/* roulang page: index */
:root{
  --c700:#17347C; --c600:#1E46A8; --c500:#2C67D8; --c300:#7FA4E8; --c100:#DCE7FB; --c050:#EEF4FE;
  --o600:#E8622A; --o500:#FF7A2F; --o100:#FFE6D6;
  --t500:#0FA6A0; --t100:#D9F2F1;
  --ink:#0E1B33; --ink2:#4B5A78; --ink3:#8A97AE;
  --bg:#F4F7FC; --panel:#FFFFFF; --panel2:#EDF2FA;
  --line:#DFE6F2; --line2:#C9D4E8;
  --ok:#17A673; --warn:#E0A22E; --err:#D9453A;
  --r8:8px; --r10:10px; --r14:14px; --r16:16px;
  --sh-sm:0 2px 8px -4px rgba(14,27,51,.12);
  --sh-md:0 8px 24px -14px rgba(14,27,51,.20);
  --sh-lg:0 20px 40px -22px rgba(23,52,124,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar:240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px; line-height:1.8; color:var(--ink); background:var(--bg);
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
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,p,figure{margin:0}
:focus-visible{outline:3px solid rgba(44,103,216,.35);outline-offset:2px;border-radius:6px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--c700);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;z-index:200}
.skip-link:focus{left:0}

/* ============ 布局骨架 ============ */
.page{margin-left:var(--sidebar);min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}

/* ============ 左侧固定导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:240px;z-index:60;
  background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;overflow-y:auto;overflow-x:hidden;
  transition:width .22s var(--ease),box-shadow .22s var(--ease);
}
.brand{display:flex;align-items:center;gap:10px;height:88px;padding:0 20px;flex:none;border-bottom:1px solid var(--line)}
.brand-mark{
  width:28px;height:28px;flex:none;display:grid;place-items:center;border-radius:9px;
  background:linear-gradient(140deg,var(--c500),var(--c700));color:#fff;
}
.brand-name{font-size:16px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;color:var(--ink)}
.side-nav{display:flex;flex-direction:column;gap:2px;padding:16px 12px;flex:1 1 auto}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;height:44px;padding:0 12px;
  border-radius:10px;color:var(--ink2);font-size:15px;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-item svg{width:20px;height:20px;flex:none}
.nav-item:hover{background:var(--c050);color:var(--c600)}
.nav-item.is-active{background:var(--c050);color:var(--c700);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:-12px;top:10px;bottom:10px;width:3px;border-radius:0 3px 3px 0;background:var(--c500);
}
.side-foot{flex:none;padding:16px 20px 24px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px}
.side-link{font-size:13px;color:var(--ink2);transition:color .2s var(--ease)}
.side-link:hover{color:var(--c600)}
.side-copy{font-size:12px;color:var(--ink3);line-height:1.6}

/* ============ 移动端顶栏与抽屉 ============ */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:70;
  background:#fff;border-bottom:1px solid var(--line);align-items:center;justify-content:space-between;
  padding:0 16px;transition:box-shadow .2s var(--ease);
}
.topbar.is-scrolled{box-shadow:var(--sh-md)}
.topbar-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;color:var(--ink)}
.hamburger{
  width:44px;height:44px;display:grid;place-items:center;border-radius:10px;color:var(--ink);
  transition:background .2s var(--ease);
}
.hamburger:hover{background:var(--c050)}
.hamburger svg{width:22px;height:22px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,27,51,.45);z-index:85;
  opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:280px;max-width:84vw;background:#fff;z-index:90;
  transform:translateX(100%);transition:transform .28s var(--ease);
  display:none;flex-direction:column;overflow-y:auto;
}
.drawer.is-open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:60px;padding:0 16px;border-bottom:1px solid var(--line);flex:none}
.drawer-head strong{font-size:16px;font-weight:700}
.drawer-close{width:44px;height:44px;display:grid;place-items:center;border-radius:10px}
.drawer-close:hover{background:var(--c050)}
.drawer-nav{display:flex;flex-direction:column;padding:12px}
.drawer-nav .nav-item{height:48px;font-size:15px}
.drawer-foot{padding:16px;border-top:1px solid var(--line);margin-top:auto}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:10px;font-size:16px;font-weight:600;
  transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),color .2s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--c500);color:#fff;box-shadow:var(--sh-sm)}
.btn-primary:hover{background:var(--c600);transform:translateY(-2px);box-shadow:var(--sh-md)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-sm)}
.btn-accent{background:var(--o500);color:#fff;box-shadow:var(--sh-sm)}
.btn-accent:hover{background:var(--o600);transform:translateY(-2px);box-shadow:var(--sh-md)}
.btn-accent:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--c600);border:1px solid var(--line)}
.btn-ghost:hover{background:var(--c050);border-color:var(--c100);transform:translateY(-2px)}
.btn-text{color:var(--c600);font-weight:600;padding:0;height:auto;border-radius:6px;text-underline-offset:4px}
.btn-text:hover{text-decoration:underline;color:var(--c700)}
.btn-sm{height:34px;padding:0 14px;font-size:14px;border-radius:8px}
.btn-block{width:100%}

.badge{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:500;white-space:nowrap}
.badge-primary{background:var(--c050);color:var(--c700)}
.badge-accent{background:var(--o100);color:var(--o600)}
.badge-neutral{background:var(--panel2);color:var(--ink2)}
.badge-teal{background:var(--t100);color:var(--t500)}

.pill{display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;border-radius:999px;background:var(--c050);color:var(--c700);font-size:13px;font-weight:600}
.pill::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--o500)}

.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-alt{background:var(--panel2)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{font-size:30px;line-height:1.3;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.section-desc{margin-top:8px;font-size:15px;color:var(--ink2);max-width:660px}
.text-link{font-size:15px;font-weight:600;color:var(--c600);text-decoration:underline;text-underline-offset:4px;white-space:nowrap}
.text-link:hover{color:var(--c700)}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;padding:76px 0 92px;
  background:linear-gradient(180deg,#EAF1FD 0%,#F4F7FC 100%);
}
.hero::after{
  content:"";position:absolute;top:-120px;right:-140px;width:520px;height:520px;
  border:1px solid var(--line2);border-radius:50%;opacity:.7;pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;z-index:2}
.hero-copy{max-width:560px}
.hero h1{
  font-size:42px;line-height:1.22;font-weight:700;letter-spacing:-.01em;color:var(--ink);
  margin:20px 0 16px;
}
.hero-sub{font-size:17px;line-height:1.8;color:var(--ink2);max-width:480px}
.hero-cta{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.trust-row{display:flex;flex-wrap:wrap;gap:20px;margin-top:28px}
.trust-row li{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--ink2)}
.trust-row li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--t500);flex:none}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:16px;box-shadow:var(--sh-lg)}
.hero-float{
  position:absolute;right:18px;bottom:18px;background:#fff;border-radius:14px;
  padding:12px 18px;box-shadow:var(--sh-md);display:flex;flex-direction:column;gap:2px;
}
.hero-float strong{font-size:22px;font-weight:700;color:var(--c700);line-height:1.1}
.hero-float span{font-size:12px;color:var(--ink3)}

/* ============ 热门板块网格 ============ */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{
  background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  box-shadow:var(--sh-sm);display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(44,103,216,.3)}
.fc-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--panel2)}
.fc-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.feature-card:hover .fc-media img{transform:scale(1.03)}
.fc-badge{position:absolute;left:12px;top:12px;box-shadow:var(--sh-sm)}
.fc-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.fc-body h3{font-size:18px;line-height:1.45;font-weight:600;color:var(--ink)}
.fc-body p{font-size:14px;line-height:1.7;color:var(--ink2)}
.fc-foot{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.fc-spec{font-size:13px;color:var(--ink3)}

/* ============ 评价轮播 ============ */
.carousel-nav{display:flex;gap:8px}
.cbtn{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:#fff;
  display:grid;place-items:center;color:var(--ink2);font-size:20px;line-height:1;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.cbtn:hover{background:var(--c050);color:var(--c600);border-color:var(--c100)}
.carousel{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 4px 20px;scrollbar-width:none;-ms-overflow-style:none;
}
.carousel::-webkit-scrollbar{display:none}
.review-card{
  flex:0 0 360px;scroll-snap-align:start;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:24px;box-shadow:var(--sh-sm);display:flex;flex-direction:column;gap:16px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md)}
.stars{color:var(--o500);font-size:15px;letter-spacing:2px}
.review-text{font-size:15px;line-height:1.75;color:var(--ink2);display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.review-user{display:flex;align-items:center;gap:12px;margin-top:auto}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:none;display:grid;place-items:center;
  background:var(--c100);color:var(--c700);font-size:15px;font-weight:700;
}
.review-user strong{display:block;font-size:14px;font-weight:600;color:var(--ink);line-height:1.4}
.review-user span{font-size:13px;color:var(--ink3)}

/* ============ 保障条 ============ */
.guarantee{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.guarantee-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:32px 0}
.g-item{display:flex;gap:14px;align-items:flex-start}
.g-icon{
  width:44px;height:44px;flex:none;border-radius:12px;display:grid;place-items:center;
  background:var(--c050);color:var(--c600);
}
.g-icon svg{width:22px;height:22px}
.g-item strong{display:block;font-size:15px;font-weight:600;color:var(--ink);line-height:1.6}
.g-item p{font-size:13px;color:var(--ink2);line-height:1.7}

/* ============ 深色转化条 ============ */
.cta-bar{
  background:#0E1B33;border-radius:16px;padding:40px;position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-bar::after{
  content:"";position:absolute;right:-120px;top:-160px;width:400px;height:400px;
  border:1px solid rgba(201,212,232,.35);border-radius:50%;pointer-events:none;
}
.cta-text{position:relative;z-index:2}
.cta-text h2{font-size:22px;line-height:1.4;font-weight:700;color:#fff}
.cta-text p{margin-top:8px;font-size:13px;color:#C3CEE4}
.cta-actions{position:relative;z-index:2;display:flex;gap:12px;flex-wrap:wrap}
.cta-actions .btn-ghost{background:transparent;color:#fff;border-color:rgba(195,206,228,.4)}
.cta-actions .btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(195,206,228,.7)}

/* ============ 最新资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;
  box-shadow:var(--sh-sm);display:flex;flex-direction:column;gap:12px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(44,103,216,.3)}
.news-card h3{font-size:17px;line-height:1.5;font-weight:600;color:var(--ink)}
.news-card h3 a{transition:color .2s var(--ease)}
.news-card:hover h3 a{color:var(--c600)}
.news-summary{font-size:14px;line-height:1.7;color:var(--ink2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:10px;border-top:1px solid var(--line)}
.news-time{font-size:13px;color:var(--ink3)}
.empty-state{
  min-height:180px;border:1px dashed var(--line2);border-radius:14px;background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--ink3);
}
.empty-state svg{width:40px;height:40px;color:var(--c300)}
.empty-state p{font-size:15px}

/* ============ 服务索引面板 ============ */
.index-panel{display:grid;grid-template-columns:320px 1fr;gap:32px;align-items:start}
.index-list{display:flex;flex-direction:column;gap:4px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px;box-shadow:var(--sh-sm)}
.index-item{
  display:flex;align-items:center;gap:12px;height:52px;padding:0 14px;border-radius:10px;
  font-size:15px;color:var(--ink2);text-align:left;width:100%;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.index-item .idx{font-size:13px;font-weight:700;color:var(--c300);flex:none;letter-spacing:.04em}
.index-item:hover{background:var(--c050);color:var(--c600)}
.index-item.is-active{background:var(--c050);color:var(--c700);font-weight:600}
.index-item.is-active .idx{color:var(--c500)}
.index-pane{
  display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:32px;
  box-shadow:var(--sh-sm);
}
.index-pane.is-active{display:block;animation:fadeUp .28s var(--ease) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.index-pane h3{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:12px}
.index-pane p{font-size:15px;line-height:1.85;color:var(--ink2);margin-bottom:14px}
.index-pane img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px;margin-top:8px}
.pane-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}

/* ============ FAQ ============ */
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:start}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:border-color .2s var(--ease)}
.faq-item.is-open{border-color:rgba(44,103,216,.35)}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:12px 20px;font-size:15px;font-weight:600;color:var(--ink);text-align:left;
}
.faq-q:hover{color:var(--c600)}
.faq-icon{width:20px;height:20px;flex:none;position:relative}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--c500);border-radius:2px;transition:transform .25s var(--ease)}
.faq-icon::before{left:0;top:9px;width:20px;height:2px}
.faq-icon::after{left:9px;top:0;width:2px;height:20px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .28s var(--ease)}
.faq-item.is-open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a p{padding:0 20px 18px;font-size:15px;line-height:1.8;color:var(--ink2)}

/* ============ 页脚 ============ */
.footer{background:#0E1B33;color:#B9C4DA;margin-top:auto}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:64px 0 40px}
.footer-logo{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;color:#fff}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:#B9C4DA;max-width:340px}
.footer-contact{margin-top:16px;font-size:13px;color:#8A97AE;line-height:1.9}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:#B9C4DA;transition:color .2s var(--ease)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-bottom{border-top:1px solid rgba(201,212,232,.16)}
.footer-bottom .container{padding-top:20px;padding-bottom:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom p{font-size:13px;color:#8A97AE}

