/* roulang page: index */
:root{
  --brand:#2F7C96;
  --brand-dark:#1F5F78;
  --brand-light:#E6F2F5;
  --accent:#D9824B;
  --accent-light:#FBEDE2;
  --bg:#F6F8F7;
  --panel:#FFFFFF;
  --line:#DCE6E8;
  --ink:#14242B;
  --muted:#5F737C;
  --ok:#2E8B6A;
  --warn:#C4553B;
  --r-card:14px;
  --r-btn:10px;
  --r-img:16px;
  --sh-card:0 10px 24px -18px rgba(20,36,43,.22), 0 1px 2px rgba(20,36,43,.04);
  --sh-hover:0 18px 36px -20px rgba(20,36,43,.28);
  --nav-w:264px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body.site-body{
  margin:0;padding:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font:inherit;cursor:pointer;}
::selection{background:var(--brand-light);color:var(--brand-dark);}

.skip{
  position:absolute;left:-9999px;top:0;z-index:999;
  background:#fff;color:var(--brand-dark);padding:10px 16px;border-radius:0 0 10px 0;font-size:14px;
}
.skip:focus{left:0;}

@media (min-width:1024px){
  body.site-body{padding-left:var(--nav-w);}
}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:1024px){.container{padding-left:32px;padding-right:32px;}}

/* ---------- 品牌标识 ---------- */
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand__mark{
  width:34px;height:34px;flex:none;border-radius:10px;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;letter-spacing:.02em;
}
.brand__name{font-size:16.5px;font-weight:700;letter-spacing:.01em;color:var(--ink);}

/* ---------- 侧边竖向导航 ---------- */
.sidenav{
  position:fixed;top:0;bottom:0;left:0;width:var(--nav-w);
  background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:22px 18px 20px;z-index:80;overflow-y:auto;
  transform:translateX(-100%);transition:transform .28s ease;
}
.sidenav.is-open{transform:translateX(0);}
@media (min-width:1024px){
  .sidenav{transform:none;z-index:40;}
}
.sidenav__brand{
  display:flex;align-items:center;gap:10px;padding:0 6px 20px;border-bottom:1px solid var(--line);
}
.sidenav__nav{margin-top:18px;display:grid;gap:4px;}
.sidenav__link{
  position:relative;display:block;padding:11px 14px;border-radius:10px;
  font-size:14.5px;font-weight:500;color:var(--muted);
  transition:background .18s ease,color .18s ease;
}
.sidenav__link:hover{background:var(--brand-light);color:var(--brand-dark);}
.sidenav__link.is-active{background:var(--brand-light);color:var(--brand-dark);font-weight:700;}
.sidenav__link.is-active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:3px;background:var(--accent);
}
.sidenav__link:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,124,150,.25);}
.sidenav__foot{
  margin-top:auto;padding-top:20px;border-top:1px solid var(--line);display:grid;gap:12px;
}
.sidenav__tip{font-size:12.5px;color:var(--muted);line-height:1.6;text-align:center;}

/* ---------- 移动端顶栏 ---------- */
.topbar{
  position:sticky;top:0;z-index:60;height:60px;padding:0 20px;
  display:flex;align-items:center;justify-content:space-between;
  background:#fff;border-bottom:1px solid var(--line);
}
@media (min-width:1024px){.topbar{display:none;}}
.burger{
  width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:border-color .18s ease,background .18s ease;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);}
.burger:hover{border-color:var(--brand);background:var(--brand-light);}
.burger:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,124,150,.25);}

.scrim{
  position:fixed;inset:0;background:rgba(20,36,43,.5);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:75;
}
.scrim.is-show{opacity:1;visibility:visible;}
@media (min-width:1024px){.scrim{display:none;}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,124,150,.28);}
.btn--primary{background:var(--brand);color:#fff;box-shadow:0 10px 20px -14px rgba(47,124,150,.9);}
.btn--primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 16px 26px -16px rgba(47,124,150,.95);}
.btn--primary:active{transform:translateY(0);}
.btn--ghost{background:#fff;color:var(--brand-dark);border-color:var(--line);}
.btn--ghost:hover{border-color:var(--brand);background:var(--brand-light);transform:translateY(-2px);}
.btn--ghost:active{transform:translateY(0);}
.btn--accent{background:var(--accent);color:#fff;box-shadow:0 10px 20px -14px rgba(217,130,75,.9);}
.btn--accent:hover{background:#c2723f;transform:translateY(-2px);box-shadow:0 16px 26px -16px rgba(217,130,75,.95);}
.btn--block{width:100%;}

/* ---------- 标签 / 徽章 ---------- */
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:999px;background:var(--brand-light);color:var(--brand-dark);
  font-size:13px;font-weight:600;line-height:1.6;
}
.pill::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none;}
.tag{
  display:inline-flex;align-items:center;padding:3px 11px;border-radius:999px;
  background:var(--brand-light);color:var(--brand-dark);font-size:12.5px;font-weight:600;line-height:1.6;
}
.tag--accent{background:var(--accent-light);color:#A75F30;}

/* ---------- 卡片 ---------- */
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.card:hover{box-shadow:var(--sh-hover);transform:translateY(-3px);border-color:#c6d8dd;}

/* ---------- Hero ---------- */
.hero{padding:36px 0 48px;}
@media (min-width:1024px){.hero{padding:64px 0 88px;}}
.hero__grid{display:grid;gap:28px;}
@media (min-width:1024px){
  .hero__grid{grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
}
.hero__title{
  margin-top:18px;font-size:30px;line-height:1.25;font-weight:700;letter-spacing:-.4px;color:var(--ink);
}
@media (min-width:768px){.hero__title{font-size:38px;}}
@media (min-width:1024px){.hero__title{font-size:44px;line-height:1.2;}}
.hero__lead{
  margin-top:18px;font-size:16px;line-height:1.85;color:var(--muted);max-width:34em;
}
.hero__actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px;}
.hero__facts{
  margin-top:34px;padding-top:22px;border-top:1px solid var(--line);
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;
}
.hero__facts li{display:flex;flex-direction:column;gap:2px;}
.hero__facts strong{font-size:18px;font-weight:700;color:var(--brand-dark);}
.hero__facts span{font-size:13px;color:var(--muted);line-height:1.5;}
.hero__media{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh-card);background:var(--brand-light);aspect-ratio:16/10;
}
.hero__media img{width:100%;height:100%;object-fit:cover;}

