/* roulang page: index */
:root{
  --primary:#FF6A1F;
  --primary-hover:#E4550E;
  --primary-soft:#FFEDE2;
  --accent:#17E0C4;
  --gold:#FFD34E;
  --ink:#14121A;
  --ink-surface:#1F1B29;
  --bg:#F7F5F2;
  --bg-alt:#F1EDE8;
  --surface:#FFFFFF;
  --text:#1D1B23;
  --muted:#5A5764;
  --on-dark:#F3F1EE;
  --on-dark-muted:#A9A3B5;
  --line:#E6E2DC;
  --line-dark:rgba(255,255,255,.10);
  --danger:#D93A3A;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-btn:10px;
  --radius-img:14px;
  --radius-pill:999px;
  --shadow-xs:0 1px 2px rgba(29,27,35,.06);
  --shadow-md:0 8px 24px rgba(29,27,35,.08);
  --glow:0 10px 30px rgba(255,106,31,.28);
  --font-cn:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter","SF Pro Display",-apple-system,"Segoe UI",Roboto,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:1.8;
  color:var(--text);
  background:var(--bg);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;object-fit:cover}
a{color:inherit;text-decoration:none;transition:color .18s ease-out}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0 0 .6em;line-height:1.25;font-weight:700;letter-spacing:-.01em}
h1{font-size:28px}
h2{font-size:22px}
h3{font-size:18px}
h4{font-size:16px}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
::selection{background:var(--primary);color:#fff}
:focus-visible{outline:3px solid rgba(255,106,31,.4);outline-offset:2px;border-radius:6px}
.grid-container{max-width:1200px;margin:0 auto;padding:0 20px;width:100%}
.section{padding:56px 0}
.section-head{max-width:720px;margin-bottom:32px}
.section-head h2{margin-bottom:12px}
.section-head p{color:var(--muted);margin:0}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--primary);text-transform:uppercase;margin-bottom:10px;
}
.on-dark .eyebrow{color:var(--accent)}
.on-dark h2,.on-dark h3{color:var(--on-dark)}
.on-dark p{color:var(--on-dark-muted)}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 12px;
  border-radius:var(--radius-pill);background:var(--primary-soft);color:var(--primary);
  font-size:13px;font-weight:600;line-height:1;
}
.badge-accent{background:rgba(23,224,196,.14);color:#0EA88F}
.badge-gold{background:rgba(255,211,78,.24);color:#8A6400}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:16px;font-weight:600;line-height:1;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background .18s ease-out,border-color .18s ease-out,color .18s ease-out;
  border:1.5px solid transparent;white-space:nowrap;
}
.btn i{font-size:15px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-xs)}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:var(--glow)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{border-color:var(--primary);color:var(--primary);background:transparent}
.btn-outline:hover{background:rgba(255,106,31,.08);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.24);color:var(--on-dark);background:transparent}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}
.text-link{color:var(--primary);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.text-link:hover{color:var(--primary-hover)}
.text-link:hover i{transform:translateX(3px)}
.text-link i{transition:transform .18s ease-out}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--ink);
  border-bottom:1px solid transparent;transition:background .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.site-header.is-scrolled{background:var(--ink);border-bottom-color:var(--line-dark);box-shadow:var(--shadow-md)}
.header-inner{display:flex;align-items:center;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{display:grid;grid-template-columns:repeat(2,1fr);gap:3px;width:26px;height:26px}
.brand-mark span{border-radius:3px;display:block}
.brand-mark span:nth-child(1){background:var(--primary)}
.brand-mark span:nth-child(2){background:var(--accent)}
.brand-mark span:nth-child(3){background:var(--gold)}
.brand-mark span:nth-child(4){background:var(--primary);opacity:.55}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text b{color:var(--on-dark);font-size:17px;font-weight:700;letter-spacing:.02em}
.brand-text i{font-style:normal;font-size:11px;color:var(--on-dark-muted);letter-spacing:.18em;margin-top:2px}
.nav-main{display:none;align-items:center;gap:4px;margin-left:auto}
.nav-main a{
  position:relative;display:inline-flex;align-items:center;height:72px;padding:0 13px;
  color:var(--on-dark-muted);font-size:15px;font-weight:500;
}
.nav-main a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:18px;height:3px;border-radius:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;
}
.nav-main a:hover{color:var(--on-dark)}
.nav-main a:hover::after{transform:scaleX(1)}
.nav-main a.is-active{color:var(--on-dark);font-weight:600}
.nav-main a.is-active::after{transform:scaleX(1)}
.header-tools{display:flex;align-items:center;gap:10px;margin-left:auto}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--radius-btn);color:var(--on-dark-muted);font-size:17px;transition:color .18s,background .18s;
}
.icon-btn:hover{color:var(--accent);background:rgba(255,255,255,.06)}
.header-cta{display:none;height:40px;padding:0 18px;font-size:15px}
.burger{display:inline-flex}

/* ===== Drawer ===== */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,18,26,.6);opacity:0;visibility:hidden;
  transition:opacity .25s ease-out,visibility .25s;z-index:80;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;background:var(--ink-surface);
  z-index:90;transform:translateX(100%);transition:transform .28s ease-out;
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:24px}
.drawer-nav a{
  padding:14px 12px;border-radius:var(--radius-md);color:var(--on-dark-muted);font-size:16px;
  border-left:3px solid transparent;transition:background .18s,color .18s,border-color .18s;
}
.drawer-nav a:hover{background:rgba(255,255,255,.05);color:var(--on-dark)}
.drawer-nav a.is-active{color:var(--on-dark);font-weight:600;border-left-color:var(--primary);background:rgba(255,106,31,.10)}
.drawer-foot{margin-top:auto;color:var(--on-dark-muted);font-size:13px;line-height:1.7}

/* ===== Search layer ===== */
.search-layer{
  position:fixed;inset:0;background:rgba(20,18,26,.86);z-index:95;display:flex;align-items:flex-start;justify-content:center;
  padding:100px 20px;opacity:0;visibility:hidden;transition:opacity .22s ease-out,visibility .22s;
}
.search-layer.is-open{opacity:1;visibility:visible}
.search-box{width:100%;max-width:620px}
.search-box form{display:flex;gap:10px}
.search-box input{
  flex:1;height:52px;padding:0 18px;border-radius:var(--radius-btn);
  border:1.5px solid var(--line-dark);background:var(--ink-surface);color:var(--on-dark);font-size:16px;
}
.search-box input::placeholder{color:var(--on-dark-muted)}
.search-box input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(255,106,31,.3)}
.search-close{width:52px;height:52px;border-radius:var(--radius-btn);border:1.5px solid var(--line-dark);color:var(--on-dark);font-size:18px}
.search-tip{color:var(--on-dark-muted);font-size:14px;margin-top:14px}

/* ===== Hero ===== */
.hero{
  position:relative;background-color:var(--ink);color:var(--on-dark);overflow:hidden;
  padding:56px 0 64px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  opacity:.22;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.04) 0 1px,transparent 1px 4px);
  pointer-events:none;
}
.hero .grid-container{position:relative;z-index:2}
.hero-grid{gap:36px}
.hero-copy h1{color:var(--on-dark);margin-bottom:16px}
.hero-sub{color:var(--on-dark-muted);font-size:17px;max-width:560px;margin-bottom:26px}
.hero-actions{display:flex;flex-direction:column;gap:12px;margin-bottom:28px}
.hero-actions .btn{width:100%}
.hero-points{display:flex;flex-direction:column;gap:10px}
.hero-points li{display:flex;gap:10px;color:var(--on-dark-muted);font-size:15px;line-height:1.6}
.hero-points i{color:var(--accent);margin-top:4px;font-size:14px}
.hero-visual img{
  width:100%;border-radius:var(--radius-img);box-shadow:var(--glow);
  border:1px solid var(--line-dark);aspect-ratio:16/9;
}

/* ===== Download bar ===== */
.dl-bar{background:var(--ink-surface);padding:40px 0 48px;border-top:1px solid var(--line-dark)}
.dl-head{margin-bottom:24px}
.dl-head h2{color:var(--on-dark);font-size:20px;margin-bottom:8px}
.dl-head p{color:var(--on-dark-muted);margin:0;font-size:15px}
.dl-list{display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:6px;margin:0 -20px;padding-left:20px;padding-right:20px}
.dl-list::-webkit-scrollbar{height:0}
.dl-item{
  flex:0 0 78%;scroll-snap-align:start;border-radius:var(--radius-md);padding:16px 18px;
  border:1.5px solid var(--line-dark);background:rgba(255,255,255,.03);color:var(--on-dark);
  display:flex;align-items:center;gap:14px;transition:transform .18s ease-out,border-color .18s,box-shadow .18s,background .18s;
}
.dl-item:hover{transform:translateY(-2px);border-color:var(--primary);box-shadow:var(--shadow-md)}
.dl-item i{font-size:22px;color:var(--accent);width:26px;text-align:center}
.dl-item b{display:block;font-size:16px;font-weight:600;color:var(--on-dark)}
.dl-item small{display:block;font-size:13px;color:var(--on-dark-muted);font-family:var(--font-num)}
.dl-item.is-primary{background:var(--primary);border-color:var(--primary);box-shadow:var(--glow)}
.dl-item.is-primary i,.dl-item.is-primary b,.dl-item.is-primary small{color:#fff}
.dl-item.is-primary:hover{background:var(--primary-hover);border-color:var(--primary-hover)}

/* ===== Value ===== */
.value-section{background:var(--bg)}
.value-block{display:grid;gap:24px;align-items:center;margin-bottom:40px}
.value-block:last-child{margin-bottom:0}
.value-media img{width:100%;border-radius:var(--radius-img);aspect-ratio:16/9;border:1px solid var(--line)}
.value-num{
  display:inline-block;font-family:var(--font-num);font-size:14px;font-weight:700;color:var(--primary);
  letter-spacing:.14em;margin-bottom:10px;
}
.value-body h3{margin-bottom:10px}
.value-body p{color:var(--muted)}
.check-list{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text)}
.check-list i{
  width:22px;height:22px;flex:0 0 22px;border-radius:50%;border:1.5px solid var(--primary);color:var(--primary);
  display:inline-flex;align-items:center;justify-content:center;font-size:10px;margin-top:3px;
}

