/* roulang page: index */
:root{
  --bg:#060B16;
  --bg-2:#0A1122;
  --primary:#2F7CFF;
  --cyan:#37E6D0;
  --accent:#C6FF4F;
  --text:#E8EEF9;
  --muted:#9AA9C2;
  --line:rgba(255,255,255,.12);
  --glass:rgba(255,255,255,.06);
  --r-card:16px;
  --r-table:20px;
  --r-btn:12px;
  --shadow-1:0 10px 30px rgba(0,0,0,.35);
  --shadow-2:0 18px 45px rgba(47,124,255,.28);
  --shadow-glow:0 0 0 1px rgba(55,230,208,.45), 0 12px 34px rgba(47,124,255,.45);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --mono:ui-monospace,"Roboto Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;line-height:1.85;
  letter-spacing:.004em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;background:none;border:0;color:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-0.01em;line-height:1.3;}
p{margin:0;}
ul,ol,dl,dd{margin:0;padding:0;list-style:none;}
time{font-family:var(--mono);font-variant-numeric:tabular-nums;}
::selection{background:rgba(47,124,255,.4);color:#fff;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{position:relative;padding:92px 0;}
.section-alt{background:linear-gradient(180deg,rgba(10,17,34,0) 0%,rgba(10,17,34,.85) 40%,rgba(10,17,34,0) 100%);}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.12em;color:var(--cyan);
  text-transform:uppercase;margin-bottom:14px;
}
.sec-kicker::before{content:"";width:22px;height:1px;background:var(--cyan);display:inline-block;}
.sec-head h2{font-size:clamp(22px,2.6vw,32px);margin-bottom:16px;}
.sec-head p{color:var(--muted);font-size:16px;max-width:700px;}
.sec-head.center p{margin:0 auto;}

.glass{
  position:relative;
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
}
.glass::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.5),transparent);
  pointer-events:none;
}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  .glass{background:rgba(10,17,34,.92);}
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease,filter .22s ease;
}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-primary{
  background:linear-gradient(135deg,var(--primary) 10%,var(--cyan) 100%);
  color:#fff;box-shadow:var(--shadow-glow);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(198,255,79,.6),0 16px 40px rgba(47,124,255,.5);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:rgba(255,255,255,.03);
  border-color:var(--line);color:var(--text);
}
.btn-ghost:hover{border-color:rgba(55,230,208,.7);color:#fff;transform:translateY(-2px);box-shadow:0 12px 30px rgba(47,124,255,.22);}
.btn-ghost:active{transform:translateY(1px);}
.btn-block{width:100%;}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12px;line-height:1.6;letter-spacing:.02em;
  background:rgba(255,255,255,.06);
  border:1px solid var(--line);
  color:var(--muted);
}
.badge-glow{
  color:var(--cyan);
  border-color:rgba(55,230,208,.42);
  background:rgba(55,230,208,.08);
  box-shadow:0 0 18px rgba(55,230,208,.18) inset;
}
.badge-hot{
  color:#0B1400;
  background:var(--accent);
  border-color:var(--accent);
  font-weight:700;
  box-shadow:0 0 16px rgba(198,255,79,.35);
}

/* ---------- header ---------- */
.site-header{
  position:absolute;top:0;left:0;right:0;z-index:80;
  padding:14px 0;
  background:rgba(6,11,22,.28);
  border-bottom:1px solid rgba(255,255,255,.07);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  transition:background .22s ease,padding .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.site-header.is-stuck{
  position:fixed;
  background:rgba(6,11,22,.95);
  padding:8px 0;
  border-bottom-color:var(--line);
  box-shadow:0 12px 34px rgba(0,0,0,.5);
}
.nav-inner{display:flex;align-items:center;gap:28px;}
.brand{
  font-size:18px;font-weight:800;letter-spacing:-0.01em;
  color:#fff;white-space:nowrap;
  display:inline-flex;align-items:center;gap:10px;
}
.brand span.dot{
  width:8px;height:8px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--cyan));
  box-shadow:0 0 12px rgba(55,230,208,.85);
  flex:0 0 auto;
}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-links a{
  position:relative;
  padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--muted);
  transition:color .2s ease,background .2s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:50%;bottom:2px;height:2px;width:0;
  background:var(--cyan);border-radius:2px;transform:translateX(-50%);
  transition:width .22s ease;
}
.nav-links a:hover{color:#fff;}
.nav-links a:hover::after{width:60%;}
.nav-links a.active{color:#fff;}
.nav-links a.active::after{width:60%;background:var(--primary);}
.nav-links a.active::before{
  content:"";position:absolute;left:4px;top:50%;transform:translateY(-50%);
  width:5px;height:5px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 10px rgba(55,230,208,.9);
}
.nav-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:40px;height:40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  color:var(--muted);transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.icon-btn:hover{color:#fff;border-color:rgba(55,230,208,.6);background:rgba(55,230,208,.08);}
.nav-search{display:none;align-items:center;gap:8px;}
.nav-search.open{display:flex;}
.nav-search input{
  width:180px;padding:9px 14px;border-radius:12px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);
  color:var(--text);font-size:14px;font-family:inherit;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search input::placeholder{color:#6E7C95;}
.nav-search input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(55,230,208,.16);}
.menu-btn{display:none;}
.mobile-panel{
  display:none;
  position:fixed;inset:0;z-index:120;
  background:rgba(6,11,22,.97);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  padding:88px 24px 32px;
  flex-direction:column;gap:6px;
}
.mobile-panel.open{display:flex;}
.mobile-panel a.m-link{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 4px;
  font-size:16px;color:var(--text);
  border-bottom:1px solid var(--line);
}
.mobile-panel a.m-link.active{color:var(--cyan);}
.mobile-panel .m-cta{margin-top:auto;padding-top:22px;}
.mobile-close{
  position:absolute;top:22px;right:24px;
  width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.05);
  display:inline-flex;align-items:center;justify-content:center;color:#fff;
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  min-height:78vh;
  display:flex;align-items:center;
  padding:158px 0 96px;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url(/assets/images/backpic/back-1.webp) center/cover no-repeat;
  opacity:.42;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(900px 520px at 82% 8%,rgba(47,124,255,.34),transparent 66%),
    linear-gradient(180deg,rgba(6,11,22,.74) 0%,rgba(6,11,22,.9) 58%,var(--bg) 100%);
}
.hero-glow{
  position:absolute;width:620px;height:620px;right:-140px;bottom:-200px;
  background:radial-gradient(circle,rgba(55,230,208,.20),transparent 65%);
  pointer-events:none;z-index:1;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.12fr .88fr;gap:56px;align-items:center;
}
.hero-copy h1{
  font-size:clamp(28px,4.2vw,44px);
  line-height:1.2;
  margin:20px 0 18px;
  color:#fff;
}
.hero-sub{
  font-size:17px;color:var(--muted);
  max-width:540px;margin-bottom:30px;
}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;}
.hero-note{
  margin-top:22px;font-size:13px;color:#7C8AA5;max-width:520px;
}
.hero-card{padding:26px 24px 22px;}
.hero-card .card-title{
  font-size:13px;letter-spacing:.14em;color:var(--cyan);
  margin-bottom:6px;
}
.quick-list{margin:0 0 20px;}
.quick-list li{
  display:flex;align-items:baseline;justify-content:space-between;gap:14px;
  padding:14px 0;border-bottom:1px solid var(--line);
}
.quick-list li:last-child{border-bottom:0;}
.q-num{
  font-family:var(--mono);font-size:24px;font-weight:700;
  color:#fff;letter-spacing:-0.02em;
}
.q-lbl{font-size:14px;color:var(--muted);}

/* ---------- compare table ---------- */
.table-wrap{
  border:1px solid var(--line);
  border-radius:var(--r-table);
  background:rgba(10,17,34,.62);
  box-shadow:var(--shadow-1);
  overflow:hidden;
}
.cmp-table{width:100%;border-collapse:collapse;font-size:14px;}
.cmp-table th,.cmp-table td{
  padding:16px 18px;text-align:left;
  border-bottom:1px solid var(--line);
  vertical-align:middle;
}
.cmp-table thead th{
  position:sticky;top:62px;z-index:3;
  background:rgba(10,17,34,.97);
  backdrop-filter:blur(8px);
  color:#fff;font-size:15px;font-weight:700;
  border-bottom:1px solid var(--line);
}
.cmp-table thead th:first-child{font-weight:600;color:var(--muted);font-size:14px;}
.cmp-table tbody tr:last-child td{border-bottom:0;}
.cmp-table tbody tr{transition:background .2s ease;}
.cmp-table tbody tr:hover{background:rgba(47,124,255,.08);}
.cmp-table td:first-child{color:var(--muted);font-size:14px;}
.col-hi{
  background:linear-gradient(180deg,rgba(55,230,208,.16),rgba(55,230,208,.04));
  border-left:1px solid rgba(55,230,208,.3);
  border-right:1px solid rgba(55,230,208,.3);
}
.cmp-table tbody tr:hover .col-hi{background:linear-gradient(180deg,rgba(55,230,208,.24),rgba(55,230,208,.08));}
.ok{color:var(--cyan);font-weight:700;}
.no{color:#5D6B84;}
.val{font-family:var(--mono);color:#fff;font-weight:600;}
.th-inner{display:flex;flex-direction:column;gap:4px;}
.th-inner small{font-weight:400;font-size:12px;color:var(--muted);}
.table-note{
  margin-top:18px;font-size:13px;color:#7C8AA5;line-height:1.8;
}
.compare-cards{display:none;}

/* ---------- level stairs ---------- */
.stair{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:22px;align-items:end;margin-top:12px;
}
.stair-item{
  position:relative;overflow:hidden;
  padding:30px 22px 26px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.stair-item::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.45),transparent);
}
.stair-item .wm{
  position:absolute;right:12px;top:6px;
  font-family:var(--mono);font-size:58px;font-weight:800;
  line-height:1;color:rgba(255,255,255,.06);
  letter-spacing:-0.04em;pointer-events:none;
}
.stair-item:nth-child(1){transform:translateY(0);}
.stair-item:nth-child(2){transform:translateY(-14px);}
.stair-item:nth-child(3){transform:translateY(-28px);}
.stair-item:nth-child(4){transform:translateY(-42px);}
.stair-item:hover{border-color:rgba(55,230,208,.55);box-shadow:var(--shadow-2);}
.stair-item.is-hot{
  border-color:rgba(55,230,208,.6);
  box-shadow:var(--shadow-glow);
  transform:translateY(-42px) scale(1.04);
  background:linear-gradient(180deg,rgba(55,230,208,.12),rgba(255,255,255,.05));
}
.stair-item.is-hot .wm{color:rgba(198,255,79,.16);}
.stair-name{font-size:20px;color:#fff;margin:14px 0 6px;}
.stair-tag{font-size:12px;color:var(--muted);letter-spacing:.08em;font-family:var(--mono);}
.stair-list{margin:18px 0 20px;}
.stair-list li{
  position:relative;padding-left:16px;
  font-size:14px;color:#C8D3E6;line-height:1.9;
}
.stair-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:6px;height:6px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 8px rgba(55,230,208,.7);
}
.stair-cond{
  padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);line-height:1.75;
}

