,255,0.08);
  border-radius:18px;
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .22s ease, background .22s ease;
}
.faq-item[open]{
  border-color:rgba(56,213,255,0.24);
  background:rgba(56,213,255,0.035);
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  cursor:pointer;
  padding:20px 22px;
  font-weight:600;
  font-size:16px;
  color:var(--text-main);
  list-style:none;
  border-radius:18px;
  transition:color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--signal);}
.faq-item .faq-icon{
  width:28px;height:28px;flex:none;border-radius:50%;
  border:1px solid rgba(255,255,255,0.13);
  background:rgba(255,255,255,0.03);
  display:grid;place-items:center;
  font-size:16px;
  color:var(--text-sub);
  transition:all .22s ease;
}
.faq-item[open] .faq-icon{
  transform:rotate(45deg);
  border-color:rgba(56,213,255,0.4);
  color:var(--signal);
}
.faq-body{
  padding:0 22px 22px;
  color:var(--text-sub);
  font-size:15px;
  line-height:1.9;
  border-top:1px solid rgba(255,255,255,0.05);
  padding-top:16px;
  margin-top:2px;
}
.faq-body p{margin-bottom:8px;}
.faq-body a{color:var(--signal);}
/* ===== CTA Form ===== */
.cta-section{padding:76px 0;position:relative;}
.cta-card{
  background:
    radial-gradient(circle at 8% 15%,rgba(56,213,255,0.10),transparent 40%),
    radial-gradient(circle at 92% 88%,rgba(75,116,255,0.12),transparent 40%),
    rgba(255,255,255,0.04);
  border:1px solid rgba(56,213,255,0.18);
  border-radius:24px;
  padding:52px;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(320px,0.85fr);
  gap:42px;
  align-items:center;
  backdrop-filter:blur(20px);
}
.cta-card h2{
  font-size:clamp(1.6rem,2.6vw,2.2rem);
  font-weight:800;
  letter-spacing:-0.01em;
  margin-bottom:16px;
  color:#fff;
}
.cta-card .cta-text p{color:var(--text-sub);font-size:15px;line-height:1.85;}
.cta-form .form-field{margin-bottom:14px;}
.cta-form label{
  display:block;font-size:13px;color:var(--text-sub);
  margin-bottom:8px;font-weight:500;
}
.cta-form input,.cta-form select{
  width:100%;
  background:rgba(7,14,27,0.85);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:12px;
  padding:13px 16px;
  font-size:15px;
  color:#fff;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.cta-form input::placeholder{color:var(--text-weak);}
.cta-form input:focus,.cta-form select:focus{
  border-color:rgba(56,213,255,0.45);
  box-shadow:0 0 0 3px rgba(56,213,255,0.1);
}
.cta-form select option{background:#0D1530;color:#fff;}
.field-error{color:#ff6b7b;font-size:12px;margin-top:6px;display:none;}
.field-error.show{display:block;}
.form-success{
  background:rgba(60,230,174,0.1);
  border:1px solid rgba(60,230,174,0.2);
  border-radius:16px;
  padding:28px;
  color:#c9fbea;
  display:none;
  text-align:center;
}
.form-success.show{display:block;}
.form-success .ok-ic{
  width:44px;height:44px;border-radius:50%;
  background:rgba(60,230,174,0.12);
  border:1px solid rgba(60,230,174,0.2);
  color:var(--ok);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 12px;
  font-size:20px;
}
@media(max-width:960px){
  .cta-card{grid-template-columns:1fr;padding:32px 24px;}
}
/* ===== Footer ===== */
.site-footer{
  border-top:1px solid rgba(255,255,255,0.06);
  padding:52px 0 40px;
  background:linear-gradient(180deg,transparent,rgba(6,10,20,0.6));
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr;
  gap:34px;
  padding-bottom:28px;
}
.footer-brand .brand-name{margin-top:10px;}
.footer-brand p{
  color:var(--text-weak);
  font-size:13px;
  max-width:280px;
  margin-top:14px;
  line-height:1.8;
}
.footer-links h4{
  font-size:15px;
  font-weight:700;
  margin-bottom:14px;
  color:#fff;
}
.footer-links a{
  display:block;
  padding:5px 0;
  color:var(--text-sub);
  font-size:14px;
  transition:color .2s ease,padding-left .2s ease;
}
.footer-links a:hover{color:var(--signal);padding-left:6px;}
.footer-bottom{
  border-top:1px dashed rgba(255,255,255,0.06);
  padding-top:22px;
  display:flex;
  justify-content:space-between;
  gap:18px;
  color:var(--text-weak);
  font-size:13px;
  flex-wrap:wrap;
}
.footer-bottom p{margin:0;}
.footer-bottom p:last-child span{color:var(--text-weak);}
@media(max-width:768px){
  .footer-grid{grid-template-columns:1fr;}
}
/* ===== Floating status bar ===== */
.mobile-status-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  position:fixed;
  bottom:14px;left:14px;right:14px;
  z-index:300;
  background:rgba(8,15,29,0.82);
  backdrop-filter:blur(18px);
  border:1px solid rgba(56,213,255,0.16);
  border-radius:16px;
  padding:12px 16px;
  box-shadow:0 18px 40px rgba(0,0,0,0.45);
  transition:transform .35s ease;
}
.mobile-status-bar.hide{transform:translateY(120%);}
.mobile-status-bar .ms-text{
  display:flex;align-items:center;gap:10px;
  color:var(--text-sub);font-size:13px;
}
.mobile-status-bar .ms-text i{
  width:6px;height:6px;border-radius:50%;
  background:var(--ok);
}
.mobile-status-bar .ms-close{
  width:28px;height:28px;border-radius:8px;
  background:rgba(255,255,255,0.05);
  border:1px solid rgba(255,255,255,0.1);
  display:grid;place-items:center;
  cursor:pointer;
  color:var(--text-weak);
  font-size:14px;
}
.mobile-status-bar .ms-close:hover{color:#fff;}
@media(min-width:1024px){
  .mobile-status-bar{display:none;}
}
/* ===== Tablet & mobile ===== */
@media(max-width:1279px){
  .app-sidebar{width:var(--sidebar-w-md);}
  .app-main{margin-left:var(--sidebar-w-md);}
  .section-block{padding:70px 0;}
}
@media(max-width:1023px){
  .app-sidebar{display:none;}
  .app-main{margin-left:0;padding-top:60px;}
  .mobile-topbar{display:flex;}
  .hero{padding:70px 0 50px;min-height:auto;}
  .hero-inner{grid-template-columns:1fr;gap:34px;}
  .hero-visual{min-height:320px;}
  .section-head{flex-direction:column;align-items:flex-start;}
}
@media(max-width:640px){
  .container{padding:0 18px;}
  .section-block{padding:50px 0;}
  .hero h1{font-size:2rem;}
  .hero-tags span{font-size:11px;}
  .hero-actions .btn-primary,.hero-actions .btn-secondary{width:100%;}
  .metric-card{padding:20px 20px;}
  .metric-card .metric-value{font-size:24px;}
  .metric-card .status-dot-icon{top:18px;right:18px;}
  .svc-body p{-webkit-line-clamp:3;}
  .faq-item summary{font-size:15px;padding:16px 16px;}
  .faq-body{padding:0 16px 16px;}
  .cta-card{padding:26px 20px;}
  .post-item{padding:18px 16px;gap:12px;}
  .post-main p{-webkit-line-clamp:1;}
  .compare-card{padding:24px 20px;}
  .footer-bottom{flex-direction:column;gap:6px;}
}

/* roulang page: article */
:root {
    --bg-deep: #070C16;
    --panel: #0D1530;
    --panel-soft: #111B38;
    --cyan: #38D5FF;
    --indigo: #4B74FF;
    --amber: #FFC24D;
    --green: #3CE6AE;
    --text-main: #EAF2FF;
    --text-body: #D4E0F2;
    --text-muted: #A6B6D3;
    --text-weak: #677B98;
    --stroke: rgba(255, 255, 255, .08);
    --glass: rgba(255, 255, 255, .04);
    --glow-cyan: rgba(47, 212, 255, .45);
    --radius-xl: 20px;
    --radius-md: 12px;
    --radius-pill: 999px;
    --sat: env(safe-area-inset-top);
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    min-height: 100vh;
    background:
      radial-gradient(900px 520px at 88% -10%, rgba(75, 116, 255, .14), transparent 60%),
      radial-gradient(720px 440px at -10% 18%, rgba(56, 213, 255, .07), transparent 55%),
      radial-gradient(900px 680px at 80% 110%, rgba(255, 194, 77, .045), transparent 55%),
      var(--bg-deep);
    color: var(--text-main);
    font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

  body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px);
    background-size: 26px 26px;
    opacity: .35;
    pointer-events: none;
    z-index: 0;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

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

  button,
  input,
  select,
  textarea {
    font: inherit;
  }

  h1, h2, h3, h4, h5 {
    margin: 0;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.01em;
  }

  p {
    margin: 0;
  }

  ul, ol {
    margin: 0;
    padding: 0;
  }

  .container-xl {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding-left: 28px;
    padding-right: 28px;
  }

  ::selection {
    background: rgba(56, 213, 255, .22);
    color: #fff;
  }

  /* 桌面左侧 App Shell */
  .sidebar-area {
    position: fixed;
    z-index: 80;
    top: 0;
    bottom: 0;
    left: 0;
    width: 248px;
    display: flex;
    flex-direction: column;
    padding: 24px 18px 26px;
    background: rgba(8, 13, 27, .84);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    border-right: 1px solid var(--stroke);
    transition: transform .32s ease, box-shadow .32s ease;
  }

  .brand-block {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 8px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, .05);
  }

  .logo-mark {
    position: relative;
    display: block;
    width: 46px;
    height: 46px;
    flex: 0 0 46px;
    border-radius: 14px;
    background: linear-gradient(145deg, rgba(47, 212, 255, .2), rgba(75, 116, 255, .12));
    border: 1px solid rgba(56, 213, 255, .4);
    box-shadow: 0 0 22px rgba(56, 213, 255, .12), inset 0 0 12px rgba(56, 213, 255, .08);
    font-weight: 700;
  }

  .logo-mark::before,
  .logo-mark::after {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    height: 4px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--cyan), var(--indigo));
    opacity: .9;
  }

  .logo-mark::before {
    top: 13px;
  }

  .logo-mark::after {
    bottom: 13px;
    width: 16px;
    left: 16px;
    background: var(--amber);
  }

  .brand-name {
    display: flex;
    flex-direction: column;
    gap: 2px;
    line-height: 1.2;
  }

  .brand-name strong {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0.02em;
    color: #fff;
  }

  .brand-name span {
    font-size: 13px;
    letter-spacing: .14em;
    color: var(--text-weak);
    white-space: nowrap;
  }

  .mobile-topbar {
    display: none;
  }

  .side-nav {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 8px;
    margin-top: 28px;
  }

  .nav-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 46px;
    padding: 11px 14px;
    border-radius: 14px;
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 500;
    transition: color .22s ease, background .22s ease, transform .22s ease;
  }

  .nav-item svg {
    width: 20px;
    height: 20px;
    color: currentColor;
    opacity: .9;
    transition: opacity .2s ease, transform .2s ease;
  }

  .nav-item:hover {
    background: rgba(255, 255, 255, .05);
    color: #fff;
    transform: translateX(2px);
  }

  .nav-item:focus-visible,
  .btn:focus-visible,
  .mobile-menu-btn:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
  }

  .nav-item.active {
    background: rgba(56, 213, 255, .1);
    color: var(--cyan);
    font-weight: 600;
  }

  .nav-item.active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    bottom: 9px;
    width: 3px;
    border-radius: 6px;
    background: var(--cyan);
    box-shadow: 0 0 16px rgba(56, 213, 255, .6);
  }

  .nav-item.active:hover {
    transform: none;
    background: rgba(56, 213, 255, .14);
  }

  .side-status {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 13px 12px;
    margin-top: 14px;
    border: 1px solid var(--stroke);
    border-radius: 14px;
    background: rgba(255, 255, 255, .025);
    font-size: 13px;
    color: var(--text-weak);
    line-height: 1.6;
  }

  .pulse-dot {
    width: 8px;
    height: 8px;
    flex: 0 0 8px;
    margin-top: 7px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 12px rgba(60, 230, 174, .7);
    animation: pulse 2.2s ease-in-out infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: .6; transform: scale(.95); }
    50% { opacity: 1; transform: scale(1.08); }
  }

  .btn-primary {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    border: 0;
    border-radius: 12px;
    background: linear-gradient(135deg, #2FD4FF, #4B74FF);
    color: #fff;
    font-weight: 600;
    font-size: 15px;
    line-height: 1;
    cursor: pointer;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .08), 0 0 28px rgba(47, 212, 255, .28);
    transition: transform .2s ease, filter .2s ease, box-shadow .2s ease;
  }

  .btn-primary:hover {
    filter: brightness(1.15);
    transform: translateY(-2px);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .12), 0 0 34px rgba(56, 213, 255, .4);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 0 18px rgba(56, 213, 255, .24);
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: 12px;
    border: 1px solid var(--stroke);
    background: rgba(255, 255, 255, .04);
    color: var(--text-main);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: border-color .2s, color .2s, background .2s, box-shadow .2s;
  }

