/* roulang page: index */
:root{
  --ink:#101312;
  --ink-soft:#1B201E;
  --lime:#C9F24D;
  --lime-deep:#9DC42A;
  --graphite:#3B4145;
  --gray:#8A8F8C;
  --paper:#F6F5F1;
  --line:#E4E2DB;
  --white:#FFFFFF;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --sh-1:0 1px 2px rgba(16,19,18,.04);
  --sh-2:0 12px 32px -12px rgba(16,19,18,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Space Grotesk","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}
::selection{background:var(--lime);color:var(--ink)}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 var(--r-sm) 0;z-index:200}
.skip:focus{left:0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.scrolled{box-shadow:0 10px 26px -20px rgba(16,19,18,.55)}
.nav{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:24px;height:24px;border-radius:7px;background:var(--ink);
  display:grid;place-items:center;flex:none;
}
.brand-text{font-weight:700;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;margin-left:6px}
.nav-links a{
  position:relative;display:flex;align-items:center;height:64px;padding:0 13px;
  font-size:15px;color:var(--graphite);transition:color .16s var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:0;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--ink);font-weight:600}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.search{position:relative;width:180px;transition:width .24s var(--ease)}
.search:focus-within{width:240px}
.search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--gray);pointer-events:none}
.search input{
  width:100%;height:38px;border:1px solid var(--line);border-radius:999px;
  background:#fff;padding:0 14px 0 36px;font-size:14px;
  transition:border-color .16s var(--ease);
}
.search input::placeholder{color:var(--gray)}
.search input:focus{outline:none;border-color:var(--ink)}
.link-btn{
  display:inline-flex;align-items:center;height:38px;padding:0 12px;border-radius:999px;
  font-size:15px;color:var(--graphite);transition:color .16s var(--ease),background .16s var(--ease);
}
.link-btn:hover{color:var(--ink);background:rgba(16,19,18,.05)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  align-items:center;justify-content:center;background:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* drawer */
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,19,18,.45);opacity:0;visibility:hidden;
  transition:opacity .2s var(--ease),visibility .2s;z-index:90;
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);background:var(--paper);
  z-index:100;transform:translateX(102%);transition:transform .26s var(--ease);
  padding:20px;display:flex;flex-direction:column;gap:8px;overflow-y:auto;
  border-left:1px solid var(--line);
}
.drawer.open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-close{width:44px;height:44px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;background:#fff;font-size:18px;line-height:1}
.drawer a.drawer-link{
  display:flex;align-items:center;min-height:48px;padding:0 14px;border-radius:var(--r-md);
  font-size:16px;color:var(--graphite);border:1px solid transparent;
}
.drawer a.drawer-link:hover,.drawer a.drawer-link.active{background:#fff;border-color:var(--line);color:var(--ink)}
.drawer .search{width:100%;margin:12px 0}
.drawer .search:focus-within{width:100%}
.drawer-actions{display:flex;flex-direction:column;gap:10px;margin-top:8px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:999px;border:1px solid transparent;
  font-weight:600;font-size:15px;cursor:pointer;white-space:nowrap;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.btn-primary{background:var(--lime);color:var(--ink);box-shadow:var(--sh-1)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 24px -14px rgba(16,19,18,.5)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-1px);background:#fff}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{transform:translateY(-1px);background:#000}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn-block{width:100%}
.btn svg{flex:none}

/* ---------- hero ---------- */
.hero{padding:72px 0 88px;border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.03fr .97fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding-left:10px;
  border-left:2px solid var(--lime);font-size:12px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--graphite);
}
.hero h1{
  font-size:clamp(32px,4.6vw,54px);line-height:1.08;letter-spacing:-.02em;
  font-weight:800;margin-top:18px;
}
.hero-sub{font-size:17px;color:var(--graphite);margin-top:18px;max-width:56ch}
.hero-cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.stats{display:flex;margin-top:44px;flex-wrap:wrap;gap:0}
.stat{padding:0 24px;border-left:1px solid var(--line)}
.stat:first-child{padding-left:0;border-left:none}
.stat b{display:block;font-size:20px;font-weight:700;letter-spacing:-.01em;line-height:1.4}
.stat span{font-size:13px;color:var(--gray)}
.hero-visual{position:relative}
.hero-shot{
  position:relative;margin:0;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh-2);background:var(--ink);
}
.hero-shot img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-shot-mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(16,19,18,.12) 0%,rgba(16,19,18,.74) 100%);
}
.hero-shot-badge{
  position:absolute;left:20px;right:20px;bottom:18px;
  display:flex;align-items:center;gap:10px;color:#fff;font-size:13px;letter-spacing:.02em;
}
.pulse{width:8px;height:8px;border-radius:50%;background:var(--lime);flex:none;box-shadow:0 0 0 4px rgba(201,242,77,.22)}
.hero-note{
  position:absolute;top:18px;left:18px;background:rgba(246,245,241,.94);
  border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:12px;
  letter-spacing:.06em;color:var(--graphite);
}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section.tight{padding:72px 0}
.section-head{max-width:720px;margin-bottom:44px}
.section-head h2{
  font-size:clamp(24px,3vw,34px);line-height:1.2;font-weight:800;
  letter-spacing:-.015em;margin-top:14px;
}
.section-head p{color:var(--graphite);margin-top:14px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ---------- carousel ---------- */
.carousel{position:relative}
.rail{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:10px;scrollbar-width:none;scroll-behavior:smooth;
}
.rail::-webkit-scrollbar{display:none}
.slide{
  flex:0 0 min(420px,84vw);scroll-snap-align:start;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  transition:border-color .16s var(--ease),box-shadow .16s var(--ease),transform .16s var(--ease);
}
.slide:hover{border-color:var(--ink);box-shadow:var(--sh-2);transform:translateY(-2px)}
.slide img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#EDEBE5}
.slide-body{padding:18px 20px 22px}
.slide-body h3{font-size:18px;font-weight:700;line-height:1.4}
.slide-body p{margin-top:8px;font-size:14px;line-height:1.65;color:var(--gray)}
.carousel-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:22px}
.dots{display:flex;gap:8px}
.dots button{
  width:28px;height:4px;border-radius:999px;background:var(--line);
  transition:background .16s var(--ease);padding:0;
}
.dots button.active{background:var(--ink)}
.arrows{display:flex;gap:10px}
.arrow{
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:#fff;
  display:grid;place-items:center;color:var(--ink);
  transition:border-color .16s var(--ease),transform .16s var(--ease);
}
.arrow:hover{border-color:var(--ink);transform:translateY(-1px)}

/* ---------- ability cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 26px;box-shadow:var(--sh-1);
  transition:border-color .16s var(--ease),box-shadow .16s var(--ease),transform .16s var(--ease);
}
.card:hover{border-color:var(--ink);box-shadow:var(--sh-2);transform:translateY(-2px)}
.card-icon{
  width:44px;height:44px;border-radius:var(--r-md);border:1px solid var(--line);
  display:grid;place-items:center;background:var(--paper);color:var(--ink);
}
.card h3{font-size:19px;font-weight:700;margin-top:18px;line-height:1.4}
.card p{margin-top:10px;font-size:15px;color:var(--graphite);line-height:1.7}

/* ---------- split feature ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-media{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--sh-2);background:#EDEBE5;
}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.steps{margin-top:26px;display:flex;flex-direction:column;gap:0}
.step{display:grid;grid-template-columns:56px 1fr;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}
.step:first-child{padding-top:0}
.step:last-child{border-bottom:none;padding-bottom:0}
.step-num{
  font-size:24px;font-weight:700;letter-spacing:-.02em;color:var(--ink);
  line-height:1.2;
}
.step-num::after{content:"";display:block;width:24px;height:2px;background:var(--lime);margin-top:8px}
.step h3{font-size:17px;font-weight:700;line-height:1.4}
.step p{margin-top:6px;font-size:15px;color:var(--graphite);line-height:1.7}

/* ---------- requirements ---------- */
.spec-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start}
.spec-list{border-top:1px solid var(--line)}
.spec{
  display:grid;grid-template-columns:210px 1fr;gap:24px;align-items:center;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.spec-dt{display:flex;align-items:center;gap:10px;font-weight:700;font-size:15px}
.spec-dt svg{color:var(--ink);flex:none}
.spec-dd{color:var(--graphite);font-size:15px;line-height:1.7}
.spec-aside{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;box-shadow:var(--sh-1);
}
.spec-aside h3{font-size:18px;font-weight:700}
.spec-aside ul{margin-top:16px;display:flex;flex-direction:column;gap:12px}
.spec-aside li{display:flex;gap:10px;font-size:15px;color:var(--graphite);line-height:1.65}
.spec-aside li::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--lime);
  margin-top:9px;flex:none;
}
.spec-aside .btn{margin-top:22px}

