/* roulang page: index */
:root{
  --c-primary:#1E6BA8;
  --c-primary-dark:#14507F;
  --c-primary-soft:#E8F1F8;
  --c-accent:#E98A2B;
  --c-accent-hover:#CF7519;
  --c-accent-soft:#FDF3E6;
  --c-success:#2E9E7E;
  --c-warn:#C4543F;
  --c-text:#1B2A36;
  --c-text-2:#5A6C7A;
  --c-text-3:#8B9AA6;
  --c-line:#E3E9EF;
  --c-bg:#F6F8FA;
  --c-card:#FFFFFF;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(27,42,54,.04),0 8px 24px rgba(27,42,54,.06);
  --sh-card-hover:0 12px 32px rgba(27,42,54,.10);
  --t:180ms ease;
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:28px;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{font-weight:600;color:var(--c-text)}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;border-radius:8px;z-index:200}
.skip:focus{left:12px;top:12px}

/* ---------- App Shell ---------- */
.shell{display:flex;min-height:100vh;align-items:stretch}
.sidebar{
  width:240px;flex:0 0 240px;background:#fff;border-right:1px solid var(--c-line);
  position:sticky;top:0;height:100vh;display:flex;flex-direction:column;
  padding:20px 12px 16px;z-index:80;transition:width var(--t),flex-basis var(--t);
}
.brand{display:flex;align-items:center;gap:10px;padding:6px 8px 18px;min-height:56px}
.brand-mark{width:36px;height:36px;flex:0 0 36px;border-radius:10px;background:var(--c-primary);display:flex;align-items:center;justify-content:center}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.15;overflow:hidden;white-space:nowrap}
.brand-name{font-size:17px;font-weight:600;letter-spacing:.02em}
.brand-sub{font-size:12px;color:var(--c-text-3);letter-spacing:.06em}
.nav-group{display:flex;flex-direction:column;gap:4px;margin-top:4px}
.nav-title{font-size:12px;color:var(--c-text-3);padding:12px 12px 6px;letter-spacing:.08em}
.nav-item{
  display:flex;align-items:center;gap:12px;height:40px;padding:0 12px;border-radius:8px;
  color:var(--c-text-2);font-size:15px;position:relative;transition:background var(--t),color var(--t);
}
.nav-item svg{width:18px;height:18px;flex:0 0 18px;stroke:currentColor;fill:none;stroke-width:1.6}
.nav-item:hover{background:var(--c-bg);color:var(--c-text)}
.nav-item.is-active{background:var(--c-primary-soft);color:var(--c-primary-dark);font-weight:600}
.nav-item.is-active::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:0 3px 3px 0;background:var(--c-primary)}
.side-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px}
.side-card{
  background:var(--c-primary-soft);border-radius:12px;padding:16px;border:1px solid #D6E6F3;
}
.side-card p{font-size:13px;line-height:20px;color:var(--c-primary-dark);margin-bottom:10px}
.side-card .btn{width:100%;justify-content:center}
.side-note{font-size:12px;color:var(--c-text-3);padding:0 8px;line-height:18px}
.collapse-btn{
  display:flex;align-items:center;justify-content:center;gap:8px;height:36px;border-radius:8px;
  border:1px solid var(--c-line);background:#fff;color:var(--c-text-2);font-size:13px;cursor:pointer;transition:var(--t);
}
.collapse-btn:hover{background:var(--c-bg);color:var(--c-text)}
body.is-collapsed .sidebar{width:72px;flex-basis:72px;padding-left:10px;padding-right:10px}
body.is-collapsed .brand-text,
body.is-collapsed .nav-title,
body.is-collapsed .nav-label,
body.is-collapsed .side-card,
body.is-collapsed .side-note,
body.is-collapsed .collapse-text{display:none}
body.is-collapsed .nav-item{justify-content:center;padding:0}
body.is-collapsed .brand{justify-content:center;padding-left:0;padding-right:0}

.page{flex:1;min-width:0;display:flex;flex-direction:column}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
main{flex:1}
.section{padding:96px 0}
.section-tight{padding:64px 0}
.section-alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-head{max-width:760px;margin-bottom:48px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.08em;color:var(--c-primary);
  background:var(--c-primary-soft);border-radius:var(--r-pill);padding:5px 14px;margin-bottom:18px;
}
.h1{font-size:40px;line-height:48px;letter-spacing:-.01em}
.h2{font-size:28px;line-height:38px}
.h3{font-size:20px;line-height:30px}
.lead{font-size:16px;line-height:28px;color:var(--c-text-2)}
.small{font-size:13px;line-height:20px;color:var(--c-text-3)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:40px;padding:0 20px;
  border-radius:var(--r-btn);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  white-space:nowrap;
}
.btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.8}
.btn-sm{height:32px;padding:0 14px;font-size:13px}
.btn-lg{height:48px;padding:0 26px;font-size:16px}
.btn-primary{background:var(--c-accent);color:#fff}
.btn-primary:hover{background:var(--c-accent-hover);transform:translateY(-1px);box-shadow:0 10px 22px rgba(233,138,43,.24)}
.btn-ghost{background:#fff;border-color:var(--c-primary);color:var(--c-primary)}
.btn-ghost:hover{background:var(--c-primary-soft);transform:translateY(-1px)}
.btn-quiet{background:#fff;border-color:var(--c-line);color:var(--c-text-2)}
.btn-quiet:hover{border-color:var(--c-primary);color:var(--c-primary)}
.btn-link{height:auto;padding:0;border:none;background:none;color:var(--c-primary);border-bottom:1px solid transparent;border-radius:0}
.btn-link:hover{border-bottom-color:var(--c-primary)}
.btn:active{transform:translateY(0)}

/* ---------- Pills & badges ---------- */
.pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.pill{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:13px;line-height:1;background:#fff;border:1px solid var(--c-line);color:var(--c-text-2);
}
.pill-soft{background:var(--c-primary-soft);border-color:transparent;color:var(--c-primary-dark)}
.pill-accent{background:var(--c-accent-soft);border-color:transparent;color:#A85F14}
.pill-ok{background:#E9F5F1;border-color:transparent;color:#1F7A5F}

/* ---------- Hero ---------- */
.hero{padding:72px 0 64px;background:#fff;border-bottom:1px solid var(--c-line)}
.hero-inner{display:grid;grid-template-columns:1fr 1.05fr;gap:64px;align-items:center}
.hero-sub{font-size:17px;line-height:30px;color:var(--c-text-2);margin-top:20px;max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-visual{position:relative}
.hero-back{
  position:absolute;inset:auto -12px -18px 28px;height:74%;border-radius:18px;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;opacity:.9;
}
.hero-back::after{content:"";position:absolute;inset:0;border-radius:18px;background:rgba(30,107,168,.10)}
.hero-shot{
  position:relative;border-radius:16px;overflow:hidden;background:#fff;border:1px solid var(--c-line);
  box-shadow:0 18px 48px rgba(27,42,54,.14);
}
.hero-shot img{width:100%;aspect-ratio:16/10;object-fit:cover}
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:56px;padding-top:32px;border-top:1px solid var(--c-line);
}
.stat-num{font-size:26px;line-height:32px;font-weight:600;color:var(--c-primary-dark);font-variant-numeric:tabular-nums}
.stat-label{font-size:13px;line-height:20px;color:var(--c-text-3);margin-top:4px}

/* ---------- Feature rows ---------- */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:44px 0}
.feature-row + .feature-row{border-top:1px solid var(--c-line)}
.feature-row.is-reverse .feature-media{order:2}
.feature-num{
  font-size:13px;letter-spacing:.14em;color:var(--c-primary);font-weight:600;
  font-variant-numeric:tabular-nums;display:inline-block;margin-bottom:12px;
}
.feature-row h3{margin-bottom:12px}
.feature-row p{color:var(--c-text-2);margin-bottom:16px}
.feature-media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line);background:#fff}
.feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.feature-list{display:flex;flex-direction:column;gap:10px;margin:0 0 18px}
.feature-list li{display:flex;gap:10px;font-size:15px;color:var(--c-text-2)}
.feature-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-primary);margin-top:11px;flex:0 0 6px}

/* ---------- Carousel ---------- */
.carousel-wrap{position:relative}
.shots{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 2px 18px;
  scrollbar-width:none;-ms-overflow-style:none;
}
.shots::-webkit-scrollbar{display:none}
.shot{flex:0 0 calc(50% - 10px);scroll-snap-align:start}
.shot figure{margin:0;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card)}
.shot img{width:100%;aspect-ratio:16/10;object-fit:cover}
.shot figcaption{font-size:13px;line-height:22px;color:var(--c-text-2);padding:12px 18px;border-top:1px solid var(--c-line)}
.carousel-nav{display:flex;align-items:center;justify-content:space-between;margin-top:8px}
.carousel-arrows{display:flex;gap:10px}
.arrow-btn{
  width:36px;height:36px;border-radius:50%;border:1px solid var(--c-primary);background:#fff;color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--t);
}
.arrow-btn:hover{background:var(--c-primary-soft)}
.arrow-btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2}
.dots{display:flex;gap:8px}
.dot{width:8px;height:8px;border-radius:50%;background:#CFDBE5;border:none;padding:0;cursor:pointer;transition:var(--t)}
.dot.is-on{background:var(--c-primary);width:22px;border-radius:var(--r-pill)}

/* ---------- Platform cards ---------- */
.platform-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(212px,1fr));gap:20px}
.platform-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:24px;transition:var(--t)}
.platform-card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover)}
.platform-card h3{font-size:17px;margin-bottom:6px;display:flex;align-items:center;gap:10px}
.platform-card .small{margin-bottom:14px}
.platform-card ul{display:flex;flex-direction:column;gap:8px}
.platform-card li{font-size:14px;color:var(--c-text-2);display:flex;gap:8px}
.platform-card li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--c-primary);margin-top:10px;flex:0 0 5px}
.icon-chip{
  width:32px;height:32px;border-radius:9px;background:var(--c-primary-soft);display:flex;align-items:center;justify-content:center;
}
.icon-chip svg{width:17px;height:17px;stroke:var(--c-primary);fill:none;stroke-width:1.7}

/* ---------- Testimonials ---------- */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start}
.quote-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-card);transition:var(--t)}
.quote-card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover)}
.quote-mark{font-size:30px;line-height:1;color:var(--c-primary);font-weight:600}
.quote-card p{color:var(--c-text-2);font-size:15px;line-height:26px;margin:10px 0 18px}
.quote-who{display:flex;align-items:center;gap:12px;padding-top:16px;border-top:1px solid var(--c-line)}
.avatar{width:40px;height:40px;border-radius:50%;flex:0 0 40px;object-fit:cover;background:var(--c-primary-soft)}
.who-name{font-size:14px;font-weight:600}
.who-role{font-size:12px;color:var(--c-text-3)}
.stars{display:flex;gap:2px;margin-left:auto}
.stars svg{width:14px;height:14px;fill:var(--c-accent)}

/* ---------- Posts (CMS) ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:24px;display:flex;flex-direction:column;transition:var(--t)}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover)}
.post-title{font-size:17px;line-height:26px;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.post-sum{font-size:14px;line-height:24px;color:var(--c-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:18px}
.post-meta{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--c-text-3);border-top:1px solid var(--c-line);padding-top:14px}
.post-meta .arrow{margin-left:auto;color:var(--c-primary);font-weight:600;transition:transform var(--t)}
.post-card:hover .post-meta .arrow{transform:translateX(4px)}
.empty-state{
  border:1px dashed #C9D8E4;border-radius:var(--r-card);padding:44px 24px;text-align:center;background:#fff;
}
.empty-state p{color:var(--c-text-2);margin-bottom:16px}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden}
.faq-q{
  width:100%;min-height:52px;display:flex;align-items:center;gap:16px;padding:12px 22px;background:none;border:none;
  text-align:left;font-size:16px;font-weight:600;color:var(--c-text);cursor:pointer;transition:background var(--t);
}
.faq-q:hover{background:var(--c-bg)}
.faq-sign{margin-left:auto;width:22px;height:22px;flex:0 0 22px;position:relative;transition:transform 200ms ease}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:var(--c-primary);border-radius:2px}
.faq-sign::before{left:0;right:0;top:10px;height:2px}
.faq-sign::after{top:0;bottom:0;left:10px;width:2px;transition:opacity 200ms ease}
.faq-item.is-open .faq-sign{transform:rotate(180deg)}
.faq-item.is-open .faq-sign::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height 240ms ease}
.faq-a p{padding:0 22px 20px;font-size:15px;line-height:27px;color:var(--c-text-2)}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--c-primary-soft);border:1px solid #D6E6F3;border-radius:18px;padding:40px;
  display:flex;align-items:center;gap:32px;justify-content:space-between;
}
.cta-band h2{font-size:24px;line-height:34px;margin-bottom:8px}
.cta-band p{color:var(--c-primary-dark)}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta-foot{margin-top:18px;font-size:13px;color:var(--c-text-3)}

