/* roulang page: index */
:root{
  --primary:#1C6FE0;
  --primary-dark:#1355B5;
  --primary-soft:#E8F1FE;
  --primary-ring:rgba(28,111,224,.28);
  --accent:#FF6A2B;
  --accent-soft:#FFF1E9;
  --accent-dark:#E0561C;
  --ok:#14B87A;
  --ok-soft:#E6F8F1;
  --warn:#F2A93B;
  --warn-soft:#FDF4E3;
  --title:#101F33;
  --text:#43536A;
  --muted:#8494A8;
  --line:#E6ECF3;
  --bg:#F4F7FB;
  --surface:#FFFFFF;
  --radius-card:16px;
  --radius-sub:12px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(16,32,64,.05),0 8px 24px rgba(16,32,64,.06);
  --shadow-2:0 2px 6px rgba(16,32,64,.07),0 14px 34px rgba(16,32,64,.10);
  --section:clamp(72px,8vw,96px);
  --ease:cubic-bezier(.4,0,.2,1);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--primary-dark)}
button{font-family:inherit}
h1,h2,h3,h4{color:var(--title);margin:0;font-weight:700;line-height:1.35}
h1{font-size:40px;line-height:1.25}
h2{font-size:28px}
h3{font-size:20px;font-weight:600}
p{margin:0 0 16px}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary-ring);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.section{padding:var(--section) 0}
.section--tight{padding:clamp(56px,6vw,72px) 0}
.section-head{margin-bottom:36px;max-width:760px}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.06em;color:var(--primary);
  background:var(--primary-soft);border-radius:var(--radius-pill);
  padding:4px 14px;margin-bottom:14px;font-weight:600;
}
.section-head p{font-size:15px;color:var(--text);margin:12px 0 0}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 4px 18px rgba(16,32,64,.06)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--title);white-space:nowrap}
.brand-mark{
  width:32px;height:32px;border-radius:10px;flex:0 0 32px;
  background:linear-gradient(135deg,var(--primary) 0%,#4E96F0 100%);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:700;
}
.brand-en{color:var(--primary)}
.brand-cn{font-size:15px;font-weight:600;color:var(--title)}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-link-c{
  position:relative;display:inline-block;padding:8px 14px;
  font-size:15px;color:var(--text);border-radius:8px;transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link-c:hover{color:var(--primary);background:var(--primary-soft)}
.nav-link-c.is-active{color:var(--primary);font-weight:600}
.nav-link-c.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--primary);
}
.nav-side{display:flex;align-items:center;gap:12px}
.badge-status{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--radius-pill);background:var(--ok-soft);color:#0E8C5C;
  font-size:13px;font-weight:600;white-space:nowrap;
}
.badge-status .dot{width:7px;height:7px;border-radius:50%;background:var(--ok)}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;
  border-radius:12px;align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--title);transition:.2s var(--ease)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ 按钮 ============ */
.btn-c{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.btn-c:hover{transform:translateY(-2px)}
.btn-c:active{transform:translateY(1px)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(255,106,43,.22)}
.btn-accent:hover{background:var(--accent-dark);color:#fff}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(28,111,224,.20)}
.btn-primary:hover{background:var(--primary-dark);color:#fff}
.btn-ghost{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-ghost:hover{background:var(--primary-soft);color:var(--primary-dark)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:52px;padding:0 28px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600}
.link-more .arrow{transition:transform .2s var(--ease)}
.link-more:hover .arrow{transform:translateX(4px)}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#F4F7FB 0%,#FFFFFF 100%);padding:64px 0 76px}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;opacity:.10;pointer-events:none;
}
.hero-inner{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}
.pill{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--radius-pill);
  font-size:13px;font-weight:600;
}
.pill-ok{background:var(--ok-soft);color:#0E8C5C}
.pill-primary{background:var(--primary-soft);color:var(--primary-dark)}
.pill-warn{background:var(--warn-soft);color:#B67A1D}
.hero h1{margin-bottom:18px}
.hero-sub{font-size:17px;line-height:1.8;color:var(--text);max-width:520px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:16px}
.hero-meta{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px 18px}
.hero-meta b{color:var(--title);font-weight:600;font-variant-numeric:tabular-nums}
.hero-visual{position:relative;padding:12px 12px 40px}
.hero-shot-main{
  border-radius:var(--radius-card);box-shadow:var(--shadow-2);width:100%;
  aspect-ratio:16/10;object-fit:cover;background:#fff;
}
.hero-shot-sub{
  position:absolute;right:0;bottom:0;width:52%;border-radius:var(--radius-sub);
  border:4px solid #fff;box-shadow:var(--shadow-2);transform:rotate(-2deg);
  aspect-ratio:16/10;object-fit:cover;background:#fff;
}

/* ============ 轮播 ============ */
.shots{background:#fff;border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:28px;position:relative}
.shot-item{display:grid;grid-template-columns:1.15fr 1fr;gap:32px;align-items:center}
.shot-figure{border-radius:var(--radius-sub);overflow:hidden;border:1px solid var(--line);background:#F7FAFF}
.shot-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
.shot-copy h3{margin-bottom:12px}
.shot-copy p{font-size:15px;margin-bottom:14px}
.shot-params{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:12px;display:flex;gap:16px;flex-wrap:wrap}
.carousel-indicators{position:static;margin:24px 0 0;justify-content:flex-start;gap:8px}
.carousel-indicators [data-bs-target]{width:36px;height:4px;border-radius:999px;background:var(--line);border:0;opacity:1;margin:0;transition:.2s var(--ease)}
.carousel-indicators .active{background:var(--primary)}
.carousel-control-prev,.carousel-control-next{
  width:44px;height:44px;border-radius:50%;background:#fff;box-shadow:var(--shadow-1);
  opacity:1;top:38%;border:1px solid var(--line);color:var(--primary);
}
.carousel-control-prev{left:6px}
.carousel-control-next{right:6px}
.carousel-control-prev:hover,.carousel-control-next:hover{background:#fff;box-shadow:var(--shadow-2)}
.carousel-control-prev-icon,.carousel-control-next-icon{background-image:none!important;width:auto;height:auto;font-size:22px;line-height:1;color:var(--primary)}
.carousel-control-prev-icon::before{content:"‹"}
.carousel-control-next-icon::before{content:"›"}

/* ============ 能力亮点 ============ */
.highlight-row{display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:center;padding:32px 0}
.highlight-row+.highlight-row{border-top:1px solid var(--line)}
.highlight-row.is-reverse .highlight-media{order:2}
.highlight-row.is-reverse .highlight-body{order:1}
.highlight-media img{border-radius:var(--radius-card);box-shadow:var(--shadow-1);aspect-ratio:16/10;object-fit:cover;width:100%}
.highlight-num{
  font-size:14px;font-weight:700;color:var(--primary);letter-spacing:.12em;
  font-variant-numeric:tabular-nums;display:inline-block;margin-bottom:10px;
  background:var(--primary-soft);border-radius:var(--radius-pill);padding:2px 14px;
}
.highlight-body h3{margin-bottom:12px}
.highlight-body p{margin:0;font-size:15.5px}

/* ============ 系统要求 ============ */
.req-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.req-card{background:#fff;border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:8px 24px;transition:.2s var(--ease)}
.req-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.req-item{display:flex;align-items:center;gap:12px;min-height:44px;padding:12px 0}
.req-item+.req-item{border-top:1px solid var(--line)}
.req-icon{width:28px;height:28px;flex:0 0 28px;border-radius:9px;background:var(--primary-soft);display:flex;align-items:center;justify-content:center}
.req-icon svg{width:15px;height:15px;stroke:var(--primary);fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.req-label{font-size:14px;color:var(--muted);flex:0 0 104px}
.req-value{font-size:15px;color:var(--title);font-weight:500}
.req-note{font-size:13px;color:var(--muted);margin-bottom:22px}

/* ============ 评价墙 ============ */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quote-card{background:#fff;border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:24px;transition:.2s var(--ease);display:flex;flex-direction:column}
.quote-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.quote-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--primary-soft);color:var(--primary-dark);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex:0 0 40px}
.quote-name{font-size:15px;color:var(--title);font-weight:600}
.quote-tag{display:inline-block;font-size:12px;color:var(--primary-dark);background:var(--primary-soft);border-radius:var(--radius-pill);padding:1px 10px;margin-top:2px}
.quote-text{font-size:15px;line-height:1.85;margin:0 0 14px}
.quote-time{font-size:12px;color:var(--muted);margin-top:auto}

