/* roulang page: index */
:root{
  --brand:#1D5B8F;
  --brand-dark:#14456E;
  --brand-light:#E8F2FA;
  --brand-line:#CFE2F1;
  --accent:#E2653C;
  --accent-dark:#C9542E;
  --ink:#16222E;
  --ink2:#4A5C6B;
  --ink3:#8896A3;
  --bg:#FFFFFF;
  --bg-alt:#F5F8FB;
  --line:#E7EEF4;
  --line-soft:#F0F4F8;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:14px;
  --r-pill:999px;
  --r-cta:18px;
  --sh1:0 1px 2px rgba(17,42,66,.05),0 10px 28px -14px rgba(17,42,66,.20);
  --sh2:0 4px 10px rgba(17,42,66,.08),0 22px 44px -20px rgba(17,42,66,.30);
  --dur:180ms;
  --bs-body-color:#16222E;
  --bs-body-bg:#FFFFFF;
  --bs-border-radius:14px;
  --bs-border-color:#E7EEF4;
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --bs-link-color:#1D5B8F;
  --bs-link-hover-color:#14456E;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color var(--dur) ease;}
a:hover{color:var(--brand-dark);}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:92px 0;}
.section-alt{background:var(--bg-alt);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap;}
.sec-title{position:relative;padding-left:14px;font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:700;color:var(--ink);}
.sec-title::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:22px;border-radius:2px;background:var(--brand);}
.sec-lead{max-width:62ch;font-size:17px;line-height:1.8;color:var(--ink2);margin-top:14px;}
.link-more{font-size:15px;font-weight:600;color:var(--brand);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;white-space:nowrap;}
.link-more:hover{color:var(--brand-dark);}

/* 导航 */
.site-header{position:sticky;top:0;z-index:1030;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow var(--dur) ease;}
.site-header.is-scrolled{box-shadow:0 8px 24px -16px rgba(17,42,66,.35);}
.nav-bar{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--brand);display:grid;place-items:center;flex-shrink:0;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.3px;}
.brand-text i{font-style:normal;font-size:12px;font-weight:500;color:var(--ink3);letter-spacing:.5px;}
.nav-toggle{width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);display:none;align-items:center;justify-content:center;color:var(--ink2);}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand);}
.nav-panel{display:flex;align-items:center;flex:1 1 auto;gap:20px;min-width:0;}
.nav-left{flex:1 1 58%;display:flex;align-items:center;min-width:0;}
.nav-right{flex:1 1 42%;display:flex;align-items:center;justify-content:flex-end;gap:12px;min-width:0;}
@media (min-width:1200px){
  .nav-left{border-right:1px solid var(--line);padding-right:20px;}
  .nav-right{padding-left:20px;}
}
.nav-menu{display:flex;align-items:center;gap:2px;}
.nav-menu a{display:inline-flex;align-items:center;height:44px;padding:0 12px;font-size:15px;font-weight:500;color:var(--ink2);border-bottom:2px solid transparent;transition:color var(--dur) ease,border-color var(--dur) ease;}
.nav-menu a:hover{color:var(--brand);}
.nav-menu a.active{color:var(--brand);font-weight:600;border-bottom-color:var(--brand);}
.nav-search{position:relative;display:flex;align-items:center;}
.nav-search svg{position:absolute;left:11px;width:16px;height:16px;color:var(--ink3);pointer-events:none;}
.nav-search input{height:38px;width:190px;border:1px solid var(--line);border-radius:var(--r-input);padding:0 12px 0 33px;font-size:14px;color:var(--ink);background:#fff;transition:border-color var(--dur) ease,box-shadow var(--dur) ease,width var(--dur) ease;}
.nav-search input::placeholder{color:var(--ink3);}
.nav-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,91,143,.08);width:220px;}
.btn-accent{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 22px;background:var(--accent);color:#fff;border:1px solid var(--accent);border-radius:var(--r-btn);font-size:15px;font-weight:600;transition:background var(--dur) ease,transform var(--dur) ease,border-color var(--dur) ease;}
.btn-accent:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff;transform:translateY(-1px);}
.btn-outline{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 22px;background:transparent;color:var(--brand);border:1.5px solid var(--brand);border-radius:var(--r-btn);font-size:15px;font-weight:600;transition:background var(--dur) ease,color var(--dur) ease,transform var(--dur) ease;}
.btn-outline:hover{background:rgba(29,91,143,.06);color:var(--brand-dark);transform:translateY(-1px);}
.btn-xs{height:38px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}

/* Hero */
.hero{position:relative;padding:48px 0 96px;background:linear-gradient(180deg,#FFFFFF 0%,#F5F8FB 100%);overflow:hidden;}
.hero::after{content:"";position:absolute;right:-8%;bottom:-24%;width:540px;height:540px;border-radius:50%;background:radial-gradient(circle,rgba(29,91,143,.10) 0%,rgba(29,91,143,0) 70%);pointer-events:none;}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;border-radius:var(--r-pill);background:var(--brand-light);color:var(--brand);font-size:13px;font-weight:600;letter-spacing:.3px;margin-bottom:20px;}
.hero-title{font-size:clamp(30px,4vw,46px);line-height:1.25;font-weight:700;letter-spacing:-.5px;color:var(--ink);max-width:15em;}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.8;color:var(--ink2);max-width:34em;}
.hero-sub span{display:block;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line);}
.hero-stat b{display:block;font-size:28px;font-weight:700;color:var(--brand);letter-spacing:-.5px;line-height:1.2;}
.hero-stat span{display:block;margin-top:6px;font-size:13px;color:var(--ink3);}
.hero-visual{position:relative;border-radius:var(--r-img);overflow:hidden;box-shadow:var(--sh1);}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.hero-float{position:absolute;left:24px;bottom:24px;right:24px;background:rgba(232,242,250,.96);border:1px solid var(--brand-line);border-radius:12px;padding:16px 18px;display:flex;align-items:center;gap:14px;}
.hero-float b{font-size:20px;font-weight:700;color:var(--brand-dark);}
.hero-float span{font-size:13px;color:var(--ink2);line-height:1.6;}

/* 价值主张 2+1 */
.value-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.value-wide{grid-column:1 / -1;}
.card-soft{background:#fff;border:1px solid #EDF2F7;border-radius:var(--r-card);padding:24px;height:100%;transition:transform var(--dur) ease,box-shadow var(--dur) ease,border-color var(--dur) ease;}
.card-soft:hover{transform:translateY(-2px);box-shadow:var(--sh2);border-color:rgba(29,91,143,.15);}
.icon-box{width:44px;height:44px;border-radius:12px;background:var(--brand-light);display:grid;place-items:center;color:var(--brand);margin-bottom:16px;}
.icon-box svg{width:24px;height:24px;}
.card-soft h3{font-size:19px;line-height:1.4;font-weight:600;color:var(--ink);margin-bottom:10px;}
.card-soft p{font-size:15px;line-height:1.8;color:var(--ink2);}
.value-wide{display:flex;gap:24px;align-items:center;}
.value-wide .icon-box{margin-bottom:0;flex-shrink:0;}

/* 功能分组 */
.func-layout{display:grid;grid-template-columns:40% 60%;gap:40px;align-items:start;}
.pill-index{display:flex;flex-direction:column;gap:10px;position:sticky;top:88px;}
.pill-index a{display:flex;align-items:center;gap:14px;padding:16px 18px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:600;font-size:15px;transition:border-color var(--dur) ease,background var(--dur) ease,color var(--dur) ease;}
.pill-index a em{font-style:normal;font-size:14px;font-weight:700;color:var(--brand);letter-spacing:.5px;}
.pill-index a span{font-size:13px;font-weight:500;color:var(--ink3);margin-left:auto;}
.pill-index a:hover{border-color:rgba(29,91,143,.35);color:var(--brand);}
.pill-index a.active{background:var(--brand-light);border-color:var(--brand-line);color:var(--brand-dark);}
.func-cards{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.func-card .mini-tag{display:inline-block;font-size:12px;font-weight:600;color:var(--brand);background:var(--brand-light);border-radius:var(--r-pill);padding:3px 10px;margin-bottom:12px;}
.func-card h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.func-card p{font-size:14.5px;color:var(--ink2);line-height:1.75;margin-bottom:14px;}
.func-card .link-more{font-size:14px;}