/* ---------- Category entries ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cat-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:22px;display:flex;flex-direction:column;
  gap:10px;transition:var(--t);
}
.cat-card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover);border-color:#CFE1EF}
.cat-card h3{font-size:16px}
.cat-card p{font-size:14px;line-height:24px;color:var(--c-text-2)}
.cat-card .btn-link{margin-top:auto;align-self:flex-start;font-size:14px}

/* ---------- Footer ---------- */
.site-footer{background:#F1F4F7;border-top:1px solid var(--c-line);margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:var(--c-primary)}
.footer-desc{font-size:14px;line-height:24px;color:var(--c-text-2);max-width:300px}
.footer-col h4{font-size:14px;margin-bottom:16px;color:var(--c-text)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--c-text-2);transition:color var(--t)}
.footer-col a:hover{color:var(--c-primary)}
.footer-form label{display:block;font-size:13px;color:var(--c-text-2);margin-bottom:8px}
.footer-form .field{display:flex;gap:10px}
.footer-form input{
  flex:1;height:44px;border-radius:var(--r-btn);border:1px solid var(--c-line);padding:0 14px;font-size:14px;
  font-family:inherit;background:#fff;transition:var(--t);
}
.footer-form input:focus{outline:none;border-color:var(--c-primary);background:#FBFDFF;box-shadow:0 0 0 3px rgba(30,107,168,.12)}
.footer-bottom{
  border-top:1px solid var(--c-line);padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--c-text-3);
}
.footer-bottom a:hover{color:var(--c-primary)}

/* ---------- Mobile topbar & drawer ---------- */
.mobile-topbar{display:none}
.drawer-mask{position:fixed;inset:0;background:rgba(27,42,54,.45);opacity:0;pointer-events:none;transition:opacity 200ms ease;z-index:70}

@media (max-width:1279px){
  .container{padding:0 28px}
  .hero-inner{gap:44px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .hero{padding:40px 0 48px}
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .h1{font-size:34px;line-height:44px}
  .feature-row{grid-template-columns:1fr;gap:28px;padding:32px 0}
  .feature-row.is-reverse .feature-media{order:0}
  .quote-grid{grid-template-columns:repeat(2,1fr)}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr);gap:20px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px}

  .mobile-topbar{
    display:flex;align-items:center;gap:12px;position:fixed;top:0;left:0;right:0;height:56px;padding:0 14px;
    background:#fff;border-bottom:1px solid var(--c-line);z-index:90;
  }
  .mobile-topbar .tb-title{font-size:16px;font-weight:600;margin-right:auto}
  .tb-btn{
    width:44px;height:40px;display:flex;align-items:center;justify-content:center;border:none;background:none;
    color:var(--c-text);cursor:pointer;border-radius:8px;transition:var(--t);
  }
  .tb-btn:hover{background:var(--c-bg)}
  .tb-btn svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8}
  .sidebar{
    position:fixed;top:0;bottom:0;left:0;width:272px;flex-basis:272px;height:100vh;
    transform:translateX(-100%);transition:transform 220ms ease;box-shadow:0 12px 40px rgba(27,42,54,.16);
    overflow-y:auto;
  }
  body.drawer-open .sidebar{transform:translateX(0)}
  body.drawer-open .drawer-mask{opacity:1;pointer-events:auto}
  body.is-collapsed .sidebar{width:272px;flex-basis:272px}
  body.is-collapsed .brand-text,
  body.is-collapsed .nav-title,
  body.is-collapsed .nav-label,
  body.is-collapsed .side-card,
  body.is-collapsed .side-note,
  body.is-collapsed .collapse-text{display:flex}
  body.is-collapsed .side-card{display:block}
  body.is-collapsed .nav-item{justify-content:flex-start;padding:0 12px}
  .collapse-btn{display:none}
  .page{padding-top:56px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .h1{font-size:28px;line-height:36px}
  .h2{font-size:23px;line-height:32px}
  .quote-grid{grid-template-columns:1fr}
  .post-grid{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .shot{flex:0 0 88vw}
  .platform-grid{grid-template-columns:1fr}
}
@media (max-width:520px){
  .section{padding:56px 0}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .stats{grid-template-columns:1fr 1fr}
  .footer-form .field{flex-direction:column}
  .footer-form input{width:100%}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
}

/* roulang page: article */
:root{
  --c-primary:#1E6BA8;
  --c-primary-dark:#14507F;
  --c-primary-light:#E8F1F8;
  --c-accent:#E98A2B;
  --c-accent-dark:#CF7519;
  --c-accent-light:#FDF3E6;
  --c-success:#2E9E7E;
  --c-warn:#C4543F;
  --c-text:#1B2A36;
  --c-text-2:#5A6C7A;
  --c-text-3:#8B9AA6;
  --c-line:#E3E9EF;
  --c-bg:#F6F8FA;
  --c-card:#FFFFFF;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(27,42,54,.04), 0 8px 24px rgba(27,42,54,.06);
  --sh-card-hover:0 12px 32px rgba(27,42,54,.10);
  --sidebar-w:240px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:28px;
  color:var(--c-text);
  background:var(--c-bg);
}
img{max-width:100%;display:block}
a{color:inherit}
button,input{font-family:inherit}
button{cursor:pointer}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding-left:0;list-style:none}

:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}

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

/* ---------- App shell ---------- */
.shell{min-height:100vh}

.sidebar{
  position:fixed;
  top:0;bottom:0;left:0;
  width:var(--sidebar-w);
  background:#fff;
  border-right:1px solid var(--c-line);
  display:flex;
  flex-direction:column;
  padding:20px 16px 14px;
  overflow-y:auto;
  z-index:60;
  transition:width .2s ease, transform .22s ease;
}
.sidebar-head{padding:0 4px 18px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;padding:4px;border-radius:10px}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand-mark svg{width:20px;height:20px;fill:none;stroke:#fff;stroke-width:1.5}
.brand-name{display:block;font-size:16px;font-weight:600;line-height:20px;color:var(--c-text)}
.brand-sub{display:block;font-size:12px;line-height:16px;color:var(--c-text-3)}

.nav-group{display:flex;flex-direction:column;gap:4px}
.nav-title{
  font-size:12px;letter-spacing:.08em;color:var(--c-text-3);
  padding:6px 12px 8px;text-transform:none;
}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:12px;
  height:40px;padding:0 12px;
  border-radius:8px;
  font-size:14px;color:var(--c-text-2);
  text-decoration:none;
  transition:background .18s ease,color .18s ease;
}
.nav-item svg{width:18px;height:18px;flex:0 0 auto;fill:none;stroke:currentColor;stroke-width:1.6}
.nav-item:hover{background:#F1F4F7;color:var(--c-text)}
.nav-item.is-active{background:var(--c-primary-light);color:var(--c-primary-dark);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  border-radius:2px;background:var(--c-primary);
}

.sidebar-foot{margin-top:auto;padding-top:18px}
.mini-download{
  border:1px solid var(--c-line);
  background:var(--c-primary-light);
  border-radius:var(--r-card);
  padding:16px;
}
.mini-download p{font-size:13px;line-height:20px;color:var(--c-text-2);margin:0 0 12px}
.sidebar-copy{font-size:12px;line-height:18px;color:var(--c-text-3);padding:12px 4px 0}

.collapse-btn{
  margin-top:10px;
  display:flex;align-items:center;justify-content:center;gap:8px;
  height:36px;width:100%;
  border:1px solid var(--c-line);background:#fff;color:var(--c-text-2);
  border-radius:8px;font-size:13px;transition:background .18s ease,color .18s ease;
}
.collapse-btn:hover{background:#F1F4F7;color:var(--c-text)}
.collapse-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.6;transition:transform .2s ease}

body.collapsed{--sidebar-w:72px}
body.collapsed .brand-text,
body.collapsed .nav-label,
body.collapsed .nav-title,
body.collapsed .mini-download p,
body.collapsed .sidebar-copy,
body.collapsed .collapse-text{display:none}
body.collapsed .sidebar{padding-left:12px;padding-right:12px;align-items:center}
body.collapsed .nav-item{justify-content:center;padding:0}
body.collapsed .collapse-btn svg{transform:rotate(180deg)}

.main{
  margin-left:var(--sidebar-w);
  min-height:100vh;
  display:flex;
  flex-direction:column;
  transition:margin-left .2s ease;
}

/* ---------- mobile topbar ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  height:56px;padding:0 14px;
  background:#fff;border-bottom:1px solid var(--c-line);
}
.icon-btn{
  width:40px;height:40px;flex:0 0 auto;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--c-line);background:#fff;border-radius:10px;color:var(--c-text-2);
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.icon-btn:hover{background:#F1F4F7;color:var(--c-text)}
.icon-btn svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6}
.icon-btn--accent{background:var(--c-accent);border-color:var(--c-accent);color:#fff}
.icon-btn--accent:hover{background:var(--c-accent-dark);border-color:var(--c-accent-dark);color:#fff}
.brand--top{gap:8px;padding:0}
.brand--top .brand-mark{width:30px;height:30px;border-radius:9px}
.brand--top .brand-name{font-size:15px;line-height:30px}

.drawer-mask{
  position:fixed;inset:0;z-index:55;
  background:rgba(27,42,54,.42);
  border:0;
}

/* ---------- content ---------- */
.content{flex:1 0 auto;padding:32px 0 88px}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;line-height:20px;color:var(--c-text-3);
  margin-bottom:24px;
}
.breadcrumb a{color:var(--c-text-3);text-decoration:none}
.breadcrumb a:hover{color:var(--c-primary);text-decoration:underline}
.breadcrumb .sep{color:#C3CDD6}
.breadcrumb .current{color:var(--c-text);font-weight:600}

.pill{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;
  border-radius:var(--r-pill);
  font-size:13px;line-height:26px;font-weight:400;
}
.pill-soft{background:var(--c-primary-light);color:var(--c-primary-dark)}
.pill-accent{background:var(--c-accent-light);color:var(--c-accent-dark)}
.pill-outline{border:1px solid var(--c-line);color:var(--c-text-2);background:#fff}

.article-head{border-bottom:1px solid var(--c-line);padding-bottom:24px;margin-bottom:32px}
.article-title{
  font-size:28px;line-height:36px;font-weight:600;
  color:var(--c-primary-dark);
  margin:14px 0 16px;
  letter-spacing:.01em;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;font-size:13px;line-height:20px;color:var(--c-text-3)}
.meta-row .meta-item{display:inline-flex;align-items:center;gap:6px}
.meta-row time{color:var(--c-text-2)}

.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px}
.article-main{min-width:0;max-width:760px}

.article-body{font-size:17px;line-height:30px;color:var(--c-text);overflow-wrap:break-word}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 18px}
.article-body h2{
  font-size:26px;line-height:38px;font-weight:600;color:var(--c-primary-dark);
  margin:40px 0 16px;scroll-margin-top:80px;
}
.article-body h3{
  font-size:20px;line-height:30px;font-weight:600;color:var(--c-text);
  margin:28px 0 12px;scroll-margin-top:80px;
}
.article-body h4{font-size:17px;line-height:28px;font-weight:600;margin:22px 0 10px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:24px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:8px}
.article-body li::marker{color:var(--c-primary)}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;
  border-left:3px solid var(--c-primary);
  background:var(--c-primary-light);
  border-radius:0 12px 12px 0;
  color:var(--c-text-2);font-size:16px;line-height:28px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:24px auto}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;line-height:20px;color:var(--c-text-3);text-align:center;margin-top:10px}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--c-primary-dark)}
.article-body pre{
  background:#F1F4F7;border:1px solid var(--c-line);border-radius:12px;
  padding:16px;overflow-x:auto;font-size:14px;line-height:24px;margin:20px 0;
}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;background:#F1F4F7;border-radius:6px;padding:2px 6px;
}
.article-body pre code{background:none;padding:0}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--c-line);padding:10px 14px;text-align:left}
.article-body th{background:#F1F4F7;font-weight:600}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:32px 0}

