/* roulang page: index */
:root{
  --bg:#0A0F1F;
  --bg-soft:#0D1530;
  --panel:rgba(255,255,255,0.04);
  --panel-solid:#111A30;
  --text:#EAF0FA;
  --text-weak:#A6ADBF;
  --primary:#00F0C8;
  --secondary:#FF3C6E;
  --accent:#FFB020;
  --grad-main:linear-gradient(135deg,#00F0C8, #26C6FF, #FF3C6E);
  --border:rgba(255,255,255,0.08);
  --border-light:rgba(255,255,255,0.14);
  --shadow-card:0 12px 30px -12px rgba(0,0,0,0.8);
  --shadow-glow:0 8px 32px -4px rgba(0,240,200,0.35);
  --shadow-pink:0 8px 32px -4px rgba(255,60,110,0.35);
  --radius-lg:24px;
  --radius-md:16px;
  --radius-sm:10px;
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-en:"Space Grotesk","DIN Alternate","Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:
    radial-gradient(circle at 10% 0%,rgba(0,240,200,0.08),transparent 30%),
    radial-gradient(circle at 90% 10%,rgba(255,60,110,0.07),transparent 30%),
    linear-gradient(180deg,#0A0F1F,#0B1023 60%,#0A0F1F);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:var(--primary);text-decoration:none;transition:color .25s ease,box-shadow .25s ease}
img{max-width:100%;display:block}
ul{list-style:none}
button{font-family:inherit}
input,select,button{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:clamp(64px,8vw,96px) 0;position:relative}
.panel{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:clamp(24px,4vw,48px);
  box-shadow:var(--shadow-card);
  position:relative;
  overflow:hidden;
}
.panel::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--grad-main);
  opacity:.7;
}
.section-head{
  text-align:center;
  max-width:720px;
  margin:0 auto 48px;
}
.section-head-left{
  text-align:left;
  margin-left:0;
}
.section-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(0,240,200,0.1);
  border:1px solid rgba(0,240,200,0.3);
  color:var(--primary);
  font-size:13px;
  font-weight:600;
  letter-spacing:2px;
  padding:6px 16px;
  border-radius:999px;
  margin-bottom:16px;
}
.section-tag::before{
  content:"";
  width:6px;height:6px;
  background:var(--primary);
  border-radius:50%;
  box-shadow:0 0 8px var(--primary);
}
.section-head h2{
  font-size:clamp(1.6rem,3vw,2.4rem);
  font-weight:800;
  letter-spacing:-.5px;
  line-height:1.25;
  margin-bottom:12px;
}
.section-head p{
  color:var(--text-weak);
  font-size:15px;
}
h3{font-size:1.15rem;font-weight:700;line-height:1.4}
h4{font-size:1rem;font-weight:700;line-height:1.4}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:12px 28px;
  border-radius:var(--radius-sm);
  border:1px solid transparent;
  font-weight:600;
  font-size:15px;
  line-height:1;
  cursor:pointer;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease,filter .25s ease;
  white-space:nowrap;
  background:var(--panel);
  color:var(--text);
}
.btn-primary{
  background:var(--grad-main);
  color:#0A0F1F;
  border:none;
  font-weight:700;
  box-shadow:0 0 20px rgba(0,240,200,0.25);
}
.btn-primary:hover{
  transform:translateY(-2px);
  filter:brightness(1.1);
  box-shadow:var(--shadow-glow);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.95)}
.btn-glow{box-shadow:0 0 24px rgba(0,240,200,0.35)}
.btn-outline{
  background:transparent;
  border-color:rgba(0,240,200,0.4);
  color:var(--text);
}
.btn-outline:hover{
  background:rgba(0,240,200,0.08);
  border-color:var(--primary);
  box-shadow:0 0 16px rgba(0,240,200,0.2);
  transform:translateY(-2px);
}
.btn-outline:active{transform:translateY(0)}
.btn-block{width:100%}
.btn-submit.success{
  background:var(--primary);
  color:#0A0F1F;
  box-shadow:0 8px 32px -4px rgba(0,240,200,0.4);
}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:600;
  font-size:15px;
  color:var(--primary);
}
.link-more .arrow{transition:transform .25s ease,color .25s ease}
.link-more:hover .arrow{transform:translateX(5px)}
.link-more:hover{color:#fff}

.tag{
  display:inline-flex;
  align-items:center;
  padding:4px 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.5px;
  line-height:1.4;
}
.tag-cat{
  background:rgba(0,240,200,0.16);
  color:var(--primary);
  border:1px solid rgba(0,240,200,0.3);
}
.tag-hot{
  background:rgba(255,60,110,0.18);
  color:var(--secondary);
  border:1px solid rgba(255,60,110,0.4);
}
.tag-new{
  background:rgba(255,176,32,0.16);
  color:var(--accent);
  border:1px solid rgba(255,176,32,0.4);
}