/* 场景 */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:36px 0;}
.scene + .scene{border-top:1px solid var(--line-soft);}
.scene.reverse .scene-text{order:2;}
.scene.reverse .scene-media{order:1;}
.scene-media{border-radius:var(--r-img);overflow:hidden;box-shadow:var(--sh1);}
.scene-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.scene-text h3{font-size:20px;font-weight:600;color:var(--ink);margin-bottom:12px;line-height:1.4;}
.scene-text p{font-size:15.5px;color:var(--ink2);}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.tag{display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--r-pill);background:var(--brand-light);color:var(--brand);font-size:13px;font-weight:600;}

/* 案例 */
.case{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;padding:32px 0;}
.case + .case{border-top:1px solid var(--line-soft);}
.case.reverse .case-text{order:2;}
.case.reverse .case-media{order:1;}
.case-media{border-radius:var(--r-img);overflow:hidden;box-shadow:var(--sh1);}
.case-media img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.case-text .case-num{font-size:34px;font-weight:700;color:var(--brand);line-height:1.1;letter-spacing:-1px;}
.case-text .case-num small{font-size:16px;font-weight:600;color:var(--ink2);margin-left:6px;letter-spacing:0;}
.case-text h3{font-size:19px;font-weight:600;margin:14px 0 10px;}
.case-text p{font-size:15px;color:var(--ink2);}
.case-name{margin-top:16px;font-size:13px;color:var(--ink3);}

/* 价格 */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch;}
.price-card{position:relative;background:#fff;border:1px solid #EDF2F7;border-radius:var(--r-card);padding:28px;display:flex;flex-direction:column;transition:transform var(--dur) ease,box-shadow var(--dur) ease,border-color var(--dur) ease;}
.price-card:hover{transform:translateY(-2px);box-shadow:var(--sh2);}
.price-card.featured{border:2px solid var(--brand);transform:scale(1.02);box-shadow:var(--sh2);}
.price-card.featured:hover{transform:scale(1.02) translateY(-2px);}
.price-badge{position:absolute;top:-13px;left:28px;height:26px;padding:0 14px;border-radius:var(--r-pill);background:var(--accent);color:#fff;font-size:12px;font-weight:700;display:inline-flex;align-items:center;letter-spacing:.5px;}
.price-name{font-size:16px;font-weight:700;color:var(--ink);}
.price-amount{margin:14px 0 4px;font-size:34px;font-weight:700;color:var(--brand-dark);line-height:1.1;letter-spacing:-1px;}
.price-amount small{font-size:14px;font-weight:500;color:var(--ink3);margin-left:4px;letter-spacing:0;}
.price-desc{font-size:13.5px;color:var(--ink3);margin-bottom:20px;}
.price-list{display:flex;flex-direction:column;gap:12px;margin-bottom:24px;}
.price-list li{display:flex;gap:10px;font-size:14.5px;color:var(--ink2);line-height:1.6;}
.price-list svg{width:18px;height:18px;flex-shrink:0;margin-top:3px;color:var(--brand);}
.price-card .btn-accent,.price-card .btn-outline{margin-top:auto;}
.price-note{margin-top:20px;font-size:13px;color:var(--ink3);text-align:center;}

/* 资讯列表 */
.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.info-card{display:flex;flex-direction:column;background:#fff;border:1px solid #EDF2F7;border-radius:var(--r-card);overflow:hidden;height:100%;transition:transform var(--dur) ease,box-shadow var(--dur) ease,border-color var(--dur) ease;}
.info-card:hover{transform:translateY(-2px);box-shadow:var(--sh2);border-color:rgba(29,91,143,.15);}
.info-cover{aspect-ratio:16/9;overflow:hidden;background:var(--brand-light);}
.info-cover img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease;}
.info-card:hover .info-cover img{transform:scale(1.03);}
.info-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.badge-cat{display:inline-flex;align-items:center;align-self:flex-start;height:26px;padding:0 12px;border-radius:var(--r-pill);background:var(--brand-light);color:var(--brand);font-size:13px;font-weight:600;margin-bottom:12px;}
.info-title{font-size:17px;font-weight:600;line-height:1.5;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:51px;}
.info-card:hover .info-title{color:var(--brand);}
.info-desc{margin-top:10px;font-size:14px;color:var(--ink2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.info-meta{margin-top:16px;padding-top:14px;border-top:1px solid var(--line-soft);font-size:13px;color:var(--ink3);display:flex;align-items:center;gap:8px;}
.info-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink3);display:inline-block;}
.empty-state{grid-column:1 / -1;min-height:180px;border:1.5px dashed var(--brand-line);border-radius:var(--r-card);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;padding:32px 24px;background:#fff;}
.empty-state svg{width:32px;height:32px;color:var(--ink3);}
.empty-state p{font-size:15px;color:var(--ink2);}

/* FAQ */
.faq-wrap{max-width:900px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden;transition:border-color var(--dur) ease,box-shadow var(--dur) ease;}
.faq-item:hover{border-color:rgba(29,91,143,.25);}
.faq-btn{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 22px;background:transparent;border:0;text-align:left;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;transition:color var(--dur) ease;}
.faq-btn:hover{color:var(--brand);}
.faq-btn .chev{width:18px;height:18px;flex-shrink:0;color:var(--ink3);transition:transform var(--dur) ease;}
.faq-btn[aria-expanded="true"] .chev{transform:rotate(180deg);}
.faq-body{padding:0 22px 22px;font-size:15px;color:var(--ink2);line-height:1.85;border-left:3px solid transparent;transition:border-color var(--dur) ease;}
.faq-item.open{border-color:var(--brand-line);}
.faq-item.open .faq-body{border-left-color:var(--accent);padding-left:19px;}

/* CTA 带 */
.cta-band{background:var(--brand-light);border:1px solid var(--brand-line);border-radius:var(--r-cta);padding:40px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;color:var(--brand-dark);line-height:1.35;margin:0;}
.cta-band p{margin-top:8px;font-size:15px;color:var(--ink2);}

/* 页脚 */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:72px 0 0;}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.foot-brand .brand-text b{font-size:17px;}
.foot-desc{font-size:14px;color:var(--ink2);line-height:1.8;max-width:34ch;}
.foot-title{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:16px;}
.foot-list li{margin-bottom:10px;}
.foot-list a{font-size:14px;color:var(--ink2);}
.foot-list a:hover{color:var(--brand);}
.foot-list span{font-size:14px;color:var(--ink2);}
.foot-bottom{margin-top:56px;border-top:1px solid var(--line);padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--ink3);}

@media (max-width:1199.98px){
  .nav-search input{width:160px;}
  .nav-search input:focus{width:180px;}
}
@media (max-width:991.98px){
  .section{padding:64px 0;}
  .hero{padding:36px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-title{max-width:none;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .nav-panel{flex:1 1 100%;}
  .nav-panel.show,.nav-panel.collapsing{display:flex;flex-direction:column;align-items:stretch;gap:14px;padding-bottom:18px;}
  .nav-left,.nav-right{flex:1 1 auto;flex-direction:column;align-items:stretch;width:100%;gap:0;}
  .nav-right{border-top:1px solid var(--line);padding-top:16px;gap:12px;}
  .nav-menu{flex-direction:column;align-items:stretch;}
  .nav-menu a{height:48px;justify-content:flex-start;border-bottom:1px solid var(--line-soft);border-left:2px solid transparent;padding:0 14px;}
  .nav-menu a.active{border-left-color:var(--brand);border-bottom-color:var(--line-soft);background:var(--brand-light);}
  .nav-search input{width:100%;}
  .nav-search input:focus{width:100%;}
  .value-grid{grid-template-columns:1fr;}
  .value-wide{flex-direction:column;align-items:flex-start;}
  .func-layout{grid-template-columns:1fr;gap:28px;}
  .pill-index{position:static;flex-direction:row;overflow-x:auto;padding-bottom:6px;gap:12px;}
  .pill-index a{white-space:nowrap;padding:12px 16px;}
  .pill-index a span{display:none;}
  .scene,.case{grid-template-columns:1fr;gap:24px;padding:28px 0;}
  .scene.reverse .scene-text,.case.reverse .case-text{order:1;}
  .scene.reverse .scene-media,.case.reverse .case-media{order:2;}
  .price-grid{grid-template-columns:1fr;gap:28px;}
  .price-card.featured{transform:none;}
  .price-card.featured:hover{transform:translateY(-2px);}
  .info-grid{grid-template-columns:1fr 1fr;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{padding:32px;}
}
@media (max-width:767.98px){
  .section{padding:48px 0;}
  .hero{padding:28px 0 48px;}
  .container{padding:0 20px;}
  .hero-stats{grid-template-columns:1fr;gap:16px;padding-top:22px;}
  .hero-stat b{font-size:24px;}
  .func-cards{grid-template-columns:1fr;}
  .info-grid{grid-template-columns:1fr;}
  .faq-btn{padding:16px 18px;font-size:15px;}
  .faq-body{padding:0 18px 18px;}
  .faq-item.open .faq-body{padding-left:15px;}
  .cta-band{padding:26px;border-radius:16px;}
  .cta-band .btn-accent,.cta-band .btn-outline{width:100%;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .foot-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:575.98px){
  .hero-title{font-size:28px;}
  .hero-actions .btn-accent,.hero-actions .btn-outline{width:100%;}
  .price-amount{font-size:30px;}
  .case-text .case-num{font-size:28px;}
}

