/* roulang page: index */
:root{
  --ink-900:#120A1E;
  --ink-800:#1B1030;
  --surface:#241636;
  --surface-2:#2E1C45;
  --line:rgba(255,255,255,.09);
  --text:#F3EFFA;
  --muted:#A79BBB;
  --brand:#3BE8B0;
  --brand-ink:#06231A;
  --accent:#FFC15E;
  --accent-2:#8B6BFF;
  --radius:16px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.75);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  padding:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
h1,h2,h3,h4{line-height:1.22;font-weight:700;color:var(--text)}
ul,ol{list-style:none}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:#4CF3C0}
img{max-width:100%;height:auto;display:block;border:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--alt{background:var(--ink-800)}
.section-head{max-width:740px;margin-bottom:48px}
.section-head h2{font-size:clamp(26px,3vw,34px);margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px;margin:0}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.16em;color:var(--brand);margin-bottom:12px;font-weight:600}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:999px;font-size:15px;font-weight:600;line-height:1.2;border:1px solid transparent;cursor:pointer;transition:transform .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease,color .2s ease}
.btn-primary{background:var(--brand);color:var(--brand-ink)}
.btn-primary:hover{background:#4CF3C0;color:var(--brand-ink);transform:translateY(-1px);box-shadow:0 14px 26px -16px rgba(59,232,176,.95)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--text);border-color:rgba(255,255,255,.22)}
.btn-ghost:hover{border-color:var(--accent-2);color:var(--text);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.badge{display:inline-block;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;background:rgba(59,232,176,.12);color:var(--brand);line-height:1.7}
.badge-accent{background:rgba(255,193,94,.14);color:var(--accent)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:var(--ink-900);border-bottom:1px solid var(--line);transition:box-shadow .25s ease}
.site-header.is-scrolled{box-shadow:0 12px 30px -20px rgba(0,0,0,.95)}
.header-inner{display:flex;align-items:center;gap:20px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--text);letter-spacing:.02em;flex:0 0 auto}
.brand:hover{color:var(--text)}
.brand-mark{width:26px;height:26px;color:var(--brand);flex:0 0 26px}
.brand-text{white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto;flex-wrap:wrap}
.nav-link{padding:8px 14px;border-radius:999px;font-size:15px;color:var(--muted);white-space:nowrap;transition:background .2s ease,color .2s ease,box-shadow .2s ease}
.nav-link:hover{background:rgba(255,255,255,.06);color:var(--text)}
.nav-link.is-active{color:var(--brand);box-shadow:inset 0 -2px 0 var(--brand)}
.header-cta{margin-left:10px;flex:0 0 auto}
.nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;background:transparent;border:1px solid var(--line);border-radius:12px;color:var(--text);cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;transition:transform .2s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:110px 0 92px;background-image:linear-gradient(180deg,rgba(18,10,30,.86),rgba(18,10,30,.97)),url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;background-repeat:no-repeat}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(circle at 18% 22%,rgba(59,232,176,.11) 0,rgba(59,232,176,0) 42%),radial-gradient(circle at 78% 12%,rgba(255,193,94,.10) 0,rgba(255,193,94,0) 38%);opacity:.9}
.hero .container{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;border:1px solid rgba(59,232,176,.35);background:rgba(59,232,176,.08);color:var(--brand);font-size:13px;margin-bottom:20px}
.hero-tag i{width:7px;height:7px;border-radius:50%;background:var(--brand);display:inline-block}
.hero h1{font-size:clamp(32px,4.4vw,52px);line-height:1.16;font-weight:700;letter-spacing:-.01em;margin-bottom:20px}
.hero-sub{color:var(--muted);font-size:17px;max-width:32em;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:38px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line)}
.hero-metrics div{min-width:96px}
.hero-metrics strong{display:block;font-size:30px;line-height:1.1;color:var(--accent);font-variant-numeric:tabular-nums;font-weight:700}
.hero-metrics strong small{font-size:14px;margin-left:3px;color:var(--accent)}
.hero-metrics span{display:block;font-size:13px;color:var(--muted);margin-top:6px}
.hero-card{position:relative;border-radius:20px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:var(--surface)}
.hero-card img{width:100%;height:320px;object-fit:cover}
.hero-card-body{padding:22px 24px}
.hero-card-body p{color:var(--muted);font-size:14px;margin-top:10px}

/* ---------- highlights ---------- */
.highlights-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.feature-list{display:flex;flex-direction:column;gap:18px}
.feature-item{display:flex;gap:18px;padding:22px 24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);transition:border-color .25s ease,transform .25s ease}
.feature-item:hover{border-color:rgba(59,232,176,.32);transform:translateY(-2px)}
.feature-icon{flex:0 0 44px;width:44px;height:44px;border:1px solid rgba(59,232,176,.42);border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--brand)}
.feature-icon svg{width:22px;height:22px}
.feature-item h3{font-size:18px;margin-bottom:6px}
.feature-item p{color:var(--muted);font-size:15px;margin:0}
.media-frame{position:relative;border-radius:20px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow)}
.media-frame img{width:100%;height:440px;object-fit:cover}
.media-tag{position:absolute;left:18px;bottom:18px;display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;background:rgba(18,10,30,.82);border:1px solid var(--line);font-size:13px;color:var(--text)}

/* ---------- demo ---------- */
.device-frame{position:relative;border:1px solid var(--line);border-radius:20px;padding:14px;background:var(--surface);box-shadow:var(--shadow)}
.device-bar{display:flex;gap:6px;margin-bottom:12px}
.device-bar span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.16)}
.device-frame img{width:100%;height:400px;object-fit:cover;border-radius:12px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:44px}
.step{position:relative;padding-top:2px}
.step::before{content:"";position:absolute;top:22px;left:58px;right:-32px;height:1px;background:var(--line)}
.step:last-child::before{display:none}
.step-dot{position:relative;z-index:1;display:inline-flex;width:44px;height:44px;border-radius:50%;align-items:center;justify-content:center;background:rgba(59,232,176,.12);border:1px solid rgba(59,232,176,.45);color:var(--brand);font-weight:700;font-size:15px;margin-bottom:18px;font-variant-numeric:tabular-nums}
.step h3{font-size:19px;margin-bottom:8px}
.step p{color:var(--muted);font-size:15px;margin:0}

/* ---------- proof ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:34px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:44px}
.stat strong{display:block;font-size:38px;line-height:1.1;color:var(--accent);font-variant-numeric:tabular-nums;font-weight:700}
.stat span{display:block;color:var(--muted);font-size:14px;margin-top:8px}
.quotes{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.quote{display:flex;gap:18px;padding:26px 28px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}
.avatar{flex:0 0 48px;width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;color:#120A1E;background:linear-gradient(135deg,#FFC15E,#3BE8B0)}
.quote p{color:var(--text);font-size:15px;margin:0 0 10px}
.quote cite{font-style:normal;color:var(--muted);font-size:13px}

/* ---------- channels ---------- */
.plans{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.plan{display:flex;flex-direction:column;padding:32px;background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}
.plan--featured{border-color:rgba(59,232,176,.55);box-shadow:0 26px 60px -34px rgba(59,232,176,.5)}
.plan-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.plan-head h3{font-size:20px}
.plan-figure{display:flex;align-items:baseline;gap:10px;margin:6px 0 22px}
.plan-figure strong{font-size:44px;line-height:1;color:var(--accent);font-variant-numeric:tabular-nums;font-weight:700}
.plan-figure span{color:var(--muted);font-size:14px}
.plan ul{display:flex;flex-direction:column;gap:12px;margin-bottom:28px}
.plan li{display:flex;gap:10px;color:var(--muted);font-size:15px;line-height:1.7}
.plan li::before{content:"✓";flex:0 0 20px;width:20px;height:20px;border-radius:50%;background:rgba(59,232,176,.14);color:var(--brand);font-size:12px;display:inline-flex;align-items:center;justify-content:center;margin-top:4px}
.plan .btn{margin-top:auto;width:100%}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:28px;align-items:start}
.news-list{display:flex;flex-direction:column;gap:16px}
.news-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);transition:border-color .25s ease,transform .25s ease;overflow:hidden}
.news-card:hover{border-color:rgba(59,232,176,.3);transform:translateY(-2px)}
.news-card>a{display:block;padding:24px;color:inherit;height:100%}
.news-card--lead>a{padding:30px}
.news-card h3{font-size:18px;line-height:1.5;margin:12px 0 10px;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card--lead h3{font-size:22px;line-height:1.45;-webkit-line-clamp:3}
.news-card p{color:var(--muted);font-size:15px;margin:0 0 18px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}
.news-meta .arrow{color:var(--brand);font-size:16px;transition:transform .2s ease}
.news-card:hover .news-meta .arrow{transform:translateX(4px)}
.news-empty{padding:34px 28px;background:var(--surface);border:1px dashed var(--line);border-radius:var(--radius);color:var(--muted);font-size:15px;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.news-empty .btn{padding:10px 20px}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line);max-width:880px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 0;font-size:17px;font-weight:600;color:var(--text);transition:color .2s ease}
.faq-item summary:hover{color:var(--brand)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:24px;line-height:1;color:var(--brand);font-weight:400;transition:transform .2s ease}
.faq-item[open] summary::after{content:"×"}
.faq-body{padding-bottom:22px;max-width:46em}
.faq-body p{color:var(--muted);font-size:15px;margin:0}

/* ---------- cta band ---------- */
.cta-band{position:relative;overflow:hidden;padding:84px 0;background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);text-align:center}
.cta-band::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(circle at 22% 30%,rgba(59,232,176,.10) 0,rgba(59,232,176,0) 40%),radial-gradient(circle at 82% 70%,rgba(139,107,255,.10) 0,rgba(139,107,255,0) 42%)}
.cta-band .container{position:relative;z-index:1}
.cta-band h2{font-size:clamp(26px,3vw,34px);margin-bottom:16px}
.cta-band p{color:var(--muted);max-width:36em;margin:0 auto 30px;font-size:16px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:64px 0 88px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{color:var(--muted);font-size:14px;max-width:26em}
.footer-col h4{font-size:14px;letter-spacing:.08em;margin-bottom:14px;color:var(--text)}
.footer-col a{display:block;color:var(--muted);font-size:14px;padding:6px 0;transition:color .2s ease}
.footer-col a:hover{color:var(--brand)}
.footer-col p{color:var(--muted);font-size:14px;padding:6px 0;margin:0}
.footer-bottom{border-top:1px solid var(--line);margin-top:48px;padding-top:24px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:13px}

