/* roulang page: index */
:root{
  --brand:#1652f0;
  --brand-dark:#0d3ac0;
  --brand-soft:#eef3ff;
  --accent:#ff7a1a;
  --accent-soft:#fff2e6;
  --ink:#101b33;
  --ink-2:#31405e;
  --muted:#6b7891;
  --line:#e3e8f2;
  --bg:#f6f8fd;
  --card:#ffffff;
  --radius-s:10px;
  --radius-m:16px;
  --radius-l:24px;
  --shadow-s:0 2px 8px rgba(16,27,51,.06);
  --shadow-m:0 12px 32px rgba(16,27,51,.10);
  --shadow-l:0 24px 56px rgba(16,27,51,.14);
  --space:24px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  font-size:16px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;font-size:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(22,82,240,.35);outline-offset:2px;border-radius:8px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
.section{padding:76px 0;}
.section--tight{padding:56px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--brand);background:var(--brand-soft);
  padding:6px 14px;border-radius:999px;margin-bottom:16px;
}
.eyebrow--accent{color:#c2570a;background:var(--accent-soft);}
h2.section-title{font-size:32px;line-height:1.35;font-weight:800;letter-spacing:-.01em;}
.section-sub{margin-top:14px;color:var(--muted);font-size:16px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:22px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(140deg,var(--brand),#4b7bff 60%,var(--accent));
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:17px;box-shadow:var(--shadow-s);
}
.brand-text{font-weight:800;font-size:17px;letter-spacing:-.01em;white-space:nowrap;}
.brand-text small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.08em;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-links a{
  padding:9px 14px;border-radius:999px;font-size:14.5px;font-weight:600;color:var(--ink-2);
  transition:background .2s ease,color .2s ease;
  white-space:nowrap;
}
.nav-links a:hover{background:var(--brand-soft);color:var(--brand);}
.nav-links a.active{background:var(--ink);color:#fff;}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  background:#f1f4fb;border:1px solid var(--line);
  border-radius:999px;padding:8px 14px;min-width:190px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px rgba(22,82,240,.12);}
.nav-search i{color:var(--muted);font-size:13px;}
.nav-search input{border:none;background:transparent;outline:none;width:100%;font-size:14px;color:var(--ink);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;font-weight:700;cursor:pointer;border:none;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;padding:11px 20px;font-size:14.5px;box-shadow:0 10px 22px rgba(22,82,240,.24);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 14px 28px rgba(22,82,240,.3);}
.btn-accent{background:var(--accent);color:#fff;padding:11px 20px;font-size:14.5px;box-shadow:0 10px 22px rgba(255,122,26,.26);}
.btn-accent:hover{background:#ea6a0c;transform:translateY(-1px);}
.btn-ghost{background:#fff;color:var(--ink);padding:11px 20px;font-size:14.5px;border:1px solid var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-lg{padding:15px 30px;font-size:16px;}
.btn:active{transform:translateY(0) scale(.99);}
.nav-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;width:42px;height:42px;color:var(--ink);cursor:pointer;}
.mobile-menu{display:none;border-top:1px solid var(--line);background:#fff;}
.mobile-menu.open{display:block;}
.mobile-menu a{display:block;padding:14px 20px;font-weight:600;color:var(--ink-2);border-bottom:1px solid var(--line);}
.mobile-menu a.active{color:var(--brand);}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background-image:linear-gradient(115deg,rgba(9,20,48,.92) 0%,rgba(11,32,86,.86) 46%,rgba(9,20,48,.72) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.hero-inner{position:relative;z-index:2;padding:96px 0 88px;display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
  padding:7px 15px;border-radius:999px;color:#dce6ff;margin-bottom:20px;
}
.hero h1{font-size:44px;line-height:1.24;font-weight:800;letter-spacing:-.02em;}
.hero h1 span{color:#ffcb91;}
.hero p.lead{margin-top:20px;font-size:17px;color:#c8d4ee;max-width:620px;}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px;}
.hero-points{margin-top:34px;display:flex;flex-wrap:wrap;gap:26px;}
.hero-points div{display:flex;align-items:center;gap:9px;font-size:14.5px;color:#c8d4ee;}
.hero-points i{color:#7fe0b0;}
.hero-card{
  background:rgba(255,255,255,.97);color:var(--ink);border-radius:var(--radius-l);
  padding:28px;box-shadow:var(--shadow-l);
}
.hero-card h3{font-size:18px;font-weight:800;margin-bottom:6px;}
.hero-card p.hint{font-size:13.5px;color:var(--muted);margin-bottom:20px;}
.step-mini{display:flex;gap:14px;padding:13px 0;border-bottom:1px dashed var(--line);}
.step-mini:last-of-type{border-bottom:none;}
.step-mini .num{
  width:28px;height:28px;flex-shrink:0;border-radius:9px;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;
}
.step-mini b{display:block;font-size:14.5px;font-weight:700;}
.step-mini span{font-size:13px;color:var(--muted);}
.hero-card .btn{width:100%;margin-top:20px;}

/* ---------- stats ---------- */
.stats{background:#fff;border-bottom:1px solid var(--line);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:36px 0;}
.stat b{display:block;font-size:28px;font-weight:800;color:var(--brand);letter-spacing:-.02em;}
.stat span{font-size:13.5px;color:var(--muted);}

/* ---------- category cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.cat-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-m);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-m);border-color:#cfdcff;}
.cat-card .thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:#e9eefb;}
.cat-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.cat-card:hover .thumb img{transform:scale(1.05);}
.tag{
  display:inline-block;font-size:12px;font-weight:700;padding:4px 11px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);
}
.tag--accent{background:var(--accent-soft);color:#c2570a;}
.cat-card .body{padding:22px;display:flex;flex-direction:column;flex:1;gap:12px;}
.cat-card h3{font-size:19px;font-weight:800;}
.cat-card p{font-size:14.5px;color:var(--muted);flex:1;}
.cat-card .more{font-size:14px;font-weight:700;color:var(--brand);display:inline-flex;align-items:center;gap:7px;}
.cat-card .more i{transition:transform .2s ease;}
.cat-card:hover .more i{transform:translateX(4px);}

/* ---------- flow ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:flow;}
.flow-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
  padding:26px 22px;position:relative;transition:box-shadow .2s ease,transform .2s ease;
}
.flow-item:hover{box-shadow:var(--shadow-m);transform:translateY(-4px);}
.flow-item .idx{
  width:38px;height:38px;border-radius:12px;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:16px;
}
.flow-item h3{font-size:16.5px;font-weight:800;margin-bottom:8px;}
.flow-item p{font-size:14px;color:var(--muted);}

/* ---------- safety (dark) ---------- */
.safety{
  color:#fff;
  background-image:linear-gradient(120deg,rgba(9,20,48,.94),rgba(16,42,104,.88)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-radius:var(--radius-l);
  padding:52px;
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
}
.safety h2{font-size:28px;font-weight:800;line-height:1.35;}
.safety p{margin-top:16px;color:#c2cfeb;font-size:15px;}
.safety-list{margin-top:24px;display:grid;gap:13px;}
.safety-list li{display:flex;gap:11px;font-size:14.5px;color:#dbe4f7;}
.safety-list i{color:#7fe0b0;margin-top:5px;}
.safety-media{border-radius:var(--radius-m);overflow:hidden;box-shadow:var(--shadow-l);}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px;margin:0 auto;display:grid;gap:14px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;}
.faq-item.open{border-color:#c9d8ff;box-shadow:var(--shadow-s);}
.faq-q{
  width:100%;text-align:left;background:transparent;border:none;cursor:pointer;
  padding:20px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16px;font-weight:700;color:var(--ink);
}
.faq-q i{color:var(--brand);transition:transform .25s ease;flex-shrink:0;}
.faq-item.open .faq-q i{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a p{padding:0 24px 22px;color:var(--muted);font-size:14.5px;}

/* ---------- news / cms ---------- */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
  padding:24px;display:flex;flex-direction:column;gap:12px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-m);border-color:#cfdcff;}
.news-card h3{font-size:17px;font-weight:800;line-height:1.5;}
.news-card h3 a:hover{color:var(--brand);}
.news-card p{font-size:14px;color:var(--muted);}
.news-meta{display:flex;align-items:center;gap:14px;font-size:12.5px;color:var(--muted);margin-top:auto;}
.news-meta .tag{font-size:11.5px;padding:3px 10px;}
.empty-tip{
  background:#fff;border:1px dashed var(--line);border-radius:var(--radius-m);
  padding:44px;text-align:center;color:var(--muted);font-size:15px;
}

/* ---------- cta ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--brand) 0%,#3b6bff 55%,#1b3fd6 100%);
  border-radius:var(--radius-l);color:#fff;padding:54px;text-align:center;
  box-shadow:var(--shadow-l);
}
.cta-band h2{font-size:30px;font-weight:800;}
.cta-band p{margin:16px auto 0;max-width:640px;color:#dbe4ff;font-size:15.5px;}
.cta-actions{margin-top:30px;display:flex;justify-content:center;gap:14px;flex-wrap:wrap;}
.cta-band .btn-accent{background:#fff;color:var(--brand);box-shadow:0 12px 26px rgba(0,0,0,.18);}
.cta-band .btn-accent:hover{background:#f0f4ff;color:var(--brand-dark);}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff;}