.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1000;
  background:rgba(10,15,31,0.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.site-header::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:3px;
  background:var(--grad-main);
  opacity:.85;
}
.header-inner{
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:800;
  font-size:20px;
  color:var(--text);
  letter-spacing:.5px;
  white-space:nowrap;
}
.brand-logo{
  background:var(--grad-main);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  font-weight:900;
}
.brand-name{
  font-weight:700;
  color:var(--text);
}
.brand:hover{color:var(--text)}
.main-nav{
  display:flex;
  align-items:center;
  gap:32px;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:28px;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  font-size:15px;
  font-weight:500;
  color:var(--text-weak);
  padding:8px 2px;
  transition:color .25s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--primary);
  border-radius:2px;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s ease,box-shadow .3s ease;
}
.nav-link:hover{
  color:var(--text);
}
.nav-link:hover::after{
  transform:scaleX(1);
  box-shadow:0 0 12px var(--primary);
}
.nav-link.active{
  color:#fff;
}
.nav-link.active::after{
  transform:scaleX(1);
  box-shadow:0 0 14px var(--primary),0 0 28px rgba(0,240,200,0.4);
}
.nav-cta{
  padding:10px 22px;
  font-size:14px;
}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:44px;
  height:44px;
  background:transparent;
  border:1px solid var(--border);
  border-radius:10px;
  cursor:pointer;
  padding:10px;
  transition:border-color .3s,box-shadow .3s;
}
.nav-toggle:hover{
  border-color:var(--primary);
  box-shadow:0 0 14px rgba(0,240,200,0.2);
}
.nav-toggle-bar{
  display:block;
  height:2px;
  width:100%;
  background:var(--text);
  border-radius:2px;
  transition:transform .3s ease,opacity .3s ease;
}
.nav-toggle.active .nav-toggle-bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active .nav-toggle-bar:nth-child(2){opacity:0}
.nav-toggle.active .nav-toggle-bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.hero{
  position:relative;
  min-height:92vh;
  display:flex;
  align-items:center;
  padding:140px 0 80px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  background:url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  transform:scale(1.05);
}
.hero-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(10,15,31,0.5) 0%,rgba(10,15,31,0.25) 40%,rgba(10,15,31,0.9) 100%);
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background:
    radial-gradient(circle at 20% 30%,rgba(0,240,200,0.18),transparent 40%),
    radial-gradient(circle at 80% 15%,rgba(255,60,110,0.12),transparent 35%);
  pointer-events:none;
  z-index:1;
}
.hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.03) 1px,transparent 1px);
  background-size:60px 60px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,0.3),transparent 70%);
  pointer-events:none;
  z-index:1;
}
.hero-content{
  position:relative;
  z-index:2;
  max-width:880px;
  margin:0 auto;
  text-align:center;
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  font-weight:600;
  letter-spacing:3px;
  color:var(--text-weak);
  background:rgba(255,255,255,0.05);
  border:1px solid var(--border);
  padding:8px 20px;
  border-radius:999px;
  margin-bottom:28px;
  backdrop-filter:blur(8px);
}
.hero-eyebrow::before{
  content:"";
  width:8px;height:8px;
  background:var(--primary);
  border-radius:50%;
  box-shadow:0 0 12px var(--primary);
}
.hero h1{
  font-size:clamp(2.4rem,5vw,4rem);
  font-weight:900;
  line-height:1.15;
  letter-spacing:-1px;
  margin-bottom:20px;
  color:#fff;
  text-shadow:0 4px 30px rgba(0,0,0,0.5);
}
.hero-sub{
  font-size:clamp(15px,2vw,18px);
  color:rgba(234,240,250,0.85);
  line-height:1.75;
  max-width:600px;
  margin:0 auto 32px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:16px;
  margin-bottom:48px;
}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:16px;
}
.stat-badge{
  display:flex;
  flex-direction:column;
  gap:4px;
  min-width:120px;
  background:rgba(255,255,255,0.07);
  border:1px solid rgba(255,255,255,0.14);
  backdrop-filter:blur(10px);
  border-radius:var(--radius-md);
  padding:18px 24px;
  text-align:left;
  box-shadow:inset 0 1px 0 rgba(255,255,255,0.1);
  transition:transform .3s,box-shadow .3s,border-color .3s;
}
.stat-badge:hover{
  transform:translateY(-4px);
  border-color:rgba(0,240,200,0.5);
  box-shadow:0 12px 32px -8px rgba(0,240,200,0.3);
}
.stat-num{
  font-family:var(--font-en),var(--font-cn);
  background:var(--grad-main);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  font-size:36px;
  font-weight:900;
  line-height:1.1;
}
.stat-label{
  font-size:13px;
  color:var(--text-weak);
}

.news-section{
  background:linear-gradient(180deg,transparent,rgba(255,255,255,0.02) 40%,transparent);
  padding-top:80px;
}
.news-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.news-card{
  background:var(--panel-solid);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
  display:flex;
  flex-direction:column;
}
.news-card:hover{
  transform:translateY(-5px);
  border-color:rgba(0,240,200,0.45);
  box-shadow:var(--shadow-glow);
}
.news-card-cover{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
}
.news-card-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.news-card:hover .news-card-cover img{
  transform:scale(1.06);
}
.news-card-cover::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 55%,rgba(10,15,31,0.7));
}
.news-card-cover .tag{
  position:absolute;
  left:14px;top:14px;
  z-index:2;
}
.news-card-body{
  padding:20px 20px 22px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.news-title{
  font-size:1.05rem;
  line-height:1.5;
  margin-bottom:8px;
}
.news-title a{
  color:var(--text);
}
.news-title a:hover{
  color:var(--primary);
}
.news-summary{
  font-size:14px;
  color:var(--text-weak);
  line-height:1.65;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:16px;
}
.news-meta{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  border-top:1px solid var(--border);
  padding-top:14px;
}
.news-date{
  font-size:13px;
  color:var(--text-weak);
  font-family:var(--font-en),var(--font-cn);
}
.read-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--primary);
}
.read-more .arrow{
  transition:transform .25s ease;
}
.read-more:hover .arrow{
  transform:translateX(4px);
}
.read-more:hover{
  color:#fff;
}
.empty-state{
  grid-column:1 / -1;
  background:rgba(255,255,255,0.03);
  border:1px dashed rgba(255,255,255,0.14);
  border-radius:var(--radius-md);
  padding:60px 24px;
  text-align:center;
  color:var(--text-weak);
}
.empty-icon{
  font-size:48px;
  color:rgba(0,240,200,0.4);
  margin-bottom:12px;
}

.timeline-section{
  padding-bottom:0;
}
.timeline{
  position:relative;
  padding-left:44px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:9px;
  top:8px;
  bottom:8px;
  width:2px;
  background:linear-gradient(180deg,var(--primary),var(--secondary));
  opacity:.6;
  border-radius:2px;
}
.timeline-item{
  position:relative;
  padding-bottom:40px;
}
.timeline-item:last-child{
  padding-bottom:0;
}
.timeline-marker{
  position:absolute;
  left:-44px;
  top:8px;
  width:18px;
  height:18px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 0 6px rgba(0,240,200,0.14),0 0 20px rgba(0,240,200,0.55);
}
.timeline-card{
  background:rgba(255,255,255,0.035);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  padding:24px 28px;
  transition:border-color .3s ease,box-shadow .3s ease,transform .3s ease;
}
.timeline-card:hover{
  border-color:rgba(0,240,200,0.4);
  box-shadow:0 8px 28px -8px rgba(0,240,200,0.25);
  transform:translateY(-2px);
}
.timeline-time{
  font-family:var(--font-en),var(--font-cn);
  font-size:28px;
  font-weight:800;
  color:var(--primary);
  line-height:1.1;
  margin-bottom:6px;
}
.timeline-body h3{
  margin-bottom:6px;
}
.timeline-body p{
  color:var(--text-weak);
  font-size:15px;
  line-height:1.7;
  max-width:760px;
}