/* ---------- float cta ---------- */
.float-cta{position:fixed;right:28px;bottom:28px;z-index:90;padding:14px 28px;border-radius:999px;background:var(--brand);color:var(--brand-ink);font-weight:700;font-size:15px;box-shadow:0 20px 42px -18px rgba(59,232,176,.85);opacity:0;visibility:hidden;transform:translateY(14px);transition:opacity .3s ease,transform .3s ease,visibility .3s ease,background .2s ease}
.float-cta:hover{background:#4CF3C0;color:var(--brand-ink)}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .section{padding:72px 0}
  .hero{padding:84px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-card img{height:280px}
  .highlights-grid{grid-template-columns:1fr;gap:36px}
  .media-frame img{height:360px}
  .news-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr);gap:28px}
  .plans{grid-template-columns:1fr}
  .quotes{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .main-nav{position:fixed;left:0;right:0;top:72px;bottom:0;display:none;flex-direction:column;align-items:stretch;gap:8px;padding:20px 24px 48px;background:var(--ink-900);border-top:1px solid var(--line);overflow-y:auto;margin-left:0}
  .main-nav.is-open{display:flex}
  .nav-link{padding:14px 18px;font-size:16px;border-radius:12px;background:var(--surface)}
  .nav-link.is-active{box-shadow:inset 3px 0 0 var(--brand)}
  .header-cta{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .header-inner{justify-content:space-between}
  .main-nav{margin-left:0}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  .hero{padding:64px 0 56px}
  .hero h1{font-size:clamp(28px,7vw,34px)}
  .hero-sub{font-size:16px}
  .hero-actions .btn{width:100%}
  .hero-metrics{gap:24px}
  .hero-metrics strong{font-size:26px}
  .hero-card img{height:220px}
  .device-frame img{height:240px}
  .steps{grid-template-columns:1fr;gap:26px}
  .step::before{display:none}
  .media-frame img{height:280px}
  .stats{grid-template-columns:repeat(2,1fr);gap:22px;padding:26px 0}
  .stat strong{font-size:30px}
  .news-card--lead h3{font-size:19px}
  .plan{padding:26px}
  .plan-figure strong{font-size:36px}
  .cta-band{padding:60px 0}
  .cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .site-footer{padding:48px 0 96px}
  .float-cta{left:0;right:0;bottom:0;border-radius:0;padding:16px 18px;text-align:center;background:var(--ink-800);color:var(--brand);border-top:1px solid var(--line);box-shadow:none;transform:translateY(0)}
  .float-cta:hover{background:var(--ink-800);color:var(--brand)}
  .float-cta.is-visible{transform:translateY(0)}
  .news-empty{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .hero-metrics{flex-direction:column;gap:18px;padding-top:22px}
  .hero-metrics div{min-width:0}
  .stats{grid-template-columns:1fr}
  .brand{font-size:16px}
  .brand-mark{width:22px;height:22px;flex:0 0 22px}
}

/* roulang page: article */
:root{
  --ink-900:#120A1E;
  --ink-800:#1B1030;
  --surface:#241636;
  --surface-2:#2E1C45;
  --line:rgba(255,255,255,.09);
  --text:#F3EFFA;
  --muted:#A79BBB;
  --brand:#3BE8B0;
  --brand-ink:#06231A;
  --accent:#FFC15E;
  --accent-2:#8B6BFF;
  --radius:16px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.75);
  --maxw:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease,opacity .2s ease}
a:hover{color:var(--brand)}
button{font-family:inherit;font-size:inherit;color:inherit;border:0;background:none;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:rgba(59,232,176,.28);color:#fff}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text)}
.brand-mark{width:26px;height:26px;color:var(--brand);flex:0 0 auto}
.brand-text{font-size:18px;font-weight:600;letter-spacing:.02em;white-space:nowrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:999px;font-size:15px;font-weight:600;line-height:1.2;border:1px solid transparent;transition:transform .2s ease,background-color .2s ease,border-color .2s ease,box-shadow .2s ease,color .2s ease;cursor:pointer}
.btn-primary{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.btn-primary:hover{background:#4CF3C0;color:var(--brand-ink);transform:translateY(-1px);box-shadow:0 14px 28px -14px rgba(59,232,176,.75)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--text);border-color:rgba(255,255,255,.22)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(59,232,176,.06)}
.btn-block{width:100%}
.site-header{position:sticky;top:0;z-index:60;background:var(--ink-900);border-bottom:1px solid var(--line);transition:box-shadow .25s ease}
.site-header.is-scrolled{box-shadow:0 12px 30px -22px rgba(0,0,0,.95)}
.header-inner{display:flex;align-items:center;gap:16px;height:72px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{position:relative;padding:8px 14px;border-radius:999px;font-size:15px;color:var(--muted);white-space:nowrap;transition:background-color .2s ease,color .2s ease}
.nav-link:hover{background:rgba(255,255,255,.06);color:var(--text)}
.nav-link.is-active{color:var(--brand)}
.nav-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--brand)}
.header-cta{padding:11px 22px;font-size:15px;flex:0 0 auto}
.nav-toggle{display:none;width:44px;height:44px;margin-left:8px;border:1px solid var(--line);border-radius:12px;background:var(--surface);align-items:center;justify-content:center;flex:0 0 auto}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:background-color .2s ease}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .25s ease,top .25s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{top:0;transform:rotate(45deg)}
.nav-toggle.is-open span::after{top:0;transform:rotate(-45deg)}
.article-hero{position:relative;overflow:hidden;background:var(--ink-800);border-bottom:1px solid var(--line);padding:44px 0 46px}
.article-hero::before{content:"";position:absolute;inset:0;pointer-events:none;background:
  radial-gradient(circle at 12% 22%,rgba(59,232,176,.12),transparent 45%),
  radial-gradient(circle at 82% 12%,rgba(139,107,255,.10),transparent 42%),
  radial-gradient(circle at 68% 88%,rgba(255,193,94,.07),transparent 46%);}
.article-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:26px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:rgba(255,255,255,.25)}
.breadcrumb .current{color:rgba(243,239,250,.72)}
.hero-tagline{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:rgba(59,232,176,.08);color:var(--brand);font-size:13px;font-weight:600;letter-spacing:.04em;margin-bottom:18px}
.hero-tagline .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(59,232,176,.14)}
.article-title{font-size:clamp(26px,3.4vw,34px);line-height:1.4;font-weight:700;letter-spacing:.01em;max-width:20em}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px 18px;margin-top:20px;font-size:13.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:600;line-height:1.7;background:rgba(59,232,176,.08);color:var(--brand);border:1px solid rgba(59,232,176,.22)}
.badge-amber{background:rgba(255,193,94,.1);color:var(--accent);border-color:rgba(255,193,94,.26)}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px}
.article-meta .meta-item::before{content:"";width:5px;height:5px;border-radius:50%;background:rgba(255,255,255,.22)}
.article-meta .meta-item:first-of-type::before{display:none}
.article-section{padding:64px 0 32px}
.article-shell{max-width:800px;margin:0 auto}
.article-body{font-size:17px;line-height:1.9;color:rgba(243,239,250,.92)}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.2em}
.article-body h2{font-size:22px;line-height:1.55;font-weight:600;margin:2em 0 .8em;padding-left:14px;border-left:3px solid var(--brand);color:var(--text)}
.article-body h3{font-size:19px;line-height:1.6;font-weight:600;margin:1.8em 0 .6em;color:var(--text)}
.article-body h4{font-size:17px;font-weight:600;margin:1.5em 0 .5em;color:var(--text)}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.3em}
.article-body ul li{list-style:disc;margin:.4em 0}
.article-body ol li{list-style:decimal;margin:.4em 0}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{margin:1.6em 0;padding:16px 20px;background:var(--surface);border-left:2px solid var(--accent);border-radius:0 12px 12px 0;color:rgba(243,239,250,.88)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:1.6em auto;box-shadow:var(--shadow)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:#4CF3C0}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.article-body th,.article-body td{padding:11px 14px;border:1px solid var(--line);text-align:left}
.article-body th{background:var(--surface-2);font-weight:600;color:var(--text)}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.03)}
.article-body code{background:var(--surface-2);border:1px solid var(--line);border-radius:6px;padding:2px 6px;font-size:.9em}
.article-body pre{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px 18px;overflow-x:auto;margin:1.6em 0}
.article-body pre code{background:none;border:0;padding:0}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.empty-state{max-width:640px;margin:0 auto;padding:44px 28px;text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.empty-state h2{font-size:22px;font-weight:600;margin-bottom:12px}
.empty-state p{color:var(--muted);margin-bottom:24px;font-size:16px;line-height:1.8}
.article-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:48px;padding-top:28px;border-top:1px solid var(--line)}
.article-foot .foot-note{font-size:13.5px;color:var(--muted)}
.related-section{padding:24px 0 72px}
.section-head{max-width:800px;margin:0 auto 28px}
.section-head h2{font-size:26px;line-height:1.4;font-weight:600}
.section-head p{color:var(--muted);font-size:15px;margin-top:8px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;max-width:800px;margin:0 auto}
.related-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .22s ease,border-color .22s ease}
.related-card:hover{transform:translateY(-2px);border-color:rgba(59,232,176,.3)}
.related-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--surface-2)}
.related-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.related-card:hover .thumb img{transform:scale(1.03)}
.related-card .card-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.related-card .card-body h3{font-size:16px;line-height:1.55;font-weight:600}
.related-card .card-body span{font-size:12.5px;color:var(--muted);margin-top:auto;font-variant-numeric:tabular-nums}
.cta-band{position:relative;overflow:hidden;background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:64px 0}
.cta-band::before{content:"";position:absolute;inset:0;pointer-events:none;background:
  radial-gradient(circle at 20% 30%,rgba(59,232,176,.10),transparent 45%),
  radial-gradient(circle at 78% 70%,rgba(139,107,255,.10),transparent 48%);}
.cta-inner{position:relative;z-index:1;max-width:720px;margin:0 auto;text-align:center}
.cta-inner h2{font-size:clamp(24px,3vw,30px);line-height:1.4;font-weight:600}
.cta-inner p{color:var(--muted);margin:14px auto 28px;max-width:520px;font-size:16px;line-height:1.8}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:64px 0 32px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px 32px}
.footer-brand p{color:var(--muted);font-size:14.5px;line-height:1.85;margin-top:16px;max-width:26em}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text);letter-spacing:.04em;margin-bottom:16px}
.footer-col a,.footer-col p{display:block;color:var(--muted);font-size:14.5px;line-height:1.9;margin-bottom:8px}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 24px;margin-top:48px;padding-top:24px;border-top:1px solid var(--line);font-size:13px;color:rgba(167,155,187,.85);font-variant-numeric:tabular-nums}
@media (max-width:1023px){
  .header-inner{height:68px;gap:12px}
  .main-nav{position:fixed;top:68px;left:0;right:0;bottom:0;display:none;flex-direction:column;align-items:stretch;gap:6px;margin:0;padding:20px 24px 40px;background:var(--ink-900);border-top:1px solid var(--line);overflow-y:auto;z-index:59}
  .main-nav.is-open{display:flex}
  .nav-link{padding:14px 16px;font-size:16.5px;border-radius:12px;border-bottom:1px solid var(--line);color:var(--text)}
  .nav-link.is-active::after{display:none}
  .nav-link.is-active{background:rgba(59,232,176,.08)}
  .nav-toggle{display:inline-flex}
  .header-cta{padding:9px 18px;font-size:14px}
  .article-section{padding:52px 0 24px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 24px}
  .site-footer{padding:52px 0 28px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 18px}
  .brand-text{font-size:16px}
  .brand-mark{width:23px;height:23px}
  .article-hero{padding:32px 0 34px}
  .breadcrumb{margin-bottom:20px;font-size:12.5px}
  .article-title{font-size:26px;line-height:1.42}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:20px}
  .article-body h3{font-size:17.5px}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
  .related-grid{grid-template-columns:1fr;gap:18px}
  .cta-band{padding:48px 0}
  .cta-actions .btn{width:100%}
}
@media (max-width:519px){
  .header-inner{height:64px;gap:8px}
  .main-nav{top:64px;padding:16px 18px 32px}
  .header-cta{padding:8px 14px;font-size:13px}
  .nav-toggle{width:40px;height:40px}
  .brand-text{font-size:15px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .article-meta{gap:8px 14px;font-size:13px}
  .article-foot{flex-direction:column;align-items:flex-start}
  .article-foot .btn{width:100%}
}

