/* roulang page: index */
:root{
  --bg:#0B0C11;
  --surface:#14161D;
  --card:#171A22;
  --line:#232733;
  --brand:#FF6A2B;
  --brand-deep:#E4531A;
  --brand2:#2BE3C0;
  --ink:#F4F6FA;
  --ink-2:#A7AEBD;
  --ink-3:#6F7787;
  --ok:#35C46A;
  --warn:#FFB020;
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow:0 12px 32px rgba(0,0,0,.45);
  --ease:cubic-bezier(.16,.84,.44,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.75;letter-spacing:0;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
dl,dd,dt,figure{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.num{font-family:"Oswald","DIN Alternate",ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:600;letter-spacing:.01em}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:0;z-index:70;padding:12px 0}
.nav-panel{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:14px;
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,0) 42%),var(--card);
  border:1px solid var(--line);border-radius:18px;padding:10px 14px;box-shadow:var(--shadow);
}
.nav-logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  color:#14161D;font-weight:800;font-size:18px;line-height:1;
}
.logo-text{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.nav-chips{display:none;flex:1 1 auto;justify-content:center;gap:8px}
@media (min-width:1024px){.nav-chips{display:flex}}
.nav-chip{
  display:inline-flex;align-items:center;gap:7px;padding:8px 14px;border-radius:999px;
  border:1px solid var(--line);font-size:14px;color:var(--ink-2);
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.nav-chip i{font-size:13px}
.nav-chip:hover{background:rgba(255,106,43,.10);border-color:rgba(255,106,43,.5);color:var(--ink);transform:translateY(-1px)}
.nav-chip:hover i{color:var(--brand)}
.nav-chip.active{background:rgba(255,106,43,.12);border-color:var(--brand);color:var(--brand);font-weight:600}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-toggle{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  display:grid;place-items:center;font-size:16px;color:var(--ink);
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
@media (min-width:1024px){.nav-toggle{display:none}}

.drawer{
  position:fixed;inset:0;z-index:90;display:none;flex-direction:column;gap:16px;
  padding:18px 18px 0;background:rgba(11,12,17,.98);overflow-y:auto;
}
.drawer.open{display:flex}
.drawer-top{display:flex;align-items:center;justify-content:space-between}
.drawer-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.drawer-card{
  display:flex;flex-direction:column;gap:8px;padding:16px;border-radius:14px;
  border:1px solid var(--line);background:var(--card);font-size:15px;color:var(--ink-2);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.drawer-card i{font-size:18px;color:var(--brand)}
.drawer-card.active{border-color:var(--brand);color:var(--brand);background:rgba(255,106,43,.10)}
.drawer-foot{margin-top:auto;position:sticky;bottom:0;padding:14px 0 18px;background:linear-gradient(180deg,rgba(11,12,17,0),rgba(11,12,17,1) 40%)}
.drawer-foot .btn{width:100%}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:50px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),filter .18s var(--ease);
}
.btn-sm{height:42px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--brand);color:#12141A}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 4px rgba(255,106,43,.16)}
.btn-primary:active{background:var(--brand-deep);transform:translateY(1px)}
.btn-ghost{background:rgba(255,255,255,.02);border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand2);color:var(--brand2);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-link{display:inline-flex;align-items:center;gap:7px;color:var(--brand2);font-weight:600;font-size:15px}
.btn-link i{transition:transform .18s var(--ease)}
.btn-link:hover i{transform:translateX(4px)}
.btn-link:hover{color:#57eed0}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:34px 0 0}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;opacity:.30}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(620px 420px at 76% 26%,rgba(255,106,43,.24),transparent 66%),
    linear-gradient(180deg,rgba(11,12,17,.62),rgba(11,12,17,.94) 78%,var(--bg));
}
.hero-mesh{
  position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.7) 0 1px,transparent 1px 18px);
}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr;gap:44px;align-items:center;padding:36px 0 68px}
@media (min-width:1024px){.hero-grid{grid-template-columns:1.06fr .94fr;gap:56px;padding:52px 0 96px}}
.ver-badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:999px;
  background:rgba(43,227,192,.12);border:1px solid rgba(43,227,192,.45);color:var(--brand2);
  font-size:13px;font-weight:600;
}
.ver-badge .dot-live{width:7px;height:7px;border-radius:50%;background:var(--brand2)}
.hero h1{
  margin:20px 0 0;font-size:clamp(30px,4.6vw,56px);line-height:1.12;font-weight:800;letter-spacing:-.02em;
}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{margin-top:16px;font-size:17px;color:var(--ink-2);max-width:30ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:38px;max-width:520px}
.hero-stat{padding:14px 16px;border-radius:14px;border:1px solid var(--line);background:rgba(23,26,34,.72)}
.hero-stat b{display:block;font-size:22px;color:var(--brand2)}
.hero-stat span{display:block;font-size:12.5px;color:var(--ink-3);margin-top:2px}

.phone{
  position:relative;width:min(296px,80vw);margin:0 auto;aspect-ratio:9/18.6;
  border-radius:40px;border:1px solid var(--line);background:var(--card);padding:12px;
  box-shadow:var(--shadow),0 0 0 1px rgba(255,106,43,.14);
}
.phone::before{
  content:"";position:absolute;inset:-28px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(255,106,43,.22),transparent 72%);z-index:-1;
}
.phone-screen{position:relative;height:100%;border-radius:30px;overflow:hidden;background:var(--surface)}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .32s ease-out}
.slide.active{opacity:1}
.slide img{width:100%;height:100%;object-fit:cover}
.slide-cap{
  position:absolute;left:14px;right:14px;bottom:14px;padding:9px 12px;border-radius:12px;
  background:rgba(11,12,17,.72);border:1px solid var(--line);font-size:12.5px;color:var(--ink-2);
  backdrop-filter:blur(6px);
}
.hero-visual{position:relative}
.dots{display:flex;justify-content:center;gap:8px;margin-top:22px}
.dot{width:26px;height:5px;border-radius:999px;background:var(--line);transition:background .2s var(--ease),width .2s var(--ease)}
.dot.active{background:var(--brand);width:38px}
.dot:hover{background:var(--ink-3)}

/* ---------- sections ---------- */
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:96px 0}}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:34px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.02em}
.eyebrow::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--brand)}
.section-title{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.26;margin-top:10px;letter-spacing:-.01em}
.section-desc{margin-top:12px;font-size:15px;line-height:1.8;color:var(--ink-2);max-width:62ch}

/* ---------- cards ---------- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(255,106,43,.42);box-shadow:var(--shadow),0 0 0 1px rgba(255,106,43,.2)}
.icon-box{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
  background:rgba(255,106,43,.12);border:1px solid rgba(255,106,43,.32);color:var(--brand);font-size:19px;
}
.card h3{font-size:19px;font-weight:600;margin-top:18px}
.card p{font-size:15px;line-height:1.8;color:var(--ink-2);margin-top:10px}

.value-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:1024px){
  .value-grid{grid-template-columns:repeat(12,minmax(0,1fr))}
  .v-a{grid-column:span 7}
  .v-b{grid-column:span 5}
  .v-c{grid-column:span 5}
  .v-d{grid-column:span 7}
}
.value-wide{display:flex;flex-direction:column;justify-content:space-between;gap:22px;min-height:100%}
.value-wide img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img);border:1px solid var(--line)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;font-size:12.5px;
  background:rgba(43,227,192,.12);border:1px solid rgba(43,227,192,.36);color:var(--brand2);
}
.tag-orange{background:rgba(255,106,43,.12);border-color:rgba(255,106,43,.38);color:var(--brand)}

/* ---------- shots scroller ---------- */
.shots-wrap{position:relative}
.shots{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 4px 20px;scrollbar-width:thin}
.shots::-webkit-scrollbar{height:6px}
.shots::-webkit-scrollbar-thumb{background:var(--line);border-radius:999px}
.shot{
  flex:0 0 82%;scroll-snap-align:start;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:14px;transition:border-color .2s var(--ease),transform .2s var(--ease);
}
@media (min-width:768px){.shot{flex:0 0 calc(33.333% - 14px)}}
.shot:hover{border-color:rgba(255,106,43,.42);transform:translateY(-2px)}
.shot img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img)}
.shot h4{font-size:17px;font-weight:600;margin-top:14px}
.shot span{display:block;font-size:12.5px;color:var(--ink-3);margin-top:6px}
.shot-nav{display:none;gap:10px}
@media (min-width:1024px){.shot-nav{display:flex}}
.icon-btn{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:var(--surface);
  display:grid;place-items:center;color:var(--ink-2);transition:all .18s var(--ease);
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}