/* ---------- 板块 ---------- */
.section{padding:48px 0;}
@media (min-width:1024px){.section{padding:80px 0;}}
.section--alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section__head{max-width:44em;margin-bottom:32px;}
@media (min-width:1024px){.section__head{margin-bottom:44px;}}
.section__head--row{
  max-width:none;display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;justify-content:space-between;
}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.08em;color:var(--accent);
}
.section__title{margin-top:10px;font-size:24px;line-height:1.35;font-weight:700;color:var(--ink);}
@media (min-width:1024px){.section__title{font-size:30px;}}
.section__desc{margin-top:12px;font-size:15.5px;line-height:1.8;color:var(--muted);}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand);
  transition:color .18s ease;
}
.link-more::after{content:"→";transition:transform .2s ease;}
.link-more:hover{color:var(--brand-dark);}
.link-more:hover::after{transform:translateX(3px);}

/* ---------- 三步上手 ---------- */
.steps{display:grid;gap:24px;}
@media (min-width:900px){.steps{grid-template-columns:repeat(3,1fr);gap:28px;}}
.step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 24px 26px;box-shadow:var(--sh-card);
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.step:hover{box-shadow:var(--sh-hover);transform:translateY(-3px);border-color:#c6d8dd;}
@media (min-width:900px){
  .step:not(:last-child)::after{
    content:"";position:absolute;top:46px;right:-28px;width:28px;
    border-top:2px dashed #c8dade;
  }
}
.step__num{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;
  background:var(--accent-light);color:var(--accent);font-weight:700;font-size:18px;
}
.step__title{margin-top:16px;font-size:19px;font-weight:700;color:var(--ink);line-height:1.45;}
.step__text{margin-top:10px;font-size:14.5px;line-height:1.85;color:var(--muted);}

/* ---------- 案例证明 ---------- */
.proof{display:grid;gap:20px;}
@media (min-width:1024px){
  .proof{grid-template-columns:7fr 5fr;gap:24px;align-items:start;}
  .proof__side{display:grid;gap:24px;}
}
.proof__main{overflow:hidden;display:flex;flex-direction:column;}
.proof__main img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.proof__body{padding:22px 24px 26px;display:flex;flex-direction:column;align-items:flex-start;}
.proof__body h3{margin-top:14px;font-size:21px;font-weight:700;line-height:1.4;color:var(--ink);}
.proof__body p{margin-top:10px;font-size:14.5px;line-height:1.85;color:var(--muted);}
.stat{
  margin-top:20px;padding-top:16px;border-top:1px dashed var(--line);
  display:flex;align-items:baseline;gap:10px;width:100%;
}
.stat strong{font-size:26px;font-weight:700;color:var(--brand);}
.stat span{font-size:13.5px;color:var(--muted);}
.proof__side .card{padding:22px 22px 24px;display:flex;flex-direction:column;align-items:flex-start;}
.proof__side h3{margin-top:12px;font-size:17px;font-weight:700;line-height:1.5;color:var(--ink);}
.proof__side p{margin-top:8px;font-size:14px;line-height:1.8;color:var(--muted);}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;gap:20px;}
@media (min-width:768px){.news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
.news-card{
  display:flex;flex-direction:column;align-items:flex-start;gap:12px;padding:22px 22px 20px;
}
.news-card .tag{align-self:flex-start;}
.news-card__title{
  font-size:18px;font-weight:700;line-height:1.5;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__text{
  font-size:14.5px;line-height:1.8;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--muted);
}
.news-card__more{color:var(--brand);font-weight:600;}
.empty{
  grid-column:1/-1;background:#fff;border:1px dashed var(--line);border-radius:var(--r-card);
  padding:46px 24px;text-align:center;
}
.empty__icon{
  width:44px;height:44px;margin:0 auto 14px;border-radius:50%;background:var(--brand-light);
  color:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;
}
.empty__text{margin-bottom:16px;font-size:15px;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;}
@media (min-width:1024px){
  .faq-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 20px;align-items:start;}
}
.faq{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  transition:background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.faq:hover{border-color:#c6d8dd;}
.faq[open]{background:var(--brand-light);border-color:#b8d5dd;box-shadow:var(--sh-card);}
.faq__q{
  list-style:none;cursor:pointer;padding:18px 20px;font-size:16.5px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq__q::-webkit-details-marker{display:none;}
.faq__q::after{
  content:"";flex:none;width:10px;height:10px;margin-top:-4px;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(45deg);transition:transform .22s ease;
}
.faq[open] .faq__q::after{transform:rotate(-135deg);margin-top:4px;}
.faq__q:focus-visible{outline:none;box-shadow:inset 0 0 0 3px rgba(47,124,150,.22);}
.faq__a{padding:0 20px 20px;font-size:14.5px;line-height:1.85;color:var(--muted);}

/* ---------- CTA 与表单 ---------- */
.cta{
  background:var(--brand-light);border:1px solid #cfe4e9;border-radius:20px;
  padding:28px 22px;display:grid;gap:28px;box-shadow:var(--sh-card);
}
@media (min-width:1024px){
  .cta{grid-template-columns:1fr 1.05fr;gap:48px;padding:52px 48px;align-items:start;}
}
.cta__title{margin-top:14px;font-size:24px;font-weight:700;line-height:1.35;color:var(--brand-dark);}
@media (min-width:1024px){.cta__title{font-size:30px;}}
.cta__text{margin-top:12px;font-size:15px;line-height:1.85;color:var(--brand-dark);}
.cta__list{margin-top:22px;display:grid;gap:10px;}
.cta__list li{position:relative;padding-left:22px;font-size:14.5px;line-height:1.75;color:var(--brand-dark);}
.cta__list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;background:var(--accent);
}
.form{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-card);display:grid;gap:16px;
}
@media (min-width:768px){.form{padding:26px;}}
.field{display:flex;flex-direction:column;gap:7px;}
.field label{font-size:13.5px;font-weight:600;color:var(--ink);}
.field input,.field select,.field textarea{
  width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;font:inherit;font-size:14.5px;color:var(--ink);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{min-height:96px;resize:vertical;}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#5F737C 50%),linear-gradient(135deg,#5F737C 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat;}
.field input::placeholder,.field textarea::placeholder{color:#9db0b6;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,124,150,.16);
}
.form__row{display:grid;gap:16px;}
@media (min-width:640px){.form__row{grid-template-columns:1fr 1fr;}}
.form__note{font-size:12.5px;line-height:1.7;color:var(--muted);}
.form__ok{
  display:none;background:#EAF6F1;border:1px solid #b8e0cf;color:var(--ok);
  border-radius:var(--r-btn);padding:12px 14px;font-size:14px;line-height:1.7;
}
.form__ok.is-show{display:block;}

