/* roulang page: index */
:root{
  --primary:#12546B;
  --primary-deep:#0B3B4D;
  --primary-mid:#2E7C93;
  --primary-tint:#E9F1F3;
  --accent:#D9713C;
  --accent-hover:#B85A2B;
  --accent-tint:#FBEEE7;
  --bg:#FFFFFF;
  --bg-alt:#F6F8F8;
  --dark:#0B3B4D;
  --text:#1F2A2E;
  --text-2:#5A6A70;
  --text-3:#8A979C;
  --line:#E2E8E9;
  --line-2:#EDF1F2;
  --input:#DCE4E6;
  --ok:#2E7D62;
  --warn:#C9A227;
  --err:#C0432C;
  --r-card:10px;
  --r-btn:8px;
  --r-badge:4px;
  --sh-card:0 1px 2px rgba(11,59,77,.05), 0 8px 24px rgba(11,59,77,.06);
  --sh-card-hover:0 2px 4px rgba(11,59,77,.06), 0 16px 36px rgba(11,59,77,.10);
  --t:200ms cubic-bezier(.2,.6,.2,1);
  --t-card:240ms cubic-bezier(.2,.6,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--primary-deep)}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.num{font-variant-numeric:tabular-nums}
.grid-container{max-width:1200px;padding-left:32px;padding-right:32px;margin:0 auto}
.section{padding:96px 0}
.section--alt{background:var(--bg-alt)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head .eyebrow{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.18em;color:var(--primary-mid);margin-bottom:14px}
.section-head .eyebrow::before{content:"";width:14px;height:2px;background:var(--accent);display:block}
.section-head h2{font-size:32px;line-height:1.3;font-weight:700;color:var(--primary-deep)}
.section-head p{margin-top:14px;font-size:15.5px;color:var(--text-2);max-width:640px}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;margin-bottom:40px}
.link-arrow{font-size:15px;font-weight:500;color:var(--primary);display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.link-arrow span{transition:transform 160ms cubic-bezier(.2,.6,.2,1)}
.link-arrow:hover span{transform:translateX(3px)}

/* header */
.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--line-2)}
.nav-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;color:var(--primary-deep);letter-spacing:.01em;line-height:1}
.logo::before{content:"";width:3px;height:20px;background:var(--accent);border-radius:2px;display:block}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{position:relative;display:block;line-height:72px;font-size:15px;font-weight:500;color:var(--text-2)}
.nav-links a::after{content:"";position:absolute;left:50%;bottom:22px;width:0;height:1.5px;background:rgba(18,84,107,.4);transform:translateX(-50%);transition:width var(--t)}
.nav-links a:hover{color:var(--primary)}
.nav-links a:hover::after{width:16px}
.nav-links a.active{color:var(--primary-deep);font-weight:600}
.nav-links a.active::after{width:16px;height:2px;background:var(--primary)}
.nav-side{display:flex;align-items:center;gap:18px}
.nav-side .contact-link{font-size:15px;font-weight:500;color:var(--primary)}
.nav-toggle{display:none;width:40px;height:40px;border:0;background:transparent;padding:0;flex-direction:column;justify-content:center;gap:5px;cursor:pointer}
.nav-toggle span{display:block;width:22px;height:1.5px;background:var(--primary-deep);margin:0 auto;transition:var(--t)}
.nav-mask{position:fixed;inset:0;background:rgba(11,59,77,.35);opacity:0;visibility:hidden;transition:opacity var(--t);z-index:70}
.nav-mask.open{opacity:1;visibility:visible}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:500;line-height:1;padding:13px 26px;border-radius:var(--r-btn);border:1.5px solid transparent;cursor:pointer;transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-deep);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(11,59,77,.18)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-ghost{background:transparent;color:var(--primary);border-color:rgba(18,84,107,.32)}
.btn-ghost:hover{background:var(--primary-tint);border-color:var(--primary);color:var(--primary-deep)}
.btn-light{background:#fff;color:var(--primary);border-color:#fff}
.btn-light:hover{background:var(--primary-tint);color:var(--primary-deep)}
.btn-line-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.62)}
.btn-line-light:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px)}

/* hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line-2)}
.hero-bg{position:absolute;inset:0;background:url("/assets/images/backpic/back-1.webp") center/cover no-repeat;opacity:1}
.hero-bg::after{content:"";position:absolute;inset:0;background:rgba(255,255,255,.86)}
.hero-inner{position:relative;min-height:520px;display:flex;align-items:center;padding:72px 0}
.hero-copy{max-width:560px}
.hero-mark{width:2px;height:24px;background:var(--accent);margin-bottom:22px}
.hero h1{font-size:44px;line-height:1.24;font-weight:700;color:var(--primary-deep);letter-spacing:-.01em}
.hero .hero-sub{margin-top:20px;font-size:16.5px;line-height:1.85;color:var(--text-2);max-width:520px}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:12px}
.trust-line{margin-top:48px;display:flex;flex-wrap:wrap;align-items:center;gap:0}
.trust-line .trust-item{padding:0 24px;border-left:1px solid var(--line)}
.trust-line .trust-item:first-child{padding-left:0;border-left:0}
.trust-line .trust-item strong{display:block;font-size:15px;font-weight:600;color:var(--primary);font-variant-numeric:tabular-nums}
.trust-line .trust-item span{display:block;font-size:13px;color:var(--text-2);margin-top:2px}
.hero-figure{border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card)}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}

/* service rows */
.row-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:56px}
.row-item{display:flex;align-items:center;gap:20px;height:88px;border-top:1px solid var(--line-2);padding:0 12px;transition:background var(--t)}
.row-list .row-item:nth-last-child(-n+2){border-bottom:1px solid var(--line-2)}
.row-item:hover{background:var(--bg-alt)}
.row-item .idx{font-size:15px;font-weight:600;color:rgba(18,84,107,.42);font-variant-numeric:tabular-nums;min-width:26px}
.row-item .body{flex:1;min-width:0}
.row-item .body h3{font-size:20px;font-weight:600;color:var(--primary-deep);line-height:1.4}
.row-item .body p{font-size:14.5px;color:var(--text-2);margin-top:2px;line-height:1.7;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.row-item .go{font-size:16px;color:var(--primary-mid);transition:transform 160ms cubic-bezier(.2,.6,.2,1)}
.row-item:hover .go{transform:translateX(4px)}

/* stats */
.stats{border-top:1px solid rgba(18,84,107,.2);padding-top:36px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.stat{padding:0 32px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0;padding-left:0}
.stat b{display:block;font-size:40px;line-height:1.1;font-weight:700;color:var(--primary);font-variant-numeric:tabular-nums}
.stat b em{font-style:normal;font-size:18px;font-weight:600;margin-left:4px;color:var(--primary-mid)}
.stat span{display:block;margin-top:10px;font-size:14px;color:var(--text-2)}

