/* roulang page: index */
:root{
  --bg:#050A18;
  --bg-deep:#020611;
  --glass:rgba(12,24,48,.68);
  --panel:#0B1730;
  --panel-2:#0E1D3A;
  --primary:#1E6BFF;
  --cyan:#00E5FF;
  --purple:#7C4DFF;
  --success:#22C55E;
  --warning:#F59E0B;
  --text:#EAF2FF;
  --muted:#9FB2D4;
  --line:rgba(255,255,255,.12);
  --line-strong:rgba(0,229,255,.38);
  --radius-lg:24px;
  --radius:18px;
  --radius-sm:12px;
  --pill:999px;
  --shadow:0 12px 40px rgba(0,0,0,.35);
  --glow:0 0 28px rgba(0,229,255,.28);
  --glow-strong:0 0 42px rgba(0,229,255,.45);
  --section-gap:clamp(56px,8vw,120px);
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background-color:var(--bg);
  background-image:
    radial-gradient(900px 520px at 10% 4%, rgba(0,229,255,.10), transparent 62%),
    radial-gradient(820px 560px at 92% 2%, rgba(124,77,255,.13), transparent 64%),
    linear-gradient(180deg,#050A18 0%,#020611 100%);
  background-attachment:fixed;
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 20%,rgba(0,0,0,.9),transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 20%,rgba(0,0,0,.9),transparent 78%);
}
h1,h2,h3,h4,h5{margin:0 0 .6em;color:var(--text);font-weight:700;line-height:1.24;letter-spacing:.2px;}
h1{font-size:clamp(32px,5vw,56px);}
h2{font-size:clamp(26px,3vw,40px);font-weight:700;}
h3{font-size:clamp(19px,2vw,25px);font-weight:600;}
p{margin:0 0 1em;color:var(--muted);}
a{color:var(--cyan);text-decoration:none;transition:color .22s ease,opacity .22s ease;}
a:hover,a:focus{color:#7CF6FF;}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-sm);}
ul,ol{margin:0 0 1em;padding-left:1.2em;color:var(--muted);}
li{margin-bottom:.4em;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}

.grid-container{max-width:var(--container);margin:0 auto;padding-left:clamp(18px,3vw,32px);padding-right:clamp(18px,3vw,32px);}
.section{position:relative;z-index:1;padding:var(--section-gap) 0;}
.section--tight{padding:clamp(40px,5vw,72px) 0;}
.section-head{max-width:820px;margin:0 auto clamp(34px,4vw,56px);text-align:center;}
.section-head--left{margin-left:0;text-align:left;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;border-radius:var(--pill);
  background:rgba(0,229,255,.08);
  border:1px solid rgba(0,229,255,.28);
  color:var(--cyan);font-size:13px;font-weight:600;letter-spacing:.6px;
  margin-bottom:18px;
}
.eyebrow i{font-size:12px;}
.section-head p{font-size:17px;line-height:1.85;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 30px;border-radius:var(--pill);
  font-size:16px;font-weight:600;line-height:1;letter-spacing:.3px;
  border:1px solid transparent;cursor:pointer;
  transition:transform .22s ease,box-shadow .28s ease,background .28s ease,border-color .28s ease,color .22s ease;
  min-height:46px;text-align:center;
}
.btn-primary{
  background:linear-gradient(120deg,var(--primary) 0%,var(--cyan) 100%);
  color:#03101F;font-weight:700;
  box-shadow:0 0 26px rgba(0,229,255,.32),0 10px 26px rgba(30,107,255,.28);
}
.btn-primary:hover,.btn-primary:focus{
  color:#03101F;
  transform:translateY(-1px);
  box-shadow:0 0 42px rgba(0,229,255,.55),0 14px 30px rgba(30,107,255,.35);
}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 18px rgba(0,229,255,.3);}
.btn-ghost{
  background:rgba(255,255,255,.05);
  border-color:var(--line);
  color:var(--text);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.btn-ghost:hover,.btn-ghost:focus{
  color:var(--cyan);
  border-color:var(--line-strong);
  box-shadow:0 0 24px rgba(0,229,255,.2);
  transform:translateY(-1px);
}
.btn-sm{padding:10px 22px;font-size:14px;min-height:40px;}
.btn-block{width:100%;}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--pill);
  font-size:12px;font-weight:600;letter-spacing:.4px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(0,229,255,.3);
  color:#9BE9FF;
}
.badge--purple{border-color:rgba(124,77,255,.45);color:#C4B0FF;background:rgba(124,77,255,.1);}
.badge--warn{border-color:rgba(245,158,11,.4);color:#FFD28A;background:rgba(245,158,11,.1);}
.badge--ok{border-color:rgba(34,197,94,.4);color:#8CF0B4;background:rgba(34,197,94,.1);}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,10,24,.72);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.site-header.scrolled{background:rgba(5,10,24,.92);box-shadow:0 10px 32px rgba(0,0,0,.42);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:74px;}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary),var(--cyan));
  color:#03101F;font-weight:800;font-size:19px;
  box-shadow:0 0 22px rgba(0,229,255,.35);
}
.brand-text{font-size:19px;font-weight:700;color:#fff;letter-spacing:.4px;white-space:nowrap;}
.brand-text em{font-style:normal;color:var(--cyan);}
.main-nav{display:flex;align-items:center;gap:clamp(6px,1.6vw,22px);}
.nav-link{
  position:relative;padding:8px 2px;
  font-size:15px;font-weight:500;color:var(--muted);
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-2px;
  width:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--purple));
  transform:translateX(-50%);
  transition:width .26s ease;
  box-shadow:0 0 12px rgba(0,229,255,.7);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{width:70%;}
.nav-link.is-active{color:#fff;font-weight:600;}
.nav-link.is-active::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);
  color:var(--text);font-size:18px;cursor:pointer;align-items:center;justify-content:center;
  transition:border-color .22s ease,color .22s ease;
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--cyan);}
.mobile-drawer{
  display:none;
  position:fixed;top:74px;right:0;bottom:0;
  width:min(86vw,340px);
  background:rgba(6,13,30,.97);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-left:1px solid var(--line);
  padding:26px 22px 40px;
  z-index:70;
  transform:translateX(105%);
  transition:transform .32s cubic-bezier(.4,0,.2,1);
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0);}
.mobile-drawer a{
  display:block;padding:15px 14px;border-radius:14px;
  font-size:16px;color:var(--text);font-weight:500;
  border:1px solid transparent;
}
.mobile-drawer a:hover,.mobile-drawer a.is-active{
  background:rgba(0,229,255,.08);border-color:rgba(0,229,255,.26);color:#fff;
}
.mobile-drawer .drawer-cta{margin-top:20px;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:clamp(520px,72vh,680px);
  display:flex;align-items:center;
  padding:clamp(56px,8vw,96px) 0;
  background-image:
    linear-gradient(115deg,rgba(2,6,17,.94) 0%,rgba(5,10,24,.82) 45%,rgba(6,16,38,.72) 100%),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(0,229,255,.05) 1px,transparent 1px);
  background-size:100% 6px;
  opacity:.5;
}
.hero .grid-container{position:relative;z-index:2;width:100%;}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:clamp(28px,4vw,56px);align-items:center;}
.hero h1{margin-bottom:20px;}
.hero h1 span{
  background:linear-gradient(100deg,#FFFFFF 10%,var(--cyan) 55%,var(--purple) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:clamp(16px,1.4vw,19px);line-height:1.85;color:#B9C9E6;max-width:600px;margin-bottom:30px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:32px;}
.hero-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(22px,2.4vw,32px);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow);
}
.hero-card h3{font-size:19px;margin-bottom:6px;}
.hero-card .hero-card-sub{font-size:13px;color:var(--muted);margin-bottom:20px;}
.hero-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-bottom:22px;}
.hero-stat{
  padding:14px 16px;border-radius:14px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
}
.hero-stat b{display:block;font-size:22px;font-weight:700;color:#fff;font-variant-numeric:tabular-nums;}
.hero-stat span{font-size:12.5px;color:var(--muted);}
.hero-perks{list-style:none;padding:0;margin:0 0 22px;}
.hero-perks li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14.5px;color:#C6D5EE;margin-bottom:11px;
}
.hero-perks i{color:var(--cyan);margin-top:5px;font-size:13px;}

/* ---------- Trust strip ---------- */
.trust-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(14px,2vw,22px);
  margin-top:-42px;position:relative;z-index:3;
}
.trust-item{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px 20px;
  transition:border-color .26s ease,transform .26s ease,box-shadow .26s ease;
}
.trust-item:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:0 0 26px rgba(0,229,255,.14);}
.trust-item i{color:var(--cyan);font-size:20px;margin-bottom:12px;display:block;}
.trust-item h3{font-size:16.5px;margin-bottom:6px;}
.trust-item p{font-size:13.6px;margin:0;line-height:1.7;}

/* ---------- Ladder ---------- */
.ladder{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:clamp(16px,2vw,24px);position:relative;
}
.ladder::before{
  content:"";position:absolute;top:34px;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg,rgba(0,229,255,.15),rgba(0,229,255,.5),rgba(124,77,255,.5),rgba(0,229,255,.15));
  z-index:0;
}
.ladder-step{position:relative;z-index:1;display:flex;flex-direction:column;}
.ladder-node{
  width:68px;height:68px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:800;
  background:radial-gradient(circle at 32% 28%,rgba(0,229,255,.32),rgba(11,23,48,.96));
  border:1px solid rgba(0,229,255,.45);
  box-shadow:0 0 26px rgba(0,229,255,.3);
  color:#fff;margin-bottom:20px;font-variant-numeric:tabular-nums;
}
.ladder-step:nth-child(2) .ladder-node{border-color:rgba(30,107,255,.55);box-shadow:0 0 26px rgba(30,107,255,.34);}
.ladder-step:nth-child(3) .ladder-node{border-color:rgba(124,77,255,.55);box-shadow:0 0 26px rgba(124,77,255,.34);}
.ladder-step:nth-child(4) .ladder-node{border-color:rgba(245,158,11,.5);box-shadow:0 0 26px rgba(245,158,11,.3);}
.ladder-card{
  flex:1;display:flex;flex-direction:column;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 22px;
  transition:border-color .26s ease,transform .26s ease,box-shadow .26s ease;
}
.ladder-card:hover{border-color:var(--line-strong);transform:translateY(-4px);box-shadow:0 0 30px rgba(0,229,255,.16);}
.ladder-card h3{font-size:18px;margin-bottom:8px;}
.ladder-cond{
  font-size:12.6px;color:var(--cyan);letter-spacing:.3px;
  padding:5px 12px;border-radius:var(--pill);
  background:rgba(0,229,255,.08);border:1px solid rgba(0,229,255,.24);
  display:inline-block;margin-bottom:14px;
}
.ladder-card ul{list-style:none;padding:0;margin:0 0 18px;flex:1;}
.ladder-card li{display:flex;gap:9px;font-size:14px;color:#C2D2EC;margin-bottom:9px;line-height:1.6;}
.ladder-card li i{color:var(--cyan);font-size:12px;margin-top:6px;}
.ladder-card .btn{align-self:flex-start;}

/* ---------- Plans ---------- */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,2.2vw,28px);align-items:stretch;}
.plan-card{
  position:relative;display:flex;flex-direction:column;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(24px,2.6vw,34px);
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
}
.plan-card:hover{transform:translateY(-4px);border-color:var(--line-strong);}
.plan-card--featured{
  background:var(--glass);
  border-color:rgba(0,229,255,.5);
  box-shadow:0 0 40px rgba(0,229,255,.2),var(--shadow);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
.plan-flag{
  position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  padding:5px 18px;border-radius:var(--pill);
  background:linear-gradient(100deg,var(--primary),var(--cyan));
  color:#03101F;font-size:12.5px;font-weight:700;letter-spacing:.5px;white-space:nowrap;
}
.plan-card h3{font-size:20px;margin-bottom:6px;}
.plan-desc{font-size:13.6px;margin-bottom:20px;color:var(--muted);}
.plan-price{display:flex;align-items:baseline;gap:8px;margin-bottom:6px;}
.plan-price b{
  font-size:clamp(30px,3.4vw,40px);font-weight:800;color:#fff;
  font-variant-numeric:tabular-nums;letter-spacing:-.5px;
}
.plan-price span{font-size:14px;color:var(--muted);}
.plan-cycle{font-size:13px;color:var(--cyan);margin-bottom:22px;}
.plan-list{list-style:none;padding:0;margin:0 0 26px;flex:1;}
.plan-list li{display:flex;gap:10px;font-size:14.3px;color:#C6D5EE;margin-bottom:11px;line-height:1.6;}
.plan-list i{color:var(--success);font-size:13px;margin-top:5px;}
.plan-list i.off{color:#54648A;}

/* ---------- Flash bar ---------- */
.flash{
  position:relative;overflow:hidden;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  padding:clamp(24px,3vw,34px) clamp(22px,3vw,40px);
  border-radius:var(--radius-lg);
  background:linear-gradient(110deg,rgba(30,107,255,.22) 0%,rgba(0,229,255,.1) 45%,rgba(124,77,255,.2) 100%);
  border:1px solid rgba(0,229,255,.32);
  box-shadow:0 0 42px rgba(0,229,255,.16);
}
.flash::before{
  content:"";position:absolute;top:-60%;left:-10%;width:420px;height:420px;
  background:radial-gradient(circle,rgba(0,229,255,.3),transparent 68%);
  pointer-events:none;
}
.flash-left{position:relative;z-index:1;}
.flash-left h3{font-size:clamp(20px,2.2vw,27px);margin-bottom:8px;}
.flash-left p{margin:0;font-size:14.5px;}
.flash-right{position:relative;z-index:1;display:flex;align-items:center;gap:22px;flex-wrap:wrap;}
.countdown{display:flex;gap:10px;}
.countdown div{
  min-width:62px;padding:10px 6px;text-align:center;border-radius:14px;
  background:rgba(2,6,17,.6);border:1px solid var(--line);
}
.countdown b{display:block;font-size:22px;font-weight:700;color:var(--cyan);font-variant-numeric:tabular-nums;}
.countdown span{font-size:11.5px;color:var(--muted);}