  .btn-secondary:hover {
    border-color: rgba(56, 213, 255, .6);
    color: var(--cyan);
    background: rgba(56, 213, 255, .06);
    box-shadow: 0 0 18px rgba(56, 213, 255, .08);
  }

  .side-cta {
    display: block;
    width: 100%;
    text-align: center;
    margin-top: 18px;
  }

  .main-shell {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    margin-left: 248px;
  }

  /* 抽屉遮罩 */
  .drawer-scrim {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 75;
    background: rgba(3, 6, 14, .56);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .28s ease;
  }

  /* 文章头图 */
  .article-hero {
    position: relative;
    overflow: hidden;
    padding: 68px 0 54px;
    border-bottom: 1px solid var(--stroke);
    background:
      linear-gradient(180deg, rgba(5, 10, 22, .76), rgba(9, 15, 32, .66)),
      linear-gradient(120deg, rgba(56, 213, 255, .08), rgba(75, 116, 255, .04)),
      url("/assets/images/backpic/back-2.webp") center 20% / cover no-repeat;
  }

  .article-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(600px 300px at 18% 16%, rgba(56, 213, 255, .1), transparent 66%);
    pointer-events: none;
  }

  .article-hero .hero-inner {
    position: relative;
    z-index: 2;
  }

  .crumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 9px;
    margin-bottom: 28px;
    color: var(--text-weak);
    font-size: 14px;
  }

  .crumbs a {
    transition: color .2s;
  }

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

  .crumb-sep {
    color: rgba(255, 255, 255, .25);
    font-size: 13px;
  }

  .crumb-current {
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 420px;
  }

  .article-page-title {
    max-width: 960px;
    font-size: clamp(30px, 4vw, 46px);
    font-weight: 800;
    line-height: 1.22;
    letter-spacing: -0.01em;
    color: #fff;
    text-wrap: balance;
  }

  .article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 20px;
    margin-top: 22px;
    color: var(--text-muted);
    font-size: 14px;
  }

  .meta-item {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    letter-spacing: 0.02em;
  }

  .meta-item svg {
    width: 16px;
    height: 16px;
    opacity: .8;
  }

  .meta-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(255, 194, 77, .1);
    border: 1px solid rgba(255, 194, 77, .24);
    color: var(--amber);
    font-size: 13px;
    line-height: 1.5;
  }

  /* 空文章态 */
  .empty-state {
    max-width: 820px;
    margin: 0 auto;
    padding: 70px 0 90px;
  }

  .empty-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 56px 32px;
    border: 1px solid var(--stroke);
    border-radius: 20px;
    background: rgba(255, 255, 255, .035);
    text-align: center;
    backdrop-filter: blur(14px);
  }

  .empty-panel .empty-icon {
    width: 56px;
    height: 56px;
    color: rgba(255, 255, 255, .2);
    margin-bottom: 6px;
  }

  .empty-panel h2 {
    font-size: 22px;
    font-weight: 700;
  }

  .empty-panel p {
    max-width: 420px;
    color: var(--text-weak);
    font-size: 14px;
  }

  /* 正文容器 */
  .article-body-section {
    width: 100%;
    max-width: 860px;
    margin: 0 auto;
    padding: 58px 24px 20px;
  }

  .article-content {
    color: var(--text-body);
    font-size: 16.5px;
    line-height: 1.92;
    word-break: break-word;
  }

  .article-content > * + * {
    margin-top: 1.3em;
  }

  .article-content h2 {
    margin: 2em 0 .8em;
    font-size: 28px;
    line-height: 1.3;
    letter-spacing: -0.01em;
    color: #F2F7FF;
  }

  .article-content h3 {
    margin: 1.8em 0 .6em;
    font-size: 22px;
    line-height: 1.4;
    color: #EAF2FF;
  }

  .article-content p {
    margin-bottom: 1.15em;
  }

  .article-content a {
    color: var(--cyan);
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-color: rgba(56, 213, 255, .35);
    transition: color .2s, text-decoration-color .2s;
  }

  .article-content a:hover {
    color: #fff;
    text-decoration-color: var(--cyan);
  }

  .article-content ul,
  .article-content ol {
    margin: 1.2em 0;
    padding-left: 1.5em;
  }

  .article-content li {
    margin: .5em 0;
    padding-left: .2em;
  }

  .article-content li::marker {
    color: var(--cyan);
  }

  .article-content blockquote {
    position: relative;
    margin: 2em 0;
    padding: 18px 24px;
    border-left: 3px solid var(--cyan);
    border-radius: 0 14px 14px 0;
    background: rgba(56, 213, 255, .06);
    color: var(--text-muted);
    font-style: normal;
  }

  .article-content blockquote p:last-child {
    margin-bottom: 0;
  }

  .article-content table {
    width: 100%;
    margin: 22px 0;
    border-collapse: collapse;
    font-size: 14.5px;
  }

  .article-content th,
  .article-content td {
    border: 1px solid var(--stroke);
    padding: 11px 14px;
    text-align: left;
  }

  .article-content th {
    background: rgba(255, 255, 255, .05);
    color: var(--text-main);
    font-weight: 600;
  }

  .article-content code {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 7px;
    background: rgba(255, 255, 255, .07);
    color: var(--cyan);
    font-size: .92em;
  }

  .article-content pre {
    overflow-x: auto;
    padding: 20px;
    border-radius: 14px;
    background: rgba(7, 10, 20, .8);
    border: 1px solid var(--stroke);
    color: #DDE9FB;
    font-size: 14px;
    line-height: 1.7;
  }

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

  .article-content img {
    width: auto;
    max-width: 100%;
    border-radius: 18px;
    margin: 24px 0;
    border: 1px solid var(--stroke);
  }

  .article-end-line {
    display: flex;
    align-items: center;
    gap: 18px;
    margin: 64px 0 0;
  }

  .line-rule {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, .13));
  }

  .article-end-tip {
    color: var(--text-weak);
    font-size: 13px;
    letter-spacing: .08em;
    white-space: nowrap;
  }

  .article-cta-strip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
    max-width: 860px;
    margin: 46px auto 0;
    padding: 30px 32px;
    border: 1px solid rgba(56, 213, 255, .28);
    border-radius: 22px;
    background:
      radial-gradient(480px 180px at 0% 0%, rgba(56, 213, 255, .1), transparent 70%),
      rgba(255, 255, 255, .04);
    backdrop-filter: blur(18px);
  }

  .article-cta-strip h2 {
    font-size: 19px;
    color: #f5f9ff;
    margin-bottom: 6px;
  }

  .article-cta-strip p {
    color: var(--text-muted);
    font-size: 14px;
    max-width: 520px;
    margin-bottom: 0;
  }

  /* 相关推荐 */
  .related-section {
    padding: 74px 28px 80px;
    max-width: 1180px;
    margin: 0 auto;
  }

  .section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 30px;
  }

  .eyebrow {
    display: block;
    margin-bottom: 8px;
    color: var(--cyan);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .16em;
  }

  .related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .rel-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--stroke);
    border-radius: 20px;
    background: rgba(255, 255, 255, .035);
    backdrop-filter: blur(14px);
    transition: transform .26s ease, border-color .26s ease, background .26s ease;
  }

  .rel-card:hover {
    transform: translateY(-5px);
    border-color: rgba(56, 213, 255, .42);
    background: rgba(255, 255, 255, .055);
  }

  .rel-thumb {
    height: 178px;
    overflow: hidden;
    background: #0A1120;
  }

  .rel-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease, opacity .4s;
  }

  .rel-card:hover .rel-thumb img {
    transform: scale(1.05);
  }

  .rel-body {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 10px;
    padding: 22px 22px 24px;
  }

  .rel-body h3 {
    color: #fff;
    font-size: 18px;
    line-height: 1.45;
    transition: color .2s;
  }

  .rel-card:hover .rel-body h3 {
    color: var(--cyan);
  }

  .rel-body p {
    color: var(--text-weak);
    font-size: 14px;
    line-height: 1.65;
    margin-bottom: 4px;
  }

  .rel-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: auto;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    transition: color .2s;
  }

  .rel-link svg {
    width: 15px;
    height: 15px;
    transition: transform .2s;
  }

  .rel-card:hover .rel-link {
    color: var(--cyan);
  }

  .rel-card:hover .rel-link svg {
    transform: translateX(4px);
  }

  /* Footer */
  .site-footer {
    position: relative;
    z-index: 2;
    padding: 58px 0 28px;
    border-top: 1px solid rgba(255, 255, 255, .06);
    background: rgba(5, 8, 17, .65);
    backdrop-filter: blur(12px);
    margin-left: 248px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr;
    gap: 40px;
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 28px 44px;
  }

  .footer-brand p {
    color: var(--text-weak);
    font-size: 14px;
    line-height: 1.8;
    margin-top: 14px;
    max-width: 380px;
  }

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

  .footer-links h4 {
    color: #DFE8F8;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 10px;
  }

  .footer-links a {
    color: var(--text-weak);
    font-size: 14px;
    transition: color .2s, padding-left .2s;
  }

  .footer-links a:hover {
    color: var(--cyan);
    padding-left: 4px;
  }

  .footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-width: 1180px;
    margin: 0 auto;
    padding: 20px 28px 0;
    border-top: 1px solid rgba(255, 255, 255, .05);
    color: rgba(255, 255, 255, .3);
    font-size: 13px;
  }

  .footer-bottom p {
    margin: 0;
    line-height: 1.6;
  }

  @media (max-width: 1180px) {
    .container-xl,
    .footer-grid {
      padding-left: 22px;
      padding-right: 22px;
    }

    .related-grid {
      gap: 18px;
    }

    .rel-thumb {
      height: 150px;
    }
  }

  @media (max-width: 1023px) {
    .sidebar-area {
      width: 320px;
      transform: translateX(-105%);
      visibility: hidden;
      box-shadow: none;
      background: rgba(6, 10, 21, .96);
    }

    .sidebar-area.open {
      transform: translateX(0);
      visibility: visible;
      box-shadow: 40px 0 100px rgba(0, 0, 0, .45);
    }

    .drawer-scrim.show {
      display: block;
      opacity: 1;
      pointer-events: auto;
    }

    .main-shell {
      margin-left: 0;
      padding-top: 60px;
    }

    .site-footer {
      margin-left: 0;
    }

    .mobile-topbar {
      position: fixed;
      z-index: 70;
      top: 0;
      left: 0;
      right: 0;
      height: 60px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 18px;
      background: rgba(7, 12, 22, .82);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--stroke);
    }

    .mobile-topbar .mobile-brand-wrap {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .mobile-topbar .brand-name strong {
      font-size: 18px;
    }

    .mobile-topbar .mobile-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 42px;
      height: 42px;
      border-radius: 12px;
      border: 1px solid var(--stroke);
      background: rgba(255, 255, 255, .05);
      color: var(--text-main);
      cursor: pointer;
      transition: background .2s, color .2s;
    }

    .mobile-topbar .mobile-btn:hover {
      background: rgba(56, 213, 255, .08);
      color: var(--cyan);
    }

    .article-hero {
      padding: 48px 0 40px;
    }
  }

  @media (max-width: 900px) {
    .related-grid {
      grid-template-columns: repeat(2, 1fr);
    }

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

    .article-cta-strip {
      padding: 24px;
    }
  }

  @media (max-width: 768px) {
    .article-body-section {
      padding-top: 44px;
    }

    .crumbs .crumb-current {
      max-width: 220px;
    }

    .article-content {
      font-size: 16px;
    }

    .article-content h2 {
      font-size: 24px;
    }

    .article-content h3 {
      font-size: 20px;
    }

    .related-section .section-head {
      align-items: flex-start;
      flex-direction: column;
    }
  }

  @media (max-width: 620px) {
    .container-xl,
    .related-section {
      padding-left: 18px;
      padding-right: 18px;
    }

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

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

    .article-hero {
      padding: 42px 0 36px;
    }

    .article-cta-strip {
      flex-direction: column;
      align-items: flex-start;
      padding: 22px;
    }

    .article-cta-strip .btn-primary {
      width: 100%;
    }

    .article-end-tip {
      display: none;
    }

    .article-meta {
      gap: 8px 14px;
      font-size: 13px;
    }
  }

/* roulang page: category1 */
:root {
  --bg-deep: #070C16;
  --bg-panel: #0D1530;
  --bg-card: rgba(255, 255, 255, 0.04);
  --line-card: rgba(255, 255, 255, 0.08);
  --brand: #38D5FF;
  --indigo: #4B74FF;
  --amber: #FFC24D;
  --online: #3CE6AE;
  --text-main: #EAF2FF;
  --text-sub: #A6B6D3;
  --text-weak: #677B98;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --shadow-glow: 0 0 28px rgba(47, 212, 255, 0.35);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-deep);
  background-image: radial-gradient(circle at 78% 12%, rgba(75, 116, 255, 0.16), transparent 30%), radial-gradient(circle at 12% 2%, rgba(56, 213, 255, 0.08), transparent 25%), radial-gradient(circle at 75% 94%, rgba(255, 194, 77, 0.05), transparent 22%);
  color: var(--text-main);
  font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: radial-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.32;
}