/* ---------- reviews ---------- */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px;
  transition:border-color .16s var(--ease),transform .16s var(--ease);
}
.review:hover{border-color:var(--ink);transform:translateY(-2px)}
.review-top{display:flex;align-items:center;gap:12px}
.avatar{
  width:42px;height:42px;border-radius:50%;background:var(--ink);color:var(--lime);
  display:grid;place-items:center;font-weight:700;font-size:15px;flex:none;
}
.review-name{font-weight:700;font-size:15px}
.review-meta{display:flex;align-items:center;gap:8px;margin-top:2px}
.badge{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:999px;
  border:1px solid var(--line);background:var(--paper);font-size:12px;
  color:var(--graphite);letter-spacing:.02em;white-space:nowrap;
}
.stars{color:var(--lime-deep);letter-spacing:2px;font-size:14px;margin-top:14px}
.review p{margin-top:10px;font-size:15px;color:var(--graphite);line-height:1.72}

/* ---------- download band ---------- */
.download{
  background:var(--ink);color:#fff;position:relative;overflow:hidden;
  padding:88px 0;
}
.download::before{
  content:"";position:absolute;inset:0;opacity:.16;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;
}
.download .container{position:relative;z-index:1}
.download-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.download h2{
  font-size:clamp(24px,3vw,34px);line-height:1.2;font-weight:800;letter-spacing:-.015em;
}
.download p{color:#C4C8C4;margin-top:14px;max-width:54ch}
.download-cta{display:flex;flex-direction:column;gap:14px;max-width:420px}
.download .btn-primary{height:52px;font-size:16px}
.btn-meta{font-size:13px;color:#9BA09C}
.platforms{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}
.btn-plat{
  height:44px;padding:0 18px;border-radius:999px;border:1px solid rgba(255,255,255,.26);
  color:#fff;background:transparent;font-size:14px;font-weight:600;
  display:inline-flex;align-items:center;gap:8px;
  transition:background .16s var(--ease),color .16s var(--ease),transform .16s var(--ease);
}
.btn-plat:hover{background:#fff;color:var(--ink);transform:translateY(-1px)}
.download-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:34px}
.fact{border-top:1px solid rgba(255,255,255,.2);padding-top:14px}
.fact b{display:block;font-size:18px;font-weight:700}
.fact span{font-size:13px;color:#9BA09C}

/* ---------- news list (CMS) ---------- */
.news-list{border-top:1px solid var(--line)}
.news-row{
  display:grid;grid-template-columns:170px 1fr 44px;gap:24px;align-items:center;
  padding:24px 20px 24px 0;border-bottom:1px solid var(--line);
  transition:background .16s var(--ease),padding .16s var(--ease);
}
.news-row:hover{background:#fff;padding-left:20px}
.news-meta{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.news-meta time{font-size:13px;color:var(--gray);letter-spacing:.02em}
.news-row h3{font-size:17px;font-weight:700;line-height:1.5;transition:color .16s var(--ease);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-row:hover h3{
  text-decoration:underline;text-decoration-color:var(--lime);
  text-decoration-thickness:2px;text-underline-offset:4px;
}
.news-row .excerpt{
  margin-top:6px;font-size:14px;color:var(--gray);line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-arrow{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--ink);justify-self:end;
  transition:background .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease);
}
.news-row:hover .news-arrow{background:var(--ink);border-color:var(--ink);color:var(--lime)}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-lg);background:#fff;
  padding:56px 24px;text-align:center;display:flex;flex-direction:column;
  align-items:center;gap:14px;color:var(--graphite);
}
.empty-icon{
  width:48px;height:48px;border-radius:50%;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--gray);
}

/* ---------- FAQ ---------- */
.faq{border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;overflow:hidden}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:none}
.faq-q{
  position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:22px 24px;text-align:left;font-size:16px;font-weight:700;line-height:1.5;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;background:var(--lime);
  transform:scaleY(0);transform-origin:top;transition:transform .2s var(--ease);
}
.faq-item.open .faq-q::before{transform:scaleY(1)}
.faq-icon{
  width:26px;height:26px;border-radius:50%;border:1px solid var(--line);flex:none;
  display:grid;place-items:center;font-size:15px;font-weight:400;color:var(--ink);
  transition:transform .24s var(--ease),background .16s var(--ease),border-color .16s var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--lime);border-color:var(--lime)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a p{padding:0 24px 22px;font-size:15px;color:var(--graphite);line-height:1.75}

/* ---------- CTA band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--ink);color:#fff;padding:80px 0}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.18;
  background-image:url(/assets/images/backpic/back-3.webp);
  background-size:cover;background-position:center;
}
.cta-inner{
  position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;
  gap:40px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(24px,3vw,32px);font-weight:800;line-height:1.24;letter-spacing:-.015em;max-width:20ch}
.cta-band p{color:#C4C8C4;margin-top:12px;max-width:48ch}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta-band .btn-ghost{border-color:rgba(255,255,255,.3);color:#fff}
.cta-band .btn-ghost:hover{background:#fff;color:var(--ink);border-color:#fff}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#B9BEB9;padding:64px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff}
.footer-brand .brand-mark{background:var(--lime)}
.footer-brand .brand-text{font-weight:700;font-size:17px}
.site-footer h4{color:#fff;font-size:14px;letter-spacing:.04em;font-weight:700;margin-bottom:16px}
.site-footer ul{display:flex;flex-direction:column;gap:10px}
.site-footer a{font-size:14px;color:#B9BEB9;transition:color .16s var(--ease)}
.site-footer a:hover{color:var(--lime)}
.footer-about{margin-top:16px;font-size:14px;line-height:1.75;color:#8E938E;max-width:34ch}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8E938E;
}
.footer-bottom a{color:#8E938E}
.footer-bottom a:hover{color:var(--lime)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .3s var(--ease),transform .3s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .hero-grid{gap:44px}
  .split{gap:44px}
}
@media (max-width:1024px){
  .nav-links,.nav-right .search,.nav-right .link-btn{display:none}
  .nav-toggle{display:flex}
  .nav-right{gap:10px}
  .hero{padding:56px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .reviews{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:36px}
  .spec-wrap{grid-template-columns:1fr;gap:40px}
  .download-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
}
@media (max-width:768px){
  body{font-size:15.5px}
  .container{padding:0 20px}
  .stat{padding:0 18px}
  .stat b{font-size:18px}
  .grid-3{grid-template-columns:1fr}
  .reviews{grid-template-columns:1fr}
  .news-row{grid-template-columns:1fr;gap:12px;padding:22px 0}
  .news-row:hover{padding-left:0}
  .news-arrow{justify-self:start}
  .spec{grid-template-columns:1fr;gap:8px;align-items:start}
  .download{padding:64px 0}
  .cta-band{padding:64px 0}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .download-facts{grid-template-columns:1fr 1fr}
  .eyebrow{font-size:11px}
  .hero h1{font-size:clamp(28px,7.4vw,32px)}
  .stats{margin-top:32px}
  .stat{width:50%;padding:12px 0 12px 16px;border-left:1px solid var(--line)}
  .stat:first-child{padding-left:16px;border-left:1px solid var(--line)}
  .stat:nth-child(odd){padding-left:0;border-left:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .slide{flex:0 0 86vw}
}
@media (max-width:520px){
  .hero-cta .btn,.download .btn-primary{width:100%}
  .hero-cta{flex-direction:column;align-items:stretch}
  .platforms .btn-plat{flex:1 1 44%}
  .download-facts{grid-template-columns:1fr}
  .carousel-bar{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink:#101312;
  --ink-soft:#23282A;
  --lime:#C9F24D;
  --graphite:#3B4145;
  --gray:#8A8F8C;
  --paper:#F6F5F1;
  --paper-2:#F0EFE9;
  --white:#FFFFFF;
  --line:#E4E2DB;
  --radius-s:8px;
  --radius-m:12px;
  --radius-l:16px;
  --shadow-1:0 1px 2px rgba(16,19,18,.04);
  --shadow-2:0 12px 32px -12px rgba(16,19,18,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-en:"Space Grotesk",Inter,ui-monospace,system-ui,sans-serif;
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-soft);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.02em;line-height:1.2}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-m);
  border:1px solid transparent;background:transparent;
  font-size:14.5px;font-weight:700;text-decoration:none;white-space:nowrap;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
  cursor:pointer;
}
.btn-primary{background:var(--lime);color:var(--ink)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 22px -10px rgba(16,19,18,.45)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-1px)}
.btn-outline-light{border-color:rgba(255,255,255,.35);color:#fff}
.btn-outline-light:hover{background:#fff;color:var(--ink)}
.btn-block{width:100%}
.btn:active{transform:translateY(0)}