/* ---------- content rail ---------- */
.rail-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
.rail-head .sec-head{margin-bottom:0;}
.rail-scroll{
  display:flex;gap:20px;
  overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 4px 18px;
  scrollbar-width:thin;
}
.rail-scroll::-webkit-scrollbar{height:6px;}
.rail-scroll::-webkit-scrollbar-thumb{background:rgba(255,255,255,.16);border-radius:99px;}
.rail-card{
  flex:0 0 31.2%;
  scroll-snap-align:start;
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.rail-card:hover{transform:translateY(-4px);border-color:rgba(55,230,208,.5);box-shadow:var(--shadow-2);}
.rail-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;}
.rail-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.rail-card:hover .rail-thumb img{transform:scale(1.03);}
.rail-thumb .badge{position:absolute;left:12px;top:12px;background:rgba(6,11,22,.72);color:#fff;}
.rail-body{padding:18px 20px 20px;}
.rail-body h3{font-size:17px;color:#fff;line-height:1.5;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rail-body p{font-size:14px;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rail-more{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:16px;font-size:14px;font-weight:600;color:var(--cyan);
}
.rail-more i{transition:transform .22s ease;}
.rail-card:hover .rail-more i{transform:translateX(4px);}

/* ---------- news list ---------- */
.news-grid{display:grid;grid-template-columns:290px 1fr;gap:56px;}
.news-side{position:sticky;top:96px;align-self:start;}
.news-side h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:14px;}
.news-side p{font-size:15px;color:var(--muted);}
.news-list{border-top:1px solid var(--line);}
.news-item{
  display:block;
  padding:24px 4px;
  border-bottom:1px solid var(--line);
  transition:background .2s ease,padding-left .2s ease;
}
.news-item:hover{background:rgba(47,124,255,.06);padding-left:12px;}
.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:10px;}
.news-meta time{font-size:13px;color:#7C8AA5;}
.news-item h3{font-size:18px;color:#fff;line-height:1.55;margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-item:hover h3{color:var(--cyan);}
.news-item p{font-size:14px;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.empty-state{
  padding:48px 28px;text-align:center;
  border:1px dashed var(--line);border-radius:var(--r-card);
  background:rgba(255,255,255,.03);
}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:18px;}

/* ---------- proof ---------- */
.proof-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.proof-card{padding:28px 24px;border-radius:var(--r-card);background:var(--glass);border:1px solid var(--line);box-shadow:var(--shadow-1);transition:transform .22s ease,border-color .22s ease;}
.proof-card:hover{transform:translateY(-4px);border-color:rgba(55,230,208,.45);}
.proof-num{font-family:var(--mono);font-size:34px;font-weight:800;color:#fff;letter-spacing:-0.03em;}
.proof-num em{font-style:normal;font-size:15px;color:var(--cyan);margin-left:4px;}
.proof-card h3{font-size:16px;margin:12px 0 8px;color:#fff;}
.proof-card p{font-size:14px;color:var(--muted);}

/* ---------- faq ---------- */
.faq-wrap{max-width:880px;margin:0 auto;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 4px;text-align:left;
  font-size:17px;font-weight:600;color:var(--text);
  transition:color .2s ease;
}
.faq-q:hover{color:#fff;}
.faq-icon{
  position:relative;flex:0 0 auto;
  width:22px;height:22px;border-radius:50%;
  border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;
  transition:border-color .2s ease,background .2s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--cyan);border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::before{width:10px;height:1.6px;}
.faq-icon::after{width:1.6px;height:10px;}
.faq-item.open .faq-icon{border-color:rgba(55,230,208,.6);background:rgba(55,230,208,.1);}
.faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease;}
.faq-a p{
  padding:0 4px 24px 8px;
  font-size:15px;line-height:1.8;color:var(--muted);
}
.faq-item.open .faq-a{max-height:360px;}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--r-table);
  border:1px solid rgba(55,230,208,.35);
  box-shadow:0 0 0 1px rgba(47,124,255,.2),0 24px 60px rgba(47,124,255,.28);
  padding:48px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:url(/assets/images/backpic/back-2.webp) center/cover no-repeat;
  opacity:.3;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(6,11,22,.95) 0%,rgba(6,11,22,.82) 55%,rgba(6,11,22,.72) 100%);
}
.cta-band > *{position:relative;z-index:2;}
.cta-copy h2{font-size:clamp(22px,2.4vw,30px);color:#fff;margin-bottom:12px;}
.cta-copy p{font-size:15px;color:var(--muted);max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:0 0 auto;}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:40px;
  padding:72px 0 26px;
  background:linear-gradient(180deg,rgba(10,17,34,0) 0%,rgba(10,17,34,.9) 30%,rgba(6,11,22,1) 100%);
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;}
.footer-brand .fb-logo{font-size:19px;font-weight:800;color:#fff;display:inline-flex;align-items:center;gap:10px;}
.footer-brand .fb-logo span.dot{width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--cyan));box-shadow:0 0 12px rgba(55,230,208,.85);}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--muted);max-width:320px;line-height:1.85;}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:18px;letter-spacing:.04em;}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a{font-size:14px;color:var(--muted);transition:color .2s ease,transform .2s ease;display:inline-block;}
.footer-col ul li a:hover{color:#fff;transform:translateX(2px);}
.footer-note{font-size:12px;color:#7C8AA5;line-height:1.9;}
.footer-note strong{color:#9AA9C2;font-weight:600;display:block;margin-bottom:8px;font-size:12px;}
.footer-bottom{
  margin-top:52px;padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:12px;color:#7C8AA5;
}
.footer-bottom .fb-links{display:flex;gap:18px;flex-wrap:wrap;}
.footer-bottom a:hover{color:#fff;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .section{padding:64px 0;}
  .nav-links{gap:2px;}
  .nav-links a{padding:9px 10px;font-size:14px;}
  .hero{padding:140px 0 80px;}
  .hero-grid{gap:36px;}
  .stair{grid-template-columns:repeat(2,1fr);gap:20px;}
  .stair-item:nth-child(n){transform:none;}
  .stair-item.is-hot{transform:scale(1.02);}
  .rail-card{flex:0 0 44%;}
  .news-grid{grid-template-columns:1fr;gap:32px;}
  .news-side{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .section{padding:52px 0;}
  .nav-links{display:none;}
  .menu-btn{display:inline-flex;}
  .nav-actions .btn{display:none;}
  .hero{padding:112px 0 64px;min-height:auto;}
  .hero-grid{display:flex;flex-direction:column;gap:28px;}
  .hero-copy{order:2;}
  .hero-card{order:1;width:100%;}
  .hero-copy h1{margin:16px 0 14px;}
  .hero-sub{font-size:16px;}
  .hero-btns{flex-direction:column;}
  .hero-btns .btn{width:100%;}
  .table-wrap{display:none;}
  .compare-cards{display:grid;gap:18px;}
  .lvl-card{
    border-radius:var(--r-card);border:1px solid var(--line);
    background:var(--glass);box-shadow:var(--shadow-1);padding:20px;
  }
  .lvl-card.is-hot{border-color:rgba(55,230,208,.55);box-shadow:var(--shadow-glow);}
  .lvl-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;}
  .lvl-head strong{font-size:17px;color:#fff;}
  .lvl-row{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px solid var(--line);font-size:14px;}
  .lvl-row:last-child{border-bottom:0;}
  .lvl-row span:first-child{color:var(--muted);}
  .stair{grid-template-columns:1fr;}
  .stair-item.is-hot{transform:none;}
  .rail-card{flex:0 0 82%;}
  .proof-grid{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px;gap:24px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .brand{font-size:16px;}
  .rail-card{flex:0 0 88%;}
  .sec-head h2{font-size:22px;}
  .faq-q{font-size:16px;padding:20px 2px;}
  .section{padding:48px 0;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --bg:#060B16;
  --bg-2:#0A1122;
  --primary:#2F7CFF;
  --cyan:#37E6D0;
  --accent:#C6FF4F;
  --text:#E8EEF9;
  --body-text:#DCE6F5;
  --muted:#9AA9C2;
  --faint:#7C8AA5;
  --line:rgba(255,255,255,.12);
  --glass:rgba(255,255,255,.06);
  --glass-strong:rgba(10,17,34,.92);
  --radius:16px;
  --radius-lg:20px;
  --radius-sm:12px;
  --shadow-1:0 10px 30px rgba(0,0,0,.35);
  --shadow-2:0 18px 45px rgba(47,124,255,.28);
  --glow:0 0 0 1px rgba(55,230,208,.45),0 12px 34px rgba(47,124,255,.45);
  --container:1200px;
  --read:780px;
  --mono:ui-monospace,"Roboto Mono",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:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:-0.01em;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(900px 520px at 88% -6%, rgba(47,124,255,.20), transparent 62%),
    radial-gradient(680px 420px at 4% 6%, rgba(55,230,208,.10), transparent 60%);
  background-repeat:no-repeat;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:-0.01em;color:#fff;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:72px;display:flex;align-items:center;
  background:rgba(10,17,34,.42);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:height .22s ease,background .22s ease,box-shadow .22s ease;
}
.site-header.scrolled{
  height:60px;
  background:rgba(6,11,22,.95);
  box-shadow:0 10px 30px rgba(0,0,0,.45);
}
.nav-inner{display:flex;align-items:center;gap:18px;width:100%;}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:700;color:#fff;white-space:nowrap;}
.brand .dot,.fb-logo .dot{
  width:10px;height:10px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--cyan));
  box-shadow:0 0 12px rgba(55,230,208,.85);
  flex:0 0 auto;
}
.nav-links{display:flex;align-items:center;gap:4px;margin:0 auto;}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;
  padding:8px 13px;border-radius:10px;
  font-size:15px;color:var(--muted);
  transition:color .2s ease,background .2s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:0;height:2px;border-radius:2px;background:var(--cyan);
  transition:width .22s ease;
}
.nav-links a:hover{color:#fff;}
.nav-links a:hover::after{width:60%;}
.nav-links a.active{color:var(--primary);}
.nav-links a.active::after{width:60%;background:linear-gradient(90deg,var(--primary),var(--cyan));}
.nav-links a.active::before{
  content:"";position:absolute;top:7px;right:4px;width:5px;height:5px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 9px var(--cyan);
}
.nav-actions{display:flex;align-items:center;gap:10px;}
.nav-search input{
  width:190px;padding:9px 14px;border-radius:999px;
  background:var(--glass);border:1px solid var(--line);
  color:var(--text);font-size:14px;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search input::placeholder{color:var(--faint);}
.nav-search input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(55,230,208,.18);}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;
  background:var(--glass);border:1px solid var(--line);color:var(--muted);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.icon-btn:hover{color:#fff;border-color:var(--cyan);}
.menu-btn{display:none;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--cyan));
  color:#fff;box-shadow:var(--glow);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(198,255,79,.5),0 16px 40px rgba(47,124,255,.5);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:var(--glass);border-color:var(--line);color:var(--text);}
.btn-ghost:hover{border-color:var(--cyan);color:#fff;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{padding:9px 17px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- 徽章 / 标签 ---------- */
.meta-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;
  background:rgba(47,124,255,.16);
  border:1px solid rgba(55,230,208,.4);
  color:var(--cyan);font-size:12.5px;font-weight:600;letter-spacing:0;
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  background:var(--glass);border:1px solid var(--line);
  font-size:13px;color:var(--muted);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
a.tag:hover{border-color:var(--cyan);color:#fff;background:rgba(55,230,208,.08);}