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

strong {
  font-weight: 700;
}

.container {
  width: min(1180px, 100% - 48px);
  margin-inline: auto;
}

.app-canvas {
  margin-left: 248px;
  width: auto;
  min-height: 100vh;
}

.content-pad {
  padding: 44px clamp(20px, 3vw, 40px) 20px;
}

/* ===== sidebar ===== */
.site-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 248px;
  height: 100vh;
  z-index: 62;
  background: rgba(9, 15, 31, 0.86);
  backdrop-filter: blur(18px);
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  transform: translateX(0);
  transition: transform 0.28s ease;
  display: flex;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: 24px 14px 20px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 8px;
  margin-bottom: 20px;
  outline: none;
  border-radius: 12px;
}

.logo-mark {
  position: relative;
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(47, 212, 255, 0.2), rgba(75, 116, 255, 0.14));
  border: 1px solid rgba(56, 213, 255, 0.5);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
}

.logo-mark i {
  display: block;
  width: 5px;
  height: 18px;
  border-radius: 4px;
  background: linear-gradient(180deg, #38D5FF, #4B74FF);
}

.logo-mark i:nth-child(2) {
  height: 11px;
  opacity: 0.75;
}

.logo-mark i:nth-child(3) {
  height: 24px;
  opacity: 0.55;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.18;
}

.brand-copy strong {
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: #fff;
}

.brand-copy em {
  font-style: normal;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--brand);
  letter-spacing: 0.12em;
}

.side-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: 14px;
  color: var(--text-sub);
  font-size: 0.93rem;
  font-weight: 500;
  border: 1px solid transparent;
  transition: color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.nav-item svg {
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  color: var(--text-weak);
  transition: color 0.18s ease;
}

.nav-item:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.nav-item:hover svg {
  color: var(--brand);
}

.nav-item.active {
  color: #fff;
  background: linear-gradient(90deg, rgba(56, 213, 255, 0.13), rgba(56, 213, 255, 0.02));
  box-shadow: inset 2px 0 0 var(--brand);
  border-color: rgba(56, 213, 255, 0.1);
}

.nav-item.active svg {
  color: var(--brand);
  filter: drop-shadow(0 0 6px rgba(56, 213, 255, 0.7));
}

.nav-item:focus-visible,
.brand-lockup:focus-visible,
.nav-trigger:focus-visible,
a:focus-visible,
button:focus-visible {
  outline: 2px solid rgba(56, 213, 255, 0.75);
  outline-offset: 2px;
}

.side-state-card {
  margin-top: auto;
  margin-bottom: 14px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 13px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
}

.pulse-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--online);
  box-shadow: 0 0 0 0 rgba(60, 230, 174, 0.65);
  animation: pulse 2s infinite;
  margin-top: 10px;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(60, 230, 174, 0.45); }
  70% { box-shadow: 0 0 0 9px rgba(60, 230, 174, 0); }
  100% { box-shadow: 0 0 0 0 rgba(60, 230, 174, 0); }
}

.state-text {
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--text-sub);
}

.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-size: 0.93rem;
  font-weight: 600;
  border-radius: 12px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease, filter 0.18s ease;
  cursor: pointer;
  text-align: center;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, #2FD4FF, #4B74FF);
  color: #fff;
  box-shadow: var(--shadow-glow);
  filter: saturate(1);
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.15);
  box-shadow: 0 10px 34px rgba(47, 212, 255, 0.45);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 12px rgba(47, 212, 255, 0.2);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.035);
  border-color: rgba(255, 255, 255, 0.14);
  color: var(--text-main);
}

.btn-ghost:hover {
  border-color: rgba(56, 213, 255, 0.7);
  color: var(--brand);
  box-shadow: 0 0 18px rgba(56, 213, 255, 0.12);
}

.btn-block {
  width: 100%;
}

/* ===== mobile header ===== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 70;
  height: 60px;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: rgba(7, 12, 22, 0.84);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.nav-trigger {
  width: 40px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  cursor: pointer;
}

.nav-trigger:hover {
  border-color: rgba(56, 213, 255, 0.6);
}

.nav-scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(4, 8, 18, 0.66);
  backdrop-filter: blur(4px);
}

body.nav-open .nav-scrim {
  display: block;
}

body.nav-open .site-sidebar {
  transform: translateX(0);
  box-shadow: 0 0 60px rgba(0, 0, 0, 0.4);
}

/* ===== top hero for category ===== */
.page-hero {
  position: relative;
  overflow: hidden;
  padding: 52px 0 64px;
  border-radius: 22px;
  background-image: url("/assets/images/backpic/back-2.webp");
  background-size: cover;
  background-position: center;
  background-color: #0B1220;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(80deg, rgba(7, 12, 22, 0.93), rgba(7, 12, 22, 0.62));
}

.page-hero::after {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  right: -100px;
  top: -60px;
  background: radial-gradient(circle, rgba(56, 213, 255, 0.25), transparent 65%);
  pointer-events: none;
}

.page-hero .container {
  position: relative;
  z-index: 2;
}

.crumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-sub);
  margin-bottom: 18px;
}

.crumb a {
  color: var(--text-sub);
  transition: color 0.15s ease;
}

.crumb a:hover {
  color: var(--brand);
}

.crumb .sep {
  color: var(--text-weak);
}

.crumb .current {
  color: var(--text-main);
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 22px;
  align-items: center;
}

.status-capsule {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: rgba(255, 194, 77, 0.09);
  border: 1px solid rgba(255, 194, 77, 0.2);
  color: var(--amber);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 500;
  backdrop-filter: blur(10px);
}

.status-capsule .dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--amber);
  box-shadow: 0 0 0 0 rgba(255, 194, 77, 0.7);
  animation: pulse 2s infinite;
}

.hero-layout h1 {
  font-size: clamp(2rem, 4.8vw, 3.4rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: #fff;
  margin: 20px 0 16px;
  background: linear-gradient(100deg, #fff, #A8E9FF 50%, #EAF2FF);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-layout h1 strong {
  color: var(--brand);
  background: linear-gradient(95deg, #38D5FF, #7DEDFF);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-layout p.lead {
  max-width: 560px;
  font-size: 1.05rem;
  color: rgba(234, 242, 255, 0.86);
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 26px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-tags span,
.mono-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 7px 13px;
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--text-sub);
}

.hero-tag-mark {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--brand);
  display: inline-block;
}

.hero-device {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: rgba(10, 16, 31, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px;
  padding: 22px;
  backdrop-filter: blur(20px);
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.32);
}

.hero-device::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(130deg, rgba(56, 213, 255, 0.14), transparent 60%);
  pointer-events: none;
}

.hero-device .device-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.86rem;
  color: var(--text-sub);
}

.hero-device .device-head strong {
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.hero-device .device-head strong::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--online);
  display: inline-block;
}

.device-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.device-step {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 12px;
  padding: 12px 13px;
}

.device-step-icon {
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(56, 213, 255, 0.12);
  color: var(--brand);
}

.device-step p {
  font-size: 0.83rem;
  color: var(--text-sub);
  line-height: 1.5;
}

.device-step strong {
  color: #fff;
  font-weight: 600;
}

/* ===== sections ===== */
.section-gap {
  padding: 78px 0;
}

.section-gap-sm {
  padding: 48px 0;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--brand);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 14px;
  height: 2px;
  background: var(--brand);
  border-radius: 999px;
}

.section-title {
  font-size: clamp(1.6rem, 3.2vw, 2.36rem);
  font-weight: 800;
  line-height: 1.24;
  color: #fff;
  margin: 12px 0 10px;
  letter-spacing: -0.01em;
}

.section-sub {
  color: var(--text-sub);
  font-size: 1rem;
  max-width: 680px;
  margin-bottom: 40px;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 36px;
}

/* ===== glass cards / chips ===== */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--line-card);
  backdrop-filter: blur(18px);
  border-radius: var(--radius-lg);
  transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 213, 255, 0.34);
  background: rgba(255, 255, 255, 0.06);
}

.num-tabular {
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

/* ===== notice timeline ===== */
.notice-timeline {
  position: relative;
  padding-left: 30px;
}

.notice-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 22px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, rgba(56, 213, 255, 0.7), rgba(56, 213, 255, 0.15));
  border-radius: 999px;
}

.tl-node {
  position: relative;
  padding-bottom: 26px;
}

.tl-node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 26px;
  width: 13px;
  height: 13px;
  border-radius: 999px;
  background: #0D1530;
  border: 3px solid var(--brand);
  box-shadow: 0 0 12px rgba(56, 213, 255, 0.56);
}

.tl-node.dim::before {
  border-color: rgba(255, 255, 255, 0.42);
  box-shadow: none;
}

.tl-card {
  position: relative;
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 20px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
  padding: 24px;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  overflow: hidden;
}

.tl-card:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 213, 255, 0.3);
  background: rgba(255, 255, 255, 0.055);
}

.tl-date {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.tl-date .month {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
  padding-bottom: 4px;
}

.tl-date .kind {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 194, 77, 0.1);
  border: 1px solid rgba(255, 194, 77, 0.22);
  color: var(--amber);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}

.tl-content h3 {
  font-size: 1.14rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.5;
}

.tl-content p {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.85;
  max-width: 720px;
}

.tl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.tl-tags span {
  background: rgba(56, 213, 255, 0.07);
  border: 1px solid rgba(56, 213, 255, 0.16);
  color: #9AE6FF;
  font-size: 0.8rem;
  border-radius: 999px;
  padding: 3px 10px;
}

/* ===== highlight strip ===== */
.highlight-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 18px;
}

.high-card {
  padding: 26px 22px;
}

.high-card .h-ico {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(56, 213, 255, 0.16), rgba(75, 116, 255, 0.16));
  color: var(--brand);
  border: 1px solid rgba(56, 213, 255, 0.18);
  margin-bottom: 16px;
}

.high-card h3 {
  color: #fff;
  font-weight: 700;
  font-size: 1.04rem;
  margin-bottom: 6px;
}

.high-card p {
  font-size: 0.91rem;
  color: var(--text-sub);
}

/* ===== cover strip ===== */
.cover-scene {
  position: relative;
  overflow: hidden;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 300px;
  display: flex;
  align-items: center;
  isolation: isolate;
}

.cover-scene img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.cover-scene::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(92deg, rgba(7, 12, 22, 0.94), rgba(7, 12, 22, 0.56) 65%, rgba(7, 12, 22, 0.43));
}

.scene-content {
  max-width: 640px;
  padding: 42px 46px;
}

.scene-content .tag {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 194, 77, 0.12);
  border: 1px solid rgba(255, 194, 77, 0.26);
  color: var(--amber);
  padding: 5px 15px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 18px;
}

.scene-content h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.scene-content p {
  font-size: 1rem;
  color: rgba(234, 242, 255, 0.84);
  margin-bottom: 22px;
}

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

/* ===== comparison funnel ===== */
.route-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
}

.route-card {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 26px 24px;
}

.route-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.route-head h3 {
  font-weight: 700;
  color: #fff;
  font-size: 1.06rem;
}

.route-head .route-pill {
  display: inline-flex;
  align-items: center;
  font-size: 0.72rem;
  padding: 4px 11px;
  border-radius: 999px;
  color: var(--text-sub);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  gap: 6px;
}

.route-pill.better {
  color: var(--online);
  border-color: rgba(60, 230, 174, 0.32);
  background: rgba(60, 230, 174, 0.08);
}

.route-steps {
  position: relative;
  margin-top: 6px;
}

.route-node {
  position: relative;
  display: flex;
  gap: 12px;
  padding: 10px 0 18px 22px;
  color: var(--text-sub);
  font-size: 0.89rem;
  line-height: 1.6;
}

.route-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.3);
}

.route-node::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 13px;
  bottom: -2px;
  width: 1px;
  background: rgba(255, 255, 255, 0.15);
}

.route-steps .route-node:last-child::after {
  display: none;
}

.route-card.smart .route-node::before {
  background: var(--brand);
  box-shadow: 0 0 9px rgba(56, 213, 255, 0.85);
}

.route-node strong {
  color: var(--text-main);
  font-weight: 600;
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 860px;
}

.faq-item {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.faq-item[open] {
  border-color: rgba(56, 213, 255, 0.32);
  background: rgba(255, 255, 255, 0.05);
}

.faq-item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  color: var(--text-main);
  padding: 19px 22px;
  font-size: 1rem;
  transition: color 0.15s ease;
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--brand);
  flex: 0 0 auto;
  margin-top: 4px;
  box-shadow: 0 0 0 rgba(56, 213, 255, 0);
  transition: box-shadow 0.2s ease;
}

.faq-item[open] summary::before {
  box-shadow: 0 0 0 4px rgba(56, 213, 255, 0.13);
}

.faq-item summary .chev {
  margin-left: auto;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  position: relative;
  transition: transform 0.25s ease;
  opacity: 0.8;
}

.faq-item summary .chev::before,
.faq-item summary .chev::after {
  content: "";
  position: absolute;
  top: 8px;
  width: 8px;
  height: 2px;
  background: var(--text-main);
  border-radius: 4px;
  left: 5px;
}

.faq-item summary .chev::after {
  transform: rotate(90deg);
}

.faq-item[open] summary .chev {
  transform: rotate(45deg);
}

.faq-body {
  padding: 0 22px 20px 42px;
  color: var(--text-sub);
  font-size: 0.95rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
  margin-top: -4px;
}