/* ---------- requirements ---------- */
.req-grid{display:grid;grid-template-columns:1fr;gap:26px}
@media (min-width:1024px){.req-grid{grid-template-columns:7fr 5fr;gap:32px}}
.req-panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:8px 24px}
.req-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.req-row:last-child{border-bottom:0}
.req-row dt{display:flex;align-items:center;gap:10px;font-size:15px;color:var(--ink-2)}
.req-row dt i{color:var(--brand);width:18px;text-align:center}
.req-row dd{font-size:15px;font-weight:600;color:var(--ink);text-align:right}
.dl-panel{background:linear-gradient(180deg,rgba(255,106,43,.08),rgba(23,26,34,0) 42%),var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:26px}
.dl-group{display:grid;grid-template-columns:1fr;gap:12px;margin-top:20px}
@media (min-width:640px){.dl-group{grid-template-columns:1fr 1fr}}
.dl-btn{
  display:flex;align-items:center;gap:14px;min-height:64px;padding:12px 18px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:var(--surface);transition:all .18s var(--ease);
}
.dl-btn:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--shadow)}
.dl-btn i{font-size:22px;color:var(--brand);width:26px;text-align:center}
.dl-btn b{display:block;font-size:15px;font-weight:600}
.dl-btn small{display:block;font-size:12px;color:var(--ink-3);margin-top:2px}
.note{font-size:12.5px;color:var(--ink-3);margin-top:16px;line-height:1.7}

/* ---------- reviews ---------- */
.reviews{columns:1;column-gap:22px}
@media (min-width:768px){.reviews{columns:2}}
.review{
  break-inside:avoid;margin-bottom:22px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.review:hover{border-color:rgba(43,227,192,.4);transform:translateY(-2px)}
.review-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.model-badge{
  padding:5px 12px;border-radius:999px;font-size:12px;color:var(--ink-2);
  background:rgba(255,255,255,.04);border:1px solid var(--line);
}
.stars{display:flex;gap:3px;font-size:13px;color:var(--brand)}
.stars .off{color:var(--line)}
.review p{font-size:15px;line-height:1.82;color:var(--ink-2);margin-top:14px}
.review-meta{display:flex;justify-content:space-between;gap:12px;margin-top:16px;font-size:12.5px;color:var(--ink-3)}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:768px){.news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.news-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.news-card:hover{transform:translateY(-2px);border-color:rgba(255,106,43,.42);box-shadow:var(--shadow),0 0 0 1px rgba(255,106,43,.18)}
.news-cover{display:block;overflow:hidden}
.news-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s var(--ease)}
.news-card:hover .news-cover img{transform:scale(1.03)}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.news-cat{align-self:flex-start;padding:4px 11px;border-radius:999px;font-size:12px;color:var(--brand);background:rgba(255,106,43,.12);border:1px solid rgba(255,106,43,.34)}
.news-title{font-size:18px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .18s var(--ease)}
.news-card:hover .news-title{color:var(--brand2)}
.news-excerpt{font-size:14px;line-height:1.78;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;padding-top:8px;font-size:12.5px;color:var(--ink-3)}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:56px 24px;background:var(--card);border:1px dashed var(--line);border-radius:var(--r-card);text-align:center;
}
.empty-state i{font-size:26px;color:var(--ink-3)}
.empty-state p{color:var(--ink-2);font-size:15px}

/* ---------- faq ---------- */
.faq-wrap{max-width:760px;margin:0 auto}
.faq{border:1px solid var(--line);border-radius:14px;background:var(--card);margin-bottom:12px;transition:border-color .2s var(--ease)}
.faq[open]{border-color:rgba(255,106,43,.4)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;cursor:pointer;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary i{color:var(--ink-3);font-size:14px;transition:transform .2s var(--ease),color .2s var(--ease)}
.faq[open] summary i{transform:rotate(180deg);color:var(--brand)}
.faq p{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--ink-2)}

/* ---------- CTA band ---------- */
.cta-band{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;text-align:left;
  padding:36px;border-radius:22px;border:1px solid var(--line);background:
    radial-gradient(520px 260px at 82% 12%,rgba(255,106,43,.22),transparent 68%),
    var(--card);
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.3}
.cta-band p{color:var(--ink-2);font-size:15px;margin-top:10px;max-width:46ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{background:var(--surface);border-top:1px solid var(--line);padding:60px 0 0;margin-top:24px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:40px}}
.footer-col h4{font-size:14px;font-weight:700;color:var(--brand);letter-spacing:.02em;margin-bottom:16px}
.footer-col p{font-size:14px;line-height:1.8;color:var(--ink-2);max-width:34ch}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:var(--ink-2);transition:color .18s var(--ease),transform .18s var(--ease)}
.footer-links a:hover{color:var(--brand2);transform:translateX(3px)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.qr-mini{
  width:112px;height:112px;border-radius:18px;border:1px dashed var(--line);background:var(--card);
  display:grid;place-items:center;color:var(--ink-3);font-size:24px;
}
.footer-bottom{
  margin-top:44px;border-top:1px solid var(--line);padding:20px 0;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:12.5px;color:var(--ink-3);
}
.footer-bottom a{color:var(--ink-3)}
.footer-bottom a:hover{color:var(--brand2)}

@media (max-width:520px){
  .hero-stats{grid-template-columns:1fr 1fr}
  .btn{height:48px;padding:0 20px;font-size:14.5px}
  .cta-band{padding:26px 20px}
  .card{padding:20px}
}

/* roulang page: article */
:root{
  --bg:#0B0C11;
  --surface:#14161D;
  --card:#171A22;
  --card-2:#1B1F29;
  --line:#232733;
  --line-soft:#2C3140;
  --brand:#FF6A2B;
  --brand-deep:#E4531A;
  --brand2:#2BE3C0;
  --brand2-deep:#0E8E78;
  --ink:#F4F6FA;
  --ink-2:#A7AEBD;
  --ink-3:#6F7787;
  --ok:#35C46A;
  --warn:#FFB020;
  --r-card:18px;
  --r-sm:12px;
  --r-img:14px;
  --shadow:0 12px 32px rgba(0,0,0,.45);
  --shadow-sm:0 8px 22px rgba(0,0,0,.35);
  --t:180ms;
  --ease:ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,dl,dd,dt,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color var(--t) var(--ease)}
button,input,textarea,select{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:rgba(255,106,43,.35);color:#fff}
.mono{font-family:ui-monospace,"DIN Alternate","Oswald",Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;letter-spacing:.01em}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media(min-width:768px){.container{padding-left:32px;padding-right:32px}}