/* ============ 响应式 ============ */
@media (max-width:1439px){
  .grid-4{gap:20px}
  .news-grid{gap:20px}
}
@media (max-width:1279px){
  :root{--sidebar:88px}
  .sidebar{width:88px}
  .brand{padding:0 30px}
  .brand-name{display:none}
  .nav-item{padding:0 22px}
  .nav-item span{display:none}
  .side-foot{display:none}
  .sidebar:hover,.sidebar:focus-within{width:240px;box-shadow:var(--sh-md)}
  .sidebar:hover .brand,.sidebar:focus-within .brand{padding:0 20px}
  .sidebar:hover .brand-name,.sidebar:focus-within .brand-name{display:inline}
  .sidebar:hover .nav-item,.sidebar:focus-within .nav-item{padding:0 12px}
  .sidebar:hover .nav-item span,.sidebar:focus-within .nav-item span{display:inline}
  .sidebar:hover .side-foot,.sidebar:focus-within .side-foot{display:block}
  .grid-4{grid-template-columns:repeat(3,1fr)}
  .hero-grid{gap:36px}
  .hero h1{font-size:36px}
  .faq-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px}
}
@media (max-width:1023px){
  :root{--sidebar:0px}
  .sidebar{display:none}
  .topbar{display:flex}
  .drawer{display:flex}
  .page{padding-top:60px}
  .container{padding:0 20px}
  .section{padding:64px 0}
  .section-tight{padding:48px 0}
  .hero{padding:48px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-copy{max-width:none}
  .hero h1{font-size:30px}
  .hero-sub{font-size:16px;max-width:none}
  .grid-4{grid-template-columns:repeat(2,1fr);gap:16px}
  .news-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .guarantee-inner{grid-template-columns:repeat(2,1fr);gap:20px}
  .index-panel{grid-template-columns:1fr;gap:20px}
  .index-list{flex-direction:row;overflow-x:auto;padding:10px;scrollbar-width:none}
  .index-list::-webkit-scrollbar{display:none}
  .index-item{flex:0 0 auto;padding:0 16px}
  .index-pane{padding:24px}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:32px 24px;gap:24px}
  .cta-actions{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  .section{padding:48px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:24px}
  .section-head h2{font-size:23px}
  .grid-4{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .hero h1{font-size:28px}
  .hero-cta{flex-direction:column}
  .hero-cta .btn{width:100%}
  .hero-float{right:12px;bottom:12px;padding:10px 14px}
  .hero-float strong{font-size:18px}
  .review-card{flex:0 0 260px;padding:20px}
  .guarantee-inner{grid-template-columns:1fr;gap:16px;padding:24px 0}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .cta-text h2{font-size:19px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom .container{flex-direction:column;gap:8px}
}
@media (max-width:519px){
  body{font-size:15.5px}
  .container{padding:0 16px}
  .hero{padding:36px 0 48px}
  .hero h1{font-size:26px}
  .hero::after{display:none}
  .fc-body{padding:16px}
  .index-pane{padding:20px}
  .btn{height:44px;padding:0 18px;font-size:15px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --ink:#0E1B33;
  --ink-2:#4B5A78;
  --ink-3:#8A97AE;
  --bg:#F4F7FC;
  --panel:#FFFFFF;
  --sub:#EDF2FA;
  --dark:#0E1B33;
  --p700:#17347C;
  --p600:#1E46A8;
  --p500:#2C67D8;
  --p300:#7FA4E8;
  --p100:#DCE7FB;
  --p050:#EEF4FE;
  --o600:#E8622A;
  --o500:#FF7A2F;
  --o100:#FFE6D6;
  --teal:#0FA6A0;
  --teal-100:#D9F2F1;
  --line:#DFE6F2;
  --line-2:#C9D4E8;
  --ok:#17A673;
  --ok-bg:#E8F7F1;
  --warn:#E0A22E;
  --err:#D9453A;
  --sh-sm:0 2px 8px -4px rgba(14,27,51,.12);
  --sh-md:0 8px 24px -14px rgba(14,27,51,.20);
  --sh-lg:0 20px 40px -22px rgba(23,52,124,.28);
  --r-s:8px;
  --r-m:10px;
  --r-c:14px;
  --r-l:16px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar:240px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:3px solid rgba(44,103,216,.45);outline-offset:2px;border-radius:6px;}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;background:var(--p700);color:#fff;
  padding:10px 16px;border-radius:0 0 var(--r-m) 0;
}
.skip-link:focus{left:0;}

/* ---------- 左侧导航 ---------- */
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--sidebar);
  background:var(--panel);border-right:1px solid var(--line);
  display:flex;flex-direction:column;z-index:70;
  transition:width .24s var(--ease),box-shadow .24s var(--ease);
  overflow-y:auto;
}
.sidebar-brand{
  min-height:88px;display:flex;align-items:center;gap:10px;
  padding:16px 20px;border-bottom:1px solid var(--line);
}
.brand-mark{
  width:32px;height:32px;flex:none;border-radius:10px;color:#fff;
  background:linear-gradient(135deg,var(--p700),var(--p500));
  display:grid;place-items:center;box-shadow:var(--sh-sm);
}
.brand-text{font-size:16px;font-weight:700;line-height:1.25;letter-spacing:.01em;}
.side-nav{padding:16px 12px;display:flex;flex-direction:column;gap:4px;flex:1 1 auto;}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;
  min-height:44px;padding:0 12px;border-radius:var(--r-m);
  color:var(--ink-2);font-size:15px;transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-item svg{width:20px;height:20px;flex:none;}
.nav-item:hover{background:var(--p050);color:var(--p700);}
.nav-item.is-active{background:var(--p050);color:var(--p700);font-weight:600;}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:2px;background:var(--p500);
}
.sidebar-foot{
  padding:16px 20px 22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-3);line-height:1.7;
}
.sidebar-foot a{color:var(--ink-2);border-bottom:1px solid transparent;transition:.2s;}
.sidebar-foot a:hover{color:var(--p600);border-bottom-color:var(--p300);}
.sidebar-foot .foot-mail{display:block;margin-top:6px;}

/* ---------- 移动端顶部 ---------- */
.mobile-header{
  position:sticky;top:0;z-index:80;height:60px;display:none;
  align-items:center;justify-content:space-between;padding:0 20px;
  background:var(--panel);border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.mobile-header.is-scrolled{box-shadow:var(--sh-md);}
.mobile-brand{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700;}
.mobile-brand .brand-mark{width:28px;height:28px;border-radius:9px;}
.burger{
  width:44px;height:44px;display:grid;place-items:center;border-radius:var(--r-m);
  color:var(--ink);transition:background .2s;
}
.burger:hover{background:var(--p050);}
.burger span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}

.drawer-mask{
  position:fixed;inset:0;background:rgba(14,27,51,.45);opacity:0;visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s;z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:280px;max-width:84vw;background:var(--panel);
  transform:translateX(100%);transition:transform .28s var(--ease);z-index:100;
  display:flex;flex-direction:column;padding:18px 14px 20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;}
.drawer-title{font-size:14px;font-weight:700;color:var(--ink-3);letter-spacing:.04em;}
.drawer-close{width:44px;height:44px;display:grid;place-items:center;border-radius:var(--r-m);color:var(--ink-2);}
.drawer-close:hover{background:var(--p050);}
.drawer .nav-item{height:48px;font-size:15px;}
.drawer-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;justify-content:center;}

/* ---------- 主体骨架 ---------- */
.main-wrap{margin-left:var(--sidebar);min-height:100vh;display:flex;flex-direction:column;}
.container{width:calc(100% - 64px);max-width:1240px;margin:0 auto;}
main{padding-bottom:0;}

/* ---------- 通用组件 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:500;line-height:1;white-space:nowrap;
}
.badge-primary{background:var(--p050);color:var(--p700);}
.badge-accent{background:var(--o100);color:var(--o600);}
.badge-neutral{background:var(--sub);color:var(--ink-2);}
.badge-teal{background:var(--teal-100);color:var(--teal);}

.btn{
  display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 24px;
  border-radius:var(--r-m);font-size:16px;font-weight:600;line-height:1;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--p500);color:#fff;box-shadow:var(--sh-sm);}
.btn-primary:hover{background:var(--p600);transform:translateY(-2px);box-shadow:var(--sh-md);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-sm);}
.btn-outline{background:#fff;color:var(--p600);border:1px solid var(--line);}
.btn-outline:hover{background:var(--p050);border-color:var(--p300);transform:translateY(-2px);}
.btn-accent{background:var(--o500);color:#fff;box-shadow:var(--sh-sm);}
.btn-accent:hover{background:var(--o600);transform:translateY(-2px);box-shadow:var(--sh-md);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--p600);font-weight:600;font-size:15px;
  border-bottom:1px solid var(--p300);padding-bottom:2px;text-underline-offset:4px;
  transition:color .2s,border-color .2s;
}
.btn-text:hover{color:var(--p700);border-bottom-color:var(--p700);}

.section{padding:88px 0;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:36px;flex-wrap:wrap;
}
.section-head h2{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.01em;}
.section-head p{margin-top:8px;color:var(--ink-2);font-size:15px;max-width:640px;}
.section-sub{color:var(--ink-2);font-size:15px;max-width:820px;}

/* ---------- 页头 / Hero ---------- */
.page-hero{
  background:var(--p050);
  border-bottom:1px solid var(--line);
  padding:40px 0 72px;
  position:relative;
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;right:-120px;top:-60px;width:520px;height:520px;
  border-radius:50%;border:1px solid var(--line-2);
  opacity:.7;pointer-events:none;
}
.crumbs{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);
  margin-bottom:28px;flex-wrap:wrap;position:relative;z-index:2;
}
.crumbs a{color:var(--ink-2);transition:color .2s;}
.crumbs a:hover{color:var(--p600);}
.crumbs .sep{color:var(--line-2);}
.crumbs .current{color:var(--ink-3);}
.hero-grid{
  display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center;
  position:relative;z-index:2;
}
.hero-copy h1{
  font-size:42px;line-height:1.22;font-weight:700;letter-spacing:-.01em;margin:18px 0 18px;
}
.hero-copy .lead{
  font-size:16px;line-height:1.85;color:var(--ink-2);max-width:640px;
}
.cta-row{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap;}
.trust-row{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap;}
.trust-row .badge{height:28px;font-size:13px;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:var(--r-l);
  box-shadow:var(--sh-lg);
}
.hero-float{
  position:absolute;left:-16px;bottom:-18px;width:220px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-c);box-shadow:var(--sh-md);
  padding:16px 18px;
}
.hero-float strong{display:block;font-size:22px;font-weight:700;color:var(--p700);line-height:1.2;}
.hero-float span{display:block;font-size:13px;color:var(--ink-3);margin-top:4px;}

/* ---------- 图文交替长列表 ---------- */
.alt-list{border-top:1px solid var(--line);}
.alt-row{
  display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;
  padding:56px 0;border-bottom:1px solid var(--line);
}
.alt-row.is-reverse{grid-template-columns:7fr 5fr;}
.alt-row.is-reverse .alt-media{order:2;}
.alt-media{
  border-radius:12px;overflow:hidden;box-shadow:var(--sh-sm);
  background:var(--sub);
}
.alt-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:12px;
  transition:transform .3s var(--ease);
}
.alt-media:hover img{transform:scale(1.03);}
.alt-body h2{font-size:28px;line-height:1.32;font-weight:700;margin:14px 0 14px;}
.alt-body p{color:var(--ink-2);font-size:16px;line-height:1.85;max-width:640px;}
.alt-body .btn-text{margin-top:18px;}

/* ---------- 覆盖范围 ---------- */
.range-panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-l);
  box-shadow:var(--sh-sm);padding:36px;
}
.stat-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding-bottom:28px;margin-bottom:28px;border-bottom:1px solid var(--line);
}
.stat-item .num{font-size:30px;font-weight:700;color:var(--p700);line-height:1.1;letter-spacing:-.02em;}
.stat-item .lab{font-size:13px;color:var(--ink-3);margin-top:6px;}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;}
.tag-cloud .badge{height:30px;padding:0 14px;font-size:13px;transition:background .2s,color .2s;}
.tag-cloud .badge:hover{background:var(--p100);color:var(--p700);}

/* ---------- 保障条 ---------- */
.guard{
  background:var(--sub);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.guard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:32px 0;}
.guard-item{display:flex;gap:14px;align-items:flex-start;}
.guard-icon{
  width:44px;height:44px;flex:none;border-radius:12px;background:#fff;
  display:grid;place-items:center;color:var(--p600);box-shadow:var(--sh-sm);
}
.guard-icon svg{width:22px;height:22px;}
.guard-item h3{font-size:15px;font-weight:600;line-height:1.5;}
.guard-item p{font-size:13px;color:var(--ink-3);line-height:1.7;}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;align-items:start;}
.faq-item{
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item:hover{border-color:var(--line-2);box-shadow:var(--sh-sm);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 20px;text-align:left;font-size:15px;font-weight:600;color:var(--ink);
}
.faq-q .icon{
  width:20px;height:20px;flex:none;position:relative;color:var(--p500);
  transition:transform .24s var(--ease);
}
.faq-q .icon::before,.faq-q .icon::after{
  content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-q .icon::before{width:14px;height:2px;}
.faq-q .icon::after{width:2px;height:14px;transition:opacity .2s var(--ease);}
.faq-item.is-open .faq-q .icon::after{opacity:0;}
.faq-item.is-open{border-color:var(--p300);box-shadow:var(--sh-sm);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .3s var(--ease);
}
.faq-a p{
  padding:0 20px 18px;font-size:15px;line-height:1.8;color:var(--ink-2);
}

/* ---------- CTA 条 ---------- */
.cta-band{padding:0 0 88px;}
.cta-inner{
  background:var(--dark);border-radius:var(--r-l);padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  position:relative;overflow:hidden;
}
.cta-inner::after{
  content:"";position:absolute;right:-80px;bottom:-140px;width:340px;height:340px;
  border-radius:50%;border:1px solid rgba(201,212,232,.28);pointer-events:none;
}
.cta-inner h2{color:#fff;font-size:22px;font-weight:700;line-height:1.4;}
.cta-inner p{color:#C3CEE4;font-size:13px;margin-top:8px;}
.cta-actions{display:flex;gap:12px;flex:none;position:relative;z-index:2;}
.cta-actions .btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.28);}
.cta-actions .btn-outline:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.5);}

/* ---------- 相关分类 ---------- */
.relate{padding:0 0 88px;}
.relate-title{font-size:18px;font-weight:600;margin-bottom:18px;}
.relate-cloud{display:flex;flex-wrap:wrap;gap:12px;}
.relate-cloud a{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;border-radius:999px;
  background:#fff;border:1px solid var(--line);font-size:14px;color:var(--ink-2);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.relate-cloud a:hover{background:var(--p050);color:var(--p700);border-color:var(--p300);transform:translateY(-2px);}

/* ---------- 页脚 ---------- */
.footer{background:var(--dark);color:#C3CEE4;margin-top:auto;padding-top:64px;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;
}
.footer-logo{display:inline-flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:700;margin-bottom:16px;}
.footer-logo .brand-mark{background:linear-gradient(135deg,var(--p500),var(--teal));}
.footer-brand p{font-size:14px;line-height:1.85;color:#B9C4DA;margin-bottom:12px;max-width:360px;}
.footer-contact{font-size:13px;color:var(--ink-3);line-height:1.9;}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col li{margin-bottom:12px;}
.footer-col a{font-size:14px;color:#B9C4DA;transition:color .2s,border-color .2s;border-bottom:1px solid transparent;}
.footer-col a:hover{color:#fff;border-bottom-color:#fff;}
.footer-bottom{border-top:1px solid rgba(201,212,232,.16);padding:20px 0;font-size:13px;color:var(--ink-3);}
.footer-bottom .container{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;}