.feature-section{
  background:linear-gradient(180deg,transparent,rgba(0,240,200,0.025) 50%,transparent);
}
.feature-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:24px;
}
.feature-card{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--border);
  box-shadow:var(--shadow-card);
  background-size:cover;
  background-position:center;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.feature-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-glow);
  border-color:rgba(0,240,200,0.4);
}
.feature-content{
  position:relative;
  z-index:2;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  min-height:420px;
  padding:36px;
}
.feature-content h3{
  font-size:clamp(1.4rem,2.4vw,2rem);
  margin-bottom:10px;
}
.feature-content p{
  color:rgba(234,240,250,0.85);
  max-width:460px;
  margin-bottom:24px;
}
.feature-stats{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
}
.stat-compact{
  min-width:auto;
  padding:14px 20px;
  background:rgba(10,15,31,0.6);
  border-color:rgba(255,255,255,0.2);
}
.stat-pink .stat-num{
  background:linear-gradient(135deg,#FF3C6E,#FFB020);
  -webkit-background-clip:text;
  background-clip:text;
}
.feature-side{
  display:grid;
  grid-template-rows:1fr auto;
  gap:24px;
}
.feature-small{
  min-height:180px;
  padding:28px;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  position:relative;
}
.feature-small h4{
  font-size:1.15rem;
  margin-bottom:6px;
}
.feature-small p{
  font-size:14px;
  color:var(--text-weak);
  max-width:300px;
}
.feature-accent{
  background:linear-gradient(135deg,rgba(0,240,200,0.12),rgba(255,60,110,0.1)),#111A30;
  padding:32px;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.feature-accent h4{
  font-size:1.2rem;
}
.feature-accent p{
  color:var(--text-weak);
  font-size:14px;
  margin-bottom:14px;
}

.pricing-section{
  background:linear-gradient(180deg,transparent,rgba(255,60,110,0.025) 50%,transparent);
}
.pricing-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  align-items:stretch;
}
.price-card{
  background:var(--panel-solid);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:36px 32px;
  display:flex;
  flex-direction:column;
  position:relative;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  box-shadow:var(--shadow-card);
}
.price-card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,255,255,0.18);
  box-shadow:0 20px 40px -16px rgba(0,0,0,0.8);
}
.price-hot{
  border:1px solid rgba(0,240,200,0.5);
  box-shadow:0 0 40px -8px rgba(0,240,200,0.35),var(--shadow-card);
  transform:scale(1.05);
  z-index:2;
  padding:44px 32px;
}
.price-hot:hover{
  transform:scale(1.05) translateY(-4px);
  box-shadow:0 0 50px -8px rgba(0,240,200,0.5),var(--shadow-glow);
}
.price-badge{
  position:absolute;
  top:-14px;left:50%;
  transform:translateX(-50%);
  background:var(--grad-main);
  color:#0A0F1F;
  font-size:12px;
  font-weight:800;
  letter-spacing:1px;
  padding:6px 18px;
  border-radius:999px;
  box-shadow:0 4px 16px rgba(0,240,200,0.4);
}
.price-name{
  font-size:1.15rem;
  font-weight:700;
  margin-bottom:14px;
  color:var(--text);
}
.price-value{
  font-family:var(--font-en),var(--font-cn);
  font-size:48px;
  font-weight:900;
  background:var(--grad-main);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  line-height:1.1;
  margin-bottom:6px;
}
.price-hot .price-value{
  background:var(--grad-main);
  -webkit-background-clip:text;
  background-clip:text;
}
.price-value span{
  font-size:14px;
  font-weight:500;
  color:var(--text-weak);
  background:none;
  -webkit-text-fill-color:var(--text-weak);
}
.price-list{
  margin:24px 0 32px;
  display:grid;
  gap:10px;
}
.price-list li{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:rgba(234,240,250,0.85);
}
.price-list li::before{
  content:"✓";
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:20px;height:20px;
  border-radius:50%;
  background:rgba(0,240,200,0.15);
  color:var(--primary);
  font-size:12px;
  font-weight:800;
  flex-shrink:0;
}
.price-list li.off-list{
  color:var(--text-weak);
  text-decoration:line-through;
}
.price-list li.off-list::before{
  content:"–";
  background:rgba(255,255,255,0.08);
  color:var(--text-weak);
}
.price-card .btn{
  margin-top:auto;
}
.pricing-note{
  text-align:center;
  font-size:13px;
  color:var(--text-weak);
  margin-top:32px;
}

.faq-layout{
  display:grid;
  grid-template-columns:4fr 8fr;
  gap:48px;
  align-items:start;
}
.faq-list{
  display:grid;
  gap:14px;
}
.faq-item details{
  background:rgba(255,255,255,0.035);
  border:1px solid var(--border);
  border-radius:14px;
  position:relative;
  transition:border-color .3s ease,box-shadow .3s ease;
  overflow:hidden;
}
.faq-item details::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:4px;
  background:var(--grad-main);
  opacity:0;
  transition:opacity .3s ease;
}
.faq-item details[open]{
  border-color:rgba(0,240,200,0.5);
  box-shadow:0 8px 28px -10px rgba(0,240,200,0.3);
}
.faq-item details[open]::before{
  opacity:1;
}
.faq-item summary{
  cursor:pointer;
  list-style:none;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
  padding:22px 24px;
  font-weight:600;
  color:var(--text);
  font-size:16px;
  line-height:1.5;
  user-select:none;
}
.faq-item summary::-webkit-details-marker{
  display:none;
}
.faq-icon{
  flex-shrink:0;
  width:28px;height:28px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:rgba(0,240,200,0.12);
  color:var(--primary);
  font-size:18px;
  font-weight:600;
  transition:transform .3s ease,background .3s ease,color .3s ease;
}
.faq-item details[open] .faq-icon{
  transform:rotate(45deg);
  background:rgba(0,240,200,0.25);
}
.faq-content{
  padding:0 24px 24px;
  color:var(--text-weak);
  font-size:14px;
  line-height:1.8;
}
.faq-content p{
  margin-bottom:8px;
}
.faq-content p:last-child{
  margin-bottom:0;
}