/* cases */
.case-row{display:flex;align-items:center;gap:48px;margin-top:64px}
.case-row:first-of-type{margin-top:0}
.case-row .case-media{flex:0 0 58%;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card)}
.case-row .case-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform var(--t-card)}
.case-row .case-media:hover img{transform:scale(1.03)}
.case-row .case-text{flex:1;min-width:0}
.case-row .case-text h3{font-size:22px;font-weight:600;color:var(--primary-deep);line-height:1.4}
.case-row .case-text p{margin-top:14px;font-size:15.5px;line-height:1.85;color:var(--text-2)}
.case-row .case-text .link-arrow{margin-top:20px}
.case-row.rev{flex-direction:row-reverse}

/* plans */
.plan-wrap{display:flex;gap:56px;align-items:flex-start}
.plan-aside{flex:0 0 32%;position:sticky;top:112px}
.plan-aside h2{font-size:32px;line-height:1.3;color:var(--primary-deep)}
.plan-aside p{margin-top:14px;font-size:15.5px;color:var(--text-2)}
.plan-aside .btn{margin-top:26px}
.plan-cols{flex:1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
.plan-col{padding-top:0}
.plan-col.offset{padding-top:32px}
.plan-card{background:#fff;border-radius:var(--r-card);box-shadow:var(--sh-card);padding:28px;position:relative;overflow:hidden;transition:box-shadow var(--t-card),transform var(--t-card);margin-bottom:28px}
.plan-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent);transform:scaleY(0);transform-origin:top;transition:transform 120ms cubic-bezier(.2,.6,.2,1)}
.plan-card:hover{box-shadow:var(--sh-card-hover);transform:translateY(-2px)}
.plan-card:hover::before{transform:scaleY(1)}
.plan-card h3{font-size:18px;font-weight:600;color:var(--primary-deep)}
.plan-card p{margin-top:12px;font-size:14.5px;line-height:1.75;color:var(--text-2)}
.plan-card .plan-tags{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px}
.tag{display:inline-block;font-size:12px;line-height:1.6;padding:2px 8px;border-radius:var(--r-badge);background:var(--primary-tint);color:var(--primary)}
.tag--accent{background:var(--accent-tint);color:var(--accent-hover)}

/* news cards */
.news-card{display:flex;flex-direction:column;background:#fff;border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;height:100%;transition:box-shadow var(--t-card),transform var(--t-card);position:relative}
.news-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent);transform:scaleY(0);transform-origin:top;transition:transform 120ms cubic-bezier(.2,.6,.2,1);z-index:2}
.news-card:hover{box-shadow:var(--sh-card-hover);transform:translateY(-2px)}
.news-card:hover::before{transform:scaleY(1)}
.news-media{overflow:hidden}
.news-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform var(--t-card)}
.news-card:hover .news-media img{transform:scale(1.03)}
.news-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.news-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums}
.news-title{margin-top:12px;font-size:18px;font-weight:600;line-height:1.45;color:var(--primary-deep);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-desc{margin-top:10px;font-size:14.5px;line-height:1.75;color:var(--text-2);flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{margin-top:16px}
.empty-state{border:1px dashed var(--line);border-radius:var(--r-card);padding:56px 24px;text-align:center;color:var(--text-2);font-size:15px}
.empty-state a{display:inline-flex;margin-top:10px;font-weight:500}

/* faq */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line-2)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 0;font-size:17px;font-weight:600;color:var(--primary-deep)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{position:relative;width:24px;height:24px;flex:none;border:1.5px solid var(--line);border-radius:50%;transition:border-color var(--t)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--primary-mid);transform:translate(-50%,-50%);transition:transform var(--t),background var(--t),opacity var(--t)}
.faq-icon::before{width:10px;height:1.5px}
.faq-icon::after{width:1.5px;height:10px}
.faq-item[open] .faq-icon{border-color:var(--accent)}
.faq-item[open] .faq-icon::before{background:var(--accent);transform:translate(-50%,-50%) rotate(45deg)}
.faq-item[open] .faq-icon::after{background:var(--accent);opacity:0;transform:translate(-50%,-50%) rotate(45deg)}
.faq-answer{padding:0 44px 22px 0;font-size:15.5px;line-height:1.8;color:var(--text-2)}

/* contact */
.contact-grid{display:flex;gap:56px;align-items:flex-start}
.contact-form{flex:1;background:#fff;border-radius:var(--r-card);box-shadow:var(--sh-card);padding:32px}
.field{margin-bottom:20px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--text);margin-bottom:8px}
.field label em{font-style:normal;color:var(--accent);margin-left:4px}
.field input,.field select,.field textarea{width:100%;height:46px;padding:0 14px;border:1px solid var(--input);border-radius:var(--r-btn);background:#fff;transition:border-color var(--t),box-shadow var(--t)}
.field textarea{height:auto;min-height:120px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(18,84,107,.12)}
.form-note{margin-top:14px;font-size:13px;color:var(--text-3)}
.form-ok{display:none;margin-bottom:20px;padding:12px 16px;border-radius:var(--r-btn);background:rgba(46,125,98,.12);color:var(--ok);font-size:14px}
.form-ok.show{display:block}
.contact-side{flex:0 0 40%}
.contact-side .side-title{font-size:18px;font-weight:600;color:var(--primary-deep);margin-bottom:20px}
.contact-item{display:flex;gap:14px;padding:18px 0;border-bottom:1px solid var(--line-2)}
.contact-item:first-of-type{padding-top:0}
.contact-item .ico{flex:none;width:18px;height:18px;margin-top:4px;stroke:var(--primary);fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.contact-item .txt strong{display:block;font-size:14px;font-weight:600;color:var(--text)}
.contact-item .txt span{display:block;font-size:14px;color:var(--text-2);margin-top:4px;line-height:1.7}

/* cta band */
.cta-band{background:var(--dark);padding:72px 0}
.cta-band h2{color:rgba(255,255,255,.94);font-size:28px;line-height:1.35}
.cta-band p{color:rgba(255,255,255,.72);font-size:15.5px;margin-top:14px;max-width:620px}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}

/* footer */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .logo{color:#fff}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:300px}
.footer-social{display:flex;gap:12px;margin-top:20px}
.footer-social a{width:32px;height:32px;border:1px solid rgba(255,255,255,.24);border-radius:50%;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.72);font-size:12px}
.footer-social a:hover{color:#fff;border-color:rgba(255,255,255,.6)}
.footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.92);margin-bottom:20px;letter-spacing:.02em}
.footer-col li{margin-bottom:12px}
.footer-col a,.footer-col span{font-size:14px;color:rgba(255,255,255,.72);line-height:1.7}
.footer-col a:hover{color:#fff;text-decoration:underline}
.footer-bottom{margin-top:56px;border-top:1px solid rgba(255,255,255,.14);padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.56)}