.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:12px;letter-spacing:.06em;color:var(--graphite);font-weight:600;
}
.badge-lime{background:rgba(201,242,77,.35);border-color:rgba(16,19,18,.08);color:var(--ink)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.scrolled{box-shadow:0 6px 18px -14px rgba(16,19,18,.5)}
.nav{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto}
.brand-mark{
  width:24px;height:24px;border-radius:7px;background:var(--ink);
  display:grid;place-items:center;flex:0 0 auto;
}
.brand-text{font-weight:700;font-size:15.5px;color:var(--ink);letter-spacing:-.01em}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:36px;padding:0 12px;
  font-size:14.5px;color:var(--graphite);text-decoration:none;border-radius:var(--radius-s);
  transition:color .16s var(--ease),background .16s var(--ease);
}
.nav-links a:hover{color:var(--ink);background:rgba(16,19,18,.05)}
.nav-links a.active{color:var(--ink);font-weight:700}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--lime);border-radius:2px;
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.search{
  display:flex;align-items:center;gap:8px;
  width:180px;height:38px;padding:0 12px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  color:var(--gray);
  transition:width .2s var(--ease),border-color .2s var(--ease);
}
.search:focus-within{width:240px;border-color:var(--ink);color:var(--ink)}
.search input{
  border:0;background:transparent;outline:none;width:100%;font-size:13.5px;color:var(--ink);
}
.search input::placeholder{color:var(--gray)}
.link-btn{
  font-size:14.5px;font-weight:600;color:var(--graphite);text-decoration:none;
  padding:8px 6px;border-radius:var(--radius-s);
}
.link-btn:hover{color:var(--ink);text-decoration:underline;text-decoration-color:var(--lime);text-decoration-thickness:2px;text-underline-offset:4px}
.nav .btn{height:38px;padding:0 16px;font-size:14px;border-radius:10px}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;
  border-radius:10px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;margin:0 auto;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(330px,88vw);
  background:#fff;border-left:1px solid var(--line);box-shadow:var(--shadow-2);
  padding:24px 22px;display:flex;flex-direction:column;gap:10px;
  transform:translateX(102%);transition:transform .28s var(--ease);z-index:90;
  overflow-y:auto;
}
.drawer.open{transform:none}
.drawer h3{font-size:13px;letter-spacing:.08em;color:var(--gray);text-transform:uppercase;margin:12px 0 2px}
.drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:46px;padding:0 4px;font-size:15px;font-weight:600;color:var(--ink);
  text-decoration:none;border-bottom:1px solid var(--line);
}
.drawer a.drawer-link:hover{color:#000;text-decoration:underline;text-decoration-color:var(--lime);text-decoration-thickness:2px}
.drawer .search{width:100%;height:44px}
.drawer-actions{display:flex;flex-direction:column;gap:10px;margin-top:8px}
body.no-scroll{overflow:hidden}

/* ---------- breadcrumb & article head ---------- */
.article-hero{padding:40px 0 8px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--gray)}
.breadcrumb a{color:var(--graphite);text-decoration:none}
.breadcrumb a:hover{color:var(--ink);text-decoration:underline;text-decoration-color:var(--lime);text-decoration-thickness:2px;text-underline-offset:3px}
.breadcrumb .sep{color:#c7c5be}
.breadcrumb .current{color:var(--graphite);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head{margin-top:22px;max-width:900px}
.head-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:16px}
.meta-time{font-size:13px;color:var(--gray);font-family:var(--font-en)}
.article-head h1{
  font-size:clamp(30px,4.4vw,50px);
  line-height:1.1;font-weight:800;letter-spacing:-.025em;
}

/* ---------- layout ---------- */
.article-main{padding:40px 0 96px}
.article-grid{
  display:grid;
  grid-template-columns:minmax(0,780px) 300px;
  gap:56px;justify-content:center;align-items:start;
}
.article-primary{min-width:0}
.article-figure{
  margin:0 0 36px;border:1px solid var(--line);border-radius:var(--radius-l);
  overflow:hidden;background:var(--paper-2);box-shadow:var(--shadow-1);
}
.article-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.article-figure figcaption{font-size:13px;color:var(--gray);padding:12px 16px;border-top:1px solid var(--line);background:#fff}

/* ---------- article body ---------- */
.article-body{font-size:16px;line-height:1.78;color:var(--ink-soft)}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  font-size:clamp(22px,2.5vw,29px);line-height:1.25;font-weight:800;
  margin:2.1em 0 .75em;padding-top:.2em;
}
.article-body h3{font-size:19px;font-weight:700;margin:1.7em 0 .55em}
.article-body h4{font-size:16.5px;font-weight:700;margin:1.5em 0 .5em}
.article-body p{margin:0 0 1.4em}
.article-body a{color:var(--ink);text-decoration:none;border-bottom:2px solid var(--lime);padding-bottom:1px}
.article-body a:hover{background:rgba(201,242,77,.3)}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.35em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:.45em 0}
.article-body li::marker{color:#9a9f9c}
.article-body blockquote{
  margin:1.7em 0;padding:14px 20px;border-left:3px solid var(--lime);
  background:rgba(201,242,77,.14);border-radius:0 var(--radius-m) var(--radius-m) 0;
  color:var(--graphite);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-m);margin:1.7em auto;border:1px solid var(--line)}
.article-body figure{margin:1.8em 0}
.article-body figcaption{font-size:13px;color:var(--gray);text-align:center;margin-top:8px}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.7em 0;font-size:14.5px;
  border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;
}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:11px 14px;text-align:left}
.article-body th{background:var(--paper-2);font-weight:700;color:var(--ink)}
.article-body tr:last-child td{border-bottom:0}
.article-body code{
  font-family:var(--font-en);font-size:.92em;background:var(--paper-2);
  padding:2px 6px;border-radius:6px;color:var(--ink);
}
.article-body pre{
  background:var(--ink);color:#e9ece9;padding:18px 20px;border-radius:var(--radius-m);
  overflow-x:auto;font-size:14px;margin:1.6em 0;
}
.article-body pre code{background:transparent;color:inherit;padding:0}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}
.article-body strong{color:var(--ink);font-weight:700}

/* ---------- empty state ---------- */
.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius-l);background:#fff;
  padding:56px 28px;text-align:center;
}
.empty-icon{
  width:52px;height:52px;margin:0 auto 18px;border-radius:var(--radius-m);
  border:1px solid var(--line);display:grid;place-items:center;color:var(--gray);background:var(--paper);
}
.empty-state h2{font-size:20px;margin-bottom:8px}
.empty-state p{color:var(--gray);font-size:14.5px;margin-bottom:20px}

/* ---------- article footer actions ---------- */
.article-foot{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;
  margin-top:44px;padding-top:28px;border-top:1px solid var(--line);
}

/* ---------- related ---------- */
.related{margin-top:64px}
.related h2{font-size:22px;font-weight:800;margin-bottom:20px}
.rec-list{border-top:1px solid var(--line)}
.rec-list li{border-bottom:1px solid var(--line)}
.rec-list a{
  display:flex;align-items:center;gap:14px;padding:18px 4px;
  text-decoration:none;transition:padding .16s var(--ease);
}
.rec-list a:hover{padding-left:10px}
.rec-cat{
  flex:0 0 auto;font-size:12px;letter-spacing:.06em;color:var(--graphite);
  border:1px solid var(--line);background:#fff;border-radius:999px;padding:2px 10px;
}
.rec-title{font-size:15.5px;font-weight:600;color:var(--ink);line-height:1.5}
.rec-list a:hover .rec-title{text-decoration:underline;text-decoration-color:var(--lime);text-decoration-thickness:2px;text-underline-offset:4px}
.rec-arrow{margin-left:auto;color:var(--gray);transition:transform .16s var(--ease),color .16s var(--ease)}
.rec-list a:hover .rec-arrow{transform:translateX(3px);color:var(--ink)}

/* ---------- sidebar ---------- */
.article-side{position:sticky;top:88px;display:flex;flex-direction:column;gap:20px}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);
  padding:22px;box-shadow:var(--shadow-1);
}
.side-card h3{font-size:15px;font-weight:800;margin-bottom:14px}
.spec-list li{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  padding:10px 0;border-bottom:1px solid var(--line);font-size:13.5px;
}
.spec-list li:last-of-type{border-bottom:0}
.spec-list span{color:var(--gray)}
.spec-list strong{color:var(--ink);font-weight:700;font-size:13.5px;text-align:right}
.side-card .btn{margin-top:16px}
.side-links li{border-bottom:1px solid var(--line)}
.side-links li:last-child{border-bottom:0}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:44px;font-size:14.5px;font-weight:600;color:var(--graphite);text-decoration:none;
}
.side-links a::after{content:"→";color:var(--gray);font-size:13px}
.side-links a:hover{color:var(--ink);text-decoration:underline;text-decoration-color:var(--lime);text-decoration-thickness:2px;text-underline-offset:4px}

