/* roulang page: index */
body{font-family:"Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.7;color:#1f2937;background:#f7f9fc}
  header,footer{background:#0f172a;color:#fff} header a,footer a{color:inherit;text-decoration:none}
  main section{padding:64px 0} .container{max-width:1180px}
  .hero,.site-hero{background:linear-gradient(135deg,#0f172a,#1d4ed8);color:#fff}
  .card,.feature-card,.service-card,.category-card{border:1px solid rgba(15,23,42,.08);box-shadow:0 12px 32px rgba(15,23,42,.08);border-radius:16px}
  .btn,.button,a[class*="btn"]{border-radius:999px;font-weight:700}
  img{max-width:100%;height:auto} @media(max-width:768px){main section{padding:42px 0} h1{font-size:2rem}}

/* roulang page: category2 */
/* roulang page: category2 */
:root{
  --ink:#1f2937;--ink-strong:#0f172a;--ink-soft:#5b6779;--line:rgba(15,23,42,.10);
  --bg:#f7f9fc;--surface:#ffffff;--surface-2:#eef3fb;
  --brand:#1d4ed8;--brand-deep:#0f172a;--brand-soft:#e6edff;--accent:#c2410c;--accent-soft:#fdece2;
  --radius-s:10px;--radius:16px;--radius-l:26px;
  --shadow:0 12px 32px rgba(15,23,42,.08);--shadow-lg:0 22px 54px rgba(15,23,42,.16);
  --sp-1:8px;--sp-2:14px;--sp-3:22px;--sp-4:34px;--sp-5:52px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.7;color:var(--ink);background:var(--bg)}
h1,h2,h3,h4{margin:0 0 .6em;line-height:1.28;color:var(--ink-strong);font-weight:800}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(29,78,216,.45);outline-offset:3px;border-radius:6px}
header,footer{background:#0f172a;color:#fff}
header a,footer a{color:inherit;text-decoration:none}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
main section{padding:42px 0}
main section:nth-child(even){background:var(--surface)}

/* nav */
.site-head{position:sticky;top:0;z-index:60;box-shadow:0 6px 24px rgba(15,23,42,.28)}
.head-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:74px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.06rem;letter-spacing:.4px}
.brand-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(140deg,#1d4ed8,#60a5fa);display:flex;align-items:center;justify-content:center;font-size:.9rem;font-weight:800;box-shadow:0 8px 18px rgba(29,78,216,.4)}
.brand-mark span{color:#fff}
.nav{display:flex;align-items:center;gap:6px}
.nav a{padding:9px 16px;border-radius:999px;font-size:.95rem;font-weight:600;color:rgba(255,255,255,.82);transition:background .2s ease,color .2s ease,transform .2s ease}
.nav a:hover{background:rgba(255,255,255,.12);color:#fff;transform:translateY(-1px)}
.nav a:active{transform:translateY(0)}
.nav a.active{background:#fff;color:#0f172a}
.nav-toggle{display:none;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);color:#fff;border-radius:12px;padding:9px 13px;font-size:1rem;cursor:pointer}

/* hero */
.cat-hero{position:relative;padding:0;background:#0f172a;color:#fff;overflow:hidden}
.cat-hero::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;opacity:.42}
.cat-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(115deg,rgba(15,23,42,.94) 8%,rgba(15,23,42,.72) 52%,rgba(29,78,216,.55) 100%)}
.cat-hero .container{position:relative;z-index:2;padding-top:74px;padding-bottom:74px}
.crumb{font-size:.86rem;color:rgba(255,255,255,.7);margin-bottom:18px}
.crumb a{color:rgba(255,255,255,.88)}
.crumb a:hover{color:#fff}
.eyebrow{display:inline-block;padding:6px 15px;border-radius:999px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);font-size:.82rem;letter-spacing:1.6px;margin-bottom:16px}
.cat-hero h1{color:#fff;font-size:2.5rem;max-width:16em}
.cat-hero .lead{max-width:44em;color:rgba(255,255,255,.9);font-size:1.04rem}
.hero-facts{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.fact{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:14px;padding:14px 20px;min-width:150px}
.fact b{display:block;font-size:1.5rem;color:#fff}
.fact span{font-size:.84rem;color:rgba(255,255,255,.75)}