/* ---------- 文章头部 ---------- */
.article-hero{
  position:relative;
  padding:148px 0 60px;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  overflow:hidden;
}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,11,22,.84),rgba(6,11,22,.94) 62%,var(--bg));
}
.article-hero::after{
  content:"";position:absolute;right:-120px;top:-60px;width:460px;height:460px;border-radius:50%;
  border:1px solid rgba(255,255,255,.08);
  background:radial-gradient(circle,rgba(47,124,255,.16),transparent 68%);
  pointer-events:none;
}
.article-hero .container{position:relative;z-index:2;}

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px;}
.breadcrumb a{color:var(--muted);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb .sep{color:rgba(255,255,255,.28);}
.breadcrumb .current{color:var(--text);}

.article-head{max-width:900px;}
.article-head h1{
  font-size:clamp(26px,3.6vw,42px);
  line-height:1.25;
  margin:16px 0 18px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;
  font-size:13px;color:var(--muted);
}
.article-meta span{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{color:var(--cyan);font-size:12px;}
.article-meta time{font-family:var(--mono);letter-spacing:0;}

/* ---------- 正文 ---------- */
.article-section{padding:56px 0 0;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 296px;gap:40px;align-items:start;}

.article-panel{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-1);
  padding:44px 48px 48px;
}
.article-content{max-width:var(--read);margin:0 auto;font-size:16.5px;line-height:1.9;color:var(--body-text);}
.article-content > *:first-child{margin-top:0;}
.article-content h2{
  position:relative;
  font-size:clamp(21px,2.4vw,27px);
  margin:40px 0 18px;
  padding-left:16px;
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),var(--primary));
}
.article-content h3{font-size:19px;margin:28px 0 12px;}
.article-content h4{font-size:17px;margin:22px 0 10px;color:var(--cyan);}
.article-content p{margin:0 0 1.2em;}
.article-content ul,.article-content ol{padding-left:22px;margin:0 0 1.2em;}
.article-content li{margin-bottom:.55em;}
.article-content strong{color:#fff;}
.article-content a{color:var(--cyan);border-bottom:1px solid rgba(55,230,208,.35);transition:color .2s ease,border-color .2s ease;}
.article-content a:hover{color:#fff;border-color:#fff;}
.article-content blockquote{
  margin:24px 0;padding:16px 20px;
  border-left:3px solid var(--cyan);
  background:var(--glass);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:var(--muted);
}
.article-content img{
  width:100%;height:auto;border-radius:var(--radius);
  margin:24px 0;box-shadow:var(--shadow-1);
}
.article-content figure{margin:24px 0;}
.article-content figcaption{font-size:13px;color:var(--faint);text-align:center;margin-top:10px;}
.article-content table{
  width:100%;border-collapse:collapse;font-size:14px;
  margin:24px 0;border:1px solid var(--line);
  border-radius:14px;overflow:hidden;
}
.article-content th,.article-content td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;}
.article-content th{background:rgba(47,124,255,.14);color:#fff;font-weight:600;}
.article-content tr:last-child td{border-bottom:none;}
.article-content code{
  font-family:var(--mono);font-size:14px;
  background:rgba(255,255,255,.08);padding:2px 6px;border-radius:6px;
}
.article-content hr{border:0;border-top:1px solid var(--line);margin:36px 0;}

/* ---------- 空态 ---------- */
.empty-state{
  max-width:var(--read);margin:0 auto;text-align:center;
  padding:56px 20px 64px;
}
.empty-state .mark{
  width:64px;height:64px;margin:0 auto 22px;border-radius:20px;
  display:flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);
  color:var(--cyan);font-size:24px;
}
.empty-state h2{font-size:22px;margin-bottom:12px;}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:26px;}

/* ---------- 侧栏 ---------- */
.article-side{position:sticky;top:88px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  padding:22px;box-shadow:var(--shadow-1);
}
.side-card h3{font-size:15px;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h3 i{color:var(--cyan);font-size:13px;}
.side-card ul{list-style:none;display:flex;flex-direction:column;gap:12px;}
.side-card li a{
  display:block;font-size:14px;color:var(--muted);line-height:1.6;
  transition:color .2s ease,transform .2s ease;
}
.side-card li a:hover{color:var(--cyan);transform:translateX(2px);}
.side-card .side-line{height:1px;background:var(--line);margin:16px 0;}
.side-card .side-note{font-size:12.5px;color:var(--faint);line-height:1.7;}

/* ---------- 文章尾部 ---------- */
.article-footer{padding:40px 0 0;}
.article-footer .inner{max-width:var(--read);margin:0 auto;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px;}
.author-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
}
.author-bar .who{display:flex;align-items:center;gap:12px;}
.author-bar .avatar{
  width:38px;height:38px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--primary),var(--cyan));
  display:flex;align-items:center;justify-content:center;color:#06121f;font-weight:700;font-size:14px;
}
.author-bar .who strong{display:block;font-size:14.5px;color:#fff;}
.author-bar .who span{display:block;font-size:12.5px;color:var(--muted);}
.author-bar .actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 板块标题 ---------- */
.section-head{max-width:720px;margin-bottom:32px;}
.section-head .eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:.08em;
  color:var(--cyan);margin-bottom:10px;text-transform:uppercase;
}
.section-head h2{font-size:clamp(22px,2.6vw,31px);margin-bottom:12px;}
.section-head p{color:var(--muted);font-size:15px;}

/* ---------- 相关推荐 ---------- */
.related{padding:72px 0 0;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.post-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.post-card:hover{transform:translateY(-4px);border-color:rgba(55,230,208,.5);box-shadow:var(--shadow-2);}
.post-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2);}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .3s ease;}
.post-card:hover .thumb img{transform:scale(1.04);}
.post-card .thumb .badge{
  position:absolute;top:12px;left:12px;
  padding:4px 10px;border-radius:999px;
  background:rgba(6,11,22,.78);border:1px solid rgba(55,230,208,.45);
  color:var(--cyan);font-size:12px;backdrop-filter:blur(8px);
}
.post-card .body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-card .date{font-family:var(--mono);font-size:12.5px;color:var(--faint);letter-spacing:0;}
.post-card h3{font-size:17px;line-height:1.45;}
.post-card p{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-card .more{margin-top:auto;color:var(--cyan);font-size:14px;display:inline-flex;align-items:center;gap:6px;}
.post-card .more i{transition:transform .2s ease;}
.post-card:hover .more i{transform:translateX(4px);}
.related-empty{
  padding:28px 24px;border-radius:var(--radius);
  background:var(--glass);border:1px dashed var(--line);
  color:var(--muted);font-size:14.5px;
}

/* ---------- FAQ ---------- */
.faq{padding:80px 0 0;}
.faq-wrap{max-width:900px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;font-size:17px;font-weight:600;color:#fff;
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--cyan);}
.faq-item summary .icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);
  color:var(--cyan);font-size:12px;
  transition:transform .2s ease,background .2s ease;
}
.faq-item[open] summary .icon{transform:rotate(45deg);background:rgba(55,230,208,.14);}
.faq-item .answer{padding:0 4px 22px;font-size:15px;line-height:1.8;color:var(--muted);}

/* ---------- CTA ---------- */
.cta-section{padding:88px 0 0;}
.cta-banner{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:34px;
  padding:54px 48px;border-radius:var(--radius-lg);
  border:1px solid rgba(55,230,208,.35);
  background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  box-shadow:0 0 0 1px rgba(47,124,255,.2),0 24px 60px rgba(0,0,0,.45);
}
.cta-banner::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(6,11,22,.95),rgba(6,11,22,.72));
}
.cta-banner > *{position:relative;z-index:2;}
.cta-banner h2{font-size:clamp(21px,2.4vw,29px);margin-bottom:10px;}
.cta-banner p{color:var(--muted);font-size:15px;max-width:560px;}
.cta-banner .cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex:0 0 auto;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;padding-top:64px;
  background:var(--bg-2);border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.7fr;gap:34px;}
.fb-logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-brand p{font-size:13.5px;color:var(--muted);line-height:1.8;max-width:320px;}
.footer-col h4{font-size:15px;margin-bottom:16px;}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:11px;}
.footer-col a{
  display:inline-block;font-size:14px;color:var(--muted);
  transition:color .2s ease,transform .2s ease;
}
.footer-col a:hover{color:#fff;transform:translateX(-2px);}
.footer-note strong{display:block;font-size:15px;color:#fff;margin-bottom:12px;}
.footer-note p{font-size:12px;color:var(--faint);line-height:1.75;}
.footer-bottom{
  margin-top:48px;padding:20px 0 30px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-size:12.5px;color:var(--faint);
}
.fb-links{display:flex;flex-wrap:wrap;gap:18px;}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:1fr;gap:0;}
  .article-side{display:none;}
  .article-panel{padding:36px 34px 40px;}
}
@media (max-width:1023px){
  .menu-btn{display:inline-flex;}
  .nav-links{
    position:fixed;inset:0;z-index:70;margin:0;
    flex-direction:column;justify-content:center;gap:6px;
    padding:88px 24px 110px;
    background:rgba(6,11,22,.96);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    backdrop-filter:blur(18px) saturate(140%);
    transform:translateY(-100%);opacity:0;pointer-events:none;
    transition:transform .24s ease,opacity .24s ease;
    overflow-y:auto;
  }
  .nav-links.open{transform:translateY(0);opacity:1;pointer-events:auto;}
  .nav-links a{
    width:100%;height:48px;justify-content:center;
    font-size:17px;color:var(--text);
  }
  .nav-links a:hover,.nav-links a.active{background:var(--glass);}
  .nav-search{
    position:absolute;top:100%;left:0;right:0;display:none;
    padding:14px 24px;
    background:rgba(6,11,22,.96);
    border-bottom:1px solid var(--line);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
  }
  .nav-search.open{display:block;}
  .nav-search input{width:100%;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
  .cta-banner{flex-direction:column;align-items:flex-start;padding:38px 30px;}
  .article-hero{padding:126px 0 52px;}
}
@media (max-width:640px){
  .container{padding:0 18px;}
  .site-header{height:60px;}
  .brand{font-size:17px;}
  .brand .dot,.fb-logo .dot{width:9px;height:9px;}
  .article-hero{padding:112px 0 44px;}
  .article-hero::after{display:none;}
  .article-panel{padding:26px 20px 30px;border-radius:var(--radius);}
  .article-content{font-size:16px;}
  .card-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-banner{padding:30px 22px;border-radius:var(--radius);}
  .cta-banner .cta-actions{width:100%;}
  .cta-banner .cta-actions .btn{width:100%;}
  .section-head{margin-bottom:24px;}
  .related{padding:56px 0 0;}
  .faq{padding:60px 0 0;}
  .cta-section{padding:64px 0 0;}
  .site-footer{margin-top:72px;padding-top:48px;}
  .author-bar{flex-direction:column;align-items:flex-start;}
  .author-bar .actions{width:100%;}
  .author-bar .actions .btn{width:100%;}
}
@media (max-width:520px){
  .article-head h1{font-size:24px;}
  .article-meta{font-size:12.5px;gap:8px 14px;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
}
@supports not ((backdrop-filter:blur(4px)) or (-webkit-backdrop-filter:blur(4px))){
  .site-header{background:rgba(6,11,22,.94);}
  .article-panel,.post-card,.side-card,.author-bar{background:var(--glass-strong);}
}

