/* roulang page: index */
:root{
  --brand-600:#1D5BD8; --brand-700:#1748AC; --brand-50:#E8EFFD;
  --accent-500:#FF7A1A; --accent-50:#FFF1E6;
  --teal-500:#0FB5A6; --warn:#E5484D;
  --bg:#F5F7FB; --surface:#FFFFFF; --line:#E2E8F4; --line-soft:#EEF2F9;
  --ink:#16203A; --muted:#5C6B87; --faint:#8A97AE; --footer-bg:#0F1A33;
  --r-sm:10px; --r-md:16px; --r-lg:24px;
  --sh-sm:0 1px 2px rgba(16,32,64,.04), 0 4px 14px rgba(16,32,64,.05);
  --sh-md:0 6px 24px rgba(16,32,64,.08);
  --sh-lg:0 14px 36px rgba(16,32,64,.12);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
.num{font-variant-numeric:tabular-nums;}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px;}
@media (min-width:768px){.container-x{padding-left:32px;padding-right:32px;}}
.section{padding-top:56px;padding-bottom:56px;}
@media (min-width:768px){.section{padding-top:88px;padding-bottom:88px;}}
.section-tight{padding-top:40px;padding-bottom:40px;}
@media (min-width:768px){.section-tight{padding-top:64px;padding-bottom:64px;}}

h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
.h1-hero{font-size:31px;line-height:1.18;font-weight:800;letter-spacing:-.02em;}
@media (min-width:768px){.h1-hero{font-size:44px;}}
@media (min-width:1024px){.h1-hero{font-size:52px;}}
.h2-sec{font-size:23px;line-height:1.3;font-weight:700;}
@media (min-width:768px){.h2-sec{font-size:32px;}}
.lead{color:var(--muted);font-size:16px;line-height:1.75;}
.sub{color:var(--muted);font-size:14px;line-height:1.7;}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line);transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-sm);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px;}
@media (min-width:768px){.nav-inner{height:72px;}}
.logo{display:flex;align-items:center;gap:10px;min-height:32px;}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  background:linear-gradient(140deg,var(--brand-600),#3E7BEA);
  display:flex;align-items:center;justify-content:center;color:#fff;
}
.logo-text{font-size:16px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}
.logo-text span{color:var(--brand-600);}
.nav-links{display:none;align-items:center;gap:6px;}
@media (min-width:1024px){.nav-links{display:flex;}}
.nav-link{
  position:relative;padding:8px 12px;border-radius:10px;font-size:15px;font-weight:600;color:var(--ink);
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--brand-600);}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;background:var(--brand-600);
}
.nav-pill{background:var(--brand-50);color:var(--brand-600);padding:8px 14px;border-radius:999px;}
.nav-pill:hover{background:#DBE6FC;color:var(--brand-700);}
.nav-actions{display:none;align-items:center;gap:10px;}
@media (min-width:768px){.nav-actions{display:flex;}}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--sh-lg);}
.btn-primary:active{transform:translateY(1px);}
.btn-outline{background:#fff;color:var(--brand-600);border-color:var(--brand-600);}
.btn-outline:hover{background:var(--brand-50);transform:translateY(-1px);}
.btn-accent{background:var(--accent-500);color:#fff;}
.btn-accent:hover{background:#EA6A0C;transform:translateY(-1px);box-shadow:var(--sh-lg);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}
.btn-lg{height:52px;padding:0 28px;}
.hamburger{
  display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink);
}
@media (min-width:768px){.hamburger{display:none;}}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;background:#fff;z-index:90;
  transform:translateX(102%);transition:transform .28s ease;box-shadow:var(--sh-lg);
  display:flex;flex-direction:column;padding:20px;
}
.drawer.open{transform:translateX(0);}
.drawer-mask{position:fixed;inset:0;background:rgba(15,26,51,.42);z-index:80;opacity:0;pointer-events:none;transition:opacity .25s ease;}
.drawer-mask.open{opacity:1;pointer-events:auto;}
.drawer-links{display:flex;flex-direction:column;gap:4px;margin-top:18px;}
.drawer-link{padding:13px 14px;border-radius:12px;font-weight:600;color:var(--ink);}
.drawer-link:hover,.drawer-link.active{background:var(--brand-50);color:var(--brand-600);}
.drawer-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);}

/* badge & cards */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:12px;font-weight:600;background:var(--brand-50);color:var(--brand-600);line-height:1.6;
}
.badge-accent{background:var(--accent-50);color:var(--accent-500);}
.badge-teal{background:#E4F7F5;color:#0A8F84;}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-sm);transition:box-shadow .2s ease,transform .2s ease;
}
.card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);}
.card-cover{overflow:hidden;border-radius:14px;background:var(--line-soft);}
.card-cover img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s ease;}
.card:hover .card-cover img{transform:scale(1.03);}
.clamp2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.link-arrow{color:var(--brand-600);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.link-arrow:hover{color:var(--brand-700);}
.link-arrow svg{transition:transform .2s ease;}
.link-arrow:hover svg{transform:translateX(3px);}

/* hero */
.hero{background:linear-gradient(180deg,#FFFFFF 0%,#F5F7FB 100%);padding-top:40px;padding-bottom:52px;}
@media (min-width:768px){.hero{padding-top:64px;padding-bottom:88px;}}
.hero-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:center;}
@media (min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:48px;}}
.hero-visual{position:relative;border-radius:var(--r-lg);overflow:hidden;height:236px;background:var(--line-soft);}
@media (min-width:768px){.hero-visual{height:320px;}}
@media (min-width:1024px){.hero-visual{height:420px;}}
.hero-visual img{width:100%;height:100%;object-fit:cover;}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(160deg,rgba(29,91,216,.14),rgba(29,91,216,.04) 60%,rgba(255,122,26,.10));}
.hero-float{
  position:absolute;left:16px;bottom:16px;right:16px;background:rgba(255,255,255,.94);
  border-radius:14px;padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:12px;
  box-shadow:var(--sh-sm);
}
.stat-cell{padding:14px 8px;border-radius:14px;background:#fff;border:1px solid var(--line);text-align:center;}
.stat-num{font-size:22px;font-weight:800;color:var(--brand-600);}
@media (min-width:768px){.stat-num{font-size:26px;}}
.stat-label{font-size:12px;color:var(--faint);margin-top:2px;}

/* steps */
.steps{display:grid;grid-template-columns:1fr;gap:0;}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,1fr);gap:24px;}}
.step{position:relative;padding:0 0 26px 46px;}
@media (min-width:1024px){.step{padding:0 0 0 0;}}
.step-num{font-size:38px;font-weight:800;color:var(--brand-50);line-height:1;letter-spacing:-.03em;}
@media (min-width:1024px){.step-num{color:var(--brand-50);}}
.step:not(:last-child)::before{
  content:"";position:absolute;left:14px;top:12px;bottom:0;width:1px;background:var(--line);
}
@media (min-width:1024px){
  .step:not(:last-child)::before{left:auto;right:-12px;top:19px;bottom:auto;width:24px;height:1px;}
}
.step-dot{
  position:absolute;left:8px;top:8px;width:13px;height:13px;border-radius:50%;
  background:#fff;border:2px solid var(--brand-600);
}
@media (min-width:1024px){.step-dot{position:static;display:inline-block;margin-right:8px;}}

/* reward tier */
.tier{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:20px;
  box-shadow:var(--sh-sm);display:flex;flex-direction:column;position:relative;transition:box-shadow .2s ease,transform .2s ease;
}
.tier:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);}
.tier-featured{border:2px solid var(--brand-600);box-shadow:var(--sh-md);}
@media (min-width:1024px){.tier-featured{transform:scale(1.04);}}
.tier-flag{
  position:absolute;top:-13px;right:18px;background:var(--accent-50);color:var(--accent-500);
  font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px;border:1px solid #FFDCC0;
}
.tier-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
.tier-list li{display:flex;gap:9px;font-size:14px;color:var(--muted);line-height:1.7;}
.tier-list svg{flex:none;margin-top:5px;color:var(--teal-500);}
.tier-scroll{display:grid;grid-auto-flow:column;grid-auto-columns:80vw;gap:16px;overflow-x:auto;padding:16px 4px 8px;scrollbar-width:none;}
.tier-scroll::-webkit-scrollbar{display:none;}
@media (min-width:768px){.tier-scroll{grid-auto-columns:44vw;}}
@media (min-width:1024px){.tier-scroll{grid-auto-flow:row;grid-template-columns:repeat(3,1fr);grid-auto-columns:auto;overflow:visible;padding:16px 0 8px;}}

/* progress */
.timeline{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:768px){.timeline{grid-template-columns:repeat(4,1fr);gap:16px;}}
.tl-node{position:relative;padding-left:26px;}
@media (min-width:768px){.tl-node{padding-left:0;padding-top:26px;}}
.tl-dot{position:absolute;left:3px;top:4px;width:13px;height:13px;border-radius:50%;background:#fff;border:2px solid #CBD5E6;}
@media (min-width:768px){.tl-dot{left:0;top:0;}}
.tl-dot.done{background:var(--brand-600);border-color:var(--brand-600);}
.tl-dot.now{background:#fff;border-color:var(--brand-600);animation:pulse 1.8s infinite;}
@media (min-width:768px){
  .tl-node::after{content:"";position:absolute;left:18px;top:6px;right:-16px;height:1px;background:var(--line);}
  .tl-node:last-child::after{display:none;}
}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(255,122,26,.45);}70%{box-shadow:0 0 0 9px rgba(255,122,26,0);}100%{box-shadow:0 0 0 0 rgba(255,122,26,0);}}
.progress-track{height:8px;border-radius:999px;background:var(--brand-50);overflow:hidden;}
.progress-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand-600),var(--teal-500));}

