/* roulang page: index */
:root{
  --ink-900:#0A0B0D;
  --ink-800:#101216;
  --ink-700:#171A20;
  --ink-600:#1F232B;
  --line:#262A33;
  --line-strong:#333844;
  --text-1:#F0EDE7;
  --text-2:#A6A19A;
  --text-3:#6C6862;
  --brand:#FF6A1F;
  --brand-2:#2FD3B5;
  --paper:#F5F1E9;
  --paper-ink:#1A1B1F;
  --ok:#3FBF7F;
  --warn:#E4B33C;
  --err:#E5533D;
  --empty:#2A2E36;
  --r-card:14px;
  --r-img:12px;
  --r-btn:999px;
  --r-square:10px;
  --r-paper:18px;
  --container:1280px;
  --pad-x:32px;
  --shadow-hover:0 12px 30px rgba(255,106,31,.12);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",sans-serif;
  --font-num:"Archivo","Inter","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--pad-x);}
.section{padding:112px 0;border-top:1px solid var(--line);}
.section:first-of-type{border-top:0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-head .title-wrap{max-width:760px;}
.sec-no{font-family:var(--font-num);font-size:13px;letter-spacing:.08em;color:var(--text-3);margin-right:12px;vertical-align:middle;}
h2.sec-title{display:inline;font-size:clamp(24px,3vw,38px);line-height:1.2;letter-spacing:-.01em;}
.sec-sub{margin-top:12px;font-size:15px;color:var(--text-3);}
.more-link{font-size:14px;color:var(--text-2);display:inline-flex;align-items:center;gap:8px;white-space:nowrap;transition:color .22s ease;}
.more-link span.arrow{transition:transform .22s ease;}
.more-link:hover{color:var(--text-1);}
.more-link:hover span.arrow{transform:translateX(4px);}
.eyebrow{display:flex;align-items:center;gap:12px;font-size:13px;letter-spacing:.08em;color:var(--text-2);}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--brand-2);display:block;}

/* ============ header ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:transparent;
  transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(10,11,13,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px;}
.brand{display:flex;align-items:center;gap:8px;}
.brand-mark{font-family:var(--font-num);font-weight:900;font-size:24px;letter-spacing:-.02em;color:var(--text-1);}
.brand-divider{width:1px;height:20px;background:var(--line-strong);display:block;}
.brand-sub{font-size:13px;color:var(--text-2);letter-spacing:.02em;}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  position:relative;display:inline-block;padding:10px 12px;font-size:16px;color:var(--text-2);
  transition:color .22s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-links a:hover{color:var(--text-1);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--text-1);}
.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active::before{
  content:"";position:absolute;left:50%;bottom:-0px;width:4px;height:4px;border-radius:50%;
  background:var(--brand);transform:translateX(-50%);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand);color:#14100C;font-weight:600;font-size:15px;
  padding:11px 22px;border-radius:var(--r-btn);border:1px solid var(--brand);
  transition:background .24s ease,color .24s ease,border-color .24s ease,transform .18s ease;
}
.nav-cta:hover{background:var(--ink-900);color:var(--brand);border-color:var(--brand);}
.nav-cta:active{transform:scale(.98);}
.nav-right{display:flex;align-items:center;gap:16px;}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-square);position:relative;}
.burger span{position:absolute;left:12px;right:12px;height:1.5px;background:var(--text-1);transition:transform .25s ease,opacity .25s ease;}
.burger span:nth-child(1){top:16px;}
.burger span:nth-child(2){top:21px;}
.burger span:nth-child(3){top:26px;}
.burger.is-open span:nth-child(1){transform:translateY(5px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-5px) rotate(-45deg);}

/* ============ hero ============ */
.hero{
  position:relative;min-height:88vh;display:flex;align-items:flex-end;
  padding:180px 0 96px;overflow:hidden;
}
.hero-bg{position:absolute;inset:0;z-index:0;}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.62;}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(10,11,13,.96) 0%,rgba(10,11,13,.72) 42%,rgba(10,11,13,.25) 100%),
    linear-gradient(180deg,rgba(10,11,13,.72) 0%,rgba(10,11,13,.34) 40%,var(--ink-900) 96%),
    radial-gradient(circle at 70% 30%,rgba(0,0,0,0) 40%,rgba(0,0,0,.8) 100%);
}
.hero-inner{position:relative;z-index:2;max-width:760px;}
.hero h1{
  margin:22px 0 0;font-size:clamp(38px,5.6vw,76px);font-weight:800;line-height:1.04;letter-spacing:-.02em;
}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.75;color:var(--text-2);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;padding:14px 30px;border-radius:var(--r-btn);
  transition:background .24s ease,color .24s ease,border-color .24s ease,transform .18s ease;
}
.btn-primary{background:var(--brand);color:#14100C;border:1px solid var(--brand);}
.btn-primary:hover{background:transparent;color:var(--brand);}
.btn-ghost{background:transparent;color:var(--text-1);border:1px solid var(--text-1);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-square{border-radius:var(--r-square);}
.btn:active{transform:scale(.98);}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;}
.hero-tags{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:38px;font-size:13px;letter-spacing:.06em;color:var(--text-3);}
.hero-tags span{display:inline-flex;align-items:center;gap:14px;}
.hero-tags span::after{content:"";width:1px;height:12px;background:var(--line-strong);display:inline-block;}
.hero-tags span:last-child::after{display:none;}
.scroll-cue{
  position:absolute;left:50%;bottom:28px;transform:translateX(-50%);z-index:3;
  display:flex;flex-direction:column;align-items:center;gap:10px;font-size:12px;letter-spacing:.14em;color:var(--text-3);
}
.scroll-cue i{display:block;width:1px;height:44px;background:linear-gradient(180deg,var(--line-strong),var(--brand));animation:cueMove 2.4s ease-in-out infinite;}
@keyframes cueMove{0%,100%{opacity:.35;transform:translateY(-6px);}50%{opacity:1;transform:translateY(6px);}}

/* ============ rail ============ */
.rail-wrap{position:relative;}
.rail{
  display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:8px;scrollbar-width:none;
  -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 48px,#000 calc(100% - 48px),transparent 100%);
  mask-image:linear-gradient(90deg,transparent 0,#000 48px,#000 calc(100% - 48px),transparent 100%);
}
.rail::-webkit-scrollbar{display:none;}
.card-poster{
  flex:0 0 232px;width:232px;scroll-snap-align:start;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:transform .4s cubic-bezier(.2,.7,.2,1),border-color .3s ease,box-shadow .3s ease;
}
.card-poster:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:var(--shadow-hover);}
.poster-media{position:relative;aspect-ratio:2/3;overflow:hidden;background:var(--ink-600);}
.poster-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s cubic-bezier(.2,.7,.2,1);}
.card-poster:hover .poster-media img{transform:scale(1.04);}
.poster-media::after{
  content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(10,11,13,.85) 100%);
  opacity:0;transition:opacity .3s ease;
}
.card-poster:hover .poster-media::after{opacity:1;}
.badge{
  position:absolute;top:10px;left:10px;z-index:2;font-size:12px;letter-spacing:.04em;
  padding:4px 10px;border-radius:var(--r-btn);border:1px solid var(--brand-2);color:var(--brand-2);
  background:rgba(10,11,13,.55);backdrop-filter:blur(4px);
}
.badge-solid{background:var(--brand);color:#14100C;border-color:var(--brand);}
.card-body{padding:14px 14px 16px;}
.card-body h3{font-size:18px;font-weight:600;line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:color .24s ease;}
.card-poster:hover .card-body h3{color:var(--brand);}
.card-meta{margin-top:6px;font-size:13px;color:var(--text-3);}
.rail-btn{
  position:absolute;top:38%;width:40px;height:40px;border-radius:50%;border:1px solid var(--line-strong);
  background:rgba(10,11,13,.78);color:var(--text-1);display:flex;align-items:center;justify-content:center;
  z-index:5;opacity:0;transition:opacity .25s ease,border-color .25s ease,color .25s ease;
}
.rail-wrap:hover .rail-btn{opacity:1;}
.rail-btn:hover{border-color:var(--brand);color:var(--brand);}
.rail-btn.prev{left:-8px;}
.rail-btn.next{right:-8px;}

/* ============ ranking ============ */
.rank-layout{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:start;}
.rank-list{border-top:1px solid var(--line);}
.rank-row{
  display:grid;grid-template-columns:56px 80px 1fr auto;gap:18px;align-items:center;
  padding:18px 8px;border-bottom:1px solid var(--line);transition:background .25s ease;
}
.rank-row:hover{background:var(--ink-800);}
.rank-no{font-family:var(--font-num);font-size:34px;font-weight:900;letter-spacing:-.03em;color:var(--text-3);transition:color .25s ease;}
.rank-row:hover .rank-no{color:var(--brand);}
.rank-thumb{width:80px;height:112px;border-radius:var(--r-img);overflow:hidden;background:var(--ink-600);}
.rank-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s cubic-bezier(.2,.7,.2,1);}
.rank-row:hover .rank-thumb img{transform:scale(1.06);}
.rank-main h3{font-size:18px;font-weight:600;line-height:1.4;transition:color .24s ease;}
.rank-row:hover .rank-main h3{color:var(--brand);}
.rank-main p{margin-top:4px;font-size:13px;color:var(--text-3);}
.rank-date{font-size:13px;color:var(--text-3);font-family:var(--font-num);white-space:nowrap;}
.rank-feature{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);background:var(--ink-700);}
.rank-feature img{width:100%;aspect-ratio:3/4;object-fit:cover;}
.rank-feature .feature-text{position:absolute;left:0;right:0;bottom:0;padding:24px;background:linear-gradient(180deg,transparent,rgba(10,11,13,.94));}
.rank-feature h3{font-size:20px;margin-top:10px;}
.rank-feature p{margin-top:8px;font-size:13px;color:var(--text-2);}

/* ============ grid A ============ */
.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px;}
.chip{
  font-size:14px;padding:8px 18px;border-radius:var(--r-btn);border:1px solid var(--line-strong);
  color:var(--text-2);transition:color .22s ease,border-color .22s ease,background .22s ease;
}
.chip:hover{color:var(--text-1);border-color:var(--text-2);}
.chip.active{color:var(--text-1);border-color:var(--brand);background:rgba(255,106,31,.08);}
.grid-posters{display:grid;grid-template-columns:repeat(5,1fr);gap:24px;}
.grid-posters .card-poster{flex:none;width:auto;}

/* ============ mix grid ============ */
.mix-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.cat-card{
  position:relative;display:block;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  background:var(--ink-700);transition:transform .32s ease,border-color .3s ease,box-shadow .3s ease;
}
.cat-card:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:var(--shadow-hover);}
.cat-media{position:relative;aspect-ratio:16/10;overflow:hidden;}
.cat-media img{width:100%;height:100%;object-fit:cover;opacity:.72;transition:transform .4s cubic-bezier(.2,.7,.2,1),opacity .3s ease;}
.cat-card:hover .cat-media img{transform:scale(1.04);opacity:.9;}
.cat-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,11,13,.15),rgba(10,11,13,.92));}
.cat-text{position:absolute;left:0;right:0;bottom:0;padding:24px;z-index:2;}
.cat-text h3{font-size:20px;font-weight:600;}
.cat-text p{margin-top:8px;font-size:14px;color:var(--text-2);max-width:520px;}
.cat-span-7{grid-column:span 7;}
.cat-span-5{grid-column:span 5;}
.cat-span-4{grid-column:span 4;}
.cat-span-8{grid-column:span 8;}
.mix-offset{margin-top:48px;}

/* ============ news list ============ */
.news-list{border-top:1px solid var(--line);}
.news-row{
  display:grid;grid-template-columns:96px 1fr 120px 40px;gap:24px;align-items:center;
  padding:22px 12px;border-bottom:1px solid var(--line);transition:background .25s ease;
}
.news-row:hover{background:var(--ink-800);}
.news-date{font-family:var(--font-num);color:var(--text-3);line-height:1.1;}
.news-date b{display:block;font-size:28px;font-weight:900;color:var(--text-1);letter-spacing:-.02em;}
.news-date small{font-size:12px;letter-spacing:.06em;}
.news-main h3{font-size:18px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:color .24s ease;}
.news-row:hover .news-main h3{color:var(--brand);}
.news-main p{margin-top:6px;font-size:14px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-tag{font-size:12px;letter-spacing:.04em;color:var(--brand-2);border:1px solid var(--line-strong);border-radius:var(--r-btn);padding:4px 12px;justify-self:start;white-space:nowrap;}
.news-arrow{justify-self:end;color:var(--text-3);transition:transform .25s ease,color .25s ease;}
.news-row:hover .news-arrow{transform:translateX(5px);color:var(--brand);}
.empty-state{
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--empty);
  padding:64px 32px;text-align:center;color:var(--text-2);
}
.empty-state .empty-icon{width:46px;height:46px;margin:0 auto 18px;border:1px solid var(--line-strong);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--text-3);}
.empty-state p{margin-top:8px;font-size:14px;color:var(--text-3);}
.empty-state .btn{margin-top:24px;}