/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden;transition:.2s var(--ease);display:flex;flex-direction:column}
.news-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.news-card__link{display:flex;flex-direction:column;height:100%;color:inherit}
.news-card__link:hover{color:inherit}
.news-card__thumb{margin:0}
.news-card__thumb img{width:100%;aspect-ratio:16/10;object-fit:cover}
.news-card__body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.news-card__title{
  font-size:18px;font-weight:600;color:var(--title);margin-bottom:10px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s var(--ease);
}
.news-card:hover .news-card__title{color:var(--primary)}
.news-card__desc{
  font-size:14px;line-height:1.8;color:var(--text);margin:0 0 16px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted);margin-top:auto}
.tag-chip{display:inline-block;font-size:12px;color:var(--primary-dark);background:var(--primary-soft);border-radius:var(--radius-pill);padding:2px 10px}
.empty-state{
  min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:#fff;border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:32px;text-align:center;
}
.empty-state svg{width:48px;height:48px;stroke:var(--primary-ring);fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.empty-state p{margin:0;font-size:15px;color:var(--muted)}

/* ============ CTA ============ */
.cta-band{
  background:var(--primary-soft);border-radius:var(--radius-card);padding:40px 44px;
  display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center;
  background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;
}
.cta-band h2{font-size:26px;margin-bottom:10px}
.cta-band p{margin:0;font-size:15px;max-width:520px}
.cta-side{display:flex;align-items:center;gap:24px;justify-content:flex-end}
.cta-actions{display:flex;flex-direction:column;gap:12px}
.qr-box{width:120px;height:120px;border-radius:var(--radius-sub);background:#fff;box-shadow:var(--shadow-1);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;flex:0 0 120px}
.qr-box svg{width:56px;height:56px;stroke:var(--primary);fill:none;stroke-width:1.5}
.qr-box span{font-size:12px;color:var(--muted)}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px}
.accordion-item{border:0;border-radius:var(--radius-card)!important;background:#fff;box-shadow:var(--shadow-1);margin-bottom:12px;overflow:hidden}
.accordion-button{
  font-size:15px;font-weight:600;color:var(--title);background:#fff;padding:20px 60px 20px 24px;
  border-radius:var(--radius-card)!important;box-shadow:none!important;position:relative;
}
.accordion-button::after{display:none}
.accordion-button::before{
  content:"＋";position:absolute;right:24px;top:50%;transform:translateY(-50%);
  color:var(--muted);font-size:17px;line-height:1;transition:.2s var(--ease);
}
.accordion-button:not(.collapsed){color:var(--primary);box-shadow:inset 3px 0 0 var(--primary)!important}
.accordion-button:not(.collapsed)::before{content:"－";color:var(--primary)}
.accordion-button:focus{box-shadow:none!important;outline:2px solid var(--primary-ring);outline-offset:-2px}
.accordion-body{padding:0 24px 22px;font-size:15px;line-height:1.85;color:var(--text)}

/* ============ 页脚 ============ */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:56px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:32px;padding-bottom:32px}
.footer-brand p{font-size:14px;color:var(--text);margin:14px 0 0;max-width:300px}
.footer-title{font-size:15px;font-weight:600;color:var(--title);margin-bottom:14px}
.footer-list li{margin-bottom:10px}
.footer-list a{font-size:14px;color:var(--text)}
.footer-list a:hover{color:var(--primary)}
.footer-contact{font-size:14px;color:var(--text)}
.footer-contact .row{display:flex;gap:8px;margin-bottom:8px}
.footer-contact b{color:var(--title);font-weight:600}
.footer-bottom{border-top:1px solid var(--line);padding-top:20px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--muted)}

/* ============ 移动下载条 ============ */
.mobile-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:1040;
  height:60px;background:rgba(255,255,255,.96);border-top:1px solid var(--line);
  align-items:center;gap:12px;padding:0 16px;backdrop-filter:blur(10px);
}
.mobile-bar .btn-c{flex:1}
.mobile-bar .bar-link{font-size:14px;font-weight:600;white-space:nowrap}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .hero-inner{gap:40px}
}
@media (max-width:991.98px){
  h1{font-size:32px}
  h2{font-size:24px}
  .nav-menu,.nav-side{display:none}
  .nav-toggle{display:flex}
  .site-header.is-open .nav-menu,
  .site-header.is-open .nav-side{
    display:flex;position:absolute;left:0;right:0;top:72px;background:#fff;
    flex-direction:column;align-items:stretch;gap:0;padding:8px 16px 16px;
    border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(16,32,64,.08);
  }
  .site-header.is-open .nav-menu .nav-link-c{padding:14px 12px;font-size:16px;border-radius:10px}
  .site-header.is-open .nav-link-c.is-active::after{display:none}
  .site-header.is-open .nav-side{padding-top:0;gap:12px}
  .site-header.is-open .nav-side .btn-c{width:100%}
  .hero-inner{grid-template-columns:1fr}
  .hero-visual{order:-1;padding:0 0 32px}
  .hero-sub{max-width:none;font-size:16px}
  .shot-item{grid-template-columns:1fr;gap:20px}
  .highlight-row{grid-template-columns:1fr;gap:20px;padding:28px 0}
  .highlight-row.is-reverse .highlight-media{order:0}
  .highlight-row.is-reverse .highlight-body{order:0}
  .req-grid{grid-template-columns:1fr}
  .quote-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;padding:32px 28px}
  .cta-side{justify-content:flex-start;flex-wrap:wrap}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767.98px){
  body{font-size:15px;padding-bottom:60px}
  h1{font-size:28px}
  h2{font-size:22px}
  h3{font-size:18px}
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section-head--row{flex-direction:column;align-items:flex-start;gap:12px}
  .hero{padding:40px 0 52px}
  .hero-actions{flex-direction:column}
  .hero-actions .btn-c{width:100%}
  .quote-grid,.news-grid{grid-template-columns:1fr}
  .cta-side{flex-direction:column;align-items:stretch}
  .cta-actions .btn-c{width:100%}
  .qr-box{width:120px;flex:0 0 120px;margin:0 auto}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;gap:6px}
  .mobile-bar{display:flex}
  .shots{padding:20px 16px}
  .req-card{padding:6px 18px}
  .req-item{flex-wrap:wrap;gap:6px}
  .req-label{flex:0 0 auto}
  .carousel-control-prev,.carousel-control-next{display:none}
}
@media (max-width:519.98px){
  .hero-shot-sub{position:static;width:100%;transform:none;margin-top:14px}
  .hero-visual{padding-bottom:0}
  .cta-band{padding:26px 20px}
}

/* roulang page: article */
:root{
  --primary:#1C6FE0;
  --primary-dark:#1355B5;
  --primary-soft:#E8F1FE;
  --accent:#FF6A2B;
  --accent-dark:#E0561C;
  --accent-soft:#FFF1E9;
  --success:#14B87A;
  --success-soft:#E6F8F1;
  --warn:#F2A93B;
  --warn-soft:#FDF4E3;
  --ink:#101F33;
  --text:#43536A;
  --muted:#8494A8;
  --line:#E6ECF3;
  --bg:#F4F7FB;
  --surface:#FFFFFF;
  --r-card:16px;
  --r-sub:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,32,64,.05), 0 8px 24px rgba(16,32,64,.06);
  --sh-2:0 2px 6px rgba(16,32,64,.07), 0 14px 34px rgba(16,32,64,.10);
  --focus:rgba(28,111,224,.28);
  --ease:cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button{font-family:inherit}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:6px}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 18px rgba(16,32,64,.07);background:#fff}
.nav-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:38px;height:38px;border-radius:var(--r-btn);
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:700;line-height:1;letter-spacing:.5px;
}
.brand-en{display:block;font-size:17px;font-weight:700;color:var(--primary);line-height:1.15;letter-spacing:.6px}
.brand-cn{display:block;font-size:12px;font-weight:600;color:var(--ink);line-height:1.3;letter-spacing:1px}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link-c{
  position:relative;padding:10px 14px;border-radius:var(--r-btn);
  font-size:15px;color:var(--text);white-space:nowrap;
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.nav-link-c:hover{color:var(--primary);background:var(--primary-soft)}
.nav-link-c.is-active{color:var(--primary);font-weight:600}
.nav-link-c.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  border-radius:2px;background:var(--primary);
}
.nav-side{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.badge-status{
  display:inline-flex;align-items:center;gap:7px;height:28px;padding:0 12px;
  border-radius:var(--r-pill);background:var(--success-soft);color:#0E8F5E;
  font-size:13px;font-weight:600;white-space:nowrap;
}
.badge-status .dot{width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 0 3px rgba(20,184,122,.18)}
.nav-cta-mobile{display:none}
.nav-toggle{
  display:none;width:44px;height:44px;padding:0;border:1px solid var(--line);
  border-radius:var(--r-sub);background:#fff;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--primary);box-shadow:0 4px 12px rgba(16,32,64,.08)}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn-c{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-c:hover{transform:translateY(-2px)}
.btn-c:active{transform:translateY(1px)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 22px rgba(255,106,43,.22)}
.btn-accent:hover{background:var(--accent-dark);color:#fff}
.btn-primary-o{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-primary-o:hover{background:var(--primary-soft);color:var(--primary-dark);border-color:var(--primary-dark)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-link-c{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:15px}
.btn-link-c .arrow{transition:transform .2s var(--ease)}
.btn-link-c:hover{color:var(--primary-dark)}
.btn-link-c:hover .arrow{transform:translateX(4px)}