/* faq */
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:none;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 4px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);
}
.faq-q:hover{color:var(--brand-600);}
.faq-q .ico{width:24px;height:24px;flex:none;color:var(--brand-600);transition:transform .25s ease;}
.faq-item.open .faq-q .ico{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a p{padding:0 4px 22px;font-size:15px;line-height:1.8;color:var(--muted);}

/* cta band */
.cta-band{
  background:var(--brand-50);border-radius:var(--r-lg);padding:32px 24px;position:relative;overflow:hidden;
}
@media (min-width:768px){.cta-band{padding:40px 40px;}}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(135deg,rgba(29,91,216,.05) 0 1px,transparent 1px 12px);
  pointer-events:none;
}
.cta-inner{position:relative;display:flex;flex-direction:column;gap:20px;align-items:flex-start;}
@media (min-width:1024px){.cta-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:32px;}}

/* empty */
.empty-box{background:#F7F9FE;border:1px dashed var(--line);border-radius:var(--r-md);padding:40px 24px;text-align:center;}

/* footer */
.site-footer{background:var(--footer-bg);color:#C3CCE0;margin-top:20px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding:56px 0 40px;}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);gap:36px;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.3fr 1fr 1fr 1.1fr;gap:40px;}}
.footer-title{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;}
.footer-link{
  display:inline-flex;align-items:center;gap:0;font-size:14px;color:#AEB9D0;padding:5px 0;
  transition:color .18s ease,padding .18s ease;
}
.footer-link::before{content:"";width:0;height:3px;border-radius:2px;background:var(--brand-600);transition:width .18s ease,margin .18s ease;}
.footer-link:hover{color:#fff;}
.footer-link:hover::before{width:3px;margin-right:8px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);padding:18px 0 26px;
  display:flex;flex-direction:column;gap:8px;font-size:13px;color:#93A0BA;
}
@media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}}
.footer-bottom a{color:#93A0BA;}
.footer-bottom a:hover{color:#fff;}

.reveal{opacity:0;transform:translateY(12px);transition:opacity .24s ease,transform .24s ease;}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation:none!important;}
  html{scroll-behavior:auto;}
}

@media (min-width:640px){
  .news-grid{grid-template-columns:repeat(2,1fr)!important;}
  #app .tier-scroll{grid-auto-columns:44vw;}
}
@media (min-width:1024px){
  .news-grid{grid-template-columns:repeat(3,1fr)!important;}
}
@media (max-width:1023px){
  .tier-featured{transform:none!important;}
}

/* roulang page: article */
:root{
    --brand-600:#1D5BD8;
    --brand-700:#1748AC;
    --brand-50:#E8EFFD;
    --accent-500:#FF7A1A;
    --accent-50:#FFF1E6;
    --teal-500:#0FB5A6;
    --danger:#E5484D;
    --bg:#F5F7FB;
    --surface:#FFFFFF;
    --line:#E2E8F4;
    --line-soft:#EEF2F9;
    --ink:#16203A;
    --muted:#5C6B87;
    --faint:#8A97AE;
    --footer-bg:#0F1A33;
    --r-sm:10px;
    --r-md:16px;
    --r-lg:24px;
    --r-pill:999px;
    --sh-sm:0 1px 2px rgba(16,32,64,.04), 0 4px 14px rgba(16,32,64,.05);
    --sh-md:0 6px 24px rgba(16,32,64,.08);
    --sh-lg:0 14px 36px rgba(16,32,64,.12);
    --sec-y:88px;
  }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
    font-size:16px;
    line-height:1.75;
    font-variant-numeric:tabular-nums;
    -webkit-font-smoothing:antialiased;
  }
  img{ max-width:100%; display:block; border:0; }
  a{ color:inherit; text-decoration:none; transition:color .2s ease, background-color .2s ease, border-color .2s ease; }
  button{ font:inherit; color:inherit; background:none; border:0; cursor:pointer; }
  ul,ol{ margin:0; padding:0; }
  h1,h2,h3,h4,p{ margin:0; }
  :focus-visible{ outline:2px solid var(--brand-600); outline-offset:2px; border-radius:6px; }

  .container-x{ width:100%; max-width:1200px; margin:0 auto; padding:0 32px; }
  .skip-link{
    position:absolute; left:-9999px; top:0; z-index:200;
    background:var(--brand-600); color:#fff; padding:10px 18px; border-radius:0 0 10px 0; font-size:14px;
  }
  .skip-link:focus{ left:0; }

  /* ============ Header ============ */
  .site-header{
    position:sticky; top:0; z-index:60;
    background:rgba(255,255,255,.92);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .25s ease;
  }
  .site-header.is-scrolled{ box-shadow:var(--sh-sm); }
  .header-inner{ display:flex; align-items:center; gap:20px; height:72px; }

  .logo{ display:flex; align-items:center; gap:10px; flex:0 0 auto; }
  .logo-mark{
    width:32px; height:32px; min-height:32px; border-radius:10px;
    background:var(--brand-600); color:#fff;
    display:flex; align-items:center; justify-content:center; flex:0 0 auto;
  }
  .logo-text{
    font-size:19px; font-weight:800; letter-spacing:-.01em; color:var(--ink); white-space:nowrap;
  }
  .logo-text span{ color:var(--brand-600); }

  .nav-links{ display:flex; align-items:center; gap:6px; margin-left:10px; flex:1 1 auto; }
  .nav-link{
    position:relative; display:inline-flex; align-items:center;
    padding:9px 12px; border-radius:var(--r-sm);
    font-size:15px; font-weight:500; color:var(--ink); white-space:nowrap;
    transition:color .2s ease, background-color .2s ease;
  }
  .nav-link:hover{ color:var(--brand-600); }
  .nav-link.active{ color:var(--brand-600); font-weight:600; }
  .nav-link.active::after{
    content:""; position:absolute; left:12px; right:12px; bottom:2px; height:2px;
    border-radius:2px; background:var(--brand-600);
  }
  .nav-pill{ background:var(--brand-50); color:var(--brand-600); font-weight:600; }
  .nav-pill:hover{ background:#D8E4FB; color:var(--brand-700); }

  .header-actions{ display:flex; align-items:center; gap:10px; margin-left:auto; flex:0 0 auto; }

  .nav-toggle{
    display:none; width:44px; height:44px; margin-left:auto;
    align-items:center; justify-content:center; border-radius:var(--r-sm); color:var(--ink);
  }
  .nav-toggle:hover{ background:var(--brand-50); color:var(--brand-600); }

  /* ============ Buttons ============ */
  .btn{
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    height:48px; padding:0 26px; border-radius:12px;
    font-size:15px; font-weight:600; line-height:1; white-space:nowrap;
    border:1px solid transparent; cursor:pointer;
    transition:background-color .2s ease, color .2s ease, box-shadow .2s ease, transform .2s ease, border-color .2s ease;
  }
  .btn-primary{ background:var(--brand-600); color:#fff; box-shadow:var(--sh-sm); }
  .btn-primary:hover{ background:var(--brand-700); transform:translateY(-1px); box-shadow:var(--sh-lg); }
  .btn-primary:active{ transform:translateY(1px); box-shadow:var(--sh-sm); }
  .btn-primary:disabled{ opacity:.6; cursor:not-allowed; transform:none; }
  .btn-outline{ background:#fff; border-color:var(--brand-600); color:var(--brand-600); }
  .btn-outline:hover{ background:var(--brand-50); transform:translateY(-1px); }
  .btn-outline:active{ transform:translateY(1px); }
  .btn-lg{ height:52px; padding:0 30px; }
  .btn-sm{ height:40px; padding:0 18px; font-size:14px; border-radius:var(--r-sm); }

  /* ============ Drawer ============ */
  .drawer-mask{
    position:fixed; inset:0; background:rgba(15,26,51,.45); z-index:70;
    opacity:0; pointer-events:none; transition:opacity .25s ease;
  }
  .drawer-mask.is-open{ opacity:1; pointer-events:auto; }
  .mobile-drawer{
    position:fixed; top:0; right:0; bottom:0; width:84vw; max-width:340px;
    background:#fff; z-index:80; padding:22px 20px 0;
    display:flex; flex-direction:column;
    transform:translateX(100%); transition:transform .28s ease;
    box-shadow:var(--sh-lg);
  }
  .mobile-drawer.is-open{ transform:translateX(0); }
  .drawer-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:18px; }
  .drawer-close{
    width:44px; height:44px; display:flex; align-items:center; justify-content:center;
    border-radius:var(--r-sm); color:var(--muted);
  }
  .drawer-close:hover{ background:var(--brand-50); color:var(--brand-600); }
  .drawer-nav{ display:flex; flex-direction:column; gap:4px; flex:1 1 auto; }
  .drawer-link{
    display:flex; align-items:center; min-height:48px; padding:0 14px;
    border-radius:var(--r-sm); font-size:16px; font-weight:500; color:var(--ink);
  }
  .drawer-link:hover,.drawer-link.active{ background:var(--brand-50); color:var(--brand-600); }
  .drawer-foot{ padding:16px 0 22px; border-top:1px solid var(--line-soft); }
  .drawer-foot .btn{ width:100%; }