/* ===== Shots slider ===== */
.shots-section{background:var(--ink);color:var(--on-dark)}
.slider{position:relative}
.slider-stage{position:relative;border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line-dark);background:var(--ink-surface)}
.slide{display:none;margin:0}
.slide.is-active{display:block;animation:fadeIn .32s ease-out}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.slide img{width:100%;aspect-ratio:16/9}
.slide-caption{color:var(--on-dark);font-size:15px;margin:16px 0 18px;font-weight:500}
.slider-nav{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px}
.arrow-btn{
  width:44px;height:44px;border-radius:var(--radius-btn);border:1.5px solid var(--line-dark);
  color:var(--on-dark);display:inline-flex;align-items:center;justify-content:center;font-size:15px;
  transition:border-color .18s,color .18s,transform .18s;
}
.arrow-btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.dots{display:flex;gap:8px;align-items:center}
.dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.24);transition:background .18s,transform .18s}
.dot.is-active{background:var(--primary);transform:scale(1.25)}
.thumbs{display:flex;gap:10px;overflow-x:auto;padding-bottom:4px}
.thumbs::-webkit-scrollbar{height:0}
.thumb{
  flex:0 0 96px;border-radius:var(--radius-md);overflow:hidden;border:2px solid transparent;opacity:.6;
  transition:opacity .18s,border-color .18s,transform .18s;padding:0;background:none;
}
.thumb img{aspect-ratio:16/9;width:100%}
.thumb.is-active{opacity:1;border-color:var(--primary);transform:translateY(-2px)}

/* ===== Requirements tabs ===== */
.req-section{background:var(--bg)}
.tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px}
.tab{
  height:44px;padding:0 20px;border-radius:var(--radius-btn);border:1.5px solid var(--line);
  background:var(--surface);color:var(--muted);font-weight:600;font-size:15px;
  transition:border-color .18s,color .18s,background .18s,transform .18s;
}
.tab:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.tab.is-active{background:var(--primary);border-color:var(--primary);color:#fff}
.tab-panel{display:none}
.tab-panel.is-active{display:grid;gap:20px}
.spec-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;
  box-shadow:var(--shadow-xs);transition:box-shadow .18s,transform .18s,border-color .18s;
}
.spec-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:rgba(255,106,31,.4)}
.spec-card h4{display:flex;align-items:center;gap:8px;margin-bottom:14px;color:var(--text)}
.spec-card h4 span{font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--primary);border:1px solid var(--primary);border-radius:var(--radius-pill);padding:2px 10px;line-height:1.4}
.spec-card.is-recommend h4 span{color:#0EA88F;border-color:var(--accent)}
.spec-list{display:flex;flex-direction:column;gap:0}
.spec-list div{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px dashed var(--line)}
.spec-list div:last-child{border-bottom:0}
.spec-list dt{color:var(--muted);font-size:14px;margin:0}
.spec-list dd{margin:0;font-weight:600;font-size:14px;text-align:right;font-family:var(--font-num)}

/* ===== Reviews ===== */
.review-section{background:var(--bg-alt)}
.review-grid{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:8px;margin:0 -20px;padding-left:20px;padding-right:20px}
.review-grid::-webkit-scrollbar{height:0}
.review-card{
  flex:0 0 82%;scroll-snap-align:start;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-md);padding:20px;box-shadow:var(--shadow-xs);
  transition:transform .18s ease-out,box-shadow .18s,border-color .18s;
}
.review-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:rgba(255,106,31,.4)}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 40px;display:flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary);font-weight:700;font-size:15px;
}
.review-name{font-weight:600;font-size:15px;line-height:1.3}
.review-meta{font-size:13px;color:var(--muted);line-height:1.4}
.stars{display:flex;gap:3px;color:var(--gold);font-size:13px;margin-bottom:10px}
.review-text{font-size:15px;color:var(--text);line-height:1.75;margin:0}

/* ===== News ===== */
.news-section{background:var(--surface)}
.section-head.row-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;max-width:none}
.news-card{
  display:flex;flex-direction:column;gap:10px;height:100%;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-xs);
  transition:transform .18s ease-out,box-shadow .18s,border-color .18s;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:rgba(255,106,31,.4)}
.news-title{font-size:17px;margin:0;line-height:1.5}
.news-sum{
  color:var(--muted);font-size:14px;margin:0;line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-time{font-size:13px;color:var(--muted);font-family:var(--font-num);margin-top:auto}
.news-grid{margin-bottom:-24px}
.news-grid > .cell{margin-bottom:24px}
.news-empty{
  text-align:center;padding:36px 20px;border:1px dashed var(--line);border-radius:var(--radius-lg);background:var(--bg);
}
.news-empty img{width:160px;margin:0 auto 16px;border-radius:var(--radius-md);aspect-ratio:16/9}
.news-empty p{color:var(--muted);margin-bottom:18px}

/* ===== FAQ ===== */
.faq-section{background:var(--surface);padding-top:0}
.faq-wrap{max-width:860px;margin:0 auto;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:16px 4px;text-align:left;font-size:16px;font-weight:600;color:var(--text);
  transition:color .18s;
}
.faq-q:hover{color:var(--primary)}
.faq-q span{flex:1}
.faq-icon{
  position:relative;width:20px;height:20px;flex:0 0 20px;border-radius:50%;background:var(--primary-soft);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--primary);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .22s ease-out,opacity .22s;
}
.faq-icon::before{width:10px;height:2px}
.faq-icon::after{width:2px;height:10px}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-item.is-open .faq-q{color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease-out}
.faq-a-inner{padding:0 4px 20px;color:var(--muted);font-size:15px;line-height:1.85}
.faq-a-inner p{margin:0}

/* ===== Bottom CTA ===== */
.cta-band{background:var(--ink);color:var(--on-dark);text-align:center;position:relative;overflow:hidden}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(90deg,rgba(255,255,255,.04) 0 1px,transparent 1px 6px);
  pointer-events:none;
}
.cta-band .grid-container{position:relative;z-index:2}
.cta-band h2{color:var(--on-dark);font-size:24px;margin-bottom:12px}
.cta-band p{color:var(--on-dark-muted);max-width:560px;margin:0 auto 28px}
.cta-actions{display:flex;flex-direction:column;gap:12px;max-width:420px;margin:0 auto}

/* ===== Footer ===== */
.site-footer{background:var(--ink);color:var(--on-dark-muted);padding:56px 0 0;border-top:1px solid var(--line-dark)}
.footer-grid{display:grid;gap:32px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:14px;line-height:1.8;max-width:300px}
.qr-box{
  margin-top:16px;width:104px;height:104px;border:1px dashed var(--line-dark);border-radius:var(--radius-md);
  display:flex;align-items:center;justify-content:center;color:var(--on-dark-muted);font-size:12px;text-align:center;padding:10px;line-height:1.5;
}
.site-footer h4{color:var(--on-dark);font-size:15px;margin-bottom:16px;letter-spacing:.04em}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:var(--on-dark-muted)}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:40px;border-top:1px solid var(--line-dark);padding:20px 0 28px;
  display:flex;flex-direction:column;gap:10px;font-size:13px;line-height:1.7;
}
.footer-bottom a:hover{color:var(--accent)}

@media (min-width:640px){
  h1{font-size:32px}
  .section{padding:72px 0}
  .grid-container{padding:0 28px}
  .hero{padding:72px 0 80px}
  .hero-actions{flex-direction:row;flex-wrap:wrap}
  .hero-actions .btn{width:auto}
  .dl-item{flex:0 0 46%}
  .dl-list{margin:0;padding-left:0;padding-right:0}
  .tab-panel.is-active{grid-template-columns:1fr 1fr}
  .review-grid{margin:0;padding-left:0;padding-right:0}
  .review-card{flex:0 0 47%}
  .cta-actions{flex-direction:row;max-width:none;justify-content:center}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .footer-bottom{flex-direction:row;align-items:center;justify-content:space-between}
}
@media (min-width:1024px){
  h1{font-size:42px}
  h2{font-size:30px}
  h3{font-size:22px}
  .section{padding:96px 0}
  .grid-container{padding:0 32px}
  .header-inner{height:72px}
  .nav-main{display:flex}
  .header-tools{margin-left:8px}
  .header-cta{display:inline-flex}
  .burger{display:none}
  .hero{padding:96px 0 104px}
  .hero-grid{gap:48px}
  .hero-visual img{aspect-ratio:4/3}
  .dl-list{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
  .dl-item{flex:1}
  .value-block{grid-template-columns:1fr 1fr;gap:56px;margin-bottom:72px}
  .value-block.reverse .value-media{order:2}
  .value-block.reverse .value-body{order:1}
  .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;overflow:visible}
  .review-card{flex:none}
  .faq-section{padding-top:0}
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
}
@media (min-width:1440px){
  .grid-container{max-width:1200px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root{
  --primary:#FF6A1F;
  --primary-hover:#E4550E;
  --primary-soft:#FFEDE2;
  --accent:#17E0C4;
  --accent-soft:#DFFBF5;
  --gold:#FFD34E;
  --ink:#14121A;
  --ink-surface:#1F1B29;
  --bg:#F7F5F2;
  --bg-alt:#F1EDE8;
  --card:#FFFFFF;
  --text:#1D1B23;
  --muted:#5A5764;
  --on-dark:#F3F1EE;
  --on-dark-muted:#A9A3B5;
  --line:#E6E2DC;
  --line-dark:rgba(255,255,255,.10);
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --r-img:14px;
  --r-pill:999px;
  --sh-xs:0 1px 2px rgba(29,27,35,.06);
  --sh-md:0 8px 24px rgba(29,27,35,.08);
  --glow:0 10px 30px rgba(255,106,31,.28);
  --gap:16px;
  --sec-y:56px;
  --maxw:1200px;
  --readw:780px;
}
@media (min-width:1024px){
  :root{ --gap:24px; --sec-y:88px; }
}
@media (min-width:1440px){
  :root{ --gap:32px; --sec-y:96px; }
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;background:transparent}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:3px solid rgba(255,106,31,.4);outline-offset:2px}
::selection{background:var(--primary-soft);color:var(--primary-hover)}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding-left:20px;padding-right:20px}
@media (min-width:640px){.container{padding-left:28px;padding-right:28px}}
@media (min-width:1024px){.container{padding-left:32px;padding-right:32px}}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,245,242,.94);
  backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-stuck{box-shadow:var(--sh-md)}
.header-inner{display:flex;align-items:center;gap:14px;height:64px}
@media (min-width:1024px){.header-inner{height:72px;gap:26px}}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{display:grid;grid-template-columns:repeat(2,1fr);grid-template-rows:repeat(2,1fr);gap:3px;width:26px;height:26px}
.brand-mark span{border-radius:4px;background:var(--primary)}
.brand-mark span:nth-child(2){background:var(--accent)}
.brand-mark span:nth-child(3){background:var(--gold)}
.brand-mark span:nth-child(4){background:var(--ink);border-radius:50%}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:16px;font-weight:700;letter-spacing:.5px;color:var(--text)}
.brand-text i{font-style:normal;font-size:11px;letter-spacing:2.5px;color:var(--muted)}

