/* roulang page: index */
:root{
  --brand:#FF6B2C;
  --brand-2:#FF7A1A;
  --cyan:#22D3EE;
  --cyan-soft:rgba(34,211,238,.18);
  --magenta:#E45CFF;
  --bg:#0C0F14;
  --panel:#141A22;
  --panel-2:#1A222C;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --text:#EAF0F6;
  --muted:#9AA6B2;
  --light:#F7F8FA;
  --white:#FFFFFF;
  --ink:#1B1F26;
  --ink-muted:#5B6472;
  --line-light:#E6E9EF;
  --radius:16px;
  --radius-sm:11px;
  --radius-lg:20px;
  --shadow-dark:0 12px 30px rgba(0,0,0,.35);
  --shadow-light:0 8px 24px rgba(15,23,42,.08);
  --container:1240px;
  --gap:24px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.9;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color .22s ease,border-color .22s ease,opacity .22s ease;}
a:hover{color:var(--brand);}
button,input{font-family:inherit;font-size:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{line-height:1.28;font-weight:800;letter-spacing:.2px;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
::selection{background:rgba(255,107,44,.35);color:#fff;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:clamp(52px,6.4vw,104px) 0;position:relative;}
.section-dark{background:var(--bg);}
.section-panel{background:var(--panel);}
.section-light{background:var(--light);color:var(--ink);}
.section-light .section-sub{color:var(--ink-muted);}
.section-light h2{color:var(--ink);}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:1.4px;
  color:var(--cyan);text-transform:uppercase;
  padding:6px 14px;border:1px solid rgba(34,211,238,.35);
  border-radius:999px;background:rgba(34,211,238,.07);
}
.section-head{max-width:820px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
h2{font-size:clamp(26px,3.2vw,38px);margin:16px 0 14px;}
.section-sub{font-size:17px;color:var(--muted);line-height:1.9;}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:50px;padding:0 26px;border-radius:var(--radius-sm);
  font-size:16px;font-weight:700;line-height:1;cursor:pointer;
  border:1px solid transparent;white-space:nowrap;
  transition:transform .2s ease,box-shadow .25s ease,background .25s ease,color .25s ease,border-color .25s ease;
}
.btn-primary{background:linear-gradient(135deg,var(--brand-2),var(--brand));color:#12161C;box-shadow:0 10px 26px rgba(255,107,44,.28);}
.btn-primary:hover{color:#12161C;transform:translateY(-2px);box-shadow:0 14px 34px rgba(255,107,44,.42);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--cyan);border-color:rgba(34,211,238,.55);}
.btn-ghost:hover{color:#0C0F14;background:var(--cyan);border-color:var(--cyan);box-shadow:0 0 24px rgba(34,211,238,.35);}
.btn-light{background:#fff;color:var(--ink);border-color:var(--line-light);box-shadow:var(--shadow-light);}
.btn-light:hover{color:var(--brand);transform:translateY(-2px);}
.btn-sm{min-height:42px;padding:0 18px;font-size:15px;border-radius:10px;}

/* ============ HEADER ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(12,15,20,.93);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.75),rgba(255,107,44,.6),transparent);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px;}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;flex-shrink:0;
  background:linear-gradient(140deg,var(--brand-2),var(--brand));
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 20px rgba(255,107,44,.4);
}
.brand-mark::after{
  content:"";width:0;height:0;margin-left:3px;
  border-left:9px solid #12161C;border-top:6px solid transparent;border-bottom:6px solid transparent;
}
.brand-text{font-size:19px;font-weight:800;letter-spacing:.5px;color:var(--text);white-space:nowrap;}
.brand:hover .brand-text{color:var(--brand);}
.nav-wrap{display:flex;align-items:center;gap:26px;}
.main-nav{display:flex;align-items:center;gap:4px;}
.main-nav a{
  position:relative;display:block;padding:10px 14px;font-size:15.5px;font-weight:600;
  color:var(--muted);border-radius:9px;
}
.main-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--brand));
  transform:scaleX(0);transform-origin:left;transition:transform .26s ease;
}
.main-nav a:hover{color:var(--text);background:rgba(255,255,255,.04);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--cyan);background:rgba(34,211,238,.09);}
.main-nav a.active::after{transform:scaleX(1);}
.header-cta{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:11px;background:rgba(255,255,255,.05);
  border:1px solid var(--line-strong);cursor:pointer;padding:0;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:19px;height:2px;background:var(--text);border-radius:2px;transition:.25s;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ HERO ============ */
.hero{
  position:relative;overflow:hidden;
  min-height:min(82vh,760px);
  display:flex;align-items:center;
  padding:clamp(56px,7vw,96px) 0;
  background-image:
    linear-gradient(100deg,rgba(12,15,20,.96) 0%,rgba(12,15,20,.86) 42%,rgba(12,15,20,.5) 72%,rgba(12,15,20,.72) 100%),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse at 30% 40%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 30% 40%,#000 20%,transparent 78%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;gap:56px;align-items:center;width:100%;}
.hero h1{
  font-size:clamp(32px,4.4vw,58px);
  margin:20px 0 20px;letter-spacing:-.4px;
}
.hero h1 em{font-style:normal;color:var(--brand);}
.hero-sub{font-size:clamp(16px,1.2vw,18px);color:#C4CEDA;max-width:600px;line-height:1.95;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-facts{display:flex;flex-wrap:wrap;gap:34px;margin-top:44px;padding-top:26px;border-top:1px solid var(--line);}
.hero-facts .fact strong{display:block;font-size:26px;font-weight:800;color:var(--cyan);font-variant-numeric:tabular-nums;line-height:1.3;}
.hero-facts .fact span{font-size:14px;color:var(--muted);}
.hero-visual{position:relative;}
.hero-card{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid rgba(34,211,238,.35);
  box-shadow:0 0 0 1px rgba(255,107,44,.12),0 26px 60px rgba(0,0,0,.55);
  background:var(--panel);
  transform:perspective(1200px) rotateY(-6deg) rotateX(2deg);
}
.hero-card img{width:100%;height:320px;object-fit:cover;}
.hero-card-body{padding:20px 22px 24px;}
.hero-card-body h3{font-size:19px;margin-bottom:8px;}
.hero-card-body p{font-size:15px;color:var(--muted);line-height:1.8;}
.hero-tag{
  position:absolute;top:16px;left:16px;z-index:3;
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 13px;border-radius:999px;font-size:13px;font-weight:700;
  background:rgba(12,15,20,.82);color:var(--cyan);border:1px solid rgba(34,211,238,.45);
  backdrop-filter:blur(8px);
}
.hero-tag i{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand);}

/* ============ PAIN ============ */
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);}
.pain-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px 26px;position:relative;overflow:hidden;
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.pain-card::before{
  content:"";position:absolute;left:0;top:0;width:3px;height:0;background:linear-gradient(180deg,var(--brand),var(--cyan));
  transition:height .3s ease;
}
.pain-card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.4);box-shadow:var(--shadow-dark);}
.pain-card:hover::before{height:100%;}
.pain-num{
  font-size:14px;font-weight:800;letter-spacing:1px;color:var(--brand);
  font-variant-numeric:tabular-nums;margin-bottom:14px;display:block;
}
.pain-card h3{font-size:19px;margin-bottom:12px;}
.pain-card p{font-size:15.5px;color:var(--muted);line-height:1.85;}

/* ============ SOLUTION ============ */
.solution-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:38px 0;
}
.solution-row + .solution-row{border-top:1px solid var(--line);}
.solution-row.reverse .solution-media{order:2;}
.solution-media{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);}
.solution-media img{width:100%;height:300px;object-fit:cover;transition:transform .5s ease;}
.solution-media:hover img{transform:scale(1.045);}
.solution-text h3{font-size:clamp(20px,2vw,25px);margin-bottom:16px;}
.solution-text p{color:var(--muted);font-size:16px;line-height:1.9;}
.solution-list{margin-top:20px;display:grid;gap:12px;}
.solution-list li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:#C4CEDA;}
.solution-list li::before{
  content:"";flex-shrink:0;width:18px;height:18px;margin-top:7px;border-radius:6px;
  background:linear-gradient(135deg,var(--cyan),rgba(34,211,238,.25));
  box-shadow:0 0 12px rgba(34,211,238,.35);
}

/* ============ CATEGORY ============ */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);}
.cat-card{
  display:flex;flex-direction:column;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.cat-card:hover{transform:translateY(-4px);border-color:rgba(255,107,44,.5);box-shadow:var(--shadow-dark);}
.cat-thumb{position:relative;overflow:hidden;}
.cat-thumb img{width:100%;height:158px;object-fit:cover;transition:transform .5s ease;}
.cat-card:hover .cat-thumb img{transform:scale(1.06);}
.cat-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(12,15,20,.05),rgba(12,15,20,.72));}
.cat-body{padding:20px 22px 26px;display:flex;flex-direction:column;flex:1;}
.cat-body h3{font-size:19px;margin-bottom:10px;}
.cat-card:hover .cat-body h3{color:var(--brand);}
.cat-body p{font-size:15px;color:var(--muted);line-height:1.85;flex:1;}
.cat-link{margin-top:18px;font-size:15px;font-weight:700;color:var(--cyan);display:inline-flex;align-items:center;gap:8px;}
.cat-card:hover .cat-link{color:var(--brand);}

/* ============ STATS ============ */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);}
.stat-card{
  background:#fff;border:1px solid var(--line-light);border-radius:var(--radius);
  padding:32px 26px;box-shadow:var(--shadow-light);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.stat-card:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(15,23,42,.13);border-color:rgba(255,107,44,.4);}
.stat-card strong{
  display:block;font-size:clamp(30px,3.4vw,42px);font-weight:800;color:var(--brand);
  font-variant-numeric:tabular-nums;line-height:1.2;letter-spacing:-.5px;
}
.stat-card span{display:block;margin-top:10px;font-size:15px;color:var(--ink-muted);line-height:1.8;}

/* ============ TESTIMONIAL ============ */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);}
.quote-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 28px;position:relative;
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.quote-card:hover{transform:translateY(-4px);border-color:rgba(228,92,255,.4);box-shadow:var(--shadow-dark);}
.quote-mark{font-size:44px;line-height:1;color:rgba(228,92,255,.5);font-weight:800;margin-bottom:10px;}
.quote-card h3{font-size:17px;color:var(--cyan);margin-bottom:12px;}
.quote-card p{font-size:15.5px;color:#C4CEDA;line-height:1.9;}
.quote-author{display:flex;align-items:center;gap:12px;margin-top:22px;padding-top:18px;border-top:1px solid var(--line);}
.quote-author img{width:42px;height:42px;border-radius:50%;object-fit:cover;border:1px solid var(--line-strong);}
.quote-author b{display:block;font-size:15px;font-weight:700;}
.quote-author em{font-style:normal;font-size:13.5px;color:var(--muted);}

/* ============ NEWS ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);}
.news-card{
  display:flex;flex-direction:column;background:var(--panel);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.42);box-shadow:var(--shadow-dark);}
.news-thumb{display:block;overflow:hidden;}
.news-thumb img{width:100%;height:176px;object-fit:cover;transition:transform .5s ease;}
.news-card:hover .news-thumb img{transform:scale(1.05);}
.news-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1;}
.news-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px;}
.badge{
  display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;
  font-size:12.5px;font-weight:700;line-height:1.7;letter-spacing:.3px;
}
.badge-cat{background:rgba(34,211,238,.13);color:var(--cyan);border:1px solid rgba(34,211,238,.3);}
.badge-time{background:rgba(255,255,255,.05);color:var(--muted);border:1px solid var(--line);font-variant-numeric:tabular-nums;}
.news-title{font-size:18px;line-height:1.55;margin-bottom:10px;}
.news-title a{color:var(--text);}
.news-card:hover .news-title a{color:var(--brand);}
.news-excerpt{
  font-size:15px;color:var(--muted);line-height:1.85;flex:1;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-more{margin-top:16px;font-size:14.5px;font-weight:700;color:var(--cyan);display:inline-flex;align-items:center;gap:7px;}
.news-more:hover{color:var(--brand);}
.empty-state{
  border:1px dashed var(--line-strong);border-radius:var(--radius);
  padding:52px 28px;text-align:center;background:rgba(255,255,255,.02);
}
.empty-state .empty-icon{
  width:52px;height:52px;margin:0 auto 18px;border-radius:14px;
  background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.35);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;color:var(--cyan);
}
.empty-state p{color:var(--muted);font-size:16px;margin-bottom:22px;}