.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:40px 0 0;padding-top:24px;border-top:1px solid var(--c-line)}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;
  border-radius:var(--r-pill);background:#fff;border:1px solid var(--c-line);
  font-size:13px;color:var(--c-text-2);text-decoration:none;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.tag:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-light)}

.share-row{display:flex;align-items:center;gap:12px;margin-top:24px;flex-wrap:wrap}
.share-btn{
  display:inline-flex;align-items:center;gap:8px;
  height:38px;padding:0 16px;border-radius:var(--r-btn);
  border:1px solid var(--c-line);background:#fff;color:var(--c-text-2);font-size:14px;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.share-btn:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-light)}
.share-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.6}
.share-tip{font-size:13px;color:var(--c-success)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 18px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;text-decoration:none;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--c-accent);color:#fff}
.btn-primary:hover{background:var(--c-accent-dark)}
.btn-secondary{background:#fff;color:var(--c-primary);border-color:var(--c-primary)}
.btn-secondary:hover{background:var(--c-primary-light)}
.btn-sm{height:32px;padding:0 14px;font-size:13px}
.btn-lg{height:48px;padding:0 24px;font-size:16px}

.post-nav{display:grid;grid-template-columns:1fr;gap:16px;margin-top:48px}
.post-nav-card{
  display:block;text-decoration:none;background:#fff;
  border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:20px 24px;transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.post-nav-card:hover{box-shadow:var(--sh-card-hover);transform:translateY(-2px);border-color:#D5DEE6}
.post-nav-card .label{font-size:13px;color:var(--c-text-3);display:block;margin-bottom:6px}
.post-nav-card .title{font-size:16px;font-weight:600;color:var(--c-text);display:block;margin-bottom:6px}
.post-nav-card .desc{font-size:13px;line-height:20px;color:var(--c-text-2)}

.section-block{margin-top:64px}
.section-title{font-size:22px;line-height:32px;font-weight:600;color:var(--c-text);margin-bottom:20px}
.card-grid{display:grid;grid-template-columns:1fr;gap:20px}
.content-card{
  display:flex;flex-direction:column;text-decoration:none;background:#fff;
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-card);
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.content-card:hover{box-shadow:var(--sh-card-hover);transform:translateY(-2px)}
.thumb{aspect-ratio:16/10;background:var(--c-primary-light);overflow:hidden}
.thumb img{width:100%;height:100%;object-fit:cover}
.card-body{padding:20px}
.card-body h3{font-size:16px;line-height:26px;font-weight:600;margin:10px 0 8px;color:var(--c-text)}
.card-body p{font-size:14px;line-height:24px;color:var(--c-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

.back-block{
  margin-top:48px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;
  background:var(--c-primary-light);border-radius:var(--r-card);padding:24px;
}
.back-block p{font-size:15px;color:var(--c-text-2);margin:0;flex:1 1 240px}

.empty-state{
  background:#fff;border:1px dashed #C8D5DF;border-radius:var(--r-card);
  padding:56px 24px;text-align:center;
}
.empty-state h2{font-size:20px;line-height:30px;font-weight:600;color:var(--c-text);margin-bottom:10px}
.empty-state p{font-size:15px;color:var(--c-text-2);margin-bottom:22px}

/* ---------- TOC ---------- */
.toc{display:none}
.toc-inner{position:sticky;top:32px}
.toc h2{font-size:13px;letter-spacing:.08em;color:var(--c-text-3);margin-bottom:12px}
.toc-list{display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--c-line)}
.toc-link{
  display:block;padding:6px 0 6px 14px;margin-left:-1px;
  border-left:2px solid transparent;
  font-size:13px;line-height:20px;color:var(--c-text-2);text-decoration:none;
  transition:color .18s ease,border-color .18s ease;
}
.toc-link:hover{color:var(--c-primary-dark)}
.toc-link.is-sub{padding-left:26px;color:var(--c-text-3)}
.toc-link.is-current{color:var(--c-primary-dark);border-left-color:var(--c-primary);font-weight:600}

/* ---------- footer ---------- */
.site-footer{
  background:#F1F4F7;border-top:1px solid var(--c-line);
  padding:56px 0 28px;margin-top:auto;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-desc{font-size:14px;line-height:24px;color:var(--c-text-2);margin-top:16px;max-width:420px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--c-text);margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--c-text-2);text-decoration:none;transition:color .18s ease}
.footer-col a:hover{color:var(--c-primary);text-decoration:underline}
.footer-form label{display:block;font-size:13px;line-height:20px;color:var(--c-text-2);margin-bottom:10px}
.footer-form .field{display:flex;flex-direction:column;gap:10px}
.footer-form input{
  height:44px;padding:0 14px;border:1px solid var(--c-line);border-radius:var(--r-btn);
  background:#fff;font-size:14px;color:var(--c-text);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.footer-form input::placeholder{color:var(--c-text-3)}
.footer-form input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(30,107,168,.12)}
.small{font-size:13px;line-height:20px;color:var(--c-text-3)}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;align-items:center;
}
.footer-bottom ul{display:flex;flex-wrap:wrap;gap:16px}
.footer-bottom a{font-size:13px;color:var(--c-text-3);text-decoration:none}
.footer-bottom a:hover{color:var(--c-primary)}

/* ---------- responsive ---------- */
@media (min-width:640px){
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .post-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-form .field{flex-direction:row;align-items:center}
  .footer-form input{flex:1 1 auto}
}
@media (min-width:768px){
  .article-title{font-size:38px;line-height:48px}
  .article-head{padding-bottom:28px;margin-bottom:36px}
}
@media (min-width:1024px){
  .topbar{display:none}
  .drawer-mask{display:none !important}
  .content{padding:44px 0 96px}
  .card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.6fr;gap:40px}
}
@media (min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,760px) 220px;justify-content:center;gap:56px}
  .toc{display:block}
}
@media (max-width:1023.98px){
  .sidebar{
    width:264px;
    transform:translateX(-100%);
    box-shadow:0 12px 40px rgba(27,42,54,.14);
  }
  body.drawer-open .sidebar{transform:translateX(0)}
  .main{margin-left:0}
  .collapse-btn{display:none}
  .sidebar-foot{margin-top:24px}
  body.drawer-open{overflow:hidden}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .article-body{font-size:16px;line-height:29px}
  .article-body h2{font-size:22px;line-height:32px;margin-top:34px}
  .article-body h3{font-size:18px;line-height:28px}
  .back-block{padding:20px}
}

/* roulang page: category1 */
:root{
  --c-primary:#1E6BA8;
  --c-primary-dark:#14507F;
  --c-primary-light:#E8F1F8;
  --c-accent:#E98A2B;
  --c-accent-dark:#CF7519;
  --c-accent-light:#FDF3E6;
  --c-success:#2E9E7E;
  --c-warn:#C4543F;
  --c-text:#1B2A36;
  --c-text-2:#5A6C7A;
  --c-text-3:#8B9AA6;
  --c-line:#E3E9EF;
  --c-bg:#F6F8FA;
  --c-card:#FFFFFF;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(27,42,54,.04), 0 8px 24px rgba(27,42,54,.06);
  --sh-hover:0 12px 32px rgba(27,42,54,.10);
  --sidebar-w:240px;
  --sidebar-wc:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC','Inter',system-ui,sans-serif;
  font-size:16px;
  line-height:28px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--c-primary);text-decoration:none}
a:hover{color:var(--c-primary-dark)}
h1,h2,h3,h4{margin:0;color:var(--c-text);font-weight:600}
h1{font-size:40px;line-height:48px}
h2{font-size:28px;line-height:38px}
h3{font-size:20px;line-height:30px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- App Shell ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:#fff;border-right:1px solid var(--c-line);
  display:flex;flex-direction:column;z-index:70;
  transition:width .2s ease, transform .22s ease;
}
.sidebar-head{padding:20px 16px 12px;border-bottom:1px solid var(--c-line)}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;
  background:var(--c-primary);display:flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:22px;height:22px}
.brand-name{display:block;font-size:16px;font-weight:600;line-height:1.2;color:var(--c-text)}
.brand-sub{display:block;font-size:12px;line-height:1.5;color:var(--c-text-3)}
.sidebar-scroll{flex:1 1 auto;overflow-y:auto;padding:16px 12px}
.nav-title{display:block;font-size:12px;letter-spacing:.08em;color:var(--c-text-3);padding:0 12px 8px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;
  height:40px;padding:0 12px;margin-bottom:4px;border-radius:8px;
  color:var(--c-text-2);font-size:14px;transition:background .18s ease,color .18s ease;
}
.nav-item svg{width:20px;height:20px;flex:0 0 20px;fill:none;stroke:currentColor;stroke-width:1.6}
.nav-item:hover{background:#F2F5F8;color:var(--c-text)}
.nav-item.is-active{background:var(--c-primary-light);color:var(--c-primary-dark);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--c-primary);
}
.sidebar-foot{padding:12px;border-top:1px solid var(--c-line)}
.side-card{background:var(--c-primary-light);border-radius:12px;padding:14px;margin-bottom:10px}
.side-card-title{font-size:13px;font-weight:600;color:var(--c-primary-dark)}
.side-card-desc{font-size:12px;color:var(--c-text-2);margin:4px 0 10px}
.collapse-btn{
  display:flex;align-items:center;justify-content:center;gap:8px;
  width:100%;height:36px;border:1px solid var(--c-line);border-radius:8px;
  background:#fff;color:var(--c-text-2);font-size:13px;cursor:pointer;
  transition:background .18s ease,color .18s ease;
}
.collapse-btn:hover{background:#F2F5F8;color:var(--c-text)}
.collapse-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;transition:transform .2s ease}
.sidebar-copy{font-size:12px;color:var(--c-text-3);text-align:center;margin-top:10px}
body.nav-collapsed .sidebar{width:var(--sidebar-wc)}
body.nav-collapsed .nav-label,
body.nav-collapsed .nav-title,
body.nav-collapsed .brand-text,
body.nav-collapsed .side-card,
body.nav-collapsed .sidebar-copy{display:none}
body.nav-collapsed .nav-item{justify-content:center;padding:0}
body.nav-collapsed .sidebar-head{padding:20px 8px 12px}
body.nav-collapsed .brand{justify-content:center}
body.nav-collapsed .collapse-btn svg{transform:rotate(180deg)}

.main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;transition:margin-left .2s ease}
body.nav-collapsed .main{margin-left:var(--sidebar-wc)}

