/* roulang page: index */
:root{
  --brand-900:#0A3F73;
  --brand-700:#0E5AA7;
  --brand-500:#1B7BD4;
  --brand-100:#E4EEF9;
  --track-600:#14A0A0;
  --track-100:#E2F5F4;
  --vitality:#FF7A29;
  --ink-900:#16202B;
  --ink-600:#5A6B7B;
  --ink-400:#8A99A8;
  --line:#E3E9F0;
  --page:#F5F7FA;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 1px 2px rgba(16,32,48,.04), 0 8px 24px rgba(16,32,48,.06);
  --shadow-2:0 12px 32px rgba(16,32,48,.10);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:PingFang SC,Microsoft YaHei,Hiragino Sans GB,Noto Sans SC,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--ink-900);
  background:var(--page);
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:80px 0;border-top:1px solid var(--line)}
.section--plain{border-top:0}
@media (max-width:1024px){.section{padding:56px 0}}
@media (max-width:640px){.container{padding:0 16px}.section{padding:40px 0}}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-stuck{box-shadow:0 6px 20px rgba(16,32,48,.08)}
.brand-row{height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--brand-900);letter-spacing:.01em;white-space:nowrap}
.logo-mark{width:34px;height:34px;border-radius:10px;background:var(--brand-700);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:700;flex:0 0 auto}
.brand-right{display:flex;align-items:center;gap:16px}
.channel-bar{background:var(--brand-100);border-top:1px solid var(--line)}
.channel-inner{display:flex;align-items:center;height:52px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.channel-inner::-webkit-scrollbar{display:none}
.channel-link{position:relative;display:inline-flex;align-items:center;height:52px;padding:0 18px;font-size:15px;color:#31465A;white-space:nowrap;border-bottom:3px solid transparent;transition:color .2s ease,border-color .2s ease}
.channel-link:first-child{padding-left:0}
.channel-link:hover{color:var(--brand-700)}
.channel-link.is-active{color:var(--brand-700);font-weight:600;border-bottom-color:var(--brand-700)}
.nav-toggle{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;align-items:center;justify-content:center;cursor:pointer;flex:0 0 auto}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--brand-900);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:'';position:absolute;left:0;width:18px;height:2px;background:var(--brand-900);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-nav{display:none;border-top:1px solid var(--line);background:#fff;padding:8px 0 16px}
.mobile-nav.is-open{display:block}
.mobile-nav a{display:block;padding:12px 24px;font-size:15px;color:var(--ink-900);border-bottom:1px solid var(--line)}
.mobile-nav a:last-child{border-bottom:0}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .brand-right .text-link{display:none}
  .logo{font-size:15.5px}
}
@media (max-width:520px){
  .logo-text{max-width:170px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background-color .2s ease,box-shadow .2s ease,transform .2s ease,color .2s ease;white-space:nowrap}
.btn-primary{background:var(--brand-700);color:#fff}
.btn-primary:hover{background:var(--brand-900);box-shadow:var(--shadow-2);transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--brand-700);border-color:#BFD6EC}
.btn-ghost:hover{background:var(--brand-100);transform:translateY(-2px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn:focus-visible{outline:3px solid rgba(14,90,167,.25);outline-offset:2px}
.btn[disabled]{opacity:.5;pointer-events:none}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand-500);font-weight:600;font-size:14px;transition:transform .2s ease,color .2s ease}
.text-link::after{content:'→';font-size:14px;transition:transform .2s ease}
.text-link:hover{color:var(--brand-700);transform:translateX(2px)}

/* ---------- Chips / badges ---------- */
.chip{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:13px;line-height:1.7;background:var(--brand-100);color:var(--brand-700);font-weight:500}
.chip-track{background:var(--track-100);color:#0F7C7C}
.chip-accent{background:#FFEFE3;color:#C4551A}
.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;background:var(--vitality);color:#fff;font-size:12px;font-weight:600}

/* ---------- Cards ---------- */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease;overflow:hidden}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.card-body{padding:22px}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ratio{position:relative;overflow:hidden;border-radius:var(--radius-img)}
.ratio-16-10{aspect-ratio:16/10}
.ratio-16-9{aspect-ratio:16/9}
.ratio-4-3{aspect-ratio:4/3}
.ratio img{width:100%;height:100%;object-fit:cover}

/* ---------- Hero ---------- */
.hero{padding:72px 0 80px;background:linear-gradient(180deg,#FFFFFF 0%,#F7FAFD 100%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(28px,4vw,44px);line-height:1.25;font-weight:700;letter-spacing:.01em;color:var(--ink-900)}
.hero-sub{margin-top:16px;font-size:17px;line-height:1.8;color:var(--ink-600);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{display:flex;flex-wrap:wrap;gap:40px;margin-top:36px;padding-top:26px;border-top:1px solid var(--line)}
.stat strong{display:block;font-size:26px;font-weight:700;color:var(--brand-700);line-height:1.2}
.stat span{display:block;margin-top:4px;font-size:14px;color:var(--ink-600)}
.hero-media{position:relative;border-radius:18px;overflow:hidden;box-shadow:var(--shadow-1);aspect-ratio:16/10}
.hero-media img{width:100%;height:100%;object-fit:cover}
@media (max-width:1024px){.hero{padding:48px 0 56px}.hero-grid{grid-template-columns:1fr;gap:36px}.hero-sub{max-width:none}}
@media (max-width:640px){.hero-stats{gap:26px}}

/* ---------- Section head ---------- */
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.section-title{font-size:clamp(22px,2.6vw,32px);font-weight:600;letter-spacing:.01em;color:var(--ink-900)}
.section-sub{margin-top:10px;font-size:15.5px;color:var(--ink-600);max-width:680px}