/* responsive */
@media (max-width:1199px){
  .row-list{column-gap:40px}
}
@media (max-width:1023px){
  .grid-container{padding-left:24px;padding-right:24px}
  .section{padding:72px 0}
  .nav-links{position:fixed;top:0;right:-300px;width:280px;height:100vh;background:#fff;flex-direction:column;align-items:stretch;gap:0;padding-top:72px;box-shadow:-8px 0 32px rgba(11,59,77,.12);transition:right var(--t);z-index:75;overflow-y:auto}
  .nav-links.open{right:0}
  .nav-links a{line-height:52px;padding:0 24px;border-bottom:1px solid var(--line-2);border-left:3px solid transparent;font-size:15px}
  .nav-links a::after{display:none}
  .nav-links a.active{color:var(--primary-deep);border-left-color:var(--accent);background:var(--bg-alt)}
  .nav-side .contact-link{display:none}
  .nav-toggle{display:flex}
  .hero h1{font-size:34px}
  .hero-inner{min-height:auto;padding:56px 0}
  .hero-figure{margin-top:40px}
  .row-list{grid-template-columns:minmax(0,1fr)}
  .row-list .row-item:nth-last-child(-n+2){border-bottom:0}
  .row-list .row-item:last-child{border-bottom:1px solid var(--line-2)}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 0}
  .stat:nth-child(odd){border-left:0;padding-left:0}
  .case-row,.case-row.rev{flex-direction:column;gap:24px;margin-top:48px}
  .case-row .case-media,.case-row .case-text{flex:1 1 auto;width:100%}
  .plan-wrap{flex-direction:column;gap:36px}
  .plan-aside{position:static;flex:1 1 auto;width:100%}
  .contact-grid{flex-direction:column;gap:36px}
  .contact-side{flex:1 1 auto;width:100%}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:639px){
  body{font-size:15.5px}
  .grid-container{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .section-head h2,.plan-aside h2{font-size:24px}
  .hero h1{font-size:32px}
  .hero .hero-sub{font-size:15.5px}
  .hero-actions .btn{width:100%}
  .trust-line{gap:20px 0;margin-top:36px}
  .trust-line .trust-item{width:50%;padding:0 16px;border-left:0}
  .trust-line .trust-item:first-child{padding-left:0}
  .row-item{height:auto;padding:18px 8px;align-items:flex-start}
  .row-item .body h3{font-size:18px}
  .row-item .body p{white-space:normal}
  .row-item .go{margin-top:6px}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat{padding:0 16px}
  .stat b{font-size:32px}
  .plan-cols{grid-template-columns:minmax(0,1fr)}
  .plan-col.offset{padding-top:0}
  .plan-card{padding:20px;margin-bottom:20px}
  .news-body{padding:20px}
  .faq-answer{padding-right:0}
  .contact-form{padding:22px}
  .cta-band{padding:56px 0}
  .cta-inner .btn{width:100%}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: article */
:root{
  --primary:#12546B;
  --primary-deep:#0B3B4D;
  --primary-mid:#2E7C93;
  --primary-tint:#E9F1F3;
  --accent:#D9713C;
  --accent-hover:#B85A2B;
  --accent-tint:#FBEEE7;
  --page-bg:#FFFFFF;
  --bg-alt:#F6F8F8;
  --text:#1F2A2E;
  --text-sub:#5A6A70;
  --text-weak:#8A979C;
  --line:#E2E8E9;
  --line-soft:#EDF1F2;
  --input-line:#DCE4E6;
  --ok:#2E7D62;
  --err:#C0432C;
  --radius-card:10px;
  --radius-btn:8px;
  --radius-badge:4px;
  --shadow-card:0 1px 2px rgba(11,59,77,.05),0 8px 24px rgba(11,59,77,.06);
  --shadow-card-hover:0 2px 4px rgba(11,59,77,.06),0 16px 36px rgba(11,59,77,.10);
  --font:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --ease:cubic-bezier(.2,.6,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--page-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);}
a:hover{color:var(--primary-deep);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--primary-deep);}
h1{font-size:44px;line-height:1.24;}
h2{font-size:32px;line-height:1.3;}
h3{font-size:22px;line-height:1.4;font-weight:600;}
h4{font-size:18px;line-height:1.45;font-weight:600;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
.num{font-variant-numeric:tabular-nums;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

/* 容器 */
.grid-container{max-width:1200px;margin:0 auto;padding-left:32px;padding-right:32px;width:100%;}
.section{padding:96px 0;}
.section-alt{background:var(--bg-alt);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.18em;color:var(--primary-mid);text-transform:none;margin-bottom:14px;}
.section-head .eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);}
.section-head p{margin-top:14px;font-size:15.5px;color:var(--text-sub);line-height:1.8;}

/* 导航 */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line-soft);transition:box-shadow .2s var(--ease);}
.site-header.is-stuck{box-shadow:0 1px 0 var(--line);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--primary-deep);letter-spacing:.01em;}
.logo::before{content:"";width:3px;height:20px;border-radius:2px;background:var(--accent);}
.logo:hover{color:var(--primary-deep);}
.nav-links{display:flex;align-items:center;gap:32px;}
.nav-links a{position:relative;display:inline-block;padding:6px 0;font-size:15px;font-weight:500;color:var(--text-sub);}
.nav-links a::after{content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;border-radius:2px;background:var(--primary);transform:translateX(-50%);transition:width .2s var(--ease);}
.nav-links a:hover{color:var(--primary);}
.nav-links a:hover::after{width:16px;background:rgba(18,84,107,.4);}
.nav-links a.active{color:var(--primary-deep);font-weight:600;}
.nav-links a.active::after{width:16px;background:var(--primary);}
.nav-side{display:flex;align-items:center;gap:18px;}
.contact-link{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:500;color:var(--primary);}
.contact-link::after{content:"\2192";font-size:14px;transition:transform .16s var(--ease);}
.contact-link:hover::after{transform:translateX(3px);}
.nav-toggle{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px;}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--primary-deep);transition:transform .2s var(--ease),opacity .2s var(--ease);}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}
.nav-mask{position:fixed;inset:0;background:rgba(11,59,77,.35);opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);z-index:55;}
.nav-mask.is-open{opacity:1;visibility:visible;}

/* 面包屑 */
.crumb-bar{padding-top:24px;padding-bottom:16px;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-sub);}
.crumb a{color:var(--text-sub);}
.crumb a:hover{color:var(--primary);}
.crumb .sep{color:var(--text-weak);}
.crumb .now{color:var(--primary-deep);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* 文章头 */
.article-hero{background:var(--bg-alt);border-bottom:1px solid var(--line-soft);}
.article-hero-inner{max-width:880px;padding-top:8px;padding-bottom:52px;}
.tag-badge{display:inline-block;padding:4px 10px;border-radius:var(--radius-badge);background:var(--primary-tint);color:var(--primary);font-size:12px;font-weight:600;letter-spacing:.02em;}
.article-hero h1{font-size:40px;line-height:1.28;margin-top:18px;}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:22px;font-size:13.5px;color:var(--text-sub);}
.meta-row .dot{width:1px;height:12px;background:var(--line);}
.meta-row i{color:var(--primary-mid);font-size:13px;}