.nav-main{display:none}
@media (min-width:1024px){
  .nav-main{display:flex;align-items:center;gap:24px;margin-left:auto}
  .nav-main a{position:relative;font-size:15px;color:var(--muted);padding:6px 0;transition:color .18s ease-out;white-space:nowrap}
  .nav-main a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--primary);border-radius:2px;transition:width .18s ease-out}
  .nav-main a:hover{color:var(--text)}
  .nav-main a:hover::after{width:100%}
  .nav-main a.is-active{color:var(--text);font-weight:600}
  .nav-main a.is-active::after{width:100%;height:3px}
}

.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
@media (min-width:1024px){.header-actions{margin-left:14px}}
.header-actions .btn-download{display:none}
@media (min-width:1024px){.header-actions .btn-download{display:inline-flex}}

.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-sm);background:#fff;color:var(--muted);
  transition:color .18s,border-color .18s,transform .18s,box-shadow .18s;
}
.icon-btn:hover{color:var(--primary);border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--sh-xs)}
.icon-btn:active{transform:translateY(1px)}
@media (min-width:1024px){.hamburger{display:none}}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;border:1.5px solid transparent;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background .18s,color .18s,border-color .18s;
  white-space:nowrap;
}
.btn i{font-size:14px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--sh-xs)}
.btn-primary:hover{background:var(--primary-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--glow)}
.btn-outline{background:#fff;color:var(--text);border-color:var(--line)}
.btn-outline:hover{color:var(--primary);border-color:var(--primary);background:var(--primary-soft);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--on-dark);border-color:rgba(255,255,255,.22)}
.btn-ghost:hover{color:var(--accent);border-color:var(--accent);transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn:active{transform:translateY(1px)}

/* ============ Search panel ============ */
.search-panel{
  max-height:0;overflow:hidden;background:var(--ink);transition:max-height .28s ease-out;
}
.search-panel.is-open{max-height:110px}
.search-form{display:flex;gap:10px;padding:16px 0}
.search-form input{
  flex:1;min-width:0;height:44px;border-radius:var(--r-sm);
  border:1.5px solid var(--line-dark);background:rgba(255,255,255,.06);color:var(--on-dark);
  padding:0 16px;font-size:15px;
}
.search-form input::placeholder{color:var(--on-dark-muted)}
.search-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(255,106,31,.35)}

/* ============ Drawer ============ */
.drawer-mask{
  position:fixed;inset:0;z-index:110;background:rgba(20,18,26,.55);
  opacity:0;pointer-events:none;transition:opacity .25s ease-out;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:120;
  width:84vw;max-width:360px;background:var(--ink);color:var(--on-dark);
  transform:translateX(100%);transition:transform .25s ease-out;
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-title{font-size:13px;letter-spacing:2px;color:var(--on-dark-muted)}
.drawer-close{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--r-sm);border:1px solid var(--line-dark);color:var(--on-dark);font-size:20px}
.drawer-close:hover{border-color:var(--accent);color:var(--accent)}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{padding:14px 4px;border-bottom:1px solid var(--line-dark);font-size:16px;color:var(--on-dark);transition:color .18s,padding-left .18s}
.drawer-nav a:hover{color:var(--primary);padding-left:8px}
.drawer-cta{margin-top:20px;width:100%}
.drawer-note{margin-top:auto;padding-top:24px;font-size:12px;color:var(--on-dark-muted)}

/* ============ Breadcrumb ============ */
.breadcrumb-wrap{background:#fff;border-bottom:1px solid var(--line)}
.breadcrumb{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);
  padding:16px 0;overflow-x:auto;white-space:nowrap;scrollbar-width:none;
}
.breadcrumb::-webkit-scrollbar{display:none}
.breadcrumb a{color:var(--muted);transition:color .18s}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:#C9C4BC}
.breadcrumb .current{color:var(--text);font-weight:600}

/* ============ Article head ============ */
.article-head{background:#fff;padding:28px 0 32px}
@media (min-width:1024px){.article-head{padding:44px 0 56px;border-bottom:1px solid var(--line)}}
.article-head-inner{max-width:860px}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--primary-soft);color:var(--primary-hover);font-size:13px;font-weight:600;
}
.article-title{
  font-size:28px;line-height:1.28;font-weight:800;letter-spacing:-.2px;
  margin:16px 0 16px;
}
@media (min-width:1024px){.article-title{font-size:42px;line-height:1.25}}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
.article-meta .meta-dot{width:4px;height:4px;border-radius:50%;background:#D8D3CB}

/* ============ Article body ============ */
.article-body{padding:32px 0 56px}
@media (min-width:1024px){.article-body{padding:56px 0 72px}}
.article-layout{display:grid;gap:36px}
@media (min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,var(--readw)) 240px;gap:56px;justify-content:center;align-items:start}
}
.article-main{min-width:0;max-width:var(--readw)}

.prose{font-size:17px;line-height:1.85;color:var(--text);word-wrap:break-word}
.prose > * + *{margin-top:1em}
.prose h2{
  font-size:22px;line-height:1.4;font-weight:700;margin-top:2.1em;
  padding-left:14px;border-left:4px solid var(--primary);
}
@media (min-width:1024px){.prose h2{font-size:30px}}
.prose h3{font-size:18px;line-height:1.45;font-weight:700;margin-top:1.7em}
@media (min-width:1024px){.prose h3{font-size:22px}}
.prose p{margin-top:1em}
.prose strong{font-weight:700}
.prose a{color:var(--primary-hover);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--primary)}
.prose ul{list-style:none;padding-left:0;margin-top:1em}
.prose ul li{position:relative;padding-left:22px}
.prose ul li + li{margin-top:.5em}
.prose ul li::before{
  content:"";position:absolute;left:3px;top:.72em;width:7px;height:7px;border-radius:2px;
  background:var(--accent);transform:rotate(45deg);
}
.prose ol{list-style:decimal;padding-left:22px;margin-top:1em}
.prose ol li + li{margin-top:.5em}
.prose ol li::marker{color:var(--primary);font-weight:700}
.prose blockquote{
  margin:1.6em 0;padding:16px 20px;background:var(--primary-soft);
  border-left:4px solid var(--primary);border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--muted);font-size:16px;
}
.prose blockquote p{margin:0}
.prose img{border-radius:var(--r-img);margin:1.6em auto;width:100%;box-shadow:var(--sh-xs)}
.prose figure{margin:1.6em 0}
.prose figcaption{text-align:center;font-size:13px;color:var(--muted);margin-top:8px}
.prose table{
  width:100%;border-collapse:separate;border-spacing:0;font-size:15px;margin:1.6em 0;
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
}
.prose th,.prose td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line)}
.prose thead th{background:var(--bg-alt);font-weight:600;color:var(--text)}
.prose tbody tr:last-child td{border-bottom:0}
.prose tbody tr:nth-child(even){background:#FBFAF8}
.prose code{background:var(--bg-alt);padding:2px 6px;border-radius:6px;font-size:.92em}
.prose pre{background:var(--ink);color:var(--on-dark);padding:16px;border-radius:var(--r-md);overflow:auto;font-size:14px}
.prose pre code{background:none;padding:0;color:inherit}
.prose hr{border:0;border-top:1px solid var(--line);margin:2em 0}

/* ============ Empty state ============ */
.empty-state{
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-lg);
  padding:48px 24px;text-align:center;
}
.empty-state .empty-icon{
  width:60px;height:60px;margin:0 auto 16px;border-radius:var(--r-md);
  background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:24px;
}
.empty-state h2{font-size:20px;font-weight:700;margin-bottom:8px}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:20px}

/* ============ TOC ============ */
.article-aside{display:none}
@media (min-width:1024px){
  .article-aside{display:block;position:sticky;top:96px}
}
.toc{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:18px 16px;box-shadow:var(--sh-xs);
}
.toc h4{font-size:13px;letter-spacing:1.5px;color:var(--muted);font-weight:600;margin-bottom:12px}
.toc a{
  display:block;font-size:14px;line-height:1.5;color:var(--muted);
  padding:7px 0 7px 12px;border-left:2px solid var(--line);
  transition:color .18s,border-color .18s,padding-left .18s;
}
.toc a:hover{color:var(--primary);border-left-color:var(--primary);padding-left:16px}
.toc a.is-current{color:var(--primary-hover);font-weight:600;border-left-color:var(--primary)}
.toc a.lv3{padding-left:26px;font-size:13px}
.toc-empty{font-size:13px;color:var(--muted);line-height:1.7}

/* ============ Article footer ============ */
.article-foot{
  margin-top:40px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
}
.tag-list{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--line);font-size:13px;color:var(--muted);
  transition:transform .18s,color .18s,border-color .18s,box-shadow .18s;
}
.tag:hover{color:var(--primary);border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--sh-xs)}
.back-link{font-size:14px;font-weight:600;color:var(--primary-hover);display:inline-flex;align-items:center;gap:6px}
.back-link:hover{color:var(--primary)}

/* ============ Related ============ */
.related-section{padding:0 0 var(--sec-y);background:var(--bg)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:24px}
.section-head h2{font-size:22px;font-weight:700}
@media (min-width:1024px){.section-head h2{font-size:30px}}
.section-head p{font-size:14px;color:var(--muted);margin-top:6px}
.related-grid{display:grid;gap:20px}
@media (min-width:640px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.related-grid{grid-template-columns:repeat(3,1fr);gap:24px}}