.mobile-bar{display:none}
.drawer-mask{display:none}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 18px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:14px;font-weight:600;line-height:1;cursor:pointer;white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn-lg{height:48px;padding:0 24px;font-size:15px}
.btn-sm{height:32px;padding:0 14px;font-size:13px}
.btn-primary{background:var(--c-accent);color:#fff}
.btn-primary:hover{background:var(--c-accent-dark);color:#fff;transform:translateY(-1px)}
.btn-outline{background:#fff;color:var(--c-primary);border-color:var(--c-primary)}
.btn-outline:hover{background:var(--c-primary-light);color:var(--c-primary-dark)}
.btn-ghost{background:transparent;color:var(--c-primary);padding:0;height:auto;border:0}
.btn-ghost:hover{color:var(--c-primary-dark);text-decoration:underline;text-underline-offset:5px}
.pill{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;line-height:1;
  background:var(--c-primary-light);color:var(--c-primary-dark);
}
.pill-amber{background:var(--c-accent-light);color:var(--c-accent-dark)}
.pill-line{background:#fff;border:1px solid var(--c-line);color:var(--c-text-2)}
.card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);transition:box-shadow .18s ease,transform .18s ease;
}
.card:hover{box-shadow:var(--sh-hover);transform:translateY(-2px)}
.section{padding:72px 0}
.section-tight{padding:48px 0}
.section-head{max-width:720px;margin-bottom:32px}
.section-head p{color:var(--c-text-2);margin-top:10px}
.eyebrow{font-size:13px;letter-spacing:.08em;color:var(--c-primary);font-weight:600}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;line-height:20px;color:var(--c-text-3);padding:24px 0 0}
.breadcrumb a{color:var(--c-text-3)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:var(--c-line)}
.breadcrumb .now{color:var(--c-text);font-weight:600}
.small{font-size:13px;line-height:20px;color:var(--c-text-3)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:40px 0 56px}
.hero-bg{position:absolute;inset:0;z-index:0;overflow:hidden}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.34;border-radius:0}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(246,248,250,.72),rgba(246,248,250,.96))}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center}
.hero h1{margin:14px 0 16px}
.hero-lead{font-size:17px;line-height:30px;color:var(--c-text-2);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.hero-visual{position:relative}
.hero-visual .frame{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line);
  background:#fff;box-shadow:var(--sh-card);aspect-ratio:16/10;
}
.hero-visual .frame img{width:100%;height:100%;object-fit:cover;border-radius:0}
.hero-note{
  position:absolute;left:20px;bottom:-18px;background:#fff;border:1px solid var(--c-line);
  border-radius:12px;padding:12px 16px;box-shadow:var(--sh-card);
}
.hero-note strong{display:block;font-size:15px;font-weight:600}
.hero-note span{font-size:12px;color:var(--c-text-3)}

/* ---------- 准备事项 ---------- */
.prepare-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:20px}
.prepare-card{padding:24px}
.prepare-card .num{font-size:13px;font-weight:600;color:var(--c-primary);letter-spacing:.06em}
.prepare-card h3{margin:8px 0 8px;font-size:17px;line-height:26px}
.prepare-card p{font-size:14px;line-height:24px;color:var(--c-text-2)}
.prepare-card.is-lead{background:var(--c-primary-light);border-color:#D3E3EF}

/* ---------- 时间轴步骤 ---------- */
.timeline{margin-top:8px}
.tl-item{display:grid;grid-template-columns:64px minmax(0,1fr);gap:24px;position:relative;padding-bottom:44px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:31px;top:66px;bottom:6px;width:1px;background:var(--c-line)}
.tl-item:last-child::before{display:none}
.tl-num{
  width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--c-primary-light);color:var(--c-primary-dark);font-size:18px;font-weight:600;
  border:1px solid #D3E3EF;position:relative;z-index:1;
}
.tl-body{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-card)}
.tl-body h3{margin-bottom:10px}
.tl-body > p{color:var(--c-text-2);font-size:15px;line-height:27px}
.tip-list{margin-top:16px;display:grid;gap:10px}
.tip-list li{display:flex;gap:10px;font-size:14px;line-height:24px;color:var(--c-text-2)}
.tip-list li::before{
  content:"";flex:0 0 6px;width:6px;height:6px;border-radius:50%;
  background:var(--c-primary);margin-top:9px;
}
.tl-fig{margin-top:18px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--c-line);aspect-ratio:16/9}
.tl-fig img{width:100%;height:100%;object-fit:cover;border-radius:0}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}

/* ---------- 系统要求 ---------- */
.spec-wrap{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card)}
.spec-row{
  display:grid;grid-template-columns:200px minmax(0,1fr);gap:24px;align-items:center;
  min-height:52px;padding:10px 24px;border-bottom:1px solid var(--c-line);
}
.spec-row:last-child{border-bottom:0}
.spec-row:nth-child(odd){background:#FAFCFD}
.spec-key{font-size:14px;font-weight:600;color:var(--c-text)}
.spec-val{font-size:14px;line-height:24px;color:var(--c-text-2)}
.platform-strip{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;transition:box-shadow .18s ease}
.faq-item[open]{box-shadow:var(--sh-card)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:52px;padding:14px 24px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--c-text);
}
.faq-q::-webkit-details-marker{display:none}
.faq-q .mark{
  flex:0 0 24px;width:24px;height:24px;border-radius:50%;border:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:center;color:var(--c-primary);
  font-size:16px;line-height:1;transition:transform .2s ease,background .2s ease;
}
.faq-item[open] .faq-q .mark{transform:rotate(45deg);background:var(--c-primary-light)}
.faq-a{padding:0 24px 20px;font-size:15px;line-height:27px;color:var(--c-text-2);border-top:1px solid var(--c-line);padding-top:16px}

/* ---------- CTA ---------- */
.cta-band{background:var(--c-primary-light);border:1px solid #D3E3EF;border-radius:var(--r-card);padding:32px}
.cta-inner{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
.cta-inner h2{font-size:24px;line-height:34px}
.cta-inner p{color:var(--c-text-2);margin-top:8px;font-size:15px;line-height:26px;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-note{margin-top:18px;font-size:13px;color:var(--c-text-2)}

/* ---------- Footer ---------- */
.site-footer{background:#F1F4F7;border-top:1px solid var(--c-line);padding:56px 0 24px;margin-top:auto}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-desc{font-size:14px;line-height:24px;color:var(--c-text-2);max-width:340px}
.footer-col h4{font-size:14px;margin-bottom:14px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--c-text-2)}
.footer-col a:hover{color:var(--c-primary)}
.footer-form label{display:block;font-size:14px;color:var(--c-text-2);margin-bottom:10px}
.field{display:flex;flex-wrap:wrap;gap:8px}
.field input{
  flex:1 1 160px;min-width:0;height:44px;padding:0 14px;border-radius:var(--r-btn);
  border:1px solid var(--c-line);background:#fff;font-size:14px;color:var(--c-text);
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.field input::placeholder{color:var(--c-text-3)}
.field input:focus{outline:none;border-color:var(--c-primary);background:var(--c-primary-light);box-shadow:0 0 0 3px rgba(30,107,168,.12)}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--c-text-3);
}
.footer-bottom a{color:var(--c-text-3)}
.footer-bottom a:hover{color:var(--c-primary)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  h1{font-size:34px;line-height:44px}
  .hero-inner{gap:40px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
}
@media (max-width:1023px){
  .sidebar{width:280px;transform:translateX(-100%);box-shadow:0 12px 40px rgba(27,42,54,.16)}
  body.drawer-open .sidebar{transform:translateX(0)}
  body.nav-collapsed .sidebar{width:280px}
  body.nav-collapsed .nav-label,
  body.nav-collapsed .nav-title,
  body.nav-collapsed .brand-text,
  body.nav-collapsed .side-card,
  body.nav-collapsed .sidebar-copy{display:revert}
  body.nav-collapsed .nav-item{justify-content:flex-start;padding:0 12px}
  .main,body.nav-collapsed .main{margin-left:0;padding-top:56px}
  .collapse-btn{display:none}
  .mobile-bar{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    position:fixed;top:0;left:0;right:0;height:56px;padding:0 16px;
    background:#fff;border-bottom:1px solid var(--c-line);z-index:80;
  }
  .mobile-bar .icon-btn{
    width:44px;height:44px;display:flex;align-items:center;justify-content:center;
    border:0;background:transparent;color:var(--c-text);cursor:pointer;border-radius:10px;
  }
  .mobile-bar .icon-btn:hover{background:#F2F5F8}
  .mobile-bar svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8}
  .mobile-bar .brand-name{font-size:15px}
  .drawer-mask{
    display:block;position:fixed;inset:0;background:rgba(27,42,54,.36);
    opacity:0;pointer-events:none;transition:opacity .2s ease;z-index:65;
  }
  body.drawer-open .drawer-mask{opacity:1;pointer-events:auto}
  body.drawer-open{overflow:hidden}
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero{padding:32px 0 48px}
  .prepare-grid{grid-template-columns:1fr 1fr}
  .prepare-card.is-lead{grid-column:1 / -1}
  .section{padding:56px 0}
  .footer-grid{grid-template-columns:1fr 1fr}
  .spec-row{grid-template-columns:160px minmax(0,1fr);gap:16px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  h1{font-size:28px;line-height:36px}
  h2{font-size:22px;line-height:32px}
  h3{font-size:18px;line-height:28px}
  .hero-lead{font-size:16px;line-height:28px}
  .prepare-grid{grid-template-columns:1fr}
  .tl-item{grid-template-columns:44px minmax(0,1fr);gap:14px}
  .tl-num{width:44px;height:44px;font-size:15px}
  .tl-item::before{left:21px;top:48px}
  .tl-body{padding:20px}
  .spec-row{grid-template-columns:1fr;gap:4px;padding:14px 20px;min-height:auto;align-items:start}
  .faq-q{padding:12px 20px;font-size:15px;gap:12px}
  .faq-a{padding:14px 20px 18px}
  .cta-band{padding:24px 20px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr}
  .hero-note{position:static;margin-top:16px;box-shadow:none}
}

/* roulang page: category2 */
:root{
  --brand:#1E6BA8;
  --brand-dark:#14507F;
  --brand-light:#E8F1F8;
  --amber:#E98A2B;
  --amber-dark:#CF7519;
  --amber-light:#FDF3E6;
  --success:#2E9E7E;
  --warn:#C4543F;
  --text:#1B2A36;
  --text-2:#5A6C7A;
  --text-3:#8B9AA6;
  --line:#E3E9EF;
  --bg:#F6F8FA;
  --card:#FFFFFF;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 1px 2px rgba(27,42,54,.04), 0 8px 24px rgba(27,42,54,.06);
  --shadow-2:0 12px 32px rgba(27,42,54,.10);
  --sidebar-w:240px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:28px;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-dark)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:600;color:var(--text);letter-spacing:.01em}
h1{font-size:40px;line-height:48px}
h2{font-size:28px;line-height:38px}
h3{font-size:20px;line-height:30px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-light);color:var(--brand-dark)}

/* ---------- Shell ---------- */
.shell{display:flex;min-height:100vh}
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:#fff;
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  z-index:60;
  transition:width .2s ease, transform .22s ease;
}
.sidebar-head{
  padding:20px 18px 16px;
  border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:10px;
}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;
  border-radius:11px;
  background:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;min-width:0}
.brand-name{font-size:17px;line-height:22px;font-weight:600;color:var(--brand-dark);white-space:nowrap}
.brand-sub{font-size:12px;line-height:18px;color:var(--text-3);white-space:nowrap}
.side-scroll{flex:1;overflow-y:auto;padding:16px 12px}
.nav-group{display:flex;flex-direction:column;gap:4px}
.nav-title{
  display:block;
  font-size:12px;letter-spacing:.08em;color:var(--text-3);
  padding:8px 10px 6px;
}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:10px;
  min-height:40px;padding:8px 12px;
  border-radius:8px;
  color:var(--text-2);
  font-size:15px;
  transition:background .18s ease, color .18s ease;
}
.nav-item svg{width:18px;height:18px;flex:0 0 18px;stroke:currentColor;fill:none;stroke-width:1.6}
.nav-item:hover{background:#F1F5F8;color:var(--brand-dark)}
.nav-item.is-active{background:var(--brand-light);color:var(--brand-dark);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  border-radius:3px;background:var(--brand);
}
.side-foot{padding:14px 12px 16px;border-top:1px solid var(--line)}
.side-card{
  background:var(--brand-light);
  border-radius:12px;
  padding:14px;
}
.side-card strong{display:block;font-size:14px;line-height:22px;color:var(--brand-dark);font-weight:600}
.side-card p{font-size:12px;line-height:18px;color:var(--text-2);margin:4px 0 10px}
.side-card .btn{width:100%}
.side-copy{font-size:12px;line-height:18px;color:var(--text-3);margin-top:12px}
.collapse-btn{
  margin-top:10px;width:100%;
  display:flex;align-items:center;justify-content:center;gap:6px;
  min-height:34px;border:1px solid var(--line);background:#fff;
  border-radius:8px;color:var(--text-2);font-size:13px;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.collapse-btn:hover{background:#F1F5F8;color:var(--brand-dark);border-color:#CFDCE7}
.collapse-btn svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.8}

.main{
  flex:1;min-width:0;
  margin-left:var(--sidebar-w);
  display:flex;flex-direction:column;
  transition:margin-left .2s ease;
}
.container{width:100%;max-width:1120px;margin:0 auto;padding:0 32px}