/* ---------- Bento ---------- */
.bento{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.bento-main{grid-column:span 2;grid-row:span 2;display:flex;flex-direction:column}
.bento-main .ratio{flex:1 1 auto;border-radius:0;aspect-ratio:auto;min-height:220px}
.bento-main .ratio img{height:100%}
.bento-item{display:flex;flex-direction:column;gap:8px}
.icon-line{width:38px;height:38px;border-radius:10px;border:1.5px solid var(--brand-500);display:grid;place-items:center;color:var(--brand-700);font-size:15px;font-weight:700}
@media (max-width:900px){
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento-main{grid-column:span 2;grid-row:auto}
  .bento-main .ratio{aspect-ratio:16/9;min-height:0}
}
@media (max-width:600px){
  .bento{grid-template-columns:1fr}
  .bento-main{grid-column:span 1}
}

/* ---------- Zigzag ---------- */
.zigzag{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:32px 0}
.zigzag + .zigzag{border-top:1px solid var(--line)}
.zigzag-media{order:2}
.zigzag-body{order:1}
.zigzag.reverse .zigzag-media{order:1}
.zigzag.reverse .zigzag-body{order:2}
.zigzag h3{font-size:20px;font-weight:600;margin-top:14px;color:var(--ink-900)}
.zigzag ul{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.zigzag li{position:relative;padding-left:20px;font-size:15.5px;color:var(--ink-600)}
.zigzag li::before{content:'';position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:2px;background:var(--track-600)}
.zigzag .text-link{margin-top:18px}
@media (max-width:900px){
  .zigzag{grid-template-columns:1fr;gap:22px;padding:26px 0}
  .zigzag-media,.zigzag.reverse .zigzag-media{order:1}
  .zigzag-body,.zigzag.reverse .zigzag-body{order:2}
}

/* ---------- Case ---------- */
.case-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:24px}
.case-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-400);margin-top:14px}
.case-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--ink-400)}
@media (max-width:1024px){
  .case-grid{grid-template-columns:1fr 1fr}
  .case-grid > .card:first-child{grid-column:span 2}
}
@media (max-width:640px){
  .case-grid{grid-template-columns:1fr}
  .case-grid > .card:first-child{grid-column:span 1}
}

/* ---------- News (CMS) ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-grid > .card:first-child{grid-column:span 2;grid-row:span 2}
.news-lead{display:flex;flex-direction:column}
.news-lead .ratio{aspect-ratio:16/9;border-radius:0}
.news-empty{grid-column:1/-1;background:#F0F3F7;border:1px dashed #CBD5E1;border-radius:var(--radius-card);padding:42px 24px;text-align:center;color:var(--ink-600);font-size:15px}
.empty-icon{width:42px;height:42px;border-radius:12px;border:1.5px solid var(--ink-400);margin:0 auto 14px;position:relative}
.empty-icon::before,.empty-icon::after{content:'';position:absolute;background:var(--ink-400);border-radius:2px}
.empty-icon::before{left:12px;right:12px;top:20px;height:1.5px}
.empty-icon::after{top:12px;bottom:12px;left:20px;width:1.5px}
@media (max-width:900px){
  .news-grid{grid-template-columns:1fr}
  .news-grid > .card:first-child{grid-column:span 1;grid-row:auto}
}

/* ---------- Price ---------- */
.price-grid{display:grid;grid-template-columns:1fr 1.12fr 1fr;gap:24px;align-items:stretch}
.price-card{display:flex;flex-direction:column;position:relative}
.price-card.is-featured{border-color:#BFD6EC;box-shadow:var(--shadow-2)}
.price-card.is-featured::before{content:'';position:absolute;left:0;right:0;top:0;height:3px;background:var(--brand-700)}
.price-name{font-size:17px;font-weight:600}
.price-amount{margin-top:14px;font-size:32px;font-weight:700;color:var(--brand-900);line-height:1.2}
.price-amount small{font-size:14px;font-weight:400;color:var(--ink-600);margin-left:4px}
.price-list{margin:20px 0 24px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.price-list li{position:relative;padding-left:22px;font-size:14.5px;color:var(--ink-600)}
.price-list li::before{content:'';position:absolute;left:0;top:7px;width:12px;height:7px;border-left:2px solid var(--track-600);border-bottom:2px solid var(--track-600);transform:rotate(-45deg)}
@media (max-width:1024px){
  .price-grid{grid-template-columns:1fr;max-width:480px;margin:0 auto}
}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:48px;align-items:start}
.faq-side p{margin-top:12px;font-size:15px;color:var(--ink-600)}
.faq-item{position:relative;border:1px solid var(--line);border-radius:var(--radius-card);background:#fff;margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.is-open{border-color:#BFD6EC;box-shadow:var(--shadow-1)}
.faq-item.is-open::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand-700);z-index:2}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;padding:18px 20px;background:none;border:0;text-align:left;font-size:16px;font-weight:600;color:var(--ink-900);cursor:pointer;letter-spacing:.01em}
.faq-item.is-open .faq-q{background:var(--brand-100)}
.faq-q:focus-visible{outline:3px solid rgba(14,90,167,.25);outline-offset:-3px}
.faq-icon{position:relative;flex:0 0 auto;width:18px;height:18px}
.faq-icon::before,.faq-icon::after{content:'';position:absolute;background:var(--brand-700);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{display:none;padding:0 20px 20px;font-size:15px;color:var(--ink-600)}
.faq-item.is-open .faq-a{display:block}
@media (max-width:900px){
  .faq-layout{grid-template-columns:1fr;gap:28px}
}

/* ---------- CTA band ---------- */
.cta-band{background:var(--brand-100);border:1px solid #CFE0F2;border-radius:18px;padding:46px 48px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);font-weight:600;color:var(--brand-900);line-height:1.4}
.cta-band p{margin-top:8px;font-size:15px;color:#33506C}
@media (max-width:640px){.cta-band{padding:26px 20px}}

/* ---------- Footer ---------- */
.site-footer{background:var(--brand-900);color:#fff;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand{font-size:17px;font-weight:700;display:flex;align-items:center;gap:10px}
.footer-brand .logo-mark{background:#fff;color:var(--brand-900)}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:320px}
.footer-title{font-size:15px;font-weight:600;margin-bottom:16px;color:#fff}
.footer-link{display:block;padding:5px 0;font-size:14px;color:rgba(255,255,255,.72);transition:color .2s ease,transform .2s ease}
.footer-link:hover{color:#fff;transform:translateX(2px)}
.footer-info{font-size:14px;color:rgba(255,255,255,.72);line-height:1.9}
.footer-bottom{border-top:1px solid rgba(255,255,255,.16);margin-top:48px;padding:20px 0;font-size:13px;color:rgba(255,255,255,.6);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media (max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:640px){.footer-grid{grid-template-columns:1fr;gap:28px}.site-footer{padding-top:44px}}