/* ============ HEADER / NAV ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  padding:12px 0;
  background:rgba(11,12,17,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(35,39,51,.7);
}
.nav-panel{
  position:relative;
  display:flex;align-items:center;gap:18px;
  background:linear-gradient(180deg,#1A1E27 0%,var(--card) 100%);
  border:1px solid var(--line);
  border-radius:18px;
  padding:10px 14px;
  box-shadow:0 12px 32px rgba(0,0,0,.45);
  overflow:hidden;
}
.nav-panel::after{
  content:"";position:absolute;left:0;right:0;top:0;height:44%;
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,0));
  pointer-events:none;
}
.nav-logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;position:relative;z-index:1}
.logo-mark{
  width:36px;height:36px;border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#16110C;font-weight:800;font-size:17px;letter-spacing:-.02em;
  box-shadow:0 6px 16px rgba(255,106,43,.28);
}
.logo-text{font-weight:700;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.nav-chips{display:flex;align-items:center;gap:8px;flex:1;justify-content:center;position:relative;z-index:1}
.nav-chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 13px;border-radius:12px;
  border:1px solid var(--line);
  color:var(--ink-2);font-size:14px;line-height:1.4;white-space:nowrap;
  transition:background var(--t) var(--ease),border-color var(--t) var(--ease),color var(--t) var(--ease),transform var(--t) var(--ease);
}
.nav-chip i{font-size:13px;color:var(--ink-3);transition:color var(--t) var(--ease)}
.nav-chip:hover{background:rgba(255,255,255,.045);border-color:var(--line-soft);color:var(--ink);transform:translateY(-1px)}
.nav-chip:hover i{color:var(--brand)}
.nav-chip.active{background:rgba(255,106,43,.12);border-color:rgba(255,106,43,.55);color:var(--ink)}
.nav-chip.active i{color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;position:relative;z-index:1}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);color:var(--ink);
  align-items:center;justify-content:center;font-size:16px;
  transition:border-color var(--t) var(--ease),color var(--t) var(--ease);
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:12px;font-weight:600;border:1px solid transparent;
  transition:background var(--t) var(--ease),border-color var(--t) var(--ease),color var(--t) var(--ease),transform var(--t) var(--ease),filter var(--t) var(--ease);
  cursor:pointer;text-align:center;
}
.btn-primary{background:var(--brand);color:#16110C;min-height:48px;padding:0 24px;font-size:15px}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-primary:active{background:var(--brand-deep);transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink);min-height:48px;padding:0 22px;font-size:15px}
.btn-ghost:hover{border-color:var(--brand2);color:var(--brand2)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;border-radius:12px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand2);font-size:14px;font-weight:600}
.text-link:hover{color:#5DEFD3}
.text-link i{font-size:12px;transition:transform var(--t) var(--ease)}
.text-link:hover i{transform:translateX(3px)}

/* ============ MOBILE DRAWER ============ */
.nav-drawer{
  display:none;position:fixed;inset:0;z-index:90;
  background:rgba(11,12,17,.98);
  backdrop-filter:blur(10px);
  padding:20px;flex-direction:column;gap:18px;overflow-y:auto;
}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:var(--card);color:var(--ink);display:grid;place-items:center;font-size:16px;
  transition:border-color var(--t) var(--ease),color var(--t) var(--ease);
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand)}
.drawer-chips{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.drawer-chips .nav-chip{justify-content:flex-start;padding:14px 16px;font-size:15px;background:var(--card)}
.drawer-cta{margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}
.drawer-cta .btn{width:100%}
body.nav-open{overflow:hidden}

@media(max-width:1079px){
  .nav-chips{display:none}
  .nav-toggle{display:inline-flex}
  body.nav-open .nav-drawer{display:flex}
}
@media(max-width:519px){
  .nav-actions .btn-primary{display:none}
  .logo-text{font-size:16px}
}

/* ============ BREADCRUMB ============ */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12px;line-height:1.6;color:var(--ink-3);
  margin-bottom:18px;
}
.crumb a{color:var(--ink-3)}
.crumb a:hover{color:var(--brand2)}
.crumb .sep{color:var(--line-soft)}
.crumb .current{color:var(--brand)}

/* ============ ARTICLE HERO ============ */
.article-hero{padding:32px 0 0}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12px;line-height:1.7;font-weight:500;
  border:1px solid rgba(43,227,192,.35);
  background:rgba(43,227,192,.1);
  color:var(--brand2);
}
.badge-brand{
  border-color:rgba(255,106,43,.4);
  background:rgba(255,106,43,.13);
  color:#FF9463;
}
.article-title{
  font-size:clamp(26px,3.6vw,44px);
  line-height:1.2;
  font-weight:800;
  letter-spacing:-.02em;
  margin:16px 0 0;
  max-width:22ch;
  text-align:left;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;
  margin-top:18px;font-size:13px;color:var(--ink-3);
}
.meta-row span{display:inline-flex;align-items:center;gap:7px}
.meta-row i{color:var(--ink-3);font-size:12px}

/* ============ ARTICLE SHELL ============ */
.article-shell{max-width:920px;margin:0 auto}
.cover-wrap{
  margin-top:28px;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);
  aspect-ratio:16/9;background:var(--card-2);
  box-shadow:var(--shadow);
}
.cover-wrap img{width:100%;height:100%;object-fit:cover}

.paper{
  background:#F7F8FA;
  color:#2A3040;
  border-radius:20px;
  padding:34px 22px;
  margin-top:22px;
  box-shadow:0 18px 44px rgba(0,0,0,.5);
}
@media(min-width:768px){.paper{padding:52px 56px}}

.article-body{max-width:760px;margin:0 auto;font-size:17px;line-height:1.9;color:#2A3040}
.article-body p{margin:0 0 1.1em}
.article-body h2{
  position:relative;
  font-size:24px;font-weight:700;color:#141821;line-height:1.45;
  margin:1.9em 0 .8em;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.3em;
  width:4px;height:.92em;border-radius:2px;background:var(--brand);
}
.article-body h3{
  font-size:19px;font-weight:600;color:var(--brand2-deep);
  line-height:1.5;margin:1.7em 0 .7em;
}
.article-body h4{font-size:17px;font-weight:600;color:#141821;margin:1.5em 0 .6em}
.article-body a{color:#B8451A;text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand)}
.article-body strong{color:#141821;font-weight:600}
.article-body ul{margin:1em 0}
.article-body ul li{position:relative;padding-left:20px;margin:.5em 0}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:7px;height:7px;border-radius:2px;background:var(--brand);
}
.article-body ol{margin:1em 0;padding-left:22px;list-style:decimal}
.article-body ol li{margin:.5em 0}
.article-body blockquote{
  margin:1.4em 0;padding:14px 18px;
  border-left:3px solid var(--brand);
  background:rgba(255,106,43,.07);
  border-radius:0 12px 12px 0;
  color:#3C4356;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  border-radius:12px;margin:1.5em auto;
  box-shadow:0 8px 22px rgba(20,24,33,.14);
}
.article-body figure{margin:1.5em 0}
.article-body figcaption{font-size:13px;color:#6B7280;text-align:center;margin-top:8px;line-height:1.6}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.4em 0;font-size:15px;
}
.article-body th,.article-body td{border:1px solid #DCE0E8;padding:10px 14px;text-align:left}
.article-body thead th{background:#ECEEF3;font-weight:600;color:#141821}
.article-body tbody tr:nth-child(even){background:#F1F3F7}
.article-body hr{border:0;border-top:1px solid #DCE0E8;margin:2em 0}

.empty-state{text-align:center;padding:24px 8px}
.empty-state i{font-size:34px;color:var(--brand);display:block;margin-bottom:14px}
.empty-state h2{font-size:22px;font-weight:700;color:#141821;margin-bottom:10px}
.empty-state p{font-size:15px;color:#5A6274;margin-bottom:22px;line-height:1.8}
.empty-state .btn{min-height:44px}

/* ============ TAGS / POST NAV ============ */
.tag-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:26px;
}
.tag-label{font-size:13px;color:var(--ink-3)}
.tag-row .badge{font-size:12px}
.tag-row .badge-plain{
  border-color:var(--line);background:rgba(255,255,255,.03);color:var(--ink-2);
}

.post-nav{
  display:grid;grid-template-columns:1fr;gap:14px;margin-top:26px;
}
@media(min-width:768px){.post-nav{grid-template-columns:1fr 1fr}}
.post-nav-item{
  display:block;padding:18px 20px;
  border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--card);
  transition:border-color var(--t) var(--ease),transform var(--t) var(--ease),box-shadow var(--t) var(--ease);
}
.post-nav-item:hover{border-color:rgba(255,106,43,.5);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.post-nav-item .pn-label{display:block;font-size:12px;color:var(--ink-3);margin-bottom:6px}
.post-nav-item .pn-title{display:block;font-size:15px;font-weight:600;color:var(--ink);line-height:1.6}
.post-nav-item:hover .pn-title{color:var(--brand2)}
.post-nav-item.next{text-align:left}
.back-line{margin-top:20px}
.back-line a{font-size:14px;color:var(--ink-2);display:inline-flex;align-items:center;gap:8px}
.back-line a:hover{color:var(--brand2)}