/* ---------- CTA band ---------- */
.cta-band{background:var(--ink);color:#fff;padding:76px 0}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px}
.cta-band h2{color:#fff;font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.72);font-size:15px;max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 28px;border-top:1px solid rgba(255,255,255,.08)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-mark{background:var(--lime)}
.footer-brand .brand-text{color:#fff;font-weight:700;font-size:15.5px}
.footer-about{font-size:13.5px;line-height:1.8;max-width:34ch;color:rgba(255,255,255,.62)}
.site-footer h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:14px;letter-spacing:.02em}
.site-footer ul li{margin-bottom:10px}
.site-footer ul a{
  font-size:13.5px;color:rgba(255,255,255,.68);text-decoration:none;
  transition:color .16s var(--ease);
}
.site-footer ul a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--lime);text-decoration-thickness:2px;text-underline-offset:3px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  font-size:12.5px;color:rgba(255,255,255,.5);font-family:var(--font-en);
}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(8px);transition:opacity .3s var(--ease),transform .3s var(--ease)}
[data-reveal].in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .article-grid{gap:40px;grid-template-columns:minmax(0,1fr) 280px}
}
@media (max-width:1024px){
  .nav-links{display:none}
  .search{display:none}
  .link-btn{display:none}
  .nav-toggle{display:block}
  .article-grid{grid-template-columns:minmax(0,1fr)}
  .article-side{position:static;flex-direction:row;flex-wrap:wrap}
  .side-card{flex:1 1 280px}
  .article-primary{max-width:760px;margin:0 auto;width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .nav{height:56px}
  .brand-text{font-size:14.5px}
  .article-hero{padding:26px 0 4px}
  .article-head h1{font-size:clamp(26px,7vw,32px)}
  .breadcrumb .current{max-width:100%;white-space:normal}
  .article-main{padding:28px 0 64px}
  .article-grid{gap:32px}
  .article-body{font-size:15.5px}
  .article-foot .btn{flex:1 1 auto}
  .cta-band{padding:56px 0}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .search:focus-within{width:100%}
  .rec-list a{align-items:flex-start;flex-wrap:wrap;gap:8px}
  .rec-arrow{display:none}
  .article-side{flex-direction:column}
  .side-card{width:100%}
  .empty-state{padding:44px 20px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  [data-reveal]{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --ink:#101312;
  --acid:#C9F24D;
  --graphite:#3B4145;
  --gray:#8A8F8C;
  --paper:#F6F5F1;
  --line:#E4E2DB;
  --white:#FFFFFF;
  --r8:8px;
  --r12:12px;
  --r16:16px;
  --sh1:0 1px 2px rgba(16,19,18,.04);
  --sh2:0 12px 32px -12px rgba(16,19,18,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Space Grotesk","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r12)}
a{color:inherit;text-decoration:none;transition:color .16s var(--ease)}
a:hover{color:var(--ink)}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.2}
p{margin:0}
:focus-visible{outline:2px solid var(--acid);outline-offset:2px;border-radius:4px}

.container{max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section-lg{padding:128px 0}
.section-sm{padding:72px 0}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{font-size:clamp(24px,3vw,34px);margin-bottom:16px}
.section-head p{color:var(--graphite);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--graphite);font-weight:700;
  border-left:2px solid var(--acid);padding-left:10px;margin-bottom:18px;
}
.tag{
  display:inline-flex;align-items:center;
  font-size:12px;letter-spacing:.08em;font-weight:700;
  padding:5px 12px;border-radius:999px;border:1px solid var(--line);
  background:var(--white);color:var(--graphite);
}
.tag-acid{background:rgba(201,242,77,.32);border-color:rgba(201,242,77,.7);color:var(--ink)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  transition:box-shadow .16s var(--ease);
}
.site-header.scrolled{box-shadow:var(--sh1)}
.nav{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:24px;height:24px;border-radius:7px;background:var(--ink);
  display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;
}
.brand-text{font-weight:700;font-size:16px;letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:8px}
.nav-links a{
  position:relative;font-size:15px;color:var(--graphite);font-weight:500;
  padding:6px 0;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--acid);transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--ink);font-weight:700}
.nav-links a.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.search{
  display:flex;align-items:center;gap:8px;
  width:180px;height:40px;padding:0 14px;
  border:1px solid var(--line);border-radius:999px;background:var(--white);
  transition:width .2s var(--ease),border-color .16s var(--ease),box-shadow .16s var(--ease);
  color:var(--gray);
}
.search:focus-within{width:240px;border-color:var(--ink);box-shadow:var(--sh1)}
.search input{
  border:0;background:transparent;outline:none;width:100%;
  font-size:14px;color:var(--ink);
}
.search input::placeholder{color:var(--gray)}
.link-btn{font-size:14px;color:var(--graphite);white-space:nowrap;padding:8px 0}
.link-btn:hover{color:var(--ink);text-decoration:underline;text-decoration-color:var(--acid);text-underline-offset:5px;text-decoration-thickness:2px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r12);
  font-size:15px;font-weight:700;border:1px solid transparent;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
  text-align:center;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--acid);color:var(--ink);border-color:var(--acid)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--sh2);color:var(--ink)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{background:var(--ink);color:var(--white);border-color:var(--ink);transform:translateY(-1px)}
.btn-dark{background:var(--ink);color:var(--white);border-color:var(--ink)}
.btn-dark:hover{background:var(--graphite);color:var(--white);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.btn-lg{height:52px;padding:0 30px;font-size:16px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r8);
  border:1px solid var(--line);background:var(--white);
  align-items:center;justify-content:center;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;
  transition:transform .2s var(--ease),opacity .16s var(--ease);
}
.nav-toggle span::before{transform:translateY(-6px)}
.nav-toggle span::after{transform:translateY(4px)}

.drawer-backdrop{
  position:fixed;inset:0;background:rgba(16,19,18,.42);z-index:70;
  opacity:0;visibility:hidden;transition:opacity .2s var(--ease),visibility .2s var(--ease);
}
.drawer-backdrop.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:320px;max-width:88vw;
  background:var(--paper);border-left:1px solid var(--line);z-index:80;
  transform:translateX(100%);transition:transform .26s var(--ease);
  padding:22px 22px 32px;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-close{
  width:44px;height:44px;border-radius:var(--r8);border:1px solid var(--line);
  background:var(--white);display:flex;align-items:center;justify-content:center;font-size:18px;
}
.drawer nav{display:flex;flex-direction:column;gap:4px;margin-bottom:22px}
.drawer nav a{padding:13px 4px;font-size:16px;border-bottom:1px solid var(--line);color:var(--graphite);font-weight:500}
.drawer nav a.active{color:var(--ink);font-weight:700;border-bottom-color:var(--acid)}
.drawer .search{width:100%;height:44px;margin-bottom:16px}
.drawer .search:focus-within{width:100%}
.drawer-btns{display:flex;flex-direction:column;gap:12px}
.drawer-btns .btn{width:100%}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--ink);color:var(--white);overflow:hidden}
.hero-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  opacity:.30;filter:grayscale(.6);
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(16,19,18,.78) 0%,rgba(16,19,18,.94) 100%);
}
.hero-inner{position:relative;z-index:2;padding:96px 0 72px}
.hero .eyebrow{color:var(--acid);border-left-color:var(--acid)}
.hero h1{
  font-size:clamp(32px,4.6vw,54px);line-height:1.08;letter-spacing:-.02em;
  max-width:900px;margin-bottom:22px;color:var(--white);
}
.hero p.lead{
  max-width:680px;color:rgba(255,255,255,.78);font-size:17px;margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:48px}
.hero .btn-ghost{color:var(--white);border-color:rgba(255,255,255,.28)}
.hero .btn-ghost:hover{background:var(--white);color:var(--ink);border-color:var(--white)}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:rgba(255,255,255,.6);margin-bottom:22px}
.crumbs a:hover{color:var(--acid)}
.crumbs span.sep{opacity:.5}
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid rgba(255,255,255,.16);
}
.stats div{
  padding:20px 18px 0 0;border-right:1px solid rgba(255,255,255,.12);
}
.stats div:last-child{border-right:0}
.stats dt{font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.55);text-transform:uppercase;margin-bottom:6px}
.stats dd{margin:0;font-family:var(--font-num);font-size:22px;font-weight:700;color:var(--acid);letter-spacing:-.01em}

/* ---------- Steps ---------- */
.steps{display:flex;flex-direction:column;gap:72px;margin-top:8px}
.step{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.step.reverse .step-media{order:-1}
.step-body{max-width:520px}
.step-num{
  font-family:var(--font-num);font-size:64px;font-weight:700;line-height:1;
  color:var(--ink);display:block;margin-bottom:14px;letter-spacing:-.04em;
}
.step-num::after{content:"";display:block;width:56px;height:4px;background:var(--acid);margin-top:14px;border-radius:2px}
.step h3{font-size:22px;margin-bottom:12px}
.step p{color:var(--graphite);font-size:15.5px}
.step-media{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r16);
  padding:14px;box-shadow:var(--sh1);transition:border-color .16s var(--ease),box-shadow .18s var(--ease);
}
.step-media:hover{border-color:var(--ink);box-shadow:var(--sh2)}
.step-media img{aspect-ratio:16/9;object-fit:cover;width:100%}
.step-media figcaption{font-size:13px;color:var(--gray);margin-top:10px;line-height:1.6}
.step-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.step-list li{position:relative;padding-left:22px;font-size:15px;color:var(--graphite)}
.step-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;
  background:var(--acid);border-radius:2px;
}