/* ---------- 响应式 ---------- */
@media (max-width:1439px){
  .container{max-width:1160px;}
}
@media (max-width:1279px) and (min-width:1024px){
  :root{--sidebar:88px;}
  .sidebar-brand{padding:16px 0;justify-content:center;}
  .sidebar-brand .brand-text{display:none;}
  .side-nav{padding:16px 12px;align-items:center;}
  .nav-item{justify-content:center;width:56px;padding:0;}
  .nav-item span{display:none;}
  .sidebar-foot{display:none;}
  .sidebar:hover{width:240px;box-shadow:var(--sh-lg);}
  .sidebar:hover .brand-text{display:block;}
  .sidebar:hover .sidebar-brand{justify-content:flex-start;padding:16px 20px;}
  .sidebar:hover .side-nav{align-items:stretch;}
  .sidebar:hover .nav-item{width:auto;padding:0 12px;justify-content:flex-start;}
  .sidebar:hover .nav-item span{display:inline;}
  .sidebar:hover .sidebar-foot{display:block;}
  .hero-copy h1{font-size:36px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .guard-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:1023px){
  :root{--sidebar:0px;}
  .sidebar{display:none;}
  .mobile-header{display:flex;}
  .main-wrap{margin-left:0;}
  .container{width:calc(100% - 40px);}
  .section{padding:64px 0;}
  .page-hero{padding:24px 0 56px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-copy h1{font-size:32px;}
  .hero-float{position:static;width:100%;margin-top:16px;}
  .alt-row,.alt-row.is-reverse{grid-template-columns:1fr;gap:24px;padding:40px 0;}
  .alt-row.is-reverse .alt-media{order:0;}
  .alt-body h2{font-size:24px;}
  .faq-grid{grid-template-columns:1fr;}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:32px;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;justify-content:center;}
  .cta-band{padding:0 0 64px;}
  .relate{padding:0 0 64px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .section{padding:48px 0;}
  .section-head{margin-bottom:24px;}
  .section-head h2{font-size:23px;}
  .hero-copy h1{font-size:28px;}
  .stat-grid{grid-template-columns:1fr 1fr;gap:16px;}
  .guard-grid{grid-template-columns:1fr 1fr;gap:20px;}
  .range-panel{padding:24px;}
  .alt-body h2{font-size:22px;}
  .cta-band{padding:0 0 48px;}
  .relate{padding:0 0 48px;}
  .footer{padding-top:48px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-inner h2{font-size:20px;}
}
@media (max-width:479px){
  body{font-size:15.5px;}
  .container{width:calc(100% - 32px);}
  .hero-copy h1{font-size:26px;}
  .stat-grid{grid-template-columns:1fr;}
  .guard-grid{grid-template-columns:1fr;}
  .page-hero::after{display:none;}
  .cta-inner{padding:24px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important;}
  .btn:hover,.relate-cloud a:hover,.alt-media:hover img{transform:none;}
}

/* roulang page: article */
:root{
  --c-700:#17347C;
  --c-600:#1E46A8;
  --c-500:#2C67D8;
  --c-300:#7FA4E8;
  --c-100:#DCE7FB;
  --c-050:#EEF4FE;
  --o-600:#E8622A;
  --o-500:#FF7A2F;
  --o-100:#FFE6D6;
  --t-500:#0FA6A0;
  --t-100:#D9F2F1;
  --bg:#F4F7FC;
  --panel:#FFFFFF;
  --sub:#EDF2FA;
  --dark:#0E1B33;
  --text:#0E1B33;
  --text-2:#4B5A78;
  --text-3:#8A97AE;
  --line:#DFE6F2;
  --line-2:#C9D4E8;
  --ok:#17A673;
  --warn:#E0A22E;
  --err:#D9453A;
  --sh-sm:0 2px 8px -4px rgba(14,27,51,.12);
  --sh-md:0 8px 24px -14px rgba(14,27,51,.20);
  --sh-lg:0 20px 40px -22px rgba(23,52,124,.28);
  --r-xs:8px;
  --r-sm:10px;
  --r-card:14px;
  --r-lg:16px;
  --side:240px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-left:var(--side);
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--c-500);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--c-600)}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;color:var(--text)}
p{margin:0}
:focus-visible{outline:3px solid rgba(44,103,216,.35);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}

/* ============ 左侧栏导航 ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--side);
  background:#fff;
  border-right:1px solid var(--line);
  z-index:60;
  overflow-y:auto;
  transition:width .22s var(--ease);
}
.sidebar-inner{display:flex;flex-direction:column;min-height:100%;padding:0 12px 20px}
.brand{
  display:flex;align-items:center;gap:10px;
  height:88px;padding:0 8px;
  color:var(--text);text-decoration:none;
  flex:0 0 auto;
}
.brand:hover{color:var(--c-700)}
.brand-mark{
  width:30px;height:30px;flex:0 0 30px;
  display:grid;place-items:center;
  border-radius:9px;
  background:linear-gradient(140deg,var(--c-700),var(--c-500));
  color:#fff;
}
.brand-name{font-size:16px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.side-nav{display:flex;flex-direction:column;gap:4px;margin-top:8px;flex:1 1 auto}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:12px;
  min-height:44px;padding:0 12px;
  border-radius:var(--r-sm);
  color:var(--text-2);
  font-size:15px;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-item svg{width:20px;height:20px;flex:0 0 20px;stroke:currentColor}
.nav-item span{white-space:nowrap}
.nav-item:hover{background:var(--c-050);color:var(--c-600)}
.nav-item.is-active{background:var(--c-050);color:var(--c-700);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:2px;background:var(--c-500);
}
.sidebar-foot{margin-top:24px;padding:16px 12px 0;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px}
.side-search{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--r-sm);
  font-size:13px;color:var(--text-2);
}
.side-search:hover{border-color:var(--c-300);background:var(--c-050);color:var(--c-600)}
.side-link{font-size:13px;color:var(--text-2)}
.side-link:hover{color:var(--c-600)}
.side-note{font-size:12px;line-height:1.6;color:var(--text-3)}

/* ============ 移动端顶栏与抽屉 ============ */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:60px;
  align-items:center;justify-content:space-between;
  padding:0 16px;background:#fff;border-bottom:1px solid var(--line);
  z-index:70;
  transition:box-shadow .2s var(--ease);
}
.topbar.is-scrolled{box-shadow:var(--sh-md)}
.topbar-logo{display:flex;align-items:center;gap:9px;color:var(--text);font-size:15px;font-weight:700}
.topbar-logo .brand-mark{width:26px;height:26px;flex:0 0 26px}
.burger{
  width:44px;height:44px;display:grid;place-items:center;
  border-radius:var(--r-sm);color:var(--text-2);
}
.burger:hover{background:var(--c-050);color:var(--c-600)}
.burger svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,27,51,.45);
  opacity:0;visibility:hidden;transition:opacity .2s var(--ease),visibility .2s;z-index:80;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;
  width:280px;max-width:84vw;
  background:#fff;z-index:90;
  transform:translateX(100%);
  transition:transform .25s var(--ease);
  display:flex;flex-direction:column;
  padding:16px 14px 20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:48px;margin-bottom:8px}
.drawer-title{font-size:15px;font-weight:700;color:var(--text)}
.drawer-close{width:44px;height:44px;display:grid;place-items:center;border-radius:var(--r-sm);color:var(--text-2)}
.drawer-close:hover{background:var(--c-050);color:var(--c-600)}
.drawer-close svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round}
.drawer .nav-item{height:48px;font-size:15px}
.drawer-cta{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
}
.drawer-cta a{
  display:flex;align-items:center;justify-content:center;
  height:46px;border-radius:var(--r-sm);
  background:var(--c-500);color:#fff;font-weight:600;
}
.drawer-cta a:hover{background:var(--c-600);color:#fff}

/* ============ 文章页主体 ============ */
.page{padding:8px 0 0}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:20px 0 4px;font-size:13px;color:var(--text-3);
}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--c-500)}
.breadcrumb .sep{color:var(--line-2)}
.breadcrumb .current{
  color:var(--text-3);
  max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:40px;align-items:start;padding-bottom:8px}
.article-main{min-width:0}

.article-head{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-sm);
  padding:36px 36px 30px;
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:500;
}
.badge-primary{background:var(--c-050);color:var(--c-700)}
.badge-accent{background:var(--o-100);color:var(--o-600)}
.badge-neutral{background:var(--sub);color:var(--text-2)}
.article-head h1{font-size:32px;line-height:1.28;letter-spacing:-.01em;margin:16px 0 18px;max-width:820px}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  font-size:13px;color:var(--text-3);
  padding-top:16px;border-top:1px solid var(--line);
}
.article-meta .m-item{display:inline-flex;align-items:center;gap:6px}
.article-meta svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round}
.share-group{display:flex;align-items:center;gap:8px;margin-left:auto}
.share-btn{
  display:inline-flex;align-items:center;gap:6px;
  height:32px;padding:0 12px;border-radius:999px;
  border:1px solid var(--line);font-size:13px;color:var(--text-2);
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.share-btn:hover{background:var(--c-050);border-color:var(--c-300);color:var(--c-600);transform:translateY(-2px)}
.share-btn svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round}

.article-cover{margin-top:28px}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-md)}
.article-cover figcaption{margin-top:10px;font-size:13px;color:var(--text-3);text-align:center}

.article-panel{
  margin-top:28px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-sm);padding:36px;
}
.article-body{max-width:820px;font-size:17px;line-height:1.9;color:var(--text)}
.article-body p{margin:0 0 1.15em}
.article-body h2{
  font-size:23px;line-height:1.35;font-weight:700;color:var(--text);
  margin:40px 0 16px;padding-left:12px;border-left:4px solid var(--c-500);
}
.article-body h3{font-size:19px;font-weight:600;margin:28px 0 12px;color:var(--text)}
.article-body h4{font-size:17px;font-weight:600;margin:22px 0 10px;color:var(--text-2)}
.article-body ul,.article-body ol{margin:0 0 1.15em;padding-left:22px}
.article-body li{line-height:1.9;margin-bottom:6px}
.article-body ul li::marker{color:var(--c-500);font-size:1.05em}
.article-body ol li::marker{color:var(--c-500);font-weight:600}
.article-body blockquote{
  margin:22px 0;padding:20px 22px;background:var(--c-050);
  border-left:3px solid var(--c-500);border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:16px;color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:22px 0 10px;max-width:100%;height:auto}
.article-body table{
  width:100%;border-collapse:separate;border-spacing:0;margin:22px 0;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:15px;
}
.article-body th,.article-body td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
.article-body th{background:var(--sub);font-weight:600;color:var(--text)}
.article-body tr:last-child td{border-bottom:0}
.article-body pre{
  background:var(--bg);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:16px;overflow-x:auto;font-size:14px;line-height:1.7;
  font-family:"JetBrains Mono",Consolas,"Courier New",monospace;color:var(--text-2);
}
.article-body code{
  background:var(--bg);border-radius:6px;padding:2px 6px;font-size:.92em;
  font-family:"JetBrains Mono",Consolas,"Courier New",monospace;color:var(--c-600);
}
.article-body pre code{background:none;padding:0;color:inherit}
.article-body a{color:var(--c-500);text-decoration:underline;text-underline-offset:4px}
.article-body a:hover{color:var(--c-600)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

.empty-state{
  border:1px dashed var(--line-2);border-radius:var(--r-card);
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:var(--panel);text-align:center;padding:32px;
}
.empty-state svg{width:40px;height:40px;stroke:var(--c-300);fill:none;stroke-width:1.6;stroke-linecap:round}
.empty-state p{font-size:15px;color:var(--text-3)}
.empty-state .btn{margin-top:4px}

.tag-block{margin-top:28px}
.tag-block h2{font-size:16px;font-weight:600;color:var(--text-2);margin-bottom:12px}
.tag-list{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;
  height:30px;padding:0 14px;border-radius:999px;
  background:var(--c-050);color:var(--c-700);font-size:13px;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.tag:hover{background:var(--c-100);color:var(--c-600)}

.back-row{display:flex;align-items:center;gap:20px;margin-top:24px}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--c-500);
  text-decoration:underline;text-underline-offset:4px;
}
.text-link svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round}
.text-link:hover{color:var(--c-600)}

.related{margin-top:56px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:20px}
.section-head h2{font-size:20px;font-weight:700}
.section-head .more{font-size:14px;font-weight:600;color:var(--c-500);text-decoration:underline;text-underline-offset:4px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-sm);overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(44,103,216,.3)}
.card-media{position:relative;overflow:hidden}
.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-media .badge{position:absolute;top:12px;left:12px;background:rgba(255,255,255,.94);color:var(--c-700)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.card-body h3{font-size:17px;font-weight:600;line-height:1.45}
.card-body h3 a{color:var(--text)}
.card-body h3 a:hover{color:var(--c-500)}
.card-body p{font-size:14px;line-height:1.7;color:var(--text-2)}
.card-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3);margin-top:auto;padding-top:12px;border-top:1px solid var(--line)}

/* 侧栏 */
.article-aside{position:sticky;top:24px;display:flex;flex-direction:column;gap:24px}
.aside-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-sm);padding:20px}
.aside-card h2{font-size:15px;font-weight:700;margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.toc-list{display:flex;flex-direction:column;gap:2px;list-style:none}
.toc-list a{
  display:block;padding:8px 10px;border-radius:var(--r-xs);
  font-size:14px;color:var(--text-2);
  border-left:2px solid transparent;
}
.toc-list a:hover{background:var(--c-050);color:var(--c-600);border-left-color:var(--c-300)}
.hot-list{list-style:none;display:flex;flex-direction:column}
.hot-item{display:flex;gap:12px;align-items:center;min-height:72px;padding:10px 0;border-bottom:1px solid var(--line)}
.hot-item:last-child{border-bottom:0}
.hot-item img{width:64px;height:64px;flex:0 0 64px;border-radius:var(--r-xs);object-fit:cover}
.hot-item a{font-size:15px;font-weight:600;color:var(--text);line-height:1.5;display:block}
.hot-item a:hover{color:var(--c-500)}
.hot-item span{display:block;font-size:12px;color:var(--text-3);margin-top:4px}