.card{
  display:flex;flex-direction:column;overflow:hidden;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-xs);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:rgba(255,106,31,.4)}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--bg-alt)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease-out}
.card:hover .card-media img{transform:scale(1.05)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-body h3{font-size:17px;line-height:1.45;font-weight:700}
.card-body p{font-size:14px;line-height:1.75;color:var(--muted)}
.card-meta{margin-top:auto;font-size:12px;color:var(--muted);display:flex;align-items:center;gap:8px;padding-top:6px}
.card-meta .mini-badge{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--primary-soft);color:var(--primary-hover);font-size:12px;font-weight:600;
}

/* ============ CTA band ============ */
.cta-band{position:relative;overflow:hidden;background:var(--ink);color:var(--on-dark);padding:56px 0}
@media (min-width:1024px){.cta-band{padding:96px 0}}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(620px 300px at 78% -10%,rgba(255,106,31,.24),transparent 68%),
             radial-gradient(420px 260px at 8% 110%,rgba(23,224,196,.16),transparent 70%);
}
.cta-inner{position:relative;max-width:720px;margin:0 auto;text-align:center}
.cta-inner h2{font-size:23px;line-height:1.35;font-weight:700}
@media (min-width:1024px){.cta-inner h2{font-size:30px}}
.cta-inner p{color:var(--on-dark-muted);margin-top:12px;font-size:15px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:24px}