/* roulang page: category1 */
:root{
  --ink-900:#120A1E;
  --ink-800:#1B1030;
  --surface:#241636;
  --surface-2:#2E1C45;
  --line:rgba(255,255,255,.09);
  --text:#F3EFFA;
  --muted:#A79BBB;
  --brand:#3BE8B0;
  --brand-ink:#06231A;
  --accent:#FFC15E;
  --accent-2:#8B6BFF;
  --radius:16px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.75);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
body, h1, h2, h3, h4, p, ul, ol, li, figure{margin:0;padding:0}
h1,h2,h3,h4{font-weight:600;line-height:1.3;color:var(--text)}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;border-radius:var(--radius)}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,2.6vw,34px);margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;
  color:var(--brand);background:rgba(59,232,176,.08);
  border:1px solid rgba(59,232,176,.22);
  padding:6px 14px;border-radius:999px;margin-bottom:20px;
}
.eyebrow--amber{color:var(--accent);background:rgba(255,193,94,.08);border-color:rgba(255,193,94,.26)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--ink-900);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 14px 30px -22px rgba(0,0,0,.95)}
.header-inner{display:flex;align-items:center;gap:14px;height:72px}
.brand{display:inline-flex;align-items:center;gap:9px;flex:none}
.brand-mark{width:24px;height:24px;flex:none;color:var(--brand)}
.brand-text{font-size:18px;font-weight:600;letter-spacing:.04em;color:var(--text)}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 14px;border-radius:999px;
  font-size:14px;color:var(--muted);
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{background:rgba(255,255,255,.06);color:var(--text)}
.nav-link.is-active{color:var(--brand)}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;
  border-radius:2px;background:var(--brand);
}
.header-cta{margin-left:10px;flex:none;padding:11px 22px;font-size:14px}
.nav-toggle{
  display:none;width:40px;height:40px;flex:none;
  border-radius:12px;border:1px solid var(--line);background:var(--surface);
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:background .2s ease}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .22s ease,top .22s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;border:1px solid transparent;
  padding:13px 26px;font-size:15px;font-weight:600;line-height:1.2;
  cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--brand);color:var(--brand-ink);box-shadow:0 14px 30px -18px rgba(59,232,176,.9)}
.btn-primary:hover{background:#4CF3C0;transform:translateY(-1px);box-shadow:0 18px 34px -18px rgba(59,232,176,.95)}
.btn-primary:active{transform:none;box-shadow:0 8px 20px -16px rgba(59,232,176,.8)}
.btn-ghost{border-color:var(--line);color:var(--text);background:transparent}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-block{width:100%}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:84px 0 68px;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(18,10,30,.86),rgba(18,10,30,.96)),
             url("/assets/images/backpic/back-1.png") center/cover no-repeat;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(circle at 16% 24%,rgba(255,193,94,.12),transparent 30%),
    radial-gradient(circle at 84% 12%,rgba(59,232,176,.10),transparent 28%);
}
.page-hero .container{position:relative;z-index:1}
.page-hero h1{
  font-size:clamp(30px,4.4vw,50px);
  line-height:1.16;
  font-weight:700;
  letter-spacing:-.01em;
  max-width:15em;
  margin-bottom:20px;
}
.page-hero .lead{
  color:var(--muted);
  font-size:17px;
  max-width:640px;
  margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.anchor-nav{display:flex;flex-wrap:wrap;gap:10px}
.anchor-nav a{
  display:inline-block;padding:8px 18px;border-radius:999px;
  font-size:14px;color:var(--muted);
  border:1px solid var(--line);background:rgba(36,22,54,.7);
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.anchor-nav a:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.point-list{display:grid;gap:22px;margin-top:8px}
.point-item{display:flex;gap:16px}
.num-box{
  flex:none;width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,193,94,.3);background:rgba(255,193,94,.08);
  color:var(--accent);font-size:15px;font-weight:600;
}
.point-item h3{font-size:18px;margin-bottom:6px}
.point-item p{color:var(--muted);font-size:15px;line-height:1.85}
.figure-wrap{position:relative}
.figure-wrap img{width:100%;height:100%;min-height:320px;object-fit:cover;border:1px solid var(--line);box-shadow:var(--shadow)}
.figure-badge{
  position:absolute;left:20px;bottom:20px;
  padding:8px 16px;border-radius:999px;font-size:13px;
  background:rgba(18,10,30,.9);border:1px solid var(--line);color:var(--text);
}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:12px}
.step{
  position:relative;padding:26px 22px 22px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);
  transition:border-color .25s ease,transform .25s ease;
}
.step:hover{border-color:rgba(59,232,176,.32);transform:translateY(-2px)}
.step-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:50%;
  background:rgba(59,232,176,.1);border:1px solid rgba(59,232,176,.3);
  color:var(--brand);font-size:14px;font-weight:600;margin-bottom:16px;
}
.step h3{font-size:18px;margin-bottom:8px}
.step p{color:var(--muted);font-size:14.5px;line-height:1.8}
.step::after{
  content:"";position:absolute;top:44px;right:-24px;width:24px;height:1px;
  background:linear-gradient(90deg,rgba(59,232,176,.5),transparent);
}
.step:last-child::after{display:none}

/* ---------- stats ---------- */
.stat-band{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{padding:26px 22px;border-left:2px solid rgba(59,232,176,.35);background:rgba(36,22,54,.55);border-radius:0 var(--radius) var(--radius) 0}
.stat-num{font-size:36px;font-weight:700;color:var(--accent);line-height:1.1;margin-bottom:6px}
.stat-num small{font-size:14px;font-weight:500;color:var(--muted);margin-left:6px}
.stat p{color:var(--muted);font-size:14px}