/* roulang page: article */
:root{
  --brand-900:#0A3F73;
  --brand-700:#0E5AA7;
  --brand-500:#1B7BD4;
  --brand-100:#E4EEF9;
  --brand-50:#F2F7FC;
  --teal-500:#14A0A0;
  --teal-100:#E2F5F4;
  --orange:#FF7A29;
  --ink-900:#16202B;
  --ink-600:#5A6B7B;
  --ink-400:#8A99A8;
  --bg:#F5F7FA;
  --card:#FFFFFF;
  --line:#E3E9F0;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-pic:12px;
  --shadow-sm:0 1px 2px rgba(16,32,48,.04), 0 8px 24px rgba(16,32,48,.06);
  --shadow-lg:0 12px 32px rgba(16,32,48,.10);
  --shadow-head:0 2px 12px rgba(16,32,48,.07);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--ink-900);
  background:var(--bg);
}
img{max-width:100%;display:block}
a{color:var(--brand-500);text-decoration:none}
a:hover{color:var(--brand-700)}
button{font:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(14,90,167,.25);outline-offset:2px;border-radius:6px}

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

/* ============ HEADER ============ */
.site-header{position:sticky;top:0;z-index:60;background:#fff;transition:box-shadow .2s ease}
.site-header.is-stuck{box-shadow:var(--shadow-head)}
.brand-bar{border-bottom:1px solid var(--line);background:#fff}
.brand-row{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink-900);font-weight:700}
.logo:hover{color:var(--ink-900)}
.logo-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:9px;
  background:linear-gradient(140deg,var(--brand-700),var(--brand-900));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;letter-spacing:0
}
.logo-text{font-size:17px;font-weight:700;white-space:nowrap;letter-spacing:.01em}
.brand-right{display:flex;align-items:center;gap:18px}
.text-link{color:var(--ink-600);font-size:14px}
.text-link:hover{color:var(--brand-700)}
.nav-toggle{
  display:none;width:42px;height:38px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:#fff;cursor:pointer;position:relative
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  width:18px;height:2px;background:var(--brand-900);border-radius:2px;transition:.2s ease
}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:translateX(-50%) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:translateX(-50%) rotate(-45deg)}

.channel-bar{background:#EAF2FB;border-bottom:1px solid var(--line)}
.channel-inner{display:flex;align-items:stretch;gap:6px;height:52px;overflow-x:auto;scrollbar-width:none}
.channel-inner::-webkit-scrollbar{display:none}
.channel-link{
  display:flex;align-items:center;padding:0 14px;white-space:nowrap;
  font-size:15px;color:var(--ink-600);border-bottom:3px solid transparent;transition:.2s ease
}
.channel-link:hover{color:var(--brand-700)}
.channel-link.is-active{color:var(--brand-700);font-weight:700;border-bottom-color:var(--brand-700)}
.mobile-nav{display:none;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);padding:8px 24px 16px}
.mobile-nav.is-open{display:flex}
.mobile-nav a{padding:11px 0;font-size:15px;color:var(--ink-900);border-bottom:1px dashed var(--line)}
.mobile-nav a:last-child{border-bottom:0}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:all .2s ease;white-space:nowrap
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--brand-700);color:#fff;box-shadow:0 1px 2px rgba(16,32,48,.06)}
.btn-primary:hover{background:var(--brand-900);color:#fff;box-shadow:var(--shadow-lg)}
.btn-ghost{background:#fff;color:var(--brand-700);border-color:var(--brand-700)}
.btn-ghost:hover{background:var(--brand-100);color:var(--brand-900)}
.btn-light{background:#fff;color:var(--brand-900)}
.btn-light:hover{background:var(--brand-100);color:var(--brand-900)}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-700)}
.link-arrow svg{transition:transform .2s ease}
.link-arrow:hover svg{transform:translateX(3px)}

/* ============ PAGE HEAD BAND ============ */
.page-band{
  position:relative;background-color:var(--brand-900);
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  padding:34px 0 30px;overflow:hidden
}
.page-band::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(10,63,115,.94) 0%,rgba(10,63,115,.82) 52%,rgba(14,90,167,.66) 100%)
}
.page-band .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.78);margin-bottom:14px}
.crumb a{color:rgba(255,255,255,.9)}
.crumb a:hover{color:#fff;text-decoration:underline}
.crumb .sep{color:rgba(255,255,255,.45)}
.crumb .current{color:rgba(255,255,255,.62);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.band-label{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:#fff;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
  border-radius:999px;padding:5px 14px}
.band-line{color:rgba(255,255,255,.86);font-size:14px;margin-top:12px;max-width:660px}

/* ============ ARTICLE ============ */
.article-shell{padding:36px 0 64px}
.article-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);padding:38px 44px 42px
}
.article-head{max-width:760px;margin:0 auto}
.chip{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em
}
.chip-blue{background:var(--brand-100);color:var(--brand-700)}
.chip-teal{background:var(--teal-100);color:var(--teal-500)}
.chip-orange{background:#FFF1E7;color:#D9611A}
.article-head h1{
  font-size:clamp(26px,3.4vw,40px);line-height:1.32;font-weight:700;
  letter-spacing:.01em;color:var(--ink-900);margin:16px 0 16px
}
.meta-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  font-size:13.5px;color:var(--ink-400);padding-bottom:22px;border-bottom:1px solid var(--line)
}
.meta-bar .meta-item{display:inline-flex;align-items:center;gap:7px}
.meta-bar svg{width:15px;height:15px;stroke:var(--ink-400)}
.head-figure{margin:26px auto 0;max-width:760px}
.head-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-pic);border:1px solid var(--line)}