/* ============ Footer ============ */
.site-footer{background:var(--ink);color:var(--on-dark-muted);padding:56px 0 0;font-size:14px}
.site-footer .grid-container{max-width:var(--maxw);padding-left:20px;padding-right:20px}
@media (min-width:640px){.site-footer .grid-container{padding-left:28px;padding-right:28px}}
@media (min-width:1024px){.site-footer .grid-container{padding-left:32px;padding-right:32px}}
.footer-grid{display:grid;gap:32px}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.site-footer h4{color:var(--on-dark);font-size:15px;font-weight:600;margin-bottom:14px}
.footer-brand p{line-height:1.8;margin:14px 0 18px;max-width:330px}
.footer-brand .brand-text i{color:var(--on-dark-muted)}
.footer-brand .brand-text b{color:var(--on-dark)}
.qr-box{
  display:inline-flex;align-items:center;justify-content:center;text-align:center;
  width:122px;height:122px;padding:14px;font-size:12px;color:var(--on-dark-muted);
  border:1px dashed var(--line-dark);border-radius:var(--r-md);
}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:var(--on-dark-muted);transition:color .18s,transform .18s;width:fit-content}
.footer-links a:hover{color:var(--accent);transform:translateX(2px)}
.footer-bottom{
  margin-top:40px;border-top:1px solid var(--line-dark);padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;font-size:13px;
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --primary:#FF6A1F;
  --primary-hover:#E4550E;
  --primary-soft:#FFEDE2;
  --accent:#17E0C4;
  --gold:#FFD34E;
  --ink:#14121A;
  --ink-soft:#1F1B29;
  --bg:#F7F5F2;
  --bg-alt:#F1EDE8;
  --surface:#FFFFFF;
  --text:#1D1B23;
  --muted:#5A5764;
  --on-dark:#F3F1EE;
  --on-dark-muted:#A9A3B5;
  --line:#E6E2DC;
  --line-dark:rgba(255,255,255,.10);
  --danger:#D93A3A;
  --r-lg:16px;
  --r-sm:12px;
  --r-btn:10px;
  --r-img:14px;
  --r-pill:999px;
  --sh-xs:0 1px 2px rgba(29,27,35,.06);
  --sh-md:0 8px 24px rgba(29,27,35,.08);
  --sh-glow:0 10px 30px rgba(255,106,31,.28);
  --ease:.18s ease-out;
}
/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC","Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0 0 16px;line-height:1.25;font-weight:700;letter-spacing:.2px}
h1{font-size:28px}
h2{font-size:22px}
h3{font-size:18px}
h4{font-size:16px}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding:0;list-style:none}
figure{margin:0}
::selection{background:var(--primary);color:#fff}
:focus-visible{outline:3px solid rgba(255,106,31,.4);outline-offset:2px;border-radius:6px}
section{scroll-margin-top:96px}
.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}
/* ============ 容器 ============ */
.grid-container,.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.grid-container,.container{padding:0 28px}}
@media (min-width:1024px){.grid-container,.container{padding:0 32px}}
.section{padding:56px 0}
@media (min-width:640px){.section{padding:72px 0}}
@media (min-width:1024px){.section{padding:96px 0}}
.section-dark{background:var(--ink);color:var(--on-dark)}
.section-alt{background:var(--bg-alt)}
.section-white{background:var(--surface)}
/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-weight:600;font-size:15px;line-height:1;cursor:pointer;
  border:1.5px solid transparent;background:transparent;
  transition:transform var(--ease),background var(--ease),border-color var(--ease),color var(--ease),box-shadow var(--ease);
  white-space:nowrap;
}
@media (max-width:639px){.btn{height:48px;width:100%}}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--sh-xs)}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:var(--sh-glow)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary-soft);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.24);color:var(--on-dark)}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:var(--accent);transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn-row{display:flex;flex-wrap:wrap;gap:14px}
@media (max-width:639px){.btn-row{flex-direction:column;gap:12px}}
/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 12px;
  border-radius:var(--r-pill);background:var(--primary-soft);color:var(--primary);
  font-size:13px;font-weight:600;line-height:1;
}
.badge-accent{background:rgba(23,224,196,.14);color:#0E9C89}
.badge-new{background:rgba(255,211,78,.22);color:#8A6500}
.tag-list{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--surface);font-size:13px;color:var(--muted);
}
/* ============ 头部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled{
  background:var(--ink);
  border-bottom-color:var(--line-dark);
  box-shadow:var(--sh-md);
}
.header-inner{
  max-width:1200px;margin:0 auto;padding:0 20px;
  height:64px;display:flex;align-items:center;gap:18px;
}
@media (min-width:768px){.header-inner{padding:0 28px}}
@media (min-width:1024px){.header-inner{height:72px;padding:0 32px;gap:26px}}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  display:grid;grid-template-columns:repeat(2,7px);grid-template-rows:repeat(2,7px);
  gap:3px;padding:6px;border-radius:10px;background:rgba(255,106,31,.16);
  border:1px solid rgba(255,106,31,.34);
}
.brand-mark span{display:block;border-radius:2px;background:var(--primary)}
.brand-mark span:nth-child(2){background:var(--accent)}
.brand-mark span:nth-child(3){background:var(--gold)}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-text b{font-size:17px;font-weight:800;color:var(--on-dark)}
.brand-text i{font-style:normal;font-size:11px;letter-spacing:2px;color:var(--on-dark-muted)}
.nav-main{display:none;align-items:center;gap:24px;margin-left:auto}
@media (min-width:1024px){.nav-main{display:flex}}
.nav-main a{
  position:relative;font-size:15px;color:var(--on-dark-muted);padding:6px 0;
  transition:color var(--ease);
}
.nav-main a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.nav-main a:hover{color:var(--on-dark)}
.nav-main a:hover::after{transform:scaleX(1)}
.nav-main a.is-active{color:var(--on-dark);font-weight:600}
.nav-main a.is-active::after{transform:scaleX(1);height:3px}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
@media (min-width:1024px){.header-actions{margin-left:0}}
.header-actions .btn-primary{display:none}
@media (min-width:768px){.header-actions .btn-primary{display:inline-flex}}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-btn);border:1.5px solid rgba(255,255,255,.20);background:transparent;
  color:var(--on-dark);cursor:pointer;transition:background var(--ease),border-color var(--ease),transform var(--ease);
}
.icon-btn:hover{background:rgba(255,255,255,.08);border-color:var(--accent);transform:translateY(-2px)}
.hamburger{
  width:44px;height:44px;display:inline-flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;
  border-radius:var(--r-btn);border:1.5px solid rgba(255,255,255,.20);background:transparent;cursor:pointer;
  transition:background var(--ease),border-color var(--ease);
}
.hamburger span{display:block;width:20px;height:2px;border-radius:2px;background:var(--on-dark);transition:transform var(--ease)}
.hamburger:hover{background:rgba(255,255,255,.08);border-color:var(--accent)}
@media (min-width:1024px){.hamburger{display:none}}
/* 搜索层 */
.search-layer{
  position:absolute;top:100%;left:0;right:0;background:var(--ink);
  border-bottom:1px solid var(--line-dark);box-shadow:var(--sh-md);
  padding:18px 20px;
}
.search-layer[hidden]{display:none}
.search-box{
  max-width:640px;margin:0 auto;display:flex;gap:10px;align-items:center;
  background:var(--ink-soft);border:1px solid var(--line-dark);border-radius:var(--r-btn);
  padding:0 14px;height:48px;
}
.search-box i{color:var(--on-dark-muted)}
.search-box input{
  flex:1;background:transparent;border:0;color:var(--on-dark);height:100%;outline:none;font-size:15px;
}
.search-box input::placeholder{color:var(--on-dark-muted)}
.search-hint{max-width:640px;margin:10px auto 0;font-size:13px;color:var(--on-dark-muted)}
/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,18,26,.6);z-index:70;
  opacity:0;transition:opacity var(--ease);
}
.drawer-mask.is-open{opacity:1}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:80;
  background:var(--ink);border-left:1px solid var(--line-dark);
  padding:22px 22px 32px;overflow-y:auto;
  transform:translateX(100%);transition:transform .24s ease-out;
  display:flex;flex-direction:column;gap:20px;
}
.drawer.is-open{transform:translateX(0)}
.drawer-close{
  align-self:flex-end;width:44px;height:44px;border-radius:var(--r-btn);
  border:1.5px solid var(--line-dark);background:transparent;color:var(--on-dark);
  font-size:20px;cursor:pointer;
}
.drawer-close:hover{border-color:var(--accent)}
.drawer-nav{display:flex;flex-direction:column;gap:2px}
.drawer-nav a{
  padding:14px 12px;border-radius:var(--r-sm);color:var(--on-dark-muted);font-size:16px;
  border:1px solid transparent;transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.drawer-nav a:hover{background:var(--ink-soft);color:var(--on-dark);border-color:var(--line-dark)}
.drawer-nav a.is-active{background:rgba(255,106,31,.14);color:var(--on-dark);border-color:rgba(255,106,31,.36);font-weight:600}
.drawer-note{font-size:12px;color:var(--on-dark-muted);border-top:1px solid var(--line-dark);padding-top:14px;margin:0}
/* ============ Hero ============ */
.hero{
  position:relative;background:var(--ink);color:var(--on-dark);
  padding:118px 0 64px;overflow:hidden;
}
@media (min-width:1024px){.hero{padding:152px 0 96px}}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(20,18,26,.94) 0%,rgba(20,18,26,.78) 46%,rgba(20,18,26,.92) 100%),
             url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity:.9;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.04) 0 1px,transparent 1px 4px);
}
.hero > .grid-container{position:relative;z-index:2}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--on-dark-muted);margin-bottom:22px;flex-wrap:wrap}
.crumbs a{color:var(--on-dark-muted);transition:color var(--ease)}
.crumbs a:hover{color:var(--accent)}
.crumbs span[aria-current]{color:var(--on-dark);font-weight:600}
.hero-grid{display:grid;gap:34px}
@media (min-width:1024px){.hero-grid{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:48px;align-items:center}}
.hero h1{font-size:28px;margin:16px 0 14px;color:#fff}
@media (min-width:1024px){.hero h1{font-size:42px}}
.hero-lead{font-size:16px;color:var(--on-dark-muted);max-width:560px;margin-bottom:26px}
.hero-figure{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line-dark);box-shadow:var(--sh-glow);aspect-ratio:16/9;
}
.hero-figure img{width:100%;height:100%;object-fit:cover}
.hero-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:12px 16px;font-size:13px;
  color:var(--on-dark);background:linear-gradient(180deg,transparent,rgba(20,18,26,.86));
}
.hero-stats{display:flex;flex-wrap:wrap;gap:26px;margin-top:28px}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats b{font-size:22px;color:var(--primary);line-height:1.2}
.hero-stats span{font-size:13px;color:var(--on-dark-muted)}
/* ============ 下载带 ============ */
.dl-band{background:var(--ink);border-top:1px solid var(--line-dark);padding:28px 0 34px}
.dl-band-head{display:flex;flex-wrap:wrap;gap:10px;align-items:baseline;margin-bottom:18px}
.dl-band-head h2{font-size:18px;color:var(--on-dark);margin:0}
.dl-band-head p{font-size:13px;color:var(--on-dark-muted);margin:0}
.dl-grid{display:grid;gap:16px;grid-template-columns:repeat(2,minmax(0,1fr))}
@media (min-width:1024px){.dl-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.dl-card{
  display:flex;align-items:center;gap:12px;padding:16px;
  border-radius:var(--r-sm);border:1px solid var(--line-dark);background:var(--ink-soft);
  transition:transform var(--ease),border-color var(--ease),background var(--ease);
}
.dl-card:hover{transform:translateY(-2px);border-color:var(--primary)}
.dl-card.is-primary{background:var(--primary);border-color:var(--primary);box-shadow:var(--sh-glow)}
.dl-card.is-primary:hover{background:var(--primary-hover)}
.dl-card i{font-size:20px;color:var(--accent);flex-shrink:0}
.dl-card.is-primary i{color:#fff}
.dl-card-text{display:flex;flex-direction:column;min-width:0}
.dl-card-text b{font-size:15px;color:var(--on-dark);font-weight:600}
.dl-card.is-primary .dl-card-text b{color:#fff}
.dl-card-text span{font-size:12px;color:var(--on-dark-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dl-card.is-primary .dl-card-text span{color:rgba(255,255,255,.86)}
/* ============ 主体两栏 ============ */
.layout{display:grid;gap:32px}
@media (min-width:1024px){.layout{grid-template-columns:238px minmax(0,1fr);gap:52px;align-items:start}}
.anchor-nav{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--sh-xs);
}
@media (min-width:1024px){.anchor-nav{position:sticky;top:96px}}
.anchor-nav h3{font-size:14px;letter-spacing:1px;color:var(--muted);margin-bottom:12px;font-weight:600}
.anchor-nav a{
  display:block;padding:9px 12px;border-radius:var(--r-sm);font-size:14px;color:var(--muted);
  border-left:2px solid transparent;transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.anchor-nav a:hover{background:var(--bg);color:var(--text);border-left-color:var(--primary)}
.anchor-nav a.is-current{background:var(--primary-soft);color:var(--primary);font-weight:600;border-left-color:var(--primary)}
.anchor-nav .anchor-note{margin-top:14px;font-size:12px;color:var(--muted);border-top:1px dashed var(--line);padding-top:12px}
/* 内容块 */
.block{margin-bottom:48px}
.block:last-child{margin-bottom:0}
.block-head{margin-bottom:20px}
.block-head h2{font-size:22px;position:relative;padding-left:16px}
@media (min-width:1024px){.block-head h2{font-size:30px}}
.block-head h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:3px;background:var(--primary);
}
.block-head p{color:var(--muted);margin:10px 0 0}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--sh-xs);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
@media (min-width:768px){.card{padding:24px}}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:rgba(255,106,31,.4)}
.card h3{margin-bottom:8px}
.card p:last-child{margin-bottom:0}
.cards-2{display:grid;gap:18px}
@media (min-width:768px){.cards-2{grid-template-columns:repeat(2,minmax(0,1fr))}}
.cards-3{display:grid;gap:18px}
@media (min-width:768px){.cards-3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.cards-3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card-num{
  display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;
  background:var(--primary-soft);color:var(--primary);font-weight:700;font-size:15px;margin-bottom:12px;
}
.feature-list li{
  position:relative;padding-left:24px;margin-bottom:10px;color:var(--muted);font-size:15px;
}
.feature-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:9px;height:9px;border-radius:3px;
  background:transparent;border:2px solid var(--accent);
}
.feature-list li b{color:var(--text)}
.split{display:grid;gap:24px;align-items:center}
@media (min-width:900px){.split{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}}
.split.reverse .split-media{order:2}
@media (max-width:899px){.split.reverse .split-media{order:0}}
.split-media{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-md);aspect-ratio:16/9;background:var(--bg-alt)}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.split-media:hover img{transform:scale(1.03)}
/* 步骤 */
.steps{position:relative;padding-left:26px}
.steps::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:var(--line)}
.step{position:relative;padding-bottom:22px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:-26px;top:6px;width:14px;height:14px;border-radius:50%;
  background:var(--surface);border:3px solid var(--primary);
}
.step h4{margin-bottom:6px}
.step p{color:var(--muted);font-size:15px;margin:0}
/* 参数卡 */
.spec-list{display:grid;gap:0}
.spec-row{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px dashed var(--line)}
.spec-row:last-child{border-bottom:0}
.spec-row dt{color:var(--muted);font-size:14px;margin:0}
.spec-row dd{margin:0;font-weight:600;font-size:14px;text-align:right}
/* 更新记录 */
.timeline{display:grid;gap:14px}
.timeline-item{
  display:flex;gap:16px;padding:16px 18px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--surface);box-shadow:var(--sh-xs);
  transition:transform var(--ease),border-color var(--ease);
}
.timeline-item:hover{transform:translateY(-2px);border-color:rgba(255,106,31,.4)}
.timeline-item time{font-size:13px;color:var(--muted);min-width:88px;flex-shrink:0}
.timeline-item p{margin:0;font-size:15px}
/* FAQ */
.faq-wrap{max-width:860px;margin:0 auto}
.faq{display:grid;gap:12px}
.faq details{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);
  box-shadow:var(--sh-xs);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq details[open]{border-color:rgba(255,106,31,.45);box-shadow:var(--sh-md)}
.faq summary{
  list-style:none;cursor:pointer;padding:18px 56px 18px 20px;font-weight:600;font-size:16px;
  min-height:56px;display:flex;align-items:center;position:relative;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:20px;color:var(--primary);transition:transform var(--ease);
}
.faq details[open] summary::after{content:"−";transform:translateY(-50%) rotate(180deg)}
.faq .faq-body{padding:0 20px 20px;color:var(--muted);font-size:15px}
.faq .faq-body p{margin:0}
/* CTA 带 */
.cta-band{background:var(--ink);color:var(--on-dark);text-align:center;position:relative;overflow:hidden}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(circle at 20% 20%,rgba(255,106,31,.18),transparent 55%),
                   radial-gradient(circle at 82% 78%,rgba(23,224,196,.14),transparent 55%);
}
.cta-band .grid-container{position:relative;z-index:2}
.cta-band h2{font-size:24px;color:#fff;margin-bottom:12px}
@media (min-width:1024px){.cta-band h2{font-size:30px}}
.cta-band p{color:var(--on-dark-muted);max-width:640px;margin:0 auto 26px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
@media (max-width:639px){.cta-actions{flex-direction:column}}
/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:var(--on-dark-muted);padding:56px 0 24px;border-top:1px solid var(--line-dark)}
@media (min-width:1024px){.site-footer{padding:72px 0 28px}}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}}
.footer-brand p{font-size:14px;margin:14px 0 16px;max-width:300px}
.footer-brand .brand-mark{background:rgba(255,106,31,.16);border-color:rgba(255,106,31,.34)}
.qr-box{
  display:inline-flex;align-items:center;justify-content:center;text-align:center;
  width:132px;height:96px;border:1px dashed var(--line-dark);border-radius:var(--r-sm);
  font-size:12px;color:var(--on-dark-muted);padding:8px;
}
.site-footer h4{color:var(--on-dark);font-size:15px;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;transition:color var(--ease),transform var(--ease)}
.footer-links a:hover{color:var(--accent);transform:translateX(2px)}
.footer-bottom{
  margin-top:36px;padding-top:18px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category2 */
:root{
  --primary:#FF6A1F;
  --primary-hover:#E4550E;
  --accent:#17E0C4;
  --gold:#FFD34E;
  --ink:#14121A;
  --ink-surface:#1F1B29;
  --bg:#F7F5F2;
  --bg-alt:#F1EDE8;
  --surface:#FFFFFF;
  --text:#1D1B23;
  --muted:#5A5764;
  --on-dark:#F3F1EE;
  --on-dark-muted:#A9A3B5;
  --line:#E6E2DC;
  --line-dark:rgba(255,255,255,.10);
  --r-lg:16px;
  --r-md:12px;
  --r-btn:10px;
  --r-img:14px;
  --r-pill:999px;
  --sh-xs:0 1px 2px rgba(29,27,35,.06);
  --sh-md:0 8px 24px rgba(29,27,35,.08);
  --sh-glow:0 10px 30px rgba(255,106,31,.28);
  --sp-section:56px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
}
@media (min-width:640px){:root{--sp-section:72px}}
@media (min-width:1024px){:root{--sp-section:96px}}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:.2px}
:focus-visible{outline:3px solid rgba(255,106,31,.4);outline-offset:2px;border-radius:4px}
.grid-container{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media (min-width:640px){.grid-container{padding-left:28px;padding-right:28px}}
@media (min-width:1024px){.grid-container{padding-left:32px;padding-right:32px}}
.section{padding-top:var(--sp-section);padding-bottom:var(--sp-section)}
.section--alt{background:var(--bg-alt)}
.section--dark{background:var(--ink);color:var(--on-dark)}
.section--white{background:var(--surface)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1.5px solid transparent;cursor:pointer;text-align:center;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out,border-color .18s ease-out,color .18s ease-out;
}
@media (min-width:640px){.btn{height:44px}}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--sh-xs)}
.btn-primary:hover{background:var(--primary-hover);box-shadow:var(--sh-glow)}
.btn-outline{border-color:var(--primary);color:var(--primary);background:transparent}
.btn-outline:hover{background:rgba(255,106,31,.08)}
.btn-ghost{border-color:rgba(255,255,255,.2);color:var(--on-dark);background:transparent}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}