/* roulang page: article */
:root{
  --brand:#1D5B8F;
  --brand-deep:#14456E;
  --brand-soft:#E8F2FA;
  --brand-line:#CFE2F1;
  --accent:#E2653C;
  --accent-deep:#C9522C;
  --ink:#16222E;
  --ink-2:#4A5C6B;
  --ink-3:#8896A3;
  --bg:#FFFFFF;
  --bg-alt:#F5F8FB;
  --line:#E7EEF4;
  --line-2:#F0F4F8;
  --card-line:#EDF2F7;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-band:18px;
  --r-badge:999px;
  --sh-1:0 1px 2px rgba(17,42,66,.05), 0 10px 28px -14px rgba(17,42,66,.20);
  --sh-2:0 2px 6px rgba(17,42,66,.07), 0 18px 42px -16px rgba(17,42,66,.30);
  --t:180ms ease;
  --font:-apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  --bs-primary:#1D5B8F;
  --bs-body-color:#16222E;
  --bs-body-bg:#FFFFFF;
  --bs-border-radius:14px;
  --bs-border-color:#E7EEF4;
  --bs-font-sans-serif:var(--font);
  --bs-link-color:#1D5B8F;
  --bs-link-hover-color:#14456E;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color var(--t),border-color var(--t),background-color var(--t)}
a:hover{color:var(--brand-deep)}
h1,h2,h3,h4{margin:0;color:var(--ink)}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.sec-title{position:relative;padding-left:14px;font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:700;letter-spacing:-.2px}
.sec-title::before{content:"";position:absolute;left:0;top:.22em;width:4px;height:22px;background:var(--brand);border-radius:2px}
.sec-sub{max-width:62ch;color:var(--ink-2);font-size:17px;line-height:1.8;margin:14px 0 0}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:0;z-index:1030;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow var(--t)}
.site-header.is-scrolled{box-shadow:0 8px 22px -16px rgba(17,42,66,.45)}
.nav-bar{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink)}
.brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-deep));display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text b{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.2px}
.brand-text i{font-size:12px;font-style:normal;font-weight:500;color:var(--ink-3);letter-spacing:.02em}
.nav-toggle{display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);align-items:center;justify-content:center}
.nav-toggle:hover{border-color:var(--brand-line);color:var(--brand)}
.nav-panel{flex:1 1 auto;display:flex;align-items:center;justify-content:space-between;gap:24px}
.nav-menu{display:flex;align-items:center;gap:26px}
.nav-menu a{position:relative;display:inline-block;padding:20px 0;font-size:15px;font-weight:500;color:var(--ink-2)}
.nav-menu a:hover{color:var(--brand)}
.nav-menu a.active{color:var(--brand);font-weight:600}
.nav-menu a.active::after{content:"";position:absolute;left:0;right:0;bottom:12px;height:2px;background:var(--brand);border-radius:2px}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-search{position:relative;display:flex;align-items:center}
.nav-search svg{position:absolute;left:12px;width:16px;height:16px;color:var(--ink-3);pointer-events:none}
.nav-search input{height:38px;width:230px;padding:0 12px 0 36px;border:1px solid var(--line);border-radius:var(--r-input);background:var(--bg-alt);font-size:14px;color:var(--ink);transition:var(--t)}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search input:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(29,91,143,.10)}
.btn-accent{display:inline-flex;align-items:center;justify-content:center;height:38px;padding:0 16px;border-radius:var(--r-btn);background:var(--accent);color:#fff;font-size:14px;font-weight:600;border:1px solid transparent;white-space:nowrap;transition:var(--t)}
.btn-accent:hover{background:var(--accent-deep);color:#fff;transform:translateY(-1px)}
.btn-xs{height:36px}

/* ---------- hero / breadcrumb ---------- */
.page-hero{background:linear-gradient(180deg,#fff 0%,var(--bg-alt) 100%);border-bottom:1px solid var(--line);padding:38px 0 34px}
.breadcrumb-x{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:16px;line-height:1.6}
.breadcrumb-x a{color:var(--ink-3)}
.breadcrumb-x a:hover{color:var(--brand)}
.breadcrumb-x .sep{color:#C6D2DC}
.breadcrumb-x .current{color:var(--brand);font-weight:600}
.article-title{font-size:clamp(24px,3vw,34px);line-height:1.4;font-weight:700;letter-spacing:-.4px;max-width:760px;margin:0 0 14px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--ink-3)}
.meta-dot{width:4px;height:4px;border-radius:50%;background:#C6D2DC;display:inline-block}
.badge-soft{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-badge);background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600}
.badge-accent{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-badge);background:#FDEDE7;color:var(--accent-deep);font-size:13px;font-weight:600}

/* ---------- article layout ---------- */
.article-wrap{padding:48px 0 72px}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:48px;align-items:start}
.article-main{min-width:0}
.article-body{max-width:780px;font-size:17px;line-height:1.95;color:var(--ink)}
.article-body > p:first-of-type{font-size:16px;line-height:1.85;color:var(--ink-2);padding-bottom:18px;border-bottom:1px solid var(--line-2);margin-bottom:26px}
.article-body h2{position:relative;font-size:24px;line-height:1.4;font-weight:700;margin:40px 0 14px;padding-left:14px}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;width:4px;height:22px;background:var(--brand);border-radius:2px}
.article-body h3{font-size:20px;line-height:1.45;font-weight:600;margin:28px 0 10px}
.article-body p{margin:0 0 1.2em}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.4em;list-style:revert}
.article-body li{margin:0 0 .55em;line-height:1.9}
.article-body blockquote{margin:24px 0;padding:16px 20px;background:var(--brand-soft);border-left:4px solid var(--brand);border-radius:0 12px 12px 0;color:var(--ink-2)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:20px 0}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:-8px}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:20px 0;background:#fff}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--bg-alt);font-weight:600}
.article-body code{background:var(--bg-alt);padding:2px 6px;border-radius:6px;font-size:15px}

/* ---------- sidebar ---------- */
.article-side{position:sticky;top:88px}
.side-card{background:#fff;border:1px solid var(--card-line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-1);margin-bottom:20px}
.side-card h3{font-size:16px;font-weight:600;margin:0 0 12px;padding-bottom:10px;border-bottom:1px solid var(--line-2)}
.toc-list li a{display:flex;align-items:center;gap:8px;padding:9px 0;font-size:14px;color:var(--ink-2);border-bottom:1px solid var(--line-2)}
.toc-list li:last-child a{border-bottom:0}
.toc-list li a:hover{color:var(--brand)}
.toc-list li a span{color:var(--brand);font-weight:600}
.side-link{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 0;font-size:14px;color:var(--ink-2);border-bottom:1px solid var(--line-2)}
.side-link:last-child{border-bottom:0}
.side-link:hover{color:var(--brand)}
.side-link svg{width:16px;height:16px;color:var(--ink-3);flex:0 0 auto}
.side-note{font-size:13px;color:var(--ink-3);line-height:1.75}

/* ---------- related ---------- */
.related-sec{padding:64px 0 0}
.related-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--card-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform var(--t),box-shadow var(--t),border-color var(--t);height:100%}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(29,91,143,.15)}
.post-card .thumb{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--bg-alt)}
.post-card .pc-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card h3{font-size:17px;line-height:1.45;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card p{font-size:14px;color:var(--ink-2);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{font-size:13px;color:var(--ink-3);display:flex;align-items:center;gap:8px;margin-top:auto}

/* ---------- prev / next ---------- */
.pn-sec{margin-top:44px}
.pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;padding-top:28px;border-top:1px solid var(--line)}
.pn-item{display:flex;flex-direction:column;gap:6px;padding:18px 20px;border:1px solid var(--card-line);border-radius:var(--r-card);background:#fff;box-shadow:var(--sh-1);transition:var(--t)}
.pn-item:hover{transform:translateY(-2px);border-color:rgba(29,91,143,.2);box-shadow:var(--sh-2)}
.pn-label{font-size:13px;color:var(--ink-3)}
.pn-title{font-size:16px;font-weight:600;color:var(--ink);line-height:1.5}
.pn-back{margin:20px 0 0;font-size:14px}
.pn-back a{font-weight:600;text-decoration:underline;text-underline-offset:3px}