  /* ============ Article head ============ */
  .article-head{ background:#fff; border-bottom:1px solid var(--line-soft); padding:26px 0 40px; }
  .breadcrumb{ display:flex; flex-wrap:wrap; align-items:center; gap:8px; font-size:13px; color:var(--faint); }
  .breadcrumb a{ color:var(--muted); }
  .breadcrumb a:hover{ color:var(--brand-600); }
  .breadcrumb .sep{ color:#C3CDE0; }
  .breadcrumb .current{ color:var(--ink); max-width:100%; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }

  .article-title{
    font-size:34px; line-height:1.3; font-weight:800; letter-spacing:-.02em;
    margin-top:20px; max-width:900px;
  }
  .article-meta{ display:flex; flex-wrap:wrap; align-items:center; gap:12px; margin-top:18px; font-size:13px; color:var(--muted); }
  .article-meta .divider{ width:1px; height:12px; background:var(--line); }
  .badge{
    display:inline-flex; align-items:center; height:24px; padding:0 11px;
    border-radius:var(--r-pill); background:var(--brand-50); color:var(--brand-600);
    font-size:12px; font-weight:600;
  }
  .badge-accent{ background:var(--accent-50); color:var(--accent-500); }

  /* ============ Article body ============ */
  .article-wrap{ padding:56px 0 0; }
  .article-card{
    max-width:760px; margin:0 auto; background:var(--surface);
    border:1px solid var(--line); border-radius:var(--r-lg);
    box-shadow:var(--sh-sm); padding:48px;
  }
  .article-body{ font-size:17px; line-height:1.9; color:var(--ink); }
  .article-body > *:first-child{ margin-top:0; }
  .article-body p{ margin:0 0 1.25em; }
  .article-body h2{
    font-size:20px; font-weight:700; line-height:1.5;
    margin:40px 0 16px; padding-left:14px; border-left:4px solid var(--brand-600);
  }
  .article-body h3{ font-size:18px; font-weight:600; line-height:1.6; margin:28px 0 12px; }
  .article-body h4{ font-size:16px; font-weight:600; margin:22px 0 10px; }
  .article-body ul{ list-style:none; margin:0 0 1.25em; }
  .article-body ul > li{ position:relative; padding-left:18px; margin-bottom:10px; }
  .article-body ul > li::before{
    content:""; position:absolute; left:2px; top:.72em;
    width:6px; height:6px; border-radius:50%; background:var(--brand-600);
  }
  .article-body ol{ list-style:decimal; padding-left:22px; margin:0 0 1.25em; }
  .article-body ol > li{ margin-bottom:8px; padding-left:2px; }
  .article-body blockquote{
    margin:24px 0; padding:16px 20px; border-left:4px solid var(--brand-600);
    background:#F7F9FE; border-radius:0 12px 12px 0; color:var(--muted);
  }
  .article-body blockquote p:last-child{ margin-bottom:0; }
  .article-body img{ width:100%; border-radius:12px; margin:24px 0; }
  .article-body figure{ margin:24px 0; }
  .article-body figure img{ margin:0; }
  .article-body figcaption{ font-size:13px; color:var(--faint); text-align:center; margin-top:10px; }
  .article-body a{ color:var(--brand-600); text-decoration:underline; text-underline-offset:3px; }
  .article-body a:hover{ color:var(--brand-700); }
  .article-body strong{ font-weight:700; }
  .article-body hr{ border:0; border-top:1px solid var(--line); margin:32px 0; }
  .article-body table{ width:100%; border-collapse:collapse; margin:24px 0; font-size:15px; }
  .article-body th{ background:var(--brand-50); color:var(--brand-700); text-align:left; padding:12px 14px; }
  .article-body td{ padding:12px 14px; border-top:1px solid var(--line-soft); }
  .article-body code{ background:var(--line-soft); border-radius:6px; padding:2px 6px; font-size:15px; }

  .article-tags{
    display:flex; flex-wrap:wrap; align-items:center; gap:10px;
    margin-top:36px; padding-top:24px; border-top:1px solid var(--line-soft);
  }
  .article-tags .tag-label{ font-size:13px; font-weight:600; color:var(--muted); }
  .tag{
    display:inline-flex; align-items:center; height:30px; padding:0 14px;
    border-radius:var(--r-pill); background:var(--brand-50); color:var(--brand-600);
    font-size:13px; font-weight:600; transition:background-color .2s ease, color .2s ease;
  }
  .tag:hover{ background:#D8E4FB; color:var(--brand-700); }

  .empty-state{
    display:flex; flex-direction:column; align-items:center; gap:14px;
    background:#F7F9FE; border-radius:var(--r-md); padding:52px 24px; text-align:center;
  }
  .empty-state svg{ color:var(--brand-600); }
  .empty-state p{ font-size:16px; color:var(--muted); }
  .empty-state strong{ font-size:19px; font-weight:700; color:var(--ink); }

  /* ============ Actions row ============ */
  .article-actions{
    max-width:760px; margin:28px auto 0;
    display:flex; flex-wrap:wrap; gap:12px; align-items:center;
  }
  .article-actions .back-text{ font-size:14px; color:var(--muted); margin-left:4px; }
  .article-actions .back-text:hover{ color:var(--brand-600); }

  /* ============ Sections ============ */
  .section{ padding:var(--sec-y) 0 0; }
  .section-head{ display:flex; align-items:flex-end; justify-content:space-between; gap:20px; margin-bottom:30px; }
  .section-title{ font-size:32px; font-weight:700; line-height:1.3; letter-spacing:-.01em; }
  .section-sub{ font-size:15px; color:var(--muted); margin-top:10px; }
  .text-link{ font-size:14px; font-weight:600; color:var(--brand-600); white-space:nowrap; }
  .text-link:hover{ color:var(--brand-700); text-decoration:underline; text-underline-offset:4px; }

  /* ============ Related cards ============ */
  .card-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
  .post-card{
    display:flex; flex-direction:column; background:var(--surface);
    border:1px solid var(--line); border-radius:var(--r-md);
    box-shadow:var(--sh-sm); overflow:hidden;
    transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  }
  .post-card:hover{ transform:translateY(-2px); box-shadow:var(--sh-lg); border-color:#D5E0F4; }
  .post-cover{ aspect-ratio:16/10; overflow:hidden; background:var(--line-soft); }
  .post-cover img{ width:100%; height:100%; object-fit:cover; transition:transform .3s ease; }
  .post-card:hover .post-cover img{ transform:scale(1.03); }
  .post-body{ padding:20px; display:flex; flex-direction:column; gap:10px; flex:1 1 auto; }
  .post-title{
    font-size:18px; font-weight:600; line-height:1.5;
    display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;
  }
  .post-desc{
    font-size:14px; line-height:1.7; color:var(--muted);
    display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;
  }
  .post-foot{ margin-top:auto; display:flex; align-items:center; justify-content:space-between; font-size:13px; color:var(--faint); }

  /* ============ FAQ ============ */
  .faq-list{ background:var(--surface); border:1px solid var(--line); border-radius:var(--r-md); overflow:hidden; }
  .faq-item{ border-bottom:1px solid var(--line); }
  .faq-item:last-child{ border-bottom:0; }
  .faq-q{
    width:100%; display:flex; align-items:center; justify-content:space-between; gap:16px;
    padding:22px 24px; font-size:16px; font-weight:600; text-align:left; color:var(--ink);
    transition:color .2s ease, background-color .2s ease;
  }
  .faq-q:hover{ color:var(--brand-600); background:#FAFBFE; }
  .faq-icon{ flex:0 0 auto; color:var(--brand-600); transition:transform .25s ease; }
  .faq-item.is-open .faq-icon{ transform:rotate(180deg); }
  .faq-a{ display:none; padding:0 24px 22px; font-size:15px; line-height:1.8; color:var(--muted); }
  .faq-item.is-open .faq-a{ display:block; }

  /* ============ CTA band ============ */
  .cta-band{
    position:relative; overflow:hidden;
    background:var(--brand-50); border-radius:var(--r-lg);
    padding:38px 36px; display:flex; align-items:center; justify-content:space-between; gap:28px;
  }
  .cta-band::after{
    content:""; position:absolute; inset:0; pointer-events:none;
    background-image:repeating-linear-gradient(45deg, rgba(29,91,216,.06) 0 1px, transparent 1px 12px);
  }
  .cta-band > *{ position:relative; z-index:1; }
  .cta-title{ font-size:24px; font-weight:700; line-height:1.4; }
  .cta-text{ font-size:15px; color:var(--muted); margin-top:8px; max-width:640px; }
  .cta-actions{ display:flex; gap:12px; flex:0 0 auto; }