/* ---------- device compare ---------- */
.device-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.device-card{
  padding:30px 28px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);
  transition:border-color .25s ease,transform .25s ease;
}
.device-card:hover{border-color:rgba(139,107,255,.38);transform:translateY(-2px)}
.device-card h3{font-size:20px;margin-bottom:6px}
.device-card .tag{
  display:inline-block;font-size:12px;padding:4px 12px;border-radius:999px;
  background:rgba(255,193,94,.1);color:var(--accent);margin-bottom:16px;
}
.check-list{display:grid;gap:12px}
.check-list li{position:relative;padding-left:26px;color:var(--muted);font-size:15px;line-height:1.8}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:9px;height:9px;
  border-radius:3px;background:var(--brand);opacity:.85;
}
.inline-note{margin-top:28px;color:var(--muted);font-size:15px}
.inline-note a{color:var(--brand);border-bottom:1px solid rgba(59,232,176,.4);padding-bottom:1px}
.inline-note a:hover{color:#4CF3C0}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  width:100%;padding:22px 4px;text-align:left;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--text);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand)}
.faq-icon{
  position:relative;flex:none;width:22px;height:22px;border-radius:50%;
  border:1px solid var(--line);transition:border-color .2s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);
  transform:translate(-50%,-50%);border-radius:2px;transition:transform .25s ease,opacity .25s ease;
}
.faq-icon::before{width:10px;height:1.6px}
.faq-icon::after{width:1.6px;height:10px}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease}
.faq-a > div{overflow:hidden}
.faq-a p{color:var(--muted);font-size:15.5px;padding:0 4px 22px;max-width:760px}
.faq-item.is-open .faq-a{grid-template-rows:1fr}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink-800);border-top:1px solid var(--line);
  padding:80px 0;text-align:center;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(circle at 22% 30%,rgba(59,232,176,.10),transparent 34%),
    radial-gradient(circle at 78% 70%,rgba(255,193,94,.10),transparent 34%);
}
.cta-band .container{position:relative;z-index:1}
.cta-band h2{font-size:clamp(24px,2.8vw,34px);margin-bottom:14px}
.cta-band p{color:var(--muted);max-width:620px;margin:0 auto 28px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{color:var(--muted);font-size:14px;line-height:1.9;max-width:36ch}
.footer-col h4{font-size:15px;margin-bottom:14px;color:var(--text)}
.footer-col a{display:block;color:var(--muted);font-size:14px;padding:5px 0;transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:var(--brand);transform:translateX(2px)}
.footer-col p{color:var(--muted);font-size:14px;margin-bottom:6px}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  border-top:1px solid var(--line);margin-top:48px;padding:24px 0 32px;
  font-size:13px;color:var(--muted);
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .section{padding:72px 0}
  .page-hero{padding:64px 0 56px}
  .split{grid-template-columns:1fr;gap:36px}
  .figure-wrap img{min-height:260px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step::after{display:none}
  .stat-band{grid-template-columns:repeat(2,1fr)}
  .device-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .main-nav{
    position:fixed;left:0;right:0;top:72px;bottom:0;
    margin:0;padding:22px 24px 40px;
    flex-direction:column;align-items:stretch;gap:8px;
    background:var(--ink-900);
    border-top:1px solid var(--line);
    overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
  }
  .main-nav.is-open{opacity:1;visibility:visible;transform:none}
  .nav-link{
    padding:15px 18px;font-size:16px;border-radius:12px;
    background:var(--surface);border:1px solid var(--line);
  }
  .nav-link.is-active{color:var(--brand);border-color:rgba(59,232,176,.35)}
  .nav-link.is-active::after{display:none}
  .nav-toggle{display:inline-flex}
  .header-cta{margin-left:auto;padding:9px 16px;font-size:13px}
  .header-inner{gap:10px}
}
@media (max-width:640px){
  .section{padding:56px 0}
  .container{padding:0 18px}
  .page-hero{padding:52px 0 46px}
  .page-hero h1{font-size:30px;line-height:1.22}
  .page-hero .lead{font-size:16px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .steps{grid-template-columns:1fr}
  .stat-band{grid-template-columns:1fr}
  .stat{padding:20px 18px}
  .stat-num{font-size:30px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;font-size:12px}
  .faq-q{font-size:15.5px}
  .brand-text{font-size:16px}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
}

/* roulang page: category2 */
:root{
  --ink-900:#120A1E;
  --ink-800:#1B1030;
  --surface:#241636;
  --surface-2:#2E1C45;
  --line:rgba(255,255,255,0.09);
  --text:#F3EFFA;
  --muted:#A79BBB;
  --brand:#3BE8B0;
  --brand-hover:#4CF3C0;
  --brand-ink:#06231A;
  --accent:#FFC15E;
  --accent-2:#8B6BFF;
  --radius-card:16px;
  --radius-input:12px;
  --radius-pill:999px;
  --shadow-card:0 18px 40px -22px rgba(0,0,0,.75);
  --shadow-lift:0 26px 52px -24px rgba(0,0,0,.9);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.2px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-hover)}
img{display:block;max-width:100%;height:auto}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:200;
  background:var(--ink-900);
  border-bottom:1px solid var(--line);
  transition:box-shadow .28s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 14px 34px -20px rgba(0,0,0,.95)}
.header-inner{display:flex;align-items:center;gap:24px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);flex:0 0 auto}
.brand:hover{color:var(--text)}
.brand-mark{width:26px;height:26px;color:var(--brand);flex:0 0 auto;transition:transform .4s var(--ease)}
.brand:hover .brand-mark{transform:rotate(72deg)}
.brand-text{font-size:18px;font-weight:600;letter-spacing:.6px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto;flex-wrap:nowrap}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 13px;border-radius:var(--radius-pill);
  color:var(--muted);font-size:15px;line-height:1.5;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-link:hover{background:rgba(255,255,255,.06);color:var(--text)}
.nav-link.is-active{color:var(--brand);background:rgba(59,232,176,.08)}
.nav-link.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;
  border-radius:2px;background:var(--brand);
}
.header-cta{flex:0 0 auto}
.nav-toggle{
  display:none;position:relative;width:42px;height:42px;flex:0 0 auto;
  background:transparent;border:1px solid var(--line);border-radius:12px;
  cursor:pointer;transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(59,232,176,.45);background:rgba(255,255,255,.04)}
.nav-toggle span{position:absolute;left:11px;right:11px;top:50%;height:2px;background:var(--text);transform:translateY(-50%);transition:background .2s var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;right:0;height:2px;background:var(--text);transition:transform .25s var(--ease),top .25s var(--ease)}
.nav-toggle span::before{top:-7px}
.nav-toggle span::after{top:7px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;line-height:1.4;letter-spacing:.4px;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{background:var(--brand);color:var(--brand-ink);box-shadow:0 14px 30px -18px rgba(59,232,176,.9)}
.btn-primary:hover{background:var(--brand-hover);color:var(--brand-ink);transform:translateY(-1px);box-shadow:0 20px 36px -18px rgba(59,232,176,.95)}
.btn-primary:active{transform:translateY(0);box-shadow:0 8px 20px -16px rgba(59,232,176,.9)}
.btn-ghost{background:transparent;color:var(--text);border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{padding:9px 18px;font-size:13px}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:104px 0 84px;
  background-color:var(--ink-800);
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(115deg,rgba(18,10,30,.94) 0%,rgba(18,10,30,.86) 46%,rgba(27,16,48,.72) 100%),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:1;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(1.6px 1.6px at 18% 24%,rgba(255,255,255,.85),transparent 60%),
                   radial-gradient(1.4px 1.4px at 68% 18%,rgba(59,232,176,.9),transparent 60%),
                   radial-gradient(1.6px 1.6px at 84% 62%,rgba(255,193,94,.8),transparent 60%),
                   radial-gradient(1.2px 1.2px at 34% 76%,rgba(255,255,255,.6),transparent 60%);
  opacity:.12;
}
.hero-inner{position:relative;z-index:1;max-width:860px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:1.6px;color:var(--brand);
  background:rgba(59,232,176,.1);border:1px solid rgba(59,232,176,.24);
  padding:6px 16px;border-radius:var(--radius-pill);margin-bottom:22px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(59,232,176,.16)}
.page-hero h1{
  font-size:clamp(30px,4.4vw,52px);line-height:1.16;font-weight:700;letter-spacing:.5px;
  margin-bottom:20px;
}
.page-hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{font-size:17px;line-height:1.9;color:var(--muted);max-width:640px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px}
.pill-nav{display:flex;flex-wrap:wrap;gap:10px;padding-top:26px;border-top:1px solid rgba(255,255,255,.1)}
.pill-nav a{
  display:inline-block;padding:8px 18px;border-radius:var(--radius-pill);
  font-size:14px;color:var(--muted);background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.pill-nav a:hover{background:rgba(59,232,176,.12);color:var(--brand);border-color:rgba(59,232,176,.4);transform:translateY(-1px)}

/* ---------- section heading ---------- */
.section-head{max-width:760px;margin-bottom:52px}
.section-tag{
  display:inline-block;font-size:12px;letter-spacing:2px;color:var(--accent);
  border:1px solid rgba(255,193,94,.32);background:rgba(255,193,94,.08);
  padding:4px 14px;border-radius:var(--radius-pill);margin-bottom:16px;
}
.section-head h2{font-size:clamp(24px,3vw,34px);line-height:1.3;font-weight:600;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px;line-height:1.9;max-width:640px}

/* ---------- timeline ---------- */
.timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:8px}
.timeline::before{
  content:"";position:absolute;top:23px;left:12.5%;right:12.5%;height:2px;
  background:linear-gradient(90deg,rgba(59,232,176,.65),rgba(139,107,255,.35),rgba(255,255,255,.08));
}
.tl-item{position:relative;padding:0 6px}
.tl-dot{
  position:relative;z-index:1;width:46px;height:46px;margin:0 auto 22px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;background:var(--ink-900);border:2px solid var(--brand);
  color:var(--brand);font-size:16px;font-weight:700;
  font-variant-numeric:tabular-nums;
  transition:box-shadow .25s var(--ease),background .25s var(--ease),color .25s var(--ease);
}
.tl-item:hover .tl-dot{background:rgba(59,232,176,.12);box-shadow:0 0 0 6px rgba(59,232,176,.08)}
.tl-item h3{font-size:19px;font-weight:600;line-height:1.45;text-align:center;margin-bottom:10px}
.tl-item p{font-size:14.5px;line-height:1.85;color:var(--muted);text-align:center}
.tl-meta{
  display:block;margin-top:14px;text-align:center;
  font-size:12.5px;color:var(--accent);letter-spacing:.6px;
  font-variant-numeric:tabular-nums;
}

/* ---------- split feature ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.split-body h2{font-size:clamp(24px,3vw,34px);line-height:1.3;font-weight:600;margin-bottom:18px}
.split-body > p{color:var(--muted);margin-bottom:28px;max-width:560px}
.check-list li{
  position:relative;padding-left:34px;margin-bottom:18px;
  font-size:15.5px;line-height:1.8;
}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:18px;height:18px;
  border-radius:6px;border:1px solid rgba(59,232,176,.5);background:rgba(59,232,176,.12);
}
.check-list li::after{
  content:"";position:absolute;left:6px;top:14px;width:6px;height:10px;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(40deg);
}
.check-list li strong{display:block;color:var(--text);font-weight:600;margin-bottom:2px}
.check-list li span{color:var(--muted);font-size:14.5px}
.split-figure{position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card)}
.split-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;transition:transform .5s var(--ease)}
.split-figure:hover img{transform:scale(1.02)}
.figure-badge{
  position:absolute;left:18px;bottom:18px;
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:var(--radius-pill);
  background:rgba(18,10,30,.88);border:1px solid rgba(59,232,176,.4);
  color:var(--brand);font-size:13px;letter-spacing:.4px;
}

