/* roulang page: index */
:root{
  --brand:#1A5CD8;
  --brand-deep:#0F3E9E;
  --brand-light:#E8F0FE;
  --teal:#12A594;
  --teal-light:#E4F6F3;
  --orange:#FF7A2F;
  --bg:#F6F8FC;
  --bg-alt:#F1F5FB;
  --surface:#FFFFFF;
  --dark:#0F3E9E;
  --footer-dark:#0F1B2D;
  --text:#0F1B2D;
  --text-2:#4A5A70;
  --text-3:#8494A8;
  --border:#E4EAF4;
  --line:#EEF2F8;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --r-input:10px;
  --r-dark:24px;
  --sh-1:0 4px 16px rgba(16,42,86,.06);
  --sh-2:0 14px 32px rgba(16,42,86,.12);
  --sh-cta:0 10px 28px rgba(26,92,216,.28);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease-out,background-color .2s ease-out,border-color .2s ease-out,transform .2s ease-out;}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:0;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
section[id]{scroll-margin-top:88px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out,background-color .2s ease-out;
}
.site-header.is-scrolled{background:#fff;box-shadow:0 6px 20px rgba(16,42,86,.08);}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  height:70px;
}
.header-left{display:flex;align-items:center;gap:22px;justify-content:flex-start;}
.header-right{display:flex;align-items:center;gap:22px;justify-content:flex-end;}
.nav-side{display:flex;align-items:center;gap:22px;}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;color:var(--text-2);
  padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-2px;
  width:0;height:2px;border-radius:2px;background:var(--brand);
  transform:translateX(-50%);transition:width .2s ease-out;
}
.nav-link:hover{color:var(--brand);}
.nav-link:hover::after{width:16px;}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{width:16px;}
.brand{display:flex;align-items:center;gap:10px;justify-self:center;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;flex:0 0 36px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  display:grid;place-items:center;
  box-shadow:0 6px 16px rgba(26,92,216,.28);
}
.brand-text{font-size:17px;font-weight:700;color:var(--text);white-space:nowrap;}
.menu-btn{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--border);background:#fff;place-items:center;
}
.menu-btn span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);position:relative;}
.menu-btn span::before,.menu-btn span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--text);
}
.menu-btn span::before{top:-6px;}
.menu-btn span::after{top:6px;}
.header-cta{display:none;}
.mobile-panel{
  display:none;
  background:#fff;
  border-bottom:1px solid var(--border);
  box-shadow:0 16px 32px rgba(16,42,86,.12);
  padding:10px 16px 20px;
}
.mobile-panel.is-open{display:block;}
.mp-link{
  display:flex;align-items:center;
  height:46px;padding:0 12px;border-radius:10px;
  font-size:15px;color:var(--text-2);
}
.mp-link:hover{background:var(--bg-alt);color:var(--brand);}
.mp-link.is-active{color:var(--brand);background:var(--brand-light);font-weight:600;}
.mp-cta{width:100%;margin-top:10px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 22px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:500;line-height:1;
  border:1px solid transparent;
  transition:all .2s ease-out;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(26,92,216,.24);}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:0 10px 24px rgba(26,92,216,.32);}
.btn-primary:active{transform:translateY(1px);}
.btn-outline{background:#fff;border-color:#D7E2F5;color:var(--brand);}
.btn-outline:hover{background:var(--brand-light);}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.55);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.14);}
.btn-sm{min-height:40px;padding:10px 18px;font-size:14px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:500;color:var(--brand);
}
.text-link:hover{gap:10px;color:var(--brand-deep);}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;padding:5px 12px;border-radius:999px;
  background:var(--brand-light);color:var(--brand);font-weight:500;
}
.badge-dot{width:7px;height:7px;border-radius:50%;background:var(--teal);}
.tag{
  display:inline-flex;align-items:center;
  font-size:13px;padding:4px 10px;border-radius:999px;
  background:var(--teal-light);color:#0E7C6E;
}
.tag-orange{background:var(--orange);color:#fff;}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  padding:132px 0 92px;
  background:linear-gradient(180deg,#FFFFFF 0%,var(--bg-alt) 100%);
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;right:0;bottom:0;width:340px;height:230px;
  background-image:radial-gradient(rgba(26,92,216,.16) 1px,transparent 1px);
  background-size:16px 16px;opacity:.65;pointer-events:none;
}
.hero-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:7fr 5fr;
  gap:56px;align-items:center;
}
.hero-copy h1{
  margin-top:18px;
  font-size:clamp(30px,4.2vw,52px);
  font-weight:700;line-height:1.25;
  color:var(--text);
}
.hero-copy h1 em{font-style:normal;color:var(--brand);}
.hero-sub{
  margin-top:16px;
  font-size:17px;color:var(--text-2);line-height:1.75;
  max-width:520px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.trust-row{
  display:flex;gap:36px;flex-wrap:wrap;
  margin-top:38px;padding-top:26px;border-top:1px solid var(--border);
}
.trust-row li{display:flex;flex-direction:column;gap:2px;}
.trust-row strong{font-size:24px;font-weight:700;color:var(--teal);line-height:1.2;}
.trust-row span{font-size:13px;color:var(--text-3);}
.hero-media{position:relative;}
.hero-media img{
  width:100%;aspect-ratio:16/11;object-fit:cover;
  border-radius:var(--r-card);
  box-shadow:var(--sh-2);
  background:var(--brand-light);
}
.float-card{
  position:absolute;left:-18px;bottom:-20px;
  background:#fff;border:1px solid var(--border);border-radius:14px;
  padding:14px 18px;box-shadow:var(--sh-2);min-width:186px;
}
.float-card .fc-label{font-size:12px;color:var(--text-3);display:flex;align-items:center;gap:6px;}
.float-card .fc-label i{width:7px;height:7px;border-radius:50%;background:var(--teal);display:inline-block;}
.float-card .fc-num{font-size:22px;font-weight:700;color:var(--brand);margin-top:4px;}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section-white{background:#fff;}
.section-alt{background:var(--bg-alt);}
.section-head{max-width:780px;margin-bottom:40px;}
.sec-title{
  position:relative;padding-left:22px;
  font-size:clamp(24px,3.2vw,32px);font-weight:700;line-height:1.3;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:.26em;bottom:.26em;
  width:4px;border-radius:2px;background:var(--brand);
}
.sec-title::after{
  content:"";position:absolute;left:-2px;bottom:.24em;
  width:8px;height:8px;border-radius:2px;background:var(--teal);
}
.section-lead{margin-top:14px;font-size:16px;color:var(--text-2);line-height:1.8;}
.section-foot{margin-top:36px;}

/* ---------- 卖点区 ---------- */
.features-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.step-list{display:flex;flex-direction:column;}
.step-item{display:flex;gap:14px;padding:18px 0;border-bottom:1px solid var(--line);}
.step-item:first-child{padding-top:0;}
.step-item:last-child{border-bottom:0;}
.step-num{
  flex:0 0 38px;width:38px;height:38px;border-radius:10px;
  background:var(--brand-light);color:var(--brand);
  font-size:14px;font-weight:700;display:grid;place-items:center;
}
.step-item h4{font-size:17px;font-weight:600;}
.step-item p{font-size:14px;color:var(--text-2);margin-top:4px;line-height:1.75;}
.feature-rows{display:flex;flex-direction:column;gap:28px;}
.media-row{
  display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:center;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-1);transition:box-shadow .2s ease-out,border-color .2s ease-out;
}
.media-row:hover{box-shadow:var(--sh-2);border-color:#C9DAF5;}
.media-row.flip .media-figure{order:2;}
.media-figure img{
  width:100%;aspect-ratio:16/11;object-fit:cover;
  border-radius:var(--r-img);background:var(--brand-light);
}
.media-text h3{font-size:20px;font-weight:600;}
.media-text p{font-size:15px;color:var(--text-2);margin-top:10px;line-height:1.8;}
.media-text .text-link{margin-top:14px;}

/* ---------- 演示区 ---------- */
.browser{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
}
.browser-bar{
  display:flex;align-items:center;gap:8px;
  padding:12px 16px;background:var(--bg-alt);border-bottom:1px solid var(--line);
}
.browser-bar .dot{width:10px;height:10px;border-radius:50%;background:#D7DFEC;}
.browser-bar .dot:nth-child(1){background:#FFB6A3;}
.browser-bar .dot:nth-child(2){background:#FFDB9B;}
.browser-bar .dot:nth-child(3){background:#A9E3C1;}
.addr-bar{
  flex:1;height:28px;margin-left:8px;border-radius:6px;
  background:#fff;border:1px solid var(--border);
  display:flex;align-items:center;padding:0 12px;
  font-size:12px;color:var(--text-3);overflow:hidden;white-space:nowrap;text-overflow:ellipsis;
}
.browser-body{position:relative;}
.browser-body img{width:100%;aspect-ratio:16/8;object-fit:cover;background:var(--brand-light);}
.demo-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.demo-tab{
  font-size:13px;padding:7px 16px;border-radius:999px;
  background:#fff;border:1px solid var(--border);color:var(--text-2);
}
.demo-tab.is-active{background:var(--brand-light);color:var(--brand);border-color:#C9DAF5;font-weight:600;}

/* ---------- 证据区块 ---------- */
.proof{
  background:var(--dark);color:#fff;border-radius:var(--r-dark);
  padding:56px 48px;position:relative;overflow:hidden;
}
.proof::after{
  content:"";position:absolute;right:-40px;top:-40px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.12) 0%,rgba(255,255,255,0) 70%);
}
.proof-head{position:relative;z-index:1;}
.proof-head h2{font-size:clamp(24px,3vw,30px);color:#fff;padding-left:20px;position:relative;}
.proof-head h2::before{
  content:"";position:absolute;left:0;top:.26em;bottom:.26em;width:4px;border-radius:2px;background:#7FE7DA;
}
.proof-head p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.72);max-width:660px;}
.proof-metrics{
  position:relative;z-index:1;
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  margin-top:36px;padding-bottom:28px;
  border-bottom:1px solid rgba(255,255,255,.16);
}
.proof-metric strong{display:block;font-size:36px;font-weight:700;color:#7FE7DA;line-height:1.2;}
.proof-metric span{display:block;font-size:14px;color:rgba(255,255,255,.78);margin-top:6px;}
.proof-notes{position:relative;z-index:1;margin-top:24px;display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.proof-notes p{font-size:14px;color:rgba(255,255,255,.72);line-height:1.8;}

/* ---------- 价格区 ---------- */
.price-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:940px;margin:0 auto;}
.price-card{
  position:relative;background:#fff;border:1px solid var(--border);
  border-radius:var(--r-card);padding:32px;box-shadow:var(--sh-1);
  display:flex;flex-direction:column;transition:box-shadow .2s ease-out,border-color .2s ease-out;
}
.price-card:hover{box-shadow:var(--sh-2);}
.price-card.is-featured{border-color:#C9DAF5;box-shadow:var(--sh-2);}
.price-tag{position:absolute;top:-13px;right:24px;background:var(--orange);color:#fff;font-size:13px;padding:4px 14px;border-radius:999px;}
.price-card h3{font-size:20px;font-weight:600;}
.price-scope{font-size:14px;color:var(--text-2);margin-top:8px;}
.price-value{margin-top:18px;font-size:28px;font-weight:700;color:var(--brand);}
.price-value small{font-size:14px;font-weight:400;color:var(--text-3);margin-left:6px;}
.price-list{margin-top:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.price-list li{display:flex;gap:10px;font-size:15px;color:var(--text-2);line-height:1.7;}
.price-list svg{flex:0 0 18px;margin-top:5px;}
.price-card .btn{margin-top:26px;width:100%;}

/* ---------- 最新信息 ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  display:flex;flex-direction:column;background:#fff;
  border:1px solid var(--border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#C9DAF5;}
.news-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--brand-light);}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.news-card:hover .news-thumb img{transform:scale(1.04);}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-title{
  font-size:17px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card:hover .news-title{color:var(--brand);}
.news-desc{
  font-size:14px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-3);
}
.news-meta .meta-time{display:inline-flex;align-items:center;gap:6px;}
.news-arrow{color:var(--brand);font-weight:500;}
.empty-state{
  height:auto;min-height:150px;border-radius:var(--r-card);
  background:var(--bg-alt);border:1px dashed var(--border);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:36px 24px;text-align:center;grid-column:1/-1;
}
.empty-state p{font-size:15px;color:var(--text-2);}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;margin:0 auto;display:flex;flex-direction:column;gap:12px;}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;transition:border-color .2s ease-out;}
.faq-item.is-open{border-color:#C9DAF5;box-shadow:var(--sh-1);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;text-align:left;
  font-size:17px;font-weight:500;color:var(--text);line-height:1.6;
}
.faq-item.is-open .faq-q{color:var(--brand);}
.faq-icon{
  flex:0 0 26px;width:26px;height:26px;border-radius:8px;
  background:var(--brand-light);color:var(--brand);
  display:grid;place-items:center;font-size:16px;line-height:1;
  transition:transform .24s ease-out;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--brand);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease-out;}
.faq-a p{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--text-2);}