/* ============ FAQ ============ */
.faq-list{max-width:900px;margin:0 auto;}
.faq-list .accordion{border:none;background:transparent;}
.faq-list .accordion-item{
  background:#fff;border:1px solid var(--line-light);border-radius:var(--radius-sm);
  margin-bottom:14px;overflow:hidden;box-shadow:var(--shadow-light);
  transition:border-color .25s ease;
}
.faq-list .accordion-item.is-active{border-color:rgba(255,107,44,.45);}
.faq-list .accordion-title{
  display:block;padding:20px 56px 20px 24px;font-size:17px;font-weight:700;color:var(--ink);
  position:relative;border:none;background:transparent;line-height:1.6;
}
.faq-list .accordion-title::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--brand),var(--cyan));
  transform:scaleY(0);transform-origin:top;transition:transform .28s ease;
}
.faq-list .accordion-item.is-active .accordion-title::before{transform:scaleY(1);}
.faq-list .accordion-title:hover{color:var(--brand);}
.faq-list .accordion-title::after{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:700;color:var(--brand);line-height:1;
}
.faq-list .accordion-item.is-active .accordion-title::after{content:"–";color:var(--cyan);}
.faq-list .accordion-content{padding:0 24px 22px;border:none !important;background:transparent !important;color:var(--ink-muted);}
.faq-list .accordion-content p{font-size:15.5px;line-height:1.9;color:var(--ink-muted);}

/* ============ CTA ============ */
.final-cta{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  padding:clamp(40px,5vw,68px) clamp(26px,4vw,64px);
  background-image:linear-gradient(110deg,rgba(12,15,20,.94),rgba(12,15,20,.72)),url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
  border:1px solid rgba(34,211,238,.28);
  display:grid;grid-template-columns:1.3fr .7fr;gap:40px;align-items:center;
}
.final-cta h2{margin:14px 0 14px;font-size:clamp(24px,3vw,36px);}
.final-cta p{color:#C4CEDA;font-size:16.5px;line-height:1.9;}
.final-cta .cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.cta-side{display:grid;gap:14px;}
.cta-side .mini{
  background:rgba(20,26,34,.85);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:16px 20px;font-size:15px;color:#C4CEDA;display:flex;align-items:center;gap:12px;
}
.cta-side .mini b{color:var(--cyan);font-weight:800;font-variant-numeric:tabular-nums;}

/* ============ FOOTER ============ */
.site-footer{
  position:relative;background:#0A0D12;border-top:1px solid var(--line);padding:64px 0 0;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.8),rgba(255,107,44,.6),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:15px;color:var(--muted);line-height:1.9;max-width:340px;}
.footer-col h4{font-size:16px;margin-bottom:18px;color:var(--text);}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{font-size:15px;color:var(--muted);display:inline-block;}
.footer-col a:hover{color:var(--cyan);transform:translateX(2px);}
.footer-note{font-size:15px;color:var(--muted);line-height:1.9;}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 30px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:14px;color:#7C8794;
}
.footer-bottom a{color:#7C8794;}
.footer-bottom a:hover{color:var(--cyan);}

/* ============ RESPONSIVE ============ */
@media (max-width:1199px){
  .hero-grid{gap:40px;}
  .pain-grid,.cat-grid,.stat-grid{grid-template-columns:repeat(2,1fr);}
  .news-grid,.quote-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;}
  .footer-col:last-child{grid-column:1 / -1;}
}
@media (max-width:1023px){
  .nav-toggle{display:flex;}
  .nav-wrap{
    position:fixed;left:0;right:0;top:72px;bottom:auto;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(10,13,18,.98);border-bottom:1px solid var(--line);
    padding:14px 20px 26px;
    max-height:0;overflow:hidden;opacity:0;pointer-events:none;
    transition:max-height .34s ease,opacity .28s ease,padding .3s ease;
  }
  .nav-wrap.is-open{max-height:78vh;overflow-y:auto;opacity:1;pointer-events:auto;}
  .main-nav{flex-direction:column;align-items:stretch;gap:2px;width:100%;}
  .main-nav a{padding:15px 14px;font-size:16.5px;min-height:48px;display:flex;align-items:center;border-radius:10px;}
  .main-nav a::after{left:14px;right:auto;width:26px;bottom:9px;}
  .main-nav a.active{background:rgba(34,211,238,.1);box-shadow:inset 3px 0 0 var(--cyan);}
  .header-cta{width:100%;margin-top:16px;}
  .header-cta .btn{width:100%;}
  .hero{min-height:auto;padding:56px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:38px;}
  .hero-card{transform:none;max-width:560px;}
  .hero-card img{height:262px;}
  .solution-row{grid-template-columns:1fr;gap:28px;padding:30px 0;}
  .solution-row.reverse .solution-media{order:0;}
  .solution-media img{height:238px;}
  .final-cta{grid-template-columns:1fr;gap:28px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .header-inner{min-height:64px;}
  .nav-wrap{top:64px;}
  .brand-text{font-size:17px;}
  .hero h1{margin:16px 0 16px;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{flex:1 1 100%;}
  .hero-facts{gap:22px 30px;margin-top:32px;}
  .hero-facts .fact strong{font-size:22px;}
  .pain-grid,.cat-grid,.stat-grid,.news-grid,.quote-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-col:last-child{grid-column:auto;}
  .final-cta{padding:36px 22px;}
  .final-cta .cta-actions .btn{flex:1 1 100%;}
  .section-head{margin-bottom:32px;}
  .faq-list .accordion-title{padding:17px 48px 17px 18px;font-size:16px;}
  .faq-list .accordion-content{padding:0 18px 20px;}
}
@media (max-width:520px){
  .hero-card img{height:210px;}
  .cat-thumb img,.news-thumb img{height:172px;}
  .solution-media img{height:200px;}
  .stat-card{padding:24px 20px;}
  .quote-card{padding:24px 20px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: article */
:root{
  --c-bg:#0C0F14;
  --c-panel:#141A22;
  --c-panel-2:#1B2230;
  --c-line:rgba(255,255,255,.08);
  --c-orange:#FF6B2C;
  --c-orange-2:#FF7A1A;
  --c-cyan:#22D3EE;
  --c-magenta:#E879F9;
  --paper:#F7F8FA;
  --paper-2:#FFFFFF;
  --ink:#1B1F26;
  --ink-2:#5B6472;
  --line-light:#E6E9EF;
  --dk-text:#EAF0F6;
  --dk-muted:#9AA6B2;
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --sh-dark:0 12px 30px rgba(0,0,0,.35);
  --sh-light:0 8px 24px rgba(15,23,42,.08);
  --max:1200px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.9;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
body.nav-lock{overflow:hidden;}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;line-height:1.28;font-weight:800;letter-spacing:.2px;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-cyan);outline-offset:2px;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(12,15,20,.94);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,rgba(34,211,238,0),rgba(34,211,238,.75),rgba(255,107,44,.55),rgba(34,211,238,0));
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:18px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--dk-text);font-weight:800;font-size:18px;letter-spacing:.5px;}
.brand-mark{
  width:26px;height:26px;border-radius:8px;flex:none;
  background:linear-gradient(135deg,var(--c-orange-2),var(--c-cyan));
  box-shadow:0 0 0 1px rgba(255,255,255,.12),0 0 18px rgba(34,211,238,.35);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:9px;border-radius:3px;background:rgba(12,15,20,.85);
}
.brand-text{white-space:nowrap;}
.nav-wrap{display:flex;align-items:center;gap:26px;}
.main-nav{display:flex;align-items:center;gap:6px;}
.main-nav a{
  position:relative;display:inline-block;
  padding:10px 14px;border-radius:10px;
  color:#C6D0DB;font-size:15.5px;font-weight:500;
  transition:color .18s ease,background-color .18s ease;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.05);}
.main-nav a.active{color:#fff;}
.main-nav a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--c-cyan),var(--c-orange));
  box-shadow:0 0 12px rgba(34,211,238,.7);
}
.header-cta{display:flex;align-items:center;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--r-btn);
  padding:12px 22px;font-size:15.5px;font-weight:700;letter-spacing:.3px;
  transition:transform .16s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn-sm{padding:9px 16px;font-size:14.5px;}
.btn-primary{
  background:linear-gradient(135deg,var(--c-orange-2),var(--c-orange));
  color:#12161C;
  box-shadow:0 8px 22px rgba(255,107,44,.28);
}
.btn-primary:hover{box-shadow:0 10px 28px rgba(255,107,44,.42),0 0 0 4px rgba(255,107,44,.14);transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;color:var(--dk-text);
  border-color:rgba(34,211,238,.55);
}
.btn-ghost:hover{background:rgba(34,211,238,.1);box-shadow:0 0 22px rgba(34,211,238,.28);transform:translateY(-2px);}
.btn-line{
  background:#fff;color:var(--ink);border-color:var(--line-light);
  box-shadow:var(--sh-light);
}
.btn-line:hover{border-color:var(--c-cyan);color:var(--c-orange);transform:translateY(-2px);}
.nav-toggle{
  display:none;width:46px;height:42px;border-radius:10px;
  background:rgba(255,255,255,.05);border:1px solid var(--c-line);
  padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--dk-text);}

/* ---------- hero ---------- */
.article-hero{
  position:relative;
  background:linear-gradient(180deg,rgba(12,15,20,.9) 0%,rgba(12,15,20,.94) 60%,rgba(12,15,20,.99) 100%),
             url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color:var(--dk-text);
  padding:46px 0 78px;
  overflow:hidden;
}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(650px 300px at 12% 0%,rgba(34,211,238,.16),transparent 65%),
             radial-gradient(520px 260px at 88% 12%,rgba(255,107,44,.14),transparent 62%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;max-width:900px;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--dk-muted);}
.crumb a{color:var(--dk-muted);}
.crumb a:hover{color:var(--c-cyan);}
.crumb .sep{opacity:.5;}
.crumb .current{color:#D6E0EA;}
.article-title{
  font-size:clamp(28px,4.1vw,46px);
  font-weight:800;line-height:1.3;
  margin:16px 0 18px;color:#fff;
  text-shadow:0 6px 24px rgba(0,0,0,.4);
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:20px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.4px;
}
.badge-cat{background:rgba(255,107,44,.16);color:#FFB48A;border:1px solid rgba(255,107,44,.42);}
.badge-time{background:rgba(255,255,255,.06);color:var(--dk-muted);border:1px solid var(--c-line);font-variant-numeric:tabular-nums;}
.badge-src{background:rgba(34,211,238,.12);color:#9BEAF6;border:1px solid rgba(34,211,238,.35);}
.article-lead{
  position:relative;
  margin:0;padding:4px 0 4px 18px;
  font-size:16.5px;line-height:1.95;color:#BCC7D3;max-width:820px;
}
.article-lead::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--c-cyan),var(--c-orange));
  box-shadow:0 0 14px rgba(34,211,238,.5);
}

/* ---------- reading ---------- */
.reading-section{padding:0 0 72px;background:var(--paper);}
.article-shell{
  position:relative;z-index:3;
  margin-top:-42px;
  background:var(--paper-2);
  border:1px solid var(--line-light);
  border-radius:var(--r-card);
  box-shadow:var(--sh-light);
  padding:40px 48px 46px;
}
.article-cover{
  width:100%;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line-light);
  margin-bottom:32px;
  background:#0C0F14;
}
.article-cover img{width:100%;height:auto;}
.article-body{max-width:820px;margin:0 auto;font-size:17px;line-height:2;color:#2A323D;}
.article-body p{margin:0 0 1.2em;line-height:2;}
.article-body h2{
  font-size:clamp(22px,2.6vw,29px);
  margin:1.9em 0 .7em;padding-left:14px;
  border-left:4px solid var(--c-orange);
  color:#141A22;line-height:1.4;
}
.article-body h3{font-size:20px;margin:1.6em 0 .6em;color:#1B1F26;}
.article-body h4{font-size:18px;margin:1.4em 0 .5em;color:#1B1F26;}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.4em;}
.article-body ul li{list-style:disc;margin-bottom:.55em;line-height:1.95;}
.article-body ol li{list-style:decimal;margin-bottom:.55em;line-height:1.95;}
.article-body a{color:var(--c-orange);border-bottom:1px solid rgba(255,107,44,.35);}
.article-body a:hover{color:#E2560F;border-bottom-color:#E2560F;}
.article-body img{border-radius:var(--r-img);margin:1.5em auto;border:1px solid var(--line-light);}
.article-body blockquote{
  margin:1.6em 0;padding:16px 20px;
  background:#F2FBFC;border-left:4px solid var(--c-cyan);
  border-radius:0 12px 12px 0;color:#2C3A44;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body strong{color:#12161C;font-weight:700;}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15.5px;}
.article-body th,.article-body td{border:1px solid var(--line-light);padding:10px 12px;text-align:left;}
.article-body th{background:#F3F5F9;font-weight:700;}
.article-body hr{border:0;border-top:1px solid var(--line-light);margin:2em 0;}
.article-body code{background:#F1F3F7;border-radius:6px;padding:2px 6px;font-size:15px;color:#B4431A;}
.article-empty{
  max-width:640px;margin:0 auto;text-align:center;padding:26px 0 12px;
}
.article-empty .empty-mark{
  width:56px;height:56px;margin:0 auto 18px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(255,107,44,.1);border:1px solid rgba(255,107,44,.35);
  color:var(--c-orange);font-size:24px;
}
.article-empty h2{font-size:24px;margin-bottom:10px;color:#141A22;}
.article-empty p{color:var(--ink-2);margin-bottom:22px;}