.faq-body p {
  padding-top: 14px;
}

/* ===== CTA FORM ===== */
.cta-panel {
  background: rgba(10, 16, 31, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: clamp(26px, 5vw, 54px);
  display: grid;
  grid-template-columns: 1fr minmax(0, 0.85fr);
  gap: 26px;
  align-items: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 18px 70px rgba(0, 0, 0, 0.3);
}

.cta-panel::before {
  content: "";
  position: absolute;
  width: 240px;
  height: 240px;
  right: -80px;
  bottom: -90px;
  background: radial-gradient(circle, rgba(56, 213, 255, 0.2), transparent 70%);
  pointer-events: none;
}

.cta-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
  background: linear-gradient(95deg, #fff, #B5ECFF);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 14px;
}

.cta-desc {
  color: var(--text-sub);
  font-size: 1rem;
  max-width: 440px;
}

.cta-panel form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-group label {
  display: block;
  font-size: 0.83rem;
  color: var(--text-sub);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input,
.form-group select {
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 12px 14px;
  color: var(--text-main);
  outline: none;
  transition: border-color 0.2s ease, background 0.2s ease;
  appearance: none;
}

.form-group input:focus,
.form-group select:focus {
  border-color: rgba(56, 213, 255, 0.7);
  background: rgba(255, 255, 255, 0.07);
}

.form-group input::placeholder {
  color: var(--text-weak);
}

.form-group input.input-error {
  border-color: rgba(255, 110, 110, 0.8);
}

.form-error-msg,
.form-success-msg {
  font-size: 0.84rem;
  display: none;
  padding: 7px 10px;
  border-radius: 8px;
}

.form-error-msg {
  color: #FFAAAA;
  background: rgba(255, 90, 90, 0.08);
}

.form-success-msg {
  color: var(--online);
  background: rgba(60, 230, 174, 0.08);
}

.form-success .form-success-msg {
  display: block;
}

.form-error .form-error-msg {
  display: block;
}

/* ===== footer ===== */
.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.065);
  background-color: rgba(7, 12, 22, 0.65);
  backdrop-filter: blur(14px);
  padding: 56px 0 24px;
  margin-top: 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.7fr 0.9fr;
  gap: 40px;
  margin-bottom: 44px;
}

.footer-brand .logo-mark {
  margin-bottom: 14px;
  background: rgba(13, 21, 48, 0.6);
}

.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.75;
}

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

.footer-links h4 {
  color: #fff;
  font-weight: 600;
  margin-bottom: 12px;
  font-size: 0.98rem;
}

.footer-links a {
  color: var(--text-sub);
  font-size: 0.84rem;
  line-height: 2.2;
  transition: color 0.15s ease;
  padding-right: 8px;
}

.footer-links a:hover {
  color: var(--brand);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom p {
  color: var(--text-weak);
  font-size: 0.8rem;
  line-height: 1.6;
}

/* decimals row */
.simulate-note {
  font-size: 0.76rem;
  color: var(--text-weak);
  margin-top: 8px;
}

/* ===== responsive ===== */
@media (max-width: 1279px) {
  .site-sidebar {
    width: 220px;
  }
  .app-canvas {
    margin-left: 220px;
  }
}

@media (max-width: 1023px) {
  .app-canvas {
    margin-left: 0;
    padding-top: 60px;
  }
  .site-sidebar {
    width: 320px;
    transform: translateX(-100%);
    background: rgba(7, 12, 22, 0.93);
    backdrop-filter: blur(22px);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
  }
  .site-sidebar.is-shown {
    transform: translateX(0);
  }
  .mobile-header {
    display: flex;
  }
  .content-pad {
    padding-top: 24px;
  }
  .section-gap {
    padding: 52px 0;
  }
  .cta-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  .container {
    width: min(100% - 30px, 1180px);
  }
  .hero-layout {
    grid-template-columns: 1fr;
  }
  .hero-device {
    display: none;
  }
  .tl-card {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 20px;
  }
  .tl-tags span {
    font-size: 0.77rem;
  }
  .highlight-grid {
    grid-template-columns: 1fr;
  }
  .route-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 26px;
    margin-bottom: 26px;
  }
  .footer-bottom {
    flex-direction: column;
  }
  .cover-scene {
    min-height: 240px;
  }
  .scene-content {
    padding: 26px 22px;
  }
  .cta-panel {
    padding: 24px 20px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* roulang page: category2 */
:root{
  --bg:#070C16;
  --panel:#0D1530;
  --panel-2:#111E3C;
  --panel-glass:rgba(255,255,255,0.04);
  --line:rgba(255,255,255,0.08);
  --line-strong:rgba(255,255,255,0.16);
  --cyan:#38D5FF;
  --cyan-2:#2FD4FF;
  --indigo:#4B74FF;
  --amber:#FFC24D;
  --green:#3CE6AE;
  --text:#EAF2FF;
  --text-2:#A6B6D3;
  --muted:#677B98;
  --radius:28px;
  --radius-md:18px;
  --radius-btn:12px;
  --font:'PingFang SC','Microsoft YaHei','Source Han Sans SC','Noto Sans SC',system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.8;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{list-style:none}
::selection{background:rgba(56,213,255,.22);color:#fff}
:focus-visible{outline:2px solid rgba(56,213,255,.7);outline-offset:3px;border-radius:6px}

.app-shell{position:relative;isolation:isolate;min-height:100vh}
.app-shell::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(720px 360px at 4% 2%, rgba(75,116,255,.20), transparent 60%),
    radial-gradient(560px 260px at 86% 12%, rgba(56,213,255,.10), transparent 60%),
    radial-gradient(900px 400px at 60% 110%, rgba(255,194,77,.05), transparent 60%);
}

.side-panel{
  position:fixed;
  top:0;
  left:0;
  width:248px;
  height:100vh;
  z-index:120;
  display:flex;
  flex-direction:column;
  background:linear-gradient(180deg,#0A1527 0%,#091120 100%);
  border-right:1px solid rgba(255,255,255,.06);
  transform:translateX(-105%);
  transition:transform .35s cubic-bezier(.2,.8,.2,1);
}
@media (min-width:1024px){
  .side-panel{transform:none;width:248px}
  .content-shell{margin-left:248px}
}
.side-inner{height:100%;display:flex;flex-direction:column;padding:32px 22px 24px}
.brand{display:flex;align-items:center;gap:12px;border-radius:16px}
.brand:focus-visible{outline-color:rgba(56,213,255,.7)}
.logo-mark{position:relative;flex:0 0 40px;height:40px;border-radius:13px;background:rgba(56,213,255,.1);border:1px solid rgba(56,213,255,.35);box-shadow:0 0 24px rgba(56,213,255,.12) inset}
.logo-mark::before,.logo-mark::after{content:"";position:absolute;left:10px;right:10px;height:2px;border-radius:99px;background:linear-gradient(90deg,var(--cyan),var(--indigo));box-shadow:0 0 8px rgba(56,213,255,.8)}
.logo-mark::before{top:13px}
.logo-mark::after{top:24px;opacity:.55}
.brand-name{display:flex;flex-direction:column;gap:1px;line-height:1.15}
.brand-name strong{font-size:20px;font-weight:800;letter-spacing:.04em}
.brand-name span{font-size:11.5px;color:var(--text-2);letter-spacing:.14em;white-space:nowrap}

.side-nav{display:flex;flex-direction:column;gap:7px;margin-top:46px}
.nav-item{position:relative;display:flex;align-items:center;gap:12px;padding:12px 15px;border-radius:14px;color:var(--text-2);font-size:15px;font-weight:500;line-height:1.3;transition:all .22s}
.nav-item svg{width:20px;height:20px;flex:0 0 20px;stroke-width:1.8;opacity:.85;transition:opacity .2s,color .2s}
.nav-item:hover{background:rgba(56,213,255,.07);color:var(--text)}
.nav-item.active{background:rgba(56,213,255,.1);color:var(--cyan);font-weight:600}
.nav-item.active::before{content:"";position:absolute;left:-22px;top:11px;bottom:11px;width:2px;border-radius:99px;background:var(--cyan);box-shadow:0 0 16px var(--cyan)}
.nav-item.active svg{color:var(--cyan);opacity:1}

.side-foot{margin-top:auto;display:grid;gap:16px}
.status-mini{display:flex;align-items:center;gap:9px;padding:11px 12px;border:1px solid rgba(255,255,255,.07);border-radius:14px;background:rgba(255,255,255,.03);font-size:12.5px;color:var(--text-2);line-height:1.5}
.status-dot{position:relative;flex:0 0 8px;width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 0 rgba(60,230,174,.5);animation:dotPulse 2.4s infinite}
@keyframes dotPulse{
  0%{box-shadow:0 0 0 0 rgba(60,230,174,.50)}
  70%{box-shadow:0 0 0 9px rgba(60,230,174,0)}
  100%{box-shadow:0 0 0 0 rgba(60,230,174,0)}
}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius-btn);padding:12px 20px;font-size:15px;font-weight:600;line-height:1.45;transition:transform .2s ease,box-shadow .2s ease,filter .2s ease,border-color .2s;white-space:nowrap}
.btn svg{width:17px;height:17px}
.btn-primary{background:linear-gradient(135deg,var(--cyan-2),var(--indigo));color:#06121E;box-shadow:0 0 26px rgba(47,212,255,.28),0 12px 30px rgba(15,30,80,.26);border:1px solid rgba(255,255,255,.12)}
.btn-primary:hover{filter:brightness(1.12);transform:translateY(-2px);box-shadow:0 0 34px rgba(47,212,255,.42)}
.btn-primary:active{transform:translateY(0) scale(.99);filter:brightness(1);box-shadow:0 0 14px rgba(47,212,255,.24)}
.btn-ghost{border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);color:var(--text);backdrop-filter:blur(10px)}
.btn-ghost:hover{border-color:rgba(56,213,255,.65);background:rgba(56,213,255,.08);color:var(--cyan);transform:translateY(-2px)}
.btn-block{width:100%}
.btn-sm{padding:8px 13px;font-size:13.5px;border-radius:10px}

.mobile-header{display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:130;background:rgba(7,12,22,.86);backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.07)}
.mobile-inner{height:60px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;max-width:1180px;margin:0 auto}
.mobile-inner .brand-name strong{font-size:18px}
.mobile-inner .brand-name span{font-size:10.5px}
.mobile-menu-btn{width:42px;height:42px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;border-radius:12px;background:rgba(255,255,255,.06)}
.mobile-menu-btn span{display:block;width:20px;height:2px;border-radius:99px;background:var(--text)}
.screen-backdrop{position:fixed;inset:0;z-index:110;background:rgba(4,8,18,.68);backdrop-filter:blur(5px);opacity:0;visibility:hidden;transition:all .3s}
@media (max-width:1023.5px){
  .side-panel{top:60px;height:calc(100vh - 60px);box-shadow:18px 0 60px rgba(0,0,0,.35)}
  body.nav-open .side-panel{transform:translateX(0)}
  body.nav-open .screen-backdrop{opacity:1;visibility:visible}
  .mobile-header{display:block}
  .side-inner{padding:22px 20px 20px}
  .side-nav{margin-top:30px}
}
@media (min-width:1024px){
  .screen-backdrop,.mobile-menu-btn{display:none!important}
}

.content-shell{display:flex;flex-direction:column;min-height:100vh}
.page-main{flex:1 0 auto;padding:56px clamp(20px,4vw,64px) 72px;width:100%}
.container{width:min(100%,1180px);margin:0 auto}
.panel-glass{background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.018));border:1px solid rgba(255,255,255,.09);border-radius:var(--radius);backdrop-filter:blur(18px);box-shadow:0 22px 60px rgba(3,7,20,.32)}

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-2);margin:8px 0 24px}
.breadcrumb a{color:var(--muted);transition:color .2s}
.breadcrumb a:hover{color:var(--cyan)}
.crumb-arrow{color:var(--muted);font-size:12px}
.crumb-current{color:var(--text-2)}

.hero-compact{
  position:relative;
  overflow:hidden;
  padding:clamp(28px,4.2vw,46px);
  border-radius:30px;
  background-image:linear-gradient(95deg,rgba(5,10,20,.9) 10%,rgba(8,16,33,.64) 58%,rgba(13,26,52,.52)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center 42%;
  border:1px solid rgba(255,255,255,.08);
}
.hero-inner{position:relative;z-index:2;max-width:900px}
.hero-topline{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:18px}
.hero-badge{display:inline-flex;align-items:center;gap:9px;padding:6px 13px 6px 10px;background:rgba(255,194,77,.1);border:1px solid rgba(255,194,77,.28);color:var(--amber);border-radius:999px;font-size:12.5px;font-weight:600;line-height:1.6}
.hero-badge .status-dot{background:var(--amber);animation:dotPulseAmber 2.6s infinite}
@keyframes dotPulseAmber{0%{box-shadow:0 0 0 0 rgba(255,194,77,.4)}70%{box-shadow:0 0 0 8px rgba(255,194,77,0)}100%{box-shadow:0 0 0 0 rgba(255,194,77,0)}}
.hero-title{max-width:820px;font-size:clamp(29px,5vw,44px);font-weight:800;line-height:1.25;letter-spacing:-.01em;color:#fff}
.hero-title em{font-style:normal;color:var(--cyan)}
.hero-sub{margin-top:18px;max-width:740px;color:var(--text-2);font-size:16px;line-height:1.9}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-tag{font-size:13px;color:var(--text-2);border:1px solid rgba(255,255,255,.1);background:rgba(255,255,255,.035);border-radius:999px;padding:5px 13px;line-height:1.5}