/* ---------- 结尾 CTA ---------- */
.final-cta{
  position:relative;border-radius:var(--r-dark);overflow:hidden;
  padding:64px 48px;color:#fff;
  background-image:linear-gradient(120deg,rgba(15,62,158,.94) 0%,rgba(26,92,216,.82) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.final-cta h2{font-size:clamp(24px,3.2vw,34px);color:#fff;}
.final-cta p{margin-top:14px;font-size:16px;color:rgba(255,255,255,.82);max-width:620px;line-height:1.8;}
.final-cta .hero-cta{margin-top:28px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--footer-dark);color:#fff;margin-top:88px;}
.footer-top{border-top:1px solid rgba(255,255,255,.08);}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:32px;
  padding:64px 0 40px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;}
.footer-desc{font-size:14px;color:rgba(255,255,255,.68);line-height:1.85;max-width:300px;}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:4px;}
.footer-link{
  display:inline-block;font-size:14px;color:rgba(255,255,255,.72);
  padding:6px 0;transition:color .2s ease-out,transform .2s ease-out;
}
.footer-link:hover{color:#fff;transform:translateX(2px);}
.footer-info p{font-size:14px;color:rgba(255,255,255,.72);line-height:1.9;}
.footer-info span{color:rgba(255,255,255,.5);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:22px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.56);
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:90;
  display:flex;align-items:center;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s ease-out,transform .24s ease-out,visibility .24s ease-out;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:none;}
.float-btn{
  display:inline-flex;align-items:center;gap:8px;
  min-height:48px;padding:14px 24px;border-radius:999px;
  background:var(--brand);color:#fff;font-size:15px;font-weight:500;
  box-shadow:var(--sh-cta);
}
.float-btn:hover{background:var(--brand-deep);transform:translateY(-2px);}
.float-link{display:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-side{display:none;}
  .header-inner{grid-template-columns:auto 1fr auto;gap:12px;}
  .menu-btn{display:grid;}
  .header-cta{display:inline-flex;}
  .hero{padding:112px 0 76px;}
  .hero-inner{grid-template-columns:1fr;gap:40px;}
  .hero-media img{aspect-ratio:16/9;max-height:320px;}
  .float-card{left:12px;bottom:-16px;}
  .features-grid{grid-template-columns:1fr;gap:36px;}
  .section{padding:72px 0;}
  .proof{padding:44px 32px;}
  .proof-metrics{grid-template-columns:repeat(2,1fr);gap:28px 24px;}
  .proof-notes{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-desc{max-width:none;}
}
@media (max-width:767px){
  body{padding-bottom:74px;}
  .container{padding:0 16px;}
  .hero{padding:100px 0 64px;}
  .hero-copy h1{font-size:clamp(28px,7vw,36px);}
  .hero-sub{font-size:16px;}
  .hero-cta{gap:12px;}
  .hero-cta .btn{flex:1 1 auto;}
  .trust-row{gap:20px;justify-content:space-between;}
  .trust-row strong{font-size:20px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:30px;}
  .media-row{grid-template-columns:1fr;gap:16px;padding:16px;}
  .media-row.flip .media-figure{order:0;}
  .proof{padding:34px 22px;border-radius:20px;}
  .proof-metric strong{font-size:28px;}
  .price-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .final-cta{padding:40px 22px;border-radius:20px;}
  .faq-q{font-size:16px;padding:16px 18px;}
  .faq-a p{padding:0 18px 18px;}
  .footer-grid{grid-template-columns:1fr;padding:44px 0 28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .float-cta{
    left:0;right:0;bottom:0;gap:14px;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    background:rgba(255,255,255,.97);
    border-top:1px solid var(--border);
    box-shadow:0 -8px 24px rgba(16,42,86,.1);
    align-items:center;
  }
  .float-cta .float-btn{flex:1;justify-content:center;}
  .float-cta .float-link{display:inline-flex;font-size:14px;color:var(--text-2);padding:12px 4px;white-space:nowrap;}
}
@media print{
  .site-header,.float-cta,.site-footer nav,.site-footer .footer-col{display:none !important;}
}

/* roulang page: article */
:root{
  --brand:#1A5CD8;
  --brand-deep:#0F3E9E;
  --brand-light:#E8F0FE;
  --teal:#12A594;
  --teal-light:#E4F6F3;
  --orange:#FF7A2F;
  --bg:#F6F8FC;
  --bg-alt:#F1F5FB;
  --ink:#0F1B2D;
  --ink-2:#4A5A70;
  --ink-3:#8494A8;
  --line:#E4EAF4;
  --line-soft:#EEF2F8;
  --ok:#16A34A;
  --warn:#E5484D;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --sh-card:0 4px 16px rgba(16,42,86,.06);
  --sh-card-hover:0 14px 32px rgba(16,42,86,.12);
  --sh-cta:0 10px 28px rgba(26,92,216,.28);
  --maxw:1200px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{line-height:1.3;margin:0;font-weight:600;letter-spacing:0}
p{margin:0 0 1em}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font-family:inherit}
ul,ol{margin:0;padding:0}
li{list-style:none}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;width:100%}
.num{font-variant-numeric:tabular-nums;font-family:Inter,ui-sans-serif,system-ui,sans-serif}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(16,42,86,.09)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px}
.nav-side{display:flex;align-items:center;gap:28px;flex:1;min-width:0}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.nav-link{
  position:relative;display:inline-block;
  font-size:15px;font-weight:500;color:var(--ink-2);
  padding:6px 0;white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;
  width:0;height:2px;border-radius:2px;background:var(--brand);
  transform:translateX(-50%);
  transition:width .2s var(--ease);
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{width:16px}
.nav-link.is-active{color:var(--brand)}
.nav-link.is-active::after{width:16px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;padding:4px}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#2C6DF0,var(--brand-deep));
  box-shadow:0 6px 16px rgba(26,92,216,.26);
}
.brand-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:0;white-space:nowrap}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--line);background:#fff;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.menu-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-2);transition:transform .2s var(--ease),opacity .2s var(--ease)}
.menu-toggle:hover{background:var(--brand-light);border-color:#C9DAF5}
.menu-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-cta{display:none}
.mobile-panel{display:none}
.mobile-panel.is-open{display:block;background:#fff;border-top:1px solid var(--line);box-shadow:0 18px 34px rgba(16,42,86,.1)}
.mobile-link{
  display:block;line-height:44px;padding:2px 0;
  font-size:15px;font-weight:500;color:var(--ink-2);
  border-bottom:1px solid var(--line-soft);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.mobile-link:hover,.mobile-link.is-active{color:var(--brand);padding-left:6px}
.mobile-panel .btn{width:100%;margin:18px 0 22px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:14px 28px;
  font-size:15px;font-weight:500;line-height:1.2;
  border-radius:var(--r-btn);border:1px solid transparent;
  cursor:pointer;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:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(26,92,216,.24)}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:0 10px 26px rgba(26,92,216,.32)}
.btn-outline{background:#fff;color:var(--brand);border-color:#D7E2F5}
.btn-outline:hover{background:var(--brand-light);border-color:#C9DAF5;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-sm{min-height:38px;padding:9px 18px;font-size:14px}

/* ============ 徽章与标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:500;line-height:1.4;
  padding:4px 12px;border-radius:999px;
  background:var(--brand-light);color:var(--brand);
}
.badge-teal{background:var(--teal-light);color:var(--teal)}
.badge-orange{background:var(--orange);color:#fff}
.badge-dot{width:6px;height:6px;border-radius:50%;background:currentColor;display:inline-block}

/* ============ 面包屑 ============ */
.page-top{background:linear-gradient(180deg,#FFFFFF 0%,var(--bg-alt) 100%);border-bottom:1px solid var(--line)}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:nowrap;
  font-size:14px;color:var(--ink-3);
  padding:20px 0 0;
  white-space:nowrap;overflow:hidden;
}
.breadcrumb a{color:var(--ink-3);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C4D0E0}
.breadcrumb .current{color:var(--brand);overflow:hidden;text-overflow:ellipsis;max-width:52vw}

/* ============ 文章头部 ============ */
.article-head{padding:20px 0 40px;max-width:880px}
.article-head .badge{margin-bottom:18px}
.article-title{
  font-size:clamp(26px,3.6vw,40px);
  font-weight:700;color:var(--ink);
  line-height:1.32;margin:0 0 20px;
  max-width:900px;
}
.meta-row{
  display:flex;align-items:center;flex-wrap:wrap;gap:0;
  font-size:14px;color:var(--ink-3);
}
.meta-row .meta-item{display:inline-flex;align-items:center;gap:6px;padding:0 14px 0 0;margin-right:14px;border-right:1px solid var(--line)}
.meta-row .meta-item:last-child{border-right:0;margin-right:0;padding-right:0}
.meta-row svg{flex:0 0 auto;opacity:.75}

/* ============ 封面图 ============ */
.cover-wrap{margin:0 auto 48px;max-width:1000px}
.cover-frame{
  position:relative;aspect-ratio:16/9;width:100%;
  border-radius:var(--r-card);overflow:hidden;
  background:var(--bg-alt);border:1px solid var(--line);
  box-shadow:var(--sh-card);
}
.cover-frame img{width:100%;height:100%;object-fit:cover}
.cover-cap{margin-top:12px;font-size:13px;color:var(--ink-3);text-align:center}

/* ============ 正文 ============ */
.article-main{padding:0 0 24px}
.article-body{
  max-width:760px;margin:0 auto;
  font-size:17px;line-height:1.85;color:var(--ink-2);
}
.article-body p{margin:0 0 1em}
.article-body h2{
  position:relative;font-size:clamp(22px,2.6vw,28px);font-weight:700;color:var(--ink);
  margin:1.9em 0 .75em;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.32em;
  width:4px;height:24px;border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:21px;font-weight:600;color:var(--ink);margin:1.6em 0 .6em}
.article-body h4{font-size:17px;font-weight:600;color:var(--ink);margin:1.4em 0 .5em}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(26,92,216,.32);transition:border-color .2s var(--ease)}
.article-body a:hover{border-bottom-color:var(--brand)}
.article-body img{border-radius:var(--r-img);margin:1.4em auto;height:auto}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:10px}
.article-body blockquote{
  margin:1.5em 0;padding:16px 20px;
  background:var(--teal-light);
  border-left:3px solid var(--teal);
  border-radius:0 12px 12px 0;
  color:var(--ink-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body ul,.article-body ol{padding-left:1.5em;margin:0 0 1.2em}
.article-body ul li{list-style:disc;margin:.4em 0}
.article-body ol li{list-style:decimal;margin:.4em 0}
.article-body pre{
  background:var(--bg-alt);border:1px solid var(--line);border-radius:10px;
  padding:16px 18px;overflow-x:auto;margin:1.4em 0;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;line-height:1.7;color:var(--ink);
}
.article-body code{
  background:var(--bg-alt);border-radius:6px;padding:2px 6px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.92em;color:var(--brand-deep);
}
.article-body pre code{background:none;padding:0;color:inherit}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.article-body strong{color:var(--ink);font-weight:600}

/* ============ 标签行 ============ */
.tag-row{
  max-width:760px;margin:44px auto 0;padding-top:24px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
}
.tag-row .label{font-size:14px;color:var(--ink-3);margin-right:4px}
.tag{
  display:inline-flex;align-items:center;
  font-size:13px;padding:5px 14px;border-radius:999px;
  background:var(--brand-light);color:var(--brand);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.tag:hover{background:var(--brand);color:#fff}
.tag.teal{background:var(--teal-light);color:var(--teal)}
.tag.teal:hover{background:var(--teal);color:#fff}

/* ============ 空态 ============ */
.empty-state{
  max-width:760px;margin:0 auto;
  min-height:96px;padding:40px 24px;
  background:var(--bg-alt);border:1px dashed #D7E2F5;border-radius:var(--r-card);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;color:var(--ink-3);font-size:15px;
}
.empty-state svg{opacity:.5}

/* ============ 区块 ============ */
.section{padding:88px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-title{position:relative;padding-left:16px;font-size:clamp(24px,3vw,32px);font-weight:700;color:var(--ink)}
.section-title::before{content:"";position:absolute;left:0;top:.28em;width:4px;height:26px;border-radius:2px;background:var(--brand)}
.section-title .seal{
  display:inline-block;width:8px;height:8px;border-radius:2px;background:var(--brand);
  vertical-align:middle;margin-left:10px;
}
.section-sub{margin:10px 0 0;font-size:15px;color:var(--ink-2);max-width:640px}
.more-link{font-size:15px;font-weight:500;color:var(--brand);display:inline-flex;align-items:center;gap:6px;transition:gap .2s var(--ease)}
.more-link:hover{gap:10px}