/* ---------- breadcrumb & article head ---------- */
.page-top{background:linear-gradient(180deg,#F4F7FB 0%,#FFFFFF 100%);border-bottom:1px solid var(--line)}
.breadcrumb-c{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:20px 0 0;font-size:14px;color:var(--muted)}
.breadcrumb-c a{color:var(--muted)}
.breadcrumb-c a:hover{color:var(--primary)}
.breadcrumb-c .sep{color:#C6D3E2}
.breadcrumb-c .current{color:var(--ink);font-weight:600}
.article-head{max-width:820px;margin:0 auto;padding:16px 0 40px}
.article-head h1{
  font-size:40px;line-height:1.28;font-weight:700;color:var(--ink);
  letter-spacing:-.3px;margin:14px 0 18px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13px;color:var(--muted)}
.tag-pill{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);background:var(--primary-soft);color:var(--primary-dark);
  font-size:13px;font-weight:600;
}
.meta-item{display:inline-flex;align-items:center;gap:6px}

/* ---------- article body ---------- */
.article-section{padding:clamp(28px,4vw,48px) 0 clamp(48px,6vw,72px)}
.article-wrap{max-width:820px;margin:0 auto}
.article-body{
  background:var(--surface);border-radius:var(--r-card);box-shadow:var(--sh-1);
  padding:clamp(24px,3.6vw,44px);
  font-size:16px;line-height:1.9;color:var(--text);
  overflow-wrap:break-word;
}
.article-body > *:first-child{margin-top:0}
.article-body > * + *{margin-top:1.2em}
.article-body p{margin:0}
.article-body h2{font-size:24px;line-height:1.45;font-weight:700;color:var(--ink);margin:1.8em 0 0}
.article-body h3{font-size:19px;line-height:1.5;font-weight:600;color:var(--ink);margin:1.6em 0 0}
.article-body h4{font-size:17px;color:var(--ink);margin:1.4em 0 0}
.article-body ul,.article-body ol{padding-left:1.35em;margin:0}
.article-body li+li{margin-top:.4em}
.article-body ul li::marker{color:var(--primary)}
.article-body ol li::marker{color:var(--primary);font-weight:600}
.article-body strong{color:var(--ink)}
.article-body a{color:var(--primary);border-bottom:1px solid rgba(28,111,224,.35)}
.article-body a:hover{color:var(--primary-dark);border-bottom-color:var(--primary-dark)}
.article-body blockquote{
  margin:1.5em 0;padding:14px 20px;border-left:3px solid var(--primary);
  background:var(--primary-soft);border-radius:0 var(--r-sub) var(--r-sub) 0;color:var(--text);
}
.article-body img{border-radius:var(--r-sub);margin:1.5em auto}
.article-body figure{margin:1.5em 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px;line-height:1.7}
.article-body code{
  background:#F1F5FA;color:var(--ink);padding:2px 6px;border-radius:6px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em;
}
.article-body pre{
  background:#F5F8FC;border:1px solid var(--line);border-radius:var(--r-sub);
  padding:16px 18px;overflow-x:auto;line-height:1.7;
}
.article-body pre code{background:transparent;padding:0}
.article-body table{
  display:block;width:100%;overflow-x:auto;border-collapse:collapse;font-size:15px;
}
.article-body th{
  background:#F4F7FB;color:var(--ink);font-weight:600;text-align:left;
  padding:10px 14px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.article-body td{padding:10px 14px;border-bottom:1px solid var(--line)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}

.empty-state{
  background:var(--surface);border-radius:var(--r-card);box-shadow:var(--sh-1);
  min-height:260px;padding:48px 24px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;text-align:center;
}
.empty-state svg{color:rgba(28,111,224,.35)}
.empty-state h2{font-size:22px;color:var(--ink)}
.empty-state p{margin:0;font-size:15px;color:var(--muted)}

.article-foot{
  max-width:820px;margin:28px auto 0;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
}

/* ---------- sections & cards ---------- */
.section{padding:clamp(48px,6vw,80px) 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;flex-wrap:wrap}
.section-head h2{font-size:28px;line-height:1.35;letter-spacing:-.2px}
.section-head p{margin:8px 0 0;font-size:15px;color:var(--muted)}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card-c{
  display:flex;flex-direction:column;background:var(--surface);
  border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.card-c:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.card-thumb{aspect-ratio:16/10;background:var(--primary-soft);overflow:hidden}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.card-c:hover .card-thumb img{transform:scale(1.03)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1 1 auto}
.card-body h3{font-size:19px;line-height:1.5;color:var(--ink);transition:color .2s var(--ease)}
.card-c:hover .card-body h3{color:var(--primary)}
.card-body p{margin:10px 0 0;font-size:14px;line-height:1.8;color:var(--text)}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.chip{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);background:#F1F5FA;color:var(--muted);font-size:12px;font-weight:600}

/* ---------- cta band ---------- */
.cta-band{
  margin-top:clamp(48px,6vw,80px);
  background:var(--primary-soft);border-radius:var(--r-card);
  padding:clamp(26px,3.6vw,44px);
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
}
.cta-band h2{font-size:26px;line-height:1.4}
.cta-band p{margin:10px 0 0;font-size:15px;color:var(--text);max-width:640px}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{
  background:var(--surface);border-top:1px solid var(--line);
  margin-top:clamp(56px,7vw,88px);padding-top:56px;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand p{margin:14px 0 0;font-size:14px;line-height:1.85;color:var(--muted);max-width:330px}
.footer-title{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:14px}
.footer-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.footer-list a{font-size:14px;color:var(--text)}
.footer-list a:hover{color:var(--primary)}
.footer-contact .row{display:flex;gap:6px;font-size:14px;color:var(--muted);margin-bottom:8px}
.footer-contact b{color:var(--ink);font-weight:600}
.footer-bottom{
  margin-top:40px;padding:18px 0;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}

/* ---------- mobile bottom bar ---------- */
.mobile-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;
  height:60px;padding:8px 16px;gap:12px;align-items:center;
  background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 18px rgba(16,32,64,.08);
}
.mobile-bar .btn-c{flex:1 1 auto;height:44px;font-size:15px}
.mobile-bar .link{font-size:14px;font-weight:600;color:var(--primary);white-space:nowrap}

