/* roulang page: index */
:root{
  --primary:#14566E;
  --primary-dark:#0E4256;
  --primary-soft:#EAF3F6;
  --primary-mask:rgba(20,86,110,.55);
  --accent:#D97A4A;
  --accent-soft:#FBEDE4;
  --bg:#F5F8F9;
  --card:#FFFFFF;
  --alt:#EDF3F5;
  --text:#14242B;
  --muted:#55696F;
  --faint:#8A9BA0;
  --line:#DEE7EA;
  --success:#2E8B62;
  --warn:#C25A3C;
  --r-card:14px;
  --r-img:16px;
  --r-btn:10px;
  --sh-sm:0 1px 2px rgba(20,36,43,.06);
  --sh-md:0 8px 24px rgba(20,36,43,.08);
  --sh-lg:0 18px 40px rgba(20,36,43,.10);
  --container:1200px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"Inter","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-0.01em;font-weight:700;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease-out;}
a:hover{color:var(--primary-dark);}
img{max-width:100%;display:block;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,textarea,select{font-family:inherit;font-size:16px;color:var(--text);}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--alt{background:var(--alt);}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section__kicker{display:block;font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:10px;}
.section__title{font-size:28px;}
.section__desc{margin-top:10px;font-size:14px;line-height:1.7;color:var(--muted);max-width:640px;}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--primary);white-space:nowrap;}
.link-arrow span{transition:transform .18s ease-out;}
.link-arrow:hover span{transform:translateX(4px);}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 28px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;line-height:1;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
  border:1px solid transparent;cursor:pointer;text-align:center;
}
.btn--primary{background:var(--primary);color:#fff;box-shadow:var(--sh-sm);}
.btn--primary:hover{background:var(--primary-dark);color:#fff;}
.btn--primary:active{transform:translateY(1px);}
.btn--ghost{background:#fff;color:var(--primary);border-color:var(--primary);}
.btn--ghost:hover{background:var(--primary-soft);color:var(--primary-dark);}
.btn--ghost:active{transform:translateY(1px);}
.btn--light{background:#fff;color:var(--primary);}
.btn--light:hover{background:var(--primary-soft);color:var(--primary-dark);}
.btn--sm{height:44px;padding:0 20px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;transform:none;}

/* 徽章 */
.badge{display:inline-flex;align-items:center;font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;background:var(--primary-soft);color:var(--primary);line-height:1.4;}
.badge--accent{background:var(--accent-soft);color:var(--accent);}
.badge--ghost{background:#fff;color:var(--primary);border:1px solid var(--line);}

/* 顶部信息条 */
.topbar{background:var(--primary-soft);border-bottom:1px solid rgba(20,86,110,.08);}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;height:36px;font-size:12px;color:var(--muted);}
.topbar__left{display:flex;align-items:center;gap:18px;}
.topbar__left span{display:inline-flex;align-items:center;gap:6px;}
.topbar__right{font-size:12px;font-weight:600;color:var(--primary);}
.topbar__right:hover{text-decoration:underline;}

/* 导航 */
.site-header{position:sticky;top:0;z-index:120;background:#fff;border-bottom:1px solid transparent;transition:box-shadow .2s ease-out,border-color .2s ease-out;}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--sh-md);}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);}
.logo:hover{color:var(--text);}
.logo__mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;letter-spacing:0;flex:none;}
.logo__text{display:flex;flex-direction:column;line-height:1.15;}
.logo__text strong{font-size:17px;font-weight:700;letter-spacing:-0.01em;}
.logo__text em{font-style:normal;font-size:11px;font-weight:400;color:var(--faint);letter-spacing:.04em;}
.nav{display:flex;align-items:center;gap:4px;}
.nav__link{position:relative;display:inline-flex;align-items:center;height:72px;padding:0 12px;font-size:15px;font-weight:500;color:var(--muted);white-space:nowrap;}
.nav__link::after{content:"";position:absolute;left:12px;right:12px;bottom:18px;height:2px;border-radius:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;}
.nav__link:hover{color:var(--primary);}
.nav__link:hover::after{transform:scaleX(1);}
.nav__link.is-active{color:var(--primary);font-weight:600;}
.nav__link.is-active::after{transform:scaleX(1);}
.header__cta{flex:none;}
.nav-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--primary);}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-mask{position:fixed;inset:0;background:rgba(14,66,86,.42);opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s;z-index:130;}
.nav-mask.is-open{opacity:1;visibility:visible;}

/* Hero */
.hero{padding:72px 0 96px;background:
  radial-gradient(900px 420px at 88% -10%,rgba(20,86,110,.10),transparent 62%),
  linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);}
.hero__grid{display:grid;grid-template-columns:55fr 45fr;gap:48px;align-items:start;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--primary);background:var(--primary-soft);padding:6px 14px;border-radius:999px;margin-bottom:20px;}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);}
.hero h1{font-size:44px;line-height:1.22;letter-spacing:-0.02em;}
.hero__sub{margin-top:18px;font-size:18px;line-height:1.7;color:var(--muted);max-width:560px;}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.metrics{display:flex;flex-wrap:wrap;gap:40px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line);}
.metrics li{display:flex;flex-direction:column;gap:2px;}
.metrics__num{font-size:28px;font-weight:700;color:var(--primary);line-height:1.2;letter-spacing:-0.02em;}
.metrics__label{font-size:13px;color:var(--faint);}
.hero__card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-lg);overflow:hidden;position:relative;top:-8px;}
.hero__media{position:relative;aspect-ratio:16/11;background:var(--alt);overflow:hidden;}
.hero__media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease-out;}
.hero__card:hover .hero__media img{transform:scale(1.03);}
.hero__panel{padding:22px 24px 24px;}
.hero__panel h2{font-size:20px;margin:12px 0 14px;}
.dash-list{display:flex;flex-direction:column;gap:10px;margin-bottom:20px;}
.dash-list li{position:relative;padding-left:16px;font-size:14px;line-height:1.7;color:var(--muted);}
.dash-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:2px;border-radius:2px;background:var(--accent);}

/* 信任条 */
.trust{padding:22px 0;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.trust__list{display:flex;align-items:center;gap:44px;overflow-x:auto;scrollbar-width:none;}
.trust__list::-webkit-scrollbar{display:none;}
.trust__item{flex:none;font-size:14px;font-weight:500;color:var(--muted);opacity:.6;transition:opacity .18s ease-out,color .18s ease-out;white-space:nowrap;display:inline-flex;align-items:center;gap:8px;}
.trust__item::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--faint);}
.trust__item:hover{opacity:1;color:var(--primary);}
.trust__item:hover::before{background:var(--accent);}

/* 精选网格 */
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gap);}
.card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-sm);overflow:hidden;transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#CFDDE1;}
.card__media{position:relative;aspect-ratio:16/10;background:var(--alt);overflow:hidden;}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease-out;}
.card:hover .card__media img{transform:scale(1.04);}
.card__media .badge{position:absolute;top:12px;left:12px;background:#fff;color:var(--primary);box-shadow:var(--sh-sm);}
.card__body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card__title{font-size:18px;font-weight:700;line-height:1.45;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card:hover .card__title{color:var(--primary);}
.card__desc{font-size:14px;line-height:1.7;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card__foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--faint);}
.card__foot .arrow{color:var(--primary);font-weight:700;transition:transform .18s ease-out;}
.card:hover .card__foot .arrow{transform:translateX(4px);}

/* 流程区 */
.flow{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.flow__media{border-radius:var(--r-img);overflow:hidden;aspect-ratio:4/3;background:var(--alt);box-shadow:var(--sh-md);}
.flow__media img{width:100%;height:100%;object-fit:cover;}
.steps{margin-top:32px;border-top:1px solid var(--line);}
.steps li{display:flex;gap:20px;padding:22px 0;border-bottom:1px solid var(--line);}
.steps__num{font-size:22px;font-weight:700;color:var(--accent);line-height:1.4;flex:none;width:38px;}
.steps__body h3{font-size:18px;margin-bottom:6px;}
.steps__body p{font-size:14px;line-height:1.7;color:var(--muted);}

/* 最新信息行列表 */
.newslist{border-top:1px solid var(--line);}
.newsrow{display:grid;grid-template-columns:1fr 240px 32px;gap:24px;align-items:center;padding:20px 8px;border-bottom:1px solid var(--line);transition:background-color .18s ease-out;}
.newsrow:hover{background:#fff;color:inherit;}
.newsrow__title{font-size:18px;font-weight:600;line-height:1.5;color:var(--text);display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;transition:color .18s ease-out;}
.newsrow:hover .newsrow__title{color:var(--primary);}
.newsrow__desc{margin-top:6px;font-size:14px;line-height:1.7;color:var(--muted);display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;}
.newsrow__meta{display:flex;align-items:center;gap:14px;justify-content:flex-end;font-size:13px;color:var(--faint);}
.newsrow__arrow{font-size:18px;font-weight:700;color:var(--primary);text-align:right;transition:transform .18s ease-out;}
.newsrow:hover .newsrow__arrow{transform:translateX(4px);}
.empty{height:180px;border:1px dashed #C3D4D9;border-radius:var(--r-card);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:var(--muted);background:#fff;}
.empty__icon{width:32px;height:32px;border-radius:8px;border:1.5px solid var(--primary);position:relative;opacity:.6;}
.empty__icon::before,.empty__icon::after{content:"";position:absolute;background:var(--primary);border-radius:2px;}
.empty__icon::before{left:7px;right:7px;top:10px;height:1.5px;}
.empty__icon::after{left:7px;right:13px;top:18px;height:1.5px;}
.empty p{font-size:14px;}

/* 评价轮播 */
.reviews{position:relative;}
.reviews__track{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 2px 18px;scrollbar-width:none;cursor:grab;}
.reviews__track::-webkit-scrollbar{display:none;}
.reviews__track.is-dragging{cursor:grabbing;scroll-snap-type:none;}
.review{flex:0 0 360px;scroll-snap-align:start;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-sm);padding:24px;display:flex;flex-direction:column;gap:14px;transition:box-shadow .18s ease-out,transform .18s ease-out;}
.review:hover{box-shadow:var(--sh-md);transform:translateY(-4px);}
.review__quote{font-size:34px;line-height:1;color:var(--accent);font-family:Georgia,serif;}
.review__text{font-size:15px;line-height:1.8;color:var(--muted);}
.review__foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);display:flex;align-items:center;gap:12px;}
.avatar{width:40px;height:40px;border-radius:999px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex:none;}
.avatar--accent{background:var(--accent-soft);color:var(--accent);}
.review__who strong{display:block;font-size:14px;font-weight:600;}
.review__who span{font-size:12px;color:var(--faint);}
.reviews__nav{display:flex;gap:10px;}
.rv-btn{width:44px;height:44px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:16px;transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;}
.rv-btn:hover{background:var(--primary);color:#fff;border-color:var(--primary);}
.rv-btn[disabled]{opacity:.4;pointer-events:none;}