/* ---------- footer ---------- */
.site-footer{background:#0c1730;color:#a9b6d2;margin-top:76px;padding:60px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;}
.site-footer h4{color:#fff;font-size:15px;font-weight:800;margin-bottom:16px;}
.site-footer p{font-size:14px;line-height:1.85;}
.footer-links{display:grid;gap:10px;}
.footer-links a{font-size:14px;color:#a9b6d2;transition:color .2s ease;}
.footer-links a:hover{color:#fff;}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#7f8dab;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px;padding:76px 0 70px;}
  .hero h1{font-size:36px;}
  .nav-search{display:none;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .flow{grid-template-columns:repeat(2,1fr);}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:26px;}
  .safety{grid-template-columns:1fr;padding:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:768px){
  .nav-links{display:none;}
  .nav-toggle{display:flex;align-items:center;justify-content:center;}
  .nav-tools .btn-primary{display:none;}
  .section{padding:56px 0;}
  h2.section-title{font-size:25px;}
  .hero h1{font-size:29px;}
  .hero p.lead{font-size:15.5px;}
  .grid-3{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .flow{grid-template-columns:1fr;}
  .cta-band{padding:38px 22px;}
  .cta-band h2{font-size:23px;}
  .safety{padding:30px 22px;}
  .safety h2{font-size:22px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .stats-grid{grid-template-columns:1fr 1fr;gap:20px;}
  .hero-inner{padding:56px 0 52px;}
  .hero-card{padding:22px;}
  .footer-grid{grid-template-columns:1fr;}
  .faq-q{padding:17px 18px;font-size:15px;}
  .faq-a p{padding:0 18px 18px;}
  .brand-text small{display:none;}
}

/* roulang page: article */
:root{
    --primary:#2f6bff;
    --primary-dark:#1d4ed8;
    --primary-soft:#eaf1ff;
    --accent:#ff7a45;
    --accent-soft:#fff1ea;
    --ink:#101828;
    --ink-2:#475467;
    --ink-3:#98a2b3;
    --bg:#f5f7fb;
    --surface:#ffffff;
    --border:#e4e8f0;
    --border-strong:#d5dbe7;
    --radius-s:10px;
    --radius-m:14px;
    --radius-l:20px;
    --radius-xl:28px;
    --shadow-s:0 1px 2px rgba(16,24,40,.05);
    --shadow-m:0 8px 24px -12px rgba(16,24,40,.18);
    --shadow-l:0 24px 60px -28px rgba(16,24,40,.32);
    --font: "PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;font-family:var(--font);background:var(--bg);color:var(--ink);
    line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border:0;}
  a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,opacity .2s ease;}
  button,input{font-family:inherit;font-size:inherit;}
  h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:800;letter-spacing:-.01em;}
  p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  :focus-visible{outline:3px solid rgba(47,107,255,.45);outline-offset:2px;border-radius:8px;}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

  /* ============ header ============ */
  .site-header{
    position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);
    backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--border);
  }
  .header-inner{display:flex;align-items:center;gap:18px;height:74px;}
  .brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
  .brand-mark{
    width:40px;height:40px;border-radius:13px;display:grid;place-items:center;
    background:linear-gradient(135deg,#2f6bff,#7aa2ff);color:#fff;font-weight:800;font-size:19px;
    box-shadow:0 8px 18px -6px rgba(47,107,255,.65);
  }
  .brand-text{font-size:18px;font-weight:800;letter-spacing:-.02em;white-space:nowrap;}
  .brand-sub{display:block;font-size:11px;font-weight:600;color:var(--ink-3);letter-spacing:.14em;}
  .nav-links{display:flex;align-items:center;gap:4px;margin-left:6px;flex-wrap:nowrap;}
  .nav-links a{
    padding:9px 15px;border-radius:11px;font-size:15px;font-weight:600;color:var(--ink-2);
    white-space:nowrap;
  }
  .nav-links a:hover{background:var(--primary-soft);color:var(--primary-dark);}
  .nav-links a.active{background:var(--primary);color:#fff;box-shadow:0 8px 18px -10px rgba(47,107,255,.9);}
  .header-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
  .nav-search{position:relative;display:flex;align-items:center;}
  .nav-search i{position:absolute;left:13px;color:var(--ink-3);font-size:13px;pointer-events:none;}
  .nav-search input{
    width:210px;height:42px;padding:0 14px 0 36px;border:1px solid var(--border-strong);
    border-radius:12px;background:#fbfcfe;color:var(--ink);transition:border-color .2s,box-shadow .2s;
  }
  .nav-search input::placeholder{color:var(--ink-3);}
  .nav-search input:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px rgba(47,107,255,.14);}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;
    border:1px solid transparent;border-radius:12px;font-weight:700;text-align:center;
    padding:11px 20px;font-size:15px;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
  }
  .btn:active{transform:translateY(1px) scale(.99);}
  .btn-primary{background:var(--primary);color:#fff;box-shadow:0 12px 24px -14px rgba(47,107,255,1);}
  .btn-primary:hover{background:var(--primary-dark);box-shadow:0 16px 30px -14px rgba(29,78,216,1);}
  .btn-accent{background:linear-gradient(135deg,#ff8a4c,#ff6a2b);color:#fff;box-shadow:0 12px 26px -14px rgba(255,106,43,1);}
  .btn-accent:hover{filter:brightness(1.05);}
  .btn-ghost{background:#fff;color:var(--ink-2);border-color:var(--border-strong);}
  .btn-ghost:hover{color:var(--primary);border-color:var(--primary);background:var(--primary-soft);}
  .btn-white{background:#fff;color:var(--primary-dark);}
  .btn-white:hover{background:#eef3ff;}
  .nav-toggle{
    display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--border-strong);
    background:#fff;color:var(--ink);cursor:pointer;
  }
  @media (max-width:1080px){
    .nav-search{display:none;}
  }
  @media (max-width:980px){
    .nav-toggle{display:grid;place-items:center;}
    .header-right .btn-ghost{display:none;}
    .nav-links{
      position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--border);
      flex-direction:column;align-items:stretch;gap:2px;padding:12px 20px 18px;margin:0;
      box-shadow:var(--shadow-m);display:none;
    }
    .nav-links.open{display:flex;}
    .nav-links a{padding:12px 14px;font-size:16px;}
  }
  @media (max-width:520px){
    .header-inner{height:66px;gap:10px;}
    .brand-text{font-size:15px;}
    .brand-sub{display:none;}
    .brand-mark{width:36px;height:36px;border-radius:11px;font-size:17px;}
    .header-right .btn-accent{padding:10px 14px;font-size:14px;}
  }

  /* ============ hero ============ */
  .page-hero{
    position:relative;overflow:hidden;color:#fff;
    background-image:linear-gradient(115deg,rgba(9,20,48,.93) 0%,rgba(17,42,96,.88) 48%,rgba(47,107,255,.78) 100%),url('/assets/images/backpic/back-2.webp');
    background-size:cover;background-position:center;
  }
  .page-hero::after{
    content:"";position:absolute;inset:auto -80px -160px auto;width:420px;height:420px;border-radius:50%;
    background:radial-gradient(circle,rgba(255,138,76,.42),transparent 65%);
  }
  .hero-inner{position:relative;z-index:2;padding:56px 0 60px;}
  .breadcrumb{display:flex;align-items:center;gap:9px;font-size:13.5px;color:rgba(255,255,255,.72);margin-bottom:18px;flex-wrap:wrap;}
  .breadcrumb a:hover{color:#fff;}
  .breadcrumb i{font-size:10px;color:rgba(255,255,255,.45);}
  .hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px;}
  .chip{
    display:inline-flex;align-items:center;gap:7px;padding:6px 14px;border-radius:999px;
    font-size:13px;font-weight:700;background:rgba(255,255,255,.15);color:#fff;
    border:1px solid rgba(255,255,255,.24);backdrop-filter:blur(6px);
  }
  .chip-accent{background:rgba(255,138,76,.24);border-color:rgba(255,138,76,.5);color:#ffd8c4;}
  .page-hero h1{font-size:40px;max-width:880px;letter-spacing:-.025em;}
  .hero-lead{margin-top:18px;font-size:16.5px;line-height:1.95;color:rgba(255,255,255,.86);max-width:880px;}
  .hero-meta{
    display:flex;flex-wrap:wrap;gap:22px;margin-top:26px;padding-top:22px;
    border-top:1px solid rgba(255,255,255,.2);font-size:14px;color:rgba(255,255,255,.8);
  }
  .hero-meta span{display:inline-flex;align-items:center;gap:8px;}
  .hero-meta i{color:#8fb4ff;}
  @media (max-width:1024px){ .page-hero h1{font-size:33px;} }
  @media (max-width:768px){
    .hero-inner{padding:40px 0 44px;}
    .page-hero h1{font-size:27px;}
    .hero-lead{font-size:15.5px;}
  }
  @media (max-width:520px){
    .page-hero h1{font-size:23px;}
    .hero-inner{padding:32px 0 36px;}
  }