/* ---------- recommends ---------- */
.recommend{padding:8px 0 84px;background:var(--paper);}
.sec-head{margin-bottom:30px;}
.sec-kicker{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:1.6px;
  color:#0F9FB4;background:rgba(34,211,238,.12);
  border:1px solid rgba(34,211,238,.32);
  padding:5px 12px;border-radius:999px;margin-bottom:14px;
}
.sec-head h2{font-size:clamp(24px,2.9vw,34px);color:#141A22;}
.sec-head p{margin:12px 0 0;color:var(--ink-2);max-width:760px;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rec-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:#fff;border:1px solid var(--line-light);border-radius:var(--r-card);
  box-shadow:var(--sh-light);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rec-card:hover{transform:translateY(-4px);border-color:var(--c-cyan);box-shadow:0 16px 34px rgba(15,23,42,.14);}
.rec-card .thumb{aspect-ratio:16/9;overflow:hidden;background:#0C0F14;}
.rec-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.rec-card:hover .thumb img{transform:scale(1.05);}
.rec-card .body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rec-card h3{font-size:18.5px;color:#141A22;transition:color .2s ease;}
.rec-card:hover h3{color:var(--c-orange);}
.rec-card p{font-size:15px;color:var(--ink-2);margin:0;line-height:1.85;}
.rec-card .go{margin-top:auto;font-size:14.5px;font-weight:700;color:#0F9FB4;display:inline-flex;align-items:center;gap:7px;}
.rec-card .go i{transition:transform .2s ease;}
.rec-card:hover .go i{transform:translateX(4px);}

/* ---------- back link & cta ---------- */
.back-row{display:flex;justify-content:center;margin-top:34px;}
.back-link{
  display:inline-flex;align-items:center;gap:10px;
  font-size:15.5px;font-weight:700;color:#0F9FB4;
  padding:10px 18px;border-radius:var(--r-btn);
  border:1px dashed rgba(34,211,238,.5);
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.back-link:hover{background:rgba(34,211,238,.1);border-color:var(--c-cyan);color:#0C8C9E;}
.cta-band{
  background:linear-gradient(135deg,#0C0F14 0%,#161E29 100%);
  border-top:1px solid var(--c-line);
  padding:64px 0 70px;color:var(--dk-text);
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(560px 260px at 82% 20%,rgba(255,107,44,.18),transparent 62%),
             radial-gradient(460px 240px at 10% 90%,rgba(34,211,238,.16),transparent 60%);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;}
.cta-inner h2{font-size:clamp(22px,2.7vw,32px);color:#fff;margin-bottom:10px;}
.cta-inner p{margin:0;color:var(--dk-muted);max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- footer ---------- */
.site-footer{
  background:#0C0F14;color:var(--dk-muted);
  border-top:1px solid var(--c-line);position:relative;padding:58px 0 26px;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(34,211,238,0),rgba(34,211,238,.6),rgba(255,107,44,.5),rgba(34,211,238,0));
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px;}
.footer-brand .brand{margin-bottom:16px;color:var(--dk-text);}
.footer-brand p{font-size:14.5px;line-height:1.9;margin:0;color:var(--dk-muted);}
.footer-col h4{font-size:15px;color:#E7EEF5;margin-bottom:16px;letter-spacing:.6px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:14.5px;color:var(--dk-muted);}
.footer-col ul a:hover{color:var(--c-cyan);}
.footer-note{font-size:14px;line-height:1.9;margin:0;color:var(--dk-muted);}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13.5px;color:#7A8593;font-variant-numeric:tabular-nums;
}

/* ---------- responsive ---------- */
@media screen and (max-width:1023px){
  .nav-toggle{display:flex;}
  .nav-wrap{
    position:fixed;top:73px;left:0;right:0;bottom:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(10,13,18,.98);
    padding:20px 20px 40px;overflow-y:auto;
    transform:translateX(100%);opacity:0;visibility:hidden;
    transition:transform .28s ease,opacity .28s ease,visibility .28s ease;
  }
  .nav-wrap.is-open{transform:translateX(0);opacity:1;visibility:visible;}
  .main-nav{flex-direction:column;align-items:stretch;gap:4px;}
  .main-nav a{padding:15px 14px;font-size:16px;min-height:48px;display:flex;align-items:center;}
  .main-nav a.active{background:rgba(34,211,238,.1);border-radius:10px;}
  .main-nav a.active::after{display:none;}
  .header-cta{margin-top:22px;}
  .header-cta .btn{width:100%;}
  .article-shell{padding:32px 26px 36px;margin-top:-30px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
}
@media screen and (max-width:767px){
  body{font-size:16px;}
  .header-inner{height:64px;}
  .nav-wrap{top:65px;}
  .brand{font-size:16.5px;}
  .article-hero{padding:32px 0 60px;}
  .article-title{margin:12px 0 14px;}
  .article-lead{font-size:15.5px;}
  .article-shell{padding:24px 18px 30px;border-radius:14px;margin-top:-26px;}
  .article-body{font-size:16.5px;}
  .reading-section{padding-bottom:52px;}
  .recommend{padding-bottom:60px;}
  .card-grid{grid-template-columns:1fr;gap:18px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;}
  .cta-band{padding:50px 0 56px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
}
@media screen and (max-width:520px){
  .container{padding:0 16px;}
  .btn{padding:11px 18px;font-size:15px;}
  .article-meta{gap:8px;}
  .badge{font-size:12.5px;padding:4px 10px;}
}

/* roulang page: category1 */
:root{
  --bg-dark:#0C0F14;
  --bg-panel:#141A22;
  --bg-panel-2:#1A222C;
  --orange:#FF6B2C;
  --orange-2:#FF7A1A;
  --cyan:#22D3EE;
  --cyan-2:#25D9E8;
  --magenta:#E946C8;
  --text-light:#EAF0F6;
  --text-muted:#9AA6B2;
  --border-dark:rgba(255,255,255,.08);
  --bg-light:#F7F8FA;
  --bg-white:#FFFFFF;
  --text-dark:#1B1F26;
  --text-gray:#5B6472;
  --border-light:#E6E9EF;
  --radius-card:18px;
  --radius-btn:12px;
  --radius-img:14px;
  --radius-sm:10px;
  --shadow-dark:0 12px 30px rgba(0,0,0,.35);
  --shadow-light:0 8px 24px rgba(15,23,42,.08);
  --container:1240px;
  --space-section:104px;
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.9;
  color:var(--text-dark);
  background:var(--bg-light);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:var(--orange);}
button{font-family:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;}
h1,h2,h3,h4{margin:0 0 .6em;font-weight:800;line-height:1.25;color:inherit;letter-spacing:-.01em;}
h1{font-weight:800;}
p{margin:0 0 1.2em;}
ul{margin:0;padding:0;list-style:none;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.numeric{font-variant-numeric:tabular-nums;}

/* ---------- 顶栏导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(12,15,20,.94);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border-dark);
  box-shadow:0 1px 0 rgba(34,211,238,.28),0 10px 30px rgba(0,0,0,.35);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:74px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text-light);
  font-weight:800;
  font-size:19px;
  letter-spacing:.01em;
  flex:0 0 auto;
}
.brand:hover{color:#fff;}
.brand-mark{
  width:30px;
  height:30px;
  border-radius:9px;
  background:linear-gradient(135deg,var(--orange) 0%,var(--magenta) 55%,var(--cyan) 100%);
  box-shadow:0 0 0 1px rgba(255,255,255,.12),0 0 18px rgba(255,107,44,.55);
  position:relative;
  flex:0 0 auto;
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:9px;
  border-radius:3px;
  background:rgba(12,15,20,.85);
}
.brand-text{white-space:nowrap;}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:26px;
  flex:1 1 auto;
  justify-content:flex-end;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:15.5px;
  font-weight:600;
  color:var(--text-muted);
  border-radius:9px;
  white-space:nowrap;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:4px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .25s ease;
}
.main-nav a:hover{color:var(--text-light);background:rgba(255,255,255,.04);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:#fff;}
.main-nav a.active::after{transform:scaleX(1);box-shadow:0 0 12px rgba(34,211,238,.75);}
.header-cta{flex:0 0 auto;}
.nav-toggle{
  display:none;
  width:46px;
  height:46px;
  border-radius:11px;
  border:1px solid var(--border-dark);
  background:rgba(255,255,255,.04);
  padding:0;
  position:relative;
}
.nav-toggle span{
  position:absolute;
  left:13px;
  right:13px;
  height:2px;
  border-radius:2px;
  background:var(--text-light);
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle span:nth-child(1){top:15px;}
.nav-toggle span:nth-child(2){top:22px;}
.nav-toggle span:nth-child(3){top:29px;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 26px;
  border-radius:var(--radius-btn);
  font-size:16px;
  font-weight:700;
  border:1px solid transparent;
  transition:transform .18s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn-sm{padding:10px 18px;font-size:14.5px;border-radius:10px;}
.btn-primary{
  background:linear-gradient(135deg,var(--orange) 0%,var(--orange-2) 100%);
  color:#15100B;
  box-shadow:0 8px 22px rgba(255,107,44,.28);
}
.btn-primary:hover{
  color:#100C08;
  background:linear-gradient(135deg,var(--orange-2) 0%,#FF8C42 100%);
  box-shadow:0 0 0 1px rgba(255,140,66,.5),0 10px 30px rgba(255,107,44,.45);
  transform:translateY(-2px);
}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;
  color:var(--cyan);
  border-color:rgba(34,211,238,.55);
}
.btn-ghost:hover{
  color:#EAFDFF;
  background:rgba(34,211,238,.1);
  border-color:var(--cyan);
  box-shadow:0 0 18px rgba(34,211,238,.35);
  transform:translateY(-2px);
}
.btn:focus-visible,a:focus-visible,button:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
}

/* ---------- 内页 Hero ---------- */
.page-hero{
  position:relative;
  background:#0C0F14 url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  color:var(--text-light);
  padding:64px 0 72px;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,rgba(12,15,20,.96) 0%,rgba(12,15,20,.86) 46%,rgba(12,15,20,.6) 100%);
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(34,211,238,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(34,211,238,.05) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.6;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text-muted);
  margin-bottom:20px;
}
.crumb a{color:var(--text-muted);}
.crumb a:hover{color:var(--cyan);}
.crumb i{font-size:11px;opacity:.65;}
.badge-line{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 15px;
  border-radius:999px;
  font-size:13.5px;
  font-weight:600;
  color:var(--cyan);
  background:rgba(34,211,238,.1);
  border:1px solid rgba(34,211,238,.32);
  margin-bottom:20px;
}
.badge-line i{font-size:12px;}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:48px;
  align-items:center;
}
.page-hero h1{
  font-size:clamp(30px,4.2vw,50px);
  color:#fff;
  margin:0 0 18px;
  text-shadow:0 6px 26px rgba(0,0,0,.5);
}
.page-hero h1 em{
  font-style:normal;
  background:linear-gradient(100deg,var(--orange) 10%,var(--orange-2) 60%,var(--cyan) 120%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero-lead{
  font-size:17.5px;
  line-height:1.95;
  color:#C7D1DC;
  max-width:620px;
  margin:0 0 30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
  max-width:640px;
}
.stat-cell{
  background:rgba(20,26,34,.82);
  border:1px solid var(--border-dark);
  border-radius:14px;
  padding:16px 18px;
}
.stat-num{
  font-size:24px;
  font-weight:800;
  color:var(--orange);
  letter-spacing:.02em;
}
.stat-label{font-size:13.5px;color:var(--text-muted);}
.hero-visual{
  position:relative;
  border-radius:20px;
  border:1px solid rgba(34,211,238,.35);
  overflow:hidden;
  box-shadow:var(--shadow-dark),0 0 26px rgba(34,211,238,.18);
}
.hero-visual img{width:100%;height:340px;object-fit:cover;border-radius:0;}
.hero-visual-tag{
  position:absolute;
  left:18px;
  bottom:18px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 16px;
  border-radius:999px;
  font-size:13.5px;
  font-weight:700;
  color:#15100B;
  background:linear-gradient(135deg,var(--orange),var(--orange-2));
  box-shadow:0 8px 20px rgba(255,107,44,.4);
}