/* ============ 卡片 ============ */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-card);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover);border-color:#C9DAF5}
.post-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-alt)}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.post-card:hover .thumb img{transform:scale(1.04)}
.post-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card h3{
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card p{
  font-size:14px;color:var(--ink-2);line-height:1.75;margin:0;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card .foot{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line-soft);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}
.post-card .foot .arrow{color:var(--brand);font-weight:500;transition:transform .2s var(--ease)}
.post-card:hover .foot .arrow{transform:translateX(3px)}

/* ============ 结尾 CTA ============ */
.end-cta{
  position:relative;overflow:hidden;
  background:var(--brand-deep);
  border-radius:24px;
  padding:56px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  color:#fff;
}
.end-cta::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:28px 28px;pointer-events:none;
}
.end-cta h2{font-size:clamp(22px,2.8vw,30px);font-weight:700;color:#fff;margin-bottom:12px;position:relative;z-index:1}
.end-cta p{margin:0;color:rgba(255,255,255,.78);font-size:15px;max-width:560px;position:relative;z-index:1}
.end-cta .actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-deep);color:rgba(255,255,255,.74);padding:64px 0 0;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:32px;padding-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.14);box-shadow:none}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:600}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.72);margin:0;max-width:360px}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin:0 0 18px}
.footer-col li{margin-bottom:10px}
.footer-link{
  display:inline-block;font-size:14px;color:rgba(255,255,255,.72);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-link:hover{color:#fff;transform:translateX(2px)}
.footer-info p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.72);margin:0}
.footer-info p span{color:rgba(255,255,255,.5)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.58);
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 24px;border-radius:999px;
  background:var(--brand);color:#fff;font-size:15px;font-weight:500;
  box-shadow:var(--sh-cta);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),background .2s var(--ease),visibility .25s;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--brand-deep);transform:translateY(-2px)}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-side{display:none}
  .menu-toggle{display:flex}
  .mobile-cta{display:inline-flex}
  .brand{flex:1;justify-content:center}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
  .end-cta{flex-direction:column;align-items:flex-start;padding:44px 32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .header-inner{height:64px;gap:10px}
  .brand-text{font-size:15px}
  .brand-mark{width:34px;height:34px;border-radius:10px}
  .btn{padding:12px 20px;font-size:15px}
  .section{padding:56px 0}
  .section-head{margin-bottom:28px}
  .card-grid{grid-template-columns:1fr;gap:20px}
  .article-title{font-size:24px}
  .breadcrumb{padding-top:16px}
  .breadcrumb .current{max-width:40vw}
  .cover-wrap{margin-bottom:32px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:21px;margin-top:1.6em}
  .tag-row{margin-top:32px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:28px}
  .site-footer{padding-top:52px;margin-top:64px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .end-cta{border-radius:16px;padding:32px 22px}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;
    justify-content:center;padding:16px 16px calc(16px + env(safe-area-inset-bottom,0px));
    box-shadow:0 -6px 24px rgba(16,42,86,.16);
  }
}
@media print{
  .site-header,.site-footer,.float-cta,.end-cta,.mobile-panel{display:none !important}
  body{background:#fff}
}

/* roulang page: category1 */
:root{
  --brand:#1A5CD8;
  --brand-deep:#0F3E9E;
  --brand-light:#E8F0FE;
  --teal:#12A594;
  --teal-light:#E4F6F3;
  --orange:#FF7A2F;
  --bg:#F6F8FC;
  --bg-alt:#F1F5FB;
  --ink:#0F1B2D;
  --ink-2:#4A5A70;
  --ink-3:#8494A8;
  --border:#E4EAF4;
  --line:#EEF2F8;
  --success:#16A34A;
  --danger:#E5484D;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --r-deep:24px;
  --sh-card:0 4px 16px rgba(16,42,86,.06);
  --sh-hover:0 14px 32px rgba(16,42,86,.12);
  --sh-cta:0 10px 28px rgba(26,92,216,.28);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:88px;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
.num{font-variant-numeric:tabular-nums;font-family:Inter,ui-sans-serif,system-ui,sans-serif;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (max-width:640px){.container{padding:0 16px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px) saturate(160%);
  border-bottom:1px solid var(--border);
  transition:box-shadow .2s ease-out;
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(16,42,86,.08);}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  height:72px;
}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;color:var(--ink-2);
  padding:6px 0;
  white-space:nowrap;
  transition:color .2s ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;height:2px;width:0;
  background:var(--brand);transform:translateX(-50%);
  transition:width .2s ease-out;
}
.nav-link:hover{color:var(--brand);}
.nav-link:hover::after{width:16px;}
.nav-link.is-active{color:var(--brand);}
.nav-link.is-active::after{width:16px;}
.nav-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.brand{display:flex;align-items:center;gap:10px;justify-self:center;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(140deg,var(--brand) 0%,var(--brand-deep) 100%);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 14px rgba(26,92,216,.24);
  flex:none;
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:0;color:var(--ink);white-space:nowrap;}

.nav-toggle{display:none;background:none;border:0;padding:8px;cursor:pointer;justify-self:start;border-radius:8px;}
.nav-toggle-bar{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;margin:4px 0;transition:transform .2s ease-out,opacity .2s ease-out;}
.nav-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.header-cta{display:none;justify-self:end;}

.mobile-panel{
  display:block;
  max-height:0;overflow:hidden;
  background:#fff;
  border-top:1px solid transparent;
  transition:max-height .26s ease-out,border-color .2s ease-out;
}
.mobile-panel.is-open{max-height:560px;border-top-color:var(--border);}
.mobile-panel-inner{padding:10px 0 20px;}
.mobile-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:44px;padding:0 4px;font-size:15px;font-weight:500;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.mobile-link.is-active{color:var(--brand);}
.mobile-link:last-of-type{border-bottom:0;}
.mobile-cta{margin-top:14px;display:block;text-align:center;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;min-height:44px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:500;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:all .2s ease-out;
}
.btn-primary{
  background:var(--brand);color:#fff;
  box-shadow:0 6px 18px rgba(26,92,216,.24);
}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:0 10px 26px rgba(15,62,158,.3);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{
  background:#fff;color:var(--brand);border-color:#D7E2F5;
}
.btn-outline:hover{background:var(--brand-light);border-color:#C9DAF5;transform:translateY(-1px);}
.btn-ghost{
  background:transparent;color:#fff;border-color:rgba(255,255,255,.6);
}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-1px);}
.btn-sm{padding:10px 18px;min-height:40px;font-size:14px;}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.btn-ghost:focus-visible{outline-color:#fff;}
@media (max-width:640px){
  .btn{padding:12px 20px;}
}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  font-size:13px;font-weight:500;line-height:1.6;
  background:var(--brand-light);color:var(--brand);
}
.badge-teal{background:var(--teal-light);color:var(--teal);}
.badge-orange{background:var(--orange);color:#fff;}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:var(--ink-3);
  margin-bottom:16px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;
}
.breadcrumb a{color:var(--ink-3);transition:color .2s ease-out;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#C3CEDF;}
.breadcrumb .current{color:var(--brand);font-weight:500;}

/* ---------- hero ---------- */
.hero{
  position:relative;
  background:linear-gradient(180deg,#FFFFFF 0%,var(--bg-alt) 100%);
  padding:48px 0 72px;
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;right:-40px;bottom:-40px;width:280px;height:280px;
  background-image:radial-gradient(rgba(26,92,216,.18) 1.4px,transparent 1.4px);
  background-size:14px 14px;opacity:.5;pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;position:relative;z-index:1;}
.hero-title{font-size:clamp(30px,4.2vw,48px);line-height:1.3;font-weight:700;letter-spacing:0;}
.hero-sub{margin-top:16px;font-size:17px;color:var(--ink-2);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:32px;margin-top:36px;}
.hero-stat-num{font-size:24px;font-weight:700;color:var(--teal);line-height:1.2;}
.hero-stat-label{font-size:14px;color:var(--ink-3);margin-top:2px;}
.hero-media{position:relative;}
.media-frame{
  position:relative;overflow:hidden;border-radius:var(--r-card);
  background:var(--brand-light);box-shadow:var(--sh-card);
  aspect-ratio:4/3;
}
.media-frame img{width:100%;height:100%;object-fit:cover;}
.float-card{
  position:absolute;left:-18px;bottom:-18px;
  background:#fff;border:1px solid var(--border);border-radius:14px;
  box-shadow:0 12px 28px rgba(16,42,86,.14);
  padding:14px 18px;display:flex;align-items:center;gap:12px;
}
.float-card .dot{
  width:10px;height:10px;border-radius:50%;background:var(--teal);
  box-shadow:0 0 0 4px var(--teal-light);flex:none;
}
.float-card strong{display:block;font-size:14px;font-weight:600;}
.float-card span{display:block;font-size:12px;color:var(--ink-3);}

/* ---------- sections ---------- */
.section{padding:88px 0;}
.section-alt{background:var(--bg-alt);}
.section-white{background:#fff;}
@media (max-width:1024px){.section{padding:72px 0;}}
@media (max-width:640px){.section{padding:56px 0;}}

.sec-head{display:flex;gap:14px;margin-bottom:40px;}
.sec-bar{width:4px;height:24px;border-radius:2px;background:var(--brand);margin-top:8px;flex:none;}
.sec-seal{
  display:inline-block;width:8px;height:8px;border-radius:2px;background:var(--teal);
  margin-right:8px;vertical-align:middle;
}
.sec-idx{font-size:13px;font-weight:600;color:var(--teal);letter-spacing:.06em;vertical-align:middle;}
.sec-title{font-size:clamp(24px,3vw,32px);line-height:1.35;font-weight:700;margin-top:6px;}
.sec-sub{margin-top:10px;font-size:16px;color:var(--ink-2);max-width:720px;}

/* ---------- intro ---------- */
.intro-grid{display:grid;grid-template-columns:8fr 4fr;gap:40px;align-items:start;}
.intro-text{font-size:17px;color:var(--ink-2);line-height:1.9;}
.intro-text p + p{margin-top:1em;}
.intro-panel{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-card);
}
.intro-panel h3{font-size:17px;font-weight:600;margin-bottom:14px;}
.intro-panel li{display:flex;gap:10px;font-size:14px;color:var(--ink-2);padding:8px 0;border-bottom:1px solid var(--line);}
.intro-panel li:last-child{border-bottom:0;}
.intro-panel li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal);margin-top:9px;flex:none;}

/* ---------- module cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media (max-width:1024px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:640px){.card-grid{grid-template-columns:1fr;}}
.mod-card{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh-card);overflow:hidden;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.mod-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#C9DAF5;}
.mod-thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--brand-light);}
.mod-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.mod-card:hover .mod-thumb img{transform:scale(1.04);}
.mod-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;}
.mod-body h3{font-size:18px;font-weight:600;margin-top:12px;line-height:1.5;}
.mod-body p{font-size:14px;color:var(--ink-2);margin-top:8px;line-height:1.8;}
.mod-points{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);}
.mod-points li{display:flex;gap:8px;font-size:13px;color:var(--ink-3);padding:3px 0;}
.mod-points li::before{content:"✓";color:var(--teal);font-size:12px;line-height:1.9;}

/* ---------- row list ---------- */
.row-list{border-top:1px solid var(--line);}
.row-item{
  display:grid;grid-template-columns:64px 1fr;gap:20px;
  padding:22px 0;border-bottom:1px solid var(--line);
  transition:background-color .2s ease-out;
}
.row-item:hover{background:rgba(26,92,216,.03);}
.row-no{
  width:44px;height:44px;border-radius:12px;
  background:var(--brand-light);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:15px;
}
.row-item h3{font-size:17px;font-weight:600;}
.row-item p{font-size:14px;color:var(--ink-2);margin-top:6px;}
@media (max-width:640px){
  .row-item{grid-template-columns:1fr;gap:12px;}
}

/* ---------- cross links ---------- */
.cross-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media (max-width:1024px){.cross-grid{grid-template-columns:1fr;}}
.cross-card{
  display:block;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.cross-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#C9DAF5;}
.cross-card h3{font-size:17px;font-weight:600;margin-top:12px;}
.cross-card p{font-size:14px;color:var(--ink-2);margin-top:8px;line-height:1.8;}
.cross-more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:14px;font-weight:500;color:var(--brand);}
.cross-card:hover .cross-more{gap:10px;}

/* ---------- cta band ---------- */
.cta-band{
  background:linear-gradient(135deg,var(--brand-deep) 0%,#123a86 100%);
  border-radius:var(--r-deep);
  padding:56px 48px;
  color:#fff;
  display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center;
  box-shadow:0 18px 40px rgba(15,62,158,.22);
}
.cta-band h2{font-size:clamp(22px,2.8vw,30px);font-weight:700;line-height:1.4;}
.cta-band p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.78);}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}
@media (max-width:900px){
  .cta-band{grid-template-columns:1fr;padding:40px 24px;border-radius:var(--r-card);}
  .cta-actions{justify-content:flex-start;}
}