  /* ============ section basics ============ */
  .section{padding:60px 0;}
  .section-tight{padding:44px 0;}
  .section-head{max-width:720px;margin-bottom:32px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:800;letter-spacing:.16em;
    color:var(--primary);text-transform:uppercase;margin-bottom:12px;
  }
  .eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--primary);}
  .section-head h2{font-size:29px;}
  .section-head p{margin-top:12px;color:var(--ink-2);font-size:15.5px;}
  @media (max-width:520px){ .section-head h2{font-size:23px;} .section{padding:44px 0;} }

  /* ============ article layout ============ */
  .article-wrap{margin-top:-34px;position:relative;z-index:5;}
  .article-layout{display:grid;grid-template-columns:minmax(0,1fr) 336px;gap:30px;align-items:start;}
  .panel{
    background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);
    box-shadow:var(--shadow-l);padding:38px 40px;
  }
  .article-body{font-size:16.5px;color:#28313f;}
  .article-body > * + *{margin-top:20px;}
  .article-body p{line-height:2;}
  .article-body h2{
    font-size:24px;margin-top:44px;padding-left:16px;position:relative;color:var(--ink);
  }
  .article-body h2::before{
    content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;border-radius:4px;
    background:linear-gradient(180deg,#2f6bff,#8fb4ff);
  }
  .article-body h3{font-size:19px;margin-top:32px;color:var(--ink);}
  .article-body h4{font-size:17px;margin-top:26px;color:var(--ink);}
  .article-body ul,.article-body ol{padding-left:0;display:grid;gap:12px;}
  .article-body ul li,.article-body ol li{
    position:relative;padding-left:30px;line-height:1.95;color:var(--ink-2);
  }
  .article-body ul li::before{
    content:"";position:absolute;left:6px;top:13px;width:8px;height:8px;border-radius:3px;
    background:var(--primary);box-shadow:0 0 0 4px rgba(47,107,255,.14);
  }
  .article-body ol{counter-reset:num;}
  .article-body ol li{counter-increment:num;}
  .article-body ol li::before{
    content:counter(num);position:absolute;left:0;top:4px;width:21px;height:21px;border-radius:7px;
    background:var(--primary-soft);color:var(--primary-dark);font-size:12px;font-weight:800;
    display:grid;place-items:center;
  }
  .article-body blockquote{
    margin:28px 0;padding:20px 24px;background:var(--primary-soft);border-left:4px solid var(--primary);
    border-radius:0 var(--radius-m) var(--radius-m) 0;color:#1b2a52;font-weight:600;
  }
  .article-body img{border-radius:var(--radius-l);margin:28px 0;box-shadow:var(--shadow-m);}
  .article-body a{color:var(--primary-dark);font-weight:700;border-bottom:2px solid rgba(47,107,255,.3);}
  .article-body a:hover{border-bottom-color:var(--primary);}
  .article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;overflow:hidden;border-radius:var(--radius-m);}
  .article-body th,.article-body td{border:1px solid var(--border);padding:12px 14px;text-align:left;}
  .article-body th{background:#f2f6ff;color:var(--ink);font-weight:700;}
  .article-body strong{color:var(--ink);}
  .article-body hr{border:0;height:1px;background:var(--border);margin:36px 0;}

  .empty-state{
    text-align:center;padding:56px 24px;background:#fbfcfe;border:1px dashed var(--border-strong);
    border-radius:var(--radius-l);
  }
  .empty-state i{font-size:34px;color:var(--ink-3);}
  .empty-state h2{font-size:21px;margin-top:16px;}
  .empty-state p{margin:10px auto 22px;color:var(--ink-2);max-width:460px;font-size:15px;}

  /* ============ sidebar ============ */
  .side-stack{display:grid;gap:20px;position:sticky;top:96px;}
  .side-card{
    background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-l);
    padding:24px;box-shadow:var(--shadow-m);
  }
  .side-card h3{font-size:16.5px;display:flex;align-items:center;gap:9px;}
  .side-card h3 i{color:var(--primary);font-size:15px;}
  .side-card p{font-size:14px;color:var(--ink-2);margin-top:10px;}
  .check-list{margin-top:16px;display:grid;gap:13px;}
  .check-list li{display:flex;gap:11px;font-size:14px;color:var(--ink-2);line-height:1.7;}
  .check-list li i{color:#16a34a;margin-top:3px;font-size:14px;}
  .side-card.dark{
    background:linear-gradient(150deg,#111e3d,#1d3f8f);border-color:transparent;color:#fff;
  }
  .side-card.dark h3{color:#fff;}
  .side-card.dark h3 i{color:#8fb4ff;}
  .side-card.dark p{color:rgba(255,255,255,.8);}
  .side-links{margin-top:14px;display:grid;gap:4px;}
  .side-links a{
    display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 12px;
    border-radius:11px;font-size:14.5px;font-weight:600;color:var(--ink-2);
  }
  .side-links a:hover{background:var(--primary-soft);color:var(--primary-dark);}
  .side-links a i{font-size:11px;opacity:.6;}
  @media (max-width:1024px){
    .article-layout{grid-template-columns:1fr;}
    .side-stack{position:static;}
    .panel{padding:30px 26px;}
  }
  @media (max-width:520px){
    .panel{padding:24px 18px;border-radius:var(--radius-l);}
    .article-body{font-size:16px;}
    .article-body h2{font-size:20px;}
    .article-wrap{margin-top:-24px;}
  }

  /* ============ cards ============ */
  .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
  .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
  .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
  .card{
    background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-l);
    padding:26px;box-shadow:var(--shadow-s);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
    display:flex;flex-direction:column;height:100%;
  }
  .card:hover{transform:translateY(-5px);box-shadow:var(--shadow-l);border-color:#cfdcff;}
  .card-icon{
    width:48px;height:48px;border-radius:14px;display:grid;place-items:center;font-size:19px;
    background:var(--primary-soft);color:var(--primary-dark);margin-bottom:16px;
  }
  .card-icon.accent{background:var(--accent-soft);color:#e2560f;}
  .card-icon.green{background:#e8f8ef;color:#128b4c;}
  .card h3{font-size:18px;}
  .card p{margin-top:10px;color:var(--ink-2);font-size:14.5px;line-height:1.85;}
  .num-badge{
    display:inline-grid;place-items:center;width:26px;height:26px;border-radius:9px;
    background:var(--ink);color:#fff;font-size:13px;font-weight:800;margin-bottom:14px;
  }
  .tag{
    display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;
    background:var(--primary-soft);color:var(--primary-dark);font-size:12.5px;font-weight:700;
  }
  .tag-accent{background:var(--accent-soft);color:#c2410c;}
  @media (max-width:1024px){ .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));} }
  @media (max-width:640px){
    .grid-3,.grid-4,.grid-2{grid-template-columns:1fr;}
  }

  /* ============ feature split ============ */
  .split{
    display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;
  }
  .split-media{position:relative;}
  .split-media img{border-radius:var(--radius-xl);box-shadow:var(--shadow-l);width:100%;object-fit:cover;}
  .split-media .float-card{
    position:absolute;left:-18px;bottom:-22px;background:#fff;border-radius:var(--radius-l);
    padding:18px 20px;box-shadow:var(--shadow-l);border:1px solid var(--border);max-width:250px;
  }
  .float-card strong{display:block;font-size:22px;color:var(--primary-dark);}
  .float-card span{font-size:13px;color:var(--ink-2);}
  .feature-list{margin-top:24px;display:grid;gap:16px;}
  .feature-list li{display:flex;gap:14px;}
  .feature-list .fi{
    flex:0 0 40px;height:40px;border-radius:12px;display:grid;place-items:center;
    background:#fff;border:1px solid var(--border);color:var(--primary);box-shadow:var(--shadow-s);
  }
  .feature-list h4{font-size:16px;}
  .feature-list p{font-size:14.5px;color:var(--ink-2);margin-top:5px;}
  @media (max-width:900px){
    .split{grid-template-columns:1fr;gap:34px;}
    .split-media .float-card{position:static;margin-top:18px;max-width:none;}
  }

  /* ============ faq ============ */
  .faq-list{display:grid;gap:12px;max-width:940px;}
  .faq-item{
    background:#fff;border:1px solid var(--border);border-radius:var(--radius-m);
    padding:0 22px;transition:border-color .2s,box-shadow .2s;
  }
  .faq-item[open]{border-color:#cfdcff;box-shadow:var(--shadow-m);}
  .faq-item summary{
    list-style:none;cursor:pointer;padding:19px 0;display:flex;align-items:center;justify-content:space-between;
    gap:16px;font-weight:700;font-size:16px;color:var(--ink);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary i{color:var(--primary);transition:transform .25s ease;font-size:14px;}
  .faq-item[open] summary i{transform:rotate(45deg);}
  .faq-body{padding:0 0 20px;color:var(--ink-2);font-size:15px;line-height:1.95;}
  @media (max-width:520px){ .faq-item{padding:0 16px;} .faq-item summary{font-size:15px;} }