/* ---------- cta band ---------- */
.cta-sec{padding:56px 0 72px}
.cta-band{background:var(--brand-soft);border:1px solid var(--brand-line);border-radius:var(--r-band);padding:32px 36px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);line-height:1.35;font-weight:700;margin:0 0 8px}
.cta-band p{margin:0;color:var(--ink-2);font-size:15px;max-width:56ch}
.btn-primary-x{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 22px;border-radius:var(--r-btn);background:var(--accent);color:#fff;font-weight:600;border:1px solid transparent;white-space:nowrap;transition:var(--t)}
.btn-primary-x:hover{background:var(--accent-deep);color:#fff;transform:translateY(-1px)}
.btn-ghost-x{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 22px;border-radius:var(--r-btn);border:1.5px solid var(--brand);background:#fff;color:var(--brand);font-weight:600;white-space:nowrap;transition:var(--t)}
.btn-ghost-x:hover{background:rgba(29,91,143,.07);color:var(--brand-deep)}
.link-more{font-weight:600;text-decoration:underline;text-underline-offset:3px}

/* ---------- empty state ---------- */
.empty-state{border:1px dashed var(--brand-line);background:var(--bg-alt);border-radius:var(--r-card);min-height:180px;padding:36px 24px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:12px}
.empty-state h2{padding:0;font-size:22px;margin:0}
.empty-state h2::before{display:none}
.empty-state p{color:var(--ink-2);margin:0;font-size:15px}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-alt);border-top:1px solid var(--line);padding:56px 0 24px;margin-top:8px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-desc{font-size:14px;color:var(--ink-2);line-height:1.8;max-width:34ch;margin:0}
.foot-title{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:14px}
.foot-list li{margin-bottom:10px}
.foot-list a,.foot-list span{font-size:14px;color:var(--ink-2)}
.foot-list a:hover{color:var(--brand)}
.foot-bottom{margin-top:36px;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--ink-3)}

/* ---------- responsive ---------- */
@media (min-width:992px){
  .nav-toggle{display:none !important}
}
@media (max-width:1199.98px){
  .nav-menu{gap:18px}
  .nav-search input{width:190px}
  .article-grid{grid-template-columns:minmax(0,1fr) 260px;gap:36px}
}
@media (max-width:991.98px){
  .nav-bar{flex-wrap:wrap;padding:8px 0}
  .nav-toggle{display:inline-flex}
  .nav-panel{width:100%;flex-direction:column;align-items:stretch;gap:6px;padding:6px 0 18px}
  .nav-menu{flex-direction:column;align-items:stretch;gap:0}
  .nav-menu a{padding:12px 2px;border-bottom:1px solid var(--line-2);display:block}
  .nav-menu a.active::after{display:none}
  .nav-right{flex-direction:column;align-items:stretch;gap:10px;margin-top:10px}
  .nav-search{width:100%}
  .nav-search input{width:100%}
  .btn-accent{width:100%}
  .article-grid{grid-template-columns:1fr;gap:32px}
  .article-side{position:static}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 24px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .article-wrap{padding:36px 0 56px}
}
@media (max-width:767.98px){
  .container{padding:0 20px}
  .page-hero{padding:28px 0 26px}
  .article-body{font-size:16px;line-height:1.9}
  .article-body h2{font-size:21px;margin-top:32px}
  .article-body h3{font-size:18px}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
  .related-grid{grid-template-columns:1fr}
  .pn-grid{grid-template-columns:1fr}
  .related-head{flex-direction:column;align-items:flex-start;gap:10px}
  .foot-grid{grid-template-columns:1fr}
  .cta-sec{padding:40px 0 56px}
  .site-footer{padding:44px 0 20px}
  .foot-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:575.98px){
  .article-title{font-size:24px}
  .meta-row{font-size:13px}
  .btn-primary-x,.btn-ghost-x{width:100%}
  .cta-band{gap:18px}
}

/* roulang page: category1 */
:root{
  --brand:#1D5B8F;
  --brand-dark:#14456E;
  --brand-soft:#E8F2FA;
  --brand-line:#CFE2F1;
  --accent:#E2653C;
  --accent-dark:#C9532E;
  --ink:#16222E;
  --ink-2:#4A5C6B;
  --ink-3:#8896A3;
  --bg:#FFFFFF;
  --bg-alt:#F5F8FB;
  --line:#E7EEF4;
  --divider:#F0F4F8;
  --danger:#C0392B;
  --r-card:14px;
  --r-btn:10px;
  --r-badge:999px;
  --sh-1:0 1px 2px rgba(17,42,66,.05), 0 10px 28px -14px rgba(17,42,66,.20);
  --sh-2:0 2px 5px rgba(17,42,66,.07), 0 18px 36px -16px rgba(17,42,66,.30);
  --t:180ms ease;
  --bs-primary:#1D5B8F;
  --bs-primary-rgb:29,91,143;
  --bs-body-color:#16222E;
  --bs-body-bg:#FFFFFF;
  --bs-border-color:#E7EEF4;
  --bs-border-radius:10px;
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --bs-link-color:#1D5B8F;
  --bs-link-hover-color:#14456E;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color var(--t);}
a:hover{color:var(--brand-dark);}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;text-align:left;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;}

/* ------- 通用按钮 ------- */
.btn-site{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1.5px solid transparent;
  cursor:pointer;transition:transform var(--t),background-color var(--t),color var(--t),border-color var(--t),box-shadow var(--t);
  text-decoration:none;white-space:nowrap;
}
.btn-accent{background:var(--accent);color:#fff;border-color:var(--accent);}
.btn-accent:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff;transform:translateY(-1px);}
.btn-accent:active{transform:translateY(0);}
.btn-outline-brand{background:transparent;color:var(--brand);border-color:var(--brand);}
.btn-outline-brand:hover{background:rgba(29,91,143,.06);color:var(--brand-dark);border-color:var(--brand-dark);}
.btn-xs{height:38px;padding:0 16px;font-size:14px;border-radius:var(--r-btn);}
.btn-card{height:36px;padding:0 16px;font-size:14px;}
.link-more{font-size:14px;font-weight:600;text-decoration:underline;text-underline-offset:3px;}

/* ------- 顶部导航 ------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow var(--t);
}
.site-header.is-scrolled{box-shadow:0 4px 18px -10px rgba(17,42,66,.28);}
.nav-bar{display:flex;align-items:center;gap:18px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex:none;text-decoration:none;}
.brand-mark{
  width:32px;height:32px;border-radius:9px;flex:none;
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  display:grid;place-items:center;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.2px;}
.brand-text i{font-size:12px;font-weight:500;font-style:normal;color:var(--ink-3);}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);
  background:#fff;border-radius:10px;align-items:center;justify-content:center;color:var(--ink-2);
}
.nav-toggle:hover{border-color:var(--brand-line);color:var(--brand);}
.nav-panel{flex:1;align-items:center;justify-content:space-between;gap:20px;}
.nav-left{display:flex;align-items:center;}
.nav-menu{display:flex;align-items:center;gap:2px;}
.nav-menu a{
  display:block;padding:8px 12px;font-size:15px;font-weight:500;color:var(--ink-2);
  border-bottom:2px solid transparent;border-radius:6px 6px 0 0;transition:color var(--t),border-color var(--t),background-color var(--t);
}
.nav-menu a:hover{color:var(--brand);background:var(--brand-soft);}
.nav-menu a.active{color:var(--brand);font-weight:600;border-bottom-color:var(--brand);}
.nav-right{display:flex;align-items:center;gap:14px;padding-left:20px;border-left:1px solid var(--line);}
.nav-search{
  display:flex;align-items:center;gap:8px;height:38px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--r-btn);background:var(--bg-alt);
  transition:border-color var(--t),background-color var(--t);
}
.nav-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(29,91,143,.08);}
.nav-search svg{width:16px;height:16px;color:var(--ink-3);flex:none;}
.nav-search input{
  border:0;background:transparent;outline:none;font-size:14px;width:170px;color:var(--ink);
}
.nav-search input::placeholder{color:var(--ink-3);}