/* ---------- faq ---------- */
.faq-list{max-width:860px;}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item.is-open{border-color:#C9DAF5;box-shadow:var(--sh-card);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:17px;font-weight:500;color:var(--ink);
  transition:color .2s ease-out;
}
.faq-item.is-open .faq-q{color:var(--brand);}
.faq-q:focus-visible{outline:2px solid var(--brand);outline-offset:-2px;}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:8px;background:var(--brand-light);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:16px;line-height:1;
}
.faq-a{
  max-height:0;overflow:hidden;padding:0 22px;
  transition:max-height .24s ease-out,padding .24s ease-out;
}
.faq-item.is-open .faq-a{max-height:360px;padding-bottom:20px;}
.faq-a p{font-size:15px;color:var(--ink-2);line-height:1.8;}

/* ---------- form ---------- */
.contact-wrap{
  display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:start;
}
.contact-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:32px;box-shadow:var(--sh-card);
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13px;color:var(--ink-3);margin-bottom:6px;}
.field input,.field select,.field textarea{
  width:100%;background:#fff;border:1px solid #D7E2F5;border-radius:var(--r-btn);
  padding:12px 14px;font-size:15px;line-height:1.6;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.field textarea{min-height:112px;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(26,92,216,.1);
}
.form-note{font-size:13px;color:var(--ink-3);margin-top:12px;}
.form-msg{margin-top:14px;font-size:14px;color:var(--success);display:none;}
.form-msg.is-visible{display:block;}
@media (max-width:900px){
  .contact-wrap{grid-template-columns:1fr;gap:24px;}
  .contact-card{padding:24px;}
}

/* ---------- footer ---------- */
.site-footer{background:#0F1B2D;color:#fff;margin-top:0;}
.site-footer .container{padding-top:64px;padding-bottom:28px;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;
  padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);box-shadow:none;}
.footer-brand .brand-text{color:#fff;font-size:16px;}
.footer-desc{font-size:14px;color:rgba(255,255,255,.72);max-width:320px;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer-col li{margin-bottom:10px;}
.footer-link{font-size:14px;color:rgba(255,255,255,.72);transition:color .2s ease-out,transform .2s ease-out;display:inline-block;}
.footer-link:hover{color:#fff;transform:translateX(2px);}
.footer-info p{font-size:14px;color:rgba(255,255,255,.72);line-height:2;}
.footer-info span{color:rgba(255,255,255,.5);font-size:13px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding-top:22px;font-size:13px;color:rgba(255,255,255,.55);
}
@media (max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:640px){
  .site-footer .container{padding-top:48px;}
  .footer-grid{grid-template-columns:1fr;}
}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:90;
  display:flex;align-items:center;gap:10px;
  padding:12px 20px;border-radius:999px;
  background:var(--brand);color:#fff;font-size:14px;font-weight:500;
  box-shadow:var(--sh-cta);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .25s ease-out;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:none;}
.float-cta:hover{background:var(--brand-deep);}
.float-cta .float-sub{display:none;color:rgba(255,255,255,.78);font-size:13px;}
.float-cta:focus-visible{outline:2px solid #fff;outline-offset:3px;}
@media (max-width:640px){
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;
    height:calc(60px + env(safe-area-inset-bottom));
    padding:0 16px calc(env(safe-area-inset-bottom)) 16px;
    justify-content:space-between;transform:translateY(100%);
  }
  .float-cta.is-visible{transform:none;}
  .float-cta .float-sub{display:inline;}
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-side{display:none;}
  .nav-toggle{display:block;}
  .header-cta{display:inline-flex;}
  .brand-text{font-size:16px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero{padding:32px 0 56px;}
  .hero-media .media-frame{aspect-ratio:16/9;max-height:200px;}
  .float-card{left:12px;bottom:-16px;}
  .intro-grid{grid-template-columns:1fr;gap:28px;}
  .hero-stats{gap:24px;}
}
@media (max-width:640px){
  .brand-text{font-size:15px;}
  .brand-mark{width:30px;height:30px;border-radius:9px;}
  .hero-stat-num{font-size:20px;}
  .sec-head{margin-bottom:28px;}
  .float-card{padding:10px 14px;}
}
@media print{
  .site-header,.float-cta,.site-footer .footer-grid{display:none !important;}
}

/* roulang page: category2 */
:root{
    --brand:#1A5CD8;
    --brand-dark:#0F3E9E;
    --brand-light:#E8F0FE;
    --teal:#12A594;
    --teal-light:#E4F6F3;
    --orange:#FF7A2F;
    --bg:#F6F8FC;
    --bg-alt:#F1F5FB;
    --white:#FFFFFF;
    --ink:#0F1B2D;
    --ink-2:#4A5A70;
    --ink-3:#8494A8;
    --border:#E4EAF4;
    --line:#EEF2F8;
    --ok:#16A34A;
    --r-card:16px;
    --r-img:12px;
    --r-btn:10px;
    --r-input:10px;
    --shadow-sm:0 4px 16px rgba(16,42,86,.06);
    --shadow-hover:0 14px 32px rgba(16,42,86,.12);
    --shadow-cta:0 10px 28px rgba(26,92,216,.28);
  }

  *,*::before,*::after{box-sizing:border-box;}

  html{scroll-behavior:smooth;scroll-padding-top:88px;}

  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }

  h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:600;letter-spacing:0;}
  p{margin:0;}
  ul,ol{margin:0;padding:0;list-style:none;}
  img{display:block;max-width:100%;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
  .num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

  a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
    outline:2px solid var(--brand);
    outline-offset:2px;
    border-radius:6px;
  }

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

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.95);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--border);
    transition:box-shadow .2s ease;
  }
  .site-header.is-scrolled{box-shadow:0 6px 20px rgba(16,42,86,.08);}
  .header-inner{
    height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  }
  .nav-side{display:flex;align-items:center;gap:26px;flex:1 1 0;min-width:0;}
  .nav-left{justify-content:flex-start;}
  .nav-right{justify-content:flex-end;}
  .nav-link{
    position:relative;
    font-size:15px;font-weight:500;color:var(--ink-2);
    padding:6px 0;white-space:nowrap;
    transition:color .2s ease;
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:-1px;width:0;height:2px;
    background:var(--brand);border-radius:2px;transform:translateX(-50%);
    transition:width .2s ease;
  }
  .nav-link:hover{color:var(--brand);}
  .nav-link:hover::after{width:16px;}
  .nav-link.is-active{color:var(--brand);font-weight:600;}
  .nav-link.is-active::after{width:16px;}

  .brand{
    display:flex;align-items:center;gap:10px;
    font-size:17px;font-weight:600;color:var(--ink);
    white-space:nowrap;flex:0 0 auto;
  }
  .brand-mark{
    display:inline-flex;align-items:center;justify-content:center;
    width:34px;height:34px;border-radius:10px;
    background:linear-gradient(140deg,var(--brand) 0%,var(--brand-dark) 100%);
    box-shadow:0 6px 16px rgba(26,92,216,.24);
  }

  .menu-toggle{
    display:none;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:10px;
    border:1px solid var(--border);background:#fff;
  }
  .menu-toggle span{
    position:relative;display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-2);
  }
  .menu-toggle span::before,.menu-toggle span::after{
    content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--ink-2);
    transition:transform .2s ease;
  }
  .menu-toggle span::before{top:-6px;}
  .menu-toggle span::after{top:6px;}
  .menu-toggle.is-open span{background:transparent;}
  .menu-toggle.is-open span::before{transform:translateY(6px) rotate(45deg);}
  .menu-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg);}

  .header-cta{
    display:none;align-items:center;
    height:38px;padding:0 16px;border-radius:var(--r-btn);
    background:var(--brand);color:#fff;font-size:14px;font-weight:500;
    box-shadow:0 6px 16px rgba(26,92,216,.24);
    transition:background .2s ease,transform .2s ease;
    white-space:nowrap;
  }
  .header-cta:hover{background:var(--brand-dark);transform:translateY(-1px);}

  .mobile-panel{
    display:none;
    border-top:1px solid var(--line);
    background:#fff;
    box-shadow:0 16px 32px rgba(16,42,86,.10);
  }
  .mobile-panel.is-open{display:block;}
  .mobile-panel .container{padding-top:8px;padding-bottom:18px;}
  .mobile-panel a{
    display:flex;align-items:center;justify-content:space-between;
    min-height:44px;padding:0 4px;
    font-size:15px;color:var(--ink-2);
    border-bottom:1px solid var(--line);
  }
  .mobile-panel a:last-of-type{border-bottom:0;}
  .mobile-panel a.is-active{color:var(--brand);font-weight:600;}
  .mobile-panel .panel-cta{
    margin-top:14px;justify-content:center;
    background:var(--brand);color:#fff;border-radius:var(--r-btn);
    font-weight:500;min-height:46px;border-bottom:0;
  }

  /* ---------- breadcrumb ---------- */
  .crumb-bar{padding:20px 0 0;}
  .crumb{
    display:flex;align-items:center;gap:8px;
    font-size:14px;color:var(--ink-3);
    overflow:hidden;white-space:nowrap;text-overflow:ellipsis;
  }
  .crumb a{color:var(--ink-3);transition:color .2s ease;}
  .crumb a:hover{color:var(--brand);}
  .crumb .sep{color:#C6D2E4;}
  .crumb .current{color:var(--brand);font-weight:500;}

  /* ---------- hero ---------- */
  .cat-hero{
    position:relative;overflow:hidden;
    padding:28px 0 84px;
    background:linear-gradient(180deg,#FFFFFF 0%,#F1F5FB 100%);
  }
  .cat-hero::after{
    content:"";position:absolute;right:-60px;bottom:-70px;width:300px;height:300px;
    background-image:radial-gradient(rgba(26,92,216,.16) 1.5px,transparent 1.5px);
    background-size:16px 16px;pointer-events:none;opacity:.75;
  }
  .cat-hero-grid{
    position:relative;z-index:1;
    display:grid;grid-template-columns:7fr 5fr;gap:52px;align-items:center;
  }
  .badge{
    display:inline-flex;align-items:center;gap:8px;
    padding:5px 12px;border-radius:999px;
    background:var(--brand-light);color:var(--brand);
    font-size:13px;font-weight:500;
  }
  .badge i{
    width:6px;height:6px;border-radius:50%;background:var(--teal);display:inline-block;
  }
  .cat-hero h1{
    margin-top:18px;
    font-size:clamp(30px,4.2vw,52px);
    font-weight:700;
    color:var(--ink);
  }
  .cat-hero .lede{
    margin-top:16px;max-width:520px;
    font-size:17px;color:var(--ink-2);
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:14px 28px;
    border-radius:var(--r-btn);
    font-size:15px;font-weight:500;line-height:1;
    transition:background .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  }
  .btn-primary{
    background:var(--brand);color:#fff;
    box-shadow:0 6px 18px rgba(26,92,216,.24);
  }
  .btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 26px rgba(26,92,216,.32);}
  .btn-primary:active{transform:translateY(0);}
  .btn-outline{
    background:#fff;color:var(--brand);
    border:1px solid #D7E2F5;
  }
  .btn-outline:hover{background:var(--brand-light);border-color:#BFD5F5;transform:translateY(-1px);}
  .btn-ghost{
    background:transparent;color:#fff;border:1px solid rgba(255,255,255,.55);
  }
  .btn-ghost:hover{background:rgba(255,255,255,.14);border-color:#fff;}
  .btn-white{
    background:#fff;color:var(--brand-dark);
    box-shadow:0 10px 28px rgba(6,26,66,.24);
  }
  .btn-white:hover{transform:translateY(-1px);box-shadow:0 16px 34px rgba(6,26,66,.3);}

  .hero-metrics{
    display:flex;flex-wrap:wrap;gap:12px 34px;margin-top:34px;
  }
  .hero-metrics li{
    display:flex;flex-direction:column;gap:2px;
    padding-left:14px;border-left:3px solid var(--teal-light);
  }
  .hero-metrics b{
    font-size:20px;font-weight:700;color:var(--teal);
    font-variant-numeric:tabular-nums;line-height:1.4;
  }
  .hero-metrics span{font-size:13px;color:var(--ink-3);}

  .hero-media{position:relative;}
  .hero-media .frame{
    position:relative;border-radius:var(--r-card);overflow:hidden;
    box-shadow:var(--shadow-hover);aspect-ratio:4/3;background:var(--brand-light);
  }
  .hero-media .frame img{width:100%;height:100%;object-fit:cover;}
  .float-card{
    position:absolute;left:-18px;bottom:22px;
    min-width:190px;padding:14px 16px;
    background:#fff;border:1px solid var(--border);border-radius:14px;
    box-shadow:var(--shadow-hover);
  }
  .float-card .k{font-size:12px;color:var(--ink-3);}
  .float-card .v{font-size:18px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;}
  .float-card .v em{font-style:normal;color:var(--teal);font-size:13px;font-weight:500;margin-left:6px;}