.section-block{margin-top:clamp(48px,6vw,76px)}
.section-head{margin-bottom:26px;max-width:860px}
.eyebrow{font-size:13px;font-weight:600;color:var(--cyan);letter-spacing:.08em;display:flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--cyan);border-radius:99px;box-shadow:0 0 10px var(--cyan)}
.section-title{margin-top:12px;font-size:clamp(24px,3vw,32px);line-height:1.35;font-weight:750;letter-spacing:-.01em}
.section-lead{color:var(--text-2);font-size:15.5px;margin-top:12px;max-width:820px}

.matrix-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:22px}
.matrix-card{grid-column:span 12;padding:24px;border-radius:26px;transition:transform .24s ease,border-color .24s ease;background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));border:1px solid rgba(255,255,255,.09);backdrop-filter:blur(18px);overflow:hidden}
.matrix-card:hover{transform:translateY(-4px);border-color:rgba(56,213,255,.4);box-shadow:0 16px 46px rgba(0,0,0,.24)}
.matrix-card.m7{grid-column:span 7}
.matrix-card.m5{grid-column:span 5}
.matrix-flex{display:flex;flex-direction:column;gap:20px;height:100%}
.mf-copy{display:flex;flex-direction:column;gap:8px;height:100%}
.mf-media{border-radius:18px;overflow:hidden;position:relative;min-height:190px;background:var(--panel-2)}
.mf-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.mf-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,11,22,.2),rgba(6,11,22,.02));pointer-events:none}
.matrix-card:hover .mf-media img{transform:scale(1.045)}
.mf-kicker{display:flex;align-items:center;justify-content:space-between;gap:12px}
.icon-chip{width:42px;height:42px;flex:0 0 42px;border-radius:13px;display:flex;align-items:center;justify-content:center;background:rgba(56,213,255,.1);border:1px solid rgba(56,213,255,.2);color:var(--cyan)}
.icon-chip svg{width:23px;height:23px}
.card-tag{font-size:12.5px;color:var(--muted);background:rgba(255,255,255,.05);border-radius:999px;padding:4px 12px;white-space:nowrap}
.mf-copy h3{font-size:clamp(19px,2.1vw,22px);font-weight:700;margin-top:2px;letter-spacing:.01em}
.mf-copy p{font-size:14.5px;line-height:1.85;color:var(--text-2)}
.mf-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.mf-list li{font-size:12.5px;color:var(--text);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.07);border-radius:999px;padding:4px 12px}
.mf-link{margin-top:18px;display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-size:14px;font-weight:600}
.mf-link:hover{text-shadow:0 0 12px rgba(56,213,255,.55)}
.mf-link svg{width:15px;height:15px;transition:transform .2s}
.mf-link:hover svg{transform:translateX(3px)}
@media (max-width:1199px){.matrix-card.m7,.matrix-card.m5{grid-column:span 12}}
@media (min-width:900px){.matrix-flex.is-row{flex-direction:row}.matrix-flex.is-row .mf-media{flex:0 0 46%}.matrix-flex.is-row .mf-copy{flex:1}}

.sync-wrap{display:grid;grid-template-columns:repeat(12,1fr);gap:22px}
.sync-card{grid-column:span 6;padding:26px;border-radius:26px}
.sync-card.full{grid-column:span 12}
@media (max-width:1100px){.sync-card{grid-column:span 12}}
.sync-title{display:flex;align-items:center;gap:10px;font-size:16.5px;font-weight:700}
.sync-note{margin-top:14px;color:var(--text-2);font-size:14.5px}
.sync-time{display:inline-flex;align-items:center;gap:8px;margin-top:12px;font-size:13px;color:var(--amber);background:rgba(255,194,77,.08);border-radius:999px;padding:3px 12px}
.sync-list{margin-top:14px;display:grid;gap:10px}
.sync-list li{list-style:none;padding-left:18px;position:relative;font-size:14px;line-height:1.8;color:var(--text-2)}
.sync-list li::before{content:"";position:absolute;left:2px;top:12px;width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:18px}
.compare-cell{padding:18px;border-radius:18px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06)}
.compare-cell h4{font-size:15px;font-weight:700;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.compare-cell svg{width:17px;height:17px;color:var(--cyan)}
.compare-cell p{color:var(--text-2);font-size:13.5px;line-height:1.85}
@media (max-width:700px){.compare-grid{grid-template-columns:1fr}}

.feature-banner{position:relative;margin-top:clamp(48px,6vw,76px);border-radius:var(--radius);overflow:hidden;min-height:330px;border:1px solid rgba(255,255,255,.08)}
.feature-banner img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.fb-layer{position:absolute;inset:0;background:linear-gradient(100deg,rgba(6,12,24,.94) 20%,rgba(8,18,36,.72) 60%,rgba(20,33,57,.48)),rgba(6,12,22,.23)}
.fb-content{position:relative;z-index:2;padding:clamp(26px,4vw,48px);max-width:650px}
.fb-content .eyebrow{color:var(--amber)}
.fb-content .eyebrow::before{background:var(--amber);box-shadow:none}
.fb-content h2{margin-top:14px;font-size:clamp(23px,3vw,30px);line-height:1.35;font-weight:750}
.fb-content p{margin-top:12px;color:var(--text-2);font-size:15px}
.fb-points{display:grid;gap:12px;margin-top:22px}
.fb-points li{display:flex;gap:12px;align-items:flex-start;color:var(--text);font-size:14.5px;line-height:1.8}
.fb-points .num{flex:0 0 26px;height:26px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:rgba(56,213,255,.12);border:1px solid rgba(56,213,255,.3);color:var(--cyan);font-size:12px;font-weight:700;margin-top:3px}

.update-panel{padding:clamp(24px,3vw,34px)}
.update-head{display:flex;flex-direction:column;gap:4px}
.update-title{font-size:20px;font-weight:750}
.update-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:22px}
.update-item{position:relative;padding-left:24px;border-left:2px solid rgba(56,213,255,.16)}
.update-item::before{content:"";position:absolute;left:-6px;top:6px;width:10px;height:10px;border-radius:50%;background:var(--cyan);box-shadow:0 0 14px var(--cyan)}
.update-item time{display:block;font-size:12.5px;color:var(--muted)}
.update-item p{font-size:14.5px;color:var(--text-2);line-height:1.8;margin-top:5px}
@media (max-width:760px){.update-grid{grid-template-columns:1fr}}

.faq-list{display:grid;gap:14px;margin-top:28px}
.faq-item{border:1px solid rgba(255,255,255,.09);border-radius:18px;background:rgba(255,255,255,.03);transition:border-color .25s,background .25s}
.faq-item:hover{border-color:rgba(56,213,255,.24)}
.faq-item summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 22px;cursor:pointer;font-weight:600;font-size:15.5px;color:var(--text);width:100%}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item[open]{border-color:rgba(56,213,255,.35);background:rgba(56,213,255,.03)}
.faq-icon{flex:0 0 22px;width:22px;height:22px;position:relative;background:rgba(56,213,255,.08);border:1px solid rgba(56,213,255,.22);border-radius:7px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--cyan);border-radius:99px}
.faq-icon::before{width:10px;height:2px;left:5px;top:9px}
.faq-icon::after{width:2px;height:10px;left:9px;top:5px;transition:opacity .2s}
.faq-item[open] .faq-icon::after{opacity:0}
.faq-answer{padding:0 22px 18px;color:var(--text-2);font-size:14.5px;line-height:1.9}
.faq-answer p+ p{margin-top:8px}

.cta-panel{margin-top:clamp(48px,6vw,76px);padding:clamp(24px,4vw,44px);border-radius:30px;background:linear-gradient(135deg,rgba(56,213,255,.09),rgba(75,116,255,.05)) ,var(--panel-glass);box-shadow:0 30px 70px rgba(0,0,0,.3)}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
@media (max-width:900px){.cta-grid{grid-template-columns:1fr;gap:28px}}
.cta-title{font-size:clamp(22px,3vw,28px);font-weight:750;line-height:1.4}
.cta-text{color:var(--text-2);font-size:15px;margin-top:12px}
.cta-mini{margin-top:22px;list-style:none;display:grid;gap:12px}
.cta-mini li{display:flex;gap:12px;align-items:flex-start;color:var(--text);font-size:14px}
.cta-mini .icon-chip{width:32px;height:32px;flex:0 0 32px;border-radius:10px}
.cta-mini .icon-chip svg{width:17px;height:17px}
.cta-form-grid{display:grid;gap:18px}
.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:560px){.field-grid{grid-template-columns:1fr}}
.field-label{display:block;font-size:13px;font-weight:600;color:var(--text);margin-bottom:7px}
.input-control{width:100%;border-radius:13px;padding:11px 14px;background:rgba(7,15,30,.5);border:1px solid rgba(255,255,255,.14);color:var(--text);font-size:14.5px;transition:border-color .2s,background .2s;line-height:1.5}
.input-control:hover{border-color:rgba(255,255,255,.26)}
.input-control:focus{outline:none;border-color:rgba(56,213,255,.75);box-shadow:0 0 0 3px rgba(56,213,255,.12)}
.field-error{display:none;font-size:12.5px;color:#FF8A8A;margin-top:6px}
.input-control.invalid{border-color:rgba(255,108,108,.75)}
.input-control.invalid~.field-error{display:block}
.select-wrap{position:relative}
.select-wrap select{appearance:none;-webkit-appearance:none;padding-right:36px}
.form-note{font-size:12px;color:var(--muted);line-height:1.7;margin-top:6px}

.site-footer{margin-top:60px;padding:44px 0 26px;border-top:1px solid rgba(255,255,255,.06);background:rgba(7,12,22,.4)}
.site-footer .container{padding-left:20px;padding-right:20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:42px}
@media (max-width:900px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}.footer-brand{grid-column:1/-1}}
.footer-brand p{font-size:13px;color:var(--text-2);line-height:1.85;margin-top:14px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links h4{font-size:15px;font-weight:700;color:var(--text);margin-bottom:6px}
.footer-links a{color:var(--text-2);font-size:13.5px;transition:color .2s,transform .2s;width:fit-content}
.footer-links a:hover{color:var(--cyan);transform:translateX(3px)}
.footer-bottom{margin-top:36px;padding-top:18px;border-top:1px solid rgba(255,255,255,.05);display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;font-size:12.5px;color:var(--muted)}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr}.footer-bottom{display:grid}}

.skip-link{position:fixed;top:-60px;left:20px;z-index:999;background:var(--cyan);color:#06121E;padding:10px 16px;border-radius:12px;font-weight:700;transition:top .2s}
.skip-link:focus{top:16px}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* roulang page: category3 */
:root {
    --bg: #070C16;
    --panel: #0D1530;
    --panel-2: #0A101C;
    --card: rgba(255, 255, 255, 0.045);
    --card-strong: rgba(255, 255, 255, 0.06);
    --line: rgba(255, 255, 255, 0.08);
    --cyan: #38D5FF;
    --indigo: #4B74FF;
    --amber: #FFC24D;
    --green: #3CE6AE;
    --text: #EAF2FF;
    --muted: #A6B6D3;
    --faint: #677B98;
    --radius-xl: 20px;
    --radius-md: 12px;
    --shadow-cyan: 0 0 28px rgba(47, 212, 255, 0.35);
    --font: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

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

  button,
  input,
  select {
    font: inherit;
    color: inherit;
    border: none;
  }

  button {
    cursor: pointer;
  }

  .drawer-backdrop {
    display: none;
  }

  .topbar {
    display: none;
  }

  .app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 248px;
    z-index: 60;
    background: rgba(10, 16, 31, 0.92);
    border-right: 1px solid rgba(255, 255, 255, 0.07);
    backdrop-filter: blur(20px);
    padding: 32px 18px 24px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
  }

  .sidebar-inner {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 0;
  }

  .brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 8px 26px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .logo-mark {
    position: relative;
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    border-radius: 14px;
    background: rgba(56, 213, 255, 0.1);
    border: 1px solid rgba(56, 213, 255, 0.3);
  }

  .logo-mark::before {
    content: "";
    position: absolute;
    width: 8px;
    height: 8px;
    top: 8px;
    left: 8px;
    background: var(--cyan);
    border-radius: 2px;
    box-shadow: 16px 0 0 rgba(56, 213, 255, 0.55), 0 18px 0 rgba(75, 116, 255, 0.9), 16px 18px 0 var(--cyan), 8px 9px 0 rgba(255, 255, 255, 0.18);
  }

  .logo-mark::after {
    content: "";
    position: absolute;
    right: 10px;
    bottom: 9px;
    width: 10px;
    height: 7px;
    background: linear-gradient(90deg, var(--amber), rgba(255, 194, 77, 0.1));
    border-radius: 2px;
  }

  .brand-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
  }

  .brand-text strong {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: 0.02em;
    line-height: 1.2;
  }