/* ---------- responsive ---------- */
@media (max-width:991px){
  .nav-inner{height:60px;gap:14px}
  .nav-menu{
    position:fixed;top:60px;left:0;right:0;margin:0;
    flex-direction:column;align-items:stretch;gap:2px;
    background:#fff;padding:12px 16px 20px;
    border-bottom:1px solid var(--line);box-shadow:0 18px 30px rgba(16,32,64,.10);
    opacity:0;transform:translateY(-12px);pointer-events:none;
    transition:opacity .2s var(--ease),transform .2s var(--ease);
  }
  .nav-menu.is-open{opacity:1;transform:translateY(0);pointer-events:auto}
  .nav-link-c{padding:14px 12px;font-size:16px}
  .nav-link-c.is-active::after{display:none}
  .nav-link-c.is-active{background:var(--primary-soft)}
  .nav-cta-mobile{display:inline-flex;margin-top:10px}
  .nav-side .badge-status{display:none}
  .nav-side > .btn-accent{display:none}
  .nav-toggle{display:inline-flex}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  body{font-size:15px;padding-bottom:60px}
  .container{padding:0 16px}
  .article-head h1{font-size:28px;line-height:1.35}
  .article-body{font-size:15px;line-height:1.8;border-radius:var(--r-card)}
  .article-body h2{font-size:22px}
  .article-body h3{font-size:18px}
  .section-head h2{font-size:22px}
  .section-head p{font-size:14px}
  .card-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start}
  .cta-band h2{font-size:22px}
  .cta-actions{width:100%}
  .cta-actions .btn-c{width:100%}
  .article-foot .btn-c{width:100%}
  .mobile-bar{display:flex}
}
@media (max-width:519px){
  .brand-en{font-size:16px}
  .brand-cn{font-size:11px;letter-spacing:.6px}
  .brand-mark{width:34px;height:34px;font-size:17px}
  .article-head{padding:10px 0 28px}
  .article-meta{gap:10px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: category1 */
:root{
  --primary:#1C6FE0;
  --primary-dark:#1355B5;
  --primary-light:#E8F1FE;
  --accent:#FF6A2B;
  --accent-dark:#E0561C;
  --accent-light:#FFF1E9;
  --ok:#14B87A;
  --ok-bg:#E6F8F1;
  --warn:#F2A93B;
  --warn-bg:#FDF4E3;
  --text:#101F33;
  --body:#43536A;
  --muted:#8494A8;
  --line:#E6ECF3;
  --page:#F4F7FB;
  --card:#FFFFFF;
  --r-card:16px;
  --r-md:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,32,64,.05), 0 8px 24px rgba(16,32,64,.06);
  --sh-2:0 2px 6px rgba(16,32,64,.07), 0 14px 34px rgba(16,32,64,.10);
  --focus-ring:0 0 0 3px rgba(28,111,224,.28);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --sec:clamp(56px,7vw,88px);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--body);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary);text-decoration:none;transition:color .2s cubic-bezier(.4,0,.2,1),background-color .2s cubic-bezier(.4,0,.2,1)}
a:hover{color:var(--primary-dark)}
h1,h2,h3,h4,h5,h6{color:var(--text);margin:0;font-weight:700;letter-spacing:.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid rgba(28,111,224,.55);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:200;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s cubic-bezier(.4,0,.2,1);
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(16,32,64,.07)}
.nav-inner{display:flex;align-items:center;gap:22px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--text);white-space:nowrap}
.brand:hover{color:var(--text)}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;
  background:var(--primary);color:#fff;
  display:grid;place-items:center;font-size:18px;font-weight:800;line-height:1;
  box-shadow:0 6px 14px rgba(28,111,224,.28);
}
.brand-en{color:var(--primary)}
.brand-cn{color:var(--text);margin-left:6px}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link-c{
  position:relative;
  display:inline-flex;align-items:center;
  padding:10px 14px;border-radius:8px;
  font-size:15px;color:var(--body);font-weight:500;
}
.nav-link-c:hover{color:var(--primary);background:var(--primary-light)}
.nav-link-c.is-active{color:var(--primary);font-weight:600}
.nav-link-c.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--primary);border-radius:2px;
}
.nav-side{display:flex;align-items:center;gap:12px}
.badge-status{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--ok-bg);color:var(--ok);
  font-size:13px;font-weight:600;white-space:nowrap;
}
.badge-status .dot{width:6px;height:6px;border-radius:50%;background:var(--ok)}
.nav-toggle{
  display:none;width:44px;height:44px;
  border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);
  flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s}

/* ---------- 按钮 ---------- */
.btn-c{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s cubic-bezier(.4,0,.2,1),background-color .2s cubic-bezier(.4,0,.2,1),box-shadow .2s cubic-bezier(.4,0,.2,1),color .2s;
}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 8px 18px rgba(255,106,43,.20)}
.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(255,106,43,.26)}
.btn-accent:active{transform:translateY(1px)}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary-light);color:var(--primary-dark);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--text);border-color:var(--line)}
.btn-ghost:hover{color:var(--primary);border-color:var(--primary);transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn-c:focus-visible{box-shadow:var(--focus-ring)}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary)}
.text-link i{transition:transform .2s cubic-bezier(.4,0,.2,1)}
.text-link:hover i{transform:translateX(4px)}

/* ---------- 面包屑 ---------- */
.crumb{font-size:15px;color:var(--muted);padding:22px 0 0}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{margin:0 8px;color:#C3CEDA}
.crumb .current{color:var(--text);font-weight:600}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sec) 0}
.section-tight{padding:0 0 var(--sec)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  background:var(--primary-light);color:var(--primary);
  font-size:13px;font-weight:600;margin-bottom:14px;
}
.sec-head{margin-bottom:36px;max-width:800px}
.sec-head h2{font-size:28px;line-height:1.35}
.sec-desc{margin-top:12px;font-size:15px;color:var(--body)}
.sec-desc-sm{margin-top:10px;font-size:13px;color:var(--muted)}

/* ---------- Hero ---------- */
.hero-wrap{position:relative;overflow:hidden;background:linear-gradient(180deg,#EDF4FE 0%,#F4F7FB 48%,#FFFFFF 100%)}
.hero-wrap::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity:.10;pointer-events:none;
}
.hero-wrap > *{position:relative;z-index:1}
.cat-hero{padding:34px 0 var(--sec)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
.tag-pill{
  display:inline-flex;align-items:center;gap:6px;
  height:28px;padding:0 12px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;
  background:#fff;color:var(--body);border:1px solid var(--line);
}
.tag-pill i{color:var(--primary);font-size:12px}
.tag-pill.is-ok{background:var(--ok-bg);color:var(--ok);border-color:transparent}
.tag-pill.is-warn{background:var(--warn-bg);color:#B4780F;border-color:transparent}
.hero-grid h1{font-size:40px;line-height:1.25}
.hero-sub{margin-top:16px;font-size:17px;line-height:1.8;color:var(--body);max-width:560px}
.hero-actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px}
.hero-note{margin-top:16px;font-size:13px;color:var(--muted)}
.hero-media{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--sh-2);aspect-ratio:16/10;background:#fff}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{
  content:"";position:absolute;inset:auto 0 0 0;height:38%;
  background:linear-gradient(180deg,rgba(16,31,51,0) 0%,rgba(16,31,51,.42) 100%);
}
.hero-media figcaption{
  position:absolute;left:20px;bottom:16px;z-index:2;
  color:#fff;font-size:13px;letter-spacing:.02em;
}

/* ---------- 能力分组 ---------- */
.cap-grid{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.cap-item{
  display:flex;gap:18px;padding:28px;
  border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  background:#fff;
  transition:background-color .2s cubic-bezier(.4,0,.2,1);
}
.cap-item:hover{background:#FBFDFF}
.cap-ico{
  flex:0 0 44px;width:44px;height:44px;border-radius:12px;
  background:var(--primary-light);color:var(--primary);
  display:grid;place-items:center;font-size:18px;
}
.cap-num{
  font-variant-numeric:tabular-nums;
  font-size:13px;font-weight:700;color:var(--primary);opacity:.6;letter-spacing:.08em;
}
.cap-body h3{font-size:19px;font-weight:600;line-height:1.5;margin:6px 0 8px}
.cap-body p{font-size:15px;line-height:1.8}
.cap-item.is-wide{grid-column:1 / -1;align-items:center;gap:28px}
.cap-item.is-wide .cap-body{flex:1}
.cap-thumb{
  flex:0 0 300px;border-radius:var(--r-md);overflow:hidden;aspect-ratio:16/9;box-shadow:var(--sh-1);
}
.cap-thumb img{width:100%;height:100%;object-fit:cover}

/* ---------- 参数清单 ---------- */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.spec-card{background:var(--card);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:12px 28px}
.spec-row{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  min-height:52px;border-bottom:1px solid var(--line);font-size:15px;
}
.spec-row:last-child{border-bottom:0}
.spec-label{color:var(--muted);font-size:14px;display:inline-flex;align-items:center;gap:8px}
.spec-label i{color:var(--primary);font-size:13px}
.spec-value{color:var(--text);font-weight:600;text-align:right}
.spec-value em{font-style:normal;font-variant-numeric:tabular-nums}