/* 文章主体 */
.article-wrap{padding:56px 0 80px;}
.cover-figure{max-width:960px;margin:0 auto 48px;}
.cover-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-card);}
.cover-figure figcaption{margin-top:12px;text-align:center;font-size:13px;color:var(--text-weak);}
.article-body{max-width:760px;margin:0 auto;font-size:16.5px;line-height:1.85;color:var(--text);}
.article-body>h2{position:relative;font-size:26px;line-height:1.35;margin:44px 0 16px;padding-left:16px;}
.article-body>h2::before{content:"";position:absolute;left:0;top:.34em;width:3px;height:22px;border-radius:2px;background:var(--accent);}
.article-body>h3{font-size:20px;line-height:1.45;margin:32px 0 12px;color:var(--primary);}
.article-body>h4{font-size:17px;margin:24px 0 10px;color:var(--primary-deep);}
.article-body p{margin:0 0 22px;}
.article-body img{border-radius:var(--radius-card);margin:28px auto;width:100%;}
.article-body ul{margin:0 0 22px;}
.article-body ul>li{position:relative;padding-left:20px;margin-bottom:10px;}
.article-body ul>li::before{content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;border-radius:1px;background:var(--accent);}
.article-body ol{margin:0 0 22px;padding-left:0;list-style:none;counter-reset:cms-li;}
.article-body ol>li{position:relative;padding-left:30px;margin-bottom:12px;counter-increment:cms-li;}
.article-body ol>li::before{content:counter(cms-li);position:absolute;left:0;top:.18em;width:20px;height:20px;border-radius:50%;background:var(--primary-tint);color:var(--primary);font-size:12px;font-weight:600;line-height:20px;text-align:center;}
.article-body blockquote{margin:28px 0;padding:20px 24px;border-left:3px solid var(--primary);background:var(--bg-alt);border-radius:0 var(--radius-card) var(--radius-card) 0;color:var(--text-sub);font-size:16px;}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body table{width:100%;border-collapse:collapse;margin:28px 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;}
.article-body th{background:var(--bg-alt);font-weight:600;color:var(--primary-deep);}
.article-body strong{font-weight:600;color:var(--primary-deep);}
.article-body hr{border:0;border-top:1px solid var(--line-soft);margin:40px 0;}

/* 标签行 */
.tag-row{max-width:760px;margin:44px auto 0;padding-top:24px;border-top:1px solid var(--line-soft);display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.tag-row .label{font-size:13px;color:var(--text-weak);}
.tag-chip{display:inline-block;padding:5px 12px;border-radius:var(--radius-badge);border:1px solid var(--line);background:#fff;font-size:12.5px;color:var(--text-sub);transition:all .2s var(--ease);}
.tag-chip:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-tint);}

/* 空态 */
.empty-state{max-width:760px;margin:0 auto;padding:56px 24px;border:1px dashed var(--line);border-radius:var(--radius-card);text-align:center;color:var(--text-sub);font-size:15px;}
.empty-state p{margin-bottom:14px;}
.empty-state a{font-weight:600;display:inline-flex;align-items:center;gap:6px;}

/* 延伸阅读卡 */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.rel-card{display:flex;flex-direction:column;height:100%;background:#fff;border-radius:var(--radius-card);box-shadow:var(--shadow-card);overflow:hidden;position:relative;transition:transform .24s var(--ease),box-shadow .24s var(--ease);}
.rel-card::before{content:"";position:absolute;left:0;top:0;width:3px;height:0;background:var(--accent);transition:height .12s var(--ease);z-index:2;}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-card-hover);color:inherit;}
.rel-card:hover::before{height:56px;}
.rel-thumb{overflow:hidden;}
.rel-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .24s var(--ease);}
.rel-card:hover .rel-thumb img{transform:scale(1.03);}
.rel-body{padding:24px 26px 26px;display:flex;flex-direction:column;flex-grow:1;}
.rel-body h3{font-size:18px;color:var(--primary-deep);margin-bottom:10px;line-height:1.45;}
.rel-body p{font-size:14.5px;color:var(--text-sub);line-height:1.75;margin-bottom:16px;flex-grow:1;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--primary);}
.link-arrow::after{content:"\2192";font-size:14px;transition:transform .16s var(--ease);}
.rel-card:hover .link-arrow::after{transform:translateX(3px);}

/* 返回 */
.back-row{max-width:760px;margin:48px auto 0;}
.back-link{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--primary);}
.back-link::before{content:"\2190";font-size:14px;transition:transform .16s var(--ease);}
.back-link:hover::before{transform:translateX(-3px);}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:600;line-height:1;padding:13px 26px;border-radius:var(--radius-btn);border:1px solid transparent;cursor:pointer;transition:background-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 1px 2px rgba(11,59,77,.08);}
.btn-primary:hover{background:var(--primary-deep);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(11,59,77,.18);}
.btn-primary:active{transform:none;box-shadow:0 1px 2px rgba(11,59,77,.08);}
.btn-ghost{background:transparent;border-color:rgba(18,84,107,.32);color:var(--primary);}
.btn-ghost:hover{background:var(--primary-tint);border-color:var(--primary);color:var(--primary-deep);}
.btn-light{background:#fff;color:var(--primary);}
.btn-light:hover{background:#fff;color:var(--primary-deep);transform:translateY(-1px);box-shadow:0 10px 24px rgba(0,0,0,.18);}

/* 底部 CTA */
.cta-band{background:var(--primary-deep);color:rgba(255,255,255,.92);padding:64px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;}
.cta-inner h2{color:#fff;font-size:28px;line-height:1.35;}
.cta-inner p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.72);max-width:560px;}

/* 页脚 */
.site-footer{background:var(--primary-deep);color:rgba(255,255,255,.72);padding:72px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.site-footer .logo{color:#fff;font-size:19px;margin-bottom:16px;}
.site-footer .logo:hover{color:#fff;}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:320px;}
.footer-social{display:flex;gap:14px;margin-top:20px;}
.footer-social a{font-size:13.5px;color:rgba(255,255,255,.72);padding:6px 12px;border:1px solid rgba(255,255,255,.2);border-radius:var(--radius-badge);}
.footer-social a:hover{color:#fff;border-color:rgba(255,255,255,.5);}
.footer-col h4{color:rgba(255,255,255,.92);font-size:14px;font-weight:600;margin-bottom:18px;}
.footer-col ul li{margin-bottom:12px;font-size:14px;}
.footer-col ul li a{color:rgba(255,255,255,.72);}
.footer-col ul li a:hover{color:#fff;text-decoration:underline;}
.footer-col ul li span{color:rgba(255,255,255,.72);}
.footer-bottom{margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,.14);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.56);}