/* CTA 条 */
.cta-band{
  margin-top:56px;
  background:var(--dark);border-radius:var(--r-lg);
  padding:40px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-70px;
  width:280px;height:280px;border-radius:50%;
  border:1px solid rgba(201,212,232,.28);
  pointer-events:none;
}
.cta-band h2{font-size:22px;color:#fff;font-weight:700;margin-bottom:8px}
.cta-band p{font-size:13px;color:#C3CEE4;max-width:640px}
.cta-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;position:relative;z-index:1}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:16px;font-weight:600;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--c-500);color:#fff}
.btn-primary:hover{background:var(--c-600);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-md)}
.btn-accent{background:var(--o-500);color:#fff}
.btn-accent:hover{background:var(--o-600);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-md)}
.btn-ghost{background:#fff;color:var(--c-500);border:1px solid var(--line)}
.btn-ghost:hover{background:var(--c-050);color:var(--c-600);border-color:var(--c-300)}
.btn-outline-light{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.38)}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff}
.btn:active{transform:scale(.98)}
.btn:disabled{background:#E7EBF3;color:#98A2B6;cursor:not-allowed;box-shadow:none;transform:none}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:32px;
  width:40px;height:40px;border-radius:50%;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh-md);
  display:grid;place-items:center;color:var(--c-600);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
  z-index:55;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--c-050)}
.to-top svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round}

/* Toast */
.toast{
  position:fixed;top:20px;left:50%;transform:translate(-50%,-12px);
  background:var(--c-700);color:#fff;
  padding:11px 20px;border-radius:999px;font-size:14px;
  box-shadow:var(--sh-lg);opacity:0;visibility:hidden;
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
  z-index:120;
}
.toast.is-show{opacity:1;visibility:visible;transform:translate(-50%,0)}

/* 页脚 */
.footer{background:var(--dark);color:#fff;margin-top:88px;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-logo{display:inline-flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:16px}
.footer-logo:hover{color:#fff}
.footer-logo .brand-mark{width:26px;height:26px;flex:0 0 26px}
.footer-brand p{font-size:14px;line-height:1.85;color:#B9C4DA;max-width:360px}
.footer-contact{margin-top:14px;color:#8A97AE !important;font-size:13px !important}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:12px}
.footer-col a{font-size:14px;color:#B9C4DA}
.footer-col a:hover{color:#fff;text-decoration:underline}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0}
.footer-bottom .container{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px}
.footer-bottom p{font-size:13px;color:#8A97AE}

/* ============ 响应式 ============ */
@media (max-width:1439px){
  .container{max-width:1160px}
}
@media (min-width:1024px) and (max-width:1279px){
  :root{--side:88px}
  body{padding-left:88px}
  .sidebar{width:88px;overflow:hidden}
  .sidebar .brand{justify-content:center;padding:0}
  .sidebar .brand-name{display:none}
  .sidebar .nav-item span{display:none}
  .sidebar .nav-item{justify-content:center;padding:0}
  .sidebar .nav-item.is-active::before{display:none}
  .sidebar .sidebar-foot{display:none}
  .sidebar:hover,.sidebar:focus-within{width:240px;box-shadow:var(--sh-lg);overflow-y:auto}
  .sidebar:hover .brand,.sidebar:focus-within .brand{justify-content:flex-start;padding:0 8px}
  .sidebar:hover .brand-name,.sidebar:focus-within .brand-name{display:inline}
  .sidebar:hover .nav-item span,.sidebar:focus-within .nav-item span{display:inline}
  .sidebar:hover .nav-item,.sidebar:focus-within .nav-item{justify-content:flex-start;padding:0 12px}
  .sidebar:hover .nav-item.is-active::before,.sidebar:focus-within .nav-item.is-active::before{display:block}
  .sidebar:hover .sidebar-foot,.sidebar:focus-within .sidebar-foot{display:flex}
  .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:28px}
  .card-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
}
@media (max-width:1279px){
  .article-aside{position:static}
}
@media (max-width:1023px){
  body{padding-left:0;padding-top:60px}
  .sidebar{display:none}
  .topbar{display:flex}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:28px}
  .article-head{padding:26px 22px 22px}
  .article-head h1{font-size:26px}
  .article-panel{padding:24px 20px}
  .article-body{font-size:16.5px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px;gap:20px}
  .cta-actions{width:100%;flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .article-body{font-size:16px}
  .article-body h2{font-size:20px;margin-top:34px}
  .article-body h3{font-size:17.5px}
  .article-meta{gap:12px}
  .share-group{margin-left:0;width:100%}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .footer{padding-top:48px;margin-top:64px}
  .related{margin-top:44px}
  .cta-band{margin-top:44px}
}
@media (max-width:519px){
  .article-head{padding:22px 18px 18px}
  .article-head h1{font-size:22px}
  .article-panel{padding:20px 16px;border-radius:var(--r-card)}
  .article-body{font-size:15.5px}
  .article-body table{font-size:14px}
  .article-body th,.article-body td{padding:10px 12px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .to-top{right:16px;bottom:20px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
  .card:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --bg:#F4F7FC;
  --panel:#FFFFFF;
  --sub:#EDF2FA;
  --dark:#0E1B33;
  --brand-700:#17347C;
  --brand-600:#1E46A8;
  --brand-500:#2C67D8;
  --brand-300:#7FA4E8;
  --brand-100:#DCE7FB;
  --brand-050:#EEF4FE;
  --orange-600:#E8622A;
  --orange-500:#FF7A2F;
  --orange-100:#FFE6D6;
  --teal-500:#0FA6A0;
  --teal-100:#D9F2F1;
  --text:#0E1B33;
  --text-2:#4B5A78;
  --text-3:#8A97AE;
  --line:#DFE6F2;
  --line-2:#C9D4E8;
  --ok:#17A673;
  --ok-bg:#E8F7F1;
  --err:#D9453A;
  --err-bg:#FDECEA;
  --r-sm:8px;
  --r-md:10px;
  --r-card:14px;
  --r-lg:16px;
  --shadow-sm:0 2px 8px -4px rgba(14,27,51,.12);
  --shadow-md:0 8px 24px -14px rgba(14,27,51,.20);
  --shadow-lg:0 20px 40px -22px rgba(23,52,124,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-w:240px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(44,103,216,.35);outline-offset:2px;border-radius:6px}
.skip-link{position:absolute;left:-9999px;top:0;background:#fff;color:var(--brand-700);padding:10px 16px;border-radius:0 0 var(--r-md) 0;z-index:200}
.skip-link:focus{left:0}

/* ============ 顶部移动导航 ============ */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:60px;
  background:#fff;border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;
  padding:0 16px;z-index:80;transition:box-shadow .2s var(--ease);
}
.topbar.is-scrolled{box-shadow:var(--shadow-md)}
.topbar-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;color:var(--brand-700)}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;
  background:var(--brand-050);color:var(--brand-600);flex:0 0 30px;
}
.hamburger{
  width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-md);
  background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.hamburger:hover{background:var(--brand-050);border-color:var(--brand-300)}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--brand-700)}

/* ============ 左侧竖向导航 ============ */
.side-nav{
  position:fixed;left:0;top:0;bottom:0;width:var(--nav-w);
  background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:0 14px 20px;z-index:90;
  overflow-y:auto;overflow-x:hidden;
}
.nav-brand{display:flex;align-items:center;gap:10px;height:88px;padding:0 8px;font-weight:700;font-size:16px;color:var(--brand-700)}
.nav-brand .brand-mark{background:var(--brand-050)}
.nav-list{display:flex;flex-direction:column;gap:4px;margin-top:8px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;
  min-height:44px;padding:0 12px;border-radius:var(--r-md);
  color:var(--text-2);font-size:15px;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-item svg{width:20px;height:20px;flex:0 0 20px}
.nav-item span{white-space:nowrap}
.nav-item:hover{background:var(--brand-050);color:var(--brand-600)}
.nav-item.is-active{background:var(--brand-050);color:var(--brand-700);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:-14px;top:10px;bottom:10px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand-500);
}
.nav-foot{
  margin-top:auto;padding:16px 12px 0;border-top:1px solid var(--line);
  font-size:13px;line-height:1.7;color:var(--text-3);
}
.nav-foot-title{font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:6px}
.nav-foot a{color:var(--brand-600)}
.nav-foot a:hover{text-decoration:underline}
.nav-mask{
  display:none;position:fixed;inset:0;background:rgba(14,27,51,.45);
  z-index:85;opacity:0;transition:opacity .25s var(--ease);
}
.nav-mask.is-open{opacity:1}

/* ============ 内容容器 ============ */
.content-wrap{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column}
main{flex:1}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--alt{background:var(--sub)}
.section--tight{padding:56px 0}
.section-head{max-width:820px;margin-bottom:40px}
.section-head h2{font-size:30px;line-height:1.3;margin-bottom:12px}
.section-head p{color:var(--text-2);font-size:16px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-050);border-radius:999px;padding:5px 12px;margin-bottom:14px;
}

/* ============ 面包屑 ============ */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);padding-top:28px}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand-600);text-decoration:underline}
.breadcrumb .current{color:var(--text-3)}

/* ============ 页头 ============ */
.page-hero{position:relative;background:#fff;border-bottom:1px solid var(--line);padding-bottom:72px;overflow:hidden}
.page-hero::after{
  content:"";position:absolute;right:-80px;top:-60px;width:420px;height:420px;
  border:1px solid var(--line-2);border-radius:50%;opacity:.55;pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;margin-top:28px;position:relative;z-index:1}
.hero-text h1{font-size:42px;line-height:1.22;letter-spacing:-.01em;margin:16px 0 18px;color:var(--text)}
.hero-text .lead{font-size:16.5px;color:var(--text-2);line-height:1.85;max-width:620px}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:999px;font-size:12px;font-weight:500;white-space:nowrap;
}
.badge-brand{background:var(--brand-050);color:var(--brand-700)}
.badge-orange{background:var(--orange-100);color:var(--orange-600)}
.badge-neutral{background:var(--sub);color:var(--text-2)}
.badge-teal{background:var(--teal-100);color:#0B7C77}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 28px}
.hero-tags li{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13.5px;color:var(--text-2);background:var(--sub);
  border-radius:999px;padding:6px 14px;
}
.hero-tags li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-500);flex:0 0 6px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--shadow-lg)}
.hero-media figcaption{
  position:absolute;left:16px;bottom:16px;background:rgba(255,255,255,.94);
  border-radius:12px;padding:10px 14px;font-size:13px;color:var(--text-2);box-shadow:var(--shadow-md);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--r-md);border:1px solid transparent;
  font-size:16px;font-weight:600;cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--brand-500);color:#fff}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-accent{background:var(--orange-500);color:#fff}
.btn-accent:hover{background:var(--orange-600);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-ghost{background:#fff;color:var(--brand-600);border-color:var(--line)}
.btn-ghost:hover{background:var(--brand-050);border-color:var(--brand-300)}
.btn-on-dark{background:#fff;color:var(--brand-700)}
.btn-on-dark:hover{background:var(--brand-050);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-line-dark{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.btn-line-dark:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn:active{transform:translateY(0);box-shadow:none}
.btn:disabled{background:#E7EBF3;color:#98A2B6;border-color:transparent;cursor:not-allowed;box-shadow:none;transform:none}
.btn-text{color:var(--brand-600);font-weight:600;font-size:15px;text-decoration:underline;text-underline-offset:4px}
.btn-text:hover{color:var(--brand-700)}

/* ============ 数据规格卡 ============ */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-sm);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(44,103,216,.3)}
.stat-num{font-size:30px;font-weight:700;line-height:1.2;color:var(--brand-600);font-variant-numeric:tabular-nums}
.stat-num small{font-size:15px;font-weight:600;color:var(--text-2);margin-left:4px}
.stat-label{font-size:15px;font-weight:600;margin-top:8px}
.stat-desc{font-size:14px;line-height:1.7;color:var(--text-2);margin-top:6px}

/* ============ 对比表 + 卡片混排 ============ */
.compare-layout{display:grid;grid-template-columns:2fr 1fr;gap:28px;align-items:start}
.table-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-sm);overflow:hidden}
.compare-table{width:100%;border-collapse:collapse;font-size:15px}
.compare-table caption{text-align:left;padding:20px 20px 0;font-size:13px;color:var(--text-3)}
.compare-table th,.compare-table td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.compare-table thead th{background:var(--sub);font-size:14px;font-weight:600;color:var(--brand-700);white-space:nowrap}
.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table tbody tr{transition:background .2s var(--ease)}
.compare-table tbody tr:hover{background:var(--brand-050)}
.compare-table td.row-head{font-weight:600;color:var(--text);white-space:nowrap}
.compare-table td.pro{color:var(--brand-700);font-weight:600;background:rgba(238,244,254,.7)}
.compare-note{font-size:13px;color:var(--text-3);margin-top:12px}
.compare-cards{display:flex;flex-direction:column;gap:16px}
.mini-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--shadow-sm);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.mini-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(44,103,216,.3)}
.mini-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:12px;margin-bottom:14px}
.mini-card h3{font-size:17px;line-height:1.45;margin-bottom:8px}
.mini-card p{font-size:14px;line-height:1.7;color:var(--text-2)}

/* ============ 适用场景 ============ */
.scenario-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.scenario{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;box-shadow:var(--shadow-sm);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.scenario:nth-child(even){margin-top:34px}
.scenario:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(44,103,216,.3)}
.scenario h3{font-size:19px;line-height:1.45;margin:14px 0 10px}
.scenario p{font-size:15px;color:var(--text-2);line-height:1.8}
.scenario ul{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.scenario li{position:relative;padding-left:18px;font-size:14.5px;color:var(--text-2)}
.scenario li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;
  border-radius:2px;background:var(--brand-500);
}