/* ---------- 使用场景 ---------- */
.use-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.use-card{
  background:var(--card);border-radius:var(--r-card);padding:24px;
  box-shadow:var(--sh-1);
  transition:transform .2s cubic-bezier(.4,0,.2,1),box-shadow .2s cubic-bezier(.4,0,.2,1);
}
.use-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.use-card .use-ico{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  background:var(--accent-light);color:var(--accent);font-size:16px;margin-bottom:14px;
}
.use-card h3{font-size:17px;font-weight:600;margin-bottom:8px}
.use-card p{font-size:14px;line-height:1.8;color:var(--body)}

/* ---------- FAQ ---------- */
.accordion-item{
  border:0 !important;
  background:var(--card);
  border-radius:var(--r-card) !important;
  box-shadow:var(--sh-1);
  margin-bottom:12px;
  overflow:hidden;
  position:relative;
}
.accordion-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--primary);opacity:0;transition:opacity .2s cubic-bezier(.4,0,.2,1);
}
.accordion-item:has(.accordion-button:not(.collapsed))::before{opacity:1}
.accordion-button{
  padding:20px 24px;
  font-size:15.5px;font-weight:600;color:var(--text);
  background:#fff;
  box-shadow:none !important;
  border-radius:var(--r-card) !important;
}
.accordion-button:not(.collapsed){color:var(--primary);background:#fff}
.accordion-button::after{
  content:"";width:10px;height:10px;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:rotate(45deg);
  background-image:none !important;
  transition:transform .2s cubic-bezier(.4,0,.2,1),border-color .2s;
  margin-left:auto;
}
.accordion-button:not(.collapsed)::after{transform:rotate(-135deg);border-color:var(--primary)}
.accordion-button:focus{outline:none}
.accordion-button:focus-visible{box-shadow:var(--focus-ring) !important}
.accordion-body{padding:0 24px 22px;font-size:15px;line-height:1.85;color:var(--body)}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--primary-light);
  border-radius:20px;
  padding:44px;
  display:flex;align-items:center;justify-content:space-between;gap:40px;
}
.cta-band h2{font-size:28px;line-height:1.35}
.cta-band .cta-desc{margin-top:12px;font-size:15px;color:var(--body);max-width:520px}
.cta-actions{display:flex;flex-direction:column;gap:16px;align-items:flex-end}
.cta-btns{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}
.qr-box{
  width:120px;height:120px;border-radius:var(--r-md);background:#fff;
  display:grid;place-items:center;gap:4px;
  box-shadow:var(--sh-1);padding:10px;text-align:center;
}
.qr-box i{font-size:34px;color:var(--text);opacity:.82}
.qr-box span{font-size:11px;color:var(--muted);line-height:1.5}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:64px 0 22px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand p{margin-top:14px;font-size:14px;line-height:1.85;color:var(--body);max-width:320px}
.footer-title{font-size:15px;font-weight:700;color:var(--text);margin-bottom:14px}
.footer-list{display:flex;flex-direction:column;gap:10px}
.footer-list a{font-size:14px;color:var(--body)}
.footer-list a:hover{color:var(--primary)}
.footer-contact .row{display:flex;gap:8px;font-size:14px;color:var(--body);margin-bottom:10px;line-height:1.7}
.footer-contact b{color:var(--text);font-weight:600;white-space:nowrap}
.footer-bottom{
  margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}

/* ---------- 移动底部条 ---------- */
.mobile-bar{display:none}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hero-grid{gap:36px}
}
@media (max-width:991px){
  .nav-toggle{display:flex}
  .nav-menu{
    position:absolute;left:0;right:0;top:100%;
    display:none;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;padding:10px 16px 18px;
    border-bottom:1px solid var(--line);
    box-shadow:0 16px 32px rgba(16,32,64,.09);
  }
  .nav-menu.is-open{display:flex}
  .nav-link-c{height:48px;padding:0 14px;font-size:16px;border-radius:10px}
  .nav-link-c.is-active::after{display:none}
  .nav-link-c.is-active{background:var(--primary-light)}
  .badge-status{display:none}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-grid h1{font-size:34px}
  .hero-media{order:-1;aspect-ratio:16/9}
  .cap-item.is-wide{flex-direction:column;align-items:flex-start}
  .cap-thumb{flex:1 1 auto;width:100%}
  .spec-grid{grid-template-columns:1fr}
  .use-grid{grid-template-columns:1fr 1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:34px}
  .cta-actions{align-items:flex-start;width:100%}
  .cta-btns{justify-content:flex-start;width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  body{padding-bottom:60px;line-height:1.8;font-size:15px}
  .container{padding:0 16px}
  h1,.hero-grid h1{font-size:28px !important;line-height:1.3}
  .section{padding:56px 0}
  .section-tight{padding:0 0 56px}
  .cat-hero{padding:20px 0 56px}
  .sec-head h2,.cta-band h2{font-size:22px}
  .hero-sub{font-size:15px}
  .hero-actions .btn-c{width:100%}
  .cap-item{flex-direction:column;gap:14px;padding:24px 20px}
  .cap-body h3{font-size:18px}
  .spec-card{padding:10px 20px}
  .spec-row{flex-direction:column;align-items:flex-start;gap:2px;padding:12px 0;min-height:0}
  .spec-value{text-align:left}
  .use-grid{grid-template-columns:1fr}
  .cta-band{padding:26px 20px;border-radius:16px}
  .cta-btns .btn-c{width:100%}
  .qr-box{width:104px;height:104px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:6px}
  .mobile-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;height:60px;z-index:200;
    align-items:center;gap:12px;padding:8px 16px;
    background:rgba(255,255,255,.97);
    border-top:1px solid var(--line);
    box-shadow:0 -6px 20px rgba(16,32,64,.07);
  }
  .mobile-bar .btn-c{flex:1}
  .mobile-bar .txt-link{font-size:14px;white-space:nowrap}
}
@media (max-width:520px){
  .brand{font-size:16px}
  .brand-mark{width:30px;height:30px;flex:0 0 30px;font-size:16px}
  .brand-cn{margin-left:4px}
  .hero-tags{gap:8px}
  .btn-lg{height:48px;font-size:15px}
}

/* roulang page: category2 */
:root{
  --primary:#1C6FE0;
  --primary-dark:#1355B5;
  --primary-soft:#E8F1FE;
  --accent:#FF6A2B;
  --accent-dark:#E0561C;
  --accent-soft:#FFF1E9;
  --ok:#14B87A;
  --ok-soft:#E6F8F1;
  --ok-text:#0E8B5C;
  --warn:#F2A93B;
  --warn-soft:#FDF4E3;
  --title:#101F33;
  --text:#43536A;
  --muted:#8494A8;
  --line:#E6ECF3;
  --page:#F4F7FB;
  --card:#FFFFFF;
  --r-card:16px;
  --r-sm:12px;
  --r-btn:10px;
  --shadow-1:0 1px 2px rgba(16,32,64,.05),0 8px 24px rgba(16,32,64,.06);
  --shadow-2:0 2px 6px rgba(16,32,64,.07),0 14px 34px rgba(16,32,64,.10);
  --ease:cubic-bezier(.4,0,.2,1);
  --sec-space:clamp(56px,6vw,80px);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--page);
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;color:var(--title);font-weight:700;letter-spacing:.2px;}
h1{font-size:40px;line-height:1.25;}
h2{font-size:28px;line-height:1.35;}
h3{font-size:20px;line-height:1.5;font-weight:600;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
a{color:var(--primary);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--primary-dark);}
img{max-width:100%;display:block;}
ul{margin:0;padding:0;list-style:none;}
button{font:inherit;}
:focus-visible{outline:2px solid rgba(28,111,224,.28);outline-offset:2px;border-radius:6px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.num{font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 1px 2px rgba(16,32,64,.05),0 8px 24px rgba(16,32,64,.06);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:20px;
  font-weight:700;
  color:var(--title);
  white-space:nowrap;
}
.brand:hover{color:var(--title);}
.brand-mark{
  width:34px;
  height:34px;
  border-radius:10px;
  background:var(--primary);
  color:#fff;
  font-size:18px;
  font-weight:700;
  display:grid;
  place-items:center;
  line-height:1;
  box-shadow:0 4px 12px rgba(28,111,224,.25);
}
.brand-en{color:var(--primary);}
.brand-cn{color:var(--title);font-size:18px;margin-left:2px;}
.nav-menu{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:2px;
}
.nav-link-c{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:15px;
  color:var(--text);
  border-radius:8px;
  line-height:1.2;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link-c:hover{color:var(--primary);background:var(--primary-soft);}
.nav-link-c.is-active{color:var(--primary);font-weight:600;}
.nav-link-c.is-active::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:3px;
  height:2px;
  border-radius:2px;
  background:var(--primary);
}
.nav-side{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:12px;
}
.badge-status{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  background:var(--ok-soft);
  color:var(--ok-text);
  font-size:13px;
  font-weight:600;
  white-space:nowrap;
}
.badge-status .dot{
  width:7px;height:7px;border-radius:50%;background:var(--ok);
  box-shadow:0 0 0 3px rgba(20,184,122,.16);
}
.badge-soft{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:28px;
  padding:0 13px;
  border-radius:999px;
  background:var(--primary-soft);
  color:var(--primary-dark);
  font-size:13px;
  font-weight:600;
}
.badge-warm{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:28px;
  padding:0 13px;
  border-radius:999px;
  background:var(--accent-soft);
  color:var(--accent-dark);
  font-size:13px;
  font-weight:600;
}