  /* ============ Footer ============ */
  .site-footer{ background:var(--footer-bg); color:#AEB9D0; padding:64px 0 0; margin-top:var(--sec-y); }
  .footer-grid{ display:grid; grid-template-columns:1.5fr 1fr 1fr 1.1fr; gap:40px; }
  .footer-title{ font-size:14px; font-weight:700; color:#fff; margin-bottom:16px; letter-spacing:.01em; }
  .footer-link{
    position:relative; display:block; font-size:14px; color:#AEB9D0;
    padding:6px 0; transition:color .2s ease, padding-left .2s ease;
  }
  .footer-link:hover{ color:#fff; padding-left:12px; }
  .footer-link:hover::before{
    content:""; position:absolute; left:0; top:50%; transform:translateY(-50%);
    width:3px; height:14px; border-radius:2px; background:var(--brand-600);
  }
  .footer-bottom{
    margin-top:48px; padding:22px 0 26px; border-top:1px solid rgba(255,255,255,.08);
    display:flex; flex-wrap:wrap; gap:12px 24px; justify-content:space-between;
    font-size:13px; color:#93A0BA;
  }

  /* ============ Responsive ============ */
  @media (max-width:1024px){
    :root{ --sec-y:72px; }
    .container-x{ padding:0 24px; }
    .nav-links{ margin-left:0; }
    .header-actions .btn-outline{ display:none; }
    .article-title{ font-size:30px; }
    .card-grid{ grid-template-columns:repeat(2,1fr); }
    .footer-grid{ grid-template-columns:1fr 1fr; gap:36px; }
  }
  @media (max-width:768px){
    :root{ --sec-y:60px; }
    .header-inner{ height:60px; gap:12px; }
    .nav-links{ display:none; }
    .header-actions{ display:none; }
    .nav-toggle{ display:flex; }
    .logo-text{ font-size:17px; }
    .article-card{ padding:28px 20px; border-radius:var(--r-md); }
    .article-head{ padding:20px 0 30px; }
    .article-title{ font-size:24px; }
    .article-wrap{ padding:36px 0 0; }
    .article-body{ font-size:16px; line-height:1.85; }
    .article-body h2{ font-size:19px; margin-top:32px; }
    .card-grid{ grid-template-columns:1fr; }
    .section-head{ flex-direction:column; align-items:flex-start; gap:10px; }
    .section-title{ font-size:24px; }
    .cta-band{ flex-direction:column; align-items:flex-start; padding:28px 22px; }
    .cta-actions{ width:100%; flex-direction:column; }
    .cta-actions .btn{ width:100%; }
    .cta-title{ font-size:20px; }
    .faq-q{ padding:18px 18px; font-size:15px; }
    .faq-a{ padding:0 18px 18px; }
    .footer-grid{ grid-template-columns:1fr; gap:30px; }
    .site-footer{ padding-top:48px; }
  }
  @media (max-width:520px){
    .container-x{ padding:0 16px; }
    .article-actions{ flex-direction:column; align-items:stretch; }
    .article-actions .btn{ width:100%; }
    .article-actions .back-text{ text-align:center; margin-left:0; }
    .footer-bottom{ flex-direction:column; gap:8px; }
  }
  @media (prefers-reduced-motion:reduce){
    *{ animation:none !important; transition:none !important; scroll-behavior:auto !important; }
  }

/* roulang page: category1 */
:root{
    --brand-600:#1D5BD8;
    --brand-700:#1748AC;
    --brand-50:#E8EFFD;
    --accent-500:#FF7A1A;
    --accent-50:#FFF1E6;
    --teal-500:#0FB5A6;
    --danger:#E5484D;
    --bg:#F5F7FB;
    --surface:#FFFFFF;
    --line:#E2E8F4;
    --line-soft:#EEF2F9;
    --ink:#16203A;
    --muted:#5C6B87;
    --faint:#8A97AE;
    --footer-bg:#0F1A33;
    --r-sm:10px;
    --r-md:16px;
    --r-lg:24px;
    --sh-sm:0 1px 2px rgba(16,32,64,.04), 0 4px 14px rgba(16,32,64,.05);
    --sh-md:0 6px 24px rgba(16,32,64,.08);
    --sh-lg:0 14px 36px rgba(16,32,64,.12);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
    font-size:16px;
    line-height:1.75;
    color:var(--ink);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4,p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  a{color:inherit;text-decoration:none;}
  img{display:block;max-width:100%;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  .num{font-variant-numeric:tabular-nums;}

  .container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
  @media (max-width:767px){.container-x{padding:0 16px;}}

  /* ---------- Header / Nav ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    height:72px;
    background:rgba(255,255,255,.92);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease;
  }
  .site-header.is-scrolled{box-shadow:var(--sh-sm);}
  .nav-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;}
  .logo{display:inline-flex;align-items:center;gap:10px;min-height:32px;font-weight:800;}
  .logo-mark{
    width:32px;height:32px;border-radius:var(--r-sm);
    background:var(--brand-600);color:#fff;
    display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
  }
  .logo-text{font-size:18px;letter-spacing:-.01em;color:var(--ink);white-space:nowrap;}
  .logo-accent{color:var(--brand-600);}

  .nav-links{display:flex;align-items:center;gap:6px;}
  .nav-link{
    position:relative;padding:9px 14px;border-radius:var(--r-sm);
    font-size:15px;color:var(--ink);
    transition:color .18s ease,background-color .18s ease;
    white-space:nowrap;
  }
  .nav-link:hover{color:var(--brand-600);background:var(--line-soft);}
  .nav-link.active{color:var(--brand-600);font-weight:600;}
  .nav-link.active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
    border-radius:2px;background:var(--brand-600);
  }
  .nav-pill{background:var(--brand-50);color:var(--brand-600);font-weight:600;}
  .nav-pill:hover{background:#DCE7FC;color:var(--brand-700);}
  .nav-pill.active{box-shadow:inset 0 0 0 1px rgba(29,91,216,.4);color:var(--brand-700);}
  .nav-pill.active::after{display:none;}

  .nav-cta{display:flex;align-items:center;gap:10px;}
  .nav-toggle{
    display:none;width:44px;height:44px;border-radius:12px;
    border:1px solid var(--line);background:#fff;
    align-items:center;justify-content:center;
  }
  .nav-toggle:hover{background:var(--line-soft);}
  @media (max-width:1023px){
    .nav-links,.nav-cta{display:none;}
    .nav-toggle{display:inline-flex;}
  }

  /* ---------- Mobile drawer ---------- */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(15,26,51,.42);z-index:70;
    opacity:0;pointer-events:none;transition:opacity .24s ease;
  }
  .drawer-mask.show{opacity:1;pointer-events:auto;}
  .mobile-drawer{
    position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;
    background:#fff;z-index:80;padding:20px;
    transform:translateX(102%);transition:transform .28s ease;
    display:flex;flex-direction:column;overflow-y:auto;
  }
  .mobile-drawer.open{transform:translateX(0);}
  .drawer-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px;}
  .drawer-close{
    width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
    display:inline-flex;align-items:center;justify-content:center;background:#fff;
  }
  .drawer-close:hover{background:var(--line-soft);}
  .drawer-links a{
    display:block;padding:14px 12px;border-radius:12px;font-size:16px;
    border-bottom:1px solid var(--line-soft);
  }
  .drawer-links a:hover{background:var(--line-soft);}
  .drawer-links a.active{background:var(--brand-50);color:var(--brand-600);font-weight:600;}
  .drawer-foot{margin-top:auto;padding-top:22px;display:flex;flex-direction:column;gap:10px;}
  @media (min-width:1024px){
    .mobile-drawer,.drawer-mask{display:none !important;}
  }

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 26px;border-radius:12px;
    font-size:15px;font-weight:600;border:1px solid transparent;
    transition:background-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
    white-space:nowrap;
  }
  .btn-primary{background:var(--brand-600);color:#fff;}
  .btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-lg);}
  .btn-primary:active{transform:translateY(1px);}
  .btn-outline{background:#fff;border-color:var(--brand-600);color:var(--brand-600);}
  .btn-outline:hover{background:var(--brand-50);color:var(--brand-700);transform:translateY(-1px);}
  .btn-outline:active{transform:translateY(1px);}
  .btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:var(--r-sm);}
  .btn-lg{height:52px;padding:0 28px;}
  .btn:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}

  /* ---------- Category hero ---------- */
  .hero-cat{position:relative;overflow:hidden;background:var(--brand-50);border-bottom:1px solid var(--line);padding:48px 0 52px;}
  .hero-cat-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
  .hero-cat-veil{
    position:absolute;inset:0;
    background:linear-gradient(96deg,rgba(232,239,253,.97) 0%,rgba(232,239,253,.90) 46%,rgba(232,239,253,.62) 100%);
  }
  .hero-cat-inner{position:relative;z-index:1;max-width:820px;}
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:14px;flex-wrap:wrap;}
  .breadcrumb a:hover{color:var(--brand-600);}
  .breadcrumb .sep{color:var(--faint);}
  .breadcrumb .crumb-current{color:var(--ink);}
  .cat-title{font-size:clamp(28px,4.2vw,40px);font-weight:800;line-height:1.2;letter-spacing:-.02em;}
  .cat-lead{margin-top:14px;font-size:17px;color:var(--muted);max-width:700px;}

  /* ---------- Sections ---------- */
  .section{padding:96px 0;}
  @media (max-width:767px){.section{padding:56px 0;}}
  .section-alt{background:#fff;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);}
  .section-head{max-width:780px;margin-bottom:32px;}
  .section-head h2{font-size:clamp(23px,3vw,32px);font-weight:700;line-height:1.3;letter-spacing:-.01em;margin-top:14px;}
  .section-head p{margin-top:12px;color:var(--muted);font-size:16px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
    background:var(--brand-50);color:var(--brand-600);font-size:13px;font-weight:600;
  }