.article-body{max-width:760px;margin:0 auto;padding-top:30px;font-size:16px;line-height:1.9;color:#20303F}
.article-body p{margin:0 0 18px}
.article-body h2{
  font-size:clamp(20px,2.4vw,25px);font-weight:600;line-height:1.45;color:var(--ink-900);
  margin:32px 0 16px;padding-left:14px;border-left:4px solid var(--brand-700);letter-spacing:.01em
}
.article-body h3{font-size:18.5px;font-weight:600;color:var(--ink-900);margin:26px 0 12px}
.article-body h4{font-size:16.5px;font-weight:600;color:var(--brand-700);margin:22px 0 10px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:0}
.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:7px;height:7px;border-radius:2px;
  background:var(--brand-500);transform:rotate(45deg)
}
.article-body ol{counter-reset:olnum}
.article-body ol li{position:relative;padding-left:32px;margin-bottom:10px;counter-increment:olnum}
.article-body ol li::before{
  content:counter(olnum);position:absolute;left:0;top:2px;width:21px;height:21px;border-radius:6px;
  background:var(--brand-100);color:var(--brand-700);font-size:12.5px;font-weight:700;
  display:flex;align-items:center;justify-content:center
}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;background:var(--brand-50);
  border-left:3px solid var(--brand-700);border-radius:0 var(--radius-pic) var(--radius-pic) 0;
  color:var(--ink-600);font-size:15.5px
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-pic);margin:22px auto;border:1px solid var(--line)}
.article-body figure{margin:22px 0}
.article-body figcaption{font-size:13.5px;color:var(--ink-400);text-align:center;margin-top:10px}
.article-body a{color:var(--brand-500);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-900)}
.article-body table{
  display:block;width:100%;overflow-x:auto;border-collapse:collapse;margin:22px 0;font-size:14.5px
}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;text-align:left;white-space:nowrap}
.article-body th{background:var(--brand-50);color:var(--brand-900);font-weight:600}
.article-body code{background:var(--brand-50);color:var(--brand-900);padding:2px 6px;border-radius:6px;font-size:14px}
.article-body hr{border:0;border-top:1px solid var(--line);margin:30px 0}

/* 空态 */
.empty-state{
  background:var(--bg);border:1px dashed var(--line);border-radius:var(--radius-card);
  padding:48px 24px;text-align:center
}
.empty-state svg{width:42px;height:42px;stroke:var(--ink-400);margin:0 auto 14px}
.empty-state p{color:var(--ink-600);font-size:15px;margin-bottom:16px}

/* 标签行 */
.tag-row{
  max-width:760px;margin:34px auto 0;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px
}
.tag-row .tag-title{font-size:13.5px;color:var(--ink-400);margin-right:4px}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:999px;
  background:#fff;border:1px solid var(--line);font-size:13.5px;color:var(--ink-600);transition:.2s ease
}
.tag:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-50)}
.tag.is-accent{background:var(--teal-100);border-color:transparent;color:var(--teal-500);font-weight:600}

/* 上下篇 */
.post-nav{max-width:760px;margin:30px auto 0;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.post-nav a{
  display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);padding:16px 18px;box-shadow:var(--shadow-sm);
  transition:all .2s ease;color:var(--ink-900)
}
.post-nav a:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);color:var(--brand-900)}
.post-nav .arrow{
  width:34px;height:34px;flex:0 0 34px;border-radius:9px;background:var(--brand-100);
  display:flex;align-items:center;justify-content:center;color:var(--brand-700)
}
.post-nav .pn-label{font-size:12.5px;color:var(--ink-400);display:block;margin-bottom:3px}
.post-nav .pn-text{
  font-size:14.5px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden
}
.post-nav .next{flex-direction:row-reverse;text-align:right}
.post-nav .next .pn-label{text-align:right}

/* 相关推荐 */
.related{margin-top:52px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.section-head h2{font-size:clamp(21px,2.4vw,27px);font-weight:600;color:var(--ink-900);line-height:1.35}
.section-head .sub{font-size:14px;color:var(--ink-400);margin-top:6px}
.related-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:22px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);overflow:hidden;display:flex;flex-direction:column;
  transition:all .2s ease;color:inherit
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.card-media{position:relative;background:var(--brand-100)}
.card-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.card-media .chip{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94)}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:17px;font-weight:600;line-height:1.5;color:var(--ink-900);margin-bottom:10px}
.card:hover .card-body h3{color:var(--brand-700)}
.card-desc{
  font-size:14px;color:var(--ink-600);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:14px
}
.card-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--ink-400);border-top:1px solid var(--line);padding-top:12px
}

/* 返回入口 */
.back-links{max-width:760px;margin:34px auto 0;display:flex;flex-wrap:wrap;gap:26px}

/* ============ CTA BAND ============ */
.cta-band{padding:0 0 68px}
.cta-inner{
  background:var(--brand-50);border:1px solid #CFE1F3;border-radius:var(--radius-card);
  padding:34px 38px;display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap
}
.cta-inner h2{font-size:clamp(19px,2.2vw,24px);font-weight:600;color:var(--brand-900);line-height:1.45}
.cta-inner p{font-size:14.5px;color:var(--ink-600);margin-top:8px;max-width:640px}

/* ============ FOOTER ============ */
.site-footer{background:var(--brand-900);color:#fff;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px;padding-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;margin-bottom:14px}
.footer-brand .logo-mark{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22)}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.74)}
.footer-title{font-size:15px;font-weight:600;margin-bottom:16px;color:#fff}
.footer-link{display:block;font-size:14px;color:rgba(255,255,255,.74);padding:6px 0;transition:.2s ease}
.footer-link:hover{color:#fff;transform:translateX(3px)}
.footer-info{font-size:13.5px;line-height:2;color:rgba(255,255,255,.74)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.16);padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.62)
}

/* 返回顶部 */
.to-top{
  position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:12px;
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);
  display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:70;
  opacity:0;visibility:hidden;transition:.25s ease
}
.to-top.is-show{opacity:1;visibility:visible}
.to-top:hover{background:var(--brand-100);border-color:var(--brand-500)}

