/* roulang page: index */
:root{
  --bg:#0A0C0F;
  --surface:#14181D;
  --surface-2:#1B2027;
  --line:rgba(255,255,255,.08);
  --brand:#2FE3B4;
  --brand-2:#7A6BFF;
  --text:#F3F5F6;
  --text-2:#A9B2B9;
  --text-3:#6A737C;
  --glow:0 0 24px rgba(47,227,180,.18);
  --focus:0 0 0 3px rgba(47,227,180,.35);
  --radius:14px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);font-family:var(--font-sans);
  font-size:16.5px;line-height:1.85;-webkit-font-smoothing:antialiased;
  background-image:radial-gradient(circle at 15% -10%,rgba(47,227,180,.07),transparent 45%),radial-gradient(circle at 90% 0%,rgba(122,107,255,.08),transparent 40%);
  background-repeat:no-repeat;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease),opacity .22s var(--ease)}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 16px}
h1,h2,h3,h4{margin:0 0 16px;letter-spacing:-.02em;font-weight:800;line-height:1.25}
h1{font-size:clamp(34px,5.2vw,60px);line-height:1.1}
h2{font-size:clamp(26px,3.4vw,40px);line-height:1.2}
h3{font-size:22px;line-height:1.35}
h4{font-size:18px;font-weight:600;line-height:1.45}
::selection{background:rgba(47,227,180,.3);color:#fff}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0}
.container{width:100%;max-width:1160px;margin:0 auto;padding-left:20px;padding-right:20px}
@media (min-width:1400px){.container{max-width:1240px}}

/* ---------- 按钮 / 徽章 / 文字链接 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:8px;padding:12px 22px;
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;min-height:44px;position:relative;overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),filter .22s var(--ease)}
.btn:focus-visible{outline:none;box-shadow:var(--focus)}
.btn-brand{background:var(--brand);color:#0A0C0F}
.btn-brand span{position:relative;z-index:2}
.btn-brand::before{content:"";position:absolute;inset:0;background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.5) 50%,transparent 70%);
  transform:translateX(-130%);transition:transform .55s var(--ease)}
.btn-brand:hover::before{transform:translateX(130%)}
.btn-brand:hover{box-shadow:var(--glow);filter:brightness(1.06)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);box-shadow:0 0 0 1px rgba(47,227,180,.25)}
.btn-sm{padding:9px 16px;font-size:14px;min-height:40px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:15px;font-weight:600}
.text-link i{display:inline-block;transition:transform .22s var(--ease);font-style:normal}
.text-link:hover i{transform:translateX(5px)}
.badge-pill{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12px;
  letter-spacing:.06em;border:1px solid rgba(122,107,255,.45);background:rgba(122,107,255,.12);color:#C6BFFF}
.badge-pill.is-brand{border-color:rgba(47,227,180,.45);background:rgba(47,227,180,.12);color:#8DF3DA}

/* ---------- 顶栏 ---------- */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(10,12,15,.86);backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease)}
.site-header.is-scrolled::after{transform:scaleX(1)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-dot{width:8px;height:8px;border-radius:2px;background:var(--brand);box-shadow:0 0 12px rgba(47,227,180,.9);
  transition:box-shadow .22s var(--ease);flex:0 0 auto}
.brand:hover .brand-dot{box-shadow:0 0 18px rgba(47,227,180,1),0 0 38px rgba(47,227,180,.5)}
.desktop-nav{display:flex;align-items:center;gap:2px}
.nav-link{position:relative;padding:8px 12px;font-size:15px;color:var(--text-2);border-radius:8px}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--brand);text-shadow:0 0 12px rgba(47,227,180,.5)}
.nav-actions{display:flex;align-items:center;gap:10px}
.menu-toggle{display:none;width:44px;height:44px;border-radius:8px;border:1px solid var(--line);background:transparent;
  color:var(--text);align-items:center;justify-content:center;cursor:pointer}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand)}
.menu-toggle svg{width:20px;height:20px}
.offcanvas.mobile-nav{background:#07080A;color:var(--text);width:min(88vw,340px);border-left:1px solid var(--line)}
.mobile-nav .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px}
.mobile-nav .offcanvas-body{padding:14px 20px 24px;display:flex;flex-direction:column;gap:2px}
.mobile-nav .m-link{display:block;padding:15px 0;font-size:20px;font-weight:600;color:var(--text-2);border-bottom:1px solid var(--line)}
.mobile-nav .m-link:hover,.mobile-nav .m-link.active{color:var(--brand)}
.mobile-nav .m-cta{margin-top:22px}
.btn-close-ghost{width:38px;height:38px;border-radius:8px;border:1px solid var(--line);background:transparent;color:var(--text);
  cursor:pointer;display:inline-flex;align-items:center;justify-content:center}
.btn-close-ghost:hover{border-color:var(--brand);color:var(--brand)}
@media (max-width:1120px){
  .desktop-nav{gap:0}
  .nav-link{padding:8px 9px;font-size:14px}
}
@media (max-width:991.98px){
  .desktop-nav{display:none}
  .nav-actions .btn-brand{display:none}
  .menu-toggle{display:inline-flex}
  .nav-wrap{height:60px}
  .brand{font-size:17px}
}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);display:flex;align-items:center;min-height:620px}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.46}
.hero-veil{position:absolute;inset:0;background:
  linear-gradient(100deg,rgba(10,12,15,.97) 0%,rgba(10,12,15,.86) 46%,rgba(10,12,15,.6) 100%),
  radial-gradient(circle at 82% 18%,rgba(122,107,255,.24),transparent 55%)}
.hero-grid{position:absolute;inset:0;opacity:.28;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px}
.hero-line{position:absolute;top:56px;bottom:56px;left:6%;width:1px;
  background:linear-gradient(180deg,transparent,rgba(47,227,180,.75),transparent)}
.hero-inner{position:relative;z-index:2;width:100%;padding-top:84px;padding-bottom:84px}
.hero h1{margin-bottom:20px;max-width:14em}
.hero h1 .hl{color:var(--brand);text-shadow:0 0 26px rgba(47,227,180,.35)}
.hero-sub{font-size:18px;line-height:1.85;color:var(--text-2);max-width:620px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:40px}
.hero-stats{display:flex;flex-wrap:wrap;gap:36px;padding-top:26px;border-top:1px solid var(--line)}
.hero-stat b{display:block;font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:28px;font-weight:700;color:var(--text);line-height:1.2}
.hero-stat span{font-size:12px;letter-spacing:.1em;color:var(--text-3)}
.hero-panel{background:rgba(20,24,29,.82);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;backdrop-filter:blur(10px);box-shadow:0 0 0 1px rgba(47,227,180,.06),0 0 40px rgba(47,227,180,.08)}
.hero-panel .panel-head{display:flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.1em;color:var(--text-3);margin-bottom:20px}
.pulse{width:8px;height:8px;border-radius:999px;background:var(--brand);box-shadow:0 0 0 0 rgba(47,227,180,.6);animation:pulse 2.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(47,227,180,.5)}70%{box-shadow:0 0 0 12px rgba(47,227,180,0)}100%{box-shadow:0 0 0 0 rgba(47,227,180,0)}}
.panel-list li{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
.panel-list li:last-of-type{border-bottom:0}
.panel-list span{color:var(--text-3);font-size:13px;letter-spacing:.06em}
.panel-list strong{font-weight:600;color:var(--text)}
.hero-panel .text-link{margin-top:16px}
.wave{display:flex;align-items:flex-end;gap:4px;height:36px;margin-top:22px}
.wave i{display:block;width:4px;border-radius:2px;background:linear-gradient(180deg,var(--brand),rgba(122,107,255,.7));opacity:.85}
@media (max-width:991.98px){
  .hero{min-height:520px}
  .hero-inner{padding-top:56px;padding-bottom:56px}
  .hero-line{display:none}
  .hero-panel{margin-top:8px}
}
@media (max-width:767.98px){
  .hero-stats{gap:24px}
  .hero-actions .btn{width:100%}
}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section.tight{padding:72px 0}
.section.alt{background:linear-gradient(180deg,rgba(27,32,39,.55),rgba(10,12,15,0))}
.section-head{margin-bottom:48px}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.18em;color:var(--brand);margin-bottom:14px}
.section-head .eyebrow::before{content:"";width:26px;height:1px;background:var(--brand)}
.section-head p{color:var(--text-2);max-width:660px;margin-bottom:0}
.section-head.right{text-align:right}
.section-head.right .eyebrow{flex-direction:row-reverse}
.section-head.right p{margin-left:auto}
@media (max-width:991.98px){
  .section{padding:72px 0}
  .section.tight{padding:60px 0}
  .section-head{margin-bottom:36px}
}
@media (max-width:767.98px){
  .section{padding:52px 0}
  .section.tight{padding:48px 0}
  .section-head.right{text-align:left}
  .section-head.right .eyebrow{flex-direction:row}
  .section-head.right p{margin-left:0}
}

/* ---------- Bento 功能 ---------- */
.bento{display:grid;gap:20px;grid-template-columns:repeat(4,minmax(0,1fr))}
.bento-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);position:relative;overflow:hidden}
.bento-card:hover{transform:translateY(-2px);border-color:rgba(47,227,180,.36);box-shadow:var(--glow)}
.bento-card:hover h3{color:var(--brand)}
.bento-card h3{margin-bottom:10px;transition:color .22s var(--ease)}
.bento-card p{color:var(--text-2);font-size:14.5px;line-height:1.8;margin-bottom:0}
.bento-icon{width:42px;height:42px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(47,227,180,.35);background:rgba(47,227,180,.08);color:var(--brand);margin-bottom:18px}
.bento-icon svg{width:20px;height:20px}
.bento-large{grid-column:span 2;grid-row:span 2;padding:0;display:flex;flex-direction:column}
.bento-large img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius) var(--radius) 0 0;background:linear-gradient(135deg,#1B2027,#14181D)}
.bento-large .bento-large-body{padding:26px}
.bento-large h3{font-size:24px}
.tick-list{margin-top:16px;display:grid;gap:10px}
.tick-list li{display:flex;gap:10px;align-items:flex-start;color:var(--text-2);font-size:14.5px;line-height:1.75}
.tick-list li::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--brand);margin-top:9px;flex:0 0 auto}
.bento-wide{grid-column:span 2}
@media (max-width:991.98px){
  .bento{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bento-large{grid-column:span 2;grid-row:auto}
}
@media (max-width:639.98px){
  .bento{grid-template-columns:1fr}
  .bento-large,.bento-wide{grid-column:span 1}
}