/* 服务保障条 */
.guarantee{background:var(--primary-soft);}
.guarantee__grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));}
.guarantee__item{padding:8px 28px;border-left:1px solid rgba(20,86,110,.14);}
.guarantee__item:first-child{border-left:0;padding-left:0;}
.guarantee__icon{width:24px;height:24px;border:2px solid var(--primary);border-radius:6px;display:flex;align-items:center;justify-content:center;margin-bottom:12px;position:relative;}
.guarantee__icon::after{content:"";width:8px;height:8px;border-right:2px solid var(--primary);border-bottom:2px solid var(--primary);transform:rotate(-45deg) translate(1px,-1px);}
.guarantee__item h3{font-size:16px;font-weight:600;margin-bottom:6px;}
.guarantee__item p{font-size:13px;line-height:1.7;color:var(--muted);}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:360px 1fr;gap:56px;align-items:start;}
.faq-side{position:sticky;top:104px;}
.faq-side .section__title{font-size:28px;}
.faq-side p{margin-top:12px;font-size:14px;line-height:1.8;color:var(--muted);}
.faq-side .btn{margin-top:24px;}
.faq{border-top:1px solid var(--line);}
.faq__item{border-bottom:1px solid var(--line);}
.faq__q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 4px;font-size:16px;font-weight:600;text-align:left;color:var(--text);transition:color .18s ease-out;}
.faq__q:hover{color:var(--primary);}
.faq__item.is-open .faq__q{color:var(--primary);}
.faq__icon{flex:none;width:20px;height:20px;position:relative;transition:transform .2s ease-out;}
.faq__icon::before,.faq__icon::after{content:"";position:absolute;background:currentColor;border-radius:2px;}
.faq__icon::before{left:0;right:0;top:9px;height:2px;}
.faq__icon::after{top:0;bottom:0;left:9px;width:2px;transition:opacity .2s ease-out;}
.faq__item.is-open .faq__icon{transform:rotate(45deg);}
.faq__a{max-height:0;overflow:hidden;transition:max-height .2s ease-out;}
.faq__a p{font-size:14px;line-height:1.8;color:var(--muted);padding:0 4px 20px;}

/* CTA */
.cta-band{background:var(--primary);border-radius:var(--r-img);padding:40px;display:flex;align-items:center;justify-content:space-between;gap:32px;color:#fff;box-shadow:var(--sh-md);}
.cta-band h2{font-size:26px;color:#fff;}
.cta-band p{margin-top:8px;font-size:14px;line-height:1.7;color:rgba(255,255,255,.78);max-width:560px;}
.cta-band .btn--light{flex:none;}

/* 页脚 */
.site-footer{background:var(--primary-dark);color:#fff;padding:64px 0 0;margin-top:0;}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.footer__brand .logo__text strong{color:#fff;}
.footer__brand .logo__text em{color:rgba(255,255,255,.55);}
.footer__brand .logo__mark{background:rgba(255,255,255,.14);}
.footer__brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.68);max-width:300px;}
.footer__contact{margin-top:18px;display:flex;flex-direction:column;gap:8px;font-size:14px;color:rgba(255,255,255,.78);}
.footer__contact a{color:rgba(255,255,255,.78);}
.footer__contact a:hover{color:var(--accent);text-decoration:underline;}
.footer__social{display:flex;gap:10px;margin-top:18px;}
.footer__social span{width:34px;height:34px;border-radius:999px;border:1px solid rgba(255,255,255,.24);display:flex;align-items:center;justify-content:center;font-size:12px;color:rgba(255,255,255,.72);transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;}
.footer__social span:hover{background:var(--accent);border-color:var(--accent);color:#fff;}
.footer__col h3{font-size:14px;font-weight:600;letter-spacing:.06em;color:rgba(255,255,255,.55);margin-bottom:16px;}
.footer__col ul{display:flex;flex-direction:column;gap:10px;}
.footer__col a{font-size:14px;color:rgba(255,255,255,.8);}
.footer__col a:hover{color:var(--accent);text-decoration:underline;}
.footer__col li span{font-size:14px;color:rgba(255,255,255,.8);}
.footer__bottom{margin-top:48px;border-top:1px solid rgba(255,255,255,.14);padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;color:rgba(255,255,255,.6);}
.footer__bottom .to-top{color:rgba(255,255,255,.8);}
.footer__bottom .to-top:hover{color:var(--accent);text-decoration:underline;}

/* 图片加载失败占位 */
.img-fallback{background:var(--alt);display:flex;align-items:center;justify-content:center;color:var(--faint);font-size:12px;}

@media (max-width:1279px){
  .grid-4{grid-template-columns:repeat(3,minmax(0,1fr));}
  .hero h1{font-size:38px;}
}
@media (max-width:1023px){
  .section{padding:72px 0;}
  .hero{padding:56px 0 72px;}
  .hero__grid{grid-template-columns:1fr;gap:36px;}
  .hero__card{top:0;}
  .hero h1{font-size:34px;}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .flow{grid-template-columns:1fr;gap:36px;}
  .faq-wrap{grid-template-columns:1fr;gap:32px;}
  .faq-side{position:static;}
  .guarantee__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:0;}
  .guarantee__item{padding:20px 24px;border-left:1px solid rgba(20,86,110,.14);border-top:1px solid rgba(20,86,110,.14);}
  .guarantee__item:nth-child(odd){border-left:0;padding-left:0;}
  .guarantee__item:nth-child(-n+2){border-top:0;padding-top:0;}
  .newsrow{grid-template-columns:1fr 32px;gap:12px;padding:18px 4px;}
  .newsrow__meta{grid-column:1/2;justify-content:flex-start;}
  .newsrow__arrow{grid-column:2/3;grid-row:1/2;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
  .nav{position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:80px 24px 32px;transform:translateX(102%);transition:transform .26s ease-out;z-index:140;overflow-y:auto;box-shadow:var(--sh-lg);}
  .nav.is-open{transform:none;}
  .nav__link{height:auto;padding:16px 0;font-size:16px;border-bottom:1px solid var(--line);}
  .nav__link::after{display:none;}
  .nav__link.is-active{color:var(--primary);}
  .nav .header__cta{margin-top:24px;width:100%;}
  .nav .header__cta .btn{width:100%;}
  .nav-toggle{display:inline-flex;}
  .header__inner{height:60px;}
  .site-header .header__cta--desktop{display:none;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px;}
  .cta-band .btn--light{width:100%;}
}
@media (max-width:639px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .hero{padding:40px 0 56px;}
  .hero h1{font-size:28px;line-height:1.3;}
  .hero__sub{font-size:16px;}
  .metrics{gap:24px;margin-top:32px;}
  .metrics__num{font-size:22px;}
  .grid-4{grid-template-columns:1fr;}
  .section__head{flex-direction:column;align-items:flex-start;gap:12px;}
  .section__title{font-size:22px;}
  .review{flex:0 0 84vw;}
  .guarantee__grid{grid-template-columns:1fr;}
  .guarantee__item{padding:18px 0;border-left:0;border-top:1px solid rgba(20,86,110,.14);}
  .guarantee__item:first-child{border-top:0;}
  .footer__grid{grid-template-columns:1fr;}
  .footer__bottom{flex-direction:column;align-items:flex-start;gap:10px;}
  .logo__text strong{font-size:15px;}
  .logo__text em{font-size:10px;}
  .topbar__left{display:none;}
  .topbar__inner{justify-content:flex-end;}
  .cta-band h2{font-size:22px;}
  .flow__media{aspect-ratio:16/10;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;}
  .card:hover,.review:hover{transform:none;}
}

/* roulang page: article */
:root{
  --brand:#14566E;
  --brand-dark:#0E4256;
  --brand-soft:#EAF3F6;
  --accent:#D97A4A;
  --accent-soft:#FBEDE4;
  --bg:#F5F8F9;
  --card:#FFFFFF;
  --bg-alt:#EDF3F5;
  --ink:#14242B;
  --ink-2:#55696F;
  --ink-3:#8A9BA0;
  --line:#DEE7EA;
  --ok:#2E8B62;
  --warn:#C25A3C;
  --r-card:14px;
  --r-img:16px;
  --r-btn:10px;
  --sh-sm:0 1px 2px rgba(20,36,43,.06);
  --sh-md:0 8px 24px rgba(20,36,43,.08);
  --sh-lg:0 18px 40px rgba(20,36,43,.10);
  --ease:180ms ease-out;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Inter",system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em;font-weight:700}
p{margin:0}
figure{margin:0}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-soft);color:var(--brand-dark)}

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

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid transparent;
  transition:box-shadow var(--ease),border-color var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--sh-md)}
.header__inner{display:flex;align-items:center;gap:20px;height:72px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo__mark{
  width:36px;height:36px;border-radius:10px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-size:17px;font-weight:700;flex:0 0 auto;
}
.logo__text{display:flex;flex-direction:column;line-height:1.2}
.logo__text strong{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
.logo__text em{font-style:normal;font-size:11px;color:var(--ink-3);letter-spacing:.04em;margin-top:2px}
.nav{
  position:fixed;inset:0 0 0 auto;width:min(320px,86vw);z-index:70;
  background:#fff;display:flex;flex-direction:column;align-items:stretch;
  gap:4px;padding:88px 24px 32px;margin-left:auto;
  transform:translateX(100%);transition:transform .25s ease;
  box-shadow:var(--sh-lg);overflow-y:auto;
}
.nav.is-open{transform:translateX(0)}
body.nav-open{overflow:hidden}
body.nav-open::after{
  content:"";position:fixed;inset:0;background:rgba(20,36,43,.45);z-index:65;
}
.nav__link{
  position:relative;padding:14px 12px;font-size:16px;color:var(--ink-2);
  border-radius:10px;transition:color var(--ease),background var(--ease);
}
.nav__link:hover{color:var(--brand);background:var(--brand-soft)}
.nav__link.is-active{color:var(--brand);font-weight:600;background:var(--brand-soft)}
.nav__link.is-active::after{display:none}
.nav .header__cta{display:block;margin-top:16px}
.nav .header__cta .btn{width:100%}
.header__cta--desktop{display:none}
.nav-toggle{
  width:44px;height:44px;margin-left:auto;border:1px solid var(--line);
  border-radius:10px;display:grid;place-items:center;
  transition:background var(--ease),border-color var(--ease);
}
.nav-toggle:hover{background:var(--brand-soft);border-color:#CFDDE1}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:background .2s}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);
  border-radius:2px;transition:transform .2s;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}