/* ============ stats ============ */
.stats-band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat-item{padding:48px 32px;border-left:1px solid var(--line);}
.stat-item:first-child{border-left:0;}
.stat-num{font-family:var(--font-num);font-size:clamp(34px,4vw,52px);font-weight:900;letter-spacing:-.03em;color:var(--text-1);line-height:1;}
.stat-num em{font-style:normal;color:var(--brand);}
.stat-item h3{font-size:16px;font-weight:600;margin-top:14px;}
.stat-item p{margin-top:6px;font-size:14px;color:var(--text-3);}

/* ============ faq ============ */
.faq-layout{display:grid;grid-template-columns:5fr 7fr;gap:64px;align-items:start;}
.faq-intro p{margin-top:18px;font-size:15px;color:var(--text-2);max-width:400px;}
.faq-intro .btn{margin-top:28px;}
.acc-item{border-top:1px solid var(--line);}
.acc-item:last-child{border-bottom:1px solid var(--line);}
.acc-head{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:22px 4px 22px 16px;text-align:left;position:relative;transition:color .24s ease;
}
.acc-head::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:2px;background:var(--brand);opacity:0;transition:opacity .25s ease;}
.acc-item.is-open .acc-head::before{opacity:1;}
.acc-head h3{font-size:17px;font-weight:600;color:var(--text-2);transition:color .24s ease;}
.acc-head:hover h3{color:var(--text-1);}
.acc-item.is-open .acc-head h3{color:var(--text-1);}
.acc-icon{position:relative;width:16px;height:16px;flex:0 0 16px;}
.acc-icon::before,.acc-icon::after{content:"";position:absolute;background:var(--brand-2);transition:transform .25s ease,opacity .25s ease;}
.acc-icon::before{left:0;right:0;top:7.5px;height:1.5px;}
.acc-icon::after{top:0;bottom:0;left:7.5px;width:1.5px;}
.acc-item.is-open .acc-icon::after{transform:scaleY(0);opacity:0;}
.acc-panel{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.acc-panel p{padding:0 4px 24px 16px;font-size:15px;line-height:1.8;color:var(--text-2);max-width:620px;}

/* ============ cta ============ */
.cta-band{position:relative;overflow:hidden;background:var(--ink-800);padding:120px 0;border-top:1px solid var(--line);}
.cta-band .cta-bg{position:absolute;inset:0;opacity:.16;}
.cta-band .cta-bg img{width:100%;height:100%;object-fit:cover;}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(38,42,51,.55) 1px,transparent 1px),linear-gradient(90deg,rgba(38,42,51,.55) 1px,transparent 1px);
  background-size:64px 64px;opacity:.28;
}
.cta-inner{position:relative;z-index:2;max-width:640px;}
.cta-inner h2{font-size:clamp(26px,3.4vw,42px);line-height:1.18;letter-spacing:-.01em;}
.cta-inner p{margin-top:18px;font-size:16px;color:var(--text-2);}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:22px;margin-top:34px;}

/* ============ footer ============ */
.site-footer{border-top:1px solid var(--line);background:var(--ink-900);padding:80px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:300px;}
.footer-col h3{font-size:13px;letter-spacing:.08em;color:var(--text-3);font-weight:600;margin-bottom:18px;}
.footer-col li{margin-bottom:12px;}
.footer-link{font-size:14px;color:var(--text-2);position:relative;display:inline-block;transition:color .22s ease;}
.footer-link::after{content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;}
.footer-link:hover{color:var(--text-1);}
.footer-link:hover::after{transform:scaleX(1);}
.footer-bottom{
  margin-top:64px;border-top:1px solid var(--line);padding:24px 0;
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--text-2);}

/* ============ reveal ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease;}
.reveal.is-in{opacity:1;transform:none;}

/* ============ responsive ============ */
@media (max-width:1024px){
  :root{--pad-x:24px;}
  .section{padding:80px 0;}
  .nav-links{display:none;}
  .burger{display:block;}
  .nav-links.is-open{
    display:flex;flex-direction:column;align-items:flex-start;gap:0;
    position:fixed;top:0;right:0;width:88%;max-width:360px;height:100vh;
    background:var(--ink-800);border-left:1px solid var(--line);
    padding:96px 24px 32px;z-index:90;
  }
  .nav-links.is-open a{width:100%;padding:16px 4px;font-size:17px;border-bottom:1px solid var(--line);}
  .nav-links.is-open a::after{left:4px;right:auto;width:0;}
  .nav-links.is-open a.active::before{left:auto;right:0;bottom:50%;}
  .rank-layout{grid-template-columns:1fr;gap:32px;}
  .rank-feature{display:none;}
  .grid-posters{grid-template-columns:repeat(3,1fr);gap:16px;}
  .faq-layout{grid-template-columns:1fr;gap:32px;}
  .cat-span-7,.cat-span-5,.cat-span-4,.cat-span-8{grid-column:span 6;}
  .mix-offset{margin-top:0;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(odd){border-left:0;}
  .stat-item:nth-child(n+3){border-top:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px;}
}
@media (max-width:640px){
  body{font-size:15px;}
  .section{padding:56px 0;}
  .hero{min-height:76vh;padding:140px 0 72px;}
  .hero-sub{font-size:15px;}
  .hero-actions .btn{width:100%;}
  .rank-row{grid-template-columns:40px 64px 1fr;gap:14px;}
  .rank-thumb{width:64px;height:90px;}
  .rank-date{display:none;}
  .rank-no{font-size:24px;}
  .grid-posters{grid-template-columns:repeat(2,1fr);}
  .rail .card-poster{flex:0 0 62vw;width:62vw;}
  .news-row{grid-template-columns:1fr 24px;gap:14px;padding:18px 4px;}
  .news-date{display:none;}
  .news-tag{display:none;}
  .cat-span-7,.cat-span-5,.cat-span-4,.cat-span-8{grid-column:span 12;}
  .stats-grid{grid-template-columns:1fr;}
  .stat-item{border-left:0;border-top:1px solid var(--line);padding:32px 0;}
  .stat-item:first-child{border-top:0;}
  .footer-grid{grid-template-columns:1fr;gap:36px;}
  .cta-band{padding:72px 0;}
  .cta-actions .btn{width:100%;}
  .rail-btn{display:none;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --ink-900:#0A0B0D;
  --ink-800:#101216;
  --ink-700:#171A20;
  --ink-600:#1F232B;
  --line:#262A33;
  --line-strong:#333844;
  --text-1:#F0EDE7;
  --text-2:#A6A19A;
  --text-3:#6C6862;
  --brand:#FF6A1F;
  --brand-2:#2FD3B5;
  --paper:#F5F1E9;
  --paper-ink:#1A1B1F;
  --ok:#3FBF7F;
  --warn:#E4B33C;
  --err:#E5533D;
  --empty:#2A2E36;
  --radius-card:14px;
  --radius-img:12px;
  --radius-pill:999px;
  --radius-input:10px;
  --shadow-hover:0 12px 30px rgba(255,106,31,.12);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px; --sp-10:128px;
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  --font-num:"Archivo","Inter","Helvetica Neue",Arial,sans-serif;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(255,106,31,.3);color:var(--text-1);}

.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 32px;
}

/* ---------- Header ---------- */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:100;
  background:transparent;
  transition:background .3s var(--ease),backdrop-filter .3s var(--ease),border-color .3s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(10,11,13,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--sp-5);
  height:76px;
}
.brand{display:flex;align-items:center;gap:var(--sp-2);}
.brand-mark{
  font-family:var(--font-num);
  font-size:26px;
  font-weight:900;
  letter-spacing:-.03em;
  color:var(--text-1);
  line-height:1;
}
.brand-divider{width:1px;height:20px;background:var(--line-strong);display:inline-block;}
.brand-sub{font-size:13px;color:var(--text-2);letter-spacing:.06em;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:var(--sp-6);}
.nav-links a{
  position:relative;
  font-size:16px;
  color:var(--text-2);
  padding:6px 0;
  transition:color .22s var(--ease);
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  background:var(--brand);
  transition:width .22s var(--ease);
}
.nav-links a:hover{color:var(--text-1);}
.nav-links a:hover::after{width:100%;}
.nav-links a.active{color:var(--text-1);}
.nav-links a.active::after{width:100%;}
.nav-links a.active::before{
  content:"";
  position:absolute;
  left:50%;bottom:-8px;
  width:4px;height:4px;
  margin-left:-2px;
  border-radius:50%;
  background:var(--brand);
}
.nav-right{display:flex;align-items:center;gap:var(--sp-4);}
.nav-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:42px;
  padding:0 22px;
  border-radius:var(--radius-pill);
  background:var(--brand);
  color:#14100D;
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  white-space:nowrap;
  border:1px solid var(--brand);
  transition:background .22s var(--ease),color .22s var(--ease),transform .18s var(--ease);
}
.nav-cta:hover{background:var(--ink-900);color:var(--brand);}
.nav-cta:active{transform:scale(.98);}
.burger{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line);
  border-radius:10px;
  position:relative;
}
.burger span{
  position:absolute;left:11px;right:11px;height:1.5px;background:var(--text-1);
  transition:transform .25s var(--ease),opacity .2s var(--ease);
}
.burger span:nth-child(1){top:14px;}
.burger span:nth-child(2){top:20px;}
.burger span:nth-child(3){top:26px;}
.burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:var(--sp-2);
  height:50px;
  padding:0 30px;
  border-radius:var(--radius-pill);
  font-size:16px;
  font-weight:700;
  letter-spacing:.02em;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .18s var(--ease);
}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--brand);color:#14100D;border:1px solid var(--brand);}
.btn-primary:hover{background:transparent;color:var(--brand);}
.btn-ghost{background:transparent;color:var(--text-1);border:1px solid var(--line-strong);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-ghost[disabled],.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;}

/* ---------- Breadcrumb ---------- */
.breadcrumb{
  margin-top:112px;
  padding:var(--sp-4) 0;
  font-size:13px;
  color:var(--text-3);
  letter-spacing:.04em;
}
.breadcrumb a{color:var(--text-3);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--brand-2);}
.breadcrumb span.sep{margin:0 8px;color:var(--line-strong);}
.breadcrumb .current{color:var(--text-2);}

/* ---------- Page hero ---------- */
.page-hero{
  position:relative;
  min-height:56vh;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  transform:scale(1.02);
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,rgba(10,11,13,.96) 0%,rgba(10,11,13,.78) 46%,rgba(10,11,13,.32) 100%),
    radial-gradient(120% 100% at 50% 100%,rgba(10,11,13,0) 40%,rgba(10,11,13,.88) 100%);
}
.hero-inner{
  position:relative;
  z-index:2;
  width:100%;
  padding:var(--sp-8) 0 var(--sp-7);
}
.eyebrow{
  display:flex;
  align-items:center;
  gap:var(--sp-4);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--text-2);
  margin-bottom:var(--sp-5);
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--brand-2);display:inline-block;}
.page-title{
  font-size:clamp(34px,4.6vw,62px);
  font-weight:800;
  line-height:1.08;
  letter-spacing:-.02em;
  color:var(--text-1);
  max-width:820px;
}
.page-sub{
  margin-top:var(--sp-5);
  font-size:17px;
  color:var(--text-2);
  max-width:620px;
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:var(--sp-4);
  margin-top:var(--sp-6);
  font-size:14px;
  color:var(--text-2);
}
.hero-tags li{display:flex;align-items:center;gap:var(--sp-4);}
.hero-tags li+li::before{
  content:"";
  width:1px;height:14px;
  background:var(--line-strong);
  display:inline-block;
  margin-right:var(--sp-4);
}
.hero-tags li:first-child::before{display:none;}