/* ============ 流程 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--shadow-sm);position:relative;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:12px;background:var(--brand-050);
  color:var(--brand-600);font-weight:700;font-size:15px;
}
.step h3{font-size:17px;margin:14px 0 8px}
.step p{font-size:14.5px;color:var(--text-2);line-height:1.75}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;align-items:start}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow-sm);overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item:hover{border-color:var(--brand-300)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 18px;font-size:15px;font-weight:600;
  cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;line-height:1;color:var(--brand-500);flex:0 0 auto}
.faq-item[open] summary::after{content:"−"}
.faq-item[open]{border-color:rgba(44,103,216,.3);box-shadow:var(--shadow-md)}
.faq-body{padding:0 18px 18px;font-size:15px;line-height:1.8;color:var(--text-2)}

/* ============ CTA 条 ============ */
.cta-band{
  background:var(--dark);border-radius:var(--r-lg);padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-70px;bottom:-110px;width:320px;height:320px;
  border:1px solid rgba(201,212,232,.28);border-radius:50%;pointer-events:none;
}
.cta-text h2{font-size:26px;line-height:1.35;color:#fff}
.cta-text p{font-size:13.5px;color:#C3CEE4;margin-top:8px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}

/* ============ 相关分类胶囊 ============ */
.pill-links{display:flex;flex-wrap:wrap;gap:12px}
.pill{
  display:inline-flex;align-items:center;min-height:44px;padding:0 20px;
  border-radius:999px;background:#fff;border:1px solid var(--line);
  font-size:14.5px;color:var(--text-2);box-shadow:var(--shadow-sm);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.pill:hover{background:var(--brand-050);color:var(--brand-700);border-color:var(--brand-300);transform:translateY(-2px)}
.pill.is-current{background:var(--brand-500);border-color:var(--brand-500);color:#fff}

/* ============ 页脚 ============ */
.footer{background:var(--dark);color:#B9C4DA;margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding-top:64px;padding-bottom:48px;
}
.footer-brand p{font-size:14px;line-height:1.8;margin-top:14px;max-width:360px}
.footer-logo{display:inline-flex;align-items:center;gap:10px;font-size:16px;font-weight:700;color:#fff}
.footer-logo .brand-mark{background:rgba(255,255,255,.1);color:#fff}
.footer-contact{color:#8A97AE;font-size:13px;margin-top:14px}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:#B9C4DA;transition:color .2s var(--ease)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0}
.footer-bottom .container{display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between}
.footer-bottom p{font-size:13px;color:#8A97AE}

/* ============ 响应式 ============ */
@media (min-width:1440px){
  .container{max-width:1240px}
}
@media (min-width:1280px) and (max-width:1439px){
  .container{max-width:1160px}
  .stat-grid,.steps{gap:20px}
}
@media (min-width:1024px) and (max-width:1279px){
  :root{--nav-w:88px}
  .side-nav{padding-left:10px;padding-right:10px;transition:width .24s var(--ease),padding .24s var(--ease),box-shadow .24s var(--ease)}
  .side-nav:hover,.side-nav:focus-within{width:240px;padding-left:14px;padding-right:14px;box-shadow:var(--shadow-lg)}
  .side-nav .nav-item span,.side-nav .nav-brand span,.side-nav .nav-foot{
    opacity:0;pointer-events:none;transition:opacity .18s var(--ease);
  }
  .side-nav:hover .nav-item span,.side-nav:hover .nav-brand span,.side-nav:hover .nav-foot,
  .side-nav:focus-within .nav-item span,.side-nav:focus-within .nav-brand span,.side-nav:focus-within .nav-foot{
    opacity:1;pointer-events:auto;
  }
  .nav-item.is-active::before{left:-10px}
  .compare-layout{grid-template-columns:1fr}
  .compare-cards{flex-direction:row;flex-wrap:wrap}
  .compare-cards .mini-card{flex:1 1 240px}
  .stat-grid{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .faq-grid{grid-template-columns:1fr}
  .hero-text h1{font-size:36px}
  .hero-grid{gap:32px}
}
@media (max-width:1023px){
  .topbar{display:flex}
  .side-nav{
    width:280px;max-width:84vw;transform:translateX(-100%);
    transition:transform .28s var(--ease);box-shadow:var(--shadow-lg);
  }
  .side-nav.is-open{transform:translateX(0)}
  .nav-mask{display:block;pointer-events:none}
  .nav-mask.is-open{pointer-events:auto}
  .content-wrap{margin-left:0;padding-top:60px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-text h1{font-size:32px}
  .hero-media img{aspect-ratio:16/10}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .faq-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:64px 0}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:48px 0}
  .section--tight{padding:40px 0}
  .hero-text h1{font-size:28px}
  .section-head h2,.cta-text h2{font-size:23px}
  .stat-grid,.steps{grid-template-columns:1fr;gap:16px}
  .scenario-grid{grid-template-columns:1fr}
  .scenario:nth-child(even){margin-top:0}
  .hero-actions .btn,.cta-actions .btn{width:100%}
  .cta-actions{width:100%;flex-direction:column}
  .footer-grid{grid-template-columns:1fr;padding-top:48px;padding-bottom:32px}
  .footer-brand p{max-width:none}
  .footer-bottom .container{flex-direction:column;justify-content:flex-start}
  .page-hero{padding-bottom:48px}
  .page-hero::after{display:none}
  .hero-media figcaption{position:static;margin-top:12px;box-shadow:none;background:var(--sub)}

  /* 表格转卡片式键值对 */
  .table-wrap{background:transparent;border:0;box-shadow:none;overflow:visible}
  .compare-table{display:block}
  .compare-table caption{padding:0 0 12px}
  .compare-table thead{display:none}
  .compare-table tbody{display:block}
  .compare-table tr{
    display:block;background:#fff;border:1px solid var(--line);
    border-radius:var(--r-card);box-shadow:var(--shadow-sm);
    padding:14px 16px 10px;margin-bottom:14px;
  }
  .compare-table td{
    display:block;border:0;padding:8px 0 8px 104px;position:relative;
    font-size:14.5px;white-space:normal;
  }
  .compare-table td::before{
    content:attr(data-label);position:absolute;left:0;top:8px;width:96px;
    font-size:13px;font-weight:600;color:var(--text-3);
  }
  .compare-table td.row-head{
    padding-left:0;padding-bottom:12px;margin-bottom:6px;
    font-size:16px;color:var(--brand-700);
    border-bottom:1px solid var(--line);
  }
  .compare-table td.row-head::before{display:none}
  .compare-table td.pro{background:transparent}
  .compare-cards{flex-direction:column}
}
@media (max-width:520px){
  body{font-size:15.5px}
  .hero-text h1{font-size:26px}
  .badge{font-size:11.5px}
  .compare-table td{padding-left:0;padding-top:4px}
  .compare-table td::before{position:static;display:block;width:auto;margin-bottom:2px}
  .compare-table td.row-head{padding-top:0}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}

/* roulang page: category3 */
/* ===== 设计令牌 ===== */
:root{
  --bg:#F4F7FC;
  --panel:#FFFFFF;
  --panel-2:#EDF2FA;
  --dark:#0E1B33;

  --c700:#17347C;
  --c600:#1E46A8;
  --c500:#2C67D8;
  --c300:#7FA4E8;
  --c100:#DCE7FB;
  --c050:#EEF4FE;

  --o600:#E8622A;
  --o500:#FF7A2F;
  --o100:#FFE6D6;

  --t500:#0FA6A0;
  --t100:#D9F2F1;

  --text:#0E1B33;
  --text-2:#4B5A78;
  --text-3:#8A97AE;
  --text-inv:#FFFFFF;
  --text-inv2:#C3CEE4;

  --line:#DFE6F2;
  --line-2:#C9D4E8;

  --ok:#17A673;
  --ok-bg:#E8F7F1;
  --warn:#E0A22E;
  --warn-bg:#FDF3E2;
  --err:#D9453A;
  --err-bg:#FDECEA;

  --sh-sm:0 2px 8px -4px rgba(14,27,51,.12);
  --sh-md:0 8px 24px -14px rgba(14,27,51,.20);
  --sh-lg:0 20px 40px -22px rgba(23,52,124,.28);

  --r-xs:8px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:16px;
  --r-pill:999px;

  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar:240px;
}

/* ===== 基础重置 ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p,figure,blockquote{margin:0;}
h1,h2,h3,h4{font-weight:700;line-height:1.3;letter-spacing:-.01em;}
:focus-visible{outline:3px solid rgba(44,103,216,.45);outline-offset:2px;border-radius:8px;}
.skip-link{
  position:absolute;left:16px;top:-60px;z-index:200;
  background:var(--c700);color:#fff;padding:10px 16px;border-radius:var(--r-sm);
  font-size:14px;transition:top .2s var(--ease);
}
.skip-link:focus{top:12px;}

/* ===== 容器与布局 ===== */
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.app{margin-left:var(--sidebar);min-height:100vh;display:flex;flex-direction:column;}
main{flex:1;}

/* ===== 左侧固定导航 ===== */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar);
  background:var(--panel);border-right:1px solid var(--line);
  display:flex;flex-direction:column;z-index:60;
}
.brand{
  display:flex;align-items:center;gap:10px;
  height:88px;flex:none;padding:0 20px;
  font-size:16px;font-weight:700;color:var(--c700);
  border-bottom:1px solid var(--line);
}
.brand-mark{
  width:32px;height:32px;flex:none;border-radius:10px;
  background:var(--c600);color:#fff;
  display:flex;align-items:center;justify-content:center;
}
.brand-text{font-size:16px;font-weight:700;line-height:1.2;}
.side-nav{
  flex:1;overflow-y:auto;
  display:flex;flex-direction:column;gap:4px;padding:16px 12px;
}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:12px;
  min-height:44px;padding:0 12px;border-radius:var(--r-sm);
  color:var(--text-2);font-size:15px;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-item svg{width:20px;height:20px;flex:none;}
.nav-item:hover{background:var(--c050);color:var(--c500);}
.nav-item.is-active{background:var(--c050);color:var(--c700);font-weight:600;}
.nav-item.is-active::before{
  content:"";position:absolute;left:-12px;top:8px;bottom:8px;width:3px;
  border-radius:0 3px 3px 0;background:var(--c500);
}
.side-foot{
  flex:none;border-top:1px solid var(--line);padding:16px 20px 20px;
  font-size:13px;color:var(--text-3);line-height:1.7;
}
.side-foot a{color:var(--c600);font-weight:600;display:inline-block;margin-top:6px;}
.side-foot a:hover{text-decoration:underline;text-underline-offset:3px;}

/* ===== 移动端顶部栏 ===== */
.mobile-top{
  display:none;
  position:fixed;top:0;left:0;right:0;height:60px;z-index:70;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(150%) blur(6px);
  border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;
  padding:0 14px;
  transition:box-shadow .2s var(--ease);
}
.mobile-top.is-scrolled{box-shadow:var(--sh-md);border-bottom-color:transparent;}
.mobile-brand{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700;color:var(--c700);}
.mobile-brand .brand-mark{width:28px;height:28px;border-radius:9px;font-size:12px;}
.hamburger{
  width:44px;height:44px;border-radius:var(--r-sm);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:background .2s var(--ease);
}
.hamburger span{display:block;width:20px;height:2px;border-radius:2px;background:var(--text);transition:transform .2s var(--ease),opacity .2s var(--ease);}
.hamburger:hover{background:var(--c050);}
.hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.is-open span:nth-child(2){opacity:0;}
.hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ===== 抽屉 ===== */
.drawer-mask{
  position:fixed;inset:0;z-index:80;background:rgba(14,27,51,.45);
  opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:90;
  width:280px;max-width:84vw;background:#fff;
  display:flex;flex-direction:column;
  transform:translateX(102%);
  transition:transform .3s var(--ease);
  box-shadow:var(--sh-lg);
}
.drawer.is-open{transform:none;}
.drawer-head{
  height:60px;flex:none;display:flex;align-items:center;justify-content:space-between;
  padding:0 16px 0 20px;border-bottom:1px solid var(--line);
  font-size:15px;font-weight:700;color:var(--c700);
}
.drawer-close{
  width:40px;height:40px;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;
  color:var(--text-2);font-size:20px;line-height:1;
}
.drawer-close:hover{background:var(--c050);color:var(--c600);}
.drawer .nav-item{min-height:48px;border-radius:var(--r-sm);}
.drawer-nav{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:4px;}
.drawer-foot{flex:none;padding:16px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;}

/* ===== 通用按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:16px;font-weight:600;line-height:1;white-space:nowrap;
  transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{background:var(--c500);color:#fff;box-shadow:var(--sh-sm);}
.btn-primary:hover{background:var(--c600);transform:translateY(-2px);box-shadow:var(--sh-md);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-sm);}
.btn-secondary{background:#fff;border:1px solid var(--line);color:var(--c600);}
.btn-secondary:hover{background:var(--c050);border-color:var(--c300);color:var(--c700);}
.btn-secondary:active{transform:scale(.98);}
.btn-accent{background:var(--o500);color:#fff;box-shadow:var(--sh-sm);}
.btn-accent:hover{background:var(--o600);transform:translateY(-2px);box-shadow:var(--sh-md);}
.btn-accent:active{transform:translateY(0);box-shadow:var(--sh-sm);}
.btn-ghost-inv{background:transparent;border:1px solid rgba(255,255,255,.35);color:#fff;}
.btn-ghost-inv:hover{background:rgba(255,255,255,.12);border-color:#fff;}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--c500);font-weight:600;font-size:15px;
  text-decoration:underline;text-underline-offset:4px;
}
.btn-link:hover{color:var(--c700);}
.btn:disabled,.btn[disabled]{background:#E7EBF3;color:#98A2B6;cursor:not-allowed;box-shadow:none;transform:none;}

/* ===== 标签 / 徽章 ===== */
.chip{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;font-weight:500;line-height:1;
  background:var(--panel-2);color:var(--text-2);white-space:nowrap;
}
.chip-blue{background:var(--c050);color:var(--c700);}
.chip-orange{background:var(--o100);color:var(--o600);}
.chip-cool{background:var(--t100);color:#0B7F7A;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--c050);color:var(--c700);
  font-size:13px;font-weight:600;letter-spacing:.02em;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c500);}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--c500);text-decoration:underline;text-underline-offset:3px;}
.breadcrumb .sep{color:var(--line-2);}
.breadcrumb .current{color:var(--text-3);}