/* ---------- compare ---------- */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-card{
  padding:30px 28px;border-radius:var(--radius-card);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.compare-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift)}
.compare-card.is-good{border-color:rgba(59,232,176,.32)}
.compare-card.is-bad{border-color:rgba(255,193,94,.24)}
.compare-head{display:flex;align-items:center;gap:12px;margin-bottom:22px}
.compare-icon{
  width:38px;height:38px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;flex:0 0 auto;
}
.is-good .compare-icon{background:rgba(59,232,176,.14);color:var(--brand);border:1px solid rgba(59,232,176,.36)}
.is-bad .compare-icon{background:rgba(255,193,94,.12);color:var(--accent);border:1px solid rgba(255,193,94,.32)}
.compare-head h3{font-size:20px;font-weight:600}
.compare-card ul li{
  position:relative;padding-left:24px;margin-bottom:14px;
  font-size:15px;line-height:1.8;color:var(--muted);
}
.compare-card ul li:last-child{margin-bottom:0}
.compare-card ul li::before{
  content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:2px;
  transform:rotate(45deg);
}
.is-good ul li::before{background:var(--brand)}
.is-bad ul li::before{background:var(--accent)}

/* ---------- news strip ---------- */
.link-strip{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  margin-top:36px;padding:22px 28px;border-radius:var(--radius-card);
  background:var(--surface-2);border:1px solid var(--line);
  transition:border-color .25s var(--ease),background .25s var(--ease),transform .25s var(--ease);
}
.link-strip:hover{border-color:rgba(59,232,176,.4);transform:translateY(-2px)}
.link-strip .ls-text{display:flex;flex-direction:column;gap:4px}
.link-strip .ls-text b{font-size:17px;font-weight:600;color:var(--text)}
.link-strip .ls-text span{font-size:14px;color:var(--muted)}
.link-strip .ls-arrow{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-size:14px;font-weight:600;white-space:nowrap}

/* ---------- stats ---------- */
.stats-band{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:38px 34px;border-radius:var(--radius-card);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.stat-item{text-align:left}
.stat-num{
  font-size:36px;line-height:1.1;font-weight:700;color:var(--accent);
  font-variant-numeric:tabular-nums;letter-spacing:-.5px;
}
.stat-num small{font-size:15px;font-weight:600;margin-left:3px;color:var(--accent);letter-spacing:0}
.stat-label{margin-top:8px;font-size:13.5px;color:var(--muted);line-height:1.7}

/* ---------- faq ---------- */
.faq-list{max-width:860px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 4px;background:transparent;border:0;cursor:pointer;
  text-align:left;color:var(--text);font-size:17px;font-weight:600;line-height:1.6;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{
  position:relative;flex:0 0 auto;width:24px;height:24px;border-radius:50%;
  border:1px solid var(--line);transition:border-color .25s var(--ease),transform .25s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--brand);
  transform:translate(-50%,-50%);transition:opacity .25s var(--ease),transform .25s var(--ease);
}
.faq-icon::before{width:11px;height:2px}
.faq-icon::after{width:2px;height:11px}
.faq-item.is-open .faq-icon{border-color:rgba(59,232,176,.55);transform:rotate(90deg)}
.faq-item.is-open .faq-icon::after{opacity:0;transform:translate(-50%,-50%) scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s var(--ease)}
.faq-a p{padding:0 4px 24px;color:var(--muted);font-size:15.5px;line-height:1.9;max-width:720px}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;
  padding:78px 0;text-align:center;
  background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(1.6px 1.6px at 22% 32%,rgba(255,255,255,.8),transparent 60%),
                   radial-gradient(1.5px 1.5px at 74% 26%,rgba(59,232,176,.9),transparent 60%),
                   radial-gradient(1.4px 1.4px at 58% 78%,rgba(255,193,94,.8),transparent 60%);
  opacity:.12;
}
.cta-band .container{position:relative;z-index:1}
.cta-band h2{font-size:clamp(24px,3.2vw,34px);font-weight:600;line-height:1.35;margin-bottom:16px}
.cta-band p{color:var(--muted);max-width:560px;margin:0 auto 30px}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:72px 0 80px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{color:var(--muted);font-size:14.5px;line-height:1.9;max-width:320px}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--text);letter-spacing:.6px}
.footer-col a,.footer-col p{display:block;color:var(--muted);font-size:14px;line-height:1.9;margin-bottom:10px;transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:52px;padding-top:24px;border-top:1px solid var(--line);
  color:var(--muted);font-size:13px;
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .section{padding:72px 0}
  .header-inner{gap:14px}
  .main-nav{
    position:fixed;left:0;right:0;top:72px;bottom:0;
    flex-direction:column;align-items:stretch;gap:6px;
    padding:22px 24px 40px;margin-left:0;
    background:var(--ink-800);border-top:1px solid var(--line);
    overflow-y:auto;
    opacity:0;transform:translateY(-10px);pointer-events:none;
    transition:opacity .26s var(--ease),transform .26s var(--ease);
  }
  .main-nav.is-open{opacity:1;transform:none;pointer-events:auto}
  .nav-link{width:100%;padding:14px 16px;font-size:16px;border-radius:12px}
  .nav-link.is-active::after{left:16px;right:16px;bottom:8px}
  .nav-toggle{display:block;margin-left:auto}
  .header-cta{padding:10px 18px;font-size:14px}
  .page-hero{padding:76px 0 64px}
  .timeline{grid-template-columns:repeat(2,1fr);gap:34px 24px}
  .timeline::before{display:none}
  .split{grid-template-columns:1fr;gap:36px}
  .split-figure{order:-1}
  .compare-grid{grid-template-columns:1fr}
  .stats-band{grid-template-columns:repeat(2,1fr);gap:28px 24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  .page-hero{padding:60px 0 52px}
  .hero-sub{font-size:16px}
  .hero-actions .btn{width:100%}
  .pill-nav{gap:8px}
  .pill-nav a{font-size:13px;padding:7px 14px}
  .timeline{grid-template-columns:1fr;gap:0}
  .tl-item{display:grid;grid-template-columns:46px 1fr;column-gap:18px;padding:0 0 30px}
  .tl-item:last-child{padding-bottom:0}
  .tl-dot{margin:0;width:42px;height:42px}
  .tl-item h3{text-align:left;margin-top:8px;grid-column:2}
  .tl-item p{text-align:left;grid-column:2}
  .tl-meta{text-align:left;grid-column:2;margin-top:8px}
  .tl-item::before{
    content:"";position:absolute;left:20px;top:46px;bottom:4px;width:2px;
    background:linear-gradient(180deg,rgba(59,232,176,.4),rgba(255,255,255,.06));
  }
  .tl-item:last-child::before{display:none}
  .link-strip{flex-direction:column;align-items:flex-start;gap:14px}
  .stats-band{grid-template-columns:1fr;gap:22px;padding:30px 24px}
  .stat-num{font-size:32px}
  .cta-band{padding:60px 0}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column}
  .site-footer{padding:52px 0 64px}
}
@media (max-width:519px){
  .container{padding:0 18px}
  .brand-text{font-size:16px}
  .brand-mark{width:22px;height:22px}
  .header-inner{gap:10px;min-height:64px}
  .header-cta{padding:8px 13px;font-size:12.5px;letter-spacing:.2px}
  .main-nav{top:64px}
  .faq-q{font-size:15.5px;padding:20px 2px}
  .compare-card{padding:24px 20px}
}

/* roulang page: category3 */
:root{
  --ink-900:#120A1E;
  --ink-800:#1B1030;
  --surface:#241636;
  --surface-2:#2E1C45;
  --line:rgba(255,255,255,.09);
  --text:#F3EFFA;
  --muted:#A79BBB;
  --brand:#3BE8B0;
  --brand-hi:#4CF3C0;
  --brand-ink:#06231A;
  --accent:#FFC15E;
  --accent-2:#8B6BFF;
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.75);
  --container:1180px;
  --section-y:96px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:var(--brand-hi);}
img{max-width:100%;height:auto;display:block;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.num{font-variant-numeric:tabular-nums;}

/* ============ header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--ink-900);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 12px 30px -18px rgba(0,0,0,.9);}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  flex-shrink:0;
}
.brand:hover{color:var(--text);}
.brand-mark{
  width:26px;
  height:26px;
  color:var(--brand);
  flex-shrink:0;
}
.brand-text{font-size:18px;font-weight:600;letter-spacing:.5px;white-space:nowrap;}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
  flex-wrap:nowrap;
}
.nav-link{
  display:inline-flex;
  align-items:center;
  padding:8px 14px;
  border-radius:999px;
  font-size:15px;
  color:var(--muted);
  white-space:nowrap;
  transition:background .2s ease,color .2s ease;
}
.nav-link:hover{background:rgba(255,255,255,.06);color:var(--text);}
.nav-link.is-active{
  color:var(--brand);
  background:rgba(59,232,176,.08);
  box-shadow:inset 0 -2px 0 var(--brand);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  transition:transform .18s ease,background .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{background:var(--brand);color:var(--brand-ink);}
.btn-primary:hover{background:var(--brand-hi);color:var(--brand-ink);transform:translateY(-1px);box-shadow:0 14px 28px -16px rgba(59,232,176,.9);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:transparent;color:var(--text);border-color:rgba(255,255,255,.24);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-outline{background:transparent;color:var(--brand);border-color:rgba(59,232,176,.55);}
.btn-outline:hover{background:rgba(59,232,176,.1);color:var(--brand-hi);}
.header-cta{padding:11px 22px;flex-shrink:0;}
.nav-toggle{
  display:none;
  width:42px;
  height:42px;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--surface);
  position:relative;
  margin-left:auto;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;
  left:50%;
  width:18px;
  height:2px;
  background:var(--text);
  border-radius:2px;
  transform:translateX(-50%);
  transition:transform .2s ease,opacity .2s ease;
  content:"";
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-6px;left:0;transform:none;}
.nav-toggle span::after{top:6px;left:0;transform:none;}