  .brand-text em {
    font-style: normal;
    font-size: 13px;
    color: var(--muted);
    margin-top: 2px;
    letter-spacing: 0.06em;
    white-space: nowrap;
  }

  .side-nav {
    margin-top: 28px;
    display: flex;
    flex-direction: column;
    gap: 7px;
    padding: 0 2px;
  }

  .nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 13px;
    border-radius: 12px;
    color: var(--muted);
    font-weight: 500;
    font-size: 15px;
    border: 1px solid transparent;
    transition: color .22s ease, background .22s ease, border-color .22s ease, box-shadow .22s ease;
  }

  .nav-item svg {
    width: 20px;
    height: 20px;
    flex: 0 0 auto;
    opacity: .8;
    transition: opacity .22s ease;
  }

  .nav-item:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
  }

  .nav-item:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 2px;
  }

  .nav-item.active {
    background: rgba(56, 213, 255, 0.1);
    border-color: rgba(56, 213, 255, 0.2);
    color: #fff;
    box-shadow: inset 3px 0 0 var(--cyan), 0 0 18px rgba(56, 213, 255, 0.08);
  }

  .nav-item.active svg {
    opacity: 1;
    color: var(--cyan);
  }

  .sidebar-status-card {
    margin-top: auto;
    background: rgba(255, 255, 255, 0.045);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 14px 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--muted);
    line-height: 1.4;
  }

  .pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: var(--cyan);
    box-shadow: 0 0 0 0 rgba(56, 213, 255, 0.5);
    animation: pulse-dot 2s ease-out infinite;
    flex: 0 0 auto;
  }

  @keyframes pulse-dot {
    0% {
      box-shadow: 0 0 0 0 rgba(56, 213, 255, 0.4);
    }
    70% {
      box-shadow: 0 0 0 9px rgba(56, 213, 255, 0);
    }
    100% {
      box-shadow: 0 0 0 0 rgba(56, 213, 255, 0);
    }
  }

  .sidebar-cta {
    margin-top: 14px;
    width: 100%;
  }

  .content-shell {
    margin-left: 248px;
    min-height: 100vh;
  }

  .page-wrap {
    max-width: 1180px;
    margin: 0 auto;
    padding: 48px 44px 96px;
  }

  .section {
    margin-top: 92px;
  }

  .glass {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(18px);
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    letter-spacing: 0.16em;
    color: var(--cyan);
    text-transform: uppercase;
  }

  .eyebrow::before {
    content: "";
    width: 18px;
    height: 1px;
    background: var(--cyan);
    box-shadow: 0 0 10px rgba(56, 213, 255, 0.6);
  }

  .section-title {
    font-size: 32px;
    line-height: 1.3;
    letter-spacing: -0.01em;
    font-weight: 800;
    margin-top: 12px;
  }

  .section-lead {
    color: var(--muted);
    max-width: 680px;
    margin-top: 12px;
  }

  .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--faint);
    margin-bottom: 44px;
  }

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

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

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: var(--radius-md);
    padding: 12px 22px;
    font-weight: 600;
    font-size: 15px;
    line-height: 1.5;
    transition: all .25s ease;
    position: relative;
  }

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

  .btn-primary {
    background: linear-gradient(135deg, #2FD4FF, #4B74FF);
    color: #fff;
    box-shadow: 0 0 20px rgba(47, 212, 255, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.25);
    border: none;
  }

  .btn-primary:hover {
    filter: brightness(1.15);
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(47, 212, 255, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 0 10px rgba(47, 212, 255, 0.2);
  }

  .btn-ghost {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: var(--text);
  }

  .btn-ghost:hover {
    border-color: rgba(56, 213, 255, 0.55);
    color: var(--cyan);
    background: rgba(56, 213, 255, 0.06);
    box-shadow: 0 0 22px rgba(56, 213, 255, 0.08);
  }

  .link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--cyan);
    font-weight: 600;
  }

  .link-arrow:hover {
    color: var(--text);
  }

  .pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 13px;
    border-radius: 999px;
    font-size: 13px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--muted);
  }

  .pill.has-amber {
    background: rgba(255, 194, 77, 0.08);
    border-color: rgba(255, 194, 77, 0.22);
    color: var(--amber);
  }

  .dot {
    width: 6px;
    height: 6px;
    border-radius: 999px;
  }

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

  .dot.amber {
    background: var(--amber);
  }

  .fake-palette {
    margin-top: 10px;
    color: var(--faint);
    font-size: 12px;
    letter-spacing: .02em;
  }

  /* hero */
  .hero {
    position: relative;
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(13, 21, 48, 0.98), rgba(7, 12, 22, 0.96)), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
    border: 1px solid rgba(255, 255, 255, 0.06);
    overflow: hidden;
    min-height: 520px;
  }

  .hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(520px 300px at 85% 10%, rgba(75, 116, 255, 0.13), transparent 65%), radial-gradient(400px 260px at 0% 85%, rgba(56, 213, 255, 0.08), transparent 65%);
    pointer-events: none;
  }

  .hero-wide {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 52px;
    align-items: center;
    padding: 58px 56px;
    position: relative;
    z-index: 2;
  }

  .hero-title {
    font-size: clamp(30px, 4vw, 46px);
    line-height: 1.17;
    letter-spacing: -0.02em;
    font-weight: 800;
    margin-top: 22px;
  }

  .hero-title span {
    color: transparent;
    background: linear-gradient(90deg, var(--cyan), #7EA0FF 60%, var(--indigo));
    -webkit-background-clip: text;
    background-clip: text;
    display: inline;
  }

  .hero-lead {
    color: var(--muted);
    font-size: 17px;
    max-width: 560px;
    margin-top: 18px;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
  }

  .hero-meta-list {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    padding: 0;
    list-style: none;
    margin-top: 34px;
  }

  .hero-meta-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-size: 14px;
  }

  .hero-panel {
    background: rgba(13, 21, 48, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 24px;
    padding: 18px;
    backdrop-filter: blur(18px);
  }

  .hero-panel-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 8px 14px;
    font-size: 13px;
    color: var(--muted);
  }

  .hero-panel-head span:first-child {
    letter-spacing: .08em;
  }

  .hero-panel-head span:last-child {
    color: var(--cyan);
  }

  .path-node {
    border: 1px solid rgba(255, 255, 255, 0.07);
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    padding: 14px 14px;
    position: relative;
    display: flex;
    align-items: center;
    gap: 14px;
  }

  .path-node:not(:last-child) {
    margin-bottom: 10px;
  }

  .path-node .node-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 9px;
    background: rgba(56, 213, 255, 0.1);
    border: 1px solid rgba(56, 213, 255, 0.2);
    color: var(--cyan);
    font-size: 13px;
    font-weight: 700;
  }

  .path-node .node-text strong {
    display: block;
    color: var(--text);
    font-size: 14px;
    font-weight: 600;
  }

  .path-node .node-text span {
    color: var(--faint);
    font-size: 12.5px;
  }

  .path-node:not(:last-child)::after {
    content: "";
    position: absolute;
    left: 29px;
    bottom: -11px;
    width: 1px;
    height: 12px;
    background: linear-gradient(180deg, rgba(56, 213, 255, 0.55), rgba(56, 213, 255, 0.05));
  }

  .path-caption {
    margin-top: 14px;
    color: var(--faint);
    font-size: 12px;
    text-align: right;
  }

  /* compare section */
  .compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  .compare-card {
    padding: 30px;
  }

  .compare-card.is-classic .path-list .path-item::before {
    background: rgba(255, 255, 255, 0.12);
    box-shadow: none;
  }

  .compare-card-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-size: 18px;
    font-weight: 700;
    padding-bottom: 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  }

  .tag-track {
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--faint);
  }

  .compare-card.is-guide .tag-track {
    color: var(--cyan);
    background: rgba(56, 213, 255, 0.08);
    border: 1px solid rgba(56, 213, 255, 0.2);
  }

  .path-list {
    list-style: none;
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .path-item {
    position: relative;
    padding-left: 34px;
    display: grid;
    gap: 4px;
  }

  .path-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 7px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.2);
  }

  .is-guide .path-item::before {
    background: var(--cyan);
    border-color: var(--cyan);
    box-shadow: 0 0 0 4px rgba(56, 213, 255, 0.12), 0 0 18px rgba(56, 213, 255, 0.5);
  }

  .path-item strong {
    font-weight: 600;
  }

  .path-item p {
    color: var(--faint);
    font-size: 14px;
    margin: 0;
  }

  .is-guide .path-item p {
    color: var(--muted);
  }

  .mock-note {
    color: rgba(103, 123, 152, 0.62);
    font-size: 12px;
    display: flex;
    justify-content: flex-end;
    margin-top: 14px;
  }

  /* step section */
  .step-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 34px;
    margin-top: 44px;
  }

  .step-card {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 20px;
    padding: 26px 20px 24px;
    position: relative;
    min-height: 280px;
    transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  }

  .step-card:hover {
    transform: translateY(-4px);
    border-color: rgba(56, 213, 255, 0.35);
    box-shadow: 0 10px 30px rgba(56, 213, 255, 0.06);
  }

  .step-card:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -30px;
    top: 80px;
    width: 27px;
    height: 2px;
    background: linear-gradient(90deg, rgba(56, 213, 255, 0.8), rgba(56, 213, 255, 0.08));
  }

  .step-no {
    position: absolute;
    top: 18px;
    right: 20px;
    font-size: 42px;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.05);
    line-height: 1;
  }

  .step-icon {
    box-sizing: content-box;
    width: 48px;
    height: 48px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(56, 213, 255, 0.08);
    border: 1px solid rgba(56, 213, 255, 0.22);
    margin-bottom: 18px;
  }

  .step-icon svg {
    width: 24px;
    height: 24px;
    color: var(--cyan);
  }

  .step-card h3 {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 10px;
  }

  .step-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.8;
    padding-right: 8px;
  }

  /* cover feature */
  .feature-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.07fr) .93fr;
    gap: 34px;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    overflow: hidden;
  }

  .feature-media {
    min-height: 260px;
    overflow: hidden;
    position: relative;
  }

  .feature-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    inset: 0;
  }

  .feature-info {
    padding: 38px 34px 38px 0;
  }

  .feature-info h3 {
    font-size: 24px;
    font-weight: 800;
    margin-top: 10px;
    line-height: 1.4;
  }

  .feature-info p {
    color: var(--muted);
    margin-top: 14px;
    font-size: 15px;
  }

  .feature-feature-list {
    list-style: none;
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .feature-feature-list li {
    position: relative;
    padding-left: 22px;
    color: var(--text);
    font-size: 14px;
  }

  .feature-feature-list li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 9px;
    width: 6px;
    height: 6px;
    background: var(--cyan);
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(56, 213, 255, 0.8);
  }

  /* cross section */
  .platform-cards {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 28px;
  }

  .cross-card {
    padding: 30px;
    transition: transform .25s ease, border-color .25s ease;
  }

  .cross-card:hover {
    transform: translateY(-4px);
    border-color: rgba(56, 213, 255, 0.35);
  }

  .cross-kicker {
    font-size: 13px;
    color: var(--cyan);
    letter-spacing: .05em;
    margin-bottom: 12px;
  }

  .cross-card h3 {
    font-size: 22px;
    font-weight: 800;
    line-height: 1.4;
    margin-bottom: 10px;
  }

  .cross-card p {
    color: var(--muted);
    font-size: 14px;
  }

  .cross-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
    margin-top: 20px;
  }

  .cross-list li {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 13.5px;
    color: var(--muted);
  }

  .cross-list li .mini-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--indigo);
  }

  .cross-actions {
    margin-top: 24px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
  }

  .cross-badge-link {
    display: inline-flex;
    align-items: center;
    padding: 7px 18px 7px 8px;
    border-radius: 999px;
    background: rgba(13, 21, 48, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--muted);
    font-size: 14px;
    gap: 9px;
  }

  .cross-badge-link .mini-icon {
    width: 28px;
    height: 28px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(56, 213, 255, 0.12);
    color: var(--cyan);
  }

  .mini-icon svg {
    width: 15px;
    height: 15px;
  }

  .cover-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--cyan);
    font-weight: 600;
    font-size: 15px;
  }

  /* latest update */
  .latest-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 34px;
    align-items: start;
  }

  .latest-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
  }

  .latest-row {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 19px 20px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.07);
    transition: border-color .25s ease, background .25s ease;
  }

  .latest-row:hover {
    background: rgba(56, 213, 255, 0.05);
    border-color: rgba(56, 213, 255, 0.22);
  }

  .latest-row time {
    flex: 0 0 auto;
    padding: 5px 13px;
    border-radius: 999px;
    font-size: 13px;
    background: rgba(255, 194, 77, 0.08);
    color: var(--amber);
    border: 1px solid rgba(255, 194, 77, 0.20);
    font-variant-numeric: tabular-nums;
  }

  .latest-row-content {
    flex: 1;
    min-width: 0;
  }

  .latest-row-content strong {
    display: block;
    font-weight: 600;
    margin-bottom: 2px;
  }

  .latest-row-content span {
    display: block;
    color: var(--faint);
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .ref-card-solid {
    background: var(--panel);
    border-radius: 20px;
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.08);
  }

  .ref-num {
    font-size: 34px;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1;
    color: var(--cyan);
    font-variant-numeric: tabular-nums;
  }