/* ===== 页头 ===== */
.page-head{
  background:var(--c050);
  border-bottom:1px solid var(--line);
  padding:40px 0 64px;
  position:relative;
  overflow:hidden;
}
.page-head::after{
  content:"";position:absolute;right:-120px;top:-140px;
  width:420px;height:420px;border-radius:50%;
  border:1px solid var(--line-2);opacity:.9;pointer-events:none;
}
.page-head-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
  margin-top:28px;
}
.page-head h1{
  font-size:clamp(28px,3.2vw,42px);
  line-height:1.22;letter-spacing:-.01em;
  margin:16px 0 0;
}
.page-head .lead{
  font-size:16px;line-height:1.9;color:var(--text-2);
  max-width:620px;margin-top:16px;
}
.page-head-media{
  margin:0;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-lg);aspect-ratio:3/2;background:var(--panel-2);
}
.page-head-media img{width:100%;height:100%;object-fit:cover;}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.trust-row{
  display:flex;flex-wrap:wrap;gap:12px 20px;margin-top:24px;
  font-size:13px;color:var(--text-2);
}
.trust-row span{display:inline-flex;align-items:center;gap:6px;}
.trust-row span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--c300);}

/* ===== 板块通用 ===== */
.section{padding:88px 0;}
.section-alt{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head h2{
  font-size:clamp(23px,2.4vw,30px);line-height:1.3;
}
.section-head .section-sub{
  margin-top:14px;font-size:16px;color:var(--text-2);line-height:1.8;
}
.section-head--row{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;max-width:none;
}

/* ===== 流程时间轴 ===== */
.timeline{
  position:relative;
  display:grid;grid-template-columns:repeat(6,1fr);gap:24px;
}
.timeline::before{
  content:"";position:absolute;left:20px;right:20px;top:20px;height:1px;
  background:var(--line-2);
}
.tl-item{position:relative;padding-top:60px;}
.tl-node{
  position:absolute;top:0;left:0;
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--c500);background:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:600;color:var(--c600);letter-spacing:.02em;
  z-index:1;
}
.tl-item h3{font-size:18px;line-height:1.45;font-weight:600;}
.tl-item p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--text-2);}

/* ===== 功能行列表 ===== */
.feature-list{border-top:1px solid var(--line);}
.feature-row{
  display:grid;grid-template-columns:64px 1fr auto;
  gap:20px;align-items:center;
  padding:24px 0;border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.feature-row:hover{background:rgba(238,244,254,.55);}
.feature-thumb{
  width:64px;height:64px;border-radius:var(--r-xs);object-fit:cover;
  background:var(--panel-2);
}
.feature-body h3{font-size:18px;font-weight:600;line-height:1.5;}
.feature-body p{margin-top:8px;font-size:15px;color:var(--text-2);line-height:1.8;max-width:760px;}
.feature-row .chip{justify-self:end;}

/* ===== 覆盖项目与数据 ===== */
.coverage-grid{
  display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:start;
}
.coverage-text h2{font-size:clamp(23px,2.4vw,30px);line-height:1.3;margin-top:16px;}
.coverage-text p{margin-top:16px;font-size:16px;color:var(--text-2);line-height:1.85;max-width:640px;}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag-cloud .chip{height:32px;padding:0 16px;font-size:13px;background:var(--panel-2);color:var(--text-2);transition:background .2s var(--ease),color .2s var(--ease);}
.tag-cloud .chip:hover{background:var(--c050);color:var(--c700);}
.stat-list{
  display:grid;gap:12px;
}
.stat-list li{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px 22px;box-shadow:var(--sh-sm);
  display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.stat-list li:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(44,103,216,.3);}
.stat-list strong{
  font-size:26px;font-weight:700;color:var(--c700);letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
}
.stat-list span{font-size:14px;color:var(--text-2);}

/* ===== FAQ ===== */
.faq-grid{display:grid;grid-template-columns:1fr;gap:12px;align-items:start;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--sh-sm);overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item:hover{border-color:var(--line-2);}
.faq-item.is-open{border-color:rgba(44,103,216,.35);box-shadow:var(--sh-md);}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:14px 20px;text-align:left;
  font-size:15px;font-weight:600;color:var(--text);
}
.faq-q:hover{color:var(--c600);}
.faq-icon{
  width:20px;height:20px;flex:none;color:var(--c500);
  transition:transform .25s var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease);}
.faq-item.is-open .faq-a{max-height:360px;}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--text-2);}

/* ===== 相关分类 ===== */
.related{padding:56px 0 8px;}
.related h2{font-size:18px;font-weight:600;margin-bottom:18px;}
.related-list{display:flex;flex-wrap:wrap;gap:10px;}
.related-list a{
  display:inline-flex;align-items:center;height:36px;padding:0 18px;
  border-radius:var(--r-pill);border:1px solid var(--line);
  background:#fff;color:var(--text-2);font-size:14px;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.related-list a:hover{background:var(--c050);color:var(--c700);border-color:var(--c300);transform:translateY(-2px);}
.related-list a[aria-current="page"]{background:var(--c500);border-color:var(--c500);color:#fff;font-weight:600;}

/* ===== CTA 条 ===== */
.cta-band{padding:24px 0 88px;}
.cta-inner{
  background:var(--dark);
  border-radius:var(--r-lg);
  padding:40px 44px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:28px;position:relative;overflow:hidden;
}
.cta-inner::after{
  content:"";position:absolute;right:-60px;bottom:-120px;
  width:320px;height:320px;border-radius:50%;
  border:1px solid rgba(201,212,232,.22);
}
.cta-text{position:relative;z-index:1;}
.cta-text h2{font-size:clamp(19px,1.9vw,22px);color:#fff;line-height:1.45;}
.cta-text p{margin-top:10px;font-size:13px;color:var(--text-inv2);line-height:1.7;}
.cta-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:12px;}

/* ===== 页脚 ===== */
.footer{background:var(--dark);color:var(--text-inv2);}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding-top:64px;padding-bottom:48px;
}
.footer-logo{
  display:inline-flex;align-items:center;gap:10px;
  color:#fff;font-size:16px;font-weight:700;
}
.footer-brand p{
  margin-top:16px;font-size:14px;line-height:1.8;color:#B9C4DA;max-width:380px;
}
.footer-contact{margin-top:14px;font-size:13px;color:#8A97AE;line-height:1.9;}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col li{margin-bottom:12px;}
.footer-col a{font-size:14px;color:#B9C4DA;}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{border-top:1px solid rgba(195,206,228,.16);padding:20px 0;}
.footer-bottom .container{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;
}
.footer-bottom p{font-size:13px;color:#8A97AE;line-height:1.7;}

/* ===== 响应式 ===== */
@media (max-width:1439px){
  .container{max-width:1160px;}
  .timeline{gap:18px;}
}
@media (max-width:1279px){
  :root{--sidebar:88px;}
  .brand{padding:0;justify-content:center;height:88px;}
  .brand-text{display:none;}
  .side-nav{padding:16px 12px;}
  .nav-item{justify-content:center;padding:0;}
  .nav-item span{display:none;}
  .nav-item.is-active::before{left:-12px;}
  .side-foot{display:none;}
  .nav-hover-label{display:none;}
  .timeline{grid-template-columns:repeat(3,1fr);gap:32px 24px;}
  .timeline::before{display:none;}
  .coverage-grid{grid-template-columns:1fr;gap:40px;}
}
@media (max-width:1023px){
  .app{margin-left:0;padding-top:60px;}
  .sidebar{display:none;}
  .mobile-top{display:flex;}
  .section{padding:64px 0;}
  .page-head{padding:28px 0 48px;}
  .page-head-grid{grid-template-columns:1fr;gap:32px;}
  .page-head-media{aspect-ratio:16/9;}
  .timeline{grid-template-columns:1fr;gap:0;}
  .timeline::before{
    display:block;left:20px;right:auto;top:20px;bottom:24px;
    width:1px;height:auto;
  }
  .tl-item{padding:0 0 28px 64px;}
  .tl-item:last-child{padding-bottom:0;}
  .tl-node{top:0;left:0;}
  .cta-band{padding:16px 0 64px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding-top:48px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .section{padding:48px 0;}
  .page-head h1{font-size:28px;}
  .feature-row{grid-template-columns:56px 1fr;gap:16px;}
  .feature-thumb{width:56px;height:56px;}
  .feature-row .chip{grid-column:2;justify-self:start;}
  .cta-inner{padding:28px 24px;flex-direction:column;align-items:stretch;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .cta-row{flex-direction:column;}
  .cta-row .btn{width:100%;}
  .faq-grid{grid-template-columns:1fr;}
  .stat-list li{padding:16px 18px;}
}
@media (max-width:479px){
  body{font-size:15.5px;}
  .page-head h1{font-size:26px;}
  .section-head h2{font-size:22px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom .container{flex-direction:column;align-items:flex-start;}
  .related-list a{width:100%;justify-content:center;}
}
@media (min-width:1280px){
  .faq-grid{grid-template-columns:1fr 1fr;gap:12px 20px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
  }
}

/* roulang page: category4 */
:root{
  --blue-700:#17347C; --blue-600:#1E46A8; --blue-500:#2C67D8; --blue-300:#7FA4E8;
  --blue-100:#DCE7FB; --blue-050:#EEF4FE;
  --orange-600:#E8622A; --orange-500:#FF7A2F; --orange-100:#FFE6D6;
  --cyan-500:#0FA6A0; --cyan-100:#D9F2F1;
  --ink:#0E1B33; --ink-2:#4B5A78; --ink-3:#8A97AE;
  --line:#DFE6F2; --line-2:#C9D4E8;
  --bg:#F4F7FC; --panel:#FFFFFF; --muted:#EDF2FA; --dark:#0E1B33;
  --ok:#17A673; --ok-bg:#E8F7F1; --warn:#E0A22E; --warn-bg:#FDF3E2;
  --err:#D9453A; --err-bg:#FDECEA;
  --r-sm:8px; --r-md:10px; --r-lg:14px; --r-xl:16px;
  --sh-sm:0 2px 8px -4px rgba(14,27,51,.12);
  --sh-md:0 8px 24px -14px rgba(14,27,51,.20);
  --sh-lg:0 20px 40px -22px rgba(23,52,124,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-w:240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0; padding:0;
  background:var(--bg); color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px; line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%; display:block;}
a{color:var(--blue-500); text-decoration:none;}
a:hover{text-decoration:underline;}
button{font:inherit; color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:0; list-style:none;}
:focus-visible{outline:3px solid rgba(44,103,216,.35); outline-offset:2px; border-radius:6px;}
.container{width:min(1240px,100% - 64px); margin-inline:auto;}

/* ============ 左侧导航 ============ */
.side-nav{
  position:fixed; top:0; left:0; bottom:0; width:var(--nav-w);
  background:#fff; border-right:1px solid var(--line);
  display:flex; flex-direction:column; overflow-y:auto; z-index:60;
  transition:width .24s var(--ease);
}
.brand{
  display:flex; align-items:center; gap:10px;
  height:88px; padding:0 20px; flex:0 0 auto;
  border-bottom:1px solid var(--line);
  color:var(--ink); text-decoration:none;
}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:32px; height:32px; flex:0 0 32px; border-radius:50%;
  display:grid; place-items:center;
  background:var(--blue-050); color:var(--blue-600);
  border:1px solid var(--blue-100);
}
.brand-text{font-size:16px; font-weight:700; letter-spacing:.01em; line-height:1.25;}
.side-nav .nav-list{padding:16px 12px; display:flex; flex-direction:column; gap:4px;}
.nav-item{
  position:relative; display:flex; align-items:center; gap:12px;
  min-height:44px; padding:0 12px; border-radius:var(--r-md);
  color:var(--ink-2); font-size:15px; font-weight:500; text-decoration:none;
  transition:background .2s var(--ease), color .2s var(--ease);
  white-space:nowrap;
}
.nav-item svg{width:20px; height:20px; flex:0 0 20px;}
.nav-item:hover{background:var(--blue-050); color:var(--blue-600); text-decoration:none;}
.nav-item.is-active{background:var(--blue-050); color:var(--blue-700); font-weight:600;}
.nav-item.is-active::before{
  content:""; position:absolute; left:0; top:9px; bottom:9px; width:3px;
  border-radius:3px; background:var(--blue-500);
}
.side-foot{
  margin-top:auto; padding:16px 20px 22px; border-top:1px solid var(--line);
  font-size:13px; line-height:1.7; color:var(--ink-3);
}
.side-foot a{color:var(--ink-2); display:block; padding:6px 0;}
.side-foot a:hover{color:var(--blue-600); text-decoration:none;}

/* ============ 移动端顶栏与抽屉 ============ */
.topbar{
  display:none; position:sticky; top:0; z-index:70;
  height:60px; align-items:center; justify-content:space-between;
  padding:0 16px; background:#fff; border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.topbar.is-scrolled{box-shadow:var(--sh-md);}
.topbar .brand{height:60px; padding:0; border:0;}
.burger{
  width:44px; height:44px; display:grid; place-items:center;
  background:#fff; border:1px solid var(--line); border-radius:var(--r-md);
  cursor:pointer; color:var(--ink);
}
.burger:hover{background:var(--blue-050);}
.drawer-close{
  display:none; width:44px; height:44px; align-items:center; justify-content:center;
  background:#fff; border:1px solid var(--line); border-radius:var(--r-md);
  cursor:pointer; margin:14px 16px 0 auto; color:var(--ink);
}
.drawer-mask{
  position:fixed; inset:0; background:rgba(14,27,51,.45);
  opacity:0; visibility:hidden; transition:opacity .28s var(--ease), visibility .28s;
  z-index:65;
}