/* collapsed */
.shell.is-collapsed .sidebar{width:72px}
.shell.is-collapsed .main{margin-left:72px}
.shell.is-collapsed .brand-text,
.shell.is-collapsed .brand-sub,
.shell.is-collapsed .nav-label,
.shell.is-collapsed .nav-title,
.shell.is-collapsed .side-card,
.shell.is-collapsed .side-copy,
.shell.is-collapsed .collapse-btn span{display:none}
.shell.is-collapsed .sidebar-head{justify-content:center;padding:20px 10px 16px}
.shell.is-collapsed .nav-item{justify-content:center;padding:8px}
.shell.is-collapsed .nav-item.is-active::before{left:0}

/* mobile topbar */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:56px;
  background:#fff;border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;
  padding:0 12px;z-index:70;
}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:#fff;border-radius:10px;cursor:pointer;color:var(--text-2);
}
.icon-btn:hover{background:#F1F5F8;color:var(--brand-dark)}
.icon-btn svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7}
.topbar .brand-mark{width:32px;height:32px;border-radius:9px}
.topbar .brand-mark svg{width:18px;height:18px}
.topbar-brand{display:flex;align-items:center;gap:8px;color:var(--brand-dark);font-size:16px;font-weight:600}
.scrim{
  position:fixed;inset:0;background:rgba(27,42,54,.45);
  opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease;z-index:55;
}
.scrim.is-on{opacity:1;visibility:visible}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 18px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--amber);color:#fff}
.btn-primary:hover{background:var(--amber-dark);color:#fff;box-shadow:0 6px 18px rgba(233,138,43,.28)}
.btn-secondary{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-secondary:hover{background:var(--brand-light);color:var(--brand-dark)}
.btn-lg{height:48px;padding:0 24px;font-size:16px}
.btn-sm{height:32px;padding:0 12px;font-size:13px}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-weight:600;font-size:15px;
  border-bottom:1px solid transparent;
}
.btn-link:hover{color:var(--brand-dark);border-bottom-color:var(--brand-dark)}
.btn-link svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2}

/* ---------- Badges / pills ---------- */
.pill{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:999px;
  background:var(--brand-light);color:var(--brand-dark);
  font-size:13px;line-height:1;font-weight:500;
}
.pill-amber{background:var(--amber-light);color:var(--amber-dark)}
.pill-plain{background:#fff;border:1px solid var(--line);color:var(--text-2)}

/* ---------- Breadcrumb ---------- */
.crumbs{padding:20px 0 0;font-size:13px;line-height:20px;color:var(--text-3)}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:#C3CFD9}
.crumbs a{color:var(--text-2)}
.crumbs a:hover{color:var(--brand)}
.crumbs .current{color:var(--text);font-weight:600}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  margin-top:16px;
  border-radius:18px;
  overflow:hidden;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  border:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:rgba(255,255,255,.93);
}
.page-hero-inner{position:relative;padding:56px 48px 52px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;line-height:20px;font-weight:600;letter-spacing:.06em;
  color:var(--brand);
}
.hero-eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand)}
.page-hero h1{margin-top:16px;max-width:760px}
.page-hero .lead{margin-top:16px;max-width:640px;font-size:17px;line-height:30px;color:var(--text-2)}
.hero-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.wave-divider{display:block;width:100%;height:38px;margin-top:8px}
.wave-divider path{fill:none;stroke:var(--brand);stroke-width:1.5;opacity:.35}

/* ---------- Sections ---------- */
section.block{padding:84px 0}
section.block.tight{padding:64px 0}
section.block.tinted{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{margin-top:12px}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16px;line-height:28px}
.eyebrow{font-size:13px;line-height:20px;font-weight:600;letter-spacing:.06em;color:var(--brand)}

/* ---------- Split 7/5 ---------- */
.split{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:start}
.figure{
  border-radius:var(--radius-img);overflow:hidden;
  border:1px solid var(--line);background:#fff;
  box-shadow:var(--shadow-1);
}
.figure img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
.figure figcaption{padding:12px 16px;font-size:13px;line-height:20px;color:var(--text-3);border-top:1px solid var(--line)}
.cap-list{display:flex;flex-direction:column;gap:0}
.cap-item{
  display:grid;grid-template-columns:46px 1fr;gap:14px;
  padding:18px 0;border-bottom:1px dashed var(--line);
}
.cap-item:last-child{border-bottom:0}
.cap-num{
  font-size:14px;font-weight:600;color:var(--brand);
  background:var(--brand-light);border-radius:8px;height:30px;
  display:inline-flex;align-items:center;justify-content:center;
  letter-spacing:.02em;
}
.cap-item h3{font-size:17px;line-height:26px}
.cap-item p{margin-top:6px;font-size:14px;line-height:24px;color:var(--text-2)}

/* ---------- Compare ---------- */
.compare{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);
}
.compare-head,
.compare-row{display:grid;grid-template-columns:1.1fr 1.3fr 1.3fr;gap:0}
.compare-head{background:var(--brand-light);color:var(--brand-dark);font-weight:600;font-size:14px}
.compare-head div{padding:14px 20px}
.compare-row{border-top:1px solid var(--line);min-height:52px;align-items:center}
.compare-row:nth-child(odd){background:#FBFCFD}
.compare-row div{padding:14px 20px;font-size:14px;line-height:24px;color:var(--text-2)}
.compare-row .k{color:var(--text);font-weight:600}
.compare-row .v-new{color:var(--brand-dark);font-weight:500}

/* ---------- Ability cards ---------- */
.ability-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px}
.ability{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-1);
  display:flex;flex-direction:column;
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.ability:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:#D5E2EC}
.ability .thumb{
  border-radius:var(--radius-img);overflow:hidden;margin:-8px -8px 18px;
}
.ability .thumb img{width:100%;aspect-ratio:16/10;object-fit:cover}
.ability h3{margin-bottom:8px}
.ability p{color:var(--text-2);font-size:14px;line-height:24px}
.ability .btn-link{margin-top:auto;padding-top:18px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}

/* ---------- Stats ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);
}
.stat{padding:28px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat .num{font-size:32px;line-height:40px;font-weight:600;color:var(--brand-dark);letter-spacing:.01em}
.stat .num span{font-size:15px;font-weight:500;color:var(--text-2);margin-left:4px}
.stat .label{margin-top:6px;font-size:14px;line-height:24px;color:var(--text-2)}

/* ---------- Voice / people ---------- */
.voice-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.voice{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;box-shadow:var(--shadow-1);position:relative;
}
.voice::before{
  content:"";position:absolute;left:0;top:24px;bottom:24px;width:3px;
  border-radius:3px;background:var(--brand-light);
}
.voice blockquote{margin:0;font-size:15px;line-height:27px;color:var(--text)}
.voice .who{display:flex;align-items:center;gap:12px;margin-top:18px}
.avatar{
  width:40px;height:40px;border-radius:50%;
  background:var(--brand-light);color:var(--brand-dark);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:600;
}
.who .name{font-size:14px;line-height:20px;font-weight:600;color:var(--text)}
.who .role{font-size:13px;line-height:20px;color:var(--text-3)}

/* ---------- FAQ ---------- */
.faq{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-1)}
.faq-item+.faq-item{border-top:1px solid var(--line)}
.faq-q{
  width:100%;min-height:52px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 22px;background:#fff;border:0;cursor:pointer;text-align:left;
  font-size:16px;line-height:26px;font-weight:600;color:var(--text);
  transition:background .18s ease,color .18s ease;
}
.faq-q:hover{background:#F8FAFC;color:var(--brand-dark)}
.faq-icon{
  position:relative;width:20px;height:20px;flex:0 0 20px;
  border-radius:50%;border:1px solid #C9D6E0;
}
.faq-icon::before,
.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:9px;height:1.6px}
.faq-icon::after{width:1.6px;height:9px;transition:transform .2s ease}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) scaleY(0)}
.faq-item.is-open .faq-q{color:var(--brand-dark)}
.faq-a{padding:0 22px 20px;color:var(--text-2);font-size:15px;line-height:28px;display:none;max-width:860px}
.faq-item.is-open .faq-a{display:block}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-light);
  border:1px solid #D3E3F0;
  border-radius:18px;
  padding:36px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-band h2{font-size:24px;line-height:34px;color:var(--brand-dark)}
.cta-band p{margin-top:10px;color:var(--text-2);font-size:15px;line-height:26px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-note{margin-top:14px;font-size:13px;line-height:20px;color:var(--text-3)}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:auto;
  background:#fff;
  border-top:1px solid var(--line);
  padding:56px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-desc{margin-top:16px;font-size:14px;line-height:24px;color:var(--text-2);max-width:320px}
.footer-col h4{font-size:14px;line-height:22px;margin-bottom:14px;color:var(--text)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;line-height:22px;color:var(--text-2)}
.footer-col a:hover{color:var(--brand)}
.footer-form label{display:block;font-size:13px;line-height:20px;color:var(--text-2);margin-bottom:10px}
.field{display:flex;gap:10px;flex-wrap:wrap}
.field input{
  flex:1 1 160px;min-width:0;height:44px;
  border:1px solid var(--line);border-radius:var(--radius-btn);
  padding:0 14px;font-size:14px;color:var(--text);background:#fff;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.field input::placeholder{color:var(--text-3)}
.field input:focus{outline:none;border-color:var(--brand);background:#FBFDFF;box-shadow:0 0 0 3px rgba(30,107,168,.12)}
.small{font-size:13px;line-height:20px;color:var(--text-3)}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;line-height:20px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-2)}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .container{padding:0 28px}
  .split{gap:36px}
  .page-hero-inner{padding:48px 36px 44px}
}
@media (max-width:1023px){
  .sidebar{width:280px;transform:translateX(-100%);box-shadow:0 0 0 1px var(--line)}
  .sidebar.is-open{transform:translateX(0)}
  .shell.is-collapsed .sidebar{width:280px}
  .shell.is-collapsed .brand-text,
  .shell.is-collapsed .brand-sub,
  .shell.is-collapsed .nav-label,
  .shell.is-collapsed .nav-title,
  .shell.is-collapsed .side-card,
  .shell.is-collapsed .side-copy{display:block}
  .shell.is-collapsed .nav-item{justify-content:flex-start;padding:8px 12px}
  .main{margin-left:0;padding-top:56px}
  .shell.is-collapsed .main{margin-left:0}
  .topbar{display:flex}
  .collapse-btn{display:none}
  .split{grid-template-columns:1fr;gap:28px}
  .ability-grid{grid-template-columns:1fr 1fr}
  .ability:first-child{grid-column:1 / -1}
  .stats{grid-template-columns:1fr 1fr}
  .stat{border-bottom:1px solid var(--line)}
  .stat:nth-child(2n){border-right:0}
  .stat:nth-child(3),
  .stat:nth-child(4){border-bottom:0}
  .voice-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  section.block{padding:72px 0}
  section.block.tight{padding:56px 0}
}
@media (max-width:767px){
  h1{font-size:30px;line-height:40px}
  h2{font-size:24px;line-height:34px}
  .page-hero-inner{padding:36px 22px 34px}
  .page-hero .lead{font-size:16px;line-height:28px}
  .hero-actions .btn{width:100%}
  .compare-head{display:none}
  .compare-row{grid-template-columns:1fr;padding:8px 0}
  .compare-row div{padding:6px 20px}
  .compare-row .k{padding-top:14px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .ability-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr}
  .stat{border-right:0}
  .stat:nth-child(3){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr}
  section.block{padding:56px 0}
  section.block.tight{padding:48px 0}
  .voice{padding:22px}
}

/* roulang page: category3 */
:root{
  --brand:#1E6BA8;
  --brand-deep:#14507F;
  --brand-soft:#E8F1F8;
  --accent:#E98A2B;
  --accent-deep:#CF7519;
  --accent-soft:#FDF3E6;
  --ok:#2E9E7E;
  --warn:#C4543F;
  --ink:#1B2A36;
  --ink-mid:#5A6C7A;
  --ink-soft:#8B9AA6;
  --line:#E3E9EF;
  --page:#F6F8FA;
  --card:#FFFFFF;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh:0 1px 2px rgba(27,42,54,.04), 0 8px 24px rgba(27,42,54,.06);
  --sh-hover:0 12px 32px rgba(27,42,54,.10);
  --t:180ms ease;
  --sidebar-w:240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;
  font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',Inter,system-ui,sans-serif;
  font-size:16px;
  line-height:28px;
  color:var(--ink);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea,select{font: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;border-radius:4px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;border-radius:8px;z-index:200}
.skip:focus{left:16px;top:12px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:64px 0}
.section--soft{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:720px;margin-bottom:40px}
.sec-head h2{font-size:28px;line-height:38px;font-weight:600;color:var(--brand-deep);letter-spacing:.2px}
.sec-head p{margin-top:12px;color:var(--ink-mid)}
.eyebrow{display:inline-block;font-size:13px;line-height:20px;letter-spacing:.6px;color:var(--brand);background:var(--brand-soft);border-radius:var(--r-pill);padding:4px 12px}