@media(min-width:1024px){
  .nav{
    position:static;width:auto;transform:none;box-shadow:none;padding:0;
    flex-direction:row;align-items:center;gap:4px;overflow:visible;background:transparent;
  }
  .nav__link{padding:10px 12px;font-size:15px;border-radius:8px}
  .nav__link.is-active{background:transparent}
  .nav__link.is-active::after{
    display:block;content:"";position:absolute;left:12px;right:12px;bottom:2px;
    height:2px;background:var(--brand);border-radius:2px;
  }
  .nav .header__cta{display:none}
  .nav-toggle{display:none}
  body.nav-open::after{display:none}
  .header__cta--desktop{display:inline-flex;margin-left:12px}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh-sm)}
.btn--primary:hover{background:var(--brand-dark);box-shadow:var(--sh-md)}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn--ghost:hover{background:var(--brand-soft)}
.btn--ghost:active{transform:translateY(1px)}
.btn--sm{height:44px;padding:0 20px;font-size:14px}
.btn.is-disabled,.btn[disabled]{opacity:.5;pointer-events:none}

/* ---------- 通用标签 ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;background:var(--brand-soft);color:var(--brand);letter-spacing:.01em;
}
.badge--accent{background:var(--accent-soft);color:var(--accent)}
.badge--solid{background:var(--brand);color:#fff}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:24px 0 0;font-size:13px;color:var(--ink-3)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb a{transition:color var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb li{display:flex;align-items:center;gap:8px;max-width:100%}
.breadcrumb li+li::before{content:"/";color:#C6D4D8}
.breadcrumb li span{max-width:230px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------- 文章头 ---------- */
.article-head{padding:28px 0 0;max-width:820px}
.article-title{margin-top:16px;font-size:24px;line-height:1.35;font-weight:700;color:var(--ink)}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px;margin-top:16px;font-size:14px;color:var(--ink-3)}
.article-meta span{display:inline-flex;align-items:center}
.article-meta span+span::before{content:"·";margin-right:8px;color:#C6D4D8}
.article-rule{margin-top:24px;height:1px;background:var(--line)}
@media(min-width:1024px){
  .article-head{padding-top:32px}
  .article-title{font-size:34px}
}

/* ---------- 正文区 ---------- */
.article-section{padding:32px 0 0}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:48px}
.article-figure{max-width:780px;margin:32px auto 0}
.article-figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img);
  background:#E6EDF0;box-shadow:var(--sh-sm);
}
.article-figure figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:10px;line-height:1.7}
.article-body{
  max-width:780px;margin:0 auto;font-size:16px;line-height:1.9;color:var(--ink);
  overflow-wrap:break-word;
}
.article-body > *+*{margin-top:18px}
.article-body h2{
  font-size:22px;line-height:1.4;margin-top:40px;margin-bottom:14px;
  padding-left:12px;border-left:4px solid var(--brand);color:var(--ink);
}
.article-body h3{font-size:18px;line-height:1.5;margin-top:28px;margin-bottom:10px;color:var(--ink)}
.article-body h4{font-size:16px;margin-top:22px;margin-bottom:8px}
.article-body p{margin:0}
.article-body ul,.article-body ol{margin-top:18px;padding-left:24px;line-height:1.9}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li+li{margin-top:8px}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{
  margin:24px 0 0;padding:20px;background:#F7F9FA;border-left:3px solid var(--accent);
  border-radius:0 12px 12px 0;color:var(--ink-2);
}
.article-body blockquote p{margin:0}
.article-body img{border-radius:12px;margin:24px 0 0;height:auto}
.article-body figure{margin:24px 0 0}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:8px}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-dark)}
.article-body strong{font-weight:600;color:var(--ink)}
.article-body table{width:100%;margin-top:24px;font-size:15px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--brand-soft);color:var(--brand-dark);font-weight:600}
.article-body hr{border:0;height:1px;background:var(--line);margin:32px 0}
.article-body code{background:var(--bg-alt);padding:2px 6px;border-radius:6px;font-size:14px}

/* 目录 */
.toc{display:none}
@media(min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,1fr) 240px;align-items:start}
  .toc{
    display:block;position:sticky;top:96px;align-self:start;font-size:14px;
    border-left:1px solid var(--line);padding-left:16px;
  }
  .toc h2{font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--ink-3);margin-bottom:12px}
  .toc a{
    display:block;padding:6px 0 6px 12px;margin-left:-17px;border-left:2px solid transparent;
    color:var(--ink-2);line-height:1.6;transition:color var(--ease),border-color var(--ease);
  }
  .toc a:hover{color:var(--brand)}
  .toc a.is-current{color:var(--brand);border-left-color:var(--brand);font-weight:600}
}

/* 空态 */
.empty-state{
  max-width:780px;margin:32px auto 0;min-height:180px;padding:32px 24px;
  border:1px dashed var(--line);border-radius:var(--r-card);background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  color:var(--ink-2);font-size:14px;text-align:center;
}
.empty-state svg{color:var(--ink-3)}
.empty-state p{font-size:16px;font-weight:600;color:var(--ink)}

/* 文末操作区 */
.article-foot{max-width:780px;margin:48px auto 0;padding-top:28px;border-top:1px solid var(--line)}
.article-foot h2{font-size:14px;font-weight:600;color:var(--ink-3);letter-spacing:.08em;margin-bottom:12px}
.tag-list{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  background:var(--bg-alt);color:var(--ink-2);font-size:13px;
  transition:background var(--ease),color var(--ease);
}
.tag:hover{background:var(--brand-soft);color:var(--brand)}
.article-foot__actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:22px}
.prev-next{display:grid;gap:16px;margin-top:24px;grid-template-columns:1fr}
.prev-next__item{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 20px;box-shadow:var(--sh-sm);
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.prev-next__item:hover{box-shadow:var(--sh-md);transform:translateY(-4px);border-color:#CFDDE1}
.prev-next__label{display:block;font-size:12px;font-weight:600;color:var(--ink-3);letter-spacing:.08em}
.prev-next__title{
  display:block;margin-top:6px;font-size:16px;font-weight:600;color:var(--ink);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  transition:color var(--ease);
}
.prev-next__item:hover .prev-next__title{color:var(--brand)}
@media(min-width:768px){.prev-next{grid-template-columns:1fr 1fr}}

/* ---------- 相关推荐 ---------- */
.related{padding:72px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px}
.section-head h2{font-size:24px;color:var(--ink)}
.section-head p{font-size:14px;color:var(--ink-2);margin-top:6px}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  color:var(--brand);white-space:nowrap;
}
.link-more .arrow{transition:transform var(--ease)}
.link-more:hover .arrow{transform:translateX(4px)}
.link-more:hover{color:var(--brand-dark)}
@media(min-width:1024px){.section-head h2{font-size:28px}}

.card-grid{display:grid;gap:24px;grid-template-columns:1fr}
.card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-sm);
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.card:hover{box-shadow:var(--sh-md);transform:translateY(-4px);border-color:#CFDDE1}
.card__media{position:relative;aspect-ratio:16/10;background:#E6EDF0;overflow:hidden}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.card:hover .card__media img{transform:scale(1.03)}
.card__badge{position:absolute;top:12px;left:12px}
.card__body{padding:20px;display:flex;flex-direction:column;gap:8px;flex:1}
.card__title{
  font-size:18px;font-weight:700;line-height:1.4;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color var(--ease);
}
.card:hover .card__title{color:var(--brand)}
.card__desc{
  font-size:14px;line-height:1.7;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card__foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}
@media(min-width:640px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}

/* ---------- 底部 CTA ---------- */
.cta-band{padding:72px 0 0}
.cta-band__inner{
  background:var(--brand);border-radius:16px;padding:40px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
}
.cta-band h2{color:#fff;font-size:22px}
.cta-band p{color:rgba(255,255,255,.78);font-size:14px;margin-top:8px;max-width:520px}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-band .btn--ghost{background:#fff;border-color:#fff;color:var(--brand)}
.cta-band .btn--ghost:hover{background:var(--brand-soft)}
@media(max-width:639px){
  .cta-band__inner{padding:28px}
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-dark);color:#fff;margin-top:96px;padding:64px 0 0}
.footer__grid{display:grid;gap:40px;grid-template-columns:1fr}
.footer__brand .logo__mark{background:rgba(255,255,255,.14)}
.footer__brand .logo__text strong{color:#fff}
.footer__brand .logo__text em{color:rgba(255,255,255,.6)}
.footer__brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:320px}
.footer__contact{margin-top:16px;display:flex;flex-direction:column;gap:6px;font-size:14px;color:rgba(255,255,255,.72)}
.footer__contact a{transition:color var(--ease)}
.footer__contact a:hover{color:var(--accent)}
.footer__social{margin-top:16px;display:flex;flex-wrap:wrap;gap:10px;font-size:12px}
.footer__social span{padding:4px 10px;border-radius:999px;background:rgba(255,255,255,.1);color:rgba(255,255,255,.82)}
.footer__col h3{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;letter-spacing:.02em}
.footer__col ul{display:flex;flex-direction:column;gap:10px}
.footer__col a,.footer__col span{font-size:14px;color:rgba(255,255,255,.7);transition:color var(--ease)}
.footer__col a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.footer__bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.14);padding:20px 0;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(255,255,255,.6);
}
.to-top{color:rgba(255,255,255,.82);transition:color var(--ease)}
.to-top:hover{color:var(--accent)}
@media(min-width:640px){.footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.footer__grid{grid-template-columns:1.6fr 1fr 1fr 1fr}}