/* ============ SECTIONS ============ */
.section{padding:56px 0}
@media(min-width:1024px){.section{padding:88px 0}}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;
  flex-wrap:wrap;margin-bottom:26px;
}
.section-head h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;letter-spacing:-.01em;line-height:1.3}
.section-head p{font-size:14px;color:var(--ink-3);margin-top:8px;max-width:60ch}

/* ============ POST CARDS ============ */
.card-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.card-grid.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.card-grid.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.post-card{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  transition:border-color var(--t) var(--ease),transform var(--t) var(--ease),box-shadow var(--t) var(--ease);
}
.post-card:hover{border-color:rgba(255,106,43,.5);transform:translateY(-2px);box-shadow:var(--shadow)}
.post-thumb{aspect-ratio:16/9;background:var(--card-2);overflow:hidden}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 260ms var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{
  font-size:18px;font-weight:600;line-height:1.55;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color var(--t) var(--ease);
}
.post-card:hover .post-body h3{color:var(--brand2)}
.post-body p{
  font-size:14px;color:var(--ink-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  gap:12px;font-size:12px;color:var(--ink-3);padding-top:8px;
  border-top:1px solid var(--line);
}
.post-meta .read{color:var(--brand2);font-weight:600}

/* ============ CTA BAND ============ */
.cta-band{
  position:relative;overflow:hidden;
  display:flex;flex-direction:column;gap:24px;
  padding:34px 26px;
  border:1px solid var(--line);border-radius:22px;
  background:
    radial-gradient(600px 240px at 88% 0%,rgba(255,106,43,.16),transparent 65%),
    linear-gradient(160deg,#1A1E27 0%,var(--card) 100%);
  box-shadow:var(--shadow);
}
@media(min-width:1024px){
  .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:44px 48px;text-align:left}
}
.cta-band h2{font-size:clamp(20px,2.4vw,28px);font-weight:700;line-height:1.35;letter-spacing:-.01em}
.cta-band p{font-size:14px;color:var(--ink-2);margin-top:10px;max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex-shrink:0}

/* ============ FOOTER ============ */
.site-footer{
  margin-top:72px;
  border-top:1px solid var(--line);
  background:var(--surface);
  padding:52px 0 0;
  position:relative;overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;opacity:.5;pointer-events:none;
}
.site-footer .container{position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@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 1.3fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--brand);margin-bottom:14px;letter-spacing:.02em}
.footer-col p{font-size:13px;color:var(--ink-2);line-height:1.85;max-width:32ch}
.footer-links a{display:block;font-size:14px;color:var(--ink-2);padding:5px 0;transition:color var(--t) var(--ease),transform var(--t) var(--ease)}
.footer-links a:hover{color:var(--brand2);transform:translateX(2px)}
.qr-mini{
  width:64px;height:64px;border-radius:14px;
  border:1px dashed var(--line-soft);background:var(--card);
  display:grid;place-items:center;color:var(--ink-3);font-size:22px;
}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px;margin-top:40px;padding:20px 0;
  border-top:1px solid var(--line);
  font-size:12px;color:var(--ink-3);
}
.footer-bottom a{color:var(--ink-2)}
.footer-bottom a:hover{color:var(--brand2)}

/* roulang page: category1 */
:root{
  --bg:#0B0C11;
  --surface:#14161D;
  --card:#171A22;
  --line:#232733;
  --brand:#FF6A2B;
  --brand-deep:#E4531A;
  --brand2:#2BE3C0;
  --ink:#F4F6FA;
  --ink-2:#A7AEBD;
  --ink-3:#6F7787;
  --ok:#35C46A;
  --warn:#FFB020;
  --r-card:18px;
  --r-sm:12px;
  --r-img:14px;
  --shadow:0 12px 32px rgba(0,0,0,.45);
  --shadow-soft:0 10px 26px rgba(0,0,0,.32);
  --num-font:"Oswald","DIN Alternate",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
ul,ol,dl,dd{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:10px}
.num{font-family:var(--num-font);letter-spacing:.01em}

.container{
  width:100%;
  max-width:1200px !important;
  margin-left:auto;
  margin-right:auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:768px){
  .container{padding-left:32px;padding-right:32px}
}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding:12px 0;
  background:linear-gradient(180deg,rgba(11,12,17,.94),rgba(11,12,17,.76));
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(35,39,51,.7);
}
.nav-panel{
  position:relative;
  display:flex;
  align-items:center;
  gap:16px;
  padding:10px 12px;
  background:
    linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,0) 42%),
    var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-soft);
}
.nav-logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  padding:4px 6px;
  border-radius:12px;
}
.logo-mark{
  width:34px;
  height:34px;
  display:grid;
  place-items:center;
  border-radius:10px;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  color:#180D06;
  font-weight:800;
  font-size:17px;
  line-height:1;
  box-shadow:0 6px 16px rgba(255,106,43,.28);
}
.logo-text{
  font-size:17px;
  font-weight:700;
  letter-spacing:.01em;
  white-space:nowrap;
}
.nav-chips{
  display:flex;
  align-items:center;
  gap:8px;
  flex:1 1 auto;
  min-width:0;
}
.nav-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 14px;
  font-size:14px;
  color:var(--ink-2);
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:12px;
  white-space:nowrap;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.nav-chip i{font-size:13px;color:var(--ink-3);transition:color .18s ease-out}
.nav-chip:hover{background:#1B1F29;color:var(--ink);border-color:#2E3444;transform:translateY(-2px)}
.nav-chip:hover i{color:var(--brand)}
.nav-chip.active{
  background:rgba(255,106,43,.12);
  border-color:rgba(255,106,43,.55);
  color:var(--ink);
}
.nav-chip.active i{color:var(--brand)}
.nav-actions{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
  flex:0 0 auto;
}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  place-items:center;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface);
  color:var(--ink-2);
  transition:border-color .18s ease-out,color .18s ease-out;
}
.nav-toggle:hover{border-color:var(--brand2);color:var(--brand2)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  white-space:nowrap;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out,filter .18s ease-out;
}
.btn-primary{background:var(--brand);color:#1A0E07}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 10px 26px rgba(255,106,43,.3)}
.btn-primary:active{background:var(--brand-deep);transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand2);color:#fff}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-lg{height:52px;padding:0 28px}
.btn-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  color:var(--brand2);
  font-size:14px;
  font-weight:600;
  transition:gap .18s ease-out,color .18s ease-out;
}
.btn-link:hover{gap:11px;color:#5BF0D4}

/* ---------- 通用排版 ---------- */
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:92px 0}}
.section-tight{padding:42px 0}
@media (min-width:1024px){.section-tight{padding:60px 0}}
.sec-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-bottom:28px;
}
.sec-title{
  font-size:clamp(24px,3vw,32px);
  font-weight:700;
  line-height:1.28;
  letter-spacing:-.01em;
}
.sec-title .bar{
  display:inline-block;
  width:4px;
  height:22px;
  border-radius:2px;
  background:var(--brand);
  margin-right:12px;
  vertical-align:-3px;
}
.sec-sub{color:var(--ink-2);font-size:15px;margin-top:10px;max-width:64ch}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--ink-3);
  font-family:var(--num-font);
}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  color:var(--ink-3);
  margin-bottom:18px;
  flex-wrap:wrap;
}
.crumbs a{color:var(--ink-3);transition:color .18s ease-out}
.crumbs a:hover{color:var(--brand2)}
.crumbs .sep{color:#3A4050}
.crumbs .current{color:var(--brand)}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:36px 0 0;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.05) 0 1px,transparent 1px 16px);
  opacity:.06;
  pointer-events:none;
}
.page-hero::after{
  content:"";
  position:absolute;
  top:-180px;
  right:-120px;
  width:520px;
  height:520px;
  background:radial-gradient(circle,rgba(255,106,43,.18),transparent 62%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{
  font-size:clamp(30px,4.6vw,52px);
  line-height:1.14;
  font-weight:800;
  letter-spacing:-.02em;
  margin-top:16px;
  max-width:22ch;
}
.page-hero .lead{
  color:var(--ink-2);
  font-size:16px;
  margin-top:16px;
  max-width:48ch;
}
.hero-banner{
  position:relative;
  margin-top:30px;
  height:220px;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:url(/assets/images/backpic/back-2.png) center/cover no-repeat;
}
.hero-banner::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(7,8,12,.9),rgba(7,8,12,.42) 70%,rgba(7,8,12,.3));
}
.hero-banner-inner{
  position:relative;
  z-index:2;
  height:100%;
  padding:26px 28px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:12px;
}
.hero-banner h2{
  font-size:clamp(19px,2.2vw,24px);
  font-weight:700;
  line-height:1.35;
  max-width:20ch;
}
.hero-banner p{color:var(--ink-2);font-size:14px;max-width:44ch}
@media (min-width:768px){
  .hero-banner{height:256px}
  .hero-banner-inner{padding:34px 38px}
}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border-radius:999px;
  font-size:12px;
  line-height:1.5;
  background:rgba(255,106,43,.12);
  color:var(--brand);
  border:1px solid rgba(255,106,43,.35);
  white-space:nowrap;
}
.badge i{font-size:11px}
.badge-cyan{
  background:rgba(43,227,192,.12);
  color:var(--brand2);
  border-color:rgba(43,227,192,.35);
}
.badge-plain{
  background:var(--surface);
  color:var(--ink-2);
  border-color:var(--line);
}