/* roulang page: category1 */
:root{
  --bg:#060B16;
  --bg-2:#0A1122;
  --primary:#2F7CFF;
  --cyan:#37E6D0;
  --lime:#C6FF4F;
  --text:#E8EEF9;
  --muted:#9AA9C2;
  --dim:#7C8AA5;
  --line:rgba(255,255,255,.12);
  --line-soft:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.06);
  --radius-card:16px;
  --radius-lg:20px;
  --radius-btn:999px;
  --shadow-1:0 10px 30px rgba(0,0,0,.35);
  --shadow-2:0 18px 45px rgba(47,124,255,.28);
  --glow:0 0 0 1px rgba(55,230,208,.45),0 12px 34px rgba(47,124,255,.45);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --mono:ui-monospace,"Roboto Mono",Menlo,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:16.5px;
  line-height:1.85;
  letter-spacing:-0.01em;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(900px 520px at 88% -8%,rgba(47,124,255,.18),transparent 70%),
    radial-gradient(700px 460px at -5% 22%,rgba(55,230,208,.10),transparent 70%);
  background-attachment:fixed;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-0.01em;line-height:1.3}
p{margin:0}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
::selection{background:rgba(55,230,208,.28)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- Header / Nav ---------- */
.site-header{
  position:absolute;top:0;left:0;right:0;z-index:60;
  background:rgba(255,255,255,.04);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background .22s ease,box-shadow .22s ease,border-color .22s ease,height .22s ease;
}
.site-header.is-scrolled{
  position:fixed;
  background:rgba(6,11,22,.95);
  box-shadow:0 10px 30px rgba(0,0,0,.5);
  border-bottom-color:var(--line-soft);
}
.nav-inner{display:flex;align-items:center;gap:16px;height:72px;position:relative}
.brand{display:inline-flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:#fff;white-space:nowrap}
.brand .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(120deg,var(--primary),var(--cyan));box-shadow:0 0 12px rgba(55,230,208,.85)}
.nav-links{display:flex;align-items:center;gap:4px;margin:0 auto}
.nav-links a{
  position:relative;padding:10px 13px;border-radius:10px;font-size:15px;color:var(--muted);
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.05)}
.nav-links a.active{color:#fff}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;bottom:2px;width:60%;height:2px;border-radius:2px;
  transform:translateX(-50%);background:var(--cyan);box-shadow:0 0 10px rgba(55,230,208,.85);
}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-search input{
  width:188px;padding:9px 15px;border-radius:var(--radius-btn);
  background:rgba(255,255,255,.06);border:1px solid var(--line);color:var(--text);font-size:14px;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.nav-search input::placeholder{color:var(--dim)}
.nav-search input:focus{
  outline:none;background:rgba(255,255,255,.09);
  border-color:rgba(55,230,208,.7);box-shadow:0 0 0 3px rgba(55,230,208,.15);
}
.icon-btn{
  width:38px;height:38px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);color:var(--muted);cursor:pointer;
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.icon-btn:hover{color:#fff;border-color:rgba(55,230,208,.55);transform:translateY(-1px)}
#searchToggle{display:none}
.menu-btn{display:none}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease,border-color .2s ease,background .2s ease,color .2s ease;
}
.btn-primary{background:linear-gradient(100deg,var(--primary),var(--cyan));color:#fff;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(198,255,79,.6),0 16px 40px rgba(47,124,255,.5)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:var(--glass);border-color:var(--line);color:var(--text);backdrop-filter:blur(14px)}
.btn-ghost:hover{border-color:rgba(55,230,208,.6);color:#fff;transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:9px 18px;font-size:14px}

/* ---------- Page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;isolation:isolate;
  display:flex;align-items:flex-end;min-height:44vh;
  padding:150px 0 68px;
}
.page-hero-bg{position:absolute;inset:0;z-index:-2;background-size:cover;background-position:center}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    linear-gradient(180deg,rgba(6,11,22,.72) 0%,rgba(6,11,22,.9) 58%,#060B16 100%),
    radial-gradient(620px 320px at 84% 8%,rgba(47,124,255,.3),transparent 70%);
}
.hero-ring{
  position:absolute;right:-70px;bottom:-90px;width:340px;height:340px;border-radius:50%;
  border:1px solid rgba(255,255,255,.07);z-index:-1;
}
.hero-ring.two{width:520px;height:520px;right:-160px;bottom:-200px;border-color:rgba(255,255,255,.05)}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--dim);margin-bottom:20px}
.breadcrumb a{transition:color .2s ease}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{opacity:.6}
.breadcrumb .current{color:var(--muted)}
.pill{
  display:inline-flex;align-items:center;gap:7px;padding:5px 15px;border-radius:999px;
  background:var(--glass);border:1px solid var(--line);color:var(--cyan);
  font-size:12.5px;letter-spacing:.02em;backdrop-filter:blur(10px);margin-bottom:18px;
}
.page-hero h1{font-size:clamp(26px,4vw,42px);line-height:1.22;max-width:820px}
.page-hero .lead{margin-top:18px;max-width:680px;color:var(--muted);font-size:17px}

/* ---------- Sections ---------- */
.section{padding:88px 0}
.section-alt{background:linear-gradient(180deg,rgba(10,17,34,.0),rgba(10,17,34,.9) 12%,rgba(10,17,34,.9) 88%,rgba(10,17,34,0));}
.section-head{max-width:760px;margin-bottom:38px}
.section-head .eyebrow{display:block;font-size:13px;color:var(--cyan);letter-spacing:.1em;margin-bottom:10px}
.section-head h2{font-size:clamp(22px,2.6vw,32px);line-height:1.3}
.section-head p{margin-top:14px;color:var(--muted)}

/* ---------- Split ---------- */
.split{display:grid;grid-template-columns:0.92fr 1.08fr;gap:56px;align-items:start}
.split-media{position:relative}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-card);box-shadow:var(--shadow-1)}
.split-media figcaption{
  margin-top:14px;font-size:13px;color:var(--dim);
}
.step-list{display:grid;gap:16px;margin-top:26px}
.step-list li{
  display:flex;gap:16px;padding:18px 22px;border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--glass);backdrop-filter:blur(14px) saturate(140%);
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.step-list li:hover{border-color:rgba(55,230,208,.45);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.step-no{font-family:var(--mono);font-size:19px;font-weight:700;color:var(--cyan);min-width:42px;line-height:1.6}
.step-list h3{font-size:16.5px;margin-bottom:6px}
.step-list p{color:var(--muted);font-size:14.5px;line-height:1.75}

/* ---------- Env panel ---------- */
.env-panel{
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  background:rgba(10,17,34,.72);box-shadow:var(--shadow-1);
}
.env-row{
  display:grid;grid-template-columns:230px 1fr;gap:22px;padding:22px 28px;
  border-top:1px solid var(--line-soft);
  transition:background .2s ease;
}
.env-row:first-child{border-top:0}
.env-row:hover{background:rgba(55,230,208,.06)}
.env-key{font-weight:600;color:#fff;font-size:15px}
.env-val{color:var(--muted);font-size:14.5px}
.env-foot{padding:16px 28px;border-top:1px solid var(--line-soft);font-size:13px;color:var(--dim);background:rgba(255,255,255,.03)}

/* ---------- Note cards ---------- */
.note-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.note-card{
  padding:26px 24px 28px;border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--glass);backdrop-filter:blur(14px) saturate(140%);
  position:relative;overflow:hidden;
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.note-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);
}
.note-card:hover{border-color:rgba(55,230,208,.45);transform:translateY(-4px);box-shadow:var(--shadow-2)}
.note-card .num{font-family:var(--mono);font-size:44px;line-height:1;color:rgba(55,230,208,.22);font-weight:700;letter-spacing:-0.02em}
.note-card h3{font-size:17.5px;margin:14px 0 10px}
.note-card p{color:var(--muted);font-size:14.5px;line-height:1.78}

/* ---------- Cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  background:var(--glass);backdrop-filter:blur(14px) saturate(140%);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(55,230,208,.45);box-shadow:var(--shadow-2)}
.card .thumb{overflow:hidden}
.card img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
.card:hover img{transform:scale(1.03)}
.card-body{padding:20px 22px 24px}
.card-body h3{font-size:18px;margin-bottom:10px}
.card-body p{color:var(--muted);font-size:14.5px;line-height:1.75}
.card-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:14px;color:var(--cyan)}
.card-link i{transition:transform .2s ease}
.card:hover .card-link i{transform:translateX(4px)}

/* ---------- FAQ ---------- */
.faq{
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  background:rgba(10,17,34,.62);box-shadow:var(--shadow-1);
}
.faq-item{border-top:1px solid var(--line-soft)}
.faq-item:first-child{border-top:0}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 26px;text-align:left;font-size:16px;font-weight:600;color:var(--text);cursor:pointer;
  transition:color .2s ease,background .2s ease;
}
.faq-q:hover{color:#fff;background:rgba(255,255,255,.03)}
.faq-q i{color:var(--cyan);font-size:14px;transition:transform .2s ease}
.faq-item.open .faq-q i{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-item.open .faq-a{max-height:420px}
.faq-a p{padding:0 26px 22px 34px;font-size:15px;line-height:1.8;color:var(--muted)}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;isolation:isolate;
  border:1px solid rgba(55,230,208,.35);border-radius:24px;
  padding:46px 48px;display:flex;align-items:center;justify-content:space-between;gap:32px;
  background:linear-gradient(120deg,rgba(47,124,255,.18),rgba(55,230,208,.10)),var(--bg-2);
  box-shadow:var(--glow);
}
.cta-band::before{
  content:"";position:absolute;inset:0;z-index:-1;background-size:cover;background-position:center;
  opacity:.22;mix-blend-mode:luminosity;
}
.cta-band h2{font-size:clamp(20px,2.3vw,28px)}
.cta-band p{margin-top:12px;color:var(--muted);max-width:620px;font-size:15px}
.cta-actions{display:flex;gap:14px;flex-shrink:0;flex-wrap:wrap}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);background:rgba(6,11,22,.92);padding:64px 0 28px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr 1.3fr;gap:36px}
.fb-logo{display:inline-flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:#fff}
.fb-logo .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(120deg,var(--primary),var(--cyan));box-shadow:0 0 12px rgba(55,230,208,.85)}
.footer-brand p{margin-top:16px;color:var(--muted);font-size:14px;line-height:1.78;max-width:340px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:#fff}
.footer-col ul{display:grid;gap:10px}
.footer-col a{color:var(--muted);font-size:14px;display:inline-block;transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-note strong{display:block;font-size:15px;color:#fff;margin-bottom:12px}
.footer-note p{color:var(--dim);font-size:12px;line-height:1.8}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line-soft);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12px;color:var(--dim);
}
.fb-links{display:flex;gap:20px;flex-wrap:wrap}