/* ---------- 徽章 / 标签 ---------- */
.pill{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 12px;
  border-radius:var(--r-pill);background:#FFEDE2;color:var(--primary);
  font-size:13px;font-weight:600;line-height:1;
}
.pill-dark{background:rgba(23,224,196,.14);color:var(--accent)}
.badge-new{background:var(--gold);color:#3A2C00;font-size:11px;font-weight:700;height:20px;padding:0 8px;border-radius:var(--r-pill);display:inline-flex;align-items:center}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;
  transition:background-color .25s ease-out,box-shadow .25s ease-out,border-color .25s ease-out;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(20,18,26,.96);
  border-bottom-color:var(--line-dark);
  box-shadow:var(--sh-md);
  backdrop-filter:blur(10px);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px}
@media (min-width:1024px){.header-inner{height:72px}}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{display:grid;grid-template-columns:repeat(2,7px);gap:3px}
.brand-mark span{width:7px;height:7px;border-radius:2px;background:var(--primary);display:block}
.brand-mark span:nth-child(2){background:var(--accent)}
.brand-mark span:nth-child(3){background:var(--gold)}
.brand-mark span:nth-child(4){background:var(--primary-hover)}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text b{font-size:16px;font-weight:700;color:var(--on-dark);letter-spacing:.5px}
.brand-text i{font-style:normal;font-size:11px;color:var(--on-dark-muted);letter-spacing:2px}
.nav-main{display:none;align-items:center;gap:26px}
@media (min-width:1024px){.nav-main{display:flex}}
.nav-main a{
  position:relative;font-size:15px;color:rgba(243,241,238,.82);padding:6px 0;font-weight:400;
  transition:color .18s ease-out;
}
.nav-main a::after{
  content:"";position:absolute;left:0;bottom:0;height:3px;width:0;border-radius:2px;
  background:var(--primary);transition:width .2s ease-out;
}
.nav-main a:hover{color:var(--on-dark)}
.nav-main a:hover::after{width:100%}
.nav-main a.is-active{color:var(--on-dark);font-weight:600}
.nav-main a.is-active::after{width:100%}
.header-actions{display:flex;align-items:center;gap:10px}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-btn);border:1.5px solid rgba(255,255,255,.2);
  background:transparent;color:var(--on-dark);cursor:pointer;
  transition:border-color .18s ease-out,color .18s ease-out,transform .18s ease-out;
}
.icon-btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.hamburger{
  width:44px;height:44px;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border-radius:var(--r-btn);border:1.5px solid rgba(255,255,255,.2);background:transparent;cursor:pointer;
}
@media (min-width:1024px){.hamburger{display:none}}
.hamburger span{display:block;width:18px;height:2px;background:var(--on-dark);border-radius:2px}
.search-panel{
  background:rgba(20,18,26,.98);border-top:1px solid var(--line-dark);
  padding:16px 0;
}
.search-panel[hidden]{display:none}
.search-form{display:flex;gap:10px;max-width:640px;margin:0 auto}
.search-form input{
  flex:1;height:44px;border-radius:var(--r-btn);border:1.5px solid var(--line-dark);
  background:var(--ink-surface);color:var(--on-dark);padding:0 14px;font-size:15px;
}
.search-form input::placeholder{color:var(--on-dark-muted)}
.search-form input:focus{border-color:var(--primary);outline:3px solid rgba(255,106,31,.4);outline-offset:1px}

/* ---------- 抽屉 ---------- */
.off-canvas.position-right{background:var(--ink);border-left:1px solid var(--line-dark)}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 20px;border-bottom:1px solid var(--line-dark);
}
.drawer-head b{color:var(--on-dark);font-size:15px;letter-spacing:1px}
.drawer-close{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  background:transparent;border:1.5px solid rgba(255,255,255,.2);border-radius:var(--r-btn);
  color:var(--on-dark);cursor:pointer;
}
.drawer-close:hover{border-color:var(--accent);color:var(--accent)}
.drawer-nav{display:flex;flex-direction:column;padding:12px 20px 4px}
.drawer-nav a{
  color:var(--on-dark-muted);font-size:15px;padding:14px 0;
  border-bottom:1px solid var(--line-dark);transition:color .18s ease-out,padding-left .18s ease-out;
}
.drawer-nav a:hover{color:var(--accent);padding-left:6px}
.drawer-nav a.is-active{color:var(--primary);font-weight:600}
.drawer-foot{padding:20px}
.drawer-foot .btn{margin-bottom:14px}
.drawer-foot small{display:block;color:var(--on-dark-muted);font-size:12px;line-height:1.7}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--on-dark-muted);overflow-x:auto;white-space:nowrap;padding:0;margin-bottom:22px}
.breadcrumb a{color:var(--on-dark-muted);transition:color .18s ease-out}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb span.sep{opacity:.5}
.breadcrumb .current{color:rgba(243,241,238,.6)}

/* ---------- 内页首屏 ---------- */
.page-hero{
  position:relative;background:var(--ink);color:var(--on-dark);overflow:hidden;
  padding-top:104px;padding-bottom:56px;
}
@media (min-width:1024px){.page-hero{padding-top:140px;padding-bottom:88px}}
.page-hero__bg{
  position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity:.26;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.04) 0 1px,transparent 1px 5px);
}
.page-hero .grid-container{position:relative;z-index:2}
.page-hero h1{font-size:28px;margin:16px 0 14px;color:var(--on-dark)}
@media (min-width:1024px){.page-hero h1{font-size:42px}}
.page-hero .lead{
  font-size:16px;color:var(--on-dark-muted);max-width:620px;line-height:1.85;margin-bottom:26px;
}
.hero-actions{display:flex;flex-direction:column;gap:12px}
@media (min-width:640px){.hero-actions{flex-direction:row;align-items:center}}
.hero-visual{position:relative;margin-top:32px}
@media (min-width:1024px){.hero-visual{margin-top:0}}
.hero-visual img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-img);box-shadow:var(--sh-glow);border:1px solid var(--line-dark);
}
.hero-facts{display:flex;flex-wrap:wrap;gap:24px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line-dark)}
.hero-facts div{min-width:120px}
.hero-facts b{display:block;font-family:var(--font-num);font-size:24px;color:var(--primary);line-height:1.2}
.hero-facts span{font-size:13px;color:var(--on-dark-muted)}

/* ---------- 通用标题 ---------- */
.section-head{max-width:720px;margin-bottom:36px}
.section-head h2{font-size:22px;margin-bottom:12px}
@media (min-width:1024px){.section-head h2{font-size:30px}}
.section-head p{color:var(--muted);margin:0;font-size:16px;line-height:1.85}
.section--dark .section-head h2{color:var(--on-dark)}
.section--dark .section-head p{color:var(--on-dark-muted)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--primary);letter-spacing:1px;margin-bottom:12px;
}
.eyebrow i{width:18px;height:2px;background:var(--primary);display:block;border-radius:2px}

/* ---------- 对比双列 ---------- */
.compare-grid{display:grid;gap:24px;grid-template-columns:1fr}
@media (min-width:900px){.compare-grid{grid-template-columns:1fr 1fr;gap:32px}}
.compare-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh-xs);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
  height:100%;
}
.compare-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:rgba(255,106,31,.4)}
.compare-card__head{display:flex;align-items:center;gap:12px;margin-bottom:8px}
.compare-ico{
  width:44px;height:44px;border-radius:var(--r-md);display:inline-flex;align-items:center;justify-content:center;
  background:#FFEDE2;color:var(--primary);font-size:18px;flex-shrink:0;
}
.compare-card__head h3{font-size:18px}
@media (min-width:1024px){.compare-card__head h3{font-size:22px}}
.compare-card > p{color:var(--muted);font-size:14px;margin:6px 0 18px}
.param-list li{
  display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  padding:12px 0;border-top:1px dashed var(--line);font-size:14px;
}
.param-list li:first-child{border-top:0}
.param-list .k{color:var(--muted);flex-shrink:0}
.param-list .v{font-weight:600;text-align:right;font-family:var(--font-num)}

/* ---------- 参数卡网格 ---------- */
.card-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:640px){.card-grid{grid-template-columns:1fr 1fr;gap:24px}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.mod-card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh-xs);clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.mod-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:rgba(255,106,31,.4)}
.mod-card .mod-ico{
  width:42px;height:42px;border-radius:var(--r-md);display:inline-flex;align-items:center;justify-content:center;
  border:1.5px solid var(--line);color:var(--primary);font-size:17px;margin-bottom:16px;
}
.mod-card h3{font-size:17px;margin-bottom:8px}
.mod-card p{color:var(--muted);font-size:14px;line-height:1.75;margin-bottom:16px}
.mod-meta{display:flex;flex-wrap:wrap;gap:8px;padding-top:14px;border-top:1px solid var(--line)}
.mod-meta span{
  font-size:12px;color:var(--muted);background:var(--bg-alt);
  border-radius:var(--r-pill);padding:4px 10px;
}