  /* ---------- sections ---------- */
  .section{padding:88px 0;}
  .section.is-white{background:#fff;}
  .section.is-alt{background:var(--bg-alt);}
  .section-head{margin-bottom:40px;max-width:760px;}
  .section-title{display:flex;align-items:center;gap:12px;}
  .title-mark{
    position:relative;width:4px;height:24px;border-radius:2px;background:var(--brand);flex:0 0 auto;
  }
  .title-mark::after{
    content:"";position:absolute;left:50%;bottom:-8px;width:8px;height:8px;border-radius:2px;
    background:var(--brand);transform:translateX(-50%);opacity:.85;
  }
  .section-title h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;}
  .section-head .sub{margin-top:14px;font-size:16px;color:var(--ink-2);}
  .text-arrow{
    display:inline-flex;align-items:center;gap:6px;
    font-size:15px;font-weight:500;color:var(--brand);
    transition:gap .2s ease,color .2s ease;
  }
  .text-arrow:hover{gap:10px;color:var(--brand-dark);}

  .lead-block{
    display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:start;
  }
  .lead-block .lead-quote{
    padding:26px 28px;background:#fff;border:1px solid var(--border);
    border-radius:var(--r-card);box-shadow:var(--shadow-sm);
  }
  .lead-block .lead-quote p{font-size:15px;color:var(--ink-2);}
  .lead-block .lead-quote strong{
    display:block;margin-bottom:8px;font-size:20px;color:var(--ink);font-weight:700;
  }
  .lead-body p{font-size:17px;color:var(--ink-2);}
  .lead-body p + p{margin-top:1em;}

  /* ---------- alt rows ---------- */
  .alt-list{display:flex;flex-direction:column;}
  .alt-row{
    display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;
    padding:44px 0;border-bottom:1px solid var(--line);
  }
  .alt-row:first-child{padding-top:8px;}
  .alt-row:last-child{border-bottom:0;padding-bottom:8px;}
  .alt-row:nth-child(even) .alt-media{order:2;}
  .alt-media{
    border-radius:var(--r-card);overflow:hidden;background:var(--brand-light);
    aspect-ratio:16/10;box-shadow:var(--shadow-sm);
    transition:box-shadow .25s ease,transform .25s ease;
  }
  .alt-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
  .alt-row:hover .alt-media{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
  .alt-row:hover .alt-media img{transform:scale(1.04);}
  .alt-index{
    display:inline-flex;align-items:center;gap:10px;
    font-size:13px;font-weight:600;color:var(--teal);letter-spacing:.04em;
  }
  .alt-index .chip{
    display:inline-flex;align-items:center;justify-content:center;
    width:26px;height:26px;border-radius:8px;background:var(--brand-light);color:var(--brand);
    font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;
  }
  .alt-copy h3{margin-top:14px;font-size:22px;font-weight:600;}
  .alt-copy p{margin-top:12px;font-size:16px;color:var(--ink-2);}
  .alt-points{margin-top:18px;display:flex;flex-direction:column;}
  .alt-points li{
    position:relative;padding:10px 0 10px 22px;
    font-size:15px;color:var(--ink-2);
    border-top:1px solid var(--line);
  }
  .alt-points li:first-child{border-top:0;}
  .alt-points li::before{
    content:"";position:absolute;left:0;top:19px;
    width:8px;height:8px;border-radius:50%;background:var(--teal);
  }

  /* ---------- notes ---------- */
  .note-wrap{
    background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
    padding:32px;box-shadow:var(--shadow-sm);
  }
  .note-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:24px;}
  .note-item{
    padding:0 22px;border-left:1px solid var(--line);
  }
  .note-item:first-child{padding-left:0;border-left:0;}
  .note-item:last-child{padding-right:0;}
  .note-item b{
    display:block;font-size:15px;color:var(--ink);font-weight:600;
    padding-bottom:8px;
  }
  .note-item span{font-size:14px;color:var(--ink-2);line-height:1.75;display:block;}

  /* ---------- cross links ---------- */
  .cross-list{
    display:flex;flex-direction:column;border-top:1px solid var(--border);
  }
  .cross-list li{border-bottom:1px solid var(--border);}
  .cross-list a{
    display:grid;grid-template-columns:180px 1fr auto;align-items:center;gap:20px;
    padding:20px 4px;
    transition:background .2s ease,padding .2s ease;
  }
  .cross-list a:hover{background:#fff;padding-left:12px;}
  .cross-name{font-size:17px;font-weight:600;color:var(--ink);}
  .cross-list a:hover .cross-name{color:var(--brand);}
  .cross-desc{font-size:14px;color:var(--ink-3);}
  .cross-go{
    display:inline-flex;align-items:center;gap:6px;
    font-size:14px;font-weight:500;color:var(--brand);
    transition:gap .2s ease;
  }
  .cross-list a:hover .cross-go{gap:10px;}

  /* ---------- faq ---------- */
  .faq-list{max-width:900px;}
  .faq-item{
    background:#fff;border:1px solid var(--border);border-radius:14px;
    margin-bottom:12px;overflow:hidden;
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq-item[open]{border-color:#C9DAF5;box-shadow:var(--shadow-sm);}
  .faq-q{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;font-size:17px;font-weight:500;color:var(--ink);
    cursor:pointer;list-style:none;
  }
  .faq-q::-webkit-details-marker{display:none;}
  .faq-item[open] .faq-q{color:var(--brand);}
  .faq-icon{position:relative;flex:0 0 20px;width:20px;height:20px;color:currentColor;}
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px;
    transition:transform .24s ease,opacity .24s ease;
  }
  .faq-icon::before{width:12px;height:2px;transform:translate(-50%,-50%);}
  .faq-icon::after{width:2px;height:12px;transform:translate(-50%,-50%);}
  .faq-item[open] .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
  .faq-a{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--ink-2);}

  /* ---------- final cta ---------- */
  .final-wrap{padding:0 0 96px;}
  .final-cta{
    position:relative;overflow:hidden;border-radius:24px;
    background:var(--brand-dark);
    padding:56px 52px;color:#fff;
  }
  .final-cta::before{
    content:"";position:absolute;inset:0;
    background-image:linear-gradient(90deg,rgba(15,62,158,.94) 0%,rgba(15,62,158,.78) 52%,rgba(15,62,158,.42) 100%);
    pointer-events:none;
  }
  .final-cta .final-inner{position:relative;z-index:1;max-width:640px;}
  .final-cta h2{font-size:clamp(24px,2.8vw,34px);font-weight:700;color:#fff;}
  .final-cta p{margin-top:14px;font-size:16px;color:rgba(255,255,255,.78);}
  .final-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}

  /* ---------- floating cta ---------- */
  .floating-cta{
    position:fixed;right:24px;bottom:28px;z-index:70;
    opacity:0;visibility:hidden;transform:translateY(14px);
    transition:opacity .3s ease,transform .3s ease,visibility .3s ease;
  }
  .floating-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
  .floating-cta .fab{
    display:inline-flex;align-items:center;gap:10px;
    height:52px;padding:0 24px;border-radius:999px;
    background:var(--brand);color:#fff;font-size:15px;font-weight:500;
    box-shadow:var(--shadow-cta);
    transition:background .2s ease,transform .2s ease;
  }
  .floating-cta .fab:hover{background:var(--brand-dark);transform:translateY(-2px);}
  .fab-bar{
    display:none;
  }

  /* ---------- footer ---------- */
  .site-footer{
    background:#0F1B2D;color:rgba(255,255,255,.72);
    border-top:1px solid rgba(255,255,255,.08);
  }
  .site-footer .container{padding-top:64px;padding-bottom:28px;}
  .footer-grid{
    display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
    padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.08);
  }
  .footer-brand{display:flex;align-items:center;gap:10px;}
  .footer-brand .brand-text{color:#fff;font-size:17px;font-weight:600;}
  .footer-desc{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px;}
  .footer-col h4{
    font-size:15px;font-weight:600;color:#fff;margin-bottom:18px;
  }
  .footer-col ul li + li{margin-top:12px;}
  .footer-link{
    display:inline-block;font-size:14px;color:rgba(255,255,255,.72);
    transition:color .2s ease,transform .2s ease;
  }
  .footer-link:hover{color:#fff;transform:translateX(2px);}
  .footer-info p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.72);}
  .footer-info span{display:block;margin-top:8px;font-size:13px;color:rgba(255,255,255,.52);}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
    padding-top:24px;font-size:13px;color:rgba(255,255,255,.52);
  }

  /* ---------- responsive ---------- */
  @media (max-width:1023px){
    .nav-side{display:none;}
    .menu-toggle{display:inline-flex;order:1;}
    .brand{order:2;margin:0 auto;font-size:16px;}
    .header-cta{display:inline-flex;order:3;}
    .header-inner{height:64px;}
    .cat-hero{padding:24px 0 64px;}
    .cat-hero-grid{grid-template-columns:1fr;gap:34px;}
    .hero-media .frame{aspect-ratio:16/9;max-height:220px;}
    .float-card{left:auto;right:14px;bottom:14px;min-width:150px;padding:10px 12px;}
    .lead-block{grid-template-columns:1fr;gap:26px;}
    .section{padding:72px 0;}
    .note-grid{grid-template-columns:1fr 1fr;gap:24px 0;}
    .note-item{padding:0 18px;}
    .note-item:nth-child(odd){padding-left:0;border-left:0;}
    .cross-list a{grid-template-columns:1fr auto;gap:8px 16px;}
    .cross-desc{grid-column:1 / -1;order:3;}
    .cross-go{order:2;}
    .final-cta{padding:44px 32px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
    .footer-desc{max-width:none;}
  }

  @media (max-width:767px){
    .container{padding:0 16px;}
    .section{padding:56px 0;}
    .section-head{margin-bottom:30px;}
    .alt-row{grid-template-columns:1fr;gap:22px;padding:32px 0;}
    .alt-row:nth-child(even) .alt-media{order:0;}
    .alt-media{aspect-ratio:16/10;}
    .hero-metrics{gap:14px 24px;}
    .hero-metrics li{padding-left:10px;}
    .hero-metrics b{font-size:17px;}
    .btn{min-height:44px;padding:12px 20px;font-size:14px;}
    .note-grid{grid-template-columns:1fr;gap:18px;}
    .note-item{padding:0;border-left:0;}
    .note-item + .note-item{border-top:1px solid var(--line);padding-top:16px;}
    .note-wrap{padding:24px 20px;}
    .faq-q{font-size:16px;padding:16px 18px;}
    .faq-a{padding:0 18px 18px;}
    .final-cta{padding:34px 22px;border-radius:20px;}
    .final-actions .btn{width:100%;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;gap:8px;}

    .floating-cta{
      left:0;right:0;bottom:0;padding:0;transform:translateY(120%);
    }
    .floating-cta.is-visible{transform:translateY(0);}
    .floating-cta .fab{display:none;}
    .fab-bar{
      display:flex;align-items:center;justify-content:space-between;gap:12px;
      width:100%;height:60px;padding:0 16px calc(0px + env(safe-area-inset-bottom));
      background:#fff;border-top:1px solid var(--border);
      box-shadow:0 -6px 20px rgba(16,42,86,.1);
    }
    .fab-bar .fab-main{
      display:inline-flex;align-items:center;justify-content:center;
      flex:1 1 auto;height:42px;border-radius:var(--r-btn);
      background:var(--brand);color:#fff;font-size:15px;font-weight:500;
    }
    .fab-bar .fab-sub{font-size:14px;color:var(--ink-2);white-space:nowrap;}
    body{padding-bottom:60px;}
  }

  @media print{
    .site-header,.floating-cta,.site-footer,.final-cta,.hero-actions{display:none !important;}
    body{background:#fff;}
  }

/* roulang page: category4 */
:root{
    --brand:#1A5CD8;
    --brand-deep:#0F3E9E;
    --brand-soft:#E8F0FE;
    --teal:#12A594;
    --teal-soft:#E4F6F3;
    --orange:#FF7A2F;
    --bg:#F6F8FC;
    --surface:#FFFFFF;
    --surface-alt:#F1F5FB;
    --dark:#0F1B2D;
    --text:#0F1B2D;
    --text-2:#4A5A70;
    --text-3:#8494A8;
    --border:#E4EAF4;
    --divider:#EEF2F8;
    --success:#16A34A;
    --warning:#E5484D;
    --r-card:16px;
    --r-img:12px;
    --r-btn:10px;
    --r-dark:24px;
    --sh-1:0 4px 16px rgba(16,42,86,.06);
    --sh-2:0 14px 32px rgba(16,42,86,.12);
    --sh-cta:0 10px 28px rgba(26,92,216,.28);
    --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  }

  html{scroll-behavior:smooth;scroll-padding-top:88px;-webkit-text-size-adjust:100%;}
  html body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:var(--font-cn);
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
    font-variant-numeric:tabular-nums;
  }
  img{max-width:100%;display:block;object-fit:cover;}
  a{text-decoration:none;color:inherit;}
  button{font-family:inherit;cursor:pointer;border:0;background:none;}
  ul,ol{list-style:none;margin:0;padding:0;}
  h1,h2,h3,h4,p{margin:0;}