/* headings */
.sec-head{max-width:52em;margin-bottom:var(--sp-4)}
.sec-head .tag{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:2px;color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:5px 14px;margin-bottom:14px}
.sec-head h2{font-size:1.86rem}
.sec-head p{color:var(--ink-soft);margin-bottom:0}

/* grids & cards */
.grid{display:grid;gap:var(--sp-3)}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
.card,.feature-card,.service-card,.category-card{background:var(--surface);border:1px solid rgba(15,23,42,.08);box-shadow:0 12px 32px rgba(15,23,42,.08);border-radius:16px}
.feature-card{padding:26px 24px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:rgba(29,78,216,.28)}
.feature-card h3{font-size:1.14rem}
.feature-card p{color:var(--ink-soft);margin-bottom:0;font-size:.96rem}
.f-ico{width:44px;height:44px;border-radius:13px;background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:16px}
.media-card{overflow:hidden;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .25s ease,box-shadow .25s ease}
.media-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.media-thumb{position:relative;aspect-ratio:16/10;overflow:hidden}
.media-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.media-card:hover .media-thumb img{transform:scale(1.06)}
.media-thumb::after{content:"";position:absolute;inset:auto 0 0 0;height:56%;background:linear-gradient(to top,rgba(15,23,42,.72),transparent)}
.thumb-tag{position:absolute;z-index:2;left:14px;bottom:12px;color:#fff;font-size:.84rem;font-weight:700;letter-spacing:.6px}
.media-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:8px;flex:1}
.media-body h3{font-size:1.1rem;margin-bottom:2px}
.media-body p{color:var(--ink-soft);font-size:.95rem;margin-bottom:0}
.meta{font-size:.82rem;color:#8a93a3}

/* tags */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:var(--sp-3)}
.chip{display:inline-block;padding:7px 15px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line);font-size:.86rem;color:#33415a;font-weight:600}
.chip.warm{background:var(--accent-soft);border-color:rgba(194,65,12,.18);color:#9a3412}

/* channel matrix */
.chan{display:grid;gap:var(--sp-3);grid-template-columns:repeat(3,1fr)}
.chan-item{position:relative;display:block;overflow:hidden;border-radius:var(--radius-l);min-height:230px;color:#fff;box-shadow:var(--shadow);border:1px solid rgba(15,23,42,.1)}
.chan-item img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.chan-item::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(15,23,42,.92),rgba(15,23,42,.28) 62%,rgba(15,23,42,.1))}
.chan-item:hover img{transform:scale(1.07)}
.chan-body{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:flex-end;padding:24px}
.chan-body h3{color:#fff;font-size:1.22rem;margin-bottom:6px}
.chan-body p{color:rgba(255,255,255,.84);font-size:.92rem;margin-bottom:10px}
.chan-body em{font-style:normal;font-size:.84rem;font-weight:700;color:#bfdbfe}
.chan-item.current{outline:3px solid #1d4ed8;outline-offset:-3px}

/* split block */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:var(--sp-5);align-items:center}
.split-img{border-radius:var(--radius-l);overflow:hidden;box-shadow:var(--shadow-lg)}
.checks li{position:relative;padding-left:30px;margin-bottom:14px;color:#33415a}
.checks li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:14px;border-radius:5px;background:var(--brand);box-shadow:0 0 0 4px var(--brand-soft)}
.checks li b{color:var(--ink-strong)}

/* timeline */
.tl{position:relative;padding-left:26px}
.tl::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;background:linear-gradient(to bottom,var(--brand),rgba(29,78,216,.12))}
.tl li{position:relative;padding:0 0 26px 18px}
.tl li::before{content:"";position:absolute;left:-26px;top:7px;width:14px;height:14px;border-radius:50%;background:#fff;border:3px solid var(--brand)}
.tl h3{font-size:1.06rem;margin-bottom:4px}
.tl p{color:var(--ink-soft);margin-bottom:0;font-size:.95rem}
.tl-year{font-size:.8rem;font-weight:700;color:var(--accent);letter-spacing:1px}