/* ---------- 场景 交错 ---------- */
.scene{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:56px;align-items:center;padding:56px 0;border-top:1px solid var(--line)}
.scene:first-of-type{border-top:0;padding-top:0}
.scene-media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--radius);border:1px solid var(--line);
  background:linear-gradient(135deg,#1B2027,#14181D)}
.scene-index{font-family:var(--font-mono);font-size:13px;letter-spacing:.16em;color:var(--brand);display:block;margin-bottom:14px}
.scene-body p{color:var(--text-2)}
.scene.reverse .scene-media{order:2}
@media (max-width:991.98px){
  .scene{grid-template-columns:1fr;gap:26px;padding:40px 0}
  .scene.reverse .scene-media{order:0}
}

/* ---------- 案例 ---------- */
.case-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.case-card{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius);padding:28px;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease)}
.case-card:hover{transform:translateY(-2px);border-color:rgba(122,107,255,.4);box-shadow:0 0 24px rgba(122,107,255,.16)}
.case-quote{font-size:19px;line-height:1.7;font-weight:600;margin-bottom:22px;color:var(--text)}
.case-quote::before{content:"“";color:var(--brand);font-size:32px;line-height:0;vertical-align:-8px;margin-right:6px}
.case-meta{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:18px;border-top:1px solid var(--line)}
.case-meta span{font-size:13px;color:var(--text-3);letter-spacing:.06em}
.case-meta b{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:20px;color:var(--brand);font-weight:700}

/* ---------- 方案 ---------- */
.plan-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));align-items:start}
.plan{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease)}
.plan:hover{transform:translateY(-2px);border-color:rgba(47,227,180,.3);box-shadow:var(--glow)}
.plan.featured{border-color:var(--brand);box-shadow:0 0 0 1px rgba(47,227,180,.25),0 0 32px rgba(47,227,180,.14);transform:scale(1.02)}
.plan.featured:hover{transform:scale(1.02) translateY(-2px)}
.plan-tag{display:inline-flex;padding:3px 12px;border-radius:999px;font-size:12px;letter-spacing:.08em;
  background:var(--brand);color:#0A0C0F;font-weight:700;margin-bottom:16px}
.plan h3{margin-bottom:6px}
.plan-desc{color:var(--text-2);font-size:14.5px;margin-bottom:20px}
.plan-price{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:40px;font-weight:700;line-height:1.1}
.plan-price small{font-size:13px;font-family:var(--font-sans);color:var(--text-3);margin-left:6px;letter-spacing:.08em}
.plan-list{margin:22px 0 26px;display:grid;gap:12px}
.plan-list li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2);line-height:1.7}
.plan-list li svg{width:16px;height:16px;flex:0 0 auto;margin-top:6px;color:var(--brand)}
.plan .btn{width:100%}
@media (max-width:767.98px){
  .plan.featured{transform:none}
  .plan.featured:hover{transform:translateY(-2px)}
}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(290px,1fr))}
.news-card{position:relative;display:flex;flex-direction:column;gap:12px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);padding:24px 24px 22px;overflow:hidden;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease)}
.news-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--brand);
  transform:scaleY(.32);transform-origin:top;transition:transform .26s var(--ease)}
.news-card:hover{transform:translateY(-2px);border-color:rgba(47,227,180,.35);box-shadow:var(--glow)}
.news-card:hover::before{transform:scaleY(1)}
.news-card:hover .news-title{color:var(--brand)}
.news-title{font-size:17.5px;font-weight:700;line-height:1.5;margin:0;transition:color .22s var(--ease);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-summary{color:var(--text-2);font-size:14px;line-height:1.75;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3)}
.news-meta .news-time{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.empty-state{border:1px dashed var(--line);border-radius:var(--radius);min-height:200px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:14px;padding:36px;text-align:center;background:rgba(20,24,29,.5)}
.empty-state svg{width:34px;height:34px;color:var(--brand)}
.empty-state p{color:var(--text-2);margin:0;font-size:15px}

/* ---------- FAQ ---------- */
.faq-accordion .accordion-item{position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);margin-bottom:12px;overflow:hidden}
.faq-accordion .accordion-item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--brand);
  transform:scaleY(0);transform-origin:top;transition:transform .24s var(--ease);z-index:2}
.faq-accordion .accordion-item:has(.accordion-button:not(.collapsed)){border-color:rgba(47,227,180,.32)}
.faq-accordion .accordion-item:has(.accordion-button:not(.collapsed))::before{transform:scaleY(1)}
.faq-accordion .accordion-button{background:transparent;color:var(--text);font-size:17px;font-weight:600;
  padding:20px 22px;box-shadow:none;display:flex;align-items:center;gap:16px;line-height:1.6}
.faq-accordion .accordion-button:not(.collapsed){color:var(--brand);background:rgba(47,227,180,.04);box-shadow:none}
.faq-accordion .accordion-button:focus{box-shadow:var(--focus);z-index:3}
.faq-num{font-family:var(--font-mono);font-size:16px;color:var(--text-3);flex:0 0 auto;letter-spacing:.04em}
.faq-accordion .accordion-button:not(.collapsed) .faq-num{color:var(--brand)}
.faq-accordion .accordion-button::after{content:"";background-image:none;width:9px;height:9px;border-right:2px solid var(--text-3);
  border-bottom:2px solid var(--text-3);transform:rotate(45deg);margin-left:auto;flex:0 0 auto;transition:transform .24s var(--ease),border-color .24s var(--ease)}
.faq-accordion .accordion-button:hover::after{border-color:var(--brand)}
.faq-accordion .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);border-color:var(--brand)}
.faq-accordion .accordion-body{padding:0 22px 22px 56px;color:var(--text-2);font-size:15px;line-height:1.9}
@media (max-width:767.98px){
  .faq-accordion .accordion-body{padding-left:22px}
  .faq-accordion .accordion-button{font-size:16px;padding:18px}
}

/* ---------- CTA ---------- */
.cta-band{position:relative;overflow:hidden;border:1px solid rgba(47,227,180,.4);border-radius:var(--radius);
  padding:52px 44px;background-image:linear-gradient(100deg,rgba(10,12,15,.94),rgba(20,24,29,.86)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center}
.cta-band h2{margin-bottom:12px;font-size:clamp(24px,3vw,34px)}
.cta-band p{color:var(--text-2);margin-bottom:26px;max-width:560px}
@media (max-width:767.98px){
  .cta-band{padding:36px 24px}
  .cta-band .btn{width:100%}
}

/* ---------- 页脚 ---------- */
.site-footer{background:#08090B;border-top:1px solid var(--line);padding:64px 0 0;margin-top:8px}
.footer-title{font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--text-3);margin-bottom:18px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:800;margin-bottom:14px}
.footer-about{color:var(--text-3);font-size:14px;line-height:1.85;max-width:300px;margin:0}
.footer-links li{margin-bottom:10px}
.footer-links a{display:inline-block;font-size:14.5px;color:var(--text-2)}
.footer-links a:hover{color:var(--brand);transform:translateX(2px)}
.footer-info li{display:flex;justify-content:space-between;gap:12px;font-size:14px;color:var(--text-2);margin-bottom:10px}
.footer-info li span:last-child{color:var(--text-3);font-family:var(--font-mono)}
.footer-bottom{margin-top:52px;border-top:1px solid var(--line);padding:22px 0;display:flex;flex-wrap:wrap;
  gap:12px;justify-content:space-between;font-size:13px;color:var(--text-3)}
@media (max-width:767.98px){
  .site-footer{padding-top:48px}
  .footer-about{max-width:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
  --bg:#0A0C0F;
  --surface:#14181D;
  --surface-2:#1B2027;
  --line:rgba(255,255,255,.08);
  --brand:#2FE3B4;
  --brand-2:#7A6BFF;
  --text:#F3F5F6;
  --text-2:#A9B2B9;
  --text-3:#6A737C;
  --warn:#F0A868;
  --glow:0 0 24px rgba(47,227,180,.18);
  --focus:0 0 0 3px rgba(47,227,180,.35);
  --r-card:14px;
  --r-btn:8px;
  --r-input:10px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(680px 420px at 12% -6%, rgba(47,227,180,.10), transparent 70%),
    radial-gradient(620px 400px at 92% 4%, rgba(122,107,255,.10), transparent 72%);
}
a{color:var(--brand);text-decoration:none;transition:color 220ms var(--ease),opacity 220ms var(--ease);}
a:hover{color:#63f2cd;}
img{max-width:100%;height:auto;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{letter-spacing:-.02em;color:var(--text);margin:0;}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:6px;}
::selection{background:rgba(47,227,180,.28);color:#fff;}

.container{width:100%;max-width:1160px;margin:0 auto;padding-left:20px;padding-right:20px;position:relative;z-index:2;}
@media (min-width:1400px){.container{max-width:1240px;}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:11px 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;position:relative;overflow:hidden;
  transition:transform 220ms var(--ease),background 220ms var(--ease),color 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.btn-sm{min-height:40px;padding:9px 18px;font-size:14px;}
.btn-brand{background:var(--brand);color:#0A0C0F;border-color:var(--brand);}
.btn-brand::after{
  content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);
  transform:skewX(-18deg);transition:left 520ms var(--ease);
}
.btn-brand:hover{background:#4defc2;border-color:#4defc2;color:#07090B;transform:translateY(-2px);box-shadow:var(--glow);}
.btn-brand:hover::after{left:120%;}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);box-shadow:var(--glow);}
.btn:focus-visible{box-shadow:var(--focus);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(10,12,15,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);transform-origin:left;transition:transform 320ms var(--ease);
}
.site-header.scrolled::after{transform:scaleX(1);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:800;color:var(--text);letter-spacing:-.01em;}
.brand:hover{color:var(--text);}
.brand-dot{
  width:9px;height:9px;border-radius:3px;flex:0 0 auto;
  background:var(--brand);box-shadow:0 0 12px rgba(47,227,180,.65);
  transition:box-shadow 220ms var(--ease),transform 220ms var(--ease);
}
.brand:hover .brand-dot{box-shadow:0 0 22px rgba(47,227,180,.95);transform:scale(1.15);}
.desktop-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;display:inline-block;padding:10px 12px;
  font-size:15px;color:var(--text-2);white-space:nowrap;
  transition:color 220ms var(--ease),text-shadow 220ms var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform 240ms var(--ease);border-radius:2px;
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand);text-shadow:0 0 12px rgba(47,227,180,.5);}
.nav-link.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.menu-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line);border-radius:var(--r-btn);color:var(--text);
  transition:border-color 220ms var(--ease),color 220ms var(--ease);
}
.menu-toggle svg{width:20px;height:20px;}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand);}