/* ---------- 页脚 ---------- */
.footer{background:#fff;border-top:1px solid var(--line);margin-top:24px;}
@media (min-width:1024px){.footer{margin-top:40px;}}
.footer__grid{display:grid;gap:32px;padding:48px 0 36px;}
@media (min-width:768px){.footer__grid{grid-template-columns:2fr 1fr 1fr 1.2fr;gap:28px;}}
.footer__col h3{font-size:14px;font-weight:700;color:var(--ink);letter-spacing:.02em;}
.footer__col ul{margin-top:14px;display:grid;gap:10px;}
.footer__col li,.footer__col a{font-size:14px;line-height:1.75;color:var(--muted);}
.footer__col a{transition:color .18s ease;}
.footer__col a:hover{color:var(--brand);}
.footer__brand p{margin-top:14px;font-size:14px;line-height:1.85;color:var(--muted);max-width:26em;}
.footer__bar{
  border-top:1px solid var(--line);padding:18px 0 26px;
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--muted);
}
.to-top{color:var(--brand);font-weight:600;transition:color .18s ease;}
.to-top:hover{color:var(--brand-dark);}

/* roulang page: article */
:root{
  --brand:#2F7C96;
  --brand-dark:#1F5F78;
  --brand-light:#E6F2F5;
  --accent:#D9824B;
  --accent-light:#FBEDE2;
  --bg:#F6F8F7;
  --panel:#FFFFFF;
  --line:#DCE6E8;
  --ink:#14242B;
  --muted:#5F737C;
  --ok:#2E8B6A;
  --warn:#C4553B;
  --r-card:14px;
  --r-btn:10px;
  --r-img:16px;
  --shadow-card:0 10px 24px -18px rgba(20,36,43,.22),0 1px 2px rgba(20,36,43,.04);
  --shadow-hover:0 18px 36px -20px rgba(20,36,43,.28);
  --nav-w:264px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:.2px}
p{margin:0}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.num{font-variant-numeric:tabular-nums}
::selection{background:var(--accent-light);color:var(--ink)}

/* ---------- 侧栏 ---------- */
.sidenav{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  background:var(--panel);
  border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:26px 20px 22px;
  z-index:60;
  transform:translateX(-100%);
  transition:transform .28s ease;
  overflow-y:auto;
}
.sidenav.is-open{transform:translateX(0)}
.brand{display:flex;align-items:center;gap:10px}
.brand__mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  background:linear-gradient(145deg,var(--brand),var(--brand-dark));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:19px;letter-spacing:.5px;
}
.brand__name{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:.3px}
.brand__sub{font-size:12px;color:var(--muted);margin-top:12px;line-height:1.7}
.nav-group{margin-top:28px}
.nav-group__title{
  font-size:12px;letter-spacing:1.4px;color:var(--muted);
  text-transform:uppercase;padding:0 12px 10px;
}
.nav-item{
  display:flex;align-items:center;gap:10px;
  padding:11px 12px;border-radius:var(--r-btn);
  color:#2A3B43;font-size:15px;font-weight:500;
  border-left:3px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.nav-item:hover{background:#F1F6F7;color:var(--brand-dark)}
.nav-item.is-active{
  background:var(--brand-light);
  color:var(--brand-dark);
  border-left-color:var(--accent);
  font-weight:600;
}
.nav-item__dot{width:6px;height:6px;border-radius:50%;background:var(--line);flex:0 0 6px}
.nav-item.is-active .nav-item__dot{background:var(--accent)}
.sidenav__foot{margin-top:auto;padding-top:24px}
.sidenav__contact{
  font-size:13px;color:var(--muted);line-height:1.75;
  border-top:1px solid var(--line);padding-top:16px;margin-top:16px;
}

/* ---------- 顶栏（移动端） ---------- */
.topbar{
  position:sticky;top:0;z-index:70;
  display:flex;align-items:center;justify-content:space-between;
  height:62px;padding:0 20px;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
}
.burger{
  width:42px;height:42px;border:1px solid var(--line);border-radius:10px;
  background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  cursor:pointer;transition:border-color .18s ease,background .18s ease;
}
.burger:hover{border-color:var(--brand);background:var(--brand-light)}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,36,43,.45);z-index:55;display:none;
}
.drawer-mask.is-open{display:block}

/* ---------- 主区 ---------- */
.main-col{width:100%}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease,color .16s ease,border-color .16s ease;
}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,124,150,.28)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-card)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-primary:active{transform:translateY(0)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#C4713D;transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--brand-dark);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);background:var(--brand-light);transform:translateY(-2px)}
.btn-block{width:100%}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.3px;
  background:var(--accent-light);color:#9A5527;
}
.tag--brand{background:var(--brand-light);color:var(--brand-dark)}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#C9DCE2}

/* ---------- 文章页 ---------- */
.article-banner{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  background:#E9F1F3 url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  min-height:190px;display:flex;align-items:flex-end;
  border:1px solid var(--line);
}
.article-banner__veil{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(31,95,120,.86),rgba(31,95,120,.42) 62%,rgba(31,95,120,.12));
}
.article-banner__inner{position:relative;padding:26px 28px;color:#fff;max-width:640px}
.article-banner__inner h2{font-size:22px;color:#fff}
.article-banner__inner p{font-size:14px;color:rgba(255,255,255,.88);margin-top:8px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.breadcrumb a:hover{color:var(--brand-dark)}
.breadcrumb__sep{color:#B7C7CD}
.article-head{max-width:820px}
.article-head h1{font-size:34px;line-height:1.28;margin:14px 0 16px;color:var(--ink)}
.article-meta{display:flex;flex-wrap:wrap;gap:10px 20px;font-size:13px;color:var(--muted)}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-lead{
  font-size:16px;line-height:1.85;color:#384C55;
  background:var(--brand-light);border-left:3px solid var(--brand);
  border-radius:0 var(--r-card) var(--r-card) 0;
  padding:16px 20px;margin-top:22px;
}
.article-cover{margin-top:26px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);background:#EDF3F4}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:32px}
.reading-progress{
  position:fixed;top:0;left:0;height:3px;width:0;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  z-index:90;transition:width .1s linear;
}
.article-body{
  max-width:800px;font-size:16px;line-height:1.9;color:#22343C;
}
.article-body>*:first-child{margin-top:0}
.article-body h2{
  position:relative;font-size:26px;font-weight:700;
  margin:44px 0 16px;padding-left:14px;color:var(--ink);scroll-margin-top:80px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:3px;border-radius:3px;background:var(--brand);
}
.article-body h3{font-size:20px;margin:32px 0 12px;color:var(--ink)}
.article-body h4{font-size:17px;margin:24px 0 10px;color:#2A3B43}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 18px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:6px 0}
.article-body blockquote{
  margin:0 0 20px;padding:16px 20px;background:var(--brand-light);
  border-left:3px solid var(--brand);border-radius:0 12px 12px 0;color:#2C4049;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:14px;border:1px solid var(--line);margin:6px 0}
.article-body figure{margin:22px 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:0 0 22px;overflow:hidden;border-radius:10px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body thead th{background:var(--brand-light);color:var(--brand-dark);font-weight:600}
.article-body tbody tr:nth-child(even){background:#FAFCFC}
.article-body a{color:var(--brand-dark);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--accent)}
.article-body code{background:#EDF3F4;border-radius:6px;padding:2px 6px;font-size:14px}
.article-body hr{border:none;border-top:1px solid var(--line);margin:34px 0}
.side-card{position:sticky;top:88px}
.side-card__list li{display:flex;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14px;color:#33474F}
.side-card__list li:last-child{border-bottom:none}
.side-card__list i{color:var(--accent);font-style:normal;font-weight:700}
.empty-state{
  border:1px dashed #C4D6DC;border-radius:var(--r-card);background:#FBFDFD;
  padding:44px 24px;text-align:center;
}
.empty-state__icon{
  width:52px;height:52px;border-radius:14px;background:var(--brand-light);color:var(--brand-dark);
  display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:22px;font-weight:700;
}
.section{padding:72px 0}
.section--tight{padding:52px 0}
.section__head{max-width:720px;margin-bottom:34px}
.section__head h2{font-size:28px;margin-bottom:12px}
.section__head p{color:var(--muted);font-size:15px}
.reco-card{overflow:hidden;display:flex;flex-direction:column}
.reco-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#EDF3F4}
.reco-card__body{padding:20px 22px 22px}
.reco-card__body h3{font-size:18px;margin-bottom:8px}
.reco-card__body p{font-size:14px;color:var(--muted);line-height:1.7}
.cta-panel{
  background:var(--brand-light);border:1px solid #CFE3E8;border-radius:var(--r-img);
  padding:38px 34px;display:grid;grid-template-columns:1fr;gap:26px;align-items:center;
}
.cta-panel h2{font-size:26px;margin-bottom:10px}
.cta-panel p{color:#3E545D;font-size:15px}
.footer{background:#fff;border-top:1px solid var(--line);margin-top:24px}
.footer__grid{
  display:grid;grid-template-columns:1fr;gap:30px;padding:56px 0 34px;
}
.footer__brand p{font-size:14px;color:var(--muted);margin-top:14px;max-width:320px;line-height:1.8}
.footer__col h3{font-size:14px;color:var(--ink);margin-bottom:14px;letter-spacing:.4px}
.footer__col ul li{font-size:14px;color:var(--muted);padding:5px 0}
.footer__col ul li a:hover{color:var(--brand-dark)}
.footer__bar{
  border-top:1px solid var(--line);padding:18px 0 26px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--muted);
}
.to-top{color:var(--brand-dark);font-weight:600}
.to-top:hover{color:var(--accent)}