.main{margin-left:var(--nav-w);}

/* ============ 页面头部 ============ */
.page-head{
  background:var(--blue-050);
  border-bottom:1px solid var(--line);
  padding:56px 0 64px;
  position:relative; overflow:hidden;
}
.page-head::after{
  content:""; position:absolute; right:-80px; top:-60px; width:420px; height:420px;
  border:1px solid var(--line-2); border-radius:50%; opacity:.55; pointer-events:none;
}
.head-grid{display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center; position:relative;}
.breadcrumb{font-size:13px; color:var(--ink-3); margin-bottom:18px;}
.breadcrumb a{color:var(--ink-3);}
.breadcrumb a:hover{color:var(--blue-600);}
.breadcrumb .sep{margin:0 8px; color:var(--line-2);}
.breadcrumb .current{color:var(--ink-2);}
h1{
  font-size:42px; line-height:1.22; font-weight:700; letter-spacing:-.01em;
  color:var(--blue-700); margin-bottom:20px;
}
.lead{font-size:16px; line-height:1.85; color:var(--ink-2); max-width:600px;}
.head-chips{display:flex; flex-wrap:wrap; gap:10px; margin-top:26px;}
.chip{
  display:inline-flex; align-items:center; gap:6px; height:28px; padding:0 12px;
  border-radius:999px; font-size:12px; font-weight:500;
  background:#fff; color:var(--blue-700); border:1px solid var(--blue-100);
}
.head-media{position:relative;}
.head-media img{
  width:100%; aspect-ratio:3/2; object-fit:cover;
  border-radius:var(--r-xl); box-shadow:var(--sh-lg);
}
.head-float{
  position:absolute; right:-18px; bottom:-24px; width:228px;
  background:#fff; border:1px solid var(--line); border-radius:var(--r-lg);
  box-shadow:var(--sh-md); padding:16px 18px;
}
.head-float strong{display:block; font-size:22px; color:var(--blue-700); line-height:1.2;}
.head-float span{font-size:13px; color:var(--ink-3);}

/* ============ 通用板块 ============ */
section{padding:88px 0;}
.section-head{display:flex; align-items:flex-end; justify-content:space-between; gap:24px; margin-bottom:36px;}
h2{font-size:30px; line-height:1.3; font-weight:700; color:var(--ink);}
.section-head p{margin-top:10px; font-size:15px; color:var(--ink-2); max-width:640px;}
.link-more{font-size:15px; font-weight:600; color:var(--blue-500); text-decoration:underline; text-underline-offset:4px; white-space:nowrap;}
.link-more:hover{color:var(--blue-700);}

/* ============ 双列大图卡 ============ */
.card-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:28px;}
.big-card{
  background:var(--panel); border:1px solid var(--line); border-radius:var(--r-lg);
  box-shadow:var(--sh-sm); overflow:hidden; display:flex; flex-direction:column;
  min-height:380px; transition:transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease);
}
.big-card:hover{transform:translateY(-4px); box-shadow:var(--sh-md); border-color:rgba(44,103,216,.3);}
.big-card figure{position:relative; margin:0; overflow:hidden;}
.big-card figure img{
  width:100%; height:216px; object-fit:cover;
  transition:transform .3s var(--ease);
}
.big-card:hover figure img{transform:scale(1.03);}
.badge{
  position:absolute; left:16px; top:16px;
  display:inline-flex; align-items:center; height:26px; padding:0 12px;
  border-radius:999px; font-size:12px; font-weight:500;
  background:var(--blue-050); color:var(--blue-700);
}
.badge.orange{background:var(--orange-100); color:var(--orange-600);}
.badge.cyan{background:var(--cyan-100); color:var(--cyan-500);}
.badge.neutral{background:var(--muted); color:var(--ink-2);}
.big-card .body{padding:22px 24px 24px; display:flex; flex-direction:column; gap:10px; flex:1;}
.big-card h3{font-size:19px; line-height:1.45; font-weight:600; color:var(--ink);}
.big-card p{font-size:14.5px; line-height:1.75; color:var(--ink-2);}
.tag-row{display:flex; flex-wrap:wrap; gap:8px; margin-top:auto; padding-top:8px;}
.tag{
  display:inline-flex; align-items:center; height:26px; padding:0 10px;
  border-radius:999px; font-size:12px; font-weight:500;
  background:var(--muted); color:var(--ink-2);
}
.tag.cyan{background:var(--cyan-100); color:var(--cyan-500);}

/* ============ 数据模块能力 ============ */
.capability{background:#fff; border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.cap-list{display:grid; gap:16px;}
.cap-item{
  display:grid; grid-template-columns:56px 1fr; gap:20px; align-items:start;
  padding:22px 24px; background:var(--bg); border:1px solid var(--line);
  border-radius:var(--r-lg);
}
.cap-icon{
  width:56px; height:56px; border-radius:var(--r-md); display:grid; place-items:center;
  background:#fff; border:1px solid var(--blue-100); color:var(--blue-600);
}
.cap-icon svg{width:24px; height:24px;}
.cap-item h3{font-size:18px; font-weight:600; margin-bottom:6px;}
.cap-item p{font-size:15px; color:var(--ink-2); max-width:900px;}

/* ============ 流程轴 ============ */
.flow{display:grid; grid-template-columns:repeat(4,1fr); gap:24px; position:relative;}
.flow::before{
  content:""; position:absolute; left:28px; right:28px; top:20px; height:1px; background:var(--line-2);
}
.flow-step{position:relative; padding-top:0;}
.flow-node{
  width:40px; height:40px; border-radius:50%; background:#fff;
  border:1px solid var(--blue-300); color:var(--blue-600);
  display:grid; place-items:center; font-size:15px; font-weight:600;
  position:relative; z-index:1; margin-bottom:18px;
}
.flow-step h3{font-size:17px; font-weight:600; margin-bottom:6px;}
.flow-step p{font-size:14px; color:var(--ink-2);}

/* ============ FAQ ============ */
.faq-list{display:grid; gap:12px; max-width:900px;}
.faq-item{background:#fff; border:1px solid var(--line); border-radius:12px; overflow:hidden;}
.faq-q{
  width:100%; min-height:56px; display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:12px 20px; background:transparent; border:0; cursor:pointer; text-align:left;
  font-size:15px; font-weight:600; color:var(--ink);
}
.faq-q:hover{background:var(--blue-050);}
.faq-icon{
  width:20px; height:20px; flex:0 0 20px; position:relative; color:var(--blue-500);
  transition:transform .22s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:""; position:absolute; background:currentColor; border-radius:2px;
}
.faq-icon::before{left:3px; right:3px; top:9px; height:2px;}
.faq-icon::after{top:3px; bottom:3px; left:9px; width:2px; transition:opacity .22s var(--ease);}
.faq-item.is-open .faq-icon{transform:rotate(180deg);}
.faq-item.is-open .faq-icon::after{opacity:0;}
.faq-a{padding:0 20px 20px; font-size:15px; line-height:1.8; color:var(--ink-2);}
.faq-a[hidden]{display:none;}

/* ============ CTA 条 ============ */
.cta-wrap{padding:0 0 88px;}
.cta{
  background:var(--dark); border-radius:var(--r-xl);
  padding:40px 44px; display:flex; align-items:center; justify-content:space-between; gap:32px;
  position:relative; overflow:hidden;
}
.cta::after{
  content:""; position:absolute; right:-60px; top:-90px; width:300px; height:300px;
  border:1px solid rgba(201,212,232,.35); border-radius:50%; pointer-events:none;
}
.cta h2{color:#fff; font-size:24px; line-height:1.35;}
.cta p{color:#C3CEE4; font-size:13.5px; margin-top:8px;}
.cta-actions{display:flex; gap:12px; flex-wrap:wrap; position:relative; z-index:1;}
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  height:46px; padding:0 24px; border-radius:var(--r-md); border:1px solid transparent;
  font-size:16px; font-weight:600; cursor:pointer; text-decoration:none;
  transition:transform .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease), color .2s var(--ease);
}
.btn:hover{text-decoration:none; transform:translateY(-2px);}
.btn:active{transform:translateY(0); box-shadow:none;}
.btn-primary{background:var(--blue-500); color:#fff;}
.btn-primary:hover{background:var(--blue-600); box-shadow:var(--sh-md);}
.btn-accent{background:var(--orange-500); color:#fff;}
.btn-accent:hover{background:var(--orange-600); box-shadow:var(--sh-md);}
.btn-ghost{background:#fff; color:var(--blue-500); border-color:var(--line);}
.btn-ghost:hover{background:var(--blue-050);}
.btn-on-dark{background:transparent; color:#fff; border-color:rgba(255,255,255,.35);}
.btn-on-dark:hover{background:rgba(255,255,255,.12);}

/* ============ 相关分类 ============ */
.related{padding:0 0 88px;}
.related h2{font-size:20px; margin-bottom:18px;}
.pill-row{display:flex; flex-wrap:wrap; gap:12px;}
.pill{
  display:inline-flex; align-items:center; height:40px; padding:0 18px;
  border-radius:999px; background:#fff; border:1px solid var(--line);
  color:var(--ink-2); font-size:14.5px; font-weight:500;
  transition:background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.pill:hover{background:var(--blue-050); color:var(--blue-700); border-color:var(--blue-100); text-decoration:none;}
.pill.is-current{background:var(--blue-050); color:var(--blue-700); border-color:var(--blue-100); font-weight:600;}

/* ============ 页脚 ============ */
.footer{background:var(--dark); color:#C3CEE4; padding:64px 0 0; margin-left:0;}
.footer-grid{display:grid; grid-template-columns:1.5fr 1fr 1fr 1fr; gap:40px; padding-bottom:48px;}
.footer-logo{
  display:inline-flex; align-items:center; gap:10px; color:#fff;
  font-size:16px; font-weight:700; text-decoration:none; margin-bottom:16px;
}
.footer-logo:hover{text-decoration:none;}
.footer-logo .brand-mark{background:rgba(255,255,255,.1); border-color:rgba(255,255,255,.22); color:#fff;}
.footer-brand p{font-size:14px; line-height:1.85; color:#B9C4DA; max-width:360px;}
.footer-contact{margin-top:14px; font-size:13.5px; color:#8A97AE;}
.footer-col h3{font-size:15px; font-weight:600; color:#fff; margin-bottom:16px;}
.footer-col li{margin-bottom:12px;}
.footer-col a{font-size:14px; color:#B9C4DA; text-decoration:none;}
.footer-col a:hover{color:#fff; text-decoration:underline;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12); padding:20px 0;}
.footer-bottom .container{display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap;}
.footer-bottom p{font-size:13px; color:#8A97AE;}

/* ============ 响应式 ============ */
@media (max-width:1439px){
  .head-grid{gap:44px;}
}
@media (min-width:1024px) and (max-width:1279px){
  .side-nav{width:88px;}
  .side-nav .brand-text,.side-nav .nav-item span,.side-foot{display:none;}
  .side-nav:hover,.side-nav:focus-within{width:var(--nav-w); box-shadow:var(--sh-lg);}
  .side-nav:hover .brand-text,.side-nav:hover .nav-item span,.side-nav:focus-within .brand-text,.side-nav:focus-within .nav-item span{display:inline;}
  .main{margin-left:88px;}
  h1{font-size:36px;}
  .head-float{right:8px; bottom:-18px; width:200px;}
}
@media (max-width:1023px){
  .topbar{display:flex;}
  .drawer-close{display:flex;}
  .main{margin-left:0;}
  .side-nav{
    left:auto; right:0; width:280px; max-width:84vw;
    transform:translateX(102%); box-shadow:var(--sh-lg);
    transition:transform .3s var(--ease);
  }
  body.drawer-open .side-nav{transform:translateX(0);}
  body.drawer-open .drawer-mask{opacity:1; visibility:visible;}
  .side-nav .nav-list{padding-top:8px;}
  .nav-item{min-height:48px;}
  body.drawer-open{overflow:hidden;}
  section{padding:64px 0;}
  .head-grid{grid-template-columns:1fr; gap:36px;}
  .head-float{position:static; width:100%; margin-top:16px;}
  .page-head{padding:36px 0 48px;}
  h1{font-size:30px;}
  .cta{flex-direction:column; align-items:flex-start; padding:32px 28px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 200px;}
  .flow{grid-template-columns:repeat(2,1fr); gap:28px;}
  .flow::before{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr; gap:32px;}
}
@media (max-width:767px){
  .container{width:calc(100% - 40px);}
  .card-grid{grid-template-columns:1fr; gap:20px;}
  .big-card{min-height:0;}
  .cap-item{grid-template-columns:44px 1fr; gap:14px; padding:18px;}
  .cap-icon{width:44px; height:44px;}
  .footer-grid{grid-template-columns:1fr; gap:28px;}
  .footer-bottom .container{flex-direction:column;}
}
@media (max-width:519px){
  h1{font-size:28px;}
  h2{font-size:23px;}
  body{font-size:15.5px;}
  section{padding:48px 0;}
  .cta-wrap,.related{padding-bottom:48px;}
  .section-head{flex-direction:column; align-items:flex-start; gap:12px;}
  .btn{width:100%;}
  .cta-actions{flex-direction:column;}
  .big-card figure img{height:180px;}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important; transition:none !important;}
}

/* roulang page: category5 */
:root{
  --ink-900:#0E1B33;
  --ink-700:#17347C;
  --ink-600:#1E46A8;
  --ink-500:#2C67D8;
  --ink-300:#7FA4E8;
  --ink-100:#DCE7FB;
  --ink-050:#EEF4FE;
  --orange-600:#E8622A;
  --orange-500:#FF7A2F;
  --orange-100:#FFE6D6;
  --teal-500:#0FA6A0;
  --teal-100:#D9F2F1;
  --text:#0E1B33;
  --text-2:#4B5A78;
  --text-3:#8A97AE;
  --text-inv:#FFFFFF;
  --text-inv-2:#C3CEE4;
  --line:#DFE6F2;
  --line-strong:#C9D4E8;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --surface-2:#EDF2FA;
  --dark:#0E1B33;
  --ok:#17A673;
  --ok-bg:#E8F7F1;
  --warn:#E0A22E;
  --err:#D9453A;
  --info-bg:#EEF4FE;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:16px;
  --r-pill:999px;
  --sh-sm:0 2px 8px -4px rgba(14,27,51,.12);
  --sh-md:0 8px 24px -14px rgba(14,27,51,.20);
  --sh-lg:0 20px 40px -22px rgba(23,52,124,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-w:240px;
}

*,*::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","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC","Inter",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--ink-500);text-decoration:none;}
a:hover{color:var(--ink-700);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,textarea{font-family:inherit;font-size:inherit;}
:focus-visible{outline:3px solid rgba(44,103,216,.32);outline-offset:2px;border-radius:4px;}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 24px;
}