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

  a:focus-visible,button:focus-visible,input:focus-visible{
    outline:2px solid var(--brand);
    outline-offset:2px;
    border-radius:6px;
  }

  /* ---------- Header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.94);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--divider);
    transition:box-shadow .2s ease-out;
  }
  .site-header.is-scrolled{box-shadow:0 6px 20px rgba(16,42,86,.08);}
  .header-inner{
    position:relative;
    display:flex;align-items:center;gap:24px;
    height:70px;
  }
  .nav-side{display:flex;align-items:center;gap:26px;flex:1 1 0;min-width:0;}
  .nav-right{justify-content:flex-end;}
  .nav-link{
    position:relative;
    font-size:15px;font-weight:500;color:var(--text-2);
    padding:6px 2px;white-space:nowrap;
    transition:color .2s ease-out;
  }
  .nav-link::after{
    content:"";position:absolute;left:0;bottom:-2px;width:16px;height:2px;
    background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:left;
    transition:transform .2s ease-out;
  }
  .nav-link:hover{color:var(--brand);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.is-active{color:var(--brand);font-weight:600;}
  .nav-link.is-active::after{transform:scaleX(1);}
  .nav-cta{
    display:inline-flex;align-items:center;justify-content:center;
    min-height:38px;padding:0 18px;border-radius:var(--r-btn);
    background:var(--brand);color:#fff;font-size:14px;font-weight:600;
    box-shadow:0 6px 18px rgba(26,92,216,.24);
    transition:background .2s ease-out,transform .2s ease-out;
  }
  .nav-cta:hover{background:var(--brand-deep);transform:translateY(-1px);}

  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
  .brand-mark{
    width:34px;height:34px;border-radius:10px;background:var(--brand);
    display:inline-flex;align-items:center;justify-content:center;
    box-shadow:0 6px 16px rgba(26,92,216,.28);
  }
  .brand-text{font-size:18px;font-weight:700;color:var(--text);letter-spacing:0;white-space:nowrap;}

  .menu-toggle{
    display:none;width:44px;height:44px;border-radius:10px;
    align-items:center;justify-content:center;border:1px solid var(--border);
    background:#fff;color:var(--text-2);
  }
  .header-cta-sm{display:none;}
  .mobile-panel{display:none;}

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:14px 28px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;line-height:1;
    transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out,
               transform .2s ease-out,box-shadow .2s ease-out;
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(26,92,216,.24);}
  .btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:0 10px 26px rgba(26,92,216,.32);}
  .btn-primary:active{transform:translateY(1px);}
  .btn-ghost-line{background:#fff;color:var(--brand);border:1px solid #D7E2F5;}
  .btn-ghost-line:hover{background:var(--brand-soft);border-color:#B9CEF0;}
  .btn-dark-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.55);}
  .btn-dark-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;}
  .btn-sm{min-height:38px;padding:10px 18px;font-size:14px;}

  /* ---------- Section base ---------- */
  .section{padding:88px 0;}
  .section-alt{background:var(--surface-alt);}
  .section-white{background:var(--surface);}
  .section-head{margin-bottom:40px;}
  .section-head-row{
    display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
    margin-bottom:40px;flex-wrap:wrap;
  }
  .section-title-wrap{display:flex;align-items:center;gap:12px;}
  .section-title-wrap::before{
    content:"";width:4px;height:24px;border-radius:2px;background:var(--brand);flex:0 0 auto;
  }
  .section-mark{width:8px;height:8px;border-radius:2px;background:var(--brand);flex:0 0 auto;}
  .section-title{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.3;color:var(--text);}
  .section-desc{margin-top:14px;font-size:16px;color:var(--text-2);max-width:760px;}
  .section-more{
    display:inline-flex;align-items:center;gap:6px;
    font-size:15px;font-weight:500;color:var(--brand);
    transition:gap .2s ease-out,color .2s ease-out;
  }
  .section-more:hover{gap:10px;color:var(--brand-deep);}

  /* ---------- Breadcrumb ---------- */
  .breadcrumb{
    font-size:14px;color:var(--text-3);
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    padding-top:28px;
  }
  .breadcrumb a{color:var(--text-3);transition:color .2s ease-out;}
  .breadcrumb a:hover{color:var(--brand);}
  .breadcrumb .sep{color:#C4D0E2;}
  .breadcrumb .current{color:var(--brand);font-weight:500;}

  /* ---------- Hero ---------- */
  .hero{
    background:linear-gradient(180deg,#FFFFFF 0%,#F1F5FB 100%);
    position:relative;overflow:hidden;
    padding:64px 0 80px;
  }
  .hero::after{
    content:"";position:absolute;right:-40px;bottom:-40px;width:280px;height:280px;
    background-image:radial-gradient(rgba(26,92,216,.28) 1.4px,transparent 1.4px);
    background-size:16px 16px;opacity:.4;pointer-events:none;
  }
  .hero-grid{
    display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;
    position:relative;z-index:1;
  }
  .hero-badge{
    display:inline-flex;align-items:center;gap:8px;
    padding:4px 12px;border-radius:999px;
    background:var(--brand-soft);color:var(--brand);
    font-size:13px;font-weight:600;
  }
  .hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--teal);}
  .hero-title{
    margin-top:20px;
    font-size:clamp(30px,4vw,46px);
    font-weight:700;line-height:1.28;color:var(--text);
  }
  .hero-title em{font-style:normal;color:var(--brand);}
  .hero-sub{margin-top:18px;font-size:17px;color:var(--text-2);max-width:560px;}
  .hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px;}
  .hero-stats{
    margin-top:36px;display:flex;flex-wrap:wrap;gap:36px;
    padding-top:24px;border-top:1px solid var(--border);
  }
  .hero-stat-num{font-size:24px;font-weight:700;color:var(--teal);line-height:1.2;}
  .hero-stat-label{margin-top:4px;font-size:14px;color:var(--text-3);}
  .hero-media{position:relative;}
  .hero-media-frame{
    border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-2);
    background:var(--surface-alt);aspect-ratio:16 / 11;
  }
  .hero-media-frame img{width:100%;height:100%;}
  .hero-float-card{
    position:absolute;left:-18px;bottom:-22px;
    background:#fff;border:1px solid var(--border);border-radius:14px;
    padding:14px 18px;box-shadow:var(--sh-2);
    display:flex;align-items:center;gap:12px;min-width:210px;
  }
  .hero-float-icon{
    width:36px;height:36px;border-radius:10px;background:var(--teal-soft);
    display:flex;align-items:center;justify-content:center;color:var(--teal);flex:0 0 auto;
  }
  .hero-float-title{font-size:14px;font-weight:600;color:var(--text);}
  .hero-float-desc{font-size:13px;color:var(--text-3);}

  /* ---------- Intro ---------- */
  .intro-block{max-width:820px;}
  .intro-text{font-size:17px;color:var(--text-2);}
  .intro-points{
    margin-top:28px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;
  }
  .intro-point{
    background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
    padding:20px;box-shadow:var(--sh-1);
  }
  .intro-point h3{font-size:17px;font-weight:600;color:var(--text);}
  .intro-point p{margin-top:8px;font-size:14px;color:var(--text-2);}

  /* ---------- Big image + two columns ---------- */
  .feature-image{
    border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
    background:var(--surface-alt);aspect-ratio:16 / 7;
  }
  .feature-image img{width:100%;height:100%;}
  .two-col-list{
    margin-top:40px;
    display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
    gap:0 48px;
  }
  .two-col-item{
    display:flex;gap:16px;padding:22px 0;border-bottom:1px solid var(--divider);
  }
  .two-col-num{
    width:34px;height:34px;flex:0 0 auto;border-radius:8px;
    background:var(--brand);color:#fff;font-size:14px;font-weight:700;
    display:flex;align-items:center;justify-content:center;
  }
  .two-col-item h3{font-size:17px;font-weight:600;color:var(--text);}
  .two-col-item p{margin-top:6px;font-size:14px;color:var(--text-2);}

  /* ---------- Dark proof ---------- */
  .proof-section{
    background:var(--brand-deep);color:#fff;border-radius:var(--r-dark);
    padding:56px 48px;margin:0 24px;max-width:1200px;
  }
  .proof-inner{max-width:1200px;margin:0 auto;}
  .proof-title{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.35;}
  .proof-sub{margin-top:12px;font-size:15px;color:rgba(255,255,255,.78);max-width:720px;}
  .proof-metrics{
    margin-top:36px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;
    padding:28px 0;border-top:1px solid rgba(255,255,255,.16);
    border-bottom:1px solid rgba(255,255,255,.16);
  }
  .proof-num{font-size:36px;font-weight:700;color:#7FE3D6;line-height:1.1;}
  .proof-num span{font-size:16px;font-weight:500;color:#fff;margin-left:4px;}
  .proof-label{margin-top:8px;font-size:14px;color:rgba(255,255,255,.72);}
  .proof-notes{margin-top:26px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 32px;}
  .proof-notes li{
    font-size:14px;color:rgba(255,255,255,.8);
    padding-left:16px;position:relative;
  }
  .proof-notes li::before{
    content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;
    background:#7FE3D6;
  }

  /* ---------- Checklist rows ---------- */
  .check-list{border-top:1px solid var(--border);}
  .check-row{
    display:flex;gap:18px;align-items:flex-start;
    padding:18px 0;border-bottom:1px solid var(--divider);
  }
  .check-dot{
    width:26px;height:26px;border-radius:50%;flex:0 0 auto;
    background:var(--teal-soft);color:var(--teal);font-size:13px;font-weight:700;
    display:flex;align-items:center;justify-content:center;
  }
  .check-row h3{font-size:17px;font-weight:600;color:var(--text);}
  .check-row p{margin-top:4px;font-size:14px;color:var(--text-2);}
  .check-tag{
    display:inline-block;margin-left:8px;padding:2px 10px;border-radius:999px;
    background:var(--teal-soft);color:var(--teal);font-size:12px;font-weight:600;
    vertical-align:middle;
  }

  /* ---------- Cross links ---------- */
  .cross-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
  .cross-card{
    background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
    box-shadow:var(--sh-1);overflow:hidden;
    display:flex;flex-direction:column;
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .cross-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#C9DAF5;}
  .cross-thumb{aspect-ratio:16 / 9;overflow:hidden;background:var(--surface-alt);}
  .cross-thumb img{width:100%;height:100%;transition:transform .3s ease-out;}
  .cross-card:hover .cross-thumb img{transform:scale(1.04);}
  .cross-body{padding:20px 22px 24px;}
  .cross-body h3{font-size:17px;font-weight:600;color:var(--text);}
  .cross-body p{margin-top:8px;font-size:14px;color:var(--text-2);}
  .cross-more{
    margin-top:14px;display:inline-flex;align-items:center;gap:6px;
    font-size:14px;font-weight:600;color:var(--brand);
    transition:gap .2s ease-out;
  }
  .cross-card:hover .cross-more{gap:10px;}

  /* ---------- FAQ ---------- */
  .faq-wrap{max-width:880px;}
  .faq-item{
    background:#fff;border:1px solid var(--border);border-radius:14px;
    margin-bottom:12px;overflow:hidden;
    transition:border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .faq-item.is-open{border-color:#C9DAF5;box-shadow:var(--sh-1);}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;text-align:left;
    font-size:17px;font-weight:500;color:var(--text);
    transition:color .2s ease-out;
  }
  .faq-q::after{
    content:"+";font-size:22px;font-weight:400;color:var(--brand);line-height:1;
    flex:0 0 auto;transition:transform .24s ease-out;
  }
  .faq-item.is-open .faq-q{color:var(--brand);}
  .faq-item.is-open .faq-q::after{transform:rotate(45deg);}
  .faq-a{
    max-height:0;overflow:hidden;
    transition:max-height .24s ease-out;
  }
  .faq-a-inner{padding:0 22px 20px;font-size:15px;color:var(--text-2);line-height:1.8;}

  /* ---------- CTA ---------- */
  .cta-band{
    position:relative;border-radius:var(--r-dark);overflow:hidden;
    background:var(--brand-deep);
  }
  .cta-band img.cta-bg{
    position:absolute;inset:0;width:100%;height:100%;opacity:.28;
  }
  .cta-inner{
    position:relative;z-index:1;
    padding:64px 48px;display:flex;align-items:center;justify-content:space-between;
    gap:40px;flex-wrap:wrap;
  }
  .cta-title{font-size:clamp(24px,3vw,32px);font-weight:700;color:#fff;line-height:1.3;}
  .cta-desc{margin-top:12px;font-size:16px;color:rgba(255,255,255,.8);max-width:560px;}
  .cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