@media (min-width:768px){
  .article-head h1{font-size:40px}
  .footer__grid{grid-template-columns:1.5fr 1fr 1fr 1fr}
  .cta-panel{grid-template-columns:1.4fr 1fr;padding:44px 42px}
  .section{padding:88px 0}
}
@media (min-width:1024px){
  .sidenav{transform:none;box-shadow:none}
  .topbar{display:none}
  .drawer-mask{display:none!important}
  .main-col{margin-left:var(--nav-w)}
  .container{padding:0 40px}
  .article-grid{grid-template-columns:minmax(0,800px) minmax(0,260px);gap:56px}
}
@media (max-width:639px){
  .container{padding:0 20px}
  .article-head h1{font-size:28px}
  .section{padding:52px 0}
  .article-banner__inner{padding:20px}
  .cta-panel{padding:26px 20px}
}

/* roulang page: category1 */
:root{
  --primary:#2F7C96;
  --primary-dark:#1F5F78;
  --primary-light:#E6F2F5;
  --accent:#D9824B;
  --accent-light:#FBEDE2;
  --bg:#F6F8F7;
  --card:#FFFFFF;
  --line:#DCE6E8;
  --ink:#14242B;
  --muted:#5F737C;
  --ok:#2E8B6A;
  --warn:#C4553B;
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-card:0 10px 24px -18px rgba(20,36,43,.22), 0 1px 2px rgba(20,36,43,.04);
  --shadow-hover:0 18px 36px -20px rgba(20,36,43,.28);
  --nav-w:272px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body.site{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
@media (max-width:640px){.container{padding:0 20px}}

/* ============ 顶部栏（移动端） ============ */
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  height:62px;padding:0 20px;
  background:#fff;border-bottom:1px solid var(--line);
}
@media (min-width:1024px){.topbar{display:none}}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand__mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(140deg,var(--primary),var(--primary-dark));
  color:#fff;display:grid;place-items:center;font-size:16px;font-weight:700;
  letter-spacing:.5px;font-variant-numeric:tabular-nums;
}
.brand__name{font-size:17px;letter-spacing:.3px}
.burger{
  width:42px;height:38px;border-radius:10px;border:1px solid var(--line);background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;
  transition:background .18s,border-color .18s;
}
.burger:hover{background:var(--primary-light);border-color:#BEDDE6}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--primary-dark)}

/* ============ 左侧竖向导航 ============ */
.sidenav{
  position:fixed;top:0;bottom:0;left:0;width:var(--nav-w);z-index:70;
  background:#fff;border-right:1px solid var(--line);
  padding:24px 20px;display:flex;flex-direction:column;gap:22px;
  overflow-y:auto;transform:translateX(-100%);
  transition:transform .28s cubic-bezier(.4,0,.2,1);
}
@media (min-width:1024px){.sidenav{transform:none}}
.sidenav.is-open{transform:translateX(0)}
.snav{display:flex;flex-direction:column;gap:6px}
.snav__title{font-size:12px;letter-spacing:.12em;color:var(--muted);padding:0 12px 6px}
.snav__link{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:11px 12px;border-radius:10px;font-size:15px;color:var(--muted);
  transition:background .18s,color .18s;
}
.snav__link:hover{background:var(--primary-light);color:var(--primary-dark)}
.snav__link.is-active{background:var(--primary-light);color:var(--primary-dark);font-weight:600}
.snav__link.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:2px;background:var(--accent);
}
.snav__arrow{font-size:13px;color:#9DB3BB}
.side-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px;padding-top:16px;border-top:1px solid var(--line)}
.side-foot p{font-size:13px;color:var(--muted);line-height:1.6}
.side-foot strong{color:var(--ink);font-weight:600}
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,36,43,.45);z-index:65;
  opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
@media (min-width:1024px){.drawer-mask{display:none}}

/* ============ 内容区 ============ */
.content-wrap{}
@media (min-width:1024px){.content-wrap{margin-left:var(--nav-w)}}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .18s,box-shadow .18s,background .18s,color .18s,border-color .18s;
}
.btn--primary{background:var(--primary);color:#fff;box-shadow:0 12px 22px -16px rgba(31,95,120,.95)}
.btn--primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 16px 26px -16px rgba(31,95,120,.95)}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost{background:#fff;border-color:var(--line);color:var(--primary-dark)}
.btn--ghost:hover{border-color:var(--primary);background:var(--primary-light)}
.btn--accent{background:var(--accent);color:#fff}
.btn--accent:hover{background:#C9713C;transform:translateY(-1px)}
.btn--block{width:100%}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none}