/* ---------- 顶栏（移动端） ---------- */
.topbar{
  position:fixed;top:0;left:0;right:0;height:56px;z-index:70;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:0 14px;background:#fff;border-bottom:1px solid var(--line);
}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;color:var(--ink-mid);transition:background var(--t),color var(--t);
}
.icon-btn:hover{background:#F1F5F9;color:var(--ink)}
.icon-btn svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7}
.icon-btn--accent{background:var(--accent);color:#fff;border-radius:10px}
.icon-btn--accent:hover{background:var(--accent-deep);color:#fff}

/* ---------- 品牌 ---------- */
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  width:36px;height:36px;flex:none;border-radius:10px;background:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:17px;font-weight:600;color:var(--brand-deep);letter-spacing:.4px}
.brand-sub{font-size:11px;color:var(--ink-soft);letter-spacing:.8px}

/* ---------- 侧栏 ---------- */
.sidebar{
  position:fixed;top:0;bottom:0;left:0;width:var(--sidebar-w);z-index:80;
  background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  transition:width var(--t),transform 220ms ease;
}
.sidebar-head{padding:22px 18px 14px}
.sidebar-body{flex:1;overflow-y:auto;padding:6px 12px 12px}
.nav-title{
  display:block;font-size:11px;letter-spacing:1.4px;color:var(--ink-soft);
  padding:8px 12px;text-transform:uppercase;
}
.nav-group{display:flex;flex-direction:column;gap:2px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;
  min-height:44px;padding:0 12px;border-radius:8px;
  font-size:14px;line-height:22px;color:var(--ink-mid);
  transition:background var(--t),color var(--t);
}
.nav-item svg{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.6}
.nav-item:hover{background:#F1F5F9;color:var(--ink)}
.nav-item.is-active{background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;background:var(--brand);
}
.sidebar-foot{padding:14px;border-top:1px solid var(--line)}
.dl-card{background:var(--brand-soft);border-radius:12px;padding:16px}
.dl-title{font-size:14px;font-weight:600;color:var(--brand-deep)}
.dl-desc{margin-top:6px;font-size:13px;line-height:20px;color:var(--ink-mid)}
.dl-card .btn{margin-top:12px;width:100%}
.sidebar-copy{margin-top:12px;font-size:12px;line-height:18px;color:var(--ink-soft)}
.collapse-btn{
  display:flex;align-items:center;gap:10px;height:44px;padding:0 18px;
  border-top:1px solid var(--line);font-size:13px;color:var(--ink-soft);
  transition:background var(--t),color var(--t);
}
.collapse-btn:hover{background:#F1F5F9;color:var(--ink)}
.collapse-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8}

body.is-collapsed{--sidebar-w:72px}
body.is-collapsed .brand-text,
body.is-collapsed .nav-label,
body.is-collapsed .nav-title,
body.is-collapsed .dl-title,
body.is-collapsed .dl-desc,
body.is-collapsed .sidebar-copy,
body.is-collapsed .collapse-label{display:none}
body.is-collapsed .nav-item{justify-content:center;padding:0}
body.is-collapsed .sidebar-head{padding:22px 0 14px;display:flex;justify-content:center}
body.is-collapsed .dl-card{padding:10px;display:flex;justify-content:center}
body.is-collapsed .dl-card .btn{margin-top:0;width:auto;padding:8px 10px;font-size:0}
body.is-collapsed .collapse-btn{justify-content:center;padding:0}

/* ---------- 抽屉遮罩 ---------- */
.scrim{position:fixed;inset:0;background:rgba(27,42,54,.45);z-index:75}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line)}

/* ---------- 主内容 ---------- */
.app-main{padding-top:56px;min-height:100vh}
@media (min-width:1024px){
  .app-main{margin-left:var(--sidebar-w);padding-top:0;transition:margin-left var(--t)}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 18px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.2px;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  border:1px solid transparent;white-space:nowrap;
}
.btn-sm{height:34px;padding:0 14px;font-size:14px}
.btn-lg{height:48px;padding:0 24px;font-size:16px}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(233,138,43,.22)}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:var(--brand-soft)}
.btn-plain{background:#fff;color:var(--brand);border-color:var(--line)}
.btn-plain:hover{background:var(--brand-soft);border-color:var(--brand-soft)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);
  border-bottom:1px solid rgba(30,107,168,.35);padding-bottom:2px;transition:color var(--t),border-color var(--t);
}
.btn-text:hover{color:var(--brand-deep);border-color:var(--brand-deep)}
.btn-text svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8}

/* ---------- 面包屑 ---------- */
.crumbs{font-size:13px;line-height:20px;color:var(--ink-soft);display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.crumbs a{color:var(--ink-soft)}
.crumbs a:hover{color:var(--brand)}
.crumbs span[aria-current]{color:var(--ink);font-weight:600}
.crumbs .sep{color:#C6D0D8}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background:#EFF5FA url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(94deg,rgba(255,255,255,.97) 0%,rgba(255,255,255,.9) 48%,rgba(255,255,255,.62) 100%);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center;padding:72px 0}
.hero h1{font-size:40px;line-height:48px;font-weight:600;color:var(--brand-deep);margin-top:18px;letter-spacing:.2px}
.hero-lead{margin-top:16px;font-size:17px;line-height:30px;color:var(--ink-mid);max-width:560px}
.hero-search{margin-top:24px;max-width:560px}
.search-box{
  display:flex;align-items:center;gap:10px;background:#fff;
  border:1px solid var(--line);border-radius:12px;padding:6px 6px 6px 16px;
  box-shadow:var(--sh);transition:border-color var(--t),box-shadow var(--t);
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(30,107,168,.12)}
.search-box svg{width:18px;height:18px;flex:none;fill:none;stroke:var(--ink-soft);stroke-width:1.8}
.search-box input{
  flex:1;min-width:0;height:40px;border:0;background:transparent;color:var(--ink);
  font-size:15px;
}
.search-box input::placeholder{color:var(--ink-soft)}
.hero-note{margin-top:10px;font-size:13px;line-height:20px;color:var(--ink-soft)}
.pill-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.pill{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:13px;line-height:20px;background:#fff;border:1px solid var(--line);color:var(--ink-mid);
}
.pill--brand{background:var(--brand-soft);border-color:transparent;color:var(--brand-deep)}
.pill--accent{background:var(--accent-soft);border-color:transparent;color:var(--accent-deep)}

.hero-visual{position:relative}
.hero-visual .frame{
  position:relative;border-radius:16px;overflow:hidden;background:#fff;
  border:1px solid var(--line);box-shadow:var(--sh);
}
.hero-visual .frame img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-visual .tag-card{
  position:absolute;left:-18px;bottom:-18px;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:14px 18px;box-shadow:var(--sh);
}
.hero-visual .tag-card b{display:block;font-size:20px;color:var(--brand-deep);font-weight:600}
.hero-visual .tag-card span{font-size:13px;color:var(--ink-soft)}

/* ---------- 卡片 ---------- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#D8E2EB}
.card h3{font-size:20px;line-height:30px;font-weight:600;color:var(--ink)}
.card p{margin-top:10px;color:var(--ink-mid);font-size:15px;line-height:26px}
.card .btn-text{margin-top:14px}

/* ---------- 快速自查 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;counter-reset:step}
.step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 24px 24px;box-shadow:var(--sh);transition:transform var(--t),box-shadow var(--t);
}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-hover)}
.step .num{
  font-family:Inter,system-ui,sans-serif;font-size:13px;font-weight:600;letter-spacing:1px;
  color:var(--brand);background:var(--brand-soft);border-radius:6px;padding:4px 8px;display:inline-block;
}
.step h3{margin-top:16px;font-size:18px;line-height:28px;font-weight:600}
.step p{margin-top:10px;font-size:15px;line-height:26px;color:var(--ink-mid)}
.step::after{
  content:"";position:absolute;left:24px;right:24px;bottom:0;height:3px;border-radius:3px 3px 0 0;
  background:var(--brand-soft);
}
.step:nth-child(2)::after{background:#D6E7F4}
.step:nth-child(3)::after{background:var(--accent-soft)}

/* ---------- 主题卡（两列） ---------- */
.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.topic{
  display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;box-shadow:var(--sh);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.topic:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#D8E2EB}
.topic .ic{
  width:42px;height:42px;flex:none;border-radius:11px;background:var(--brand-soft);
  display:flex;align-items:center;justify-content:center;
}
.topic .ic svg{width:22px;height:22px;fill:none;stroke:var(--brand);stroke-width:1.6}
.topic h3{font-size:17px;line-height:26px;font-weight:600}
.topic p{margin-top:8px;font-size:14px;line-height:24px;color:var(--ink-mid)}
.topic a{margin-top:10px;display:inline-flex;font-size:14px;font-weight:600;color:var(--brand)}
.topic a:hover{color:var(--brand-deep);text-decoration:underline}

/* ---------- FAQ 布局 ---------- */
.faq-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:48px;align-items:start}
.anchor-nav{position:sticky;top:96px}
.anchor-nav .anchor-title{font-size:12px;letter-spacing:1.2px;color:var(--ink-soft);margin-bottom:10px}
.anchor-nav ul{display:flex;flex-direction:column;gap:2px}
.anchor-nav a{
  display:block;padding:9px 12px;border-radius:8px;font-size:14px;color:var(--ink-mid);
  border-left:3px solid transparent;transition:background var(--t),color var(--t),border-color var(--t);
}
.anchor-nav a:hover{background:#fff;color:var(--brand-deep)}
.anchor-nav a.is-current{background:#fff;color:var(--brand-deep);font-weight:600;border-left-color:var(--brand)}
.anchor-tip{
  margin-top:20px;background:var(--brand-soft);border-radius:12px;padding:16px;
  font-size:13px;line-height:22px;color:var(--brand-deep);
}

.faq-group{margin-bottom:40px}
.faq-group h2{
  font-size:22px;line-height:32px;font-weight:600;color:var(--brand-deep);
  padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:16px;
  scroll-margin-top:96px;
}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;
  overflow:hidden;transition:border-color var(--t),box-shadow var(--t);
}
.faq-item:hover{border-color:#D8E2EB}
.faq-item.is-open{border-color:#CFE0EE;box-shadow:var(--sh)}
.faq-q{
  width:100%;min-height:52px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:12px 20px;text-align:left;font-size:16px;line-height:26px;font-weight:600;color:var(--ink);
}
.faq-sign{position:relative;width:22px;height:22px;flex:none}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform 200ms ease,opacity 200ms ease;
}
.faq-sign::before{width:14px;height:2px}
.faq-sign::after{width:2px;height:14px}
.faq-item.is-open .faq-sign::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{padding:0 20px 20px;font-size:15px;line-height:27px;color:var(--ink-mid);display:none}
.faq-item.is-open .faq-a{display:block}
.faq-a ol{margin-top:10px;counter-reset:faqstep}
.faq-a ol li{position:relative;padding-left:26px;margin-bottom:6px}
.faq-a ol li::before{
  counter-increment:faqstep;content:counter(faqstep);
  position:absolute;left:0;top:4px;width:18px;height:18px;border-radius:50%;
  background:var(--brand-soft);color:var(--brand-deep);font-size:11px;line-height:18px;text-align:center;font-weight:600;
}
.faq-a .meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.faq-empty{
  border:1px dashed #C6D6E2;border-radius:var(--r-card);background:#fff;
  padding:32px 24px;text-align:center;color:var(--ink-mid);font-size:15px;line-height:26px;
}
.faq-empty strong{display:block;color:var(--ink);font-size:17px;margin-bottom:6px}