/* ---------- Platform cards ---------- */
.plat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.plat-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r16);
  overflow:hidden;display:flex;flex-direction:column;
  transition:border-color .16s var(--ease),box-shadow .18s var(--ease),transform .16s var(--ease);
}
.plat-card:hover{border-color:var(--ink);box-shadow:var(--sh2);transform:translateY(-2px)}
.plat-card img{aspect-ratio:16/9;object-fit:cover;width:100%;border-radius:0;border-bottom:1px solid var(--line)}
.plat-body{padding:24px}
.plat-body h3{font-size:19px;margin-bottom:10px;display:flex;align-items:center;gap:10px}
.plat-body p{color:var(--graphite);font-size:15px}
.plat-meta{margin-top:18px;display:flex;flex-wrap:wrap;gap:8px}

/* ---------- Spec list ---------- */
.spec-wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:start}
.spec-list{border-top:1px solid var(--line);margin-top:8px}
.spec-row{
  display:grid;grid-template-columns:190px 1fr;gap:20px;
  padding:18px 0;border-bottom:1px solid var(--line);align-items:center;
}
.spec-row dt{
  display:flex;align-items:center;gap:10px;
  font-size:14px;color:var(--graphite);font-weight:700;
}
.spec-icon{
  width:32px;height:32px;border-radius:var(--r8);border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;background:var(--white);
}
.spec-row dd{margin:0;font-size:15px;color:var(--ink)}
.spec-row dd small{display:block;color:var(--gray);font-size:13px;margin-top:2px}
.spec-card{
  background:var(--ink);color:var(--white);border-radius:var(--r16);
  padding:32px;box-shadow:var(--sh2);
}
.spec-card h3{font-size:20px;margin-bottom:14px;color:var(--white)}
.spec-card p{color:rgba(255,255,255,.72);font-size:15px;margin-bottom:22px}
.spec-card ul{display:flex;flex-direction:column;gap:12px;margin-bottom:26px}
.spec-card li{display:flex;gap:10px;font-size:14.5px;color:rgba(255,255,255,.86)}
.spec-card li .dot{width:6px;height:6px;border-radius:50%;background:var(--acid);margin-top:11px;flex-shrink:0}

/* ---------- Troubleshoot ---------- */
.fix-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.fix-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r12);
  padding:24px;transition:border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.fix-card:hover{border-color:var(--ink);box-shadow:var(--sh1)}
.fix-card h3{font-size:16px;margin-bottom:10px}
.fix-card p{font-size:14.5px;color:var(--graphite)}

/* ---------- FAQ ---------- */
.faq{max-width:900px;margin:0 auto;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);position:relative}
.faq summary{
  list-style:none;cursor:pointer;padding:22px 52px 22px 20px;
  font-size:17px;font-weight:700;position:relative;transition:color .16s var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;
  background:var(--line);border-radius:2px;transition:background-color .16s var(--ease);
}
.faq summary::after{
  content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--gray);
  transition:transform .2s var(--ease),color .16s var(--ease);
}
.faq summary:hover{color:var(--ink)}
.faq details[open] summary::before{background:var(--acid)}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg);color:var(--ink)}
.faq .faq-body{padding:0 52px 24px 20px;color:var(--graphite);font-size:15px}

/* ---------- CTA ---------- */
.cta-dark{background:var(--ink);color:var(--white);border-radius:0}
.cta-dark .cta-inner{
  padding:88px 0;display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;
}
.cta-dark h2{font-size:clamp(24px,3vw,34px);color:var(--white);margin-bottom:16px}
.cta-dark p{color:rgba(255,255,255,.74);font-size:16px;max-width:560px}
.dl-panel{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:var(--r16);padding:28px}
.dl-panel .btn-primary{width:100%;height:52px;font-size:16px}
.dl-note{font-size:13px;color:rgba(255,255,255,.6);text-align:center;margin-top:12px}
.dl-sub{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:16px}
.dl-sub a{
  display:flex;align-items:center;justify-content:center;height:44px;
  border:1px solid rgba(255,255,255,.2);border-radius:10px;font-size:14px;font-weight:600;
  color:rgba(255,255,255,.86);transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.dl-sub a:hover{background:var(--white);color:var(--ink);border-color:var(--white)}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:var(--acid)}
.footer-brand .brand-text{color:var(--white);font-weight:700}
.footer-about{font-size:14px;line-height:1.75;max-width:320px}
.site-footer h4{font-size:14px;color:var(--white);margin-bottom:16px;letter-spacing:.02em}
.site-footer ul{display:flex;flex-direction:column;gap:10px}
.site-footer li a{font-size:14px;color:rgba(255,255,255,.7)}
.site-footer li a:hover{color:var(--acid)}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  padding-top:24px;font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
.reveal.visible{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1280px){
  .container{padding:0 28px}
}
@media (max-width:1024px){
  .nav-links,.nav-right .search,.nav-right .link-btn{display:none}
  .nav-toggle{display:inline-flex}
  .section{padding:78px 0}
  .section-lg{padding:96px 0}
  .hero-inner{padding:80px 0 60px}
  .step{grid-template-columns:1fr;gap:28px}
  .step.reverse .step-media{order:0}
  .step-body{max-width:100%}
  .spec-wrap{grid-template-columns:1fr;gap:36px}
  .cta-dark .cta-inner{grid-template-columns:1fr;gap:36px;padding:72px 0}
  .fix-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:64px 0}
  .section-lg{padding:72px 0}
  .section-sm{padding:56px 0}
  .hero h1{font-size:32px}
  .hero p.lead{font-size:15.5px}
  .hero-actions{gap:12px}
  .hero-actions .btn{width:100%}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stats div{border-right:0;border-bottom:1px solid rgba(255,255,255,.12);padding:16px 0 14px}
  .stats div:nth-child(odd){padding-right:14px}
  .plat-grid{grid-template-columns:1fr}
  .fix-grid{grid-template-columns:1fr}
  .step-num{font-size:48px}
  .spec-row{grid-template-columns:1fr;gap:6px;padding:16px 0}
  .faq summary{font-size:16px;padding:18px 44px 18px 16px}
  .faq .faq-body{padding:0 44px 20px 16px}
  .dl-sub{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:520px){
  .nav-right .btn-primary{display:none}
  .brand-text{font-size:15px}
  .step-media{padding:10px}
  .spec-card{padding:24px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --ink:#101312;
  --ink-soft:#3B4145;
  --gray:#8A8F8C;
  --paper:#F6F5F1;
  --line:#E4E2DB;
  --lime:#C9F24D;
  --white:#ffffff;
  --radius-s:8px;
  --radius-m:12px;
  --radius-l:16px;
  --shadow-1:0 1px 2px rgba(16,19,18,.04);
  --shadow-2:0 12px 32px -12px rgba(16,19,18,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Space Grotesk","PingFang SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px;}
::selection{background:var(--lime);color:var(--ink);}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 20px -14px rgba(16,19,18,.35);}
.nav{display:flex;align-items:center;gap:28px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:24px;height:24px;border-radius:6px;background:var(--ink);
  display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;
}
.brand-text{font-weight:700;font-size:16px;letter-spacing:-.01em;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:6px;}
.nav-links a{
  position:relative;padding:6px 0;font-size:15px;color:var(--ink-soft);
  transition:color .16s var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:100%;bottom:-2px;height:2px;
  background:var(--lime);transition:right .2s var(--ease);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{right:0;}
.nav-links a.active{color:var(--ink);font-weight:700;}
.nav-links a.active::after{right:0;}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto;}
.search{
  display:flex;align-items:center;gap:8px;
  width:180px;height:38px;padding:0 12px;
  background:var(--white);border:1px solid var(--line);border-radius:999px;
  color:var(--gray);transition:width .2s var(--ease),border-color .2s var(--ease);
}
.search:focus-within{width:240px;border-color:var(--ink);color:var(--ink);}
.search input{
  width:100%;border:0;background:transparent;outline:none;font-size:14px;
}
.search input::placeholder{color:var(--gray);}
.link-btn{font-size:14px;color:var(--ink-soft);padding:8px 6px;transition:color .16s var(--ease);}
.link-btn:hover{color:var(--ink);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:999px;cursor:pointer;
  font-size:15px;font-weight:600;line-height:1;padding:0 20px;height:40px;
  transition:transform .16s var(--ease),background .16s var(--ease),color .16s var(--ease),box-shadow .16s var(--ease),border-color .16s var(--ease);
}
.btn-primary{background:var(--lime);color:var(--ink);}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-dark{background:var(--ink);color:var(--white);}
.btn-dark:hover{transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink);}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-1px);}
.btn-lg{height:52px;padding:0 28px;font-size:16px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:var(--white);
  border-radius:10px;position:relative;cursor:pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:13px;width:18px;height:2px;background:var(--ink);content:"";transition:.2s var(--ease);
}
.nav-toggle span{top:21px;}
.nav-toggle span::before{top:-6px;left:0;}
.nav-toggle span::after{top:6px;left:0;}