/* ---------- 栅格 ---------- */
.grid-8-4{display:grid;grid-template-columns:1fr;gap:24px}
@media (min-width:1024px){
  .grid-8-4{grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:28px;align-items:start}
}
.grid-6-6{display:grid;grid-template-columns:1fr;gap:28px;align-items:center}
@media (min-width:1024px){
  .grid-6-6{grid-template-columns:1fr 1fr;gap:44px}
}
.grid-3{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:640px){.grid-3{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.grid-3{grid-template-columns:repeat(3,1fr)}}

/* ---------- 卡片 ---------- */
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:var(--shadow-soft);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.card-hover:hover{
  transform:translateY(-2px);
  border-color:rgba(255,106,43,.4);
  box-shadow:0 16px 36px rgba(0,0,0,.48);
}
.card-title{
  font-size:18px;
  font-weight:600;
  line-height:1.5;
}
.card-text{color:var(--ink-2);font-size:14.5px;line-height:1.8;margin-top:10px}
.card-cover{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid var(--line);
  background:var(--surface);
}

/* ---------- 步骤 ---------- */
.steps{position:relative;display:flex;flex-direction:column;gap:20px}
.steps::before{
  content:"";
  position:absolute;
  left:20px;
  top:34px;
  bottom:34px;
  width:1px;
  background:linear-gradient(180deg,rgba(43,227,192,.65),rgba(43,227,192,.06));
}
.step{
  position:relative;
  margin-left:52px;
  padding:22px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-soft);
  transition:border-color .2s ease-out,transform .2s ease-out;
}
.step:hover{border-color:rgba(43,227,192,.4);transform:translateY(-2px)}
.step-num{
  position:absolute;
  left:-52px;
  top:20px;
  width:40px;
  height:40px;
  display:grid;
  place-items:center;
  border-radius:50%;
  background:rgba(43,227,192,.12);
  border:1px solid rgba(43,227,192,.42);
  color:var(--brand2);
  font-family:var(--num-font);
  font-weight:600;
  font-size:15px;
}
.step h3{font-size:17px;font-weight:600;line-height:1.5}
.step p{color:var(--ink-2);font-size:14.5px;line-height:1.85;margin-top:8px}
.step .tip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  margin-top:12px;
  font-size:12.5px;
  color:var(--ink-3);
}
.step .tip i{color:var(--warn)}
@media (max-width:520px){
  .steps::before{left:16px}
  .step{margin-left:44px;padding:18px}
  .step-num{left:-44px;width:34px;height:34px;font-size:13px}
}

/* ---------- 侧栏 ---------- */
.side-stack{display:flex;flex-direction:column;gap:20px}
.panel{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:20px;
  box-shadow:var(--shadow-soft);
}
.panel-title{
  font-size:15px;
  font-weight:600;
  display:flex;
  align-items:center;
  gap:9px;
  margin-bottom:14px;
}
.panel-title i{color:var(--brand)}
.spec-list li{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  padding:10px 0;
  border-bottom:1px dashed var(--line);
  font-size:14px;
}
.spec-list li:last-child{border-bottom:0;padding-bottom:0}
.spec-list span{color:var(--ink-3);flex:0 0 auto}
.spec-list b{font-weight:600;color:var(--ink);text-align:right}

.dl-group{display:flex;flex-direction:column;gap:12px}
.dl-btn{
  display:flex;
  align-items:center;
  gap:14px;
  min-height:64px;
  padding:12px 16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  transition:border-color .18s ease-out,transform .18s ease-out,background .18s ease-out;
}
.dl-btn:hover{border-color:var(--brand2);transform:translateY(-2px);background:#181C25}
.dl-btn i{font-size:20px;color:var(--brand2);flex:0 0 auto}
.dl-btn b{display:block;font-size:14.5px;font-weight:600}
.dl-btn em{
  display:block;
  font-style:normal;
  font-size:12px;
  color:var(--ink-3);
  font-family:var(--num-font);
  letter-spacing:.02em;
  margin-top:2px;
}

.mini-list{display:flex;flex-direction:column;gap:2px}
.mini-list a{
  display:block;
  padding:11px 0;
  border-bottom:1px solid rgba(35,39,51,.7);
  transition:color .18s ease-out;
}
.mini-list li:last-child a{border-bottom:0;padding-bottom:0}
.mini-list .mini-title{
  display:block;
  font-size:14.5px;
  line-height:1.6;
  color:var(--ink);
  transition:color .18s ease-out;
}
.mini-list a:hover .mini-title{color:var(--brand2)}
.mini-list .mini-meta{
  display:block;
  font-size:12px;
  color:var(--ink-3);
  font-family:var(--num-font);
  margin-top:4px;
}

/* ---------- 图文清单 ---------- */
.kv{border-top:1px solid var(--line)}
.kv-row{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:20px;
  padding:14px 0;
  border-bottom:1px solid var(--line);
}
.kv-row dt{
  flex:0 0 128px;
  color:var(--ink-3);
  font-size:14px;
}
.kv-row dd{
  flex:1 1 auto;
  font-size:14.5px;
  color:var(--ink);
  line-height:1.75;
}
@media (max-width:520px){
  .kv-row{flex-direction:column;gap:6px}
  .kv-row dt{flex:0 0 auto}
}

.figure-block{
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.figure-block img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
  transition:border-color .2s ease-out;
}
.faq-item:hover{border-color:#2E3444}
.faq-item.open{border-color:rgba(255,106,43,.4)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 20px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  line-height:1.6;
}
.faq-q i{
  color:var(--brand2);
  font-size:13px;
  transition:transform .2s ease-out;
  flex:0 0 auto;
}
.faq-item.open .faq-q i{transform:rotate(180deg)}
.faq-a{
  max-height:0;
  overflow:hidden;
  padding:0 20px;
  color:var(--ink-2);
  font-size:15px;
  line-height:1.85;
  transition:max-height .2s ease-out,padding .2s ease-out;
}
.faq-item.open .faq-a{max-height:340px;padding-bottom:20px}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:20px;
  border:1px solid var(--line);
  padding:30px 26px;
  background:
    radial-gradient(600px 200px at 12% 0%,rgba(255,106,43,.18),transparent 60%),
    linear-gradient(140deg,rgba(43,227,192,.08),rgba(23,26,34,.9)),
    var(--surface);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:20px;
  text-align:center;
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:clamp(21px,2.6vw,28px);font-weight:700;line-height:1.35}
.cta-band p{color:var(--ink-2);font-size:14.5px;max-width:56ch}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:12px}
@media (min-width:1024px){
  .cta-band{
    flex-direction:row;
    justify-content:space-between;
    text-align:left;
    padding:38px 42px;
  }
  .cta-band .cta-text{max-width:56ch}
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:24px;
  padding:52px 0 26px;
  background:var(--surface);
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:30px;
}
@media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
}
.footer-col p{color:var(--ink-2);font-size:14px;line-height:1.85;max-width:34ch}
.footer-col h4{
  font-size:14px;
  color:var(--brand);
  font-weight:600;
  margin-bottom:14px;
}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{
  color:var(--ink-2);
  font-size:14px;
  transition:color .18s ease-out,transform .18s ease-out;
  display:inline-block;
}
.footer-links a:hover{color:var(--brand2);transform:translateX(2px)}
.qr-mini{
  width:56px;
  height:56px;
  display:grid;
  place-items:center;
  border-radius:14px;
  background:#101219;
  border:1px solid var(--line);
  color:var(--brand2);
  font-size:22px;
  flex:0 0 auto;
}
.footer-bottom{
  margin-top:36px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  align-items:center;
  font-size:12.5px;
  color:var(--ink-3);
}
.footer-bottom a{color:var(--ink-3);transition:color .18s ease-out}
.footer-bottom a:hover{color:var(--brand2)}