/* ---------- offcanvas ---------- */
.offcanvas.mobile-nav{background:#05070A;color:var(--text);border-left:1px solid var(--line);width:min(88vw,360px);}
.mobile-nav .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px;}
.mobile-nav .offcanvas-body{padding:18px 20px 28px;display:flex;flex-direction:column;}
.mobile-nav .m-link{
  display:block;padding:16px 0;font-size:20px;font-weight:700;color:var(--text);
  border-bottom:1px solid var(--line);
}
.mobile-nav .m-link.active{color:var(--brand);text-shadow:0 0 12px rgba(47,227,180,.5);}
.mobile-nav .m-link:hover{color:var(--brand);}
.mobile-nav .m-cta{margin-top:auto;padding-top:22px;}
.mobile-nav .m-cta .btn{width:100%;}
.btn-close-mini{
  width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:transparent;color:var(--text-2);display:inline-flex;align-items:center;justify-content:center;
}
.btn-close-mini:hover{color:var(--brand);border-color:var(--brand);}

/* ---------- article head ---------- */
.article-head{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(10,12,15,.82) 0%,rgba(10,12,15,.94) 62%,rgba(10,12,15,1) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.article-head::before{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;mask-image:linear-gradient(180deg,#000,transparent 88%);
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 88%);
}
.article-head .container{padding-top:34px;padding-bottom:44px;}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);letter-spacing:.04em;}
.crumb a{color:var(--text-3);}
.crumb a:hover{color:var(--brand);}
.crumb-sep{color:rgba(255,255,255,.18);}
.crumb-now{color:var(--text-2);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.head-inner{max-width:860px;margin-top:22px;}
.page-title{font-size:clamp(28px,4vw,42px);line-height:1.18;font-weight:800;}
.meta-row{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-top:20px;font-size:13px;color:var(--text-3);letter-spacing:.06em;}
.meta-num{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--text-2);}
.meta-dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.2);}
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:12px;letter-spacing:.08em;
  border:1px solid rgba(122,107,255,.55);background:rgba(122,107,255,.12);color:#BDB4FF;
}
.badge-soft.is-brand{border-color:rgba(47,227,180,.5);background:rgba(47,227,180,.12);color:#79F2D3;}

/* ---------- article layout ---------- */
.article-main{padding:72px 0 96px;}
.article-content{max-width:760px;font-size:17px;line-height:1.9;color:var(--text-2);}
.article-content > *:first-child{margin-top:0;}
.article-content p{margin:0 0 20px;}
.article-content strong{color:var(--text);font-weight:700;}
.article-content h2{
  position:relative;font-size:clamp(23px,2.5vw,29px);line-height:1.3;font-weight:800;
  color:var(--text);margin:48px 0 18px;padding-left:16px;
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;border-radius:3px;
  background:var(--brand);box-shadow:var(--glow);
}
.article-content h3{font-size:22px;line-height:1.4;font-weight:700;color:var(--text);margin:34px 0 14px;}
.article-content h4{font-size:18px;font-weight:600;color:var(--text);margin:26px 0 12px;}
.article-content a{color:var(--brand);border-bottom:1px solid rgba(47,227,180,.35);}
.article-content a:hover{border-bottom-color:var(--brand);}
.article-content ul,.article-content ol{margin:0 0 22px;}
.article-content li{position:relative;padding-left:26px;margin-bottom:10px;}
.article-content ul > li::before{
  content:"";position:absolute;left:2px;top:.68em;width:7px;height:7px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 10px rgba(47,227,180,.5);
}
.article-content ol{counter-reset:art-ol;}
.article-content ol > li{counter-increment:art-ol;}
.article-content ol > li::before{
  content:counter(art-ol,decimal-leading-zero);
  position:absolute;left:0;top:.1em;font-family:var(--mono);font-size:13px;color:var(--brand);letter-spacing:.04em;
}
.article-content blockquote{
  margin:26px 0;padding:20px 24px;border-left:3px solid var(--brand);
  background:var(--surface-2);border-radius:0 var(--r-card) var(--r-card) 0;color:var(--text-2);
}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content img{
  display:block;margin:26px auto;border-radius:var(--r-card);
  border:1px solid var(--line);background:linear-gradient(140deg,var(--surface),var(--surface-2));
}
.article-content figure{margin:26px 0;}
.article-content figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px;letter-spacing:.04em;}
.article-content table{
  width:100%;margin:26px 0;border:1px solid var(--line);border-radius:var(--r-card);
  border-collapse:separate;border-spacing:0;overflow:hidden;font-size:15px;
}
.article-content th,.article-content td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line);}
.article-content th{background:var(--surface-2);color:var(--text);font-weight:700;font-size:14px;letter-spacing:.04em;}
.article-content tbody tr:nth-child(even){background:rgba(255,255,255,.03);}
.article-content tbody tr:last-child td{border-bottom:none;}
.article-content code{
  font-family:var(--mono);font-size:14px;color:var(--brand);
  background:var(--surface-2);border:1px solid var(--line);border-radius:6px;padding:2px 6px;
}
.article-content pre{
  background:#0F1216;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 20px;overflow-x:auto;margin:24px 0;
}
.article-content pre code{background:transparent;border:none;padding:0;color:#CFE9E1;}
.article-content hr{border:none;height:1px;background:var(--line);margin:40px 0;}

/* ---------- empty state ---------- */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  gap:14px;min-height:260px;padding:44px 26px;border:1px dashed var(--line);
  border-radius:var(--r-card);background:var(--surface);
}
.empty-state svg{width:38px;height:38px;color:var(--brand);}
.empty-state p{margin:0;font-size:16px;color:var(--text-2);}

/* ---------- tags ---------- */
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:48px;padding-top:26px;border-top:1px solid var(--line);}
.tag-row .tag-label{font-size:13px;color:var(--text-3);letter-spacing:.12em;}
.tag-badge{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;
  font-size:12px;color:var(--text-2);border:1px solid var(--line);background:rgba(255,255,255,.02);
  transition:border-color 220ms var(--ease),color 220ms var(--ease),background 220ms var(--ease);
}
.tag-badge:hover{border-color:var(--brand);color:var(--brand);background:rgba(47,227,180,.08);}

/* ---------- related ---------- */
.related-section{margin-top:64px;}
.section-eyebrow{
  display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:.18em;
  color:var(--brand);margin-bottom:10px;
}
.section-title{font-size:clamp(22px,2.4vw,28px);line-height:1.3;font-weight:800;}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:24px;}
.related-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;height:100%;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.related-card:hover{transform:translateY(-2px);border-color:rgba(47,227,180,.42);box-shadow:var(--glow);}
.related-thumb{aspect-ratio:16/10;width:100%;object-fit:cover;display:block;border-bottom:1px solid var(--line);background:linear-gradient(140deg,var(--surface),var(--surface-2));}
.related-body{padding:18px 20px 22px;}
.related-title{font-size:17px;font-weight:700;color:var(--text);line-height:1.5;}
.related-card:hover .related-title{color:var(--brand);}
.related-meta{margin-top:12px;font-size:13px;color:var(--text-3);font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* ---------- back row ---------- */
.back-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:52px;padding-top:28px;border-top:1px solid var(--line);}

/* ---------- sidebar ---------- */
.aside-col{position:relative;}
.side-sticky{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px;}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 22px 20px;
}
.side-title{font-size:14px;font-weight:700;letter-spacing:.12em;color:var(--text-3);margin-bottom:14px;text-transform:uppercase;}
.toc-list li{margin-bottom:10px;}
.toc-list a{
  display:block;font-size:14px;line-height:1.6;color:var(--text-2);
  padding-left:12px;border-left:2px solid transparent;transition:all 220ms var(--ease);
}
.toc-list a:hover{color:var(--brand);border-left-color:var(--brand);padding-left:16px;}
.side-links li{margin-bottom:10px;}
.side-links a{display:block;font-size:14px;color:var(--text-2);padding:4px 0;transition:all 220ms var(--ease);}
.side-links a:hover{color:var(--brand);transform:translateX(3px);}
.side-note{font-size:13px;color:var(--text-3);line-height:1.7;margin:0 0 14px;}

/* ---------- CTA band ---------- */
.cta-band{padding:0 0 96px;}
.cta-inner{
  position:relative;overflow:hidden;border:1px solid rgba(47,227,180,.4);border-radius:var(--r-card);
  padding:44px;display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
  background-image:linear-gradient(90deg,rgba(10,12,15,.94),rgba(10,12,15,.86)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
}
.cta-title{font-size:clamp(21px,2.4vw,27px);font-weight:800;line-height:1.35;}
.cta-text{margin:10px 0 0;font-size:15px;color:var(--text-2);max-width:560px;}