/* ============ RESPONSIVE ============ */
@media (max-width:1024px){
  .container{padding:0 20px}
  .article-card{padding:32px 30px 34px}
  .related-grid{grid-template-columns:1fr 1fr}
  .related-grid .card:first-child{grid-column:1 / -1}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-inner{padding:28px 26px}
}
@media (max-width:768px){
  .brand-right .text-link{display:none}
  .nav-toggle{display:block}
  .channel-inner{height:48px}
  .page-band{padding:26px 0 24px}
  .article-shell{padding:26px 0 48px}
  .article-card{padding:24px 20px 26px}
  .article-body{font-size:15.5px;line-height:1.85}
  .post-nav{grid-template-columns:1fr}
  .post-nav .next{flex-direction:row;text-align:left}
  .post-nav .next .pn-label{text-align:left}
  .section-head{flex-direction:column;align-items:flex-start}
  .cta-band{padding:0 0 52px}
  .cta-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .container{padding:0 16px}
  .logo-text{font-size:15.5px}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .article-head h1{font-size:24px}
  .crumb .current{max-width:210px}
}

/* roulang page: category1 */
:root{
  --brand-900:#0A3F73;
  --brand-700:#0E5AA7;
  --brand-500:#1B7BD4;
  --brand-100:#E4EEF9;
  --teal:#14A0A0;
  --teal-100:#E2F5F4;
  --orange:#FF7A29;
  --text:#16202B;
  --text-2:#5A6B7B;
  --text-3:#8A99A8;
  --bg:#F5F7FA;
  --card:#FFFFFF;
  --line:#E3E9F0;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh:0 1px 2px rgba(16,32,48,.04), 0 8px 24px rgba(16,32,48,.06);
  --sh-hover:0 12px 32px rgba(16,32,48,.10);
  --container:1200px;
  --section-py:80px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-500);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-700);}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
button{font:inherit;border:0;background:none;cursor:pointer;}
:focus-visible{outline:3px solid rgba(14,90,167,.25);outline-offset:2px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
.section{padding:var(--section-py) 0;}
.section + .section{border-top:1px solid var(--line);}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;}
.brand-bar{background:#fff;border-bottom:1px solid var(--line);}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px;}
.logo{display:flex;align-items:center;gap:10px;}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 34px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand-700),var(--teal));
  color:#fff;font-size:16px;font-weight:700;
}
.logo-text{font-size:17px;font-weight:700;color:var(--text);white-space:nowrap;}
.brand-right{display:flex;align-items:center;gap:16px;}
.text-link{font-size:14px;color:var(--text-2);}
.text-link:hover{color:var(--brand-700);}
.btn{
  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;letter-spacing:.01em;
  transition:background-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-primary{background:var(--brand-700);color:#fff;box-shadow:0 1px 2px rgba(16,32,48,.06);}
.btn-primary:hover{background:var(--brand-900);color:#fff;box-shadow:var(--sh-hover);transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--brand-700);border:1px solid var(--brand-700);}
.btn-ghost:hover{background:var(--brand-100);color:var(--brand-900);}
.btn[disabled],.btn:disabled{opacity:.5;pointer-events:none;}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand-500);}
.arrow-link::after{content:"→";transition:transform .2s ease;}
.arrow-link:hover{color:var(--brand-700);}
.arrow-link:hover::after{transform:translateX(3px);}

.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);position:relative;}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--text);border-radius:2px;transform:translateX(-50%);
}
.nav-toggle span{top:19px;}
.nav-toggle span::before,.nav-toggle span::after{content:"";left:0;transform:none;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

.channel-bar{background:#EAF2FB;border-bottom:1px solid var(--line);}
.channel-inner{display:flex;align-items:stretch;gap:28px;height:52px;overflow-x:auto;scrollbar-width:none;}
.channel-inner::-webkit-scrollbar{display:none;}
.channel-link{
  display:inline-flex;align-items:center;white-space:nowrap;
  font-size:15px;color:var(--text-2);border-bottom:3px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.channel-link:hover{color:var(--brand-700);}
.channel-link.is-active{color:var(--brand-900);font-weight:700;border-bottom-color:var(--brand-700);}
.mobile-nav{display:none;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);padding:8px 20px 16px;}
.mobile-nav a{padding:12px 0;border-bottom:1px solid var(--line);font-size:15px;color:var(--text-2);}
.mobile-nav a:last-child{border-bottom:0;}
.mobile-nav.is-open{display:flex;}

/* ---------- 内页横幅 ---------- */
.page-hero{
  position:relative;color:#fff;
  background-image:linear-gradient(105deg,rgba(10,63,115,.94) 0%,rgba(14,90,167,.86) 48%,rgba(20,160,160,.72) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
}
.page-hero-inner{padding:52px 20px 56px;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.78);margin-bottom:20px;flex-wrap:wrap;}
.breadcrumb a{color:rgba(255,255,255,.86);}
.breadcrumb a:hover{color:#fff;}
.breadcrumb .sep{color:rgba(255,255,255,.5);}
.breadcrumb .current{color:rgba(255,255,255,.68);}
.page-hero h1{
  font-size:clamp(28px,4vw,44px);line-height:1.25;font-weight:700;
  color:#fff;max-width:820px;letter-spacing:.01em;
}
.hero-sub{
  margin-top:16px;max-width:660px;
  font-size:17px;line-height:1.75;color:rgba(255,255,255,.9);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-tags .chip{
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.34);
  color:#fff;padding:6px 14px;border-radius:999px;font-size:13px;
}

/* ---------- 分类页两栏 ---------- */
.cat-layout{display:grid;grid-template-columns:1fr;gap:32px;align-items:start;}
.cat-aside{display:flex;flex-direction:column;gap:18px;}
.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh);padding:18px;}
.toc h2{font-size:13px;font-weight:600;color:var(--text-3);letter-spacing:.06em;margin-bottom:10px;}
.toc a{display:block;padding:9px 12px;border-radius:8px;font-size:15px;color:var(--text-2);}
.toc a:hover{background:var(--brand-100);color:var(--brand-700);}
.toc a.is-current{background:var(--brand-100);color:var(--brand-900);font-weight:600;box-shadow:inset 3px 0 0 var(--brand-700);}
.contact-card{
  background:var(--teal-100);border:1px solid rgba(20,160,160,.24);
  border-radius:var(--r-card);padding:18px;
}
.contact-card h3{font-size:16px;font-weight:600;color:var(--text);margin-bottom:8px;}
.contact-card p{font-size:14px;color:var(--text-2);line-height:1.85;}
.contact-card .contact-line{margin-top:12px;font-size:14px;color:var(--text);}
.contact-card .contact-line strong{color:var(--brand-700);}