/* ---------- 左侧固定导航 ---------- */
.side-rail{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--nav-w);
  background:var(--surface);
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  z-index:60;
}
.rail-brand{
  display:flex;
  align-items:center;
  gap:10px;
  height:88px;
  padding:0 18px;
  border-bottom:1px solid var(--line);
  flex:0 0 auto;
}
.brand-mark{
  display:grid;
  place-items:center;
  width:32px;height:32px;
  flex:0 0 32px;
  border-radius:10px;
  background:linear-gradient(150deg,var(--ink-700),var(--ink-500));
  color:#fff;
}
.rail-brand-text{
  font-size:16px;
  font-weight:700;
  line-height:1.3;
  color:var(--ink-900);
  letter-spacing:-.01em;
}
.side-nav{
  padding:14px 12px 8px;
  display:flex;
  flex-direction:column;
  gap:2px;
}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  min-height:44px;
  padding:0 12px;
  border-radius:var(--r-md);
  color:var(--text-2);
  font-size:15px;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-item svg{width:20px;height:20px;flex:0 0 20px;color:var(--ink-300);transition:color .2s var(--ease);}
.nav-item:hover{background:var(--ink-050);color:var(--ink-700);}
.nav-item:hover svg{color:var(--ink-500);}
.nav-item.is-active{
  background:var(--ink-050);
  color:var(--ink-700);
  font-weight:600;
}
.nav-item.is-active svg{color:var(--ink-500);}
.nav-item.is-active::before{
  content:"";
  position:absolute;
  left:-12px;top:10px;bottom:10px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--ink-500);
}
.rail-foot{
  margin-top:auto;
  padding:16px 18px 22px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
  line-height:1.7;
}
.rail-foot strong{display:block;color:var(--text-2);font-size:13px;font-weight:600;margin-bottom:6px;}
.rail-foot a{font-size:13px;color:var(--text-2);}
.rail-foot a:hover{color:var(--ink-600);}
.rail-foot p{margin-top:12px;}

/* ---------- 移动端顶部栏 ---------- */
.topbar{
  position:sticky;
  top:0;
  display:none;
  align-items:center;
  justify-content:space-between;
  height:60px;
  padding:0 16px;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  z-index:70;
  transition:box-shadow .2s var(--ease);
}
.topbar.is-scrolled{box-shadow:var(--sh-md);}
.topbar-logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:15px;
  font-weight:700;
  color:var(--ink-900);
}
.topbar-logo .brand-mark{width:28px;height:28px;flex:0 0 28px;border-radius:9px;}
.burger{
  display:grid;
  place-items:center;
  width:44px;height:44px;
  border-radius:var(--r-md);
  color:var(--ink-700);
  transition:background .2s var(--ease);
}
.burger:hover{background:var(--ink-050);}
.burger svg{width:22px;height:22px;}
.scrim{
  position:fixed;
  inset:0;
  background:rgba(14,27,51,.45);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease);
  z-index:65;
}
.scrim.is-open{opacity:1;visibility:visible;}

/* ---------- 主区域 ---------- */
.main{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column;}
.main > main{flex:1 0 auto;}

/* ---------- 面包屑 ---------- */
.crumb{padding:24px 0 0;}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li::after{content:"/";color:var(--line-strong);}
.crumb li:last-child::after{display:none;}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--ink-600);text-decoration:underline;}
.crumb [aria-current="page"]{color:var(--text-3);}

/* ---------- 页头 ---------- */
.page-head{
  background:var(--ink-050);
  border-bottom:1px solid var(--line);
  margin-top:24px;
}
.page-head-inner{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
  padding:56px 0;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:26px;
  padding:0 12px;
  border-radius:var(--r-pill);
  background:var(--ink-100);
  color:var(--ink-700);
  font-size:12px;
  font-weight:500;
}
.page-head h1{
  margin-top:16px;
  font-size:40px;
  line-height:1.22;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ink-900);
}
.lead{
  margin-top:16px;
  max-width:560px;
  font-size:16px;
  line-height:1.85;
  color:var(--text-2);
}
.head-points{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:24px;
}
.head-points span{
  display:inline-flex;
  align-items:center;
  height:30px;
  padding:0 14px;
  border-radius:var(--r-pill);
  background:var(--surface);
  border:1px solid var(--line);
  font-size:13px;
  color:var(--text-2);
}
.page-head-media{
  position:relative;
  border-radius:var(--r-xl);
  overflow:hidden;
  box-shadow:var(--sh-lg);
  aspect-ratio:3/2;
}
.page-head-media img{width:100%;height:100%;object-fit:cover;}
.page-head-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(14,27,51,0) 55%,rgba(14,27,51,.34));
}
.media-note{
  position:absolute;
  left:20px;bottom:18px;
  z-index:2;
  color:#fff;
  font-size:13px;
  letter-spacing:.02em;
}

/* ---------- 主体：目录 + 内容 ---------- */
.body-grid{
  display:grid;
  grid-template-columns:240px minmax(0,1fr);
  gap:48px;
  padding:64px 0 0;
  align-items:start;
}
.toc{
  position:sticky;
  top:32px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-sm);
  padding:20px 16px;
}
.toc-title{
  font-size:13px;
  font-weight:600;
  color:var(--text-3);
  letter-spacing:.06em;
  padding:0 8px 12px;
  border-bottom:1px solid var(--line);
  margin-bottom:10px;
}
.toc-link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:10px;
  min-height:44px;
  padding:9px 10px;
  border-radius:var(--r-md);
  font-size:14px;
  line-height:1.5;
  color:var(--text-2);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.toc-link span{
  font-size:12px;
  font-weight:600;
  color:var(--ink-300);
  font-variant-numeric:tabular-nums;
}
.toc-link:hover{background:var(--ink-050);color:var(--ink-700);}
.toc-link.is-active{background:var(--ink-050);color:var(--ink-700);font-weight:600;}
.toc-link.is-active span{color:var(--ink-500);}
.toc-tip{
  margin-top:14px;
  padding:14px 12px 4px;
  border-top:1px solid var(--line);
  font-size:13px;
  line-height:1.7;
  color:var(--text-3);
}

.content-col{min-width:0;max-width:820px;}

.sec{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-sm);
  padding:32px;
  scroll-margin-top:32px;
}
.sec + .sec{margin-top:24px;}
.sec-title{
  display:flex;
  align-items:baseline;
  gap:14px;
  font-size:30px;
  line-height:1.3;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ink-900);
}
.sec-num{
  font-size:20px;
  font-weight:700;
  color:var(--ink-300);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.sec p{
  margin-top:16px;
  font-size:16px;
  line-height:1.85;
  color:var(--text-2);
}
.sec p strong{color:var(--ink-900);font-weight:600;}
.sec-figure{
  margin:24px 0 0;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--surface-2);
}
.sec-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.sec-figure figcaption{
  padding:10px 16px;
  font-size:13px;
  color:var(--text-3);
  border-top:1px solid var(--line);
  background:var(--surface);
}
.point-list{margin-top:20px;display:grid;gap:10px;}
.point-list li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:15px;
  line-height:1.7;
  color:var(--text-2);
  background:var(--ink-050);
  border-radius:var(--r-md);
  padding:12px 16px;
}
.point-list li::before{
  content:"";
  flex:0 0 6px;
  width:6px;height:6px;
  margin-top:10px;
  border-radius:2px;
  background:var(--ink-500);
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;}
.tag{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:500;
  background:var(--surface-2);
  color:var(--text-2);
}
.tag.tag-ink{background:var(--ink-050);color:var(--ink-700);}
.tag.tag-accent{background:var(--orange-100);color:var(--orange-600);}
.tag.tag-teal{background:var(--teal-100);color:var(--teal-500);}

/* ---------- CTA 条 ---------- */
.cta-band{
  margin-top:32px;
  background:var(--dark);
  border-radius:var(--r-xl);
  padding:40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-60px;top:-80px;
  width:280px;height:280px;
  border-radius:50%;
  border:1px solid rgba(127,164,232,.28);
  pointer-events:none;
}
.cta-band h2{
  font-size:22px;
  line-height:1.4;
  font-weight:700;
  color:var(--text-inv);
  max-width:420px;
}
.cta-band .cta-sub{
  margin-top:10px;
  font-size:13px;
  color:var(--text-inv-2);
}
.cta-actions{display:flex;gap:12px;flex:0 0 auto;position:relative;z-index:2;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:var(--r-md);
  font-size:16px;
  font-weight:600;
  white-space:nowrap;
  transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--ink-500);color:#fff;box-shadow:var(--sh-sm);}
.btn-primary:hover{background:var(--ink-600);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-md);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-sm);}
.btn-accent{background:var(--orange-500);color:#fff;box-shadow:var(--sh-sm);}
.btn-accent:hover{background:var(--orange-600);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-md);}
.btn-ghost{background:#fff;border:1px solid var(--line);color:var(--ink-600);}
.btn-ghost:hover{background:var(--ink-050);border-color:var(--line-strong);color:var(--ink-700);transform:translateY(-2px);}
.btn-ghost-inv{background:transparent;border:1px solid rgba(255,255,255,.28);color:#fff;}
.btn-ghost-inv:hover{background:rgba(255,255,255,.1);color:#fff;}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--ink-500);font-size:15px;font-weight:600;
  text-decoration:underline;text-underline-offset:4px;
}
.btn-text:hover{color:var(--ink-700);}

/* ---------- FAQ ---------- */
.faq-block{margin-top:32px;}
.faq-head h2{
  font-size:30px;
  line-height:1.3;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ink-900);
}
.faq-head p{margin-top:10px;font-size:15px;color:var(--text-2);}
.faq{margin-top:24px;display:grid;gap:12px;}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:12px;
  box-shadow:var(--sh-sm);
  overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item[open]{border-color:rgba(44,103,216,.3);box-shadow:var(--sh-md);}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:56px;
  padding:0 20px;
  font-size:15px;
  font-weight:600;
  color:var(--ink-900);
  list-style:none;
  cursor:pointer;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  flex:0 0 20px;
  text-align:center;
  font-size:20px;
  font-weight:500;
  color:var(--ink-500);
  transition:transform .2s var(--ease),color .2s var(--ease);
}
.faq-item[open] summary::after{content:"−";}
.faq-a{
  padding:0 20px 18px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
  border-top:1px solid var(--line);
  padding-top:14px;
  margin:0 20px 18px;
  padding-left:0;
  padding-right:0;
}

/* ---------- 相关分类 ---------- */
.relate{margin-top:40px;}
.relate h2{font-size:18px;font-weight:600;color:var(--ink-900);}
.chip-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;}
.chip{
  display:inline-flex;
  align-items:center;
  height:34px;
  padding:0 16px;
  border-radius:var(--r-pill);
  background:var(--surface);
  border:1px solid var(--line);
  font-size:14px;
  color:var(--text-2);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.chip:hover{background:var(--ink-050);border-color:var(--line-strong);color:var(--ink-700);transform:translateY(-2px);}
.chip.is-current{background:var(--ink-050);border-color:rgba(44,103,216,.32);color:var(--ink-700);font-weight:600;}

/* ---------- 页脚 ---------- */
.footer{background:var(--dark);color:var(--text-inv-2);margin-top:88px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
  padding-top:64px;
  padding-bottom:48px;
}
.footer-logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:16px;
  font-weight:700;
}
.footer-logo .brand-mark{background:rgba(255,255,255,.08);color:var(--ink-300);}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:#B9C4DA;max-width:360px;}
.footer-contact{font-size:13px !important;color:#8A97AE !important;margin-top:14px !important;}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px;}
.footer-col li{margin-bottom:12px;}
.footer-col a{font-size:14px;color:#B9C4DA;}
.footer-col a:hover{color:#fff;text-decoration:underline;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;}
.footer-bottom .container{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;}
.footer-bottom p{font-size:13px;color:#8A97AE;}

/* ---------- 响应式 ---------- */
@media (max-width:1439px){
  .container{max-width:1160px;}
  .body-grid{gap:36px;grid-template-columns:220px minmax(0,1fr);}
}
@media (max-width:1279px){
  :root{--nav-w:88px;}
  .rail-brand{justify-content:center;padding:0;height:80px;}
  .rail-brand-text{display:none;}
  .nav-item{justify-content:center;padding:0;}
  .nav-item span{display:none;}
  .nav-item.is-active::before{left:-12px;}
  .rail-foot{display:none;}
  .side-rail:hover{width:240px;}
  .side-rail:hover .rail-brand-text,
  .side-rail:hover .nav-item span{display:inline;}
  .side-rail:hover .rail-brand{justify-content:flex-start;padding:0 18px;}
  .side-rail:hover .nav-item{justify-content:flex-start;padding:0 12px;}
  .side-rail:hover .rail-foot{display:block;}
  .main{margin-left:var(--nav-w);}
  .page-head-inner{gap:32px;}
  .page-head h1{font-size:34px;}
}
@media (max-width:1023px){
  .side-rail{
    top:0;bottom:0;right:0;left:auto;
    width:280px;
    max-width:84vw;
    border-right:0;
    border-left:1px solid var(--line);
    box-shadow:var(--sh-lg);
    transform:translateX(102%);
    transition:transform .25s var(--ease);
  }
  .side-rail.is-open{transform:translateX(0);}
  .side-rail .rail-brand{justify-content:flex-start;padding:0 18px;height:72px;}
  .side-rail .rail-brand-text{display:inline;}
  .side-rail .nav-item{justify-content:flex-start;padding:0 12px;}
  .side-rail .nav-item span{display:inline;}
  .side-rail .rail-foot{display:block;}
  .main{margin-left:0;}
  .topbar{display:flex;}
  .page-head-inner{grid-template-columns:1fr;padding:40px 0;gap:28px;}
  .page-head h1{font-size:30px;}
  .page-head-media{max-width:560px;}
  .body-grid{grid-template-columns:1fr;gap:28px;padding-top:40px;}
  .toc{position:static;}
  .toc-link{display:inline-flex;margin:2px 4px 2px 0;}
  .toc-tip{display:none;}
  .toc > nav{display:flex;flex-wrap:wrap;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .crumb{padding-top:18px;}
  .page-head{margin-top:16px;}
  .page-head h1{font-size:26px;}
  .lead{font-size:15.5px;}
  .sec{padding:24px 20px;border-radius:12px;}
  .sec-title{font-size:23px;gap:10px;}
  .sec-num{font-size:16px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px;}
  .cta-band h2{font-size:19px;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .footer{margin-top:56px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding-top:44px;padding-bottom:32px;}
  .faq-head h2{font-size:23px;}
}
@media (max-width:519px){
  body{font-size:15.5px;}
  .page-head h1{font-size:24px;}
  .sec-title{font-size:21px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom .container{flex-direction:column;}
  .btn{width:100%;}
  .chip,.tag{height:auto;padding:6px 14px;}
}

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