  /* ---------- Zigzag ---------- */
  .zigzag{display:grid;gap:32px;align-items:center;}
  .zigzag-media{
    position:relative;border-radius:var(--r-md);overflow:hidden;
    border:1px solid var(--line);box-shadow:var(--sh-sm);
    aspect-ratio:4/3;background:var(--line-soft);
  }
  .zigzag-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
  .zigzag-media:hover img{transform:scale(1.03);}
  .zigzag-body h3{font-size:20px;font-weight:600;line-height:1.45;}
  .zigzag-body p{margin-top:14px;color:var(--muted);font-size:16px;line-height:1.8;}
  .text-link{
    display:inline-flex;align-items:center;gap:6px;margin-top:18px;
    color:var(--brand-600);font-weight:600;font-size:15px;
    border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease;
  }
  .text-link:hover{color:var(--brand-700);border-color:var(--brand-700);}
  .text-link:focus-visible{outline:2px solid var(--brand-600);outline-offset:3px;border-radius:4px;}
  @media (min-width:1024px){
    .zigzag{grid-template-columns:1fr 1fr;gap:56px;}
    .zigzag + .zigzag{margin-top:76px;}
    .zigzag.is-reverse .zigzag-media{order:2;}
  }
  @media (max-width:1023px){
    .zigzag + .zigzag{margin-top:48px;}
  }

  /* ---------- Check cards ---------- */
  .check-grid{display:grid;gap:16px;}
  @media (min-width:640px){.check-grid{grid-template-columns:1fr 1fr;}}
  .check-card{
    display:flex;gap:14px;padding:22px;background:var(--surface);
    border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-sm);
    transition:transform .2s ease,box-shadow .2s ease;
  }
  .check-card:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);}
  .check-icon{
    width:36px;height:36px;border-radius:var(--r-sm);flex:0 0 auto;
    background:var(--brand-50);color:var(--brand-600);
    display:flex;align-items:center;justify-content:center;
  }
  .check-card h3{font-size:17px;font-weight:600;}
  .check-card p{margin-top:8px;font-size:14.5px;line-height:1.75;color:var(--muted);}

  /* ---------- Status cards ---------- */
  .status-grid{display:grid;gap:20px;}
  @media (min-width:768px){.status-grid{grid-template-columns:repeat(3,1fr);}}
  .status-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
    padding:24px;box-shadow:var(--sh-sm);transition:transform .2s ease,box-shadow .2s ease;
  }
  .status-card:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);}
  .status-badge{
    display:inline-flex;align-items:center;gap:8px;padding:5px 12px;
    border-radius:999px;font-size:13px;font-weight:600;
  }
  .status-dot{width:8px;height:8px;border-radius:50%;flex:0 0 auto;}
  .s-ok{background:#E6F8F6;color:#0A8A7E;}
  .s-ok .status-dot{background:var(--teal-500);}
  .s-warn{background:var(--accent-50);color:#C4550A;}
  .s-warn .status-dot{background:var(--accent-500);}
  .s-maint{background:var(--line-soft);color:var(--muted);}
  .s-maint .status-dot{background:var(--faint);}
  .status-card h3{margin-top:14px;font-size:18px;font-weight:600;}
  .status-card p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--muted);}

  /* ---------- FAQ ---------- */
  .faq-wrap{max-width:920px;}
  .faq-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;}
  .faq-item + .faq-item{border-top:1px solid var(--line);}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 22px;min-height:44px;text-align:left;
    font-size:16px;font-weight:600;color:var(--ink);
    transition:background-color .18s ease;
  }
  .faq-q:hover{background:#FAFBFE;}
  .faq-q:focus-visible{outline:2px solid var(--brand-600);outline-offset:-3px;}
  .faq-icon{position:relative;width:24px;height:24px;flex:0 0 auto;}
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;left:50%;top:50%;background:var(--brand-600);border-radius:2px;
    transition:transform .24s ease,opacity .24s ease;
  }
  .faq-icon::before{width:14px;height:2px;transform:translate(-50%,-50%);}
  .faq-icon::after{width:2px;height:14px;transform:translate(-50%,-50%);}
  .faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
  .faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .28s ease;}
  .faq-item.open .faq-a{grid-template-rows:1fr;}
  .faq-a-inner{overflow:hidden;}
  .faq-a p{padding:0 22px 22px;font-size:15px;line-height:1.85;color:var(--muted);}

  /* ---------- CTA band ---------- */
  .cta-band{
    position:relative;overflow:hidden;background:var(--brand-50);
    border-radius:var(--r-lg);padding:40px;
    display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between;
  }
  .cta-band::before{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:repeating-linear-gradient(135deg,rgba(29,91,216,.06) 0 8px,transparent 8px 20px);
  }
  .cta-band > *{position:relative;z-index:1;}
  .cta-band h2{font-size:clamp(21px,2.6vw,28px);font-weight:700;line-height:1.35;}
  .cta-band p{margin-top:10px;font-size:15.5px;line-height:1.8;color:var(--muted);max-width:600px;}
  .cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
  .back-home{
    display:inline-flex;align-items:center;gap:6px;margin-top:20px;
    font-size:14px;color:var(--muted);transition:color .18s ease;
  }
  .back-home:hover{color:var(--brand-600);}

  /* ---------- Footer ---------- */
  .site-footer{background:var(--footer-bg);color:#AEB9D0;padding:64px 0 28px;margin-top:96px;}
  @media (max-width:767px){.site-footer{margin-top:56px;padding:48px 0 24px;}}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
  @media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;}}
  @media (max-width:639px){.footer-grid{grid-template-columns:1fr;gap:32px;}}
  .footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px;}
  .footer-link{
    display:inline-block;padding:6px 0;font-size:14px;color:#AEB9D0;
    border-left:3px solid transparent;
    transition:color .18s ease,padding-left .18s ease,border-color .18s ease;
  }
  .footer-link:hover{color:#fff;padding-left:8px;border-left-color:var(--brand-600);}
  .footer-bottom{
    margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
    display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;
    font-size:13px;color:#93A0BA;
  }

  /* ---------- Motion ---------- */
  .fade-up{opacity:0;transform:translateY(12px);transition:opacity .24s ease,transform .24s ease;}
  .fade-up.in{opacity:1;transform:none;}
  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;}
    .fade-up{opacity:1;transform:none;}
    html{scroll-behavior:auto;}
  }

/* roulang page: category2 */
:root{
  --brand-600:#1D5BD8;
  --brand-700:#1748AC;
  --brand-50:#E8EFFD;
  --accent-500:#FF7A1A;
  --accent-50:#FFF1E6;
  --teal-500:#0FB5A6;
  --warn:#E5484D;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E2E8F4;
  --line-soft:#EEF2F9;
  --ink:#16203A;
  --muted:#5C6B87;
  --faint:#8A97AE;
  --footer-bg:#0F1A33;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:24px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(16,32,64,.04),0 4px 14px rgba(16,32,64,.05);
  --sh-md:0 6px 24px rgba(16,32,64,.08);
  --sh-lg:0 14px 36px rgba(16,32,64,.12);
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--ink);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
svg{display:block;}

.container-x{max-width:var(--container);margin:0 auto;padding:0 32px;width:100%;}
@media (max-width:768px){ .container-x{padding:0 16px;} }

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--sh-sm);}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--sh-lg);}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--sh-sm);}
.btn-outline{background:#fff;color:var(--brand-600);border-color:var(--brand-600);}
.btn-outline:hover{background:var(--brand-50);transform:translateY(-1px);box-shadow:var(--sh-sm);}
.btn-outline:active{transform:translateY(1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px;}
.btn-lg{height:52px;padding:0 28px;}
.btn:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}
.btn-block{width:100%;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-sm);}
.header-inner{display:flex;align-items:center;gap:20px;height:72px;}
.logo{display:flex;align-items:center;gap:10px;min-height:32px;flex:0 0 auto;}
.logo-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand-600);color:#fff;
  display:grid;place-items:center;flex:0 0 34px;
}
.logo-text{font-size:19px;font-weight:800;letter-spacing:-.02em;color:var(--ink);white-space:nowrap;}
.logo-accent{color:var(--brand-600);}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 13px;
  font-size:15px;font-weight:500;color:var(--ink);border-radius:12px;
  transition:color .18s ease,background-color .18s ease;
}
.nav-link:hover{color:var(--brand-600);}
.nav-link.active{color:var(--brand-600);font-weight:600;}
.nav-link.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:4px;height:2px;
  background:var(--brand-600);border-radius:2px;
}
.nav-pill{background:var(--brand-50);color:var(--brand-600);font-weight:600;}
.nav-pill:hover{background:#DCE7FB;color:var(--brand-700);}
.header-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.menu-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--ink);margin-left:auto;
  transition:background-color .18s ease,color .18s ease;
}
.menu-toggle:hover{background:var(--brand-50);color:var(--brand-600);}
.menu-toggle:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}

@media (max-width:1023px){
  .nav-links,.header-cta{display:none;}
  .menu-toggle{display:inline-flex;}
  .header-inner{height:60px;gap:12px;}
  .logo-text{font-size:17px;}
}