/* ------- 面包屑 ------- */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);padding:20px 0 0;}
.crumb a{color:var(--ink-3);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#C3CFD8;}
.crumb .cur{color:var(--brand);font-weight:600;}

/* ------- Hero ------- */
.cat-hero{
  background:
    radial-gradient(60% 70% at 88% 12%, rgba(29,91,143,.08), transparent 70%),
    linear-gradient(180deg,#FFFFFF 0%,var(--bg-alt) 100%);
  border-bottom:1px solid var(--line);
  padding:16px 0 56px;
}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 40%;gap:48px;align-items:center;margin-top:20px;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;
  background:var(--brand-soft);color:var(--brand);border:1px solid var(--brand-line);
  border-radius:var(--r-badge);font-size:13px;font-weight:600;margin-bottom:16px;
}
.hero-tag span.dot{width:6px;height:6px;border-radius:50%;background:var(--accent);display:block;}
.cat-hero h1{
  font-size:clamp(30px,4vw,46px);line-height:1.25;font-weight:700;letter-spacing:-.5px;
  margin-bottom:16px;max-width:22ch;
}
.hero-lead{font-size:17px;line-height:1.8;color:var(--ink-2);max-width:62ch;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:36px;}
.hero-stats .stat b{display:block;font-size:28px;line-height:1.2;font-weight:700;color:var(--brand);}
.hero-stats .stat span{font-size:13px;color:var(--ink-3);}
.hero-visual{position:relative;}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-card);box-shadow:var(--sh-1);}
.hero-note{
  position:absolute;left:-16px;bottom:-18px;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:12px 16px;box-shadow:var(--sh-1);max-width:230px;
}
.hero-note b{display:block;font-size:14px;color:var(--ink);font-weight:600;}
.hero-note span{font-size:13px;color:var(--ink-3);}

/* ------- 主体两栏 ------- */
.section{padding:72px 0;}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{margin-bottom:34px;}
.sec-title{
  position:relative;padding-left:14px;
  font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:700;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand);
}
.sec-sub{font-size:17px;line-height:1.8;color:var(--ink-2);max-width:62ch;margin-top:12px;}

.cat-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:44px;align-items:start;}
.cat-aside{position:sticky;top:88px;}
.aside-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 16px;box-shadow:var(--sh-1);
}
.aside-title{font-size:13px;font-weight:700;color:var(--ink-3);letter-spacing:.4px;margin-bottom:10px;}
.aside-list{display:flex;flex-direction:column;}
.aside-list a{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:8px;
  font-size:14px;color:var(--ink-2);transition:background-color var(--t),color var(--t);
}
.aside-list a:hover{background:var(--brand-soft);color:var(--brand);}
.aside-list a .idx{
  font-size:12px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;
  min-width:20px;
}
.aside-list a.on{background:var(--brand-soft);color:var(--brand);font-weight:600;}

.group{margin-bottom:56px;scroll-margin-top:96px;}
.group:last-child{margin-bottom:0;}
.group-head{display:flex;align-items:baseline;gap:12px;margin-bottom:20px;}
.group-no{
  font-size:15px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;flex:none;
}
.group h2{font-size:clamp(20px,2vw,24px);line-height:1.35;font-weight:700;}
.group-desc{font-size:15px;color:var(--ink-2);margin:0 0 20px;max-width:66ch;}

.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.card-grid.three{grid-template-columns:repeat(3,minmax(0,1fr));}
.card{
  background:#fff;border:1px solid #EDF2F7;border-radius:var(--r-card);padding:24px;
  box-shadow:var(--sh-1);transition:transform var(--t),box-shadow var(--t),border-color var(--t);height:100%;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(29,91,143,.18);}
.card-ico{
  width:40px;height:40px;border-radius:11px;background:var(--brand-soft);
  display:grid;place-items:center;color:var(--brand);margin-bottom:14px;
}
.card-ico svg{width:22px;height:22px;stroke-width:1.6;}
.card h3{font-size:18px;line-height:1.4;font-weight:600;margin-bottom:8px;}
.card p{font-size:15px;line-height:1.8;color:var(--ink-2);margin:0 0 14px;}
.card .link-more{color:var(--brand);}

/* ------- 清单 ------- */
.check-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:10px 24px;box-shadow:var(--sh-1);
}
.check-item{
  display:flex;align-items:flex-start;gap:14px;padding:18px 0;border-bottom:1px solid var(--divider);
}
.check-item:last-child{border-bottom:0;}
.check-ico{
  width:26px;height:26px;border-radius:50%;background:var(--brand-soft);color:var(--brand);
  display:grid;place-items:center;flex:none;margin-top:3px;
}
.check-ico svg{width:15px;height:15px;stroke-width:2;}
.check-body h3{font-size:16px;font-weight:600;margin-bottom:2px;}
.check-body p{font-size:14px;color:var(--ink-2);margin:0;}
.check-arrow{margin-left:auto;color:var(--ink-3);flex:none;padding-top:6px;}
.check-item:hover .check-arrow{color:var(--brand);}

/* ------- 图文块 ------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) 44%;gap:44px;align-items:center;}
.split.rev{grid-template-columns:44% minmax(0,1fr);}
.split-img img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-card);box-shadow:var(--sh-1);}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.badge-soft{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-badge);
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:500;border:1px solid var(--brand-line);
}
.badge-accent{background:rgba(226,101,60,.10);color:var(--accent-dark);border-color:rgba(226,101,60,.25);}

/* ------- FAQ ------- */
.faq-wrap{max-width:900px;}
.accordion-item{
  background:#fff;border:1px solid var(--line)!important;border-radius:12px!important;
  margin-bottom:12px;overflow:hidden;
}
.accordion-button{
  background:#fff;color:var(--ink);font-size:16px;font-weight:600;line-height:1.6;
  padding:18px 22px;border-radius:12px!important;box-shadow:none!important;
}
.accordion-button:not(.collapsed){color:var(--brand);background:#fff;}
.accordion-button::after{
  width:16px;height:16px;background-size:16px;filter:none;
}
.accordion-button:not(.collapsed)::after{filter:none;}
.accordion-button:focus{box-shadow:0 0 0 3px rgba(29,91,143,.10)!important;}
.accordion-body{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--ink-2);}
.accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 2px 2px 0;background:var(--accent);
}
.accordion-button{position:relative;padding-left:22px;}

/* ------- CTA 带 ------- */
.cta-band{
  background:var(--brand-soft);border:1px solid var(--brand-line);border-radius:18px;
  padding:34px 36px;display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band h2{font-size:clamp(20px,2.1vw,26px);font-weight:700;line-height:1.35;margin-bottom:8px;padding:0;}
.cta-band h2::before{display:none;}
.cta-band p{font-size:15px;color:var(--ink-2);margin:0;max-width:58ch;}
.cta-actions{display:flex;gap:12px;flex:none;}

/* ------- 页脚 ------- */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:60px 0 0;margin-top:8px;}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.foot-desc{font-size:14px;line-height:1.85;color:var(--ink-2);max-width:34ch;margin:0;}
.foot-title{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:14px;}
.foot-list{display:flex;flex-direction:column;gap:10px;}
.foot-list a,.foot-list span{font-size:14px;color:var(--ink-2);}
.foot-list a:hover{color:var(--brand);}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--divider);margin-top:44px;padding:20px 0 26px;
  font-size:13px;color:var(--ink-3);
}

/* ------- 响应式 ------- */
@media (max-width:1199.98px){
  .nav-search input{width:130px;}
  .hero-grid{gap:34px;}
  .cat-layout{grid-template-columns:210px minmax(0,1fr);gap:32px;}
}
@media (max-width:991.98px){
  .nav-toggle{display:inline-flex;}
  .nav-panel{
    position:absolute;left:0;right:0;top:64px;background:#fff;
    border-bottom:1px solid var(--line);box-shadow:0 18px 30px -20px rgba(17,42,66,.35);
    padding:16px 20px 22px;flex-direction:column;align-items:stretch;gap:16px;
  }
  .nav-panel.show{display:flex!important;}
  .nav-left{width:100%;}
  .nav-menu{flex-direction:column;align-items:stretch;gap:4px;width:100%;}
  .nav-menu a{padding:12px 10px;border-bottom:1px solid var(--divider);border-radius:8px;}
  .nav-menu a.active{border-bottom-color:var(--divider);background:var(--brand-soft);}
  .nav-right{flex-direction:column;align-items:stretch;padding-left:0;border-left:0;gap:12px;}
  .nav-right .btn-accent{width:100%;order:-1;}
  .nav-search{width:100%;}
  .nav-search input{width:100%;}
  .nav-search svg{flex:none;}