  .ref-desc {
    margin-top: 10px;
    color: var(--muted);
    font-size: 14px;
  }

  .ref-desc strong {
    color: var(--text);
  }

  /* faq */
  .faq-box {
    max-width: 860px;
    margin-top: 34px;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .faq-item {
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0 20px;
    transition: border-color .25s ease;
  }

  .faq-item[open] {
    border-color: rgba(56, 213, 255, 0.28);
  }

  .faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: center;
    padding: 17px 0;
    font-weight: 600;
    color: var(--text);
  }

  .faq-item summary::-webkit-details-marker {
    display: none;
  }

  .faq-item summary .faq-toggle {
    width: 22px;
    height: 22px;
    border-radius: 7px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .25s ease;
    flex: 0 0 auto;
  }

  .faq-item summary .faq-toggle svg {
    width: 12px;
    height: 12px;
    transform: rotate(0deg);
    transition: transform .3s ease;
    color: var(--muted);
  }

  .faq-item[open] summary .faq-toggle {
    border-color: rgba(56, 213, 255, 0.45);
    background: rgba(56, 213, 255, 0.1);
  }

  .faq-item[open] summary .faq-toggle svg {
    transform: rotate(45deg);
    color: var(--cyan);
  }

  .faq-answer {
    padding: 2px 0 22px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.85;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 18px;
  }

  /* CTA */
  .cta-block {
    border-radius: 28px;
    padding: 52px 50px;
    background: linear-gradient(135deg, rgba(13, 21, 48, 0.97), rgba(7, 12, 22, 0.98)), radial-gradient(680px 300px at 90% 10%, rgba(75, 116, 255, 0.18), transparent 70%), url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.09);
  }

  .cta-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 52px;
    align-items: center;
  }

  .cta-title {
    font-size: 28px;
    font-weight: 800;
    line-height: 1.35;
    margin-top: 8px;
  }

  .cta-text {
    margin-top: 14px;
    color: var(--muted);
    font-size: 15px;
  }

  .cta-list {
    list-style: none;
    margin-top: 22px;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .cta-list li {
    display: flex;
    gap: 12px;
    color: var(--muted);
    font-size: 14px;
  }

  .cta-list li::before {
    content: "";
    flex: 0 0 auto;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green);
    margin-top: 9px;
  }

  .feedback-form {
    padding: 30px;
    background: rgba(7, 12, 22, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    backdrop-filter: blur(18px);
  }

  .feedback-form .input-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

  .form-label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 6px;
  }

  .form-label input,
  .form-label select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 14px;
    color: var(--text);
    transition: border-color .2s ease, box-shadow .2s ease;
  }

  .form-label input::placeholder {
    color: var(--faint);
  }

  .form-label input:focus,
  .form-label select:focus {
    outline: none;
    border-color: rgba(56, 213, 255, 0.5);
    box-shadow: 0 0 0 3px rgba(56, 213, 255, 0.1);
  }

  .form-label input.has-error {
    border-color: rgba(255, 99, 99, 0.55);
  }

  .form-error-msg {
    color: rgba(255, 118, 118, 0.75);
    font-size: 12px;
    min-height: 18px;
    padding-top: 6px;
  }

  .form-success-msg {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: 10px;
    background: rgba(60, 230, 174, 0.08);
    border: 1px solid rgba(60, 230, 174, 0.20);
    color: var(--green);
    display: none;
    font-size: 13px;
  }

  .form-btn-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 14px;
  }

  /* footer */
  .site-footer {
    margin-left: 248px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(10, 16, 31, 0.6);
  }

  .site-footer .container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 54px 44px 32px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 60px;
  }

  .footer-brand p {
    color: var(--faint);
    font-size: 14px;
    max-width: 360px;
    margin-top: 14px;
  }

  .footer-brand .brand-name {
    display: flex;
    align-items: baseline;
    gap: 6px;
  }

  .footer-brand .brand-name strong {
    font-size: 21px;
    font-weight: 800;
  }

  .footer-brand .brand-name span {
    color: var(--muted);
    font-size: 14px;
    letter-spacing: .05em;
  }

  .footer-links h4 {
    font-size: 15px;
    color: var(--text);
    margin-bottom: 18px;
    font-weight: 700;
  }

  .footer-links a {
    display: block;
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 11px;
    transition: color .2s ease;
    width: fit-content;
  }

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

  .footer-bottom {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    justify-content: space-between;
    gap: 30px;
    flex-wrap: wrap;
    color: var(--faint);
    font-size: 13px;
  }

  .footer-bottom p:last-child {
    text-align: right;
    color: rgba(103, 123, 152, 0.6);
  }

  /* responsive */
  @media (max-width: 1279px) {
    .app-sidebar {
      width: 228px;
    }

    .content-shell,
    .site-footer {
      margin-left: 228px;
    }

    .page-wrap {
      padding: 44px 30px 84px;
    }

    .hero-wide {
      padding: 50px 42px;
    }
  }

  @media (min-width: 1024px) {
    .app-sidebar .brand-logo,
    .app-sidebar .side-nav {
      padding-left: 4px;
      padding-right: 4px;
    }
  }

  @media (max-width: 1023.98px) {
    .topbar {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 80;
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 18px;
      background: rgba(7, 12, 22, 0.9);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    }

    .topbar-brand {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .topbar-brand .logo-mark {
      width: 34px;
      height: 34px;
      flex-basis: 34px;
      border-radius: 10px;
    }

    .topbar-brand .logo-mark::before {
      width: 6px;
      height: 6px;
      top: 6px;
      left: 6px;
      box-shadow: 12px 0 0 rgba(56, 213, 255, 0.55), 0 14px 0 rgba(75, 116, 255, 0.9), 12px 14px 0 var(--cyan), 6px 7px 0 rgba(255, 255, 255, 0.18);
    }

    .topbar-brand .logo-mark::after {
      right: 6px;
      bottom: 5px;
      width: 8px;
      height: 5px;
    }

    .topbar-brand .topbar-name strong {
      display: block;
      font-size: 16px;
      line-height: 1.2;
    }

    .topbar-brand .topbar-name span {
      font-size: 12px;
      color: var(--muted);
    }

    .menu-toggle {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 10px;
      width: 42px;
      height: 42px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text);
      transition: all .2s ease;
    }

    .menu-toggle:hover {
      border-color: rgba(56, 213, 255, 0.5);
    }

    .menu-toggle:focus-visible {
      outline: 2px solid var(--cyan);
      outline-offset: 2px;
    }

    .menu-toggle svg {
      width: 20px;
      height: 20px;
    }

    .app-sidebar {
      width: 300px;
      transform: translateX(-105%);
      transition: transform .32s ease;
      box-shadow: 20px 0 50px rgba(0, 0, 0, 0.4);
      background: rgba(8, 13, 24, 0.98);
    }

    .app-sidebar.nav-open {
      transform: translateX(0);
    }

    .drawer-backdrop {
      display: block;
      position: fixed;
      inset: 0;
      z-index: 55;
      background: rgba(0, 0, 0, 0.55);
      backdrop-filter: blur(3px);
      opacity: 0;
      visibility: hidden;
      transition: opacity .3s ease, visibility .3s ease;
    }

    .drawer-backdrop.show {
      opacity: 1;
      visibility: visible;
    }

    body.no-scroll {
      overflow: hidden;
    }

    .content-shell,
    .site-footer {
      margin-left: 0;
      padding-top: 0;
    }

    .page-wrap {
      padding: 40px 30px 78px;
    }

    .site-footer .container {
      padding: 42px 30px 30px;
    }

    .hero-wide {
      grid-template-columns: 1fr;
      gap: 36px;
      padding: 44px 32px;
    }

    .hero {
      min-height: auto;
    }

    .compare-grid,
    .latest-wrap,
    .cta-grid,
    .platform-cards {
      grid-template-columns: 1fr;
    }

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

    .feature-info {
      padding: 28px 28px 32px;
    }

    .feature-media {
      min-height: 200px;
      position: relative;
    }

    .category-footer .footer-grid,
    .site-footer .footer-grid {
      grid-template-columns: 1fr 1fr;
    }

    .step-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .step-card:not(:last-child)::after {
      display: none;
    }
  }

  @media (max-width: 639px) {
    .page-wrap {
      padding: 32px 18px 60px;
    }

    .site-footer .container {
      padding: 40px 20px 28px;
    }

    .hero-wide {
      padding: 36px 22px 42px;
    }

    .hero-title {
      font-size: 29px;
    }

    .hero-actions,
    .form-btn-group {
      flex-direction: column;
    }

    .hero-actions .btn,
    .form-btn-group .btn {
      width: 100%;
    }

    .section {
      margin-top: 64px;
    }

    .section-title {
      font-size: 26px;
    }

    .compare-card {
      padding: 22px;
    }

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

    .cta-block {
      padding: 28px 20px;
    }

    .feedback-form .input-grid {
      grid-template-columns: 1fr;
    }

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

    .footer-bottom {
      flex-direction: column;
      gap: 4px;
    }

    .footer-bottom p:last-child {
      text-align: left;
    }

    .cross-card {
      padding: 22px;
    }

    .feedback-form {
      width: 100%;
    }
  }

/* roulang page: category4 */
:root {
    --bg: #070C16;
    --panel: #0D1530;
    --line: rgba(255,255,255,0.08);
    --primary: #38D5FF;
    --indigo: #4B74FF;
    --amber: #FFC24D;
    --green: #3CE6AE;
    --text: #EAF2FF;
    --muted: #A6B6D3;
    --weak: #677B98;
    --radius-lg: 20px;
    --radius-md: 12px;
    --radius-pill: 999px;
    --ease: cubic-bezier(.22, .61, .36, 1);
    --shadow-primary: 0 0 28px rgba(47, 212, 255, .25);
  }

  * {
    box-sizing: border-box;
  }
  html {
    scroll-behavior: smooth;
  }
  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
    font-size: 15px;
    line-height: 1.8;
    min-height: 100vh;
  }
  img {
    max-width: 100%;
    display: block;
  }
  a {
    color: inherit;
    text-decoration: none;
  }
  button,
  input,
  select,
  textarea {
    font-family: inherit;
  }

  .container {
    max-width: 1180px;
    margin-inline: auto;
    padding-inline: 24px;
  }

  .app-shell {
    display: flex;
    min-height: 100vh;
  }

  /* Sidebar */
  .sidebar {
    width: 248px;
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 60;
    display: flex;
    flex-direction: column;
    padding: 28px 18px 24px;
    background: rgba(3, 9, 20, 0.82);
    border-right: 1px solid rgba(255,255,255,0.06);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
  }
  .side-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 8px 22px;
    border-bottom: 1px solid rgba(255,255,255,0.07);
    margin-bottom: 18px;
  }
  .logo-mark {
    position: relative;
    display: inline-flex;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(47,212,255,.25), rgba(75,116,255,.35));
    border: 1px solid rgba(56,213,255,.5);
    box-shadow: 0 0 18px rgba(56,213,255,.28);
    flex-shrink: 0;
  }
  .logo-mark::before,
  .logo-mark::after {
    content: "";
    position: absolute;
    left: 8px;
    width: 16px;
    height: 2px;
    background: rgba(234,242,255,.85);
    border-radius: 99px;
  }
  .logo-mark::before {
    top: 12px;
    box-shadow: 0 6px 0 -0.5px rgba(56,213,255,.55);
  }
  .logo-mark::after {
    top: 21px;
    width: 10px;
    background: rgba(56,213,255,.8);
  }
  .brand-name {
    display: flex;
    flex-direction: column;
    line-height: 1.28;
  }
  .brand-name strong {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: .02em;
    color: var(--text);
  }
  .brand-name span {
    font-size: 13px;
    font-weight: 500;
    color: var(--muted);
  }

  .side-nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
  }
  .nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 12px;
    border-radius: var(--radius-md);
    border-left: 2px solid transparent;
    color: var(--muted);
    font-size: 14px;
    font-weight: 500;
    line-height: 1;
    transition: all .25s var(--ease);
  }
  .nav-item svg {
    width: 19px;
    height: 19px;
    flex-shrink: 0;
    transition: color .25s var(--ease);
  }
  .nav-item:hover {
    color: var(--text);
    background: rgba(255,255,255,0.04);
  }
  .nav-item.active {
    color: var(--primary);
    background: linear-gradient(90deg, rgba(56,213,255,.14), rgba(56,213,255,.03));
    border-left-color: var(--primary);
    box-shadow: inset 0 0 20px rgba(56,213,255,.05);
  }
  .nav-item.active svg {
    color: var(--primary);
    filter: drop-shadow(0 0 6px rgba(56,213,255,.65));
  }

  .side-status {
    margin-top: auto;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,.06);
  }
  .status-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--weak);
    padding: 8px 12px;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.06);
    border-radius: var(--radius-pill);
    margin-bottom: 14px;
    white-space: nowrap;
  }
  .status-pill .dot-pulse {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 0 0 rgba(60,230,174,.55);
    animation: pulse 2s infinite;
  }
  @keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(60,230,174,.4); }
    70% { box-shadow: 0 0 0 6px rgba(60,230,174,0); }
    100% { box-shadow: 0 0 0 0 rgba(60,230,174,0); }
  }
  .side-cta {
    width: 100%;
  }