/* ---------- 分类导航条 ---------- */
.cat-bar{
  background:var(--bg-panel);
  border-bottom:1px solid var(--border-dark);
  padding:0;
}
.cat-bar-inner{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  padding:18px 0;
}
.cat-link{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:11px 20px;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  color:var(--text-muted);
  background:rgba(255,255,255,.03);
  border:1px solid var(--border-dark);
}
.cat-link i{font-size:13px;color:var(--cyan);}
.cat-link:hover{
  color:#fff;
  border-color:rgba(34,211,238,.5);
  background:rgba(34,211,238,.08);
  box-shadow:0 0 16px rgba(34,211,238,.22);
}
.cat-link.current{
  color:#15100B;
  background:linear-gradient(135deg,var(--orange),var(--orange-2));
  border-color:transparent;
  box-shadow:0 8px 22px rgba(255,107,44,.32);
}
.cat-link.current i{color:#15100B;}

/* ---------- 通用板块 ---------- */
.section{padding:var(--space-section) 0;}
.section--tight{padding:72px 0;}
.section--light{background:var(--bg-white);}
.section--gray{background:var(--bg-light);}
.section--dark{background:var(--bg-dark);color:var(--text-light);}
.section--dark p{color:var(--text-muted);}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--orange);
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:26px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--orange),var(--cyan));
}
.section--dark .eyebrow{color:var(--cyan);}
.sec-title{font-size:clamp(24px,3vw,38px);margin-bottom:16px;}
.sec-desc{font-size:17px;color:var(--text-gray);line-height:1.95;margin:0;}
.section--dark .sec-desc{color:var(--text-muted);}

/* ---------- 九宫格入口 ---------- */
.entry-grid{margin-top:-8px;}
.entry-card{
  height:100%;
  background:var(--bg-white);
  border:1px solid var(--border-light);
  border-radius:var(--radius-card);
  padding:26px 24px 24px;
  box-shadow:var(--shadow-light);
  display:flex;
  flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.entry-card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,107,44,.55);
  box-shadow:0 16px 34px rgba(15,23,42,.14),0 0 0 1px rgba(255,107,44,.25);
}
.entry-icon{
  width:52px;
  height:52px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:21px;
  color:var(--orange);
  background:linear-gradient(135deg,rgba(255,107,44,.14),rgba(34,211,238,.12));
  border:1px solid rgba(255,107,44,.25);
  margin-bottom:18px;
}
.entry-card:hover .entry-icon{color:var(--cyan);border-color:rgba(34,211,238,.45);}
.entry-title{
  font-size:20px;
  font-weight:800;
  margin:0 0 10px;
  color:var(--text-dark);
  transition:color .2s ease;
}
.entry-card:hover .entry-title{color:var(--orange);}
.entry-desc{
  font-size:15.5px;
  line-height:1.85;
  color:var(--text-gray);
  margin:0 0 18px;
  flex:1 1 auto;
}
.entry-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;}
.tag{
  display:inline-block;
  padding:4px 11px;
  border-radius:999px;
  font-size:12.5px;
  font-weight:600;
  color:var(--text-gray);
  background:var(--bg-light);
  border:1px solid var(--border-light);
}
.tag--hot{color:#A8390F;background:rgba(255,107,44,.12);border-color:rgba(255,107,44,.3);}
.tag--new{color:#0E7490;background:rgba(34,211,238,.12);border-color:rgba(34,211,238,.32);}
.entry-go{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:700;
  color:var(--orange);
}
.entry-go i{transition:transform .2s ease;}
.entry-card:hover .entry-go i{transform:translateX(4px);}

/* ---------- 步骤流程 ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:26px;
  counter-reset:step;
}
.step{
  position:relative;
  background:var(--bg-panel);
  border:1px solid var(--border-dark);
  border-radius:var(--radius-card);
  padding:34px 26px 28px;
  box-shadow:var(--shadow-dark);
  transition:transform .22s ease,border-color .22s ease;
}
.step:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.45);}
.step::before{
  counter-increment:step;
  content:"0" counter(step);
  position:absolute;
  top:-18px;
  left:26px;
  font-size:15px;
  font-weight:800;
  letter-spacing:.06em;
  color:#15100B;
  background:linear-gradient(135deg,var(--orange),var(--orange-2));
  padding:7px 15px;
  border-radius:9px;
  box-shadow:0 8px 20px rgba(255,107,44,.3);
}
.step-title{font-size:20px;font-weight:800;color:#fff;margin:14px 0 12px;}
.step-text{font-size:15.5px;line-height:1.9;color:var(--text-muted);margin:0;}

/* ---------- 图文适配区 ---------- */
.fit-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:52px;
  align-items:center;
}
.fit-media{
  position:relative;
  border-radius:20px;
  overflow:hidden;
  border:1px solid var(--border-light);
  box-shadow:var(--shadow-light);
}
.fit-media img{width:100%;height:400px;object-fit:cover;border-radius:0;}
.check-list{margin:0 0 26px;}
.check-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:11px 0;
  border-bottom:1px dashed var(--border-light);
  font-size:16px;
  color:var(--text-gray);
  line-height:1.8;
}
.check-list li:last-child{border-bottom:none;}
.check-list i{
  color:var(--cyan);
  font-size:15px;
  margin-top:6px;
  flex:0 0 auto;
}
.check-list strong{color:var(--text-dark);font-weight:700;}
.note-strip{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:26px;
}
.note-item{
  flex:1 1 170px;
  background:var(--bg-light);
  border:1px solid var(--border-light);
  border-radius:14px;
  padding:16px 18px;
}
.note-item span{display:block;}
.note-item .n-key{font-size:13px;color:var(--text-gray);margin-bottom:4px;}
.note-item .n-val{font-size:17px;font-weight:800;color:var(--text-dark);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:920px;margin:0 auto;}
.faq-item{
  background:var(--bg-white);
  border:1px solid var(--border-light);
  border-radius:14px;
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item:hover{border-color:rgba(34,211,238,.5);}
.faq-item.open{
  border-color:rgba(34,211,238,.6);
  box-shadow:0 10px 26px rgba(15,23,42,.09);
}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:20px 24px;
  background:transparent;
  border:none;
  text-align:left;
  font-size:17px;
  font-weight:700;
  color:var(--text-dark);
  line-height:1.6;
}
.faq-q:hover{color:var(--orange);}
.faq-item.open .faq-q{
  color:var(--text-dark);
  border-left:3px solid var(--cyan);
  padding-left:21px;
}
.faq-q i{
  flex:0 0 auto;
  font-size:14px;
  color:var(--cyan);
  transition:transform .25s ease;
}
.faq-item.open .faq-q i{transform:rotate(180deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .32s ease;
}
.faq-item.open .faq-a{max-height:520px;}
.faq-a-inner{
  padding:0 24px 22px 27px;
  font-size:16px;
  line-height:1.9;
  color:var(--text-gray);
  border-left:3px solid transparent;
}
.faq-item.open .faq-a-inner{border-left:3px solid rgba(34,211,238,.5);padding-left:24px;}

/* ---------- 底部 CTA ---------- */
.cta-band{
  position:relative;
  background:#0C0F14 url("/assets/images/backpic/back-3.png") center/cover no-repeat;
  color:var(--text-light);
  padding:84px 0;
  overflow:hidden;
  border-top:1px solid var(--border-dark);
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(115deg,rgba(12,15,20,.96),rgba(12,15,20,.8) 55%,rgba(255,107,44,.24));
}
.cta-band .container{position:relative;z-index:2;}
.cta-inner{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:40px;
  align-items:center;
}
.cta-inner h2{font-size:clamp(24px,3vw,38px);color:#fff;margin-bottom:16px;}
.cta-inner p{color:#C7D1DC;font-size:17px;line-height:1.95;margin:0;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-dark);
  color:var(--text-muted);
  padding:60px 0 28px;
  border-top:1px solid rgba(34,211,238,.35);
  font-size:15px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:38px;
  padding-bottom:38px;
  border-bottom:1px solid var(--border-dark);
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{margin:0;line-height:1.9;color:var(--text-muted);max-width:360px;}
.footer-col h4{
  font-size:16px;
  color:#fff;
  margin:0 0 16px;
  font-weight:700;
}
.footer-col ul li{margin-bottom:11px;}
.footer-col a{color:var(--text-muted);font-size:14.8px;}
.footer-col a:hover{color:var(--cyan);}
.footer-note{margin:0;line-height:1.9;font-size:14.5px;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:space-between;
  padding-top:24px;
  font-size:14px;
  color:#7C8794;
}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1024px){
  :root{--space-section:76px;}
  .header-inner{min-height:66px;}
  .nav-toggle{display:block;}
  .nav-wrap{
    position:fixed;
    top:66px;
    right:0;
    bottom:0;
    width:min(340px,86vw);
    background:#0F141A;
    border-left:1px solid var(--border-dark);
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:26px 22px;
    transform:translateX(105%);
    transition:transform .3s ease;
    box-shadow:-18px 0 40px rgba(0,0,0,.5);
    overflow-y:auto;
  }
  .nav-wrap.open{transform:translateX(0);}
  .main-nav{flex-direction:column;align-items:stretch;gap:4px;}
  .main-nav a{padding:15px 14px;font-size:16.5px;min-height:48px;display:flex;align-items:center;border-bottom:1px solid var(--border-dark);border-radius:0;}
  .main-nav a::after{display:none;}
  .main-nav a.active{background:rgba(34,211,238,.08);border-left:3px solid var(--cyan);color:#fff;}
  .header-cta{margin-top:22px;}
  .header-cta .btn{width:100%;}
  .hero-grid{grid-template-columns:1fr;gap:38px;}
  .hero-visual img{height:280px;}
  .fit-grid{grid-template-columns:1fr;gap:34px;}
  .fit-media img{height:320px;}
  .steps{grid-template-columns:1fr;gap:36px;}
  .cta-inner{grid-template-columns:1fr;gap:28px;}
  .cta-actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media screen and (max-width:768px){
  :root{--space-section:60px;}
  body{font-size:16px;}
  .container{padding:0 18px;}
  .page-hero{padding:48px 0 56px;}
  .hero-stats{grid-template-columns:1fr;gap:12px;max-width:100%;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{flex:1 1 100%;}
  .cat-bar-inner{gap:8px;}
  .cat-link{padding:9px 15px;font-size:14px;}
  .section-head{margin-bottom:34px;}
  .entry-card{padding:22px 20px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:6px;}
}
@media screen and (max-width:520px){
  body{font-size:16px;line-height:1.85;}
  .brand{font-size:17px;}
  .brand-mark{width:26px;height:26px;}
  .brand-mark::after{inset:8px;}
  .hero-visual img{height:220px;}
  .fit-media img{height:220px;}
  .btn{padding:13px 20px;font-size:15px;}
  .faq-q{padding:17px 18px;font-size:16px;}
  .faq-a-inner{padding:0 18px 18px;}
  .note-item{flex:1 1 100%;}
  .cta-band{padding:60px 0;}
}

/* roulang page: category2 */
:root{
  --c-bg:#0C0F14;
  --c-panel:#141A22;
  --c-panel-2:#1A212B;
  --c-panel-3:#202836;
  --c-line:rgba(255,255,255,.08);
  --c-line-strong:rgba(255,255,255,.16);
  --c-primary:#FF6B2C;
  --c-primary-2:#FF7A1A;
  --c-accent:#22D3EE;
  --c-magenta:#E15CFF;
  --c-text:#EAF0F6;
  --c-muted:#9AA6B2;
  --c-light:#F7F8FA;
  --c-light-2:#FFFFFF;
  --c-light-text:#1B1F26;
  --c-light-muted:#5B6472;
  --c-light-line:#E6E9EF;
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --r-pill:999px;
  --sh-dark:0 12px 30px rgba(0,0,0,.35);
  --sh-dark-lg:0 22px 52px rgba(0,0,0,.5);
  --sh-light:0 8px 24px rgba(15,23,42,.08);
  --glow-cyan:0 0 18px rgba(34,211,238,.45);
  --glow-orange:0 0 20px rgba(255,107,44,.5);
  --maxw:1240px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation 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:17px;
  line-height:1.9;
  color:var(--c-text);
  background:var(--c-bg);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:inherit;text-decoration:none;transition:color .22s ease,border-color .22s ease,background-color .22s ease,box-shadow .22s ease,transform .22s ease;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;}
h1,h2,h3,h4{margin:0;line-height:1.28;font-weight:800;letter-spacing:.2px;}
p{margin:0 0 1.2em;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
input{font-family:inherit;}