/* ---------- 数据条 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:26px 24px;
  box-shadow:var(--sh);transition:transform var(--t),box-shadow var(--t);
}
.stat:hover{transform:translateY(-2px);box-shadow:var(--sh-hover)}
.stat b{
  font-family:Inter,system-ui,sans-serif;font-size:30px;line-height:38px;font-weight:600;color:var(--brand-deep);
  display:block;
}
.stat span{display:block;margin-top:6px;font-size:14px;line-height:22px;color:var(--ink-mid)}

/* ---------- 支持渠道 ---------- */
.channels{display:grid;grid-template-columns:420px minmax(0,1fr);gap:32px;align-items:start}
.channel-list{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:8px;box-shadow:var(--sh)}
.channel-list a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 16px;border-radius:10px;font-size:15px;color:var(--ink);transition:background var(--t);
}
.channel-list a:hover{background:var(--brand-soft)}
.channel-list a span{font-size:13px;color:var(--ink-soft)}
.channel-list svg{width:16px;height:16px;fill:none;stroke:var(--ink-soft);stroke-width:1.8}
.channel-body .card p + p{margin-top:8px}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-soft);border:1px solid #D5E6F2;border-radius:16px;
  padding:36px;display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-band h2{font-size:24px;line-height:34px;font-weight:600;color:var(--brand-deep)}
.cta-band p{margin-top:8px;color:var(--ink-mid);font-size:15px;line-height:26px}
.cta-actions{display:flex;gap:12px;flex:none}
.cta-meta{margin-top:14px;font-size:13px;color:var(--ink-soft)}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:40px;padding:64px 0 40px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-desc{margin-top:16px;font-size:14px;line-height:24px;color:var(--ink-mid);max-width:340px}
.footer-col h4{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--ink-mid);transition:color var(--t)}
.footer-col a:hover{color:var(--brand)}
.footer-form label{display:block;font-size:14px;line-height:22px;color:var(--ink-mid);margin-bottom:10px}
.footer-form .field{display:flex;gap:8px;flex-wrap:wrap}
.footer-form input{
  flex:1;min-width:180px;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:10px;
  background:#fff;color:var(--ink);transition:border-color var(--t),box-shadow var(--t),background var(--t);
}
.footer-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(30,107,168,.12);background:#FBFDFE}
.footer-form input.is-error{border-color:var(--warn);background:#FDF6F5}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 32px;display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-soft);
}
.footer-bottom a{color:var(--ink-soft)}
.footer-bottom a:hover{color:var(--brand)}
.small{font-size:13px;line-height:20px;color:var(--ink-soft)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero h1{font-size:34px;line-height:44px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
}
@media (max-width:1023px){
  .sidebar{transform:translateX(-100%);width:280px;box-shadow:0 0 40px rgba(27,42,54,.16)}
  .sidebar.is-open{transform:translateX(0)}
  body.is-collapsed{--sidebar-w:280px}
  body.is-collapsed .brand-text,
  body.is-collapsed .nav-label,
  body.is-collapsed .nav-title,
  body.is-collapsed .dl-title,
  body.is-collapsed .dl-desc,
  body.is-collapsed .sidebar-copy{display:block}
  body.is-collapsed .nav-item{justify-content:flex-start;padding:0 12px}
  body.is-collapsed .sidebar-head{padding:14px 16px;justify-content:flex-start}
  body.is-collapsed .dl-card{padding:16px;display:block}
  body.is-collapsed .dl-card .btn{margin-top:12px;width:100%;font-size:15px;padding:0 18px}
  .collapse-btn{display:none}
  .section{padding:72px 0}
  .hero-inner{grid-template-columns:1fr;gap:36px;padding:48px 0}
  .hero::after{background:linear-gradient(180deg,rgba(255,255,255,.97) 0%,rgba(255,255,255,.86) 100%)}
  .hero-lead{max-width:none}
  .hero-visual .tag-card{left:auto;right:12px;bottom:-14px}
  .steps{grid-template-columns:1fr;gap:16px}
  .topic-grid{grid-template-columns:1fr}
  .faq-layout{grid-template-columns:1fr;gap:24px}
  .anchor-nav{
    position:sticky;top:56px;z-index:30;background:var(--page);
    padding:10px 0 12px;margin:0 -24px;padding-left:24px;padding-right:24px;
    border-bottom:1px solid var(--line);overflow-x:auto;overflow-y:hidden;
  }
  .anchor-nav .anchor-title,.anchor-tip{display:none}
  .anchor-nav ul{flex-direction:row;gap:8px;white-space:nowrap}
  .anchor-nav a{border-left:0;border:1px solid var(--line);border-radius:var(--r-pill);padding:7px 14px;background:#fff}
  .anchor-nav a.is-current{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-deep)}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
  .channels{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start;gap:20px;padding:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px}
}
@media (max-width:639px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  .hero h1{font-size:28px;line-height:36px}
  .hero-lead{font-size:16px;line-height:28px}
  .sec-head h2{font-size:24px;line-height:34px}
  .card{padding:20px}
  .stats{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .faq-q{font-size:15px;padding:12px 16px}
  .faq-a{padding:0 16px 18px}
  .faq-empty{padding:24px 18px}
  .hero-visual .tag-card{position:static;margin-top:14px;display:inline-block}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category4 */
:root{
  --c-primary:#1E6BA8;
  --c-primary-dark:#14507F;
  --c-primary-soft:#E8F1F8;
  --c-accent:#E98A2B;
  --c-accent-dark:#CF7519;
  --c-accent-soft:#FDF3E6;
  --c-success:#2E9E7E;
  --c-warn:#C4543F;
  --c-text:#1B2A36;
  --c-text-2:#5A6C7A;
  --c-text-3:#8B9AA6;
  --c-line:#E3E9EF;
  --c-bg:#F6F8FA;
  --c-card:#FFFFFF;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(27,42,54,.04),0 8px 24px rgba(27,42,54,.06);
  --sh-hover:0 12px 32px rgba(27,42,54,.10);
  --sh-sm:0 1px 2px rgba(27,42,54,.05);
  --sidebar-w:240px;
  --sidebar-collapsed:72px;
  --t:180ms ease;
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:var(--c-primary);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--c-primary-dark)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
.num{font-family:var(--font-num);font-weight:600;letter-spacing:.01em}

.skip-link{
  position:absolute;left:-9999px;top:8px;z-index:200;
  background:var(--c-primary);color:#fff;padding:10px 16px;border-radius:var(--r-btn);
}
.skip-link:focus{left:16px;color:#fff}

/* ---------- 顶栏（移动端） ---------- */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:56px;z-index:80;
  background:#fff;border-bottom:1px solid var(--c-line);
  align-items:center;justify-content:space-between;padding:0 12px;
}
.topbar-btn{
  width:44px;height:44px;border-radius:var(--r-btn);display:grid;place-items:center;
  border:1px solid var(--c-line);background:#fff;transition:background var(--t),border-color var(--t);
}
.topbar-btn:hover{background:var(--c-primary-soft);border-color:#CFE0EC}
.topbar-btn svg{width:20px;height:20px;fill:none;stroke:var(--c-text);stroke-width:1.6;stroke-linecap:round}
.topbar-brand{display:flex;align-items:center;gap:8px;color:var(--c-text)}
.topbar-brand .brand-mark{width:32px;height:32px;border-radius:9px}

/* ---------- 左侧导航 ---------- */
.brand-mark{
  width:38px;height:38px;border-radius:11px;background:var(--c-primary);
  display:grid;place-items:center;flex:0 0 auto;
}
.brand-mark svg{width:22px;height:22px}

.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);z-index:90;
  background:#fff;border-right:1px solid var(--c-line);
  display:flex;flex-direction:column;padding:20px 16px;overflow-y:auto;
  transition:width var(--t),transform 260ms ease;
}
.brand{display:flex;align-items:center;gap:10px;padding:2px 8px 22px;color:var(--c-text)}
.brand-text{display:flex;flex-direction:column;line-height:1.25;white-space:nowrap}
.brand-name{font-size:17px;font-weight:600;letter-spacing:.04em}
.brand-sub{font-size:12px;color:var(--c-text-3)}

.nav-title{
  display:block;font-size:12px;letter-spacing:.14em;color:var(--c-text-3);
  padding:0 10px 8px;
}
.nav-group{display:flex;flex-direction:column;gap:4px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  height:40px;padding:0 10px;border-radius:8px;
  font-size:15px;color:var(--c-text-2);
  transition:background var(--t),color var(--t);
}
.nav-item svg{width:20px;height:20px;flex:0 0 auto;fill:none;stroke:currentColor;stroke-width:1.5}
.nav-item:hover{background:#F2F5F8;color:var(--c-text)}
.nav-item.is-active{background:var(--c-primary-soft);color:var(--c-primary-dark);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:-16px;top:8px;bottom:8px;width:3px;
  background:var(--c-primary);border-radius:0 3px 3px 0;
}
.nav-label{white-space:nowrap}

.side-cta{
  margin-top:auto;background:var(--c-primary-soft);border-radius:var(--r-card);
  padding:16px;display:flex;flex-direction:column;gap:10px;
}
.side-cta p{font-size:13px;line-height:1.6;color:var(--c-text-2)}
.side-cta .btn{width:100%;justify-content:center}
.side-foot{padding:14px 4px 0;border-top:1px solid var(--c-line);margin-top:16px}
.side-foot span{font-size:12px;color:var(--c-text-3);display:block;line-height:1.7}
.side-collapse{
  margin-top:12px;display:flex;align-items:center;gap:8px;height:40px;
  padding:0 10px;border-radius:8px;font-size:13px;color:var(--c-text-3);
  transition:background var(--t),color var(--t);
}
.side-collapse:hover{background:#F2F5F8;color:var(--c-text)}
.side-collapse svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round}

.sidebar.is-collapsed{width:var(--sidebar-collapsed);padding-left:13px;padding-right:13px}
.sidebar.is-collapsed .brand-text,
.sidebar.is-collapsed .nav-title,
.sidebar.is-collapsed .nav-label,
.sidebar.is-collapsed .side-cta,
.sidebar.is-collapsed .side-foot{display:none}
.sidebar.is-collapsed .brand{justify-content:center;padding-left:0;padding-right:0}
.sidebar.is-collapsed .nav-item{justify-content:center;padding:0}
.sidebar.is-collapsed .side-collapse{justify-content:center;padding:0}
.sidebar.is-collapsed .side-collapse span{display:none}

.drawer-mask{
  position:fixed;inset:0;background:rgba(27,42,54,.42);z-index:85;
  opacity:0;visibility:hidden;transition:opacity 220ms ease,visibility 220ms ease;
}

/* ---------- 主体布局 ---------- */
.main{margin-left:var(--sidebar-w);transition:margin-left var(--t)}
.sidebar.is-collapsed ~ .main{margin-left:var(--sidebar-collapsed)}
.site-footer{margin-left:var(--sidebar-w);transition:margin-left var(--t)}
.sidebar.is-collapsed ~ .site-footer{margin-left:var(--sidebar-collapsed)}

header .container,
main .container,
footer .container{
  width:100%;max-width:1200px;margin:0 auto;padding:0 32px;
}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--c-text-3);padding:28px 0 0;
}
.breadcrumb a{color:var(--c-text-2)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:var(--c-text-3)}
.breadcrumb .current{color:var(--c-text);font-weight:600}