/* ---------- Sections ---------- */
.section{padding:var(--sp-9) 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:var(--sp-6);
  margin-bottom:var(--sp-7);
}
.sec-title-wrap{display:flex;align-items:baseline;gap:var(--sp-3);}
.sec-no{
  font-family:var(--font-num);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--text-3);
}
.sec-title{
  font-size:clamp(24px,3vw,38px);
  font-weight:700;
  line-height:1.2;
  letter-spacing:-.01em;
  color:var(--text-1);
}
.sec-desc{margin-top:var(--sp-3);font-size:15px;color:var(--text-2);max-width:640px;}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:var(--text-2);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.link-more::after{content:"→";transition:transform .25s var(--ease);}
.link-more:hover{color:var(--brand);border-color:rgba(255,106,31,.4);}
.link-more:hover::after{transform:translateX(4px);}

/* ---------- Filter chips ---------- */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  gap:var(--sp-3);
  margin-bottom:var(--sp-7);
  padding-bottom:var(--sp-5);
  border-bottom:1px solid var(--line);
}
.chip{
  height:38px;
  padding:0 20px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);
  background:transparent;
  color:var(--text-2);
  font-size:14px;
  letter-spacing:.02em;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.chip:hover{color:var(--text-1);border-color:var(--text-3);}
.chip.is-active{border-color:var(--brand);color:var(--text-1);background:rgba(255,106,31,.06);}

/* ---------- Poster grid ---------- */
.poster-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:var(--sp-5);
}
.poster-card{
  position:relative;
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:transform .35s var(--ease),border-color .35s var(--ease),box-shadow .35s var(--ease);
}
.poster-card:hover{
  transform:translateY(-4px);
  border-color:var(--brand);
  box-shadow:var(--shadow-hover);
}
.poster-media{
  position:relative;
  aspect-ratio:2/3;
  overflow:hidden;
  background:var(--ink-600);
}
.poster-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease),filter .4s var(--ease);
}
.poster-card:hover .poster-media img{transform:scale(1.04);filter:brightness(.82);}
.poster-media::after{
  content:"";
  position:absolute;inset:auto 0 0 0;height:45%;
  background:linear-gradient(180deg,rgba(10,11,13,0),rgba(10,11,13,.9));
  opacity:.85;
  transition:opacity .4s var(--ease);
}
.poster-card:hover .poster-media::after{opacity:1;}
.poster-badge{
  position:absolute;
  top:12px;left:12px;
  z-index:2;
  padding:4px 10px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--brand-2);
  border:1px solid rgba(47,211,181,.55);
  border-radius:var(--radius-pill);
  background:rgba(10,11,13,.55);
}
.poster-body{padding:var(--sp-4) var(--sp-4) var(--sp-5);}
.poster-title{
  font-size:18px;
  font-weight:600;
  line-height:1.4;
  color:var(--text-1);
  transition:color .25s var(--ease);
}
.poster-card:hover .poster-title{color:var(--brand);}
.poster-meta{
  margin-top:var(--sp-2);
  font-size:13px;
  color:var(--text-3);
  font-family:var(--font-num);
  letter-spacing:.02em;
}
.poster-actions{
  display:flex;
  gap:var(--sp-4);
  margin-top:var(--sp-4);
  opacity:0;
  transform:translateY(6px);
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.poster-card:hover .poster-actions{opacity:1;transform:translateY(0);}
.poster-actions a{
  font-size:13px;
  color:var(--text-2);
  border-bottom:1px solid var(--line-strong);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.poster-actions a:hover{color:var(--brand-2);border-color:var(--brand-2);}
.load-more-wrap{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:var(--sp-3);
  margin-top:var(--sp-7);
}
.load-hint{font-size:13px;color:var(--text-3);}

/* ---------- Steps ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:var(--sp-5);
  position:relative;
}
.steps::before{
  content:"";
  position:absolute;
  top:19px;left:0;right:0;
  height:1px;
  background:var(--line);
}
.step{position:relative;padding-top:var(--sp-7);}
.step::before{
  content:"";
  position:absolute;
  top:14px;left:0;
  width:11px;height:11px;
  border-radius:50%;
  background:var(--ink-900);
  border:1px solid var(--line-strong);
  transition:border-color .3s var(--ease),background .3s var(--ease);
}
.step:hover::before{border-color:var(--brand);background:var(--brand);}
.step-no{
  font-family:var(--font-num);
  font-size:14px;
  font-weight:900;
  letter-spacing:.08em;
  color:var(--text-3);
}
.step-title{
  margin-top:var(--sp-3);
  font-size:19px;
  font-weight:600;
  color:var(--text-1);
  line-height:1.4;
}
.step-text{margin-top:var(--sp-3);font-size:15px;color:var(--text-2);}

/* ---------- Task list ---------- */
.split{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:var(--sp-8);
  align-items:start;
}
.task-list{border-top:1px solid var(--line);}
.task-item{
  display:flex;
  gap:var(--sp-4);
  padding:var(--sp-5) 0;
  border-bottom:1px solid var(--line);
  transition:background .25s var(--ease);
}
.task-item:hover{background:var(--ink-800);}
.task-check{
  flex:0 0 auto;
  width:22px;height:22px;
  margin-top:4px;
  border:1px solid var(--brand-2);
  border-radius:6px;
  position:relative;
}
.task-check::after{
  content:"";
  position:absolute;
  left:6px;top:2px;
  width:9px;height:14px;
  border-right:1.5px solid var(--brand-2);
  border-bottom:1.5px solid var(--brand-2);
  transform:rotate(42deg) scale(.85);
}
.task-body h3{font-size:18px;font-weight:600;color:var(--text-1);line-height:1.4;}
.task-body p{margin-top:var(--sp-2);font-size:15px;color:var(--text-2);}
.side-figure{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--ink-700);
}
.side-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.side-figure figcaption{
  padding:var(--sp-4) var(--sp-5) var(--sp-5);
  font-size:14px;
  color:var(--text-2);
}

/* ---------- Data strip ---------- */
.data-strip{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.data-cell{
  padding:var(--sp-6) var(--sp-5);
  border-right:1px solid var(--line);
}
.data-cell:last-child{border-right:0;}
.data-num{
  font-family:var(--font-num);
  font-size:clamp(30px,3.4vw,46px);
  font-weight:900;
  letter-spacing:-.03em;
  color:var(--text-1);
  line-height:1;
}
.data-label{margin-top:var(--sp-3);font-size:13px;color:var(--text-3);letter-spacing:.06em;}

/* ---------- FAQ ---------- */
.faq-layout{
  display:grid;
  grid-template-columns:4fr 7fr;
  gap:var(--sp-8);
  align-items:start;
}
.faq-aside p{margin-top:var(--sp-4);font-size:15px;color:var(--text-2);}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);position:relative;}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--sp-5);
  padding:var(--sp-5) 0 var(--sp-5) var(--sp-5);
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--text-2);
  transition:color .25s var(--ease);
}
.faq-item::before{
  content:"";
  position:absolute;
  left:0;top:calc(var(--sp-5) + 4px);
  width:2px;height:0;
  background:var(--brand);
  transition:height .3s var(--ease);
}
.faq-item.is-open::before{height:22px;}
.faq-item.is-open .faq-q{color:var(--text-1);}
.faq-q:hover{color:var(--text-1);}
.faq-icon{
  flex:0 0 auto;
  width:18px;height:18px;
  position:relative;
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--text-2);
  transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.faq-icon::before{left:0;top:8.5px;width:18px;height:1px;}
.faq-icon::after{left:8.5px;top:0;width:1px;height:18px;}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0;}
.faq-item.is-open .faq-icon::before{background:var(--brand);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s var(--ease);
}
.faq-a p{
  padding:0 var(--sp-5) var(--sp-5) var(--sp-5);
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;
  padding:var(--sp-9) 0;
  background:var(--ink-800);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  opacity:.16;
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:64px 64px;
}
.cta-inner{position:relative;z-index:2;max-width:720px;}
.cta-inner h2{
  font-size:clamp(24px,3vw,36px);
  font-weight:700;
  line-height:1.2;
  letter-spacing:-.01em;
  color:var(--text-1);
}
.cta-inner p{margin-top:var(--sp-4);font-size:16px;color:var(--text-2);}
.cta-actions{margin-top:var(--sp-6);display:flex;flex-wrap:wrap;align-items:center;gap:var(--sp-5);}

/* ---------- Footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  padding:var(--sp-8) 0 var(--sp-5);
  background:var(--ink-900);
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:var(--sp-8);
  padding-bottom:var(--sp-8);
}
.footer-brand .brand{margin-bottom:var(--sp-5);}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:340px;}
.footer-col h3{
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--text-3);
  margin-bottom:var(--sp-5);
}
.footer-col li+li{margin-top:var(--sp-3);}
.footer-link{
  font-size:14px;
  color:var(--text-2);
  position:relative;
  transition:color .2s var(--ease);
}
.footer-link::after{
  content:"";
  position:absolute;
  left:0;bottom:-3px;
  width:0;height:1px;
  background:var(--brand);
  transition:width .22s var(--ease);
}
.footer-link:hover{color:var(--text-1);}
.footer-link:hover::after{width:100%;}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:var(--sp-4);
  padding-top:var(--sp-5);
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);transition:color .2s var(--ease);}
.footer-bottom a:hover{color:var(--text-2);}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 24px;}
  .burger{display:block;}
  .nav-links{
    position:fixed;
    top:0;right:0;
    width:88%;
    max-width:400px;
    height:100vh;
    flex-direction:column;
    align-items:flex-start;
    justify-content:flex-start;
    gap:0;
    padding:104px 28px 40px;
    background:rgba(10,11,13,.97);
    backdrop-filter:blur(14px);
    border-left:1px solid var(--line);
    transform:translateX(100%);
    transition:transform .34s var(--ease);
    overflow-y:auto;
  }
  .nav-links.is-open{transform:translateX(0);}
  .nav-links a{
    width:100%;
    font-size:17px;
    padding:16px 0;
    border-bottom:1px solid var(--line);
    opacity:0;
    transform:translateX(12px);
    transition:opacity .3s var(--ease),transform .3s var(--ease),color .2s var(--ease);
  }
  .nav-links.is-open a{opacity:1;transform:none;}
  .nav-links.is-open a:nth-child(1){transition-delay:.04s;}
  .nav-links.is-open a:nth-child(2){transition-delay:.08s;}
  .nav-links.is-open a:nth-child(3){transition-delay:.12s;}
  .nav-links.is-open a:nth-child(4){transition-delay:.16s;}
  .nav-links.is-open a:nth-child(5){transition-delay:.20s;}
  .nav-links a::after{display:none;}
  .nav-links a.active::before{display:none;}
  .nav-links a.active{color:var(--brand);}
  .nav-cta{display:none;}
  .poster-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps::before{display:none;}
  .split{grid-template-columns:1fr;gap:var(--sp-7);}
  .faq-layout{grid-template-columns:1fr;gap:var(--sp-7);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-7);}
}
@media (max-width:768px){
  .section{padding:var(--sp-8) 0;}
  .page-hero{min-height:62vh;}
  .page-title{font-size:clamp(30px,7vw,42px);}
  .section-head{flex-direction:column;align-items:flex-start;gap:var(--sp-4);}
  .data-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .data-cell{border-bottom:1px solid var(--line);}
  .data-cell:nth-child(2n){border-right:0;}
  .data-cell:nth-last-child(-n+2){border-bottom:0;}
  .breadcrumb{margin-top:100px;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  .nav-inner{height:66px;}
  .brand-mark{font-size:23px;}
  .brand-sub{font-size:12px;}
  .poster-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--sp-4);}
  .steps{grid-template-columns:1fr;gap:var(--sp-6);}
  .step{padding-top:var(--sp-5);}
  .step::before{position:static;display:inline-block;margin-bottom:var(--sp-3);}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .btn{width:100%;}
  .cta-actions{flex-direction:column;align-items:stretch;}
  .hero-tags{font-size:13px;gap:var(--sp-3);}
  .hero-tags li+li::before{margin-right:var(--sp-3);}
  .faq-q{font-size:16px;padding-left:var(--sp-4);}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --ink-900:#0A0B0D;
  --ink-800:#101216;
  --ink-700:#171A20;
  --ink-600:#1F232B;
  --line:#262A33;
  --line-strong:#333844;
  --text-1:#F0EDE7;
  --text-2:#A6A19A;
  --text-3:#6C6862;
  --brand:#FF6A1F;
  --brand-2:#2FD3B5;
  --paper:#F5F1E9;
  --paper-ink:#1A1B1F;
  --ok:#3FBF7F;
  --warn:#E4B33C;
  --err:#E5533D;
  --empty:#2A2E36;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:10px;
  --maxw:1280px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,sans-serif;
  --font-num:"Archivo","Inter","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-1);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{max-width:var(--maxw);margin:0 auto;padding:0 32px;width:100%}
@media (min-width:1440px){.container{max-width:1440px;padding:0 48px}}
@media (max-width:640px){.container{padding:0 20px}}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .35s var(--ease),border-color .35s var(--ease);
}
.site-header.scrolled{
  background:rgba(10,11,13,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;gap:32px;height:76px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  font-family:var(--font-num);
  font-size:24px;font-weight:900;letter-spacing:-.03em;color:var(--text-1);
  line-height:1;
}
.brand-divider{width:1px;height:20px;background:var(--line-strong);display:inline-block}
.brand-sub{font-size:13px;color:var(--text-2);letter-spacing:.02em}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-links a{
  position:relative;font-size:16px;color:var(--text-2);
  padding:6px 0;transition:color .25s var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-links a:hover{color:var(--text-1)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--text-1)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active::before{
  content:"";position:absolute;left:50%;bottom:-9px;width:4px;height:4px;margin-left:-2px;
  border-radius:50%;background:var(--brand);
}
.nav-right{display:flex;align-items:center;gap:16px;flex:0 0 auto}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:42px;padding:0 22px;border-radius:999px;
  background:var(--brand);color:#0A0B0D;font-size:15px;font-weight:700;
  border:1px solid var(--brand);
  transition:background .25s var(--ease),color .25s var(--ease),transform .2s var(--ease);
}
.nav-cta:hover{background:transparent;color:var(--brand)}
.nav-cta:active{transform:scale(.98)}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--line-strong);
  border-radius:var(--r-sm);background:transparent;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.burger span{display:block;width:18px;height:2px;background:var(--text-1);transition:transform .25s var(--ease),opacity .2s var(--ease)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- page shell ---------- */
main{display:block}
.page-shell{padding-top:76px}
.crumb-wrap{padding:26px 0 0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.breadcrumb a{color:var(--text-3);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--text-1)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .now{color:var(--text-2);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- article head ---------- */
.article-head{padding:40px 0 0;border-bottom:1px solid var(--line)}
.eyebrow{
  display:inline-flex;align-items:center;gap:12px;
  font-size:12px;letter-spacing:.08em;color:var(--text-3);margin-bottom:20px;
}
.eyebrow::before{content:"";display:block;width:24px;height:1px;background:var(--brand-2)}
.article-head h1{
  font-size:clamp(30px,4.2vw,54px);
  font-weight:800;line-height:1.14;letter-spacing:-.02em;color:var(--text-1);
  max-width:960px;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-top:26px;padding-bottom:30px;font-size:13px;color:var(--text-3);
}
.meta-row .dot{width:1px;height:12px;background:var(--line-strong);display:inline-block}
.meta-row .cat{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  border:1px solid var(--brand-2);color:var(--brand-2);font-size:12px;letter-spacing:.04em;
}