/* drawer */
.drawer{
  position:fixed;inset:0 0 0 auto;width:min(320px,86vw);z-index:80;
  background:var(--paper);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .26s var(--ease);
  padding:24px 22px;display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
.drawer.open{transform:none;}
.drawer .drawer-close{
  align-self:flex-end;width:44px;height:44px;border:1px solid var(--line);background:var(--white);
  border-radius:10px;cursor:pointer;font-size:20px;line-height:1;
}
.drawer nav{display:flex;flex-direction:column;gap:4px;}
.drawer nav a{padding:12px 4px;border-bottom:1px solid var(--line);font-size:15px;}
.drawer nav a.active{font-weight:700;color:var(--ink);box-shadow:inset 3px 0 0 var(--lime);padding-left:12px;}
.drawer .drawer-actions{display:flex;flex-direction:column;gap:10px;margin-top:6px;}
.overlay{
  position:fixed;inset:0;background:rgba(16,19,18,.42);z-index:70;
  opacity:0;visibility:hidden;transition:.24s var(--ease);
}
.overlay.open{opacity:1;visibility:visible;}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background:var(--paper);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(90deg,rgba(16,19,18,.9) 0%,rgba(16,19,18,.72) 46%,rgba(16,19,18,.35) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center right;
}
.page-hero .container{position:relative;z-index:1;}
.hero-inner{padding:88px 0 76px;max-width:720px;color:var(--white);}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  border-left:2px solid var(--lime);padding:2px 0 2px 12px;
  font-size:12px;letter-spacing:.08em;font-family:var(--font-num);
  text-transform:uppercase;color:var(--lime);margin-bottom:20px;
}
.page-hero h1{
  font-size:clamp(32px,4.4vw,54px);line-height:1.08;letter-spacing:-.02em;font-weight:800;
}
.page-hero h1 em{font-style:normal;color:var(--lime);}
.hero-sub{margin-top:20px;font-size:17px;color:rgba(255,255,255,.82);max-width:600px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px;}
.hero-actions .btn-ghost{border-color:rgba(255,255,255,.36);color:var(--white);}
.hero-actions .btn-ghost:hover{border-color:var(--lime);color:var(--lime);}
.hero-facts{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border-top:1px solid rgba(255,255,255,.18);margin-top:52px;
}
.hero-facts div{padding:18px 20px 0 0;border-right:1px solid rgba(255,255,255,.14);}
.hero-facts div:last-child{border-right:0;}
.hero-facts dt{font-size:12px;letter-spacing:.06em;color:rgba(255,255,255,.6);}
.hero-facts dd{margin:6px 0 0;font-family:var(--font-num);font-size:22px;font-weight:700;color:var(--white);}

/* ---------- sections ---------- */
.section{padding:88px 0;}
.section.tight{padding:64px 0;}
.section.on-dark{background:var(--ink);color:var(--white);}
.section.on-white{background:var(--white);}
.section-head{max-width:680px;margin-bottom:44px;}
.section-head .kicker{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--font-num);
  font-size:12px;letter-spacing:.08em;color:var(--gray);text-transform:uppercase;margin-bottom:14px;
}
.section-head .kicker::before{content:"";width:18px;height:2px;background:var(--lime);}
.section-head h2{font-size:clamp(24px,3vw,34px);line-height:1.2;font-weight:800;letter-spacing:-.01em;}
.section-head p{margin-top:14px;color:var(--ink-soft);font-size:16px;}
.on-dark .section-head p{color:rgba(255,255,255,.74);}
.on-dark .section-head .kicker{color:rgba(255,255,255,.55);}

/* ---------- asymmetric grid ---------- */
.grid12{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.span-7{grid-column:span 7;}
.span-5{grid-column:span 5;}
.span-8{grid-column:span 8;}
.span-4{grid-column:span 4;}
.span-6{grid-column:span 6;}

.panel{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:28px;transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.panel:hover{border-color:var(--ink);box-shadow:var(--shadow-2);transform:translateY(-2px);}
.panel h3{font-size:clamp(18px,2vw,22px);line-height:1.3;font-weight:700;margin-bottom:10px;}
.panel p{color:var(--ink-soft);font-size:15px;}
.panel .badge{margin-bottom:16px;}
.shot{
  border-radius:var(--radius-m);overflow:hidden;border:1px solid var(--line);
  background:#ECEAE4;margin-bottom:20px;
}
.shot img{width:100%;aspect-ratio:16/9;object-fit:cover;}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-num);font-size:12px;letter-spacing:.06em;
  padding:4px 10px;border-radius:999px;background:rgba(201,242,77,.28);
  color:var(--ink);border:1px solid rgba(16,19,18,.08);
}
.badge.muted{background:var(--paper);color:var(--ink-soft);border-color:var(--line);}

.checklist{margin-top:16px;display:grid;gap:10px;}
.checklist li{display:flex;gap:10px;font-size:15px;color:var(--ink-soft);}
.checklist li::before{
  content:"";flex-shrink:0;width:16px;height:16px;margin-top:6px;border-radius:4px;
  background:var(--lime);box-shadow:inset 0 0 0 1px rgba(16,19,18,.12);
}

/* ---------- feature cards two column ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.feature{
  background:var(--white);border:1px solid var(--line);border-radius:14px;padding:24px;
  display:flex;gap:16px;transition:border-color .18s var(--ease),transform .18s var(--ease);
}
.feature:hover{border-color:var(--ink);transform:translateY(-2px);}
.feature .ico{
  flex-shrink:0;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--ink);background:var(--paper);
}
.feature h3{font-size:18px;font-weight:700;margin-bottom:6px;}
.feature p{font-size:14.5px;color:var(--ink-soft);}

/* ---------- metrics ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);
  border-radius:var(--radius-l);overflow:hidden;background:var(--white);
}
.metrics div{padding:26px 24px;border-right:1px solid var(--line);}
.metrics div:last-child{border-right:0;}
.metrics b{display:block;font-family:var(--font-num);font-size:28px;font-weight:700;letter-spacing:-.02em;}
.metrics span{display:block;margin-top:6px;font-size:13.5px;color:var(--gray);}

/* ---------- flow ---------- */
.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.flow-item{
  border-top:2px solid var(--ink);padding-top:18px;
}
.on-dark .flow-item{border-top-color:var(--lime);}
.flow-item .num{
  font-family:var(--font-num);font-size:34px;font-weight:700;line-height:1;color:var(--lime);
  -webkit-text-stroke:1px rgba(16,19,18,.12);
}
.flow-item h3{font-size:18px;font-weight:700;margin:14px 0 8px;}
.flow-item p{font-size:14.5px;color:var(--ink-soft);}
.on-dark .flow-item p{color:rgba(255,255,255,.72);}

/* ---------- quotes ---------- */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.quote{
  background:var(--white);border:1px solid var(--line);border-radius:14px;padding:24px;
  transition:border-color .18s var(--ease);
}
.quote:hover{border-color:var(--ink);}
.quote .stars{color:#7EA30E;letter-spacing:2px;font-size:14px;margin-bottom:12px;}
.quote p{font-size:14.5px;color:var(--ink-soft);}
.quote .who{display:flex;align-items:center;gap:10px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line);}
.quote .avatar{
  width:36px;height:36px;border-radius:50%;background:var(--ink);color:var(--lime);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;font-family:var(--font-num);
}
.quote .who strong{display:block;font-size:14px;}
.quote .who small{color:var(--gray);font-size:12.5px;}

/* ---------- faq ---------- */
.faq-wrap{display:grid;grid-template-columns:1fr;gap:12px;max-width:860px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-m);background:var(--white);
  padding:0;overflow:hidden;transition:border-color .18s var(--ease);
}
.faq-item[open]{border-color:var(--ink);box-shadow:var(--shadow-1);}
.faq-item summary{
  cursor:pointer;list-style:none;padding:18px 22px 18px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16px;font-weight:600;position:relative;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
  background:var(--line);transition:background .18s var(--ease);
}
.faq-item[open] summary::before{background:var(--lime);}
.faq-item summary .plus{
  flex-shrink:0;width:22px;height:22px;position:relative;transition:transform .2s var(--ease);
}
.faq-item summary .plus::before,
.faq-item summary .plus::after{
  content:"";position:absolute;background:var(--ink);border-radius:2px;
}
.faq-item summary .plus::before{left:0;top:10px;width:22px;height:2px;}
.faq-item summary .plus::after{top:0;left:10px;width:2px;height:22px;}
.faq-item[open] summary .plus{transform:rotate(45deg);}
.faq-body{padding:0 24px 22px 24px;color:var(--ink-soft);font-size:15px;}