/* ---------- footer ---------- */
.site-footer{background:#08090B;border-top:1px solid var(--line);padding:64px 0 0;position:relative;z-index:2;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:800;color:var(--text);margin-bottom:16px;}
.footer-about{font-size:14px;line-height:1.8;color:var(--text-3);margin:0;max-width:340px;}
.footer-title{font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--text-3);margin-bottom:16px;text-transform:uppercase;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:14px;color:var(--text-2);display:inline-block;transition:all 220ms var(--ease);}
.footer-links a:hover{color:var(--brand);transform:translateX(2px);}
.footer-info li{display:flex;justify-content:space-between;gap:12px;font-size:14px;color:var(--text-3);margin-bottom:10px;}
.footer-info li span:last-child{color:var(--text-2);font-family:var(--mono);font-variant-numeric:tabular-nums;}
.footer-bottom{
  margin-top:48px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);letter-spacing:.04em;
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .desktop-nav{display:none;}
  .menu-toggle{display:inline-flex;}
  .article-content{max-width:100%;}
}
@media (max-width:991px){
  .article-main{padding:56px 0 72px;}
  .cta-band{padding-bottom:72px;}
  .cta-inner{padding:34px 26px;}
  .article-head .container{padding-top:26px;padding-bottom:34px;}
  .crumb-now{max-width:320px;}
}
@media (max-width:767px){
  .nav-wrap{min-height:60px;}
  .nav-actions .btn-brand{display:none;}
  .article-main{padding:44px 0 56px;}
  .article-content{font-size:16px;line-height:1.85;}
  .article-content h2{margin-top:38px;}
  .article-head::before{background-size:40px 40px;}
  .cta-band{padding-bottom:56px;}
  .cta-inner{padding:28px 22px;}
  .cta-inner .btn{width:100%;}
  .related-grid{grid-template-columns:1fr;}
  .side-sticky{position:static;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .page-title{font-size:30px;}
  .meta-row{font-size:12px;gap:10px;}
  .crumb-now{max-width:200px;}
  .article-content h3{font-size:20px;}
  .back-row .btn{width:100%;}
  .article-content table{font-size:14px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --bg:#0A0C0F;
  --surface:#14181D;
  --surface-2:#1B2027;
  --line:rgba(255,255,255,.08);
  --brand:#2FE3B4;
  --brand-2:#7A6BFF;
  --text:#F3F5F6;
  --text-2:#A9B2B9;
  --text-3:#6A737C;
  --glow:0 0 24px rgba(47,227,180,.18);
  --focus:0 0 0 3px rgba(47,227,180,.35);
  --r-card:14px;
  --r-btn:8px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-card)}
a{color:var(--brand);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--brand)}
p{margin:0 0 18px}
h1,h2,h3,h4{margin:0;letter-spacing:-.02em;color:var(--text);font-weight:800}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
::selection{background:rgba(47,227,180,.28);color:#fff}
.container{max-width:1160px;padding-left:20px;padding-right:20px;margin:0 auto}
@media (min-width:1400px){.container{max-width:1240px}}
.section{padding:96px 0}
.section-sm{padding:72px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand);font-family:var(--mono);margin-bottom:16px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--brand);display:block}
.h2{font-size:clamp(26px,3.4vw,40px);line-height:1.2;margin-bottom:14px}
.lead{color:var(--text-2);font-size:17px;line-height:1.85;max-width:680px;margin:0}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(10,12,15,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);transform-origin:left;
  transition:transform .4s var(--ease);
}
.site-header.scrolled::after{transform:scaleX(1)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.brand{
  display:inline-flex;align-items:center;gap:9px;
  font-size:19px;font-weight:800;letter-spacing:-.01em;
  color:var(--text);text-decoration:none;flex:0 0 auto;
}
.brand:hover{color:var(--text)}
.brand-dot{
  width:9px;height:9px;border-radius:2px;background:var(--brand);
  box-shadow:0 0 10px rgba(47,227,180,.85);
  transition:box-shadow .25s var(--ease),transform .25s var(--ease);
}
.brand:hover .brand-dot{box-shadow:0 0 18px rgba(47,227,180,1),0 0 30px rgba(47,227,180,.45);transform:scale(1.12)}
.desktop-nav{display:flex;align-items:center;gap:2px;flex:1 1 auto;justify-content:center}
.nav-link{
  position:relative;display:inline-block;
  font-size:15px;color:var(--text-2);padding:10px 12px;
  background:none;border:0;text-decoration:none;white-space:nowrap;
  transition:color .22s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .25s var(--ease);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--brand);text-shadow:0 0 12px rgba(47,227,180,.5)}
.nav-link.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.menu-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-btn);
  background:transparent;border:1px solid var(--line);color:var(--text);
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.menu-toggle svg{width:22px;height:22px}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- buttons ---------- */
.btn-brand,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;line-height:1;
  padding:14px 24px;border-radius:var(--r-btn);
  text-decoration:none;cursor:pointer;position:relative;overflow:hidden;
  transition:color .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.btn-brand{background:var(--brand);border:1px solid var(--brand);color:#0A0C0F}
.btn-brand:hover{color:#0A0C0F;filter:brightness(1.08);box-shadow:0 0 26px rgba(47,227,180,.3)}
.btn-brand::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(115deg,transparent 32%,rgba(255,255,255,.45) 50%,transparent 68%);
  transform:translateX(-130%);transition:transform .65s var(--ease);
}
.btn-brand:hover::after{transform:translateX(130%)}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--text)}
.btn-ghost:hover{color:var(--brand);border-color:var(--brand);box-shadow:var(--glow)}
.btn-brand:focus-visible,.btn-ghost:focus-visible,.menu-toggle:focus-visible,.nav-link:focus-visible{
  outline:none;box-shadow:var(--focus)
}
.btn-sm{padding:11px 18px;font-size:14px}
.btn-link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--brand);
}
.btn-link-arrow svg{width:16px;height:16px;transition:transform .22s var(--ease)}
.btn-link-arrow:hover svg{transform:translateX(4px)}

/* ---------- offcanvas ---------- */
.offcanvas{background:#08090B;color:var(--text);border-left:1px solid var(--line);width:min(88vw,360px)}
.offcanvas-header{border-bottom:1px solid var(--line);padding:20px 22px}
.offcanvas-body{padding:10px 22px 28px;display:flex;flex-direction:column;height:100%}
.mobile-nav a{
  display:block;font-size:20px;font-weight:700;color:var(--text-2);
  padding:16px 0;border-bottom:1px solid var(--line);text-decoration:none;
  transition:color .22s var(--ease),padding-left .22s var(--ease);
}
.mobile-nav a:hover{color:var(--text);padding-left:6px}
.mobile-nav a.active{color:var(--brand);text-shadow:0 0 12px rgba(47,227,180,.45)}
.mobile-cta{margin-top:auto;padding-top:26px}
.mobile-cta .btn-brand{width:100%}
.btn-close{filter:invert(1) grayscale(1);opacity:.7}
.btn-close:hover{opacity:1}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  min-height:400px;display:flex;align-items:flex-end;
  padding:80px 0 56px;
  border-bottom:1px solid var(--line);
}
.page-hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:.36;transform:scale(1.02);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,12,15,.72) 0%,rgba(10,12,15,.9) 58%,rgba(10,12,15,.99) 100%);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(180deg,#000,rgba(0,0,0,0));
  -webkit-mask-image:linear-gradient(180deg,#000,rgba(0,0,0,0));
}
.page-hero .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-3);margin-bottom:20px}
.crumb a{color:var(--text-3)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:rgba(255,255,255,.18)}
.crumb .now{color:var(--text-2)}
.page-hero h1{
  font-size:clamp(30px,4.4vw,50px);line-height:1.14;font-weight:800;
  max-width:820px;margin-bottom:18px;
}
.page-hero h1 em{font-style:normal;color:var(--brand);text-shadow:0 0 26px rgba(47,227,180,.35)}
.page-hero .hero-line{color:var(--text-2);font-size:17px;max-width:660px;margin:0}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;letter-spacing:.06em;padding:6px 13px;border-radius:999px;
  border:1px solid rgba(122,107,255,.42);background:rgba(122,107,255,.12);color:#C9C2FF;
  font-family:var(--mono);
}
.tag.tag-brand{border-color:rgba(47,227,180,.42);background:rgba(47,227,180,.1);color:var(--brand)}

/* ---------- steps ---------- */
.steps{position:relative;margin-top:8px}
.step{
  position:relative;
  display:grid;grid-template-columns:92px 1fr;gap:34px;
  padding:38px 0;
}
.step:not(:last-child)::after{
  content:"";position:absolute;left:45px;top:104px;bottom:-2px;width:1px;
  background:linear-gradient(180deg,rgba(47,227,180,.55),rgba(47,227,180,0));
}
.step-num{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:44px;font-weight:700;line-height:1;letter-spacing:-.03em;
  color:rgba(255,255,255,.16);
  transition:color .25s var(--ease),text-shadow .25s var(--ease);
}
.step:hover .step-num{color:var(--brand);text-shadow:0 0 22px rgba(47,227,180,.4)}
.step-body h3{font-size:22px;margin-bottom:12px}
.step-body>p{color:var(--text-2);max-width:640px;margin-bottom:16px}
.step-list{display:grid;gap:10px}
.step-list li{
  position:relative;padding-left:22px;color:var(--text-2);font-size:15.5px;line-height:1.75;
}
.step-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:8px;height:8px;border-radius:2px;
  background:rgba(47,227,180,.85);box-shadow:0 0 10px rgba(47,227,180,.45);
}

/* ---------- env cards ---------- */
.env-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:24px;margin-top:44px}
.env-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.env-card:hover{transform:translateY(-2px);border-color:rgba(47,227,180,.45);box-shadow:var(--glow)}
.env-media{aspect-ratio:16/10;overflow:hidden;background:linear-gradient(140deg,#1B2027,#101418)}
.env-media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.env-body{padding:24px 24px 28px}
.env-body h3{font-size:19px;margin:14px 0 10px}
.env-body p{color:var(--text-2);font-size:15px;line-height:1.8;margin:0}

/* ---------- checklist ---------- */
.check-wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.check-media{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  background:linear-gradient(140deg,#1B2027,#0E1216);position:relative;
}
.check-media img{aspect-ratio:4/3;object-fit:cover;border-radius:0;width:100%}
.check-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(47,227,180,.10),transparent 55%);
}
.check-list{display:grid;gap:14px;margin-top:26px}
.check-list li{
  position:relative;padding-left:38px;color:var(--text-2);font-size:15.5px;line-height:1.8;
}
.check-list li strong{display:block;color:var(--text);font-size:16.5px;font-weight:700;margin-bottom:2px}
.check-list li::before{
  content:"";position:absolute;left:0;top:4px;width:20px;height:20px;border-radius:6px;
  background:rgba(47,227,180,.12);border:1px solid rgba(47,227,180,.45);
}
.check-list li::after{
  content:"";position:absolute;left:6px;top:10px;width:7px;height:4px;
  border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(-45deg);
}

/* ---------- faq ---------- */
.faq-accordion{margin-top:40px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;
  transition:border-color .22s var(--ease);
}
.faq-item:hover{border-color:rgba(255,255,255,.16)}
.faq-item .accordion-button{
  background:transparent;color:var(--text);
  font-size:17px;font-weight:700;line-height:1.5;
  padding:20px 22px;display:flex;align-items:center;gap:16px;
  box-shadow:inset 2px 0 0 0 rgba(47,227,180,0);
  transition:box-shadow .22s var(--ease),color .22s var(--ease),background .22s var(--ease);
}
.faq-item .accordion-button:not(.collapsed){
  color:var(--brand);background:rgba(47,227,180,.045);
  box-shadow:inset 2px 0 0 0 var(--brand);
}
.faq-item .accordion-button:focus{outline:none;box-shadow:inset 2px 0 0 0 rgba(47,227,180,0)}
.faq-item .accordion-button:not(.collapsed):focus{box-shadow:inset 2px 0 0 0 var(--brand)}
.faq-item .accordion-button:focus-visible{outline:2px solid var(--brand);outline-offset:-3px}
.faq-index{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:15px;color:var(--text-3);flex:0 0 auto;
}
.faq-item .accordion-button:not(.collapsed) .faq-index{color:var(--brand)}
.faq-item .accordion-button::after{
  width:18px;height:18px;background-size:18px;margin-left:auto;flex:0 0 auto;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23A9B2B9' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
  transition:transform .25s cubic-bezier(.2,.7,.3,1);
}
.faq-item .accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232FE3B4' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
}
.faq-item .accordion-body{
  padding:0 22px 24px 60px;color:var(--text-2);font-size:15.5px;line-height:1.85;
}
.faq-item .accordion-body p:last-child{margin-bottom:0}