/* ---------- Mobile panel ---------- */
.mobile-panel{display:none}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 20px}
  .nav-links{display:none}
  #searchToggle{display:inline-flex}
  .nav-search{position:absolute;top:66px;left:20px;right:20px;display:none}
  .nav-search.open{display:block}
  .nav-search input{width:100%}
  .menu-btn{display:inline-flex}
  .section{padding:64px 0}
  .split{grid-template-columns:1fr;gap:36px}
  .note-grid{grid-template-columns:1fr 1fr}
  .card-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:38px 34px}
  .env-row{grid-template-columns:180px 1fr}

  .mobile-panel{
    position:fixed;inset:0;z-index:100;

    flex-direction:column;gap:6px;
    padding:88px 24px 120px;
    background:rgba(6,11,22,.96);
    backdrop-filter:blur(18px) saturate(140%);
    opacity:0;transform:translateY(-10px);pointer-events:none;
    transition:opacity .22s ease,transform .22s ease;
  }
  .mobile-panel.open{opacity:1;transform:none;pointer-events:auto}
  .mobile-panel a{display:flex;align-items:center;height:48px;padding:0 16px;border-radius:12px;color:var(--muted);font-size:16px;transition:color .2s ease,background .2s ease}
  .mobile-panel a:hover{color:#fff;background:rgba(255,255,255,.05)}
  .mobile-panel a.active{color:#fff;background:rgba(55,230,208,.1)}
  .mobile-panel .btn{margin-top:18px;height:auto;justify-content:center}
  .panel-close{position:absolute;top:16px;right:20px}
}
@media (max-width:768px){
  body{font-size:16px}
  .nav-actions .btn-primary{display:none}
  .page-hero{padding:132px 0 54px;min-height:38vh}
  .page-hero .lead{font-size:15.5px}
  .section{padding:52px 0}
  .note-grid,.card-grid{grid-template-columns:1fr}
  .env-row{grid-template-columns:1fr;gap:8px;padding:20px 22px}
  .env-key{font-size:15px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;gap:8px}
  .cta-band{padding:32px 24px}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .faq-q{padding:18px 20px;font-size:15.5px}
  .faq-a p{padding:0 20px 20px 28px}
  .step-list li{padding:16px 18px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .brand{font-size:15.5px}
  .nav-inner{height:60px;gap:10px}
  .split-media img{aspect-ratio:16/10}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --blue:#2F7CFF;
  --cyan:#37E6D0;
  --lime:#C6FF4F;
  --bg:#060B16;
  --bg-2:#0A1122;
  --text:#E8EEF9;
  --muted:#9AA9C2;
  --faint:#7C8AA5;
  --line:rgba(255,255,255,.12);
  --glass:rgba(255,255,255,.06);
  --r-card:16px;
  --r-btn:12px;
  --r-pill:999px;
  --shadow-1:0 10px 30px rgba(0,0,0,.35);
  --shadow-2:0 18px 45px rgba(47,124,255,.28);
  --glow:0 0 0 1px rgba(55,230,208,.45), 0 12px 34px rgba(47,124,255,.45);
  --ease:cubic-bezier(.4,0,.2,1);
  --mono:ui-monospace,SFMono-Regular,"Roboto Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:-.01em;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(680px 420px at 88% -6%,rgba(55,230,208,.14),transparent 62%),
    radial-gradient(760px 520px at 4% 12%,rgba(47,124,255,.16),transparent 66%);
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:-.01em;}
p{margin:0;}
button{font:inherit;}
::selection{background:rgba(55,230,208,.28);}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  background:rgba(255,255,255,.04);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:background .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  .site-header{background:rgba(10,17,34,.92);}
}
.site-header.scrolled{
  background:rgba(6,11,22,.95);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  backdrop-filter:blur(18px) saturate(150%);
  border-bottom-color:rgba(255,255,255,.1);
  box-shadow:0 14px 34px rgba(0,0,0,.5);
}
.nav-inner{display:flex;align-items:center;gap:22px;height:72px;transition:height .22s var(--ease);}
.site-header.scrolled .nav-inner{height:60px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:700;color:#fff;white-space:nowrap;}
.brand .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:0 0 14px rgba(55,230,208,.85);flex:none;}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-links a{position:relative;font-size:15px;color:var(--muted);padding:6px 0;transition:color .18s var(--ease);}
.nav-links a::after{
  content:"";position:absolute;left:20%;right:20%;bottom:0;height:2px;border-radius:2px;
  background:var(--cyan);opacity:0;transition:opacity .18s var(--ease);
}
.nav-links a:hover{color:#fff;}
.nav-links a:hover::after{opacity:.85;}
.nav-links a.active{color:#8FB9FF;}
.nav-links a.active::after{opacity:1;background:var(--blue);box-shadow:0 0 10px rgba(47,124,255,.9);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-search input{
  width:172px;height:38px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.06);border:1px solid var(--line);
  color:var(--text);padding:0 16px;font-size:14px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-search input::placeholder{color:var(--faint);}
.nav-search input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(55,230,208,.18);}
.icon-btn{
  width:38px;height:38px;border-radius:12px;display:none;place-items:center;
  background:var(--glass);border:1px solid var(--line);color:var(--text);cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.icon-btn:hover{border-color:var(--cyan);color:#fff;}
.menu-btn{display:none;}
.mobile-panel{
  position:fixed;inset:60px 0 0 0;z-index:79;
  background:rgba(6,11,22,.96);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  padding:20px 24px 32px;
  display:flex;flex-direction:column;gap:6px;
  opacity:0;transform:translateY(-10px);pointer-events:none;
  transition:opacity .2s var(--ease),transform .2s var(--ease);
}
.mobile-panel.open{opacity:1;transform:none;pointer-events:auto;}
.mobile-panel a{display:flex;align-items:center;height:48px;padding:0 14px;border-radius:12px;color:var(--muted);font-size:16px;border:1px solid transparent;}
.mobile-panel a:hover{color:#fff;background:var(--glass);}
.mobile-panel a.active{color:#8FB9FF;border-color:rgba(47,124,255,.4);background:rgba(47,124,255,.12);}
.mobile-panel .btn{margin-top:14px;width:100%;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),filter .2s var(--ease),color .2s var(--ease);
}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;box-shadow:var(--glow);}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(198,255,79,.6),0 16px 40px rgba(47,124,255,.5);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:var(--glass);border-color:var(--line);color:var(--text);}
.btn-ghost:hover{border-color:var(--cyan);color:#fff;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px;}
.btn-block{width:100%;}

/* ---------- 通用板块 ---------- */
.section{padding:92px 0;position:relative;}
.section-alt{background:linear-gradient(180deg,rgba(10,17,34,.0),rgba(10,17,34,.72) 22%,rgba(10,17,34,.72) 78%,rgba(10,17,34,0));}
.section-head{max-width:760px;margin-bottom:38px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--cyan);letter-spacing:.04em;
  padding:5px 14px;border-radius:var(--r-pill);
  background:rgba(55,230,208,.1);border:1px solid rgba(55,230,208,.28);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan);}
.sec-title{font-size:clamp(22px,2.6vw,32px);margin:18px 0 0;}
.sec-desc{margin-top:16px;color:var(--muted);font-size:16px;max-width:720px;}
.glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
  position:relative;
  overflow:hidden;
}
.glass::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.4),transparent);
}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  .glass{background:rgba(10,17,34,.92);}
}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* ---------- Hero ---------- */
.hero-cat{
  position:relative;
  padding:150px 0 66px;
  background:linear-gradient(180deg,rgba(6,11,22,.72),rgba(6,11,22,.93)),url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  overflow:hidden;
}
.hero-cat::after{
  content:"";position:absolute;right:-140px;top:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(55,230,208,.22),transparent 66%);
  pointer-events:none;
}
.hero-cat::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.07;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:64px 64px;
}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin-bottom:22px;position:relative;z-index:2;}
.breadcrumb a{color:var(--muted);transition:color .18s var(--ease);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb i{font-size:9px;color:var(--faint);}
.breadcrumb .current{color:var(--text);}
.hero-cat h1{font-size:clamp(28px,4.2vw,44px);line-height:1.2;max-width:760px;position:relative;z-index:2;}
.hero-cat h1 em{font-style:normal;background:linear-gradient(120deg,var(--cyan),#8FD8FF);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-lead{margin-top:20px;max-width:720px;color:var(--muted);font-size:17px;position:relative;z-index:2;}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap;position:relative;z-index:2;}

/* ---------- 数据条 ---------- */
.stats-strip{padding:0 0 6px;transform:translateY(-34px);position:relative;z-index:3;}
.stats-row{margin:0;}
.stat{
  padding:22px 20px;border-radius:var(--r-card);
  background:rgba(10,17,34,.86);
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  height:100%;
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.stat:hover{border-color:rgba(55,230,208,.42);transform:translateY(-3px);}
.stat .num{font-family:var(--mono);font-size:30px;font-weight:700;color:#fff;line-height:1;}
.stat .num span{font-size:14px;color:var(--cyan);margin-left:4px;font-weight:600;}
.stat .lab{margin-top:10px;font-size:13.5px;color:var(--muted);}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;margin-top:26px;}
.timeline::before{
  content:"";position:absolute;top:0;bottom:0;left:50%;width:2px;transform:translateX(-50%);
  background:linear-gradient(180deg,rgba(55,230,208,0),rgba(55,230,208,.55) 12%,rgba(47,124,255,.5) 72%,rgba(55,230,208,0));
}
.tl-item{display:grid;grid-template-columns:1fr 96px 1fr;align-items:center;margin-bottom:44px;}
.tl-item:last-child{margin-bottom:0;}
.tl-card{grid-column:1;grid-row:1;padding:0;overflow:hidden;transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);}
.tl-item--right .tl-card{grid-column:3;}
.tl-card:hover{border-color:rgba(55,230,208,.42);transform:translateY(-3px);box-shadow:var(--shadow-2);}
.tl-media{aspect-ratio:16/9;overflow:hidden;background:rgba(255,255,255,.04);}
.tl-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.tl-card:hover .tl-media img{transform:scale(1.03);}
.tl-body{padding:24px 26px 26px;}
.tl-body h3{font-size:20px;margin:14px 0 10px;}
.tl-body p{color:var(--muted);font-size:15.5px;}
.tl-list{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.tl-list li{position:relative;padding-left:20px;font-size:14.5px;color:#C7D3E6;}
.tl-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;
  border:1.5px solid var(--cyan);background:rgba(55,230,208,.16);
}
.tl-spine{grid-column:2;grid-row:1;display:flex;justify-content:center;position:relative;z-index:2;}
.tl-dot{
  width:16px;height:16px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 0 5px rgba(55,230,208,.14),0 0 20px rgba(55,230,208,.8);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;
  background:var(--glass);border:1px solid var(--line);color:#CFE0F5;
}
.badge-lv{border-color:rgba(55,230,208,.45);color:var(--cyan);background:rgba(55,230,208,.1);}
.badge-lime{border-color:rgba(198,255,79,.5);color:var(--lime);background:rgba(198,255,79,.1);}