@media(max-width:639px){
  .container{padding:0 16px}
  .header__inner{height:60px}
  .article-section{padding-top:24px}
  .related,.cta-band{padding-top:56px}
  .site-footer{margin-top:56px;padding-top:48px}
}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .card:hover,.prev-next__item:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --primary:#14566E;
  --primary-dark:#0E4256;
  --primary-soft:#EAF3F6;
  --primary-mask:rgba(20,86,110,.55);
  --accent:#D97A4A;
  --accent-soft:#FBEDE4;
  --bg:#F5F8F9;
  --surface:#FFFFFF;
  --alt:#EDF3F5;
  --text:#14242B;
  --muted:#55696F;
  --faint:#8A9BA0;
  --line:#DEE7EA;
  --success:#2E8B62;
  --warn:#C25A3C;
  --r-card:14px;
  --r-img:16px;
  --r-btn:10px;
  --r-input:10px;
  --sh-sm:0 1px 2px rgba(20,36,43,.06);
  --sh-md:0 8px 24px rgba(20,36,43,.08);
  --sh-lg:0 18px 40px rgba(20,36,43,.10);
  --container:1200px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
body.nav-open{overflow:hidden}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section--tight{padding:56px 0}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}
.section__title{font-size:28px;line-height:1.25;letter-spacing:-.01em;font-weight:700}
.section__desc{font-size:14px;color:var(--muted);line-height:1.7;margin-top:8px}
.link-more{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--primary);white-space:nowrap}
.link-more span{transition:transform .18s ease-out}
.link-more:hover span{transform:translateX(4px)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .12s ease-out,box-shadow .18s ease-out;
  text-align:center;
}
.btn--sm{height:44px;padding:0 20px;font-size:14px}
.btn--primary{background:var(--primary);color:#fff;box-shadow:var(--sh-sm)}
.btn--primary:hover{background:var(--primary-dark)}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost{background:var(--surface);color:var(--primary);border-color:var(--primary)}
.btn--ghost:hover{background:var(--primary-soft)}
.btn--light{background:#fff;color:var(--primary)}
.btn--light:hover{background:var(--primary-soft)}
.btn--block{width:100%}
.btn:disabled,.btn.is-disabled{opacity:.5;pointer-events:none}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:50;background:var(--surface);
  transition:box-shadow .2s ease-out,border-color .2s ease-out;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--sh-md)}
.header__inner{display:flex;align-items:center;gap:20px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo__mark{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  background:var(--primary);color:#fff;font-size:17px;font-weight:700;letter-spacing:.02em;
}
.logo__text{display:flex;flex-direction:column;line-height:1.2}
.logo__text strong{font-size:16px;font-weight:700;letter-spacing:-.01em}
.logo__text em{font-style:normal;font-size:11px;color:var(--faint);letter-spacing:.04em}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav__link{
  position:relative;padding:8px 11px;border-radius:8px;
  font-size:14.5px;font-weight:500;color:var(--muted);
  transition:color .18s ease-out,background-color .18s ease-out;
}
.nav__link:hover{color:var(--primary);background:var(--primary-soft)}
.nav__link.is-active{color:var(--primary);font-weight:600}
.nav__link.is-active::after{
  content:"";position:absolute;left:11px;right:11px;bottom:0;height:2px;
  background:var(--primary);border-radius:2px;
}
.nav .header__cta{display:none}
.header__cta--desktop{display:inline-flex;margin-left:12px}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);position:relative;cursor:pointer;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:50%;width:18px;height:2px;background:var(--primary);
  border-radius:2px;transform:translateX(-50%);transition:transform .2s ease-out,opacity .2s ease-out;
}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
body.nav-open .nav-toggle span{transform:translateX(-50%) rotate(45deg)}
body.nav-open .nav-toggle span::before{transform:translateY(6px) rotate(-90deg)}
body.nav-open .nav-toggle span::after{opacity:0}
body.nav-open::after{
  content:"";position:fixed;inset:0;background:rgba(14,66,86,.45);z-index:55;
}

/* ===== 面包屑与页头 ===== */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--faint);padding-top:24px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--text);font-weight:500}
.page-hero{padding:24px 0 8px}
.page-hero__inner{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap}
.page-hero__text{max-width:720px}
.page-hero h1{font-size:34px;line-height:1.25;letter-spacing:-.01em;font-weight:700;margin-bottom:12px}
.page-hero__lead{font-size:15.5px;color:var(--muted);line-height:1.9}
.page-hero__meta{display:flex;gap:16px;flex-wrap:wrap;margin-top:16px;font-size:13px;color:var(--faint)}
.page-hero__meta strong{color:var(--primary);font-weight:600}

/* ===== 分类主体布局 ===== */
.cat-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:32px;align-items:start;padding-bottom:8px}
.cat-aside{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px}
.filter-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:18px;box-shadow:var(--sh-sm)}
.filter__group + .filter__group{margin-top:18px;padding-top:18px;border-top:1px solid var(--line)}
.filter__label{font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--faint);margin-bottom:10px}
.filter__item{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:10px;
  padding:9px 12px;border-radius:8px;border:1px solid transparent;background:transparent;
  font-size:14px;color:var(--muted);cursor:pointer;text-align:left;
  transition:background-color .16s ease-out,color .16s ease-out;
}
.filter__item:hover{background:var(--primary-soft);color:var(--primary)}
.filter__item.is-active{background:var(--primary-soft);color:var(--primary);font-weight:600}
.filter__item .dot{width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.5}
.aside-help{background:var(--alt);border-radius:var(--r-card);padding:20px;border:1px solid var(--line)}
.aside-help h3{font-size:15px;font-weight:700;margin-bottom:8px}
.aside-help p{font-size:13px;color:var(--muted);line-height:1.8;margin-bottom:14px}
.filter-toggle{display:none}

/* ===== 条目卡片网格 ===== */
.grid-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px;flex-wrap:wrap}
.grid-head__count{font-size:13.5px;color:var(--muted)}
.grid-head__count b{color:var(--primary);font-size:15px}
.entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.entry-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-sm);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#CFDEE3}
.entry-card__media{position:relative;aspect-ratio:16/10;background:#E7EDEF;overflow:hidden}
.entry-card__media::before{
  content:"";position:absolute;inset:0;
  background:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48' viewBox='0 0 24 24' fill='none' stroke='%238A9BA0' stroke-width='1.4'%3E%3Crect x='3' y='4' width='18' height='16' rx='2'/%3E%3Cpath d='M3 15l5-5 4 4 3-3 6 6'/%3E%3Ccircle cx='8.5' cy='9' r='1.4'/%3E%3C/svg%3E") center/44px no-repeat;
}
.entry-card__media img{position:relative;width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.entry-card:hover .entry-card__media img{transform:scale(1.03)}
.entry-card__media img.img-fail{opacity:0}
.entry-card__badge{
  position:absolute;left:12px;top:12px;z-index:2;
  font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;
  background:rgba(255,255,255,.94);color:var(--primary);
}
.entry-card__badge--accent{background:var(--accent-soft);color:var(--accent)}
.entry-card__body{padding:16px 20px 0;flex:1 1 auto}
.entry-card__title{
  font-size:18px;font-weight:700;line-height:1.45;letter-spacing:-.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .16s ease-out;
}
.entry-card:hover .entry-card__title{color:var(--primary)}
.entry-card__desc{
  margin-top:8px;font-size:14px;line-height:1.75;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.entry-card__foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:16px;padding:12px 20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--faint);
}
.entry-card__arrow{display:inline-flex;align-items:center;transition:transform .18s ease-out,color .18s ease-out;color:var(--primary);font-weight:600}
.entry-card:hover .entry-card__arrow{transform:translateX(4px)}
.grid-empty{
  border:1px dashed var(--line);border-radius:var(--r-card);height:180px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  background:var(--surface);color:var(--muted);font-size:14px;text-align:center;padding:20px;
}
.grid-empty svg{width:32px;height:32px;stroke:var(--faint)}

/* ===== 服务保障条 ===== */
.guarantee{background:var(--primary-soft);border-radius:var(--r-card);padding:8px 0}
.guarantee__grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.guarantee__item{display:flex;gap:12px;padding:22px 20px;align-items:flex-start}
.guarantee__item + .guarantee__item{border-left:1px solid rgba(20,86,110,.14)}
.guarantee__item svg{width:24px;height:24px;stroke:var(--primary);flex:0 0 auto;margin-top:2px}
.guarantee__item h3{font-size:16px;font-weight:600;margin-bottom:2px}
.guarantee__item p{font-size:13px;color:var(--muted);line-height:1.6}

/* ===== FAQ ===== */
.faq-layout{display:grid;grid-template-columns:320px minmax(0,1fr);gap:48px;align-items:start}
.faq-intro{position:sticky;top:96px}
.faq-intro h2{font-size:28px;line-height:1.25;letter-spacing:-.01em;font-weight:700;margin-bottom:12px}
.faq-intro p{font-size:15px;color:var(--muted);line-height:1.9;margin-bottom:20px}
.faq-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-sm)}
.faq-item + .faq-item{border-top:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;line-height:1.6;
  transition:color .16s ease-out,background-color .16s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--primary);background:#F9FBFC}
.faq-item summary .plus{
  position:relative;flex:0 0 auto;width:20px;height:20px;border-radius:50%;
  border:1px solid var(--line);transition:transform .2s ease-out,border-color .2s ease-out;
}
.faq-item summary .plus::before,.faq-item summary .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--primary);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-item summary .plus::before{width:10px;height:1.6px}
.faq-item summary .plus::after{width:1.6px;height:10px;transition:opacity .2s ease-out}
.faq-item[open] summary{color:var(--primary)}
.faq-item[open] summary .plus{transform:rotate(45deg);border-color:var(--primary)}
.faq-item__answer{padding:0 22px 20px;font-size:14.5px;line-height:1.85;color:var(--muted)}
.faq-item[open] .faq-item__answer{animation:fadeIn .2s ease-out}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}

/* ===== 底部 CTA ===== */
.cta-bar{background:var(--primary);border-radius:var(--r-img);padding:40px;box-shadow:var(--sh-lg)}
.cta-bar__inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-bar h2{color:#fff;font-size:24px;line-height:1.3;letter-spacing:-.01em;font-weight:700}
.cta-bar p{color:rgba(255,255,255,.78);font-size:14px;margin-top:8px;line-height:1.8;max-width:560px}