/* quotes */
.quote{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px 24px;display:flex;flex-direction:column;gap:14px}
.quote p{font-size:.98rem;color:#33415a;margin:0}
.q-who{display:flex;align-items:center;gap:12px;font-size:.88rem;color:var(--ink-soft)}
.q-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(140deg,#1d4ed8,#93c5fd);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}

/* faq */
.faq{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);overflow:hidden}
.faq details{border-bottom:1px solid var(--line)}
.faq details:last-child{border-bottom:0}
.faq summary{cursor:pointer;list-style:none;padding:20px 56px 20px 24px;font-weight:700;color:var(--ink-strong);position:relative;transition:background .2s ease}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:24px;top:50%;transform:translateY(-50%);font-size:1.3rem;color:var(--brand);font-weight:700}
.faq details[open] summary::after{content:"–"}
.faq summary:hover{background:var(--surface-2)}
.faq .ans{padding:0 24px 22px;color:var(--ink-soft);font-size:.96rem}

/* cta */
.cta{background:linear-gradient(135deg,#0f172a,#1d4ed8);color:#fff;border-radius:var(--radius-l);padding:44px 40px;box-shadow:var(--shadow-lg);display:grid;grid-template-columns:1.1fr .9fr;gap:var(--sp-4);align-items:center}
.cta h2{color:#fff;font-size:1.7rem}
.cta p{color:rgba(255,255,255,.86);margin-bottom:0}
.form-card{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:var(--radius);padding:22px}
.field{margin-bottom:14px}
.field label{display:block;font-size:.85rem;color:rgba(255,255,255,.82);margin-bottom:6px;font-weight:600}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border-radius:12px;border:1px solid rgba(255,255,255,.28);background:rgba(15,23,42,.34);color:#fff;font-family:inherit;font-size:.95rem}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.55)}
.form-note{font-size:.8rem;color:rgba(255,255,255,.68);margin:10px 0 0}
.btn,.button,a[class*="btn"]{border-radius:999px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;font-size:.97rem;border:1px solid transparent;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 12px 26px rgba(29,78,216,.34)}
.btn-primary:hover{background:#1740b8;color:#fff;transform:translateY(-2px)}
.btn-light{background:#fff;color:#0f172a}
.btn-light:hover{background:#e8eefb;color:#0f172a;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff}
.btn-block{width:100%}
.btn:active{transform:translateY(0)}

/* footer */
.site-foot{margin-top:0}
.foot-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:var(--sp-4);padding:52px 0 34px}
.foot-top h4{color:#fff;font-size:1rem;letter-spacing:.6px;margin-bottom:16px}
.foot-top p{color:rgba(255,255,255,.66);font-size:.92rem}
.foot-links li{margin-bottom:10px}
.foot-links a{color:rgba(255,255,255,.72);font-size:.93rem}
.foot-links a:hover{color:#fff}
.foot-bar{border-top:1px solid rgba(255,255,255,.14);padding:18px 0;font-size:.86rem;color:rgba(255,255,255,.6);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between}

@media(max-width:1024px){
  .g-4{grid-template-columns:repeat(2,1fr)}
  .chan{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:var(--sp-4)}
  .foot-top{grid-template-columns:1fr 1fr}
  .cat-hero h1{font-size:2.15rem}
}
@media(max-width:768px){
  main section{padding:42px 0}
  h1{font-size:2rem}
  .nav{position:absolute;left:0;right:0;top:74px;flex-direction:column;align-items:stretch;gap:4px;background:#0f172a;padding:12px 20px 20px;display:none;box-shadow:0 18px 30px rgba(15,23,42,.32)}
  .nav.open{display:flex}
  .nav a{padding:12px 14px;border-radius:12px}
  .nav-toggle{display:inline-block}
  .g-2,.g-3,.g-4{grid-template-columns:1fr}
  .cta{grid-template-columns:1fr;padding:32px 24px}
  .sec-head h2{font-size:1.56rem}
}
@media(max-width:520px){
  .container{padding:0 16px}
  .cat-hero .container{padding-top:52px;padding-bottom:52px}
  .cat-hero h1{font-size:1.72rem}
  .chan{grid-template-columns:1fr}
  .fact{min-width:0;flex:1 1 44%}
  .foot-top{grid-template-columns:1fr}
  .media-body{padding:18px}
}