.signup-section{
  padding:40px 0 96px;
}
.signup-section .container{
  position:relative;
}
.signup-panel{
  position:relative;
  border-radius:var(--radius-lg);
  border:1px solid rgba(0,240,200,0.4);
  background:
    linear-gradient(135deg,rgba(0,240,200,0.08),rgba(255,60,110,0.06)),
    url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  padding:clamp(28px,5vw,64px);
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  overflow:hidden;
  box-shadow:0 0 60px -12px rgba(0,240,200,0.35);
}
.signup-panel::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(10,15,31,0.92) 0%,rgba(10,15,31,0.75) 60%,rgba(10,15,31,0.85) 100%);
}
.signup-copy{
  position:relative;
  z-index:1;
}
.signup-copy h2{
  font-size:clamp(1.6rem,3vw,2.4rem);
  font-weight:800;
  line-height:1.3;
  margin-bottom:14px;
}
.signup-copy p{
  color:var(--text-weak);
  font-size:15px;
  margin-bottom:28px;
  max-width:460px;
}
.signup-points{
  display:grid;
  gap:12px;
}
.signup-points li{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:15px;
  color:rgba(234,240,250,0.9);
}
.signup-points li i{
  color:var(--primary);
  font-size:16px;
}
.signup-form-wrap{
  position:relative;
  z-index:1;
  background:rgba(13,21,48,0.75);
  border:1px solid rgba(255,255,255,0.1);
  border-radius:var(--radius-lg);
  padding:clamp(24px,3vw,36px);
  backdrop-filter:blur(8px);
}
.cta-form{
  display:grid;
  gap:18px;
}
.form-group{
  display:flex;
  flex-direction:column;
  gap:6px;
}
.form-label{
  font-size:14px;
  font-weight:600;
  color:var(--text);
}
.form-input{
  width:100%;
  background:rgba(0,0,0,0.3);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:8px;
  padding:14px 16px;
  color:var(--text);
  font-size:15px;
  transition:border-color .3s ease,box-shadow .3s ease;
  line-height:1.4;
}
.form-input::placeholder{
  color:rgba(166,173,191,0.6);
}
.form-input:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(0,240,200,0.15);
  outline:none;
}
select.form-input{
  appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23A6ADBF' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 16px center;
  padding-right:40px;
}
select.form-input option{
  background:var(--panel-solid);
  color:var(--text);
}
.form-error{
  display:none;
  font-size:13px;
  color:var(--secondary);
  margin-top:2px;
}
.form-group.invalid .form-input{
  border-color:var(--secondary);
  box-shadow:0 0 0 3px rgba(255,60,110,0.15);
}
.form-group.invalid .form-error{
  display:block;
}
.form-agree{
  font-size:12px;
  color:var(--text-weak);
  text-align:center;
  line-height:1.6;
}
.btn-submit{
  box-shadow:0 8px 24px -8px rgba(0,240,200,0.5);
}

.site-footer{
  background:rgba(10,15,31,0.9);
  border-top:1px solid var(--border);
  position:relative;
  padding:64px 0 0;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:3px;
  background:var(--grad-main);
  opacity:.6;
}
.footer-main{
  display:grid;
  grid-template-columns:5fr 3fr 4fr;
  gap:48px;
  padding-bottom:48px;
}
.footer-brand .brand{
  font-size:20px;
  margin-bottom:16px;
}
.footer-brand p{
  color:var(--text-weak);
  font-size:14px;
  line-height:1.7;
  max-width:360px;
  margin-bottom:20px;
}
.footer-socials{
  display:flex;
  gap:12px;
}
.footer-socials a{
  width:40px;
  height:40px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:10px;
  background:rgba(255,255,255,0.05);
  border:1px solid var(--border);
  color:var(--text-weak);
  transition:all .3s ease;
}
.footer-socials a:hover{
  color:var(--primary);
  border-color:var(--primary);
  box-shadow:0 0 16px rgba(0,240,200,0.2);
  transform:translateY(-2px);
}
.footer-links h4,
.footer-contact h4{
  font-size:15px;
  font-weight:700;
  margin-bottom:18px;
  color:#fff;
}
.footer-links ul,
.footer-contact ul{
  display:grid;
  gap:10px;
}
.footer-links a{
  color:var(--text-weak);
  font-size:14px;
}
.footer-links a:hover{
  color:var(--primary);
}
.footer-contact li{
  color:var(--text-weak);
  font-size:14px;
  line-height:1.7;
}
.footer-bottom{
  border-top:1px solid var(--border);
  padding:20px 0 28px;
  text-align:center;
  font-size:13px;
  color:var(--text-weak);
}

@media (max-width: 1024px){
  .container{
    padding:0 20px;
  }
  .nav-toggle{
    display:flex;
  }
  .main-nav{
    position:fixed;
    top:74px;
    left:0;
    right:0;
    background:rgba(10,15,31,0.98);
    border-bottom:1px solid var(--border);
    backdrop-filter:blur(16px);
    flex-direction:column;
    align-items:stretch;
    gap:24px;
    padding:28px 24px 32px;
    transform:translateY(-16px);
    opacity:0;
    pointer-events:none;
    visibility:hidden;
    transition:opacity .3s ease,transform .3s ease,visibility .3s;
    box-shadow:0 20px 40px rgba(0,0,0,0.6);
  }
  .main-nav.open{
    opacity:1;
    transform:translateY(0);
    pointer-events:auto;
    visibility:visible;
  }
  .nav-list{
    flex-direction:column;
    width:100%;
    gap:0;
  }
  .nav-list li{
    width:100%;
  }
  .nav-link{
    width:100%;
    display:block;
    font-size:18px;
    padding:14px 16px;
    border-bottom:1px solid rgba(255,255,255,0.06);
    border-radius:8px;
    transition:background .3s,color .3s;
  }
  .nav-link::after{
    display:none;
  }
  .nav-link.active{
    background:rgba(0,240,200,0.1);
    color:var(--primary);
  }
  .nav-link:hover{
    background:rgba(255,255,255,0.04);
    color:#fff;
  }
  .nav-cta{
    width:100%;
    text-align:center;
  }
  .news-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .feature-grid{
    grid-template-columns:1fr;
  }
  .feature-side{
    grid-template-columns:1fr 1fr;
    grid-template-rows:none;
  }
  .pricing-grid{
    grid-template-columns:1fr;
    max-width:480px;
    margin:0 auto;
    gap:32px;
  }
  .price-hot{
    transform:scale(1);
  }
  .price-hot:hover{
    transform:translateY(-4px) scale(1);
  }
  .faq-layout{
    grid-template-columns:1fr;
    gap:32px;
  }
  .signup-panel{
    grid-template-columns:1fr;
  }
  .footer-main{
    grid-template-columns:1fr 1fr;
  }
}

@media (max-width: 768px){
  body{
    font-size:15px;
  }
  .section{
    padding:56px 0;
  }
  .section-head{
    margin-bottom:36px;
  }
  .hero{
    padding:120px 0 64px;
    min-height:auto;
  }
  .hero h1{
    font-size:clamp(2rem,7vw,3rem);
  }
  .hero-actions{
    flex-direction:column;
    align-items:stretch;
    padding:0 12px;
  }
  .hero-actions .btn{
    width:100%;
    justify-content:center;
  }
  .hero-stats{
    flex-wrap:wrap;
  }
  .stat-badge{
    flex:1;
    min-width:100px;
    padding:14px 16px;
  }
  .news-grid{
    grid-template-columns:1fr;
    gap:20px;
  }
  .feature-side{
    grid-template-columns:1fr;
  }
  .feature-content{
    min-height:340px;
    padding:28px;
  }
  .footer-main{
    grid-template-columns:1fr;
    gap:36px;
    padding-bottom:36px;
  }
  .signup-panel{
    padding:28px 20px;
  }
  .signup-points{
    gap:10px;
  }
}