/* ---------- buttons ---------- */
.btn-c{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border:1px solid transparent;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-c:hover{transform:translateY(-2px);}
.btn-c:active{transform:translateY(1px);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px;}
.btn-lg{height:52px;padding:0 28px;font-size:16px;}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,106,43,.22);}
.btn-accent:hover{background:var(--accent-dark);color:#fff;box-shadow:0 10px 24px rgba(255,106,43,.28);}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary);}
.btn-outline:hover{background:var(--primary-soft);color:var(--primary-dark);border-color:var(--primary-dark);}
.btn-ghost{background:transparent;color:var(--primary);height:auto;padding:6px 2px;}
.btn-ghost .arrow{transition:transform .2s var(--ease);}
.btn-ghost:hover .arrow{transform:translateX(4px);}
.btn-block{width:100%;}
.btn-group-c{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- nav toggle ---------- */
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line);
  border-radius:10px;
  background:#fff;
  padding:0;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle span{
  display:block;width:18px;height:2px;border-radius:2px;background:var(--title);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--primary);background:var(--primary-soft);}
.nav-open .nav-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-open .nav-toggle span:nth-child(2){opacity:0;}
.nav-open .nav-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- breadcrumb ---------- */
.crumb-wrap{padding:24px 0 0;}
.breadcrumb-crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
  font-size:15px;
  color:var(--muted);
}
.breadcrumb-crumb a{color:var(--muted);}
.breadcrumb-crumb a:hover{color:var(--primary);}
.breadcrumb-crumb .sep{color:#C6D2E0;font-size:13px;}
.breadcrumb-crumb .current{color:var(--title);font-weight:600;}

/* ---------- page hero ---------- */
.page-hero{
  padding:40px 0 8px;
}
.page-hero-inner{
  max-width:820px;
}
.page-hero h1{
  margin-bottom:18px;
}
.page-hero .lead{
  font-size:16px;
  color:var(--text);
  max-width:720px;
  margin-bottom:24px;
}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;}

/* ---------- section ---------- */
.section{padding:var(--sec-space) 0;}
.section-head{max-width:760px;margin-bottom:36px;}
.section-head h2{margin-bottom:12px;}
.section-head p{font-size:15px;color:var(--text);margin:0;}
.section-head .hint{font-size:13px;color:var(--muted);margin-top:10px;}

/* ---------- spec cards ---------- */
.spec-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.spec-card{
  background:var(--card);
  border-radius:var(--r-card);
  padding:26px 24px 20px;
  box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.spec-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.spec-top{
  display:flex;
  align-items:center;
  gap:12px;
  padding-bottom:18px;
  border-bottom:1px solid var(--line);
  margin-bottom:8px;
}
.spec-ico{
  width:44px;height:44px;
  border-radius:12px;
  background:var(--primary-soft);
  color:var(--primary);
  display:grid;
  place-items:center;
  flex:0 0 44px;
}
.spec-top h3{font-size:18px;margin:0;}
.spec-top .sub{font-size:12px;color:var(--muted);line-height:1.6;}
.spec-list li{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  min-height:44px;
  border-bottom:1px dashed var(--line);
  font-size:14px;
}
.spec-list li:last-child{border-bottom:0;}
.spec-list .k{color:var(--muted);}
.spec-list .v{color:var(--title);font-weight:600;font-size:15px;text-align:right;}

/* ---------- prepare split ---------- */
.split{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:44px;
  align-items:center;
}
.split-media{
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  background:#fff;
  aspect-ratio:4/3;
}
.split-media img{width:100%;height:100%;object-fit:cover;}
.split-body h2{margin-bottom:14px;}
.check-list{margin-top:22px;display:grid;gap:12px;}
.check-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:15px;
  color:var(--text);
}
.check-list .tick{
  flex:0 0 22px;
  width:22px;height:22px;
  margin-top:3px;
  border-radius:50%;
  background:var(--ok-soft);
  color:var(--ok-text);
  display:grid;
  place-items:center;
  font-size:12px;
  font-weight:700;
}
.check-list b{color:var(--title);font-weight:600;}

/* ---------- timeline ---------- */
.timeline{position:relative;max-width:900px;}
.timeline::before{
  content:"";
  position:absolute;
  left:21px;
  top:14px;
  bottom:18px;
  width:2px;
  background:var(--line);
}
.tl-item{
  position:relative;
  display:grid;
  grid-template-columns:44px 1fr;
  gap:22px;
  padding-bottom:30px;
}
.tl-item:last-child{padding-bottom:0;}
.tl-num{
  width:44px;height:44px;
  border-radius:12px;
  background:#fff;
  border:1px solid var(--line);
  color:var(--primary);
  display:grid;
  place-items:center;
  font-weight:700;
  font-size:15px;
  box-shadow:var(--shadow-1);
  position:relative;
  z-index:1;
}
.tl-item.is-key .tl-num{background:var(--primary);border-color:var(--primary);color:#fff;}
.tl-body{
  background:var(--card);
  border-radius:var(--r-card);
  padding:22px 24px;
  box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.tl-body:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.tl-body h3{margin-bottom:8px;font-size:18px;}
.tl-body p{font-size:15px;margin:0;}
.tl-meta{font-size:13px;color:var(--muted);margin-top:10px;}

/* ---------- faq ---------- */
.faq-accordion .accordion-item{
  border:0;
  border-radius:var(--r-card);
  background:#fff;
  box-shadow:var(--shadow-1);
  margin-bottom:12px;
  overflow:hidden;
}
.faq-accordion .accordion-item:last-child{margin-bottom:0;}
.faq-accordion .accordion-button{
  position:relative;
  background:#fff;
  color:var(--title);
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  padding:20px 56px 20px 26px;
  border-radius:var(--r-card);
  box-shadow:none;
  display:flex;
  align-items:center;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.faq-accordion .accordion-button:hover{background:#FBFCFE;}
.faq-accordion .accordion-button:not(.collapsed){color:var(--primary);background:#fff;}
.faq-accordion .accordion-button:focus{box-shadow:none;border-color:transparent;}
.faq-accordion .accordion-button::before{
  content:"";
  position:absolute;
  left:0;top:16px;bottom:16px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--primary);
  opacity:0;
  transition:opacity .2s var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed)::before{opacity:1;}
.faq-accordion .accordion-button::after{display:none;}
.q-icon{
  position:absolute;
  right:22px;
  top:50%;
  width:18px;height:18px;
  margin-top:-9px;
}
.q-icon::before,.q-icon::after{
  content:"";
  position:absolute;
  background:var(--primary);
  border-radius:2px;
  transition:transform .2s var(--ease);
}
.q-icon::before{left:0;top:8px;width:18px;height:2px;}
.q-icon::after{left:8px;top:0;width:2px;height:18px;}
.accordion-button:not(.collapsed) .q-icon::after{transform:scaleY(0);}
.faq-accordion .accordion-body{
  padding:0 26px 22px;
  font-size:15px;
  line-height:1.85;
  color:var(--text);
}
.faq-accordion .accordion-body p{margin:0;}