/* ---------- cta band ---------- */
.cta-band{padding:0 0 96px}
.cta-box{
  position:relative;overflow:hidden;
  border:1px solid rgba(47,227,180,.35);border-radius:18px;
  background:linear-gradient(120deg,rgba(47,227,180,.08),rgba(122,107,255,.08));
  padding:52px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-box::before{
  content:"";position:absolute;right:-60px;top:-70px;width:280px;height:280px;
  background:radial-gradient(circle,rgba(47,227,180,.22),transparent 68%);
}
.cta-box h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:10px;position:relative;z-index:1}
.cta-box p{color:var(--text-2);margin:0;max-width:560px;position:relative;z-index:1}
.cta-box .cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}

/* ---------- footer ---------- */
.site-footer{background:#08090B;border-top:1px solid var(--line);padding:70px 0 0;margin-top:0}
.footer-brand{display:inline-flex;align-items:center;gap:9px;font-size:18px;font-weight:800;color:var(--text);margin-bottom:16px}
.footer-about{color:var(--text-3);font-size:14px;line-height:1.8;margin:0;max-width:330px}
.footer-title{
  font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--text-3);
  margin-bottom:18px;text-transform:uppercase;
}
.footer-links{display:grid;gap:12px}
.footer-links a{color:var(--text-2);font-size:14.5px;display:inline-block;transition:color .22s var(--ease),transform .22s var(--ease)}
.footer-links a:hover{color:var(--brand);transform:translateX(2px)}
.footer-info{display:grid;gap:12px}
.footer-info li{display:flex;justify-content:space-between;gap:14px;font-size:14px;color:var(--text-2)}
.footer-info li span:first-child{color:var(--text-3)}
.footer-bottom{
  margin-top:56px;border-top:1px solid var(--line);padding:22px 0;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .check-wrap{gap:40px}
}
@media (max-width:991.98px){
  .desktop-nav{display:none}
  .menu-toggle{display:inline-flex}
  .section{padding:72px 0}
  .section-sm{padding:56px 0}
  .nav-wrap{height:64px}
  .page-hero{min-height:340px;padding:64px 0 44px}
  .check-wrap{grid-template-columns:1fr;gap:32px}
  .cta-band{padding:0 0 72px}
  .cta-box{padding:40px 32px}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .section{padding:52px 0}
  .section-sm{padding:44px 0}
  .nav-wrap{height:60px}
  .brand{font-size:17px}
  .page-hero{padding:52px 0 38px}
  .page-hero h1{font-size:clamp(28px,8vw,36px)}
  .step{grid-template-columns:1fr;gap:14px;padding:28px 0}
  .step:not(:last-child)::after{display:none}
  .step-num{font-size:34px}
  .faq-item .accordion-button{font-size:16px;padding:18px}
  .faq-item .accordion-body{padding:0 18px 20px 18px}
  .cta-box{padding:34px 24px;flex-direction:column;align-items:flex-start}
  .cta-box .cta-actions{width:100%}
  .cta-box .cta-actions .btn-brand,
  .cta-box .cta-actions .btn-ghost{width:100%}
  .btn-brand,.btn-ghost{min-height:46px}
  .footer-bottom{flex-direction:column;margin-top:40px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    transition-duration:.001ms !important;
    animation-duration:.001ms !important;
  }
}

/* roulang page: category2 */
:root{
  --bg:#0A0C0F;
  --surface:#14181D;
  --surface-2:#1B2027;
  --line:rgba(255,255,255,.08);
  --brand:#2FE3B4;
  --brand-2:#7A6BFF;
  --text:#F3F5F6;
  --text-2:#A9B2B9;
  --text-3:#6A737C;
  --glow:0 0 24px rgba(47,227,180,.18);
  --focus:0 0 0 3px rgba(47,227,180,.35);
  --radius:14px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:96px;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color 220ms var(--ease),border-color 220ms var(--ease),background-color 220ms var(--ease),transform 220ms var(--ease);}
a:hover{color:#63f2cd;}
h1,h2,h3,h4,h5{margin:0 0 16px;font-weight:800;letter-spacing:-.02em;line-height:1.2;}
p{margin:0 0 18px;color:var(--text-2);}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:6px;}
.num{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-variant-numeric:tabular-nums;}

.container{width:100%;max-width:1160px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:1400px){.container{max-width:1240px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(10,12,15,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:border-color 260ms var(--ease),box-shadow 260ms var(--ease);
}
.site-header.scrolled{border-bottom:2px solid transparent;border-image:linear-gradient(90deg,var(--brand),var(--brand-2)) 1;box-shadow:0 12px 30px rgba(0,0,0,.45);}
.nav-wrap{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:800;color:var(--text);letter-spacing:-.01em;}
.brand:hover{color:var(--text);}
.brand-dot{width:9px;height:9px;border-radius:3px;background:var(--brand);box-shadow:0 0 10px rgba(47,227,180,.6);transition:box-shadow 220ms var(--ease),transform 220ms var(--ease);flex:0 0 auto;}
.brand:hover .brand-dot{box-shadow:0 0 20px rgba(47,227,180,.95);transform:scale(1.15);}
.desktop-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:var(--text-2);
  border-radius:6px;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform 240ms var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand);text-shadow:0 0 12px rgba(47,227,180,.5);}
.nav-link.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.menu-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line);border-radius:8px;color:var(--text);cursor:pointer;
  transition:border-color 220ms var(--ease),color 220ms var(--ease);
}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand);}
.menu-toggle svg{width:22px;height:22px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;line-height:1.2;border-radius:8px;
  padding:12px 22px;border:1px solid transparent;cursor:pointer;
  transition:background-color 220ms var(--ease),color 220ms var(--ease),border-color 220ms var(--ease),transform 220ms var(--ease),box-shadow 220ms var(--ease);
}
.btn:focus-visible{outline:none;box-shadow:var(--focus);}
.btn-brand{background:var(--brand);color:#0A0C0F;position:relative;overflow:hidden;}
.btn-brand::before{
  content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 30%,rgba(255,255,255,.55) 50%,transparent 70%);
  transform:translateX(-120%);transition:transform 520ms var(--ease);
}
.btn-brand:hover{background:#48eec5;color:#0A0C0F;box-shadow:var(--glow);transform:translateY(-1px);}
.btn-brand:hover::before{transform:translateX(120%);}
.btn-brand span{position:relative;z-index:1;}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--glow);transform:translateY(-1px);}
.btn-sm{padding:10px 16px;font-size:14px;}
.btn-lg{padding:14px 28px;font-size:16px;}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:700;color:var(--brand);}
.link-arrow svg{width:16px;height:16px;transition:transform 220ms var(--ease);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ---------- offcanvas ---------- */
.offcanvas{background:#08090B;color:var(--text);border-left:1px solid var(--line);}
.offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px;}
.offcanvas-body{padding:8px 20px 28px;}
.m-nav-link{display:block;font-size:20px;font-weight:700;color:var(--text);padding:16px 0;border-bottom:1px solid var(--line);}
.m-nav-link:hover{color:var(--brand);}
.m-nav-link.active{color:var(--brand);}
.m-cta{margin-top:24px;}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  min-height:400px;
  display:flex;align-items:flex-end;
  padding:96px 0 52px;
  background-image:linear-gradient(180deg,rgba(10,12,15,.72) 0%,rgba(10,12,15,.9) 62%,#0A0C0F 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;right:8%;top:70px;width:1px;height:190px;
  background:linear-gradient(180deg,transparent,var(--brand),transparent);opacity:.7;
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-3);margin-bottom:18px;letter-spacing:.04em;}
.crumb span.sep{color:var(--text-3);opacity:.6;}
.crumb a{color:var(--text-3);}
.crumb a:hover{color:var(--brand);}
.crumb .now{color:var(--text-2);}
.page-hero h1{font-size:clamp(30px,4.4vw,46px);max-width:760px;margin-bottom:14px;}
.page-hero .lede{max-width:660px;font-size:17px;color:var(--text-2);margin-bottom:0;}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:12px;letter-spacing:.06em;color:var(--text-2);border:1px solid var(--line);background:rgba(47,227,180,.08);border-radius:999px;padding:6px 14px;}
.chip.accent{border-color:rgba(122,107,255,.45);background:rgba(122,107,255,.12);color:#c3bcff;}

/* ---------- section ---------- */
.section{padding:96px 0;}
.section-alt{background:#0C0F13;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(26px,3.4vw,38px);}
.section-head p{margin-bottom:0;font-size:16.5px;}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.14em;color:var(--brand);margin-bottom:12px;text-transform:uppercase;}

/* ---------- layout with side nav ---------- */
.feature-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:56px;align-items:start;}
.side-nav{
  position:sticky;top:104px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px 18px;
}
.side-nav h4{font-size:12px;letter-spacing:.14em;color:var(--text-3);font-weight:700;margin-bottom:14px;text-transform:uppercase;}
.side-nav a{
  display:block;padding:9px 12px;font-size:14.5px;color:var(--text-2);
  border-left:2px solid transparent;border-radius:0 8px 8px 0;
  transition:all 220ms var(--ease);
}
.side-nav a:hover{color:var(--text);background:var(--surface-2);border-left-color:var(--brand-2);}
.side-nav .to-top{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);color:var(--text-3);font-size:13.5px;}

/* ---------- feature rows ---------- */
.feature-row{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:44px;align-items:center;
  padding:46px 0;border-top:1px solid var(--line);
}
.feature-row:first-of-type{border-top:none;padding-top:0;}
.feature-row.rev .feature-media{order:-1;}
.feature-index{
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-variant-numeric:tabular-nums;
  font-size:13px;letter-spacing:.14em;color:var(--brand);margin-bottom:12px;display:block;
}
.feature-row h3{font-size:22px;margin-bottom:12px;}
.feature-row p{font-size:16px;margin-bottom:14px;}
.point-list li{position:relative;padding-left:22px;margin-bottom:10px;font-size:15px;color:var(--text-2);}
.point-list li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 8px rgba(47,227,180,.55);
}
.media-frame{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);
  background:linear-gradient(135deg,#1B2027,#14181D);
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.media-frame img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.media-frame:hover{transform:translateY(-2px);box-shadow:var(--glow);border-color:rgba(47,227,180,.35);}
.media-cap{font-size:13px;color:var(--text-3);margin-top:12px;}