  .hero-grid{grid-template-columns:1fr;gap:30px;}
  .cat-hero{padding-bottom:44px;}
  .hero-visual{order:2;}
  .hero-note{position:static;margin-top:14px;max-width:none;}
  .section{padding:56px 0;}

  .cat-layout{grid-template-columns:1fr;gap:28px;}
  .cat-aside{
    position:sticky;top:64px;z-index:20;background:#fff;border-bottom:1px solid var(--line);
    padding:10px 0;margin:0 -24px;padding-left:24px;padding-right:24px;
  }
  .aside-card{border:0;box-shadow:none;padding:0;background:transparent;}
  .aside-title{display:none;}
  .aside-list{flex-direction:row;overflow-x:auto;gap:8px;padding-bottom:4px;-webkit-overflow-scrolling:touch;}
  .aside-list li{flex:none;}
  .aside-list a{
    border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;white-space:nowrap;
  }
  .aside-list a.on{background:var(--brand-soft);border-color:var(--brand-line);}
  .aside-list a .idx{display:none;}

  .card-grid,.card-grid.three{grid-template-columns:repeat(2,minmax(0,1fr));}
  .split,.split.rev{grid-template-columns:1fr;gap:26px;}
  .split.rev .split-img{order:-1;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 24px;}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
}
@media (max-width:767.98px){
  .container{padding:0 20px;}
  .card-grid,.card-grid.three{grid-template-columns:1fr;}
  .hero-stats{gap:24px;}
  .hero-stats .stat b{font-size:24px;}
  .hero-actions .btn-site{width:100%;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn-site{width:100%;}
  .group{margin-bottom:44px;}
}
@media (max-width:575.98px){
  .hero-tag{font-size:12px;}
  .foot-grid{grid-template-columns:1fr;gap:24px;}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:6px;}
  .check-panel{padding:6px 16px;}
  .card{padding:20px;}
  .cat-aside{margin:0 -20px;padding-left:20px;padding-right:20px;}
}

/* roulang page: category2 */
:root{
  --brand:#1D5B8F;
  --brand-deep:#14456E;
  --brand-soft:#E8F2FA;
  --brand-line:#CFE2F1;
  --accent:#E2653C;
  --accent-deep:#C9522C;
  --ink:#16222E;
  --ink-2:#4A5C6B;
  --ink-3:#8896A3;
  --paper:#FFFFFF;
  --paper-alt:#F5F8FB;
  --line:#E7EEF4;
  --line-soft:#F0F4F8;
  --r-card:14px;
  --r-btn:10px;
  --r-cta:18px;
  --shadow-sm:0 1px 2px rgba(17,42,66,.05),0 10px 28px -14px rgba(17,42,66,.20);
  --shadow-hover:0 2px 4px rgba(17,42,66,.07),0 18px 34px -16px rgba(17,42,66,.26);
  --bs-primary:#1D5B8F;
  --bs-primary-rgb:29,91,143;
  --bs-body-color:#16222E;
  --bs-body-bg:#FFFFFF;
  --bs-border-radius:14px;
  --bs-border-color:#E7EEF4;
  --bs-link-color:#1D5B8F;
  --bs-link-hover-color:#14456E;
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --bs-body-font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease;}
a:hover{color:var(--brand-deep);}
button,input,select,textarea{font:inherit;color:inherit;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.2px;}
p{margin:0;}
.num{font-variant-numeric:tabular-nums;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.container{width:100%;max-width:1200px;padding-inline:24px;margin-inline:auto;}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 20px -14px rgba(17,42,66,.38);}
.nav-bar{height:64px;display:flex;align-items:center;gap:18px;position:relative;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:9px;background:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text b{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.3px;}
.brand-text i{font-size:12px;font-style:normal;font-weight:500;color:var(--ink-3);letter-spacing:.6px;}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;
  align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);border-radius:10px;color:var(--brand-deep);
}
.nav-left{flex:1 1 auto;min-width:0;}
.nav-menu{display:flex;align-items:center;gap:26px;}
.nav-menu a{
  display:inline-block;padding:20px 0;font-size:15px;color:var(--ink-2);
  border-bottom:2px solid transparent;line-height:1.4;
}
.nav-menu a:hover{color:var(--brand);}
.nav-menu a.active{color:var(--brand);font-weight:600;border-bottom-color:var(--brand);}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-search{
  display:flex;align-items:center;gap:8px;height:38px;width:236px;
  padding:0 12px;background:var(--paper-alt);
  border:1px solid var(--line);border-radius:10px;
  transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.nav-search svg{width:16px;height:16px;flex:0 0 auto;color:var(--ink-3);}
.nav-search input{
  border:0;background:transparent;outline:none;width:100%;
  font-size:14px;line-height:1;
}
.nav-search input::placeholder{color:var(--ink-3);}
.nav-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(29,91,143,.08);}
.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 20px;border:0;border-radius:var(--r-btn);
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;
  transition:background-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-accent:hover{background:var(--accent-deep);color:#fff;transform:translateY(-1px);}
.btn-xs{height:38px;padding:0 16px;font-size:14px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 20px;border:1.5px solid var(--brand);border-radius:var(--r-btn);
  background:transparent;color:var(--brand);font-size:15px;font-weight:600;
  transition:background-color .18s ease,color .18s ease,transform .18s ease;
}
.btn-ghost:hover{background:rgba(29,91,143,.06);color:var(--brand-deep);transform:translateY(-1px);}
.btn-ghost.on-dark{border-color:#fff;color:#fff;}
.btn-ghost.on-dark:hover{background:rgba(255,255,255,.14);color:#fff;}
.link-arrow{font-size:15px;font-weight:600;border-bottom:1px solid rgba(29,91,143,.35);padding-bottom:2px;}

/* ============ banner ============ */
.banner{
  position:relative;display:flex;align-items:center;
  aspect-ratio:16/5;min-height:250px;
  background-image:linear-gradient(90deg,rgba(15,45,74,.86) 0%,rgba(20,69,110,.68) 55%,rgba(29,91,143,.46) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.banner-inner{padding-block:40px;max-width:820px;}
.crumb{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:rgba(255,255,255,.78);margin-bottom:16px;}
.crumb a{color:rgba(255,255,255,.86);}
.crumb a:hover{color:#fff;}
.crumb span{color:rgba(255,255,255,.55);}
.banner h1{
  font-size:clamp(28px,3.4vw,42px);line-height:1.25;color:#fff;letter-spacing:-.5px;
  max-width:22ch;
}
.banner-sub{
  margin-top:14px;font-size:17px;line-height:1.8;color:rgba(255,255,255,.9);max-width:56ch;
}
.banner-meta{
  margin-top:20px;display:flex;flex-wrap:wrap;gap:10px;
}
.banner-meta span{
  font-size:13px;color:#fff;background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.28);border-radius:999px;padding:5px 14px;
  backdrop-filter:none;
}

/* ============ sections ============ */
.section{padding:72px 0;}
.section-alt{background:var(--paper-alt);}
.sec-head{max-width:720px;margin-bottom:36px;}
.sec-title{
  position:relative;padding-left:16px;
  font-size:clamp(22px,2.4vw,30px);line-height:1.3;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:6px;width:4px;height:22px;border-radius:2px;background:var(--brand);
}
.sec-lead{margin-top:14px;font-size:17px;line-height:1.8;color:var(--ink-2);max-width:62ch;}
.sec-head-inline{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;max-width:none;}

/* split */
.split{display:grid;grid-template-columns:55% 45%;gap:48px;align-items:center;}
.split + .split{margin-top:64px;}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:14px;box-shadow:var(--shadow-sm);}
.split.rev .split-media{order:-1;}
.split-body h3{font-size:clamp(19px,2vw,22px);line-height:1.4;margin-bottom:14px;}
.split-body p{color:var(--ink-2);line-height:1.9;margin-bottom:14px;}
.split-body p:last-of-type{margin-bottom:0;}
.tick-list{margin-top:18px;border-top:1px solid var(--line-soft);}
.tick-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 0;border-bottom:1px solid var(--line-soft);
}
.tick-list svg{width:20px;height:20px;flex:0 0 auto;margin-top:5px;color:var(--brand);}
.tick-list b{display:block;font-size:15.5px;font-weight:600;color:var(--ink);}
.tick-list em{font-style:normal;font-size:14px;color:var(--ink-3);}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.badge-pill{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;color:var(--brand-deep);background:var(--brand-soft);
  border:1px solid var(--brand-line);border-radius:999px;padding:5px 14px;
}
.badge-pill.accent{color:#fff;background:var(--accent);border-color:var(--accent);}