/* ---------- article body ---------- */
.article-main{padding:56px 0 0}
.paper-card{
  max-width:820px;margin:0 auto;
  background:var(--paper);color:var(--paper-ink);
  border-radius:var(--r-lg);
  padding:56px 64px;
}
.prose{font-size:17px;line-height:1.9;color:#26272C}
.prose>*+*{margin-top:1.4em}
.prose p{margin:0}
.prose h2{
  font-size:24px;font-weight:800;line-height:1.35;letter-spacing:-.01em;
  color:var(--paper-ink);margin-top:48px;margin-bottom:16px;
  padding-top:8px;
}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:19px;font-weight:700;color:var(--paper-ink);margin-top:32px;margin-bottom:12px}
.prose a{color:#B4470F;border-bottom:1px solid rgba(180,71,15,.35);transition:border-color .2s var(--ease)}
.prose a:hover{border-bottom-color:#B4470F}
.prose ul,.prose ol{margin-top:16px;padding-left:22px}
.prose ul li{list-style:square;margin:8px 0}
.prose ol li{list-style:decimal;margin:8px 0}
.prose blockquote{
  border-left:3px solid var(--brand-2);
  padding:4px 0 4px 20px;margin:28px 0;
  color:#41434A;font-size:17px;
}
.prose img{border-radius:12px;margin:28px auto;width:100%}
.prose figcaption,.prose .caption{font-size:13px;color:#7B7C82;text-align:center;margin-top:-14px}
.prose table{width:100%;border-collapse:collapse;font-size:15px;margin:24px 0}
.prose th,.prose td{border-bottom:1px solid #DCD6CA;padding:10px 12px;text-align:left}
.prose th{font-weight:700;color:var(--paper-ink)}
.prose hr{border:0;border-top:1px solid #DCD6CA;margin:36px 0}

/* ---------- tags & back ---------- */
.article-foot{max-width:820px;margin:28px auto 0;display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:999px;
  border:1px solid var(--line-strong);color:var(--text-2);font-size:13px;
  transition:border-color .25s var(--ease),color .25s var(--ease);
}
.tag:hover{border-color:var(--brand-2);color:var(--brand-2)}
.back-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);transition:color .25s var(--ease)}
.back-link .arrow{transition:transform .25s var(--ease)}
.back-link:hover{color:var(--brand)}
.back-link:hover .arrow{transform:translateX(-4px)}

/* ---------- empty state ---------- */
.empty-state{
  text-align:center;padding:64px 24px;color:var(--text-2);
}
.empty-state .icon{
  width:56px;height:56px;margin:0 auto 20px;border-radius:50%;
  border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;
}
.empty-state .icon svg{width:24px;height:24px;stroke:var(--text-3)}
.empty-state h2{font-size:22px;color:var(--text-1);font-weight:700;margin-bottom:10px}
.empty-state p{font-size:15px;color:var(--text-2);margin-bottom:22px}
.ghost-btn{
  display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 24px;
  border-radius:var(--r-sm);border:1px solid var(--text-1);color:var(--text-1);
  font-size:15px;transition:background .25s var(--ease),color .25s var(--ease),transform .2s var(--ease);
}
.ghost-btn:hover{background:var(--text-1);color:var(--ink-900)}
.ghost-btn:active{transform:scale(.98)}

/* ---------- related ---------- */
.related{padding:96px 0 0}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;padding-bottom:24px;border-bottom:1px solid var(--line)}
.sec-title{display:flex;align-items:baseline;gap:12px}
.sec-no{font-family:var(--font-num);font-size:13px;color:var(--text-3);letter-spacing:.06em}
.sec-title h2{font-size:clamp(22px,2.4vw,32px);font-weight:700;letter-spacing:-.01em;color:var(--text-1)}
.sec-sub{font-size:14px;color:var(--text-2);margin-top:8px}
.more-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);transition:color .25s var(--ease)}
.more-link .arrow{transition:transform .25s var(--ease)}
.more-link:hover{color:var(--brand)}
.more-link:hover .arrow{transform:translateX(4px)}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:32px}
.rel-card{
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  background:var(--ink-700);display:flex;flex-direction:column;
  transition:transform .4s var(--ease),border-color .4s var(--ease),box-shadow .4s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:0 12px 30px rgba(255,106,31,.12)}
.rel-cover{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--ink-600)}
.rel-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.rel-card:hover .rel-cover img{transform:scale(1.04)}
.rel-cover .badge{
  position:absolute;top:12px;left:12px;height:24px;padding:0 10px;border-radius:999px;
  border:1px solid var(--brand-2);color:var(--brand-2);background:rgba(10,11,13,.55);
  font-size:12px;display:inline-flex;align-items:center;
}
.rel-body{padding:20px 20px 24px}
.rel-body h3{font-size:18px;font-weight:600;line-height:1.4;color:var(--text-1);transition:color .3s var(--ease)}
.rel-card:hover .rel-body h3{color:var(--brand)}
.rel-body p{font-size:14px;color:var(--text-2);margin-top:10px;line-height:1.7}
.rel-meta{display:flex;align-items:center;gap:10px;margin-top:16px;font-size:13px;color:var(--text-3)}

/* ---------- cta strip ---------- */
.cta-strip{margin-top:96px}
.cta-inner{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  background:var(--ink-800);border:1px solid var(--line);
  padding:64px 56px;min-height:280px;display:flex;align-items:center;
}
.cta-inner::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;opacity:.16;
}
.cta-inner::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(240,237,231,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(240,237,231,.05) 1px,transparent 1px);
  background-size:48px 48px;
}
.cta-content{position:relative;z-index:1;max-width:640px}
.cta-content h2{font-size:clamp(24px,3vw,36px);font-weight:700;letter-spacing:-.01em;color:var(--text-1);line-height:1.25}
.cta-content p{font-size:15px;color:var(--text-2);margin-top:14px}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:28px}
.primary-btn{
  display:inline-flex;align-items:center;justify-content:center;height:48px;padding:0 28px;
  border-radius:999px;background:var(--brand);color:var(--ink-900);font-size:15px;font-weight:700;
  border:1px solid var(--brand);transition:background .25s var(--ease),color .25s var(--ease),transform .2s var(--ease);
}
.primary-btn:hover{background:transparent;color:var(--brand)}
.primary-btn:active{transform:scale(.98)}
.text-link{font-size:15px;color:var(--text-2);border-bottom:1px solid var(--line-strong);padding-bottom:2px;transition:color .25s var(--ease),border-color .25s var(--ease)}
.text-link:hover{color:var(--brand);border-color:var(--brand)}

/* ---------- footer ---------- */
.site-footer{margin-top:96px;border-top:1px solid var(--line);padding:72px 0 0;background:var(--ink-900)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{font-size:14px;color:var(--text-2);margin-top:18px;line-height:1.8;max-width:36ch}
.footer-col h3{font-size:13px;letter-spacing:.08em;color:var(--text-3);font-weight:600;margin-bottom:18px}
.footer-col li+li{margin-top:12px}
.footer-link{position:relative;font-size:14px;color:var(--text-2);transition:color .25s var(--ease)}
.footer-link::after{
  content:"";position:absolute;left:0;bottom:-3px;width:100%;height:1px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease);
}
.footer-link:hover{color:var(--text-1)}
.footer-link:hover::after{transform:scaleX(1)}
.footer-bottom{
  margin-top:56px;padding:24px 0;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);transition:color .25s var(--ease)}
.footer-bottom a:hover{color:var(--brand-2)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;width:88%;max-width:380px;
    background:var(--ink-800);border-left:1px solid var(--line);
    flex-direction:column;align-items:flex-start;justify-content:flex-start;
    gap:8px;padding:110px 28px 40px;margin-left:0;
    transform:translateX(100%);transition:transform .35s var(--ease);
    z-index:55;
  }
  .nav-links.open{transform:translateX(0)}
  .nav-links a{width:100%;font-size:17px;padding:14px 0;border-bottom:1px solid var(--line)}
  .nav-links a::after{display:none}
  .nav-links a.active::before{display:none}
  .nav-links a.active{color:var(--brand)}
  .burger{display:flex}
  .nav-cta{display:none}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .paper-card{padding:40px 32px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .nav-inner{height:68px;gap:16px}
  .page-shell{padding-top:68px}
  .article-head{padding-top:28px}
  .article-main{padding-top:36px}
  .paper-card{padding:32px 22px;border-radius:var(--r-md)}
  .prose{font-size:16px;line-height:1.85}
  .prose h2{font-size:21px;margin-top:36px}
  .rel-grid{grid-template-columns:1fr}
  .cta-inner{padding:44px 24px}
  .related{padding-top:64px}
  .site-footer{padding-top:52px}
}
@media (max-width:520px){
  .brand-sub{display:none}
  .brand-divider{display:none}
  .crumb-wrap{padding-top:18px}
  .breadcrumb .now{max-width:100%;white-space:normal}
  .article-foot{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --ink-900:#0A0B0D;
  --ink-800:#101216;
  --ink-700:#171A20;
  --ink-600:#1F232B;
  --line:#262A33;
  --line-strong:#333844;
  --text-1:#F0EDE7;
  --text-2:#A6A19A;
  --text-3:#6C6862;
  --brand:#FF6A1F;
  --brand-2:#2FD3B5;
  --paper:#F5F1E9;
  --paper-ink:#1A1B1F;
  --ok:#3FBF7F;
  --warn:#E4B33C;
  --err:#E5533D;
  --empty:#2A2E36;
  --r-card:14px;
  --r-img:12px;
  --r-paper:18px;
  --r-input:10px;
  --container:1280px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --shadow-hover:0 12px 30px rgba(255,106,31,.12);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font:inherit;}
h1,h2,h3,h4,p,ul,ol,li,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}
@media (min-width:1441px){
  .container{max-width:1320px;}
}