/* ============ hero ============ */
.page-hero{
  position:relative;
  padding:74px 0 80px;
  background-image:linear-gradient(180deg,rgba(18,10,30,.82) 0%,rgba(18,10,30,.94) 62%,var(--ink-900) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:radial-gradient(680px 320px at 82% 18%,rgba(139,107,255,.12),transparent 70%),
             radial-gradient(520px 260px at 12% 82%,rgba(59,232,176,.10),transparent 72%);
}
.hero-grid{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);
  gap:56px;
  align-items:center;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  font-size:13px;
  letter-spacing:.4px;
  color:var(--brand);
  background:rgba(59,232,176,.1);
  border:1px solid rgba(59,232,176,.24);
  margin-bottom:20px;
}
.page-hero h1{
  font-size:46px;
  line-height:1.16;
  font-weight:700;
  letter-spacing:-.5px;
}
.lead{
  margin-top:20px;
  font-size:17px;
  line-height:1.9;
  color:var(--muted);
  max-width:34em;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:30px;
}
.anchor-pills{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:30px;
}
.anchor-pills a{
  display:inline-flex;
  align-items:center;
  padding:8px 16px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  font-size:14px;
  color:var(--muted);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.anchor-pills a:hover{border-color:rgba(59,232,176,.55);color:var(--brand);background:rgba(59,232,176,.07);}
.hero-figure{
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--surface);
  box-shadow:var(--shadow);
}
.hero-figure img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
}
.hero-figure figcaption{
  padding:12px 18px;
  font-size:13px;
  color:var(--muted);
  border-top:1px solid var(--line);
}

/* ============ section common ============ */
.section{padding:var(--section-y) 0;}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:660px;margin-bottom:44px;}
.section-tag{
  display:inline-block;
  font-size:13px;
  letter-spacing:.6px;
  color:var(--accent);
  background:rgba(255,193,94,.1);
  border-radius:999px;
  padding:4px 12px;
  margin-bottom:14px;
}
.section-title{font-size:32px;line-height:1.3;font-weight:600;}
.section-desc{margin-top:14px;color:var(--muted);font-size:16px;line-height:1.9;}

/* ============ dual cards ============ */
.dual-cards{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.info-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px;
  box-shadow:var(--shadow);
  transition:border-color .22s ease,transform .22s ease;
}
.info-card:hover{border-color:rgba(59,232,176,.45);transform:translateY(-2px);}
.card-icon{
  width:46px;
  height:46px;
  border-radius:12px;
  border:1px solid rgba(139,107,255,.5);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--brand);
  margin-bottom:18px;
  background:rgba(139,107,255,.08);
}
.card-icon svg{width:22px;height:22px;}
.info-card h3{font-size:21px;font-weight:600;margin-bottom:10px;}
.info-card p{color:var(--muted);font-size:15.5px;line-height:1.85;}
.card-list{margin-top:18px;display:grid;gap:10px;}
.card-list li{
  position:relative;
  padding-left:20px;
  color:var(--text);
  font-size:15px;
  line-height:1.75;
}
.card-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:.68em;
  width:8px;
  height:8px;
  border-radius:2px;
  background:var(--brand);
  transform:rotate(45deg);
}
.card-note{
  margin-top:18px;
  padding-top:16px;
  border-top:1px dashed var(--line);
  font-size:13.5px;
  color:var(--muted);
}

/* ============ compare table ============ */
.table-wrap{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface);
  overflow-x:auto;
  box-shadow:var(--shadow);
}
table.compare{
  width:100%;
  min-width:660px;
  border-collapse:collapse;
  margin:0;
  background:transparent;
  color:var(--text);
  font-size:15px;
}
table.compare caption{
  caption-side:top;
  text-align:left;
  padding:20px 24px 8px;
  font-size:14px;
  color:var(--muted);
}
table.compare thead th{
  background:var(--surface-2);
  color:var(--text);
  font-size:14px;
  font-weight:600;
  letter-spacing:.3px;
  padding:16px 20px;
  border-bottom:1px solid var(--line);
  text-align:left;
  white-space:nowrap;
}
table.compare thead th:first-child{color:var(--muted);}
table.compare thead th mark{
  background:rgba(255,193,94,.14);
  color:var(--accent);
  border-radius:6px;
  padding:2px 8px;
  font-size:13px;
  margin-left:6px;
}
table.compare tbody td{
  padding:15px 20px;
  border-bottom:1px solid var(--line);
  line-height:1.7;
  vertical-align:top;
}
table.compare tbody tr:nth-child(even) td{background:rgba(255,255,255,.022);}
table.compare tbody tr:last-child td{border-bottom:none;}
table.compare tbody td:first-child{
  color:var(--text);
  font-weight:600;
  white-space:nowrap;
  width:22%;
}
table.compare tbody td{color:var(--muted);}
.table-hint{margin-top:14px;font-size:13.5px;color:var(--muted);}

/* ============ stats band ============ */
.stats-band{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
}
.stat-item{
  background:var(--ink-800);
  padding:30px 24px;
}
.stat-num{
  font-size:38px;
  font-weight:700;
  line-height:1.1;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
}
.stat-num small{font-size:15px;font-weight:600;margin-left:4px;color:var(--accent);}
.stat-label{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.7;}

/* ============ steps ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
  counter-reset:step;
}
.step{
  position:relative;
  padding:26px 24px 26px 24px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface);
  transition:border-color .22s ease,transform .22s ease;
}
.step:hover{border-color:rgba(59,232,176,.45);transform:translateY(-2px);}
.step::after{
  content:"";
  position:absolute;
  top:44px;
  right:-24px;
  width:24px;
  height:1px;
  background:var(--line);
}
.step:last-child::after{display:none;}
.step-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border-radius:999px;
  border:1px solid rgba(59,232,176,.5);
  color:var(--brand);
  font-size:14px;
  font-weight:600;
  font-variant-numeric:tabular-nums;
  margin-bottom:16px;
}
.step h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.step p{font-size:15px;color:var(--muted);line-height:1.8;}

/* ============ news jump ============ */
.news-jump{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  padding:32px 36px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(100deg,var(--surface) 0%,var(--surface-2) 100%);
  box-shadow:var(--shadow);
}
.news-jump h3{font-size:22px;font-weight:600;}
.news-jump p{margin-top:8px;color:var(--muted);font-size:15px;max-width:44em;}

/* ============ faq ============ */
.faq-list{border-top:1px solid var(--line);max-width:860px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:22px 4px;
  cursor:pointer;
  font-size:17px;
  font-weight:600;
  list-style:none;
  color:var(--text);
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  font-size:22px;
  font-weight:400;
  color:var(--brand);
  line-height:1;
  transition:transform .2s ease,color .2s ease;
}
.faq-item[open] summary::after{content:"×";color:var(--accent);}
.faq-item summary:hover{color:var(--brand);}
.faq-answer{padding:0 4px 24px;color:var(--muted);font-size:15.5px;line-height:1.9;max-width:40em;}

/* ============ cta band ============ */
.cta-band{
  position:relative;
  background:var(--ink-800);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:76px 0;
  text-align:center;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:radial-gradient(520px 240px at 22% 20%,rgba(59,232,176,.11),transparent 70%),
             radial-gradient(460px 220px at 80% 80%,rgba(255,193,94,.09),transparent 72%);
}
.cta-inner{position:relative;z-index:2;}
.cta-band h2{font-size:32px;font-weight:600;line-height:1.3;}
.cta-band p{margin:14px auto 0;max-width:38em;color:var(--muted);font-size:16px;}
.cta-actions{margin-top:28px;display:flex;justify-content:center;flex-wrap:wrap;gap:14px;}

/* ============ footer ============ */
.site-footer{
  background:var(--ink-900);
  padding:72px 0 24px;
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:36px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{color:var(--muted);font-size:14.5px;line-height:1.9;max-width:30em;}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:var(--text);
  margin-bottom:16px;
  letter-spacing:.3px;
}
.footer-col a{
  display:block;
  color:var(--muted);
  font-size:14.5px;
  padding:5px 0;
  transition:color .2s ease,padding-left .2s ease;
}
.footer-col a:hover{color:var(--brand);padding-left:4px;}
.footer-col p{color:var(--muted);font-size:14.5px;line-height:1.85;padding:3px 0;}
.footer-bottom{
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  font-size:13.5px;
  color:var(--muted);
}

/* ============ responsive ============ */
@media (max-width:1023px){
  :root{--section-y:72px;}
  .page-hero h1{font-size:38px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-figure{max-width:560px;}
  .main-nav{
    position:fixed;
    top:72px;
    left:0;
    right:0;
    bottom:0;
    background:var(--ink-900);
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:24px;
    overflow-y:auto;
    z-index:79;
  }
  .main-nav.is-open{display:flex;}
  .nav-link{padding:14px 16px;border-radius:12px;font-size:16px;}
  .header-cta{display:none;}
  .nav-toggle{display:block;}
  .steps{grid-template-columns:1fr;}
  .step::after{display:none;}
  .stats-band{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .news-jump{flex-direction:column;align-items:flex-start;}
}
@media (max-width:767px){
  :root{--section-y:56px;}
  body{font-size:16px;}
  .container{padding:0 18px;}
  .page-hero{padding:48px 0 56px;}
  .page-hero h1{font-size:31px;line-height:1.24;}
  .lead{font-size:16px;}
  .section-title{font-size:25px;}
  .dual-cards{grid-template-columns:1fr;}
  .info-card{padding:22px;}
  .hero-actions .btn{width:100%;}
  .cta-band{padding:52px 0;}
  .cta-band h2{font-size:24px;}
  .cta-actions .btn{width:100%;}
  .step{padding:22px;}
  .news-jump{padding:24px;}
  .news-jump .btn{width:100%;}
  .faq-item summary{font-size:16px;padding:18px 2px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:520px){
  .page-hero h1{font-size:27px;}
  .stat-num{font-size:30px;}
  .stats-band{grid-template-columns:1fr;}
  .brand-text{font-size:16px;}
}