  /* ============ cta ============ */
  .cta-band{
    position:relative;overflow:hidden;border-radius:var(--radius-xl);color:#fff;
    background-image:linear-gradient(110deg,rgba(11,23,52,.94),rgba(29,78,216,.86)),url('/assets/images/backpic/back-3.png');
    background-size:cover;background-position:center;padding:48px 46px;
    display:grid;grid-template-columns:1.4fr .6fr;gap:30px;align-items:center;
    box-shadow:var(--shadow-l);
  }
  .cta-band h2{font-size:27px;}
  .cta-band p{margin-top:12px;color:rgba(255,255,255,.85);font-size:15.5px;max-width:660px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}
  .cta-side{display:grid;gap:12px;}
  .cta-stat{
    background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:var(--radius-m);
    padding:16px 18px;backdrop-filter:blur(6px);
  }
  .cta-stat strong{display:block;font-size:20px;}
  .cta-stat span{font-size:13px;color:rgba(255,255,255,.78);}
  @media (max-width:900px){
    .cta-band{grid-template-columns:1fr;padding:34px 24px;}
    .cta-band h2{font-size:22px;}
  }

  /* ============ footer ============ */
  .site-footer{background:#0c1526;color:rgba(255,255,255,.68);margin-top:20px;padding:56px 0 26px;font-size:14.5px;}
  .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px;}
  .footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
  .footer-brand .brand-mark{background:linear-gradient(135deg,#2f6bff,#7aa2ff);}
  .footer-brand .brand-text{font-size:17px;font-weight:800;color:#fff;}
  .site-footer h4{color:#fff;font-size:15px;margin-bottom:14px;}
  .site-footer p{line-height:1.9;}
  .footer-links{display:grid;gap:10px;}
  .footer-links a{color:rgba(255,255,255,.68);}
  .footer-links a:hover{color:#8fb4ff;}
  .footer-bottom{
    margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
    display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13.5px;
    color:rgba(255,255,255,.55);
  }
  @media (max-width:900px){ .footer-grid{grid-template-columns:1fr 1fr;} }
  @media (max-width:560px){ .footer-grid{grid-template-columns:1fr;gap:26px;} .site-footer{padding:42px 0 22px;} }

/* roulang page: category1 */
:root{
  --brand:#ff6a1a;
  --brand-dark:#dc5104;
  --brand-soft:#fff1e7;
  --ink:#0c1424;
  --ink-2:#18233a;
  --body:#4b5668;
  --muted:#7c8798;
  --line:#e6eaf1;
  --bg:#f6f7fb;
  --white:#ffffff;
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:24px;
  --shadow-sm:0 1px 2px rgba(12,20,36,.05),0 6px 16px rgba(12,20,36,.05);
  --shadow:0 12px 34px rgba(12,20,36,.09);
  --shadow-lg:0 28px 64px rgba(12,20,36,.16);
  --container:1200px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg);
  color:var(--body);
  font-size:16px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;}
h1,h2,h3,h4{color:var(--ink);margin:0;line-height:1.32;font-weight:800;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(12,20,36,.97);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{display:flex;align-items:center;gap:20px;height:74px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,var(--brand),#ffa257);
  color:#fff;display:grid;place-items:center;
  font-weight:800;font-size:18px;
  box-shadow:0 8px 18px rgba(255,106,26,.35);
}
.brand-text{color:#fff;font-weight:800;font-size:17px;white-space:nowrap;letter-spacing:.01em;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:6px;}
.nav-links a{
  color:#a8b4c9;padding:9px 15px;border-radius:999px;
  font-size:15px;font-weight:600;
  transition:color .2s ease,background .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.09);}
.nav-links a.active{color:#fff;background:rgba(255,106,26,.2);box-shadow:inset 0 0 0 1px rgba(255,106,26,.5);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
.search-box{
  display:flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.13);
  border-radius:999px;padding:8px 15px;
  transition:border-color .2s ease,background .2s ease;
}
.search-box:focus-within{border-color:rgba(255,106,26,.75);background:rgba(255,255,255,.13);}
.search-box i{color:#8b98b0;font-size:13px;}
.search-box input{background:none;border:none;outline:none;color:#fff;width:150px;font-size:14px;}
.search-box input::placeholder{color:#7d8aa2;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;padding:11px 22px;
  font-size:15px;font-weight:700;line-height:1.2;
  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:3px solid rgba(255,106,26,.45);outline-offset:2px;}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),#ff9040);
  color:#fff;box-shadow:0 10px 24px rgba(255,106,26,.34);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(255,106,26,.42);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border-color:rgba(255,255,255,.24);color:#e9eef8;}
.btn-ghost:hover{background:rgba(255,255,255,.12);}
.btn-outline{border-color:var(--line);background:#fff;color:var(--ink);}
.btn-outline:hover{border-color:var(--brand);color:var(--brand-dark);transform:translateY(-2px);box-shadow:var(--shadow-sm);}
.btn-lg{padding:14px 30px;font-size:16px;}

/* ---------- Mobile nav ---------- */
.menu-toggle{
  display:none;background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.16);color:#fff;
  width:42px;height:42px;border-radius:12px;cursor:pointer;
}
.mobile-nav{
  display:none;flex-direction:column;gap:6px;
  padding:14px 24px 22px;
  background:#0c1424;border-bottom:1px solid rgba(255,255,255,.08);
}
.mobile-nav a{
  color:#b7c2d6;padding:11px 14px;border-radius:12px;
  font-weight:600;font-size:15px;transition:.2s;
}
.mobile-nav a:hover{background:rgba(255,255,255,.08);color:#fff;}
.mobile-nav a.active{background:rgba(255,106,26,.2);color:#fff;}
.mobile-nav.open{display:flex;}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#d8e0ef;
  background-image:linear-gradient(112deg,rgba(7,13,26,.95) 8%,rgba(9,16,32,.78) 52%,rgba(9,16,32,.62) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  padding:74px 0 88px;
}
.hero::after{
  content:"";position:absolute;right:-140px;top:-120px;
  width:480px;height:480px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,106,26,.32),transparent 66%);
  pointer-events:none;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.15fr .85fr;gap:54px;align-items:center;
}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,106,26,.16);
  border:1px solid rgba(255,106,26,.4);
  color:#ffb27a;border-radius:999px;
  padding:7px 16px;font-size:13.5px;font-weight:700;
  margin-bottom:22px;
}
.hero h1{
  color:#fff;font-size:clamp(30px,4vw,48px);
  line-height:1.2;margin-bottom:20px;letter-spacing:-.02em;
}
.hero h1 em{font-style:normal;color:#ff9a51;}
.hero-lead{font-size:17px;color:#b5c1d6;max-width:620px;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.hero-facts{display:flex;flex-wrap:wrap;gap:30px;}
.hero-fact strong{display:block;color:#fff;font-size:24px;font-weight:800;line-height:1.2;}
.hero-fact span{font-size:13.5px;color:#8b99b3;}

.hero-visual{position:relative;}
.hero-visual img{
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);
  border:1px solid rgba(255,255,255,.12);
}
.float-card{
  position:absolute;left:-24px;bottom:-26px;
  background:rgba(255,255,255,.97);
  border-radius:var(--radius);
  padding:16px 20px;
  box-shadow:var(--shadow-lg);
  display:flex;align-items:center;gap:14px;
  max-width:290px;
}
.float-card .fc-icon{
  width:44px;height:44px;border-radius:13px;flex:0 0 auto;
  background:var(--brand-soft);color:var(--brand-dark);
  display:grid;place-items:center;font-size:18px;
}
.float-card strong{display:block;color:var(--ink);font-size:15px;}
.float-card span{font-size:13px;color:var(--muted);}

/* ---------- Sections ---------- */
.section{padding:76px 0;}
.section-alt{background:#fff;}
.section-dark{background:#0c1424;color:#a9b6cc;}
.section-head{max-width:740px;margin:0 auto 46px;text-align:center;}
.section-head.left{margin-left:0;text-align:left;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:800;letter-spacing:.06em;
  color:var(--brand-dark);background:var(--brand-soft);
  border-radius:999px;padding:6px 15px;margin-bottom:16px;
}
.section-head h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px;}
.section-head p{color:var(--body);font-size:16px;}
.section-dark .section-head h2{color:#fff;}
.section-dark .section-head p{color:#9dabc4;}
.section-dark .eyebrow{background:rgba(255,106,26,.16);color:#ffb27a;}

/* ---------- Grids & cards ---------- */
.grid{display:grid;gap:22px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow-sm);height:100%;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#f3d6c2;}
.card-icon{
  width:50px;height:50px;border-radius:14px;
  background:var(--brand-soft);color:var(--brand-dark);
  display:grid;place-items:center;font-size:20px;margin-bottom:18px;
}
.card h3{font-size:18px;margin-bottom:10px;}
.card p{font-size:14.8px;color:var(--body);}
.card-badge{
  display:inline-block;font-size:12.5px;font-weight:700;
  color:var(--brand-dark);background:var(--brand-soft);
  border-radius:999px;padding:3px 11px;margin-bottom:12px;
}