/* ---------- Header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  background:transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease),backdrop-filter .3s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(10,11,13,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:76px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:8px;
  flex-shrink:0;
}
.brand-mark{
  font-family:"Archivo","Inter","PingFang SC",sans-serif;
  font-weight:900;
  font-size:22px;
  letter-spacing:-.04em;
  color:var(--text-1);
}
.brand-divider{
  width:1px;
  height:18px;
  background:var(--line-strong);
  display:inline-block;
}
.brand-sub{
  font-size:13px;
  color:var(--text-2);
  letter-spacing:.02em;
  white-space:nowrap;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:28px;
}
.nav-links a{
  position:relative;
  font-size:16px;
  color:var(--text-2);
  padding:6px 0;
  transition:color .22s var(--ease);
  white-space:nowrap;
}
.nav-links a::before{
  content:"";
  position:absolute;
  left:0;bottom:0;
  height:2px;
  width:0;
  background:var(--brand);
  transition:width .22s var(--ease);
}
.nav-links a:hover{color:var(--text-1);}
.nav-links a:hover::before{width:100%;}
.nav-links a.active{color:var(--text-1);}
.nav-links a.active::before{width:100%;}
.nav-links a.active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-8px;
  transform:translateX(-50%);
  width:4px;height:4px;
  border-radius:50%;
  background:var(--brand);
}
.nav-right{display:flex;align-items:center;gap:16px;}
.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 22px;
  border-radius:999px;
  background:var(--brand);
  color:#140803;
  font-size:15px;
  font-weight:600;
  border:1px solid var(--brand);
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .2s var(--ease);
  white-space:nowrap;
}
.nav-cta:hover{
  background:var(--ink-900);
  color:var(--brand);
  border-color:var(--brand);
}
.nav-cta:active{transform:scale(.98);}
.burger{
  display:none;
  width:40px;height:40px;
  border-radius:var(--r-input);
  border:1px solid var(--line);
  position:relative;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
}
.burger span{
  display:block;
  width:16px;height:1.5px;
  background:var(--text-1);
  transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(5.5px) rotate(45deg);}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg);}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  min-height:58vh;
  display:flex;
  align-items:flex-end;
  padding:150px 0 64px;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,rgba(10,11,13,.94) 0%,rgba(10,11,13,.7) 46%,rgba(10,11,13,.32) 100%),
    linear-gradient(180deg,rgba(10,11,13,.7) 0%,rgba(10,11,13,.2) 40%,var(--ink-900) 100%);
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  box-shadow:inset 0 0 200px rgba(0,0,0,.8);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.eyebrow{
  display:flex;
  align-items:center;
  gap:12px;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--text-3);
  margin-bottom:20px;
}
.eyebrow::before{
  content:"";
  width:24px;height:1px;
  background:var(--brand-2);
  display:block;
}
.page-hero h1{
  font-size:clamp(38px,5.6vw,68px);
  font-weight:800;
  line-height:1.06;
  letter-spacing:-.02em;
  color:var(--text-1);
  max-width:900px;
}
.page-hero h1 em{
  font-style:normal;
  color:var(--brand);
}
.hero-sub{
  margin-top:18px;
  font-size:17px;
  color:var(--text-2);
  max-width:640px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  margin-top:32px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 28px;
  font-size:15px;
  font-weight:600;
  border-radius:999px;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .2s var(--ease),box-shadow .25s var(--ease);
}
.btn-primary{
  background:var(--brand);
  color:#140803;
  border:1px solid var(--brand);
}
.btn-primary:hover{
  background:var(--ink-900);
  color:var(--brand);
  box-shadow:var(--shadow-hover);
}
.btn-ghost{
  background:transparent;
  color:var(--text-1);
  border:1px solid var(--text-1);
}
.btn-ghost:hover{
  border-color:var(--brand);
  color:var(--brand);
}
.btn:active{transform:scale(.98);}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  margin-top:30px;
  font-size:14px;
  color:var(--text-2);
}
.hero-tags span{
  display:inline-flex;
  align-items:center;
  gap:14px;
}
.hero-tags span + span::before{
  content:"";
  width:1px;height:12px;
  background:var(--line-strong);
  display:inline-block;
}

/* ---------- Sections ---------- */
.section{padding:96px 0;}
.section.tight{padding:64px 0 96px;}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:40px;
}
.sec-title-wrap{max-width:760px;}
.sec-num{
  display:inline-block;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--text-3);
  margin-right:12px;
  vertical-align:baseline;
}
.sec-title{
  display:inline;
  font-size:clamp(24px,3vw,38px);
  font-weight:700;
  line-height:1.2;
  letter-spacing:-.01em;
  color:var(--text-1);
}
.sec-desc{
  margin-top:14px;
  font-size:16px;
  color:var(--text-2);
  max-width:700px;
}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  color:var(--brand-2);
  border-bottom:1px solid rgba(47,211,181,.35);
  padding-bottom:2px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.link-more i{transition:transform .25s var(--ease);}
.link-more:hover{color:var(--brand);border-color:var(--brand);}
.link-more:hover i{transform:translateX(4px);}

/* ---------- Rank layout ---------- */
.rank-layout{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:56px;
  align-items:start;
}
.rank-list{border-top:1px solid var(--line);}
.rank-row{
  display:grid;
  grid-template-columns:84px 1fr 76px;
  align-items:center;
  gap:24px;
  padding:18px 12px 18px 0;
  border-bottom:1px solid var(--line);
  transition:background .25s var(--ease),padding-left .25s var(--ease);
}
.rank-row:hover{
  background:var(--ink-800);
  padding-left:12px;
}
.rank-num{
  font-family:"Archivo","Inter",sans-serif;
  font-size:clamp(34px,4vw,54px);
  font-weight:900;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--text-3);
  transition:color .25s var(--ease);
}
.rank-row:hover .rank-num{color:var(--brand);}
.rank-body h3{
  font-size:18px;
  font-weight:600;
  line-height:1.4;
  color:var(--text-1);
  transition:color .25s var(--ease);
  margin-bottom:4px;
}
.rank-row:hover .rank-body h3{color:var(--brand);}
.rank-body p{
  font-size:14px;
  line-height:1.7;
  color:var(--text-2);
}
.rank-thumb{
  width:76px;
  height:96px;
  border-radius:var(--r-img);
  overflow:hidden;
  background:var(--ink-700);
  border:1px solid var(--line);
  justify-self:end;
  transition:border-color .25s var(--ease);
}
.rank-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.rank-row:hover .rank-thumb{border-color:var(--brand);}
.rank-row:hover .rank-thumb img{transform:scale(1.06);}

.rank-side{position:sticky;top:104px;}
.side-card{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--ink-700);
  aspect-ratio:3/4;
}
.side-card img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s var(--ease);
}
.side-card:hover img{transform:scale(1.04);}
.side-card::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(10,11,13,0) 40%,rgba(10,11,13,.9) 100%);
}
.side-badge{
  position:absolute;
  top:16px;left:16px;
  z-index:3;
  font-size:12px;
  letter-spacing:.08em;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid var(--brand-2);
  color:var(--brand-2);
  background:rgba(10,11,13,.5);
}
.side-info{
  position:absolute;
  left:20px;right:20px;bottom:20px;
  z-index:3;
}
.side-info h3{
  font-size:20px;
  font-weight:600;
  color:var(--text-1);
  line-height:1.4;
  margin-bottom:6px;
}
.side-info p{
  font-size:13px;
  color:var(--text-3);
  line-height:1.7;
}

/* ---------- Checklist section ---------- */
.check-split{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:56px;
  align-items:start;
}
.check-intro .sec-title{display:block;}
.check-list{border-top:1px solid var(--line);}
.check-item{
  display:grid;
  grid-template-columns:32px 1fr;
  gap:20px;
  padding:24px 0;
  border-bottom:1px solid var(--line);
  transition:background .25s var(--ease);
}
.check-item:hover{background:var(--ink-800);}
.check-icon{
  width:32px;height:32px;
  border-radius:50%;
  border:1px solid var(--line-strong);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--brand-2);
  font-size:13px;
  transition:border-color .25s var(--ease),color .25s var(--ease);
}
.check-item:hover .check-icon{border-color:var(--brand);color:var(--brand);}
.check-item h3{
  font-size:19px;
  font-weight:600;
  color:var(--text-1);
  margin-bottom:6px;
}
.check-item p{font-size:15px;color:var(--text-2);}
.check-note{
  margin-top:32px;
  padding:24px;
  border-radius:var(--r-card);
  background:var(--ink-700);
  border:1px solid var(--line);
}
.check-note h3{
  font-size:17px;
  color:var(--text-1);
  margin-bottom:10px;
}
.check-note p{font-size:14px;color:var(--text-2);}

/* ---------- Tag cloud ---------- */
.tagband{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:48px 0;
}
.tagband-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
}
.tag{
  display:inline-flex;
  align-items:center;
  padding:9px 18px;
  border-radius:999px;
  border:1px solid var(--line-strong);
  font-size:14px;
  color:var(--text-2);
  background:transparent;
  transition:border-color .25s var(--ease),color .25s var(--ease),background .25s var(--ease);
}
.tag:hover{
  border-color:var(--brand);
  color:var(--text-1);
  background:var(--ink-800);
}
.tag.hot{
  border-color:var(--brand-2);
  color:var(--brand-2);
}

/* ---------- FAQ ---------- */
.faq-layout{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:56px;
  align-items:start;
}
.faq-side .sec-title{display:block;margin-bottom:14px;}
.faq-side p{font-size:15px;color:var(--text-2);margin-bottom:20px;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  text-align:left;
  padding:22px 0;
  font-size:17px;
  font-weight:600;
  color:var(--text-2);
  transition:color .25s var(--ease);
}
.faq-q:hover{color:var(--text-1);}
.faq-item.open .faq-q{color:var(--text-1);}
.faq-mark{
  position:relative;
  width:16px;height:16px;
  flex-shrink:0;
}
.faq-mark::before,.faq-mark::after{
  content:"";
  position:absolute;
  background:var(--brand);
  transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.faq-mark::before{left:0;top:7.5px;width:16px;height:1.5px;}
.faq-mark::after{top:0;left:7.5px;height:16px;width:1.5px;}
.faq-item.open .faq-mark::after{transform:scaleY(0);opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s var(--ease);
}
.faq-a-inner{
  padding:0 40px 24px 0;
  border-left:2px solid transparent;
  padding-left:0;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
}
.faq-item.open .faq-a-inner{
  border-left:2px solid var(--brand);
  padding-left:16px;
}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  background:var(--ink-800);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:88px 0;
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;
  background-position:center;
  opacity:.16;
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(38,42,51,.5) 1px,transparent 1px),
    linear-gradient(90deg,rgba(38,42,51,.5) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.5;
}
.cta-inner{position:relative;z-index:2;max-width:760px;}
.cta-inner h2{
  font-size:clamp(26px,3.2vw,42px);
  font-weight:700;
  line-height:1.22;
  letter-spacing:-.01em;
  color:var(--text-1);
  margin-bottom:16px;
}
.cta-inner p{font-size:17px;color:var(--text-2);margin-bottom:32px;}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px;}

/* ---------- Footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--ink-900);
  padding:72px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:48px;
  padding-bottom:56px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{
  font-size:14px;
  line-height:1.8;
  color:var(--text-2);
  max-width:340px;
}
.footer-col h3{
  font-size:13px;
  letter-spacing:.08em;
  color:var(--text-3);
  font-weight:600;
  margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-link{
  position:relative;
  display:inline-block;
  font-size:14px;
  color:var(--text-2);
  transition:color .22s var(--ease);
}
.footer-link::after{
  content:"";
  position:absolute;
  left:0;bottom:-2px;
  width:0;height:1px;
  background:var(--brand);
  transition:width .22s var(--ease);
}
.footer-link:hover{color:var(--text-1);}
.footer-link:hover::after{width:100%;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:22px 0;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);border-bottom:1px solid var(--line-strong);}
.footer-bottom a:hover{color:var(--brand);border-color:var(--brand);}