/* ============ 通用 ============ */
.eyebrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;letter-spacing:.04em;
  color:var(--primary-dark);background:var(--primary-light);
  border:1px solid #CBE3EA;border-radius:999px;padding:4px 12px;
}
.eyebrow--accent{color:#A85E2F;background:var(--accent-light);border-color:#F2D6BE}
.t-hero{font-size:clamp(30px,4.4vw,46px);line-height:1.22;font-weight:700;letter-spacing:-.01em}
.t-sec{font-size:clamp(24px,3vw,31px);line-height:1.3;font-weight:700}
.t-sub{font-size:20px;line-height:1.4;font-weight:600}
.lead{font-size:16.5px;color:var(--muted);line-height:1.8}
.sec{padding:78px 0}
.sec--tight{padding:56px 0}
.sec--tint{background:var(--primary-light)}
@media (max-width:767px){.sec{padding:52px 0}.sec--tight{padding:40px 0}}
.sec-head{max-width:760px;margin-bottom:36px}
.sec-head .t-sec{margin:12px 0 12px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);transition:box-shadow .22s,transform .22s,border-color .22s;
}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:#CBE3EA}
.tag{
  display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;
  padding:4px 11px;border-radius:999px;background:var(--accent-light);color:#A85E2F;
  border:1px solid #F2D6BE;
}
.tag--blue{background:var(--primary-light);color:var(--primary-dark);border-color:#CBE3EA}
.divider{height:1px;background:var(--line);border:0}

/* ============ Hero ============ */
.hero{padding:60px 0 50px;position:relative;overflow:hidden}
.hero__grid{display:grid;gap:44px;align-items:center}
@media (min-width:1024px){.hero__grid{grid-template-columns:7fr 5fr;gap:56px}}
.hero__title{margin:18px 0 16px}
.hero__title .accent-line{
  display:block;width:64px;height:4px;border-radius:3px;background:var(--accent);margin-top:18px;
}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 22px}
.trust{display:flex;flex-wrap:wrap;gap:10px 22px;padding-top:20px;border-top:1px dashed var(--line)}
.trust span{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--muted)}
.trust span::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--ok)}
.hero__media{position:relative}
.hero__media .figure{aspect-ratio:16/11}
.hero__badge{
  position:absolute;left:-10px;bottom:18px;background:#fff;border:1px solid var(--line);
  border-radius:12px;box-shadow:var(--shadow-card);padding:12px 16px;
}
.hero__badge b{display:block;font-size:22px;color:var(--primary-dark);font-variant-numeric:tabular-nums}
.hero__badge span{font-size:12.5px;color:var(--muted)}
@media (max-width:640px){.hero__badge{left:8px;bottom:10px;padding:10px 13px}}

.figure{
  border-radius:16px;overflow:hidden;border:1px solid var(--line);background:#EDF3F4;
  box-shadow:var(--shadow-card);
}
.figure img{width:100%;height:100%;object-fit:cover}
.placeholder{
  width:100%;height:100%;display:grid;place-items:center;color:#9DB3BB;font-size:13px;
  background:repeating-linear-gradient(135deg,#EFF5F6,#EFF5F6 12px,#E6EFF1 12px,#E6EFF1 24px);
}

/* ============ 锚点导航 ============ */
.anchors{
  display:flex;flex-wrap:wrap;gap:10px;padding:16px;border-radius:var(--radius-card);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.anchors a{
  font-size:14px;color:var(--muted);padding:7px 14px;border-radius:999px;border:1px solid var(--line);
  transition:all .18s;
}
.anchors a:hover{color:var(--primary-dark);background:var(--primary-light);border-color:#CBE3EA}
.anchors a.is-current{color:#fff;background:var(--primary);border-color:var(--primary)}

/* ============ 图文交替 ============ */
.split{display:grid;gap:38px;align-items:center}
@media (min-width:1024px){.split{grid-template-columns:1fr 1fr;gap:56px}}
.split--reverse .split__media{order:2}
@media (max-width:1023px){.split--reverse .split__media{order:0}}
.split__media .figure{aspect-ratio:4/3}
.split__body h2{margin:14px 0 14px}
.split__body p{color:var(--muted);line-height:1.85}

.check-list{margin-top:20px;display:flex;flex-direction:column;gap:12px}
.check-list li{
  position:relative;padding-left:30px;font-size:15px;color:var(--ink);line-height:1.7;
}
.check-list li::before{
  content:"";position:absolute;left:0;top:8px;width:16px;height:16px;border-radius:50%;
  background:var(--primary-light);border:1px solid #BEDDE6;
}
.check-list li::after{
  content:"";position:absolute;left:5px;top:12px;width:5px;height:8px;
  border-right:2px solid var(--primary-dark);border-bottom:2px solid var(--primary-dark);
  transform:rotate(40deg);
}
.check-list li b{font-weight:600}

/* ============ 步骤时间线 ============ */
.timeline{display:grid;gap:26px}
@media (min-width:768px){.timeline{grid-template-columns:repeat(5,1fr);gap:18px}}
.step{position:relative;padding-right:6px}
.step__num{
  width:42px;height:42px;border-radius:999px;display:grid;place-items:center;
  background:var(--accent-light);border:1px solid #F2D6BE;color:#A85E2F;
  font-weight:700;font-variant-numeric:tabular-nums;margin-bottom:14px;
}
.step h3{font-size:18px;font-weight:600;margin-bottom:8px}
.step p{font-size:14.5px;color:var(--muted);line-height:1.7}
@media (min-width:768px){
  .step::after{
    content:"";position:absolute;top:21px;left:58px;right:-16px;
    border-top:2px dashed #CFE0E4;
  }
  .step:last-child::after{display:none}
}

/* ============ 表格 ============ */
.tbl-wrap{overflow-x:auto;border-radius:var(--radius-card);border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-card)}
table.tbl{width:100%;border-collapse:collapse;min-width:620px}
table.tbl th,table.tbl td{
  text-align:left;padding:15px 18px;font-size:14.5px;border-bottom:1px solid var(--line);
}
table.tbl thead th{
  background:#F1F6F7;color:var(--primary-dark);font-weight:600;font-size:14px;letter-spacing:.02em;
}
table.tbl tbody tr:nth-child(even){background:#FAFCFC}
table.tbl tbody tr:hover{background:var(--primary-light)}
table.tbl tbody tr:last-child td{border-bottom:0}
.pill-must{color:#A85E2F;font-weight:600}
.pill-opt{color:var(--muted)}
.pill-cond{color:var(--ok);font-weight:600}