/* ---------- 移动端导航 ---------- */
@media (max-width:1023px){
  .nav-chips{display:none}
  .nav-toggle{display:grid}
  .site-header.nav-open .nav-chips{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:12px;
    position:fixed;
    left:16px;
    right:16px;
    top:78px;
    padding:18px;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--shadow);
    z-index:90;
    max-height:calc(100vh - 120px);
    overflow-y:auto;
  }
  .site-header.nav-open .nav-chip{
    justify-content:flex-start;
    padding:14px 14px;
  }
}
@media (max-width:639px){
  .nav-actions .btn-sm{display:none}
}
@media (min-width:1024px){
  .nav-toggle{display:none}
}

/* roulang page: category3 */
:root{
  --bg:#0B0C11;
  --surface:#14161D;
  --card:#171A22;
  --line:#232733;
  --brand:#FF6A2B;
  --brand-deep:#E4531A;
  --brand2:#2BE3C0;
  --ink:#F4F6FA;
  --ink-2:#A7AEBD;
  --ink-3:#6F7787;
  --ok:#35C46A;
  --warn:#FFB020;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 12px 32px rgba(0,0,0,.45);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Oswald","DIN Alternate",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;border-radius:14px}
a{color:inherit;text-decoration:none;transition:color .18s ease-out}
button,input{font-family:inherit;font-size:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700}
p{margin:0}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:8px;
}
.num{font-family:var(--font-num);letter-spacing:.02em}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  padding:14px 0;
  background:linear-gradient(180deg,rgba(11,12,17,.96),rgba(11,12,17,.74));
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(35,39,51,.7);
}
.nav-panel{
  display:flex;align-items:center;gap:18px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:10px 14px;
  box-shadow:0 10px 30px rgba(0,0,0,.42),inset 0 1px 0 rgba(255,255,255,.04);
}
.nav-logo{display:inline-flex;align-items:center;gap:10px;flex:none;padding:4px 6px;border-radius:var(--radius-sm)}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#1A0C04;font-weight:800;font-size:18px;
}
.logo-text{font-weight:700;font-size:17px;letter-spacing:.01em;white-space:nowrap}
.nav-chips{display:none;flex:1;gap:8px;flex-wrap:wrap}
@media(min-width:1024px){.nav-chips{display:flex}}
.nav-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 14px;border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:rgba(255,255,255,.015);
  color:var(--ink-2);font-size:14px;
  transition:all .18s ease-out;
}
.nav-chip i{font-size:13px;color:var(--ink-3);transition:color .18s ease-out}
.nav-chip:hover{color:var(--ink);border-color:rgba(43,227,192,.45);background:rgba(43,227,192,.06);transform:translateY(-1px)}
.nav-chip:hover i{color:var(--brand2)}
.nav-chip.active{color:var(--ink);background:rgba(255,106,43,.12);border-color:rgba(255,106,43,.55)}
.nav-chip.active i{color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:var(--radius-sm);
  background:transparent;border:1px solid var(--line);color:var(--ink);
  cursor:pointer;transition:all .18s ease-out;
}
.nav-toggle:hover{border-color:var(--brand2);color:var(--brand2)}
@media(min-width:1024px){.nav-toggle{display:none}}
.nav-drawer{
  display:none;grid-template-columns:1fr 1fr;gap:10px;
  margin-top:12px;padding:14px;
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.nav-drawer.is-open{display:grid}
.nav-drawer .nav-chip{justify-content:center;font-size:13.5px;padding:12px 10px}
@media(min-width:1024px){.nav-drawer{display:none!important}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-weight:600;font-size:15px;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:all .18s ease-out;white-space:nowrap;
}
.btn-sm{height:42px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--brand);color:#1A0C04}
.btn-primary:hover{filter:brightness(1.08)}
.btn-primary:active{background:var(--brand-deep);transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand2);color:var(--brand2)}
.btn-ghost:active{transform:translateY(1px)}
.btn-group{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- breadcrumb / badges ---------- */
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--ink-3);padding-top:22px;flex-wrap:wrap}
.breadcrumb .sep{color:var(--line)}
.breadcrumb a:hover{color:var(--brand2)}
.breadcrumb .current{color:var(--brand)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  font-size:12.5px;font-weight:600;line-height:1.4;
}
.badge-brand{background:rgba(255,106,43,.12);color:#FFB08A;border:1px solid rgba(255,106,43,.4)}
.badge-cyan{background:rgba(43,227,192,.12);color:var(--brand2);border:1px solid rgba(43,227,192,.36)}
.badge-plain{background:rgba(255,255,255,.04);color:var(--ink-2);border:1px solid var(--line)}

/* ---------- sections ---------- */
.section{padding:56px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.section--tight{padding:44px 0}
@media(min-width:1024px){.section--tight{padding:72px 0}}
.section-head{max-width:720px;margin-bottom:32px}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:-.01em}
.section-head p{margin-top:12px;color:var(--ink-2);font-size:16px}
.section-head .line{width:44px;height:3px;background:var(--brand);border-radius:999px;margin-bottom:16px}

/* ---------- hero ---------- */
.hero-head{padding-top:26px;max-width:820px}
.hero-head h1{
  font-size:clamp(30px,4.6vw,56px);
  line-height:1.12;font-weight:800;letter-spacing:-.02em;
  margin-top:16px;
}
.hero-sub{margin-top:14px;color:var(--ink-2);font-size:clamp(15px,1.6vw,18px);max-width:44ch}
.banner{
  position:relative;margin-top:28px;
  min-height:200px;border-radius:var(--radius);
  border:1px solid var(--line);
  background-image:linear-gradient(rgba(11,12,17,.34),rgba(11,12,17,.34)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  display:flex;align-items:flex-end;overflow:hidden;
  box-shadow:var(--shadow);
}
@media(min-width:768px){.banner{min-height:260px}}
.banner-inner{
  width:100%;padding:24px;
  background:linear-gradient(0deg,rgba(11,12,17,.88) 10%,rgba(11,12,17,0) 100%);
}
.banner-inner .banner-title{font-size:20px;font-weight:700}
.banner-inner .banner-meta{
  margin-top:6px;font-size:13px;color:var(--brand2);
  font-family:var(--font-num);letter-spacing:.04em;
}

/* ---------- duo blocks 6/6 ---------- */
.duo{
  display:grid;grid-template-columns:1fr;gap:22px;align-items:center;
  padding:28px 0;border-bottom:1px solid rgba(35,39,51,.7);
}
.duo:last-child{border-bottom:0}
.duo-media{order:-1}
@media(min-width:1024px){
  .duo{grid-template-columns:1fr 1fr;gap:56px;padding:36px 0}
  .duo-media{order:0}
  .duo--reverse .duo-media{order:-1}
}
.duo-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:14px;border:1px solid var(--line);
  box-shadow:var(--shadow);
  transition:transform .2s ease-out,border-color .2s ease-out;
}
.duo-media img:hover{transform:translateY(-2px);border-color:rgba(255,106,43,.4)}
.duo-text h3{font-size:clamp(20px,2.2vw,24px);margin-top:16px;font-weight:700}
.duo-text p{margin-top:12px;color:var(--ink-2);font-size:15.5px}
.tick-list{margin-top:16px;display:grid;gap:10px}
.tick-list li{position:relative;padding-left:20px;font-size:14.5px;color:var(--ink-2)}
.tick-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:8px;height:8px;border-radius:3px;background:var(--brand);
}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:18px;color:var(--brand2);font-size:14.5px;font-weight:600;
}
.link-arrow i{font-size:12px;transition:transform .18s ease-out}
.link-arrow:hover i{transform:translateX(4px)}