.cat-main{display:flex;flex-direction:column;gap:44px;}
.block-head{margin-bottom:22px;}
.block-eyebrow{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.1em;
  color:var(--brand-700);background:var(--brand-100);border-radius:999px;padding:4px 12px;margin-bottom:12px;
}
.block-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:600;line-height:1.35;}
.block-head p{margin-top:10px;font-size:15px;color:var(--text-2);max-width:720px;}

/* 概览卡组：非对称 7/5 + 通栏 */
.overview-grid{display:grid;grid-template-columns:1fr;gap:18px;}
.ov-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh);padding:22px;transition:box-shadow .2s ease,transform .2s ease;
}
.ov-card:hover{box-shadow:var(--sh-hover);transform:translateY(-3px);}
.ov-card h3{font-size:18px;font-weight:600;margin-bottom:10px;}
.ov-card p{font-size:15px;color:var(--text-2);}
.ov-card img{border-radius:var(--r-img);width:100%;height:190px;object-fit:cover;margin-bottom:16px;}
.ov-card .mini-list{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
.ov-card .mini-list li{
  position:relative;padding-left:18px;font-size:15px;color:var(--text-2);
}
.ov-card .mini-list li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--teal);
}
.ov-strip{
  background:linear-gradient(100deg,#fff 0%,var(--brand-100) 100%);
  border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh);padding:22px;
}
.ov-strip h3{font-size:18px;font-weight:600;margin-bottom:14px;}
.ov-strip .strip-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;}
.ov-strip .strip-item{
  background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px;
}
.ov-strip .strip-item strong{display:block;font-size:15px;font-weight:600;color:var(--text);}
.ov-strip .strip-item span{font-size:13px;color:var(--text-3);}

/* 要点分组清单 */
.step-list{display:flex;flex-direction:column;gap:14px;}
.step-item{
  display:grid;grid-template-columns:44px 1fr;gap:16px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh);transition:box-shadow .2s ease,transform .2s ease;
}
.step-item:hover{box-shadow:var(--sh-hover);transform:translateY(-3px);}
.step-num{
  width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-100);color:var(--brand-700);font-weight:700;font-size:15px;
}
.step-item h3{font-size:17px;font-weight:600;margin-bottom:6px;}
.step-item p{font-size:15px;color:var(--text-2);}
.step-item p + p{margin-top:6px;}

/* 配图区 */
.media-block{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh);overflow:hidden;
}
.media-block img{width:100%;height:260px;object-fit:cover;}
.media-body{padding:22px;}
.media-body h3{font-size:18px;font-weight:600;margin-bottom:10px;}
.media-body p{font-size:15px;color:var(--text-2);}
.media-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.tag{
  display:inline-flex;align-items:center;border-radius:999px;padding:5px 13px;
  font-size:13px;background:var(--brand-100);color:var(--brand-700);
}
.tag-teal{background:var(--teal-100);color:#0F7C7C;}
.tag-orange{background:rgba(255,122,41,.12);color:#C4551A;}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:box-shadow .2s ease;
}
.faq-item:hover{box-shadow:var(--sh);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-size:20px;color:var(--brand-500);line-height:1;font-weight:400;flex:0 0 auto;
}
.faq-item[open]{border-left:3px solid var(--brand-700);background:var(--brand-100);box-shadow:var(--sh);}
.faq-item[open] summary::after{content:"–";}
.faq-body{padding:0 22px 20px;font-size:15px;color:var(--text-2);}

/* CTA */
.cta-band{
  background:var(--brand-100);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-inner{
  display:flex;flex-direction:column;gap:22px;align-items:flex-start;
  padding:52px 20px;
}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);font-weight:600;line-height:1.35;}
.cta-inner p{font-size:16px;color:var(--text-2);max-width:640px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.82);padding:56px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-brand .logo-mark{background:linear-gradient(135deg,#1B7BD4,#14A0A0);}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.72);max-width:340px;}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer-link{display:block;font-size:14px;color:rgba(255,255,255,.72);padding:6px 0;}
.footer-link:hover{color:#fff;}
.footer-info{font-size:14px;line-height:1.95;color:rgba(255,255,255,.72);}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.16);
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.6);
}

/* ---------- 响应式 ---------- */
@media (min-width:640px){
  .strip-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:768px){
  .overview-grid{grid-template-columns:repeat(12,minmax(0,1fr));}
  .ov-a{grid-column:span 7;}
  .ov-b{grid-column:span 5;}
  .ov-c{grid-column:span 12;}
  .ov-strip .strip-grid{grid-template-columns:repeat(4,minmax(0,1fr));}
  .cta-inner{padding:56px 20px;}
}
@media (min-width:1024px){
  .cat-layout{grid-template-columns:268px minmax(0,1fr);gap:40px;}
  .cat-aside{position:sticky;top:132px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
  .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;padding:60px 20px;}
  .cta-text{max-width:660px;}
}
@media (max-width:1023px){
  :root{--section-py:56px;}
  .page-hero-inner{padding:40px 20px 44px;}
}
@media (max-width:767px){
  :root{--section-py:40px;}
  body{font-size:15.5px;}
  .logo-text{font-size:15px;}
  .brand-right .text-link{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .channel-inner{gap:20px;height:48px;}
  .step-item{grid-template-columns:36px 1fr;gap:12px;padding:16px;}
  .step-num{width:34px;height:34px;font-size:14px;}
  .ov-strip .strip-grid{grid-template-columns:1fr;}
}