/* ---------- 图文块 ---------- */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center;}
.split-media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-1);}
.split-media img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.split figcaption{margin-top:12px;font-size:13px;color:var(--faint);}
.split h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:18px;}
.split p{color:var(--muted);}
.mini-list{margin-top:24px;display:flex;flex-direction:column;gap:16px;}
.mini-list li{display:flex;gap:14px;align-items:flex-start;}
.mini-list .mi{
  flex:none;width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:rgba(47,124,255,.14);border:1px solid rgba(47,124,255,.35);color:var(--cyan);font-size:15px;
}
.mini-list strong{display:block;font-size:15.5px;margin-bottom:2px;}
.mini-list span{color:var(--muted);font-size:14.5px;display:block;}

/* ---------- 权益分组 ---------- */
.group-stack{display:flex;flex-direction:column;gap:22px;}
.group{padding:26px 28px 22px;}
.group-head{display:flex;gap:18px;align-items:flex-start;padding-bottom:18px;border-bottom:1px solid var(--line);}
.group-num{font-family:var(--mono);font-size:26px;font-weight:700;color:rgba(55,230,208,.85);line-height:1;flex:none;padding-top:4px;}
.group-head h3{font-size:19px;}
.group-head p{color:var(--muted);font-size:14.5px;margin-top:6px;}
.row-list{margin-top:6px;}
.row-item{
  display:flex;align-items:center;gap:18px;justify-content:space-between;
  padding:16px 4px;border-bottom:1px solid var(--line);
  transition:background .18s var(--ease),padding-left .18s var(--ease);
}
.row-item:last-child{border-bottom:0;}
.row-item:hover{background:rgba(255,255,255,.035);padding-left:10px;}
.row-name{font-size:15.5px;}
.row-name small{display:block;color:var(--faint);font-size:13px;margin-top:2px;}
.row-tags{display:flex;gap:8px;flex:none;flex-wrap:wrap;justify-content:flex-end;}
.tag{
  font-size:12.5px;padding:4px 11px;border-radius:var(--r-pill);
  border:1px solid var(--line);color:var(--muted);background:rgba(255,255,255,.04);white-space:nowrap;
}
.tag-on{border-color:rgba(55,230,208,.42);color:var(--cyan);background:rgba(55,230,208,.09);}
.tag-top{border-color:rgba(198,255,79,.45);color:var(--lime);background:rgba(198,255,79,.08);}
.note-line{margin-top:18px;font-size:13px;color:var(--faint);}

/* ---------- 场景 ---------- */
.scene-list{display:flex;flex-direction:column;gap:0;border-top:1px solid var(--line);}
.scene-item{
  display:grid;grid-template-columns:120px 1fr 200px;gap:26px;align-items:center;
  padding:28px 6px;border-bottom:1px solid var(--line);
  transition:background .2s var(--ease),padding-left .2s var(--ease);
}
.scene-item:hover{background:rgba(255,255,255,.035);padding-left:16px;}
.scene-num{font-family:var(--mono);font-size:40px;font-weight:700;color:rgba(255,255,255,.14);line-height:1;}
.scene-item h3{font-size:18px;margin-bottom:6px;}
.scene-item p{color:var(--muted);font-size:15px;}
.scene-meta{text-align:right;font-size:13.5px;color:var(--muted);}
.scene-meta strong{display:block;font-family:var(--mono);color:var(--cyan);font-size:15px;margin-bottom:4px;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;border-radius:20px;overflow:hidden;
  background:linear-gradient(120deg,rgba(6,11,22,.9),rgba(6,11,22,.7)),url("/assets/images/backpic/back-3.webp") center/cover no-repeat;
  border:1px solid rgba(55,230,208,.32);
  box-shadow:var(--shadow-1);
}
.cta-band .glow-edge{position:absolute;inset:-1px;border-radius:20px;pointer-events:none;box-shadow:inset 0 0 40px rgba(47,124,255,.28);}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;padding:40px 40px;position:relative;z-index:2;}
.cta-inner h2{font-size:clamp(21px,2.4vw,28px);}
.cta-inner p{color:var(--muted);margin-top:10px;font-size:15.5px;max-width:560px;}
.cta-actions{display:flex;gap:12px;flex:none;}

/* ---------- FAQ ---------- */
.faq{max-width:860px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:22px;
  padding:22px 4px;background:none;border:0;color:var(--text);
  font-size:17px;font-weight:600;text-align:left;cursor:pointer;
}
.faq-q i{color:var(--cyan);font-size:14px;flex:none;transition:transform .22s var(--ease);}
.faq-item.open .faq-q i{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s var(--ease);}
.faq-item.open .faq-a{max-height:460px;}
.faq-a p{padding:0 0 24px 8px;color:var(--muted);font-size:15px;line-height:1.8;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,17,34,.5),rgba(6,11,22,1));
  padding-top:64px;position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.6fr;gap:40px;}
.fb-logo{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff;}
.fb-logo .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:0 0 14px rgba(55,230,208,.85);}
.footer-brand p{margin-top:16px;color:var(--muted);font-size:14.5px;max-width:340px;}
.footer-col h4{font-size:15px;margin-bottom:18px;color:#fff;}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a{color:var(--muted);font-size:14.5px;transition:color .18s var(--ease),transform .18s var(--ease);display:inline-block;}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-note strong{display:block;font-size:15px;margin-bottom:14px;color:#fff;}
.footer-note p{color:var(--faint);font-size:12.5px;line-height:1.9;}
.footer-bottom{
  margin-top:52px;padding:22px 0 30px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:12.5px;color:var(--faint);
}
.fb-links{display:flex;gap:18px;flex-wrap:wrap;}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-links{display:none;}
  .nav-search{display:none;}
  .nav-search.open{
    display:block;position:absolute;left:0;right:0;top:100%;
    padding:12px 24px;background:rgba(6,11,22,.97);border-bottom:1px solid var(--line);
  }
  .nav-search.open input{width:100%;}
  .menu-btn{display:grid;}
  .icon-btn{display:grid;}
  .section{padding:66px 0;}
  .split{grid-template-columns:1fr;gap:28px;}
  .scene-item{grid-template-columns:80px 1fr;gap:18px;}
  .scene-meta{grid-column:2;text-align:left;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .hero-cat{padding:126px 0 54px;}
  .stats-strip{transform:translateY(-24px);}
  .tl-item{grid-template-columns:34px 1fr;margin-bottom:32px;}
  .timeline::before{left:16px;transform:none;}
  .tl-spine{grid-column:1;justify-content:flex-start;}
  .tl-item .tl-card{grid-column:2;}
  .tl-item--right .tl-card{grid-column:2;}
  .tl-body{padding:20px;}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:30px 24px;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .group{padding:22px 20px 18px;}
  .row-item{flex-direction:column;align-items:flex-start;gap:10px;}
  .row-tags{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .brand{font-size:16px;}
  .nav-inner{gap:10px;height:60px;}
  .hero-cat h1{font-size:26px;}
  .hero-lead{font-size:15.5px;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .stat .num{font-size:26px;}
  .scene-item{grid-template-columns:1fr;}
  .scene-num{font-size:32px;}
  .footer-bottom{flex-direction:column;gap:10px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important;}
}

/* roulang page: category3 */
:root{
  --bg:#060B16;
  --bg-2:#0A1122;
  --primary:#2F7CFF;
  --cyan:#37E6D0;
  --lime:#C6FF4F;
  --text:#E8EEF9;
  --muted:#9AA9C2;
  --muted-2:#7C8AA5;
  --line:rgba(255,255,255,.12);
  --line-soft:rgba(255,255,255,.07);
  --glass:rgba(255,255,255,.06);
  --glass-2:rgba(255,255,255,.035);
  --r-card:16px;
  --r-lg:20px;
  --r-sm:12px;
  --sh-1:0 10px 30px rgba(0,0,0,.35);
  --sh-2:0 18px 45px rgba(47,124,255,.28);
  --sh-glow:0 0 0 1px rgba(55,230,208,.45),0 12px 34px rgba(47,124,255,.45);
  --max:1200px;
  --mono:ui-monospace,SFMono-Regular,"Roboto Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;color:#fff}
h1{font-size:clamp(28px,4.2vw,44px);line-height:1.2}
h2{font-size:clamp(22px,2.6vw,32px);line-height:1.3}
h3{font-size:20px;line-height:1.4}
p{margin:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input{font:inherit;color:inherit}
ul{margin:0;padding:0;list-style:none}
::selection{background:rgba(55,230,208,.3)}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
.section{padding:92px 0;position:relative}
.section.tight{padding:72px 0}
.section-head{max-width:780px;margin-bottom:36px}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.1em;color:var(--cyan);margin-bottom:14px}
.section-head h2{margin-bottom:14px}
.section-lead{color:var(--muted);font-size:16px;line-height:1.85}
.divider{height:1px;background:var(--line-soft);border:0;margin:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-sm);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(120deg,var(--primary),var(--cyan));
  color:#04121B;
  box-shadow:0 12px 30px rgba(47,124,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:var(--sh-glow)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:var(--glass);border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--cyan);transform:translateY(-2px);box-shadow:0 12px 30px rgba(55,230,208,.18)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-block{width:100%}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12px;
  background:var(--glass);border:1px solid var(--line);color:var(--muted);
}
.badge-glow{border-color:rgba(55,230,208,.5);color:var(--cyan);box-shadow:0 0 18px rgba(55,230,208,.18)}
.badge-lime{border-color:rgba(198,255,79,.45);color:var(--lime)}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;height:72px;
  display:flex;align-items:center;
  background:rgba(6,11,22,.35);
  border-bottom:1px solid var(--line-soft);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  transition:height .22s ease,background .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.site-header.scrolled{
  height:60px;background:rgba(6,11,22,.95);
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px rgba(0,0,0,.45);
}
@supports not (backdrop-filter:blur(14px)){
  .site-header{background:rgba(10,17,34,.92)}
  .card,.compare-wrap,.cta-panel,.faq-item{background:rgba(10,17,34,.92)}
}
.nav-inner{display:flex;align-items:center;gap:18px;width:100%}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;letter-spacing:-.01em;flex-shrink:0}
.brand .dot,.fb-logo .dot{width:9px;height:9px;border-radius:50%;background:var(--cyan);box-shadow:0 0 14px rgba(55,230,208,.9);display:inline-block}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{
  position:relative;padding:10px 14px;border-radius:10px;font-size:15px;color:var(--muted);
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.05)}
.nav-links a.active{color:#fff}
.nav-links a.active::after{
  content:"";position:absolute;left:20%;right:20%;bottom:2px;height:2px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 10px rgba(55,230,208,.8);
}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-search input{
  width:180px;padding:9px 14px;border-radius:var(--r-sm);
  background:var(--glass);border:1px solid var(--line);color:var(--text);font-size:14px;
  transition:border-color .2s ease,box-shadow .2s ease,width .2s ease;
}
.nav-search input::placeholder{color:var(--muted-2)}
.nav-search input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(55,230,208,.16);width:220px}
.icon-btn{
  width:38px;height:38px;display:none;align-items:center;justify-content:center;
  border-radius:10px;background:var(--glass);border:1px solid var(--line);
  color:var(--muted);cursor:pointer;transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.icon-btn:hover{color:#fff;border-color:var(--cyan)}
.icon-btn.menu-btn{display:none}