/* ============ 信息条 ============ */
.notice{
  display:flex;gap:14px;align-items:flex-start;padding:18px 20px;border-radius:var(--radius-card);
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--primary);
  box-shadow:var(--shadow-card);
}
.notice p{font-size:14.5px;color:var(--muted);line-height:1.75}
.notice strong{color:var(--ink)}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;transition:border-color .2s,background .2s;
}
.faq-item[open]{background:var(--primary-light);border-color:#BEDDE6}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--primary-dark)}
.faq-icon{
  flex:0 0 auto;width:24px;height:24px;border-radius:50%;border:1px solid #BEDDE6;
  background:#fff;position:relative;transition:transform .22s,background .22s;margin-top:2px;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--primary-dark);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:11px;height:2px}
.faq-icon::after{width:2px;height:11px;transition:opacity .2s}
.faq-item[open] .faq-icon{background:var(--accent);border-color:var(--accent);transform:rotate(180deg)}
.faq-item[open] .faq-icon::before,.faq-item[open] .faq-icon::after{background:#fff}
.faq-item[open] .faq-icon::after{opacity:0}
.faq-body{padding:0 20px 20px;font-size:14.5px;color:var(--muted);line-height:1.8}
.faq-body p+p{margin-top:8px}

/* ============ CTA 表单 ============ */
.cta{background:var(--primary-light);border-top:1px solid #D3E7EC;border-bottom:1px solid #D3E7EC}
.cta__grid{display:grid;gap:36px}
@media (min-width:1024px){.cta__grid{grid-template-columns:1fr 1fr;gap:56px;align-items:start}}
.form-card{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-hover);padding:26px}
.form-grid{display:grid;gap:16px}
@media (min-width:640px){.form-grid--two{grid-template-columns:1fr 1fr}}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;padding:11px 14px;border-radius:var(--radius-btn);border:1px solid var(--line);
  background:#FBFDFD;font-size:15px;transition:border-color .18s,box-shadow .18s,background .18s;
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7}
.field input:hover,.field select:hover,.field textarea:hover{border-color:#C3D6DA}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(47,124,150,.16);
}
.form-note{font-size:12.5px;color:var(--muted);line-height:1.7;margin-top:12px}
.alert{
  border-radius:var(--radius-btn);padding:12px 15px;font-size:14px;margin-bottom:16px;
  border:1px solid transparent;
}
.alert--ok{background:#EAF6F1;border-color:#BFE3D5;color:#1F6B51}
.alert--error{background:#FBEDE9;border-color:#F0CFC5;color:#A33F27}
.mini-list{display:flex;flex-direction:column;gap:14px;margin-top:26px}
.mini-list li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--muted);line-height:1.7}
.mini-list b{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;background:#fff;border:1px solid #CBE3EA;
  color:var(--primary-dark);display:grid;place-items:center;font-size:13px;font-variant-numeric:tabular-nums;
}

/* ============ 页脚 ============ */
.footer{background:#fff;border-top:1px solid var(--line);padding:56px 0 0;margin-top:0}
.footer__grid{display:grid;gap:34px}
@media (min-width:768px){.footer__grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}}
.footer__brand p{font-size:14px;color:var(--muted);line-height:1.8;margin-top:14px;max-width:330px}
.footer__col h3{font-size:15px;font-weight:600;margin-bottom:14px}
.footer__col ul{display:flex;flex-direction:column;gap:10px}
.footer__col li{font-size:14px;color:var(--muted)}
.footer__col a{font-size:14px;color:var(--muted);transition:color .18s}
.footer__col a:hover{color:var(--primary-dark)}
.footer__bar{
  margin-top:44px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
}
.footer__bar p{font-size:13.5px;color:var(--muted)}
.to-top{
  font-size:13.5px;color:var(--primary-dark);border:1px solid var(--line);border-radius:999px;
  padding:7px 15px;transition:all .18s;
}
.to-top:hover{background:var(--primary-light);border-color:#CBE3EA}

/* 锚点滚动留白 */
section[id]{scroll-margin-top:78px}
@media (min-width:1024px){section[id]{scroll-margin-top:24px}}

@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --primary:#2F7C96;
  --primary-dark:#1F5F78;
  --primary-light:#E6F2F5;
  --accent:#D9824B;
  --accent-light:#FBEDE2;
  --bg:#F6F8F7;
  --surface:#FFFFFF;
  --line:#DCE6E8;
  --ink:#14242B;
  --muted:#5F737C;
  --success:#2E8B6A;
  --warn:#C4553B;
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-card:0 10px 24px -18px rgba(20,36,43,.22), 0 1px 2px rgba(20,36,43,.04);
  --shadow-hover:0 18px 36px -20px rgba(20,36,43,.28);
  --sidebar-w:264px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:0;list-style:none;}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;height:auto;}
button,input,select,textarea{font:inherit;color:inherit;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 布局骨架 ---------- */
.layout{display:flex;min-height:100vh;}
.page{flex:1;min-width:0;margin-left:var(--sidebar-w);display:flex;flex-direction:column;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}

/* ---------- 品牌 ---------- */
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand__mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(150deg,var(--primary),var(--primary-dark));
  color:#fff;font-weight:700;font-size:16px;
  display:inline-flex;align-items:center;justify-content:center;
  letter-spacing:.5px;
}
.brand__name{font-size:17px;font-weight:700;letter-spacing:.3px;color:var(--ink);}

/* ---------- 左侧竖向导航 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:22px;
  padding:24px 18px 20px;z-index:60;
  transition:transform .28s ease;
}
.sidebar__head{padding:0 6px 18px;border-bottom:1px solid var(--line);}
.sidebar__label{
  font-size:12px;letter-spacing:.16em;color:var(--muted);
  padding:0 8px;margin-bottom:8px;
}
.sidenav__nav{display:flex;flex-direction:column;gap:6px;}
.sidenav__link{
  position:relative;display:flex;align-items:center;
  padding:11px 14px 11px 16px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--muted);
  transition:background .2s,color .2s,transform .2s;
}
.sidenav__link::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:3px;background:var(--accent);
  transition:height .22s ease;
}
.sidenav__link:hover{background:#F1F6F7;color:var(--primary-dark);}
.sidenav__link:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,124,150,.28);}
.sidenav__link.is-active{
  background:var(--primary-light);color:var(--primary-dark);font-weight:600;
}
.sidenav__link.is-active::before{height:22px;}
.sidebar__foot{margin-top:auto;display:flex;flex-direction:column;gap:12px;}
.sidebar__note{
  font-size:13px;color:var(--muted);line-height:1.7;
  background:#F4F7F8;border:1px solid var(--line);
  border-radius:12px;padding:12px 14px;
}
.sidebar__note strong{color:var(--primary-dark);font-weight:600;}