/* ---------- availability cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;}
.info-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.info-card:hover{transform:translateY(-2px);box-shadow:var(--glow);border-color:rgba(47,227,180,.35);}
.info-card h3{font-size:19px;margin-bottom:10px;}
.info-card p{font-size:15px;margin-bottom:16px;}
.info-card .tag{display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--brand);border:1px solid rgba(47,227,180,.35);background:rgba(47,227,180,.1);border-radius:999px;padding:4px 12px;margin-bottom:14px;}
.info-card .tag.violet{color:#c3bcff;border-color:rgba(122,107,255,.45);background:rgba(122,107,255,.12);}
.mini-list li{font-size:14.5px;color:var(--text-2);padding-left:18px;position:relative;margin-bottom:8px;}
.mini-list li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:1px;background:var(--text-3);}
.info-card:hover .mini-list li::before{background:var(--brand);}

/* ---------- accordion ---------- */
.acc-wrap{max-width:900px;}
.accordion-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  margin-bottom:14px;overflow:hidden;transition:border-color 220ms var(--ease);
}
.accordion-item:has(.accordion-button:not(.collapsed)){border-color:rgba(47,227,180,.4);}
.accordion-button{
  display:flex;align-items:center;gap:16px;
  width:100%;background:var(--surface);color:var(--text);
  font-size:17px;font-weight:700;padding:20px 22px;border:none;border-radius:0;
  box-shadow:none;transition:background-color 220ms var(--ease),color 220ms var(--ease);
}
.accordion-button:not(.collapsed){background:var(--surface-2);color:var(--text);box-shadow:none;}
.accordion-button:focus{box-shadow:var(--focus);z-index:2;}
.accordion-button::after{
  margin-left:auto;flex:0 0 auto;
  width:14px;height:14px;background-image:none;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(45deg);transition:transform 240ms var(--ease);
}
.accordion-button:not(.collapsed)::after{transform:rotate(225deg);}
.acc-num{
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-variant-numeric:tabular-nums;
  font-size:14px;color:var(--text-3);letter-spacing:.06em;flex:0 0 auto;
}
.accordion-button:not(.collapsed) .acc-num{color:var(--brand);}
.accordion-body{padding:4px 22px 22px 52px;color:var(--text-2);font-size:15.5px;border-left:2px solid transparent;}
.accordion-item:has(.accordion-button:not(.collapsed)) .accordion-body{border-left-color:var(--brand);}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:18px;
  border:1px solid rgba(47,227,180,.35);
  padding:58px 44px;
  background-image:linear-gradient(120deg,rgba(10,12,15,.94),rgba(10,12,15,.78)),url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center;
}
.cta-band h2{font-size:clamp(24px,3vw,34px);max-width:620px;}
.cta-band p{max-width:600px;margin-bottom:26px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- footer ---------- */
.site-footer{background:#08090B;border-top:1px solid var(--line);padding:64px 0 0;margin-top:0;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:800;color:var(--text);margin-bottom:16px;}
.footer-about{font-size:14.5px;color:var(--text-2);max-width:340px;margin-bottom:0;line-height:1.8;}
.footer-title{font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--text-3);margin-bottom:18px;text-transform:uppercase;}
.footer-links li{margin-bottom:11px;}
.footer-links a{font-size:14.5px;color:var(--text-2);display:inline-block;}
.footer-links a:hover{color:var(--brand);transform:translateX(2px);}
.footer-info li{display:flex;justify-content:space-between;gap:12px;font-size:14px;color:var(--text-2);margin-bottom:11px;}
.footer-info li span:first-child{color:var(--text-3);}
.footer-info li span:last-child{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;font-variant-numeric:tabular-nums;}
.footer-bottom{
  margin-top:52px;border-top:1px solid var(--line);padding:22px 0;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .feature-layout{grid-template-columns:1fr;gap:36px;}
  .side-nav{position:static;}
}
@media (max-width:991.98px){
  .desktop-nav{display:none;}
  .menu-toggle{display:inline-flex;}
  .section{padding:72px 0;}
  .page-hero{padding:84px 0 44px;min-height:340px;}
  .feature-row{gap:32px;}
  .cta-band{padding:46px 28px;}
}
@media (max-width:767.98px){
  body{font-size:16px;}
  .container{padding-left:18px;padding-right:18px;}
  .nav-wrap{height:60px;}
  .brand{font-size:17px;}
  .nav-actions .btn-brand{display:none;}
  .section{padding:52px 0;}
  .page-hero{padding:76px 0 38px;min-height:auto;}
  .page-hero::after{display:none;}
  .feature-row{grid-template-columns:1fr;gap:22px;padding:34px 0;}
  .feature-row.rev .feature-media{order:0;}
  .btn-block-m{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-info li{font-size:13.5px;}
  .accordion-body{padding:4px 18px 20px 18px;}
  .accordion-button{font-size:16px;padding:18px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
}

/* roulang page: category3 */
:root{
  --bg:#0A0C0F;
  --surface:#14181D;
  --surface-2:#1B2027;
  --line:rgba(255,255,255,.08);
  --brand:#2FE3B4;
  --brand-2:#7A6BFF;
  --text:#F3F5F6;
  --text-2:#A9B2B9;
  --text-3:#6A737C;
  --glow:0 0 24px rgba(47,227,180,.18);
  --focus:0 0 0 3px rgba(47,227,180,.35);
  --radius:14px;
  --radius-sm:8px;
  --radius-xs:10px;
  --font-sans:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
  --section:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color 220ms var(--ease);}
a:hover{color:var(--brand);}
h1,h2,h3,h4{margin:0;font-family:var(--font-sans);letter-spacing:-.02em;color:var(--text);}
p{margin:0 0 16px;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:6px;}
.container{width:100%;max-width:1160px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:1400px){.container{max-width:1240px;}}
.section{padding:var(--section) 0;position:relative;}
.section-sm{padding:64px 0;}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--brand);
  text-transform:uppercase;
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--brand);display:inline-block;}
.h2{font-size:clamp(26px,3.4vw,40px);line-height:1.2;font-weight:800;}
.lead{font-size:17px;line-height:1.85;color:var(--text-2);max-width:720px;}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px;}
.hr-neon{height:1px;background:linear-gradient(90deg,transparent,rgba(47,227,180,.45),transparent);border:0;margin:0;}

/* ============ Header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(10,12,15,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 320ms var(--ease);
}
.site-header.scrolled::after{transform:scaleX(1);}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:19px;
  font-weight:800;
  color:var(--text);
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand:hover{color:var(--text);}
.brand-dot{
  width:9px;height:9px;
  border-radius:2px;
  background:var(--brand);
  box-shadow:0 0 10px rgba(47,227,180,.7);
  flex:0 0 auto;
  transition:box-shadow 220ms var(--ease),transform 220ms var(--ease);
}
.brand:hover .brand-dot{box-shadow:0 0 20px rgba(47,227,180,1);transform:scale(1.15);}
.desktop-nav{display:flex;align-items:center;gap:2px;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:15px;
  color:var(--text-2);
  border-radius:8px;
  transition:color 220ms var(--ease);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:4px;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 220ms var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand);text-shadow:0 0 12px rgba(47,227,180,.5);}
.nav-link.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:10px;}
.menu-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  background:transparent;
  border:1px solid var(--line);
  border-radius:8px;
  color:var(--text);
  cursor:pointer;
  transition:border-color 220ms var(--ease),color 220ms var(--ease);
}
.menu-toggle svg{width:22px;height:22px;}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand);}
@media (max-width:991px){
  .desktop-nav{display:none;}
  .menu-toggle{display:inline-flex;}
  .nav-wrap{height:60px;}
  .nav-actions .btn-brand{display:none;}
}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--radius-sm);
  border:1px solid transparent;
  cursor:pointer;
  transition:background 220ms var(--ease),color 220ms var(--ease),border-color 220ms var(--ease),transform 220ms var(--ease),box-shadow 220ms var(--ease);
  min-height:44px;
  line-height:1.2;
}
.btn-brand{
  position:relative;
  overflow:hidden;
  background:var(--brand);
  color:#0A0C0F;
  border-color:var(--brand);
}
.btn-brand::after{
  content:"";
  position:absolute;
  top:0;left:-120%;
  width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);
  transition:left 520ms var(--ease);
}
.btn-brand:hover{color:#0A0C0F;box-shadow:var(--glow);transform:translateY(-1px);}
.btn-brand:hover::after{left:130%;}
.btn-ghost{
  background:transparent;
  color:var(--text);
  border-color:var(--line);
}
.btn-ghost:hover{color:var(--brand);border-color:var(--brand);box-shadow:var(--glow);transform:translateY(-1px);}
.btn-sm{padding:9px 16px;font-size:14px;min-height:40px;}
.btn:focus-visible{box-shadow:var(--focus);}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

.text-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  color:var(--brand);
}
.text-link .arrow{transition:transform 220ms var(--ease);display:inline-block;}
.text-link:hover .arrow{transform:translateX(5px);}
.text-link:hover{color:var(--brand);}

/* ============ Badges ============ */
.badge-pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.04em;
  line-height:1.5;
  color:var(--brand);
  background:rgba(47,227,180,.12);
  border:1px solid rgba(47,227,180,.45);
}
.badge-pill.violet{
  color:#BEB6FF;
  background:rgba(122,107,255,.12);
  border-color:rgba(122,107,255,.45);
}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  min-height:400px;
  display:flex;
  align-items:flex-end;
  padding:110px 0 54px;
  background-image:
    linear-gradient(180deg,rgba(10,12,15,.72) 0%,rgba(10,12,15,.9) 62%,var(--bg) 100%),
    linear-gradient(90deg,rgba(10,12,15,.9) 0%,rgba(10,12,15,.45) 60%,rgba(10,12,15,.75) 100%),
    url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.5;
  pointer-events:none;
}
.page-hero::after{
  content:"";
  position:absolute;
  top:0;bottom:0;left:12%;
  width:1px;
  background:linear-gradient(180deg,transparent,rgba(47,227,180,.55),transparent);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.crumb{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:20px;
}
.crumb a{color:var(--text-3);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--text-3);opacity:.6;}
.page-hero h1{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.14;
  font-weight:800;
  max-width:880px;
  margin-bottom:16px;
}
.page-hero .hero-note{
  font-size:17px;
  color:var(--text-2);
  max-width:620px;
  margin-bottom:0;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}

/* ============ Matrix table ============ */
.matrix-wrap{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface);
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}
table.matrix{
  width:100%;
  min-width:780px;
  border-collapse:collapse;
}
table.matrix thead th{
  text-align:left;
  padding:16px 22px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--brand);
  background:var(--surface-2);
  border-bottom:1px solid rgba(47,227,180,.35);
  white-space:nowrap;
}
table.matrix tbody td{
  padding:20px 22px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
table.matrix tbody tr:nth-child(even){background:rgba(255,255,255,.03);}
table.matrix tbody tr:hover{background:var(--surface-2);}
table.matrix tbody tr:last-child td{border-bottom:0;}
table.matrix td.scene{
  color:var(--text);
  font-weight:700;
  font-size:16px;
  white-space:nowrap;
}
table.matrix td.scene span{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--text-3);
  letter-spacing:.1em;
  font-weight:400;
  margin-top:4px;
}
.matrix-hint{font-size:13px;color:var(--text-3);margin-top:14px;}