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

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(12,15,20,.94);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--c-line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.85),rgba(255,107,44,.6),transparent);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px;}
.brand{display:inline-flex;align-items:center;gap:11px;font-weight:800;font-size:19px;letter-spacing:.6px;color:var(--c-text);}
.brand-mark{
  position:relative;width:32px;height:32px;border-radius:10px;flex:0 0 32px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-accent));
  box-shadow:0 0 0 1px rgba(255,255,255,.1),var(--glow-orange);
}
.brand-mark::after{
  content:"";position:absolute;left:11px;top:9px;width:0;height:0;
  border-left:10px solid #0C0F14;border-top:7px solid transparent;border-bottom:7px solid transparent;
}
.brand:hover .brand-text{color:var(--c-accent);}
.brand-text{transition:color .22s ease;}

.nav-wrap{display:flex;align-items:center;gap:22px;}
.main-nav{display:flex;align-items:center;gap:4px;}
.main-nav a{
  position:relative;display:inline-block;padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--c-muted);white-space:nowrap;
}
.main-nav a:hover{color:var(--c-text);background:rgba(255,255,255,.05);box-shadow:inset 0 0 16px rgba(34,211,238,.16);}
.main-nav a.active{color:#fff;background:rgba(34,211,238,.1);}
.main-nav a.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--c-accent),var(--c-primary));
  box-shadow:0 0 10px rgba(34,211,238,.85);
}
.header-cta{display:flex;align-items:center;}

.nav-toggle{
  display:none;width:46px;height:46px;border:1px solid var(--c-line);border-radius:12px;
  background:rgba(255,255,255,.04);cursor:pointer;padding:0;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--c-text);transition:transform .25s ease,opacity .25s ease;}
.nav-toggle.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-active span:nth-child(2){opacity:0;}
.nav-toggle.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:16px;font-weight:700;cursor:pointer;
  transition:transform .18s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease,border-color .22s ease;
}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-primary{background:linear-gradient(135deg,var(--c-primary-2),var(--c-primary));color:#180A02;}
.btn-primary:hover{box-shadow:var(--glow-orange);transform:translateY(-2px);background:linear-gradient(135deg,#FF8A3D,#FF7A1A);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--c-accent);border-color:rgba(34,211,238,.55);}
.btn-ghost:hover{background:rgba(34,211,238,.1);box-shadow:var(--glow-cyan);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-light{background:#fff;color:var(--c-light-text);border-color:var(--c-light-line);box-shadow:var(--sh-light);}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(15,23,42,.16);}
.btn-text{color:var(--c-accent);background:none;border:none;padding:6px 0;font-weight:700;}
.btn-text:hover{color:#7DEBFA;}
.btn-text i{transition:transform .22s ease;}
.btn-text:hover i{transform:translateX(4px);}

/* ---------- 通用区块 ---------- */
.section{padding:96px 0;position:relative;}
.section-tight{padding:72px 0;}
.section-dark{background:var(--c-bg);}
.section-panel{background:var(--c-panel);}
.section-light{background:var(--c-light);color:var(--c-light-text);}
.section-light p{color:var(--c-light-muted);}
.section-cta{
  background:
    radial-gradient(900px 380px at 12% 0%,rgba(255,107,44,.18),transparent 60%),
    radial-gradient(760px 340px at 88% 100%,rgba(34,211,238,.16),transparent 62%),
    var(--c-bg);
  border-top:1px solid var(--c-line);
}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:2px;font-weight:700;color:var(--c-accent);
  padding:7px 14px;border-radius:var(--r-pill);
  background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.28);
  margin-bottom:18px;text-transform:uppercase;
}
.section-light .eyebrow{background:rgba(255,107,44,.1);border-color:rgba(255,107,44,.3);color:#D9500F;}

.section-head{max-width:760px;margin-bottom:48px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.h2{font-size:clamp(26px,3vw,38px);margin-bottom:16px;letter-spacing:.3px;}
.section-light .h2{color:var(--c-light-text);}
.lead{font-size:17px;line-height:1.95;color:var(--c-muted);margin:0;}
.section-light .lead{color:var(--c-light-muted);}

/* ---------- 分类页 Hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  padding:70px 0 62px;
  background:
    linear-gradient(180deg,rgba(12,15,20,.82) 0%,rgba(12,15,20,.9) 55%,rgba(12,15,20,.98) 100%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-bottom:1px solid var(--c-line);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(70% 80% at 30% 30%,#000,transparent 78%);
  -webkit-mask-image:radial-gradient(70% 80% at 30% 30%,#000,transparent 78%);
  pointer-events:none;
}
.cat-hero .container{position:relative;z-index:2;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--c-muted);margin-bottom:22px;}
.crumbs a{color:var(--c-muted);}
.crumbs a:hover{color:var(--c-accent);}
.crumbs i{font-size:11px;opacity:.6;}
.cat-hero h1{
  font-size:clamp(32px,4.4vw,54px);
  line-height:1.2;margin-bottom:20px;letter-spacing:.4px;
}
.cat-hero h1 .hl{
  background:linear-gradient(120deg,var(--c-primary),var(--c-primary-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.cat-hero .hero-sub{
  max-width:660px;font-size:17px;line-height:1.98;color:var(--c-muted);margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;}
.pill{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:var(--r-pill);font-size:13px;font-weight:600;
  background:rgba(255,255,255,.05);border:1px solid var(--c-line);color:var(--c-muted);
}
.pill i{color:var(--c-accent);font-size:12px;}
.pill.orange i{color:var(--c-primary);}
.pill.magenta i{color:var(--c-magenta);}

/* ---------- 分类导航条 ---------- */
.cat-nav{border-bottom:1px solid var(--c-line);background:var(--c-panel);}
.cat-nav-inner{display:flex;gap:10px;overflow-x:auto;padding:14px 0;scrollbar-width:none;}
.cat-nav-inner::-webkit-scrollbar{display:none;}
.cat-nav-inner a{
  flex:0 0 auto;padding:10px 18px;border-radius:var(--r-pill);font-size:14.5px;font-weight:600;
  color:var(--c-muted);border:1px solid var(--c-line);background:rgba(255,255,255,.02);
}
.cat-nav-inner a:hover{color:var(--c-text);border-color:rgba(34,211,238,.5);box-shadow:var(--glow-cyan);}
.cat-nav-inner a.is-current{
  color:#180A02;background:linear-gradient(135deg,var(--c-primary-2),var(--c-primary));
  border-color:transparent;box-shadow:var(--glow-orange);
}

/* ---------- 数据速览 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.stat{
  background:linear-gradient(180deg,var(--c-panel-2),var(--c-panel));
  border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px 24px;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.stat:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.5);box-shadow:var(--sh-dark),var(--glow-cyan);}
.stat .num{
  font-family:var(--mono);font-size:34px;font-weight:800;letter-spacing:1px;
  color:var(--c-primary);line-height:1;margin-bottom:12px;font-variant-numeric:tabular-nums;
}
.stat .lbl{font-size:15px;font-weight:700;color:var(--c-text);margin-bottom:6px;}
.stat .des{font-size:13.5px;color:var(--c-muted);line-height:1.75;margin:0;}

/* ---------- 时间线 ---------- */
.timeline-wrap{max-width:920px;}
.tl-group{margin-bottom:14px;}
.tl-date{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:14px;font-weight:700;letter-spacing:1px;
  color:var(--c-accent);padding:8px 16px;border-radius:var(--r-pill);
  background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.25);
  margin:0 0 22px 32px;
}
.timeline{position:relative;padding-left:32px;}
.timeline::before{
  content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--c-accent),rgba(255,107,44,.6) 55%,rgba(34,211,238,0));
}
.tl-item{position:relative;padding-bottom:30px;}
.tl-item::before{
  content:"";position:absolute;left:-29px;top:7px;width:14px;height:14px;border-radius:50%;
  background:var(--c-bg);border:2px solid var(--c-accent);box-shadow:var(--glow-cyan);
}
.tl-item.is-key::before{border-color:var(--c-primary);box-shadow:var(--glow-orange);}
.tl-card{
  background:linear-gradient(180deg,var(--c-panel-2),var(--c-panel));
  border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px 24px;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.tl-card:hover{transform:translateY(-4px);border-color:rgba(255,107,44,.5);box-shadow:var(--sh-dark-lg);}
.tl-top{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:12px;}
.tl-time{
  font-family:var(--mono);font-size:15px;font-weight:700;color:var(--c-primary);
  font-variant-numeric:tabular-nums;
}
.tag{
  display:inline-flex;align-items:center;
  padding:4px 11px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:700;border:1px solid transparent;
}
.tag-cyan{color:var(--c-accent);background:rgba(34,211,238,.1);border-color:rgba(34,211,238,.3);}
.tag-orange{color:var(--c-primary);background:rgba(255,107,44,.1);border-color:rgba(255,107,44,.32);}
.tag-magenta{color:var(--c-magenta);background:rgba(225,92,255,.1);border-color:rgba(225,92,255,.3);}
.tl-card h3{font-size:19px;margin-bottom:10px;color:var(--c-text);}
.tl-card p{font-size:15.5px;line-height:1.9;color:var(--c-muted);margin:0;}
.tl-foot{margin-top:14px;display:flex;flex-wrap:wrap;gap:18px;align-items:center;font-size:14px;color:var(--c-muted);}
.tl-foot .btn-text{font-size:14px;}

/* ---------- 图文双栏 ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.split-media{position:relative;}
.split-media img{
  width:100%;border-radius:20px;box-shadow:var(--sh-light);
  border:1px solid var(--c-light-line);
}
.split-media .badge-float{
  position:absolute;left:-18px;bottom:-18px;
  background:#0C0F14;color:var(--c-text);
  border:1px solid rgba(34,211,238,.45);
  border-radius:16px;padding:16px 20px;box-shadow:var(--sh-dark);
  min-width:180px;
}
.split-media .badge-float .bt{font-family:var(--mono);font-size:22px;font-weight:800;color:var(--c-accent);}
.split-media .badge-float .bs{font-size:13px;color:var(--c-muted);margin:0;}

.key-list{margin-top:26px;display:grid;gap:16px;}
.key-item{
  background:#fff;border:1px solid var(--c-light-line);border-radius:16px;
  padding:20px 22px;box-shadow:var(--sh-light);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.key-item:hover{transform:translateY(-4px);border-color:rgba(255,107,44,.45);box-shadow:0 16px 34px rgba(15,23,42,.14);}
.key-item h3{display:flex;align-items:center;gap:10px;font-size:18px;color:var(--c-light-text);margin-bottom:8px;}
.key-item h3 i{color:var(--c-primary);font-size:16px;}
.key-item p{font-size:15px;margin:0;line-height:1.85;}

/* ---------- 订阅表单 ---------- */
.subscribe{
  background:#fff;border:1px solid var(--c-light-line);border-radius:22px;
  padding:40px;box-shadow:var(--sh-light);
}
.subscribe h2{font-size:clamp(24px,2.6vw,32px);color:var(--c-light-text);margin-bottom:14px;}
.subscribe > p{font-size:16px;margin-bottom:26px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:14px;font-weight:700;color:var(--c-light-text);}
.field input{
  height:52px;padding:0 16px;border-radius:12px;font-size:15.5px;
  border:1px solid var(--c-light-line);background:#fff;color:var(--c-light-text);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input::placeholder{color:#98A2B3;}
.field input:focus{border-color:var(--c-accent);box-shadow:0 0 0 4px rgba(34,211,238,.16);outline:none;}
.field.err input{border-color:#E5484D;box-shadow:0 0 0 4px rgba(229,72,77,.14);}
.field .hint{font-size:13px;color:var(--c-light-muted);}
.field .err-text{font-size:13px;color:#D93438;font-weight:600;display:none;}
.field.err .err-text{display:block;}
.subscribe-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:8px;}