/* ---------- Form ---------- */
.form-shell{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(24px,3vw,48px);align-items:start;
}
.form-side h2{margin-bottom:14px;}
.form-side p{font-size:15.5px;line-height:1.85;}
.form-side-list{list-style:none;padding:0;margin:22px 0 0;}
.form-side-list li{display:flex;gap:12px;font-size:14.6px;color:#C6D5EE;margin-bottom:14px;line-height:1.65;}
.form-side-list i{color:var(--cyan);margin-top:5px;}
.consult-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(24px,2.8vw,38px);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow);
}
.field{margin-bottom:20px;}
.field label{
  display:block;font-size:13.6px;font-weight:600;color:#C6D5EE;margin-bottom:8px;letter-spacing:.3px;
}
.field input,.field select,.field textarea{
  width:100%;padding:13px 16px;border-radius:var(--radius-sm);
  background:rgba(2,8,20,.72);
  border:1px solid var(--line);
  color:var(--text);font-size:15px;font-family:inherit;
  transition:border-color .24s ease,box-shadow .24s ease,background .24s ease;
  min-height:48px;
}
.field textarea{min-height:112px;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:#5F719A;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:rgba(0,229,255,.6);
  box-shadow:0 0 0 3px rgba(0,229,255,.12),0 0 22px rgba(0,229,255,.2);
  background:rgba(3,12,28,.9);
}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.check{display:flex;align-items:flex-start;gap:10px;font-size:13.2px;color:var(--muted);line-height:1.6;}
.check input{width:18px;height:18px;min-height:18px;margin-top:3px;accent-color:#00E5FF;flex-shrink:0;}
.form-status{
  margin-top:16px;font-size:14px;padding:12px 16px;border-radius:var(--radius-sm);display:none;
}
.form-status.is-error{display:block;background:rgba(245,158,11,.12);border:1px solid rgba(245,158,11,.4);color:#FFD28A;}
.form-status.is-success{display:block;background:rgba(34,197,94,.12);border:1px solid rgba(34,197,94,.42);color:#8CF0B4;}

/* ---------- News ---------- */
.news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(16px,2vw,24px);}
.news-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  transition:border-color .26s ease,transform .26s ease,box-shadow .26s ease;
}
.news-card:hover{border-color:var(--line-strong);transform:translateY(-4px);box-shadow:0 0 30px rgba(0,229,255,.16);}
.news-thumb{position:relative;overflow:hidden;aspect-ratio:16/10;border-radius:0;}
.news-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .45s ease;}
.news-card:hover .news-thumb img{transform:scale(1.04);}
.news-cat{
  position:absolute;top:12px;left:12px;
  padding:4px 12px;border-radius:var(--pill);font-size:11.5px;font-weight:600;
  background:rgba(2,8,20,.78);border:1px solid rgba(0,229,255,.36);color:#9BE9FF;
  backdrop-filter:blur(8px);
}
.news-body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1;}
.news-body h3{
  font-size:16.5px;line-height:1.5;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body h3 a{color:var(--text);}
.news-card:hover .news-body h3 a{color:var(--cyan);}
.news-body p{
  font-size:13.6px;line-height:1.7;margin-bottom:14px;flex:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{display:flex;align-items:center;justify-content:space-between;font-size:12.6px;color:#7E90B5;}
.news-foot a{font-weight:600;color:var(--cyan);}
.news-empty{
  grid-column:1/-1;text-align:center;padding:56px 24px;border-radius:var(--radius);
  background:var(--panel);border:1px dashed var(--line);color:var(--muted);font-size:15px;
}

/* ---------- FAQ ---------- */
.accordion{list-style:none;margin:0;padding:0;}
.accordion-item{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
  margin-bottom:14px;overflow:hidden;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:border-color .26s ease,box-shadow .26s ease;
}
.accordion-item.is-active,.accordion-item:hover{border-color:rgba(0,229,255,.4);box-shadow:0 0 24px rgba(0,229,255,.12);}
.accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;font-size:16.5px;font-weight:600;color:var(--text);
  cursor:pointer;line-height:1.5;
}
.accordion-title::before{display:none !important;}
.accordion-title i{color:var(--cyan);font-size:14px;transition:transform .3s ease;flex-shrink:0;}
.accordion-item.is-active .accordion-title i{transform:rotate(180deg);}
.accordion-content{padding:0 24px 22px;font-size:14.6px;color:var(--muted);line-height:1.85;}
.accordion-content p{margin:0;font-size:14.6px;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--radius-lg);
  padding:clamp(34px,4.4vw,64px) clamp(24px,4vw,56px);
  text-align:center;
  background-image:
    linear-gradient(120deg,rgba(2,6,17,.9),rgba(8,18,42,.78)),
    url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border:1px solid rgba(0,229,255,.26);
  box-shadow:0 0 46px rgba(30,107,255,.2);
}
.cta-band h2{max-width:760px;margin:0 auto 16px;}
.cta-band p{max-width:640px;margin:0 auto 28px;font-size:16px;}
.cta-band .btn-row{justify-content:center;}

/* ---------- Footer ---------- */
.site-footer{
  position:relative;z-index:1;
  margin-top:var(--section-gap);
  padding:clamp(48px,6vw,76px) 0 0;
  background:linear-gradient(180deg,rgba(3,8,20,.6),rgba(2,6,17,.98));
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:clamp(24px,3vw,44px);}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;letter-spacing:.4px;}
.footer-col p{font-size:13.6px;line-height:1.85;color:var(--muted);margin-bottom:14px;}
.footer-links{list-style:none;padding:0;margin:0;}
.footer-links li{margin-bottom:11px;}
.footer-links a{font-size:13.8px;color:var(--muted);}
.footer-links a:hover,.footer-links a:focus{color:var(--cyan);}
.footer-contact li{display:flex;gap:10px;font-size:13.8px;color:var(--muted);margin-bottom:12px;line-height:1.7;}
.footer-contact i{color:var(--cyan);margin-top:5px;font-size:13px;}
.footer-bottom{
  margin-top:clamp(34px,4vw,56px);
  padding:20px 0 26px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:12.8px;color:#7286AC;
}
.footer-bottom a{color:#7286AC;}
.footer-bottom a:hover{color:var(--cyan);}
.back-top{
  position:fixed;right:22px;bottom:26px;z-index:50;
  width:46px;height:46px;border-radius:50%;
  display:none;align-items:center;justify-content:center;
  background:rgba(12,24,48,.9);border:1px solid rgba(0,229,255,.35);
  color:var(--cyan);cursor:pointer;
  backdrop-filter:blur(10px);
  transition:box-shadow .24s ease,transform .24s ease;
}
.back-top.show{display:flex;}
.back-top:hover{box-shadow:0 0 24px rgba(0,229,255,.35);transform:translateY(-2px);}

/* ---------- Responsive ---------- */
@media screen and (max-width:1199px){
  .main-nav{gap:12px;}
  .nav-link{font-size:14px;}
  .news-grid{grid-template-columns:repeat(3,1fr);}
}
@media screen and (max-width:1023px){
  .main-nav{display:none;}
  .nav-toggle{display:flex;}
  .mobile-drawer{display:block;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero{min-height:auto;padding:60px 0 72px;}
  .trust-strip{grid-template-columns:repeat(2,1fr);margin-top:-28px;}
  .ladder{grid-template-columns:repeat(2,1fr);}
  .ladder::before{display:none;}
  .plans{grid-template-columns:1fr;gap:22px;}
  .plan-card--featured{margin-top:14px;}
  .form-shell{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media screen and (max-width:640px){
  body{font-size:15.5px;}
  .nav-wrap{height:66px;}
  .mobile-drawer{top:66px;}
  .brand-mark{width:36px;height:36px;font-size:17px;}
  .brand-text{font-size:17px;}
  .btn{padding:13px 24px;font-size:15px;}
  .hero-stats{grid-template-columns:1fr 1fr;}
  .trust-strip{grid-template-columns:1fr;margin-top:-20px;}
  .ladder{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .field-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .flash{flex-direction:column;align-items:flex-start;}
  .countdown{width:100%;}
  .countdown div{flex:1;min-width:0;}
  .accordion-title{padding:17px 18px;font-size:15.4px;}
  .accordion-content{padding:0 18px 20px;}
  .footer-bottom{justify-content:center;text-align:center;}
}

/* roulang page: article */
:root{
  --bg:#050A18;
  --bg-deep:#020611;
  --glass:rgba(12,24,48,.68);
  --glass-soft:rgba(12,24,48,.45);
  --panel:#0B1730;
  --primary:#1E6BFF;
  --cyan:#00E5FF;
  --violet:#7C4DFF;
  --success:#22C55E;
  --warn:#F59E0B;
  --text:#EAF2FF;
  --muted:#9FB2D4;
  --line:rgba(255,255,255,.12);
  --line-strong:rgba(0,229,255,.45);
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --sh-card:0 12px 40px rgba(0,0,0,.35);
  --sh-glow:0 0 28px rgba(0,229,255,.28);
  --sh-glow-strong:0 0 40px rgba(0,229,255,.45);
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(900px 620px at 10% -6%, rgba(0,229,255,.16), transparent 62%),
    radial-gradient(820px 560px at 92% 4%, rgba(124,77,255,.16), transparent 64%),
    radial-gradient(700px 500px at 50% 110%, rgba(30,107,255,.14), transparent 68%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.4;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 0%, #000 10%, transparent 78%);
  mask-image:radial-gradient(circle at 50% 0%, #000 10%, transparent 78%);
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .22s ease, border-color .22s ease, background .22s ease;}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:8px;}
h1,h2,h3,h4{font-weight:700;line-height:1.28;letter-spacing:.2px;margin:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
::selection{background:rgba(0,229,255,.3);color:#fff;}

/* ============ 基础容器 ============ */
.grid-container{
  max-width:var(--container);
  padding-left:20px;
  padding-right:20px;
  margin-left:auto;
  margin-right:auto;
}
.section{
  position:relative;
  z-index:1;
  padding:88px 0;
}
.section-tight{padding:56px 0;}
.section-head{margin-bottom:40px;max-width:760px;}
.section-title{
  font-size:clamp(26px,3vw,38px);
  color:#fff;
  margin-bottom:14px;
  letter-spacing:.4px;
}
.section-title span{
  background:linear-gradient(120deg,var(--cyan),var(--primary));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.section-sub{color:var(--muted);font-size:16px;line-height:1.8;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:13px 26px;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  cursor:pointer;
  text-align:center;
  transition:transform .2s ease, box-shadow .26s ease, background .26s ease, border-color .26s ease, color .22s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--cyan));
  color:#03132B;
  box-shadow:var(--sh-glow);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--sh-glow-strong);color:#03132B;}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 16px rgba(0,229,255,.32);}
.btn-ghost{
  background:rgba(255,255,255,.05);
  border-color:var(--line);
  color:var(--text);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{border-color:var(--line-strong);color:#fff;box-shadow:0 0 22px rgba(0,229,255,.2);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{min-height:40px;padding:10px 20px;font-size:14px;}
.btn-block{width:100%;}