/* ---------- Reveal ---------- */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
}
.reveal.visible{opacity:1;transform:none;}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 24px;}
  .nav-links{gap:20px;}
  .nav-links a{font-size:15px;}
  .rank-layout,
  .check-split,
  .faq-layout{grid-template-columns:1fr;gap:40px;}
  .rank-side{position:static;}
  .side-card{aspect-ratio:16/9;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .section{padding:72px 0;}
}
@media (max-width:820px){
  .burger{display:flex;}
  .nav-cta{display:none;}
  .nav-links{
    position:fixed;
    top:0;right:0;
    width:88%;
    max-width:360px;
    height:100vh;
    background:var(--ink-800);
    border-left:1px solid var(--line);
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:96px 28px 40px;
    transform:translateX(100%);
    transition:transform .35s var(--ease);
    z-index:90;
  }
  .nav-links.open{transform:translateX(0);}
  .nav-links a{
    width:100%;
    padding:16px 0;
    font-size:17px;
    border-bottom:1px solid var(--line);
    opacity:0;
    transform:translateX(12px);
    transition:opacity .3s var(--ease),transform .3s var(--ease),color .22s var(--ease);
  }
  .nav-links.open a{opacity:1;transform:none;}
  .nav-links.open a:nth-child(1){transition-delay:.04s;}
  .nav-links.open a:nth-child(2){transition-delay:.08s;}
  .nav-links.open a:nth-child(3){transition-delay:.12s;}
  .nav-links.open a:nth-child(4){transition-delay:.16s;}
  .nav-links.open a:nth-child(5){transition-delay:.20s;}
  .nav-links a::before{display:none;}
  .nav-links a.active::after{display:none;}
  .nav-links a.active{color:var(--brand);}
  .page-hero{min-height:auto;padding:130px 0 56px;}
  .hero-sub{font-size:16px;}
  .rank-row{grid-template-columns:60px 1fr 64px;gap:16px;}
  .rank-thumb{width:64px;height:82px;}
  .rank-num{font-size:32px;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  .brand-sub{display:none;}
  .section{padding:56px 0;}
  .section.tight{padding:40px 0 56px;}
  .rank-row{grid-template-columns:48px 1fr 56px;gap:12px;padding:16px 8px 16px 0;}
  .rank-num{font-size:26px;}
  .rank-body h3{font-size:16px;}
  .rank-body p{font-size:13px;}
  .rank-thumb{width:56px;height:74px;}
  .side-card{aspect-ratio:4/3;}
  .btn{padding:12px 22px;font-size:14px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .cta-band{padding:64px 0;}
  .hero-actions .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category4 */
:root{
  --ink-900:#0A0B0D;
  --ink-800:#101216;
  --ink-700:#171A20;
  --ink-600:#1F232B;
  --line:#262A33;
  --line-strong:#333844;
  --text-1:#F0EDE7;
  --text-2:#A6A19A;
  --text-3:#6C6862;
  --brand:#FF6A1F;
  --brand-2:#2FD3B5;
  --paper:#F5F1E9;
  --paper-ink:#1A1B1F;
  --ok:#3FBF7F;
  --warn:#E4B33C;
  --err:#E5533D;
  --empty:#2A2E36;

  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:999px;
  --radius-btn-2:10px;
  --radius-input:10px;
  --radius-paper:18px;

  --space-1:4px;
  --space-2:8px;
  --space-3:12px;
  --space-4:16px;
  --space-5:24px;
  --space-6:32px;
  --space-7:48px;
  --space-8:64px;
  --space-9:96px;
  --space-10:128px;

  --container:1280px;
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",sans-serif;
  --font-num:"Archivo","Inter","Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-1);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;background-color:transparent;}
button{font-family:inherit;font-size: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;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

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

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .3s ease,border-color .3s ease,backdrop-filter .3s ease;
}
.site-header.scrolled{
  background:rgba(10,11,13,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:76px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:8px;
  flex-shrink:0;
}
.brand-mark{
  font-family:var(--font-num);
  font-weight:900;
  font-size:22px;
  letter-spacing:-.02em;
  color:var(--text-1);
}
.brand-divider{
  width:1px;
  height:18px;
  background:var(--line-strong);
}
.brand-sub{
  font-size:13px;
  color:var(--text-2);
  letter-spacing:.04em;
  white-space:nowrap;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:28px;
  margin-left:auto;
}
.nav-links a{
  position:relative;
  font-size:16px;
  color:var(--text-2);
  padding:6px 0;
  transition:color .2s ease;
  white-space:nowrap;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:100%;height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s cubic-bezier(.2,.7,.2,1);
}
.nav-links a:hover{color:var(--text-1);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--text-1);}
.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active::before{
  content:"";
  position:absolute;
  left:50%;bottom:-8px;
  width:4px;height:4px;
  margin-left:-2px;
  border-radius:50%;
  background:var(--brand);
}
.nav-right{display:flex;align-items:center;gap:16px;}
.nav-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:42px;
  padding:0 24px;
  border-radius:var(--radius-btn);
  background:var(--brand);
  color:#14100C;
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  border:1px solid var(--brand);
  transition:background-color .22s ease,color .22s ease,border-color .22s ease,transform .12s ease;
}
.nav-cta:hover{
  background:var(--ink-900);
  color:var(--brand);
  border-color:var(--brand);
}
.nav-cta:active{transform:scale(.98);}
.burger{
  display:none;
  width:42px;height:42px;
  border-radius:var(--radius-btn-2);
  border:1px solid var(--line);
  position:relative;
}
.burger span{
  position:absolute;
  left:12px;
  width:18px;height:2px;
  background:var(--text-1);
  transition:transform .25s ease,opacity .25s ease,top .25s ease;
}
.burger span:nth-child(1){top:14px;}
.burger span:nth-child(2){top:20px;}
.burger span:nth-child(3){top:26px;}
.burger.open span:nth-child(1){top:20px;transform:rotate(45deg);}
.burger.open span:nth-child(2){opacity:0;}
.burger.open span:nth-child(3){top:20px;transform:rotate(-45deg);}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  padding:170px 0 96px;
  background-color:var(--ink-900);
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center 30%;
  opacity:.42;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,var(--ink-900) 8%,rgba(10,11,13,.78) 46%,rgba(10,11,13,.35) 100%),
    linear-gradient(180deg,rgba(10,11,13,.86) 0%,rgba(10,11,13,.62) 44%,var(--ink-900) 100%);
}
.page-hero .container{position:relative;z-index:2;}
.eyebrow{
  display:flex;
  align-items:center;
  gap:14px;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--text-3);
  margin-bottom:24px;
}
.eyebrow::before{
  content:"";
  width:24px;
  height:1px;
  background:var(--brand-2);
  flex-shrink:0;
}
.page-hero h1{
  font-size:clamp(38px,5.6vw,64px);
  font-weight:800;
  line-height:1.06;
  letter-spacing:-.02em;
  max-width:760px;
}
.page-hero h1 em{
  font-style:normal;
  color:var(--brand);
}
.hero-lead{
  margin-top:24px;
  max-width:640px;
  font-size:17px;
  line-height:1.85;
  color:var(--text-2);
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  margin-top:32px;
  font-size:13px;
  color:var(--text-3);
  letter-spacing:.06em;
}
.hero-tags span{display:inline-flex;align-items:center;gap:14px;}
.hero-tags span::after{
  content:"";
  width:1px;height:12px;
  background:var(--line-strong);
}
.hero-tags span:last-child::after{display:none;}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:36px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:50px;
  padding:0 30px;
  border-radius:var(--radius-btn);
  font-size:16px;
  font-weight:600;
  letter-spacing:.02em;
  border:1px solid transparent;
  transition:background-color .22s ease,color .22s ease,border-color .22s ease,transform .12s ease;
}
.btn:active{transform:scale(.98);}
.btn-primary{
  background:var(--brand);
  color:#14100C;
  border-color:var(--brand);
}
.btn-primary:hover{
  background:var(--ink-900);
  color:var(--brand);
  border-color:var(--brand);
}
.btn-ghost{
  background:transparent;
  color:var(--text-1);
  border-color:var(--text-1);
}
.btn-ghost:hover{
  background:var(--text-1);
  color:var(--ink-900);
  border-color:var(--text-1);
}
.btn-text{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  color:var(--text-2);
  border-bottom:1px solid var(--line-strong);
  padding-bottom:2px;
  transition:color .2s ease,border-color .2s ease;
}
.btn-text:hover{color:var(--brand-2);border-color:var(--brand-2);}
.btn-text:hover .arrow{transform:translateX(4px);}
.arrow{display:inline-block;transition:transform .22s ease;}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
  padding:24px 0 0;
  border-top:1px solid var(--line);
  margin-top:72px;
}
.breadcrumb a{color:var(--text-3);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--text-1);}
.breadcrumb .sep{color:var(--line-strong);}
.breadcrumb .current{color:var(--text-2);}

/* ---------- sections ---------- */
.section{padding:112px 0;}
.section.tight{padding:80px 0;}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  padding-bottom:24px;
  border-bottom:1px solid var(--line);
  margin-bottom:56px;
}
.section-title{
  display:flex;
  align-items:baseline;
  gap:12px;
  flex-wrap:wrap;
}
.section-title .num{
  font-family:var(--font-num);
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--text-3);
}
.section-title h2{
  font-size:clamp(24px,3vw,38px);
  font-weight:700;
  line-height:1.2;
  letter-spacing:-.01em;
}
.section-sub{
  margin-top:14px;
  max-width:620px;
  font-size:15px;
  color:var(--text-2);
}
.section-head .head-side{
  font-size:14px;
  color:var(--text-3);
}

/* ---------- device grid ---------- */
.device-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(250px,1fr));
  gap:24px;
}
.device-card{
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:transform .3s cubic-bezier(.2,.7,.2,1),border-color .3s ease,box-shadow .3s ease;
}
.device-card:hover{
  transform:translateY(-4px);
  border-color:var(--brand);
  box-shadow:0 12px 30px rgba(255,106,31,.12);
}
.device-card .thumb{
  position:relative;
  aspect-ratio:16 / 10;
  overflow:hidden;
  background:var(--ink-600);
}
.device-card .thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s cubic-bezier(.2,.7,.2,1);
}
.device-card:hover .thumb img{transform:scale(1.04);}
.device-card .thumb::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(16,18,22,0) 42%,rgba(10,11,13,.82) 100%);
  transition:background .3s ease;
}
.device-card:hover .thumb::after{
  background:linear-gradient(180deg,rgba(16,18,22,.12) 26%,rgba(10,11,13,.92) 100%);
}
.badge{
  position:absolute;
  top:12px;left:12px;
  z-index:2;
  padding:3px 10px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--brand-2);
  border:1px solid var(--brand-2);
  border-radius:999px;
  background:rgba(10,11,13,.5);
}
.device-card .body{
  padding:20px 20px 24px;
}
.device-card h3{
  font-size:18px;
  font-weight:600;
  line-height:1.4;
  transition:color .22s ease;
}
.device-card:hover h3{color:var(--brand);}
.device-card p{
  margin-top:10px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
}
.meta-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin-top:16px;
  font-size:13px;
  color:var(--text-3);
  font-family:var(--font-num);
  letter-spacing:.02em;
}
.meta-row .dot{width:3px;height:3px;border-radius:50%;background:var(--line-strong);}