/* roulang page: category4 */
:root{
  --ink-900:#120A1E;
  --ink-800:#1B1030;
  --surface:#241636;
  --surface-2:#2E1C45;
  --line:rgba(255,255,255,.09);
  --text:#F3EFFA;
  --muted:#A79BBB;
  --brand:#3BE8B0;
  --brand-ink:#06231A;
  --accent:#FFC15E;
  --accent-2:#8B6BFF;
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.75);
  --container:1180px;
  --header-h:72px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-radius:var(--radius);}
a{color:var(--brand);text-decoration:none;transition:color .22s ease;}
a:hover{color:#4CF3C0;}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:.2px;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;}
section[id],div[id]{scroll-margin-top:calc(var(--header-h) + 20px);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:200;
  background:var(--ink-900);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 12px 28px -18px rgba(0,0,0,.9);}
.header-inner{
  display:flex;align-items:center;gap:18px;
  min-height:var(--header-h);
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--text);font-weight:600;font-size:18px;letter-spacing:.5px;
  flex:0 0 auto;
}
.brand:hover{color:var(--text);}
.brand-mark{width:26px;height:26px;color:var(--brand);flex:0 0 auto;}
.brand-text{white-space:nowrap;}
.main-nav{
  display:flex;align-items:center;gap:4px;
  margin-left:auto;flex-wrap:nowrap;
}
.nav-link{
  display:inline-block;
  padding:8px 13px;border-radius:999px;
  font-size:14.5px;color:var(--text);white-space:nowrap;
  border-bottom:2px solid transparent;
  transition:background .22s ease,color .22s ease;
}
.nav-link:hover{background:rgba(255,255,255,.06);color:var(--text);}
.nav-link.is-active{color:var(--brand);border-bottom-color:var(--brand);background:rgba(59,232,176,.08);}
.header-cta{flex:0 0 auto;margin-left:10px;}
.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:44px;border-radius:12px;
  background:var(--surface-2);border:1px solid var(--line);
  cursor:pointer;position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:50%;width:18px;height:2px;background:var(--text);
  transform:translateX(-50%);border-radius:2px;transition:transform .22s ease,opacity .22s ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translateX(-50%) rotate(45deg);top:0;}
.nav-toggle[aria-expanded="true"] span::after{transform:translateX(-50%) rotate(-45deg);top:0;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--brand);color:var(--brand-ink);box-shadow:0 14px 30px -18px rgba(59,232,176,.9);}
.btn-primary:hover{background:#4CF3C0;color:var(--brand-ink);transform:translateY(-1px);box-shadow:0 18px 34px -16px rgba(59,232,176,.75);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--text);border-color:rgba(255,255,255,.28);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-soft{background:var(--surface-2);color:var(--text);border-color:var(--line);}
.btn-soft:hover{border-color:var(--accent-2);color:var(--text);}
.btn-block{width:100%;}

/* ---------- badges / pills ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12px;letter-spacing:.4px;
  background:rgba(59,232,176,.1);color:var(--brand);
  border:1px solid rgba(59,232,176,.24);
}
.badge-amber{background:rgba(255,193,94,.1);color:var(--accent);border-color:rgba(255,193,94,.26);}
.pill-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.pill{
  display:inline-block;padding:8px 18px;border-radius:999px;
  font-size:14px;color:var(--text);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  transition:border-color .2s ease,color .2s ease,background .2s ease,transform .2s ease;
}
.pill:hover{border-color:var(--brand);color:var(--brand);background:rgba(59,232,176,.08);transform:translateY(-1px);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:88px 0 76px;
  background:var(--ink-800);
  border-bottom:1px solid var(--line);
}
.page-hero .hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.32;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(circle at 18% 24%,rgba(59,232,176,.10) 0 1.5px,transparent 2px),
    radial-gradient(circle at 72% 62%,rgba(255,193,94,.10) 0 1.5px,transparent 2px),
    radial-gradient(circle at 44% 12%,rgba(139,107,255,.12) 0 1.5px,transparent 2px),
    linear-gradient(180deg,rgba(18,10,30,.72),rgba(18,10,30,.94));
  pointer-events:none;
}
.page-hero-inner{position:relative;z-index:2;max-width:760px;}
.page-hero h1{
  font-size:clamp(30px,4.4vw,50px);
  line-height:1.16;font-weight:700;margin:18px 0 16px;
}
.page-hero h1 .hl{color:var(--brand);}
.hero-sub{font-size:17px;color:var(--muted);max-width:36em;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- section shell ---------- */
.section{padding:96px 0;}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:720px;margin-bottom:46px;}
.section-head h2{font-size:clamp(25px,3.2vw,34px);line-height:1.3;margin-bottom:14px;}
.section-head p{color:var(--muted);margin:0;max-width:38em;}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:2px;color:var(--accent);
  text-transform:uppercase;margin-bottom:12px;
}

/* ---------- info rows ---------- */
.info-rows{display:flex;flex-direction:column;gap:14px;}
.info-row{
  display:grid;grid-template-columns:64px 1fr auto;align-items:center;gap:22px;
  padding:22px 26px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);
  transition:border-color .25s ease,transform .25s ease;
}
.info-row:hover{border-color:rgba(59,232,176,.32);transform:translateY(-2px);}
.info-row .idx{
  font-size:20px;font-weight:700;color:var(--accent);
  width:48px;height:48px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(255,193,94,.08);border:1px solid rgba(255,193,94,.22);
  font-variant-numeric:tabular-nums;
}
.info-row h3{font-size:19px;margin-bottom:4px;}
.info-row p{margin:0;color:var(--muted);font-size:15px;}

/* ---------- steps ---------- */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.step-card{
  position:relative;
  padding:28px 24px 26px;
  background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);
  transition:border-color .25s ease,transform .25s ease;
}
.step-card:hover{border-color:rgba(139,107,255,.45);transform:translateY(-2px);}
.step-card .step-no{
  display:block;font-size:40px;line-height:1;font-weight:700;color:var(--accent);
  font-variant-numeric:tabular-nums;margin-bottom:16px;
}
.step-card h3{font-size:18px;margin-bottom:10px;}
.step-card p{font-size:14.5px;color:var(--muted);margin:0;}

/* ---------- device split ---------- */
.device-split{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start;}
.device-figure{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.device-figure img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.device-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:18px 22px;font-size:13.5px;color:var(--text);
  background:linear-gradient(180deg,rgba(18,10,30,0),rgba(18,10,30,.92));
}
.device-cards{display:flex;flex-direction:column;gap:18px;}
.device-card{
  padding:24px 26px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);
}
.device-card h3{display:flex;align-items:center;gap:10px;font-size:19px;margin-bottom:14px;}
.device-card h3 i{color:var(--brand);font-size:17px;}
.check-list li{
  position:relative;padding-left:22px;margin-bottom:10px;
  color:var(--muted);font-size:15px;line-height:1.75;
}
.check-list li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:7px;height:7px;border-radius:2px;
  background:var(--brand);transform:rotate(45deg);
}
.check-list li:last-child{margin-bottom:0;}

/* ---------- stats ---------- */
.stats-band{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  padding:8px 0;
}
.stat{
  padding:26px 24px;border-radius:var(--radius);
  background:var(--surface-2);border:1px solid var(--line);
  text-align:left;
}
.stat .value{
  font-size:38px;font-weight:700;color:var(--accent);line-height:1.1;
  font-variant-numeric:tabular-nums;letter-spacing:.5px;
}
.stat .value small{font-size:16px;font-weight:600;margin-left:4px;color:var(--accent);}
.stat .label{font-size:13.5px;color:var(--muted);margin-top:8px;}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line);max-width:860px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;font-size:17.5px;font-weight:600;color:var(--text);
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-size:24px;line-height:1;color:var(--brand);
  flex:0 0 auto;transition:transform .22s ease,color .22s ease;
}
.faq-item[open] summary::after{content:"×";color:var(--accent);}
.faq-item summary:hover{color:var(--brand);}
.faq-item .faq-body{padding:0 4px 24px;color:var(--muted);font-size:15.5px;max-width:40em;}
.faq-item .faq-body p{margin:0;}

/* ---------- inline link block ---------- */
.link-strip{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  margin-top:44px;padding:24px 28px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
}
.link-strip p{margin:0;color:var(--muted);font-size:15px;}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  padding:82px 0;text-align:center;background:var(--ink-800);
  border-top:1px solid var(--line);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(circle at 22% 30%,rgba(59,232,176,.10) 0 1.6px,transparent 2px),
    radial-gradient(circle at 68% 70%,rgba(255,193,94,.10) 0 1.6px,transparent 2px),
    radial-gradient(circle at 86% 22%,rgba(139,107,255,.12) 0 1.6px,transparent 2px);
  opacity:.9;pointer-events:none;
}
.cta-band .container{position:relative;z-index:2;}
.cta-band h2{font-size:clamp(24px,3.2vw,34px);margin-bottom:16px;}
.cta-band p{color:var(--muted);max-width:34em;margin:0 auto 30px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink-900);
  border-top:1px solid var(--line);
  padding:72px 0 80px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:40px;border-bottom:1px solid var(--line);
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{color:var(--muted);font-size:14.5px;max-width:30em;margin:0;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text);}
.footer-col a,.footer-col p{
  display:block;color:var(--muted);font-size:14.5px;margin:0 0 10px;
  transition:color .2s ease;
}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-top:24px;color:var(--muted);font-size:13px;
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .header-inner{gap:12px;}
  .main-nav{
    position:fixed;left:0;right:0;top:var(--header-h);bottom:0;
    display:none;flex-direction:column;align-items:stretch;gap:6px;
    padding:22px 24px 40px;
    background:var(--ink-900);
    border-top:1px solid var(--line);
    overflow-y:auto;z-index:190;
  }
  .main-nav.is-open{display:flex;}
  .nav-link{padding:14px 16px;font-size:16px;border-bottom:1px solid var(--line);border-radius:12px;}
  .nav-link.is-active{background:rgba(59,232,176,.1);}
  .nav-toggle{display:block;}
  .header-cta{display:none;}
  .steps-grid{grid-template-columns:repeat(2,1fr);}
  .device-split{grid-template-columns:1fr;}
  .stats-band{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding:72px 0;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .page-hero{padding:64px 0 56px;}
  .hero-actions .btn{flex:1 1 100%;}
  .info-row{grid-template-columns:48px 1fr;gap:16px;align-items:start;padding:20px;}
  .info-row .badge{grid-column:2;justify-self:start;}
  .steps-grid{grid-template-columns:1fr;}
  .stats-band{grid-template-columns:1fr;}
  .link-strip{flex-direction:column;align-items:flex-start;}
  .cta-actions .btn{flex:1 1 100%;}
}
@media (max-width:519px){
  .container{padding:0 18px;}
  .page-hero h1{font-size:30px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .info-row .idx{width:42px;height:42px;font-size:17px;}
}