/* ============ 徽章 ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 14px;
  border-radius:999px;
  font-size:12.5px;
  font-weight:500;
  line-height:1.4;
  color:#CFEAFF;
  background:var(--glass-soft);
  border:1px solid rgba(0,229,255,.32);
  backdrop-filter:blur(8px);
}
.badge i{font-size:11.5px;color:var(--cyan);}
.badge-violet{border-color:rgba(124,77,255,.45);color:#E2D8FF;}
.badge-violet i{color:#B39BFF;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
  background:rgba(5,10,24,.74);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:26px;
  min-height:76px;
}
.brand{
  display:flex;
  align-items:center;
  gap:11px;
  flex-shrink:0;
}
.brand-mark{
  width:40px;
  height:40px;
  border-radius:13px;
  display:grid;
  place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--cyan));
  color:#03132B;
  font-weight:800;
  font-size:19px;
  box-shadow:0 0 20px rgba(0,229,255,.35);
}
.brand-text{
  font-size:19px;
  font-weight:700;
  letter-spacing:.6px;
  color:#fff;
  white-space:nowrap;
}
.brand-text em{font-style:normal;color:var(--cyan);}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  padding:10px 14px;
  border-radius:999px;
  font-size:14.5px;
  color:var(--muted);
  white-space:nowrap;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06);}
.nav-link.is-active{
  color:#fff;
  background:rgba(0,229,255,.09);
  box-shadow:inset 0 0 0 1px rgba(0,229,255,.34);
}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-19px;
  transform:translateX(-50%);
  width:22px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  box-shadow:0 0 12px rgba(0,229,255,.9);
}
.header-cta{
  margin-left:14px;
  flex-shrink:0;
}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  cursor:pointer;
  margin-left:auto;
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .26s ease, opacity .26s ease;
}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* 移动抽屉 */
.drawer-mask{
  position:fixed;
  inset:0;
  z-index:80;
  background:rgba(2,6,17,.72);
  backdrop-filter:blur(4px);
  opacity:0;
  visibility:hidden;
  transition:opacity .3s ease, visibility .3s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.mobile-drawer{
  position:fixed;
  top:0;
  right:0;
  bottom:0;
  z-index:90;
  width:min(86vw,360px);
  display:flex;
  flex-direction:column;
  gap:22px;
  padding:22px;
  overflow-y:auto;
  background:#081226;
  border-left:1px solid var(--line);
  box-shadow:-20px 0 60px rgba(0,0,0,.5);
  transform:translateX(100%);
  transition:transform .35s cubic-bezier(.4,0,.2,1);
}
.mobile-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.drawer-close{
  width:42px;
  height:42px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  color:var(--text);
  cursor:pointer;
  font-size:16px;
}
.drawer-nav{display:flex;flex-direction:column;gap:8px;}
.drawer-link{
  padding:14px 16px;
  border-radius:14px;
  font-size:16px;
  color:var(--muted);
  border:1px solid transparent;
  background:rgba(255,255,255,.03);
  min-height:44px;
  display:flex;
  align-items:center;
}
.drawer-link:hover{color:#fff;border-color:var(--line-strong);background:rgba(0,229,255,.07);}
.drawer-link.is-active{color:#fff;background:rgba(0,229,255,.1);box-shadow:inset 0 0 0 1px rgba(0,229,255,.32);}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--muted);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb i{font-size:10px;opacity:.7;}
.breadcrumb .current{color:#D6E4FF;max-width:60vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ 文章头部 ============ */
.article-hero{
  position:relative;
  z-index:1;
  padding:104px 0 54px;
  border-bottom:1px solid var(--line);
  background-image:
    linear-gradient(180deg, rgba(5,10,24,.74) 0%, rgba(5,10,24,.92) 62%, rgba(5,10,24,.98) 100%),
    url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.article-hero::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-160px;
  transform:translateX(-50%);
  width:760px;
  height:320px;
  background:radial-gradient(closest-side, rgba(0,229,255,.18), transparent 72%);
  pointer-events:none;
}
.article-head{position:relative;z-index:2;max-width:940px;}
.article-title{
  font-size:clamp(28px,4vw,46px);
  line-height:1.28;
  color:#fff;
  margin:18px 0 20px;
  letter-spacing:.4px;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 22px;
  font-size:13.5px;
  color:var(--muted);
}
.article-meta span{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{color:var(--cyan);font-size:13px;}

/* 封面 */
.article-cover-wrap{
  position:relative;
  z-index:1;
  padding:44px 0 0;
}
.article-cover{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh-card);
  background:var(--panel);
  aspect-ratio:16 / 7;
}
.article-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.9;
  transition:transform .5s ease;
}
.article-cover:hover img{transform:scale(1.03);}
.article-cover::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(5,10,24,.08), rgba(5,10,24,.55));
}

/* ============ 正文布局 ============ */
.article-layout{padding:56px 0 0;}
.article-main{padding-bottom:20px;}
.article-body{
  max-width:860px;
  font-size:17px;
  line-height:1.85;
  color:#DCE7FA;
  word-break:break-word;
}
.article-body h2{
  position:relative;
  font-size:clamp(22px,2.4vw,28px);
  color:#fff;
  margin:2.2em 0 .85em;
  padding-left:18px;
  line-height:1.4;
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.2em;
  bottom:.2em;
  width:4px;
  border-radius:4px;
  background:linear-gradient(180deg,var(--cyan),var(--primary));
  box-shadow:0 0 16px rgba(0,229,255,.6);
}
.article-body h3{
  font-size:20px;
  color:#fff;
  margin:1.9em 0 .7em;
}
.article-body h4{
  font-size:17.5px;
  color:#E7F1FF;
  margin:1.6em 0 .6em;
}
.article-body p{margin:0 0 1.35em;}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.45em;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:.55em;}
.article-body li::marker{color:var(--cyan);}
.article-body strong{color:#fff;font-weight:600;}
.article-body blockquote{
  margin:1.7em 0;
  padding:20px 24px;
  border-radius:var(--r-md);
  background:var(--glass);
  border:1px solid var(--line);
  border-left:3px solid var(--cyan);
  color:#CFDDF5;
  backdrop-filter:blur(10px);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  max-width:100%;
  height:auto;
  border-radius:var(--r-md);
  margin:1.7em auto;
  border:1px solid var(--line);
}
.article-body a{
  color:var(--cyan);
  border-bottom:1px dashed rgba(0,229,255,.45);
  padding-bottom:1px;
}
.article-body a:hover{color:#fff;border-bottom-color:#fff;}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:1.7em 0;
  font-size:15px;
  border-radius:var(--r-sm);
  overflow:hidden;
}
.article-body th,.article-body td{
  padding:12px 15px;
  border:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}
.article-body th{background:rgba(30,107,255,.16);color:#fff;font-weight:600;}
.article-body tr:nth-child(even) td{background:rgba(255,255,255,.02);}
.article-body code{
  padding:2px 7px;
  border-radius:6px;
  background:rgba(0,229,255,.1);
  color:var(--cyan);
  font-size:.92em;
  font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
.article-body pre{
  padding:18px 20px;
  border-radius:var(--r-md);
  background:var(--bg-deep);
  border:1px solid var(--line);
  overflow-x:auto;
  margin:1.7em 0;
  font-size:14px;
  line-height:1.7;
}
.article-body pre code{background:none;color:#BFE6FF;padding:0;}
.article-body hr{
  margin:2.4em 0;
  border:0;
  border-top:1px solid var(--line);
}

/* 空状态 */
.empty-state{
  padding:56px 28px;
  text-align:center;
  border-radius:var(--r-lg);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.empty-state i{
  font-size:34px;
  color:var(--cyan);
  margin-bottom:16px;
  display:block;
  opacity:.8;
}
.empty-state h2{font-size:22px;color:#fff;margin-bottom:10px;}
.empty-state p{color:var(--muted);margin-bottom:22px;}

/* ============ 侧栏 ============ */
.article-aside{
  display:flex;
  flex-direction:column;
  gap:20px;
}
.aside-sticky{position:sticky;top:104px;display:flex;flex-direction:column;gap:20px;}
.aside-card{
  border-radius:var(--r-lg);
  background:var(--panel);
  border:1px solid var(--line);
  padding:24px;
  box-shadow:var(--sh-card);
}
.aside-card h3{
  font-size:17px;
  color:#fff;
  margin-bottom:16px;
  display:flex;
  align-items:center;
  gap:9px;
}
.aside-card h3 i{color:var(--cyan);font-size:15px;}
.aside-links{display:flex;flex-direction:column;gap:4px;}
.aside-links a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:11px 12px;
  border-radius:12px;
  font-size:14.5px;
  color:var(--muted);
  border:1px solid transparent;
}
.aside-links a i{font-size:12px;color:var(--cyan);opacity:.85;}
.aside-links a:hover{
  color:#fff;
  background:rgba(0,229,255,.07);
  border-color:rgba(0,229,255,.28);
  transform:translateX(2px);
}
.aside-note{
  font-size:13.5px;
  color:var(--muted);
  line-height:1.8;
  margin-bottom:16px;
}
.aside-highlight{
  background:linear-gradient(150deg, rgba(30,107,255,.24), rgba(0,229,255,.1));
  border-color:rgba(0,229,255,.3);
}
.aside-highlight h3{color:#fff;}
.aside-highlight .aside-note{color:#C7DBFB;}

/* ============ 标签 ============ */
.tag-block{
  max-width:860px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin:42px 0 0;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.tag-block .tag-label{font-size:13.5px;color:var(--muted);margin-right:4px;}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:7px 15px;
  border-radius:999px;
  font-size:13px;
  color:#CFEAFF;
  background:var(--glass-soft);
  border:1px solid var(--line);
  transition:border-color .24s ease, color .24s ease, box-shadow .24s ease;
}
.tag:hover{border-color:var(--line-strong);color:#fff;box-shadow:0 0 18px rgba(0,229,255,.22);}

/* ============ 上下篇 ============ */
.post-nav{
  max-width:860px;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
  margin-top:28px;
}
.post-nav a{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:18px 20px;
  border-radius:var(--r-md);
  background:var(--panel);
  border:1px solid var(--line);
  font-size:15px;
  color:#DCE7FA;
  transition:border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.post-nav a:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:var(--sh-glow);}
.post-nav .pn-label{font-size:12.5px;color:var(--cyan);letter-spacing:.6px;}
.post-nav .pn-title{font-weight:600;color:#fff;line-height:1.5;}
.post-nav .pn-next{text-align:right;align-items:flex-end;}

/* ============ 相关推荐 ============ */
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:22px;
}
.related-card{
  display:flex;
  flex-direction:column;
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--panel);
  border:1px solid var(--line);
  box-shadow:var(--sh-card);
  transition:border-color .28s ease, transform .28s ease, box-shadow .28s ease;
}
.related-card:hover{
  border-color:var(--line-strong);
  transform:translateY(-4px);
  box-shadow:0 18px 48px rgba(0,0,0,.45), 0 0 26px rgba(0,229,255,.24);
}
.related-thumb{
  position:relative;
  aspect-ratio:16 / 9;
  overflow:hidden;
  background:var(--bg-deep);
}
.related-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.86;
  transition:transform .5s ease, opacity .5s ease;
}
.related-card:hover .related-thumb img{transform:scale(1.05);opacity:1;}
.related-thumb .badge{
  position:absolute;
  left:14px;
  top:14px;
  z-index:2;
}
.related-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.related-body h3{font-size:17px;color:#fff;line-height:1.5;}
.related-body p{
  font-size:14px;
  color:var(--muted);
  line-height:1.75;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.related-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  font-size:13px;
  color:var(--muted);
}
.related-foot .go{color:var(--cyan);display:inline-flex;align-items:center;gap:6px;font-weight:500;}

/* ============ FAQ ============ */
.faq-list{max-width:900px;}
.faq-item{
  border-radius:var(--r-md);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(10px);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .25s ease, box-shadow .25s ease;
}
.faq-item:hover{border-color:rgba(0,229,255,.28);}
.faq-item[open]{border-color:rgba(0,229,255,.4);box-shadow:0 0 24px rgba(0,229,255,.14);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:19px 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  font-size:16.5px;
  font-weight:600;
  color:#fff;
  min-height:44px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary i{
  flex-shrink:0;
  color:var(--cyan);
  font-size:14px;
  transition:transform .3s ease;
}
.faq-item[open] summary i{transform:rotate(45deg);}
.faq-body{
  padding:0 24px 22px;
  font-size:15.5px;
  line-height:1.85;
  color:var(--muted);
}
.faq-body p+p{margin-top:12px;}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  z-index:1;
  margin:0 auto;
  max-width:var(--container);
  padding:0 20px;
}
.cta-inner{
  position:relative;
  overflow:hidden;
  border-radius:26px;
  padding:52px 44px;
  background:
    radial-gradient(620px 300px at 12% 10%, rgba(0,229,255,.2), transparent 68%),
    radial-gradient(520px 300px at 88% 90%, rgba(124,77,255,.22), transparent 70%),
    var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  box-shadow:var(--sh-card);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:28px;
}
.cta-inner h2{font-size:clamp(22px,2.6vw,32px);color:#fff;margin-bottom:12px;}
.cta-inner p{color:var(--muted);font-size:15.5px;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:96px;
  padding:72px 0 26px;
  background:linear-gradient(180deg, rgba(2,6,17,.4), rgba(2,6,17,.96));
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:11px;
  margin-bottom:16px;
}
.footer-brand .brand-mark{
  width:38px;
  height:38px;
  border-radius:12px;
  font-size:18px;
}
.footer-brand .brand-text{font-size:18px;}
.footer-col p{
  font-size:14px;
  color:var(--muted);
  line-height:1.85;
  margin-bottom:16px;
  max-width:340px;
}
.footer-col h4{
  font-size:15.5px;
  color:#fff;
  font-weight:600;
  margin-bottom:18px;
  letter-spacing:.5px;
}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{
  font-size:14px;
  color:var(--muted);
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.footer-links a:hover{color:var(--cyan);}
.footer-contact li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:13.8px;
  color:var(--muted);
  line-height:1.7;
}
.footer-contact i{color:var(--cyan);font-size:13px;margin-top:4px;}
.footer-bottom{
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:var(--muted);
}
.footer-bottom a{color:var(--cyan);}
.footer-bottom a:hover{color:#fff;}

/* ============ 响应式 ============ */
@media screen and (max-width:1199px){
  .main-nav{gap:0;}
  .nav-link{padding:10px 11px;font-size:14px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media screen and (max-width:1023px){
  .main-nav{display:none;}
  .nav-toggle{display:flex;}
  .header-cta{display:none;}
  .section{padding:68px 0;}
  .article-hero{padding:88px 0 44px;}
  .article-layout{padding:44px 0 0;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .aside-sticky{position:static;}
  .article-aside{margin-top:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .cta-inner{padding:42px 30px;}
}
@media screen and (max-width:767px){
  .grid-container{padding-left:16px;padding-right:16px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:28px;}
  .brand-text{font-size:17px;}
  .brand-mark{width:36px;height:36px;border-radius:11px;font-size:17px;}
  .header-inner{min-height:66px;gap:14px;}
  .article-hero{padding:78px 0 38px;}
  .article-title{font-size:26px;}
  .article-meta{gap:8px 16px;font-size:13px;}
  .article-cover-wrap{padding:30px 0 0;}
  .article-cover{aspect-ratio:16 / 10;border-radius:18px;}
  .article-body{font-size:16px;line-height:1.85;}
  .related-grid{grid-template-columns:1fr;}
  .post-nav{grid-template-columns:1fr;}
  .post-nav .pn-next{text-align:left;align-items:flex-start;}
  .cta-inner{padding:34px 22px;border-radius:20px;flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .site-footer{margin-top:64px;padding:56px 0 24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media screen and (max-width:520px){
  .badge{font-size:12px;padding:5px 12px;}
  .btn{padding:12px 20px;font-size:14.5px;}
  .article-body h2{font-size:21px;padding-left:14px;}
  .faq-item summary{padding:16px 18px;font-size:15.5px;}
  .faq-body{padding:0 18px 18px;font-size:15px;}
  .aside-card{padding:20px;}
  .footer-col p{max-width:none;}
}