/* ===== 页脚 ===== */
.site-footer{background:var(--primary-dark);color:#fff;margin-top:72px;padding:56px 0 24px}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:40px}
.site-footer .logo__mark{background:#fff;color:var(--primary-dark)}
.site-footer .logo__text strong{color:#fff}
.site-footer .logo__text em{color:rgba(255,255,255,.6)}
.footer__brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);margin:16px 0}
.footer__contact{display:flex;flex-direction:column;gap:4px;font-size:13.5px;color:rgba(255,255,255,.72)}
.footer__contact a:hover{color:var(--accent)}
.footer__social{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.footer__social span{
  font-size:12px;padding:4px 12px;border-radius:999px;
  border:1px solid rgba(255,255,255,.24);color:rgba(255,255,255,.8);
}
.footer__col h3{font-size:14px;font-weight:600;margin-bottom:14px;color:#fff}
.footer__col ul{display:flex;flex-direction:column;gap:10px}
.footer__col a,.footer__col span{font-size:13.5px;color:rgba(255,255,255,.7);transition:color .16s ease-out}
.footer__col a:hover{color:var(--accent);text-decoration:underline}
.footer__bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.16);
  font-size:13px;color:rgba(255,255,255,.6);
}
.footer__bottom .to-top{color:#fff;font-weight:600}
.footer__bottom .to-top:hover{color:var(--accent);text-decoration:underline}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  .entry-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cat-layout{grid-template-columns:240px minmax(0,1fr)}
}
@media (max-width:1023px){
  .section{padding:56px 0}
  .cat-layout{grid-template-columns:minmax(0,1fr)}
  .cat-aside{position:static;display:none}
  .cat-aside.is-open{display:flex}
  .filter-toggle{
    display:inline-flex;align-items:center;gap:8px;margin-bottom:20px;
    height:44px;padding:0 18px;border-radius:var(--r-btn);border:1px solid var(--primary);
    background:var(--surface);color:var(--primary);font-size:14px;font-weight:600;cursor:pointer;
  }
  .filter-toggle:hover{background:var(--primary-soft)}
  .faq-layout{grid-template-columns:minmax(0,1fr);gap:24px}
  .faq-intro{position:static}
  .guarantee__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .guarantee__item:nth-child(3){border-left:none}
  .guarantee__item:nth-child(n+3){border-top:1px solid rgba(20,86,110,.14)}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:900px){
  .header__inner{height:60px}
  .nav{
    position:fixed;top:0;right:0;z-index:60;
    width:min(340px,86vw);height:100vh;height:100dvh;
    background:var(--surface);flex-direction:column;align-items:stretch;
    gap:4px;padding:84px 20px 32px;overflow-y:auto;
    transform:translateX(100%);transition:transform .24s ease-out;
    box-shadow:var(--sh-lg);
  }
  body.nav-open .nav{transform:translateX(0)}
  .nav__link{padding:13px 14px;font-size:15.5px;border-radius:10px}
  .nav__link.is-active::after{display:none}
  .nav__link.is-active{background:var(--primary-soft)}
  .nav .header__cta{display:block;margin-top:16px}
  .nav .header__cta .btn{width:100%}
  .header__cta--desktop{display:none}
  .nav-toggle{display:block;z-index:61}
  .page-hero h1{font-size:28px}
}
@media (max-width:639px){
  .container{padding:0 16px}
  .entry-grid{grid-template-columns:minmax(0,1fr)}
  .page-hero h1{font-size:26px}
  .section__title{font-size:22px}
  .faq-intro h2{font-size:22px}
  .faq-item summary{font-size:15px;padding:16px 16px}
  .faq-item__answer{padding:0 16px 18px}
  .cta-bar{padding:28px 22px}
  .cta-bar h2{font-size:20px}
  .cta-bar .btn{width:100%}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .footer__brand{grid-column:1 / -1}
  .footer__bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .logo__text em{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .entry-card:hover{transform:none}
  .entry-card:hover .entry-card__media img{transform:none}
}

/* roulang page: category2 */
:root{
  --primary:#14566E;
  --primary-deep:#0E4256;
  --primary-soft:#EAF3F6;
  --primary-mask:rgba(20,86,110,.55);
  --accent:#D97A4A;
  --accent-soft:#FBEDE4;
  --bg:#F5F8F9;
  --surface:#FFFFFF;
  --surface-alt:#EDF3F5;
  --text:#14242B;
  --text-2:#55696F;
  --text-3:#8A9BA0;
  --line:#DEE7EA;
  --success:#2E8B62;
  --warning:#C25A3C;
  --radius-card:14px;
  --radius-lg:16px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(20,36,43,.06);
  --shadow-md:0 8px 24px rgba(20,36,43,.08);
  --shadow-lg:0 18px 40px rgba(20,36,43,.10);
  --font:"Inter","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
body.nav-open{overflow:hidden}
img{max-width:100%;display:block;background:var(--surface-alt);color:var(--text-3)}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{line-height:1.25;letter-spacing:-.01em;font-weight:700}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:52px;
  padding:0 28px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  white-space:nowrap;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn--primary{background:var(--primary);color:#fff}
.btn--primary:hover{background:var(--primary-deep);box-shadow:var(--shadow-md)}
.btn--primary:active{transform:translateY(1px);box-shadow:var(--shadow-sm)}
.btn--ghost{background:#fff;border-color:var(--primary);color:var(--primary)}
.btn--ghost:hover{background:var(--primary-soft)}
.btn--light{background:#fff;color:var(--primary)}
.btn--light:hover{background:var(--primary-soft);color:var(--primary-deep)}
.btn--sm{height:44px;padding:0 20px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;transform:none;box-shadow:none}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--primary);transition:color .18s ease}
.link-arrow span{transition:transform .18s ease}
.link-arrow:hover{color:var(--primary-deep)}
.link-arrow:hover span{transform:translateX(4px)}

/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-md)}
.header__inner{display:flex;align-items:center;gap:20px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo__mark{
  width:36px;height:36px;border-radius:10px;
  background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:700;font-size:17px;letter-spacing:.02em;
}
.logo__text{display:flex;flex-direction:column;line-height:1.2}
.logo__text strong{font-size:16px;font-weight:700;color:var(--text);letter-spacing:-.01em}
.logo__text em{font-style:normal;font-size:11px;font-weight:400;color:var(--text-3);margin-top:3px;letter-spacing:.02em}
.nav{flex:1 1 auto;display:flex;align-items:center;justify-content:center;gap:2px}
.nav__link{
  position:relative;
  padding:10px 12px;
  border-radius:8px;
  font-size:15px;
  font-weight:500;
  color:var(--text-2);
  transition:color .18s ease,background-color .18s ease;
  white-space:nowrap;
}
.nav__link:hover{color:var(--primary);background:var(--primary-soft)}
.nav__link.is-active{color:var(--primary);font-weight:600}
.nav__link.is-active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:0;
  height:2px;border-radius:2px;
  background:var(--primary);
}
.nav .header__cta{display:none}
.header__cta{display:inline-flex;flex:0 0 auto}
.header__cta--desktop{margin-left:4px}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);
  border-radius:10px;position:relative;
  transition:background-color .18s ease,border-color .18s ease;
}
.nav-toggle:hover{background:var(--primary-soft);border-color:var(--primary-soft)}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  display:block;width:20px;height:2px;border-radius:2px;background:var(--primary);
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span{position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
body.nav-open .nav-toggle span{background:transparent}
body.nav-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg)}
body.nav-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg)}
.nav-overlay{
  position:fixed;inset:0;z-index:110;
  background:rgba(14,66,86,.45);
  opacity:0;pointer-events:none;
  transition:opacity .25s ease;
}
body.nav-open .nav-overlay{opacity:1;pointer-events:auto}

/* Hero band */
.hero-band{padding:24px 0 0}
.page-hero{
  position:relative;
  min-height:340px;
  border-radius:var(--radius-lg);
  overflow:hidden;
  display:flex;
  align-items:center;
  background-image:
    linear-gradient(90deg,rgba(14,66,86,.88) 0%,rgba(20,86,110,.62) 52%,rgba(20,86,110,.32) 100%),
    url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  box-shadow:var(--shadow-lg);
}
.page-hero__inner{padding:56px 48px;max-width:760px;color:#fff}
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.78)}
.breadcrumb a{color:rgba(255,255,255,.86);transition:color .18s ease}
.breadcrumb a:hover{color:#fff;text-decoration:underline}
.breadcrumb .sep{color:rgba(255,255,255,.45)}
.breadcrumb .current{color:#fff;font-weight:500}
.page-hero h1{font-size:44px;color:#fff;margin:20px 0 14px;letter-spacing:-.02em}
.page-hero p{font-size:17px;line-height:1.8;color:rgba(255,255,255,.9);max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* Sections */
.section{padding:96px 0}
.section--tint{background:var(--surface-alt)}
.section--plain{background:var(--bg)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px}
.section-head h2{font-size:28px;color:var(--text)}
.section-head p{font-size:15px;color:var(--text-2);margin-top:10px;max-width:640px}
.section-head .link-arrow{flex:0 0 auto;padding-bottom:6px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--accent);text-transform:uppercase;margin-bottom:12px}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--accent)}

/* Badges */
.badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;line-height:1.6;background:var(--primary-soft);color:var(--primary)}
.badge--accent{background:var(--accent-soft);color:#B85F31}

/* Feature row cards */
.feature-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.feature-card{
  display:grid;
  grid-template-columns:40% 60%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  min-height:236px;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#CFDDE1}
.feature-card__media{position:relative;background:var(--surface-alt);overflow:hidden}
.feature-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.feature-card:hover .feature-card__media img{transform:scale(1.03)}
.feature-card__body{display:flex;flex-direction:column;gap:10px;padding:24px}
.feature-card__body h3{font-size:20px;color:var(--text)}
.feature-card__body p{font-size:14px;line-height:1.8;color:var(--text-2)}
.feature-card__body .link-arrow{margin-top:auto;padding-top:8px}
.feature-card__tag{align-self:flex-start}

/* Stats */
.stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.stat{display:flex;align-items:baseline;gap:14px;padding:30px 26px;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat__no{font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--accent)}
.stat__num{font-size:36px;font-weight:700;color:var(--primary);line-height:1.1}
.stat__label{font-size:13px;color:var(--text-2);line-height:1.7}

/* Checklist */
.checklist-layout{display:grid;grid-template-columns:300px minmax(0,1fr);gap:56px;align-items:start}
.checklist-aside{position:sticky;top:104px}
.checklist-aside h2{font-size:28px;margin-bottom:14px}
.checklist-aside p{font-size:15px;line-height:1.9;color:var(--text-2);margin-bottom:22px}
.checklist{border-top:1px solid var(--line)}
.checklist li{
  display:grid;
  grid-template-columns:56px minmax(0,1fr) auto;
  gap:20px;
  align-items:start;
  padding:22px 4px;
  border-bottom:1px solid var(--line);
  transition:background-color .18s ease;
}
.checklist li:hover{background:rgba(255,255,255,.72)}
.checklist .num{font-size:22px;font-weight:700;color:var(--accent);line-height:1.2;letter-spacing:.02em}
.checklist h3{font-size:18px;margin-bottom:6px}
.checklist p{font-size:14px;line-height:1.8;color:var(--text-2)}
.checklist .link-arrow{padding-top:4px}