/* ============ 移动端抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(15,26,51,.45);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.drawer-mask.show{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;
  background:#fff;z-index:90;transform:translateX(100%);
  transition:transform .3s ease;display:flex;flex-direction:column;
  padding:18px 18px 24px;overflow-y:auto;box-shadow:var(--sh-lg);
}
.drawer.show{transform:translateX(0);}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.drawer-title{font-size:16px;font-weight:700;}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;
  color:var(--muted);display:grid;place-items:center;
}
.drawer-close:hover{background:var(--brand-50);color:var(--brand-600);}
.drawer-nav{display:flex;flex-direction:column;gap:6px;}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;padding:0 14px;border-radius:12px;
  font-size:16px;font-weight:600;color:var(--ink);
  transition:background-color .18s ease,color .18s ease;
}
.drawer-link:hover{background:var(--line-soft);color:var(--brand-600);}
.drawer-link.active{background:var(--brand-50);color:var(--brand-600);}
.drawer-foot{margin-top:auto;padding-top:22px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px;}
.drawer-note{font-size:13px;color:var(--faint);line-height:1.7;}

/* ============ 分类页 Hero ============ */
.cat-hero{position:relative;overflow:hidden;background:var(--brand-50);border-bottom:1px solid var(--line);}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(100deg,rgba(232,239,253,.97) 0%,rgba(232,239,253,.90) 48%,rgba(232,239,253,.70) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.cat-hero .hero-inner{position:relative;z-index:1;padding:44px 0 48px;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);}
.crumb a{color:var(--muted);transition:color .18s ease;}
.crumb a:hover{color:var(--brand-600);}
.crumb .sep{color:var(--faint);}
.crumb .cur{color:var(--ink);font-weight:600;}
.cat-hero h1{
  font-size:clamp(26px,4vw,38px);font-weight:800;line-height:1.2;letter-spacing:-.02em;
  margin:16px 0 12px;
}
.hero-desc{font-size:17px;line-height:1.8;color:var(--muted);max-width:680px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}

/* ============ 标签 ============ */
.tag{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12.5px;font-weight:600;line-height:1;
  background:var(--brand-50);color:var(--brand-600);white-space:nowrap;
}
.tag-accent{background:var(--accent-50);color:var(--accent-500);}
.tag-teal{background:#E3F6F4;color:#0A8C80;}
.tag-soft{background:#fff;color:var(--muted);border:1px solid var(--line);}

/* ============ 板块 ============ */
.section{padding:88px 0;}
.section-tight{padding:64px 0 0;}
@media (max-width:768px){ .section{padding:56px 0;} .section-tight{padding:44px 0 0;} }
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:30px;flex-wrap:wrap;}
.section-title{font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.3;letter-spacing:-.01em;}
.section-sub{font-size:15px;line-height:1.8;color:var(--muted);margin-top:10px;max-width:660px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  color:var(--brand-600);transition:color .18s ease;
}
.text-link:hover{color:var(--brand-700);}
.text-link:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}

/* ============ 分组列表 ============ */
.list-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-sm);padding:8px 36px;
}
.group{
  display:grid;grid-template-columns:210px minmax(0,1fr);gap:40px;
  padding:34px 0;border-top:1px solid var(--line-soft);
}
.group:first-child{border-top:0;}
.group-head h3{font-size:18px;font-weight:700;line-height:1.4;margin-bottom:8px;}
.group-head p{font-size:14px;line-height:1.75;color:var(--muted);}
.group-count{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;margin-top:14px;
  border-radius:var(--r-pill);background:var(--brand-50);color:var(--brand-600);
  font-size:12px;font-weight:600;
}
.group-list{display:flex;flex-direction:column;}
.item{
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:16px 0;
}
.item + .item{border-top:1px solid var(--line-soft);}
.group-list .item:first-child{padding-top:2px;}
.item-title{font-size:16px;font-weight:600;line-height:1.5;}
.item-desc{font-size:14px;line-height:1.7;color:var(--muted);margin-top:4px;}
.item .tag{margin-top:2px;flex:0 0 auto;}
@media (max-width:860px){
  .list-card{padding:6px 20px;}
  .group{grid-template-columns:1fr;gap:16px;padding:26px 0;}
  .group-list .item:first-child{padding-top:6px;}
  .item{flex-direction:column;gap:8px;}
  .item .tag{margin-top:2px;}
}

/* ============ 卡片网格 ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media (max-width:1023px){ .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));} }
@media (max-width:640px){ .grid-3{grid-template-columns:1fr;} }
.card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-sm);
  overflow:hidden;transition:transform .2s ease,box-shadow .2s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);}
.card-cover{aspect-ratio:16/10;overflow:hidden;background:var(--line-soft);}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.card:hover .card-cover img{transform:scale(1.03);}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-title{font-size:18px;font-weight:600;line-height:1.45;}
.card-text{font-size:14px;line-height:1.75;color:var(--muted);}
.card-foot{margin-top:auto;padding-top:6px;}
.img-fallback{position:relative;background:var(--line-soft);display:grid;place-items:center;}
.img-fallback::after{
  content:"";width:32px;height:32px;
  background:no-repeat center/contain url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231D5BD8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='4' width='18' height='16' rx='2'/%3E%3Ccircle cx='8.5' cy='9.5' r='1.5'/%3E%3Cpath d='M21 15l-5-5-6 6-3-3-4 4'/%3E%3C/svg%3E");
}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media (max-width:1023px){ .steps{grid-template-columns:1fr;gap:16px;} }
.step{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);padding:26px 24px;box-shadow:var(--sh-sm);
  transition:transform .2s ease,box-shadow .2s ease;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);}
.step-num{
  font-size:38px;font-weight:800;line-height:1;color:#C2D4F8;
  font-variant-numeric:tabular-nums;letter-spacing:-.03em;
}
.step-ico{
  width:38px;height:38px;border-radius:10px;background:var(--brand-50);color:var(--brand-600);
  display:grid;place-items:center;margin:16px 0 14px;
}
.step h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.step p{font-size:14px;line-height:1.8;color:var(--muted);}

/* ============ 统计条 ============ */
.stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-sm);padding:30px 32px;
}
@media (max-width:768px){ .stats{grid-template-columns:1fr;gap:20px;padding:24px 20px;} }
.stat{display:flex;flex-direction:column;gap:6px;position:relative;}
.stat-num{
  font-size:32px;font-weight:800;line-height:1.1;color:var(--brand-600);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.stat-label{font-size:14px;color:var(--muted);}
.stat-divider{position:absolute;left:-12px;top:4px;bottom:4px;width:1px;background:var(--line-soft);}
@media (max-width:768px){ .stat-divider{display:none;} }

/* ============ FAQ ============ */
.faq{border:1px solid var(--line);border-radius:var(--r-md);background:#fff;overflow:hidden;}
.faq-item + .faq-item{border-top:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;background:transparent;border:0;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;min-height:64px;
  transition:color .18s ease,background-color .18s ease;
}
.faq-q:hover{color:var(--brand-600);background:#FBFCFE;}
.faq-q:focus-visible{outline:2px solid var(--brand-600);outline-offset:-2px;}
.faq-ico{width:24px;height:24px;flex:0 0 24px;color:var(--brand-600);transition:transform .25s ease;}
.faq-item.open .faq-ico{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a p{padding:0 24px 20px;font-size:15px;line-height:1.8;color:var(--muted);}
@media (max-width:640px){ .faq-q{padding:16px 18px;font-size:15px;} .faq-a p{padding:0 18px 16px;} }

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;overflow:hidden;background:var(--brand-50);border-radius:var(--r-lg);
  padding:38px 40px;display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(135deg,rgba(29,91,216,.06) 0 1px,transparent 1px 13px);
}
.cta-copy{position:relative;z-index:1;max-width:620px;}
.cta-title{font-size:clamp(20px,2.6vw,26px);font-weight:700;line-height:1.35;margin-bottom:10px;}
.cta-text{font-size:15px;line-height:1.8;color:var(--muted);}
.cta-actions{position:relative;z-index:1;display:flex;gap:12px;flex-wrap:wrap;}
@media (max-width:768px){
  .cta-band{padding:26px 20px;gap:20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
}
.back-row{display:flex;justify-content:center;margin-top:26px;}
.back-home{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  color:var(--muted);padding:10px 4px;border-radius:8px;transition:color .18s ease;
}
.back-home:hover{color:var(--brand-600);}
.back-home:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--footer-bg);color:#C6D0E4;padding:64px 0 28px;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
@media (max-width:900px){ .footer-grid{grid-template-columns:1fr 1fr;gap:32px;} }
@media (max-width:560px){ .footer-grid{grid-template-columns:1fr;} }
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-link{
  display:block;position:relative;font-size:14px;line-height:1.6;color:#AEB9D0;
  padding:6px 0;transition:color .18s ease,padding-left .18s ease;
}
.footer-link::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:3px;height:0;background:var(--brand-600);border-radius:2px;
  transition:height .2s ease;
}
.footer-link:hover{color:#fff;padding-left:4px;}
.footer-link:hover::before{height:14px;}
.footer-link:focus-visible{outline:2px solid #6E9BF0;outline-offset:2px;border-radius:6px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  border-top:1px solid rgba(255,255,255,.1);margin-top:42px;padding-top:22px;
  font-size:13px;color:#93A0BA;
}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .24s ease,transform .24s ease;}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
    --brand-600:#1D5BD8;
    --brand-700:#1748AC;
    --brand-50:#E8EFFD;
    --accent-500:#FF7A1A;
    --accent-50:#FFF1E6;
    --teal-500:#0FB5A6;
    --danger:#E5484D;
    --bg:#F5F7FB;
    --surface:#FFFFFF;
    --line:#E2E8F4;
    --line-soft:#EEF2F9;
    --ink:#16203A;
    --muted:#5C6B87;
    --faint:#8A97AE;
    --footer-bg:#0F1A33;
    --r-sm:10px;
    --r-md:16px;
    --r-lg:24px;
    --sh-sm:0 1px 2px rgba(16,32,64,.04), 0 4px 14px rgba(16,32,64,.05);
    --sh-md:0 6px 24px rgba(16,32,64,.08);
    --sh-lg:0 14px 36px rgba(16,32,64,.12);
    --container:1200px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;height:auto;}
  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{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  :focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px;}
  .num{font-variant-numeric:tabular-nums;}