/* ---------- FAQ ---------- */
.faq-acc{border:none;background:none;max-width:900px;margin:0 auto;}
.faq-acc .accordion-item{
  background:linear-gradient(180deg,var(--c-panel-2),var(--c-panel));
  border:1px solid var(--c-line);border-radius:16px;margin-bottom:14px;overflow:hidden;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.faq-acc .accordion-item:hover{border-color:rgba(34,211,238,.4);}
.faq-acc .accordion-item.is-active{border-color:rgba(34,211,238,.55);box-shadow:var(--sh-dark);}
.faq-acc .accordion-title{
  display:block;position:relative;padding:22px 60px 22px 26px;
  font-size:17px;font-weight:700;color:var(--c-text);
  background:none;border:none;line-height:1.6;
}
.faq-acc .accordion-title::before{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;right:26px;top:50%;transform:translateY(-50%);
  font-size:14px;color:var(--c-accent);transition:transform .25s ease;
}
.faq-acc .accordion-item.is-active .accordion-title::before{content:"\f068";transform:translateY(-50%) rotate(180deg);}
.faq-acc .accordion-item.is-active .accordion-title{color:var(--c-accent);}
.faq-acc .accordion-item.is-active .accordion-title::after{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--c-accent),var(--c-primary));box-shadow:var(--glow-cyan);
}
.faq-acc .accordion-content{
  padding:0 26px 24px 26px;background:none;border:none;color:var(--c-muted);font-size:15.5px;line-height:1.9;
}
.faq-acc .accordion-content p:last-child{margin-bottom:0;}

/* ---------- 底部 CTA ---------- */
.cta-box{
  display:grid;grid-template-columns:1.4fr .6fr;gap:40px;align-items:center;
  background:linear-gradient(120deg,rgba(255,107,44,.12),rgba(34,211,238,.1));
  border:1px solid var(--c-line-strong);border-radius:24px;padding:48px;box-shadow:var(--sh-dark-lg);
}
.cta-box h2{font-size:clamp(26px,3vw,36px);margin-bottom:16px;}
.cta-box p{color:var(--c-muted);font-size:16px;margin-bottom:0;}
.cta-actions{display:flex;flex-direction:column;gap:14px;}

/* ---------- 页脚 ---------- */
.site-footer{background:#080B10;border-top:1px solid var(--c-line);position:relative;padding:72px 0 0;}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.7),rgba(255,107,44,.55),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:52px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:14.5px;line-height:1.9;color:var(--c-muted);max-width:340px;margin:0;}
.footer-col h4{font-size:15px;color:var(--c-text);margin-bottom:18px;letter-spacing:.5px;}
.footer-col ul{display:grid;gap:12px;}
.footer-col ul a{font-size:14.5px;color:var(--c-muted);display:inline-block;}
.footer-col ul a:hover{color:var(--c-accent);transform:translateX(3px);}
.footer-note{font-size:14px;line-height:1.9;color:var(--c-muted);margin:0;}
.footer-bottom{
  border-top:1px solid var(--c-line);padding:22px 0;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.5px;color:#78838F;
}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1024px){
  body{font-size:16px;}
  .section{padding:76px 0;}
  .section-tight{padding:60px 0;}
  .nav-toggle{display:flex;}
  .nav-wrap{
    position:fixed;left:0;right:0;top:74px;bottom:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(8,11,16,.98);backdrop-filter:blur(10px);
    padding:20px 24px 40px;overflow-y:auto;
    transform:translateY(-12px);opacity:0;visibility:hidden;
    transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
    border-top:1px solid var(--c-line);
  }
  .nav-wrap.is-open{transform:translateY(0);opacity:1;visibility:visible;}
  .main-nav{flex-direction:column;align-items:stretch;gap:6px;width:100%;}
  .main-nav a{padding:15px 16px;font-size:16.5px;border-radius:12px;min-height:48px;display:flex;align-items:center;}
  .main-nav a.active::after{left:16px;right:auto;width:34px;bottom:8px;}
  .header-cta{margin-top:22px;width:100%;}
  .header-cta .btn{width:100%;padding:15px 20px;font-size:16px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .split{grid-template-columns:1fr;gap:40px;}
  .split-media .badge-float{left:14px;bottom:-16px;}
  .cta-box{grid-template-columns:1fr;padding:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .subscribe{padding:30px;}
}
@media screen and (max-width:768px){
  .container{padding:0 18px;}
  .section{padding:58px 0;}
  .section-head{margin-bottom:34px;}
  .cat-hero{padding:52px 0 46px;}
  .cat-hero .hero-sub{font-size:16px;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{flex:1 1 100%;}
  .timeline{padding-left:26px;}
  .timeline::before{left:7px;}
  .tl-item::before{left:-25px;width:12px;height:12px;}
  .tl-date{margin-left:26px;}
  .form-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media screen and (max-width:520px){
  .stat-grid{grid-template-columns:1fr;}
  .brand{font-size:17px;}
  .brand-mark{width:28px;height:28px;flex:0 0 28px;}
  .brand-mark::after{left:10px;top:8px;border-left-width:9px;border-top-width:6px;border-bottom-width:6px;}
  .tl-card{padding:18px 18px;}
  .subscribe{padding:22px;}
  .cta-box{padding:26px;}
  .cat-hero h1{font-size:30px;}
}

/* roulang page: category3 */
:root{
  --bg:#0C0F14;
  --bg-2:#0E131A;
  --panel:#141A22;
  --panel-2:#1A222C;
  --primary:#FF6B2C;
  --primary-2:#FF7A1A;
  --accent:#22D3EE;
  --magenta:#E24BC4;
  --text:#EAF0F6;
  --text-2:#9AA6B2;
  --light:#F7F8FA;
  --light-text:#1B1F26;
  --light-text-2:#5B6472;
  --border:rgba(255,255,255,.08);
  --border-light:#E6E9EF;
  --radius-lg:18px;
  --radius-md:14px;
  --radius-sm:10px;
  --shadow-dark:0 12px 30px rgba(0,0,0,.35);
  --shadow-light:0 8px 24px rgba(15,23,42,.08);
  --container:1240px;
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:800;letter-spacing:.2px}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
button{font-family:inherit}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section--light{background:var(--light);color:var(--light-text)}
.section--light h2,.section--light h3{color:var(--light-text)}
.section--light p{color:var(--light-text-2)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.12em;
  text-transform:uppercase;color:var(--accent);
  margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px;box-shadow:0 0 10px rgba(34,211,238,.8)}
.section-head h2{font-size:38px;margin-bottom:16px}
.section-head p{color:var(--text-2);font-size:17px}
.section--light .section-head p{color:var(--light-text-2)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(12,15,20,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(34,211,238,.28);
  box-shadow:0 10px 30px rgba(0,0,0,.45);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:74px;gap:20px}
.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  position:relative;width:36px;height:36px;border-radius:11px;
  background:linear-gradient(135deg,var(--primary),#FFA24C 70%);
  box-shadow:0 0 20px rgba(255,107,44,.5);
}
.brand-mark::after{
  content:"";position:absolute;left:14px;top:10px;
  width:0;height:0;
  border-top:8px solid transparent;
  border-bottom:8px solid transparent;
  border-left:12px solid #0C0F14;
}
.brand-text{font-size:19px;font-weight:800;letter-spacing:.5px;color:var(--text);white-space:nowrap}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:46px;height:46px;padding:0 11px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--border);border-radius:12px;cursor:pointer;
}
.nav-toggle span{display:block;height:2px;width:100%;background:var(--text);border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-wrap{display:flex;align-items:center;gap:28px;flex:1;justify-content:flex-end}
.main-nav{display:flex;align-items:center;gap:4px}
.main-nav a{
  position:relative;display:inline-block;
  padding:9px 14px;border-radius:10px;
  font-size:15px;font-weight:600;color:var(--text-2);
  white-space:nowrap;transition:color .2s ease,background .2s ease,box-shadow .2s ease;
}
.main-nav a:hover,.main-nav a:focus-visible{color:var(--text);background:rgba(255,255,255,.05);box-shadow:0 0 16px rgba(34,211,238,.18) inset}
.main-nav a.active{color:var(--text);background:linear-gradient(180deg,rgba(34,211,238,.16),rgba(34,211,238,.04));box-shadow:inset 0 -2px 0 var(--accent)}
.main-nav a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:-1px;height:2px;
  background:var(--accent);border-radius:2px;box-shadow:0 0 12px rgba(34,211,238,.9);
}
.header-cta{flex-shrink:0}
.nav-backdrop{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:700;line-height:1;cursor:pointer;
  border:1px solid transparent;transition:transform .18s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#161006;box-shadow:0 10px 24px rgba(255,107,44,.32)}
.btn-primary:hover,.btn-primary:focus-visible{background:linear-gradient(135deg,#FF7C3C,#FF8E2E);box-shadow:0 0 0 3px rgba(255,107,44,.16),0 12px 30px rgba(255,107,44,.45);color:#161006}
.btn-ghost{background:transparent;color:var(--accent);border-color:rgba(34,211,238,.55)}
.btn-ghost:hover,.btn-ghost:focus-visible{background:rgba(34,211,238,.12);box-shadow:0 0 22px rgba(34,211,238,.35);border-color:var(--accent);color:#BFF6FF}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-block{width:100%}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background-image:
    linear-gradient(100deg,rgba(12,15,20,.97) 0%,rgba(12,15,20,.88) 48%,rgba(12,15,20,.62) 100%),
    url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--border);
  padding:76px 0 64px;
}
.page-hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.6),transparent);
}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:52px;align-items:center}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-2);margin-bottom:20px;flex-wrap:wrap}
.crumbs a:hover{color:var(--accent)}
.crumbs span.sep{opacity:.5}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.06em;
  background:rgba(34,211,238,.12);color:var(--accent);
  border:1px solid rgba(34,211,238,.32);
}
.tag--magenta{background:rgba(226,75,196,.14);color:#F79BE4;border-color:rgba(226,75,196,.34)}
.tag--orange{background:rgba(255,107,44,.14);color:#FFAE80;border-color:rgba(255,107,44,.36)}
.page-hero h1{font-size:clamp(32px,4.4vw,54px);font-weight:800;letter-spacing:.4px;margin:18px 0 20px}
.page-hero h1 .hl{
  color:var(--primary);
  text-shadow:0 0 22px rgba(255,107,44,.45);
}
.hero-sub{font-size:17px;color:var(--text-2);max-width:640px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-media{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid rgba(34,211,238,.28);
  box-shadow:0 18px 46px rgba(0,0,0,.55),0 0 0 1px rgba(255,255,255,.03) inset;
}
.hero-media img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,15,20,0) 40%,rgba(12,15,20,.72) 100%);
  pointer-events:none;
}
.hero-media-badge{
  position:absolute;left:18px;bottom:18px;z-index:2;
  display:flex;align-items:center;gap:10px;
  padding:10px 16px;border-radius:999px;
  background:rgba(12,15,20,.82);border:1px solid rgba(34,211,238,.35);
  font-size:13px;font-weight:700;color:var(--text);
  backdrop-filter:blur(6px);
}
.hero-media-badge i{color:var(--accent)}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;
  margin-top:44px;
}
.stat{
  padding:18px 20px;border-radius:var(--radius-md);
  background:rgba(20,26,34,.78);
  border:1px solid var(--border);
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.stat:hover{border-color:rgba(34,211,238,.45);transform:translateY(-3px);box-shadow:var(--shadow-dark)}
.stat strong{
  display:block;font-size:26px;font-weight:800;color:var(--primary);
  font-variant-numeric:tabular-nums;letter-spacing:.5px;line-height:1.2;
}
.stat span{font-size:13px;color:var(--text-2)}

/* ---------- category bar ---------- */
.cat-bar{background:var(--bg-2);border-bottom:1px solid var(--border)}
.cat-bar-inner{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:16px 0}
.cat-bar-label{font-size:13px;font-weight:700;color:var(--text-2);letter-spacing:.08em;margin-right:6px}
.cat-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:999px;
  font-size:14px;font-weight:700;
  background:rgba(255,255,255,.04);
  border:1px solid var(--border);
  color:var(--text-2);
  transition:all .2s ease;
}
.cat-pill i{font-size:12px;opacity:.85}
.cat-pill:hover,.cat-pill:focus-visible{
  color:var(--text);border-color:rgba(34,211,238,.45);
  background:rgba(34,211,238,.1);
  box-shadow:0 0 18px rgba(34,211,238,.24);
}
.cat-pill.is-current{
  color:#161006;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  border-color:transparent;
  box-shadow:0 10px 24px rgba(255,107,44,.34);
}