/* ---------- timeline ---------- */
.timeline-block{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,380px);
  gap:64px;
  align-items:start;
}
.timeline{
  position:relative;
  padding-left:40px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:9px;top:10px;bottom:10px;
  width:1px;
  background:var(--line);
}
.tl-item{
  position:relative;
  padding:0 0 44px 0;
}
.tl-item:last-child{padding-bottom:0;}
.tl-dot{
  position:absolute;
  left:-40px;top:6px;
  width:19px;height:19px;
  border-radius:50%;
  border:1px solid var(--line-strong);
  background:var(--ink-900);
  transition:border-color .25s ease,background-color .25s ease,box-shadow .25s ease;
}
.tl-dot::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  width:7px;height:7px;
  margin:-3.5px 0 0 -3.5px;
  border-radius:50%;
  background:var(--line-strong);
  transition:background-color .25s ease;
}
.tl-item:hover .tl-dot,
.tl-item.is-active .tl-dot{
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(255,106,31,.12);
}
.tl-item:hover .tl-dot::after,
.tl-item.is-active .tl-dot::after{background:var(--brand);}
.tl-num{
  font-family:var(--font-num);
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--text-3);
  transition:color .25s ease;
}
.tl-item:hover .tl-num{color:var(--brand);}
.tl-body h3{
  margin-top:8px;
  font-size:19px;
  font-weight:600;
  line-height:1.4;
}
.tl-body p{
  margin-top:10px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.8;
  max-width:640px;
}
.tl-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:16px;
}
.tl-tags li{
  font-size:12px;
  letter-spacing:.06em;
  color:var(--text-3);
  border:1px solid var(--line);
  border-radius:999px;
  padding:4px 12px;
}
.timeline-aside{
  position:sticky;
  top:110px;
}
.aside-card{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--ink-800);
}
.aside-card .pic{
  aspect-ratio:3 / 4;
  overflow:hidden;
  position:relative;
}
.aside-card .pic img{width:100%;height:100%;object-fit:cover;}
.aside-card .pic .badge{top:14px;left:14px;}
.aside-card .txt{padding:24px;}
.aside-card h3{font-size:18px;font-weight:600;line-height:1.4;}
.aside-card p{margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.75;}
.aside-list{
  margin-top:20px;
  border-top:1px solid var(--line);
}
.aside-list li{
  display:flex;
  align-items:flex-start;
  gap:12px;
  padding:12px 0;
  border-bottom:1px solid var(--line);
  font-size:14px;
  color:var(--text-2);
}
.aside-list li:last-child{border-bottom:0;}
.aside-list .k{
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--text-3);
  min-width:44px;
}

/* ---------- quality split ---------- */
.split{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:64px;
  align-items:center;
}
.split .visual{
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  position:relative;
}
.split .visual img{
  width:100%;
  aspect-ratio:16 / 10;
  object-fit:cover;
  transition:transform .5s cubic-bezier(.2,.7,.2,1);
}
.split .visual:hover img{transform:scale(1.04);}
.split .visual::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,11,13,0) 50%,rgba(10,11,13,.72) 100%);
}
.quality-list{
  margin-top:32px;
  border-top:1px solid var(--line);
}
.quality-list li{
  display:grid;
  grid-template-columns:88px minmax(0,1fr);
  gap:24px;
  padding:20px 0;
  border-bottom:1px solid var(--line);
}
.quality-list .q-key{
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--text-3);
  padding-top:4px;
}
.quality-list h3{font-size:17px;font-weight:600;line-height:1.45;}
.quality-list p{margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.75;}

/* ---------- stats band ---------- */
.stats-band{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stat-item{
  padding:40px 28px;
  border-right:1px solid var(--line);
}
.stat-item:last-child{border-right:0;}
.stat-item .v{
  font-family:var(--font-num);
  font-size:clamp(38px,4.4vw,56px);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1;
  color:var(--text-3);
  transition:color .3s ease;
}
.stat-item:hover .v{color:var(--brand);}
.stat-item .k{
  margin-top:14px;
  font-size:14px;
  color:var(--text-2);
}
.stat-item .d{
  margin-top:6px;
  font-size:13px;
  color:var(--text-3);
}

/* ---------- faq ---------- */
.faq-wrap{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.35fr);
  gap:64px;
  align-items:start;
}
.faq-wrap .faq-intro p{
  margin-top:16px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.85;
  max-width:380px;
}
.faq-wrap .faq-intro a{
  display:inline-block;
  margin-top:20px;
}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:24px;
  width:100%;
  text-align:left;
  padding:22px 0 22px 0;
  font-size:17px;
  font-weight:600;
  color:var(--text-2);
  line-height:1.5;
  border-left:2px solid transparent;
  padding-left:0;
  transition:color .25s ease,border-color .25s ease,padding-left .25s ease;
}
.faq-q:hover{color:var(--text-1);}
.faq-item.open .faq-q{
  color:var(--text-1);
  border-left-color:var(--brand);
  padding-left:18px;
}
.faq-icon{
  position:relative;
  flex-shrink:0;
  width:16px;height:16px;
  margin-top:5px;
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--text-3);
  transition:transform .25s ease,background-color .25s ease;
}
.faq-icon::before{left:0;top:7px;width:16px;height:1.5px;}
.faq-icon::after{left:7px;top:0;width:1.5px;height:16px;}
.faq-item.open .faq-icon::after{transform:rotate(90deg);opacity:0;}
.faq-item.open .faq-icon::before{background:var(--brand);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
}
.faq-a p{
  padding:0 0 24px 18px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
  max-width:640px;
}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  background:var(--ink-800);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  opacity:.16;
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(38,42,51,.5) 1px,transparent 1px),
    linear-gradient(90deg,rgba(38,42,51,.5) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.35;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.6),rgba(0,0,0,0));
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.6),rgba(0,0,0,0));
}
.cta-inner{
  position:relative;
  z-index:2;
  padding:96px 0;
  max-width:720px;
}
.cta-inner h2{
  font-size:clamp(26px,3.4vw,42px);
  font-weight:700;
  line-height:1.2;
  letter-spacing:-.01em;
}
.cta-inner p{
  margin-top:18px;
  font-size:16px;
  color:var(--text-2);
  line-height:1.85;
}
.cta-inner .hero-actions{margin-top:34px;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink-900);
  border-top:1px solid var(--line);
  padding:72px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:48px;
  padding-bottom:56px;
}
.footer-brand p{
  margin-top:18px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.8;
  max-width:340px;
}
.footer-col h3{
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--text-3);
  margin-bottom:18px;
}
.footer-col ul li{margin-bottom:12px;}
.footer-link{
  position:relative;
  display:inline-block;
  font-size:14px;
  color:var(--text-2);
  transition:color .2s ease;
}
.footer-link::after{
  content:"";
  position:absolute;
  left:0;bottom:-3px;
  width:100%;height:1px;
  background:var(--brand-2);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s ease;
}
.footer-link:hover{color:var(--text-1);}
.footer-link:hover::after{transform:scaleX(1);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:22px 0;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{
  color:var(--text-3);
  border-bottom:1px solid var(--line-strong);
  transition:color .2s ease,border-color .2s ease;
}
.footer-bottom a:hover{color:var(--text-1);border-color:var(--brand);}

/* ---------- reveal ---------- */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1);
}
.reveal.in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 24px;}
  .nav-links{gap:18px;}
  .nav-links a{font-size:15px;}
  .timeline-block{grid-template-columns:1fr;gap:48px;}
  .timeline-aside{position:static;}
  .split{grid-template-columns:1fr;gap:40px;}
  .faq-wrap{grid-template-columns:1fr;gap:40px;}
  .stats-band{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(2n){border-right:0;}
  .stat-item{border-bottom:1px solid var(--line);}
  .stat-item:nth-last-child(-n+2){border-bottom:0;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:768px){
  .page-hero{padding:130px 0 72px;}
  .section{padding:72px 0;}
  .section-head{margin-bottom:40px;}
  .breadcrumb{margin-top:48px;}
  .cta-inner{padding:72px 0;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  .nav-inner{height:68px;}
  .nav-links{
    position:fixed;
    top:0;right:0;
    width:88%;
    height:100vh;
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:96px 28px 40px;
    background:var(--ink-800);
    border-left:1px solid var(--line);
    transform:translateX(100%);
    transition:transform .34s cubic-bezier(.2,.7,.2,1);
    overflow-y:auto;
    z-index:90;
  }
  .nav-links.open{transform:translateX(0);}
  .nav-links a{
    width:100%;
    font-size:17px;
    padding:16px 0;
    border-bottom:1px solid var(--line);
    opacity:0;
    transform:translateX(12px);
    transition:opacity .3s ease,transform .3s ease,color .2s ease;
  }
  .nav-links.open a{opacity:1;transform:none;}
  .nav-links.open a:nth-child(1){transition-delay:.04s;}
  .nav-links.open a:nth-child(2){transition-delay:.08s;}
  .nav-links.open a:nth-child(3){transition-delay:.12s;}
  .nav-links.open a:nth-child(4){transition-delay:.16s;}
  .nav-links.open a:nth-child(5){transition-delay:.20s;}
  .nav-links a.active::before{display:none;}
  .nav-links a.active{padding-left:14px;border-left:2px solid var(--brand);}
  .burger{display:block;z-index:95;}
  .nav-cta{display:none;}
  .brand-sub{font-size:12px;}
  .hero-tags{gap:10px;font-size:12px;}
  .hero-tags span{gap:10px;}
  .btn{width:100%;}
  .hero-actions{width:100%;}
  .device-grid{grid-template-columns:repeat(2,1fr);gap:16px;}
  .device-card .body{padding:16px 14px 18px;}
  .device-card h3{font-size:16px;}
  .device-card p{font-size:13px;}
  .stats-band{grid-template-columns:1fr;}
  .stat-item{border-right:0;padding:28px 0;}
  .stat-item:nth-last-child(-n+2){border-bottom:1px solid var(--line);}
  .stat-item:last-child{border-bottom:0;}
  .quality-list li{grid-template-columns:1fr;gap:8px;}
  .timeline{padding-left:32px;}
  .tl-dot{left:-32px;}
  .footer-grid{grid-template-columns:1fr;gap:36px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
  --ink-900:#0A0B0D;
  --ink-800:#101216;
  --ink-700:#171A20;
  --ink-600:#1F232B;
  --line:#262A33;
  --line-strong:#333844;
  --text-1:#F0EDE7;
  --text-2:#A6A19A;
  --text-3:#6C6862;
  --brand:#FF6A1F;
  --brand-2:#2FD3B5;
  --paper:#F5F1E9;
  --paper-ink:#1A1B1F;
  --ok:#3FBF7F;
  --warn:#E4B33C;
  --err:#E5533D;
  --empty:#2A2E36;
  --radius-poster:14px;
  --radius-img:12px;
  --radius-pill:999px;
  --radius-sq:10px;
  --container:1280px;
  --nav-h:72px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -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{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand);color:var(--ink-900)}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease;
}
.site-header.is-scrolled{
  background:rgba(10,11,13,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;height:var(--nav-h);gap:24px}
.brand{display:inline-flex;align-items:center;gap:8px;flex-shrink:0}
.brand-mark{
  font-family:Archivo,Inter,"PingFang SC",system-ui,sans-serif;
  font-size:22px;font-weight:900;letter-spacing:-.02em;color:var(--text-1);line-height:1;
}
.brand-divider{width:1px;height:16px;background:var(--line-strong);display:inline-block}
.brand-sub{font-size:13px;color:var(--text-2);white-space:nowrap;line-height:1}
.nav-links{display:flex;align-items:center;gap:30px;margin-left:auto}
.nav-links a{
  position:relative;font-size:16px;color:var(--text-2);padding:6px 0;
  transition:color .22s ease;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.nav-links a:hover{color:var(--text-1)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--text-1)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active::before{
  content:"";position:absolute;left:50%;bottom:-9px;width:4px;height:4px;margin-left:-2px;
  border-radius:50%;background:var(--brand);
}
.nav-right{display:flex;align-items:center;gap:16px;margin-left:8px}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand);color:var(--ink-900);
  border-radius:var(--radius-pill);padding:10px 22px;
  font-size:15px;font-weight:600;line-height:1;
  transition:background .25s ease,color .25s ease,box-shadow .25s ease,transform .2s ease;
}
.nav-cta:hover{background:var(--ink-900);color:var(--brand);box-shadow:inset 0 0 0 1px var(--brand)}
.nav-cta:active{transform:scale(.98)}
.burger{display:none;width:40px;height:40px;position:relative;flex-shrink:0;border-radius:var(--radius-sq)}
.burger span{
  position:absolute;left:10px;width:20px;height:2px;background:var(--text-1);
  border-radius:2px;transition:transform .28s var(--ease),opacity .2s ease;
}
.burger span:nth-child(1){top:14px}
.burger span:nth-child(2){top:19px}
.burger span:nth-child(3){top:24px}
body.nav-open .burger span:nth-child(1){transform:translateY(5px) rotate(45deg)}
body.nav-open .burger span:nth-child(2){opacity:0}
body.nav-open .burger span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  min-height:64vh;display:flex;align-items:flex-end;
  padding:calc(var(--nav-h) + 88px) 0 72px;
  border-bottom:1px solid var(--line);
}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(10,11,13,.95) 0%,rgba(10,11,13,.80) 46%,rgba(10,11,13,.40) 100%),
    linear-gradient(0deg,rgba(10,11,13,1) 0%,rgba(10,11,13,0) 58%);
}
.hero-inner{position:relative;max-width:780px}
.eyebrow{
  display:inline-flex;align-items:center;gap:12px;
  font-size:12px;letter-spacing:.08em;color:var(--text-3);line-height:1;
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--brand-2)}
.hero h1{
  margin:24px 0 20px;
  font-size:clamp(34px,4.6vw,62px);
  font-weight:800;line-height:1.1;letter-spacing:-.02em;color:var(--text-1);
}
.hero-sub{font-size:clamp(16px,1.6vw,19px);color:var(--text-2);max-width:620px;line-height:1.7}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.hero-tags{display:flex;flex-wrap:wrap;align-items:center;margin-top:32px}
.hero-tags li{
  font-size:13px;letter-spacing:.06em;color:var(--text-3);
  padding:0 16px;line-height:1.4;
}
.hero-tags li:first-child{padding-left:0}
.hero-tags li+li{border-left:1px solid var(--line-strong)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  border-radius:var(--radius-pill);padding:14px 30px;
  font-size:15px;font-weight:600;line-height:1;
  transition:background .25s ease,color .25s ease,box-shadow .25s ease,transform .2s ease;
  white-space:nowrap;
}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--brand);color:var(--ink-900)}
.btn-primary:hover{background:var(--ink-900);color:var(--brand);box-shadow:inset 0 0 0 1px var(--brand)}
.btn-ghost{background:transparent;color:var(--text-1);box-shadow:inset 0 0 0 1px var(--text-1)}
.btn-ghost:hover{background:var(--text-1);color:var(--ink-900)}
.btn-square{border-radius:var(--radius-sq)}
.link-more{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);
  transition:color .22s ease;
}
.link-more .arrow{transition:transform .25s var(--ease)}
.link-more:hover{color:var(--brand-2)}
.link-more:hover .arrow{transform:translateX(4px)}