/* FAQ */
.faq-layout{display:grid;grid-template-columns:320px minmax(0,1fr);gap:56px;align-items:start}
.faq-aside h2{font-size:28px;margin-bottom:14px}
.faq-aside p{font-size:15px;line-height:1.9;color:var(--text-2)}
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:19px 2px;font-size:16px;font-weight:600;color:var(--text);
  cursor:pointer;list-style:none;
  transition:color .18s ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::marker{content:""}
.faq summary:hover{color:var(--primary)}
.faq summary::after{
  content:"+";
  flex:0 0 auto;
  width:26px;height:26px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:50%;
  font-size:18px;font-weight:500;color:var(--primary);
  transition:transform .2s ease,color .2s ease,border-color .2s ease,background-color .2s ease;
}
.faq details[open] summary{color:var(--primary)}
.faq details[open] summary::after{
  transform:rotate(45deg);
  color:#fff;background:var(--primary);border-color:var(--primary);
}
.faq__answer{padding:0 2px 20px;font-size:14px;line-height:1.85;color:var(--text-2)}

/* CTA */
.cta-wrap{padding:0 0 96px}
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  background:var(--primary);
  border-radius:var(--radius-lg);
  padding:40px 44px;
  box-shadow:var(--shadow-lg);
  color:#fff;
}
.cta-band h2{font-size:24px;color:#fff;margin-bottom:8px}
.cta-band p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.82);max-width:640px}
.cta-band .btn{flex:0 0 auto}

/* Footer */
.site-footer{background:var(--primary-deep);color:#fff;padding:64px 0 0}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer__brand .logo{margin-bottom:16px}
.footer__brand .logo__mark{background:rgba(255,255,255,.14);color:#fff}
.footer__brand .logo__text strong{color:#fff}
.footer__brand .logo__text em{color:rgba(255,255,255,.58)}
.footer__brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.72);max-width:300px}
.footer__contact{display:flex;flex-direction:column;gap:6px;margin-top:18px;font-size:14px;color:rgba(255,255,255,.78)}
.footer__contact a{color:rgba(255,255,255,.88);transition:color .18s ease}
.footer__contact a:hover{color:var(--accent);text-decoration:underline}
.footer__social{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.footer__social span{
  display:inline-flex;align-items:center;justify-content:center;
  height:28px;padding:0 12px;border-radius:999px;
  border:1px solid rgba(255,255,255,.22);
  font-size:12px;color:rgba(255,255,255,.72);
}
.footer__col h3{font-size:14px;color:#fff;margin-bottom:16px;font-weight:600}
.footer__col li{margin-bottom:10px}
.footer__col a,.footer__col span{font-size:14px;color:rgba(255,255,255,.7);line-height:1.7;transition:color .18s ease}
.footer__col a:hover{color:var(--accent);text-decoration:underline}
.footer__bottom{
  margin-top:48px;
  padding:20px 0;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.6);
}
.to-top{color:rgba(255,255,255,.78);transition:color .18s ease}
.to-top:hover{color:var(--accent);text-decoration:underline}

@media (max-width:1279px){
  .section{padding:80px 0}
  .cta-wrap{padding-bottom:80px}
}
@media (max-width:1023px){
  .header__inner{height:64px}
  .nav{
    position:fixed;top:0;right:0;
    width:min(86vw,360px);height:100vh;
    background:#fff;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:4px;
    padding:88px 22px 32px;
    transform:translateX(105%);
    transition:transform .28s ease;
    box-shadow:var(--shadow-lg);
    overflow-y:auto;
    z-index:120;
  }
  .nav.is-open{transform:none}
  .nav__link{padding:15px 12px;border-bottom:1px solid var(--line);border-radius:0;font-size:16px}
  .nav__link:hover{background:var(--primary-soft)}
  .nav__link.is-active::after{display:none}
  .nav .header__cta{display:block;margin-top:20px}
  .nav .header__cta .btn{width:100%}
  .header__cta--desktop{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .section{padding:72px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px}
  .page-hero h1{font-size:36px}
  .checklist-layout{grid-template-columns:1fr;gap:32px}
  .checklist-aside{position:static}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .cta-wrap{padding-bottom:72px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .feature-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr}
  .stat{border-right:none;border-bottom:1px solid var(--line)}
  .stat:last-child{border-bottom:none}
}
@media (max-width:767px){
  .page-hero{min-height:320px}
  .page-hero__inner{padding:40px 24px}
  .page-hero h1{font-size:30px;margin:16px 0 12px}
  .page-hero p{font-size:15px}
  .feature-card__body{padding:22px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 26px}
  .cta-band .btn{width:100%}
  .footer__grid{grid-template-columns:1fr 1fr}
}
@media (max-width:639px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section-head h2{font-size:24px}
  .page-hero{border-radius:14px}
  .page-hero h1{font-size:28px}
  .hero-band{padding-top:16px}
  .hero-actions .btn{width:100%}
  .feature-card{grid-template-columns:1fr;min-height:0}
  .feature-card__media{aspect-ratio:16/10}
  .stat{padding:24px 20px}
  .checklist li{grid-template-columns:40px minmax(0,1fr);gap:14px}
  .checklist li .link-arrow{grid-column:2;padding-top:0}
  .faq summary{font-size:15px;padding:17px 0}
  .cta-wrap{padding-bottom:56px}
  .footer__grid{grid-template-columns:1fr;gap:28px}
  .footer__bottom{flex-direction:column;align-items:flex-start}
  .site-footer{padding-top:48px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important}
  .feature-card:hover{transform:none}
  .feature-card:hover .feature-card__media img{transform:none}
  .link-arrow:hover span{transform:none}
}

/* roulang page: category3 */
:root{
  --primary:#14566E;
  --primary-dark:#0E4256;
  --primary-soft:#EAF3F6;
  --primary-mask:rgba(20,86,110,.55);
  --accent:#D97A4A;
  --accent-soft:#FBEDE4;
  --bg:#F5F8F9;
  --surface:#FFFFFF;
  --alt:#EDF3F5;
  --text:#14242B;
  --text-2:#55696F;
  --text-3:#8A9BA0;
  --line:#DEE7EA;
  --success:#2E8B62;
  --warning:#C25A3C;
  --r-card:14px;
  --r-img:16px;
  --r-btn:10px;
  --r-input:10px;
  --sh-sm:0 1px 2px rgba(20,36,43,.06);
  --sh-md:0 8px 24px rgba(20,36,43,.08);
  --sh-lg:0 18px 40px rgba(20,36,43,.10);
  --font:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;height:auto;background:var(--alt)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 28px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;line-height:1;
  transition:background-color .18s ease-out,color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
  border:1px solid transparent;
}
.btn--sm{height:44px;padding:0 20px;font-size:14px}
.btn--primary{background:var(--primary);color:#fff;box-shadow:var(--sh-sm)}
.btn--primary:hover{background:var(--primary-dark);box-shadow:var(--sh-md)}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn--ghost:hover{background:var(--primary-soft)}
.btn--ghost:active{transform:translateY(1px)}
.btn--white{background:#fff;color:var(--primary-dark)}
.btn--white:hover{background:#F2F7F9;box-shadow:var(--sh-md)}
.btn--white:active{transform:translateY(1px)}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;transform:none;box-shadow:none}
.btn--link{
  display:inline-flex;align-items:center;gap:8px;height:auto;padding:0;
  color:var(--primary);font-size:15px;font-weight:600;
}
.btn--link::after{content:"→";transition:transform .18s ease-out}
.btn--link:hover::after{transform:translateX(4px)}

/* 头部 */
.site-header{
  position:sticky;top:0;z-index:100;background:#fff;
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease-out,border-color .2s ease-out;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--sh-md)}
.header__inner{display:flex;align-items:center;gap:24px;height:72px}
.logo{display:flex;align-items:center;gap:10px;flex:none}
.logo__mark{
  width:36px;height:36px;border-radius:10px;background:var(--primary);color:#fff;
  display:grid;place-items:center;font-size:18px;font-weight:700;flex:none;
}
.logo__text{display:flex;flex-direction:column;line-height:1.15}
.logo__text strong{font-size:16px;font-weight:700;letter-spacing:-.01em}
.logo__text em{font-style:normal;font-size:12px;color:var(--text-3);margin-top:2px}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav__link{
  position:relative;padding:8px 12px;border-radius:8px;
  font-size:15px;color:var(--text-2);
  transition:color .18s ease-out,background-color .18s ease-out;
}
.nav__link:hover{color:var(--primary);background:var(--primary-soft)}
.nav__link.is-active{color:var(--primary);font-weight:600}
.nav__link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-2px;height:2px;
  border-radius:2px;background:var(--primary);
}
.header__cta--desktop{margin-left:12px;flex:none}
.nav .header__cta{display:none}
.nav-toggle{
  display:none;width:44px;height:44px;margin-left:auto;
  align-items:center;justify-content:center;flex-direction:column;gap:0;
  border-radius:10px;
}
.nav-toggle span{position:relative;display:block;width:22px;height:2px;border-radius:2px;background:var(--text);transition:background-color .2s ease-out}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:22px;height:2px;border-radius:2px;
  background:var(--text);transition:transform .2s ease-out,top .2s ease-out;
}
.nav-toggle span::before{top:-7px}
.nav-toggle span::after{top:7px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

/* 页面头部 */
.page-hero{padding:48px 0 0}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.breadcrumb a{transition:color .18s ease-out}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--line)}
.page-hero h1{font-size:44px;line-height:1.2;max-width:820px}
.page-hero h1 .hl{color:var(--primary)}
.page-hero .lead{margin-top:18px;font-size:18px;color:var(--text-2);max-width:760px}
.page-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}

/* 指标卡 */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:40px}
.metric{
  background:var(--primary-soft);border:1px solid rgba(20,86,110,.08);
  border-radius:var(--r-card);padding:24px;
  transition:box-shadow .18s ease-out,transform .18s ease-out;
}
.metric:hover{box-shadow:var(--sh-md);transform:translateY(-4px)}
.metric__num{font-size:36px;font-weight:700;color:var(--primary);line-height:1.1;letter-spacing:-.02em}
.metric__label{font-size:13px;font-weight:600;color:var(--text);margin-top:10px}
.metric__desc{font-size:13px;color:var(--text-2);margin-top:4px;line-height:1.7}