/* roulang page: category5 */
:root{
  --ink-900:#120A1E;
  --ink-800:#1B1030;
  --surface:#241636;
  --surface-2:#2E1C45;
  --line:rgba(255,255,255,0.09);
  --text:#F3EFFA;
  --muted:#A79BBB;
  --brand:#3BE8B0;
  --brand-ink:#06231A;
  --accent:#FFC15E;
  --accent-2:#8B6BFF;
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.75);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,h4{margin:0;line-height:1.28;font-weight:600;letter-spacing:.01em}
p{margin:0}
strong{font-weight:700}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:rgba(59,232,176,.28);color:#fff}

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

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--ink-900);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 14px 30px -20px rgba(0,0,0,.95)}
.header-inner{display:flex;align-items:center;gap:16px;min-height:72px;padding-top:8px;padding-bottom:8px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:600;color:var(--text);white-space:nowrap}
.brand-mark{width:24px;height:24px;color:var(--brand);transition:transform .3s ease}
.brand:hover .brand-mark{transform:rotate(72deg)}
.brand-text{letter-spacing:.02em}

.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:8px 14px;border-radius:999px;
  font-size:15px;color:var(--muted);
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.06)}
.nav-link.is-active{color:var(--brand)}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-cta{display:none}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1.2;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:var(--brand-ink)}
.btn-primary:hover{background:#4CF3C0;transform:translateY(-1px);box-shadow:0 16px 28px -16px rgba(59,232,176,.7)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{border:1px solid rgba(255,255,255,.22);color:var(--text);background:transparent}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-block{width:100%}
.header-cta{padding:12px 22px}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;margin-left:8px;
  border:1px solid var(--line);border-radius:999px;background:var(--surface);
}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:background .2s ease}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;
  transition:transform .25s ease,top .25s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:80px 0 68px;
  background-image:linear-gradient(180deg,rgba(18,10,30,.90),rgba(18,10,30,.97)),url('/assets/images/backpic/back-3.png');
  background-size:cover,cover;
  background-position:center,center;
  background-repeat:no-repeat,no-repeat;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(circle,rgba(243,239,250,.55) 1px,transparent 1px),
    radial-gradient(circle,rgba(59,232,176,.5) 1px,transparent 1px);
  background-size:190px 190px,280px 280px;
  background-position:0 0,110px 140px;
  opacity:.12;
}
.page-hero .container{position:relative;z-index:1}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:26px}
.crumbs a{color:var(--muted);transition:color .2s ease}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{opacity:.45}
.crumbs .current{color:var(--text)}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  font-size:12.5px;letter-spacing:.06em;
  color:var(--brand);background:rgba(59,232,176,.10);
  border:1px solid rgba(59,232,176,.24);
  margin-bottom:20px;
}
.page-hero h1{
  font-size:clamp(30px,4.6vw,50px);
  line-height:1.16;
  font-weight:700;
  letter-spacing:-.4px;
  max-width:820px;
}
.hero-lead{max-width:660px;margin-top:18px;color:var(--muted);font-size:17px}
.pill-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.pill{
  display:inline-flex;align-items:center;
  padding:8px 16px;border-radius:999px;
  font-size:14px;color:var(--text);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.pill:hover{border-color:var(--brand);color:var(--brand);background:rgba(59,232,176,.07)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-meta{display:flex;flex-wrap:wrap;gap:40px;margin-top:38px;padding-top:26px;border-top:1px solid var(--line)}
.hero-meta .item{display:flex;flex-direction:column;gap:2px}
.hero-meta .num{font-size:24px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.2}
.hero-meta .label{font-size:12.5px;color:var(--muted)}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section-alt{background:var(--ink-800)}
.section-head{max-width:680px;margin-bottom:44px}
.eyebrow{display:block;font-size:13px;letter-spacing:.08em;color:var(--brand);margin-bottom:12px}
.section-head h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.section-head p{color:var(--muted)}

/* features */
.features-grid{display:flex;flex-wrap:wrap;margin:0 -14px;align-items:center}
.features-grid>.cell{width:100%;padding:0 14px}
.feature-list{margin-top:4px}
.feature-list li{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}
.feature-list li:first-child{padding-top:0}
.feature-list li:last-child{border-bottom:0;padding-bottom:0}
.feature-list .ic{
  flex:0 0 44px;width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line);color:var(--brand);
}
.feature-list h3{font-size:17px;margin-bottom:4px}
.feature-list p{color:var(--muted);font-size:15px;line-height:1.75;margin:0}
.figure-card{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);
  background:var(--surface);
}
.figure-card img{width:100%;height:100%;min-height:360px;object-fit:cover}
.figure-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(18,10,30,0) 45%,rgba(18,10,30,.78) 100%);
  pointer-events:none;
}
.figure-badge{
  position:absolute;left:18px;bottom:18px;z-index:2;
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:999px;font-size:13px;
  color:var(--brand);background:rgba(18,10,30,.88);
  border:1px solid rgba(59,232,176,.35);
}

/* steps */
.steps{position:relative;max-width:860px}
.steps::before{
  content:"";position:absolute;left:23px;top:14px;bottom:14px;width:1px;
  background:linear-gradient(180deg,rgba(59,232,176,.85),rgba(139,107,255,.45));
}
.step{position:relative;padding:0 0 44px 78px}
.step:last-child{padding-bottom:0}
.step-num{
  position:absolute;left:0;top:-2px;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line);
  font-size:17px;font-weight:700;color:var(--accent);
  font-variant-numeric:tabular-nums;
  box-shadow:0 0 0 6px var(--ink-900);
}
.step h3{font-size:19px;margin-bottom:8px}
.step p{color:var(--muted);max-width:640px;font-size:15.6px}

/* stat band */
.stat-band{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--surface);box-shadow:var(--shadow);overflow:hidden;
}
.stat{padding:32px 26px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat .num{font-size:38px;font-weight:700;color:var(--accent);line-height:1.1;font-variant-numeric:tabular-nums}
.stat .num small{font-size:15px;font-weight:600;color:var(--muted);margin-left:4px}
.stat .label{margin-top:10px;font-size:13.5px;color:var(--muted);line-height:1.6}
.band-note{margin-top:18px;font-size:13.5px;color:var(--muted)}

/* jump card */
.jump-card{
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  padding:38px 40px;border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(120deg,var(--surface),var(--surface-2));
  box-shadow:var(--shadow);
}
.jump-card h2{font-size:24px;margin-bottom:10px}
.jump-card p{color:var(--muted);font-size:15px;max-width:560px}

/* faq */
.faq-list{border-top:1px solid var(--line);max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--text);
  cursor:pointer;list-style:none;
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-item summary::after{
  content:"+";flex:0 0 auto;
  font-size:22px;line-height:1;font-weight:400;color:var(--brand);
  transition:transform .25s ease;
}
.faq-item[open] summary::after{content:"×";transform:rotate(180deg)}
.faq-body{padding:0 4px 26px;color:var(--muted);font-size:15.5px;max-width:780px}
.faq-body p+p{margin-top:10px}

/* cta band */
.cta-band{
  position:relative;overflow:hidden;text-align:center;
  padding:78px 0;
  background:var(--ink-800);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(circle,rgba(243,239,250,.5) 1px,transparent 1px),
    radial-gradient(circle,rgba(255,193,94,.45) 1px,transparent 1px);
  background-size:220px 220px,320px 320px;
  background-position:20px 30px,150px 90px;
  opacity:.1;
}
.cta-band .container{position:relative;z-index:1}
.cta-band h2{font-size:clamp(24px,3vw,32px);margin-bottom:14px}
.cta-band p{color:var(--muted);max-width:560px;margin:0 auto 30px}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px}

/* footer */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px;padding-bottom:46px}
.footer-brand .brand{font-size:17px}
.footer-brand p{margin-top:16px;color:var(--muted);font-size:14.5px;max-width:330px;line-height:1.8}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:16px;letter-spacing:.04em}
.footer-col a{display:block;color:var(--muted);font-size:14.5px;padding:6px 0;transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:var(--brand);transform:translateX(2px)}
.footer-col p{color:var(--muted);font-size:14px;margin-bottom:10px}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;
  padding:22px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}

/* ---------- responsive ---------- */
@media (min-width:1024px){
  .features-grid>.cell{width:50%}
}
@media (max-width:1060px){
  .main-nav{
    position:fixed;left:0;right:0;top:72px;bottom:0;
    display:none;flex-direction:column;align-items:stretch;gap:6px;
    margin-left:0;padding:22px 24px 40px;
    background:var(--ink-800);border-top:1px solid var(--line);
    overflow-y:auto;z-index:110;
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:14px 16px;font-size:16px;color:var(--text)}
  .nav-link.is-active::after{left:16px;right:auto;width:22px;bottom:8px}
  .nav-cta{display:inline-flex;margin-top:18px}
  .header-cta{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{justify-content:space-between}
  .site-header .brand{margin-right:auto}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .page-hero{padding:64px 0 56px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .stat-band{grid-template-columns:1fr 1fr}
  .stat{border-right:1px solid var(--line)}
  .stat:nth-child(2n){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .figure-card img{min-height:300px}
  .feature-list{margin-bottom:34px}
}
@media (max-width:767px){
  body{font-size:16px}
  .section{padding:56px 0}
  .container{padding:0 18px}
  .page-hero{padding:52px 0 48px}
  .hero-lead{font-size:16px}
  .hero-meta{gap:26px}
  .hero-meta .num{font-size:21px}
  .hero-actions .btn{flex:1 1 100%}
  .pill-nav{gap:8px}
  .pill{font-size:13.5px;padding:7px 14px}
  .steps::before{left:21px}
  .step{padding-left:64px;padding-bottom:36px}
  .step-num{width:42px;height:42px;font-size:16px}
  .jump-card{padding:26px 22px;gap:22px}
  .jump-card .btn{width:100%}
  .cta-band{padding:58px 0}
  .cta-actions .btn{flex:1 1 100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-bottom{flex-direction:column;gap:8px}
  .stat{padding:24px 20px}
  .stat .num{font-size:30px}
}
@media (max-width:519px){
  .page-hero h1{font-size:29px}
  .hero-meta{gap:20px 26px}
  .stat-band{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--line)}
  .stat:last-child{border-bottom:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr}
  .figure-card img{min-height:230px}
  .figure-badge{left:12px;bottom:12px;font-size:12px;padding:7px 12px}
}