.mobile-panel{
  position:fixed;top:0;left:0;right:0;bottom:0;z-index:79;
  background:rgba(6,11,22,.97);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  padding:88px 24px 32px;display:none;flex-direction:column;gap:6px;
}
.mobile-panel.open{display:flex}
.mobile-panel a{
  height:48px;display:flex;align-items:center;padding:0 16px;border-radius:var(--r-sm);
  color:var(--muted);font-size:16px;border:1px solid transparent;
}
.mobile-panel a.active{color:#fff;background:var(--glass);border-color:var(--line)}
.mobile-panel .btn{margin-top:auto}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;padding:150px 0 76px;min-height:46vh;
  background-image:linear-gradient(180deg,rgba(6,11,22,.72),rgba(6,11,22,.95)),
    url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;top:-160px;right:-120px;width:560px;height:560px;
  background:radial-gradient(circle,rgba(47,124,255,.34),transparent 62%);
  pointer-events:none;
}
.page-hero::before{
  content:"";position:absolute;left:-100px;bottom:-140px;width:420px;height:420px;
  background:radial-gradient(circle,rgba(55,230,208,.16),transparent 64%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;max-width:760px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted-2);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--muted);transition:color .2s ease}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep::before{content:"›";margin-right:4px}
.breadcrumb .current{color:var(--text)}
.hero-brandline{font-size:14px;color:var(--cyan);letter-spacing:.08em;margin-bottom:14px}
.hero-lead{margin-top:18px;font-size:17px;color:var(--muted);max-width:640px}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}

/* ---------- 对比区 ---------- */
.compare-wrap{
  margin-top:8px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--glass);box-shadow:var(--sh-1);overflow:hidden;
}
.compare-head{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid var(--line)}
.col-head{padding:20px 26px;display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px}
.col-head.free{color:var(--muted);background:var(--glass-2)}
.col-head.vip{color:#fff;background:linear-gradient(180deg,rgba(55,230,208,.16),rgba(47,124,255,.08));border-left:1px solid var(--line)}
.compare-body{display:grid;grid-template-columns:1fr 1fr}
.crow{padding:18px 26px;border-top:1px solid var(--line-soft);transition:background .2s ease}
.crow:first-child,.crow:nth-child(2){border-top:0}
.crow.free{background:rgba(255,255,255,.015)}
.crow.vip{background:rgba(55,230,208,.05);border-left:1px solid var(--line)}
.crow:hover{background:rgba(255,255,255,.06)}
.crow-label{display:block;font-size:13px;color:var(--muted-2);letter-spacing:.02em}
.crow-val{display:block;margin-top:6px;font-size:15px;color:var(--text)}
.crow.vip .crow-val{color:#fff}
.val-yes{color:var(--cyan)}
.val-no{color:var(--muted-2)}
.val-num{font-family:var(--mono);color:#fff}
.compare-note{margin-top:18px;font-size:13px;color:var(--muted-2);line-height:1.8}

/* ---------- 数据卡 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat-card{
  padding:26px 24px;border-radius:var(--r-card);background:var(--glass);
  border:1px solid var(--line);box-shadow:var(--sh-1);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.stat-card:hover{transform:translateY(-4px);border-color:rgba(55,230,208,.4);box-shadow:var(--sh-2)}
.stat-num{font-family:var(--mono);font-size:32px;font-weight:700;color:var(--lime);line-height:1.1}
.stat-label{margin-top:10px;font-size:14px;color:var(--text)}
.stat-desc{margin-top:6px;font-size:13px;color:var(--muted-2);line-height:1.7}

/* ---------- 升级路径 ---------- */
.ladder{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:12px}
.step{
  position:relative;padding:28px 22px 28px 0;
  border-left:1px solid var(--line-soft);
}
.step:first-child{border-left:0;padding-left:0}
.step:not(:first-child){padding-left:26px}
.step-dot{
  width:12px;height:12px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 16px rgba(55,230,208,.85);margin-bottom:18px;
}
.step.locked .step-dot{background:var(--muted-2);box-shadow:none}
.step-idx{font-family:var(--mono);font-size:13px;color:var(--muted-2);letter-spacing:.12em}
.step h3{margin-top:8px;font-size:18px}
.step ul{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.step li{position:relative;padding-left:16px;font-size:14px;color:var(--muted);line-height:1.7}
.step li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--primary)}
.step .unlock{margin-top:16px;font-size:13px;color:var(--muted-2);border-top:1px dashed var(--line);padding-top:12px}
.step.featured{
  background:linear-gradient(180deg,rgba(47,124,255,.14),rgba(55,230,208,.04));
  border-radius:var(--r-card);border:1px solid rgba(55,230,208,.35);
  transform:scale(1.03);padding:28px 22px;margin:0 6px;
  box-shadow:var(--sh-2);
}

/* ---------- 场景图文 ---------- */
.scene{display:grid;grid-template-columns:1.05fr 1fr;gap:52px;align-items:center}
.scene-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1)}
.scene-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .35s ease}
.scene-media:hover img{transform:scale(1.03)}
.scene-tag{
  position:absolute;left:16px;top:16px;padding:5px 12px;border-radius:999px;font-size:12px;
  background:rgba(6,11,22,.75);border:1px solid var(--line);color:var(--cyan);
  backdrop-filter:blur(8px);
}
.scene-list{margin-top:26px;display:flex;flex-direction:column;gap:16px}
.scene-item{display:flex;gap:14px;padding:16px 18px;border-radius:var(--r-sm);background:var(--glass-2);border:1px solid var(--line-soft)}
.scene-item i{color:var(--cyan);margin-top:5px;font-size:15px}
.scene-item strong{display:block;font-size:15px;color:#fff;font-weight:600}
.scene-item span{display:block;margin-top:4px;font-size:14px;color:var(--muted);line-height:1.7}

/* ---------- FAQ ---------- */
.faq{margin-top:8px;border-top:1px solid var(--line-soft)}
.faq-item{border-bottom:1px solid var(--line-soft)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--text);transition:color .2s ease;
}
.faq-q:hover{color:#fff}
.faq-q i{color:var(--cyan);font-size:14px;transition:transform .2s ease;flex-shrink:0}
.faq-item.open .faq-q i{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-item.open .faq-a{max-height:340px}
.faq-a p{padding:0 4px 24px 8px;font-size:15px;color:var(--muted);line-height:1.8}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid rgba(55,230,208,.35);
  background-image:linear-gradient(100deg,rgba(6,11,22,.94),rgba(10,17,34,.86)),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  box-shadow:var(--sh-glow);
}
.cta-inner{padding:48px 46px;display:flex;align-items:center;justify-content:space-between;gap:32px;position:relative;z-index:2}
.cta-inner h2{font-size:clamp(20px,2.2vw,26px)}
.cta-inner p{margin-top:10px;color:var(--muted);font-size:15px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-shrink:0}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line-soft);background:var(--bg-2);padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.5fr;gap:40px}
.fb-logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--muted);line-height:1.85;max-width:360px}
.footer-col h4{font-size:15px;margin-bottom:18px;color:#fff}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:var(--muted);transition:color .2s ease,transform .2s ease;display:inline-block}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-note strong{display:block;font-size:14px;color:#fff;margin-bottom:12px}
.footer-note p{font-size:12px;color:var(--muted-2);line-height:1.9}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid var(--line-soft);
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:12px;color:var(--muted-2);
}
.fb-links{display:flex;gap:20px;flex-wrap:wrap}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .section{padding:72px 0}
  .nav-links{display:none}
  .icon-btn{display:inline-flex}
  .icon-btn.menu-btn{display:inline-flex}
  .nav-search{display:none}
  .nav-search.open{
    display:block;position:absolute;left:0;right:0;top:calc(100% + 8px);
    padding:0 24px;
  }
  .nav-search.open input{width:100%}
  .site-header .nav-inner{position:relative}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .ladder{grid-template-columns:repeat(2,1fr)}
  .step:nth-child(3){border-left:0;padding-left:0}
  .step.featured{transform:none;margin:0}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .scene{grid-template-columns:1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:768px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .page-hero{padding:118px 0 56px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .compare-head{display:none}
  .compare-body{grid-template-columns:1fr}
  .crow{border-top:1px solid var(--line-soft);border-left:0!important}
  .crow::before{
    content:attr(data-col);display:block;font-size:12px;letter-spacing:.08em;
    color:var(--muted-2);margin-bottom:8px;
  }
  .crow.vip::before{color:var(--cyan)}
  .crow:first-child{border-top:0}
  .stat-grid{grid-template-columns:1fr 1fr;gap:14px}
  .ladder{grid-template-columns:1fr;gap:14px}
  .step,.step:not(:first-child){border-left:0;padding:20px 18px;border:1px solid var(--line-soft);border-radius:var(--r-card)}
  .cta-inner{padding:32px 22px}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;gap:10px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category4 */
:root{
  --c-blue:#2F7CFF;
  --c-cyan:#37E6D0;
  --c-lime:#C6FF4F;
  --bg:#060B16;
  --bg-2:#0A1122;
  --text:#E8EEF9;
  --muted:#9AA9C2;
  --line:rgba(255,255,255,.12);
  --glass:rgba(255,255,255,.06);
  --radius:16px;
  --radius-sm:12px;
  --shadow-1:0 10px 30px rgba(0,0,0,.35);
  --shadow-2:0 18px 45px rgba(47,124,255,.28);
  --glow:0 0 0 1px rgba(55,230,208,.45),0 12px 34px rgba(47,124,255,.45);
  --maxw:1200px;
  --mono:ui-monospace,"Roboto Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;background:var(--bg);color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.85;letter-spacing:0;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,transform .2s ease;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul{list-style:none;}
input{font:inherit;}
h1,h2,h3,h4{line-height:1.28;font-weight:700;letter-spacing:-0.01em;}
:focus-visible{outline:2px solid var(--c-lime);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}