/* roulang page: category1 */
:root{
  --bg:#050A18;
  --bg-deep:#020611;
  --glass:rgba(12,24,48,.68);
  --panel:#0B1730;
  --panel-2:#0E1C38;
  --primary:#1E6BFF;
  --cyan:#00E5FF;
  --purple:#7C4DFF;
  --success:#22C55E;
  --warn:#F59E0B;
  --text:#EAF2FF;
  --muted:#9FB2D4;
  --line:rgba(255,255,255,.12);
  --line-strong:rgba(0,229,255,.38);
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --pill:999px;
  --sh:0 12px 40px rgba(0,0,0,.35);
  --glow:0 0 28px rgba(0,229,255,.28);
  --section-gap:112px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(900px 520px at 12% -6%, rgba(0,229,255,.16), transparent 62%),
    radial-gradient(820px 520px at 92% 8%, rgba(124,77,255,.16), transparent 64%);
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--cyan);text-decoration:none;transition:color .22s ease,opacity .22s ease;}
a:hover,a:focus{color:#7FF2FF;}
h1,h2,h3,h4{color:#fff;line-height:1.25;margin:0 0 14px;font-weight:700;letter-spacing:.2px;}
h1{font-size:clamp(32px,5vw,56px);line-height:1.14;}
h2{font-size:clamp(26px,3vw,40px);}
h3{font-size:clamp(19px,2vw,24px);}
p{margin:0 0 16px;color:var(--muted);}
ul,ol{margin:0 0 16px;padding-left:20px;color:var(--muted);}
li{margin-bottom:8px;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}

.grid-container{max-width:1240px;margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px;}
@media screen and (min-width:1024px){
  .grid-container{padding-left:32px;padding-right:32px;}
}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(5,10,24,.82);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
}
.brand-mark{
  width:38px;
  height:38px;
  border-radius:12px;
  display:grid;
  place-items:center;
  font-weight:800;
  font-size:18px;
  color:#031021;
  background:linear-gradient(135deg,var(--cyan),var(--primary));
  box-shadow:var(--glow);
}
.brand-text{
  font-size:19px;
  font-weight:700;
  color:#fff;
  letter-spacing:.4px;
  white-space:nowrap;
}
.brand-text em{
  font-style:normal;
  color:var(--cyan);
}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  flex:1 1 auto;
  justify-content:center;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:15px;
  color:var(--muted);
  border-radius:var(--pill);
  white-space:nowrap;
  transition:color .22s ease,background .22s ease;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06);}
.nav-link.is-active{color:#fff;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:2px;
  transform:translateX(-50%);
  width:22px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--primary));
  box-shadow:0 0 12px rgba(0,229,255,.7);
}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  color:var(--text);
  font-size:17px;
  cursor:pointer;
  transition:border-color .22s ease,color .22s ease;
}
.nav-toggle:hover{border-color:var(--cyan);color:#fff;}

/* Mobile drawer */
.mobile-drawer{
  position:fixed;
  top:0;
  right:0;
  height:100%;
  width:min(88vw,340px);
  background:rgba(6,12,28,.97);
  backdrop-filter:blur(20px);
  border-left:1px solid var(--line);
  transform:translateX(102%);
  transition:transform .34s cubic-bezier(.4,0,.2,1);
  z-index:80;
  padding:26px 22px 40px;
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.drawer-close{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.05);color:var(--text);cursor:pointer;font-size:16px;
}
.drawer-link{
  display:block;
  padding:15px 16px;
  margin-bottom:10px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--muted);
  font-size:16px;
  min-height:48px;
}
.drawer-link:hover{color:#fff;border-color:var(--line-strong);}
.drawer-link.is-active{
  color:#fff;
  border-color:var(--line-strong);
  background:linear-gradient(135deg,rgba(30,107,255,.28),rgba(0,229,255,.12));
  box-shadow:var(--glow);
}
.drawer-cta{margin-top:18px;}
.overlay{
  position:fixed;inset:0;background:rgba(2,6,17,.7);
  opacity:0;visibility:hidden;transition:opacity .3s ease;z-index:70;
}
.overlay.is-open{opacity:1;visibility:visible;}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  padding:14px 28px;
  border-radius:var(--pill);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
  min-height:46px;
  text-align:center;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--cyan));
  color:#02101F;
  box-shadow:0 0 28px rgba(0,229,255,.28);
}
.btn-primary:hover,.btn-primary:focus{
  color:#02101F;
  transform:translateY(-1px);
  box-shadow:0 0 42px rgba(0,229,255,.52);
}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 18px rgba(0,229,255,.3);}
.btn-ghost{
  background:rgba(255,255,255,.05);
  border-color:var(--line);
  color:var(--text);
}
.btn-ghost:hover,.btn-ghost:focus{
  color:#fff;
  border-color:var(--cyan);
  box-shadow:0 0 22px rgba(0,229,255,.2);
  transform:translateY(-1px);
}
.btn-block{width:100%;}
.btn-sm{padding:10px 20px;font-size:14px;min-height:40px;}

/* ============ Badges ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:6px 14px;
  border-radius:var(--pill);
  font-size:12.5px;
  line-height:1.4;
  color:#CFE4FF;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
}
.badge i{color:var(--cyan);}
.badge-purple{border-color:rgba(124,77,255,.5);color:#D9CBFF;}
.badge-purple i{color:#B69BFF;}

/* ============ Sections ============ */
.section{padding:var(--section-gap) 0;position:relative;z-index:1;}
.section-tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:2px;text-transform:uppercase;
  color:var(--cyan);margin-bottom:14px;font-weight:600;
}
.eyebrow::before{
  content:"";width:26px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent);
}
.lead{font-size:17.5px;color:#C4D5F0;line-height:1.85;}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:84px 0 76px;
  background-image:linear-gradient(180deg,rgba(2,6,17,.86),rgba(5,10,24,.94)),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  z-index:1;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(720px 420px at 30% 40%,#000,transparent 78%);
  -webkit-mask-image:radial-gradient(720px 420px at 30% 40%,#000,transparent 78%);
}
.page-hero .grid-container{position:relative;z-index:2;}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:9px;
  font-size:13.5px;color:var(--muted);margin-bottom:22px;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--cyan);}
.crumb i{font-size:10px;color:rgba(159,178,212,.6);}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center;}
.hero-copy h1 span{color:var(--cyan);}
.hero-copy .lead{max-width:600px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:22px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}
.hero-card{
  background:var(--glass);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:28px 26px;
  box-shadow:var(--sh);
}
.hero-card h3{font-size:19px;margin-bottom:6px;}
.hero-card .card-sub{font-size:13.5px;color:var(--muted);margin-bottom:20px;}
.line-list{list-style:none;padding:0;margin:0;}
.line-list li{
  display:flex;align-items:flex-start;justify-content:space-between;gap:14px;
  padding:13px 0;margin:0;
  border-bottom:1px dashed rgba(255,255,255,.1);
  font-size:15px;color:#D6E4FA;
}
.line-list li:last-child{border-bottom:0;}
.line-list .line-name{display:flex;align-items:center;gap:9px;font-weight:600;color:#fff;}
.line-list .line-name i{color:var(--cyan);font-size:13px;}
.dot-ok{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--success);white-space:nowrap;}
.dot-ok::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 10px rgba(34,197,94,.9);}

/* ============ Split section ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.split-media{position:relative;}
.split-media img{
  width:100%;border-radius:var(--r-lg);
  border:1px solid var(--line);
  box-shadow:var(--sh);
}
.split-media::before{
  content:"";position:absolute;inset:-16px -16px auto auto;width:150px;height:150px;
  border-radius:50%;background:radial-gradient(circle,rgba(0,229,255,.24),transparent 70%);
  filter:blur(6px);z-index:-1;
}
.check-list{list-style:none;padding:0;margin:0 0 24px;}
.check-list li{
  position:relative;padding-left:34px;margin-bottom:14px;color:#C7D8F2;font-size:16px;
}
.check-list li::before{
  content:"\f00c";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  position:absolute;left:0;top:2px;
  width:22px;height:22px;border-radius:50%;
  display:grid;place-items:center;
  font-size:11px;color:#02101F;
  background:linear-gradient(135deg,var(--cyan),var(--primary));
  box-shadow:0 0 14px rgba(0,229,255,.35);
}
.note-box{
  border-left:3px solid var(--cyan);
  padding:14px 18px;
  background:rgba(0,229,255,.06);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:#C4D5F0;font-size:15px;
}

/* ============ Steps ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:22px;
  position:relative;
}
.step-card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:30px 24px 26px;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.step-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:0 0 30px rgba(0,229,255,.14);
}
.step-num{
  display:grid;place-items:center;
  width:46px;height:46px;
  border-radius:14px;
  font-weight:700;font-size:17px;font-family:"SFMono-Regular",Consolas,monospace;
  color:#02101F;
  background:linear-gradient(135deg,var(--cyan),var(--primary));
  box-shadow:0 0 24px rgba(0,229,255,.34);
  margin-bottom:18px;
}
.step-card h3{font-size:18.5px;margin-bottom:10px;}
.step-card p{font-size:15px;margin-bottom:0;}

/* ============ Cards grid ============ */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.info-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:26px 24px;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.info-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:0 0 32px rgba(0,229,255,.14);
}
.info-card .ico{
  width:44px;height:44px;border-radius:13px;
  display:grid;place-items:center;
  font-size:17px;color:var(--cyan);
  background:rgba(0,229,255,.09);
  border:1px solid rgba(0,229,255,.22);
  margin-bottom:16px;
}
.info-card h3{font-size:18px;margin-bottom:9px;}
.info-card p{font-size:15px;margin-bottom:0;}

/* ============ Media cards ============ */
.media-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}
.media-card{
  display:flex;
  gap:22px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.media-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:0 0 32px rgba(0,229,255,.14);
}
.media-card .thumb{
  flex:0 0 168px;
  overflow:hidden;
}
.media-card .thumb img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .4s ease;
}
.media-card:hover .thumb img{transform:scale(1.04);}
.media-card .body{padding:22px 22px 22px 0;}
.media-card .body h3{font-size:17.5px;margin-bottom:8px;}
.media-card .body p{font-size:14.8px;margin-bottom:0;}

/* ============ Stats ============ */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  background:var(--glass);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:38px 30px;
  box-shadow:var(--sh);
}
.stat{text-align:center;}
.stat b{
  display:block;
  font-size:clamp(28px,3.4vw,38px);
  font-weight:700;
  font-family:"SFMono-Regular",Consolas,monospace;
  color:#fff;
  line-height:1.2;
  background:linear-gradient(135deg,#fff,var(--cyan));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.stat span{display:block;font-size:13.5px;color:var(--muted);margin-top:8px;}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--glass);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.faq-item.is-open{
  border-color:var(--line-strong);
  box-shadow:0 0 28px rgba(0,229,255,.14);
}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:20px 24px;
  background:transparent;
  border:0;
  color:#fff;
  font-size:16.5px;
  font-weight:600;
  text-align:left;
  cursor:pointer;
  line-height:1.5;
}
.faq-q:hover{color:#CFEFFF;}
.faq-icon{
  flex:0 0 auto;
  width:28px;height:28px;border-radius:50%;
  display:grid;place-items:center;
  font-size:12px;color:var(--cyan);
  border:1px solid rgba(0,229,255,.32);
  transition:transform .3s ease,background .3s ease;
}
.faq-item.is-open .faq-icon{
  transform:rotate(180deg);
  background:rgba(0,229,255,.14);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .38s ease;
}
.faq-a-inner{
  padding:0 24px 22px;
  color:var(--muted);
  font-size:15.5px;
  line-height:1.85;
  border-top:1px solid rgba(255,255,255,.07);
  padding-top:16px;
}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:56px 48px;
  background-image:linear-gradient(120deg,rgba(2,6,17,.92),rgba(11,23,48,.86)),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  box-shadow:var(--sh);
}
.cta-band::after{
  content:"";
  position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,229,255,.24),transparent 70%);
  filter:blur(10px);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.4fr .6fr;gap:34px;align-items:center;}
.cta-inner h2{margin-bottom:12px;}
.cta-inner p{margin-bottom:0;max-width:620px;}
.cta-actions{display:flex;flex-direction:column;gap:12px;}

/* ============ Footer ============ */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:20px;
  padding:72px 0 26px;
  background:var(--bg-deep);
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.footer-col p{font-size:14.5px;line-height:1.8;color:var(--muted);margin-bottom:16px;}
.footer-col h4{font-size:15.5px;margin-bottom:18px;color:#fff;letter-spacing:.4px;}
.footer-links{list-style:none;padding:0;margin:0;}
.footer-links li{margin-bottom:11px;}
.footer-links a{color:var(--muted);font-size:14.5px;}
.footer-links a:hover{color:var(--cyan);}
.footer-contact li{display:flex;gap:10px;color:var(--muted);font-size:14.5px;align-items:flex-start;}
.footer-contact i{color:var(--cyan);margin-top:5px;font-size:13px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-top:24px;
  font-size:13.5px;color:#7C8FB4;
}
.footer-bottom a{color:var(--cyan);}