@media screen and (max-width:1023px){
  h1{font-size:34px;}
  h2{font-size:26px;}
  .grid-container{padding-left:24px;padding-right:24px;}
  .section{padding:72px 0;}
  .nav-toggle{display:flex;}
  .nav-links{position:fixed;top:0;right:0;bottom:0;width:280px;background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:76px 0 24px;transform:translateX(100%);transition:transform .24s var(--ease);box-shadow:-12px 0 32px rgba(11,59,77,.12);z-index:58;overflow-y:auto;}
  .nav-links.is-open{transform:translateX(0);}
  .nav-links a{padding:0 24px;height:52px;line-height:52px;border-bottom:1px solid var(--line-soft);font-size:15px;}
  .nav-links a::after{display:none;}
  .nav-links a.active{color:var(--primary-deep);box-shadow:inset 3px 0 0 var(--accent);}
  .contact-link{display:none;}
  .article-hero h1{font-size:30px;}
  .article-hero-inner{padding-bottom:40px;}
  .article-body{font-size:16px;}
  .rel-grid{grid-template-columns:repeat(2,1fr);gap:20px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media screen and (max-width:639px){
  h1{font-size:32px;}
  h2{font-size:24px;}
  h3{font-size:19px;}
  .grid-container{padding-left:20px;padding-right:20px;}
  .section{padding:56px 0;}
  .nav-inner{height:60px;}
  .article-hero h1{font-size:25px;line-height:1.35;}
  .article-wrap{padding:40px 0 56px;}
  .article-body{font-size:15.5px;}
  .article-body>h2{font-size:21px;margin-top:36px;}
  .article-body>h3{font-size:18px;}
  .rel-grid{grid-template-columns:1fr;}
  .cta-inner h2{font-size:22px;}
  .cta-inner .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --primary:#12546B;
  --primary-deep:#0B3B4D;
  --primary-mid:#2E7C93;
  --primary-tint:#E9F1F3;
  --accent:#D9713C;
  --accent-hover:#B85A2B;
  --accent-tint:#FBEEE7;
  --bg:#FFFFFF;
  --bg-alt:#F6F8F8;
  --ink:#1F2A2E;
  --ink-2:#5A6A70;
  --ink-3:#8A979C;
  --line:#E2E8E9;
  --line-soft:#EDF1F2;
  --input-line:#DCE4E6;
  --ok:#2E7D62;
  --err:#C0432C;
  --r-card:10px;
  --r-btn:8px;
  --r-badge:4px;
  --sh-card:0 1px 2px rgba(11,59,77,.05),0 8px 24px rgba(11,59,77,.06);
  --sh-card-h:0 2px 4px rgba(11,59,77,.06),0 16px 36px rgba(11,59,77,.10);
  --ease:cubic-bezier(.2,.6,.2,1);
  --t:200ms cubic-bezier(.2,.6,.2,1);
}
/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary);text-decoration:none;transition:color var(--t),border-color var(--t),background-color var(--t);}
a:hover{color:var(--primary-deep);}
button{font-family:inherit;font-size:inherit;color:inherit;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
::selection{background:var(--accent-tint);color:var(--primary-deep);}

/* ============ 容器与栅格覆盖 ============ */
.grid-container{
  max-width:1200px;
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}
.grid-x{margin-left:-14px;margin-right:-14px;}
.grid-x > .cell{padding-left:14px;padding-right:14px;padding-bottom:28px;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line-soft);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:19px;
  font-weight:700;
  letter-spacing:.01em;
  color:var(--primary-deep);
  white-space:nowrap;
}
.logo::before{
  content:"";
  width:8px;
  height:8px;
  border-radius:2px;
  background:var(--primary);
  flex:0 0 auto;
}
.logo:hover{color:var(--primary-deep);}
.nav-links{display:flex;align-items:center;gap:32px;}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:0 2px;
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  line-height:72px;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:24px;
  width:0;
  height:1.5px;
  background:rgba(18,84,107,.4);
  transform:translateX(-50%);
  transition:width var(--t),background-color var(--t),height var(--t);
}
.nav-links a:hover{color:var(--primary);}
.nav-links a:hover::after{width:16px;}
.nav-links a.active{color:var(--primary-deep);font-weight:600;}
.nav-links a.active::after{width:16px;height:2px;background:var(--primary);}
.nav-side{display:flex;align-items:center;gap:20px;}
.contact-link{
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  padding:8px 16px;
  transition:border-color var(--t),color var(--t),background-color var(--t);
}
.contact-link:hover{color:var(--primary-deep);border-color:var(--primary);background:var(--primary-tint);}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:40px;
  height:40px;
  padding:0 8px;
  background:none;
  border:0;
  cursor:pointer;
}
.nav-toggle span{display:block;width:24px;height:1.5px;background:var(--primary-deep);transition:transform var(--t),opacity var(--t);}
.nav-mask{
  position:fixed;
  inset:0;
  background:rgba(11,59,77,.35);
  opacity:0;
  visibility:hidden;
  transition:opacity var(--t),visibility var(--t);
  z-index:70;
}
.nav-mask.open{opacity:1;visibility:visible;}

/* ============ 面包屑 ============ */
.crumb{
  padding-top:24px;
  padding-bottom:16px;
  font-size:13px;
  color:var(--ink-2);
}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li + li::before{content:"/";color:var(--ink-3);}
.crumb a{color:var(--ink-2);}
.crumb a:hover{color:var(--primary);}
.crumb .current{color:var(--primary-deep);font-weight:600;}

/* ============ 矮 Hero ============ */
.cat-hero{
  background:var(--bg-alt);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
  padding:56px 0 56px;
}
.hero-row{align-items:center;}
.hero-copy{min-height:208px;display:flex;flex-direction:column;justify-content:center;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  color:var(--primary-mid);
  margin-bottom:16px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;}
.cat-hero h1{
  font-size:44px;
  font-weight:700;
  line-height:1.24;
  color:var(--primary-deep);
  letter-spacing:.01em;
}
.hero-lead{
  margin-top:16px;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-2);
  max-width:560px;
}
.hero-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px;}
.hero-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  padding:13px 26px;
  border-radius:var(--r-btn);
  border:1.5px solid transparent;
  cursor:pointer;
  transition:background-color var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-deep);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(11,59,77,.18);}
.btn-primary:active{transform:none;box-shadow:none;}
.btn-ghost{background:transparent;color:var(--primary);border-color:rgba(18,84,107,.32);}
.btn-ghost:hover{background:var(--primary-tint);border-color:var(--primary);color:var(--primary-deep);}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  color:var(--primary);
}
.link-arrow .arw{transition:transform 160ms var(--ease);}
.link-arrow:hover .arw{transform:translateX(3px);}