/* ---------- Scene list ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.scene-item{
  display:flex;gap:16px;align-items:flex-start;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease;
}
.scene-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.scene-item .si-icon{
  width:42px;height:42px;flex:0 0 auto;border-radius:12px;
  background:#eef2ff;color:#3a56c9;
  display:grid;place-items:center;font-size:17px;
}
.scene-item h3{font-size:16.5px;margin-bottom:6px;}
.scene-item p{font-size:14.4px;color:var(--body);}

/* ---------- Steps ---------- */
.step-list{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.step-item{
  display:flex;gap:18px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease;
}
.step-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.step-num{
  flex:0 0 auto;width:50px;height:50px;border-radius:15px;
  background:linear-gradient(135deg,#0c1424,#22314f);
  color:#fff;display:grid;place-items:center;
  font-weight:800;font-size:15px;letter-spacing:.02em;
}
.step-item h3{font-size:17.5px;margin-bottom:8px;}
.step-item p{font-size:14.6px;}

/* ---------- Security band ---------- */
.band{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,#0c1424 0%,#16233d 100%);
  border-radius:var(--radius-lg);
  padding:54px 48px;color:#b3c0d6;
  box-shadow:var(--shadow-lg);
}
.band::before{
  content:"";position:absolute;right:-90px;bottom:-120px;
  width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,106,26,.28),transparent 68%);
}
.band-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
.band h2{color:#fff;font-size:clamp(23px,2.6vw,30px);margin-bottom:16px;}
.band p{font-size:15.5px;color:#a3b1c8;margin-bottom:14px;}
.band-list{display:grid;gap:14px;}
.band-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:#c2cde0;}
.band-list i{color:var(--brand);margin-top:5px;}
.band-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.stat{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius);padding:20px;
}
.stat strong{display:block;color:#fff;font-size:26px;font-weight:800;line-height:1.2;}
.stat span{font-size:13.5px;color:#93a1ba;}

/* ---------- Related cards ---------- */
.rel-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-sm);height:100%;
  display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease;
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.rel-card img{height:172px;width:100%;object-fit:cover;}
.rel-card-body{padding:24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-card h3{font-size:17.5px;}
.rel-card p{font-size:14.5px;color:var(--body);flex:1;}
.rel-link{font-weight:700;color:var(--brand-dark);font-size:14.5px;display:inline-flex;align-items:center;gap:7px;}
.rel-link i{transition:transform .2s ease;}
.rel-card:hover .rel-link i{transform:translateX(4px);}

/* ---------- FAQ ---------- */
.faq-list{max-width:880px;margin:0 auto;display:grid;gap:14px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:6px 24px;box-shadow:var(--shadow-sm);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:#f3d6c2;box-shadow:var(--shadow);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 0;font-weight:700;color:var(--ink);font-size:16.5px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"\002B";font-size:20px;font-weight:700;color:var(--brand);
  flex:0 0 auto;transition:transform .25s ease;
}
.faq-item[open] summary::after{content:"\2212";}
.faq-item p{padding:0 0 20px;font-size:15px;color:var(--body);}
.faq-item summary:focus-visible{outline:3px solid rgba(255,106,26,.4);outline-offset:4px;border-radius:8px;}

/* ---------- CTA ---------- */
.cta-wrap{padding:0 0 84px;}
.cta{
  position:relative;overflow:hidden;
  background-image:linear-gradient(120deg,rgba(12,20,36,.95),rgba(12,20,36,.76)),url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
  border-radius:var(--radius-lg);
  padding:60px 56px;color:#c8d3e6;
  display:grid;grid-template-columns:1.3fr .7fr;gap:40px;align-items:center;
  box-shadow:var(--shadow-lg);
}
.cta h2{color:#fff;font-size:clamp(23px,2.8vw,32px);margin-bottom:14px;}
.cta p{font-size:16px;color:#aab8ce;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}

/* ---------- Footer ---------- */
.site-footer{background:#0b1221;color:#93a1ba;padding:66px 0 26px;border-top:1px solid rgba(255,255,255,.06);}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{width:36px;height:36px;border-radius:11px;font-size:17px;}
.footer-brand .brand-text{font-size:16.5px;}
.site-footer p{font-size:14.5px;color:#8b98b1;line-height:1.8;}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:18px;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{color:#93a1ba;font-size:14.5px;transition:color .2s ease,transform .2s ease;display:inline-block;}
.footer-links a:hover{color:var(--brand);transform:translateX(3px);}
.footer-bottom{
  margin-top:46px;padding-top:24px;
  border-top:1px solid rgba(255,255,255,.08);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;
  font-size:13.5px;color:#76839c;
}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .search-box{display:none;}
  .nav-links a{padding:9px 11px;font-size:14.5px;}
  .hero-grid{grid-template-columns:1fr;gap:46px;}
  .hero-visual{max-width:560px;}
  .float-card{left:16px;bottom:-22px;}
  .band-inner{grid-template-columns:1fr;}
  .cta{grid-template-columns:1fr;padding:48px 36px;}
  .cta-actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:900px){
  .menu-toggle{display:grid;place-items:center;margin-left:auto;}
  .nav-links{display:none;}
  .header-actions{display:none;}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .section{padding:62px 0;}
}
@media (max-width:640px){
  .container{padding:0 18px;}
  .header-inner{height:66px;gap:12px;}
  .brand-text{font-size:15.5px;max-width:150px;overflow:hidden;text-overflow:ellipsis;}
  .hero{padding:52px 0 66px;}
  .hero-lead{font-size:15.5px;}
  .hero-actions .btn{width:100%;}
  .hero-facts{gap:22px;}
  .hero-fact strong{font-size:20px;}
  .float-card{position:static;margin-top:18px;left:auto;bottom:auto;}
  .grid-2,.grid-3,.grid-4,.scene-grid,.step-list{grid-template-columns:1fr;}
  .band{padding:36px 24px;}
  .band-stats{grid-template-columns:1fr;}
  .cta{padding:38px 22px;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .faq-item{padding:4px 18px;}
  .section-head{margin-bottom:34px;}
}

/* roulang page: category2 */
:root{
    --brand:#f97316;
    --brand-dark:#d95f0a;
    --brand-soft:#fff3e8;
    --ink:#101828;
    --ink-2:#344054;
    --muted:#667085;
    --line:#e6e8ee;
    --bg:#ffffff;
    --bg-soft:#f7f8fa;
    --blue:#2563eb;
    --blue-soft:#eef4ff;
    --green:#12b76a;
    --green-soft:#e9f9f0;
    --radius-s:10px;
    --radius:16px;
    --radius-l:24px;
    --shadow-s:0 1px 2px rgba(16,24,40,.06);
    --shadow:0 8px 24px rgba(16,24,40,.08);
    --shadow-l:0 20px 48px rgba(16,24,40,.12);
    --gap:24px;
    --max:1200px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.75;
    color:var(--ink-2);
    background:var(--bg);
  }
  h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.3;font-weight:700;}
  p{margin:0;}
  a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease;}
  img{max-width:100%;display:block;height:auto;}
  ul,ol{margin:0;padding:0;list-style:none;}
  button,input{font:inherit;color:inherit;}
  button{cursor:pointer;background:none;border:none;}
  a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
    outline:2px solid var(--brand);
    outline-offset:3px;
    border-radius:6px;
  }

  .container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}
  .section{padding:80px 0;}
  .section-soft{background:var(--bg-soft);}
  .section-ink{background:var(--ink);color:#cbd5e1;}
  .section-head{max-width:760px;margin-bottom:40px;}
  .section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:600;letter-spacing:.04em;
    color:var(--brand-dark);background:var(--brand-soft);
    padding:6px 14px;border-radius:999px;margin-bottom:16px;
  }
  .section-head h2{font-size:clamp(24px,3vw,34px);letter-spacing:-.01em;}
  .section-head p{margin-top:14px;color:var(--muted);font-size:16px;}

  /* Header */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.92);
    backdrop-filter:saturate(180%) blur(12px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{
    display:flex;align-items:center;gap:24px;
    height:72px;
  }
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand-mark{
    width:36px;height:36px;border-radius:11px;
    display:grid;place-items:center;
    background:linear-gradient(135deg,var(--brand),#fbbf24);
    color:#fff;font-weight:800;font-size:17px;
    box-shadow:0 6px 14px rgba(249,115,22,.32);
  }
  .brand-text{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-.01em;white-space:nowrap;}

  .nav-links{display:flex;align-items:center;gap:6px;margin-left:8px;}
  .nav-links a{
    display:inline-block;
    padding:8px 14px;border-radius:999px;
    font-size:15px;font-weight:500;color:var(--ink-2);
    transition:background .2s ease,color .2s ease;
  }
  .nav-links a:hover{background:var(--bg-soft);color:var(--ink);}
  .nav-links a.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:600;}