/* ============ Responsive ============ */
@media screen and (max-width:1199px){
  :root{--section-gap:92px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .stats{grid-template-columns:repeat(2,1fr);gap:28px;}
}
@media screen and (max-width:1023px){
  .main-nav{display:none;}
  .nav-toggle{display:grid;place-items:center;}
  .nav-actions .btn{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .split{grid-template-columns:1fr;gap:34px;}
  .split-media{order:-1;}
  .cta-inner{grid-template-columns:1fr;gap:26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .page-hero{padding:64px 0 58px;}
}
@media screen and (max-width:767px){
  body{font-size:16px;}
  :root{--section-gap:66px;}
  .media-grid{grid-template-columns:1fr;}
  .media-card .thumb{flex-basis:126px;}
  .cta-band{padding:38px 24px;border-radius:var(--r-md);}
  .stats{padding:28px 20px;}
  .section-head{margin-bottom:34px;}
}
@media screen and (max-width:639px){
  .card-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr 1fr;gap:22px;}
  .footer-grid{grid-template-columns:1fr;}
  .brand-text{font-size:17px;}
  .btn{width:100%;}
  .hero-actions{flex-direction:column;}
  .media-card{flex-direction:column;}
  .media-card .thumb{flex-basis:auto;height:170px;}
  .media-card .body{padding:18px 20px 22px;}
  .faq-q{font-size:15.5px;padding:17px 18px;}
  .faq-a-inner{padding:14px 18px 20px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category2 */
:root{
  --bg:#050A18;
  --bg-deep:#020611;
  --surface:rgba(12,24,48,.68);
  --surface-2:rgba(12,24,48,.45);
  --panel:#0B1730;
  --panel-2:#0E1D3A;
  --primary:#1E6BFF;
  --cyan:#00E5FF;
  --violet:#7C4DFF;
  --success:#22C55E;
  --warn:#F59E0B;
  --text:#EAF2FF;
  --muted:#9FB2D4;
  --line:rgba(255,255,255,.12);
  --line-strong:rgba(0,229,255,.35);
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --shadow:0 12px 40px rgba(0,0,0,.35);
  --glow:0 0 28px rgba(0,229,255,.28);
  --glow-strong:0 0 42px rgba(0,229,255,.45);
  --pad-x:20px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(680px 460px at 12% -6%,rgba(0,229,255,.16),transparent 70%),
    radial-gradient(720px 520px at 92% 8%,rgba(124,77,255,.16),transparent 72%),
    linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:auto,auto,64px 64px,64px 64px;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .22s ease,border-color .22s ease,background .22s ease;}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:.2px;}
p{margin:0 0 1.1em;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}

.grid-container{max-width:1200px;margin:0 auto;padding:0 var(--pad-x);}
.grid-container.full{max-width:100%;}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(5,10,24,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .3s ease,border-color .3s ease;
}
.site-header.is-scrolled{background:rgba(3,7,18,.94);border-bottom-color:rgba(0,229,255,.22);}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  height:76px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;
  font-weight:800;font-size:18px;
  background:linear-gradient(135deg,var(--primary),var(--cyan));
  color:#02101F;
  box-shadow:var(--glow);
}
.brand-text{font-size:18px;font-weight:700;letter-spacing:.4px;white-space:nowrap;}
.brand-text em{font-style:normal;color:var(--cyan);}

.nav-wrap{display:flex;align-items:center;gap:8px;}
.main-nav{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;
  padding:9px 14px;
  border-radius:999px;
  font-size:15px;
  color:var(--muted);
  font-weight:500;
  white-space:nowrap;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.06);}
.nav-link.is-active{color:var(--cyan);background:rgba(0,229,255,.10);}
.nav-link.is-active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  bottom:2px;width:18px;height:2px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 10px var(--cyan);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:999px;
  font-size:15px;font-weight:600;
  color:#02101F;
  background:linear-gradient(135deg,var(--cyan),var(--primary));
  box-shadow:var(--glow);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:var(--glow-strong);color:#02101F;}
.nav-cta:active{transform:translateY(1px);}
.nav-toggle{
  display:none;
  width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.06);
  border:1px solid var(--line);
  color:var(--text);
  cursor:pointer;
}
.mobile-drawer{
  display:none;
  position:fixed;
  top:0;right:0;
  width:min(320px,86vw);
  height:100%;
  z-index:80;
  background:linear-gradient(180deg,rgba(7,14,30,.99),rgba(3,7,18,.99));
  border-left:1px solid var(--line);
  padding:84px 22px 30px;
  transform:translateX(105%);
  transition:transform .32s cubic-bezier(.4,0,.2,1);
}
.mobile-drawer.is-open{transform:translateX(0);}
.mobile-drawer a{
  display:block;
  padding:14px 14px;
  border-radius:14px;
  font-size:17px;
  color:var(--muted);
  border:1px solid transparent;
}
.mobile-drawer a:hover,.mobile-drawer a.is-active{
  color:var(--cyan);background:rgba(0,229,255,.08);border-color:rgba(0,229,255,.28);
}
.drawer-close{
  position:absolute;top:20px;right:18px;
  width:42px;height:42px;border-radius:12px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);
  color:var(--text);cursor:pointer;
}
.backdrop{
  display:none;position:fixed;inset:0;z-index:70;
  background:rgba(2,6,17,.7);
  backdrop-filter:blur(3px);
}
.backdrop.is-open{display:block;}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  z-index:1;
  overflow:hidden;
  padding:74px 0 64px;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(115deg,rgba(2,6,17,.94) 8%,rgba(5,10,24,.82) 52%,rgba(2,6,17,.92) 100%);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.35fr .95fr;gap:38px;align-items:center;}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:16px;}
.crumbs a:hover{color:var(--cyan);}
.crumbs span.sep{margin:0 8px;opacity:.55;}
.page-hero h1{
  font-size:clamp(30px,4.4vw,50px);
  font-weight:700;
  margin-bottom:16px;
}
.page-hero h1 em{font-style:normal;background:linear-gradient(120deg,var(--cyan),#8FD3FF 60%,var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{font-size:17px;color:var(--muted);max-width:620px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:26px;
  box-shadow:var(--shadow);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
.hero-panel h3{font-size:17px;margin-bottom:16px;display:flex;align-items:center;gap:9px;}
.hero-panel h3 i{color:var(--cyan);}
.hero-panel ul li{
  display:flex;justify-content:space-between;
  gap:12px;
  padding:11px 0;
  border-bottom:1px dashed rgba(255,255,255,.10);
  font-size:14.5px;
  color:var(--muted);
}
.hero-panel ul li:last-child{border-bottom:0;padding-bottom:0;}
.hero-panel ul li strong{color:var(--text);font-weight:600;}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;
  border-radius:999px;
  font-size:15px;font-weight:600;
  cursor:pointer;border:1px solid transparent;
  transition:transform .2s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
  min-height:44px;
}
.btn-primary{
  color:#02101F;
  background:linear-gradient(120deg,var(--cyan),var(--primary));
  box-shadow:var(--glow);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--glow-strong);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 16px rgba(0,229,255,.35);}
.btn-ghost{
  color:var(--text);
  background:rgba(255,255,255,.05);
  border-color:var(--line);
  backdrop-filter:blur(8px);
}
.btn-ghost:hover{border-color:var(--line-strong);color:var(--cyan);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-block{width:100%;}

/* ============ Badges ============ */
.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 14px;
  border-radius:999px;
  font-size:12.5px;
  letter-spacing:.3px;
  color:#CFE6FF;
  background:rgba(0,229,255,.09);
  border:1px solid rgba(0,229,255,.28);
}
.badge.violet{color:#D9CCFF;background:rgba(124,77,255,.12);border-color:rgba(124,77,255,.34);}
.badge.warm{color:#FFE0B2;background:rgba(245,158,11,.12);border-color:rgba(245,158,11,.34);}
.badge.plain{color:var(--muted);background:rgba(255,255,255,.05);border-color:var(--line);}

/* ============ Sections ============ */
main{position:relative;z-index:1;}
.section{padding:88px 0;}
.section.tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:42px;}
.section-head h2{font-size:clamp(25px,3vw,38px);margin-bottom:14px;}
.section-head p{color:var(--muted);font-size:16px;margin:0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:2px;text-transform:uppercase;
  color:var(--cyan);margin-bottom:14px;
}

/* ============ Two-column layout ============ */
.split{display:grid;grid-template-columns:330px minmax(0,1fr);gap:38px;align-items:start;}
.aside-sticky{position:sticky;top:100px;}
.aside-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px;
  box-shadow:var(--shadow);
  margin-bottom:20px;
}
.aside-card h3{font-size:18px;margin-bottom:12px;}
.aside-card p{color:var(--muted);font-size:14.5px;margin-bottom:16px;}
.aside-index{list-style:none;}
.aside-index li{margin-bottom:6px;}
.aside-index a{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;
  border-radius:12px;
  font-size:14.5px;
  color:var(--muted);
  border:1px solid transparent;
}
.aside-index a i{color:var(--cyan);font-size:12px;opacity:.8;}
.aside-index a:hover{color:var(--text);background:rgba(255,255,255,.05);border-color:var(--line);}
.aside-index a.is-current{color:var(--cyan);background:rgba(0,229,255,.08);border-color:rgba(0,229,255,.26);}

.consult-card{
  background:linear-gradient(160deg,rgba(0,229,255,.12),rgba(124,77,255,.12));
  border:1px solid rgba(0,229,255,.26);
  border-radius:var(--r-lg);
  padding:24px;
  box-shadow:var(--glow);
}
.consult-card h3{font-size:17px;margin-bottom:10px;display:flex;align-items:center;gap:9px;}
.consult-card ul{margin:14px 0 18px;}
.consult-card ul li{
  font-size:14px;color:#CFE6FF;
  padding-left:20px;position:relative;margin-bottom:8px;
}
.consult-card ul li::before{
  content:"";position:absolute;left:0;top:9px;
  width:8px;height:8px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 10px var(--cyan);
}

/* ============ Tier cards ============ */
.tier-list{display:grid;gap:20px;}
.tier-card{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr) 220px;
  gap:24px;
  align-items:center;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:26px 28px;
  box-shadow:var(--shadow);
  transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.tier-card:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:0 16px 44px rgba(0,0,0,.42),var(--glow);}
.tier-card.featured{
  background:linear-gradient(150deg,rgba(12,24,48,.92),rgba(9,20,42,.86));
  border-color:rgba(0,229,255,.38);
  box-shadow:0 16px 50px rgba(0,0,0,.45),0 0 26px rgba(0,229,255,.18);
}
.tier-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:10px;}
.tier-head h3{font-size:21px;}
.tier-num{
  width:34px;height:34px;flex:0 0 auto;
  border-radius:10px;
  display:grid;place-items:center;
  font-size:14px;font-weight:700;
  color:#02101F;
  background:linear-gradient(135deg,var(--cyan),var(--primary));
  box-shadow:0 0 18px rgba(0,229,255,.35);
}
.tier-desc{color:var(--muted);font-size:15px;margin-bottom:14px;}
.tier-meta{display:flex;flex-wrap:wrap;gap:20px;}
.tier-meta div{font-size:13.5px;color:var(--muted);}
.tier-meta div strong{display:block;color:var(--text);font-size:15px;font-weight:600;margin-top:3px;}
.tier-side{
  border-left:1px dashed rgba(255,255,255,.12);
  padding-left:24px;
  text-align:left;
}
.tier-side .badge{margin-bottom:14px;}
.tier-side .btn{width:100%;}

/* ============ Steps flow ============ */
.flow{display:grid;gap:0;margin-top:12px;}
.flow-item{
  display:grid;
  grid-template-columns:64px minmax(0,1fr);
  gap:20px;
  padding-bottom:26px;
  position:relative;
}
.flow-item:last-child{padding-bottom:0;}
.flow-item::before{
  content:"";position:absolute;
  left:31px;top:64px;bottom:0;
  width:2px;
  background:linear-gradient(180deg,rgba(0,229,255,.55),rgba(124,77,255,.10));
}
.flow-item:last-child::before{display:none;}
.flow-dot{
  width:64px;height:64px;
  border-radius:18px;
  display:grid;place-items:center;
  font-size:20px;font-weight:700;
  color:var(--cyan);
  background:rgba(0,229,255,.08);
  border:1px solid rgba(0,229,255,.30);
  box-shadow:inset 0 0 22px rgba(0,229,255,.12);
}
.flow-body{
  background:var(--panel-2);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:20px 22px;
  transition:border-color .22s ease,transform .22s ease;
}
.flow-body:hover{border-color:var(--line-strong);transform:translateX(3px);}
.flow-body h3{font-size:18px;margin-bottom:8px;}
.flow-body p{color:var(--muted);font-size:14.5px;margin:0;}

/* ============ Media block ============ */
.media-card{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:34px;
  align-items:center;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--shadow);
}
.media-card img{width:100%;height:100%;object-fit:cover;min-height:290px;}
.media-body{padding:34px 34px 34px 0;}
.media-body h3{font-size:24px;margin-bottom:14px;}
.media-body p{color:var(--muted);font-size:15.5px;}
.check-list li{
  position:relative;
  padding-left:26px;
  margin-bottom:10px;
  font-size:15px;
  color:#CFE6FF;
}
.check-list li i{
  position:absolute;left:0;top:5px;
  color:var(--cyan);font-size:14px;
}