/* ---------- feature rows ---------- */
.feature-row{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:52px;align-items:center;
  padding:44px 0;
  border-bottom:1px dashed rgba(255,255,255,.08);
}
.feature-row:last-child{border-bottom:0}
.feature-row .feature-media{position:relative}
.feature-row.reverse .feature-media{order:2}
.feature-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--radius-md);
  border:1px solid var(--border);
  box-shadow:var(--shadow-dark);
  transition:border-color .25s ease,transform .25s ease;
}
.feature-row:hover .feature-media img{border-color:rgba(34,211,238,.45);transform:translateY(-3px)}
.feature-index{
  display:inline-block;font-size:13px;font-weight:800;letter-spacing:.18em;
  color:var(--accent);margin-bottom:12px;
}
.feature-body h3{font-size:25px;margin-bottom:14px}
.feature-body p{color:var(--text-2);font-size:16.5px}
.check-list{margin-top:18px;display:grid;gap:10px}
.check-list li{
  position:relative;padding-left:28px;
  font-size:15.5px;color:var(--text);line-height:1.8;
}
.check-list li::before{
  content:"\f00c";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;left:0;top:2px;font-size:12px;
  color:var(--primary);
}
.note-strip{
  margin-top:20px;padding:14px 18px;border-radius:var(--radius-sm);
  background:rgba(34,211,238,.07);
  border-left:3px solid var(--accent);
  font-size:14.5px;color:var(--text-2);
}
.note-strip strong{color:var(--text)}

/* ---------- light section / cards ---------- */
.route-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
.route-card{
  background:#FFFFFF;border:1px solid var(--border-light);
  border-radius:var(--radius-lg);padding:26px 24px;
  box-shadow:var(--shadow-light);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.route-card:hover{transform:translateY(-4px);border-color:rgba(255,107,44,.45);box-shadow:0 16px 34px rgba(15,23,42,.14)}
.route-card .route-step{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#161006;font-weight:800;font-size:15px;margin-bottom:16px;
  font-variant-numeric:tabular-nums;
}
.route-card h3{font-size:19px;margin-bottom:10px;color:var(--light-text)}
.route-card p{font-size:15px;color:var(--light-text-2);margin:0}
.route-card ul{margin-top:12px;display:grid;gap:6px}
.route-card ul li{font-size:14px;color:var(--light-text-2);padding-left:16px;position:relative}
.route-card ul li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--primary)}

/* ---------- timeline ---------- */
.timeline{position:relative;padding-left:34px;margin-top:8px}
.timeline::before{
  content:"";position:absolute;left:8px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,var(--primary),var(--accent));
  opacity:.55;border-radius:2px;
}
.timeline-item{position:relative;padding-bottom:36px}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{
  content:"";position:absolute;left:-34px;top:8px;width:18px;height:18px;border-radius:50%;
  background:#0C0F14;border:2px solid var(--accent);
  box-shadow:0 0 14px rgba(34,211,238,.7);
}
.timeline-item h3{font-size:19px;margin-bottom:8px}
.timeline-item h3 span{
  display:inline-block;margin-left:10px;padding:2px 10px;border-radius:999px;
  font-size:12px;font-weight:700;color:var(--accent);
  background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.3);
  vertical-align:middle;
}
.timeline-item p{color:var(--text-2);font-size:15.5px;margin:0}

/* ---------- FAQ ---------- */
.faq-accordion{margin:0}
.faq-accordion .accordion-item{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .22s ease,box-shadow .22s ease,transform .22s ease;
}
.faq-accordion .accordion-item:hover{border-color:rgba(255,255,255,.16)}
.faq-accordion .accordion-item.is-active{
  border-color:rgba(34,211,238,.45);
  box-shadow:0 0 0 1px rgba(34,211,238,.16),0 14px 32px rgba(0,0,0,.42);
}
.faq-accordion .accordion-title{
  display:block;position:relative;
  padding:20px 56px 20px 22px;
  font-size:17px;font-weight:700;color:var(--text);
  background:transparent;border:0;
  transition:color .2s ease;
}
.faq-accordion .accordion-title::before{
  position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-family:"Font Awesome 6 Free";font-weight:900;content:"\f067";
  color:var(--accent);font-size:14px;
}
.faq-accordion .accordion-item.is-active .accordion-title{color:var(--accent)}
.faq-accordion .accordion-item.is-active .accordion-title::before{content:"\f068"}
.faq-accordion .accordion-content{
  padding:0 22px 22px;
  background:transparent;border:0;
  color:var(--text-2);font-size:15.5px;line-height:1.9;
  border-left:3px solid transparent;
}
.faq-accordion .accordion-item.is-active .accordion-content{border-left-color:var(--accent);padding-left:20px}
.faq-accordion .accordion-content p:last-child{margin-bottom:0}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:22px;
  padding:54px 48px;
  background:
    radial-gradient(120% 160% at 12% 0%,rgba(255,107,44,.22),transparent 58%),
    radial-gradient(100% 150% at 92% 100%,rgba(34,211,238,.18),transparent 60%),
    linear-gradient(135deg,#161C24,#0F141B);
  border:1px solid rgba(255,255,255,.1);
  box-shadow:var(--shadow-dark);
  display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);
  gap:36px;align-items:center;
}
.cta-band h2{font-size:32px;margin-bottom:14px}
.cta-band p{color:var(--text-2);font-size:16.5px;margin:0}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.cta-points span{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;
  color:var(--text-2);background:rgba(255,255,255,.05);border:1px solid var(--border);
}
.cta-points i{color:var(--accent);font-size:12px}

/* ---------- footer ---------- */
.site-footer{
  background:#0A0D12;
  border-top:1px solid rgba(34,211,238,.25);
  padding:64px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:18px}
.footer-brand p{color:var(--text-2);font-size:15px;max-width:360px;margin:0}
.footer-col h4{font-size:16px;margin-bottom:18px;color:var(--text);position:relative;padding-bottom:12px}
.footer-col h4::after{
  content:"";position:absolute;left:0;bottom:0;width:28px;height:2px;
  background:var(--accent);border-radius:2px;box-shadow:0 0 10px rgba(34,211,238,.8);
}
.footer-col ul{display:grid;gap:11px}
.footer-col ul a{font-size:15px;color:var(--text-2)}
.footer-col ul a:hover{color:var(--accent)}
.footer-note{font-size:14px;color:var(--text-2);line-height:1.85;margin:0}
.footer-bottom{
  border-top:1px solid var(--border);
  padding:22px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-2);
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .route-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1023px){
  .nav-toggle{display:flex}
  .nav-backdrop{
    display:block;position:fixed;inset:0;background:rgba(4,6,9,.66);
    opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:70;
  }
  .nav-backdrop.is-open{opacity:1;visibility:visible}
  .nav-wrap{
    position:fixed;top:0;right:0;z-index:90;
    width:min(86vw,352px);height:100vh;
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:0;padding:92px 24px 36px;
    background:#0E131A;border-left:1px solid var(--border);
    box-shadow:-24px 0 50px rgba(0,0,0,.6);
    transform:translateX(105%);
    transition:transform .3s ease;
    overflow-y:auto;
  }
  .nav-wrap.is-open{transform:translateX(0)}
  .main-nav{flex-direction:column;align-items:stretch;gap:4px}
  .main-nav a{
    display:flex;align-items:center;min-height:48px;
    padding:12px 14px;font-size:16px;color:var(--text);
  }
  .main-nav a.active{background:rgba(34,211,238,.12)}
  .main-nav a.active::after{display:none}
  .header-cta{margin-top:22px}
  .header-cta .btn{width:100%}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .feature-row{grid-template-columns:1fr;gap:26px;padding:36px 0}
  .feature-row.reverse .feature-media{order:0}
  .cta-band{grid-template-columns:1fr;padding:40px 28px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:64px 0}
  .section-head h2{font-size:30px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .page-hero{padding:48px 0 46px}
  .page-hero h1{font-size:32px}
  .hero-sub{font-size:16px}
  .section{padding:52px 0}
  .section-head{margin-bottom:32px}
  .section-head h2{font-size:26px}
  .feature-body h3{font-size:21px}
  .route-grid{grid-template-columns:1fr}
  .timeline{padding-left:28px}
  .timeline-item::before{left:-28px;width:14px;height:14px}
  .cta-band h2{font-size:24px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq-accordion .accordion-title{font-size:16px;padding:18px 48px 18px 20px}
}
@media (max-width:519px){
  .hero-stats{grid-template-columns:1fr;gap:10px}
  .hero-actions .btn{width:100%}
  .cat-bar-inner{gap:8px}
  .cat-pill{padding:8px 14px;font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category4 */
:root{
  --bg:#0C0F14;
  --bg-2:#0F141B;
  --panel:#141A22;
  --panel-2:#19212B;
  --ink:#EAF0F6;
  --ink-2:#9AA6B2;
  --ink-3:#6F7B88;
  --orange:#FF6B2C;
  --orange-2:#FF7A1A;
  --cyan:#22D3EE;
  --magenta:#E554D6;
  --line:rgba(255,255,255,.08);
  --line-cyan:rgba(34,211,238,.38);
  --line-orange:rgba(255,107,44,.42);
  --paper:#F7F8FA;
  --paper-2:#FFFFFF;
  --paper-ink:#1B1F26;
  --paper-sub:#5B6472;
  --paper-line:#E6E9EF;
  --radius:16px;
  --radius-lg:18px;
  --radius-btn:12px;
  --shadow-dark:0 12px 30px rgba(0,0,0,.35);
  --shadow-light:0 8px 24px rgba(15,23,42,.08);
  --maxw:1240px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  background:var(--bg);
  color:var(--ink);
  font-size:17px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:800;letter-spacing:.2px;}
p{margin:0;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;position:relative;}
.section-sm{padding:64px 0;}
.section-dark{background:var(--bg);}
.section-panel{background:var(--bg-2);}
.section-paper{background:var(--paper);color:var(--paper-ink);}
.section-paper .sec-sub,.section-paper .muted{color:var(--paper-sub);}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:2px;text-transform:uppercase;
  color:var(--cyan);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--cyan),transparent);display:block;}
h2.sec-title{font-size:34px;font-weight:800;margin-bottom:14px;}
.sec-sub{font-size:17px;color:var(--ink-2);line-height:1.9;}
.muted{color:var(--ink-2);}

/* ============ 顶栏导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(12,15,20,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(34,211,238,.28),var(--shadow-dark);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:76px;gap:20px;}
.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex-shrink:0;position:relative;
  background:linear-gradient(135deg,var(--orange) 0%,var(--orange-2) 48%,var(--cyan) 100%);
  box-shadow:0 0 0 1px rgba(255,255,255,.08),0 6px 18px rgba(255,107,44,.35);
}
.brand-mark::after{
  content:"";position:absolute;inset:0;margin:auto;width:0;height:0;
  border-left:10px solid rgba(12,15,20,.88);
  border-top:7px solid transparent;border-bottom:7px solid transparent;
  transform:translateX(2px);
}
.brand-text{font-size:19px;font-weight:800;letter-spacing:.5px;color:var(--ink);}
.nav-wrap{display:flex;align-items:center;gap:26px;}
.main-nav{display:flex;align-items:center;gap:6px;}
.main-nav a{
  position:relative;display:inline-block;padding:10px 14px;border-radius:10px;
  font-size:15.5px;font-weight:600;color:var(--ink-2);
  transition:color .2s ease,background .2s ease;
}
.main-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.main-nav a:hover{color:var(--ink);background:rgba(255,255,255,.04);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--ink);}
.main-nav a.active::after{transform:scaleX(1);box-shadow:0 0 10px rgba(34,211,238,.7);}
.header-cta{display:flex;align-items:center;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);font-weight:700;font-size:15.5px;
  padding:13px 24px;line-height:1;border:1px solid transparent;
  transition:transform .18s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn-sm{padding:11px 18px;font-size:14.5px;}
.btn-primary{
  background:linear-gradient(135deg,var(--orange),var(--orange-2));
  color:#12161C;
  box-shadow:0 8px 22px rgba(255,107,44,.32);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,255,255,.12),0 12px 30px rgba(255,107,44,.5);color:#0C0F14;}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;color:var(--cyan);border-color:var(--line-cyan);
}
.btn-ghost:hover{background:rgba(34,211,238,.1);box-shadow:0 0 20px rgba(34,211,238,.28);color:#8FF0FB;transform:translateY(-2px);}
.btn-light{
  background:#FFFFFF;color:var(--paper-ink);box-shadow:var(--shadow-light);
}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(15,23,42,.16);}
.btn-block{width:100%;}
.nav-toggle{
  display:none;width:46px;height:42px;border-radius:10px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--ink-2);transition:transform .25s ease,opacity .25s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);background:var(--cyan);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);background:var(--cyan);}