/* ---------- spec list (dl) ---------- */
.spec-card{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);
}
.spec-row{
  display:grid;grid-template-columns:1fr;gap:4px;
  padding:16px 22px;border-bottom:1px solid var(--line);
}
.spec-row:last-child{border-bottom:0}
@media(min-width:640px){.spec-row{grid-template-columns:170px 1fr;gap:20px;align-items:baseline}}
.spec-row dt{color:var(--ink-3);font-size:13px;margin:0}
.spec-row dd{margin:0;color:var(--ink);font-size:15px}
.spec-row dd .hl{color:var(--brand2);font-family:var(--font-num)}

/* ---------- faq ---------- */
.faq{max-width:720px;margin:0 auto;display:grid;gap:12px}
.faq-item{
  background:var(--card);border:1px solid var(--line);
  border-radius:14px;overflow:hidden;
  transition:border-color .18s ease-out;
}
.faq-item:hover{border-color:rgba(43,227,192,.35)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:16px;font-weight:600;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary i{color:var(--brand);font-size:13px;transition:transform .2s ease-out}
.faq-item[open] summary i{transform:rotate(180deg)}
.faq-body{padding:0 20px 18px;color:var(--ink-2);font-size:15px;line-height:1.85}

/* ---------- cta ---------- */
.cta-bar{
  background:linear-gradient(135deg,rgba(255,106,43,.14),rgba(43,227,192,.08)),var(--card);
  border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;text-align:center;box-shadow:var(--shadow);
}
.cta-bar h2{font-size:clamp(22px,2.6vw,30px);font-weight:700}
.cta-bar p{margin-top:12px;color:var(--ink-2);font-size:15.5px;max-width:60ch;margin-left:auto;margin-right:auto}
.cta-bar .btn-group{justify-content:center;margin-top:24px}

/* ---------- footer ---------- */
.site-footer{
  margin-top:24px;padding:56px 0 24px;
  background:var(--surface);border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:28px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer-col h4{font-size:14px;color:var(--brand);font-weight:600;margin-bottom:12px}
.footer-col p{color:var(--ink-3);font-size:13.5px;line-height:1.8}
.footer-links{display:grid;gap:8px}
.footer-links a{color:var(--ink-2);font-size:14px}
.footer-links a:hover{color:var(--brand2)}
.qr-mini{
  width:64px;height:64px;flex:none;border-radius:14px;
  border:1px solid var(--line);background:var(--card);
  display:grid;place-items:center;color:var(--brand2);font-size:22px;
}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  border-top:1px solid var(--line);margin-top:36px;padding-top:20px;
  font-size:12.5px;color:var(--ink-3);
}
.footer-bottom a{color:var(--ink-3)}
.footer-bottom a:hover{color:var(--brand2)}

/* roulang page: category2 */
:root{
  --bg:#0B0C11;
  --surface:#14161D;
  --card:#171A22;
  --line:#232733;
  --brand:#FF6A2B;
  --brand-deep:#E4531A;
  --brand2:#2BE3C0;
  --ink:#F4F6FA;
  --ink-2:#A7AEBD;
  --ink-3:#6F7787;
  --ok:#35C46A;
  --warn:#FFB020;
  --r-lg:18px;
  --r-md:12px;
  --r-img:14px;
  --shadow-card:0 12px 32px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sec:56px;
}
@media (min-width:1024px){:root{--sec:96px}}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0;font-weight:inherit}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.num{font-family:ui-monospace,"DIN Alternate","Oswald",SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums;letter-spacing:.02em}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ===== 顶部导航卡片面板 ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  padding:12px 0;
  background:linear-gradient(180deg,rgba(11,12,17,.95),rgba(11,12,17,.66));
  backdrop-filter:blur(12px);
}
.nav-panel{
  display:flex;
  align-items:center;
  gap:14px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:10px 14px;
  box-shadow:0 12px 32px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.04);
}
.nav-logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  color:#1A0D05;font-weight:800;font-size:19px;
  display:grid;place-items:center;
  box-shadow:0 6px 16px rgba(255,106,43,.28);
}
.logo-text{font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.nav-chips{display:none;gap:8px;margin-left:6px}
@media (min-width:1024px){.nav-chips{display:flex}}
.nav-chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;border-radius:var(--r-md);
  border:1px solid var(--line);color:var(--ink-2);
  font-size:14px;background:transparent;white-space:nowrap;
}
.nav-chip i{color:var(--ink-3);font-size:14px;transition:color .18s var(--ease)}
.nav-chip:hover{background:var(--surface);color:var(--ink);border-color:#2E3546}
.nav-chip:hover i{color:var(--brand)}
.nav-chip.active{background:rgba(255,106,43,.12);border-color:rgba(255,106,43,.55);color:var(--ink)}
.nav-chip.active i{color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--r-md);
  border:1px solid var(--line);color:var(--ink-2);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--brand2);color:var(--brand2)}
@media (min-width:1024px){.nav-toggle{display:none}}

.nav-drawer{
  position:fixed;inset:0;z-index:70;
  background:var(--bg);
  display:flex;flex-direction:column;gap:18px;
  padding:20px;
  transform:translateY(-102%);
  visibility:hidden;
  transition:transform .24s var(--ease),visibility .24s;
}
.nav-drawer.open{transform:translateY(0);visibility:visible}
@media (min-width:1024px){.nav-drawer{display:none}}
.nav-drawer-top{display:flex;align-items:center;justify-content:space-between}
.nav-drawer-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.nav-drawer-grid .nav-chip{
  flex-direction:column;align-items:flex-start;gap:10px;
  padding:16px 14px;font-size:15px;height:100%;white-space:normal;
}
.nav-drawer-grid .nav-chip i{font-size:18px}
.nav-drawer-cta{margin-top:auto;width:100%;height:52px}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-md);font-weight:600;font-size:15px;
  height:48px;padding:0 24px;
  transition:transform .16s var(--ease),background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--brand);color:#1A0D05;box-shadow:0 8px 22px rgba(255,106,43,.25)}
.btn-primary:hover{background:#FF7C42;transform:translateY(-1px)}
.btn-primary:active{background:var(--brand-deep);transform:translateY(1px);box-shadow:none}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand2);color:var(--brand2)}
.btn-ghost:active{transform:translateY(1px)}
.link-more{display:inline-flex;align-items:center;gap:6px;color:var(--brand2);font-size:14px;font-weight:600}
.link-more:hover{color:#7CF2DE}

/* ===== 通用排版 ===== */
.section{padding-top:var(--sec)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px;flex-wrap:wrap}
.sec-title{
  font-size:clamp(22px,2.6vw,30px);font-weight:700;letter-spacing:-.01em;
  display:flex;align-items:center;gap:12px;line-height:1.3;
}
.sec-title::before{content:"";width:4px;height:22px;border-radius:2px;background:var(--brand);display:inline-block;flex-shrink:0}
.sec-desc{color:var(--ink-2);font-size:15px;margin-top:12px;max-width:64ch}

/* ===== 面包屑 ===== */
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:12px;color:var(--ink-3);padding-top:26px}
.crumb a:hover{color:var(--brand2)}
.crumb .sep{color:#313748}
.crumb .current{color:var(--brand)}