/* ============ 正文主体：锚点导航 + 模块 ============ */
.cat-body{padding:96px 0 64px;}
.anchor-nav{position:sticky;top:96px;}
.anchor-nav .nav-title{
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  color:var(--ink-3);
  margin-bottom:16px;
}
.anchor-nav a{
  display:block;
  padding:12px 0 12px 16px;
  font-size:15px;
  color:var(--ink-2);
  border-left:3px solid transparent;
  transition:color var(--t),border-color var(--t),background-color var(--t);
}
.anchor-nav a:hover{color:var(--primary);background:linear-gradient(90deg,rgba(18,84,107,.05),transparent);}
.anchor-nav a.active{
  color:var(--primary-deep);
  font-weight:600;
  border-left-color:var(--accent);
  background:linear-gradient(90deg,rgba(217,113,60,.08),transparent);
}

.doc-module{
  padding-bottom:64px;
  margin-bottom:64px;
  border-bottom:1px solid var(--line-soft);
  scroll-margin-top:96px;
}
.doc-module:last-child{padding-bottom:0;margin-bottom:0;border-bottom:0;}
.doc-module h2{
  position:relative;
  font-size:32px;
  font-weight:700;
  line-height:1.3;
  color:var(--primary-deep);
  padding-left:18px;
}
.doc-module h2::before{
  content:"";
  position:absolute;
  left:0;
  top:10px;
  width:2px;
  height:24px;
  background:var(--accent);
  border-radius:2px;
}
.doc-module p{
  max-width:760px;
  margin-top:20px;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
}
.point-list{list-style:none;margin-top:24px;max-width:760px;}
.point-list li{
  position:relative;
  padding-left:20px;
  margin-bottom:12px;
  font-size:15px;
  line-height:1.8;
  color:var(--ink-2);
}
.point-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:11px;
  width:6px;
  height:6px;
  border-radius:1px;
  background:var(--accent);
}
.module-note{
  margin-top:24px;
  padding:18px 20px;
  background:var(--bg-alt);
  border-left:3px solid var(--primary);
  border-radius:0 var(--r-card) var(--r-card) 0;
  font-size:14.5px;
  line-height:1.8;
  color:var(--ink-2);
  max-width:760px;
}

/* ============ 数据带 ============ */
.stat-band{padding:64px 0 72px;background:var(--bg);}
.stat-row{border-top:1px solid rgba(18,84,107,.2);padding-top:40px;}
.stat-item{
  border-left:1px solid var(--line);
  padding-left:28px;
}
.stat-item:first-child{border-left:0;padding-left:14px;}
.stat-num{
  font-size:40px;
  font-weight:700;
  line-height:1.1;
  color:var(--primary);
  font-variant-numeric:tabular-nums;
}
.stat-num small{font-size:18px;font-weight:600;margin-left:4px;}
.stat-label{margin-top:8px;font-size:14px;color:var(--ink-2);}

/* ============ FAQ ============ */
.faq-section{padding:96px 0;background:var(--bg-alt);}
.section-head{max-width:760px;}
.section-head h2{
  font-size:32px;
  font-weight:700;
  line-height:1.3;
  color:var(--primary-deep);
}
.section-head p{margin-top:12px;font-size:15.5px;color:var(--ink-2);max-width:640px;}
.faq-wrap{max-width:860px;margin:40px auto 0;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 0;
  background:none;
  border:0;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--primary-deep);
  cursor:pointer;
  transition:color var(--t);
}
.faq-q:hover{color:var(--primary);}
.faq-icon{
  position:relative;
  flex:0 0 24px;
  width:24px;
  height:24px;
  border:1.5px solid var(--input-line);
  border-radius:50%;
  transition:transform 240ms var(--ease),border-color var(--t);
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  background:var(--primary);
  transform:translate(-50%,-50%);
  transition:background-color var(--t);
}
.faq-icon::before{width:11px;height:1.5px;}
.faq-icon::after{width:1.5px;height:11px;}
.faq-item.open .faq-icon{transform:rotate(45deg);border-color:var(--accent);}
.faq-item.open .faq-icon::before,
.faq-item.open .faq-icon::after{background:var(--accent);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 240ms var(--ease);}
.faq-a p{
  margin:0 0 20px;
  font-size:15.5px;
  line-height:1.8;
  color:var(--ink-2);
  max-width:780px;
}

/* ============ CTA 联系 ============ */
.cta-section{padding:96px 0;background:var(--primary-tint);}
.cta-inner{max-width:760px;}
.cta-inner h2{
  font-size:32px;
  font-weight:700;
  line-height:1.3;
  color:var(--primary-deep);
}
.cta-inner p{margin-top:16px;font-size:16px;line-height:1.85;color:var(--ink-2);}
.cta-actions{margin-top:32px;display:flex;flex-wrap:wrap;align-items:center;gap:24px;}
.cta-contacts{
  margin-top:28px;
  display:flex;
  flex-wrap:wrap;
  gap:32px;
  font-size:14px;
  color:var(--ink-2);
}
.cta-contacts span{display:inline-flex;align-items:center;gap:8px;}
.cta-contacts .k{color:var(--ink-3);}
.cta-contacts .v{color:var(--primary-deep);font-weight:600;font-variant-numeric:tabular-nums;}

/* ============ 页脚 ============ */
.site-footer{background:var(--primary-deep);color:rgba(255,255,255,.72);padding:72px 0 0;}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .logo{color:#fff;font-size:18px;}
.footer-brand .logo::before{background:var(--accent);}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:320px;}
.footer-social{margin-top:20px;display:flex;gap:16px;}
.footer-social a{
  font-size:13px;
  color:rgba(255,255,255,.72);
  border:1px solid rgba(255,255,255,.24);
  border-radius:var(--r-btn);
  padding:6px 14px;
  transition:color var(--t),border-color var(--t),background-color var(--t);
}
.footer-social a:hover{color:#fff;border-color:rgba(255,255,255,.6);background:rgba(255,255,255,.08);}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:rgba(255,255,255,.92);
  margin-bottom:20px;
}
.footer-col ul{list-style:none;}
.footer-col li{margin-bottom:12px;font-size:14px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#fff;text-decoration:underline;}
.footer-col .num{font-variant-numeric:tabular-nums;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);
  padding:24px 0 28px;
  display:flex;
  flex-wrap:wrap;
  gap:8px 24px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(255,255,255,.56);
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .grid-container{padding-left:20px;padding-right:20px;}
  .nav-toggle{display:flex;}
  .nav-links{
    position:fixed;
    top:0;
    right:0;
    width:280px;
    height:100vh;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:80px 0 24px;
    background:#fff;
    box-shadow:-10px 0 30px rgba(11,59,77,.10);
    transform:translateX(100%);
    transition:transform 240ms var(--ease);
    z-index:80;
    overflow-y:auto;
  }
  .nav-links.open{transform:translateX(0);}
  .nav-links a{
    line-height:52px;
    padding:0 24px;
    border-bottom:1px solid var(--line-soft);
    font-size:15px;
  }
  .nav-links a::after{display:none;}
  .nav-links a.active{box-shadow:inset 3px 0 0 var(--accent);color:var(--primary-deep);}
  .contact-link{padding:7px 14px;font-size:14px;}
  .cat-hero{padding:40px 0;}
  .hero-copy{min-height:0;}
  .cat-hero h1{font-size:32px;}
  .cat-body{padding:72px 0 48px;}
  .doc-module{padding-bottom:48px;margin-bottom:48px;}
  .doc-module h2{font-size:26px;}
  .anchor-nav{position:static;margin-bottom:32px;border-bottom:1px solid var(--line-soft);padding-bottom:24px;}
  .anchor-nav a{border-left:0;border-bottom:3px solid transparent;padding:10px 12px 10px 14px;}
  .anchor-nav a.active{border-left:0;border-bottom-color:var(--accent);}
  .stat-item{border-left:0;padding-left:14px;}
  .stat-band{padding:48px 0 56px;}
  .faq-section,.cta-section{padding:72px 0;}
  .section-head h2,.cta-inner h2{font-size:26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:639px){
  .nav-inner{height:60px;}
  .nav-links a{line-height:52px;}
  .cat-hero h1{font-size:28px;}
  .hero-lead{font-size:15.5px;}
  .cat-body{padding:56px 0 32px;}
  .doc-module h2{font-size:23px;padding-left:14px;}
  .doc-module h2::before{height:20px;top:8px;}
  .doc-module p,.point-list li,.module-note{font-size:15.5px;}
  .stat-num{font-size:32px;}
  .stat-num small{font-size:16px;}
  .faq-section,.cta-section{padding:56px 0;}
  .section-head h2,.cta-inner h2{font-size:23px;}
  .faq-q{font-size:16px;}
  .btn{padding:12px 22px;width:100%;justify-content:center;}
  .cta-actions{gap:16px;}
  .cta-contacts{gap:16px;flex-direction:column;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .site-footer{padding-top:56px;}
  .footer-bottom{flex-direction:column;}
}