/* roulang page: category2 */
:root{
  --brand-900:#0A3F73;
  --brand-700:#0E5AA7;
  --brand-500:#1B7BD4;
  --brand-100:#E4EEF9;
  --track:#14A0A0;
  --track-100:#E2F5F4;
  --accent:#FF7A29;
  --text:#16202B;
  --text-2:#5A6B7B;
  --text-3:#8A99A8;
  --bg:#F5F7FA;
  --card:#FFFFFF;
  --line:#E3E9F0;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-card:0 1px 2px rgba(16,32,48,.04), 0 8px 24px rgba(16,32,48,.06);
  --shadow-hover:0 12px 32px rgba(16,32,48,.10);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:PingFang SC,Microsoft YaHei,Hiragino Sans GB,Noto Sans SC,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(14,90,167,.25);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;transition:box-shadow .2s ease}
.site-header.is-stuck{box-shadow:0 6px 22px rgba(16,32,48,.08)}
.brand-bar{background:#fff;border-bottom:1px solid var(--line)}
.brand-row{height:64px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--brand-900)}
.logo-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand-700);color:#fff;
  display:grid;place-items:center;font-size:16px;font-weight:700;flex:0 0 auto;
}
.logo-text{white-space:nowrap}
.brand-right{display:flex;align-items:center;gap:16px}
.text-link{font-size:14px;color:var(--text-2);transition:color .2s ease}
.text-link:hover{color:var(--brand-700)}
.channel-bar{background:#EAF2FB;border-bottom:1px solid var(--line)}
.channel-inner{
  height:52px;display:flex;align-items:stretch;gap:28px;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
}
.channel-inner::-webkit-scrollbar{display:none}
.channel-link{
  display:inline-flex;align-items:center;white-space:nowrap;
  font-size:15px;color:var(--text-2);border-bottom:3px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.channel-link:hover{color:var(--brand-700)}
.channel-link.is-active{color:var(--brand-700);font-weight:700;border-bottom-color:var(--brand-700)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--brand-900);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:'';position:absolute;left:0;width:18px;height:2px;background:var(--brand-900);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-nav{
  display:none;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);
  padding:8px 24px 16px;
}
.mobile-nav.is-open{display:flex}
.mobile-nav a{
  padding:12px 0;font-size:15px;color:var(--text-2);border-bottom:1px solid var(--line);
}
.mobile-nav a:last-child{border-bottom:0}
.mobile-nav a.is-active{color:var(--brand-700);font-weight:700}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-btn);
  border:1px solid transparent;font-size:15px;font-weight:600;
  cursor:pointer;white-space:nowrap;transition:all .2s ease;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-lg{height:48px;padding:0 24px;font-size:16px}
.btn-primary{background:var(--brand-700);border-color:var(--brand-700);color:#fff}
.btn-primary:hover{background:var(--brand-900);border-color:var(--brand-900);box-shadow:0 8px 20px rgba(14,90,167,.28);transform:translateY(-2px)}
.btn-outline{background:#fff;border-color:var(--brand-700);color:var(--brand-700)}
.btn-outline:hover{background:var(--brand-100);transform:translateY(-2px)}
.btn-light{background:#fff;border-color:#fff;color:var(--brand-900)}
.btn-light:hover{background:#EAF2FB;transform:translateY(-2px);box-shadow:0 10px 26px rgba(2,20,40,.22)}
.btn-ghost-light{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.6);color:#fff}
.btn-ghost-light:hover{background:rgba(255,255,255,.16);transform:translateY(-2px)}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.text-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand-700);transition:color .2s ease,gap .2s ease;
}
.text-arrow::after{content:'→';transition:transform .2s ease}
.text-arrow:hover{color:var(--brand-900);gap:10px}
.text-arrow:hover::after{transform:translateX(2px)}

/* ---------- 标签 ---------- */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:13px;font-weight:600;
  background:var(--brand-100);color:var(--brand-700);
}
.chip-track{background:var(--track-100);color:#0E7C7C}
.chip-light{background:rgba(255,255,255,.18);color:#fff;border:1px solid rgba(255,255,255,.35)}
.chip-accent{background:#FFF1E7;color:#C4531A}

/* ---------- 横幅 ---------- */
.banner{
  position:relative;color:#fff;overflow:hidden;
  padding:80px 0 72px;
  background-image:
    linear-gradient(100deg,rgba(7,42,78,.94) 0%,rgba(10,63,115,.86) 45%,rgba(11,79,138,.72) 100%),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
}
.banner::after{
  content:'';position:absolute;right:-70px;bottom:-90px;width:320px;height:320px;
  border:2px solid rgba(255,255,255,.16);border-radius:50%;
}
.banner .container{position:relative;z-index:2}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72);margin-bottom:20px}
.crumb a{color:rgba(255,255,255,.86)}
.crumb a:hover{color:#fff;text-decoration:underline}
.crumb-sep{color:rgba(255,255,255,.45)}
.crumb-current{color:rgba(255,255,255,.7)}
.banner h1{
  font-size:clamp(28px,4vw,44px);line-height:1.25;font-weight:700;
  margin:16px 0 0;max-width:820px;letter-spacing:.01em;
}
.banner-sub{
  margin-top:16px;max-width:680px;font-size:16px;line-height:1.8;color:#D5E5F4;
}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.trust-row{
  display:flex;flex-wrap:wrap;gap:40px;margin-top:44px;
  padding-top:26px;border-top:1px solid rgba(255,255,255,.2);
}
.trust-item{display:flex;flex-direction:column;gap:2px}
.trust-item strong{font-size:24px;font-weight:700;color:#fff;line-height:1.3}
.trust-item span{font-size:13px;color:rgba(255,255,255,.7)}