/* ---------- header / nav ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  background:rgba(6,11,22,.32);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:background .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.site-header.is-stuck{
  background:rgba(6,11,22,.95);
  border-bottom-color:rgba(255,255,255,.14);
  box-shadow:0 14px 34px rgba(0,0,0,.45);
}
.nav-inner{display:flex;align-items:center;gap:26px;height:72px;transition:height .22s ease;}
.site-header.is-stuck .nav-inner{height:60px;}
.brand{display:inline-flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:#fff;white-space:nowrap;}
.brand .dot,.fb-logo .dot{
  width:10px;height:10px;border-radius:50%;flex:0 0 auto;
  background:linear-gradient(130deg,var(--c-blue),var(--c-cyan));
  box-shadow:0 0 12px rgba(55,230,208,.7);
}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:12px;}
.nav-links a{
  position:relative;font-size:15px;color:var(--muted);padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:20%;right:20%;bottom:-4px;height:2px;border-radius:2px;
  background:var(--c-cyan);opacity:0;transform:scaleX(.4);transition:opacity .2s ease,transform .2s ease;
}
.nav-links a:hover{color:#fff;}
.nav-links a:hover::after{opacity:.85;transform:scaleX(1);}
.nav-links a.active{color:var(--c-blue);}
.nav-links a.active::after{opacity:1;transform:scaleX(1);background:var(--c-blue);box-shadow:0 0 10px rgba(47,124,255,.8);}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
.nav-search{width:0;opacity:0;overflow:hidden;transition:width .24s ease,opacity .24s ease;}
.nav-search.open{width:200px;opacity:1;}
.nav-search input{
  width:100%;height:38px;border-radius:var(--radius-sm);padding:0 14px;font-size:14px;
  color:var(--text);background:rgba(255,255,255,.06);border:1px solid var(--line);
}
.nav-search input::placeholder{color:#7C8AA5;}
.nav-search input:focus{outline:none;border-color:rgba(55,230,208,.6);box-shadow:0 0 0 3px rgba(55,230,208,.16);}
.icon-btn{
  width:40px;height:40px;border-radius:var(--radius-sm);display:inline-flex;align-items:center;justify-content:center;
  color:var(--muted);background:rgba(255,255,255,.05);border:1px solid var(--line);
  transition:color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.icon-btn:hover{color:#fff;border-color:rgba(55,230,208,.5);transform:translateY(-1px);box-shadow:0 8px 20px rgba(47,124,255,.22);}
.menu-btn{display:none;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;
  border:1px solid transparent;white-space:nowrap;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,filter .2s ease;
}
.btn-primary{
  background:linear-gradient(120deg,var(--c-blue),var(--c-cyan));color:#fff;
  box-shadow:0 10px 30px rgba(0,0,0,.35);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:var(--glow);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:rgba(255,255,255,.05);color:var(--text);border-color:var(--line);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:rgba(55,230,208,.6);box-shadow:0 12px 28px rgba(47,124,255,.22);}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px;}

/* ---------- mobile menu ---------- */
.mobile-menu{
  position:fixed;inset:0;z-index:140;display:flex;flex-direction:column;
  padding:20px 24px 28px;background:rgba(6,11,22,.97);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  transform:translateY(-100%);visibility:hidden;
  transition:transform .24s ease,visibility .24s ease;
}
.mobile-menu.open{transform:translateY(0);visibility:visible;}
.mm-head{display:flex;align-items:center;justify-content:space-between;height:52px;}
.mm-search{margin:16px 0 8px;}
.mm-search input{
  width:100%;height:46px;border-radius:var(--radius-sm);padding:0 16px;font-size:15px;
  color:var(--text);background:rgba(255,255,255,.06);border:1px solid var(--line);
}
.mm-links{margin-top:8px;display:flex;flex-direction:column;}
.mm-links a{
  display:flex;align-items:center;height:48px;font-size:16px;color:var(--muted);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.mm-links a.active{color:var(--c-cyan);}
.mm-foot{margin-top:auto;padding-top:20px;}
.mm-foot .btn{width:100%;}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;padding:148px 0 68px;min-height:42vh;
  display:flex;align-items:center;
  background:var(--bg-2) url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,11,22,.78) 0%,rgba(6,11,22,.92) 62%,rgba(6,11,22,.98) 100%);
}
.hero-glow{
  position:absolute;width:560px;height:560px;right:-140px;top:-200px;pointer-events:none;
  background:radial-gradient(circle,rgba(47,124,255,.38),rgba(47,124,255,0) 70%);
  opacity:.85;
}
.hero-mesh{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 72% 18%,#000 0%,transparent 68%);
  mask-image:radial-gradient(circle at 72% 18%,#000 0%,transparent 68%);
}
.hero-inner{position:relative;z-index:2;max-width:800px;}
.crumbs{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin-bottom:18px;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--c-cyan);}
.crumbs .cur{color:var(--text);}
.hero h1{font-size:clamp(28px,4.2vw,44px);margin-bottom:18px;}
.hero-sub{color:var(--muted);font-size:17px;max-width:640px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:30px;margin-top:34px;}
.hero-stats .stat{padding-left:16px;border-left:1px solid var(--line);display:flex;flex-direction:column;}
.hero-stats .num{font-family:var(--mono);font-size:24px;color:#fff;line-height:1.3;}
.hero-stats .lbl{font-size:13px;color:var(--muted);}

/* ---------- section base ---------- */
.section{padding:88px 0;position:relative;}
.section--alt{background:var(--bg-2);}
.section--alt::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(700px 320px at 12% 0%,rgba(55,230,208,.09),transparent 70%);
}
.section .container{position:relative;z-index:2;}
.sec-head{max-width:780px;margin-bottom:38px;}
.sec-head h2{font-size:clamp(22px,2.6vw,32px);margin-bottom:14px;}
.sec-head p{color:var(--muted);}
.sec-head--split{max-width:none;display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}

/* ---------- chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px;}
.chip{
  display:inline-flex;align-items:center;padding:8px 16px;border-radius:999px;
  font-size:14px;color:var(--muted);background:rgba(255,255,255,.05);border:1px solid var(--line);
  transition:color .2s ease,border-color .2s ease,transform .2s ease,background .2s ease;
}
.chip:hover{color:#fff;border-color:rgba(55,230,208,.5);transform:translateY(-1px);}
.chip.is-active{
  color:#06121f;font-weight:600;border-color:transparent;
  background:linear-gradient(120deg,var(--c-lime),var(--c-cyan));
  box-shadow:0 0 0 1px rgba(198,255,79,.4),0 10px 24px rgba(55,230,208,.24);
}

/* ---------- content wall ---------- */
.wall{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.xcard{
  position:relative;display:flex;flex-direction:column;border-radius:var(--radius);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);box-shadow:var(--shadow-1);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  .xcard{background:rgba(10,17,34,.92);}
}
.xcard:hover{transform:translateY(-4px);border-color:rgba(55,230,208,.45);box-shadow:var(--shadow-2);}
.xcard--wide{grid-column:span 2;}
.xcard .thumb{overflow:hidden;border-bottom:1px solid var(--line);}
.xcard .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease;}
.xcard:hover .thumb img{transform:scale(1.03);}
.xcard-body{padding:22px 22px 20px;display:flex;flex-direction:column;gap:12px;flex:1;}
.xcard h3{font-size:18px;line-height:1.45;}
.xcard p{color:var(--muted);font-size:14px;line-height:1.8;}
.xcard-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--muted);
}
.xcard-foot .lvl{font-family:var(--mono);color:var(--text);}
.xcard-foot .arrow{color:var(--c-cyan);}
.pill{
  display:inline-flex;align-items:center;align-self:flex-start;
  padding:5px 12px;border-radius:999px;font-size:12px;line-height:1.6;
  color:var(--text);background:rgba(255,255,255,.06);border:1px solid var(--line);
}
.pill--cyan{color:#03202a;background:linear-gradient(120deg,var(--c-cyan),#7ff0e3);border-color:transparent;}
.pill--lime{color:#16210a;background:var(--c-lime);border-color:transparent;box-shadow:0 0 14px rgba(198,255,79,.45);}
.note{margin-top:22px;font-size:13px;color:#7C8AA5;}

/* ---------- range list ---------- */
.range-list{display:grid;gap:14px;}
.range-item{
  display:grid;grid-template-columns:150px 1fr 110px;align-items:center;gap:20px;
  padding:18px 22px;border-radius:var(--radius);border:1px solid var(--line);
  background:rgba(255,255,255,.04);transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.range-item:hover{background:rgba(255,255,255,.07);border-color:rgba(55,230,208,.36);transform:translateX(2px);}
.range-item.is-top{border-color:rgba(198,255,79,.35);box-shadow:0 0 0 1px rgba(198,255,79,.14),0 14px 34px rgba(47,124,255,.2);}
.r-name{display:flex;align-items:center;gap:10px;font-size:15px;color:#fff;}
.bar{height:8px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden;}
.bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--c-blue),var(--c-cyan));}
.bar .w20{width:20%;}
.bar .w45{width:45%;}
.bar .w70{width:70%;}
.bar .w100{width:100%;}
.r-num{font-family:var(--mono);font-size:16px;color:#fff;text-align:right;}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.step{
  position:relative;padding:26px 22px;border-radius:var(--radius);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.step:hover{transform:translateY(-4px);border-color:rgba(55,230,208,.42);box-shadow:var(--shadow-2);}
.step-num{font-family:var(--mono);font-size:30px;line-height:1;color:rgba(55,230,208,.9);}
.step h3{font-size:17px;margin:14px 0 10px;}
.step p{font-size:14px;color:var(--muted);}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 0;text-align:left;font-size:17px;font-weight:600;color:var(--text);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-cyan);}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;color:var(--c-cyan);background:rgba(55,230,208,.1);border:1px solid rgba(55,230,208,.32);
  transition:transform .2s ease,background .2s ease;
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:rgba(198,255,79,.14);border-color:rgba(198,255,79,.4);color:var(--c-lime);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease;}
.faq-item.open .faq-a{max-height:340px;}
.faq-a p{padding:0 0 20px 8px;font-size:15px;line-height:1.8;color:var(--muted);}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:20px;padding:46px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
  border:1px solid rgba(55,230,208,.28);
  background:var(--bg-2) url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  box-shadow:var(--shadow-1);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(6,11,22,.95) 0%,rgba(6,11,22,.78) 60%,rgba(6,11,22,.6) 100%);
}
.cta-copy{position:relative;z-index:2;max-width:620px;}
.cta-copy h2{font-size:clamp(20px,2.4vw,28px);margin-bottom:12px;}
.cta-copy p{color:var(--muted);font-size:15px;}
.cta-actions{position:relative;z-index:2;display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{
  background:#04080F;border-top:1px solid var(--line);
  padding:64px 0 26px;margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.5fr;gap:34px;}
.fb-logo{display:inline-flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-brand p{color:var(--muted);font-size:14px;line-height:1.8;max-width:330px;}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{display:inline-block;color:var(--muted);font-size:14px;}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-note strong{display:block;font-size:15px;color:#fff;margin-bottom:14px;}
.footer-note p{color:#7C8AA5;font-size:12px;line-height:1.8;}
.footer-bottom{
  margin-top:42px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  color:#7C8AA5;font-size:12px;
}
.fb-links{display:flex;gap:20px;flex-wrap:wrap;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .nav-links{display:none;}
  .nav-search,#searchToggle{display:none;}
  .menu-btn{display:inline-flex;}
  .wall{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .section{padding:64px 0;}
  .hero{padding:132px 0 58px;}
}
@media (max-width:768px){
  .range-item{grid-template-columns:1fr;gap:12px;align-items:flex-start;}
  .r-num{text-align:left;}
  .cta-band{padding:32px 24px;flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 100%;}
  .sec-head--split{align-items:flex-start;}
}
@media (max-width:640px){
  .container{padding:0 18px;}
  .section{padding:52px 0;}
  .wall{grid-template-columns:1fr;}
  .xcard--wide{grid-column:auto;}
  .steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .btn{width:100%;}
  .btn-sm{width:auto;}
  .hero-stats{gap:20px;}
  .hero-stats .stat{min-width:88px;}
  .faq-q{font-size:16px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}