/* 板块通用 */
.section{padding-top:96px}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section__title{font-size:28px}
.section__sub{margin-top:10px;font-size:16px;color:var(--text-2);max-width:660px}

/* 步骤列表 */
.steps{max-width:900px;border-top:1px solid var(--line)}
.step{
  display:grid;grid-template-columns:64px 1fr 132px;gap:24px;align-items:start;
  padding:22px 0;border-bottom:1px solid var(--line);
  transition:background-color .18s ease-out;
}
.step__num{font-size:22px;font-weight:700;color:var(--accent);line-height:1.35}
.step__title{font-size:18px;font-weight:600;transition:color .18s ease-out}
.step:hover .step__title{color:var(--primary)}
.step__desc{font-size:14px;color:var(--text-2);margin-top:6px;line-height:1.85}
.step__link{
  justify-self:end;align-self:center;display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--primary);
}
.step__link::after{content:"→";transition:transform .18s ease-out}
.step__link:hover::after{transform:translateX(4px)}

/* 图文区块 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split__media{position:relative}
.split__media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);
  box-shadow:var(--sh-md);
}
.split__media .tagline{
  position:absolute;left:16px;bottom:16px;
  background:rgba(255,255,255,.92);color:var(--primary);
  font-size:12px;font-weight:600;padding:6px 12px;border-radius:999px;
}
.split__body h2{font-size:28px}
.split__body p.split__lead{margin-top:12px;font-size:16px;color:var(--text-2)}
.module-list{margin-top:24px}
.module{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.module:first-child{border-top:1px solid var(--line)}
.module__idx{
  flex:none;width:28px;height:28px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary);
  display:grid;place-items:center;font-size:13px;font-weight:700;
}
.module h3{font-size:16px;font-weight:600}
.module p{font-size:14px;color:var(--text-2);margin-top:4px;line-height:1.8}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:320px 1fr;gap:48px;align-items:start}
.faq-side{position:sticky;top:96px}
.faq-side h2{font-size:28px}
.faq-side p{margin-top:12px;font-size:15px;color:var(--text-2)}
.faq-side .btn{margin-top:22px}
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-child{border-top:1px solid var(--line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;font-size:16px;font-weight:600;cursor:pointer;list-style:none;
  transition:color .18s ease-out;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:20px;line-height:1;color:var(--text-3);transition:transform .2s ease-out,color .2s ease-out}
.faq summary:hover{color:var(--primary)}
.faq details[open] summary{color:var(--primary)}
.faq details[open] summary::after{transform:rotate(45deg);color:var(--primary)}
.faq__body{padding:0 0 20px;font-size:14px;line-height:1.9;color:var(--text-2);max-width:720px}

/* CTA */
.cta{
  margin-top:96px;background:var(--primary);color:#fff;
  border-radius:var(--r-img);padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  box-shadow:var(--sh-lg);
}
.cta h2{font-size:24px;color:#fff}
.cta p{margin-top:8px;font-size:14px;color:rgba(255,255,255,.78);max-width:560px}
.cta .btn{flex:none}

/* 空态 */
.empty{
  border:1px dashed var(--line);border-radius:var(--r-card);
  min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:10px;text-align:center;padding:24px;color:var(--text-2);
}
.empty__icon{
  width:32px;height:32px;border-radius:8px;border:2px solid var(--text-3);
  display:grid;place-items:center;color:var(--text-3);font-size:16px;
}
.empty p{font-size:14px}

/* 页脚 */
.site-footer{background:var(--primary-dark);color:#fff;margin-top:96px;padding:64px 0 0}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer__brand .logo__mark{background:#fff;color:var(--primary-dark)}
.footer__brand .logo__text strong{color:#fff}
.footer__brand .logo__text em{color:rgba(255,255,255,.6)}
.footer__brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:300px}
.footer__contact{margin-top:16px;display:flex;flex-direction:column;gap:6px;font-size:14px;color:rgba(255,255,255,.72)}
.footer__contact a{transition:color .18s ease-out}
.footer__contact a:hover{color:var(--accent)}
.footer__social{margin-top:16px;display:flex;gap:10px}
.footer__social span{
  font-size:12px;padding:4px 12px;border-radius:999px;
  border:1px solid rgba(255,255,255,.24);color:rgba(255,255,255,.72);
}
.footer__col h3{font-size:14px;font-weight:600;letter-spacing:.02em;color:#fff;margin-bottom:16px}
.footer__col li{margin-bottom:12px;font-size:14px;color:rgba(255,255,255,.72)}
.footer__col a{transition:color .18s ease-out}
.footer__col a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px}
.footer__bottom{
  margin-top:48px;padding:20px 0;border-top:1px solid rgba(255,255,255,.16);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:rgba(255,255,255,.6);
}
.to-top{transition:color .18s ease-out}
.to-top:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px}

/* 响应式 */
@media (max-width:1279px){
  .header__inner{gap:16px}
  .nav__link{padding:8px 10px;font-size:14px}
}
@media (max-width:1023px){
  .header__inner{height:60px}
  .nav-toggle{display:inline-flex}
  .header__cta--desktop{display:none}
  .nav{
    position:fixed;top:60px;left:0;right:0;z-index:99;
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    margin-left:0;padding:12px 24px 24px;max-height:calc(100vh - 60px);overflow-y:auto;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-lg);
    opacity:0;visibility:hidden;transform:translateY(-12px);pointer-events:none;
    transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s ease-out;
  }
  .nav.is-open{opacity:1;visibility:visible;transform:none;pointer-events:auto}
  .nav__link{padding:14px 8px;border-bottom:1px solid var(--line);border-radius:0;font-size:16px}
  .nav__link.is-active::after{display:none}
  .nav .header__cta{display:block;margin-top:20px}
  .nav .header__cta .btn{width:100%}
  body.nav-open{overflow:hidden}
  .page-hero{padding-top:36px}
  .page-hero h1{font-size:34px}
  .section{padding-top:72px}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:32px}
  .split__body h2{font-size:24px}
  .faq-wrap{grid-template-columns:1fr;gap:28px}
  .faq-side{position:static}
  .step{grid-template-columns:56px 1fr;gap:16px}
  .step__link{grid-column:2;justify-self:start}
  .cta{margin-top:72px;flex-direction:column;align-items:flex-start;padding:32px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
  .site-footer{margin-top:72px}
}
@media (max-width:639px){
  .container{padding:0 16px}
  .page-hero h1{font-size:28px}
  .page-hero .lead{font-size:16px}
  .page-hero__actions .btn{width:100%}
  .metrics{grid-template-columns:1fr 1fr;gap:16px}
  .metric{padding:18px}
  .metric__num{font-size:28px}
  .section{padding-top:56px}
  .section__head{flex-direction:column;align-items:flex-start;gap:12px}
  .section__title{font-size:24px}
  .step__num{font-size:20px}
  .step__title{font-size:16px}
  .cta{margin-top:56px;padding:24px;border-radius:var(--r-card)}
  .cta h2{font-size:20px}
  .cta .btn{width:100%}
  .footer__grid{grid-template-columns:1fr 1fr;gap:24px}
  .footer__brand{grid-column:1 / -1}
  .footer__bottom{flex-direction:column;align-items:flex-start;margin-top:32px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.001ms !important;animation-duration:.001ms !important}
  .metric:hover,.step:hover{transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category4 */
:root{
  --primary:#14566E;
  --primary-dark:#0E4256;
  --primary-soft:#EAF3F6;
  --accent:#D97A4A;
  --accent-soft:#FBEDE4;
  --bg:#F5F8F9;
  --surface:#FFFFFF;
  --alt:#EDF3F5;
  --text:#14242B;
  --muted:#55696F;
  --weak:#8A9BA0;
  --line:#DEE7EA;
  --success:#2E8B62;
  --warn:#C25A3C;
  --r-card:14px;
  --r-img:16px;
  --r-btn:10px;
  --sh-sm:0 1px 2px rgba(20,36,43,.06);
  --sh-md:0 8px 24px rgba(20,36,43,.08);
  --sh-lg:0 18px 40px rgba(20,36,43,.10);
  --ease:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
body.nav-lock{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--primary-dark)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-0.01em;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* 顶部信息条 */
.topbar{background:var(--primary-soft);border-bottom:1px solid rgba(20,86,110,.08);font-size:13px;color:var(--muted)}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;height:36px;gap:16px}
.topbar__info{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar__link{font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
.topbar__link::after{content:"→";font-size:12px;transition:transform var(--ease)}
.topbar__link:hover::after{transform:translateX(4px)}

/* 主导航 */
.site-header{
  position:sticky;top:0;z-index:90;
  background:var(--surface);
  border-bottom:1px solid transparent;
  transition:box-shadow var(--ease),border-color var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--sh-md)}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text)}
.logo:hover{color:var(--text)}
.logo__mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:10px;
  background:var(--primary);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:18px;letter-spacing:0;
  box-shadow:var(--sh-sm);
}
.logo__text{display:flex;flex-direction:column;line-height:1.2}
.logo__text strong{font-size:17px;font-weight:700;letter-spacing:-0.01em}
.logo__text em{font-style:normal;font-size:11px;color:var(--weak);letter-spacing:.04em}
.nav{display:flex;align-items:center;gap:4px}
.nav__link{
  position:relative;
  display:inline-block;
  padding:10px 12px;
  font-size:15px;
  color:var(--muted);
  border-radius:8px;
  white-space:nowrap;
  transition:color var(--ease),background var(--ease);
}
.nav__link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.nav__link:hover{color:var(--primary);background:var(--primary-soft)}
.nav__link:hover::after,.nav__link.is-active::after{transform:scaleX(1)}
.nav__link.is-active{color:var(--primary);font-weight:600}
.nav .header__cta{display:none}
.header__cta--desktop{display:inline-flex}
.nav-toggle{
  display:none;
  width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
  background:var(--surface);cursor:pointer;position:relative;padding:0;
  transition:border-color var(--ease),background var(--ease);
}
.nav-toggle:hover{border-color:var(--primary);background:var(--primary-soft)}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--primary);border-radius:2px;
  transition:transform var(--ease),opacity var(--ease);
}
.nav-toggle span{top:50%;transform:translate(-50%,-50%)}
.nav-toggle span::before{content:"";left:0;top:-6px}
.nav-toggle span::after{content:"";left:0;top:6px}
.nav-toggle.is-open span{transform:translate(-50%,-50%) rotate(45deg)}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(-90deg)}
.nav-toggle.is-open span::after{opacity:0}
.nav-backdrop{
  position:fixed;inset:0;background:rgba(14,66,86,.45);
  opacity:0;pointer-events:none;transition:opacity var(--ease);z-index:70;
}
.nav-backdrop.is-open{opacity:1;pointer-events:auto}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 28px;
  border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;
  cursor:pointer;text-align:center;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn--primary{background:var(--primary);color:#fff;box-shadow:var(--sh-sm)}
.btn--primary:hover{background:var(--primary-dark);color:#fff;box-shadow:var(--sh-md)}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost{background:var(--surface);color:var(--primary);border-color:var(--primary)}
.btn--ghost:hover{background:var(--primary-soft);color:var(--primary-dark)}
.btn--ghost:active{transform:translateY(1px)}
.btn--light{background:#fff;color:var(--primary)}
.btn--light:hover{background:var(--primary-soft);color:var(--primary-dark)}
.btn--sm{height:44px;padding:0 20px;font-size:14px}
.btn--block{width:100%}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}