/* ---------- 移动端顶部栏 ---------- */
.topbar{
  position:sticky;top:0;z-index:50;display:none;
  align-items:center;justify-content:space-between;
  height:60px;padding:0 20px;
  background:var(--surface);border-bottom:1px solid var(--line);
}
.burger{
  width:42px;height:42px;border:1px solid var(--line);border-radius:10px;
  background:#fff;display:inline-flex;flex-direction:column;
  align-items:center;justify-content:center;gap:4px;cursor:pointer;
  transition:border-color .2s,background .2s;
}
.burger:hover{border-color:var(--primary);background:var(--primary-light);}
.burger:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,124,150,.28);}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--primary-dark);}
.overlay{
  position:fixed;inset:0;background:rgba(20,36,43,.42);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
  z-index:55;
}
.overlay.is-visible{opacity:1;visibility:visible;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);
  border:1px solid transparent;font-size:15px;font-weight:600;
  cursor:pointer;text-align:center;
  transition:transform .18s,box-shadow .18s,background .18s,color .18s,border-color .18s;
}
.btn--primary{
  background:var(--primary);color:#fff;
  box-shadow:0 10px 20px -14px rgba(31,95,120,.75);
}
.btn--primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 16px 28px -16px rgba(31,95,120,.7);}
.btn--primary:active{transform:translateY(0);box-shadow:0 6px 14px -12px rgba(31,95,120,.7);}
.btn--ghost{background:#fff;border-color:var(--line);color:var(--primary-dark);}
.btn--ghost:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-card);}
.btn--ghost:active{transform:translateY(0);}
.btn--accent{background:var(--accent);color:#fff;box-shadow:0 10px 20px -14px rgba(217,130,75,.8);}
.btn--accent:hover{background:#C0703C;transform:translateY(-2px);}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,124,150,.3);}
.btn--block{width:100%;}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- 通用标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--primary-light);color:var(--primary-dark);
  font-size:13px;font-weight:600;letter-spacing:.02em;
}
.badge--accent{background:var(--accent-light);color:#A75E2C;}
.badge__dot{width:6px;height:6px;border-radius:50%;background:var(--accent);}

/* ---------- 页首 ---------- */
.hero{padding:56px 0 12px;}
.hero__inner{
  display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;
}
.hero__title{
  font-size:44px;line-height:1.2;font-weight:700;letter-spacing:-.4px;
  margin:16px 0 18px;
}
.hero__title em{font-style:normal;color:var(--primary-dark);}
.hero__lead{font-size:17px;color:var(--muted);max-width:40em;}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.hero__meta{
  display:flex;flex-wrap:wrap;gap:12px 28px;
  margin-top:26px;padding-top:20px;border-top:1px dashed var(--line);
  font-size:14px;color:var(--muted);
}
.hero__meta b{color:var(--ink);font-weight:600;}
.hero__figure{
  border-radius:16px;overflow:hidden;background:#E9EFF1;
  border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.hero__figure img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.hero__figure figcaption{
  padding:10px 16px;font-size:13px;color:var(--muted);
  background:#fff;border-top:1px solid var(--line);
}

/* ---------- 锚点导航 ---------- */
.anchors{
  position:sticky;top:0;z-index:30;
  background:rgba(246,248,247,.94);
  border-bottom:1px solid var(--line);
  padding:12px 0;margin:28px 0 0;
}
.anchors__list{
  display:flex;gap:10px;overflow-x:auto;scrollbar-width:none;
}
.anchors__list::-webkit-scrollbar{display:none;}
.anchors__link{
  white-space:nowrap;font-size:14px;font-weight:500;color:var(--muted);
  padding:8px 16px;border-radius:999px;border:1px solid var(--line);
  background:#fff;transition:color .2s,border-color .2s,background .2s,transform .2s;
}
.anchors__link:hover{color:var(--primary-dark);border-color:var(--primary);transform:translateY(-1px);}
.anchors__link:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,124,150,.28);}

/* ---------- 板块 ---------- */
.section{padding:72px 0;}
.section--tight{padding:48px 0;}
.section__head{max-width:52em;margin-bottom:32px;}
.section__eyebrow{
  font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--accent);
  text-transform:uppercase;
}
.section__title{font-size:30px;line-height:1.3;font-weight:700;margin:10px 0 12px;}
.section__desc{color:var(--muted);font-size:16px;}

/* ---------- 双栏：主内容 + 目录卡 ---------- */
.twocol{
  display:grid;grid-template-columns:minmax(0,1fr) 316px;gap:36px;align-items:start;
}
.article-body{display:flex;flex-direction:column;gap:34px;}
.block{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:28px 30px;
  box-shadow:var(--shadow-card);
  transition:box-shadow .22s,border-color .22s;
}
.block:hover{box-shadow:var(--shadow-hover);border-color:#CDDDE1;}
.block__index{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;
  background:var(--accent-light);color:#A75E2C;
  font-size:14px;font-weight:700;margin-bottom:14px;
}
.block h2{
  position:relative;font-size:22px;line-height:1.35;font-weight:700;
  padding-left:14px;margin-bottom:14px;
}
.block h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  border-radius:3px;background:var(--primary);
}
.block p{color:var(--muted);margin-bottom:14px;}
.block p:last-child{margin-bottom:0;}
.point-list{display:flex;flex-direction:column;gap:10px;margin-top:6px;}
.point-list li{
  position:relative;padding-left:22px;font-size:15px;color:var(--ink);line-height:1.7;
}
.point-list li::before{
  content:"";position:absolute;left:2px;top:11px;
  width:7px;height:7px;border-radius:2px;background:var(--primary);
  transform:rotate(45deg);
}
.block__figure{
  margin-top:18px;border-radius:12px;overflow:hidden;
  border:1px solid var(--line);background:#E9EFF1;
}
.block__figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.block__figure figcaption{
  padding:9px 14px;font-size:13px;color:var(--muted);background:#fff;border-top:1px solid var(--line);
}

/* ---------- 右侧目录摘要卡 ---------- */
.side-panel{position:sticky;top:88px;display:flex;flex-direction:column;gap:18px;}
.panel{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:22px 22px 20px;
  box-shadow:var(--shadow-card);
}
.panel__title{
  font-size:15px;font-weight:700;margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
}
.panel__title span{
  width:6px;height:6px;border-radius:50%;background:var(--accent);
}
.panel__toc{display:flex;flex-direction:column;gap:2px;}
.panel__toc a{
  font-size:14px;color:var(--muted);padding:7px 10px;border-radius:8px;
  transition:background .2s,color .2s;
}
.panel__toc a:hover{background:var(--primary-light);color:var(--primary-dark);}
.panel--accent{background:var(--primary-light);border-color:#C9E1E8;}
.panel--accent .panel__title{color:var(--primary-dark);}
.checklist{display:flex;flex-direction:column;gap:9px;}
.checklist li{
  position:relative;padding-left:24px;font-size:14px;color:var(--primary-dark);line-height:1.65;
}
.checklist li::before{
  content:"";position:absolute;left:0;top:4px;width:14px;height:14px;
  border-radius:4px;background:#fff;border:1px solid #B7D6DF;
}
.checklist li::after{
  content:"";position:absolute;left:5px;top:8px;width:5px;height:8px;
  border-right:2px solid var(--accent);border-bottom:2px solid var(--accent);
  transform:rotate(42deg);
}
.panel__meta{
  font-size:13px;color:var(--primary-dark);line-height:1.7;
  border-top:1px dashed #B7D6DF;margin-top:14px;padding-top:12px;
}