@media (max-width: 520px){
  .container{
    padding:0 16px;
  }
  .header-inner{
    height:64px;
  }
  .brand{
    font-size:17px;
    gap:6px;
  }
  .nav-toggle{
    width:40px;
    height:40px;
    padding:9px;
  }
  .main-nav{
    top:64px;
    padding:20px 16px 24px;
  }
  .hero-eyebrow{
    font-size:12px;
    letter-spacing:2px;
    padding:6px 14px;
    margin-bottom:20px;
  }
  .hero-sub{
    font-size:15px;
    line-height:1.7;
  }
  .stat-badge{
    min-width:calc(50% - 12px);
    flex:1 1 calc(50% - 12px);
  }
  .stat-num{
    font-size:28px;
  }
  .stat-label{
    font-size:12px;
  }
  .btn{
    padding:12px 20px;
    font-size:14px;
  }
  .timeline{
    padding-left:34px;
  }
  .timeline-marker{
    left:-34px;
    width:14px;
    height:14px;
  }
  .timeline::before{
    left:6px;
  }
  .timeline-card{
    padding:18px 16px;
  }
  .timeline-time{
    font-size:24px;
  }
  .price-card{
    padding:28px 22px;
  }
  .feature-accent{
    padding:24px;
  }
  .faq-item summary{
    padding:18px 16px;
    font-size:15px;
  }
  .faq-content{
    padding:0 16px 18px;
  }
  .signup-form-wrap{
    padding:22px 16px;
  }
  .form-input{
    padding:12px 14px;
  }
}

/* roulang page: category1 */
:root {
  --bg-0: #0A0F1F;
  --bg-1: #0B1023;
  --bg-card: #111829;
  --text-1: #F2F5FA;
  --text-2: #A6ADBF;
  --primary: #00F0C8;
  --secondary: #26C6FF;
  --pink: #FF3C6E;
  --amber: #FFB020;
  --border: rgba(255, 255, 255, 0.08);
  --gradient: linear-gradient(135deg, #00F0C8, #26C6FF, #FF3C6E);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 30px -12px rgba(0, 0, 0, 0.8);
  --glow: 0 8px 32px -4px rgba(0, 240, 200, 0.35);
  --spacer: 96px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  background: var(--bg-0);
  color: var(--text-1);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, select, textarea {
  font-family: inherit;
  font-size: 15px;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 15, 31, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header::before {
  content: "";
  display: block;
  height: 3px;
  background: var(--gradient);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

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

.brand-logo {
  font-size: 22px;
  font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}

.brand-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-2);
  letter-spacing: 2px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 8px;
}

.nav-toggle-bar {
  width: 24px;
  height: 2px;
  background: var(--text-1);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 28px;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
  padding: 10px 0;
  position: relative;
  transition: color 0.25s;
}

.nav-link:hover {
  color: var(--text-1);
}

.nav-link.active {
  color: var(--text-1);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--primary);
  box-shadow: 0 0 8px rgba(0, 240, 200, 0.7);
  border-radius: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  padding: 13px 30px;
  border-radius: 10px;
  transition: all 0.25s;
  line-height: 1.4;
}

.btn-primary {
  background: var(--gradient);
  color: #081018;
  box-shadow: 0 4px 18px rgba(0, 240, 200, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 240, 200, 0.35);
  filter: brightness(1.05);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-1);
  border: 1px solid rgba(0, 240, 200, 0.4);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--primary);
  box-shadow: 0 0 20px rgba(0, 240, 200, 0.15);
}

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

.nav-cta {
  padding: 10px 22px;
  font-size: 14px;
}

/* Hero */
.page-hero {
  position: relative;
  padding: 110px 0 90px;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 15, 31, 0.82) 0%, rgba(10, 15, 31, 0.65) 50%, rgba(10, 15, 31, 0.92) 100%);
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 80% 20%, rgba(0, 240, 200, 0.12), transparent 40%),
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: auto, 40px 40px, 40px 40px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 240, 200, 0.1);
  border: 1px solid rgba(0, 240, 200, 0.25);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  letter-spacing: 1px;
  margin-bottom: 24px;
}

.page-hero h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.page-hero .hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-2);
  margin-bottom: 34px;
  max-width: 720px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* Section */
.section {
  padding: var(--spacer) 0;
}

.section-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px;
  box-shadow: var(--shadow);
}

.section-header {
  margin-bottom: 44px;
}

.section-header .section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 2px;
  text-transform: none;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(0, 240, 200, 0.08);
  border: 1px solid rgba(0, 240, 200, 0.2);
  margin-bottom: 14px;
}

.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-2);
  font-size: 16px;
  max-width: 680px;
}

/* Intro */
.intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.intro-content h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}

.intro-content p {
  color: var(--text-2);
  margin-bottom: 18px;
  font-size: 16px;
}

.intro-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 24px;
}

.intro-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
}

.intro-list i {
  color: var(--primary);
  font-size: 17px;
}

.intro-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--glow);
}

.intro-image img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

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

.content-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.content-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 240, 200, 0.4);
  box-shadow: var(--glow);
}

.card-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(10, 15, 31, 0.85) 100%);
}

.card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(10, 15, 31, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(6px);
}

.card-tag.hot {
  background: rgba(255, 60, 110, 0.2);
  border-color: rgba(255, 60, 110, 0.4);
  color: #FF5C82;
}

.card-tag.amber {
  background: rgba(255, 176, 32, 0.18);
  border-color: rgba(255, 176, 32, 0.4);
  color: #FFC45C;
}

.card-body {
  padding: 24px;
}

.card-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.card-body p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 18px;
}

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

.card-link:hover {
  gap: 12px;
}

/* Feature asymmetric */
.feature-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
}

.feature-main {
  background: linear-gradient(145deg, rgba(0, 240, 200, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(0, 240, 200, 0.2);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.feature-main h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 14px;
}

.feature-main > p {
  color: var(--text-2);
  font-size: 15px;
  margin-bottom: 32px;
  max-width: 520px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.data-badge {
  background: var(--gradient);
  color: #081018;
  border-radius: 16px;
  padding: 20px 24px;
  min-width: 130px;
  box-shadow: 0 4px 20px rgba(0, 240, 200, 0.25);
}

.data-badge .num {
  font-size: 32px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 1px;
}

.data-badge .unit {
  font-size: 14px;
  font-weight: 600;
}

.data-badge .label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  margin-top: 6px;
  opacity: 0.75;
}

.feature-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.feature-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  flex: 1;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  border-color: rgba(0, 240, 200, 0.35);
  box-shadow: var(--glow);
}

.feature-card i {
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 14px;
}

.feature-card h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-2);
}

/* Timeline */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 28px;
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--secondary), transparent);
  border-radius: 2px;
}