  .header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
  .search-box{
    display:flex;align-items:center;gap:8px;
    background:var(--bg-soft);
    border:1px solid var(--line);
    border-radius:999px;
    padding:8px 14px;
    min-width:210px;
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(249,115,22,.14);}
  .search-box i{color:var(--muted);font-size:14px;}
  .search-box input{
    border:none;background:transparent;outline:none;
    font-size:14px;width:100%;color:var(--ink);
  }
  .search-box input::placeholder{color:#98a2b3;}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:11px 20px;border-radius:999px;
    font-size:15px;font-weight:600;
    border:1px solid transparent;
    transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
    white-space:nowrap;
  }
  .btn-primary{
    background:linear-gradient(135deg,var(--brand),#fb923c);
    color:#fff;box-shadow:0 8px 20px rgba(249,115,22,.28);
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(249,115,22,.34);}
  .btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(249,115,22,.28);}
  .btn-ghost{
    background:#fff;color:var(--ink);border-color:var(--line);
  }
  .btn-ghost:hover{border-color:#cfd4dd;background:var(--bg-soft);}
  .btn-light{
    background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.3);
  }
  .btn-light:hover{background:rgba(255,255,255,.24);}
  .btn-sm{padding:9px 16px;font-size:14px;}

  .menu-toggle{
    display:none;
    width:42px;height:42px;border-radius:12px;
    border:1px solid var(--line);background:#fff;
    align-items:center;justify-content:center;
    color:var(--ink);font-size:18px;
  }
  .mobile-drawer{
    display:none;
    border-top:1px solid var(--line);
    background:#fff;
    padding:12px 0 20px;
  }
  .mobile-drawer.open{display:block;}
  .mobile-drawer a{
    display:block;padding:12px 4px;font-size:16px;color:var(--ink-2);
    border-bottom:1px dashed var(--line);
  }
  .mobile-drawer a.active{color:var(--brand-dark);font-weight:600;}

  /* Hero */
  .hero{
    position:relative;
    padding:96px 0 88px;
    background-image:linear-gradient(105deg,rgba(9,13,25,.92) 0%,rgba(9,13,25,.78) 48%,rgba(9,13,25,.55) 100%),
                     url('/assets/images/backpic/back-2.webp');
    background-size:cover;
    background-position:center;
    color:#e2e8f0;
    overflow:hidden;
  }
  .hero::after{
    content:"";position:absolute;inset:auto -10% -60% -10%;height:340px;
    background:radial-gradient(closest-side,rgba(249,115,22,.28),transparent);
    pointer-events:none;
  }
  .hero-grid{
    position:relative;z-index:2;
    display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;
  }
  .hero h1{
    color:#fff;font-size:clamp(30px,4vw,50px);
    letter-spacing:-.02em;margin:14px 0 18px;
  }
  .hero p.lead{
    font-size:17px;color:#cbd5e1;max-width:600px;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
  .hero-facts{
    display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
    margin-top:44px;padding-top:28px;border-top:1px solid rgba(255,255,255,.16);
  }
  .hero-facts strong{display:block;font-size:24px;color:#fff;font-weight:800;}
  .hero-facts span{font-size:13px;color:#94a3b8;}

  .hero-panel{
    background:rgba(255,255,255,.07);
    border:1px solid rgba(255,255,255,.16);
    border-radius:var(--radius-l);
    padding:26px;
    backdrop-filter:blur(6px);
    box-shadow:var(--shadow-l);
  }
  .hero-panel h3{color:#fff;font-size:18px;margin-bottom:6px;}
  .hero-panel p{font-size:14px;color:#b9c2d0;margin-bottom:18px;}
  .checklist li{
    display:flex;gap:12px;align-items:flex-start;
    padding:12px 0;border-bottom:1px dashed rgba(255,255,255,.14);
    font-size:15px;color:#e2e8f0;
  }
  .checklist li:last-child{border-bottom:none;}
  .checklist i{color:var(--brand);margin-top:5px;font-size:14px;}

  /* Cards */
  .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);}
  .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);}
  .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap);}

  .card{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    padding:28px;box-shadow:var(--shadow-s);
    transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
    height:100%;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#dde2ea;}
  .card h3{font-size:19px;margin-bottom:10px;}
  .card p{color:var(--muted);font-size:15px;}
  .icon-box{
    width:48px;height:48px;border-radius:14px;
    display:grid;place-items:center;font-size:20px;
    background:var(--brand-soft);color:var(--brand-dark);
    margin-bottom:18px;
  }
  .icon-box.blue{background:var(--blue-soft);color:var(--blue);}
  .icon-box.green{background:var(--green-soft);color:var(--green);}

  .method-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    overflow:hidden;display:flex;flex-direction:column;
    transition:transform .22s ease,box-shadow .22s ease;
  }
  .method-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
  .method-card .thumb{position:relative;aspect-ratio:16/10;overflow:hidden;}
  .method-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
  .method-card:hover .thumb img{transform:scale(1.05);}
  .method-card .thumb::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(16,24,40,0) 40%,rgba(16,24,40,.55));
  }
  .method-card .body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
  .method-card h3{font-size:18px;}
  .method-card p{font-size:14.5px;color:var(--muted);}
  .method-card .tag{
    position:absolute;top:14px;left:14px;z-index:2;
    background:rgba(255,255,255,.92);color:var(--ink);
    font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px;
  }

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12.5px;font-weight:600;
    padding:4px 12px;border-radius:999px;
    background:var(--bg-soft);color:var(--ink-2);border:1px solid var(--line);
  }
  .badge-warn{background:#fff7ed;color:#c2410c;border-color:#fed7aa;}
  .badge-ok{background:var(--green-soft);color:#07784a;border-color:#bdf0d3;}

  /* Scenarios */
  .scenario-list{display:grid;gap:16px;}
  .scenario{
    display:flex;gap:20px;align-items:flex-start;
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    padding:22px 26px;transition:border-color .2s ease,box-shadow .2s ease;
  }
  .scenario:hover{border-color:#d9dee7;box-shadow:var(--shadow-s);}
  .scenario .num{
    flex-shrink:0;width:38px;height:38px;border-radius:12px;
    display:grid;place-items:center;
    background:var(--ink);color:#fff;font-weight:700;font-size:15px;
  }
  .scenario h3{font-size:17px;margin-bottom:6px;}
  .scenario p{font-size:14.5px;color:var(--muted);}

  /* Steps */
  .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);position:relative;}
  .step{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    padding:26px;position:relative;
  }
  .step .step-index{
    display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.08em;
    color:var(--brand-dark);background:var(--brand-soft);
    padding:4px 10px;border-radius:8px;margin-bottom:16px;
  }
  .step h3{font-size:17px;margin-bottom:8px;}
  .step p{font-size:14.5px;color:var(--muted);}

  /* Split block */
  .split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
  .split-media{
    position:relative;border-radius:var(--radius-l);overflow:hidden;
    box-shadow:var(--shadow-l);
  }
  .split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
  .split-media .caption{
    position:absolute;left:20px;right:20px;bottom:20px;
    background:rgba(16,24,40,.78);color:#fff;
    border-radius:14px;padding:14px 18px;font-size:14px;
    backdrop-filter:blur(4px);
  }
  .split ul.plain-list li{
    display:flex;gap:12px;align-items:flex-start;
    padding:12px 0;border-bottom:1px dashed var(--line);font-size:15px;
  }
  .split ul.plain-list li:last-child{border-bottom:none;}
  .split ul.plain-list i{color:var(--brand);margin-top:5px;}

  /* Alert / dark block */
  .alert-block{
    background:linear-gradient(120deg,#101828,#1d2939);
    border-radius:var(--radius-l);
    padding:48px;color:#cbd5e1;
  }
  .alert-block h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:14px;}
  .alert-block > p{color:#94a3b8;max-width:760px;}
  .alert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:32px;}
  .alert-item{
    background:rgba(255,255,255,.06);
    border:1px solid rgba(255,255,255,.12);
    border-radius:var(--radius);padding:22px;
  }
  .alert-item h3{color:#fff;font-size:16.5px;margin-bottom:8px;}
  .alert-item p{font-size:14.5px;color:#a9b4c4;}

  /* FAQ */
  .faq{display:grid;gap:14px;max-width:900px;margin:0 auto;}
  .faq details{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    padding:0;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq details[open]{border-color:#f6c9a3;box-shadow:var(--shadow-s);}
  .faq summary{
    list-style:none;cursor:pointer;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 24px;font-size:16.5px;font-weight:600;color:var(--ink);
  }
  .faq summary::-webkit-details-marker{display:none;}
  .faq summary::after{
    content:"+";flex-shrink:0;width:28px;height:28px;border-radius:9px;
    display:grid;place-items:center;
    background:var(--bg-soft);color:var(--ink-2);font-weight:600;font-size:18px;
    transition:transform .2s ease,background .2s ease,color .2s ease;
  }
  .faq details[open] summary::after{content:"−";background:var(--brand-soft);color:var(--brand-dark);}
  .faq .answer{padding:0 24px 22px;color:var(--muted);font-size:15px;}