/* ============ Compare ============ */
.compare-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.compare-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.compare-card:hover{transform:translateY(-2px);box-shadow:var(--glow);border-color:rgba(47,227,180,.4);}
.compare-card .cc-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px;}
.compare-card h3{font-size:22px;font-weight:700;}
.compare-card .cc-icon{
  width:42px;height:42px;
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(47,227,180,.35);
  background:rgba(47,227,180,.08);
  color:var(--brand);
}
.compare-card.violet .cc-icon{border-color:rgba(122,107,255,.4);background:rgba(122,107,255,.1);color:#BEB6FF;}
.compare-list li{
  position:relative;
  padding-left:20px;
  margin-bottom:12px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
}
.compare-list li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--brand);
  opacity:.85;
}
.compare-card.violet .compare-list li::before{background:var(--brand-2);}
.compare-card .cc-foot{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}

/* ============ Scene cards ============ */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:24px;
}
.scene-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--glow);border-color:rgba(47,227,180,.4);}
.scene-thumb{
  position:relative;
  aspect-ratio:16/10;
  background:linear-gradient(135deg,var(--surface-2),#101418);
  overflow:hidden;
}
.scene-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease);}
.scene-card:hover .scene-thumb img{transform:scale(1.04);}
.scene-thumb::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,12,15,.05),rgba(10,12,15,.68));
}
.scene-body{padding:24px 26px 26px;display:flex;flex-direction:column;flex:1;}
.scene-body h3{font-size:18px;font-weight:700;margin-bottom:10px;transition:color 220ms var(--ease);}
.scene-card:hover .scene-body h3{color:var(--brand);}
.scene-body p{font-size:14px;line-height:1.8;color:var(--text-2);margin-bottom:18px;}
.scene-body .text-link{margin-top:auto;font-size:14px;}

/* ============ Check strip ============ */
.check-strip{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:20px;
}
.check-item{
  border:1px solid var(--line);
  border-left:2px solid var(--brand);
  border-radius:var(--radius);
  background:var(--surface);
  padding:24px 26px;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease);
}
.check-item:hover{transform:translateY(-2px);box-shadow:var(--glow);}
.check-item .num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:13px;
  letter-spacing:.12em;
  color:var(--brand);
  display:block;
  margin-bottom:10px;
}
.check-item h3{font-size:17px;font-weight:700;margin-bottom:8px;}
.check-item p{font-size:14px;color:var(--text-2);margin:0;line-height:1.8;}

/* ============ FAQ ============ */
.faq .accordion-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  margin-bottom:12px;
  overflow:hidden;
}
.faq .accordion-item:last-child{margin-bottom:0;}
.faq .accordion-button{
  position:relative;
  width:100%;
  background:transparent;
  color:var(--text);
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  padding:20px 60px 20px 26px;
  box-shadow:none;
  border:0;
}
.faq .accordion-button:not(.collapsed){
  color:var(--brand);
  background:var(--surface-2);
}
.faq .accordion-button::before{
  content:"";
  position:absolute;
  left:0;top:14px;bottom:14px;
  width:2px;
  background:var(--brand);
  transform:scaleY(0);
  transform-origin:top center;
  transition:transform 220ms var(--ease);
}
.faq .accordion-button:not(.collapsed)::before{transform:scaleY(1);}
.faq .accordion-button::after{
  content:"";
  position:absolute;
  right:28px;top:50%;
  width:9px;height:9px;
  margin:0;
  background-image:none;
  border-right:2px solid var(--text-3);
  border-bottom:2px solid var(--text-3);
  transform:translateY(-70%) rotate(45deg);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{
  border-color:var(--brand);
  transform:translateY(-30%) rotate(-135deg);
}
.faq .accordion-button:focus{box-shadow:var(--focus);border-radius:var(--radius);}
.faq .accordion-body{
  padding:0 26px 24px;
  font-size:15px;
  line-height:1.88;
  color:var(--text-2);
  background:var(--surface-2);
}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  border:1px solid rgba(47,227,180,.35);
  border-radius:var(--radius);
  padding:56px 48px;
  background-image:
    linear-gradient(90deg,rgba(10,12,15,.94) 0%,rgba(10,12,15,.82) 55%,rgba(10,12,15,.92) 100%),
    url('/assets/images/backpic/back-3.webp');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-60px;top:-60px;
  width:220px;height:220px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,227,180,.22),transparent 68%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(24px,3vw,34px);line-height:1.25;font-weight:800;margin-bottom:12px;}
.cta-band p{font-size:16px;color:var(--text-2);max-width:600px;margin-bottom:26px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:2;}

/* ============ Offcanvas ============ */
.mobile-panel{background:#050608;color:var(--text);width:320px;}
.mobile-panel .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px;}
.mobile-panel .btn-close{filter:invert(1) grayscale(1);opacity:.65;}
.mobile-panel .offcanvas-body{padding:20px;display:flex;flex-direction:column;gap:20px;}
.mobile-nav{display:flex;flex-direction:column;}
.mobile-nav a{
  font-size:20px;
  font-weight:600;
  color:var(--text-2);
  padding:16px 0;
  border-bottom:1px solid var(--line);
}
.mobile-nav a.active{color:var(--brand);text-shadow:0 0 12px rgba(47,227,180,.5);}
.mobile-nav a:hover{color:var(--brand);}

/* ============ Footer ============ */
.site-footer{
  background:#08090B;
  border-top:1px solid var(--line);
  padding:72px 0 0;
  margin-top:0;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  font-weight:800;
  color:var(--text);
  margin-bottom:16px;
}
.footer-about{font-size:14px;line-height:1.85;color:var(--text-3);max-width:340px;margin:0;}
.footer-title{
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--text-3);
  margin-bottom:18px;
}
.footer-links li{margin-bottom:12px;}
.footer-links a{font-size:14px;color:var(--text-2);display:inline-block;transition:color 220ms var(--ease),transform 220ms var(--ease);}
.footer-links a:hover{color:var(--brand);transform:translateX(2px);}
.footer-info li{
  display:flex;
  justify-content:space-between;
  gap:12px;
  font-size:14px;
  color:var(--text-2);
  padding:9px 0;
  border-bottom:1px dashed rgba(255,255,255,.06);
}
.footer-info li span:first-child{color:var(--text-3);}
.footer-info li span:last-child{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:13px;}
.footer-bottom{
  margin-top:56px;
  padding:22px 0;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
}

/* ============ Responsive ============ */
@media (max-width:1199px){
  :root{--section:80px;}
}
@media (max-width:991px){
  :root{--section:72px;}
  .page-hero{min-height:360px;padding:96px 0 46px;}
  .compare-grid{grid-template-columns:1fr;}
  .cta-band{padding:44px 30px;}
}
@media (max-width:767px){
  :root{--section:52px;}
  body{font-size:15.5px;}
  .page-hero{min-height:340px;padding:88px 0 40px;}
  .page-hero h1{font-size:clamp(26px,7vw,34px);}
  .section-head{margin-bottom:28px;}
  .compare-card{padding:22px;}
  .scene-body{padding:20px 20px 22px;}
  .cta-band{padding:36px 22px;}
  .cta-actions .btn{width:100%;}
  .hero-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .page-hero h1{font-size:26px;}
  .hero-tags{gap:8px;}
  .badge-pill{font-size:11.5px;}
  .check-item{padding:20px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category4 */
:root{
  --bg:#0A0C0F;
  --surface:#14181D;
  --surface-2:#1B2027;
  --line:rgba(255,255,255,.08);
  --brand:#2FE3B4;
  --brand-2:#7A6BFF;
  --text:#F3F5F6;
  --text-2:#A9B2B9;
  --text-3:#6A737C;
  --glow:0 0 24px rgba(47,227,180,.18);
  --focus:0 0 0 3px rgba(47,227,180,.35);
  --radius:14px;
  --radius-btn:8px;
  --radius-input:10px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color 220ms var(--ease);}
a:hover{color:var(--text);}
h1,h2,h3,h4,h5{margin:0;font-weight:800;letter-spacing:-.02em;color:var(--text);}
h1{font-size:clamp(34px,5.2vw,60px);line-height:1.1;}
h2{font-size:clamp(26px,3.4vw,40px);line-height:1.2;}
h3{font-size:22px;line-height:1.35;font-weight:700;}
h4{font-size:18px;line-height:1.4;font-weight:600;}
p{margin:0 0 18px;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
::selection{background:rgba(47,227,180,.28);color:#fff;}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:6px;}

.container{max-width:1160px;padding-left:20px;padding-right:20px;margin:0 auto;}
@media (min-width:1400px){.container{max-width:1240px;}}

.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(10,12,15,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:border-color 220ms var(--ease);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);transform-origin:left;
  transition:transform 320ms var(--ease);
}
.site-header.is-scrolled::after{transform:scaleX(1);}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;height:72px;
}
.brand{
  display:inline-flex;align-items:center;gap:8px;
  font-size:19px;font-weight:800;color:var(--text);letter-spacing:-.01em;
  white-space:nowrap;
}
.brand:hover{color:var(--text);}
.brand-dot{
  width:9px;height:9px;border-radius:3px;background:var(--brand);
  box-shadow:0 0 10px rgba(47,227,180,.55);
  transition:box-shadow 220ms var(--ease),transform 220ms var(--ease);
  flex:0 0 auto;
}
.brand:hover .brand-dot{box-shadow:0 0 18px rgba(47,227,180,.95);transform:scale(1.12);}
.footer-brand .brand-dot{width:8px;height:8px;}
.desktop-nav{display:flex;align-items:center;gap:26px;}
.nav-link{
  position:relative;font-size:15px;color:var(--text-2);padding:6px 0;
  transition:color 220ms var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform 220ms var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{
  color:var(--brand);
  text-shadow:0 0 12px rgba(47,227,180,.5);
}
.nav-link.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.menu-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line);border-radius:var(--radius-btn);
  color:var(--text);cursor:pointer;transition:border-color 220ms var(--ease),color 220ms var(--ease);
}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand);}
.menu-toggle svg{width:20px;height:20px;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;line-height:1.2;border:1px solid transparent;
  cursor:pointer;position:relative;overflow:hidden;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),
             border-color 220ms var(--ease),color 220ms var(--ease),background-color 220ms var(--ease);
}
.btn:focus-visible{box-shadow:var(--focus);}
.btn-brand{background:var(--brand);color:#0A0C0F;border-color:var(--brand);}
.btn-brand::before{
  content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 30%,rgba(255,255,255,.55),transparent 70%);
  transform:translateX(-120%);transition:transform 520ms var(--ease);
}
.btn-brand:hover{color:#0A0C0F;transform:translateY(-2px);box-shadow:0 0 22px rgba(47,227,180,.32);}
.btn-brand:hover::before{transform:translateX(120%);}
.btn-brand span{position:relative;z-index:1;}
.btn-ghost{
  background:transparent;color:var(--text);border-color:var(--line);
}
.btn-ghost:hover{color:var(--brand);border-color:var(--brand);box-shadow:var(--glow);transform:translateY(-2px);}
.btn-sm{min-height:40px;padding:9px 18px;font-size:14px;}
.btn-block{width:100%;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:700;color:var(--brand);
}
.link-arrow svg{width:16px;height:16px;transition:transform 220ms var(--ease);}
.link-arrow:hover{color:var(--brand);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ---------- Badges ---------- */
.badge-neon{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:12px;font-weight:700;
  letter-spacing:.04em;
  border:1px solid rgba(122,107,255,.5);background:rgba(122,107,255,.12);color:#B9B1FF;
}
.badge-mint{
  border-color:rgba(47,227,180,.5);background:rgba(47,227,180,.12);color:var(--brand);
}