/* ---------- cta band ---------- */
.cta-band{
  background:linear-gradient(135deg,#E8F1FE 0%,#F2F7FE 100%);
  border-radius:20px;
  padding:40px;
  display:grid;
  grid-template-columns:1.5fr auto;
  gap:36px;
  align-items:center;
  box-shadow:var(--shadow-1);
}
.cta-band h2{margin-bottom:12px;}
.cta-band p{font-size:15px;color:var(--text);margin:0 0 22px;}
.cta-side{
  display:flex;
  align-items:center;
  gap:24px;
}
.qr-box{
  width:120px;
  height:120px;
  border-radius:var(--r-sm);
  background:#fff;
  box-shadow:var(--shadow-1);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px;
  text-align:center;
}
.qr-grid{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:3px;
  width:56px;
}
.qr-grid i{
  display:block;
  aspect-ratio:1/1;
  border-radius:2px;
  background:var(--primary);
  opacity:.85;
}
.qr-grid i:nth-child(3n){opacity:.25;}
.qr-grid i:nth-child(4n){opacity:.55;}
.qr-box span{font-size:11px;color:var(--muted);line-height:1.5;}

/* ---------- footer ---------- */
.site-footer{
  background:#fff;
  border-top:1px solid var(--line);
  padding:64px 0 0;
  margin-top:clamp(56px,6vw,80px);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:32px;
  padding-bottom:44px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text);max-width:300px;margin:0;}
.footer-title{
  font-size:15px;
  font-weight:600;
  color:var(--title);
  margin-bottom:14px;
}
.footer-list li{margin-bottom:2px;}
.footer-list a{
  font-size:14px;
  color:var(--text);
  line-height:2.2;
}
.footer-list a:hover{color:var(--primary);}
.footer-contact .row{
  font-size:14px;
  color:var(--text);
  margin-bottom:10px;
  line-height:1.7;
}
.footer-contact b{color:var(--title);font-weight:600;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--muted);
}

/* ---------- mobile bar ---------- */
.mobile-bar{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  height:60px;
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(10px);
  border-top:1px solid var(--line);
  box-shadow:0 -6px 20px rgba(16,32,64,.08);
  padding:0 16px;
  align-items:center;
  gap:14px;
  z-index:90;
}
.mobile-bar .btn-c{flex:1;height:44px;}
.mobile-bar-link{
  font-size:14px;
  font-weight:600;
  color:var(--primary);
  white-space:nowrap;
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .split{gap:32px;}
}
@media (max-width:991px){
  h1{font-size:32px;}
  h2{font-size:24px;}
  .nav-menu{
    position:fixed;
    left:0;right:0;
    top:72px;
    background:#fff;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:12px 20px 20px;
    border-bottom:1px solid var(--line);
    box-shadow:0 16px 32px rgba(16,32,64,.10);
    transform:translateY(-12px);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:transform .2s var(--ease),opacity .2s var(--ease),visibility .2s var(--ease);
    margin-left:0;
  }
  .nav-open .nav-menu{
    transform:translateY(0);
    opacity:1;
    visibility:visible;
    pointer-events:auto;
  }
  .nav-link-c{
    display:flex;
    align-items:center;
    min-height:48px;
    padding:0 12px;
    font-size:16px;
    border-radius:10px;
  }
  .nav-link-c.is-active::after{display:none;}
  .nav-link-c.is-active{background:var(--primary-soft);}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-side{margin-left:0;gap:8px;}
  .badge-status{display:none;}
  .spec-grid{grid-template-columns:repeat(2,1fr);}
  .split{grid-template-columns:1fr;gap:28px;}
  .split-media{aspect-ratio:16/9;}
  .cta-band{grid-template-columns:1fr;padding:32px;}
  .cta-side{justify-content:flex-start;flex-wrap:wrap;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
}
@media (max-width:767px){
  body{padding-bottom:72px;}
  .container{padding:0 16px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  h3{font-size:18px;}
  body{font-size:15px;line-height:1.8;}
  .nav-inner{height:60px;}
  .nav-menu{top:60px;}
  .brand{font-size:18px;}
  .brand-mark{width:30px;height:30px;font-size:16px;border-radius:9px;}
  .brand-cn{font-size:16px;}
  .nav-side .btn-sm{display:none;}
  .page-hero{padding:28px 0 4px;}
  .section{padding:56px 0;}
  .spec-grid{grid-template-columns:1fr;}
  .tl-item{grid-template-columns:38px 1fr;gap:16px;}
  .tl-num{width:38px;height:38px;font-size:14px;}
  .timeline::before{left:18px;}
  .tl-body{padding:18px 18px;}
  .faq-accordion .accordion-button{padding:18px 52px 18px 20px;font-size:15px;}
  .faq-accordion .accordion-body{padding:0 20px 18px;}
  .cta-band{padding:24px;border-radius:16px;}
  .btn-group-c{width:100%;}
  .btn-group-c .btn-c{width:100%;}
  .cta-side{width:100%;}
  .qr-box{margin:0 auto;}
  .mobile-bar{display:flex;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:24px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px;}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr;}
  .spec-card{padding:22px 18px 16px;}
  .split-media{aspect-ratio:3/2;}
}

/* roulang page: category3 */
:root{
  --primary:#1C6FE0;
  --primary-dark:#1355B5;
  --primary-soft:#E8F1FE;
  --accent:#FF6A2B;
  --accent-dark:#E0561C;
  --accent-soft:#FFF1E9;
  --ok:#14B87A;
  --ok-soft:#E6F8F1;
  --warn:#F2A93B;
  --warn-soft:#FDF4E3;
  --ink:#101F33;
  --text:#43536A;
  --muted:#8494A8;
  --line:#E6ECF3;
  --bg:#F4F7FB;
  --card:#FFFFFF;
  --focus:rgba(28,111,224,.28);
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh:0 1px 2px rgba(16,32,64,.05),0 8px 24px rgba(16,32,64,.06);
  --sh-hover:0 2px 6px rgba(16,32,64,.07),0 14px 34px rgba(16,32,64,.10);
  --ease:cubic-bezier(.4,0,.2,1);
  --sec:clamp(72px,8vw,96px);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--primary-dark)}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.35}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:6px}

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

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 1px 2px rgba(16,32,64,.05),0 8px 24px rgba(16,32,64,.06);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark{
  width:34px;height:34px;
  border-radius:11px;
  background:var(--primary);
  color:#fff;
  display:grid;place-items:center;
  font-weight:700;font-size:19px;
  line-height:1;
  letter-spacing:0;
  box-shadow:0 6px 16px rgba(28,111,224,.28);
}
.brand > span:last-child{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
}
.brand-en{
  font-size:20px;
  font-weight:700;
  color:var(--primary);
  letter-spacing:.02em;
  line-height:1.2;
}
.brand-cn{
  font-size:13px;
  font-weight:600;
  color:var(--ink);
  line-height:1.2;
}
.nav-menu{
  display:flex;
  align-items:center;
  gap:6px;
  margin:0 auto;
}
.nav-link-c{
  position:relative;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:var(--text);
  border-radius:8px;
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link-c:hover{color:var(--primary);background:var(--primary-soft)}
.nav-link-c.is-active{color:var(--primary);font-weight:600}
.nav-link-c.is-active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:-3px;
  height:2px;border-radius:2px;
  background:var(--primary);
}
.nav-side{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.badge-status{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:28px;
  padding:0 12px;
  border-radius:var(--r-pill);
  background:var(--ok-soft);
  color:#0E8A5C;
  font-size:13px;
  font-weight:600;
  white-space:nowrap;
}
.badge-status .dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--ok);
  box-shadow:0 0 0 3px rgba(20,184,122,.18);
}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  background:#fff;
  border-radius:12px;
  padding:0;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;border-radius:2px;
  background:var(--ink);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--primary);background:var(--primary-soft)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn-c{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-c:active{transform:translateY(1px)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,106,43,.22)}
.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(255,106,43,.26)}
.btn-outline{background:#fff;border-color:rgba(28,111,224,.35);color:var(--primary)}
.btn-outline:hover{background:var(--primary-soft);border-color:var(--primary);color:var(--primary-dark);transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn-block{width:100%}

/* ---------- 面包屑 ---------- */
.crumb-wrap{padding:22px 0 0}
.breadcrumb-c{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:15px;
  color:var(--muted);
}
.breadcrumb-c a{color:var(--muted)}
.breadcrumb-c a:hover{color:var(--primary)}
.breadcrumb-c .sep{color:#C7D2E0}
.breadcrumb-c .current{color:var(--ink);font-weight:600}