  /* CTA */
  .cta{
    background:linear-gradient(135deg,#f97316,#fb923c 55%,#fbbf24);
    border-radius:var(--radius-l);
    padding:56px;color:#fff;
    display:grid;grid-template-columns:1.4fr .6fr;gap:32px;align-items:center;
    box-shadow:0 24px 56px rgba(249,115,22,.28);
  }
  .cta h2{color:#fff;font-size:clamp(22px,2.8vw,32px);margin-bottom:12px;}
  .cta p{color:rgba(255,255,255,.92);font-size:16px;}
  .cta-actions{display:flex;flex-direction:column;gap:12px;}
  .cta .btn-ghost{background:#fff;border-color:transparent;color:var(--brand-dark);}

  /* Footer */
  .site-footer{background:#0b1220;color:#94a3b8;padding:64px 0 28px;margin-top:0;}
  .footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px;}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
  .footer-brand .brand-mark{box-shadow:none;}
  .footer-brand .brand-text{font-size:17px;font-weight:800;}
  .site-footer p{font-size:14.5px;color:#94a3b8;line-height:1.8;}
  .site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;}
  .footer-links{display:flex;flex-direction:column;gap:10px;}
  .footer-links a{font-size:14.5px;color:#a9b4c4;}
  .footer-links a:hover{color:var(--brand);}
  .footer-bottom{
    margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13.5px;color:#7d8899;
  }

  @media (max-width:1024px){
    .nav-links{display:none;}
    .search-box{display:none;}
    .menu-toggle{display:flex;}
    .hero-grid{grid-template-columns:1fr;gap:36px;}
    .grid-4,.grid-3,.steps,.alert-grid{grid-template-columns:repeat(2,1fr);}
    .split{grid-template-columns:1fr;gap:32px;}
    .cta{grid-template-columns:1fr;padding:40px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  }
  @media (max-width:768px){
    .section{padding:60px 0;}
    .hero{padding:72px 0 64px;}
    .hero-facts{grid-template-columns:1fr;gap:14px;}
    .grid-3,.grid-4,.steps,.alert-grid,.grid-2{grid-template-columns:1fr;}
    .alert-block{padding:32px;}
    .container{padding:0 18px;}
  }
  @media (max-width:520px){
    .header-inner{height:64px;gap:12px;}
    .brand-text{font-size:15.5px;}
    .btn{padding:10px 16px;font-size:14px;}
    .hero h1{font-size:26px;}
    .footer-grid{grid-template-columns:1fr;}
    .faq summary{padding:16px 18px;font-size:15.5px;}
    .faq .answer{padding:0 18px 18px;}
  }

/* roulang page: category3 */
:root{
    --brand:#2b59ff;
    --brand-dark:#1b3fd0;
    --brand-soft:#eaf0ff;
    --accent:#14b8a6;
    --accent-soft:#e6faf7;
    --ink:#0e1726;
    --ink-soft:#49566b;
    --muted:#7b879a;
    --line:#e4e9f2;
    --bg:#f6f8fc;
    --card:#ffffff;
    --radius:20px;
    --radius-sm:14px;
    --radius-xs:10px;
    --shadow-xs:0 2px 8px rgba(16,32,64,.06);
    --shadow-sm:0 10px 26px rgba(16,32,64,.07);
    --shadow-md:0 18px 44px rgba(16,32,64,.10);
    --shadow-lg:0 30px 70px rgba(16,32,64,.16);
    --t:.25s cubic-bezier(.4,0,.2,1);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    background:var(--bg);
    color:var(--ink);
    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,input,select,textarea{font:inherit;color:inherit;}
  h1,h2,h3,h4,p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  body .container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:80;
    background:rgba(255,255,255,.94);
    backdrop-filter:saturate(160%) blur(14px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{display:flex;align-items:center;gap:18px;height:74px;}
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand-mark{
    width:38px;height:38px;border-radius:12px;
    background:linear-gradient(135deg,var(--brand),#6d8bff);
    color:#fff;display:grid;place-items:center;
    font-weight:700;font-size:18px;
    box-shadow:0 8px 18px rgba(43,89,255,.32);
  }
  .brand-text{font-weight:700;font-size:17px;letter-spacing:.2px;white-space:nowrap;}
  .nav-links{display:flex;align-items:center;gap:4px;margin-left:6px;}
  .nav-links a{
    padding:9px 14px;border-radius:999px;
    font-size:15px;color:var(--ink-soft);
    transition:background var(--t),color var(--t),box-shadow var(--t);
    white-space:nowrap;
  }
  .nav-links a:hover{background:var(--brand-soft);color:var(--brand);}
  .nav-links a.active{
    background:var(--brand);color:#fff;
    box-shadow:0 8px 20px rgba(43,89,255,.28);
  }
  .nav-links a:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
  .header-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
  .nav-search{position:relative;display:flex;align-items:center;}
  .nav-search i{position:absolute;left:14px;font-size:13px;color:var(--muted);pointer-events:none;}
  .nav-search input{
    width:186px;height:42px;border-radius:999px;
    border:1px solid var(--line);background:#f4f6fb;
    padding:0 16px 0 36px;font-size:14px;outline:none;
    transition:border-color var(--t),background var(--t),box-shadow var(--t),width var(--t);
  }
  .nav-search input::placeholder{color:#9aa5b6;}
  .nav-search input:focus{width:214px;border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(43,89,255,.13);}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 20px;border-radius:999px;
    font-size:15px;font-weight:600;border:1px solid transparent;
    cursor:pointer;transition:transform var(--t),background var(--t),color var(--t),box-shadow var(--t),border-color var(--t);
    white-space:nowrap;
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 12px 24px rgba(43,89,255,.28);}
  .btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);}
  .btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(43,89,255,.26);}
  .btn-ghost{background:#fff;border-color:var(--line);color:var(--ink);}
  .btn-ghost:hover{border-color:#bccdff;color:var(--brand);background:var(--brand-soft);}
  .btn-light{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.35);}
  .btn-light:hover{background:rgba(255,255,255,.24);transform:translateY(-1px);}
  .btn-white{background:#fff;color:var(--brand);box-shadow:0 14px 30px rgba(6,16,40,.22);}
  .btn-white:hover{transform:translateY(-1px);color:var(--brand-dark);}
  .btn:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
  .nav-toggle{
    display:none;width:44px;height:44px;border-radius:12px;
    border:1px solid var(--line);background:#fff;color:var(--ink);
    cursor:pointer;align-items:center;justify-content:center;font-size:16px;
  }

  /* ---------- hero ---------- */
  .hero{
    position:relative;overflow:hidden;color:#fff;
    padding:86px 0 78px;
    background-image:url('/assets/images/backpic/back-2.webp');
    background-size:cover;background-position:center;
  }
  .hero::before{
    content:"";position:absolute;inset:0;
    background:linear-gradient(120deg,rgba(8,16,38,.94) 0%,rgba(20,42,110,.86) 52%,rgba(15,104,116,.74) 100%);
  }
  .hero .container{position:relative;z-index:2;}
  .crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:22px;}
  .crumb a{color:rgba(255,255,255,.86);}
  .crumb a:hover{color:#fff;}
  .hero h1{font-size:44px;line-height:1.25;font-weight:800;letter-spacing:.5px;}
  .hero-sub{margin-top:18px;font-size:17px;line-height:1.85;color:rgba(255,255,255,.86);max-width:720px;}
  .hero-search{
    margin-top:32px;max-width:560px;position:relative;display:flex;align-items:center;
  }
  .hero-search i{position:absolute;left:20px;color:#8595ad;}
  .hero-search input{
    width:100%;height:56px;border-radius:999px;border:1px solid rgba(255,255,255,.28);
    background:rgba(255,255,255,.12);color:#fff;padding:0 150px 0 48px;font-size:15px;outline:none;
    transition:background var(--t),border-color var(--t),box-shadow var(--t);
  }
  .hero-search input::placeholder{color:rgba(255,255,255,.6);}
  .hero-search input:focus{background:rgba(255,255,255,.2);border-color:rgba(255,255,255,.6);box-shadow:0 0 0 5px rgba(255,255,255,.12);}
  .hero-search button{
    position:absolute;right:7px;height:42px;padding:0 22px;border:0;border-radius:999px;
    background:#fff;color:var(--brand);font-weight:700;cursor:pointer;transition:background var(--t),transform var(--t);
  }
  .hero-search button:hover{background:#eaf0ff;transform:translateX(-1px);}
  .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
  .tag{
    display:inline-flex;align-items:center;gap:6px;
    padding:7px 15px;border-radius:999px;font-size:13.5px;
    background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.24);color:rgba(255,255,255,.92);
    transition:background var(--t),border-color var(--t);
  }
  .tag:hover{background:rgba(255,255,255,.24);border-color:rgba(255,255,255,.5);}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}

  /* ---------- sections ---------- */
  .section{padding:76px 0;}
  .section.alt{background:#fff;}
  .section-head{max-width:760px;margin-bottom:40px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;
    color:var(--brand);background:var(--brand-soft);
    padding:6px 14px;border-radius:999px;margin-bottom:16px;
  }
  .section-title{font-size:32px;line-height:1.35;font-weight:800;letter-spacing:.3px;}
  .section-desc{margin-top:14px;color:var(--ink-soft);font-size:16px;}