/* ============ Stats ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.stat{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:24px 22px;
  text-align:center;
  transition:border-color .22s ease,transform .22s ease;
}
.stat:hover{border-color:var(--line-strong);transform:translateY(-3px);}
.stat strong{
  display:block;
  font-size:30px;
  font-weight:700;
  letter-spacing:.5px;
  background:linear-gradient(120deg,var(--cyan),#9FD8FF);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  margin-bottom:6px;
  font-variant-numeric:tabular-nums;
}
.stat span{font-size:13.5px;color:var(--muted);}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:14px;}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:border-color .24s ease;
}
.faq-item.is-open{border-color:rgba(0,229,255,.35);box-shadow:0 0 22px rgba(0,229,255,.14);}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:19px 22px;
  background:transparent;border:0;
  text-align:left;
  font-size:16.5px;font-weight:600;
  color:var(--text);
  cursor:pointer;
}
.faq-q:hover{color:var(--cyan);}
.faq-q .ico{
  flex:0 0 auto;
  width:28px;height:28px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid rgba(0,229,255,.35);
  color:var(--cyan);font-size:12px;
  transition:transform .28s ease,background .24s ease;
}
.faq-item.is-open .faq-q .ico{transform:rotate(180deg);background:rgba(0,229,255,.14);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .32s ease;
}
.faq-a-inner{
  padding:0 22px 20px;
  color:var(--muted);
  font-size:15px;
  line-height:1.85;
}

/* ============ CTA band ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid rgba(0,229,255,.28);
  background:linear-gradient(120deg,rgba(0,229,255,.14),rgba(30,107,255,.16) 45%,rgba(124,77,255,.16));
  padding:52px 46px;
  box-shadow:0 16px 50px rgba(0,0,0,.4),var(--glow);
}
.cta-band::after{
  content:"";position:absolute;right:-90px;top:-90px;
  width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,229,255,.30),transparent 68%);
}
.cta-band h2{font-size:clamp(23px,2.6vw,32px);margin-bottom:12px;position:relative;z-index:2;}
.cta-band p{color:#CFE6FF;max-width:660px;position:relative;z-index:2;margin-bottom:24px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:2;}

/* ============ Contact form card ============ */
.form-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:30px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13.5px;color:var(--muted);margin-bottom:8px;}
.field input,.field textarea{
  width:100%;
  padding:13px 15px;
  border-radius:var(--r-sm);
  background:rgba(2,6,17,.65);
  border:1px solid var(--line);
  color:var(--text);
  transition:border-color .22s ease,box-shadow .22s ease;
}
.field input::placeholder,.field textarea::placeholder{color:rgba(159,178,212,.6);}
.field input:focus,.field textarea:focus{
  outline:none;
  border-color:rgba(0,229,255,.6);
  box-shadow:0 0 0 3px rgba(0,229,255,.14),0 0 22px rgba(0,229,255,.18);
}
.field textarea{min-height:110px;resize:vertical;}
.agree{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:var(--muted);margin:4px 0 20px;}
.agree input{width:18px;height:18px;margin-top:3px;accent-color:#00E5FF;}
.form-note{font-size:12.5px;color:var(--muted);margin:14px 0 0;}
.contact-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:38px;align-items:start;}

/* ============ Footer ============ */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:20px;
  padding:64px 0 26px;
  background:linear-gradient(180deg,rgba(2,6,17,.2),var(--bg-deep));
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-col p{color:var(--muted);font-size:14px;line-height:1.8;}
.footer-col h4{font-size:15.5px;margin-bottom:16px;color:var(--text);}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:var(--muted);font-size:14px;}
.footer-links a:hover{color:var(--cyan);}
.footer-contact li{display:flex;gap:10px;color:var(--muted);font-size:14px;line-height:1.7;}
.footer-contact li i{color:var(--cyan);margin-top:5px;}
.footer-bottom{
  margin-top:42px;padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;
  font-size:13px;color:var(--muted);
}
.footer-bottom a{color:var(--cyan);}

/* ============ Responsive ============ */
@media (max-width:1199px){
  .split{grid-template-columns:290px minmax(0,1fr);gap:28px;}
  .stats{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:1023px){
  .main-nav{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:grid;place-items:center;}
  .mobile-drawer{display:block;}
  .hero-inner{grid-template-columns:1fr;gap:28px;}
  .split{grid-template-columns:1fr;}
  .aside-sticky{position:static;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .section{padding:68px 0;}
}
@media (max-width:767px){
  .tier-card{grid-template-columns:1fr;padding:22px;}
  .tier-side{border-left:0;border-top:1px dashed rgba(255,255,255,.12);padding-left:0;padding-top:18px;}
  .media-card{grid-template-columns:1fr;}
  .media-body{padding:24px;}
  .media-card img{min-height:210px;}
  .cta-band{padding:34px 24px;}
  .page-hero{padding:54px 0 48px;}
  .section{padding:54px 0;}
  .section-head{margin-bottom:30px;}
}
@media (max-width:519px){
  .header-inner{height:66px;}
  .brand-text{font-size:16px;}
  .stats{grid-template-columns:1fr 1fr;gap:12px;}
  .stat{padding:18px 14px;}
  .stat strong{font-size:24px;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
  .cta-actions .btn{width:100%;}
  .flow-item{grid-template-columns:50px minmax(0,1fr);gap:14px;}
  .flow-dot{width:50px;height:50px;border-radius:14px;font-size:17px;}
  .flow-item::before{left:24px;top:50px;}
  .faq-q{font-size:15.5px;padding:16px 18px;}
}

/* roulang page: category3 */
:root{
    --bg:#050A18;
    --bg-deep:#020611;
    --glass:rgba(12,24,48,.68);
    --panel:#0B1730;
    --panel-soft:#0E1C38;
    --primary:#1E6BFF;
    --cyan:#00E5FF;
    --purple:#7C4DFF;
    --success:#22C55E;
    --warn:#F59E0B;
    --text:#EAF2FF;
    --muted:#9FB2D4;
    --line:rgba(255,255,255,.12);
    --line-strong:rgba(0,229,255,.35);
    --radius-lg:24px;
    --radius-md:18px;
    --radius-sm:12px;
    --shadow-card:0 12px 40px rgba(0,0,0,.35);
    --glow-cyan:0 0 28px rgba(0,229,255,.28);
    --glow-blue:0 0 34px rgba(30,107,255,.35);
    --space-section:108px;
    --space-section-sm:64px;
    --container:1240px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:
      radial-gradient(900px 600px at 12% -8%, rgba(0,229,255,.10), transparent 60%),
      radial-gradient(800px 620px at 92% 6%, rgba(124,77,255,.13), transparent 62%),
      linear-gradient(180deg,#050A18 0%, #040915 46%, #020611 100%);
    color:var(--text);
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
    font-size:17px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    background-image:
      linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
    background-size:64px 64px, 64px 64px;
    mask-image:radial-gradient(circle at 50% 20%, rgba(0,0,0,.9), transparent 78%);
    z-index:0;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;transition:color .22s ease, border-color .22s ease, background-color .22s ease, box-shadow .22s ease, transform .22s ease;}
  a:hover{color:var(--cyan);}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4{margin:0 0 16px;font-weight:700;line-height:1.24;letter-spacing:.2px;}
  h1{font-size:clamp(32px,5vw,54px);}
  h2{font-size:clamp(26px,3vw,40px);}
  h3{font-size:clamp(19px,1.6vw,26px);}
  h4{font-size:17px;}
  p{margin:0 0 16px;color:var(--muted);}
  button{font-family:inherit;}
  :focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
  .grid-container{max-width:var(--container);}
  .section{padding:var(--space-section) 0;position:relative;z-index:1;}
  .section-tight{padding:72px 0;position:relative;z-index:1;}
  .section-head{max-width:820px;margin-bottom:52px;}
  .section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;letter-spacing:2px;text-transform:uppercase;
    color:var(--cyan);font-weight:600;margin-bottom:16px;
  }
  .eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--cyan),transparent);border-radius:2px;}
  .lead{font-size:17px;color:var(--muted);max-width:760px;}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:9px;
    padding:14px 30px;border-radius:999px;font-size:16px;font-weight:600;
    border:1px solid transparent;cursor:pointer;line-height:1.2;
    min-height:48px;transition:transform .2s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease, color .2s ease;
  }
  .btn-primary{
    background:linear-gradient(120deg,var(--primary) 0%, #12A0FF 46%, var(--cyan) 100%);
    color:#03101F;box-shadow:var(--glow-blue);font-weight:700;
  }
  .btn-primary:hover{color:#03101F;transform:translateY(-1px);box-shadow:0 0 40px rgba(0,229,255,.5);}
  .btn-primary:active{transform:translateY(1px);box-shadow:0 0 18px rgba(0,229,255,.35);}
  .btn-ghost{
    background:rgba(255,255,255,.05);color:var(--text);border-color:var(--line);
    backdrop-filter:blur(10px);
  }
  .btn-ghost:hover{color:var(--cyan);border-color:var(--line-strong);box-shadow:var(--glow-cyan);transform:translateY(-1px);}
  .btn-ghost:active{transform:translateY(1px);}
  .btn-sm{padding:10px 20px;font-size:14px;min-height:40px;}
  .btn-block{width:100%;}
  .btn-row{display:flex;flex-wrap:wrap;gap:14px;}

  /* ============ 徽章 ============ */
  .badge{
    display:inline-flex;align-items:center;gap:7px;
    padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;
    background:rgba(12,24,48,.7);border:1px solid var(--line-strong);color:var(--cyan);
    backdrop-filter:blur(8px);letter-spacing:.4px;
  }
  .badge-purple{border-color:rgba(124,77,255,.42);color:#C4B0FF;}
  .badge-muted{border-color:var(--line);color:var(--muted);}

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(4,9,21,.82);
    backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{
    display:flex;align-items:center;justify-content:space-between;
    gap:20px;min-height:74px;
  }
  .brand{display:inline-flex;align-items:center;gap:11px;flex-shrink:0;}
  .brand-mark{
    width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
    background:linear-gradient(135deg,var(--primary),var(--cyan));
    color:#03101F;font-weight:800;font-size:19px;
    box-shadow:var(--glow-cyan);
  }
  .brand-text{font-size:19px;font-weight:700;letter-spacing:.5px;color:var(--text);}
  .brand-text em{font-style:normal;color:var(--cyan);}
  .main-nav{display:flex;align-items:center;gap:6px;}
  .nav-link{
    position:relative;padding:10px 14px;border-radius:999px;
    font-size:15px;color:var(--muted);font-weight:500;white-space:nowrap;
  }
  .nav-link:hover{color:var(--text);background:rgba(255,255,255,.055);}
  .nav-link.is-active{color:var(--cyan);background:rgba(0,229,255,.08);}
  .nav-link.is-active::after{
    content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
    width:18px;height:2px;border-radius:2px;background:var(--cyan);
    box-shadow:0 0 12px rgba(0,229,255,.9);
  }
  .header-actions{display:flex;align-items:center;gap:12px;}
  .nav-toggle{
    display:none;width:44px;height:44px;border-radius:12px;
    background:rgba(255,255,255,.06);border:1px solid var(--line);color:var(--text);
    font-size:18px;cursor:pointer;
  }
  .nav-toggle:hover{border-color:var(--line-strong);color:var(--cyan);}
  .mobile-drawer{
    display:none;border-top:1px solid var(--line);
    background:rgba(4,9,21,.97);padding:14px 20px 22px;
  }
  .mobile-drawer.is-open{display:block;}
  .mobile-drawer a{
    display:block;padding:15px 14px;border-radius:14px;font-size:17px;
    color:var(--text);border:1px solid transparent;margin-bottom:8px;
  }
  .mobile-drawer a:hover{background:rgba(255,255,255,.05);color:var(--cyan);}
  .mobile-drawer a.is-active{color:var(--cyan);border-color:var(--line-strong);background:rgba(0,229,255,.07);}

  /* ============ 内页小 Banner ============ */
  .page-hero{
    position:relative;padding:112px 0 84px;overflow:hidden;
    background-image:
      linear-gradient(180deg, rgba(2,6,17,.86) 0%, rgba(4,9,21,.93) 55%, rgba(2,6,17,.98) 100%),
      url("/assets/images/backpic/back-2.png");
    background-size:cover;background-position:center;
    border-bottom:1px solid var(--line);
  }
  .page-hero::after{
    content:"";position:absolute;right:-120px;top:-90px;width:460px;height:460px;
    background:radial-gradient(circle, rgba(0,229,255,.22), transparent 68%);
    pointer-events:none;
  }
  .page-hero .grid-container{position:relative;z-index:2;}
  .crumb{font-size:14px;color:var(--muted);margin-bottom:20px;display:flex;gap:10px;flex-wrap:wrap;align-items:center;}
  .crumb a:hover{color:var(--cyan);}
  .crumb span{opacity:.5;}
  .page-hero h1{margin-bottom:20px;max-width:900px;}
  .page-hero h1 em{
    font-style:normal;
    background:linear-gradient(100deg,var(--cyan),#8FB8FF 70%);
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .page-hero .lead{font-size:18px;max-width:720px;}
  .hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}

  /* ============ 玻璃卡 / 面板 ============ */
  .glass-card{
    background:var(--glass);border:1px solid var(--line);
    border-radius:var(--radius-lg);box-shadow:var(--shadow-card);
    backdrop-filter:blur(14px);padding:30px;
  }
  .panel{
    background:var(--panel);border:1px solid var(--line);
    border-radius:var(--radius-md);padding:26px;
    transition:border-color .25s ease, transform .25s ease, box-shadow .25s ease;
  }
  .panel:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:0 16px 44px rgba(0,0,0,.4);}

  /* ============ 概览数据条 ============ */
  .stat-strip{
    display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
    background:var(--line);border:1px solid var(--line);border-radius:var(--radius-md);
    overflow:hidden;
  }
  .stat-item{background:var(--panel);padding:26px 24px;}
  .stat-item strong{display:block;font-size:clamp(24px,2.4vw,32px);color:var(--cyan);font-weight:700;letter-spacing:-.5px;}
  .stat-item span{font-size:14px;color:var(--muted);}