  /* ---------- Footer ---------- */
  .site-footer{
    background:var(--brand-deep);color:#fff;margin-top:0;
    padding:64px 0 28px;
  }
  .footer-grid{
    display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;
    padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.16);
  }
  .footer-brand{display:flex;align-items:center;gap:10px;}
  .footer-brand .brand-mark{background:rgba(255,255,255,.16);box-shadow:none;}
  .footer-brand .brand-text{color:#fff;font-size:17px;font-weight:700;}
  .footer-desc{margin-top:16px;font-size:14px;color:rgba(255,255,255,.72);max-width:320px;line-height:1.8;}
  .footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
  .footer-col li{margin-bottom:10px;}
  .footer-link{
    font-size:14px;color:rgba(255,255,255,.72);
    display:inline-block;transition:color .2s ease-out,transform .2s ease-out;
  }
  .footer-link:hover{color:#fff;transform:translateX(2px);}
  .footer-info p{font-size:14px;color:rgba(255,255,255,.72);line-height:1.9;}
  .footer-info span{color:rgba(255,255,255,.55);font-size:13px;}
  .footer-bottom{
    padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:rgba(255,255,255,.6);
  }

  /* ---------- Floating CTA ---------- */
  .float-cta{
    position:fixed;right:28px;bottom:28px;z-index:70;
    display:flex;align-items:center;gap:10px;
    padding:14px 24px;border-radius:999px;
    background:var(--brand);color:#fff;font-size:15px;font-weight:600;
    box-shadow:var(--sh-cta);
    opacity:0;visibility:hidden;transform:translateY(12px);
    transition:opacity .28s ease-out,transform .28s ease-out,visibility .28s ease-out,background .2s ease-out;
  }
  .float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
  .float-cta:hover{background:var(--brand-deep);transform:translateY(-2px);}

  /* ---------- Responsive ---------- */
  @media (max-width:1023px){
    .nav-side{display:none;}
    .header-inner{justify-content:space-between;gap:12px;}
    .brand{position:absolute;left:50%;transform:translateX(-50%);}
    .menu-toggle{display:inline-flex;}
    .header-cta-sm{
      display:inline-flex;align-items:center;justify-content:center;
      min-height:38px;padding:0 16px;border-radius:var(--r-btn);
      background:var(--brand);color:#fff;font-size:14px;font-weight:600;
    }
    .mobile-panel{
      display:none;border-top:1px solid var(--divider);background:#fff;
      padding:12px 24px 20px;
    }
    .mobile-panel.is-open{display:block;}
    .mobile-link{
      display:flex;align-items:center;min-height:44px;
      font-size:15px;color:var(--text-2);border-bottom:1px solid var(--divider);
    }
    .mobile-link.is-active{color:var(--brand);font-weight:600;}
    .mobile-cta{margin-top:16px;width:100%;}
    .hero{padding:44px 0 64px;}
    .hero-grid{grid-template-columns:1fr;gap:40px;}
    .hero-media-frame{aspect-ratio:16 / 9;max-height:240px;}
    .hero-float-card{left:auto;right:12px;bottom:-18px;min-width:180px;padding:12px 14px;}
    .proof-section{padding:44px 28px;margin:0 16px;}
    .proof-metrics{grid-template-columns:repeat(2,minmax(0,1fr));}
    .proof-notes{grid-template-columns:1fr;}
    .cross-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  }

  @media (max-width:767px){
    .container{padding:0 16px;}
    .section{padding:56px 0;}
    .section-head-row{align-items:flex-start;}
    .intro-points{grid-template-columns:1fr;}
    .two-col-list{grid-template-columns:1fr;gap:0;}
    .feature-image{aspect-ratio:16 / 9;}
    .hero-stats{gap:24px;}
    .hero-stat-num{font-size:20px;}
    .cta-inner{padding:40px 24px;}
    .proof-section{margin:0 12px;padding:36px 20px;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;gap:8px;}
    .float-cta{
      left:0;right:0;bottom:0;border-radius:0;
      justify-content:center;padding:14px 16px 12px;
      padding-bottom:calc(14px + env(safe-area-inset-bottom));
      font-size:15px;
    }
    .float-cta:hover{transform:none;}
    .btn{padding:12px 20px;}
    .faq-q{padding:16px 18px;font-size:16px;}
    .faq-a-inner{padding:0 18px 18px;}
  }

  @media (max-width:520px){
    .hero-actions{flex-direction:column;align-items:stretch;}
    .hero-actions .btn{width:100%;}
    .cross-grid{grid-template-columns:1fr;}
    .brand-text{font-size:16px;}
    .cta-actions{width:100%;}
    .cta-actions .btn{width:100%;}
  }

  @media print{
    .site-header,.float-cta,.mobile-panel{display:none !important;}
    .site-footer{padding:16px 0;background:#fff;color:#000;}
    .footer-col,.footer-bottom{display:none;}
  }

/* roulang page: category3 */
:root{
    --brand:#1A5CD8;
    --brand-deep:#0F3E9E;
    --brand-soft:#E8F0FE;
    --teal:#12A594;
    --teal-soft:#E4F6F3;
    --orange:#FF7A2F;
    --bg:#F6F8FC;
    --bg-alt:#F1F5FB;
    --ink:#0F1B2D;
    --ink-2:#4A5A70;
    --ink-3:#8494A8;
    --border:#E4EAF4;
    --line:#EEF2F8;
    --r-card:16px;
    --r-img:12px;
    --r-btn:10px;
    --r-input:10px;
    --r-block:24px;
    --sh-card:0 4px 16px rgba(16,42,86,.06);
    --sh-card-h:0 14px 32px rgba(16,42,86,.12);
    --sh-cta:0 10px 28px rgba(26,92,216,.28);
    --sh-btn:0 6px 18px rgba(26,92,216,.24);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;scroll-padding-top:88px;}
  html body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.8;
    color:var(--ink);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  html body img{display:block;max-width:100%;}
  html body a{color:inherit;text-decoration:none;}
  html body ul,html body ol{margin:0;padding:0;list-style:none;}
  html body h1,html body h2,html body h3,html body h4{margin:0;line-height:1.3;font-weight:700;}
  html body p{margin:0;}
  html body button{font-family:inherit;cursor:pointer;}

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

  a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
    outline:2px solid var(--brand);outline-offset:2px;
  }

  /* ---------- 顶部导航 ---------- */
  html body .site-header{
    position:fixed;top:0;left:0;right:0;z-index:60;
    background:rgba(255,255,255,.94);
    -webkit-backdrop-filter:saturate(180%) blur(12px);
    backdrop-filter:saturate(180%) blur(12px);
    border-bottom:1px solid var(--border);
    transition:box-shadow .2s ease-out,background .2s ease-out;
  }
  html body .site-header.is-scrolled{box-shadow:0 6px 20px rgba(16,42,86,.08);background:#fff;}
  .header-inner{
    display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
    gap:16px;height:70px;position:relative;
  }
  .nav-side{display:flex;align-items:center;gap:26px;}
  .nav-left{justify-content:flex-start;}
  .nav-right{justify-content:flex-end;}
  .nav-link{
    position:relative;display:inline-block;padding:8px 2px;
    font-size:15px;font-weight:500;color:var(--ink-2);
    transition:color .2s ease-out;
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:0;height:2px;width:0;
    background:var(--brand);border-radius:2px;
    transform:translateX(-50%);transition:width .2s ease-out;
  }
  .nav-link:hover{color:var(--brand);}
  .nav-link:hover::after{width:16px;}
  .nav-link.is-active{color:var(--brand);}
  .nav-link.is-active::after{width:16px;}

  .brand{display:flex;align-items:center;gap:10px;justify-self:center;}
  .brand-mark{
    width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,#2F79F0,var(--brand-deep));
    box-shadow:0 6px 16px rgba(26,92,216,.28);
  }
  .brand-text{font-size:18px;font-weight:700;color:var(--ink);white-space:nowrap;}

  .nav-toggle{
    display:none;width:44px;height:44px;border:1px solid var(--border);border-radius:12px;
    background:#fff;align-items:center;justify-content:center;
  }
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;}
  .nav-toggle span::before,.nav-toggle span::after{
    content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
  }
  .nav-toggle span::before{top:-6px;}
  .nav-toggle span::after{top:6px;}

  .nav-cta-mobile{
    display:none;align-items:center;justify-content:center;height:38px;padding:0 14px;
    background:var(--brand);color:#fff;font-size:14px;font-weight:600;border-radius:10px;
    box-shadow:var(--sh-btn);white-space:nowrap;
  }
  .mobile-panel{
    display:none;max-height:0;overflow:hidden;background:#fff;
    border-top:1px solid transparent;transition:max-height .28s ease-out,border-color .28s ease-out;
  }
  .mobile-panel.is-open{max-height:560px;border-top-color:var(--border);}
  .mobile-panel-inner{padding:14px 16px 22px;display:flex;flex-direction:column;gap:2px;}
  .mobile-panel a{
    display:flex;align-items:center;min-height:44px;padding:0 12px;border-radius:10px;
    font-size:15px;color:var(--ink-2);font-weight:500;
  }
  .mobile-panel a:hover{background:var(--brand-soft);color:var(--brand);}
  .mobile-panel a.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600;}
  .mobile-panel .mobile-cta{
    margin-top:10px;justify-content:center;background:var(--brand);color:#fff;font-weight:600;
    box-shadow:var(--sh-btn);
  }
  .mobile-panel .mobile-cta:hover{background:var(--brand-deep);color:#fff;}

  @media (max-width:1023px){
    .header-inner{display:flex;justify-content:center;align-items:center;height:62px;}
    .nav-side{display:none;}
    .nav-toggle{display:inline-flex;position:absolute;left:0;top:50%;transform:translateY(-50%);}
    .nav-cta-mobile{display:inline-flex;position:absolute;right:0;top:50%;transform:translateY(-50%);}
    .mobile-panel{display:block;}
  }
  @media (max-width:640px){
    .brand-text{font-size:16px;}
    .brand-mark{width:30px;height:30px;border-radius:9px;}
  }

  /* ---------- 通用板块 ---------- */
  .section{padding:96px 0;}
  .section-white{background:#fff;}
  .section-alt{background:var(--bg-alt);}
  .sec-head{margin-bottom:40px;max-width:780px;}
  .sec-eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:600;color:var(--brand);
    background:var(--brand-soft);padding:4px 12px;border-radius:999px;margin-bottom:14px;
  }
  .sec-eyebrow::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--brand);}
  .sec-title{
    position:relative;padding-left:18px;
    font-size:clamp(24px,2.6vw,34px);font-weight:700;color:var(--ink);
  }
  .sec-title::before{
    content:"";position:absolute;left:0;top:.3em;width:4px;height:24px;border-radius:2px;background:var(--brand);
  }
  .sec-lead{margin-top:14px;color:var(--ink-2);font-size:16px;max-width:720px;}

  /* ---------- 面包屑 ---------- */
  .breadcrumb{
    display:flex;align-items:center;gap:10px;flex-wrap:nowrap;overflow:hidden;
    font-size:14px;color:var(--ink-3);margin-bottom:16px;white-space:nowrap;
  }
  .breadcrumb a{color:var(--ink-3);transition:color .2s ease-out;}
  .breadcrumb a:hover{color:var(--brand);}
  .bc-sep{color:#C9D3E4;}
  .bc-current{color:var(--brand);font-weight:500;overflow:hidden;text-overflow:ellipsis;}

  /* ---------- Hero ---------- */
  .page-hero{
    position:relative;overflow:hidden;
    padding:126px 0 64px;
    background:linear-gradient(180deg,#FFFFFF 0%,var(--bg-alt) 100%);
    border-bottom:1px solid var(--line);
  }
  .page-hero::after{
    content:"";position:absolute;right:-60px;bottom:-60px;width:300px;height:300px;
    background-image:radial-gradient(rgba(26,92,216,.18) 1.5px,transparent 1.5px);
    background-size:14px 14px;pointer-events:none;opacity:.75;
  }
  .hero-grid{
    display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;position:relative;z-index:1;
  }
  .hero-badge{
    display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
    color:var(--brand);background:#fff;border:1px solid #D7E2F5;
    padding:5px 14px;border-radius:999px;box-shadow:var(--sh-card);margin-bottom:18px;
  }
  .hero-badge i{width:8px;height:8px;border-radius:50%;background:var(--teal);display:inline-block;}
  .hero-title{
    font-size:clamp(30px,4vw,46px);font-weight:700;letter-spacing:0;line-height:1.2;color:var(--ink);
  }
  .hero-sub{margin-top:16px;font-size:17px;color:var(--ink-2);max-width:560px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
  .hero-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:34px;}
  .hero-stats li{display:flex;flex-direction:column;gap:2px;}
  .hero-stats strong{font-size:20px;font-weight:700;color:var(--teal);line-height:1.3;font-variant-numeric:tabular-nums;}
  .hero-stats span{font-size:13px;color:var(--ink-3);}