  .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
  .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;}
  .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}

  .card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
    padding:26px;box-shadow:var(--shadow-xs);
    transition:transform var(--t),box-shadow var(--t),border-color var(--t);
    height:100%;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#d5e0ff;}
  .card-icon{
    width:48px;height:48px;border-radius:14px;display:grid;place-items:center;
    background:var(--brand-soft);color:var(--brand);font-size:19px;margin-bottom:18px;
  }
  .card-icon.green{background:var(--accent-soft);color:#0f9488;}
  .card h3{font-size:18px;font-weight:700;margin-bottom:10px;}
  .card p{color:var(--ink-soft);font-size:15px;}
  .card-link{
    display:inline-flex;align-items:center;gap:7px;margin-top:16px;
    font-size:14px;font-weight:600;color:var(--brand);
  }
  .card-link i{font-size:12px;transition:transform var(--t);}
  .card:hover .card-link i{transform:translateX(4px);}

  /* ---------- steps ---------- */
  .steps-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;}
  .steps{display:flex;flex-direction:column;gap:16px;}
  .step{
    display:flex;gap:18px;padding:20px 22px;border-radius:var(--radius-sm);
    background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-xs);
    transition:border-color var(--t),box-shadow var(--t),transform var(--t);
  }
  .step:hover{border-color:#c9d8ff;box-shadow:var(--shadow-sm);transform:translateX(4px);}
  .step-no{
    flex:0 0 40px;height:40px;border-radius:12px;
    background:linear-gradient(135deg,var(--brand),#6d8bff);color:#fff;
    display:grid;place-items:center;font-weight:700;font-size:16px;
  }
  .step h3{font-size:17px;font-weight:700;margin-bottom:6px;}
  .step p{font-size:14.5px;color:var(--ink-soft);}
  .media-frame{
    border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-md);
    border:1px solid var(--line);background:#fff;
  }
  .media-frame img{width:100%;height:100%;object-fit:cover;}

  /* ---------- stat ---------- */
  .stat-strip{
    display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
    gap:18px;margin-top:34px;
  }
  .stat{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
    padding:22px;box-shadow:var(--shadow-xs);
  }
  .stat strong{display:block;font-size:26px;font-weight:800;color:var(--brand);letter-spacing:.5px;}
  .stat span{display:block;margin-top:6px;font-size:14px;color:var(--ink-soft);}

  /* ---------- channel ---------- */
  .channel{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    padding:28px;box-shadow:var(--shadow-xs);
    transition:transform var(--t),box-shadow var(--t),border-color var(--t);
    height:100%;
  }
  .channel:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#d5e0ff;}
  .channel .badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12.5px;font-weight:700;color:#0f9488;background:var(--accent-soft);
    padding:5px 12px;border-radius:999px;margin-bottom:16px;
  }
  .channel h3{font-size:19px;font-weight:700;margin-bottom:10px;}
  .channel p{color:var(--ink-soft);font-size:15px;}
  .channel ul{margin-top:16px;display:flex;flex-direction:column;gap:9px;}
  .channel li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-soft);}
  .channel li i{color:var(--brand);font-size:13px;margin-top:6px;}

  /* ---------- faq ---------- */
  .faq-list{display:flex;flex-direction:column;gap:14px;}
  .faq-item{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
    overflow:hidden;transition:border-color var(--t),box-shadow var(--t);
  }
  .faq-item[open]{border-color:#c9d8ff;box-shadow:var(--shadow-sm);}
  .faq-item summary{
    list-style:none;cursor:pointer;padding:19px 24px;
    display:flex;align-items:center;justify-content:space-between;gap:18px;
    font-size:16.5px;font-weight:600;color:var(--ink);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{
    content:"+";flex:0 0 28px;height:28px;border-radius:9px;
    display:grid;place-items:center;font-size:18px;font-weight:600;
    background:var(--brand-soft);color:var(--brand);
    transition:background var(--t),color var(--t);
  }
  .faq-item[open] summary::after{content:"−";background:var(--brand);color:#fff;}
  .faq-item summary:hover{color:var(--brand);}
  .faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:-3px;}
  .faq-body{padding:0 24px 22px;color:var(--ink-soft);font-size:15px;line-height:1.85;}

  /* ---------- form ---------- */
  .ask-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:start;}
  .ask-form{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    padding:30px;box-shadow:var(--shadow-sm);
  }
  .form-row{margin-bottom:18px;}
  .form-row label{display:block;font-size:14px;font-weight:700;margin-bottom:8px;color:var(--ink);}
  .form-row input,.form-row select,.form-row textarea{
    width:100%;border:1px solid var(--line);border-radius:var(--radius-xs);
    background:#f7f9fd;padding:12px 14px;font-size:15px;outline:none;
    transition:border-color var(--t),background var(--t),box-shadow var(--t);
  }
  .form-row textarea{resize:vertical;min-height:118px;line-height:1.7;}
  .form-row input:focus,.form-row select:focus,.form-row textarea:focus{
    border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(43,89,255,.12);
  }
  .form-hint{
    display:flex;gap:9px;align-items:flex-start;
    font-size:13.5px;color:#a35a00;background:#fff7e8;border:1px solid #ffe3b8;
    border-radius:var(--radius-xs);padding:12px 14px;margin-bottom:20px;
  }
  .form-hint i{margin-top:4px;}
  .form-done{
    margin-top:16px;font-size:14.5px;color:#0f7a56;background:#e9faf1;
    border:1px solid #c5f0dc;border-radius:var(--radius-xs);padding:12px 14px;
  }
  .ask-side{display:flex;flex-direction:column;gap:20px;}
  .ask-side .media-frame img{height:230px;}

  /* ---------- cta ---------- */
  .cta{
    position:relative;overflow:hidden;color:#fff;
    border-radius:26px;padding:56px 48px;
    background-image:url('/assets/images/backpic/back-3.png');
    background-size:cover;background-position:center;
    box-shadow:var(--shadow-lg);
  }
  .cta::before{
    content:"";position:absolute;inset:0;
    background:linear-gradient(115deg,rgba(10,20,48,.94),rgba(31,60,150,.86) 60%,rgba(17,120,128,.8));
  }
  .cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;}
  .cta h2{font-size:30px;font-weight:800;line-height:1.4;}
  .cta p{margin-top:14px;font-size:16px;color:rgba(255,255,255,.86);max-width:640px;}
  .cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

  /* ---------- footer ---------- */
  .site-footer{background:#0b1424;color:#c2cbdc;padding:66px 0 26px;margin-top:80px;}
  .footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:40px;}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
  .footer-brand .brand-text{font-size:17px;font-weight:700;}
  .site-footer p{font-size:14.5px;line-height:1.85;color:#98a4b9;}
  .site-footer h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.4px;}
  .footer-links{display:flex;flex-direction:column;gap:11px;}
  .footer-links a{font-size:14.5px;color:#b3bdd0;transition:color var(--t),transform var(--t);display:inline-block;}
  .footer-links a:hover{color:#fff;transform:translateX(3px);}
  .footer-bottom{
    margin-top:42px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
    display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
    font-size:13px;color:#7f8ba0;
  }

  /* ---------- responsive ---------- */
  @media (max-width:1080px){
    .nav-links a{padding:8px 11px;font-size:14px;}
    .nav-search input{width:150px;}
    .nav-search input:focus{width:170px;}
    .grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}
    .hero h1{font-size:38px;}
    .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px;}
  }
  @media (max-width:960px){
    .header-inner{height:68px;}
    .nav-toggle{display:inline-flex;}
    .nav-links{
      position:absolute;top:68px;left:0;right:0;margin:0;
      flex-direction:column;align-items:stretch;gap:6px;
      background:#fff;padding:14px 20px 20px;
      border-bottom:1px solid var(--line);box-shadow:var(--shadow-md);
      display:none;
    }
    .nav-links.open{display:flex;}
    .nav-links a{padding:12px 14px;font-size:15px;}
    .nav-search{display:none;}
    .steps-wrap,.ask-wrap{grid-template-columns:1fr;gap:30px;}
    .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
    .grid-2{grid-template-columns:1fr;}
    .stat-strip{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
    .btn-ghost.d-none-mobile{display:none;}
  }
  @media (max-width:640px){
    .hero{padding:60px 0 54px;}
    .hero h1{font-size:29px;line-height:1.35;}
    .hero-sub{font-size:15.5px;}
    .hero-search input{height:52px;padding-right:118px;font-size:14px;}
    .hero-search button{height:40px;padding:0 16px;font-size:14px;}
    .section{padding:54px 0;}
    .section-title{font-size:24px;}
    .grid-3,.grid-4{grid-template-columns:1fr;}
    .cta{padding:38px 24px;border-radius:20px;}
    .cta h2{font-size:23px;}
    .cta-inner{flex-direction:column;align-items:flex-start;}
    .footer-grid{grid-template-columns:1fr;}
    .footer-bottom{flex-direction:column;}
    .header-actions .btn{padding:0 14px;font-size:14px;height:40px;}
    .brand-text{font-size:15px;}
  }