/* ---------- 设备差异 ---------- */
.device-grid{display:grid;gap:24px;grid-template-columns:1fr}
@media (min-width:900px){.device-grid{grid-template-columns:1fr 1fr;gap:32px}}
.device-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-xs);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.device-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:rgba(255,106,31,.4)}
.device-card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0}
.device-card__body{padding:24px}
.device-card__body h3{font-size:18px;margin-bottom:10px}
.device-card__body p{color:var(--muted);font-size:14px;margin-bottom:16px}
.tick-list li{display:flex;gap:10px;align-items:flex-start;font-size:14px;padding:6px 0;color:var(--text)}
.tick-list i{color:var(--accent);margin-top:5px;font-size:12px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-accordion{border:0;background:transparent;margin:0}
.faq-accordion .accordion-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-xs);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.faq-accordion .accordion-item:hover{border-color:rgba(255,106,31,.4)}
.faq-accordion .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;min-height:56px;font-size:15px;font-weight:600;color:var(--text);
  border:0;background:transparent;line-height:1.6;
}
.faq-accordion .accordion-title::before{display:none}
.faq-accordion .accordion-title::after{
  content:"+";flex-shrink:0;width:24px;height:24px;border-radius:50%;
  background:#FFEDE2;color:var(--primary);font-size:16px;font-weight:700;
  display:inline-flex;align-items:center;justify-content:center;line-height:1;
  transition:transform .2s ease-out,background-color .2s ease-out;
}
.faq-accordion .accordion-item.is-active .accordion-title::after{
  content:"−";background:var(--primary);color:#fff;transform:rotate(180deg);
}
.faq-accordion .accordion-content{
  display:block;background:transparent;border:0;border-top:1px solid var(--line);
  padding:16px 20px 20px;color:var(--muted);font-size:14.5px;line-height:1.85;
}
.faq-accordion .accordion-content p{margin:0}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;background:var(--ink);color:var(--on-dark);
  padding-top:64px;padding-bottom:64px;overflow:hidden;text-align:center;
}
@media (min-width:1024px){.cta-band{padding-top:96px;padding-bottom:96px}}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.2;
  background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.04) 0 1px,transparent 1px 5px);
}
.cta-band .grid-container{position:relative;z-index:2}
.cta-band h2{font-size:22px;margin-bottom:12px;color:var(--on-dark)}
@media (min-width:1024px){.cta-band h2{font-size:30px}}
.cta-band p{color:var(--on-dark-muted);max-width:620px;margin:0 auto 28px}
.cta-actions{display:flex;flex-direction:column;gap:12px;justify-content:center}
@media (min-width:640px){.cta-actions{flex-direction:row;flex-wrap:wrap}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--on-dark-muted);padding-top:56px}
@media (min-width:1024px){.site-footer{padding-top:80px}}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.footer-brand p{font-size:14px;line-height:1.85;margin:16px 0 18px;max-width:300px}
.footer-brand .brand{margin-bottom:4px}
.qr-box{
  display:inline-flex;align-items:center;justify-content:center;text-align:center;
  width:132px;height:132px;border:1px dashed var(--line-dark);border-radius:var(--r-md);
  font-size:12px;color:var(--on-dark-muted);padding:12px;line-height:1.6;
}
.site-footer h4{font-size:15px;color:var(--on-dark);margin-bottom:16px;font-weight:600}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:var(--on-dark-muted);transition:color .18s ease-out,transform .18s ease-out}
.footer-links a:hover{color:var(--accent);transform:translateX(3px)}
.footer-bottom{
  margin-top:40px;padding:20px 0;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;
  font-size:13px;color:var(--on-dark-muted);
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
}

/* roulang page: category3 */
:root{
  --primary:#FF6A1F;
  --primary-hover:#E4550E;
  --primary-soft:#FFEDE2;
  --accent:#17E0C4;
  --spark:#FFD34E;
  --ink:#14121A;
  --ink-surface:#1F1B29;
  --bg:#F7F5F2;
  --alt:#F1EDE8;
  --card:#FFFFFF;
  --text:#1D1B23;
  --muted:#5A5764;
  --on-dark:#F3F1EE;
  --on-dark-muted:#A9A3B5;
  --line:#E6E2DC;
  --line-dark:rgba(255,255,255,.10);
  --danger:#D93A3A;

  --r-lg:16px;
  --r-md:12px;
  --r-btn:10px;
  --r-img:14px;
  --r-pill:999px;

  --sh-xs:0 1px 2px rgba(29,27,35,.06);
  --sh-md:0 8px 24px rgba(29,27,35,.08);
  --sh-glow:0 10px 30px rgba(255,106,31,.28);

  --sec:56px;

  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
@media (min-width:640px){ :root{ --sec:72px; } }
@media (min-width:1024px){ :root{ --sec:96px; } }

*,*::before,*::after{ box-sizing:border-box; }
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:92px;
}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6,p,figure,ul,ol,dl,dd{margin:0;padding:0;}
h1,h2,h3,h4{font-weight:700;line-height:1.25;color:inherit;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease-out;}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;}
:focus-visible{outline:3px solid rgba(255,106,31,.4);outline-offset:2px;border-radius:4px;}

.grid-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:640px){ .grid-container{padding-left:28px;padding-right:28px;} }
@media (min-width:1024px){ .grid-container{padding-left:32px;padding-right:32px;} }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:var(--r-btn);
  border:1.5px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  text-align:center;
  cursor:pointer;
  transition:transform .18s ease-out,background .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
@media (max-width:639px){ .btn{height:48px;width:100%;} }
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--sh-xs);}
.btn-primary:hover{background:var(--primary-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-glow);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.28);color:var(--on-dark);}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px);}
.btn-outline{background:#fff;border-color:var(--line);color:var(--text);}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);box-shadow:var(--sh-md);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}

.icon-btn{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;
  border:1px solid var(--line);
  background:transparent;
  color:var(--text);
  transition:transform .18s ease-out,border-color .18s ease-out,color .18s ease-out,background .18s ease-out;
}
.icon-btn:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);}
.icon-btn:active{transform:translateY(1px);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,245,242,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:background .24s ease-out,border-color .24s ease-out,box-shadow .24s ease-out;
}
.site-header.is-solid{
  background:var(--ink);
  border-bottom-color:var(--line-dark);
  box-shadow:var(--sh-md);
}
.nav-shell{display:flex;align-items:center;gap:14px;height:64px;}
@media (min-width:1024px){ .nav-shell{height:72px;gap:24px;} }

.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--ink);
  display:grid;grid-template-columns:repeat(2,1fr);gap:3px;padding:6px;
  transition:background .24s ease-out;
}
.brand-mark span{display:block;border-radius:2px;background:var(--primary);}
.brand-mark span:nth-child(2){background:var(--accent);}
.brand-mark span:nth-child(3){background:var(--spark);}
.brand-mark span:nth-child(4){background:var(--primary);}
.brand-text{display:flex;flex-direction:column;line-height:1.05;}
.brand-text b{font-size:17px;font-weight:700;letter-spacing:.5px;color:var(--text);transition:color .24s ease-out;}
.brand-text i{font-style:normal;font-size:11px;letter-spacing:2px;color:var(--muted);transition:color .24s ease-out;}

.nav-main{display:none;}
@media (min-width:1024px){
  .nav-main{display:flex;align-items:center;gap:26px;margin-left:auto;}
}
.nav-main a{
  position:relative;
  padding:6px 0;
  font-size:15px;
  font-weight:500;
  color:var(--text);
  transition:color .18s ease-out;
}
.nav-main a::after{
  content:"";
  position:absolute;left:0;bottom:0;
  width:0;height:3px;border-radius:2px;background:var(--primary);
  transition:width .2s ease-out;
}
.nav-main a:hover::after{width:100%;}
.nav-main a.is-active{font-weight:600;color:var(--primary);}
.nav-main a.is-active::after{width:100%;}

.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
@media (min-width:1024px){ .nav-actions{margin-left:0;} }

.site-header.is-solid .brand-mark{background:var(--ink-surface);}
.site-header.is-solid .brand-text b{color:var(--on-dark);}
.site-header.is-solid .brand-text i{color:var(--on-dark-muted);}
.site-header.is-solid .nav-main a{color:var(--on-dark-muted);}
.site-header.is-solid .nav-main a.is-active{color:var(--primary);}
.site-header.is-solid .icon-btn{color:var(--on-dark);border-color:var(--line-dark);}
.site-header.is-solid .icon-btn:hover{color:var(--accent);border-color:var(--accent);}

@media (max-width:1023px){
  .nav-actions .btn,
  .nav-actions .icon-btn[data-open]{display:none;}
}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;z-index:80;
  background:rgba(20,18,26,.55);
  opacity:0;visibility:hidden;
  transition:opacity .24s ease-out,visibility .24s ease-out;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:90;
  width:84vw;max-width:360px;
  background:var(--ink);
  color:var(--on-dark);
  padding:18px 20px 32px;
  overflow-y:auto;
  transform:translateX(102%);
  transition:transform .26s ease-out;
  display:flex;flex-direction:column;gap:20px;
}
.drawer.is-open{transform:none;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.drawer-head .brand-text b{color:var(--on-dark);}
.drawer-head .brand-text i{color:var(--on-dark-muted);}
.drawer-head .brand-mark{background:var(--ink-surface);}
.drawer-head .icon-btn{color:var(--on-dark);border-color:var(--line-dark);}
.drawer-nav{display:grid;gap:2px;}
.drawer-nav a{
  padding:14px 4px;
  font-size:16px;
  font-weight:500;
  color:var(--on-dark-muted);
  border-bottom:1px solid var(--line-dark);
  transition:color .18s ease-out,padding-left .18s ease-out;
}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--primary);padding-left:8px;}
.drawer-note{font-size:12px;color:var(--on-dark-muted);margin-top:auto;}
body.nav-open{overflow:hidden;}

/* ---------- 搜索弹层 ---------- */
.reveal.search-reveal{
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  box-shadow:var(--sh-md);
  padding:28px;
  background:#fff;
  max-width:560px;
}
.search-reveal h3{font-size:20px;margin-bottom:6px;}
.search-reveal p{color:var(--muted);font-size:14px;margin-bottom:18px;}
.search-form{display:flex;flex-wrap:wrap;gap:12px;}
.search-form .field{flex:1 1 220px;display:flex;flex-direction:column;gap:8px;}
.search-form label{font-size:13px;color:var(--muted);}
.search-form input{
  height:44px;
  border-radius:var(--r-btn);
  border:1.5px solid var(--line);
  padding:0 14px;
  background:#fff;
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.search-form input:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(255,106,31,.4);
}
.search-reveal .close-button{
  position:absolute;top:14px;right:16px;
  width:36px;height:36px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--muted);font-size:22px;line-height:1;
}
.search-reveal .close-button:hover{color:var(--primary);background:var(--primary-soft);}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background:var(--ink);
  color:var(--on-dark);
  padding:48px 0 var(--sec);
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.22;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.04) 0 1px,transparent 1px 5px);
}
.hero .grid-container{position:relative;z-index:2;}