/* ---------- Sections ---------- */
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);display:inline-block;}
.lead{font-size:17px;color:var(--text-2);max-width:660px;margin-top:16px;margin-bottom:0;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  min-height:400px;
  display:flex;align-items:flex-end;
  padding:120px 0 56px;
  overflow:hidden;
  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:.42;
}
.page-hero .hero-veil{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(10,12,15,.72) 0%,rgba(10,12,15,.94) 62%,var(--bg) 100%),
    linear-gradient(90deg,rgba(10,12,15,.9) 0%,rgba(10,12,15,.35) 70%);
}
.page-hero .hero-grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 82%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 82%);
}
.page-hero .hero-inner{position:relative;z-index:2;max-width:820px;}
.breadcrumb-line{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);margin-bottom:18px;
}
.breadcrumb-line a{color:var(--text-3);}
.breadcrumb-line a:hover{color:var(--brand);}
.breadcrumb-line .sep{color:rgba(255,255,255,.2);}
.breadcrumb-line .current{color:var(--text-2);}
.page-hero h1{margin-bottom:16px;}
.page-hero h1 .hl{color:var(--brand);text-shadow:0 0 26px rgba(47,227,180,.28);}
.page-hero p{color:var(--text-2);font-size:17px;max-width:640px;margin-bottom:0;}

/* ---------- QA Cards ---------- */
.qa-grid{
  display:grid;gap:20px;
  grid-template-columns:repeat(auto-fit,minmax(290px,1fr));
}
.qa-card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px;
  display:flex;flex-direction:column;gap:12px;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.qa-card::after{
  content:"";position:absolute;left:28px;right:28px;top:0;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);transform-origin:left;
  transition:transform 260ms var(--ease);
  border-radius:2px;
}
.qa-card:hover{transform:translateY(-2px);box-shadow:var(--glow);border-color:rgba(47,227,180,.4);}
.qa-card:hover::after{transform:scaleX(1);}
.qa-card:hover h3{color:var(--brand);}
.qa-card h3{font-size:18px;transition:color 220ms var(--ease);}
.qa-card p{font-size:14.5px;line-height:1.75;color:var(--text-2);margin:0;}
.qa-num{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:12px;letter-spacing:.14em;color:var(--text-3);
}
.qa-icon{
  width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(47,227,180,.35);background:rgba(47,227,180,.08);color:var(--brand);
}
.qa-icon svg{width:18px;height:18px;}

/* ---------- Focus block ---------- */
.focus-block{
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
}
.focus-media{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);
  aspect-ratio:16/11;
  background:linear-gradient(140deg,var(--surface-2),#0E1217);
}
.focus-media img{width:100%;height:100%;object-fit:cover;}
.focus-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,12,15,.05),rgba(10,12,15,.62));
}
.check-list{display:flex;flex-direction:column;gap:14px;margin-top:26px;}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:var(--text-2);}
.check-list li svg{width:18px;height:18px;color:var(--brand);flex:0 0 auto;margin-top:5px;}
.check-list li strong{color:var(--text);font-weight:700;}

/* ---------- Accordion ---------- */
.faq-accordion{display:flex;flex-direction:column;gap:14px;}
.qa-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  transition:border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.qa-item:hover{border-color:rgba(47,227,180,.3);}
.qa-item .accordion-button{
  position:relative;
  display:flex;align-items:center;gap:18px;width:100%;
  padding:22px 26px 22px 30px;
  background:transparent;border:0;text-align:left;
  color:var(--text);font-size:17px;font-weight:700;line-height:1.5;
  box-shadow:none;
  transition:color 220ms var(--ease),background-color 220ms var(--ease);
}
.qa-item .accordion-button::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:2px;
  background:var(--brand);border-radius:2px;
  transform:scaleY(0);transform-origin:top;
  transition:transform 260ms var(--ease);
}
.qa-item .accordion-button::after{display:none;}
.qa-item .accordion-button:not(.collapsed){color:var(--brand);background:rgba(47,227,180,.04);}
.qa-item .accordion-button:not(.collapsed)::before{transform:scaleY(1);}
.qa-item .accordion-button:focus{box-shadow:none;}
.qa-item .accordion-button:focus-visible{box-shadow:var(--focus);}
.q-idx{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:13px;color:var(--text-3);flex:0 0 auto;letter-spacing:.08em;
}
.qa-item .accordion-button:not(.collapsed) .q-idx{color:var(--brand);}
.q-text{flex:1 1 auto;}
.q-toggle{
  flex:0 0 auto;width:26px;height:26px;color:var(--text-3);
  transition:transform 260ms var(--ease),color 220ms var(--ease);
}
.qa-item .accordion-button:not(.collapsed) .q-toggle{transform:rotate(45deg);color:var(--brand);}
.qa-item .accordion-body{
  padding:0 26px 26px 30px;
  font-size:15.5px;color:var(--text-2);
}
.qa-item .accordion-body p:last-child{margin-bottom:0;}
.qa-item .accordion-body .tip{
  display:block;margin-top:14px;padding:14px 16px;
  border-left:3px solid var(--brand-2);
  background:var(--surface-2);border-radius:0 10px 10px 0;
  font-size:14px;color:var(--text-2);
}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border:1px solid rgba(47,227,180,.32);
  border-radius:var(--radius);
  padding:52px 44px;
  background:var(--surface);
}
.cta-band .cta-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  opacity:.22;
}
.cta-band .cta-veil{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(10,12,15,.94) 12%,rgba(10,12,15,.7) 100%);
}
.cta-band .cta-inner{
  position:relative;z-index:2;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(22px,2.6vw,32px);margin-bottom:10px;}
.cta-band p{color:var(--text-2);margin:0;font-size:15.5px;}

/* ---------- Back row ---------- */
.back-row{
  display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;
  padding:12px 0 0;
}

/* ---------- Footer ---------- */
.site-footer{
  background:#08090B;
  border-top:1px solid var(--line);
  padding:72px 0 0;
  margin-top:24px;
}
.footer-brand{
  display:inline-flex;align-items:center;gap:8px;
  font-size:18px;font-weight:800;color:var(--text);margin-bottom:14px;
}
.footer-about{font-size:14px;color:var(--text-3);line-height:1.8;margin:0;max-width:340px;}
.footer-title{
  font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--text-3);
  margin-bottom:18px;
}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{
  font-size:14px;color:var(--text-2);
  transition:color 220ms var(--ease),transform 220ms var(--ease);
  display:inline-block;
}
.footer-links a:hover{color:var(--brand);transform:translateX(2px);}
.footer-info{display:flex;flex-direction:column;gap:12px;}
.footer-info li{
  display:flex;justify-content:space-between;gap:12px;font-size:14px;color:var(--text-2);
}
.footer-info li span:first-child{color:var(--text-3);}
.footer-info li span:last-child{font-family:var(--mono);font-variant-numeric:tabular-nums;}
.footer-bottom{
  margin-top:56px;padding:22px 0;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ---------- Offcanvas ---------- */
.offcanvas.offcanvas-mobile{
  background:#05060820;
  background:#050608;
  color:var(--text);
  width:min(340px,86vw);
  border-right:1px solid var(--line);
}
.offcanvas-mobile .offcanvas-header{
  border-bottom:1px solid var(--line);
  padding:20px 22px;
}
.offcanvas-mobile .offcanvas-body{padding:18px 22px 32px;display:flex;flex-direction:column;gap:4px;}
.offcanvas-mobile .m-link{
  display:block;font-size:20px;font-weight:700;color:var(--text);
  padding:16px 0;border-bottom:1px solid var(--line);
  transition:color 220ms var(--ease),padding-left 220ms var(--ease);
}
.offcanvas-mobile .m-link:hover{color:var(--brand);padding-left:6px;}
.offcanvas-mobile .m-link.active{color:var(--brand);}
.offcanvas-mobile .m-cta{margin-top:26px;}
.btn-close-neon{
  width:40px;height:40px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:transparent;color:var(--text-2);display:flex;align-items:center;justify-content:center;
  transition:border-color 220ms var(--ease),color 220ms var(--ease);
}
.btn-close-neon:hover{border-color:var(--brand);color:var(--brand);}
.btn-close-neon svg{width:18px;height:18px;}

/* ---------- Responsive ---------- */
@media (max-width:1199.98px){
  .desktop-nav{gap:18px;}
  .nav-link{font-size:14px;}
}
@media (max-width:991.98px){
  .desktop-nav{display:none;}
  .menu-toggle{display:flex;}
  .nav-wrap{height:64px;}
  .section{padding:72px 0;}
  .focus-block{grid-template-columns:1fr;gap:32px;}
  .page-hero{padding:104px 0 44px;min-height:360px;}
  .cta-band{padding:40px 30px;}
}
@media (max-width:767.98px){
  body{font-size:16px;}
  .section{padding:52px 0;}
  .section-tight{padding:44px 0;}
  .page-hero{padding:96px 0 40px;}
  .page-hero p{font-size:16px;}
  .nav-actions .btn-brand{display:none;}
  .qa-card{padding:22px;}
  .qa-item .accordion-button{padding:18px 18px 18px 24px;font-size:16px;gap:12px;}
  .qa-item .accordion-body{padding:0 18px 22px 24px;}
  .back-row .btn{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:519.98px){
  .brand{font-size:17px;}
  .cta-band{padding:32px 20px;}
  .cta-band .cta-inner .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}