/* compare table */
.table-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card);
  background:#fff;box-shadow:var(--shadow-sm);
}
table.compare{width:100%;border-collapse:collapse;min-width:760px;}
table.compare th,table.compare td{padding:15px 18px;text-align:left;font-size:15px;vertical-align:top;}
table.compare thead th{
  background:var(--brand-soft);color:var(--brand-deep);font-weight:600;
  border-bottom:1px solid var(--brand-line);white-space:nowrap;
}
table.compare tbody td{border-bottom:1px solid var(--line-soft);color:var(--ink-2);}
table.compare tbody tr:nth-child(even){background:#FAFCFE;}
table.compare tbody tr:last-child td{border-bottom:0;}
table.compare td:first-child{color:var(--ink);font-weight:600;}
.table-note{margin-top:14px;font-size:13px;color:var(--ink-3);}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.step-card{
  background:#fff;border:1px solid #EDF2F7;border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(29,91,143,.18);}
.step-card .num{font-size:28px;font-weight:700;color:var(--brand);line-height:1;display:block;}
.step-card h3{font-size:18px;line-height:1.4;margin:14px 0 10px;}
.step-card p{font-size:15px;color:var(--ink-2);line-height:1.85;}

/* faq */
.faq-wrap{max-width:880px;}
.accordion-item{
  border:1px solid var(--line);border-radius:12px;background:#fff;
  margin-bottom:12px;overflow:hidden;
}
.accordion-item:last-child{margin-bottom:0;}
.accordion-button{
  width:100%;padding:18px 20px;background:#fff;border:0;
  font-size:16px;font-weight:600;color:var(--ink);text-align:left;
  box-shadow:none;
}
.accordion-button:not(.collapsed){color:var(--brand);box-shadow:none;border-left:3px solid var(--accent);}
.accordion-button:focus{box-shadow:none;border-color:var(--brand-line);}
.accordion-button::after{filter:grayscale(1);}
.accordion-body{padding:0 20px 20px;font-size:15.5px;line-height:1.9;color:var(--ink-2);}

/* cta band */
.cta-band{
  background:var(--brand-soft);border:1px solid var(--brand-line);
  border-radius:var(--r-cta);padding:40px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);line-height:1.35;max-width:26ch;}
.cta-band p{margin-top:10px;font-size:15.5px;color:var(--ink-2);max-width:52ch;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ footer ============ */
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:0;}
.foot-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;
  padding:56px 0 32px;
}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.foot-desc{font-size:14px;line-height:1.85;color:var(--ink-2);max-width:34ch;}
.foot-title{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:14px;}
.foot-list li{margin-bottom:10px;font-size:14px;color:var(--ink-2);}
.foot-list a{color:var(--ink-2);}
.foot-list a:hover{color:var(--brand);}
.foot-bottom{
  border-top:1px solid var(--line-soft);padding:18px 0 28px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-3);
}

/* ============ responsive ============ */
@media (min-width:992px){
  .nav-panel{display:flex;flex:1 1 auto;align-items:center;justify-content:space-between;gap:24px;}
  .nav-left{border-right:1px solid var(--line);padding-right:24px;}
}
@media (max-width:1199.98px){
  .nav-search{width:200px;}
  .nav-menu{gap:20px;}
}
@media (max-width:991.98px){
  .container{padding-inline:20px;}
  .nav-toggle{display:inline-flex;}
  .nav-bar{gap:12px;}
  .nav-panel{
    position:fixed;left:0;right:0;top:64px;
    background:#fff;border-bottom:1px solid var(--line);
    padding:16px 20px 24px;box-shadow:var(--shadow-sm);
    max-height:calc(100vh - 64px);overflow-y:auto;
  }
  .nav-menu{flex-direction:column;align-items:stretch;gap:0;}
  .nav-menu a{padding:14px 0;border-bottom:1px solid var(--line-soft);font-size:16px;}
  .nav-menu a.active{border-bottom:1px solid var(--line-soft);color:var(--brand);}
  .nav-right{flex-direction:column;align-items:stretch;gap:12px;margin-top:16px;}
  .nav-search{width:100%;height:44px;}
  .btn-xs{width:100%;height:44px;}
  .section{padding:64px 0;}
  .split{grid-template-columns:1fr;gap:28px;}
  .split.rev .split-media{order:0;}
  .split + .split{margin-top:48px;}
  .steps{grid-template-columns:1fr;gap:16px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;padding:44px 0 24px;}
  .banner{aspect-ratio:auto;min-height:300px;background-position:center right;}
  .banner-sub{font-size:16px;}
}
@media (max-width:767.98px){
  .section{padding:48px 0;}
  .sec-head{margin-bottom:26px;}
  .banner{min-height:320px;}
  .banner-inner{padding-block:32px;}
  .cta-band{padding:28px 24px;flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn-accent,.cta-actions .btn-ghost{flex:1 1 160px;}
  .foot-grid{grid-template-columns:1fr;gap:24px;}
  .foot-bottom{flex-direction:column;gap:8px;}
  .step-card{padding:22px;}
}
@media (max-width:575.98px){
  .brand-text b{font-size:17px;}
  .banner h1{font-size:26px;}
  .table-wrap{border-radius:12px;}
  .accordion-button{font-size:15px;padding:16px;}
}

/* roulang page: category3 */
:root{
  --brand:#1D5B8F;
  --brand-deep:#14456E;
  --brand-soft:#E8F2FA;
  --brand-line:#CFE2F1;
  --accent:#E2653C;
  --accent-deep:#C2542F;
  --ink:#16222E;
  --ink-2:#4A5C6B;
  --ink-3:#8896A3;
  --bg:#FFFFFF;
  --bg-alt:#F5F8FB;
  --border:#E7EEF4;
  --divider:#F0F4F8;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-badge:999px;
  --r-cta:18px;
  --sh-1:0 1px 2px rgba(17,42,66,.05), 0 10px 28px -14px rgba(17,42,66,.20);
  --sh-2:0 2px 4px rgba(17,42,66,.06), 0 18px 38px -16px rgba(17,42,66,.28);
  --t:180ms ease;
  --bs-primary:#1D5B8F;
  --bs-body-color:#16222E;
  --bs-border-radius:14px;
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --bs-body-font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color var(--t),background var(--t),border-color var(--t);}
a:hover{color:var(--brand-deep);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

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

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow var(--t);
}
.site-header.scrolled{box-shadow:0 6px 20px -12px rgba(17,42,66,.30);}
.nav-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:64px;
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand);
  display:grid;place-items:center;flex-shrink:0;
  box-shadow:0 6px 14px -8px rgba(29,91,143,.75);
}
.brand-text{display:flex;flex-direction:column;line-height:1.18;}
.brand-text b{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.3px;}
.brand-text i{font-size:12px;font-weight:500;font-style:normal;color:var(--ink-3);letter-spacing:.06em;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--border);background:#fff;
  border-radius:var(--r-btn);color:var(--ink);cursor:pointer;
}
.nav-panel{display:flex;align-items:center;justify-content:space-between;flex:1;gap:24px;}
.nav-left{display:flex;align-items:center;}
.nav-menu{display:flex;align-items:center;list-style:none;gap:2px;}
.nav-menu a{
  position:relative;display:block;padding:8px 12px;font-size:15px;
  color:var(--ink-2);border-radius:8px;text-decoration:none;white-space:nowrap;
}
.nav-menu a:hover{color:var(--brand);background:var(--brand-soft);}
.nav-menu a.active{color:var(--brand);font-weight:600;}
.nav-menu a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-3px;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-search{position:relative;display:flex;align-items:center;}
.nav-search svg{position:absolute;left:11px;width:16px;height:16px;color:var(--ink-3);pointer-events:none;}
.nav-search input{
  height:38px;width:215px;padding:0 12px 0 33px;font-size:14px;
  border:1px solid var(--border);border-radius:var(--r-input);
  background:#fff;color:var(--ink);transition:border-color var(--t),box-shadow var(--t);
}
.nav-search input::placeholder{color:var(--ink-3);}
.nav-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,91,143,.08);}