/* roulang page: category2 */
:root{
  --primary:#12546B;
  --primary-deep:#0B3B4D;
  --primary-mid:#2E7C93;
  --primary-tint:#E9F1F3;
  --accent:#D9713C;
  --accent-hover:#B85A2B;
  --accent-tint:#FBEEE7;
  --bg:#FFFFFF;
  --bg-alt:#F6F8F8;
  --text:#1F2A2E;
  --text-2:#5A6A70;
  --text-3:#8A979C;
  --line:#E2E8E9;
  --line-soft:#EDF1F2;
  --radius-card:10px;
  --radius-btn:8px;
  --radius-badge:4px;
  --shadow-card:0 1px 2px rgba(11,59,77,.05),0 8px 24px rgba(11,59,77,.06);
  --shadow-card-hover:0 2px 4px rgba(11,59,77,.06),0 16px 36px rgba(11,59,77,.10);
  --ease:cubic-bezier(.2,.6,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;line-height:1.8;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--primary);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--primary-deep);}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.grid-container{max-width:1200px;margin:0 auto;padding-left:32px;padding-right:32px;width:100%;}

/* ===== 导航 ===== */
.site-header{
  position:sticky;top:0;z-index:70;background:#fff;border-bottom:1px solid var(--line-soft);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-stuck{box-shadow:0 1px 0 var(--line);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px;}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:19px;font-weight:700;letter-spacing:.01em;color:var(--primary-deep);
}
.logo::before{content:"";width:3px;height:20px;background:var(--accent);border-radius:2px;display:block;}
.logo:hover{color:var(--primary);}
.nav-links{display:flex;align-items:center;gap:32px;}
.nav-links a{
  position:relative;display:flex;align-items:center;height:72px;
  font-size:15px;font-weight:500;color:var(--text-2);
}
.nav-links a::after{
  content:"";position:absolute;left:50%;bottom:22px;transform:translateX(-50%);
  width:0;height:1.5px;background:rgba(18,84,107,.4);transition:width .2s var(--ease);
}
.nav-links a:hover{color:var(--primary);}
.nav-links a:hover::after{width:16px;}
.nav-links a.active{color:var(--primary-deep);font-weight:600;}
.nav-links a.active::after{width:16px;height:2px;background:var(--primary);bottom:20px;}
.nav-side{display:flex;align-items:center;gap:14px;}
.contact-link{
  font-size:15px;font-weight:500;color:var(--text-2);
  padding:9px 16px;border:1px solid var(--line);border-radius:var(--radius-btn);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.contact-link:hover{color:var(--primary);border-color:rgba(18,84,107,.4);background:var(--primary-tint);}
.nav-toggle{display:none;width:40px;height:40px;flex-direction:column;justify-content:center;align-items:flex-end;gap:5px;}
.nav-toggle span{display:block;width:20px;height:1.5px;background:var(--primary-deep);transition:transform .2s var(--ease),opacity .2s var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}
.nav-mask{
  position:fixed;inset:0;background:rgba(11,59,77,.35);z-index:65;
  opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s var(--ease);
}
.nav-mask.is-open{opacity:1;visibility:visible;}

/* ===== 面包屑 ===== */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:24px 0 16px;font-size:13px;color:var(--text-2);}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-3);}
.breadcrumb .current{color:var(--primary-deep);font-weight:600;}

/* ===== Hero ===== */
.hero-cat{background:var(--bg-alt);padding:32px 0 64px;position:relative;overflow:hidden;}
.hero-cat::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(18,84,107,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(18,84,107,.035) 1px,transparent 1px);
  background-size:56px 56px;
}
.hero-cat .grid-x{position:relative;z-index:1;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;font-weight:600;letter-spacing:.18em;color:var(--accent);
}
.eyebrow::before{content:"";width:2px;height:16px;background:var(--accent);display:block;}
.hero-cat h1{
  font-size:44px;font-weight:700;line-height:1.24;letter-spacing:-.01em;
  color:var(--primary-deep);margin:18px 0 20px;
}
.hero-desc{font-size:16px;line-height:1.8;color:var(--text-2);max-width:520px;}
.hero-meta{margin-top:22px;font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;}
.hero-figure{
  border-radius:var(--radius-card);overflow:hidden;aspect-ratio:16/10;
  box-shadow:var(--shadow-card);background:var(--primary-tint);
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}

/* ===== 板块 ===== */
.section{padding:96px 0;}
.section--alt{background:var(--bg-alt);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:32px;font-weight:700;line-height:1.3;color:var(--primary-deep);letter-spacing:-.01em;margin-top:14px;}
.section-head p{font-size:16px;line-height:1.85;color:var(--text-2);margin-top:14px;}