/* ---------- cta ---------- */
.cta-band{
  background:var(--ink);color:var(--white);border-radius:var(--radius-l);
  padding:56px 48px;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;
}
.cta-band h2{font-size:clamp(24px,3vw,34px);line-height:1.2;font-weight:800;}
.cta-band p{margin-top:14px;color:rgba(255,255,255,.74);font-size:16px;}
.cta-band .actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;}
.cta-band .btn-ghost{border-color:rgba(255,255,255,.32);color:var(--white);}
.cta-band .btn-ghost:hover{border-color:var(--lime);color:var(--lime);}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.78);padding:64px 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:var(--white);margin-bottom:16px;}
.footer-brand .brand-mark{background:var(--lime);}
.footer-brand .brand-text{font-weight:700;}
.footer-about{font-size:14px;color:rgba(255,255,255,.6);max-width:320px;}
.site-footer h4{font-size:14px;color:var(--white);margin-bottom:14px;letter-spacing:.02em;}
.site-footer ul{display:grid;gap:9px;}
.site-footer ul a{font-size:14px;color:rgba(255,255,255,.66);transition:color .16s var(--ease);}
.site-footer ul a:hover{color:var(--lime);}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .3s var(--ease),transform .3s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .nav-links{gap:16px;}
  .search{width:150px;}
  .search:focus-within{width:190px;}
  .span-7,.span-5,.span-8,.span-4{grid-column:span 6;}
  .feature-grid{grid-template-columns:1fr;}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .metrics div:nth-child(2){border-right:0;}
  .metrics div:nth-child(1),.metrics div:nth-child(2){border-bottom:1px solid var(--line);}
  .quotes{grid-template-columns:1fr 1fr;}
  .cta-band{grid-template-columns:1fr;padding:44px 34px;}
  .cta-band .actions{justify-content:flex-start;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .nav{height:56px;gap:14px;}
  .nav-links,.search,.link-btn{display:none;}
  .nav-right{gap:10px;}
  .nav-right .btn-primary{height:38px;padding:0 16px;font-size:14px;}
  .nav-toggle{display:block;}
  .page-hero h1{font-size:32px;}
  .hero-inner{padding:56px 0 48px;}
  .hero-facts{grid-template-columns:1fr 1fr;margin-top:36px;}
  .hero-facts div:nth-child(2){border-right:0;}
  .hero-facts div:nth-child(1),.hero-facts div:nth-child(2){border-bottom:1px solid rgba(255,255,255,.16);padding-bottom:14px;}
  .section{padding:60px 0;}
  .grid12{gap:16px;}
  .span-7,.span-5,.span-8,.span-4,.span-6{grid-column:span 12;}
  .flow{grid-template-columns:1fr;}
  .quotes{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-about{max-width:none;}
}
@media (max-width:520px){
  .metrics{grid-template-columns:1fr;}
  .metrics div{border-right:0;border-bottom:1px solid var(--line);}
  .metrics div:last-child{border-bottom:0;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
  .cta-band{padding:34px 22px;}
  .cta-band .actions .btn{width:100%;}
}

/* roulang page: category3 */
/* ===================== 设计变量 ===================== */
:root{
  --ink:#101312;
  --ink-soft:#222825;
  --lime:#C9F24D;
  --lime-deep:#A9D42F;
  --graphite:#3B4145;
  --gray:#8A8F8C;
  --paper:#F6F5F1;
  --white:#ffffff;
  --line:#E4E2DB;
  --line-strong:#CFCDC4;
  --r8:8px;
  --r12:12px;
  --r16:16px;
  --sh1:0 1px 2px rgba(16,19,18,.04);
  --sh2:0 12px 32px -12px rgba(16,19,18,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Space Grotesk","Inter",system-ui,sans-serif;
  --maxw:1200px;
}
/* ===================== reset / base ===================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease)}
button,input{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
::selection{background:var(--lime);color:var(--ink)}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 32px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ===================== 通用组件 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;
  border-radius:var(--r8);
  font-weight:700;font-size:15px;line-height:1;
  border:1px solid transparent;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--lime);color:var(--ink);box-shadow:0 1px 2px rgba(16,19,18,.06)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 22px -10px rgba(16,19,18,.45);background:var(--lime-deep)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--ink);background:var(--white)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--ink-soft);transform:translateY(-1px);box-shadow:0 10px 22px -12px rgba(16,19,18,.6)}
.btn-light{background:#fff;color:var(--ink);border-color:var(--line-strong)}
.btn-light:hover{border-color:var(--ink);transform:translateY(-1px)}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn-block{width:100%}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  font-size:12px;letter-spacing:.06em;font-weight:700;
  border:1px solid var(--line);background:#fff;color:var(--graphite);
}
.badge-lime{background:rgba(201,242,77,.28);border-color:rgba(169,212,47,.55);color:#3d4a10}
.badge-ink{background:var(--ink);border-color:var(--ink);color:#fff}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  padding-left:12px;border-left:2px solid var(--lime);
  font-size:12px;letter-spacing:.14em;font-weight:700;color:var(--graphite);
  text-transform:uppercase;
}
.eyebrow.on-dark{color:#C9CFC9}

.section{padding:104px 0}
.section-sm{padding:72px 0}
.section-lg{padding:128px 0}
.section-head{max-width:720px;margin-bottom:48px}
.section-head h2{font-size:clamp(24px,3vw,34px);line-height:1.2;font-weight:800;letter-spacing:-.02em;margin-top:14px}
.section-head p{margin-top:14px;color:var(--graphite);font-size:16px}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ===================== 顶部导航 ===================== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 4px 18px -10px rgba(16,19,18,.25)}
.nav{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:24px;height:24px;border-radius:6px;background:var(--ink);
  display:inline-flex;align-items:center;justify-content:center;
}
.brand-text{font-weight:700;font-size:16px;letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:8px}
.nav-links a{
  position:relative;padding:6px 0;font-size:15px;font-weight:500;color:var(--graphite);
  transition:color .16s var(--ease);
}
.nav-links a:hover{color:var(--ink)}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease);
}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--ink);font-weight:700}
.nav-links a.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.search{
  display:flex;align-items:center;gap:8px;
  height:38px;width:180px;padding:0 12px;
  border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--gray);
  transition:width .22s var(--ease),border-color .16s var(--ease);
}
.search:focus-within{width:240px;border-color:var(--ink)}
.search input{border:none;outline:none;background:transparent;width:100%;font-size:14px}
.search input::placeholder{color:var(--gray)}
.link-btn{font-size:15px;font-weight:600;color:var(--graphite);padding:8px 4px}
.link-btn:hover{color:var(--ink);box-shadow:inset 0 -2px 0 var(--lime)}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border-radius:var(--r8);border:1px solid var(--line);background:#fff;
}
.nav-toggle span{position:relative;display:block;width:16px;height:2px;background:var(--ink);border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);border-radius:2px}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}

/* ===================== Hero ===================== */
.page-hero{
  position:relative;overflow:hidden;
  background:var(--ink);color:#fff;
  padding:96px 0 88px;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(90deg,rgba(16,19,18,.94) 0%,rgba(16,19,18,.78) 52%,rgba(16,19,18,.56) 100%),url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent 88%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:56px;align-items:center}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:#9aa19b;margin-bottom:22px}
.crumb a:hover{color:var(--lime)}
.crumb span{color:#6f7570}
.page-hero h1{
  font-size:clamp(30px,4.4vw,50px);
  line-height:1.1;letter-spacing:-.02em;font-weight:800;
  margin-top:18px;color:#fff;
}
.page-hero h1 em{font-style:normal;box-shadow:inset 0 -12px 0 rgba(201,242,77,.28)}
.hero-lead{margin-top:20px;color:#C3C9C3;font-size:17px;max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:0;margin-top:44px;border-top:1px solid rgba(255,255,255,.16);
}
.hero-stats div{padding:18px 20px 0 0;border-right:1px solid rgba(255,255,255,.14)}
.hero-stats div:last-child{border-right:none}
.hero-stats b{display:block;font-family:var(--font-num);font-size:26px;font-weight:700;color:var(--lime);letter-spacing:-.01em}
.hero-stats span{display:block;font-size:13px;color:#9aa19b;margin-top:4px}
.hero-card{
  border-radius:var(--r16);overflow:hidden;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.04);
  box-shadow:0 24px 60px -24px rgba(0,0,0,.7);
}
.hero-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:#1c211e}
.hero-card figcaption{
  padding:16px 20px;font-size:13px;color:#B6BCB6;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.hero-card figcaption strong{color:#fff;font-weight:600}

/* ===================== 支持通道卡 ===================== */
.support-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.support-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r12);
  padding:28px 26px;display:flex;flex-direction:column;gap:14px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.support-card:hover{border-color:var(--ink);box-shadow:var(--sh2);transform:translateY(-2px)}
.icon-box{
  width:42px;height:42px;border-radius:var(--r8);
  border:1px solid var(--line);background:var(--paper);
  display:flex;align-items:center;justify-content:center;color:var(--ink);
}
.support-card h3{font-size:19px;font-weight:700;line-height:1.35}
.support-card p{font-size:14px;color:var(--graphite);margin:0}
.support-card ul{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--gray)}
.support-card ul li{display:flex;gap:8px;align-items:flex-start}
.support-card ul li::before{content:"";flex:0 0 auto;width:6px;height:6px;margin-top:9px;border-radius:2px;background:var(--lime)}
.card-link{margin-top:auto;font-size:14px;font-weight:700;display:inline-flex;align-items:center;gap:6px;color:var(--ink)}
.card-link svg{transition:transform .18s var(--ease)}
.card-link:hover svg{transform:translateX(4px)}