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

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(255,255,255,.92);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease;
  }
  .site-header.is-scrolled{box-shadow:var(--sh-sm);}
  .header-inner{
    display:flex;
    align-items:center;
    gap:20px;
    height:72px;
  }
  .logo{display:inline-flex;align-items:center;gap:10px;min-height:32px;flex-shrink:0;}
  .logo-mark{
    width:34px;height:34px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:var(--r-sm);
    background:var(--brand-600);
    color:#fff;
    flex-shrink:0;
  }
  .logo-text{
    font-size:18px;
    font-weight:800;
    letter-spacing:-.01em;
    color:var(--ink);
    white-space:nowrap;
  }
  .logo-text span{color:var(--brand-600);}

  .nav-links{
    display:flex;
    align-items:center;
    gap:4px;
    margin-left:auto;
    flex-wrap:nowrap;
  }
  .nav-link{
    display:inline-flex;
    align-items:center;
    height:38px;
    padding:0 14px;
    border-radius:var(--r-sm);
    font-size:15px;
    font-weight:500;
    color:var(--ink);
    transition:color .2s ease,background-color .2s ease;
    white-space:nowrap;
  }
  .nav-link:hover{color:var(--brand-600);}
  .nav-pill{
    background:var(--brand-50);
    color:var(--brand-600);
    font-weight:600;
  }
  .nav-pill:hover{background:#DCE7FC;color:var(--brand-700);}
  .nav-link.active{
    color:var(--brand-600);
    text-decoration:underline;
    text-decoration-thickness:2px;
    text-decoration-color:var(--brand-600);
    text-underline-offset:6px;
  }
  .nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .nav-toggle{
    display:none;
    width:44px;height:44px;
    border-radius:var(--r-sm);
    align-items:center;justify-content:center;
    flex-direction:column;gap:5px;
    margin-left:auto;
  }
  .nav-toggle span{
    display:block;width:20px;height:2px;border-radius:2px;background:var(--ink);
    transition:transform .25s ease,opacity .25s ease;
  }
  .nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle.is-open span:nth-child(2){opacity:0;}
  .nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  /* ---------- 通用按钮 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:48px;
    padding:0 26px;
    border-radius:12px;
    font-size:15px;
    font-weight:600;
    white-space:nowrap;
    transition:background-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  }
  .btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--sh-sm);}
  .btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--sh-lg);}
  .btn-primary:active{transform:translateY(1px);}
  .btn-outline{border:1px solid var(--brand-600);color:var(--brand-600);background:#fff;}
  .btn-outline:hover{background:var(--brand-50);transform:translateY(-1px);}
  .btn-outline:active{transform:translateY(1px);}
  .btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px;}
  .btn-lg{height:52px;padding:0 30px;font-size:16px;}
  .btn[disabled]{opacity:.6;cursor:not-allowed;transform:none;}

  .text-link{
    display:inline-flex;align-items:center;gap:6px;
    color:var(--brand-600);font-size:15px;font-weight:600;
    transition:color .2s ease,gap .2s ease;
  }
  .text-link:hover{color:var(--brand-700);gap:10px;}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:4px 12px;
    border-radius:999px;
    font-size:13px;font-weight:600;
    background:var(--brand-50);color:var(--brand-600);
  }
  .badge-accent{background:var(--accent-50);color:var(--accent-500);}
  .badge-teal{background:rgba(15,181,166,.12);color:#0A8B80;}

  /* ---------- 页面 Hero ---------- */
  .page-hero{
    position:relative;
    background:linear-gradient(180deg,#EAF1FE 0%,#F5F7FB 100%);
    border-bottom:1px solid var(--line);
    overflow:hidden;
  }
  .page-hero::after{
    content:"";
    position:absolute;
    inset:0;
    background-image:repeating-linear-gradient(135deg,rgba(29,91,216,.05) 0 1px,transparent 1px 16px);
    pointer-events:none;
  }
  .page-hero-inner{
    position:relative;
    z-index:1;
    min-height:224px;
    padding:38px 0 40px;
    display:flex;
    flex-direction:column;
    justify-content:center;
  }
  .breadcrumb{
    display:flex;align-items:center;gap:8px;
    font-size:13px;color:var(--muted);
    margin-bottom:16px;flex-wrap:wrap;
  }
  .breadcrumb a{transition:color .2s ease;}
  .breadcrumb a:hover{color:var(--brand-600);}
  .breadcrumb .sep{color:var(--faint);}
  .breadcrumb .current{color:var(--ink);font-weight:600;}
  .page-hero h1{
    font-size:40px;
    line-height:1.2;
    font-weight:800;
    letter-spacing:-.02em;
    max-width:820px;
  }
  .page-hero-desc{
    margin-top:16px;
    max-width:720px;
    font-size:17px;
    line-height:1.8;
    color:var(--muted);
  }

  /* ---------- 板块通用 ---------- */
  .section{padding:88px 0;}
  .section-tight{padding:64px 0;}
  .section-head{max-width:760px;margin-bottom:32px;}
  .section-head h2{
    font-size:32px;
    line-height:1.3;
    font-weight:700;
    letter-spacing:-.01em;
  }
  .section-head p{
    margin-top:14px;
    font-size:16px;
    line-height:1.85;
    color:var(--muted);
  }
  .section-head-row{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:24px;
    margin-bottom:32px;
    flex-wrap:wrap;
  }
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:700;letter-spacing:.08em;
    color:var(--brand-600);
    text-transform:uppercase;
    margin-bottom:12px;
  }
  .eyebrow::before{
    content:"";width:22px;height:2px;border-radius:2px;background:var(--brand-600);
  }

  /* ---------- 数据概览 ---------- */
  .overview-grid{
    display:grid;
    grid-template-columns:1.1fr 1fr;
    gap:40px;
    align-items:center;
  }
  .stat-grid{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:16px;
    margin-top:28px;
  }
  .stat-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-md);
    box-shadow:var(--sh-sm);
    padding:20px;
    transition:box-shadow .2s ease,transform .2s ease;
  }
  .stat-card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);}
  .stat-value{
    font-size:30px;
    font-weight:800;
    letter-spacing:-.02em;
    color:var(--brand-600);
  }
  .stat-value small{font-size:15px;font-weight:600;margin-left:2px;color:var(--brand-700);}
  .stat-label{margin-top:6px;font-size:13px;color:var(--faint);}

  .figure-card{
    border-radius:var(--r-lg);
    overflow:hidden;
    border:1px solid var(--line);
    box-shadow:var(--sh-md);
    background:#fff;
    position:relative;
  }
  .figure-card img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .35s ease;}
  .figure-card:hover img{transform:scale(1.03);}
  .figure-card figcaption{
    padding:14px 18px;
    font-size:13px;
    color:var(--muted);
    border-top:1px solid var(--line-soft);
    background:#fff;
  }

  /* ---------- 对照表 ---------- */
  .table-shell{
    border:1px solid var(--line);
    border-radius:var(--r-md);
    overflow:hidden;
    background:#fff;
    box-shadow:var(--sh-sm);
  }
  .table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
  .data-table{
    width:100%;
    min-width:920px;
    border-collapse:collapse;
    font-size:15px;
  }
  .data-table thead th{
    background:var(--brand-50);
    color:var(--brand-700);
    font-size:14px;
    font-weight:700;
    text-align:left;
    padding:0 20px;
    height:52px;
    white-space:nowrap;
    border-bottom:1px solid var(--line);
  }
  .data-table tbody td{
    padding:14px 20px;
    height:52px;
    color:var(--ink);
    border-bottom:1px solid var(--line-soft);
    vertical-align:middle;
    line-height:1.6;
  }
  .data-table tbody tr:nth-child(even){background:#FAFBFE;}
  .data-table tbody tr:hover{background:#F3F7FE;}
  .data-table tbody tr:last-child td{border-bottom:0;}
  .data-table .cell-strong{font-weight:700;color:var(--brand-700);}
  .table-note{
    margin-top:16px;
    font-size:13px;
    line-height:1.8;
    color:var(--faint);
  }