  /* ============ 时间线 ============ */
  .timeline{position:relative;padding-left:0;}
  .timeline-item{
    position:relative;display:grid;grid-template-columns:96px 1fr;gap:26px;
    padding-bottom:34px;
  }
  .timeline-item:last-child{padding-bottom:0;}
  .timeline-item::before{
    content:"";position:absolute;left:47px;top:60px;bottom:-6px;width:2px;
    background:linear-gradient(180deg, rgba(0,229,255,.55), rgba(30,107,255,.18) 70%, transparent);
  }
  .timeline-item:last-child::before{display:none;}
  .timeline-node{
    position:relative;z-index:2;width:96px;height:96px;border-radius:26px;
    display:grid;place-items:center;
    background:linear-gradient(150deg, rgba(30,107,255,.26), rgba(0,229,255,.10));
    border:1px solid rgba(0,229,255,.42);
    box-shadow:0 0 26px rgba(0,229,255,.20), inset 0 0 22px rgba(30,107,255,.18);
  }
  .timeline-node b{font-size:26px;font-weight:800;color:var(--cyan);letter-spacing:1px;line-height:1;}
  .timeline-node i{font-size:15px;color:var(--muted);margin-top:6px;}
  .timeline-node .node-inner{display:flex;flex-direction:column;align-items:center;}
  .timeline-body{
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);
    padding:26px 28px;transition:border-color .25s ease, box-shadow .25s ease;
  }
  .timeline-body:hover{border-color:var(--line-strong);box-shadow:0 14px 40px rgba(0,0,0,.4);}
  .timeline-head{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:12px;}
  .timeline-head h3{margin:0;font-size:21px;}
  .timeline-step-tip{font-size:13px;color:var(--cyan);background:rgba(0,229,255,.08);border:1px solid var(--line-strong);padding:4px 12px;border-radius:999px;}
  .check-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;}
  .check-list li{
    display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--muted);
    background:rgba(255,255,255,.045);border:1px solid var(--line);
    padding:6px 13px;border-radius:999px;
  }
  .check-list li i{color:var(--success);font-size:11px;}

  /* ============ 设备图卡 ============ */
  .device-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
  .device-card{
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);
    overflow:hidden;display:flex;flex-direction:column;
    transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  }
  .device-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 18px 46px rgba(0,0,0,.45);}
  .device-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:#061024;}
  .device-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
  .device-card:hover .device-thumb img{transform:scale(1.05);}
  .device-thumb::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg, rgba(2,6,17,.05), rgba(2,6,17,.72));
  }
  .device-tag{
    position:absolute;left:14px;top:14px;z-index:2;
    font-size:12px;padding:5px 12px;border-radius:999px;
    background:rgba(2,6,17,.72);border:1px solid var(--line-strong);color:var(--cyan);
    backdrop-filter:blur(6px);
  }
  .device-body{padding:20px 22px 24px;flex:1;display:flex;flex-direction:column;}
  .device-body h3{font-size:19px;margin-bottom:8px;}
  .device-body p{font-size:15px;margin-bottom:16px;}
  .device-body .mini-link{margin-top:auto;font-size:14px;font-weight:600;color:var(--cyan);display:inline-flex;align-items:center;gap:8px;}
  .device-body .mini-link:hover{gap:12px;}

  /* ============ 入口按钮区 ============ */
  .entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
  .entry-card{
    position:relative;overflow:hidden;
    background:linear-gradient(160deg, rgba(30,107,255,.16), rgba(12,24,48,.72));
    border:1px solid var(--line);border-radius:var(--radius-lg);
    padding:32px 30px;display:flex;flex-direction:column;gap:14px;
    transition:border-color .25s ease, transform .25s ease, box-shadow .25s ease;
  }
  .entry-card:hover{border-color:var(--line-strong);transform:translateY(-4px);box-shadow:0 18px 50px rgba(0,0,0,.45);}
  .entry-card .entry-icon{
    width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
    background:rgba(0,229,255,.10);border:1px solid var(--line-strong);
    color:var(--cyan);font-size:21px;
  }
  .entry-card h3{font-size:20px;margin-bottom:6px;}
  .entry-card p{font-size:15px;margin-bottom:8px;}
  .entry-card .btn{margin-top:auto;align-self:flex-start;}

  /* ============ CTA ============ */
  .cta-band{
    position:relative;overflow:hidden;
    background:
      linear-gradient(120deg, rgba(4,10,26,.94), rgba(8,20,44,.9)),
      url("/assets/images/backpic/back-3.png") center/cover;
    border:1px solid var(--line-strong);border-radius:var(--radius-lg);
    padding:52px 48px;
    display:grid;grid-template-columns:1.35fr 1fr;gap:36px;align-items:center;
    box-shadow:0 20px 60px rgba(0,0,0,.5);
  }
  .cta-band::before{
    content:"";position:absolute;right:-100px;bottom:-140px;width:420px;height:420px;
    background:radial-gradient(circle, rgba(124,77,255,.28), transparent 68%);
  }
  .cta-band > *{position:relative;z-index:2;}
  .cta-band h2{margin-bottom:14px;}
  .cta-band p{color:#C6D5F0;margin-bottom:0;}
  .contact-card{
    background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-md);
    padding:26px;backdrop-filter:blur(14px);
  }
  .contact-card h4{margin-bottom:14px;font-size:17px;}
  .contact-card ul li{
    display:flex;gap:11px;align-items:flex-start;font-size:15px;color:var(--muted);
    padding:9px 0;border-bottom:1px dashed rgba(255,255,255,.09);
  }
  .contact-card ul li:last-child{border-bottom:none;}
  .contact-card ul li i{color:var(--cyan);margin-top:5px;font-size:13px;}

  /* ============ FAQ ============ */
  .faq-wrap{max-width:900px;margin:0 auto;}
  .faq-accordion{border:none;background:transparent;}
  .faq-accordion .accordion-item{
    background:var(--glass);border:1px solid var(--line)!important;
    border-radius:var(--radius-md);margin-bottom:16px;overflow:hidden;
    backdrop-filter:blur(12px);transition:border-color .25s ease, box-shadow .25s ease;
  }
  .faq-accordion .accordion-item.is-active{border-color:var(--line-strong)!important;box-shadow:var(--glow-cyan);}
  .faq-accordion .accordion-title{
    background:transparent!important;border:none!important;
    padding:20px 56px 20px 24px!important;
    font-size:17px;font-weight:600;color:var(--text)!important;
    display:flex;align-items:center;gap:12px;position:relative;
  }
  .faq-accordion .accordion-title:hover{color:var(--cyan)!important;}
  .faq-accordion .accordion-title .faq-icon{
    position:absolute;right:22px;top:50%;transform:translateY(-50%);
    color:var(--cyan);font-size:14px;transition:transform .3s ease;
  }
  .faq-accordion .accordion-item.is-active .accordion-title .faq-icon{transform:translateY(-50%) rotate(180deg);}
  .faq-accordion .accordion-content{
    background:transparent!important;color:var(--muted)!important;
    border-top:1px solid var(--line)!important;
    padding:18px 24px 22px!important;font-size:16px;line-height:1.8;
  }
  .faq-accordion .accordion-content p:last-child{margin-bottom:0;}

  /* ============ 相关链接 ============ */
  .link-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
  .link-card{
    display:flex;align-items:center;gap:16px;
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-md);
    padding:22px 24px;transition:border-color .25s ease, transform .25s ease;
  }
  .link-card:hover{border-color:var(--line-strong);transform:translateX(4px);}
  .link-card i{font-size:19px;color:var(--cyan);}
  .link-card b{display:block;font-size:16px;color:var(--text);font-weight:600;}
  .link-card span{font-size:13px;color:var(--muted);}

  /* ============ 页脚 ============ */
  .site-footer{
    background:linear-gradient(180deg, #03070F 0%, #020611 100%);
    border-top:1px solid var(--line);padding:72px 0 28px;position:relative;z-index:1;
  }
  .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px;}
  .footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:18px;}
  .footer-col p{font-size:15px;line-height:1.8;}
  .footer-col h4{font-size:16px;margin-bottom:18px;color:var(--text);}
  .footer-links li{margin-bottom:12px;}
  .footer-links a{font-size:15px;color:var(--muted);}
  .footer-links a:hover{color:var(--cyan);}
  .footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--muted);}
  .footer-contact li i{color:var(--cyan);margin-top:5px;font-size:13px;}
  .footer-bottom{
    margin-top:52px;padding-top:24px;border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
    font-size:14px;color:var(--muted);
  }
  .footer-bottom a{color:var(--cyan);}

  /* ============ 响应式 ============ */
  @media screen and (max-width:1199px){
    .main-nav{gap:2px;}
    .nav-link{padding:9px 11px;font-size:14px;}
    .device-grid{grid-template-columns:repeat(3,1fr);}
    .stat-strip{grid-template-columns:repeat(2,1fr);}
  }
  @media screen and (max-width:1023px){
    :root{--space-section:82px;}
    .main-nav{display:none;}
    .nav-toggle{display:grid;place-items:center;}
    .header-actions .btn-sm{display:none;}
    .device-grid{grid-template-columns:repeat(2,1fr);}
    .entry-grid{grid-template-columns:1fr;}
    .link-grid{grid-template-columns:repeat(2,1fr);}
    .cta-band{grid-template-columns:1fr;padding:40px 30px;}
    .footer-grid{grid-template-columns:repeat(2,1fr);gap:30px;}
    .timeline-item{grid-template-columns:76px 1fr;gap:18px;}
    .timeline-node{width:76px;height:76px;border-radius:20px;}
    .timeline-node b{font-size:21px;}
    .timeline-item::before{left:37px;}
  }
  @media screen and (max-width:639px){
    :root{--space-section:60px;}
    body{font-size:16px;}
    .page-hero{padding:78px 0 60px;}
    .section-head{margin-bottom:34px;}
    .stat-strip{grid-template-columns:1fr;}
    .device-grid{grid-template-columns:1fr;}
    .link-grid{grid-template-columns:1fr;}
    .timeline-item{grid-template-columns:1fr;gap:14px;padding-bottom:26px;}
    .timeline-item::before{display:none;}
    .timeline-node{width:64px;height:64px;border-radius:18px;}
    .timeline-node b{font-size:19px;}
    .timeline-node i{display:none;}
    .glass-card{padding:22px;}
    .panel{padding:20px;}
    .timeline-body{padding:20px;}
    .cta-band{padding:32px 20px;}
    .btn{padding:13px 22px;font-size:15px;width:100%;}
    .btn-row .btn{width:100%;}
    .entry-card .btn{align-self:stretch;}
    .footer-grid{grid-template-columns:1fr;}
    .footer-bottom{flex-direction:column;}
  }

/* roulang page: category4 */
:root{
  --bg:#050A18;
  --bg-deep:#020611;
  --glass:rgba(12,24,48,.68);
  --glass-strong:rgba(10,20,42,.86);
  --panel:#0B1730;
  --panel-2:#0E1D3A;
  --primary:#1E6BFF;
  --cyan:#00E5FF;
  --purple:#7C4DFF;
  --success:#22C55E;
  --warn:#F59E0B;
  --text:#EAF2FF;
  --muted:#9FB2D4;
  --line:rgba(255,255,255,.12);
  --line-strong:rgba(0,229,255,.35);
  --radius-xl:24px;
  --radius-lg:22px;
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 12px 40px rgba(0,0,0,.35);
  --shadow-deep:0 24px 70px rgba(0,0,0,.5);
  --glow:0 0 28px rgba(0,229,255,.28);
  --glow-strong:0 0 42px rgba(0,229,255,.42);
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  --mono:"Inter","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:
    radial-gradient(900px 620px at 10% -6%, rgba(0,229,255,.10), transparent 62%),
    radial-gradient(880px 640px at 94% 6%, rgba(124,77,255,.13), transparent 64%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 20%, #000 0%, transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 20%, #000 0%, transparent 78%);
}
img{max-width:100%;display:block;border:0;}
a{color:var(--cyan);text-decoration:none;transition:color .22s ease,opacity .22s ease;}
a:hover{color:#7ff5ff;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0 0 .6em;font-weight:700;line-height:1.25;color:#fff;letter-spacing:.2px;}
h1{font-size:clamp(32px,5vw,54px);}
h2{font-size:clamp(26px,3vw,40px);}
h3{font-size:clamp(18px,2vw,24px);}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:rgba(0,229,255,.32);color:#fff;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}