/* ===================== 速查条 ===================== */
.quick-bar{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  background:#fff;border:1px solid var(--line);border-radius:var(--r12);overflow:hidden;
}
.quick-bar a{
  padding:22px 22px;border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:6px;
  transition:background-color .18s var(--ease);
}
.quick-bar a:last-child{border-right:none}
.quick-bar a:hover{background:var(--paper)}
.quick-bar b{font-size:15px;font-weight:700}
.quick-bar span{font-size:13px;color:var(--gray)}
.quick-bar .num{font-family:var(--font-num);font-size:12px;color:var(--lime-deep);letter-spacing:.1em;font-weight:700}

/* ===================== FAQ + 侧栏 ===================== */
.faq-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:40px;align-items:start}
.faq-group{margin-bottom:36px}
.faq-group-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.faq-group-head h3{font-size:18px;font-weight:700}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);background:transparent}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:flex-start;gap:16px;
  padding:20px 4px 20px 0;
  font-size:16px;font-weight:600;line-height:1.6;
  transition:color .16s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:#000}
.faq-item summary .bar{
  flex:0 0 auto;width:3px;height:22px;border-radius:2px;background:var(--line);
  margin-top:2px;transition:background-color .2s var(--ease);
}
.faq-item[open] summary .bar{background:var(--lime)}
.faq-item summary .q{flex:1}
.faq-item summary .plus{
  position:relative;flex:0 0 auto;width:22px;height:22px;margin-top:3px;
  transition:transform .22s var(--ease);
}
.faq-item summary .plus::before,.faq-item summary .plus::after{
  content:"";position:absolute;background:var(--graphite);border-radius:2px;
}
.faq-item summary .plus::before{left:0;top:10px;width:22px;height:2px}
.faq-item summary .plus::after{top:0;left:10px;width:2px;height:22px}
.faq-item[open] summary .plus{transform:rotate(45deg)}
.faq-item[open] summary .plus::before,.faq-item[open] summary .plus::after{background:var(--ink)}
.faq-body{padding:0 42px 24px 19px;color:var(--graphite);font-size:15px}
.faq-body p+p{margin-top:10px}
.faq-body ol{counter-reset:step;margin-top:12px;display:flex;flex-direction:column;gap:8px}
.faq-body ol li{position:relative;padding-left:28px;font-size:14.5px}
.faq-body ol li::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  position:absolute;left:0;top:1px;
  font-family:var(--font-num);font-size:12px;font-weight:700;color:var(--lime-deep);
}
.faq-note{
  margin-top:12px;padding:12px 14px;border-left:3px solid var(--lime);
  background:rgba(201,242,77,.13);border-radius:0 var(--r8) var(--r8) 0;
  font-size:13.5px;color:#3d4a10;
}
.faq-foot{
  margin-top:28px;padding:20px 22px;border:1px dashed var(--line-strong);border-radius:var(--r12);
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;justify-content:space-between;
  background:#fff;
}
.faq-foot p{font-size:14px;color:var(--graphite)}

/* 联系卡 */
.contact-card{
  position:sticky;top:88px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r12);
  padding:26px 24px;
}
.contact-card h3{font-size:19px;font-weight:700}
.contact-card > p{margin-top:10px;font-size:14px;color:var(--graphite)}
.contact-rows{margin-top:20px;border-top:1px solid var(--line)}
.contact-rows div{
  display:flex;justify-content:space-between;gap:14px;
  padding:13px 0;border-bottom:1px solid var(--line);font-size:14px;
}
.contact-rows dt{color:var(--gray);flex:0 0 auto}
.contact-rows dd{margin:0;font-weight:600;text-align:right}
.contact-actions{display:flex;flex-direction:column;gap:10px;margin-top:22px}
.contact-tip{margin-top:16px;font-size:13px;color:var(--gray);line-height:1.7}

/* ===================== 排查流程 ===================== */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;counter-reset:st}
.step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r12);
  padding:26px 22px 24px;transition:border-color .18s var(--ease),transform .18s var(--ease);
}
.step:hover{border-color:var(--ink);transform:translateY(-2px)}
.step .idx{
  font-family:var(--font-num);font-size:34px;font-weight:700;line-height:1;
  color:var(--line-strong);letter-spacing:-.03em;
}
.step h3{margin-top:14px;font-size:17px;font-weight:700}
.step p{margin-top:8px;font-size:14px;color:var(--graphite)}
.step::after{
  content:"";position:absolute;top:50%;right:-20px;width:16px;height:1px;background:var(--line-strong);
}
.step:last-child::after{display:none}

/* ===================== 证据区（图文） ===================== */
.proof{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center;
}
.proof-media{border-radius:var(--r16);overflow:hidden;border:1px solid var(--line);background:#fff}
.proof-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.proof-text h2{font-size:clamp(24px,3vw,32px);line-height:1.2;font-weight:800;letter-spacing:-.02em;margin-top:14px}
.proof-list{margin-top:26px;display:flex;flex-direction:column;gap:0;border-top:1px solid var(--line)}
.proof-list li{
  display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--line);
}
.proof-list b{flex:0 0 108px;font-size:14px;color:var(--gray);font-weight:600}
.proof-list span{font-size:14.5px;color:var(--graphite)}

/* ===================== CTA 深色块 ===================== */
.cta-band{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(520px 320px at 82% 18%,rgba(201,242,77,.16),transparent 70%);
}
.cta-band .container{position:relative;z-index:2}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
  padding:72px 0;
}
.cta-inner h2{font-size:clamp(24px,3vw,34px);line-height:1.22;font-weight:800;letter-spacing:-.02em;max-width:640px}
.cta-inner p{margin-top:14px;color:#B6BCB6;max-width:600px;font-size:15px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta-meta{margin-top:16px;font-size:13px;color:#8A8F8C}

/* ===================== 页脚 ===================== */
.site-footer{background:var(--ink);color:#C3C9C3;padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px}
.footer-brand .brand-mark{background:#fff}
.footer-about{margin-top:16px;font-size:14px;color:#9aa19b;max-width:320px}
.site-footer h4{font-size:13px;letter-spacing:.1em;color:#fff;font-weight:700;margin-bottom:16px}
.site-footer ul{display:flex;flex-direction:column;gap:10px}
.site-footer ul a{font-size:14px;color:#9aa19b}
.site-footer ul a:hover{color:var(--lime)}
.footer-bottom{
  margin-top:56px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#7C827D;
}

/* ===================== 动效 ===================== */
.reveal{opacity:0;transform:translateY(10px);transition:opacity .3s var(--ease),transform .3s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ===================== 响应式 ===================== */
@media (max-width:1280px){
  .container{padding:0 28px}
}
@media (max-width:1024px){
  .nav-links{
    position:fixed;top:64px;right:0;z-index:70;
    width:min(320px,86vw);height:calc(100vh - 64px);
    background:var(--paper);border-left:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:0;
    padding:18px 22px 40px;margin:0;
    transform:translateX(104%);transition:transform .28s var(--ease);
    overflow-y:auto;
  }
  body.drawer-open .nav-links{transform:translateX(0)}
  .nav-links a{padding:14px 2px;font-size:16px;border-bottom:1px solid var(--line)}
  .nav-links a::after{display:none}
  .nav-links a.active{color:var(--ink)}
  .nav-links a.active::before{
    content:"";display:inline-block;width:6px;height:6px;border-radius:2px;background:var(--lime);
    margin-right:10px;vertical-align:middle;
  }
  .nav-toggle{display:inline-flex}
  .search{width:150px}
  .search:focus-within{width:190px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .support-grid{grid-template-columns:1fr 1fr}
  .quick-bar{grid-template-columns:1fr 1fr}
  .quick-bar a:nth-child(2){border-right:none}
  .quick-bar a:nth-child(1),.quick-bar a:nth-child(2){border-bottom:1px solid var(--line)}
  .faq-layout{grid-template-columns:1fr}
  .contact-card{position:static}
  .steps{grid-template-columns:1fr 1fr}
  .step:nth-child(2)::after{display:none}
  .proof{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:72px 0}
  .section-lg{padding:88px 0}
  .section-sm{padding:56px 0}
  .nav{height:56px;gap:14px}
  .nav-links{top:56px;height:calc(100vh - 56px)}
  .search{display:none}
  .link-btn{display:none}
  .page-hero{padding:64px 0 60px}
  .page-hero h1{font-size:32px}
  .hero-lead{font-size:15.5px}
  .hero-stats{grid-template-columns:1fr;border-top:none}
  .hero-stats div{border-right:none;border-bottom:1px solid rgba(255,255,255,.14);padding:14px 0 14px}
  .hero-stats div:last-child{border-bottom:none}
  .support-grid{grid-template-columns:1fr}
  .quick-bar{grid-template-columns:1fr}
  .quick-bar a{border-right:none;border-bottom:1px solid var(--line)}
  .quick-bar a:last-child{border-bottom:none}
  .steps{grid-template-columns:1fr}
  .step::after{display:none}
  .faq-body{padding:0 0 22px 19px}
  .cta-inner{padding:56px 0;flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .page-hero h1{font-size:28px;line-height:1.18}
  .faq-item summary{font-size:15px;gap:12px}
  .proof-list li{flex-direction:column;gap:6px}
  .proof-list b{flex:none}
  .hero-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
}