.crumbs{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--on-dark-muted);
  margin-bottom:22px;
  white-space:nowrap;overflow-x:auto;
  scrollbar-width:none;
}
.crumbs::-webkit-scrollbar{display:none;}
.crumbs a{color:var(--on-dark-muted);}
.crumbs a:hover{color:var(--accent);}
.crumbs i{font-size:10px;opacity:.6;}
.crumbs .current{color:var(--on-dark);}

.hero-grid{display:grid;gap:36px;align-items:center;}
@media (min-width:1024px){ .hero-grid{grid-template-columns:1.08fr .92fr;gap:56px;} }

.pill{
  display:inline-flex;align-items:center;gap:8px;
  height:28px;padding:0 14px;
  border-radius:var(--r-pill);
  background:rgba(255,106,31,.16);
  border:1px solid rgba(255,106,31,.36);
  color:#FFB687;
  font-size:13px;font-weight:600;
  margin-bottom:20px;
}
.hero h1{
  font-size:28px;
  line-height:1.25;
  letter-spacing:.4px;
  color:var(--on-dark);
  margin-bottom:18px;
}
@media (min-width:1024px){ .hero h1{font-size:42px;} }
.hero-sub{
  font-size:16px;
  line-height:1.8;
  color:var(--on-dark-muted);
  max-width:600px;
}
@media (min-width:1024px){ .hero-sub{font-size:17px;} }
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
@media (max-width:639px){ .hero-actions{flex-direction:column;} }

.hero-facts{
  display:flex;flex-wrap:wrap;gap:26px;
  margin-top:34px;padding-top:24px;
  border-top:1px solid var(--line-dark);
}
.hero-facts li{display:flex;flex-direction:column;gap:2px;}
.hero-facts b{font-size:24px;font-weight:700;color:var(--primary);line-height:1.2;}
.hero-facts span{font-size:13px;color:var(--on-dark-muted);}

.shot{
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  background:#fff;
  box-shadow:var(--sh-md);
}
.shot img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;}
.shot--glow{border-color:rgba(255,106,31,.35);box-shadow:var(--sh-glow);}
.hero .shot{border-color:var(--line-dark);}

/* ---------- 板块通用 ---------- */
.section{padding:var(--sec) 0;}
.section--white{background:#fff;}
.section--alt{background:var(--alt);}
.section--ink{background:var(--ink);color:var(--on-dark);}

.sec-head{max-width:700px;margin-bottom:40px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:1.5px;
  color:var(--primary);
  margin-bottom:12px;
}
.eyebrow::before{
  content:"";width:8px;height:8px;border-radius:2px;background:var(--primary);
}
.sec-title{font-size:22px;margin-bottom:12px;}
@media (min-width:1024px){ .sec-title{font-size:30px;} }
.sec-desc{color:var(--muted);font-size:16px;}
.section--ink .sec-desc{color:var(--on-dark-muted);}

/* ---------- 图文交替 ---------- */
.split{display:grid;gap:28px;align-items:center;}
.split + .split{margin-top:56px;}
@media (min-width:1024px){
  .split{grid-template-columns:1.02fr .98fr;gap:56px;}
  .split + .split{margin-top:72px;}
  .split--reverse .split-text{order:2;}
  .split--reverse .split-media{order:1;}
}
.split h3{font-size:18px;margin:14px 0 12px;}
@media (min-width:1024px){ .split h3{font-size:22px;} }
.split p{color:var(--muted);}
.num-axis{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:42px;height:28px;padding:0 12px;
  border-radius:var(--r-pill);
  background:var(--primary-soft);
  color:var(--primary);
  font-size:13px;font-weight:700;letter-spacing:1px;
}
.split-media .shot img{aspect-ratio:4/3;}

.spec-list{display:grid;gap:10px;margin-top:18px;}
.spec-list li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  color:var(--muted);
}
.spec-list li::before{
  content:"";position:absolute;left:0;top:.68em;
  width:8px;height:8px;border-radius:2px;background:var(--accent);
}

/* ---------- 参数速查卡 ---------- */
.spec-cards{display:grid;gap:20px;grid-template-columns:1fr;}
@media (min-width:640px){ .spec-cards{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .spec-cards{grid-template-columns:repeat(3,1fr);gap:24px;} }

.spec-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px;
  box-shadow:var(--sh-xs);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.spec-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:rgba(255,106,31,.4);}
.spec-card-head{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.spec-card-head i{
  width:40px;height:40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary);font-size:17px;
}
.spec-card-head h3{font-size:18px;}
.spec-card-head span{display:block;font-size:13px;color:var(--muted);font-weight:400;}
.spec-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:14px;
  padding:11px 0;
  border-bottom:1px dashed var(--line);
  font-size:14px;
}
.spec-row:last-child{border-bottom:0;padding-bottom:0;}
.spec-row dt{color:var(--muted);}
.spec-row dd{font-weight:600;text-align:right;}
.spec-tag{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;margin-top:16px;
  border-radius:var(--r-pill);
  background:var(--primary-soft);color:var(--primary);
  font-size:13px;font-weight:600;
}
.spec-tag.is-accent{background:rgba(23,224,196,.14);color:#0E9C89;}

/* ---------- 步骤时间轴 ---------- */
.timeline{display:grid;gap:20px;margin-top:8px;}
@media (min-width:1024px){ .timeline{grid-template-columns:repeat(4,1fr);gap:22px;} }
.tl-item{
  position:relative;
  background:var(--ink-surface);
  border:1px solid var(--line-dark);
  border-radius:var(--r-lg);
  padding:22px;
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.tl-item:hover{transform:translateY(-2px);border-color:rgba(255,106,31,.5);box-shadow:var(--sh-glow);}
.tl-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  background:rgba(255,106,31,.18);
  color:#FFB687;
  font-size:14px;font-weight:700;
  margin-bottom:14px;
}
.tl-item h3{font-size:17px;color:var(--on-dark);margin-bottom:8px;}
.tl-item p{font-size:14px;line-height:1.75;color:var(--on-dark-muted);}
@media (min-width:1024px){
  .tl-item::after{
    content:"";position:absolute;top:38px;right:-22px;
    width:22px;height:2px;background:rgba(255,106,31,.4);
  }
  .tl-item:last-child::after{display:none;}
}

/* ---------- 更新动态 ---------- */
.news-list{display:grid;gap:16px;}
@media (min-width:1024px){ .news-list{grid-template-columns:repeat(3,1fr);gap:20px;} }
.news-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:22px;
  box-shadow:var(--sh-xs);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.news-item:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:rgba(255,106,31,.4);}
.news-item time{
  display:inline-block;
  font-size:13px;color:var(--muted);
  margin-bottom:10px;
}
.news-item h3{font-size:17px;margin-bottom:10px;}
.news-item p{font-size:14px;color:var(--muted);line-height:1.75;}

/* ---------- FAQ ---------- */
.faq-acc{max-width:860px;border:0;background:transparent;}
.faq-acc .accordion-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  margin-bottom:14px;
  overflow:hidden;
  box-shadow:var(--sh-xs);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.faq-acc .accordion-item:hover{border-color:rgba(255,106,31,.4);box-shadow:var(--sh-md);}
.faq-acc .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;
  padding:16px 22px;
  background:#fff;
  border:0;
  font-size:16px;font-weight:600;color:var(--text);
  line-height:1.5;
}
.faq-acc .accordion-title:hover,
.faq-acc .accordion-title:focus{background:#fff;color:var(--primary);}
.faq-acc .accordion-title::before{
  content:"+";
  position:static;float:none;order:2;
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;flex:0 0 26px;
  border-radius:8px;
  background:var(--primary-soft);color:var(--primary);
  font-size:18px;line-height:1;font-weight:600;
  transition:transform .2s ease-out;
  margin:0;
}
.faq-acc .accordion-item.is-active .accordion-title::before{content:"−";transform:rotate(180deg);}
.faq-acc .accordion-content{
  padding:0 22px 20px;
  border:0;
  background:#fff;
  color:var(--muted);
  font-size:15px;
  line-height:1.8;
}
.faq-acc .accordion-content p{color:var(--muted);}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  background:var(--ink);
  color:var(--on-dark);
  padding:var(--sec) 0;
  overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.2;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.04) 0 1px,transparent 1px 5px);
}
.cta-band .grid-container{position:relative;z-index:2;}
.cta-inner{max-width:820px;margin:0 auto;text-align:center;}
.cta-inner h2{font-size:22px;margin-bottom:14px;}
@media (min-width:1024px){ .cta-inner h2{font-size:32px;} }
.cta-inner p{color:var(--on-dark-muted);font-size:16px;}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:30px;}
@media (max-width:639px){ .cta-actions{flex-direction:column;} }
.cta-note{margin-top:20px;font-size:13px;color:var(--on-dark-muted);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--on-dark-muted);padding-top:56px;}
.footer-grid{display:grid;gap:32px;}
@media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;} }
.site-footer h4{font-size:15px;color:var(--on-dark);margin-bottom:16px;}
.footer-brand p{font-size:14px;line-height:1.75;margin:16px 0 20px;max-width:330px;}
.site-footer .brand-text i{color:var(--on-dark-muted);}
.site-footer .brand-mark{background:var(--ink-surface);}
.footer-links{display:grid;gap:10px;}
.footer-links a{font-size:14px;color:var(--on-dark-muted);}
.footer-links a:hover{color:var(--accent);}
.qr-box{
  width:132px;height:132px;
  border-radius:12px;
  border:1px dashed var(--line-dark);
  display:flex;align-items:center;justify-content:center;
  text-align:center;padding:12px;
  font-size:12px;color:var(--on-dark-muted);
}
.footer-bottom{
  margin-top:44px;
  border-top:1px solid var(--line-dark);
  padding:18px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;
}
.footer-bottom a{color:var(--on-dark-muted);}
.footer-bottom a:hover{color:var(--accent);}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *{transition:none !important;animation:none !important;}
}