.timeline-item {
  display: flex;
  gap: 24px;
  padding-left: 36px;
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  border: 4px solid rgba(0, 240, 200, 0.25);
  box-shadow: 0 0 12px rgba(0, 240, 200, 0.5);
}

.timeline-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  width: 100%;
}

.timeline-step {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.timeline-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}

.timeline-card p {
  font-size: 14px;
  color: var(--text-2);
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.3s;
}

.faq-item.open {
  border-color: rgba(0, 240, 200, 0.4);
  box-shadow: var(--glow);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-1);
  text-align: left;
  width: 100%;
  position: relative;
}

.faq-question::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--primary);
  border-radius: 0 4px 4px 0;
  opacity: 0;
  transition: opacity 0.3s;
}

.faq-item.open .faq-question::before {
  opacity: 1;
}

.faq-question i {
  color: var(--primary);
  transition: transform 0.3s;
  flex-shrink: 0;
}

.faq-item.open .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 26px 22px;
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.75;
}

.faq-item.open .faq-answer {
  max-height: 300px;
}

/* CTA */
.cta-section {
  position: relative;
  padding: 100px 0;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 30%, rgba(0, 240, 200, 0.12), transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(255, 60, 110, 0.1), transparent 40%);
}

.cta-card {
  position: relative;
  z-index: 1;
  background: var(--bg-card);
  border: 1px solid rgba(0, 240, 200, 0.25);
  border-radius: var(--radius-lg);
  padding: 60px;
  box-shadow: var(--shadow);
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
}

.cta-card h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 14px;
}

.cta-card > p {
  color: var(--text-2);
  font-size: 16px;
  margin-bottom: 40px;
}

.cta-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  text-align: left;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
}

.form-group input,
.form-group select {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 14px 16px;
  color: var(--text-1);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input::placeholder {
  color: rgba(166, 173, 191, 0.6);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 240, 200, 0.15);
}

.form-group select option {
  background: var(--bg-card);
}

.form-submit {
  grid-column: 1 / -1;
  width: 100%;
  margin-top: 8px;
}

.form-note {
  grid-column: 1 / -1;
  font-size: 13px;
  color: var(--text-2);
  text-align: center;
  margin-top: 4px;
}

/* Footer */
.site-footer {
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  position: relative;
}

.site-footer::before {
  content: "";
  display: block;
  height: 3px;
  background: var(--gradient);
}

.footer-main {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr;
  gap: 48px;
  padding: 56px 0 40px;
}

.footer-brand .brand {
  margin-bottom: 18px;
}

.footer-brand p {
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 360px;
}

.footer-socials {
  display: flex;
  gap: 14px;
}

.footer-socials a {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 17px;
  transition: all 0.25s;
}

.footer-socials a:hover {
  color: var(--primary);
  border-color: var(--primary);
  box-shadow: var(--glow);
}

.footer-links h4,
.footer-contact h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-links ul,
.footer-contact ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a,
.footer-contact li {
  color: var(--text-2);
  font-size: 14px;
  transition: color 0.2s;
}

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

.footer-contact i {
  width: 20px;
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 22px 0;
  text-align: center;
  color: var(--text-2);
  font-size: 13px;
}

/* Responsive */
@media (max-width: 1024px) {
  :root {
    --spacer: 72px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 79px;
    left: 0;
    right: 0;
    background: rgba(10, 15, 31, 0.98);
    flex-direction: column;
    align-items: flex-start;
    padding: 28px 24px 36px;
    gap: 24px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.35s, opacity 0.35s, visibility 0.35s;
    border-bottom: 1px solid var(--border);
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    gap: 6px;
    width: 100%;
  }

  .nav-link {
    font-size: 18px;
    padding: 12px 0;
    display: block;
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-link.active {
    color: var(--primary);
  }

  .nav-link.active::after {
    display: none;
  }

  .nav-cta {
    width: 100%;
  }

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

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

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

@media (max-width: 768px) {
  :root {
    --spacer: 56px;
  }

  .container {
    padding: 0 18px;
  }

  .section-card {
    padding: 32px 22px;
  }

  .page-hero {
    padding: 80px 0 70px;
  }

  .page-hero h1 {
    font-size: 2.2rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

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

  .footer-main {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .cta-card {
    padding: 36px 22px;
  }

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

  .form-group.full {
    grid-column: auto;
  }

  .timeline {
    padding-left: 14px;
  }

  .timeline-item {
    padding-left: 28px;
  }

  .feature-main {
    padding: 28px 22px;
  }

  .badge-row {
    flex-direction: column;
  }

  .data-badge {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .header-inner {
    height: 68px;
  }