/* ===== 图文交替 ===== */
.media-row{padding:40px 0;}
.media-row:first-of-type{padding-top:0;}
.media-row + .media-row{border-top:1px solid var(--line-soft);}
.media-figure{border-radius:var(--radius-card);overflow:hidden;aspect-ratio:16/10;background:var(--primary-tint);}
.media-figure img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease);}
.media-figure:hover img{transform:scale(1.03);}
.media-body h3{font-size:22px;font-weight:600;line-height:1.4;color:var(--primary-deep);margin-bottom:14px;}
.media-body p{font-size:15.5px;line-height:1.85;color:var(--text-2);margin-bottom:18px;max-width:520px;}
.point-list li{position:relative;padding-left:18px;font-size:14.5px;line-height:1.75;color:var(--text-2);margin-bottom:8px;}
.point-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:1px;background:var(--accent);}

/* ===== 按钮与文字链 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;padding:13px 26px;border-radius:var(--radius-btn);
  border:1.5px solid transparent;cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-deep);color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(11,59,77,.18);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:transparent;border-color:rgba(18,84,107,.32);color:var(--primary);}
.btn-ghost:hover{border-color:var(--primary);background:var(--primary-tint);color:var(--primary-deep);}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary);}
.link-arrow svg{width:14px;height:14px;transition:transform .16s var(--ease);}
.link-arrow:hover{color:var(--primary-deep);}
.link-arrow:hover svg{transform:translateX(3px);}

/* ===== 分类卡片网格 ===== */
.entry-card{
  position:relative;display:flex;gap:18px;height:100%;padding:28px;
  background:#fff;border-radius:var(--radius-card);box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.entry-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent);
  opacity:0;transition:opacity .12s var(--ease);
}
.entry-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-card-hover);}
.entry-card:hover::before{opacity:1;}
.entry-icon{
  flex:0 0 40px;width:40px;height:40px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-tint);color:var(--primary);
}
.entry-icon svg{width:20px;height:20px;}
.entry-body{display:flex;flex-direction:column;flex:1 1 auto;}
.entry-body h3{font-size:18px;font-weight:600;line-height:1.5;color:var(--primary-deep);margin-bottom:10px;}
.entry-body p{font-size:14.5px;line-height:1.75;color:var(--text-2);margin-bottom:18px;}
.entry-body .link-arrow{margin-top:auto;font-size:14px;}

/* ===== 数据带 ===== */
.metrics{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid rgba(18,84,107,.2);padding-top:44px;margin-top:8px;}
.metric{padding:0 32px;position:relative;}
.metric:first-child{padding-left:0;}
.metric + .metric{border-left:1px solid var(--line);}
.metric .num{font-size:40px;font-weight:700;line-height:1.1;color:var(--primary);font-variant-numeric:tabular-nums;}
.metric .num span{font-size:18px;font-weight:600;margin-left:4px;}
.metric .label{font-size:14px;line-height:1.7;color:var(--text-2);margin-top:12px;}

/* ===== 引言带 ===== */
.quote-band{background:var(--primary-tint);padding:56px 0;}
.quote-inner{max-width:860px;margin:0 auto;border-left:3px solid var(--accent);padding-left:24px;}
.quote-inner h2{font-size:22px;font-weight:600;line-height:1.4;color:var(--primary-deep);margin-bottom:12px;}
.quote-inner p{font-size:16px;line-height:1.85;color:var(--text-2);}

/* ===== 联系 ===== */
.contact-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:start;}
.contact-lead h2{font-size:32px;font-weight:700;line-height:1.3;color:var(--primary-deep);letter-spacing:-.01em;margin-bottom:16px;}
.contact-lead p{font-size:16px;line-height:1.85;color:var(--text-2);margin-bottom:24px;max-width:520px;}
.contact-list{border-top:1px solid var(--line-soft);}
.contact-item{display:flex;gap:14px;padding:18px 0;border-bottom:1px solid var(--line-soft);}
.contact-item svg{flex:0 0 18px;width:18px;height:18px;color:var(--primary);margin-top:5px;}
.contact-item h4{font-size:14px;font-weight:600;color:var(--text);margin-bottom:4px;}
.contact-item p{font-size:14px;line-height:1.65;color:var(--text-2);font-variant-numeric:tabular-nums;}

/* ===== 页脚 ===== */
.site-footer{background:var(--primary-deep);padding:72px 0 32px;color:rgba(255,255,255,.72);}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;}
.footer-brand .logo{color:#fff;font-size:19px;font-weight:700;margin-bottom:16px;}
.footer-brand .logo:hover{color:#fff;}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:320px;}
.footer-social{display:flex;gap:18px;margin-top:20px;}
.footer-social a{font-size:14px;color:rgba(255,255,255,.72);border-bottom:1px solid rgba(255,255,255,.2);padding-bottom:2px;}
.footer-social a:hover{color:#fff;border-bottom-color:rgba(255,255,255,.6);}
.footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.92);margin-bottom:18px;}
.footer-col ul li{margin-bottom:12px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#fff;text-decoration:underline;}
.footer-col span{font-size:14px;color:rgba(255,255,255,.72);font-variant-numeric:tabular-nums;}
.footer-bottom{
  margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.56);}

/* ===== 断点 ===== */
@media (max-width:1199px){
  .hero-cat h1{font-size:38px;}
}
@media (max-width:1023px){
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;width:280px;z-index:80;
    flex-direction:column;align-items:stretch;gap:0;padding-top:72px;
    background:#fff;border-left:1px solid var(--line-soft);
    box-shadow:-12px 0 36px rgba(11,59,77,.10);
    transform:translateX(100%);
    transition:transform .28s var(--ease);
  }
  .nav-links.is-open{transform:translateX(0);}
  .nav-links a{height:52px;padding:0 24px;border-bottom:1px solid var(--line-soft);border-left:3px solid transparent;font-size:15px;}
  .nav-links a::after{display:none;}
  .nav-links a.active{border-left-color:var(--accent);color:var(--primary-deep);}
  .nav-toggle{display:flex;}
  .section{padding:72px 0;}
  .hero-cat{padding:24px 0 56px;}
  .hero-cat h1{font-size:32px;margin:14px 0 16px;}
  .hero-figure{margin-top:32px;}
  .section-head h2,.contact-lead h2{font-size:24px;}
  .media-row{padding:32px 0;}
  .media-body{margin-top:20px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px;}
  .contact-wrap{grid-template-columns:1fr;gap:40px;}
}
@media (max-width:639px){
  .grid-container{padding-left:20px;padding-right:20px;}
  .section{padding:56px 0;}
  .hero-cat h1{font-size:27px;}
  .hero-desc{font-size:15.5px;}
  .media-body h3{font-size:19px;}
  .entry-card{padding:20px;gap:14px;}
  .metrics{grid-template-columns:repeat(2,1fr);row-gap:32px;padding-top:32px;}
  .metric{padding:0;}
  .metric + .metric{border-left:none;}
  .metric .num{font-size:32px;}
  .metric .num span{font-size:15px;}
  .quote-band{padding:40px 0;}
  .quote-inner{padding-left:18px;}
  .quote-inner h2{font-size:19px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .site-footer{padding:56px 0 28px;}
  .footer-bottom{margin-top:36px;}
  .btn{width:100%;}
  .contact-link{display:none;}
}