/* ---------- Hero ---------- */
.hero-help{
  padding:34px 0 0;
}
.hero-box{
  background:linear-gradient(180deg,#FFFFFF 0%,#F7FAFF 100%);
  border:1px solid var(--line);
  border-radius:24px;
  padding:clamp(28px,4vw,48px);
  box-shadow:var(--sh);
}
.hero-box h1{
  font-size:40px;
  line-height:1.25;
  margin-bottom:14px;
  letter-spacing:-.01em;
}
.hero-sub{
  font-size:16px;
  color:var(--text);
  max-width:760px;
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
}
.tag-pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:28px;
  padding:0 13px;
  border-radius:var(--r-pill);
  font-size:13px;
  font-weight:600;
  background:var(--primary-soft);
  color:var(--primary-dark);
}
.tag-pill.is-ok{background:var(--ok-soft);color:#0E8A5C}
.tag-pill.is-warm{background:var(--warn-soft);color:#A76A12}

/* ---------- 板块 ---------- */
.section{padding-top:var(--sec)}
.section-tight{padding-top:56px}
.section-head{
  margin-bottom:34px;
  max-width:760px;
}
.section-head h2{
  font-size:28px;
  line-height:1.35;
  margin-bottom:10px;
}
.section-head p{
  font-size:15px;
  color:var(--text);
}

/* ---------- 快捷入口 ---------- */
.quick-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.quick-card{
  display:flex;
  flex-direction:column;
  gap:10px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px 20px;
  box-shadow:var(--sh);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.quick-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh-hover);
  border-color:rgba(28,111,224,.35);
}
.quick-icon{
  width:38px;height:38px;
  border-radius:11px;
  display:grid;place-items:center;
  background:var(--primary-soft);
  color:var(--primary);
}
.quick-icon svg{width:19px;height:19px}
.quick-card h3{
  font-size:17px;
  font-weight:600;
}
.quick-card p{
  font-size:14px;
  line-height:1.75;
  color:var(--text);
}
.quick-card .more{
  margin-top:2px;
  font-size:13px;
  font-weight:600;
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.quick-card .more svg{width:14px;height:14px;transition:transform .2s var(--ease)}
.quick-card:hover .more svg{transform:translateX(4px)}

/* ---------- FAQ ---------- */
.faq-group + .faq-group{margin-top:56px}
.faq-group-title{
  font-size:22px;
  line-height:1.4;
  margin-bottom:8px;
}
.faq-group-desc{
  font-size:14px;
  color:var(--muted);
  margin-bottom:20px;
}
.faq-acc .accordion-item{
  position:relative;
  border:0;
  border-radius:var(--r-card);
  background:var(--card);
  box-shadow:var(--sh);
  margin-bottom:12px;
  overflow:hidden;
  transition:box-shadow .2s var(--ease),transform .2s var(--ease);
}
.faq-acc .accordion-item:hover{box-shadow:var(--sh-hover)}
.faq-acc .accordion-item::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:3px;
  background:var(--primary);
  opacity:0;
  transition:opacity .2s var(--ease);
  z-index:2;
}
.faq-acc .accordion-item:has(.accordion-button:not(.collapsed))::before{opacity:1}
.faq-acc .accordion-button{
  background:var(--card);
  color:var(--ink);
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  padding:20px 24px;
  border:0;
  border-radius:var(--r-card);
  box-shadow:none !important;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.faq-acc .accordion-button:not(.collapsed){color:var(--primary)}
.faq-acc .accordion-button:hover{color:var(--primary)}
.faq-acc .accordion-button::after{
  flex:0 0 auto;
  width:22px;height:22px;
  margin-left:auto;
  content:"";
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%238494A8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:center;
  background-size:16px 16px;
  transform:rotate(0deg);
  transition:transform .2s var(--ease),background-image .2s var(--ease);
}
.faq-acc .accordion-button:not(.collapsed)::after{
  transform:rotate(180deg);
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%231C6FE0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
}
.faq-acc .accordion-body{
  padding:0 24px 22px;
  font-size:15px;
  line-height:1.85;
  color:var(--text);
}
.faq-acc .accordion-body p + p{margin-top:10px}
.faq-acc .accordion-body strong{color:var(--ink);font-weight:600}

/* ---------- 联系区 ---------- */
.contact-band{
  background:#fff;
  border:1px solid var(--line);
  border-radius:20px;
  padding:clamp(24px,3.4vw,36px);
  display:grid;
  grid-template-columns:1fr auto;
  align-items:center;
  gap:22px;
  box-shadow:var(--sh);
}
.contact-band h2{
  font-size:22px;
  margin-bottom:8px;
}
.contact-band p{
  font-size:15px;
  color:var(--text);
}
.contact-note{
  grid-column:1 / -1;
  font-size:13px;
  color:var(--muted);
  padding-top:16px;
  border-top:1px solid var(--line);
}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(135deg,#E8F1FE 0%,#F5F9FF 100%);
  border-radius:24px;
  padding:clamp(28px,4vw,44px);
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,.72fr);
  gap:32px;
  align-items:center;
}
.cta-copy h2{
  font-size:28px;
  line-height:1.35;
  margin-bottom:12px;
}
.cta-copy p{
  font-size:15px;
  color:var(--text);
  max-width:520px;
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  margin-top:24px;
}
.cta-note{
  font-size:13px;
  color:var(--muted);
  width:100%;
}
.cta-media{
  border-radius:var(--r-card);
  overflow:hidden;
  background:#fff;
  box-shadow:var(--sh);
}
.cta-media img{
  width:100%;
  aspect-ratio:16 / 10;
  object-fit:cover;
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--sec);
  background:#fff;
  border-top:1px solid var(--line);
  padding:56px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:36px;
}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{
  font-size:14px;
  color:var(--text);
  max-width:340px;
}
.footer-title{
  font-size:15px;
  font-weight:700;
  color:var(--ink);
  margin-bottom:14px;
}
.footer-list li{margin-bottom:9px}
.footer-list a{
  font-size:14px;
  color:var(--text);
}
.footer-list a:hover{color:var(--primary)}
.footer-contact .row{
  display:flex;
  gap:6px;
  font-size:14px;
  margin-bottom:9px;
}
.footer-contact b{color:var(--ink);font-weight:600}
.footer-contact span{color:var(--text)}
.footer-bottom{
  margin-top:36px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  font-size:13px;
  color:var(--muted);
}

/* ---------- 移动底部条 ---------- */
.mobile-bar{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:1040;
  height:60px;
  padding:0 16px;
  align-items:center;
  gap:12px;
  background:rgba(255,255,255,.97);
  border-top:1px solid var(--line);
  box-shadow:0 -6px 20px rgba(16,32,64,.07);
}
.mobile-bar .btn-c{flex:1 1 auto}
.mobile-bar .bar-link{
  font-size:14px;
  font-weight:600;
  color:var(--primary);
  white-space:nowrap;
}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:991.98px){
  .nav-inner{height:60px;gap:12px}
  .nav-toggle{display:flex}
  .nav-menu{
    position:fixed;
    top:60px;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    margin:0;
    padding:12px 16px 20px;
    background:#fff;
    border-bottom:1px solid var(--line);
    box-shadow:0 14px 30px rgba(16,32,64,.10);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
  }
  .nav-menu.is-open{opacity:1;visibility:visible;transform:none}
  .nav-link-c{padding:13px 12px;font-size:16px;min-height:48px;display:flex;align-items:center}
  .nav-link-c.is-active{background:var(--primary-soft)}
  .nav-link-c.is-active::after{display:none}
  .nav-side .badge-status{display:none}
  .hero-box h1{font-size:32px}
  .cta-band{grid-template-columns:1fr}
  .cta-media{order:-1}
  .contact-band{grid-template-columns:1fr}
  .contact-band .btn-c{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767.98px){
  body{padding-bottom:84px}
  .container{padding:0 16px}
  .section{padding-top:56px}
  .section-tight{padding-top:48px}
  .hero-help{padding-top:22px}
  .crumb-wrap{padding-top:16px}
  .hero-box{border-radius:18px;padding:24px 20px}
  .hero-box h1{font-size:28px}
  .hero-sub{font-size:15px}
  .section-head h2{font-size:22px}
  .faq-group-title{font-size:19px}
  .quick-grid{grid-template-columns:1fr}
  .cta-copy h2{font-size:22px}
  .cta-actions .btn-c{width:100%}
  .contact-band h2{font-size:19px}
  .faq-acc .accordion-button{padding:16px 18px;font-size:15px}
  .faq-acc .accordion-body{padding:0 18px 18px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .nav-side .btn-c{display:none}
  .mobile-bar{display:flex}
}
@media (max-width:519.98px){
  .brand-cn{display:none}
  .hero-box h1{font-size:26px}
  .cta-band{border-radius:18px}
}