  .brand-logo {
    font-size: 20px;
  }

  .brand-name {
    font-size: 14px;
  }

  .page-hero h1 {
    font-size: 1.8rem;
  }

  .page-hero .hero-desc {
    font-size: 15px;
  }

  .btn {
    min-height: 44px;
    padding: 12px 20px;
  }

  .form-group input,
  .form-group select {
    width: 100%;
  }

  .footer-contact li {
    word-break: break-all;
  }
}

/* roulang page: article */
:root {
    --bg-primary: #0A0F1F;
    --bg-secondary: #0B1023;
    --bg-card: #111829;
    --bg-input: rgba(0,0,0,0.3);
    --text-primary: #F2F5FA;
    --text-secondary: #A6ADBF;
    --text-muted: #6B7488;
    --accent-primary: #00F0C8;
    --accent-secondary: #FF3C6E;
    --accent-tertiary: #FFB020;
    --gradient-brand: linear-gradient(135deg, #00F0C8, #26C6FF, #FF3C6E);
    --gradient-hot: linear-gradient(135deg, #FF3C6E, #FFB020);
    --border-color: rgba(255,255,255,0.08);
    --radius-card: 16px;
    --radius-block: 22px;
    --radius-btn: 10px;
    --radius-badge: 999px;
    --shadow-card: 0 12px 30px -12px rgba(0,0,0,0.8);
    --shadow-hover: 0 8px 32px -4px rgba(0,240,200,0.35);
    --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
    --font-num: "DIN Alternate", "Segoe UI", "PingFang SC", sans-serif;
    --header-h: 78px;
    --space-section: 96px;
    --space-section-md: 64px;
    --space-section-sm: 42px;
    --container-max: 1240px;
}
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-h) + 16px);
}
body {
    font-family: var(--font-cn);
    font-size: 15px;
    line-height: 1.75;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: linear-gradient(rgba(0,240,200,0.03) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(0,240,200,0.03) 1px, transparent 1px);
    background-size: 72px 72px;
    pointer-events: none;
    z-index: 0;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color .25s ease, border-color .25s ease, background .25s ease, box-shadow .25s ease, transform .25s ease;
}
ul,
ol {
    list-style: none;
}
button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
}
input,
textarea,
select {
    font-family: inherit;
}
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    background: rgba(10,15,31,0.9);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border-color);
}
.site-header::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 3px;
    background: var(--gradient-brand);
    opacity: .85;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    position: relative;
    z-index: 2;
}
.brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 800;
    letter-spacing: 1px;
}
.brand-logo {
    font-size: 1.35rem;
    color: var(--accent-primary);
    text-shadow: 0 0 18px rgba(0,240,200,0.5);
}
.brand-name {
    font-size: 1.05rem;
    color: var(--text-primary);
}
.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-radius: 8px;
    transition: background .25s, box-shadow .25s;
}
.nav-toggle:hover {
    background: rgba(255,255,255,0.06);
    box-shadow: 0 0 20px rgba(0,240,200,0.2);
}
.nav-toggle-bar {
    display: block;
    width: 22px;
    height: 2px;
    border-radius: 2px;
    background: var(--text-primary);
    transition: transform .3s, opacity .3s;
}
.nav-toggle.active .nav-toggle-bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.nav-toggle.active .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active .nav-toggle-bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 24px;
}
.nav-list {
    display: flex;
    align-items: center;
    gap: 28px;
}
.nav-link {
    position: relative;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 2px;
    transition: color .25s, text-shadow .25s;
}
.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: var(--accent-primary);
    box-shadow: 0 0 12px rgba(0,240,200,0.8);
    opacity: 0;
    transform: scaleX(0);
    transition: opacity .3s, transform .3s;
}
.nav-link:hover {
    color: var(--text-primary);
    text-shadow: 0 0 12px rgba(0,240,200,0.35);
}
.nav-link.active {
    color: var(--text-primary);
    font-weight: 600;
    text-shadow: 0 0 14px rgba(0,240,200,0.4);
}
.nav-link.active::after {
    opacity: 1;
    transform: scaleX(1);
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 600;
    line-height: 1;
    padding: 14px 32px;
    border-radius: var(--radius-btn);
    transition: transform .25s, box-shadow .25s, background .25s, border-color .25s, opacity .25s;
    cursor: pointer;
    white-space: nowrap;
    text-align: center;
}
.btn:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 3px;
}
.btn-primary {
    background: var(--gradient-brand);
    color: #0A0F1F;
    box-shadow: 0 8px 28px -6px rgba(0,240,200,0.4);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 36px -4px rgba(0,240,200,0.55);
}
.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 4px 18px -4px rgba(0,240,200,0.4);
}
.btn-outline {
    position: relative;
    background: rgba(10,15,31,0.6);
    color: var(--text-primary);
    border: 1px solid rgba(0,240,200,0.4);
}
.btn-outline:hover {
    background: rgba(255,255,255,0.07);
    box-shadow: 0 0 24px rgba(0,240,200,0.25);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}
.btn-outline:active {
    transform: translateY(0);
}
.nav-cta {
    padding: 10px 22px;
    font-size: 14px;
}
.site-main {
    position: relative;
    z-index: 1;
}
.article-hero {
    position: relative;
    padding: 72px 0 60px;
    background: linear-gradient(to right, rgba(10,15,31,0.96), rgba(11,16,35,0.82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
}
.article-hero::after {
    content: '';
    position: absolute;
    top: -80px;
    right: -80px;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0,240,200,0.1), transparent 70%);
    pointer-events: none;
}
.article-hero .container {
    position: relative;
    z-index: 1;
}
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}
.breadcrumb a {
    color: var(--text-secondary);
    transition: color .25s;
}
.breadcrumb a:hover {
    color: var(--accent-primary);
}
.breadcrumb-sep {
    color: var(--text-muted);
    font-size: 12px;
}
.breadcrumb-current {
    color: var(--text-primary);
    max-width: 360px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.article-heading {
    max-width: 880px;
}
.article-category-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: var(--radius-badge);
    background: rgba(0,240,200,0.12);
    border: 1px solid rgba(0,240,200,0.3);
    color: var(--accent-primary);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 18px;
}
.article-heading h1 {
    font-size: clamp(2.1rem, 4.2vw, 3.2rem);
    font-weight: 900;
    line-height: 1.25;
    letter-spacing: 1px;
    color: var(--text-primary);
    text-shadow: 0 4px 30px rgba(0,0,0,0.5);
    margin-bottom: 24px;
}
.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 14px;
    color: var(--text-secondary);
}
.article-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.article-meta-item i {
    color: var(--accent-primary);
    font-size: 14px;
}
.article-content-section {
    padding: var(--space-section) 0;
}
.article-body-content {
    max-width: 860px;
    margin: 0 auto;
}
.article-body {
    color: rgba(242,245,250,0.92);
    font-size: 16px;
    line-height: 1.8;
}
.article-body p {
    margin-bottom: 22px;
}
.article-body h2 {
    font-size: 1.55rem;
    font-weight: 800;
    margin: 44px 0 20px;
    padding-left: 16px;
    border-left: 4px solid var(--accent-primary);
    line-height: 1.4;
    color: var(--text-primary);
}
.article-body h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 36px 0 16px;
    color: var(--text-primary);
    line-height: 1.45;
}
.article-body h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 28px 0 12px;
    color: var(--text-primary);
}
.article-body ul,
.article-body ol {
    margin-bottom: 22px;
    padding-left: 4px;
}
.article-body ul li,
.article-body ol li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 10px;
}
.article-body ul li::before {
    content: '';
    position: absolute;
    left: 2px;
    top: 12px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gradient-brand);
    box-shadow: 0 0 8px rgba(0,240,200,0.5);
}
.article-body ol {
    counter-reset: articleOl;
}
.article-body ol li {
    counter-increment: articleOl;
}
.article-body ol li::before {
    content: counter(articleOl) ".";
    position: absolute;
    left: 0;
    top: 0;
    font-weight: 800;
    font-family: var(--font-num);
    color: var(--accent-primary);
}
.article-body a {
    color: var(--accent-primary);
    border-bottom: 1px solid rgba(0,240,200,0.35);
    transition: border-color .25s, box-shadow .25s;
}
.article-body a:hover {