/* 徽章与标签 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1.6;
  background:var(--primary-soft);color:var(--primary);
}
.badge--accent{background:var(--accent-soft);color:var(--accent)}

/* 面包屑 */
.crumb{padding:22px 0 0;font-size:13px;color:var(--weak)}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb li{display:inline-flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:var(--line)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.crumb span{color:var(--text);font-weight:600}

/* 页面头部 */
.page-head{padding:26px 0 8px}
.page-head__inner{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.page-head h1{font-size:28px;font-weight:700;letter-spacing:-0.01em}
.page-head .lead{margin-top:12px;max-width:640px;color:var(--muted);font-size:15px;line-height:1.85}
.page-head__aside{display:flex;align-items:center;gap:12px;flex-wrap:wrap}

/* 主体两栏 */
.section{padding:56px 0 0}
.split{display:grid;grid-template-columns:minmax(0,1fr);gap:32px}
.article-body{min-width:0}
.article-body h2{font-size:22px;margin:0 0 6px}
.article-body .section-label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--accent);
  letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px;
}
.article-body .section-label::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px}
.note-block{
  background:#F8FBFC;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  margin-bottom:20px;
}
.note-block h2{font-size:18px;font-weight:600;margin-bottom:10px}
.note-block p{font-size:16px;line-height:1.9;color:var(--muted)}
.note-block p+p{margin-top:12px}
.note-block strong{color:var(--text);font-weight:600}

/* FAQ */
.faq-wrap{margin-top:36px}
.faq-wrap h2{font-size:22px;margin-bottom:6px}
.faq-wrap .faq-desc{color:var(--muted);font-size:14px;line-height:1.8;margin-bottom:16px}
.faq{border-top:1px solid var(--line)}
.faq__item{border-bottom:1px solid var(--line)}
.faq__q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;background:none;border:0;cursor:pointer;
  text-align:left;font-size:16px;font-weight:600;color:var(--text);
  transition:color var(--ease);
}
.faq__q:hover{color:var(--primary)}
.faq__icon{
  position:relative;flex:0 0 24px;width:24px;height:24px;border-radius:50%;
  background:var(--primary-soft);
  transition:transform 200ms ease,background var(--ease);
}
.faq__icon::before,.faq__icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--primary);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq__icon::before{width:12px;height:2px}
.faq__icon::after{width:2px;height:12px}
.faq__item.is-open .faq__q{color:var(--primary)}
.faq__item.is-open .faq__icon{transform:rotate(45deg);background:var(--accent-soft)}
.faq__item.is-open .faq__icon::before,.faq__item.is-open .faq__icon::after{background:var(--accent)}
.faq__a{max-height:0;overflow:hidden;transition:max-height 200ms ease}
.faq__a-inner{padding:0 44px 20px 0}
.faq__a-inner p{font-size:14px;line-height:1.8;color:var(--muted)}

/* 表单卡 */
.form-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-top:4px solid var(--primary);
  border-radius:var(--r-card);
  box-shadow:var(--sh-lg);
  padding:24px;
}
.form-card h2{font-size:20px;margin-bottom:8px}
.form-card .form-desc{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:20px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.field label{font-size:13px;font-weight:600;color:var(--muted)}
.field label .req{color:var(--accent)}
.field input,.field textarea{
  width:100%;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  padding:12px 14px;
  font-family:inherit;font-size:15px;line-height:1.6;
  color:var(--text);background:var(--surface);
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.field textarea{resize:vertical;min-height:96px}
.field input::placeholder,.field textarea::placeholder{color:var(--weak)}
.field input:hover,.field textarea:hover{border-color:#C7D6DB}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(20,86,110,.12);
}
.field.is-error input,.field.is-error textarea{border-color:var(--warn);background:#FDF6F3}
.field__err{display:none;font-size:12px;color:var(--warn)}
.field.is-error .field__err{display:block}
.form-hint{font-size:12px;color:var(--weak);line-height:1.7;margin-top:12px}
.form-msg{
  display:none;margin-top:14px;padding:12px 14px;
  border-radius:10px;background:var(--primary-soft);
  color:var(--primary-dark);font-size:13px;line-height:1.7;
}
.form-msg.is-show{display:block}

/* 相关栏目 */
.related{padding:64px 0 0}
.related__head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.related__head h2{font-size:24px}
.related__head p{font-size:14px;color:var(--muted)}
.card-grid{display:grid;grid-template-columns:repeat(1,minmax(0,1fr));gap:20px}
.card{
  display:flex;flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#CFDDE2}
.card__media{position:relative;aspect-ratio:16/10;background:#E8EFF1;overflow:hidden}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease}
.card:hover .card__media img{transform:scale(1.03)}
.card__media .badge{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94);color:var(--primary);box-shadow:var(--sh-sm)}
.card__body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.card__title{font-size:18px;font-weight:700;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card:hover .card__title{color:var(--primary)}
.card__desc{font-size:14px;line-height:1.7;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card__foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--weak);
}
.card__arrow{color:var(--primary);font-weight:600;transition:transform var(--ease)}
.card:hover .card__arrow{transform:translateX(4px)}

/* 底部 CTA */
.cta-band{margin:72px 0 0}
.cta-band__inner{
  background:var(--primary);
  border-radius:var(--r-img);
  padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  box-shadow:var(--sh-md);
}
.cta-band h2{color:#fff;font-size:24px;margin-bottom:8px}
.cta-band p{color:rgba(255,255,255,.78);font-size:14px;line-height:1.8;max-width:520px}

/* 页脚 */
.site-footer{margin-top:72px;background:var(--primary-dark);color:#fff;padding:56px 0 0;font-size:14px}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer__brand .logo{color:#fff;margin-bottom:14px}
.footer__brand .logo__mark{background:rgba(255,255,255,.14);box-shadow:none}
.footer__brand .logo__text strong{color:#fff}
.footer__brand .logo__text em{color:rgba(255,255,255,.55)}
.footer__brand p{color:rgba(255,255,255,.7);font-size:13px;line-height:1.8;max-width:280px}
.footer__contact{margin-top:14px;display:flex;flex-direction:column;gap:4px;font-size:13px;color:rgba(255,255,255,.72)}
.footer__contact a{color:#fff}
.footer__contact a:hover{color:var(--accent);text-decoration:underline}
.footer__social{margin-top:14px;display:flex;gap:8px;flex-wrap:wrap}
.footer__social span{
  display:inline-block;padding:4px 12px;border-radius:999px;
  border:1px solid rgba(255,255,255,.22);
  font-size:12px;color:rgba(255,255,255,.75);
}
.footer__col h3{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;letter-spacing:.02em}
.footer__col ul{display:flex;flex-direction:column;gap:10px}
.footer__col a,.footer__col span{font-size:13px;color:rgba(255,255,255,.68);display:inline-block}
.footer__col a:hover{color:var(--accent);text-decoration:underline}
.footer__bottom{
  margin-top:44px;padding:18px 0;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12px;color:rgba(255,255,255,.55);
}
.to-top{color:rgba(255,255,255,.75);font-size:12px}
.to-top:hover{color:var(--accent);text-decoration:underline}

/* 响应式 */
@media (min-width:640px){
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .page-head h1{font-size:32px}
}
@media (min-width:1024px){
  .container{padding:0 24px}
  .split{grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:40px;align-items:start}
  .form-col{position:sticky;top:96px}
  .page-head h1{font-size:44px}
  .page-head .lead{font-size:16px}
  .section{padding:64px 0 0}
  .card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .cta-band__inner{padding:44px}
}
@media (max-width:1023px){
  .nav{
    position:fixed;top:0;right:0;height:100vh;width:min(360px,86vw);
    background:var(--surface);
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:0;padding:88px 24px 32px;
    transform:translateX(105%);
    transition:transform 280ms ease;
    box-shadow:var(--sh-lg);
    z-index:80;overflow-y:auto;
  }
  .nav.is-open{transform:translateX(0)}
  .nav__link{padding:15px 0;font-size:16px;border-bottom:1px solid var(--line);border-radius:0}
  .nav__link::after{display:none}
  .nav__link:hover{background:transparent}
  .nav .header__cta{display:block;margin-top:24px}
  .nav .header__cta .btn{width:100%}
  .header__cta--desktop{display:none}
  .nav-toggle{display:block}
  .header__inner{height:60px;gap:12px}
  .logo__mark{width:32px;height:32px;flex:0 0 32px;font-size:16px;border-radius:9px}
  .logo__text strong{font-size:15px}
  .logo__text em{font-size:10px}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .topbar__info{display:none}
  .topbar__inner{justify-content:flex-end}
  .cta-band__inner{padding:28px 22px;flex-direction:column;align-items:flex-start}
  .cta-band h2{font-size:20px}
  .related__head{flex-direction:column;align-items:flex-start;gap:6px}
}
@media (max-width:639px){
  .container{padding:0 16px}
  .section{padding:44px 0 0}
  .page-head{padding:20px 0 4px}
  .page-head h1{font-size:26px}
  .note-block{padding:20px}
  .form-card{padding:20px}
  .footer__grid{grid-template-columns:1fr;gap:26px}
  .site-footer{padding:40px 0 0}
  .footer__bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .card:hover{transform:none}
}