/* ============ 小 Hero ============ */
.hero-support{
  position:relative;overflow:hidden;
  padding:86px 0 74px;
  background:
    linear-gradient(180deg,rgba(12,15,20,.82) 0%,rgba(12,15,20,.94) 62%,var(--bg) 100%),
    url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.hero-support::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan),var(--orange),transparent);
  opacity:.7;
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center;position:relative;z-index:2;}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;padding:8px 16px;border-radius:999px;
  background:rgba(34,211,238,.1);border:1px solid var(--line-cyan);
  color:#9BEFFA;font-size:13.5px;font-weight:700;letter-spacing:.6px;margin-bottom:20px;
}
.hero-badge i{color:var(--cyan);}
h1.hero-title{
  font-size:clamp(32px,4.2vw,52px);font-weight:800;line-height:1.2;margin-bottom:20px;
}
h1.hero-title .hl{
  background:linear-gradient(120deg,var(--orange),var(--orange-2) 60%,#FFB27A);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{font-size:18px;color:var(--ink-2);max-width:640px;margin-bottom:30px;line-height:1.95;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:28px;padding-top:22px;border-top:1px solid var(--line);}
.hero-meta div{min-width:120px;}
.hero-meta .num{display:block;font-size:24px;font-weight:800;color:var(--cyan);font-variant-numeric:tabular-nums;line-height:1.3;}
.hero-meta .lbl{font-size:13.5px;color:var(--ink-3);}
.hero-card{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line-cyan);
  box-shadow:0 22px 50px rgba(0,0,0,.55),0 0 0 1px rgba(255,255,255,.04) inset;
}
.hero-card img{width:100%;height:320px;object-fit:cover;}
.hero-card .float-tag{
  position:absolute;left:16px;top:16px;
  padding:7px 14px;border-radius:999px;font-size:13px;font-weight:700;
  background:rgba(12,15,20,.78);border:1px solid var(--line-orange);color:#FFC29C;
  backdrop-filter:blur(6px);
}
.hero-card .card-foot{
  position:absolute;left:0;right:0;bottom:0;padding:18px 20px;
  background:linear-gradient(180deg,transparent,rgba(12,15,20,.94));
  font-size:15px;font-weight:600;color:var(--ink);
}

/* ============ 分类导航条 ============ */
.cat-tabs{border-bottom:1px solid var(--line);background:var(--bg-2);}
.cat-tabs-inner{display:flex;gap:14px;padding:18px 24px;overflow-x:auto;scrollbar-width:thin;max-width:var(--maxw);margin:0 auto;}
.cat-tabs-inner::-webkit-scrollbar{height:6px;}
.cat-tabs-inner::-webkit-scrollbar-thumb{background:rgba(34,211,238,.3);border-radius:6px;}
.cat-tab{
  display:inline-flex;align-items:center;gap:9px;flex-shrink:0;
  padding:11px 18px;border-radius:999px;font-size:15px;font-weight:600;
  color:var(--ink-2);border:1px solid var(--line);background:rgba(255,255,255,.02);
  transition:all .22s ease;
}
.cat-tab i{font-size:14px;color:var(--ink-3);transition:color .22s ease;}
.cat-tab:hover{color:var(--ink);border-color:var(--line-cyan);background:rgba(34,211,238,.07);transform:translateY(-2px);}
.cat-tab:hover i{color:var(--cyan);}
.cat-tab.current{
  color:#0C0F14;border-color:transparent;
  background:linear-gradient(135deg,var(--orange),var(--orange-2));
  box-shadow:0 8px 20px rgba(255,107,44,.3);
}
.cat-tab.current i{color:#0C0F14;}

/* ============ 步骤排查 ============ */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.step-card{
  position:relative;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:28px 24px 26px;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  overflow:hidden;
}
.step-card::before{
  content:"";position:absolute;left:0;top:0;height:3px;width:100%;
  background:linear-gradient(90deg,var(--cyan),transparent);opacity:.55;
}
.step-card:hover{transform:translateY(-4px);border-color:var(--line-cyan);box-shadow:var(--shadow-dark);}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;margin-bottom:18px;
  font-size:18px;font-weight:800;font-variant-numeric:tabular-nums;
  color:var(--orange);background:rgba(255,107,44,.12);border:1px solid var(--line-orange);
}
.step-card h3{font-size:20px;margin-bottom:10px;}
.step-card p{font-size:15.5px;color:var(--ink-2);line-height:1.85;}
.step-card .tip{
  display:inline-flex;align-items:center;gap:6px;margin-top:16px;
  font-size:13px;font-weight:700;color:var(--cyan);
}
.stats-strip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px;
  padding:24px 26px;border-radius:var(--radius-lg);
  background:linear-gradient(90deg,rgba(34,211,238,.08),rgba(255,107,44,.07));
  border:1px solid var(--line);
}
.stats-strip div{text-align:center;}
.stats-strip .num{display:block;font-size:26px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;}
.stats-strip .lbl{font-size:14px;color:var(--ink-2);}

/* ============ 问题分类卡 ============ */
.issue-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.issue-card{
  background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.issue-card:hover{transform:translateY(-4px);border-color:var(--line-orange);box-shadow:var(--shadow-dark);}
.issue-card .thumb{height:150px;overflow:hidden;position:relative;}
.issue-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.issue-card:hover .thumb img{transform:scale(1.06);}
.issue-card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(12,15,20,.15),rgba(12,15,20,.78));}
.issue-body{padding:22px 22px 26px;}
.issue-body h3{font-size:19px;margin-bottom:10px;}
.issue-body p{font-size:15px;color:var(--ink-2);line-height:1.85;margin-bottom:16px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:12.5px;font-weight:700;
  background:rgba(34,211,238,.1);color:#9BEFFA;border:1px solid var(--line-cyan);
}
.badge.badge-orange{background:rgba(255,107,44,.12);color:#FFBE9A;border-color:var(--line-orange);}
.badge.badge-magenta{background:rgba(229,84,214,.12);color:#F3A9EA;border-color:rgba(229,84,214,.35);}

/* ============ 清单区（浅色） ============ */
.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}
.check-block{
  background:var(--paper-2);border:1px solid var(--paper-line);border-radius:var(--radius-lg);
  padding:30px 30px 28px;box-shadow:var(--shadow-light);
}
.check-block h3{font-size:21px;color:var(--paper-ink);margin-bottom:8px;}
.check-block .sub{font-size:14.5px;color:var(--paper-sub);margin-bottom:18px;}
.check-list li{
  display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--paper-line);
  font-size:15.5px;color:#333A45;line-height:1.8;
}
.check-list li:last-child{border-bottom:0;padding-bottom:0;}
.check-list i{color:var(--orange);margin-top:5px;font-size:14px;flex-shrink:0;}

/* ============ FAQ ============ */
.faq-wrap{max-width:920px;margin:0 auto;}
.accordion{border:0;background:transparent;}
.accordion .accordion-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  margin-bottom:14px;overflow:hidden;transition:border-color .22s ease,box-shadow .22s ease;
}
.accordion .accordion-item:hover{border-color:var(--line-cyan);}
.accordion .accordion-item.is-active{border-color:var(--line-cyan);box-shadow:0 0 0 1px rgba(34,211,238,.18),var(--shadow-dark);}
.accordion .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;font-size:17px;font-weight:700;color:var(--ink);
  border:0;position:relative;transition:color .2s ease;
}
.accordion .accordion-title::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),var(--orange));opacity:0;transition:opacity .22s ease;
}
.accordion .accordion-item.is-active .accordion-title::before{opacity:1;}
.accordion .accordion-title::after{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;font-size:13px;
  color:var(--cyan);transition:transform .25s ease;flex-shrink:0;
}
.accordion .accordion-item.is-active .accordion-title::after{transform:rotate(180deg);}
.accordion .accordion-title:hover{color:var(--orange);}
.accordion .accordion-content{
  padding:0 24px 22px 24px;border:0;background:transparent;
  font-size:16px;color:var(--ink-2);line-height:1.9;
}
.accordion .accordion-content p{margin:0;}

/* ============ 反馈表单 ============ */
.feedback-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:52px;align-items:start;}
.form-card{
  background:var(--paper-2);border:1px solid var(--paper-line);border-radius:var(--radius-lg);
  padding:34px;box-shadow:var(--shadow-light);color:var(--paper-ink);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14.5px;font-weight:700;color:#2A313B;margin-bottom:8px;}
.field .hint{font-size:13px;color:var(--paper-sub);margin-top:7px;line-height:1.7;}
.field input,.field select,.field textarea{
  width:100%;min-height:50px;padding:13px 15px;
  border-radius:10px;border:1px solid var(--paper-line);background:#FBFCFD;
  color:var(--paper-ink);font-size:15.5px;line-height:1.6;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{min-height:126px;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--cyan);background:#FFFFFF;
  box-shadow:0 0 0 3px rgba(34,211,238,.18);
}
.form-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:6px;}
.form-note{font-size:13.5px;color:var(--paper-sub);}
.contact-list li{
  display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line);
}
.contact-list li:last-child{border-bottom:0;}
.contact-list .ico{
  width:42px;height:42px;border-radius:12px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(34,211,238,.1);border:1px solid var(--line-cyan);color:var(--cyan);font-size:16px;
}
.contact-list h4{font-size:16.5px;margin-bottom:4px;}
.contact-list p{font-size:14.5px;color:var(--ink-2);line-height:1.8;}

/* ============ 底部 CTA ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  padding:54px 48px;
  background:
    linear-gradient(120deg,rgba(12,15,20,.9),rgba(12,15,20,.72)),
    url("/assets/images/backpic/back-3.png") center/cover no-repeat;
  border:1px solid var(--line-cyan);
  box-shadow:var(--shadow-dark);
}
.cta-band h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px;}
.cta-band p{color:var(--ink-2);max-width:640px;margin-bottom:28px;font-size:17px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ============ 页脚 ============ */
.site-footer{background:#080B10;border-top:1px solid var(--line);position:relative;padding-top:64px;}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan),var(--orange),transparent);
  opacity:.75;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:48px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:14.5px;color:var(--ink-2);line-height:1.9;max-width:340px;}
.footer-col h4{font-size:15.5px;color:var(--ink);margin-bottom:18px;letter-spacing:.4px;}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul a{font-size:14.5px;color:var(--ink-2);}
.footer-col ul a:hover{color:var(--cyan);}
.footer-note{font-size:14px;color:var(--ink-3);line-height:1.9;}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0 30px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--ink-3);
}

/* ============ 响应式 ============ */
@media screen and (max-width:1200px){
  .main-nav a{padding:10px 11px;font-size:15px;}
  .hero-grid{gap:40px;}
}
@media screen and (max-width:1024px){
  .nav-toggle{display:flex;}
  .nav-wrap{
    position:fixed;top:76px;left:0;right:0;bottom:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(10,13,18,.98);backdrop-filter:blur(16px);
    padding:20px 22px 40px;overflow-y:auto;
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:opacity .25s ease,transform .25s ease;
    border-top:1px solid var(--line);
  }
  .nav-wrap.open{opacity:1;transform:translateY(0);pointer-events:auto;}
  .main-nav{flex-direction:column;align-items:stretch;gap:4px;}
  .main-nav a{
    min-height:52px;display:flex;align-items:center;
    padding:14px 16px;font-size:16.5px;border-radius:12px;
    border:1px solid transparent;
  }
  .main-nav a::after{display:none;}
  .main-nav a.active{
    background:rgba(34,211,238,.1);border-color:var(--line-cyan);color:var(--cyan);
  }
  .header-cta{margin-top:22px;}
  .header-cta .btn{width:100%;padding:15px 24px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-card img{height:260px;}
  .steps-grid{grid-template-columns:repeat(2,1fr);}
  .issue-grid{grid-template-columns:repeat(2,1fr);}
  .feedback-grid{grid-template-columns:1fr;gap:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media screen and (max-width:768px){
  body{font-size:16px;}
  .section{padding:64px 0;}
  .section-sm{padding:48px 0;}
  h2.sec-title{font-size:26px;}
  .hero-support{padding:60px 0 54px;}
  h1.hero-title{font-size:32px;}
  .hero-lead{font-size:16.5px;}
  .hero-meta{gap:20px;}
  .hero-meta .num{font-size:21px;}
  .check-grid{grid-template-columns:1fr;}
  .stats-strip{grid-template-columns:1fr;gap:14px;padding:22px;}
  .cta-band{padding:38px 26px;}
  .form-card{padding:26px 22px;}
  .form-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .accordion .accordion-title{padding:17px 18px;font-size:16px;}
  .accordion .accordion-content{padding:0 18px 18px 18px;font-size:15.5px;}
}
@media screen and (max-width:520px){
  .container{padding:0 18px;}
  .steps-grid{grid-template-columns:1fr;}
  .issue-grid{grid-template-columns:1fr;}
  .brand-text{font-size:17px;}
  .hero-actions .btn{width:100%;}
  .cta-actions .btn{width:100%;}
  .hero-card img{height:210px;}
  .step-card{padding:24px 20px;}
}