  /* ---------- 图文分栏 ---------- */
  .split{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:48px;
    align-items:center;
  }
  .check-list{display:grid;gap:14px;margin-top:24px;}
  .check-list li{
    display:flex;
    gap:12px;
    align-items:flex-start;
    font-size:15px;
    line-height:1.8;
    color:var(--muted);
  }
  .check-list .mark{
    flex-shrink:0;
    width:22px;height:22px;
    margin-top:2px;
    border-radius:999px;
    display:inline-flex;align-items:center;justify-content:center;
    background:var(--brand-50);
    color:var(--brand-600);
  }
  .check-list strong{color:var(--ink);font-weight:600;}

  /* ---------- 长文排版 ---------- */
  .longform{
    max-width:760px;
    margin:0 auto;
    font-size:17px;
    line-height:1.9;
    color:var(--ink);
  }
  .longform h2{
    font-size:22px;
    font-weight:700;
    line-height:1.45;
    padding-left:16px;
    border-left:4px solid var(--brand-600);
    margin:0 0 20px;
  }
  .longform h3{
    font-size:18px;
    font-weight:600;
    margin:32px 0 12px;
  }
  .longform p{margin:0 0 1.25em;color:#22304F;}
  .longform p:last-child{margin-bottom:0;}
  .longform .figure-inline{
    margin:32px 0;
    border-radius:var(--r-md);
    overflow:hidden;
    border:1px solid var(--line);
    background:#fff;
  }
  .longform .figure-inline img{width:100%;aspect-ratio:16/10;object-fit:cover;}
  .longform .figure-inline figcaption{
    font-size:13px;color:var(--faint);text-align:center;padding:12px 16px;border-top:1px solid var(--line-soft);
  }
  .longform .quote-block{
    margin:28px 0;
    padding:18px 22px;
    background:#F7F9FE;
    border-left:4px solid var(--brand-600);
    border-radius:0 var(--r-sm) var(--r-sm) 0;
    font-size:16px;
    color:#33405C;
  }
  .long-card{
    max-width:760px;
    margin:0 auto;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    box-shadow:var(--sh-sm);
    padding:48px;
  }

  /* ---------- FAQ ---------- */
  .faq-list{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-md);
    overflow:hidden;
    max-width:900px;
  }
  .faq-item + .faq-item{border-top:1px solid var(--line);}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:20px 24px;
    text-align:left;
    font-size:16px;
    font-weight:600;
    color:var(--ink);
    transition:color .2s ease,background-color .2s ease;
  }
  .faq-q:hover{color:var(--brand-600);background:#FBFCFE;}
  .faq-item.open .faq-q{color:var(--brand-600);}
  .faq-icon{
    flex-shrink:0;
    width:24px;height:24px;
    display:inline-flex;align-items:center;justify-content:center;
    color:var(--brand-600);
    transition:transform .25s ease;
  }
  .faq-item.open .faq-icon{transform:rotate(180deg);}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .3s ease;
    padding:0 24px;
  }
  .faq-a-inner{
    padding-bottom:20px;
    font-size:15px;
    line-height:1.8;
    color:var(--muted);
    max-width:760px;
  }

  /* ---------- CTA 条 ---------- */
  .cta-band{
    position:relative;
    overflow:hidden;
    background:var(--brand-50);
    border-radius:var(--r-lg);
    padding:44px 48px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:32px;
  }
  .cta-band::before{
    content:"";
    position:absolute;inset:0;
    background-image:repeating-linear-gradient(135deg,rgba(29,91,216,.06) 0 1px,transparent 1px 14px);
    pointer-events:none;
  }
  .cta-band > *{position:relative;z-index:1;}
  .cta-band h2{font-size:28px;font-weight:700;line-height:1.3;}
  .cta-band p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--muted);max-width:620px;}
  .cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex-shrink:0;}
  .back-home{
    margin-top:28px;
    text-align:center;
  }
  .back-home a{
    font-size:14px;
    color:var(--muted);
    border-bottom:1px dashed var(--faint);
    padding-bottom:2px;
    transition:color .2s ease,border-color .2s ease;
  }
  .back-home a:hover{color:var(--brand-600);border-color:var(--brand-600);}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--footer-bg);margin-top:24px;padding:64px 0 0;}
  .footer-grid{
    display:grid;
    grid-template-columns:1.4fr 1fr 1fr 1.1fr;
    gap:40px;
  }
  .footer-title{
    font-size:15px;
    font-weight:700;
    color:#fff;
    margin-bottom:18px;
    letter-spacing:.01em;
  }
  .footer-link{
    position:relative;
    display:inline-block;
    padding:6px 0 6px 12px;
    font-size:14px;
    color:#AEB9D0;
    transition:color .2s ease;
  }
  .footer-link::before{
    content:"";
    position:absolute;
    left:0;top:50%;
    width:3px;height:14px;
    border-radius:2px;
    background:var(--brand-600);
    transform:translateY(-50%) scaleY(0);
    transition:transform .2s ease;
  }
  .footer-link:hover{color:#fff;}
  .footer-link:hover::before{transform:translateY(-50%) scaleY(1);}
  .footer-bottom{
    margin-top:48px;
    border-top:1px solid rgba(255,255,255,.12);
    padding:22px 0 26px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
    font-size:13px;
    color:#93A0BA;
  }

  /* ---------- 移动端抽屉 ---------- */
  .drawer-mask{
    position:fixed;inset:0;
    background:rgba(15,26,51,.45);
    opacity:0;visibility:hidden;
    transition:opacity .3s ease,visibility .3s ease;
    z-index:80;
  }
  .drawer-mask.open{opacity:1;visibility:visible;}
  .mobile-drawer{
    position:fixed;
    top:0;right:0;
    height:100%;
    width:84vw;
    max-width:360px;
    background:#fff;
    z-index:90;
    transform:translateX(100%);
    transition:transform .3s ease;
    display:flex;
    flex-direction:column;
    padding:22px 20px 20px;
    overflow-y:auto;
  }
  .mobile-drawer.open{transform:translateX(0);}
  .drawer-head{
    display:flex;align-items:center;justify-content:space-between;
    padding-bottom:18px;border-bottom:1px solid var(--line);
    margin-bottom:16px;
  }
  .drawer-close{
    width:44px;height:44px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:var(--r-sm);
    color:var(--muted);
  }
  .drawer-close:hover{background:var(--line-soft);color:var(--ink);}
  .drawer-nav{display:flex;flex-direction:column;gap:4px;}
  .drawer-nav a{
    display:flex;align-items:center;
    min-height:48px;
    padding:0 14px;
    border-radius:var(--r-sm);
    font-size:16px;
    font-weight:500;
    color:var(--ink);
    transition:background-color .2s ease,color .2s ease;
  }
  .drawer-nav a:hover{background:var(--line-soft);color:var(--brand-600);}
  .drawer-nav a.active{background:var(--brand-50);color:var(--brand-600);font-weight:600;}
  .drawer-foot{margin-top:auto;padding-top:24px;border-top:1px solid var(--line);display:grid;gap:10px;}

  /* ---------- 响应式 ---------- */
  @media (max-width:1024px){
    .container-x{padding:0 24px;}
    .nav-links{display:none;}
    .nav-actions{display:none;}
    .nav-toggle{display:inline-flex;}
    .header-inner{height:64px;}
    .overview-grid{grid-template-columns:1fr;gap:32px;}
    .split{grid-template-columns:1fr;gap:28px;}
    .page-hero h1{font-size:34px;}
    .section{padding:72px 0;}
    .cta-band{flex-direction:column;align-items:flex-start;padding:36px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  }
  @media (max-width:768px){
    .container-x{padding:0 16px;}
    .header-inner{height:60px;}
    .logo-text{font-size:16px;}
    .page-hero-inner{min-height:200px;padding:28px 0 32px;}
    .page-hero h1{font-size:28px;line-height:1.25;}
    .page-hero-desc{font-size:15px;margin-top:12px;}
    .section{padding:56px 0;}
    .section-head h2{font-size:23px;}
    .section-head p{font-size:15px;}
    .stat-grid{grid-template-columns:1fr;gap:12px;}
    .stat-value{font-size:26px;}
    .long-card{padding:20px;border-radius:var(--r-md);}
    .longform{font-size:16px;}
    .longform h2{font-size:19px;}
    .data-table{min-width:840px;}
    .data-table thead th,
    .data-table tbody td{padding:12px 14px;font-size:14px;}
    .data-table thead th:first-child,
    .data-table tbody td:first-child{
      position:sticky;left:0;z-index:2;
      background:inherit;
      box-shadow:1px 0 0 var(--line-soft);
    }
    .data-table thead th:first-child{background:var(--brand-50);}
    .data-table tbody tr:nth-child(odd) td:first-child{background:#fff;}
    .data-table tbody tr:nth-child(even) td:first-child{background:#FAFBFE;}
    .cta-band{padding:28px 22px;border-radius:var(--r-md);}
    .cta-band h2{font-size:22px;}
    .faq-q{padding:16px 18px;font-size:15px;}
    .faq-a{padding:0 18px;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
    .btn{height:46px;padding:0 20px;font-size:15px;}
    .btn-lg{height:50px;padding:0 24px;}
    .cta-actions{width:100%;}
    .cta-actions .btn{flex:1;min-width:140px;}
  }
  @media (max-width:520px){
    .logo-text{font-size:15px;}
    .logo-mark{width:30px;height:30px;}
    .page-hero h1{font-size:24px;}
    .stat-card{padding:16px;}
  }

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