/* ---------- breadcrumb ---------- */
.crumb-wrap{padding-top:28px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-3)}
.breadcrumb a{transition:color .2s ease}
.breadcrumb a:hover{color:var(--text-1)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .current{color:var(--text-2)}

/* ---------- section ---------- */
.section{padding:104px 0;border-bottom:1px solid var(--line)}
.section.tight{padding:64px 0}
.section:last-of-type{border-bottom:0}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:32px;margin-bottom:56px;flex-wrap:wrap;
}
.section-title{
  display:flex;align-items:baseline;gap:12px;
  font-size:clamp(24px,3vw,38px);font-weight:700;line-height:1.2;
  letter-spacing:-.01em;color:var(--text-1);
}
.section-num{
  font-family:Archivo,Inter,system-ui,sans-serif;
  font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--text-3);
}
.section-desc{margin-top:14px;font-size:15px;color:var(--text-2);max-width:620px;line-height:1.75}

/* ---------- stagger cards ---------- */
.stagger{display:grid;grid-template-columns:repeat(2,1fr);gap:64px 48px;align-items:start}
.stagger > .reveal:nth-child(even){margin-top:48px}
.stagger-item{
  display:flex;flex-direction:column;
  background:var(--ink-800);border:1px solid var(--line);
  border-radius:var(--radius-poster);overflow:hidden;
  transition:border-color .3s ease,transform .4s var(--ease),box-shadow .4s ease;
}
.stagger-item:hover{
  border-color:var(--brand);transform:translateY(-4px);
  box-shadow:0 12px 30px rgba(255,106,31,.12);
}
.stagger > .reveal:nth-child(even) .stagger-item{flex-direction:column-reverse}
.media{position:relative;overflow:hidden;aspect-ratio:16/10;background:var(--ink-700)}
.media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.stagger-item:hover .media img{transform:scale(1.04)}
.media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(0deg,rgba(10,11,13,.78) 0%,rgba(10,11,13,0) 62%);
  opacity:0;transition:opacity .4s ease;
}
.stagger-item:hover .media::after{opacity:1}
.badge{
  position:absolute;top:14px;left:14px;z-index:2;
  font-size:12px;letter-spacing:.06em;color:var(--brand-2);
  border:1px solid var(--brand-2);background:rgba(10,11,13,.55);
  border-radius:var(--radius-pill);padding:5px 12px;line-height:1.2;
  -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
}
.card-body{padding:30px 30px 32px}
.card-body h3{font-size:19px;font-weight:600;line-height:1.4;color:var(--text-1);transition:color .25s ease}
.stagger-item:hover .card-body h3{color:var(--brand)}
.card-body p{margin-top:14px;font-size:15px;line-height:1.78;color:var(--text-2)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.tag{
  font-size:12px;color:var(--text-3);border:1px solid var(--line);
  border-radius:var(--radius-pill);padding:5px 12px;line-height:1.2;
  transition:border-color .22s ease,color .22s ease;
}
.stagger-item:hover .tag{border-color:var(--line-strong);color:var(--text-2)}

/* ---------- databar ---------- */
.databar{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.databar li{padding:36px 28px;border-left:1px solid var(--line)}
.databar li:first-child{border-left:0;padding-left:0}
.databar .num{
  font-family:Archivo,Inter,system-ui,sans-serif;
  font-size:clamp(36px,4vw,56px);font-weight:900;line-height:1;
  letter-spacing:-.03em;color:var(--text-3);
  font-variant-numeric:tabular-nums;
  transition:color .3s ease;
}
.databar li:hover .num{color:var(--brand)}
.databar .num small{font-size:.42em;font-weight:700;margin-left:6px;letter-spacing:0}
.databar .lab{margin-top:14px;font-size:14px;color:var(--text-2);line-height:1.6}

/* ---------- path ---------- */
.path{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:24px}
.path::before{content:"";position:absolute;left:0;right:0;top:14px;height:1px;background:var(--line)}
.path li{position:relative;padding-top:52px}
.path li::before{
  content:"";position:absolute;top:8px;left:0;width:13px;height:13px;border-radius:50%;
  background:var(--ink-900);border:1px solid var(--line-strong);
  transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.path li:hover::before{background:var(--brand);border-color:var(--brand);box-shadow:0 0 0 5px rgba(255,106,31,.14)}
.path .step-no{
  font-family:Archivo,Inter,system-ui,sans-serif;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--text-3);
}
.path h3{margin-top:10px;font-size:17px;font-weight:600;color:var(--text-1);line-height:1.4}
.path p{margin-top:10px;font-size:14px;line-height:1.7;color:var(--text-2)}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:1fr 1.45fr;gap:72px;align-items:start}
.faq-aside .link-more{margin-top:24px}
.faq-item{position:relative;border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--brand);
  transform:scaleY(0);transform-origin:top;transition:transform .3s var(--ease);
}
.faq-item.open::before{transform:scaleY(1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  text-align:left;padding:24px 0;font-size:17px;font-weight:600;line-height:1.5;
  color:var(--text-2);transition:color .25s ease,padding-left .25s ease;
}
.faq-item.open .faq-q{color:var(--text-1);padding-left:20px}
.faq-q:hover{color:var(--text-1)}
.faq-icon{position:relative;width:14px;height:14px;flex-shrink:0}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--text-2);transition:transform .25s var(--ease),background .25s ease,opacity .2s ease}
.faq-icon::before{left:0;top:6.5px;width:14px;height:1px}
.faq-icon::after{left:6.5px;top:0;width:1px;height:14px}
.faq-item.open .faq-icon::before{background:var(--brand)}
.faq-item.open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 0 26px;font-size:15px;line-height:1.8;color:var(--text-2)}
.faq-item.open .faq-a p{padding-left:20px}

/* ---------- cta ---------- */
.cta-section{position:relative;overflow:hidden;background:var(--ink-800);border-top:1px solid var(--line)}
.cta-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:.16}
.cta-section::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.16;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;
}
.cta-inner{position:relative;z-index:2;padding:104px 0;max-width:720px}
.cta-inner h2{
  font-size:clamp(26px,3.2vw,42px);font-weight:700;line-height:1.2;
  letter-spacing:-.01em;color:var(--text-1);
}
.cta-inner p{margin-top:18px;font-size:16px;color:var(--text-2);line-height:1.8}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-top:36px}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--ink-900);padding:72px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:48px}
.footer-brand p{margin-top:20px;font-size:14px;line-height:1.8;color:var(--text-3);max-width:340px}
.footer-col h3{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--text-3);margin-bottom:18px}
.footer-col li+li{margin-top:12px}
.footer-link{position:relative;font-size:14px;color:var(--text-2);transition:color .22s ease;display:inline-block}
.footer-link::after{
  content:"";position:absolute;left:0;bottom:-3px;width:100%;height:1px;background:var(--brand-2);
  transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.footer-link:hover{color:var(--text-1)}
.footer-link:hover::after{transform:scaleX(1)}
.footer-bottom{
  margin-top:56px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);text-decoration:underline;text-underline-offset:3px;transition:color .2s ease}
.footer-bottom a:hover{color:var(--text-2)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 24px}
  .stagger{grid-template-columns:1fr;gap:40px}
  .stagger > .reveal:nth-child(even){margin-top:0}
  .stagger > .reveal:nth-child(even) .stagger-item{flex-direction:column}
  .databar{grid-template-columns:repeat(2,1fr)}
  .databar li{padding:28px 20px}
  .databar li:nth-child(odd){border-left:0;padding-left:0}
  .databar li:nth-child(n+3){border-top:1px solid var(--line)}
  .faq-layout{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:40px}
  .path{grid-template-columns:1fr;gap:0}
  .path::before{left:6px;right:auto;top:0;bottom:0;width:1px;height:auto}
  .path li{padding:18px 0 18px 34px}
  .path li::before{top:24px;left:0}
}
@media (max-width:900px){
  .burger{display:block}
  .nav-links{
    position:fixed;top:var(--nav-h);right:0;bottom:0;width:88%;max-width:360px;
    display:flex;flex-direction:column;align-items:flex-start;gap:0;
    background:var(--ink-800);border-left:1px solid var(--line);
    padding:24px 24px 48px;margin-left:0;overflow-y:auto;
    transform:translateX(100%);transition:transform .32s var(--ease);
  }
  body.nav-open .nav-links{transform:translateX(0);box-shadow:-24px 0 60px rgba(0,0,0,.5)}
  .nav-links a{
    width:100%;padding:16px 0;font-size:17px;border-bottom:1px solid var(--line);
    opacity:0;transform:translateX(12px);
  }
  .nav-links a::after{display:none}
  .nav-links a.active{color:var(--brand)}
  .nav-links a.active::before{display:none}
  body.nav-open .nav-links a{opacity:1;transform:none;transition:opacity .3s ease,transform .3s var(--ease)}
  body.nav-open .nav-links a:nth-child(1){transition-delay:40ms}
  body.nav-open .nav-links a:nth-child(2){transition-delay:80ms}
  body.nav-open .nav-links a:nth-child(3){transition-delay:120ms}
  body.nav-open .nav-links a:nth-child(4){transition-delay:160ms}
  body.nav-open .nav-links a:nth-child(5){transition-delay:200ms}
  .nav-cta{display:none}
  .nav-right{margin-left:auto}
}
@media (max-width:640px){
  .container{padding:0 20px}
  .brand-sub{display:none}
  .brand-divider{display:none}
  .hero{min-height:76vh;padding:calc(var(--nav-h) + 64px) 0 56px}
  .hero h1{margin:20px 0 16px}
  .hero-actions{gap:12px}
  .btn{width:100%}
  .hero-actions .btn{flex:1 1 100%}
  .section{padding:64px 0}
  .section.tight{padding:48px 0}
  .section-head{margin-bottom:36px;gap:16px}
  .databar{grid-template-columns:1fr}
  .databar li{padding:24px 0;border-left:0}
  .databar li+li{border-top:1px solid var(--line)}
  .card-body{padding:24px 22px 26px}
  .cta-inner{padding:72px 0}
  .cta-actions{gap:16px}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .footer-bottom{flex-direction:column;gap:10px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}