/* ===== Hero ===== */
.hero-banner{
  position:relative;margin-top:16px;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);
  background-color:#0E1015;background-size:cover;background-position:center;
  box-shadow:var(--shadow-card);
}
.hero-banner::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(11,12,17,.94) 6%,rgba(11,12,17,.72) 52%,rgba(11,12,17,.42) 100%);
}
.hero-inner{position:relative;padding:32px 22px;display:grid;gap:26px}
@media (min-width:1024px){
  .hero-inner{padding:48px 40px;grid-template-columns:1.55fr .85fr;align-items:center;gap:40px}
}
.page-title{
  font-size:clamp(28px,4.4vw,46px);line-height:1.14;font-weight:800;letter-spacing:-.02em;
  max-width:20ch;
}
.page-sub{margin-top:14px;color:var(--ink-2);font-size:16px;line-height:1.75;max-width:30ch}
.version-card{
  background:rgba(23,26,34,.9);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px 22px;backdrop-filter:blur(6px);
}
.version-card .vc-label{font-size:12px;color:var(--ink-3);letter-spacing:.04em}
.version-card .vc-num{font-size:32px;font-weight:800;color:var(--brand2);line-height:1.2;margin-top:6px}
.version-card .vc-row{display:flex;justify-content:space-between;gap:12px;font-size:13px;color:var(--ink-2);padding:9px 0;border-bottom:1px solid var(--line)}
.version-card .vc-row:last-child{border-bottom:0;padding-bottom:0}
.version-card .vc-row span:first-child{color:var(--ink-3)}

/* ===== 数据条 ===== */
.stat-row{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:22px}
@media (min-width:768px){.stat-row{grid-template-columns:repeat(4,1fr);gap:18px}}
.stat-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:18px 20px;transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.stat-card:hover{transform:translateY(-2px);border-color:rgba(255,106,43,.45);box-shadow:var(--shadow-card)}
.stat-card .sv{font-size:25px;font-weight:800;color:var(--brand2);line-height:1.2}
.stat-card .sl{font-size:13px;color:var(--ink-3);margin-top:6px}

/* ===== 徽章 ===== */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;font-size:12px;line-height:1.6;
  border:1px solid transparent;white-space:nowrap;
}
.badge-brand{background:rgba(255,106,43,.12);border-color:rgba(255,106,43,.4);color:#FFB48C}
.badge-cyan{background:rgba(43,227,192,.12);border-color:rgba(43,227,192,.4);color:#8CF3E1}
.badge-grey{background:rgba(167,174,189,.1);border-color:var(--line);color:var(--ink-2)}

/* ===== 时间线 ===== */
.timeline{position:relative;margin-top:6px}
.timeline::before{
  content:"";position:absolute;top:8px;bottom:24px;left:19px;width:2px;
  background:linear-gradient(180deg,rgba(255,106,43,.75),rgba(43,227,192,.4) 55%,rgba(35,39,51,.35));
}
.tl-item{position:relative;padding-left:52px;margin-bottom:20px}
.tl-dot{
  position:absolute;left:12px;top:26px;width:16px;height:16px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 4px rgba(255,106,43,.16);
}
.tl-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px 22px;box-shadow:0 12px 32px rgba(0,0,0,.4);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.tl-card:hover{transform:translateY(-2px);border-color:rgba(255,106,43,.5);box-shadow:0 16px 36px rgba(0,0,0,.5)}
.tl-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.tl-ver{font-size:19px;font-weight:800;color:var(--ink);letter-spacing:-.01em}
.tl-date{font-size:12px;color:var(--ink-3)}
.tl-topic{margin-top:12px;font-size:16px;font-weight:600;color:var(--ink)}
.tl-list{margin-top:12px;display:grid;gap:9px}
.tl-list li{position:relative;padding-left:17px;font-size:14.5px;color:var(--ink-2);line-height:1.75}
.tl-list li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:2px;background:var(--brand2);opacity:.9}
.tl-figure{margin-top:14px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line)}
.tl-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
@media (min-width:1024px){
  .tl-item{width:calc(50% - 40px);padding-left:0;margin-bottom:26px}
  .tl-item:nth-child(even){margin-left:auto}
  .tl-dot{left:calc(100% + 32px);top:24px}
  .tl-item:nth-child(even) .tl-dot{left:-48px}
}

/* ===== 信息三卡 ===== */
.tri-grid{display:grid;gap:20px}
@media (min-width:768px){.tri-grid{grid-template-columns:repeat(3,1fr);gap:22px}}
.info-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.info-card:hover{transform:translateY(-2px);border-color:rgba(43,227,192,.45);box-shadow:var(--shadow-card)}
.info-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:rgba(43,227,192,.1);border:1px solid rgba(43,227,192,.28);
  color:var(--brand2);font-size:18px;margin-bottom:16px;
}
.info-card h3{font-size:18px;font-weight:600;color:var(--ink)}
.info-card p{margin-top:10px;font-size:14.5px;color:var(--ink-2);line-height:1.85}

/* ===== FAQ ===== */
.faq-wrap{max-width:720px;margin:0 auto}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-lg);background:var(--card);
  margin-bottom:12px;overflow:hidden;
  transition:border-color .2s var(--ease);
}
.faq-item summary{
  list-style:none;cursor:pointer;padding:17px 20px;
  font-size:16px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .fa-chevron{color:var(--brand);font-size:13px;transition:transform .2s var(--ease);flex-shrink:0}
.faq-item[open] summary .fa-chevron{transform:rotate(180deg)}
.faq-item[open]{border-color:rgba(255,106,43,.35)}
.faq-answer{padding:0 20px 20px;color:var(--ink-2);font-size:15px;line-height:1.85}

/* ===== 底部下载 CTA ===== */
.cta-panel{
  background:linear-gradient(120deg,rgba(255,106,43,.16),rgba(43,227,192,.08)),var(--card);
  border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 22px;display:grid;gap:26px;
  box-shadow:var(--shadow-card);
}
@media (min-width:1024px){.cta-panel{grid-template-columns:1fr 1.05fr;padding:38px 36px;align-items:center;gap:40px}}
.cta-panel h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;letter-spacing:-.01em;line-height:1.3}
.cta-panel .cta-note{margin-top:12px;color:var(--ink-2);font-size:15px;max-width:36ch}
.qr-row{display:flex;align-items:center;gap:16px;margin-top:22px}
.qr-box{
  width:104px;height:104px;border-radius:var(--r-lg);flex-shrink:0;
  border:1px dashed var(--line);background:var(--surface);
  display:grid;place-items:center;color:var(--ink-3);font-size:30px;
}
.qr-row .qr-text{font-size:13px;color:var(--ink-3);line-height:1.9}
.platform-grid{display:grid;grid-template-columns:1fr;gap:12px}
@media (min-width:640px){.platform-grid{grid-template-columns:repeat(2,1fr)}}
.platform-btn{
  display:flex;align-items:center;gap:12px;height:64px;padding:0 16px;
  border-radius:var(--r-md);border:1px solid var(--line);background:var(--surface);
  text-align:left;
  transition:transform .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.platform-btn i{font-size:19px;color:var(--brand);width:22px;text-align:center}
.platform-btn .pb-name{font-size:15px;font-weight:600;color:var(--ink);line-height:1.4}
.platform-btn .pb-spec{font-size:12px;color:var(--ink-3);line-height:1.5}
.platform-btn:hover{border-color:var(--brand2);background:#1B1F29;transform:translateY(-2px)}
.platform-btn:active{transform:translateY(0)}

/* ===== 页脚 ===== */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:var(--sec);border-top:1px solid var(--line);
  background:var(--surface);padding:48px 0 20px;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.035) 0 1px,transparent 1px 10px);
}
.site-footer .container{position:relative;z-index:1}
.footer-grid{display:grid;gap:28px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.25fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .logo-mark{width:34px;height:34px;border-radius:10px;font-size:17px}
.footer-brand .logo-text{font-size:16px}
.footer-col h4{font-size:14px;color:var(--brand);margin-bottom:14px;font-weight:600}
.footer-col p{font-size:13px;color:var(--ink-2);line-height:1.85}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:13.5px;color:var(--ink-2)}
.footer-links a:hover{color:var(--brand2)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
  margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--ink-3);
}
.footer-bottom a:hover{color:var(--brand2)}
.qr-mini{
  width:56px;height:56px;border-radius:14px;border:1px solid var(--line);
  background:var(--card);display:grid;place-items:center;color:var(--ink-3);font-size:20px;
}