  .hero-visual{position:relative;}
  .hero-visual img{
    width:100%;aspect-ratio:16/11;object-fit:cover;
    border-radius:var(--r-card);background:var(--bg-alt);
    box-shadow:0 14px 32px rgba(16,42,86,.12);
  }
  .float-card{
    position:absolute;left:-22px;bottom:-24px;max-width:300px;
    display:flex;gap:10px;align-items:flex-start;
    background:#fff;border:1px solid var(--border);border-radius:14px;
    padding:14px 16px;box-shadow:var(--sh-card-h);
  }
  .float-dot{
    flex:none;width:10px;height:10px;border-radius:50%;background:var(--teal);margin-top:8px;
    box-shadow:0 0 0 4px rgba(18,165,148,.16);
  }
  .float-card strong{display:block;font-size:14px;color:var(--ink);font-weight:600;}
  .float-card span{display:block;font-size:13px;color:var(--ink-3);line-height:1.6;}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:14px 28px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
    transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
  }
  .btn:active{transform:translateY(1px);}
  .btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-btn);}
  .btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:0 10px 26px rgba(26,92,216,.34);}
  .btn-ghost{background:#fff;color:var(--brand);border-color:#D7E2F5;}
  .btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand);transform:translateY(-1px);}
  .btn-on-dark{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
  .btn-on-dark:hover{background:rgba(255,255,255,.14);border-color:#fff;transform:translateY(-1px);}
  .btn-sm{min-height:40px;padding:11px 20px;font-size:14px;}

  .text-link{
    display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);
    transition:gap .2s ease-out,color .2s ease-out;
  }
  .text-link:hover{gap:10px;color:var(--brand-deep);}

  /* ---------- 介绍区 ---------- */
  .intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
  .intro-copy p{color:var(--ink-2);margin-top:16px;}
  .mini-list{margin-top:24px;display:flex;flex-direction:column;gap:12px;}
  .mini-list li{display:flex;align-items:center;gap:10px;font-size:15px;color:var(--ink-2);}
  .mini-list .dot{
    flex:none;width:8px;height:8px;border-radius:50%;background:var(--teal);
    box-shadow:0 0 0 4px rgba(18,165,148,.14);
  }
  .intro-media img{
    width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);
    background:var(--bg-alt);box-shadow:var(--sh-card-h);
  }

  /* ---------- 时间轴 ---------- */
  .timeline{position:relative;margin-top:8px;}
  .timeline::before{
    content:"";position:absolute;left:23px;top:14px;bottom:14px;width:2px;
    background:linear-gradient(180deg,var(--teal),rgba(18,165,148,.12));
  }
  .tl-item{position:relative;padding:0 0 24px 76px;}
  .tl-item:last-child{padding-bottom:0;}
  .tl-node{
    position:absolute;left:0;top:0;width:48px;height:48px;border-radius:14px;
    display:flex;align-items:center;justify-content:center;
    background:#fff;border:1px solid var(--border);box-shadow:var(--sh-card);
    font-size:15px;font-weight:700;color:var(--teal);font-variant-numeric:tabular-nums;
  }
  .tl-card{
    background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
    padding:22px 24px;box-shadow:var(--sh-card);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .tl-card:hover{transform:translateY(-2px);border-color:#C9DAF5;box-shadow:var(--sh-card-h);}
  .tl-card h3{font-size:19px;color:var(--ink);}
  .tl-card p{margin-top:10px;font-size:15px;color:var(--ink-2);}
  .tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
  .tag{
    display:inline-flex;align-items:center;font-size:13px;font-weight:600;
    padding:4px 10px;border-radius:999px;background:var(--brand-soft);color:var(--brand);
  }
  .tag-teal{background:var(--teal-soft);color:#0E8577;}
  .tag-orange{background:var(--orange);color:#fff;}

  /* ---------- 清单列表 ---------- */
  .check-list{margin-top:8px;}
  .check-list li{
    display:flex;gap:14px;align-items:flex-start;
    padding:16px 0;border-bottom:1px solid var(--line);
  }
  .check-list li:last-child{border-bottom:0;}
  .check-icon{
    flex:none;width:24px;height:24px;border-radius:8px;background:var(--teal-soft);
    display:flex;align-items:center;justify-content:center;margin-top:5px;
  }
  .check-icon svg{width:13px;height:13px;}
  .check-list strong{display:block;font-size:16px;color:var(--ink);font-weight:600;}
  .check-list span{display:block;font-size:14px;color:var(--ink-2);margin-top:2px;}

  .check-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 40px;}

  /* ---------- 深色证据区 ---------- */
  .proof-band{
    position:relative;overflow:hidden;
    background:var(--brand-deep);color:#fff;border-radius:var(--r-block);
    padding:52px 44px;
    box-shadow:0 18px 44px rgba(15,62,158,.24);
  }
  .proof-band::after{
    content:"";position:absolute;right:-40px;top:-40px;width:220px;height:220px;border-radius:50%;
    background:radial-gradient(circle,rgba(255,255,255,.14),transparent 70%);
  }
  .proof-head{position:relative;z-index:1;margin-bottom:32px;max-width:620px;}
  .proof-head h2{font-size:clamp(22px,2.4vw,30px);color:#fff;}
  .proof-head p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.74);}
  .proof-grid{
    position:relative;z-index:1;
    display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
    padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.16);margin-bottom:26px;
  }
  .proof-num{font-size:34px;font-weight:700;line-height:1.1;color:#7FE3D6;font-variant-numeric:tabular-nums;}
  .proof-label{margin-top:8px;font-size:14px;color:rgba(255,255,255,.78);}
  .proof-foot{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:8px 28px;font-size:14px;color:rgba(255,255,255,.66);}

  /* ---------- 表单区 ---------- */
  .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
  .form-copy p{color:var(--ink-2);margin-top:16px;}
  .contact-form{
    background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
    padding:28px;box-shadow:var(--sh-card);
  }
  .field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px;}
  .field label{font-size:13px;font-weight:500;color:var(--ink-3);}
  .field input,.field select,.field textarea{
    width:100%;padding:12px 14px;font-size:15px;font-family:inherit;color:var(--ink);
    background:#fff;border:1px solid #D7E2F5;border-radius:var(--r-input);
    transition:border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .field textarea{min-height:112px;resize:vertical;line-height:1.7;}
  .field select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%238494A8' stroke-width='1.6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;}
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(26,92,216,.10);
  }
  .field.has-error input,.field.has-error textarea{border-color:#E5484D;box-shadow:0 0 0 4px rgba(229,72,77,.10);}
  .field-error{font-size:12px;color:#E5484D;display:none;}
  .field.has-error .field-error{display:block;}
  .form-note{font-size:12px;color:var(--ink-3);margin-top:12px;line-height:1.7;}
  .form-ok{
    display:none;margin-top:14px;font-size:13px;color:#16A34A;background:#EEF9F2;
    border-radius:10px;padding:10px 14px;
  }
  .form-ok.is-show{display:block;}

  /* ---------- FAQ ---------- */
  .faq-list{display:flex;flex-direction:column;gap:12px;max-width:880px;}
  .faq-item{
    background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
    box-shadow:var(--sh-card);overflow:hidden;transition:border-color .2s ease-out;
  }
  .faq-item:hover{border-color:#C9DAF5;}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;background:none;border:0;text-align:left;
    font-size:17px;font-weight:500;color:var(--ink);transition:color .2s ease-out;
  }
  .faq-item.is-open .faq-q{color:var(--brand);}
  .faq-icon{
    flex:none;width:26px;height:26px;border-radius:8px;background:var(--brand-soft);
    display:flex;align-items:center;justify-content:center;position:relative;
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform .24s ease-out,opacity .24s ease-out;
  }
  .faq-icon::before{width:11px;height:2px;}
  .faq-icon::after{width:2px;height:11px;}
  .faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0;}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease-out;}
  .faq-a-inner{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--ink-2);}

  /* ---------- 交叉推荐 ---------- */
  .cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
  .cross-card{
    display:flex;flex-direction:column;gap:10px;
    background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
    padding:24px;box-shadow:var(--sh-card);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .cross-card:hover{transform:translateY(-2px);border-color:#C9DAF5;box-shadow:var(--sh-card-h);}
  .cross-card h3{font-size:18px;color:var(--ink);}
  .cross-card p{font-size:14px;color:var(--ink-2);}
  .cross-card .text-link{margin-top:auto;font-size:14px;}

  /* ---------- 结尾 CTA ---------- */
  .cta-band{
    position:relative;overflow:hidden;border-radius:var(--r-block);
    padding:56px 44px;color:#fff;
    background:linear-gradient(120deg,#0F3E9E 0%,#1A5CD8 100%);
    box-shadow:0 18px 44px rgba(15,62,158,.24);
  }
  .cta-band::before{
    content:"";position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-3.webp');
    background-size:cover;background-position:center;opacity:.22;
  }
  .cta-inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;}
  .cta-inner h2{font-size:clamp(22px,2.6vw,32px);color:#fff;}
  .cta-inner p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.82);max-width:560px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

  /* ---------- 页脚 ---------- */
  html body .site-footer{
    background:#0F1B2D;color:rgba(255,255,255,.72);padding:56px 0 0;margin-top:0;
  }
  .footer-grid{
    display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:32px;
    padding:40px 0 40px;border-top:1px solid rgba(255,255,255,.08);
  }
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
  .footer-brand .brand-mark{box-shadow:none;}
  .footer-brand .brand-text{color:#fff;font-size:17px;}
  .footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px;}
  .footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
  .footer-col ul{display:flex;flex-direction:column;gap:10px;}
  .footer-link{
    font-size:14px;color:rgba(255,255,255,.72);display:inline-block;
    transition:color .2s ease-out,transform .2s ease-out;
  }
  .footer-link:hover{color:#fff;transform:translateX(2px);}
  .footer-info p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.62);}
  .footer-info span{color:rgba(255,255,255,.42);}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
    padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.08);
    font-size:13px;color:rgba(255,255,255,.5);
  }

  /* ---------- 浮动 CTA ---------- */
  .float-cta{
    position:fixed;right:24px;bottom:28px;z-index:70;
    opacity:0;visibility:hidden;transform:translateY(10px);
    transition:opacity .25s ease-out,transform .25s ease-out,visibility .25s ease-out;
  }
  .float-cta.is-visible{opacity:1;visibility:visible;transform:none;}
  .float-cta a{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--brand);color:#fff;font-size:15px;font-weight:600;
    padding:14px 24px;border-radius:999px;box-shadow:var(--sh-cta);
    transition:background .2s ease-out,transform .2s ease-out;
  }
  .float-cta a:hover{background:var(--brand-deep);transform:translateY(-2px);}
  .float-cta .float-sub{display:none;}

  /* ---------- 响应式 ---------- */
  @media (max-width:1023px){
    .section{padding:72px 0;}
    .hero-grid{grid-template-columns:1fr;gap:36px;}
    .hero-visual img{aspect-ratio:16/9;}
    .float-card{position:static;margin-top:14px;max-width:none;}
    .intro-grid{grid-template-columns:1fr;gap:32px;}
    .form-grid{grid-template-columns:1fr;gap:36px;}
    .cross-grid{grid-template-columns:1fr 1fr;}
    .proof-grid{grid-template-columns:repeat(2,1fr);gap:24px 20px;}
    .check-grid{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  }
  @media (max-width:768px){
    html body .container{padding-left:16px;padding-right:16px;}
    .page-hero{padding:104px 0 48px;}
    .proof-band{padding:36px 22px;border-radius:20px;}
    .cta-band{padding:38px 22px;border-radius:20px;}
    .cta-inner{flex-direction:column;align-items:flex-start;}
    .tl-item{padding-left:64px;}
    .tl-node{width:42px;height:42px;border-radius:12px;font-size:14px;}
    .timeline::before{left:20px;}
    .contact-form{padding:22px;}
  }
  @media (max-width:640px){
    .section{padding:56px 0;}
    .hero-visual img{height:200px;aspect-ratio:auto;}
    .hero-actions .btn{width:100%;}
    .hero-stats{gap:20px;}
    .hero-stats li{min-width:calc(50% - 10px);}
    .cross-grid{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .float-cta{right:0;left:0;bottom:0;}
    .float-cta a{
      width:100%;justify-content:center;border-radius:0;
      padding:16px 20px calc(16px + env(safe-area-inset-bottom));
    }
    .float-cta .float-sub{display:inline;font-weight:500;color:rgba(255,255,255,.8);font-size:13px;}
  }

  @media print{
    .site-header,.float-cta,.site-footer{display:none !important;}
    .section{padding:16px 0;}
  }