/* ---------- buttons ---------- */
.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border:none;border-radius:var(--r-btn);
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;
  cursor:pointer;text-decoration:none;white-space:nowrap;
  transition:background var(--t),transform var(--t),box-shadow var(--t);
}
.btn-accent:hover{background:var(--accent-deep);color:#fff;transform:translateY(-1px);box-shadow:0 10px 20px -12px rgba(226,101,60,.85);}
.btn-xs{height:38px;padding:0 16px;font-size:14px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border:1.5px solid var(--brand);border-radius:var(--r-btn);
  background:transparent;color:var(--brand);font-size:15px;font-weight:600;
  cursor:pointer;text-decoration:none;white-space:nowrap;
  transition:background var(--t),transform var(--t);
}
.btn-ghost:hover{background:rgba(29,91,143,.07);color:var(--brand-deep);transform:translateY(-1px);}

/* ---------- hero ---------- */
.cat-hero{
  padding:clamp(64px,7vw,104px) 0 clamp(48px,5vw,72px);
  background:
    radial-gradient(880px 340px at 90% 6%, rgba(29,91,143,.09), transparent 68%),
    linear-gradient(180deg,#FFFFFF 0%, #F5F8FB 100%);
  border-bottom:1px solid var(--border);
}
.crumb{font-size:13px;color:var(--ink-3);margin-bottom:16px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;}
.crumb a{color:var(--ink-3);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#C6D2DC;}
.crumb .cur{color:var(--brand);font-weight:600;}
.cat-hero h1{
  font-size:clamp(30px,4vw,46px);
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.5px;
  max-width:16em;
}
.hero-lead{
  margin-top:18px;
  font-size:17px;
  line-height:1.8;
  color:var(--ink-2);
  max-width:62ch;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:28px 56px;
  margin-top:44px;padding-top:28px;border-top:1px solid var(--border);
  list-style:none;
}
.hero-stats li{display:flex;flex-direction:column;gap:4px;}
.hero-stats .num{font-size:28px;font-weight:700;color:var(--brand);line-height:1.1;letter-spacing:-.5px;}
.hero-stats .lb{font-size:13px;color:var(--ink-3);}

/* ---------- sections ---------- */
.sec{padding:72px 0;}
.sec-alt{background:var(--bg-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.sec-title{
  position:relative;
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.3;
  font-weight:700;
  padding-left:16px;
  margin-bottom:16px;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:.28em;width:4px;height:22px;
  background:var(--brand);border-radius:2px;
}
.sec-lead{font-size:17px;line-height:1.8;color:var(--ink-2);max-width:62ch;margin-bottom:36px;}

/* ---------- steps ---------- */
.step-list{list-style:none;counter-reset:s;}
.step-list li{
  display:grid;grid-template-columns:96px 1fr;gap:20px;
  padding:28px 0;border-bottom:1px solid var(--divider);
}
.step-list li:first-child{padding-top:4px;}
.step-list li:last-child{border-bottom:none;}
.step-no{
  font-size:28px;font-weight:700;color:var(--brand);
  line-height:1.15;letter-spacing:-.5px;font-variant-numeric:tabular-nums;
}
.step-list h3{font-size:19px;line-height:1.4;font-weight:600;margin-bottom:8px;}
.step-list p{font-size:16px;line-height:1.85;color:var(--ink-2);max-width:70ch;}

/* ---------- media row ---------- */
.media-row{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:44px;align-items:center;}
.media-fig{
  margin:0;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--border);box-shadow:var(--sh-1);background:#fff;
}
.media-fig img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.media-fig figcaption{font-size:13px;color:var(--ink-3);padding:12px 16px;border-top:1px solid var(--divider);}
.media-body h2{margin-bottom:14px;}
.media-body > p{font-size:16px;line-height:1.85;color:var(--ink-2);margin-bottom:22px;max-width:58ch;}
.tick-list{list-style:none;display:grid;gap:14px;}
.tick-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--ink-2);line-height:1.7;}
.tick-list svg{flex-shrink:0;width:20px;height:20px;margin-top:4px;color:var(--brand);}

/* ---------- check grid ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.check-item{
  display:flex;gap:12px;align-items:flex-start;
  padding:18px 20px;background:#fff;border:1px solid var(--border);
  border-radius:var(--r-card);transition:box-shadow var(--t),border-color var(--t),transform var(--t);
}
.check-item:hover{border-color:rgba(29,91,143,.22);box-shadow:var(--sh-1);transform:translateY(-2px);}
.check-item svg{flex-shrink:0;width:22px;height:22px;margin-top:2px;color:var(--brand);}
.check-item span{font-size:15px;line-height:1.7;color:var(--ink-2);}
.check-item b{display:block;font-size:16px;font-weight:600;color:var(--ink);margin-bottom:2px;}

/* ---------- faq ---------- */
.accordion-item{
  border:1px solid var(--border)!important;
  border-radius:12px!important;
  margin-bottom:12px;
  overflow:hidden;
  background:#fff;
  box-shadow:none;
}
.accordion-button{
  position:relative;
  font-size:17px;font-weight:600;color:var(--ink);
  background:#fff;padding:18px 52px 18px 22px;
  box-shadow:none!important;
  border-radius:12px!important;
}
.accordion-button:not(.collapsed){color:var(--brand);background:#fff;}
.accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:var(--accent);border-radius:0 3px 3px 0;
}
.accordion-button::after{
  width:16px;height:16px;background-size:16px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%231D5B8F' d='M8 11.2 1.6 4.8l1.1-1.1L8 9l5.3-5.3 1.1 1.1z'/%3E%3C/svg%3E");
}
.accordion-button:focus{box-shadow:0 0 0 2px rgba(29,91,143,.22)!important;}
.accordion-body{
  padding:0 22px 22px;font-size:16px;line-height:1.85;color:var(--ink-2);
}
.accordion-body p{max-width:70ch;}

/* ---------- cta band ---------- */
.cta-wrap{padding:64px 0 72px;}
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  background:var(--brand-soft);
  border:1px solid var(--brand-line);
  border-radius:var(--r-cta);
  padding:34px 38px;
}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);line-height:1.35;font-weight:700;margin-bottom:8px;}
.cta-band p{font-size:15px;line-height:1.8;color:var(--ink-2);max-width:56ch;}
.cta-band .btn-accent{flex-shrink:0;}

/* ---------- footer ---------- */
.site-footer{background:#fff;border-top:1px solid var(--border);padding:56px 0 24px;}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.foot-desc{font-size:14px;line-height:1.8;color:var(--ink-2);max-width:34ch;}
.foot-title{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:14px;}
.foot-list{list-style:none;display:grid;gap:10px;font-size:14px;color:var(--ink-2);}
.foot-list a{color:var(--ink-2);text-decoration:none;}
.foot-list a:hover{color:var(--brand);}
.foot-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
  border-top:1px solid var(--divider);margin-top:36px;padding-top:18px;
  font-size:13px;color:var(--ink-3);
}

/* ---------- responsive ---------- */
@media (min-width:1200px){
  .nav-panel{gap:32px;}
}
@media (max-width:1199.98px){
  .nav-search input{width:180px;}
}
@media (max-width:991.98px){
  .nav-toggle{display:inline-flex;}
  .nav-panel{
    position:absolute;left:0;right:0;top:64px;
    display:block;flex:none;
    background:#fff;border-top:1px solid var(--border);
    box-shadow:0 22px 34px -22px rgba(17,42,66,.35);
    padding:16px 20px 22px;
  }
  .nav-panel.show{display:block;}
  .nav-left{display:block;}
  .nav-menu{flex-direction:column;align-items:stretch;gap:2px;}
  .nav-menu a{padding:12px 10px;font-size:16px;}
  .nav-menu a.active{background:var(--brand-soft);}
  .nav-menu a.active::after{display:none;}
  .nav-right{flex-direction:column;align-items:stretch;gap:12px;margin-top:14px;}
  .nav-search input{width:100%;height:44px;}
  .nav-right .btn-accent{width:100%;height:44px;}
  .media-row{grid-template-columns:1fr;gap:28px;}
  .sec{padding:64px 0;}
}
@media (max-width:767.98px){
  .check-grid{grid-template-columns:1fr;}
  .step-list li{grid-template-columns:60px 1fr;gap:14px;padding:22px 0;}
  .step-no{font-size:22px;}
  .step-list h3{font-size:18px;}
  .hero-stats{gap:20px 36px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 24px;}
  .cta-band .btn-accent{width:100%;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .sec{padding:52px 0;}
}
@media (max-width:575.98px){
  .container{padding-left:20px;padding-right:20px;}
  .brand-text b{font-size:16px;}
  .brand-text i{font-size:11px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn-accent,.hero-actions .btn-ghost{width:100%;}
  .foot-grid{grid-template-columns:1fr;}
  .hero-stats .num{font-size:24px;}
  .sec{padding:48px 0;}
}