/* ---------- 板块 ---------- */
.section{padding:80px 0}
.section-alt{background:#fff}
.section-line{border-top:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{
  font-size:clamp(22px,2.6vw,32px);line-height:1.32;font-weight:600;letter-spacing:.01em;
}
.section-head p{margin-top:12px;font-size:15.5px;color:var(--text-2)}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ---------- 概览卡片（非对称 7/5） ---------- */
.overview-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);transition:box-shadow .2s ease,transform .2s ease;
}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.card-pad{padding:26px}
.overview-main{grid-row:span 2;display:flex;flex-direction:column;overflow:hidden}
.overview-main img{width:100%;aspect-ratio:16/9;object-fit:cover}
.overview-main .body{padding:26px;display:flex;flex-direction:column;gap:12px}
.overview-main h3{font-size:20px;font-weight:600}
.overview-main p{font-size:15px;color:var(--text-2)}
.overview-side{display:flex;flex-direction:column;gap:12px}
.overview-side h3{font-size:18px;font-weight:600}
.overview-side p{font-size:14.5px;color:var(--text-2)}
.icon-badge{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:var(--brand-100);color:var(--brand-700);font-weight:700;font-size:15px;
}
.icon-badge-track{background:var(--track-100);color:#0E7C7C}
.card-flex{display:flex;gap:16px;align-items:flex-start}

/* ---------- 时间轴 ---------- */
.timeline{margin-top:8px}
.tl-item{position:relative;padding:0 0 34px 60px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:'';position:absolute;left:19px;top:44px;bottom:0;width:2px;background:var(--line);
}
.tl-item:last-child::before{display:none}
.tl-dot{
  position:absolute;left:0;top:0;width:40px;height:40px;border-radius:50%;
  background:#fff;border:2px solid var(--brand-500);color:var(--brand-700);
  display:grid;place-items:center;font-size:14px;font-weight:700;
}
.tl-item h3{font-size:17px;font-weight:600;margin-bottom:6px}
.tl-item p{font-size:14.5px;color:var(--text-2);max-width:760px}
.tl-meta{margin-top:8px;font-size:13px;color:var(--text-3)}

/* ---------- 条目网格 ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.entry-card{display:flex;flex-direction:column;overflow:hidden}
.entry-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.entry-card .body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.entry-card h3{font-size:18px;font-weight:600}
.entry-card p{font-size:14.5px;color:var(--text-2)}
.entry-tags{display:flex;gap:8px;flex-wrap:wrap}

/* ---------- 数据 / 证据块 ---------- */
.section-dark{
  background:var(--brand-900);color:#fff;padding:72px 0;
}
.section-dark h2{font-size:clamp(22px,2.4vw,28px);font-weight:600}
.section-dark .lead{margin-top:12px;color:#BFD6EA;font-size:15.5px;max-width:680px}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.stat-item{border-top:2px solid rgba(255,255,255,.22);padding-top:20px}
.stat-item strong{display:block;font-size:30px;font-weight:700;line-height:1.3}
.stat-item span{display:block;margin-top:6px;font-size:14px;color:#BFD6EA}
.note-strip{
  margin-top:36px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius-card);padding:20px 24px;font-size:14.5px;color:#D9E8F5;
}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:40px;align-items:start}
.faq-aside h2{font-size:clamp(22px,2.4vw,28px);font-weight:600}
.faq-aside p{margin-top:12px;font-size:15px;color:var(--text-2)}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 16px;background:transparent;border:0;border-left:3px solid transparent;
  font-size:16px;font-weight:600;text-align:left;cursor:pointer;transition:background .2s ease,border-color .2s ease;
}
.faq-q:hover{background:#F8FAFD}
.faq-q .sign{
  flex:0 0 auto;width:24px;height:24px;border-radius:50%;border:1px solid var(--line);
  display:grid;place-items:center;font-size:15px;color:var(--brand-700);background:#fff;
  line-height:1;transition:transform .2s ease;
}
.faq-item.is-open .faq-q{background:var(--brand-100);border-left-color:var(--brand-700);color:var(--brand-900)}
.faq-item.is-open .sign{transform:rotate(45deg)}
.faq-a{display:none;padding:0 16px 20px;border-left:3px solid transparent;font-size:14.5px;color:var(--text-2)}
.faq-item.is-open .faq-a{display:block;border-left-color:var(--brand-700)}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:var(--brand-100);border-top:1px solid #CFE0F2;border-bottom:1px solid #CFE0F2;
  padding:56px 0;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(20px,2.2vw,26px);font-weight:600;color:var(--brand-900)}
.cta-inner p{margin-top:8px;font-size:14.5px;color:var(--text-2);max-width:620px}
.cta-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-900);color:#fff;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700}
.footer-brand .logo-mark{background:#fff;color:var(--brand-900)}
.footer-desc{margin-top:14px;font-size:14px;line-height:1.8;color:#B9D1E6;max-width:320px}
.footer-title{font-size:15px;font-weight:600;margin-bottom:16px}
.footer-link{display:block;font-size:14px;color:#C6DAEC;padding:5px 0;transition:color .2s ease}
.footer-link:hover{color:#fff}
.footer-info{font-size:14px;color:#B9D1E6;line-height:2}
.footer-bottom{
  margin-top:48px;padding:20px 0;border-top:1px solid rgba(255,255,255,.16);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#9FBBD4;
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:12px;
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-card);
  color:var(--brand-700);font-size:16px;cursor:pointer;display:none;place-items:center;z-index:70;
}
.to-top.is-show{display:grid}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .overview-grid{grid-template-columns:1fr}
  .overview-main{grid-row:auto}
  .faq-wrap{grid-template-columns:1fr;gap:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .section{padding:64px 0}
}
@media (max-width:900px){
  .text-link{display:none}
  .nav-toggle{display:flex}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .banner{padding:56px 0 52px}
  .trust-row{gap:26px;margin-top:32px}
  .entry-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr;gap:18px}
  .section{padding:52px 0}
  .section-dark{padding:52px 0}
  .cta-band{padding:44px 0}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{margin-top:32px;flex-direction:column}
  .faq-q{font-size:15px;padding:16px 12px}
}
@media (max-width:520px){
  .brand-row{height:60px}
  .logo{font-size:15px}
  .logo-text{max-width:180px;overflow:hidden;text-overflow:ellipsis}
  .btn-lg{width:100%}
  .banner-actions{flex-direction:column;align-items:stretch}
  .banner-actions .btn{width:100%}
  .trust-item strong{font-size:20px}
  .card-pad{padding:20px}
  .overview-main .body{padding:20px}
  .tl-item{padding-left:52px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
}