/* ---------- Hero ---------- */
.hero{
  position:relative;margin-top:20px;
  background-image:linear-gradient(180deg,rgba(246,248,250,.93),rgba(232,241,248,.95)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border:1px solid var(--c-line);border-radius:20px;overflow:hidden;
}
.hero-inner{
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
  padding:56px 48px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--c-primary-dark);background:#fff;
  border:1px solid #D5E5F1;border-radius:var(--r-pill);padding:5px 14px;
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--c-accent);display:block}
.hero h1{
  font-size:40px;line-height:1.2;font-weight:600;letter-spacing:-.01em;
  margin:20px 0 16px;color:var(--c-text);
}
.hero h1 em{font-style:normal;color:var(--c-primary-dark)}
.hero .lead{font-size:17px;line-height:1.85;color:var(--c-text-2);max-width:52ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:#fff;border:1px solid #D5E5F1;color:var(--c-primary-dark);font-size:13px;
}
.hero-media{border-radius:var(--r-card);overflow:hidden;border:1px solid #fff;box-shadow:var(--sh-card);background:#fff}
.ratio-16-10{position:relative;aspect-ratio:16/10;overflow:hidden;border-radius:var(--r-img)}
.ratio-16-10 img{width:100%;height:100%;object-fit:cover}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background var(--t),color var(--t),border-color var(--t),box-shadow var(--t),transform var(--t);
  white-space:nowrap;
}
.btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.btn-primary{background:var(--c-accent);color:#fff;box-shadow:0 6px 16px rgba(233,138,43,.24)}
.btn-primary:hover{background:var(--c-accent-dark);color:#fff;transform:translateY(-1px)}
.btn-outline{background:#fff;color:var(--c-primary);border:1px solid var(--c-primary)}
.btn-outline:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);transform:translateY(-1px)}
.btn-lg{height:48px;padding:0 26px;font-size:16px}
.btn-sm{height:32px;padding:0 14px;font-size:13px}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--c-primary);font-size:15px;font-weight:600;
  border-bottom:1px solid transparent;transition:border-color var(--t),color var(--t),gap var(--t);
}
.btn-text:hover{color:var(--c-primary-dark);border-color:var(--c-primary-dark);gap:10px}
.btn-text svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---------- 板块 ---------- */
.section{padding:96px 0 0}
.section-head{max-width:720px;margin-bottom:36px}
.section-head h2{font-size:28px;line-height:1.35;font-weight:600;color:var(--c-text)}
.section-head p{margin-top:12px;color:var(--c-text-2);font-size:16px}
.tag-line{
  display:inline-block;font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--c-primary);margin-bottom:10px;font-family:var(--font-num);
}

/* ---------- 联系区 ---------- */
.contact-grid{display:grid;grid-template-columns:5fr 7fr;gap:32px;align-items:start}
.sticky-col{position:sticky;top:28px;display:flex;flex-direction:column;gap:20px}
.panel{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);
}
.panel h3{font-size:18px;font-weight:600;line-height:1.4;margin-bottom:16px}
.panel-sub{font-size:13px;color:var(--c-text-3);margin-bottom:14px}
.info-list{display:flex;flex-direction:column;gap:16px}
.info-item{display:flex;gap:12px;align-items:flex-start}
.info-icon{
  width:34px;height:34px;border-radius:10px;background:var(--c-primary-soft);
  display:grid;place-items:center;flex:0 0 auto;
}
.info-icon svg{width:17px;height:17px;fill:none;stroke:var(--c-primary-dark);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.info-item dt{font-size:13px;color:var(--c-text-3);margin-bottom:2px}
.info-item dd{font-size:15px;color:var(--c-text);line-height:1.6;word-break:break-all}
.credential{
  background:var(--c-primary-soft);border:1px solid #D5E5F1;border-radius:var(--r-card);padding:24px;
}
.credential h3{font-size:17px;font-weight:600;margin-bottom:14px;color:var(--c-primary-dark)}
.credential ul{display:flex;flex-direction:column;gap:10px}
.credential li{position:relative;padding-left:18px;font-size:14px;color:var(--c-text-2);line-height:1.7}
.credential li::before{
  content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;
  background:var(--c-primary);opacity:.7;
}

/* ---------- 表单 ---------- */
.form-card{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);padding:32px;box-shadow:var(--sh-card)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1 / -1}
.field label{font-size:14px;color:var(--c-text-2)}
.field label .req{color:var(--c-warn);margin-left:2px}
.field input,.field select,.field textarea{
  min-height:44px;padding:10px 14px;border:1px solid var(--c-line);border-radius:var(--r-btn);
  background:#fff;font-size:15px;color:var(--c-text);transition:border-color var(--t),background var(--t),box-shadow var(--t);
}
.field textarea{min-height:132px;resize:vertical;line-height:1.7}
.field input:hover,.field select:hover,.field textarea:hover{border-color:#CFE0EC}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);background:#FBFDFF;
  box-shadow:0 0 0 3px rgba(30,107,168,.12);
}
.field .hint{font-size:13px;color:var(--c-text-3)}
.check-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--c-text-2)}
.check-row input{width:18px;height:18px;margin-top:3px;accent-color:var(--c-primary)}
.form-foot{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:26px;padding-top:22px;border-top:1px solid var(--c-line)}
.form-note{font-size:13px;color:var(--c-text-3)}
.form-msg{
  margin-top:16px;padding:12px 16px;border-radius:var(--r-btn);font-size:14px;display:none;
  background:rgba(46,158,126,.08);border:1px solid rgba(46,158,126,.32);color:#22705A;
}
.form-msg.is-visible{display:block}

/* ---------- 服务范围 ---------- */
.split{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center}
.cover-frame{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--sh-card);background:#fff}
.cover-frame .ratio-16-10{border-radius:0}
.check-list{display:flex;flex-direction:column;gap:22px}
.check-list li{display:flex;gap:14px}
.check-mark{
  width:26px;height:26px;border-radius:8px;flex:0 0 auto;margin-top:2px;
  background:var(--c-primary-soft);display:grid;place-items:center;
}
.check-mark svg{width:14px;height:14px;fill:none;stroke:var(--c-primary-dark);stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.check-list h3{font-size:17px;font-weight:600;line-height:1.5}
.check-list p{margin-top:6px;font-size:15px;color:var(--c-text-2);line-height:1.75}

/* ---------- 流程 ---------- */
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-sm);
}
.step{padding:28px 24px;border-right:1px solid var(--c-line);position:relative}
.step:last-child{border-right:0}
.step-num{
  font-family:var(--font-num);font-size:13px;font-weight:600;color:var(--c-primary);
  background:var(--c-primary-soft);border-radius:var(--r-pill);padding:3px 12px;display:inline-block;
}
.step h3{font-size:16px;font-weight:600;margin:14px 0 8px;line-height:1.5}
.step p{font-size:14px;color:var(--c-text-2);line-height:1.75}

/* ---------- 数据与资质 ---------- */
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:32px}
.stat{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);transition:box-shadow var(--t),transform var(--t);
}
.stat:hover{box-shadow:var(--sh-hover);transform:translateY(-2px)}
.stat strong{display:block;font-family:var(--font-num);font-size:32px;line-height:1.1;color:var(--c-primary-dark);font-weight:600}
.stat span{display:block;margin-top:8px;font-size:14px;color:var(--c-text-2)}

.qual-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px}
.qual-card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-sm);transition:box-shadow var(--t),transform var(--t);
}
.qual-card:hover{box-shadow:var(--sh-hover);transform:translateY(-2px)}
.qual-card h3{font-size:17px;font-weight:600;margin-bottom:12px}
.qual-card p{font-size:15px;color:var(--c-text-2);line-height:1.8}
.qual-card ul{display:flex;flex-direction:column;gap:12px;margin-top:6px}
.qual-card li{display:flex;justify-content:space-between;gap:16px;font-size:14px;color:var(--c-text-2);padding-bottom:12px;border-bottom:1px dashed var(--c-line)}
.qual-card li:last-child{border-bottom:0;padding-bottom:0}
.qual-card li b{color:var(--c-text);font-weight:600}

/* ---------- FAQ ---------- */
.faq{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-sm)}
.faq-item + .faq-item{border-top:1px solid var(--c-line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:52px;padding:16px 24px;text-align:left;font-size:16px;font-weight:600;color:var(--c-text);
  transition:background var(--t);
}
.faq-q:hover{background:#F8FAFC}
.faq-sign{
  position:relative;width:20px;height:20px;flex:0 0 auto;border-radius:50%;
  background:var(--c-primary-soft);
}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-primary-dark);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform 200ms ease,opacity 200ms ease;
}
.faq-sign::before{width:10px;height:1.6px}
.faq-sign::after{width:1.6px;height:10px}
.faq-item.is-open .faq-sign::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height 240ms ease}
.faq-a-inner{padding:0 24px 22px;font-size:15px;color:var(--c-text-2);line-height:1.85}
.faq-a-inner p + p{margin-top:10px}

/* ---------- CTA 条 ---------- */
.cta-band{
  margin-top:96px;background:var(--c-primary-soft);border:1px solid #D5E5F1;border-radius:20px;
  padding:40px 48px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:24px;font-weight:600;line-height:1.4}
.cta-band p{margin-top:8px;font-size:15px;color:var(--c-text-2)}
.cta-band .btn-group{display:flex;gap:12px;flex-wrap:wrap}
.cta-meta{margin-top:14px;font-size:13px;color:var(--c-text-3)}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:0;background:#F1F4F7;border-top:1px solid var(--c-line);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{width:36px;height:36px;border-radius:10px}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.footer-desc{font-size:14px;color:var(--c-text-2);line-height:1.8;max-width:34ch}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--c-text-2)}
.footer-col a:hover{color:var(--c-primary-dark)}
.footer-form label{display:block;font-size:14px;color:var(--c-text-2);margin-bottom:12px;line-height:1.7}
.footer-form .field{flex-direction:row;gap:10px;align-items:center;flex-wrap:wrap}
.footer-form input{flex:1 1 180px;min-height:44px;padding:10px 14px;border:1px solid var(--c-line);border-radius:var(--r-btn);background:#fff;font-size:14px}
.footer-form input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(30,107,168,.12)}
.small{font-size:13px;color:var(--c-text-3);line-height:1.7}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--c-text-3);
}
.footer-bottom a{color:var(--c-text-2)}
.footer-bottom a:hover{color:var(--c-primary-dark)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  header .container,main .container,footer .container{padding:0 28px}
  .hero-inner{padding:48px 36px;gap:36px}
}
@media (max-width:1023px){
  .topbar{display:flex}
  .sidebar{transform:translateX(-100%);width:280px;box-shadow:0 0 40px rgba(27,42,54,.16);padding-top:20px}
  body.drawer-open .sidebar{transform:translateX(0)}
  body.drawer-open .drawer-mask{opacity:1;visibility:visible}
  body.drawer-open{overflow:hidden}
  .main,.site-footer{margin-left:0}
  .sidebar.is-collapsed{width:280px;padding-left:16px;padding-right:16px}
  .sidebar.is-collapsed .brand-text,
  .sidebar.is-collapsed .nav-title,
  .sidebar.is-collapsed .nav-label,
  .sidebar.is-collapsed .side-cta,
  .sidebar.is-collapsed .side-foot{display:block}
  .sidebar.is-collapsed .side-cta{display:flex}
  .sidebar.is-collapsed .nav-item{justify-content:flex-start;padding:0 10px}
  .sidebar.is-collapsed .brand{justify-content:flex-start;padding-left:8px}
  .side-collapse{display:none}
  .main{padding-top:56px}
  .breadcrumb{padding-top:24px}
  .hero-inner{grid-template-columns:1fr;padding:40px 28px}
  .hero h1{font-size:32px}
  .contact-grid{grid-template-columns:1fr}
  .sticky-col{position:static}
  .split{grid-template-columns:1fr;gap:32px}
  .steps{grid-template-columns:1fr 1fr}
  .step:nth-child(2n){border-right:0}
  .step:nth-child(n+3){border-top:1px solid var(--c-line)}
  .stat-row{grid-template-columns:1fr 1fr}
  .qual-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding-top:72px}
  .cta-band{margin-top:72px;padding:32px 28px}
}
@media (max-width:767px){
  .hero h1{font-size:28px;line-height:1.3}
  .hero .lead{font-size:16px}
  .section-head h2{font-size:24px}
  .stat-row{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .step{border-right:0;border-bottom:1px solid var(--c-line)}
  .step:last-child{border-bottom:0}
  .form-grid{grid-template-columns:1fr}
  .form-card{padding:24px 20px}
  .cta-band h2{font-size:21px}
  .panel{padding:20px}
}
@media (max-width:520px){
  header .container,main .container,footer .container{padding:0 18px}
  .hero{border-radius:16px}
  .hero-inner{padding:30px 20px}
  .hero-actions .btn{width:100%}
  .pill-row{gap:8px}
  .breadcrumb{font-size:12px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq-q{padding:14px 18px;font-size:15px}
  .faq-a-inner{padding:0 18px 20px}
}