.grid-container{max-width:1240px;}
.section{padding:clamp(56px,8vw,112px) 0;position:relative;z-index:1;}
.section-tight{padding:clamp(44px,6vw,80px) 0;position:relative;z-index:1;}
.section-head{max-width:760px;margin:0 auto clamp(32px,4vw,52px);text-align:center;}
.section-head.left{margin-left:0;text-align:left;}
.section-head p{color:var(--muted);margin:0;font-size:16px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);margin-bottom:14px;font-weight:600;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 30px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;text-align:center;
  transition:transform .2s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease,color .2s ease;
  min-height:48px;line-height:1.2;
}
.btn-primary{
  color:#04121f;
  background:linear-gradient(120deg,var(--cyan),var(--primary));
  box-shadow:var(--glow);
}
.btn-primary:hover{color:#04121f;box-shadow:var(--glow-strong);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 16px rgba(0,229,255,.3);}
.btn-ghost{
  color:var(--text);
  background:rgba(255,255,255,.04);
  border-color:var(--line);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.btn-ghost:hover{color:#fff;border-color:var(--line-strong);box-shadow:0 0 20px rgba(0,229,255,.18);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{padding:10px 22px;font-size:14px;min-height:42px;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 14px;border-radius:999px;font-size:12.5px;font-weight:600;
  color:var(--cyan);background:rgba(0,229,255,.08);
  border:1px solid rgba(0,229,255,.28);
}
.badge.purple{color:#c3acff;background:rgba(124,77,255,.12);border-color:rgba(124,77,255,.34);}
.badge.muted{color:var(--muted);background:rgba(255,255,255,.05);border-color:var(--line);}
.badge.status-live{color:#7ff0ae;background:rgba(34,197,94,.12);border-color:rgba(34,197,94,.34);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,10,24,.78);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
}
.header-inner{
  display:flex;align-items:center;gap:28px;
  min-height:76px;
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{
  width:40px;height:40px;border-radius:13px;flex:0 0 auto;
  display:grid;place-items:center;
  font-weight:800;font-size:19px;color:#03101d;
  background:linear-gradient(135deg,var(--cyan),var(--primary));
  box-shadow:0 0 20px rgba(0,229,255,.34);
}
.brand-text{font-size:19px;font-weight:700;color:#fff;letter-spacing:.4px;white-space:nowrap;}
.brand-text em{font-style:normal;color:var(--cyan);}
.brand:hover .brand-text{color:#fff;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto;flex-wrap:wrap;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:10px 14px;border-radius:999px;
  font-size:14.5px;font-weight:500;color:var(--muted);
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.05);}
.nav-link.is-active{color:var(--cyan);background:rgba(0,229,255,.08);}
.nav-link.is-active::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:18px;height:2px;border-radius:2px;background:var(--cyan);
  box-shadow:0 0 10px rgba(0,229,255,.8);
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:46px;height:46px;border-radius:14px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  cursor:pointer;padding:0;place-items:center;
}
.nav-toggle span{display:block;width:19px;height:2px;background:var(--text);border-radius:2px;margin:2.5px auto;transition:transform .25s ease,opacity .25s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5px) rotate(-45deg);}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);
  background:rgba(4,9,22,.97);
  padding:14px 20px 26px;
}
.mobile-drawer.is-open{display:block;animation:drawerIn .25s ease;}
@keyframes drawerIn{from{opacity:0;transform:translateY(-8px);}to{opacity:1;transform:none;}}
.mobile-drawer .nav-link{
  display:flex;justify-content:space-between;
  padding:15px 14px;font-size:16px;border-radius:14px;
}
.mobile-drawer .btn{margin-top:14px;}

/* ---------- 页头横幅 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:clamp(64px,9vw,116px) 0 clamp(54px,7vw,92px);
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.png);
  background-size:cover;background-position:center;
  opacity:.34;
  filter:saturate(1.05);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg, rgba(5,10,24,.72) 0%, rgba(5,10,24,.9) 62%, var(--bg) 100%),
    radial-gradient(700px 400px at 82% 15%, rgba(124,77,255,.22), transparent 65%),
    radial-gradient(600px 360px at 10% 80%, rgba(0,229,255,.14), transparent 68%);
}
.page-hero .grid-container{position:relative;z-index:2;}
.crumbs{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--muted);margin-bottom:22px;flex-wrap:wrap;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--cyan);}
.crumbs .sep{opacity:.5;}
.crumbs .current{color:var(--cyan);}
.page-hero h1{margin-bottom:18px;max-width:860px;}
.page-hero h1 em{font-style:normal;color:var(--cyan);}
.page-hero .lead{max-width:720px;color:var(--muted);font-size:17px;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.meta-chip{
  display:inline-flex;align-items:center;gap:9px;
  padding:10px 18px;border-radius:999px;font-size:13.5px;color:var(--muted);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.meta-chip i{color:var(--cyan);}

/* ---------- 通道卡 ---------- */
.channel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.channel-card{
  background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:28px 24px;
  box-shadow:var(--shadow);position:relative;overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.channel-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(0,229,255,.7),transparent);
  opacity:0;transition:opacity .25s ease;
}
.channel-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 20px 50px rgba(0,0,0,.45),0 0 24px rgba(0,229,255,.14);}
.channel-card:hover::before{opacity:1;}
.channel-icon{
  width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
  font-size:20px;color:var(--cyan);
  background:rgba(0,229,255,.09);border:1px solid rgba(0,229,255,.26);
  margin-bottom:18px;
}
.channel-card h3{font-size:18.5px;margin-bottom:10px;}
.channel-card p{color:var(--muted);font-size:14.5px;margin-bottom:16px;}
.channel-list li{
  display:flex;gap:9px;align-items:flex-start;
  font-size:14px;color:var(--muted);padding:5px 0;
}
.channel-list i{color:var(--cyan);font-size:12px;margin-top:6px;}

/* ---------- 面板 ---------- */
.panel{
  background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius-xl);padding:clamp(24px,3vw,38px);
  box-shadow:var(--shadow);
}
.glass{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-xl);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow-deep);
}

/* ---------- FAQ 矩阵 ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start;}
.faq-group{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:26px 24px;
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow);
}
.faq-group-head{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.faq-group-head .num{
  width:38px;height:38px;border-radius:12px;flex:0 0 auto;
  display:grid;place-items:center;font-size:14px;font-weight:700;font-family:var(--mono);
  color:#04121f;background:linear-gradient(135deg,var(--cyan),var(--primary));
  box-shadow:0 0 18px rgba(0,229,255,.32);
}
.faq-group-head h3{margin:0;font-size:18px;}
.faq-group-head span.sub{display:block;font-size:12.5px;color:var(--muted);font-weight:400;margin-top:2px;}
.accordion{background:transparent;border:0;margin:0;}
.accordion-item{border:0;background:transparent;}
.accordion-item + .accordion-item{border-top:1px solid var(--line);}
.accordion-title{
  border:0;background:transparent;
  padding:16px 40px 16px 0;
  color:var(--text);font-size:15.5px;font-weight:600;line-height:1.5;
  position:relative;transition:color .2s ease;
}
.accordion-title:hover,.accordion-title:focus{background:transparent;color:var(--cyan);}
.accordion-title::before{
  content:"\f078";
  font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;right:6px;top:22px;
  font-size:11px;color:var(--cyan);transform:none;
  transition:transform .3s ease;margin:0;
}
.accordion-item.is-active .accordion-title::before{transform:rotate(180deg);}
.accordion-item.is-active .accordion-title{color:var(--cyan);}
.accordion-content{
  background:transparent;border:0;padding:0 0 18px;
  color:var(--muted);font-size:14.5px;line-height:1.8;
}
.accordion-content p:last-child{margin-bottom:0;}
.accordion-content ul li{position:relative;padding-left:16px;margin-bottom:6px;}
.accordion-content ul li::before{
  content:"";position:absolute;left:0;top:11px;width:5px;height:5px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 8px rgba(0,229,255,.8);
}

/* ---------- 咨询区 ---------- */
.support-grid{display:grid;grid-template-columns:1.35fr .85fr;gap:26px;align-items:start;}
.form-card{padding:clamp(24px,3vw,40px);}
.field{margin-bottom:20px;}
.field label{
  display:block;font-size:13.5px;font-weight:600;color:var(--text);
  margin-bottom:9px;letter-spacing:.2px;
}
.field label .req{color:var(--cyan);margin-left:4px;}
.field input,.field select,.field textarea{
  width:100%;padding:13px 16px;
  background:rgba(3,8,20,.75);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  color:var(--text);font-size:15px;font-family:inherit;
  transition:border-color .22s ease,box-shadow .22s ease,background .22s ease;
}
.field textarea{min-height:126px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:#6a7d9e;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:rgba(0,229,255,.6);
  box-shadow:0 0 0 3px rgba(0,229,255,.13),0 0 22px rgba(0,229,255,.18);
  background:rgba(3,8,20,.92);
}
.field select option{background:#0B1730;color:var(--text);}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:rgba(245,158,11,.75);box-shadow:0 0 0 3px rgba(245,158,11,.12);}
.field-error{display:none;font-size:12.5px;color:var(--warn);margin-top:7px;}
.field.has-error .field-error{display:block;}
.check-row{display:flex;align-items:flex-start;gap:11px;margin:4px 0 24px;}
.check-row input{width:18px;height:18px;margin-top:3px;accent-color:#00E5FF;flex:0 0 auto;}
.check-row label{font-size:13.5px;color:var(--muted);line-height:1.65;margin:0;font-weight:400;}
.form-note{
  display:none;margin-top:16px;padding:13px 16px;border-radius:var(--radius-sm);
  font-size:14px;border:1px solid transparent;
}
.form-note.ok{display:block;color:#8ff0b6;background:rgba(34,197,94,.1);border-color:rgba(34,197,94,.35);}
.form-note.err{display:block;color:#ffd08a;background:rgba(245,158,11,.1);border-color:rgba(245,158,11,.35);}
.contact-aside{
  padding:clamp(22px,3vw,32px);
  position:sticky;top:100px;
}
.contact-aside h3{font-size:19px;margin-bottom:16px;}
.contact-line{
  display:flex;gap:13px;align-items:flex-start;
  padding:15px 0;border-bottom:1px dashed var(--line);
}
.contact-line:last-of-type{border-bottom:0;}
.contact-line i{
  width:38px;height:38px;border-radius:12px;flex:0 0 auto;
  display:grid;place-items:center;font-size:15px;color:var(--cyan);
  background:rgba(0,229,255,.08);border:1px solid rgba(0,229,255,.24);
}
.contact-line strong{display:block;font-size:14.5px;color:#fff;margin-bottom:3px;}
.contact-line span{font-size:13.5px;color:var(--muted);}
.aside-tip{
  margin-top:22px;padding:16px;border-radius:var(--radius);
  background:rgba(124,77,255,.1);border:1px solid rgba(124,77,255,.3);
  font-size:13.5px;color:#d3c6ff;line-height:1.75;
}
.aside-tip i{color:#c3acff;margin-right:6px;}

/* ---------- 相关链接卡 ---------- */
.link-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.link-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.link-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 22px 55px rgba(0,0,0,.48);}
.link-card .thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:#081226;}
.link-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;opacity:.86;}
.link-card:hover .thumb img{transform:scale(1.03);opacity:1;}
.link-card .thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,24,.1),rgba(5,10,24,.72));
}
.link-card .body{padding:22px 22px 26px;display:flex;flex-direction:column;flex:1;}
.link-card .body .badge{align-self:flex-start;margin-bottom:14px;}
.link-card h3{font-size:18px;margin-bottom:10px;}
.link-card p{color:var(--muted);font-size:14.5px;margin-bottom:18px;}
.link-card .go{
  margin-top:auto;display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--cyan);
}
.link-card .go i{transition:transform .25s ease;}
.link-card:hover .go i{transform:translateX(4px);}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--radius-xl);
  border:1px solid rgba(0,229,255,.26);
  background:
    radial-gradient(560px 300px at 88% 12%, rgba(124,77,255,.28), transparent 66%),
    radial-gradient(520px 300px at 6% 90%, rgba(0,229,255,.18), transparent 68%),
    linear-gradient(140deg,rgba(14,29,58,.95),rgba(5,10,24,.96));
  padding:clamp(32px,5vw,60px);
  box-shadow:var(--shadow-deep);
  text-align:center;
}
.cta-band h2{max-width:760px;margin:0 auto 16px;}
.cta-band p{max-width:640px;margin:0 auto 30px;color:var(--muted);}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,6vw,80px);
  background:var(--bg-deep);
  border-top:1px solid var(--line);
  padding:clamp(48px,6vw,78px) 0 0;
  position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-mark{width:38px;height:38px;font-size:18px;}
.footer-brand .brand-text{font-size:18px;}
.footer-col p{color:var(--muted);font-size:14px;margin-bottom:16px;}
.footer-col h4{
  font-size:15px;color:#fff;margin-bottom:18px;letter-spacing:.4px;
  position:relative;padding-bottom:10px;
}
.footer-col h4::after{
  content:"";position:absolute;left:0;bottom:0;width:26px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),transparent);
}
.footer-links li{margin-bottom:11px;}
.footer-links a{color:var(--muted);font-size:14px;}
.footer-links a:hover{color:var(--cyan);}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;color:var(--muted);font-size:14px;line-height:1.7;}
.footer-contact i{color:var(--cyan);margin-top:5px;font-size:13px;}
.footer-bottom{
  margin-top:clamp(34px,4vw,54px);
  padding:22px 0;
  border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
.footer-bottom a{color:var(--muted);}
.footer-bottom a:hover{color:var(--cyan);}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1199px){
  .channel-grid{grid-template-columns:repeat(2,1fr);}
  .faq-grid{grid-template-columns:repeat(2,1fr);}
  .link-grid{grid-template-columns:repeat(3,1fr);}
}
@media screen and (max-width:1023px){
  .main-nav{display:none;}
  .nav-toggle{display:grid;}
  .header-actions .btn{display:none;}
  .support-grid{grid-template-columns:1fr;}
  .contact-aside{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media screen and (max-width:767px){
  .section{padding:56px 0;}
  .channel-grid{grid-template-columns:1fr;}
  .faq-grid{grid-template-columns:1fr;}
  .link-grid{grid-template-columns:1fr;}
  .page-hero{padding:56px 0 50px;}
  .page-hero .lead{font-size:15.5px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .hero-actions .btn{width:100%;}
}
@media screen and (max-width:520px){
  body{font-size:15.5px;}
  .brand-text{font-size:16.5px;}
  .header-inner{min-height:66px;gap:12px;}
  .brand-mark{width:36px;height:36px;font-size:17px;border-radius:11px;}
  .btn{padding:13px 22px;font-size:14.5px;}
  .panel{padding:22px 18px;}
  .faq-group{padding:20px 18px;}
  .meta-chip{width:100%;justify-content:center;}
}