    border-bottom-color: var(--accent-primary);
    box-shadow: 0 2px 12px rgba(0,240,200,0.2);
}
.article-body blockquote {
    margin: 30px 0;
    padding: 20px 26px;
    background: rgba(0,240,200,0.05);
    border-left: 4px solid var(--accent-primary);
    border-radius: 0 var(--radius-card) var(--radius-card) 0;
    color: var(--text-secondary);
    font-style: normal;
}
.article-body blockquote p {
    margin-bottom: 0;
}
.article-body pre {
    background: #0D1428;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 20px 24px;
    overflow-x: auto;
    margin-bottom: 24px;
    font-size: 14px;
    line-height: 1.7;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    color: #B8E6DF;
}
.article-body code {
    background: rgba(0,240,200,0.1);
    color: #7CF5D9;
    padding: 2px 6px;
    border-radius: 6px;
    font-size: .9em;
    font-family: "SFMono-Regular", Consolas, monospace;
}
.article-body pre code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
}
.article-body img {
    border-radius: var(--radius-card);
    border: 1px solid var(--border-color);
    margin: 28px 0;
    box-shadow: var(--shadow-card);
}
.article-body hr {
    border: none;
    height: 1px;
    background: var(--gradient-brand);
    opacity: .4;
    margin: 40px 0;
}
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 28px 0;
    font-size: 14px;
}
.article-body th,
.article-body td {
    border: 1px solid var(--border-color);
    padding: 14px 18px;
    text-align: left;
}
.article-body th {
    background: rgba(0,240,200,0.08);
    color: var(--accent-primary);
    font-weight: 700;
}
.article-not-found {
    text-align: center;
    padding: 60px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-block);
    box-shadow: var(--shadow-card);
}
.article-not-found p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}
.article-related {
    padding-bottom: var(--space-section);
}
.section-heading {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}
.section-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    border-radius: var(--radius-badge);
    background: rgba(0,240,200,0.1);
    border: 1px solid rgba(0,240,200,0.25);
    color: var(--accent-primary);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    white-space: nowrap;
}
.section-heading h2 {
    font-size: clamp(1.4rem, 2.6vw, 2rem);
    font-weight: 800;
    color: var(--text-primary);
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.related-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: transform .3s, box-shadow .3s, border-color .3s;
}
.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(0,240,200,0.3);
}
.related-card-img {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}
.related-card-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10,15,31,0.65), transparent 45%);
}
.related-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .4s ease;
}
.related-card:hover .related-card-img img {
    transform: scale(1.04);
}
.related-card-body {
    padding: 22px 22px 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.related-card-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.4;
}
.related-card-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 18px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-primary);
    transition: gap .25s;
}
.related-card-link i {
    font-size: 12px;
    transition: transform .25s;
}
.related-card:hover .related-card-link i {
    transform: translateX(4px);
}
.article-cta {
    padding-bottom: var(--space-section);
}
.cta-panel {
    position: relative;
    padding: 64px 56px;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(0,240,200,0.1), rgba(255,60,110,0.07)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
    border: 1px solid rgba(0,240,200,0.2);
    box-shadow: 0 20px 50px -12px rgba(0,0,0,0.7), 0 0 60px rgba(0,240,200,0.05);
    text-align: center;
    overflow: hidden;
}
.cta-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 3px;
    background: var(--gradient-brand);
    border-radius: 0 0 8px 8px;
}
.cta-panel h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
}
.cta-panel p {
    font-size: 15px;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 32px;
    line-height: 1.8;
}
.cta-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}
.site-footer {
    position: relative;
    z-index: 1;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}
.site-footer::before {
    content: '';
    display: block;
    height: 3px;
    background: var(--gradient-brand);
    opacity: .7;
}
.footer-main {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 48px;
    padding: 64px 0 40px;
}
.footer-brand .brand {
    margin-bottom: 16px;
}
.footer-brand p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 340px;
    margin-bottom: 20px;
}
.footer-socials {
    display: flex;
    gap: 12px;
}
.footer-socials a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 16px;
    transition: all .25s ease;
}
.footer-socials a:hover {
    color: var(--accent-primary);
    border-color: rgba(0,240,200,0.4);
    background: rgba(0,240,200,0.08);
    transform: translateY(-2px);
}
.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 8px;
}
.footer-links h4::after,
.footer-contact h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 28px;
    height: 2px;
    background: var(--accent-primary);
    border-radius: 2px;
}
.footer-links li,
.footer-contact li {
    margin-bottom: 12px;
}
.footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color .25s, padding-left .25s;
}
.footer-links a:hover {
    color: var(--accent-primary);
    padding-left: 4px;
}
.footer-contact li {
    font-size: 14px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}
.footer-contact i {
    color: var(--accent-primary);
    font-size: 13px;
    width: 16px;
    text-align: center;
}
.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    text-align: center;
}
.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}
@media (max-width: 1024px) {
    :root {
        --space-section: var(--space-section-md);
    }
    .nav-toggle {
        display: flex;
    }
    .main-nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        height: calc(100vh - var(--header-h));
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        gap: 0;
        background: rgba(10,15,31,0.98);
        padding: 28px 24px 40px;
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        transition: opacity .35s ease, transform .35s ease, visibility .35s;
        overflow-y: auto;
        backdrop-filter: blur(20px);
        border-bottom: 3px solid transparent;
    }
    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        border-bottom-color: rgba(0,240,200,0.5);
    }
    .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        margin-bottom: 28px;
    }
    .nav-link {
        font-size: 18px;
        padding: 14px 10px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
        display: block;
    }
    .nav-link::after {
        display: none;
    }
    .nav-link.active {
        color: var(--accent-primary);
        background: rgba(0,240,200,0.06);
        border-radius: 10px;
        box-shadow: inset 3px 0 0 var(--accent-primary);
    }
    .nav-cta {
        width: 100%;
        padding: 14px 22px;
    }
    .related-grid {
        gap: 18px;
    }
}
@media (max-width: 768px) {
    :root {
        --space-section: var(--space-section-sm);
    }
    .article-hero {
        padding: 48px 0 40px;
    }
    .article-heading h1 {
        font-size: clamp(1.7rem, 3.6vw, 2.2rem);
    }
    .article-meta {
        gap: 14px;
    }
    .article-body {
        font-size: 15px;
    }
    .article-body-content {
        padding: 0 4px;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .cta-panel {
        padding: 44px 22px;
    }
    .footer-main {
        grid-template-columns: 1fr;
        gap: 36px;
        padding-top: 48px;
    }
    .cta-actions {
        flex-direction: column;
        width: 100%;
    }
    .cta-actions .btn {
        width: 100%;
    }
}
@media (max-width: 520px) {
    .container {
        padding: 0 18px;
    }
    .brand-logo {
        font-size: 1.15rem;
    }
    .brand-name {
        font-size: .95rem;
    }
    .nav-toggle {
        width: 40px;
        height: 40px;
    }
    .btn {
        min-height: 44px;
        padding: 13px 22px;
        font-size: 15px;
    }
    .article-meta {
        font-size: 13px;
    }
    .breadcrumb {
        font-size: 12px;
        gap: 6px;
    }
    .article-body pre {
        padding: 14px 16px;
        font-size: 13px;
    }
    .related-card-body {
        padding: 18px 16px 20px;
    }
}