/* ---------- 卡片矩阵 ---------- */
.grid-cards{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;
}
.card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:24px;
  box-shadow:var(--shadow-card);
  display:flex;flex-direction:column;gap:12px;
  transition:transform .22s,box-shadow .22s,border-color .22s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#CDDDE1;}
.card__tag{
  align-self:flex-start;font-size:12px;font-weight:600;
  padding:4px 12px;border-radius:999px;
  background:var(--accent-light);color:#A75E2C;
}
.card__title{font-size:18px;font-weight:700;line-height:1.45;}
.card__text{font-size:14px;color:var(--muted);}
.card__foot{
  margin-top:auto;padding-top:12px;border-top:1px dashed var(--line);
  font-size:13px;color:var(--primary-dark);font-weight:600;
}

/* ---------- 对照表 ---------- */
.table-wrap{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);
}
table.compare{width:100%;border-collapse:collapse;font-size:15px;}
table.compare caption{
  text-align:left;padding:20px 24px 6px;font-size:16px;font-weight:700;color:var(--ink);
}
table.compare th,table.compare td{
  text-align:left;padding:14px 24px;border-bottom:1px solid var(--line);vertical-align:top;
}
table.compare thead th{
  background:#F1F6F7;font-size:13px;font-weight:600;color:var(--primary-dark);
  letter-spacing:.02em;
}
table.compare tbody tr:nth-child(even){background:#FAFCFC;}
table.compare tbody tr:last-child td{border-bottom:none;}
table.compare td:first-child{font-weight:600;color:var(--ink);width:26%;}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:12px;}
.faq__item{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;
  transition:background .2s,border-color .2s,box-shadow .2s;
}
.faq__item:hover{box-shadow:var(--shadow-card);}
.faq__item[open]{background:var(--primary-light);border-color:#BFDCE4;}
.faq__q{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:18px;padding:18px 22px;font-size:17px;font-weight:600;color:var(--ink);
}
.faq__q::-webkit-details-marker{display:none;}
.faq__q::after{
  content:"+";flex:none;color:var(--accent);font-size:20px;font-weight:700;line-height:1;
}
.faq__item[open] .faq__q::after{content:"–";}
.faq__q:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,124,150,.28) inset;}
.faq__a{
  padding:0 22px 20px;font-size:15px;color:var(--muted);line-height:1.75;
}

/* ---------- CTA / 表单 ---------- */
.cta{
  background:var(--primary-light);
  border-top:1px solid #CFE4EA;border-bottom:1px solid #CFE4EA;
  padding:72px 0;
}
.cta__inner{display:grid;grid-template-columns:5fr 6fr;gap:44px;align-items:start;}
.cta__title{font-size:30px;line-height:1.3;font-weight:700;margin:14px 0 14px;}
.cta__desc{color:var(--primary-dark);font-size:16px;max-width:34em;}
.cta__list{display:flex;flex-direction:column;gap:10px;margin-top:22px;}
.cta__list li{
  position:relative;padding-left:22px;font-size:15px;color:var(--primary-dark);
}
.cta__list li::before{
  content:"";position:absolute;left:2px;top:11px;width:7px;height:7px;
  border-radius:50%;background:var(--accent);
}
.form{
  background:var(--surface);border:1px solid var(--line);
  border-radius:16px;padding:28px;box-shadow:var(--shadow-card);
}
.form__grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:7px;}
.field--full{grid-column:1 / -1;}
.field label{font-size:14px;font-weight:600;color:var(--ink);}
.field input,.field select,.field textarea{
  width:100%;padding:11px 14px;border:1px solid var(--line);
  border-radius:10px;background:#fff;font-size:15px;
  transition:border-color .2s,box-shadow .2s;
}
.field textarea{resize:vertical;min-height:112px;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,124,150,.16);
}
.field input:invalid:not(:placeholder-shown){border-color:var(--warn);}
.form__hint{font-size:13px;color:var(--muted);line-height:1.65;}
.form__actions{margin-top:20px;display:flex;flex-wrap:wrap;align-items:center;gap:14px;}
.form__privacy{font-size:13px;color:var(--muted);}

/* ---------- 页脚 ---------- */
.footer{
  margin-top:auto;background:var(--surface);
  border-top:1px solid var(--line);padding:56px 0 0;
}
.footer__grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;
  padding-bottom:36px;
}
.footer__brand p{font-size:14px;color:var(--muted);margin-top:14px;max-width:30em;}
.footer__col h3{font-size:15px;font-weight:700;margin-bottom:14px;}
.footer__col ul{display:flex;flex-direction:column;gap:10px;}
.footer__col li{font-size:14px;color:var(--muted);}
.footer__col a{
  color:var(--muted);transition:color .2s,padding-left .2s;
}
.footer__col a:hover{color:var(--primary-dark);padding-left:4px;}
.footer__bar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0 22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.to-top{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;border:1px solid var(--line);border-radius:999px;
  transition:border-color .2s,color .2s,background .2s;
}
.to-top:hover{border-color:var(--primary);color:var(--primary-dark);background:var(--primary-light);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .grid-cards{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:1023px){
  .sidebar{transform:translateX(-100%);box-shadow:0 24px 48px -24px rgba(20,36,43,.4);width:280px;}
  .sidebar.is-open{transform:translateX(0);}
  .page{margin-left:0;}
  .topbar{display:flex;}
  .hero{padding:36px 0 8px;}
  .hero__inner{grid-template-columns:1fr;gap:28px;}
  .hero__title{font-size:34px;}
  .twocol{grid-template-columns:1fr;gap:28px;}
  .side-panel{position:static;}
  .cta__inner{grid-template-columns:1fr;gap:30px;}
  .footer__grid{grid-template-columns:1fr 1fr;}
  .section{padding:56px 0;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .hero__title{font-size:30px;}
  .section__title{font-size:24px;}
  .cta__title{font-size:24px;}
  .block{padding:22px 20px;}
  .grid-cards{grid-template-columns:1fr;}
  .form{padding:22px 20px;}
  .form__grid{grid-template-columns:1fr;}
  table.compare th,table.compare td{padding:12px 16px;}
  table.compare td:first-child{width:auto;}
  .footer__bar{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .hero__title{font-size:27px;}
  .btn{width:100%;}
  .hero__actions{flex-direction:column;}
  .footer__grid{grid-template-columns:1fr;}
}