  .topbar {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    height: 60px;
    padding: 0 16px;
    align-items: center;
    justify-content: space-between;
    background: rgba(7, 12, 22, .86);
    border-bottom: 1px solid rgba(255,255,255,.06);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }
  .topbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .menu-burger {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,.1);
    background: rgba(255,255,255,.04);
    color: var(--text);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all .2s var(--ease);
  }
  .menu-burger:hover {
    border-color: rgba(56,213,255,.45);
  }
  .menu-burger:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
  }
  .sidebar-backdrop {
    display: none;
  }

  .main-area {
    flex: 1;
    min-width: 0;
    margin-left: 248px;
  }

  /* Buttons */
  .btn-primary,
  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    transition: all .25s var(--ease);
  }
  .btn-primary {
    background: linear-gradient(135deg, #2FD4FF, #4B74FF);
    color: #fff;
    border: none;
    box-shadow: var(--shadow-primary);
  }
  .btn-primary:hover {
    filter: brightness(1.15);
    transform: translateY(-2px);
  }
  .btn-primary:active {
    transform: translateY(0);
    filter: brightness(.95);
    box-shadow: none;
  }
  .btn-ghost {
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.16);
    color: var(--text);
    backdrop-filter: blur(8px);
  }
  .btn-ghost:hover {
    border-color: rgba(56,213,255,.55);
    color: var(--primary);
    background: rgba(56,213,255,.05);
    box-shadow: 0 0 18px rgba(56,213,255,.1);
  }
  .btn-primary:focus-visible,
  .btn-ghost:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 3px;
  }

  /* Page Hero */
  .page-hero {
    position: relative;
    overflow: hidden;
    padding: 84px 0 64px;
    background-size: cover;
    background-position: center;
  }
  .page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
      radial-gradient(circle at 82% 18%, rgba(75,116,255,.3), transparent 32%),
      linear-gradient(180deg, rgba(7,12,22,.72), rgba(7,12,22,.94));
    z-index: 0;
  }
  .page-hero .container {
    position: relative;
    z-index: 2;
  }
  .p-hero-content {
    max-width: 820px;
  }
  .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--weak);
    margin-bottom: 18px;
  }
  .breadcrumb a {
    color: var(--muted);
    transition: color .2s;
  }
  .breadcrumb a:hover {
    color: var(--primary);
  }
  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(56,213,255,.08);
    border: 1px solid rgba(56,213,255,.3);
    border-radius: var(--radius-pill);
    color: var(--primary);
    font-size: 13px;
    margin-bottom: 20px;
  }
  .page-hero h1 {
    font-size: clamp(30px, 4vw, 44px);
    line-height: 1.22;
    font-weight: 800;
    letter-spacing: -0.01em;
    margin: 0 0 16px;
  }
  .page-hero p {
    color: var(--muted);
    font-size: 16px;
    max-width: 680px;
    margin: 0 0 28px;
  }
  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
  }
  .update-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--amber);
    font-size: 13px;
    margin-top: 26px;
    padding: 6px 14px;
    border: 1px solid rgba(255,194,77,.25);
    border-radius: var(--radius-pill);
    background: rgba(255,194,77,.05);
    width: fit-content;
  }

  /* Section base */
  .section {
    padding: 72px 0;
    position: relative;
  }
  .section-sm {
    padding: 44px 0 0;
  }
  .section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 42px;
  }
  .section-head h2 {
    font-size: clamp(24px, 3vw, 34px);
    line-height: 1.3;
    font-weight: 700;
    margin: 0 0 12px;
    letter-spacing: -0.02em;
  }
  .section-head p {
    color: var(--muted);
    font-size: 15px;
    margin: 0;
  }

  .glass-card {
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
  }
  .hover-lift:hover {
    transform: translateY(-4px);
    border-color: rgba(56,213,255,.4);
    box-shadow: 0 12px 40px rgba(0,0,0,.3), 0 0 18px rgba(56,213,255,.12);
  }

  .block-title {
    font-size: 12px;
    letter-spacing: .08em;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .block-title::before {
    content: "";
    width: 14px;
    height: 2px;
    background: var(--primary);
    border-radius: 99px;
    box-shadow: 0 0 10px rgba(56,213,255,.7);
  }

  .feature-wrap {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }
  .feature-card {
    padding: 28px 24px;
  }
  .feature-icon {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    background: rgba(56,213,255,.1);
    border: 1px solid rgba(56,213,255,.22);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
  }
  .feature-icon svg {
    width: 23px;
    height: 23px;
    stroke: var(--primary);
  }
  .feature-card h3 {
    font-size: 18px;
    margin: 0 0 8px;
    font-weight: 700;
  }
  .feature-card p {
    color: var(--muted);
    font-size: 14px;
    margin: 0;
    line-height: 1.8;
  }

  /* Knowledge split */
  .knowledge-layout {
    display: grid;
    grid-template-columns: 258px minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }
  .knowledge-rail {
    position: sticky;
    top: 24px;
    padding: 14px;
    border-radius: var(--radius-lg);
    background: rgba(255,255,255,.035);
    border: 1px solid rgba(255,255,255,.08);
  }
  .rail-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text);
    padding: 4px 8px 14px;
    margin-bottom: 8px;
    border-bottom: 1px solid rgba(255,255,255,.08);
  }
  .rail-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 12px;
    border-radius: 10px;
    color: var(--muted);
    font-size: 14px;
    transition: all .25s ease;
  }
  .rail-item span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255,255,255,.2);
    transition: background .2s;
  }
  .rail-item:hover {
    color: var(--text);
    background: rgba(255,255,255,.05);
  }
  .rail-item:hover span,
  .rail-item.rail-active span {
    background: var(--primary);
  }
  .rail-item.rail-active {
    color: var(--primary);
    background: rgba(56,213,255,.08);
  }
  .rail-cta {
    margin-top: 16px;
    padding: 14px 8px 4px;
    border-top: 1px solid rgba(255,255,255,.06);
    font-size: 13px;
    color: var(--weak);
  }

  .qa-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
  }
  .qa-card {
    padding: 24px 26px 22px;
  }
  .qa-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 10px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
  }
  .qa-card h3 svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    stroke: var(--primary);
    margin-top: 3px;
  }
  .qa-card p {
    color: var(--muted);
    font-size: 14px;
    margin: 0;
  }
  .qa-tag {
    display: inline-flex;
    padding: 3px 10px;
    border-radius: var(--radius-pill);
    font-size: 12px;
    color: var(--muted);
    border: 1px solid rgba(255,255,255,.08);
    background: rgba(255,255,255,.03);
    margin-bottom: 12px;
  }

  /* Steps */
  .steps-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0,1fr));
    gap: 20px;
  }
  .step-card {
    padding: 26px 22px;
    position: relative;
    overflow: hidden;
  }
  .step-number {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: 700;
    font-size: 16px;
    color: var(--primary);
    background: rgba(56,213,255,.12);
    border: 1px solid rgba(56,213,255,.35);
    box-shadow: 0 0 18px rgba(56,213,255,.12);
    margin-bottom: 16px;
    font-variant-numeric: tabular-nums;
  }
  .step-card h3 {
    font-size: 16px;
    font-weight: 700;
    margin: 0 0 8px;
  }
  .step-card p {
    color: var(--muted);
    margin: 0;
    font-size: 13px;
    line-height: 1.7;
  }
  .step-card::after {
    content: "";
    position: absolute;
    top: 46px;
    right: -28px;
    width: 80px;
    height: 1px;
    background: linear-gradient(90deg, rgba(56,213,255,.5), transparent);
  }
  .step-card:last-child::after {
    display: none;
  }

  /* Warn cards */
  .warn-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
  .warn-card {
    overflow: hidden;
  }
  .warn-thumb {
    height: 170px;
    background-size: cover;
    background-position: center;
    position: relative;
  }
  .warn-thumb::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(7,12,22,.05), rgba(7,12,22,.82));
  }
  .warn-body {
    padding: 24px;
  }
  .warn-body h3 {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 10px;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .warn-body h3 svg {
    width: 20px;
    height: 20px;
    stroke: var(--amber);
  }
  .warn-body p {
    color: var(--muted);
    margin: 0;
    font-size: 14px;
  }

  /* Link-out cards */
  .linkout-wrap {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
  .linkout-card {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  .linkout-card h3 {
    font-size: 17px;
    margin: 0;
    font-weight: 700;
  }
  .linkout-card p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    flex: 1;
  }
  .text-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 600;
    font-size: 13px;
    transition: gap .2s ease;
  }
  .text-link:hover {
    gap: 10px;
  }

  /* CTA banner */
  .cta-panel {
    position: relative;
    overflow: hidden;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(47,212,255,.12), rgba(75,116,255,.12));
    border: 1px solid rgba(56,213,255,.24);
    padding: 44px 48px;
    text-align: center;
    backdrop-filter: blur(12px);
  }
  .cta-panel::before {
    content: "";
    position: absolute;
    width: 320px;
    height: 320px;
    left: -100px;
    top: -100px;
    background: rgba(56,213,255,.12);
    filter: blur(90px);
    border-radius: 50%;
  }
  .cta-panel h2 {
    font-size: clamp(22px, 2.4vw, 30px);
    font-weight: 800;
    margin: 0 0 10px;
  }
  .cta-panel p {
    max-width: 620px;
    margin: 0 auto 26px;
    color: var(--muted);
    font-size: 15px;
  }
  .cta-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 14px;
  }

  /* Background decor */
  .decor-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 0;
    pointer-events: none;
  }
  .bg-glow-one {
    width: 260px;
    height: 260px;
    background: rgba(47,212,255,.08);
    top: -40px;
    left: -30px;
  }
  .bg-glow-two {
    width: 340px;
    height: 340px;
    background: rgba(75,116,255,.1);
    bottom: 0;
    right: -100px;
  }
  .relative-wrap {
    position: relative;
  }

  /* Footer */
  .site-footer {
    background: rgba(3, 7, 16, .8);
    border-top: 1px solid rgba(255,255,255,.06);
    padding: 56px 0 28px;
    margin-top: auto;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 36px;
  }
  .footer-brand p {
    font-size: 14px;
    color: var(--weak);
    margin: 12px 0 0;
    max-width: 360px;
  }
  .footer-links h4 {
    font-size: 14px;
    color: var(--text);
    margin: 0 0 16px;
    font-weight: 700;
  }
  .footer-links a {
    display: block;
    padding: 5px 0;
    color: var(--muted);
    font-size: 14px;
    transition: color .2s ease;
  }
  .footer-links a:hover {
    color: var(--primary);
  }
  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,.06);
    padding-top: 24px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 10px;
    color: var(--weak);
    font-size: 13px;
  }
  .footer-bottom p {
    margin: 0;
  }

  /* Responsive */
  @media (max-width: 1279px) {
    .sidebar {
      width: 220px;
    }
    .main-area {
      margin-left: 220px;
    }
    .steps-grid {
      grid-template-columns: repeat(2, minmax(0,1fr));
    }
    .step-card::after {
      display: none;
    }
    .knowledge-layout {
      grid-template-columns: 220px minmax(0,1fr);
    }
  }

  @media (max-width: 1023px) {
    .sidebar {
      width: 300px;
      transform: translateX(-100%);
      transition: transform .35s var(--ease);
      padding-top: 20px;
    }
    .app-shell.sidebar-open .sidebar {
      transform: translateX(0);
    }
    .topbar {
      display: flex;
    }
    .main-area {
      margin-left: 0;
      padding-top: 60px;
    }
    .sidebar-backdrop {
      position: fixed;
      inset: 0;
      background: rgba(2,6,12,.56);
      backdrop-filter: blur(4px);
      -webkit-backdrop-filter: blur(4px);
      z-index: 55;
      display: block;
      opacity: 0;
      pointer-events: none;
      transition: opacity .3s ease;
    }
    .app-shell.sidebar-open .sidebar-backdrop {
      opacity: 1;
      pointer-events: auto;
    }
    .side-nav {
      margin-top: 10px;
    }
    .feature-wrap,
    .linkout-wrap {
      grid-template-columns: 1fr;
    }
    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .warn-grid {
      grid-template-columns: 1fr;
    }
    .page-hero {
      padding: 60px 0 48px;
    }
    .section {
      padding: 56px 0;
    }
  }

  @media (max-width: 767px) {
    .container {
      padding-inline: 18px;
    }
    .knowledge-layout {
      grid-template-columns: 1fr;
    }
    .knowledge-rail {
      position: static;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      padding: 12px;
    }
    .rail-title {
      width: 100%;
    }
    .rail-item {
      font-size: 13px;
      padding: 7px 10px;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,.08);
    }
    .rail-cta {
      width: 100%;
      border-top: none;
      margin-top: 0;
      padding-top: 8px;
    }
    .steps-grid {
      grid-template-columns: 1fr;
    }
    .hero-actions .btn-primary,
    .hero-actions .btn-ghost,
    .cta-actions .btn-primary,
    .cta-actions .btn-ghost {
      width: 100%;
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 28px;
    }
    .section-head {
      text-align: left;
    }
    .section-head br {
      display: none;
    }
    .warn-body {
      padding: 18px;
    }
    .cta-panel {
      padding: 30px 22px;
    }
  }